CN217623227U - Backrest lock, seat and vehicle - Google Patents

Abstract

The present disclosure relates to a back lock, a seat and a vehicle, the back lock comprises a lock body, a locking plate and a driving piece; the locking plate rotatable coupling in the lock body, the locked groove that is used for holding the locking lever is seted up to the rotation axis department of locking plate, the rotation axis of locking plate can with the axis coincidence of locking lever, it is right to carry out radial direction's spacing with the locking lever, the driving piece with the locking plate is connected, in order to drive the locking plate rotates will the locking lever locking. This back lock sets up the locked groove through the axis of rotation department at the locking plate for the locking lever card is gone into the axis of rotation department that lies in the locking plate behind the locked groove, thereby realize radial spacing to the locking lever, the locking lever also can not produce centrifugal force to the locking plate when receiving the exogenic action, thereby can not lead to the locking plate to take place to rotate, consequently need not set up cam structure and come to restrict the locking plate, thereby reduced the volume of back lock, reduced the quantity of spare part, greatly reduced manufacturing cost.

Description

Backrest lock, seat and vehicle

Technical Field

The disclosure relates to the technical field of vehicle manufacturing, in particular to a backrest lock, a seat and a vehicle.

Background

The backrest lock is a device for locking a backrest of a seat of a vehicle so that the backrest of the seat can be selectively laid down.

The backrest lock of the related art mainly comprises a lock hook and a cam, locking is achieved through cooperation of the cam and the lock hook, and rotating shafts of the lock hook and the cam need to be arranged respectively, so that the backrest lock is large in size, and in addition, more parts are manufactured and assembled, and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

The purpose of this disclosure is to provide a backrest lock, a seat and a vehicle, in order to solve the problems of the prior art that the backrest lock is large in volume and high in manufacturing cost.

To achieve the above object, an aspect of the present disclosure provides a backrest lock including: a lock body, a lock plate and a driving piece;

the locking plate rotatable coupling in the lock body, the locked groove that is used for holding the locking lever is seted up to the rotation axis department of locking plate, the rotation axis of locking plate can with the axis coincidence of locking lever, it is right to carry out radial direction's spacing with the locking lever, the driving piece with the locking plate is connected, in order to drive the locking plate rotates will the locking lever locking.

Optionally, installation through-hole and opening have been seted up on the lock body, the locking plate is located in the installation through-hole, the opening with installation through-hole intercommunication, the opening is used for supplying the locking lever card is gone into the locked groove, the locking plate can rotate will the opening is sealed, the both ends of locking lever can stretch out installation through-hole.

Optionally, a limiting support part is formed on the inner hole wall of the mounting through hole, the limiting support part extends along the rotation stroke direction of the locking plate, an arc-shaped guide block is formed on the limiting support part, a sliding groove is formed in the locking plate, and the arc-shaped guide block is connected to the sliding groove in a sliding manner.

Optionally, the installation through-hole is the circular port, the locking plate is the semicircle dish-shaped, the periphery wall of locking plate with the interior pore wall contact of installation through-hole, the cross section of locking lever is circular, the locked groove is the semicircle recess, the outer wall of locking lever can with the cell wall contact of locked groove, just the locking lever with contact gap has between the locked groove, contact gap is 0.1-0.2mm.

Optionally, the inner hole wall of the installation through hole is close to the opening and is formed with a stopping portion, the stopping portion is located on the rotation stroke of the locking plate, and the stopping portion can abut against the locking plate to prevent the locking plate from rotating excessively.

Optionally, the back lock still includes the deblocking piece, the deblocking piece with the locking plate is connected, the deblocking piece is used for driving the locking plate antiport unlocks.

Optionally, the unlocking piece includes the cable, the first end of cable with the locking plate is connected, the second end of cable is used for being connected with the operating parts of vehicle, the driving piece includes the extension spring, the both ends of extension spring connect respectively in the lock body with the locking plate, the extension spring is used for the drive the locking plate rotates and resets.

Optionally, a first mounting block is formed on the lock body, a second mounting block is formed on the lock plate, a first end of the tension spring is connected to the first mounting block, and a second end of the tension spring is connected to the second mounting block.

Optionally, the back lock further includes a linkage locking mechanism, the linkage locking mechanism is connected to the lock body and the locking plate, the linkage locking mechanism can fix the locking plate, the linkage locking mechanism can contact with the locking rod, so that the locking plate is fixed.

Optionally, the backrest lock further comprises an upper cover, and the upper cover is connected to the lock body and covers the lock sheet.

A second aspect of the present disclosure also provides a seat comprising a seat cushion, a backrest and the backrest lock described above, the backrest lock being connected to a back surface of the backrest.

The third aspect of the present disclosure further provides a vehicle, which includes a vehicle body and the seat, wherein the vehicle body is provided with a lock rod, and the lock rod can be locked and matched with the backrest on the backrest.

Above-mentioned technical scheme, axis of rotation department through at the locking plate sets up the locked groove, make the locking lever card go into the axis of rotation department that is located the locking plate behind the locked groove, thereby realize radial spacing to the locking lever, the locking lever also can not produce centrifugal force to the locking plate when receiving the exogenic action, thereby can not lead to the locking plate to take place to rotate, consequently, the locking lever can continuously be restricted at the locked groove by the locking, consequently, need not set up the cam structure and come to limit the locking plate, thereby the volume of back lock has been reduced, the quantity of spare part has been reduced, greatly reduced manufacturing cost. This back lock adopts the axis of rotation position at the locking plate to set up the locked groove and carry on spacingly to the locking lever to the locking plate does not adopt the relative lock body of pivot to rotate, has reduced the vertical occupation space of back lock, has further reduced the volume of back lock, has reduced manufacturing cost.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:

figure 1 is a schematic structural view of a lock body of one embodiment of the present disclosure in an unlocked state;

figure 2 is a schematic structural view of a lock body of one embodiment of the present disclosure in a locked state;

FIG. 3 is a schematic perspective view of a back lock according to one embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a locking tab of one embodiment of the present disclosure;

fig. 5 is a schematic structural view of a linkage locking mechanism according to an embodiment of the present disclosure.

Description of the reference numerals

1. A lock body; 2. mounting a through hole; 3. an opening; 4. a lock lever; 5. a limiting support part; 6. an arc-shaped guide block; 7. a stopper portion; 8. a locking plate; 9. locking the groove; 10. a drive member; 11. an upper cover; 12. a first mounting block; 13. a second mounting block; 14. connecting holes; 15. a chute; 16. locking the opening; 17. a cable extending hole; 18. avoiding the notch; 19. a rotating wheel; 20. locking the gear; 21. a push rod; 22. a locking hook; 23. a return spring; 24. unlocking the lock.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" are generally defined in the direction of the drawing plane of the drawings, and "inner and outer" refer to the inner and outer of the relevant component parts. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present disclosure, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

As shown in fig. 1-5, one aspect of the present disclosure provides a backrest lock including: lock body 1, locking plate 8 and driver 10.

Locking plate 8 rotatable coupling is in lock body 1, and locking groove 9 that is used for holding locking lever 4 is offered to locking plate 8's rotation axis department, and locking plate 8's rotation axis can coincide with locking lever 4's axis to carry out radial direction's spacing to locking lever 4, driving piece 10 is connected with locking plate 8, in order to drive locking plate 8 and rotate 4 locking locks of locking lever.

Wherein, locking plate 8 can rotate relative to lock body 1, after locking lever 4 card is gone into locking groove 9 of locking plate 8, drives locking plate 8 along with driving piece 10 and rotates, can be with locking lever 4 locking.

Wherein, the locked groove 9 is located locking plate 8's axis of rotation department, make locking lever 4 can be located locking plate 8's axis of rotation department, thereby after locking lever 4 card is gone into locking groove 9, locking plate 8 is actually to rotate around locking lever 4's axis, locking plate 8 can not receive locking lever 4 to its centrifugal force that produces, thereby locking plate 8 can carry out radial direction's spacing to locking lever 4, consequently locking lever 4 can not produce the centrifugal force to locking plate 8 when receiving external force, consequently locking plate 8 also can not take place to rotate, thereby locking plate 8 can keep the locking state to locking lever 4, consequently, need not set up the cam structure and restrict locking plate 8, thereby the volume of back lock has been reduced, manufacturing cost is reduced.

In the present embodiment, since the lock groove 9 is located at the position of the rotation axis of the lock plate 8, the lock plate 8 may be connected to the lock body 1 by an arc-shaped sliding mechanism instead of a rotation axis. Therefore, the rotating shaft is not required to be arranged in the embodiment, the longitudinal occupied space of the backrest lock can be reduced, the size of the backrest lock is further reduced, and the manufacturing cost is reduced.

Among the above-mentioned technical scheme, axis of rotation department through at locking plate 8 sets up locked groove 9, make locking lever 4 card go into the axis of rotation department that is located locking plate 8 behind the locked groove 9, thereby realize radial spacing to locking lever 4, locking lever 4 also can not produce centrifugal force to locking plate 8 when receiving the exogenic action, thereby can not lead to locking plate 8 to take place to rotate, consequently locking lever 4 can continue to be restricted in locked groove 9 by the locking, consequently, need not set up the cam structure and come to restrict locking plate 8, thereby the volume of back lock has been reduced, the quantity of spare part has been reduced, greatly reduced manufacturing cost. This back lock adopts and sets up the locked groove 9 at the axis of rotation position of locking plate 8 and carry on spacingly to locking lever 4 to locking plate 8 does not adopt the relative lock body 1 of pivot to rotate, has reduced the vertical occupation space of back lock, has further reduced the volume of back lock, has reduced manufacturing cost.

Optionally, in an embodiment of the present disclosure, the lock body 1 is provided with an installation through hole 2 and an opening 3, the locking plate 8 is located in the installation through hole 2, the opening 3 is communicated with the installation through hole 2, the opening 3 is used for the locking rod 4 to be clamped into the locking groove 9, the locking plate 8 can rotate to seal the opening 3, and two ends of the locking rod 4 can extend out of the installation through hole 2.

In this embodiment, the installation through hole 2 penetrates through the lock body 1, and the locking plate 8 can rotate in the installation through hole 2 along the inner hole wall of the installation through hole 2. Alternatively, the inner hole wall of the installation through hole 2 can be connected with the outer wall of the locking plate 8 by adopting an arc-shaped sliding mechanism. The locking plate 8 is accommodated through the arranged installation through hole 2, so that the locking plate 8 rotates in the lock body 1, the occupation in the longitudinal space can be further reduced, and the size of the backrest lock is reduced.

Wherein, in this embodiment, opening 3 is linked together with installation through-hole 2 to guarantee that locking lever 4 can block into the locked groove 9, installation through-hole 2 can also be stretched out to the both ends of locking lever 4 simultaneously, thereby does not influence the card of locking lever 4 and goes into. The locking rod 4 can move into the mounting through hole 2 through the opening 3 and further be clamped into the locking groove 9, and locking of the locking rod 4 can be achieved.

It will be appreciated that when the locking tab 8 is rotated to close the opening 3, the locking bar 4 cannot be removed from the lock body 1 through the opening 3, and the locking bar 4 is locked by the locking tab 8, with the backrest lock in the locked state. When the locking plate 8 is rotated to the state that the locking groove 9 is communicated with the opening 3, the locking rod 4 can be moved out of the lock body 1, and the backrest lock is in an unlocking state.

Alternatively, in other embodiments of the present disclosure, the locking plate 8 may be directly attached to the outer surface of the lock body 1, and the locking function of the locking rod 4 may be achieved as well.

Optionally, in an embodiment of the present disclosure, a limiting support portion 5 is formed on an inner hole wall of the installation through hole 2, the limiting support portion 5 extends along a rotation stroke direction of the locking plate 8, an arc-shaped guide block 6 is formed on the limiting support portion 5, a sliding groove 15 is formed on the locking plate 8, and the arc-shaped guide block 6 is slidably connected to the sliding groove 15.

Wherein, among this embodiment, limit support portion 5 sets up along the radial direction of mounting hole 2, and limit support portion 5 is fan-shaped, and the axle center position of limit support portion 5 is used for dodging locking lever 4 for locking lever 4 can block into the locked groove 9, and limit support portion 5's surface is used for supporting locking plate 8, makes locking plate 8 fix in mounting hole 2, can not break away from mounting hole 2, and limit support portion 5 is along the rotation stroke direction extension of locking plate 8.

It can be understood that no matter whether the locking piece 8 rotates forward or backward, the locking piece 8 is at least partially supported on the limit support part 5 through the limit support part 5.

Wherein, in this embodiment, arc guide block 6 is located spacing supporting part 5 towards the one side of locking plate 8, and arc guide block 6 extends along spacing supporting part 5's length direction, and arc guide block 6 is used for leading to the slip direction of locking plate 8, and arc guide block 6 can slide in spout 15 to locking plate 8 rotates along the direction of arc guide block 6, realizes locking and unblock.

Can guarantee locking plate 8 internal rotation in installation through-hole 2 through spacing supporting part 5 and the arc guide block 6 that set up, can not set up the pivot and support locking plate 8's rotation. It will be appreciated that the arc-shaped sliding mechanism described above includes the limit support portion 5 and the arc-shaped guide block 6, thereby allowing the locking piece 8 to rotate in the mounting through hole 2 without providing a rotating shaft. Of course, the arc-shaped sliding mechanism can also be an arc-shaped sliding rail and a sliding seat, the sliding seat is connected to the arc-shaped sliding rail, the arc-shaped sliding rail is connected to the inner hole wall of the installation through hole 2, and the peripheral wall of the locking plate 8 is connected to the sliding seat.

Optionally, in an embodiment of the present disclosure, the installation through hole 2 is a circular hole, the locking plate 8 is a semicircular disk, the outer circumferential wall of the locking plate 8 contacts with the inner hole wall of the installation through hole 2, the cross section of the locking rod 4 is circular, the locking groove 9 is a semicircular groove, the outer wall of the locking rod 4 can contact with the groove wall of the locking groove 9, and a contact gap is formed between the locking rod 4 and the locking groove 9, and the contact gap is 0.1-0.2mm.

Wherein, in this embodiment, locking plate 8 can laminate and rotate at the inner hole wall of installation through-hole 2, through designing locking plate 8 for half disc, installation through-hole 2 designs for the circular port, can do benefit to locking plate 8 at 2 internal rotations of installation through-hole to reduce the frictional force that the rotation produced, improve the smooth degree of back lock when switching between the unblock state and locking state the two.

Wherein, locking lever 4 designs for circular rod, and its cross section is circular, and locked groove 9 is the semicircle recess for half of locking lever 4 can be gone into the locked groove 9 in, and locked groove 9 laminates and rotates on the periphery wall of locking lever 4, thereby has guaranteed the limiting displacement to the radial direction of locking lever 4, makes locking lever 4 fixed in locked groove 9, the condition of rocking of radial direction can not appear, has guaranteed locking effect. And the locking lever 4 has the contact clearance with the locked groove 9, the contact clearance is 0.1-0.2mm, can guarantee the rotation action between locking plate 8 and the locking lever 4, avoid appearing unable pivoted condition, can also fill lubricating grease in removing the clearance simultaneously, can guarantee that locking plate 8 rotates relative to locking lever 4.

Optionally, in an embodiment of the present disclosure, a stopping portion 7 is formed at a position, close to the opening 3, of an inner hole wall of the mounting through hole 2, the stopping portion 7 is located on a rotation stroke of the locking plate 8, and the stopping portion 7 can abut against the locking plate 8 to prevent the locking plate 8 from rotating excessively.

In the present embodiment, the stopping portion 7 is located in the mounting through hole 2, and the stopping portion 7 is used for abutting against the locking plate 8. The stop portion 7 is located on a rotation stroke of the locking plate 8 during locking. Specifically, the stopper portion 7 is integrally formed on the inner hole wall of the mounting through hole 2.

It can be understood that, when the driving piece 10 drives the locking plate 8 to rotate, after the one end of the locking plate 8 rotates through the opening 3, the locking plate 8 seals the opening 3, and the one end of the locking plate 8 supports the top with the stopping portion 7 at this moment, so as to avoid the locking plate 8 from exposing the opening 3 again after rotating excessively, thereby affecting the locking effect.

Optionally, in an embodiment of the present disclosure, the backrest lock further includes an unlocking member 24, the unlocking member 24 is connected to the lock plate 8, and the unlocking member 24 is configured to drive the lock plate 8 to rotate reversely to unlock.

Wherein, in this embodiment, unlocking piece 24 and driving piece 10 play opposite effect, and unlocking piece 24 is used for driving locking plate 8 and carries out the antiport, can realize the unblock for the back lock is in the unblock state, and locking lever 4 can be taken out from locked groove 9 this moment, when driving piece 10 drives locking plate 8 and carries out forward rotation, can make locking plate 8 with locking lever 4 locking, makes the back lock be in the lock state.

When the unlocking piece 24 drives the locking piece 8 to rotate reversely for unlocking, one end of the locking piece 8 is separated from the stopping part 7.

Optionally, in an embodiment of the present disclosure, the unlocking member 24 includes a pulling cable, a first end of the pulling cable is connected to the locking plate 8, a second end of the pulling cable is used for being connected to an operating member of the vehicle, the driving member 10 includes a tension spring, two ends of the tension spring are respectively connected to the lock body 1 and the locking plate 8, and the tension spring is used for driving the locking plate 8 to rotate and reset.

In the present embodiment, the pulling cable is used to generate a pulling force, and the pulling force acts on the locking plate 8 to form a centrifugal force, so that the locking plate 8 rotates. The second end of the inhaul cable can be connected with an operating part of the vehicle, so that the operating part on the vehicle can be manually operated to achieve pulling unlocking. Of course, the operating member on the vehicle can also be electrically driven, and only corresponding operation, such as key operation or voice operation, needs to be performed on the vehicle without manual pulling.

Optionally, a connecting hole 14 is formed in the locking piece 8, and the first end of the cable can be connected to the connecting hole 14.

In this embodiment, the driving member 10 is a tension spring, and the tension spring can be extended and retracted.

It can be understood that when the locking piece 8 is pulled by the pulling cable to rotate to the unlocking state, the tension spring is in the stretching state. When the pull rope is loosened, the tension spring retracts to drive the locking plate 8 to rotate for resetting, so that the locking plate 8 stops rotating after being rotated to be in contact with the stopping part 7.

It should be noted that, when the lock rod 4 is clamped into the lock groove 9 of the lock plate 8, the cable needs to be operated first to rotate the lock plate 8 to the unlocking state, then the lock rod 4 is clamped into the lock groove 9 of the lock plate 8, and the cable is released to lock the lock rod 4.

Alternatively, in other embodiments of the present disclosure, the unlocking member 24 may be a transmission rod, a first end of which is connected to the locking plate 8 and a second end of which is adapted to be connected to an operating member of the vehicle. The driving member 10 may be a torsion spring, two ends of the torsion spring are respectively connected to the lock body 1 and the locking plate 8, and a twisting axis of the torsion spring coincides with a rotation axis of the locking plate 8. Of course, the driving member 10 may be other devices, such as a motor, to realize an electric lock.

Optionally, in an embodiment of the present disclosure, the lock body 1 is formed with a first mounting block 12, the lock plate 8 is formed with a second mounting block 13, a first end of the tension spring is connected to the first mounting block 12, and a second end of the tension spring is connected to the second mounting block 13.

Wherein, the first end hook of extension spring is established on first installation piece 12, and the second end hook of extension spring is established on second installation piece 13 to can realize being connected of extension spring and lock body 1 and locking plate 8.

Optionally, in an embodiment of the present disclosure, the backrest lock further includes a linkage locking mechanism, the linkage locking mechanism is connected to the lock body 1 and the locking plate 8, the linkage locking mechanism can fix the locking plate 8, and the linkage locking mechanism can contact with the locking rod 4 to release the locking plate 8.

In the embodiment, the linkage locking mechanism can fix the locking plate 8 when the locking plate 8 is pulled to the unlocking state by stretching, and after the locking rod 4 is clamped into the locking groove 9 of the locking plate 8, the locking plate 8 can contact with the linkage locking mechanism, so that the locking plate 8 is fixed, and at this time, the driving piece 10 can drive the locking plate 8 to rotate to lock the locking rod 4.

Optionally, in an embodiment of the present disclosure, the linkage locking mechanism includes a rotating wheel 19, a locking hook 22, a pushing rod 21 and a return spring 23, the rotating wheel 19 is rotatably connected to the lock body 1, the rotating wheel 19 has a locking gear 20 thereon, the locking hook 22 is connected to the pushing rod 21, and an end of the locking hook 22 away from the pushing rod 21 can be snapped into the gear teeth of the locking gear 20 to fix the locking gear 20. The cable is wound around the pulley 19, and when the cable is pulled, the pulley 19 follows the rotation. The return spring 23 is sleeved on the push rod 21, the push rod 21 is slidably connected to the lock body 1, and one end of the push rod 21, which is far away from the locking hook 22, extends to the locking groove 9 for contacting with the locking rod 4.

After the locking rod 4 is clamped into the locking groove 9, the locking rod 4 contacts with the pushing rod 21 to drive the pushing rod 21 to slide, so that the locking hook 22 is separated from the locking gear 20, the rotating wheel 19 can rotate at the moment, and the cable can move. When the lock rod 4 is separated from the push rod 21, the return spring 23 drives the push rod 21 to slide back, so that the locking hook 22 is contacted with the locking gear 20, the rotating wheel 19 is fixed, the cable is fixed, and the lock plate 8 is fixed.

The locking of the cable is enabled by the locking hook 22 and the locking gear 20, so that the operation is very convenient when the locking rod 4 needs to be locked.

Optionally, in an embodiment of the present disclosure, the backrest lock further includes an upper cover 11, and the upper cover 11 is connected to the lock body 1 and covers the lock plate 8.

In the present embodiment, the upper cover 11 is connected to the lock body 1, and the locking piece 8, the driving piece 10, and the unlocking piece 24 are covered by the upper cover 11. Specifically, the upper cover 11 is provided with a locking notch 16, and the locking notch 16 is communicated with the mounting through hole 2, so that the locking rod 4 can be clamped into the locking groove 9 of the locking plate 8. Still seted up the cable on the upper cover 11 and stretched out hole 17, the cable stretches out outside hole 17 extends to upper cover 11 through the cable, and the convenience is connected with the operating parts on the vehicle.

Optionally, in an embodiment of the present disclosure, a plurality of limiting columns are formed on the upper cover 11, the limiting columns can ensure that the locking plate 8 is located in the installation through hole 2, the locking plate 8 is prevented from falling out from the installation through hole 2, a contact gap is formed between each limiting column and the locking plate 8, and grease is smeared at the contact gap.

Optionally, in an embodiment of the present disclosure, an escape notch 18 for escaping the lock rod 4 may be further formed on the lock plate 8, so that the lock rod 4 can be better snapped into the lock groove 9.

A second aspect of the present disclosure also provides a seat comprising a seat cushion, a backrest and the backrest lock described above, the backrest lock being connected to the back of the backrest, the backrest being hinged to the seat cushion, the backrest being capable of being reclined.

It will be appreciated that when the back is to be reclined, the back lock is unlocked so that the locking bar 4 is moved out of the lock body 1, at which point the back can be reclined as desired. When the backrest does not need to be laid down, the backrest is rotated until the lock rod 4 is clamped into the lock body 1 of the backrest lock, and the backrest is locked.

The third aspect of the present disclosure also provides a vehicle, which includes a vehicle body and the seat described above, wherein the vehicle body is provided with a lock rod 4, and the lock rod 4 can be in lock fit with a backrest on the backrest.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (12)

1. A backrest lock, comprising: a lock body, a lock plate and a driving piece;

the locking plate rotatable coupling in the lock body, the locked groove that is used for holding the locking lever is seted up to the rotation axis department of locking plate, the rotation axis of locking plate can with the axis coincidence of locking lever, it is right to carry out radial direction's spacing with the locking lever, the driving piece with the locking plate is connected, in order to drive the locking plate rotates will the locking lever locking.

2. The backrest lock according to claim 1, wherein the lock body is provided with an installation through hole and an opening, the locking plate is located in the installation through hole, the opening is communicated with the installation through hole, the opening is used for the locking rod to be clamped into the locking groove, the locking plate can rotate to seal the opening, and two ends of the locking rod can extend out of the installation through hole.

3. The backrest lock according to claim 2, wherein a limiting support part is formed on the inner hole wall of the mounting through hole, the limiting support part extends along the rotation stroke direction of the locking plate, an arc-shaped guide block is formed on the limiting support part, a sliding groove is formed on the locking plate, and the arc-shaped guide block is slidably connected to the sliding groove.

4. The backrest lock according to claim 2, wherein the installation through hole is a circular hole, the locking plate is a semicircular disk, the outer peripheral wall of the locking plate is in contact with the inner hole wall of the installation through hole, the cross section of the locking rod is circular, the locking groove is a semicircular groove, the outer wall of the locking rod can be in contact with the groove wall of the locking groove, and a contact gap is formed between the locking rod and the locking groove, and the contact gap is 0.1-0.2mm.

5. The backrest lock of claim 2, wherein a stopping portion is formed on the inner hole wall of the mounting through hole near the opening, the stopping portion is located on the rotation stroke of the lock plate, and the stopping portion can abut against the lock plate to prevent the lock plate from rotating excessively.

6. A back lock according to any one of claims 1-5, further comprising an unlocking member connected to the locking plate for driving the locking plate to rotate in the reverse direction for unlocking.

7. The backrest lock of claim 6, wherein the unlocking member comprises a pulling cable, a first end of the pulling cable is connected with the locking plate, a second end of the pulling cable is used for being connected with an operating part of a vehicle, the driving part comprises a tension spring, two ends of the tension spring are respectively connected with the lock body and the locking plate, and the tension spring is used for driving the locking plate to rotate and reset.

8. The back lock of claim 7, wherein the lock body defines a first mounting block, the lock plate defines a second mounting block, the tension spring has a first end coupled to the first mounting block and a second end coupled to the second mounting block.

9. The back lock according to any one of claims 1-5, further comprising a linkage locking mechanism connected to the lock body and the locking plate, the linkage locking mechanism capable of securing the locking plate, the linkage locking mechanism capable of contacting the locking bar to unseat the locking plate.

10. The back lock of any one of claims 1-5, further comprising an upper cover coupled to the lock body and disposed over the lock plate.

11. A seat comprising a seat cushion, a backrest and a backrest lock as claimed in any one of claims 1 to 10, said backrest lock being connected to a back surface of said backrest.

12. A vehicle comprising a body and a seat as claimed in claim 11, the body being provided with a locking bar which is able to lockingly engage with the backrest on the backrest.

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