Electric unlocking seat backrest lock

Abstract

According to the technical scheme, the electric unlocking seat backrest lock is characterized in that the electric unlocking seat backrest lock comprises a frame, a first microswitch, a second microswitch, a transmission assembly, a control assembly, a stop assembly and a lock body assembly, and the first microswitch, the second microswitch, the transmission assembly, the control assembly, the stop assembly and the lock body assembly are all installed in the frame; the transmission assembly is used for driving the control assembly to move, the control assembly is arranged to control the first microswitch and the second microswitch in an abutting mode, and the first microswitch and the second microswitch can reversely control the control assembly to stop after being abutted, so that excessive movement of a component used for abutting is avoided, and the safety of the device is improved. And abnormal sound caused by a gap after the lock bolt is locked is prevented.

Description

Technical Field

[0001] The utility model relates to a lock, and more particularly to an electric unlocking seat back lock. Background Art

[0002] As passenger cars become more and more intelligent, especially the demand for intelligent new energy vehicles is obvious, major OEMs have successively increased their investment in the research and development of intelligent vehicle models. Compared with traditional unlocking methods and unlocking positions, electric unlocking is more comfortable, the unlocking position arrangement is more flexible and changeable, and the unlocking method is easier to realize intelligence under the control of the ECU of the whole vehicle, and it can also greatly improve comfort. However, in the prior art, the moving distance of the transmission nut is directly controlled by the motor, which will cause excessive movement, resulting in the locking hook easily interfering with the transmission nut when unlocking and locking. Therefore, an electric unlocking seat back lock is needed, which can prevent the locking hook from interfering with the transmission nut when unlocking and locking are completed.

[0003] In view of the above reasons, how to prevent the locking hook from interfering with the transmission nut when completing unlocking and locking is exactly the problem considered in this application. Utility Model Content

[0004] In view of the shortcomings of the prior art, an electric unlocking seat back lock is provided, wherein a stop hook does not interfere with a driving nut when completing unlocking and locking.

[0005] To achieve the above purpose, the following technical solutions are provided: an electrically unlocked seat back lock, comprising a frame, a first micro switch, a second micro switch, a transmission assembly, a control assembly, a stop assembly and a lock body assembly, wherein the first micro switch, the second micro switch, the transmission assembly, the control assembly, the stop assembly and the lock body assembly are all installed inside the frame, and the transmission assembly is used to drive the control assembly to move;

[0006] When the control component triggers the first micro switch, the first micro switch controls the transmission component to stop, the control component limits the rotation of the stop component, and the lock body component is unlocked;

[0007] When the control assembly triggers the second micro switch, the second micro switch controls the transmission assembly to stop, and the stop assembly limits the rotation of the lock body assembly.

[0008] In summary, the above technical solution has the following beneficial effects: the control component is usually indirectly used to control the lock body component to realize the unlocking or locking function. In order to prevent the lock body component from being out of position, the common control component will choose to move the conflicting component excessively for a short distance when rotating, so this short distance will form a gap, and the conflicting component can actually move freely in this gap, so it will cause the stop hook and the transmission nut to interfere. In the utility model, the first micro switch and the second micro switch can directly control the transmission component to stop when and only when the conflicting component moves to the predetermined position, so there is no need for the conflicting component to move excessively for a short distance, so that the stop hook will not interfere with the transmission nut when unlocking and locking are completed;

[0009] The utility model arranges a control component to control the first micro switch and the second micro switch through interference, and the first micro switch and the second micro switch can reversely control the control component to stop after being interfered, thereby avoiding excessive movement of the components used for interference and preventing the occurrence of gaps and abnormal noises after the lock bolt is locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of an electric unlocking seat back lock;

[0011] Figure 2 It is a three-dimensional structural schematic diagram of the utility model when the transmission nut abuts against the first micro switch;

[0012] Figure 3 It is a three-dimensional structural schematic diagram of the utility model when the transmission nut abuts against the second micro switch;

[0013] Figure 4 It is a schematic diagram of the three-dimensional structure when the locking blade in the utility model rotates to another state;

[0014] Figure 5 It is a three-dimensional structural schematic diagram of the utility model when the stop hook rotates to another state.

[0015] Reference numerals: 1, frame; 2, first micro switch; 3, second micro switch; 4, control assembly; 5, stop assembly; 6, lock assembly;

[0016] 11. Lock housing; 12. Cover plate;

[0017] 41. Transmission assembly; 42. Threaded rod; 43. Transmission nut; 44. Motor; 45. First worm; 46. First turbine; 47. Second worm; 48. Second turbine;

[0018] 51. first rotating shaft; 52. locking plate; 53. stop hook; 54. first torsion spring; 55. third torsion spring;

[0019] 61. Second rotating shaft; 62. Lock leaf; 63. Second torsion spring. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0021] Reference Figure 1-5 As shown, an electric unlocking seat back lock includes a frame 1, a first micro switch 2, a second micro switch 3, a transmission assembly 41, a control assembly 4, a stop assembly 5 and a lock body assembly 6. The first micro switch 2, the second micro switch 3, the transmission assembly 41, the control assembly 4, the stop assembly 5 and the lock body assembly 6 are all installed inside the frame 1, and the transmission assembly 41 is used to drive the control assembly 4 to move;

[0022] When the control component 4 triggers the first micro switch 2, the first micro switch 2 controls the transmission component 41 to stop, the control component 4 limits the rotation of the stop component 5, and the lock body component 6 is unlocked;

[0023] When the control assembly 4 triggers the second micro switch 3 , the second micro switch 3 controls the transmission assembly 41 to stop, and the stop assembly 5 limits the rotation of the lock body assembly 6 .

[0024] The control component 4 is usually indirectly used to control the lock body component 6 to realize the unlocking or locking function. In order to prevent the lock body component 6 from being out of position, the common control component 4 will choose to move the part used for interference excessively for a short distance when rotating. Therefore, this short distance will form a gap. The conflicting part can actually move freely in this gap, so it will cause the stop hook 53 and the transmission nut 43 to interfere. In the utility model, when and only when the part used for interference moves to the predetermined position, the first micro switch 2 and the second micro switch 3 can directly control the transmission component 41 to stop, so there is no need for the conflicting part to move excessively for a short distance, so that the stop hook 53 will not interfere with the transmission nut 43 when unlocking and locking are completed;

[0025] The utility model arranges a control component 4 to control the first micro switch 2 and the second micro switch 3 through interference, and the first micro switch 2 and the second micro switch 3 can also reversely control the control component 4 to stop after being interfered, thereby avoiding excessive movement of the components used for interference and preventing the occurrence of gaps and abnormal noises after the bolt is locked.

[0026] Furthermore, the control component 4 includes a threaded rod 42 and a transmission nut 43. The transmission component 41 is fixedly connected to the threaded rod 42. The threaded rod 42 is threadedly connected to the transmission nut 43. The transmission component 41 drives the threaded rod 42 to rotate to drive the transmission nut 43 to move along the threaded rod 42.

[0027] Furthermore, the transmission assembly 41 includes a motor 44, a first worm 45, a first turbine 46, a second worm 47 and a second turbine 48. The first worm 45 is connected to the motor 44, the first turbine 46 is connected to the first worm 45, the first turbine 46 and the second worm 47 are fixedly connected, the second worm 47 and the second turbine 48 are connected, and the second turbine 48 is coaxially and fixedly connected to the threaded rod 42. The motor 44 drives the first worm 45, the first turbine 46, the second worm 47 and the second turbine 48 to rotate in sequence.

[0028] Furthermore, the second worm gear 47 is arranged to be inclined.

[0029] The motor 44 can increase the torque by cooperating with two worms and two turbines, and an additional worm gear structure can be added when necessary. In addition, the inclination of the second worm 47 can increase the stability of the transmission process, and the stability of the second worm 47 itself can be maintained by the shape of the frame 1 without affecting the transmission.

[0030] The first micro switch 2 and the second micro switch 3 are both axially distributed along the threaded rod 42;

[0031] When the transmission assembly 41 rotates forward, the transmission nut 43 disengages from the first micro switch 2 and moves toward the second micro switch 3. After the transmission nut 43 contacts the second micro switch 3, the transmission assembly 41 stops rotating.

[0032] When the transmission assembly 41 rotates in the reverse direction, the transmission nut 43 disengages from the second micro switch 3 and moves toward the first micro switch 2 . After the transmission nut 43 contacts the first micro switch 2 , the transmission assembly 41 stops rotating, and the transmission nut 43 limits the rotation of the stop assembly 5 .

[0033] The threaded rod 42 is driven to rotate by the transmission assembly 41. The threaded rod 42 is restricted in the frame 1 and cannot move but can only rotate, while the transmission nut 43 cannot rotate in the frame 1 but can only move. Therefore, the threaded rod 42 can drive the transmission nut 43 to move by rotating. When the transmission nut 43 moves, it can contact the first microswitch 2, the second microswitch 3 and the transmission nut 43. The motor 44 provides a back and forth movement force to the transmission nut 43. The first microswitch 2 and the second microswitch 3 can control the distance of the repeated movement of the transmission nut 43, and only after the transmission nut 43 contacts the second microswitch 3, the transmission nut 43 will limit the movement of the lock body assembly 6.

[0034] Furthermore, the stop assembly 5 includes a first rotating shaft 51, a stop hook 53 and a first torsion spring 54. The stop hook 53 is rotatably connected to the first rotating shaft 51. Both ends of the first torsion spring 54 are respectively abutted against the first rotating shaft 51 and the stop hook 53. The stop hook 53 is used to abut against the transmission nut 43.

[0035] The stop assembly 5 further includes a locking piece 52 and a third torsion spring 55 . The locking piece 52 is rotatably connected to the first rotating shaft 51 . The third torsion spring 55 abuts against the locking piece 52 . Two ends of the third torsion spring 55 abut against the first rotating shaft 51 and the locking piece 52 , respectively.

[0036] The lock body assembly 6 includes a second rotating shaft 61 , a locking leaf 62 and a second torsion spring 63 . The second rotating shaft 61 is rotatably connected to the locking leaf 62 . Two ends of the second torsion spring 63 abut against the second rotating shaft 61 and the locking leaf 62 respectively. The locking leaf 62 abuts against the locking plate 52 .

[0037] The first rotating shaft 51 and the second rotating shaft 61 are both fixedly connected in the frame 1, the locking piece 52, the stop hook 53 and the first torsion spring 54 rotate around the first rotating shaft 51 as the rotation center, and the locking leaf 62 and the second torsion spring 63 rotate around the second rotating shaft 61 as the rotation center;

[0038] When the transmission nut 43 is in the initial state, the transmission nut 43 contacts the first micro switch 2. At this time, the third torsion spring 55, the second torsion spring 63 and the first torsion spring 54 are all in a torsion state. The stop hook 53 cannot move because it contacts the transmission nut 43 and the frame 1. Therefore, the third torsion spring 55, the second torsion spring 63 and the first torsion spring 54 cannot drive the locking piece 52 and the locking leaf 62 to rotate.

[0039] When the transmission nut 43 contacts the second micro switch 3, the stop hook 53 can move freely. Under the joint action of the third torsion spring 55, the second torsion spring 63 and the first torsion spring 54, the locking piece 52 drives the lock leaf 62 to rotate, thereby achieving unlocking or locking. When unlocking or locking is completed, the stop hook 53 will not interfere with the transmission nut 43.

[0040] When the transmission nut 43 disengages from the second micro switch 3, the transmission nut 43 abuts against the stop hook 53 and drives the stop hook 53 to return to the original position. At this time, the stop hook 53, the locking plate 52 and the locking leaf 62 are returned to the original position in sequence. When the transmission nut 43 abuts against the first micro switch 2 again, since the transmission nut 43 always abuts against the stop hook 53, the stop hook 53, the locking plate 52 and the locking leaf 62 after returning to the original position cannot rotate under the action of the third torsion spring 55, the second torsion spring 63 and the first torsion spring 54, thereby failing to achieve unlocking or locking.

[0041] Furthermore, the frame 1 includes a lock housing 11 and a cover plate 12 .

[0042] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An electrically unlocked seat back lock, characterized in that: It includes a frame, a first micro switch, a second micro switch, a transmission assembly, a control assembly, a stop assembly and a lock assembly, wherein the first micro switch, the second micro switch, the transmission assembly, the control assembly, the stop assembly and the lock assembly are all installed inside the frame, and the transmission assembly is used to drive the control assembly to move; When the control component triggers the first micro switch, the first micro switch controls the transmission component to stop, the control component limits the rotation of the stop component, and the lock body component is unlocked; When the control assembly triggers the second micro switch, the second micro switch controls the transmission assembly to stop, and the stop assembly limits the rotation of the lock body assembly.

2. The electric unlocking seat back lock according to claim 1, characterized in that: The frame comprises a lock shell and a cover plate.

3. An electrically unlockable seat back lock according to any one of claims 1-2, characterized in that: The control assembly includes a threaded rod and a transmission nut. The transmission assembly is connected to the threaded rod. The threaded rod is threadedly connected to the transmission nut. The transmission assembly drives the threaded rod to rotate to drive the transmission nut to move along the threaded rod.

4. The electric unlocking seat back lock according to claim 3, characterized in that: The transmission assembly includes a motor, a first worm, a first turbine, a second worm and a second turbine. The first worm is connected to the motor, the first turbine is connected to the first worm, the first turbine and the second worm are coaxially fixedly connected, the second worm is connected to the second turbine, and the second turbine is coaxially fixedly connected to the threaded rod. The motor drives the first worm, the first turbine, the second worm and the second turbine to rotate in sequence.

5. The electric unlocking seat back lock according to claim 4, characterized in that: The second worm is arranged tilted.

6. The electric unlocking seat back lock according to claim 3, characterized in that: The first micro switch and the second micro switch are both distributed along the axial direction of the threaded rod; When the transmission assembly rotates forward, the transmission nut disengages from the first micro switch and moves toward the second micro switch. After the transmission nut contacts the second micro switch, the transmission assembly stops rotating. When the transmission assembly rotates in the reverse direction, the transmission nut disengages from the second micro switch and moves toward the first micro switch. After the transmission nut hits the first micro switch, the transmission assembly stops rotating, and the transmission nut limits the rotation of the locking assembly.

7. The electrically unlockable seat back lock according to claim 6, characterized in that: The stop assembly includes a first rotating shaft, a stop hook and a first torsion spring. The stop hook is rotatably connected to the first rotating shaft. Two ends of the first torsion spring are respectively in contact with the first rotating shaft and the stop hook. The stop hook is used to contact the transmission nut.

8. The electrically unlockable seat back lock according to claim 7, characterized in that: The stop assembly also includes a locking plate and a third torsion spring. The locking plate is rotatably connected to the first rotating shaft, the third torsion spring abuts against the locking plate, and two ends of the third torsion spring abut against the first rotating shaft and the locking plate respectively.

9. The electric unlocking seat back lock according to claim 7, characterized in that: The lock body assembly includes a second rotating shaft, a locking leaf and a second torsion spring, the second rotating shaft is rotatably connected to the locking leaf, two ends of the second torsion spring are respectively abutted against the second rotating shaft and the locking leaf, and the locking leaf is abutted against the locking plate.

10. The electric unlocking seat back lock according to claim 8, characterized in that: The lock body assembly includes a second rotating shaft, a locking leaf and a second torsion spring, the second rotating shaft is rotatably connected to the locking leaf, two ends of the second torsion spring are respectively abutted against the second rotating shaft and the locking leaf, and the locking leaf is abutted against the locking plate.

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