Two-gear lock for automobile backrest

Abstract

According to the technical scheme, the automobile backrest two-gear lock is characterized in that the automobile backrest two-gear lock comprises a lock body frame, a locking assembly, a blocking assembly and a lock body assembly, the locking assembly, the blocking assembly and the lock body assembly are all rotatably installed on the lock body frame, and the locking assembly is used for limiting unlocking of the lock body assembly by abutting against the blocking assembly; the lock body assembly is installed on the first rotating shaft, the locking assembly and the blocking assembly are both installed on the second rotating shaft, and limiting bodies of the locking assembly and the blocking assembly are both limited to be the locking assembly, so that the actual occupied size can be reduced, and the locking assembly is convenient to use. The overall design of the vehicle body is facilitated.

Description

A two-position lock for car backrests Technical Field

[0001] This utility model relates to a lock, and more specifically, to a two-position lock for a car backrest. Background Technology

[0002] A two-position car seat backrest lock is a seat adjustment device typically used for vehicle seat safety. It allows the backrest lock to switch between and lock in two fixed locking modes. The two-position car seat backrest lock uses a mechanical structure to fix the position, ensuring the backrest is stable and does not wobble. It generally provides two commonly used positions: a quick-locking first position and a safe second position. However, in actual use, it has been found that existing two-position car seat backrest locks usually use independently set stop mechanisms for control. This results in the two-position car seat backrest lock occupying a large space, which is inconvenient for the overall design of the vehicle body. With the increasing demand for lightweight and space-efficient vehicles, customers have put forward higher requirements for the size, compatibility, and installation flexibility of car seat backrest locks. Therefore, there is a need for a two-position car seat backrest lock with a smaller overall size, which is convenient for the overall design of the vehicle body.

[0003] For the reasons mentioned above, how to reduce the size of the device is the problem that this application addresses. Summary of the Invention

[0004] To address the shortcomings of existing technologies, a two-position lock for car backrests is provided. This device has a smaller overall size, which facilitates the overall design of the vehicle body.

[0005] To achieve the above objectives, the following technical solution is provided: a two-position lock for a car backrest, comprising a lock body frame, a locking component, a blocking component, and a lock body assembly. The locking component, the blocking component, and the lock body assembly are all rotatably mounted on the lock body frame. The locking component is used to restrict the unlocking of the lock body assembly by abutting the blocking component, and the blocking component is used to restrict the rotation of the lock body assembly by abutting the blocking component.

[0006] In the first locked position, both the locking component and the blocking component are in contact with the lock body component, and the locking component and the blocking component form a clamping structure.

[0007] In the second locked position, the locking component is in contact with the lock body component, and the blocking component is separated from the lock body component.

[0008] Furthermore, the lock body frame is fixedly connected to a first rotating shaft and a second rotating shaft, the lock body assembly is installed on the first rotating shaft, and the locking assembly and the blocking assembly are both installed on the second rotating shaft.

[0009] In summary, the above technical solution has the following beneficial effects: During the first locking process, the lock body assembly is directly controlled by the bolt. The bolt drives the lock body assembly to rotate. When the lock body assembly rotates to the point of contact with the blocking assembly, it stops rotating. At this time, the locking assembly also contacts the lock body assembly and prevents the lock body assembly from rotating in the opposite direction to unlock. Therefore, the locking assembly and the blocking assembly form a clamping structure and are embedded in the structural contour of the lock body assembly, thereby preventing the lock body assembly from rotating.

[0010] During the second-position locking process, the blocking component needs to be separated from the lock body component first. This allows the bolt to continue driving the lock body component to rotate, causing the locking component to abut against another part of the lock body component. This also allows the locking component to achieve the locking effect. Compared to the first-position locking, the second-position locking has a larger rotation angle for the lock body component, making the contact point between the locking component and the lock body component closer to the rotation center of the lock body component. Therefore, the force required to unlock is also greater. At the same time, if the blocking component is not removed again, the blocking component will also prevent the lock body component from unlocking.

[0011] In traditional backrest locks, the lock body assembly is activated to the locking function only through the locking component. The second-position locking also requires an additional blocking component, which results in a large volume. This utility model installs the lock body assembly on the first pivot, and both the locking component and the blocking component are installed on the second pivot. Furthermore, the limiting body of both the locking component and the blocking component is limited to the locking component. This reduces the actual volume occupied and facilitates the overall design of the vehicle body. Attached Figure Description

[0012] Figure 1 is a front three-dimensional structural diagram of a two-position lock on a car backrest;

[0013] Figure 2 is a three-dimensional structural diagram of the back of this utility model;

[0014] Figure 3 is a three-dimensional structural diagram of the locking component in this utility model;

[0015] Figure 4 is a three-dimensional structural diagram of the stop component of this utility model.

[0016] Reference numerals: 1. Lock body frame; 2. Locking assembly; 3. Blocking assembly; 4. Lock body assembly; 5. Stopping assembly;

[0017] 11. First rotating shaft; 12. Second rotating shaft;

[0018] 21. Locking plate; 22. Locking torsion spring;

[0019] 31. Blocking hook; 32. Blocking spring; 33. Opening rod; 34. Groove;

[0020] 41. Locking leaf; 42. Stop block; 43. Locking leaf torsion spring; 44. Stop block torsion spring;

[0021] 51. Stop hook; 52. Stop torsion spring; 53. First abutment; 54. Second abutment. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0023] Referring to Figures 1-4, a two-position lock for a car backrest includes a lock body frame 1, a locking component 2, a blocking component 3, and a lock body component 4. The locking component 2, the blocking component 3, and the lock body component 4 are all rotatably mounted on the lock body frame 1. The locking component 2 is used to restrict the lock body component 4 from unlocking by abutting the blocking component 3, and the blocking component 3 is used to restrict the lock body component 4 from rotating by abutting the blocking component 3.

[0024] In the first locked position, both the locking component 2 and the blocking component 3 are in contact with the lock body component 4, and the locking component 2 and the blocking component 3 form a clamping structure.

[0025] In the second locked position, the locking component 2 abuts against the lock body component 4, and the blocking component 3 separates from the lock body component 4.

[0026] Furthermore, the lock body frame 1 is fixedly connected to a first rotating shaft 11 and a second rotating shaft 12, the lock body assembly 4 is installed on the first rotating shaft 11, and the locking assembly 2 and the blocking assembly 3 are both installed on the second rotating shaft 12.

[0027] During the first locking process, the lock body assembly 4 is directly controlled by the bolt. The bolt drives the lock body assembly 4 to rotate. The lock body assembly 4 stops rotating when it comes into contact with the blocking assembly 3. At this time, the locking assembly 2 also comes into contact with the lock body assembly 4 and prevents the lock body assembly 4 from rotating in the opposite direction to unlock. Therefore, the locking assembly 2 and the blocking assembly 3 form a clamping structure and are embedded in the structural contour of the lock body assembly 4, thereby preventing the lock body assembly 4 from rotating.

[0028] During the second-position locking process, the blocking component 3 needs to be separated from the lock body component 4 first. This allows the bolt to continue driving the lock body component 4 to rotate, causing the locking component 2 to abut against another part of the lock body component 4. This also allows the locking component 2 to achieve the locking effect. Compared to the first-position locking, the second-position locking has a larger rotation angle for the lock body component 4, making the contact point between the locking component 2 and the lock body component 4 closer to the rotation center of the lock body component 4. Therefore, the force required to unlock is greater. At the same time, if the blocking component 3 is not removed again, the blocking component 3 will also prevent the lock body component 4 from unlocking.

[0029] In traditional backrest locks, the lock body assembly 4 is only activated to the locking function by the locking assembly 2. The second-position locking also requires an additional blocking assembly 3, which results in a large volume. This utility model installs the lock body assembly 4 on the first rotating shaft 11, and both the locking assembly 2 and the blocking assembly 3 are installed on the second rotating shaft 12. Furthermore, the main limiting body of both the locking assembly 2 and the blocking assembly 3 is limited to the locking assembly 2. This reduces the actual volume occupied and facilitates the overall design of the vehicle body.

[0030] Furthermore, the lock body assembly 4 includes a lock leaf 41 and a stop 42. The lock leaf 41 abuts against the locking assembly 2, and the stop 42 is connected to the blocking assembly 3. Both the lock leaf 41 and the stop 42 are used to abut against the bolt.

[0031] Furthermore, the lock body assembly 4 also includes a lock leaf torsion spring 43. The two ends of the lock leaf torsion spring 43 are fixedly connected to the lock leaf 41 and the lock body frame 1, respectively. The lock leaf torsion spring 43 is sleeved on the first rotating shaft 11, and the lock leaf 41 is rotatably connected to the first rotating shaft 11.

[0032] Furthermore, the lock body assembly 4 also includes a stop torsion spring 44, the two ends of which are fixedly connected to the stop block 42 and the lock body frame 1 respectively. The stop torsion spring 44 is sleeved on the first rotating shaft 11, and the stop block 42 is rotatably connected to the first rotating shaft 11.

[0033] Furthermore, the locking assembly 2 is connected to a stop assembly 5, which is used to restrict the rotation of the lock body assembly 4.

[0034] Furthermore, the locking assembly 2 includes a locking plate 21 and a locking torsion spring 22. The two ends of the locking torsion spring 22 are fixedly connected to the lock body frame 1 and the locking plate 21, respectively. The locking torsion spring 22 is used to drive the locking plate 21 to abut against the lock leaf 41 and to restrict the lock leaf 41 from unlocking. The locking torsion spring 22 is sleeved on the second rotating shaft 12, and the locking plate 21 is rotatably connected to the second rotating shaft 12.

[0035] Furthermore, the blocking assembly 3 includes a blocking hook 31 and a blocking spring 32. The two ends of the blocking spring 32 are fixedly connected to the locking blocking hook 31 and the locking piece 21, respectively. The blocking spring 32 is used to drive the blocking hook 31 to abut against the stop block 42.

[0036] Furthermore, the stop assembly 5 includes a stop hook 51 and a stop torsion spring 52. The two ends of the stop torsion spring 52 are fixedly connected to the lock body frame 1 and the stop hook 51, respectively. The stop hook 51 is used to cooperate with the lock leaf 41 to achieve the unlocking function. The stop torsion spring 52 is sleeved on the second rotating shaft 12, and the stop hook 51 is rotatably connected to the second rotating shaft 12.

[0037] Furthermore, the stop assembly 5 also includes an opening rod 33, which is rotatably connected to the stop hook 51. The opening rod 33 is used to drive the stop hook 51 to rotate.

[0038] Furthermore, the blocking hook 31 is also provided with a groove 34, and the stop hook 51 is provided with a first abutting member 53 and a second abutting member 54. The first abutting member 53 is used to abut the locking piece 21, and the second abutting member 54 is used to abut the inner wall of the groove 34.

[0039] The core structure consists of the stop hook 51, the lock leaf 41, the stop block 42, and the blocking hook 31. With the engagement of the stop torsion spring 52 and the lock leaf torsion spring 43, the locking and unlocking functions can be realized. The lock body frame 1, the first rotating shaft 11, and the second rotating shaft 12 are fixed to form the main frame of the lock body. The two rotating shafts mainly serve as the rotation centers of the stop block 42, the stop hook 51, the locking plate 21, and the lock leaf 41. During installation, calculations need to be performed on the stop block 42, the locking plate 21, the stop hook 51, and the lock leaf 41 respectively, so as to design matching stop torsion spring 44, stop torsion spring 52, lock leaf torsion spring 43, and locking torsion spring 22 to provide the necessary torque. Since the blocking hook 31 does not require excessive driving force and considering that manual control is also required, the blocking spring 32 is not a torsion spring.

[0040] In addition, since the second-position unlocking relies primarily on the rotation of the blocking hook 31 to control further locking, a first contact point is provided to abut against the locking plate 21 and a second contact point 54 to abut against the inner wall of the groove 34. The rotation of the blocking hook 31 simultaneously controls the rotation of the stop hook 51 and the locking plate 21.

[0041] The principle of this project is that the opening rod 33 drives the stop hook 51 to rotate. While the stop hook 51 rotates, it controls the locking plate 21 and the blocking hook 31. The opening rod 33 is unlocked under the action of the torsion spring during its movement. When the backrest lock is in the open position, the bolt contacts the lock leaf 41 and the stop block 42 during the locking process, causing the lock leaf 41 and the stop block 42 to rotate around the first rotating shaft 11. When the stop block 42 contacts the blocking hook 31, it reaches the first locking position. The locking plate 21 and the stop hook 51 enter the contour of the lock leaf 41 to achieve the first locking position.

[0042] When entering the second gear, the opening lever 33 needs to be pulled in the unlocking direction. The stop hook 51, locking plate 21, and blocking hook 31 will disengage from the movement trajectory of the lock leaf 41. Then, the lock leaf 41 will move towards the second gear position under the action of the bolt. The stop hook 51 and locking plate 21 will re-enter the outline of the lock leaf 41 to achieve the second gear locking.

[0043] In traditional backrest locks, to achieve two-position locking, the locking plate 21, the stop hook 51, and the lock leaf 41 form one group, while the blocking hook 31 and the stop block 42 form another group. The two groups are set separately. In the case of separate setting, more installation space is required, and the stop component 5 and the locking component 2 are set on the same horizontal plane. However, in actual use, since the locking component 2 is the part that restricts the lock body component 4 from unlocking or locking, and the stop component 5 is used as a connecting medium, space can be saved by setting the stop component 5 and the locking component 2 to rotate coaxially. In this way, the actual volume can be further reduced, thereby facilitating the overall design of the vehicle body.

[0044] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A two-position lock for a car backrest, characterized in that, The lock includes a lock body frame, a locking assembly, a blocking assembly, and a lock body assembly. The locking assembly, blocking assembly, and lock body assembly are all rotatably mounted on the lock body frame. The locking assembly is used to restrict the unlocking of the lock body assembly by abutting against the blocking assembly, and the blocking assembly is used to restrict the rotation of the lock body assembly by abutting against the blocking assembly. In the first locked position, both the locking assembly and the blocking assembly abut against the lock body assembly, and the locking assembly and the blocking assembly form a clamping structure. In the second locked position, the locking assembly abuts against the lock body assembly, and the blocking assembly separates from the lock body assembly.

2. The two-position lock for a car backrest according to claim 1, characterized in that, The lock body frame is fixedly connected to a first rotating shaft and a second rotating shaft. The lock body assembly is installed on the first rotating shaft, and the locking assembly and the blocking assembly are both installed on the second rotating shaft.

3. A two-position lock for a car backrest according to claim 2, characterized in that, The lock body assembly includes a lock leaf and a stop block. The lock leaf abuts against the locking assembly, and the stop block is connected to the blocking assembly. Both the lock leaf and the stop block are used to abut against the bolt.

4. A two-position lock for a car backrest according to claim 3, characterized in that, The lock body assembly also includes a lock leaf torsion spring, the two ends of which are fixedly connected to the lock leaf and the lock body frame, respectively. The lock leaf torsion spring is sleeved on the first rotating shaft, and the lock leaf is rotatably connected to the first rotating shaft. The lock body assembly also includes a stop torsion spring, the two ends of which are fixedly connected to the stop block and the lock body frame, respectively. The stop torsion spring is sleeved on the first rotating shaft, and the stop block is rotatably connected to the first rotating shaft.

5. A two-position lock for a car backrest according to any one of claims 3-4, characterized in that, The locking assembly is connected to a stop assembly, which is used to restrict the rotation of the lock body assembly.

6. A two-position lock for a car backrest according to claim 5, characterized in that, The locking assembly includes a locking plate and a locking torsion spring. The two ends of the locking torsion spring are fixedly connected to the lock body frame and the locking plate, respectively. The locking torsion spring is used to drive the locking plate to abut against the lock leaf and to restrict the lock leaf from unlocking. The locking torsion spring is sleeved on the second rotating shaft, and the locking plate is rotatably connected to the second rotating shaft.

7. A two-position lock for a car backrest according to claim 6, characterized in that, The blocking assembly includes a blocking hook and a blocking spring. The two ends of the blocking spring are fixedly connected to the locking blocking hook and the locking plate, respectively. The blocking spring is used to drive the blocking hook to abut against the blocking block.

8. A two-position lock for a car backrest according to claim 7, characterized in that, The stopping assembly includes a stopping hook and a stopping torsion spring. The two ends of the stopping torsion spring are fixedly connected to the lock body frame and the stopping hook, respectively. The stopping hook is used to cooperate with the lock leaf to achieve the unlocking function. The stopping torsion spring is sleeved on the second rotating shaft, and the stopping hook is rotatably connected to the second rotating shaft.

9. A two-position lock for a car backrest according to claim 8, characterized in that, The blocking hook is also provided with a groove, and the stop hook is provided with a first abutment and a second abutment. The first abutment is used to abut the locking piece, and the second abutment is used to abut the inner wall of the groove.

10. A two-position lock for a car backrest according to claim 8, characterized in that, The stop assembly also includes an opening rod, which is rotatably connected to the stop hook and is used to drive the stop hook to rotate.

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