A multi-gear adjusting lock mechanism for a back seat backrest

Abstract

A back seat backrest multi-gear adjustment lock catch mechanism, including the lower slide plate, the upper slide plate and the slide rail, the upper side of the upper slide plate is fixedly provided with backrest connecting steel wire, the upper slide plate and the lower slide plate are set on the slide rail through the slide groove, the slide rail is provided with the locking hole, the upper slide plate is provided with the first positioning pin hole, the first positioning pin hole is provided with the positioning pin, the upper of the positioning pin is provided with the cover, the cover is provided with the second positioning pin hole, the upper end of the positioning pin extends into the second positioning pin hole, the side of the positioning pin is fixedly provided with the limit ring, the positioning pin is equipped with the spring, the outside of the cover is provided with the claw arm, the first end of the claw arm extends to below the limit ring, the utility model discloses integrated design, not only realizes the automobile back seat backrest multi-gear adjustment, still will adjust the mechanism to concentrate in a compact cover, claw arm mechanism with multiple locking holes, greatly reduces the overall volume and the occupied space of mechanism.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and more particularly to automobile seat structures, especially a multi-position adjustable locking mechanism for rear seat backrests. Background Technology

[0002] Adjustable rear seat backrests can improve passenger comfort, but current technology only allows switching between sitting and reclining positions, lacking multi-position adjustment and flexibility. Furthermore, existing backrest adjustment mechanisms are complex and space-consuming, hindering interior space optimization and contradicting the trend towards lightweight and compact automotive design. Utility Model Content

[0003] The purpose of this utility model is to provide a multi-position adjustable locking mechanism for rear seat backrests, which solves the technical problems of existing car rear seat backrests not being able to achieve multi-position adjustment, having complex structures, and occupying a large space.

[0004] This utility model provides a multi-position adjustable locking mechanism for a rear seat backrest, including a lower sliding plate, an upper sliding plate, and a slide rail. The upper sliding plate and the lower sliding plate are fixedly connected. A backrest connecting steel wire is fixedly installed on the upper side of the upper sliding plate. A slide groove is provided between the upper and lower sliding plates. The upper and lower sliding plates are fitted onto the slide rail through the slide groove. The slide rail extends in an arc shape. The upper and lower sliding plates and the slide rail form a sliding pair along the extension direction of the slide rail. At least two locking holes are provided at intervals along the extension direction of the slide rail. Limit structures are provided at both ends of the slide rail. At least one first positioning pin hole is provided in the upper sliding plate. Each of the first positioning pin holes is equipped with a locking mechanism. A locating pin has its lower end inserted into a locking hole. A cover is provided above the locating pin and is fixedly connected to the upper slide plate. The cover has a second locating pin hole with the same number and position as the first locating pin hole. The upper end of the locating pin extends into the second locating pin hole. The locating pin, the first locating pin hole, and the second locating pin hole form an axial sliding pair. A limit ring is fixedly provided on the side of the locating pin. A spring is sleeved on the locating pin between the limit ring and the cover. The spring biases the locating pin downward through the limit ring. A hinge is fixedly provided on the outer side of the cover. The hinge is hinged to the middle of a claw arm through a rotating shaft. The first end of the claw arm extends into the cover and extends to below the limit ring.

[0005] Furthermore, the first end of the claw arm is provided with a semi-circular groove that mates with the positioning pin.

[0006] Furthermore, the number of positioning pins is three.

[0007] Furthermore, a torsion spring is provided on the rotating shaft, and the two torsion arms of the torsion spring are respectively connected to the cover and the claw arm.

[0008] Furthermore, a buffer washer is fitted around the outer periphery of the positioning pin on the lower side of the limiting ring.

[0009] Furthermore, the upper and lower sliding plates are fixed to the cover by rivets.

[0010] Compared with the prior art, the effects of this utility model are positive and obvious. This utility model adopts an integrated design, which not only realizes multi-position adjustment of the rear seat back of the car, but also concentrates the adjustment mechanism into a slide rail with multiple locking holes and a compact cover and claw arm mechanism, which greatly reduces the overall size and space occupied by the mechanism. Attached Figure Description

[0011] Figure 1 This is a first perspective view of a multi-position adjustable locking mechanism for the rear seat backrest according to the present invention.

[0012] Figure 2 This is a second perspective view of a multi-position adjustable locking mechanism for the rear seat backrest according to the present invention.

[0013] Figure 3 This is a first schematic diagram of the inside of the cover of a multi-position adjustable locking mechanism for the rear seat back of this utility model.

[0014] Figure 4 This is a second schematic diagram of the interior of the cover of a multi-position adjustable locking mechanism for the rear seat backrest according to this utility model.

[0015] Figure 5 This is an exploded view of a multi-position adjustable locking mechanism for the rear seat backrest according to the present invention.

[0016] Figure 6 This is a front view schematic diagram of a multi-position adjustable locking mechanism for the rear seat backrest according to the present invention.

[0017] Figure 7 This is a top view schematic diagram of a multi-position adjustable locking mechanism for the rear seat backrest according to the present invention. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included within the protection scope of the present invention. The use of directions such as up, down, front, back, left, right, center, inside, and outside in the present invention is only for the convenience of clear description and is not intended to limit the technical solution of the present invention.

[0019] like Figures 1-7As shown, this utility model provides a multi-position adjustable locking mechanism for a rear seat backrest, including a lower sliding plate 1, an upper sliding plate 2, and a slide rail 3. The upper sliding plate 2 is fixedly connected to the lower sliding plate 1. A backrest connecting wire 4 is fixedly installed on the upper side of the upper sliding plate 2. A slide groove is provided between the upper sliding plate 2 and the lower sliding plate 1. The upper sliding plate 2 and the lower sliding plate 1 are fitted onto the slide rail 3 through the slide groove. The slide rail 3 extends in an arc shape. The upper sliding plate 2, the lower sliding plate 1, and the slide rail 3 form a sliding pair along the extension direction of the slide rail 3. At least two locking holes 5 are provided at intervals along the extension direction of the slide rail 3. Limit structures 15 are respectively provided at both ends of the slide rail 3. At least one first positioning pin hole 6 is provided in the upper sliding plate 2. A positioning pin 7 passes through each of the first positioning pin holes 6. The lower end of the positioning pin 7 extends into the locking hole 5. A cover 8 is provided above the positioning pin 7. The cover 8 is fixedly connected to the upper slide plate 2. The cover 8 is provided with a second positioning pin hole 9, which is the same number and position as the first positioning pin hole 6. The upper end of the positioning pin 7 extends into the second positioning pin hole 9. The positioning pin 7, the first positioning pin hole 6, and the second positioning pin hole 9 form an axial sliding pair. A limit ring 10 is fixedly provided on the side of the positioning pin 7. A spring 11 is sleeved on the positioning pin 7 between the limit ring 10 and the cover 8. The spring 11 biases the positioning pin 7 downward through the limit ring 10. A hinge seat 12 is fixedly provided on the outer side of the cover 8. The hinge seat 12 is hinged to the middle of a claw arm 14 through a rotating shaft 13. The first end of the claw arm 14 extends into the cover 8 and extends to the lower part of the limit ring 10.

[0020] The working principle of this embodiment:

[0021] Installation method: The backrest connecting steel wire piece 4 is fixedly installed to the seat backrest frame, and the slide rail 3 is fixedly installed to the vehicle body frame.

[0022] In use, first manually move the second end of the claw arm 14. The claw arm 14 rotates around the pivot 13. The first end of the claw arm 14 moves upward through the limit ring 10, causing the positioning pin 7 to move upward. The spring 11 is compressed, and the lower end of the positioning pin 7 disengages from the locking hole 5 of the first slide rail 3, thus unlocking the upper slide plate 2, the lower slide plate 1 and the slide rail 3. Then rotate the seat back to adjust to the required angle. The seat back moves the upper slide plate 2 and the lower slide plate 1 along the slide rail 3 through the backrest connecting steel wire 4. Then release the claw arm 14. The spring 11 returns to its original position, causing the positioning pin 7 to move downward and insert into the corresponding locking hole 5. The claw arm 14 resets, and the upper slide plate 2, the lower slide plate 1 and the slide rail 3 are locked, thus locking the seat back angle.

[0023] This utility model can be locked by a single positioning pin 7 engaging with a single locking hole 5, or by two or more positioning pins 7 engaging with a single locking hole 5.

[0024] This utility model adopts an integrated design, which not only realizes multi-position adjustment of the rear seat back of the car, but also concentrates the adjustment mechanism into a slide rail 3 with multiple locking holes 5 and a compact cover 8 and claw arm 14 mechanism, which greatly reduces the overall volume and space occupied by the mechanism.

[0025] Furthermore, the first end of the claw arm 14 is provided with a semi-circular groove that mates with the positioning pin 7.

[0026] Furthermore, the number of positioning pins 7 is three.

[0027] Furthermore, a torsion spring 16 is provided on the rotating shaft 13, and the two torsion arms of the torsion spring 16 are respectively connected to the cover 8 and the claw arm 14. The torsion spring 16 makes the reset position of the claw arm 14 more accurate.

[0028] Furthermore, a buffer washer 17 is sleeved on the lower side of the limiting ring 10 on the outer periphery of the positioning pin 7 to reduce the noise caused by the impact between the positioning pin 7 and the lower sliding plate 1.

[0029] Furthermore, the upper sliding plate 2, the lower sliding plate 1, and the cover 8 are fixed together by rivets 18.

Claims

1. A multi-step adjustment lock mechanism for a backrest of a rear seat, characterized in that, The system includes a lower slide plate, an upper slide plate, and a slide rail. The upper slide plate and the lower slide plate are fixedly connected. A backrest connecting steel wire is fixedly installed on the upper side of the upper slide plate. A slide groove is provided between the upper and lower slide plates. The upper and lower slide plates are fitted onto the slide rail through the slide groove. The slide rail extends in an arc shape. The upper and lower slide plates and the slide rail form a sliding pair along the extension direction of the slide rail. At least two locking holes are provided at intervals along the extension direction of the slide rail. Limit structures are provided at both ends of the slide rail. At least one first positioning pin hole is provided in the upper slide plate. A positioning pin passes through each of the first positioning pin holes. The lower end of the positioning pin extends... A cover is provided above the locking pin in the locking hole. The cover is fixedly connected to the upper slide plate. The cover has a second positioning pin hole with the same number and position as the first positioning pin hole. The upper end of the positioning pin extends into the second positioning pin hole. The positioning pin, the first positioning pin hole, and the second positioning pin hole form an axial sliding pair. A limit ring is fixedly provided on the side of the positioning pin. A spring is sleeved on the positioning pin between the limit ring and the cover. The spring biases the positioning pin downward through the limit ring. A hinge seat is fixedly provided on the outside of the cover. The hinge seat is hinged to the middle of a claw arm through a rotating shaft. The first end of the claw arm extends into the cover and extends to the bottom of the limit ring.

2. The multi-stage adjustment lock mechanism of the back seat backrest according to claim 1, characterized in that, The first end of the claw arm is provided with a semi-circular groove that mates with the positioning pin.

3. The multi-stage adjustment lock mechanism of the back seat backrest according to claim 1, characterized in that, The number of positioning pins is three.

4. The multi-stage recliner lock mechanism of claim 1, wherein, A torsion spring is provided on the rotating shaft, and the two torsion arms of the torsion spring are respectively connected to the cover and the claw arm.

5. The multi-stage recliner lock mechanism of claim 1, wherein, A buffer washer is fitted around the outer periphery of the positioning pin on the lower side of the limiting ring.

6. The multi-stage recliner lock mechanism of claim 1, wherein, The upper and lower sliding plates are fixed to the cover by rivets.

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