Electric latch actuator

Abstract

The utility model discloses an electric latch actuator, which comprises a base, a switching mechanism and an actuating mechanism, and a cushion is fixed on the base; the switching mechanism comprises a worm gear, a gear, a worm and a motor, the executing mechanism comprises a rack and a lock rod, the rack is arranged on the base in a sliding mode and meshed with the gear, a limiting groove allowing the cushion to be placed in is formed in the rack, and the lock rod is fixed to the other end of the rack. The electric latch actuator has the advantages that when the lock rod completely stretches out, the buffer cushion abuts against one end of the limiting groove so as to limit further stretching out of the lock rod, and when the lock rod completely retracts, the buffer cushion abuts against the other end of the limiting groove so as to limit further retraction of the lock rod. Therefore, collision impact between the lock rod and the external lock body is reduced, and noise generated when the electric latch actuator is locked or unlocked can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive glove box locks, and particularly relates to an electric latch actuator. Background Art

[0002] An electric latch actuator is a device driven by electricity and is used to control the opening and closing of a latch. The electric latch actuator converts rotational motion into linear motion through a series of transmission mechanisms by the power generated by an electric motor, thereby achieving the control of the latch. It can quickly and accurately complete the opening and closing actions of the latch and is widely used in fields such as automobiles, furniture, and medical equipment.

[0003] When the existing electric latch actuator locks or unlocks, it will emit a relatively large noise, which affects the user experience. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above technical deficiencies and propose an electric latch actuator to solve the technical problem that when the existing electric latch actuator locks or unlocks, it will emit a relatively large noise, which affects the user experience.

[0005] To achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an electric latch actuator, including:

[0007] A base, on which a buffer pad is fixed;

[0008] A conversion mechanism, which includes a worm gear, a gear, a worm, and a motor. The worm gear is rotatably arranged on the base, the gear is coaxially and fixedly connected to the worm gear, the worm is meshed with the worm gear, and the motor is connected to the worm and is used to drive the worm to rotate; and,

[0009] An actuator mechanism, which includes a rack and a lock rod. The rack is slidably arranged on the base and is meshed with the gear. A limit groove for placing the buffer pad is formed on the rack, and the lock rod is fixed to the other end of the rack.

[0010] In some embodiments, a fixed pin is fixed on the base, a slot is formed in the center of the buffer pad, and the fixed pin is inserted into the slot.

[0011] In some embodiments, the conversion mechanism further includes a fixed shaft, the fixed shaft is fixed on the base, and the worm gear is rotatably sleeved on the fixed shaft.

[0012] In some embodiments, a chute is formed on the base, and the actuating mechanism further includes a slider and a connecting rod. The slider is slidably disposed in the chute. One end of the connecting rod is fixedly connected to the slider, and the other end of the connecting rod is fixedly connected to the rack.

[0013] In some embodiments, a stop block is formed at one end of the chute; the actuating mechanism further includes a return spring. The return spring is slidably sleeved on the connecting rod. One end of the return spring abuts against the slider, and the other end of the return spring abuts against the stop block.

[0014] In some embodiments, the actuating mechanism further includes a sleeve. The sleeve is fixed to the base and is slidably sleeved on the locking rod.

[0015] In some embodiments, the conversion mechanism further includes a bushing. The bushing is fixed to the base and is sleeved on one end of the worm.

[0016] In some embodiments, a first positioning groove is formed on the base, and the bushing is clamped in the first positioning groove.

[0017] In some embodiments, a second positioning groove is formed on the base, and the motor is clamped in the second positioning groove.

[0018] In some embodiments, the electric latch actuator further includes a cover plate, and the cover plate is detachably fixed to the base.

[0019] Compared with the prior art, the beneficial effects of the electric latch actuator provided by the present invention are as follows: When in use, when it is necessary to extend the locking rod, the motor drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the gear to rotate, the gear drives the rack to move, and the rack drives the locking rod to move, so that the locking rod extends, thereby realizing the function of the electric latch actuator. When the rack moves, since the buffer pad is fixed to the base and remains stationary, the position of the buffer pad in the limiting groove will change. When the locking rod is fully extended, the buffer pad abuts against one end of the limiting groove, thereby restricting the further extension of the locking rod. When the locking rod is fully retracted, the buffer pad abuts against the other end of the limiting groove, thereby restricting the further retraction of the locking rod, thus reducing the collision impact between the locking rod and the external lock body. Therefore, the noise of the electric latch actuator during locking or unlocking can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective structural schematic diagram of an electric latch actuator provided by an embodiment of the present invention;

[0021] Figure 2 is Figure 1 the perspective structural schematic diagram of the electric latch actuator in after omitting the cover plate;

[0022] Figure 3 is Figure 2 The three-dimensional structural schematic diagram of the electric latch actuator in

[0023] Figure 4 is Figure 2 The three-dimensional structural schematic diagram of the electric latch actuator in

[0024] Figure 5 is Figure 1 The three-dimensional structural schematic diagram of the base in

[0025] Explanation of the reference numerals in the drawings: 1 - base, 11 - fixing pin, 12 - sliding groove, 121 - stop block, 13 - first positioning groove, 14 - second positioning groove, 2 - conversion mechanism, 21 - worm gear, 22 - gear, 23 - worm, 24 - motor, 25 - fixing shaft, 26 - bushing, 3 - actuator, 31 - rack, 311 - limiting groove, 32 - locking rod, 33 - slider, 34 - connecting rod, 35 - return spring, 36 - sleeve, 4 - buffer pad, 41 - slot, 5 - cover plate. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] In order to solve the technical problem that the electric latch actuator will generate relatively large noise during locking or unlocking, which affects the use experience, the present utility model provides an electric latch actuator, which can reduce the noise of the electric latch actuator during locking or unlocking.

[0028] Please refer to Figures 1-4 , Figure 1 which is the structural schematic diagram of the electric latch actuator in an embodiment of the present utility model. The electric latch actuator includes a base 1, a conversion mechanism 2 and an actuator 3.

[0029] A buffer pad 4 is fixed on the base 1.

[0030] The conversion mechanism 2 includes a worm gear 21, a gear 22, a worm 23 and a motor 24. The worm gear 21 is rotatably arranged on the base 1. The gear 22 is coaxially and fixedly connected to the worm gear 21. The worm 23 meshes with the worm gear 21. The motor 24 is connected to the worm 23 and is used to drive the worm 23 to rotate.

[0031] The actuator 3 includes a rack 31 and a locking rod 32. The rack 31 is slidably disposed on the base 1 and meshes with the gear 22. A limiting groove 311 for placing the buffer pad 4 is formed on the rack 31. When the rack 31 is in the first position, the buffer pad 4 abuts against one end of the limiting groove 311. When the rack 31 is in the second position, the buffer pad 4 abuts against the other end of the limiting groove 311. The locking rod 32 is fixed to the other end of the rack 31. In this embodiment, the material of the buffer pad 4 is EPDM (ethylene propylene diene monomer).

[0032] During use, when it is necessary to extend the locking rod 32, the motor 24 drives the worm 23 to rotate. The worm 23 drives the worm wheel 21 to rotate. The worm wheel 21 drives the gear 22 to rotate. The gear 22 drives the rack 31 to move. The rack 31 drives the locking rod 32 to move, so that the locking rod 32 extends (as Figure 5 ), thereby realizing the function of the electric latch actuator. When the rack 31 moves, since the buffer pad 4 is fixed to the base 1 and remains stationary, the position of the buffer pad 4 in the limiting groove 311 will change. When the locking rod 32 is fully extended, the buffer pad 4 abuts against one end of the limiting groove 311, thereby restricting the further extension of the locking rod 32. When the locking rod 32 is fully retracted, the buffer pad 4 abuts against the other end of the limiting groove 311, thereby restricting the further retraction of the locking rod 32, thus reducing the collision impact between the locking rod 32 and the external lock body. Therefore, the noise of the electric latch actuator during locking or unlocking can be reduced.

[0033] Preferably, the motor is installed at the central position in the Z direction, and the overall structure is symmetric in the Z direction, with better installation compatibility.

[0034] In one embodiment, please refer to Figure 4 and Figure 5 , a fixing pin 11 is fixed on the base 1. A slot 41 is formed at the center of the buffer pad 4. The fixing pin 11 is inserted into the slot 41.

[0035] In one embodiment, please refer to Figures 2-5 , the conversion mechanism 2 further includes a fixed shaft 25. The fixed shaft 25 is fixed to the base 1. The worm wheel 21 is rotatably sleeved on the fixed shaft 25, thereby realizing the rotational connection between the worm wheel 21 and the base 1.

[0036] In one embodiment, please refer to Figures 2-5, a chute 12 is formed on the base 1. The actuating mechanism 3 further includes a slider 33 and a connecting rod 34. The slider 33 is slidably disposed in the chute 12. One end of the connecting rod 34 is fixedly connected to the slider 33, and the other end of the connecting rod 34 is fixedly connected to the rack 31. Since the slider 33 is slidably disposed in the chute 12, the movement of the rack 31 is guided, improving the stability of the movement process of the rack 31.

[0037] In one embodiment, please refer to Figures 2-4 , a stop block 121 is formed at one end of the chute 12; the actuating mechanism 3 further includes a return spring 35. The return spring 35 is slidably sleeved on the connecting rod 34. One end of the return spring 35 abuts against the slider 33, and the other end of the return spring 35 abuts against the stop block 121. In this embodiment, when it is necessary to retract the lock rod 32, the motor 24 is powered off. Under the restoring force of the return spring 35, the rack 31 moves, thereby driving the lock rod 32 to retract. At this time, the rack 31 also drives the gear 22 to rotate in the reverse direction. The gear 22 drives the worm gear 21 to rotate in the reverse direction. The worm gear 21 drives the worm 23 to rotate in the reverse direction. The worm 23 drives the output shaft of the motor 24 to rotate in the reverse direction.

[0038] In one embodiment, please refer to Figures 2-5 , the actuating mechanism 3 further includes a sleeve 36. The sleeve 36 is fixed to the base 1. The sleeve 36 is slidably sleeved on the lock rod 32. The movement of the lock rod 32 can be guided through the sleeve 36, improving the stability of the movement process of the lock rod 32.

[0039] In one embodiment, please refer to Figures 2-5 , the conversion mechanism 2 further includes a bushing 26. The bushing 26 is fixed to the base 1. The bushing 26 is sleeved on one end of the worm 23.

[0040] In one embodiment, please refer to Figures 2-5 , a first positioning groove 13 is formed on the base 1. The bushing 26 is clamped in the first positioning groove 13.

[0041] In one embodiment, please refer to Figures 2-5 , a second positioning groove 14 is formed on the base 1. The motor 24 is clamped in the second positioning groove 14.

[0042] In one embodiment, the electric latch actuator further includes a cover plate 5. The cover plate 5 is detachably fixed to the base 1. Preferably, the installation positions of the cover plate 5 and the base 1 interfere with each other to prevent gaps from being generated due to injection molding deformation after installation. Specifically, the interference distance is 0.05 mm.

[0043] To better understand the present utility model, the following will, in conjunction with Figures 1-5 describe the technical solution of the present utility model in detail: When in use, when it is necessary to extend the lock rod 32, the motor 24 drives the worm 23 to rotate, the worm 23 drives the worm wheel 21 to rotate, the worm wheel 21 drives the gear 22 to rotate, the gear 22 drives the rack 31 to move, and the rack 31 drives the lock rod 32 to move, so that the lock rod 32 extends (as shown in Figure 5 ), thereby realizing the function of the electric latch actuator. When it is necessary to retract the lock rod 32, the motor 24 is powered off. Under the restoring force of the return spring 35, the rack 31 moves, thereby driving the lock rod 32 to retract. At this time, the rack 31 also drives the gear 22 to rotate in the reverse direction, the gear 22 drives the worm wheel 21 to rotate in the reverse direction, the worm wheel 21 drives the worm 23 to rotate in the reverse direction, and the worm 23 drives the output shaft of the motor 24 to rotate in the reverse direction. When the rack 31 moves, since the buffer pad 4 is fixed to the base 1 and remains stationary, the position of the buffer pad 4 in the limit groove 311 will change. When the lock rod 32 is fully extended, the buffer pad 4 abuts against one end of the limit groove 311, thereby restricting the further extension of the lock rod 32. When the lock rod 32 is fully retracted, the buffer pad 4 abuts against the other end of the limit groove 311, thereby restricting the further retraction of the lock rod 32, so as to reduce the collision impact between the lock rod 32 and the external lock body. Therefore, the noise of the electric latch actuator during locking or unlocking can be reduced.

[0044] The above specific embodiments of the present utility model do not constitute a limitation on the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. An electric latch actuator, characterized in that: include: A base, on which a buffer pad is fixed; A conversion mechanism, comprising a worm wheel, a gear, a worm and a motor, wherein the worm wheel is rotatably arranged on the base, the gear is coaxially fixedly connected with the worm wheel, the worm is meshed with the worm wheel, and the motor is connected with the worm and used to drive the worm to rotate; as well as, The actuator comprises a rack and a locking rod, wherein the rack is slidably arranged on the base and meshes with the gear, a limiting groove for the buffer pad to be placed is opened on the rack, and the locking rod is fixed to the other end of the rack.

2. The electric latch actuator according to claim 1, characterized in that A fixing pin is fixed on the base, a slot is formed at the center of the buffer pad, and the fixing pin is inserted into the slot.

3. The electric latch actuator according to claim 1, characterized in that The conversion mechanism also includes a fixed shaft, the fixed shaft is fixed to the base, and the worm gear is rotatably sleeved on the fixed shaft.

4. The electric latch actuator according to claim 1, characterized in that A slide groove is formed on the base, and the actuator also includes a slider and a connecting rod. The slider is slidably arranged in the slide groove, one end of the connecting rod is fixedly connected to the slider, and the other end of the connecting rod is fixedly connected to the rack.

5. The electric latch actuator according to claim 4, characterized in that A stopper is formed at one end of the slideway; The actuator also includes a return spring, which is slidably sleeved on the connecting rod, one end of the return spring abuts against the sliding block, and the other end of the return spring abuts against the stopper.

6. The electric latch actuator according to claim 1, characterized in that The actuator also includes a sleeve, which is fixed to the base and slidably sleeved on the locking rod.

7. The electric latch actuator according to claim 1, characterized in that The conversion mechanism also includes a shaft sleeve, which is fixed to the base and sleeved on one end of the worm.

8. The electric latch actuator according to claim 7, characterized in that A first positioning groove is formed on the base, and the shaft sleeve is clamped in the first positioning groove.

9. The electric latch actuator according to claim 1, characterized in that A second positioning groove is formed on the base, and the motor is clamped in the second positioning groove.

10. The electric latch actuator according to claim 1, characterized in that It also includes a cover plate, which is detachably fixed to the base.

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