CN213838083U

CN213838083U - Positioning lock tongue assembly and lock

Info

Publication number: CN213838083U
Application number: CN202021331188.5U
Authority: CN
Inventors: 陈长才; 张天长; 徐燕兵
Original assignee: Zhaoqing Zhicheng Door Accessories Co ltd
Current assignee: Zhaoqing Zhicheng Door Accessories Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-07-30
Anticipated expiration: 2030-07-08

Abstract

The utility model discloses a location spring bolt subassembly and tool to lock, tool to lock include location spring bolt subassembly, and location spring bolt subassembly includes: the sliding piece is slidably arranged in the lock shell; the bolt is rotatably connected with the sliding piece and is provided with a first side surface facing the door opening direction and a second side surface facing the door closing direction; the first elastic reset piece is arranged between the sliding piece and the lock shell; the limiting structure is arranged between the sliding part and the spring bolt and used for limiting the rotation angle of the spring bolt so that the spring bolt is provided with a first limit position and a second limit position, the second side surface is in an inclined state when the spring bolt rotates to the first limit position, and the first side surface is in an inclined state when the spring bolt rotates to the second limit position; the locking piece is slidably arranged on the sliding piece and can limit the bolt to rotate so as to lock the bolt at a first limit position or a second limit position; the second elasticity resets, sets up between locking piece and slider. Through the structure, the door can be opened without unlocking.

Description

Positioning lock tongue assembly and lock

Technical Field

The utility model relates to a tool to lock field, in particular to location spring bolt subassembly and tool to lock.

Background

At present, with the development of social life and technology, hardware related to home furnishing is developed like bamboo shoots in spring after rain. The lock is rapidly popularized due to the gradual improvement of public safety awareness, and the lock begins to develop towards convenience and intellectualization on the premise of ensuring the anti-theft function.

Among the prior art, all slide in the lock shell of most of tool to locks and be provided with the spring bolt that can stretch out the lock shell, close the door after, the spring bolt that is located the lock shell stretches out the lock shell and inserts in the keyhole on the door frame, in order to realize the function of locking, and according to the user demand of difference, traditional tool to lock has the main spring bolt subassembly that is used for the theftproof usually and is used for the interim locking bolt subassembly that the door body just has the function of preventing wind of locking, in scenes such as at home life or office official working, in order to open the door, only lock the door body of bedroom or the door body of office temporarily through the location spring bolt subassembly, but, in above-mentioned scene, no matter open the door in the door or open the door outside, all need open the action earlier and just can open the door, inconvenience has been brought for the user.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a need not the location spring bolt subassembly that the action of unblanking can open the door.

The utility model discloses still provide a tool to lock that has above-mentioned location spring bolt subassembly.

According to the utility model discloses a location spring bolt subassembly of first aspect embodiment for the tool to lock that has the lock shell, include: a sliding member slidably disposed within the lock housing; the bolt is rotatably connected to the sliding piece and is provided with a first side surface facing the door opening direction and a second side surface facing the door closing direction; the first elastic resetting piece is arranged between the sliding piece and the lock shell, the first elastic resetting piece can provide elastic force for driving the sliding piece to slide and driving the spring bolt to extend out of the lock shell, and the spring bolt can overcome the elastic force of the first elastic resetting piece and retract into the lock shell when being subjected to external force; the limiting structure is arranged between the sliding part and the spring bolt and used for limiting the rotation angle of the spring bolt so that the spring bolt has a first limit position and a second limit position, when the spring bolt rotates to the first limit position, the second side surface is in an inclined state so that the spring bolt can be retracted into the lock shell under the reaction force of the door frame when the door is closed, and when the spring bolt rotates to the second limit position, the first side surface is in an inclined state so that the spring bolt can be retracted into the lock shell under the reaction force of the lock hole when the door is opened; the locking piece is arranged on the sliding piece in a sliding mode and can limit the rotation of the lock tongue so as to lock the lock tongue at a first limit position or a second limit position, and the lock tongue can lock the door body when being locked at the first limit position and positioned in the lock hole; second elasticity resets, second elasticity reset set up in the locking piece with between the slider, second elasticity resets can provide and orders about the locking piece slides to the restriction the spring bolt pivoted position, just the locking piece can overcome when receiving external force the elastic force that second elasticity resets slides, in order to relieve the restriction of right the spring bolt.

According to the utility model discloses location spring bolt subassembly has following beneficial effect at least: when the door is closed, the second side surface is subjected to the reaction force of the door frame, so that the lock tongue acts on the locking piece, the locking piece overcomes the elastic force of the second elastic resetting piece to release the limitation on the lock tongue, the lock tongue rotates to a first limit position, the second side surface is in an inclined state at the moment, in the process of closing the door, the reaction force of the door frame acts on the second side surface to enable the lock tongue to be retracted into the lock shell, and after the door body is closed, the lock tongue is inserted into the lock hole under the action of the first elastic resetting piece to lock the door body; when opening the door, first side receives the counter force of lockhole, makes the spring bolt acts on the lock piece, thereby makes the lock piece overcomes the elastic force of second elasticity piece that resets is in order to remove right the restriction of spring bolt makes the spring bolt rotates to second extreme position, this moment first side is in the tilt state, and at the in-process that opens the door, the counter force of lockhole acts on first side so that the spring bolt is withdrawed in the lock shell to open a body. Through the structure, a user can open the door body temporarily locked only through the positioning lock tongue assembly without unlocking, and convenience is brought to the user. Specific, for example, when the user can't vacate both hands in the handheld heavy object in the door outside, need not to put down the heavy object and carry out the action of unblanking, only need apply sufficient external force to the door body and can accomplish the action of opening the door, for example again, when the user group contains the less children of age, need not worry because the height can't carry out the action of unblanking inadequately, only need apply sufficient external force to the door body and can accomplish the action of opening the door, very convenient.

According to some embodiments of the present invention, the sliding member is provided with a mounting hole corresponding to the locking member, the locking member is slidably inserted into the mounting hole, one end of the locking member close to the lock tongue can extend out of the mounting hole to the rotation path of the lock tongue under the action of the second elastic restoring member to limit the rotation of the lock tongue, and one end of the locking member close to the lock tongue is wedge-shaped to form a first inclined pushing surface and a second inclined pushing surface which are symmetrical to each other, when the door is closed, the lock tongue receives the reaction force of the door frame and acts on the first inclined pushing surface to drive the locking member to slide against the elastic force of the second elastic restoring member, so as to release the limitation of the locking member on the lock tongue, so that the lock tongue can rotate from the second limit position to the first limit position, and when the door is opened, the spring bolt receives the reaction force of lockhole and acts on the second slope pushing surface is in order to order about the locking piece overcomes the elastic force of second elasticity piece that resets slides, thereby removes the locking piece is to the restriction of spring bolt makes the spring bolt can rotate to the second extreme position by first extreme position.

According to some embodiments of the utility model, the second elasticity reset piece for set up in first compression spring in the mounting hole, first compression spring's one end butt in the locking piece, the other end butt in the slider.

According to some embodiments of the utility model, the locking piece is kept away from the one end of spring bolt is provided with first spacing hole, first compression spring is close to the one end of locking piece is inserted and is located in first spacing hole, in order to prevent first compression spring drunkenness, so that first compression spring can be stably for the locking piece provides the elastic force.

According to the utility model discloses a few embodiments, the lock part is close to the one end of spring bolt is provided with first fillet, just the spring bolt is close to the one end of lock part is provided with the second fillet, is favorable to improving stationarity when the spring bolt rotates.

According to some embodiments of the utility model, limit structure is including setting up spacing portion on the slider, spacing portion set up in the slider is close to the one end of spring bolt, be provided with the chamfer in the spacing portion to form first butt face and the second butt face of mutual symmetry, correspond on the spring bolt spacing portion is provided with and dodges the groove, spacing portion is inserted and is located dodge the inslot, just the spring bolt can rotate to making dodge the groove orientation the cell wall butt of slider in first butt face or butt in the second butt face, with the restriction the spring bolt continues to rotate, thereby the restriction the turned angle of spring bolt.

According to some embodiments of the utility model, first elasticity returns the piece to be second compression spring, second compression spring's one end butt in slider, other end butt is in the lock shell.

According to some embodiments of the utility model, the slider is kept away from the one end of spring bolt is provided with the spacing hole of second, second compression spring is close to the one end of slider is inserted and is located the spacing downthehole of second to prevent second compression spring drunkenness, so that second compression spring can be steadily for the slider provides the elastic force.

According to the utility model discloses a some embodiments, first side with second side symmetry sets up to can adapt to inwards open the door and outwards open the door the mode of opening of two kinds of different orientations, improve the commonality.

According to the utility model discloses a tool to lock of second aspect embodiment, it includes according to the utility model discloses the location spring bolt subassembly of above-mentioned first aspect embodiment.

According to the utility model discloses tool to lock has following beneficial effect at least: when the door is closed, the second side surface is subjected to the reaction force of the door frame, so that the lock tongue acts on the locking piece, the locking piece overcomes the elastic force of the second elastic resetting piece to release the limitation on the lock tongue, the lock tongue rotates to a first limit position, the second side surface is in an inclined state at the moment, in the process of closing the door, the reaction force of the door frame acts on the second side surface to enable the lock tongue to be retracted into the lock shell, and after the door body is closed, the lock tongue is inserted into the lock hole under the action of the first elastic resetting piece to lock the door body; when opening the door, first side receives the counter force of lockhole, makes the spring bolt acts on the lock piece, thereby makes the lock piece overcomes the elastic force of second elasticity piece that resets is in order to remove right the restriction of spring bolt makes the spring bolt rotates to second extreme position, this moment first side is in the tilt state, and at the in-process that opens the door, the counter force of lockhole acts on first side so that the spring bolt is withdrawed in the lock shell to open a body. Through the structure, a user can open the door body temporarily locked only through the positioning lock tongue assembly without unlocking, and convenience is brought to the user. Specific, for example, when the user can't vacate both hands in the handheld heavy object in the door outside, need not to put down the heavy object and carry out the action of unblanking, only need apply sufficient external force to the door body and can accomplish the action of opening the door, for example again, when the user group contains the less children of age, need not worry because the height can't carry out the action of unblanking inadequately, only need apply sufficient external force to the door body and can accomplish the action of opening the door, very convenient.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic cross-sectional view of a lock according to an embodiment of the present invention;

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

fig. 3 is a schematic structural view of the positioning latch bolt assembly of the embodiment of the present invention in the first extreme position;

FIG. 4 is a schematic cross-sectional view taken at A-A in FIG. 3;

FIG. 5 is a schematic cross-sectional view taken at B-B of FIG. 3;

fig. 6 is a schematic structural view of the positioning latch bolt assembly of the embodiment of the present invention in the second extreme position;

fig. 7 is an exploded view of the positioning latch bolt assembly of the present invention in the second extreme position.

Reference numerals:

the sliding member 10, the mounting hole 11, the stopper 12, the first abutting surface 121, the second abutting surface 122, the second stopper hole 13, and the guide groove 14;

the bolt 20, the first side surface 21, the second side surface 22, the second fillet 23, the avoiding groove 24 and the groove wall 241;

a first elastic restoring member 30;

the locking piece 40, a first inclined pushing surface 41, a second inclined pushing surface 42, a first limiting hole 43 and a first fillet 44;

a second resilient return member 50.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the directions or positional relationships indicated by the upper, lower, front, rear, left, right, etc. are the directions or positional relationships shown on the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element 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 invention.

In the description of the present invention, if there are several, greater than, less than, exceeding, above, below, within, etc., the terms, wherein several means are one or more, and several means are two or more, and greater than, less than, exceeding, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

In the description of the present invention, if the terms first, second, etc. appear, they are only used for distinguishing technical features, but they are not to be interpreted as indicating or implying relative importance or implying that the number of the indicated technical features is indicated or that the precedence of the indicated technical features is implied.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 3 to 6, a positioning latch bolt assembly according to an embodiment of the present invention for a lock having a lock case includes a sliding member 10, a latch bolt 20, a first elastic restoring member 30, a limiting structure, a locking member 40, and a second elastic restoring member 50.

The sliding part 10 is slidably disposed in the lock case, the locking bolt 20 is rotatably connected to the sliding part 10, the locking bolt 20 has a first side 21 facing the door opening direction and a second side 22 facing the door closing direction, the first elastic restoring member 30 is disposed between the sliding part 10 and the lock case, the first elastic restoring member 30 can provide an elastic force for driving the sliding part 10 to slide and driving the locking bolt 20 to extend out of the lock case, the locking bolt 20 can be retracted into the lock case against the elastic force of the first elastic restoring member 30 when being subjected to an external force, the limiting structure is disposed between the sliding part 10 and the locking bolt 20 and is used for limiting the rotation angle of the locking bolt 20, so that the locking bolt 20 has a first limit position and a second limit position, when the locking bolt 20 rotates to the first limit position, the second side 22 is in an inclined state, so that the locking bolt 20 can be retracted into the lock case under the counter-force of the door frame when the door is closed, and when the locking bolt 20 rotates to the second limit position, first side 21 is in the tilt state to make spring bolt 20 can withdraw in the lock shell under the reaction force of lockhole when opening the door, lock piece 40 sets up on slider 10 slidable, lock piece 40 can restrict spring bolt 20 and rotate, so as to lock in first extreme position or second extreme position with spring bolt 20, and spring bolt 20 locks in first extreme position and when being located the lockhole, can lock the door body, second elasticity resets 50 and sets up between lock piece 40 and slider 10, second elasticity resets 50 can provide and impel lock piece 40 to slide to the position of restriction spring bolt 20 pivoted, and lock piece 40 can overcome the elastic force of second elasticity resets 50 when receiving external force and slide, in order to relieve the restriction to spring bolt 20. Note that the door opening direction is a direction in which the door body faces when the door is opened, and the door closing direction is a direction in which the door body faces when the door is closed.

When the door is closed, the second side 22 receives the counterforce of the door frame, so that the bolt 20 acts on the locking piece 40, the locking piece 40 overcomes the elastic force of the second elastic resetting piece 50 to release the limitation on the bolt 20, the bolt 20 rotates to the first limit position, the second side 22 is in an inclined state, in the process of closing the door, the counterforce of the door frame acts on the second side 22 to enable the bolt 20 to be retracted into the lock shell, and after the door body is closed, the bolt 20 is inserted into the lock hole under the action of the first elastic resetting piece 30 to lock the door body; when opening the door, first side 21 receives the reaction force of lockhole, makes spring bolt 20 act on locking piece 40 to make locking piece 40 overcome the elastic force of second elasticity piece 50 and in order to remove the restriction to spring bolt 20, make spring bolt 20 rotate to second extreme position, first side 21 is in the tilt state this moment, and at the in-process that opens the door, the reaction force of lockhole acts on first side 21 so that spring bolt 20 withdraws in the lock shell, thereby opens a body. Through the structure, a user can open the door body temporarily locked only through the positioning lock tongue assembly without unlocking, and convenience is brought to the user. Specific, for example, when the user can't vacate both hands in the handheld heavy object in the door outside, need not to put down the heavy object and carry out the action of unblanking, only need apply sufficient external force to the door body and can accomplish the action of opening the door, for example again, when the user group contains the less children of age, need not worry because the height can't carry out the action of unblanking inadequately, only need apply sufficient external force to the door body and can accomplish the action of opening the door, very convenient.

Referring to fig. 1 to 4, in some embodiments, a mounting hole 11 is formed in the sliding member 10 corresponding to the locking member 40, the locking member 40 is slidably inserted into the mounting hole 11, one end of the locking member 40 close to the locking tongue 20 is capable of extending out of the mounting hole 11 to a rotation path of the locking tongue 20 under the action of the second elastic restoring member 50 to limit rotation of the locking tongue 20, and one end of the locking member 40 close to the locking tongue 20 is in a wedge shape to form a first inclined pushing surface 41 and a second inclined pushing surface 42 which are symmetrical to each other, when the door is closed, the locking tongue 20 receives a reaction force from the door frame and acts on the first inclined pushing surface 41 to drive the locking member 40 to slide against an elastic force of the second elastic restoring member 50, so as to release the locking tongue 20 from the second limit position, when the door is opened, the locking tongue 20 receives a reaction force from the locking hole and acts on the second inclined pushing surface 42 to drive the locking member 40 to overcome the second elastic restoring member 50 The elastic force of the locking member 40 is released from restricting the locking tongue 20, so that the locking tongue 20 can rotate from the first limit position to the second limit position.

It should be noted that, in some embodiments, one end of the locking member close to the lock tongue may also be an arc concave position, a circle center of the arc concave position coincides with a rotation center of the lock tongue, two hemispherical limiting grooves are disposed in the arc concave position and correspond to two extreme positions of the lock tongue, a spherical limiting protrusion is disposed on the lock tongue and corresponds to the hemispherical limiting groove, when the lock tongue rotates to the first extreme position, the spherical limiting protrusion can be clamped into one of the hemispherical limiting grooves, and when the lock tongue rotates to the second extreme position, the spherical limiting protrusion can be clamped into the other hemispherical limiting groove, which is not limited herein.

Referring to fig. 1, 2 and 5, in some embodiments, the second elastic restoring element 50 is a first compression spring disposed in the mounting hole 11, one end of the first compression spring abuts against the locking element 40, and the other end abuts against the slider 10.

Referring to fig. 1, 2 and 4, in some embodiments, an end of the locking member 40 away from the locking bolt 20 is provided with a first limiting hole 43, and an end of the first compression spring close to the locking member 40 is inserted into the first limiting hole 43 to prevent the first compression spring from moving, so that the first compression spring can stably provide an elastic force to the locking member 40.

It should be noted that, in some embodiments, the first compression spring may also be replaced by an air spring or a spring plate, which is not limited herein.

Referring to fig. 4, 6 and 7, in some embodiments, a first rounded corner 44 is formed at an end of the locking bolt 40 close to the locking bolt 20, and a second rounded corner 23 is formed at an end of the locking bolt 20 close to the locking bolt 40, which is beneficial to improving the smoothness of the locking bolt 20 during rotation.

Referring to fig. 5 and 7, in some embodiments, the limiting structure includes a limiting portion 12 disposed on the sliding member 10, the limiting portion 12 is disposed at one end of the sliding member 10 close to the lock tongue 20, a chamfer is disposed on the limiting portion 12 to form a first abutting surface 121 and a second abutting surface 122 that are symmetrical to each other, an avoiding groove 24 is disposed on the lock tongue 20 corresponding to the limiting portion 12, the limiting portion 12 is inserted into the avoiding groove 24, and the lock tongue 20 can rotate to enable the avoiding groove 24 to abut against the first abutting surface 121 or the second abutting surface 122 towards a groove wall 241 of the sliding member 10, so as to limit the lock tongue 20 from continuing to rotate, thereby limiting a rotation angle of the lock tongue 20.

It should be noted that, in some embodiments, the limiting structure may also be a protruding portion disposed on the lock tongue, a blocking portion is disposed on the sliding member corresponding to the protruding portion, and the lock tongue can rotate until the protruding portion abuts against the blocking portion to limit the lock tongue to continue to rotate, so as to limit the rotation angle of the lock tongue, which is not limited herein.

Referring to fig. 1 and 2, in some embodiments, the first elastic restoring element 30 is a second compression spring, one end of which abuts against the sliding element 10 and the other end of which abuts against the lock housing.

Referring to fig. 5, in some embodiments, an end of the sliding member 10 away from the locking tongue 20 is provided with a second limiting hole 13, and an end of the second compression spring close to the sliding member 10 is inserted into the second limiting hole 13 to prevent the second compression spring from moving, so that the second compression spring can stably provide an elastic force to the sliding member 10.

It should be noted that, in some embodiments, the second compression spring may be replaced by a tension spring, one end of the tension spring is connected to the lock case, and the other end of the tension spring is connected to the sliding member, and the second compression spring may be replaced by a rubber band, one end of the rubber band is connected to the lock case, and the other end of the rubber band is connected to the sliding member, which is not limited herein.

Referring to fig. 4 and 6, in some embodiments, the first side 21 and the second side 22 are symmetrically arranged, so that two different door opening modes, namely an inward door opening mode and an outward door opening mode, can be adapted, and the universality is improved.

In some embodiments, a rotating shaft is inserted through the locking tongue 20 and the limiting portion 12, so that the locking tongue 20 is rotatably connected to the sliding member 10.

Referring to fig. 1 and 2, a lock according to an embodiment of the present invention includes the above-mentioned positioning latch bolt assembly.

Furthermore, a guide structure is arranged between the sliding part 10 and the lock shell to limit the moving track of the sliding part 10, which is beneficial to improving the stability of the lockset during operation.

In particular, the guide structure comprises a guide slot 14 and a guide block slidably engaged with the guide slot 14, one of the guide slot 14 and the guide block being arranged on the sliding member 10 and the other being arranged inside the lock housing.

Referring to fig. 7, in some of the embodiments, the guide slot 14 is provided on the sliding member 10 in plural, and the guide block is provided in the lock case in plural correspondingly.

It should be noted that, in some embodiments, the guide block is disposed on the sliding member, and the guide slot is disposed in the lock case, which is not limited herein.

In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", and "some examples", etc., it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A positioning bolt assembly for a lock having a housing, comprising:

a slider (10), said slider (10) being slidably arranged within the housing;

a locking tongue (20), wherein the locking tongue (20) is rotatably connected to the sliding part (10), and the locking tongue (20) is provided with a first side surface (21) facing the door opening direction and a second side surface (22) facing the door closing direction;

the first elastic resetting piece (30) is arranged between the sliding piece (10) and the lock shell, the first elastic resetting piece (30) can provide elastic force for driving the sliding piece (10) to slide and driving the lock tongue (20) to extend out of the lock shell, and the lock tongue (20) can be retracted into the lock shell by overcoming the elastic force of the first elastic resetting piece (30) when external force is applied to the lock tongue (20);

the limiting structure is arranged between the sliding piece (10) and the lock tongue (20) and used for limiting the rotation angle of the lock tongue (20) so that the lock tongue (20) has a first limit position and a second limit position, when the lock tongue (20) rotates to the first limit position, the second side surface (22) is in an inclined state so that the lock tongue (20) can be retracted into the lock shell under the reaction force of a door frame when the door is closed, and when the lock tongue (20) rotates to the second limit position, the first side surface (21) is in an inclined state so that the lock tongue (20) can be retracted into the lock shell under the reaction force of a lock hole when the door is opened;

the locking piece (40) is slidably arranged on the sliding piece (10), the locking piece (40) can limit the locking bolt (20) to rotate so as to lock the locking bolt (20) at a first limit position or a second limit position, and the locking bolt (20) can lock a door body when being locked at the first limit position and positioned in a locking hole;

the second elastic resetting piece (50), the second elastic resetting piece (50) is arranged between the locking piece (40) and the sliding piece (10), the second elastic resetting piece (50) can provide a position for driving the locking piece (40) to slide to limit the rotation of the locking bolt (20), and the locking piece (40) can overcome the elastic force of the second elastic resetting piece (50) to slide when being subjected to external force so as to release the limitation on the locking bolt (20).

2. The positioning bolt assembly according to claim 1, wherein a mounting hole (11) is formed in the sliding member (10) corresponding to the locking member (40), the locking member (40) is slidably inserted into the mounting hole (11), one end of the locking member (40) close to the bolt (20) can extend out of the mounting hole (11) to a rotation path of the bolt (20) under the action of the second elastic reset member (50) to limit the rotation of the bolt (20), and one end of the locking member (40) close to the bolt (20) is in a wedge shape to form a first inclined pushing surface (41) and a second inclined pushing surface (42) which are symmetrical to each other.

3. The positioning bolt assembly according to claim 2, characterized in that the second elastic return element (50) is a first compression spring disposed in the mounting hole (11), one end of the first compression spring abuts against the locking element (40) and the other end abuts against the sliding element (10).

4. The positioning bolt assembly of claim 3, characterized in that the end of the lock bolt (40) far away from the bolt (20) is provided with a first limiting hole (43), and the end of the first compression spring close to the lock bolt (40) is inserted into the first limiting hole (43).

5. The positioning bolt assembly of claim 2, characterized in that the end of the lock bolt (40) near the lock bolt (20) is provided with a first rounded corner (44) and the end of the lock bolt (20) near the lock bolt (40) is provided with a second rounded corner (23).

6. The positioning lock tongue assembly according to claim 1, wherein the limiting structure comprises a limiting portion (12) arranged on the sliding member (10), the limiting portion (12) is arranged at one end of the sliding member (10) close to the lock tongue (20), a chamfer is arranged on the limiting portion (12) to form a first abutting surface (121) and a second abutting surface (122) which are symmetrical to each other, an avoiding groove (24) is arranged on the lock tongue (20) corresponding to the limiting portion (12), the limiting portion (12) is inserted into the avoiding groove (24), and the lock tongue (20) can rotate to enable the avoiding groove (24) to face towards a groove wall (241) of the sliding member (10) to abut against the first abutting surface (121) or abut against the second abutting surface (122).

7. A positioning bolt assembly according to claim 1 characterised in that the first resilient return member (30) is a second compression spring having one end abutting the slider member (10) and the other end abutting the housing.

8. The positioning bolt assembly according to claim 7, characterized in that the end of the sliding element (10) remote from the bolt (20) is provided with a second limiting hole (13), and the end of the second compression spring close to the sliding element (10) is inserted into the second limiting hole (13).

9. The positioning bolt assembly of claim 1, characterized in that the first side (21) and the second side (22) are symmetrically arranged.

10. A lock including a positioning latch bolt assembly according to any one of claims 1 to 9.