Mechanism for operating a combination lock

Abstract

The utility model discloses an operating mechanism of a dial code lock makes the dial code lock more stable, and it includes password component, knob, movable block and lock tongue, the peripheral surface of password component is rotatably matched with knob, and movable block is slidably matched with the inner wall of knob along the axial direction of knob, and lock tongue is slidably matched with the inner wall of knob along the axial direction of knob and is arranged in movable block, password component includes movable axle and retainer that move along the radial direction of knob, the end of movable axle is movably matched with the upper of movable block, and with the rotation of knob, lock tongue is contacted and presses down movable block, the end of retainer is movably contacted with the inner arc surface of movable block, and when movable block is pressed down by movable axle, it is stretched to realize the movable cooperation on the upper surface of movable block, the end of inner arc surface is provided with notch, and the back slope is arranged between notch and inner arc surface, when the end of retainer is embedded in notch, movable block resets, and when knob resets, the back slope makes retainer reset.

Description

Technical Field

[0001] This utility model belongs to the field of combination lock technology, and specifically refers to an operating mechanism for a combination lock. Background Technology

[0002] Referring to the applicant's relevant patents CN212897978U, CN212897978U, CN214576332U, etc., the relevant structure and basic working principle of the pinwheel combination lock can be understood. The combination component is the core module of the pinwheel combination lock. The state and linkage between its pinwheel, bushing, movable shaft, retainer, and other components determine the current state of the pinwheel combination lock: when the pinwheel and bushing are engaged, they rotate synchronously, and the user can input the password by moving the pinwheel; when the password is correct, the unlocking boss of the movable shaft aligns with the unlocking groove of the bushing, and the movable shaft can be pushed without restricting the movement of the bolt, allowing the lock to unlock; when the retainer is pushed and separates the pinwheel from the bushing, the user can no longer rotate the bushing when moving the pinwheel, at which point the lock's password can be changed. Furthermore, in conjunction with other structural designs, functions such as "automatic randomization" and "password search" can also be implemented.

[0003] Rotary dial combination locks are known for their compact structure and are mainly used in public places as cabinet locks. In existing technology, rotary dial combination locks mainly rely on the design of concave and convex structures on the inner wall of the knob to cooperate with the movable shaft and retainer to achieve the movement and drive of the movable shaft and retainer. However, the structural stability is not high due to the influence of machining accuracy and component installation tolerances. Utility Model Content

[0004] The main purpose of this utility model is to provide an operating mechanism for a combination lock, which solves the problems existing in the prior art. It is suitable for rotary combination locks and can make the function of the lock more stable.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] An operating mechanism for a combination lock includes a combination component, a knob, a movable block, and a latch. The knob is rotatably fitted onto the circumferential surface of the combination component. The movable block slides along the axial direction of the knob onto the inner wall of the knob. The latch slides along the axial direction of the knob onto the inner wall of the knob and passes through the movable block. The combination component includes a movable shaft and a retainer that move radially along the knob. The end of the movable shaft is movably fitted above the movable block and contacts the latch and presses down on the movable block as the knob rotates. The end of the retainer movably abuts against the inner arc surface of the movable block and extends out when the movable block is pressed down by the movable shaft to achieve a movable fit on the upper surface of the movable block. A notch is provided at the end of the inner arc surface, and a push-back slope is provided between the notch and the inner arc surface. When the end of the retainer is inserted into the notch, the movable block resets. When the knob resets, the push-back slope resets the retainer.

[0007] The inner edge of the movable block protrudes to form an arc-shaped protrusion; the inner side of the protrusion is flush with the inner arc surface, and its outer side is provided with a pressure-receiving slope. Between the two ends of the protrusion, the pressure-receiving slope gradually rises along the unlocking direction; the end of the movable shaft is provided with a downward pressure slope that movably engages with the pressure-receiving slope.

[0008] The latch has a first unlocking ramp on the side facing the unlocking direction. The first unlocking ramp is used to push the end of the movable shaft to compress the movable shaft spring.

[0009] Preferably, the end of the movable shaft is provided with a second unlocking ramp opposite to the first unlocking ramp.

[0010] Preferably, the end of the movable shaft is provided with a first rotating inclined surface on the opposite side of the second unlocking inclined surface, and the first rotating inclined surface is used to push the upper end of the latch to compress the latch spring.

[0011] Preferably, the latch has a second rotating ramp on the opposite side of the first unlocking ramp.

[0012] The movable block is reset by a spring disposed between the movable block and the knob, and a guide mechanism is provided between the movable block and the knob.

[0013] Preferably, the guiding mechanism includes a guide hole disposed in the movable block and a guide post disposed in the knob.

[0014] Preferably, the inner wall of the knob is fitted with a limiting block for limiting the movable block.

[0015] The end of the retainer is provided with a tongue that movably abuts against the inner arc surface. The tongue is stepped. When the movable block is pressed down to a position lower than the stepped surface of the tongue, the retainer extends and the stepped surface of the tongue engages with the upper surface of the movable block.

[0016] After adopting the above technical solution, the present invention has the following technical effects:

[0017] This invention features a movable block on the inner wall of the knob, through which the bolt passes. When the knob is rotated, the bolt can contact or separate from the end of the movable shaft to achieve conventional locking and unlocking functions. As the movable shaft moves relative to the bolt, it presses down on the movable block to unlock the retainer. The radial movement of the retainer switches the combination lock's combination components to the password setting state. At this time, the retainer continuously presses down on the movable block to prevent it from resetting, thus maintaining the password setting state. When the knob is rotated to the unlocking direction, the notch at the end of the inner arc surface ensures the movable block resets. Then, when the knob is rotated in reverse, the push-back slope pushes the retainer back to its original position, allowing the lock to stably exit the password setting state and preventing accidental password changes due to user touch of the pins. This makes the password setting structure in the lock more stable. Attached Figure Description

[0018] Figure 1 This is a partial exploded view of a specific embodiment of the present utility model;

[0019] Figure 2 This is a perspective view of the movable block in a specific embodiment of the present utility model;

[0020] Figure 3 This is a perspective view of the locking tongue according to a specific embodiment of the present utility model;

[0021] Figure 4 The movable axis three-dimensional representation of this utility model Figure 1 ;

[0022] Figure 5 The movable axis three-dimensional representation of this utility model Figure 2 ;

[0023] Figure 6 This is a perspective view of the cage according to a specific embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the initial state of a specific embodiment of the present utility model;

[0025] Figure 8 for Figure 7 A cross-sectional view along the AA direction;

[0026] Figure 9 This is a schematic diagram of the unlocking process in a specific embodiment of the present utility model. Figure 1 ;

[0027] Figure 10 for Figure 9 Cross-sectional view along the BB direction;

[0028] Figure 11 This is a schematic diagram of the unlocking process in a specific embodiment of the present utility model. Figure 2 ;

[0029] Figure 12 for Figure 11 A cross-sectional view along the CC direction;

[0030] Figure 13 This is a schematic diagram of the password clearing process in a specific embodiment of this utility model;

[0031] Figure 14 for Figure 13 A cross-sectional view along the DD direction;

[0032] Figure 15 This is a schematic diagram of the password clearing state in a specific embodiment of this utility model;

[0033] Figure 16 for Figure 15 A cross-sectional view along the EE direction;

[0034] Figure 17 This is a schematic diagram of the password setting status in a specific embodiment of the present invention. Figure 1 ;

[0035] Figure 18 for Figure 17 A cross-sectional view along the FF direction;

[0036] Figure 19 This is a schematic diagram of the password setting status in a specific embodiment of the present invention. Figure 2 ;

[0037] Figure 20 for Figure 19 Cross-sectional view along the GG direction;

[0038] Explanation of icon numbers:

[0039] 1-Knob; 11-Guide post;

[0040] 2-Moving block; 21-Inner arc surface; 22-Notch; 23-Returning slope; 24-Protrusion; 25-Pressure slope; 26-Guide hole;

[0041] 3-Lock tongue; 31-First unlocking ramp; 32-Second turning ramp;

[0042] 4-Moving shaft; 41-Pressing inclined surface; 42-Second unlocking inclined surface; 43-First rotating inclined surface; 44-Unlocking boss;

[0043] 5-Cage; 51-Ling; 511-Step surface;

[0044] 6-Lock spring;

[0045] 7-Limit block;

[0046] 8-shaped wheel;

[0047] 9-Bushing;

[0048] 10-Cryptographic components. Detailed Implementation

[0049] To further explain the technical solution of this utility model, specific embodiments are described in detail below. Unless otherwise specified, the up and down directions mentioned below refer to the perspective corresponding to each sectional view (which is also the front view of the key wheel combination lock), and do not limit the actual orientation of each component after the lock is installed, but only express the relative relationship.

[0050] refer to Figure 1-20 As shown, this utility model discloses an operating mechanism for a combination lock, including a combination component 10, a knob 1, a movable block 2, and a locking tongue 3;

[0051] The knob 1 rotates and engages with the circumference of the password component 10;

[0052] The movable block 2 slides along the axis of the knob 1 and fits into the inner wall of the knob 1;

[0053] The locking tongue 3 slides along the axis of the knob 1 and fits into the inner wall of the knob 1, and passes through the movable block 2;

[0054] Password assembly 10 includes a movable shaft 4 and a retainer 5 that move radially along the knob 1 (driven by their respective spring forces); Reference Figure 8 In the direction shown, the end of the movable shaft 4 is movably engaged above the movable block 2, and contacts the locking tongue 3 and presses down the movable block 2 as the knob 1 is rotated; the end of the retainer 5 movably abuts against the inner arc surface 21 of the movable block 2, and extends out when the movable block 2 is pressed down by the movable shaft 4 to achieve a movable engagement on the upper surface of the movable block 2; the end of the inner arc surface 21 is provided with a notch 22, and a push-back slope 23 is provided between the notch 22 and the inner arc surface 21. When the end of the retainer 5 is inserted into the notch 22, the movable block 2 is reset, and when the knob 1 is reset, the push-back slope 23 resets the retainer 5.

[0055] Through the above solution, this utility model sets a movable block 2 on the inner wall of the knob 1 and allows the latch 3 to pass through the movable block 2. After the knob 1 is rotated, the latch 3 can contact or separate from the end of the movable shaft 4 to achieve the conventional locking and unlocking function. Importantly, during the movement of the movable shaft 4 relative to the latch 3, it can press down the movable block 2 to unlock the retainer 5. The radial movement of the retainer 5 switches the password component 10 of the dial lock to the password setting state. At this time, the retainer 5 continuously presses down on the movable block 2 to prevent it from resetting and maintains the password setting state. When the knob 1 is rotated to the unlocking direction, the notch 22 at the end of the inner arc surface 21 can ensure the reset of the movable block 2. Then, when the knob 1 is rotated in reverse, the push-back inclined surface 23 pushes the retainer 5 back to reset, so that the lock stably exits the password setting state and will not change the password again due to the user accidentally touching the dial. The structure design of the password setting in the lock is more stable.

[0056] The following are specific embodiments of the present invention.

[0057] In a combination lock, the combination component 10 is generally fixed relative to the lock face and installed on the door leaf of the cabinet. Therefore, the user can directly grasp the knob 1 to rotate the knob 1. When the knob 1 is rotated, the angles of the face and the combination component 10 will not change.

[0058] The main body shape of the aforementioned movable block 2 matches the inner wall surface of the knob 1, i.e., it is arc-shaped. The inner edge of the movable block 2 protrudes to form an arc-shaped protrusion 24; the inner side of the protrusion 24 is flush with the inner arc surface 21, and its outer side is provided with a pressure-receiving slope 25. Between the two ends of the protrusion 24, the pressure-receiving slope 25 gradually rises along the unlocking direction of the lock; the end of the movable shaft 4 is provided with a downward pressure slope 41 that is movably engaged with the pressure-receiving slope 25. Thus, during the unlocking process, as the knob 1 is rotated, the movable shaft 4 can gradually press down the movable block 2 until the inner arc surface 21 is lower than the end of the retainer 5. The retainer 5 extends under the drive of the retainer spring and presses on the movable block 2. In this state and subsequent states, the retainer 5 will remain in the extended state until the end of the retainer 5 enters the notch 22, i.e., the lock remains in the state where the bushing is disengaged from the dial.

[0059] The latch 3 has a first unlocking ramp 31 on the side facing the unlocking direction. The first unlocking ramp 31 is used to push the end of the movable shaft 4 to compress the movable shaft spring. When the user enters the correct password in the password component 10, turning the knob 1 will push the movable shaft 4 through the first unlocking ramp 31 of the latch 3 to unlock the device.

[0060] Furthermore, the end of the aforementioned movable shaft 4 is provided with a second unlocking ramp 42 opposite to the first unlocking ramp 31, so that the bolt 3 can push the movable shaft 4 more smoothly and the operation feel is better.

[0061] Secondly, the end of the aforementioned movable shaft 4 is provided with a first rotating inclined surface 43 on the opposite side of the second unlocking inclined surface 42. The first rotating inclined surface 43 is used to push the upper end of the locking tongue 3 to compress the locking tongue spring 6.

[0062] Furthermore, the aforementioned latch 3 is provided with a second rotating inclined surface 32 on the opposite side of the first unlocking inclined surface 31, which allows the movable shaft 4 to push the latch 3 more smoothly and provides a better operating feel.

[0063] The aforementioned movable block 2 is reset by a spring located between the movable block 2 and the knob 1, and a guide mechanism is provided between the movable block 2 and the knob 1.

[0064] Furthermore, the aforementioned guiding mechanism includes a guide hole 26 disposed in the movable block 2 and a guide post 11 disposed in the knob 1.

[0065] Meanwhile, a limiting block 7 for limiting the movable block 2 is installed on the inner wall of the knob 1.

[0066] The end of the aforementioned retainer 5 is provided with a tongue 51 that movably abuts against the inner arc surface 21. The tongue 51 is stepped. When the movable block 2 is pressed down to a position lower than the stepped surface 511 of the tongue 51, the retainer 5 extends and the stepped surface 511 of the tongue 51 engages with the plane of the upper surface of the movable block 2.

[0067] The working principle of this utility model is as follows:

[0068] (1) Locked state

[0069] See Figure 7-8 The dial 8 rotates together with the bushing 9. When the dial 8 is in the incorrect combination position, the unlocking groove of the bushing 9 cannot align with the unlocking boss 44 of the movable shaft 4. The unlocking boss 44 of the movable shaft 4 presses against the outer wall of the bushing 9, preventing the movable shaft 4 from moving in the unlocking direction. At this time, turning the knob 1 causes the bolt 3 to move, and the first unlocking ramp 31 on the bolt 3 contacts the second unlocking ramp 42 on the movable shaft 4. Under the action of force, the movable shaft 4 is forced to move in the unlocking direction, but because the movable shaft 4 is restricted from moving in the unlocking direction, it is stuck on the ramp, thus realizing the locking function of the lock. When the dial 8 rotates to the correct combination position, the unlocking boss 44 of the movable shaft 4 aligns with the unlocking groove of the bushing 9, and the movable shaft 4 can move in the unlocking direction. At this time, turning the knob 1 causes the first unlocking ramp 31 of the bolt 3 to push the rotating shaft 4 in the unlocking direction, thus completing the unlocking action.

[0070] (2) Unlocking process

[0071] See Figure 9-12As the rotating shaft 4 moves, the downward pressing slope 41 of the rotating shaft 4 presses against the pressure-receiving slope 25 of the movable block 2, causing the movable block 2 to sink. During this process, the tongue 51 of the retainer 5 first rests against the inner arc surface 21 of the movable block 2; after the movable block 2 sinks to its position, the tongue 51 of the retainer 5 disengages from the inner arc surface 21 of the movable block and pops out under the action of the retainer spring; thereafter, the stepped surface 511 of the tongue 51 presses against the upper surface of the movable block 2. At the same time, as the tongue 51 extends, the retainer 5 moves with the bushing 9, and the bushing 9 disengages from the character wheel 8.

[0072] (3) Reset password

[0073] See Figure 13-16 The bushing 9 is disengaged from the dial wheel 8, and the unlocking boss 44 of the movable shaft 4 is located in the unlocking groove of the bushing 9. The bushing 9 cannot be driven to rotate, so the dial wheel 8 cannot drive the bushing 9 to rotate synchronously when it rotates. At the same time, under the action of the force-applying mechanism of the dial wheel combination lock (such as a magnetic attraction device, which is existing technology), the dial wheel 8 is driven to rotate by the force of the mechanism, realizing the initialization of the password, which is generally called clearing (referring to restoring to the preset initial password, which is usually 0000, so it is commonly referred to as clearing).

[0074] (4) Set a password

[0075] See Figure 17-20 When knob 1 continues to rotate to its final position, the tongue 51 of retainer 5 disengages from the upper surface of movable block 2 and falls into the notch 22 of movable block 2. Movable block 22 then springs back to its original position under the action of a spring. Simultaneously, the force-applying mechanism no longer acts on the character wheel 8, allowing it to rotate freely. Furthermore, bushing 9 remains disengaged from character wheel 8, enabling the setting of a new password. After setting the new password, knob 1 is rotated back. The push-back slope 23 of movable block 2 contacts the tongue 51 of retainer 5, forcing retainer 5 to retract against the spring force, causing bushing 9 to engage with character wheel 8, thus achieving linkage between character wheel 8 and bushing 9. During this rotation, the force-applying mechanism acts on character wheel 9 again, scrambling the set password and achieving an automatic scrambling function.

[0076] During the rotation process, when the first rotating inclined surface 43 of the movable shaft 4 contacts the second rotating inclined surface 32 of the latch 3, the latch 3 retracts under the interaction force of the inclined surfaces, overcoming the force of the latch spring 6; until the movable shaft 4 passes the latch 3, the latch 3 pops out under the action of the spring force; when the knob 1 can no longer rotate, the lock returns to the initial state.

[0077] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. An operating mechanism for a combination lock, characterized in that: Includes keypad components, knobs, moving blocks, and bolts; The knob rotates to fit around the periphery of the password component; The movable block slides along the axial direction of the knob on the inner wall of the knob; The locking tongue slides along the axial direction of the knob, engages with the inner wall of the knob, and passes through the movable block; The keypad assembly includes a movable shaft and a retainer that move radially along the knob; the end of the movable shaft is movably engaged above the movable block, and contacts the latch and presses down on the movable block as the knob rotates; the end of the retainer movably abuts against the inner arc surface of the movable block, and extends out when the movable block is pressed down by the movable shaft to achieve a movable engagement on the upper surface of the movable block; the end of the inner arc surface is provided with a notch, and a push-back slope is provided between the notch and the inner arc surface; when the end of the retainer is inserted into the notch, the movable block resets; when the knob resets, the push-back slope resets the retainer.

2. The operating mechanism of the digit lock as described in claim 1, characterized in that: The inner edge of the movable block protrudes to form an arc-shaped protrusion; the inner side of the protrusion is flush with the inner arc surface, and its outer side is provided with a pressure-receiving slope. Between the two ends of the protrusion, the pressure-receiving slope gradually rises along the unlocking direction; the end of the movable shaft is provided with a downward pressure slope that movably engages with the pressure-receiving slope.

3. The operating mechanism of the digit lock as described in claim 1, characterized in that: The latch has a first unlocking ramp on the side facing the unlocking direction. The first unlocking ramp is used to push the end of the movable shaft to compress the movable shaft spring.

4. The operating mechanism of the combination lock as described in claim 3, characterized in that: The end of the movable shaft is provided with a second unlocking ramp that is opposite to the first unlocking ramp.

5. The operating mechanism of the digit lock as described in claim 4, characterized in that: The end of the movable shaft is provided with a first rotating inclined surface on the opposite side of the second unlocking inclined surface. The first rotating inclined surface is used to push the upper end of the latch to compress the latch spring.

6. The operating mechanism of the digit lock as described in claim 5, characterized in that: The latch has a second rotating ramp on the opposite side of the first unlocking ramp.

7. The operating mechanism of the digit lock as described in claim 1, characterized in that: The movable block is reset by a spring disposed between the movable block and the knob, and a guide mechanism is provided between the movable block and the knob.

8. The operating mechanism of the digit lock as described in claim 7, characterized in that: The guiding mechanism includes a guide hole disposed in the movable block and a guide post disposed in the knob.

9. The operating mechanism of the digit lock as described in claim 7, characterized in that: The inner wall of the knob is fitted with a limiting block for limiting the movement of the movable block.

10. The operating mechanism of the digit lock as described in claim 1, characterized in that: The end of the retainer is provided with a tongue that movably abuts against the inner arc surface. The tongue is stepped. When the movable block is pressed down to a position lower than the stepped surface of the tongue, the retainer extends and the stepped surface of the tongue engages with the upper surface of the movable block.

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