CN109750905B

CN109750905B - Lockset and bicycle

Info

Publication number: CN109750905B
Application number: CN201711070093.5A
Authority: CN
Inventors: 邓秀红
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2017-11-03
Filing date: 2017-11-03
Publication date: 2021-11-12
Anticipated expiration: 2037-11-03
Also published as: CN109750905A

Abstract

The invention relates to a lockset, which comprises a shell provided with an opening, a lock pin, a lock tongue resetting piece and an electromagnet, wherein the lock pin, the lock tongue resetting piece and the electromagnet are arranged in the shell; in the process that the push rod moves from the idle position to the working position, the push rod pushes the lock tongue to move from the locking position to the releasing position against the elastic force of the lock tongue reset piece, so that the lock pin can return from the locking position to the unlocking position, and when the push rod is located at the working position, the push rod keeps the lock tongue at the releasing position. Through the technical scheme, the lockset provided by the disclosure can realize the unlocking and locking functions through a simple and reliable structure, and is low in cost.

Description

Lockset and bicycle

Technical Field

The disclosure relates to the technical field of locks, in particular to a lock and a bicycle.

Background

Along with the rapid development of mobile internet, internet sharing bicycle takes place of fortune, and stake bicycle is started to replace by stake bicycle more convenient, in order to prevent burglary and to be taken into account by the user, and current sharing bicycle all is equipped with the intelligence lock.

The unlocking action and the locking action of the intelligent lock are usually realized by driving a bolt to move through a motor. Generally, an intelligent lock locks a vehicle through a lock pin, a gear groove is arranged on the lock pin, a lock tongue can be inserted into the gear groove to lock the lock pin at a locking position under the driving of a motor, the lock tongue is withdrawn from the gear groove to release the lock pin, and the lock pin is withdrawn to an unlocking position under the driving of a spring. Specifically, the motor passes through gear drive, converts the rotation of motor shaft into the linear motion of spring bolt, and when the lockpin was pulled to the closed lock position by external force, motor drive spring bolt stretched out forward and stopped rotating when touching first travel switch, and the spring bolt inserts in the fender groove of lockpin, causes the lockpin to be locked in closed lock position, and intelligent lock locking this moment. When the intelligent lock is unlocked, the motor drives the lock tongue to withdraw from the blocking groove until the motor stops rotating when the motor touches the second travel switch, the lock tongue completely withdraws from the blocking groove of the lock pin, the lock pin is pulled back to the unlocking position through the spring, and the intelligent lock is unlocked at the moment.

However, in order to be able to drive the bolt, in addition to the motor which requires a relatively large amount of power, the motor is also required to have a gear box; and because the friction that receives in the spring bolt motion process is great, still need two travel switch control spring bolt's motion position in addition.

Therefore, the existing bicycle intelligent lock is high in cost and complex in structure.

Disclosure of Invention

The purpose of this disclosure is to provide a lock, this lock can realize the function of unblock locking through simple and reliable structure, low cost moreover.

In order to achieve the above object, the present disclosure provides a lock device, including a housing provided with an opening, and a lock pin, a lock tongue resetting member, and an electromagnet, which are disposed in the housing, wherein the lock pin can extend from the housing to a locked position through the opening and retract to an unlocked position into the housing, a groove is formed on the lock pin, the lock tongue is engaged with the lock tongue, the lock tongue can move between a locked position and a released position, the lock tongue resetting member provides an elastic force for the lock tongue to move toward the locked position, in the locked position, the lock tongue is located in the groove to lock the lock pin, in the released position, the lock tongue is withdrawn from the groove to allow the lock pin to move, the electromagnet includes a housing and a push rod movably disposed in the housing, the push rod can extend from the housing to an operating position and retract to a rest position into the housing, when the lock pin is positioned at the locking position, the push rod is positioned at the idle position, and the lock tongue is kept at the locking position through the lock tongue resetting piece; during the process that the push rod moves from the idle position to the working position, the push rod pushes the lock bolt to move from the locking position to the releasing position against the elastic force of the lock bolt resetting piece, so that the lock pin can return from the locking position to the unlocking position, and when the push rod is located at the working position, the push rod keeps the lock bolt at the releasing position.

Optionally, a transmission rod is disposed in the housing, a middle portion of the transmission rod is connected to the housing through a hinge point a to form a lever structure, the hinge point a divides the transmission rod into a driving portion and an actuating portion, a distal end of the actuating portion is bent to form the latch, one end of the latch resetting member is connected to the actuating portion on one side of the transmission rod in the length direction, the other end of the latch resetting member is connected to the housing, the push rod is close to the other side of the transmission rod in the length direction and acts on the distal end of the driving portion, and the transmission rod rotates around the hinge point a in a first direction in the process of moving the latch from the release position to the latch position.

Optionally, the size of the power arm of the lever structure is larger than the size of the resistance arm.

Alternatively, the electromagnet is a holding electromagnet including a bobbin provided in the housing, a coil wound on the bobbin, a permanent magnet provided in the bobbin and located at one end, a movable iron core provided in the bobbin and capable of sliding in an axial direction of the bobbin, one end of the push rod is always located in the housing and connected to the movable iron core, and the other end protrudes from the housing to act on a tip end of the driving portion; when the coil is electrified, the movable iron core and the permanent magnet mutually repel each other to push the push rod out towards the direction outside the shell and keep the push rod at the working position; when the coil is powered off, the permanent magnet sucks and holds the movable iron core in the shell, and the movable iron core drives the push rod to retract and hold the push rod at the idle position.

Optionally, the lock includes a controller including a control unit connected in a closed loop with the power source and the electromagnet, the control unit controlling the electromagnet to be energized in response to a received unlock signal.

Optionally, the controller includes a wireless mobile communication unit interconnected with the control unit, and the unlocking signal is transmitted by the wireless mobile communication unit.

Optionally, the lock includes a detection device connected to the controller for sending a locking signal to the controller when the bolt is inserted into the recess.

Alternatively, the detection device includes a sensor fixed in the housing and a signal rod movably connected to the housing in the housing, one end of the signal rod is always in contact with the driving portion, and the other end of the signal rod faces the sensor, the driving portion drives the signal rod to approach the sensor when the transmission rod rotates in the first direction, the signal rod is far away from the sensor when the transmission rod rotates in a second direction opposite to the first direction, and the signal rod triggers the sensor to send out the locking signal when the latch bolt is located in the locking position.

Optionally, the control unit controls the electromagnet to be powered on for 10-20 seconds and then automatically powered off.

Optionally, the lock further includes a lock pin reset disposed in the housing, the lock pin reset being coupled between the lock pin and the housing for providing the lock pin with a spring force to move toward the unlocked position.

Optionally, the lock pin is provided with a lock pin handle, and the housing is formed with a slide passage hole for guiding the lock pin handle to slide.

Optionally, the housing has a horseshoe-shaped structure including a body portion and a lock housing portion, the electromagnet is disposed in the body portion, the lock housing portion includes a first side arm and a second side arm extending from two sides of the body portion, the first side arm and the second side arm enclose a C-shaped locking opening, a C-shaped locking slot is disposed in the lock housing portion, the C-shaped locking slot extends in the first side arm and the second side arm, the locking pin is configured in a C-shaped ring structure and is received in the C-shaped locking slot, and the opening is located at an end of the first side arm or the second side arm and is communicated with the C-shaped locking slot.

Through the technical scheme, when a user needs to unlock the lock in a locked state (namely the lock pin is located at the locking position and the lock tongue is kept at the locking position by the lock tongue resetting piece), the push rod extends out of the shell and pushes the lock tongue to withdraw from the groove by controlling the power-on condition of the electromagnet, at the moment, the stop of the lock tongue is lost, and the lock pin can withdraw to the unlocking position in the shell, so that the unlocking operation is realized; when a user needs to lock, the lock pin is moved to the locking position, the lock tongue is inserted into the groove under the action of the lock tongue resetting piece, so that the lock pin is locked at the locking position, and the lock is in a locking state. Therefore, in the lock provided by the present disclosure, on one hand, the electromagnet is used as a driving mechanism of the lock tongue, which can significantly reduce the cost compared with a mode of using the motor as a driving mechanism, and on the other hand, the push rod in the electromagnet can keep the lock tongue at the release position when in the working position, so that a forming switch for detecting the position of the lock tongue is omitted, the cost is further reduced, the structure of the lock is simplified, and the lock is more reliable compared with the motor due to the characteristics of the electromagnet.

On the basis of the technical scheme, the present disclosure still provides a bicycle, including automobile body and wheel, the bicycle still includes foretell tool to lock, wherein, the casing is installed in the automobile body and the installation is: when the lock pin is located at the locking position, the free rotation of the wheel is limited, and when the lock pin is located at the unlocking position, the free rotation of the wheel is allowed, so that the anti-theft function of the bicycle is realized.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic plan view of a lock provided in accordance with an embodiment of the present disclosure, with a locking pin in a locked position;

FIG. 2 is a schematic plan view of a lock provided in accordance with an embodiment of the present disclosure, with the locking pin in an unlocked position;

FIG. 3 is a block diagram of a controller in a lockset provided in accordance with an embodiment of the present disclosure;

fig. 4 is a schematic block diagram of connection between a controller and a sensor in a lock provided according to an embodiment of the present disclosure.

Description of the reference numerals

1-shell, 11-body part, 12-lock shell part, 121-first side arm, 122-second side arm, 123-C lock opening, 124-C lock groove, 13-opening, 14-slide hole, 2-lock pin, 21-groove, 3-lock pin reset piece, 4-electromagnet, 41-push rod, 5-power supply, 6-transmission rod, 61-driving part, 62-actuating part, 63-lock tongue, 7-lock tongue reset piece, 8-controller, 81-control unit, 82-wireless mobile communication unit, 91-sensor, 92-signal rod.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, use of the terms of orientation such as "upper, lower, left, and right" generally refer to upper, lower, left, and right in the corresponding drawings, and "inner and outer" refer to inner and outer relative to the contour of the respective members themselves. Those skilled in the art will appreciate that the foregoing directional terms are used only to explain and illustrate the present disclosure, and are not limiting.

According to the specific embodiment of the present disclosure, a lock is provided, and fig. 1 and 2 show an embodiment of the lock, and referring to fig. 1 and 2, the lock includes a housing 1 provided with an opening 13, and a lock pin 2, a lock tongue 63, a lock tongue return member 7 (such as a spring), and an electromagnet 4, which are arranged in the housing 1, the lock pin 2 can extend from the housing 1 to a locked position and retract to an unlocked position in the housing 1 through the opening 13, a groove 21 matched with the lock tongue 63 is formed on the lock pin 2, the lock tongue 63 can move between a locked position and a released position, the lock tongue return member 7 provides an elastic force for the lock tongue 63 to move towards the locked position, in the locked position, the lock tongue 63 is located in the groove 21 to lock the lock pin 2, in the released position, the bolt 63 withdraws from the recess 21 to allow the lock pin 2 to move, the electromagnet 4 comprises a housing and a push rod 41 movably arranged in the housing, the push rod 41 can extend out of the housing to a working position and retract back into the housing to a rest position by controlling the electrification of the electromagnet 4, when the lock pin 2 is in the locking position, the push rod 41 is in the rest position, and the bolt 63 is kept in the locking position by the bolt resetting piece 7; during the process of moving the push rod 41 from the rest position to the working position, the push rod 41 pushes the lock tongue 63 to move from the locking position to the releasing position against the elastic force of the lock tongue returning member 7, so that the lock pin 2 can return from the locking position to the unlocking position, and when the push rod 41 is in the working position, the push rod 41 holds the lock tongue 63 in the releasing position. In the specific embodiment provided by the present disclosure, in order to enable the electromagnet 4 to work normally, the lock further includes a power supply 5 for supplying power to the electromagnet 4, the power supply 5 may be disposed in the housing 1, and optionally, the power supply 5 may be a rechargeable battery.

Through the technical scheme, when a user needs to unlock the lock in a locking state (namely, the lock pin 2 is located at a locking position and the lock tongue 63 is kept at the locking position by the lock tongue resetting piece 7, as shown in fig. 1), the push rod 41 extends out of the shell and pushes the lock tongue 63 to withdraw from the groove 21 by controlling the power-on condition of the electromagnet 4, at the moment, the stop of the lock tongue 63 is lost, and the lock pin 2 can withdraw to the unlocking position in the shell 1, so that the unlocking operation is realized; when the user needs to lock, the lock pin 2 is moved to the locking position, and the bolt 63 is inserted into the groove 21 under the action of the bolt resetting piece 7 to lock the lock pin 2 in the locking position, so that the lock is in the locking state, which is shown in fig. 2. Therefore, in the lock provided by the present disclosure, on the one hand, the electromagnet 4 is used as the driving mechanism of the latch 63, which can significantly reduce the cost compared to the way of using the motor as the driving mechanism, and on the other hand, the push rod 41 in the electromagnet 4 can keep the latch 63 at the release position when in the working position, which eliminates the formation of a switch for detecting the latch position, further reduces the cost, simplifies the structure of the lock, and is more reliable compared to the motor due to the characteristics of the electromagnet itself.

In the embodiments provided by the present disclosure, in order to optimize the use of the limited space within the housing 1, a transmission mechanism may be provided between the electromagnet 4 and the latch 63. Alternatively, a transmission rod 6 is disposed in the housing 1, a middle portion of the transmission rod 6 is connected with the housing 1 through a hinge point a to form a lever structure, the hinge point a divides the transmission rod 6 into a driving portion 61 and an actuating portion 62, a distal end of the actuating portion 62 is bent to form the latch 63, one end of the latch resetting member 7 is connected to the actuating portion 62 and the other end is connected to the housing 1 at one side of a length direction of the transmission rod 6, the push rod 41 is close to the other side of the length direction of the transmission rod 6 and acts on a distal end of the driving portion 61 (i.e., an end far from the hinge point a), and during the movement of the latch 63 from the release position (the latch 63 is in the release position in fig. 2) to the latch position (the latch 63 is in the latch position in fig. 1), the transmission rod 6 rotates around the hinge point a in a first direction (corresponding to a counterclockwise direction in fig. 1 and 2) .

As can be seen with reference to fig. 1 and 2, on the one hand, the bolt return 7 acts on the actuating part 62 to move the driving rod 6 around the hinge point in said first direction, the bolt 63 being able to move from the release position to the blocking position, in which case, as long as the recess 21 is not aligned with the bolt 63, the bolt 63 cannot be inserted into the recess 21, the movement of the lock pin 2 is not restricted, and once the lock pin 2 has moved into the recess 21 aligned with the bolt 63, the bolt 63 is inserted into the recess 21 under the action of the bolt return 7 to block the lock pin 2, with the lock pin 2 in the blocking position. On the other hand, the electromagnet 4 acts on the driving portion 61 through the push rod 41 to rotate the transmission rod 6 around the hinge point a in a second direction opposite to the first direction, the latch tongue 63 can move from the latched position to the released position to release the lock pin 2, and the lock pin 2 moves from the latched position to the unlatched position by an external force (e.g., an elastic force of a lock pin reset member 3 described later). In both respects, if the bolt 63 is withdrawn from the recess 21 by the push rod 41, the unlocking operation can be achieved if the detent 2 is moved so that the recess 21 is no longer aligned with the bolt 63, and the electromagnet 4 no longer needs to be operated, which results in a substantial saving of electrical energy.

In addition, in order to save labor, i.e. to enable the push rod 41 to push the transmission rod 6 with a smaller pushing force and hold the bolt 63 in the release position, the size of the power arm of the lever structure is larger than that of the resistance arm, which is beneficial for the lock to adopt an electromagnet with smaller power, and further reduces the cost.

In the specific embodiment provided by the present disclosure, the electromagnet 4 may be configured in any suitable manner, for example, the electromagnet 4 is a holding electromagnet 4, and in addition to the above-mentioned housing and the push rod 41, the holding electromagnet 4 further includes a bobbin disposed in the housing, a coil wound on the bobbin, a permanent magnet disposed in the bobbin and located at one end, and a movable iron core disposed in the bobbin and capable of sliding in the axial direction of the bobbin, one end of the push rod 41 is always located in the housing and connected with the movable iron core, and the other end protrudes from the housing to act on the end of the driving portion 61; when the coil is electrified, the movable iron core and the permanent magnet mutually repel each other to push the push rod 41 out of the shell and keep the push rod 41 at the working position; when the coil is de-energized, the permanent magnet sucks and holds the plunger in the housing, and the plunger 41 is driven by the plunger to retract and hold the plunger in the rest position, specifically, the electromagnet 4 is a one-way holding electromagnet 4, that is, when the coil is not energized, the plunger 41 can only be held in the rest position by the permanent magnet. In other embodiments provided in the present disclosure, the electromagnet 4 may be a bidirectional holding electromagnet, that is: under the condition that the electromagnet is powered on in the positive direction, the push rod 41 extends out of the shell to a working position, and is kept at the working position through the permanent magnet after power failure; under the condition that the electromagnet is electrified reversely, the push rod retracts to the idle position towards the shell, and after the power failure, the push rod is kept at the idle position through the permanent magnet. In this regard, the present disclosure is not particularly limited.

In the specific embodiment provided by the present disclosure, the lock may include a controller 8, the controller 8 includes a control unit 81 connected to the power source 5 and the electromagnet 4 to form a closed loop, and the control unit 81 controls the electromagnet 4 to be energized according to the received unlocking signal.

Wherein the controller 8 may include a wireless mobile communication unit 82 interconnected with the control unit 81, and referring to fig. 3, the unlocking signal is transmitted by the wireless mobile communication unit 82. The user can use the mobile terminal to scan the corresponding two-dimensional code and send an unlocking signal, the wireless mobile communication unit 82 sends the unlocking signal to the control unit 81 according to the unlocking signal, the control unit 81 controls the electromagnet 4 to be electrified, and then the push rod 41 actuates the lock tongue 63 to move away from the locking position. In order to ensure that the lock pin 2 has enough time to move away from the locking position, the control unit can control the electromagnet 4 to be powered on for 10-20 seconds and then automatically powered off.

In addition, in order to determine that the lock is in the locked state, the lock comprises a detection device connected to the controller 8, the detection device is used for sending a locking signal to the controller 8 when the bolt 63 is inserted into the groove 21, and the controller 8 can inform a user that the lock is locked in sound and/or light mode.

In the specific embodiment provided by the present disclosure, referring to fig. 1 and 2, the detecting device includes a sensor 91 fixed in the housing 1 and a signal rod 92 movably connected to the housing 1 in the housing 1, wherein the sensor 91 is connected to the controller 8, as shown in fig. 4, one end of the signal rod 92 is always in contact with the driving portion 61, and the other end of the signal rod 92 faces the sensor 91, when the transmission rod 6 rotates in the first direction, the driving portion 61 drives the signal rod 92 to approach the sensor 91, when the transmission rod 6 rotates in the second direction opposite to the first direction, the signal rod 92 is away from the sensor 91, and when the latch 63 is in the latch position, the signal rod 92 triggers the sensor 91 to send out the latch signal.

Wherein, the lockset can comprise a lock pin resetting piece 3 arranged in the shell 1, the lock pin resetting piece 3 is connected between the lock pin 2 and the shell 1 and is used for providing the lock pin 2 with elastic force moving towards the unlocking position, so that the lock pin 2 can be instantly and automatically moved towards the unlocking position under the condition that the electromagnet 4 is electrified and the lock bolt 63 is moved away from the locking position by the pushing of the push rod 41. In this case, the user only needs to move the lock pin 2 from the unlock position to the lock close position at the time of locking.

In order to facilitate the user to move the lock pin 2, a lock pin handle may be disposed on the lock pin 2, and a slide hole 14 for guiding the lock pin handle to slide may be formed on the housing 1.

The lock provided by the present disclosure may be used in any suitable application, for example, but not limited to, as a bicycle lock, in which case the housing 1 has a horseshoe-shaped structure, as shown in fig. 1 and 2, the housing 1 includes a body portion 11 and a lock housing portion 12, the power source 5 and the electromagnet 4 are disposed in the body portion 11, the lock housing portion 12 includes a first side arm 121 and a second side arm 122 extending from both sides of the body portion 11, the first and second side arms enclose a C-shaped locking notch 123 in which a wheel is located, a C-shaped locking slot 124 is disposed in the lock housing portion 12, the C-shaped locking slot 124 extends in the first and

second side arms

121 and 122, the lock pin 2 is configured in a C-shaped ring structure and is received in the C-shaped locking slot 124, the opening 13 is located in the second side arm 122 (in further embodiments, or first side arm 121) and communicates with the C-lock slot 124, and the chute opening 14 may be correspondingly located in the second side arm 122 (or first side arm 121 in alternative embodiments).

Therefore, on the basis of the above technical solution, the present disclosure further provides a bicycle, including a body and wheels, wherein the bicycle further includes the lock provided by the present disclosure, and the housing 1 is mounted to the body and mounted to: when the lock pin 2 is located at the locking position, the free rotation of the wheel is limited, and when the lock pin 2 is located at the unlocking position, the free rotation of the wheel is allowed, so that the anti-theft function is realized.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A lock, characterized in that the lock comprises a shell (1) provided with an opening (13) and a lock pin (2), a lock tongue (63), a lock tongue reset piece (7) and an electromagnet (4) which are arranged in the shell (1), the lock pin (2) can extend out of the shell (1) to a locking position and retract to the shell (1) to an unlocking position through the opening (13), a groove (21) matched with the lock tongue (63) is formed on the lock pin (2), the lock tongue (63) can move between a locking position and a releasing position, the lock tongue reset piece (7) provides the lock tongue (63) with elastic force moving towards the locking position, in the locking position, the lock tongue (63) is positioned in the groove (21) to lock the lock pin (2), and in the releasing position, the lock tongue (63) retracts from the groove (21), to allow the locking pin (2) to move, the electromagnet (4) comprising a housing and a push rod (41) movably arranged in the housing, the push rod (41) being capable of being extended from the housing into a working position and retracted into the housing into a rest position,

when the lock pin (2) is located at the locking position, the push rod (41) is located at the idle position, and the lock tongue (63) is kept at the locking position through the lock tongue resetting piece (7); during the process that the push rod (41) moves from the idle position to the working position, the push rod (41) pushes the lock bolt (63) to move from the locking position to the releasing position against the elastic force of the lock bolt resetting piece (7) so that the lock pin (2) can return from the locking position to the unlocking position, and when the push rod (41) is located at the working position, the push rod (41) keeps the lock bolt (63) at the releasing position;

a transmission rod (6) is arranged in the shell (1), the middle part of the transmission rod (6) is connected with the shell (1) through a hinge point A to form a lever structure, the hinge point A divides the transmission rod (6) into a driving part (61) and an actuating part (62), the tail end of the actuating part (62) is bent to form the bolt (63), one end of a bolt resetting piece (7) is connected with the actuating part (62) at one side of the length direction of the transmission rod (6), the other end of the bolt resetting piece is connected with the shell (1), the push rod (41) is close to the other side of the length direction of the transmission rod (6) and acts on the tail end of the driving part (61), and in the process that the bolt (63) moves from the releasing position to the locking position, the transmission rod (6) rotates around the hinge point A along a first direction, during the movement of the bolt (63) from the locking position to the release position, the transmission lever (6) rotates about the hinge point A in a second direction opposite to the first direction,

the lockset also comprises a lock pin resetting piece (3) arranged in the shell (1), wherein the lock pin resetting piece (3) is connected between the lock pin (2) and the shell (1) and is used for providing elastic force for the lock pin (2) to move towards the unlocking position;

the shell (1) is configured with a C-shaped locking groove (124), the lock pin (2) is configured into a C-shaped ring structure and is accommodated in the C-shaped locking groove (124), and the opening (13) is communicated with the C-shaped locking groove (124);

an included angle between the moving direction of the tail end part of the lock tongue (63) located in the groove (21) when the lock tongue (63) moves from the locking position to the releasing position and the moving direction of the lock pin (2) located in the groove (21) when the lock tongue moves from the locking position to the unlocking position is an acute angle, so that the lock pin resetting piece (3) and the electromagnet (4) can jointly provide power for the transmission rod (6) to overcome the elastic force of the lock tongue resetting piece (7) and rotate around the hinge point A in a second direction in the process that the lock tongue (63) moves from the locking position to the releasing position.

2. The lock according to claim 1, wherein the lever structure has a power arm with a dimension greater than a resistance arm.

3. The lock according to claim 1, characterized in that the electromagnet (4) is a holding electromagnet comprising a bobbin arranged in the housing, a coil wound on the bobbin, a permanent magnet arranged in the bobbin and at one end, a movable iron core arranged in the bobbin and slidable in the axial direction of the bobbin, the push rod (41) being always at one end in the housing and connected to the movable iron core and at the other end protruding from the housing to act on the end of the driving portion (61);

when the coil is electrified, the movable iron core and the permanent magnet mutually repel each other to push the push rod (41) out of the shell and keep the push rod (41) at the working position; when the coil is powered off, the permanent magnet sucks the movable iron core into the shell and keeps the movable iron core in the shell, and the movable iron core drives the push rod (41) to retract and keep the push rod at the idle position.

4. The lock according to claim 1, characterized in that it comprises a controller (8), the controller (8) comprising a control unit (81) connected in a closed circuit with the power source (5) and the electromagnet (4), the control unit (81) controlling the electromagnet (4) to be energized in response to the received unlocking signal.

5. The lock according to claim 4, characterized in that said controller (8) comprises a wireless mobile communication unit (82) interconnected with said control unit (81), said unlocking signal being emitted by said wireless mobile communication unit (82).

6. The lock according to claim 4, characterized in that it comprises detection means connected to said controller (8) for sending a locking signal to said controller (8) when said bolt (63) is inserted in said recess (21).

7. The lock according to claim 6, characterized in that said detection means comprise a sensor (91) fixed in said housing (1) and a signal lever (92) movably connected to said housing (1) in said housing (1), said signal lever (92) having one end always in contact with said actuation portion (61) and the other end facing said sensor (91), said actuation portion (61) driving said signal lever (92) close to said sensor (91) when said transmission lever (6) rotates about said first direction, said signal lever (92) moving away from said sensor (91) when said transmission lever (6) rotates about said second direction, said signal lever (92) triggering said sensor (91) to emit said locking signal when said locking tongue (63) is in said locking position.

8. The lock according to claim 4, characterized in that the control unit controls the electromagnet (4) to be powered off automatically after 10-20 seconds.

9. The lock according to claim 1, characterized in that the lock pin (2) is provided with a lock pin handle, and the housing (1) is formed with a chute hole (14) for guiding the lock pin handle to slide.

10. The lock according to claim 1, characterized in that the housing (1) has a horseshoe-shaped structure comprising a body portion (11) and a lock housing portion (12), the electromagnet (4) being arranged in the body portion (11), the lock housing portion (12) comprising a first side arm (121) and a second side arm (122) extending from both sides of the body portion (11), the first and second side arms enclosing a C-shaped locking opening (123), the lock housing portion (12) having the C-shaped locking slot (124) arranged therein, the C-shaped locking slot (124) extending in the first and second side arms (121, 122), the opening (13) being located at an end of the first or second side arm (121, 122).

11. Bicycle comprising a body and wheels, characterized in that it further comprises a lock according to any one of claims 1-10, wherein the housing (1) is mounted to the body and is mounted to: the wheel is restricted from free rotation when the locking pin (2) is in the locked position and is allowed to rotate freely when the locking pin (2) is in the unlocked position.