Locking device and safety lock

Abstract

The technical scheme belongs to the technical field of locksets, and particularly relates to a locking device and a safety lock, the locking device comprises a locking seat, a locking part on the locking mechanism is inserted into the locking groove to form a locking area; the limiting mechanism is mounted on the locking seat; the locking mechanism comprises a pin shaft assembly which is arranged in the locking seat in a sliding mode, and a first limiting part is arranged at the side end of the pin shaft assembly. The locking piece is arranged in the locking seat in a sliding mode and movably abuts against the limiting mechanism, and a second limiting part is arranged on the locking piece; the second limiting part movably abuts against the first limiting part to limit unlocking of the pin shaft assembly, and an external lock head is locked in a locking groove of the locking base through the pin shaft assembly of the locking mechanism. In order to prevent the pin shaft assembly from being opened, a locking piece is designed for protection; meanwhile, the limiting mechanism is additionally arranged, so that unlocking caused by movement of the locking piece is effectively prevented; and through the design of multiple locking structures, the safety of the locking device is improved, and the safety problem possibly caused by mistaken unlocking by children is effectively avoided.

Description

Technical Field

[0001] This technical solution relates to the field of lock technology, specifically to a locking device and a safety lock. Background Technology

[0002] Children are very curious and often rummage through drawers, doors, windows, and other structures at home. As a result, it is not uncommon for children to get injured by these things, and there have even been cases of children falling from buildings.

[0003] To avoid these situations, safety locks have emerged, such as the child safety lock disclosed in Chinese patent CN202220960791.2, which includes a connecting strap and fixing and locking parts disposed at both ends of the connecting strap. By rotating the lock housing of the locking part, the locking operation is achieved by locking the positioning pin in the lock hole or by unlocking the positioning pin away from the lock hole.

[0004] However, it still has some shortcomings. The unlocking method is simple, and the lock can be unlocked simply by turning the lock shell. Since children are becoming smarter and more mischievous, this simple unlocking method is easily understood by children, and they may inadvertently turn the lock shell to open the lock while playing, which may cause certain safety hazards. Summary of the Invention

[0005] The purpose of this technical solution is to provide a locking device and a safety lock, which uses a locking mechanism to lock the external lock head, and a limiting mechanism to ensure the locking stability of the locking mechanism, thereby improving the problems of simple structure and poor security of existing safety lock locking devices.

[0006] The purpose of this technical solution is achieved as follows:

[0007] A locking device, comprising:

[0008] A locking base, which has a locking groove;

[0009] A locking mechanism is installed in the locking seat, and the locking part of the locking mechanism is inserted into the locking groove to form a locking area for locking the external lock head;

[0010] A limiting mechanism, which is installed on the locking seat, is used to restrict the unlocking of the locking mechanism;

[0011] The locking mechanism includes at least the following:

[0012] A pin assembly is slidably disposed within the locking seat, and the locking part of the pin assembly cooperates with the locking groove to form the locking area, and a limit part is provided on the side end of the pin assembly;

[0013] A locking element is slidably disposed within the locking seat, and a portion of the locking element extends out of the locking seat to form a push button two. The limiting mechanism movably abuts against the locking element, and the locking element is provided with a limiting part two.

[0014] The second limiting part abuts against the first limiting part to restrict the movement and unlocking of the pin assembly, thereby locking the external lock head within the locking area.

[0015] Preferably, the locking mechanism further includes:

[0016] The second elastic element is installed inside the locking seat, and its two ends are respectively connected to the inner wall of the locking seat and the rear end of the locking member. It is used to make the limiting part two at the front end of the locking member tend to move toward the side end of the pin assembly, so that the limiting part two is placed on the movement trajectory of the limiting part one.

[0017] Preferably, the pin assembly includes:

[0018] A slider is slidably disposed within the locking seat, and the rear end of the slider extends out of the locking seat to form a button; the side end of the slider has the limiting part.

[0019] A locking pin, the rear end of which is connected to the front end of the slider, and the front half of the locking pin has the locking part;

[0020] An elastic element is sleeved on the locking pin, and both ends of the elastic element are respectively connected to the front end of the sliding element and the locking seat, so as to make the locking part tend to move away from the locking groove and open the locking area;

[0021] The locking groove has a through hole on its side wall that connects its inner and outer sides, and the locking part is inserted into the locking groove through the through hole.

[0022] Preferably, the side end of the pin assembly has a limiting part three, which cooperates with the limiting part one and the side wall of the pin assembly to form a limiting groove one, and the front end of the locking member has a limiting groove two.

[0023] When the front end of the locking member moves toward the side end of the pin assembly, the second limiting part is inserted into the first limiting groove, and the third limiting part is inserted into the second limiting groove, thereby restricting the movement and unlocking of the pin assembly.

[0024] Preferably, the limiting mechanism includes at least:

[0025] A limiting member is slidably disposed within the locking seat, and a portion of the limiting member extends out of the locking seat to form a push button.

[0026] By pushing the limiting member toward the locking member, the limiting member is placed on the movement trajectory of the locking member, thereby causing the end of the limiting member to move against the rear end of the locking member, thus restricting the second limiting part from moving away from the movement trajectory of the first limiting part.

[0027] Preferably, the limiting mechanism further includes:

[0028] The third elastic element has its two ends connected to the limiting element and the locking seat, respectively, and is used to make the limiting element tend to move toward the locking element.

[0029] Preferably, the locking seat includes a housing and a cover connected to each other. The housing is provided with a mounting groove, and the mounting groove is provided with a notch 1, a notch 2, and a notch 3. The notch 1 is used to avoid the push button 2 on the locking member, the notch 2 is used to avoid the push button 1 of the limiting member of the limiting mechanism, and the notch 3 is used to avoid the button of the sliding member of the pin assembly. The cover is provided with a slider 1 and a slider 2. The locking member is provided with a groove 1 that slides and engages with the slider 1, and the limiting member of the limiting mechanism is provided with a groove 2 that slides and engages with the slider 2.

[0030] A safety lock, comprising:

[0031] Locking device;

[0032] A fixing device for mounting on an object to be installed;

[0033] A connector, one end of which is movably connected to the fixing device, and the other end is placed in the locking groove of the locking device and locked in the locking area by the locking part;

[0034] The fixing device includes:

[0035] A mounting bracket, used for mounting on the object to be installed;

[0036] A rotating component is hinged to the fixed base, and the rotating component is provided with a connecting groove;

[0037] A fixing pin is provided at both ends on the rotating part, and the middle part of the fixing pin is placed in the connecting groove and movably connected to one end of the connecting part.

[0038] Preferably, the connector is a chain, a connecting belt, or a rope, and the connector is provided with at least one connecting hole for insertion of the locking part.

[0039] Preferably, both the fixing seat and the locking seat are provided with mounting holes;

[0040] Alternatively, an adhesive layer may be provided on the rear end face of both the fixing seat and the locking seat.

[0041] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0042] 1. This technical solution uses the pin assembly of the locking mechanism to securely lock the external lock head in the locking groove of the locking seat; to prevent the pin assembly from being easily opened, a locking component is designed for protection; at the same time, a limit mechanism is added to effectively prevent the locking component from moving and unlocking; through the design of the multiple locking structure, the safety of the locking device is improved, and the safety problems that may be caused by children accidentally opening the lock are effectively avoided.

[0043] 2. This technical solution uses the second elastic element to automatically lock the locking element, ensuring that the pin assembly is securely locked and preventing it from being accidentally opened or unlocked due to movement. This improves the ease of use and avoids the problem of the pin assembly failing to lock due to the user forgetting to manually move the locking element, thereby ensuring the safety of the locking device.

[0044] 3. This technical solution involves installing a locking device and a fixing device on the two objects to be locked respectively, and connecting the locking device and the fixing device through a connector, thereby preventing the two objects from moving or separating and ensuring the stability and security of the objects after they are locked. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of this technical solution.

[0046] Figure 2 This is a schematic diagram of the locking device in this technical solution.

[0047] Figure 3 This is an exploded view of the locking device in this technical solution.

[0048] Figure 4 This is a partial exploded view of the locking device in this technical solution.

[0049] Figure 5 This is a schematic diagram of the locking device in the locked state of this technical solution.

[0050] Figure 6 This is a schematic diagram of the locking device in the unlocked state of this technical solution.

[0051] Figure 7 This is a schematic diagram of the fixing device in this technical solution.

[0052] Figure 8 This is an exploded view of the fixing device in this technical solution.

[0053] Reference numerals: 1. Locking device; 11. Locking seat; 12. Locking groove; 13. Locking area; 14. Through hole; 15. Housing; 151. Mounting groove; 152. Notch 1; 153. Notch 2; 154. Notch 3; 16. Cover; 161. Slider 1; 162. Slider 2;

[0054] 2. Locking mechanism; 21. Pin assembly; 22. Locking component; 221. Limiting part two; 222. Limiting groove two; 223. Push button two; 224. Slide groove one; 23. Elastic component two; 24. Sliding component; 241. Limiting part one; 242. Button; 243. Limiting part three; 244. Limiting groove one; 25. Locking pin; 251. Locking part; 26. Elastic component one;

[0055] 3. Limiting mechanism; 31. Limiting component; 32. Push button one; 33. Slide groove two; 34. Elastic component three;

[0056] 4. Fixing device; 41. Fixing base; 42. Rotating component; 421. Connecting groove; 43. Fixing pin;

[0057] 5. Connecting parts; 51. Connecting holes;

[0058] 6. Mounting holes. Detailed Implementation

[0059] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0060] See Figures 2-6 A locking device, comprising:

[0061] Locking seat 11, on which a locking groove 12 is provided;

[0062] The locking mechanism 2 is installed in the locking seat 11, and the locking part 251 of the locking mechanism 2 is inserted into the locking groove 12 to form a locking area 13 for locking the external lock head;

[0063] The limiting mechanism 3 is installed on the locking seat 11 to restrict the unlocking of the locking mechanism 2 and ensure that the locking mechanism 2 is in the locked state.

[0064] Among them, the locking mechanism 2 includes at least:

[0065] The pin assembly 21 is slidably disposed in the locking seat 11, and the locking part 251 of the pin assembly 21 cooperates with the locking groove 12 to form the locking area 13. The side end of the pin assembly 21 is provided with a limiting part 241, which is a limiting protrusion, a limiting block, or a limiting point.

[0066] The locking member 22 is slidably disposed in the locking seat 11, and the locking member 22 extends out of the locking seat 11 to form a push button 223. The surface of the push button 223 has anti-slip ridges. The limiting mechanism 3 is in movable contact with the locking member 22. By moving the limiting mechanism 3, the movement of the locking member 22 is restricted, thereby allowing the locking member 22 to restrict the movement of the pin assembly 21 and unlock it, thus ensuring that both the locking member 22 and the pin assembly 21 are in the locked state.

[0067] The locking member 22 is provided with a limiting part 221, which is a limiting protrusion, a limiting block, or a limiting point.

[0068] By moving the locking member 22, the second limiting part 221 is positioned on the movement trajectory of the first limiting part 241, thereby causing the second limiting part 221 to move and abut against the first limiting part 241, restricting the movement and unlocking of the pin assembly 21, thereby locking the external lock head within the locking area 13.

[0069] When unlocking, the limiting mechanism 3 is moved first to unlock the locking member 22, allowing the locking member 22 to move. Then, the locking member 22 is moved to unlock the pin assembly 21, allowing the pin assembly 21 to move. Finally, the pin assembly 21 is moved to make the locking part 251 of the pin assembly 21 leave the locking groove 12 and open the locking area 13, so that the external lock head can leave the locking area 13.

[0070] The locking mechanism 2 is locked when the locking part 251 is inserted into the locking groove 12, thereby restricting the external lock head within the locking area 13; the locking part 251 is removed from the locking groove 12 by moving the pin assembly 21, thereby opening the locking area 13, and the external lock head is no longer restricted within the locking area 13, allowing it to disengage from the locking groove 12. At this time, the locking mechanism 2 is unlocked.

[0071] The locking device can be used alone to lock the external lock head, which is existing technology and very common in daily life, such as the latches installed on doors or windows. The structure of the external lock head can refer to a folding door latch disclosed in Chinese Patent CN201821688426.0, in which the lock nose is placed in the locking groove 12 and the locking part 251 is inserted into the hole between the lock nose bottom plate and the lock nose to achieve locking, thereby avoiding safety problems caused by children accidentally opening doors and windows.

[0072] Locking mechanism 2 also includes:

[0073] The second elastic element 23, which is a spring, disc spring, or sheet spring, is installed inside the locking seat 11. The two ends of the second elastic element 23 abut against the inner wall of the locking seat 11 and the rear end of the locking element 22, respectively. This is used to make the second limiting part 221 at the front end of the locking element 22 tend to move toward the side end of the pin assembly 21, so that the second limiting part 221 is placed on the moving trajectory of the first limiting part 241, thereby allowing the second limiting part 221 to abut against the first limiting part 241 to prevent the pin assembly 21 from moving and unlocking.

[0074] The elastic element 23 can also be a tension spring. The two ends of the tension spring are connected to the inner wall of the locking seat 11 and the rear end of the locking element 22, respectively. The purpose is to make the limiting part 221 move onto the moving trajectory of the limiting part 241.

[0075] The pin assembly 21 can be a single pin. The rear end of the pin assembly 21 (pin) extends out of the locking seat 11 to form a button 242, and the front end or the front half is a locking part 251. Then, the pin assembly 21 is moved by manually holding the button 242.

[0076] To facilitate the movement and unlocking of the pin assembly 21, this design includes the following:

[0077] The slider 24 is slidably disposed within the locking seat 11, and the rear end of the slider 24 extends out of the locking seat 11 to form a button 242. The side end of the slider 24 has a limiting part 241.

[0078] The locking pin 25 has its rear end connected to the front end of the sliding member 24. It achieves snap-fit ​​or adhesive connection through slotting and block opening, and the front half of the locking pin 25 forms the locking part 251 described above.

[0079] The elastic element 26 is a spring or disc spring, which is sleeved on the locking pin 25. The two ends of the elastic element 26 are respectively connected to the front end of the sliding element 24 and the locking seat 11, so as to make the locking part 251 tend to move away from the locking groove 12 and open the locking area 13.

[0080] The side wall of the locking groove 12 has a through hole 14 that connects its inner and outer sides. The locking part 251 is inserted into the locking groove 12 through the through hole 14. One end of the elastic member 26 abuts against the edge of the through hole 14, and the other end abuts against the sliding member 24.

[0081] When the movable locking member 22 (elastic member 23 undergoes elastic deformation) causes the limiting part 221 to no longer be located on the moving trajectory of the limiting part 241, the elastic member 26 undergoes elastic deformation to drive the sliding member 24 to move. The sliding member 24 drives the locking pin 25 to move and causes the locking part 251 of the locking pin 25 to leave the locking groove 12, thereby unlocking the locking area 13.

[0082] When the sliding member 24 is pressed to lock the pin assembly 21, the sliding member 24 moves and causes the elastic member 1 26 to deform elastically and compress. At this time, the locking part 251 is inserted into the locking groove 12 to lock the locking area 13. The elastic member 23 deforms elastically to make the locking member 22 move automatically toward the pin assembly 21, so that the limiting part 221 is located on the movement trajectory of the limiting part 1 241, thereby locking the pin assembly 21 with the locking member 22.

[0083] The side end of the pin assembly 21 has a limiting part 3 243, which cooperates with the limiting part 1 241 and the side wall of the pin assembly 21 to form a limiting groove 1 244. The front end of the locking member 22 has a limiting groove 222.

[0084] When the front end of the locking member 22 moves toward the side end of the pin assembly 21, the second limiting part 221 is inserted into the first limiting groove 244 and abuts against the inner wall of the first limiting groove 244, and the third limiting part 243 is inserted into the second limiting groove 222 and abuts against the side wall of the second limiting groove 222, thereby restricting the movement and unlocking of the pin assembly 21 and ensuring the stability of the locked state of the pin assembly 21.

[0085] The limiting mechanism 3 includes at least:

[0086] The limiting member 31 is slidably disposed within the locking seat 11, and the limiting member 31 extends out of the locking seat 11 to form a push button 32. The surface of the push button 32 is provided with anti-slip protrusions or anti-slip strips.

[0087] By pushing the limiting member 31 toward the locking member 22, the limiting member 31 is placed on the movement trajectory of the locking member 22, so that the end of the limiting member 31 moves against the rear end of the locking member 22, preventing the locking member 22 from moving away from the pin assembly 21 and causing the pin assembly 21 to unlock. This restricts the second limiting part 221 from moving away from the first limiting part 241, ensuring that the locking member 22 is in the locked state, so that the pin assembly 21 is also in the locked state.

[0088] To facilitate the automatic movement of the limiting member 31 to achieve the locking of the limiting mechanism 3, the limiting mechanism 3 further includes an elastic member 34, which is a spring or disc spring, with its two ends connected to the side end of the limiting member 31 and the inner wall of the locking seat 11, respectively. This is used to make the limiting member 31 tend to move towards the locking member 22, so that the end of the limiting member 31 can abut against the rear end of the locking member 22, thereby preventing the locking member 22 from moving and unlocking.

[0089] The locking seat 11 includes a housing 15 and a cover 16 connected to each other. The housing 15 is provided with a mounting groove 151, and the mounting groove 151 is provided with a first notch 152, a second notch 153, and a third notch 154. The first notch 152 is used to avoid the push button 223 on the locking member 22, the second notch 153 is used to avoid the push button 32 of the limiting member 31 of the limiting mechanism 3, and the third notch 154 is used to avoid the button 242 of the sliding member 24 of the pin assembly 21. The cover 16 is provided with a first slider 161 and a second slider 162. The locking member 22 is provided with a first sliding groove 224 that slides with the first slider 161, and the limiting member 31 of the limiting mechanism 3 is provided with a second sliding groove 33 that slides with the second slider 162. The locking seat 11 is provided with a sliding groove for the sliding member 24 to slide.

[0090] When locking, first press the sliding member 24 to lock the pin assembly 21 to the locking groove 12, then move the locking member 22 to lock the sliding member 24 of the pin assembly 21, and finally move the limiting member 31 to lock the locking member 22. To unlock, simply reverse the operation.

[0091] See Figure 1 , Figure 2 , Figure 7 and Figure 8 A safety lock, comprising:

[0092] The locking device 1;

[0093] Fixing device 4, which is used to install on the object to be installed;

[0094] The connector 5 has one end movably connected to the fixing device 4, and the other end is placed in the locking groove 12 of the locking device 1 and locked in the locking area 13 by the locking part 251. The end of the connector 5 is not restricted by the locking device 1 by the unlocking operation of the locking device 1.

[0095] The safety lock can be installed on cabinet doors, sliding windows, push windows, and other places where it is necessary to prevent children from accidentally opening it. It does not require the use of a key or password to unlock, making it convenient for users. The locking device 1 and the fixing device 4 are installed on the two moving parts of the object to be installed. The object to be installed can be a cabinet door and cabinet side wall, a window and window frame, a sliding door and wall, etc.

[0096] The fixing device 4 includes:

[0097] Mounting bracket 41, which is used for mounting on the object to be installed;

[0098] The rotating part 42 is hinged to the fixed base 41, and the rotating part 42 is provided with a connecting groove 421;

[0099] The fixing pin 43 has its two ends fixed to the rotating part 42, and the middle part of the fixing pin 43 is placed in the connecting groove 421 and is movably connected to one end of the connecting part 5.

[0100] The rotating part 42 is mounted on the connecting part 5, so that the end of the connecting part 5 can rotate on the fixing pin 43, and the rotating part 42 can also rotate on the fixing seat 41.

[0101] The connector 5 is a chain, a connecting belt, or a rope, and the connector 5 is provided with at least one connecting hole 51. The connecting hole 51 is used for the insertion of the locking part 251. When there are multiple connecting holes 51, the connecting holes 51 are evenly distributed along the length direction of the connector 5.

[0102] Both the fixed base 41 and the locking base 11 are provided with mounting holes 6. Screws, bolts or pins are passed through the mounting holes 6 and connected to the surface of the object to be installed, so that both the fixed base 41 and the locking base 11 are installed on the surface of the object to be installed.

[0103] Alternatively, adhesive layers are provided on the rear end faces of both the fixing seat 41 and the locking seat 11, so that both the fixing seat 41 and the locking seat 11 can be installed onto the surface of the object to be installed by means of adhesion.

[0104] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

[0105] It should be noted that the structures, proportions, and sizes depicted in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation of this technical solution and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this technical solution, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity and not intended to limit the scope of implementation of this technical solution. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the technical solution's implementation.

[0106] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0107] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A locking device, characterized in that The locking device comprises: a locking seat (11) provided with a locking groove (12); a locking mechanism (2) installed in the locking seat (11), and a locking portion (251) of the locking mechanism (2) is inserted into the locking groove (12) and forms a locking area (13) for locking an external lock head; a limiting mechanism (3) installed on the locking seat (11) for limiting unlocking of the locking mechanism (2). The locking mechanism (2) at least comprises: a pin shaft assembly (21) slidingly arranged in the locking seat (11), and a locking portion (251) of the pin shaft assembly (21) cooperates with the locking groove (12) to form the locking area (13), and a side end of the pin shaft assembly (21) is provided with a limiting portion one (241); a locking piece (22) slidingly arranged in the locking seat (11), and a part of the locking piece (22) extends out of the locking seat (11) to form a push button two (223), the limiting mechanism (3) is in active abutment with the locking piece (22), and the locking piece (22) is provided with a limiting portion two (221); the limiting portion two (221) is in active abutment with the limiting portion one (241), for limiting unlocking movement of the pin shaft assembly (21), so as to realize locking of the external lock head in the locking area (13).

2. The locking device according to claim 1, wherein: the locking mechanism (2) further comprises: a resilient piece two (23) installed in the locking seat (11), and two ends of the resilient piece two (23) are connected with an inner wall of the locking seat (11) and a rear end of the locking piece (22) respectively, for enabling the limiting portion two (221) at a front end of the locking piece (22) to have a tendency of moving towards a side end of the pin shaft assembly (21), so as to realize that the limiting portion two (221) is located on a movement track of the limiting portion one (241).

3. The locking device according to claim 1, wherein: the pin shaft assembly (21) comprises: a sliding piece (24) slidingly arranged in the locking seat (11), and a rear end of the sliding piece (24) extends out of the locking seat (11) to form a button (242), and a side end of the sliding piece (24) has the limiting portion one (241); a locking pin (25) having a front half provided with the locking portion (251) and a rear end connected with a front end of the sliding piece (24); a resilient piece one (26) sleeved on the locking pin (25), and two ends of the resilient piece one (26) are connected with the front end of the sliding piece (24) and the locking seat (11) respectively, for enabling the locking portion (251) to have a tendency of moving away from the locking groove (12) and opening the locking area (13); wherein, a side wall of the locking groove (12) has a through hole (14) communicating between the inside and outside of the locking groove (12), and the locking portion (251) is inserted into the locking groove (12) through the through hole (14).

4. The locking device according to any one of claims 1-3, wherein: The side end of the pin shaft assembly (21) has a limiting part three (243), which cooperates with the limiting part one (241) and the side wall of the pin shaft assembly (21) to form a limiting groove one (244), and the front end of the locking piece (22) has a limiting groove two (222); When the front end of the locking piece (22) moves towards the side end of the pin shaft assembly (21), the limiting part two (221) is inserted into the limiting groove one (244), and the limiting part three (243) is inserted into the limiting groove two (222), so as to achieve the unlocking of the limiting movement of the pin shaft assembly (21).

5. The locking device according to any one of claims 1-3, characterized in that: The limiting mechanism (3) at least comprises: A limiting piece (31) is slidingly arranged in the locking seat (11), and part of the limiting piece (31) extends out of the locking seat (11) and forms a push button one (32); By pushing the limiting piece (31) to move towards the locking piece (22), the limiting piece (31) is placed on the movement track of the locking piece (22), so that the end of the limiting piece (31) movably abuts against the rear end of the locking piece (22), thereby limiting the movement of the limiting part two (221) out of the movement track of the limiting part one (241).

6. The locking device according to claim 5, characterized in that: The limiting mechanism (3) further comprises: A resilient piece three (34) is connected to the limiting piece (31) and the locking seat (11) at two ends, respectively, for enabling the limiting piece (31) to have a tendency to move towards the locking piece (22).

7. The locking device according to any one of claims 1, 2, 3 or 6, characterized in that: The locking seat (11) comprises a housing (15) and a cover (16) connected to each other, the housing (15) is provided with a mounting groove (151), and the mounting groove (151) is provided with a notch one (152), a notch two (153) and a notch three (154); the notch one (152) is used for avoiding the push button two (223) on the locking piece (22), the notch two (153) is used for avoiding the push button one (32) of the limiting piece (31) of the limiting mechanism (3), and the notch three (154) is used for avoiding the button (242) of the sliding piece (24) of the pin shaft assembly (21); the cover (16) is provided with a sliding block one (161) and a sliding block two (162), the locking piece (22) is provided with a sliding groove one (224) slidingly matched with the sliding block one (161), and the limiting piece (31) of the limiting mechanism (3) is provided with a sliding groove two (33) slidingly matched with the sliding block two (162).

8. A safety lock characterized by It comprises: The locking device (1) according to any one of claims 1-7; A fixing device (4) for being mounted on an object to be mounted; A connecting piece (5) is movably connected to the fixing device (4) at one end and is placed in the locking groove (12) of the locking device (1) at the other end and is locked in the locking area (13) by the locking part (251); The fixing device (4) comprises: A fixing seat (41) is used for being mounted on an object to be mounted; A rotating piece (42) is hinged to the fixing seat (41), and a connecting groove (421) is arranged on the rotating piece (42); A fixing pin (43) is arranged at both ends of the rotating piece (42), and a middle part of the fixing pin (43) is placed in the connecting groove (421) and is movably connected to one end of the connecting piece (5).

9. The safety lock according to claim 8, characterized in that: The connecting piece (5) is a chain or a connecting belt or a rope, and at least one connecting hole (51) is arranged on the connecting piece (5) for the insertion of the locking part (251).

10. The safety lock according to claim 8 or 9, characterized in that: Mounting holes (6) are arranged on the fixing seat (41) and the locking seat (11); Alternatively, an adhesive layer is arranged on the rear end faces of the fixing seat (41) and the locking seat (11).

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