CN111663849A - Puzzle lock - Google Patents

Abstract

The invention belongs to the technical field of locks, and discloses a coded lock which comprises a lock head, a transmission piece and a lock tongue, wherein the lock head comprises a central shaft, a coded assembly, a deflector rod and a knob, one end of the central shaft is a head part, the other end of the central shaft is a tail part, the direction pointing to the tail part from the head part is a first direction, the coded assembly is sleeved outside the central shaft, the coded assembly blocks the central shaft from moving along the first direction in a locking state, the central shaft can move along the first direction in an unlocking state, the deflector rod extends along a second direction, the second direction is arranged at an angle with the first direction, one end of the deflector rod is connected with the transmission piece, the deflector rod can drive the lock tongue to reciprocate through the transmission piece to complete locking and unlocking, the knob is connected to the other end of the deflector rod, the side wall of the knob abuts against the head, the knob can rotate to drive the shifting lever to rotate. The coded lock does not need a power supply, and the cost can be reduced.

Description

Puzzle lock

Technical Field

The invention belongs to the technical field of locks, and particularly relates to a coded lock.

Background

The coded lock is one of locks, a series of numbers or symbols are used when the coded lock is unlocked, a key in the traditional sense is not needed, the type of the coded lock is intelligent or non-intelligent, the intelligent coded lock is controlled electronically, and the coded lock can be unlocked automatically by fingerprints, swiping a card or inputting a digital code; the non-intelligent coded lock does not need a power supply, and unlocking is realized by certain manual operation after the password is selected.

At present, the trick lock of door is mostly intelligent trick lock, including corresponding electronic product in the lock, needs the power supply all the time, and not only use cost is high, and manufacturing cost is also than higher, and the condition that can't unblank still can cause if take place to have a power failure takes place.

Therefore, a combination lock is needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a coded lock which does not need a power supply and can reduce the production cost and the use cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a trick lock, includes tapered end, driving medium and spring bolt, the tapered end includes:

a central shaft, one end of which is a head part and the other end of which is a tail part, wherein the direction from the head part to the tail part is a first direction;

the password assembly is sleeved outside the central shaft, the password assembly blocks the central shaft to move along a first direction in a locking state, and the password assembly can move along the first direction in an unlocking state;

the driving lever extends along a second direction, the second direction and the first direction are arranged at an angle, one end of the driving lever is connected to the transmission part, and the driving lever rotates to drive the lock tongue to reciprocate through the transmission part so as to complete locking and unlocking;

the knob is connected to the other end of the shifting rod, the side wall of the knob abuts against the head, the head blocks the knob from rotating in the locking state, and the knob can rotate in the unlocking state so as to drive the shifting rod to rotate.

Preferably, the knob includes a knob body, a long contact and a short contact, the knob body is connected to the shift lever, the long contact and the short contact are both connected to a side wall of the knob body, the short contact abuts against the head in the locked state, and the knob can rotate until the long contact abuts against the head in the unlocked state.

Preferably, the head portion is provided with an end surface groove, and the long contact and the short contact can abut against the end surface groove.

Preferably, the password lock further comprises a shell and a shell cover, the shell and the shell cover are buckled to form an accommodating cavity, the central shaft and the password assembly are arranged in the accommodating cavity, the knob penetrates through the shell cover, and the deflector rod penetrates through the shell.

Preferably, the password assembly includes a plurality of inner wheels and a plurality of password wheels, the inner wheels are rotatably sleeved on the central shaft, each password wheel is sleeved on one of the inner wheels, a sliding groove which is axially penetrated through is formed in an inner wall of the inner wheel, a plurality of clamping blocks which are spaced from each other are axially arranged on an outer wall of the central shaft, the plurality of clamping blocks are positioned on the same straight line, the clamping blocks can penetrate through the sliding groove, when the plurality of sliding grooves and the clamping blocks are positioned on the same straight line, the password assembly is in the unlocked state, and when at least one sliding groove and the clamping block are not positioned on the same straight line, the password assembly is in the locked state.

Preferably, the outer wall of the password wheel is provided with a plurality of different numbers in a ring mode, the shell cover is provided with a display opening, and the display opening is opposite to the password wheel so as to display the numbers.

Preferably, every two adjacent numbers on the password wheel are provided with a bar-shaped groove, the password assembly further comprises an elastic sheet, and the elastic sheet is connected to the shell and can be clamped in the bar-shaped grooves.

Preferably, a sliding cover is arranged on the outer side of the shell cover in a sliding manner and is used for covering the display opening.

Preferably, a plurality of mutually-spaced clamping protrusions are annularly distributed on the outer wall of the inner wheel, a plurality of clamping grooves are formed in the inner wall of the password wheel, the clamping grooves extend to the end portion, facing the head, of the password wheel, and the clamping protrusions can be clamped in the clamping grooves.

Preferably, the cipher assembly further comprises a changing block movably sleeved on the tail and abutted against the inner wheel.

The invention has the beneficial effects that:

according to the coded lock provided by the invention, the dial rod is driven to rotate by rotating the knob, the rotation of the dial rod is converted into the reciprocating motion of the lock tongue through the transmission piece, so that locking and unlocking are realized, the rotation of the knob is controlled through the coded assembly, when the coded assembly is in a locking state, the central shaft is prevented from moving along a first direction, and the knob cannot rotate because the side wall of the knob abuts against the head of the central shaft and the central shaft cannot move to reserve a rotating space of the knob, so that the aim of locking is fulfilled; when the password assembly is in an unlocked state, the central shaft can move along the first direction, so that the knob has enough rotating space, and at the moment, the driving lever is rotated forwards and reversely to realize locking and unlocking respectively. The coded lock provided by the invention does not need a power supply, and can reduce the production cost and the use cost.

Drawings

FIG. 1 is an exploded view of a lock cylinder provided by an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a lock cylinder provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a knob according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a central shaft provided in an embodiment of the present invention;

FIG. 5 is a schematic structural view of an inner wheel provided in accordance with an embodiment of the present invention;

FIG. 6 is a front view of a lock cylinder provided by an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a cipher wheel provided in an embodiment of the present invention.

In the figure:

1. a central shaft; 3. a deflector rod; 4. a knob; 5. a housing; 6. a shell cover; 7. a sliding cover;

11. a head portion; 12. a clamping block; 21. an inner wheel; 22. a password wheel; 23. a spring plate; 24. an elastic member; 25. a code change block; 41. a button body; 42. a long contact; 43. a short contact; 44. a protrusion; 51. a limiting plate; 61. a display port; 62. a limiting groove; 81. a bolt; 82. tightening the screw;

111. an end face groove; 211. a chute; 212. clamping convex; 213. a clamping part; 221. a strip-shaped groove; 222. a card slot; 251. and a limiting block.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" are to be construed broadly, e.g., as meaning both connected and disconnectable, mechanically and electrically, directly or indirectly via intermediate media, whether internal or external to the elements, or in any other relationship between the elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 and fig. 2, the present embodiment provides a combination lock, which includes a lock head, a transmission member, and a lock tongue, wherein the lock head includes a central shaft 1, a combination component, a shift lever 3, and a knob 4, one end of the central shaft 1 is a head 11, the other end is a tail, and a direction pointing from the head 11 to the tail is a first direction; the password component is sleeved outside the central shaft 1, the password component blocks the central shaft 1 to move along a first direction in a locking state, and the central shaft 1 can move along the first direction in an unlocking state; the deflector rod 3 extends along a second direction, the second direction and the first direction are arranged at an angle, one end of the deflector rod 3 is connected to the transmission part, and the rotation of the deflector rod 3 can drive the lock tongue to reciprocate through the transmission part so as to complete locking and unlocking; the knob 4 is connected to the other end of the shift lever 3, the side wall of the knob 4 abuts against the head 11, the head 11 blocks the knob 4 from rotating in a locking state, and the knob 4 can rotate in an unlocking state to drive the shift lever 3 to rotate.

According to the coded lock provided by the embodiment, the dial rod 3 is driven to rotate by rotating the knob 4, the rotation of the dial rod 3 is converted into the reciprocating motion of the lock tongue through the transmission piece, so that locking and unlocking are realized, the rotation of the knob 4 is controlled through the coded component, when the coded component is in a locking state, the central shaft 1 is prevented from moving along the first direction, and as the side wall of the knob 4 is abutted against the head 11 of the central shaft 1 and the central shaft 1 cannot move along the first direction to reserve a rotating space of the knob 4, the knob 4 cannot rotate, so that the purpose of locking is achieved; when the password assembly is in an unlocked state, the central shaft 1 can move along the first direction, so that the knob 4 has enough rotation space, and at the moment, the dial rod 3 is rotated forwardly and reversely to respectively realize locking and unlocking. The coded lock provided by the embodiment does not need a power supply, and can reduce the production cost and the use cost.

The trick lock that this embodiment provided still includes casing 5 and cap 6, and casing 5 and cap 6 lock joint mutually forms the holding chamber, and center pin 1 and password subassembly set up in the holding chamber, and 6 caps are worn to locate by knob 4, and casing 5 is worn to locate by driving lever 3. In this embodiment, the housing 5 and the housing cover 6 are connected together by bolts 81, which play a role in positioning and protecting the central shaft 1, the password assembly, the shift lever 3 and the knob 4. The second direction and the first direction are perpendicular to each other, namely the shift lever 3 is perpendicular to the central shaft 1, so that the shift lever 3 and the knob 4 are conveniently inserted.

The knob 4 can be any non-cylindrical structure, when the password assembly is in a locked state, a part of the side wall of the knob 4, which is closer to the rotation center line of the knob 4, abuts against the head 11, and when the password assembly rotates, the required rotating space is enlarged because the distance between the adjacent part and the rotation center line is larger, but the head 11 can not move along the first direction to block the rotation of the knob 4, so that the driving lever 3 can not be driven to rotate, and at the moment, locking and unlocking can not be carried out; when the combination is unlocked, the central shaft 1 can move in a first direction, and the knob 4 can rotate to lock and unlock.

As shown in fig. 1 and 3, the knob 4 includes a button body 41, a long contact 42 and a short contact 43, the button body 41 is connected to the shift lever 3, the long contact 42 and the short contact 43 are both connected to a side wall of the button body 41, the short contact 43 abuts against the head 11 in a locked state, and the knob 4 can drive the shift lever 3 to rotate and turn to the long contact 42 to abut against the head 11 in an unlocked state. In this embodiment, the long contact 42 and the short contact 43 are perpendicular to each other, the direction of rotation for retracting the lock tongue is set to be the direction from the short contact 43 to the long contact 42 through an included angle of 90 degrees, the direction for extending the lock tongue is opposite, when unlocking is performed, the code assembly is firstly turned to be in an unlocking state, the knob 4 is rotated, the short contact 42 is separated from the head 11, the long contact 42 abuts against the head 11 after 90 degrees of rotation, at the moment, the lock tongue is just retracted to realize unlocking, and when locking is required, the lock tongue is reversely rotated by 90 degrees. In order to limit the rotation range of the knob 4, two limiting columns (not shown in the figure) are arranged in the cover 6, and ensure that when the short contact 43 abuts against the head 11, one limiting column abuts against one side of the long contact 42, which is far away from the short contact 43, and when the long contact 42 abuts against the head 11, the other limiting column abuts against one side of the short contact 43, which is far away from the long contact 42.

Specifically, one end of the button body 41 has a larger diameter and is located outside the housing cover 6 for holding, the outer wall of the portion is provided with a plurality of protrusions 44 capable of increasing the friction force with the hand and facilitating the rotation thereof, the other end of the button body 41 has a smaller diameter, the side wall thereof is provided with the above-mentioned long contact 42 and short contact 43, and the portion is located inside the housing cover 6 and is rigidly connected to the shift lever 3 through the set screw 82.

As shown in fig. 4, the head 11 is formed with an end surface groove 111, and the long contact 42 and the short contact 43 can abut against the end surface groove 111. The end face slot 111 is provided to accurately define the range of rotation of the knob 4, when switching from the short contact 43 to the long contact 42 against the head 11, just to retract the bolt to complete unlocking, and conversely, when the short contact 43 is rotated into the end face slot 111, the bolt is extended to the longest state, and then the combination is adjusted to the locked state to complete locking.

As shown in fig. 1, 4 and 5, the password assembly includes a plurality of inner wheels 21 and a plurality of password wheels 22, the inner wheels 21 are rotatably sleeved on the central shaft 1, each password wheel 22 is sleeved on one of the inner wheels 21, a sliding groove 211 penetrating along the axial direction is formed in the inner wall of the inner wheel 21, a plurality of clamping blocks 12 spaced from each other are axially arranged on the outer wall of the central shaft 1, the plurality of clamping blocks 12 are located on the same straight line, the clamping blocks 12 can penetrate through the sliding groove 211, when the plurality of sliding grooves 211 and the clamping blocks 12 are located on the same straight line, the password assembly is in an unlocked state, and when at least one sliding groove 211 and the clamping block 12 are not located on the same straight line, the password assembly is in. In this embodiment, the inner wheel 21, the code wheel 22 and the fixture blocks 12 are all provided with four and are in one-to-one correspondence, when at least one sliding groove 211 and a plurality of fixture blocks 12 are not in the same straight line, the fixture block 12 corresponding to the sliding groove 211 which is not in the straight line causes a jam on the movement of the central shaft 1, so that the central shaft 1 cannot move, thereby hindering the rotation of the knob 4; when the plurality of sliding grooves 211 are positioned on the same straight line with the latch 12, the latch 12 can pass through the corresponding sliding groove 211 when the central shaft 1 moves, so that the knob 4 can rotate. The inside of casing 5 has a plurality of spacing limiting plates 51 that set up, and the both ends of every password wheel 22 all correspond and are provided with a limiting plate 51 for the axial position of restriction password wheel 22 guarantees that password wheel 22 is unchangeable in the position of casing 5.

Specifically, a plurality of different numbers are annularly arranged on the outer wall of the password wheel 22, a display opening 61 is formed in the shell cover 6, and the display opening 61 is opposite to the password wheel 22 so as to display the numbers. In this embodiment, the combination wheel 22 is provided with ten arabic numerals ranging from 0 to 9, and when all the sliding grooves 211 and the buckles 12 are located on the same straight line, the numerals displayed on the display port 61 are the combination of the combination lock. A display opening 61 is provided corresponding to one code wheel 22, as shown in fig. 6, each display opening 61 displays three numbers, the number in the middle is marked as a code in the present embodiment, assuming that the code assembly in fig. 6 is in an unlocked state, the code of the code lock is 0000, when the locked object is locked, the displayed number at the display opening 61 is disordered, and at this time, the sliding groove 211 and the buckle 12 are dislocated, thereby completing the locking.

As shown in fig. 1 and 7, a bar-shaped groove 221 is formed between every two adjacent numbers on the password wheel 22, the password assembly further comprises an elastic sheet 23, the elastic sheet 23 is connected to the shell 5, and the elastic sheet 23 can be clamped in the bar-shaped groove 221. The position of the elastic sheet 23 relative to the shell 5 is unchanged, the elastic sheet 23 is clamped in different strip-shaped grooves 221 along with the rotation of the password wheel 22, and the password wheel 23 can only dial one number at each time due to the arrangement of the structure, so that the relative position of the sliding groove 211 and the buckle 12 can be accurately controlled.

Optionally, a sliding cover 7 is slidably disposed on the outer side of the housing cover 6, and the sliding cover 7 is used for covering the display opening 61. In this embodiment, in the two of cap 6 and sliding closure 7, one has seted up the guide way, another is provided with the slider, the slider slides and sets up in the guide way, the sliding connection of the two has been realized, the terminal surface that sliding closure 7 is close to knob 4 is the semicircle face, the position that knob 4 is located outside cap 6 is cylindricly, the radius of semicircle face equals with cylindrical radius, when sliding closure 7 slides to hiding display port 61, the lateral wall of sliding closure 7 flushes with the terminal surface that knob 4 deviates from the one end of driving lever 3, and sliding closure 7 pastes and leans on a partial lateral wall of knob 4, make knob 4 unable rotation, therefore, sliding closure 7 not only plays the effect of protection code wheel 22, can also prevent when not needing the unblock, knob 4 receives other exogenic actions rotation and causes the damage to driving lever 3.

As shown in fig. 5 and 7, a plurality of mutually spaced locking protrusions 212 are circumferentially arranged on the outer wall of the inner wheel 21, a plurality of locking grooves 222 are formed on the inner wall of the password wheel 22, the locking grooves 222 extend to the end of the password wheel 22 facing the head, and the locking protrusions 212 can be locked in the locking grooves 222. The locking protrusion 212 is locked in the locking groove 222, so that the inner wheel 21 can be driven to rotate by rotating the password wheel 22, and the relative position of the sliding groove 211 and the buckle 12 can be adjusted to switch between the unlocking state and the locking state. One end of the clamping groove 222 penetrates through the end part of the password wheel 22 facing the head, and the other end is a clamping wall, so that the inner wheel 21 cannot move along the first direction relative to the password wheel 22, but can move along the direction opposite to the first direction for disconnecting the connection with the password wheel 22, and then the relative positions of the numbers on the password wheel 22 and the sliding grooves 211 on the inner wheel 21 are adjusted by rotating the password wheel 22, thereby completing the password modification. In this embodiment, an annular engaging portion 213 is disposed at an outer side of one end of the inner wheel 21 close to the head 11 to separate two adjacent combination wheels 22, so as to prevent the combination wheels 22 from affecting the adjacent combination wheels 22 when rotating. In order to ensure that the rotation of the inner wheel 21 is not influenced by the arrangement of the fixture block 12, the inner diameter of one end of the inner wheel 21 close to the head 11 is larger, the inner diameter of the other end of the inner wheel is smaller, the inner wall of the small diameter is attached to the side wall of the central shaft 1, the inner wall of the large diameter and the central shaft 1 form an accommodating space, the fixture block 12 is located in the accommodating space, a step surface is arranged at the position where the large diameter and the small diameter are connected, the step surface can be clamped with the fixture block 12, and the sliding groove 211 axially extends to the end face.

Specifically, the code assembly further comprises a code changing block 25, and the code changing block 25 is movably sleeved at the tail and abuts against the inner wheel 21. In this embodiment, four inner wheels 21 are sequentially sleeved on the central shaft 1, and every two adjacent inner wheels 21 abut against each other end to end, as shown in fig. 2, a movable slot is formed at the top end of the code changing block 25, the tail portion of the central shaft 1 is located in the sliding slot, a gap is formed between the tail portion and the slot bottom of the sliding slot, the top end of the code changing block 25 abuts against the inner wheel 21 located at the lowest position, the inner wheel 21 can be pushed to move upwards relative to the password wheel 22 by pressing the code changing block 25 upwards, and therefore the inner wheel 21 is separated from the password wheel 22 and used for password modification.

More specifically, the password assembly further includes an elastic member 24, the elastic member 24 is sleeved on the central shaft 1 and clamped between the head 11 and the uppermost inner wheel 21, the four inner wheels 21 move upwards under the pushing of the code changing block 25 to compress the elastic member 24, after the password wheel 22 rotates, the pressing of the code changing block 25 is removed, the four inner wheels 21 automatically reset under the action of the elastic member 24 and are sleeved with the password wheel 22 again, and the elastic member 24 may be a spring, a corrugated tube or other elastic component.

Optionally, the side wall of the code changing block 25 is further provided with a limiting block 251, the inner wall of the housing cover 6 is provided with a limiting groove 62, and the limiting block 251 is located in the limiting groove 62. The limiting block 251 and the limiting groove 62 cooperate to limit the movable range of the transposing block 25.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a coded lock, includes tapered end, driving medium and spring bolt, its characterized in that, the tapered end includes:

a central shaft (1) having a head (11) at one end and a tail at the other end, wherein the direction from the head (11) to the tail is a first direction;

the password assembly is sleeved outside the central shaft (1), the password assembly blocks the central shaft (1) from moving along a first direction in a locking state, and the central shaft (1) can move along the first direction in an unlocking state;

the driving lever (3) extends along a second direction, the second direction and the first direction are arranged in an angle mode, one end of the driving lever (3) is connected to the transmission piece, and the driving lever (3) rotates and can drive the lock tongue to move back and forth through the transmission piece so as to complete locking and unlocking;

the knob (4) is connected to the other end of the shifting rod (3), the side wall of the knob (4) abuts against the head (11), the head (11) blocks the knob (4) from rotating in the locking state, and the knob (4) can rotate in the unlocking state to drive the shifting rod (3) to rotate.

2. Coded lock according to claim 1, characterized in that said knob (4) comprises a knob body (41), a long contact (42) and a short contact (43), said knob body (41) being connected to said toggle lever (3), said long contact (42) and said short contact (43) being both connected to a side wall of said knob body (41), said short contact (43) abutting against said head (11) in said locked condition, and said knob (4) being rotatable until said long contact (42) abuts against said head (11) in said unlocked condition.

3. Coded lock according to claim 2, characterized in that said head (11) is provided with a face groove (111), said long contact (42) and said short contact (43) being able to abut in said face groove (111).

4. The coded lock according to claim 1, characterized by further comprising a housing (5) and a housing cover (6), wherein the housing (5) and the housing cover (6) are buckled to form an accommodating cavity, the central shaft (1) and the coded components are arranged in the accommodating cavity, the knob (4) is arranged in the housing cover (6) in a penetrating manner, and the deflector rod (3) is arranged in the housing (5) in a penetrating manner.

5. The combination lock of claim 4, wherein the combination assembly comprises a plurality of inner wheels (21) and a plurality of combination wheels (22), the inner wheel (21) is rotatably sleeved on the central shaft (1), each password wheel (22) is sleeved on one inner wheel (21), the inner wall of the inner wheel (21) is provided with a sliding groove (211) which is through along the axial direction, the outer wall of the central shaft (1) is provided with a plurality of clamping blocks (12) which are spaced from each other along the axial direction, the clamping blocks (12) are positioned on the same straight line, and the clamping blocks (12) can penetrate through the sliding groove (211), when the sliding grooves (211) and the clamping blocks (12) are positioned on the same straight line, the code assembly is in the unlocking state, when at least one sliding groove (211) is not in the same straight line with the clamping block (12), the code assembly is in the locking state.

6. The coded lock according to claim 5, characterized in that a plurality of different numbers are annularly arranged on the outer wall of the coded wheel (22), a display opening (61) is formed in the shell cover (6), and the display opening (61) is opposite to the coded wheel (22) so as to display the numbers.

7. The coded lock according to claim 6, characterized in that a bar-shaped groove (221) is formed between every two adjacent numbers on the coded wheel (22), the coded assembly further comprises an elastic sheet (23), and the elastic sheet (23) is connected to the shell (5) and can be clamped in the bar-shaped groove (221).

8. Coded lock according to claim 6, characterized in that a sliding cover (7) is slidingly arranged on the outside of the housing cover (6), the sliding cover (7) being used to cover the display opening (61).

9. The coded lock according to claim 5, characterized in that a plurality of mutually spaced clamping protrusions (212) are annularly distributed on the outer wall of the inner wheel (21), a plurality of clamping grooves (222) are formed on the inner wall of the code wheel (22), the clamping grooves (222) extend to the end part, facing the head part (11), of the code wheel (22), and the clamping protrusions (212) can be clamped in the clamping grooves (222).

10. The combination lock of claim 9, wherein the combination assembly further comprises a change block (25), the change block (25) being movably sleeved on the tail and abutting against the inner wheel (21).

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