Substitution structure and key code lock

Abstract

The application provides a code conversion structure and a key password lock, which comprises a tubular key seat, a cylindrical key coaxially connected in the key seat, and a ring-shaped positioning ring connected to the key; a coded positioning groove and a non-coded positioning groove are arranged on the radial side surface of the key, and the included angle of the coded positioning groove and the non-coded positioning groove in the circumferential direction of the key is 90 degrees; a coded moving groove corresponding to the coded positioning groove is arranged on the radial side surface of the key; a non-coded moving groove corresponding to the non-coded positioning groove is arranged on the radial side surface of the key; the distance from the non-coded moving groove to the bottom of the key seat is smaller than the distance from the coded moving groove to the bottom of the key seat; a positioning groove and a moving groove are arranged on the side wall of the key seat, and the positioning groove and the moving groove are symmetric about the center of the key seat; the positioning plate and the moving plate can move along the direction of the positioning groove and the moving groove; the positioning plate is provided with a positioning strip connected with the positioning groove; and the moving plate is provided with a moving strip connected with the moving groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of combination lock, in particular to a code changing structure and a key combination lock. BACKGROUND

[0002] The key combination lock is used by the user to open the lock without carrying the key, and the lock is realized by the linkage of the mechanical structure.

[0003] The key combination lock of patent number CN202110504526.3, named as key combination lock with replaceable code, applied by the applicant on May 10, 2021, can be used as the closest prior art of the present application.

[0004] The key combination lock, the core structure of which is on the code changing mechanism, so how to design the code changing mechanism is a problem to be considered. SUMMARY

[0005] In view of the problems pointed out in the background art, the present application proposes a code changing structure and a key combination lock different from the prior art, which is simple in structure, reasonable in design and convenient to operate.

[0006] The technical scheme of the present application is as follows:

[0007] A code changing structure, comprising a tubular key seat, a cylindrical key coaxially connected in the key seat, the key being axially slidably connected with the key seat, a ring-shaped positioning ring connected on the key, the key being positioned in the axial sliding position by the friction between the positioning ring and the key seat;

[0008] A code positioning groove and a non-code positioning groove are arranged on the radial side surface of the key, and the included angle of the code positioning groove and the non-code positioning groove in the circumferential direction of the key is 90 degrees;

[0009] A code moving groove corresponding to the code positioning groove is arranged on the radial side surface of the key, and the included angle of the code moving groove and the code positioning groove in the circumferential direction of the key is 180 degrees; a non-code moving groove corresponding to the non-code positioning groove is arranged on the radial side surface of the key, and the included angle of the non-code moving groove and the non-code positioning groove in the circumferential direction of the key is 180 degrees;

[0010] The distance from the non-code moving groove to the bottom of the key seat is less than the distance from the code moving groove to the bottom of the key seat;

[0011] A positioning groove and a moving groove are arranged on the side wall of the key seat, and the positioning groove and the moving groove are symmetric about the center of the key seat;

[0012] Further comprising a positioning plate and a moving plate which can move along the direction of the positioning groove and the moving groove, the positioning plate being provided with a positioning strip connected with the positioning groove, and the moving plate being provided with a moving strip connected with the moving groove.

[0013] The present application further provides that a limiting groove is arranged on the radial side of the key, and the included angle between the two sides of the limiting groove in the circumferential direction of the key is 90 degrees.

[0014] A key password lock comprises a shell, a cover arranged on the front side of the shell, a tubular key seat arranged on the bottom of the shell, a cylindrical key coaxially connected in the key seat, the rear end of the key axially slidingly connected with the key seat, the front end of the key penetrating the cover, the diameter of the rear end of the key larger than that of the front end, and a ring-shaped positioning ring connected with the rear end of the key.

[0015] The rear end of the key is provided with a coded positioning groove and a non-coded positioning groove on the radial side thereof, and the included angle between the two grooves in the circumferential direction of the key is 90 degrees.

[0016] The rear end of the key is provided with a coded moving groove corresponding to the coded positioning groove on the radial side thereof, and the included angle between the two grooves in the circumferential direction of the key is 180 degrees.

[0017] The rear end of the key is provided with a non-coded moving groove corresponding to the non-coded positioning groove on the radial side thereof, and the included angle between the two grooves in the circumferential direction of the key is 180 degrees.

[0018] The distance from the non-coded moving groove to the bottom of the shell is smaller than that from the coded moving groove to the bottom of the shell.

[0019] The side wall of the key seat is provided with a positioning slot and a moving slot, and the two slots are symmetric about the center of the key seat.

[0020] A plurality of key seats are arranged in the shell, and the plurality of key seats comprise a plurality of key seats arranged in the left-right direction.

[0021] The shell further comprises a ring-shaped moving plate slidingly connected in the shell, a moving strip arranged on the lower side wall of the moving plate and corresponding to the moving slot, a driving part arranged on the upper side wall of the moving plate and corresponding to the positioning slot, and a pushing part protruding downward from the lower side wall of the moving plate and penetrating the shell.

[0022] The shell further comprises a ring-shaped positioning plate arranged on the front side of the moving plate, the positioning plate and the moving plate fixedly connected in the left-right direction and slidingly connected in the up-down direction, a limiting protrusion protruding forward from the lower side of the positioning plate and limiting the downward movement of the positioning plate, and a positioning strip arranged on the upper side wall of the positioning plate and corresponding to the positioning slot.

[0023] The shell is internally provided with spring one, which can exert downward elastic force on the moving plate;

[0024] The shell is internally provided with spring two, which can exert downward elastic force on the positioning plate;

[0025] The upper end of the shell is connected with a U-shaped lock beam, and the upper side of the shell is provided with holes for the left and right ends of the lock beam to pass through;

[0026] Further comprising a U-shaped locking member, the opening of the locking member is downwardly arranged, the left and right sides of the lower side of the locking member are respectively hinged to the left and right sides of the moving plate, the left and right sides of the upper side of the locking member are respectively provided with forwardly protruding locking portions, the left and right ends of the lock beam are respectively provided with locking grooves connected with the locking portions, spring three is arranged between the moving plate and the locking member, spring three can exert rearward elastic force on the moving plate and forward elastic force on the locking member, the left and right sides of the cover body are respectively provided with top rods extending to the left and right sides of the locking member, and the front side surfaces of the left and right sides of the locking member are respectively provided with arc-shaped grooves matched with the top rods;

[0027] The right end of the lock beam extends to between the moving plate and the positioning plate, the lower side of the right end of the lock beam is provided with spring four, spring four can exert upward elastic force on the lock beam, and the end portion of the right end of the lock beam is provided with a barb portion, which can drive the positioning plate to move upward.

[0028] Further, a limiting groove is arranged on the side of the key in the radial direction, the included angle between the two sides of the limiting groove in the circumferential direction of the key is 90 degrees, and a limiting portion matched with the limiting groove is arranged on the cover body.

[0029] Further, two groups of key seats are arranged in the shell, the two groups of key seats are arranged in a spaced manner, the corresponding moving plate is provided with two moving plates arranged in an integrated manner, and the corresponding positioning plate is provided with two positioning plates arranged in an integrated manner.

[0030] By adopting the above technical scheme, the present application has the following beneficial effects:

[0031] (1) The key has a code setting state (the moving strip corresponds to the code moving groove) and a non-code setting state (the moving strip corresponds to the non-code moving groove). In the code setting state, the key needs to be pressed to be unlocked. In the non-code setting state, the key cannot be pressed, and if the non-code setting key is mistakenly pressed, the key cannot be unlocked. The number of key codes can be set at will.

[0032] (2) After all the code setting keys are pressed, the moving plate and the positioning plate are pushed upward by the pushing portion, and at the same time, the locking member moves upward and is pressed by the top rod, the locking member gradually swings backward, the locking portion on the locking member is separated from the locking groove on the lock beam, at this time, the lock beam can move upward, the left end of the lock beam is separated from the shell, and the key is unlocked.

[0033] (3) After unlocking, the movable plate of spring one can move downward under the action of spring one and reset.

[0034] (4) When the button is not set by mistake, press down on the locking beam. The locking beam drives the moving plate to move down, and the driving part on the moving plate pushes the button that was pressed down upward.

[0035] (5) Press the button. The button is positioned by axial pressing and sliding, relying on the friction between the positioning ring and the button seat. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the external structure of the combination lock of the present invention. Figure 1 .

[0038] Figure 2 This is a schematic diagram of the external structure of the combination lock of the present invention. Figure 2 .

[0039] Figure 3 A schematic diagram of the structure of the combination lock cover of the present invention when opened. Figure 1 .

[0040] Figure 4 A schematic diagram of the structure of the combination lock cover of the present invention when opened. Figure 2 .

[0041] Figure 5 This is a front view of the combination lock of the present invention.

[0042] Figure 6 For the present invention Figure 5 AA sectional view.

[0043] Figure 7 For the present invention Figure 5 BB cross-sectional view.

[0044] Figure 8 For the present invention Figure 5 CC section view.

[0045] Figure 9 For the present invention Figure 5 DD sectional view.

[0046] Figure 10 This is a schematic diagram of the internal structure of the present invention.Figure 1 .

[0047] Figure 11 The internal structure of the present application Figure 2 .

[0048] Figure 12 The structure hidden in the shell of the present application Figure 1 .

[0049] Figure 13 The structure hidden in the shell of the present application Figure 2 .

[0050] Figure 14 The structure hidden in the shell of the present application Figure 3 .

[0051] Figure 15 The structure hidden in the shell of the present application Figure 4 .

[0052] Figure 16 The internal structure of the present application Figure 3 .

[0053] Figure 17 The internal structure of the present application Figure 4 .

[0054] Figure 18 The structure of the positioning plate of the present application

[0055] Figure 19 The structure of the moving plate of the present application

[0056] Figure 20 The structure of the key of the present application Figure 1 .

[0057] Figure 21 The structure of the key of the present application Figure 2 .

[0058] Explanation of reference numerals in the drawings: shell 1, cover 2, key seat 3, key 4, mounting groove 5, coded positioning groove 6, uncoded positioning groove 7, coded moving groove 8, uncoded moving groove 9, positioning slot 10, moving slot 11, moving plate 12, moving bar 13, driving part 14, pushing part 15, positioning plate 16, limiting protrusion 17, positioning bar 18, spring 1 19, spring 2 20, locking beam 21, locking piece 22, locking part 23, locking slot 24, spring 3 25, jacking rod 26, arc-shaped groove 27, shaft rod 28, barb part 29, spring 4 30, limiting slot 41, limiting part 42. DETAILED DESCRIPTION

[0059] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort shall fall within the protection scope of the present application.

[0060] The following references are cited Figures 1-21 The present application is described as follows:

[0061] A key password lock comprises a shell 1, the shell 1 is provided with an open front side, and the shell 1 is provided with a cover 2 at the open front side.

[0062] The bottom of the inner side of the shell 1 is provided with a tubular key seat 3, the key seat 3 is arranged along the front-rear direction, and the shell 1 is provided with two groups of key seats 3, the two groups of key seats 3 are arranged in an up-down interval, and each group of key seats 3 comprises six key seats 3 arranged along the left-right direction.

[0063] The key seat 3 is coaxially connected with a cylindrical key 4, the rear end of the key 4 is axially slidably connected with the key seat 3, the front end of the key 4 penetrates through the cover 2, the diameter of the rear end of the key 4 is larger than the diameter of the front end of the key 4, the diameter of the rear end of the key 4 is slightly smaller than the inner diameter of the key seat 3, the cover 2 is provided with a hole for the front end of the key 4 to penetrate through, and the diameter of the hole is equal to the diameter of the front end of the key 4. The key 4 can be moved along the axial direction by manually pressing the key 4.

[0064] The rear end of the key 4 is connected with an annular positioning ring (not shown in the figure), the key 4 is positioned in the axial sliding position by the friction force between the positioning ring and the key seat 3, the positioning ring is made of rubber material, the outer side wall of the rear end of the key 4 is provided with an annular mounting groove 5, the positioning ring is connected in the mounting groove 5, and the outer diameter of the positioning ring is larger than the inner diameter of the key seat 3.

[0065] The radial outer side surface of the rear end of the key 4 is provided with a coded positioning groove 6 and a non-coded positioning groove 7, the included angle of the coded positioning groove 6 and the non-coded positioning groove 7 in the circumferential direction of the key 4 is 90 degrees.

[0066] The radial outer side surface of the rear end of the key 4 is provided with a coded moving groove 8 corresponding to the coded positioning groove 6, the included angle of the coded moving groove 8 and the coded positioning groove 6 in the circumferential direction of the key 4 is 180 degrees, which means that the coded moving groove 8 and the coded positioning groove 6 are located on the same straight line.

[0067] The radial outer side surface of the rear end of the key 4 is provided with a non-coded moving groove 9 corresponding to the non-coded positioning groove 7, the included angle of the non-coded moving groove 9 and the non-coded positioning groove 7 in the circumferential direction of the key 4 is 180 degrees, which means that the non-coded moving groove 9 and the non-coded positioning groove 7 are located on the same straight line.

[0068] The distance from the codeless moving slot 9 to the bottom of the shell 1 is less than the distance from the coded moving slot 8 to the bottom of the shell 1.

[0069] The side wall of the key seat 3 is provided with a positioning slot 10 and a moving slot 11, which are symmetric about the center of the key seat 3, the positioning slot 10 is located on the upper side of the key seat 3, and the moving slot 11 is located on the lower side of the key seat 3.

[0070] When the key 4 is coded, the key 4 is rotated to the position where the coded moving slot 8 corresponds to the moving slot 11, and when the key 4 is not coded, the key 4 is rotated to the position where the codeless positioning slot 7 corresponds to the moving slot 11.

[0071] It also includes a ring-shaped moving plate 12, one moving plate 12 is provided corresponding to a group of key seats 3, the moving plate 12 is provided with two upper and lower, the two upper and lower moving plates 12 correspond to the two upper and lower groups of key seats 3, the two upper and lower moving plates 12 are integrally provided, a group of key seats 3 is located on the inner side of one moving plate 12, the moving plate 12 is slidably connected in the shell 1, and the moving plate 12 and the shell 1 form a sliding fit in the up-down direction.

[0072] The lower side wall of the moving plate 12 is provided with a moving strip 13 connected corresponding to the moving slot 11, the moving strip 13 is upwardly extended, the upper side wall of the moving plate 12 is provided with a driving part 14 connected corresponding to the positioning slot 10, the driving part 14 is downwardly extended, the thickness of the driving part 14 gradually decreases from top to bottom, the lower side wall of the moving plate 12 is provided with a pushing part 15 protruding downward, the pushing part 15 passes out from the lower side of the shell 1, and the lower side wall of the shell 1 is provided with a hole for the pushing part 15 to pass out. Pressing the pushing part 15 manually can push the moving plate 12 to move upward.

[0073] It also includes a ring-shaped positioning plate 16, one positioning plate 16 is provided corresponding to a group of key seats 3, the positioning plate 16 is provided with two upper and lower, the two upper and lower positioning plates 16 correspond to the two upper and lower groups of key seats 3, the two upper and lower positioning plates 16 are integrally provided, a group of key seats 3 is located on the inner side of one positioning plate 16, the positioning plate 16 is provided corresponding to the moving plate 12, the positioning plate 16 is provided on the front side of the moving plate 12, the positioning plate 16 and the moving plate 12 are fixedly connected in the left-right direction, the positioning plate 16 and the moving plate 12 are slidably connected in the up-down direction, the lower side of the positioning plate 16 is provided with a limiting protrusion 17 protruding forward, and the limiting protrusion 17 can limit the downward movement of the positioning plate 16. In the front-rear direction, the moving plate 12 and the positioning plate 16 are limited between the shell 1 and the cover 2.

[0074] The upper side wall of the positioning plate 16 is provided with a positioning strip 18 connected corresponding to the positioning slot 10, and the positioning strip 18 can extend into the coded positioning slot 6 and the codeless positioning slot 7 to limit the rotation of the key 4.

[0075] When the key 4 is switched between the code setting and the non-code setting, the key 4 needs to be rotated. When the key 4 is rotated, the positioning plate 16 needs to be moved upward, so that the positioning strip 18 moves out of the code positioning groove 6 and the non-code positioning groove 7.

[0076] The shell 1 is provided with a spring 19, which can exert a downward elastic force on the moving plate 12. The spring 19 is provided in the upward and downward directions, and two springs 19 are respectively arranged on the left and right sides of the shell. When the moving plate 12 is driven by the pushing part 15 to move upward, the moving plate 12 will force the spring 19 to move upward and be compressed. When the pressing operation on the pushing part 15 is released, the moving plate 12 will move downward and reset under the action of the spring 19.

[0077] When the moving plate 12 moves upward, the positioning plate 16 will be moved upward.

[0078] The shell 1 is provided with a spring 20, which can exert a downward elastic force on the positioning plate 16. The spring 20 is provided in the upward and downward directions, and the spring 20 is provided on the right side of the shell 1. The upper end of the spring 20 abuts against the shell 1 (the shell 1 is provided with a protruding structure 100 protruding forward, and the spring 20 abuts against the protruding structure 100), the lower end of the spring 20 abuts against the positioning plate 16 (the positioning plate 16 is provided with a connecting column 200 protruding upward, and the connecting column 200 is inserted into the spring 20), and the spring 20 is located on the front side of the moving plate 12. Under the action of the spring 20, the positioning plate 16 abuts against the limiting protrusion 17.

[0079] The upper end of the shell 1 is connected with a U-shaped locking beam 21, and the upper side wall of the shell 1 is provided with holes for the left and right ends of the locking beam 21 to pass through. The left and right sides of the upper side wall of the shell 1 are respectively provided with holes for the locking beam 21 to pass through.

[0080] It also includes a U-shaped locking member 22 arranged in the shell, and the opening of the locking member 22 is arranged downward. The left and right ends of the lower side of the locking member 22 are respectively hinged to the left and right sides of the moving plate 12, so that the locking member 22 can swing forward and backward. The left and right sides of the upper side of the locking member 22 are respectively provided with a locking part 23 protruding forward, and the locking part 23 is located on the upper side of the moving plate 12 and the positioning plate 16.

[0081] The left and right ends of the locking beam 21 are respectively provided with a locking groove 24 connected with the locking part 23, and the locking part 23 cooperates with the locking groove 24 to limit the locking beam 21.

[0082] A third spring 25 is arranged between the moving plate 12 and the locking member 22, and can apply a backward elastic force to the moving plate 12, and can apply a forward elastic force to the locking member 22. The third spring 25 is arranged on the upper side of the moving plate 12, and on the lower side of the middle part of the locking member 22, and corresponds to the middle position of the moving plate 12 in the left-right direction. The third spring 25 applies a pre-tightening force to the locking member 22 to rotate forward.

[0083] The cover 2 is provided with a top rod 26 extending to the left and right sides of the locking member 22, and the left and right sides of the locking member 22 are provided with an arc-shaped groove 27 cooperating with the top rod 26. When the pushing part 15 drives the moving plate 12 to move upward, the locking member 22 also moves upward, and the top rod 26 cooperates with the arc-shaped groove 27 to force the locking member 22 to gradually swing backward, so that the locking part 23 is separated from the locking groove 24, at this time, the lock can be opened, and the lock beam 21 can be pulled out.

[0084] The left and right ends of the lock beam 21 are located on the upper side of the moving plate 12 and the positioning plate 16.

[0085] The right end of the lock beam 21 is provided with a shaft rod 28 extending downward, and the diameter of the shaft rod 28 is smaller than that of the lock beam 21. The shaft rod 28 extends between the moving plate 12 and the positioning plate 16. The end of the shaft rod 28 is provided with a barb part 29, and the lower side of the shaft rod 28 is provided with a fourth spring 30. The fourth spring 30 can apply an upward elastic force to the lock beam 21, and is arranged in the up-down direction. The upper end of the fourth spring 30 abuts against the barb part 29 (a hole penetrating the barb part 29 is arranged in the shaft rod 28, and the upper end of the fourth spring 30 is connected in the hole), and the lower end of the fourth spring 30 abuts against the shell 1 (the shell 1 is provided with a protruding structure 100 protruding forward, and the fourth spring 30 and the second spring 20 abut against the protruding structure 100). The fourth spring 30 is arranged between the moving plate 12 and the positioning plate 16, and is arranged in correspondence with the second spring 20 in the up-down direction. When the lock beam 21 moves upward, the barb part 29 can drive the positioning plate 16 to move upward.

[0086] When it is necessary to set the code of the key 4, the lock beam 21 is pulled upward in the unlocked state, and the lock beam 21 drives the positioning plate 16 to move upward through the barb part 29. The positioning strip 18 on the positioning plate 16 moves out of the code positioning groove 6 and the non-code positioning groove 7. At this time, the key 4 can be rotated to switch between setting the code and not setting the code.

[0087] When the lock is in the locked state, the lock beam 21 can be pressed downward, and the lock beam 21 drives the locking member 22, the moving plate 12 and the positioning plate 16 to move downward. The moving plate 12 moves downward, and the driving part 14 enters the bottom of the key seat 3 through the positioning slot 10 to lift the pressed key 4.

[0088] The side of the key 4 radially is equipped with the limit groove 41, the two sides between the included angle of the limit groove 41 is 90 degrees on the circumferential of the key 4, further include the limit part 42 matched with the limit groove 41, the limit part 42 is arranged on the cover body 2.The limit part 42 is matched with the limit groove 41, the key 4 can only rotate 90 degrees, the key is switched between the setting code and not setting code.

[0089] The above only for the preferred embodiment of the application has not been used to limit the application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application, should be included in the protection scope of the application.

Claims

1. An escape structure, characterized by: The key is axially slidably connected with the key seat, and the key is connected with the annular positioning ring, and the key is positioned in the axial sliding position by the friction force between the positioning ring and the key seat; The radial side of the key is provided with a coded positioning groove and an uncoded positioning groove, and the included angle between the coded positioning groove and the uncoded positioning groove in the circumferential direction of the key is 90 degrees; The radial side of the key is provided with a coded moving groove corresponding to the coded positioning groove, and the included angle between the coded moving groove and the coded positioning groove in the circumferential direction of the key is 180 degrees; the radial side of the key is provided with an uncoded moving groove corresponding to the uncoded positioning groove, and the included angle between the uncoded moving groove and the uncoded positioning groove in the circumferential direction of the key is 180 degrees; The distance from the uncoded moving groove to the bottom of the key seat is less than the distance from the coded moving groove to the bottom of the key seat; The side wall of the key seat is provided with a positioning groove and a moving groove, and the positioning groove and the moving groove are symmetric about the center of the key seat; Further comprising a positioning plate and a moving plate which can move along the direction of the positioning groove and the moving groove, the positioning plate is provided with a positioning strip corresponding to the positioning groove, and the moving plate is provided with a moving strip corresponding to the moving groove; when the key is rotated, the positioning plate needs to move upwards, so that the positioning strip moves out of the coded positioning groove and the uncoded positioning groove; when the key is coded, the key is rotated to the position where the coded moving groove corresponds to the moving groove; when the key is not coded, the key is rotated to the position where the uncoded positioning groove corresponds to the moving groove.

2. A character-encoding structure according to claim 1, wherein: The radial side of the key is provided with a limiting groove, and the included angle between the two sides of the limiting groove in the circumferential direction of the key is 90 degrees, and further comprising a limiting part matched with the limiting groove.

3. A combination lock, characterized by: The shell is provided with a key seat at the bottom, the key seat is arranged along the front-rear direction, a cylindrical key is coaxially connected in the key seat, the rear end of the key is axially slidably connected with the key seat, the front end of the key penetrates out of the cover, the diameter of the rear end of the key is larger than that of the front end, the rear end of the key is connected with an annular positioning ring, and the key is positioned in the axial sliding position by the friction force between the positioning ring and the key seat; The radial side of the rear end of the key is provided with a coded positioning groove and an uncoded positioning groove, and the included angle between the coded positioning groove and the uncoded positioning groove in the circumferential direction of the key is 90 degrees; The radial side of the rear end of the key is provided with a coded moving groove corresponding to the coded positioning groove, and the included angle between the coded moving groove and the coded positioning groove in the circumferential direction of the key is 180 degrees; the radial side of the rear end of the key is provided with an uncoded moving groove corresponding to the uncoded positioning groove, and the included angle between the uncoded moving groove and the uncoded positioning groove in the circumferential direction of the key is 180 degrees; The distance from the uncoded moving groove to the bottom of the shell is less than the distance from the coded moving groove to the bottom of the shell; The side wall of the key seat is provided with a positioning groove and a moving groove, and the positioning groove and the moving groove are symmetric about the center of the key seat; A plurality of key seats are arranged along the left-right direction in the shell. ​ The mobile plate is connected to the shell in a sliding manner, and a moving strip corresponding to the moving slot is arranged on the lower side wall of the mobile plate. The positioning plate is arranged on the front side of the mobile plate, and the positioning plate and the mobile plate are fixedly connected in the left-right direction and slidably connected in the up-down direction. A spring one is arranged in the shell to apply a downward elastic force to the mobile plate. A spring two is arranged in the shell to apply a downward elastic force to the positioning plate. The upper end of the shell is connected with a U-shaped locking beam, and the upper side of the shell is provided with holes for the left and right ends of the locking beam to pass through. The locking member is arranged on the left and right sides of the mobile plate in a hinged manner, and the left and right sides of the upper side of the locking member are provided with locking portions protruding forward. The right end of the locking beam extends between the mobile plate and the positioning plate, the lower side of the right end of the locking beam is provided with a spring four, the spring four can apply an upward elastic force to the locking beam, and the end of the right end of the locking beam is provided with a barb portion.

4. A combination lock as claimed in claim 3 wherein: The side of the key in the radial direction is provided with a limiting groove, and the included angle between the two sides of the limiting groove in the circumferential direction of the key is 90 degrees.

5. A combination lock as defined in claim 3, wherein: The shell is provided with two groups of key seats arranged in a spaced manner in the up-down direction, and the corresponding mobile plate is provided with two mobile plates arranged in an integrated manner in the up-down direction. The corresponding positioning plate is provided with two positioning plates arranged in an integrated manner in the up-down direction.

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