Coded lock

Abstract

A coded lock comprises a shell, a code assembly, a button, an output shaft and a spring bolt are installed on the shell, the code assembly is provided with code wheels, the button is used for stirring the code wheels to rotate, the spring bolt is installed at the output end of the output shaft and synchronously rotates with the output shaft, the output shaft is at least provided with a first rotating position, a second rotating position and a third rotating position, and correspondingly, the first rotating position, the second rotating position and the third rotating position correspond to each other. The output shaft can drive the spring bolt to have three different rotating positions, the output shaft rotates to the first rotating position so that the coded lock can be in a locked state, the output shaft rotates to the second rotating position so that the coded lock can be in an unlocked state, and the output shaft rotates to the third rotating position so that the coded lock can be in a password setting state. According to the coded lock, the coded lock can be switched among the locking state, the unlocking state and the password setting state by rotating the output shaft, the password wheels rotating to the non-zero position can be reset through the password manual reset mechanism, the safety of the coded lock is improved, and operation is very easy.

Description

Technical Field

[0001] The utility model relates to the technical field of locks, in particular to a password lock. Background Art

[0002] There are various types of locks available in the prior art. Combination locks are widely used due to their ease of use and novel design. Combination locks typically use a series of numbers or symbols to unlock. Common combination locks can be categorized as mechanical locks, digital locks, and so on. Mechanical combination locks generally involve rotating a set of numbered combination wheels, which directly activate the internal mechanism to unlock and lock the lock. For example, the "Mechanical Combination Lock" disclosed in the Chinese Utility Model Patent No. CN201320308335.0 (Authorization Announcement No. CN 203441211 U) comprises a front shell and a bottom shell, wherein the front shell and the bottom shell form a receiving space, in which a cover plate, a wheel shaft, a clutch block, a pressing block, a movable block, a lock hook, an opening and closing lock mechanism for controlling the opening and closing of the lock hook, and a lock block for driving the opening and closing lock mechanism are installed. A code adjustment block, a code adjustment wheel, and a reset spring are sequentially sleeved on the outer side of the wheel shaft along the axis. The wheel shaft is provided with a push plate, and the two ends of the reset spring respectively abut the code wheel and the push plate. The push plate and the movable block respectively abut the clutch block on the same side. The outer end face of the code adjustment wheel is sleeved with a code wheel, and a slot is provided on the inner side of the code adjustment wheel. The code adjustment wheel is provided with a second protrusion that can be inserted into the slot. Although the mechanical combination lock is relatively small in size and the code change operation is relatively convenient and quick, the code cannot be manually reset, and its use safety is insufficient. In summary, the existing password lock structure needs to be further improved. Utility Model Content

[0003] The first technical problem to be solved by the present invention is to provide a combination lock which can switch between a locked state, an unlocked state and a password setting state by rotating an output shaft in response to the above-mentioned existing technical status.

[0004] The second technical problem to be solved by the present invention is to provide a password lock with a manual clearing and resetting function in response to the above-mentioned existing technical status.

[0005] The utility model discloses a technical scheme that solves the first technical problem is as follows: a combination lock, comprising a shell, a password assembly, a button, an output shaft and a lock tongue are installed on the shell, the password assembly has a password wheel, the button is used to move the password wheel rotation, the lock tongue is installed in the output end of output shaft and rotates synchronously with output shaft, characterized in that: the output shaft has at least first rotation position, second rotation position and third rotation position, and the output shaft rotates to first rotation position and makes combination lock be in the locking state, and the output shaft rotates to second rotation position and makes combination lock be in the unlocking state, and the output shaft rotates to third rotation position and makes combination lock be in the password setting state.

[0006] The utility model discloses a technical scheme that solves the second technical problem is as follows: still install password manual zero reset mechanism on the shell, and the password manual zero reset mechanism can drive the password wheel rotating to non-zero position to carry out zero reset.

[0007] The password manual zero reset mechanism can have multiple structures, preferably, the password manual zero reset mechanism includes an operating handle and a transmission assembly, the outer end of the operating handle is exposed outside the shell, the inner end of the operating handle is arranged inside the shell, the transmission assembly is installed at the inner end of the operating handle, and the operating handle drives the password wheel to reset to zero through the transmission assembly. By operating the operating handle, the password wheel can be reset to zero, and the operation is very convenient.

[0008] Further preferably, the password assembly includes an axle, a shaft sleeve, a password wheel, a one-way bushing and a reset spring, the shaft sleeve, the password wheel, the one-way bushing and the reset spring are all sleeved on the axle, a clutch structure is arranged between the password wheel and the shaft sleeve, the reset spring is arranged between the password wheel and the shaft sleeve, and the shaft sleeve always has a tendency to move outward to separate the clutch structure, in the separated state of the clutch structure, the password wheel can rotate relative to the shaft sleeve, the output end of the transmission assembly is installed on the axle and can drive the axle to rotate synchronously, and the one-way bushing is fixed on the axle and can drive the password wheel to reset to zero after rotation. By the clutch structure, the password wheel and the shaft sleeve can be engaged or separated, and the one-way bushing can drive the password wheel to reset to zero.

[0009] Further preferably, the end of the one-way bushing has a radially outward convex outer convex part, the inner circumferential wall of the password wheel is convexly provided with a stop block, and the outer convex part acts on the stop block to drive the password wheel to reset to zero.

[0010] The transmission assembly can have multiple structures, preferably, the transmission assembly includes a first bevel gear and a second bevel gear that are engaged with each other, the first bevel gear is installed on the operating handle and rotates under the drive of the operating handle, and the second bevel gear is installed on the axle and drives the axle to rotate synchronously.

[0011] In order to enable the output shaft to smoothly drive the toggle piece to move axially during rotation, a toggle piece is also installed in the shell. The outer circumferential surface of the output shaft has a large arc surface with a larger radius, a small arc surface with a smaller radius, and a groove connected between the large arc surface and the small arc surface and further deepened inward from the small arc surface. In the locked state, the end of the toggle piece is against the small arc surface. In the unlocked state, the end of the toggle piece is against the large arc surface. In the password setting state, the end of the toggle piece extends into the groove.

[0012] There are various types of clutch structures. Preferably, the clutch structure includes a rib protruding from the outer circumferential wall of the sleeve and a slot formed on the inner circumferential wall of the code wheel. The rib is arranged along the circumference of the sleeve, and the slot is arranged along the circumference of the code wheel. The toggle piece can drive the sleeve to move toward the interior of the code wheel, causing the rib to engage with the corresponding slot. The reset spring can drive the sleeve to move toward the exterior of the code wheel, causing the rib to disengage from the corresponding slot. When the rib is engaged with the slot, the sleeve and the code wheel rotate synchronously. When the rib is disengaged from the slot, the code wheel can rotate relative to the sleeve. In this arrangement, the rib and the slot can cooperate to cause the sleeve and the code wheel to rotate synchronously or to cause the code wheel to rotate relative to the sleeve. When the rib is disengaged from the slot, the code wheel can rotate relative to the sleeve, at which time the password can be set or the code wheel can be reset after the password is set. When the rib is engaged with the slot, the code wheel and the sleeve can only rotate simultaneously, at which time the password can be entered.

[0013] Further preferably, the sleeve is formed with a sleeve body, a first bead, and a second bead in sequence from the inside out along the axial direction. The outer diameter of the second bead is larger than that of the first bead. The ribs are circumferentially spaced on the outer circumferential wall of the first bead. A notch is formed circumferentially on the second bead. The toggle plate has a protrusion that cooperates with the notch. The protrusion can be inserted into the notch when aligned with the corresponding notch under the drive of the output shaft. With this arrangement, after the correct password is entered in the locked state, the sleeve and the password wheel rotate synchronously until the notch and the protrusion are aligned. The toggle lever, driven by the output shaft, can insert the protrusion into the corresponding notch to unlock the door.

[0014] In order to limit the rotation of the output shaft, a limit block is protruding from the outer peripheral wall of the output shaft, and a first limit wall and a second limit wall are formed inside the shell. In the locked state, the output shaft rotates to the position where the limit block abuts against the first limit wall. In the password setting state, the output shaft rotates to the position where the limit block abuts against the second limit wall.

[0015] To facilitate assembly, the shell includes a base and a lower cover that can be detachably mounted on the base. One end of the output shaft extends from the base to form a rotating part, and the other end of the output shaft extends from the lower cover. The lock tongue is arranged outside the lower cover and is mounted on the output shaft.

[0016] Compared with the prior art, the advantages of the present invention are: the combination lock can be locked by rotating the output shaft to the first rotation position, can be unlocked by rotating it to the second rotation position, and can be set to the combination lock state by rotating it to the third rotation position. The combination lock is very convenient to switch between the above three states. Moreover, the combination lock can also reset the combination wheel rotated to a non-zero position through the manual password reset mechanism, which not only helps to improve the security of the combination lock but also is very simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the password lock of an embodiment of the present utility model (locked state);

[0018] Figure 2 for Figure 1 The schematic diagram of the structure of the combination lock with the lower cover removed;

[0019] Figure 3 for Figure 1 An exploded schematic diagram of the combination lock shown;

[0020] Figure 4 for Figure 1 A cross-sectional view of the structure of the password lock shown;

[0021] Figure 5 This is a schematic structural diagram of the output shaft of an embodiment of the utility model;

[0022] Figure 6 A partially exploded schematic diagram of a cryptographic component according to an embodiment of the present invention;

[0023] Figure 7 A partial schematic diagram of a cryptographic component according to an embodiment of the present invention;

[0024] Figure 8 This is a schematic structural diagram of a shaft sleeve according to an embodiment of the present utility model;

[0025] Figure 9 This is a schematic diagram of the structure of the cipher wheel according to an embodiment of the present utility model;

[0026] Figure 10 This is a schematic diagram of the structure of a combination lock according to an embodiment of the present invention (unlocked state);

[0027] Figure 11 for Figure 10 The schematic diagram of the structure of the combination lock shown (removing the lower cover and lock tongue);

[0028] Figure 12 Structure diagram of the password lock (unlocked state) of the embodiment of the present application;

[0029] Figure 13 For Figure 12 Structure diagram of the password lock (remove the lower cover and the lock tongue) shown. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] As Figures 1 to 5 shown, the password lock 1 of the embodiment includes a shell 1, and the shell 1 is installed with components such as a password assembly 2, a button 3, an output shaft 4, a lock tongue 5, a manual zero clearing mechanism 6 and a toggle piece 7. Among them, the shell 1 includes a base 11 and a lower cover 12 which is detachably installed on the base 11, one end of the output shaft 4 extends out of the base 11 to form a rotating part 45, the other end of the output shaft 4 extends out of the lower cover 12, and the lock tongue 5 is arranged outside the lower cover 12 and is installed on the output shaft 4.

[0032] By rotating the rotating part 45, the output shaft 4 has a first rotation position, a second rotation position and a third rotation position, and correspondingly, the lock tongue 5 can be synchronously rotated to three different positions. The output shaft 4 is rotated to the first rotation position to make the password lock in a locked state, at this time, the position of the lock tongue 5 is recorded as 0°; the output shaft 4 is rotated to the second rotation position to make the password lock in an unlocked state, at this time, the position of the lock tongue 5 is recorded as 90°; the output shaft 4 is rotated to the third rotation position to make the password lock in a password setting state, at this time, the position of the lock tongue 5 is recorded as 180°. When setting the password, the button 3 rotates the password wheel 23 of the password assembly 2, that is, the password can be input or set. Taking the vertical installation of the password lock as an example, the 0° position and the 180° position are horizontal positions and the directions are opposite, and the 90° position is a vertical position.

[0033] The outer circumferential surface of the output shaft 4 has a large radius arc surface 41, a small radius arc surface 42 and a groove 43 which is connected between the large radius arc surface 41 and the small radius arc surface 42 and further inwards from the small radius arc surface 42. The toggle piece 7 is also installed in the base 11. In the locked state, the end of the toggle piece 7 abuts against the small radius arc surface 42, in the unlocked state, the end of the toggle piece 7 abuts against the large radius arc surface 41, and in the password setting state, the end of the toggle piece 7 extends into the groove 43.

[0034] As Figures 6 to 9As shown, the password assembly 2 of this embodiment includes an axle 21, a sleeve 22, a password wheel 23, a one-way bushing 24 and a reset spring 25. The sleeve 22, the password wheel 23, the one-way bushing 24 and the reset spring 25 are all sleeved on the axle 21. A clutch structure is provided between the password wheel 23 and the sleeve 22. The reset spring 25 is disposed between the password wheel 23 and the sleeve 22, and ensures that the sleeve 22 always maintains a tendency to move outward to separate the clutch structure.

[0035] The sleeve 22 of this embodiment is formed, axially from the inside out, with a sleeve body 220, a first bead 221, and a second bead 222. The outer diameter of the second bead 222 is larger than that of the first bead 221. Circumferentially spaced ribs 223 are formed on the outer circumference of the first bead 221, and circumferentially spaced grooves 232 are formed on the inner circumference of the code wheel 23. The ribs 223 and grooves 232 form a clutch mechanism. During operation, the paddle 7 drives the sleeve 22 toward the interior of the code wheel 23, causing the ribs 223 to engage with the corresponding grooves 232. At this point, the clutch mechanism is engaged, and the sleeve 22 and code wheel 23 rotate synchronously. The return spring 25 drives the sleeve 22 toward the exterior of the code wheel 23, disengaging the ribs 223 from the corresponding grooves 232. At this point, the clutch mechanism is disengaged, allowing the code wheel 23 to rotate relative to the sleeve 22 to set the code.

[0036] In addition, the second flange 222 of the sleeve 22 is circumferentially defined with notches 224, with each sleeve 22 having one notch 224. The paddle 7 has a protrusion 71 that mates with the corresponding notch. When the clutch mechanism is engaged, the sleeve 22 and the combination wheel 23 rotate synchronously, resulting in the position of the notches 224 also moving circumferentially. However, the paddle 7 can only move axially and cannot rotate circumferentially. Therefore, when the sleeve 22 rotates until the notches 224 are aligned with the protrusion 71, the paddle 7, driven by the output shaft 4, can move inward relative to the sleeve 22 and thereby be inserted into the notch 224.

[0037] The manual reset mechanism of this embodiment is mounted on the base 11. The manual reset mechanism 6 includes an operating handle 61 and a transmission assembly. The outer end of the operating handle 61 is exposed outside the base 11, and the inner end of the operating handle 61 is located inside the base 11. The transmission assembly is mounted on the inner end of the operating handle 61. The operating handle 61 drives the password wheel 23 to reset to zero through the transmission assembly. The transmission assembly includes a first bevel gear 62 and a second bevel gear 63 that mesh with each other. The first bevel gear 62 is mounted on the operating handle 61 and rotates when driven by the operating handle 61. The second bevel gear 63 is mounted on the axle 21 and drives the axle 21 to rotate synchronously. The specific transmission structure and principle of the transmission assembly are conventional designs and will not be described in detail here.

[0038] A one-way bushing 24 is fixed to the axle 21 and rotates synchronously with the axle 21. The end of the one-way bushing 24 has a radially outwardly projecting protrusion 241. A stopper 231 is protruding from the inner circumference of the code wheel 23. The protrusion 241 acts on the stopper 231 to drive the rotating code wheel 23 to reset.

[0039] In addition, a stopper 44 is protruding from the outer wall of the output shaft 4 of this embodiment, and a first stopper wall 111 and a second stopper wall 112 are formed within the base 11. In the locked state, the output shaft 4 rotates until the stopper 44 abuts against the first stopper wall 121, positioning the lock tongue 5 in the 0° position. In the password setting state, the output shaft 4 rotates until the stopper 44 abuts against the second stopper wall 112, positioning the lock tongue 5 in the 180° position.

[0040] The working principle of this combination lock is as follows:

[0041] like Figures 1 to 9 As shown, the combination lock is in the locked state, with the lock tongue 5 at the 0° position, the toggle plate 7 abutting against the small arc surface 42, and the sleeve 22 and the combination wheel 23 engaged. To unlock, the button 3 is pressed. Each time the button 3 is pressed, the sleeve 22 and the combination wheel 23 rotate synchronously by one wheel number. When the correct combination is entered, the notches 224 of the four sleeves 22 are all aligned in a straight line and aligned with the corresponding protrusions 71 of the toggle plate 7. At this point, the output shaft 4 can rotate smoothly to unlock the lock.

[0042] like Figure 10 and Figure 11 As shown, the combination lock is in the unlocked state, the lock tongue 5 is at the 90° position, the toggle piece 7 is against the large arc surface 41, and driven by the toggle rod 7, the entire sleeve 22 is pushed inward into the interior of the combination wheel 23, and the sleeve 22 and the combination wheel 23 are still in the engaged state.

[0043] like Figure 12 and Figure 13As shown, the lock is in the password setting state, the bolt 5 is in the 180° position, the push piece 7 is inserted into the groove 43, under the action of the reset spring 25, the shaft sleeve 22 moves outward relative to the password wheel 23 to the maximum distance, so that the convex rib 223 of the shaft sleeve 22 is separated from the clamping groove 232 of the password wheel 23, that is, the clutch structure is in the separated state, at this time, the four notches 224 of the shaft sleeve 22 are also located on the same straight line, and the convex block 71 is still arranged in the corresponding notch 224, when the user presses the button 3, the password wheel 23 rotates, and the shaft sleeve 22 does not rotate. After setting the password, the output shaft 4 is reversely rotated, that is, the output shaft 4 is reversely rotated from the current 180° position to the 0° initial position, during the reverse rotation, the push piece 7 will abut against the small circular arc surface 42, the shaft sleeve 22 is moved inward relative to the password wheel 23, the convex rib 223 is clamped into the clamping groove 232, the shaft sleeve 22 and the password wheel 23 rotate synchronously, finally, the bolt 5 returns to the 0° position, that is, returns to the locking state. At this time, the operation handle 61 of the manual zero clearing mechanism 6 is pressed, the operation handle 61 drives the wheel shaft 21 and the one-way bush 24 to rotate synchronously through the bevel gear transmission assembly, the outer convex part 241 of the one-way bush 24 acts on the stop block 231 and can drive the password wheel 23 after rotation to clear and reset. With the manual password zero clearing or zero clearing, the notch 224 of the shaft sleeve 22 rotates synchronously to the convex block 71 corresponding to the push rod 7, and after the next correct password is input, the lock is opened.

[0044] In the description and claims of the present application, terms are used to generally refer to the structure of the application as well as the action devices, and such terms are used only to convey a particular meaning to those who are skilled in the art, and are used only for the convenience of description, and are determined based on the example orientation shown in the drawings. Since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating the direction should only be used as a description and should not be considered as a limitation, such as "up", "down", which are not necessarily limited to the direction opposite or consistent with the direction of gravity.

Claims

1. A combination lock, comprising a housing (1), a combination assembly (2), a button (3), an output shaft (4) and a lock tongue (5) mounted on the housing (1), wherein the combination assembly (2) has a combination wheel (23), the button (3) is used to turn the combination wheel (23) to rotate, and the lock tongue (5) is mounted on the output end of the output shaft (4) and rotates synchronously with the output shaft (4), characterized in that: The output shaft (4) has at least a first rotation position, a second rotation position and a third rotation position. When the output shaft (4) is rotated to the first rotation position, the password lock is in a locked state. When the output shaft (4) is rotated to the second rotation position, the password lock is in an unlocked state. When the output shaft (4) is rotated to the third rotation position, the password lock is in a password setting state.

2. The combination lock according to claim 1, characterized in that: A manual password clearing mechanism (6) is also installed on the housing (1), and the manual password clearing mechanism (6) can drive the password wheel (23) to rotate to a non-zero position for clearing and resetting.

3. The combination lock according to claim 2, characterized in that: The manual password clearing mechanism (6) comprises an operating handle (61) and a transmission assembly, wherein the outer end of the operating handle (61) is exposed outside the housing (1), and the inner end of the operating handle (61) is arranged inside the housing (1). The transmission assembly is installed at the inner end of the operating handle (61), and the operating handle (61) drives the password wheel (23) to clear and reset through the transmission assembly.

4. The combination lock according to claim 3, characterized in that: The password assembly (2) comprises a wheel shaft (21), a shaft sleeve (22), a password wheel (23), a one-way bushing (24) and a reset spring (25). The shaft sleeve (22), the password wheel (23), the one-way bushing (24) and the reset spring (25) are all sleeved on the wheel shaft (21). A clutch structure is provided between the password wheel (23) and the shaft sleeve (22). The reset spring (25) is arranged between the password wheel (23) and the shaft sleeve (22) and enables the shaft sleeve (22) to always maintain a tendency to move outward to separate the clutch structure. When the clutch structure is separated, the password wheel (23) can rotate relative to the shaft sleeve (22). The output end of the transmission assembly is mounted on the wheel shaft (21) and can drive the wheel shaft (21) to rotate synchronously. The one-way bushing (24) is fixed on the wheel shaft (21) and can drive the rotated password wheel (23) to reset.

5. The combination lock according to claim 4, characterized in that: The end of the one-way bushing (24) has a radially outwardly protruding outer portion (241), and the inner peripheral wall of the code wheel (23) is convexly provided with a stopper (231). The outer portion (241) acts on the stopper (231) to drive the code wheel (23) to reset.

6. The combination lock according to claim 4, characterized in that: The transmission assembly includes a first bevel gear (62) and a second bevel gear (63) that mesh with each other. The first bevel gear (62) is mounted on the operating handle (61) and rotates under the drive of the operating handle (61). The second bevel gear (63) is mounted on the wheel shaft (21) and drives the wheel shaft (21) to rotate synchronously.

7. The combination lock according to claim 4, characterized in that: A toggle piece (7) is also installed in the housing (1). The outer peripheral surface of the output shaft (4) has a large arc surface (41) with a larger radius, a small arc surface (42) with a smaller radius, and a groove (43) connected between the large arc surface (41) and the small arc surface (42) and further inwardly extending from the small arc surface (42). In a locked state, the end of the toggle piece (7) abuts against the small arc surface (42). In an unlocked state, the end of the toggle piece (7) abuts against the large arc surface (41). In a password setting state, the end of the toggle piece (7) extends into the groove (43).

8. The combination lock according to claim 7, characterized in that: The clutch structure comprises a convex rib (223) convexly arranged on the outer peripheral wall of the shaft sleeve (22) and a clamping groove (232) formed on the inner peripheral wall of the password wheel (23), wherein the convex rib (223) is arranged along the circumference of the shaft sleeve (22), and the clamping groove (232) is arranged along the circumference of the password wheel (23), and the paddle (7) can drive the shaft sleeve (22) to move toward the inside of the password wheel (23) so that the convex rib (223) is clamped into the corresponding clamping groove (232). ), the reset spring (25) can drive the sleeve (22) to move toward the outside of the code wheel (23) so that the rib (223) is disengaged from the corresponding slot (232); when the rib (223) is engaged in the slot (232), the sleeve (22) and the code wheel (23) rotate synchronously; when the rib (223) is disengaged from the slot (232), the code wheel (23) can rotate relative to the sleeve (22).

9. The combination lock according to claim 8, characterized in that: The shaft sleeve (22) is formed with a shaft sleeve body (220), a first convex ring (221) and a second convex ring (222) in sequence from the inside to the outside along the axial direction. The outer diameter of the second convex ring (222) is larger than the outer diameter of the first convex ring (221). The ribs (223) are circumferentially spaced and distributed on the outer peripheral wall of the first convex ring (221). A notch (224) is opened in the circumferential direction of the second convex ring (222). The shifting piece (7) has a convex block (71) that matches the notch (224). The convex block (71) can be inserted into the notch (224) under the drive of the output shaft (4) when it is aligned with the corresponding notch (224).

10. The combination lock according to claim 1, characterized in that: The housing (1) comprises a base (11) and a lower cover (12) detachably mounted on the base (11); one end of the output shaft (4) extends from the base (11) to form a rotating portion (45); the other end of the output shaft (4) extends from the lower cover (12); and the locking tongue (5) is arranged outside the lower cover (12) and mounted on the output shaft (4).

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