CN212201675U - Lock head and lock - Google Patents

Abstract

The utility model relates to a tool to lock technical field, concretely relates to tapered end and tool to lock, the tool to lock is including lock box and the tapered end that is equipped with the second spring bolt, the tapered end is including locking the shell and setting up in the first spring bolt and the stop gear of locking the shell, stop gear includes first locating part, second locating part and first elastic component, first elastic component sets up between first locating part and second locating part, first locating part has the extended position that stretches out from the lock shell and the withdrawal position of withdrawal lock shell, the second locating part has primary importance and second position. When the lock head enters the lock box, the first lock tongue retracts into the lock shell under the extrusion of the second lock tongue, the first lock tongue occupies space to prevent the second limiting piece from moving, and the first limiting piece retracts into the lock shell under the extrusion of the side wall of the lock box to enable the first elastic piece to accumulate elastic force; the first lock bolt extends out and is clamped with the second lock bolt when passing over the second lock bolt, the first lock bolt gives up space to allow the second limiting part to move to the second position, and the second limiting part locks the first lock bolt in an extending state.

Description

Lock head and lock

Technical Field

The application relates to a tool to lock technical field particularly, relates to a tapered end and tool to lock.

Background

Locks such as the existing door lock body, the cabinet lock and the like are easy to be unlocked by the technology.

SUMMERY OF THE UTILITY MODEL

The application aims at providing a lock head and a lock so as to solve the problem that the lock is easily opened by the technology in the prior art.

The embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides a lock cylinder, including:

a lock case;

the first bolt is arranged on the lock shell;

the limiting mechanism is arranged on the lock shell and comprises a first limiting piece, a second limiting piece and a first elastic piece, the first elastic piece is arranged between the first limiting piece and the second limiting piece, the first limiting piece is provided with an extending position extending out of the lock shell and a retracting position retracting into the lock shell, and the second limiting piece is provided with a first position and a second position;

when the first lock tongue retracts into the lock shell, the first lock tongue occupies a space to prevent the second limiting member from moving from the first position to the second position, and the first limiting member retracts to enable the first elastic member to accumulate elastic force;

when the first spring bolt stretches out the lock case, the first spring bolt gives way to a space to allow the second limiting part to move from the first position to the second position, the first elastic part releases elastic force to drive the second limiting part to move from the first position to the second position, and when the second limiting part is located at the second position, the first spring bolt is locked in a stretching state by the second limiting part.

In the technical scheme, in the locking process, the first lock tongue and the first limiting piece are pressed and firstly retracted into the lock shell, at the moment, the first lock tongue blocks the second limiting piece, the second limiting piece is positioned at the first position and is fixed, and at the moment, the first elastic piece between the first limiting piece and the second limiting piece is compressed and accumulates elastic force; when the lock is closed, the first lock tongue extends out of the lock shell to be locked, and due to the fact that the first lock tongue leaves the space, the elastic force accumulated by the first elastic piece is released, so that the second limiting piece is driven to move from the first position to the second position, the second limiting piece blocks on the retraction path of the first lock tongue, the first lock tongue cannot retract, and the effect of locking the first lock tongue is achieved. The tapered end that this application embodiment provided, through setting up first spring bolt, first locating part, second locating part and the cooperation of first elastic component, first spring bolt and second locating part restrict each other from the space, and combine the effect of first elastic component, form first spring bolt and first locating part action earlier during the lock of closing, the order of back second locating part action, make the second locating part stretch out to block on the withdrawal route of first spring bolt after locking at first spring bolt, automatic locking after closing the lock, be difficult to through the first spring bolt of card or other technological retractions.

Optionally, in an embodiment of the present application, the limiting mechanism further includes a second elastic member, and the second elastic member acts on the first limiting member to drive the first limiting member from the retracted position to the extended position.

Among the above-mentioned technical scheme, through setting up the second elastic component, after unblanking, the second elastic component makes first locating part get back to the extended position to drive the withdrawal of first elastic component and the second locating part that connects, make the second locating part return to the first position by the second position, thereby release first spring bolt.

Optionally, in an embodiment of the present application, the first limiting member and the second limiting member are both limiting pins, the first limiting member is a hollow structure with an opening at one end, the second limiting member is axially movably disposed in the first limiting member, and the first elastic member is disposed in the first limiting member.

Among the above-mentioned technical scheme, through setting up first locating part and second locating part as the spacer pin to set up first locating part as the hollow structure that can hold first elastic component and second locating part, at the lock in-process that closes, when first elastic component was compressed, the second locating part can be retracted in the first locating part, and stop gear is whole less, and the volume of lock shell can be set up littleer.

Optionally, in an embodiment of the present application, a first stopping portion is disposed at an opening of the first limiting member, a second stopping portion is disposed at an end of the second limiting member, which extends into the first limiting member, and the first stopping portion and the second stopping portion are used for cooperatively limiting the second limiting member to be disengaged from the opening of the first limiting member.

In the above technical scheme, the first stopping portion and the second stopping portion are matched to limit the second limiting member, and two ends of the first elastic member do not need to be fixed to the first limiting member and the second limiting member, so that the first limiting member and the second limiting member can be prevented from being separated, and can be conveniently detached and replaced.

Optionally, in an embodiment of the present application, the lock housing is connected to the first latch tongue via a rotating shaft, and the first latch tongue can be extended out of the lock housing or retracted into the lock housing by being rotated around the rotating shaft.

Among the above-mentioned technical scheme, through being connected first spring bolt and lock shell pivot, first spring bolt is set to the upset and stretches out or the upset withdrawal, for the motion mode of current common straight section of thick bamboo switching formula, has further stopped the lock and has used the card to dial the hidden danger of first spring bolt after closing.

Optionally, in an embodiment of the present application, the lock cylinder further includes a torsion spring, and the torsion spring is configured to drive the first lock tongue to rotate around the rotation shaft and extend out of the lock case.

Among the above-mentioned technical scheme, stretch out through setting up the first spring bolt of torsional spring drive, need not to set up the first spring bolt of drive such as motor, the energy can be saved, the low power dissipation.

Optionally, in an embodiment of the present application, the first bolt extends from a first surface of the lock case, and the first retaining member extends from a second surface of the lock case.

In the technical scheme, the first lock tongue and the extending path of the first limiting part form a certain included angle, so that the second limiting part connected with the first limiting part easily forms interference with the first lock tongue in space, and the mutual limiting effect is realized.

Optionally, in an embodiment of the present application, a chamber for accommodating the first bolt and an accommodating hole for accommodating the limiting mechanism are provided on the lock case, an inner end of the accommodating hole communicates with the chamber, and an outer end of the accommodating hole extends to the second surface.

In the technical scheme, the first lock bolt occupies the cavity when retracting the lock shell, and when the first lock bolt extends out, the first limiting piece is pressed on the second surface of the lock shell, so that the second limiting piece can enter the cavity from the accommodating hole to prevent the first lock bolt from retracting.

Optionally, in an embodiment of the present application, a snap ring is installed at an outer end of the accommodating hole, a third stopping portion is disposed on the first limiting member, and the snap ring is used to cooperate with the third stopping portion to limit the first limiting member to be disengaged from the accommodating hole.

Among the above-mentioned technical scheme, limit mechanism deviates from through setting up the snap ring restriction stop mechanism, and stop mechanism easy to assemble to and make things convenient for later stage maintenance to change.

In a second aspect, an embodiment of the present application provides a lock, which includes a lock box and the lock head, where the lock box is provided with a second lock tongue;

when the lock head enters the lock box, the first bolt retracts into the lock shell under the extrusion of the second bolt, and the first limiting piece retracts into the lock shell under the extrusion of the side wall of the lock box;

when the first lock bolt passes over the second lock bolt, the first lock bolt extends out of the lock shell and is clamped with the second lock bolt, and the second limiting part locks the first lock bolt in an extending state.

In the technical scheme, in the locking process, when the lock head enters the lock body, the first lock tongue and the first limiting piece are limited to retract into the lock shell, and the first elastic piece compresses for energy storage under the matching of the first lock tongue and the first limiting piece; when the first lock tongue extends out and is clamped with the second lock tongue, the first elastic piece drives the second limiting piece to block on a retraction path of the first lock tongue, and locking is achieved. The tool to lock that this application embodiment provided, tapered end and lock box cooperation are locked the back, and the withdrawal route of first spring bolt is blocked, closes automatic locking behind the lock, is difficult to through the first spring bolt of card or other technical withdrawal.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is an exploded view of a lock cylinder provided in an embodiment of the present application;

FIG. 2 is an enlarged view of portion I of FIG. 1;

FIG. 3 is a schematic structural view of a limiting mechanism;

fig. 4 is a schematic side sectional view of a lock provided in an unlocked state according to an embodiment of the present application;

FIG. 5 is a diagram illustrating a locking process of a lock according to an embodiment of the present disclosure;

FIG. 6 is a diagram illustrating a locked state of the lock according to an embodiment of the present disclosure;

fig. 7 is a schematic top sectional view of a lock cylinder provided in an embodiment of the present application in an unlocked state;

FIG. 8 is a schematic top cross-sectional view of a lock cylinder provided in an embodiment of the present application during a locking process;

FIG. 9 is a schematic top cross-sectional view of a lock cylinder in a locked state according to an embodiment of the present disclosure;

fig. 10 is a schematic rear sectional view of another limiting mechanism provided in the embodiment of the present application in an unlocked state;

FIG. 11 is a schematic cross-sectional rear view of another exemplary stop mechanism of the present application during a locking process;

fig. 12 is a schematic rear sectional view of another limiting mechanism in a locked state according to an embodiment of the present application.

Icon: 100-a lock head; 110-a lock case; 111-snap ring; 120-a chamber; 130-a containment hole; 140-a first bolt; 141-a rotating shaft; 142-a torsion spring; 150 — a first stop; 151-first stop; 152-a third stop; 160-a second stop; 161-a second stop; 170-a first elastic member; 180-a second elastic member; 200-a handle; 300-a lock box; 310-a second bolt; 410-a first stop; 420-a second stop; 430-a first elastic member; 440-a second resilient member; 530-containing hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

In the description of the present application, it should be noted that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate an orientation or positional relationship based on that shown in the drawings or that is usually placed when the product of the application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.

Examples

The existing locks such as door lock bodies or cabinet locks are usually straight-tube opening and closing type locks, generally have no self-locking devices, and the lock tongue is easy to retract by using tools such as cards, so that the locks are technically opened.

The embodiment of the application provides a lock head 100 and a lock, which are used for solving the problem that the lock is easily unlocked by a technology.

In the embodiment, a cabinet lock is taken as an example, as shown in fig. 4 and 5, the lock includes a lock housing 110 and a lock head 100, and the lock head 100 is connected to a handle 200 of the cabinet.

The lock head 100 includes a lock case 110, and a first bolt 140 and a position limiting mechanism installed in the lock case 110.

The limiting mechanism includes a first limiting member 150, a second limiting member 160 and a first elastic member 170, and the first elastic member 170 is disposed between the first limiting member 150 and the second limiting member 160. The first position-limiting member 150 is movably mounted on the lock case 110, the first position-limiting member 150 has an extended position extended out of the lock case 110 and a retracted position retracted into the lock case 110, the second position-limiting member 160 is connected to the first position-limiting member 150 via a first elastic member 170, and the second position-limiting member 160 has a first position and a second position.

When the first bolt 140 retracts into the lock case 110, the first bolt 140 occupies the space inside the lock case 110, so that the moving path of the second limiting member 160 is blocked, and the second limiting member 160 is prevented from moving from the first position to the second position, and at this time, if the first limiting member 150 moves to the retracted position, the first limiting member 150 and the second limiting member 160 cooperate to compress the first elastic member 170, so that the first elastic member 170 can accumulate an elastic force.

When the first bolt 140 extends out of the lock case 110, the space inside the lock case 110 that the first bolt 140 originally occupies is made free, and the moving path of the second limiting member 160 is clear, so as to allow the second limiting member 160 to move from the first position to the second position. At this time, if the first limiting member 150 is at the retracted position, the first elastic member 170 releases the elastic force to drive the second limiting member 160 to move from the first position to the second position.

When the second limiting member 160 is at the second position, the first bolt 140 is locked in the extended state by the second limiting member 160.

That is to say, in the lock head 100 provided in the embodiment of the present application, the first bolt 140 and the second limiting member 160 are limited from space to space, and in combination with the action of the first limiting member 150 and the first elastic member 170, a sequence of first action of the first bolt 140 and the first limiting member 150 and then action of the second limiting member 160 is formed when the lock is closed, so that the second limiting member 160 is blocked on the retraction path of the first bolt 140 after the first bolt 140 is extended and locked, and the first bolt 140 is automatically locked after the lock is closed, and is not easy to retract into the first bolt 140 by a card or other techniques.

Fig. 1 and 2 illustrate the structure of a lock cylinder 100, the lock cylinder 100 including a lock case 110 coupled to an armrest, the lock case 110 having a chamber 120 formed therein, and a receiving hole 130 formed in a sidewall of the chamber 120.

The chamber 120 is used to accommodate the first bolt 140, and an opening is formed on a first surface of the lock case 110, and the first bolt 140 in the chamber 120 is extended or retracted from the opening on the first surface. The first bolt 140 is connected to the lock case 110 through a rotation shaft 141, and the first bolt 140 can rotate around the rotation shaft 141, so that the first bolt 140 can be extended out of the lock case 110 in a tilting manner or retracted into the lock case 110 in a tilting manner.

A torsion spring 142 is further disposed between the first locking tongue 140 and the lock case 110, and the torsion spring 142 is used for driving the first locking tongue 140 to be extended out of the lock case 110 in a turning manner, so that the first locking tongue 140 maintains an elastically extended state in a natural state.

Through setting up first spring bolt 140 to the flexible prevention of upset, compare with ordinary straight section of thick bamboo switching formula spring bolt, the first spring bolt 140 of upset motion is difficult to be promoted by simple tools such as card and contracts, has reduced the hidden danger of being unblanked by the technique.

The first latch tongue 140 is formed with an inclined surface for cooperating with the lock case 300, and when the lock is closed, the inclined surface interferes with the lock case 300 to retract the latch tongue, and a blocking surface for cooperating with the limiting mechanism to limit the first latch tongue 140 from being turned over.

The accommodating hole 130 is used for accommodating a limiting mechanism, the inner end of the accommodating hole 130 is communicated with the chamber 120, the outer end of the accommodating hole 130 extends to the second surface, the first limiting member 150 of the limiting mechanism extends or retracts from the second surface, namely the outer end of the accommodating hole 130, the second limiting member 160 is at the first position when the second limiting member 160 is in the accommodating hole 130, and is at the second position when the second limiting member 160 extends into the chamber 120 from the inner end of the accommodating hole 130.

As shown in fig. 3 and fig. 7, the first limiting member 150 and the second limiting member 160 are configured as two limiting pins, and the first elastic member 170 is configured as a spring.

The two limit pins may be directly connected or connected with each other through the first elastic member 170.

In the present embodiment, the first limiting member 150 is configured as a hollow structure with an opening at one end, one end of the second limiting member 160 extends into the first limiting member 150, and the other end of the second limiting member 160 can extend out of the opening of the first limiting member 150. The first stopper portion 151 is disposed at an opening position of the first limiting member 150, the first stopper portion 151 is configured as a detachable annular flange, a second stopper portion 161 is formed at one end of the second limiting member 160, the second stopper portion 161 is configured as a boss formed on the second limiting member 160, and the first stopper portion 151 and the second stopper portion 161 cooperate to limit the second limiting member 160 to be disengaged. When the first stopping portion 151 is removed, the second limiting member 160 can be conveniently put in or taken out.

In the embodiment, the first elastic member 170 is disposed in the hollow structure of the first limiting member 150, one end of the first elastic member 170 abuts against the bottom of the hollow structure, and the other end of the first elastic member 170 abuts against one end of the second limiting member 160.

By configuring the first limiting member 150 as a hollow structure, a space for temporarily storing the second limiting member 160 is formed in the first limiting member 150, when the first elastic member 170 is compressed, or when the first limiting member 150 and the second limiting member 160 are retracted into the accommodating hole 130 at the same time, the overall size of the limiting mechanism is small, and the length of the accommodating hole 130 can be configured to be smaller, so that the thickness of the lock case 110 and the size of the lock case 110 can be configured to be smaller.

Optionally, a boss is also formed at the other end of the second limiting member 160 to prevent the second limiting member 160 from passing through the first stopping portion 151, so that the second limiting member 160 is completely immersed in the first limiting member 150. In other embodiments, the first elastic member 170 may be sleeved on the second limiting member 160, one end of the first elastic member 170 abuts against the first blocking portion 151, and the other end of the first elastic member 170 abuts against the boss at the other end of the second limiting member 160.

The lock case 110 further has a retaining ring 111, the retaining ring 111 is detachably connected to the lock case 110 at the outer end of the accommodating hole 130, the second limiting member 160 has a third stopping portion 152, referring to fig. 3 and 9, the third stopping portion 152 is formed outside the second limiting member 160, and the third stopping portion 152 is matched with the retaining ring 111 to allow the end of the first limiting member 150 to extend out of the lock case 110 and prevent the second limiting member 160 from coming out of the accommodating hole 130. When the installation and maintenance are carried out, the limiting mechanism can be conveniently placed in or taken out by detaching the clamping ring 111.

In order to make the first limiting member 150 return to the position extending from the outer end of the accommodating hole 130, so that the second limiting member 160 can be driven to return to the first position, the limiting mechanism further includes a second elastic member 180, and the second elastic member 180 is disposed between the first limiting member 150 and the accommodating hole 130. As shown in fig. 9, a flange capable of allowing the second limiting member 160 to pass through is formed at the inner end of the accommodating hole 130, in this embodiment, the second elastic member 180 is configured as a spring, one end of the second elastic member 180 abuts against the third stopping portion 152, and the other end of the second elastic member 180 abuts against the flange at the inner end of the accommodating hole 130.

As can be seen from fig. 2 or fig. 8, the moving path of the first bolt 140 forms an angle with and intersects the moving path of the limiting mechanism, and the second limiting member 160 can spatially block the first bolt 140 and abut against the back of the first bolt 140, that is, the surface of the first bolt 140 away from the first surface, so as to prevent the first bolt 140 from retracting.

In other embodiments, the first latch 140 may be further configured to form a limiting groove on a side surface thereof, that is, a surface of the first latch 140 close to the receiving hole 130, and during the extension of the first latch 140, when the limiting groove corresponds to the receiving hole 130, the second limiting member 160 is inserted into the limiting groove to prevent the first latch 140 from extending or retracting, thereby locking the first latch 140.

This application embodiment utilizes convertible switching mode to improve the degree of difficulty that the technique unblanked, with the cooperation of stop gear and the first spring bolt 140 of convertible switching, closes the automatic rotation route of blockking at first spring bolt 140 of back second locating part 160 of locking, further improves the degree of difficulty that the technique unblanked, reduces the hidden danger of unblanking by the technique.

Alternatively, as shown in fig. 4, the rotating shaft 141 of the first bolt 140 is disposed near the bottom of the first bolt 140, and the second limiting member 160 is disposed near the top of the first bolt 140, so as to increase the torque for preventing the first bolt 140 from rotating, and the second limiting member 160 is not easily failed or damaged by force.

The locking process of the lock cylinder 100 provided by the present application is shown in fig. 4 and fig. 5, the present embodiment takes a cabinet lock as an example for description, and a second locking tongue 310 is disposed in a lock box 300 for cooperating with the lock cylinder 100 to lock.

Fig. 5 is a diagram of a locking process, when the lock cylinder 100 enters the lock box 300, the second bolt 310 (if other types of locks, the side wall of the lock box 300 may also be the side wall of the lock box 300) in the lock box 300 abuts against the inclined surface of the first bolt 140, and the side wall of the lock box 300 abuts against the first limiting member 150.

As the lock cylinder 100 continues to enter the lock box 300, the first bolt 140 is flipped about its axis of rotation 141 upon contact by the second bolt 310, such that the first bolt 140 is gradually retracted into the cavity 120 of the lock housing 110. Meanwhile, as the lock cylinder 100 continues to enter the lock case 300, the first position-limiting member 150 is pressed by the inner wall of the lock case 110, so that the first position-limiting member 150 is retracted into the receiving hole 130 of the lock case 110.

As shown in fig. 7, since the inner end of the receiving hole 130 is blocked by the first latch 140, the second limiting member 160 cannot enter the cavity 120 from the receiving hole 130, the second limiting member 160 is retained in the receiving hole 130 during the locking process, and the first elastic member 170 is compressed by the first limiting member 150 and the second limiting member 160 and accumulates elastic force.

When the lock cylinder 100 further enters the lock box 300 and is in place, as shown in fig. 6, the first bolt 140 passes over the second bolt 310, the inclined surface of the first bolt 140 is separated from the second bolt 310, and the surface of the second bolt 310 away from the opening of the lock box 300 abuts against the first bolt 140, so as to limit the lock cylinder 100 from exiting the lock box 300. Meanwhile, referring to fig. 9, the first bolt 140 leaves the inner end of the receiving hole 130, the second limiting member 160 extends into the cavity 120 of the lock housing 110 under the action of the first elastic member 170, and the second limiting member 160 abuts against the blocking surface of the first bolt 140, so that the first bolt 140 cannot turn around the rotating shaft 141, thereby achieving locking.

After the lock is unlocked, the lock 100 is pulled out of the lock box 300, the side wall of the lock box 300 is far away from the lock 100, the first limiting member 150 is separated from the side wall of the lock box 300, the second elastic member 180 drives the first elastic member 170 to extend out of the lock case 110 from the outer end of the accommodating hole 130, the first limiting member 150 moves to drive the second limiting member 160 to retract into the accommodating hole 130 from the inner end of the accommodating hole 130, the limitation on the first lock tongue 140 is removed, and the first lock tongue 140 is in an elastically telescopic state.

Based on the inventive concept of the present application, the lock cylinder 100 and the position-limiting mechanism thereof may be modified, for example, as shown in fig. 10, 11 and 12, the viewing angles of fig. 10 to 12 are the viewing angles viewed from the back of the lock case 110, the back of the lock case 110 is the side opposite to the opening of the cavity 120, and the direction of the first bolt 140 entering and exiting the cavity 120 is perpendicular to the paper surface.

In fig. 10 to 12, the limiting mechanism includes a first limiting member 410, a second limiting member 420, a first elastic member 430 and a second elastic member 440.

The first and second stoppers 410 and 420 are configured as levers rotatably connected, a first elastic member 430 is disposed between the two levers, the first elastic member 430 may be configured as a torsion spring 142 disposed at a rotational position, or the first elastic member 430 is configured as a spring supported between the two levers. The first limiting member 410 is rotatably connected to the bottom side of the inner wall of the receiving hole 530, the second elastic member 440 is configured as the torsion spring 142 disposed at a rotational position, or the second elastic member 440 is configured as a spring connected between the first limiting member 410 and the inner wall of the receiving hole 530.

The receiving hole 530 of the lock case 110 is configured to have a shape that allows the first limiting member 410 and the second limiting member 420 to be turned in and out, for example, when the first limiting member 410 and the second limiting member 420 are rod members, the receiving hole 530 is configured as a flat hole having a height greater than a rotation radius of the two rod members.

In an unlocked state, referring to fig. 10, the first limiting member 410 is kept close to the bottom side of the inner wall of the accommodating hole 530 and extended under the action of the first elastic member 430, and the second limiting member 420 is retracted in the accommodating hole 530.

In the locking process, referring to fig. 11, the first latch 140 retracts into the cavity 120 to block the inner end of the accommodating hole 530, the first limiting member 410 is retracted into the accommodating hole 530, the first limiting member 410 and the second limiting member 420 cooperate to compress the first elastic member 430, and the first elastic member 430 accumulates elastic force.

After the first latch 140 is extended and locked, referring to fig. 12, the first latch 140 leaves the receiving hole 530, and the second limiting member 420 is turned and extended into the cavity 120 under the driving of the first elastic member 430, so that the second limiting member 420 abuts against the blocking surface of the first latch 140 to lock the first latch 140.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A lock cylinder, comprising:

a lock case;

the first bolt is arranged on the lock shell;

the limiting mechanism is arranged on the lock shell and comprises a first limiting piece, a second limiting piece and a first elastic piece, the first elastic piece is arranged between the first limiting piece and the second limiting piece, the first limiting piece is provided with an extending position extending out of the lock shell and a retracting position retracting into the lock shell, and the second limiting piece is provided with a first position and a second position;

when the first lock tongue retracts into the lock shell, the first lock tongue occupies a space to prevent the second limiting member from moving from the first position to the second position, and the first limiting member retracts to enable the first elastic member to accumulate elastic force;

when the first spring bolt stretches out the lock case, the first spring bolt gives way to a space to allow the second limiting part to move from the first position to the second position, the first elastic part releases elastic force to drive the second limiting part to move from the first position to the second position, and when the second limiting part is located at the second position, the first spring bolt is locked in a stretching state by the second limiting part.

2. The lock cylinder according to claim 1, wherein the limiting mechanism further comprises a second elastic member acting on the first limiting member for urging the first limiting member from the retracted position to the extended position.

3. The lock head according to claim 1, wherein the first limiting member and the second limiting member are both limiting pins, the first limiting member is a hollow structure with an opening at one end, the second limiting member is axially movably disposed in the first limiting member, and the first elastic member is disposed in the first limiting member.

4. The lock head according to claim 3, wherein a first stop portion is disposed at the opening of the first limiting member, a second stop portion is disposed at an end of the second limiting member extending into the first limiting member, and the first stop portion and the second stop portion are configured to cooperate with each other to limit the second limiting member from coming out of the opening of the first limiting member.

5. The lock cylinder according to claim 1, wherein the lock housing is connected to the first bolt via a pivot axis about which the first bolt can be pivoted out of the lock housing or pivoted back into the lock housing.

6. The lock cylinder according to claim 5, further comprising a torsion spring for driving the first bolt to rotate around the rotation axis to extend out of the lock housing.

7. The lock cylinder according to claim 1, wherein the first locking bolt extends from a first surface of the housing and the first retaining member extends from a second surface of the housing.

8. The lock cylinder according to claim 7, wherein the lock housing defines a cavity for receiving the first locking bolt and a receiving bore for receiving the limiting mechanism, an inner end of the receiving bore communicates with the cavity, and an outer end of the receiving bore extends to the second surface.

9. The lock according to claim 8, wherein a snap ring is mounted at an outer end of the receiving hole, and a third stop portion is disposed on the first position-limiting member, and the snap ring is adapted to cooperate with the third stop portion to limit the first position-limiting member from being removed from the receiving hole.

10. A lock, characterized in that it comprises a lock box and a lock head as claimed in any one of claims 1 to 9, the lock box is provided with a second bolt;

when the lock head enters the lock box, the first bolt retracts into the lock shell under the extrusion of the second bolt, and the first limiting piece retracts into the lock shell under the extrusion of the side wall of the lock box;

when the first lock bolt passes over the second lock bolt, the first lock bolt extends out of the lock shell and is clamped with the second lock bolt, and the second limiting part locks the first lock bolt in an extending state.

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