Child lock device of automobile rear door
By simplifying the structure of the child lock device and utilizing the cooperation of the lever base and the internal unlocking block, the problems of complex structure and high cost of existing child lock devices are solved, and a low-cost child lock function is achieved.
Patent Information
- Application Number
- CN202520011843.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing child lock devices for car rear doors have complex structures and high operating costs.
A child lock device with an unlocking mechanism is adopted. It has a simple structure and utilizes the cooperation of a lever seat, an inner unlocking block and a rotatable locking block. The lever drives the rotatable locking block to rotate to achieve unlocking and locking. A torsion spring is used to achieve reset, and the U-shaped structure in the middle prevents unlocking.
It features a child lock function, a simple overall structure, and low operating costs.
Smart Images
Figure CN223922826U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive lock technology, specifically to a child lock device for the rear door of a car. Background Technology
[0002] Child locks are an essential device on rear doors. When locked, they effectively prevent children from opening the door if they accidentally operate the inside door handle, providing excellent safety protection. Currently, the most common types are manual lever-type and key-operated knob-type. The manual lever-type has a lever on the door, which is used to lock and unlock the door by moving it to different positions. However, the existing lever-type structure is complex and has a high operating cost. Summary of the Invention
[0003] To solve the above-mentioned technical problems, this utility model provides a child lock device for the rear door of a car, which has a simple structure and low operating cost.
[0004] The technical solution is as follows: A child lock device for the rear door of a car includes an unlocking mechanism, which includes a rotating transmission block that cooperates with a door lock unlocking block. The device further includes an inner unlocking block, an inner unlocking lever, and a lever seat. Both the inner unlocking block and the inner unlocking lever are rotatably mounted on an inner unlocking shaft. One end of the inner unlocking block is provided with an inner unlocking head, and the rotating transmission block is provided with an inner unlocking transmission head that cooperates with the inner unlocking head. The other end of the inner unlocking block is provided with a rotatable lock block. The lever seat is rotatably connected to the door lock housing. When the lever seat is in the child lock unlocking position, the inner unlocking lever contacts the rotatable lock block and drives the inner unlocking block to rotate. The inner unlocking head pushes the rotating transmission block to unlock from the inside. When the lever seat rotates to the child lock locking position, the rotatable lock block is contacted and rotated by the lever seat. The inner unlocking lever does not contact the rotatable lock block and cannot drive the inner unlocking block to rotate for inner unlocking.
[0005] A further feature is that a lever is provided on the lever seat, and an arc-shaped groove that cooperates with the lever is provided on the door lock housing;
[0006] A torsion spring seat is fixed on the inner unlocking shaft, and a torsion spring is fitted on the torsion spring seat. One end of the torsion spring abuts against the torsion spring seat, and the other end abuts against the inner unlocking block and the inner unlocking lever.
[0007] The inner unlocking lever has a U-shaped structure in the middle to allow space after the inner unlocking block rotates.
[0008] By adopting this utility model, a rotatable lock block is installed on the inner unlocking block. The lever is used to drive the rotatable lock block to rotate for unlocking and locking, thus realizing the function of a child lock. The overall structure is simple and the cost of use is low. Attached Figure Description
[0009] Figure 1 This is a first-view schematic diagram of the structure of this utility model;
[0010] Figure 2 This is a second-view schematic diagram of the structure of this utility model;
[0011] Figure 3 A schematic diagram of the back of the inner unlocking block, inner unlocking lever, and lever seat;
[0012] Figure 4 This is a schematic diagram of the back of the door lock housing. Detailed Implementation
[0013] See Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a child lock device for the rear door of a car includes an unlocking mechanism. The unlocking mechanism includes a rotary transmission block 2 that cooperates with the door lock unlocking block 1, an inner unlocking block 3, an inner unlocking lever 4, and a lever seat 5. The inner unlocking block 3 and the inner unlocking lever 4 are both rotatably mounted on an inner unlocking shaft 6. The inner unlocking shaft 6 is set on the door lock housing 10. One end of the inner unlocking block 3 is provided with an inner unlocking head 7. The rotary transmission block 2 is provided with an inner unlocking transmission head 8 that cooperates with the inner unlocking head 7. The other end of the inner unlocking block 3 is provided with a rotatable lock block 9. The lever seat 5 is rotatably connected to the door lock housing 10. The rotation of the lever seat 5 can push the rotatable lock block 9 to rotate.
[0014] A lever 11 is provided on the lever base 5, and an arc-shaped groove 12 that cooperates with the lever 11 is provided on the door lock housing 10. The lever 11 can drive the lever base 5 to rotate. When the lever is at the lower part of the arc-shaped groove 12, it is in the unlocked state, and when it is moved to the upper part of the arc-shaped groove 12, it is in the locked state.
[0015] A torsion spring seat 13 is fixed on the inner unlocking shaft 6, and a torsion spring 14 is fitted on the torsion spring seat 13. One end of the torsion spring 14 abuts against the torsion spring seat 13, and the other end abuts against the inner unlocking block 3 and the inner unlocking lever 4, which can realize the reset after the inner unlocking block 3 and the inner unlocking lever 4 are rotated. The figure shows the torsion spring corresponding to the rotatable locking block 9. The rotatable locking block 9 can also be reset after rotation.
[0016] The middle of the inner unlock lever 4 has a U-shaped structure to make way for the inner unlock block 3 after it rotates.
[0017] Figures 1 to 3The demonstration shows the lever seat in the child lock unlock position, with the lower part of the rotatable lock block 9 pressed against the inner unlock block 3. When performing an inside door opening operation, the inner unlock lever 4 moves (rotates upwards) and contacts the rotatable lock block 9, causing the inner unlock block 3 to rotate. The inner unlock head 7 pushes the rotating transmission block 2 to rotate, thus allowing the door lock unlock block 1 to rotate and unlock the inside of the door. When the lever 11 of the lever seat 5 is moved upwards, causing the lever seat 5 to rotate to the child lock locked position, the rotatable lock block 9 is contacted by the lever seat and pushed outwards, so that its lower part no longer contacts the inner unlock block 3. When the inner unlock lever moves, due to the presence of the U-shaped structure in the middle, it does not contact the rotatable lock block 9, nor does it contact the inner unlock block 3, essentially spinning freely. Therefore, it cannot drive the inner unlock block 3 to rotate and unlock from the inside, thus realizing the child lock function.
Claims
1. A child lock device for a rear door of an automobile, comprising an unlocking mechanism including a rotary driving block cooperating with a door lock unlocking block, characterized in that, Also include the inner unlocking block, inner unlocking lever, lever seat, the inner unlocking block and the inner unlocking lever are both rotatingly installed on the inner unlocking shaft, one end of the inner unlocking block is provided with an inner unlocking head, the rotating transmission block is provided with an inner unlocking transmission head matched with the inner unlocking head, the other end of the inner unlocking block is provided with a rotatable lock block, the lever seat is rotatably connected with the door lock shell; When the lever seat is in the child lock unlocking position, the inner unlocking lever contacts the rotatable lock block when acting and drives the inner unlocking block to rotate, the inner unlocking head pushes the rotating transmission block to unlock the inner side; when the lever seat is rotated to the child lock locking position, the rotatable lock block is contacted and rotated by the lever seat, the inner unlocking lever does not contact the rotatable lock block when acting, and cannot drive the inner unlocking block to rotate to unlock the inner side.
2. The child lock device for a rear door of an automobile according to claim 1, wherein The lever seat is provided with a lever, and the door lock shell is provided with an arc-shaped groove matched with the lever.
3. The child lock device for a rear door of an automobile according to claim 1, wherein The inner unlocking shaft is fixed with a torsional spring seat, the torsional spring seat is sleeved with a torsional spring, one end of the torsional spring abuts against the torsional spring seat, and the other end abuts against the inner unlocking block and the inner unlocking lever.
4. The child lock device for a rear door of an automobile according to claim 1, wherein The middle of the inner unlocking lever is a U-shaped structure as a space for the inner unlocking block after rotating.