CN114179689A

CN114179689A - Back lock

Info

Publication number: CN114179689A
Application number: CN202210028412.0A
Authority: CN
Inventors: 邓威; 杨贝克; 张莹; 王聪; 王秀孔
Original assignee: Hubei Hapm Magna Seating Systems Co ltd
Current assignee: Hubei Hapm Magna Seating Systems Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-03-15

Abstract

The invention discloses a car seat backrest lock, which comprises a lock tongue, a connecting rod mechanism and an operation part for driving the connecting rod mechanism to act; the connecting rod mechanism comprises a first connecting rod part, a second connecting rod part and a third connecting rod part which are sequentially hinged, and the first connecting rod part and the third connecting rod part can also respectively rotate around a hinge point which is additionally arranged; when the lock bolt is located at the locking position, the third connecting rod portion is matched with the lock bolt for locking, the operating portion drives the connecting rod mechanism to act, and the third connecting rod portion follows up to be separated from the lock bolt. The backrest lock drives the lock tongue to unlock through the linkage action of the connecting rod mechanism, the connecting rod mechanism is driven reliably and easy to control, the structure is relatively simple, a complex driving mechanism is not required to be arranged, and the cost can be reduced.

Description

Back lock

Technical Field

The invention relates to the technical field of automobiles, in particular to a backrest lock.

Background

Along with the popularization of passenger cars, the requirement of people on comfort is continuously improved on the premise of meeting safety, so that the multifunctional rear seat in the limited compartment space has great market demand.

At present, the back row seat includes more than one back, locks the automobile body skeleton position at the back row seat through the back lock, and back lock unblock back, the back can be folded forward and wholly demolish with the cooperation ground lock to increase storing space. Therefore, the foldable backrest seat can be switched between two modes of increasing the storage space and the sitting space. However, the existing backrest lock has a complicated structure, and how to simplify the structure of the backrest lock is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention provides a backrest lock, which comprises a lock tongue, a connecting rod mechanism and an operating part, wherein the operating part drives the connecting rod mechanism to act; the connecting rod mechanism comprises a first connecting rod part, a second connecting rod part and a third connecting rod part which are sequentially hinged, and the first connecting rod part and the third connecting rod part can also respectively rotate around a hinge point which is additionally arranged; when the lock bolt is located at the locking position, the third connecting rod portion is matched with the lock bolt for locking, the operating portion drives the connecting rod mechanism to act, and the third connecting rod portion follows up to be separated from the lock bolt.

Optionally, the lock tongue may also rotate around a hinge point corresponding thereto, and the hinge axis is parallel to each hinge axis of the link mechanism.

Optionally, the lock tongue is provided with a first lock tooth, the third connecting rod portion is provided with a second lock tooth, and the first lock tooth is engaged with the second lock tooth during locking.

Optionally, the spring bolt is provided with a torsion spring, the torsion spring drives the first lock tooth to be engaged with the second lock tooth, and the link mechanism acts to enable the third connecting rod portion to be disengaged from the spring bolt, so that the spring bolt is driven to rotate to unlock.

Optionally, at least one of the first link portion and the third link portion is provided with a torsion spring that prevents rotation in an unlocking direction.

Optionally, still include the casing, first connecting rod portion, third connecting rod portion, the spring bolt all articulates in the casing, forms corresponding the pin joint.

Optionally, the lock further comprises a guard plate located in the housing, and the third connecting rod portion and the lock tongue are both hinged to the guard plate.

Optionally, the operation portion drives the first connecting rod portion to rotate to drive the second connecting rod portion to move, and then drives the third connecting rod portion to rotate around the hinge point.

Optionally, the lock further comprises an indicator, the indicator is linked with the link mechanism or the lock tongue, and when the lock is unlocked and/or locked, the indicator acts to give an instruction of unlocking or locking.

The invention further provides an automobile which comprises a rear-row seat, wherein the rear-row seat comprises at least one backrest, the backrest is connected with the adjacent backrest or the automobile body through the backrest lock, a lock latch is arranged adjacent to the backrest or the automobile body, and a lock tongue of the backrest lock can lock the lock latch or be separated from the lock latch to unlock the lock latch.

According to the automobile and the backrest lock thereof, the lock tongue is driven to unlock through the linkage action of the link mechanism, the link mechanism is reliable in driving, easy to operate and control and relatively simple in structure, a complex driving mechanism is not required, and the cost can be reduced.

Drawings

FIG. 1 is a schematic diagram of a backrest lock according to an embodiment of the present invention;

FIG. 2 is a schematic view of FIG. 1 from another perspective;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a schematic view of FIG. 1 with the first housing broken away;

FIG. 6 is a schematic view of FIG. 1 with the second housing broken away;

FIG. 7 is a schematic view of FIG. 6 with the shield removed;

FIG. 8 is a left side view of FIG. 7;

FIG. 9 is a schematic view of FIG. 7 after unlocking;

FIG. 10 is a left side view of FIG. 9;

fig. 11 is a schematic view of the first back frame and the second back frame locking;

FIG. 12 is a schematic view of FIG. 11 from another perspective;

fig. 13 is a schematic view of the backside of fig. 11.

The reference numerals in fig. 1-13 are illustrated as follows:

100-a first housing; 200-a second housing;

10-a first link portion; 20-a second link portion; 30-a third link portion; 40-a locking tongue;

501-a first articulated shaft; 501 a-retaining cap; 502-a second articulated shaft; 503-a third hinge axis; 503 a-backstop cap; 504-a fourth hinge axis; 504 a-self-lubricating bearing sleeve; 505-a fifth articulation axis; 505 a-self-lubricating bearing sleeve;

601-a first torsion spring; 602-a second torsion spring; 603-a third torsion spring;

70-an indicator;

80-operating buttons;

90-guard board;

a, a first backrest framework; a1-mounting bracket; a 2-bolt; a 21-bolt head;

b, a second backrest framework; b1-latch.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-5, fig. 1 is a schematic structural diagram of an embodiment of a backrest lock provided in the present invention; FIG. 2 is a schematic view of FIG. 1 from another perspective; FIG. 3 is a side view of FIG. 1; FIG. 4 is a right side view of FIG. 3; fig. 5 is a schematic view of fig. 1 with the first housing 100 disassembled; fig. 6 is a schematic view of fig. 1 with the second housing 200 disassembled.

The backrest lock is applied to a rear seat of a vehicle, when the backrest lock is locked, the backrest of the rear seat and a vehicle body on the rear side of the vehicle are fixed, when the backrest lock is unlocked, the backrest of the rear seat and the vehicle body are unlocked, and the backrest can be folded like the front side of the vehicle.

As shown in fig. 1 and 2, the back lock includes a housing formed by a first housing 100 and a second housing 200, a latch 40 disposed in the housing, a link mechanism, and an operation portion for driving the link mechanism to operate.

As shown in fig. 5 and 6, the link mechanism specifically includes a first link portion 10, a second link portion 20, and a third link portion 30, which are sequentially hinged, wherein the second link portion 20 is located in the middle of the link structure, two ends of the second link portion 20 are respectively hinged to a second hinge shaft 502 and a third hinge shaft 503 with the first link portion 10 and the third link portion 30, and the second hinge shaft 502 and the third hinge shaft 503 are not connected to the housing.

The first link portion 10 and the third link portion 30 further have another hinge point with the housing, and the two can rotate around the corresponding hinge point, specifically, the middle portion of the first link portion 10 is further hinged to the first hinge shaft 501 with the first housing 100, the position of the first hinge shaft 501 is the hinge point corresponding to the first link portion 10, the end portion of the third link portion 30 opposite to the third hinge shaft 503 is hinged to the fourth hinge shaft 504 with the first housing 100, and the position of the fourth hinge shaft 504 is the hinge point corresponding to the third link portion 30. It can be seen that the first link portion 10, the second link portion 20, and the third link portion 30 form a linkage link mechanism, and any one of the three driving mechanisms can drive the link mechanism to act, which is specifically represented by the first link portion 10 rotating around the first hinge shaft 501, the third link portion 30 rotating around the fourth hinge shaft 504, and the second link portion 20 not rotating around a point alone as a transmission rod.

Referring to fig. 6, the middle portion of the first link portion 10 is hinged to the first housing 100, one end of the first link portion and the second link portion 20 are hinged to the second hinge shaft 502, and the driving portion can be connected to the other end opposite to the second hinge shaft 502, for example, the driving portion can be the operation button 70 disposed at the end portion of the first link portion 10, and the operation button 70 and the first link portion 10 can be an integrated structure. When the user presses the operation button 70, the first link portion 10 will transmit around the first hinge shaft 501, and then the first link portion 10 will drive the second link portion 20 to move, and the second link portion 20 will drive the third link portion 30 to move, specifically, in fig. 6, when the operation button 70 is pressed in the direction approximately rightward, the first link portion 10 will rotate clockwise, and the second link portion 20 is pulled approximately leftward, and the second link portion 20 drives the third link portion 30 to rotate clockwise.

The first link portion 10 and the third link portion 30 are further respectively provided with a first torsion spring 601 and a second torsion spring 602, one end of each torsion spring is fixed relative to the housing, and the other end of each torsion spring is correspondingly connected to the first link portion 10 or the third link portion 30. The first torsion spring 601 and the second torsion spring 602 provide elastic force for preventing the link mechanism from moving in the unlocking direction, and the elastic force of the first torsion spring 601 and the elastic force of the second torsion spring 602 need to be overcome when the first link portion 10 is pushed. It can be known that, the purpose of restoring can be achieved by at least one of the first torsion spring 601 and the second torsion spring 602, and the two torsion springs are provided to make the whole mechanism more reliable, and when the operation button 70 is disposed on the first link portion 10, the first torsion spring 70 disposed corresponding to the first link portion 10 can improve the operation feeling of the user.

It is understood that the operation portion is provided here to drive the link mechanism to operate, and for the arrangement in fig. 6, the pressing operation button 70 is to push the first link portion 10 to rotate clockwise, and for realizing clockwise driving, the operation portion is not limited to the operation button 70 provided at the end of the first link portion 10 in the present embodiment, and the operation manner is not limited to the pressing driving manner. For example, the operation portion may be provided with a pulling member, and the first connecting rod portion 10 is driven to rotate clockwise by pulling during operation; or, the operation portion may be disposed at a position where the first link portion 10 is hinged to the second hinge shaft 502, the first link portion 10 may be pushed or pulled to rotate clockwise, and the inner member thereof may be adjusted in position accordingly, which is not limited in this embodiment.

Based on the same principle, the operation portion may drive the link mechanism to operate by pushing or pulling the third link portion 30 or the second link portion 20, and of course, the first link portion 10 and the third link portion 30 can only rotate around the first hinge shaft 501 and the fourth hinge shaft 504, respectively, so that the operation portion is easier to control during operation, the movement track of the second link portion 20 as the transmission portion is relatively complicated, and in addition, the third link portion 30 needs to be used for cooperating with the latch bolt 40, so the operation portion is preferably provided and drives the first link portion 10. The middle portion of the first link portion 10 is hinged to the housing at the first hinge shaft 501, so that the operation portion can be driven conveniently, and if the operation portion drives other components in the link mechanism, the position where the first link portion 10 is hinged to the housing is not limited to the middle portion, and may be an end portion opposite to the hinged position of the second hinge shaft 502.

Referring to fig. 7, fig. 7 is a schematic view of fig. 6 with the guard plate 90 removed.

The backrest lock further includes a latch tongue 40, the latch tongue 40 and the first housing 100 are hinged to a fifth hinge shaft 505, the latch tongue 40 is provided with a latch hook, the latch hook can be matched with a latch bolt B1 (shown in fig. 12 and 13) fixed relative to a backrest seat of the vehicle body, the latch bolt B1 can be hooked by counterclockwise rotation around the fifth hinge shaft 505 to lock the backrest and the vehicle body, the latch bolt B1 can be disengaged by clockwise rotation in the opposite direction, and the backrest and the vehicle body can be unlocked. In this embodiment, locking tongue 40 is engaged with third connecting rod portion 30, and a first locking tooth is disposed on the outer periphery of a portion of locking tongue 40 facing third connecting rod portion 30, and a second locking tooth capable of being engaged with the outer periphery of third connecting rod portion 30. In the position shown in fig. 6, the second locking tooth of third link portion 30 and the first locking tooth of locking bolt 40 are in meshing interlock,

it should be noted that, in this embodiment, the driving of lock tongue 40 is conveniently realized by using the linkage principle of the link mechanism, and first link portion 10, second link portion 20, and third link portion 30 are also named based on the link mechanism, but the three portions are not limited to be rod-shaped structures, as long as the three portions can realize linkage based on the link mechanism principle.

As shown in fig. 5, a third torsion spring 603 may be further provided, the third torsion spring 603 is disposed between the locking bolt 40 and the first housing 100, and taking fig. 7 as a viewing angle, the third torsion spring 603 provides an elastic force for clockwise rotation of the locking bolt 40, and the second torsion spring 602 provides an elastic force for counterclockwise rotation of the third link portion 30, so that the first locking tooth and the second locking tooth may be more tightly engaged, and the locked state of the locking bolt 40 is maintained.

As will be understood by referring to fig. 5 and 6, a guard plate 90 is disposed in the housing of the backrest lock, the fourth hinge shaft 504 and the fifth hinge shaft 505 are fixed to the guard plate 90, and may be connected to the guard plate 90 through a self-lubricating bearing sleeve, specifically, fig. 7 shows a self-lubricating bearing sleeve 504a at the fourth hinge shaft 504 and a self-lubricating bearing 505a at the fifth hinge shaft 505.

Here, guard plate 90 installs third connecting rod portion 30 and locking tongue 40 together, and third connecting rod portion 30 and locking tongue 40 can be as the lock body portion of whole, easily whole installation and change, are favorable to keeping the degree of cooperation of third connecting rod portion 30 and locking tongue 40, ensure the reliability of unblock and locking.

As shown in fig. 6, the end of the first hinge shaft 501 of the first link part 10 is further provided with a backstop cap 501a to prevent the first link part 10 from being detached from the first hinge shaft 501, and as a torsion spring seat of the first torsion spring 601, the first torsion spring 601 is provided between the backstop cap 501a and the first housing 100. A retaining cap 503a may be provided at an end of the third hinge shaft 503 to prevent the third link 30 and the second link 20 from being separated from the third hinge shaft 503, and both ends of the second hinge shaft 502 may be directly riveted to both outer surfaces of the first link 10, as shown in fig. 6, which shows a rivet 502.

Referring again to FIGS. 8-10, FIG. 8 is a left side view of FIG. 7; FIG. 9 is a schematic view of FIG. 7 after unlocking; fig. 10 is a left side view of fig. 9.

The unlocking and locking processes are described in sequence as follows:

an unlocking process: referring to fig. 7, when the user presses the operating button 70, the first link 10 rotates clockwise around the first hinge shaft 501, the second link 20 is pulled leftwards, and the third link 30 rotates clockwise around the fourth hinge shaft 504, and the third link 30 gradually moves away from the latch 40 during the clockwise rotation, so that the second latch tooth of the third link 30 disengages from the first latch tooth of the latch 40, the latch 40 rotates clockwise under the restoring force of the third torsion spring 603, and the unlocked state shown in fig. 9 is reached, and the latch 40 at this time correspondingly disengages from the latch B1 fixed relative to the vehicle body, so as to unlock the backrest and the vehicle body, and the backrest can be flipped forward to be partially folded with the seat pan;

and (3) locking process: referring to fig. 9, when latch tongue 40 contacts latch B1 fixed to the vehicle body, latch tongue 40 rotates counterclockwise against the restoring force of third torsion spring 603 under the pushing action of latch B1, and latch tongue 40 continues to rotate until the first tooth of latch tongue 40 is again engaged and locked with the second tooth of third link portion 30 based on the peripheral curve guiding design of latch tongue 40. The restoring force of the third spring keeps latch bolt 40 rotating clockwise, and the restoring force of the second spring keeps third link portion 30 rotating counterclockwise, so that third link portion 30 and latch bolt 40 are locked and kept in the locked state until the link mechanism acts to overcome the restoring force of the second spring in the above-mentioned unlocking process.

As shown in fig. 7, an indication member 80 may be further provided, the indication member 80 may be provided with an indication area, the indication area may be completely or partially hidden in the housing, meanwhile, the indication member 80 and the first link portion 10 are arranged in a linkage manner, when the link mechanism is operated, the indication member 80 is operated together, and after the unlocking or locking is performed, the hidden indication area may be exposed out of the housing to remind an operator. As shown in fig. 10, the indication area may be "warning unlock" as shown in fig. 10, and the end of the housing is notched to form an indication window, and after unlocking, the indication area rotates to a window position and is exposed from the end of the housing as the indicator 80 rotates. It can be understood that the indication area of the indication piece 80 can indicate unlocking and locking, and can also be provided with indication areas for unlocking and locking, when in locking, the indication area for locking is exposed out of the shell, the indication area for unlocking is hidden in the shell, when in unlocking, the indication piece 80 changes position along with the action of the link mechanism, the indication area for unlocking rotates to be exposed out of the shell, and the indication area for locking is hidden in the shell.

Indicator 80 is not limited to be coupled to first link portion 10 to achieve linkage, and may be coupled to other positions of the link mechanism or locking tongue 40, and it is preferable that indicator 80 is coupled to first link portion 10 based on the same principle as that selected by the position where operation button 70 is disposed.

With continued reference to fig. 11-13, fig. 11 is a schematic view of the first backrest frame and the second backrest frame being locked; FIG. 12 is a schematic view of FIG. 11 from another perspective; fig. 13 is a schematic view of the backside of fig. 11.

The embodiment also provides an automobile which is provided with a rear row of seats, and the rear row of seats comprise at least one backrest. Specifically, the backrest lock may be disposed on a backrest having a backrest frame, specifically, the backrest lock may be disposed on one side of a first backrest frame a, one side of the first backrest frame a may be disposed with a mounting bracket a1, a first housing 100 of the backrest lock is disposed toward a mounting bracket a1, a fourth hinge shaft 504 and a fifth hinge shaft 505 are provided with through holes passing through in an axial direction in the present embodiment, two fasteners may be respectively inserted from the outside of the second housing 200 and pass through the fourth hinge shaft 504 and the fifth hinge shaft 505 and then pass through the first housing 100 to be connected to the mounting bracket a1 for the purpose of fastening the backrest locking to the first backrest frame a, the fasteners may be, for example, a bolt a2 shown in fig. 11, a bolt head a21 of the bolt a2 shown in fig. 12, as shown in fig. 2, the fourth hinge shaft 504 and the fifth hinge shaft 505 may be riveted to the guard plate 90, an end face formed by riveting may be an abutting end face of a bolt head 21, the first and

second housings

100 and 200 may be fixed by screws. Second back skeleton B and first back skeleton A set up side by side, and second back skeleton B is equipped with hasp B1 with the adjacent one side of first back skeleton A, and first back skeleton A and second back skeleton B accessible back lock locking or unblock realize the locking or unblock correspondingly.

The second backrest frame B and the vehicle body may also be fixed by the backrest lock in the above embodiment, or may also be fixed by other manners or by other manners of backrest locks, and the present solution is not particularly limited. The vehicle back row seat comprises at least one backrest, wherein the backrest and the adjacent backrest or the vehicle body can be connected through a backrest lock, the adjacent backrest or the vehicle body can be provided with a lock bolt B1, and a lock tongue 40 of the backrest lock can be clamped with the lock bolt B1 to be locked or separated from the lock bolt B1 to be unlocked.

It should be noted that the guard plate 90 may not be provided, the fourth hinge shaft 504 and the fifth hinge shaft 505 may be directly fixed to the housing, and the housing may be fixed to the backrest at another position. Of course, in the above-described embodiment, the locking tongue 40 and the third link portion 30 are easily detached from the housing, and the number of connection points can be reduced, thereby simplifying the structure.

It should be emphasized that, in the embodiment, the locking tongue 40 is mainly driven by the link mechanism to move to unlock and lock, the matching manner of the locking tongue 40 and the third link portion 30 is not limited to the manner of engaging the first locking tooth and the second locking tooth, and the profiles of the locking tongue 40 and the third link portion 30 may be abutted at a certain position and may be self-locked, for example, the locking tongue 40 is of a cam structure, and the outer circumference of the third link portion 30 may be abutted against the cam structure to realize self-locking, and when the third link portion 30 is disengaged with the rotation of the link mechanism, the locking tongue 40 rotates away from the self-locking position to unlock, and the working process may refer to the understanding above and will not be described again. Of course, the locking effect is obviously more reliable by the mode of locking tooth meshing and self-locking. Furthermore, locking bolt 40 is not limited to being hinged to the housing, for example, locking bolt 40 may be slidably disposed in the housing, and third link portion 30 may push locking bolt 40 to latch B1 when acting. Of course, the above-mentioned mode of setting that bolt 40 is articulated to rotate is designed for the auto-lock easily when cooperating with third connecting rod portion 30 to be favorable to guaranteeing the state of locking to keep.

In the above embodiment, the link mechanism, the latch 40, the operation portion, and the like are all disposed in the housing, the housing is not limited to the first housing 100 and the second housing 200, and may be a relatively complete housing, or one side of the housing has an opening, or even no housing is disposed, for example, the backrest lock may be directly disposed inside the backrest frame, and the backrest frame serves as a mounting base for the backrest lock.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. The backrest lock is characterized by comprising a lock tongue (40), a link mechanism and an operating part for driving the link mechanism to act; the connecting rod mechanism comprises a first connecting rod part (10), a second connecting rod part (20) and a third connecting rod part (30) which are sequentially hinged, and the first connecting rod part (10) and the third connecting rod part (30) can also rotate around another hinged point respectively; when the locking mechanism is in a locking position, the third connecting rod part (30) and the locking bolt (40) are locked in a matched mode, the operating part drives the connecting rod mechanism to act, and the third connecting rod part (30) is separated from the locking bolt (40) along with the operation.

2. Backrest lock according to claim 1, characterized in that the locking tongue (40) is also rotatable about a hinge point corresponding thereto, the hinge axis being parallel to each hinge axis of the linkage mechanism.

3. Backrest lock according to claim 2, characterized in that the locking tongue (40) is provided with a first locking tooth and the third link part (30) with a second locking tooth, the first and second locking teeth engaging when locked.

4. The back lock according to claim 3, wherein the locking bolt (40) is provided with a torsion spring driving the first locking tooth to engage with the second locking tooth, and the torsion spring drives the locking bolt (40) to rotate and unlock when the linkage mechanism is operated to disengage the third link portion (30) from the locking bolt (40).

5. Backrest lock according to claim 1, characterized in that at least one of the first link part (10) and the third link part (30) is provided with a torsion spring preventing rotation in the unlocking direction.

6. Backrest lock according to any of claims 2-5, characterized in that it further comprises a housing, to which said first link portion (10), said third link portion (30) and said bolt (40) are hinged, forming corresponding said hinge points.

7. The backrest lock of claim 6, further comprising a guard plate (90) within said housing, said third link portion (30) and said locking bolt (40) both being hingedly connected to said guard plate.

8. The backrest lock according to claim 6, further comprising a housing for mounting said locking tongue (40), said link mechanism and said cover plate (90), wherein said third link portion (30) and said hinge shaft of said locking tongue (40) have a through hole passing therethrough in the axial direction for inserting a fastening member therethrough and passing through said housing.

9. The backrest lock according to any of claims 1-5, characterized in that the operating part drives the first link part (10) to rotate and drives the second link part (20) to move, which in turn drives the third link part (30) to rotate around its hinge point.

10. A backrest lock as claimed in any one of claims 1 to 5, characterized in that it further comprises an indicator member (80), said indicator member (80) being arranged in conjunction with said linkage mechanism or said bolt (40), said indicator member (80) being operable to give an indication of unlocking or locking when unlocked and/or locked.

11. Automobile, including back row seat, characterized in that, back row seat includes at least one back, the back with adjacent the back or with the automobile body through the back lock is connected, be adjacent the back or the automobile body is equipped with the hasp, the spring bolt (40) of back lock can block hasp (B1) with the locking, or break away from hasp (B1) with the unblock.