A two-way unlocking structure for a car seat backrest

Abstract

The present invention relates to a two-way unlocking structure for a car seat backrest, comprising a recliner connecting rod, a connecting rod I equipped with a handle, a fixing plate, a return spring, a connecting rod II and a folding unlocking brake wire; the upper and lower ends of the connecting rod II are respectively connected to the recliner connecting rod and the connecting rod I for transmission connection, and the recliner connecting rod is connected to the unlocking backrest adjuster for transmission connection through a square rod; rotating the connecting rod I can drive the folding unlocking brake wire to move downward; the two ends of the return spring are respectively connected to the fixing plate and the connecting rod I; when the handle is operated upward, the connecting rod I can drive the connecting rod II, and the connecting rod II drives the recliner connecting rod to rotate upward, and the recliner connecting rod drives the square rod to rotate; when it rotates to a certain angle, the backrest recliner can be unlocked; when the handle is operated downward, the connecting rod I pulls the folding unlocking brake wire to unlock the backrest folding recliner. The present invention has a simple structure, can realize two-way unlocking of the recliner, adopts a four-link structure, and the limit unlocking angle of the backrest is reduced from 33° to 12°, saving the space of the handle for operation.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile seats, and in particular relates to a two-way automobile seat backrest unlocking structure. Background Art

[0002] The existing automobile seat back unlocking structure generally controls the back lock through an unlocking handle installed on a handle bracket. The handle bracket is a plastic part. In order to ensure that the unlocking handle is smoothly connected to the handle bracket, a certain gap is usually left between the handle shaft and the shaft mounting hole on the handle bracket. Although this design structure can facilitate the installation of the handle, it is easy to cause shaking and abnormal noise during use due to the gap.

[0003] The prior art discloses a car seat back unlocking mechanism, which includes an unlocking piece with one end connected to the unlocking center shaft of the recliner and the other end forming an unlocking end, a forward unlocking lever with one end pivotally arranged on the lower connecting plate of the recliner and the other end forming a forward driving end, a connecting rod with one end pivotally arranged on the lower connecting plate of the recliner and the other end rotatably connected to the rear unlocking lever, and a rear unlocking lever with one end connected to the unlocking end and the other end forming a rear driving end and rotatably connected to the connecting rod. This backrest unlocking mechanism is limited to one-way unlocking of the recliner and cannot realize unlocking in other ways.

[0004] At the same time, the handle rotation space of our GN-C project customers is small, and the original handle structure cannot meet the handle space requirements, and the original handle structure cannot simultaneously meet the backrest angle adjustment and backrest folding adjustment functions. Based on this, it is urgent to develop a two-way car seat back unlocking structure that can save handle operation space. Summary of the invention

[0005] The purpose of the present invention is to provide a two-way car seat back unlocking structure to address the deficiencies of the above-mentioned prior art, so as to save handle operation space while meeting the problems of backrest angle adjustment and backrest folding adjustment.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A two-way vehicle seat back unlocking structure, comprising a recliner connecting rod, a connecting rod II equipped with a handle, a fixing plate, a return spring, a connecting rod I and a folding unlocking brake wire;

[0008] The upper and lower ends of the connecting rod I are respectively connected to the recliner connecting rod and the connecting rod II in a transmission manner, and the connecting rod I and the recliner connecting rod can move relative to each other; the recliner connecting rod is connected to the unlocking backrest adjuster in a transmission manner through a square rod;

[0009] One end of the folding unlocking wire is fixed in the opening of the connecting rod II, and the other end is fixed to the folding angle adjuster of the backrest. Rotating the connecting rod II can drive the folding unlocking wire to move downward, and the displacement of the folding unlocking wire drives the folding angle adjuster of the backrest to rotate and unlock;

[0010] The two ends of the return spring are connected to the fixed plate and the connecting rod II respectively, a rivet column with a thread is arranged inside the return spring, the connecting rod II is sleeved on the rivet column, the rivet column is riveted to the fixed plate, and the return spring is sleeved outside the rivet column;

[0011] When the handle is operated upward and connecting rod II rotates upward, connecting rod II can drive connecting rod I, connecting rod I drives the recliner connecting rod to rotate upward, and the recliner connecting rod drives the square rod to rotate; when it rotates to a certain angle, the backrest recliner can be unlocked; when the handle is operated downward, connecting rod II pulls the center fold unlocking wire to unlock the center fold recliner of the backrest.

[0012] Furthermore, one end of the square rod passes through the recliner connecting rod and is welded thereto, and the other end passes through the backrest recliner and cooperates therewith. Rotating the square rod can drive the backrest angle recliner to rotate, thereby achieving unlocking.

[0013] Furthermore, an oblong hole and a circular hole are respectively formed at the upper and lower ends of the connecting rod I.

[0014] Furthermore, the upper and lower ends of the connecting rod I are respectively connected to the angle adjuster connecting rod and the connecting rod II through rivets, and a self-lubricating sleeve is provided at the connection.

[0015] Furthermore, one end of the folding unlocking brake wire is inserted into the opening of the connecting rod II and is fixed to the connecting rod II by a brake wire clamping rivet.

[0016] Furthermore, the fixing plate is provided with a hook for connecting a fixed end of a return spring.

[0017] Furthermore, the other fixed end of the return spring is fixed by a connecting rod II with a flange on the inner side.

[0018] Furthermore, when the connecting rod II is rotated to an angle of 12°, the backrest angle adjuster can be unlocked.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The two-way unlocking structure of the automobile seat backrest of the present invention has a simple structure and an ingenious design, and can realize two-way unlocking of the recliner. The structure adopts a four-link structure, and the limit unlocking angle of the backrest is reduced from 33° to 12°, saving handle space for operation; 2. Two-way unlocking is realized through the idle travel on the connecting rod I; 3. The operating force arm is lengthened to reduce handle operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 Structural schematic diagram of the two-way car seat back unlocking structure. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with embodiments:

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] like Figure 1 As shown, the two-way automobile seat backrest unlocking structure of the present invention is composed of a recliner connecting rod, a connecting rod II, a rivet, a lubricating sleeve, a fixing plate, a return spring, a connecting rod I and a folding unlocking brake wire.

[0027] The upper and lower ends of the connecting rod I are respectively connected to the recliner connecting rod and the connecting rod II. The connecting rod II and the recliner connecting rod can move relative to each other. The recliner connecting rod is connected to the unlocking backrest adjuster through a square rod. One end of the square rod passes through the recliner connecting rod and is welded to it, and the other end passes through the backrest recliner to cooperate with it. Rotating the square rod can drive the backrest angle adjuster to rotate and unlock it. The connecting rod II, the connecting rod I, the recliner connecting rod and the square rod form a four-bar linkage.

[0028] The backrest adjuster is fixed on the angle adjuster connecting plate, and the angle adjuster connecting plate is composed of two plates, which are respectively arranged at the front and rear ends of the backrest adjuster.

[0029] Specifically, an oblong hole and a round hole are respectively opened at the upper and lower ends of the connecting rod I, and the upper and lower ends of the connecting rod I are respectively connected to the angle adjuster connecting rod and the connecting rod II through rivets, and a self-lubricating sleeve is provided at the connection.

[0030] The handle is mounted on the connecting rod II. One end of the center fold unlocking wire is inserted into the opening of the connecting rod II and fixed to the connecting rod II through the wire clamping rivet, and the other end is fixed to the center folding angle adjuster of the backrest. By rotating the connecting rod II, the center fold unlocking wire is driven to move downward, and the displacement of the center fold unlocking wire drives the center folding angle adjuster of the backrest to rotate and unlock.

[0031] The two ends of the return spring are connected to the fixed plate and the connecting rod II respectively, and a hook is provided on the fixed plate. A rivet column with a thread is provided inside the return spring, and the connecting rod II is sleeved on the rivet column. The rivet column is riveted to the fixed plate, and the return spring is sleeved outside the rivet column. One fixed end of the return spring is fixed to the hook on the fixed plate, and the other fixed end is fixed by the connecting rod II with a flange on the inside, which can help the connecting rod II return to its original position when it moves.

[0032] When the handle is operated upward and connecting rod II rotates upward, connecting rod II drives connecting rod I, connecting rod I drives the angle adjuster connecting rod to rotate upward, and the angle adjuster connecting rod drives the square rod to rotate. When it rotates to a certain angle, the backrest angle adjuster can be unlocked to achieve backrest angle adjustment. When the handle is operated downward, connecting rod II pulls the folding unlocking gate line to unlock the backrest folding angle adjuster to achieve backrest folding adjustment. The backrest folding angle adjuster is fixed on another angle adjuster connecting plate. The backrest folding angle adjuster is located above the backrest adjuster, and the upper end of the folding unlocking gate line is not shown in the figure.

[0033] In the prior art, connecting rod II is the backrest unlocking handle, which is directly connected to the backrest adjuster. When unlocking, connecting rod II needs to be adjusted. When it is rotated to 23°, it is the critical unlocking angle, and when it is rotated to 33°, it is the limit unlocking angle. Due to the shape limitation, connecting rod II cannot complete the above stroke and its stroke must be reduced. The two-way car seat backrest unlocking structure of the present invention adopts a four-bar linkage mechanism, that is, connecting rod II drives connecting rod I, and connecting rod I drives the angle adjuster connecting rod to rotate upward. By adjusting connecting rod II, the present invention can realize that the backrest adjuster needs to be rotated to 33° when connecting rod II is rotated to 12°, and the backrest adjuster is unlocked.

[0034] Usually, the backrest angle adjuster can only rotate in one direction, not in two directions, and can only be rotated upward to rotate and unlock. When the connecting rod II of the present invention rotates upward, the backrest angle adjuster can be unlocked to achieve the backrest angle adjustment. The opening at the upper end of the connecting rod I is an oblong hole, and the idle stroke is set to allow the connecting rod I to move downward. When the handle is operated downward, the connecting rod II moves downward to pull the folding unlocking brake wire, unlocking the backrest folding angle adjuster and achieving the adjustment of the backrest folding.

[0035] Since the shorter the lever arm, the greater the required operating force. The connecting rod I is farther from the rotating shaft, and the farther from the rotating shaft, the longer the lever arm, and the smaller the force. Therefore, the present invention lengthens the operating lever arm and reduces the handle operation.

[0036] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A two-way vehicle seat back unlocking structure, characterized in that: It includes a recliner connecting rod, a connecting rod II equipped with a handle, a fixing plate, a return spring, a connecting rod I and a center-folding unlocking brake wire; The upper and lower ends of the connecting rod I are respectively connected to the recliner connecting rod and the connecting rod II in a transmission manner, and the connecting rod I and the recliner connecting rod can move relative to each other; the recliner connecting rod is connected to the unlocking backrest adjuster in a transmission manner through a square rod; One end of the folding unlocking wire is fixed in the opening of the connecting rod II, and the other end is fixed to the folding angle adjuster of the backrest. Rotating the connecting rod II can drive the folding unlocking wire to move downward, and the displacement of the folding unlocking wire drives the folding angle adjuster of the backrest to rotate and unlock; The two ends of the return spring are connected to the fixed plate and the connecting rod II respectively, a rivet column with a thread is arranged inside the return spring, the connecting rod II is sleeved on the rivet column, the rivet column is riveted to the fixed plate, and the return spring is sleeved outside the rivet column; When the handle is operated upward and connecting rod II rotates upward, connecting rod II can drive connecting rod I, connecting rod I drives the recliner connecting rod to rotate upward, and the recliner connecting rod drives the square rod to rotate; when it rotates to a certain angle, the backrest recliner can be unlocked; when the handle is operated downward, connecting rod II pulls the center fold unlocking wire to unlock the backrest center fold recliner; One end of the square rod passes through the recliner connecting rod and is welded thereto, and the other end passes through the backrest recliner and cooperates therewith. Rotating the square rod can drive the backrest recliner to rotate and achieve unlocking. The connecting rod I has an oblong hole and a round hole at the upper and lower ends respectively.

2. A two-way vehicle seat back unlocking structure according to claim 1, characterized in that: The upper and lower ends of the connecting rod I are respectively connected to the angle adjuster connecting rod and the connecting rod II through rivets, and a self-lubricating sleeve is arranged at the connection.

3. A two-way vehicle seat back unlocking structure according to claim 1, characterized in that: One end of the center-folding unlocking brake wire is inserted into the opening of the connecting rod II and is fixed to the connecting rod II through a brake wire clamping rivet.

4. The two-way vehicle seat back unlocking structure according to claim 1, characterized in that: The fixing plate is provided with a hook for connecting a fixing end of a return spring.

5. A two-way vehicle seat back unlocking structure according to claim 4, characterized in that: The other fixed end of the return spring is fixed by a connecting rod II with a flange on the inner side.

6. The two-way vehicle seat back unlocking structure according to claim 1, characterized in that: When the connecting rod II is rotated to an angle of 12°, the backrest angle adjuster can be unlocked.

Images