A door lock to prevent cabinet door from being left open
Patent Information
- Application Number
- CN202522420862.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-14
AI Technical Summary
[0002]工业柜内装有各种电器元件并通过在柜门上设置门锁使得柜门能相对柜体启闭，现有的门锁包括有能与柜门固定连接的壳体、旋转连接于壳体一端的转轴、位于壳体外且与转轴一端固定连接锁片、与转轴位于壳体内一端联动且能相对转轴弹性转动的手柄、定位于壳体另一端处的锁具和能与锁具联动且能与手柄一端卡接的锁舌，工人在打开锁具或打开柜门的过程中，均可以将钥匙拔出，在作业结束时也无需插入钥匙即可将柜门关闭，此时容易造成柜门已关闭的假象，造成工人忘记插入钥匙锁闭锁具的风险；抑或者在多人合作的工作场景中，无法确认其中是否有人已经关闭了锁具，柜门能在外力（如盗窃者、非工作人员、无保护意识的儿童等）的驱动下相对柜体打开，造成电子元件被盗窃、工业柜被外人误操、存在触电风险以及外界杂质、雨水、飞禽或昆虫进入柜体而影响电器元件正常使用的结果
[0007]本实用新型的有益效果：通过限位块与限位槽插接使得钥匙无法驱动锁舌相对壳体转动，如此设计相比现有技术能够在柜门与柜体关闭到位后，手柄才能与锁舌插接而定位于壳体内，防止柜门漏关的现象发生。
Smart Images
Figure CN224919003U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cabinet door lock technology, and more specifically to a door lock that prevents cabinet doors from being left open. Background Technology
[0002] The industrial cabinet contains various electrical components and a door lock allows the door to open and close relative to the cabinet body. Existing door locks include a housing fixedly connected to the cabinet door, a pivot rotatably connected to one end of the housing, a lock plate located outside the housing and fixedly connected to one end of the pivot, a handle located inside the housing and elastically rotating relative to the pivot, a lock mechanism positioned at the other end of the housing, and a latch that engages with the lock mechanism and locks into one end of the handle. Workers can remove the key while opening the lock mechanism or the cabinet door, and also when finishing work. If the cabinet door can be closed without inserting a key, it can create the illusion that the door is closed, leading to the risk that workers may forget to insert the key to lock the cabinet. Alternatively, in a collaborative work environment, it may be impossible to confirm whether someone has already locked the door, and the cabinet door may be opened relative to the cabinet by external force (such as thieves, unauthorized personnel, or children without awareness of safety), resulting in the theft of electronic components, accidental operation of the industrial cabinet by outsiders, the risk of electric shock, and the entry of external impurities, rainwater, birds, or insects into the cabinet, affecting the normal operation of electrical components. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a door lock that can ensure that the cabinet door and the cabinet body are completely closed and prevent them from being left open.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a door lock for preventing cabinet doors from being left open, comprising a housing, a handle that can rotate relative to the housing, a lock located at one end of the housing, and a bolt that can be inserted into the handle and is linked with the lock. The housing contains a push rod located on one side of the bolt and a spring sleeved on one end of the push rod. One end of the push rod extends out of the housing and can move linearly relative to the housing. Limiting blocks are provided on both sides of the push rod within the housing. The bolt is provided with a limiting groove for inserting a limiting block. The spring is limited between the lock and the limiting block. The insertion of the limiting block into the limiting groove prevents the key from driving the bolt to rotate relative to the housing.
[0005] As a further improvement of this utility model, the lock includes a lock body fixedly connected to the housing and through which the bolt passes, a lock cylinder that can rotate relative to the lock body and into which a key is inserted, and multiple lock cylinder paddles that are confined within the lock cylinder and actuated by the key. The lock cylinder is provided with a lock pin for driving the bolt to move linearly. The inner wall of the lock body is provided with two movable slots that are distributed circumferentially along the inner wall of the lock body and into which one end of the multiple lock cylinder paddles extends. One of the movable slots is provided with a limiting strip to prevent the multiple lock cylinder paddles from moving relative to the lock cylinder. The spring is confined between the lock body and the limiting block. By having the multiple lock cylinder paddles all contact the limiting strip and thus unable to move relative to the lock cylinder, the key cannot be pulled out of the lock cylinder.
[0006] As a further improvement of this utility model, two travel blocks are provided on the inner wall of the lock body near the lock body port, and a protrusion is provided on the outer wall of the lock cylinder that can contact the travel blocks. The lock cylinder rotates relative to the lock body into position by the protrusion contacting the travel blocks.
[0007] The beneficial effects of this utility model are as follows: by connecting the limiting block and the limiting groove, the key cannot drive the lock tongue to rotate relative to the housing. Compared with the prior art, this design allows the handle to be connected to the lock tongue and positioned inside the housing only after the cabinet door and cabinet body are closed, thus preventing the cabinet door from being left open. Attached Figure Description
[0008] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a three-dimensional sectional view of the present invention in a locked state; Figure 3 for Figure 2 3D sectional view in the unlocked state Figure 4 This is an exploded view of the present invention after the handle has been removed; Figure 5 for Figure 4 A state diagram from another perspective.
[0009] Reference numerals in the attached drawings: 1. Housing; 2. Handle; 3. Lock; 31. Lock body; 32. Lock cylinder; 33. Lock cylinder lever; 34. Lock pin; 35. Movable groove; 36. Limiting bar; 37. Travel block; 38. Protrusion; 4. Lock tongue; 5. Push rod; 6. Spring; 7. Limiting block; 8. Limiting groove. Detailed Implementation
[0010] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.
[0011] Reference Figures 1 to 5As shown, a door lock for preventing cabinet doors from being left open according to this embodiment includes a housing 1, a handle 2 that can rotate relative to the housing 1, a lock 3 located at one end of the housing 1, and a bolt 4 that can be inserted into the handle 2 and linked with the lock 3. The lock 3 includes a lock body 31 that is fixedly connected to the housing 1 and through which the bolt 4 passes, a lock cylinder 32 that can rotate relative to the lock body 31 and through which a key is inserted, and multiple lock cylinder paddles 33 that are limited within the lock cylinder 32 and through which the key pushes. The lock cylinder 32 is provided with a lock pin 34 for driving the bolt 4 to move linearly. The inner wall of the lock body 31 is provided with two movable grooves 35 that are distributed circumferentially along the inner wall of the lock body 1 and through which one end of the multiple lock cylinder paddles 33 extends. Based on the aforementioned prior art, a through hole is made in the housing 1 for the push rod 5 to pass through, and a limiting groove 8 is cut on one side of the latch 4 for the limiting block 7 to be accommodated. A limiting block 7 is integrally formed on both sides of the push rod 5. The distances from the two ends of the push rod 5 to the limiting blocks 7 are different, and they are the long end and the short end, respectively. During assembly, the spring 6 is sleeved on the short end of the push rod 5 and contacts the two limiting blocks 7. Then, the long end of the push rod 5 is inserted into the housing 1 first and passes through the through hole. After the short end of the push rod 5 and the spring 6 have entered the inner cavity of the housing 1, the key is inserted into the lock 3 and drives the lock cylinder 32 to rotate relative to the lock body 31, causing the latch 4 to move a certain distance into the lock body 31. When the key is inserted into the lock cylinder 32, the lock cylinder lever 33 will move radially relative to the lock cylinder 32 under the action of the key's teeth, and one end of the lock cylinder lever 33 will extend into the corresponding movable groove 35. As the key is inserted into the position, the lock cylinder lever 33 will retract towards the lock cylinder 32 under the action of gravity. 2. Then, the key, lock cylinder 32 and lock cylinder paddle 33 are rotated relative to the lock body 31 into position. At this time, the key is in a horizontal position. Pull the key out of the lock cylinder 32. The lock cylinder paddle 33 will move radially relative to the lock cylinder 32 under the action of the key's tooth shape and one end of the lock cylinder paddle 33 will extend into another movable groove 35. The lock 3 is installed into the housing 1. At this time, the limiting groove 8 on the lock tongue 4 and the limiting block 7 on the top rod 5 are at the same height. As the lock 3 enters the housing 1, the surface of the lock body 31 facing the inner cavity of the housing 1 will touch one end of the spring 6 and push the spring 6 and the top rod 5 to move as a whole. If the limiting block 7 touches the housing 1, the spring 6 will be compressed and deformed until the lock body 31 moves into position and is fixedly connected to the housing 1. The limiting groove 8 and the limiting block 7 are inserted together. Finally, the handle 2 is installed on the housing 1 and the housing 1 is fixedly installed on the cabinet door. A baffle that can touch the top rod 5 can be set at the edge of the port where the cabinet body and the cabinet door meet. In the initial state, the cabinet door is open relative to the cabinet body, the handle 2 is outside the housing 1 and in a horizontal position, the limiting block 7 is in contact with the housing 1 under the action of the spring 6, the push rod 5 extends out of the housing 1 to its maximum length, the limiting block 7 is inserted into the limiting groove 8, the length direction of the key hole of the lock cylinder 32 is parallel to the horizontal plane, the handle 2 swings out of the housing 1 under the action of the torsion spring, the length direction of multiple lock cylinder paddles 33 is parallel to the horizontal plane and the ends extend into one of the movable grooves 35. During the closing process, the cabinet door is rotated to the position where it is completely closed with the cabinet body, and the push rod... 5. The key contacts the top of the baffle and retracts into the housing 1 under the push of the baffle. Spring 6 is compressed, and limit block 7 exits the limit groove 8. Then, the key is inserted into the lock cylinder 32 in a horizontal position. Immediately afterwards, an external force is applied to the handle 2, causing the handle 2 to rotate from a horizontal position to a vertical position and swing into the housing 1. The key drives the lock cylinder 32 to rotate relative to the lock body 31, causing the key to change from a horizontal position to a vertical position. Multiple lock cylinder paddles 33 return to the lock cylinder 32 under the action of gravity, and the inner walls of multiple lock cylinder paddles 33 contact the top of the key. The lock cylinder 32 drives the lock cylinder through the lock pin 34. Tongue 4 moves upward and one end of the locking tongue 4 engages with handle 2. At this point, the external force applied to handle 2 is removed, and handle 2 can no longer swing out of housing 1 under the action of the torsion spring. The limiting groove 8 and the limiting block 7 are at different heights, and the cabinet door and cabinet body are locked. Finally, the key is pulled out of the lock cylinder 32. During the opening process, the key is inserted into the lock cylinder 32 and drives the lock cylinder 32 to rotate. The locking tongue 4 moves downward and partially retracts into the lock body 31. When the key is horizontal, the limiting groove 8 and the limiting block 7 are at the same height again, the locking tongue 4 separates from handle 2, and handle 2 is in the torsion spring. When the handle 2 swings out of the housing 1, it applies external force to the handle 2, causing the handle 2 to swing from a vertical state to a horizontal state. Then, the cabinet door can be opened by rotating it relative to the cabinet body through the handle 2. As the cabinet door opens, the spring 6 gradually recovers its deformation and pushes the top rod 5 out of the housing 1 until the top rod 5 separates from the baffle. The limit block 7 is re-inserted into the limit groove 8. At this time, the key cannot drive the lock cylinder 32 to rotate relative to the lock body 31. When the handle 2 rotates back to the vertical state and swings into the housing 1, the lock tongue 4 cannot be inserted into the handle 2, so that the handle 2 cannot be fixed in the housing 1. Compared with existing technologies, this design allows the handle 2 to engage with the latch 4 and be positioned inside the housing 1 only after the cabinet door and cabinet body are closed, thus preventing the cabinet door from being left open.
[0012] As one specific implementation of the improvement, there is a possibility that a careless user, after closing the door, pulls the key horizontally out of the lock cylinder 32, causing the handle 2 to be pressed against the housing 1 and then released, causing the housing 1 to pop out. If a worker leaves without noticing, the handle 2 can rotate relative to the housing 1 to open the cabinet door, and the cabinet door and cabinet body cannot be effectively locked. To solve the aforementioned problem, refer to... Figure 3 and Figure 4As shown, a limiting strip 36 is machined in the movable groove 35 corresponding to the lock cylinder paddle 33 when it is in a horizontal state. The surface of the limiting strip 36 facing the lock cylinder 32 is on the same circumferential surface as the inner wall of the lock body 31. The straight line of the multiple lock cylinder paddles 33 is parallel to the length direction of the limiting strip 36. During use, after the key is inserted vertically into the lock cylinder 32, the multiple lock cylinder paddles 33 move up and down in the vertical direction and eventually contact the teeth of the key. The ends of the multiple lock cylinder paddles 33 facing the lock body 31 are flush with the outer wall of the lock cylinder 32. Then the key drives the lock cylinder 32 to rotate 90 degrees, and the key is in a horizontal position. In the horizontal position, the ends of multiple lock cylinder paddles 33 are all aligned with the limiting strip 36. If an outward pulling force is applied to the key, the multiple lock cylinder paddles 33 will move slightly radially along the lock cylinder 32. The ends of the multiple lock cylinder paddles 33 will contact the limiting strip 36 and will not be able to move. The multiple lock cylinder paddles 33 will still be engaged with the key's teeth. The key cannot be pulled out of the lock cylinder 32 under external force. Only by turning the key back to the vertical position can the key be pulled out of the lock cylinder 32. Compared with the existing technology, this design allows the user to ensure that the handle 2 and the bolt 4 are properly engaged before pulling out the key, preventing the cabinet door from being unlocked.
[0013] As one specific implementation method of the improvement, refer to Figure 4 and Figure 5 As shown, two travel blocks 37 are machined on the inner wall of the lock body 31 near the port of the lock body 31. The two travel blocks 37 are located on the same circumference. A protrusion 38 is integrally formed on the outer wall of the lock cylinder 32. The protrusion 38 can be determined according to the angle between the two travel blocks 37. If the angle between the two travel blocks 37 minus the angle opposite to the protrusion 38 is equal to 90 degrees, then the number of protrusions 38 is one and the protrusion 38 is located between the two travel blocks 37. When the lock cylinder 32 rotates 90 degrees forward or backward relative to the lock body 31, the protrusion 38 can move with the lock body 31. One travel block 37 is in contact with the top; if the angle between the two travel blocks 37 minus the angle opposite to the protrusion 38 is much greater than 90 degrees, then the number of protrusions 38 is two and the angle between the two protrusions 38 is 90 degrees. Both protrusions 38 are located between the two travel blocks 37. When the lock cylinder 32 rotates 90 degrees forward or backward relative to the lock body 31, the two protrusions 38 are in contact with and separate from the adjacent travel block 37 respectively. This can be determined according to actual production needs. This design can improve the accuracy of the rotation angle of the lock cylinder 32 relative to the lock body 31.
[0014] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A door lock for preventing a cabinet door from being left open, comprising a housing (1), a handle (2) rotatable relative to the housing (1), a lock (3) positioned at one end of the housing (1), and a bolt (4) capable of engaging with the handle (2) and linked with the lock (3), characterized in that: The housing (1) is provided with a push rod (5) located on one side of the latch (4) and a spring (6) sleeved on one end of the push rod (5). One end of the push rod (5) passes through the housing (1) and can move linearly relative to the housing (1). Limiting blocks (7) are provided on both sides of the push rod (5) located in the housing (1). The latch (4) is provided with a limiting groove (8) for a limiting block (7) to be inserted. The spring (6) is limited between the lock (3) and the limiting block (7). By inserting the limiting block (7) into the limiting groove (8), the key cannot drive the latch (4) to rotate relative to the housing (1).
2. A door lock for preventing cabinet doors from being left open according to claim 1, characterized in that: The lock (3) includes a lock body (31) fixedly connected to the housing (1) and through which the bolt (4) passes, a lock cylinder (32) that can rotate relative to the lock body (31) and into which a key is inserted, and a plurality of lock cylinder paddles (33) that are limited within the lock cylinder (32) and into which the key is actuated. The lock cylinder (32) is provided with a lock pin (34) for driving the bolt (4) to move linearly. The inner wall of the lock body (31) is provided with two movable grooves (35) that are distributed circumferentially along the inner wall of the lock body and into which one end of the plurality of lock cylinder paddles (33) extends. One of the movable grooves (35) is provided with a limiting strip (36) to prevent the plurality of lock cylinder paddles (33) from moving relative to the lock cylinder (32). The spring (6) is limited between the lock body (31) and the limiting block (7). The key cannot be pulled out of the lock cylinder (32) because the plurality of lock cylinder paddles (33) are all in contact with the limiting strip (36) and cannot move relative to the lock cylinder (32).
3. A door lock for preventing cabinet doors from being left open according to claim 2, characterized in that: The inner wall of the lock body (31) is provided with two travel blocks (37) near the port of the lock body (31), and the outer wall of the lock cylinder (32) is provided with a protrusion (38) that can contact the travel blocks (37). The lock cylinder (32) rotates relative to the lock body (31) into position by the protrusion (38) contacting the travel blocks (37).