U-shaped coded lock

Abstract

The utility model provides a U-shaped coded lock, and belongs to the technical field of locks. The problem of insufficient reliability is solved. The lock comprises a lock body and a U-shaped lock beam, a locking mechanism capable of locking the lock beam and the lock body is further arranged in the lock body, the locking mechanism comprises a rolling wheel coded lock, the outer wheel face part of a rolling wheel in the rolling wheel coded lock is exposed out of the lock body, and a jacking block and a supporting spring are arranged in the lock body. The two ends, in the direction perpendicular to a wheel shaft in the roller coded lock, of the jacking block are the first end and the second end respectively, a guide column is arranged in the lock body, a guide hole penetrating through the second end of the jacking block is formed in the jacking block, the guide column is partially located in the guide hole, and the supporting spring acts on the jacking block and enables the first end of the jacking block to abut against the inner wall of the lock body. A through hole is formed in the position, corresponding to the abutting position of the first end of the jacking block, of the outer side of the lock body, the jacking block abuts against one end of the wheel shaft, and when the jacking block overcomes the elastic force of the supporting spring to move, the wheel shaft can be pushed to move horizontally. And the reliability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of locks and relates to a U-shaped password lock. Background Art

[0002] U-shaped locks are widely used. Traditional U-shaped locks are mechanical and unlocked by inserting a key. As people's demand for convenience continues to improve, U-shaped password locks have appeared on the market. It does not require a key to be inserted, and the user only needs to enter a password to unlock it.

[0003] For example, a U-shaped combination lock disclosed in patent application No. 202223462324.6 includes a shell, a lock beam, and a combination lock part. The combination lock part is installed in the shell, and the lock beam is inserted into the shell. Two lock blocks that can respectively clamp the lock beam are provided in the shell. The combination lock part has a lock plate that extends between the two lock blocks when locked and disengages from the two lock blocks when unlocked; it also includes a movable block and a push button slidably connected to the shell, the movable block is provided with a V-shaped guide surface, and the two lock blocks are respectively provided with inclined surfaces that abut the V-shaped guide surface of the movable block. A first slope is provided on the back side of the movable block away from the V-shaped guide surface, and a second slope that matches the first slope is provided on the side of the push button facing the movable block. When the push button is in a sliding state, the first slope is pushed by the second slope to drive the movable block to press against the two lock blocks to unlock. The combination lock part includes a wheel shaft, a combination wheel, a code adjustment wheel and a code changer. The code changer is movably arranged on the wheel shaft. The housing is provided with a push rod that moves up and down. The code changer has a third slope. The push rod abuts against the third slope. The position where the push rod abuts against the third slope is provided with a fourth slope that matches the third slope. When the password is correct, the push rod presses the third slope of the code changer to drive the code changer to move along the axial direction of the wheel shaft to enter the password change state. When all the combination wheels are rotated to the correct position, the lock plate is disengaged from between the two lock blocks, thereby achieving unlocking.

[0004] When the password needs to be changed, the push rod is pressed down, so that the push rod moves along the third slope through the fourth slope, and the code-changing part and the wheel axle are pushed together, so that the entire password lock part is in a password-changeable state. Combined with the drawings in the specification, it can be seen that after the push rod is released by the user, when the wheel axle is driven to move by the spring in the password lock part, the push rod is pushed back to the initial position by the code-changing part moving along the fourth slope through the third slope. However, in practice, it is easy for the push rod to be pressed too far, causing the third slope and the fourth slope to be directly misaligned. At this time, the push rod and the code-changing part will be stuck to each other, causing the wheel axle to be unable to be reset, so there is a problem of insufficient reliability. Utility Model Content

[0005] The purpose of the utility model is to propose a U-shaped password lock to solve the problem of insufficient reliability in view of the above problems in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A U-shaped password lock comprises a long strip lock body and a U-shaped lock beam, the lock body having two lock holes arranged in parallel, and the lock body is also provided with a locking mechanism that can lock the lock beam and the lock body when the two ends of the lock beam are inserted into the two lock holes, and the locking mechanism comprises a roller password lock, the outer wheel surface portion of the roller in the roller password lock is exposed outside the lock body, and it is characterized in that a top pressure block and a support spring are provided in the lock body, the two ends of the top pressure block along the direction perpendicular to the wheel axle in the roller password lock are respectively a first end and a second end, the lock body is provided with a guide column, the top pressure block has a guide hole penetrating its second end, the guide column part is located in the guide hole, the support spring acts on the top pressure block and makes its first end abut against the wall of the lock body, the outer side of the lock body is provided with a through hole corresponding to the abutment position of the first end of the top pressure block, the top pressure block abuts against one end of the wheel axle, and can push the wheel axle to translate when the top pressure block overcomes the elastic force of the support spring and moves.

[0008] Under normal conditions, the first end of the push block rests against the inner wall of the lock body under the elastic force of the support spring. To change the password of the roller combination lock, first rotate the roller in the roller combination lock to the correct position, and then the user uses a small iron rod or other tool to pass through the through hole and push the push block inward, so that the push block will move along the guide column and compress the support spring, thereby pushing the wheel axle to translate and put the roller combination lock in a state where the password can be changed. Then the user can rotate the roller to change the password. After the password is changed, the user releases the push block, and the push block no longer presses the wheel axle. The wheel axle will be reset under the action of the reset spring in the roller combination lock, and the push block will automatically reset upward to the initial state under the elastic force of the support spring.

[0009] The U-shaped combination lock uses the cooperation of the guide column and the guide hole to guide the movement of the top pressure block so that it will not be skewed, and combines a separately arranged support spring to support the top pressure block and provide elastic force for resetting, so that the resetting of the top pressure block is no longer dependent on the resetting of the wheel axle, that is, the top pressure block and the wheel axle are reset separately, thereby avoiding the situation where the top pressure block and the wheel axle are stuck to each other, thereby improving reliability.

[0010] In the above-mentioned U-shaped combination lock, the support spring is sleeved outside the guide column, and the two ends of the support spring are respectively against the inner wall of the lock body and the second end of the top pressure block.

[0011] Through the above arrangement, the elastic force of the support spring can stably act on the top pressure block in a direction perpendicular to the wheel axle of the roller combination lock, thereby ensuring that the top pressure block can stably return to its position when the user releases the top pressure block to avoid the situation where the top pressure block and the wheel axle are stuck to each other.

[0012] In the above-mentioned U-shaped combination lock, as another technical solution, the support spring is located in the guide hole, and both ends of the support spring respectively abut against one end of the guide column located in the guide hole and the bottom wall of the guide hole.

[0013] Through the above arrangement, the elastic force of the support spring can stably act on the top pressure block in a direction perpendicular to the wheel axle of the roller combination lock, thereby ensuring that the top pressure block can stably return to its position when the user releases the top pressure block to avoid the situation where the top pressure block and the wheel axle are stuck to each other.

[0014] In the above-mentioned U-shaped combination lock, the pressing block has a guide surface, the guide surface abuts against the wheel axle, the guide surface is inclined, and the distance from the guide surface to the other end of the wheel axle gradually increases from the first end of the pressing block to the second end.

[0015] When the user uses a tool to push the pressing block inward through the through hole and compress the support spring, the guide surface will move along the end of the wheel axle it abuts against. Since the guide surface is inclined and the distance from the guide surface to the other end of the wheel axle gradually increases from the first end of the pressing block to the second end, the guide surface will generate thrust on the wheel axle during the movement of the pressing block, thereby pushing the wheel axle to translate, so that the roller combination lock is in a state where the password can be changed (of course, this is when the roller combination lock is in a state where the password is correct).

[0016] In the above-mentioned U-shaped combination lock, the guide hole is a square hole, and the shape of the guide column matches the guide hole.

[0017] Through the above arrangement, the direction of the guide surface can be quickly positioned during assembly and it can be ensured that the pressing block will not deflect during the assembly process.

[0018] In the above-mentioned U-shaped combination lock, the first end of the pressing block is protrudingly provided with a protruding portion, and the protruding portion is located in the through hole.

[0019] The protrusion fills the through hole, thus preventing the through hole from being blocked by other things and causing the user to be unable to operate the top pressure block.

[0020] In the above-mentioned U-shaped combination lock, the through hole and the outer wheel surface of the roller exposed outside the lock body are located on the same side of the lock body.

[0021] The through hole and the outer wheel surface exposed outside the lock body are located on the same side of the lock body, which means that the sight angle when the user presses the pressing block is the same as the sight angle when the user changes the password, thereby improving the user's operating convenience.

[0022] Compared with the prior art, this U-shaped password lock has the following advantages:

[0023] 1. On the basis of using the cooperation between the guide column and the guide hole to guide the movement of the top pressure block so that it will not be skewed, a separately arranged support spring is combined to support the top pressure block and provide elastic force for resetting, so that the resetting of the top pressure block is no longer dependent on the resetting of the wheel axle, that is, the top pressure block and the wheel axle are reset separately, thereby avoiding the situation where the top pressure block and the wheel axle are stuck with each other, and improving reliability;

[0024] 2. By setting a top pressure block to directly abut against one end of the wheel axle of the roller combination lock and directly pushing the wheel axle to move by the top pressure block, the use of other matching parts is omitted, making the overall structure simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the U-shaped combination lock.

[0026] Figure 2 It is a three-dimensional schematic diagram of the lock body.

[0027] Figure 3 It is a plan view of the lock body.

[0028] Figure 4 yes Figure 3 Sectional view along AA direction.

[0029] Figure 5 This is a schematic diagram of the inside of the lock body.

[0030] Figure 6 It is a three-dimensional schematic diagram of the locking mechanism in the unlocked state.

[0031] Figure 7 It is a three-dimensional schematic diagram of the locking mechanism in the unlocked state from another angle.

[0032] Figure 8 It is an exploded schematic diagram of the locking mechanism in the unlocked state (unlocked state).

[0033] Fig. 9 It is a three-dimensional schematic diagram of the locking mechanism in the locked state.

[0034] In the figure, 1, lock body; 1a, lock hole; 1b, support part; 1c, guide column; 1d, through hole; 2, lock beam; 3, roller combination lock; 3a, wheel axle; 3a1, shoulder; 3b, roller; 3c, locking wheel; 3c1, locking recess; 3d, reset spring; 4, locking plate; 4a, limiting part; 4b, locking protrusion; 5, locking block; 5a, clearance groove; 5b, matching part; 6, locking spring; 7, action spring; 8, button; 8a, action part; 9, top pressure block; 9a, guide hole; 9b, guide surface; 9c, protrusion; 10, support spring. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0036] Embodiment 1

[0037] like Figure 1-Figure 8As shown, a U-shaped password lock comprises a long strip lock body 1 and a U-shaped lock beam 2, the lock body 1 has two parallel lock holes 1a, the two ends of the lock beam 2 can be inserted into the two lock holes 1a, and a locking mechanism is provided in the lock body 1, which can lock the lock beam 2 and the lock body 1 when the two ends of the lock beam 2 are inserted into the two lock holes 1a, wherein the locking mechanism comprises a roller password lock 3, a lock plate 4 and two locking blocks 5. The two locking blocks 5 are both slidably arranged in a direction perpendicular to the center line of the lock hole 1a, and the two locking blocks 5 are arranged oppositely. The lock body 1 is also provided with two locking springs 6, and the two locking springs 6 act on the two locking blocks 5 respectively. The two locking blocks 5 can extend into the two lock holes 1a respectively under the action of the two locking springs 6, and the two ends of the lock beam 2 have a card slot respectively, and the card slots at the two ends of the lock beam 2 are arranged oppositely. When the two ends of the lock beam 2 are inserted into the two lock holes 1a, the two locking blocks 5 will be inserted into the two card slots respectively under the action of their respective locking springs 6. The roller combination lock 3 includes a wheel shaft 3a, a plurality of rollers 3b, a plurality of locking wheels 3c and a reset spring 3d. The lock body 1 has two oppositely arranged supporting parts 1b. The two ends of the wheel shaft 3a are respectively against the two supporting parts 1b and the length direction of the wheel shaft 3a is consistent with the length direction of the lock body 1. The wheel shaft 3a has a stop shoulder 3a1 near one end. Each locking wheel 3c and the reset spring 3d are sequentially sleeved on the wheel shaft 3a. One end of the reset spring 3d is against the supporting part 1b against which the other end of the wheel shaft 3a is against. Each locking wheel 3c is axially against the stop shoulder 3a1 and the other end of the reset spring 3d. In between, each roller 3b is respectively sleeved on the outside of each locking wheel 3c and the outer wheel surface of each roller 3b is partially exposed outside the lock body 1, and a plug-in structure with a concave-convex fit is provided between each locking wheel 3c and the sleeved roller 3b. When the wheel axle 3a translates, the shoulder 3a1 can drive each locking wheel 3c to move synchronously and compress the reset spring 3d, and when each locking wheel 3c moves, the plug-in structure between it and the sleeved roller 3b can be disengaged. After the plug-in structure is disengaged, the password can be changed by rotating the roller 3b. The specific structure and principle of the roller combination lock 3 are the same as the existing ones, which will not be repeated here. The locking plate 4 is located between each locking wheel 3c and the inner wall of the lock body 1. An action spring 7 is provided between the locking plate 4 and the inner wall of the lock body 1. The locking plate 4 abuts against each locking wheel 3c under the elastic force of the action spring 7. One side of the locking plate 4 has a plate-shaped limiting portion 4a, and the limiting portion 4a is located between the two locking blocks 5. The adjacent ends of the two locking blocks 5 are each provided with a clearance groove 5a, and the two clearance grooves 5a are arranged opposite to each other. The outer wheel surface of each locking wheel 3c has a locking recess 3c1, and the locking plate 4 is correspondingly provided with a plurality of locking protrusions 4b. When the locking protrusion 4b is located in the locking recess 3c1, the limiting portion 4a is located between the two clearance grooves 5a. At this time, due to the existence of the two clearance grooves 5a, the two locking blocks 5 can be close to each other without the existence of the limiting portion 4a. This state is an unlocked state and as Figure 7When each locking wheel 3c rotates until the locking notch 3c1 is staggered with the locking protrusion 4b, each locking wheel 3c will squeeze the locking plate 4 until the limiting portion 4a is located between the ends of the two locking blocks 5. That is to say, in this state, the limiting portion 4a will be blocked between the ends of the two locking blocks 5 so that the two locking blocks 5 cannot move into the lock body 1. This state is a locked state and as shown in FIG. Fig. 9 shown.

[0038] In this embodiment, if Figure 5 and Figure 6 As shown, a button 8 is also provided in the locking block 5. The button 8 is slidably arranged in a direction parallel to the lock hole 1a, and a part of the button 8 extends out of the locking block 5. The button 8 located in the locking block 5 has two oppositely arranged action parts 8a. The two action parts 8a are arranged oppositely. The opposite sides of the two action parts 8a are both action surfaces. Both action surfaces are inclined surfaces. The inclination directions of the two action surfaces are opposite and the inclination angles are the same. The distance between the two action surfaces gradually decreases from the part of the button 8 located in the lock body 1 to the part located outside the lock body 1. The ends of the two locking blocks 5 that are close to each other each have a matching part 5b. The two matching parts 5b are located between the two action parts 8a. One matching part 5b abuts against the action surface of one action part 8a, and the other matching part 5b abuts against the action surface of the other action part 8a. When the button 8 slides toward the lock body 1, the button 8 pushes the two locking blocks 5 to approach each other through the two action surfaces to unlock the lock beam 2.

[0039] Furthermore, if Figure 4 and Figure 5 As shown, a pressing block 9 and a supporting spring 10 are provided in the lock body 1. The two ends of the pressing block 9 along the direction perpendicular to the axle 3a in the roller combination lock 3 are respectively a first end and a second end. A guide column 1c is provided in the lock body 1. A guiding hole 9a is provided in the pressing block 9. The guiding hole 9a passes through the second end of the pressing block 9. A part of the guiding column 1c is located in the guiding hole 9a. The supporting spring 10 acts on the pressing block 9 to make its first end abut against the inner wall of the lock body 1. The pressing block 9 abuts against one end of the axle 3a. The end of the axle 3a abutting against the pressing block 9 is the end close to the shoulder 3a1. When the pressing block 9 overcomes the elastic force of the supporting spring 10 and moves, the axle 3a can be pushed to translate. Specifically, the pressing block 9 has a guiding surface 9b, which abuts against the axle 3a. The guiding surface 9b is inclined, and the distance from the guiding surface 9b to the other end of the axle 3a gradually increases from the first end of the pressing block 9 to the second end.

[0040] In this embodiment, if Figure 2 , Figure 3 and Figure 4As shown, the support spring 10 is sleeved outside the guide column 1c, and the two ends of the support spring 10 are respectively against the inner wall of the lock body 1 and the second end of the top pressure block 9. The guide hole 9a is a square hole, and the shape of the guide column 1c matches the guide hole 9a. Through such a setting, the direction of the guide surface 9b can be quickly located during assembly and the top pressure block 9 can be ensured not to deflect during the assembly process. The outer side of the lock body 1 is provided with a through hole 1d corresponding to the position where the first end of the top pressure block 9 abuts. The through hole 1d and the outer wheel surface of the roller 3b exposed outside the lock body 1 are located on the same side of the lock body 1. The first end of the top pressure block 9 is protrudingly provided with a protrusion 9c, which is located in the through hole 1d. The protrusion 9c fills the through hole 1d, so that the through hole 1d can be prevented from being blocked by other things, causing the user to be unable to operate the top pressure block 9.

[0041] Under normal conditions, the first end of the push block 9 abuts against the inner wall of the lock body 1 under the elastic force of the support spring 10. To change the password of the roller combination lock 3, first rotate the roller 3b in the roller combination lock 3 to the correct position, and then use a small iron rod or other tool to penetrate through the through hole 1d and push the push block 9 inward, so that the push block 9 will move along the guide column 1c and compress the support spring 10, thereby pushing the wheel shaft 3a to translate, and the wheel shaft 3a will drive each locking wheel 3c to move synchronously through the shoulder 3a1 and compress the reset spring 3d, and each locking wheel 3c moves so that the plug-in structure between it and the roller 3b is disengaged, and the roller combination lock 3 is in a state where the password can be changed, and the user only needs to rotate the roller 3b to change the password. After the replacement is completed, the user releases the pressing block 9, and the pressing block 9 no longer presses the axle 3a. The axle 3a and the locking wheels 3c are reset together under the elastic force of the reset spring 3d, and the pressing block 9 will automatically reset upward to the initial state under the elastic force of the support spring 10.

[0042] Embodiment 2

[0043] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the support spring 10 is located in the guide hole 9a, and the two ends of the support spring 10 respectively abut against one end of the guide column 1c located in the guide hole 9a and the bottom wall of the guide hole 9a.

[0044] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A U-shaped combination lock, comprising a long strip lock body (1) and a U-shaped lock beam (2), wherein the lock body (1) has two lock holes (1a) arranged in parallel, and the lock body (1) is further provided with a locking mechanism which can lock the lock beam (2) and the lock body (1) when the two ends of the lock beam (2) are inserted into the two lock holes (1a), the locking mechanism comprising a roller combination lock (3), the outer wheel surface of the roller (3b) in the roller combination lock (3) is partially exposed outside the lock body (1), characterized in that: The lock body (1) is provided with a pressing block (9) and a supporting spring (10). The two ends of the pressing block (9) along the direction perpendicular to the wheel axle (3a) in the roller combination lock (3) are respectively a first end and a second end. The lock body (1) is provided with a guide column (1c). The pressing block (9) is provided with a guide hole (9a) penetrating its second end. The guide column (1c) is partially located in the guide hole (9a). The supporting spring (10) acts on the pressing block (9) and makes its first end abut against the inner wall of the lock body (1). The outer side of the lock body (1) is provided with a through hole (1d) at a position corresponding to the abutment position of the first end of the pressing block (9). The pressing block (9) abuts against one end of the wheel axle (3a). When the pressing block (9) overcomes the elastic force of the supporting spring (10) and moves, it can push the wheel axle (3a) to move in translation.

2. A U-shaped combination lock according to claim 1, characterized in that: The support spring (10) is sleeved outside the guide column (1c), and the two ends of the support spring (10) are respectively against the inner wall of the lock body (1) and the second end of the top pressure block (9).

3. A U-shaped combination lock according to claim 1, characterized in that: The support spring (10) is located in the guide hole (9a), and the two ends of the support spring (10) respectively abut against one end of the guide column (1c) located in the guide hole (9a) and the bottom wall of the guide hole (9a).

4. A U-shaped combination lock according to claim 2 or 3, characterized in that: The pressing block (9) has a guide surface (9b), the guide surface (9b) abuts against the wheel axle (3a), the guide surface (9b) is inclined, and the distance from the guide surface (9b) to the other end of the wheel axle (3a) gradually increases from the first end of the pressing block (9) to the second end.

5. A U-shaped combination lock according to claim 2 or 3, characterized in that: The guide hole (9a) is a square hole, and the shape of the guide column (1c) matches the guide hole (9a).

6. A U-shaped combination lock according to claim 1, characterized in that: The first end of the pressing block (9) is provided with a protruding portion (9c), and the protruding portion (9c) is located in the through hole (1d).

7. A U-shaped combination lock according to claim 6, characterized in that: The through hole (1d) and the outer wheel surface of the roller (3b) exposed outside the lock body (1) are located on the same side of the lock body (1).

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