Automatic locking mechanical door lock
By designing an automatic locking mechanical door lock, the operation of the bolt and handle is simplified by using a connecting plate and spring mechanism, which solves the cumbersome problem of frequent opening and closing of traditional mechanical door locks and improves the ease of operation and structural stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI KAIXU TRANSMISSION TECH CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional mechanical door locks are cumbersome to operate and prone to damage when frequently opening and closing doors in vehicle cabs or equipment operating rooms, affecting maintenance efficiency.
The automatic locking mechanical door lock connects the handle and the bolt through a connecting plate and spring mechanism. The spring provides tension to fix the handle position, so that the bolt can remain open or closed without external force, simplifying operation.
It achieves stable switching of the latch, is easy to operate, adapts to the needs of frequent door opening and closing, reduces structural wear, and improves maintenance efficiency.
Smart Images
Figure CN224200384U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical door lock technology, and specifically refers to an automatic locking mechanical door lock. Background Technology
[0002] Door locks are common items in daily life and have a wide range of applications. Most mechanical door locks, to protect internal security and prevent easy opening, typically have complex internal designs and include automatic locking functions, locking automatically after closing. However, in special application scenarios such as the driver's cab of a rail maintenance vehicle or equipment operating room, where frequent opening and closing of doors is required, using traditional mechanical locks becomes cumbersome, prone to damage, and requires repeated opening and closing, impacting work efficiency. Utility Model Content
[0003] This utility model provides an automatic locking mechanical door lock, which mainly solves the problem that when maintaining a vehicle cab or equipment operating room, it is necessary to frequently open and close the door. Traditional mechanical door locks are very cumbersome in structure and are easily damaged, thus improving maintenance efficiency.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] An automatic locking mechanical door lock, comprising:
[0006] The base has an inner side and an outer side;
[0007] The locking tongue is rotatably located on the inner side of the base;
[0008] The handle is rotatably located on the inside of the base;
[0009] A connecting plate has a mounting cavity. One end of the connecting plate is movably connected to the latch and forms a first connection point. The other end of the connecting plate is movably connected to the handle and forms a second connection point. The handle can drive the latch to rotate around the base through the connecting plate.
[0010] A first spring has one end connected to the base and the other end connected to a second connection point. The first spring is always in a stretched state.
[0011] In some embodiments, when the latch is in the locked state, the second connection point is close to the hinge point between the latch and the base, and the angle between the length direction of the first spring and the base is an acute angle.
[0012] In some embodiments, the locking tongue is provided with a first fixing pin, the connecting plate is provided with a first slot, the first slot is provided with a preset length, and the first fixing pin can move along the length direction of the first slot.
[0013] In some embodiments, a second spring is also included, which is disposed in the mounting cavity of the connection. One end of the second spring abuts against the inner wall of the mounting cavity, and the other end of the second spring abuts against the first fixing pin. The second spring is always in a compressed state.
[0014] In some embodiments, the base is provided with a first window, and one end of the handle moves to the outside of the base through the first window.
[0015] In some embodiments, the base is provided with a first protrusion to form a first cavity, and when the latch is in the locked state, one end of the handle is located in the first cavity.
[0016] In some embodiments, the first protrusion has a first through hole, and the handle has an arc-shaped portion, the radius of which is the same as the distance between the first through hole and the rotation point of the handle.
[0017] In some embodiments, a rubber sleeve is provided at the first through hole, and a first channel is provided on the rubber sleeve, through which the handle is movably inserted.
[0018] In some implementations, when the latch is fully open, the handle rests against the first protrusion.
[0019] In some embodiments, the handle is provided with a grip, which abuts against the rubber sleeve when the latch is in the locked state.
[0020] Compared with the prior art, the beneficial effects of this utility model are:
[0021] This application connects the handle and the latch by setting a connecting plate. The rotation of the handle can drive the latch to rotate, realizing the opening and closing of the latch. By setting a first spring, the tension provided by the spring fixes the position of the handle relative to the base, thus realizing that the latch can reach the normally open or normally closed state without the action of external force. The structure is stable and simple, easy to operate, and facilitates the switching between the two states of the door being open or closed at any time. The operator can choose according to various state requirements.
[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description
[0023] Figure 1 This is a cross-sectional view of an automatic locking mechanical door lock according to the present invention;
[0024] Figure 2 This is a front view of an automatic locking mechanical door lock according to the present invention;
[0025] Figure 3 This is a side view of the latch of an automatic locking mechanical door lock of the present invention in the closed state; Detailed Implementation
[0026] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the embodiments, unless otherwise stated, the terms "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the present application must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.
[0027] like Figure 1 and Figure 2 As shown, this utility model provides an automatic locking mechanical door lock, mainly comprising a base 100, a bolt 300, a handle 200, and a connecting plate 400. Specifically, the base 100 has an inner side and an outer side, and the bolt 300 is rotatably disposed on the inner side of the base 100, as shown below. Figure 1As shown, the left side of the base 100 is the outer side, and the right side of the base 100 is the inner side. One end of the handle 200 is rotatably connected to the base 100, allowing the handle 200 to rotate relative to the base 100. In this embodiment, the latch 300 and the handle 200 are rotatably connected via a hole-shaft fit. A connecting plate 400 is provided between the handle 200 and the latch 300. One end of the connecting plate 400 is movably connected to the latch 200, forming a first connection point 301, and the other end of the connecting plate 400 is movably connected to the handle 200, forming a second connection point 302. When the handle 200 is rotated, the connecting plate 400 drives the latch 300 to rotate relative to the base 100, thereby adjusting the position of the latch 300 and enabling it to be fully opened and closed. In the closed state, the latch 300 protrudes and abuts against the outer door frame, preventing the door from opening. In the open state, the latch 300 retracts and does not abut against the outer door frame, allowing the door to be opened or closed freely. In this embodiment, both ends of the connecting plate 400 are provided with first fixing pins 303 to achieve a movable connection between the connecting plate 400 and the latch 300, as well as between the connecting plate 400 and the handle 200. It should be noted that to maintain the latch 300 in the open or closed state, a first spring 203 is provided between the base 100 and the handle 200. The tension released by the first spring 203 controls the position of the handle 200, thereby fixing the relative position of the latch 300. Specifically, one end of the first spring 203 is fixedly connected to the base 100, and the other end of the first spring 203 is connected to the second connection point 302 of the connecting plate 400 and the handle 200. In this embodiment, the second connection point 302 is the first fixing pin 303, so one end of the first spring 203 is fixed to the first fixing pin 303, and the first spring 203 is always in a stretched state, thereby providing tension. Figure 1 As shown, the handle 200 is placed against the base 100, and at this time the handle 200 cannot move away from the base. Figure 1 Rotate counterclockwise as shown to keep the latch 300 closed. When the operator rotates according to... Figure 1 When handle 200 is turned clockwise in the direction shown, handle 200 will reach the position indicated by... Figure 3 As shown in the image, the handle 200 drives the latch 300 into the open state, with part of the handle 200 resting against the base 100. Figure 3 As shown, at this time, handle 200 cannot be turned clockwise, the latch 300 is fully open, and the door can be opened and closed at will.
[0028] In this application, a connecting block 400 is set between the handle 200 and the latch 300 to achieve synchronous control of the latch 300 and the handle 200. At the same time, combined with the first spring 203, the latch 300 can be maintained in both open and closed states. The structure is simple, the control is convenient, and it meets the needs of repeated opening and closing of doors during engineering maintenance.
[0029] In one embodiment, when the latch 300 is in the locked state, the second connection point 302 is close to the hinge point between the latch 300 and the base 100, and the angle between the length direction of the first spring 203 and the base 100 is an acute angle. This ensures that the tension of the first spring 203 is within a certain range. Figure 1 The horizontal force shown has a horizontal component, which ensures that the handle 200 tends to move counterclockwise relative to the base 100, thereby ensuring the relative position of the connecting plate 400 and further ensuring the position of the locking tongue 300.
[0030] In one embodiment, to ensure that the locking bolt 300 can fully reach the locked state, the locking bolt 300 and the connecting plate 400 are connected via a hole and shaft. Specifically, a first fixing pin 303 is provided on the locking bolt 300, and a first slot is provided on the connecting plate 400. The width of the first slot matches the outer diameter of the first fixing pin 303, and the first slot has a preset length so that the first fixing pin 303 can move relative to the length direction of the first slot, thereby ensuring that there is no movement interference between the locking bolt 300 and the connecting plate 400 during rotation. Based on this structure, the locking bolt 300 can rotate and move relative to the connecting plate 400 through the first fixing pin 303.
[0031] Furthermore, to ensure that the locking tongue 300 reaches a fully locked state, a mounting cavity is provided inside the connecting plate 400, and a second spring 401 is provided inside the mounting cavity. One end of the second spring 401 abuts against the inner wall of the mounting cavity, and the other end of the second spring 401 abuts against the first fixing pin 303. The second spring 401 is always in a compressed state, thereby ensuring that the position of the locking tongue 300 relative to the connecting plate 400 is always as described above. Figure 1 The uppermost position in the indicated direction ensures that the locking tongue 300 is fully locked.
[0032] In one embodiment, a first window is provided on the base 100, and one end of the handle 200 can be located outside the base 100 through the first window. The operator can then position the handle 200 as follows: Figure 3 Rotating clockwise as shown in the diagram allows the latch 300 to move from the locked state to the open state, enabling the door to be opened from the outside. In this embodiment, a grip 202 is provided on the handle 200 to facilitate its movement.
[0033] In one embodiment, a first protrusion 101 is provided on the base 100 to form a first cavity 102, and the first window communicates with the first cavity 102. When the latch 300 is in the locked state, one end of the handle 200 is located in the first cavity 102, that is, the grip 202 is located in the first cavity 102. At this time, the handle 200 will not protrude relative to the base 100.
[0034] Furthermore, a first through hole is provided on the first protrusion 101, and an arc-shaped portion 201 is provided on the handle 200, wherein the radius of the arc-shaped portion 201 is the same as the distance between the first through hole and the rotation point of the handle 200. In this embodiment, the main body of the handle 200 is a cylindrical structure. By adopting the above structure, the size of the first through hole can be effectively reduced. In this embodiment, the first through hole is slightly larger than the diameter of the handle 200, and the arc length of the arc-shaped portion 201 can meet the requirement that the latch 300 changes from the locked state to the open state.
[0035] Furthermore, to meet the sealing requirements inside and outside the base 100, a rubber sleeve 103 is provided at the first through hole. A first channel is provided on the rubber sleeve 103. One end of the handle 200 passes through the first channel, and the handle 200 can move relative to the rubber sleeve 103. During the movement, the friction loss between the handle 200 and the base 100 is reduced, and the sealing performance is improved, thereby meeting the application requirements of this structure for different application scenarios.
[0036] In one embodiment, when the latch 300 is fully open, a portion of the handle 200 abuts against the base 100, thereby preventing the handle 200 from over-rotating. Simultaneously, when the latch 300 is in the locked state, the grip 202 is engaged with the rubber sleeve 103, ensuring that the handle 200 does not continue to move forward. Figure 1 The counterclockwise movement shown ensures the stability of the locking tongue 300 in the locked state.
[0037] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model. These improvements and modifications should also be considered within the scope of protection of this utility model.
Claims
1. An automatic locking mechanical door lock, characterized in that, include: The base has an inner side and an outer side; The locking tongue is rotatably located on the inner side of the base; The handle is rotatably located on the inside of the base; A connecting plate has a mounting cavity. One end of the connecting plate is movably connected to the latch and forms a first connection point. The other end of the connecting plate is movably connected to the handle and forms a second connection point. The handle can drive the latch to rotate around the base through the connecting plate. A first spring has one end connected to the base and the other end connected to a second connection point. The first spring is always in a stretched state.
2. The automatic locking mechanical door lock according to claim 1, characterized in that, When the latch is in the locked state, the second connection point is close to the hinge point between the latch and the base, and the angle between the length direction of the first spring and the base is an acute angle.
3. The automatic locking mechanical door lock according to claim 1, characterized in that, The locking tongue is provided with a first fixing pin, and the connecting plate is provided with a first slot with a preset length. The first fixing pin can move along the length direction of the first slot.
4. The automatic locking mechanical door lock according to claim 3, characterized in that, It also includes a second spring, which is disposed in the mounting cavity of the connection. One end of the second spring abuts against the inner wall of the mounting cavity, and the other end of the second spring abuts against the first fixing pin. The second spring is always in a compressed state.
5. The automatic locking mechanical door lock according to claim 1, characterized in that, The base is provided with a first window, and one end of the handle moves to the outside of the base through the first window.
6. The automatic locking mechanical door lock according to claim 1, characterized in that, The base has a first protrusion to form a first cavity. When the latch is in the locked state, one end of the handle is located in the first cavity.
7. The automatic locking mechanical door lock according to claim 6, characterized in that, The first protrusion has a first through hole, and the handle has an arc-shaped part, the radius of which is the same as the distance between the first through hole and the rotation point of the handle.
8. The automatic locking mechanical door lock according to claim 7, characterized in that, A rubber sleeve is provided at the first through hole, and a first channel is provided on the rubber sleeve. The handle is movably inserted through the first channel of the rubber sleeve.
9. The automatic locking mechanical door lock according to claim 6, characterized in that, When the latch is fully open, the handle rests against the first protrusion.
10. An automatic locking mechanical door lock according to claim 8, characterized in that, The handle is equipped with a grip, and when the locking tongue is in the locked state, the grip and the rubber sleeve abut against each other.