WO2009049532A1

WO2009049532A1 - Self-locking structure for seat backrest folding

Info

Publication number: WO2009049532A1
Application number: PCT/CN2008/072621
Authority: WO
Inventors: Jian Lu; Wende Huo
Original assignee: Hubei Aviation Precision Machinery Technology Co., Ltd.
Priority date: 2007-10-12
Filing date: 2008-10-09
Publication date: 2009-04-23
Also published as: CN101407188B; CN101407188A

Abstract

A self-locking structure for seat backrest folding has a seat linking board (21) fixedly linked with a seat and pivotally linked with a transitionary board (22) via an angle adjuster. The transitionary board is pivotally linked with a backrest linking board (24) and is fixedly linked with a locking block which is provided with a locking indentation (223). The backrest linking board is pivotally linked with a locking boss (26) via a locking shaft (241), and a replacement component is set between the backrest linking board and the locking boss. A locking part (261) of the locking boss engages with the locking indentation (223) under the effectof the replacement component so as to form self-locking. The locking boss (26) is linked with an unlocking mechanism, which can force the locking boss (26) to turn around the locking shaft (241) under the effect of an external force in order to unlock the locking part (261) and the locking indentation (223). Without regard to the angle of the backrest, the backrest can be folded smoothly through operating the unlocking mechanism.

Description

The present invention claims the priority of the Chinese patent application filed on October 12, 2007, the Chinese Patent Office, the application number is 200710163581.0, and the invention is entitled "a seat back folding self-locking device". The entire contents of which are incorporated herein by reference. Technical field

The present invention relates to a seat back adjusting device, and more particularly to a seat back folding self-locking device for a vehicle such as a vehicle. Background technique

The backrest of a seat of a vehicle such as a vehicle often needs to be folded to stack the backrest of the seat on the seat surface, thereby obtaining various advantages such as space saving.

The folding and resetting of the above-mentioned seat back is achieved by folding the self-locking device.

1 and FIG. 2, FIG. 1 is an exploded isometric view of a prior art seat back folding self-locking device, and FIG. 2 is an exploded isometric view of a prior art seat back folding self-locking device. .

The prior art seat back folding self-locking device includes a seat connecting plate 11 fixedly coupled to the seat, and the upper end portion of the seat connecting plate 11 is provided with a blocking structure 111 as an unlocking device. The seat connecting plate 11 pivotally connects the transition plate 12 through a recliner, and the transition plate 12 is rotatable relative to the seat connecting plate 11 about the central axis of the reclining of the recliner under the action of the recliner. The transition plate 12 is pivotally connected to the seat back connecting plate 14 via the rotating shaft 13. The transition plate 12 is fixedly connected to the fixed shaft 121, and the lock buckle 15 is pivotally connected to the transition plate 12 via the fixed shaft 121. The lock buckle 15 is provided with a locking portion 151 and a boss portion 152. The locking portion 151 has a first locking surface 1511 (shown only in Figure 2). One end of the reset torsion spring 17 is wound around the fixed shaft 121, and the other end thereof is overlapped at the edge of the lock buckle 15. The seat back connecting plate 14 is fixedly connected to the locking block 16 by rivets. The locking block 16 is provided with a locking groove 161 that cooperates with the shape of the locking portion 151 of the locking buckle 15. The locking groove 161 has a second locking surface 1611 (shown only in Figure 1). The protective baffle 18 is fixedly coupled to the transition plate 12 for restraining the locking block 16 and the locking clasp 15 in the same plane. Under the action of the reset torsion spring 17, the locking portion 151 of the locking buckle 15 and the locking groove 161 of the locking block 16 , the first locking surface 1511 of the locking portion 151 and the second locking groove 161 The locking faces 1611 are locked to each other, and the locking clasp 15 thus forms a self-locking with the locking block 16. Please refer to FIG. 3. FIG. 3 is an assembled view of the prior art seat back folding self-locking device shown in FIGS. 1 and 2.

The transition plate 12 can be adjusted in angle with the seat connecting plate 11 by a recliner. Since the locking clasp 15 and the locking block 16 can form a self-locking, the seat back connecting plate 14 can rotate with the transition plate 12 about the central axis of the reclining of the recliner. When the transition plate 12 and the seat back connecting plate 14 are integrally rotated forward to a certain position around the center of the angle adjustment of the recliner, the boss portion 152 and the seat connecting plate 11 on the lock buckle 15 are 11 The upper end blocking structure 111 is in contact. Continuing to rotate the transition plate 12 and the seat back connecting plate 14 as a whole, the blocking structure 111 slid the convex portion 152 to rotate the locking buckle 15 about the fixed shaft 121, and the direction of rotation thereof and the direction of the elastic force of the return torsion spring 17 are restored. in contrast. The locking portion 151 of the locking buckle 15 is thus disengaged from the locking groove 161 of the locking block 16, and the locking buckle 15 is thus unlocked with the locking block 16, and the seat back connecting plate 11 can be moved forward about the rotating shaft 13 (ie, FIG. 3 Rotate the fold in the clockwise direction. At this time, the folding of the seat back fixedly attached to the seat back connecting plate 11 is realized, and the central axis of the fixed shaft 121 is the folded central shaft.

When the seat back needs to be pushed up to return to the normally used locking state, the seat back and the seat back connecting plate 14 are first erected, and the seat back connecting plate 14 is restored to its rotation about the rotating shaft 13 The position where it was previously; then continue to push the seat back connecting plate 14 backwards (ie, clockwise in FIG. 3) and adjust the recliner to rotate the transition plate 12 and the seat back connecting plate 14 as a whole. During the rotation, the blocking structure 111 of the seat connecting plate 11 gradually loosens the convex portion 152 of the locking buckle 15, and the locking buckle 15 gradually recovers the locking position under the action of the reset torsion spring 17, the locking buckle 15 The raised portion 152 is again located in the locking groove 161 of the locking block 16 , and the first locking surface 1511 and the second locking surface 1611 are finally locked to each other, and the locking buckle 15 thus recovers from the self-locking state of the locking block 16 . At this time, the normal locking state of the seat back fixedly coupled to the seat back connecting plate 11 is restored.

The above-described prior art seat back folding self-locking device slid the boss portion 152 of the lock buckle 15 by the blocking structure 111 as the unlocking device to unlock the transition plate 12 and the seat back connecting plate 14. Since the blocking structure 111 is fixedly coupled to the upper end portion of the seat connecting plate 11, the unlocking manner determines that only the transition plate 12 and the seat back connecting plate 14 are rotated as a whole around the central axis of the angle adjuster to a certain angle. At a certain angle, the blocking structure 111 can be used to move the boss 152 to unlock the transition plate 12 and the seat back connecting plate 14, that is, the seat back only at a certain position. In order to achieve folding. At the same time, when the self-folding state is restored to the locked state, the seat back can only be restored to the above specific position. This brings great inconvenience to the use of the seat.

Summary of the invention

In view of the above deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a seat back folding self-locking device which can realize folding when the seat back is at any angle.

In order to achieve the above object, the present invention provides a seat back folding self-locking device, comprising a seat connecting plate fixedly connected to a seat, the seat connecting plate pivoting a transition plate through a corner adjusting device, the transition plate The pivoting seat back connecting plate is fixedly connected to the locking block provided with the locking groove, and the seat back connecting plate pivotally locks the locking buckle through the locking shaft, and a reset is arranged between the locking back and the locking buckle a locking portion of the locking buckle is located in the locking groove, and a first locking surface of the locking groove and a second locking of the locking portion The locking surface is self-locking, and the locking buckle is connected to the unlocking structure, and the unlocking structure drives the locking buckle to rotate around the locking shaft under the action of an external force, so that the first locking surface and the first locking surface The two locking surfaces are separated.

Preferably, the unlocking structure includes an unlocking handle pivotally mounted to the locking shaft, and the unlocking handle is fixedly coupled to the locking buckle.

Preferably, the unlocking structure includes an unlocking wire, and the unlocking wire connects the locking buckle at a position away from the locking shaft.

Preferably, the end of the unlocking wire is connected with a connecting ring, the connecting buckle is disposed at a position away from the locking shaft, and the connecting ring is pivotally connected to the connecting shaft.

Preferably, the unlocking structure includes an outer locking buckle pivotally connected to the locking shaft, the outer locking buckle is fixedly connected with the locking buckle, and the outer locking buckle has a first convex portion The transition plate is pivotally connected to the unlocking buckle by the unlocking shaft, and the unlocking buckle is connected to the transmission component, and the transmission component drives the unlocking buckle to rotate around the unlocking shaft under the action of an external force, so that the unlocking buckle is second. The raised portion toggles the first raised portion of the outer lock buckle and drives the lock buckle to rotate about the lock shaft.

Preferably, the transmission member includes a transmission handle pivotally mounted to the unlocking shaft, and the transmission handle is fixedly coupled to the unlocking buckle.

Preferably, the transmission member includes a transmission cable, and the transmission cable is coupled to the unlocking buckle at a position away from the unlocking shaft.

Preferably, the end of the transmission cable is fixedly mounted with a connecting ring, and the unlocking buckle is fixedly mounted. Connecting a shaft, the connecting ring is pivotally connected to the connecting shaft.

Preferably, the outer locking buckle is provided with a first protection hook, and the unlocking buckle is provided with a second protection hook. When the first locking surface and the second locking surface are self-locking, they are disposed at the Acting as a second restoring member between the unlocking buckle and the transition plate, the first protective hook and the second protective hook are hooked to each other, and the locking buckle fixedly connected with the outer locking buckle is restricted The position further restricts the locking portion in the locking groove.

Preferably, the transition plate has a circular half-punching boss, and is fixedly connected to the angle adjusting device through a top surface of the half-punching boss, a central axis of the half-punching boss and the angle adjusting device The angle adjusting plate is pivotally connected, and the transition plate and the angle adjusting device are respectively located at two sides of the seat back connecting plate.

With respect to the above background art, the seat back folding self-locking device provided by the present invention fixedly connects the unlocking device and the locking buckle, and unlocks the locking buckle and the transition plate by the unlocking device, thereby realizing the seat back Folding. During the process of changing the angle at which the seat back is changed by adjusting the recliner, the relative positional relationship between the unlocking device and the lock buckle does not change, so no matter which angle the seat back is at, The folding of the seat back is achieved by manipulating the unlocking device, which significantly facilitates the use of the seat back. DRAWINGS

1 is an exploded isometric view of a prior art seat back folding self-locking device;

2 is an exploded perspective view of the prior art seat back folding self-locking device; FIG. 3 is an assembled view of the prior art seat back folding self-locking device shown in FIGS. 1 and 2; Is an exploded isometric view of the first embodiment of the seat back folding self-locking device of the present invention;

Figure 5 is a partial exploded isometric view of the seat back folding self-locking device of Figure 4;

Figure 6 is an assembled view of the seat back folding self-locking device shown in Figure 4;

Figure 7 is a view showing the assembly of the second embodiment of the seat back folding self-locking device of the present invention;

Figure 8 is an exploded perspective view of a third embodiment of the seat back folding self-locking device of the present invention;

Figure 9 is a partial exploded isometric view of the seat back folding self-locking device of Figure 8; Figure 10 is an assembled view of the seat back folding self-locking device shown in Figure 8;

Figure 11 is a view showing the assembly of the fourth embodiment of the seat back folding self-locking device of the present invention;

Figure 12 is a structural view of a specific embodiment of the transition plate of the present invention;

Figure 13 is a structural view of a specific embodiment of the seat back connecting plate of the present invention. detailed description

The core of the invention is to provide a seat back adjustment device, in particular a seat back folding self-locking device that can be folded at any angle.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

4 and FIG. 5, FIG. 4 is an exploded isometric view of the first embodiment of the seat back folding self-locking device of the present invention, and FIG. 5 is a partial view of the seat back folding self-locking device of FIG. Decompose the isometric drawing.

In a first embodiment of the seat back folding self-locking device of the present invention, the seat back folding self-locking device comprises a seat connecting plate 21 fixedly connected with the seat, and the seat connecting plate 21 is installed with a adjusting angle. The angle adjuster 23 is fixedly connected to the transition plate 22, and the connection manner may specifically be welding or riveting, and of course, any other conventional fixed connection manner. The transition plate 22 is rotatable relative to the seat connecting plate 21 about the center axis of the angle adjustment by the angle adjuster 23. The lower end portion of the transition plate 22 is fixedly coupled to the lock block, and the lock block is provided with a lock groove 223. The locking block and the transition plate 22 can be fixedly connected in a conventional manner, and the two can also be integral. In Fig. 4, the two are specifically integrated, that is, the locking groove 223 is directly provided at the lower end portion of the transition plate 22. The locking groove 223 has a first locking surface 2231 (shown in Figure 4). The transition plate 22 also has a third raised portion 2232 (shown in Figure 5).

The transition plate 22 is pivotally connected to the seat back connecting plate 24 that is fixedly coupled to the seat back. The seat back connecting plate 24 is fixedly connected to the locking shaft 241, and the locking buckle 26 is pivotally connected to the seat back connecting plate 24 via the locking shaft 241. The lock button 26 is provided with a locking portion 261 which cooperates with the shape of the locking groove 223 at the lower end of the transition plate 22. The locking portion 261 has a second locking surface 2611 and a curved surface 2612.

The first return torsion spring 271 is wound around the lock shaft 241, and one end thereof is fixed to the seat back connecting plate 24 by a conventional manner, for example, a small hole can be formed in the seat back connecting plate 24, and the first return torsion spring is One end of the 271 is inserted into the small hole; the other end of the 271 is overlapped at the edge of the lock buckle 26. Under the action of the first return torsion spring 271, the locking portion 261 of the locking buckle 26 is located in the locking groove 223 at the lower end of the transition plate 22, and the first locking surface 2231 of the locking groove 223 and the locking portion 261 are The two locking surfaces 2611 are locked to each other, and the locking buckle 26 thus forms a self-locking with the transition plate 22, and the relative position of the seat back connecting plate 24 and the transition plate 22 is locked.

The seat back folding self-locking device further includes an unlocking device that is coupled to the locking buckle 16. In the first embodiment of the seat back folding self-locking device of the present invention, the unlocking device includes an unlocking handle 281, and the fixed end of the unlocking handle 281 is pivotally connected to the locking shaft 241, and the unlocking handle 281 is near the fixed end thereof. The position is fixedly connected to the lock buckle 26.

Please refer to FIG. 6. FIG. 6 is an assembled view of the seat back folding self-locking device shown in FIG. 4.

The downward pulling action is an unlocking handle 281 of the unlocking device, which is rotated about the locking shaft 241, and the locking buckle 26 fixedly connected thereto rotates around the locking shaft 241, so that the locking portion 261 of the locking buckle 26 is disengaged from the lock. The first locking surface 2231 of the locking groove 223 is separated from the second locking surface 2611 of the locking portion 261, and the locking buckle 26 and the transition plate 22 are unlocked. At this time, the seat back connecting plate 24 is pushed forward (clockwise direction in FIG. 6), and the seat back connecting plate 24 is rotated relative to the transition plate 22, and the third convex portion 2232 of the transition plate 22 may be along the locking portion 261. The curved surface 2612 slides to fold the seat back fixedly attached to the seat back connecting plate 24.

When it is necessary to push up the seat back to return to the normally used locking state, the seat back connecting plate 24 is pushed rearward (counterclockwise in FIG. 6), and the locking portion 261 is acted upon by the first return torsion spring 271. The curved surface 2612 fits over the third raised portion 2232 of the transition plate 22, so that when the seat back connecting plate 24 is pushed rearward, the third raised portion 2232 can slide along the curved surface 2612. The backrest connecting plate 24 is pushed back, and the locking portion 261 of the locking buckle 26 re-enters the locking groove 223 of the lower end of the transition plate 22, and the first locking surface 2231 of the locking groove 223 and the locking portion 261 The second locking surface 2611 resumes the mutual locking position, and the locking buckle 26 is restored to the self-locking with the transition plate 22, and the relative position of the seat back connecting plate 24 and the transition plate 22 is re-locked, and the seat back is restored to normal use. .

In the first embodiment of the above-described seat back folding self-locking device of the present invention, the unlocking handle 281 as the unlocking device is fixedly connected with the locking buckle 26, and the locking buckle 26 and the transition plate 22 are realized by the unlocking handle 281. The unlocking of the seat back further realizes the folding of the seat back. The handle 281 and the lock are unlocked during the process of changing the angle at which the seat back is changed by adjusting the recliner 23 The relative positional relationship of the buckles 26 does not change, so that regardless of the angle at which the seat back is at any angle, the folding of the seat back can be achieved by manipulating the unlocking handle 281. This brings significant convenience to the use of the seat back.

Please refer to FIG. 7. FIG. 7 is an assembled view of a second embodiment of the seat back folding self-locking device of the present invention.

The second embodiment of the seat back folding self-locking device of the present invention is different from the first specific embodiment in that the unlocking device specifically uses an unlocking wire 291, and the unlocking wire 291 can specifically be a wire drawing wire. The connecting shaft can be disposed at a position away from the locking shaft 241, and the unlocking wire 291 can be wound and fixed to the connecting shaft. A connecting ring may also be disposed at one end of the unlocking wire 291, and the connecting ring is pivotally connected to the connecting shaft, so as to realize the connection of the unlocking wire 291 and the locking buckle 26. The other end of the unlocking cable 291 can be secured to the top of the seat back or any other suitable location in a conventional manner.

When the seat back needs to be folded, the unlocking wire 291 is pulled, and the locking buckle 26 can be rotated around the locking shaft 241, so that the locking portion 261 of the locking buckle 26 is disengaged from the locking groove 223, and the locking groove 223 is A locking surface 2231 is then separated from the second locking surface 2611 of the locking portion 261, and the locking buckle 26 and the transition plate 22 are unlocked. After the locking buckle 26 and the transition plate 22 are unlocked, the seat back connecting plate 24 is pushed forward (clockwise in FIG. 7), and the seat back connecting plate 24 is rotated relative to the transition plate 22, and the third convex portion of the transition plate 22 is rotated. The 2232 can be slid along the curved surface 2612 of the locking portion 261 to fold the seat back fixedly mounted to the seat connecting plate 21.

The operation in the case where the seat back needs to be pushed back to the normally used locked state is the same as the operation in the first embodiment of the seat back folding and self-locking device of the present invention, and will not be described herein.

The second embodiment of the seat back folding self-locking device of the present invention uses the unlocking wire 291 to unlock the locking buckle 26 and the transition plate 22, and the length of the unlocking wire 291 can be extended according to actual needs, thereby avoiding The problem of inconvenience caused by the small space.

Please refer to FIG. 8 and FIG. 9. FIG. 8 is an exploded perspective view of a third embodiment of the seat back folding self-locking device of the present invention, and FIG. 9 is a seat back folding self-locking device of FIG. Partial decomposition of the isometric view.

The third embodiment of the seat back folding self-locking device of the present invention is relative to the first one The difference between the embodiment of the body is that the specific form of the unlocking device is different.

In a third embodiment, the unlocking device includes an outer latch 260, and the upper side of the outer latch 260 is provided with a first boss 2601. The outer locking buckle 260 is pivotally connected to the locking shaft 241 and fixedly connected to the locking buckle 26. The two may be connected by rivets, and the two may be integrated.

The unlocking device further includes an unlocking buckle 25. The transition plate 22 fixedly connects the unlocking shaft 221 and the first positioning shaft 222, and the unlocking buckle 25 is pivotally connected to the transition plate 22 through the unlocking shaft 221, and the unlocking buckle 25 is in the same plane as the outer locking buckle 260. The lower side portion of the unlocking buckle 25 is provided with a second boss portion 252, and the unlocking buckle 25 is further provided with a second positioning shaft 251. The second return torsion spring 272 is wound around the unlocking shaft 221, and one end thereof overlaps the first positioning shaft 222 fixedly connected with the transition plate 22; the other end overlaps the second positioning shaft 251 fixedly connected to the unlocking buckle 25.

The unlocking device further includes a transmission handle 282, the fixed end of the transmission handle 282 is pivotally mounted to the unlocking shaft 221, and the transmission handle 282 is fixedly coupled to the unlocking buckle 25.

Please refer to FIG. 10, which is an assembled view of the seat back folding self-locking device shown in FIG. When the seat back needs to be folded, the transmission handle 282 is pulled upward, and the unlocking buckle 25 can be rotated around the unlocking shaft 221 by the driving handle 282. The second raised portion 252 of the unlocking buckle 25 toggles the first raised portion 2601 of the outer locking buckle 260, and the outer locking buckle 260 thus rotates with the locking buckle 26 about the locking shaft 241, the direction of rotation and unlocking The buckle 25 is rotated in the opposite direction. The locking portion 261 of the locking buckle 26 is disengaged from the locking groove 223, and the first locking surface 2231 of the locking groove 223 is separated from the second locking surface 2611 of the locking portion 261. The locking buckle 26 and the transition plate 22 are unlocked. At this time, the seat back connecting plate 24 is pushed forward (clockwise in FIG. 10), and the seat back connecting plate 24 is rotated relative to the transition plate 22, and the third convex portion 2232 of the transition plate 22 may be along the locking portion 261. The curved surface 2612 slides to fold the seat back fixedly attached to the seat back connecting plate 24.

The third embodiment of the seat back folding self-locking device of the present invention drives the unlocking buckle 25 to rotate by the driving handle 282, and the external locking buckle 260 of the unlocking buckle 25 is The locking buckle 26 is fixedly connected to the outer locking buckle 260, thereby unlocking the locking buckle 26 and the transition plate 22. The unlocking manner of the indirect dial lock 26 can realize the downward movement of the lock buckle 26 by the upward movement of the transmission handle 282, thereby avoiding the inconvenience of pulling the transmission handle 282 downward, and the seat back is folded from the seat back. The operation of the lock device is more convenient.

Referring to Figure 11, Figure 11 is an assembled view of a fourth embodiment of the seat back folding self-locking device of the present invention.

The fourth embodiment of the seat back folding self-locking device of the present invention is an improvement based on the third specific embodiment. The fourth embodiment replaces the drive handle 282 of the third embodiment with a drive cable 292.

In the fourth embodiment, the unlocking device further includes a transmission cable 292, and the transmission cable 292 may specifically be a wire cable. The connecting shaft can be disposed at a position away from the unlocking shaft 221, and the driving cable 292 can be wound and fixed to the connecting shaft. It is also possible to provide a connecting ring at one end of the drive cable 292, through which the drive cable 292 is pivotally connected to the connecting shaft, thereby achieving connection of the drive cable 292 to the unlocking buckle 25. The other end of the drive cable 292 can be secured to the top of the seat back or any other suitable location in a conventional manner.

When the seat back needs to be folded, the drive cable 292 is pulled upward, and the unlocking buckle 25 is rotated about the unlocking shaft 221. The second raised portion 252 of the unlocking buckle 25 slid the first raised portion 2601 of the outer locking buckle 260, and the outer locking buckle 260 thus rotates with the locking buckle 26 about the locking shaft 241, and the direction of rotation thereof is The unlocking buckle 25 is rotated in the opposite direction. The driving portion 292 is pulled upward to release the locking portion 261 of the locking buckle 26 from the locking groove 223. The first locking surface 2231 of the locking groove 223 is separated from the second locking surface 2611 of the locking portion 261. The locking buckle 26 and the transition plate 22 are unlocked. At this time, the seat back connecting plate 24 is pushed forward (clockwise in FIG. 11), and the seat back connecting plate 24 is rotated relative to the transition plate 22, and the third convex portion 2232 of the transition plate 22 may be along the locking portion 261. The curved surface 2612 slides to fold the seat back fixedly attached to the seat back connecting plate 24.

The fourth embodiment of the seat back folding self-locking device of the present invention is transmitted through a transmission The pull wire 292 pulls the unlocking buckle 25 to rotate, and the unlocking buckle 25 plucks the outer locking buckle 260 and the locking buckle 26 fixedly connected with the outer locking buckle 260, thereby unlocking the locking buckle 26 and the transition plate 22. The manner of unlocking the locking buckle 26 indirectly through the driving cable 292 avoids the inconvenience of pulling the unlocking cable 291 downward, and can adjust the position of the operation according to actual needs, for example, the driving cable 292 can be away from the end of the unlocking buckle 25. Fixed on the top of the seat back, the drive cable 292 can be pulled from the top of the seat back, which further facilitates the operation of the seat back folding self-locking device.

Further adjustments can be made to the fourth embodiment of the seat back folding self-locking device of the present invention described above.

Still refer to Figure 11. The outer lock buckle 260 may further be provided with a first protection hook 2602, and the first protection hook 2602 is preferably disposed at a position away from the lock shaft 241. The unlocking buckle 25 may further be provided with a second protection hook 253 that cooperates with the first protection hook 2602.

When the seat back connecting plate 24 and the transition plate 22 are locked to each other, that is, when the locking portion 261 of the locking buckle 26 is located in the locking groove 223, the second protection hook 253 of the unlocking buckle 25 can hook the outer locking buckle 260. The first protection hook 2602 limits the position of the outer lock buckle 260. Under the action of the second return torsion spring 272, the second protective hook 253 of the unlocking buckle 25 remains engaged with the first protective hook 2602 of the outer lock buckle 260.

Since the outer lock buckle 260 is fixedly connected to the lock buckle 26, the position of the lock portion 261 of the lock buckle 26 in the lock groove 223 is locked, so that the seat back can be prevented from being accidentally folded, and the seat is raised. The reliability of the seat back folding self-locking device.

Referring to Figures 12 and 13, Figure 12 is a structural view of a specific embodiment of the transition plate of the present invention, and Figure 13 is a structural view of a specific embodiment of the seat back connecting plate of the present invention.

In a specific embodiment of the transition plate of the present invention, the transition plate 22 has a circular half-punching boss 221; in a specific embodiment of the transition plate of the present invention, the seat back connecting plate 24 is provided with a central hole 242. . The inner diameter of the center hole 242 of the seat back connecting plate 24 is equal to or slightly larger than the outer diameter of the half punching boss 221, and the center hole 242 can cooperate with the step side surface 2211 of the semi-collision table 221, and the seat back connecting plate 24 is in this manner and transition. The plate 22 is pivotally connected. In this pivotal manner, the longitudinal force strength of the seat back folding self-locking device can be improved.

The top portion 2212 of the half punching boss 221 is provided with a plurality of connecting holes 2213 through which the transition plate 22 is connected The hole 2213 is fixedly coupled to the angle adjusting device 23. The central axis of the half punching boss 221 coincides with the center axis of the angle adjustment of the angle adjusting device 23.

The transition plate 22 and the angle adjusting device 23 are respectively located on both sides of the seat back connecting plate 24, and the angle adjusting device 23 is fixedly connected with the seat connecting plate 21 to form a splint structure. Therefore, the seat back folding self-locking device has a higher lateral strength and a smaller lateral clearance.

The seat back folding self-locking provided by the present invention is described in detail above. This application is intended to aid in understanding the invention and its core idea. In the meantime, the present invention is not limited by the scope of the present invention.

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Claims

Rights request

A seat back folding self-locking device, comprising a seat connecting plate (21) fixedly connected to the seat, the seat connecting plate (21) pivotally connecting the transition plate (22) by the angle adjusting device, The transition plate (22) pivotally connects the seat back connecting plate (24) and is fixedly connected with a locking block provided with a locking groove (223), and the seat back connecting plate (24) is pivotally locked by the locking shaft (241) A locking member is disposed between the buckle (26) and the locking buckle (26), and the locking portion (261) of the locking buckle (26) is located in the locking by the resetting member In the slot (223), the first locking surface (2231) of the locking groove (223) and the second locking surface (2611) of the locking portion (261) form a self-locking feature, characterized in that The locking buckle (26) is connected to the unlocking structure, and the unlocking structure drives the locking buckle (26) to rotate around the locking shaft (241) under the action of an external force, so that the first locking surface (2231) ) is detached from the second locking surface (2611).

2. The seat back folding self-locking device according to claim 1, wherein the unlocking structure comprises an unlocking handle (281) pivotally mounted to the locking shaft (241), the unlocking handle (281) ) is fixedly connected to the lock button (26).

The seat back folding self-locking device according to claim 1, wherein the unlocking structure comprises an unlocking wire (291), and the unlocking wire (291) is away from the locking shaft (241). The lock button (26) is connected at a position.

The seat back folding self-locking device according to claim 3, wherein the end of the unlocking wire (291) is mounted with a connecting ring, and the locking buckle (26) is away from the locking shaft ( The position of the 241) is provided with a connecting shaft, and the connecting ring is pivotally connected to the connecting shaft.

The seat back folding self-locking device according to claim 1, wherein the unlocking structure comprises an outer locking buckle (260) pivotally connected to the locking shaft (241), the outer lock a buckle (260) is fixedly coupled to the lock buckle (26), and the outer lock buckle (260) has a first boss

(2601); the transition plate (22) is pivotally connected to the unlocking buckle (25) through the unlocking shaft (221), the unlocking buckle (25) is connected to the transmission component, and the transmission component drives the unlocking buckle under the action of an external force (25) rotating about the unlocking shaft (221), causing the second convex portion (252) of the unlocking buckle (25) to move the first convex portion (2601) of the outer locking buckle (260) And driving the lock buckle (26) to rotate around the lock shaft (241).

6. The seat back folding self-locking device according to claim 5, wherein the transmission The moving component includes a transmission handle (282) pivotally mounted to the unlocking shaft (241), and the transmission handle (282) is fixedly coupled to the unlocking buckle (25).

7. The seat back folding self-locking device according to claim 5, wherein the transmission member comprises a transmission cable (292), and the transmission cable (292) and the unlocking buckle (25) are away from each other. The positional connection of the unlocking shaft (221) is described.

The seat back folding self-locking device according to claim 7, wherein the end of the transmission cable (292) is fixedly mounted with a connecting ring, and the unlocking buckle (25) is fixedly mounted with a connecting shaft, A connecting ring is pivotally connected to the connecting shaft.

The seat back folding self-locking device according to claim 5, wherein the outer lock buckle (260) is provided with a first protection hook (2602), and the unlocking buckle (25) is provided with a first a second protection hook (253), the first locking surface (2231) and the second locking surface (2611) are self-locking, disposed between the unlocking buckle (25) and the transition plate (22) The first protection hook (2602) and the second protection hook (253) are hooked together by the second reset member, and the lock buckle fixedly connected to the outer lock buckle (260) is restricted. The position of (26) further restricts the locking portion (261) to the locking groove (223).

10. The seat back folding self-locking device according to claim 1, wherein the transition plate (22) has a circular half-punching boss (221) and passes through the half-punching boss (221). The top of the half is fixedly coupled to the angle adjusting device, the central axis of the half punching boss (221) coincides with the center axis of the angle adjustment device, and the transition plate (22) passes through the half punch The step side surface (2211) of the table (221) is pivotally connected to the seat back connecting plate (24), and the transition plate (22) and the angle adjusting device are respectively located at two sides of the seat back connecting plate (24).