CN211524418U - an electric lock - Google Patents

Abstract

The utility model relates to a lock, in particular to an electric lock. It includes a box body, the top of the box body is provided with a notch, and the box body corresponding to the notch is provided with a locking mechanism, and the locking mechanism is connected with an electric unlocking device. The electric unlocking device includes a micro switch and a drive mechanism. There are side protruding teeth on the locking mechanism corresponding to the micro switch. Its characteristic is that the driving mechanism includes a toggle mechanism and a motor, the toggle mechanism includes a driven gear located below the locking mechanism, a cam is concentrically arranged on the driven gear, and the locking mechanism above the cam has lower convex teeth, and the motor is decelerated by deceleration. The gear set is connected with the driven gear, so that the cam is driven to toggle the convex teeth to drive the locking mechanism to unlock. Both poles of the motor are connected with wires, both wires extend out of the box, and the micro switch is connected in series with one of the wires. The electric lock has small working voltage and current, low energy consumption, simple structure, low cost and reliable unlocking.

Description

an electric lock

technical field

The utility model relates to a lock, in particular to an electric lock capable of remote control or wireless control. Especially suitable for storage devices in IoT systems.

Background technique

Electric locks can be widely used in environments that require small storage needs such as remote control or wireless control, and can meet the development needs of the Internet of Things. Electric locks generally use manual locking and electric drive unlocking.

The Chinese invention patent with the application number of 2018202329958 discloses a shared locker lock, which includes a lock body, a lock piece and an upper unlocking assembly. The lock body is inserted laterally and fixed in the cabinet frame, the upper unlocking assembly is set in the lock body, one end of the lock piece is set on the side of the lock body, and the other end of the lock piece rotates around one end to realize and install the other on the adjacent cabinet frame. The lock/unlock fit between the locker lock's lock/unlock components. The unlocking component is an electromagnet unlocking component. This shared locker lock uses an electromagnet as the power unit for electric unlocking. However, the power of electromagnets is generally larger, requires higher working voltage (generally greater than 12V), and has higher energy consumption. In the industry, stepper motors are also used instead of electromagnets as power devices for electric unlocking. However, the structure of the stepper motor is complex and the cost is high, and an additional control circuit is required to control the rotation range of the stepper motor. The control circuit is complicated, and when the stepper motor is used to drive, there will be interference between the stop position of the unlocking component and the locking mechanism. In this case, the locking mechanism cannot be reset to the fully unlocked position, and there is a problem of unreliable unlocking.

Utility model content

The technical problem to be solved by the utility model is to provide an electric lock, which has small working voltage and current, low energy consumption, simple structure, low cost and reliable unlocking.

To solve the above problems, the following technical solutions are provided:

The electric lock of the utility model comprises a box body, the top of the box body is provided with a notch, and the box body corresponding to the notch is provided with a locking mechanism, and the locking mechanism is connected with an electric unlocking device. The electric unlocking device includes a micro switch and a driving mechanism. The micro-switch is located on one side of the locking mechanism, and the locking mechanism corresponding to the micro-switch is provided with side protruding teeth, so as to push the pressing sheet of the micro-switch to close. It is characterized in that the driving mechanism includes a toggle mechanism and a motor, the toggle mechanism includes a driven gear located below the locking mechanism, the driven gear is concentrically provided with a cam, and the locking mechanism above the cam has lower convex teeth. , the motor is connected with the driven gear through the reduction gear set, so as to drive the cam to toggle the convex teeth to drive the locking mechanism to unlock. Both poles of the motor are connected with wires, both wires extend out of the box, and the micro switch is connected in series with one of the wires.

The locking mechanism includes a buckle plate and a limit plate, the buckle plate is hinged in the box body on one side of the gap, the limit plate is hinged in the box body on the other side of the gap, and the buckle plate and the limit plate are connected to the box body. There are torsion springs in between. The upper part of one side of the gusset plate corresponding to the limit plate is provided with a lock groove, the gusset plate corresponding to the lower part of the lock groove extends to one side of the limit plate, and the outer end of the extension part of the gusset plate has limit teeth, and the corresponding limiter of the gusset plate is limited. The upper limit slot on one side of the bit plate.

The micro switch is located on the side of the buckle plate away from the limit plate, and the side protruding teeth are fixed on the buckle plate. The tab of the micro switch is closed. The micro switch is connected in series on one of the wires through the common terminal and the normally open terminal.

The output shaft of the motor is concentrically connected with a worm, the reduction gear set includes a helical gear and not less than one reduction gear, a first pinion is coaxially fixed on the helical gear, the helical gear is meshed with the worm, and the first pinion is coaxially fixed on the helical gear. The pinion gear meshes with the reduction gear, and the reduction gear meshes with the driven gear.

There is one reduction gear, the reduction gear includes a large gear and a second pinion, the first pinion meshes with the large gear, and the second pinion meshes with the driven gear.

The side wall of the box body under the gusset plate is provided with a way-out slot, one end of the way-out slot is located on the side wall of the box body, and the other end of the way-out slot is provided with a support plate, which is located on one end of the way-out slot on the side wall of the box body There are horizontally arranged support columns, and the support plates corresponding to the support columns are provided with pull rods, two ends of the pull rods respectively protrude from both sides of the support plates, and the pull rods and the support plates are in sliding fit. The support column is provided with an axial through hole, and a pull rope is arranged in the axial through hole. One end of the pull rope is connected with the pull rod, and one end of the pull rod away from the pull rope is connected with the limit plate. There is a return spring on it.

The above scheme has the following advantages:

Because the driving mechanism of the electric lock of the present invention includes a toggle mechanism and a motor, the toggle mechanism includes a driven gear located below the locking mechanism, the driven gear is provided with a cam concentrically, and the locking mechanism above the cam has a downward protrusion. The motor is connected with the driven gear through the reduction gear set, the two poles of the motor are connected with wires, both wires extend out of the box, and the micro switch is connected in series on one of the wires. When in use, connect the extended ends of the two wires to an external control power supply. When the locking mechanism is in a locked state, the side protruding teeth of the locking mechanism bear against the micro-switch pressing sheet, so that the micro-switch is in a conducting state. When it needs to be unlocked, the control power supplies power to the motor through the micro switch, the motor rotates, and then drives the driven gear and the cam to rotate through the reduction gear set, and the cam moves the convex teeth to drive the lock mechanism to rotate to the unlocked side, and the lock mechanism is unlocked. , at this time, the side convex teeth of the locking mechanism release the pressing piece of the micro switch, the micro switch is in the off state, and the motor loses power. Due to the action of inertia, the cam leaves the rotation range of the lower convex teeth to ensure the smooth locking mechanism. Rotate to fully unlocked position. This kind of electric lock is driven by a motor, and the locking mechanism can be unlocked by increasing the torque through the reduction gear set. The unlocking requirement can be completed by a small ordinary motor, and the required power is small, which greatly reduces the working voltage (generally 1.5V, that is, a dry battery can be used as the power source), and the energy consumption is low. Moreover, the small motor has a simple structure and low cost. At the same time, the power-off control can be completed by disconnecting the micro-switch, without additional control circuit, and the power-off is instantaneous through the micro-switch, under the action of inertia, it can ensure that the cam will leave the rotation range of the locking mechanism every time, ensuring that The locking mechanism is smoothly rotated to the fully unlocked position, thereby avoiding the problem of unreliable unlocking.

Description of drawings

1 is a schematic structural diagram of the electric lock of the present invention in a locked state (the cover of the box body is omitted);

2 is a schematic structural diagram of the electric lock of the present invention at the moment of tripping (the cover of the box body is omitted);

3 is a schematic structural diagram of the electric lock of the present invention in an unlocked state (the cover of the box body is omitted).

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 1 , the electric lock of the present invention includes a box body 1, the top of the box body 1 has a notch 5, and the box body 1 corresponding to the notch 5 has a lock mechanism in the box body 1, and the lock mechanism is connected with an electric unlocking device. The electric unlocking device includes a micro switch 2 and a driving mechanism. The micro switch 2 is located on one side of the locking mechanism, and the locking mechanism corresponding to the micro switch 2 has side protruding teeth 3 so as to push the pressing piece of the micro switch 2 to close. The driving mechanism includes a toggle mechanism and a motor 19. The toggle mechanism includes a driven gear 13 located below the locking mechanism. The driven gear 13 is provided with a cam 14 concentrically. The protruding teeth 12, the motor 19 is connected with the driven gear 13 through the reduction gear set, so that the cam 14 is driven to move the protruding teeth to drive the locking mechanism to unlock. Both poles of the motor 19 are connected with wires 20 , both of which extend out of the box 1 , and the micro switch 2 is connected in series with one of the wires 20 .

The locking mechanism includes a buckle plate 4 and a limit plate 8. The buckle plate 4 is hinged in the box body 1 on one side of the gap 5, and the limit plate 8 is hinged in the box body 1 on the other side of the gap 5. There are torsion springs between the plate 4 and the limiting plate 8 and the box body 1 . The locking groove 6 is located on the upper part of the side of the locking plate 4 corresponding to the limiting plate 8 , the locking plate 4 corresponding to the lower part of the locking groove 6 extends to the side of the limiting plate 8 , and the outer end of the extension part of the locking plate 4 is limited The tooth 7, the upper limit slot 81 on the side of the limit plate 8 corresponding to the gusset plate 4.

The micro switch 2 is located on the side of the gusset plate 4 away from the limit plate 8, and the side protruding teeth 3 are fixed on the gusset plate 4. When the locking mechanism is in the locked state, the side protruding teeth 3 are pressed against the micro-movement. On the pressing piece of the switch 2, the pressing piece of the micro switch 2 is in a closed state. The micro switch 2 is connected in series on one of the wires 20 through the common terminal and the normally open terminal.

A worm 17 is concentrically connected to the output shaft of the motor 19. The reduction gear set includes a helical gear 18 and no less than one reduction gear. A first pinion is coaxially fixed on the helical gear 18. The worm 17 meshes with the first pinion gear, and the reduction gear meshes with the driven gear 13 .

There is one reduction gear. The reduction gear includes a large gear 15 and a second pinion. The first pinion meshes with the large gear 15 , and the second pinion meshes with the driven gear 13 .

The side wall of the box body 1 below the buckle plate 4 is provided with a side wall of the box body 23, one end of the side wall of the box body 1 is located on the side wall of the box body 1, and the other end of the side wall of the box body 1 is provided with a support plate 24, which is located on the side of the box body 1. There is a horizontally arranged support column 22 on one end of the giving way groove 23 on the wall, and a support plate 24 corresponding to the support column 22 has a pull rod 9. The support plates 24 are in sliding fit. The support column 22 has an axial through hole, and a pull rope 21 is arranged in the axial through hole. shape match. One end of the pull rope 21 is connected to the pull rod 9, and one end of the pull rod 9 away from the pull rope 21 is connected to the limit plate 8. The stretch rod 9 between the limit plate 8 and the support plate 24 is provided with a spring seat 10. The spring seat There is a return spring 11 on the section of the pull rod 9 between the 10 and the limit plate 8 .

When in use, the electric lock is installed on the storage device, and the extending ends of the two wires 20 of the electric lock are connected to the control power supply of the storage device. When the storage device is closed, the lock of the storage device is pressed into the notch 5 of the electric lock by external force, and the lock pushes the buckle plate 4 through the extension of the buckle plate 4, so that the limit teeth 7 of the buckle plate 4 enter the limit In the limiting groove 81 of the plate 8, at this time, under the action of the torsion spring, the limiting plate 8 limits the position of the buckle plate 4, and the locking groove 6 limits the lock to the notch 5 to complete the locking. After locking, the side protruding teeth 3 press against the micro switch 2, so that the common terminal of the micro switch 2 and the normally open terminal are in a conducting state, as shown in Figure 1. When it needs to be unlocked, the control power supply of the storage device supplies power to the motor 19 through the micro switch 2, the motor 19 rotates, and then drives the driven gear 13 and the cam 14 to rotate through the reduction gear set, and the cam 14 turns the convex teeth to drive the limit plate 8. Rotate to the unlocked side, so that the limiting teeth 7 of the gusset plate 4 leave the limiting grooves 81 of the limiting plate 8, as shown in FIG. 2 . Then, under the action of the torsion spring, the buckle plate 4 returns to the unlocked position, the restriction of the lock groove 6 on the lock is eliminated, and the unlocking is completed. The common terminal of the movable switch 2 is disconnected from the normally open terminal, and the motor 19 loses power. Due to the action of inertia, the cam 14 leaves the movement range of the lower protruding teeth 12 to ensure the reset of the limit plate 8, as shown in FIG. 3 .

In the actual use process, the position of the micro switch 2 can be changed, so that the micro switch 2 can be connected in series to a wire 20 of the motor 19 through the common terminal and the normally closed terminal. That is, when locking, the side protruding teeth 3 are separated from the micro switch 2 and pressed, so that the common terminal of the micro switch 2 and the normally closed terminal are in a conducting state. After unlocking, the side protruding teeth 3 press the micro switch 2 to press piece, so that the common terminal and the normally closed terminal of the micro switch 2 are in a disconnected state.

Claims (6)

1. An electric lock comprises a box body (1), wherein a gap (5) is formed in the top of the box body (1), a locking mechanism is arranged in the box body (1) corresponding to the gap (5), and the locking mechanism is connected with an electric unlocking device; the electric unlocking device comprises a microswitch (2) and a driving mechanism; the microswitch (2) is positioned at one side of the latching mechanism, and a side tooth (3) is arranged on the latching mechanism corresponding to the microswitch (2) so as to push a pressing sheet of the microswitch (2) to be closed; the automatic unlocking device is characterized in that the driving mechanism comprises a shifting mechanism and a motor (19), the shifting mechanism comprises a driven gear (13) positioned below the locking mechanism, a cam (14) is concentrically arranged on the driven gear (13), a lower convex tooth (12) is arranged on the locking mechanism above the cam (14), and the motor (19) is connected with the driven gear (13) through a reduction gear set so as to drive the cam (14) to shift the convex tooth to drive the locking mechanism to unlock; the two poles of the motor (19) are connected with wires (20), the two wires (20) extend out of the box body (1), and the micro switch (2) is connected to one of the wires (20) in series.

2. An electric lock according to claim 1, characterized in that the locking mechanism comprises a buckle plate (4) and a limit plate (8), the buckle plate (4) is hinged in the box body (1) on one side of the notch (5), the limit plate (8) is hinged in the box body (1) on the other side of the notch (5), and torsion springs are arranged between the buckle plate (4) and the limit plate (8) and the box body (1); there is locked groove (6) on the upper portion of buckle (4) one side that limiting plate (8) correspond, and buckle (4) that this locked groove (6) lower part corresponds extend to limiting plate (8) one side, and there is spacing tooth (7) in the outer end of buckle (4) extension, and there is spacing groove (81) on the upper portion of limiting plate (8) one side that buckle (4) correspond.

3. An electric lock according to claim 2, characterized in that the microswitch (2) is located on the side of the buckle plate (4) remote from the limit plate (8), the side teeth (3) are fixed on the buckle plate (4), when the locking mechanism is in the locking state, the side teeth (3) press on the pressing piece of the microswitch (2), so that the pressing piece of the microswitch (2) is in the closed state; the micro switch (2) is connected in series on one of the leads (20) through a common terminal and a normally open terminal.

4. An electric lock according to claim 2, characterized in that the output shaft of said motor (19) is concentrically connected to a worm (17), said reduction gear set comprising a helical gear (18) and at least one reduction gear, the helical gear (18) having coaxially fixed thereto a first pinion, the helical gear (18) being in mesh with said worm (17), the first pinion being in mesh with a reduction gear, the reduction gear being in mesh with said driven gear (13).

5. An electric lock according to claim 4, characterized in that one of said reduction gears comprises a gearwheel (15) and a second pinion, said first pinion meshing with the gearwheel (15) and said second pinion meshing with said driven gear (13).

6. An electric lock according to any one of claims 2 to 4, characterized in that the side wall of the box body (1) below the pinch plate (4) is provided with an abdicating groove (23), one end of the abdicating groove (23) is positioned on the side wall of the box body (1), the other end of the abdicating groove (23) is provided with a support plate (24), one end of the abdicating groove (23) positioned on the side wall of the box body (1) is provided with a support column (22) which is horizontally arranged, the support plate (24) corresponding to the support column (22) is provided with a pull rod (9), two ends of the pull rod (9) respectively extend out from two sides of the support plate (24), and the pull rod (9) is in sliding fit with the support plate (24); the supporting column (22) is provided with an axial through hole, a pull rope (21) is arranged in the axial through hole, two ends of the pull rope (21) respectively extend out of two ends of the supporting column (22), and the pull rope (21) is in sliding fit with the supporting column (22); stay cord (21) one end links to each other with pull rod (9), pull rod (9) one end of keeping away from stay cord (21) with limiting plate (8) link to each other, have spring holder (10) on that section pull rod (9) between limiting plate (8) and backup pad (24), have reset spring (11) on that section pull rod (9) between spring holder (10) and limiting plate (8).

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