阅读说明：本技术 投影设备 (Projection device ) 是由 陈友才 杨长明 于 2020-06-12 设计创作，主要内容包括：本申请实施例公开了一种投影设备,属于投影技术领域。该投影设备包括：投影主机和投影屏幕,投影屏幕包括基座、卷曲机构、第一连接架、升降机构和幕布；卷曲机构可旋转的连接在第一连接架上,第一连接架与基座的侧壁连接,第一连接架能够调整卷曲机构的端部的高度,升降机构支撑在基座上；幕布的第一侧边与卷曲机构固定连接,幕布上与第一侧边相对的第二侧边与升降机构固定连接。本申请实施例中,由于第一连接架能够调整卷曲机构的端部的高度,进而调整幕布的第一侧边的高度,这样升降机构作用在幕布的第二侧边的拉紧力发生变化。因此,能够通过卷曲机构的端部的高度保证升降机构作用在幕布上的拉紧力均匀化,以保证幕布的平整度。(The embodiment of the application discloses projection equipment, and belongs to the technical field of projection. The projection device includes: the projection screen comprises a base, a curling mechanism, a first connecting frame, a lifting mechanism and a curtain; the curling mechanism is rotatably connected to a first connecting frame, the first connecting frame is connected with the side wall of the base, the first connecting frame can adjust the height of the end part of the curling mechanism, and the lifting mechanism is supported on the base; the first side of curtain and the fixed connection of curling mechanism, the second side and the elevating system fixed connection relative with first side on the curtain. In this application embodiment, because the height of the tip of crimping mechanism can be adjusted to first link, and then the height of the first side of adjustment curtain, the straining force that elevating system was used in the second side of curtain changes like this. Therefore, the tension force of the lifting mechanism acting on the curtain can be ensured to be uniform through the height of the end part of the curling mechanism, so that the flatness of the curtain is ensured.)

1. A projection device, characterized in that the projection device comprises:

the projection host is used for emitting a light beam;

the projection screen comprises a base, a curling mechanism, a first connecting frame, a lifting mechanism and a curtain;

the curling mechanism is rotatably connected to the first connecting frame, the first connecting frame is connected with the side wall of the base, the first connecting frame can adjust the height of the end part of the curling mechanism, and the lifting mechanism is supported on the base;

the first side of the curtain is fixedly connected with the curling mechanism, the second side, opposite to the first side, of the curtain is fixedly connected with the lifting mechanism, the curling mechanism can control the curtain to be folded, and the lifting mechanism can control the curtain to be unfolded and receive the light beams.

2. The projection device of claim 1, wherein the first link frame includes a first link plate, a second link plate, and a first link post;

the first connecting plate comprises a first side plate and a second side plate which are connected into an L shape, and the second connecting plate comprises a third side plate and a fourth side plate which are connected into an L shape;

the end part of the curling mechanism is rotatably limited on the first side plate, the third side plate is fixedly connected with the base, the first end of the first connecting column is fixedly connected with one of the second side plate and the fourth side plate, the second end of the first connecting column penetrates through the other one of the second side plate and the fourth side plate and is in limited connection, the length direction of the first connecting column is parallel to the height direction of the curtain, and the distance between the second side plate and the fourth side plate is adjustable.

3. The projection device of claim 2, wherein the first side plate has a limiting hole, and an end of the curling mechanism extends along a length direction to form a positioning shaft, and the positioning shaft is rotatably limited in the limiting hole.

4. The projection device of claim 3, wherein the first connecting frame further comprises an elastic pad, the elastic pad is of a cylindrical structure, and the elastic pad is sleeved on the positioning shaft and clamped between the hole wall of the limiting hole and the positioning shaft.

5. The projection device of claim 2, wherein the first side plate has a restraining barrel on a side facing the crimping mechanism, an end of the crimping mechanism being rotatably restrained within the restraining barrel.

6. The projection device of any one of claims 2-5, wherein the first side plate has an oblong hole, a length direction of the oblong hole is parallel to a length direction of the first connecting column, and the first side plate is fixedly connected with the side wall of the base through a fixing bolt based on the oblong hole.

7. The projection device of claim 6, wherein the first link further comprises a sliding washer that fits over the fixing bolt and is clamped between the first side plate and the side wall of the base.

8. The projection device of any of claims 2-5, wherein a first end of the first connection post is fixedly coupled to the second side plate, the fourth side plate has a positioning hole, and a second end of the first connection post passes through the positioning hole and is threadedly coupled to a retaining nut.

9. The projection device of claim 8, wherein the alignment hole is an oblong hole, and a length direction of the alignment hole is perpendicular to an axial direction of the platen mechanism.

10. The projection device as claimed in any one of claims 2 to 5, wherein the first connection frame further comprises a compression spring, the compression spring is sleeved on the first connection post, and two ends of the compression spring abut against the second side plate and the fourth side plate respectively.

11. The projection device of any of claims 2-5, wherein the second side panel is higher than the fourth side panel.

Technical Field

The embodiment of the application relates to the technical field of projection, in particular to projection equipment.

Background

With the continuous development of science and technology, projection equipment is more and more applied to the work and the life of people. Currently, a projection device includes a projection host and a projection screen. The light outlet of the projection equipment faces the projection screen, the light beam emitted by the projection equipment is projected to the projection screen, and the projection screen reflects the light beam so as to realize the display of pictures. In order to ensure the display effect of the picture, the projection screen is ensured to have certain flatness by the requirement.

In the related art, a projection screen includes a base, a curling mechanism, a support mechanism and a curtain, wherein the support mechanism includes a first support frame, a second support frame and a beam. The curling mechanism is rotatably fixed on the base, the first end of the first support frame and the first end of the second support frame are connected with the base, the second end of the first support frame and the second end of the second support frame are connected with the cross beam, the first side edge of the curtain is fixedly connected with the curling mechanism, and the second side edge, opposite to the first side edge, of the curtain is fixedly connected with the cross beam. When the curtain is not used, the first support frame and the second support frame are retracted, and the curtain is curled through the curling mechanism; when using the curtain, prop up the crossbeam through first support frame and second support frame to can prop up the curtain through the crossbeam, guarantee the roughness of curtain.

However, after the first support frame and the second support frame are folded and supported for many times, the first support frame and the second support frame are worn, that is, the effective height of the supporting beam of the first support frame is inconsistent with the effective height of the supporting beam of the second support frame, so that the supporting forces of the first support frame and the second support frame to the beam are inconsistent, the tensioning force of the beam to the curtain is inconsistent, and the curtain is uneven.

Disclosure of Invention

The embodiment of the application provides a projection equipment, can solve the relatively poor problem of projection screen's curtain roughness that projection equipment includes. The technical scheme is as follows:

in one aspect, a projection apparatus is provided, the projection apparatus comprising:

the projection host is used for emitting a light beam;

the projection screen comprises a base, a curling mechanism, a first connecting frame, a lifting mechanism and a curtain;

the curling mechanism is rotatably connected to the first connecting frame, the first connecting frame is connected with the side wall of the base, the first connecting frame can adjust the height of the end part of the curling mechanism, and the lifting mechanism is supported on the base;

the first side of the curtain is fixedly connected with the curling mechanism, the second side, opposite to the first side, of the curtain is fixedly connected with the lifting mechanism, the curling mechanism can control the curtain to be folded, and the lifting mechanism can control the curtain to be unfolded and receive the light beams.

Optionally, the first connecting frame comprises a first connecting plate, a second connecting plate and a first connecting column;

the first connecting plate comprises a first side plate and a second side plate which are connected into an L shape, and the second connecting plate comprises a third side plate and a fourth side plate which are connected into an L shape;

the end part of the curling mechanism is rotatably limited on the first side plate, the third side plate is fixedly connected with the base, the first end of the first connecting column is fixedly connected with one of the second side plate and the fourth side plate, the second end of the first connecting column penetrates through the other one of the second side plate and the fourth side plate and is in limited connection, the length direction of the first connecting column is parallel to the height direction of the curtain, and the distance between the second side plate and the fourth side plate is adjustable.

Optionally, the first side plate is provided with a limiting hole, a positioning shaft extends from an end of the curling mechanism along the length direction, and the positioning shaft is rotatably limited in the limiting hole.

Optionally, first link still includes the cushion, the cushion is the tubular structure, the cushion cup joints on the location is epaxial, and presss from both sides tightly the pore wall in spacing hole with between the location axle.

Optionally, the first side plate is provided with a limiting barrel on one side facing the curling mechanism, and the end part of the curling mechanism is rotatably limited in the limiting barrel.

Optionally, the first side plate is provided with an oblong hole, the length direction of the oblong hole is parallel to the length direction of the first connecting column, and the first side plate is fixedly connected with the side wall of the base through a fixing bolt based on the oblong hole.

Optionally, the first connecting frame further includes a sliding gasket, and the sliding gasket is sleeved on the fixing bolt and clamped between the first side plate and the side wall of the base.

Optionally, the first end of the first connecting column is fixedly connected with the second side plate, the fourth side plate has a positioning hole, and the second end of the first connecting column passes through the positioning hole and is in threaded connection with a locking nut.

Optionally, the positioning hole is an oblong hole, and a length direction of the positioning hole is perpendicular to an axial direction of the winding drum mechanism.

Optionally, the first connecting frame further includes a compression spring, the compression spring is sleeved on the first connecting column, and two ends of the compression spring are respectively abutted on the second side plate and the fourth side plate.

Optionally, the second side panel is higher than the fourth side panel.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least can comprise:

because the height of the tip of crimping mechanism can be adjusted to first link, and then the height of the first side of adjustment curtain for the rate of tension of curtain self changes, and elevating system acts on the tension on the second side of curtain like this and changes. That is, the tension applied by the lift mechanism to the second side of the curtain varies with the height of the end of the winding mechanism. Therefore, under the condition that the tension force of the lifting mechanism acting on the second side edge of the curtain can be adjusted through the height of the end part of the curling mechanism, the homogenization of the tension force of the lifting mechanism acting on the curtain can be ensured, and the flatness of the curtain can be ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a projection apparatus provided in an embodiment of the present application;

fig. 2 is a schematic rear view of a projection screen according to an embodiment of the present disclosure;

FIG. 3 is a schematic side view of a projection screen according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a connection mode of a curling mechanism provided by an embodiment of the application;

FIG. 5 is a schematic structural view of another crimping mechanism attachment provided by an embodiment of the present application;

fig. 6 is an exploded view of a crimping mechanism attachment provided in accordance with an embodiment of the present application.

Reference numerals:

1: a projection host; 2: a projection screen;

21: a base; 22: a crimping mechanism; 23: a lifting mechanism; 24: a curtain; 25: a first connecting frame;

211: a side wall; 221: positioning the shaft; 251: a first connecting plate; 252: a second connecting plate; 253: a first connecting column; 254: a compression spring;

2511: a first side plate; 2512: a second side plate; 2521: a third side plate; 2522: a fourth side plate;

25111: a limiting hole; 25112: a long round hole; 25221: and (7) positioning the holes.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.

Fig. 1 illustrates a schematic structural diagram of a projection device provided in an embodiment of the present application, and fig. 2 illustrates a schematic structural diagram of a projection screen provided in an embodiment of the present application. Referring to fig. 1 and 2, the projection apparatus includes: the projection host 1 is used for emitting light beams; the projection screen 2, the projection screen 2 includes the base 21, curls the organization 22, the lifting gearing 23 and curtain 24; the curling mechanism 22 is rotatably connected to the base 21, the lifting mechanism 23 is supported on the base 21, a first side of the curtain 24 is fixedly connected with the curling mechanism 22, a second side opposite to the first side of the curtain 24 is fixedly connected with the lifting mechanism 23, the curling mechanism 22 can control the curtain 24 to be packed, and the lifting mechanism 23 can control the curtain 24 to be unfolded and receive the light beam.

In the embodiment of the application, when the curtain 24 is used, the curtain 24 can be supported and expanded by the lifting mechanism 23, and then the light beam emitted by the projection host 1 is received by the curtain 24; when the curtain 24 is not used, the curtain 24 can be curled on the curling mechanism 22 through the rotation of the curling mechanism 22 so as to realize the collection of the curtain 24; thus, by unfolding or folding the curtain 24, the normal projection of the curtain 24 in use is ensured, and the occupied space of the projection screen 2 when not in use is reduced.

The term rotatable means that the winding mechanism rotates in its own circumferential direction, that is, rotates with its own center line as a rotation axis.

The projection host 1 includes an optical engine for emitting a light beam to the curtain 24.

Optionally, the optical engine is an ultra-short focus optical engine. In order to ensure the display effect of the light beam emitted by the optical engine on the curtain 24, the vertical distance from the center point of the light outlet of the optical engine to the plane where the curtain 24 is unfolded is equal to the product of the throw ratio of the optical engine and the width of the display area on the curtain 24, wherein the width of the display area is the dimension along the horizontal direction.

Optionally, the base 21 has a receiving portion having a light-transmitting area, the optical engine is fixed in the receiving portion, and the light beam emitted from the optical engine passes through the light-transmitting area to the curtain 24. In this way, the optical engine and the projection screen 24 are integrally connected by the base 21, so that the relative position between the optical engine and the screen 24 of the projection screen 2 can be fixed, and the optical engine can be prevented from moving relative to the screen 24.

Of course, in other embodiments, the optical engine is a telephoto optical engine, and the like, which is not limited in this application.

The projection host 1 comprises an optical engine, a control circuit board, an audio processing system, a heat dissipation system, a sound and a heat sink, wherein the audio processing system and the heat dissipation system are respectively electrically connected with the control circuit board, the audio processing system is also electrically connected with the sound, and the heat dissipation system is also electrically connected with the heat sink. The control circuit board controls the audio processing system to process the audio information output by the control circuit board and externally play the processed audio information through the sound box. When the image information is displayed and the audio information is externally displayed, the control circuit board can control the heat dissipation system to drive the heat sink to dissipate heat, so that the function of each device is prevented from being influenced by high temperature.

In some embodiments, the curtain 24 includes a cloth body and an optical film, a first side of the cloth body is fixedly connected to the curling mechanism 22, a second side of the cloth body opposite to the first side is fixedly connected to the lifting mechanism 23, and the optical film is fixed to the cloth body to form a display area on the cloth body, that is, the optical film on the cloth body is the display area. In this way, the cloth can be folded or unfolded by connecting the cloth to the curling mechanism 22 and the lifting mechanism 23, respectively, and the optical film is driven to be synchronously folded or unfolded.

In some embodiments, the winding mechanism 22 includes a winding controller electrically coupled to a winding motor, a winding motor drivingly coupled to the winding drum, and a winding drum fixedly coupled to a first side of the sheet 24. The controller that curls can control the curling motor and start or stop, and the curling motor can drive the reel rotation to drive curtain 24 synchronous revolution through the reel, thereby realize curling curtain 24 on the reel.

Alternatively, the crimping controller may control the crimping motor to rotate in a forward direction or a reverse direction upon receiving a control signal transmitted from a remote controller communicatively connected thereto. Of course, the curling controller can also be electrically connected with a control key, and then a control signal can be sent to the curling controller through the control key so as to control the forward rotation or the reverse rotation of the curling motor.

Optionally, the curling controller may include a single chip microcomputer and a signal receiver, the single chip microcomputer is electrically connected to the signal receiver and the curling motor, so that after the signal receiver receives the control signal, the signal receiver sends the control signal to the single chip microcomputer, and the single chip microcomputer controls the curling motor to rotate forward or backward based on the control signal.

In some embodiments, the lifting mechanism 23 includes a plurality of first support bars, a plurality of second support bars, and a cross beam; the first end and the base 21 of first bracing piece, the second end and the first end of the second bracing piece that corresponds of first bracing piece to and the second end and the crossbeam of second bracing piece are rotatable coupling, and the second side and the crossbeam fixed connection that are relative with first side on the curtain 24.

Wherein, the V-shaped opening of the first support bar and the second support bar after being connected faces the edge of the curtain 24 or faces away from the edge of the curtain 24. That is, when the lifting mechanism 23 includes two first support rods and two second support rods, the V-shaped openings of the first support rods and the second support rods are opposite to each other, or the V-shaped openings of the first support rods and the second support rods are opposite to each other.

Optionally, the rotatable connection is realized between the first support rod and the base 21, between the first support rod and the corresponding second support rod, and between the second support rod and the cross beam through a rotating shaft.

Because be rotatable coupling between base 21, first bracing piece, second bracing piece and the crossbeam to can make first bracing piece use the position of being connected with base 21 to rotate as the central point under the exogenic action, first bracing piece drives the second bracing piece and uses the position of being connected with first bracing piece to rotate as the central point this moment, with the crossbeam of propping up, the crossbeam drives curtain 24 and expandes when propping up the crossbeam like this.

In the embodiment of the application, after first bracing piece and second bracing piece rotate many times, wearing and tearing take place very easily to make first bracing piece and second bracing piece prop up the crossbeam height and change, and then make the holding power of being used in on the crossbeam inhomogeneous, the straining force that the crossbeam was used in on curtain 24 at this moment is also inhomogeneous, leads to the roughness of curtain 24 after the expansion to be relatively poor.

In order to ensure the flatness of the curtain 24, in a first possible implementation, the flatness of the curtain 24 is ensured by the cooperation between the curling mechanism 22 and the base 21.

In some embodiments, as shown in fig. 2 or 3, the projection screen 2 includes a first connecting frame 25, an end of the curling mechanism 22 is rotatably connected to the first connecting frame 25 (an end of the winding drum is rotatably connected to the first connecting frame 25), the first connecting frame 25 is connected to the side wall 211 of the base 21, and the first connecting frame 25 can adjust the height of the end of the curling mechanism 22. In this way, since the height of the end of the curling mechanism 22 can be adjusted by the first link 25, and the height of the first side of the curtain 24 can be adjusted, the tension of the curtain 24 itself is changed, and thus the tension applied to the second side of the curtain 24 by the lifting mechanism 23 (i.e., the cross member) is changed. That is, the tension applied by the elevator mechanism 23 to the second side of the curtain 24 varies with the height of the end of the winding mechanism 22. In this way, under the condition that the tension force of the lifting mechanism 23 acting on the second side edge of the curtain 24 can be adjusted through the height of the end part of the curling mechanism 22, the tension force of the lifting mechanism 23 acting on the curtain 24 can be ensured to be uniform, and the flatness of the curtain 24 can be ensured.

One end of the curling mechanism 22 is connected to the base 21 through the corresponding first connecting frame 25, and of course, both ends of the curling mechanism 22 may be connected to the base 21 through the corresponding first connecting frames 25, which is not limited in the embodiment of the present application.

Alternatively, as shown in fig. 4 or 5, the first connecting frame 25 includes a first connecting plate 251, a second connecting plate 252, and a first connecting column 253, the first connecting plate 251 includes a first side plate 2511 and a second side plate 2512 connected in an L shape, and the second connecting plate 252 includes a third side plate 2521 and a fourth side plate 2522 connected in an L shape. The end of the winding mechanism 22 is rotatably limited on the first side plate 2511 (the end of the winding drum is rotatably connected on the first side plate 2511), the third side plate 2521 is fixedly connected with the base 21, the first end of the first connecting column 253 is fixedly connected with one of the second side plate 2512 and the fourth side plate 2522, the second end of the first connecting column 253 passes through the other one of the second side plate 2512 and the fourth side plate 2522 and is in limited connection, the length direction of the first connecting column 253 is parallel to the height direction of the curtain 24, and the distance between the second side plate 2512 and the fourth side plate 2522 is adjustable.

As shown in fig. 5, the second side plate 2512 is higher than the fourth side plate 2522, that is, the second side plate 2512 is located above the fourth side plate 2522. Of course, as shown in fig. 4, the second side plate 2512 is lower than the fourth side plate 2522, i.e., the second side plate 2512 is located below the fourth side plate 2522.

Thus, the distance between the second side plate 2512 and the fourth side plate 2522 is adjustable, and the length direction of the first connecting column 253 is parallel to the height direction of the curtain 24, so the distance between the second side plate 2512 and the fourth side plate 2522 in the height direction of the curtain 24 is adjustable. Since the fourth side plate 2522 is fixedly connected to the base 21 via the third side plate 2521, and the second side plate 2512 is retained on the rolling mechanism 22 via the first side plate 2511, the height of the rolling mechanism 22, and hence the height of the first side of the curtain 24, can be adjusted via the second side plate 2512 and the fourth side plate 2522.

Alternatively, a first end of the first connection pillar 253 is fixedly connected to the second side plate 2512, a second end of the first connection pillar 253 has external threads, and the second end of the first connection pillar 253 passes through the fourth side plate 2522 to be threadedly connected to the lock nut. That is, as shown in fig. 6, the first end of the first connection column 253 is fixedly connected to the second side plate 2512, the fourth side plate 2522 has a positioning hole 25221, and the second end of the first connection column 253 passes through the positioning hole 25221 and is threadedly connected to the lock nut. In this way, the length of the portion of the first connection column 253 between the second side plate 2512 and the fourth side plate 2522, and thus the distance between the second side plate 2512 and the fourth side plate 2522, can be adjusted by tightening the lock nut at the second end of the first connection column 253.

Further, the positioning hole 25221 is an elongated hole, and the longitudinal direction of the positioning hole 25221 is perpendicular to the axial direction of the crimping mechanism 22. Because when the curtain 24 is tightened by the cross beam and the curling mechanism 22, the surface of the curtain 24 may not be a vertical surface, and when the height of the end of the curling mechanism 22 is independently adjusted, the included angle between the surface of the curtain 24 and the horizontal plane is also changed, so that the distance between the projection host 1 and the curtain 24 is changed, and the picture displayed by the curtain 24 is easily deformed. Since the positioning hole 25221 is an oblong hole and the length direction is perpendicular to the axial direction of the winding mechanism 22, that is, the length direction of the positioning hole 25221 is perpendicular to the surface of the curtain 24, the end of the winding mechanism 22 can be adjusted in the direction perpendicular to the surface of the curtain 24 to ensure the inclination angle of the curtain 24 and further ensure that the picture displayed by the curtain 24 is not deformed.

When the first side plate 2511 is used for limiting the position of the curling mechanism 22, optionally, as shown in fig. 6, the first side plate 2511 is provided with a limiting hole 25111, the end of the curling mechanism 22 extends in the length direction to form a positioning shaft 221, and the positioning shaft 221 is rotatably limited in the limiting hole 25111. By the positioning shaft 221 extending into the limiting hole 25111, the first side plate 2511 limits the end of the curling mechanism 22 to prevent the curling mechanism 22 from moving in the height direction of the curtain 24 and/or the direction perpendicular to the curtain 24.

It should be noted that the first connecting frame 25 further includes an elastic pad (not shown) having a cylindrical structure, which is sleeved on the positioning shaft 221 and clamped between the hole wall of the limiting hole 25111 and the positioning shaft 221. Thus, on the one hand, the friction between the positioning shaft 221 and the stopper hole 25111 when the curling mechanism 22 rotates can be reduced, so that the rotation resistance of the curling mechanism 22 can be reduced, and the noise when the curling mechanism 22 rotates can be reduced. On the other hand, when the height of one end of the curling mechanism 22 is adjusted, the curling mechanism 22 rotates by a small amplitude with the other end as the rotation center, so that the height of the other end of the curling mechanism 22 is also adjusted by a small amplitude, and at this time, due to the compression of the elastic pad, the positioning shaft 221 at the other end of the curling mechanism 22 can extrude the sleeved elastic pad, so that the small amplitude adjustment is realized, and the normal adjustment of the height of one end of the curling mechanism 22 is ensured.

Optionally, the first side plate 2511 has a limiting barrel (not shown) on a side facing the crimping mechanism 22, and an end of the crimping mechanism 22 is rotatably limited in the limiting barrel. In this way, the end of the curling mechanism 22 extends into the limiting cylinder, so that the first side plate 2511 limits the end of the curling mechanism 22 to prevent the curling mechanism 22 from moving in the height direction of the curtain 24 and/or in the direction perpendicular to the curtain 24.

At this time, the end of the curling mechanism 22 is also sleeved with an elastic pad having a cylindrical structure to reduce the rotation resistance of the curling mechanism 22 and reduce the noise when the curling mechanism 22 rotates, while ensuring the normal adjustment of the height of the end of the curling mechanism 22.

In some embodiments, after the height adjustment of the end of the crimping mechanism 22 is performed, in order to further ensure the stability of the crimping mechanism 22, as shown in fig. 6, the first side plate 2511 has an elongated hole 25112, the length direction of the elongated hole 25112 is parallel to the length direction of the first connecting column 253, and the first side plate 2511 is fixedly connected with the side wall 211 of the base 21 through a fixing bolt based on the elongated hole 25112. That is, the first side plate 2511 and the base 21 can be fixed by the fixing bolt based on the oblong hole 25112, and the end of the crimping mechanism 22 can be further limited by the fixed first side plate 2511.

The length direction of the oblong hole 25112 is parallel to the length direction of the first connecting column 253, that is, the length direction of the oblong hole is the moving direction of the first side plate 2511, so that the situation that the first side plate 2511 cannot be fixed to the base plate due to the change of the position of the first side plate 2511 after the first side plate 2511 moves can be avoided.

Further, the first connecting frame 25 further includes a sliding gasket, which is sleeved on the fixing bolt and clamped between the first side plate 2511 and the side wall 211 of the base 21. Like this, through the sliding gasket that sets up, can reduce the resistance between the first curb plate 2511 and the base 21 when removing for first curb plate 2511 is more smooth and easy when removing.

Alternatively, a slide washer is bonded to the side wall 211 of the base 21, the slide washer having a circular hole; or the sliding gasket is adhered to the first side plate 2511, and a through hole is formed in the position, corresponding to the long round hole 25112, of the sliding gasket, so that the sliding gasket is prevented from blocking the movement of the first side plate 2511.

In some embodiments, as shown in fig. 4, 5 or 6, the first connecting frame 25 further includes a compression spring 254, the compression spring 254 is sleeved on the first connecting column 253, and two ends of the compression spring 254 abut against the second side plate 2512 and the fourth side plate 2522 respectively. Since the difference in the tightening force of the cross beam to the curtain 24 is small, the tightening force of the cross beam on the curtain 24 can be ensured to be uniform by fine-tuning the distance between the second side plate 2512 and the fourth side plate 2522. In order to avoid the adjustment range of the distance between the second side plate 2512 and the fourth side plate 2522 being too large, the compression spring 254 can prevent the distance between the second side plate 2512 and the fourth side plate 2522 from being reduced, that is, the distance between the second side plate 2512 and the fourth side plate 2522 can be adjusted by the blocking action of the compression spring 254.

In a second possible implementation, the adjustment is made by the structure of the lifting mechanism 23 itself.

In some embodiments, the lifting mechanism 23 includes a plurality of elastic tensioning mechanisms, the plurality of elastic tensioning mechanisms correspond to the plurality of first supporting rods one by one, the elastic tensioning mechanisms are slidably supported at the connecting portions of the first supporting rods and the second supporting rods, that is, the elastic tensioning mechanisms bypass the connecting portions (rotating shafts) of the first supporting rods and the second supporting rods, the first ends of the elastic tensioning mechanisms are fixedly connected with the first supporting rods, the second ends of the elastic tensioning mechanisms are fixedly connected with the second supporting rods, the free lengths of the elastic tensioning mechanisms are adjustable, and the elastic tensioning mechanisms can tension the first supporting rods and the second supporting rods to support the cross beam.

Because the first bracing piece and the second bracing piece can be strained to elasticity straining device to make the V-arrangement opening that first bracing piece and second bracing piece formed have the trend of expanding, also be the trend that the effective height of first bracing piece and second bracing piece supporting beam has the uprising, and then can exert extra holding power to the crossbeam through first bracing piece and second bracing piece. The free length of the elastic tensioning mechanism can be adjusted, namely the tensioning force of the elastic tensioning mechanism acting on the first supporting rod and the second supporting rod can be adjusted, so that the supporting force additionally exerted on the cross beam by the first supporting rod and the second supporting rod can be adjusted. Therefore, in the case where the supporting force applied to the cross member is adjustable, it is possible to ensure the uniformity of the supporting force applied to the cross member, that is, the uniformity of the tension force applied to the curtain 24 by the cross member, thereby ensuring the flatness of the curtain 24.

Optionally, the elastic tensioning mechanism comprises an extension spring, a tightening member and a flexible member, the extension spring, the tightening member and the flexible member are connected, two ends of the connected extension spring are fixedly connected with the first support rod and the second support rod respectively, the flexible member is slidably supported at a connection part of the first support rod and the second support rod, that is, the flexible member bypasses a connection part (rotating shaft) of the first support rod and the second support rod, and the length of the tightening member is adjustable.

Optionally, the flexible member is a strip-shaped nylon rope, or other strip-shaped structures, as long as the flexible member can be bent at will.

Optionally, the tightening piece includes a first screw, a second screw and a second connecting column, the thread of the first screw is opposite to the thread of the second screw, the first end of the first screw is in threaded connection with the first end of the second connecting column, and the second end of the first screw is fixedly connected with the second end of the extension spring. Therefore, due to the fact that the threads of the first screw rod are opposite to those of the second screw rod, when the second connecting column is rotated relative to the first screw rod and the second screw rod, the first screw rod and the second screw rod can synchronously extend towards the direction far away from the first connection or synchronously retract towards the direction close to the first connection, and therefore the length of the tightening piece can be adjusted.

Of course, in still other embodiments, the tightener includes a third screw and a third connecting post, with a first end of the third screw being threadedly connected to a first end of the third connecting post. Like this, can realize the adjustment of the whole length of packing spare through the relative rotation of third screw rod and third spliced pole.

When adjusting the length of the tightening element, there must be one of the third threaded rod and the third connecting rod that can rotate, while in order to avoid a synchronous rotation of the component connected to the tightening element, this component is connected rotatably in the circumferential direction to one of the third threaded rod and the third connecting rod.

For the connection among the extension spring, the tightening member and the flexible member, optionally, the first end of the extension spring is fixedly connected to the first support rod, the second end of the extension spring is fixedly connected to the first end of the flexible member, the second end of the flexible member is fixedly connected to the first end of the tightening member, and the second end of the tightening member is fixedly connected to the second support rod.

At the moment, in combination with the first structure of the tightening piece, the second end of the first screw rod is fixedly connected with the second end of the flexible piece, and the second end of the second screw rod is fixedly connected with the second supporting rod; or the second end of the second screw rod is fixedly connected with the second end of the flexible part, and the second end of the first screw rod is fixedly connected with the second supporting rod. In combination with the second structure of the tightening piece, the second end of the third screw is fixedly connected with the second end of the flexible piece, and the second end of the second connecting column is rotatably connected with the second supporting rod along the circumferential direction; or the second end of the third screw rod is rotatably connected with the second end of the flexible part along the circumferential direction, and the second end of the second connecting column is fixedly connected with the second supporting rod.

Optionally, the first end of the extension spring is fixedly connected to the first support rod, the second end of the extension spring is fixedly connected to the first end of the tightening member, the second end of the tightening member is fixedly connected to the first end of the flexible member, and the second end of the flexible member is fixedly connected to the second support rod.

At this time, in combination with the first structure of the tightening member, the second end of the first screw is fixedly connected with the second end of the extension spring, and the second end of the second screw is fixedly connected with the first end of the flexible member; or the second end of the second screw rod is fixedly connected with the second end of the extension spring, and the second end of the first screw rod is fixedly connected with the first end of the flexible part. In combination with the second structure of the tightening piece, the second end of the third screw is fixedly connected with the second end of the extension spring, and the second end of the second connecting column is rotatably connected with the first end of the flexible piece along the circumferential direction; or the second end of the third screw rod is rotatably connected with the second end of the extension spring along the circumferential direction, and the second end of the second connecting column is fixedly connected with the first end of the flexible part.

In a third possible implementation manner, the flatness of the curtain 24 is ensured by the cooperation of the first support rod and the base 21.

In some embodiments, an elastic tensioning mechanism is connected between the first supporting rod and the base 21, that is, a first end of the elastic tensioning mechanism is fixedly connected to the first supporting rod, a second end of the elastic tensioning mechanism is fixedly connected to the base 21, and the elastic tensioning mechanism is slidably supported at a connection portion (connection shaft) of the first supporting rod and the base 21.

In this way, based on the support of the base 21, the first support rod is tensioned through the elastic tensioning mechanism, so that the first support rod has a tendency to support, and further, the effective height of the first support rod and the second support rod supporting the cross beam has a tendency to increase, so that an additional supporting force is applied to the cross beam through the first support rod and the second support rod. The free length of the elastic tensioning mechanism can be adjusted, that is, the tensioning force of the elastic tensioning mechanism acting on the first supporting rod can be adjusted, so that the supporting force additionally exerted on the cross beam by the first supporting rod and the second supporting rod can be adjusted. Therefore, in the case where the supporting force applied to the cross member is adjustable, it is possible to ensure the uniformity of the supporting force applied to the cross member, that is, the uniformity of the tension force applied to the curtain 24 by the cross member, thereby ensuring the flatness of the curtain 24.

The structure of the elastic pulling-in mechanism is the same as or similar to the structure described above, and of course, may also be different from the structure described above, as long as the connection between the first supporting rod and the base 21 can be tightened, which is not limited in the embodiment of the present application.

In other embodiments, the lifting mechanism 23 includes a second connecting frame movably fixed on the base 21, the moving direction of the second connecting frame is parallel to the height direction of the curtain 24 when the curtain is unfolded, and the first end of the first supporting rod is rotatably connected to the second connecting frame.

Optionally, the base 21 has an oblong hole, a length direction of the oblong hole is parallel to a height direction of the curtain 24 when the curtain is unfolded, and the base 21 is connected to the second connection frame through the fixing bolt based on the oblong hole.

Like this, through fixing bolt's dismantlement, can make the second link drive first bracing piece and remove in the direction of height when curtain 24 expandes, fixing bolt removes in the slotted hole simultaneously to can fix second link and base 21 again through fixing bolt after guaranteeing the second link removal. When the first supporting rod is lifted or lowered, the second supporting rod is lifted or lowered synchronously, so that the supporting effect of the second supporting rod on the cross beam is adjusted, and the adjustment of the supporting force of the second supporting rod on the cross beam is facilitated.

It should be noted that, in addition to the connection between the second connecting frame and the base 21 in the above manner to raise or lower the first supporting rod, the first supporting rod can also be raised or lowered in other manners. For example, the height of the first support bar is adjusted by the second link frame itself to realize the raising or lowering of the first support bar.

Illustratively, the second link frame includes a fixed plate, a hinge plate, and a lifting column; the fixed plate is fixedly connected with the base 21, the hinged plate is rotatably connected with the first end of the first supporting rod, the first end of the lifting column is fixedly connected with the hinged plate, the second end of the lifting column penetrates through the fixed plate and is in limited connection, the length direction of the lifting column is parallel to the height direction of the curtain 24, and the distance between the fixed plate and the hinged plate is adjustable. Therefore, the hinge plate can be lifted by adjusting the distance between the fixing plate and the hinge plate, and the first supporting rod is lifted synchronously.

It should be noted that the flatness of the curtain 24 can also be ensured by combining the above two embodiments. That is, an elastic tensioning mechanism is connected between the first support rod and the base 21, and the first support rod is connected to the base 21 through a second connecting frame (the second connecting frame can adjust the height of the first support rod relative to the base 21), which is not limited in the embodiment of the present application.

It should be further noted that, as for the three manners of ensuring the flatness of the curtain 24, the flatness can be ensured by at least one of the three manners, that is, the flatness of the curtain 24 can be ensured by the three manners alone, or can be ensured by a combination of the first manner and the second manner, or by a combination of the first manner and the third manner, or by a combination of the second manner and the third manner, or by a combination of the first manner, the second manner and the third manner, which is not limited in the embodiment of the present application.

In this application embodiment, because the height of the tip of crimping mechanism can be adjusted to first link, and then the height of the first side of adjustment curtain for the rate of tension of curtain self changes, and elevating system is used in the rate of tension change of the second side of curtain like this. That is, the tension applied by the lift mechanism to the second side of the curtain varies with the height of the end of the winding mechanism. Therefore, under the condition that the tension force of the lifting mechanism acting on the second side edge of the curtain can be adjusted through the height of the end part of the curling mechanism, the homogenization of the tension force of the lifting mechanism acting on the curtain can be ensured, and the flatness of the curtain can be ensured.

The above description is only for the purpose of illustrating the preferred embodiments of the present application and is not intended to limit the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the scope of the present application.