CN116201420A - Lockset for side-hung door - Google Patents

Abstract

The invention provides a lock for a swing door, comprising: the lock catch box is provided with a lock groove; the lock shell is provided with a containing cavity and is used for being arranged on a door body of the vertical hinged door; the lock tongue is arranged in the accommodating cavity in a sliding manner; the elastic piece is used for driving the lock tongue by elasticity so that the head end of the lock tongue is clamped in the lock groove; the lock groove is provided with a first guide surface matched with the head end of the lock tongue, and the first guide surface extends from the opening of the lock groove to the inside of the lock groove; when the door body is pushed and pulled, the head end of the lock tongue can move along the first guide surface and retract along the accommodating cavity so as to be separated from the locking groove. The door is provided with the hinge mounting structure, the hinge mounting structure is provided with the hinge mounting structure, and the hinge mounting structure is provided with the hinge mounting structure.

Description

Lockset for side-hung door

Technical Field

The invention relates to the technical field of hardware accessories, in particular to a lock for a vertical hinged door.

Background

When the existing vertical hinged door needs to be opened, a door handle is usually twisted to enable a lock tongue to retract into a lock shell, so that unlocking operation is realized, and then a door body is pulled or pushed to realize opening operation.

However, when the door handle is twisted, it is necessary to push down the door handle, applying a downward pressure to the door body, and pulling or pushing the door body is performed when the door handle is pushed down, that is, when the door is opened, an irregular force is applied to the door body, and after a long time use, the hinge mounting structure of the door body is deformed.

Disclosure of Invention

In order to overcome at least one of the defects in the prior art, the invention provides a lock for a vertical hinged door, which aims to solve the problem that a hinge mounting structure is deformed due to the fact that a door body is stressed in the up-down direction by twisting a door handle when unlocking and opening the door.

The invention adopts the technical proposal for solving the problems that:

a lock for a swing door comprising: the lock catch box is provided with a lock groove; the lock shell is provided with a containing cavity and is used for being arranged on a door body of the vertical hinged door; the lock tongue is arranged in the accommodating cavity in a sliding manner; the elastic piece is used for driving the lock tongue by elasticity so that the head end of the lock tongue is clamped in the lock groove; the lock groove is provided with a first guide surface matched with the head end of the lock tongue, and the first guide surface extends from the opening of the lock groove to the inside of the lock groove; when the door body is pushed and pulled, the head end of the lock tongue can move along the first guide surface and retract along the accommodating cavity so as to be separated from the locking groove.

The lock for the vertical hinged door provided by the invention has the advantages that on one hand, the door opening and closing operation can be faster and more convenient, particularly, when the door is opened, the door handle is not required to be twisted, the lock tongue can retract to complete unlocking only by pushing or pulling the door body in the horizontal direction, similarly, when the door is closed, the door handle is not required to be twisted, the head end of the lock tongue can move along the first guide surface only by pushing or pulling the door body in the horizontal direction, and under the action of the elastic piece, the head end of the lock tongue can be clamped in the lock groove to complete locking; on the other hand, more importantly, because the door handle is not required to be twisted when the door is opened or closed, the door body cannot be stressed in the vertical direction due to the fact that the door handle is twisted, and the door body is simple in stress, so that the hinge mounting structure of the door body is not easy to deform after the door body is used for a long time, and the probability that the door body is inclined to cause looseness and unsmooth opening or closing of the door is greatly reduced.

According to some embodiments of the invention, the first guide surface and/or the head end of the bolt are provided with a rolling structure; the head end of the lock tongue moves on the first guide surface through the rolling structure.

According to some embodiments of the invention, the first guiding surface and/or the end surface of the head end of the lock tongue are arc surfaces.

According to some embodiments of the invention, the opening of the locking groove is provided with a second guiding surface outwards, the second guiding surface is connected to the first guiding surface, and after the front end of the locking bolt is separated from the locking groove, the front end of the locking bolt can move along the second guiding surface.

According to some embodiments of the invention, the second guide surface is coplanar with a plane in which the opening of the locking groove is located.

According to some embodiments of the invention, the second guide surface is connected to a third guide surface, the third guide surface extends away from the front end of the lock tongue, and the front end of the lock tongue can move along the third guide surface after the front end of the lock tongue is separated from the second guide surface.

According to some embodiments of the invention, the rolling structure is a roller or a ball.

According to some embodiments of the invention, the lock further comprises a door handle for being disposed at the door body.

According to some embodiments of the invention, the lock further comprises a counter-locking mechanism for limiting movement of the locking bolt to maintain the locking bolt in a position protruding out of the receiving cavity.

According to some embodiments of the invention, the counter-lock mechanism comprises a drive assembly and a limiting assembly, the drive assembly comprises a pushing member and a rotating rod, the rotating rod is in transmission connection with the limiting assembly, and a first end of the rotating rod is in transmission connection with the pushing member; the rotating rod rotates around the axis of the rotating rod under the drive of the pushing piece; the limiting component can move to a position for limiting the movement of the lock tongue under the driving of the rotating rod.

Drawings

FIG. 1 is a schematic diagram of a lock according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a lock case according to an embodiment of the present invention;

FIG. 3 is a schematic view of a cross-sectional structure of a lock and a door body in a horizontal direction, showing the lock in a closed state;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

FIG. 5 is another schematic cross-sectional view of the lock and door body in a horizontal direction showing the movement of the locking bolt on the second guide surface when the door is opened;

FIG. 6 is a schematic view of another cross-sectional structure of the lock and the door body in a horizontal direction, showing a state in which the tongue moves on the third guide surface when the door is opened;

fig. 7 is a schematic cross-sectional view of the lock and the door body in the horizontal direction, which illustrates a state in which the latch bolt moves to the third guide surface when the door is opened;

FIG. 8 is a schematic view of a locking mechanism according to an embodiment of the present invention;

FIG. 9 is a schematic view of the structure of an inner handle according to an embodiment of the present invention;

FIG. 10 is another schematic view of the lockout mechanism showing the lockout mechanism when the thumb wheel is in the first position, in accordance with an embodiment of the present invention;

FIG. 11 is a further schematic view of the lockout mechanism showing the lockout mechanism when the thumb wheel is in the second position, in accordance with an embodiment of the present invention;

fig. 12 is a schematic structural view of an outer handle according to an embodiment of the present invention.

Wherein the reference numerals have the following meanings:

the door lock comprises a 10-lock catch box, a 101-lock groove, a 11-lock shell, a 111-containing cavity, a 112-mounting groove, a 12-lock tongue, a 13-elastic piece, a 14-first guide surface, a 15-rolling structure, a 16-second guide surface, a 17-third guide surface, a 18-inner handle, a 19-outer handle, a 191-body, a 192-mounting groove, a 193-cover plate, a 194-yielding groove, a 20-inner seat, a 21-outer seat, a 22-pushing piece, a 221-back lock switch, a 23-rotating rod, a 231-boss, a 24-slider, a 241-limiting opening, a 242-connecting section, a 243-extending section, a 25-deflector pulley, a 251-limiting block, a 252-mounting opening, a 26-emergency switch and a 27-door body.

Detailed Description

For a better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 7, the present invention discloses a lock for a side hung door, the lock comprises a lock box 10, a lock shell 11, a lock tongue 12, an elastic member 13 and a first guide surface 14; the lock catch box 10 is provided with a lock groove 101, and the lock catch box 10 is used for being arranged on a door opening frame; the lock shell 11 is provided with a containing cavity 111, and the lock shell 11 is used for being arranged on the door body 27 of the vertical hinged door and moves along with the door body 27; the lock tongue 12 is slidably arranged in the accommodating cavity 111; the elastic piece 13 is used for driving the lock tongue 12 by elastic force, so that the head end of the lock tongue 12 extends out of the accommodating cavity 111 to be clamped in the lock groove 101; the first guiding surface 14 is disposed in the locking groove 101, and the first guiding surface 14 is matched with the head end of the locking bolt 12, specifically, the first guiding surface 14 extends from the opening of the locking groove 101 to the inside of the locking groove 101, and when the door body 27 is pushed and pulled, the head end of the locking bolt 12 can move along the first guiding surface 14 and retract along the accommodating cavity 111 so as to be separated from the locking groove 101.

Specifically, in the present embodiment, the lock further includes a door handle for being provided to the door body 27, through which a user can apply a pushing or pulling force to the door body 27 in a horizontal direction, more specifically, the door handle includes an inner handle 18 for being provided inside the door body 27 and an outer handle 19 for being provided outside the door body 27.

By adopting the above scheme, on one hand, the door opening and closing operation can be faster and more convenient, specifically, when the door is opened, the door handle is not required to be twisted, the lock tongue 12 can be retracted to complete unlocking only by pushing or pulling the door body 27 in the horizontal direction, similarly, when the door is closed, the door handle is not required to be twisted, the head end of the lock tongue 12 can be enabled to move along the first guide surface 14 only by pushing or pulling the door body 27 in the horizontal direction, and under the action of the elastic piece 13, the head end of the lock tongue 12 can be clamped in the lock groove 101 to complete locking; on the other hand, more importantly, because the door handle is not required to be twisted when the door is opened or closed, the door body 27 cannot be stressed in the up-down direction due to the fact that the door handle is twisted, and the stress of the door body 27 is simplified, so that the hinge mounting structure of the door body 27 is not easy to deform after the door body 27 is used for a long time, and the probability of occurrence of the problems of loosening and unsmooth door opening or closing caused by inclination of the door body 27 is greatly reduced.

As shown in fig. 4, further, in this embodiment, in order to reduce the friction between the head end of the lock tongue 12 and the first guiding surface 14, the head end of the lock tongue 12 is provided with a rolling structure 15, and the head end of the lock tongue 12 moves on the first guiding surface 14 through the rolling structure 15, so that rolling friction is formed between the head end of the lock tongue 12 and the first guiding surface 14 through the rolling structure 15, on one hand, structural damage of the head end of the lock tongue 12 and the first guiding surface 14 due to large friction can be avoided, and on the other hand, the head end of the lock tongue 12 can move along the first guiding surface 14 more continuously and smoothly, so that a door can be opened or closed more continuously and smoothly. Preferably, the rolling structure 15 is a roller, and the roller has the advantages of simple structure, easy function realization and low production cost; indeed, in some other embodiments, the rolling structure 15 may be, but is not limited to, a ball.

In some other embodiments, the rolling structure 15 may be disposed at the head end of the lock tongue 12 and the first guiding surface 14, or the rolling structure 15 may be disposed only at the first guiding surface 14, which is selected according to practical requirements.

As shown in fig. 4 and 10, in this embodiment, the first guiding surface 14 and the end surface of the front end of the lock tongue 12 are preferably cambered surfaces, so as to further reduce the friction force when the front end of the lock tongue 12 moves along the first guiding surface 14. Indeed, in some other embodiments, the first guiding surface 14 and the end surface of the head end of the locking bolt 12 may be relatively smooth planes, which may be selected according to practical requirements.

As shown in fig. 2, 4 and 5, further, in this embodiment, the opening of the locking groove 101 is provided with a second guiding surface 16 outwards, the second guiding surface 16 is connected to the first guiding surface 14, and after the front end of the locking bolt 12 is separated from the locking groove 101, the front end of the locking bolt 12 can move along the second guiding surface 16, so that the second guiding surface 16 can provide guiding for the front end of the locking bolt 12 when the locking bolt 12 moves towards the direction approaching the locking groove 101, and can also provide guiding for the front end of the locking bolt 12 when the locking bolt 12 moves towards the direction far from the locking groove 101. Preferably, the second guiding surface 16 is coplanar with the plane where the opening of the locking groove 101 is located, so that the moving track of the head end of the locking bolt 12 between the second guiding surface 16 and the opening of the locking groove 101 is relatively gentle, so that the head end of the locking bolt 12 can stably and smoothly move between the second guiding surface 16 and the opening of the locking groove 101, and the problem that the head end of the locking bolt 12 jumps due to the too steep moving track is avoided, so that the door 27 can stably and smoothly move.

As shown in fig. 2, 4, 6 and 7, further, in this embodiment, the second guide surface 16 is connected to the third guide surface 17, the third guide surface 17 extends in a direction away from the front end of the lock tongue 12, and after the front end of the lock tongue 12 is separated from the second guide surface 16, the front end of the lock tongue 12 can move along the third guide surface 17, so, on one hand, when the lock tongue 12 moves in a direction close to the lock groove 101, the front end of the lock tongue 12 can be quickly guided from the third guide surface 17 to the second guide surface 16, on the other hand, when the lock tongue 12 moves in a direction away from the lock groove 101, the front end of the lock tongue 12 can be quickly moved out of the third guide surface 17 through the extending direction of the third guide surface 17, at this time, the lock tongue 12 can reach a maximum protruding state under the action of the elastic member 13, and the resistance applied when the door body 27 moves is small.

Further, in this embodiment, as shown in fig. 8, the lock further includes a counter-locking mechanism for limiting the movement of the lock tongue 12, so that the lock tongue 12 is kept at a position extending out of the accommodating cavity 111, and thus the door lock is counter-locked when needed, and the door cannot be opened directly by pushing or pulling.

As shown in fig. 8 and 9, preferably, in the present embodiment, the counter lock mechanism includes a driving assembly and a limiting assembly, the driving assembly includes a pushing member 22 and a rotating lever 23, the rotating lever 23 is drivingly connected to the limiting assembly, and a first end of the rotating lever 23 is drivingly connected to the pushing member 22; the pushing piece 22 can slide relative to the lock shell 11; the rotating rod 23 rotates around the axis of the rotating rod under the drive of the pushing piece 22; the restricting component can move to a position restricting the movement of the lock tongue 12 under the driving of the rotating rod 23. Specifically, when the back locking is needed, the pushing piece 22 is slidably arranged on the inner handle 18, and when the back locking is needed, a person in the room can lock the door by pushing the pushing piece 22 to drive the rotating rod 23 to rotate, so that the back locking knob does not need to be twisted during the back locking, and the door body 27 is prevented from being stressed in the up-down direction due to twisting of the back locking knob, so that the aim of further reducing the deformation probability of the hinge mounting structure of the door body 27 is fulfilled.

Indeed, in some other embodiments, the pushing member 22 may be slidably disposed on an inner seat 20 for connecting to the inner handle 18, and the inner seat 20 is fitted inside the door 27.

As shown in fig. 9, in the present embodiment, the pushing member 22 is preferably provided with a counter-lock switch 221, and the counter-lock switch 221 is convexly disposed on a side of the inner handle 18 facing the door body 27, so that, on one hand, the inner handle 18 can be utilized to shield the counter-lock switch 221, so that the whole appearance of the lock is more attractive, and on the other hand, the user can apply force to the counter-lock switch 221 to drive the pushing member 22 to slide, so as to realize counter-lock.

As shown in fig. 8, 10 and 11, further, in this embodiment, the limiting assembly includes a slider 24 and a thumb wheel 25, the slider 24 is connected to the tail end of the lock tongue 12, and the slider 24 and the lock tongue 12 slide synchronously in the lock case 11; the thumb wheel 25 is rotatably arranged on the lock shell 11, the rotating rod 23 is connected with the thumb wheel 25 in a transmission way, and the thumb wheel 25 can rotate between a first position and a second position under the drive of the rotating rod 23; when the thumb wheel 25 is in the first position, the thumb wheel 25 abuts against the sliding block 24 to limit the sliding of the sliding block 24 so as to keep the lock tongue 12 in a position extending out of the accommodating cavity 111; when the thumb wheel 25 is in the second position, the thumb wheel 25 is located outside the movement path of the slider 24 to release the movement restriction of the slider 24, and the latch 12 and the slider 24 can slide in the accommodating chamber 111. So set up, need not set up other meshing structures between thumb wheel 25 and the slider 24, the cooperation relationship of thumb wheel 25 and slider 24 is very simple, only need can realize the removal restriction to slider 24 through the rotation of thumb wheel 25, can not rust or damage and lead to the anti-locking mechanism to become invalid because of meshing structure after long-term use to, the quantity and the kind of spare part of anti-locking mechanism can be reduced, and anti-locking mechanism's overall structure is simplified, has reduced manufacturing cost.

It should be noted that, in some other embodiments, the limiting assembly may also include, but is not limited to, a rack and pinion mechanism including an engagement structure, which is selected according to practical needs and is not limited herein.

Preferably, in the present embodiment, the dial wheel 25 is provided with a linear mounting opening 252, and the rotating rod 23 is inserted into the mounting opening 252 to ensure transmission stability; indeed, in some other embodiments, the mounting opening 252 may be, but is not limited to, cross-shaped, triangular, quadrilateral, etc., without limitation.

Referring to fig. 8, in the present embodiment, preferably, the first end of the rotating rod 23 is provided with an eccentrically disposed boss 231, i.e. the boss 231 is disposed at the first end of the rotating rod 23 and offset from the axis of the rotating rod 23, and the first end of the rotating rod 23 is in driving connection with the pushing member 22 through the boss 231, so that when the pushing member 22 slides linearly, the rotating rod 23 can rotate around its own axis, and similarly, no other engagement structure is required between the pushing member 22 and the rotating rod 23, the rotating rod 23 can rotate around its own axis only by sliding the pushing member 22 linearly, so that the engagement relationship between the pushing member 22 and the rotating rod 23 is very simple, the anti-lock mechanism will not be disabled due to rusting or breakage of the engagement structure after long-term use, and the number and variety of the parts of the anti-lock mechanism can be further reduced, and the overall structure of the anti-lock mechanism can be further simplified, and the production cost can be further reduced.

It should be noted that, in some other embodiments, the driving assembly may be, but not limited to, a rotation driving assembly including an anti-lock knob or an engagement structure, which is selected according to practical needs and is not limited herein.

As shown in fig. 10 and 11, in the present embodiment, the slider 24 is preferably provided with a limiting opening 241, and the thumb wheel 25 is preferably provided with a limiting block 251 matching the limiting opening 241; when the thumb wheel 25 is at the first position, the limiting block 251 is abutted against the limiting opening 241 to limit the sliding of the sliding block 24; when the thumb wheel 25 is at the second position, the limiting block 251 is positioned outside the moving path of the limiting port 241 so as to release the movement limitation of the sliding block 24; like this, through the joint cooperation of spacing mouth 241 and stopper 251, can improve the cooperation stability between slider 24 and the thumb wheel 25, avoid slider 24 and thumb wheel 25 to appear dislocation complex problem to can realize accurate and stable locking to spring bolt 12. Specifically, the abutting surface of the limiting opening 241 and the limiting block 251 is an arc surface, so as to reduce the stress and impact force received when the limiting opening 241 and the limiting block 251 are clamped, and further reduce the mechanical damage generated when the limiting opening 241 and the limiting block 251 are matched.

Specifically, in the present embodiment, the slider 24 includes a connection section 242 and an extension section 243, the connection section 242 is used for connecting the lock tongue 12, one end of the extension section 243 is connected to the connection section 242, and the other end of the extension section 243 is provided with a limiting opening 241, so, since the limiting opening 241 is provided at the end of the extension section 243, the interference of other structures on the slider 24 can be reduced, so that the limiting opening 241 and the limiting block 251 can be more easily and accurately matched. More specifically, in the present embodiment, the accommodating cavity 111 is provided with the mounting groove 112, one end of the elastic member 13 abuts against the connecting section 242, and the other section of the elastic member 13 abuts against the mounting groove 112.

Preferably, in the present embodiment, in order to further improve stability and accuracy of movement restriction of the lock tongue 12, two extending sections 243 are provided, two limiting blocks 251 are provided, the two extending sections 243 are oppositely disposed, and when the thumb wheel 25 is in the first position, the two limiting blocks 251 are in one-to-one correspondence with the limiting openings 241 on the two extending sections 243.

Further, as shown in fig. 12, in this embodiment, the lock is further provided with an emergency switch 26, where the emergency switch 26 is disposed on the outer handle 19 to provide a means for unlocking when a person in the room is unexpected, specifically, the outer handle 19 includes a body 191 and a cover plate 193, the body 191 is formed with a mounting cavity 192, the emergency switch 26 is disposed in the mounting cavity 192, and the emergency switch 26 can drive the thumb wheel 25 to rotate, and the cover plate 193 is disposed in the mounting cavity 192 to shield the emergency switch 26. More specifically, the emergency switch 26 is a key hole into which a key is inserted, and the key hole is connected to the second end of the rotation rod 23, so that the key is inserted into the key hole and twisted to rotate the rotation rod 23 to realize emergency unlocking.

In some other embodiments, the emergency switch 26 may be disposed on the outer seat 21 for connecting the outer handle 19, which is selected according to practical needs.

Preferably, in the present embodiment, the cover plate 193 is magnetically attracted to the mounting cavity 192, and a relief groove 194 is formed between the first end of the cover plate 193 and the mounting cavity 192, such that when the first end of the cover plate 193 is pressed, the second end of the cover plate 193 can be tilted to expose the key hole for inserting the key.

In summary, the lock for the vertical hinged door disclosed by the invention at least has the following beneficial technical effects:

1) When the door is opened and closed, the door handle is not required to be twisted, the door body 27 is not stressed in the up-down direction due to the fact that the door handle is twisted, and the door body 27 is simple in stress, so that the hinge mounting structure of the door body 27 is not easy to deform after the door body 27 is used for a long time, the probability of loosening caused by the inclination of the door body 27 and unsmooth door opening and closing is greatly reduced, and the door opening and closing operation is faster and more convenient;

2) The rolling structure 15 can enable the head end of the lock tongue 12 to move along the first guide surface 14 more continuously and smoothly, so that the door is opened and closed more continuously and smoothly;

3) The second guiding surface 16 is coplanar with the plane where the opening of the locking groove 101 is located, so that the moving track of the head end of the lock tongue 12 between the second guiding surface 16 and the opening of the locking groove 101 is gentle, the problem that the head end of the lock tongue 12 jumps due to the fact that the moving track is too steep is avoided, and the door body 27 can move stably and smoothly;

4) The back locking knob is not required to be twisted during back locking, so that the door body 27 is prevented from being stressed in the up-down direction due to the twisting of the back locking knob, and the aim of further reducing the probability of deformation of a hinge mounting structure of the door body 27 is fulfilled.

The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features. It should be noted that modifications and adaptations to the invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (10)

1. A lock for a swing door comprising:

a lock catch box (10) provided with a lock groove (101);

a lock shell (11) provided with a containing cavity (111), wherein the lock shell (11) is used for being arranged on a door body (27) of the vertical hinged door;

the lock tongue (12) is arranged in the accommodating cavity (111) in a sliding manner;

the elastic piece (13) is used for elastically driving the lock tongue (12) so that the head end of the lock tongue (12) is clamped in the locking groove (101);

the lock groove (101) is provided with a first guide surface (14) matched with the head end of the lock tongue (12), and the first guide surface (14) extends from an opening of the lock groove (101) to the inside of the lock groove (101); when the door body (27) is pushed and pulled, the head end of the lock tongue (12) can move along the first guide surface (14) and retract along the accommodating cavity (111) so as to be separated from the locking groove (101).

2. Lockset according to claim 1, characterized in that the first guiding surface (14) and/or the head end of the bolt (12) is provided with a rolling structure (15); the head end of the lock tongue (12) moves on the first guide surface (14) through the rolling structure (15).

3. Lockset according to claim 2, characterized in that the end face of the first guide surface (14) and/or the head end of the bolt (12) is an arc surface.

4. A lock according to any one of claims 1-3, wherein the opening of the locking groove (101) is provided with a second guiding surface (16) outwards, the second guiding surface (16) is connected to the first guiding surface (14), and the front end of the locking bolt (12) is movable along the second guiding surface (16) after the front end of the locking bolt (12) is separated from the locking groove (101).

5. The lock according to claim 4, characterized in that the second guide surface (16) is coplanar with the plane of the opening of the locking groove (101).

6. The lock according to claim 5, characterized in that the second guiding surface (16) is connected with a third guiding surface (17), the third guiding surface (17) extends in a direction away from the head end of the lock tongue (12), and the head end of the lock tongue (12) is movable along the third guiding surface (17) after the head end of the lock tongue (12) is separated from the second guiding surface (16).

7. A lock according to claim 2 or 3, wherein the rolling structure (15) is a roller or a ball.

8. The lock according to claim 1, further comprising a door handle for being provided to the door body (27).

9. The lock according to claim 1 or 2 or 3 or 5 or 6 or 8, further comprising a counter-locking mechanism for limiting the movement of the bolt (12) so as to keep the bolt (12) in a position protruding outside the housing cavity (111).

10. The lock according to claim 9, wherein the counter-locking mechanism comprises a drive assembly and a limiting assembly, the drive assembly comprising a pusher (22) and a turning lever (23), the turning lever (23) being drivingly connected to the limiting assembly, and a first end of the turning lever (23) being drivingly connected to the pusher (22); the rotating rod (23) rotates around the axis of the rotating rod under the drive of the pushing piece (22); the limiting component can move to a position for limiting the movement of the lock tongue (12) under the driving of the rotating rod (23).

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