Lock cylinder assembly convenient to install and provided with ejection structure and padlock

Abstract

A lock cylinder assembly convenient to install and provided with an ejection structure and a padlock comprise a lock cylinder, a rotating pipe driven by the lock cylinder to rotate, an ejection rod, an ejection compression spring and a pipe shell, the ejection rod and the ejection compression spring are contained in the rotating pipe, and the lock cylinder and the rotating pipe are sleeved with the pipe shell. The upper end of the rotating pipe is provided with a check ring allowing the ejector rod to partially penetrate through, the check ring is matched with the bulletproof protrusion so as to prevent the ejector rod from being separated from the rotating pipe, the rotating pipe is formed by splicing a first pipe piece and a second pipe piece, the cross section of the first pipe piece is semicircular, the side face of the first pipe piece is provided with a fixing protrusion, and the second pipe piece is provided with a second fixing protrusion. The second pipe piece is provided with a fixing hole matched with the fixing protrusion, the lower end of the first pipe piece is provided with a supporting plate used for supporting the ejection compression spring, the supporting plate is provided with a torsion concave part matched with the lock cylinder, and the lock cylinder is provided with a plug contained in the torsion concave part.

Description

Technical Field

[0001] This utility model relates to the field of locks, specifically to a lock cylinder assembly with an ejector structure that is easy to install. Background Technology

[0002] Chinese utility model patent CN215761029U discloses a lock cylinder assembly with an ejector structure that is easy to install, including a flexible lock beam, a lock shell, a button, a lock cylinder assembly, and a combination lock assembly. The button has a lock hole that locks with the movable end of the flexible lock beam and an ejection hole that allows the movable end to be pulled out, which communicates with the lock hole. The combination lock assembly includes a combination wheel, a code wheel driven by the combination wheel, and a wheel axle. The lock cylinder assembly includes a lock cylinder and a rotating tube driven by the lock cylinder. The rotating tube has a push rod for pressing the movable end out of the lock shell. An ejection compression spring is provided between the push rod and the lock cylinder. The lower end of the push rod has an anti-ejection protrusion, and the upper end of the rotating tube has an ejection blocking part that cooperates with the anti-ejection protrusion.

[0003] In the existing technology, the ejector compression spring directly presses against the lock cylinder. Therefore, during installation, the lock cylinder and the rotating tube are easily separated by the ejector compression spring, making installation more convenient. Utility Model Content

[0004] The purpose of this utility model is to provide a lock cylinder assembly with an ejector structure that is easy to install and a padlock.

[0005] To achieve the above objectives, this utility model provides a lock cylinder assembly with an ejector structure that is easy to install. The assembly includes a lock cylinder, a rotating tube driven by the lock cylinder, an ejector rod and an ejector compression spring housed within the rotating tube, and a casing sleeved over the lock cylinder and rotating tube. The ejector rod has an anti-ejection protrusion, and the upper end of the rotating tube has a retaining ring that allows the ejector rod to partially pass through. This retaining ring cooperates with the anti-ejection protrusion to prevent the ejector rod from detaching from the rotating tube. The rotating tube is composed of a first tube segment and a second tube segment with a semi-circular cross-section. The first tube segment has a fixing protrusion on its side, and the second tube segment has a fixing hole that cooperates with the fixing protrusion. The lower end of the first tube segment has a support plate for supporting the ejector compression spring. The support plate has a torsion recess that cooperates with the lock cylinder, and the lock cylinder has a plug housed within this torsion recess.

[0006] In one embodiment of this utility model, the support plate is provided with a first spring fixing protrusion into which the ejection compression spring is inserted, the push rod is provided with a second spring fixing protrusion into which the ejection compression spring is inserted, and the ejection compression spring abuts against the anti-ejection protrusion.

[0007] In one embodiment of the present invention, an elastic buckle is provided at the middle of the outer peripheral surface of the first tube segment and / or the second tube segment, and a buckle hole is provided on the outer peripheral surface of the tube shell to cooperate with the elastic buckle. The elastic buckle includes an elastic arm extending downward from the middle of the outer peripheral surface of the first tube segment and / or the second tube segment, and a buckle and protrusion extending away from the center of the rotating tube at the lower end of the elastic arm. The lower surface of the buckle and protrusion is provided with an insertion guide surface.

[0008] In one embodiment of this utility model, the upper end of the rotating tube is provided with a cam that protrudes from the tube shell.

[0009] In one embodiment of the present invention, the rotating tube is provided with an arc-shaped rotation limiting groove surrounding the rotating tube in the middle, and the tube shell is provided with a chordally positioned positioning pin hole communicating with the arc-shaped rotation limiting groove.

[0010] In one embodiment of this utility model, the lock cylinder is a blade lock cylinder, and the tube shell is provided with a blade through hole for accommodating the blade.

[0011] In one embodiment of this utility model, the rotating tube is made of plastic.

[0012] This utility model also provides a padlock, including a lock cylinder assembly with an ejector structure that is easy to install, a lock body, and a positioning pin as described above. The lock body has a positioning hole that communicates with the positioning pin hole. The positioning pin is inserted into the positioning pin hole through the positioning hole and is partially accommodated in the arc-shaped rotation limiting groove.

[0013] In one embodiment of this utility model, a flexible lock beam, a button, and a combination lock assembly are also included. The fixed end and movable end of the flexible lock beam are each provided with an annular locking notch. The button has a lock hole that engages with the movable end of the flexible lock beam and a pull-out hole communicating with the lock hole to allow the movable end to be pulled out. The combination lock assembly includes a combination wheel, a code wheel driven by the combination wheel, and a wheel axle. A steel ball is located between the upper end of the wheel axle and the button. A sliding post corresponding to the cam is slidably connected within the lock hole. The button has a pressing surface located on the side of the steel ball facing away from the rotating tube. When the padlock is locked, the net distance between the pressing surface and the sliding post is less than the diameter of the steel ball. The steel ball abuts against the pressing surface, the sliding post, and the wheel axle to restrict the movement of the button. When the lock cylinder assembly is unlocked, the recessed portion of the cam faces the sliding post, and the button can press the steel ball upwards into the space between the sliding post and the pressing surface. When the movement restriction is lifted and the combination wheel unlocks, the button is pressed, which in turn squeezes the steel ball and the wheel axle moves downward. The movement restriction of the button is then lifted. The lock body has a first circular mounting hole, a second circular mounting hole, and a third circular mounting hole that respectively accommodate the lock cylinder assembly, the combination wheel assembly, and the button. The lower end of the first mounting hole has a support ring that abuts against the lower end face of the lock cylinder. The upper end of the first mounting hole has a fixed cover with a through hole that allows the movable end to pass through. The fixed cover has a tubular limiting part. The button has a limiting protrusion that cooperates with the limiting part. The upper end of the second mounting hole has a fixed end through hole that only allows the fixed end of the flexible lock beam to pass through. The button has a strip-shaped fixing hole for engaging the fixed end and a fixed end mounting hole located near the lock hole end of the strip-shaped fixing hole. The limiting protrusion cooperates with the limiting part to prevent the button from disengaging from the third mounting hole and to keep the fixed end through hole corresponding to the strip-shaped fixing hole.

[0014] In one embodiment of this utility model, the sliding column has a semi-circular cross-section and an L-shaped groove arranged along the moving direction of the button. The lock body has multiple combination wheel grooves that respectively accommodate the combination wheels. The button has an L-shaped protrusion that is accommodated in the L-shaped groove. The sliding column and the button can be pre-assembled together and then installed into the lock body. The upper end of the wheel axle has a code wheel support ring, and the lower end has a snap ring groove connected to a snap ring. Multiple code wheels are located between the snap ring and the code wheel support ring. The outer circumferential surface of the code wheel has an axial protrusion, and the side of the second mounting hole has an axially arranged groove that can accommodate the axial protrusion. When the password is correct, the axial protrusion corresponds to the axial groove, allowing the axle to move. When the password is incorrect, the axial protrusion abuts against the side wall of the password wheel groove. The password wheel has multiple adjustment grooves to accommodate the axial protrusion. A cover is provided at the lower end of the second mounting hole, and a wheel axle compression spring is provided between the lower end of the axle and the cover. When the password is correct, the button can use the steel ball to press the axle, causing the axial protrusion to disengage from the adjustment groove. The lock body has a positioning mounting hole communicating with the password wheel groove. A positioning compression spring and a positioning steel ball are provided in the positioning mounting hole. The outer circumference of the password wheel has multiple positioning recesses that cooperate with the positioning steel ball. When the password is correct, the button can use the steel ball to press the axle, causing the axial protrusion to disengage from the adjustment groove. At this time, the user can change the password as needed.

[0015] In this application, the rotating tube is assembled from a first tube segment and a second tube segment with a semi-circular cross-section. The first tube segment has a fixing protrusion on its side, and the second tube segment has a fixing hole that mates with the fixing protrusion. The lower end of the first tube segment has a support plate for supporting the ejector compression spring. The support plate has a torsion recess that mates with the lock cylinder. The lock cylinder has a plug that is accommodated in the torsion recess. The ejector compression spring abuts against the support plate, forming a relatively stable structure. The push rod, ejector compression spring, rotating tube, lock cylinder and tube shell can be pre-assembled before the lock cylinder assembly is installed into the lock body, making installation more convenient. Attached Figure Description

[0016] Figure 1 A schematic diagram of the padlock structure according to the first embodiment of this utility model.

[0017] Figure 2 for Figure 1 An exploded view of a padlock.

[0018] Figure 3 for Figure 2 Exploded view of the lock cylinder assembly.

[0019] Figure 4 for Figure 3 The structural diagrams of the first and second segments.

[0020] Figure 5 for Figure 2 The structural diagram of the lock body.

[0021] Figure 6 for Figure 6 A structural diagram of the lock body from another direction.

[0022] Figure 7 for Figure 2 The structural diagram of the button and sliding column.

[0023] Figure 8 for Figure 7 The structure diagram of the button from another direction.

[0024] Figure 9 for Figure 2 An exploded view of the cryptographic components.

[0025] Figure 10 for Figure 1 A cross-sectional view of the padlock. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-10 The padlock of the first embodiment of this utility model includes a lock cylinder assembly 1, a lock body 2, a positioning pin 3, a flexible lock beam 4, a button 5, and a password assembly 6.

[0028] The lock cylinder assembly 1 with an ejection structure, which is easy to install, includes a lock cylinder 11, a rotating tube 12 driven to rotate by the lock cylinder 11, an ejector rod 13 and an ejection compression spring 14 housed within the rotating tube 12, and a tube shell 15 sleeved around the lock cylinder 11 and the rotating tube 12. The ejector rod 13 is provided with an anti-ejection protrusion 131, and the upper end of the rotating tube 12 is provided with a retaining ring 1201 that allows the ejector rod 13 to partially pass through. The retaining ring 1201 cooperates with the anti-ejection protrusion 131 to prevent the ejector rod 13 from disengaging from the rotating tube 12. 2 is composed of a first tube 121 and a second tube 122 with a semi-circular cross section. The first tube 121 has a fixing protrusion 1211 on its side, and the second tube 122 has a fixing hole 1221 that mates with the fixing protrusion 1211. The lower end of the first tube 121 has a support plate 1212 for supporting the push-out compression spring 14. The support plate 1212 has a torsion recess 12120 that mates with the lock cylinder 11. The lock cylinder 11 has a plug 111 that is accommodated in the torsion recess 12120.

[0029] The support plate 1212 is provided with a first spring fixing protrusion 1213 for inserting and ejecting the compression spring 14, and the push rod 13 is provided with a second spring fixing protrusion 1311 for inserting and ejecting the compression spring 14. The ejecting compression spring 14 abuts against the anti-ejection protrusion 131.

[0030] The first tube segment 121 and / or the second tube segment 122 are provided with an elastic buckle 123 at the middle of their outer peripheral surfaces. The outer peripheral surface of the tube shell 15 is provided with a buckle hole 15a that cooperates with the elastic buckle 123. The elastic buckle 123 includes an elastic arm 1231 extending downward from the middle of the outer peripheral surface of the first tube segment 121 and / or the second tube segment 122, and a buckle and protrusion 1232 extending away from the center of the rotating tube 12 at the lower end of the elastic arm 1231. The lower surface of the buckle and protrusion 1232 is provided with an insertion guide surface.

[0031] The upper end of the rotating tube 12 is provided with a cam 1203 that protrudes from the tube shell 15.

[0032] The rotating tube 12 has an arc-shaped rotation limiting groove 1205 surrounding the rotating tube 12 in the middle, and the tube shell 15 has a chordally arranged positioning pin hole 1501 communicating with the arc-shaped rotation limiting groove 1205.

[0033] The lock cylinder 11 is a blade lock cylinder 11, and the tube shell 15 is provided with a blade through hole 1503 to accommodate the blade.

[0034] The rotating tube 12 is made of plastic.

[0035] The lock body 2 has a positioning hole 2a that communicates with the positioning pin hole 1501. The positioning pin 3 is inserted into the positioning pin hole 1501 through the positioning hole 2a and is partially accommodated in the arc-shaped rotation limiting groove 1205.

[0036] The fixed end 41 and movable end 42 of the flexible lock beam 4 are respectively provided with annular locking notches 40. The button 5 is provided with a lock hole 501 that locks with the movable end 42 of the flexible lock beam 4, and a pull-out hole 502 that communicates with the lock hole 501 and allows the movable end 42 to be pulled out. The password assembly 6 includes: a password wheel 61, a code wheel 62 driven by the password wheel 61, a wheel axle 63, a steel ball 8 between the upper end of the wheel axle 63 and the button 5, and a sliding column corresponding to the cam 1203 is slidably connected in the lock hole 501. 7. Button 5 has a pressing surface 50 located on the side of steel ball 8 facing away from rotating tube 12. When the padlock is in the locked state, the net distance between the pressing surface 50 and the sliding post 7 is less than the diameter of steel ball 8. Steel ball 8 abuts against pressing surface 50, sliding post 7 and wheel axle 63 to restrict the movement of button 5. When lock cylinder assembly 1 is unlocked, the recessed part of cam 1203 faces the sliding post 7, and button 5 can press steel ball 8 upward into the space between sliding post 7 and pressing surface 50. The movement restriction of button 5 is released. When combination wheel 61 is unlocked, button 5 is pressed inward. As the compression steel ball 8 and axle 63 move downwards, the movement restriction of button 5 is released. Lock body 2 has three circular mounting holes: a first mounting hole 201, a second mounting hole 202, and a third mounting hole 203, respectively accommodating the lock cylinder assembly 1, the password assembly 6, and button 5. The lower end of the first mounting hole 201 has a support ring 2011 that abuts against the lower end face of the lock cylinder 11. The upper end of the first mounting hole 201 is fixed with a fixing cover 91 with a through hole, allowing the movable end 42 to pass through. The fixing cover 91 has a tubular limiting part 911. Button 5 is... The button 5 has a limiting protrusion 51 that cooperates with the limiting part 911. The upper end of the second mounting hole 202 is provided with a fixed end through hole 2020 that allows only the fixed end 41 of the flexible locking beam 4 to pass through. The button 5 is provided with a strip-shaped fixing hole 503 for engaging the fixed end 41 and a fixed end mounting hole 504 located at the end of the strip-shaped fixing hole 503 near the lock hole 501. The limiting protrusion 51 cooperates with the limiting part 911 to prevent the button 5 from disengaging from the third mounting hole 203 and to keep the fixed end through hole 2020 corresponding to the strip-shaped fixing hole 503.

[0037] The sliding post 7 has a semi-circular cross-section and an L-shaped groove 701 arranged along the moving direction of the button 5. The lock body 2 has multiple combination wheel grooves 205 for accommodating combination wheels 61. The button 5 has an L-shaped protrusion 53 that is accommodated in the L-shaped groove 701. The sliding post 7 and the button 5 can be pre-assembled together and then installed into the lock body 2. The upper end of the axle 63 has a code wheel support ring 631, and the lower end has a snap ring groove for connecting snap rings 633. Multiple code wheels 62 are located between the snap rings and the code wheel support ring 631. Between them, the outer peripheral surface of the code wheel 62 is provided with an axial protrusion 621, and the side of the second mounting hole 202 is provided with an axial groove that can accommodate the axial protrusion 621. When the code is correct, the axial protrusion 621 corresponds to the position of the axial groove, and the wheel axle 63 can move. When the code is incorrect, the axial protrusion 621 abuts against the side wall of the code wheel groove 205. The code wheel 61 is provided with multiple code adjustment grooves 610 that can accommodate the axial protrusion 621. The lower end of the second mounting hole 202 is provided with a cover 95, which is connected and fixed to the lock body. A wheel axle compression spring 66 is provided between the lower end of the wheel axle 63 and the cover 95. When the password is correct, the button 5 can use the steel ball 8 to press the wheel axle 63, causing the axial protrusion 621 to disengage from the code adjustment groove 610. The lock body 2 has a positioning mounting hole 206 that communicates with the password wheel groove 205. The positioning mounting hole 206 is provided with a positioning compression spring 97 and a positioning steel ball 98. The outer circumferential surface of the password wheel 61 has multiple positioning recesses 61a that cooperate with the positioning steel ball 98. When the password is correct, the button 5 can use the steel ball 8 to press the wheel axle 63, causing the axial protrusion 621 to disengage from the code adjustment groove 610. At this time, the user can change the password as needed. The button 5 has a flat surface 500 that fits against the lower end face of the limiting part to limit the rotation of the button 5. The button 5 has an avoidance hole 506 that communicates with the strip-shaped fixing hole 503 and the fixing end mounting hole 504.

[0038] In this application, the rotating tube 12 is assembled from a first tube 121 and a second tube 122 with a semi-circular cross-section. The first tube 121 has a fixing protrusion 1211 on its side, and the second tube 122 has a fixing hole 1221 that mates with the fixing protrusion 1211. The lower end of the first tube 121 has a support plate 1212 for supporting the ejector compression spring 14. The support plate 1212 has a torsion recess 12120 that mates with the lock cylinder 11. The lock cylinder 11 has a plug 111 that is accommodated in the torsion recess 12120. The ejector compression spring 14 abuts against the support plate 1212, forming a relatively stable structure. The push rod 13, the ejector compression spring 14, the rotating tube 12, the lock cylinder 11 and the tube shell 15 can be pre-assembled before the lock cylinder assembly 1 is installed into the lock body 2, which makes installation more convenient.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lock cylinder assembly with an ejection structure for easy installation, comprising a lock cylinder, a rotating tube driven to rotate by the lock cylinder, an ejector rod and an ejector compression spring accommodated in the rotating tube, a tube shell sleeved outside the lock cylinder and the rotating tube, the ejector rod being provided with an anti-ejection protrusion, and the upper end of the rotating tube being provided with a stop ring allowing the ejector rod to partially pass through, the stop ring cooperating with the anti-ejection protrusion to prevent the ejector rod from being separated from the rotating tube, characterized in that, The rotating tube is made of a first tube piece and a second tube piece with a semicircular cross section, the first tube piece is provided with a fixing protrusion, the second tube piece is provided with a fixing hole matched with the fixing protrusion, the first tube piece is provided with a support plate at the lower end for supporting the ejection compression spring, the support plate is provided with a torsion recess matched with the lock core, and the lock core is provided with a plug accommodated in the torsion recess.

2. The easy-to-install lock cylinder assembly with a knock-out structure according to claim 1, wherein The support plate is provided with a first spring fixing protrusion inserted into the ejection compression spring, the ejector rod is provided with a second spring fixing protrusion inserted into the ejection compression spring, and the ejection compression spring abuts against the anti-ejection protrusion.

3. The easy-to-install lock cylinder assembly with a knock-out structure according to claim 1, wherein The first tube piece and / or the second tube piece is provided with an elastic buckle in the middle of the outer periphery, the tube shell is provided with a buckle hole matched with the elastic buckle, the elastic buckle comprises an elastic arm extending downward from the middle of the outer periphery of the first tube piece and / or the second tube piece and a buckle and a protrusion extending away from the center of the rotating tube at the lower end of the elastic arm, and the lower surface of the buckle and the protrusion is provided with an insertion guide surface.

4. The easy-to-install lock cylinder assembly with an ejection structure of claim 3, wherein, The upper end of the rotating tube is provided with a cam for leaking out the tube shell.

5. The easy-to-install lock cylinder assembly with an ejection structure of claim 4, wherein, The middle of the rotating tube is provided with an arc-shaped rotation limiting groove arranged around the rotating tube, and the tube shell is provided with a positioning pin hole arranged in the chord direction and communicated with the arc-shaped rotation limiting groove.

6. The easy-to-install lock cylinder assembly with an ejection structure of claim 5, wherein, The lock core is a blade lock core, and the tube shell is provided with a blade through hole for accommodating the blade.

7. The easy-to-install lock cylinder assembly with an ejection structure of claim 1, wherein, The rotating tube is made of plastic.

8. A padlock, characterized in that The lock body is provided with a positioning hole communicated with the positioning pin hole, and the positioning pin is inserted into the positioning pin hole through the positioning hole and partially accommodated in the arc-shaped rotation limiting groove. The rotating tube is made of plastic.

9. The padlock of claim 8, wherein, Also include flexible lock beam, button, password components, the fixed end and the movable end of the flexible lock beam are respectively provided with annular locking gap, the button is provided with lock hole which is locked with the movable end of the flexible lock beam, and the pull-out hole which allows the movable end to pull out and communicate with the lock hole;The password component includes: password wheel, code adjusting wheel driven by the password wheel, wheel shaft, the upper end of the wheel shaft and the button have a steel ball between the button, the lock hole is slidably connected with the sliding column corresponding to the cam, the button is provided with the extrusion surface on the side of the steel ball away from the rotating pipe, when the padlock is in the locked state, the net distance between the extrusion surface and the sliding column is less than the diameter of the steel ball, the steel ball abuts against the extrusion surface, the sliding column and the wheel shaft to limit the movement of the button, when the lock cylinder assembly is unlocked, the recessed part of the cam faces the sliding column, the button can extrude the steel ball to move up between the sliding column and the extrusion surface, the movement restriction of the button is removed, when the password wheel is unlocked, the button is pressed and extrudes the steel ball and the wheel shaft to move down, the movement restriction of the button is removed, the lock body is provided with circular first mounting hole, second mounting hole and third mounting hole which accommodate the lock cylinder assembly, the password component and the button respectively, the lower end of the first mounting hole is provided with support ring abutting against the end face of the lower end of the lock cylinder, the upper end of the first mounting hole is fixed with fixed cover with through hole allowing the movable end to pass through, the fixed cover is provided with tubular limiting part, the button is provided with limiting protrusion matched with the limiting part, the upper end of the second mounting hole is provided with fixed end through hole allowing only the fixed end of the flexible lock beam to pass through, the button is provided with strip-shaped fixed hole for engaging the fixed end and fixed end mounting hole located at one end of the strip-shaped fixed hole close to the lock hole, the limiting protrusion matches with the limiting part to prevent the button from being separated from the third mounting hole, and the fixed end through hole corresponds to the strip-shaped fixed hole.

10. The padlock of claim 9, wherein, The sliding column section is semicircular, the sliding column is provided with an L-shaped sliding groove arranged along the moving direction of the button, the lock body is provided with a plurality of password wheel grooves for accommodating the password wheels respectively, the button is provided with an L-shaped protrusion accommodated in the L-shaped sliding groove, the wheel shaft is provided with a code adjusting wheel supporting ring at the upper end and a snap spring slot connected with a snap spring at the lower end, a plurality of code adjusting wheels are located between the snap spring and the code adjusting wheel supporting ring, the code adjusting wheel is provided with an axial protrusion on the outer circumferential surface, the second mounting hole is provided with an axial groove arranged axially and capable of accommodating the axial protrusion, when the password is correct, the axial protrusion is in position correspondence with the axial groove, the wheel shaft can move, when the password is incorrect, the axial protrusion abuts against the sidewall of the password wheel groove, the password wheel is provided with a plurality of code adjusting grooves capable of accommodating the axial protrusion, the second mounting hole is provided with a cover at the lower end, the wheel shaft is provided with a wheel shaft compression spring between the lower end and the cover, when the password is correct, the button can extrude the wheel shaft through the steel ball to make the axial protrusion disengage from the code adjusting groove, the lock body is provided with a positioning mounting hole in communication with the password wheel groove, the positioning mounting hole is provided with a positioning compression spring and a positioning steel ball, the password wheel is provided with a plurality of positioning recesses matched with the positioning steel ball.

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