Coded lock stable to assemble

Abstract

The utility model relates to the technical field of coded locks, in particular to a coded lock capable of being assembled stably, which comprises a lock shell, a pushing part capable of being installed on the lock shell in a left-right sliding mode and a code assembly used for limiting movement of the pushing part, the lock shell is provided with two sets of lock hooks, and a transmission module is arranged between the pushing part and the two sets of lock hooks. And the pushing mechanism unlocks the lock hook on the corresponding side through the transmission module. The code assembly comprises a core rod, a plurality of digital wheels and a plurality of code adjusting wheels, and the core rod and the pushing mechanism are fixed and synchronously slide left and right; a stop structure is arranged between the lock shell and the code adjusting wheel so as to limit axial movement of the code adjusting wheel when the code is wrong, displacement of the pushing component, the code adjusting wheel and the core rod is mutually restrained to lock, and the stop structure relieves axial limitation of the code adjusting wheel when the code is correct. Compared with the prior art, under the condition that the two sets of lock hooks are driven to be unlocked based on left-right sliding of the pushing device, the structure is simplified, the manufacturing difficulty and cost are reduced, movement of the code adjusting wheel is limited through the structure of the lock shell in the locking state, the structure is stable, and the safety performance is high.

Description

Technical Field

[0001] This utility model relates to the field of combination lock technology, specifically to a stable combination lock. Background Technology

[0002] Luggage and bags typically contain combination locks. Some use standard combination locks, while others are TSA-certified customs locks that integrate both key and combination lock components for easier customs clearance. A combination lock mainly consists of a cylinder, a dial wheel, a number wheel, and a locking mechanism. The dial wheel is fitted over the cylinder, and the number wheel is fitted over the dial wheel. The main body of the cylinder has a non-circular cross-section, and the dial wheel's hole is also designed to match its shape. However, the section of the cylinder facing the dial wheel in its normal state has a circular cross-section that allows the dial wheel to rotate freely. Under normal conditions, the combination wheel and the dial wheel rotate synchronously. The dial wheel rotates simultaneously with the combination wheel. When the correct combination is reached, the dial wheel's socket aligns perfectly with the core rod's shape, meaning there is no axial interference between them. At this point, the core rod can be moved, unlocking the lock mechanism controlled by the core rod, and the combination lock is in the unlocked state. However, when the combination wheel indicates an incorrect combination, the dial wheel's socket is circumferentially misaligned with the core rod's shape, creating axial interference. In this case, the core rod cannot be moved, locking the lock mechanism, and the combination lock is in the locked state. To reset the combination, in the unlocked state, move the dial wheel to separate it from the combination wheel. The combination wheel can then rotate freely. After rotating the combination wheel to the set combination, release the dial wheel. The dial wheel will move in the opposite direction to reset, re-engage with the combination wheel, and the combination lock is back in normal operation.

[0003] The non-circular cross section between the core rod and the adjustment wheel can also be a concave-convex interlocking structure, that is, the protrusion and the groove are aligned to make room for each other, so that the core rod can move axially relative to the adjustment wheel.

[0004] The combination lock disclosed in Chinese patent document CN208236166U includes a core rod, a dial wheel sleeved on the core rod, a digital wheel sleeved on the dial wheel, a lock mechanism slide controlled by the core rod, a first spring disposed between the core rod and the dial wheel to keep the dial wheel in the locked position, and a second spring to keep the lock mechanism slider in the locked position.

[0005] For example, a mechanical combination lock disclosed in Chinese patent document CN203441211U has a code-changing block, a code-changing wheel, and a return spring sequentially sleeved on the outer side of the wheel axle along the axis. The wheel axle is equipped with a push plate, and the two ends of the return spring abut against the code-changing wheel and the push plate, respectively.

[0006] The above-mentioned combination locks rely on the spring on the outside of the cylinder to limit the code wheel. If the code is wrong, the code wheel and the cylinder are axially fixed and can be regarded as a whole. Therefore, this structure is only suitable for locks that unlock from one side, that is, the lock shell can only have one set of lock hooks. The cylinder moves in one direction to unlock, and cannot lock in the other direction.

[0007] For combination locks with two sets of locking hooks on the lock case, the two sets of locking hooks are located on both sides of the push mechanism. Since the push mechanism connected to the cylinder needs to be moved left and right to unlock (generally, moving in a certain direction will open the corresponding locking hook), the combination components need to limit and lock both sides of the push mechanism. The traditional one-way locking structure through the cylinder and the code wheel is not suitable for this type of lock with two sets of locking hooks.

[0008] For combination locks with two sets of locking hooks, existing technologies often use a lifting plate under the combination wheel to limit the two-way locking, which is a complex and costly structure.

[0009] To address the above issues, the researchers of this application, after proposing an innovative concept, searched and found that Chinese patent application CN118547946A discloses a multi-layer luggage lock with a front and rear push button dual switch. The lock includes an upper lock body, which includes a housing. Inside the housing is a wheel axle for passing through and engaging with the combination wheel for locking. On one side of the wheel axle is a push button for unlocking a first and a second external locking device. When the combination is correct, the push button is pulled backward through the interaction of a linkage and a cooperating wheel to unlock the first external locking device. The push button is pushed forward through the wheel axle to unlock the second external locking device. A linkage is provided inside the lock body that cooperates with the push button. Furthermore, the push button also acts on the wheel axle, thus creating two unlocking methods by pushing the same push button from both the front and rear.

[0010] The existing technology adds a complex structure with a linkage component. When the push button moves toward the first external locking device, the mating wheel disengages from the code wheel through the engagement of the protrusion, thereby unlocking the first external locking device. When the protrusion moves, all the mating wheels (i.e., the code wheel, also known as the inner sleeve) disengage from the code wheel. It can be seen that its transmission method is also relatively complex, the assembly difficulty is high, and the manufacturing cost is increased. Utility Model Content

[0011] In view of the above-mentioned technical problems, the present invention provides a stable combination lock.

[0012] To achieve the above objectives, this utility model provides the following technical solution:

[0013] A stable combination lock is provided, comprising a lock shell, a pusher slidably mounted on the lock shell, and a combination component for restricting the movement of the pusher. The lock shell has two sets of locking hooks, and a transmission module is provided between the pusher and the two sets of locking hooks. During unlocking, when the pusher slides to the left, it drives one set of locking hooks to unlock via the transmission module; when the pusher slides to the right, it drives the other set of locking hooks to unlock via the transmission module. Its characteristic is:

[0014] The password assembly includes a core rod, multiple number wheels, and multiple code adjustment wheels. The core rod is fixed to the pusher and slides synchronously from left to right. The multiple code adjustment wheels are sleeved on the core rod and abut against it in sequence. The multiple number wheels are sleeved on the multiple code adjustment wheels in a corresponding manner. A circumferential limiting structure is provided between the number wheels and the code adjustment wheels so that the number wheels and the code adjustment wheels rotate together. Only after the number wheel rotates to the correct password can the core rod move axially relative to the code adjustment wheel.

[0015] A stop structure is provided between the lock case and the dial wheel to restrict the axial movement of the dial wheel when the password is incorrect. The displacement of the pusher, the dial wheel and the core rod restrain each other to lock. When the password is correct, the stop structure releases the axial restriction of the dial wheel.

[0016] Specifically, the stop structure includes a stop protrusion extending inward from the lock case and a stop groove extending outward from the segment of the dial wheel beyond the digital wheel; when the password is incorrect, the stop protrusion and the stop groove are misaligned, and the stop protrusion axially abuts against the dial wheel for limitation; when the password is correct, the stop groove aligns with the stop protrusion to make way.

[0017] Specifically, the stop protrusion and stop groove are V-shaped.

[0018] Specifically, each adjustment wheel has a stop groove on its outer side, and a plurality of stop protrusions are provided in the lock housing in a corresponding manner.

[0019] Specifically, the stop protrusion is integrally formed into the lock housing.

[0020] Specifically, a return spring is provided on the outside of the core rod. One end of the return spring abuts against the lock housing, and the other end abuts against the dial wheel, so that the dial wheels remain in a state of sequentially abutting against each other and embedded in the digital wheel.

[0021] Specifically, the circumferential limiting structure includes a positioning groove located inside the digital wheel and a positioning tooth located outside the code wheel. The positioning tooth is embedded in the positioning groove, thereby fixing the digital wheel and the code wheel circumferentially and allowing them to rotate together while being axially separated.

[0022] Specifically, the end of the core rod is provided with a first code-changing block and a second code-changing block. The first code-changing block abuts against the code-changing wheel at the very end, and the second code-changing block abuts against the first code-changing block via an inclined surface, and the second code-changing block extends outside the lock case. When the password is correct, external force presses down on the second code-changing block, which can drive the code-changing wheel to move axially in a perpendicular direction, causing the positioning teeth of the code-changing wheel to disengage from the positioning groove of the digital wheel, releasing the circumferential limit, and then rotating the digital wheel to change the code.

[0023] Specifically, the end of the core rod is provided with a locking pin, and the pusher is provided with a locking groove. The locking pin is embedded in the locking groove, thereby fixing the pusher and the core rod together and allowing them to slide synchronously left and right.

[0024] Specifically, the push mechanism includes a lock core, and the bottom of the lock core has an unlocking block. After inserting the correct key, the lock core and the unlocking block can be rotated. The transmission module includes a transmission plate that is slidably installed in the lock case. The transmission plate has a strip-shaped groove, which is arranged perpendicular to the sliding direction of the transmission plate. The unlocking block has a linkage protrusion that is embedded in the strip-shaped groove. The sliding of the transmission plate can drive the lock hook to unlock.

[0025] The beneficial effects of this utility model are:

[0026] This utility model discloses a stable combination lock. Based on the principle that the push mechanism slides left and right to unlock two sets of lock hooks, a stop structure is provided between the lock shell and the dial wheel to restrict the axial movement of the dial wheel when the password is incorrect. The displacement of the push mechanism, the dial wheel, and the core rod restrains each other to lock. When the password is correct, the stop structure releases the axial restriction of the dial wheel, and the core rod and push mechanism can slide to unlock. Compared with the prior art, the structure and transmission method are greatly simplified, reducing manufacturing difficulty and cost. Furthermore, in the locked state, the movement of the dial wheel is restricted by the structure of the lock shell, which indirectly restricts the movement of the push mechanism and the core rod, resulting in a stable structure and high security performance. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a stable combination lock assembly as shown in the embodiment.

[0029] Figure 2 This is an exploded view of a stable combination lock as described in the embodiment.

[0030] Figure 3 This is a cross-sectional view of a stable combination lock assembled according to an embodiment, with some modules hidden.

[0031] Figure 4 for Figure 3A magnified view of the circled area.

[0032] Figure 5 This is a schematic diagram of a portion of the lock housing in the embodiment, mainly illustrating the stop latch protrusion.

[0033] Figure 6 This is a schematic diagram of the internal structure of a stable combination lock as shown in the embodiment.

[0034] Figure 7 This is an exploded view of the cryptographic component in the embodiment.

[0035] Figure 8 This is a cross-sectional view of the cryptographic component in the embodiment.

[0036] Figure label:

[0037] Lock housing 1, stop cam protrusion 11;

[0038] Push 2, Locking slot 21;

[0039] Password assembly 3, core rod 31, lock pin 311, ring groove 312, clearance groove 313, number wheel 32, positioning groove 321, code wheel 33, positioning tooth 331, locking protrusion 332, stop groove 333; first code block 34, second code block 35;

[0040] Lock hook 4;

[0041] Transmission module 5, transmission plate 51, strip groove 511;

[0042] Lock core 6, unlocking block 7, linkage protrusion 71. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0044] This embodiment presents a stable combination lock, such as... Figures 1 to 8As shown, the lock includes a long, narrow lock housing 1, a pusher 2 that can slide left and right on the lock housing 1, and a combination lock assembly 3 for restricting the movement of the pusher 2. Two sets of lock hooks 4 are provided inside the lock housing 1 corresponding to the keyhole position. Each set of lock hooks 4 has two hooks, located on the left and right sides of the pusher 2, respectively. A transmission module 5 is provided between the pusher 2 and the two sets of lock hooks 4. During the combination lock unlocking process, after the correct combination is entered, the combination lock assembly 3 releases the restriction on the lock hooks 4, and external force pushes the pusher 2 to unlock the corresponding lock hooks 4 via the transmission module 5. In practice, the positions of the two sets of lock hooks 4 can be adjusted as needed. As long as the pusher 2 slides to the left to unlock one set of lock hooks 4 and slides to the right to unlock the other set of lock hooks 4, it is within the scope of protection of this application. That is to say, this application is an improvement based on the scenario where the pusher 2 slides left and right to unlock the two sets of lock hooks 4 respectively. The existing rotary knob, single set of lock hooks 4, and unidirectional push knob are not comparable to this application.

[0045] In this embodiment, the password component 3 includes a core rod 31, three number wheels 32, and three code-switching wheels 33. A locking pin 311 is provided at the end of the core rod 31, and a locking groove 21 is provided on the pusher 2. The locking pin 311 is embedded in the locking groove 21, thereby fixing the pusher 2 to the core rod 31 and allowing them to slide synchronously left and right. The three code-switching wheels 33 are fitted around the core rod 31 and abut against it sequentially. The three number wheels 32 are fitted around the three code-switching wheels 33 in a corresponding manner. A circumferential limiting structure is provided between the number wheels 32 and the code-switching wheels 33, allowing them to rotate together. The circumferential limiting structure includes a positioning groove 321 located inside the number wheel 32 and a positioning tooth 331 located outside the code-switching wheel 33. The positioning tooth 331 is axially embedded in the positioning groove 321, thereby fixing the number wheels 32 and the code-switching wheels 33 circumferentially and allowing them to rotate together while being axially separable. The inner side of the dial wheel 33 is provided with a locking protrusion 332, and the outer side of the core rod 31 is provided with an annular groove 312 and a clearance groove 313 arranged along the axial direction. The locking protrusion 332 is embedded in the annular groove 312. Only after the digital wheel 32 turns to the correct code, the locking protrusion 332 aligns with the clearance groove 313, so that the core rod 31 can move axially relative to the dial wheel 33.

[0046] In this embodiment, a stop structure is provided between the lock housing 1 and the dial wheel 33 to restrict the axial movement of the dial wheel 33 when the password is incorrect. The displacement of the pusher 2, the dial wheel 33, and the core rod 31 restrains each other to lock the lock. When the password is correct, the stop structure releases the axial restriction of the dial wheel 33. Specifically, the stop structure includes a stop protrusion 11 extending inward from the lock housing 1 and a stop groove 333 extending outward from the segment of the dial wheel 33 beyond the number wheel 32. When the password is incorrect, the stop protrusion 11 and the stop groove 333 are misaligned, and the stop protrusion 11 axially abuts against the dial wheel 33 to limit its movement. When the password is correct, the stop groove 333 aligns with the stop protrusion 11 to allow it to move. Specifically, the stop protrusion 11 and the stop groove 333 are V-shaped, or similar to a triangle. Of course, they can be changed to other shapes, mainly to allow for misalignment when the password is incorrect and to allow for insertion when the password is correct.

[0047] Specifically, each of the adjustment wheels 33 has a stop groove 333 on its outer side, and a plurality of stop protrusions 11 are provided in the lock housing 1 in a corresponding manner. Specifically, the stop protrusions 11 are integrally formed into the lock housing 1.

[0048] In this embodiment, a return spring (not shown in the figure) is provided on the outer side of the core rod 31. One end of the return spring abuts against the lock housing 1, and the other end abuts against the dial wheel 33, so that the dial wheel 33 is kept in a state of sequentially abutting against each other and embedded in the digital wheel 32.

[0049] Specifically, the end of the core rod 31 is provided with a first code-changing block 34 and a second code-changing block 35. The first code-changing block 34 abuts against the code-changing wheel 33 at the far end, and the second code-changing block 35 abuts against the first code-changing block 34 via an inclined surface, and the second code-changing block 35 extends outside the lock case 1. When the password is correct, external force presses down on the second code-changing block 35, which can drive the code-changing wheel 33 to move axially in a perpendicular direction, causing the positioning teeth 331 of the code-changing wheel 33 to disengage from the positioning groove 321 of the number wheel 32, releasing the circumferential limit, and rotating the number wheel 32 to change the code. After the external force releases the pressing of the second code-changing block 35, the code-changing wheel 33 automatically resets under the action of the return spring.

[0050] In this embodiment, the push mechanism 2 includes a lock core 6, and the bottom of the lock core 6 includes an unlocking block 7. After inserting the correct key, the lock core 6 and the unlocking block 7 can be rotated. The transmission module 5 includes a transmission plate 51 slidably installed inside the lock housing 1. The transmission plate 51 has a strip groove 511, which is arranged perpendicular to the sliding direction of the transmission plate 51. The unlocking block 7 has a linkage protrusion 71 embedded in the strip groove 511. Pushing the push mechanism 2 or rotating the lock core 6 can cause the transmission plate 51 to slide. The sliding of the transmission plate 51 can drive the lock hook 4 to unlock. The cooperation relationship between the transmission plate 51 and the lock hook 4 is prior art and will not be described in detail here.

[0051] It should be noted that in this embodiment, the two sets of locking hooks 4 are unlocked by different transmission plates 51. In practice, they can be changed to the same transmission plate corresponding to the two sets of locking hooks. That is, when the transmission plate slides in one direction, it unlocks one set of locking hooks while keeping the other set of locking hooks locked, and vice versa. This can be achieved by the inclined surface of the transmission plate.

[0052] In the description of this utility model, it is obvious that the described embodiments are only a part of the embodiments of this utility model, and not all of them. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0053] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0054] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0055] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A stable combination lock, comprising a lock housing (1), a pusher (2) slidably mounted on the lock housing (1), and a combination component (3) for restricting the movement of the pusher (2). The lock housing (1) is provided with two sets of locking hooks (4), and a transmission module (5) is provided between the pusher (2) and the two sets of locking hooks (4). During unlocking, the pusher (2) slides to the left, driving one set of locking hooks (4) to unlock via the transmission module (5), and the pusher (2) slides to the right, driving the other set of locking hooks (4) to unlock via the transmission module (5). Its characteristic is: The password component (3) includes a core rod (31), multiple number wheels (32) and multiple code adjustment wheels (33). The core rod (31) is fixed to the pusher (2) and slides synchronously from left to right. Multiple code adjustment wheels (33) are sleeved on the core rod (31) and abut against it in sequence. Multiple number wheels (32) are sleeved on the multiple code adjustment wheels (33) in a corresponding manner. A circumferential limiting structure is provided between the number wheels (32) and the code adjustment wheels (33) so that the number wheels (32) and the code adjustment wheels (33) rotate together. Only after the number wheels (32) rotate to the correct password can the core rod (31) move axially relative to the code adjustment wheels (33). A stop structure is provided between the lock housing (1) and the code wheel (33) to restrict the axial movement of the code wheel (33) when the code is wrong. The displacement of the pusher (2), the code wheel (33) and the core rod (31) restrain each other and lock. When the code is correct, the stop structure releases the axial restriction of the code wheel (33).

2. The stable combination lock according to claim 1, characterized in that: The stop structure includes a stop protrusion (11) extending inward from the lock case (1) and a stop groove (333) extending outward from the segment of the dial wheel (32). When the password is incorrect, the stop protrusion (11) and the stop groove (333) are misaligned, and the stop protrusion (11) axially abuts against the dial wheel (33) to limit its movement. When the password is correct, the stop groove (333) aligns with the stop protrusion (11) to make way.

3. A stable combination lock according to claim 2, characterized in that: The stop protrusion (11) and the stop groove (333) are V-shaped.

4. A stable combination lock according to claim 2, characterized in that: Each adjustment wheel (33) has a stop groove (333) on its outer side, and a plurality of stop protrusions (11) are provided in the lock housing (1) in a corresponding manner.

5. A stable combination lock according to claim 2, characterized in that: The stop protrusion (11) is integrally formed on the lock shell (1).

6. A stable combination lock according to claim 1, characterized in that: A return spring is provided on the outside of the core rod (31). One end of the return spring abuts against the lock housing (1) and the other end abuts against the dial wheel (33), so that the dial wheel (33) remains in a state of sequentially abutting against each other and embedded in the digital wheel (32).

7. A stable combination lock according to claim 6, characterized in that: The circumferential limiting structure includes a positioning groove (321) located inside the digital wheel (32) and a positioning tooth (331) located outside the code wheel (33). The positioning tooth (331) is embedded in the positioning groove (321), so that the digital wheel (32) and the code wheel (33) are fixed together circumferentially and can be separated axially.

8. A stable combination lock according to claim 7, characterized in that: The end of the core rod (31) is provided with a first code-changing block (34) and a second code-changing block (35). The first code-changing block (34) abuts against the code-changing wheel (33) at the far end. The second code-changing block (35) abuts against the first code-changing block (34) via an inclined surface, and the second code-changing block (35) extends to the outside of the lock case (1). When the password is correct, the external force presses down on the second code-changing block (35), which can drive the code-changing wheel (33) to move axially in a perpendicular direction, so that the positioning teeth (331) of the code-changing wheel (33) disengage from the positioning groove (321) of the digital wheel (32), and after the circumferential limit is released, the digital wheel (32) is rotated to change the code.

9. A stable combination lock according to claim 1, characterized in that: The end of the core rod (31) is provided with a locking pin (311), and the pusher (2) is provided with a locking groove (21). The locking pin (311) is embedded in the locking groove (21), thereby fixing the pusher (2) and the core rod (31) together and sliding synchronously left and right.

10. A stable combination lock according to claim 1, characterized in that: The push mechanism (2) is provided with a lock core (6), and the bottom of the lock core (6) is provided with an unlocking block (7). After inserting the correct key, the lock core (6) and the unlocking block (7) can be rotated. The transmission module (5) includes a transmission plate (51) slidably installed in the lock shell (1). The transmission plate (51) has a strip groove (511) arranged along the sliding direction perpendicular to the transmission plate (51). The unlocking block (7) is provided with a linkage protrusion (71) embedded in the strip groove (511). The sliding of the transmission plate (51) can drive the lock hook (4) to unlock.

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