CN216733980U

CN216733980U - Backrest lock for vehicle seat

Info

Publication number: CN216733980U
Application number: CN202220476266.3U
Authority: CN
Inventors: 邹耀忠; 杨广; 孔令创; 袁玉华
Original assignee: Jiangsu Zhongming Xianghe Seiko Co ltd
Current assignee: Jiangsu Zhongming Xianghe Seiko Co ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-06-14
Anticipated expiration: 2032-03-07

Abstract

A back lock for a vehicle seat, comprising: the locking device comprises an accommodating box body fixedly arranged on the backrest of the vehicle seat, an unlocking arm plate, a trigger plate, a reset torsion spring, a locking blade, an unlocking rod and a locking bolt arranged on the vehicle body; it has the box inner chamber to hold the box body inside, the unblock arm board with trigger the board and establish in the box body inner chamber and with holding the box body pin joint with state side by side each other, the one end of unblock arm board is stretched out and is held the box body and be connected with the unblock pole of holding the box body outside, reset torsion spring establishes at the box body inner chamber, connect the trigger board pin on the trigger board, constitute arc portion and trigger the board locking surface on the outer fringe, the lock leaf is established at the box body inner chamber and with hold the box body pin joint, there is the lock leaf fitting surface on its outer fringe surface, it still concavely is equipped with the locked groove, the set bar joint is in the locked groove. The advantages are that: the risk of maloperation unblock can be effectively avoided to promote the security, and simple structure is compact, intensity is high, and is small, simple to operate, and overall structure tolerance nature is good, and is low to the environmental requirement.

Description

Backrest lock for vehicle seat

Technical Field

The utility model belongs to the technical field of automobile spare and accessory parts, and particularly relates to a backrest lock for a vehicle seat.

Background

Nowadays, as economic society develops, automobiles are more and more favored by people as transportation tools for people to go out conveniently in daily life and become necessities of family life gradually. Whereas passenger or commercial vehicles such as cars are often equipped with seats that can be used to adjust the backrest angle to achieve a comfortable ride for the passengers. Whereas a backrest lock mechanism is usually provided on the vehicle seat backrest to achieve a fixed locking of the vehicle seat backrest and a pivoting relative to the base. The general automobile seat backrest lock comprises a shell, a locking mechanism, a pin and a lock bolt, wherein the locking mechanism comprises a ratchet wheel, a ratchet wheel shaft, a pawl shaft, a ratchet wheel return spring, a pawl return spring and the like; the existing backrest lock is complex in structure, so that the overall manufacturing process is complex, the size is large, the production cost is high, the requirement for low cost cannot be met, meanwhile, the ratchet directly drives the pawl, the pawl can be directly lifted immediately during operation to be separated from the lock bolt, and once misoperation occurs in the driving process, direct unlocking is easily caused, and unnecessary results are brought.

In view of the above, there is a need for a reasonable improvement of the existing back lock device for vehicle seats. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a backrest lock for a vehicle seat, which has the advantages of simple structure, low cost, reliability, durability and high strength, small volume, good tolerance and low requirement on environment, and has a free stroke in the unlocking process, so that the lock leaf can be prevented from being directly lifted during operation, and the safety performance can be effectively improved.

The object of the utility model is achieved in that a backrest lock for a vehicle seat comprises: the device comprises an accommodating box body 1 fixedly arranged on the backrest of the vehicle seat, an unlocking arm plate 2, a trigger plate 3, a reset torsion spring 4, a lock leaf 5, an unlocking rod 6 and a lock bolt 7 arranged on the vehicle body; the containing box body 1 is hollow and is provided with a box body inner cavity 11, the unlocking arm plate 2 and the trigger plate 3 are arranged in the box body inner cavity 11 in a parallel state, both are pivoted with the containing box body 1, one end part of the unlocking arm plate 2 is extended out of the containing box body 1 and is fixedly connected with an unlocking rod 6 arranged outside the containing box body 1, the reset torsion spring 4 is also arranged in the box body inner cavity 11, one end spring arm of the reset torsion spring 4 is abutted against the unlocking arm plate 2, the other end spring arm of the reset torsion spring 4 is fixed on the containing box body 1, the trigger plate 3 is also connected with a trigger plate stop lever 31, an arc part 21 matched with the trigger plate stop lever 31 is formed on the outer edge surface of the unlocking arm plate 2, and a trigger plate locking surface 32 is formed on the outer edge surface of the trigger plate 3, the lock leaf 5 is also arranged in the box inner cavity 11 and is pivoted with the containing box body 1, a lock leaf matching surface 51 is formed on the outer edge surface of the lock leaf 5 and at the position corresponding to the trigger plate locking surface 32, the lock leaf matching surface 51 is matched and connected with the trigger plate locking surface 32, a lock groove 52 is concavely formed on the lock leaf 5, and the lock bolt 7 is clamped in the lock groove 52.

In a specific embodiment of the present invention, the accommodating box body 1 is composed of a positioning shell 12 and a mounting plate 13 which are mutually buckled and connected together, a flange is formed at the circumferential edge position of the positioning shell 12, a positioning shell connecting shaft 121 and a positioning shell lock blade shaft 122 which both extend towards the mounting plate 13 are also connected to the positioning shell 12, a mounting plate connecting shaft 131 and a mounting plate lock blade shaft 132 are also formed on the mounting plate 13, the positioning shell connecting shaft 121 and the mounting plate connecting shaft 131 are correspondingly arranged, and the positioning shell lock blade shaft 122 and the mounting plate lock blade shaft 132 are correspondingly arranged; the trigger plate 3 further includes a trigger plate sleeve 33 extending toward the positioning housing 12, the trigger plate sleeve 33 is pivotally connected to the positioning connecting shaft 121, the unlocking arm plate 2 is pivotally connected to the mounting plate connecting shaft 131, a locking blade pivot hole 53 is formed in the body of the locking blade 5 at a position corresponding to the positioning housing locking blade shaft 122 and the mounting plate locking blade shaft 132, and the positioning housing locking blade shaft 122 and the mounting plate locking blade shaft 132 both extend into the locking blade pivot hole 53 and are pivotally connected thereto, so as to achieve the rotational connection between the locking blade 5 and the accommodating box body 1.

In another specific embodiment of the present invention, the reset torsion spring 4 is integrally coiled on the trigger sleeve 33, an unlocking arm stop protrusion 22 is convexly formed on the unlocking arm 2 at a position corresponding to one end spring arm of the reset torsion spring 4, the unlocking arm stop protrusion 22 abuts against one end spring arm of the reset torsion spring 4, a torsion spring positioning groove 123 is concavely formed on the positioning housing 12 at a position corresponding to the other end spring arm of the reset torsion spring 4, and the other end spring arm of the reset torsion spring 4 is accommodated in the torsion spring positioning groove 123.

In another embodiment of the present invention, a plastic coating is provided on the outer surface of the locking blade 5.

In a further specific embodiment of the present invention, a lock groove sleeve 521 is further disposed in the lock groove 52 of the lock leaf 5.

In yet another embodiment of the utility model, the latch 7 is a U-shaped latch with a U-shaped opening.

The utility model has the following technical effects after adopting the structure: the arc portion of unblock arm board and the trigger plate pin location of trigger plate, unblock arm board rotates when the unblock makes the lateral slope of arc portion and trigger plate pin butt and realize triggering the rotation of board, realize triggering the separation completion unblock of board and lock leaf, can not lift the lock leaf at once when the operation can be guaranteed with the idle stroke of trigger plate to unblock in-process unblock arm board, can effectively avoid the risk of maloperation unblock, thereby promote the security greatly, simultaneously this technical scheme simple structure is compact, high strength, the box body that holds that location casing and mounting panel combination formed is small, and simple to operate, the integral structure tolerance nature is good, low to the environmental requirement.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the internal structure of the embodiment shown in fig. 1.

Fig. 3 is an exploded view of the embodiment shown in fig. 1.

In the figure: 1. the box comprises a containing box body, 11 parts of a box body inner cavity, 12 parts of a positioning shell, 121 parts of a positioning shell connecting shaft, 122 parts of a positioning shell lock blade shaft, 123 parts of a torsion spring positioning groove, 13 parts of a mounting plate, 131 parts of a mounting plate connecting shaft and 132 parts of a mounting plate lock blade shaft; 2. the unlocking arm plate comprises an unlocking arm plate body 21, an arc-shaped part 22 and an unlocking arm plate baffle boss; 3. the trigger plate comprises a trigger plate, a trigger plate stop lever, a trigger plate locking surface, a trigger plate sleeve and a stop lever, wherein the trigger plate is 31, the trigger plate stop lever is 32, and the trigger plate is 33; 4. a return torsion spring; 5. the lock leaf, 51, the lock leaf matching surface, 52, the lock groove, 521, the lock groove cushion cover and 53, the lock leaf pivot hole; 6. an unlocking lever; 7. and (7) locking the bolt.

Detailed Description

In order to clearly understand the technical spirit and the advantages of the present invention, the following detailed description is given by way of examples, but the description of the examples is not intended to limit the scope of the present invention, and any equivalent changes made according to the present inventive concept, which are merely in form and not in substance, should be considered as the scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and rear are based on the position state of fig. 1, and thus, it should not be understood as a particular limitation to the technical solution provided by the present invention.

Referring to fig. 1 to 3, there is shown a backrest lock for a vehicle seat, which includes a housing body 1 fixedly installed on a backrest of the vehicle seat, an unlocking arm plate 2, a trigger plate 3, a return torsion spring 4, a locking leaf 5, an unlocking lever 6, and a locking bolt 7 provided on a vehicle body; the receiving box body 1 is hollow and is formed with a box body inner cavity 11, the unlocking arm plate 2 and the trigger plate 3 are arranged in the box body inner cavity 11 in a state of being parallel to each other and are both pivoted with the receiving box body 1, one end part of the unlocking arm plate 2 extends out of the receiving box body 1 and is fixedly connected with an unlocking rod 6 arranged outside the receiving box body 1, the reset torsion spring 4 is also arranged in the box body inner cavity 11, one end spring arm of the reset torsion spring 4 is abutted against the plate body of the unlocking arm plate 2, the other end spring arm of the reset torsion spring 4 is fixed on the receiving box body 1, the trigger plate 3 is also connected with a trigger plate stop lever 31, an arc-shaped part 21 matched with the trigger plate stop lever 31 is formed on the outer edge surface of the unlocking arm plate 2, and a trigger plate locking surface 32 is formed on the outer edge surface of the trigger plate 3, the lock leaf 5 is also arranged in the box inner cavity 11 and pivoted with the containing box 1, a lock leaf matching surface 51 is formed on the outer edge surface of the lock leaf 5 and at the position corresponding to the trigger plate locking surface 32, the lock leaf matching surface 51 is matched and connected with the trigger plate locking surface 32, a lock groove 52 is concavely formed on the lock leaf 5, and the lock bolt 7 is clamped in the lock groove 52.

In this embodiment, the accommodating box 1 is composed of a positioning housing 12 and a mounting plate 13 which are fastened together; a flange is formed at the circumferential edge of the positioning shell 12, a positioning shell connecting shaft 121 and a positioning shell lock blade shaft 122 which extend towards the mounting plate 13 are also connected to the positioning shell 12, a mounting plate connecting shaft 131 and a mounting plate lock blade shaft 132 are also formed on the mounting plate 13, the positioning shell connecting shaft 121 and the mounting plate connecting shaft 131 are correspondingly arranged, and the positioning shell lock blade shaft 122 and the mounting plate lock blade shaft 132 are correspondingly arranged; the trigger plate 3 further comprises a trigger plate sleeve 33 extending toward the positioning housing 12, the trigger plate sleeve 33 is pivotally connected to the positioning connecting shaft 121, the unlocking arm plate 2 is pivotally connected to the mounting plate connecting shaft 131, a lock blade pivot hole 53 is formed in the lock blade 5 body at a position corresponding to the positioning housing lock blade shaft 122 and the mounting plate lock blade shaft 132, the positioning housing lock blade shaft 122 and the mounting plate lock blade shaft 132 both extend into the lock blade pivot hole 53 and are pivotally connected thereto, so as to achieve rotational connection between the lock blade 5 and the accommodating box body 1, the lock blade 5 is further provided with a lock blade torsion spring for achieving self-tensioning and resetting, one spring arm of the lock blade torsion spring is fixedly connected to the accommodating box body 1, and the other spring arm of the lock blade torsion spring is connected to the lock blade 5.

Further, the reset torsion spring 4 is integrally wound around the trigger sleeve 33, and an unlocking arm stopper 22 is formed on the unlocking arm 2 at a position corresponding to one end arm of the reset torsion spring 4 in a protruding manner, the unlocking arm stopper 22 abuts against one end arm of the reset torsion spring 4, and a torsion spring positioning groove 123 is formed on the positioning housing 12 at a position corresponding to the other end arm of the reset torsion spring 4 in a recessed manner, and the other end arm of the reset torsion spring 4 is accommodated in the torsion spring positioning groove 123.

Preferably, the outer surface of the lock leaf 5 is provided with a plastic coating layer, the plastic coating layer is preferably PA (polyamide) plastic coating, and the friction impact between the lock leaf 5 and the inner surface of the accommodating box body 1 can be buffered and reduced by the plastic coating layer.

Preferably, a lock groove pad 521 is further attached to the lock groove 52 of the lock leaf 5.

Further, the lock bolt 7 is a U-shaped lock bolt with a U-shaped opening, and the width of the U-shaped opening of the U-shaped lock bolt is 25mm-45 mm.

Referring to fig. 1 to fig. 3, the applicant briefly describes the working principle of the technical solution provided by the present invention: when no external force acts, namely the backrest lock is in a locked state, the trigger plate stop lever 31 of the trigger plate 3 is matched with the arc-shaped part 21 of the unlocking arm plate 2 but not abutted against the arc-shaped part, the trigger plate locking surface 32 of the trigger plate 3 is matched and abutted against the lock leaf matching surface 51, and the lock bolt 7 is tightly clamped and installed in the lock groove 52 of the lock leaf 5; when the rotation of the vehicle seat backrest is realized by releasing the locking, the unlocking rod 6 is driven and the unlocking arm plate 2 fixedly connected with the unlocking rod is driven to rotate around the mounting plate connecting shaft 131, at the moment, the arc-shaped part 21 is abutted against the trigger plate stop lever 31, then, the unlocking arm plate 2 further rotates, the lateral inclined plane of the arc-shaped part 21 is abutted against the trigger plate stop lever 31 and the rotation of the trigger plate 3 is realized, meanwhile, in the process that the unlocking arm plate 2 rotates again, the reset torsion spring 4 is compressed, then, the trigger plate 3 further rotates, the trigger plate locking surface 32 is separated from the lock blade matching surface 51, and the lock blade 5 rotates and the lock bolt 7 is separated from the lock groove 52; after the unlocking and the angle adjustment are completed, the compressed reset spring 4 drives the unlocking arm plate 2 to reset together with the trigger plate 3, meanwhile, the lock leaf 5 resets under the driving of the torsion spring of the lock leaf 5 to complete the locking of the lock bolt 7 again, and the reset torsion spring 4 can apply pressing force to the unlocking arm plate 2 in the locking state, so that the reliable locking of the trigger plate 3 and the lock leaf 5 is ensured, and the lock leaf 5 is ensured to be always in the locking state.

In conclusion, the technical scheme provided by the utility model overcomes the defects in the prior art, successfully completes the utility model task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. A seatback lock for a vehicle seat, comprising: the device comprises an accommodating box body (1) fixedly arranged on the backrest of the vehicle seat, an unlocking arm plate (2), a trigger plate (3), a reset torsion spring (4), a locking blade (5), an unlocking rod (6) and a lock plunger (7) arranged on the vehicle body; the containing box body (1) is hollow and is provided with a box body inner cavity (11), the unlocking arm plate (2) and the trigger plate (3) are arranged in the box body inner cavity (11) in a side-by-side state and are pivoted with the containing box body (1), one end part of the unlocking arm plate (2) is extended out of the containing box body (1) and is fixedly connected with an unlocking rod (6) arranged outside the containing box body (1), the reset torsion spring (4) is also arranged in the box body inner cavity (11) and is abutted against a spring arm at one end of the reset torsion spring (4) and a plate body of the unlocking arm plate (2), the other end spring arm of the reset torsion spring (4) is fixed on the containing box body (1), the trigger plate (3) is also connected with a trigger plate stop lever (31), and an arc-shaped part (21) matched with the trigger plate stop lever (31) is formed on the outer edge surface of the unlocking arm plate (2), and a trigger plate locking surface (32) is formed on the outer edge surface of the trigger plate (3), the lock leaf (5) is also arranged in the box body inner cavity (11) and is pivoted with the accommodating box body (1), a lock leaf matching surface (51) is formed on the outer edge surface of the lock leaf (5) and at the position corresponding to the trigger plate locking surface (32), the lock leaf matching surface (51) is matched and connected with the trigger plate locking surface (32), a lock groove (52) is formed on the lock leaf (5) in a concave mode, and the lock bolt (7) is clamped in the lock groove (52).

2. The backrest lock for the vehicle seat as claimed in claim 1, wherein the accommodating case (1) is composed of a positioning case (12) and a mounting plate (13) which are fastened to each other, a flange is formed at a circumferential edge position of the positioning case (12), a positioning case connecting shaft (121) and a positioning case locking vane shaft (122) both extending toward the mounting plate (13) are further connected to the positioning case (12), a mounting plate connecting shaft (131) and a mounting plate locking vane shaft (132) are also formed on the mounting plate (13), the positioning case connecting shaft (121) and the mounting plate connecting shaft (131) are disposed correspondingly, and the positioning case locking vane shaft (122) and the mounting plate locking vane shaft (132) are disposed correspondingly; the trigger plate (3) is further provided with a trigger plate sleeve (33) extending towards the positioning shell (12), the trigger plate sleeve (33) is pivoted on the positioning shell connecting shaft (121), the unlocking arm plate (2) is pivoted on the mounting plate connecting shaft (131), a lock blade pivot hole (53) is formed in the body of the lock blade (5) and in the position corresponding to the positioning shell lock blade shaft (122) and the mounting plate lock blade shaft (132), and the positioning shell lock blade shaft (122) and the mounting plate lock blade shaft (132) both extend into the lock blade pivot hole (53) and are pivoted with the same, so that the lock blade (5) is rotatably connected with the accommodating box body (1).

3. The backrest lock for a vehicle seat according to claim 2, wherein the reset torsion spring (4) is integrally coiled on the trigger plate sleeve (33), and an unlocking arm plate stopper protrusion (22) is protrudingly formed on the unlocking arm plate (2) at a position corresponding to one end spring arm of the reset torsion spring (4), the unlocking arm plate stopper protrusion (22) abuts against one end spring arm of the reset torsion spring (4), and a torsion spring positioning groove (123) is concavely formed on the positioning housing (12) at a position corresponding to the other end spring arm of the reset torsion spring (4), and the other end spring arm of the reset torsion spring (4) is accommodated in the torsion spring positioning groove (123).

4. The backrest lock for vehicle seat as claimed in claim 1, characterized in that a plastic coating is provided on the outer surface of the locking blade (5).

5. The backrest lock for vehicle seat as claimed in claim 1, wherein a lock groove pad cover (521) is further fitted in the lock groove (52) of the lock leaf (5).

6. The backrest lock for a vehicle seat as claimed in claim 1, characterized in that said latch (7) is a U-shaped latch having a U-shaped opening.