Tumbler lock

Abstract

The application discloses a dial wheel coded lock, and belongs to the technical field of coded locks. The overall thickness of the lock is significantly reduced by changing the setting mode of the dial wheel. The dial wheel coded lock comprises a lock shell, a handle, a lock tongue and a coded component. The handle is rotationally connected with the lock shell and coaxially connected with the lock tongue. The coded component is arranged in the lock shell and comprises a plurality of disc-shaped and rotatable dial wheels for inputting a code. The coded component restricts the rotation of the handle when the code is incorrect and allows the rotation of the handle when the code is correct. The axis of the dial wheel is perpendicular to the panel of the lock shell, and the axial end face of the dial wheel is provided with a number as the code. The side edge of the dial wheel is exposed to the side face in the length direction of the lock shell and is used for being dialled by a user to input the code.

Description

Technical Field

[0001] This invention belongs to the field of combination lock technology, and specifically refers to a dial combination lock. Background Technology

[0002] Combination locks are widely used in all aspects of life due to their convenience (no need to carry keys), ease of use, and high security, especially in safes, filing cabinets, lockers, and luggage where theft or privacy protection is required. Among them, the digit lock, a common type of mechanical combination lock, typically consists of several rotating digit wheels. These wheels are engraved with numbers or letters, and users unlock the lock by rotating the wheels to align the preset combination numbers. This type of lock has a relatively simple structure and intuitive operation, and is widely used in lockers, lockers, bicycle locks, and other similar applications.

[0003] However, existing combination locks with digits generally suffer from significant thickness. Specifically, in traditional designs, the pivot of the digit wheel is typically parallel to the lock's faceplate, meaning the end face of the digit wheel (the side engraved with numbers) is perpendicular to the faceplate. In this layout, the overall thickness of the lock is directly limited by the radius of the digit wheel—the lock thickness must be at least greater than the radius of the digit wheel, usually falling between the radius and diameter, meaning it must be greater than the radius. This makes it difficult to achieve a thinner lock, limiting its use in installations with strict thickness requirements (such as thin cabinet doors or locks for bags in confined spaces). Therefore, effectively reducing the thickness of combination locks to make them suitable for a wider range of applications is a pressing issue in this field. Summary of the Invention

[0004] The main objective of this invention is to provide a dial combination lock that solves the problems existing in the prior art, aiming to significantly reduce the overall thickness of the lock by changing the way the dial is set.

[0005] To achieve the above objectives, the solution of the present invention is: A combination lock includes a lock housing, a handle, a bolt, and a combination assembly. The handle is rotatably connected to the lock housing and coaxially connected to the bolt. The combination assembly is disposed within the lock housing and includes several disc-shaped, rotatable dials for inputting a combination. The combination assembly restricts the rotation of the handle when the combination is incorrect and allows the handle to rotate when the combination is correct. The axis of each dial is perpendicular to the panel of the lock housing, and its axial end face is provided with numbers representing the combination. The side of each dial protrudes from the side of the lock housing along its length and is used by the user to turn it to input the combination.

[0006] After adopting the above technical solution, the present invention has the following technical effects: (1) The present invention sets the axis of the dial wheel perpendicular to the panel of the lock case, so that the axial end face of the dial wheel faces the panel, and the numbers are set on the axial end face for the user to observe. At the same time, the side of the dial wheel protrudes from the side of the lock case for the dialing operation. In this arrangement, the overall thickness of the lock is no longer limited by the radius of the dial wheel, but only depends on the axial thickness of the dial wheel (i.e., the thickness of the wheel disc), which is much smaller than the radius of the dial wheel.

[0007] (2) Compared with the traditional structure where the dial shaft is parallel to the panel and the thickness is limited by the radius of the dial, the present invention can significantly reduce the overall thickness of the lock, making the lock body thinner and more suitable for specific use scenarios where the cabinet space is small and the installation thickness is strictly required.

[0008] (2) The dials are arranged vertically and exposed on the side, which makes it convenient for users to directly dial them and also allows for clear reading of the numbers through the panel window. This achieves both a thin profile and intuitive and convenient operation.

[0009] In a preferred embodiment, the dial lock further includes a tail rod, which rotatably engages within the lock housing. The handle and bolt are coaxially connected to both ends of the tail rod, both via key connections. The combination lock assembly also includes a lock push plate and a first elastic element. The lock push plate slidably engages within the lock housing to restrict or allow rotation of the tail rod at one end. The first elastic element drives the lock push plate back to a position that restricts the rotation of the tail rod. The lock push plate is configured to restrict sliding when the combination is incorrect and allow sliding when the combination is correct. The tail rod enables coaxial linkage between the handle and bolt, and the sliding lock push plate and reset elastic element centrally control the combination of combination verification and lock opening / closing, resulting in a compact structure and efficient transmission.

[0010] Furthermore, one end of the locking push plate is provided with a locking protrusion, and the circumferential surface of the tail rod is provided with a locking groove. The locking protrusion is inserted into or disengaged from the locking groove as the locking push plate slides. The rotation is limited by the engagement of the locking protrusion and the locking groove, ensuring a firm and reliable lock. The push plate also disengages smoothly during sliding, ensuring that each unlocking action is precise and accurate.

[0011] Furthermore, the combination lock assembly also includes a bushing paired with the dial wheel, the bushing being kinetically connected to the corresponding dial wheel; the bushing is rotatably fitted on a rotating shaft provided on the surface of the lock push plate, and its circumferential surface is provided with an unlocking groove; the lock housing has a first stop block that moves through a first clearance hole provided on the lock push plate; the first stop block abuts against the circumferential surface of the bushing to restrict the sliding of the lock push plate; the unlocking groove is opposite to the first stop block when the combination lock is correct, so as to allow the sliding of the lock push plate. By using the first stop block on the lock housing and the unlocking groove on the circumferential surface of the bushing for alignment and engagement, the correctness of the combination lock is determined physically. The first stop block can only slide when it falls exactly into the unlocking groove, which is logically intuitive and has reliable limiting.

[0012] Furthermore, a bushing gear and a dial gear are respectively provided between the opposing ends of the bushing and the dial wheel; the locking push plate is configured such that: when the tail rod rotates, the bushing gear and the dial gear are restricted from meshing; and when the tail rod rotates, the bushing gear and the dial gear are allowed to disengage. During unlocking, the locking push plate drives the bushing to slide, causing the bushing gear and the dial gear to disengage, at which point the dial wheel can rotate freely to set a new password; after resetting, the two gears re-mesh and resume transmission. This design cleverly utilizes the unlocking stroke to achieve code-changing state switching, eliminating the need for additional complex operations and making code changing convenient and efficient.

[0013] Furthermore, the dial combination lock also includes a lock cylinder, which is located inside the tail rod; the combination assembly also includes a code-finding push plate, and several pairs of code-finding pins corresponding to the number of bushings and a second elastic element; the code-finding push plate is kinetically connected to the lock cylinder and slides on the locking push plate under the drive of the lock cylinder; the bushing has a code-finding slot on its circumferential surface, the code-finding pin slides in the groove of the code-finding push plate, and abuts against the circumferential surface of the bushing under the action of the second elastic element; the code-finding slot is opposite to the code-finding pin when the combination is correct, and the code-finding pin is inserted into the code-finding slot under the action of the second elastic element to lock the rotation of the bushing. The lock cylinder and bolt of this invention work in conjunction with the key-driven code-finding push plate. A flexible pin automatically engages with the code-finding slot when the bushing rotates to the correct password position, precisely locking each bushing in the correct location. This helps users quickly retrieve all lost passwords, significantly improving the product's fault tolerance and ease of use. Furthermore, compared to traditional "emergency unlocking," the lock cylinder and bolt of this invention are not linked. Normal key insertion or forced insertion of a foreign object into the lock cylinder, which triggers the code-finding push plate, only applies to password retrieval, not direct unlocking. This avoids forced unlocking, and only those familiar with the lock's functions (usually administrators) can use it correctly.

[0014] Furthermore, the code-finding push plate has a hollow portion that matches the bushing to avoid interfering with the sliding of the bushing along with the locking push plate; the lock housing has a second stop block that moves through the second clearance hole provided on the code-finding push plate; the code assembly also includes a third elastic element, which is provided in the second clearance hole, with its two ends abutting against the end walls of the second stop block and the second clearance hole respectively, for driving the code-finding push plate to reset to the position where the code-finding pin is disengaged from the code-finding slot; the locking push plate has a third clearance hole opposite to the second clearance hole. The hollow portion ensures that the bushing will not mechanically interfere with the code-finding push plate when the locking push plate slides, ensuring smooth operation; the third elastic element can drive the code-finding push plate to automatically reset after code finding is completed, so that all components return to their orderly positions.

[0015] Furthermore, the dial combination lock also includes a code-finding push rod and a fourth elastic element. The code-finding push rod extends and retracts radially within the tail rod to abut the end of the code-finding push plate. The code-finding push rod has a recessed groove, and the end of the lock cylinder has an eccentric shaft that can be driven by a key. The eccentric shaft is movably fitted within the recessed groove, so that the key rotation drives the code-finding push rod to extend out of the circumference of the tail rod and push the code-finding push plate. The fourth elastic element is located between the code-finding push rod and the tail rod, and is used to drive the code-finding push rod back into the tail rod. By engaging the recessed groove of the eccentric shaft at the end of the lock cylinder with the code-finding push rod, the rotational motion of the key is precisely converted into the radial linear extension motion of the push rod, resulting in a compact structure, high force transmission efficiency, and minimal internal space occupation.

[0016] Furthermore, the dial lock also includes a lock cylinder cover that magnetically engages with the outer end of the lock cylinder; the combination component also includes a steel ball and a fifth elastic element for restricting the rotation of the dial, and the circumferential surface of the dial has a stop groove for the steel ball to be inserted into, so that the dial has a "stop feel" when it is turned. The magnetic lock cylinder cover can effectively prevent dust and improve the overall aesthetics, and it is also easy for users to quickly remove it by hand to retrieve the combination, thus balancing protection and convenience; the steel ball and the stop groove cooperate to produce a clear tactile feedback when turned, effectively improving the user's dial operation experience and preventing the dial from being accidentally turned.

[0017] In a preferred embodiment, the lock case includes a panel and a lock body; the combination lock assembly is installed in the lock body, and the dial is rotatably connected to the panel. The panel has a through hole for the side of the dial to pass through, and a window for displaying the combination lock. The window on the panel allows the user to directly read the combination lock numbers on the dial end face, and the through hole allows the side of the dial to pass through to activate the dial. The overall layout is reasonable, and disassembly and maintenance are convenient.

[0018] Furthermore, the lock housing also includes a baffle, a first cover plate, and a second cover plate; the baffle cooperates with the panel to restrict the axial movement of the dial wheel; the first cover plate is mounted on the key-finding push plate to prevent the key-finding pin from disengaging from the key-finding push plate; the second cover plate is mounted on the locking push plate to prevent the bushing from disengaging from the locking push plate. This improves the assembly stability and long-term reliability of the moving parts.

[0019] In a preferred embodiment, the dials are divided into two groups and respectively located on both sides of the lock body, and are staggered left and right along the length of the lock body to achieve a reasonable distribution of the dial positions and a simple and harmonious appearance. Attached Figure Description

[0020] Figure 1 This is a front view of a specific embodiment of the present invention, wherein AA indicates Figure 8 , Figure 11 , Figure 13 , Figure 17 The sectional view direction.

[0021] Figure 2 This is an exploded view of a specific embodiment of the present invention.

[0022] Figure 3 This is a perspective view of the dial and bushing according to a specific embodiment of the present invention.

[0023] Figure 4 This is a perspective view of the locking push plate and the first elastic element according to a specific embodiment of the present invention.

[0024] Figure 5 This is a perspective view of the code-finding pusher plate according to a specific embodiment of the present invention.

[0025] Figure 6 This is a perspective view of the code-finding push rod and the fourth elastic element according to a specific embodiment of the present invention.

[0026] Figure 7 This is a perspective view of the lock cylinder according to a specific embodiment of the present invention.

[0027] Figure 8 Cross-sectional view of the locked state according to a specific embodiment of the present invention. Figure 1 BB and CC respectively represent Figure 9 , Figure 10 The sectional view direction.

[0028] Figure 9 Cross-sectional view of the locked state according to a specific embodiment of the present invention. Figure 2 .

[0029] Figure 10 Cross-sectional view of the locked state according to a specific embodiment of the present invention. Figure 3 .

[0030] Figure 11 A cross-sectional view of the state before unlocking after entering the correct password, according to a specific embodiment of the present invention. Figure 1 DD indicates Figure 12 The sectional view direction.

[0031] Figure 12 A cross-sectional view of the state before unlocking after entering the correct password, according to a specific embodiment of the present invention. Figure 1 .

[0032] Figure 13 A profile of the state before password finding according to a specific embodiment of the present invention. Figure 1 EE represents Figures 14 to 16 The sectional view direction.

[0033] Figure 14 A cross-section of the password search start state in a specific embodiment of the present invention. Figure 2 .

[0034] Figure 15 This is a cross-sectional view of the password-finding process in a specific embodiment of the present invention.

[0035] Figure 16 This is a cross-sectional view of the password search completion state in a specific embodiment of the present invention.

[0036] Figure 17 A cross-section of the password replacement process according to a specific embodiment of the present invention. Figure 1 FF represents Figure 17 The sectional view direction.

[0037] Figure 18 A cross-section of the password replacement process according to a specific embodiment of the present invention. Figure 2 .

[0038] Explanation of icon numbers: 100-Lock case; 101-Panel; 1011-Through hole; 1012-Window; 102-Lock body; 1021-First stop; 1022-Second stop; 103-Baffle; 104-First cover plate; 105-Second cover plate; 200-handle; 300-Lock tongue; 400 - Password assembly; 401 - Dial wheel; 4011 - Dial wheel gear; 4012 - Position slot; 402 - Locking push plate; 4021 - Locking protrusion; 4022 - Rotating shaft; 4023 - First clearance hole; 403 - First elastic element; 404 - Bushing; 4041 - Unlocking slot; 4042 - Bushing gear; 4043 - Code finding slot; 405 - Code finding push plate; 4051 - Slide groove; 4052 - Hollowed-out part; 4053 - Second clearance hole; 406 - Code finding pin; 407 - Second elastic element; 408 - Third elastic element; 409 - Steel ball; 410 - Fifth elastic element; 500 - Tail rod; 501 - Locking groove; 600 - Lock cylinder; 601 - Eccentric shaft; 700 - Tracking push rod; 701 - Slot; 800 - Fourth elastic element; 900-Lock cylinder cover. Detailed Implementation

[0039] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0040] refer to Figures 1 to 18 As shown, the present invention provides a dial combination lock, including a lock case 100, a handle 200, a bolt 300, and a combination component 400. The lock case 100 includes a panel 101 and a lock body 102, and the combination component 400 is installed inside the lock body 102. The handle 200 is rotatably connected to the lock case 100 and coaxially connected to the bolt 300; the combination component 400 is disposed inside the lock case 100 and includes a plurality of disc-shaped, rotatable dials 401 for inputting a combination; the combination component 400 restricts the rotation of the handle 200 when the combination is incorrect and allows the handle 200 to rotate when the combination is correct.

[0041] join Figure 2 The aforementioned dial combination lock also includes a tail rod 500, which is rotatably fitted within the lock housing 100. A handle 200 and a bolt 300 are coaxially connected to both ends of the tail rod 500 via key connections to achieve synchronous rotation of all three; that is, rotating the handle 200 can simultaneously rotate the tail rod 500 and the bolt 300. The aforementioned combination assembly 400 also includes a lock push plate 402 and a first elastic element 403. The lock push plate 402 is slidably fitted within the lock housing 100 to restrict or allow rotation of the tail rod 500 at one end. The first elastic element 403 drives the lock push plate 402 back to the position that restricts the rotation of the tail rod 500. The lock push plate 402 is configured to restrict sliding when the combination is incorrect and allow sliding when the combination is correct.

[0042] See Figure 4 , Figure 9The locking push plate 402 has a locking protrusion 4021 at one end, and the tail rod 500 has a locking groove 501 on its circumferential surface. The locking protrusion 4021 is inserted into or removed from the locking groove 501 as the locking push plate 402 slides.

[0043] The axis of the aforementioned dial 401 is perpendicular to the panel 101 of the lock housing 100, see [reference]. Figure 3 The axial end face of the dial 401 is provided with numbers serving as a password; see also Figure 1 The side of the dial 401 protrudes along the length of the lock housing 100 and is used by the user to turn it to enter a password. See also Figure 2 The panel 101 has a through hole 1011 for the side of the dial 401 to pass through, and a window 1012 for displaying the password.

[0044] The aforementioned combination lock assembly 400 also includes a bushing 404 paired with a dial wheel 401, the bushing 404 being kinetically connected to the corresponding dial wheel 401. The bushing 404 is rotatably fitted onto a locking push plate 402, and its circumferential surface is provided with an unlocking groove 4041; the lock body 102 of the lock housing 100 is provided with a first stop 1021 that moves through the locking push plate 402; the first stop 1021 abuts against the circumferential surface of the bushing 404 to restrict the sliding of the locking push plate 402; the unlocking groove 4041 is opposite to the first stop 1021 when the combination is correct, so as to allow the sliding of the locking push plate 402.

[0045] See Figure 3 The bushing 404 and the dial wheel 401 are respectively provided with bushing gear 4042 and dial wheel gear 4011 between their opposing ends. The locking push plate 402 is configured such that when the tail rod 500 rotates, the bushing gear 4042 and the dial wheel gear 4011 are engaged, and when the tail rod 500 rotates, the locking push plate 402 allows the bushing gear 4042 and the dial wheel gear 4011 to disengage.

[0046] See Figure 2 , Figure 7 The aforementioned dial combination lock also includes a lock cylinder 600, which is located within the tail rod 500. The combination assembly 400 further includes a code-finding push plate 405, and a number of code-finding pins 406 corresponding to the number of bushings 404, and a second elastic element 407. The code-finding push plate 405 is tractively connected to the lock cylinder 600 and slides on the locking push plate 402 under the drive of the lock cylinder 600. The bushing 404 has a code-finding slot 4043 on its circumferential surface. The code-finding pins 406 slide in the code-finding push plate 405 and abut against the circumferential surface of the bushing 404 under the action of the second elastic element 407. When the combination is correct, the code-finding slot 4043 is opposite to the code-finding pins 406. Under the action of the second elastic element 407, the code-finding pins 406 are inserted into the code-finding slot 4043 to lock the rotation of the bushing 404.

[0047] See Figure 5The aforementioned code-finding push plate 405 is provided with a hollow portion 4052 that matches the bushing 404 to avoid interfering with the sliding of the bushing 404 along with the locking push plate 402; the lock body 102 of the lock case 100 is provided with a second stop 1022 that moves through the code-finding push plate 405; the password assembly 400 also includes a third elastic member 408, the two ends of the third elastic member 408 respectively abut against the second stop 1022 and the code-finding push plate 405, for driving the code-finding push plate 405 to reset to the position where the code-finding pin 406 is disengaged from the code-finding slot 4043.

[0048] See Figure 2 , Figure 6 The aforementioned dial combination lock also includes a code-finding push rod 700 and a fourth elastic element 800. The code-finding push rod 700 is radially telescopically fitted within the tail rod 500 to abut the end of the code-finding push plate 405. The code-finding push rod 700 is provided with a groove 701, and the end of the lock cylinder 600 is provided with an eccentric shaft 601 that can be driven by a key. The eccentric shaft 601 is movably fitted within the groove 701 so that the key rotation drives the code-finding push rod 700 to extend out of the circumference of the tail rod 500 and push the code-finding push plate 405. The fourth elastic element 800 is located between the code-finding push rod 700 and the tail rod 500 and is used to drive the code-finding push rod 700 back into the tail rod 500.

[0049] See Figure 1 , Figure 2 The aforementioned dial combination lock also includes a lock cylinder cover 900 that is magnetically attached to the outer end of the lock cylinder 600.

[0050] The aforementioned password component 400 also includes a steel ball 409 for restricting the rotation of the dial 401 and a fifth elastic element 410. The circumferential surface of the dial 401 is provided with a stop groove 4012 for the steel ball 409 to be inserted into, so that the dial 401 has a stop feel when it is turned.

[0051] See Figure 2 , Figure 8 The lock housing 100 further includes a baffle 103, a first cover plate 104, and a second cover plate 105; the baffle 103 cooperates with the panel 101 to restrict the axial movement of the dial wheel 401; the first cover plate 104 is mounted on the code-finding push plate 405 to prevent the code-finding pin 406 from disengaging from the code-finding push plate 405; the second cover plate 105 is mounted on the locking push plate 402 to prevent the bushing 404 from disengaging from the locking push plate 402.

[0052] See Figure 1 The aforementioned dial 401 is divided into two groups and is respectively located on both sides of the lock body 102, and is arranged alternately on the left and right sides along the length of the lock body 102.

[0053] The specific working process of the present invention will be described in detail below with reference to the accompanying drawings.

[0054] I. Locked State like Figures 8 to 10 As shown, in the locked state, the first elastic element 403 drives the locking push plate 402 to its initial position. The locking protrusion 4021 at the end of the locking push plate 402 is embedded in the locking groove 501 on the circumferential surface of the tail rod 500, and the tail rod 500 is locked and cannot rotate. At this time, the bushing 404 is in the initial position along with the locking push plate 402. The bushing gear 4042 and the dial gear 4011 are engaged. Each dial 401 can drive the corresponding bushing 404 to rotate through gear transmission. The first stop 1021 abuts against the circumferential surface of each bushing 404. Since the unlocking groove 4041 of the bushing 404 is not aligned with the first stop 1021 when the password is incorrect, the bushing 404 and the locking push plate 402 are restricted by the first stop 1021 and cannot slide, thereby achieving locking.

[0055] II. Unlocking Process like Figure 11 and Figure 12 As shown, the user moves each dial 401 to the correct password number. The dial 401, through the meshing of the dial gear 4011 and the bushing gear 4042, drives the corresponding bushing 404 to rotate. When all bushings 404 are rotated to the correct position, the unlocking groove 4041 on the circumference of each bushing 404 is exactly opposite to the first stop 1021 inside the lock body 102 of the lock case 100. At this time, the user turns the handle 200, which drives the tail rod 500 to rotate. The rotation of the tail rod 500 causes the locking push plate 402 to slide, the locking protrusion 4021 to disengage from the locking groove 501, and the first stop 1021 to slide into the unlocking groove 4041. The locking push plate 402 and the bushing 404 slide as a whole. As the locking push plate 402 slides, the bushing gear 4042 disengages from the dial gear 4011, and the tail rod 500 can rotate freely and drive the bolt 300 to move, thus unlocking the lock.

[0056] If any dial 401 is not turned to the correct number, the unlocking groove 4041 of the corresponding bushing 404 is not aligned with the first stop 1021. The first stop 1021 still abuts against the circumferential surface of the bushing 404, the locking push plate 402 is restricted from sliding, the locking protrusion 4021 remains embedded in the locking groove 501, and the tail rod 500 cannot rotate, thereby realizing the locking function when the password is wrong.

[0057] III. Password Change Process like Figure 17 and Figure 18As shown, in the unlocked state, i.e., after the locking push plate 402 slides and the bushing gear 4042 disengages from the dial gear 4011, the user moves each dial 401 to the preset new password number. Since the bushing gear 4042 is disengaged from the dial gear 4011 at this time, the rotation of the dial 401 will not drive the bushing 404 to rotate, so the bushing 404 remains in the position corresponding to the correct password. After the dial 401 is reset, the user turns the handle 200 back to the locked position. The locking push plate 402 resets under the action of the first elastic element 403, and the bushing gear 4042 re-engages with the dial gear 4011, and the password is successfully changed.

[0058] IV. Password Retrieval Process like Figures 13 to 16 As shown, the user first uses a magnet to hold the lock cylinder cover 900 and remove it, then inserts the management key into the lock cylinder 600 and turns it. When the lock cylinder 600 rotates, its eccentric shaft 601 moves within the groove 701, causing the code-finding push rod 700 to extend radially along the tail rod 500. The code-finding push rod 700 pushes the code-finding push plate 405 to slide. When the code-finding push plate 405 slides, its code-finding pin 406 abuts against the circumferential surface of each bushing 404 under the action of the second elastic element 407. At this time, the user sequentially moves each dial 401, and the dial 401 drives the corresponding bushing 404 to rotate through gear transmission. When a bushing 404 rotates to the correct password position, the password-finding slot 4043 on the circumference of the bushing 404 is exactly opposite to the password-finding pin 406. Under the action of the second elastic element 407, the password-finding pin 406 inserts into the password-finding slot 4043, locking the bushing 404 and preventing it from rotating further. The corresponding dial 401 also stops rotating, indicating that the password has been found. Each dial 401 is turned sequentially until the password-finding pins 406 of all bushings 404 are inserted into their corresponding password-finding slots 4043, thus completing the retrieval of all passwords. After the password is retrieved, the management key is turned in reverse. The lock cylinder 600 drives the password-finding push rod 700 to retract into the tail rod 500 under the action of the fourth elastic element 800. The password-finding push plate 405 resets under the action of the third elastic element 408, and the password-finding pin 406 disengages from the password-finding slot 4043, restoring all components to their initial state.

[0059] During the above process, the steel ball 409 cooperates with the stop groove 4012 on the circumference of the dial 401 to provide a clear tactile feedback when the user moves the dial 401, making it easy for the user to operate accurately.

[0060] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A dial combination lock, characterized in that: Includes a lock case (100), a handle (200), a bolt (300), and a combination lock assembly (400); The handle (200) is rotatably connected to the lock housing (100) and coaxially connected to the bolt (300); The password component (400) is located inside the lock housing (100) and includes several disc-shaped, rotatable dials (401) for inputting a password; the password component restricts the rotation of the handle (200) when the password is incorrect and allows the handle (200) to rotate when the password is correct; The axis of the dial (401) is perpendicular to the panel (101) of the lock case (100), and its axial end face is provided with numbers as passwords; the side of the dial (401) is exposed on the side of the lock case (100) in the length direction, and is used by the user to turn it to input the password.

2. The dial combination lock according to claim 1, characterized in that: It also includes a tail rod (500), which is rotatably fitted inside the lock housing (100), and the handle (200) and the latch (300) are coaxially connected to both ends of the tail rod (500); The password assembly (400) further includes a locking push plate (402) and a first elastic member (403); the locking push plate (402) is slidably fitted within the lock housing (100) to restrict or allow the rotation of the tail rod (500) at one end; the first elastic member (403) is used to drive the locking push plate (402) back to the position that restricts the rotation of the tail rod (500); The locking push plate (402) is set to restrict sliding when the password is incorrect and allow sliding when the password is correct.

3. The dial combination lock according to claim 2, characterized in that: One end of the locking push plate (402) is provided with a locking protrusion (4021), and the circumferential surface of the tail rod (500) is provided with a locking groove (501). The locking protrusion (4021) is inserted into or disengaged from the locking groove (501) as the locking push plate (402) slides.

4. The dial combination lock according to claim 2, characterized in that: The password component (400) also includes a bushing (404) paired with the dial (401), the bushing (404) being kinetically connected to the corresponding dial (401); The bushing (404) is rotatably fitted on the locking push plate (402), and its circumferential surface is provided with an unlocking groove (4041); the lock housing (100) is provided with a first stop (1021) that moves through the locking push plate (402); The first stop (1021) abuts against the circumferential surface of the bushing (404) to restrict the sliding of the locking push plate (402); the unlocking groove (4041) is opposite to the first stop (1021) when the password is correct to allow the sliding of the locking push plate (402).

5. The dial combination lock according to claim 4, characterized in that: A bushing gear (4042) and a dial gear (4011) are respectively provided between the opposing ends of the bushing (404) and the dial wheel (401); The locking push plate (402) is configured such that: the locking push plate (402) restricts the bushing gear (4042) from meshing with the dial gear (4011) when the tail rod (500) rotates, and the locking push plate (402) allows the bushing gear (4042) to disengage from the dial gear (4011) when the tail rod (500) rotates.

6. The dial combination lock according to claim 4, characterized in that: It also includes a lock cylinder (600), which is disposed inside the tail rod (500); The cryptographic component (400) further includes a code-finding push plate (405), and a plurality of pairs of code-finding pins (406) corresponding to the number of bushings (404) and a second elastic element (407); The code-finding push plate (405) is connected to the lock cylinder (600) and slides on the lock stop plate (402) under the drive of the lock cylinder (600); The bushing (404) has a code-finding slot (4043) on its circumferential surface. The code-finding pin (406) is slidably engaged in the code-finding push plate (405) and abuts against the circumferential surface of the bushing (404) under the action of the second elastic member (407). When the code is correct, the code-finding slot (4043) is opposite to the code-finding pin (406). Under the action of the second elastic member (407), the code-finding pin (406) is inserted into the code-finding slot (4043) to lock the rotation of the bushing (404).

7. The dial combination lock according to claim 6, characterized in that: The code-finding push plate (405) is provided with a hollow portion (4052) that matches the bushing (404) to avoid interfering with the sliding of the bushing (404) along with the locking push plate (402); The lock housing (100) is provided with a second stop (1022) that moves through the code-finding push plate (405); The cryptographic component (400) further includes a third elastic element (408), the two ends of which abut against the second stop (1022) and the code-finding push plate (405) respectively, for driving the code-finding push plate (405) to reset to the position where the code-finding pin (406) is disengaged from the code-finding slot (4043).

8. The dial combination lock according to claim 6, characterized in that: It also includes a code-finding push rod (700), which is telescopically fitted inside the tail rod (500) to abut the end of the code-finding push plate (405); The code-finding push rod (700) is provided with a groove (701), and the end of the lock cylinder (600) is provided with an eccentric shaft (601) that can be driven by a key. The eccentric shaft (601) is movably fitted in the groove (701) so that the key rotation drives the code-finding push rod (700) to extend out of the circumference of the tail rod (500) and push the code-finding push plate (405).

9. The dial combination lock according to claim 6, characterized in that: It also includes a lock cylinder cover (900) that is magnetically attached to the outer end of the lock cylinder (600) by a magnet; The password component (400) also includes a steel ball (409) for activating and restricting the rotation of the dial (401) and a fifth elastic element (410), wherein the circumferential surface of the dial (401) is provided with a stop groove (4012) for the steel ball (409) to be activatingly inserted.

10. The dial combination lock according to claim 1, characterized in that: The lock case (100) includes a panel (101) and a lock body (102); the password assembly (400) is installed inside the lock body (102), and the dial (401) is rotatably connected to the panel (101). The panel (101) is provided with a through hole (1011) for the side of the dial (401) to pass through, and a window (1012) for displaying the password.

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