Combination padlock
By setting fixing holes on the outside of the lock cylinder head and fixing it with screws, the problems of the lock body base falling off and the lock arm getting stuck are solved, ensuring that the combination wheel rotates normally and improving the reliability of the combination lock.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UNITECH LOCK IND
- Filing Date
- 2024-11-07
- Publication Date
- 2026-08-04
AI Technical Summary
Existing combination locks have non-rigid locking beams in the lock cylinder that are prone to lateral movement, causing the combination wheels to fail to rotate and the lock body base to easily fall off.
By setting a fixing hole on the outside of the lock cylinder head and fixing it with screws, the movement of the lock arm on the outside of the lock cylinder hole is restricted, the friction between the fixing ring and the rotating wheel is increased, and the lock body base is prevented from falling off and the lock arm from getting stuck.
It effectively prevents the lock body base from falling off and the lock arm from getting stuck, ensuring that the combination wheel can rotate normally and improving the reliability of the combination lock.
Smart Images
Figure CN224591945U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a combination padlock. Background Technology
[0002] Locks are common items in daily life used to lock appliances such as doors, windows, and bicycles. There are many types of locks, and combination locks, which do not require keys and are convenient to use, are widely favored by consumers. A combination lock consists of components such as the lock body, shank, and cylinder. When the cylinder is in the center, the two lock body bases on either side need to cooperate with it. One base engages with the cylinder to fix and lock one end of the shank, while the other base is secured to the cylinder with a snap-fit. If the shank is not locked, the base can easily fall off. When the shank is fixed, it passes through the base and is fixed inside the cylinder hole. Because the cylinder hole is generally circular, some non-rigid shanks can still move left and right within the cylinder hole when locked. When the shank is stuck in the cylinder hole in an abnormal position, it pushes the pins inward, causing a series of components to be pushed inward as well. This reduces the gap between the combination wheels, increases friction, and can result in the combination wheels not turning, making the lock unable to open. Utility Model Content
[0003] This utility model provides a combination padlock.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0005] A combination padlock includes a first base and a second base. The first base has a first opening at its upper end and a first groove on its inner side. The second base has a second opening at its upper end and a second groove on its inner side. A lock cylinder is connected between the first groove of the first base and the second groove of the second base. The lock cylinder includes a lock cylinder head and a body. A lock beam is provided at the first and second openings. The lock beam includes a first lock arm and a second lock arm. The lower end of the second lock arm has an inwardly curved groove. A locking hole is provided above the lock cylinder head, opposite to the second opening, and a fixing hole is provided on its outer side. A through hole is provided on the outer side of the second base, opposite to the fixing hole. A screw passes through the through hole and is fixed to the fixing hole. A hollow part is provided in the middle of the body, which communicates with the second opening of the lock cylinder head. A pin is provided at the communication point. Several upwardly protruding locking teeth are provided in the hollow part. One end of the pin abuts against the locking teeth, and the other end protrudes into the second opening. The pin cooperates with the curved groove.
[0006] Preferably, a first protrusion is provided at the bottom of the first groove, and a third groove is provided at the bottom of the end of the body to cooperate with the first protrusion. The first protrusion and the third groove cooperate to fix the lock cylinder on the first base.
[0007] Preferably, the first locking arm is disposed within the first opening, the inner side of the first locking arm is provided with a first cut surface, the bottom is provided with a step opposite to the first cut surface, and a second protrusion is provided on the inner wall of the upper end of the first opening near the lock cylinder.
[0008] Preferably, the outer side of the main body is fitted with alternating fixed rings and rotating wheels, both of which are annular with the same outer diameter; the fixed ring is provided with a fourth groove that engages with the locking teeth, and the fixed ring is fitted on the outer side of the locking teeth, with the inner shape matching the shape of the main body; the rotating wheel is located on the same side of each fixed ring, and the rotating wheel is provided with a fifth groove, which has the same shape as the fourth groove and can both engage with the locking teeth; the inner circle of the rotating wheel is circular.
[0009] Preferably, the fixing ring is provided with an elastic locking protrusion, and the rotating wheel is provided with an arc-shaped third protrusion; a code wheel is sleeved on the outer side of the fixing ring and the rotating wheel, and a sixth groove is provided on the inner side of the number on the outer side of the code wheel to cooperate with the elastic locking protrusion and the third protrusion. The sixth groove of each code wheel corresponds to a pair of elastic locking protrusions and third protrusions.
[0010] Preferably, the outer sidewall of the locking hole is provided with a second tangent parallel to the horizontal plane.
[0011] Compared with the prior art, this utility model of a combination padlock provides a fixing hole on the outside of the lock cylinder head and a through hole on the outside of the second base. A screw is used to fix the second base to the fixing hole on the lock cylinder head via the through hole, thus preventing the second base from falling off when not in use. Furthermore, by providing a second slit on the outside of the lock cylinder hole, the movement space of the second locking arm is restricted after locking, preventing it from getting stuck when moving left or right after locking. Slightly pushing the pin inward increases the friction between the fixing ring and the rotating wheel, thus preventing the combination wheel from rotating. Attached Figure Description
[0012] Figure 1 This is a three-dimensional schematic diagram of the combination padlock of this utility model.
[0013] Figure 2 This is a cross-sectional view of the combination padlock of this utility model.
[0014] Figure 3 This is an exploded view of the combination padlock of this utility model.
[0015] Figure 4 This is a partial exploded view of the combination padlock of this utility model. Detailed Implementation
[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0017] like Figures 1 to 4 As shown, the combination padlock includes a first base 1 and a second base 2. The upper end of the first base 1 is provided with a first opening 11 and the inner side is provided with a first groove. The upper end of the second base 2 is provided with a second opening 21 and the inner side is provided with a second groove. A lock cylinder 4 is connected between the first groove of the first base 1 and the second groove of the second base 2. The lock cylinder 4 includes a lock cylinder head 41 and a body 42. The bottom of the first groove is provided with a first protrusion 12, and the bottom of the end of the body 42 is provided with a third groove 421 that cooperates with the first protrusion 12. The first protrusion 12 and the third groove 421 cooperate to fix the lock cylinder 4 on the first base 1.
[0018] Locking beams 3 are provided at the first opening 11 and the second opening 21. The locking beams 3 include a first locking arm 31 and a second locking arm 32. The first locking arm 31 is located inside the first opening 11. The inner side of the first locking arm 31 is provided with a first cut surface 311, and the bottom is provided with a step 312 opposite to the first cut surface 311. A second protrusion 13 is provided on the inner wall of the upper end of the first opening 11 near the lock cylinder 4. The second protrusion 13 cooperates with the step 312 to prevent the first locking arm 31 from completely leaving the first opening 11. The lower end of the second locking arm 32 is provided with an inward arc-shaped groove 321.
[0019] The lock cylinder head 41 has a locking hole 411 on its upper side that is opposite to the second opening 21, and a fixing hole 412 on its outer side; the second base 2 has a through hole on its outer side that is opposite to the fixing hole 412, and the screw 5 passes through the through hole and is fixed on the fixing hole 412, thereby fixing the second base 2 and the lock cylinder head 4 together.
[0020] The main body 42 has a hollow section in the middle, which communicates with the second opening 21 of the lock cylinder head 41. A pin 6 is installed at the communication point. Several upward-protruding locking teeth 43 are installed inside the hollow section. One end of the pin 6 abuts against the locking teeth 43, and the other end protrudes into the second opening 21. When the second locking arm 32 enters the second opening 21, the pin 12 engages with the arc-shaped groove 321. Alternating fixed rings 7 and rotating wheels 8 are fitted on the outer side of the main body 42. Both the fixed rings 7 and the rotating wheels 8 are annular with the same outer diameter. The fixed rings 7 have a fourth groove 72 that engages with the locking teeth 42. The fixed rings 7 are fitted on the outer side of the locking teeth 42, and the inner shape of the fixed rings matches the shape of the main body 42. Therefore, the fixed rings 7 It cannot rotate on the main body 42; the rotating wheel 8 is located on the same side of each fixed ring 7, and the rotating wheel 8 is provided with a fifth groove 82. The fifth groove 82 and the fourth groove 72 have the same shape and can both cooperate with the locking teeth 42; the inner ring of the rotating wheel 8 is circular, so the rotating wheel 8 can rotate on the main body 42.
[0021] The fixed ring 7 is provided with a flexible locking protrusion 71, and the rotating wheel 8 is provided with an arc-shaped third protrusion 81. The fixed ring 7 and the rotating wheel 8 are fitted with a combination wheel 9. The inner side of the numbers on the outer side of the combination wheel 9 is provided with a sixth groove 91 that cooperates with the flexible locking protrusion 71 and the third protrusion 81. The sixth groove 91 of each combination wheel 9 corresponds to a pair of flexible locking protrusions 71 and third protrusions 81. When the combination wheel 9 rotates, the third protrusion 81 moves the rotating wheel 8 together, and the flexible locking protrusion 71 is forced to push to the next sixth groove 91 to cooperate with it when the combination wheel 9 rotates. At this time, the flexible locking protrusion 71 resets, and the lock body makes a clicking sound to indicate that the user has completed one rotation.
[0022] When the second locking arm 32 enters the second opening 21 and the locking hole 411, the ball 12 engages with the arc-shaped groove 321. When all the fourth grooves 72 and the fifth grooves 82 are in a straight line, when the second locking arm 32 is pulled out, the ball 12 is pushed inward and pushes the locking tooth body inward, so that the second locking arm 32 can leave the locking hole 411. When the fourth grooves 72 and the fifth grooves 82 are not in a straight line, the ball 6 cannot be pushed inward, so the second locking arm 32 cannot be pulled out.
[0023] The outer sidewall of the locking hole 411 is provided with a second tangent parallel to the horizontal plane, which restricts the movement space of the second locking arm 32 after locking. This prevents the second locking arm 32 from being stuck to the left or right due to external force after locking, thereby pushing the ball 12 slightly inward, reducing the gap between the fixing ring 7 and the rotating wheel 8, increasing the friction between the fixing ring 7 and the rotating wheel 8, and causing the code wheel 9 to be unable to rotate.
[0024] This utility model of a combination padlock uses a fixing hole 412 on the outer side of the lock cylinder head 41 and a through hole on the outer side of the second base 2. A screw is used to fix the second base 2 to the fixing hole 412 of the lock cylinder head 41 through the through hole, thus preventing the second base 2 from falling off when not in use. A second slit is provided on the outer side of the lock cylinder hole 411 to restrict the movement space of the second locking arm 32 after locking, preventing the second locking arm 32 from being jammed when moving left or right after locking. Slightly pushing the pin 12 inward increases the friction between the fixing ring 7 and the rotating wheel 8, thus preventing the combination wheel 9 from rotating.
[0025] Finally, it should be noted that the above embodiments only illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A combination padlock, comprising a first base (1) and a second base (2), wherein the upper end of the first base (1) is provided with a first opening (11) and the inner side is provided with a first groove, the upper end of the second base (2) is provided with a second opening (21) and the inner side is provided with a second groove, and a lock cylinder (4) is connected between the first groove of the first base (1) and the second groove of the second base (2); the lock cylinder (4) includes a lock cylinder head (41) and a body (42); a lock beam (3) is provided at the first opening (11) and the second opening (21), the lock beam (3) includes a first lock arm (31) and a second lock arm (32), and the lower end of the second lock arm (32) is provided with an inwardly curved groove (321); characterized in that, The lock cylinder head (41) has a locking hole (411) above it that is opposite to the second opening (21), and a fixing hole (412) is provided on the outside. The second base (2) has a through hole on the outside that is opposite to the fixing hole (412), and a screw (5) passes through the through hole and is fixed on the fixing hole (412). The body (42) has a hollow part in the middle, which is connected to the second opening (21) of the lock cylinder head (41). A ball (6) is provided at the connection point. Several upward protruding locking teeth (43) are provided in the hollow part. One end of the ball (6) abuts against the locking teeth (43), and the other end protrudes into the second opening (21). The ball (6) cooperates with the arc-shaped groove (321).
2. The combination padlock of claim 1, wherein, The bottom of the first groove is provided with a first protrusion (12), and the bottom of the end of the body (42) is provided with a third groove (421) that cooperates with the first protrusion (12). The first protrusion (12) and the third groove (421) cooperate to fix the lock cylinder (4) on the first base (1).
3. The combination padlock of claim 2, wherein, The first locking arm (31) is located inside the first opening (11). The inner side of the first locking arm (31) is provided with a first cut surface (311), and the bottom is provided with a step (312) opposite to the first cut surface (311). A second protrusion (13) is provided on the inner wall of the upper end of the first opening (11) near the lock cylinder (4).
4. The combination padlock according to claim 1, characterized in that, The outer side of the body (42) is fitted with alternating fixed rings (7) and rotating wheels (8). Both the fixed rings (7) and rotating wheels (8) are annular and have the same outer diameter. The fixed rings (7) are provided with a fourth groove (72) that cooperates with the locking teeth (43). The fixed rings (7) are fitted on the outer side of the locking teeth (43) and the inner shape is adapted to the shape of the body (42). The rotating wheels (8) are located on the same side of each fixed ring (7). The rotating wheels (8) are provided with a fifth groove (82). The fifth groove (82) has the same shape as the fourth groove (72) and can cooperate with the locking teeth (43). The inner circle of the rotating wheels (8) is circular.
5. The combination lock of claim 4, wherein, The fixed ring (7) is provided with an elastic locking protrusion (71), and the rotating wheel (8) is provided with an arc-shaped third protrusion (81). The fixed ring (7) and the rotating wheel (8) are fitted with a password wheel (9). The inner side of the number on the outer side of the password wheel (9) is provided with a sixth groove (91) that cooperates with the elastic locking protrusion (71) and the third protrusion (81). The sixth groove (91) of each password wheel (9) corresponds to a pair of elastic locking protrusions (71) and third protrusions (81).
6. The combination padlock according to any one of claims 1-5, characterized in that, The outer sidewall of the locking hole (411) is provided with a second tangent parallel to the horizontal plane.