Lock cylinder mechanism incapable of being opened after violent damage

Abstract

The utility model relates to a lock cylinder mechanism incapable of being opened after violent damage, which comprises a lock cylinder body and a dial wheel, an outdoor lock liner hole cavity and an indoor lock liner hole cavity are arranged in the lock cylinder body, an outdoor lock liner is arranged in the outdoor lock liner hole cavity, the dial wheel is arranged in the middle of the lock cylinder body, and the dial wheel is in transmission connection with the outdoor lock liner through a linkage shaft; the anti-theft lock cylinder is characterized in that the linkage shaft is arranged in the lock cylinder body and can move axially, the linkage shaft is provided with a first end and a second end and is jacked by the first spring, and in a normal state, the outdoor lock cylinder blocks axial outward movement of the linkage shaft; a radial mounting hole is formed in the shifting wheel, a stop pin capable of moving towards the axis is arranged in the mounting hole, the stop pin is jacked by a second spring, and in a normal state, the linkage shaft blocks the stop pin from moving towards the axis; and when the lock cylinder body is in a damaged state, the linkage shaft moves outwards under the action of the first spring to relieve blocking of the stop pin. The utility model has the advantages that the structure is simpler and more reasonable, the processing difficulty is lower, and the assembly is more convenient.

Description

Technical Field

[0001] The utility model relates to a lock core, in particular to a lock core mechanism which cannot be opened after being violently damaged. Background Art

[0002] The existing lock core generally includes a lock core body, a lock dial wheel is set in the middle of the lock core body, and two lock cores are set at both ends. The outdoor lock core is driven by the key to drive the dial wheel to rotate to open the door lock. There are usually two types of indoor lock cores, one is to drive the dial wheel by inserting the key, and the other is to drive the dial wheel by connecting a knob. When the outdoor lock core is violently disassembled, the dial wheel of the general lock core will be exposed to the outside, and then the criminals can open the door lock by rotating the exposed dial wheel. Therefore, from a certain perspective, its anti-theft effect is not very perfect.

[0003] In response to the above-mentioned situation, a Chinese invention patent with patent number ZL201410451258.3 (publication number CN104196333B) entitled "A lock core mechanism that can resist violent destruction" discloses such a lock core mechanism, including left and right lock core bodies, in which left and right lock core shafts are respectively inserted relative to each other, an unlocking dial wheel is arranged between the left and right lock core bodies, the unlocking dial wheel and the left and right lock core shafts are respectively connected and transmitted by left and right transmission blocks, a dial wheel convex connection is formed on one side of the left and right transmission blocks, and a lock core convex connection is formed on the other side, a balancing spring is arranged between the left lock core shaft and the left transmission block, and between the right lock core shaft and the right transmission block, a pushing spring is arranged between the left and right transmission blocks, a sheath is arranged in the left cavity of the unlocking dial wheel, the dial wheel convex connection of the left transmission block passes through the opening on the sheath and is opposite to the dial wheel convex connection of the right transmission block, the dial wheel convex connection of the left transmission block is composed of a fixed part and a movable part, and the movable part is hinged on the left transmission block. Through the above design, when the outer side, i.e. the left side of the lock core body, is violently damaged, the left transmission block is pushed out under the action of the balance spring and the push spring, and the movable part loses the limit of the sleeve and automatically hinges under the action of gravity, axially clamping the sleeve, and the thumbwheel convex connection of the left transmission block cannot be pushed back into the unlocking thumbwheel, and the unlocking thumbwheel cannot rotate, thereby achieving the purpose of preventing opening from violent damage.

[0004] The thumbwheel convex joint in the aforementioned patent is composed of a fixed part and a movable part, and the movable part is hinged on the left transmission block. The fixed part and the movable part are small in structure, and it is very inconvenient to hinge and install them on the left transmission block with a small space. In addition, the lock core body is composed of the left lock core body, the right lock core body and the fixed block, and the coaxiality is difficult to ensure. If the coaxiality is not high, it will be stuck and not smooth during use, so the processing cost is very high. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a lock core mechanism which cannot be opened after violent damage, which has a simpler and more reasonable structure, lower processing difficulty and more convenient assembly, in response to the above-mentioned existing technical status. When encountering violent damage, it can actively limit the rotation and opening of the unlocking dial wheel, thereby enhancing the anti-theft performance.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a lock core mechanism that cannot be opened after violent destruction, including a lock core body and a thumbwheel, the lock core body is provided with a coaxial outdoor lock core cavity and an indoor lock core cavity, the outdoor lock core cavity is provided with an outdoor lock core that can be driven to rotate by a key, the thumbwheel is arranged in the middle of the lock core body, is coaxial with the lock core cavity on the lock core body, and the thumbwheel and the outdoor lock core are connected by a linkage shaft; the characteristic is that the linkage shaft is arranged in the lock core body and can move axially, the linkage shaft has a first end extending into the outdoor lock core and being transmission-connected thereto, and a second end for inserting into the driving hole of the thumbwheel, The linkage shaft is supported by a first spring to maintain a tendency to move outward from the thumbwheel, and under normal circumstances, the outdoor lock core forms an obstacle to the axial outward movement of the linkage shaft; a radial mounting hole is provided in the thumbwheel, and a stop pin that can move toward the axis center is provided in the mounting hole, and the stop pin is supported by a second spring to maintain a tendency to move toward the axis center, and under normal circumstances, the linkage shaft forms an obstacle to the movement of the stop pin toward the axis center; when the lock core body is destroyed, the linkage shaft moves outward under the action of the first spring to release the obstacle to the stop pin, and the stop pin moves toward the axis center under the action of the second spring to block the axial inward movement of the linkage shaft, thereby preventing the linkage shaft from being inserted into the driving hole of the thumbwheel.

[0007] As an improvement, a coupling sleeve is installed in the lock core body, the linkage shaft is installed in the coupling sleeve and can move axially, and the first end of the linkage shaft passes through the top wall of the coupling sleeve and is inserted into the outdoor lock core. The arrangement of the coupling sleeve provides coaxial positioning for the linkage shaft and blocks the outward movement of the linkage shaft. The coupling sleeve can be partially inserted into the thumbwheel to form a coaxial support for the thumbwheel. When assembled, it is installed from the outdoor lock core hole of the lock core body, so that the coupling sleeve can be arranged at the end of the outdoor lock core.

[0008] As an improvement, a stop step is provided on the outer circumference of the linkage shaft. Under normal conditions, the outer circumference of the linkage shaft blocks the stop pin. When the lock core is damaged, the stop pin moves toward the axis and rests on the stop step to block the linkage shaft. The stop step can better cooperate with the stop pin to prevent the stop pin from being excessively pushed out of the mounting hole on the dial wheel by the second spring.

[0009] As a further improvement, the lock core body is provided with an indoor drive shaft, the indoor drive shaft is provided in the lock body and can move axially, the indoor drive shaft has an insertion portion, the indoor drive shaft is supported by a third spring to maintain an axial forward movement trend, the indoor drive shaft in the forward movement state has its insertion portion inserted into the dial wheel driving hole, the insertion of the insertion portion into the dial wheel driving hole can make the rotation of the indoor drive shaft drive the dial wheel to rotate, and the axial inward movement of the linkage shaft can push the indoor drive shaft away from the driving hole. The provision of the indoor drive shaft can enable the lock core mechanism to drive the dial wheel to rotate in both the inside and outside (indoor and outdoor) directions.

[0010] Alternatively, the indoor lock core hole of the lock core body is provided with an indoor lock core, the indoor drive shaft is constrained in the indoor lock core and can move axially, the indoor drive shaft is driven by the indoor lock core, and the indoor lock core can be driven to rotate by a key or by an external knob.

[0011] In order to prevent the key head from being inserted obliquely into the indoor lock cylinder and causing adverse effects on the third spring, a spring seat is provided in the indoor lock cylinder, and the third spring is supported between the spring seat and the indoor drive shaft.

[0012] In order to improve safety, the lock body is provided with an easy-to-break groove, which is located at the end of the outdoor lock core. The easy-to-break groove can make the lock core break at the desired position when it encounters violent damage, protecting the unwanted position from being easily damaged.

[0013] Compared with the prior art, the advantages of the utility model are: through the design and mutual cooperation of the linkage shaft, the stop pin and the second spring, when the lock core body on the outdoor side is violently damaged, the linkage shaft is no longer held by the outdoor lock core, and the linkage shaft moves axially outward under the action of the first spring to release the obstruction of the stop pin, and the stop pin moves toward the axis center under the action of the second spring to form an obstruction to the axial inward movement of the linkage shaft, so as to prevent the linkage shaft from being inserted into the driving hole of the dial wheel. Even if the lawless elements pinch the first end of the linkage shaft with a tool to rotate it, because the second end of the linkage shaft is in a separated state from the driving hole of the dial wheel, the rotation of the linkage shaft can only be meaningless idling, and cannot drive the dial wheel to rotate, thereby achieving the purpose of preventing the door from being opened after violent damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model (normally no key is inserted);

[0015] Figure 2 It is a cross-sectional view of an embodiment of the utility model (normal state without key inserted);

[0016] Figure 3 for Figure 2 A magnified image of point A;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model (key is normally inserted);

[0018] Figure 5 It is a cross-sectional view of an embodiment of the utility model (key is normally inserted);

[0019] Figure 6 for Figure 5 A magnified view of point B;

[0020] Figure 7 This is a three-dimensional structural diagram of an embodiment of the utility model (the lock core body on the outdoor side is destroyed);

[0021] Figure 8 It is a cross-sectional view of an embodiment of the utility model (the lock core body on the outdoor side is destroyed);

[0022] Fig. 9 The three-dimensional decomposition of the embodiment of the utility model Figure 1 ;

[0023] Fig.10 The three-dimensional decomposition of the embodiment of the utility model Figure 2 . DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 10 Shown is a preferred embodiment of the utility model.

[0026] A lock core mechanism that cannot be opened after violent damage includes a lock core body 1 and a thumbwheel 2. The lock core body 1 has an outdoor lock core cavity 1a and an indoor lock core cavity 1b that are spaced apart from each other on the left and right. A slot 1c for installing the thumbwheel 2 is formed between the outdoor lock core cavity 1a and the indoor lock core cavity 1b. An outdoor lock core 3a that can be driven to rotate by inserting a key 4 is provided in the outdoor lock core cavity 1a of the lock core body 1. The thumbwheel 2 is rotatably installed on the lock core body 1. The thumbwheel 2 and the outdoor lock core 3a are connected through a linkage shaft 5.

[0027] The linkage shaft 5 is arranged in the lock core body 1 and can move axially. The linkage shaft 5 has a first end 51 extending into the outdoor lock core 3a and drivingly connected thereto, and a second end 52 for inserting into the driving hole 21 of the dial wheel 2. The linkage shaft 5 is supported by a first spring 6a to maintain an axial outward movement trend; a radial mounting hole 2a is provided in the dial wheel 2, and a stop pin 6 that can move toward the axis center is installed in the mounting hole 2a. The stop pin 6 is supported by a second spring 6b to maintain a trend of moving toward the axis center. Under normal circumstances, the linkage shaft 5 forms a barrier to the movement of the stop pin 6 toward the axis center; when the lock core body 1 is destroyed, the linkage shaft 5 moves axially outward under the action of the first spring 6a to release the barrier to the stop pin 6, and the stop pin 6 moves toward the axis center under the action of the second spring 6b, forming a barrier to the axial inward movement of the linkage shaft 5 to prevent the linkage shaft 5 from being inserted into the driving hole 2b of the dial wheel 2.

[0028] Specifically, a coupling sleeve 7 is installed in the lock core body 1, and the linkage shaft 5 is installed in the coupling sleeve 7 and can move axially. The first end 51 of the linkage shaft 5 passes through the top wall of the coupling sleeve 7 and is inserted into the outdoor lock core 3a. A stop step 53 is provided on the outer circumference of the linkage shaft 5. Under normal conditions, the outer circumference of the linkage shaft 5 blocks the stop pin 6; when the lock core body 1 is damaged, the stop pin 6 moves toward the axis and rests on the stop step 53, thereby blocking the axial inward movement of the linkage shaft 5.

[0029] A drive shaft 8 is provided in the lock core body 1. The drive shaft 8 is provided in the lock core body 1 and can move axially. The drive shaft 8 has an insertion portion 81. The drive shaft 8 is supported by a third spring 6c to maintain an axial inward movement trend. The drive shaft 8 in the inward movement state has its insertion portion 81 inserted into the driving hole 21 of the dial wheel 2. The insertion of the insertion portion 81 into the driving hole can enable the rotation of the drive shaft 8 to drive the dial wheel 2 to rotate. The axial inward movement of the linkage shaft 5 can push the insertion portion 81 of the drive shaft 8 away from the driving hole 21.

[0030] An indoor cylinder 3b is provided in the indoor cylinder cavity 1b of the lock core body 1 and can be driven to rotate by inserting a key 4. The outdoor cylinder 3a and the indoor cylinder 3b are arranged in a front-to-back spacing, and the thumbwheel 2 is arranged between the outdoor cylinder 3a and the indoor cylinder 3b. The drive shaft 8 is constrained in the indoor cylinder 3b and can move axially, and the rotation of the indoor cylinder 3b can drive the drive shaft 8 to rotate.

[0031] A spring seat 9 is provided in the indoor lock core 3b, and the third spring 6c is supported between the spring seat 9 and the drive shaft 8.

[0032] The lock core body 1 is provided with an easy-to-break groove 1d, and the position of the easy-to-break groove 1d is at the end position of the outdoor lock core 3a.

[0033] like Figure 7 , 8As shown, the lock core body 1 on the outdoor side (at the outdoor lock core 3a) is violently damaged, and the linkage shaft 5 is no longer held by the outdoor lock core 3a. The linkage shaft 3a moves axially outward under the action of the first spring 6a to release the obstruction to the stop pin 6. The stop pin 6 moves downward under the action of the second spring 6b to form an obstruction to the axial inward movement of the linkage shaft 5, so as to prevent the second end 52 of the linkage shaft 5 from being inserted into the driving hole 21 of the dial wheel 2. Even if the criminals use a tool to pinch the first end 51 of the linkage shaft 5 for rotation, because the second end 52 of the linkage shaft 5 is in a separated state from the driving hole 21 of the dial wheel 2, the rotation of the linkage shaft 5 can only be meaningless idling, and cannot drive the dial wheel 2 to rotate, thereby achieving the purpose of preventing the door from being opened after violent damage.

[0034] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "upper, lower" and the like indicating directions or positional relationships are all based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A lock core mechanism that cannot be opened after violent destruction, comprising a lock core body (1) and a thumbwheel (2), wherein the lock core body (1) is provided with a coaxial outdoor lock core cavity (1a) and an indoor lock core cavity (1b), wherein the outdoor lock core cavity (1a) is provided with an outdoor lock core (3a) that can be driven to rotate by a key (4) inserted therein, wherein the thumbwheel (2) is arranged in the middle of the lock core body (1) and is coaxial with the outdoor lock core cavity (1a) on the lock core body, wherein the thumbwheel (2) and the outdoor lock core (3a) are connected in transmission via a linkage shaft (5); and characterized in that: The linkage shaft (5) is arranged in the lock core body (1) and can move axially. The linkage shaft (5) comprises a first end (51) extending into the outdoor lock core (3a) and being transmission-connected thereto, and a second end (52) for inserting into the driving hole (21) of the dial wheel (2). The linkage shaft (5) is supported by a first spring (6a) to maintain an axial outward movement tendency. Under normal conditions, the outdoor lock core (3a) forms an obstacle to the axial outward movement of the linkage shaft (5); a radial mounting hole (2a) is provided in the dial wheel (2), and a stop pin (6) that can move toward the axis is provided in the radial mounting hole (2a), and the stop pin (6) is supported by a second spring (6b) to maintain the tendency to move toward the axis. Under normal conditions, the linkage shaft (5) forms an obstacle to the axial movement of the stop pin (6); when the lock core body (1) is in a damaged state, the linkage shaft (5) moves axially outward under the action of the first spring (6a) to release the obstacle to the stop pin (6), and the stop pin (6) moves toward the axis under the action of the second spring (6b) to form an obstacle to the axial inward movement of the linkage shaft (5), so as to prevent the linkage shaft (5) from being inserted into the driving hole (21) of the dial wheel (2).

2. The lock core mechanism that cannot be opened after violent destruction according to claim 1, characterized in that: A coupling sleeve (7) is installed in the lock core body (1), the linkage shaft (5) is installed in the coupling sleeve (7) and can move axially, and the first end (51) of the linkage shaft (5) passes through the top wall of the coupling sleeve (7) and is inserted into the outdoor lock core (3a).

3. The lock core mechanism that cannot be opened after violent destruction according to claim 1 is characterized in that: The outer circumference of the linkage shaft (5) is provided with a stop step (53). Under normal conditions, the outer circumference of the linkage shaft (5) blocks the stop pin (6). When the lock core body (1) is in a damaged state, the stop pin (6) moves toward the axis and rests on the stop step (53) to block the axial inward movement of the linkage shaft (5).

Images