Patent Publication Number: US-2022220776-A1

Title: Miniature Smart Lock with Anti-Prising Function

Description:
TECHNICAL FIELD 
     The present invention relates to a lock, in particular to a miniature smart lock with an anti-prizing function. 
     BACKGROUND 
     With continuous development of science and technology, intelligence and security has become the subject of research. In particular, how to improve the security of cabinet doors of dedicated counters, showcases, and show windows in the retail industry as well as smart home equipment has become a subject of eager research. Compared with traditional mechanical locks, electronic locks are more convenient to use, and have been greatly improved both in technic and performance, and have become more and more popular in recent years. 
     However, the traditional electronic locks are large in size and are not suitable for mounting environment of small objects, and in course of actual use, the rack and pinion mechanisms of the traditional electronic locks will be affected by complex physical and chemical reactions produced by dust and moisture accumulated in the operating space for a long time when the temperature changes. In addition, the traditional electronic locks have poor anti-prizing performance, which poses a financial safety hazard to users. 
     SUMMARY 
     An objective of the present invention is to provide a miniature smart lock with an anti-prizing function, which has a simple structure and is safe and reliable, so as to solve the above-mentioned problem proposed in the background art. 
     In order to achieve the above objective, the present invention provides the following technical solution: 
     A miniature smart lock with an anti-prizing function, including a lock shell, and a magnetic rod, a push head, a bolt, a V-shaped push rod, an anti-prizing guide slot, and a positioning guide pin, which are mounted in the lock shell, wherein a magnetic coil is mounted surrounding an outer portion of the magnetic rod, a magnetic rod spring is mounted on the magnetic rod on the left side of the magnetic coil, the push head is mounted at the right end of the magnetic rod, the V-shaped push rod is connected to the right end of the push head by means of a V-shaped push rod connection pin, the V-shaped push rod is movably connected to the bolt by means of an anti-prizing pin, and an end of the anti-prizing pin, which passes through the V-shape push rod and the bolt, is arranged within the anti-prizing guide slot, the positioning guide pin is connected to the right side of the bolt, and a return spring connected with the lock shell is mounted at the lower part of the positioning guide pin. 
     Preferably, the anti-prizing guide slot is V-shaped. 
     Preferably, the bottom lateral slot of the anti-prizing guide slot is parallel to the bottom of the lock shell, and the longitudinal slot extends towards the top of the lock shell in an inclined line. 
     Preferably, a lock catch plate is mounted at the bottom of the lock shell. 
     Preferably, the net size of the lock shell is 50 mm to 145 mm in length, 14 mm to 28 mm in height, and 14 mm to 20 mm in width. 
     Compared with the prior art, the beneficial effects of the present invention are: 
     the present invention is small in terms of size and has a simple structure, and is not restricted by the mounting environment; electromagnetic driving is used such that the lock is unlocked when power is on and is locked when power is off, thus the lock is not affected by changes in temperature and is safe and durable; in addition, with the clever design of the positioning guide pin and the anti-prizing guide slot, the positioning guide pin is located at the far left of a horizontal portion of the anti-prizing guide slot during power-off locking, such that the bolt cannot be directly lifted up for unlocking, thereby achieving the effect of being anti-prizing and being safe and reliable. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of the structure of the present invention. 
       In the Figure:  6 —magnetic rod spring;  7 —magnetic coil;  8 —magnetic rod;  9 —push head;  10 —bolt;  11 —V-shaped push rod;  12 —anti-prizing guide slot;  13 —anti-prizing pin;  14 —positioning guide pin;  15 —return spring;  16 —lock shell;  17 —V-shaped push rod connection pin;  21 —lock catch plate. 
     
    
    
     DETAILED DESCRIPTION 
     The technical solution of the present patent will be described in further detail below in conjunction with a specific embodiment. 
     Please refer to  FIG. 1 , a miniature smart lock with an anti-prizing function includes a lock shell  16 , and a magnetic rod  8 , a push head  9 , a bolt  10 , a V-shaped push rod  11 , an anti-prizing guide slot  12 , and a positioning guide pin  14 , which are mounted in the lock shell  16 . The net size of the lock shell  16  is 50 mm to 145 mm in length, 14 mm to 28 mm in height, and 14 mm to 20 mm in width. A lock catch plate  21  is mounted at the bottom of the lock shell  16 . A magnetic coil  7  is mounted surrounding an outer portion of the magnetic rod  8 , a magnetic rod spring  6  is mounted on the magnetic rod  8  on the left side of the magnetic coil  7 , and the push head  9  is mounted at the right end of the magnetic rod  8 . The V-shaped push rod  11  is connected to the right end of the push head by means of a V-shaped push rod connection pin  17 , the V-shaped push rod  11  is movably connected to the bolt  10  by means of an anti-prizing pin  13 , and an end of the anti-prizing pin  13 , which passes through the V-shape push rod  11  and the bolt  10 , is arranged within the anti-prizing guide slot  12 . The anti-prizing guide slot  12  is V-shaped, the bottom lateral slot of the anti-prizing guide slot  12  is parallel to the bottom of the lock shell, and the longitudinal slot of the anti-prizing guide slot  12  extends towards the top of the lock shell in an inclined line. The positioning guide pin  14  is connected to the right side of the bolt  10 , and a return spring  15  connected with the lock shell  16  is mounted at the lower part of the positioning guide pin  14 . 
     The working principle of the miniature smart lock with an anti-prizing function is as follows. 
     When the miniature smart lock is unlocked, the magnetic coil  7  is powered on by a DC 8V to 12V power supply to generate a magnetic field and make the magnetic rod  8  move to the right, and the push head  9  is linked to push the V-shaped push rod  11 , thereby through the V-shaped push rod, driving the anti-prizing pin  13  first to slide to the right horizontally to the far right within the anti-prizing guide slot  12 , and then to move upward along the inclined line part of the anti-prizing guide slot  12 , and at the same time to drive the bolt  10  to lift up. The power-on time of the magnetic coil  7  is 1 second to 6 seconds (which can be adjusted by the related control software). If the energizing of the magnetic coil  7  ends, the magnetic field of the magnetic coil  7  disappears, and the bolt  10  is moved downward through the return spring  15 , and the anti-prizing pin  13  is driven to move downward along the vertical part of the anti-prizing guide slot  12  until the bolt  10  is reset and locked, and while the return spring  15  moves, the magnetic rod spring  6  drives the magnetic rod  8  and the push head  9  and links the V-shaped push rod  11  to move to the left, and at the same time the V-shaped push rod  11  drives the anti-prizing pin  13  to move to the left in the horizontal part of the anti-prizing guide slot  12  to the far left, that is, the anti-prizing pin  13  is reset; after the anti-prizing pin  13  is reset, the bolt  10  cannot be directly lifted upwards, so that the anti-prizing function of the bolt is achieved. 
     A preferred embodiment of the present patent has been described in detail above, but the present patent is not limited to the above embodiment and within the scope of knowledge possessed by those of ordinary skill in the art, it is also possible to make various variations without departing from the gist of the present patent.