Child safety seat backrest adjusting and locking mechanism

Abstract

The utility model discloses a child safety seat backrest adjusting and locking mechanism, and relates to the technical field of child safety seats. The child safety seat backrest adjusting and locking mechanism comprises a seat bottom frame, a rotating shaft rotationally arranged on the inner wall of the seat bottom frame and a backrest frame rotationally arranged on the inner wall of the seat bottom frame through the rotating shaft. The braking assembly comprises a fixing plate fixedly arranged on the inner wall of the seat bottom frame and a lifting plate arranged on the inner wall of the seat bottom frame in a sliding mode, a strip-shaped groove is formed in the upper surface of the fixing plate, and a double-shaft motor used for driving the lifting plate to ascend and descend is fixedly arranged on the inner wall of the strip-shaped groove. By arranging the brake assembly, the double-shaft motor can be started to enable the lifting plate to move upwards, and the two straight toothed plates on the upper surface of the lifting plate are meshed with the two toothed discs respectively, so that the rotating shaft is effectively braked, the purpose of effectively braking the adjusted backrest plate is further achieved, and the stability of the backrest plate is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of child safety seats, in particular to a backrest adjustment and locking mechanism for a child safety seat. Background Art

[0002] In the actual use of the child safety seat, the angle of its backrest can be adjusted as needed. The existing patent is a stepless adjustment mechanism for the backrest angle of a car child safety seat, and the patent authorization announcement number is CN216033942U. It includes a backrest frame and a base frame that are hinged to each other. A driving mechanism is arranged between the backrest frame and the base frame. The driving mechanism includes a driving seat and a screw rod screwed in the driving seat. The tail end of the screw rod is rotatably arranged in the screw rod seat and driven by a motor. The outer ends of the driving seat and the screw rod seat are respectively hinged to the backrest frame and the base frame. The adjustment mechanism also includes a control mechanism for controlling the start and stop of the motor. The stepless adjustment mechanism for the backrest angle of the car child safety seat provided by the utility model can greatly improve the comfort of child passengers riding in the car child seat.

[0003] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: during the actual process of adjusting the backrest angle of the child safety seat, the stepless adjustment mechanism of the backrest angle lacks a component for effectively locking the backrest after adjusting it to a suitable angle, resulting in a certain burden on the adjustment mechanism after the backrest is subjected to force, thereby affecting the service life of the adjustment mechanism.

[0004] Therefore, we propose a child safety seat backrest adjustment locking mechanism to solve the above-mentioned problems. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a child safety seat backrest adjustment and locking mechanism, which solves the problem that the backrest plate after adjustment cannot be braked.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a child safety seat backrest adjustment and locking mechanism, comprising:

[0007] A seat frame, a rotating shaft rotatably arranged on an inner wall of the seat frame, and a backrest frame rotatably arranged on the inner wall of the seat frame via the rotating shaft;

[0008] An adjustment assembly, which is used to adjust the angle of the backrest frame, the adjustment assembly includes a mounting plate fixedly mounted on the inner wall of the seat bottom frame, and a slide plate slidably mounted on the upper surface of the mounting plate, a plurality of adjustment rods are equidistantly arranged on the surface of the slide plate, and one end of the adjustment rod away from the slide plate is rotatably connected to the surface of the backrest frame, and the adjustment assembly also includes a driving motor arranged on the side of the mounting plate for driving the slide plate to move;

[0009] A brake assembly is used to brake the backrest frame, the brake assembly includes a fixed plate fixedly mounted on the inner wall of the seat frame, and a lifting plate slidably mounted on the inner wall of the seat frame, the upper surface of the fixed plate is provided with a strip groove, and the inner wall of the strip groove is provided with a double-axis motor for driving the lifting plate to lift and lower, both output ends of the double-axis motor are provided with lead screws, and the thread directions of the two lead screws are opposite, the brake assembly also includes two toothed discs symmetrically fixedly mounted on the outer surfaces of both ends of the rotating shaft, and straight toothed plates symmetrically fixedly mounted on the upper surface of the lifting plate and corresponding to the two toothed discs respectively.

[0010] Preferably, a rectangular groove is opened on the upper surface of the mounting plate, the slide plate is slidably connected to the inner wall of the rectangular groove, a threaded column is rotatably provided on the inner wall of the rectangular groove, and the output end of the driving motor extends to the interior of the rectangular groove and is fixedly connected to the end of the threaded column.

[0011] Preferably, two symmetrical fixing rods are fixedly provided on the inner wall of the rectangular groove, and the side surface of the slide plate is respectively provided with threaded holes threadedly connected to the outer surface of the threaded column, and two sliding holes slidably connected to the outer surfaces of the two fixing rods.

[0012] Preferably, a connecting strip is fixedly provided on the surface of the backrest frame, and a plurality of corresponding rotation grooves are equidistantly provided on the surfaces of the connecting strip and the slide plate, and both ends of the adjusting rod are rotationally connected to the inner walls of the rotation grooves on the surfaces of the slide plate and the connecting strip, respectively.

[0013] Preferably, two symmetrical moving blocks are slidably provided on the inner wall of the strip groove, and threaded holes threadedly connected to the outer surfaces of the two lead screws are respectively opened on the side surfaces of the two moving blocks.

[0014] Preferably, two symmetrical fixed blocks are fixed on the lower surface of the lifting plate, and connecting grooves are provided on the surfaces of the moving block and the fixed block, and a push rod is rotatably provided on the inner wall of the connecting groove on the surface of the moving block, and one end of the push rod away from the moving block is rotatably connected to the inner wall of the connecting groove on the surface of the fixed block.

[0015] Preferably, both ends of the lifting plate are fixedly provided with limit sliding blocks, and both side inner walls of the seat frame are provided with limit sliding grooves for sliding of the two limit sliding blocks. Beneficial Effects

[0016] The utility model provides a child safety seat backrest adjustment and locking mechanism. Compared with the prior art, it has the following beneficial effects:

[0017] The child safety seat backrest adjustment locking mechanism, by providing a brake assembly, can start the dual-axis motor to move the lifting plate upward, and make the two spur gear plates on the upper surface of the lifting plate mesh with the two gear plates respectively, thereby achieving effective braking of the rotating shaft, and further achieving the purpose of effectively braking the adjusted backrest plate, thereby effectively improving the stability of the backrest plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the fixing plate of the utility model;

[0021] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0022] In the figure:

[0023] 100. Seat frame;

[0024] 200, rotating shaft;

[0025] 300, backrest frame;

[0026] 400, adjustment assembly; 401, mounting plate; 402, slide plate; 403, adjustment rod; 404, drive motor; 405, threaded column; 406, fixing rod;

[0027] 500, brake assembly; 501, fixed plate; 502, lifting plate; 503, dual-axis motor; 504, lead screw; 505, gear plate; 506, spur plate; 507, moving block; 508, push rod; 509, limit slider; 5010, limit slide groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 The utility model provides a technical solution: a child safety seat backrest adjustment and locking mechanism, comprising:

[0030] A seat frame 100, a rotating shaft 200 rotatably disposed on an inner wall of the seat frame 100, and a backrest frame 300 rotatably disposed on an inner wall of the seat frame 100 via the rotating shaft 200;

[0031] An adjustment assembly 400, which is used to adjust the angle of the backrest frame 300, includes a mounting plate 401 fixed to the inner wall of the seat frame 100, and a slide plate 402 slidably arranged on the upper surface of the mounting plate 401, a plurality of adjustment rods 403 are equidistantly arranged on the surface of the slide plate 402, and one end of the adjustment rod 403 away from the slide plate 402 is rotatably connected to the surface of the backrest frame 300, and the adjustment assembly 400 also includes a drive motor 404 arranged on the side of the mounting plate 401 for driving the slide plate 402 to move;

[0032] A rectangular groove is provided on the upper surface of the mounting plate 401, and the slide plate 402 is slidably connected to the inner wall of the rectangular groove. A threaded column 405 is rotatably provided on the inner wall of the rectangular groove, and the output end of the driving motor 404 extends to the inside of the rectangular groove and is fixedly connected to the end of the threaded column 405. The rotation of the driving motor 404 can drive the slide plate 402 to slide on the inner wall of the rectangular groove.

[0033] Two symmetrical fixing rods 406 are fixed on the inner wall of the rectangular groove, and the side of the slide plate 402 is respectively provided with threaded holes threadedly connected to the outer surface of the threaded column 405, and two sliding holes slidably connected to the outer surfaces of the two fixing rods 406, which can ensure the stability of the slide plate 402 during sliding under the action of the fixing rods 406.

[0034] A connecting strip is fixedly provided on the surface of the backrest frame 300, and a number of corresponding rotation grooves are equidistantly provided on the surfaces of the connecting strip and the slide plate 402. The two ends of the adjusting rod 403 are rotationally connected to the inner walls of the rotation grooves on the surfaces of the slide plate 402 and the connecting strip, respectively, so that the adjusting rod 403 can smoothly push the backrest frame 300.

[0035] The child safety seat backrest adjustment and locking mechanism, by providing an adjustment component 400, can realize automatic adjustment of the use angle of the backrest board by rotating the driving motor 404. Moreover, this threaded transmission method enables the backrest frame 300 to rotate stably during adjustment. At the same time, the provision of multiple adjustment rods 403 can make the surface force of the backrest frame 300 more uniform, effectively ensuring the stability of the backrest frame 300 during rotation.

[0036] The brake assembly 500 is used to brake the backrest frame 300. The brake assembly 500 includes a fixed plate 501 fixedly mounted on the inner wall of the seat frame 100, and a lifting plate 502 slidably mounted on the inner wall of the seat frame 100. A strip groove is provided on the upper surface of the fixed plate 501, and a dual-axis motor 503 for driving the lifting plate 502 to rise and fall is fixedly mounted on the inner wall of the strip groove. A lead screw 504 is fixedly mounted at both output ends of the dual-axis motor 503, and the thread directions of the two lead screws 504 are opposite. The brake assembly 500 also includes two toothed discs 505 symmetrically fixedly mounted on the outer surfaces of both ends of the rotating shaft 200, and a straight tooth plate 506 symmetrically fixedly mounted on the upper surface of the lifting plate 502 and corresponding to the two toothed discs 505 respectively.

[0037] Two symmetrical moving blocks 507 are slidably disposed on the inner wall of the strip groove, and threaded holes threadedly connected to the outer surfaces of the two lead screws 504 are respectively opened on the sides of the two moving blocks 507 .

[0038] Two symmetrical fixed blocks are fixed on the lower surface of the lifting plate 502, and connecting grooves are opened on the surfaces of the moving block 507 and the fixed block, and a push rod 508 is rotatably arranged on the inner wall of the connecting groove on the surface of the moving block 507, and one end of the push rod 508 away from the moving block 507 is rotatably connected to the inner wall of the connecting groove on the surface of the fixed block.

[0039] Limiting slide blocks 509 are fixedly disposed at both ends of the lifting plate 502 , and limiting sliding grooves 5010 for the two limiting slide blocks 509 to slide are provided on both inner walls of the seat frame 100 .

[0040] The child safety seat backrest adjustment locking mechanism is provided with a brake assembly 500. After the backrest board of the child seat is adjusted, the dual-axis motor 503 can be started to move the lifting plate 502 upward, and the two straight tooth plates 506 on the upper surface of the lifting plate 502 are respectively engaged with the two toothed plates 505 to achieve effective braking of the rotating shaft 200, thereby achieving the purpose of effectively braking the adjusted backrest board, and effectively improving the stability of the backrest board.

[0041] During operation, when the angle of the backrest board is adjusted, the rotation of the driving motor 404 can drive the threaded column 405 to rotate, the rotation of the threaded column 405 drives the slide plate 402 to move, and the movement of the slide plate 402 drives a plurality of adjustment rods 403 to push the backrest frame 300, thereby realizing automatic adjustment of the use angle of the backrest board. Moreover, this method of adopting threaded transmission can make the backrest frame 300 rotate stably during adjustment. At the same time, the setting of multiple adjustment rods 403 can make the surface force of the backrest frame 300 more uniform, which effectively ensures that the backrest frame 300 is rotated during rotation. The stability of the child seat can be improved by starting the dual-axis motor 503 to drive the two lead screws 504 to rotate simultaneously after the backrest board of the child seat is adjusted. The rotation of the two lead screws 504 drives the two moving blocks 507 to move to both sides at the same time, thereby driving the two push rods 508 to push the lifting plate 502, so that the lifting plate 502 moves upward, and the two straight tooth plates 506 on the upper surface of the lifting plate 502 are respectively engaged with the two toothed plates 505, so as to achieve effective braking of the rotating shaft 200, thereby achieving the purpose of effectively braking the adjusted backrest board, and effectively improving the stability of the backrest board.

[0042] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A child safety seat backrest adjustment and locking mechanism, characterized in that: include, A seat bottom frame (100), a rotating shaft (200) rotatably arranged on the inner wall of the seat bottom frame (100), and a backrest frame (300) rotatably arranged on the inner wall of the seat bottom frame (100) via the rotating shaft (200); An adjustment component (400) for adjusting the angle of a backrest frame (300), the adjustment component (400) comprising a mounting plate (401) fixedly mounted on the inner wall of a seat bottom frame (100), and a slide plate (402) slidably mounted on the upper surface of the mounting plate (401), a plurality of adjustment rods (403) being equidistantly arranged on the surface of the slide plate (402), and an end of the adjustment rod (403) away from the slide plate (402) being rotatably connected to the surface of the backrest frame (300), the adjustment component (400) further comprising a drive motor (404) mounted on a side of the mounting plate (401) for driving the slide plate (402) to move; A brake assembly (500) for braking a backrest frame (300), the brake assembly (500) comprising a fixed plate (501) fixedly mounted on the inner wall of a seat bottom frame (100), and a lifting plate (502) slidably mounted on the inner wall of the seat bottom frame (100), the upper surface of the fixed plate (501) being provided with a strip groove, and the inner wall of the strip groove being provided with a double-axis motor (503) for driving the lifting plate (502) to move up and down, both output ends of the double-axis motor (503) being provided with a lead screw (504), and the thread directions of the two lead screws (504) being opposite, the brake assembly (500) further comprising two toothed discs (505) symmetrically fixedly mounted on the outer surfaces of both ends of the rotating shaft (200), and straight toothed plates (506) symmetrically fixedly mounted on the upper surface of the lifting plate (502) and corresponding to the two toothed discs (505) respectively.

2. A child safety seat backrest adjustment and locking mechanism according to claim 1, characterized in that: A rectangular groove is provided on the upper surface of the mounting plate (401), the sliding plate (402) is slidably connected to the inner wall of the rectangular groove, a threaded column (405) is rotatably provided on the inner wall of the rectangular groove, and the output end of the driving motor (404) extends into the interior of the rectangular groove and is fixedly connected to the end of the threaded column (405).

3. A child safety seat backrest adjustment and locking mechanism according to claim 2, characterized in that: Two symmetrical fixing rods (406) are fixedly arranged on the inner wall of the rectangular groove, and the side surface of the slide plate (402) is respectively provided with threaded holes threadedly connected to the outer surface of the threaded column (405) and two sliding holes slidably connected to the outer surfaces of the two fixing rods (406).

4. The child safety seat backrest adjustment and locking mechanism according to claim 1, characterized in that: A connecting strip is fixedly provided on the surface of the backrest frame (300), and a plurality of corresponding rotation grooves are equidistantly provided on the surfaces of the connecting strip and the slide plate (402), and the two ends of the adjustment rod (403) are respectively rotationally connected to the inner walls of the rotation grooves on the surfaces of the slide plate (402) and the connecting strip.

5. The child safety seat backrest adjustment and locking mechanism according to claim 1, characterized in that: Two symmetrical moving blocks (507) are slidably arranged on the inner wall of the strip-shaped groove, and threaded holes threadedly connected to the outer surfaces of the two lead screws (504) are respectively opened on the sides of the two moving blocks (507).

6. The child safety seat backrest adjustment and locking mechanism according to claim 5, characterized in that: Two symmetrical fixed blocks are fixedly arranged on the lower surface of the lifting plate (502), and connecting grooves are provided on the surfaces of the moving block (507) and the fixed block, and a push rod (508) is rotatably arranged on the inner wall of the connecting groove on the surface of the moving block (507), and one end of the push rod (508) away from the moving block (507) is rotatably connected to the inner wall of the connecting groove on the surface of the fixed block.

7. The child safety seat backrest adjustment and locking mechanism according to claim 1, characterized in that: Limiting slide blocks (509) are fixedly provided at both ends of the lifting plate (502), and limiting sliding grooves (5010) for sliding of the two limiting slide blocks (509) are provided on the inner walls on both sides of the seat bottom frame (100).

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