Mechanical coded lock compact in structure and convenient to assemble

Abstract

A mechanical coded lock compact in structure and convenient to assemble comprises a shell, a rotary knob, a lock cylinder and a code wheel assembly. The knob is arranged on the shell in a penetrating manner, the front end of the knob is exposed out of the front side of the shell, the rear end of the knob is exposed out of the rear side of the shell, and the rear end of the knob is further connected with a lock plate capable of rotating along with the knob; the lock cylinder is arranged in the shell, and the front end, provided with a lock hole, of the lock cylinder is exposed out of the front side of the shell. The password wheel assembly is arranged in the shell and comprises a plurality of character wheels capable of rotating relative to the shell, and the character wheels are exposed out of the front side of the shell; the coded lock further comprises a multifunctional support, the multifunctional support is arranged in the shell, the knob base and the lock cylinder base are integrally formed on the multifunctional support, multiple functions are achieved through one part, the inner space of the coded lock is effectively saved, the size of the coded lock is reduced, the production cost can be effectively saved, and the assembling difficulty of the coded lock can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of password locks, in particular to a mechanical password lock which has a compact structure and is easy to assemble. Background Art

[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 and electronic combination locks. Mechanical combination locks generally rely on turning a combination wheel to enter the password, while electronic combination locks use buttons or touch screens to enter the password.

[0003] In addition to the indispensable combination wheel assembly, the structure of the existing mechanical combination locks on the market is also provided with a knob for unlocking and a lock core for starting the code-finding mode. There are a variety of settings for the knob and the lock core in the existing mechanical combination locks, which mainly include two types of settings. One of them is to insert the lock core into the knob so that the two are integrated, which can effectively save space in the mechanical combination lock, making the combination lock more compact as a whole.

[0004] For example, the Chinese patent application with patent number ZL 201910408884.7 discloses: "A high-strength anti-theft password lock, comprising a password lock, a key lock and a knob, the key lock comprising a lock core and a lock tongue plate arranged on the knob and used to lock or unlock the rotation state of the knob, the password lock comprising a password wheel and an end password wheel, grooves are provided between adjacent numbers of the password wheel, and a locking mechanism for limiting the rotation of the password wheel is also provided in the shell, the locking mechanism comprises a first inclined block, a limit block and a support plate, one end of the first inclined block abuts against the groove, and the other end of the inclined surface is oppositely provided with a second inclined block, and the second inclined block is provided with a plurality of first sliding blocks that can move vertically relative to it; the structure of the present invention is simple, and through the ingenious locking mechanism, an uninformed outsider cannot unlock the lock even if he knows the password."

[0005] Different from the solution described in the above patent, there is another type of mechanical combination lock on the market, on which the knob and lock core are separately arranged. The advantage of this type of combination lock compared to the combination lock described in the above patent is that the separate arrangement of the knob and lock core enables the operator to see the functions of each component at a glance, so that the operator will not be unable to operate the lock during the unlocking process.

[0006] However, there is also a problem with the mechanical combination lock in which the knob and the lock core are separately arranged. That is, since the knob and the lock core are separately arranged, two mounting seats are required to be arranged in the housing of the combination lock to support both of them. This will not only increase the size of the combination lock because a large amount of space in the housing is occupied, but also because the two mounting seats need to be separately processed and installed, which will not only increase the production cost but also make the assembly of the combination lock too complicated. Summary of the invention

[0007] In order to overcome the shortcomings of the mechanical combination lock in the prior art in which the knob and the lock core are independently arranged, such as being too large in size and complicated in assembly, the utility model provides a mechanical combination lock with a compact structure and convenient assembly.

[0008] The technical solution of the utility model to solve the technical problem is: a mechanical password lock with compact structure and convenient assembly, including:

[0009] case;

[0010] A knob is disposed on the housing, the front end of the knob is exposed at the front side of the housing, the rear end of the knob is exposed at the rear side of the housing, and the rear end of the knob is also connected to a lock plate that can rotate with the knob;

[0011] A lock core is disposed in the housing, and a front end of the lock core having a lock hole is exposed at the front side of the housing;

[0012] A cipher wheel assembly is disposed in the housing, the cipher wheel assembly includes a plurality of character wheels rotatable relative to the housing, and the character wheels are exposed at the front side of the housing;

[0013] Also included are:

[0014] A multifunctional bracket is arranged in the housing, and a knob seat and a lock core seat are integrally formed on the multifunctional bracket;

[0015] The knob seat includes a knob hole that penetrates and is opened on the multifunctional bracket, and the knob is inserted into the knob hole to realize a rotatable connection with the housing;

[0016] The lock core seat includes a lock core hole which is through-opened on the multifunctional bracket, and the lock core is penetrated in the lock core hole to realize a rotatable connection with the shell.

[0017] The multifunctional bracket is further provided with a spring-shift stop structure for the rotation of the character wheel. The multifunctional bracket is also integrally formed with a plurality of gear pawls, the gear pawls are provided with a protrusion protruding toward the cipher wheel assembly, the character wheel of the cipher wheel assembly is provided with a plurality of grooves around its circumference, the protrusions can be snap-fitted in the grooves to realize the spring-shift stop during the rotation of the character wheel.

[0018] The setting structure of the gear pawl on the multifunctional bracket is further that the multifunctional bracket is protrudingly provided with a support rib, the support rib is located on the side of the multifunctional bracket close to the password wheel assembly, the gear pawl is located on the upper side of the support rib, the gear pawl can swing relative to the support rib through deformation, and the swing of the gear pawl can drive the protrusion on it to move away from or close to the code wheel.

[0019] The setting position of the gear pawl on the multifunctional bracket is further arranged such that the upper part of the supporting rib is located between the gear pawl and the side surface of the multifunctional bracket, and a swing gap is also arranged for the gear pawl to swing.

[0020] The gear pawl further causes the rotation of the character wheel to stop. When the operator turns the character wheel to make it rotate, the side of the character wheel will act on the push block to deform the gear pawl, thereby causing the protrusion to move away from the character wheel and withdraw from the current groove. When the turning of the character wheel stops, the gear pawl will elastically recover and drive the protrusion to re-engage in another groove.

[0021] The structure in the shell for limiting the swing of the gear pawl and the rotation of the knob is further provided with a locking plate in the shell, and the locking plate includes a driving part and a driven part. The driving part extends into the swing gap and abuts against the rear side of the gear pawl, and the driven part extends into the knob hole. The outer side of the knob is also provided with an avoidance groove that can form a snap-fit ​​with the driven part. When the gear pawl swings toward the swing gap, it can push the driving part to move, so that the driven part has a movement tendency to approach the knob.

[0022] The locking plate further acts on the gear pawl and the knob. When the character wheel is turned, the gear pawl is deformed and swings toward the swing gap, so the gear pawl will drag the locking plate and make the driven part of the locking plate plug into the avoidance groove of the knob. At this time, even if the knob is operated, it cannot be rotated; when the knob is rotated, the avoidance groove on the knob is staggered with the driven part of the locking plate. Therefore, when the locking plate has a movement tendency, the driven part will abut and fit against the side wall of the knob, making the locking plate unable to move. Therefore, even if the character wheel is turned at this time, the gear pawl cannot be deformed because the locking plate cannot move, thereby making the character wheel unable to rotate.

[0023] The specific structure of the cipher wheel assembly is further that the cipher wheel assembly also includes a core shaft inserted into the shell and a plurality of coupling wheels sleeved on the core shaft, the character wheel is also sleeved on the core shaft, a plurality of coupling blocks are convexly provided on the circumference of the coupling wheel, a plurality of coupling grooves are opened on the inner side of the character wheel, and the transmission connection between the character wheel and the coupling wheel is realized by the snap-fitting of the coupling blocks with the coupling grooves.

[0024] The structure for driving the coupling wheel to be separated from the character wheel is further, the core shaft is movably arranged relative to the character wheel, and one end of the core shaft is convexly provided with a pushing block, the outer side of the pushing block is exposed to one side of the shell, and the inner side of the pushing block is in contact with the coupling wheel. When the core shaft moves relative to the character wheel, it can push the coupling wheel to move relative to the character wheel to release the transmission connection between the character wheel and the coupling wheel.

[0025] The structure in the shell for driving the core shaft and the coupling wheel to reset is further, and a reset plate can be movably arranged in the shell, and an extension column is protruding on the reset plate toward the character wheel assembly, and a connecting groove is opened on the lower side of the extension column. The other end of the core shaft is also exposed on one side of the shell, and the side wall of the core shaft at this end forms a snap fit with the connecting groove, so that a transmission connection is formed between the core shaft and the reset plate, and the extension column is abutted against the coupling wheel. The reset plate can push the core shaft and the coupling wheel to move, so that the transmission connection between the character wheel and the coupling wheel is restored.

[0026] The structure in the shell for limiting the movement of the drive plate is further that a locking rod is rotatably arranged in the shell, a locking hole is provided on the reset plate, the top of the locking rod is inserted into the locking hole, a switching block is also provided at the bottom of the locking rod, the switching block is exposed at the rear side of the shell, a password setting recess is also provided at the top of the locking rod, an abutment edge is provided on the inner side of the locking hole, and the rotation of the locking rod can align or stagger the password setting recess relative to the abutment edge.

[0027] The process of separating the character wheel from the coupling wheel goes a step further. When the password of the combination lock needs to be set, the transmission connection between the character wheel and the coupling wheel needs to be released. First, the switching block located at the rear side of the shell is rotated to rotate the locking rod and align the password setting recess on its top with the abutting edge of the locking hole. Then, the pushing block exposed on one side of the shell can be pushed to move the pushing block toward the shell. The pushing block will drive the core shaft and the coupling wheel to move relative to the character wheel, thereby releasing the transmission connection between the character wheel and the coupling wheel. At the same time, the movement of the core shaft drives the reset plate to move accordingly, so that the abutting edge of the locking hole is matched with the password setting recess. If the switching block is not rotated to align the password setting recess with the abutting edge, even if the pushing block is pushed, the abutting edge will interfere with the side of the locking rod, resulting in the reset plate being unable to move, and thus the core shaft and the coupling wheel are also unable to move.

[0028] The process of restoring the connection between the character wheel and the coupling wheel is further advanced. When the password is reset, the end of the core shaft exposed on one side of the shell can be pushed to make the core shaft move relative to the character wheel. The movement of the core shaft will drive the reset plate connected to it to move accordingly, and the reset plate will push the coupling wheel to move, so that the coupling wheel and the character wheel will form a transmission connection again, and with the movement of the reset plate, the abutting edge of the locking hole will also withdraw from the password setting recess, and then the switching block is rotated to drive the locking rod to rotate, so that the password setting recess and the abutting edge are staggered, and the reset operation after the password is reset is completed.

[0029] The structure on the multifunctional bracket for achieving a spring-stop pause when the knob is rotated is further, and the knob seat also includes a spring-stop plate, which is protrudingly arranged on one side below the knob hole, and a spring-stop block is protruding on the spring-stop plate toward the knob, and a spring-stop protrusion is protruding on the side wall of the knob, and the spring-stop protrusion abuts against the spring-stop block to form an interference fit, and when the knob is rotated, the spring-stop protrusion can push the spring-stop block to cause the spring-stop plate to deform.

[0030] The specific assembly process of the utility model is as follows: when assembling the combination lock, the lock core and the knob can be pre-assembled on the multi-functional bracket first, during which the locking plate and the reset plate can also be pre-connected to the multi-functional bracket, and then the entire multi-functional bracket is assembled into the shell, and finally after the combination wheel assembly is also assembled into the shell, the assembly of the entire combination lock can be completed.

[0031] The beneficial effects of the utility model are:

[0032] 1. A multifunctional bracket is provided, and a lock core seat, a knob seat and a gear pawl are integrally formed on the multifunctional bracket, so that multiple functions are realized with one component, which not only effectively saves the space inside the password lock and reduces the volume of the password lock, but also effectively saves production costs and reduces the difficulty of assembling the password lock;

[0033] 2. The multifunctional bracket is also connected with structures such as a limit plate and a reset plate. The limit plate can be used to limit the rotation of the knob, and the reset plate can be used to drive the coupling wheel to reset and reconnect with the character wheel, so that the use of the multifunctional bracket is further expanded. In addition, since the limit plate and the reset plate are tightly connected to the multifunctional bracket, almost no other space in the password lock is occupied, making the password lock structure more compact;

[0034] 3. A spring plate is protruding from the multifunctional bracket to stop the knob when it is turned, which can hinder the rotation of the knob, thereby preventing the knob from automatically rotating and causing the lock to open when the combination lock is impacted, thereby ensuring the stability of the combination lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a front structural schematic diagram of the utility model.

[0036] Figure 2 It is a schematic diagram of the back structure of the utility model.

[0037] Figure 3 It is an explosion schematic diagram of the utility model.

[0038] Figure 4 It is a schematic diagram of the cooperation between the multifunctional bracket and the character wheel in the utility model.

[0039] Figure 5 It is a schematic diagram of the cooperation between the multifunctional bracket and the locking plate in the utility model.

[0040] Figure 6 It is a schematic diagram of the cooperation between the locking plate and the knob in the utility model.

[0041] Figure 7 It is a schematic diagram of the disassembly of the central shaft, the character wheel and the coupling wheel of the utility model.

[0042] Figure 8 It is a schematic diagram of the cooperation between the password wheel assembly and the reset plate in the utility model.

[0043] Fig. 9 It is a schematic diagram of the cooperation between the multifunctional bracket and the reset plate in the utility model.

[0044] Fig.10 It is a structural schematic diagram of the locking rod in the utility model.

[0045] Fig.11 It is a schematic diagram of the cooperation between the multifunctional bracket and the knob in the utility model.

[0046] Numbers in the figure: 1, housing; 2, knob; 3, lock plate; 4, lock core; 5, password wheel assembly; 6, character wheel; 7, multi-function bracket; 8, knob seat; 9, lock core seat; 10, knob hole; 11, lock core hole; 12, gear pawl; 13, bump; 14, groove; 15, support rib; 16, swing gap; 17, locking plate; 18, driving part; 19, driven part; 20, avoidance groove; 21, Core shaft; 22, coupling wheel; 23, coupling block; 24, coupling groove; 25, pushing block; 26, reset plate; 27, extension column; 28, connecting groove; 29, locking rod; 30, locking hole; 31, switching block; 32, password setting recess; 33, abutting edge; 34, spring plate; 35, spring block; 36, spring protrusion; 37, rear shell; 38, front cover; 39, guide groove; 40, guide rib. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] It should be understood that although the terms upper, middle, lower, top, end, etc. appear in this article to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for easy understanding, and are not used to define any direction or order limitation.

[0049] Example

[0050] Combination Figures 1 to 11 A mechanical combination lock with a compact structure and convenient assembly is shown, comprising a housing 1, a knob 2, a lock core 4 and a combination wheel assembly 5; the knob 2 is arranged on the housing 1, the front end of the knob 2 is exposed at the front side of the housing 1, the rear end of the knob 2 is exposed at the rear side of the housing 1, and the rear end of the knob 2 is also connected to a lock plate 3 that can rotate with the knob 2; the lock core 4 is arranged in the housing 1, and the front end of the lock core 4 with a lock hole is exposed at the front side of the housing 1; the combination wheel assembly 5 is arranged in the housing 1, and the combination wheel assembly 5 includes a plurality of relative to the housing 1. A rotatable character wheel 6 is exposed on the front side of the shell 1; the combination lock also includes a multi-functional bracket 7, which is arranged in the shell 1, and the multi-functional bracket 7 is integrally formed with a knob seat 8 and a lock core seat 9; the knob seat 8 includes a knob hole 10 that is through-opened on the multi-functional bracket 7, and the knob 2 is inserted in the knob hole 10 to achieve a rotatable connection with the shell 1; the lock core seat 9 includes a lock core hole 11 that is through-opened on the multi-functional bracket 7, and the lock core 4 is inserted in the lock core hole 11 to achieve a rotatable connection with the shell 1.

[0051] Combination Figures 1 to 3 As shown, in this embodiment, the housing 1 is composed of a rear shell 37 and a front cover 38 connected together.

[0052] Among them Figure 4 As shown, in this embodiment, a plurality of gear pawls 12 are integrally formed on the multifunctional bracket 7, and a protrusion 13 is protruded from the gear pawl 12 toward the cipher wheel assembly 5. A plurality of grooves 14 are formed on the character wheel 6 of the cipher wheel assembly 5 around its circumference, and the protrusion 13 can be snap-fitted in the groove 14 to achieve a spring stop during the rotation of the character wheel 6.

[0053] Among them Figure 4As shown, in this embodiment, the multifunctional bracket 7 is protrudingly provided with a support rib 15, and the support rib 15 is located on a side of the multifunctional bracket 7 close to the cipher wheel assembly 5, and the gear pawl 12 is located on the upper side of the support rib 15, and the gear pawl 12 can swing relative to the support rib 15 through deformation, and the swing of the gear pawl 12 can drive the protrusion 13 thereon to move away from or close to the character wheel 6.

[0054] Combination Figure 4 and Figure 5 As shown, in this embodiment, the upper portion of the support rib 15 is located between the gear pawl 12 and the side surface of the multi-functional bracket 7, and a swing gap 16 is provided for the gear pawl 12 to swing.

[0055] In this embodiment, when the operator turns the character wheel 6 to make it rotate, the side surface of the character wheel 6 will be able to act on the push block to deform the gear pawl 12, thereby causing the protrusion 13 to move away from the character wheel 6 and withdraw from the current groove 14. When the turning of the character wheel 6 stops, the gear pawl 12 will elastically recover and drive the protrusion 13 to re-engage in another groove 14.

[0056] Combination Figures 4 to 6 As shown, in this embodiment, a locking plate 17 is further provided in the housing 1, and the locking plate 17 includes a driving portion 18 and a driven portion 19. The driving portion 18 extends into the swing gap 16 and abuts against the rear side of the gear pawl 12, and the driven portion 19 extends into the knob hole 10. An avoidance groove 20 capable of forming a snap fit with the driven portion 19 is also provided on the outer side of the knob 2. When the gear pawl 12 swings toward the swing gap 16, it can push the driving portion 18 to move, so that the driven portion 19 has a movement tendency to approach the knob 2.

[0057] In this embodiment, when the character wheel 6 is being turned, the gear pawl 12 is deformed and swings toward the swing gap 16, so the gear pawl 12 will drag the locking plate 17 and make the driven portion 19 of the locking plate 17 plug and fit into the avoidance groove 20 of the knob 2. At this time, even if the knob 2 is operated, it cannot be rotated; when the knob 2 is rotating, the avoidance groove 20 on the knob 2 is staggered with the driven portion 19 of the locking plate 17. Therefore, when the locking plate 17 has a movement trend, the driven portion 19 will abut and fit against the side wall of the knob 2, making the locking plate 17 unable to move. Therefore, even if the character wheel 6 is turned at this time, the gear pawl 12 cannot be deformed because the locking plate 17 cannot move, thereby making the character wheel 6 unable to rotate.

[0058] Among them Figure 7As shown, in this embodiment, the cipher wheel assembly 5 further includes a spindle 21 inserted into the housing 1 and a plurality of coupling wheels 22 sleeved on the spindle 21, the character wheel 6 is also sleeved on the spindle 21, a plurality of coupling blocks 23 are convexly provided on the circumference of the coupling wheel 22, and a plurality of coupling grooves 24 are provided on the inner side of the character wheel 6, and the transmission connection between the character wheel 6 and the coupling wheel 22 is realized by the snap fit between the coupling blocks 23 and the coupling grooves 24.

[0059] Among them Figure 7 As shown, in this embodiment, the core shaft 21 is movably arranged relative to the character wheel 6, and a pushing block 25 is protruding from one end of the core shaft 21. The outer side of the pushing block 25 is exposed to one side of the housing 1, and the inner side of the pushing block 25 is in contact with the coupling wheel 22. When the core shaft 21 moves relative to the character wheel 6, it can push the coupling wheel 22 to move relative to the character wheel 6, so as to release the transmission connection between the character wheel 6 and the coupling wheel 22.

[0060] Among them Figure 8 As shown, in this embodiment, a reset plate 26 can be movably arranged in the housing 1, and an extension column 27 is protruded on the reset plate 26 toward the character wheel 6 assembly, and a connecting groove 28 is opened on the lower side of the extension column 27. The other end of the core shaft 21 is also exposed on one side of the housing 1, and the side wall of the core shaft 21 is snap-fitted with the connecting groove 28, so that a transmission connection is formed between the core shaft 21 and the reset plate 26, and the extension column 27 is abutted against the coupling wheel 22, and the reset plate 26 can push the core shaft 21 and the coupling wheel 22 to move, so that the transmission connection between the character wheel 6 and the coupling wheel 22 is restored.

[0061] Among them Fig. 9 As shown, in this embodiment, a guide groove 39 is further provided on the multifunctional bracket 7, and a guide rib 40 is convexly provided on the lower side of the reset plate 26. The guide rib 40 is embedded in the guide groove 39, and when the reset plate 26 moves, the guide rib 40 can slide along the guide groove 39.

[0062] Combination Fig. 9 and Fig.10 As shown, in this embodiment, a locking rod 29 is rotatably provided in the shell 1, a locking hole 30 is provided on the reset plate 26, the top of the locking rod 29 is penetrated in the locking hole 30, a switching block 31 is further provided at the bottom of the locking rod 29, the switching block 31 is exposed at the rear side of the shell 1, a password setting recess 32 is further provided at the top of the locking rod 29, an abutting edge 33 is provided on the inner side of the locking hole 30, and the rotation of the locking rod 29 can align or stagger the password setting recess 32 with respect to the abutting edge 33.

[0063] In this embodiment, when the password of the combination lock needs to be set, the transmission connection between the character wheel 6 and the coupling wheel 22 needs to be released. First, the switching block 31 located at the rear side of the housing 1 is rotated to rotate the locking rod 29 and align the password setting recess 32 on its top with the abutting edge 33 of the locking hole 30. Then, the pushing block 25 exposed on one side of the housing 1 is pushed to move the pushing block 25 toward the inside of the housing 1. The pushing block 25 drives the spindle 21 and the coupling wheel 22 to move relative to the character wheel 6, so that The transmission connection between the character wheel 6 and the coupling wheel 22 is released, and at the same time, the core shaft 21 moves back to drive the reset plate 26 to move accordingly, so that the abutting edge 33 of the locking hole 30 is matched with the password setting recess 32. If the switching block 31 is not rotated to make the password setting recess 32 align with the abutting edge 33, even if the pushing block 25 is pushed, the abutting edge 33 will interfere with the side of the locking rod 29, resulting in the reset plate 26 being unable to move, and thus the core shaft 21 and the coupling wheel 22 are also unable to move.

[0064] In this embodiment, when the password is reset, the end of the spindle 21 exposed on one side of the housing 1 can be pushed to move the spindle 21 relative to the character wheel 6. The movement of the spindle 21 will drive the reset plate 26 connected thereto to move accordingly. The reset plate 26 then drives the coupling wheel 22 to move, so that the coupling wheel 22 and the character wheel 6 are re-connected by transmission. With the movement of the reset plate 26, the abutting edge 33 of the locking hole 30 also withdraws from the password setting recess 32. Then, the switching block 31 is rotated to drive the locking rod 29 to rotate, so that the password setting recess 32 and the abutting edge 33 are staggered. At this point, the reset operation after the password is reset is completed.

[0065] Among them Fig.11 As shown, the knob seat 8 also includes a spring-stop plate 34, which is protruding on one side below the knob hole 10, and a spring-stop block 35 is protruding on the spring-stop plate 34 toward the knob 2. A spring-stop protrusion 36 is protruding on the side wall of the knob 2, and the spring-stop protrusion 36 abuts against the spring-stop block 35 to form an interference fit. When the knob 2 rotates, the spring-stop protrusion 36 can push the spring-stop block 35 to cause the spring-stop plate 34 to deform.

[0066] The specific assembly process in this embodiment is as follows: when assembling the combination lock, the lock core 4 and the knob 2 can be pre-assembled on the multi-functional bracket 7. During this process, the locking plate 17 and the reset plate 26 can also be pre-connected to the multi-functional bracket 7, and then the entire multi-functional bracket 7 is assembled into the housing 1. Finally, after the combination wheel assembly 5 is also assembled into the housing 1, the assembly of the entire combination lock can be completed.

[0067] The advantage of this embodiment is that a multifunctional bracket is used to support the knob and the lock core, and the structure for achieving the stop of the spring when the character wheel rotates is also integrally formed on the multifunctional bracket. The multifunctional bracket is also connected to a limit plate and a reset plate, so that multiple functions are achieved with one part, which effectively saves the space inside the combination lock and the overall volume of the combination lock, and can also simplify the entire assembly process.

[0068] The above specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A mechanical combination lock with compact structure and convenient assembly, comprising: Housing (1); A knob (2) is inserted into the housing (1), the front end of the knob (2) is exposed at the front side of the housing (1), the rear end of the knob (2) is exposed at the rear side of the housing (1), and the rear end of the knob (2) is also connected to a lock plate (3) that can rotate with the knob (2); A lock core (4) is arranged in the housing (1), and a front end of the lock core (4) provided with a lock hole is exposed at the front side of the housing (1); A cipher wheel assembly (5) is arranged in the housing (1), the cipher wheel assembly (5) comprising a plurality of character wheels (6) rotatable relative to the housing (1), the character wheels (6) being exposed at the front side of the housing (1); It is characterized in that Also included are: A multifunctional bracket (7) is arranged in the housing (1), and a knob seat (8) and a lock core seat (9) are integrally formed on the multifunctional bracket (7); The knob seat (8) comprises a knob hole (10) which is through-opened on the multifunctional bracket (7), and the knob (2) is inserted into the knob hole (10) to achieve a rotatable connection with the housing (1); The lock core seat (9) comprises a lock core hole (11) which is through-opened on the multifunctional bracket (7), and the lock core (4) is inserted into the lock core hole (11) to achieve a rotatable connection with the housing (1).

2. A compact and easy-to-assemble mechanical combination lock according to claim 1, characterized in that: The multifunctional bracket (7) is also integrally formed with a plurality of gear pawls (12), the gear pawls (12) are provided with a protrusion (13) protruding toward the cipher wheel assembly (5), the character wheel (6) of the cipher wheel assembly (5) is provided with a plurality of grooves (14) around its circumference, and the protrusions (13) can be snap-fitted into the grooves (14) to achieve a spring stop during the rotation of the character wheel (6).

3. A mechanical combination lock with compact structure and convenient assembly according to claim 2, characterized in that: The multifunctional bracket (7) is provided with a protruding support rib (15), the support rib (15) is located on a side of the multifunctional bracket (7) close to the code wheel assembly (5), the gear pawl (12) is located on the upper side of the support rib (15), the gear pawl (12) can swing relative to the support rib (15) by deformation, and the swing of the gear pawl (12) can drive the protrusion (13) on it to move away from or close to the character wheel (6).

4. A compact and easy-to-assemble mechanical combination lock according to claim 3, characterized in that: The upper part of the support rib (15) is located between the gear pawl (12) and the side surface of the multifunctional bracket (7), and a swing gap (16) is provided for the gear pawl (12) to swing.

5. A mechanical combination lock with compact structure and convenient assembly according to claim 4, characterized in that: A locking plate (17) is also provided in the housing (1), and the locking plate (17) includes a driving part (18) and a driven part (19). The driving part (18) extends into the swing gap (16) and abuts against the rear side of the gear pawl (12), and the driven part (19) extends into the knob hole (10). The outer side of the knob (2) is also provided with an avoidance groove (20) capable of forming a snap fit with the driven part (19). When the gear pawl (12) swings toward the swing gap (16), it can push the driving part (18) to move, so that the driven part (19) has a movement tendency to approach the knob (2).

6. A compact and easy-to-assemble mechanical combination lock according to claim 1, characterized in that: The cipher wheel assembly (5) further comprises a core shaft (21) inserted into the housing (1) and a plurality of coupling wheels (22) sleeved on the core shaft (21); the character wheel (6) is also sleeved on the core shaft (21); a plurality of coupling blocks (23) are convexly provided on the circumference of the coupling wheel (22); a plurality of coupling grooves (24) are provided on the inner side of the character wheel (6); and the transmission connection between the character wheel (6) and the coupling wheel (22) is realized by the clamping fit between the coupling blocks (23) and the coupling grooves (24).

7. A compact and easy-to-assemble mechanical combination lock according to claim 6, characterized in that: The core shaft (21) is movably arranged relative to the character wheel (6), and a pushing block (25) is protruding from one end of the core shaft (21). The outer side of the pushing block (25) is exposed at one side of the housing (1), and the inner side of the pushing block (25) is in contact with the coupling wheel (22). When the core shaft (21) moves relative to the character wheel (6), the coupling wheel (22) can be pushed to move relative to the character wheel (6), so as to release the transmission connection between the character wheel (6) and the coupling wheel (22).

8. A compact and easy-to-assemble mechanical combination lock according to claim 7, characterized in that: A reset plate (26) is movably arranged in the housing (1), and an extension column (27) is protruded on the reset plate (26) toward the character wheel (6) assembly, and a connecting groove (28) is provided on the lower side of the extension column (27). The other end of the core shaft (21) is also exposed on one side of the housing (1), and the side wall of the core shaft (21) is snap-fitted with the connecting groove (28), so that a transmission connection is formed between the core shaft (21) and the reset plate (26), and the extension column (27) is in abutment with the coupling wheel (22). The reset plate (26) can push the core shaft (21) and the coupling wheel (22) to move, so that the transmission connection between the character wheel (6) and the coupling wheel (22) is restored.

9. A compact and easy-to-assemble mechanical combination lock according to claim 8, characterized in that: A locking rod (29) is rotatably arranged in the shell (1), a locking hole (30) is provided on the reset plate (26), the top of the locking rod (29) is inserted into the locking hole (30), a switching block (31) is provided at the bottom of the locking rod (29), the switching block (31) is exposed at the rear side of the shell (1), a password setting recess (32) is provided at the top of the locking rod (29), an abutting edge (33) is provided inside the locking hole (30), and the locking rod (29) can be rotated so that the password setting recess (32) is aligned with or staggered relative to the abutting edge (33).

10. A mechanical combination lock with compact structure and convenient assembly according to claim 1, characterized in that: The knob seat (8) further comprises a spring stop plate (34), the spring stop plate (34) being protrudingly arranged on one side below the knob hole (10), a spring stop block (35) being protrudingly arranged on the spring stop plate (34) towards the knob (2), a spring stop protrusion (36) being protrudingly arranged on the side wall of the knob (2), the spring stop protrusion (36) abutting against the spring stop block (35) to form an interference fit, and when the knob (2) is rotated, the spring stop protrusion (36) can push the spring stop block (35) to cause the spring stop plate (34) to deform.

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