A latch assembly and a lock

Abstract

This utility model discloses a latch assembly and a lock. The latch body can be extended by a latch elastic element, and the driving mechanism can retract the latch body by a swing arm. The latch body is installed into the latch hole through a latch mounting seat. Since the latch mounting seat is provided with a pivot limiting groove, and the pivot limiting groove extends through the latch mounting seat in the front-to-back direction, the rotating shaft can directly pass through the latch mounting seat. The rotating shaft can also be auxiliaryly limited by the bottom wall of the pivot limiting groove. The opening of the pivot limiting groove extends towards the opening of the latch hole and extends through to one side of the latch mounting seat, so that the latch mounting seat does not need to be produced by side core pulling, thereby reducing the production cost of the latch assembly. The rotating shaft only needs to pass through the pivot mounting hole on the lock shell, which reduces the installation difficulty of the rotating shaft and thus reduces the assembly difficulty of the latch assembly.

Description

Technical Field

[0001] This utility model relates to door locks, and in particular to a latch assembly and lock. Background Technology

[0002] Some existing locks have a bolt assembly comprising a lock case, a bolt mounting base, a bolt mechanism, and a drive mechanism. The lock case has a bolt hole with a first pivot mounting hole in its wall. The bolt mounting base has a second pivot mounting hole and is mounted at the bottom of the bolt hole. The bolt mechanism includes a bolt body, a bolt spring, a swing arm, and a rotating shaft. The bolt body is retractably mounted on the bolt mounting base. The rotating shaft passes through the first and second pivot mounting holes. The swing arm is pivotally connected to the first rotating shaft, which, in turn, passes through both holes. This allows the first rotating shaft to help limit the position of the bolt mounting base relative to the bolt hole and to allow the swing arm to swing. The bolt spring can drive the bolt body to extend, and the drive mechanism, in conjunction with the swing arm, can drive the bolt body to retract. Currently, bolt mounting bases are typically made of plastic. The structure of the second pivot mounting hole requires a side-pulling method for production, resulting in higher production costs and relatively difficult assembly. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a locking tongue assembly that can reduce production costs and assembly difficulty.

[0004] This utility model also proposes a lock having the above-mentioned latch assembly.

[0005] According to a first aspect of the present invention, a latch assembly includes a lock housing, a latch mounting base, a latch mechanism, and a drive mechanism. The lock case has a latch hole along the left-right direction, and the wall of the latch hole has a pivot mounting hole. A latch mounting seat is disposed at the bottom of the latch hole, and the latch mounting seat has a pivot limiting groove that extends through the latch mounting seat along the front-back direction. The opening of the pivot limiting groove faces the opening of the latch hole and extends through to the outer wall of the latch mounting seat. A latch mechanism is disposed on the latch mounting seat, and the latch mechanism includes a latch body, a latch elastic element, a swing arm, and a rotating shaft. The latch body is retractably disposed on the latch mounting seat, and the latch elastic element is used to drive the latch body to extend. The swing arm is pivotally connected to the rotating shaft, and the rotating shaft is disposed along the front-back direction and passes through the pivot limiting groove. The end of the rotating shaft is inserted into the pivot mounting hole, and one end of the swing arm is in transmission engagement with the latch body. A drive mechanism is disposed on the lock case and can drive the latch body to retract via the swing arm.

[0006] According to the first aspect of the present invention, the latch assembly has at least the following advantages: the latch body can be extended by the latch elastic element, and the driving mechanism can drive the latch body to retract by the swing arm. The latch body is installed into the latch hole through the latch mounting seat. Since the latch mounting seat is provided with a pivot limiting groove, and the pivot limiting groove extends through the latch mounting seat in the front-to-back direction, the rotating shaft is allowed to pass directly through the latch mounting seat. The rotating shaft can be used to assist in limiting the latch mounting seat through the bottom wall of the pivot limiting groove. The opening of the pivot limiting groove extends towards the opening of the latch hole and extends through to one side of the latch mounting seat, so that the latch mounting seat does not need to be produced by side core pulling, thereby reducing the production cost of the latch assembly. The rotating shaft only needs to pass through the pivot mounting hole on the lock shell, which reduces the installation difficulty of the rotating shaft and thus reduces the assembly difficulty of the latch assembly.

[0007] According to some embodiments of the present invention, the locking tongue body is provided with a connecting groove, one end of the swing arm is inserted into the connecting groove and abuts against the groove wall, the other end of the swing arm is connected to the driving mechanism, and the rotating shaft is located in the middle of the swing arm.

[0008] According to some embodiments of the present invention, the latch mounting base is provided with a positioning insert, the bottom wall of the rotating shaft mounting hole is provided with a positioning hole, and the positioning insert is embedded in the positioning hole.

[0009] According to some embodiments of this utility model, the lock housing includes a first housing and a second housing, the second housing being telescopically connected to the first housing in the left-right direction, a locking structure being provided between the first housing and the second housing, the locking structure being used to lock or unlock the position of the second housing relative to the first housing, the lock tongue hole being provided in the second housing, the driving mechanism including a driving dial and a transmission structure, the driving dial being rotatably disposed in the first housing, the driving dial being driven and engaged with the swing arm through the transmission structure, and the length of the transmission structure being adjustable in the left-right direction.

[0010] According to some embodiments of the present invention, the first housing is provided with a housing mounting hole in the left-right direction, the second housing is slidably connected to the housing mounting hole, the second housing is provided with a guide slider, the wall of the housing mounting hole is provided with a spiral groove, the central axis of the spiral groove is provided in the left-right direction, the guide slider is slidably disposed in the spiral groove, and the second housing can rotate and extend relative to the first housing in a spiral manner.

[0011] According to some embodiments of the present invention, the transmission structure includes a first transmission member and a second transmission member arranged in a left-right direction. The first transmission member is slidably connected to the first housing in a left-right direction, and the second transmission member is slidably connected to the second housing in a left-right direction. One end of the first transmission member is connected to the drive dial wheel, and the other end of the first transmission member is provided with a first push block and a second push block. The distance between the first push block and the drive dial wheel is less than the distance between the second push block and the drive dial wheel. When the second housing extends or retracts relative to the first housing, one end of the second transmission member can switch to abut against the first push block or the second push block, and the other end of the second transmission member abuts against the swing arm.

[0012] According to some embodiments of the present invention, the first transmission member is located between the drive dial and the second transmission member, and the transmission structure further includes a reset elastic member disposed in the first housing. The reset elastic member abuts against the first transmission member and applies a force to cause the first transmission member to move toward the drive dial.

[0013] According to some embodiments of this utility model, two reset elastic elements are provided, arranged side by side, one of which abuts against the upper part of the first transmission element, and the other reset elastic element abuts against the lower part of the first transmission element.

[0014] According to some embodiments of the present invention, the first push block and the second push block are respectively located at the upper and lower ends of the first transmission member, the drive dial is provided with a dial block, the upper end of the dial block abuts against the upper end of the first transmission member, and the lower end of the dial block abuts against the lower end of the first transmission member.

[0015] The lock according to the second aspect embodiment of the present invention employs the above-described latch assembly.

[0016] The lock according to the second aspect of the present invention has at least the following beneficial effects: due to the use of the above-mentioned latch assembly, production costs and assembly difficulty can be reduced.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a perspective view of the latch assembly in the shortened state according to an embodiment of the present invention;

[0020] Figure 2 This is an embodiment of the present utility model. Figure 1 Schematic cross-sectional view along the AA direction;

[0021] Figure 3 This is a three-dimensional schematic diagram of the latch assembly in the extended state according to an embodiment of the present utility model;

[0022] Figure 4 This is an embodiment of the present utility model. Figure 3 Cross-sectional view along the BB direction;

[0023] Figure 5 This is a perspective view of the drive mechanism and the second housing according to an embodiment of the present utility model;

[0024] Figure 6 This is an exploded view of the second housing and the latch mounting base according to an embodiment of the present utility model;

[0025] Figure 7 This is an exploded view of the second housing, latch mounting base, rotating shaft, and swing arm according to an embodiment of the present invention.

[0026] Figure 8 This is an exploded view of the first and second housings according to an embodiment of the present invention.

[0027] Figure label:

[0028] Lock housing 100, first housing 110, spiral groove 111, second housing 120, lock tongue hole 121, pivot mounting hole 122, positioning insertion hole 123, guide slider 124, locking structure 130, elastic locking protrusion 131, limit locking groove 132.

[0029] Lock tongue mounting base 200, pivot limit groove 210, positioning block 220;

[0030] Locking tongue mechanism 300, locking tongue body 310, connecting groove 311, locking tongue elastic element 320, swing arm 330, rotating shaft 340;

[0031] Drive mechanism 400, drive dial 410, dial block 411, transmission structure 420, first transmission component 421, first push block 4211, second push block 4212, second transmission component 422, reset elastic component 430. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] Reference Figures 1 to 8 This embodiment of the present invention includes a latch assembly comprising a lock housing 100, a latch mounting base 200, a latch mechanism 300, and a drive mechanism 400. The lock housing 100 has a latch hole 121 along the left-right direction, and a pivot mounting hole 122 is provided on the wall of the latch hole 121. The latch mounting base 200 is disposed at the bottom of the latch hole 121 and has a pivot limiting groove 210 that extends through the latch mounting base 200 along the front-back direction. The opening of the pivot limiting groove 210 faces the opening of the latch hole 121 and extends through to the outer wall of the latch mounting base 200. The latch mechanism 300 is disposed on the latch mounting base 200 and includes a latch body 310 and a latch. The lock tongue body 310 is telescopically mounted on the lock tongue mounting base 200. The lock tongue elastic element 320 is used to drive the lock tongue body 310 to extend. The swing arm 330 is pivotally connected to the rotating shaft 340. The rotating shaft 340 is arranged in the front-back direction and passes through the rotating shaft limiting groove 210. The end of the rotating shaft 340 is inserted into the rotating shaft mounting hole 122. One end of the swing arm 330 is in transmission cooperation with the lock tongue body 310. The drive mechanism 400 is arranged on the lock housing 100 and can drive the lock tongue body 310 to retract through the swing arm 330.

[0037] The latch body 310 can be extended by the latch elastic element 320, and the drive mechanism 400 can retract the latch body 310 by the swing arm 330. The latch body 310 is installed into the latch hole 121 through the latch mounting seat 200. Since the latch mounting seat 200 is provided with a pivot limiting groove 210, and the pivot limiting groove 210 extends through the latch mounting seat 200 in the front-to-back direction, the rotating shaft 340 is allowed to pass directly through the latch mounting seat 200, and the rotating shaft 340 can pass through the pivot limiting groove 210. The bottom wall of the slot 210 is used to assist in limiting the bolt mounting base 200. The opening of the pivot limiting slot 210 extends towards the opening of the bolt hole 121 and passes through to one side of the bolt mounting base 200, so that the bolt mounting base 200 does not need to be produced by side core pulling, thereby reducing the production cost of the bolt assembly. The rotating shaft 340 only needs to pass through the pivot mounting hole 122 on the lock shell, which reduces the installation difficulty of the rotating shaft 340, thereby reducing the assembly difficulty of the bolt assembly.

[0038] Specifically, the latch body 310 is slidably connected to the latch mounting base 200 through a sliding block structure; it is conceivable that the latch body 310 can also be telescopic through a guide post and guide sleeve structure.

[0039] Specifically, the latch spring 320 is a spring. It is conceivable that the latch spring 320 could also be a sheet spring or a torsion spring, etc.

[0040] Specifically, the wall of the latch hole 121 has some protrusions, which can improve the installation accuracy and installation firmness of the latch mounting base 200.

[0041] In the embodiments, reference is made to Figure 2 and Figure 4 The locking tongue body 310 is provided with a connecting groove 311. One end of the swing arm 330 is inserted into the connecting groove 311 and abuts against the groove wall of the connecting groove 311. The other end of the swing arm 330 is connected to the drive mechanism 400 for transmission. The rotating shaft 340 is located in the middle of the swing arm 330.

[0042] The swing arm 330 is similar to a lever structure. When the drive mechanism 400 pushes one end of the swing arm 330, the swing arm 330 swings. The other end can push the locking tongue 310, causing the locking tongue 310 to retract. The structure of the swing arm 330 is simple and compact. The drive mechanism 400 can use a small displacement to make the locking tongue 310 retract with a large displacement.

[0043] In the embodiments, reference is made to Figure 6The latch mounting base 200 is provided with a positioning insert 220, and the bottom wall of the pivot mounting hole 122 is provided with a positioning insert 123, in which the positioning insert 220 is embedded. By inserting the insert, the installation firmness and installation accuracy of the latch mounting base 200 in the latch hole 121 are further improved.

[0044] Specifically, the latch mounting base 200 is interference-fitted with the latch hole 121, making the latch mounting base 200 less prone to loosening.

[0045] In the embodiments, reference is made to Figure 1 , Figure 3 and Figure 8 The lock housing 100 includes a first housing 110 and a second housing 120. The second housing 120 is telescopically connected to the first housing 110 in the left-right direction. A locking structure 130 is provided between the first housing 110 and the second housing 120. The locking structure 130 is used to lock or unlock the position of the second housing 120 relative to the first housing 110. A latch hole 121 is provided in the second housing 120. The drive mechanism 400 includes a drive dial 410 and a transmission structure 420. The drive dial 410 is rotatably disposed in the first housing 110. The drive dial 410 is driven and engaged with the swing arm 330 through the transmission structure 420. The length of the transmission structure 420 in the left-right direction is adjustable.

[0046] The second housing 120 can extend and retract relative to the first housing 110, so that the total length of the lock housing 100 in the left and right directions can be adjusted. Combined with the adjustable length of the transmission structure 420 in the left and right directions, the distance between the drive dial 410 and the lock tongue body 310 can be adjusted, forming lock tongue assemblies of different lengths to adapt to different usage scenarios and improve the flexibility of the lock tongue assembly.

[0047] In the embodiments, reference is made to Figure 8 The first housing 110 has a housing mounting hole along the left-right direction. The second housing 120 is slidably connected to the housing mounting hole. The second housing 120 is provided with a guide slider 124. The wall of the housing mounting hole is provided with a spiral groove 111. The central axis of the spiral groove 111 is set along the left-right direction. The guide slider 124 is slidably disposed in the spiral groove 111. The second housing 120 can spirally rotate and extend relative to the first housing 110. By spirally rotating relative to the first housing 110, and because the central axis of the spiral groove 111 is set along the left-right direction, the second housing 120 can achieve left-right extension and retraction relative to the first housing 110 through spiral rotation. The structure is simple and easy to implement.

[0048] It is conceivable that in other embodiments, a guide slider 124 may be provided in the first housing 110 and a spiral groove 111 may be provided in the second housing 120.

[0049] It is conceivable that in other embodiments, a sliding hole may be provided in the first housing 110 along the left-right direction, and the second housing 120 may be slidably connected to the sliding hole along the left-right direction, so that the second housing 120 can extend and retract relative to the first housing 110.

[0050] In the embodiments, reference is made to Figure 2 , Figure 4 and Figure 5 The transmission structure 420 includes a first transmission member 421 and a second transmission member 422 arranged in the left-right direction. The first transmission member 421 is slidably connected to the first housing 110 in the left-right direction, and the second transmission member 422 is slidably connected to the second housing 120 in the left-right direction. One end of the first transmission member 421 is connected to the drive dial 410, and the other end of the first transmission member 421 is provided with a first push block 4211 and a second push block 4212. The distance between the first push block 4211 and the drive dial 410 is smaller than the distance between the second push block 4212 and the drive dial 410. When the second housing 120 extends or retracts relative to the first housing 110, one end of the second transmission member 422 can switch to abut against the first push block 4211 or the second push block 4212, and the other end of the second transmission member 422 abuts against the swing arm 330.

[0051] Specifically, the first transmission component 421 and the second transmission component 422 can slide relative to the lock housing through a sliding block structure or a guide post and guide sleeve structure.

[0052] Because the distances between the first push block 4211, the second push block 4212 and the drive dial 410 are different, when one end of the second transmission member 422 abuts against the first push block 4211, the length of the transmission structure 420 in the left-right direction is shorter; when one end of the second transmission member 422 abuts against the second push block 4212, the length of the transmission structure 420 in the left-right direction is longer, thus forming transmission structures 420 of different lengths, so that the distance between the drive dial 410 and the lock tongue 310 can be different, adapting to lock cases 100 of different lengths.

[0053] Specifically, since the second housing 120 can rotate spirally relative to the first housing 110, when the lock housing 100 is in a shortened state, the second transmission member 422 abuts against the first push block 4211; when the second housing 120 rotates spirally relative to the first housing 110, causing the lock housing 100 to extend, the second transmission member 422 first separates from the first transmission member 421, and then the second transmission member 422 rotates with the second lock housing 100 until the second transmission member 422 aligns with and abuts against the second push block 4212, at which point the lock housing 100 is in an extended state.

[0054] It is conceivable that in other embodiments, the length of the transmission structure 420 can be adjusted in different ways. For example, the second transmission member 422 can be rotated relative to the first transmission member 421 by a helical structure to adjust the total length of the two, thereby adjusting the length of the transmission structure 420.

[0055] Since the second housing 120 rotates spirally relative to the first housing 110, the second transmission member 422 will go through the process of separating from the first transmission member 421 and then re-engaging, the first transmission member 421 may wobble and misalign, preventing the second lock housing 100 from rotating into place and affecting the process of the second transmission member 422 re-engaging with the first transmission member 421. Therefore, the following improvements are made.

[0056] In the embodiments, reference is made to Figure 2 , Figure 4 and Figure 5 The first transmission member 421 is located between the drive dial 410 and the second transmission member 422. The transmission structure 420 also includes a reset elastic member 430. The reset elastic member 430 is disposed in the first housing 110. The reset elastic member 430 abuts against the first transmission member 421 and applies a force to make the first transmission member 421 move toward the drive dial 410.

[0057] The reset elastic element 430 ensures that the first transmission element 421 is always in contact with the drive dial 410, avoiding the risk of the first transmission element 421 wobbling and misaligning, improving the stability of the overall length adjustment process of the latch assembly, and also helping to reduce the play between the drive dial 410 and the first transmission element 421.

[0058] Specifically, the reset elastic element 430 is a spring, with one end abutting against the first lock housing 100 and the other end abutting against the first transmission element 421. It is conceivable that in some other embodiments, the reset elastic element 430 may also be a structure such as a spring sheet or an elastic rubber block.

[0059] In the embodiments, reference is made to Figure 2 , Figure 4 and Figure 5 Two reset elastic elements 430 are provided, arranged side by side, one above the other. One reset elastic element 430 abuts against the upper part of the first transmission element 421, and the other reset elastic element 430 abuts against the lower part of the first transmission element 421. Providing two reset elastic elements 430 makes the position of the first transmission element 421 more stable and ensures a tighter contact between the first transmission element 421 and the drive dial 410.

[0060] In the embodiments, reference is made to Figure 2 , Figure 4 and Figure 5The first push block 4211 and the second push block 4212 are located at the upper and lower ends of the first transmission member 421, respectively. The drive wheel 410 is provided with a lever 411, the upper end of which abuts against the upper end of the first transmission member 421, and the lower end of which abuts against the lower end of the first transmission member 421. The drive wheel 410 can slide in both forward and reverse directions by pushing the first transmission member 421 with the lever 411, adapting to different application scenarios and improving the flexibility of use.

[0061] In the embodiments, reference is made to Figure 2 and Figure 4 The locking structure 130 includes an elastic locking protrusion 131 and two limiting slots 132. The elastic locking protrusion 131 is disposed on the first housing 110, and the limiting slots 132 are disposed on the second housing 120. The elastic locking protrusion 131 and the limiting slots 132 are adapted to each other. Through the elastic locking protrusion 131 and the limiting slots 132, when the second housing 120 rotates helically relative to the first housing 110 until the elastic locking protrusion 131 and the limiting slots 132 are aligned, the elastic locking protrusion 131 engages with the limiting slots 132, locking the positions of both to a certain extent, making the first housing 110 and the second housing 120 less prone to loosening. When it is necessary to readjust the length of the lock housing 100, a greater force is applied to make the second housing 120 rotate relative to the first housing 110. At this time, the elastic locking protrusion 131 can disengage from the limiting slots 132 to achieve the unlocked position, and then the second housing 120 is allowed to rotate relative to the first housing 110.

[0062] Specifically, there are two limiting slots 132. When the guide slider 124 slides to one end of the spiral groove 111, the elastic protrusion 131 engages with the first limiting slot 132; when the guide slider 124 slides to the other end of the spiral groove 111, the elastic protrusion 131 engages with the second limiting slot 132. It is conceivable that in some other embodiments, the limiting slots 132 may be provided with three or more, which is not limited here.

[0063] Specifically, the first housing 110 is integrally formed to form the elastic latching protrusion 131.

[0064] It is conceivable that in other embodiments, the locking structure 130 may also include a first pin hole, a second pin hole, and a latch, with the first pin hole disposed in the first housing 110 and the second pin hole disposed in the second housing 120. When the first pin hole and the second pin hole are aligned, the latch can be inserted into the first pin hole and the second pin hole to lock the position of the second housing 120 relative to the first housing 110; when the latch is pulled out, the second housing 120 is allowed to extend or retract relative to the first housing 110.

[0065] Specifically, the locking tongue assembly in this embodiment is used as follows: When the locking tongue assembly is in the shortened state, when the drive wheel 410 rotates, the first transmission member 421 can be pushed to the right by the lever 411. The first transmission member 421 pushes the second transmission member 422 through the first push block 4211, and then the locking tongue body 310 is retracted by the swing arm 330. When the second housing 120 rotates spirally relative to the first housing 110, the second transmission member 422 first separates from the first push block 4211, and then the second transmission member 422 abuts against the second push block 4212. At this time, the locking tongue assembly switches to the extended state. Rotating the drive wheel 410 causes the first transmission member 421 to slide to the right, and the locking tongue body 310 can be retracted by the second push block 4212, the second transmission member 422, and the swing arm 330.

[0066] This utility model also discloses a lock that uses the aforementioned latch assembly. The use of this latch assembly reduces production costs and assembly difficulty.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A strike plate assembly, comprising: include: The lock case (100) has a latch hole (121) in the left-right direction, and the wall of the latch hole (121) has a pivot mounting hole (122); A latch mounting base (200) is disposed at the bottom of the latch hole (121). The latch mounting base (200) is provided with a pivot limiting groove (210). The pivot limiting groove (210) extends through the latch mounting base (200) in the front-back direction. The opening of the pivot limiting groove (210) faces the opening of the latch hole (121) and extends through to the outer wall of the latch mounting base (200). A latch mechanism (300) is disposed on the latch mounting base (200). The latch mechanism (300) includes a latch body (310), a latch elastic element (320), a swing arm (330), and a rotating shaft (340). The latch body (310) is telescopically disposed on the latch mounting base (200). The latch elastic element (320) is used to drive the latch body (310) to extend. The swing arm (330) is pivotally connected to the rotating shaft (340). The rotating shaft (340) is disposed in the front-back direction and passes through the rotating shaft limiting groove (210). The end of the rotating shaft (340) is inserted into the rotating shaft mounting hole (122). One end of the swing arm (330) is in transmission cooperation with the latch body (310). A drive mechanism (400) is disposed in the lock housing (100) and can drive the bolt (310) to retract via the swing arm (330).

2. The locking tongue assembly according to claim 1, characterized in that: The locking tongue body (310) is provided with a connecting groove (311). One end of the swing arm (330) is inserted into the connecting groove (311) and abuts against the groove wall of the connecting groove (311). The other end of the swing arm (330) is connected to the driving mechanism (400) for transmission. The rotating shaft (340) is located in the middle of the swing arm (330).

3. The locking tongue assembly according to claim 1, characterized in that: The latch mounting base (200) is provided with a positioning insert (220), and the bottom wall of the rotating shaft mounting hole (122) is provided with a positioning hole (123), and the positioning insert (220) is embedded in the positioning hole (123).

4. The locking tongue assembly according to claim 1, characterized in that: The lock housing (100) includes a first housing (110) and a second housing (120). The second housing (120) is telescopically connected to the first housing (110) in the left-right direction. A locking structure (130) is provided between the first housing (110) and the second housing (120). The locking structure (130) is used to lock or unlock the position of the second housing (120) relative to the first housing (110). The latch hole (121) is provided in the second housing (120). The drive mechanism (400) includes a drive dial (410) and a transmission structure (420). The drive dial (410) is rotatably disposed in the first housing (110). The drive dial (410) is driven and engaged with the swing arm (330) through the transmission structure (420). The length of the transmission structure (420) in the left-right direction is adjustable.

5. The locking tongue assembly according to claim 4, characterized in that: The first housing (110) is provided with a housing mounting hole in the left-right direction. The second housing (120) is slidably connected to the housing mounting hole. The second housing (120) is provided with a guide slider (124). The wall of the housing mounting hole is provided with a spiral groove (111). The central axis of the spiral groove (111) is provided in the left-right direction. The guide slider (124) is slidably disposed in the spiral groove (111). The second housing (120) can spirally rotate and extend relative to the first housing (110).

6. The locking tongue assembly according to claim 4, characterized in that: The transmission structure (420) includes a first transmission member (421) and a second transmission member (422) arranged in a left-right direction. The first transmission member (421) is slidably connected to the first housing (110) in a left-right direction, and the second transmission member (422) is slidably connected to the second housing (120) in a left-right direction. One end of the first transmission member (421) is connected to the drive dial (410) in a transmission connection, and the other end of the first transmission member (421) is provided with a first push block (4211) and a second push block (4222). The distance between the first push block (4211) and the drive dial (410) is less than the distance between the second push block (4212) and the drive dial (410). When the second housing (120) extends or retracts relative to the first housing (110), one end of the second transmission member (422) can switch to abut against the first push block (4211) or the second push block (4212), and the other end of the second transmission member (422) abuts against the swing arm (330).

7. The locking tongue assembly according to claim 6, characterized in that: The first transmission member (421) is located between the drive dial (410) and the second transmission member (422). The transmission structure (420) further includes a reset elastic member (430), which is disposed in the first housing (110). The reset elastic member (430) abuts against the first transmission member (421) and applies a force to cause the first transmission member (421) to move toward the drive dial (410).

8. The locking tongue assembly according to claim 7, characterized in that: Two reset elastic elements (430) are provided, arranged side by side, one of which abuts against the upper part of the first transmission element (421), and the other abuts against the lower part of the first transmission element (421).

9. The locking tongue assembly according to claim 6, characterized in that: The first push block (4211) and the second push block (4212) are located at the upper and lower ends of the first transmission member (421), respectively. The drive wheel (410) is provided with a paddle (411). The upper end of the paddle (411) abuts against the upper end of the first transmission member (421), and the lower end of the paddle (411) abuts against the lower end of the first transmission member (421).

10. A lock, characterized in that, Includes the locking tongue assembly as described in any one of claims 1 to 9.

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