U-shaped combination lock

Abstract

This utility model provides a U-shaped combination lock, belonging to the field of lock technology. It solves the problem of inconvenient operation when changing the combination. It includes a lock body and a U-shaped lock beam. The lock body has a locking mechanism that locks the lock beam to the lock body. The locking mechanism includes a roller combination lock, which includes a wheel axle, a return spring sleeved on the wheel axle, a code-changing component sleeved on the wheel axle, and a number wheel sleeved outside the code-changing component. The lock body also has an operating component, which is cylindrical and perpendicular to the wheel axle. The operating component has a cylindrical support part, a circular block-shaped push part fixed to the outer end of the support part, and an operating head fixed to the outer end of the push part. The operating head protrudes from the lock body. The outer diameter of the push part is larger than that of the support part, and the push part is eccentrically positioned relative to the support part. The code-changing component is located on the outer periphery of the push part. The operating component can rotate around the center line of the support part. It has advantages such as improved operational convenience.

Description

Technical Field

[0001] This utility model belongs to the field of lock technology and relates to a U-shaped combination lock. Background Technology

[0002] U-locks are a very common type of lock, often used on glass doors, and come in both mechanical and combination lock versions. A combination lock, such as the U-shaped combination lock disclosed in Chinese Patent Application No. 202421905386.6, includes a long lock body and a U-shaped lock beam. The lock body has two parallel lock holes. The lock body also has a locking mechanism that locks the lock beam to the lock body when both ends of the lock beam are inserted into the two lock holes. The locking mechanism includes a roller combination lock, in which the outer wheel surface of the roller is exposed outside the lock body. The lock body has a pressing block and a supporting spring. The pressing block has a first end and a second end at two ends perpendicular to the wheel axle of the roller combination lock. The lock body has a guide post, and the pressing block has a guide hole that passes through its second end. The guide post is located in the guide hole. The supporting spring acts on the pressing block and makes its first end abut against the inner wall of the lock body. The outer side of the lock body has a through hole corresponding to the position where the first end of the pressing block abuts. The pressing block abuts against one end of the wheel axle. When the pressing block moves against the elastic force of the supporting spring, it can push the wheel axle to move. Under normal conditions, the first end of the pressure block rests against the inner wall of the lock body under the elastic force of the support spring. To change the combination of the roller combination lock, first rotate the roller in the roller combination lock to the correct position. Then, the user uses a small iron bar or other tool to pass through the through hole and press the pressure block inward. In this way, the pressure block will move along the guide post and compress the support spring, thereby pushing the wheel axle to move and put the roller combination lock in a state where the combination can be changed. Then the user can rotate the roller to change the combination.

[0003] However, the above-mentioned U-shaped combination lock also has its shortcomings: the top pressing block is always subject to the elastic force of the support spring, which means that when changing the combination, the user needs to keep the top pressing block pressed down with one hand. Once released, the top pressing block will be immediately pushed up by the support spring, which makes it difficult to operate as the user can only rely on one hand to turn the roller. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a U-shaped combination lock, which solves the problem of inconvenient operation when changing the combination.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A U-shaped combination lock includes a lock body and a U-shaped locking beam with both ends insertable into the lock body. The lock body contains a locking mechanism that locks the locking beam to the lock body. The locking mechanism includes a roller combination lock, which comprises an axle, a return spring sleeved on one end of the axle, a code-changing component sleeved on the axle, and a number wheel sleeved outside the code-changing component and fixed to the lock body along the axial direction of the axle. The return spring acts on the axle and the code-changing component respectively. The lock body also includes an operating component, characterized in that the operating component is cylindrical and perpendicular to the axle, and has a circular... The lock body consists of a columnar support, a circular pusher fixed to the outer end of the support, and an operating head fixed to the outer end of the pusher. The operating head protrudes from the lock body, and the centerline of the operating head is collinear with the centerline of the support. The outer diameter of the pusher is larger than that of the support, and the pusher is eccentrically positioned relative to the support. The adjusting element is located on the outer periphery of the pusher. The operating element can rotate around the centerline of the support and move by pushing the adjusting element against the spring force of the return spring through the outer periphery of the pusher. A limiting structure is provided between the operating element and the lock body to limit the rotation angle of the operating element.

[0007] When the roller combination lock is locked, the locking mechanism cannot be operated. To change the combination, first move the number wheel to the correct number, then the user rotates the operating mechanism using the operating head, causing it to rotate around the center line of the support. Since the code-changing component is located on the outer periphery of the pusher on the operating mechanism, and the outer diameter of the pusher is larger than that of the support and it is eccentrically positioned relative to the support, the rotation of the operating mechanism around the center line of the support creates a thrust on the code-changing component through the outer wall of the pusher. This pushes the code-changing component to overcome the spring force of the return spring, causing it to disengage from the number wheel. The roller combination lock is then ready to change the combination; the user simply needs to rotate the number wheel to change the combination. After changing the combination, the user rotates the tool in the opposite direction to return the operating mechanism to its initial state around the center line of the support. The pusher no longer exerts a thrust on the code-changing component, and the code-changing component re-engages with the number wheel under the action of the return spring.

[0008] This U-shaped combination lock features a cylindrical operating component perpendicular to the axle. The component includes a cylindrical support, a circular pusher fixed to the outer end of the support, and an operating head fixed to the outer end of the pusher. This changes the operating mechanism from a downward push to a rotary push, and the component's reset is achieved by the user's active rotation. This eliminates the need for the user to use one hand to control the operating component when changing the combination, as is common in existing technologies, significantly improving ease of use. Since the operating component is located within the lock body and its rotation is not visible to the user, a limiting structure is incorporated between the component and the lock body to restrict its rotation angle. This limiting structure limits the maximum rotation angle of the operating component, preventing excessive rotation and invalid combination changes.

[0009] In the aforementioned U-shaped combination lock, the limiting structure includes a limiting protrusion protruding from the side of the support portion and a limiting groove disposed within the lock body. The limiting protrusion is located within the limiting groove, which has two limiting walls. The operating member can rotate from the point where the limiting protrusion abuts against one of the limiting walls to the point where the limiting protrusion abuts against the other limiting wall.

[0010] Under normal circumstances, the limiting protrusion abuts against one of the limiting walls in the limiting groove. When the password needs to be changed, rotate the operating component until the limiting protrusion abuts against the other limiting wall in the limiting groove, thereby preventing the operating component from being rotated excessively and causing the user to perform an invalid password change.

[0011] In the aforementioned U-shaped combination lock, reinforcing ribs are integrally fixed between the limiting protrusion, the outer peripheral wall of the support part, and the inner end face of the pushing part.

[0012] The addition of reinforcing ribs can increase the strength of the limiting protrusion, preventing the limiting protrusion from breaking if the user continues to rotate in that direction after it has already come into contact with the limiting wall.

[0013] In the aforementioned U-shaped combination lock, as another technical solution, the limiting structure includes a limiting block disposed in the lock body and an arc-shaped limiting groove disposed on the outer periphery of the support part. The limiting block is located in the limiting groove, and the operating member can rotate from one end of the groove wall abutting against the limiting block to the other end of the groove wall abutting against the limiting block.

[0014] Under normal circumstances, one end of the limiting groove abuts against the limiting block. When the password needs to be changed, rotate the operating component until the other end of the limiting groove abuts against the limiting block, thus preventing the operating component from being rotated excessively and causing the user to perform an invalid password change.

[0015] In the aforementioned U-shaped combination lock, the lock body has a through hole on its side, the outer end of the operating head is located inside the through hole, and the outer end of the operating head has an insertion hole.

[0016] The outer end of the operating head is located inside the through hole, preventing others from using tools to clamp the outer end of the operating head to rotate the operating component. Only by inserting a special tool into the socket can the operating component be rotated, thus ensuring the security of this U-shaped combination lock.

[0017] In the aforementioned U-shaped combination lock, the outer peripheral wall of the push part protrudes radially beyond the operating head, and the outer end face of the push part abuts against the inner wall of the lock body where the through hole is located, or the outer end face of the push part is slightly lower than the inner wall of the lock body where the through hole is located.

[0018] The above settings ensure that the operating component will not shift along its axial direction, thus preventing the adjustment component and the jacking part from failing to match accurately.

[0019] In the aforementioned U-shaped combination lock, the lock body has a columnar portion, and the inner end of the support portion is provided with a socket hole, into which the columnar portion is inserted. By inserting the columnar portion into the socket hole, the operating element can rotate around the center line of the support portion.

[0020] Compared with existing technologies, this U-shaped combination lock changes the operation mode of the operating component from the existing downward pushing method to a rotational pushing method by setting the operating component in a columnar shape and perpendicular to the wheel axle. The operating component has a cylindrical support part, a circular block-shaped pushing part fixed to the outer end of the support part, and an operating head fixed to the outer end of the pushing part. Moreover, the reset of the operating component is also completed by the user's active rotation. In this way, the user does not need to use one hand to control the operating component, which improves the convenience of operation when changing the password. Attached Figure Description

[0021] Figure 1 This is a plan view of this U-shaped combination lock.

[0022] Figure 2 yes Figure 1 Sectional view along the AA direction.

[0023] Figure 3 This is a three-dimensional schematic diagram of the inside of the lock body.

[0024] Figure 4 This is a 3D schematic diagram of the lock body after the number wheel has been removed.

[0025] Figure 5 This is a planar schematic diagram of the interior of the lock body.

[0026] Figure 6 This is a three-dimensional schematic diagram of the operating components.

[0027] In the diagram, 1. Lock body; 1a. Lock hole; 1b. Columnar part; 1c. Through hole; 1d. Limiting groove; 1e. Limiting wall; 2. Lock beam; 3. Roller combination lock; 4. Wheel axle; 4a. Annular shoulder; 5. Return spring; 6. Code adjustment component; 6a. Socket; 7. Number wheel; 8. Unlocking plate; 8a. Insert plate; 8b. Blocking part; 8c. Paddle; 9. Lock tongue; 10. Operating component; 10a. Support part; 10a1. Socket hole; 10b. Pushing part; 10c. Operating head; 10c1. Socket hole; 10d. Limiting protrusion; 10e. Reinforcing rib. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] Example 1

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the U-shaped combination lock includes a lock body 1 and a U-shaped locking beam 2. The lock body 1 is a rectangular block with lock holes 1a at both ends. The two ends of the locking beam 2 can be inserted into the two lock holes 1a. The lock body 1 has a locking mechanism that locks the locking beam 2 to the lock body 1. The locking mechanism includes a roller combination lock 3, an unlocking plate 8, and a long strip-shaped locking tongue 9. The roller combination lock 3 includes a wheel axle 4, a return spring 5 sleeved on one end of the wheel axle 4, a code adjustment piece 6 sleeved on the wheel axle 4, and a number wheel 7 sleeved outside the code adjustment piece 6 and fixed to the lock body 1 along the axial direction of the wheel axle 4. The axial direction of the wheel axle 4 is the length direction of the lock body 1. The two ends of the return spring 5 act on the wheel axle 4 and the code adjustment piece 6, respectively. In this embodiment, the end of the wheel axle 4 where the return spring 5 is sleeved has an annular shoulder 4a, and the return spring 5 abuts against the annular shoulder 4a. The unlocking plate 8 is parallel to the center line of the wheel axle 4. Both the digital wheel 7 and the adjusting component 6 partially pass through the unlocking plate 8. A mortise-and-tenon joint structure is provided between the digital wheel 7 and the adjusting component 6. The adjusting component 6 has a socket 6a on its side near the return spring 5. An insert 8a is provided on the unlocking plate 8 at the point where the digital wheel 7 and the adjusting component 6 pass through. Rotation of the adjusting component 6 allows the socket 6a to align with or be misaligned with the insert 8a. The unlocking plate 8 has a folded blocking portion 8b. One end of the axle 4 with an annular shoulder 4a abuts against the blocking portion 8b. When the adjusting component 6 rotates until the socket 6a aligns with the insert 8a, the unlocking plate 8 can push the axle 4 to move and insert the insert 8a into the socket 6a. The length direction of the latch 9 is consistent with that of the axle 4. The latch 9 is linked to the unlocking plate 8. A slot is provided on the outer side of the end of the lock beam 2. Movement of the unlocking plate 8 can cause the latch 9 to extend into the lock hole 1a and insert into the slot, or retract from the lock hole 1a into the lock body 1. The unlocking plate 8 is equipped with a lever 8c that extends out of the lock body 1.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the lock body 1 is equipped with an operating member 10, which is cylindrical and perpendicular to the wheel axle 4. The operating member 10 has a cylindrical support portion 10a, a circular push portion 10b fixed to the outer end of the support portion 10a, and an operating head 10c fixed to the outer end of the push portion 10b. The operating head 10c protrudes from the lock body 1, and its centerline is collinear with the centerline of the support portion 10a. The outer diameter of the push portion 10b is larger than that of the support portion 10a, and the push portion 10b is eccentrically positioned relative to the support portion 10a. The adjusting member 6 is located on the outer periphery of the push portion 10b. The operating member 10 can rotate around the centerline of the support portion 10a and move by pushing the adjusting member 6 against the action of the return spring 5 through the outer periphery of the push portion 10b. Specifically, the lock body 1 has a columnar portion 1b, and the inner end of the support portion 10a is provided with a socket hole 10a1. The columnar portion 1b is inserted into the socket hole 10a1, so that the operating member 10 can rotate around the center line of the support portion 10a. In this embodiment, the dialing member 6 is wheel-shaped and T-shaped. The digital wheel 7 is sleeved on the smaller outer diameter portion of the dialing member 6 and abuts against the larger outer diameter portion of the dialing member 6. The smaller outer diameter portion of the dialing member 6 extends out of the wheel axle 4 and is located on the side of the pushing portion 10b. A notch is provided on the larger outer diameter portion of the dialing member 6. The insertion structure is located on the digital wheel 7 and the smaller outer diameter portion of the dialing member 6. The insertion structure includes several slots arranged circumferentially on the wall of the central hole of the digital wheel 7 and several blocks arranged circumferentially on the smaller outer diameter portion of the dialing member 6. The lock body has several digital wheels 7 and several dialing components 6, which abut against each other in sequence. The return spring 5 abuts against the larger outer diameter of the nearest dialing component 6, while the smaller outer diameter of the dialing component 6 furthest from the return spring 5 extends out of the wheel axle 4 and is located on the side of the push part 10b. The side of the lock body 1 has a through hole 1c, and the outer end of the operating head 10c is located inside the through hole 1c. The outer end of the operating head 10c has an insertion hole 10c1. The outer peripheral wall of the push part 10b protrudes radially from the operating head 10c. The outer end face of the push part 10b abuts against the inner wall of the lock body 1 where the through hole 1c is located, or the outer end face of the push part 10b is slightly lower than the inner wall of the lock body 1 where the through hole 1c is located.

[0032] Furthermore, such as Figure 5 and Figure 6As shown, a limiting structure for restricting the rotation angle of the operating member 10 is provided between the operating member 10 and the lock body 1. The limiting structure includes a limiting protrusion 10d protruding from the side of the support part 10a and a limiting groove 1d provided in the lock body 1. The limiting protrusion 10d is located in the limiting groove 1d, and the limiting groove 1d has two limiting walls 1e. The operating member 10 can rotate from the point where the limiting protrusion 10d abuts against one of the limiting walls 1e to the point where the limiting protrusion 10d abuts against the other limiting wall 1e. Under normal circumstances, the limiting protrusion 10d abuts against one of the limiting walls 1e in the limiting groove 1d. When the password needs to be changed, the operating member 10 is rotated until the limiting protrusion 10d abuts against the other limiting wall 1e in the limiting groove 1d. A reinforcing rib 10e is integrally fixed between the limiting protrusion 10d, the outer peripheral wall of the support part 10a, and the inner end face of the pushing part 10b.

[0033] In the locked state, the bolt 9 extends into the lock hole 1a and is inserted into the slot of the lock beam 2. The slot 6a on the dialing component 6 is misaligned with the slot 8a on the unlocking plate 8. The slot 8a is held in place by the dialing component 6, preventing the unlocking plate 8 from moving by pushing the wheel shaft 4 through the blocking part 8b. During unlocking, the number wheel 7 is rotated to the correct number, aligning the slot 6a on the dialing component 6 with the slot 8a on the unlocking plate 8. The slot 6a provides space for the slot 8a to move, allowing the user to move the unlocking plate 8 by turning the lever 8c, which in turn moves the bolt 9 back into the lock body 1. After the user releases the lever 8c, the unlocking plate 8 resets under the action of the return spring 5, causing the bolt 9 to re-enter the lock hole 1a.

[0034] When the password needs to be changed, rotate the number wheel 7 to the correct number so that the slot 6a on the dialing component 6 aligns with the slot 8a on the unlocking piece 8. Then, the user inserts a tool into the socket 10c1 of the operating component 10 and rotates it, causing the operating component 10 to rotate around the center line of the support part 10a. Since the smaller outer diameter of the dialing component 6 is located on the outer periphery of the push part 10b on the operating component 10, and the push part 10b is eccentrically positioned relative to the support part 10a, the rotation of the operating component 10 around the center line of the support part 10a creates a pushing force on the dialing component 6 through the outer peripheral wall of the push part 10b. This pushes the dialing component 6 to overcome the elastic force of the return spring 5 and move it, thereby disengaging the dialing component 6 from the number wheel 7 circumferentially. In this way, the roller combination lock 3 is in a password-changeable state, and the user can change the password simply by rotating the number wheel 7. After the password is changed, the user rotates the tool in the opposite direction to make the operating part 10 rotate back to the initial state with the center line of the support part 10a as the center. The pushing part 10b no longer exerts a pushing force on the code-changing part 6, and the code-changing part 6 re-engages with the digital wheel 7 under the action of the reset spring 5.

[0035] This U-shaped combination lock features an operating component 10 shaped like a column and perpendicular to the axle 4. The operating component 10 has a cylindrical support part 10a, a circular push part 10b fixed to the outer end of the support part 10a, and an operating head 10c fixed to the outer end of the push part 10b. This changes the operating method of the operating component 10 from the existing downward push method to a rotational push method. Moreover, the reset of the operating component 10 is also accomplished by the user's active rotation. In this way, the user does not need to use one hand to control the operating component 10 when changing the combination, as in the prior art, thus improving the convenience of changing the combination.

[0036] Example 2

[0037] This embodiment is basically the same as Embodiment 1 in structure and principle, except that: in this embodiment, the limiting structure includes a limiting block disposed within the lock body 1 and an arc-shaped limiting groove disposed on the outer periphery of the support portion 10a. The limiting block is located within the limiting groove, and the operating member 10 can rotate from one end of the groove wall abutting against the limiting block to the other end of the groove wall abutting against the limiting block. Under normal circumstances, one end of the groove wall abuts against the limiting block. When the password needs to be changed, the operating member 10 is rotated until the other end of the groove wall abuts against the limiting block.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A U-shaped combination lock, comprising a lock body (1) and a U-shaped locking beam (2) with both ends insertable into the lock body (1), wherein the lock body (1) is provided with a locking mechanism that locks the locking beam (2) to the lock body (1), the locking mechanism comprising a roller combination lock (3), the roller combination lock (3) comprising a wheel axle (4), a return spring (5) sleeved on one end of the wheel axle (4), a code adjustment component (6) sleeved on the wheel axle (4), and a number wheel (7) sleeved outside the code adjustment component (6) and fixed to the lock body (1) along the axial direction of the wheel axle (4), wherein the two ends of the return spring (5) act on the wheel axle (4) and the code adjustment component (6) respectively, and the lock body (1) is also provided with an operating component (10), characterized in that, The operating member (10) is cylindrical and perpendicular to the wheel axle (4). The operating member (10) has a cylindrical support part (10a), a circular block-shaped push part (10b) fixed to the outer end of the support part (10a), and an operating head (10c) fixed to the outer end of the push part (10b). The operating head (10c) protrudes outside the lock body (1). The center line of the operating head (10c) is collinear with the center line of the support part (10a). The outer diameter of the push part (10b) is greater than that of the lock body (1). The support part (10a) and the push part (10b) are eccentrically arranged relative to the support part (10a). The adjustment member (6) is located on the outer periphery of the push part (10b). The operating member (10) can rotate around the center line of the support part (10a) and push the adjustment member (6) through the outer periphery of the push part (10b) to overcome the elastic force of the return spring (5) and move. A limiting structure for limiting the rotation angle of the operating member (10) is provided between the operating member (10) and the lock body (1).

2. The U-shaped combination lock according to claim 1, characterized in that, The limiting structure includes a limiting protrusion (10d) protruding from the side of the support (10a) and a limiting groove (1d) provided in the lock body (1). The limiting protrusion (10d) is located in the limiting groove (1d), and the limiting groove (1d) has two limiting walls (1e). The operating member (10) can rotate from the limiting protrusion (10d) abutting against one of the limiting walls (1e) to the limiting protrusion (10d) abutting against the other limiting wall (1e).

3. The U-shaped combination lock according to claim 2, characterized in that, A reinforcing rib (10e) is integrally fixed between the outer peripheral wall of the limiting protrusion (10d), the support part (10a), and the inner end face of the pushing part (10b).

4. The U-shaped combination lock according to claim 1, characterized in that, The limiting structure includes a limiting block disposed in the lock body (1) and a limiting groove that is arc-shaped and disposed on the outer periphery of the support part (10a). The limiting block is located in the limiting groove, and the operating member (10) can rotate from one end of the groove wall abutting against the limiting block to the other end of the groove wall abutting against the limiting block.

5. The U-shaped combination lock according to claim 2 or 4, characterized in that, The lock body (1) has a through hole (1c) on its side, and the outer end of the operating head (10c) is located inside the through hole (1c). The outer end of the operating head (10c) has an insertion hole (10c1).

6. The U-shaped combination lock according to claim 5, characterized in that, The outer peripheral wall of the push part (10b) protrudes radially from the operating head (10c), and the outer end face of the push part (10b) abuts against the inner wall of the lock body (1) where the through hole (1c) is located, or the outer end face of the push part (10b) is slightly lower than the inner wall of the lock body (1) where the through hole (1c) is located.

7. The U-shaped combination lock according to claim 1, characterized in that, The lock body (1) has a columnar part (1b) inside, and the inner end of the support part (10a) is provided with a socket hole (10a1), and the columnar part (1b) is inserted into the socket hole (10a1).

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