Lock cylinder and lock

Abstract

The utility model discloses a lock cylinder, which belongs to the field of door locks, solves the problem that the existing door lock is unlocked due to lower anti-theft performance, and adopts the technical scheme that the lock cylinder mainly comprises a shell, a cylinder body, marbles and a locking rod, a locking groove is formed in the inner wall of the shell, the cylinder body is rotationally arranged in an inner hole of the shell, and the marbles are arranged in the locking rod. The pin tumbler is parallel to the radial surface of the core body and is arranged in the core body in a sliding mode, the locking rod extends in the axial direction of the core body and is arranged in the core body in a sliding mode in the radial direction of the core body, and the locking rod has the trend of keeping extending out of the core body to be matched with the locking groove; the unlocking grooves of all the marbles are aligned in the axial direction of the core body to form an unlocking groove for containing the locking bar, an illusion groove is formed in the side face, facing the marbles, of the locking bar, a limiting protrusion is arranged on the side, facing the locking bar, of the marbles, and after the limiting protrusion is inserted into the illusion groove, the locking bar cannot retreat from the locking groove. The anti-theft performance of the lock cylinder is further improved. The utility model further discloses a lock which comprises the lock cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to a lock core and a lock. Background Art

[0002] At present, the general pin lock has multiple groups of conical or cylindrical pins installed in the lock shell and the lock core. With this structure, the lock can be easily opened by thieves using technical unlocking tools such as elastic hooks. When opening the lock technically, first insert the plug of the technical unlocking tool into the keyhole in the lock core, press the technical unlocking tool tightly so that the pin grooves in the lock core and the pin grooves in the lock shell form a card platform, and the thief can use the elastic hook to push each pin up. When the pin is positioned on the card platform, twisting the technical unlocking tool can open the lock.

[0003] The prior art CN2937377Y discloses a double-layer safety lock, comprising a lock body, a lock core, a pin and a locking rod, wherein a locking groove is formed on the inner side of the circular hole of the lock body, a pin hole and a locking rod groove are formed on the lock core, the inner side of the locking rod groove is communicated with the side of the pin hole, a pin and a pin spring are provided in the pin hole, a locking rod is provided in the locking rod groove, a pin is provided on the pin, and a ball groove is provided on the locking rod, and a spring is provided on the locking rod to enable it to slide toward the inner side of the circular hole of the lock body. In the locked state, one end of the locking rod is close to the pin, and the other end is embedded in the locking groove inside the circular hole of the lock body. In the unlocked state, the locking rod slides away from the locking groove and is stuck in the ball groove. The pin is also provided with an anti-theft false groove. When the thief inserts a technical unlocking tool into the lock hole, the locking rod is stuck in the anti-theft false groove, creating an illusion that the lock has been unlocked, confusing the thief and increasing the difficulty of unlocking the lock during anti-theft.

[0004] When the door is unlocked, the locking rod is inserted into the marble or anti-theft false groove on the side facing the marble. It is possible that the marble grooves of all the marbles are not aligned, causing the side facing the marble to abut against the outer wall of the marble. When the locking rod abuts against the outer wall of the marble, the lock core cannot rotate, and the thief can pull out the technical unlocking tool and unlock it again. Only when the side facing the marble is abutted in the anti-theft false groove can the door lock be protected from theft. Therefore, the anti-theft performance of the door lock is relatively low. Utility Model Content

[0005] The purpose to be achieved by the utility model is to provide a lock core, improve the anti-theft performance of the lock core, and further reduce the possibility of the lock core being opened when a thief uses a technical unlocking tool.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a lock core, including a shell, a core, a pin and a locking rod, a locking groove is provided on the inner wall of the shell, the core is rotatably arranged in the inner hole of the shell, the pin is slidably arranged in the core parallel to the radial surface of the core, the locking rod extends along the axial direction of the core and is slidably arranged in the core along the radial direction of the core, the locking rod has a tendency to keep extending out of the core and cooperating with the locking groove, an unlocking groove is provided on the pin, the unlocking grooves of all the pins are aligned along the axial direction of the core to form an unlocking groove for accommodating the locking rod, an illusion groove is provided on the side surface of the locking rod facing the pin, and a limiting protrusion is provided on the side of the pin facing the locking rod, and after the limiting protrusion is inserted into the illusion groove, the locking rod cannot exit the locking groove.

[0007] After adopting the above technical scheme, the utility model has the following advantages: when the thief uses the technical unlocking tool to insert it into the keyhole and confirms that the technical unlocking tool is inserted, since the keyhole is in the middle part of the core body, after the technical unlocking tool enters the keyhole, it drives the pin to slide in the pin groove along the length direction of the pin groove. During the movement of the pin, since the distance moved by the technical unlocking tool is not the distance moved by the standard key, the limiting protrusion and the illusion groove are aligned in the radial direction of the core body, giving the thief the illusion that the locking rod is aligned with the unlocking groove. Subsequently, when the thief drives the core body to rotate through the technical unlocking tool, due to the limiting protrusion and the illusion groove The locking rod is aligned with the locking groove, and when the core body rotates, the illusion groove and the limiting protrusion are plugged into each other, so that there is a radial distance between the side of the locking rod facing the pin and the bottom wall of the unlocking groove in the radial direction of the core body, resulting in the end of the locking rod abutting the locking groove cannot be completely separated from the locking groove during the rotation of the core body, thereby preventing the lock core from being opened when using a technical unlocking tool, and through the plugging of the limiting protrusion and the illusion groove on the side of the locking rod facing the pin, a thief is given the illusion that the lock can be unlocked, and at the same time, it is more difficult for the thief to discover that the inability to unlock the lock is a problem with the technical unlocking tool and the unlocking technique, thereby increasing the difficulty of unlocking the lock by the thief using the technical unlocking tool and improving the anti-theft performance of the lock core.

[0008] Furthermore, there are a plurality of pins distributed along the length direction of the locking rod, and any limiting protrusion is inserted into the illusion groove so that the locking rod cannot exit the locking groove.

[0009] By adopting the above-mentioned technical solution, when the limiting protrusion on any one of the multiple pins is directly opposite to the illusion groove, the locking rod cannot drive the locking rod to slide out of the locking groove completely when the core body rotates, thereby increasing the difficulty of the lock core being opened by a technical unlocking tool. At the same time, through the installation of multiple pins, the possibility of the limiting protrusion being aligned with the illusion groove is increased, increasing the difficulty of aligning the unlocking grooves on all the pins along the axial direction of the core body to form an unlocking groove.

[0010] Furthermore, the core body has a key hole, and two groups of pins are symmetrically distributed about the key hole, and the two groups of pins correspond to two locking rods.

[0011] By adopting the above-mentioned technical solution, with respect to the two groups of pins symmetrically distributed on the key hole, the number of pins is increased, and the side of the two locking rods facing the pins must abut against the unlocking groove of the pins on the corresponding side. When any limiting protrusion is aligned with the illusion groove, the illusion groove and the limiting protrusion are plugged into each other, so that the locking rod cannot slide out of the locking groove completely, further increasing the difficulty of unlocking when using technical unlocking tools.

[0012] Furthermore, the plurality of limiting protrusions are distributed on both sides of the locking rod.

[0013] By adopting the above-mentioned technical solution, each pin is provided with a limiting protrusion, and multiple limiting protrusions are distributed on both sides of the locking rod. When unlocking, the pins move to both sides of the locking rod, so that when unlocking, the movement directions of all the pins are not exactly the same, further increasing the irregularity of the direction and distance of the pins moving when unlocking, thereby increasing the difficulty of unlocking the lock core using technical unlocking tools.

[0014] Furthermore, there are a plurality of illusion grooves distributed along the length direction of the locking rod, and the plurality of illusion grooves correspond one-to-one to a plurality of pins distributed along the length direction of the locking rod; or, the illusion groove is arranged to penetrate along the length direction of the locking rod.

[0015] By adopting the above-mentioned technical solution, multiple pins correspond to multiple illusion grooves one by one. When one illusion groove is plugged into the limiting protrusion, the locking rod cannot be completely separated from the locking groove, thereby achieving an anti-theft effect. Alternatively, the illusion groove directly penetrates the locking rod in the length direction of the locking rod, which facilitates the processing of the locking groove, thereby reducing the processing cost of the locking rod.

[0016] Furthermore, the limiting protrusion is protrudingly arranged on the side of the pin facing the locking rod, and when the groove wall of the illusion groove abuts against the side of the limiting protrusion facing the locking rod, the locking rod cannot exit the locking groove.

[0017] By adopting the above-mentioned technical solution, when the limiting protrusion is plugged into the illusion groove, when the side of the limiting protrusion facing the locking rod abuts against the illusion groove, there is a gap between the side of the locking rod facing the pin and the unlocking groove, resulting in the distance between the side of the locking rod facing the pin and the inner wall of the lock body being smaller than the width of the locking rod itself, resulting in the locking rod abutting against the side of the locking groove and being unable to completely slide out of the locking groove, thereby increasing the difficulty of unlocking the lock core using technical unlocking tools.

[0018] Furthermore, a contact arc surface is provided on a side of the locking rod away from the pin, the contact arc surface abuts against the groove wall of the locking groove, and the contact arc surface slides away from the locking groove along the groove wall of the locking groove during the rotation of the core body.

[0019] By adopting the above-mentioned technical solution, the contact arc surface abuts against the groove wall of the locking groove. When the locking rod is inserted into the unlocking groove, the core body drives the locking rod to rotate, and the contact arc surface and the groove wall of the locking groove slide relative to each other. By setting the contact arc surface, the difficulty of the locking rod sliding out of the groove wall of the locking groove due to the existence of edges and corners is reduced, thereby facilitating the locking rod to disengage from the locking groove when unlocking.

[0020] Furthermore, connecting blocks are protruding from both ends of the locking rod, and a second elastic member is provided between the connecting block and the core body. The elastic force of the second elastic member enables the locking rod to maintain a tendency to extend out of the core body and cooperate with the locking groove.

[0021] By adopting the above-mentioned technical solution, when the locking rod is aligned with the locking groove, the second elastic member pushes the locking rod and pushes the locking rod into the locking groove. When unlocking, the locking rod abuts against one side of the locking groove and slides along the groove wall of the locking groove. During the sliding process, the locking rod squeezes the second elastic member. When locking the door, the second elastic member abuts against the connecting block, so that the side of the locking rod away from the pin abuts against the locking groove, which facilitates the lock cylinder to lock the door.

[0022] Furthermore, a fake anti-theft groove with a depth less than the unlocking groove is provided on the side of the pin facing the locking rod, and a limiting protrusion is located between the fake anti-theft groove and the unlocking groove. After the limiting protrusion is inserted into the illusion groove, the locking rod abuts against the bottom surface of the fake anti-theft groove, so that the locking rod cannot withdraw from the locking groove; and / or, a raised rib is provided on the side of the pin facing away from the locking rod, and during the key insertion process, the raised rib drives the pin to slide along the tooth groove on the key so that the unlocking groove is aligned with the locking rod.

[0023] By adopting the above-mentioned technical scheme, the limiting protrusion abuts against the bottom surface of the illusion groove, resulting in a gap between the side of the locking rod facing the pin and the bottom wall of the unlocking groove, further causing the distance between the side of the locking rod facing the pin and the inner hole wall of the lock body to be less than the width of the locking rod, so that the locking rod cannot completely disengage from the locking groove when the core body rotates, thereby increasing the difficulty of unlocking with the technical unlocking tool; after the key is inserted into the keyhole, the end of the raised rib away from the pin slides along the tooth groove on the key along the length direction of the pin groove on the core body during the key insertion process, thereby driving the pin to slide in the pin groove, so that the unlocking grooves of all the pins are aligned in the axial direction of the core body to form an unlocking groove, and after the key is inserted, the unlocking groove is aligned with the locking rod. After the key drives the core body to rotate, the locking rod slides along the groove wall of the locking groove and slides toward the pin, and then the locking rod is inserted into the unlocking groove to unlock.

[0024] The utility model also provides a lock, comprising a lock core, wherein the lock core adopts a lock core described in any one of the above technical solutions.

[0025] By adopting the above-mentioned technical solution, the lock core is applied to the lock, thereby increasing the difficulty of unlocking the lock when the thief uses technical unlocking tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the overall installation of a lock core of the utility model;

[0028] Figure 2 It is an axial cross-sectional view of the overall structure of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the core body of the utility model;

[0030] Figure 4 It is a radial cross-sectional view of the overall structure of the utility model;

[0031] Figure 5 For the utility model Figure 4 Enlarged view of point A in the middle;

[0032] Figure 6 This is a schematic diagram of the plugging of the limiting protrusion and the illusion groove in the utility model;

[0033] Figure 7 It is a schematic diagram of the distribution of multiple marbles in the utility model;

[0034] Figure 8 It is a schematic diagram of the distribution of two groups of pins and two locking rods in the utility model;

[0035] Fig. 9 It is a schematic diagram of the distribution of multiple illusion grooves on the locking rod of the utility model;

[0036] Fig.10 It is a schematic diagram of an illusion groove penetrating through the locking rod in the utility model;

[0037] Fig.11 The utility model is a schematic diagram of the distribution of the anti-theft false groove and the raised ribs on the bullet. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0039] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present utility model, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0040] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0041] like Figures 1 to 4 As shown, the utility model provides a lock core, including a shell 1, a core 2, a pin 3 and a locking rod 4. A locking groove 11 is provided on the inner wall of the shell 1, and the core 2 is rotatably arranged in the shell 1. A pin groove 22 parallel to the radial surface of the core 2 is opened on the core 2, wherein the radial surface of the pin 3 is the cross-section where the radius of the pin 3 is located, and the pin 3 is slidably installed in the pin groove 22. A locking rod groove 23 extending along the length direction of the core 2 is also provided on the core 2. The locking rod 4 extends along the length direction of the core 2 and is slidably installed in the locking rod groove 23 along the radial direction of the core 2. When the lock core locks the door, the locking rod 4 extends out of the core 2 and abuts against the groove wall of the locking groove 11, thereby locking the door.

[0042] like Figure 5 As shown, the locking rod groove 23 is connected with the pin groove 22 on the core body 2, the pin 3 is provided with an unlocking groove 31, and the core body 2 is provided with a key hole 21. After the standard unlocking key is inserted into the key hole 21, the unlocking grooves 31 on all the pins 3 are aligned along the axial direction of the core body 2 to form an unlocking groove. The key is turned to drive the core body 2 to rotate. During the rotation of the core body 2, the side of the locking rod 4 away from the pin 3 slides along the groove wall of the locking groove 11 and approaches the pin 3 in the locking rod groove 23. The locking rod 4 is completely inserted into the unlocking groove 31 on the side facing the pin 3, so that the locking rod 4 is completely separated from the locking groove 11 when the core body 2 is rotated, thereby unlocking.

[0043] In this embodiment, if Figure 6 As shown, in order to increase the difficulty of unlocking the locking rod 4 when using a technical unlocking tool, an illusion groove 41 is provided on the side surface of the locking rod 4 facing the pin 3, and a limiting protrusion 32 is provided on the side surface of the pin 3 facing the locking rod groove 23. When using a technical unlocking tool to unlock, the limiting protrusion 32 is plugged into the illusion groove 41, and when the core 2 is rotated, the locking rod 4 slides toward the pin 3 for a certain distance and then abuts against a side surface of the pin 3, causing the locking rod 4 to be unable to completely disengage from the locking groove 11, thereby increasing the difficulty of unlocking when using a technical unlocking tool.

[0044] Considering that the technical unlocking tool is inserted into the key hole 21, it is difficult to judge the sliding distance of the pin 3 driven by the technical unlocking tool. It is possible that the locking rod 4 may abut against the pin 3 on the side facing the pin 3. At this time, when the limiting protrusion 32 is located between the locking rod 4 and the unlocking groove 31, the technical unlocking tool drives the core body 2 to rotate and still cannot drive the locking rod 4 to completely disengage from the locking groove 11 to unlock, further increasing the difficulty of unlocking when using the technical unlocking tool.

[0045] In another embodiment, if Figures 5 to 7 As shown, in order to increase the difficulty of unlocking when using a technical unlocking tool, a plurality of pins 3 are provided along the length direction of the core body 2, and each pin 3 has an unlocking groove 31 and a limiting protrusion 32. When any limiting protrusion 32 is plugged into the illusion groove 41, the rotation of the core body 2 cannot drive the locking rod 4 to completely withdraw from the locking groove 11, thereby increasing the difficulty of unlocking when using a technical unlocking tool.

[0046] In another embodiment, if Figure 7 As shown, the limiting protrusions 32 on the multiple pins 3 are distributed on both sides of the corresponding locking rod 4 along the radial surface of the core body 2. When the standard key is not used to unlock the door and the pins 3 and the locking rod 4 are distributed in the horizontal direction, it cannot be confirmed that the technical unlocking tool will drive the pins 3 to move toward the upper or lower side of the locking rod 4, thereby increasing the difficulty of aligning the unlocking grooves 31 of all the pins 3 along the axial direction of the core body 2 to form unlocking grooves, thereby increasing the difficulty of unlocking the door when using the technical unlocking tool.

[0047] In another embodiment, Figure 8 As shown, in order to increase the difficulty of unlocking the lock when using a technical unlocking tool, there are two groups of pins 3 symmetrically distributed about the key hole 21. The two groups of pins 3 correspond to two locking rods 4 and each group of pins 3 includes multiple pins. In the two groups of pins 3, after the limiting protrusion 32 on any one of the pins 3 is plugged into the illusion groove 41, the rotation of the core 2 cannot drive the locking rod 4 to completely withdraw from the locking groove 11, thereby increasing the difficulty of unlocking the lock when using a technical unlocking tool.

[0048] In another embodiment, if Figures 5 to 7As shown, in order to facilitate the resetting of the pin 3, a first elastic member 5 is installed between the pin 3 and the core body 2. Specifically, the first elastic member 5 includes a first resetting spring, one end of which is installed on the inner bottom wall of the pin groove 22, and the other end is installed on the pin 3, and the first resetting spring and the pin 3 are distributed along the length direction of the pin groove 22. After the standard key or other technical unlocking tool is separated from the key hole 21, the first resetting spring drives the pin 3 to reset, so that the unlocking grooves 31 of all the pins 3 are no longer aligned in the axial direction of the core body 2, thereby reducing the possibility of accidental unlocking.

[0049] In another embodiment, if Figures 6 to 8 As shown, in order to keep the locking rod 4 extending out of the core body 2 and plugging into the locking groove 11, connecting blocks 43 are provided on both ends of the locking rod 4, and a second elastic member 6 is provided between the connecting block 43 and the core body 2. Specifically, the second elastic member 6 includes a second return spring, one end of which is installed on the side of the connecting block 43 facing the pin 3, and the other end is arranged on the core body 2. When the core body 2 rotates to drive the locking rod 4 to slide out along the groove wall of the locking groove 11, the locking rod 4 slides toward the pin 3 and squeezes the second return spring, so that the end of the locking rod 4 away from the pin 3 abuts against the inner hole wall of the shell 1, and when the locking rod groove 23 is aligned with the locking groove 11, the second return spring abuts against the locking rod 4 toward the locking groove 11 so that the locking rod 4 abuts in the locking groove 11 to lock the door.

[0050] In another embodiment, in order to facilitate the locking rod 4 to slide out of the locking groove 11, a contact arc surface 42 is provided on the side surface of the locking rod 4 away from the pin 3, and the contact arc surface 42 abuts against the groove wall of the locking groove 11. During the rotation of the core body 2, the contact arc surface 42 slides away from the locking groove 11 along the groove wall of the locking groove 11. By setting the contact arc surface 42, the possibility of sliding obstruction due to the existence of edges and corners between the side of the locking rod 4 abutting against the locking groove 11 and the groove wall of the locking groove 11 is reduced.

[0051] In another embodiment, if Fig. 9 As shown, in order to increase the difficulty of unlocking the lock when using a technical unlocking tool, a plurality of illusion grooves 41 are distributed along the length direction of the locking rod 4, and the plurality of illusion grooves 41 correspond one-to-one to the plurality of pins 3. When the limiting protrusion 32 on any one of the pins 3 is inserted into the illusion groove 41, it gives the unlocking personnel the illusion that the lock can be unlocked, thereby increasing the difficulty of unlocking the lock when using a technical unlocking tool.

[0052] like Fig.10 As shown, considering the processing cost of the locking rod 4 , the illusion groove 41 can also be set through the length direction of the locking rod 4 .

[0053] In another embodiment, the limiting protrusion 32 is protruding from the side of the pin 3 facing the locking rod 4. When the groove wall of the illusion groove 41 abuts against the side of the limiting protrusion 32 facing the locking rod 4, the locking rod 4 cannot exit the locking groove 11 because the distance between the limiting protrusion 32 and the inner hole wall of the shell 1 is smaller than the width of the locking rod 4.

[0054] In another embodiment, if Fig.11 As shown, the pin 3 is provided with an anti-theft false groove 33 whose depth is less than the unlocking groove 31. At this time, the limiting protrusion 32 is located between the anti-theft false groove 33 and the unlocking groove 31. When the illusion groove 41 is plugged into the limiting protrusion 32, the bottom wall of the illusion groove 41 abuts against the side of the limiting protrusion 32 facing the locking rod 4, resulting in the distance between the side of the locking rod 4 facing the pin 3 and the inner hole wall of the shell 1 being less than the width of the locking rod 4, resulting in the locking rod 4 being unable to withdraw from the locking groove 11 during the rotation of the core 2; in addition, when the illusion groove 41 is plugged into the limiting protrusion 32, the side of the locking rod 4 facing the pin 3 may also abut against the bottom surface of the anti-theft false groove 33, resulting in the locking rod 4 abutting against one end of the locking groove 11 and being unable to withdraw from the locking groove 11.

[0055] In another embodiment, if Fig.11 As shown, in order to facilitate the alignment of all the unlocking grooves 31 on the pin 3 along the axial direction of the core body 2 to form an unlocking groove, a protruding rib 34 is provided on the side surface of the pin 3 facing away from the locking groove 11, and the protruding rib 34 extends into the key insertion hole 21. During the insertion of the key into the key insertion hole 21, the protruding rib 34 slides along the tooth groove on the key to drive all the unlocking grooves 31 to align in the axial direction of the core body 2 to form an unlocking groove and align with the locking rod 4. The protruding rib 34 facilitates the pin 3 to move in the pin groove 22.

[0056] In another embodiment, the utility model also provides a lock, including the aforementioned lock core, and the aforementioned lock core is applied to the lock to increase the difficulty of opening the lock using technical unlocking tools, thereby further reducing the possibility of the door being opened by technical unlocking tools.

[0057] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A lock core, comprising a shell, a core, a pin and a locking rod, wherein a locking groove is arranged on the inner wall of the shell, the core is rotatably arranged in the inner hole of the shell, the pin is slidably arranged in the core parallel to the radial surface of the core, the locking rod extends along the axial direction of the core and is slidably arranged in the core along the radial direction of the core, the locking rod has a tendency to stay extended from the core and cooperate with the locking groove, the pin is provided with an unlocking groove, and the unlocking grooves of all the pins are aligned along the axial direction of the core to form an unlocking groove for accommodating the locking rod, characterized in that: An illusion groove is arranged on one side of the locking rod facing the pin, and a limiting protrusion is arranged on the side of the pin facing the locking rod. After the limiting protrusion is inserted into the illusion groove, the locking rod cannot exit the locking groove.

2. The lock core according to claim 1, characterized in that: There are a plurality of pins distributed along the length direction of the locking rod, and any limiting protrusion is inserted into the illusion groove so that the locking rod cannot exit the locking groove.

3. The lock core according to claim 1, characterized in that: The core body has a key insertion hole, and two groups of pins are symmetrically distributed about the key insertion hole, and the two groups of pins correspond to the two locking rods.

4. The lock core according to claim 2 or 3, characterized in that: The plurality of limiting protrusions are distributed on both sides of the locking rod.

5. The lock core according to claim 1, characterized in that: There are a plurality of illusion grooves distributed along the length direction of the locking rod, and the plurality of illusion grooves correspond one-to-one to a plurality of pins distributed along the length direction of the locking rod; or, the illusion grooves are arranged through the length direction of the locking rod.

6. The lock core according to claim 1, characterized in that: The limiting protrusion is protrudingly arranged on the side of the pin facing the locking rod, and when the groove wall of the illusion groove abuts against the side of the limiting protrusion facing the locking rod, the locking rod cannot exit the locking groove.

7. The lock core according to claim 1, characterized in that: A contact arc surface is arranged on the side of the locking rod away from the pin, and the contact arc surface abuts against the groove wall of the locking groove. The contact arc surface slides away from the locking groove along the groove wall of the locking groove during the rotation of the core body.

8. The lock core according to claim 1, characterized in that: Both ends of the locking rod are protrudingly provided with connecting blocks, and a second elastic member is arranged between the connecting block and the core body. The elastic force of the second elastic member enables the locking rod to have a tendency to extend out of the core body and cooperate with the locking groove.

9. The lock core according to claim 1, characterized in that: A fake anti-theft groove with a depth less than that of the unlocking groove is provided on the side of the pin facing the locking rod, and the limiting protrusion is located between the fake anti-theft groove and the unlocking groove. After the limiting protrusion is inserted into the illusion groove, the locking rod abuts against the bottom surface of the fake anti-theft groove, so that the locking rod cannot withdraw from the locking groove; and / or, a raised rib is provided on the side of the pin facing away from the locking rod, and during the key insertion process, the raised rib drives the pin to slide along the tooth groove on the key so that the unlocking groove is aligned with the locking rod.

10. A lock, comprising a lock core, characterized in that: The lock core is a lock core as claimed in any one of claims 1 to 9.

Images