CN221002312U - Safety lock - Google Patents

Abstract

The utility model discloses a safety lock, and relates to the technical field of locks. Comprising the following steps: the anti-picking lock comprises an outer lock cylinder, an inner lock cylinder and a lock shell, wherein the outer lock cylinder and the inner lock cylinder are arranged in the lock shell, a self-breaking anti-picking transmission structure and a split washer head structure are arranged in the outer lock cylinder and the inner lock cylinder, the self-breaking anti-picking transmission structure comprises a transmission member inner core, an outer transmission member, a transmission member inner core sleeve, an inner transmission member and a blocking block, the transmission member inner core sleeve and the blocking block are used for connecting the outer transmission member and the inner transmission member in a linkage manner, the split washer head structure comprises an upper washer head and a lower washer head, and the upper washer head slides on the lower washer head; the lock shell comprises an outer lock shell and an inner lock shell, wherein the outer lock shell is connected with an anti-rotation sheet, and the anti-rotation sheet is used for clamping the outer lock shell after the lock shell is disconnected. The utility model can provide a safety lock with strong anti-prying function.

Description

Safety lock

Technical Field

The present utility model relates to locks, and more particularly to a security lock.

Background

The structure of the general lock is shown in fig. 1, and the outer lock cylinder 3 and the inner lock cylinder 8 are assembled in the lock shell 2 through the lock cylinder collar 9 and can rotate in the lock shell. The outer lock core 3 and the inner lock core 8 are internally provided with an outer cushion head 4, a transmission piece 5, a shifting wheel 6 and an inner cushion head 7, and the lock is internally provided with an anti-drilling pin 10, a number ball 14, a spring 12, a lower ball 13 and a door sealing ball 11.

When the outside is unlocked, as the key 1 is pushed, the pins 13 and the number pins 14 correspondingly move downwards, the butt ends of the pins 13 are flush with the outer circle of the lock cylinder 3, the lock cylinder 3 can rotate in the lock shell 2, the tip part of the key 1 props against the outer pad 4, the outer pad 4 pushes the transmission piece 5 to move inwards, the outer end of the transmission piece 5 is clamped in grooves of the lock cylinder 3 and the thumb wheel 6 at the same time, and the inner end of the transmission piece 5 is clamped in the groove of the inner lock cylinder 8 by pushing the key; the transmission part 5 is formed by connecting an inner part and an outer part through a hinge, and the inner end and the outer end of the transmission part can rotate respectively. Thus, the key 1 is rotated outside to rotate the thumb wheel 6, so as to achieve the unlocking function.

The lock of the device works in the same principle as the lock is unlocked from outside when the lock is unlocked from inside the door. When the key 1 is inserted from inside, the tip part of the key 1 props against the inner cushion head 7, the inner cushion head 7 pushes the transmission piece 5 to move outwards, the inner end of the transmission piece 5 is clamped in the grooves of the lock cylinder 8 and the thumb wheel 6 at the same time, and the outer end of the transmission piece 5 is fully clamped in the groove of the outer lock cylinder 3 by pushing the key. Thus, the key 1 can rotate the thumb wheel 6 from the door rotation, and the unlocking function is achieved.

Referring to fig. 2, fig. 2 is a perspective view (BOM view) showing the general lock fittings. When the lock is mounted on a door, the lock shell is usually exposed by about 10 mm and is used for mounting a handle guard plate 15, the guard plate 15 can be easily pried off by a flat screwdriver, the exposed 10 mm lock shell is easy to clamp so as to be pried off, the weakest position of the lock shell is at a central threaded hole, the lock shell can be disconnected at the position, and when the lock shell is pried off, the structure is shown in fig. 3, the thumb wheel 6 can be easily rotated, so that the lock is easily unlocked; therefore, the lock with the structure is easy to be prized off and has no anti-prizing function.

Therefore, how to design a lock with strong anti-picking function becomes a current urgent problem to be solved.

Disclosure of utility model

In order to solve at least one of the problems mentioned in the background art, the present utility model provides a security lock, which can provide a security lock with a strong anti-prying function.

The specific technical scheme provided by the embodiment of the utility model is as follows:

In a first aspect, there is provided a security lock comprising:

the anti-picking lock comprises an outer lock cylinder, an inner lock cylinder and a lock shell, wherein the outer lock cylinder and the inner lock cylinder are arranged in the lock shell, a self-breaking anti-picking transmission structure and a split washer head structure are arranged in the outer lock cylinder and the inner lock cylinder, the self-breaking anti-picking transmission structure comprises a transmission member inner core, an outer transmission member, a transmission member inner core sleeve, an inner transmission member and a blocking block, the transmission member inner core sleeve and the blocking block are used for connecting the outer transmission member and the inner transmission member in a linkage manner, the split washer head structure comprises an upper washer head and a lower washer head, and the upper washer head slides on the lower washer head;

The lock shell comprises an outer lock shell and an inner lock shell, wherein the outer lock shell is connected with an anti-rotation sheet, and the anti-rotation sheet is used for clamping the outer lock shell after the lock shell is disconnected.

Further, the inner transmission member, the upper cushion head and the lower cushion head are formed with cavities, and the cavities are used for accommodating the blocking blocks which fall into the outer transmission member and the inner core of the transmission member after being pulled out.

Further, the safety lock further comprises a first spring, one end of the first spring is connected with the blocking block, and the other end of the first spring is connected with the split cushion head structure.

Further, an easily-broken groove is arranged between the outer lock shell and the inner lock shell, and the anti-rotation piece comprises at least one bulge and a limiting end, and the bulge is spliced with the easily-broken groove;

The outer lock shell is also provided with a limiting groove, and the limiting groove is matched and spliced with the limiting end to clamp the outer lock shell after the lock shell is disconnected.

Further, a lock cylinder anti-drilling pin is arranged in the outer lock cylinder.

Further, a lock shell anti-drilling pin is arranged in the lock shell.

Further, the safety lock also comprises a number marble, a lower marble and a door sealing marble.

Further, the safety lock further comprises a second spring, one end of the second spring is connected with the self-breaking anti-prizing transmission structure, and the other end of the second spring is connected with the split washer head structure.

Further, the safety lock further comprises a lock cylinder collar, and the outer lock cylinder and the inner lock cylinder are assembled in the lock shell through the lock cylinder collar.

Further, the safety lock further comprises a third spring.

Further, the number of the anti-drilling pins of the lock cylinder is two.

The embodiment of the utility model has the following beneficial effects:

According to the safety lock provided by the embodiment of the utility model, when the lock shell is pried, the lock shell is extremely easy to break at the position of the breakable groove, but at the moment, the outer lock shell can still rotate the thumb wheel under the condition that the outer lock shell is broken but not far away from the thumb wheel, at the moment, the risk of prizing the lock is still existed, at the moment, the broken outer lock shell can be clamped by the anti-rotation piece, at the moment, the outer lock shell cannot rotate, the anti-rotation piece which is separated from the outer lock shell must be pulled out, meanwhile, the inner core of the transmission piece is pulled out, the blocking block falls into a cavity formed by the inner transmission piece and the split washer, the inner transmission piece cannot retract into a hole of the inner lock cylinder, the inner transmission piece, the thumb wheel and the inner lock cylinder are clamped together through lugs of the inner transmission piece, and the thumb wheel cannot rotate under the condition that the inner lock cylinder does not rotate, so that the thumb wheel is effectively prevented from rotating. By adopting the technical means, the lock cannot be continuously pried to unlock through the outer lock shell rotating dial wheel, and the anti-prizing capacity of the lock is further improved. Simultaneously, after the lock shell is disconnected from the frangible groove, the key is inserted into the inner lock cylinder, the split upper pad head can be pushed to move, after the key is completely inserted into the lock cylinder, the inner lock cylinder can rotate to drive the inner transmission piece to rotate together with the thumb wheel, so that the inner unlocking can be realized, and the lock using experience of a user after the lock is pried can be improved while the anti-picking lock capability is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic diagram of a prior art lock;

FIG. 2 shows a schematic perspective view (BOM) of a prior art lock;

FIG. 3 is a schematic view of a prior art lock after being pried out by violence;

FIG. 4 shows a schematic cross-sectional view of the safety lock of the present utility model;

FIG. 5 shows a schematic view of the internal structure of the safety lock of the present utility model after being pried out by violence;

FIG. 6 is a schematic view showing the structure of an anti-rotation plate in the safety lock of the present utility model;

FIG. 7 shows a schematic structural diagram of a self-breaking anti-pry transmission structure in accordance with one embodiment of the present utility model;

FIG. 8 is a schematic view showing an internal structure of a state in which a security lock is not inserted into a key according to an embodiment of the present utility model;

FIG. 9 shows a schematic perspective view (BOM) of a security lock according to one embodiment of the utility model;

FIG. 10 is a schematic view showing an internal structure of a security lock according to an embodiment of the present utility model when the security lock is opened outside a key door;

FIG. 11 is a schematic view showing an internal structure of a security lock according to an embodiment of the present utility model when opened in a key door;

FIG. 12 is a schematic view showing the internal structure of a security lock according to an embodiment of the present utility model when a key is unlocked internally after the lock is pried out by violence;

FIG. 13 shows a schematic cross-sectional view of a security lock housing frangible groove in accordance with one embodiment of the utility model;

FIG. 14 illustrates a second schematic cross-sectional view of a security lock case frangible groove in accordance with one embodiment of the utility model;

Fig. 15 shows a schematic structural view of an outer cylinder of a security lock according to an embodiment of the present utility model;

FIG. 16 illustrates a schematic structural view of a security lock drive core in accordance with one embodiment of the utility model;

FIG. 17 shows a schematic structural view of a security lock outer drive in accordance with one embodiment of the utility model;

FIG. 18 illustrates a schematic diagram of a security lock thumb wheel in accordance with one embodiment of the utility model;

FIG. 19 shows a schematic structural view of a transmission in a security lock in accordance with one embodiment of the utility model;

FIG. 20 shows a schematic structural view of a safety lock block according to one embodiment of the present utility model;

FIG. 21 shows a schematic part construction of a safety lock upper and lower shim according to one embodiment of the present utility model;

FIG. 22 shows a schematic view of the combined structure of a safety lock upper and lower cushion head according to one embodiment of the utility model;

FIG. 23 shows a schematic diagram of the structure of an internal lock cylinder of a security lock in accordance with one embodiment of the utility model;

FIG. 24 is a schematic cross-sectional view of a security lock based on another anti-rotation tab in accordance with one embodiment of the utility model;

FIG. 25 is a schematic view showing the internal structure of a safety lock based on another anti-rotation tab after being forcibly pried apart in accordance with one embodiment of the present utility model;

FIG. 26 shows a schematic structural view of another anti-rotation tab according to one embodiment of the utility model;

FIG. 27 illustrates a schematic cross-sectional view of a mating frangible groove of another anti-rotation tab in accordance with one embodiment of the present utility model;

Reference numerals: 1. a key; 2. a lock case; 3. a lock core; 4. an outer cushion head; 5. a transmission member; 6. a thumb wheel; 7. an inner cushion head; 8. an inner lock core; 9. a lock cylinder collar; 10. drilling prevention pin; 11. sealing door marble; 12. a spring; 13. a lower marble; 14. number marble; 15. a guard board; 17. a lock case; 18. an outer lock core; 19. a driving medium inner core; 20. an outer transmission member; 21. a lock cylinder collar; 22. a thumb wheel; 23. a driving medium inner core sleeve; 24. an inner transmission member; 25. a blocking piece; 26. a top pad head; 27. a lower cushion head; 28. an inner lock core; 29. a first spring; 30. a second spring; 31. number marble; 32. a lower marble; 33. a third spring; 34. sealing door marble; 35. an anti-rotation sheet; 36. anti-drilling pin of lock cylinder; 37. the lock shell is resistant to drilling.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that throughout this specification and the claims, unless the context clearly requires otherwise, the words "comprise", "comprising", and the like, are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".

It should also be appreciated that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

Example 1

The present utility model provides a security lock, with reference to figures 4 to 6, comprising: the outer lock cylinder 18, the inner lock cylinder 28 and the lock shell 17, the outer lock cylinder 18 and the inner lock cylinder 28 are arranged in the lock shell 17, a self-breaking anti-picking transmission structure and a split washer structure are arranged in the outer lock cylinder 18 and the inner lock cylinder 28, the self-breaking anti-picking transmission structure comprises a transmission member inner core 19, an outer transmission member 20, a transmission member inner core sleeve 23, an inner transmission member 24 and a blocking block 25, the transmission member inner core 19, the transmission member inner core sleeve 23 and the blocking block 25 are used for connecting the outer transmission member 20 and the inner transmission member 24 in a linkage mode, the split washer structure comprises an upper washer 26 and a lower washer 27, and the upper washer 26 slides on the lower washer 27; the lock case 17 includes an outer lock case and an inner lock case, the outer lock case is connected with an anti-rotation sheet 35, and the anti-rotation sheet 35 is used for clamping the outer lock case after the lock case 17 is disconnected.

Specifically, referring to fig. 13 and 14, when the lock housing 17 is damaged by violence, the lock housing 17 is broken at the frangible groove, and the anti-rotation piece 35 clamps the outer lock housing at this time, preventing the outer lock housing from being broken but not being far away from the thumb wheel 22, so as to prevent the risk of prying open the lock after the outer lock housing is broken. At this time, the outer lock shell can only be pulled out continuously and separated from the anti-rotation piece, so that the lock cannot be opened continuously by unlocking the lock through the rotation of the dial wheel 22 by the outer lock shell, and the anti-unlocking capacity is further improved.

In some embodiments, the inner driver 24, upper cushion head 26, and lower cushion head 27 are formed with cavities for receiving the stop blocks 25 that fall into after the outer driver 20 and driver core 19 are pulled out.

Specifically, after the outer lock case continues to be pulled out and is separated from the rotation preventing piece 35, the transmission member inner core 19 is pulled out together with the outer lock case/outer cylinder 18/outer transmission member 20, the inner connection member simultaneously moves outward, the inner connection member is separated from the blocking piece 25, and the blocking piece 25 falls into a cavity formed by the inner transmission member 24 and the split cushion head (including the upper cushion head 26 and the lower cushion head 27). At this time, the inner driving member 24 cannot be retracted into the hole of the inner lock cylinder 28, the inner driving member 24, the thumb wheel 22 and the inner lock cylinder 28 are clamped together by the lugs of the inner driving member 24, and the thumb wheel 22 cannot rotate under the condition that the inner lock cylinder 28 does not rotate, so that the thumb wheel 22 is effectively prevented from rotating. Under the condition that the outer lock shell is pried off, the outside cannot be unlocked, and the anti-prizing capacity of the lock is further improved.

In some embodiments, referring to fig. 9, the security lock further includes a cylinder collar 21, and the outer cylinder 18 and the inner cylinder 28 are assembled within the lock housing 17 via the cylinder collar 21.

In some embodiments, a breakable slot is further provided between the outer lock shell and the inner lock shell, the anti-rotation piece comprises at least one protrusion and a limiting end, and the protrusion is inserted into the breakable slot; the outer lock shell is also provided with a limiting groove, and the limiting groove is matched and spliced with the limiting end to clamp the outer lock shell after the lock shell is disconnected.

Specifically, the outer lock cylinder 18 and the inner lock cylinder 28 are rotatable within the lock housing 17. The interiors of the outer lock cylinder 18 and the inner lock cylinder 28 are equipped with a self-breaking pick-proof transmission structure (fig. 7) and a split washer head structure (fig. 21 and 22). The self-breaking pick-proof transmission structure comprises a transmission member inner core 19, a transmission member inner core sleeve 23, a blocking block 25, an outer transmission member 20 and an inner transmission member 24. The transmission member inner core 19, the transmission member inner core sleeve 23 and the blocking block 25 combine the outer transmission member 20 and the inner transmission member 24 together to realize the linkage. The outer transmission piece 20 and the inner transmission piece 24 are linked under the pushing of a key, so that the normal inner and outer unlocking functions are realized; the split cushion head structure consists of a split upper cushion head 26 and a split lower cushion head 27, wherein the upper cushion head 26 can slide on the lower cushion head 27. The lock case 17 is broken at the breaking groove (refer to fig. 13 and 14), and the anti-rotation piece 35 clamps the outer lock case at this time, so that the outer lock case is prevented from rotating the thumb wheel 22 under the condition that the outer lock case is broken but not far away from the thumb wheel 22, and the risk that the outer lock case is pried open by prying the lock is avoided. At this time, the outer lock shell can only be pulled out continuously and separated from the anti-rotation piece 35, so that the lock cannot be pried and unlocked continuously through the outer lock shell rotating thumb wheel 22, after the outer lock shell is pulled out continuously and separated from the anti-rotation piece 35, the inner core 19 of the transmission member is pulled out, the blocking block 25 falls into the cavity formed by the inner transmission member 24 and the split lower cushion head 27, the inner transmission member 24 is blocked from being retracted into the hole of the inner lock cylinder 28, and the inner transmission member 24, the thumb wheel 22 and the inner lock cylinder 28 are clamped together through the inner transmission member 24, so that the self-locking function is realized; meanwhile, the inner lock cylinder 28 is inserted into the door at this time, the split upper cushion head 26 can be pushed to move outwards, the key can be completely inserted into the inner lock cylinder 28, and the unlocking function in the door can be realized by rotating the key at this time. The self-breaking pick-proof transmission structure is shown in fig. 7, the structure of the outer lock core 18 is shown in fig. 15, the structure of the transmission member inner core 19 is shown in fig. 16, the structure of the outer transmission member 20 is shown in fig. 17, the structure of the thumb wheel 22 is shown in fig. 18, the structure of the inner transmission member 24 is shown in fig. 19, the structure of the blocking block 25 is shown in fig. 20, the structure of the split cushion head is shown in fig. 21 and fig. 22, and the structure of the inner lock core 28 is shown in fig. 23. For example, the anti-rotation piece 35 may include a plurality of (two or more) protrusions and a limiting end, and referring to fig. 4 to 6, the anti-rotation piece 35 includes two protrusions and a limiting end as an example, where one protrusion is inserted into a frangible groove, the frangible groove is set in a vertical direction, the two protrusions are respectively connected to two sides of the limiting end, the protrusions are disposed below the limiting end, and the limiting groove is inserted into the limiting end in a matched manner to be used for locking the outer lock case after the lock case is broken. For example, the anti-rotation piece 35 may also include only one protrusion and one limiting end, referring to fig. 24-27, the frangible groove is set to be transverse, referring to fig. 24, the protrusion is set on the left side of the limiting end, the protrusion is connected with the limiting end, the protrusion is inserted into the frangible groove set to be transverse, and the limiting groove is matched with the limiting end to be inserted into the limiting end to be used for locking the outer lock shell after the lock shell is broken.

In some embodiments, the safety lock further comprises a first spring 29, one end of the first spring 29 is connected to the blocking block 25, and the other end of the first spring 29 is connected to the split washer structure.

Specifically, the first spring 29 is provided to prevent the blocking piece 25 from falling into the center hole of the split cushion head when the blocking piece 25 is ready to fall into the cavity formed by the inner transmission member 24 and the split cushion head.

In some embodiments, the security lock is internally fitted with a plug anti-drill pin 36, a lock housing anti-drill pin 37, a combination pin 31, a second spring 30, a third spring 33, a lower pin 32, and a door seal pin 34.

In some embodiments, the number of lock cylinder anti-drill pins 36 is two.

Specifically, the number of lock cylinder anti-drilling pins 36 may be two, and the number of lock shell anti-drilling pins 37 may be two. The number of anti-drilling pins can be arranged according to actual requirements.

The safety lock mainly comprises the following six states:

Specifically, one end of the second spring 30 is connected with the self-breaking pick-proof transmission structure, and the other end of the second spring 30 is connected with the split cushion head structure. When no key is inserted, referring to fig. 8, the second spring 30 moves outwards against the self-breaking anti-picking transmission structure, the inner transmission member 24 and the thumb wheel 22 are clamped together, the outer transmission member 20 and the thumb wheel 22 are in a disengaged state, the thumb wheel 22 is clamped together by the inner transmission member 24 and the inner lock cylinder 28, and the thumb wheel is in a self-locking state, and is recorded as a state one (normal self-locking).

Specifically, when the lock is unlocked from the outside, referring to fig. 10, a key is inserted, and the key pushes the self-breaking pick-proof transmission structure to move inwards, so that the inner transmission member 24 and the thumb wheel 22 are separated, and at this time, the thumb wheel 22 and the outer transmission member 20 are clamped together; the key pushes the pins to move downwards simultaneously, the butt ends of the pins are flush with the outer circle of the outer lock cylinder 18, the outer lock cylinder 18 can rotate in the lock shell 17, and the outer lock cylinder 18 can be rotated by rotating the key, so that the thumb wheel 22 is rotated, unlocking is realized, and the lock is recorded as a second state (normal unlocking from outside).

Specifically, when unlocking from the inside, referring to fig. 11, a key is inserted to push the split upper pad head 26 to move outwards, the key simultaneously pushes the pins to move downwards, the butt ends of the pins are flush with the outer circle of the inner lock cylinder 28, the inner lock cylinder 28 can rotate in the lock shell 17, the inner lock cylinder 28 can be rotated by rotating the key, and the thumb wheel 22 is rotated, so that unlocking is realized, and the state III (unlocking from the inside) is recorded at the moment.

Specifically, when the lock is pried violently from the outside, the lock case 17 is broken at the frangible groove (refer to fig. 13 and 14), and the anti-rotation piece 35 clamps the outer lock case at this time, preventing the outer lock case from being broken but not being far away from the thumb wheel 22, and being capable of rotating the thumb wheel 22, thereby avoiding the risk of prizing the lock after the outer lock case is broken. At this time, the outer lock case can only be pulled out continuously and separated from the anti-rotation plate, and the lock cannot be unlocked continuously by picking the lock through the rotation of the dial wheel 22 by the outer lock case. At this time, when the lock case 17 is broken from the breaking groove, the outside of the lock case 17 is blocked by the rotation preventing piece 35 and cannot rotate, and the state four (the state in which the outside of the outer lock case is caught by the rotation preventing piece 35 by an external violent prying lock) is described as a state four, referring to fig. 4.

Specifically, after the outer lock shell is pulled out continuously and is separated from the anti-rotation piece 35, the inner core 19 of the transmission member is pulled out, the blocking block 25 falls into the cavity formed by the inner transmission member 24 and the split lower pad head 27, the inner transmission member 24 is blocked from being retracted into the hole of the inner lock cylinder 28, and the inner transmission member 24, the dial wheel 22 and the inner lock cylinder 28 are clamped together through the inner transmission member 24, so that the self-locking function is realized. The thumb wheel 22 is not rotated from the outside of the door and the lock is not unlocked. This is referred to as a state five (the state in which the outer lock case is pulled out continuously and is separated from the rotation preventing piece 35, and is self-locked), and fig. 5 is referred to.

Specifically, referring to fig. 12, when the lock housing 17 is opened, the key is inserted to push the split upper pad 26 to move outwards, and simultaneously push the pins to move downwards, the butt ends of the pins are flush with the outer circle of the inner lock core 28, the inner lock core 28 can rotate in the lock housing 17, and the inner lock core 28 can be rotated by rotating the key, so that the thumb wheel 22 can be rotated, thereby realizing unlocking from the inside, and the lock is marked as a state six (when the lock is opened from the inside after picking).

In this embodiment, when the lock shell is pried, the lock shell is very easy to break in the frangible groove department, but the outer lock shell still can rotate the thumb wheel under the circumstances that breaks off but does not keep away from the thumb wheel this moment, still there is the risk of prizing the lock and prizing open this moment, can block the outer lock shell of breaking off through anti-rotation piece this moment, the outer lock shell can't rotate this moment, must outwards pull out and break away from outer lock shell anti-rotation piece, simultaneously the driving member inner core pulls out, the blocking piece falls into the hole of the interior driving member of cavity that interior driving member and components of a whole that can function independently filler formed, interior driving member, thumb wheel and interior lock core are in the same place through interior driving member lug card, under the condition that interior lock core is not rotated, the thumb wheel can not rotate, prevent effectively like this that the thumb wheel rotates. By adopting the technical means, the lock cannot be continuously pried to unlock through the outer lock shell rotating dial wheel, and the anti-prizing capacity of the lock is further improved. Simultaneously, after the lock shell is disconnected from the frangible groove, the key is inserted into the inner lock cylinder, the split upper pad head can be pushed to move, after the key is completely inserted into the lock cylinder, the inner lock cylinder can rotate to drive the inner transmission piece to rotate together with the thumb wheel, so that the inner unlocking can be realized, and the lock using experience of a user after the lock is pried can be improved while the anti-picking lock capability is improved.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the utility model.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (10)

1. A security lock, comprising:

the anti-picking lock comprises an outer lock cylinder, an inner lock cylinder and a lock shell, wherein the outer lock cylinder and the inner lock cylinder are arranged in the lock shell, a self-breaking anti-picking transmission structure and a split washer head structure are arranged in the outer lock cylinder and the inner lock cylinder, the self-breaking anti-picking transmission structure comprises a transmission member inner core, an outer transmission member, a transmission member inner core sleeve, an inner transmission member and a blocking block, the transmission member inner core sleeve and the blocking block are used for connecting the outer transmission member and the inner transmission member in a linkage manner, the split washer head structure comprises an upper washer head and a lower washer head, and the upper washer head slides on the lower washer head;

The lock shell comprises an outer lock shell and an inner lock shell, wherein the outer lock shell is connected with an anti-rotation sheet, and the anti-rotation sheet is used for clamping the outer lock shell after the lock shell is disconnected.

2. The safety lock according to claim 1, wherein the inner transmission member, the upper cushion head and the lower cushion head are formed with cavities for receiving the blocking blocks fallen into after the outer transmission member and the transmission member inner core are pulled out.

3. The safety lock of claim 1, further comprising a first spring, one end of the first spring being connected to the blocking block and the other end of the first spring being connected to the split washer head structure.

4. The safety lock according to claim 1, wherein a frangible groove is further provided between the outer lock shell and the inner lock shell, the anti-rotation tab comprises at least one protrusion and a limiting end, the protrusion is inserted into the Yi Duancao;

The outer lock shell is also provided with a limiting groove, and the limiting groove is matched and spliced with the limiting end to clamp the outer lock shell after the lock shell is disconnected.

5. The safety lock of claim 1, wherein the outer lock cylinder has a lock cylinder anti-drill disposed therein.

6. The safety lock of claim 1, wherein a lock housing anti-drill is disposed within the lock housing.

7. The safety lock of claim 1, further comprising a combination pin, a lower pin, and a door seal pin.

8. The safety lock of claim 1, further comprising a second spring, wherein one end of the second spring is connected to the self-breaking anti-pry transmission structure, and the other end of the second spring is connected to the split washer structure.

9. The safety lock of claim 1, further comprising a lock cylinder collar, the outer lock cylinder and the inner lock cylinder fitting within the lock housing via the lock cylinder collar.

10. The safety lock of claim 1, further comprising a third spring.