Password door lock

Abstract

The utility model discloses a password door lock which comprises a shell, a lock pin, a first reset piece and a password wheel mechanism, the lock pin, the first reset piece and the password wheel mechanism are arranged on the shell, the rear side of the shell is concavely provided with a containing concave cavity for an ear plate on a door to extend into, the side face of the shell is provided with a through hole for an insertion rod to be inserted into the containing concave cavity, and the lock pin is movably connected with the shell. The code wheel mechanism is provided with a push rod, a second reset piece and a plurality of code wheel assemblies, the code wheel assemblies are rotationally connected with the shell, and the push rod is arranged in the code wheel assemblies in a penetrating mode; the second reset piece enables the end, away from the lock pin, of the push rod to have the tendency of extending out of the shell in the axial direction of the push rod all the time, during locking, the code wheel assembly limits axial movement of the push rod, and during unlocking, the push rod axially abuts against the lock pin to move relative to the code wheel assembly so as to remove clamping between the lock pin and the insertion rod. The use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a combination lock. Background Technology

[0002] Padlocks are a common type of lock. Existing padlocks usually consist of two parts: the lock body and the U-shaped hook. When in use, the U-shaped hook is usually hooked onto the two lugs on the door and the door frame (or the two lugs between two doors). Since the U-shaped hook and lugs are exposed and easily pried open, a type of door lock with a recessed cavity has appeared on the market. This cavity can hide the lugs and prevent them from being pried open. However, this type of door lock uses a key to unlock and requires carrying a key, which is inconvenient. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a combination lock that uses a combination of passwords for unlocking, making it more convenient to use.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A combination lock includes a housing, a locking pin and a first reset member disposed on the housing. The rear side of the housing is recessed to accommodate an ear plate on the door. The side of the housing is provided with a through hole for inserting a rod into the accommodating cavity. The locking pin is movably connected to the housing. The first reset member has a tendency to keep the locking pin and the rod in a locked state.

[0006] The housing is provided with a combination wheel mechanism, which includes a push rod, a second reset member, and multiple combination wheel assemblies. The combination wheel assemblies are rotatably connected to the housing. The push rod passes through the multiple combination wheel assemblies. The second reset member ensures that the end of the push rod away from the locking pin always tends to extend out of the housing along the axial direction of the push rod. When locking, the combination wheel assembly restricts the axial movement of the push rod. When unlocking, the push rod pushes against the locking pin axially relative to the combination wheel assembly to release the locking pin from the engagement of the insertion rod.

[0007] By adding a combination wheel mechanism to the housing, the combination wheel mechanism consists of a push rod, a second reset member, and multiple combination wheel assemblies. The combination wheel assemblies are rotatably connected to the housing, and the push rod passes through the multiple combination wheel assemblies. The second reset member ensures that the end of the push rod away from the locking pin always tends to extend out of the housing along the axial direction of the push rod. When locking, the combination wheel assembly restricts the axial movement of the push rod, preventing the push rod from pushing the locking pin. When unlocking, after adjusting the combination wheel assembly to the correct position, pressing the push rod causes it to push the locking pin axially, thus removing the lock pin from the locking rod and unlocking the door. This allows for unlocking using a combination method, making it more convenient to use.

[0008] In one embodiment, the housing is provided with a first mounting groove and a second mounting groove that are connected to each other. The first mounting groove is located on one side of the accommodating cavity and communicates with a through hole. The second mounting groove is located below the accommodating cavity. The locking pin and the first reset member are both located in the first mounting groove, and the password wheel assembly is located in the second mounting groove.

[0009] In one embodiment, both the first mounting slot and the second mounting slot are open to the rear to form mounting openings, and the rear side of the housing is provided with a rear cover that covers the mounting openings, and the rear cover is detachably connected to the housing.

[0010] In one embodiment, the first mounting groove has a first recess and a second recess that are connected to each other, the locking pin has a movable plate and a snap-fit ​​part provided at the upper end of the movable plate, the circumferential outer wall of the insertion rod is provided with a slot for the snap-fit ​​part to extend into, and the movable plate and the snap-fit ​​part are movably disposed in the first recess.

[0011] In one embodiment, a rounded corner is formed between the movable plate and the snap-fit ​​portion.

[0012] In one embodiment, the first mounting groove has a third recess, the movable plate is provided with a hook, the hook can move up and down in the third recess, and the housing is provided with a limiting block corresponding to the hook, the cooperation between the limiting block and the hook can restrict the downward movement of the locking pin.

[0013] In one embodiment, the third recess is connected between the first recess and the second recess, and the limiting block is disposed between the through hole and the second recess.

[0014] In one embodiment, the hook is bent from the upper end of the movable plate, and the hook and the movable plate are arranged in an L-shape.

[0015] In one embodiment, the axis of the push rod is parallel or perpendicular to the axis of the insertion rod.

[0016] In one embodiment, the housing is provided with a first mounting groove, a second mounting groove, and a third mounting groove. The first mounting groove is located on one side of the receiving cavity, the second mounting groove is located below the first mounting groove and the two are connected, and the third mounting groove is located below the receiving cavity. An alarm device is provided in the third mounting groove.

[0017] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, by adding a combination wheel mechanism to the housing, the combination wheel mechanism consists of a push rod, a second reset member, and multiple combination wheel assemblies. The combination wheel assemblies are rotatably connected to the housing, and the push rod passes through the multiple combination wheel assemblies. The second reset member ensures that the end of the push rod away from the locking pin always tends to extend out of the housing along the axial direction of the push rod. When locking, the combination wheel assembly restricts the axial movement of the push rod, preventing the push rod from pushing the locking pin. When unlocking, after adjusting the combination wheel assembly to the correct position, pressing the push rod causes it to push the locking pin axially, thus removing the lock pin from the engagement with the insertion rod and unlocking the door. Therefore, the combination wheel mechanism makes the lock more convenient to use.

[0018] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of the first embodiment of the present utility model;

[0020] Figure 2 This is a second-view structural schematic diagram of the first embodiment of the present utility model;

[0021] Figure 3 This is an exploded view of the first embodiment of the present invention;

[0022] Figure 4 This is an assembly diagram of the first reset component, insertion rod, locking pin, and combination wheel mechanism according to the first embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the locking pin structure of the first embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the first embodiment of this utility model with the back cover removed.

[0025] Figure 7 yes Figure 6 A cross-sectional schematic diagram;

[0026] Figure 8 This is a first-view structural schematic diagram of the second embodiment of the present utility model;

[0027] Figure 9 This is a second-view structural schematic diagram of the second embodiment of the present utility model;

[0028] Figure 10 This is a schematic diagram of the second embodiment of this utility model with the back cover removed.

[0029] Figure 11yes Figure 10 A cross-sectional schematic diagram.

[0030] Explanation of reference numerals in the attached diagram:

[0031] 10-Housing shell, 101-Accommodating cavity, 102-Through hole, 103-First mounting groove, 1031-First recess, 1032-Second recess, 1033-Third recess, 104-Second mounting groove, 105-Allowing hole, 106-Groove, 107-Third mounting groove, 108-Sound hole, 11-Locking pin, 111-Modible plate, 112-Snap-fit ​​part, 113-Rounded corner, 114-Hook part, 12 - First reset component, 13- Rear cover, 131- Notch, 14- Limiting block, 15- Third reset component, 151- Push block, 152- Third pressure spring, 20- Insert rod, 21- Slot, 30- Password wheel mechanism, 31- Push rod, 311- Pushing slope, 312- Baffle, 32- Second reset component, 33- Password wheel assembly, 331- Inner ring, 332- Outer ring, 333- Number, 40- Alarm device. Detailed Implementation

[0032] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figure 1-7As shown, this utility model discloses a combination lock. In a first embodiment, the combination lock includes a housing 10, a locking pin 11 and a first reset member 12 disposed on the housing 10. The rear side of the housing 10 is recessed with a receiving cavity 101 for the ear plate on the door to extend into. The side of the housing 10 is provided with a through hole 102 for the insertion rod 20 to be inserted into the receiving cavity 101. The locking pin 11 is movably connected to the housing 10. The first reset member 12 has the tendency to keep the locking pin 11 and the insertion rod 20 in a locked state. When locked, the ear plate is placed in the receiving cavity 101 so that the housing 10 covers the ear plate.

[0035] The housing 10 is provided with a combination wheel mechanism 30, which has a push rod 31, a second reset member 32, and multiple combination wheel assemblies 33. The combination wheel assemblies 33 are rotatably connected to the housing 10. The push rod 31 passes through the multiple combination wheel assemblies 33. The second reset member 32 causes the end of the push rod 31 away from the locking pin 11 to always tend to extend out of the housing 10 along the axial direction of the push rod 31. The axis of the push rod 31 is perpendicular to the axis of the insertion rod 20. When locking, the combination wheel assembly 33 restricts the axial movement of the push rod 31. When unlocking, the push rod 31 pushes the locking pin 11 axially relative to the combination wheel assembly 33 to release the locking pin 11 from the insertion rod 20.

[0036] The housing 10 has a first mounting groove 103 and a second mounting groove 104 that are connected to each other. The first mounting groove 103 is located on one side of the receiving cavity 101 and is connected to the through hole 102. The second mounting groove 104 is located below the receiving cavity 101. The locking pin 11 and the first reset member 12 are both located in the first mounting groove 103, and the password wheel assembly 33 is located in the second mounting groove 104.

[0037] Both the first mounting groove 103 and the second mounting groove 104 are open to the rear to form mounting openings. The rear side of the housing 10 is provided with a rear cover 13 to cover the mounting openings. The rear cover 13 is detachably connected to the housing 10. The rear cover 13 is provided with a notch 131 for accommodating the recessed cavity 101. By providing mounting openings, it is convenient for the locking pin 11 and the first reset member 12 to be inserted into or removed from the first mounting groove 103 through the mounting openings. Assembly and disassembly are convenient. The rear cover 13 serves to cover and protect the internal components of the housing 10.

[0038] The first mounting groove 103 has a first recess 1031 and a second recess 1032 that are connected. The locking pin 11 has a movable plate 111 and a snap-fit ​​part 112 located at the upper end of the movable plate 111. The circumferential outer wall of the insertion rod 20 is provided with a snap groove 21 for the snap-fit ​​part 112 to extend into. The snap groove 21 is an annular groove. The movable plate 111 and the snap-fit ​​part 112 are movably disposed in the first recess 1031. The first reset member 12 is located in the second recess 1032. The first reset member 12 is a first pressure spring. The upper end of the first pressure spring abuts against the inner top wall of the third recess 1033, and the lower end of the first pressure spring abuts against the locking pin 11.

[0039] A rounded corner 113 is formed between the movable plate 111 and the locking part 112; by setting the rounded corner 113, the connection strength between the movable plate 111 and the locking part 112 is increased, deformation or even breakage is prevented, and the reliability and anti-theft performance of the locking pin 11 are improved.

[0040] The first mounting groove 103 has a third recess 1033. The movable plate 111 is provided with a hook 114. The hook 114 can move up and down in the third recess 1033. The housing 10 is provided with a limiting block 14 corresponding to the hook 114. The cooperation between the limiting block 14 and the hook 114 can limit the downward movement of the locking pin 11. By setting the limiting block 14, after the insertion rod 20 is taken out, the limiting block 14 is used to limit the locking pin 1111, so as to prevent the snap-fit ​​part 112 from extending too deeply into the through hole 102, and to facilitate the insertion rod 20 to be reinserted into the through hole 102.

[0041] Specifically, the hook 114 is located at the upper end of the movable plate 111, the third recess 1033 is connected between the first recess 1031 and the second recess 1032, and the limiting block 14 is located between the through hole 102 and the second recess 1032.

[0042] The hook 114 is bent from the upper end of the movable plate 111, and the hook 114 and the movable plate 111 form an L-shape. The movable plate 111, the snap-fit ​​part 112, and the hook 114 are integrally formed. The hook 114 is formed by bending, which makes it simple to manufacture and low in cost.

[0043] The push rod 31 has a pushing slope 311 at one end near the locking pin 11, and the pushing slope 311 extends inclinedly from top to bottom towards the locking pin 11.

[0044] The combination wheel assembly 33 has several corresponding inner rings 331 and outer rings 332. The inner ring 331 is fitted inside the outer ring 332. The outer ring 332 has numbers 333 on its circumferential outer wall. The outer ring 332 can drive the inner ring 331 to rotate. The push rod 31 can be axially moved through the inner ring 331. The push rod 31, inner ring 331 and outer ring 332 are coaxially arranged. The front side of the housing 10 has several clearance holes 105 for the numbers 333 on the outer ring 332 to be exposed. For example, the number of inner rings 331 and outer rings 332 can be four or more. When all inner rings 331 are rotated to the correct angle, the push rod 31 can move axially, thereby enabling the push rod 31 to push the locking pin 11 to move and achieve unlocking. When at least one inner ring 331 is not rotated to the correct angle, the push rod 31 is engaged with the inner ring 331, and the inner ring 331 restricts the axial movement of the push rod 31 to achieve locking.

[0045] The second reset member 32 is a second pressure spring. One end of the second pressure spring abuts against the housing 10 or the code wheel assembly 33, and the other end of the second pressure spring abuts against the push rod 31. Specifically, the push rod 31 is provided with a baffle 312, and the other end of the second pressure spring abuts against the baffle 312.

[0046] The inner wall of the receiving cavity 101 away from the through hole 102 is provided with a groove 106 facing the through hole 102. The groove 106 is provided with a third reset member 15 that causes the insertion rod 20 to pop outward away from the receiving cavity 101. By setting the third reset member 15, when unlocking, the insertion rod 20 is pushed outward away from the receiving cavity 101 by the third reset member 15, which makes the unlocking speed fast and convenient.

[0047] The third reset member 15 has a push block 151 and a third pressure spring 152. The push block 151 can move along the axial direction of the insertion rod 20, and the third pressure spring 152 makes the push block 151 always tend to move towards the through hole 102.

[0048] It should be noted that the first pressure spring, the second pressure spring, and the third pressure spring can all be replaced by tension springs.

[0049] like Figure 8-11As shown, in the second embodiment, the difference from the first embodiment is that the axis of the push rod 31 is parallel to the axis of the insertion rod 20, the second mounting groove 104 is located below the first mounting groove 103 and the two are connected, a third mounting groove 107 is provided below the receiving cavity 101, an alarm device 40 is provided in the third mounting groove 107, a sound hole 108 communicating with the third mounting groove 107 is provided at the bottom of the housing 10, the third mounting groove 107 is connected to the second mounting groove 104, and the third mounting groove 107 also has a rearward opening for installation. By setting the alarm device 40, an alarm will be automatically sounded when the combination lock is vibrated or damaged, thereby improving the anti-theft performance.

[0050] In summary, this utility model adds a combination wheel mechanism 30 to the housing 10. The combination wheel mechanism 30 consists of a push rod 31, a second reset member 32, and multiple combination wheel assemblies 33. The combination wheel assemblies 33 are rotatably connected to the housing 10. The push rod 31 passes through the multiple combination wheel assemblies 33. The second reset member 32 ensures that the end of the push rod 31 away from the locking pin 11 always tends to extend out of the housing 10 along the axial direction of the push rod 31. When locking, the combination wheel assemblies 33 restrict the axial movement of the push rod 31, preventing the push rod 31 from pushing the locking pin 11. When unlocking, after adjusting the combination wheel assembly 33 to the correct position, pressing the push rod 31 causes the push rod 31 to push the locking pin 11 axially, thus removing the jamming between the locking pin 11 and the insertion rod 20 and unlocking the device. Therefore, the device uses a combination method for unlocking, making it more convenient to use.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the actual technical aspects of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A cipher lock for a door, characterized in that The shell is provided with a lock pin, a first reset member, a password wheel mechanism, a first installation slot, a second installation slot and a third installation slot, and the shell is provided with a receiving cavity on the rear side, and the shell is provided with a through hole on the side surface. The password wheel mechanism comprises a push rod, a second reset member and a plurality of password wheel assemblies, the password wheel assemblies are rotationally connected to the shell, the push rod is arranged in the plurality of password wheel assemblies, the second reset member has a tendency to make the end of the push rod away from the lock pin to extend out of the shell along the axial direction of the push rod, when locking, the password wheel assemblies limit the axial movement of the push rod, and when unlocking, the push rod pushes the lock pin axially relative to the password wheel assemblies to release the clamping of the lock pin and the plug.

2. The cipher lock as claimed in claim 1, wherein, The first installation slot is arranged on one side of the receiving cavity and is in communication with the through hole, and the second installation slot is arranged below the receiving cavity.

3. The cipher lock as claimed in claim 2, wherein, The first installation slot and the second installation slot are both open to the rear and form an installation opening, the rear side of the shell is provided with a rear cover for shielding the installation opening, and the rear cover is detachably connected to the shell.

4. The cipher lock according to claim 2, wherein The first installation slot has a first recess and a second recess in communication, the lock pin has a movable plate and a clamping portion arranged on the upper end of the movable plate, the circumferential outer wall of the plug is provided with a clamping groove for the clamping portion to extend into, and the movable plate and the clamping portion are movably arranged in the first recess.

5. The cipher lock according to claim 4, wherein, The movable plate and the clamping portion are formed with a rounded corner.

6. The cipher lock as claimed in claim 4, wherein, The first installation slot has a third recess, the movable plate is provided with a hook portion, the hook portion is movably arranged in the third recess, the shell is provided with a limiting block corresponding to the hook portion, and the cooperation between the limiting block and the hook portion can limit the downward movement of the lock pin.

7. The cipher lock according to claim 6, wherein The third recess is in communication between the first recess and the second recess, and the limiting block is arranged between the through hole and the second recess.

8. The cipher lock according to claim 6, wherein, The hook portion is bent and formed from the upper end of the movable plate, and the hook portion and the movable plate form an L-shaped arrangement.

9. The cipher lock according to claim 1, wherein, The axis of the push rod is parallel or perpendicular to the axis of the plug.

10. The cipher lock according to claim 1, wherein, The shell is provided with a first installation slot, a second installation slot and a third installation slot, the first installation slot is arranged on one side of the receiving cavity, the second installation slot is arranged below the first installation slot and is in communication with the first installation slot, and the third installation slot is arranged below the receiving cavity and is provided with an alarm device.

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