Mode switching structure of coded lock
By designing a combination of knobs and spiral slots in the password lock, the lock mode switching is achieved, which solves the problem of users' unintentional password replacement, ensuring that the password is not replaced in private mode, improving user experience and security.
Patent Information
- Application Number
- CN202421142886.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-23
AI Technical Summary
When the prior art font wheel password lock is switched to the code swap mode, the user accidentally twitches the font wheel may cause the password to be changed, resulting in the user being unable to unlock the lock.
Design a mode switching structure for a password lock, changing the position of the movable pin through the spiral groove of the knob, thereby changing the position of the retaining ring on the lock shaft, limiting or allowing the axial movement of the bushing relative to the font wheel, and achieving the switching of the lock The purpose of public and private modes.
It realizes that the password cannot be changed in private mode, preventing users from accidentally changing their password without knowing it, making it easy to operate and does not need to remove the lock and replace the accessories.
Smart Images
Figure CN222457087U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of password locks, in particular to a mode switching structure of a password lock. Background Art
[0002] The cabinet locks in the domestic market, especially those where the password needs to be changed frequently, generally use wheel locks with the password change function. When the locker changes users, the password can be changed by switching to the code change mode and turning the wheel.
[0003] In the existing wheel combination lock, there is no mechanism to restrict the change of password. When the lock is accidentally touched and switched to the code change mode, there is a high possibility that the user will change the password by accidentally turning the wheel. As a result, after locking the door, the user himself is not clear about the current correct password, resulting in the user being unable to unlock the door when using it again. Utility Model Content
[0004] The utility model aims to provide a mode switching structure of a password lock, which solves the problems existing in the prior art and can switch between a public mode and a private mode, and the password cannot be changed in the private mode, thereby preventing the user from accidentally changing the password without knowing it.
[0005] In order to achieve the above purpose, the solution of the utility model is:
[0006] A mode switching structure of a password lock, comprising a lock shell, and a character wheel assembly and a switching assembly installed in the lock shell; the character wheel assembly comprises a lock shaft axially movably engaged in the lock shell, and a plurality of groups of bushings and character wheels sleeved on the lock shaft; the switching assembly comprises a knob, a retaining ring, a movable pin and an elastic member; the knob is rotatably engaged with the surface of the lock shell, and a spiral groove is provided on its inner side surface, and the spiral groove is provided with a high point and a low point; the retaining ring is sleeved on the lock shaft and abuts against the end face of the bushing; the movable pin is movably engaged between the knob and the retaining ring, and its two ends abut against the spiral groove and the circumferential surface of the retaining ring respectively, and when the knob is rotated, the movable pin drives or gives way to the retaining ring to move linearly in the axial direction of the lock shaft to limit or allow the axial movement of the bushing relative to the character wheel; the elastic member acts on the movable pin to provide elastic force so that one end of it abuts against the spiral groove.
[0007] The high point and the low point of the spiral groove are both spherical grooves, and the end of the movable pin abutting against the spiral groove is provided with a ball head matching the spherical groove.
[0008] A first inclined surface and a second inclined surface for sliding fit are respectively arranged on the contact surfaces of the movable pin and the retaining ring.
[0009] A C-shaped buckle is installed on the circumferential surface of the movable pin, and the elastic member is a spring sleeved on the movable pin, and two ends of the spring respectively abut against the interior of the lock shell and the C-shaped buckle.
[0010] Preferably, the end surface of the movable pin is provided with a groove for the C-shaped buckle to be embedded.
[0011] The mode switching structure of the combination lock also includes a sleeve spring acting on the end surface of the sleeve to make the sleeve abut against the retaining ring, and a lock shaft spring acting on the end surface of the lock shaft to move it toward the retaining ring.
[0012] The lock housing comprises a detachably mounted lock body, a front cover and a rear cover; the character wheel assembly is mounted between the front side of the lock body and the front cover, and the switching assembly is mounted between the back side of the lock body and the rear cover.
[0013] Preferably, the back cover is provided with a fan-shaped hole at a position corresponding to the knob, and the outer side surface of the knob is provided with a paddle movably fitted in the fan-shaped hole.
[0014] Preferably, the back cover is provided with an arc-shaped movable groove at a position corresponding to the fan-shaped hole; the knob is provided with a step movably fitted in the arc-shaped movable groove, and the paddle is formed on the surface of the step; the step movably fits between the two ends of the arc-shaped movable groove as the knob rotates.
[0015] Preferably, the knob is mounted on the surface of the back cover, and the end of the movable pin passes through the back cover and cooperates with the knob; the back cover is provided with a rotating shaft for the knob to rotatably cooperate with, and a guide limit block is provided on the side of the rotating shaft, and the side of the guide limit block is arc-shaped and has a sliding groove; the knob is rotatably sleeved on the rotating shaft, and its side surface is slidably engaged with the side surface of the guide limit block and is provided with a limit plate that slides in the sliding groove.
[0016] After adopting the above technical solution, the utility model has the following technical effects:
[0017] The utility model only requires the user to manually turn the knob to rotate it, and the position of the movable pin can be changed through the spiral groove of the knob, thereby changing the position of the retaining ring on the lock shaft, thereby limiting or allowing the axial movement of the bushing relative to the character wheel, and achieving the purpose of switching the public mode and the private mode of the lock. There is no need to disassemble the lock to replace accessories, the operation is convenient, and the multi-mode lock can meet the application requirements of different scenarios; in the private mode, since the bushing is restricted from axial movement relative to the character wheel, the password cannot be changed even if the password is correct, which can prevent the password from being changed inadvertently due to user's misoperation without knowing it. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a front view of the first embodiment of the utility model;
[0019] Figure 2 It is a back view of the first embodiment of the utility model;
[0020] Figure 3 It is a three-dimensional diagram of the first embodiment of the utility model;
[0021] Figure 4 This is an exploded view of the first embodiment of the utility model;
[0022] Figure 5 It is a partial structural stereogram of the first embodiment of the utility model;
[0023] Figure 6 A perspective view of a knob according to a first embodiment of the present invention;
[0024] Figure 7 This is a schematic diagram of the common mode of the first embodiment of the utility model;
[0025] Figure 8 It is a common mode cross-sectional view of the first embodiment of the utility model;
[0026] Fig. 9 This is a private mode schematic diagram of the first embodiment of the utility model;
[0027] Fig.10 It is a cross-sectional view of a private mode of the first embodiment of the utility model;
[0028] Fig.11 This is a schematic diagram of the cooperation between the knob and the back cover of the second embodiment of the utility model;
[0029] Fig.12 A three-dimensional diagram of a knob according to a second embodiment of the present invention;
[0030] Fig.13 A plan view of the back cover of the second embodiment of the utility model;
[0031] Fig.14 It is a plan view of the third embodiment of the utility model;
[0032] Fig.15 A three-dimensional diagram of a knob according to a third embodiment of the present invention;
[0033] Description of Figure Numbers:
[0034] 1-lock housing; 11-lock body; 12-front cover; 13-rear cover; 131-sector-shaped hole; 132-arc-shaped movable groove; 133-rotating shaft; 2-wheel assembly; 21-lock shaft; 22-bushing; 23-wheel; 3-switching assembly; 31-knob; 311-spiral groove; 311a-high point; 311b-low point; 312-paddle; 313-step; 32-retaining ring; 321-second inclined plane; 33-movable pin; 331-ball head; 332-first inclined plane; 333-groove; 34-elastic member; 35-C-shaped buckle; 4-lock cylinder; 5-lock housing; 6-lock tongue; 7-bushing spring; 8-lock shaft spring. DETAILED DESCRIPTION
[0035] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.
[0036] The utility model discloses a mode switching structure of a password lock, comprising a lock shell 1, and a character wheel assembly 2 and a switching assembly 3 installed in the lock shell 1;
[0037] The character wheel assembly 2 includes a lock shaft 21 axially movably fitted in the lock housing 1, and a plurality of sets of bushings 22 and character wheels 23 sleeved on the lock shaft 21; the lock shaft 21 is used to limit the rotation of the handle of the lock, such as acting on the lock housing 5 equipped with the lock core 4 in the lock;
[0038] The switching assembly 3 includes a knob 31, a retaining ring 32, a movable pin 33 and an elastic member 34; the knob 31 is rotatably fitted on the surface of the lock housing 1, and a spiral groove 311 is provided on its inner side surface, and the spiral groove 311 is provided with a high point 311a and a low point 311b, and the high point 311a and the low point 311b are smoothly transitioned through an inclined surface; the retaining ring 32 is sleeved on the lock shaft 21 and abuts against the end surface of the bushing 22; the movable pin 33 is movably fitted between the knob 31 and the retaining ring 32, and its two ends abut against the spiral groove 311 and the circumferential surface of the retaining ring 32 respectively. When the knob 31 is rotated, the movable pin 33 drives or gives way to the retaining ring 32 to move linearly in the axial direction of the lock shaft 21 to limit or allow the axial movement of the bushing 22 relative to the character wheel 23; the elastic member 34 acts on the movable pin 33 to provide elastic force so that one end of it abuts against the spiral groove 311.
[0039] For those skilled in the art, the common knowledge related to the character wheel assembly is: in the normal state of the character wheel combination lock, the character wheel 23 is sleeved on the bushing 22, the bushing 22 is sleeved on the lock shaft 21, and the character wheel 23 and the bushing 22 rotate synchronously relative to the lock shaft 21; when switching to the mode of changing the password, the bushing 22 moves axially relative to the character wheel 23, and then detaches from the middle of the character wheel 23, and the character wheel 23 can rotate relative to the bushing 22, thereby changing the password. Therefore, as long as the axial movement of the bushing 22 relative to the character wheel 23 is restricted or allowed, the public mode (changeable password) and the private mode (non-changeable password) of the combination lock can be switched, wherein the state corresponding to the public mode is that the bushing 22 can move, and the state corresponding to the private mode is that the bushing 22 cannot move.
[0040] Through the above scheme, the utility model can change the position of the movable pin 33 through the spiral groove 311 of the knob 31, thereby changing the position of the retaining ring 32 on the lock shaft 21, only by the user manually turning the knob 31 to make it rotate, thereby limiting or allowing the axial movement of the bushing 22 relative to the character wheel 23, thereby achieving the purpose of switching the public mode and the private mode of the lock. There is no need to disassemble the lock to replace accessories, the operation is convenient, and the multi-mode lock can meet the application requirements of different scenarios; in the private mode, since the bushing 22 is restricted from axial movement relative to the character wheel 23, the password cannot be changed even if the password is correct, which can prevent the password from being changed inadvertently due to user misoperation without knowing it.
[0041] See also Figures 1 to 10 , showing the first embodiment of the utility model.
[0042] The high point 311a and the low point 311b of the spiral groove 311 are both spherical grooves, and the movable pin 33 is provided with a ball head 331 matching the spherical groove at the end of the spiral groove 311. When the ball head 311 enters the spherical groove corresponding to the high point 311a or the low point 311b, the knob 31 will encounter obvious resistance when it is turned in the reverse direction, which can facilitate the knob 31 from being misoperated, and there is an obvious sense of frustration (gear position) after it is turned into place, prompting the user whether the knob 31 is turned into place.
[0043] See also Figures 7 to 10 In this embodiment, when the movable pin 33 is matched to the high point 311a, the retaining ring 32 no longer restricts the axial movement of the bushing 22, and when the movable pin 33 is matched to the low point 311b, the retaining ring 32 abuts against the bushing 22, and the bushing 22 cannot move axially, that is, the password cannot be changed. The first inclined surface 332 and the second inclined surface 321 for sliding fit are respectively provided on the contact surface of the movable pin 33 and the retaining ring 32 to realize the conversion of the axial movement of the movable pin 33 (whose direction is the radial direction of the retaining ring 32) into the axial movement of the retaining ring 32 (whose direction is the axial direction of the retaining ring 32, that is, along the direction of the lock shaft 21).
[0044] A C-shaped buckle 35 is installed on the circumference of the movable pin 33, and the elastic member 34 is a spring and is sleeved on the movable pin 33, and the two ends of the elastic member 34 respectively abut against the interior of the lock housing 1 (i.e., the lock body 11) and the C-shaped buckle 35, so as to provide elastic force to drive the movable pin 33 to move toward the direction of the knob 31. In this embodiment, a groove 333 is provided on the end surface of the movable pin 33 for the C-shaped buckle 35 to be embedded.
[0045] The movable end of the lock core 4 is connected to the lock tongue 6 of the lock. When the lock is not provided with a physical lock core, the lock tongue 6 can also be directly connected to the lock housing 5.
[0046] The utility model further comprises a bushing spring 7 acting on the end surface of the bushing 22 to make the bushing 22 abut against the retaining ring 32 , and a shaft lock spring 8 acting on the end surface of the lock shaft 21 to make it move toward the retaining ring 32 .
[0047] The lock housing 1 comprises a detachably mounted lock body 11 , a front cover 12 and a rear cover 13 ; the character wheel assembly 2 is mounted between the front face of the lock body 11 and the front cover 12 , and the switching assembly 3 is mounted between the back face of the lock body 11 and the rear cover 13 .
[0048] Furthermore, a fan-shaped hole 131 is provided at the position of the back cover 13 corresponding to the knob 31, and a paddle 312 movably fitted in the fan-shaped hole 131 is provided on the outer side of the knob 31 to facilitate the user to turn the knob 31. The fan-shaped hole 131 can also guide the rotation of the knob 31.
[0049] The working principle of the present utility model is described below in conjunction with the first embodiment.
[0050] (1) Principle of password change in public mode: There is a spiral groove 311 in the knob 31. In the public mode, the spiral groove 311 of the knob 31 gives way, and the movable pin 33 rebounds under the action of the elastic member 34 until it contacts the high point 311a of the spiral groove 311. At this time, the movable pin 33 completely gives way to the retaining ring 32 at the front end of the bushing 32. In the unlocked state (correct password), the bushing 22 pushes the retaining ring 32 to move under the action of the bushing spring 7, so that the bushing 22 and the character wheel 23 are separated, and the password change operation can be performed.
[0051] (2) Principle of password change failure in private mode: In private mode, the movable pin 33 is pushed by the low point 311b of the spiral groove 311 to move toward the retaining ring 32, and the movable pin 33 blocks the movement of the retaining ring 32 and moves forward. At this time, even when the correct password is in the unlocking position, the bushing 22 cannot be pushed out by the bushing spring 7, and the password cannot be changed, but the character wheel can be moved (because the bushing 22 and the character wheel 23 are still in contact at this time), thereby preventing the password from being leaked. After the character wheel 23 is messed up, the lock housing 5 is locked and cannot be locked by rotating the handle, so the correct password must be entered again to lock it.
[0052] See also Figures 11 to 13 , shows a second embodiment of the utility model, mainly a structural example of the back cover 13 and the knob 31 of the second embodiment, that is, the difference between the second embodiment and the first embodiment lies in the structural design of the back cover 13 and the knob 31.
[0053] The above-mentioned rear cover 13 is provided with an arc-shaped movable groove 132 (the arc-shaped movable groove 132 is a major arc in the second embodiment) at the position corresponding to the fan-shaped hole 131 (the fan-shaped hole 131 is covered by the knob 31 in the figure and is not shown); the knob 31 is provided with a step 313 that is movably fitted in the arc-shaped movable groove 132, and the paddle 312 is formed on the surface of the step 313; the step 313 is movably fitted between the two ends of the arc-shaped movable groove 132 as the knob 31 rotates. The end of the arc-shaped movable groove 132 plays a role in limiting the rotation angle of the knob 31, and the step 313 increases the strength of the knob 31 and its paddle 312, which can prevent damage to the knob 31 during the rotation process; at the same time, due to the enhancement of the strength of the knob 31 by the step 313, the other parts of the knob 31 can be made thinner, and the other parts of the rear cover 13 other than the step 313 corresponding to the step 313 can also be made thinner, which is conducive to the lightweight design of the product.
[0054] See also Fig.14 and Fig.15 , showing the third embodiment of the utility model.
[0055] The third embodiment is different from the first and second embodiments in that the groove structure for the knob 31 to cooperate is not designed in the back cover 13, but the knob 31 is assembled on the surface of the back cover 13, and the movable pin 33 passes through the back cover 13 and cooperates with the knob 31; the back cover 13 is provided with a rotating shaft 133 for the knob 31 to rotate and cooperate with, and the side of the rotating shaft 133 is provided with a guide stopper 134, the side of the guide stopper 134 is arc-shaped and has a sliding groove; the knob 31 is rotatably sleeved on the rotating shaft 133, and its side is slidably engaged with the side of the guide stopper 134 and is provided with a stopper piece 314 that is slidably engaged in the sliding groove. The axial movement of the knob 31 can be limited by the cooperation of the sliding groove of the guide stopper 134 and the stopper piece 314 of the knob 31, and the rotation of the knob 31 can be guided and prevented from shaking by the cooperation of the side of the guide stopper 134 and the side of the knob 31.
[0056] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.
Claims
1. A mode switching structure of a password lock, characterized in that: It includes a lock housing, and a character wheel assembly and a switching assembly installed in the lock housing; The character wheel assembly comprises a lock shaft axially movably fitted in the lock housing, and a plurality of sets of bushings and character wheels sleeved on the lock shaft; The switching assembly includes a knob, a retaining ring, a movable pin and an elastic member; the knob is rotatably engaged with the surface of the lock housing, and a spiral groove is provided on its inner side surface, and the spiral groove is provided with a high point and a low point; the retaining ring is sleeved on the lock shaft and abuts against the end surface of the bushing; the movable pin is movably engaged between the knob and the retaining ring, and its two ends abut against the spiral groove and the circumferential surface of the retaining ring respectively, and when the knob is rotated, the movable pin drives or gives way to the retaining ring to move linearly in the axial direction of the lock shaft to limit or allow the axial movement of the bushing relative to the character wheel; the elastic member acts on the movable pin to provide elastic force so that one end of it abuts against the spiral groove.
2. The mode switching structure of the combination lock according to claim 1, characterized in that: The high point and the low point of the spiral groove are both spherical grooves, and the end of the movable pin abutting against the spiral groove is provided with a ball head matching the spherical groove.
3. The mode switching structure of the combination lock according to claim 1, characterized in that: A first inclined surface and a second inclined surface for sliding fit are respectively arranged on the contact surfaces of the movable pin and the retaining ring.
4. The mode switching structure of the combination lock according to claim 1, characterized in that: A C-shaped buckle is installed on the circumferential surface of the movable pin, and the elastic member is a spring sleeved on the movable pin, and two ends of the spring respectively abut against the interior of the lock shell and the C-shaped buckle.
5. The mode switching structure of the combination lock according to claim 4, characterized in that: The end surface of the movable pin is provided with a groove for the C-shaped buckle to be embedded.
6. The mode switching structure of the combination lock according to claim 1, characterized in that: It also includes a bushing spring acting on the end surface of the bushing to make the bushing abut against the retaining ring, and a lock shaft spring acting on the end surface of the lock shaft to move it toward the retaining ring.
7. The mode switching structure of the combination lock according to claim 1, characterized in that: The lock housing comprises a detachably mounted lock body, a front cover and a rear cover; the character wheel assembly is mounted between the front side of the lock body and the front cover, and the switching assembly is mounted between the back side of the lock body and the rear cover.
8. The mode switching structure of the combination lock according to claim 7, characterized in that: The rear cover is provided with a fan-shaped hole at a position corresponding to the knob, and the outer side surface of the knob is provided with a paddle movably fitted in the fan-shaped hole.
9. The mode switching structure of the combination lock according to claim 8, characterized in that: The back cover is provided with an arc-shaped movable groove at a position corresponding to the fan-shaped hole; the knob is provided with a step movably fitted in the arc-shaped movable groove, and the paddle is formed on the surface of the step; the step movably fits between the two ends of the arc-shaped movable groove as the knob rotates.
10. The mode switching structure of the combination lock according to claim 7, characterized in that: The knob is mounted on the surface of the rear cover, and the end of the movable pin passes through the rear cover and cooperates with the knob; the rear cover is provided with a rotating shaft for the knob to rotatably cooperate with, and a guide limit block is provided on the side of the rotating shaft, and the side of the guide limit block is arc-shaped and has a sliding groove; the knob is rotatably sleeved on the rotating shaft, and its side surface is slidably engaged with the side surface of the guide limit block and is provided with a limit plate that slides in the sliding groove.