A child safety seat backrest adjustment mechanism

Abstract

This utility model discloses a backrest adjustment mechanism for a child safety seat, comprising: an operating component having a rotation axis, the operating component being rotatable relative to the backrest around the rotation axis; a transmission assembly including a transmission component and a linkage component, the transmission component having a hinge point, the transmission component being rotatable relative to the backrest around the hinge point, the transmission component having a first end and a second end, the first end being linked with the operating component, and the second end being linked with the linkage component; a locking assembly including a locking component and a shift structure, the locking component being linked with the second end through the linkage component, the shift structure having several shift grooves that cooperate with the locking component; and a reset component, the reset component always having a tendency to lock the locking component with the shift grooves; the locking component can be disengaged from the shift groove under the drive of the operating component to release the lock, and the rotation of the operating component around the rotation axis replaces the traditional sliding adjustment, shortening the travel of the operating component and effectively saving installation space.

Description

Technical Field

[0001] This utility model relates to the field of child safety seat technology, and in particular to a backrest adjustment mechanism for a child safety seat. Background Technology

[0002] In traditional child safety seats, the backrest adjustment mechanism typically uses a sliding handle to adjust the gear position by sliding up and down or back and forth. Existing backrest adjustment mechanisms usually include a handle, a locking mechanism, and a spring-loaded element for resetting the locking mechanism. The backrest usually has a gear slot that engages with the locking mechanism. By pulling the handle, the locking mechanism is disengaged from the current gear slot. Pulling the handle to the new gear slot and then releasing the handle allows the locking mechanism to reset and lock into the new gear slot under the action of the spring-loaded element, thus achieving gear adjustment. To meet the basic requirement of unlocking the locking mechanism, the handle's sliding travel must be long enough. However, a long sliding travel of the handle occupies a significant amount of space, thus necessitating improvement. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a backrest adjustment mechanism for a child safety seat. The mechanism has a simple and reasonable structure and is easy to operate. The operating component rotates around the rotation axis instead of the traditional sliding adjustment, which shortens the travel distance of the operating component and effectively saves installation space.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The present invention relates to a backrest adjustment mechanism for a child safety seat, comprising: An operating element having a rotation axis, the operating element being rotatable relative to the backrest about the rotation axis; A transmission assembly, comprising a transmission component and a linkage component, wherein the transmission component has a hinge point and is rotatable relative to the backrest about the hinge point, and the transmission component has a first end and a second end, wherein the first end is linked to an operating component and the second end is linked to the linkage component. A locking assembly, comprising a locking element and a shift structure, wherein the locking element is linked to the second end via a linkage element, and the shift structure has a plurality of shift grooves that cooperate with the locking element; The reset component always has a tendency to lock the locking component with the gear slot; The locking element can be disengaged from the gear slot by the operation element to release the lock.

[0005] Furthermore, the gear shift structure includes a gear shift member fixedly connected to the backrest. The gear shift member has a slide rail and a plurality of gear shift slots. Each gear shift slot communicates with the slide rail. When the locking member disengages from the corresponding gear shift slot, it can slide along the slide rail to another gear shift slot.

[0006] Furthermore, adjacent gear slots are spaced apart.

[0007] Furthermore, the gear slot is configured as an inclined slot.

[0008] Furthermore, the operating component includes a gripping part, an abutting part, and a rotating part. A rotating shaft is inserted inside the rotating part, and the rotating axis is the axis of the rotating shaft. The abutting part abuts against the first end.

[0009] Furthermore, the gripping part, the contacting part, and the rotating part are integrally formed.

[0010] Furthermore, the locking member includes a locking part, which is arranged in an L-shape or approximately L-shape, and the locking part is inserted into the gear slot and locked in place with the gear slot.

[0011] Furthermore, the locking member is connected to the backrest via a connector, the locking member has a waist-shaped groove, the waist-shaped groove is arranged along the moving direction of the locking member, and the connector is located within the waist-shaped groove.

[0012] Furthermore, the linkage component is a pull rod, and the two ends of the pull rod are respectively limited or fixedly connected to the second end and the locking component.

[0013] Furthermore, the reset component is a torsion spring, and the two ends of the torsion spring are respectively connected to the locking component and the backrest for limiting or fixing.

[0014] The beneficial effects of this utility model are as follows: The child safety seat backrest adjustment mechanism of this utility model uses a handle that rotates around the axis of rotation instead of the traditional sliding adjustment, which shortens the movement stroke of the handle and effectively saves installation space. Users can easily drive the transmission component by using the handle. The lever structure of the transmission component centered on the hinge point amplifies the operating force and reduces the force required for unlocking. The reset component automatically drives the locking component to reset, eliminating the need for manual return to position, making operation convenient and labor-saving. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the present invention from a first-view perspective; Figure 2 This is a structural schematic diagram of the present invention from a second perspective; Figure 3 This is a schematic diagram of the structure when the locking element is locked to the gear slot; Figure 4It is a partially enlarged structural diagram of the connection between the rotating shaft, operating components, transmission components, and linkage components; Figure 5 This is a schematic diagram of the structure of this utility model in its working state; Figure 6 This is a structural diagram of the handles and backrest.

[0016] Figures 1-6 middle: 1. Operating components; 11. Grip part; 12. Contact part; 13. Rotating part; 14. Rotation axis; 2. Gear shifter; 21. Slide rail; 22. Gear shifter groove; 3. Transmission components; 31. Hinge point; 32. First end; 33. Second end; 331. Limiting groove; 4. Torsion spring; 5. Locking components; 51. Waist-shaped groove; 511. Second screw; 52. Locking part; 53. First socket; 54. Second socket; 6. Linkage components; 7. Backrest; 71. First screw; 72. Clearance groove. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figures 1-6 The backrest adjustment mechanism for a child safety seat shown includes: an operating component 1. In this embodiment, the operating component 1 is a handle. The handle has a rotation axis and can rotate relative to the backrest 7 around the rotation axis. The backrest 7 is provided with a relief groove 72 that cooperates with the handle.

[0019] The transmission assembly includes a transmission component 3 and a linkage component 6. The transmission component 3 is hinged to the backrest 7. The transmission component 3 has a hinge point 31. The transmission component 3 can rotate relative to the backrest 7 around the hinge point 31. The transmission component 3 has a first end 32 and a second end 33. The first end 32 is linked to the operating component 1, and the second end 33 is linked to the linkage component 6. Preferably, in this embodiment, refer to Figures 1-2The linkage 6 is a pull rod, and the two ends of the pull rod are respectively limited or fixedly connected to the second end 33 and the locking member 5. Both ends of the pull rod are U-shaped. The second end 33 is provided with a limiting groove 331, and the locking member 5 is provided with a first insertion hole 53. One end of the pull rod is limited and engaged with the limiting groove 331, and the other end of the pull rod is inserted into the first insertion hole 53 and limited and engaged with the first insertion hole 53.

[0020] Locking component, see Figures 1-3 The locking assembly includes a locking member 5 and a shift structure. The locking member 5 is linked to the second end 33 via a linkage member 6. The shift structure has several shift grooves 22 that cooperate with the locking member 5. Preferably, in this embodiment, the shift structure includes a shift member 2 fixedly connected to the backrest 7. The shift member 2 has a slide rail 21 and several shift grooves 22. Preferably, in this embodiment, adjacent shift grooves 22 are spaced apart, and multiple shift grooves 22 can be provided to achieve multi-level adjustment. Each shift groove 22 is connected to the slide rail 21. When the locking member 5 disengages from the corresponding shift groove 22, it can slide along the slide rail 21 to another shift groove 22.

[0021] Reset component, see reference Figure 3 The reset component always has a tendency to lock the locking component 5 and the gear slot 22. Preferably, in this embodiment, the reset component is a torsion spring 4, and the two ends of the torsion spring 4 are respectively limited or fixedly connected to the locking component 5 and the backrest 7.

[0022] Specifically, see Figure 3 The backrest 7 is fixedly connected to a first screw 71. Both ends of the torsion spring 4 are U-shaped. The locking member 5 has a second insertion hole 54. One end of the torsion spring 4 is inserted into the second insertion hole 54 and is limited to the second insertion hole 54. The other end of the torsion spring 4 is sleeved on the outside of the first screw 71 and is limited to the first screw 71.

[0023] The locking member 5 can be disengaged from the gear slot 22 under the drive of the operating member 1 to release the lock and realize the adjustment of the backrest 7 gear position.

[0024] The present invention discloses a backrest adjustment mechanism for a child safety seat. The handle rotates around the axis of rotation instead of the traditional sliding adjustment, which shortens the movement of the handle and effectively saves installation space. The user can easily drive the transmission component by pulling the handle. The lever structure of the transmission component 3 centered on the hinge point 31 amplifies the operating force and reduces the force required for unlocking. The reset component automatically drives the locking component 5 to reset, eliminating the need for manual return. The operation is convenient and labor-saving.

[0025] Preferably, in this embodiment, refer to Figure 3 The gear slot 22 is configured as an inclined slot, and the locking member 5 can slide along the gear slot 22.

[0026] Preferably, in this embodiment, refer to Figure 4 The handle includes a gripping part 11, an abutting part 12, and a rotating part 13. Preferably, in this embodiment, the gripping part 11, the abutting part 12, and the rotating part 13 are integrally formed. A rotating shaft 14 is inserted inside the rotating part 13. The two ends of the rotating shaft 14 are fixedly connected to the backrest 7. The axis of rotation is the axis of the rotating shaft 14. The abutting part 12 abuts against the first end 32. When the handle rotates around the axis, the abutting part 12 acts on the first end 32 of the transmission member 3.

[0027] Preferably, in this embodiment, refer to Figure 3 The locking member 5 includes a locking part 52, which is L-shaped or approximately L-shaped. The locking part 52 is inserted into the gear position groove 22 and locked in place with the gear position groove 22. The L-shaped locking part 52 can effectively prevent accidental disengagement during adjustment.

[0028] Preferably, in this embodiment, refer to Figures 1-3 The locking member 5 is connected to the backrest 7 via a connector. The locking member 5 has a waist-shaped groove 51, which is arranged along the moving direction of the locking member 5. The connector is located inside the waist-shaped groove 51. The waist-shaped groove 51 provides guidance for the sliding of the locking member 5. The connector is a second screw 511, which is fixedly connected to the backrest 7. By cooperating with the waist-shaped groove 51, the locking member 5 becomes more stable during movement, reducing the problem of inaccurate adjustment caused by shaking or displacement.

[0029] The working principle of this utility model is as follows: Initial locking state: Under the preload of the torsion spring 4, the L-shaped locking part 52 of the locking member 5 is inserted into the current gear slot 22, thereby locking and fixing the backrest 7 and the gear member 2. At this time, the handle is in the initial position.

[0030] Unlocking Operation: When the backrest angle 7 needs to be adjusted, the user holds the handle 11 and rotates it around the rotation axis. The abutment part 12 abuts against the first end 32 of the transmission member 3, pressing down the first end 32, causing the transmission member 3 to rotate around the hinge point 31, causing the second end 33 of the transmission member 3 to tilt upward. Since the second end 33 of the transmission member 3 is connected to the locking member 5 through the pull rod, the rotation of the transmission member 3 is converted into a linear pull of the pull rod, which in turn causes the locking member 5 to overcome the elastic force of the reset member and move along the direction of the waist-shaped groove 51, causing the L-shaped locking part 52 to disengage from the current gear slot 22 and release the locking state.

[0031] Gear shifting: After the locking member 5 disengages from the gear position slot 22, it slides along the slide rail 21 on the gear position member 2. The slide rail 21 connects to the adjacent gear position slot 22, forming a transition channel. The locking member 5 slides along the slide rail 21 until it reaches the target gear position slot 22. The handle is then released, and the torsion spring 4 drives the locking member 5 to move, causing the L-shaped locking part 52 to insert into the new gear position slot 22, thus re-establishing the locking engagement. Simultaneously, the locking member 5 drives the transmission component 3 to reset via the pull rod. The transmission component 3 pushes the handle back to its initial position, completing the entire gear shifting cycle.

[0032] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A backrest adjustment mechanism for a child safety seat, characterized in that, include: An operating element (1) has a rotation axis and is rotatable about the rotation axis relative to the backrest (7); The transmission assembly includes a transmission component (3) and a linkage component (6). The transmission component (3) has a hinge point (31) and can rotate about the hinge point (31) relative to the backrest (7). The transmission component (3) has a first end (32) and a second end (33). The first end (32) is linked to the operating component (1), and the second end (33) is linked to the linkage component (6). The locking assembly includes a locking member (5) and a shift structure. The locking member (5) is linked to the second end (33) through a linkage member (6). The shift structure has a plurality of shift grooves (22) that cooperate with the locking member (5). The reset component always has a tendency to lock the locking component (5) and the gear slot (22); The locking element (5) can be disengaged from the gear slot (22) by the operation element (1) to release the lock.

2. The backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The gear shift structure includes a gear shift member (2) fixedly connected to the backrest (7). The gear shift member (2) has a slide (21) and a plurality of gear shift slots (22). Each gear shift slot (22) is connected to the slide (21). When the locking member (5) disengages from the corresponding gear shift slot (22), it can slide along the slide (21) to another gear shift slot (22).

3. The backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The two adjacent gear slots (22) are spaced apart.

4. The backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The gear slot (22) is configured as an inclined slot.

5. The backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The operating component (1) includes a gripping part (11), an abutting part (12) and a rotating part (13). A rotating shaft (14) is inserted inside the rotating part (13). The rotating shaft is the axis of the rotating shaft (14). The abutting part (12) abuts against the first end (32).

6. The backrest adjustment mechanism for a child safety seat according to claim 5, characterized in that: The gripping part (11), the contact part (12), and the rotating part (13) are integrally formed.

7. The backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The locking member (5) includes a locking part (52), which is arranged in an L-shape or approximately L-shape. The locking part (52) is inserted into the gear slot (22) and locks into the gear slot (22).

8. The backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The locking member (5) is connected to the backrest (7) via a connector. The locking member (5) has a waist-shaped groove (51) which is arranged along the moving direction of the locking member (5). The connector is located in the waist-shaped groove (51).

9. The backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The linkage (6) is a pull rod, and the two ends of the pull rod are respectively limited or fixedly connected to the second end (33) and the locking member (5).

10. A backrest adjustment mechanism for a child safety seat according to claim 1, characterized in that: The reset component is a torsion spring (4), and the two ends of the torsion spring (4) are respectively limited or fixedly connected to the locking component (5) and the backrest (7).

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