CN219262012U - Coded lock and locking mechanism thereof - Google Patents

Abstract

The utility model discloses a coded lock and a locking mechanism thereof, wherein the locking mechanism comprises a switch knob, a rotating sleeve, a lock shaft and an unlocking spring; the switch knob is coaxially connected with the rotary sleeve and is rotationally matched in the lock body of the coded lock; the peripheral surface of the switch knob is provided with a limit groove which is arranged opposite to the coded shaft of the coded lock; the lock shaft is in rotary fit in the rotary sleeve; the inner wall of the rotating sleeve is provided with a rotating sleeve convex part, the rotating sleeve convex part is provided with a high point and a low point, and a transition line segment is connected between the high point and the low point; the peripheral surface of the lock shaft is provided with a lock shaft convex part which is arranged opposite to the rotating sleeve convex part; the unlocking spring is arranged in the lock body of the coded lock and acts on the lock shaft so that the lock shaft protruding part abuts against the rotating sleeve protruding part. According to the utility model, through the relative action of the rotating sleeve convex part and the locking shaft convex part, the elastic force of the unlocking spring can be converted into the driving force for rotating the rotating sleeve, so that the switch knob is driven to rotate towards the unlocking state, and the operation is more labor-saving and the unlocking is smoother.

Description

Coded lock and locking mechanism thereof

Technical Field

The utility model relates to the technical field of coded locks, in particular to a coded lock and a locking mechanism thereof.

Background

The coded lock, i.e. the character wheel lock, is a large category of locks, and is generally unlocked by using a group of numbers or symbol type codes, so that a user only needs to remember the set codes without configuring a key, and the lock has certain convenience in use.

The coded lock is usually a mechanical lock, each linkage mechanism exists in the lock, and in the unlocking state, each linkage mechanism is in an active state and can rotate a knob to unlock. The knob of trick lock links simultaneously with locking mechanism, wheel mechanism usually, not only needs to resist the reaction force when locking mechanism unblock when rotating the knob, still resists the locking effort of wheel mechanism, also needs to promote the password axle of wheel mechanism in order to remove the circumference spacing effect of password axle to the knob promptly, therefore when rotating the knob with the unblanking operation more laborious, user experience is relatively poor.

Disclosure of Invention

The utility model aims to provide a coded lock and a locking mechanism thereof, which are more labor-saving in the unlocking process and smoother in unlocking.

In order to achieve the above object, one of the solutions of the present utility model is:

a locking mechanism of a coded lock comprises a switch knob, a rotating sleeve, a lock shaft and an unlocking spring; the switch knob is coaxially connected with the rotating sleeve and is rotationally matched in the lock body of the coded lock; the peripheral surface of the switch knob is provided with a limit groove which is arranged opposite to the coded shaft of the coded lock; the lock shaft is in rotary fit in the rotary sleeve; the inner wall of the rotating sleeve is provided with a rotating sleeve convex part, the rotating sleeve convex part is provided with a high point and a low point, and a transition line segment is connected between the high point and the low point; the peripheral surface of the lock shaft is provided with a lock shaft convex part which is arranged opposite to the rotating sleeve convex part; the unlocking spring is arranged in the lock body of the coded lock and acts on the lock shaft; under the action of the elasticity of the unlocking spring, the lock shaft protruding part is abutted against the rotating sleeve protruding part, so that the rotating sleeve can drive the lock shaft to stretch and retract when rotating, and the locking mechanism can be switched between the locking state and the unlocking state.

The locking mechanism further comprises a lock tongue arranged in the limit groove; the coded shaft of the coded lock is movably matched with the lock tongue to realize the rotation stopping function of the locking mechanism.

Preferably, the locking mechanism further comprises an insert and a yielding spring; the periphery of the switch knob is provided with a movable groove communicated with the limit groove; the two ends of the movable groove are respectively provided with a large opening and a small opening; the lock tongue is movably matched in the movable groove and is provided with a lock tongue protruding part penetrating through the small opening, and the locking side of the lock tongue protruding part is provided with a guide inclined plane; the insert is fixedly connected to the large opening; the yielding spring is arranged between the lock tongue and the insert, so that the lock tongue is kept to be abutted against the inner side of the small opening.

Preferably, the locking mechanism further comprises a clamping ring sleeved on the peripheral surface of the switch knob, which is close to one end of the rotating sleeve, and the clamping ring axially limits the switch knob.

And an inserting structure is arranged on the opposite surface of the switch knob and the rotating sleeve.

Preferably, the plug structure comprises a plurality of plug posts arranged on the end face of the switch knob and a plurality of jacks which are arranged on the end face of the rotating sleeve and matched with the plug posts.

The axis of the rotating sleeve is provided with a guide hole, one end of the lock shaft facing the guide hole is a guide shaft, and the guide shaft penetrates through the guide hole.

One of the solutions of the utility model is:

the coded lock comprises a locking mechanism of the coded lock and a lock body, wherein the locking mechanism is installed in the lock body.

The lock body comprises a lock seat and a cover plate which are mutually covered; the lock seat is provided with a mounting hole for mounting the locking mechanism and a locking groove communicated with the mounting hole; the cover plate is provided with a movable hole corresponding to the mounting hole; the lock shaft penetrates through the locking groove.

Preferably, the tail end of the cover plate is locked on the lock seat through a screw.

After the technical scheme is adopted, the utility model has the following technical effects:

the locking mechanism is used for pushing the lock shaft to the rotating sleeve through the unlocking spring, and through the movable fit of the rotating sleeve convex part of the rotating sleeve and the lock shaft convex part of the lock shaft, the lock shaft can stretch out and draw back only with small force to switch the locking state and the unlocking state of the locking mechanism in the rotating process of the rotating sleeve, a user only needs to rotate the switch knob with small force to drive the rotating sleeve to rotate and enable the lock shaft convex part to be separated from the low point of the rotating sleeve convex part, the force of the lock shaft convex part abutting on the transition line segment can be converted into circumferential driving force for driving the rotating sleeve to rotate, and an end user can complete unlocking of the lock by rotating the switch knob only with small force, so that the operation is more labor-saving, and the unlocking process is smoother and more convenient.

Drawings

FIG. 1 is an exploded view of an embodiment of the present utility model;

FIG. 2 is a perspective view of a switch knob according to an embodiment of the present utility model;

FIG. 3 is a perspective view of a swivel sleeve according to an embodiment of the utility model;

FIG. 4 is a perspective view of a first embodiment of a print wheel according to an embodiment of the present utility model;

FIG. 5 is a front view of a first embodiment of a character wheel according to an embodiment of the present utility model;

FIG. 6 is a perspective view of a first embodiment of an inner sleeve according to an embodiment of the present utility model;

FIG. 7 is a perspective view of a second embodiment of a print wheel according to an embodiment of the present utility model;

FIG. 8 is a front view of a second embodiment of a print wheel according to an embodiment of the present utility model;

FIG. 9 is a perspective view of a second embodiment of an inner sleeve according to an embodiment of the present utility model;

FIG. 10 is a perspective view of a bushing according to an embodiment of the utility model;

FIG. 11 is a perspective view of a password axis according to an embodiment of the utility model;

FIG. 12 is a perspective view of a stop according to an embodiment of the present utility model;

FIG. 13 is a perspective view of a code searching knob according to an embodiment of the present utility model;

FIG. 14 is a perspective view of a baffle plate according to an embodiment of the present utility model;

FIG. 15 is a perspective view of a stop block according to an embodiment of the present utility model;

FIG. 16 is a cross-sectional view of a locked state first embodiment of the present utility model;

FIG. 17 is a second cross-sectional view of a locked state of an embodiment of the present utility model;

FIG. 18 is a cross-sectional view of a code search state according to an embodiment of the present utility model;

FIG. 19 is a second cross-sectional view of a code searching state according to an embodiment of the present utility model;

FIG. 20 is a cross-sectional view of an escape state of an embodiment of the present utility model;

reference numerals illustrate:

1- - -a lock body;

11-a lock base; 111—mounting holes; 112- -mounting slots;

113-locking grooves; 12- - -cover plate; 121—a movable aperture;

122-a character wheel hole; 13-a screw; 14-anti-drilling sheet;

2- - -locking mechanism;

21- - -a switch knob; 211- -a limit groove; 212- -plug;

213—a movable slot; 213 a-large opening; 213 b-small opening;

214—a yield slot; 22- -rotating sleeve; 221—a swivel boss;

221 a-high point; 221 b-low point; 221 c-a transition line segment;

222- -jack; 223- -a pilot hole; 224—a push block;

23- - -a lock shaft; 231-locking shaft protrusion; 232- -a guide shaft;

24- - -unlocking spring; 25-a lock tongue; 251- -tongue protrusion;

252—a guiding ramp; 26- - -an insert; 27— a yielding spring;

28- - -a clasp;

3- - -a character wheel mechanism;

31- - -a password axis; 311—locking bumps; 312—a first magnet;

32- - -a cipher seat; 321- -a character wheel groove; 33- - -a character wheel assembly;

331-character wheel; 3311—a print wheel mating portion; 3312-liner aperture;

3313-inner race aperture; 3314-Bush caulking groove; 3315-a second magnet;

3316-anti-rotation slots; 332—a bushing; 3321-unlocking groove;

3322-bushing boss; 3323—a limit bump; 333- -inner sleeve;

3331-inner sleeve notch; 3332-inner sleeve elastic part; 34- - -a stop;

341—a protruding arm; 342-a stop tab; 343-a stop block;

344—a first ramp; 35- - -locking spring; 36— a first retainer ring;

37- - -a second retainer ring; 38- - -a cage; 39- - -a code changing spring;

310- -a return spring; 320—a code searching knob; 3201-second ramp;

330—a rotation stop assembly; 3301-a rotation stop spring; 3302-a rotation stop block;

33021-second bevel; 3303-baffle; 33031-oblique bumps;

33032-first bevel; 3304-locking spring.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Accordingly, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship conventionally put in place when the inventive product is used, or the orientation or positional relationship conventionally understood by those skilled in the art, is merely for convenience in describing the embodiments of the present utility model, and is not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.

In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 20, the utility model discloses a coded lock, which comprises a lock body 1, a locking mechanism 2 and a character wheel mechanism 3, wherein the locking mechanism 2 and the character wheel mechanism 3 are arranged on the lock body 1;

the locking mechanism 2 is matched with the character wheel mechanism 3 to realize the locking and unlocking functions of the coded lock;

the locking mechanism 2 is in running fit with the lock body 1 and has a locked state and an unlocked state: the locking mechanism 2 can be switched between a locking state and an unlocking state when rotating;

the character wheel mechanism 3 comprises a code shaft 31, wherein the code shaft 31 is arranged opposite to the peripheral surface of the locking mechanism 2 and is used for limiting the rotation of the locking mechanism 2 so as to keep the locking state of the locking mechanism 2; when a user inputs a correct common code in the character wheel mechanism 3, the code shaft 31 can axially move and has no limit on the rotation of the locking mechanism 2, so that the locking mechanism 2 can be switched between a locked state and an unlocked state.

The following illustrates specific embodiments of the present utility model, and mainly discloses specific structures of the lock body 1, the locking mechanism 2, and the character wheel mechanism 3.

The specific structure of the lock body 1 is as follows:

the lock body 1 comprises a lock seat 11 and a cover plate 12 which are mutually covered; the lock seat 11 is provided with a mounting hole 111 for mounting the locking mechanism 2 and a mounting groove 112 for mounting the character wheel mechanism 3, the mounting hole 111 and the mounting groove 112 are arranged in parallel and are partially communicated, and the communication part is used for the password shaft 31 to penetrate; the cover plate 12 is provided with a movable hole 121 and a plurality of character wheel holes 122 corresponding to the mounting holes 111 and the mounting grooves 112 respectively.

Further, the lock base 11 is further provided with a locking groove 113 communicated with the mounting hole 111, and the locking groove 113 is used for placing an object to be locked; the locking mechanism 2 acts on the locking groove 113 to lock and unlock the lock.

Secondly, the tail end of the cover plate 12 is locked on the lock seat 11 through a screw 13, so as to realize the relative fixation of the lock seat 11 and the cover plate 12.

Moreover, the inner side of the cover plate 12 is provided with an anti-drilling sheet 14 to improve the performance of preventing the character wheel mechanism 3 from being opened violently.

The specific structure of the locking mechanism 2 is as follows:

the locking mechanism 2 comprises a switch knob 21, a rotating sleeve 22, a lock shaft 23 and an unlocking spring 24;

the switch knob 21 is coaxially connected with the rotating sleeve 22 and is in rotating fit in the lock body 1 (namely the mounting hole 111), and the rotating sleeve 22 can be driven to synchronously rotate when the switch knob 21 rotates;

the peripheral surface of the switch knob 21 is provided with a limit groove 211 which is opposite to the password shaft 31 of the character wheel mechanism 3, and the switch knob 21 cannot rotate when the password shaft 31 is inserted into the limit groove 211, namely the whole locking mechanism 2 cannot rotate;

the lock shaft 23 is in rotary fit in the rotary sleeve 22;

the inner wall of the swivel 22 is provided with a swivel boss 221, the swivel boss 221 is provided with a high point 221a and a low point 221b, and a transition line segment 221c is connected between the high point 221a and the low point 221 b;

the lock shaft 23 is provided with a lock shaft protrusion 231 provided opposite to the rotation sleeve protrusion 221 on the circumferential surface thereof;

the unlocking spring 24 is provided in the lock body 1 (i.e., the above-described mounting hole 111) and acts on the lock shaft 23;

under the action of the elastic force of the unlocking spring 24, the lock shaft convex part 231 abuts against the rotating sleeve convex part 221, so that when the rotating sleeve 22 rotates, the lock shaft 23 can realize the expansion and contraction of the end part of the lock shaft 23 in the locking groove 113 through the forward sliding movement of the lock shaft convex part 231 between the high point 221a and the low point 221b of the rotating sleeve convex part 221, and the locking mechanism 2 can be switched between the locking state and the unlocking state through the expansion and contraction of the lock shaft 23.

The locking mechanism 2 pushes the lock shaft 23 against the rotating sleeve 22 through the unlocking spring 24, and through the movable fit of the rotating sleeve convex part 221 of the rotating sleeve 22 and the lock shaft convex part 231 of the lock shaft 23, the lock shaft 23 can stretch and retract with small force to switch the locking state and the unlocking state of the locking mechanism 2 in the rotating process of the rotating sleeve 22, a user only needs to rotate the switch knob 21 with small force to drive the rotating sleeve 22 to rotate and enable the lock shaft convex part 231 to be separated from the low point 221b of the rotating sleeve convex part 221, the force of the lock shaft convex part 231 abutting against the transition line segment 221c can be converted into circumferential driving force for driving the rotating sleeve 22, and the end user can finish unlocking of the rotating switch knob 21 with small force, so that the operation is more labor-saving, and the unlocking process is smoother and more convenient.

In some embodiments of the locking mechanism 2, a plug structure is provided on the opposite surface of the switch knob 21 and the rotating sleeve 22. The switch knob 21, the rotating sleeve 22 and the split design are convenient for the production and assembly of product accessories, and coaxial connection can be realized between the switch knob 21 and the rotating sleeve 22 through the plug structure, so that the switch knob 21 can drive the rotating sleeve 22 to synchronously rotate.

Further, the above-mentioned plug structure includes a plurality of plug posts 212 disposed on the end surface of the switch knob 21, and a plurality of insertion holes 222 disposed on the end surface of the rotating sleeve 22 and matching with the plug posts 212.

In some embodiments of the locking mechanism 2, a guide hole 223 is provided on the axis of the rotating sleeve 22, one end of the lock shaft 23 facing the guide hole 223 is a guide shaft 232, and the guide shaft 232 is inserted into the guide hole 223, so as to maintain the axial movement of the lock shaft 23 in the rotating sleeve 22, and improve the functional stability of the lock shaft 23.

In some embodiments of the locking mechanism 2, the locking mechanism 2 further includes a locking tongue 25 disposed in the limit groove 211; the end of the code shaft 31 acts on the lock tongue 25 to realize the rotation stopping function of the lock mechanism 2.

Further, referring to fig. 1 and 17, the locking mechanism 2 further includes an insert 26 and a relief spring 27; the peripheral surface of the switch knob 21 is provided with a movable groove 213 communicated with the limit groove 211; the two ends of the movable groove 213 are respectively provided with a large opening 213a and a small opening 213b; the lock tongue 25 is movably fitted in the movable groove 213 and provided with a lock tongue protrusion 251 penetrating the small opening 213b, and a guide inclined surface 252 is provided on the locking side (the rotation direction when the switch knob 21 is locked) of the lock tongue protrusion 251; the insert 26 is fixedly connected at the large opening 213 a; the relief spring 27 is disposed between the lock tongue 25 and the insert 26, so that the lock tongue 25 is kept abutting against the inner side of the small opening 213b, and the lock tongue protrusion 251 protrudes from the small opening 213b for the combination shaft 31 to cooperate. Under the guiding action of the movable groove 213, the elasticity of the abdication spring 27 enables the lock tongue 25 to keep the state that the lock tongue convex part 251 of the lock tongue extends out, so that the lock tongue contacts with the end part of the coded shaft 31 in the rotating process of the switch knob 21, and the rotation stopping function of the coded shaft 31 on the lock tongue 25 and the switch knob 21 is realized; however, considering a situation, if the displayed code of the character wheel mechanism 3 is disturbed when the switch knob 21 rotates to the unlocking state, the code shaft 31 cannot move axially any more, and then if the switch knob 21 is rotated to the locking state, the problem that the lock tongue 25 contacts with the end of the code seat 31 and cannot return to the locking state (i.e. cannot be locked) occurs, and after the matching mode of the lock tongue 25 is improved in the mode described in this section, the lock tongue 25 is gradually extruded back into the movable groove 213 during the rotation process of the switch knob 21 when the code shaft 31 contacts with the guide inclined surface 252 due to the guide inclined surface 252 being provided on the lock tongue protrusion 251, so that the end of the code shaft 31 can pass over the lock tongue protrusion 251, that is, the switch knob 21 can rotate to the locking state.

Meanwhile, the locking mechanism 2 further comprises a C-shaped snap ring 28, and the snap ring 28 is sleeved on the peripheral surface of the switch knob 21, which is close to one end of the rotating sleeve 22, and is used for axially limiting the switch knob 21, so as to prevent the switch knob 21 from being separated from the lock body 1 (namely, the movable hole 121 of the cover plate 12), and realize the axial fixation of the switch knob 21 on the lock body 1.

The specific structure of the character wheel mechanism 3 is as follows:

the character wheel mechanism 3 is a double-password character wheel mechanism and is provided with a common password and a management password, wherein the common password is used for unlocking, and the management password is used for retrieving the common password when the user forgets the common password (namely, the common password is an unlocking password and the management password is a code searching password).

The character wheel mechanism 3 comprises a code shaft 31, a code seat 32, a character wheel assembly 33, a stop block 34 and a locking spring 35;

the cipher seat 32 is provided with a plurality of parallel character wheel grooves 321; a group of character wheel assemblies 33 are arranged in each character wheel groove 321;

the password shaft 31 is in sliding fit with the password seat 32 and sequentially penetrates through each character wheel assembly 33; a plurality of locking convex blocks 311 are arranged on the axial direction of the coded shaft 31, and each locking convex block 311 corresponds to a group of character wheel assemblies 33 respectively;

the print wheel assembly 33 includes a print wheel 331, a bushing 332, and an inner sleeve 333; the bush 332 is rotatably fitted on the code shaft 31, the inner wall of the bush is provided with an unlocking groove 3321 for sliding engagement of the locking lug 311, and the peripheral surface of the bush is provided with a bush protruding part 3322; the character wheel 331 and the inner sleeve 333 are sleeved on the bushing 332; the character wheel 331 and the bushing 332 are limited in the circumferential direction, and the character wheel 331 and the inner sleeve 333 are in elastic coupling relation, and the inner sleeve 333 can synchronously rotate with the character wheel 331 in an unlimited state, namely, the bushing 332 and the inner sleeve 333 synchronously rotate when the character wheel 331 is shifted; the inner sleeve 333 is provided with an inner sleeve notch 3331;

the stop block 34 can move in the axial direction parallel to the password shaft 31 and is provided with a convex arm 341 corresponding to the character wheel assembly 33; the protruding arm 341 is arranged on the code seat 32 in a penetrating way, and is provided with a stop protruding part 342 positioned on the circumferential track of the inner sleeve notch 3331 and a stop blocking part 343 positioned on the circumferential track of the bushing protruding part 3322: when the character wheel mechanism 3 inputs the management code and axially moves the stop block 34, the stop block convex part 342 is embedded in the inner sleeve notch 3331 so that the inner sleeve 333 is stopped from rotating, and when the character wheel 331 drives the bushing 333 to rotate so that the bushing convex part 3322 abuts against the stop block part 343, the number displayed by the character wheel 331 is the set common code;

the locking spring 35 acts on the code shaft 31 to maintain the locking projection 311 in a state of being disengaged from the bush 332 even though the code shaft 31 is in the locked state.

The character wheel mechanism 3 is characterized in that an inner sleeve 333 is arranged in the character wheel 331, and the inner sleeve 333 is movably matched with the character wheel 331 through an elastic coupling relationship; when the block convex part 342 of the block 34 is embedded in the inner sleeve notch 3331, the inner sleeve 333 is limited to rotate, and the character wheel 331 can only rotate in one direction, so that the bushing 332 can be driven to rotate until the bushing convex part 3322 abuts against the block blocking part 343, and the purpose of searching for a common password can be achieved; the double-password wheel mechanism 3 containing the common password and the management password does not need to additionally design an emergency lock core mechanism or a code searching mechanism, the structural design of the lockset is simpler and the cost is lower, and the common password can be quickly found out by inputting the management password, so that the lockset is easy to operate and high in efficiency.

In some embodiments of the character wheel mechanism 3, a character wheel engaging portion 3311 and an inner sleeve elastic portion 3332 are respectively provided between an inner circumferential surface of the character wheel 331 and an outer circumferential surface of the inner sleeve 333 to achieve elastic coupling therebetween. Specifically, the matching modes at least have the following two modes: firstly, the character wheel matching part 3311 is a ratchet tooth, the inner sleeve elastic part 3332 is an elastic arm, so that when searching codes (namely when the inner sleeve 333 is stopped rotating), the character wheel 331 can only rotate in one direction (clockwise) to search for a common code, and invalid operation can be avoided; secondly, the character wheel matching part 3311 is a clamping groove, the inner sleeve elastic part 3332 is an elastic bulge, so that the character wheel 331 can rotate bidirectionally during code searching, but can only search a common code when rotating clockwise, and the two parts only have differences in specific structure and operation, but have the basis of realizing the code searching function.

Further, the axis of the wheel 331 is provided with a coaxial bushing hole 3312 and an inner bushing hole 3313, and the bushing hole 3312 is circumferentially and limitedly sleeved on the circumferential surface of the bushing 332; the inner sleeve 333 is movably fitted in the inner sleeve hole 3313, and the side wall of the inner sleeve hole 3313 is provided with the above-mentioned character wheel fitting portion 3311.

Secondly, a plurality of lining caulking grooves 3314 are arranged on the side wall of the lining hole 3312 at equal angle intervals; at least one limiting protrusion 3323 is disposed on the peripheral surface of the bushing 332, the limiting protrusion 3323 is embedded in the bushing caulking groove 3314, the matching angle of the limiting protrusion 3323 in the bushing hole 3312 (i.e. the relative angle with the character wheel 331) determines the common password corresponding to the character wheel assembly 33, and the user drives the bushing 332 to rotate to input the common password when dialing the character wheel 331. Of course, when the stopper 34 does not limit the inner sleeve 333, the character wheel 331 can drive the inner sleeve 333 to rotate synchronously, and the management password is input while the character wheel 331 is shifted. In the related structure described below, when the bush 332 is separated from the character wheel 331, the bush 332 and the character wheel 331 no longer have a circumferential limiting relationship, and at this time, the ordinary password can be replaced by firstly poking the character wheel 331 and then nesting the bush 332 and the character wheel 331.

In some embodiments of the character wheel mechanism 3, the character wheel grooves 321 are disposed at equal angular intervals along the axial direction of the code wheel 32, so as to achieve that the character wheel assemblies 33 are arranged on the code wheel 32 at equal intervals.

In some embodiments of the character wheel mechanism 3, a first check ring 36 and a second check ring 37 are respectively installed at two ends of the code seat 32; the two ends of the password shaft 31 are respectively penetrated through the first check ring 36 and the second check ring 37 in a circumferential limit manner, so that the password shaft 31 can only axially move and cannot rotate under the action of external force, and the functional stability of the password shaft 31 can be improved; the two ends of the locking spring 35 are respectively abutted against the second check ring 37 and the end part of the coded shaft 31, and the elastic force of the locking spring 35 enables the coded shaft 31 to axially move towards the first check ring 36, so that the coded shaft 31 is in a locking state.

Further, the character wheel mechanism 3 further comprises a retainer 38 sleeved on the code shaft 31 and a code changing spring 39 sleeved on the second check ring 37; the first check ring 36 and the second check ring 37 are matched at the two outer ends of the retainer 38, and the bushings 332 at the two ends of the character wheel assembly 33 respectively abut against the two inner ends of the retainer 38; both ends of the code changing spring 39 are respectively abutted against the ends of the second check ring 37 and the retainer 38, and the elastic force of the code changing spring 39 enables the retainer 38 to push the first check ring 36 to be abutted against the peripheral surface of the locking mechanism 2 (namely the switch knob 21); the peripheral surface of the lock mechanism 2 (switch knob 21) is provided with a relief groove 214 in which the first retainer ring 36 is movably fitted. Referring to fig. 20, after the correct common code is input, the switch knob 21 can be reversely rotated (opposite to the unlocking direction) to a certain angle (for example, 60 ° in this embodiment), so that the relief groove 214 is opposite to the first check ring 36, and under the action of the code changing spring 39, the retainer 38, the bushing 332 and the first check ring 36 move towards the direction of the locking mechanism 2, after the first check ring 36 is embedded into the relief groove 214, the retainer 38 pushes the bushing 332 and disengages from the word wheel 331, at this time, the word wheel 331 can be rotated to set the common code, then the switch knob 21 is rotated to reset, and the switch knob 21 pushes the first check ring 36, the retainer 38 and the bushing 332 back, and the bushing 332 is coupled with the word wheel 331, so that the replacement of the common code is completed.

In some embodiments of the word wheel mechanism 3, the word wheel mechanism 3 further includes a return spring 310; the return spring 310 is disposed in the lock body 1 and acts on the stopper 34 to return the stopper 34 to a state of not contacting with the inner sleeve 333, that is, to make the stopper protrusion 342 exit the inner sleeve notch 3331, and the stopper 34 does not have a rotation stopping function on the inner sleeve 333.

In some embodiments of the character wheel mechanism 3, the character wheel mechanism 3 further includes a code searching knob 320; the code searching knob 320 is rotatably matched on the lock body 1 and is in transmission connection with the stop block 34, and the stop block 34 is pushed to axially move when the code searching knob 320 rotates, so that the function of searching for a common code (the detailed working principle is described below) is realized.

Further, a first slope 344 and a second slope 3201 are respectively disposed on opposite sides of the stop 34 and the code searching knob 320; the first ramp 344 is always abutted against the second ramp 3201 under the action of the return spring 310, so that when the code searching knob 320 is rotated, the code searching knob 320 can transmit torsion to the first ramp 344 through the second ramp 3201 and convert the torsion into axial driving force of the stop block 34, so that the stop block 34 moves axially parallel to the code shaft 31 at the bottom of the code seat 32.

In some embodiments of the character wheel mechanism 3, the first magnet 312 is embedded in the code shaft 31, the second magnet 3315 is embedded in each character wheel 331, and the character wheel 311 can automatically rotate by magnetic attraction between the first magnet 312 and the second magnet 3315, so as to realize automatic resetting of the current displayed code, and avoid code leakage.

Further, referring to fig. 1, 4, 14 and 15, the character wheel mechanism 3 further includes a rotation stopping assembly 330 acting on the character wheel 331, the elastic rotation stopping assembly 330 having a rotation stopping block 3302 extending and contracting by the action of a rotation stopping spring 3301, a baffle 3303 for movably limiting the rotation stopping block 3302, and a locking spring 3304; the surface of the character wheel 331 is provided with a plurality of rotation stopping grooves 3316, a rotation stopping block 3302 sequentially penetrates through the bottom of the baffle 3303 and the password seat 32 and is abutted against the surface of the character wheel 331 under the action of a rotation stopping spring 3301, and the rotation stopping block is movably and limitedly matched with the rotation stopping grooves 3316 after the character wheel 331 rotates, so that the rotation stopping function of a user after dialing the character wheel 331 is realized, and the currently-dialed password is maintained; the blocking plate 3303 is driven by the rotation of the locking mechanism 2 to axially move, for example, a push block 224 is arranged on the peripheral surface of the rotating sleeve 22, after unlocking, the locking mechanism 2 rotates and the push block 224 pushes the blocking plate 3303, the blocking plate 3303 pushes the rotation stopping block 3302 to compress the rotation stopping spring 3301, so that the rotation stopping block 3302 is separated from the rotation stopping groove 3316, and the character wheel 331 can be reset under the action of the first magnet 312 and the second magnet 3315 to realize the function of automatic code disorder after unlocking; the locking spring 3304 is used to drive the damper 3303 back so that the rotation stop spring 3301 can drive the rotation stop block 3302 to engage the rotation stop groove 3316.

Next, one end of the baffle 3303 is provided with an inclined bump 33031 for the push block 224 to movably contact; meanwhile, the contact position of the baffle 3303 and the rotation stop block 3302 is provided with a first inclined surface 33032 and a second inclined surface 33021 which are matched in a sliding way, so that the baffle 3303 can push and press the rotation stop block 3302 more smoothly.

The working principle of the utility model is as follows:

(1) locking state:

due to the elastic force of the locking spring 35, the code shaft 31 is kept protruding from the character wheel mechanism 3 and inserted into the locking mechanism 2 in a normal state, that is, the end part of the code shaft 31 is inserted into the limit groove 211 and is movably matched with the lock tongue convex part 251 of the lock tongue 25, when in a locking state, the code of the character wheel mechanism 3 is a messy code (incorrect common code), the code shaft 31 cannot be retracted, and therefore, when the switch knob 21 is rotated, the lock cannot rotate due to the fact that the lock tongue convex part 251 is abutted against the end part of the code shaft 31, so that the lock is kept in the locking state.

(2) And (3) unlocking:

when the character wheel 331 of each character wheel assembly 33 is shifted to the common password, the character wheel 331 drives the bushings 332 to rotate so that the unlocking grooves 3321 of each bushing 332 are aligned with each locking projection 311 on the password shaft 31, and at the moment, if the password shaft 31 is stressed, the locking springs 35 can be compressed to retract, so that when the switch knob 21 is rotated, the lock tongue 25 can squeeze the password shaft 31 to rotate from the locking state to the unlocking state; the switch knob 21 is rotated while the rotating sleeve 22 rotates synchronously, so that the relative angle between the rotating sleeve convex part 221 in the rotating sleeve 22 and the locking shaft convex part 231 of the locking shaft 23 is changed, the locking shaft 23 moves from the low point 221b to the high point 221a along the transition line segment 221c under the elastic force of the unlocking spring 24, the locking shaft 23 axially moves towards the direction of the switch knob 21, and the locking shaft 23 gradually withdraws from the locking groove 113, so that the unlocking of the lockset is completed.

(3) Searching for a common password:

referring to fig. 18 and 19, when a common password is required to be found, a management password is input first so that the inner sleeve notch 3331 of each inner sleeve 333 is opposite to the stop protrusion 342 of the stop 34; then, the code searching knob 320 is turned, the code searching knob 320 drives the stop block 34 to axially move, so that the stop block protrusion 342 is embedded into the inner sleeve notch 3331 to fix the inner sleeve 333, and at this time, the character wheel 331 can only rotate clockwise (based on clockwise direction in fig. 18 and 19) because the character wheel matching part 3311 (ratchet teeth) is coupled with the inner sleeve elastic part 3332 (spring arm) to have a limiting effect on the rotation of the character wheel 331; the user rotates the character wheel 331 until the bush convex portion 3322 of the bush 332 abuts against the stopper catch portion 343 of the stopper 34, the character wheel 331 cannot rotate any more and stops, and at this time, the number displayed by each character wheel 331 is the common code.

(4) Changing the common password:

when a correct common password is input, the switch knob 21 is rotated by 60 degrees anticlockwise, so that the abdication groove 214 is opposite to the first check ring 36, under the action of the code changing spring 39, the retainer 38, the bushing 332 and the first check ring 36 move towards the direction of the switch knob 21, after the first check ring 36 is embedded into the abdication groove 214, the retainer 38 pushes the bushing 332 and enables the bushing 332 to be separated from the character wheel 331, at the moment, the rotatable character wheel 331 sets the common password, then the switch knob 21 is rotated to reset, the switch knob 21 pushes the first check ring 36, the retainer 38 and the bushing 332 back, and the bushing 332 is coupled with the character wheel 331, so that the replacement of the common password is completed.

(5) Changing the management password:

when a correct common password is input, the switch knob 21 is rotated by 60 degrees anticlockwise, so that the yielding groove 214 is opposite to the first check ring 36, under the action of the code changing spring 39, the retainer 38, the bushing 332 and the first check ring 36 move towards the direction of the switch knob 21, and after the first check ring 36 is embedded into the yielding groove 214, the retainer 38 pushes the bushing 332 and enables the bushing 332 to be separated from the character wheel 331; then the character wheel 331 is rotated to input the management password, the code searching knob 320 is rotated to drive the stop block 34 to move, the stop block convex part 342 on the stop block 34 is inserted into the inner sleeve notch 3331 to fix the stop block convex part, and at the moment, the management password is set by the rotatable character wheel 331; finally, the code searching knob 320 and the switch knob 21 are turned back, the switch knob 21 pushes the first check ring 36, the retainer 38 and the bushing 332 back, and the bushing 332 is coupled with the character wheel 331 to complete the replacement of the management code.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (10)

1. The utility model provides a locking mechanism of trick lock which characterized in that:

the lock comprises a switch knob, a rotating sleeve, a lock shaft and an unlocking spring;

the switch knob is coaxially connected with the rotating sleeve and is rotationally matched in the lock body of the coded lock;

the peripheral surface of the switch knob is provided with a limit groove which is arranged opposite to the coded shaft of the coded lock;

the lock shaft is in rotary fit in the rotary sleeve;

the inner wall of the rotating sleeve is provided with a rotating sleeve convex part, the rotating sleeve convex part is provided with a high point and a low point, and a transition line segment is connected between the high point and the low point;

the peripheral surface of the lock shaft is provided with a lock shaft convex part which is arranged opposite to the rotating sleeve convex part;

the unlocking spring is arranged in the lock body of the coded lock and acts on the lock shaft;

under the action of the elasticity of the unlocking spring, the lock shaft protruding part is abutted against the rotating sleeve protruding part, so that the rotating sleeve can drive the lock shaft to stretch and retract when rotating, and the locking mechanism can be switched between the locking state and the unlocking state.

2. The lock mechanism of a combination lock as recited in claim 1, wherein:

the locking mechanism further comprises a lock tongue arranged in the limit groove; the coded shaft of the coded lock is movably matched with the lock tongue to realize the rotation stopping function of the locking mechanism.

3. The lock mechanism of a combination lock as recited in claim 2, wherein:

the locking mechanism further comprises an insert and a yielding spring; the periphery of the switch knob is provided with a movable groove communicated with the limit groove; the two ends of the movable groove are respectively provided with a large opening and a small opening; the lock tongue is movably matched in the movable groove and is provided with a lock tongue protruding part penetrating through the small opening, and the locking side of the lock tongue protruding part is provided with a guide inclined plane; the insert is fixedly connected to the large opening; the yielding spring is arranged between the lock tongue and the insert, so that the lock tongue is kept to be abutted against the inner side of the small opening.

4. The lock mechanism of a combination lock as recited in claim 2, wherein:

the locking mechanism further comprises a clamping ring sleeved on the peripheral surface of the switch knob, which is close to one end of the rotating sleeve, and the clamping ring axially limits the switch knob.

5. The lock mechanism of a combination lock as recited in claim 1, wherein:

and an inserting structure is arranged on the opposite surface of the switch knob and the rotating sleeve.

6. The lock mechanism of a combination lock as recited in claim 5, wherein:

the plug structure comprises a plurality of plug posts arranged on the end face of the switch knob and a plurality of jacks arranged on the end face of the rotating sleeve and matched with the plug posts.

7. The lock mechanism of a combination lock as recited in claim 1, wherein:

the axis of the rotating sleeve is provided with a guide hole, one end of the lock shaft facing the guide hole is a guide shaft, and the guide shaft penetrates through the guide hole.

8. A combination lock comprising a locking mechanism according to any one of claims 1 to 7, characterized in that:

the lock comprises a lock body, wherein the locking mechanism is installed in the lock body.

9. A combination lock according to claim 8, wherein:

the lock body comprises a lock seat and a cover plate which are mutually covered; the lock seat is provided with a mounting hole for mounting the locking mechanism and a locking groove communicated with the mounting hole; the cover plate is provided with a movable hole corresponding to the mounting hole; the lock shaft penetrates through the locking groove.

10. A combination lock according to claim 9, wherein:

the tail end of the cover plate is locked on the lock seat through a screw.

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