Safety lock cylinder and safety lock

Abstract

The present invention discloses a safety lock core, comprising an outer lock core group, an inner lock core group, a lock shell and an anti-pull pull wheel, wherein the lock shell is provided with a wide groove for accommodating the anti-pull pull wheel, the end surface of the wide groove close to the outer lock core group is also provided with an elongated easy-to-break groove, the outer ring of the pull wheel is provided with a groove, the lock shell is provided with a boss extending into the groove to limit the pull wheel from being pulled out, and the present invention is also designed with an inner blocking block structure that can be sleeved on the main shaft, the inner blocking block automatically falls to the gap below it after the outer lock core group falls off, and blocks the inner transmission member from moving inward. The present invention solves the problems of poor anti-pull performance and low safety of the original lock core.

Description

Technical Field

[0001] The invention relates to a lock, in particular to a safety lock core. Background Art

[0002] When a general lock is unlocked with a key, the handle core and the knob rotate with the key, and the lock can be unlocked by turning the knob. If there is a hole in the door, the thief can use this hole to turn the knob to unlock the door. The inner part of a general lock is stuck together with the dial wheel but not with the outer lock core. The thief can insert a small thin piece into the key slot and turn the inner part to unlock the door. General locks have no anti-dialing function. After the outer lock shell of a general lock is disconnected, the dial wheel can be easily turned and the lock can be easily opened. General locks have no anti-breakage self-protection function.

[0003] like Figure 1 As shown, it is a common lock core structure in the prior art. When unlocking from the outside, as the key 2 is pushed forward, the pins 9 and 10 move downward accordingly, the pins 9 and the outer circles of the lock core 3 are flush, the lock core 3 can rotate in the lock shell 1, and the tip of the key 2 is inserted into the groove of the inner part 4. The inner part 4 and the dial wheel 5 are connected together through the ear of the inner part, and the ear of the dial wheel 5 and the groove of the handle core 7 are stuck together (the function of the spring 6 is to support the inner part 4 so that the inner part is always connected to the dial wheel 5). In this way, rotating the key 2 from the outside can rotate the dial wheel 5 to achieve the function of unlocking. In the lock of this device, when the key 2 is rotated, the handle core 7 and the knob 8 also rotate together. As shown Figure 2 As shown, the groove width of a general lock core is 2.4 mm. A 2 mm steel wire head is slightly bent to push component 14 into the groove of inner component 4. The lock can be unlocked by rotating component 14. Moreover, the lock core can be easily pried off at the M5 threaded hole. After being pried off, the dial wheel is exposed to the outside, and the thief can easily open the door by rotating the dial wheel. This lock core has no anti-breakage self-protection function, which shows that the anti-dialing performance of general locks is very poor.

[0004] When the lock is installed on the door, the lock shell usually protrudes 10 mm on the door to install the handle guard. The guard can be easily pried off with a flat screwdriver. The exposed 10 mm lock shell is easy to clamp so that the outer lock shell can be pried off. When the outer lock shell is pried off, the structure is as follows: Figure 3 As shown, by rotating the inner part 4, the dial wheel can be easily rotated and the lock can be easily unlocked; as long as the outer lock shell is pried off, the lock will be opened. This kind of structural lock is not anti-pry at all and has no anti-pry function.

[0005] Therefore, how to design a lock core structure with high anti-prying performance and strong anti-prying function has become a problem to be solved urgently. Summary of the invention

[0006] The purpose of the present invention is to provide a safety lock core to solve the problems of poor anti-digging performance and low safety of the existing lock core.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A safety lock core comprises an outer lock core group, an inner lock core group, a lock shell and an anti-pull pull wheel, characterized in that the lock shell is provided with a wide groove for accommodating the anti-pull pull wheel, and an elongated easy-to-break groove is also provided on the end surface of the wide groove close to the outer lock core group. The outer ring of the pull wheel is provided with a groove, and the lock shell is correspondingly provided with a boss extending into the groove to limit the pull wheel from being pulled out.

[0009] Furthermore, the outer lock core group includes a main shaft, and the inner lock core group includes a thumbwheel core, an anti-rotation core and an unlocking core. The main shaft of the outer lock core group extends into the inner lock core group, and an internal transmission part and an internal blocking block are also sleeved on the main shaft. A gap for accommodating the inner blocking block is reserved in the thumbwheel core, and there is a distance below the gap from the inner blocking block to provide space for the inner blocking block to fall after the outer lock core group falls off.

[0010] Furthermore, the first end of the anti-rotation core is inserted into the interior of the thumbwheel core for connection, the first end of the unlocking core is inserted into the second end of the anti-rotation core and linked through an unlocking pin, and the unlocking core has a recessed structure, one side of the recessed structure is a ring-shaped cam.

[0011] Furthermore, the first end of the anti-rotation core has a slot. When the door is not unlocked, the No. 1 pin is stuck in the slot of the anti-rotation core. When the knob in the door is rotated, the unlocking core is driven to rotate, and the anti-rotation core is driven to move parallel inside and outside. After the anti-rotation core moves inward for a certain distance, the No. 1 pin is no longer stuck in the slot of the anti-rotation core, so that the anti-rotation core can rotate freely, thereby driving the dial core to rotate.

[0012] Furthermore, the width of the wide groove is 16 to 28 mm.

[0013] Furthermore, the external lock core group also includes an external lock core, an external transmission member mother body, and an external transmission member mother body spring. The external transmission member main shaft is arranged in the external transmission member mother body. The external transmission member mother body is sleeved inside the external lock core. The external transmission member mother body is linked with the external lock core through the external transmission member blocking pin.

[0014] Furthermore, the unlocking pin extends into the recessed structure and moves along the inner wall surface of the recessed structure.

[0015] Furthermore, the anti-pull pull wheel is hollow inside, the outer lock core is inserted into the first end of the anti-pull pull wheel, and the pull wheel core, the inner transmission part and the inner blocking block are all located inside the anti-pull pull wheel.

[0016] Furthermore, there is a height difference between the bottom of the breakable groove and the bottom surface of the upper anti-pull pull wheel overlapped on the wide groove.

[0017] Compared with the prior art, the safety lock core provided by the present invention has the following technical effects:

[0018] 1. The present invention designs an easy-to-break groove structure on the lock shell, so that the position where the lock shell is broken occurs at the easy-to-break groove. At this time, the M5 threaded hole is also hidden in the lock body, the remaining lock core is also fixed in the lock body, and the groove of the dial wheel is combined with the boss on the lock shell, so that the remaining lock core and the dial wheel cannot be pulled out.

[0019] 2. The present invention is designed with a blocking block structure. After the outer lock core assembly falls off, the blocking block falls down to block the inner transmission member from moving inward. At this time, the dial wheel cannot rotate, thus realizing the self-locking function.

[0020] 3. The unlocking core of the present invention is designed with a recessed structure. When the unlocking core rotates with the knob, it will drive the anti-rotation core to move parallel inside and outside. At this time, the No. 1 pin is no longer stuck in the groove of the anti-rotation core, so that the anti-rotation core can rotate freely to achieve unlocking inside the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the lock core in the prior art is shown in FIG. Figure 1 .

[0022] Figure 2 The structure of the lock core in the prior art is shown in FIG. Figure 2 .

[0023] Figure 3 The structure of the lock core in the prior art is shown in FIG. Figure 3 .

[0024] Figure 4 Schematic diagram of the overall structure of the safety lock core in an embodiment of the present invention.

[0025] Figure 5 1 is a structural diagram of the safety lock core in an initial state when the door is locked in an embodiment of the present invention.

[0026] Figure 6 This is a structural diagram of the safety lock core in an embodiment of the present invention when it is unlocked outside the door.

[0027] Figure 7 It is a structural diagram of the safety lock core in the initial state when it is broken off from the lock in an embodiment of the present invention.

[0028] Figure 8 It is a structural diagram of the safety lock cylinder in an embodiment of the present invention when it is unlocked from the inside of the door after being broken off.

[0029] Fig. 9 Schematic diagram of the connection between the outer lock core assembly and the inner lock core assembly in an embodiment of the present invention.

[0030] Fig.10 Schematic diagram of the connection between the anti-rotation core and the thumbwheel core in an embodiment of the present invention.

[0031] Fig.11 Schematic diagram of the connection between the unlocking core and the anti-rotation core in an embodiment of the present invention.

[0032] Fig.12 Schematic diagram of the structure of the inner lock core assembly in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] Reference Figures 4 to 12As shown, an embodiment of the present invention provides a safety lock core, including an outer lock core group, an inner lock core group, a lock shell 21 and an anti-pull pull wheel 22, wherein the outer lock core group includes an outer lock core 31, an outer transmission component main shaft 32, an outer transmission component matrix 33, and an outer transmission component spring 34 that are assembled to each other, and the inner lock core group includes an inner transmission component 41, a pull wheel core 42, an anti-rotation core 43, an inner core spring 44, an unlocking core 45, and a knob 46 that are assembled to each other, the outer lock core group is roughly biased toward the outside of the door, and the inner lock core group is roughly biased toward the inside of the door, the lock shell includes an integrally formed left lock shell, a right lock shell and a lock shell connecting member, and an M5 threaded hole 215 (installation hole) is provided on the connecting member between the left lock shell and the right lock shell, wherein the left lock shell contains the outer lock core, and the right lock shell contains the anti-rotation core 43 and an unlocking core 45, a wide groove 211 for accommodating an anti-pull dial wheel is formed above the connecting piece, the wide groove 211 has a step shape, the anti-pull dial wheel 22 is just completely supported on the step, the dial head 222 is placed in a hollow groove in the middle of the wide groove and has a distance from the bottom of the hollow groove, and an elongated easy-to-break groove 212 is also provided on the connecting piece close to the left lock shell side, the easy-to-break groove 212 is also located on the end face of the wide groove 211, the bottom of the easy-to-break groove 212 has a height difference from the top face of the step, that is, when the anti-pull dial wheel 22 is placed on the step of the connecting piece, the bottom face of the anti-pull dial wheel 22 has a height difference from the bottom of the groove, and the width of the wide groove 211 is 16mm~28mm, preferably 24mm, which is much larger than the groove width of 2.4mm in the prior art. The outer ring of the thumbwheel is provided with a groove 221, which can be set as an annular groove, and the corresponding position on the lock shell connecting member is provided with a boss 213 that can extend into the groove 221 to prevent the thumbwheel from being pulled out. Since the lock shell is provided with an easy-to-break groove 212, the width of the easy-to-break groove 212 is relatively narrow, and the strength of the lock shell at this location is weaker than that of other places. When the lock shell is broken, the position of the break is likely to appear at the easy-to-break groove 212. The M5 threaded hole 215 on the lock shell 21 is hidden in the lock body and cannot be damaged, so the remaining lock core is still fixed in the lock body and cannot be pulled out; at the same time, after the lock shell is broken at the easy-to-break groove 212, the groove 221 of the thumbwheel is also stuck on the boss 213 of the lock shell, and the thumbwheel is in the lock body, so the thumbwheel 22 cannot be pulled out, which improves the safety of unlocking. When the thumbwheel cannot be rotated, because the thumbwheel head 222 of the thumbwheel is at a certain angle (usually 30 degrees) with the lock cylinder, the thumbwheel head 222 will also prevent the thumbwheel 22 from being pulled out, further improving safety.

[0036] Part of the external transmission component main shaft 32 is arranged in the external transmission component matrix 33, and the external transmission component matrix 33 is sleeved in the external lock core 31. The external transmission component matrix 33 is linked with the external lock core 31 through the external transmission component blocking pin. The external transmission component main shaft 32 also passes through the anti-pull dial wheel 22 and is sleeved with an internal transmission component 41. The internal transmission component 41 is also in the anti-pull dial wheel 22. The main shaft 32 passes through the internal transmission component 41 to the anti-rotation core 43 and the dial wheel core 42.

[0037] In order to prevent thieves from entering through the center hole of the thumbwheel, the present invention is further designed with an annular inner blocking block 24, which is arranged on one side of the inner transmission member 41 (close to the inner side of the door) and sleeved on the main shaft 32. A gap for the inner blocking block 24 is reserved in the thumbwheel core 42, and there is a distance below the gap from the inner blocking block 24 to provide space for the inner blocking block 24 to fall after the outer lock core assembly falls off. When the lock shell is broken at the breakable groove 212, the outer lock core 31, the outer transmission component spindle 32, the outer transmission component matrix 33, the outer transmission component spring 34 and the outer transmission component blocking pin all fall off. Since there is a gap under the inner blocking block 24, the height of the gap is about one quarter to one half of the height of the blocking block itself. At this time, the inner blocking block 24 will fall down and block the inner transmission component 41 from moving inward; at the same time, the inner blocking block 24 also blocks thieves from entering through the center hole of the dial wheel with needles, wires, and drills, preventing the anti-rotation core 43 from pushing inward, thereby improving the anti-theft safety effect.

[0038] The inner lock core group mainly includes a thumbwheel core 42, an anti-rotation core 43 and an unlocking core 45. The first end of the thumbwheel core 42 is sleeved with the inner transmission member 41 and the inner blocking block 24. The second end of the thumbwheel core 42 has a hollow groove that is roughly in the shape of a strip, so as to cooperate with the roughly strip-shaped protrusion 433 at the first end of the anti-rotation core 43 to achieve connection. The second end of the anti-rotation core 43 is a circular groove. The first end of the unlocking core 45 is columnar and can be inserted into the circular groove at the second end of the anti-rotation core 43. The two are linked by the unlocking pin 51 and rotate together with the thumbwheel core 42. Among them, a recessed structure 451 is provided on the columnar body of the first end of the unlocking core 45, and one side of the recessed structure 451 is two-section annular cams protruding from the surface of the columnar body. The unlocking pin 51 is fixed in the anti-rotation core 43 and extends into the recessed structure 451. During the process of opening and closing the lock, its moving trajectory is limited to the range of the recessed structure 451. In this way, the anti-rotation core 43 can move back and forth and then disengage from the No. 1 latch 27. The horizontal width of the recessed structure should be greater than the width of the slot 431 to ensure that the No. 1 latch 27 can be moved out of the slot 431.

[0039] The side surface of the first end of the anti-rotation core 43 has a slot 431, and the first bayonet 27 is inserted into the slot 431 of the anti-rotation core 43. When the knob 46 in the door rotates, the unlocking core 45 is driven to rotate, and the anti-rotation core 43 is driven to move in parallel inside and outside. After the anti-rotation core 43 moves inward for a certain distance, it is no longer stuck in the slot 431 of the anti-rotation core 43, so that the anti-rotation core 43 can rotate freely, and then drive the dial core 42 to rotate. The rotation of the dial core 42 can drive the anti-pull dial 22 to rotate, so as to open the lock body. The second bayonet 28 is stuck between the two sections of the annular cam, and is used to fix the knob 46 and the unlocking core 45. In addition, during the unlocking process, the No. 1 latch 27 will disengage from the slot 431 of the anti-rotation core 43. An inner core spring 44 is provided in the unlocking core 45. During the unlocking process, the inner core spring 44 is in a compressed state. When the lock shell 21 is broken, the inner core spring 44 pushes the anti-rotation core 43 to reset under the action of elastic force, so that the No. 1 latch 27 enters the slot 431 of the anti-rotation core 43, so that the anti-rotation core 43 cannot rotate and the door cannot be unlocked from the outside, thereby realizing the self-locking function.

[0040] Reference Figures 5 to 8 As shown, Figure 5 This is a schematic diagram of the door being locked in its initial state. Figure 6 This is a schematic diagram of unlocking the door from the outside. Figure 6 It can be seen that when unlocking the door from the outside, the first latch 27 moves out of the latch groove 431, and when the lock shell is broken at the breakable groove 212, the lock body 210 is unlocked. Figure 7 As shown, the inner blocking block 24 falls, and the No. 1 latch 27 is also reset and continues to be stuck in the latch slot 431, so that the door cannot be unlocked from the outside, but the door can be unlocked from the inside. Figure 8 As shown, by rotating the knob 46, the unlocking core 45 moves inward through the unlocking pin 51 until the locking groove 431 of the anti-rotation core is disengaged from the No. 1 locking pin 27, so that the anti-rotation core can rotate unimpeded to achieve unlocking inside the door.

[0041] Another embodiment of the present invention further provides a safety lock, which includes the lock core in the aforementioned embodiment, and also includes accessories such as a lock tongue, a pin, a key, etc. that cooperate with the lock core, which will not be described in detail here.

[0042] A lock core and a safety lock disclosed in the embodiments of the present invention have good anti-dialing performance and high safety.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A safety lock core, comprising an outer lock core assembly, an inner lock core assembly, a lock housing and an anti-pull pull wheel, characterized in that: The lock housing is provided with a wide groove for accommodating the anti-pull pull wheel, and an elongated easy-to-break groove is also provided on the end surface of the wide groove close to the side of the outer lock core assembly. The outer ring of the anti-pull pull wheel is provided with a groove, and the lock housing is provided with a boss extending into the groove to limit the anti-pull pull wheel from being pulled out; The outer lock core group includes a main shaft, and the inner lock core group includes a thumbwheel core, an anti-rotation core and an unlocking core. The main shaft of the outer lock core group extends into the inner lock core group, and an inner transmission member and an inner blocking block are sleeved on the main shaft. A gap for accommodating the inner blocking block is reserved in the thumbwheel core, and a gap is provided below the gap from the inner blocking block to provide a space for the inner blocking block to fall after the outer lock core group falls off, and the inner blocking block is annular. The first end of the anti-rotation core has a slot, the first end of the anti-rotation core is inserted into the inside of the thumbwheel core for connection, the first end of the unlocking core is inserted into the second end of the anti-rotation core and linked through the unlocking pin, the unlocking core has a recessed structure, the horizontal width of the recessed structure should be greater than the width of the slot, and one side of the recessed structure is an annular cam; When the door is not unlocked, the No. 1 bayonet is stuck in the slot of the anti-rotation core. When the knob in the door is rotated, the unlocking core rotates, driving the anti-rotation core to move parallel inside and outside. After the anti-rotation core moves inward for a certain distance, the No. 1 bayonet is no longer stuck in the slot of the anti-rotation core, allowing the anti-rotation core to rotate freely, thereby driving the dial core to rotate.

2. The safety lock cylinder according to claim 1, characterized in that: The width of the wide groove is 16-28 mm.

3. The safety lock cylinder according to claim 1, characterized in that: The external lock core group also includes an external lock core, an external transmission member mother body, and an external transmission member mother body spring. The external transmission member main shaft is arranged in the external transmission member mother body. The external transmission member mother body is sleeved inside the external lock core. The external transmission member mother body is linked with the external lock core through the external transmission member blocking pin.

4. The safety lock cylinder according to claim 1, characterized in that: The unlocking pin shaft extends into the recessed structure and moves along the inner wall surface of the recessed structure.

5. The safety lock cylinder according to claim 3, characterized in that: The anti-pull pull wheel is hollow inside, the first end of the anti-pull pull wheel is fixedly connected to the outer lock core, and the pull wheel core, the inner transmission part and the inner blocking block are all located inside the anti-pull pull wheel.

6. The safety lock cylinder according to claim 1, characterized in that: There is a height difference between the bottom of the breakable groove and the bottom surface of the anti-pulling wheel overlapped on the wide groove.

7. A safety lock, characterized in that: The safety lock has a safety lock core as described in any one of claims 1 to 6 above.

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