Toolless rekeyable combination lock

Abstract

The utility model relates to a tool -free change code's coded lock, including shell subassembly, the shell subassembly includes the shell body with the installation space in the inside by panel, knob and fixed base are composed, the back of shell subassembly is equipped with the lock piece, and the knob drives the lock piece to rotate, and the lock with the door cabinet is carried out and is locked, the alphabet wheel unit includes a plurality of alphabet wheel groups and the lock bar through the center of alphabet wheel group, the lock bar is provided with the change code block on, can make alphabet wheel group be at change code position to carry out the replacement of password, the inner wall of knob is equipped with the cooperation part with the lock bar two end parts, the cooperation part includes the locking point and change code point of being equipped in the inner wall of knob, the lock bar is at locking point and alphabet wheel unit shows the wrong password, and the lock bar locks the knob, and the knob cannot rotate, the lock bar is located in change code point, and the change code block drives alphabet wheel group, makes alphabet wheel group be at change code state, when this time, the alphabet wheel group can carry out change code to be driven.

Description

Technical Field

[0001] This utility model relates to the field of combination lock technology, and in particular to a combination lock that can be modified without tools. Background Technology

[0002] A combination lock is a type of lock that uses a series of numbers or symbols to open. Combination locks can be divided into mechanical combination locks, numeric combination locks, and so on.

[0003] The combination lock's code is usually just a sequence rather than a true combination. Some combination locks use only a single dial to rotate several discs or cams inside the lock; others use a set of several numbered dials to directly drive the internal mechanism.

[0004] To ensure personal privacy and property security, people usually lock their suitcases or cabinets at home. To increase the complexity of unlocking, mechanical combination locks are usually used, which use combination wheels to lock the mechanical lock, thereby increasing the difficulty of unlocking and ensuring its security.

[0005] Existing combination locks are not simple or reliable enough for changing the password. Furthermore, because combination locks have many internal parts, the dial can get stuck when trying to change the password, making it impossible to do so. Additionally, current combination locks typically require tools for changing the password, which is inconvenient. Utility Model Content

[0006] To address the aforementioned problems in the existing technology, this utility model provides a tool-free combination lock that can be modified.

[0007] The above-mentioned problems of this utility model are solved by the following technical solution:

[0008] A tool-free combination lock, comprising:

[0009] The housing assembly includes a housing with an internal mounting space, consisting of a panel, a knob, and a mounting base; a locking plate is provided on the back of the housing assembly, and the knob drives the locking plate to rotate, locking it with the door cabinet;

[0010] The character wheel unit includes multiple character wheel groups and a locking rod passing through the center of the character wheel groups; the locking rod is provided with a code-changing block, which enables the character wheel group to be in the code-changing position for changing the code;

[0011] The inner wall of the knob is provided with mating parts corresponding to the two ends of the locking rod;

[0012] The mating parts include a locking point and a code-changing point located on the inner wall of the knob;

[0013] When the locking lever is in the locking position and the character wheel unit displays an incorrect password, the locking lever locks the knob, and the knob cannot be turned.

[0014] When the locking lever is located at the code-changing point, the code-changing block drives the character wheel group, putting the character wheel group into the code-changing state. At this time, the code can be changed by moving the character wheel group.

[0015] A further provision of the above technical solution is that: the first end of the locking rod is provided with a locking tongue, which is used to cooperate with the locking point on the knob to lock the knob;

[0016] The code-changing block is located at the second end of the locking lever opposite to the first end, and cooperates with the code-changing point on the knob to drive the character wheel group.

[0017] A further setting of the above technical solution is: the character wheel assembly includes a character wheel core and a character wheel sleeved on the character wheel core and capable of driving the character wheel core to rotate or rotate relative to it; the character wheel and the character wheel core are connected by a matching point and a matching groove.

[0018] The code-changing block is located on the side of the character wheel core and is used to push the character wheel core so that the code-matching point exits from the code-matching slot.

[0019] A further configuration of the above technical solution is as follows: the locking point is a recess on the inner wall of the knob, the code changing point is a top holding protrusion on the inner wall of the knob, and the top holding protrusion and the inner wall of the knob are connected by a guide surface.

[0020] A further provision of the above technical solution is that a stop surface is provided on the side of the code-changing point opposite to the guide surface.

[0021] A further provision of the above technical solution is that the first end of the locking rod is also provided with a reset member, which holds the character wheel core and drives the character wheel core to move toward the code-changing block.

[0022] A further provision of the above technical solution is that an anti-rotation component is also connected to the code-changing block, and the anti-rotation component is connected to the end face of the code-changing block through an anti-rotation surface to prevent the code-changing block from rotating.

[0023] A further provision of the above technical solution is that the anti-rotation surface is a helical surface provided on the axial end face of the anti-rotation component, and the code block is provided with a mating surface corresponding to the anti-rotation surface.

[0024] A further provision of the above technical solution is that: a limiting block is provided on the anti-rotation component, and the limiting block is limited within the limiting groove inside the fixed base.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] 1. With the locking and code-changing points designed on the inner wall of the knob, the position of the locking lever can be switched by turning the knob, and the code can be changed without the need for external tools, simplifying the traditional code-changing process;

[0027] 2. The drive coordination between the code-changing block and the character wheel group, the automatic reset function of the reset component, and the limit design of the anti-rotation component on the code-changing block reduce the risk of component jamming or misalignment during the code-changing process and improve the stability of code-changing.

[0028] 3. The knob locking function in the wrong password state ensures security, while the independent drive design of the character wheel group in the password change state ensures the flexibility of password modification and avoids password invalidation due to accidental operation;

[0029] 4. By integrating the locking lever and the knob, the complex transmission components of traditional combination locks are reduced, thus lowering assembly difficulty and failure rate. Attached Figure Description

[0030] Figure 1 This is an exploded structural diagram of the present invention.

[0031] Figure 2 This is a schematic diagram of the locking lever at the locking position.

[0032] Figure 3 This is a schematic diagram of the lock lever at the code-changing point.

[0033] Figure 4 This is a schematic diagram of the exploded structure of a character wheel unit.

[0034] Figure 5 This is a schematic diagram of the knob.

[0035] Figure 6 This is a schematic diagram of the front structure of the knob.

[0036] Figure 7 for Figure 5 Enlarged structural diagram of part A in the middle.

[0037] Figure 8 This is a schematic diagram of the separate structure of the code-changing block and the anti-rotation component.

[0038] The attached diagram is labeled: 100, panel; 101, character wheel groove;

[0039] 200. Fixture;

[0040] 300. Knob; 301. Locking point; 302. Code change point; 303. Guide surface; 304. Relief groove; 302.1. Stop surface;

[0041] 1. Locking plate; 2. Reset component;

[0042] 400, Character wheel unit; 410, Character wheel; 411, Matching slot; 420, Character wheel core; 421, Matching point; 430, Locking rod; 431, Baffle; 440, Locking tongue;

[0043] 500, Modified code block; 501, Mating surface;

[0044] 600, anti-rotation component; 610, anti-rotation block; 611, anti-rotation surface; 620, limit block. Detailed Implementation

[0045] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0046] like Figure 1-8 As shown in the figure, this embodiment discloses a combination lock that can be modified without tools.

[0047] A tool-free combination lock, comprising:

[0048] The housing assembly includes a housing with an internal installation space, consisting of a panel 100, a knob 300, and a mounting base 200; a locking plate 1 is provided on the back of the housing assembly, and the knob 300 drives the locking plate 1 to rotate and lock it with the door cabinet;

[0049] The character wheel unit 400 includes multiple character wheel groups and a locking rod 430 passing through the center of the character wheel groups; the locking rod 430 is provided with a code-changing block 500, which enables the character wheel group to be in the code-changing position for changing the code;

[0050] The inner wall of the knob 300 is provided with mating parts corresponding to the two ends of the locking rod 430;

[0051] The mating parts include a locking point 301 and a code-changing point 302 provided on the inner wall of the knob 300;

[0052] When the locking lever 430 is at the locking position 301 and the character wheel unit 400 displays an incorrect password, the locking lever 430 locks the knob 300, and the knob 300 cannot be rotated;

[0053] When the locking lever 430 is located at the code-changing point 302, the code-changing block 500 drives the character wheel group, putting the character wheel group into the code-changing state. At this time, the code can be changed by moving the character wheel group.

[0054] The above is the basic scheme of this embodiment.

[0055] Specific reference Figure 1As shown, the mounting base 200 and the panel 100 are combined to form an inner shell with an installation space. The knob 300 is rotatably mounted on the circumference of the mounting base 200. The back of the knob 300 is connected to the locking plate 1. Rotating the knob 300 drives the locking plate 1 to rotate, thereby unlocking and locking the external door lock.

[0056] The character wheel unit 400 is located inside the inner shell, and the two ends of the locking rod 430 can extend out of the fixing base 200 through two opposing clearance holes to lock the knob 300 or change the position of the character wheel assembly. The panel 100 is provided with a character wheel 410 groove 101 that allows part of the character wheel 410 to extend.

[0057] Reference Figure 2 As shown, when the latch 440 is at the locking point 301 and the dial 410 is in the wrong combination, the knob 300 cannot be turned, and therefore cannot drive the blade to unlock.

[0058] When the bolt 440 is in the locking position 301 and the dial 410 is rotated to the correct combination, the knob 300 is turned. At this time, the knob 300 can drive the end of the lock bar 430 out of the locking position 301 and drive the lock plate 1 to unlock.

[0059] Reference Figure 3 As shown, when the character wheel unit 400 is unlocked, the knob 300 is rotated so that the locking lever 430 is in the code-changing position 302. At this time, the character wheel group is in the code-changing position, and the user can change the password of the character wheel unit 400.

[0060] The knob 300 and the panel 100 are respectively provided with indicator marks that can mark the relative positions of the two.

[0061] It should be noted that in this embodiment, the knob 300 can only be rotated in one direction. That is, the latch 440 needs to be moved into the locking position 301 to unlock the character wheel unit 400 before it can be rotated to the code-changing position 302 to change the code.

[0062] Preferably, in this embodiment, the first end of the locking rod 430 is provided with a locking tongue 440, which is used to cooperate with the locking point 301 on the knob 300 to lock the knob 300;

[0063] The code-changing block 500 is located at the second end of the locking rod 430 opposite to the first end, and cooperates with the code-changing point 302 on the knob 300 to drive the character wheel group.

[0064] In this embodiment, locking the knob 300 and changing the code of the character wheel unit 400 are both accomplished by moving the locking lever 430, without the need for external tools or other components, thus achieving tool-free code changing operation.

[0065] Specific reference Figure 4 As shown, the character wheel assembly includes a character wheel core 420 and a character wheel 410 sleeved on the character wheel core 420 and capable of driving the character wheel core 420 to rotate or rotate relative to it. The character wheel 410 and the character wheel core 420 are connected by a matching point 421 and a matching groove 411.

[0066] The code-changing block 500 is located on the side of the character wheel core 420 and is used to push the character wheel core 420 so that the code-matching point 421 exits from the code-matching slot 411.

[0067] In this embodiment, the locking and unlocking methods of the character wheel core 420 and the character wheel 410 are consistent with those of the prior art character wheel assembly, and will not be described in detail here.

[0068] In this embodiment, the code-changing block 500 is located at the end of the locking lever 430. When the knob 300 is rotated to the code-changing point 302, the code-changing point 302 pushes the code-changing block 500 at the end of the locking lever 430, causing the code-changing block 500 to move toward the lock tongue 440. During the movement, the code-changing block 500 pushes the character wheel core 420, thereby pushing the character wheel core 420 out of the character wheel 410 and causing the code-matching point 421 to exit from the code-matching slot 411. At this time, rotating the character wheel 410 does not move the character wheel core 420, thus enabling the code to be changed.

[0069] In this embodiment, the code slots 411 are recessed in the inner ring of the character wheel 410, and their number is consistent with the number on the character wheel 410. The code points 421 are protrusions set on the outer periphery of the character wheel core 420.

[0070] To ensure that the code-changing block 500 only drives the character wheel core 420, in this embodiment, the outer diameter of the code-changing block 500 is not greater than the outer diameter of the character wheel core 420.

[0071] In order to lock the knob 300 with the locking lever 430 and drive the character wheel group with the code change block 500, in this embodiment, the locking point 301 is a recess on the inner wall of the knob 300, and the code change point 302 is a top holding protrusion on the inner wall of the knob 300. The top holding protrusion and the inner wall of the knob 300 are connected by a guide surface 303.

[0072] When the knob 300 is turned to the locking position 301, the locking tongue 440 at the first end of the locking bar 430 enters the groove, and the entire locking bar 430 moves toward the locking tongue 440. In the case of incorrect password, the locking bar 430 cannot retract into the fixed seat 200 by itself, thus it cannot unlock the knob 300.

[0073] When the knob 300 is rotated to the code-changing point 302, the supporting protrusion supports the code-changing block 500 at the second end of the locking lever 430, causing the code-changing block 500 to move toward the locking tongue 440, which in turn pushes the character wheel core 420 to move toward the locking tongue 440, thus separating the character wheel 410 and the character wheel core 420.

[0074] In this embodiment, please refer to the specific details. Figure 5 As shown, in this embodiment, the top support protrusion and the inner wall of the knob 300 are transitionally connected by a guide surface 303, which is a sloped or arc-shaped surface connecting the top support protrusion and the inner wall of the knob 300. During the rotation of the knob 300, the end of the code-changing block 500 first slides along the inner wall of the knob 300, at which time the locking lever 430 does not move within the fixed seat 200. Until it slides to the slope, it climbs along the slope. During the climbing process, the code-changing block 500 is displaced in the axial direction, and at the same time pushes the character wheel core 420 until it climbs to the top, that is, the code-changing block 500 reaches the position of the top support protrusion, completely pushing the code-matching point 421 on the character wheel core 420 out of the code-matching groove 411 of the character wheel 410. The locking of the character wheel 410 and the character wheel core 420 is invalidated, and the user can turn the character wheel 410 to change the code.

[0075] In addition, during the movement of the code-changing block 500, it causes the locking lever 430 to undergo a small or uniform displacement, causing the locking tongue 440 at the first end of the locking lever 430 to extend to the other side of the fixed base 200. Therefore, a clearance groove 304 is provided on the inner wall of the knob 300 on the side opposite to the code-changing point 302, as detailed in the following reference. Figure 6 As shown.

[0076] In this embodiment, a stop surface 302.1 is provided on the side of the code-changing point 302 opposite to the inclined surface.

[0077] Specific reference Figure 7 As shown, when the user operates the knob 300 to rotate it to the code-changing point 302, in order to avoid over-rotation, a stop surface 302.1 is provided on the code-changing point 302. The stop surface 302.1 is located on the other side of the code-changing point 302 and is set at almost right angle to the end face of the code-changing point 302. This causes the code-changing block 500 to climb to the code-changing point 302 and form a stop, preventing it from climbing further. Therefore, the knob 300 cannot be rotated further.

[0078] To reduce friction generated by the code-changing block 500 during its movement relative to the knob 300, the end of the code-changing block 500 is set as an arc-shaped surface in this embodiment.

[0079] After the code is changed, the knob 300 is turned back. At this time, the character wheel core 420 needs to be reset so that the character wheel core 420 and the character wheel 410 are locked again. In this embodiment, the first end of the locking rod 430 is also provided with a reset member 2. The reset member 2 supports the character wheel core 420 and drives the character wheel core 420 to move toward the code changing block 500.

[0080] Specific reference Figure 4 As shown, the reset component 2 is a reset spring and is sleeved on the head of the locking rod 430. The head of the locking rod 430 is provided with a baffle 431. One end of the reset component 2 holds the baffle 431, and the other end holds the character wheel core 420 at the head.

[0081] When the pushing force on the code-changing block 500 is removed, the reset component 2 pushes the character wheel core 420 toward the side of the code-changing block 500, so that the code-matching point 421 re-enters the code-matching groove 411, locking the character wheel 410 and the character wheel core 420.

[0082] In this embodiment, to avoid the friction generated on the code-changing block 500 during the rotation of the knob 300, which would cause the code-changing block 500 to rotate and generate noise, an anti-rotation member 600 is also connected to the code-changing block 500. The anti-rotation member 600 is connected to the end face of the code-changing block 500 through the anti-rotation surface 611 to prevent the code-changing block 500 from rotating.

[0083] Specific reference Figure 8 As shown, the anti-rotation component 600 is a ring-shaped assembly, which is sleeved on the locking rod 430 and located between the character wheel core 420 and the code-changing block 500. It can be driven by the character wheel core 420 or the code-changing block 500 and slide along the locking rod 430.

[0084] The anti-rotation surface 611 is provided on the end face of the anti-rotation member 600 facing the code change block 500. The anti-rotation surface 611 contacts and cooperates with the end face of the code change block 500 to prevent it from rotating around the axis, and can only slide along the axis.

[0085] Preferably, in this embodiment, the anti-rotation surface 611 is a spiral surface provided on the axial end face of the anti-rotation member 600, and the code block 500 is provided with a mating surface 501 corresponding to the anti-rotation surface 611.

[0086] Specific reference Figure 8As shown, an anti-rotation block 610 extends from the rear end face of the anti-rotation component 600. The outer wall of the anti-rotation block 610 is consistent with that of the anti-rotation component 600. The anti-rotation block 610 has at least one helical surface on its end face in the circumferential direction, which is the anti-rotation surface 611. At the same time, the end of the code block 500 is provided with a mating surface 501 corresponding to the anti-rotation surface 611 on the anti-rotation component 600. The anti-rotation surface 611 and the mating surface 501 are tightly spliced ​​together to form a complete annular outer surface.

[0087] In this embodiment, multiple anti-rotation blocks 610 are provided, and a splicing groove is formed between two adjacent anti-rotation blocks 610. In order to ensure the axial pushing force between the code change block 500 and the anti-rotation member 600, in this embodiment, the end of the code change block 500 is set as a protrusion structure that cooperates with the splicing groove between the anti-rotation blocks 610 of the anti-rotation member 600. That is, the code change block 500 and the anti-rotation member 600 can be spliced ​​together to form a complete sleeve structure.

[0088] The anti-rotation of the anti-rotation component 600 itself is achieved by the limiting block 620. Specifically, the limiting block 620 extends from the end face of the anti-rotation component 600 toward the fixed base 200. The fixed base 200 is formed with a limiting groove that cooperates with the limiting block 620, and the limiting groove is set to be open on the side facing the lock tongue 440. The rotation of the limiting block 620 is constrained by the limiting groove. When the code block 500 drives the anti-rotation component 600 to slide on the lock rod 430, the limiting block 620 can slide out of the limiting groove a certain distance through the opening, but the limiting block 620 is not completely pushed out of the limiting groove.

[0089] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tool-free combination lock, comprising: The housing assembly includes a housing with an internal installation space consisting of a panel (100), a knob (300) and a mounting base (200); the back of the housing assembly is provided with a locking plate (1), and the knob (300) drives the locking plate (1) to rotate and lock it with the door cabinet; The character wheel unit (400) includes multiple character wheel groups and a locking rod (430) passing through the center of the character wheel group; the locking rod (430) is provided with a code-changing block (500), which enables the character wheel group to be in the code-changing position for changing the code; The inner wall of the knob (300) is provided with mating parts corresponding to the two ends of the locking rod (430); Its features are: The mating parts include a locking point (301) and a code-changing point (302) provided on the inner wall of the knob (300); When the locking lever (430) is in the locking position (301) and the character wheel unit (400) displays an incorrect password, the locking lever (430) locks the knob (300), and the knob (300) cannot be rotated; When the locking lever (430) is located at the code-changing point (302), the code-changing block (500) drives the character wheel group to put the character wheel group into the code-changing state. At this time, the character wheel group can be moved to change the code.

2. The tool-free code-changing combination lock according to claim 1, characterized in that: The first end of the locking rod (430) is provided with a locking tongue (440), which is used to cooperate with the locking point (301) on the knob (300) to lock the knob (300); The code-changing block (500) is located on the second end of the locking rod (430) opposite to the first end, and cooperates with the code-changing point (302) on the knob (300) to drive the character wheel group.

3. The tool-free code-changing combination lock according to claim 2, characterized in that: The character wheel assembly includes a character wheel core (420) and a character wheel (410) sleeved on the character wheel core (420) and capable of driving the character wheel core (420) to rotate or rotate relative to it. The character wheel (410) and the character wheel core (420) are connected by a matching point (421) and a matching groove (411). The code-changing block (500) is located on the side of the character wheel core (420) and is used to push the character wheel core (420) so that the code point (421) exits from the code slot (411).

4. The tool-free code-changing combination lock according to claim 3, characterized in that: The locking point (301) is a recess on the inner wall of the knob (300), and the code changing point (302) is a top holding protrusion on the inner wall of the knob (300). The top holding protrusion and the inner wall of the knob (300) are connected by a guide surface (303).

5. The tool-free code-changing combination lock according to claim 4, characterized in that: A stop surface (302.1) is provided on the side of the code-changing point (302) opposite to the guide surface (303).

6. The tool-free combination lock according to claim 1, characterized in that: The first end of the locking rod (430) is also provided with a reset member (2), which holds the character wheel core (420) and drives the character wheel core (420) to move toward the side of the code block (500).

7. The tool-free combination lock according to claim 1, characterized in that: The code-changing block (500) is also connected to an anti-rotation component (600), which is connected to the end face of the code-changing block (500) through an anti-rotation surface (611) to prevent the code-changing block (500) from rotating.

8. The tool-free combination lock according to claim 7, characterized in that: The anti-rotation surface (611) is a spiral surface provided on the axial end face of the anti-rotation member (600), and the code block (500) is provided with a mating surface (501) corresponding to the anti-rotation surface (611).

9. The tool-free combination lock according to claim 7 or 8, characterized in that: The anti-rotation component (600) is provided with a limiting block (620), which is limited in the limiting groove inside the fixed base (200).

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