A door lock

Abstract

The utility model discloses a door lock that can realize single-hand operation automatic door opening, including fixed lock bolt, lock catch subassembly and lock catch control subassembly. The fixed lock bolt is fixed in the door inner side and rotates with the door, the lock catch subassembly is arranged in the door inner side, has the fastening and release state, and is in the fastening state when closing the door, the lock catch control subassembly is arranged in the door outer side, is connected and controls the lock catch subassembly through the flexible traction piece. When operating, the user only needs single-hand trigger door outer operating element, can make the lock catch subassembly switch from fastening to release state through the traction of flexible traction piece, in this process, the internal elastic element of lock catch subassembly stores energy and releases, pushes the fixed lock bolt and automatically pops out, thereby drives the door leaf to rotate and separates the closed state, realizes the coherent action of unlocking and door opening. The door lock is reasonable in structure, convenient to operate, high in reliability, effectively solves the use pain point that traditional door lock needs double-hand operation and cannot automatically pop open, and significantly improves the user experience.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a door lock capable of realizing a continuous "operation-unlocking-spring-opening" action. Background Technology

[0002] Traditional door locks suffer from a long-standing, unresolved core flaw in terms of user experience and operational logic: when a user unlocks the door using one hand via the external mechanism, the door cannot automatically spring open using the internal mechanism; the user still needs to apply pushing force with their other hand to open it. This "hand-free" problem leads to significant operational inconvenience and a disconnect in user experience during everyday scenarios such as holding objects or infants, demonstrating a clear deficiency in human-centered design and functional integration.

[0003] Existing door lock latching mechanisms are limited to mechanical locking and unlocking functions. Their design philosophy remains stuck in a binary "lock-release" state switching, failing to incorporate "release kinetic energy transmission" and "door movement assistance" into the system considerations. Therefore, even if a user successfully operates the external locking components, additional external force must be applied to overcome the sealing resistance of the door gap or the static friction of the hinge, making truly seamless one-handed operation impossible. A mature solution that truly achieves a continuous "operation-unlock-release" action with structural stability and long service life remains a technological blind spot that the industry urgently needs to overcome.

[0004] To address the aforementioned problems, this utility model provides a door lock that effectively solves the issues of existing door locks being stuck in a binary state switching of "lock-release", ultimately enabling the entire unlocking and opening process to be completed with only one hand operating from outside the door. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a door lock that, through an innovative integrated design of the latch mechanism and elastic drive, can automatically release stored energy and push the door away from the locked position when the latch control component is triggered. Ultimately, the entire unlocking and opening process can be completed with only one hand outside the door, greatly improving the ease of use and the level of product experience.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A door lock for locking or releasing a door, the door including an inner side, an outer side, and a mounting through-hole through the inner and outer sides, the door lock comprising:

[0008] A fixed bolt is fixedly connected to the inside of the door and is configured to rotate as the door rotates;

[0009] A latch assembly is fixedly connected to the inside of the door, and the latch assembly includes a latched state and a released state. When the door is closed, the latch assembly is in the latched state, and the fixing bolt is latched by the latch assembly.

[0010] A latch control assembly is fixedly connected to the outside of the door. When the door is closed, the latch control assembly can switch the latch assembly from the latched state to the released state. During the process of the latch assembly changing from the latched state to the released state, the fixed bolt automatically pops out of the latch assembly and drives the door to rotate to disengage from the closed state.

[0011] The beneficial effects of this utility model are as follows: Through the above-mentioned structural design, the door lock design involved in this application realizes single-handed operation and automatic door opening function. The user only needs to operate the latch control component on the outside of the door to trigger the interlock action. When the latch component switches from the latched state to the released state, the fixed bolt will automatically pop out and directly drive the door leaf to rotate out of the closed state, completely solving the pain point of traditional door locks that require one hand to unlock and the other hand to push the door, realizing truly convenient single-handed operation, greatly improving the user experience, and is especially suitable for daily scenarios such as carrying objects and holding infants; at the same time, its structure is reasonable and its action is reliable. Through the ingenious mechanism design of the internal elastic element, moving element and fixed element of the latch component, the action is guaranteed. The design is consistent and streamlined, reducing the complexity of traditional transmission mechanisms, lowering the failure rate, and improving the overall reliability and lifespan of the door lock. Furthermore, the design offers high security and clear status indicators; the latch assembly has clearly defined locking and unlocking states, automatically maintaining the lock when the door is closed to prevent accidental opening, ensuring door security and sealing. State transitions require specific operations with clear intent, preventing misoperation. Moreover, it is highly versatile and adaptable; the core mechanism has relatively low dependence on door thickness. Major components are installed on the inner and outer sides of the door and connected by a flexible traction component that runs through the door body, reducing the need for customized production of key components for different door thicknesses and simplifying production, inventory management, and installation adaptation processes. In summary, this application not only revolutionizes the operation of door locks but also provides comprehensive optimization in terms of reliability, security, and adaptability, possessing outstanding practical value and market competitiveness. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In addition, the drawings are not drawn to a 1:1 scale, and the relative dimensions of each component are only illustrated in the drawings and are not necessarily drawn to the actual scale.

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of the door lock of this utility model from the first angle;

[0015] Figure 2 This is a schematic diagram of the overall structure of the door lock from the second angle of this utility model;

[0016] Figure 3 This is an exploded structural diagram of the door lock of this utility model from a first angle;

[0017] Figure 4 This is an exploded view of the door lock of this utility model from a second angle;

[0018] Figure 5 This is an enlarged schematic diagram of the door lock part of this utility model;

[0019] Figure 6 This is a partial structural diagram of the door lock of this utility model when the first abutting part 2212 (including the first fastening position 2212a, the second fastening position 2212b and the release position 2212c) and the second abutting part 2222 abut against each other without any other external force.

[0020] Figure 7 This is a first-view exploded structural diagram of the door lock latch control assembly 300 of this utility model;

[0021] Figure 8 This is a first-view exploded structural diagram of the door lock latch control assembly 300 of this utility model;

[0022] Figure 9 This is a structural diagram of Gate 10;

[0023] Figure 10 This is a schematic diagram of the structure of the door lock of this utility model when the first abutting part 2212 is in the first fastening position 2212a and the second abutting part 2222 abut against each other under the condition that there is no other external force acting on them, and is installed at the first angle of the door 10.

[0024] Figure 11 This is a schematic diagram of the structure of the door lock of this utility model when the first abutting part 2212 is in the first fastening position 2212a and the second abutting part 2222 abut against each other under the condition that no other external force is applied;

[0025] Figure 12This is a schematic diagram of the structure of the door lock of this utility model, in which the first abutting part 2212 and the second abutting part 2222 abut against each other at an angle when they are installed on the door 10 without any other external force.

[0026] Figure 13 This is a schematic diagram of the structure of the door lock of this utility model when the first abutting part 2212 is in the released position 2212c and the second abutting part 2222 abuts against each other under the condition that no other external force is applied;

[0027] Figure 14 yes Figure 10 Enlarged view of circle A;

[0028] Figure 15 yes Figure 12 Enlarged view of circle B;

[0029] Figure 16 yes Figure 13 Enlarged view of circle C.

[0030] Figure label:

[0031] 100. Fixed bolt; 200. Locking assembly; 300. Locking control assembly; 110. Bolt part; 120. Grip part; 130. Connecting part; 210. Fixing element; 211. Housing; 2111. Housing body; 2111a. Guide groove; 2111b. Button mounting hole; 2112. Housing cover; 212. Inner housing; 2121. First mounting shaft; 2122. Second mounting shaft; 2123. Locking mating part; 2124. Abutting and limiting part; 213. Accommodating space; 220. Movable element; 221. Fastening member; 2211. First pre-tightening abutting part; 2212. First abutting part; 2212a. First fastening position; 2212b. Second fastening position; 2212c. Release position; 2213 1. Locking part; 2214. Third abutment part; 222. Control component; 2221. Second pre-tightening abutment part; 2222. Second abutment part; 2223. Control part; 2223a. Connecting through hole; 230. Elastic element; 240. Control button; 241. Guide rib; 310. Flexible traction component; 311. Control connection end; 312. Locking connection end; 320. Mounting base; 321. Mounting channel; 322. Third pre-tightening abutment part; 330. Operating element; 331. Mounting hole; 332. Spiral fastener; 333. Connecting component; 3331. Auxiliary groove; 334. Gripping component; 335. Fourth pre-tightening abutment part; 340. Pre-tightening spring; 10. Door; 11. Inner side; 12. Outer side; 13. Mounting through hole. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0038] Reference Figures 1 to 16 A door lock for locking or releasing a door 10, the door 10 including an inner side 11, an outer side 12, and a mounting through hole 13 through the inner side 11 and the outer side 12, the door lock comprising:

[0039] A fixing bolt 100 is fixedly connected to the inner side 11 of the door 10 and is configured to rotate as the door 10 rotates;

[0040] The latch assembly 200 is fixedly connected to the inner side 11 of the door 10, and the latch assembly 200 includes a fastened state and a released state. When the door 10 is closed, the latch assembly 200 is in the fastened state, and the fixing bolt 100 is fastened by the latch assembly 200.

[0041] A latch control assembly 300 is fixedly connected to the outer side 12 of the door 10. When the door 10 is in the closed state, the latch control assembly 300 can switch the latch assembly 200 from the latched state to the released state. During the process of the latch assembly 200 changing from the latched state to the released state, the fixed bolt 100 automatically pops out from the latch assembly 200 and drives the door 10 to rotate to disengage from the closed state.

[0042] With the above-described structure, during use, the user only needs to operate the latch control component 300 on the outside 12 of the door 10 to trigger a continuous automatic process: the latch component 200 switches states → the fixed bolt 100 automatically pops out → the door 10 is opened by the pushing force. This completely solves the pain point of traditional door locks requiring "one hand to unlock and the other hand to push the door," greatly improving the convenience of use, especially suitable for everyday scenarios such as holding objects with both hands or holding a baby. The components on the inside and outside 12 of the door are organically linked through a mechanical structure (such as a flexible traction component). The operating force from outside the door is precisely transmitted to inside the door, and through the energy storage and release of the internal mechanism (such as an elastic element) of the latch component 200, it is converted into the power to push the fixed bolt 100 out. This design has clear actions, rapid response, and high reliability, reducing the number of failure points. When the door 10 is closed, the latch component 200 can automatically enter and remain in the locked state, firmly locking the fixed bolt 100. This provides the door with reliable locking force, effectively preventing accidental opening due to wind, vibration, or unexpected impacts, thus ensuring safety and privacy. The entire operation is intuitive: a single action from the outside completes the opening. Users can clearly perceive the status feedback upon completion of the operation (such as hearing the bolt pop out or seeing the door begin to rotate), making the interaction simple and clear. Furthermore, this design typically requires a specific and intentional action to unlock, avoiding potential security risks from accidental operation. In summary, the core function of this technical solution lies in seamlessly integrating the unlocking and opening actions through an ingenious mechanical design, providing a more convenient, user-friendly, and secure door lock solution.

[0043] In this embodiment, the latch assembly 200 includes a fixed element 210, a movable element 220, and an elastic element 230. The fixed element 210 is fixedly connected to the inner side 11 of the door 10, and the movable element 220 is rotatably connected to the fixed element 210. The movable element 220 has a latched state and a released state. During the process of the movable element 220 changing from the latched state to the released state, the elastic element 230 applies an elastic force to the fixed bolt 100 through the movable element 220, causing the fixed bolt 100 to automatically pop out of the latch assembly 200 and drive the door 10 to rotate and disengage from the closed state. With the above structure, the energy stored in the elastic element 230 does not come from the user's operation when opening the door, but is automatically completed during the closing process. The user's operation on the outside of the door 12 is merely a trigger signal to release the pre-stored energy. This greatly simplifies the effort required for the user to open the door, achieving true "effortlessness". Users only need a very light triggering force (such as pulling) to release the large energy stored when closing the door and open it, providing a very light and efficient experience. It's important to note that this design completely separates the "energy storage" and "release" actions in time. Since the elastic energy originates from the natural action of the door closing, the amount of energy stored (i.e., the degree of torsion of the elastic element 230) is determined by the closed state of the door, providing a basically consistent energy reserve with each closing. This ensures stable and reliable automatic door opening force and effect. Regardless of the speed or force applied by the user operating the external door components, an effective automatic door opening action is achieved, avoiding situations where the door is weak or fails to open due to improper user operation. The high-intensity, long-stroke energy storage process is combined with the natural action of closing the door, while the light, short-stroke triggering action is reserved for the opening operation. This design rationally distributes the stress conditions of the mechanical components. The components undertaking the main energy storage task (such as the elastic element 230) experience slow, one-time stress; while the external door operating components (such as handles and buttons) only bear a very small triggering force. This extends the service life of all components and makes the force flow design of the entire system more scientific and durable. In summary, the core function of this technical solution is no longer simply "opening the door with an elastic element," but rather, through the ingenious separation of "closing energy storage - operation release," it achieves the most stable and powerful automated door opening effect with minimal user operation cost, while also achieving excellent levels in structural reliability and user experience.

[0044] In this embodiment, the fixing element 210 includes an outer shell 211 and an inner shell 212. The outer shell 211 is fixedly connected to the inner side 11 of the door 10, and the outer shell 211 has a receiving space 213. The inner shell 212 is disposed within the receiving space 213, and the movable element 220 is rotatably connected to the inner shell 212. With this structure, in use, the outer shell 211 acts as the first barrier directly installed outside the door, effectively protecting the inner shell 212 and the movable element 220, preventing dust, foreign objects from entering, or human-caused damage, thus improving the product's durability and reliability. The inner shell 212 is pre-assembled as an independent module with the movable element 220 and other components pre-assembled, and then placed entirely within the receiving space 213 of the outer shell 211. This greatly simplifies the on-site installation and subsequent maintenance process, improving production and installation efficiency. The inner housing 212 provides a robust and precise mounting base for the rotation of the moving element 220, ensuring the accuracy and consistency of the movement trajectory of the moving element 220, thereby guaranteeing the reliable execution of the locking and releasing actions. The outer housing 211 is composed of the outer housing body 2111 and the outer housing cover 2112. The outer housing body 2111 is provided with a guide groove 2111a and a button mounting hole 2111b.

[0045] In this embodiment, the inner housing 212 is provided with a first mounting shaft 2121 and a second mounting shaft 2122. The movable element 220 includes a fastening member 221 and a control member 222. The fastening member 221 is rotatably connected to the first mounting shaft 2121, and the control member 222 is rotatably connected to the second mounting shaft 2122. The elastic element 230 abuts against the fastening member 221 and the control member 222, so that the fastening member 221 and the control member 222 abut against each other without any other external force. With the above structure, in use, by subdividing the movable element 220 into the fastening member 221 and the control member 222, and installing them on the first mounting shaft 2121 and the second mounting shaft 2122 respectively, the locking function (performed by the fastening member 221) and the control triggering function (performed by the control member 222) are separated. The two components are coupled by the preload of the elastic element 230, enabling a light operating force (acting on the control component 222) outside the door to reliably trigger a powerful latch release action (executed by the latching component 221) inside the door. This achieves a "small effort, big result" effect, optimizing the functional separation and force transmission structure. The elastic element 230 continuously applies a preload to the latching component 221 and the control component 222, forcing them to abut against each other. This design ensures that the entire mechanism can automatically maintain or return to a predetermined stable state when there is no external interference, improving the reliability and consistency of operation. Two independent mounting shafts provide dedicated and stable rotation centers for the two components, avoiding motion interference and making their rotation smoother and more precise, thereby improving the accuracy and durability of the entire latch assembly 200.

[0046] In this embodiment, the fastening member 221 is provided with a first pre-tightening abutment portion 2211 and a first abutment portion 2212, the control member 222 is provided with a second pre-tightening abutment portion 2221 and a second abutment portion 2222, the elastic element 230 abuts against the first pre-tightening abutment portion 2211 and the second pre-tightening abutment portion 2221, and applies an elastic pre-tightening force to the first pre-tightening abutment portion 2211 and the second pre-tightening abutment portion 2221, so that the first abutment portion 2212 and the second abutment portion 2222 abut against each other under the condition that no other external force is applied. With the above-mentioned structure, in use, the first pre-tightening abutment part 2211 and the second pre-tightening abutment part 2221 are set to accurately bear the pre-tightening force of the elastic element 230, and the mutual abutment of the first abutment part 2212 and the second abutment part 2222 is used to transmit movement and maintain the state. Its core function is to optimize the transmission path of the elastic pre-tightening force, ensure the accuracy and stability of the linkage relationship between the fastening member 221 and the control member 222, so that a light operating force from outside the door can reliably trigger the powerful release of the door bolt, realizing labor-saving and reliable one-handed automatic door opening.

[0047] In this embodiment, the fastening member 221 is further provided with a locking part 2213, and the inner shell 212 is further provided with a locking engagement part 2123. The first abutting part 2212 includes a first fastening position 2212a, a second fastening position 2212b, and a release position 2212c. When the first abutting part 2212 and the second abutting part 2222 abut against each other at the first fastening position 2212a and the second fastening position 2212b respectively, the locking engagement part 2123 couples with the locking part 2213, thereby... The fixing bolt 100 is fastened between the locking engagement part 2123 and the locking part 2213, so that the locking assembly 200 is in a fastened state; when the first abutting part 2212 and the second abutting part 2222 abut against each other in the release position 2212c, the locking engagement part 2123 and the locking part 2213 are decoupled, thereby automatically ejecting the fixing bolt 100 from between the locking engagement part 2123 and the locking part 2213, so that the locking assembly 200 is in a released state. With the above-described structure, during use, a stable, reliable, and fault-tolerant bistable latch structure is constructed by setting the coupling and decoupling mechanism between the latch part 2213 and the latch mating part 2123, as well as multiple precise positioning points of the first abutment part 2212. In particular, the setting of the second fastening position 2212b can effectively adapt to the misalignment and unevenness that may occur when the gate is closed, ensuring that the latch assembly 200 can still firmly fasten the fixing bolt 100 under non-ideal conditions, and can instantly decouple and release after triggering, reliably and automatically opening the gate leaf, greatly improving the adaptability and reliability of the product in practical applications.

[0048] In this embodiment, the fastening member 221 is further provided with a third abutting part 2214, the control member 222 is further provided with a control part 2223, and the inner shell 212 is further provided with an abutting limiting part 2124. When the control part 2223 is subjected to external force, the control member 222 rotates against the elastic pre-tightening force provided by the elastic element 230 until it disengages from the abutting state with the first abutting part 2212. At this time, the abutting limiting part 2124 abuts against the third abutting part 2214, and the locking assembly 200 is in a released state. If the external force is removed at this time, the first abutting part 2212 and the second abutting part 2222 remain abutting at the released position 2212c under the drive of the elastic pre-tightening force. With the above-described structure, during use, the coordinated mechanism of the third abutment part 2214, the control part 2223, and the abutment limiting part 2124 not only achieves stable maintenance of the release state, but more importantly, during the subsequent closing process, this coordinated mechanism can guide the fastening member 221 and the control member 222 to automatically and reliably recouple and lock in the first fastening position 2212a or the second fastening position 2212b, thereby enabling the elastic element 230 to complete energy storage and prepare for the next automatic door opening, realizing the cyclic automation from "release" to "re-energy storage".

[0049] In this embodiment, the latch control assembly 300 includes a flexible traction member 310, a mounting base 320, and an operating element 330. The operating element 330 is movably connected to the mounting base 320, and the mounting base 320 is fixedly connected to the outer side 12 of the door 10. The control unit 2223 is provided with a connecting through hole 2223a. The flexible traction member 310 includes a control connecting end 311 and a latch connecting end 312. The latch connecting end 312 is connected to the control unit 2223 through the connecting through hole 2223a, and the control connecting end 311 passes through the mounting through hole 13 and is connected to the operating element 330. The flexible traction member 310 is pulled by the operating element 330. The traction member 310 and the control unit 2223 drive the control member 222 to rotate against the elastic preload provided by the elastic element 230 until it disengages from the first contact part 2212, and finally switches the latch assembly 200 from the fastened state to the released state. During the process of the latch assembly 200 changing from the fastened state to the released state, the latch mating part 2123 and the latch part 2213 are decoupled. Under the action of the elastic preload provided by the elastic element 230, the fixing bolt 100 automatically pops out from between the latch mating part 2123 and the latch part 2213, and drives the door 10 to rotate to disengage from the closed state. With the above-mentioned structure, during use, the flexible traction component 310 connects the external operating element 330 and the internal control unit 2223, transforming the user's simple external pulling operation into precise control of the internal mechanism of the latch assembly 200, thereby triggering the latch release in a light and effortless manner. This design effectively utilizes the pre-stored energy of the elastic element 230, realizing the automatic ejection of the fixed bolt 100 and the smooth opening of the door leaf, while simplifying the mechanical linkage between the internal and external mechanisms, and improving installation adaptability and ease of operation.

[0050] In this embodiment, the operating element 330 is provided with a mounting hole 331 and a spiral fastener 332. After the control connection end 311 is inserted into the mounting hole 331, it is fixedly connected to the operating element 330 by the spiral fastener 332. With the above structure, in use, the simple cooperation between the mounting hole 331 and the spiral fastener 332 achieves a firm and adjustable connection between the flexible traction member 310, the control connection end 311, and the operating element 330, ensuring efficient and reliable transmission of operating force from outside the door to inside the door, while greatly facilitating installation and subsequent maintenance and replacement.

[0051] In this embodiment, the operating element 330 includes a connecting member 333 and a gripping member 334, which are connected by threads. With this structure, during use, the operating element 330 is divided into the threaded connecting member 333 and the gripping member 334, achieving separation of installation / adjustment and operation functions. This structure facilitates precise adjustment of the tightness of the flexible traction member 310 by rotating the gripping member 334, ensuring effective transmission of operating force, and also allows for independent replacement of the gripping member 334, improving modularity and maintenance convenience.

[0052] In this embodiment, the locking control assembly 300 further includes a preload spring 340. The mounting base 320 is provided with a mounting channel 321. After the preload spring 340 is sleeved on the connecting member 333, it passes through the mounting channel 321 along with the connecting member 333 and is threadedly connected to the gripping member 334. With the above structure, in use, the operating element 330 is modularized into the connecting member 333 and the gripping member 334 through the threaded connection. While maintaining structural compactness, this achieves independent replaceability of the gripping member 334, reducing maintenance costs.

[0053] In this embodiment, the mounting base 320 is provided with a third pre-tightening abutment part 322, which is located at the end of the mounting channel 321 away from the door 10, and the inner diameter of the third pre-tightening abutment part 322 is smaller than the inner diameter of the mounting channel 321; the operating element 330 is provided with a fourth pre-tightening abutment part 335, which is located at the end of the connecting member 333 near the door 10, and the outer diameter of the fourth pre-tightening abutment part 335 is smaller than the inner diameter of the mounting channel 321, and the outer diameter of the fourth pre-tightening abutment part 335 is larger than the inner diameter of the third pre-tightening abutment part 322; the two ends of the pre-tightening spring 340 abut against the third pre-tightening abutment part 322 and the fourth pre-tightening abutment part 335 respectively. With the above structure, during use, the third pre-tightening contact part 322 and the fourth pre-tightening contact part 335 precisely limit and support the pre-tightening spring 340, providing an automatic reset force for the operating element 330, ensuring that it can automatically return to the initial position after operation, while providing clear tactile feedback for operation outside the door, and maintaining the structural compactness and stability of the entire operating mechanism.

[0054] In this embodiment, the connecting member 333 is provided with an auxiliary groove 3331. The auxiliary groove 3331 is used to prevent the connecting member 333 from rotating when it is threadedly connected to the gripping member 334. With the above-described structure, by providing the auxiliary groove 3331 on the connecting member 333 during use, relative rotation is effectively prevented when it is threadedly assembled with the gripping member 334. This ensures the relative position stability of the preload spring 340 and its internal structure during assembly, thereby guaranteeing the assembly accuracy and overall reliability of the operating element 330.

[0055] In this embodiment, the fixing bolt 100 includes a bolt portion 110, a gripping portion 120, and a connecting portion 130. Through this structural design, in use, the fixing bolt 100 is modularly designed as a bolt portion 110, a gripping portion 120, and a connecting portion 130, achieving functional integration and structural optimization. The bolt portion 110 directly participates in the latch engagement, ensuring locking reliability. The gripping portion 120 provides a leverage point for manual operation (such as manually closing the door), enhancing practicality. The connecting portion 130 ensures a secure installation with the door body, thus improving the overall functionality, usability, and assembly stability of the components.

[0056] In this embodiment, the elastic element 230 is a torsion spring. With the above-described structure, the torsion spring, used as the elastic element 230, leverages its ability to provide elastic force in the rotational direction to provide stable and reliable torque for the rotation and reset of the fastening member 221 and the control member 222. This ensures the precision and smoothness of the locking assembly 200's movement when switching between fastening and releasing states. Furthermore, its compact structure is highly suitable for the internal mechanism in this design, which primarily relies on rotational motion.

[0057] In this embodiment, the latch assembly 200 further includes a control button 240. The outer casing 211 is provided with a button mounting hole 2111b. The control button 240 passes through the button mounting hole 2111b from the inner side 11 of the receiving space 213 and is movably connected to the outer casing 211. One end of the control button 240 within the receiving space 213 abuts against the control unit 2223. With this structure, by adding the control button 240 that directly abuts against the control unit 2223, users are provided with a manual triggering method to release the latch assembly 200 from the inner side 11 of the door. This enhances the convenience and security of the product and integrates dual control functions both inside and outside the door.

[0058] In this embodiment, the control button 240 is provided with multiple guide ribs 241, and the outer shell 211 is provided with multiple guide grooves 2111a. The control button 240 and the outer shell 211 are slidably connected to the guide ribs 241 through the guide grooves 2111a. With this structure, during use, the sliding cooperation between the guide ribs 241 and the guide grooves 2111a ensures that the control button 240 moves smoothly in a straight line within the outer shell 211, effectively preventing the control button 240 from deflecting or jamming during pressing, thereby improving the smoothness of operation, the consistency of feel, and the durability of the components.

[0059] In this embodiment, the pressing portion of the control button 240 protruding from the outer casing 211 is hemispherical. With this structural design, the hemispherical shape of the pressing portion of the control button 240 not only conforms to ergonomics to improve pressing comfort, but more importantly, the hemispherical protrusion makes it difficult for outsiders to apply force or pry it open with tools, effectively increasing the difficulty of unauthorized operation from the outside 12 and significantly enhancing the door lock's anti-vandalism and anti-theft performance.

[0060] In this embodiment, the outer casing 211 is made of zinc alloy. By using the aforementioned structure, zinc alloy is chosen as the material for the outer casing 211 primarily due to its excellent corrosion resistance and rust prevention. It effectively resists moisture in the air and corrosive substances encountered during daily use, ensuring that the latch assembly 200 maintains its appearance integrity and internal structural reliability in harsh environments such as humid conditions, thus greatly extending the product's service life. Using zinc alloy as the material for the outer casing 211 also fully utilizes its high strength, high hardness, and excellent casting properties, providing robust external protection for the latch assembly 200. It effectively resists external impacts and prying, significantly enhancing the product's anti-theft security and overall durability. Furthermore, its good processing characteristics facilitate the molding and manufacturing of complex outer casing structures.

[0061] In this embodiment, the outer shell 211 is fixedly connected to the inner side 11 of the door 10 by threaded fasteners. With the above structure, during use, the outer shell 211 is fixedly connected to the outer side 12 of the door 10 by threaded fasteners, ensuring the firmness and stability of the latch assembly 200 installation and effectively preventing loosening due to vibration or impact during use. This connection method also has the advantages of high standardization and easy disassembly, facilitating later maintenance and replacement.

[0062] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the protection scope of this utility model.

Claims

1. A door lock for locking or releasing a door (10), said door (10) comprising an inner side (11), an outer side (12), and a mounting through hole (13) penetrating the inner side (11) and the outer side (12), characterized in that, The door lock includes: A fixing bolt (100) is fixedly connected to the inside (11) of the door (10) and is configured to rotate with the rotation of the door (10); The latch assembly (200) is fixedly connected to the inner side (11) of the door (10), and the latch assembly (200) includes a latched state and a released state. When the door (10) is closed, the latch assembly (200) is in the latched state, and the fixed bolt (100) is latched by the latch assembly (200). A latch control assembly (300) is fixedly connected to the outside (12) of the door (10). When the door (10) is in the closed state, the latch control assembly (300) can switch the latch assembly (200) in the latched state to the released state. During the process of the latch assembly (200) changing from the latched state to the released state, the fixed bolt (100) automatically pops out from the latch assembly (200) and drives the door (10) to rotate to disengage from the closed state.

2. The door lock according to claim 1, characterized in that, The latch assembly (200) includes a fixed element (210), a movable element (220), and an elastic element (230). The fixed element (210) is fixedly connected to the inner side (11) of the door (10). The movable element (220) is rotatably connected to the fixed element (210). The movable element (220) has a latched state and a released state. During the process of the movable element (220) changing from the latched state to the released state, the elastic element (230) applies an elastic force to the fixed bolt (100) through the movable element (220), so that the fixed bolt (100) automatically pops out from the latch assembly (200) and drives the door (10) to rotate to disengage from the closed state. The fixed element (210) includes an outer shell (211) and an inner shell (212). The outer shell (211) is fixedly connected to the inner side (11) of the door (10). The outer shell (211) is provided with a receiving space (213), and the inner shell (212) is disposed in the receiving space (213). The movable element (220) is rotatably connected to the inner shell (212). The inner shell (212) is provided with a first mounting shaft (2121) and a second mounting shaft (2122). The movable element (220) includes a fastening member (221) and a control member (222). The fastening member (221) is rotatably connected to the first mounting shaft (2121), and the control member (222) is rotatably connected to the second mounting shaft (2122). The elastic element (230) abuts against the fastening member (221) and the control member (222) so that the fastening member (221) and the control member (222) abut against each other without any other external force.

3. The door lock according to claim 2, characterized in that, The fastening member (221) is provided with a first pre-tightening abutment portion (2211) and a first abutment portion (2212), and the control member (222) is provided with a second pre-tightening abutment portion (2221) and a second abutment portion (2222). The elastic element (230) abuts against the first pre-tightening abutment portion (2211) and the second pre-tightening abutment portion (2221) and applies an elastic pre-tightening force to the first pre-tightening abutment portion (2211) and the second pre-tightening abutment portion (2221) so that the first abutment portion (2212) and the second abutment portion (2222) abut against each other without any other external force. 21) A locking part (2213) is also provided, and the inner housing (212) is also provided with a locking engagement part (2123). The first abutting part (2212) includes a first fastening position (2212a), a second fastening position (2212b), and a release position (2212c). When the first abutting part (2212) and the second abutting part (2222) abut against each other at the first fastening position (2212a) and the second fastening position (2212b), the locking engagement part (2123) is coupled with the locking part (2213), thereby fastening the fixing bolt (100) to the locking engagement part (2123) and the locking engagement part (2123). The locking parts (2213) are positioned such that the locking assembly (200) is in a locked state; when the first abutting part (2212) and the second abutting part (2222) abut in the released position (2212c), the locking engaging part (2123) is decoupled from the locking part (2213), thereby automatically ejecting the fixing bolt (100) from between the locking engaging part (2123) and the locking part (2213), so that the locking assembly (200) is in a released state; the fastening member (221) is also provided with a third abutting part (2214), and the control member (222) is also provided with a control part (2214). 23) The inner shell (212) is also provided with an abutment limiting part (2124). When the control part (2223) is subjected to external force, the control member (222) rotates against the elastic pre-tightening force provided by the elastic element (230) until it is disengaged from the abutment state of the first abutment part (2212). At this time, the abutment limiting part (2124) abuts against the third abutment part (2214), and the locking assembly (200) is in the released state. If the external force is removed at this time, the first abutment part (2212) and the second abutment part (2222) remain abutted in the released position (2212c) under the drive of the elastic pre-tightening force.

4. The door lock according to claim 3, characterized in that, The latch control assembly (300) includes a flexible traction member (310), a mounting base (320), and an operating element (330). The operating element (330) is movably connected to the mounting base (320), which is fixedly connected to the outside (12) of the door (10). The control unit (2223) has a connecting through hole (2223a). The flexible traction member (310) includes a control connection end (311) and a latch connection end (312). The fastening end (312) is connected to the control unit (2223) through the connecting through hole (2223a), and the control connection end (311) is connected to the operating element (330) through the mounting through hole (13). The operating element (330) pulls the flexible traction member (310) and the control unit (2223), thereby causing the control member (222) to rotate against the elastic preload provided by the elastic element (230) until it contacts the first contact part ( 2212) The latch assembly (200) is released from the engagement state and finally switched from the fastened state to the released state. During the process of the latch assembly (200) changing from the fastened state to the released state, the latch mating part (2123) and the latching part (2213) are decoupled. Under the action of the elastic preload provided by the elastic element (230), the fixing bolt (100) automatically pops out from between the latch mating part (2123) and the latching part (2213), and drives the latch to release. The door (10) rotates to disengage from the closed state; the operating element (330) is provided with a mounting hole (331) and a screw fastener (332), and after the control connection end (311) is inserted into the mounting hole (331), it is fixedly connected to the operating element (330) by the screw fastener (332); the operating element (330) includes a connecting member (333) and a gripping member (334), and the gripping member (334) and the connecting member (333) are connected by threads.

5. The door lock according to claim 4, characterized in that, The latch control assembly (300) further includes a preload spring (340). The mounting base (320) has a mounting channel (321). The preload spring (340) is sleeved on the connecting member (333) and passes through the mounting channel (321) with the connecting member (333) to be threadedly connected to the gripping member (334). The mounting base (320) has a third preload abutment (322). The third preload abutment (322) is located at the end of the mounting channel (321) away from the door (10), and the inner diameter of the third preload abutment (322) is smaller than the inner diameter of the mounting channel (321). The operating element (330) has a fourth preload abutment (335). The fourth pre-tightening abutment (335) is located at one end of the connecting member (333) near the door (10). The outer diameter of the fourth pre-tightening abutment (335) is smaller than the inner diameter of the installation channel (321), and the outer diameter of the fourth pre-tightening abutment (335) is larger than the inner diameter of the third pre-tightening abutment (322). The two ends of the pre-tightening spring (340) abut against the third pre-tightening abutment (322) and the fourth pre-tightening abutment (335) respectively. The connecting member (333) is provided with an auxiliary groove (3331). The auxiliary groove (3331) is used to prevent the connecting member (333) from rotating when it is threadedly connected to the gripping member (334).

6. The door lock according to claim 1, characterized in that, The fixing bolt (100) includes a bolt part (110), a gripping part (120), and a connecting part (130).

7. The door lock according to claim 2, characterized in that, The elastic element (230) is a torsion spring.

8. The door lock according to claim 3, characterized in that, The latch assembly (200) further includes a control button (240). The outer shell (211) is provided with a button mounting hole (2111b). The control button (240) passes through the button mounting hole (2111b) from the inner side (11) of the receiving space (213) and is movably connected to the outer shell (211). One end of the control button (240) in the receiving space (213) abuts against the control part (2223). The control button (240) is provided with a plurality of guide ribs (241). The outer shell (211) is provided with a plurality of guide grooves (2111a). The control button (240) and the outer shell (211) are slidably connected to the guide ribs (241) through the guide grooves (2111a).

9. The door lock according to claim 8, characterized in that, The control button (240) protrudes from the pressing part of the outer casing (211) and is hemispherical.

10. The door lock according to claim 8, characterized in that, The outer shell (211) is made of zinc alloy and is fixedly connected to the inner side (11) of the door (10) by threaded fasteners.

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