An anti-theft lock cylinder structure and a matching key

Abstract

The present invention discloses a lock cylinder structure of an anti-theft lock, which includes a lock cylinder body, a keyhole, a locking lower pin and a corresponding locking lower pin hole. A receiving cavity is provided on the lock cylinder body, and a locking assembly is arranged in the receiving cavity. The locking assembly includes a locking member and an elastic member. A clamping position cooperating with the locking member is arranged on the locking lower pin. When the locking lower pin moves in the locking lower pin hole and the locking member aligns with the clamping position, the locking member is snapped into the clamping position under the action of the elastic member. The present invention also discloses a matching key for the above lock cylinder structure. This improvement has a simple structure, low processing cost, low precision requirement and good anti-theft effect.

Description

Technical Field

[0001] The present invention relates to the technical field of locks, and particularly relates to an anti-theft lock cylinder structure and a matching key. Background Art

[0002] The existing lock cores on the market include the lock cores of intelligent locks (fingerprint, magnetic card, password lock, etc.). To improve the anti-theft function, most are achieved by improving the structure of the pins. For example, structures such as pearl-in-pearl, mother-and-child beads, hollow beads, cross grids, and side beads have emerged, or the key rate is increased. Relatively few improvements have been made to the lock cylinder structure. Due to the continuous improvement of the pin structure, the pin structure has become more and more complex. Although the security has been improved, the processing accuracy requirements and processing costs have also increased accordingly. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an anti-theft lock cylinder structure and a matching key with simple processing, low production cost, anti-picking, anti-prying, anti-vibration unlocking, and anti-unauthorized key unlocking.

[0004] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0005] The anti-theft lock cylinder structure of the present invention includes a lock cylinder body, a keyhole, lower pins, and corresponding lower pin holes. The lower pins include locking lower pins. A receiving cavity is provided on the lock cylinder body, and a locking component is provided in the receiving cavity. The locking component includes a locking member and an elastic member. A clamping position cooperating with the locking member is provided on the locking lower pin. When the locking lower pin moves in the corresponding locking lower pin hole and the locking member aligns with the clamping position, the locking member is snapped into the clamping position under the action of the elastic member.

[0006] Further, the locking member is a pin shaft, the elastic member is a spring, and the pin shaft can move horizontally in the receiving cavity.

[0007] Still further, the clamping position is a groove.

[0008] Still further, at least one ordinary lower pin and a corresponding ordinary lower pin hole are provided behind the locking lower pin.

[0009] Still further, when locked, the length of the locking lower pin extending out of the keyhole is greater than the length of the ordinary lower pin extending out of the keyhole.

[0010] Still further, a relief hole for the pin shaft to pass through is provided at the position of the ordinary lower pin corresponding to the clamping position.

[0011] Still further, the ordinary lower pin is a mother-and-child bead structure.

[0012] Furthermore, the pin shaft is T-shaped, and the accommodating cavity has a stop portion for stopping the lateral movement of the pin shaft.

[0013] A key adapted to the anti-theft lock cylinder structure described above includes a holding portion and a key pattern portion. The key pattern portion has key patterns adapted to the lower pins. An opening groove is provided in the key pattern portion along the direction of key insertion, and the key patterns are located at the bottom of the opening groove.

[0014] Further, the depth H of the opening groove is 0.2 cm - 0.8 cm.

[0015] The beneficial effects of the present invention are as follows: Compared with the prior art, by improving the lock cylinder structure, a clamping position is provided on the pin, and a locking member is provided on the lock cylinder body. Through picking, prodding, or vibration, it is easy for the locking member to be stuck in the clamping position, thereby locking the lock cylinder and making it impossible to unlock. This improvement has a simple structure, low processing cost, low precision requirements, and good anti-theft effect. This lock cylinder can be adapted to a key with an opening groove. The key patterns start to be cut from the bottom of the opening groove. When the adapted key is inserted into the lock cylinder, due to the existence of the opening groove, the bottom surface of the opening groove will not press the locking lower pin to align the clamping position thereon with the position of the locking member, and the lock can be opened smoothly; when a non-adapted key, that is, an illegal key or foreign object, is inserted into the lock cylinder, it will press the locking lower pin to align the clamping position thereon with the position of the locking member, resulting in the lock cylinder being locked, achieving the purpose of preventing illegal key unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the drawings and embodiments.

[0017] Figure 1 is a perspective view of an embodiment of the present invention;

[0018] Figure 2 is Figure 1 a sectional view of the structure shown with the locking lower pin in an unlocked state;

[0019] Figure 3 is Figure 1 a sectional view of the structure shown with the locking lower pin in a locked state;

[0020] Figure 4 is a sectional view of the lock cylinder and the key in a cooperating and unlockable state;

[0021] Figure 5 is a side view of a common lower pin;

[0022] Figure 6 is a sectional view of an adapted key;

[0023] Figure 7 is a perspective view of an adapted key. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] See Figures 1 to 5 , which shows an embodiment of the lock cylinder structure of an anti-theft lock according to the present invention, including a lock cylinder body 1, a keyhole 11, a locking lower ball 2 and a corresponding locking lower ball hole 12, a common lower ball 3 and a corresponding common lower ball hole 13. A receiving cavity 14 is provided on the lock cylinder body 1, and a locking assembly is provided in the receiving cavity 14. The locking assembly includes a locking member and an elastic member. A clamping position cooperating with the locking member is provided on the locking lower ball 21. When the locking lower ball 2 moves in the locking lower ball hole 12 and the locking member aligns with the clamping position, the locking member is snapped into the clamping position under the action of the elastic member.

[0025] The locking member can be a snap, a hook structure, or a pin shaft. See Figures 2 - 3 , it can be seen that the locking member of the present invention is preferably a pin shaft 4. The elastic member can be a spring, a spring piece, etc. The elastic member of the present invention is preferably a spring 5. At this time, the receiving cavity 14 is horizontally arranged on the lock cylinder body 1, and the pin shaft 4 can move horizontally in the receiving cavity 14. Here, the horizontal direction refers to the direction of key insertion and extraction. The clamping position can be a through hole, an opening, a groove, etc. The clamping position shown in the present invention is a groove 21. When picking, prodding or vibrating the locking lower ball 2 during illegal unlocking, the locking lower ball 2 moves up and down in the locking lower ball hole 12. When the groove 21 of the locking lower ball 2 aligns with the pin shaft 4, the pin shaft 4 is pushed by the spring 5 and inserted into the groove 21. See Figure 3 , the locking lower ball 2 is stuck between the lock cylinder and the lock shell (not shown), and the lock cylinder cannot rotate, completely locking the lock, achieving the purpose of preventing illegal unlocking.

[0026] In order to further increase the difficulty of technical unlocking, at least one common lower ball 3 and a corresponding common lower ball hole 13 are provided behind the locking lower ball 2. The common lower ball 3 of the present invention is one and is arranged in parallel behind the locking lower ball 2. Here, the "behind" refers to the position far from the insertion opening 111 of the keyhole. Its advantage is that since the common lower ball 3 is behind the locking lower ball 2, when picking or prodding the balls with a tool, the tool extends into the lock cylinder from the insertion opening 111 and must first pick or prod the locking lower ball 2 before picking or prodding the common lower ball 3. In this way, when picking or prodding the locking lower ball 2 first, the locking lower ball 2 is easily locked by the locking member in the clamping position. A more preferred solution is that when the lock is locked, the length of the locking lower ball 2 extending out of the keyhole 11 is greater than the length of the common lower ball 3 extending out of the keyhole 11. The advantage of such a structure is that when picking or prodding the ball behind the locking lower ball 2, it is inevitable to pick or prod the locking lower ball 2, further increasing the difficulty of technical unlocking. In order to improve the compactness of the lock cylinder structure, see Figures 2 - 5, a clearance hole 31 for the pin shaft 4 to pass through is set at the position of the ordinary lower pin 3 corresponding to the said blocking position. There can be several ordinary lower pins 3. The ordinary lower pin 3 can be a lower pin of the prior art. Preferably, the ordinary lower pin 3 is a mother-child bead structure, with a child lower bead 32 and a mother lower bead 33. This structure further increases the technical difficulty of unlocking. Under this structure, the length of the locking lower pin 2 and the ordinary lower pin 3 extending out of the keyhole 11 can be controlled by the stopper 121 in the locking lower pin hole 12, the stopper 131 in the ordinary lower pin hole 13, the stopper 132 in the child lower bead hole and the length of the pin itself.

[0027] In addition to the locking lower pin 2 and the common lower pin 3, the present invention may also have other lower pins that are the same as those in the prior art.

[0028] In order to make the pin 4 properly clamp the position of the clamping position, the pin 4 is preferably T-shaped, and the accommodating cavity 14 has a stopper 141 for stopping the lateral movement of the pin 4. The function of the stopper 141 is to control the lateral movement distance of the pin 4 to meet the design requirements.

[0029] Since the displacement of the lower pin 2 will cause the locking pin 2 to align with the locking member, thereby locking the lock cylinder and preventing the lock cylinder from rotating, an adapted key is required to ensure normal unlocking and prevent illegal key unlocking. Figures 6 - 7 The key 6 includes a grip portion 61 and a tooth portion 62, wherein the tooth portion 62 has a tooth 621 that matches the lower pin. The inventive point is that the tooth portion 621 is provided with an opening groove 622 along the direction of key insertion, and the tooth 621 is located at the bottom of the opening groove 622, that is, the tooth 621 starts to open from the bottom surface 6222 of the opening groove. During operation, when the key 6 is inserted into the lock core, the bottom surface 6222 of the opening groove 622 is at a certain depth H from the key surface 623, so the bottom surface 6222 of the opening groove can ensure that the locking lower pin 2 does not reach the position aligned with the locking member before the locking lower pin 2 falls into the corresponding tooth, and the lock can be unlocked smoothly. When an unsuitable key, i.e., an illegal key or foreign object, is inserted into the lock core, the surface 623 of the key fits against the bottom surface 112 of the keyhole, and then when it contacts and presses down the locking pin 2, the locking pin 2 is pressed to a deeper position, so that the position on the locking pin 2 is aligned with the position of the locking element, causing the lock core to be locked, thereby achieving the purpose of preventing illegal keys from unlocking the lock. As a preferred embodiment, the depth H of the opening groove 622 is 0.2cm-0.8cm. Except for the opening groove part, the other parts of the key of the present invention can be other structures of the prior art according to the structure of the matched lock, such as the key of the present invention. Figure 7In the gum part 62, there are two track grooves 624 and 625. The opening groove 622 is located in the middle of the two track grooves. The bottom of the two track grooves is deeper than the bottom of the opening groove 622 so as to distinguish the track grooves from the opening groove.

[0030] The orientation or positional relationship indicated by "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. in the text is based on the orientation or positional relationship shown in the drawings. It is 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 operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] The above embodiments cannot limit the protection scope of the present invention. Those skilled in the art of this technology, without departing from the overall concept of the present invention, the equivalent changes in technical means made still fall within the protection scope of the present invention.

Claims

1. A lock core structure of an anti-theft lock, comprising a lock core body (1), a keyhole (11), lower marbles and corresponding lower marble holes, characterized in that: The lower pin includes a locking lower pin (2). A receiving cavity (14) is provided on the lock cylinder body (1). A locking assembly is provided in the receiving cavity (14). The locking assembly includes a locking member and an elastic member. A clamping position that cooperates with the locking member is provided on the locking lower pin (2). The locking lower pin (2) moves in a corresponding locking lower pin hole (12). The locking member is a pin shaft (4), and the elastic member is a spring (5). The pin shaft (4) can move horizontally in the receiving cavity (14). At least one ordinary lower pin (3) and a corresponding ordinary lower pin hole (13) are provided behind the locking lower pin (2). Here, "behind" refers to the position away from the insertion opening (111) of the keyhole. A relief hole (31) for the pin shaft (4) to pass through is provided at the position of the ordinary lower pin (3) corresponding to the clamping position. When a matching key is inserted into the lock cylinder body (1), it can ensure that the clamping position of the locking lower pin (2) does not reach the position aligned with the locking member, and the lock can be opened. When a non-matching key or foreign object is inserted into the lock cylinder body (1), when the locking member is aligned with the clamping position, the locking member is snapped into the clamping position under the action of the elastic member, and the lock cylinder body (1) cannot rotate, locking the lock.

2. The anti-theft lock cylinder structure according to claim 1, characterized in that The clamping position is a groove (21).

3. The anti-theft lock cylinder structure according to claim 1, characterized in that, When locked, the length that the locking lower pin (2) extends out of the keyhole (11) is greater than the length that the ordinary lower pin (3) extends out of the keyhole (11).

4. The anti-theft lock cylinder structure according to claim 1, characterized in that The ordinary lower pin (3) has a mother-and-daughter bead structure.

5. The anti-theft lock cylinder structure according to claim 1, characterized in that The pin shaft (4) is T-shaped, and the receiving cavity (14) has a stop portion (141) that stops the horizontal movement of the pin shaft.

6. A key (6) adapted to cooperate with the lock cylinder structure of the anti-theft lock according to any one of claims 1-5, comprising a holding portion (61) and a key pattern portion (62), wherein the key pattern portion (62) has key patterns (621) adapted to cooperate with the lower pins, characterized in that An opening groove (622) is provided in the key tooth portion (62) along the direction of inserting the key. The key tooth (621) is located at the bottom of the opening groove (622). The bottom surface (6222) of the opening groove (622) is at a certain depth H from the key surface (623). The key tooth portion (62) has two track grooves (624, 625). The opening groove (622) is located in the middle of the two track grooves (624, 625).

7. The key according to claim 6, characterized in that The depth H of the opening groove (622) is 0.2 cm - 0.8 cm.

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