Tablet coded lock

Abstract

The utility model discloses a flat coded lock which comprises a lock shell, a lock tongue is arranged on one side of the lock shell in a sliding mode, and a code counter lock assembly is arranged on the other side of the lock shell. A first spring is arranged at one end of the spring bolt, and an unlocking button assembly for driving the spring bolt to retract into the lock shell is arranged at the other end of the spring bolt; the code back locking assembly comprises one or more code wheels, each code wheel is correspondingly provided with a back locking pin and a reset elastic piece, each code wheel is provided with a concave part capable of being matched with one end of the corresponding back locking pin, and the other end of each back locking pin is arranged opposite to a back locking groove formed in the spring bolt. When the code wheel rotates to the back locking position, the code wheel can push the back locking pin to move forwards to be inserted into the back locking groove; when the password wheel rotates to an unlocking position, the reset elastic piece pushes the counter lock pin to move backwards, so that one end part of the counter lock pin slides into the concave part, and the other end part of the counter lock pin is separated from the counter lock groove; the mechanical door lock has the advantage of low cost, can be unlocked through a password, does not need to carry a key, and is convenient to use.

Description

Technical Field

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

[0002] A door lock, as the name suggests, is a device used to lock a door to prevent others from opening it; it also has windproof and anti-theft functions.

[0003] Door locks are generally divided into mechanical door locks and electronic door locks. Although electronic door locks are becoming more and more popular, they are relatively expensive. Therefore, due to their low cost and other advantages, mechanical door locks still have a very large market demand. Existing mechanical door locks generally refer to mechanical key door locks. When opening the door lock, you need to carry the key with you, which is inconvenient and the key is easy to lose, resulting in the problem of not being able to open the door lock. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a tablet combination lock.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A flat combination lock includes a lock shell, a latch is slidably disposed on one side of the lock shell, and a combination deadbolt assembly for locking the latch is disposed on the other side;

[0007] One end of the latch is provided with a first spring that drives the latch to extend out of the lock housing, and the other end is provided with an unlocking button assembly that drives the latch to retract into the lock housing.

[0008] The combination lock assembly includes one or more combination wheels, each combination wheel is provided with a locking pin and a reset spring, and the combination wheel is provided with a recess that can be adapted to one end of the locking pin, and the other end of the locking pin is provided opposite to the locking groove opened on the lock tongue;

[0009] When the combination wheel is rotated to the deadbolt position, the recessed part of the combination wheel is misaligned with the deadbolt pin, which pushes the deadbolt pin forward to press the reset spring into the deadbolt groove; when the combination wheel is rotated to the unlocked position, the reset spring pushes the deadbolt pin backward, so that one end of the deadbolt pin slides into the recessed part, and the other end separates from the deadbolt groove.

[0010] The present invention further comprises: the cipher wheel includes a cipher wheel seat and a cipher wheel body sleeved on the cipher wheel seat; the cipher wheel body is provided with a plurality of slots spaced apart circumferentially; the cipher wheel seat is provided with a locking block adapted to the slot; the locking block cooperates with the slot to fix the cipher wheel body on the cipher wheel seat.

[0011] The present invention further includes a support spring located below the cipher wheel base, wherein a recessed portion is located on the side wall of the cipher wheel base.

[0012] The present invention further includes: a pressure plate rotatably disposed inside the lock housing; a pressure rod that cooperates with the combination wheel seat is provided on one side of the pressure plate; the pressure rod is inserted into an annular groove on the side wall of the combination wheel seat.

[0013] Pushing up one side of the pressure plate causes the pressure rod on the other side of the pressure plate to lower the combination wheel seat, causing the card block to separate from the card slot.

[0014] The present invention further includes: the unlocking button assembly includes a button base and a button mounted on the button base; the lower end of the button passes through the button base and is placed in the mating hole of the lock tongue; pressing the button down causes the upper end of the lock tongue to retract into the lock housing.

[0015] One end of the button base is provided with a push inclined surface, and the other end is provided with a second spring to drive the button base to reset;

[0016] The pressure plate is equipped with a swing arm that cooperates with the pushing inclined surface. When the button is pushed upward, the button seat slides upward with the button, and the pushing inclined surface squeezes the swing arm upward, driving the pressure rod on the other side of the pressure plate to press down on the code wheel seat.

[0017] The present invention further includes a locking plate, which is fixedly connected to the bottom of the button base;

[0018] One side of the lock plate is provided with a locking groove corresponding to the anti-lock groove. When the combination wheel is in the anti-lock position, the anti-lock pin is inserted into both the anti-lock groove and the locking groove, locking the lock plate onto the lock case.

[0019] The present invention further includes a positioning protrusion at the upper end of the unlocking spring, which cooperates with the positioning groove of the code wheel body to restrict the rotation of the code wheel.

[0020] The present invention further includes: the anti-locking pin is provided with a stop groove that cooperates with the unlocking spring, and the spring abuts against the side wall of the stop groove near the key wheel seat.

[0021] The beneficial effects of this utility model are as follows: The bolt of this combination lock extends out of the lock case under the drive of the first spring. When the combination wheel is rotated to the deadbolt position, the recessed part of the combination wheel is misaligned with the deadbolt pin, which pushes the deadbolt pin forward, pressing the reset spring into the deadbolt groove, thus achieving deadbolt locking. When unlocking is required, rotating the combination wheel to the correct combination position, i.e., rotating the combination wheel to the unlock position, causes the reset spring to push the deadbolt pin backward, causing one end of the deadbolt pin to slide into the recessed part, while the other end separates from the deadbolt groove, thus unlocking the door. The bolt can then be pulled down by the unlock button assembly to retract it into the lock case, achieving unlocking. This design combines the low-cost advantages of mechanical locks with the convenience of using a combination lock, eliminating the need for a key. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a flat combination lock according to the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of a flat combination lock according to the present invention;

[0024] Figure 3 This is a diagram showing the engagement of the deadbolt and the bolt of a flat combination lock according to this utility model.

[0025] Figure 4 This is a schematic diagram illustrating the operation principle of changing the password on a flat combination lock according to this utility model.

[0026] Figure 5 This is a schematic diagram of the combination wheel structure of a flat combination lock according to the present invention;

[0027] Figure 6 This is a diagram showing the fit between the button base and the pressure plate of a flat combination lock according to this utility model.

[0028] Figure 7 This is a structural schematic diagram of the unlocking button assembly of a tablet combination lock according to the present invention;

[0029] Figure 8 This is a diagram showing the interaction between the button and the latch of a flat combination lock according to this utility model.

[0030] Figure 9 This is a diagram showing the engagement of the locking pin and unlocking spring of a flat combination lock according to this utility model.

[0031] Explanation of reference numerals in the attached drawings: 1. Lock case; 11. Lock tongue; 111. First spring; 112. Deadbolt groove; 113. Mating hole; 2. Combination deadbolt assembly; 21. Combination wheel; 211. Combination wheel seat; 2111. Locking block; 2112. Recess; 2113. Annular groove; 212. Combination wheel body; 2121. Locking groove; 2122. Positioning groove; 213. Support spring; 22. Deadbolt pin; 221. Abutting groove; 23. Reset spring; 231. Positioning protrusion; 3. Unlock button assembly; 31. Button seat; 311. Pushing ramp; 312. Second spring; 32. Button; 33. Lock plate; 331. Locking groove; 4. Pressure plate; 41. Pressure rod; 42. Swing arm. Detailed Implementation

[0032] See attached document Figures 1 to 9 This utility model provides a more detailed description of a flat-panel combination lock.

[0033] A flat combination lock includes a lock shell 1, a latch 11 slidably disposed on one side of the lock shell 1, and a combination deadbolt assembly 2 for locking the latch 11 disposed on the other side;

[0034] One end of the latch 11 is provided with a first spring 111 that drives the latch 11 to extend out of the lock case 1, and the other end is provided with an unlocking button assembly 3 that drives the latch 11 to retract into the lock case 1.

[0035] The combination lock assembly 2 includes one or more combination wheels 21. Each combination wheel 21 is provided with a locking pin 22 and a reset spring 23. The combination wheel 21 is provided with a recess 2112 that can be adapted to one end of the locking pin 22. The other end of the locking pin 22 is provided opposite to the locking groove 112 opened on the latch 11.

[0036] When the combination wheel 21 is rotated to the deadbolt position, the recess 2112 of the combination wheel 21 is misaligned with the deadbolt pin 22, which pushes the deadbolt pin 22 forward to press the reset spring 23 into the deadbolt groove 112; when the combination wheel 21 is rotated to the unlock position, the reset spring 23 pushes the deadbolt pin 22 backward, so that one end of the deadbolt pin 22 slides into the recess 2112 and the other end separates from the deadbolt groove 112;

[0037] The bolt 11 of this combination lock extends out of the lock case 1 under the drive of the first spring 111. When the combination wheel 21 is rotated to the deadbolt position, the recess 2112 of the combination wheel 21 is misaligned with the deadbolt pin 22, which pushes the deadbolt pin 22 forward to press the reset spring 23 into the deadbolt groove 112, thus achieving deadbolt locking. When unlocking is required, the combination wheel 21 is rotated to the correct combination position, that is, the combination wheel 21 is rotated to the unlock position. The reset spring 23 pushes the deadbolt pin 22 backward, so that one end of the deadbolt pin 22 slides into the recess 2112, and the other end separates from the deadbolt groove 112, thus achieving unlocking. The bolt 11 can then be pulled down by the unlock button assembly 3 to retract the bolt 11 into the lock case 1, thus unlocking. It has the low cost advantage of mechanical door locks and can be unlocked by combination, eliminating the need to carry a key, making it more convenient to use.

[0038] To enhance its security, this combination lock typically has three combination wheels 21. It can only be unlocked when all three combination wheels 21 are in the unlocked position, that is, when all three combination wheels 21 are correct.

[0039] The coded wheel 21 includes a coded wheel seat 211 and a coded wheel body 212 sleeved on the coded wheel seat 211. The coded wheel body 212 is provided with a plurality of slots 2121 spaced apart around its circumference. The coded wheel seat 211 is provided with a locking block 2111 that matches the slots 2121. The locking block 2111 cooperates with the slots 2121 to fix the coded wheel body 212 on the coded wheel seat 211, so that the coded wheel body 212 can be separated from the coded wheel seat 211 vertically. A support spring 213 is provided below the coded wheel seat 211, wherein the recessed part 2112 is provided on the side wall of the coded wheel seat 211.

[0040] To facilitate changing the combination lock, a pressure plate 4 is rotatably installed inside the lock housing 1. One side of the pressure plate 4 is provided with a pressure rod 41 that cooperates with the combination wheel seat 211. The pressure rod 41 is inserted into the annular groove 2113 on the side wall of the combination wheel seat 211. Pushing one side of the pressure plate 4 upward will cause the pressure rod 41 on the other side of the pressure plate 4 to depress the combination wheel seat 211, causing the locking block 2111 to separate from the locking groove 2121. This allows the combination wheel body 212 to be rotated, changing the corresponding number on the combination wheel body 212 that corresponds to the recessed groove on the combination wheel seat 211, thus realizing the change of the combination wheel 21 combination.

[0041] The unlocking button assembly 3 includes a button base 31 and a button 32 mounted on the button base 31. The lower end of the button 32 passes through the button base 31 and is placed in the mating hole 113 of the latch 11, wherein the mating hole 113 is longer than the lower end of the button 32 in the sliding direction. When the button 32 is pressed down, the button 32 drives the upper end of the latch 11 to retract into the lock housing 1. One end of the button base 31 is provided with a pushing inclined surface 311, and the other end is provided with a second spring to drive the button base 31 to reset. 312; The pressure plate 4 is provided with a swing arm 42 that cooperates with the pushing inclined surface 311. When the password needs to be changed, push the button 32 upward, and the button seat 31 slides upward with the button 32. The pushing inclined surface 311 presses the swing arm 42 upward, driving the pressure rod 41 on the other side of the pressure plate 4 to press down the password wheel seat 211. That is, after the password wheel body 212 is separated from the password wheel seat 211, the password wheel body 212 can be rotated to change the number that is opposite to the recessed groove of the password wheel body 212; thus completing the password change.

[0042] The unlocking button assembly 3 further includes a locking plate 33, which is fixedly connected to the bottom of the button base 31. One side of the locking plate 33 is provided with a locking groove 331 corresponding to the anti-lock groove 112. When the combination wheel 21 is in the anti-lock position, the anti-lock pin 22 is simultaneously inserted into the anti-lock groove 112 and the locking groove 331, locking the locking plate 33 onto the lock case 1. That is, if the combination of the combination wheel 21 is not completely correct, at least one anti-lock pin 22 will lock the locking plate 33, making it impossible to push the button 32 upward to change the combination. Only when the combination of all the combination wheels 21 is correct, all the anti-lock pins 22 are separated from the locking groove 331, so that the button 32 can be pushed upward to change the combination.

[0043] The upper end of the unlocking spring is provided with a positioning protrusion 231, which cooperates with the positioning groove 2122 of the code wheel body 212 to restrict the rotation of the code wheel 21.

[0044] The locking pin 22 is provided with a stop groove 221 that cooperates with the unlocking spring, and the spring abuts against the side wall of the stop groove 221 near the combination wheel seat 211. The above description is only a preferred embodiment of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions within the scope of this utility model's concept are within the protection scope of this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A flat combination lock, comprising a lock shell; characterized in that: The lock housing has a slidable latch on one side and a combination lock assembly for locking the latch on the other side. One end of the latch is provided with a first spring that drives the latch to extend out of the lock housing, and the other end is provided with an unlocking button assembly that drives the latch to retract into the lock housing. The combination lock assembly includes one or more combination wheels, each combination wheel is provided with a locking pin and a reset spring, and the combination wheel is provided with a recess that can be adapted to one end of the locking pin, and the other end of the locking pin is provided opposite to the locking groove opened on the lock tongue; When the combination wheel is rotated to the deadbolt position, the recessed part of the combination wheel is misaligned with the deadbolt pin, which pushes the deadbolt pin forward to press the reset spring into the deadbolt groove; when the combination wheel is rotated to the unlocked position, the reset spring pushes the deadbolt pin backward, so that one end of the deadbolt pin slides into the recessed part, and the other end separates from the deadbolt groove.

2. A tablet combination lock according to claim 1, characterized in that: The cipher wheel includes a cipher wheel base and a cipher wheel body sleeved on the cipher wheel base. The cipher wheel body is provided with a plurality of slots spaced apart around its circumference. The cipher wheel base is provided with a locking block that matches the slot. The locking block cooperates with the slot to fix the cipher wheel body on the cipher wheel base.

3. A tablet combination lock according to claim 2, characterized in that: A support spring is provided below the cipher wheel base, and the recessed part is provided on the side wall of the cipher wheel base.

4. A flat panel combination lock according to claim 2 or 3, characterized in that: A pressure plate is rotatably installed inside the lock case. One side of the pressure plate is provided with a pressure rod that cooperates with the combination wheel seat. The pressure rod is inserted into an annular groove on the side wall of the combination wheel seat. Pushing up one side of the pressure plate causes the pressure rod on the other side of the pressure plate to lower the combination wheel seat, causing the card block to separate from the card slot.

5. A tablet combination lock according to claim 4, characterized in that: The unlocking button assembly includes a button base and a button mounted on the button base. The lower end of the button passes through the button base and is placed in the mating hole of the lock tongue. When the button is pressed down, the button causes the upper end of the lock tongue to retract into the lock housing. One end of the button base is provided with a push inclined surface, and the other end is provided with a second spring to drive the button base to reset; The pressure plate is equipped with a swing arm that cooperates with the pushing inclined surface. When the button is pushed upward, the button seat slides upward with the button, and the pushing inclined surface squeezes the swing arm upward, driving the pressure rod on the other side of the pressure plate to press down on the code wheel seat.

6. A tablet combination lock according to claim 5, characterized in that: The unlock button assembly also includes a locking plate, which is fixedly connected to the bottom of the button base; One side of the lock plate is provided with a locking groove corresponding to the anti-lock groove. When the combination wheel is in the anti-lock position, the anti-lock pin is inserted into both the anti-lock groove and the locking groove to lock the lock plate onto the lock housing.

7. A flat-panel combination lock according to claim 2 or 3, characterized in that: The upper end of the unlocking spring is provided with a positioning protrusion, which cooperates with the positioning groove of the code wheel body to restrict the rotation of the code wheel.

8. A flat panel combination lock according to claim 1, 2, or 3, characterized in that: The anti-locking pin is provided with a stop groove that cooperates with the unlocking spring, and the spring abuts against the side wall of the stop groove near the key wheel seat.

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