A clutch device for lock

Abstract

The present invention discloses a clutch device for lock, comprising: a box body and a control unit, wherein a driving motor, a worm, a worm wheel and a locking block are arranged in the box body, the output shaft of the driving motor is connected to the worm, one side of the worm is meshed with the worm wheel, a locking block is arranged on the side of the turbine away from the worm, one end of the locking block is provided with a rack, and the end of the locking block away from the rack is provided with a limiting sleeve, the control unit is electrically connected to the driving motor for controlling the operation of the driving motor; the end of the box body close to the limiting sleeve is provided with a first limiting hole for facilitating the extension of the limiting sleeve, and the end of the box body close to the rack is provided with a second limiting hole for facilitating the extension of the rack. The user of the present invention controls the driving motor to start and drive the worm through the control unit, and the worm wheel and worm drive to drive the locking block to extend in and out, thereby realizing the unlocking or locking process. The present invention solves the defect that the existing door locks generally have a lock hole, which has the risk of being cracked by tools such as unlocking tools and theft.

Description

Technical Field

[0001] The invention relates to the field of clutch devices for locks, and in particular to a clutch device for locks. Background Art

[0002] At present, most of the common household indoor door locks in our daily life use a rotary handle to open the door. When the safety is not locked, the door handle needs to be rotated to open the door whether indoors or outdoors. Such door locks generally have a keyhole, which poses a risk of being cracked and stolen by tools such as lock openers. Summary of the invention

[0003] In view of the above problems, the present invention proposes a clutch device for a lock, which solves the defect that the existing door locks generally have a keyhole, which leads to the risk of being cracked by tools such as a lock opener and theft.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A clutch device for a lock includes: a box body and a control unit, wherein a driving motor, a worm, a worm wheel and a locking block are arranged in the box body, the output shaft of the driving motor is connected to the worm, one side of the worm is meshed with the worm wheel, a locking block is arranged on the side of the worm wheel away from the worm, one end of the locking block is provided with a rack, and the end of the locking block away from the rack is provided with a limiting sleeve, the control unit is electrically connected to the driving motor for controlling the operation of the driving motor; the end of the box body close to the limiting sleeve is provided with a first limiting hole for facilitating the extension of the limiting sleeve, and the end of the box body close to the rack is provided with a second limiting hole for facilitating the extension of the rack. The control unit of the present invention controls the driving motor to start and drive the worm, the worm wheel and the worm gear drive, and drives the locking block to extend in and out, thereby realizing the unlocking or locking process, so that there is no need to set up an additional lock hole, avoiding the risk of being cracked by tools such as unlocking tools and theft.

[0006] Optionally, a sealing block is provided at one end of the locking block close to the limiting sleeve, and a spring is provided between the sealing block and the end of the limiting sleeve.

[0007] Optionally, a strip-shaped elastic membrane is provided on one side of the locking block.

[0008] Optionally, a plurality of mounting cavities are provided in the elastic membrane.

[0009] Optionally, an elastic ball is installed in the elastic membrane, and a conductive arc sheet is provided on a side of the elastic ball away from the outside.

[0010] Optionally, a conductive component is further provided in the installation cavity, and the conductive component includes a movable sheet, and conductive arc-shaped spring sheets are provided at both ends of the movable sheet.

[0011] Optionally, a resistor is installed in the middle of the movable sheet, and conductive hemispheres are installed at both ends of the resistor.

[0012] Optionally, the resistance of the conductive hemisphere is smaller than the resistance of the resistor.

[0013] Optionally, the conductive components of the multiple installation cavities are connected in series through wires and are respectively connected to two poles of an external power source to form a series closed loop.

[0014] Optionally, an ammeter is installed on the closed loop, the ammeter is electrically connected to a control unit, and the control unit is externally connected to an alarm.

[0015] Beneficial Effects

[0016] 1. The present invention controls the driving motor to start the worm through the control unit, and the worm gear drives the lock block to extend in and out to achieve the unlocking or locking process. In this way, there is no need to set an additional lock hole, avoiding the risk of being cracked by tools such as lock openers and theft.

[0017] 2. When the lock block of the present invention is extended, only when the limit sleeve covers the end wall of the locked part, the sealing block squeezes the gas in the limit sleeve, so that the elastic membrane protrudes outward, and the elastic ball on the elastic membrane squeezes the inner wall of the locked part. At this time, the conductive arc sheet contacts a pair of conductive hemispheres at the same time, so that the resistor sheet and the conductive arc sheet with lower resistance make the current value of the ammeter greater than a predetermined threshold value under the rated voltage. At this time, the control unit will turn off the drive motor, and the drive motor will be automatically turned off, and the alarm will not sound an alarm. When the drive motor cannot work normally, the lock block does not extend to the predetermined length, the elastic membrane will not protrude, and only part of the elastic ball squeezes the inner wall of the locked part. At this time, the current value of the ammeter will be lower than a predetermined threshold value under the rated voltage. The control unit will control the drive motor to work further, so that the alarm sounds an alarm, avoiding the dangerous situation that the lock block is not extended to a short length and the door is not locked tightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front structural diagram of a lock clutch device according to Embodiment 1 of the present invention;

[0019] Figure 2 The lock clutch device of embodiment 1 of the present invention Figure 1 AA section view;

[0020] Figure 3 The lock clutch device of embodiment 1 of the present invention Figure 2 A partial enlarged view of part A;

[0021] Figure 4 This is a flow chart of the lock clutch device control unit according to the first embodiment of the present invention.

[0022] The reference numerals in the figures are:

[0023] 1. Box body, 2. Control unit, 3. Drive motor, 4. Worm, 5. Worm wheel, 6. Lock block, 7. Rack, 8. Limit sleeve, 9. Sealing block, 10. Spring, 11. Elastic membrane, 12. Mounting cavity, 13. Elastic ball, 14. Conductive arc sheet, 15. Conductive component, 16. Movable sheet, 17. Conductive arc spring sheet, 18. Resistor, 19. Conductive hemisphere, 20. Ammeter, 21. Alarm. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1

[0027] The technical solution adopted by the present invention is as follows:

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the present invention discloses a clutch device for lock, comprising: a box body 1 and a control unit 2, wherein a driving motor 3, a worm 4, a worm wheel 5 and a locking block 6 are arranged in the box body, wherein the output shaft of the driving motor is connected to the worm, wherein one side of the worm engages with the worm wheel, wherein a locking block is arranged on the side of the worm wheel away from the worm, wherein one end of the locking block is provided with a rack 7, wherein the end of the locking block away from the rack is provided with a limiting sleeve 8, wherein the control unit is electrically connected to the driving motor and is used to control the operation of the driving motor. A first limiting hole is arranged at one end of the box body close to the limiting sleeve for facilitating the extension of the limiting sleeve, and a second limiting hole is arranged at one end of the box body close to the rack for facilitating the extension of the rack.

[0029] A sealing block 9 is provided at one end of the locking block close to the limiting sleeve, and a spring 10 is provided between the sealing block and the end of the limiting sleeve. A strip-shaped elastic membrane 11 is provided on one side of the locking block. A plurality of mounting cavities 12 are provided in the elastic membrane. An elastic ball 13 is installed in the elastic membrane, and a conductive arc sheet 14 is provided on the side of the elastic ball away from the outside. A conductive component 15 is also provided in the mounting cavity, and the conductive component includes a movable sheet 16, and conductive arc-shaped spring sheets 17 are provided at both ends of the movable sheet. The sealing block is used to seal the gas in the limiting sleeve.

[0030] A resistor 18 is mounted in the middle of the movable sheet, and conductive hemispheres 19 are mounted at both ends of the resistor.

[0031] The resistance of the conductive hemisphere is less than the resistance of the resistor. The conductive components of the multiple installation cavities are connected in series through wires and are respectively connected to the two poles of an external power supply to form a series closed loop. An ammeter 20 is installed on the closed loop, and the ammeter is electrically connected to a control unit, and the control unit is externally connected to an alarm 21.

[0032] The control unit of the present invention may adopt a computer system or a PLC (Programmable Logic Controller).

[0033] When this embodiment is implemented, the user controls the drive motor to rotate forward through the control unit, and drives the worm to rotate forward, and the worm gear is driven to drive the locking block to extend to achieve locking, and the clutch is in the first working state; the user controls the drive motor to reverse through the control unit, and drives the worm to reverse, and the worm gear is driven to drive the locking block to retract, and the rack to extend downward to achieve unlocking, and the clutch is in the second working state; when the external structure is opened, the limit sleeve receives external extrusion force, and the user controls the drive motor to rotate forward through the control unit, and the rack moves upward, and the internal spring is compressed at this time, and the limit sleeve is in an upward push state, which is a clutch locked state, and the clutch is in the third working state.

[0034] When in the first working state, when the lock block extends, only when the limit sleeve presses against the end wall of the locked part, the sealing block squeezes the gas in the limit sleeve, so that the elastic membrane protrudes outward, and the elastic ball on the elastic membrane squeezes the inner wall of the locked part. At this time, the conductive arc sheet contacts a pair of conductive hemispheres at the same time, so that the resistor sheet and the conductive arc sheet with lower resistance make the current value of the ammeter greater than a predetermined threshold value under the rated voltage. At this time, the control unit will turn off the drive motor, realize automatic shutdown of the drive motor, and will not cause the alarm to sound. When the drive motor cannot work normally, the lock block does not extend to the predetermined length. At this time, the elastic membrane will not protrude, and only part of the elastic ball squeezes the inner wall of the locked part. At this time, the current value of the ammeter will be lower than a predetermined threshold value under the rated voltage. The control unit will control the drive motor to work further, so that the alarm sounds, avoiding the dangerous situation that the lock block extends a short length and the door is not locked tightly. When the drive motor does not work, the alarm will be turned off.

[0035] When in the first working state, the conductive arc piece will not contact a pair of conductive hemispheres, and the current value of the ammeter will be at the minimum state under the rated voltage. When the drive motor stops working, the alarm will be turned off.

[0036] When in the third working state, the drive motor rotates forward and the rack moves upward. At this time, the internal spring is compressed and the limit sleeve is in an upward state. At this time, the sealing block squeezes the gas in the limit sleeve, causing the elastic membrane to protrude outward, and the elastic ball on the elastic membrane squeezes the inner wall of the box body. At this time, the conductive arc sheet contacts a pair of conductive hemispheres at the same time, so that the resistor sheet and the conductive arc sheet with lower resistance make the current value of the ammeter greater than a predetermined threshold under the rated voltage. At this time, the drive motor rotates forward, and the control unit receives a current signal, and the control unit turns off the drive motor.

[0037] Example 2

[0038] A clutch device for a lock comprises: a box body and a control unit, wherein a driving motor, a worm, a worm wheel and a locking block are arranged in the box body, the output shaft of the driving motor is connected to the worm, one side of the worm is engaged with the worm wheel, a locking block is arranged on a side of the worm wheel away from the worm, one end of the locking block is provided with a rack, and the end of the locking block away from the rack is provided with a limiting sleeve, a first limiting hole is provided at one end of the box body close to the limiting sleeve for facilitating the extension of the limiting sleeve, and a second limiting hole is provided at one end of the box body close to the rack for facilitating the extension of the rack, and the control unit is electrically connected to the driving motor for controlling the operation of the driving motor.

[0039] When this embodiment is implemented, the user controls the drive motor to rotate forward through the control unit, and drives the worm to rotate forward, and the worm gear is driven to drive the locking block to extend to achieve locking, and the clutch is in the first working state; the user controls the drive motor to reverse through the control unit, and drives the worm to reverse, and the worm gear is driven to drive the locking block to retract, and the rack to extend downward to achieve unlocking, and the clutch is in the second working state; when the external structure is opened, the limit sleeve receives external extrusion force, and the user controls the drive motor to rotate forward through the control unit, and the rack moves upward. At this time, the internal spring is compressed, and the limit sleeve is in an upward push state, which is a clutch locked state, and the clutch is in the third working state.

[0040] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A clutch device for a lock, characterized in that: include: A box body and a control unit, wherein a driving motor, a worm, a worm wheel and a locking block are arranged in the box body, the output shaft of the driving motor is connected to the worm, one side of the worm is meshed with the worm wheel, a locking block is arranged on the side of the worm wheel away from the worm, one end of the locking block is provided with a rack, and the end of the locking block away from the rack is provided with a limiting sleeve, the control unit is electrically connected to the driving motor for controlling the operation of the driving motor; a first limiting hole is provided at one end of the box body close to the limiting sleeve for facilitating the extension of the limiting sleeve, and a second limiting hole is provided at one end of the box body close to the rack for facilitating the extension of the rack; a strip-shaped elastic membrane is arranged on one side of the locking block; a Multiple installation cavities; an elastic ball is installed in the elastic membrane, and a conductive arc sheet is provided on the side of the elastic ball away from the outside; a conductive component is also provided in the installation cavity, and the conductive component includes a movable sheet, and conductive arc-shaped springs are provided at both ends of the movable sheet; a resistor is installed in the middle of the movable sheet, and conductive hemispheres are respectively installed at both ends of the resistor; the resistance of the conductive hemisphere is smaller than the resistance of the resistor; the conductive components of the multiple installation cavities are connected in series through wires and are respectively connected to the two poles of an external power supply to form a series closed loop; an ammeter is installed on the closed loop, and the ammeter is electrically connected to a control unit, and the control unit is externally connected to an alarm.

2. A lock clutch device as claimed in claim 1, characterized in that: A sealing block is arranged at one end of the locking block close to the limiting sleeve, and a spring is arranged between the sealing block and the end of the limiting sleeve.

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