Mechanical coded lock with function of preventing password from being replaced by mistake

Abstract

A mechanical coded lock with a function of preventing a password from being replaced mistakenly comprises a shell. The mechanical lock cylinder assembly has a locking position state, an unlocking position state and a code changing position state; the coded lock assembly is used for locking the mechanical lock cylinder assembly; the switch component is used for driving the mechanical lock cylinder assembly; the switch component is at least provided with a locking channel, an unlocking channel and a code changing channel in the moving direction of the switch component, and the locking channel is directly communicated with the unlocking channel; the switch component is provided with limiting ribs; the shell is provided with a first stop step so as to limit the switch component to continue to move in the same direction. The shell is provided with a switching channel, the code changing channel is communicated with the unlocking channel through the switching channel, the limiting rib avoids the first stop step after passing through the switching channel, and therefore the switch component can continue to move. According to the utility model, the password replacement defect caused by improper operation of a user is effectively prevented, children and the like are prevented from replacing the password, and the use stability and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to a mechanical password lock with a function of preventing mistaken password replacement. 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, digital combination locks, and so on.

[0003] The combination in a mechanical combination lock is usually just a permutation, not a true combination. Some combination locks use a single dial that rotates several discs or cams inside the lock, while others use a set of numbered dials to directly activate the lock's internal mechanism.

[0004] As an example of the prior art, refer to patent document CN206693766U, which discloses a mechanism for preventing the wrong setting of a password in the unlocked state of a mechanical password lock, including a shell, a lock core and a password assembly, wherein the password assembly includes a plurality of character wheels and a character wheel core, and a core shaft passing through the character wheel core, when the character wheel is turned to the correct password, the core shaft can move left and right, and when the character wheel is turned to an incorrect password, the core shaft cannot move left and right; it is characterized in that: the password assembly also includes a limit block, a core push spring and a shaft push spring, a locking groove, an unlocking groove and a password changing groove are opened on the lock core in the circumferential direction, and a protruding band is further provided on the outer side of the lock core, the protruding band is located above the locking groove and the unlocking groove, and no protruding band is provided above the password changing groove.

[0005] The solution of the technical example has a reasonable structure and the advantage of not being able to change the password in the unlocked state. To a certain extent, it can avoid the situation where the user accidentally changes the password by dialing the wheel in the unlocked state, thereby improving the reliability of the password lock. In order to change the password, after unlocking, it is only necessary to continue to rotate the lock cylinder for a certain distance, and then switch from the unlocked state to the password change state. However, it still has certain defects. Specifically: there is no blocking structure in the process of switching the lock cylinder from the unlocked state to the password change state to prevent the user from misoperating. It only requires the lock cylinder to rotate a certain distance in the unlocking direction to achieve it. This is easy for non-users such as children to achieve, and then accidentally dial the wheel and change the password, resulting in not knowing the correct unlocking password, which causes inconvenience to use. Summary of the Invention

[0006] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a mechanical password lock with a function of preventing mistaken password replacement.

[0007] The technical solution of the utility model to solve the technical problem is: a mechanical password lock with a function of preventing accidental password change, comprising:

[0008] case;

[0009] A mechanical lock core assembly is assembled on the housing and is used to realize the locking function, and the mechanical lock core assembly has a locked position state, an unlocked position state and a code-changing position state;

[0010] A password lock assembly is assembled on the housing and is used to lock the mechanical lock core assembly;

[0011] A switch component, which is controlled by a user and is used to drive the mechanical lock cylinder assembly;

[0012] Along the moving direction of the switch member, the housing has at least a locking channel, an unlocking channel and a code changing channel adapted to the switch member, wherein the locking channel is directly connected to the unlocking channel;

[0013] The switch component has a limiting rib;

[0014] The housing is provided with a first stop step, which is arranged between the code changing channel and the unlocking channel. When the limiting rib abuts against the first stop step, the switch member is restricted from continuing to move in the same direction.

[0015] The shell has a switching channel, the code change channel is connected to the unlocking channel through the switching channel, and the switching channel is located at the starting end of the first stop step. The limiting rib can avoid the first stop step after passing through the switching channel, so that the switch component can continue to move.

[0016] In some preferred embodiments of the present invention, the switch component is a rotary switch component, the locking channel, unlocking channel and code change channel are arranged circumferentially on the shell, and the locking channel and unlocking channel are in the first plane, the code change channel is in the second plane, and the switching channel connects the first plane and the second plane.

[0017] It is worth mentioning that the switching channel is arranged vertically, the first stopping step is located above the switching channel, and the code switching channel is located below the switching channel.

[0018] It should be particularly emphasized that the housing has a second stop step, the second stop step and the code switching channel are in the second plane, and the code switching channel is located on one side of the switching channel, and the second stop step is located on the other side of the switching channel.

[0019] In some preferred embodiments of the present invention, the combination lock assembly includes one or more sets of combination wheels and character wheel cores, and a core shaft passing through the character wheel cores;

[0020] The mechanical lock core assembly has a password lock slot, and the core shaft can enter the password lock slot or exit the password lock slot;

[0021] When the character wheel is turned to the correct password, the core shaft can move, and the mechanical lock core assembly is driven to move through the switch member, and the core shaft is withdrawn from the password lock slot, thereby switching the mechanical lock core assembly to the unlocked position;

[0022] When the character wheel is turned to an incorrect password, the core shaft cannot move, and the core shaft is continuously located in the password lock slot and prevents the mechanical lock core assembly from moving, so that the mechanical lock core assembly remains in a locked position.

[0023] In some preferred embodiments of the present invention, the core shaft has a blocking rib, and the character wheel core has a movable groove; the blocking rib can enter the movable groove, and when the blocking rib abuts against the inner wall of the movable groove, a limiting fit is formed; the blocking rib can be withdrawn from the movable groove to form a movable gap;

[0024] The cipher wheel is provided with a positioning groove, and the character wheel core is provided with a positioning rib; when the positioning rib is inserted into the positioning groove, the character wheel core engages with the cipher wheel, so that the character wheel core moves together with the cipher wheel; when the positioning rib is withdrawn from the positioning groove, the character wheel core is separated from the cipher wheel, so that the cipher wheel rotates independently relative to the character wheel core.

[0025] Furthermore, the combination lock assembly further comprises a core push spring and an axle push spring; the core push spring acts on the wheel core so that the wheel core always has a movement tendency to move toward the side where the mechanical lock core assembly is located; the axle push spring acts on the spindle so that the spindle always has a movement tendency to move toward the side where the mechanical lock core assembly is located;

[0026] The mechanical lock core assembly has a code change slot, and the combination lock assembly further includes a limit block, which is located between the word wheel core and the mechanical lock core assembly;

[0027] When the mechanical lock core assembly switches to the code-changing position, the push shaft spring drives the core shaft into the code-changing slot, and the push core spring drives the limit block into the code-changing slot through the character wheel core, so that the positioning rib withdraws from the positioning slot, and the character wheel core is separated from the password wheel.

[0028] Optionally, the mechanical lock core assembly has a protruding section and a recessed section, the limiting block can abut against the protruding section, and the code switching slot is located in the recessed section.

[0029] Preferably, a boost block is further provided in the housing, one end of the boost block abuts against the core push spring, and the other end abuts against the character wheel core;

[0030] A through hole is provided on the boosting block, and the push shaft spring passes through the through hole and abuts against the core shaft.

[0031] In some preferred embodiments of the present invention, a key lock core assembly is further included, wherein the mechanical lock core assembly is provided with a receiving hole, and the key lock core assembly is disposed in the receiving hole;

[0032] A transmission groove is provided at the bottom of the accommodating hole, and the key lock core assembly has a transmission shaft. The transmission shaft is inserted into the transmission groove, and the transmission groove has an idle stroke section. When the transmission shaft passes through the idle stroke section and abuts against the inner wall of the transmission groove, the key lock core assembly and the mechanical lock core assembly form a transmission fit.

[0033] The beneficial effect of the present invention is that a structural mechanism to prevent accidental replacement is provided between the unlocking channel and the code changing channel (i.e., the first stop step and the limiting rib cooperate with each other), so that the user cannot switch the mechanical lock core assembly to the code changing position by a single rotation operation, but must switch the mechanical lock core assembly to the code changing position by a rotation followed by a pressing operation. This effectively prevents the defect of code changing caused by improper user operation, and also prevents non-users such as children from changing the code, effectively improving the stability and safety of the mechanical combination lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front schematic diagram of the mechanical lock core assembly in the locked position.

[0035] Figure 2 It is a partial structural diagram of the mechanical lock core assembly in the locked position.

[0036] Figure 3 It is a front view of the mechanical lock cylinder assembly in the unlocked position.

[0037] Figure 4 It is a partial structural diagram of the mechanical lock core assembly in the unlocked position.

[0038] Figure 5 It is a front view of the mechanical lock core assembly in the code changing position.

[0039] Figure 6 It is a partial structural diagram of the mechanical lock core assembly in the code changing position.

[0040] Figure 7 It is a schematic diagram of the local structure of the shell.

[0041] Figure 8 It is a structural diagram of the switch component.

[0042] Figure 9It is a comparative diagram of the limit ribs located in the locking channel, unlocking channel, switching channel, and code change channel.

[0043] Figure 10 It is an assembly diagram of the switch component and the mechanical lock core assembly.

[0044] Figure 11 It is an exploded schematic diagram of the cipher wheel, character wheel core, core shaft and limit block.

[0045] Figure 12 It is an exploded diagram of the booster block, core push spring, and shaft push spring.

[0046] Figure 13 It is an exploded schematic diagram of the mechanical lock cylinder assembly and the key lock cylinder assembly.

[0047] Figure 14 It is a schematic diagram of the drive shaft in the drive groove.

[0048] Figure 15 This is a schematic diagram of the key lock cylinder assembly being unlocked by the key.

[0049] Figure 16 It is a cross-sectional view of the mechanical lock core assembly in the locked position.

[0050] Figure 17 It is a cross-sectional view of the mechanical lock cylinder assembly in the unlocked position.

[0051] Figure 18 It is a cross-sectional view of the mechanical lock core assembly in the code changing position.

[0052] Figure 19 It is a structural schematic diagram and a partial enlarged schematic diagram of the mechanical lock core assembly when it is in the unlocked position and not pressed.

[0053] Figure 20 It is a structural schematic diagram and a partial enlarged schematic diagram of the mechanical lock core assembly in the unlocked position and after being pressed.

[0054] In the figure: 1, housing; 11, locking channel; 12, unlocking channel; 13, code change channel; 14, switching channel; 15, first stop step; 1a, first plane; 1b, second plane; 16, second stop step; 2, mechanical lock core assembly; 2a, locked position; 2b, unlocked position; 2c, code change position; 21, combination lock slot; 22, code change slot; 23, protruding section; 24, recessed section; 25, receiving hole; 251, Transmission groove; 2511, idle travel section; 26, lock rod or lock tongue; 3, combination lock assembly; 31, combination wheel; 311, positioning groove; 32, character wheel core; 321, movable groove; 322, positioning rib; 33, core shaft; 331, blocking rib; 34, core push spring; 35, shaft push spring; 36, limit block; 37, booster block; 371, through hole; 4, switch component; 41, limit rib; 5, key lock core assembly; 51, transmission shaft; 52, key. DETAILED DESCRIPTION

[0055] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely a specific description of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limiting the present invention.

[0056] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0057] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0058] Example 1

[0059] Reference Figures 1 to 9 、 Figures 16 to 20A mechanical password lock with an anti-accidental password change function includes: a housing 1; a mechanical lock core assembly 2, which is assembled on the housing 1, and the mechanical lock core assembly 2 can be assembled with a lock rod or lock tongue 26 of various shapes, and the lock rod or lock tongue 26 can form a structural interference with an external cabinet door or other object, thereby realizing a locking function, and the mechanical lock core assembly 2 has a locked position state 2a, an unlocked position state 2b and a code change position state 2c; a password lock assembly 3, which is assembled on the housing 1, and the password lock assembly 3 is used to lock the mechanical lock core assembly 2; a switch component 4, which is controlled by a user, and the switch component 4 is used to drive the mechanical lock core assembly 2.

[0060] Among them, the difference from the prior art is: Figures 7 to 9 、 Figures 16 to 20 , along the moving direction of the switch member 4, the housing 1 has at least a locking channel 11, an unlocking channel 12 and a code-changing channel 13 adapted to the switch member 4, wherein the locking channel 11 is directly connected to the unlocking channel 12; the switch member 4 has a limiting rib 41; the housing 1 has a first stop step 15, and the first stop step 15 is arranged between the code-changing channel 13 and the unlocking channel 12. When the limiting rib 41 abuts against the first stop step 15, it limits the switch member 4 from continuing to move in the same direction; the housing 1 has a switching channel 14, and the code-changing channel 13 is connected to the unlocking channel 12 through the switching channel 14, and the switching channel 14 is located at the starting end of the first stop step 15. The limiting rib 41 can avoid the first stop step 15 after passing through the switching channel 14, so that the switch member 4 can continue to move.

[0061] The above content records the basic structural scheme of the utility model, and its operating principle is as follows:

[0062] Unlocking operation: First, the user correctly enters the password, unlocking the combination lock assembly 3 (releasing the lock on the mechanical lock cylinder assembly 2). Second, the user rotates the switch member 4 (e.g., a knob), causing the switch member 4 to move from the locking channel 11 to the unlocking channel 12. Simultaneously, the switch member 4 drives the mechanical lock cylinder assembly 2 from the locked position 2a to the unlocked position 2b. At this point, the limiting rib 41 abuts against the first stop step 15, restricting the switch member 4 from further movement in the same direction, preventing it from entering the code change channel 13.

[0063] Locking operation: First, in the unlocked position 2b, the user rotates the switch member 4 (e.g., a knob) in the opposite direction, causing the switch member 4 to move from the unlocking channel 12 to the locking channel 11. Simultaneously, the switch member 4 drives the mechanical lock cylinder assembly 2 from the unlocked position 2b to the locked position 2a. Second, the user scrambles the password to prevent others from opening the lock and leaking the password.

[0064] Password Change Operation: After completing the unlocking operation, the user presses the switch member 4 (e.g., a knob), causing the switch member 4 to pass from the unlocking channel 12 through the switching channel 14 and avoid the first stop step 15. The switch member 4 then rotates from the other end of the switching channel 14 into the code change channel 13. Simultaneously, the switch member 4 drives the mechanical lock core assembly 2 from the unlocking position 2b to the code change position 2c. The user can then change the code on the combination lock assembly 3 to change the password. Generally speaking, the mechanical lock core assembly 2 switches from the locked position 2a to the code change position 2c through a three-step operation: rotation, pressing, and rotation.

[0065] It should be emphasized that in the structural solution of the present application, a structural mechanism is provided between the unlocking channel 12 and the code changing channel 13 to prevent accidental code changing (i.e., the first stop step 15 and the limiting rib 41 are engaged). The user cannot switch the mechanical lock core assembly 2 to the code changing position 2c by a single rotation operation. Instead, the mechanical lock core assembly 2 must be switched to the code changing position 2c by a rotation followed by a pressing operation. This effectively prevents the code changing defect caused by improper user operation and prevents non-users such as children from changing the code, effectively improving the stability and safety of the mechanical combination lock.

[0066] Furthermore, it should be emphasized that the positioning of the anti-incorrection mechanism (i.e., the limiting engagement between the first stop step 15 and the limiting rib 41) is removable. For example, positioning the switching channel 14 between the locking channel 11 and the code switching channel 13 can achieve the same effect. The specific arrangement chosen will be determined by actual needs and is not specifically limited here.

[0067] Preferably, refer to Figure 9The switch member 4 is a rotary switch member 4. The locking channel 11, unlocking channel 12, and code change channel 13 are arranged circumferentially on the housing 1. The locking channel 11 and unlocking channel 12 are located in the first plane 1a, the code change channel 13 is located in the second plane 1b, and the switching channel 14 connects the first plane 1a and the second plane 1b. Preferably, the switching channel 14 is arranged vertically, the first stop step 15 is located above the switching channel 14, and the code change channel 13 is located below the switching channel 14. Since the code change channel 13 is located in a different plane from the locking channel 11 and the unlocking channel 12, the user can switch between the locking channel 11 and the unlocking channel 12 of the switch member 4 through a single rotation operation, but cannot enter the code change operation through a rotation operation. When the user moves the switch component 4 to the connection between the switching channel 14 and the unlocking channel 12 through a rotating operation, the switch component 4 is able to enter the switching channel 14 through a pressing operation (non-rotating operation), and when the switching channel 14 is connected to the code switching channel 13, the switch component 4 is allowed to enter the code switching channel 13 through a rotating operation.

[0068] After successfully changing the password, the switch member 4 needs to be withdrawn from the code exchange channel 13 and returned to the unlocking channel 12. However, during the reverse operation, since the code exchange channel 13 is not easily visible within the housing 1, the switch member 4 cannot easily enter the switching channel 14 from the code exchange channel 13 without a guide structure. To eliminate the above-mentioned drawbacks, a more preferred solution is to provide the housing 1 with a second stop step 16. The second stop step 16 and the code exchange channel 13 are located in the second plane 1b, with the code exchange channel 13 located on one side of the switching channel 14 and the second stop step 16 located on the other side of the switching channel 14. The second stop step 16 serves to limit and guide the limiting rib 41 on the switch member 4. That is, when it is necessary to return to the unlocking channel 12, the switch member 4 is rotated in the opposite direction until the limit block 36 contacts the second stop step 16. At this point, the switch member 4 can be pulled upward to smoothly enter the switching channel 14.

[0069] Example 2

[0070] Based on the structure of the first embodiment, this embodiment provides a more preferred structural solution for each component. Figures 1 to 6 、 Figures 10 to 12 , specifically:

[0071] The combination lock assembly 3 includes one or more combinations of combination wheels 31 and a combination wheel core 32, as well as a spindle 33 passing through the combination wheel core 32. The mechanical lock core assembly 2 has a combination lock slot 21, and the spindle 33 can enter the combination lock slot 21 or exit the combination lock slot 21. The working principle of the combination lock assembly 3 is as follows: when the combination wheel is turned to the correct combination, the spindle 33 can move, and the mechanical lock core assembly 2 is driven to move by the switch component 4, and the spindle 33 exits the combination lock slot 21, thereby switching the mechanical lock core assembly 2 to the unlocked position state 2b; when the combination wheel is turned to an incorrect combination, the spindle 33 cannot move, and the spindle 33 is continuously located in the combination lock slot 21 and prevents the mechanical lock core assembly 2 from moving, so that the mechanical lock core assembly 2 remains in the locked position state 2a.

[0072] Furthermore, in order to realize the partial cooperation function between the core shaft 33 and the character wheel core 32, the core shaft 33 is provided with a blocking rib 331, and the character wheel core 32 is provided with a movable groove 321; the blocking rib 331 can enter the movable groove 321, and when the blocking rib 331 abuts against the inner wall of the movable groove 321, a limited cooperation is formed; the blocking rib 331 can be withdrawn from the movable groove 321 to form a movable gap; on the other hand, the cipher wheel 31 is provided with a positioning groove 311, and the character wheel core 32 is provided with a positioning rib 322; when the positioning rib 322 is inserted into the positioning groove 311, the character wheel core 32 is engaged with the cipher wheel 31, so that the character wheel core 32 moves together with the cipher wheel 31; when the positioning rib 322 is withdrawn from the positioning groove 311, the character wheel core 32 is separated from the cipher wheel 31, so that the cipher wheel 31 rotates independently relative to the character wheel core 32.

[0073] Furthermore, the combination lock assembly 3 also includes a core push spring 34 and a shaft push spring 35 to provide power. Specifically, the core push spring 34 acts on the wheel core 32, causing it to consistently move toward the side of the mechanical lock core assembly 2. The shaft push spring 35 acts on the spindle 33, causing it to consistently move toward the side of the mechanical lock core assembly 2. The mechanical lock core assembly 2 includes a code change slot 22. The combination lock assembly 3 also includes a limit block 36 located between the wheel core 32 and the mechanical lock core assembly 2. The operating principle is as follows: when the mechanical lock core assembly 2 switches to the code change position 2c, the shaft push spring 35 drives the spindle 33 into the code change slot 22, and the core push spring 34, through the wheel core 32, drives the limit block 36 into the code change slot 22, causing the positioning rib 322 to retract out of the positioning slot 311, separating the wheel core 32 from the combination wheel 31.

[0074] The working principles of the combination lock assembly 3 and the mechanical lock core assembly 2 are as follows:

[0075] Locked position status: reference Figures 1 and 2 、 Figure 16 Under the action of the push spring 35, the core shaft 33 remains in the combination lock slot 21, preventing the mechanical lock core assembly 2 from moving, thereby maintaining the mechanical lock core assembly 2 in the locked position 2a. Simultaneously, the blocking rib 331 on the core shaft 33 is misaligned with the movable slot 321 of the character wheel core 32, forming a limited engagement to prevent the core shaft 33 from retreating and preventing the switch member 4 (e.g., a knob) from rotating. Furthermore, the positioning rib 322 on the character wheel core 32 inserts into the positioning slot 311 on the combination wheel 31, ensuring that turning the combination wheel 31 simultaneously drives the rotation of the character wheel core 32.

[0076] Unlocked position state 2b: refer to Figures 3 and 4 、 Figure 17 、 Figures 19 and 20 The positioning rib 322 on the character wheel core 32 is inserted into the positioning groove 311 on the code wheel 31. The code wheel 31 is turned to the correct code, so that the blocking rib 331 on the core shaft 33 is aligned with the movable groove 321 of the character wheel core 32 and provides a movable gap. The switch member 4 (such as a knob) is operated, and the mechanical lock core assembly 2 squeezes the core shaft 33 (the squeezing force is greater than the elastic force of the push shaft spring 35) so that the core shaft 33 disengages from the code lock groove 21 and moves backward along the movable gap. The switch member 4 (such as a knob) is unlocked. After the switch member 4 is rotated into place (generally rotated 180° to unlock), the mechanical lock core assembly 2 is unlocked. In addition, the limiting rib 41 abuts against the first stop step 15 and restricts the switch member 4 from continuing to move in the same direction, that is, the switch member 4 cannot enter the code change channel 13.

[0077] Escape position state 2c: refer to Figures 5 and 6 、 Figure 18 , the switch member 4 (such as a knob) is operated to change the password (preferably pressed and then rotated 90 degrees), the push shaft spring 35 drives the core shaft 33 into the code change slot 22, and the push core spring 34 drives the limit block 36 through the character wheel core 32 to enter the code change slot 22, so that the positioning rib 322 is withdrawn to the outside of the positioning slot 311, and the character wheel core 32 is separated from the code wheel 31. At this time, the code wheel 31 can be driven alone to change the password. After determining the new password, the switch member 4 (such as a knob) is reversed. The mechanical lock core assembly 2 squeezes the limit block 36 and the core shaft 33 and withdraws to the outside of the code change slot 22 (the squeezing force is greater than the elastic force of the push shaft spring 35 and the push core spring 34), so that the character wheel core 32 re-engages with the code wheel 31, and the character wheel core 32 moves together with the code wheel 31, realizing the password change function.

[0078] Optionally, refer to Figure 10The mechanical lock core assembly 2 has a protruding section 23 and a recessed section 24. The stopper 36 can abut against the protruding section 23, and the code switching slot 22 is located in the recessed section 24. A height difference exists between the protruding section 23 and the recessed section 24, providing sufficient distance for the stopper 36 to move forward or backward. Furthermore, when the stopper 36 reaches the junction of the protruding section 23 and the recessed section 24, a noticeable jerking sensation is felt. This jerking sensation allows the user to determine the current position of the mechanical lock core assembly 2.

[0079] Preferably, refer to Figure 12 In order to provide installation space for the push shaft spring 35 and the push core spring 34 so that both have more stable movement performance, the adopted structural solution is as follows: a booster block 37 is further provided in the housing 1, one end of the booster block 37 is against the push core spring 34, and the other end is against the character wheel core 32; wherein, a through hole 371 is opened on the booster block 37, and the push shaft spring 35 passes through the through hole 371 and is against the core shaft 33.

[0080] Example 3

[0081] Based on the structure of any of the above embodiments, in this embodiment, in order to prevent the password from being forgotten and to realize the function of emergency unlocking, the scheme adopted is: Figures 13 to 15 , also includes a key lock cylinder assembly 5. The mechanical lock cylinder assembly 2 is provided with a receiving hole 25, and the key lock cylinder assembly 5 is arranged in the receiving hole 25; a transmission groove 251 is provided at the bottom of the receiving hole 25, and the key lock cylinder assembly 5 has a transmission shaft 51, and the transmission shaft 51 is inserted into the transmission groove 251, and the transmission groove 251 has an idle stroke section 2511. When the transmission shaft 51 passes through the idle stroke section 2511 and abuts against the inner wall of the transmission groove 251, the key lock cylinder assembly 5 and the mechanical lock cylinder assembly 2 form a transmission fit. It is worth mentioning that the idle stroke is set so that when the switch component 4 or the key lock cylinder assembly 5 is used alone, the two will not affect each other. Specifically, when the switch component 4 is rotated, the key lock cylinder assembly 5 does not move; when the key 52 is used to drive the key lock cylinder assembly 5, the switch component 4 does not rotate. As a result, the operation of both is smoother.

[0082] It is worth noting that other technical solutions of the present invention belong to the existing technology and are therefore not described in detail.

[0083] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A mechanical combination lock with a function of preventing accidental password change, comprising: Housing (1); A mechanical lock core assembly (2) is assembled on the housing (1) and is used to realize a locking function, and the mechanical lock core assembly (2) has a locked position state (2a), an unlocked position state (2b) and a code-changing position state (2c); A password lock assembly (3) is assembled on the housing (1), and the password lock assembly (3) is used to lock the mechanical lock core assembly (2); A switch component (4) which is controlled by a user and is used to drive the mechanical lock core assembly (2); Its characteristics are: Along the moving direction of the switch member (4), the housing (1) has at least a locking channel (11), an unlocking channel (12) and a code switching channel (13) adapted to the switch member (4), wherein the locking channel (11) is directly connected to the unlocking channel (12); The switch component (4) has a limiting rib (41); The housing (1) is provided with a first stop step (15), which is arranged between the code switching channel (13) and the unlocking channel (12). When the limiting rib (41) abuts against the first stop step (15), the switch member (4) is restricted from continuing to move in the same direction. The housing (1) is provided with a switching channel (14), the code-changing channel (13) is connected to the unlocking channel (12) through the switching channel (14), and the switching channel (14) is located at the starting end of the first stop step (15). The limiting rib (41) can avoid the first stop step (15) after passing through the switching channel (14), so that the switch component (4) can continue to move.

2. The mechanical combination lock with the function of preventing accidental password change according to claim 1, characterized in that: The switch component (4) is a rotary switch component (4); the locking channel (11), the unlocking channel (12) and the code-changing channel (13) are arranged circumferentially on the housing (1); the locking channel (11) and the unlocking channel (12) are located in a first plane (1a); the code-changing channel (13) is located in a second plane (1b); and the switching channel (14) connects the first plane (1a) and the second plane (1b).

3. The mechanical combination lock with the function of preventing accidental password change according to claim 2, characterized in that: The switching channel (14) is arranged vertically, the first stopping step (15) is located above the switching channel (14), and the code switching channel (13) is located below the switching channel (14).

4. The mechanical combination lock with the function of preventing accidental password change according to claim 3, characterized in that: The housing (1) has a second stop step (16), the second stop step (16) and the code switching channel (13) are located in the second plane (1b), and the code switching channel (13) is located on one side of the switching channel (14), and the second stop step (16) is located on the other side of the switching channel (14).

5. The mechanical combination lock with the function of preventing accidental password change according to claim 1, characterized in that: The combination lock assembly (3) comprises one or more combinations of combination wheels (31) and a character wheel core (32), and a core shaft (33) passing through the character wheel core (32); The mechanical lock core assembly (2) has a password lock slot (21), and the core shaft (33) can enter the password lock slot (21) or exit the password lock slot (21); When the character wheel is turned to the correct password, the core shaft (33) can move, and the mechanical lock core assembly (2) is driven to move through the switch member (4), and the core shaft (33) is withdrawn to the outside of the password lock slot (21), thereby switching the mechanical lock core assembly (2) to the unlocked position state (2b); When the character wheel is turned to an incorrect password, the core shaft (33) cannot move, and the core shaft (33) is continuously located in the password lock slot (21) and prevents the mechanical lock core assembly (2) from moving, so that the mechanical lock core assembly (2) remains in the locked position state (2a).

6. The mechanical combination lock with the function of preventing accidental password change according to claim 5, characterized in that: The core shaft (33) is provided with a blocking rib (331), and the character wheel core (32) is provided with a movable groove (321); the blocking rib (331) can enter the movable groove (321), and when the blocking rib (331) and the inner wall of the movable groove (321) are abutted against each other, a limiting fit is formed; the blocking rib (331) can be withdrawn from the movable groove (321) to form a movable gap; The cipher wheel (31) is provided with a positioning groove (311), and the character wheel core (32) is provided with a positioning rib (322); when the positioning rib (322) is inserted into the positioning groove (311), the character wheel core (32) engages with the cipher wheel (31), so that the character wheel core (32) moves along with the cipher wheel (31); when the positioning rib (322) is withdrawn from the positioning groove (311), the character wheel core (32) is separated from the cipher wheel (31), so that the cipher wheel (31) rotates independently relative to the character wheel core (32).

7. The mechanical combination lock with the function of preventing accidental password change according to claim 5, characterized in that: The combination lock assembly (3) further comprises a core push spring (34) and an axle push spring (35); the core push spring (34) acts on the wheel core (32) so that the wheel core (32) always has a movement tendency to move toward the side where the mechanical lock core assembly (2) is located; the axle push spring (35) acts on the core shaft (33) so that the core shaft (33) always has a movement tendency to move toward the side where the mechanical lock core assembly (2) is located; The mechanical lock core assembly (2) has a code change slot (22), and the combination lock assembly (3) further includes a limit block (36), wherein the limit block (36) is located between the character wheel core (32) and the mechanical lock core assembly (2); When the mechanical lock core assembly (2) switches to the code switching position state (2c), the push shaft spring (35) drives the core shaft (33) to enter the code switching groove (22), and the push core spring (34) drives the limit block (36) to enter the code switching groove (22) through the character wheel core (32), so that the positioning rib (322) retreats to the outside of the positioning groove (311), and the character wheel core (32) is separated from the code wheel (31).

8. The mechanical combination lock with the function of preventing accidental password change according to claim 7, characterized in that: The mechanical lock core assembly (2) has a protruding section (23) and a recessed section (24), the limiting block (36) can abut against the protruding section (23), and the code switching slot (22) is located in the recessed section (24).

9. The mechanical combination lock with the function of preventing accidental password change according to claim 7, characterized in that: The housing (1) is further provided with a boosting block (37), one end of which abuts against the core pushing spring (34), and the other end abuts against the character wheel core (32); The boosting block (37) is provided with a through hole (371), and the push shaft spring (35) passes through the through hole (371) and abuts against the core shaft (33).

10. The mechanical combination lock with the function of preventing accidental password change according to claim 1, characterized in that: It also includes a key lock core assembly (5), wherein the mechanical lock core assembly (2) is provided with a receiving hole (25), and the key lock core assembly (5) is arranged in the receiving hole (25); A transmission groove (251) is provided at the bottom of the accommodating hole (25), and the key lock core assembly (5) has a transmission shaft (51). The transmission shaft (51) is inserted into the transmission groove (251), and the transmission groove (251) has an idle stroke section (2511). When the transmission shaft (51) passes through the idle stroke section (2511) and abuts against the inner wall of the transmission groove (251), the key lock core assembly (5) and the mechanical lock core assembly (2) form a transmission fit.

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