Magnetic door lock
By introducing an adjustment mechanism into the magnetic door lock, the elastic potential energy of the torsion spring is dynamically adjusted, solving the problem of performance degradation caused by fatigue of the torsion spring, ensuring stable operation of the door lock and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU MEIYIDE DECORATE HARDWARE
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-26
AI Technical Summary
After long-term high-frequency use, the torsion springs of existing magnetic door locks experience a decline in elastic potential energy due to metal fatigue, resulting in problems such as insufficient resistance to the door handle's return and jamming of the lock tongue, which affect normal use.
A magnetic door lock was designed, which includes an adjustment mechanism. The preload of the torsion spring is adjusted by screws and bolts, and the elastic potential energy of the torsion spring is dynamically adjusted to ensure stable operating resistance of the door handle and smooth extension and retraction of the bolt.
By easily adjusting the preload of the torsion spring, the problem of performance degradation caused by torsion spring fatigue is solved, maintenance costs are reduced, and product reliability and service life are improved.
Smart Images
Figure CN224413362U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of magnetic door lock technology, specifically a magnetic door lock. Background Technology
[0002] Magnetic door locks are a modern door lock device with a simple, stylish and beautiful appearance. They can be adapted to various door types and are easy to install without complicated installation procedures, providing reliable security for homes and commercial spaces.
[0003] Existing magnetic door locks mainly consist of the following parts: permanent magnet, latch, lock body shell, and spring. The permanent magnet is the core component, providing continuous attraction force. When the door is closed, the strong magnetic force generated by the permanent magnet firmly attracts the bolt to the latch, keeping the door closed. When the door needs to be opened, external force is applied manually to overcome the magnetic force of the permanent magnet, causing the bolt to disengage from the latch, thereby opening the door.
[0004] Currently, existing magnetic door locks have the following drawbacks: After long-term high-frequency use, the torsion spring inside the lock body will inevitably experience elastic potential energy decay due to metal fatigue. Traditional magnetic door locks usually use a fixed installation structure for the torsion spring. When the performance of the torsion spring deteriorates, it will lead to insufficient resistance in the door handle's return and jamming of the latch extension and retraction, which will seriously affect the normal use of the door lock. To solve this problem, users often need to disassemble the door lock for repair. Therefore, a magnetic door lock is proposed to address the above problems. Utility Model Content
[0005] To address the shortcomings of existing magnetic door locks, a new type of magnetic door lock is proposed.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A magnetic door lock of this utility model includes a lock body consisting of a panel and a housing. A bolt is movably disposed within the housing, and a door handle that works in conjunction with the bolt to extend or retract the bolt into the housing. A locking plate is also movably disposed within the housing, and the up-and-down movement of the locking plate can lock or unlock the door handle. An operating handle for controlling the movement of the locking plate is also included. The lock also includes a lock box that magnetically engages with the bolt. An unlocking groove is provided on the bolt. A first positioning post and a second positioning post are provided within the housing. A torsion spring is sleeved on the first positioning post. The door handle has an abutment portion and a pushing portion that works in conjunction with the unlocking groove to retract the bolt into the housing. One end of the torsion spring abuts against the abutment portion so that the pushing portion does not affect the bolt extending out of the housing. The other end of the torsion spring abuts against the second positioning post, allowing the torsion spring to store elastic potential energy. An adjustment mechanism is provided within the housing for adjusting the position of the second positioning post to adjust the elastic potential energy of the torsion spring.
[0007] Preferably, the adjustment mechanism includes a screw rotatably disposed inside the housing, one end of the screw passing through the outside of the panel and having an adjustment screw, and a contact plate rotatably disposed at the thread of the screw for pushing the second positioning post to move, and also includes an arc-shaped slide groove formed on the housing, the second positioning post being slidably disposed in the arc-shaped slide groove.
[0008] Preferably, a limiting post is provided inside the box, and a limiting groove that cooperates with the limiting post is provided on the locking tongue.
[0009] Preferably, the door handle is provided with a limiting groove that cooperates with the limiting post to limit the rotation range of the door handle.
[0010] Preferably, the interlocking plate has a locking part and an unlocking part formed by the groove. The operating handle is provided with a control rod. The control rod abuts against the locking part and pushes the interlocking plate to move, so as to lock the door handle. At this time, the bolt cannot retract into the housing. The control rod abuts against the unlocking part and pushes the interlocking plate to move, so as to unlock the door handle. At this time, the bolt can extend and retract freely.
[0011] The beneficial effects of this utility model are:
[0012] This utility model provides a magnetic door lock that solves the performance degradation problem caused by torsion spring fatigue after long-term use of traditional magnetic door locks by setting an adjustment mechanism. The torsion spring preload can be adjusted independently through simple operation to ensure stable door handle turning resistance and smooth bolt extension and retraction, thereby reducing maintenance costs and improving product reliability. Attached Figure Description
[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0014] Figure 1 This is a structural diagram of the entire utility model;
[0015] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle;
[0016] Legend:
[0017] 1. Lock body; 101. Panel; 102. Lock box; 2. Lock tongue; 201. Unlocking groove; 202. Limiting groove; 3. Door handle; 301. Abutting part; 302. Pushing part; 303. Limiting groove; 4. Interlock plate; 401. Locking part; 402. Unlocking part; 5. Operating handle; 501. Control rod; 6. Lock box; 7. First positioning post; 8. Second positioning post; 9. Torsion spring; 11. Adjustment mechanism; 1101. Screw; 1102. Adjusting screw; 1103. Abutting plate; 1104. Arc-shaped slide groove; 12. Limiting post. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0019] Specific implementation examples are given below.
[0020] Please see Figures 1-2The present invention discloses a magnetic door lock, comprising a lock body 1 consisting of a panel 101 and a housing 102. A latch 2 is movably disposed within the housing 102, and a door handle 3 that cooperates with the latch 2 to extend or retract within the housing 102. A locking plate 4 is also movably disposed within the housing 102, and the up-and-down movement of the locking plate 4 can lock or unlock the door handle 3. An operating handle 5 is also provided to control the movement of the locking plate 4. The lock also includes a lock box 6 that magnetically engages with the latch 2. The locking plate 4 has a locking portion 401 and an unlocking portion formed by grooves. 402, The operating handle 5 is provided with a control lever 501. The control lever 501 abuts against the locking part 401 and pushes the interlocking plate 4 to move, so as to lock the door handle 3. At this time, the latch 2 cannot retract into the housing 102. The control lever 501 abuts against the unlocking part 402 and pushes the interlocking plate 4 to move, so as to unlock the door handle 3. At this time, the latch 2 can extend and retract freely. The latch 2 is provided with an unlocking groove 201. The housing 102 is provided with a limiting post 12. The latch 2 is provided with a limiting groove 202 that cooperates with the limiting post 12. The door handle 3 The door handle 3 is provided with a limiting groove 303 that cooperates with the limiting post 12 to limit the rotation range of the door handle 3. The housing 102 is provided with a first positioning post 7 and a second positioning post 8. A torsion spring 9 is sleeved on the first positioning post 7. The door handle 3 is provided with an abutment part 301 and a pushing part 302 that cooperates with the unlocking groove 201 to retract the latch 2 into the housing 102. One end of the torsion spring 9 abuts against the abutment part 301 so that the pushing part 302 does not affect the latch 2 from extending out of the housing 102. The other end of the torsion spring 9 abuts against the second positioning post 8 so that the torsion spring 9 stores a spring. The box 102 is provided with an adjustment mechanism 11 for adjusting the position of the second positioning post 8 to adjust the elastic potential energy of the torsion spring 9. The adjustment mechanism 11 includes a screw 1101 rotatably disposed in the box 102. One end of the screw 1101 passes through the outside of the panel 101 and is provided with an adjustment screw 1102. The thread of the screw 1101 is rotatably provided with an abutment plate 1103 for pushing the second positioning post 8 to move. It also includes an arc-shaped slide groove 1104 opened on the box 102, and the second positioning post 8 is slidably disposed in the arc-shaped slide groove 1104.
[0021] Working principle: The lock body 1 and lock box 6 are installed on the door body and door frame respectively. When the user turns the door handle 3 by the door handle, the pushing part 302 located on the inner side of the door handle 3 is inserted into the unlocking groove 201 on the surface of the latch 2, pushing the latch 2 to overcome the magnetic attraction between it and the lock box 6 and move linearly into the box 102 until the latch 2 is completely disengaged from the lock box 6, thus realizing the door opening action. During this process, the abutting part 301 of the door handle 3 simultaneously compresses the torsion spring 9 sleeved on the first positioning post 7, causing the torsion spring 9 to undergo elastic deformation and store elastic potential energy; the latch 2 in When the door is moved, the limiting groove 202 and the limiting post 12 cooperate to limit the movement trajectory range of the latch 2. The limiting post 12, in conjunction with the limiting groove 303, limits the rotation range of the door handle 3 to ensure operational accuracy. When the door handle is released, the door handle 3 releases its elastic potential energy via the torsion spring 9 and rotates back to reset, preventing the pushing part 302 from affecting the subsequent normal movement of the latch 2. When the door is closed, the permanent magnet at the front end of the latch 2 attracts the magnetic components inside the lock box 6, driving the latch 2 to automatically insert into the lock box 6. When it is necessary to lock the door to prevent it from being opened by the door handle 3, the operating handle 5 is rotated to control... When lever 501 abuts against the locking part 401, the interlocking plate 4 slides upward along the guide groove of the housing 102 under the push of the control lever 501 until the protrusion on one side is completely locked into the limiting notch of the door handle 3, forming a mechanical locking state. At this time, the door handle 3 cannot be rotated, and the latch 2 is fixed in the extended position. When the operating handle 5 is rotated in the opposite direction, the control lever 501 abuts against the unlocking part 402 and pushes the interlocking plate 4 downward, releasing the lock on the door handle 3. When the torsion spring 9 loses its elasticity due to long-term use, the user can use a tool to rotate the adjusting screw 1102, causing the screw 1101 to rotate around the bearing in a circular motion. The screw 1101's threaded surface and the threaded hole of the abutment plate 1103 form a helical transmission, driving the abutment plate 1103 to move linearly in the horizontal direction. The abutment plate 1103 pushes the second positioning pin 8 to slide in the arc-shaped slide groove 1104, gradually bringing it closer to the first positioning pin 7. This increases the compression of the torsion spring 9 and the preload, thereby restoring its elastic potential energy. This utility model achieves dynamic adjustment of the elastic potential energy of the torsion spring 9 through the designed adjustment mechanism 11, solving the problem of performance degradation caused by fatigue of the torsion spring 9 in traditional magnetic door locks, which affects the normal opening and closing of the door, and extending its service life.
[0022] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A magnetic door lock, comprising a lock body (1) consisting of a panel (101) and a housing (102), wherein a latch (2) is movably disposed within the housing (102), and a door handle (3) that cooperates with the latch (2) to extend or retract the latch (2) within the housing (102), a locking plate (4) is also movably disposed within the housing (102), wherein the locking plate (4) can lock or unlock the door handle (3) by moving up and down, and an operating handle (5) for controlling the movement of the locking plate (4), and further comprising a lock box (6) that magnetically engages with the latch (2), characterized in that: The latch (2) is provided with an unlocking groove (201). The housing (102) is provided with a first positioning post (7) and a second positioning post (8). A torsion spring (9) is sleeved on the first positioning post (7). The door handle (3) is provided with an abutment part (301) and a pushing part (302) that cooperates with the unlocking groove (201) to retract the latch (2) into the housing (102). One end of the torsion spring (9) abuts against the abutment part (301) so that the pushing part (302) does not affect the latch (2) from extending out of the housing (102). The other end of the torsion spring (9) abuts against the second positioning post (8) so that the torsion spring (9) stores elastic potential energy. The housing (102) is provided with an adjustment mechanism (11) for adjusting the position of the second positioning post (8) to adjust the elastic potential energy of the torsion spring (9).
2. A magnetic door lock according to claim 1, characterized in that: The adjustment mechanism (11) includes a screw (1101) rotatably disposed inside the housing (102), one end of the screw (1101) passing through the outside of the panel (101) and having an adjustment screw (1102) disposed thereon, and a contact plate (1103) rotatably disposed at the thread of the screw (1101) for pushing the second positioning post (8) to move, and also includes an arc-shaped slide groove (1104) opened on the housing (102), and the second positioning post (8) is slidably disposed in the arc-shaped slide groove (1104).
3. A magnetic door lock according to claim 1, characterized in that: The box body (102) is provided with a limiting post (12), and the locking tongue (2) is provided with a limiting groove (202) that cooperates with the limiting post (12).
4. A magnetic door lock according to claim 1, characterized in that: The door handle (3) is provided with a limiting groove (303) that cooperates with the limiting post (12) to limit the rotation range of the door handle (3).
5. A magnetic door lock according to claim 1, characterized in that: The interlocking plate (4) has a locking part (401) and an unlocking part (402) formed by the groove. The operating handle (5) is provided with a control rod (501). The control rod (501) abuts against the locking part (401) to push the interlocking plate (4) to move, so as to lock the door handle (3). At this time, the latch (2) cannot retract into the box (102). The control rod (501) abuts against the unlocking part (402) to push the interlocking plate (4) to move, so as to unlock the door handle (3). At this time, the latch (2) can extend and retract freely.