Pick-proof lock for narrow door
By simplifying the linkage between the safety tongue and the lock tongue, and using the interaction between the limit slope and the touch slope, an anti-pick lock suitable for narrow-body doors was designed, which solved the problem of large size of the existing anti-pick lock and achieved an efficient and reliable anti-pick function.
Patent Information
- Application Number
- CN202421595183.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-08
AI Technical Summary
The existing anti-pick locks are not suitable for narrow-body doors due to the complex linkage mechanism between the safety tongue and the lock tongue.
An anti-pick lock for narrow-body door is designed. By simplifying the linkage between the safety tongue and the lock tongue, the interaction between the limit slope and the touch slope is used to realize the synchronous or asynchronous movement of the lock tongue and the safety tongue, and reduce the lock body volume.
It is realized that without increasing the lock body volume, it ensures anti-plitting function and is suitable for narrow body doors, improving operating efficiency and reliability.
Smart Images
Figure CN222976578U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of locks, in particular to an anti-pry lock for narrow-body doors. Background Art
[0002] When the door is closed, the anti-pry lock usually locks the lock tongue by the mutual linkage and locking of the safety tongue and the lock tongue, preventing the lock tongue from being pried back and playing the anti-pry function. The anti-pry lock in the related art is not suitable for narrow doors and is not conducive to use because of the complicated and bloated linkage mechanism between the safety tongue and the lock tongue. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an anti-pry lock for narrow-body doors, which can simplify the linkage between the safety tongue and the lock tongue, ensure the anti-pry function while reducing the volume of the lock body, is suitable for narrow-body doors, and meets the use requirements.
[0004] According to the first aspect of the utility model, a narrow-body door anti-pry lock comprises a lock housing, a safety tongue, a lock tongue and a square shaft, wherein the lock housing has an installation cavity inside, and the side wall of the lock housing is provided with a first opening and a second opening communicating with the installation cavity, and the first opening and the second opening are arranged adjacent to each other. The safety tongue is slidably connected to the lock housing and arranged through the first opening, and the safety tongue is provided with a limited inclined platform, and the limited inclined platform is located in the installation cavity. The lock tongue is slidably connected to the lock housing and arranged through the second opening, and the lock tongue is connected with a driving plate, and the driving plate is located in the installation cavity, and a driving step is formed between the lock tongue and the driving plate, and a triggering inclined platform is provided on the side wall of the driving plate close to the safety tongue, and a reset step is formed between the triggering inclined platform and the driving plate, and the reset step and the driving step are arranged opposite to each other. The square shaft is used to connect the handle and be driven by the handle, and the square shaft is connected with a driving plate, and the driving plate can abut against the driving step or the reset step to drive the lock tongue to move toward or away from the outside of the lock housing. The limiting ramp is located at the farthest end away from the first opening as the first giving part, the bottom wall located close to the lock tongue is the first limiting part, the triggering ramp is located at the top wall close to the safety tongue as the second limiting part, and the end located on the side facing the second opening is the second giving part. When the first giving part abuts against the second giving part, the safety tongue is fully extended out of the first opening, and the lock tongue partially extends out of the second opening. When the first limiting part abuts against the second limiting part, the safety tongue is partially retracted into the lock housing, and the lock tongue is fully extended out of the second opening. The limiting ramp squeezes the triggering ramp to limit the retraction of the lock tongue.
[0005] The anti-pry lock for narrow-body doors according to the embodiment of the utility model has at least the following beneficial effects: xxx
[0006] According to some embodiments of the utility model, a limiting member is slidingly provided on the lock housing, the limiting member is provided with a limiting boss, and a limiting slot is provided at the bottom of the driving plate. When the first limiting portion abuts against the second limiting portion, the limiting member moves, and the limiting boss is inserted into the limiting slot to completely limit the retraction of the lock tongue.
[0007] According to some embodiments of the utility model, the lock housing is rotatably provided with a paddle, the square shaft is provided with a linkage boss, the two ends of the paddle can respectively abut the linkage boss and the limit member, when the square shaft abuts the reset step and drives the lock tongue to retract, the linkage boss drives the paddle to rotate, the paddle abuts the limit member, and drives the limit member to move, and the limit boss is separated from the limit slot.
[0008] According to some embodiments of the utility model, the lock housing is provided with a guide groove, and the guide groove is inclined away from the lock tongue. A guide column is provided at the bottom of the limiting ramp, and the guide column is clamped in the guide groove to guide the safety tongue to retract into the lock housing and move in the direction away from the lock tongue, and the first yielding portion is separated from the second yielding portion.
[0009] According to some embodiments of the present invention, the first limiting portion and the second limiting portion are both arranged to be inclined downward from the second opening toward the second opening so as to press the locking tongue to extend out of the second opening.
[0010] According to some embodiments of the utility model, the lock housing is provided with a limit plate, which is located in the installation cavity and at the end of the guide groove. The limit plate can abut and press the limit ramp so that the first limit part squeezes the second limit part to limit the retraction of the lock tongue.
[0011] According to some embodiments of the utility model, the safety tongue is provided with guiding inclined surfaces inclined from the center line to both sides, so that when the safety tongue collides with the door frame, the safety tongue is guided to retract.
[0012] According to some embodiments of the utility model, the lock shell includes a bottom shell, a panel and a side panel, the first opening and the second opening are arranged on the side panel, the bottom shell is a groove-shaped structure, the panel is covered on the bottom shell, and the side panel is connected to the bottom shell and one side of the panel.
[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:
[0015] Figure 1 This is an exploded schematic diagram of an anti-pry lock for a narrow door according to an embodiment of the utility model;
[0016] Figure 2 It is a schematic diagram of the anti-pry lock for narrow-body door in the normally open state according to the embodiment of the utility model;
[0017] Figure 3 This is a schematic diagram of an anti-pry lock for a narrow-body door in a locked state according to an embodiment of the utility model.
[0018] Figure numerals: lock housing 100; bottom housing 110; guide groove 111; limit plate 112; panel 120; side panel 130; first opening 131; second opening 132; safety tongue 200; guide inclined plane 201; limit ramp 210; first yielding portion 211; first limit portion 212; lock tongue 300; driving step 301; reset step 302; driving plate 310; trigger ramp 320; second yielding portion 321; second limit portion 322; square shaft 400; driving plate 410; linkage boss 420; paddle 500; limit member 600; limit boss 610. DETAILED DESCRIPTION
[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0020] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0021] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0022] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution. In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0023] When the door leaf is in the closed state, the anti-pry lock usually realizes the locking of the lock tongue by the mutual linkage and engagement of the safety tongue and the lock tongue, preventing the lock tongue from being pried and retracted, and playing an anti-pry function. The anti-pry locks in the related art are large in volume due to the addition of the safety tongue and the complex and bulky linkage mechanism between the safety tongue and the lock tongue, which are not applicable to narrow doors and are not conducive to use.
[0024] Therefore, referring to Figure 1 、 Figure 2 and Figure 3, is a narrow-body anti-pry lock for doors proposed by the utility model, comprising a lock housing 100, a safety tongue 200, a lock tongue 300 and a square shaft 400, wherein the lock housing 100 has an installation cavity inside, and the side wall of the lock housing 100 is provided with a first opening 131 and a second opening 132 communicating with the installation cavity, and the first opening 131 and the second opening 132 are arranged adjacent to each other. The safety tongue 200 is slidably connected to the lock housing 100 and is arranged through the first opening 131, and the safety tongue 200 is provided with a limit inclined platform 210, and the limit inclined platform 210 is located in the installation cavity. The lock tongue 300 is slidably connected to the lock housing 100 and is disposed through the second opening 132. The lock tongue 300 is connected to a driving plate 310, which is located in the mounting cavity. A driving step 301 is formed between the lock tongue 300 and the driving plate 310. A trigger ramp 320 is disposed on the side wall of the driving plate 310 near the safety tongue 200. A reset step 302 is formed between the trigger ramp 320 and the driving plate 310. The reset step 302 and the driving step 301 are disposed opposite to each other. The square shaft 400 is used to connect to the handle and be driven by the handle. The square shaft 400 is connected to a driving sheet 410, which can abut against the driving step 301 or the reset step 302 to drive the lock tongue 300 to move toward or away from the outside of the lock housing 100. The limiting ramp 210 is located at the farthest end away from the first opening 131 as the first giving part 211, the bottom wall located close to the lock tongue 300 is the first limiting part 212, the triggering ramp 320 is located at the top wall close to the safety tongue 200 as the second limiting part 322, and the end located on the side facing the second opening 132 is the second giving part 321. When the first giving part 211 abuts against the second giving part 321, the safety tongue 200 is fully extended from the first opening 131, and the lock tongue 300 partially extends out of the second opening 132. When the first limiting part 212 abuts against the second limiting part 322, the safety tongue 200 is partially retracted into the lock housing 100, and the lock tongue 300 is fully extended out of the second opening 132. The limiting ramp 210 squeezes the triggering ramp 320 to limit the retraction of the lock tongue 300.
[0025] It is understandable that, when the door leaf is normally open, the safety tongue 200 completely extends out of the first opening 131, the first clearance portion 211 and the second clearance portion 321 abut against each other, and the lock tongue 300 is partially retained in the lock housing 100. When the user closes the door, the safety tongue 200 retracts due to the collision, and a gap is reserved between the door frame and the door leaf to accommodate the safety tongue 200 that partially extends out of the first opening 131, so that the first limiting portion 212 abuts against the second limiting portion 322, and the limiting ramp 210 exerts an extrusion effect on the triggering ramp 320. At this time, the lock tongue 300 completely extends out of the second opening 132 to play an anti-pry role. When the user unlocks the door, by turning the handle to the square shaft 400, the driving sheet 410 abuts against the reset step 302 to drive the lock tongue 300 to move toward the lock housing 100, the triggering ramp 320 drives the limiting ramp 210, and the safety tongue 200 partially retracts at the same time to achieve unlocking and opening the door.
[0026] It should be noted that the interaction between the limiting ramp 210 and the triggering ramp 320 realizes the synchronous or asynchronous movement of the lock tongue 300 and the safety tongue 200, greatly simplifying the complex transmission components in the traditional lock, not only reducing the manufacturing cost, but also improving the operating efficiency and reliability of the lock. . Through the cooperation between the limiting ramp 210 and the triggering ramp 320, when the safety tongue 200 is in a locked state, the lock tongue 300 can be effectively prevented from being illegally opened. Even if an external force attempts to pry open the lock tongue 300, it will be blocked by the close cooperation between the limiting ramp 210 and the triggering ramp 320, ensuring the safety of the door lock. The connection between the square shaft 400 and the drive plate 410 allows the user to control the lock tongue 300 by simply rotating the handle, which is easy and quick to operate. The sliding connection and the inclined platform cooperation method reduce mechanical wear and noise, and improve the durability and stability of the lock.
[0027] Reference Figure 1 , Figure 2 and Figure 3 Furthermore, the lock housing 100 is slidably provided with a limit member 600, the limit member 600 is provided with a limit boss 610, and a limit slot is provided at the bottom of the driving plate 310. When the first limit portion 212 abuts against the second limit portion 322, the limit member 600 moves, and the limit boss 610 is inserted into the limit slot to completely limit the retraction of the lock tongue 300. Through the cooperation of the limit member 600 and the driving plate 310, the double locking of the lock tongue 300 is achieved, and even in extreme cases, the lock tongue 300 can be effectively prevented from being illegally opened, and no additional operation by the user is required, thereby improving the convenience and safety of use.
[0028] Reference Figure 1 , Figure 2 and Figure 3 , the paddle 500 is installed in the lock housing 100 through the rotating shaft, and the linkage boss 420 on the square shaft 400 contacts one end of the paddle 500. When the square shaft 400 is rotated to drive the lock tongue 300 to retract, the linkage boss 420 pushes the paddle 500 to rotate, and the other end of the paddle 500 abuts and pushes the limiter 600 to move, so that the limiter boss 610 is separated from the limiter slot, thereby allowing the lock tongue 300 to retract smoothly when needed. The design of the paddle 500 makes the locking and unlocking process of the lock tongue 300 more flexible and controllable, meets the needs of different usage scenarios, ensures that the lock tongue 300 can be smoothly retracted when unlocked, and avoids the occurrence of jamming.
[0029] Reference Figure 1 , Figure 2 and Figure 3The lock housing 100 is provided with a guide groove 111, which is inclined away from the lock tongue 300. A guide column is provided at the bottom of the limiting ramp 210, and the guide column is clamped in the guide groove 111 to guide the safety tongue 200 to move away from the lock tongue 300 while retracting the lock housing 100, so that the first yielding portion 211 is separated from the second yielding portion 321. When the safety tongue 200 is subjected to external force (such as colliding with the door frame), the guide column slides along the guide groove 111, and guides the safety tongue 200 to move away from the lock tongue 300 while retracting the lock housing 100, so that the first yielding portion 211 is separated from the second yielding portion 321.
[0030] Reference Figure 1 , Figure 2 and Figure 3 , the first limiting portion 212 and the second limiting portion 322 are both arranged obliquely downward from the second opening 132 toward the second opening 132 to squeeze the lock tongue 300 out of the second opening 132. Further, the lock housing 100 is provided with a limiting plate 112, which is located in the installation cavity and at the end of the guide groove 111. The limiting plate 112 can abut and press the limiting ramp 210, so that the first limiting portion 212 squeezes the second limiting portion 322 to limit the retraction of the lock tongue 300. The limiting plate 112 is installed at the end of the guide groove 111, and is used to abut and press the limiting ramp 210 when the safety tongue 200 is fully retracted, further limiting the retraction of the lock tongue 300. The inclined limiting portion design enhances the squeezing effect on the lock tongue 300 and improves the anti-pry performance of the lock.
[0031] Reference Figure 1 The safety tongue 200 is provided with guide slopes 201 inclined from the center line to both sides, so that when the safety tongue 200 hits the door frame, the safety tongue 200 is guided to retract. The design of the guide slopes 201 inclined from the center line to both sides of the safety tongue 200 makes it easier to guide the safety tongue 200 to retract when it hits the door frame.
[0032] Reference Figure 1 The lock case 100 includes a bottom case 110, a panel 120 and a side plate 130, a first opening 131 and a second opening 132 are provided on the side plate 130, the bottom case 110 is a groove-shaped structure, the panel 120 is covered and provided on the bottom case 110, and the side plate 130 is connected to one side of the bottom case 110 and the panel 120. The modular design of the bottom case 110, the panel 120 and the side plate 130 makes the assembly and maintenance of the lock case 100 more convenient and quick.
[0033] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A pry-proof lock for a narrow door, characterized in that: include: A lock housing having an installation cavity therein, wherein a first opening and a second opening communicating with the installation cavity are provided on a side wall of the lock housing, wherein the first opening and the second opening are adjacently arranged; A safety tongue is slidably connected to the lock housing and is disposed through the first opening. The safety tongue is connected to a limiting inclined platform, and the limiting inclined platform is located in the installation cavity; A lock tongue is slidably connected to the lock housing and is arranged through the second opening. The lock tongue is connected to a driving plate, and the driving plate is located in the mounting cavity. A driving step is formed between the lock tongue and the driving plate. A trigger ramp is provided on a side wall of the driving plate close to the safety tongue. A reset step is formed between the trigger ramp and the driving plate, and the reset step and the driving step are arranged opposite to each other. A square shaft, used to connect to the handle and be driven by the handle, the square shaft is connected to a driving plate, and the driving plate can abut against the driving step or the reset step to drive the lock tongue to move toward or away from the outer side of the lock housing; The limiting ramp is located at the farthest end away from the first opening as the first giving part, the bottom wall located close to the lock tongue is the first limiting part, the triggering ramp is located at the top wall close to the safety tongue as the second limiting part, and the end located on the side facing the second opening is the second giving part. When the first giving part abuts against the second giving part, the safety tongue is fully extended out of the first opening, and the lock tongue partially extends out of the second opening. When the first limiting part abuts against the second limiting part, the safety tongue is partially retracted into the lock housing, and the lock tongue is fully extended out of the second opening. The limiting ramp squeezes the triggering ramp to limit the retraction of the lock tongue.
2. The anti-theft lock for narrow-body doors according to claim 1, characterized in that: The lock housing is slidably provided with a limiting member, the limiting member is provided with a limiting boss, and a limiting slot is provided at the bottom of the driving plate. When the first limiting portion abuts against the second limiting portion, the limiting member moves, and the limiting boss is inserted into the limiting slot to completely limit the retraction of the lock tongue.
3. The anti-theft lock for narrow-body doors according to claim 2, characterized in that: The lock shell is rotatably provided with a paddle, and the square shaft is provided with a linkage boss, and the two ends of the paddle can respectively abut the linkage boss and the limit member. When the square shaft abuts the reset step and drives the lock tongue to retract, the linkage boss drives the paddle to rotate, the paddle abuts the limit member, and drives the limit member to move, and the limit boss is separated from the limit slot.
4. The anti-theft lock for narrow-body doors according to claim 1, characterized in that: The lock housing is provided with a guide groove, and the guide groove is inclined in a direction away from the lock tongue. A guide column is provided at the bottom of the limiting ramp, and the guide column is clamped in the guide groove to guide the safety tongue to retract into the lock housing and move in a direction away from the lock tongue, and the first yielding portion is separated from the second yielding portion.
5. The anti-theft lock for narrow-body doors according to claim 4, characterized in that: The first limiting portion and the second limiting portion are both arranged obliquely downward from the second opening toward the second opening to press the locking tongue to extend out of the second opening.
6. The anti-theft lock for narrow-body doors according to claim 5, characterized in that: The lock housing is provided with a limit plate, which is located in the installation cavity and at the end of the guide groove. The limit plate can abut and press the limit ramp so that the first limit part squeezes the second limit part to limit the retraction of the lock tongue.
7. The anti-theft lock for narrow-body doors according to claim 1, characterized in that: The safety tongue is provided with guiding inclined surfaces inclined from the center line to both sides, so as to guide the safety tongue to retract when the safety tongue collides with the door frame.
8. The anti-theft lock for narrow-body doors according to claim 1, characterized in that: The lock shell includes a bottom shell, a panel and a side plate, the first opening and the second opening are arranged on the side plate, the bottom shell is a groove-shaped structure, the panel is covered on the bottom shell, and the side plate is connected to the bottom shell and one side of the panel.