阅读说明：本技术 旋转装置 (Rotating device ) 是由 方兆裕 于 2019-03-20 设计创作，主要内容包括：旋转装置包含可旋转件及限位件。可旋转件具有定位机构,定位机构包含止挡件及定位件,定位件可转动地套设于止挡件,部分止挡件对应设置于定位件的一侧；限位件固设于座体,限位件用以依据可旋转件的旋转方向选择性地挡止定位件。可旋转件沿第一旋转方向旋转至限位件与定位件相抵时,定位件受到限位件推抵而远离止挡件并相对于止挡件旋转,以容许定位件通过限位件；且可旋转件沿相反于第一旋转方向的第二旋转方向旋转至限位件与定位件相抵时,定位件受到限位件推抵而靠近止挡件,使定位件被挡止于限位件及止挡件之间,以定位可旋转件。(The rotating device comprises a rotatable part and a limiting part. The rotatable part is provided with a positioning mechanism, the positioning mechanism comprises a stop part and a positioning part, the positioning part is rotatably sleeved on the stop part, and part of the stop part is correspondingly arranged on one side of the positioning part; the limiting piece is fixedly arranged on the base body and used for selectively stopping the positioning piece according to the rotating direction of the rotatable piece. When the rotatable part rotates along a first rotating direction until the limiting part abuts against the positioning part, the positioning part is pushed by the limiting part to be away from the stopping part and rotates relative to the stopping part, so that the positioning part is allowed to pass through the limiting part; and when the rotatable piece rotates along a second rotation direction opposite to the first rotation direction until the limiting piece abuts against the positioning piece, the positioning piece is pushed by the limiting piece to be close to the stop piece, so that the positioning piece is stopped between the limiting piece and the stop piece to position the rotatable piece.)

1. A rotary device, comprising:

The rotatable part is rotatably arranged on a seat body and provided with a positioning mechanism, the positioning mechanism comprises a stop part and a positioning part, the stop part comprises a rotating shaft and a stop part, the stop part is convexly arranged on the rotating shaft, the positioning part is rotatably sleeved on the rotating shaft, and one side of the positioning part corresponds to the stop part; and

A position limiting member fixed on the seat body for selectively stopping the positioning member according to a rotation direction of the rotatable member,

When the rotatable member rotates in a first rotation direction until the limiting member abuts against the positioning member, the positioning member is pushed by the limiting member to be away from the stopping portion and rotates relative to the stopping member, so that the positioning member is allowed to pass through the limiting member; and when the rotatable member rotates in a second rotation direction opposite to the first rotation direction until the limiting member abuts against the positioning member, the positioning member is pushed by the limiting member to approach the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion to position the rotatable member.

2. The rotating apparatus according to claim 1, wherein the rotatable member comprises a rotating body, the positioning mechanism further comprises a supporting member disposed on the rotating body and connected to the stopping member, and the rotating shaft is disposed on the supporting member along a radial extension of the rotating body.

3. The rotating apparatus according to claim 2, wherein the positioning member comprises a plate portion and a shaft hole portion, the plate portion is protruded from the shaft hole portion, the shaft hole portion is sleeved on the rotating shaft, and a portion of the plate portion corresponds to the stopping portion.

4. The rotating apparatus according to claim 3, wherein the positioning member further comprises a rib disposed on the plate portion for separating a region of the plate portion corresponding to the stopping portion from a region of the plate portion not corresponding to the stopping portion.

5. The rotating apparatus according to claim 1, further comprising a movable ring and a blocking member, wherein the movable ring and the blocking member are disposed coaxially with the rotatable member, the rotatable member is connected to the movable ring and drives the movable ring to rotate, the blocking member is fixed to the base and located in a rotation path of the movable ring, and when the movable ring rotates along the rotation path and abuts against the blocking member, the blocking member is configured to block the movable ring to position the rotatable member.

6. the rotating apparatus according to claim 5, wherein the rotatable member further comprises a shaft portion and a protrusion, the positioning mechanism and the protrusion are disposed on a periphery of the shaft portion, the protrusion is located on the rotation path of the movable ring, the movable ring comprises a protrusion protruding along a portion of a periphery of the movable ring, and when the rotatable member rotates, the protrusion pushes the protrusion of the movable ring to rotate the movable ring along the rotation path until the protrusion and the blocking member abut against opposite ends of the protrusion, respectively.

7. The rotating apparatus according to claim 1, wherein the position-limiting member comprises a switch unit, and the switch unit is triggered when the rotatable member rotates in the second rotating direction opposite to the first rotating direction until the position-limiting member abuts against the positioning member.

8. A rotary device, comprising:

The rotatable part is rotatably arranged on a seat body and provided with a first positioning mechanism and a second positioning mechanism, the first positioning mechanism comprises a first stop part and a first positioning part, the second positioning mechanism comprises a second stop part and a second positioning part, the first stop part and the second stop part respectively comprise a rotating shaft and a stopping part, the stopping part is convexly arranged on the rotating shaft, the first positioning part and the second positioning part are respectively rotatably sleeved on the rotating shafts, and the stopping parts are respectively arranged on one sides of the first positioning part and the second positioning part; and

A position-limiting mechanism fixed on the base for selectively stopping the first positioning element or the second positioning element according to a rotation direction of the rotatable element,

When the rotatable piece rotates along a first rotating direction, the limiting mechanism allows the first positioning mechanism to pass through, and the second positioning piece is blocked between the limiting mechanism and the blocking part of the second blocking part, so that the rotatable piece is positioned; when the rotatable member rotates in a second rotation direction opposite to the first rotation direction, the limiting mechanism allows the second positioning mechanism to pass through, and the first positioning member is blocked between the limiting mechanism and the blocking portion of the first blocking member, so as to position the rotatable member.

9. The rotating apparatus according to claim 8, wherein the first positioning member is rotatably disposed on the rotating shaft of the first stopping member, the stopping portion of the first stopping member is correspondingly disposed on the side of the first positioning member, when the rotatable member rotates in the first rotating direction, the limiting mechanism allows the first positioning mechanism to pass through, so that the first positioning member is pushed by the limiting mechanism to be away from the stopping portion of the first stopping member and rotates in a first direction relative to the first stopping member, so as to allow the first positioning member to pass through the limiting mechanism; the second positioning member is rotatably sleeved on the rotating shaft of the second stop member, the stop portion of the second stop member is correspondingly disposed on the side of the second positioning member, when the rotatable member rotates in the second rotating direction, the limiting mechanism allows the second positioning member to be pushed by the limiting mechanism to be away from the stop portion of the second stop member and rotate in a second direction relative to the second stop member, and the first direction is opposite to the second direction.

10. The rotating apparatus according to claim 8, wherein the position-limiting mechanism comprises a first position-limiting member and a second position-limiting member, the rotatable member further comprises a shaft portion, the first position-limiting member and the second position-limiting member are disposed along an axial direction of the shaft portion, the first position-limiting member corresponds to the first position-limiting member to block the first position-limiting member and allow the second position-limiting member to pass, and the second position-limiting member corresponds to the second position-limiting member to block the second position-limiting member and allow the first position-limiting member to pass.

11. The rotating apparatus according to claim 10, wherein the first position-limiting member comprises a first switch unit, the second position-limiting member comprises a second switch unit, and the first switch unit is triggered when the rotatable member rotates in the second rotating direction until the first position-limiting member abuts against the first positioning member; when the rotatable member rotates along the first rotation direction until the second position-limiting member abuts against the second positioning member, the second switch unit is triggered.

12. The rotating apparatus according to claim 8, further comprising a driving gear, wherein the driving gear is rotated by a power, and the rotatable member comprises a gear portion engaged with the driving gear, and the driving gear rotates the rotatable member.

13. The rotating apparatus according to claim 12, wherein the first positioning mechanism and the second positioning mechanism each further comprise a supporting member, a plurality of supporting members are disposed on the gear portion and respectively connected to the first stop member and the second stop member, and a plurality of rotating shafts are respectively disposed on the plurality of supporting portions in a protruding manner.

14. The rotating apparatus according to claim 13, wherein the first positioning element and the second positioning element each comprise a plate portion and a shaft hole portion, the plate portion is protruded from the shaft hole portion, a portion of the plate portion corresponds to the corresponding stopping portion, and the shaft hole portion is sleeved on the corresponding rotating shaft.

15. The rotating apparatus according to claim 14, wherein at least one of the first positioning member and the second positioning member further comprises a rib, the rib is disposed on the plate portion, and the rib is used to separate a region of the plate portion corresponding to the first stopping portion or the second stopping portion from a region of the plate portion not corresponding to the first stopping portion or the second stopping portion.

16. The rotating apparatus according to claim 8, further comprising a movable ring and a blocking member, wherein the movable ring and the blocking member are disposed coaxially with the rotatable member, the rotatable member is connected to the movable ring and drives the movable ring to rotate, the blocking member is fixed to the base and located in a rotation path of the movable ring, and when the movable ring rotates along the rotation path and abuts against the blocking member, the blocking member is used to block the movable ring to position the rotatable member.

17. The rotating apparatus according to claim 16, wherein the movable ring has a protrusion protruding along a portion of a circumference of the movable ring, and when the rotatable member rotates, the protrusion pushes the protrusion of the movable ring to rotate the movable ring along the rotation path until the protrusion and the blocking member abut against opposite ends of the protrusion, respectively.

Technical Field

the invention relates to a rotating device, in particular to a rotating device with a limiting function.

Background

With the diversification of usage habits, the modern instruments or equipment often need reliable large-angle rotation control. However, the conventional rotating device is usually limited to the structural design and can only achieve effective control at forward and reverse rotation angles less than 180 degrees. When the rotating device is required to achieve the angle control of the forward rotation and the reverse rotation of more than 180 degrees, the rotating device needs a more complex stopping mechanism because the forward rotation and the reverse rotation have corresponding overlapping positions, and the mechanism interference is often caused, so that the rotating device is difficult to realize.

Disclosure of Invention

An object of the present invention is to provide a rotation device, which has a one-way position-limiting function and can freely rotate in a reverse direction.

In an embodiment, the rotating device of the present invention includes a rotatable element and a limiting element, wherein the rotatable element is rotatably disposed on the base, the rotatable element has a positioning mechanism, the positioning mechanism includes a stopping element and a positioning element, the stopping element includes a rotating shaft and a stopping portion, the positioning element is rotatably sleeved on the rotating shaft, and one side of the positioning element corresponds to the stopping portion; the limiting piece is fixedly arranged on the base body and used for selectively stopping the positioning piece according to the rotating direction of the rotatable piece, wherein when the rotatable piece rotates along the first rotating direction until the limiting piece abuts against the positioning piece, the positioning piece is pushed by the limiting piece to be away from the stopping piece and rotates relative to the stopping piece so as to allow the positioning piece to pass through the limiting piece; and when the rotatable member rotates along a second rotation direction opposite to the first rotation direction until the limiting member abuts against the positioning member, the positioning member is pushed by the limiting member to approach the stopping portion, so that the positioning member is stopped between the limiting member and the stopping portion to position the rotatable member.

In one embodiment, the rotatable member includes a rotating body, the positioning mechanism further includes a supporting member disposed on the rotating body and connected to the stopper, and the rotating shaft is disposed on the supporting member along a radial extension of the rotating body.

In an embodiment, the positioning element includes a plate portion and a shaft hole portion, the plate portion is protrudingly disposed in the shaft hole portion, the shaft hole portion is sleeved on the rotating shaft, and a portion of the plate portion corresponds to the stopper portion.

In an embodiment, the positioning element further includes a protruding rib disposed on the plate body portion, and the protruding rib is used to separate a region of the plate body portion corresponding to the stopping portion and a region of the plate body portion not corresponding to the stopping portion.

In an embodiment, the rotating device of the invention further includes a movable ring and a blocking member, wherein the movable ring and the blocking member are coaxially disposed with the rotatable member, the rotatable member is connected to the movable ring and drives the movable ring to rotate, the blocking member is fixed to the base and located in a rotation path of the movable ring, and when the movable ring rotates along the rotation path and abuts against the blocking member, the blocking member is used to block the movable ring to position the rotatable member.

In one embodiment, the rotatable member further includes a shaft portion and a protrusion, the positioning mechanism and the protrusion are disposed along an axial direction of the shaft portion, the protrusion is located on a rotation path of the movable ring, the movable ring includes a protrusion protruding along a portion of a circumference of the movable ring, and when the rotatable member rotates, the protrusion pushes the protrusion of the movable ring to rotate the movable ring along the rotation path until the protrusion and the blocking member respectively abut against opposite ends of the protrusion.

In an embodiment, the limiting member includes a switch unit, and when the rotatable member rotates in a second rotation direction opposite to the first rotation direction until the limiting member abuts against the positioning member, the switch unit is triggered.

Another objective of the present invention is to provide a rotation device, which has a bidirectional limiting function, and the rotation angle in each direction can be greater than 180 degrees.

In another embodiment, the rotating device of the present invention comprises a rotatable member and a position-limiting mechanism, wherein the rotatable member is rotatably disposed on the base, the rotatable member has a first positioning mechanism and a second positioning mechanism, the first positioning mechanism comprises a first stop member and a first positioning member, the second positioning mechanism comprises a second stop member and a second positioning member, the first stop member and the second stop member each comprise a rotating shaft and a stop portion, the first positioning member and the second positioning member are respectively rotatably sleeved on the rotating shafts, and the stop portions are respectively disposed on one sides of the first positioning member and the second positioning member; the limiting mechanism is fixedly arranged on the seat body and used for selectively stopping the first positioning piece or the second positioning piece according to the rotating direction of the rotatable piece, wherein when the rotatable piece rotates along the first rotating direction, the limiting mechanism allows the first positioning piece to pass through and the second positioning piece to be stopped between the limiting mechanism and the stopping part of the second stopping piece so as to position the rotatable piece; when the rotatable piece rotates along a second rotating direction opposite to the first rotating direction, the limiting mechanism allows the second positioning mechanism to pass through, and the first positioning piece is blocked between the limiting mechanism and the blocking part of the first blocking part, so that the rotatable piece is positioned.

In one embodiment, the first positioning element is rotatably sleeved on the rotating shaft of the first stop element, the stop portion of the first stop element is correspondingly arranged on the side of the first positioning element, and when the rotatable element rotates along the first rotating direction, the limiting mechanism allows the first positioning element to be pushed by the limiting mechanism to be away from the stop portion of the first stop element and rotate along the first direction relative to the first stop element, so as to allow the first positioning element to pass through the limiting mechanism; the second positioning member is rotatably sleeved on the rotating shaft of the second stop member, the stopping portion of the second stop member is correspondingly disposed on the side of the second positioning member, when the rotatable member rotates in the second rotating direction, the limiting mechanism allows the second positioning member to be pushed by the limiting mechanism to be away from the stopping portion of the second stop member and rotate in the second direction relative to the second stop member, and the first direction is opposite to the second direction.

In an embodiment, the limiting mechanism includes a first limiting member and a second limiting member, the rotatable member includes a shaft portion, the first positioning mechanism and the second positioning mechanism are axially disposed along the shaft portion, the first limiting member corresponds to the first positioning mechanism to block the first positioning mechanism and allow the second positioning mechanism to pass through, and the second limiting member corresponds to the second positioning mechanism to block the second positioning mechanism and allow the first positioning mechanism to pass through.

In one embodiment, the first limiting member includes a first switch unit, the second limiting member includes a second switch unit, and when the rotatable member rotates along the second rotation direction until the first limiting member abuts against the first positioning member, the first switch unit is triggered; when the rotatable member rotates along the first rotation direction until the second limiting member abuts against the second positioning member, the second switch unit is triggered.

In an embodiment, the first positioning mechanism and the second positioning mechanism further each include a supporting member, the supporting members are disposed in the gear portion and respectively connected to the first stop member and the second stop member, the first stop member and the second stop member respectively include a rotating shaft and a stopping portion, the first positioning member and the second positioning member are respectively rotatably sleeved on the rotating shafts, the stopping portions are respectively disposed on the sides of the first positioning member and the second positioning member, and the rotating shafts are respectively disposed on the supporting portions in a protruding manner.

In an embodiment, each of the first positioning element and the second positioning element includes a plate portion and a shaft hole portion, the plate portion is protrudingly disposed in the shaft hole portion, the shaft hole portion is sleeved on the rotating shaft, a portion of the plate portion corresponds to the corresponding stopping portion, and the shaft hole portion is connected to the plate portion and sleeved on the corresponding rotating shaft.

In an embodiment, at least one of the first positioning element and the second positioning element further includes a protruding rib, the protruding rib is disposed on the plate body portion, and the protruding rib is used to separate a region of the plate body portion corresponding to the first stopping portion or the second stopping portion and a region of the plate body portion not corresponding to the first stopping portion or the second stopping portion.

In an embodiment, the rotating device of the present invention further includes a driving gear, wherein the driving gear receives power to rotate, the rotatable member includes a gear portion, the gear portion is engaged with the driving gear, and the driving gear drives the rotatable member to rotate.

Compared with the prior art, the rotating device of the invention provides selective stopping action by matching the limiting piece with the positioning piece and the stopping piece of the positioning mechanism according to different rotating directions of the rotatable piece, can effectively achieve unidirectional positioning, and can freely rotate in a reverse direction. Furthermore, the rotating device of the invention uses the limiting mechanism to match with the two one-way positioning mechanisms, which not only can provide selective stopping function according to different rotating directions of the rotatable piece, but also can effectively achieve two-way positioning of more than 180 degrees.

Drawings

Fig. 1 is a schematic view of a rotating device according to an embodiment of the present invention.

Fig. 2 is a partially exploded view of a rotating device according to an embodiment of the present invention.

fig. 3 is a partially exploded view of a rotatable member according to an embodiment of the present invention.

Fig. 4A and 4B are respectively an assembly and an exploded schematic view of a positioning mechanism according to an embodiment of the invention.

Fig. 5A and 5B are schematic perspective and side views of a positioning element according to an embodiment of the invention.

Fig. 6 is a schematic view illustrating the rotatable member of the rotating device of the embodiment of the present invention rotated 90 degrees in the first direction.

Fig. 6A is a schematic view of a positioning element of the rotating device in fig. 6 passing through a limiting element.

Fig. 7 is a schematic view illustrating that the rotatable member of the rotating device of the embodiment of the invention rotates 270 degrees in the second direction.

Fig. 8 is a schematic view of a rotating device according to another embodiment of the present invention.

Fig. 8A and 8B are schematic configuration views of the positioning mechanism of fig. 8.

Fig. 9A is a schematic view of the rotatable member of the rotating apparatus of fig. 8 rotated 90 degrees in a first direction.

Fig. 9B is a schematic view of the rotatable member of the rotating apparatus of fig. 8 rotated 270 degrees in the first direction.

Fig. 10A is a schematic view of the rotatable member of the rotating apparatus of fig. 8 rotated 90 degrees in a second direction.

Fig. 10B is a schematic view of the rotatable member of the rotating apparatus of fig. 8 rotated 270 degrees in the second direction.

Fig. 11 is a schematic view of a rotating device according to another embodiment of the present invention.

Fig. 12A is a schematic view of the rotatable member of the rotating apparatus of fig. 11 rotated 270 degrees in a first direction.

Fig. 12B is a schematic view of the rotatable member of the rotating apparatus of fig. 11 rotated 270 degrees in the second direction.

fig. 13A to 13C are partially exploded, side views and assembled views of a rotating device according to another embodiment of the present invention.

The reference numbers are as follows:

1. 2, 3 rotating device

10. 10 ', 10' rotatable member

20 position limiting part

20' limiting mechanism

20a first limiting part

20b second limiting part

30 seat body

32 accommodation groove

34 baffle

40 drive gear

50 Movable ring

52 bump

522 first end

524 second end

100 positioning mechanism

100a first positioning mechanism

100b second positioning mechanism

110 stop

110a first stop

110b second stop

112 stop part

112a first stop portion

112b second stop

114 rotating shaft

114a rotating shaft

114b rotating shaft

114c card slot

120 positioning piece

120a first positioning member

120b second positioning piece

122 plate body part

122a first plate body part

122b second plate body part

1222 first board body area

1224 second board area

124 axle hole part

124a axle hole

126 inclined plane

128 ribs

130 rotating body

132 gear part

134 shaft body part

134a upper shaft part

134b lower shaft body part

136 projection

140. 140a, 140b support

150 fastener

F1 and F2 acting force

R1 first direction of rotation

R1' second direction of rotation

r2 first direction

R2' second direction

Detailed Description

The invention provides a rotating device, in particular to a rotating device which can achieve large-angle limiting through the matching of a limiting piece and a positioning mechanism. In particular, the rotating device of the present invention can be applied to any device requiring one-way limit or two-way limit, such as a display device, but not limited thereto. Hereinafter, details of the rotating apparatus according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, in one embodiment, the rotating device 1 of the present invention includes a rotatable element 10 and a limiting element 20. The rotating device 10 further comprises a base 30 for supporting the rotatable member 10 to rotate. The rotatable member 10 is rotatably disposed on the seat 30, and the rotatable member 10 has a positioning mechanism 100. The positioning mechanism 100 includes a stopping member 110 and a positioning member 120, the stopping member 110 includes a rotating shaft 114 and a stopping portion 112, the stopping portion 112 is protrudingly disposed on the rotating shaft 114, the positioning member 120 is rotatably sleeved on the rotating shaft 114, the stopping portion 112 is correspondingly disposed on one side of the positioning member 120, in this embodiment, the positioning member 120 is rotatably sleeved on the rotating shaft 114, and the stopping portion 112 is overlapped on one side of the positioning member 120. The position-limiting member 20 is fixedly disposed on the base 30, and the position-limiting member 20 is used for selectively stopping the positioning member 120 according to the rotation direction of the rotatable member 10. Specifically, when the rotatable element 10 rotates in the first rotation direction R1 until the limiting element 20 abuts against the positioning element 120 (as shown in fig. 6), the positioning element 120 is pushed by the limiting element 20 to be away from the stopping portion 112 and rotates relative to the stopping element 110, so as to allow the positioning element 120 to pass through the limiting element 20; when the rotatable element 10 rotates in a second rotation direction R1' opposite to the first rotation direction R1 until the position-limiting element 20 abuts against the positioning element 120 (as shown in fig. 7), the positioning element 120 is pushed by the position-limiting element 20 to approach the stopping portion 112, so that the positioning element 120 is stopped between the position-limiting element 20 and the stopping element 110, and the rotatable element 10 is positioned.

Specifically, the position-limiting member 20 is preferably disposed adjacent to a side of the rotatable member 10 so as to be located on the moving path of the positioning mechanism 100. In an embodiment, the position-limiting element 20 can be implemented as a switch element (e.g., a limit switch), such that the position-limiting element 20 stops the positioning element 120 and the switch unit (not shown) is triggered, but not limited thereto. In another embodiment, the position-limiting member 20 can be implemented as a bar protruding toward the rotatable member 10 for stopping the positioning member 120. Specifically, the rotatable element 10 includes a rotating body 130, and the positioning mechanism 100 is disposed on the rotating body 130 and rotates with the rotating body 130 relative to the seat 30. When the rotating body 130 rotates to drive the positioning mechanism 100 to move toward the limiting member 20, the limiting member 20 can selectively allow the positioning mechanism 100 to pass through to allow the rotating body 130 to continue rotating, or block the positioning mechanism 100 to limit the rotating body 130 to rotate so as to achieve positioning.

In this embodiment, the rotating device 1 preferably further comprises a driving gear 40 for receiving power to rotate and driving the rotatable member 10 to rotate. For example, the rotating body 130 includes a gear portion 132, and the gear portion 132 is engaged with the driving gear 40, such that the driving gear 40 receives power provided by a motor to rotate, and drives the gear portion 132 to rotate, thereby driving the rotatable member 10 to rotate, but not limited thereto. In other embodiments, depending on the application, the rotatable element 10 can be driven by a driving device (e.g., a motor) without being driven by the driving gear 40, or the rotatable element 10 can be rotated by an external force applied by a user without providing a driving device. In other words, the rotatable member 10 may be implemented as any convenient rotating element and may be rotated by a user applying an external force or by power provided by other power means.

As shown in fig. 2, in an embodiment, the limiting member 20 and the driving gear 40 are preferably disposed on the base 30 corresponding to the rotatable member 10, but not limited thereto. In other embodiments, the limiting member 20 and the driving gear 40 can be disposed independently of the base 30 according to practical applications. In this embodiment, the base 30 preferably has an accommodating groove 32, and the rotating body 130 is partially inserted into the accommodating groove 32 and can rotate in the accommodating groove 32 relative to the base 30. For example, the rotating body 130 preferably includes a gear portion 132 and a shaft portion 134, and the gear portion 132 and the shaft portion 134 are coaxially disposed, such that the shaft portion 134 is rotatably inserted in the accommodating groove 32, and the gear portion 132 and the shaft portion 134 can rotate together relative to the seat body 30, but not limited thereto. In other embodiments (not shown), the shaft portion 134 can be integrated into the housing 30, and the rotating body 130 is preferably a ring-shaped gear portion 132, so that the gear portion 132 is rotatably sleeved on the shaft portion of the housing 30, and the gear portion 132 can rotate relative to the shaft portion of the housing 30.

As shown in fig. 3, in one embodiment, the shaft portion 134 includes an upper shaft portion 134a and a lower shaft portion 134 b. Specifically, the upper shaft portion 134a and the lower shaft portion 134b are respectively disposed on the upper surface and the lower surface of the gear portion 132 to form the rotating body 130 as shown in fig. 2, and can be respectively used to connect a device to be rotated (for example, a display device) and the base 30, but not limited thereto. In other embodiments, the upper shaft portion 134a and the lower shaft portion 134b may be integrated into a single shaft portion, and the gear portion 132 may be connected to the shaft portion 134 by locking, fastening, molding, welding, etc. according to practical applications. Further, the positioning mechanism 100 is preferably disposed on the gear portion 132 of the rotating body 130.

Specifically, referring to fig. 4A and 4B in conjunction with fig. 1, in an embodiment, the positioning mechanism 100 further includes a support 140, and the support 140 is disposed on the rotating body 130 and connected to the stopper 110. The rotating shaft 114 preferably extends along the radial direction of the rotating body 130 and protrudes from the supporting member 140, and the stopping portion 112 is located below the rotating shaft 114 to correspond to the positioning member 120 (e.g., 122b in fig. 5A). Specifically, the positioning mechanism 100 is fixed to the upper surface of the gear portion 132 and adjacent to the outer edge of the gear portion 132 by the supporting member 140 in a fixing, clamping, or the like manner. The rotating shaft 114 extends toward the periphery of the gear portion 132 along the radial direction of the gear portion 132, so that the positioning element 120 is rotatably sleeved on the rotating shaft 114. The stopping portion 112 is a retaining wall disposed below the rotating shaft 114, so that the positioning element 120 partially overlaps the stopping portion 112 when the rotating shaft 114 is sleeved with the positioning element 120. The positioning mechanism 100 further comprises a locking member 150 for preventing the positioning member 120 from being disengaged from the rotating shaft 114. In one embodiment, the locking member 150 may be a C-shaped ring, and the shaft 114 may have a locking slot 114C. After the positioning element 120 is sleeved on the rotating shaft 114, the locking element 150 of the C-ring is engaged with the locking slot 114C to limit the axial movement of the positioning element 120 along the rotating shaft 114, thereby preventing the positioning element 120 from being disengaged from the rotating shaft 114.

referring to fig. 5A and 5B in combination with fig. 4B, in an embodiment, the positioning member 120 includes a plate portion 122 and a shaft hole portion 124, and the plate portion 122 is disposed in the shaft hole portion 124 in a protruding manner. The shaft hole portion 124 is used for sleeving the rotating shaft 114, and a part of the plate portion 122 is overlapped with the stopping portion 112. The shaft hole portion 124 has a slope 126, and the slope 126 is preferably inclined toward the stopper portion 110. The shaft hole portion 124 is formed with a shaft hole 124a, and the diameter of the shaft hole 124a is preferably slightly larger than the diameter of the rotating shaft 114, so that the positioning element 120 can rotate relative to the rotating shaft 114 by engaging the shaft hole 124a with the rotating shaft 114. The inclined surface 126 of the shaft hole portion 124 is preferably inclined downward from the outer edge of the shaft hole portion 124 toward the stopping portion 112, so that the positioning member 120 rotates relative to the rotating shaft 114 without being caught to the stopping portion 112. Furthermore, the positioning member 120 further includes a rib 128, and the rib 128 is disposed on the plate portion 122 and preferably below the inclined surface 126. Specifically, the ribs 128 are preferably ribs protruding outward from the plate surface of the plate body 122 to enhance the structural strength of the plate body 122. In this embodiment, the rib 128 is located below the shaft hole portion 124 and one end of the rib 128 is a sidewall defining the shaft hole 124 a. Furthermore, the rib 128 is used to separate the area of the plate body 122 corresponding to the stopping portion 112 and the area of the plate body 122 not corresponding to the stopping portion 112. For example, the ribs 128 divide the plate body 122 into a first plate body region 1222 and a second plate body region 1224. In this embodiment, the first board body area 1222 is far away from the support 140 and the area not overlapping with the stopping portion 112, and the second board body area 1224 is adjacent to the support 140 and the area overlapping with the stopping portion 112, but not limited thereto. Depending on the arrangement direction of the positioning member 120 relative to the rotating shaft 114 (e.g., the protruding direction of the protruding rib 128), the first plate body area 1222 may be an area overlapping with the stopping portion 112, and the second plate body area 1224 may be an area not overlapping with the stopping portion 112.

Furthermore, the stopping portion 112 is disposed in a rotation path of the plate portion 122 to limit the positioning element 120 to rotate only in one direction relative to the stopping portion 112. As shown in fig. 4A, the stopping portion 112 is located at the left side of the plate body portion 122 relative to the plate body portion 122 of the positioning member 120, that is, the stopping portion 112 is located on the clockwise rotation path of the plate body portion 122, so that the plate body portion 122 can only rotate counterclockwise relative to the rotating shaft 114.

The operation of the rotating apparatus 1 will be described later with reference to fig. 6 and 7. As shown in fig. 6, when the rotatable member 10 rotates in the first rotation direction R1 until the limiting member 20 abuts against the positioning member 120, the limiting member 20 rotates the positioning member 120 relative to the stopping portion 110 to allow the positioning member 120 to pass through the limiting member 20. Specifically, when the gear portion 132 of fig. 1 rotates 90 degrees in a clockwise direction (i.e., the first rotation direction R1), the positioning mechanism 100 causes the positioning element 120 to hit the limiting element 20 along with the rotation of the gear portion 132, and further generates a counterclockwise acting force F1 on the left side of the plate portion 122 (i.e., the limiting element 20 and the stopping element 112 are located on the same side of the plate portion 122). At this time, as shown in fig. 6A, since the stopping portion 112 is located forward in the moving direction of the plate portion 122 (i.e., the protruding rib 128 protrudes toward the limiting member 20), the limiting member 20 pushes the positioning member 120 to be away from the stopping portion 112 and rotate relative to the stopping portion 112, i.e., the plate portion 122 rotates counterclockwise (i.e., the first direction R2) relative to the rotating shaft 114 and tilts up, so that the positioning member 120 passes through the limiting member 20, and the rotatable member 10 is allowed to continue to rotate clockwise (i.e., the first rotating direction R1). After the positioning element 120 passes through the limiting element 20, the tilted plate portion 122 may rotate downward automatically by its own gravity to reset the positioning element 120. In this state, the rotatable element 10 can rotate more than 360 degrees in the first rotation direction R1, i.e. the limiting element 20 does not limit the rotatable element 10 in the first rotation direction R1.

As shown in fig. 7, when the rotatable member 10 rotates in a second rotation direction R1' opposite to the first rotation direction R1 until the limiting member 20 abuts against the positioning member 120, the limiting member 20 stops the positioning member 120, so that the positioning member 120 is stopped between the limiting member 20 and the stopping portion 112 to position the rotatable member 10. Specifically, when the gear portion 132 of fig. 1 rotates 270 degrees in a counterclockwise direction (i.e., the second rotation direction R1'), the positioning mechanism 100 causes the positioning element 120 to hit the limiting element 20 along with the rotation of the gear portion 132, and further generates a clockwise acting force F2 on the right side of the plate portion 122 (i.e., the limiting element 20 and the stopping element 112 are located on the opposite side of the plate portion 122). At this time, since the stopping portion 112 is behind the moving direction of the plate portion 122 (i.e., the protruding rib 128 protrudes away from the limiting member 20), the limiting member 20 pushes the positioning member 120 toward the stopping portion 112, i.e., the positioning member 120 approaches the stopping portion 112, so that the positioning member 120 is stopped between the stopping portion 112 and the limiting member 20 and cannot rotate relative to the rotating shaft 114, and the rotatable member 10 cannot continue to rotate in the counterclockwise direction (i.e., the second rotating direction R1') for positioning. In this state, the counterclockwise force of the positioning element 120 acting on the limiting element 20 can trigger the switch unit as the limiting element 20, thereby achieving a unidirectional positioning (e.g., counterclockwise positioning) of the rotating device 1. That is, when the rotatable member 10 rotates in the second rotation direction R1' opposite to the first rotation direction R1 until the positioning member 120 is stopped between the stopping portion 112 and the limiting member 20, the switch unit is triggered. It should be noted that, according to practical applications, the positioning angle of the rotating device 1 can be changed by adjusting the relative positions of the positioning mechanism 100 and the limiting member 20, and the positioning direction of the rotating device 1 can be changed by changing the relative position of the positioning member 120 with respect to the stopping portion 112. For example, the counterclockwise unidirectional rotation of the positioning element 120 relative to the stopping portion 112 in fig. 4A is changed to the clockwise unidirectional rotation of the positioning element 120 relative to the stopping portion 112, so that the rotating device 1 has a unidirectional positioning in a clockwise direction, for example.

Furthermore, the rotating device of the invention can achieve bidirectional positioning by matching the two positioning mechanisms with one or two limiting pieces. As shown in fig. 8, in another embodiment, the rotating device 2 of the present invention comprises a rotatable element 10 'and a position-limiting mechanism 20', wherein the rotatable element 10 'has two position-limiting mechanisms (e.g., 100a and 100b), and the position-limiting mechanism 20' comprises a position-limiting member 20. Specifically, the rotatable member 10' has a first positioning mechanism 100a and a second positioning mechanism 100b, and the structural details of the first positioning mechanism 100a and the second positioning mechanism 100b can refer to the related description of the positioning mechanism 100 of fig. 4A. The following description focuses on the arrangement of the first positioning mechanism 100a and the second positioning mechanism 100b and the bidirectional positioning operation of the rotating device 2, for example, about ± 270 degrees.

As shown in fig. 8, the first positioning mechanism 100a and the second positioning mechanism 100b are preferably disposed on two opposite sides of the rotating body 130 (i.e. at positions 180 degrees apart), and are preferably located on the same horizontal plane, i.e. the horizontal projection positions of the rotating shaft 134 are the same (or the heights of the rotating shaft and the rotating body are the same) respectively. In this embodiment, the limiting member 20 is preferably disposed between the first positioning mechanism 100a and the second positioning mechanism 100b (e.g., at a position different from each of the first positioning mechanism 100a and the second positioning mechanism 100b by 90 degrees), so as to selectively block the first positioning mechanism 100a or the second positioning mechanism 100b to position the rotatable member 10'. In this embodiment, as shown in fig. 8A, the first positioning mechanism 100a includes a first stopper 110a and a first positioning member 120a, and the first positioning mechanism 100a may be connected to the rotating body 130 (or the gear portion 132) through the first stopper 110a and the support member 140 a. In this embodiment, the first stopper 110a includes a rotating shaft 114A and a first stopping portion 112a, the first positioning element 120a and the first stopper 110a are disposed in the same manner as in fig. 4A, that is, the first positioning element 120a is rotatably sleeved on the rotating shaft 114A of the first stopper 110a, and a portion of the first stopper 110a (i.e., the first stopping portion 112a) is disposed on a side of the first positioning element 120 a. The first stopping portion 112a is located on the clockwise direction (i.e., on the left side) of the first positioning member 120a, such that when a counterclockwise force is applied to the first plate portion 122a, the first plate portion 122a can rotate counterclockwise (i.e., in the first direction R2) relative to the rotating shaft 114a (or the first stopping portion 112 a). As shown in fig. 8B, the second positioning mechanism 100B includes a second stopper 110B and a second positioning member 120B, and the second positioning mechanism 100B can be connected to the rotating body 130 (or the gear portion 132) through the second stopper 110B and the supporting member 140B. In this embodiment, the second stopping element 110b includes a rotating shaft 114b and a second stopping portion 112b, the second positioning element 120b and the second stopping element 110b are disposed opposite to fig. 4A, that is, the second positioning element 120b is rotatably sleeved on the rotating shaft 114b of the second stopping element 110b, and a portion of the second stopping element 110b (i.e., the second stopping portion 112b) is correspondingly disposed on one side of the second positioning element 120 b. The second stopping portion 112b is located at the counterclockwise direction (i.e. right side) of the second positioning member 120b, so that when a clockwise force is applied to the second plate portion 122b, the second plate portion 122b can rotate clockwise (i.e. the second direction R2') relative to the rotating shaft 114b (or the second stopping portion 112 b).

The position-limiting mechanism 20 ' is fixed to the base 30, and the position-limiting mechanism 20 ' is used for selectively stopping the first positioning element 120a or the second positioning element 120b according to the rotation direction of the rotatable element 10 '. The bidirectional positioning operation of the rotary device 2 is described later with reference to fig. 9A to 9B and fig. 10A to 10B. As shown in fig. 9A-9B, when the rotatable element 10 'of fig. 8 is rotated in the first rotation direction R1, the position-limiting mechanism 20' allows the first positioning mechanism 100a to pass through and the second positioning member 120B is stopped between the position-limiting mechanism 20 'and the second stopping portion 112B to position the rotatable element 10'. Specifically, when the gear portion 132 of fig. 8 rotates 90 degrees in, for example, a clockwise direction (i.e., the first rotation direction R1), the second positioning mechanism 100b rotates to a 180-degree direction of the limiting member 20, and like the embodiment of fig. 6, the first positioning member 120a is pushed by the limiting mechanism 20' to be away from the first blocking portion 112a and rotates in the first direction R2 relative to the first blocking portion 110 a. Specifically, since the first blocking portion 112a is located in front of the moving direction of the first plate portion 122a, the counterclockwise acting force F1 generated by the limiting member 20 pushes the first positioning member 120a to rotate relative to the first blocking portion 112a (e.g. the first direction R2), i.e. the first plate portion 122a tilts up with respect to the first blocking portion 112a by rotating counterclockwise, so that the first positioning member 120a passes through the limiting member 20, and the rotatable member 10' is allowed to continue to rotate clockwise (i.e. the first rotating direction R1) until 270 degrees. As shown in fig. 9B, when the gear portion 132 of fig. 8 rotates 270 degrees in, for example, a clockwise direction (i.e., the first rotation direction R1), the first positioning mechanism 100a has passed through the limiting member 20 and rotates to a 180-degree direction of the limiting member 20, the second positioning member 120B of the second positioning mechanism 100B rotates to abut against the limiting member 20, and the second positioning member 120B is pushed by the limiting member 20 to approach the second stopping portion 112B. Specifically, the second positioning element 120b of the second positioning mechanism 100b contacts the limiting element 20, and generates a counterclockwise force F1 on the second plate portion 122 b. At this time, since the second blocking portion 112b is behind the moving direction of the second plate portion 122b, the limiting member 20 pushes the second positioning member 120b towards the second blocking portion 112b, so that the second positioning member 120b is blocked between the limiting member 20 and the second blocking portion 112b and cannot rotate relative to the rotating shaft (or the second blocking portion 112b), and further the rotatable member 10' cannot continue to rotate clockwise (i.e. the first rotating direction R1) to achieve positioning clockwise by about 270 degrees.

As shown in fig. 10A-10B, when the rotatable element 10 ' of fig. 8 rotates in the second rotation direction R1 ', the limiting mechanism 20 ' allows the second positioning mechanism 100B to pass through and the first positioning element 120A is stopped between the limiting mechanism 20 ' and the first stopping portion 112a to position the rotatable element 10 '. Specifically, as shown in fig. 10A, when the gear portion 132 of fig. 8 rotates 90 degrees in a counterclockwise direction (i.e., the second rotation direction R1 '), for example, the first positioning mechanism 100A rotates to 180 degrees of the position-limiting member 20, and the second positioning member 120b is pushed by the position-limiting mechanism 20 ' to be away from the second stopping portion 112b and rotates in the second direction R2 ' relative to the second stopping member 110 b. Specifically, since the second blocking portion 112b is located in front of the moving direction of the second plate portion 122b, the clockwise acting force F2 generated by the limiting member 20 pushes the second positioning member 120b to rotate relative to the second blocking portion 112b (i.e. the second direction R2 '), i.e. the second plate portion 120b rotates clockwise and tilts relative to the second blocking portion 112b, so that the second positioning member 120b passes through the limiting member 20, and the rotatable member 10 ' is allowed to continue to rotate counterclockwise (i.e. the second rotating direction R1 ') until 270 degrees. As shown in fig. 10B, when the gear portion 132 of fig. 8 rotates 270 degrees in, for example, a counterclockwise direction (i.e., the second rotation direction R1'), the second positioning mechanism 100B has passed through the limiting member 20 and rotates to 180 degrees of the direction of the limiting member 20, and similar to fig. 7, the first positioning member 120a rotates to abut against the limiting member 20, and the first positioning member 120a is pushed by the limiting member 20 to approach the first stopping portion 112 a. Specifically, the first positioning element 120a of the first positioning mechanism 100a contacts the stopper 20, and generates a clockwise acting force F2 on the first plate portion 122 a. At this time, since the first stopping portion 112a is behind the moving direction of the first plate portion 122a, the limiting member 20 pushes the first positioning member 120a toward the first stopping portion 112a, that is, the first positioning member 120a is blocked between the first stopping portion 112a and the limiting member 20 and cannot rotate relative to the rotating shaft (or the first stopping portion 112a), so that the rotatable member 10 'cannot continue to rotate in the counterclockwise direction (i.e., the second rotating direction R1') to achieve positioning at about 270 degrees counterclockwise.

Furthermore, in another embodiment, as shown in fig. 11, the rotating device 3 of the present invention comprises a rotatable element 10 "and a position-limiting mechanism 20 ', wherein the rotatable element 10" has two position-limiting mechanisms (e.g., 100a and 100b), and the position-limiting mechanism 20' comprises two position-limiting members (e.g., 20a and 20 b). The differences between the rotatable element 10 "and the limiting mechanism 20' and the previous embodiments and the bi-directional positioning operation of the rotating device 3, for example, about ± 270 degrees, will be emphasized later. Specifically, the limiting mechanism 20' includes a first limiting member 20a and a second limiting member 20b, and the first positioning mechanism 100a and the second positioning mechanism 100b are disposed along the axial direction of the shaft body 134. The first limiting member 20a corresponds to the first positioning mechanism 100a to stop the first positioning mechanism 100a and allow the second positioning mechanism 100b to pass through, and the second limiting member 20b corresponds to the second positioning mechanism 100b to stop the second positioning mechanism 100b and allow the first positioning mechanism 100a to pass through.

Specifically, in this embodiment, the first positioning mechanism 100a and the second positioning mechanism 100b are preferably disposed at two opposite sides of the rotating body 130 (i.e. at positions 180 degrees apart), and are preferably located at different horizontal planes, i.e. the horizontal projection positions of the rotating shaft 134 are different (or the heights of the rotating shaft relative to the base 30 are different). Furthermore, the first limiting member 20a and the second limiting member 20b are preferably disposed adjacent to each other and are disposed corresponding to the first positioning mechanism 100a and the second positioning mechanism 100b, respectively, so that the horizontal projection positions of the first limiting member 20a and the second limiting member 20b on the rotating shaft 134 are different. For example, the first position-limiting member 20a is disposed on the rotation path of the first positioning mechanism 100a, but not on the rotation path of the second positioning mechanism 100b, so that the second positioning member 120b preferably passes under the first position-limiting member 20a without contacting the first position-limiting member 20 a. Similarly, the second limiting member 20b is disposed on the rotation path of the second positioning mechanism 100b, but not on the rotation path of the first positioning mechanism 100a, so that the first positioning member 120a preferably passes over the second limiting member 20b without contacting the second limiting member 20 b.

As shown in fig. 12A, when the rotatable element 10 ″ of fig. 11 rotates 270 degrees in a clockwise direction (i.e., the first rotation direction R1), the first positioning mechanism 100a passes through the first limiting element 20a and rotates to 180 degrees of the first limiting element 20a, and the second positioning element 120b of the second positioning mechanism 100b contacts the second limiting element 20b, so as to generate a counterclockwise force on the second plate portion 122b, such that the second limiting element 20b pushes the second positioning element 120b toward the second stopping portion 112b, and the second positioning element 120b is stopped between the second limiting element 20b and the second stopping portion 112b, thereby achieving a positioning of the rotating device 3 rotating about 270 degrees in the clockwise direction.

As shown in fig. 12B, when the rotatable element 10 ″ of fig. 11 rotates 270 degrees in a counterclockwise direction (i.e., the second rotation direction R2), for example, the second positioning mechanism 100B passes through the second limiting member 20B and rotates to 180 degrees of the second limiting member 20B in a similar manner as described above, and the first positioning member 120a of the first positioning mechanism 100a contacts the first limiting member 20a, so as to generate a clockwise force on the first plate portion 122a, such that the first limiting member 20a pushes against the first positioning member 120a toward the first stopping portion 112a, and the first positioning member 120a is stopped between the first limiting member 20a and the first stopping portion 112a, thereby achieving the positioning of the rotating device 3 rotating about 270 degrees in the counterclockwise direction.

It should be noted that, similar to the embodiment of fig. 1, the first limiting member 20a may include a first switch unit (not shown), and the second limiting member 20b may include a second switch unit (not shown). Therefore, when the rotatable element 10 ″ rotates in the second rotation direction R1' until the first limiting element 20a abuts against the first positioning element 120a, and the first positioning element 120a is blocked between the first blocking portion 112a and the limiting element 20, the first switch unit is triggered; when the rotatable element 10 ″ rotates in the first rotation direction R1 until the second limiting element 20b abuts against the second positioning element 120b, and the second positioning element 120b is blocked between the limiting element 20 and the second stopping portion 112b, the second switch unit is triggered.

In addition, the rotating devices 1, 2 and 3 of the present invention can further limit the positioning of the rotating devices through the movable ring and the blocking member. The rotating device 1 is taken as an example to illustrate later, and the rotating devices 2 and 3 can have similar structures. As shown in fig. 13A to 13C, the rotating device 1 further includes a movable ring 50 and a blocking member 34, wherein the movable ring 50 and the blocking member 34 are disposed coaxially with the rotatable member 10. The rotatable member 10 is connected to the movable ring 50 and drives the movable ring 50 to rotate, and the blocking member 34 is fixed to the seat 30 and located in a rotation path of the movable ring 50. When the movable ring 50 rotates along the rotation path and abuts against the stopper 34, the stopper 34 serves to block the movable ring 50 to position the rotatable member 10. Furthermore, the rotatable member 10 has a protrusion 136, and the positioning mechanism 100 and the protrusion 136 are disposed along the axial direction of the shaft portion 134 and located at the periphery of the shaft portion 134, i.e. the height of the positioning mechanism 100 and the protrusion 136 relative to the seat body 30 is different. The movable ring 50 has a projection 52, and the projection 52 is protruded along a portion of the circumference of the movable ring 50. When the rotatable member 10 rotates, the protrusion 136 pushes the protrusion 52 of the movable ring 50, so that the movable ring 50 rotates along the rotation path until the protrusion 136 and the stopper 34 abut against two opposite ends (e.g., a first end 522 and a second end 524) of the protrusion 52, respectively.

Specifically, the movable ring 50 is preferably a flat ring, and the movable ring 50 is rotatably sleeved on the rotating shaft 134 and located between the rotatable element 10 and the seat 30. In one embodiment, the protrusion 52 of the movable ring 50 may be an arc-shaped protrusion protruding radially and extending downward concentrically with the movable ring 50, and the protrusion 52 has a corresponding predetermined central angle along the arc length extending along the movable ring 50. In other words, the bump 52 has a first end 522 and a second end 524, and an included angle between the first end 522 and the center of the circle and the second end 524 is a central angle. For example, the central angle of the protrusion 52 is preferably 90 degrees, but not limited thereto, with a bi-directional orientation of about ± 270 degrees. The central angle of the protrusion 52 may vary according to the positioning angle. In this embodiment, the blocking member 34 is preferably disposed on the stop of the seat 30 to correspond to the protrusion 52 of the movable ring 50, and the protrusion 136 may be a block protruding from the lower side of the gear portion 132. In one embodiment, the positions of the protrusion 136, the protrusion 52 of the movable ring 50 and the stopper 34 are preferably located on the circumference of the same circle, and the thickness of the protrusion 52 of the movable ring 50 in the axial direction is preferably partially overlapped with the protrusion 136 and the stopper 34.

When the rotatable member 10 rotates (e.g., counterclockwise), the protrusion 136 of the rotatable member 10 pushes against the first end 522 of the protrusion 52 of the movable ring 50, thereby moving the movable ring 50. When the rotatable member 10 rotates counterclockwise about 270 degrees, the protrusion 136 of the rotatable member 10 pushes against the first end 522 of the protrusion 52 and presses the second end 524 of the protrusion 52 against the stop 34, further limiting the counterclockwise rotation of the rotatable member 10. When the power applied to the rotatable member 10 is too large to disable the position limiting mechanism of the position limiting member 20 and the positioning mechanism 100, the movable ring 50 and the blocking member 34 are arranged to provide a safety mechanism for preventing the rotatable member 10 from bursting.

Furthermore, when the rotatable member 10 rotates clockwise, the protrusion 136 of the rotatable member 10 is located at the first end 522 of the protrusion 52 of the movable ring 50, and does not move the movable ring 50. When the rotatable member 10 rotates clockwise about 270 degrees, the protrusion 136 of the rotatable member 10 pushes against the second end 524 of the protrusion 52 and presses the first end 522 of the protrusion 52 against the stop 34, which restricts clockwise rotation of the rotatable member 10, thereby achieving clockwise positioning of the rotatable member 10. In other words, in the embodiment of fig. 13A to 13C, the rotating device 3 can be positioned clockwise by about 270 degrees by the arrangement of the movable ring 50.

In summary, the rotation device of the present invention provides a selective stopping function by the positioning element of the positioning mechanism and the stopping element through the positioning element, so as to achieve unidirectional positioning and reverse free rotation. Furthermore, the rotating device of the invention uses the limiting mechanism to match with the two one-way positioning mechanisms, which not only can provide selective stopping function according to different rotating directions of the rotatable piece, but also can effectively achieve two-way positioning of more than 180 degrees.

The present invention has been described in terms of the above embodiments, which are, however, intended to be illustrative only and not limiting. Other modifications to the exemplary embodiments specifically illustrated herein will be apparent to those skilled in the art without departing from the spirit of the invention. Accordingly, such modifications are also encompassed within the scope of the present invention and are limited only by the following claims.