CN212507781U

CN212507781U - Mechanical coded lock incapable of obtaining password through mechanical comparison method

Info

Publication number: CN212507781U
Application number: CN201922195346.2U
Authority: CN
Inventors: 鲁江涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2021-02-09
Anticipated expiration: 2029-12-10

Abstract

A mechanical coded lock incapable of obtaining a password through a mechanical contrast method comprises a main shaft, wherein a password wheel, a password input device and a clutch ring are arranged on the main shaft in a penetrating mode, the password wheel can be matched with a lock plate or an opening plate, the clutch ring is connected with a square shaft, and a rack is arranged on the other side of the lock plate and meshed with a gear shaft; when the lock is unlocked, the locking pin on the locking plate needs to be inserted into the code groove or the locking groove of the code wheel, the code wheel and the code input device are fixed, then the code pin on the unlocking plate is tried to be inserted into the code groove on the code wheel, if the code pin is inserted into the code groove, the code lock can be unlocked, and the code pin cannot be inserted into the locking groove due to the difference of the length of the code groove and the length of the locking groove, so that the lock cannot be cracked by a mechanical contrast method; the utility model drives the clutch ring through the square shaft, the clutch ring drives the password wheel to move along the main shaft, when the password wheel is meshed with the password input device, the password wheel can be separated from the password input device by horizontal movement and freely rotates, and the password can be reset at the moment; the utility model relates to a design concept is ingenious, has the characteristics that the security is high, the practicality is good.

Description

Mechanical coded lock incapable of obtaining password through mechanical comparison method

Technical Field

The utility model belongs to a mechanical lock, in particular to mechanical trick lock that can't break to obtain the password through mechanical contrast method.

Background

In life, in order to improve the anti-theft performance of a mechanical lock, a password mechanism is often arranged in the mechanical lock, and the lock can be mechanically unlocked only after a password is input correctly.

The principle of the mechanical coded lock is that a code groove and a code pin which are matched with each other are arranged between a code wheel and a lock pin, the code groove rotates along with the code wheel, the code pin moves along with the lock pin, when the code groove is aligned with the code pin, the lock pin can move in place, and at the moment, a lock tongue can be opened by an opening mechanism;

the existing mechanical coded lock mainly has two types of secret breaking means: the first is known by scanning the mechanism inside the lock with rays; the second is through carrying out the action of unblanking, make the password unit in the state of comparing, compare the state and be in the action in-process that opens and the password wheel has obstructed the state of further operation of lockpin, if the password is with the password round pin stagger, the lockpin can not move in place, the spring bolt can not be opened, then make drive password wheel pivoted drive wheel rotate through password input device, the drive wheel drives the password wheel and rotates to the correct password position, when the password groove aligns with the password round pin, can hear the change of obvious action sound of aligning or perception lockpin position, thereby learn the password. We refer to the second means of breaking secret as mechanical alignment.

The first type of tamper can be solved by providing a coating in the lock that prevents the passage of radiation; for the mechanical comparison method, an effective cracking method which does not affect the normal use of the lock is not available at present.

Meanwhile, most of the coded locks on the market need to disassemble the lock body to different degrees when the codes are modified, which is a defect of the traditional mechanical lock.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide an unable mechanical trick lock of breaking the password through mechanical contrast method, can prevent to break the password through mechanical contrast method, have safe and reliable, practical characteristics.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a mechanical coded lock incapable of obtaining codes through a mechanical comparison method comprises a lock box which is enclosed by a first side plate 36a and a second side plate 36b at two sides, a bottom plate 37, a back plate 38 and a cover plate 39 which are arranged between the first side plate 36a and the second side plate 36b, wherein a code window 49 is arranged on the cover plate 39;

a first mounting hole 34a is formed in the first side plate 36a, a second mounting hole 34b is formed in the corresponding position of the second side plate 36b, a main shaft 12 is arranged between the first mounting hole 34a and the second mounting hole 34b, a plurality of password wheels 2 and clutch rings 19 with the number being more than that of the password wheels 2 penetrate through the main shaft 12, and a password groove 3 and a locking groove 10 are formed in one side of each password wheel 2; each password wheel 2 is sleeved with a password input device 1, top teeth 46 are uniformly distributed on one side of the password input device 1, inner teeth 47 are arranged on the inner ring of the password input device 1, and the inner teeth 47 can be meshed with outer teeth 48 on the periphery of the password wheel 2; meanwhile, the password input device 1 is also arranged in a password input device installation groove 44, one part of the password input device installation groove 44 is arranged on the bottom plate 37, the other part of the password input device installation groove 44 is arranged on the cover plate 39, the password input device installation groove 44 is arranged between two adjacent clutch rings 19, a third sliding groove 25 is arranged on the clutch rings 19, a fixed block 20, a spring 22 and a movable block 21 are sequentially arranged in the third sliding groove 25 from one end to the other end, the fixed block 20 is connected with the movable block 21 through the spring 22, and the movable block 21 is matched with two adjacent top teeth 46 at the concave positions of the movable block and the two adjacent top teeth 46;

a first mounting groove 33a is formed in the first side plate 36a, a second mounting groove 33b is formed in the second side plate 36b, a first sliding groove 23a is formed in the first mounting groove 33a, a second sliding groove 23b is formed in the position, corresponding to the second mounting groove 33b, of the second mounting groove, and a locking plate 4 and a locking plate 8 are arranged between the first sliding groove 23a and the second sliding groove 23 b; a first limiting groove 15 and a locking plate handle 40 are arranged on one side of the locking plate 8, a locking hole 9 is formed in the plate surface of the locking plate 4, and a plurality of coded pins 14 are arranged on the other side of the locking plate; a through stroke hole 26 is formed in the locking plate 4, a second limiting groove 16 is formed in one side of the locking plate 4, a plurality of locking pins 5 are arranged on the other side of the locking plate 4, and a first rack 28a and a second rack 28b are respectively arranged on one side of the locking plate 4 and on two sides of the stroke hole 26 along the length direction of the stroke hole 26;

the locking mechanism is characterized in that a third mounting hole 35a is formed in the first side plate 36a, a fourth mounting hole 35b is formed in the second side plate 36b, a gear shaft 11 is arranged between the third mounting hole 35a and the fourth mounting hole 35b, the gear shaft 11 is located below the locking plate 4, two sides of a tooth type of a tooth portion of the gear shaft 11 are respectively meshed with the first rack 28a and the second rack 28b on the other side of the locking plate 4, the middle of the tooth type of the tooth portion of the gear shaft 11 is meshed with the locking rack 6, the back of the locking rack 6 is a lifting locking pin 7 integrated with the locking rack 6, the locking rack 6 is arranged in the fourth sliding groove 29, and the fourth sliding groove 29 is fixed on the bottom plate 37.

A third sliding groove 25 is arranged on the clutch ring 19, and a first pin hole 27 is arranged on the extending part of the clutch ring 19; the clutch ring 19 is connected with a fixing groove 30 on the square shaft 17 through a first pin hole 27, the square shaft 17 is arranged in a fifth sliding groove 32 on the bottom plate, a limiting plate fastening groove 31 is arranged at the tail part of the square shaft 17, and a limiting plate 18 is fixed in the limiting plate fastening groove 31; the square shaft handle 42 of the square shaft 17 extends from the second extending hole 43 of the bottom plate 37.

Each of the code grooves 3 and the locking grooves 10 is sandwiched between adjacent two of the square teeth 55.

The code groove 3 is longer than the locking groove 10 than the code groove 3 is to the locking groove 10.

The code groove 3 is flush with the locking groove 10 at the end remote from the end face of the code wheel 2 to which it belongs.

The latch plate handle 40 extends from a first extension aperture 41 in the back plate 38.

The outer ring of the password input device 1 is printed or engraved with numbers.

The locking plate 4 is arranged below the locking plate 8, and the locking pin 5 on the locking plate 4 and the cipher pin 14 on the locking plate 8 are positioned at the same horizontal height.

The clutch ring 19 comprises a clutch ring inner cylinder 50 and a clutch ring outer cylinder 51, and the clutch ring inner cylinder 50 and the clutch ring outer cylinder 51 are disconnected at a gap 54; the clutch ring outer cylinder 51 is also divided into two parts by the third sliding groove 25; the length of the clutch ring inner cylinder 50 is greater than that of the clutch ring outer cylinder 51, and the clutch ring inner cylinder 50 protrudes relative to two sides of the clutch ring outer cylinder 51, wherein one protruding side is a clutch ring first flange 52, and the other protruding side is a clutch ring second flange 53; the second flange 53 of the clutch ring can push the password wheel 2 away from the original position only when the password lock is in an open state and the square shaft 17 moves to the limit position, so that the password wheel 2 is disengaged from the password input device 1, and the second flange 53 of the clutch ring also returns to the original position in other states or after the square shaft 17 returns to the original position, so that the password input device 1 is re-engaged with the password wheel 2.

The utility model has the advantages that: because the locking plate 4 is added, the locking plate 4 must be used to fix the position states of the password input device 1 and the password wheel 2 before unlocking is attempted, so that the password input device 1 can be prevented from being rotated while someone tries to unlock, and the password can be effectively prevented from being broken through a mechanical comparison method; because the square shaft 17 and the clutch ring 19 are fixed, the clutch ring 19 can drive the password input device 1 to move, so that the password input device 1 can be separated from the password wheel 2 without opening a lock box of the lock, and the password is modified.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a diagram showing the operation state of the present invention during locking.

Fig. 3 is a working state diagram of the unlocking operation when the password input is wrong.

Fig. 4 is a working state diagram of the unlocking operation when the password input is correct.

Fig. 5 is a working state diagram of the present invention before password modification in a state where the cover plate 39, the lock plate 4, and the lock plate 8 are hidden.

Fig. 6 is a working state diagram of the password input device 1 and the password wheel 2 when the password is modified.

Fig. 7 is a longitudinal sectional view of the present invention.

Fig. 8 is a schematic configuration diagram of the password input device 1.

Fig. 9 is a schematic view of the structure of code wheel 2.

Fig. 10 is a schematic structural view of the lock plate 8.

Fig. 11 is a schematic structural view of the front surface of the lock plate 4.

Fig. 12 is a schematic structural view of the back surface of the lock plate 4.

Fig. 13 is a schematic structural view of the square shaft 17.

Fig. 14 is a schematic structural axial view of the clutch ring 19.

Fig. 15 is another axial side view of the structure of the clutch ring 19.

In the figure: 1. a password input device; 2. a password wheel; 3. a cryptographic slot; 4. a lock plate; 5. A locking pin; 6. a locking rack; 7. a lift lock pin; 8. a lock plate; 9. a locking hole; 10. A locking groove; 11. a gear shaft; 12. a main shaft; 13. a handle; 14. a code pin; 15. a first limit groove; 16. a second limit groove; 17. a square shaft; 18. a limiting plate; 19. a clutch ring; 20. A stator; 21. marbles; 22. a spring; 23a, a first chute; 23b, a second chute; 24. Fastening a pin; 25. a third sliding groove; 26. a travel hole; 27. a first pin hole; 28a, a first rack; 28b, a second rack; 29. a fourth chute; 30. fixing grooves; 31. a limiting plate fastening groove; 32. a fifth chute; 33a, a first mounting groove; 33b, a second mounting groove; 34a, a first mounting hole; 34b, a second mounting hole; 35a, a third mounting hole; 35b, a fourth mounting hole; 36a, a first side plate; 36b, a second side plate; 37. a base plate; 38. a back plate; 39. a cover plate; 40. a locking plate handle; 41. a first outlet hole; 42. a square shaft handle; 43. a second outlet aperture; 44. a password input device mounting groove; 45. a second pin hole; 46. a top tooth; 47. internal teeth; 48. an outer tooth; 49. a password window; 50. an inner clutch barrel; 51. a clutch outer cylinder; 52. A clutch ring first flange; 53. a clutch ring second flange; 54. opening the gap; 55. and (4) square teeth.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, 2, 4 and 5, a mechanical combination lock which cannot obtain a combination through a mechanical comparison method comprises a lock box which is enclosed by a first side plate 36a and a second side plate 36b at two sides, a bottom plate 37 arranged between the first side plate 36a and the second side plate 36b, a back plate 38 and a cover plate 39, wherein a combination window 49 is arranged on the cover plate 39;

a first mounting hole 34a is formed in the first side plate 36a, a second mounting hole 34b is formed in the corresponding position of the second side plate 36b, a main shaft 12 is arranged between the first mounting hole 34a and the second mounting hole 34b, a plurality of password wheels 2 and clutch rings 19 with the number being more than that of the password wheels 2 penetrate through the main shaft 12, and a password groove 3 and a locking groove 10 are formed in one side of each password wheel 2; each password wheel 2 is sleeved with a password input device 1, top teeth 46 are uniformly distributed on one side of the password input device 1, inner teeth 47 are arranged on the inner ring of the password input device 1, and the inner teeth 47 can be meshed with outer teeth 48 on the periphery of the password wheel 2; meanwhile, the code input device 1 is also arranged in a code input device installation groove 44, one part of the code input device installation groove 44 is arranged on the bottom plate 37, the other part of the code input device installation groove 44 is arranged on the cover plate 39, and the position of the code input device installation groove 44 is arranged between two adjacent clutch rings 19.

Referring to fig. 1, 2, 5, 10, 11 and 12, a first mounting groove 33a is formed in the first side plate 36a, a second mounting groove 33b is formed in the second side plate 36b, a first sliding groove 23a is formed in the first mounting groove 33a, a second sliding groove 23b is formed in a position corresponding to the second mounting groove 33b, and a locking plate 4 and a locking plate 8 are arranged between the first sliding groove 23a and the second sliding groove 23 b; a first limiting groove 15 and a locking plate handle 40 are arranged on one side of the locking plate 8, a locking hole 9 is formed in the plate surface of the locking plate 8, and a plurality of coded pins 14 are arranged on the other side of the locking plate; be equipped with the stroke hole 26 that link up on the lock plate 4, lock plate 4 one side is equipped with second spacing groove 16, and the opposite side is equipped with a plurality of lock round pin 5, and lock plate 4 one side is equipped with first rack 28a and second rack 28b respectively along stroke hole 26 length direction in stroke hole 26 both sides.

Referring to fig. 1, 2, 5 and 7, a third mounting hole 35a is formed in the first side plate 36a, a fourth mounting hole 35b is formed in the second side plate 36b, a gear shaft 11 is disposed between the third mounting hole 35a and the fourth mounting hole 35b, the gear shaft 11 is located below the lock plate 4, a handle 13 is disposed at one end of the gear shaft 11 extending out of the second side plate 36b, both sides of a toothed portion of the gear shaft 11 are engaged with the first rack 28a and the second rack 28b on the other side of the lock plate 4, a middle part of the toothed portion of the gear shaft 11 is engaged with the lock rack 6, a back part of the lock rack 6 is the lock pin 7 which ascends and descends integrally with the lock rack 6, the lock rack 6 is disposed in the fourth sliding chute 29, and the fourth sliding chute 29 is fixed to the bottom plate 37.

Referring to fig. 4 and 14, the clutch ring 19 is provided with a third sliding groove 25, and the protruding part of the clutch ring 19 is provided with a first pin hole 27; the clutch ring 19 is connected with a fixing groove 30 on the square shaft 17 through a first pin hole 27, the square shaft 17 is arranged in a fifth sliding groove 32 on a bottom plate 37, a limiting plate fastening groove 31 is arranged at the tail part of the square shaft 17, and a limiting plate 18 is fixed in the limiting plate fastening groove 31; the square shaft handle 42 of the square shaft 17 extends from the second extending hole 43 of the bottom plate 37.

Referring to fig. 4 and 14, the third sliding groove 25 is provided with a fixed block 20, a spring 22 and a movable block 21 in sequence from one end to the other end, the fixed block 20 is connected with the movable block 21 through the spring 22, and the movable block 21 is matched with two adjacent top teeth 46 at the concave position of the movable block.

Referring to fig. 5, 8 and 14, the top teeth 46 will disengage from the clutch ring first flange 52 of the clutch ring 19 only during code modification; the top teeth 46 engage the clutch ring first flange 52 during the remaining normal operating conditions.

Referring to fig. 1, 2 and 7, the latch plate handle 40 extends from a first extension aperture 41 in the back plate 38.

Referring to fig. 2, the locking plate 4 is below the locking plate 8, and the locking pin 5 on the locking plate 4 and the cipher pin 14 on the locking plate 8 are located at the same level.

Referring to fig. 8, the outer circumference of the password input apparatus 1 is printed or engraved with numbers.

Referring to fig. 9, each of the code grooves 3 and the locking grooves 10 is sandwiched between two adjacent square teeth 55; compared with the locking groove 10, the code groove 3 has a length larger than that of the locking groove 10; the code groove 3 is flush with the locking groove 10 at the end remote from the end face of the code wheel 2 to which it belongs.

Referring to fig. 5, 6, 14 and 15, the clutch ring 19 includes a clutch ring inner cylinder 50 and a clutch ring outer cylinder 51, and both the clutch ring inner cylinder 50 and the clutch ring outer cylinder 51 are disconnected at a gap 54; the clutch ring outer cylinder 51 is also divided into two parts by the third sliding groove 25; the length of the clutch ring inner cylinder 50 is greater than that of the clutch ring outer cylinder 51, and the clutch ring inner cylinder 50 is relatively protruded relative to two sides of the clutch ring outer cylinder 51, wherein one protruded side is a clutch ring first flange 52, and the other protruded side is a clutch ring second flange 53; the first flange 52 of the clutch ring is partially or completely disengaged from the top teeth 46 only in the state that the combination lock is opened and the square shaft 17 moves from one end of the second extension hole 43 to the other end, and returns to the engagement with the top teeth 46 in other states or when the square shaft 17 returns to one end of the second extension hole 43; the second flange 53 of the clutch ring only enables the combination wheel 2 to be disengaged from the combination input device 1 when the combination lock is in an open state and the square shaft 17 moves from one end of the second extending hole 43 to the other end, and enables the combination wheel 2 to be engaged with the combination input device 1 again when the square shaft 17 returns to one end of the second extending hole 43 in other states.

Referring to fig. 1, the first side plate 36a and the second side plate 36b are all connected with the bottom plate 37, the back plate 38 and the cover plate 39 through mortise and tenon joints; the bottom plate 37 and the cover plate 39 are also in mortise and tenon connection.

Referring to fig. 2, the working principle of the present invention is: when the coded lock is in a locking state, the limiting plate 18 is positioned in the first limiting groove 15 and the second limiting groove 16, the locking rack 6 and the lifting locking pin 7 are positioned in the locking hole 9, and the locking plate 8 cannot move at the moment; the handle 13 is rotated, the gear on the gear shaft 11 drives the locking rack 6 to move downwards, the lifting locking pin 7 synchronously moves downwards along with the locking rack 6, and meanwhile, the gear is meshed with the first rack 28a and the second rack 28b to start to move and drive the locking plate 4 to move; after this process is completed, the locking rack 6 and the lift locking pin 7 are completely withdrawn from the locking hole 9, and the relative positions of the locking rack 6 and the lift locking pin 7 in the stroke hole 26 are changed due to the movement of the locking plate 8; at this point the locking plate 8 can move, but the code input device 1 and the code wheel 2 are not yet able to move.

Referring to fig. 2, 3 and 4, when the combination lock is in a locked state, namely locking is performed, and the first limiting groove 15 and the second limiting groove 16 on the locking plate 8 and the locking plate 4 are clamped with the limiting plate 18, the unlocking operation is performed in the state as follows, in the first step, the four combination input devices 1 are shifted to input correct combination; secondly, the handle 13 is rotated to drive the gear shaft 11 to rotate, so that the locking rack 6 meshed with the gear shaft 11 moves downwards, and the first rack 28a and the second rack 28b meshed with the gear shaft 11 drive the locking plate 8 to move towards the locking groove 10 until the locking pin 5 on the locking plate 8 is completely inserted into the locking groove 10 or the code groove 3; and in the third step, the locking plate handle 40 is pushed, if the locking pin 14 is inserted into the code groove 3 in the second step, the code pin 14 can be inserted into the code groove 3, the code lock can be unlocked, and if the locking pin 14 is inserted into the locking groove 10 in the second step, the code pin 14 cannot be inserted into the code groove 3, the code lock cannot be unlocked.

Referring to fig. 5 and 6, if a password is to be changed, the password lock needs to be unlocked according to the above steps, and then the following steps are executed, in the first step, the square shaft handle 42 is shifted to the extreme position and is kept still, at this time, the square shaft 17 drives the clutch ring 19 to move, the second flange 53 of the clutch ring 19 pushes the password wheel 2 to separate from the password input device 1, so that the password input device 1 can rotate freely, and at this time, the password input device 1 rotates without driving the password wheel 2 to rotate; secondly, rotating all the password input devices 1 to obtain the desired password; and thirdly, returning the square shaft handle 42 to the original position, and simultaneously returning the square shaft 17, the clutch ring 19 and the password input device 1 to the original position to finish password modification.

Referring to fig. 5 and 8, due to the presence of the spring 22 and the pins 21 of the stator 20 and the positional relationship between the top teeth 46 and the inner teeth 47 on the combination input device 1, and the positional relationship between the inner teeth 47 and the outer teeth 48, the combination grooves 3 and the locking grooves 10 on the combination wheel 2, when the top teeth 46 are in a stable position, i.e., when the pins 21 are located in the recesses of two adjacent top teeth 46, the locking pin 5 is exactly aligned with the locking grooves 10 or the combination grooves 3; the code pin 14 is aligned exactly with the code slot 3 if the code is now correctly entered.

Claims

1. A mechanical coded lock incapable of obtaining codes through a mechanical comparison method comprises a lock box which is enclosed by a first side plate (36a) and a second side plate (36b) on two sides, a bottom plate (37), a back plate (38) and a cover plate (39) which are arranged between the first side plate (36a) and the second side plate (36b), and a code window (49) is arranged on the cover plate (39); it is characterized in that the preparation method is characterized in that,

a first mounting hole (34a) is formed in the first side plate (36a), a second mounting hole (34b) is formed in the corresponding position of the second side plate (36b), a main shaft (12) is arranged between the first mounting hole (34a) and the second mounting hole (34b), a plurality of password wheels (2) and clutch rings (19) with the number larger than that of the password wheels (2) penetrate through the main shaft (12), and a password groove (3) and a locking groove (10) are formed in one side of each password wheel (2); each password wheel (2) is sleeved with a password input device (1), top teeth (46) are uniformly distributed on one side of each password input device (1), inner teeth (47) are arranged on the inner ring of each password input device (1), and the inner teeth (47) can be meshed with outer teeth (48) on the periphery of each password wheel (2); meanwhile, the password input device (1) is also arranged in a password input device mounting groove (44), one part of the password input device mounting groove (44) is arranged on the bottom plate (37), the other part of the password input device mounting groove is arranged on the cover plate (39), the password input device mounting groove (44) is arranged between two adjacent clutch rings (19), a third sliding groove (25) is arranged on the clutch rings (19), a fixed block (20), a spring (22) and a movable block (21) are sequentially arranged in the third sliding groove (25) from one end to the other end, the fixed block (20) is connected with the movable block (21) through the spring (22), and the movable block (21) is matched with two adjacent top teeth (46) at the concave positions of the movable block (21);

a first mounting groove (33a) is formed in the first side plate (36a), a second mounting groove (33b) is formed in the second side plate (36b), a first sliding groove (23a) is formed in the first mounting groove (33a), a second sliding groove (23b) is formed in the corresponding position of the second mounting groove (33b), and a locking plate (4) and a locking plate (8) are arranged between the first sliding groove (23a) and the second sliding groove (23 b); a first limiting groove (15) and a locking plate handle (40) are arranged on one side of the locking plate (8), a locking hole (9) is formed in the plate surface of the locking plate (4), and a plurality of coded pins (14) are arranged on the other side of the locking plate; a through stroke hole (26) is formed in the locking plate (4), a second limiting groove (16) is formed in one side of the locking plate (4), a plurality of locking pins (5) are arranged on the other side of the locking plate, and a first rack (28a) and a second rack (28b) are respectively arranged on one side of the locking plate (4) and on two sides of the stroke hole (26) along the length direction of the stroke hole (26);

be equipped with third mounting hole (35a) on first curb plate (36a), be equipped with fourth mounting hole (35b) on second curb plate (36b), be equipped with gear shaft (11) between third mounting hole (35a) and fourth mounting hole (35b), gear shaft (11) are located the below of lock board (4), and gear shaft (11) have the tooth type both sides of tooth portion respectively with first rack (28a) and second rack (28b) the meshing of lock board (4) another side, gear shaft (11) have the tooth type middle part and the meshing of locking rack (6) of tooth portion, and the back of locking rack (6) is lift lock round pin (7) integrative with locking rack (6), and locking rack (6) set up in fourth spout (29), fourth spout (29) are fixed on bottom plate (37).

2. A mechanical combination lock incapable of obtaining a combination through a mechanical comparison method according to claim 1, wherein the clutch ring (19) is provided with a third sliding groove (25), and the protruding part of the clutch ring (19) is provided with a first pin hole (27); the clutch ring (19) is connected with a fixing groove (30) on the square shaft (17) through a first pin hole (27), the square shaft (17) is arranged in a fifth sliding groove (32) on the bottom plate, a limiting plate fastening groove (31) is formed in the tail of the square shaft (17), and a limiting plate (18) is fixed in the limiting plate fastening groove (31); a square shaft handle (42) of the square shaft (17) extends from a second extending hole (43) of the bottom plate (37).

3. A mechanical combination lock, which does not allow the combination to be broken by mechanical contrast, according to claim 1, characterized in that each combination groove (3) and locking groove (10) are sandwiched between two adjacent square teeth (55).

4. A mechanical combination lock, where the combination cannot be broken by mechanical contrast, according to claim 1, characterized in that the length of the combination groove (3) is greater than the length of the locking groove (10) compared to the locking groove (10) of the combination groove (3).

5. A mechanical combination lock which cannot be used to obtain a combination by mechanical contrast, according to claim 1, characterized in that the locking plate (4) is below the locking plate (8), and the locking pin (5) on the locking plate (4) and the combination pin (14) on the locking plate (8) are at the same level.

6. A mechanical combination lock, according to claim 1 or 4, wherein the combination groove (3) is flush with the locking groove (10) at the end remote from the end face of the combination wheel (2) to which it belongs.

7. A mechanical combination lock with the feature that the combination cannot be broken by mechanical comparison according to claim 1, wherein the locking plate handle (40) extends from the first extension hole (41) in the back plate (38).

8. A mechanical combination lock which cannot be used to obtain a combination by mechanical comparison according to claim 1, wherein the outer circumference of the combination input device (1) is printed or engraved with numbers.

9. The mechanical coded lock incapable of obtaining the code through the mechanical comparison method according to claim 1 or 2, wherein the clutch ring (19) comprises a clutch ring inner cylinder (50) and a clutch ring outer cylinder (51), and the clutch ring inner cylinder (50) and the clutch ring outer cylinder (51) are disconnected at a gap (54); the clutch ring outer cylinder (51) is further divided into two parts by a third sliding groove (25); the length of the clutch ring inner cylinder (50) is greater than that of the clutch ring outer cylinder (51), the clutch ring inner cylinder (50) protrudes out relative to two sides of the clutch ring outer cylinder (51), one protruding side is a clutch ring first flange (52), and the other protruding side is a clutch ring second flange (53); the second flange (53) of the clutch ring is only used for jacking the password wheel (2) away from the original position when the password lock is in an open state and the square shaft (17) moves to the limit position, so that the password wheel (2) is disengaged from the password input device (1), the second flange (53) of the clutch ring is also withdrawn to the original position in other states or after the square shaft (17) returns to the original position, and the password input device (1) is re-engaged with the password wheel (2).