WO2023221976A1

WO2023221976A1 - Actuator and electronic lock

Info

Publication number: WO2023221976A1
Application number: PCT/CN2023/094520
Authority: WO
Inventors: 冯震宇
Original assignee: 富迈赫科技(上海)有限公司
Priority date: 2022-05-18
Filing date: 2023-05-16
Publication date: 2023-11-23
Also published as: CN218970883U

Abstract

The present application provides an actuator and an electronic lock. The actuator comprises a bolt and a position detection assembly; the position detection assembly comprises conductive elastic columns and a circuit board; the conductive elastic columns are fixedly connected to the bolt; the circuit board is provided, in the extension direction of the circuit board, with a conductive layer provided continuously or at intervals; and when the bolt linearly slides in a Y direction, the bolt can drive the conductive elastic columns to change conducting positions between the conductive elastic columns and the conductive layer.

Description

Actuators and electronic locks

This application claims priority to the Chinese patent application with application number 202221210907.7, which was submitted to the China Patent Office on May 18, 2022. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the field of actuator technology, for example to actuators and electronic locks.

Background technique

With the development of intelligent terminal consumer products represented by electric vehicles and smart home appliances, the demand for small precision actuators driven by DC micromotors is becoming more and more common. In order to ensure the reliability and safety of the actuator operation, the actuator is required to self-check its working status in real time, reliably and stably; in addition, it is also necessary to take into account the mass production of the self-check solution, that is, consider the manufacturing quality stability of the product. and cost reasonableness. The self-checking scheme of the actuator in the related art can easily lead to problems such as unstable working status detection and limited mass production.

Contents of the invention

This application provides an actuator and an electronic lock, and realizes the detection of the lock tongue through the position detection component. The control device adjusts the action of the driving device accordingly. The overall structure of the conductive elastic column is stable and reliable, is not prone to failure, has less structural wear, and has greater durability. high and reduce production costs.

In a first aspect, an actuator is provided, including a lock tongue and a position detection component, and the position detection component includes a conductive elastic column and a circuit board;

The conductive elastic column is fixedly connected to the lock tongue;

The circuit board is provided with a conductive layer arranged continuously or at intervals in the extension direction of the circuit board. When the lock tongue slides linearly in the Y direction, the lock tongue is configured to drive the conductive elastic column to change the conductive layer. The conductive position between the elastic column and the conductive layer.

As a technical solution of the actuator, the conductive elastic column includes a mounting base, an elastic member and a conductive column. The conductive column is embedded in the relief hole of the mounting base, and the elastic member is provided on the mounting base. , the two ends of the elastic member are respectively in contact with the mounting base and the conductive column, and the elastic member has a tendency to push the conductive column to extend outward.

As a technical solution of the actuator, the conductive layer is configured as a continuous integrated structure, the conductive layer extends in the same direction as the circuit board, and the lock tongue is configured to drive the conductive elastic column to move synchronously to change the The conductive position of the conductive elastic column and the conductive layer is adjusted to adjust the access conduction of the conductive layer. The length of the circuit.

As a technical solution of the actuator, the actuator further includes a driving device, the driving device is transmission connected with the lock tongue, and is configured to drive the lock tongue to reciprocate in the Y direction, and the driving device includes:

Rotary drive parts;

The spiral rod is transmission connected with the output end of the rotary drive member. The rotary drive member is configured to drive the spiral rod to rotate in the X direction. A spiral guide groove is provided on the peripheral wall of the spiral rod;

Transmission member, the first end of the transmission member is inserted into the guide groove, the second end of the transmission member is transmission connected with the lock tongue, and the screw rod is configured to be able to rotate around the X direction The transmission member drives the lock tongue to slide along the Y direction.

As a technical solution of the actuator, the lock tongue is provided with a slide groove, the slide groove is arranged at an angle with the Y direction in the X-Y plane, and the second end of the transmission member is inserted into the slide groove. In the slot, the transmission member is configured to move along the X direction driven by the screw rod, and at the same time, the second end of the transmission member is configured to slide along the chute.

As a technical solution of the actuator, the actuator further includes a guide block, the guide block is provided with a guide groove extending along the X direction, and the transmission member is provided with a corresponding guide convex block. The convex block is slidably disposed in the guide groove.

As a technical solution of the actuator, the actuator further includes a gear transmission assembly, the rotation drive member and the screw rod are transmission connected through the gear transmission assembly, and the input end of the gear transmission assembly is connected to the The output end of the rotary driving member is transmission connected, and the output end of the gear transmission assembly is transmission connected with one end of the screw rod.

As a technical solution of the actuator, the actuator further includes a control device, the control device is electrically connected to the driving device and the position detection component, and the control device is configured to obtain the position measured by the position detection component. signal, and controls the action of the driving device accordingly.

In a second aspect, an electronic lock is provided, including the actuator as described above.

Description of the drawings

Figure 1 is a schematic structural diagram of an actuator provided by an embodiment of the present application;

Figure 2 is a schematic diagram of the internal structure of an actuator provided by an embodiment of the present application;

Figure 3 is a schematic diagram of the internal structure of another actuator provided by an embodiment of the present application;

Figure 4 is a schematic diagram of the internal partial structure of an actuator provided by an embodiment of the present application;

Figure 5 is a partial structural schematic diagram of an actuator provided by an embodiment of the present application;

Figure 6 is a partial structural schematic diagram of another actuator provided by an embodiment of the present application;

Figure 7 is a combined view of a conductive elastic column and a circuit board provided by an embodiment of the present application;

Figure 8 is a cross-sectional view of the conductive elastic column along A-A' in Figure 7.

In the picture:

1. Rotary driving part; 2. Screw rod; 21. Guide groove; 3. Lock tongue; 31. Slide groove; 32. Locking column part; 321. First locking column; 322. Second locking column; 4. Transmission part ; 41. Guide bump; 5. Gear transmission assembly; 51. Input worm; 52. Transmission worm gear; 53. Transmission gear; 54. Output gear; 6. Conductive elastic column; 61. Mounting seat; 62. Elastic member; 63 , conductive pillar; 611, relief hole; 612, first fixed part; 613, second fixed part; 6131, limiting part; 6132, inner groove; 7, circuit board; 71, conductive layer; 8, guide block; 81. Guide groove; 9. Bottom shell; 10. Upper cover.

Detailed ways

The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings. The described embodiments are only some of the embodiments of the present application.

As shown in Figures 1 to 8, this embodiment provides an actuator, including a lock tongue 3, a driving device, a position detection component and a control device. Among them, the lock tongue 3 is slidably arranged along the Y direction; the driving device is transmission connected with the lock tongue 3 and is configured to drive the lock tongue 3 to reciprocate in the Y direction. The control device can be an STM or other type of single chip microcomputer, which can write a control program; position detection The component is configured to detect the position of the lock tongue 3 in the Y direction; the control device is electrically connected to the driving device and the position detection component. The control device can obtain the signal measured by the position detection component and control the action of the driving device accordingly to make the lock tongue 3 Stop swiping and/or reverse the direction of swiping.

The position detection component includes a circuit board 7 and a conductive elastic column 6. The circuit board 7 is arranged in the bottom case 9. The circuit board 7 extends along the Y direction. The circuit board 7 is provided with continuous or spaced conductive layers 71 in its extension direction. , the circuit board 7 is electrically connected to the control device; the conductive elastic column 6 is fixedly connected to the lock tongue 3, the conductive elastic column 6 is arranged corresponding to the conductive layer 71, the conductive elastic column 6 is electrically connected to the control device, and the lock tongue 3 slides linearly along the Y direction When the conductive elastic column 6 is moved, the conductive elastic column 6 can be driven to change the conductive position of the conductive elastic column 6 and the conductive layer 71, thereby adjusting the length of the conductive layer 71 connected to the conductive circuit, or selectively connecting the conductive layer 71 to the conductive circuit. .

Conductive elastic pillars (Pogo-pin) are widely used in signal and power transmission of consumer electronics products, such as smart watches and tablet computer data charging cable connectors. In related technologies, the elastic contact function of the conductive elastic column is used to ensure the reliability of data and power connections, and the conductive elastic column needs to be used in conjunction with the connection hole (Pogo-pin socket). During the application process, the conductive elastic column and the connection hole The relative position is fixed. In this application, a conductive elastic column is used to detect the relative movement position of the actuator moving component, which expands the detection direction dimension of the conductive elastic column, so that the detection direction of the conductive elastic column is not limited to the direction corresponding to its own elastic deformation; at the same time, this application The executor in does not set the Pogo-pin socket, and implements the Pogo-pin Apply individually. The conductive elastic column in this application solves the problems of poor production stability, easy deformation, and poor contact in traditional terminal detection solutions. The actuator provided in this embodiment drives the lock tongue 3 to reciprocate in the Y direction through the driving device to telescopically move in the actuator, thereby realizing locking and unlocking of the electronic lock. The position detection component detects the position of the lock tongue 3 in the Y direction. When it is measured that the lock tongue 3 is at the extension limit position, the control device controls the driving device to stop the action, and the lock tongue 3 stops extending; When it is at the retraction limit position, the control device controls the driving device to stop action, and the lock tongue 3 stops retracting accordingly. The actuator detects the lock tongue 3 through the position detection component, and the control device adjusts the action of the driving device accordingly. The overall structure of the conductive elastic column 6 is stable and reliable, has good durability, and is not prone to failure. Compared with solutions using mechanical limiting structures, the structure has less wear, higher durability, and reduced production costs. The actuator provided by this embodiment overcomes the problem that the self-checking scheme of the actuator in the related art can easily lead to unstable working status detection and limited mass production.

In this embodiment, the circuit board 7 is provided with a strip-shaped conductive layer 71 extending along the Y direction. When the conductive elastic column 6 slides with the lock tongue 3, it changes the conductive position with the conductive layer 71, thereby adjusting the connection of the conductive layer 71. into the conductive circuit, thereby changing the detection signal. The control device controls the action of the rotating driving member 1 by comparing the preset trigger signal and the actual measured signal to control the rotation direction of the rotating driving member 1 or stop the rotating driving member 1 action, thereby adjusting the moving direction of the lock tongue 3 and limiting the movement limit position of the lock tongue 3. The position detection component is arranged so that the actuator can automatically detect whether the lock tongue 3 moves to the innermost or outermost limit position, and automatically control the rotation drive member 1 to stop based on the detection signal.

In other embodiments, the front end and the rear end of the side of the circuit board 7 facing the lock tongue 3 may also be respectively provided with two mutually separated conductive layers 71 . When the rotary driving member 1 drives the lock tongue 3 to retract inward and move to the innermost position, the conductive elastic column 6 contacts and conducts the conductive layer 71 at the rear end of the circuit board 7, and the control device receives the first conduction signal. , and controls the rotary driving member 1 to stop; when the rotary driving member 1 drives the lock tongue 3 to extend outward and move to the outermost position, the conductive elastic column 6 contacts and conducts the conductive layer 71 at the front end of the circuit board 7 , the control device receives the second conduction signal and controls the rotational driving member 1 to stop moving. It can also realize the function of automatically controlling the rotating driving member 1 to stop moving.

The conductive elastic column 6 includes a mounting base 61, an elastic member 62 and a conductive column 63. The conductive column 63 is embedded in the relief hole 611 of the mounting base 61. The elastic member 62 is provided in the mounting base 61. The two ends of the elastic member 62 are respectively Contacting the mounting base 61 and the conductive post 63 , the elastic member 62 has a tendency to push the conductive post 63 to extend outward. The overall structure of the conductive elastic column 6 is stable and reliable, and the elastic part does not directly contact the circuit board 7. Therefore, the elastic part is not affected by friction and wear, has good durability, and is not prone to failure.

As shown in FIG. 8 , the mounting base 61 includes a first fixing part 612 and a second fixing part 613 . The second fixing part 613 is inserted into the relief hole 611 of the first fixing part 612 , and the second fixing part 613 passes through the second fixing part 612 . The limiting portion of 613 is engaged with the second fixing portion 613 . An inner groove 6132 is formed on the end of the second fixing part 613 opposite to the limiting part 6131. The elastic member 62 is disposed in the inner groove 6132. The conductive post 63 is partially inserted into the inner groove 6132 and the elastic member. 62 abuts, thereby forming the two ends of the elastic member 62 abutting the mounting base 61 and the conductive column 63 respectively, and the elastic member 62 has the effect of pushing the conductive column 63 to extend outward.

The second fixing part 613 has a conductive function. For example, the second fixing part 613 and the conductive post 63 are made of the same material, and the second fixing part 613 is configured to cooperate with the conductive post 63 to transmit signals. Therefore, the second fixing portion 613 can also be used as a part of the conductive pillar 63 .

When the conductive layer 71 is set as an integrated long strip structure, the conductive layer 71 can be made of resistive materials such as constantan, nickel-chromium alloy, carbonaceous materials, etc., to adjust the impedance in the conductive circuit and realize the signal Change: When multiple conductive layers 71 are provided separately, the conductive layers 71 can be made of low-resistance materials such as copper foil.

The driving device includes a rotating driving part 1, a screw rod 2 and a transmission part 4. The screw rod 2 is transmission connected with the output end of the rotating driving part 1. The rotating driving part 1 can drive the screw rod 2 to rotate around the X direction. The peripheral wall of the screw rod 2 is A spiral guide groove 21 is provided. The first end of the transmission member 4 is inserted into the guide groove 21. The second end of the transmission member 4 is drivingly connected to the lock tongue 3. The screw rod 2 can pass through the transmission member 4 when it rotates around the X direction. Drive the lock tongue 3 to slide in the Y direction.

The rotating driving part 1 drives the screw rod 2 to rotate around the The rod 2 drives the lock tongue 3 to slide along the Y direction through the transmission member 4. Since the extension direction of the screw rod 2 and the sliding direction of the lock tongue 3 are perpendicular to each other, the space occupied by the overall structure in the X direction or the Y direction is reduced, the utilization rate of the space is improved, and the overall structure is made more compact, which is beneficial to the electronic lock. The miniaturized design improves the versatility of the electronic lock; at the same time, the transmission structure composed of the screw rod 2 and the transmission member 4 achieves greater torque transmission and provides greater push-pull force for the lock tongue 3.

The lock tongue 3 is provided with a chute 31. The chute 31 is arranged at an angle with the Y direction in the X-Y plane. The second end of the transmission member 4 is inserted into the chute 31. The first end and the second end of the transmission member 4 Both ends are configured as round rod-shaped structures. The transmission member 4 can move along the X direction driven by the screw rod 2 , and at the same time, the second end of the transmission member 4 slides along the chute 31 . When the screw rod 2 rotates, the transmission member 4 moves along the guide groove 21 relative to the screw rod 2, while the posture of the transmission member 4 remains unchanged, the position of the transmission member 4 in the Y direction also remains unchanged, and the transmission member 4 moves along the X direction At this time, the chute 31 drives the lock tongue 3 to slide along the Y direction, thereby realizing the conversion from rotational motion to linear motion.

As shown in Figures 3 and 4, the actuator also includes a guide block 8. The guide block 8 is provided with a guide groove 81 extending in the arranged in the guide groove 81. The arrangement of the guide block 8 limits the posture of the transmission member 4 and its position in the Y direction, and provides guidance for the movement of the transmission member 4 .

The actuator also includes a bottom shell 9 and an upper cover 10. The bottom shell 9 is provided with a receiving cavity. The rotating driving member 1, the screw rod 2 and the transmission member 4 are all located in the receiving cavity. The lock tongue 3 is slidably arranged in the receiving cavity along the Y direction. in the cavity, and one of the lock tongue 3 The end extends out of the bottom shell 9 along the Y direction, and the upper cover 10 covers the open end of the accommodation cavity.

The guide block 8 and the bottom shell 9 are integrally formed.

The actuator also includes a gear transmission assembly 5. The rotary driving member 1 and the screw rod 2 are transmission connected through the gear transmission assembly 5. The input end of the gear transmission assembly 5 is transmission connected to the output end of the rotary driving member 1. The gear transmission assembly 5 The output end is drivingly connected to one end of the screw rod 2.

The gear transmission assembly 5 includes an input worm 51 , a transmission worm gear 52 , a transmission gear 53 and an output gear 54 . Among them, the input worm 51 is fixed at the output end of the rotary driving member 1. The input worm 51 is arranged along the Y direction. The transmission worm gear 52 is meshed and connected with the input worm 51. The transmission worm gear 52 is arranged to rotate around the X direction. The transmission gear 53 and the transmission worm gear 52 Coaxially arranged, and the transmission gear 53 and the transmission worm gear 52 rotate synchronously, the output gear 54 is fixed on one end of the screw rod 2, the output gear 54 and the transmission gear 53 are meshed and connected, and the diameter of the graduation circle of the output gear 54 is larger than that of the transmission gear 53 Pitch circle diameter. The above-mentioned gear transmission assembly 5 increases the torque transmitted from the rotary drive member 1 to the screw rod 2 through the setting of its own transmission ratio, increases the push-pull strength of the lock tongue 3, and improves the reliability of the actuator action.

The rotary driving part 1 adopts a rotary motor. In other embodiments, the rotation driving member 1 may also use other driving members such as a hydraulic motor.

The end of the lock tongue 3 extending out of the bottom case 9 is provided with a locking post portion 32. The locking post portion 32 includes a first locking post 321 and a second locking post 322. The first locking post 321 is located on the second locking post 322 away from the screw rod 2 At one end, the outer diameter of the first locking post 321 is smaller than the outer diameter of the second locking post 322 .

This embodiment also provides an electronic lock, including an actuator as described above. The actuator is arranged in the electronic lock body. The actuator drives the lock tongue 3 inside to extend and retract the electronic lock body to realize the electronic lock. of locking and unlocking.

Claims

An actuator, including a lock tongue (3) and a position detection component, the position detection component including a conductive elastic column (6) and a circuit board (7);

The conductive elastic column (6) is fixedly connected to the lock tongue (3);

The circuit board (7) is provided with a conductive layer (71) arranged continuously or at intervals in the extension direction of the circuit board (7). When the lock tongue (3) slides linearly along the Y direction, , the lock tongue (3) is configured to drive the conductive elastic column (6) to change the conductive position between the conductive elastic column (6) and the conductive layer (71).
The actuator according to claim 1, wherein the conductive elastic column (6) includes a mounting base (61), an elastic member (62) and a conductive column (63), and the conductive column (63) is embedded in the In the relief hole (611) of the mounting seat (61), the elastic member (62) is provided in the mounting seat (61), and the two ends of the elastic member (62) respectively abut the mounting seat. (61) and the conductive pillar (63), the elastic member (62) has the tendency to push the conductive pillar (63) to extend outward.
The actuator according to claim 1, wherein the conductive layer (71) is provided as a continuous integrated structure, the conductive layer (71) extends in the same direction as the circuit board (7), and the lock tongue (3) It is configured to drive the conductive elastic column (6) to move synchronously to change the conduction position between the conductive elastic column (6) and the conductive layer (71), thereby adjusting the connection of the conductive layer (71). length in the conductive circuit.
The actuator according to claim 1, further comprising a driving device, the driving device is transmission connected with the lock tongue (3), and is configured to drive the lock tongue (3) to reciprocate in the Y direction, the Drive units include:

Rotary drive (1);

The screw rod (2) is drivingly connected to the output end of the rotary driving member (1). The rotary driving member (1) is configured to drive the screw rod (2) to rotate around the X direction. The screw rod (2) ) is provided with a spiral guide groove (21) on its peripheral wall;

Transmission member (4), the first end of the transmission member (4) is inserted into the guide groove (21), and the second end of the transmission member (4) is transmission connected with the lock tongue (3), The screw rod (2) is configured to drive the lock tongue (3) to slide along the Y direction through the transmission member (4) when rotating around the X direction.
The actuator according to claim 4, wherein the lock tongue (3) is provided with a chute (31), the chute (31) is arranged at an angle with the Y direction in the X-Y plane, so The second end of the transmission member (4) is inserted into the chute (31), and the transmission member (4) is configured to move along the X direction driven by the screw rod (2). The second end of the transmission member (4) is configured to slide along the slide groove (31).
The actuator according to claim 5, further comprising a guide block (8) provided with a guide groove (81) extending along the X direction, and the transmission member (4) has a guide groove (81) extending along the X direction. A guide protrusion (41) is provided correspondingly, and the guide protrusion (41) is slidably disposed in the guide groove (81).
The actuator according to claim 4, further comprising a gear transmission assembly (5), the rotation drive member (1) and the screw rod (2) are transmission connected through the gear transmission assembly (5), so The input end of the gear transmission assembly (5) is drivingly connected to the output end of the rotary drive member (1), and the output end of the gear transmission assembly (5) is drivingly connected to one end of the screw rod (2).
The actuator according to claim 4, further comprising a control device electrically connected to the driving device and the position detection component, the control device being configured to obtain the signal measured by the position detection component, And control the action of the driving device accordingly.
An electronic lock includes the actuator according to any one of claims 1-8.