A combination lockable and self-locking trolley lock

Abstract

The utility model discloses a kind of trolley lock with password and can self-lock, its technical solution main point is including connecting frame, lock shaft and draw bar, further including password component positioned on connecting frame and located directly above draw bar, unlocking component capable of being restricted by password component and shell for accommodating password component;Unlocking component includes two ends are located outside shell and are restricted by password component push rod, is located on the outer wall of shell and can be linked with the lifting rod of one end of push rod, one with the reset spring of lifting rod top touch, one is lifted by the linkage piece of one end of lifting rod, one end is fixedly connected with linkage piece and presents frame-shaped linkage frame, buckle foot positioned at the other end of linkage frame and one limit between connecting frame and buckle foot buckling spring, the end of draw bar away from lock shaft is provided with the buckling plate for the buckling of buckle foot, push rod is provided with the upper inclined surface of password component top touch;Solved the problem of low maintenance efficiency and low safety in prior art.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and more specifically to a lever lock with a password and self-locking capability. Background Technology

[0002] Industrial cabinets contain various electrical components and are opened and closed relative to the cabinet body via locks on their doors. Most industrial cabinets use traditional mechanical locks, requiring operators to insert a key into the lock cylinder to open or close the door. However, this method has several drawbacks. First, industrial cabinets are used in large numbers within factories or enterprises, and the lock cylinder sizes for each cabinet vary. It's easy to see operators carrying large bunches of keys or having multiple keychains hanging on the workroom walls, making it inconvenient to carry. Furthermore, the similarity in key appearance can affect the correct selection, reducing the operator's efficiency in operating or maintaining the corresponding industrial cabinet. Second, if all industrial cabinet locks are standardized, the limited number of keys increases the risk of lost keys being easily copied, increasing the possibility of theft. Additionally, operators may accidentally open other industrial cabinets, disrupting their normal operation. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lever lock that is easy to open and close cabinet doors, has high security and prevents accidental operation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a lever lock with a combination lock and self-locking capability, comprising a connecting frame that can be positioned on a cabinet door, a lock shaft that passes through and is rotatably connected to the connecting frame, and a lever that is hinged to one end of the lock shaft and can drive the lock shaft to rotate; further comprising a combination lock component positioned on the connecting frame and located directly above the lever, an unlocking component that can be restricted by the combination lock component, and a housing for accommodating the combination lock component; The unlocking assembly includes a push rod with both ends located outside the housing and restricted by the password assembly, a lifting rod located on the outer wall of the housing and capable of linkage with one end of the push rod, a return spring that contacts the lifting rod, a linkage plate supported by one end of the lifting rod, a linkage frame fixedly connected to the linkage plate at one end and in the shape of a frame, a latch located at the other end of the linkage frame, and a latching spring limited between the linkage frame and the latch. The end of the pull rod away from the lock shaft is provided with a latch plate for the latch to latch onto, and the push rod is provided with an upper inclined surface that contacts the password assembly. After the password component releases the restriction on the push rod, pushing one end of the push rod into the housing causes the other end of the push rod to move out of the housing and drive the lifting rod to move linearly. The lifting rod drives the linkage plate, linkage frame and buckle foot to move linearly as a whole, causing the buckle foot to disengage from the buckle plate.

[0005] As a further improvement of this utility model, the password component includes an inner shaft located inside the housing, a plurality of bushings sleeved outside the inner shaft and distributed along the length direction of the inner shaft, a plurality of digital disks respectively fixedly sleeved outside the plurality of bushings and partially protruding outside the housing, a pressure plate positioned at one end of the inner shaft and in contact with the upper inclined surface, and a digital spring sleeved outside the inner shaft and limited between the pressure plate and the bushings. The digital disk drives the bushings to rotate into position, so that the push rod is subjected to force and moves, while the inner shaft and the pressure plate move linearly relative to the bushings.

[0006] As a further improvement of this utility model, the pressure plate is provided with a pressure slope that can fit against the upper slope and slide relative to it.

[0007] As a further improvement of this utility model, the password component also includes a limiting member with a U-shaped cross section for the push rod to pass through, and the limiting member and the push rod are respectively provided with a limiting surface and a lower inclined surface that can fit together.

[0008] As a further improvement of this utility model, the linkage plate is arc-shaped and convex towards the lifting rod.

[0009] As a further improvement of this utility model, a protective cover is provided on the outside of the housing, which covers the push rod and can be opened relative to the housing.

[0010] As a further improvement of this utility model, a push-out spring is provided between the locking shaft and the pull rod.

[0011] As a further improvement of this utility model, the buckle foot is provided with a sliding slope that can slide relative to the buckle plate.

[0012] The beneficial effects of this utility model are as follows: By removing the restriction of the unlocking component on the password component, the unlocking component can release the lock between the pull rod and the connecting frame, thereby enabling the pull rod to rotate relative to the connecting frame. Compared with the existing technology that uses a password component to replace the traditional lock cylinder structure and uses an easy-to-operate unlocking component to control the opening and closing of the cabinet door, this design is more convenient to operate. It also eliminates the need for key production, storage, and carrying, simplifies the operator's operation steps for the industrial cabinet, improves operational efficiency, and reduces enterprise costs. The password component design allows different industrial cabinets to be controlled separately by changing different passwords, thereby preventing accidental operation of the industrial cabinet and improving the security of the industrial cabinet. By controlling the movement of the pull rod relative to the connecting frame through the linkage of the unlocking component, the shortcomings of the existing technology, such as the small space at the locking end, which cannot effectively accommodate the unlocking structure, can be effectively overcome. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a perspective view of the present invention when the protective cover and the housing are separated. Figure 3This is a three-dimensional sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of point B in the middle; Figure 6 This is a perspective view of the password component and the unlocking component in this utility model when they are linked.

[0014] Reference numerals: 1. Connecting frame; 2. Locking shaft; 3. Pull rod; 31. Buckle plate; 4. Password assembly; 41. Inner shaft; 42. Bushing; 43. Digital disc; 44. Pressure plate; 45. Digital spring; 46. Pressure slope; 47. Limiting component; 48. Limiting surface; 5. Unlocking assembly; 50. Sliding slope; 51. Push rod; 52. Lifting rod; 53. Return spring; 54. Linkage plate; 55. Linkage frame; 56. Buckle foot; 57. Buckling spring; 58. Upper slope; 59. Lower slope; 6. Housing; 7. Protective cover; 8. Ejection spring. Detailed Implementation

[0015] 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.

[0016] Reference Figures 1 to 6 As shown, a lever lock with a password and self-locking capability in this embodiment includes a connecting frame 1 that can be positioned on a cabinet door, a locking shaft 2 that passes through and is rotatably connected to the connecting frame 1, and a lever 3 that is hinged to one end of the locking shaft 2 and can drive the locking shaft 2 to rotate. Based on the aforementioned prior art, it also includes a password component 4 positioned on the connecting frame 1 and located directly above the pull rod 3, an unlocking component 5 that can be restricted by the password component 4, and a housing 6 for accommodating the password component 4. The housing 6 includes a front cover integrally formed with the connecting frame 1, a rear cover that can be assembled with the front cover, and an auxiliary cover connected to the rear cover. The password component 4 includes an inner shaft 41, multiple bushings 42, a number of digital disks 43 equal to the number of bushings 42, a pressure plate 44, and a digital spring 45. The pressure plate 44 is welded to one end of the inner shaft 41. The outer wall of the inner shaft 41 is integrally formed with protrusions equal to the number of bushings 42 and distributed along the length of the inner shaft 41. The inner hole of the bushing 42 is a countersunk hole, and the inner wall of the small end is machined with a groove that matches the protrusion. During the assembly process, the digital spring 45 is sleeved on the outside of the inner shaft 41 and moved to a position that abuts against the pressure plate 44. The multiple digital disks 43 are sleeved with the multiple bushings 42 one by one. The digital disks 43 are positioned on the outside of the corresponding bushings 42 by snap-fit. Then, the multiple bushings 42 are sleeved on the outside of the inner shaft 41 in sequence, with the protrusions located inside the corresponding bushings 42. The multiple bushings 42 abut against each other, and one of the bushings 42 abuts against one end of the digital spring 45. Unlocking component 5 includes a push rod 51, a lifting rod 52, a return spring 53, a linkage plate 54, a linkage frame 55, a latch 56, and a locking spring 57. The upper surface of the push rod 51 is cut to form an upper inclined surface 58, and one end of the push rod 51 is beveled to form a linkage surface. The lifting rod 52 is nearly Z-shaped, and one end of the lifting rod 52 is beveled to form a force-bearing surface that fits against the linkage surface. The linkage frame 55 is a frame with an outer contour dimension smaller than that of the connecting frame 1. The linkage plate 54 is welded to one end of the linkage frame 55 and is positioned relative to the plane on which the linkage frame 55 is located. The vertical plane of the connecting frame 55 is perpendicular to the plane of the connecting frame 55. The buckle 56 is detachably connected to the other end of the linkage frame 55 by bolts. The vertical plane of the buckle 56 is perpendicular to the plane of the linkage frame 55. Lugs that can be connected to the buckling spring 57 and the return spring 53 are respectively machined on the connecting frame 1 and the rear cover. The front cover is machined with a rod hole for one end of the push rod 51 to pass through and a digital hole for multiple digital discs 43 to partially pass through. The rear cover is machined with a rod hole for the other end of the push rod 51 to pass through. The pull rod 3 is machined with a groove on the surface facing the connecting frame 1 and a buckle plate 31 is installed at the opening of the groove. The buckle plate 31 is located at the end of the pull rod 3 away from the locking shaft 2. During assembly, push rod 51 is moved into the inner cavity of the front cover, with one end of push rod 51 penetrating through the front cover. Then, the assembled password component 4 is moved into the inner cavity of the front cover. Multiple digital discs 43 are inserted into multiple digital holes. The pressure plate 44 contacts the upper inclined surface 58, and the end face of the bushing 42 away from the pressure plate 44 is in contact with the inner wall of the front cover. Next, the rear cover is placed on top of the front cover and fixed in place. The password component 4 and push rod 51 are both confined within the housing 6. The end of push rod 51 with a linkage surface protrudes through the rear cover. One end of the return spring 53 is attached to the inflection point of the lifting rod 52. Then, the lifting rod 52 is moved towards the rear cover until the lifting rod 52 has a force-bearing surface. Part of the back cover is in close contact with the force-bearing surface and the linkage surface. The other end of the return spring 53 touches the lug on the back cover. Then, the auxiliary cover is installed on the back cover so that the lifting rod 52 is limited between the auxiliary cover and the back cover. The part of the lifting rod 52 without a force-bearing surface is located on one side of the return spring 53. The linkage frame 55 with the buckle 56 and the snap spring 57 is moved to the connecting frame 1 so that the linkage plate 54 is lifted by the end of the lifting rod 52 without a force-bearing surface. The snap spring 57 is limited between the lug of the connecting frame 1 and the end of the linkage frame 55. Finally, other components of the prior art are installed on the connecting frame 1 so that the linkage frame 55 is limited inside the connecting frame 1. In the initial state, the protrusion on the outer wall of the inner shaft 41 is located in the large end of the corresponding bushing 42 and is misaligned with the groove on the inner wall of the bushing 42. The pressure plate 44 prevents the push rod 51 from moving towards the lifting rod 52. The length direction of the pull rod 3 is parallel to the length direction of the connecting frame 1, and the buckle 56 is engaged with the buckle plate 31. During the opening process, the part of the digital disc 43 exposed outside the housing 6 is manually moved so that multiple digital discs 43 rotate to the unlock position in sequence. The inner shaft 41 cannot rotate because the pressure plate 44 is pressed against the push rod 51. Multiple bushings 42 rotate relative to the inner shaft 41 along with the digital discs 43. Once the movement is complete, all the grooves rotate to the same straight line and correspond to the protrusions. Then, the end of the push rod 51 protruding from the front cover is pushed into the housing 6. The pressure plate 44 slides relative to the upper inclined surface 58, causing the inner shaft 41 to move linearly relative to the bushing 42. The protrusions move into their corresponding grooves, increasing the length of the end of the push rod 51 protruding from the rear cover. The linkage surface slides relative to the force-bearing surface, forcing the lifting rod 52 to move along the length of the rear cover. The return spring 53 is compressed, and the linkage plate 54, linkage frame 55, and latch 56 move as a whole under the push of the lifting rod 52. The locking spring 57 is... Compression separates the latch 56 from the latch plate 31. Then, using the other hand, pull the end of the pull rod 3 with the latch plate 31 away from the connecting frame 1, releasing the pushing force applied to the push rod 51. The locking spring 57 and the return spring 53 return to their initial states. The lifting rod 52, push rod 51, linkage plate 54, linkage frame 55, and latch 56 all return to their initial positions. Finally, swing the pull rod 3 to a horizontal position to release the lock between the cabinet door and the door frame, allowing the cabinet door to open and close freely. During the locking process, pushing the push rod 51 causes the lifting rod 52, linkage plate 54, and linkage frame to... 55 and buckle 56 move linearly as a whole, and the return spring 53 and the buckling spring 57 are both compressed and deformed. Then, the other hand turns the pull rod 3 back to the initial position. Finally, the push rod 51 is released, and the return spring 53 and the buckling spring 57 return to their initial state. Buckle 56 is re-engaged with buckle plate 31. Digital spring 45 returns to its initial state and drives inner shaft 41 to move linearly relative to bushing 42. The protrusion exits the corresponding groove. Then, multiple digital discs 43 are randomly moved to make the groove on the inner wall of bushing 42 misalign with the protrusion. The push rod 51 is unable to move towards lifting rod 52 due to external force. Compared to existing technologies, this design replaces the traditional lock cylinder structure with a password component 4 and uses an easy-to-operate unlocking component 5 to control the opening and closing of the cabinet door. This makes operation more convenient, eliminates the need for key production, storage, and carrying, simplifies the operator's steps for operating the industrial cabinet, improves operational efficiency, and reduces enterprise costs. The design of the password component 4 allows different industrial cabinets to be controlled separately by changing different passwords, thereby preventing accidental operation of the industrial cabinet and improving its security. The linkage of the unlocking component 5 controls the movement of the pull rod 3 relative to the connecting frame 1, which effectively overcomes the shortcomings of existing technologies where the locking end space is too small to effectively accommodate the unlocking structure.

[0017] As one specific implementation method of the improvement, refer to Figure 4 As shown, the pressure plate 44 is provided with a pressure slope 46 that can be attached to and slide relative to the upper slope 58. Compared with the design of the pressure plate 44 sliding relative to the upper slope 58 through its edge, the design of the pressure slope 46 sliding relative to the upper slope 58 can effectively reduce the wear rate between the pressure plate 44 and the push rod 51, extend the service life of the pressure plate 44 and the push rod 51, and indirectly improve the control accuracy of the pressure plate 44 in controlling the movement of the push rod 51.

[0018] As one specific implementation of the improvement, when the push rod 51 moves excessively towards the front cover under the push of the pressure plate 44, the force-bearing surface and the linkage surface separate. The lifting rod 52 moves excessively under the push of the return spring 53, causing the force-bearing surface and the linkage surface to misalign and fail to re-fit, resulting in the unlocking component 5 failing to engage. To solve the aforementioned problem, refer to... Figure 4 As shown, the password component 4 also includes a limiting member 47 with a U-shaped cross section for the push rod 51 to pass through. The limiting member 47 and the push rod 51 are respectively provided with a limiting surface 48 and a lower inclined surface 59 that can fit together. When the push rod 51 moves towards the front cover under the pressure plate 44, as the lower inclined surface 59 fits with the limiting surface 48, the pressure plate 44 cannot continue to push the push rod 51 under the action of the digital spring 45. This design limits the movement distance of the push rod 51 and ensures that the linkage surface and the force-bearing surface always remain in contact, so that the subsequent push rod 51 can drive the lifting rod 52 to move.

[0019] As one specific implementation method of the improvement, refer to Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the linkage plate 54 is arc-shaped and protrudes towards the lifting rod 52. This design improves the structural strength of the linkage plate 54 and the connection stability with the linkage frame 55 compared to making the linkage plate 54 flat.

[0020] As one specific implementation method of the improvement, refer to Figure 2 As shown, grooves extending along the length of housing 6 are machined on both sides of housing 6. Sliding strips that can move along the grooves are machined on the inner walls of the protective cover 7 facing each other. The protective cover 7 can be made of transparent plastic material. In the initial state, the protective cover 7 covers the push rod 51 and digital disk 43. When the cabinet door needs to be opened, the protective cover 7 is pushed in a straight line relative to housing 6. The protective cover 7 moves to one side of housing 6, and the end of push rod 51 and digital disk 43 are exposed and can bear force. After the operation is completed, the protective cover 7 is moved back to the initial position. This design can protect push rod 51 and digital disk 43, and prevent accidental contact by the operator or impact from falling objects, which may lead to misoperation or damage to parts.

[0021] As one specific implementation method of the improvement, refer to Figure 3As shown, a push-out spring 8 is provided between the locking shaft 2 and the pull rod 3. In the first embodiment, when the drive push rod 51 drives the buckle 56 to disengage from the buckle plate 31, the push-out spring 8 will immediately push the pull rod 3 to rotate relative to the locking shaft 2, and the buckle plate 31 will move away from the buckle 56. Then the operator can immediately release the push rod 51 after pressing it. At this time, even if the buckle 56 returns to its initial position, it will not hinder the movement of the pull rod 3. This design can simplify the door opening operation steps and improve the door opening efficiency.

[0022] As one specific implementation method of the improvement, refer to Figure 5 and Figure 6 As shown, the latch 56 is provided with a sliding ramp 50 that can slide relative to the latch plate 31. In the first embodiment, when it is necessary to restore the pull rod 3 to its initial state, there is no need to press the push rod 51 to drive the latch 56 to move. Instead, the pull rod 3 is directly pressed against the connecting frame 1. The edge of the latch plate 31 slides relative to the sliding ramp 50 and forces the latch 56, the linkage frame 55, and the linkage piece 54 to move as a whole. The locking spring 57 is compressed until the latch plate 31 disengages from the sliding ramp 50. The locking spring 57 restores its deformation and drives the latch 56, the linkage frame 55, and the linkage piece 54 to move in the opposite direction as a whole. The latch 56 then latches with the latch plate 31. This design simplifies the closing operation and improves the closing efficiency.

[0023] 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 combination lock with a combination lock and a self-locking mechanism, comprising a connecting frame (1) that can be positioned on a cabinet door, a locking shaft (2) that passes through and is rotatably connected to the connecting frame (1), and a pull rod (3) that is hinged to one end of the locking shaft (2) and can drive the locking shaft (2) to rotate, characterized in that: It also includes a password component (4) positioned on the connecting frame (1) and directly above the pull rod (3), an unlocking component (5) that can be restricted by the password component (4), and a housing (6) for accommodating the password component (4). The unlocking component (5) includes a push rod (51) with both ends located outside the housing (6) and restricted by the password component (4), a lifting rod (52) located on the outer wall of the housing (6) and capable of being linked with one end of the push rod (51), a return spring (53) that contacts the lifting rod (52), a linkage plate (54) supported by one end of the lifting rod (52), a linkage frame (55) fixedly connected to the linkage plate (54) and in the shape of a frame, a latch (56) positioned at the other end of the linkage frame (55), and a fastening spring (57) located between the connecting frame (1) and the latch (56). The pull rod (3) is provided with a latch plate (31) for the latch (56) to fasten at the end away from the lock shaft (2). The push rod (51) is provided with an upper inclined surface (58) that contacts the password component (4). After the password component (4) releases the restriction on the push rod (51), one end of the push rod (51) is pushed into the housing (6) so that the other end of the push rod (51) moves out of the housing (6) and drives the lifting rod (52) to move linearly. The lifting rod (52) drives the linkage plate (54), linkage frame (55) and buckle foot (56) to move linearly as a whole so that the buckle foot (56) disengages from the buckle plate (31).

2. A lever lock with a combination lock and self-locking capability according to claim 1, characterized in that: The password component (4) includes an inner shaft (41) located inside the housing (6), a plurality of bushings (42) sleeved outside the inner shaft (41) and distributed along the length of the inner shaft (41), a plurality of digital disks (43) respectively fixedly sleeved outside the plurality of bushings (42) and partially protruding outside the housing (6), a pressure plate (44) positioned at one end of the inner shaft (41) and touching the upper inclined surface (58), and a digital spring (45) sleeved outside the inner shaft (41) and limited between the pressure plate (44) and the bushings (42). The digital disk (43) drives the bushings (42) to rotate into place, so that the push rod (51) is subjected to force and moves, while the inner shaft (41) and the pressure plate (44) move linearly relative to the bushings (42).

3. A lever lock with a combination lock and self-locking capability according to claim 2, characterized in that: The pressure plate (44) is provided with a pressure slope (46) that can be attached to the upper slope (58) and slide relative to it.

4. A lever lock with a combination lock and self-locking capability according to claim 2 or 3, characterized in that: The password component (4) also includes a limiting member (47) with a U-shaped cross section for the push rod (51) to pass through. The limiting member (47) and the push rod (51) are respectively provided with a limiting surface (48) and a lower inclined surface (59) that can fit together.

5. A lever lock with a combination lock and self-locking capability according to claim 1, 2, or 3, characterized in that: The linkage plate (54) is arc-shaped and protrudes towards the lifting rod (52).

6. A lever lock with a combination lock and self-locking capability according to claim 1, 2, or 3, characterized in that: The housing (6) is provided with a protective cover (7) that covers the push rod (51) and can be opened relative to the housing (6).

7. A lever lock with a combination lock and self-locking capability according to claim 1, 2, or 3, characterized in that: An ejector spring (8) is provided between the locking shaft (2) and the pull rod (3).

8. A lever lock with a combination lock and self-locking capability according to claim 1, 2, or 3, characterized in that: The buckle (56) is provided with a sliding ramp (50) that can slide relative to the buckle plate (31).

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