Seat backrest unfolding structure

Abstract

The utility model belongs to the technical field of child car seats, and particularly relates to a seat backrest unfolding structure. Comprising a base body, a left back cushion, a right back cushion and a linkage assembly, wherein the left back cushion and the right back cushion are hinged to the bottoms of the two sides of the base body respectively; the linkage assembly is arranged on the base body and connected with the left back cushion and the right back cushion; the driving part is connected with the linkage assembly and is used for driving the linkage assembly to drive the left back cushion and the right back cushion to be unfolded in a fan shape in the direction far away from the base body. According to the seat backrest unfolding structure, the left back cushion and the right back cushion are hinged to the bottoms of the two sides of the base body respectively, and the linkage assembly drives the left back cushion and the right back cushion to be unfolded relative to the base body in a fan-shaped mode, so that stress points are concentrated on the top in the unfolding process, and the width of the backrest can be adjusted more smoothly; resistance and jamming in the operation process are reduced, a user can adjust the seat more conveniently and rapidly, and it is guaranteed that a baby can be better protected and experience comfortable in the vehicle driving process.

Description

Technical field

[0002] The present application belongs to the technical field of child car seats, and in particular relates to a seat back deployment structure. [Background Technology]

[0004] Infant car seats are safety seats designed specifically for infants, typically used to protect children while in motion. Traditional infant car seats typically have a fixed backrest width that cannot be adjusted, making them inconvenient to use. This has led to the emergence of expandable infant car seats. However, existing expandable seats primarily utilize a backrest that moves horizontally relative to one another. This integrally movable expansion mechanism can easily become stuck during adjustment, making it difficult to operate. [Utility Model Content]

[0006] In order to solve the problem of easy jamming when adjusting the width of the child car seat back in the prior art, the present application provides a seat back deployment structure.

[0007] This application is achieved through the following technical solutions:

[0008] A seat backrest expansion structure includes a base body, a left cushion and a right cushion respectively hinged to the bottom of both sides of the base body, a linkage component provided on the base body and connected to the left cushion and the right cushion respectively, and an active component connected to the linkage component and used to drive the linkage component to drive the left cushion and the right cushion to fan out in a direction away from the base body.

[0009] In the seat back deployment structure as described above, the linkage assembly includes a first moving member connected to the left back cushion, a second moving member connected to the right back cushion, and a linkage member for causing the first moving member and the second moving member to move synchronously in opposite directions.

[0010] In the seat back deployment structure as described above, the first movable member is provided with a first rack, the second movable member is provided with a second rack, the linkage member is provided with gear teeth, and the gear teeth are engaged with the first rack and the second rack.

[0011] In the seat back deployment structure as described above, the base body is provided with a sliding groove for the active member to pass through the base body and connect with the first moving member.

[0012] In the seat back deployment structure as described above, the bottoms of the left and right cushions are hinged to the base body respectively, and the tops of the left and right cushions are hinged to the first moving member and the second moving member respectively.

[0013] The seat backrest expansion structure as described above also includes a limiting mechanism for keeping the first movable member and the second movable member in linear movement, the limiting mechanism including a plurality of first limiting columns arranged on the inner wall of the base body, and first limiting grooves arranged on the first movable member and the second movable member and through which each of the first limiting columns passes; or including a plurality of second limiting columns arranged on the inner wall of the base body, and second limiting grooves arranged on the first movable member and the second movable member and through which a plurality of the second limiting columns pass.

[0014] In the seat backrest expansion structure as described above, the first movable member is provided with a left positioning column, the left back cushion is provided with a left connecting groove for inserting the left positioning column, the second movable member is provided with a right positioning column, and the right back cushion is provided with a right connecting groove for inserting the right positioning column.

[0015] The seat back deployment structure as described above further includes a two-way locking mechanism for maintaining or releasing the positioning of the active member relative to the sliding groove.

[0016] As described above, the seat back deployment structure, the two-way locking mechanism includes a locking block slidably connected to the active member and passing through the active member and the base body, a tongue provided at the bottom of the locking block, and a slot provided on the inner wall of the base body for the tongue to be inserted into. When the tongue moves downward relative to the active member, the tongue disengages from the slot to release the positioning of the active member and the sliding slot. When the tongue moves upward relative to the active member, the tongue inserts into the slot to keep the active member and the sliding slot in position.

[0017] The seat back deployment structure as described above includes a plurality of the latching grooves sequentially arranged along the sliding groove.

[0018] Compared with the prior art, this application has the following advantages:

[0019] The seat backrest expansion structure of the present application is provided with a left cushion and a right cushion respectively hinged to the bottom of both sides of the base body, and then driven by a linkage component to fan-shapely expand the left cushion and the right cushion relative to the base body, so that the force point during expansion is concentrated on the top, the backrest width can be adjusted more smoothly, and the resistance and jamming during operation are reduced. The user can adjust the seat more conveniently and quickly, ensuring that the baby is better protected and comfortable during driving.

Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 It is a three-dimensional stereogram in the embodiment of the present application;

[0023] Figure 2 yes Figure 1 An enlarged schematic diagram of the front side of the internal structure;

[0024] Figure 3 yes Figure 1 An enlarged schematic diagram of the rear side of the internal structure;

[0025] Figure 4 yes Figure 2 The main view;

[0026] Figure 5 This is a state diagram of an embodiment of the present application. Figure 1 ;

[0027] Figure 6 This is a state diagram of an embodiment of the present application. Figure 2 ;

[0028] Figure 7 yes Figure 6 Schematic diagram of the internal structure. [Specific implementation method]

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0031] See also Figures 1 to 7 A seat backrest expansion structure includes a base body 1, a left cushion 2 and a right cushion 3 hinged to the bottom of both sides of the base body 1, a linkage component 4 provided on the base body 1 and connected to the left cushion 2 and the right cushion 3, and an active member 5 connected to the linkage component 4 and used to drive the linkage component 4 to drive the left cushion 2 and the right cushion 3 to fan out in a direction away from the base body 1.

[0032] The seat backrest expansion structure of the present application is provided with a left cushion and a right cushion respectively hinged to the bottom of both sides of the base body, and then driven by a linkage component to fan-shapely expand the left cushion and the right cushion relative to the base body, so that the force point during expansion is concentrated on the top, the backrest width can be adjusted more smoothly, and the resistance and jamming during operation are reduced. The user can adjust the seat more conveniently and quickly, ensuring that the baby is better protected and comfortable during driving.

[0033] Furthermore, as a preferred embodiment of the present invention but not a limitation, the linkage assembly 4 includes a first movable member 41 connected to the left cushion 2, a second movable member 42 connected to the right cushion 3, and a linkage member 43 for making the first movable member 41 and the second movable member 42 move synchronously in opposite directions.

[0034] In the present embodiment, because the seat is in use, usually only the back contacts backrest, and the waist position contact surface is less, therefore realizes fanning out by the synchronous reverse movement of the first mobile member 41 and the second mobile member 42, thereby regulates the backrest width of the seat.This design has avoided the easy block problem that occurs in the traditional overall translation mode, has improved the smoothness of the adjustment process and the convenience of use.In addition, the setting of linkage member 43 has guaranteed the synchronous motion of the first mobile member 41 and the second mobile member 42, makes adjustment more stable and reliable.Linkage assembly 4 can be adjusted according to actual demand, for example linkage assembly adopts the mode of gear transmission, realizes that the reverse synchronous movement of the first mobile member and the second mobile member or mode first mobile member such as chain transmission moves by rotating gear, and the transmission by linkage member is that the second mobile member is the relative first mobile member synchronous reverse movement.

[0035] Furthermore, as a preferred embodiment of the present invention but not a limitation, a first rack 411 is provided on the first movable member 41, a second rack 421 is provided on the second movable member 42, and gear teeth 431 are provided on the linkage member 43, and the gear teeth 431 are engaged with the first rack 411 and the second rack 421.

[0036] In the present embodiment, the first moving member and the second moving member are respectively located at the upper and lower sides of the linkage member and are arranged in parallel, thereby realizing the accurate synchronous reverse movement between the first moving member 41 and the second moving member 42. Through the engagement of gear teeth 431 with the first rack 411 and the second rack 421, the linkage member 43 can drive the two moving members simultaneously, ensuring that they maintain consistent motion direction and speed during the adjustment process. This transmission mode has the advantages of good self-locking performance, high transmission accuracy, and smooth operation, which can effectively reduce the stuck position and shaking phenomenon, and improve the stability and comfort of the seat adjustment. The transmission mode can adopt other forms, for example, adopt gear transmission, belt transmission, chain transmission, etc., to achieve the same synchronous reverse movement effect.

[0037] Furthermore, as a preferred embodiment of the present invention but not limiting, the base body 1 is provided with a sliding groove 11 for the active member 5 to pass through the base body 1 and connect with the first moving member 41 .

[0038] In this embodiment, a sliding groove 11 is provided in the base body 1, allowing the active member 5 to pass through the base body 1 and connect with the first movable member 41, thereby driving the linkage assembly 4. The provision of the sliding groove 11 provides guidance and support for the movement of the active member 5, enabling it to stably drive the first movable member 41 to adjust the width of the seat back. This design simplifies the transmission structure, reduces the number of components, and improves the reliability and maintenance ease of the entire system.

[0039] Furthermore, as a preferred embodiment of the present invention but not a limitation, the bottoms of the left cushion 2 and the right cushion 3 are respectively hinged to the base body 1, and the tops of the left cushion 2 and the right cushion 3 are respectively hinged to the first movable member 41 and the second movable member 42.

[0040] In this embodiment, the hinged structure allows the backrest to rotate around the hinge point during adjustment, enabling flexible adjustment of the backrest width and angle to accommodate infants of different sizes and different seating requirements. This design improves the adaptability and comfort of the seat while also simplifying the adjustment process and making it more convenient for the user.

[0041] Furthermore, as a preferred embodiment of the present invention but not a limitation, it also includes a limiting mechanism 6 for keeping the first movable member 41 and the second movable member 42 in linear motion, and the limiting mechanism includes a plurality of first limiting columns 61 provided on the inner wall of the base body 1, and a first limiting groove 62 provided on the first movable member 41 and the second movable member 42 and for each of the first limiting columns 61 to pass through in a one-to-one correspondence; or includes a plurality of second limiting columns 63 provided on the inner wall of the base body 1, and a second limiting groove 64 provided on the first movable member 41 and the second movable member 42 and for a plurality of the second limiting columns 63 to pass through.

[0042] In the present embodiment, it is possible to ensure that the first moving member 41 and the second moving member 42 keep moving in a straight line during the adjustment process, thereby avoiding the offset or stuck phenomenon caused by lateral force or manufacturing error. By arranging a plurality of first limiting posts 61 or the second limiting posts 63 on the base body 1 inner wall, and respectively cooperating with the first limiting groove 62 and the second limiting groove 64 on the first moving member 41 and the second moving member 42, or cooperating with the second limiting groove 64 by a plurality of second limiting posts 63 to form an accurate guiding and limiting system, so that the two moving members can stably and smoothly carry out synchronous reverse movement. The specific structural form of the limiting mechanism 6 can be adjusted according to actual needs, for example, adopting other forms of guiding devices such as the cooperation of guide groove and guide block, linear bearing, etc.

[0043] Furthermore, as a preferred embodiment of the present invention but not a limitation, a left positioning column 412 is provided on the first movable member 41, a left connecting groove 21 is provided on the left cushion 2 for inserting the left positioning column 412, a right positioning column 422 is provided on the second movable member 42, and a right connecting groove 31 is provided on the right cushion 3 for inserting the right positioning column 422.

[0044] In this embodiment, the quick positioning and connection between the back cushion and the moving part is achieved. The coordinated use of the positioning column and the connecting groove can improve the assembly efficiency and reliability of the back cushion and the moving part.

[0045] Furthermore, as a preferred embodiment of this solution but not a limitation, it further includes a two-way locking mechanism 7 for maintaining or releasing the positioning of the active member 5 relative to the sliding groove 11 .

[0046] In this embodiment, the provision of a double-lock mechanism 7 can lock the active member 5, thereby improving the safety of seat adjustment. During the adjustment process, the active member 5 needs to move within the sliding slot 11 to drive the linkage assembly 4. The double-lock mechanism 7 can lock the active member 5 in a specific position when needed to prevent it from accidentally moving or loosening.

[0047] Furthermore, as a preferred embodiment of the present invention but not a limitation, the two-way locking mechanism 7 includes a locking block 71 that is slidably connected to the active member 5 and passes through the active member 5 and the base body 1, a tongue 711 provided at the bottom of the locking block 71, and a slot 72 provided on the inner wall of the base body 1 for the tongue 711 to be snapped into. When the tongue 711 moves downward relative to the active member 5, the tongue 711 disengages from the slot 72 to release the positioning of the active member 5 and the sliding slot 11; when the tongue 711 moves upward relative to the active member 5, the tongue 711 snaps into the slot 72 to keep the active member 5 and the sliding slot 11 in position.

[0048] In this embodiment, the design of the locking block 71 and the latching tongue 711 facilitates the locking and unlocking of the active member 5. The locking block 71 is slidably connected to the active member 5 and passes through the active member 5 and the base body 1. The latching tongue 711 is located at the bottom of the locking block 71 and is configured to engage with the slot 72 on the inner wall of the base body 1. When the active member 5 needs to be locked, the latching tongue 711 moves upward and engages with the slot 72, thereby positioning the active member 5. When the active member 5 needs to be unlocked, the latching tongue 711 moves downward and disengages from the slot 72, releasing the active member 5 from its position. This design is simple to operate and provides a quick response, meeting the locking requirements during seat adjustment.

[0049] Furthermore, as a preferred embodiment of this solution but not a limitation, it includes a plurality of the locking grooves 72 sequentially arranged along the sliding groove 11 .

[0050] In this embodiment, the active member 5 can be locked and fine-tuned in multiple stages. By engaging the latching tongue 711 with the latching slots 72 at different locations, the active member 5 can be precisely positioned within the sliding slot 11, thereby enabling multi-stage adjustment of the seat back width. This design can meet the needs of infants of different sizes, improving the seat's adaptability and comfort.

[0051] The working principle of this embodiment is as follows:

[0052] The seat backrest expansion structure of the present application is provided with a left cushion and a right cushion respectively hinged to the bottom of both sides of the base body, and then driven by a linkage component to fan-shapely expand the left cushion and the right cushion relative to the base body, so that the force point during expansion is concentrated on the top, the backrest width can be adjusted more smoothly, and the resistance and jamming during operation are reduced. The user can adjust the seat more conveniently and quickly, ensuring that the baby is better protected and comfortable during driving.

[0053] The above are implementation methods provided in conjunction with specific content, and the specific implementation of this application is not limited to these descriptions. Any method structure that is similar to the method structure of this application, or any technical deduction or replacement based on the concept of this application, should be considered as the scope of protection of this application.

Claims

1. A seat back deployment structure, characterized in that: The invention comprises a base body (1), a left back cushion (2) and a right back cushion (3) respectively hinged to the bottom of both sides of the base body (1), a linkage assembly (4) provided on the base body (1) and connected to the left back cushion (2) and the right back cushion (3), and an active member (5) connected to the linkage assembly (4) and used to drive the linkage assembly (4) to drive the left back cushion (2) and the right back cushion (3) to fan out in a direction away from the base body (1).

2. The seat back deployment structure according to claim 1, characterized in that: The linkage assembly (4) comprises a first moving member (41) connected to the left back cushion (2), a second moving member (42) connected to the right back cushion (3), and a linkage member (43) for causing the first moving member (41) and the second moving member (42) to move synchronously in opposite directions.

3. The seat back deployment structure according to claim 2, characterized in that: The first moving member (41) is provided with a first rack (411), the second moving member (42) is provided with a second rack (421), the linkage member (43) is provided with gear teeth (431), and the gear teeth (431) are engaged with the first rack (411) and the second rack (421).

4. The seat back deployment structure according to claim 2, characterized in that: The base body (1) is provided with a sliding groove (11) for the active member (5) to pass through the base body (1) and connect with the first moving member (41).

5. The seat back deployment structure according to claim 2, characterized in that: The bottoms of the left back cushion (2) and the right back cushion (3) are respectively hinged to the base body (1), and the tops of the left back cushion (2) and the right back cushion (3) are respectively hinged to the first moving member (41) and the second moving member (42).

6. The seat back deployment structure according to claim 2, characterized in that: The invention also includes a limiting mechanism (6) for keeping the first movable member (41) and the second movable member (42) moving in a straight line, wherein the limiting mechanism includes a plurality of first limiting posts (61) provided on the inner wall of the base body (1), and first limiting grooves (62) provided on the first movable member (41) and the second movable member (42) and for each of the first limiting posts (61) to pass through in a one-to-one correspondence; or includes a plurality of second limiting posts (63) provided on the inner wall of the base body (1), and second limiting grooves (64) provided on the first movable member (41) and the second movable member (42) and for each of the second limiting posts (63) to pass through.

7. The seat back deployment structure according to claim 2, characterized in that: The first movable member (41) is provided with a left positioning column (412), the left back cushion (2) is provided with a left connecting groove (21) for inserting the left positioning column (412), the second movable member (42) is provided with a right positioning column (422), and the right back cushion (3) is provided with a right connecting groove (31) for inserting the right positioning column (422).

8. The seat back deployment structure according to claim 4, characterized in that: It also includes a two-way locking mechanism (7) for maintaining or releasing the positioning of the active member (5) relative to the sliding slot (11).

9. The seat back deployment structure according to claim 8, characterized in that: The two-way locking mechanism (7) comprises a locking block (71) which is slidably connected to the active member (5) and passes through the active member (5) and the base body (1), a latch (711) provided at the bottom of the locking block (71), and a slot (72) provided on the inner wall of the base body (1) for the latch (711) to be latched in. When the latch (711) moves downward relative to the active member (5), the latch (711) disengages from the slot (72) to release the positioning of the active member (5) and the sliding slot (11); when the latch (711) moves upward relative to the active member (5), the latch (711) latches in the slot (72) to maintain the positioning of the active member (5) and the sliding slot (11).

10. The seat back deployment structure according to claim 9, characterized in that: It comprises a plurality of the clamping slots (72) arranged in sequence along the sliding slot (11).

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