Operation mechanism of push-button combination lock

Abstract

Disclosed in the present invention is an operation mechanism of a push-button combination lock. By simply using a matching key, operations related to a password such as code searching and code changing can be carried out, thereby improving the security performance of a lock. The operation mechanism comprises: a handle that fits with a shell; a sliding-rod shifting block, a rotary disk, a lever-plate shifting block, a lever plate and a function knob, which are arranged in the shell; and a lock cylinder mounted in the handle, wherein the lock cylinder, the sliding-rod shifting block, the rotary disk and the lever-plate shifting block are collinear; the sliding-rod shifting block and the rotary disk are coaxially connected to the handle; the lock cylinder passes through the sliding-rod shifting block and is coaxially connected to the lever-plate shifting block in an unlockable manner, and the lock cylinder is unlocked after a key is inserted and rotated; a locking plate and a sliding rod are respectively driven by springs to radially move towards the handle; the lever plate is arranged on a peripheral surface of the lever-plate shifting block and is opposite the locking plate; a peripheral surface of the sliding-rod shifting block is opposite the sliding rod and is provided with a blocking wall for limiting the stroke of the lever plate; the sliding rod is in sliding fit with the lever plate, and the stroke of the sliding rod is limited by the lever plate; and the function knob rotationally penetrates the shell and is provided with a first cam for adjusting the stroke of the lever plate.

Description

Operating mechanism of key combination lock Technical Field

[0001] The present invention relates to the technical field of key-press password locks, in particular to an operating mechanism of a key-press password lock. Background Art

[0002] The push-button password lock combines the advantages of electronic locks and key mechanical locks - users can use the password to unlock the lock without carrying keys with them, which is more convenient. At the same time, the lock itself relies on the linkage relationship of a purely mechanical structure to achieve various functions. Its functions are more stable and there is no risk of the lock being scrapped due to electronic failure.

[0003] Prior to the filing date of this case, the applicant of this case improved the technical solution of the utility model patent "A code-changing structure for a key-operated password lock" (publication number CN213683571U), which has the disadvantage that the code-changing structure requires two hands to change the password, resulting in difficulty in operation and poor user experience. The patent was applied for the invention patent "Mechanical door lock and its operating mechanism" (publication number CN116146045A), which simplifies the operations of unlocking, searching for codes and changing codes, allowing users to operate with one hand, which is more convenient.

[0004] However, the technical solution of the above invention patent has the following defects in practical application:

[0005] (1) During operations such as unlocking, searching for codes, and changing codes, the door handle needs to be rotated to different angles, and the lock tongue driven by the door handle also needs to be rotated to corresponding angles. When installing the lock, the requirements for the active travel of the door handle and the lock tongue are higher, and the lock is difficult to use in some small space installation scenarios. At the same time, the corresponding angles for operations such as searching for codes and changing codes are located after the corresponding angles for unlocking, which is difficult for users to grasp. Frequent trial and error are required to master the methods of searching for codes and changing codes, resulting in poor user experience.

[0006] (2) In terms of security, as long as the user can operate the function knob (for example, if the cabinet door is not closed in time after the password is scrambled, the function knob is in an operable state), even if the user does not know the correct password of the lock, he or she can still perform password-related operations such as searching for the code and changing the code. This is not restricted by any authority and there is a risk of malicious password changes, which reduces the security level of the lock. It is especially not suitable for public places. Summary of the Invention

[0007] The purpose of the present invention is to provide an operating mechanism for a key-operated password lock to solve the defects of the existing technical solutions. Only by using an adapted key can password-related operations such as code searching and code changing be performed, thereby improving the safety performance of the lock.

[0008] In order to achieve the above object, the solution of the present invention is:

[0009] A key combination lock operating mechanism comprises a handle matched with a housing of the key combination lock, a slide bar toggle block, a rotating disk, a top plate toggle block, a top plate and a function knob arranged in the housing, and a lock core installed in the handle; the lock core, the slide bar toggle block, the rotating disk and the top plate toggle block are coaxially arranged in sequence; the slide bar toggle block and the rotating disk are coaxially connected to the handle; the lock core is passed through the slide bar toggle block and is coaxially connected to the top plate toggle block in an unlockable manner, and is unlocked after the lock core is inserted into the key and rotated; the lock plate and the slide bar of the key combination lock are respectively provided with a first spring and a second spring located in the housing. To drive the locking plate and the sliding rod to move radially toward the handle respectively; the top plate is arranged on the circumferential surface of the top plate toggle block and is arranged opposite to the locking plate; the circumferential surface of the sliding rod toggle block is arranged opposite to the sliding rod, and is provided with a retaining wall that abuts the sliding rod and limits the stroke of the top plate in the normal initial state of the key password lock; the sliding rod is slidably matched with the top plate and is limited by the top plate in the stroke of radial movement toward the handle; the function knob is rotatably matched on the shell, and one end of the function knob is provided with a first cam that movably cooperates with the top plate, and when the first cam rotates, the stroke of the top plate is adjusted to adjust the stroke of the locking plate.

[0010] A mounting hole is provided in the axial direction of the handle; the lock core includes a lock core fixing frame provided in the mounting hole, a lock core head installed in the lock core fixing frame, and a lock core connecting rod installed outside the lock core fixing frame and coaxially connected to the lock core head, the lock core connecting rod is passed through a fixing plate enclosed in the port of the lock core fixing frame and is coaxially connected to the top plate toggle block in an unlockable manner; the sliding rod toggle block is fixed on the side of the fixing plate facing away from the lock core head.

[0011] The top plate toggle block is provided with a rotating groove for rotating cooperation with the rotating disk, and a first notch is provided on the periphery of the rotating groove; a first sliding groove is provided in the radial direction of the rotating disk, a sliding pin is slidably fitted in the first sliding groove, and a second notch is provided at one end of the first sliding groove, and the end head of the sliding pin is movably passed through the second notch and the first notch; a second cam is coaxially connected to the inner end of the lock core, and the second cam is transmission-connected to the sliding pin, for driving the sliding pin to telescopically cooperate at the first notch to realize the unlockable coaxial connection between the lock core and the top plate toggle block.

[0012] Preferably, the operating mechanism further comprises a third spring provided between the other end of the first sliding groove and the sliding pin, and a cam groove for rotationally engaging with the second cam is provided on the surface of the sliding pin.

[0013] The top plate is provided with a second sliding groove for sliding engagement of the sliding rod, and the end of the sliding rod is provided with a rod head that slides into the second sliding groove, a step is formed between the rod head and the end face of the sliding rod, and the step abuts against the surface of the top plate.

[0014] The operating mechanism of the push-button password lock also includes a limiting buckle arranged opposite to the sliding rod, and a fourth spring acting on the limiting buckle, under the action of the fourth spring, the lower plane of the limiting buckle abuts against the surface of the sliding rod; when the top plate and the sliding rod simultaneously overcome the second spring and the first spring and move radially with the handle on their backs, the lower plane will slide out of the plane of the sliding rod surface and abut against the step surface of the sliding rod, and the side plane of the buckle coincides with the side section of the step surface, so that the sliding rod cannot be reset and the top plate is reset normally in the unlocked state; an upper inclined surface and an end inclined surface are provided between the contact surface of the top plate and the limiting buckle, which are used to lift the limiting buckle when the top plate is reset so that the side plane is separated from the side section.

[0015] The rotation process of the function knob is provided with a first angle, a second angle and a third angle, and the distance between the top plate and the circumference of the top plate toggle block is respectively limited by the first cam: when the function knob is at the first angle, the distance between the top plate and the top plate toggle block is the maximum value, and the locking plate and the sliding rod cannot move to the position of retrieving the password; when the function knob is at the second angle, the distance between the top plate 6 and the top plate toggle block along the handle is the middle value, the locking plate and the sliding rod can move to the position of retrieving the password, and the locking plate cannot move to the position of setting the password; when the function knob is at the third angle, the distance between the top plate and the top plate toggle block is the minimum value, and the locking plate can move to the position of setting the password.

[0016] The circumferential surface of the top sheet toggle block is provided with a cam wall and a third notch; the top sheet is provided with a top sheet tongue portion arranged opposite to the circumferential surface of the top sheet toggle block, and the top sheet tongue portion abuts against the retaining wall and / or the circumferential surface of the top sheet toggle block under the drive of the locking sheet, and movably cooperates with the cam wall or the third notch as the top sheet toggle block rotates.

[0017] Preferably, a guide slope is provided at the connection between the third notch and the cam wall to facilitate the tongue of the top sheet to enter and exit the third notch.

[0018] Preferably, hanging walls are provided on both sides of the retaining wall at a height corresponding to the top sheet tongue, and the hanging walls do not contact the sliding rod; when the sliding rod toggle block passes over the top sheet tongue as the handle rotates, the top sheet tongue enters the third notch under the drive of the locking plate, and the side walls of the top sheet tongue limit the rotation and resetting of the sliding rod toggle block.

[0019] The operating mechanism of the key combination lock further comprises an elastic member for driving the handle to reset.

[0020] After adopting the above technical solution, the present invention has the following technical effects:

[0021] The present invention realizes locking and unlocking functions through the linkage relationship between the top plate toggle block, the top plate and the lock plate, and the key password mechanism of the key password lock, and realizes the linkage between the handle and the lock plate and the sliding rod of the key password lock through the slide bar toggle block, the top plate toggle block and the top plate, and the stop wall of the slide bar toggle block and the first cam of the function knob all limit the travel of the top plate and the lock plate, and the travel of the sliding rod is limited by the top plate, so that the lock plate cannot move to the code-seeking position or the code-changing position in a normal initial state. Only when the key is inserted into the lock cylinder, the handle and the slide bar toggle block can be rotated until the stop wall does not limit the travel of the top plate. At the same time, the top plate toggle block does not rotate, so that the function knob can be rotated and the top plate is driven to the code-seeking position or the code-changing position by the first cam, and then the lock plate and the sliding rod are linked to the code-seeking position or the code-changing position, thereby realizing the code-seeking function and the code-changing function of the key password lock;

[0022] ② The present invention uses the key that matches the lock core as the management authority. Without the key, the lock's code search function, code change function, and other operations cannot be used, thereby improving the security performance of the lock and facilitating the management of the lock. It is particularly suitable for locks installed in public places;

[0023] ③ In the code-searching and code-changing operations of the present invention, when the slide bar toggle block rotates to the point where the retaining wall does not limit the travel of the top plate, the handle is also rotated to the unlocking angle, so that the unlocking, code-searching, code-changing and other operations are all performed at the same angle, and each function is switched by the function knob, making the user's operation simpler and faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a perspective view of a specific embodiment of the present invention.

[0025] FIG2 is an exploded view of a specific embodiment of the present invention.

[0026] FIG3 is a perspective view of a sliding rod toggle block according to a specific embodiment of the present invention.

[0027] FIG4 is a perspective view of a rotating disk according to a specific embodiment of the present invention.

[0028] FIG5 is a three-dimensional diagram of a top sheet toggle block according to a specific embodiment of the present invention.

[0029] FIG6 is a perspective view of the top sheet according to a specific embodiment of the present invention.

[0030] FIG7 is a second perspective view of the top sheet according to a specific embodiment of the present invention.

[0031] FIG8 is a first perspective view of a function knob according to a specific embodiment of the present invention.

[0032] FIG9 is a second perspective view of the function knob according to a specific embodiment of the present invention.

[0033] FIG10 is a perspective view of a sliding rod according to a specific embodiment of the present invention.

[0034] FIG11 is a schematic diagram of the synchronization state of the locking plate toggle block and the rotating disk according to a specific embodiment of the present invention.

[0035] FIG12 is a schematic diagram of the asynchronous state of the locking plate toggle block and the rotating disk according to a specific embodiment of the present invention.

[0036] FIG13 is a front view of a normal initial state of a specific embodiment of the present invention.

[0037] FIG14 is a cross-sectional view of a normal initial state of a specific embodiment of the present invention.

[0038] FIG15 is a back view of a normal initial state of a specific embodiment of the present invention.

[0039] FIG16 is a front view of the unlocking completion state of a specific embodiment of the present invention.

[0040] FIG17 is a cross-sectional view of the unlocking completion state of a specific embodiment of the present invention.

[0041] FIG18 is a rear view of the unlocking completion state of a specific embodiment of the present invention.

[0042] FIG19 is a front view of a password recovery state according to a specific embodiment of the present invention.

[0043] FIG20 is a cross-sectional view of a password recovery state according to a specific embodiment of the present invention.

[0044] FIG21 is a back view of the password recovery state according to a specific embodiment of the present invention.

[0045] FIG22 is a front view of the password setting state according to a specific embodiment of the present invention.

[0046] FIG23 is a cross-sectional view of a password setting state according to a specific embodiment of the present invention.

[0047] FIG24 is a back view of the password setting state according to a specific embodiment of the present invention.

[0048] FIG25 is a front view of the emergency unlocking state of a specific embodiment of the present invention.

[0049] FIG26 is a cross-sectional view of an emergency unlocking state according to a specific embodiment of the present invention.

[0050] FIG27 is a rear view of the emergency unlocking state of a specific embodiment of the present invention.

[0051] FIG28 is a three-dimensional diagram of some parts after assembly of a specific embodiment of the present invention.

[0052] FIG29 is a three-dimensional diagram of a buckle according to a specific embodiment of the present invention.

[0053] Description of Figure Numbers:

[0054] 1-shell; 11-lock shell; 12-lock body; 121-key slot; 13-bottom plate; 14-pressing plate; 15-pressing block; 16-limiting buckle; 161-end bevel; 162-side plane; 163-lower plane; 2-handle; 21-mounting hole; 3-sliding rod toggle block; 31-blocking wall; 32-insertion hole; 33-hanging wall; 4-rotating plate; 41-boss; 42-first sliding groove; 421-positioning groove; 43-second notch; 44-connecting part; 5-top plate toggle block; 51-rotating groove; 52-first notch; 53-cam wall; 54-third notch; 55-guide bevel; 6-top plate; 61-second sliding groove; 62-top plate tongue; 63-upper bevel; 7-function rotary Button; 71-first cam; 72-operating part; 8-lock cylinder; 81-lock cylinder fixing frame; 82-lock cylinder head; 83-lock cylinder connecting rod; 9-locking plate; 10-sliding rod; 101-rod head; 102-step; 103-fixed buckle; 104-movable buckle; 105-step surface; 106-side section; 20-first spring; 30-second spring; 40-fixing plate; 50-dust cover; 60-sliding pin; 601-cam groove; 70-second cam; 80-third spring; 90-square rod; 100-torsion spring; 200-button assembly; 2001-reset spring; 2002-button rod; 2003-button spring; 2004-button cap; 300-fourth spring. Modes for Carrying Out the Invention

[0055] With reference to Figures 1 to 27, the present invention discloses an operating mechanism for a key combination lock, comprising a handle 2 rotatably engaged with a housing 1 of the key combination lock, a slide bar toggle block 3, a rotating disk 4, a top plate toggle block 5, a top plate 6, and a function knob 7 disposed within the housing 1, and a lock cylinder 8 mounted within the handle 2;

[0056] The lock cylinder 8, the slide bar toggle block 3, the rotating disk 4 and the top plate toggle block 5 are coaxially arranged in sequence; the slide bar toggle block 3, the rotating disk 4 and the handle 2 are coaxially connected to achieve synchronous rotation; the lock cylinder 8 is passed through the slide bar toggle block 3 and is coaxially connected to the top plate toggle block 5 in an unlockable manner, and is unlocked when the key is inserted into the lock cylinder 8 and rotated;

[0057] The lock piece 9 and the sliding rod 10 of the key combination lock are respectively provided with a first spring 20 and a second spring 30 located in the housing 1 to respectively drive the lock piece 9 and the sliding rod 10 to move radially toward the handle 2;

[0058] The top plate 6 is arranged on the circumferential surface of the top plate toggle block 5 and is arranged opposite to the lock plate 9; the circumferential surface of the slide bar toggle block 3 is arranged opposite to the slide bar 10 and is provided with a retaining wall 31 that abuts the slide bar 10 and limits the travel of the top plate 6 in the normal initial state of the key combination lock; the slide bar 10 is slidably engaged with the top plate 6 and is limited by the top plate 6 in the travel of radial movement toward the handle 2;

[0059] The function knob 7 is rotatably engaged with the housing 1 , and a first cam 71 movably engaged with the top plate 6 is provided at one end thereof. When the first cam 71 rotates, the stroke of the top plate 6 is adjusted to adjust the stroke of the locking plate 9 .

[0060] Through the above scheme, the present invention realizes the locking and unlocking functions through the linkage relationship between the top plate toggle block 5, the top plate 6 and the lock plate 9 and the key password mechanism of the key password lock, and realizes the linkage between the handle 2 and the lock plate 9 and the sliding rod 10 of the key password lock through the slide bar toggle block 3, the top plate toggle block 5 and the top plate 6, and the retaining wall 31 of the slide bar toggle block 3 and the first cam 71 of the function knob 7 both limit the stroke of the top plate 6 and the lock plate 9, and the stroke of the sliding rod 10 is limited by the top plate 6, so that the lock plate 9 cannot move to the code-seeking position or the code-changing position in the normal initial state, and can only be rotated when the key is inserted into the lock cylinder 8 until the handle 2 and the slide bar toggle block 3 are rotated to the retaining wall 31 without limiting the stroke of the top plate 6. At the same time, the top plate toggle block 5 does not rotate, so that the function knob 7 can be rotated The lock is locked and unlocked when the key is engaged, and the lock is unlocked when the key is engaged.

[0061] The following shows a specific implementation of the above-mentioned operating mechanism.

[0062] The handle 2 is provided with a mounting hole 21 in the axial direction. The lock core 8 includes a lock core fixing frame 81 provided in the mounting hole 21, a lock core head 82 installed in the lock core fixing frame 81, and a lock core connecting rod 83 installed outside the lock core fixing frame 81 and coaxially connected to the lock core head 82. The lock core connecting rod 83 is passed through a fixing plate 40 enclosed in the end of the lock core fixing frame 81 and is coaxially connected to the top plate toggle block 5 in an unlockable manner. The slide bar toggle block 3 is fixed to the side of the fixing plate 40 facing away from the lock core head 82 by screws to achieve coaxial connection with the lock core fixing frame 81 and the handle 2. The slide bar toggle block 3 can rotate synchronously with the handle 2. The lock core head 82 of this structure can be independent of the lock core 8 as a whole for replacement. When replacing the lock core 8, there is no need to disassemble the entire lock core 8, which makes the operation simpler. In this embodiment, the above-mentioned sliding rod toggle block 3 and fixed plate 40 are both provided with a through hole for the lock core connecting rod 83 to pass through; the outer port of the mounting hole 21 can be installed with a dust cover 50 for shielding and dust prevention, and the dust cover 50 is detachably installed with the handle 2 by magnetic attraction.

[0063] Furthermore, the surface of the slide bar toggle block 3 facing the rotating disk 4 is provided with a plurality of sockets 32, and the rotating disk 4 is provided with bosses 41 embedded in the sockets 32. The rotating disk 4 and the slide bar toggle block 3 are coaxially connected through the cooperation of a plurality of pairs of bosses 41 and the sockets 32, so that the handle 2, the slide bar toggle block 3 and the rotating disk 4 can finally rotate synchronously.

[0064] The above-mentioned top plate toggle block 5 is provided with a rotating groove 51 for rotating cooperation of the rotating disk 4, and a first notch 52 is provided on the periphery of the rotating groove 51; a first sliding groove 42 is provided in the radial direction of the rotating disk 4, and a sliding pin 60 is slidably fitted in the first sliding groove 42, and a second notch 43 is provided at one end of the first sliding groove 42, and the end of the sliding pin 60 is movably passed through the second notch 43 and the first notch 52; the inner end of the lock cylinder 8 (that is, the above-mentioned lock cylinder connecting rod 83) is coaxially connected with a second cam 70, and the second cam 70 is transmission-connected with the sliding pin 60, for driving the sliding pin 60 to telescopically cooperate at the first notch 52, thereby realizing the coaxial connection between the lock cylinder 8 and the top plate toggle block 5 that can be unlocked, that is, realizing a releasable coaxial connection between the handle 2 and the top plate toggle block 5 - when the key is inserted and rotated until the end of the sliding pin 7 is out of the first notch 52, rotating the handle 2 will not drive the top plate toggle block 5 to rotate synchronously, and it will also be impossible to push the top plate 6, lock plate 9 and other accessories.

[0065] Furthermore, the operating mechanism further includes a third spring 80 disposed between the other end of the first sliding groove 42 and the sliding pin 60. The surface of the sliding pin 60 is provided with a cam groove 601 for rotationally engaging the second cam 70. Inserting a key and rotating the lock cylinder 8 causes the second cam 70 to rotate, thereby changing the direction of its long axis. As shown in Figures 11 and 12, when the long axis of the second cam 70 is perpendicular to the first sliding groove 42, the third spring 80 pushes the sliding pin 60 toward the first notch 52, causing the end of the sliding pin 60 to fit into the first notch 52. When the long axis of the second cam 70 is collinear with the first sliding groove 42, the second cam 70 presses against the sidewall of the cam groove 601 and compresses the sliding pin 60 back into the first sliding groove 42, causing the end of the sliding pin 60 to disengage from the first notch 52 and compressing the third spring 80 to store energy, allowing the sliding pin 60 to automatically return to its original position when the lock cylinder 8 is subsequently reset. In this embodiment, a positioning groove 421 for positioning and cooperating with the end of the third spring 80 is provided at the other end of the first sliding groove 42 , so as to stabilize the installation position of the third spring 80 .

[0066] The rotating disk 4 is provided with a connecting portion 44 that rotatably penetrates the top plate toggle block 5. The connecting portion 44 is connected to the square rod 90 of the key combination lock to drive the lock tongue of the key combination lock to rotate synchronously to realize the opening and closing of the lock.

[0067] The above-mentioned top plate 6 is provided with a second sliding groove 61 for the sliding rod 10 to slide with, and the end of the sliding rod 10 is provided with a rod head 101 that slides and fits in the second sliding groove 61. A step 102 is formed between the rod head 101 and the end face of the sliding rod 10, and the step 102 abuts against the surface of the top plate 6, so that the sliding rod 10 is restricted by the top plate 6 in the radial movement toward the handle 2: when the sliding rod 10 moves radially toward the handle 2 under the action of the second spring 30, it will be stuck on the surface of the top plate 6 and cannot move further; when the top plate 6 moves radially with the handle 2 on its back under the action of the top plate toggle block 5, it will synchronously drive the sliding rod 10 to move radially with the handle 2 on its back, so that the locking plate 9 and the sliding rod 10 can be reset at the same time by turning the function knob 7 to drive the top plate 6 to move.

[0068] Furthermore, referring to Figures 28 and 29, the present invention further includes a limiting buckle 16 disposed opposite the sliding rod 10, and a fourth spring 300 acting on the limiting buckle 16. Under the action of the fourth spring 300, the lower surface 163 of the limiting buckle 16 abuts the surface of the sliding rod 10. When the top plate 6 and the sliding rod 10 simultaneously overcome the second spring 30 and the first spring 20 and move radially with the handle 2, the lower surface 163 slides out of the plane of the sliding rod 10 and abuts the stepped surface 105 of the sliding rod 10. At this point, the side surface 162 of the buckle 16 coincides with the side section 106 of the stepped surface 105. After unlocking, the top plate 6 and the sliding rod 10, under the action of the second spring 30 and the first spring 20, respectively, simultaneously tend to return to their original position. However, due to the aforementioned reasons, the side section 106 of the sliding rod 10 is blocked by the side plane 162 of the buckle 16, preventing it from returning to its original position. Meanwhile, the top plate 6, unobstructed, can return to its original position under the action of the second spring 30. During this return, the upper inclined surface 63 of the top plate 6 gradually contacts the end inclined surface 161 of the limiting buckle 16. As the top plate 6 continues to move laterally to return to its original position, the limiting buckle 16 is vertically raised by the interaction of the inclined surfaces until the upper inclined surface 63 completely disengages from the end inclined surface 161 and the lower plane 163 re-contacts the surface of the sliding rod 10. Accordingly, the side plane 162 separates from the side section 106, creating a height difference. This eliminates the return resistance experienced by the sliding rod 10. That is, after the top plate 6 has completely returned to its original position, the sliding rod 10 will also return to its original position after a certain delay. This time difference ensures that the key assembly 200 of the subsequent lock can be successfully reset.

[0069] The other end of the function knob 7 is provided with an operating portion 72 for user operation. This allows the function knob 7 to be rotated manually or with a tool, or the operating portion 72 can be linked to other conveniently operated accessories of the lock. In this embodiment, the operating portion 72 extends through the mounting surface of the housing 1, that is, the operating portion 72 is located on the back of the key combination lock. Operation to switch the key combination lock state (normal, code search, code change) can only be performed from the inside of the locked object (such as a door panel), greatly improving the key combination lock's security level.

[0070] The definitions of the various strokes of the key password lock are as follows: the rotation process of the above-mentioned function knob 7 is set with a first angle, a second angle and a third angle, and the distance between the top plate 6 and the circumference of the top plate toggle block 5 is limited by its first cam 71: when the function knob 7 is at the first angle, the first cam 71 pushes the top plate 6 radially along the handle 2 to the position where the distance between the top plate 6 and the top plate toggle block 5 is the maximum value, at which time the locking plate 9 and the sliding rod 10 are restricted from moving to the position for retrieving the password; when the function knob 7 is at the second angle, the first cam 71 allows the top plate 6 to move radially along the handle 2 to the position where the distance between the top plate 6 and the top plate toggle block 5 is the middle value (between the maximum value and the minimum value), at which time the locking plate 9 and the sliding rod 10 are allowed to move to the position for retrieving the password but the locking plate 9 cannot move to the position for setting the password; when the function knob 7 is at the third angle, the first cam 71 allows the top plate 6 to move radially along the handle 2 to the position where the distance between the top plate 6 and the top plate toggle block 5 is the minimum value, at which time the locking plate 9 is allowed to move to the position for setting the password. In this embodiment, the first angle, the second angle, and the third angle are the positions where the function knob 7 is rotated to 0°, 90°, and 180°, respectively.

[0071] The circumferential surface of the above-mentioned top sheet toggle block 5 is provided with a cam wall 53 and a third notch 54; the top sheet 6 is provided with a top sheet tongue 62 arranged opposite to the circumferential surface of the top sheet toggle block 5, and the top sheet tongue 62 abuts against the retaining wall 31 and / or the circumferential surface of the top sheet toggle block 5 under the drive of the locking plate 9, and cooperates with the cam wall 53 or the third notch 54 as the top sheet toggle block 5 rotates to realize the linkage between the handle 2 and the locking plate 9. When the cooperation position of the top sheet tongue 62 changes between the cam wall 53 and the third notch 54, the locking plate 9 moves in a straight line. When the top sheet tongue 62 abuts against the retaining wall 31, the top sheet tongue 62 cannot enter the third notch 54, thereby making the top sheet 6, the locking plate 9 and the sliding rod 10 unable to move to the password retrieval or password setting position.

[0072] Furthermore, a guide slope 55 is provided at the connection between the third notch 54 and the cam wall 53 to facilitate the top sheet tongue 62 to enter and exit the third notch 54 .

[0073] At the same time, a hanging wall 33 is provided on both sides of the retaining wall 31 at a height corresponding to the top plate tongue 62, and the hanging wall 33 does not contact the sliding rod 10. When the sliding rod toggle block 3 passes over the top plate tongue 62 as the handle 2 rotates (corresponding to the unlocking angle), the top plate tongue 62 can enter the third notch 54 under the drive of the lock plate 9, and the side walls of the top plate tongue 62 in turn restrict the rotation and reset of the sliding rod toggle block 3, so that the handle 2 cannot be reset and can only maintain the unlocking angle. Thereafter, the user does not need to press the handle 2 to maintain the unlocking angle when performing code search or code change operations, making the user's operation more convenient and labor-saving. The specific operation process is roughly as follows: the user inserts the key into the lock cylinder 8 and rotates the lock cylinder 8 to unlock the travel limit of the top plate 6, then rotates the function knob 7 to the code search angle or code change angle, releases the handle 2, performs the code search or code change operation, and then turns the key to reset the lock cylinder 8. The restriction on the handle 2 can be released by simply turning the function knob 7, and the entire structure is reset.

[0074] The operating mechanism further includes an elastic member for driving the handle 2 to reset, which is preferably a torsion spring 100 installed in the housing 1 .

[0075] The working principle of the above operating mechanism is:

[0076] (1) Function knob 7 is at the first angle (normal unlocking state)

[0077] 1.1 Normal unlocking: Refer to Figures 13 to 15. Enter the correct password and the lock plate 9 can be driven by the top plate 6 to move smoothly. At this time, turn the handle 2 to drive the slide bar toggle block 3 and the top plate toggle block 5 to rotate together; the cam wall 53 on the top plate toggle block 5 drives the top plate 6 to move and links the lock plate 9 and the sliding rod 10. In this way, the handle 2 can be turned to unlock the lock smoothly. The status of the lock is shown in Figures 16 to 18.

[0078] 1.2 Locked state: After the key combination lock is set with a password, if the correct password is not entered, the lock piece 9 is blocked by the key rod 2002 of the key assembly 200 and cannot move smoothly, causing the top piece 6 to be unable to move; at this time, when the handle 2 is turned, the top piece toggle block 5 cannot be linked because it is restricted by the top piece 6, and thus the lock cannot be opened normally.

[0079] 1.3 Emergency unlocking: See Figures 25 to 27. When the password is forgotten, emergency unlocking is required. Insert the key that matches the lock cylinder 8 into the lock cylinder 8, and turn the key to drive the lock cylinder 8 and the second cam 70 to rotate, thereby releasing the linkage between the top plate toggle block 5 and the rotating disk 4; at this time, turn the handle 2, the slide bar toggle block 3, the rotating disk 4 and the handle 2 rotate synchronously, and the top plate toggle block 5 does not rotate. When the rotating disk 4 rotates, it drives and rotates the square rod 90, thereby realizing the emergency unlocking function.

[0080] (2) Function knob 7 is in the second angle (password retrieval state)

[0081] Referring to Figures 19 to 21, first insert the key into the lock cylinder 8 for emergency unlocking, then turn the function knob 7 to the "password retrieval state", and release the handle 2 after turning it to the bottom. Under the elastic force of the first spring 20 and the third spring 30 corresponding to the lock plate 9 and the sliding rod 10, and the top plate 6 is supported by the first cam 71 on the function knob 7, the sliding rod 10 is positioned to the password retrieval position. At this time, press the button cap 2004 of the button assembly 200, and judge whether the number is the set password by the pressable stroke of the button rod 2002 (corresponding to the fixed buckle 103 and the movable buckle 104 of the sliding rod 10).

[0082] At the same time, the side wall of the top plate tongue 62 contacts the hanging wall 33 of the slide bar toggle block 3, preventing the slide bar toggle block 3 from rotating, that is, preventing the handle 2 from rotating, so that the user can take his hand off the handle 2 and perform corresponding operations, which is convenient for use.

[0083] (3) Function knob 7 is at the third angle (password setting state)

[0084] 22 to 24, after retrieving the password, the function knob 7 is turned to the "password setting state", and the handle 2 is released after turning it to the bottom. Under the elastic force of the first spring 20 and the third spring 30 corresponding to the lock plate 9 and the sliding rod 10, and when the top plate 6 is supported by the first cam 71 on the function knob 7, the sliding rod 10 and the top plate 6 are positioned to the password setting position, and the lock plate 9 also retreats to the password setting position under the action of the first spring 20; at this time, the button cap 2004 is pressed, and the button rod 2002 will not be blocked by the lock plate 9, and the button rod 2002 can be pressed to the bottom of the corresponding button groove 121 of the lock body 12. Under the joint action of the inclined surface of the button cap 2004 and the inclined surface at the bottom of the button groove 121, the button rod 2002 will be rotated 90°, thereby switching the "yes" and "no" states of the digital password setting, and completing the new password setting.

[0085] (4) Function knob 7 rotates to the first angle (normal unlocking state)

[0086] After completing the password setting, turn the function knob 7 to the "normal unlocking state". The first cam 71 on the function knob 7 pushes the top plate 6 in the direction of overcoming the elastic force of the first spring 20 and the second spring 30 until the side wall of the top plate tongue 62 is separated from the hanging wall 33 of the slide bar toggle block 3. The slide bar toggle block 3 and the handle 2 return to the initial state under the action of the torsion spring 100, that is, the rotation state after emergency unlocking.

[0087] In addition, referring to Figures 1 and 2, the present invention also discloses a key combination lock, including a shell 1 for assembling the above-mentioned operating mechanism, a locking piece 9 and a sliding rod 10 that cooperate with the operating mechanism, and a key assembly 200 that cooperates with the locking piece 9 and the sliding rod 10; the above-mentioned locking piece 9 and several groups of key assemblies 200 are provided on both sides of the sliding rod 10.

[0088] The specific implementation of the above-mentioned key combination lock is shown below.

[0089] The housing 1 comprises a lock shell 11 and a lock body 12, with a plurality of key slots 121 being provided on the lock body 12; the key assembly 200 comprises a return spring 2001, a key rod 2002, a key spring 2003 and a key cap 2004 which are sequentially fitted into the key slots 121; a press-and-rotate structure (similar to a press switch of a ballpoint pen) is provided between the key cap 2004 and the key rod 2002, and between the key rod 2002 and the key slot 121, which can rotate the key rod 2002 when the key cap 2004 is pressed to the code-changing height, thereby enabling password setting.

[0090] Furthermore, the housing 1 further includes a bottom plate 13 mounted on the lock body 12 for limiting the top plate toggle block 5 , a pressure plate 14 for limiting the sliding rod 10 , and a pressure block 15 for limiting the locking plate 9 .

[0091] The above-mentioned locking piece 9 is reset toward the top plate 6 by relying on the first spring 20 provided in the shell 1, and the sliding rod 10 is reset toward the sliding rod toggle block 3 by relying on the second spring 30 provided in the shell 1; the specific structure of the locking piece 9, the sliding rod 10 and the button assembly 200 to achieve the above-mentioned functions is a disclosed and very mature existing technology in this technical field, and is not the focus of improvement of the present invention, so it will not be elaborated here.

[0092] The above embodiments and drawings do not limit the product form and style of the present invention. 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 invention.

Claims

1. An operating mechanism for a key combination lock, characterized in that: It includes a handle matched with the housing of the key combination lock, a slide rod toggle block, a rotating disk, a top plate toggle block, a top plate and a function knob arranged in the housing, and a lock core installed in the handle; The lock core, the slide bar toggle block, the rotating disk and the top plate toggle block are coaxially arranged in sequence; the slide bar toggle block and the rotating disk are coaxially connected to the handle; the lock core is passed through the slide bar toggle block and is coaxially connected to the top plate toggle block in an unlockable manner, and is unlocked when a key is inserted into the lock core and rotated; The lock piece and the sliding rod of the key combination lock are respectively provided with a first spring and a second spring located in the housing to respectively drive the lock piece and the sliding rod to move radially toward the handle; The top plate is arranged on the circumferential surface of the top plate toggle block and is arranged opposite to the lock plate; the circumferential surface of the slide rod toggle block is arranged opposite to the slide rod and is provided with a stop wall that abuts against the slide rod and limits the travel of the top plate in the normal initial state of the key combination lock; the slide rod is slidably matched with the top plate and is limited by the top plate in the travel of radial movement toward the handle; The function knob is rotatably engaged with the housing, and one end of the function knob is provided with a first cam that movably engages with the top plate. When the first cam rotates, the stroke of the top plate is adjusted to adjust the stroke of the locking plate.

2. The operating mechanism of the key combination lock according to claim 1, characterized in that: A mounting hole is provided in the axial direction of the handle; the lock core includes a lock core fixing frame provided in the mounting hole, a lock core head installed in the lock core fixing frame, and a lock core connecting rod installed outside the lock core fixing frame and coaxially connected to the lock core head, the lock core connecting rod is passed through a fixing plate enclosed in the port of the lock core fixing frame and is coaxially connected to the top plate toggle block in an unlockable manner; the sliding rod toggle block is fixed on the side of the fixing plate facing away from the lock core head.

3. The operating mechanism of the key combination lock according to claim 1, characterized in that: The top plate toggle block is provided with a rotating groove for rotating cooperation with the rotating disk, and a first notch is provided on the periphery of the rotating groove; a first sliding groove is provided in the radial direction of the rotating disk, a sliding pin is slidably fitted in the first sliding groove, and a second notch is provided at one end of the first sliding groove, and the end head of the sliding pin is movably passed through the second notch and the first notch; a second cam is coaxially connected to the inner end of the lock core, and the second cam is transmission-connected to the sliding pin, for driving the sliding pin to telescopically cooperate at the first notch to realize the unlockable coaxial connection between the lock core and the top plate toggle block.

4. The operating mechanism of the key combination lock according to claim 3, characterized in that: It also includes a third spring arranged between the other end of the first sliding groove and the sliding pin, and the surface of the sliding pin is provided with a cam groove for rotationally engaging with the second cam.

5. The operating mechanism of the key combination lock according to claim 1, characterized in that: The top plate is provided with a second sliding groove for sliding engagement of the sliding rod, and the end of the sliding rod is provided with a rod head that slides into the second sliding groove, a step is formed between the rod head and the end face of the sliding rod, and the step abuts against the surface of the top plate.

6. The operating mechanism of the key combination lock according to claim 5, characterized in that: It also includes a limiting buckle arranged opposite to the sliding rod, and a fourth spring acting on the limiting buckle, under the action of the fourth spring, the lower plane of the limiting buckle abuts the surface of the sliding rod; when the top plate and the sliding rod simultaneously overcome the second spring and the first spring and move radially with the handle on their backs, the lower plane will slide out of the plane of the sliding rod surface and abut the step surface of the sliding rod, and the side plane of the buckle coincides with the side section of the step surface, so that the sliding rod cannot be reset and the top plate is reset normally in the unlocked state; an upper inclined surface and an end inclined surface are provided between the contact surface of the top plate and the limiting buckle, which are used to lift the limiting buckle when the top plate is reset so that the side plane is separated from the side section.

7. The operating mechanism of the key combination lock according to claim 1, characterized in that: The rotation process of the function knob is provided with a first angle, a second angle and a third angle, and the distance between the top plate and the circumference of the top plate toggle block is respectively limited by the first cam: when the function knob is at the first angle, the distance between the top plate and the top plate toggle block is the maximum value, and the locking plate and the sliding rod cannot move to the position of retrieving the password; when the function knob is at the second angle, the distance between the top plate 6 and the top plate toggle block along the handle is the middle value, the locking plate and the sliding rod can move to the position of retrieving the password, and the locking plate cannot move to the position of setting the password; when the function knob is at the third angle, the distance between the top plate and the top plate toggle block is the minimum value, and the locking plate can move to the position of setting the password.

8. The operating mechanism of the key combination lock according to claim 1, characterized in that: The circumferential surface of the top sheet toggle block is provided with a cam wall and a third notch; the top sheet is provided with a top sheet tongue portion arranged opposite to the circumferential surface of the top sheet toggle block, and the top sheet tongue portion abuts against the retaining wall and / or the circumferential surface of the top sheet toggle block under the drive of the locking sheet, and movably cooperates with the cam wall or the third notch as the top sheet toggle block rotates.

9. The operating mechanism of the key combination lock according to claim 8, characterized in that: A guide slope is provided at the connection between the third notch and the cam wall so that the tongue of the top sheet can enter and exit the third notch.

10. The operating mechanism of the key combination lock according to claim 8, characterized in that: Hanging walls are provided on both sides of the retaining wall at a height corresponding to the top sheet tongue, and the hanging walls do not contact the sliding rod; when the sliding rod toggle block passes over the top sheet tongue as the handle rotates, the top sheet tongue enters the third notch under the drive of the locking plate, and the side walls of the top sheet tongue limit the rotation and resetting of the sliding rod toggle block.

11. The operating mechanism of the key combination lock according to claim 1, characterized in that: It also includes an elastic member for driving the handle to reset.

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