A catch

Abstract

The utility model relates to a lock, with the card slot part and the lock part, the lock part has the casing, the dog claw and the handle, the dog claw is installed on the casing and has the dog hook that stretches out from the casing, and the dog hook is used for the clamping of the card slot part's card slot, the handle is the lever form, and the inner end head of handle connects the dog claw, in order to pull handle, makes the handle drive dog claw moves in the casing, the casing still is equipped with the limit cam and the elastic part, is equipped with the special-shaped limit slot and the impact part on the limit cam, and the special-shaped limit slot is the dog claw establishes the slidable state and the locking state, and the limit cam relatively rotates through the impact part and the card slot part or the door frame impact to make the limit support foot of dog claw slide out from the positioning groove, and the locking state of dog claw is cancelled, the elastic part is installed in the casing and is connected with the dog claw, and the elastic force provided by the elastic part is used for the clamping of the dog hook and the card slot, the utility model discloses simple structure, and the component is few, and the production and assembly are convenient, and the production cost is lower, and have better practicality.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and in particular to a type of latch lock used to lock a door or a door post lined with a washer. Background Technology

[0002] Currently, various test chambers / cabinets and furnaces typically have gaskets on their doors or frames to create the required artificial environment and ensure a proper seal when closed. Pulling the door against the side post of the door frame creates pressure and sealing force on the gasket, necessitating a locking mechanism. This locking mechanism is operated by a handle to achieve the desired locking configuration. However, current locking mechanisms are relatively complex in structure. For example, the clamping locking mechanism in the applicant's earlier Chinese patent application No. 202220167232.6 has many components, making it inconvenient to manufacture and assemble, and resulting in high production costs. Summary of the Invention

[0003] The purpose of this utility model is to provide a locking mechanism that, while satisfying the door locking requirements, optimizes the structure, reduces the number of parts, facilitates manufacturing and assembly, and lowers manufacturing costs.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A card lock having:

[0006] The card slot portion is provided on the door frame and has an outwardly facing opening that extends in a first direction.

[0007] The locking mechanism is mounted on the door and includes a housing, claws, and a handle. The housing is fixed to the door, and the claws are mounted on the housing and have hooks extending from it. The hooks engage with the slots in the locking mechanism. The handle is mounted on the housing and can rotate relative to it. The handle has an outer end extending from the housing for connecting to an external operating component. The handle is lever-shaped, and its inner end is connected to the claws. By turning the handle, the claws are moved within the housing to release the engagement between the hooks and the slots.

[0008] The housing also includes a limiting cam and an elastic element. The limiting cam is assembled inside the housing and can rotate relative to it. A torsion spring supports the limiting cam and the housing. The limiting cam has a shaped limiting groove and an impact part. The shaped limiting groove is connected to a pre-set limiting foot on the pawl. The shaped limiting groove includes a guide groove and a positioning groove at one end of the guide groove. The shaped limiting groove and the limiting foot cooperate to establish a sliding state and a locked state for the pawl. In the sliding state, the limiting foot of the pawl is in the guide groove of the shaped limiting groove and can be used for snap-fit ​​connection. In the locked state, the limiting foot slides into the positioning groove of the shaped limiting groove. At this time, the pawl's hook disengages from the snap-fit, and the impact part of the limiting cam protrudes from the housing so that the limiting cam can rotate relative to the pawl by impacting the groove part or the door frame, so that the limiting foot slides out of the positioning groove and releases the pawl from the locked state.

[0009] The elastic element is installed inside the housing and connected to the claw. The elastic force provided by the elastic element is used to support the engagement of the hook and the slot.

[0010] A further improvement of the above solution is that the interior of the housing is provided with a sliding groove for guiding the movement of the claw, and the claw has a slider portion adapted to be embedded in the sliding groove.

[0011] A further embodiment of the above scheme is that the pawl is connected to the inner end of the handle via a connecting rod, one end of which is hinged to the slider of the pawl, and the other end of which is hinged to the inner end of the handle.

[0012] A further aspect of the above solution is that an elastic element, which is a compression spring, is installed at one end of the slide groove. The elastic element supports the slider of the chuck, so that the chuck receives a preload.

[0013] The above solution is further described as follows: the chuck is L-shaped, with one arm of the chuck extending out of the housing and forming a hook; the other arm of the chuck is provided with a clearance groove cut inward from the end, which is used to fit a limiting cam, and a limiting foot is provided in the clearance groove so that the limiting foot is inserted into the irregular limiting groove of the limiting cam; the limiting foot is a column connecting the upper and lower side walls of the clearance groove.

[0014] A further aspect of the above solution is that the slider part of the claw is provided with a recessed hole, one end of the connecting rod extends into the recessed hole and is inserted into a pre-set pin hole on the slider part through a protruding pin; the other end of the connecting rod is formed into a harpoon shape so that the inner end of the handle is inserted into the harpoon of the connecting rod and then hinged.

[0015] A further aspect of the above scheme is that the housing is a square box, the hook of the pawl and the impact part of the limiting cam protrude from the same side of the housing, while the outer end of the handle protrudes from the other side of the housing, so that the outer end of the handle is away from the hook.

[0016] Furthermore, the housing is composed of a base and a top cover. The base has a recessed mounting space, and the claw, handle, and limiting cam are all positioned in the mounting space of the base.

[0017] The above solution is further provided that the base is provided with a first limiting post and a second limiting post, the first limiting post being used to abut against the claw, and the second limiting post being used to abut against the inner end of the handle.

[0018] The above solution is further described in that the impact part of the limiting cam is the raised profile of the limiting cam, the impact part impacts the slot part, and a self-rotating roller matching the impact is provided on the slot part.

[0019] This invention utilizes the cooperation of a chuck, handle, limiting cam, and elastic element to achieve both handle-driven chuck unlocking and effective limiting and locking of the chuck for subsequent locking operations. Conversely, impacting the limiting cam automatically releases the chuck's lock, allowing the elastic element to support the chuck's hook and slot engagement, thus locking the door. The design is simple, with few parts, facilitating manufacturing and assembly, resulting in lower production costs. It meets the requirements for closing pressure washers in various test chambers / cabinets and furnaces, demonstrating excellent practicality. Attached Figure Description

[0020] Appendix Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0021] Appendix Figure 2 for Figure 1 Internal structure assembly diagram of the embodiment;

[0022] Appendix Figure 3 for Figure 1 Schematic diagram of the structural breakdown of the embodiment;

[0023] Appendix Figure 4 for Figure 1 A partial structural cross-sectional view of the embodiment;

[0024] Appendix Figure 5 for Figure 1 A schematic diagram of the structure of the embodiment used in a test chamber / cabinet;

[0025] Appendix Figure 6 for Figure 5 A magnified schematic diagram of a partial structure in the embodiment. Detailed Implementation

[0026] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model.

[0027] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0028] See Figure 1 , 2 Figures 3, 4, 5, and 6 are schematic diagrams of a preferred embodiment of this utility model. This utility model relates to a latch, which has a latching slot portion 1 and a latching lock portion 2. The latching slot portion is disposed on a door frame 100 and provides a latching slot 11. The latching slot 11 has an outward-facing opening that extends along a first direction. The extension length of the opening is sufficient for subsequent hook insertion and sliding. Of course, it is not excluded that the latching slot portion 1 is directly integrally manufactured with the door frame 100; this is not a limitation. The latching lock portion 2 is disposed on a corresponding door 200, corresponding to the latching slot portion 1, so that when the door is closed, the latching lock portion 2 and the latching slot portion 1 engage.

[0029] The locking part 2 has a housing 21, a claw 22, and a handle 23. The housing 21 is fixed to the door 200. The claw 22 is mounted on the housing and has a hook 221 extending from the housing. The hook 221 is used to engage with the slot 11 of the locking part. The handle 23 is mounted on the housing and can rotate relative to it. The handle 23 has an outer end 231 extending from the housing to connect to an external operating component 300. In this embodiment, the operating component 300 is a pull rod. The present invention is provided at both the upper and lower ends of the operating component 300, that is, the locking part 2 is installed on both the upper and lower sides of the door 200 to obtain multiple locking points. The handle 23 is in the form of a lever. The inner end 232 of the handle is connected to the claw 22 so that the handle can be turned so that the handle 23 drives the claw 22 to move within the housing to release the engagement between the hook 221 and the slot 11.

[0030] The housing 21 is also provided with a limiting cam 24 and an elastic element 25. The limiting cam 24 is assembled in the housing and can rotate relative to it. A torsion spring 26 supports the limiting cam and the housing. Figure 2 , 3As shown in Figure 4, the limiting cam 24 is inserted into a pre-set shaft hole in the housing via a positioning shaft 241 protruding from it, enabling relative rotation of the limiting cam 24. A torsion spring 26 is sleeved on the positioning shaft 241, providing preload to the limiting cam 24 for subsequent operation. The limiting cam 24 is flat and features a shaped limiting groove 242 and an impact part 243. The shaped limiting groove 242 connects to a pre-set limiting support leg 222 on the chuck 22. The irregularly shaped limiting groove 242 includes a guide groove 2421 and a positioning groove 2422 located at one end of the guide groove. The positioning groove 2422 is a relatively bent recessed position. The irregularly shaped limiting groove 242 and the limiting support leg 222 cooperate to establish a sliding state and a locked state for the claw 22: In the sliding state, the limiting support leg 222 of the claw is located in the guide groove 2421 of the irregularly shaped limiting groove, and the claw can move for locking work; while in the locked state, the limiting support leg 222 of the claw slides into the positioning groove 2421 of the irregularly shaped limiting groove. In the positioning groove 2422, the limiting foot 222 is restricted, thereby restricting the movement of the pawl 22 within the housing. The pawl 22 maintains a stable posture, and at this time, the hook 221 and the groove 11 are in an unengaged state, thus enabling the door to open and close freely. Meanwhile, the impact part 243 of the limiting cam 24 also protrudes from the housing following the rotation of the limiting cam, so that the limiting cam can be rotated relative to the door frame by impact between the impact part and the groove or the door frame, so that the limiting foot slides out of the positioning groove and releases the pawl from its locked state. The elastic element 25 is installed inside the housing and connected to the pawl 22. The elastic force provided by the elastic element 25 is used to support the engagement between the hook and the groove, achieving a stable locking state.

[0031] Figure 2 , 3As shown in Figure 4, the interior of the housing 21 is provided with a sliding groove 211 for guiding the movement of the pawl. The pawl has a slider portion 223 adapted to be embedded in the sliding groove. The sliding groove 211 is a straight groove, which realizes the reciprocating linear movement of the pawl. An elastic element 25, which is a compression spring, is installed at one end of the sliding groove 211. One end of the elastic element supports the housing 21, and the other end of the elastic element supports the slider portion 223 of the pawl, so that the pawl obtains a preload force. Under the preload action of the torsion spring 26, the limiting cam 24 causes the extension direction of the irregular limiting groove 242 on the limiting cam 24 to intersect the straight direction of the sliding groove 211, so as to meet the subsequent impact operation. The pawl 22 is connected to the inner end 232 of the handle through a connecting rod 27. Specifically, one end of the connecting rod 27 is hinged to the slider portion 223 of the pawl, and the other end of the connecting rod 27 is hinged to the inner end of the handle. The chuck 22 is L-shaped, with one arm extending out of the housing to form a hook 221; the other arm of the chuck is a slider 223, and at the end of the slider 223 away from the elastic member 25, there is a relief groove 2231 with a cut-in structure from the end. The relief groove 2231 is used to fit the limiting cam 24, and a limiting foot 222 is set in the relief groove so that the limiting foot is inserted into the irregular limiting groove of the limiting cam; at this time, the irregular limiting groove 242 is a through groove that runs vertically through the top and bottom. The limiting foot 222 is a column connecting the upper and lower side walls of the relief groove, so that the upper and lower side walls of the relief groove 2231 clamp the limiting cam 24, while the limiting foot 222 passes through the irregular limiting groove. The structure is stable and reliable, which helps the limiting foot 222 to move in the irregular limiting groove 242, and is durable.

[0032] The slider portion 223 of the chuck has a recessed hole 2232. One end of the connecting rod 27 extends into the recessed hole and is inserted into the pre-set pin hole 2233 on the slider portion through the protruding pin 271, thus achieving a hinge connection. The other end of the connecting rod 27 is shaped like a harpoon, so that the inner end 232 of the handle can be inserted into the harpoon of the connecting rod and then hinged, increasing the structural integrity of the hinge connection. In operation, the connection of the connecting rod 27 enhances the connection motion performance and improves the operating efficiency and user experience of the handle 23.

[0033] Figure 1 , 2 As shown in Figures 3 and 4, the housing 21 is a square box. The latch hook 221 and the impact part 243 of the limiting cam protrude from the same side of the housing, while the outer end 231 of the handle protrudes from the other side of the housing, keeping the outer end of the handle away from the latch hook for easy operation. Furthermore, the housing 21 is composed of a base 212 and a top cover 213. The base has a recessed mounting space, and the latch 22, handle 23, and limiting cam 24 are all positioned in the mounting space of the base. The structure is compact and reasonable, facilitating assembly and maintenance.

[0034] Furthermore, the base is provided with a first limiting post 2121 and a second limiting post 2122. The first limiting post 2121 is used to abut against the pawl 22, limiting the movement of the pawl 22, satisfying the locking operation while providing corresponding limiting protection. The second limiting post 2122 is used to abut against the inner end 232 of the handle, also limiting the rotation of the handle, which is beneficial for subsequent levering operations. The impact part 243 of the limiting cam is the raised profile of the limiting cam. The impact part 243 impacts the slot part 1, and a matching rotating roller 12 is provided on the slot part. The rotating roller 12 protrudes slightly to increase the impact effect and service life.

[0035] Figure 5 , 6 As shown, this utility model is installed on corresponding test chambers / cabinets and various types of furnaces. The slot part is located on the door frame 100, and the locking part 2 is located on the corresponding door 200. The outer end 231 of the handle 23 is connected to the external operating component 300. By operating the component 300, the handle 23 is turned, causing the inner end 232 of the handle 23 to pull the claw 22 through the connecting rod 27, so that the claw 22 moves towards the elastic member 25. At this time, the elastic member 25 is compressed and stores force, and at the same time, the limit on the claw... The positioning foot 222 moves in the irregularly shaped limiting groove 242. The limiting foot 222 slides from the guide groove 2421 to the positioning groove 2422. During this process, the limiting cam is also rotated relative to the limiting foot 222 due to the squeezing force of the limiting foot 222. The impact part 243 thus protrudes outward from the housing. When the limiting foot 222 slides into the positioning groove 2422, the limiting foot 222 is restricted and forms a lock, thereby restricting the movement of the pawl 22 in the housing. The pawl 22 maintains a corresponding stable posture, which is the locked state. When the door 200 is closed, the hook 221 on the claw is inserted into the slot 11. At the same time, the impact part 243 impacts the rotating roller 12 on the slot, causing the limiting cam 24 to rotate relative to each other and the positioning groove 2422 to release the limiting support foot 222, achieving the impact unlocking effect. The limiting support foot 222 slides out of the positioning groove 2422, and the claw 22 is released and unrestricted. At this time, the elastic force of the elastic element 25 pushes the claw 22 to move inside the housing, and the hook 221 slides to the position of engaging the slot 11, thus realizing the door closing and anti-detachment.

[0036] When the door needs to be opened, as mentioned above, the handle 23 is turned by operating the component 300 again. The pawl moves and drives the hook 221 to disengage. The pawl 22 can then be used to open and close the door while it is locked. This process is repeated sequentially.

[0037] This invention utilizes the cooperation of a chuck, handle, limiting cam, and elastic element to achieve both handle-driven chuck unlocking and effective limiting and locking of the chuck for subsequent locking operations. Conversely, impacting the limiting cam automatically releases the chuck's lock, allowing the elastic element to support the chuck's hook and slot engagement, thus locking the door. The design is simple, with few parts, facilitating manufacturing and assembly, resulting in lower production costs. It meets the requirements for closing pressure washers in various test chambers / cabinets and furnaces, demonstrating excellent practicality.

[0038] Of course, the above detailed description of the present utility model in conjunction with the embodiments is only for illustrating the technical concept and features of the present utility model. Its purpose is to enable those skilled in the art to understand the content of the present utility model and implement it. Therefore, all equivalent changes or modifications made in accordance with the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A card lock, characterized in that, have: The card slot portion is provided on the door frame and has an outwardly facing opening that extends in a first direction. The locking mechanism is mounted on the door and includes a housing, claws, and a handle. The housing is fixed to the door, and the claws are mounted on the housing and have hooks extending from it. The hooks engage with the slots in the locking mechanism. The handle is mounted on the housing and can rotate relative to it. The handle has an outer end extending from the housing for connecting to an external operating component. The handle is lever-shaped, and its inner end is connected to the claws. By turning the handle, the claws are moved within the housing to release the engagement between the hooks and the slots. The housing also includes a limiting cam and an elastic element. The limiting cam is assembled inside the housing and can rotate relative to it. A torsion spring supports the limiting cam and the housing. The limiting cam has a shaped limiting groove and an impact part. The shaped limiting groove is connected to a pre-set limiting foot on the pawl. The shaped limiting groove includes a guide groove and a positioning groove at one end of the guide groove. The shaped limiting groove and the limiting foot cooperate to establish a sliding state and a locked state for the pawl. In the sliding state, the limiting foot of the pawl is in the guide groove of the shaped limiting groove, and the pawl can engage. In the locked state, the limiting foot slides into the positioning groove of the shaped limiting groove. At this time, the pawl's hook disengages, and the impact part of the limiting cam protrudes from the housing so that the limiting cam can rotate relative to the pawl by impacting the groove or the door frame, so that the limiting foot slides out of the positioning groove and releases the pawl from the locked state. The elastic element is installed inside the housing and connected to the claw. The elastic force provided by the elastic element is used to support the engagement of the hook and the slot.

2. A card lock according to claim 1, characterized in that, The housing has a groove inside that guides the movement of the claw, and the claw has a slider portion that is adapted to be embedded in the groove.

3. A card lock according to claim 2, characterized in that, The chuck is connected to the inner end of the handle via a connecting rod. One end of the connecting rod is hinged to the slider of the chuck, and the other end of the connecting rod is hinged to the inner end of the handle.

4. A card lock according to claim 2, characterized in that, An elastic element, which is a compression spring, is installed at one end of the slide groove. The elastic element supports the slider of the chuck, so that the chuck receives a preload.

5. A card lock according to claim 2, characterized in that, The chuck is L-shaped, with one arm of the chuck extending out of the housing and forming a hook; the other arm of the chuck is provided with a clearance groove cut inward from the end, which is used to fit a limiting cam, and a limiting foot is set in the clearance groove so that the limiting foot is inserted into the irregular limiting groove of the limiting cam; the limiting foot is a column connecting the upper and lower side walls of the clearance groove.

6. A card lock according to claim 3, characterized in that, The slider part of the claw is provided with a recessed hole. One end of the connecting rod extends into the recessed hole and is inserted into the pre-set pin hole on the slider part through a protruding pin. The other end of the connecting rod is formed into a harpoon shape so that the inner end of the handle can be inserted into the harpoon of the connecting rod and then hinged.

7. A card lock according to claim 1, characterized in that, The housing is a square box. The hook of the pawl and the impact part of the limiting cam protrude from the same side of the housing, while the outer end of the handle protrudes from the other side of the housing, so that the outer end of the handle is away from the hook.

8. A card lock according to claim 7, characterized in that, The housing is composed of a base and a top cover. The base has a recessed mounting space, and the claw, handle and limiting cam are all positioned in the mounting space of the base.

9. A card lock according to claim 8, characterized in that, The base is provided with a first limiting post and a second limiting post. The first limiting post is used to abut against the claw, and the second limiting post is used to abut against the inner end of the handle.

10. A card lock according to claim 1, characterized in that, The impact part of the limiting cam is the raised profile of the limiting cam. The impact part impacts the slot part, and a self-rotating roller matching the impact is provided on the slot part.

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