CN217001282U - Spring bolt subassembly and lock - Google Patents

Abstract

The utility model provides a lock tongue assembly and a door lock, wherein the lock tongue assembly is at least partially arranged in a shell of the door lock, the lock tongue assembly comprises a lock tongue support and a lock tongue, the lock tongue support is in sliding connection with the shell, the lock tongue is arranged on the lock tongue support and can rotate around the lock tongue support, the upper surface and/or the lower surface of the lock tongue support extends towards the shell to form at least two protruding parts which are arranged in parallel, a guide groove is formed between every two adjacent protruding parts, a guide rib matched with the guide groove is formed on the shell, and the guide rib can guide the lock tongue support to slide relative to the shell. The bolt assembly realizes the sliding guide of the guide rib to the bolt bracket by arranging the guide rib and the guide groove which can slide along the guide rib; all set up the direction recess through setting up at the upper and lower surface of spring bolt support, improved the stability of guide bracket for the casing to improve the theftproof performance of lock, further improved the life of lock.

Description

Spring bolt subassembly and lock

Technical Field

The utility model relates to the field of locks, in particular to a lock tongue assembly and a door lock.

Background

Along with the continuous development of science and technology, the lock has also had very big development, and intelligence lock is in due transit, compares in traditional mechanical lock, and intelligence lock is more intelligent in user identification, security, managerial aspect, has security, convenience.

The lock tongue is a common structure in the lockset, the lock tongue can not only independently complete the opening and closing of the door lock, but also can be matched with other types of locking structures such as a square tongue and the like, and the anti-theft performance of the lockset is improved. The existing latch bolt generally comprises a bracket and a scissor bolt arranged on the bracket, and the extension and retraction of the scissor bolt are realized through the sliding of the bracket. However, in current lock, the connection between support and the casing is unstable, leads to the spring bolt to take place to rock for the casing for the theftproof performance of lock reduces, in the use, influences user's use and experiences, and is further, has reduced the life of lock.

Accordingly, there is a need for a latch bolt assembly and a door lock to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a bolt assembly with good stability so as to solve the problem that the connection between a bracket and a shell in the existing door lock is unstable.

In order to achieve the above purpose, the utility model provides a lock tongue assembly, which is at least partially installed in a shell of a door lock, wherein the lock tongue assembly comprises a lock tongue support and a lock tongue, the lock tongue support is slidably connected with the shell, the lock tongue is installed on the lock tongue support and can rotate around the lock tongue support, the upper surface and/or the lower surface of the lock tongue support extends towards the direction of the shell to form at least two protruding parts which are arranged in parallel, a guide groove is formed between every two adjacent protruding parts, a guide rib matched with the guide groove is formed on the shell, and the guide rib can guide the lock tongue support to slide relative to the shell.

As a further improvement of the present invention, the upper surface and the lower surface of the latch bolt support are both provided with two parallel protrusions, the latch bolt support further includes a stopper connected to the ends of the two protrusions, the guide rib extends from the housing toward the latch bolt support, the guide rib is accommodated in the guide groove and can slide in the guide groove, and one end of the guide rib can abut against the stopper to limit the movement of the latch bolt support.

As a further improvement of the present invention, the door lock includes a limiting element, the lock tongue support extends in a direction perpendicular to the movement direction of the lock tongue to form a limiting portion, an abdicating space is formed between the limiting portion and the lock tongue support, and at least part of the limiting element is accommodated in the abdicating space.

As a further improvement of the utility model, one end of the limiting part close to the lock tongue is provided with a matching part matched with the lock tongue in shape, and one end of the limiting part far away from the matching part is abutted against at least part of the limiting part.

As a further improvement of the utility model, the matching part is an arc-shaped surface perpendicular to the bolt support, and the end surface of the limiting part far away from one end of the matching part is a plane perpendicular to the bolt support.

As a further improvement of the present invention, a front end surface is provided on the lock tongue support, the lock tongue includes a contact portion that contacts with the front end surface, the contact portion includes a first contact surface and a second contact surface that are arranged at an included angle, and the first contact surface and the second contact surface alternately abut against the front end surface when the lock tongue rotates around the lock tongue support.

As a further improvement of the present invention, the first contact surface is parallel to the front end surface, the second contact surface is inclined in a direction away from the front end surface, and an included angle between the first contact surface and the second contact surface is an obtuse angle.

As a further improvement of the present invention, the lock tongue includes a lock catch end located in front of the lock tongue support, the contact portion is disposed at one end of the lock catch end close to the lock tongue support, the lock catch end includes a first mating surface and a second mating surface, an included angle between the first mating surface and the second mating surface is an acute angle, the first mating surface is connected to the first contact surface, and the second mating surface is connected to the second contact surface.

As a further improvement of the present invention, the first contact surface and the first matching surface are arranged at a right angle, and the second contact surface and the second matching surface are arranged at a right angle.

The second purpose of the utility model is to provide a door lock with the bolt assembly.

In order to achieve the purpose, the utility model further provides a door lock, which comprises a shell and the bolt assembly, wherein an opening is formed in the peripheral wall of the shell corresponding to the bolt assembly, and the bolt extends out of the shell through the opening.

The utility model has the beneficial effects that: the lock tongue component realizes the sliding guide of the guide rib on the lock tongue support through the arrangement of the guide rib and the guide groove capable of sliding along the guide rib; all set up the direction recess through setting up at the upper and lower surface of spring bolt support, improved the stability of guide bracket for the casing to improve the theftproof performance of lock, further improved the life of lock.

Drawings

Fig. 1 is a perspective view of a door lock according to a preferred embodiment of the present invention.

Figure 2 is another perspective view of the door latch of figure 1.

Fig. 3 is a perspective view of the housing of fig. 2.

Figure 4 is a cross-sectional view of the door lock of figure 1.

Fig. 5 is an enlarged partial view of the latch bolt assembly shown in fig. 4.

FIG. 6 is a perspective view of the latch assembly of FIG. 4.

FIG. 7 is a schematic perspective view of another angle of the latch assembly of FIG. 6.

Fig. 8 is an exploded view of the latch bolt assembly of fig. 6.

Fig. 9 is a perspective view of the deadbolt bracket of fig. 8.

Fig. 10 is a perspective view of the locking bolt of fig. 8.

Fig. 11 is another perspective view of the locking bolt of fig. 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.

In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1 to 5, a door lock 100 according to a preferred embodiment of the present invention includes a housing 10, a latch bolt assembly 20, and a position limiter 30. Bolt assembly 20 is at least partially installed in casing 10 of lock 100, and locating part 30 sets up in casing 10, and the one end of locating part 30 can be with bolt assembly 20 butt for make bolt 22 of bolt assembly 20 keep stretching out the state of casing 10, so set up, with bolt 22 spacing the fixing outside casing 10 of bolt assembly 20. When the door is in a closed state, the latch bolt 22 is used for abutting against a lock hole (not shown) of a door frame, and the limiting member 30 is kept in an abutting state with the latch bolt assembly 20, so that the door is kept in a closed state and cannot be opened; when the door is in the open position, locking bolt 22 extends out of housing 10 and remains extended under the abutment of stop 30 and locking bolt assembly 20, so that the door remains open and does not close, to accommodate the user's requirements for door lock 100.

The housing 10 includes a first side wall 11 and a second side wall 12 disposed opposite to each other, and a peripheral wall 13 connecting the first side wall 11 and the second side wall 12, the first side wall 11, the second side wall 12 and the peripheral wall 13 enclose to form an accommodating space 14, and the latch bolt assembly 20 is at least partially accommodated in the accommodating space 14 and slidably connected to the housing 10.

The housing 10 is provided with an opening 1311 at a position corresponding to the latch bolt assembly 20, the peripheral wall 13 includes a front peripheral wall 131 and a side peripheral wall 132, and the front peripheral wall 131 and the side peripheral wall 132 are fixedly connected. The opening 1311 is provided on the front circumferential wall 131 of the housing 10, and the locking bolt 22 of the locking bolt assembly 20 can extend or retract into the receiving space 14 through the opening 1311, so that the locking bolt assembly 20 has a locked state and an unlocked state. When the latch tongue 22 of the latch tongue assembly 20 extends out of the receiving space 14 through the opening 1311, the latch tongue 22 may abut against a sidewall of a lock hole on a door frame, and the latch tongue assembly 20 is in a locked state or a free state. When locking bolt 22 of locking bolt assembly 20 is retracted into receiving space 14 through opening 1311, locking bolt 22 is separated from the lock hole of the door frame, and locking bolt assembly 20 is in the unlocked state.

The casing 10 is provided with the guide rib 15, specifically, the guide rib 15 is formed by extending from the outer side wall of the casing 10 towards the accommodating space 14, and the guide rib 15 and the casing 10 are integrally extruded and formed by an extrusion process, the process is simple, meanwhile, the back surface of the guide rib 15 is a blind hole, namely, the guide rib 15 is not broken or penetrates through the casing 10 when being formed, so that dust is prevented from entering the casing 10, and the dustproof effect of the casing 10 is improved, the guide rib 15 is integrally arranged in a strip shape and is vertical to the front circumferential wall 131, of course, in other embodiments, the guide rib 15 can be arranged in a split manner, and can also be only a protruding block.

In this embodiment, the first side wall 11 and the second side wall 12 are provided with the guide ribs 15 on both sides close to the accommodating space 14, and the number of the guide ribs 15 on the first side wall 11 and the second side wall 12 is one, however, in other embodiments, the guide ribs 15 may be provided only on the first side wall 11 or the second side wall 12, and the number of the guide ribs 15 may be set according to actual situations.

Referring to fig. 6 to 11, a latch bolt assembly 20 according to a preferred embodiment of the present invention includes a latch bolt bracket 21, a latch bolt 22 and an elastic member 23. Bolt support 21 is slidable relative to housing 10 to extend or retract bolt 22 into receptacle 14. Bolt 22 is mounted on bolt support 21 and can rotate relative to bolt support 21, so that bolt support 21 and bolt 22 move synchronously, and bolt 22 can extend out of or retract into accommodating space 14 conveniently.

The elastic element 23 elastically abuts against the latch bolt support 21 and enables the latch bolt 22 to extend out of the housing 10 in a free state, specifically, one end of the elastic element 23 abuts against one end of the latch bolt support 21, which is far away from the latch bolt 22, and the other end abuts against the housing 10. In a free state, the elastic piece 23 pushes the bolt bracket 22 to extend out of the accommodating space 14; under the condition of external force, namely in the process of opening or closing the door, the bolt support 22 is stressed to retract into the accommodating space 14, and the bolt support 22 compresses the elastic element 23, so that the elastic element 23 is elastically deformed to generate elastic potential energy; when the external force is removed, i.e. the door opening or closing action is completed, elastic member 23 releases the elastic potential energy to push bolt support 22 to extend outward from receiving space 14.

Preferably, the elastic element 23 is a torsion spring, a fixing column 16 for fixing the torsion spring 23 is arranged on the casing 22, the fixing column 16 is arranged between the bolt support 22 and the side circumferential wall 132, one end of the torsion spring 23 abuts against the bolt support 22, and the other end abuts against the side circumferential wall 132 of the casing 22, of course, in other embodiments, the elastic element 23 may also be a spring, the fixing column 16 is arranged at one end of the bolt support 22 far away from the front circumferential wall 131, one end of the spring abuts against the bolt support 22, and the other end abuts against the fixing column 16, the elastic element 23 may also be a tension spring, one end of the tension spring is connected with one side of the bolt support 22 far away from the front circumferential wall 131, and the other end of the tension spring is connected with the front circumferential wall 131.

Referring to fig. 6 to 9, a latch bolt bracket 21 is used to mount a latch bolt 22, and enables the latch bolt 22 to rotate relative to the latch bolt bracket 21. The bolt support 21 comprises a protruding portion 211, a guide groove 2111, a stop 2112, a limiting portion 214, a front end surface 215, a through hole 216, a rotating shaft 217 and an abutting groove 218, wherein the protruding portion 211, the guide groove 2111 and the stop 2112 are all arranged on the upper surface 212 and/or the lower surface 213 of the bolt support 21, the limiting portion 214 is arranged on the side surface of the bolt support 21, and the front end surface 215 is arranged on one side of the bolt support 21 close to the front peripheral wall 131. The abutting groove 218 is provided on the side of the tongue holder 21 away from the front peripheral wall 131, and one end of the elastic member 23 is accommodated in the abutting groove 218 and the other end abuts against the side peripheral wall 132, thereby abutting the elastic member 23 against the tongue holder 21. Through hole 216 and pivot 217 locate between front end face 215 and spacing portion 214, and pivot 217 is acceptd in through hole 216, and spring bolt 22 is connected with spring bolt support 21 through pivot 217, and spring bolt 22 can rotate for pivot 217, realizes that spring bolt 22 rotates for spring bolt support 21.

The protruding portion 211 is disposed on the upper surface 212 and/or the lower surface 213 of the latch bolt bracket 21 and extends from the latch bolt bracket 21 toward the housing 10, at least two adjacent protruding portions 211 are formed on the upper surface 212 and/or the lower surface 213 of the protruding portion 211, and the adjacent protruding portions 211 are parallel to each other, and a guide groove 2111 is formed between the adjacent protruding portions 211. Preferably, two protrusions 211 are provided on the upper surface 212 and the lower surface 213 and are parallel to each other, that is, one guide groove 2111 is provided on each of the upper surface 212 and the lower surface 213, however, in other embodiments, the protrusions 211 may be provided only on the upper surface 212 or the lower surface 213, and the number of the protrusions 211 may be set according to the actual situation.

The guide groove 2111 is disposed corresponding to the guide rib 15, the guide rib 15 is received in the guide groove 2111, and the guide groove 2111 can slide relative to the guide rib 15, so that the guide rib 15 guides the sliding direction of the guide groove 2111, further, the first side wall 11 and the second side wall 12 of the housing 10 are both provided with the guide rib 15, and the upper surface 212 and the lower surface 213 of the guide bracket are both provided with the guide groove 2111 corresponding to the guide rib 15. In the use, the upper and lower surface of spring bolt support 21 all passes through the spacing sliding connection of direction recess 2111 and direction rib 15 and casing 10 to improve the sliding stability between spring bolt support 21 and the casing 10, avoid spring bolt support 21 to produce for casing 10 and rock in the use, improved lock 100's theftproof performance, further, extension lock 100's life has improved user's use experience. Of course, in other embodiments, the positions of the guide grooves 2111 and the guide ribs 15 may be replaced, that is, the guide grooves 2111 are provided on the housing 10, and the guide ribs 15 are provided on the tongue support 21, so that the guide ribs 15 are received in the guide grooves 2111 and can slide along the guide grooves 2111.

The stopper 2112 is disposed at one end of the latch bolt bracket 21 close to the latch bolt 22, specifically, the stopper 2112 is connected to the ends of two adjacent protrusions 211, and the stopper 2112 can block the guide groove 2111, that is, the stopper 2112 and two adjacent protrusions 211 together enclose the guide groove 2111. When the latch bolt support 21 retracts into the accommodating space 14, the guide groove 2111 slides relative to the guide rib 15 until one end of the guide rib 15 abuts against the stop 2112, so as to limit the latch bolt support 21 to continue moving, i.e., the latch bolt support 21 reaches the maximum retraction into the accommodating space 14, so that the guide rib 15 is prevented from being separated from the guide groove 2111, other elements in the accommodating space 14 are protected, and damage to other elements caused by the excessively-retracted extent of the latch bolt support 21 is avoided. Of course, in other embodiments, the stops 2112 may be disposed at both ends of the protrusion 211, and the guide rib 15 abuts against the stops 2112 to limit the maximum extension and retraction of the latch bolt bracket 21; the latch bolt support 21 may not be provided with the stop 2112, and the latch bolt support 21 may be maximally retracted by using the elastic potential energy of the elastic member 23.

The tongue support 21 extends in a direction perpendicular to the movement direction of the tongue 22 to form a limiting portion 214, the limiting portion 214 includes a matching portion 2142 and a space 2141, and the matching portion 2142 and the space 2141 are respectively disposed on two sides of the limiting portion 214. Specifically, the matching portion 2142 is disposed on one side of the limiting portion 214 close to the front peripheral wall 131, and the shape of the matching portion 2142 matches the shape of the locking tongue 22, so that the locking tongue 22 contacts with the matching portion 2142 and can rotate relative to the matching portion 2142. The engaging portion 2142 is an arc surface facing the front wall 131 and perpendicular to the latch bolt holder 21 to match the latch bolt 22 and allow the latch bolt 22 to rotate therein.

The end face of the end of the limiting portion 214, which is far away from the matching portion 2142, is a plane, the plane is perpendicular to the bolt support 21 and forms a rectangular abdicating space 2141 with the bolt support 21, so as to increase the contact area between the limiting member 30 and the limiting portion 214, on one hand, the limiting member 30 is prevented from moving due to the extrusion of the bolt support 21, the safety performance of the door lock 100 is improved, and on the other hand, the contact area is increased, so as to prolong the service life of the limiting member 30 and the limiting portion 214. Specifically, the yielding space 2141 can give way to the limiting member 30, the limiting member 30 of the door lock 100 is rotatably connected in the accommodating space 14 of the housing 10, and when one end of the limiting member 30 is accommodated in the yielding space 2141 and abuts against the limiting portion 214 of the latch bolt assembly 20, the latch bolt bracket 21 cannot slide relative to the housing 10, so that the latch bolt 22 keeps a state of extending out of the housing 10, namely a locking state; when one end of the limiting member 30 is not abutted against the limiting portion 214 of the latch bolt assembly 20 and is away from the receding space 2141, the latch bolt bracket 21 can slide relative to the housing 10, so that the latch bolt bracket 21 and the latch bolt 22 can retract into the accommodating space 14, i.e., an unlocked state.

Referring to fig. 6 to 8 in combination with fig. 10 and 11, two lock tongues 22 are provided, and the two lock tongues 22 are rotatably connected to two sides of the lock tongue support 21 and are staggered with respect to the central axis of the lock tongue support 21, that is, in the embodiment, the lock tongues 22 are scissor tongues, and the two lock tongues 22 are rotatably connected to the lock tongue support 21 through a rotating shaft 217.

Deadbolt 22 includes a latching end 222 that extends out of housing 10 and a connecting end 223 that is received within housing 10. The locking end 222 is formed by extending the end of the lock tongue 22 away from the tongue support 21, and the locking end 222 can extend out of the housing 10 and abut against the lock hole of the door frame, i.e. a locking state. Connecting end 223 is connected with spring bolt support 21 through pivot 217 on the one hand to realize that spring bolt 22 can rotate for spring bolt support 21, on the other hand and cooperation portion 2142 contact and can rotate in cooperation portion 2142, realize when spring bolt 22 receives external force, spring bolt 22 can transmit some external force to cooperation portion 2142, in order to alleviate the atress of pivot 217, prolong the life of pivot 217.

The locking end 222 includes a first mating surface 2221, a second mating surface 2222, and a contact portion 221, the contact portion 221 is connected to the first mating surface 2221 and the second mating surface 2222, and ends of the first mating surface 2221 and the second mating surface 2222, which are away from the contact portion 221, are connected at an acute angle, specifically, the first mating surface 2221 is a straight surface, and the second mating surface 2222 is an inclined surface. When the second mating surfaces 2222 of the two locking tongues 22 are opposite to each other, and the two first mating surfaces 2221 are partially abutted against the opening 1311 of the housing 10, the shape of scissors is maintained, so that the scissors can be in interference fit with the locking holes in the door frame, and the door can be kept closed.

The contact portion 221 is disposed at a middle position of the lock tongue 22 and abuts against the front end surface 215 of the lock tongue support 21, wherein the contact portion 221 includes a first contact surface 2211, a second contact surface 2212 and an abutting portion 2213, one end of the first contact surface 2211 is connected to the abutting portion 2213, the other end is connected to the first mating surface 2221 perpendicularly, one end of the second contact surface 2212 is connected to the abutting portion 2213, and the other end is connected to the second mating surface 2222 perpendicularly, specifically, the first contact surface 2211 is parallel to the front end surface 215, the second contact surface 2212 is inclined in a direction away from the front end surface 215, and an included angle between the first contact surface 2211 and the second contact surface 2212 is an obtuse angle.

When the tongue 22 rotates around the tongue holder 21, the abutting portion 2213 abuts on the front end surface 215, and the first contact surface 2211 and the second contact surface 2212 alternately abut on the front end surface 215 centering on the abutting portion 2213, that is, when the tongue 22 rotates with respect to the tongue holder 21, the contact portion 221 is changed from the abutment of the first contact surface 2211 (or the second contact surface 2212) on the front end surface 215 to the abutment of the second contact surface 2212 (or the first contact surface 2211) on the front end surface 215.

The connection end 223 is connected to the tongue support 21 through the rotation shaft 217. Link 223 is received in casing 10, and link 223 extends to being perpendicular to the direction of motion of tongue 22 and is formed with fender position 2231, and fender position 2231 is configured as the spacing bolt subassembly 20 and is received in casing 10 at least partially, avoids bolt support 21 all to stretch out of casing 10.

Two abutting surfaces 2232 are provided on a side of the stopper portion 2231 close to the front peripheral wall 131 of the housing 10, and the abutting surfaces 2232 are parallel to the front peripheral wall 131 of the housing 10 and abut against the front peripheral wall 131 to adjust a direction of the latch 22 in a free state, so as to prevent the latch 22 from freely rotating relative to the latch bracket 21, thereby further improving a connection stability between the latch 22 and the door frame. Specifically, in the free state, latch tongue 22 is extended outward by the elastic force of elastic member 23, so that two abutting surfaces 2232 abut against front peripheral wall 131, respectively, first contact surface 2211 of latch tongue 22 abuts against front end surface 215, that is, two latch tongues 22 are in a scissor shape, and first mating surfaces 2221 of two latch tongues 22 abut against both sides of opening 1311, respectively.

In summary, the latch bolt assembly 20 of the present invention realizes the sliding guidance of the guide rib 15 to the latch bolt bracket 21 by providing the guide rib 15 and the guide groove 2111 capable of sliding along the guide rib 15; the guide grooves 2111 are formed in the upper surface 213 and the lower surface of the bolt support 21, so that the stability of the guide support relative to the shell 10 is improved, the anti-theft performance of the door lock 100 is improved, and the service life of the door lock 100 is further prolonged; the limit of the sliding of the bolt bracket 21 is realized by arranging a stop 2112 on the bolt bracket 21 to limit the retraction distance of the bolt bracket 21, and other internal elements are protected; the end surface of one end of the limiting part 214 far away from the matching part 2142 is set to be a plane, so that the contact area between the limiting part 30 and the limiting part 214 is increased, and the safety performance and the service life of the door lock 100 are improved; the dustproof effect of the shell 10 is improved by integrally extruding the guide rib 15 and the shell 10 and forming the back of the guide rib 15 as a blind hole.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides a bolt assembly, at least part installs in the casing of lock, its characterized in that: the spring bolt subassembly includes spring bolt support and spring bolt, spring bolt support with casing sliding connection, the spring bolt is installed on the spring bolt support and can round the spring bolt support rotates, the upper surface and/or the lower surface of spring bolt support towards the direction of casing extends the bulge that forms two at least parallel arrangement, adjacent two be formed with the direction recess between the bulge, be formed with on the casing with direction recess assorted direction rib, the direction rib can guide the spring bolt support for the casing slides.

2. The latch bolt assembly of claim 1, wherein: the upper surface and the lower surface of spring bolt support all are equipped with two parallel arrangement's bulge, spring bolt support is still including connecting two the terminal dog of bulge, the direction rib certainly the casing orientation spring bolt support extends, the direction rib is acceptd in the direction recess and can slide in the direction recess, the one end of direction rib can with the dog butt, in order to restrict spring bolt support's removal.

3. The latch bolt assembly of claim 1, wherein: the lock includes the locating part, the spring bolt support is to the perpendicular to the direction of motion of spring bolt extends and is formed with spacing portion, spacing portion with be formed with the space of stepping down between the spring bolt support, the locating part is acceptd at least partially in the space of stepping down.

4. The latch bolt assembly of claim 3, wherein: the limiting portion is close to one end of the lock tongue and is provided with a matching portion matched with the shape of the lock tongue, and one end of the limiting portion far away from the matching portion is abutted to at least part of the limiting portion.

5. The latch bolt assembly of claim 4, wherein: the cooperation portion is perpendicular to the arcwall face of spring bolt support, the terminal surface that spacing portion kept away from the one end of cooperation portion is perpendicular to the plane of spring bolt support.

6. The latch bolt assembly of claim 1, wherein: the last preceding terminal surface that is equipped with of spring bolt support, the spring bolt include with the contact site of preceding end face contact, the contact site includes first contact surface and the second contact surface that the contained angle set up, the spring bolt round when the spring bolt support rotates, first contact surface and second contact surface with preceding terminal surface is the butt by turns.

7. The latch bolt assembly of claim 6, wherein: the first contact surface with the preceding terminal surface is parallel, the second contact surface is towards keeping away from the direction slope of preceding terminal surface, first contact surface with contained angle between the second contact surface is the obtuse angle.

8. The latch bolt assembly of claim 6, wherein: the spring bolt is including being located lock catch end in spring bolt support the place ahead, the contact site sets up lock catch end is close to spring bolt support's one end, lock catch end includes first fitting surface and second fitting surface, first fitting surface with contained angle between the second fitting surface is the acute angle, just first fitting surface with first contact surface is connected, the second fitting surface with the second contact surface is connected.

9. The latch bolt assembly of claim 8, wherein: the first contact surface and the first matching surface are arranged at a right angle, and the second contact surface and the second matching surface are arranged at a right angle.

10. A door lock characterized by: the lock bolt assembly of any one of claims 1-9, and a housing, wherein an opening is provided in a peripheral wall of the housing at a position corresponding to the lock bolt assembly, and the lock bolt extends out of the housing through the opening.

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