Box body coded lock

Abstract

The utility model relates to a box body coded lock, in particular to a box body coded lock with a code adjusting device arranged on the surface of an upper shell, which comprises a shell used for assembling a code assembly, the code assembly comprises a code wheel, an inner wheel and an unlocking piece, the code wheel and the inner wheel are in linkage fit, and the unlocking piece is matched with the code wheel and the inner wheel for locking and unlocking. The shell comprises an upper shell matched with the password wheel, the upper shell is provided with a limiting hole for the password wheel to stir, a code adjusting device matched with the unlocking piece is arranged at the position, close to the limiting hole, of the upper shell, and when a password is correct, the code adjusting device achieves starting and stopping of the code adjusting function through reciprocating motion on the upper shell. The optimized code adjusting device is placed on the outer surface of the upper shell, the code adjusting device can be exposed out of the storage box or the password box, the code adjusting function can be conveniently started, and the code adjusting device further has the advantages of being simple in structure, convenient to machine, easy to assemble and high in practicability.

Description

Technical Field

[0001] This utility model relates to a combination lock for a box, and more particularly to a combination lock for a box with a code-changing device disposed on the surface of the upper shell. Background Technology

[0002] Storage boxes and combination locks are usually equipped with a combination lock, and the key to unlock these locks is usually located on the back. Due to the small interior space and dim lighting, it is difficult to find the key to unlock the lock. This is also the case with the patent application number 201310750453.1, which is called "Luggage Combination Lock". How to make it easy to access the key to unlock the lock is a technical problem that we need to solve now. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a combination lock for a box.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a combination lock for a box, characterized in that it includes a housing for assembling a combination component, the combination component includes a combination wheel and an inner wheel that are linked together, and an unlocking piece that works with the combination wheel and the inner wheel to lock and unlock, the housing includes an upper shell that works with the combination wheel, the upper shell is provided with a limiting hole for the combination wheel to move, and a code adjustment device that works with the unlocking piece is provided on the upper shell near the limiting hole, when the combination is correct, the code adjustment device realizes the opening and closing of the code adjustment function through the reciprocating motion of the upper shell.

[0005] The code-changing device is provided with a guide surface that forces the inner wheel to move and disengage from the code wheel. The inner wheel is provided with a guide block that cooperates with the guide surface. The code-changing device realizes the code-changing function through reciprocating motion and the cooperation of the guide surface and the guide block.

[0006] The upper shell is provided with a limiting groove for the code adjustment device to reciprocate. The code adjustment device is provided with a push button that cooperates with the limiting groove. The code adjustment device realizes the limiting reciprocating motion on the upper shell through the cooperation of the limiting groove and the push button.

[0007] The unlocking plate is provided with a stop to prevent the code-switching device from moving, and the code-switching device is provided with a protrusion that cooperates with the stop. When the password is incorrect, the code-switching device and the unlocking plate can close the code-switching function through the cooperation of the stop and the protrusion.

[0008] The housing is equipped with an axle for mounting an inner wheel. The axial direction of the axle is perpendicular to the movement direction of the code-setting device. The unlocking plate is rotatably connected to the housing. The inner wheel has a groove, and the unlocking plate has a protrusion that matches the groove. When the password is correct, the unlocking plate is engaged in the groove through the protrusion to unlock.

[0009] The unlocking plate is equipped with an elastic device that forces the unlocking plate to move towards the inner wheel.

[0010] The cipher wheel is provided with a groove that works in conjunction with the inner wheel, and the inner wheel is provided with a protrusion that works in conjunction with the groove. The cipher wheel is sleeved on the outside of the inner wheel and is engaged with the inner wheel by the protrusion being inserted into the groove.

[0011] The housing includes a lower housing that is fixedly assembled with the upper housing, and the upper and lower housings are fixedly assembled by means of screws.

[0012] One end of the unlocking plate is provided with a locking block to lock the lock head, and the side of the lower shell is provided with a locking groove to cooperate with the lock head to move in and out. The lock head passes through the locking groove and is locked by the cooperation of the locking block.

[0013] The upper shell is provided with several elastic arms that can be easily snapped onto the carrier.

[0014] The beneficial effects of this utility model are as follows: This utility model sets up a code-changing device next to the combination wheel. The optimized code-changing device is placed on the outer surface of the upper shell, allowing the code-changing device to be exposed outside the storage box or combination box, making it convenient to open the code-changing function. This utility model also has the characteristics of simple structure, convenient processing and easy assembly, and strong practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of this utility model when the code switching function is enabled;

[0019] Figure 5 This is an exploded view of the structure of the combination of the password wheel, inner wheel and unlocking plate of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the cryptographic component of this utility model when the unlocking chip is in the upward position in the unlocked state;

[0021] Figure 7 This is a schematic diagram of the structure of the cryptographic component of this utility model when the unlocking piece is in the downward position in the locked state;

[0022] Figure 8 This is a schematic diagram of the coding device of this utility model.

[0023] In the diagram: 100, housing; 110, upper housing; 111, limiting hole; 112, limiting groove; 113, spring arm; 114, anti-reverse part; 120, lower housing; 200, combination lock assembly; 210, combination wheel; 211, groove; 220, inner wheel; 221, guide block; 222, groove; 223, protrusion; 230, unlocking plate; 231, stop part; 232, protrusion; 233, elastic device; 234, locking block; 240, wheel axle; 241, spring; 300, code adjustment device; 310, guide surface; 320, push button; 330, protrusion. Detailed Implementation

[0024] like Figures 1-8 As shown, a combination lock includes a housing 100 for assembling a combination component 200. The combination component 200 includes a combination wheel 210 and an inner wheel 220 that are linked together, and an unlocking piece 230 that works with the combination wheel 210 and the inner wheel 220 to lock and unlock. The housing 100 includes an upper shell 110 that works with the combination wheel 210. The upper shell 110 is provided with a limiting hole 111 for the combination wheel 210 to move. The upper shell 110 is provided with a code-adjusting device 300 that works with the unlocking piece 230 at a position close to the limiting hole 111. When the combination is correct, the code-adjusting device 300 realizes the opening and closing of the code-adjusting function through the reciprocating motion of the upper shell 110. For details on the specific usage method, please refer to the following text.

[0025] The code-changing device 300 is provided with a guide surface 310 that forces the inner wheel 220 to move and disengage from the code wheel 210. The inner wheel 220 is provided with a guide block 221 that cooperates with the guide surface 310. The code-changing device 300 realizes the code-changing function through reciprocating motion and the cooperation of the guide surface 310 and the guide block 221. The guide surface 310 has an inclination, and the guide surface 310 generates a thrust on the inner wheel 220 as the code-changing device 300 reciprocates.

[0026] The upper shell 110 is provided with a limiting groove 112 for the code adjustment device 300 to reciprocate in a limited manner. The code adjustment device 300 is provided with a push button 320 that cooperates with the limiting groove 112. The code adjustment device 300 realizes the limited reciprocating motion on the upper shell 110 through the cooperation of the limiting groove 112 and the push button 320. The limiting groove 112 is located on one side of the limiting hole 111, next to the code wheel 210.

[0027] The unlocking plate 230 is provided with a stop 231 to prevent the code switching device 300 from moving. The code switching device 300 is provided with a protrusion 330 that cooperates with the stop 231. When the password is wrong, the code switching device 300 and the unlocking plate 230 disable the code switching function through the cooperation of the stop 231 and the protrusion 330. Since the unlocking plate 230 is in the downward position when the password is wrong, the cooperation of the stop 231 and the protrusion 330 prevents the code switching device 300 from moving, thus preventing the code switching function from being enabled.

[0028] The housing 100 is provided with an axle 240 for mounting the inner wheel 220. The axial direction of the axle 240 is perpendicular to the movement direction of the code-setting device 300. The unlocking plate 230 is rotatably connected to the housing 100. The inner wheel 220 is provided with a groove 222, and the unlocking plate 230 is provided with a protrusion 232 that matches the groove 222. When the code is correct, the unlocking plate 230 is engaged in the groove 222 through the protrusion 232 to unlock. The unlocking plate 230 is always engaged with the lock. When the code is correct, that is, when the inner wheel 220 is in the correct position, it means that all the grooves 222 are facing the unlocking plate 230. The unlocking plate 230 has room to move upward and lifts up to release the lock, thus achieving the purpose of unlocking. The inner wheel 220 is sleeved on the axle 240, and the code wheel 210 is also sleeved on the axle 240 through the inner wheel 220.

[0029] The unlocking plate 230 is provided with an elastic device 233 that forces the unlocking plate 230 to move toward the inner wheel 220. The elastic device 233 is preferably a spring structure. Once the password is correct, the unlocking plate 230 will disengage from the lock head with the cooperation of the elastic device 233 to unlock.

[0030] The cipher wheel 210 is provided with a groove 211 that works in conjunction with the inner wheel 220. The inner wheel 220 is provided with a protrusion 223 that works in conjunction with the groove 211. The cipher wheel 210 is sleeved on the outside of the inner wheel 220 and is engaged in the groove 211 by the protrusion 223. The cipher wheel 210 and the inner wheel 220 are engaged in conjunction by the protrusion 223 engaging in the groove 211, and the engagement between the cipher wheel 210 and the inner wheel 220 is disengaged by the protrusion 223 disengaging from the groove 211.

[0031] The housing 100 includes a lower housing 120 that is fixedly assembled with the upper housing 110. The upper housing 110 and the lower housing 120 are fixedly assembled by screws. Most of the upper housing 110 and the lower housing 120 on the market are fixedly assembled by snap-fit, while this application uses screws for fastening, which makes the structure stable and reliable.

[0032] One end of the unlocking plate 230 is provided with a locking block 234 for locking the lock head. The side of the lower shell 120 is provided with a locking groove 121 that cooperates with the lock head (not shown in the figure) to enter and exit. The lock head is locked through the locking groove 121 and through the cooperation of the locking block 234. The lock head is the lock tongue, which belongs to the box body part and is not shown in the figure. The lock head locks the box door through the unlocking plate 230.

[0033] The upper shell 110 is provided with several spring arms 113 that are convenient to snap onto a carrier, which refers to an object such as a storage box or combination lock that requires a combination lock. Previously, the shell 100 was fixed to the box body with screws. However, it is more convenient to install the shell 100 by snapping it onto the box body with spring arms 113. Moreover, the anti-retraction part 114 on the spring arm 113 can firmly lock into the box body to prevent the shell 100 from being removed from the installation direction. It is equivalent to a barbed structure. A hollow structure can be set on the box body relative to the position of the spring arms 113 to facilitate the removal of the combination lock. Four spring arms 113 can be symmetrically arranged, which takes into account both structural stability and processing cost.

[0034] How to use:

[0035] When the password is incorrect, the inner wheel 220, which is not in the groove 222, is aligned with the unlocking plate 230. At this time, the unlocking plate 230 can only be in the downward position and firmly hooks the lock head, thus locking the lock body.

[0036] When unlocking is required, the combination wheel 210 is adjusted to the correct position. Since the inner wheel 220 is linked to the combination wheel 210, the inner wheel 220 also rotates. When all the combination wheels 210 are in the correct position, the grooves 222 on the inner wheel 220 are aligned with the unlocking plate 230. The unlocking plate 230 has room to move from the downward to the upward position. At the same time, with the cooperation of the elastic device 233, the unlocking plate 230 is lifted up and releases the lock, thus completing the unlocking.

[0037] When code adjustment is required, the password must be correct. When the password is incorrect, the unlocking plate 230 is in the downward position, and the presence of the stop 231 and the protrusion 330 prevents the code adjustment device 300 from moving, so the code adjustment device 300 cannot be moved. When the password is correct, the unlocking plate 230 is in the upward position, and the stop 231 and the protrusion 330 are no longer engaged, allowing the code adjustment device 300 to be moved. After the code adjustment device 300 is moved, due to the... The guide surface 310 on the 0-axis, together with the guide block 221, causes the protrusions 223 to disengage from the groove 211. This means that the linkage between the code wheel 210 and the inner wheel 220 is released. At this time, the code wheel 210 is turned to the desired code, and then the code adjustment device 300 is turned. With the cooperation of the spring 241 on the wheel axle 240, the protrusions 223 are re-engaged into the groove 211, and the code wheel 210 and the inner wheel 220 are linked again, waiting for the next code adjustment.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Simple modifications and substitutions made by those skilled in the art without departing from the spirit and scope of this utility model are within the protection scope of this utility model.

Claims

1. A combination lock for a lockbox, characterized in that, The system includes a housing (100) for assembling a password assembly (200). The password assembly (200) includes a password wheel (210) and an inner wheel (220) that are linked together, and an unlocking piece (230) that locks and unlocks the password wheel (210) and the inner wheel (220). The housing (100) includes an upper shell (110) that is fitted with the password wheel (210). The upper shell (110) is provided with a limiting hole (111) for the password wheel (210) to move. The upper shell (110) is provided with a code adjustment device (300) that is fitted with the unlocking piece (230) near the limiting hole (111). When the password is correct, the code adjustment device (300) realizes the opening and closing of the code adjustment function by the reciprocating motion of the upper shell (110).

2. A combination lock for a lockbox as described in claim 1, characterized in that, The code-changing device (300) is provided with a guide surface (310) that forces the inner wheel (220) to move and disengage from the code wheel (210). The inner wheel (220) is provided with a guide block (221) that cooperates with the guide surface (310). The code-changing device (300) realizes the code-changing function through reciprocating motion and the cooperation of the guide surface (310) and the guide block (221).

3. A combination lock for a lockbox as described in claim 2, characterized in that, The upper shell (110) is provided with a limiting groove (112) for limiting the reciprocating motion of the coding device (300). The coding device (300) is provided with a push button (320) that cooperates with the limiting groove (112). The coding device (300) realizes the limiting reciprocating motion on the upper shell (110) through the cooperation of the limiting groove (112) and the push button (320).

4. A combination lock for a lockbox as described in claim 3, characterized in that, The unlocking plate (230) is provided with a stop (231) to prevent the code switching device (300) from moving. The code switching device (300) is provided with a protrusion (330) that cooperates with the stop (231). When the password is wrong, the code switching device (300) and the unlocking plate (230) achieve the closing of the code switching function through the cooperation of the stop (231) and the protrusion (330).

5. A combination lock for a lock body as described in claim 4, characterized in that, The housing (100) is provided with an axle (240) for mounting an inner wheel (220). The axial direction of the axle (240) is perpendicular to the movement direction of the code-setting device (300). The unlocking piece (230) is rotatably connected to the housing (100). The inner wheel (220) is provided with a groove (222), and the unlocking piece (230) is provided with a protrusion (232) that matches the groove (222). When the password is correct, the unlocking piece (230) is engaged in the groove (222) through the protrusion (232) to unlock.

6. A combination lock for a lock body as described in claim 5, characterized in that, The unlocking plate (230) is provided with an elastic device (233) that forces the unlocking plate (230) to move toward the inner wheel (220).

7. A combination lock for a lock body as described in claim 5, characterized in that, The password wheel (210) is provided with a groove (211) that works in conjunction with the inner wheel (220). The inner wheel (220) is provided with a protrusion (223) that works in conjunction with the groove (211). The password wheel (210) is sleeved on the outside of the inner wheel (220) and is engaged with the inner wheel (220) by the protrusion (223) being inserted into the groove (211).

8. A combination lock for a lockbox as described in claim 1, characterized in that, The housing (100) includes a lower housing (120) which is fixedly assembled with the upper housing (110). The upper housing (110) and the lower housing (120) are fixedly assembled by means of screws.

9. A combination lock for a lock body as described in claim 8, characterized in that, One end of the unlocking piece (230) is provided with a locking block (234) for locking the lock head, and the side of the lower shell (120) is provided with a locking groove (121) for the lock head to enter and exit. The lock head is locked by passing through the locking groove (121) and by the cooperation of the locking block (234).

10. A combination lock for a lock body as described in any one of claims 1 to 9, characterized in that, The upper shell (110) is provided with several spring arms (113) that are convenient to be snapped onto the carrier.

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