A lock with an adaptive door frame thickness
By introducing elastic elements and guide structures into the lock, the lock can be adapted to different frame thicknesses, solving the problem of customized lock processing and achieving cost reduction and efficiency improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN DINGZHONG HARDWARE PROD CO LTD
- Filing Date
- 2025-08-25
- Publication Date
- 2026-08-04
AI Technical Summary
Existing locks require custom manufacturing to fit different bathroom door frames, resulting in a lack of universality, high costs, and low efficiency.
Design a lock that adapts to the thickness of the door frame. By inserting an elastic element between the handle assembly and the panel, the panel is driven to slide to adapt to different frame thicknesses. Combined with structures such as slots, abutments, and guide grooves, the panel and frame are kept in stable contact.
It enables the lock to adapt to various door frames without the need for CNC customization, reducing production costs, improving production efficiency, and ensuring structural stability and ease of installation.
Smart Images

Figure CN224591937U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of lock technology, and more specifically, it relates to a lock that adapts to the thickness of the door frame. Background Technology
[0002] In modern bathroom design, ultra-narrow frame bathroom doors are becoming increasingly popular due to their minimalist and stylish appearance and open, airy feel. These doors typically have frame widths of less than 15mm and, when paired with materials like tempered glass, enhance both the style and practicality of the bathroom space. However, current technology requires custom-made locks, which are not universally compatible, costly, and inefficient. To fit different door frames, the lock panel needs to be customized, usually through CNC machining to match specific bathroom door frames. This method results in locks that are not compatible with all types of bathroom door frames on the market, increasing production costs and impacting production efficiency. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides a lock that adapts to the thickness of the door frame, thus solving the technical problem that in the prior art, traditional lock panels need to be customized through CNC machining to fit different frames, resulting in the inability to be universally applicable to all bathroom door frames, leading to high costs and low efficiency.
[0004] The purpose and function of this utility model of a lock that adapts to the thickness of a door frame are achieved by the following specific technical means:
[0005] A lock that adapts to the thickness of a door frame includes handle assemblies symmetrically arranged on both sides of the door, and a panel sandwiched between each of the handle assemblies and the door.
[0006] An elastic element is sandwiched between the panel and the handle assembly. When the handle assembly is symmetrically installed and fixed, the elastic element drives the panel to slide towards the door frame, and the outer end of the panel abuts against the inner side of the door frame.
[0007] The above technical solution further includes an assembly plate embedded in the handle assembly, wherein the assembly plate is provided with a slot corresponding to the panel; the extension direction of the slot is consistent with the sliding direction of the panel;
[0008] The assembly plate is provided with a stop member, which is slidably embedded in the slot of the panel; the elastic member is sandwiched between the inner wall of the slot and the stop member.
[0009] The above technical solution further includes that the handle assembly includes a hollow handle body, the assembly plate is provided with an installation sleeve on the side away from the slot, and a corresponding connecting seat is provided inside the handle body. When the assembly plate is embedded in the handle body, the installation sleeve is sleeved on the connecting seat.
[0010] The above technical solution further includes that a limiting groove is provided in the handle body on the periphery of the connecting seat, and a limiting block is provided in the assembly plate corresponding to the limiting groove. The limiting block is installed in the limiting groove along with the mounting sleeve.
[0011] The above technical solution further includes a square connecting rod between the handle bodies on both sides of the door, with the two ends of the square connecting rod respectively passing through the connecting seats of the two sets of handle bodies.
[0012] The above technical solution further includes that the panel is provided with a guide groove, and the assembly plate is provided with two sets of guide members corresponding to the guide groove. When the assembly plate is installed on the panel, the two sets of guide members pass through the guide groove.
[0013] The above technical solution further includes that a cover plate is embedded on the side of the handle body away from the assembly plate.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. An elastic element is sandwiched between the panel and the handle assembly. After the handle assembly is installed and fixed, the elastic element drives the panel to slide towards the door frame, so that the outer end of the panel abuts against the inner side of the frame. This structure eliminates the need for CNC machining customization, adapting to door frames of different thicknesses and enabling universal installation on various door frames. This reduces customization steps, lowers production costs associated with customization, and avoids production delays caused by reprocessing to adapt to different frames, thereby improving production efficiency.
[0016] 2. The assembly plate features a slot and a stopper. The stopper slides into the slot on the panel, and an elastic element is sandwiched between the inner wall of the slot and the stopper. The panel has a guide groove, and a guide element passes through the assembly plate. These structures restrict the relative movement trajectory between the panel and the assembly plate, ensuring stable panel sliding. The handle assembly is connected via a mounting sleeve, connecting seat, limiting groove, and limiting block. A square connecting rod passes through the connecting seat, enhancing overall structural stability, reducing component loosening during use, lowering maintenance requirements, and ensuring the lock's continued effective function. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the assembled structure of this utility model.
[0018] Figure 2 yes Figure 1 A schematic diagram of the explosion structure.
[0019] Figure 3 This is a first exploded structural diagram of the handle assembly of this utility model.
[0020] Figure 4 This is a second exploded structural diagram of the handle assembly of this utility model.
[0021] Figure 5 This is an exploded structural diagram of the assembly plate and panel of this utility model.
[0022] Figure 6 This is a bottom view structural diagram of the assembly plate of this utility model.
[0023] Figure 7 This is a schematic diagram of the structure of the handle body of this utility model.
[0024] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0025] 1. Handle assembly; 2. Panel; 3. Elastic element; 4. Handle body; 201. Assembly plate; 202. Slot; 203. Abutment; 301. Mounting sleeve; 302. Connecting seat; 401. Limiting groove; 402. Limiting block; 501. Square connecting rod; 601. Guide groove; 602. Guide element; 701. Cover plate. Detailed Implementation
[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.
[0027] Example:
[0028] like Figures 1 to 7 As shown, a lock that adapts to the thickness of a door frame includes handle assemblies 1 symmetrically arranged on both sides of the door, and a panel 2 sandwiched between each handle assembly 1 and the door frame. An elastic element 3 is sandwiched between the panel 2 and the handle assembly 1. After the handle assemblies 1 are symmetrically installed and fixed, the elastic element 3 drives the panel 2 to slide towards the door frame, with the outer end of the panel 2 abutting against the inner side of the door frame. With the handle assembly 1 installed and fixed, the elastic element 3 generates a driving force, causing the panel 2 to move towards the door frame, so that the outer end of the panel 2 contacts the inner side of the door frame. This structure allows the lock to adapt to door frames of different thicknesses, eliminating the need to process the panel 2 for specific frame specifications, thus expanding the lock's applicability. Simultaneously, the driving force of the elastic element 3 ensures that the panel 2 always remains in contact with the door frame. Regardless of changes in the door frame thickness, adaptation can be achieved through the sliding of the panel 2, ensuring the lock's compatibility with door frames of different specifications and maintaining structural stability during use.
[0029] The elastic element 3 drives the panel 2 to abut against the inner side of the door frame, ensuring contact between the panel 2 and the frame. This eliminates the need for additional adjustments, reducing installation adjustments, simplifying the installation process, lowering installation difficulty, and improving ease of installation. This eliminates the need for CNC machining of the panel 2 to fit different frames, reducing customization and lowering material and processing costs associated with customization. It also avoids extended production cycles caused by customization, improving lock production efficiency and shortening product delivery time.
[0030] like Figures 2 to 6 As shown, a lock that adapts to the thickness of a door frame further includes an assembly plate 201 embedded in a handle assembly 1. The assembly plate 201 has a corresponding slot 202 on it, which extends in the same direction as the sliding direction of the panel 2. The assembly plate 201 has a stop 203, which is slidably embedded in the slot 202 of the panel 2. An elastic member 3 is sandwiched between the inner wall of the slot 202 and the stop 203. The slot 202 on the assembly plate 201, with the stop 203 slidably embedded within it, limits the relative movement direction between the panel 2 and the assembly plate 201. This ensures that the panel 2 slides only in a preset direction, preventing offset and ensuring that the outer end of the panel 2 abuts against the inner side of the door frame, guaranteeing a stable fit. The elastic member 3, sandwiched between the inner wall of the slot 202 and the stop 203, transmits its force to the panel 2 through the slot 202 and the stop 203. This ensures that the elastic element 3 is subjected to uniform force, and the driving force is stably applied to the panel 2, ensuring that the panel 2 slides smoothly and maintains reliable contact with the door frame.
[0031] The assembly plate 201 is embedded in the handle assembly 1. Through the cooperation of the slot 202 and the abutment 203, the panel 2 and the handle assembly 1 are connected as a whole, enhancing the connection stability of each component of the lock, preventing the components from separating during use, and ensuring the integrity of the overall lock structure. The abutment 203 slides within the slot 202, and in conjunction with the extension and retraction of the elastic element 3, provides adjustment space for the panel 2 to adapt to door frames of different thicknesses. This allows the sliding distance of the panel 2 to vary with the thickness of the frame, expanding the lock's adaptability range and improving compatibility with door frames of different specifications. The sliding cooperation between the slot 202 and the abutment 203 simplifies the assembly process of the panel 2 and the assembly plate 201. The connection between the two can be achieved without a complex fixing structure, facilitating rapid assembly during production and providing convenience for component disassembly during later maintenance, reducing operational difficulty.
[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, the handle assembly 1 includes a hollow handle body 4. An assembly plate 201 has a mounting sleeve 301 on the side away from the slot 202. A corresponding connecting seat 302 is provided inside the handle body 4. When the assembly plate 201 is embedded in the handle body 4, the mounting sleeve 301 is fitted onto the connecting seat 302. The mounting sleeve 301 on the assembly plate 201 and the connecting seat 302 inside the handle body 4, with the mounting sleeve 301 fitted onto the connecting seat 302, connect the assembly plate 201 and the handle body 4. This structure clearly defines the assembly positions of both, ensuring proper assembly and preventing misalignment from affecting overall function. The fitting of the mounting sleeve 301 and the connecting seat 302 limits the relative position of the assembly plate 201 and the handle body 4. When force is applied, the force is transmitted through the fitting structure, ensuring a stable connection, reducing loosening during use, and maintaining the stability of the lock structure.
[0033] The socket connection simplifies the assembly process between the assembly plate 201 and the handle body 4. No additional fasteners are required, improving assembly efficiency and facilitating disassembly for future maintenance or component replacement. The hollow structure of the handle body 4 provides space for the connection seat 302 and the mounting sleeve 301, resulting in a compact structure. This reduces the overall space required, adapts to different door installation environments, and protects internal components from external influences.
[0034] like Figures 5 to 7 As shown, a limiting groove 401 is provided in the handle body 4 on the periphery of the connecting seat 302. A limiting block 402 is provided on the assembly plate 201 corresponding to the limiting groove 401. The limiting block 402 is installed in the limiting groove 401 along with the mounting sleeve 301. A square connecting rod 501 is provided between the handle bodies 4 on both sides of the door. The two ends of the square connecting rod 501 pass through the connecting seats 302 of the two sets of handle bodies 4 respectively. The limiting groove 401 is provided on the periphery of the connecting seat 302, and the limiting block 402 is provided on the assembly plate 201. The limiting block 402 is installed in the limiting groove 401 along with the mounting sleeve 301. This limits the relative rotation of the assembly plate 201 and the handle body 4, ensuring that their positions are fixed and preventing angular displacement under force, thus ensuring assembly stability. The cooperation between the limiting groove 401 and the limiting block 402 enhances the connection strength between the assembly plate 201 and the handle body 4. It also distributes the load when transmitting force, reducing the stress concentration on the sleeve structure, lowering the risk of component deformation, and extending service life.
[0035] A square connecting rod 501 is installed between the main handles 4 on both sides of the door, with both ends passing through the connecting seats 302. This enables the linkage of the two handle assemblies 1, ensuring that when one handle is operated, the other side moves synchronously, guaranteeing the coordinated function of the lock. The cooperation between the square connecting rod 501 and the connecting seat 302 limits the relative position of the two handle main bodies 4. This prevents misalignment during installation, ensures overall structural symmetry, improves assembly accuracy, and reduces debugging steps. The limiting structure and the square connecting rod 501 work together to strengthen the overall rigidity of the lock. During use, all components work together to reduce shaking, maintain a stable connection between the lock and the door, and ensure continuous and effective function.
[0036] The door body is equipped with a fixed mounting bracket (not shown in the figure) for positioning and fixing the square connecting rod 501. The fixed mounting bracket is set in the positioning assembly slot of the door body, which can position and fix the square connecting rod 501, limit its displacement to ensure the linkage stability with the handle assembly 1, provide additional support to distribute the force and reduce deformation, simplify the assembly process, improve efficiency and ensure the fitting accuracy, enhance connection stability, reduce abnormal noise and friction wear, and extend the lock life.
[0037] like Figures 3 to 6 As shown, panel 2 has a guide groove 601, and assembly plate 201 has two sets of guide members 602 corresponding to the guide groove 601. When assembly plate 201 is installed on panel 2, the two sets of guide members 602 pass through the guide groove 601. Panel 2 has a guide groove 601, and assembly plate 201 has two sets of guide members 602, which pass into the guide groove 601. This limits the relative movement path of assembly plate 201 and panel 2, ensuring that they move only along the guide direction, avoiding deviation, and further ensuring fit; the two sets of guide members 602 are symmetrically distributed, balancing the force between assembly plate 201 and panel 2, preventing tilting caused by unilateral force. This makes panel 2 slide smoothly, ensures that elastic member 3 is subjected to uniform force, maintains stable driving force, and ensures reliable contact between panel 2 and frame.
[0038] The guide component 602 cooperates with the guide groove 601 to enhance the connection stability between the assembly plate 201 and the panel 2. When the assembly plate 201 is subjected to force, the force is transmitted through the guide component 602, reducing friction between components, reducing wear, and extending service life. The guide structure simplifies the assembly process of the assembly plate 201 and the panel 2, allowing installation to be completed without repeated alignment, improving assembly efficiency, and facilitating later disassembly and maintenance, reducing operational difficulty.
[0039] like Figures 3 to 7 As shown, a cover plate 701 is embedded on the side of the handle body 4 away from the assembly plate 201. The cover plate 701 closes the end opening of the handle body 4, preventing external dust and moisture from entering the interior, protecting the internal components and maintaining their performance; at the same time, the cover plate 701 covers the end structure of the handle body 4, hiding the internal connection parts, making the handle body 4 look complete and improving the overall neatness.
[0040] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A lock that adapts to the thickness of a door frame, characterized in that: The door includes handle assemblies (1) symmetrically arranged on both sides of the door body, and a panel (2) sandwiched between each handle assembly (1) and the door body; an elastic element (3) is sandwiched between the panel (2) and the handle assembly (1). When the handle assembly (1) is symmetrically installed and fixed, the elastic element (3) drives the panel (2) to slide towards the door frame, and the outer end of the panel (2) abuts against the inner side of the door frame.
2. The lock with adaptive door frame thickness according to claim 1, characterized in that: It also includes an assembly plate (201) embedded in the handle assembly (1), the assembly plate (201) having a slot (202) corresponding to the panel (2); the slot (202) extending in the same direction as the sliding direction of the panel (2); the assembly plate (201) having a stop (203), the stop (203) being slidably embedded in the slot (202) of the panel (2); the elastic member (3) being sandwiched between the inner wall of the slot (202) and the stop (203).
3. The lock with adaptive door frame thickness according to claim 2, characterized in that: The handle assembly (1) includes a hollow handle body (4), and the assembly plate (201) is provided with an installation sleeve (301) on the side away from the slot (202). The handle body (4) is provided with a corresponding connecting seat (302). When the assembly plate (201) is embedded in the handle body (4), the installation sleeve (301) is sleeved on the connecting seat (302).
4. The lock with adaptive door frame thickness according to claim 3, characterized in that: A limiting groove (401) is provided in the handle body (4) on the periphery of the connecting seat (302), and a limiting block (402) is provided on the assembly plate (201) corresponding to the limiting groove (401). The limiting block (402) is installed in the limiting groove (401) along with the mounting sleeve (301).
5. A lock with adaptive door frame thickness according to claim 4, characterized in that: A square connecting rod (501) is provided between the handle bodies (4) on both sides of the door, and the two ends of the square connecting rod (501) are respectively inserted into the connecting seats (302) of the two sets of handle bodies (4).
6. A lock with adaptive door frame thickness according to claim 2, characterized in that: The panel (2) is provided with a guide groove (601), and the assembly plate (201) is provided with two sets of guide members (602) corresponding to the guide groove (601). When the assembly plate (201) is installed on the panel (2), the two sets of guide members (602) pass through the guide groove (601).
7. A lock with adaptive door frame thickness according to claim 3, characterized in that: A cover plate (701) is embedded on the side of the handle body (4) away from the assembly plate (201).