CN218912539U - Key unlocking mechanism and lockset - Google Patents

Abstract

The utility model discloses a key unlocking mechanism and a lockset, comprising a bracket, wherein one end of the bracket is provided with an unlocking sleeve, the other end of the bracket is provided with a motor, and a driving shaft of the motor extends into the bracket; one end of the unlocking sleeve, which is away from the bracket, is provided with an unlocking rod, one end of the unlocking rod, which is close to the unlocking sleeve, penetrates through the unlocking sleeve and stretches into the bracket, a push rod is arranged between the unlocking rod and the motor, one end of the push rod is sleeved on a motor shaft of the motor, and the other end of the push rod stretches into the unlocking rod; a reset spring is arranged in the bracket, one end of the reset spring is sleeved on a driving shaft of the motor, and the other end of the reset spring is connected with the push rod; two guide grooves are formed in the outer wall of the unlocking rod, the two guide grooves are symmetrical in center with the axis of the unlocking rod, a locking groove is formed in each guide groove, two limiting rods are arranged on the outer wall of the push rod, and the end parts of the limiting rods at least partially extend into the locking grooves. The utility model can reduce the power consumption degree of the lockset and prolong the service life of the lockset.

Description

Key unlocking mechanism and lockset

Technical Field

The utility model belongs to the technical field of key unlocking, and particularly relates to a key unlocking mechanism and a lockset.

Background

In the production process of enterprises such as electric power, chemical industry, oil, etc., all need adopt the safety lock in needs production facility, the safety lock is unable unblock safety lock under unauthorized state, only can unlock safety lock after needs unlocking the key to authorize.

The existing key unlocking mode mainly adopts an electromagnet attraction mode or a motor rotation mode to realize the authorization of the key through the key and the lock core. When the electromagnet is in use, continuous power supply is needed to maintain the magnetic attraction force of the electromagnet, so that the power consumption degree is high; the motor rotates mainly by adopting a motor rotation feedback locked rotor signal after the motor rotates in place to supply power to the micro-control unit (or the time required by the motor rotation in place is calculated, and the micro-control unit is powered off when the power supply time is ended), so that uninterrupted power supply is required to be supplied to the motor during use, and the power consumption degree is high.

Disclosure of Invention

The utility model aims to provide a key unlocking mechanism and a lockset, which can reduce the power consumption degree of the lockset and prolong the service life of the lockset.

The technical scheme for achieving the aim comprises the following steps.

The utility model provides a key unlocking mechanism, which comprises a bracket, wherein one end of the bracket is provided with a motor, a driving shaft of the motor extends into the bracket, the other end of the bracket is provided with a push rod, the push rod comprises a first end and a second end, the distance from the peripheral wall of the first end to the axis of the push rod is larger than the distance from the peripheral wall of the second end to the axis of the push rod, the first end at least partially extends into the bracket, and the first end is sleeved outside a motor shaft of the motor and is elastically connected with the motor;

an unlocking rod is sleeved outside the push rod, an unlocking sleeve is sleeved outside the unlocking rod, at least two locking pieces are arranged on the unlocking rod, the bottom ends of the locking pieces extend into the unlocking rod to be propped against the first end, the top ends of the locking pieces are propped against the inner wall of the unlocking sleeve, or the bottom ends of the locking pieces extend into the unlocking rod to be propped against the second end, and a movable gap is reserved between the top ends of the locking pieces and the inner wall of the unlocking sleeve;

two guide grooves are formed in the unlocking rod, locking grooves are formed in the end portions of the guide grooves, the guide grooves are symmetrical in center with the axis of the unlocking rod, two limiting rods are arranged on the first end, and the end portions of the limiting rods extend into the locking grooves.

In some embodiments, a first mounting hole is formed in the unlocking rod, the guide groove is communicated with the first mounting hole, the second end of the push rod and a part of the first end extend into the first mounting hole, a second mounting hole is formed in the unlocking sleeve, and the end part of the unlocking rod penetrates through the second mounting hole and extends into the bracket.

In some embodiments, at least two first through holes are formed in the outer wall of the unlocking rod, the first through holes are communicated with the first mounting holes, a limiting groove is formed in one end, close to the bracket, of the second mounting holes, a first gap is formed between the outer peripheral wall of the unlocking rod and the inner peripheral wall of the limiting groove, the first through holes are located below the limiting groove, locking pieces are arranged in the first through holes, and the bottom ends of the locking pieces extend into the first mounting holes.

In some embodiments, a connecting hole is formed in the first end of the push rod, a driving shaft of the motor at least partially stretches into the connecting hole, a motor shaft of the motor is in clamping fit with the connecting hole, a reset spring is sleeved on the driving shaft of the motor, and the end part of the reset spring is propped against the wall of the connecting hole.

In some embodiments, the distance from the outer peripheral wall of the first end of the push rod to the axis of the push rod is greater than the distance from the outer peripheral wall of the second end to the axis of the push rod, a second gap is formed between the outer peripheral wall of the second end and the inner peripheral wall of the first mounting hole, the locking piece and the unlocking sleeve form a first state or a second state, and the push rod moves in the first mounting hole to form a first position and a second position with the motor;

in the first state, the push rod moves to a second position in the motor direction at a first position, the reset spring is compressed, the second end is displaced below the first through hole, the bottom end of the locking piece is abutted against the outer wall of the second end, and the movable gap is formed between the top end and the inner wall of the limiting groove, so that an unlocking state is formed;

under the second state, the push rod is reset under the action of the elastic force of the reset spring, the push rod moves to the first position from the second position to the unlocking sleeve direction, the second end is displaced to the lower part of the first through hole, the bottom end of the locking piece is propped against the outer wall of the first end, and the top end of the locking piece is propped against the inner wall of the limiting groove to form a locking state.

In some embodiments, a guide surface is formed on a groove wall of the guide groove, an inclined included angle is formed between the guide surface and the axis of the unlocking rod, the guide surface is inclined from one end of the support to one end of the unlocking rod, the locking groove is triangular, a locking surface is formed on an inner wall of the locking groove, which is close to one side of the support, and the end of the locking surface extends into the guide groove along the radial direction of the unlocking rod.

In some embodiments, an unlocking head is arranged at the end part of the unlocking rod, which is away from the bracket, at least two first grooves are formed in the unlocking head, the first grooves are arranged in an annular array along the axis of the unlocking rod, and the locking piece is in sliding fit with the first grooves.

In some embodiments, a cover body is sleeved on the unlocking sleeve, a first connecting plate is arranged at one end, close to the support, of the cover body, a connecting convex edge extending towards the direction of the support is arranged on the periphery edge of the first connecting plate, a second connecting plate is arranged on the support, and the connecting convex edge is sleeved on the periphery wall of the second connecting plate.

In some embodiments, a mounting groove is formed in the bracket, the motor is arranged in the mounting groove, a fixing plate is sleeved at one end of the motor, which is away from the bracket, and the fixing plate is in threaded fit with the bracket; the end part of the unlocking rod stretches into the mounting groove.

The utility model also provides a lockset, which comprises a lock core, wherein the lock core is provided with an unlocking hole for inserting an unlocking rod of the key unlocking mechanism, the end part of the lock core is fixedly provided with a code chip, a code reading coil and a control board are fixedly arranged in the bracket, the code reading coil is connected with the control board, and the code reading coil is in inductive fit with the code chip.

According to the key unlocking mechanism and the lock, one end of the bracket is provided with the motor, the motor is connected with the push rod, the unlocking rod is sleeved on the push rod, the unlocking rod is sleeved with the unlocking sleeve, the unlocking rod is provided with the two guide grooves which are symmetrically arranged in the center in the axial direction of the unlocking rod, the end parts of the guide grooves form locking grooves, the outer wall of the first end of the push rod is provided with the two limiting rods, part of each limiting rod extends into each locking groove, at least two locking pieces are arranged on the unlocking rod, the bottom ends of the locking pieces extend into the unlocking rod to be pressed on the first end of the push rod, the top ends of the locking pieces are pressed on the inner wall of the unlocking sleeve, or the bottom ends of the locking pieces extend into the unlocking rod to be pressed on the second end of the push rod, and the top ends of the locking pieces and the inner wall of the unlocking sleeve have movable gaps;

in an initial state, the bottom end of the locking piece is propped against the outer wall of the first end of the push rod, the top end of the locking piece is propped against the inner wall of the unlocking sleeve, when the key unlocking mechanism and the lock cylinder to be unlocked are authorized by mistake, the motor does not operate, the limiting rod of the push rod is positioned in the locking groove, the unlocking rod is inserted into the lock cylinder, the unlocking sleeve is locked with the lock cylinder, in the process, the acting force between the unlocking rod and the lock cylinder pushes the push rod to compress the elasticity of the elastic connection of the push rod and the motor, so that the limiting rod is clamped on the wall of the locking groove, the push rod cannot rotate, the locking piece is always propped against the inner wall of the unlocking sleeve, the unlocking sleeve and the unlocking rod cannot rotate relatively, and the unlocking rod cannot rotate under double locking of the lock cylinder and the unlocking sleeve, and the lock cylinder cannot be unlocked;

when the key unlocking mechanism and the lock cylinder to be unlocked are authorized correctly, the motor operates to drive the push rod to rotate, so that the motor stops operating after the limit rod enters the guide groove from the locking groove, then the unlocking rod is inserted into the lock cylinder, the unlocking sleeve is locked with the lock cylinder, in the process, the acting force between the unlocking rod and the lock cylinder pushes the push rod to compress the elasticity of the elastic connection between the push rod and the motor, and the elastic force moves towards the motor in a rotating mode under the action of the guide groove, so that the first end of the push rod is separated from the locking piece, the bottom end of the locking piece is pressed against the outer wall of the second end of the push rod, the top end of the locking piece is separated from the inner wall of the unlocking sleeve, and relative rotation can be generated between the unlocking sleeve and the unlocking rod, so that the aim of unlocking the lock cylinder is achieved through rotation of the unlocking rod is achieved;

therefore, the key unlocking mechanism only needs to control the motor to rotate for a certain angle after obtaining the correct authorization, and the push rod needs to be electrified to operate in the process of feeding the push rod into the guide groove from the locking groove, so that the power consumption degree of the lockset can be effectively reduced, and the service life of the lockset is prolonged.

Drawings

FIG. 1 is a perspective view of a key unlocking mechanism of the present utility model;

FIG. 2 is an exploded view of the key unlocking mechanism of the present utility model;

FIG. 3 is a cross-sectional view of the key unlocking mechanism of the present utility model;

FIG. 4 is a schematic illustration of the motor and unlocking lever connection of the present utility model;

fig. 5 is a perspective view of the unlocking lever of the present utility model;

FIG. 6 is a schematic view of the unlocking lever of the present utility model;

FIG. 7 is a cross-sectional view of the pushrod of the present utility model;

FIG. 8 is a perspective view of the unlocking sleeve of the present utility model;

FIG. 9 is a schematic view of the lock of the present utility model;

FIG. 10 is a cross-sectional view of the lock of the present utility model;

FIG. 11 is an exploded view of the lock of the present utility model;

fig. 12 is a schematic diagram of a key authorization process according to the present utility model.

Reference numerals illustrate:

100. a bracket; 101. a cover body; 1011. a first connection plate; 1012. connecting the convex edges; 1013. a second through hole; 102. a mounting groove; 103. a fixing plate; 104. a connecting screw; 105. a second connecting plate;

200. a motor; 201. a drive shaft; 202. a motor wiring terminal; 203. a return spring;

300. a push rod; 301. a first end; 302. a second end; 303. a connection hole; 304. a limit rod;

400. unlocking the rod; 401. a guide groove; 4011. a locking groove; 4012. a locking surface; 4013. locking an included angle; 4014. a guide surface; 402. a first through hole; 403. a first mounting hole; 404. unlocking the lock head; 4041. the first clamping groove; 4042. a first clamping bump; 4043. an arc-shaped groove;

500. unlocking the sleeve; 501. a second mounting hole; 502. the second clamping convex block; 503. the second clamping groove; 504. a limit groove;

600. a lock core; 601. unlocking the hole; 6011. a locking groove; 6012. a clamping block; 603. a chip;

701. an input circuit; 702. a receiving circuit; 703. an output circuit;

800. locking member 800.

Detailed Description

In order that the utility model may be readily understood, a more particular description of specific embodiments thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

As used herein, the terms "first and second …" are used merely to distinguish between names and not to represent a particular number or order unless otherwise specified or defined.

The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items, unless specifically stated or otherwise defined.

The term "fixed" or "connected" as used herein may be directly fixed or connected to an element, or indirectly fixed or connected to an element.

Referring to fig. 1 to 3, the key unlocking mechanism provided in this embodiment includes a bracket 100, a mounting groove 102 is formed in the bracket 100, a motor 200 is embedded in the mounting groove 102, a fixing plate 103 is arranged on the motor 200, which is away from the bracket 100, the fixing plate 103 is fastened and fixed with the motor 200, and a connecting screw 104 is arranged on two sides of the fixing plate 103, the connecting screw 104 passes through the fixing plate 103 and is fastened and fixed with the bracket 100, and the fixing plate 103 is fixed on the bracket 100, so that the motor 200 is fixed in the mounting groove 102.

The driving shaft 201 of the motor 200 is sleeved with a reset spring 203, the mounting groove 102 of the bracket 100 also comprises a push rod 300, one end of the push rod 300 is in transmission connection with the motor 200, and the other end extends out of the bracket 100.

Referring to fig. 6, the pushrod 300 includes a first end 301 and a second end 302, a distance from an outer circumferential wall of the first end 301 to an axis of the pushrod 300 is greater than a distance from an outer circumferential wall of the second end 302 to the axis of the pushrod 300, and a transition step is formed at a junction of the first end 301 and the second end 302.

The first end 301 is provided with a connecting hole 303, the driving shaft 201 of the motor 200 is inserted into the connecting hole 303 and is fixedly connected with the first end 301 of the push rod 300, when the driving shaft 201 of the motor 200 is inserted into the connecting hole 303, the end of the return spring 203 is pressed against the hole wall of the connecting hole 303, so that a return force is generated by compression when the push rod 300 approaches the motor 200, and the push rod 300 is driven to automatically return after the external force of the push rod 300 is removed.

In this embodiment, a bump is preferably disposed on the driving shaft 201 of the motor 200, a through slot for conducting the connecting hole 303 is formed on the outer wall of the first end 301 of the push rod 300, and the motor 200 is in transmission connection with the push rod 300 by extending the bump out of the connecting hole through the through slot.

Of course, the driving shaft 201 of the motor 200 and the push rod 300 in the driving connection of the present embodiment may also be in a snap connection or a limit connection, for example, a mutually limited surface, a mutually limited concave-convex structure, or the like may be provided in the driving shaft 201 and the connecting hole 303 of the motor 200, so long as the driving shaft 201 of the motor 200 can rotate and the push rod 300 can be driven to rotate.

Referring to fig. 4 and 5, the unlocking lever 400 further includes an unlocking lever 400, a first mounting hole 403 is formed in the unlocking lever 400, two guide grooves 401 for conducting the first mounting hole 403 are formed on the outer wall of the unlocking lever 400, the two guide grooves 401 are symmetrically arranged in the center of the axis of the unlocking lever 400, a locking groove 4011 is formed at the end of the guide groove 401, the locking groove 4011 is symmetrically arranged in the center of the axis of the unlocking lever 400, two limiting rods 304 are arranged at the first end 301 of the push rod 300, when the unlocking lever 400 is sleeved on the push rod 300, the push rod 300 extends into the first mounting hole 403, and the end of the limiting rod 304 extends into the locking groove 4011.

A guide surface 4014 is formed on a groove wall of the guide groove 401, and an inclination angle is formed between the guide surface 4014 and an axis of the unlocking lever 400, and is preferably 45 °, so that the guide surface 4014 is inclined from an end close to the bracket 100 to an end away from the bracket 100.

The locking groove 4011 is triangular, the groove wall of the locking groove 4011, which is close to the bracket 100, is connected with the guide surface 4014, the inclination angle of the groove wall is the same as that of the guide surface 4014, the groove wall of the locking groove 4011, which is far away from the bracket 100, is provided with a locking surface 4012, the end of the locking surface 4012 extends into the guide groove 401 along the radial direction of the unlocking lever 400, a locking angle 4013 is formed between the groove wall adjacent to the locking surface 4012 and the locking surface 4012, and the locking angle 4013 is 90 degrees.

At least two first through holes 402 for conducting the first mounting holes 403 are formed in the outer wall of the unlocking lever 400, a locking piece 800 is disposed in the first through holes 402, and the bottom end of the locking piece 800 abuts against the outer peripheral wall of the first end 301 or the second end 302 of the push rod 300.

A unlocking head 404 is disposed at one end of the unlocking lever 400 facing away from the bracket 100, and the unlocking head 404 is inserted into the lock cylinder 600 to unlock or lock the lock cylinder 600.

Referring to fig. 8, an unlocking sleeve 500 is sleeved on the unlocking rod 400, the unlocking sleeve 500 is located between the bracket 100 and the unlocking head 404, a second mounting hole 501 is formed in the unlocking sleeve 500, the unlocking rod 400 passes through the second mounting hole 501 and extends into the mounting groove 102 of the bracket 100, and the unlocking rod 400 is sleeved on the push rod 300.

At least two limiting grooves 504 are formed in the second mounting hole 501 at one end close to the bracket 100, and when the unlocking sleeve 500 is sleeved on the unlocking lever 400, the limiting grooves 504 correspond to the first through holes 402 and are located above the first through holes 402, and a first gap (not shown in the drawings, and the same applies below) is formed between the limiting grooves 504 and the outer peripheral wall of the unlocking lever 400.

A second gap (not shown) is formed between the outer peripheral wall of the second end 302 of the push rod 300 and the inner peripheral wall of the first mounting hole 403, the locking member 800 and the unlocking sleeve 500 form a first state or a second state, and the push rod 300 moves in the first mounting hole 403 to form a first position and a second position with the motor 200;

in the first state, the push rod 300 moves to a second position toward the motor 200 in the first position, compresses the return spring 203, the second end 302 is displaced below the first through hole 402, the bottom end of the locking member 800 abuts against the outer wall of the second end 302, and a movable gap (not shown) is formed between the top end and the inner wall of the limiting groove 504, so as to form an unlocked state, and at this time, the unlocking rod 400 and the unlocking sleeve 500 can rotate relatively;

in the second state, the push rod 300 is reset under the action of the elastic force of the return spring 203, and moves from the second position to the first position toward the unlocking sleeve 500, the first end 301 is displaced to the lower side of the first through hole 402, the bottom end of the locking member 800 abuts against the outer wall of the first end 301, and the top end abuts against the inner wall of the limiting groove 504, so as to form a locking state, and at this time, the unlocking rod 400 and the unlocking sleeve 500 cannot rotate relatively.

The locking member 800 in this embodiment is a steel ball.

The top surface and the bottom surface of the bracket 100 are both provided with second connecting plates 105 extending outwards, and the bracket further comprises a cover body 101 connected with the bracket 100, wherein a first connecting plate 1011 is arranged on the cover body 101, a connecting convex edge 1012 extending towards the direction of the bracket 100 is arranged on the periphery edge of the connecting plate, and the connecting convex edge 1012 and the end part of the second connecting plate 105, which is far away from the bracket 100, are fixedly connected in a screw, a bolt, a pin shaft or the like.

A second through hole 1013 is formed in the cover 101, and when the cover 101 is connected to the bracket 100, the unlocking sleeve 500 and the unlocking rod 400 at most partially pass through the second through hole 1013.

The motor 200 in this embodiment is connected with a motor connection terminal 202 through a connection lead, so as to be connected with a power supply to provide a power source for the operation of the motor 200.

The key unlocking mechanism provided by the embodiment is based on the use principle:

in the initial state, the bottom end of the locking piece 800 is pressed against the outer wall of the first end 301 of the push rod 300, and the top end is pressed against the inner wall of the unlocking sleeve 500.

When the key unlocking mechanism and the lock cylinder 600 to be unlocked are authorized by mistake, the motor 200 does not operate, at this time, the limiting rod 304 of the push rod 300 is still positioned in the locking groove 4011, the unlocking head 404 of the unlocking rod 400 is inserted into the lock cylinder 600, the unlocking sleeve 500 is locked with the lock cylinder 600, in the process, the acting force between the unlocking rod 400 and the lock cylinder 600 pushes the push rod 300 to compress the reset spring 203 elastically connected with the push rod 300 and the motor 200, so that the limiting rod 304 is clamped on the locking included angle 4013 of the locking groove 4011 when the push rod 300 is retreated, the push rod 300 cannot rotate, the locking piece 800 always abuts against the inner wall of the unlocking sleeve 500, the unlocking sleeve 500 cannot rotate relative to the unlocking rod 400, and the unlocking rod 400 cannot rotate under the double locking of the lock cylinder 600 and the unlocking sleeve 500, and the lock cylinder 600 cannot be unlocked;

when the key unlocking mechanism and the lock cylinder 600 to be unlocked are authorized correctly, the motor 200 operates to drive the push rod 300 to rotate, so that the motor 200 stops operating after the limit rod 304 enters the guide groove 401 from the locking groove 4011, then the unlocking head 404 of the unlocking rod 400 is inserted into the lock cylinder 600, the unlocking sleeve 500 is locked with the lock cylinder 600, in the process, the acting force between the unlocking rod 400 and the lock cylinder 600 pushes the push rod 300 to compress the reset spring 203 elastically connected with the push rod 300 and the motor 200, and the reset spring moves in a rotating manner towards the motor 200 under the action of the guide groove 401, so that the first end 301 of the push rod 300 is separated from the locking piece 800, the bottom end of the locking piece 800 is pressed against the outer wall of the second end 302 of the push rod 300, the top end of the locking piece 800 is separated from the inner wall of the unlocking sleeve 500, and relative rotation can be generated between the unlocking sleeve 500 and the unlocking rod 400, and the aim of unlocking the lock cylinder 600 is achieved through rotation of the unlocking rod 400;

when the unlocking lever 400 and the lock cylinder 600 of the key unlocking mechanism are separated, the push rod 300 is rotated and reset under the elastic action of the reset spring 203, so that the limit rod 304 reenters the locking groove 4011, the bottom end of the locking piece 800 is pressed against the first end 301 of the push rod 300 from new, the top is pressed against the groove wall of the limit groove 504 from new, and the unlocking sleeve 500 and the unlocking lever 400 cannot rotate relatively.

Referring to fig. 9 to 11, the present embodiment further provides a lock, including a lock cylinder 600, where an unlocking hole 601 is formed in the lock cylinder 600, the unlocking hole 601 is configured to cooperate with an unlocking lever 400 of the key unlocking mechanism, a chip 603 is disposed at an end of the lock cylinder 600, and a code reading coil (not shown in the drawings, and the same applies below) that is inductively mated with the chip 603 is disposed inside the bracket 100.

The code reading coil is connected with the motor 200 through a control board (not shown, the same applies hereinafter) disposed in the bracket 100, and an induction coil (not shown, the same applies hereinafter) and a I D chip (not shown, the same applies hereinafter) are disposed in the code chip 603, so as to cooperate with the code reading coil to unlock and authorize the key unlocking mechanism.

A plurality of arc grooves 4043 are formed in the outer peripheral wall of the unlocking head 404, and a plurality of balls (not shown) matched with the arc grooves 4043 are arranged in the lock cylinder 600, so that the elastic force of the balls can push the push rod 300 to move when the unlocking head 404 is inserted into the unlocking hole 601.

First clamping groove 4041 and first clamping projection 4042 have been seted up on the periphery wall of lock release 404 be equipped with second clamping groove 503 and second clamping projection 502 on the outer wall of unlock cover 500, work as unlock cover 500 cover is established on the release lever 400, unlock cover 500 deviates from the one end of support 100 is equipped with second clamping groove 503 and second clamping projection 502, just second clamping groove 503 intercommunication first clamping groove 4041 forms wholly, second clamping projection 502 with second clamping projection 502 cooperation forms wholly.

A locking groove 6011 is formed in the unlocking hole 601, when the unlocking head 404 is inserted into the unlocking hole 601, the first clamping protrusion 4042 on the unlocking head 404 passes through the locking groove 6011 and stretches into the unlocking hole 601, and the second clamping protrusion 502 on the unlocking sleeve 500 is clamped into the locking groove 6011.

A clamping block 6012 is arranged in the unlocking hole 601, and when the unlocking head 404 is inserted into the unlocking hole 601, the clamping block 6012 passes through the first clamping groove 4041 on the unlocking head 404 and is clamped with the second clamping groove 503 on the unlocking sleeve 500.

When the lock provided in this embodiment is used, the key unlocking mechanism is close to the lock core 600, the code reading coil in the bracket 100 reads the information of the code sheet 603, when the identity information of the I D chip in the code sheet 603 is correct, the MCU (micro control unit) on the control board in the bracket 100 determines that the authorization is correct according to the identity information, and the motor 200 is controlled to operate to drive the push rod 300 to rotate, so that the limit rod 304 on the push rod 300 enters the guide groove 401 from the locking groove 4011, thereby enabling the unlocking rod 400 and the unlocking sleeve 500 to rotate relatively, and the unlocking rod 400 rotates to drive the lock core 600 to rotate, so as to unlock the lock core 600; when the identity information of the I D chip in the chip 603 is wrong, the MCU (micro control unit) on the control board in the bracket 100 determines that the authorization is wrong according to the identity information, and the motor 200 does not operate, so that the unlocking lever 400 and the unlocking sleeve 500 cannot rotate relatively, the unlocking lever 400 cannot rotate to drive the lock cylinder 600 to rotate, and thus unlocking of the lock cylinder 600 cannot be achieved.

Referring to fig. 12, the present embodiment further provides an unlocking circuit for the lock cylinder 600, which includes an input circuit 701, a receiving circuit 702, and an output circuit 703, where an input end of the input circuit 701 is communicatively connected to the chip 603, an output end of the input circuit 702 is connected to an input end of the receiving circuit 702, an output end of the receiving circuit 702 is connected to an input end of the output circuit 703, and an output end of the output circuit 703 is connected to the motor 200.

The input circuit 701 is the code reading coil, the receiving circuit 702 is the control board, and the output circuit 703 is the MCU of the control board.

When in use, the code reading coil reads the information of the code sheet 603, when the code reading is correct, a code reading correct signal T is input to the control board, the MCU of the control board inputs a high-level signal 1 (unlocking signal) to the motor 200, and the motor 200 operates to send the limit rod 304 of the push rod 300 into the guide groove 401; when the code reading is wrong, the MCU of the control board, which inputs the code reading error signal "F" to the control board, inputs the low level signal "0" (latch signal) to the motor 200, and the motor 200 does not operate.

According to the key unlocking mechanism and the lock, when the key unlocking mechanism is used, the motor 200 only needs to operate to drive the push rod 300 to rotate a certain angle when receiving a high-level signal '1', so that the limit rod 304 on the push rod 300 enters the guide groove 401 from the locking groove 4011, the condition that the limit rod 304 is blocked on the locking included angle 4013 when the unlocking rod 400 is inserted into the lock cylinder 600 and cannot enter the guide groove 401 is avoided, the operation can be stopped, and the rotation speed of the direct-current non-deceleration motor 200 in the market can reach 2500Rad/mi at least, the rotation of the motor 200 in the guide groove 401 is formed in the process of entering the limit rod 304 from the locking groove 4011, the power-on time is extremely short, long-time power energy is not generated to maintain the rotating load of the push rod 300, the power consumption degree of the key can be reduced, and the service life of the key is prolonged.

The above examples are also not an exhaustive list based on the utility model, and there may be a number of other embodiments not listed. Any substitutions and modifications made without departing from the spirit of the utility model are within the scope of the utility model.

Claims (10)

1. The key unlocking mechanism is characterized by comprising a bracket, wherein one end of the bracket is provided with a motor, a driving shaft of the motor stretches into the bracket, the other end of the bracket is provided with a push rod, the push rod comprises a first end and a second end, the distance from the peripheral wall of the first end to the axis of the push rod is larger than the distance from the peripheral wall of the second end to the axis of the push rod, the first end at least partially stretches into the bracket, and the first end is sleeved outside a motor shaft of the motor and is elastically connected with the motor;

an unlocking rod is sleeved outside the push rod, an unlocking sleeve is sleeved outside the unlocking rod, at least two locking pieces are arranged on the unlocking rod, the bottom ends of the locking pieces extend into the unlocking rod to be propped against the first end, the top ends of the locking pieces are propped against the inner wall of the unlocking sleeve, or the bottom ends of the locking pieces extend into the unlocking rod to be propped against the second end, and a movable gap is reserved between the top ends of the locking pieces and the inner wall of the unlocking sleeve;

two guide grooves are formed in the unlocking rod, locking grooves are formed in the end portions of the guide grooves, the guide grooves are symmetrical in center with the axis of the unlocking rod, two limiting rods are arranged on the first end, and the end portions of the limiting rods extend into the locking grooves.

2. The key unlocking mechanism according to claim 1, wherein a first mounting hole is formed in the unlocking rod, the guide groove is communicated with the first mounting hole, the second end of the push rod and the first end extend into the first mounting hole, a second mounting hole is formed in the unlocking sleeve, and the end portion of the unlocking rod extends into the bracket through the second mounting hole.

3. The key unlocking mechanism according to claim 2, wherein at least two first through holes are formed in the outer wall of the unlocking lever, the first through holes are communicated with the first mounting holes, a limit groove is formed in one end, close to the bracket, of the second mounting holes, a first gap is formed between the outer peripheral wall of the unlocking lever and the inner peripheral wall of the limit groove, the first through holes are located below the limit groove, the locking piece is arranged in the first through holes, and the bottom end of the locking piece extends into the first mounting holes.

4. The key unlocking mechanism as set forth in claim 3, wherein a connecting hole is provided at the first end of the push rod, the driving shaft of the motor extends into the connecting hole at least partially, the motor shaft of the motor is engaged with the connecting hole in a clamping manner, a restoring spring is sleeved on the driving shaft of the motor, and the end of the restoring spring is pressed against the wall of the connecting hole.

5. The key unlocking mechanism according to claim 4, wherein a second gap is formed between an outer peripheral wall of the second end and an inner peripheral wall of the first mounting hole, the locking piece and the unlocking sleeve form a first state or a second state, and the push rod moves in the first mounting hole to form a first position and a second position with the motor;

in the first state, the push rod moves to a second position in the motor direction at a first position, the reset spring is compressed, the second end is displaced below the first through hole, the bottom end of the locking piece is abutted against the outer wall of the second end, and the movable gap is formed between the top end and the inner wall of the limiting groove, so that an unlocking state is formed;

under the second state, the push rod is reset under the action of the elastic force of the reset spring, the push rod moves to the first position from the second position to the unlocking sleeve direction, the second end is displaced to the lower part of the first through hole, the bottom end of the locking piece is propped against the outer wall of the first end, and the top end of the locking piece is propped against the inner wall of the limiting groove to form a locking state.

6. A key unlocking mechanism according to any one of claims 1 to 3, wherein a guide surface is formed on a wall of the guide groove, an inclined angle is formed between the guide surface and an axis of the unlocking lever, the guide surface is inclined from one end against the bracket to one end away from the bracket, the locking groove is triangular, a locking surface is formed on an inner wall of the locking groove on one side against the bracket, and an end of the locking surface extends into the guide groove in a radial direction of the unlocking lever.

7. A key unlocking mechanism according to any one of claims 1 to 3, wherein an unlocking head is arranged at the end part of the unlocking rod, which is away from the bracket, at least two first grooves are formed in the unlocking head, the first grooves are arranged in an annular array along the axis of the unlocking rod, and the locking piece is in sliding fit with the first grooves.

8. A key unlocking mechanism according to any one of claims 1 to 3, wherein a cover body is sleeved on the unlocking sleeve, a first connecting plate is arranged at one end of the cover body, which is close to the bracket, a connecting convex edge extending towards the direction of the bracket is arranged on the peripheral edge of the first connecting plate, a second connecting plate is arranged on the bracket, and the connecting convex edge is sleeved on the peripheral wall of the second connecting plate.

9. A key unlocking mechanism according to any one of claims 1 to 3, wherein a mounting groove is formed in the bracket, the motor is arranged in the mounting groove, a fixing plate is sleeved at one end of the motor, which is away from the bracket, and the fixing plate is in threaded fit with the bracket; the end part of the unlocking rod stretches into the mounting groove.

10. The lockset is characterized by comprising a lock core, wherein an unlocking hole for inserting an unlocking rod of the key unlocking mechanism of any one of claims 1 to 9 is formed in the lock core, a code chip is fixedly arranged at the end part of the lock core, a code reading coil and a control board are fixedly arranged in the bracket, the code reading coil is connected with the control board, and the code reading coil is in inductive fit with the code chip.

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