Search

CN-224200398-U - Pick-proof mechanical door lock

CN224200398UCN 224200398 UCN224200398 UCN 224200398UCN-224200398-U

Abstract

The utility model relates to the technical field of theft prevention, and discloses an anti-prying mechanical door lock which comprises a lock cylinder, a shell and a lock shell positioned between the lock cylinder and the shell. The lock core is provided with a lock tongue control assembly and at least one anti-prying linkage assembly. The anti-prying linkage assembly drives the anti-prying limit column to be clamped into a door frame lock hole through the tooth-shaped groove sliding connection of the first anti-prying sliding block and the anti-prying sliding rod, meanwhile, the second anti-prying sliding block is linked with the first sliding block of the lock tongue control assembly to compress the second spring to force the lock tongue to lock the door frame, the lock tongue and the anti-prying limit column are ensured to be clamped into the door frame in a locking state, a double rigid locking state is formed, and even if the lock cylinder is prized, the anti-prying limit column can still independently realize a door locking function, so that anti-prying performance is improved.

Inventors

  • JIN DAOZHONG
  • Jin Qianxi
  • Jin Daoyun

Assignees

  • 乐清市鑫菱电气有限公司

Dates

Publication Date
20260505
Application Date
20250530

Claims (10)

  1. 1. The utility model provides an anti-picking mechanical door lock, includes lock core (2) and shell (3), be provided with lock shell (4) between lock core (2) and shell (3), the internal surface of lock shell (4) and the surface sliding connection of lock core (2), the surface of lock shell (4) and shell (3) fixed connection; The utility model provides a lock core (2) is last to be provided with key hole (24) that can insert key (1) that vertically run through, be located first leading wheel (26) and a plurality of first marble hole (25) of lock core (2) side surface, first leading wheel (26) and lock core (2) side surface fixed connection, its characterized in that: The lock core (2) is further provided with a lock tongue control assembly (21) and at least one anti-prying linkage assembly (22), the lock tongue control assembly (21) is used for controlling the door lock to be opened and closed under the rotation driving of a first guide wheel (26), and the lock tongue control assembly (21) is fixedly connected with the anti-prying linkage assembly (22) and used for triggering the locking state of the door lock and a door frame under the action of abnormal external force.
  2. 2. The anti-prying mechanical door lock according to claim 1, wherein the anti-prying linkage assembly (22) comprises a first anti-prying sliding block (223), an anti-prying limiting column (224), an anti-prying sliding rod (225) and a second anti-prying sliding block (226), one end of the anti-prying sliding rod (225) is fixedly connected with one end of the second anti-prying sliding block (226), one side, close to the anti-prying sliding rod (225), of the first anti-prying sliding block (223) is provided with a tooth-shaped groove for enabling the first anti-prying sliding block (223) to slide, and one end, far away from the lock cylinder (2), of the first anti-prying sliding block (223) is fixedly connected with the anti-prying limiting column (224).
  3. 3. The anti-prying mechanical door lock according to claim 2, wherein the shell (3) is provided with an anti-prying hole (33), an anti-prying sliding rod groove (34) and an anti-prying sliding groove (36), the first anti-prying sliding block (223) penetrates through the anti-prying hole (33), the anti-prying sliding rod groove (34) is in sliding connection with the anti-prying sliding rod (225), and the anti-prying sliding groove (36) is in sliding connection with the second anti-prying sliding block (226); Two ends of the anti-prying hole (33) are provided with second fixing blocks (221) fixedly connected with the shell (3), and the second fixing blocks (221) are connected with the first anti-prying sliding blocks (223) through third springs (222).
  4. 4. A pick-proof mechanical door lock according to claim 3, wherein the latch control assembly (21) comprises a pressing rod (211), a sliding rod (213) and a latch (216), one side of the first guide wheel (26) away from the lock core (2) is provided with a hole, a first spring (212) is arranged between one end of the pressing rod (211) and the first guide wheel (26), the pressing rod (211) and the first spring (212) are both positioned inside the hole of the first guide wheel (26), the outer surface of the pressing rod (211) is slidably connected with the inner surface of the first guide wheel (26), one end of the pressing rod (211) away from the lock core (2) is provided with a limiting structure, the end face of the limiting structure is provided with a pressing rod plane (2111), one end of the pressing rod (213) is slidably connected with the pressing rod plane (2111), the other end of the pressing rod (213) is slidably connected with the latch (216), the pressing rod (211) is driven to move when the lock core (2) rotates, the pressing rod (213) is separated from the constraint under the action of the spring, a sliding rod groove (37) is arranged on the inner surface of the housing (3), and the sliding rod groove (37) is slidably connected with the sliding rod (213).
  5. 5. The pick-proof mechanical door lock according to claim 4, wherein the fixing post (35) is further fixedly arranged on the housing (3), the fixing hole (43) is arranged on the lock shell (4), and the fixing hole (43) is sleeved on the fixing post (35) to fix the housing (3) and the lock shell (4).
  6. 6. The anti-prying mechanical door lock according to claim 5, wherein the housing (3) is further provided with a lock tongue shell (31), a sliding rail (219), a second sliding block (218) and a first fixing block (217), the lock tongue shell (31) is located at one end of the anti-prying sliding groove (36), the lock tongue shell (31) is provided with a sliding groove (32), the sliding groove (32) is provided with a first sliding block (214), the first sliding block (214) is connected with the sliding groove (32) through a second spring (215), one end of the second anti-prying sliding block (226) is fixedly connected with the first sliding block (214), and the sliding rail (219) is fixedly connected with the lock tongue shell (31); The second slider (218) slides along slide rail (219), the one end that lock core (2) was kept away from to second slider (218) passes through spring coupling with first fixed block (217), first fixed block (217) are fixed on spring bolt shell (31), spring bolt (216) and first fixed block (217) sliding connection, second slider (218) are hollow structure, the one end and spring bolt (216) fixed connection of second slider (218) for drive spring bolt (216) and retract under the spring action.
  7. 7. The pick-proof mechanical door lock according to claim 6, wherein the side surface of the lock case (4) is provided with a second guide wheel groove (41), a first guide wheel groove (42) and a plurality of second pin holes (44), the first guide wheel (26) slides along the first guide wheel groove (42), and the second pin holes (44) are consistent with the first pin holes (25) in size and number of apertures and are used for inserting pin tumbler sets (23).
  8. 8. The pick-proof mechanical door lock according to claim 7, wherein the pin tumbler stack (23) comprises a first pin tumbler (231) located in the first pin tumbler hole (25) and a second pin tumbler (232) located in the second pin tumbler hole (44), and the key (1) is provided with a tooth socket (11) corresponding to the first pin tumbler (231) for pushing the first pin tumbler (231) to align the pin tumbler stack (23).
  9. 9. The pick-proof mechanical door lock according to claim 8, wherein the lock cylinder (2) is further provided with a second guide wheel (27) located below the first guide wheel (26), the second guide wheel (27) is fixedly connected with the first guide wheel (26) through a vertical rod, the second guide wheel (27) slides on a second guide wheel groove (41), and an arc-shaped limit groove for sliding of the vertical rod is arranged in the first guide wheel groove (42) to limit the sliding position of the first guide wheel (26).
  10. 10. The anti-prying mechanical door lock according to claim 2, wherein a taper angle is formed at one end of the anti-prying limiting column (224) away from the lock cylinder (2), the taper angle is partially protruded out of the surface of the shell (3) in a normal state, when the lock cylinder (2) is not unlocked, abnormal external force is applied to the lock cylinder, and the first anti-prying sliding block (223) enables the anti-prying limiting column (224) to be clamped into the door frame under the action of the third spring (222).

Description

Pick-proof mechanical door lock Technical Field The utility model relates to the technical field of theft prevention, in particular to an anti-prying mechanical door lock. Background The mechanical door lock is used as a core component in the field of security protection, and the anti-prying performance of the mechanical door lock is always the key point of industry research and development. However, the existing mechanical door lock still has the obvious defects that firstly, the connecting structure of a lock body and a door frame is usually fixed by only inserting a lock tongue into a tooth socket of the door frame, when an external force forcibly pries a gap between a shell and the door frame, the shell is easy to separate from the door frame and further damage the inner marble structure of a lock cylinder due to lack of an effective rigid supporting structure, and secondly, the traditional lock tongue unlocking mechanism is mostly driven by a single spring, and when the traditional lock tongue unlocking mechanism is damaged by violence, the linkage stability of a sliding rod and the lock tongue is insufficient, and the risk of unlocking failure or abnormal locking exists. Although part of the prior art shields tooth slots by adding limiting blocks or decorative structures, the problem of rigid fixation of the connection of the housing and the door frame is not solved. For example, in the prior art, the patent of the utility model with the authority bulletin number of CN222633134U discloses an anti-prying anti-theft door, which shields a tooth slot by arranging a decorative block at the outer side of a door lock, and enhances the stability of a lock body by utilizing a limiting block in the sliding slot, thereby improving the anti-prying capability to a certain extent. The lock body is limited to slide by the limiting block, but a fixed rod structure capable of being linked is not arranged between the shell and the door frame, and damage of continuous prying force to a gap between the shell and the door frame cannot be resisted. Disclosure of utility model (One) solving the technical problems Aiming at the defects of the prior art, the utility model provides an anti-prying mechanical door lock, which has the advantages of dynamic rigid fixation of a shell and a door frame and linkage stable control in the unlocking process, and solves the problems that the shell is separated from the door frame, the unlocking is invalid or abnormal locking is carried out under the prying power of the traditional door lock. (II) technical scheme In order to achieve the above purpose, the present utility model provides the following technical solutions: The anti-picking mechanical door lock comprises a lock cylinder and a shell, wherein a lock shell is arranged between the lock cylinder and the shell, the inner surface of the lock shell is in sliding connection with the outer surface of the lock cylinder, the outer surface of the lock shell is fixedly connected with the shell, a key hole which is vertically penetrated and can be inserted with a key, a first guide wheel positioned on the side surface of the lock cylinder and a plurality of first marble holes are formed in the lock cylinder, and the first guide wheel is fixedly connected with the side surface of the lock cylinder; The lock core is further provided with a lock tongue control assembly and at least one anti-prying assembly, the lock tongue control assembly is used for controlling the door lock to be opened and closed under the rotation drive of the first guide wheel, the lock tongue control assembly is fixedly connected with the anti-prying assembly, the lock tongue control assembly is used for triggering the locking state of the door lock and the door frame under the action of abnormal external force, and the lock tongue is forced to be reversely locked with the door frame through the cooperation of the first anti-prying sliding block and the tooth-shaped groove of the anti-prying sliding rod. Preferably, the pick-proof assembly comprises a first pick-proof sliding block, a pick-proof limiting column, a pick-proof sliding rod and a second pick-proof sliding block, wherein the pick-proof sliding rod is fixedly connected with one end of the second pick-proof sliding block, a tooth-shaped groove is formed in one side, close to the pick-proof sliding rod, of the first pick-proof sliding block, the first pick-proof sliding block is used for sliding, one end, far away from the lock cylinder, of the first pick-proof sliding block is fixedly connected with the pick-proof limiting column, the pick-proof sliding block is used for forming a double rigid locking state of the pick-proof limiting column and the lock tongue, and the door leaf is prevented from being opened by violent force. Preferably, the shell is provided with a prying-resistant hole, a prying-resistant sliding rod groove and a prying-resistant sliding groove, the first prying-resistant sliding block pene