阅读说明：本技术 带状态指示功能的锁机构 (Lock mechanism with state indicating function ) 是由 项文广 李乾兴 周燕义 卫斯凡 邵建局 于 2021-10-25 设计创作，主要内容包括：本发明涉及一种带状态指示功能的锁机构,包括壳体、盖以及指示器,指示器包括沿中心轴线周向布置的主动指示器和被动指示器,主动指示器具有沿中心轴线周向方向延伸的凸轮配合面以及位于凸轮配合面对应在主动指示器枢装中心一端的止位端部,径向侧凸部沿凸轮配合面滑动,以促使主动指示器围绕凸起枢转离开盖的中心轴线,径向侧凸部推压主动指示器的止位端部并促使主动指示器绕凸起枢转至指示部分经盖覆盖的回收位置,被动指示器与主动指示器经齿传动装置联动连接,以使得被动指示器随主动指示器同步展开和收拢。具有结构简单,装配方便以及结构稳定的优点。(The invention relates to a lock mechanism with a state indicating function, which comprises a shell, a cover and an indicator, wherein the indicator comprises an active indicator and a passive indicator which are circumferentially arranged along a central axis, the active indicator is provided with a cam matching surface extending along the circumferential direction of the central axis and a stop end part positioned at one end of the cam matching surface corresponding to the pivot mounting center of the active indicator, a radial side projection slides along the cam matching surface to enable the active indicator to pivot away from the central axis of the cover around a projection, the radial side projection pushes the stop end part of the active indicator and enables the active indicator to pivot to a recovery position where an indicating part is covered by the cover around the projection, and the passive indicator is in linkage connection with the active indicator through a tooth transmission device so that the passive indicator can be synchronously unfolded and folded along with the active indicator. Has the advantages of simple structure, convenient assembly and stable structure.)

1. A lock mechanism with status indicating function comprising a housing, a cover having a central axis and mounted for rotational movement relative to the housing about the central axis between a latched position and an unlatched position, an indicator interposed between the cover and the housing, the indicator having an indicating portion in covering relation with the cover, the indicator being pivotally mounted on the housing about a projection, the indicator moving radially outward from the central axis relative to the cover when the cover is rotated from the latched position to the unlatched position such that the indicating portion of the indicator is no longer in covering relation with the cover, the cover being provided with radially extending radial side tabs that rotate with the cover about the central axis, the lock mechanism characterized in that: the indicator comprises an active indicator and a passive indicator which are circumferentially arranged along a central axis, the active indicator is provided with a cam matching surface extending along the circumferential direction of the central axis and a stop end part which is positioned at one end of the cam matching surface corresponding to the pivot mounting center of the active indicator, a radial side projection slides along the cam matching surface to enable the active indicator to pivot away from the central axis of the cover around the protrusion, the radial side projection pushes the stop end part of the active indicator and enables the active indicator to pivot to a recovery position where an indicating part is covered by the cover around the protrusion, and the passive indicator is in linkage connection with the active indicator through a tooth transmission device to enable the passive indicator to be synchronously unfolded and folded along with the active indicator.

2. The status indicating lock mechanism of claim 1, wherein: passive indicator and active indicator are along central axis circumference extension, passive indicator is close to each other around the pivoted distal end of active indicator pivot dress center with active indicator around the pivoted distal end of active indicator pivot dress center, and the lid is followed the latch position is rotatory extremely during the unblock position, but radial side cam matching face of slideing and getting into passive indicator position, be equipped with on the passive indicator and follow the face of stepping down of central axis circumference extension, this face of stepping down supplies radial side cam to slide into passive indicator position, and the face of stepping down corresponds the cooperation with radial side cam and keeps keeping in the central axis's that leaves the lid around protruding pivot under radial side cam conflict expansion position.

3. The status indicating lock mechanism of claim 2, wherein: the passive indicator is connected with a stop part at one end of the abdicating surface close to the pivot mounting center of the passive indicator, and the stop part is abutted against the radial side convex part, so that the limit of the unlocking rotation direction limit position of the cover is formed.

4. The status indicating lock mechanism of claim 2, wherein: the gear transmission device comprises a first meshing gear formed on the active indicator and rotating around the pivot center of the active indicator, and a second meshing gear formed on the passive indicator and rotating around the pivot center of the passive indicator, wherein the first meshing gear and the second meshing gear are in meshing transmission.

5. The status indicating lock mechanism of claim 1, wherein: the shell is provided with a disc-shaped top and a positioning shaft hole penetrating through the disc-shaped top, the cover comprises a shielding ring opposite to the disc-shaped top and a shaft axially extending from the shielding ring, the cover is in positioning fit in the positioning shaft hole through the shaft, the shielding ring and the disc-shaped top form an interval for accommodating the indicator, and the radial side protrusion is positioned in the interval.

Technical Field

The present invention relates to a lock mechanism, and more particularly to a lock mechanism capable of indicating the state of a lock.

Background

In some applications, it is desirable to know whether the mechanism is in a latched or unlatched state. For example, the locks used to secure the doors of a compartment of a coach or train may be checked prior to initiating a trip. If the lock is not properly locked, luggage belonging to the passenger may be accidentally lost if the door is opened during transport, or stolen during travel if the storage compartment is not properly secured and unattended.

To solve the above problems, a lock having a status display function is designed and applied. "latch mechanism with status indicator" as disclosed in the chinese patent application No. CN 201780000951.0 by sosco, having a cover mountable to a housing for rotation about a central axis between a latched position and an unlatched position, an indicator interposed between the cover and the housing, for ease of use, typically two symmetrically designed indicators in practical use, the indicator being in covering relation with the cover, the indicator being mounted to the cover for rotation with the cover, and a guide structure (recess 46 in the document) provided on the housing such that upon rotation of the cover, the indicator is guided by the guide structure to expand to a covering position at least partially protruding out of the cover and contract to a covered state by the cover, thereby achieving a status indication function; according to the scheme, in order to ensure the stable operation of the indicator, the manufacturing process and the corresponding assembly of the groove guide driven accessory adopting the groove guide structure design are complex. The second embodiment of the document also discloses a mounting structure that the indicator is pivoted on the shell and does not rotate along with the cover, but the mounting structure has the defects of limited rotation angle of the lock or/and poor structural stability of the indicator.

Disclosure of Invention

The invention aims at: in order to overcome the defects in the prior art, the invention provides the lock mechanism with the state indicating function, which has the advantages of simple structure, convenience in assembly and stable structure.

In order to achieve the purpose, the invention provides the following technical scheme:

a lock mechanism with status indicating function comprising a housing, a cover having a central axis and mounted for rotational movement relative to the housing about the central axis between a latched position and an unlatched position, an indicator interposed between the cover and the housing, the indicator having an indicating portion in covering relation with the cover, the indicator being pivotally mounted on the housing about a projection, the indicator moving radially outward from the central axis relative to the cover when the cover is rotated from the latched position to the unlatched position such that the indicating portion of the indicator is no longer in covering relation with the cover, the cover being provided with radially extending radial side tabs that rotate with the cover about the central axis, the lock mechanism characterized in that: the indicator comprises an active indicator and a passive indicator which are circumferentially arranged along a central axis, the active indicator is provided with a cam matching surface extending along the circumferential direction of the central axis and a stop end part which is positioned at one end of the cam matching surface corresponding to the pivot mounting center of the active indicator, a radial side projection slides along the cam matching surface to enable the active indicator to pivot away from the central axis of the cover around the protrusion, the radial side projection pushes the stop end part of the active indicator and enables the active indicator to pivot to a recovery position where an indicating part is covered by the cover around the protrusion, and the passive indicator is in linkage connection with the active indicator through a tooth transmission device to enable the passive indicator to be synchronously unfolded and folded along with the active indicator.

By adopting the technical scheme, when the cover rotates from the latching position to the unlocking position, the radial side convex part slides along the cam matching surface of the active indicator to promote the active indicator to pivot around the convex part to be separated from the central axis of the cover, the indicating part gradually extends out and is not in covering relation with the cover any more, and meanwhile, the active indicator drives the passive indicator to synchronously act through the tooth transmission device, so that the active indicator and the passive indicator are synchronously unfolded to achieve reliable indication; the radial side convex part is matched with the cam matching surface and the stop end part on the active indicator to achieve the unfolding and folding of the driving indicator, the structure is simple, the processing and forming are convenient, the reliable matching can be formed, the assembly operation is convenient, the indicator adopts the design of the active indicator and the passive indicator which realize the associated action through the tooth transmission device, the reliable indication can be provided, the active indicator and the passive indicator which are associated with each other can be mutually drawn, the anti-loosening of the structure is realized, and the mechanism is stable and reliable.

Preferably, passive indicator and active indicator are along central axis circumference extension, passive indicator is close to each other around the pivoted distal end of passive indicator pivot dress center and active indicator around the pivoted distal end of active indicator pivot dress center, be equipped with the edge on the passive indicator the face of stepping down of central axis circumference extension, the lid is followed the latch position is rotatory to when the unblock position, but radial side cam matching face of roll-off and the face of stepping down that gets into passive indicator are located, and the face of stepping down corresponds the cooperation with radial side cam and keeps in the expansion position of the central axis of leaving the lid around protruding pivot under radial side cam conflict. Under this structural design, can make on the passive indicator form with the initiative indicator cam fitting surface link up in order to supply radial side convex part to slide in and the abdication face of roll-off passive indicator position, radial side convex part can revolve and leave the initiative indicator and get into passive indicator position, enlarges the lid and is in the latching position reaches the rotation angle range value of unblock position realizes more nimble angle design, and the abdication face on the passive indicator offsets the restriction through radial side convex part to when guaranteeing that the lid is in non-latching position, initiative indicator and passive indicator are in the state of expanding all the time.

Preferably, the passive indicator is engaged with a stopper portion at an end of the receding surface close to a pivot center of the passive indicator, and the stopper portion abuts against the radial side protrusion, thereby defining an unlocking rotation direction limit position of the cover. Under this structural design, the lid realizes the position by passive indicator restriction and prescribes a limit, simple structure, and the cooperation is reliable.

Preferably, one end of the passive indicator installation pivot protrusion is close to one end of the active indicator installation pivot protrusion, the tooth transmission device comprises a first meshing tooth formed on the active indicator and rotating around a pivot center of the active indicator, and a second meshing tooth formed on the passive indicator and rotating around a pivot center of the passive indicator, and the first meshing tooth and the second meshing tooth are in meshing transmission. Under this structural design, transmission simple structure, assembly and job stabilization are reliable.

Preferably, the housing has a disc-shaped top and a positioning shaft hole penetrating through the disc-shaped top, the cover includes a shielding ring opposite to the disc-shaped top and a shaft axially extending from the shielding ring, the cover is positioned and fitted in the positioning shaft hole via the shaft, the shielding ring and the disc-shaped top form a space for accommodating the indicator, and the radial side protrusion is located in the space. Under this structural design, the cooperation simple structure of casing and lid, and make things convenient for the installation of inserting of indicator, overall structure is simple compact.

The invention is further described below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a latch mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a lock mechanism in an unlocked state in accordance with an embodiment of the present invention;

FIG. 3 is an exploded view of a lock mechanism according to an embodiment of the present invention;

FIG. 4 is an axial cross-sectional view of a lock mechanism according to an embodiment of the present invention;

FIG. 5 is a view of the radial protrusions of the cover and the indicator in a fully collapsed position according to an embodiment of the present invention;

FIG. 6 is a view of the indicator in a fully collapsed state with the upper radial protrusion initially driving the indicator to deploy after the cover has rotated a certain angle in accordance with an embodiment of the present invention;

FIG. 7 is a view of the radial protrusion of the indicator shown in the passive indicator position after deployment in accordance with an embodiment of the present invention;

fig. 8 is a view of the radial side projection of the cover in engagement with the indicator with the lock mechanism unlocked in accordance with an embodiment of the present invention.

Detailed Description

Referring to fig. 1-8, the present invention discloses a lock mechanism with status indicating function, comprising a housing 1, a cover 2 and an indicator 3, the cover 2 having a central axis 21 and being mounted for rotational movement relative to the housing 1 about the central axis between a latched position and an unlatched position, the indicator 3 being interposed between the cover 1 and the housing 2, the indicator 3 having an indicating portion 31 in covering relation with the cover 1, the indicator 3 being pivotally mounted on the housing 1 about a projection 11, the indicator 3 being radially outwardly moved relative to the cover 2 from the central axis 21 upon rotation of the cover 2 from the latched position to the unlatched position such that the indicating portion 31 of the indicator 3 is no longer in covering relation to the cover; the cover corresponds to the unlocking and latching actions of the lock mechanism, when the cover 2 rotates from the latching position to the unlocking position, the indicator 3 is driven to rotate around a protrusion 11, the protrusion 11 can be a pin-shaped structure integrally formed on the shell 1 (for convenience of forming and mounting, the mode is preferred in the embodiment), or a pin assembled on the shell, or the pin-shaped structure integrally formed on the indicator, the indicator is unfolded, and the indicating part is not covered by the cover any more; the cover 2 is provided with a radial side convex part 22 which extends along the radial direction and rotates with the cover 2 around a central axis 21, the indicator 3 comprises an active indicator 3a and a passive indicator 3b which are arranged along the circumference of the central axis 21, the active indicator 3a is provided with a cam matching surface 3a-1 which extends along the circumference of the central axis 21 and a stop end part 3a-2 which is positioned at one end of the cam matching surface 3a-1 corresponding to the pivot center of the active indicator 3a, the radial side convex part 22 slides along the cam matching surface 3a-1 to cause the active indicator 3a to pivot away from the central axis 21 of the cover 2 around the bulge, the radial side convex part 22 pushes the stop end part 3a-2 of the active indicator 3a and causes the active indicator 3a to pivot around the bulge to a recovery position (shown in figure 5) that the indicating part 31 is covered by the cover 2, and the passive indicator 3b is linked with the active indicator 3a through a gear transmission device, so that the passive indicator 3b is unfolded and folded synchronously with the active indicator 3 a. As shown in fig. 5 to 8, as the lid is rotated from the latched position to the unlatched position, the radial side projection 22 slides along the cam engagement surface of the active indicator 3a to urge the active indicator to pivot away from the central axis of the lid about the projection, and the indicating portion gradually projects out and is no longer in covering relation with the lid, and at the same time, the active indicator drives the passive indicator to synchronously act through the tooth transmission device, so that the passive indicator and the active indicator are synchronously deployed to achieve reliable indication; when the cover rotates in the opposite direction, the passive indicator and the active indicator can be synchronously folded; when the active indicator and the passive indicator are initially unfolded, the rotating angle of the cover towards the unlocking direction can be adjusted according to needs, if the cover is rotated towards the unlocking direction to start, the indicator is driven to rotate and unfold, or if the cover is rotated for a certain angle, for example, after 15 degrees (as shown in fig. 5-8), the indicator is driven to unfold; when the active indicator is initially unfolded to reach a fully unfolded state, the angle of the cover rotating towards the unlocking direction can be adjusted according to the requirement; the radial side convex part is matched with the cam matching surface and the stop end part on the active indicator to achieve the unfolding and folding of the driving indicator, the structure is simple, the processing and forming are convenient, the reliable matching can be formed, the assembly operation is convenient, the indicator adopts the design of the active indicator and the passive indicator which realize the associated action through the tooth transmission device, the reliable indication can be provided, the active indicator and the passive indicator which are associated with each other can be mutually drawn, the anti-loosening of the structure is realized, and the mechanism is stable and reliable. As disclosed in the prior art, the cover may be configured to receive a driver that transitions the cover from the latched position to the unlatched position. The driver is used to actuate the lock mechanism between the latched and unlatched states. The radial side projections 22 are preferably configured as a cam shape with a curved transition between the radial projection and the base circle.

The passive indicator 3b and the active indicator 3a both extend along the circumferential direction of a central axis 21, the far end 3b-3 of the passive indicator 3b rotating around the pivot mounting center of the passive indicator 3b and the far end 3a-3 of the active indicator 3a rotating around the pivot mounting center of the active indicator 3a are close to each other, so that one end of the active indicator and the passive indicator far away from the pivot mounting center of the active indicator and the passive indicator are in an openable and foldable state, the passive indicator 3b is provided with a yielding surface 3b-1 extending along the circumferential direction of the central axis 21, so that the radial side protrusion 22 slides along the cam matching surface 3a-1, after the active indicator and the passive indicator are synchronously opened, the yielding surface 3b-1 can bear the radial side protrusion 22, and when the cover 2 rotates from the latching position to the unlocking position, the radial side protrusion 22 can slide out of the cam matching surface 3a-1 and enter the yielding surface of the passive indicator 3b 3b-1, the relief surface 3b-1 cooperates with the radial side projection 22 to constitute a passive indicator 3b held in the extended position pivoted away from the central axis 21 of the cover 2 about the projection, against the radial side projection 22. The passive indicator can be enabled to form a yielding surface which is connected with a cam matching surface on the active indicator to enable the radial side convex part to slide in and out of the position of the passive indicator, the radial side convex part can be screwed out of the active indicator to enter the position of the passive indicator, the rotating angle range value of the cover from the latching position to the unlocking position is enlarged, more flexible angle design is realized, the yielding surface on the passive indicator is limited by the radial side convex part in a propping mode, and therefore when the cover is located at a non-latching position, the active indicator and the passive indicator are always in an unfolding state.

The invention mainly aims at limiting the limit position of the cover towards the unlocking direction, the limit position of the cover towards the unlocking direction can be limited by an external limiting structure, for the convenience of limiting, the passive indicator 3b is connected with a stop part 3b-2 at one end of a abdicating surface 3b-1 close to the pivot mounting center of the passive indicator 3b, and the stop part 3b-2 is abutted with a radial side convex part 22, so that the limit position of the unlocking rotation direction of the cover 2 is limited. The cover is limited by the passive indicator to realize position limitation, and the structure is simple and the matching is reliable.

The passive indicator 3b is arranged at one end of the pivot lug and is close to one end of the pivot lug arranged on the active indicator 3a, the tooth transmission device comprises first meshing teeth 3a-4 formed on the active indicator 3a and rotating around the pivot center of the active indicator 3a, and second meshing teeth 3b-4 formed on the passive indicator 3b and rotating around the pivot center of the passive indicator 3b, and the first meshing teeth 3a-4 are in transmission with the second meshing teeth 3 b-4. The transmission structure is simple, and the assembly and the work are stable and reliable. Of course, a combination of gears can be used to achieve linkage between the active and passive indicators regardless of the distance of the transmission.

The lock mechanism may be provided as various types of latches, such as a simple cam lock, created in accordance with the present invention and incorporating existing technology. One end of the shell 1 is provided with a disc-shaped top part 12 and a positioning shaft hole 13 penetrating through the disc-shaped top part, the cover 2 comprises a shielding ring 23 opposite to the disc-shaped top part and a shaft 24 axially extending from the shielding ring 23, the cover 2 is positioned and matched in the positioning shaft hole 13 through the shaft 24, the shielding ring 23 and the disc-shaped top part 12 form a space 4 for accommodating an indicator, a radial side convex part 22 is formed on one end surface of the shielding ring 23 corresponding to the space 4, and the radial side convex part 22 is positioned in the space 4. The matching structure of the shell and the cover is simple, the indicator can be conveniently inserted and installed, and the overall structure is simple and compact.