CN114052341A

CN114052341A - Double safety lock device

Info

Publication number: CN114052341A
Application number: CN202110078301.6A
Authority: CN
Inventors: 李邱宗
Original assignee: Lian Yang Plastic Shenzhen Co Ltd
Current assignee: Lian Yang Plastic Shenzhen Co Ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2022-02-18

Abstract

A double-safety lock device comprises an unlocking key arranged on a safety buckle and a lock catch assembly arranged in the safety buckle and linked with the unlocking key, wherein a second lock key is arranged on the unlocking key and has a first position state and a second position state; in the first position state, the second lock key prevents the unlocking key from moving, so that the lock catch assembly keeps a locking state; in the second position state, the unlocking key can move to link the locking and buckling component for unlocking. According to the double-safety lock device, the second lock button is added on the existing unlocking button, when unlocking is carried out, the second lock button is operated firstly to remove the limitation on the unlocking button, then further unlocking can be carried out, and the direction of operating the second lock button is different from the unlocking direction during unlocking, so that misoperation during accidental touch can be avoided, and accidental unlocking is avoided. The double-safety lock device can greatly improve the safety, has strong practicability and is suitable for being widely popularized.

Description

Double safety lock device

[ technical field ] A method for producing a semiconductor device

The invention relates to a safety buckle, in particular to a double safety lock device.

[ background of the invention ]

Some components of child products such as strollers, child safety seats, and infant carriers are usually connected or maintained in a certain state by a safety buckle, for example, the infant carrier needs to be connected and also needs to be disconnected, which can be connected in a variable state by the safety buckle. The safety buckle generally comprises a female buckle and a male buckle, wherein the female buckle is provided with a lock hole, the male buckle is provided with a lock tongue, and the male buckle and the female buckle can be connected together when the lock tongue is inserted into the lock hole; when the lock needs to be unlocked, the male buckle can be released by pressing or pushing the unlocking key on the female buckle, so that the lock tongue can be withdrawn from the lock hole of the female buckle.

The existing safety buckles generally operate the unlocking key directly to unlock, for example, push the unlocking key directly or press the unlocking key to unlock. In actual use, the unlocking key is touched carelessly sometimes to cause accidental unlocking, so that potential safety hazards are caused. In addition, the safety buttons are used for children, and children often poke the safety buttons for curiosity, and sometimes accidentally push the unlocking button to separate the female button from the male button. Therefore, the existing safety buckle is very direct in unlocking mode, easy to unlock and easy to cause accidental unlocking, so that potential safety hazards exist.

[ summary of the invention ]

The present invention is directed to solve the above problems, and to provide a dual security lock device capable of preventing a malfunction and improving security.

In order to solve the problems, the invention provides a double-safety lock device which comprises an unlocking key arranged on a safety buckle and a lock catch assembly arranged in the safety buckle and linked by the unlocking key, and is characterized in that a second lock key is arranged on the unlocking key and has a first position state and a second position state; in the first position state, the second lock key prevents the unlocking key from moving, so that the lock catch assembly keeps a locking state; in the second position state, the unlocking key can move to be linked with the locking component for unlocking.

Furthermore, the second lock button moves from the first position state to the second position state in an operation direction different from the direction in which the unlocking button is operated to link the lock catch component for unlocking.

Furthermore, a fixing part which is not linked with the unlocking key and the second lock key is arranged in the safety buckle, and the locking buckle assembly is provided with a linkage part which is linked with the unlocking key and/or the second lock key; the second lock key comprises a first blocking part, a second blocking part and an operating part; in the first position, the second blocking part is over against the unlocking key, and the first blocking part is over against the fixing part to prevent the unlocking key from moving to an unlocking position towards the direction of the fixing part; when the operation part is operated to enable the second lock key to move along the first direction X, the first blocking part and the fixing part are staggered to remove the movement limitation of the unlocking key, and when the unlocking key or the second lock key is pressed towards the direction of the fixing part, the unlocking key and/or the second lock key push the linkage part to unlock.

Further, the first direction X is perpendicular to the direction in which the unlocking key moves for unlocking.

Furthermore, the unlocking key is provided with an accommodating cavity and a key hole, the key hole is communicated with the accommodating cavity, a first blocking part and a second blocking part of the second lock key are arranged in the accommodating cavity, the second blocking part is attached to the inner wall of the accommodating cavity, and the operation part is arranged in the key hole and can move in the key hole along the first direction X.

Furthermore, the second lock key further comprises a first elastic part, one end of the first elastic part is connected with the first blocking part, and the other end of the first elastic part is abutted against the inner wall of the accommodating cavity.

Furthermore, the elastic direction of the first elastic part is perpendicular to the direction of the unlocking key for moving and unlocking.

Furthermore, the operating part is connected with the second blocking part, the operating part and the first blocking part are respectively positioned at two opposite sides of the second blocking part, and the operating part extends out of the accommodating cavity from the inside of the accommodating cavity through the key hole.

Furthermore, a first limit groove is formed between the operating part and the second blocking part.

Furthermore, the second lock device further comprises a receiving part, the receiving part is spaced from the first blocking part, and a stroke groove for inserting the fixing part is formed between the receiving part and the first blocking part.

Furthermore, the lock catch assembly further comprises a second elastic part, a third elastic part and a lock hole enclosing part, wherein the second elastic part is respectively arranged at two sides of the linkage part and connected with the linkage part; the third elastic parts are respectively arranged at the inner sides of the second elastic parts and connected with the second elastic parts, and the elastic direction of the third elastic parts is different from that of the second elastic parts; the lock hole enclosing parts are respectively arranged on the end parts of the third elastic parts, and a lock hole with adjustable size is enclosed between the lock hole enclosing parts.

Furthermore, the linkage part comprises a first linkage part and a second linkage part which are arranged at intervals, a stroke restriction groove is formed between the first linkage part and the second linkage part, and the fixing part is arranged in the stroke restriction groove.

Furthermore, a first extrusion surface is arranged on the second elastic part, and a second extrusion surface is arranged on the lockhole surrounding part; when the second elastic part is pressed to deform, the first extrusion surface can extrude the second extrusion surface to push the lock hole enclosing part, so that the lock hole is expanded.

The present invention advantageously contributes to effectively solving the above-mentioned problems. According to the double-safety lock device, the second lock button is added on the existing unlocking button, when unlocking is carried out, the second lock button is operated firstly to remove the limitation on the unlocking button, then further unlocking can be carried out, and the direction of operating the second lock button is different from the unlocking direction during unlocking, so that misoperation during accidental touch can be avoided, and accidental unlocking is avoided. The double-safety lock device can greatly improve the safety, has strong practicability and is suitable for being widely popularized.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure.

Fig. 2 is an exploded view of the structure.

Fig. 3 is a schematic view of a first position state.

Fig. 4 is a schematic view of a second position state.

FIG. 5 is a schematic view of an unlock button, a second pass lock button, and a latch assembly.

Fig. 6 is a schematic structural diagram of a second lock button.

Fig. 7 is a schematic structural diagram of the unlock button.

Fig. 8 is a schematic structural view of the latch unit.

The attached drawings are as follows: the unlocking key comprises an unlocking key 10, an accommodating cavity 11, a key hole 12, an open end 13, a pressing end 14, an embedding groove 15, a lug part 16, a second limiting groove 17, a second locking key 20, a first blocking part 21, a second blocking part 22, an operating part 23, a first limiting groove 24, a first elastic part 25, a stroke groove 26, a bearing part 27, a fixing part 30, a locking component 40, a linkage part 41, a first linkage part 411, a second linkage part 412, a connecting part 413, a stroke restriction groove 414, a first step 415, a second step 416, a third step 417, a second elastic part 42, a third elastic part 43, a locking hole surrounding part 44, a locking hole 45, a locking unit 46, a first extrusion surface 47, a second extrusion surface 48, a shell 50 and an abutting part 51.

[ detailed description ] embodiments

The following examples are further illustrative and supplementary to the present invention and do not limit the present invention in any way.

The key point of the invention is that as shown in fig. 1, the safety buckle is provided with an unlocking key 10, the unlocking key 10 is provided with a second lock key 20, when unlocking is required, the unlocking can be further performed after the second lock key 20 is operated, and the unlocking direction of the second lock key 20 is different from the unlocking direction of the unlocking key 10, so that the unlocking by misoperation can be avoided, and the safety of the safety buckle is improved.

As shown in fig. 3 and 4, the second lock button 20 is movable and has a first position state and a second position state. In the first position (as shown in fig. 3), the second lock button 20 prevents the unlocking button 10 from moving, so that the locking assembly 40 for locking in the buckle remains in the locked state, and cannot be unlocked directly by operating the unlocking button 10. In the second position (as shown in fig. 4), the second lock button 20 releases the movement of the unlock button 10, and the unlock button 10 can move, and at this time, the unlock button 10 or the second lock button 20 can be operated to unlock. Therefore, when the unlocking key 10 is operated, the second lock key 20 is operated first to release the restriction on the unlocking key 10, and then the unlocking key is operated further.

As shown in fig. 2, 3, 4 and 5, a fixing portion 30 is provided in the safety buckle, and the fixing portion 30 is not linked with the unlock button 10 and the second lock button 20, and belongs to a fixing portion. The second lock button 20 is provided with a first blocking portion 21. In the first position, the first blocking portion 21 faces the fixing portion 30. In some embodiments, the first blocking portion 21 may be directly in contact with the fixing portion 30. In some embodiments, the first blocking portion 21 may be spaced from the fixing portion 30 by a distance smaller than a stroke of movement required for the unlocking key 10 to operate for unlocking. In other words, even if the unlocking key 10 is directly pressed to drive the second lock key 20 to move toward the fixing portion 30 or the second lock key 20 is directly pressed, the moving stroke of the second lock key 20 is limited, and the unlocking cannot be realized. In this embodiment, the first blocking portion 21 is spaced from the fixing portion 30 by a certain distance. The fixing portion 30 is opposite to the first blocking portion 21, and can prevent the first blocking portion 21 from moving towards the fixing portion 30, so that the second lock button 20 can prevent the unlocking button 10 from moving towards the fixing portion 30, the locking assembly 40 is kept in a locking state, only when the first blocking portion 21 and the fixing portion 30 are staggered, the second lock button 20 can smoothly move towards the fixing portion 30, and unlocking can be performed through the unlocking button 10.

As shown in fig. 2, fig. 3, fig. 4, and fig. 5, the second lock key 20 is further provided with a second blocking portion 22, and the second blocking portion 22 is opposite to the unlock key 10. In this embodiment, the second blocking portion 22 contacts the unlocking key 10. The second blocking portion 22 is disposed to limit the movement of the unlocking button 10, and on the one hand, the second blocking portion can also be moved synchronously by the unlocking button 10 in conjunction with the second locking button 20. When the second locking button 20 is in the first position, the second blocking portion 22 is sandwiched between the locking assembly 40 and the unlocking button 10. Since the second locking key 20 cannot move to the unlocking position toward the fixing portion 30 due to the first blocking portion abutting against the fixing portion 30, the second blocking portion 22 cannot move toward the fixing portion 30, and the unlocking key 10 is limited and cannot move to the unlocking position toward the fixing portion 30, that is, cannot move to the unlocking direction for unlocking, so that the locking assembly 40 cannot be interlocked for unlocking to maintain the locking state.

As shown in fig. 2, 3, 4 and 5, the first blocking portion 21 abuts against the fixing portion 30, and the second blocking portion 22 abuts against the unlocking button 10, so that the second locking button 20 and the unlocking button 10 cannot move towards the fixing portion 30 to unlock, and the safety buckle maintains a locked state. In the present invention, the direction moving towards the fixing portion 30 is the unlocking direction Y of the safety buckle, i.e. the direction of the linked locking assembly 40 releasing the lock tongue.

As shown in fig. 2, 3, 4 and 5, the second-lock button 20 is provided with an operation portion 23, and the operation portion 23 is operated by a user to push and move the second-lock button 20. Correspondingly, the unlocking key 10 is provided with an accommodating cavity 11 and a key hole 12. The operation portion 23 is disposed in the key hole 12, one end of the operation portion is connected to the second blocking portion 22 disposed in the accommodating cavity 11, and the other end of the operation portion passes through the key hole 12 and is located outside the accommodating cavity 11, so as to be exposed for user operation. The operating portion 23 is movable in the first direction X in the key hole 12, and the moving direction is the direction in which the second lock key 20 unlocks the unlock key 10. The first direction X is different from the unlocking direction Y of the safety buckle. In this embodiment, the first direction X is perpendicular to the unlocking direction Y of the safety buckle. In other words, the moving direction of the second lock button 20 in the button hole 12 is perpendicular to the moving direction of the unlock button 10.

Further, as shown in fig. 2, 3, 4 and 5, a first limit groove 24 is formed between the operating portion 23 and the second blocking portion 22. The first limiting groove 24 is arranged, so that the second blocking portion 22 and the operating portion 23 are clamped at two sides of the housing of the unlocking key 10, and thus, the functions of restraining and limiting can be achieved. The first limiting groove 24 can restrict the second lock key 20 to move along the first direction X, and can make the second lock key 20 and the unlock key 10 form linkage to synchronously move towards the unlock direction Y.

As shown in fig. 2, 3, 4 and 5, in order to facilitate resetting after unlocking, the second lock button 20 is provided with a first elastic portion 25. One end of the first elastic part 25 is connected to the first blocking part 21, and the other end thereof is abutted to the inner wall of the accommodating cavity 11. The elastic direction of the first elastic portion 25 is the same as the first direction X, and is perpendicular to the direction Y in which the unlocking key 10 is moved to unlock. When the operating portion 23 is pushed in the first direction X, the first elastic portion 25 is pressed to store force; when the external force is lost, the elastic force of the first elastic part 25 urges the second lock button 20 to be reset.

For the convenience of unlocking, as shown in fig. 2, 3, 4, 5 and 6, the second lock button 20 is further provided with a stroke slot 26 into which the fixing portion 30 can be inserted. The second lock button 20 is provided with a receiving portion 27, the receiving portion 27 is spaced apart from the first blocking portion 21, and the stroke groove 26 is formed therebetween. In the first position, the first blocking portion 21 is opposite to the fixing portion 30, and the fixing portion 30 is staggered from the stroke groove 26. When the pushing operation part 23 moves along the first direction X to the second position, the first blocking part 21 is staggered with the fixing part 30, the fixing part 30 is opposite to the stroke slot 26, at this time, the second lock key 20 or the unlock key 10 is pushed along the direction of the fixing part 30, the fixing part 30 can be inserted into the stroke slot 26, and thus the stroke slot 26 can restrict the second lock key 20 to move along a straight line, so as to ensure smooth unlocking operation.

When the second lock button 20 is in the second position (as shown in fig. 4), the first blocking portion 21 is offset from the fixing portion 30, and then corresponds to the linking portion 41 of the locking assembly 40. When the operating portion 23 or the unlocking button 10 is pressed in the unlocking direction Y (i.e., pushed in the direction of the fixing portion 30), the first blocking portion 21 and the receiving portion 27 can push the locking assembly 40, so as to interlock the locking assembly 40 for unlocking.

As shown in fig. 3, 4 and 8, the latch assembly 40 includes a linking portion 41, a second elastic portion 42, a third elastic portion 43 and a latch hole enclosing portion 44. The interlocking part 41 is in contact with the second lock button 20 and is used to receive the pushing force from the second lock button 20. The second elastic portions 42 are respectively disposed at both sides of the interlocking portion 41 and connected to the interlocking portion 41. The second elastic portion 42 and the linking portion 41 are enclosed to form a ring shape. The third elastic portions 43 are respectively disposed inside the second elastic portions 42 and connected to the second elastic portions 42. The third elastic portion 43 has an elastic direction different from that of the second elastic portion 42. The lock hole enclosing parts 44 are respectively arranged on the end parts of the third elastic parts 43, and lock holes 45 are enclosed between the lock hole enclosing parts 44. The locking hole 45 can be matched with a lock tongue on the male buckle. The second elastic portion 42 and the third elastic portion 43 have elasticity, so that the size of the locking hole 45 can be changed. When the second lock button 20 is in the first position state, the lock hole 45 is in the minimum state, and at this time, when the lock tongue is inserted toward the lock hole 45, the lock tongue can press the lock hole surrounding portion 44 to enter the lock hole 45, and the lock tongue is clamped by the lock hole surrounding portion 44 and cannot exit, so that locking is achieved. When the operating portion 23 is pushed in the first direction X to make the second lock button 20 in the second position state, the second lock button 20 or the unlock button 10 is pressed in the direction of the fixing portion 30, the linking portion 41 is pressed to move, at this time, the second elastic portion 42 and the third elastic portion 43 are pressed to deform, so that the lock hole 45 is enlarged, and at this time, the lock tongue can be withdrawn from the lock hole 45 to unlock.

For the dual security lock device of the present invention, as shown in fig. 1, when unlocking, the second lock key 20 needs to be pushed along the first direction X, the movement restriction on the unlocking key 10 is removed, and then the unlocking key 10 or the operation portion 23 is pressed along the direction of the fixing portion 30, i.e. the unlocking direction Y, so as to achieve unlocking. Because the unlocking operation has two steps, and the operation directions of the two steps are different, the unlocking operation has a strong false start prevention effect, the phenomenon of accidental unlocking can be avoided, and the safety of the safety buckle is enhanced.

To describe the structure of the present invention more specifically, the following description will be given with reference to specific examples.

Example 1

As shown in fig. 6, the second lock button 20 includes an operating portion 23, a first blocking portion 21, a second blocking portion 22, a receiving portion 27, and a first elastic portion 25, which are integrally formed.

As shown in fig. 6, the second blocking portion 22 and the first blocking portion 21 are both block-shaped, and the first blocking portion 21 is perpendicular to the second blocking portion 22. The first stopper 21 is located at a position more central than the second stopper 22. The end of the first blocking portion 21 is enlarged to facilitate abutting, so as to support the fixing portion 30 and push the locking assembly 40.

As shown in fig. 6, the first elastic portion 25 has a wave shape and thus has a certain elasticity. One end of the first elastic part 25 is connected with the middle part of the first blocking part 21, and the other end thereof is a free end and is abutted against the inner wall of the accommodating cavity 11 of the unlocking key 10.

As shown in fig. 6, the receiving portion 27 is connected to an end of the second stopper 22, and forms the stroke groove 26 in parallel with and spaced apart from the first stopper 21. The receiving portion 27 has a thickness smaller than that of the first stopper 21, a side surface flush with a surface of the first stopper 21, and another side surface lower than that of the first stopper 21, and allows the interlocking portion 41 of the latch assembly 40 to partially overlap thereon, thereby being pushed.

As shown in fig. 6, the operating portion 23 is disposed on the other side of the second blocking portion 22 opposite to the first blocking portion 21, and has an L-shaped overall shape, one end of which is connected to the middle of the operating portion 23, and the other end of which extends to the outside of the unlock button 10 for operation. The protruding end of the operating portion 23 and the second blocking portion 22 are spaced apart to form the first stopper groove 24.

As shown in fig. 7, the unlocking button 10 is in the form of a cap with an open end 13 facing the locking assembly 40 and the other end extending out of the safety buckle to form a pressing end 14. The inside of the unlocking key 10 forms the accommodating cavity 11. The key hole 12 is formed in the pressing end 14 of the unlocking key 10, and the key hole 12 is communicated with the accommodating cavity 11. In this embodiment, the key hole 12 is centrally disposed. In addition, an insertion groove 15 may be further provided in the pressing end 14, and the insertion groove 15 communicates with the key hole 12, has a shape matching the movement stroke of the operation portion 23, and restricts the movement of the operation portion 23. In addition, lug parts 16 are respectively arranged at two ends of the open end 13 of the unlocking button 10, and are used for mounting the unlocking button 10 and preventing the unlocking button 10 from being separated from the safety buckle. Further, in order to restrict the unlocking key 10 to move along a straight line, a second limiting groove 17 is arranged on the unlocking key 10. The second limiting groove 17 is opposite to the fixing portion 30, and the size of the second limiting groove is matched with that of the fixing portion 30. When the unlocking key 10 is pressed along the fixing portion 30 direction, i.e., the unlocking direction Y, the fixing portion 30 may be inserted into the second limiting groove 17, so that the fixing portion 30 may restrict the unlocking key 10 from moving along a straight line.

In this embodiment, as shown in fig. 1, two unlocking buttons 10 are symmetrically disposed on the safety buckle and used for pressing in opposite directions.

As shown in fig. 2, the locking assembly 40 includes two locking units 46 designed in half, and each locking unit 46 includes an integrally formed linkage portion 41, a second elastic portion 42, a third elastic portion 43, and a locking hole enclosing portion 44.

As shown in fig. 8, the linkage portion 41 includes a first linkage portion 411, a second linkage portion 412, and a connection portion 413 connected between the first linkage portion 411 and the second linkage portion 412. The connecting portion 413 is connected to the ends of the first and second linking

portions

411 and 412, and extends out of the ends of the first and second linking

portions

411 and 412 to overlap the first and second blocking portions 21 and receiving portions 27 of the second lock button 20.

As shown in fig. 8, the first and second linking

portions

411 and 412 are spaced apart from each other to form a stroke restriction groove 414 therebetween, the fixing portion 30 is located in the stroke restriction groove 414, and the fixing portion 30 can restrict the moving direction of the locking assembly 40.

As shown in fig. 8, a first step 415 is formed between the end surface of the first linking part 411 and the surface of the connecting part 413; the first blocking portion 21 of the second lock button 20 overlaps the first step 415. When the second lock button 20 is in the first position, the first blocking portion 21 faces the stroke restriction slot 414, i.e. faces the fixing portion 30; when the second lock button 20 is in the second position, the end of the first blocking portion 21 abuts against the end surface of the first linking portion 411, so that the second lock button 20 can push the first linking portion 411 through the first blocking portion 21.

As shown in fig. 8, a second step 416 is formed between the end surface of the second coupling portion 412 and the surface of the connection portion 413; the receiving portion 27 of the second lock button 20 is overlapped on the second step 416, and an end of the receiving portion 27 abuts against an end surface of the second coupling portion 412, so that the second lock button 20 can push the second coupling portion 412 through the receiving portion 27.

As shown in fig. 8, the first blocking portion 21 and the receiving portion 27 push the first linkage portion 411 and the second linkage portion 412 respectively, so that the pushing force is more uniform, and the latch assembly 40 is more easily deformed to unlock.

As shown in fig. 8, the first step 415 and the second step 416 are at different heights, so that a third step 417 is formed between the first step 415 and the second step 416, and the third step 417 may abut against the first blocking portion 21. In the first position, the first stopper 21 abuts against the third step 417. In the second position, the first stopper 21 is spaced apart from the third step 417. When the first elastic portion 25 is reset to push the first blocking portion 21 to reset, the first blocking portion 21 is reset to the position when abutting against the third step 417.

As shown in fig. 8, each of the latch units 46 is provided with two second elastic parts 42. The second elastic parts 42 are symmetrically distributed at the outer sides of the first linking part 411 and the second linking part 412, and are integrally formed with the linking part 41. The second elastic portion 42 has a curved long arm shape, and thus has elasticity and is deformable by pressure.

As shown in fig. 8, each of the locking hole 45 units is provided with two third elastic parts 43. The third elastic portions 43 are connected between the end portions of the second elastic portions 42 and the lock hole enclosing portions 44, respectively. In this embodiment, the third elastic portion 43 is wavy, so that it has elasticity and can be elastically deformed.

As shown in fig. 8, the elastic directions of the second elastic part 42 and the third elastic part 43 are different, wherein the elastic direction of the third elastic part 43 is perpendicular to the direction of the stroke restriction groove 414.

As shown in fig. 8, each of the locking holes 45 is provided with two locking hole enclosing portions 44, one end of each of the locking hole enclosing portions 44 is connected to the end of the third elastic portion 43, and the other end thereof is a free end. As shown in fig. 2 and 3, the locking assembly 40 has 4 locking hole enclosing portions 44, and the 4 locking hole enclosing portions 44 enclose a locking hole 45 with a circular outline. In order to facilitate the bolt to be squeezed into the lock hole 45, one side of each lock hole enclosing part 44, which faces the bolt insertion, is respectively set to be wedge-shaped and is in a necking shape, so that the bolt is favorably squeezed into the lock hole 45 and is clamped by the lock hole enclosing part 44.

Therefore, as shown in fig. 3, in order to adjust the size of the lock hole 45 by pushing the lock hole enclosing portion 44 to move, the lock hole enclosing portion 44 and the second elastic portion 42 are provided with a first pressing surface 47 and a second pressing surface 48 which correspond to each other. When the second elastic portion 42 deforms, the first pressing surface 47 thereof can press the second pressing surface 48 on the keyhole enclosure portion 44, and the keyhole enclosure portion 44 is driven to move by the surface pressing, so that the keyhole 45 is enlarged, and the bolt can be conveniently released to realize unlocking.

The safety clasp also includes a housing 50 that is attached in apposition. The fixing portion 30 is provided inside the housing 50, and has a rectangular block shape. The shape of the housing 50 may be set as desired. The two opposite sides of the shell 50 are respectively provided with a key mounting hole, and the unlocking key 10 is mounted at the key mounting hole, is partially positioned in the shell 50, and is partially positioned outside the shell 50.

In order to avoid unlocking by a single key, as shown in fig. 2 and 3, an abutting portion 51 may be further disposed in the housing 50 of the safety buckle, and the abutting portions 51 are symmetrically disposed and distributed outside the locking hole 45, located between the two locking units 46, and respectively abutted against the end portions of the second elastic portions 42 of the locking units 46. When the unlocking key 10 or the second lock key 20 is pushed along the direction of the fixing portion 30, the linkage portion 41 is pushed to move inward, the end portion of the second elastic portion 42 is abutted by the abutting portion 51 to deform under pressure, so that the first pressing surface 47 can press the second pressing surface 48 of the lock hole enclosing portion 44, and drive the lock hole enclosing portion 44 to move outward, so that the lock hole 45 is expanded to unlock.

Further, a magnet may be provided in the case corresponding to the lock hole 45. The arrangement mode of the magnet is not limited, and the magnet can attract or repel the magnet on the male buckle to realize the function of quickly locking or automatically ejecting the male buckle.

Thus, the double security lock device of the present embodiment is formed: as shown in fig. 1, two sides of the housing 50 are symmetrically provided with unlocking keys 10, a second locking key 20 is arranged on the unlocking key 10, and a locking assembly 40 and a fixing portion 30 are arranged inside the housing 50; the first blocking part 21, the second blocking part 22 and the receiving part 27 of the second lock key 20 are located in the accommodating cavity 11 of the unlock key 10, and the operation part 23 passes through the key hole 12 of the unlock key 10 and extends out of the unlock key 10; the second blocking part 22 is clamped between the unlocking key 10 and the linkage part 41; in the first position, the first blocking portion 21 is opposite to the stroke restriction slot 414 and the fixing portion 30, so that the first blocking portion 21 is abutted against and cannot move to the unlocking position toward the fixing portion 30; the unlocking button 10 is supported by the second blocking portion 22, so that the unlocking button 10 cannot move to the unlocking position towards the fixing portion 30; when the unlocking is needed, the operating part 23 is pushed along the first direction X, so that the second lock key 20 moves to the second position state, at this time, the first blocking part 21 and the fixing part 30 are staggered and move to abut against the first linkage part 411, and the stroke slot 26 on the second lock key 20 is opposite to the fixing part 30; at this time, the operating portion 23 or the unlocking button 10 is pressed along the direction of the fixing portion 30 (i.e., the unlocking direction Y), and the unlocking button 10 and the second lock button 20 move towards the fixing portion 30 synchronously; since the first blocking portion 21 and the receiving portion 27 are respectively abutted against the first linking portion 411 and the second linking portion 412, the linking portions 41 of the locking assembly 40 can be pushed to move inwards and towards each other; the movement of the linkage portion 41 causes the second elastic portion 42 to deform, so that the first pressing surface 47 and the second pressing surface 48 press against each other to push the lock hole enclosing portion 44, and the lock hole enclosing portion 44 expands outwards to enlarge the lock hole 45; after the lock hole 45 is enlarged, the lock tongue can be separated from the lock hole 45 to realize unlocking; when the lock hole 45 is enlarged, the third elastic portion 43 is pressed to store power. When the external force action is lost due to the loosening operation, the elastic force of the third elastic part 43 urges the locking hole enclosing part 44 to reset, so that the locking hole 45 is restored to the default size; the elastic force of the second elastic part 42 will push the linkage part 41 to reset, and the linkage part 41 will further push the unlocking key 10 and the second lock key 20 to move in the direction away from the fixing part 30, so that the unlocking key 10 is reset to the original state, and the second lock key 20 is reset to the second position state; when the second lock button 20 is reset to the second position, the first blocking portion 21 loses the restriction of the fixing portion 30, and at this time, the second lock button 20 can be restored to the first position under the elastic force of the first elastic portion 25, so that the second lock button is completely reset and the default state when the second lock button is not unlocked is maintained.

Example 2

The basic structure of this embodiment is the same as that of embodiment 1, except that the latch assembly 40 is integrally formed, and the abutting portion 51 is not provided in the housing 50. In other words, the 2 latch units 46 in embodiment 1 are provided as an integral structure.

Example 3

The basic structure of this embodiment is the same as that of embodiment 1, except that one of the unlocking keys 10 is provided with the second-pass locking key 20, and the other unlocking key 10 is not provided with the second-pass locking key 20; when unlocking, the second lock button 20 needs to be operated to the second position state, and then the operation portion 23 or the unlock button 10 is pressed oppositely to unlock. With the structure, the unlocking can not be carried out by independently operating one unlocking key 10 or only operating the second locking key 20, so that the structure also has strong anti-misoperation effect.

While the invention has been described with reference to the above embodiments, the scope of the invention is not limited thereto, and the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the spirit of the invention.

Claims

1. A double-safety lock device comprises an unlocking button (10) arranged on a safety buckle and a lock buckle component (40) arranged in the safety buckle and linked by the unlocking button (10), and is characterized in that,

a second locking key (20) is arranged on the unlocking key (10), and the second locking key (20) has a first position state and a second position state; in the first position state, the second lock key (20) prevents the unlocking key (10) from moving, so that the lock catch assembly (40) keeps a locking state; in the second position state, the unlocking key (10) can move to be linked with the lock catch component (40) for unlocking.

2. A double security lock device according to claim 1, characterised in that the direction of operation of the second lock button (20) from the first position to the second position is different from the direction of operation of the unlocking button (10) to effect unlocking in conjunction with the locking assembly (40).

3. The dual security lock device of claim 1,

a fixing part (30) which is not linked with the unlocking key (10) and the second locking key (20) is arranged in the safety buckle, and a linkage part (41) which is linked with the unlocking key (10) and/or the second locking key (20) is arranged on the locking buckle component (40);

the second lock key (20) comprises a first blocking part (21), a second blocking part (22) and an operating part (23);

in the first position, the second blocking part (22) is over against the unlocking key (10), and the first blocking part (21) is over against the fixing part (30) to prevent the unlocking key (10) from moving to the unlocking position towards the fixing part (30);

when the operation part (23) is operated to enable the second lock key (20) to move along the first direction X, the first blocking part (21) and the fixing part (30) are staggered to release the movement limitation of the unlocking key (10), and when the unlocking key (10) or the second lock key (20) is pressed towards the direction of the fixing part (30), the unlocking key (10) and/or the second lock key (20) push the linkage part (41) to unlock.

4. The dual security lock device of claim 3,

the first direction X is perpendicular to the direction of moving and unlocking the unlocking key (10).

5. The dual security lock device as claimed in claim 3, wherein the unlocking button (10) has an accommodating cavity (11) and a button hole (12), the button hole (12) is communicated with the accommodating cavity (11), the first blocking portion (21) and the second blocking portion (22) of the second locking button (20) are disposed in the accommodating cavity (11), the second blocking portion (22) is attached to the inner wall of the accommodating cavity (11), and the operating portion (23) is disposed in the button hole (12) and can move in the button hole (12) along the first direction X.

6. A double security lock device according to claim 5, characterised in that said second lock button (20) further comprises a first resilient portion (25), one end of said first resilient portion (25) being connected to said first blocking portion (21) and the other end abutting against the inner wall of said receiving cavity (11).

7. A double security lock device according to claim 6, characterized in that the direction of the spring force of the first spring part (25) is perpendicular to the direction in which the unlocking button (10) is moved to unlock.

8. The dual security lock device as claimed in claim 5, wherein the operating portion (23) is connected to the second blocking portion (22), the operating portion (23) and the first blocking portion (21) are respectively located at two opposite sides of the second blocking portion (22), and the operating portion (23) extends from the inside of the receiving cavity (11) to the outside of the receiving cavity (11) through the key hole (12).

9. A double security lock device according to claim 8, characterised in that a first retaining groove (24) is formed between the operating portion (23) and the second blocking portion (22).

10. A dual security lock arrangement as claimed in claim 3, characterised in that the second lock means further comprises a socket (27), the socket (27) being spaced from the first stop (21) and defining a clearance slot (26) therebetween into which the retainer (30) is inserted.

11. A dual security lock arrangement as claimed in claim 3, characterised in that the latch assembly (40) further comprises:

second elastic parts (42) respectively provided at both sides of the linkage part (41) and connected to the linkage part (41)

Third elastic parts (43) respectively arranged at the inner sides of the second elastic parts (42) and connected with the second elastic parts (42), wherein the elastic direction of the third elastic parts (43) is different from the elastic direction of the second elastic parts (42);

and the lock hole enclosing parts (44) are respectively arranged on the end parts of the third elastic parts (43), and lock holes (45) with adjustable sizes are enclosed between the lock hole enclosing parts (44).

12. A dual security lock arrangement as claimed in claim 3, characterised in that the cooperating portion (41) comprises first and second cooperating portions (411, 412) spaced apart, a travel restriction slot (414) being formed between the first and second cooperating portions (411, 412), the fixing portion (30) being located within the travel restriction slot (414).

13. A double safety lock device according to claim 11, wherein a first pressing surface (47) is provided on the second resilient portion (42), and a second pressing surface (48) is provided on the lock hole enclosing portion (44); when the second elastic part (42) is pressed and deformed, the first pressing surface (47) can press the second pressing surface (48) to push the lock hole enclosing part (44), so that the lock hole (45) is enlarged.