Double-lock-body differential type safety lock and storage device

Abstract

The invention discloses a double-lock-body differential type safety lock and a storage device. The safety lock comprises a lock shell; the dead bolt is slidably connected to the lock shell; the first lock body is provided with a first spring bolt and is used for driving the first spring bolt to retract during a first unlocking action; the second lock body is provided with a second spring bolt and is used for driving the second spring bolt to retract during a second unlocking action; the first rack is fixedly connected with the first spring bolt, and the first rack is connected to the lock shell in a sliding mode; the second rack is fixedly connected with the second spring bolt, and the second rack is connected to the lock shell in a sliding mode; the first gear is meshed with the first rack, and the first gear is further meshed with the second rack; and the middle sliding block is rotationally connected with the first gear, can slide in the lock shell and pushes the dead bolt to move synchronously. The first rack retracts in the linear direction to complete retraction of the dead bolt, compared with a swing area of a connecting rod of a four-rod mechanism, the linear reciprocating motion area is smaller, the size of the safety lock is reduced, and the safety lock can be used in a small space.

Description

Technical Field

[0001] The present application relates to the field of security technology, and in particular to a double-lock body differential safety lock and storage device. Background Art

[0002] In real life, customers in related industries such as banks, stock exchanges, and gold shops have high demands for security. The doors of the storage devices used in these occasions are usually specially made. However, the door needs to be opened and closed. The door handle plays a certain role in the opening and closing of the door. The rotating shaft of the door handle requires a certain rotation space. A lock tongue is set inside the door. The lock tongue can be extended and retracted relative to the outer frame of the door to achieve the opening and closing of the door.

[0003] There is a two-to-one lock available, which can be unlocked by opening one of the two locks, and this process is completed by a four-bar mechanism arranged on the two locks.

[0004] In the process of implementing the prior art, the inventor discovered that:

[0005] This type of lock is bulky, takes up a lot of space, and cannot be installed in a smaller space.

[0006] Therefore, it is necessary to provide a safety lock that takes up little space. Summary of the invention

[0007] The embodiment of the present application provides a technical solution to solve the technical problem of occupying a large space.

[0008] A double lock body differential safety lock provided in the present application includes:

[0009] Lock case;

[0010] A square tongue slidably connected to the lock housing;

[0011] A first lock body provided with a first lock tongue, used for driving the first lock tongue to retract during a first unlocking action, the first lock body being arranged inside a lock housing, and the first lock tongue being slidably connected to the lock housing;

[0012] A second lock body provided with a second lock tongue, used for driving the second lock tongue to retract during a second unlocking action, the second lock body being arranged inside the lock housing, and the second lock tongue being slidably connected to the lock housing;

[0013] A first rack fixedly connected to the first locking tongue, wherein the first rack is slidably connected to the lock housing;

[0014] a second rack fixedly connected to the second locking tongue, wherein the second rack is slidably connected to the lock housing;

[0015] a first gear meshing with the first rack, the first gear also meshing with a second rack;

[0016] An intermediate slider rotatably connected to the first gear, the intermediate slider being able to slide in the lock housing and push the square tongue to move synchronously;

[0017] When the first lock tongue retracts, the first rack fixedly connected to the first lock tongue retracts, the first gear meshing with the first rack rotates, the middle slider rotatably connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state;

[0018] When the second lock tongue retracts, the second rack fixedly connected to the second lock tongue retracts, the first gear meshing with the second rack rotates, the middle slider rotationally connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state.

[0019] Furthermore, in an embodiment provided in the present application, the safety lock further includes:

[0020] A third rack fixedly connected to the middle slider;

[0021] A second gear rotatably connected to the lock housing, wherein the second gear is meshed with a third rack;

[0022] A fourth rack is slidably connected to the lock housing, the fourth rack is meshed with the second gear, and the fourth rack is connected to the square tongue.

[0023] Further, in an embodiment provided in the present application, the second gear includes a first sector gear portion and a second sector gear portion, the first sector gear portion is meshed with the third rack, the second sector gear portion is meshed with the fourth rack, and the gear pitch circle diameter of the first sector gear portion is smaller than the gear pitch circle diameter of the second sector gear portion.

[0024] Furthermore, in an embodiment provided in the present application, the square tongue is provided with a groove for the fourth rack to extend into.

[0025] Furthermore, in an embodiment provided in the present application, the fourth rack is fixedly connected with a protrusion, and the square tongue is provided with a groove for the protrusion to extend into.

[0026] Furthermore, in an embodiment provided in the present application, the safety lock also includes: a base fixedly arranged on the lock shell, the first lock body is arranged on the base, the second lock body is arranged on the base, the first rack is fixedly connected with a first slider, the second rack is fixedly connected with a second slider, the base is provided with a first slide groove for sliding of the first slider and a second slide groove for sliding of the second slider, the first slide groove is arranged along the extension and retraction direction of the first lock tongue, and the second slide groove is arranged along the extension and retraction direction of the second lock tongue.

[0027] Further, in an embodiment provided in the present application, the first slide groove is provided with a first limiting portion, the second slide groove is provided with a second limiting portion, the end of the first slider abuts against the first limiting portion, and the end of the second slider abuts against the second limiting portion;

[0028] When the first locking tongue drives the first rack to retract, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the retracting direction, and the end of the second slider fixedly connected to the second rack abuts against the second limiting portion, so that the first gear moves along the retracting direction of the first rack, and the slider rotatably connected to the first gear moves along the retracting direction;

[0029] When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the retraction direction. The end of the first slider fixedly connected to the first rack abuts against the first limiting portion to make the first gear move along the retraction direction of the second rack, thereby moving the slider rotationally connected to the first gear along the retraction direction.

[0030] Further, in an embodiment provided in the present application, the first slide groove is provided with a third limiting portion, the second slide groove is provided with a fourth limiting portion, the end of the first slider away from the first limiting portion abuts against the third limiting portion, and the end of the second slider away from the second limiting portion abuts against the fourth limiting portion;

[0031] When the first locking tongue drives the first rack to extend, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the extension direction, and the end of the second slider fixedly connected to the second rack abuts against the fourth limiting portion, so that the first gear moves along the extension direction of the first rack, and the slider rotationally connected to the first gear moves along the extension direction;

[0032] When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the extension direction, and the end of the first slider fixedly connected to the first rack abuts against the third limiting portion to make the first gear move along the extension direction of the second rack, thereby moving the slider rotationally connected to the first gear along the extension direction.

[0033] Furthermore, in an embodiment provided in the present application, the first slider is matched with the first slide groove with a very small clearance, and the second slider is matched with the second slide groove with a very small clearance.

[0034] Furthermore, in an embodiment provided in the present application, the safety lock further includes:

[0035] A connecting rod rotatably connected to the first gear, wherein the connecting rod is coaxial with the first gear;

[0036] A limit platform is detachably connected to the connecting rod, and the limit platform presses the middle sliding block against one side of the first gear.

[0037] The present application also protects a storage device, the storage device comprising:

[0038] A cabinet with storage space;

[0039] The door panel matched with the cabinet body is used to form a storage space with the cabinet body;

[0040] A lock housing disposed on the door panel;

[0041] A square tongue slidably connected to the lock housing;

[0042] A first lock body provided with a first lock tongue, used for driving the first lock tongue to retract during a first unlocking action, the first lock body being arranged inside a lock housing, and the first lock tongue being slidably connected to the lock housing;

[0043] A second lock body provided with a second lock tongue, used for driving the second lock tongue to retract during a second unlocking action, the second lock body being arranged inside the lock housing, and the second lock tongue being slidably connected to the lock housing;

[0044] A first rack fixedly connected to the first locking tongue, wherein the first rack is slidably connected to the lock housing;

[0045] a second rack fixedly connected to the second locking tongue, wherein the second rack is slidably connected to the lock housing;

[0046] a first gear meshing with the first rack, the first gear also meshing with a second rack;

[0047] An intermediate slider rotatably connected to the first gear, the intermediate slider being able to slide in the lock housing and push the square tongue to move synchronously;

[0048] When the first lock tongue retracts, the first rack fixedly connected to the first lock tongue retracts, the first gear meshing with the first rack rotates, the middle slider rotatably connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state;

[0049] When the second lock tongue retracts, the second rack fixedly connected to the second lock tongue retracts, the first gear meshing with the second rack rotates, the middle slider rotationally connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state.

[0050] Furthermore, in an embodiment provided in the present application, the storage device further includes:

[0051] A third rack fixedly connected to the middle slider;

[0052] A second gear rotatably connected to the lock housing, wherein the second gear is meshed with a third rack;

[0053] A fourth rack is slidably connected to the lock housing, the fourth rack is meshed with the second gear, and the fourth rack is connected to the square tongue.

[0054] Further, in an embodiment provided in the present application, the second gear includes a first sector gear portion and a second sector gear portion, the first sector gear portion is meshed with the third rack, the second sector gear portion is meshed with the fourth rack, and the gear pitch circle diameter of the first sector gear portion is smaller than the gear pitch circle diameter of the second sector gear portion.

[0055] Furthermore, in an embodiment provided in the present application, the square tongue is provided with a groove for the fourth rack to extend into.

[0056] Furthermore, in an embodiment provided in the present application, the fourth rack is fixedly connected with a protrusion, and the square tongue is provided with a groove for the protrusion to extend into.

[0057] Furthermore, in an embodiment provided in the present application, the storage device also includes: a base fixedly arranged on the lock shell, the first lock body is arranged on the base, the second lock body is arranged on the base, the first rack is fixedly connected with a first slider, the second rack is fixedly connected with a second slider, the base is provided with a first slide groove for sliding of the first slider and a second slide groove for sliding of the second slider, the first slide groove is arranged along the extension and retraction direction of the first lock tongue, and the second slide groove is arranged along the extension and retraction direction of the second lock tongue.

[0058] Further, in an embodiment provided in the present application, the first slide groove is provided with a first limiting portion, the second slide groove is provided with a second limiting portion, the end of the first slider abuts against the first limiting portion, and the end of the second slider abuts against the second limiting portion;

[0059] When the first locking tongue drives the first rack to retract, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the retracting direction, and the end of the second slider fixedly connected to the second rack abuts against the second limiting portion, so that the first gear moves along the retracting direction of the first rack, and the slider rotatably connected to the first gear moves along the retracting direction;

[0060] When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the retraction direction. The end of the first slider fixedly connected to the first rack abuts against the first limiting portion to make the first gear move along the retraction direction of the second rack, thereby moving the slider rotationally connected to the first gear along the retraction direction.

[0061] Further, in an embodiment provided in the present application, the first slide groove is provided with a third limiting portion, the second slide groove is provided with a fourth limiting portion, the end of the first slider away from the first limiting portion abuts against the third limiting portion, and the end of the second slider away from the second limiting portion abuts against the fourth limiting portion;

[0062] When the first locking tongue drives the first rack to extend, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the extension direction, and the end of the second slider fixedly connected to the second rack abuts against the fourth limiting portion, so that the first gear moves along the extension direction of the first rack, and the slider rotationally connected to the first gear moves along the extension direction;

[0063] When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the extension direction, and the end of the first slider fixedly connected to the first rack abuts against the third limiting portion to make the first gear move along the extension direction of the second rack, thereby moving the slider rotationally connected to the first gear along the extension direction.

[0064] Furthermore, in an embodiment provided in the present application, the first slider is matched with the first slide groove with a very small clearance, and the second slider is matched with the second slide groove with a very small clearance.

[0065] Furthermore, in an embodiment provided in the present application, the storage device further includes:

[0066] A connecting rod rotatably connected to the first gear, wherein the connecting rod is coaxial with the first gear;

[0067] A limit platform is detachably connected to the connecting rod, and the limit platform presses the middle sliding block against one side of the first gear.

[0068] The embodiments provided in this application have at least the following beneficial effects:

[0069] The square tongue can be retracted by retracting the first rack and the second rack in a straight line. Compared with the swinging area of ​​the connecting rod of the four-bar mechanism, the area of ​​the straight reciprocating motion is smaller, which reduces the volume of the safety lock and allows the safety lock to be used in a smaller space. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0071] Figure 1 A schematic diagram of the first-angle structure of the interior of a safety lock provided in an embodiment of the present application.

[0072] Figure 2 A schematic diagram of the structure of the interior of the safety lock provided in an embodiment of the present application from a second angle.

[0073] Figure 3 A cross-sectional view of a connecting rod provided in an embodiment of the present application.

[0074] 100 Safety Lock

[0075] 1 Lock case

[0076] 2 square tongue

[0077] 3. First lock body

[0078] 31 First Lock

[0079] 4 Second lock body

[0080] 41 Second lock tongue

[0081] 51 First rack

[0082] 511 First adapter

[0083] 52 Second rack

[0084] 521 Second adapter

[0085] 53 First Gear

[0086] 54 Middle Slider

[0087] 55 Connecting rod

[0088] 56 Limiting table

[0089] 61 Third rack

[0090] 62 Second gear

[0091] 621 First sector gear unit

[0092] 622 Second sector gear unit

[0093] 63 Fourth rack

[0094] 7 Base

[0095] 71 First Chute

[0096] 72 Second chute. DETAILED DESCRIPTION

[0097] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0098] Please refer to Figure 1 and Figure 2 , is a double lock body differential safety lock 100 disclosed in the present application, comprising:

[0099] Lock housing 1;

[0100] A square tongue 2 slidably connected to the lock housing 1;

[0101] A first lock body 3 provided with a first lock tongue 31, used for driving the first lock tongue 31 to retract during a first unlocking action, wherein the first lock body 3 is arranged inside the lock housing 1, and the first lock tongue 31 is slidably connected to the lock housing 1;

[0102] A second lock body 4 provided with a second lock tongue 41, used for driving the second lock tongue 41 to retract during a second unlocking action, the second lock body 4 is arranged inside the lock housing 1, and the second lock tongue 41 is slidably connected to the lock housing 1;

[0103] A first rack 51 fixedly connected to the first locking tongue 31, wherein the first rack 51 is slidably connected to the lock housing 1;

[0104] A second rack 52 fixedly connected to the second locking tongue 41, wherein the second rack 52 is slidably connected to the lock housing 1;

[0105] a first gear 53 meshing with the first rack 51, wherein the first gear 53 is also meshing with the second rack 52;

[0106] An intermediate slider 54 rotatably connected to the first gear 53, the intermediate slider 54 can slide on the lock housing 1 and push the square tongue 2 to move synchronously;

[0107] When the first locking tongue 31 retracts, the first rack 51 fixedly connected to the first locking tongue 31 retracts, the first gear 53 meshing with the first rack 51 rotates, the middle slider 54 rotatably connected to the first gear 53 moves along the retraction direction, and the middle slider 54 pushes the square tongue 2 to retract synchronously, and the safety lock 100 is in the unlocked state;

[0108] When the second lock tongue 41 retracts, the second rack 52 fixedly connected to the second lock tongue 41 retracts, the first gear 53 meshing with the second rack 52 rotates, the intermediate slider 54 rotatably connected to the first gear 53 moves in the retraction direction, and the intermediate slider 54 pushes the square tongue 2 to retract synchronously, and the safety lock 100 is in an unlocked state.

[0109] In the present application, the specific form of the lock housing 1 varies according to the forms of the first lock body 3 and the second lock body 4. The lock housing 1 constitutes a storage space for objects to be stored. The safety lock 100 is installed on the door. When the square tongue 2 is extended, the square tongue 2 extends into the door frame matched with the door, so that the square tongue 2 is blocked between the door and the door frame, so that the door is fixed to the door frame, thereby closing the storage space. When the square tongue 2 is retracted, the square tongue 2 withdraws from the door frame so that the door can move from the door frame, thereby opening the storage space.

[0110] The interior of the lock housing 1 has a space for storing parts. The lock housing 1 is fixedly connected to the door. The lock housing 1 is provided with a through hole for the tongue 2 to extend out. The first lock body 3 can be a password lock, a mechanical lock or a fingerprint lock. The first lock body 3 includes a first lock core and a first lock tongue 31. The second lock body 4 can be a password lock, a mechanical lock or a fingerprint lock. The second lock body 4 includes a second lock core and a second lock tongue 41. The first unlocking action can be an action of unlocking with a key. The first unlocking action can also be an action of unlocking by inputting a password. The first unlocking action can also be an action of unlocking by verifying a fingerprint. The second unlocking action can be an action of unlocking with a key. The second unlocking action can also be an action of unlocking by inputting a password. The second unlocking action can also be an action of unlocking by verifying a fingerprint. Specifically, the first lock body 3 and the second lock body 4 are both arranged in the internal receiving space of the lock body. The shell parts of the first lock body 3 and the second lock body 4 are fixedly connected to the lock body by bolts.

[0111] During the first unlocking action, the first tongue lock of the first lock body 3 moves toward the direction of being retracted into the housing of the first lock body 3. During the second unlocking action, the second tongue lock of the second lock body 4 moves toward the direction of being retracted into the housing of the second lock body 4.

[0112] The first lock body 3 and the second lock body 4 can be arranged side by side. The first lock tongue 31 and the second lock tongue 41 are parallel to each other, so that when unlocking, the first lock tongue 31 and the second lock tongue 41 are synchronously retracted toward the same direction.

[0113] The first rack 51 and the second rack 52 are parallel to each other and to the first locking tongue 31. The gear teeth side of the first rack 51 and the gear teeth side of the second rack 52 are opposite to each other. The first gear 53 is between the first rack 51 and the second rack 52 and meshes with both the first rack 51 and the second rack 52.

[0114] The distance between the first rack 51 and the second rack 52 is the diameter of the pitch circle of the first gear 53. In a limited space, the first gear 53 can be a first gear 53 with a small diameter.

[0115] The first locking tongue 31 and the first rack 51 are fixedly connected via a first adapter 511 . The second locking tongue 41 and the second rack 52 are fixedly connected via a second adapter 521 .

[0116] The first adapter 511 and the second adapter 521 are both in a right angle shape. One right angle end of the first adapter 511 is fixedly connected to the first locking tongue 31. The other right angle end of the first adapter 511 is fixedly connected to the first rack 51. One right angle end of the second adapter 521 is fixedly connected to the second locking tongue 41. The other right angle end of the second adapter 521 is fixedly connected to the second rack 52.

[0117] The first adapter 511 transmits the telescopic movement of the first locking tongue 31 in parallel to the first rack 51. The second adapter 521 transmits the telescopic movement of the second locking tongue 41 in parallel to the second rack 52. With the right-angle shape, the parallel distance between the first locking tongue 31 and the second locking tongue 41 is smaller than the parallel distance between the first rack 51 and the second rack 52, so as to reduce the occupied space.

[0118] The first gear 53 and the intermediate slider 54 are rotatably connected via a bearing.

[0119] During the first unlocking action, the first locking tongue 31 moves in the retracting direction, and the first locking tongue 31 drives the first adapter 511 and the first rack 51 to move in turn, and the second rack 52 has a tendency to move. Since the second locking tongue 41 does not move, the second rack 52 does not move. The first gear 53 meshes with the first rack 51, and the second rack 52 meshes with the first gear 53. The first gear 53 rotates and drives the first rack 51 to move in the direction of retracting the first locking tongue 31. The first gear 53 also drives the middle slider 54 to move. The middle slider 54 drives the square tongue 2 to retract, so that the safety lock 100 is in the unlocked state.

[0120] During the second unlocking action, the second locking tongue 41 moves in the retracting direction, and the second locking tongue 41 drives the second adapter 521 and the second rack 52 to move in turn, and the first rack 51 has a tendency to move. Since the first locking tongue 31 does not move, the first rack 51 does not move. The first gear 53 meshes with the second rack 52, and the first rack 51 meshes with the first gear 53. The first gear 53 rotates and drives the second rack 52 to move in the direction of retracting the second locking tongue 41. The first gear 53 drives the middle slider 54 to move at the same time. The middle slider 54 drives the square tongue 2 to retract, so that the safety lock 100 is in the unlocked state.

[0121] When the first unlocking action and the second unlocking action are performed simultaneously, the first locking tongue 31 and the second locking tongue 41 move toward the retraction direction at the same time, the first adapter 511 and the second adapter 521 simultaneously drive the first rack 51 and the second rack 52 to move toward the retraction direction, the first gear 53 moves toward the retraction direction, and the middle slider 54 moves toward the retraction direction. The middle slider 54 drives the square tongue 2 to retract, so that the safety lock 100 is in the unlocked state.

[0122] It can be understood that the first rack 51 only needs to move back and forth along the straight line of the first lock tongue 31 to complete the first gear 53 driving the middle slider 54 to make a straight line reciprocating motion, thereby driving the square tongue 2 to make a telescopic motion. In other words, the first rack 51, the second rack 52 and the middle slider 54 all make a straight line reciprocating motion. The first gear 53 is between the first rack 51 and the second rack 52, and the rotation and movement of the first gear 53 will not exceed the motion range of the first rack 51 and the second rack 52. The straight line reciprocating motion of the first gear 53 and the second gear 62 is the part with the largest occupied area except for the occupied area of ​​the first lock body 3 and the second lock body 4. The first rack 51 and the second rack 52 are both meshed with the first gear 53 to form a double rack and pinion mechanism. Compared with the swing of the connecting rod of the four-bar mechanism occupying a space in an area, the movement of the first rack 51 and the second rack 52 along the retraction direction only occupies the space in the straight line position, and the occupied space is small. In addition, the meshing between the gears and racks has high motion transmission accuracy, which improves the movement accuracy of the square tongue 2, thereby improving the accuracy of unlocking and locking the safety lock 100.

[0123] In order to further reduce the occupied space, in a specific implementation manner provided in the present application, the safety lock 100 further includes:

[0124] A third rack 61 fixedly connected to the middle slider 54;

[0125] A second gear 62 rotatably connected to the lock housing 1 , wherein the second gear 62 is meshed with the third rack 61 ;

[0126] A fourth rack 63 is slidably connected to the lock housing 1 , the fourth rack 63 is meshed with the second gear 62 , and the fourth rack 63 is connected to the square tongue 2 .

[0127] In the present application, the third rack 61 and the middle slider 54 can be integrally formed. The third rack 61 is parallel to the first rack 51. The second gear 62 can be a cylindrical gear. The second gear 62 can also be a special-shaped gear. The fourth rack 63 is parallel to the third rack 61. The fourth rack 63 and the square tongue 2 can be bolted. The fourth rack 63 and the square tongue 2 can also be snap-fitted.

[0128] It can be understood that the third rack 61 and the fourth rack 63 are both meshed with the second gear 62, and the third rack 61 and the fourth rack 63 are parallel to each other. The second gear 62 is disposed between the third rack 61 and the fourth rack 63. When the second gear 62 rotates, the movement directions of the third rack 61 and the fourth rack 63 are opposite to each other.

[0129] The square tongue 2 is used to unlock or lock the door. The square tongue 2 must be set at a position close to the door frame and move in a direction perpendicular to the door side plate. There is a hole on the door frame for the square tongue 2 to extend into. If the first lock tongue 31 moves in the same direction as the square tongue 2, then the first lock tongue 31 and the second lock tongue 41 are also set at a position close to the door frame. When the first lock tongue 31 and the second lock tongue 41 are extended, the first lock tongue 31 and the second lock tongue 41 also extend into the door frame. In this case, a hole for the first lock tongue 31 and the second lock tongue 41 to extend into needs to be reserved on the door frame, which is inconvenient and occupies a large space. Through the mechanism of the double gear meshing pinion composed of the third rack 61, the fourth rack 63 and the second gear 62, the moving direction of the square tongue 2 is opposite to the moving direction of the first lock tongue 31 and the second lock tongue 41, so that the first lock tongue 31 and the second lock tongue 41 are set at a position away from the door frame, so that the first lock tongue 31 and the second lock tongue 41 extend or retract toward the position away from the door frame, without occupying the space of the door frame, it is convenient to use and occupies a small space.

[0130] In order to further reduce the occupied space, in a specific embodiment provided in the present application, the second gear 62 includes a first sector gear portion 621 and a second sector gear portion 622, the first sector gear portion 621 is meshed with the third rack 61, the second sector gear portion 622 is meshed with the fourth rack 63, and the gear pitch circle diameter of the first sector gear portion 621 is smaller than the gear pitch circle diameter of the second sector gear portion 622.

[0131] In the present application, the second gear 62 is a special-shaped gear including two sector-shaped parts. The first sector-shaped gear part 621 and the second sector-shaped gear part 622 can also be two sector-shaped gears coaxially fixed.

[0132] It is understandable that, because the gear pitch circle diameter of the first sector gear portion 621 is smaller than the gear pitch circle diameter of the second sector gear portion 622, the motion transfer coefficient of the second gear 62 is greater than 1. That is, when the third rack 61 moves 1 step, the number of steps taken by the fourth rack 63 is greater than 1, and therefore, when the first lock tongue 31 retracts 1 step, the number of steps retracted by the square tongue 2 is greater than 1. This mechanical combination method of converting a small moving distance of the first lock tongue 31 into a large moving distance of the square tongue 2 further reduces the occupied space of the safety lock 100.

[0133] Furthermore, in a specific embodiment provided in the present application, the square tongue 2 is provided with a groove for the fourth rack 63 to extend into.

[0134] In the present application, the end of the fourth rack 63 close to the square tongue 2 extends into the groove of the square tongue 2. The fourth rack 63 and the square tongue 2 can be bolted. The fourth rack 63 and the square tongue 2 can also be snap-connected. The fourth rack 63 and the square tongue 2 can also be glued. It can be understood that the fourth rack 63 extends into the square tongue 2, which reduces the occupied space compared to the connection mode in which the outer surface of the fourth rack 63 and the square tongue 2 are in contact.

[0135] Furthermore, in a specific embodiment provided in the present application, the fourth rack 63 is fixedly connected with a protrusion, and the square tongue 2 is provided with a groove for the protrusion to extend into.

[0136] In the present application, the protrusion protrudes from the side of the fourth rack 63 close to the square tongue 2. Compared with the bolt connection method, the connection method of embedding the protrusion into the groove reduces the occupied space, is simple to manufacture, and makes installation simpler and convenient to assemble and disassemble.

[0137] Furthermore, in order to enable the first rack 51 and the second rack 52 to slide in the lock housing 1, in a specific embodiment provided in the present application, the safety lock 100 also includes: a base 7 fixedly arranged on the lock housing 1, the first lock body 3 is arranged on the base 7, the second lock body 4 is arranged on the base 7, the intermediate slider 54 is slidably connected to the base 7, the first rack 51 is fixedly connected to the first slider, the second rack 52 is fixedly connected to the second slider, and the base 7 is provided with a first slide groove 71 for the first slider to slide and a second slide groove 72 for the second slider to slide, the first slide groove 71 is arranged along the extension and contraction direction of the first lock tongue 31, and the second slide groove 72 is arranged along the extension and contraction direction of the second lock tongue 41.

[0138] In the present application, the first slide groove 71 is arranged along the extension direction of the first locking tongue 31. Since the first rack 51 and the second rack 52 are both meshed with the first gear 53, the first rack 51 and the second rack 52 are parallel to each other. The extension directions of the first locking tongue 31 and the second locking tongue 41 are parallel to each other. The moving directions of the first rack 51 and the second rack 52 are parallel to each other. The second slide groove 72 is parallel to the first slide groove 71. The middle slider 54 is fixed with a third slider. The base 7 is provided with a third slide groove for the third slider to slide. The length direction of the third slide groove is parallel to the length direction of the first slide groove 71.

[0139] It can be understood that the first slide groove 71 limits the freedom of the first slider along the moving direction perpendicular to the first lock tongue 31. The second slide groove 72 limits the freedom of the second slider along the moving direction perpendicular to the first lock tongue 31. The first rack 51 slides in the lock housing 1 along the telescopic direction of the first lock tongue 31 and the second rack 52 slides in the lock housing 1 along the telescopic direction of the second lock tongue 41.

[0140] Further, in a specific embodiment provided in the present application, the first slide groove 71 is provided with a first limiting portion, the second slide groove 72 is provided with a second limiting portion, the end of the first slider abuts against the first limiting portion, and the end of the second slider abuts against the second limiting portion;

[0141] When the first locking tongue 31 drives the first rack 51 to retract, the first gear 53 meshing with the first rack 51 rotates, and the second rack 52 meshing with the first gear 53 tends to move in the retracting direction. The end of the second slider fixedly connected to the second rack 52 abuts against the second limiting portion, so that the first gear 53 moves along the retracting direction of the first rack 51, and the slider rotatably connected to the first gear 53 moves along the retracting direction.

[0142] When the second locking tongue 41 drives the second rack 52 to retract, the first gear 53 meshing with the second rack 52 rotates, and the first rack 51 meshing with the first gear 53 tends to move in the retraction direction. The end of the first slider fixedly connected to the first rack 51 abuts against the first limiting portion, so that the first gear 53 moves along the retraction direction of the second rack 52, and the slider rotatably connected to the first gear 53 moves along the retraction direction.

[0143] In the present application, the first limiting portion may be the inner end surface of the first sliding groove 71 close to the first locking tongue 31 . The second limiting portion may be the inner end surface of the second sliding groove 72 close to the second locking tongue 41 .

[0144] It is understandable that in the mechanism of the double rack and pinion combination, if one rack moves and the other rack is not limited, the pinion only rotates but does not move. Under the condition that the second lock body 4 is damaged and the second lock tongue 41 moves freely in the extension direction, the second rack 52 moves freely in the extension direction. When the first lock tongue 31 drives the first rack 51 to retract, the first gear 53 rotates, and the second rack 52 moves in the opposite direction to the first rack 51. At this time, since the second rack 52 is not restricted from moving, the first gear 53 will not move in the direction of the first lock tongue 31 retracting, and thus will not drive the middle slider 54 to move in the direction of the first lock tongue 31 retracting, and the square tongue 2 will not move. Therefore, the second limiting portion limits the sliding freedom of the second slider on the second slide groove 72 toward the extension direction of the second lock tongue 41, so that the first gear 53 moves in the direction of the first lock tongue 31 retracting, thereby increasing the practicality of the safety lock 100.

[0145] Likewise, the first limiting portion limits the sliding freedom of the first slider on the first sliding groove 71 toward the extension direction of the first locking tongue 31 , thereby causing the first gear 53 to move toward the retraction direction of the second locking tongue 41 .

[0146] Further, in a specific embodiment provided in the present application, the first slide groove 71 is provided with a third limiting portion, the second slide groove 72 is provided with a fourth limiting portion, the end of the first slider away from the first limiting portion abuts against the third limiting portion, and the end of the second slider away from the second limiting portion abuts against the fourth limiting portion;

[0147] When the first locking tongue 31 drives the first rack 51 to extend, the first gear 53 meshing with the first rack 51 rotates, and the second rack 52 meshing with the first gear 53 tends to move in the extension direction. The end of the second slider fixedly connected to the second rack 52 abuts against the fourth limiting portion, so that the first gear 53 moves along the extension direction of the first rack 51, and the slider rotatably connected to the first gear 53 moves along the extension direction.

[0148] When the second locking tongue 41 drives the second rack 52 to retract, the first gear 53 meshing with the second rack 52 rotates, and the first rack 51 meshing with the first gear 53 tends to move in the extension direction. The end of the first slider fixedly connected to the first rack 51 abuts against the third limiting portion, so that the first gear 53 moves along the extension direction of the second rack 52, and the slider rotatably connected to the first gear 53 moves along the extension direction.

[0149] In the present application, the third limiting portion may be the inner end surface of the first sliding groove 71 away from the first locking tongue 31 . The fourth limiting portion may be the inner end surface of the second sliding groove 72 away from the second locking tongue 41 .

[0150] It is understandable that in the mechanism of the double rack and pinion combination, if one rack moves and the other rack is not limited, the pinion only rotates but does not move. Under the condition that the second lock body 4 is damaged and the second lock tongue 41 moves freely in the telescopic direction, the second rack 52 moves freely in the telescopic direction. When the first lock tongue 31 drives the first rack 51 to extend and move, the first gear 53 rotates, and the second rack 52 moves in the opposite direction to the first rack 51. At this time, since the second rack 52 is not restricted from moving, the first gear 53 will not move in the direction of the extension of the first lock tongue 31, thereby not driving the middle slider 54 to move in the direction of the extension of the first lock tongue 31, and the square tongue 2 will not move. Therefore, the fourth limiting portion limits the sliding freedom of the second slider on the second slide groove 72 toward the retraction direction of the second lock tongue 41, so that the first gear 53 moves in the direction of the extension of the first lock tongue 31, increasing the practicality of the safety lock 100.

[0151] Likewise, the third limiting portion limits the sliding freedom of the first slider on the first sliding groove 71 toward the retraction direction of the first locking tongue 31 , thereby allowing the first gear 53 to move toward the extension direction of the second locking tongue 41 .

[0152] Furthermore, in a specific embodiment provided in the present application, the first sliding block is matched with the first sliding groove 71 with a very small clearance, and the second sliding block is matched with the second sliding groove 72 with a very small clearance.

[0153] In the present application, the first slider is matched with the groove side of the first slide 71 with a very small gap. The second slider is matched with the groove side of the second slide 72 with a very small gap. It can be understood that the very small gap not only ensures that there is a gap for mutual sliding between the first slider and the first slide 71 and is easy to install, but also ensures that the displacement between the first slider and the groove side of the first slide 71 will not be too large, and the meshing accuracy between the first rack 51 and the first gear 53 is ensured. The very small gap between the second slider and the second slide 72 not only ensures that there is a gap for mutual sliding and is easy to install, but also ensures that the displacement between the second slider and the groove side of the second slide 72 will not be too large, and the effective meshing between the second rack 52 and the first gear 53 is ensured, the phenomenon of gear slippage is avoided, and the movement accuracy of the square tongue 2 is improved.

[0154] Please refer to Figure 3 Further, in a specific implementation manner provided in the present application, the safety lock 100 further includes:

[0155] A connecting rod 55 rotatably connected to the first gear 53, wherein the connecting rod 55 is coaxial with the first gear 53;

[0156] A limiting platform 56 is detachably connected to the connecting rod 55 , and the limiting platform 56 presses the middle slider 54 against one side of the first gear 53 .

[0157] In the present application, the connecting rod 55 is rotatably connected to the first gear 53 via a bearing. The limit platform 56 and the connecting rod 55 may be threadedly connected. Specifically, the connecting rod 55 may be a step screw. The limit platform 56 may be a rivet nut. The inner end face of the step at one end of the step screw provided with a step abuts against the inner ring of the bearing. One end of the thread of the step screw is threadedly connected to the rivet nut. The end face of the rivet nut abuts against the intermediate slider 54. By utilizing the preload force between the threaded pairs of the threaded connection, the rivet nut and the step screw jointly limit the degree of freedom of the intermediate slider 54 and the first gear 53 along the axial direction of the step screw, thereby avoiding the first gear 53 and the intermediate slider 54 from loosening during movement, ensuring that the movement of the first gear 53 is transmitted to the intermediate slider 54, ensuring the movement of the square tongue 2, and improving the practicality of the safety lock 100.

[0158] The present application also discloses a storage device, which comprises:

[0159] Cavity;

[0160] A door panel matched with the cavity is used to form a storage space with the cavity;

[0161] A lock housing 1 arranged on the door panel;

[0162] A square tongue 2 slidably connected to the lock housing 1;

[0163] A first lock body 3 provided with a first lock tongue 31, used for driving the first lock tongue 31 to retract during a first unlocking action, wherein the first lock body 3 is arranged inside the lock housing 1, and the first lock tongue 31 is slidably connected to the lock housing 1;

[0164] A second lock body 4 provided with a second lock tongue 41, used for driving the second lock tongue 41 to retract during a second unlocking action, the second lock body 4 is arranged inside the lock housing 1, and the second lock tongue 41 is slidably connected to the lock housing 1;

[0165] A first rack 51 fixedly connected to the first locking tongue 31, wherein the first rack 51 is slidably connected to the lock housing 1;

[0166] A second rack 52 fixedly connected to the second locking tongue 41, wherein the second rack 52 is slidably connected to the lock housing 1;

[0167] a first gear 53 meshing with the first rack 51, wherein the first gear 53 is also meshing with the second rack 52;

[0168] An intermediate slider 54 rotatably connected to the first gear 53, the intermediate slider 54 can slide on the lock housing 1 and push the square tongue 2 to move synchronously;

[0169] When the first locking tongue 31 retracts, the first rack 51 fixedly connected to the first locking tongue 31 retracts, the first gear 53 meshing with the first rack 51 rotates, the middle slider 54 rotatably connected to the first gear 53 moves along the retraction direction, and the middle slider 54 pushes the square tongue 2 to retract synchronously, and the safety lock 100 is in the unlocked state;

[0170] When the second lock tongue 41 retracts, the second rack 52 fixedly connected to the second lock tongue 41 retracts, the first gear 53 meshing with the second rack 52 rotates, the intermediate slider 54 rotatably connected to the first gear 53 moves in the retraction direction, and the intermediate slider 54 pushes the square tongue 2 to retract synchronously, and the safety lock 100 is in an unlocked state.

[0171] In the present application, the door panel serves as a shielding member for the entrance and exit of the cabinet. When the door panel can rotate freely, the cabinet can be opened freely. When the rotation of the door panel is restricted, the cabinet is not opened, thereby realizing closed protection of objects in the cabinet.

[0172] The specific form of the lock housing 1 varies according to the forms of the first lock body 3 and the second lock body 4. The lock housing 1 constitutes a storage space for objects to be stored. The safety lock 100 is installed on the door. When the square tongue 2 is extended, the square tongue 2 extends into the door frame matched with the door, so that the square tongue 2 is blocked between the door and the door frame, so that the door is fixed to the door frame, thereby closing the storage space. When the square tongue 2 is retracted, the square tongue 2 withdraws from the door frame so that the door can move from the door frame, thereby opening the storage space.

[0173] The interior of the lock housing 1 has a space for storing parts. The lock housing 1 is fixedly connected to the door. The lock housing 1 is provided with a through hole for the tongue 2 to extend out. The first lock body 3 can be a password lock, a mechanical lock or a fingerprint lock. The first lock body 3 includes a first lock core and a first lock tongue 31. The second lock body 4 can be a password lock, a mechanical lock or a fingerprint lock. The second lock body 4 includes a second lock core and a second lock tongue 41. The first unlocking action can be an action of unlocking with a key. The first unlocking action can also be an action of unlocking by inputting a password. The first unlocking action can also be an action of unlocking by verifying a fingerprint. The second unlocking action can be an action of unlocking with a key. The second unlocking action can also be an action of unlocking by inputting a password. The second unlocking action can also be an action of unlocking by verifying a fingerprint. Specifically, the first lock body 3 and the second lock body 4 are both arranged in the internal receiving space of the lock body. The shell parts of the first lock body 3 and the second lock body 4 are fixedly connected to the lock body by bolts.

[0174] During the first unlocking action, the first tongue lock of the first lock body 3 moves toward the direction of being retracted into the housing of the first lock body 3. During the second unlocking action, the second tongue lock of the second lock body 4 moves toward the direction of being retracted into the housing of the second lock body 4.

[0175] The first lock body 3 and the second lock body 4 can be arranged side by side. The first lock tongue 31 and the second lock tongue 41 are parallel to each other, so that when unlocking, the first lock tongue 31 and the second lock tongue 41 are synchronously retracted toward the same direction.

[0176] The first rack 51 and the second rack 52 are parallel to each other and to the first locking tongue 31. The gear teeth side of the first rack 51 and the gear teeth side of the second rack 52 are opposite to each other. The first gear 53 is between the first rack 51 and the second rack 52 and meshes with both the first rack 51 and the second rack 52.

[0177] The distance between the first rack 51 and the second rack 52 is the diameter of the pitch circle of the first gear 53. In a limited space, the first gear 53 can be a first gear 53 with a small diameter.

[0178] The first locking tongue 31 and the first rack 51 are fixedly connected via a first adapter 511 . The second locking tongue 41 and the second rack 52 are fixedly connected via a second adapter 521 .

[0179] The first adapter 511 and the second adapter 521 are both in a right angle shape. One right angle end of the first adapter 511 is fixedly connected to the first locking tongue 31. The other right angle end of the first adapter 511 is fixedly connected to the first rack 51. One right angle end of the second adapter 521 is fixedly connected to the second locking tongue 41. The other right angle end of the second adapter 521 is fixedly connected to the second rack 52.

[0180] The first adapter 511 transmits the telescopic movement of the first locking tongue 31 in parallel to the first rack 51. The second adapter 521 transmits the telescopic movement of the second locking tongue 41 in parallel to the second rack 52. With the right-angle shape, the parallel distance between the first locking tongue 31 and the second locking tongue 41 is smaller than the parallel distance between the first rack 51 and the second rack 52, so as to reduce the occupied space.

[0181] The first gear 53 and the intermediate slider 54 are rotatably connected via a bearing.

[0182] During the first unlocking action, the first locking tongue 31 moves in the retracting direction, and the first locking tongue 31 drives the first adapter 511 and the first rack 51 to move in turn, and the second rack 52 has a tendency to move. Since the second locking tongue 41 does not move, the second rack 52 does not move. The first gear 53 meshes with the first rack 51, and the second rack 52 meshes with the first gear 53. The first gear 53 rotates and drives the first rack 51 to move in the direction of retracting the first locking tongue 31. The first gear 53 also drives the middle slider 54 to move. The middle slider 54 drives the square tongue 2 to retract, so that the safety lock 100 is in the unlocked state.

[0183] During the second unlocking action, the second locking tongue 41 moves in the retracting direction, and the second locking tongue 41 drives the second adapter 521 and the second rack 52 to move in turn, and the first rack 51 has a tendency to move. Since the first locking tongue 31 does not move, the first rack 51 does not move. The first gear 53 meshes with the second rack 52, and the first rack 51 meshes with the first gear 53. The first gear 53 rotates and drives the second rack 52 to move in the direction of retracting the second locking tongue 41. The first gear 53 drives the middle slider 54 to move at the same time. The middle slider 54 drives the square tongue 2 to retract, so that the safety lock 100 is in the unlocked state.

[0184] When the first unlocking action and the second unlocking action are performed simultaneously, the first locking tongue 31 and the second locking tongue 41 move toward the retraction direction at the same time, the first adapter 511 and the second adapter 521 simultaneously drive the first rack 51 and the second rack 52 to move toward the retraction direction, the first gear 53 moves toward the retraction direction, and the middle slider 54 moves toward the retraction direction. The middle slider 54 drives the square tongue 2 to retract, so that the safety lock 100 is in the unlocked state.

[0185] It can be understood that the first rack 51 only needs to move back and forth along the straight line of the first lock tongue 31 to complete the first gear 53 driving the middle slider 54 to make a straight line reciprocating motion, thereby driving the square tongue 2 to make a telescopic motion. In other words, the first rack 51, the second rack 52 and the middle slider 54 all make a straight line reciprocating motion. The first gear 53 is between the first rack 51 and the second rack 52, and the rotation and movement of the first gear 53 will not exceed the motion range of the first rack 51 and the second rack 52. The straight line reciprocating motion of the first gear 53 and the second gear 62 is the part with the largest occupied area except for the occupied area of ​​the first lock body 3 and the second lock body 4. The first rack 51 and the second rack 52 are both meshed with the first gear 53 to form a double rack and pinion mechanism. Compared with the swing of the connecting rod of the four-bar mechanism occupying a space in an area, the movement of the first rack 51 and the second rack 52 along the retraction direction only occupies the space in the straight line position, and the occupied space is small.

[0186] In addition, the meshing between the gears and racks has high motion transmission accuracy, which improves the movement accuracy of the square tongue 2, thereby improving the accuracy of unlocking and locking the safety lock 100.

[0187] In order to further reduce the occupied space, in a specific implementation manner provided in the present application, the safety lock 100 further includes:

[0188] A third rack 61 fixedly connected to the middle slider 54;

[0189] A second gear 62 rotatably connected to the lock housing 1 , wherein the second gear 62 is meshed with the third rack 61 ;

[0190] A fourth rack 63 is slidably connected to the lock housing 1 , the fourth rack 63 is meshed with the second gear 62 , and the fourth rack 63 is connected to the square tongue 2 .

[0191] In the present application, the third rack 61 and the middle slider 54 can be integrally formed. The third rack 61 is parallel to the first rack 51. The second gear 62 can be a cylindrical gear. The second gear 62 can also be a special-shaped gear. The fourth rack 63 is parallel to the third rack 61. The fourth rack 63 and the square tongue 2 can be bolted. The fourth rack 63 and the square tongue 2 can also be snap-fitted.

[0192] It can be understood that the third rack 61 and the fourth rack 63 are both meshed with the second gear 62, and the third rack 61 and the fourth rack 63 are parallel to each other. The second gear 62 is disposed between the third rack 61 and the fourth rack 63. When the second gear 62 rotates, the movement directions of the third rack 61 and the fourth rack 63 are opposite to each other.

[0193] The square tongue 2 is used to unlock or lock the door. The square tongue 2 must be set at a position close to the door frame and move in a direction perpendicular to the door side plate. There is a hole on the door frame for the square tongue 2 to extend into. If the first lock tongue 31 moves in the same direction as the square tongue 2, then the first lock tongue 31 and the second lock tongue 41 are also set at a position close to the door frame. When the first lock tongue 31 and the second lock tongue 41 are extended, the first lock tongue 31 and the second lock tongue 41 also extend into the door frame. In this case, a hole for the first lock tongue 31 and the second lock tongue 41 to extend into needs to be reserved on the door frame, which is inconvenient and occupies a large space. Through the mechanism of the double gear meshing pinion composed of the third rack 61, the fourth rack 63 and the second gear 62, the moving direction of the square tongue 2 is opposite to the moving direction of the first lock tongue 31 and the second lock tongue 41, so that the first lock tongue 31 and the second lock tongue 41 are set at a position away from the door frame, so that the first lock tongue 31 and the second lock tongue 41 extend or retract toward the position away from the door frame, without occupying the space of the door frame, it is convenient to use and occupies a small space.

[0194] In order to further reduce the occupied space, in a specific embodiment provided in the present application, the second gear 62 includes a first sector gear portion 621 and a second sector gear portion 622, the first sector gear portion 621 is meshed with the third rack 61, the second sector gear portion 622 is meshed with the fourth rack 63, and the gear pitch circle diameter of the first sector gear portion 621 is smaller than the gear pitch circle diameter of the second sector gear portion 622.

[0195] In the present application, the second gear 62 is a special-shaped gear including two sector-shaped parts. The first sector-shaped gear part 621 and the second sector-shaped gear part 622 can also be two sector-shaped gears coaxially fixed.

[0196] It is understandable that, because the gear pitch circle diameter of the first sector gear portion 621 is smaller than the gear pitch circle diameter of the second sector gear portion 622, the motion transfer coefficient of the second gear 62 is greater than 1. That is, when the third rack 61 moves 1 step, the number of steps taken by the fourth rack 63 is greater than 1, and therefore, when the first lock tongue 31 retracts 1 step, the number of steps retracted by the square tongue 2 is greater than 1. This mechanical combination method of converting a small moving distance of the first lock tongue 31 into a large moving distance of the square tongue 2 further reduces the occupied space of the safety lock 100.

[0197] Furthermore, in a specific embodiment provided in the present application, the square tongue 2 is provided with a groove for the fourth rack 63 to extend into.

[0198] In the present application, the end of the fourth rack 63 close to the square tongue 2 extends into the groove of the square tongue 2. The fourth rack 63 and the square tongue 2 can be bolted. The fourth rack 63 and the square tongue 2 can also be snap-connected. The fourth rack 63 and the square tongue 2 can also be glued. It can be understood that the fourth rack 63 extends into the square tongue 2, which reduces the occupied space compared to the connection mode in which the outer surface of the fourth rack 63 and the square tongue 2 are in contact.

[0199] Furthermore, in a specific embodiment provided in the present application, the fourth rack 63 is fixedly connected with a protrusion, and the square tongue 2 is provided with a groove for the protrusion to extend into.

[0200] In the present application, the protrusion protrudes from the side of the fourth rack 63 close to the square tongue 2. Compared with the bolt connection method, the connection method of embedding the protrusion into the groove reduces the occupied space, is simple to manufacture, and makes installation simpler and convenient to assemble and disassemble.

[0201] Furthermore, in order to enable the first rack 51 and the second rack 52 to slide in the lock housing 1, in a specific embodiment provided in the present application, the safety lock 100 also includes: a base 7 fixedly arranged on the lock housing 1, the first lock body 3 is arranged on the base 7, the second lock body 4 is arranged on the base 7, the intermediate slider 54 is slidably connected to the base 7, the first rack 51 is fixedly connected to the first slider, the second rack 52 is fixedly connected to the second slider, and the base 7 is provided with a first slide groove 71 for the first slider to slide and a second slide groove 72 for the second slider to slide, the first slide groove 71 is arranged along the extension and contraction direction of the first lock tongue 31, and the second slide groove 72 is arranged along the extension and contraction direction of the second lock tongue 41.

[0202] In the present application, the first slide groove 71 is arranged along the extension direction of the first locking tongue 31. Since the first rack 51 and the second rack 52 are both meshed with the first gear 53, the first rack 51 and the second rack 52 are parallel to each other. The extension directions of the first locking tongue 31 and the second locking tongue 41 are parallel to each other. The moving directions of the first rack 51 and the second rack 52 are parallel to each other. The second slide groove 72 is parallel to the first slide groove 71. The middle slider 54 is fixed with a third slider. The base 7 is provided with a third slide groove for the third slider to slide. The length direction of the third slide groove is parallel to the length direction of the first slide groove 71.

[0203] It can be understood that the first slide groove 71 limits the freedom of the first slider along the moving direction perpendicular to the first lock tongue 31. The second slide groove 72 limits the freedom of the second slider along the moving direction perpendicular to the first lock tongue 31. The first rack 51 slides in the lock housing 1 along the telescopic direction of the first lock tongue 31 and the second rack 52 slides in the lock housing 1 along the telescopic direction of the second lock tongue 41.

[0204] Further, in a specific embodiment provided in the present application, the first slide groove 71 is provided with a first limiting portion, the second slide groove 72 is provided with a second limiting portion, the end of the first slider abuts against the first limiting portion, and the end of the second slider abuts against the second limiting portion;

[0205] When the first locking tongue 31 drives the first rack 51 to retract, the first gear 53 meshing with the first rack 51 rotates, and the second rack 52 meshing with the first gear 53 tends to move in the retracting direction. The end of the second slider fixedly connected to the second rack 52 abuts against the second limiting portion, so that the first gear 53 moves along the retracting direction of the first rack 51, and the slider rotatably connected to the first gear 53 moves along the retracting direction.

[0206] When the second locking tongue 41 drives the second rack 52 to retract, the first gear 53 meshing with the second rack 52 rotates, and the first rack 51 meshing with the first gear 53 tends to move in the retraction direction. The end of the first slider fixedly connected to the first rack 51 abuts against the first limiting portion, so that the first gear 53 moves along the retraction direction of the second rack 52, and the slider rotatably connected to the first gear 53 moves along the retraction direction.

[0207] In the present application, the first limiting portion may be the inner end surface of the first sliding groove 71 close to the first locking tongue 31 . The second limiting portion may be the inner end surface of the second sliding groove 72 close to the second locking tongue 41 .

[0208] It is understandable that in the mechanism of the double rack and pinion combination, if one rack moves and the other rack is not limited, the pinion only rotates but does not move. Under the condition that the second lock body 4 is damaged and the second lock tongue 41 moves freely in the extension direction, the second rack 52 moves freely in the extension direction. When the first lock tongue 31 drives the first rack 51 to retract, the first gear 53 rotates, and the second rack 52 moves in the opposite direction to the first rack 51. At this time, since the second rack 52 is not restricted from moving, the first gear 53 will not move in the direction of the first lock tongue 31 retracting, and thus will not drive the middle slider 54 to move in the direction of the first lock tongue 31 retracting, and the square tongue 2 will not move. Therefore, the second limiting portion limits the sliding freedom of the second slider on the second slide groove 72 toward the extension direction of the second lock tongue 41, so that the first gear 53 moves in the direction of the first lock tongue 31 retracting, thereby increasing the practicality of the safety lock 100.

[0209] Likewise, the first limiting portion limits the sliding freedom of the first slider on the first sliding groove 71 toward the extension direction of the first locking tongue 31 , thereby causing the first gear 53 to move toward the retraction direction of the second locking tongue 41 .

[0210] Further, in a specific embodiment provided in the present application, the first slide groove 71 is provided with a third limiting portion, the second slide groove 72 is provided with a fourth limiting portion, the end of the first slider away from the first limiting portion abuts against the third limiting portion, and the end of the second slider away from the second limiting portion abuts against the fourth limiting portion;

[0211] When the first locking tongue 31 drives the first rack 51 to extend, the first gear 53 meshing with the first rack 51 rotates, and the second rack 52 meshing with the first gear 53 tends to move in the extension direction. The end of the second slider fixedly connected to the second rack 52 abuts against the fourth limiting portion, so that the first gear 53 moves along the extension direction of the first rack 51, and the slider rotatably connected to the first gear 53 moves along the extension direction.

[0212] When the second locking tongue 41 drives the second rack 52 to retract, the first gear 53 meshing with the second rack 52 rotates, and the first rack 51 meshing with the first gear 53 tends to move in the extension direction. The end of the first slider fixedly connected to the first rack 51 abuts against the third limiting portion, so that the first gear 53 moves along the extension direction of the second rack 52, and the slider rotatably connected to the first gear 53 moves along the extension direction.

[0213] In the present application, the third limiting portion may be the inner end surface of the first sliding groove 71 away from the first locking tongue 31 . The fourth limiting portion may be the inner end surface of the second sliding groove 72 away from the second locking tongue 41 .

[0214] It is understandable that in the mechanism of the double rack and pinion combination, if one rack moves and the other rack is not limited, the pinion only rotates but does not move. Under the condition that the second lock body 4 is damaged and the second lock tongue 41 moves freely in the telescopic direction, the second rack 52 moves freely in the telescopic direction. When the first lock tongue 31 drives the first rack 51 to extend and move, the first gear 53 rotates, and the second rack 52 moves in the opposite direction to the first rack 51. At this time, since the second rack 52 is not restricted from moving, the first gear 53 will not move in the direction of the extension of the first lock tongue 31, thereby not driving the middle slider 54 to move in the direction of the extension of the first lock tongue 31, and the square tongue 2 will not move. Therefore, the fourth limiting portion limits the sliding freedom of the second slider on the second slide groove 72 toward the retraction direction of the second lock tongue 41, so that the first gear 53 moves in the direction of the extension of the first lock tongue 31, increasing the practicality of the safety lock 100.

[0215] Likewise, the third limiting portion limits the sliding freedom of the first slider on the first sliding groove 71 toward the retraction direction of the first locking tongue 31 , thereby allowing the first gear 53 to move toward the extension direction of the second locking tongue 41 .

[0216] Furthermore, in a specific embodiment provided in the present application, the first sliding block is matched with the first sliding groove 71 with a very small clearance, and the second sliding block is matched with the second sliding groove 72 with a very small clearance.

[0217] In the present application, the first slider is matched with the groove side of the first slide 71 with a very small gap. The second slider is matched with the groove side of the second slide 72 with a very small gap. It can be understood that the very small gap not only ensures that there is a gap for mutual sliding between the first slider and the first slide 71 and is easy to install, but also ensures that the displacement between the first slider and the groove side of the first slide 71 will not be too large, and the meshing accuracy between the first rack 51 and the first gear 53 is ensured. The very small gap between the second slider and the second slide 72 not only ensures that there is a gap for mutual sliding and is easy to install, but also ensures that the displacement between the second slider and the groove side of the second slide 72 will not be too large, and the effective meshing between the second rack 52 and the first gear 53 is ensured, the phenomenon of gear slippage is avoided, and the movement accuracy of the square tongue 2 is improved.

[0218] Please refer to Figure 3 Further, in a specific implementation manner provided in the present application, the safety lock 100 further includes:

[0219] A connecting rod 55 rotatably connected to the first gear 53, wherein the connecting rod 55 is coaxial with the first gear 53;

[0220] A limiting platform 56 is detachably connected to the connecting rod 55 , and the limiting platform 56 presses the middle slider 54 against one side of the first gear 53 .

[0221] In the present application, the connecting rod 55 is rotatably connected to the first gear 53 via a bearing. The limit platform 56 and the connecting rod 55 may be threadedly connected. Specifically, the connecting rod 55 may be a step screw. The limit platform 56 may be a rivet nut. The inner end face of the step at one end of the step screw provided with a step abuts against the inner ring of the bearing. One end of the thread of the step screw is threadedly connected to the rivet nut. The end face of the rivet nut abuts against the intermediate slider 54. By utilizing the preload force between the threaded pairs of the threaded connection, the rivet nut and the step screw jointly limit the degree of freedom of the intermediate slider 54 and the first gear 53 along the axial direction of the step screw, thereby avoiding the first gear 53 and the intermediate slider 54 from loosening during movement, ensuring that the movement of the first gear 53 is transmitted to the intermediate slider 54, ensuring the movement of the square tongue 2, and improving the practicality of the safety lock 100.

[0222] It should be pointed out that the safety lock 100 here can be used as a component in a storage device that can be independently packaged, produced and sold, or in other words, the safety lock 100 can be produced and sold as an independent product in a storage device.

[0223] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0224] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0225] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A double lock body differential safety lock, characterized in that: include: Lock case; A square tongue slidably connected to the lock housing; A first lock body provided with a first lock tongue, used for driving the first lock tongue to retract during a first unlocking action, the first lock body being arranged inside a lock housing, and the first lock tongue being slidably connected to the lock housing; A second lock body provided with a second lock tongue, used for driving the second lock tongue to retract during a second unlocking action, the second lock body being arranged inside the lock housing, and the second lock tongue being slidably connected to the lock housing; A first rack fixedly connected to the first locking tongue, wherein the first rack is slidably connected to the lock housing; a second rack fixedly connected to the second locking tongue, wherein the second rack is slidably connected to the lock housing; a first gear meshing with the first rack, the first gear also meshing with a second rack; An intermediate slider rotatably connected to the first gear, the intermediate slider being able to slide in the lock housing and push the square tongue to move synchronously; When the first lock tongue retracts, the first rack fixedly connected to the first lock tongue retracts, the first gear meshing with the first rack rotates, the middle slider rotatably connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state; When the second lock tongue retracts, the second rack fixedly connected to the second lock tongue retracts, the first gear meshing with the second rack rotates, the middle slider rotationally connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state.

2. The double lock body differential safety lock according to claim 1, characterized in that: Also includes: A third rack fixedly connected to the middle slider; A second gear rotatably connected to the lock housing, wherein the second gear is meshed with a third rack; A fourth rack is slidably connected to the lock housing, the fourth rack is meshed with the second gear, and the fourth rack is connected to the square tongue.

3. The double lock body differential safety lock as claimed in claim 2, characterized in that: The second gear includes a first sector gear portion and a second sector gear portion, the first sector gear portion is meshed with the third rack, the second sector gear portion is meshed with the fourth rack, and the gear pitch circle diameter of the first sector gear portion is smaller than the gear pitch circle diameter of the second sector gear portion.

4. The double lock body differential safety lock as claimed in claim 2, characterized in that: The square tongue is provided with a groove for the fourth rack to extend into.

5. The double lock body differential safety lock as claimed in claim 2, characterized in that: The fourth rack is fixedly connected with a protrusion, and the square tongue is provided with a groove for the protrusion to extend into.

6. The double lock body differential safety lock according to claim 1, characterized in that: Also includes: A base fixedly arranged on the lock shell, the first lock body is arranged on the base, the second lock body is arranged on the base, the middle slider is slidably connected to the base, the first rack is fixedly connected with the first slider, the second rack is fixedly connected with the second slider, the base is provided with a first sliding groove for sliding of the first slider and a second sliding groove for sliding of the second slider, the first sliding groove is arranged along the extension and retraction direction of the first lock tongue, and the second sliding groove is arranged along the extension and retraction direction of the second lock tongue.

7. The double lock body differential safety lock as claimed in claim 6, characterized in that: The first slide groove is provided with a first limiting portion, the second slide groove is provided with a second limiting portion, the end of the first slider abuts against the first limiting portion, and the end of the second slider abuts against the second limiting portion; When the first locking tongue drives the first rack to retract, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the retracting direction, and the end of the second slider fixedly connected to the second rack abuts against the second limiting portion, so that the first gear moves along the retracting direction of the first rack, and the slider rotatably connected to the first gear moves along the retracting direction; When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the retraction direction. The end of the first slider fixedly connected to the first rack abuts against the first limiting portion to make the first gear move along the retraction direction of the second rack, thereby moving the slider rotationally connected to the first gear along the retraction direction.

8. The double lock body differential safety lock according to claim 6, characterized in that: The first slide groove is provided with a third limiting portion, the second slide groove is provided with a fourth limiting portion, the end of the first slider away from the first limiting portion abuts against the third limiting portion, and the end of the second slider away from the second limiting portion abuts against the fourth limiting portion; When the first locking tongue drives the first rack to extend, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the extension direction, and the end of the second slider fixedly connected to the second rack abuts against the fourth limiting portion, so that the first gear moves along the extension direction of the first rack, and the slider rotationally connected to the first gear moves along the extension direction; When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the extension direction, and the end of the first slider fixedly connected to the first rack abuts against the third limiting portion to make the first gear move along the extension direction of the second rack, thereby moving the slider rotationally connected to the first gear along the extension direction.

9. The double lock body differential safety lock according to claim 6, characterized in that: The first sliding block is matched with the first sliding groove with a very small gap, and the second sliding block is matched with the second sliding groove with a very small gap.

10. The double lock body differential safety lock according to claim 1, characterized in that: Also includes: A connecting rod rotatably connected to the first gear, wherein the connecting rod is coaxial with the first gear; A limit platform is detachably connected to the connecting rod, and the limit platform presses the middle sliding block against one side of the first gear.

11. A storage device, characterized in that: The storage device comprises: Cavity; A door panel matched with the cavity is used to form a storage space with the cavity; A lock housing disposed on the door panel; A square tongue slidably connected to the lock housing; A first lock body provided with a first lock tongue, used for driving the first lock tongue to retract during a first unlocking action, the first lock body being arranged inside a lock housing, and the first lock tongue being slidably connected to the lock housing; A second lock body provided with a second lock tongue, used for driving the second lock tongue to retract during a second unlocking action, the second lock body being arranged inside the lock housing, and the second lock tongue being slidably connected to the lock housing; A first rack fixedly connected to the first locking tongue, wherein the first rack is slidably connected to the lock housing; a second rack fixedly connected to the second locking tongue, wherein the second rack is slidably connected to the lock housing; a first gear meshing with the first rack, the first gear also meshing with a second rack; An intermediate slider rotatably connected to the first gear, the intermediate slider being able to slide in the lock housing and push the square tongue to move synchronously; When the first lock tongue retracts, the first rack fixedly connected to the first lock tongue retracts, the first gear meshing with the first rack rotates, the middle slider rotatably connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state; When the second lock tongue retracts, the second rack fixedly connected to the second lock tongue retracts, the first gear meshing with the second rack rotates, the middle slider rotationally connected to the first gear moves in the retraction direction, the middle slider pushes the square tongue to retract synchronously, and the safety lock is in an unlocked state.

12. The storage device according to claim 11, characterized in that: Also includes: A third rack fixedly connected to the middle slider; A second gear rotatably connected to the lock housing, wherein the second gear is meshed with a third rack; A fourth rack is slidably connected to the lock housing, the fourth rack is meshed with the second gear, and the fourth rack is connected to the square tongue.

13. The storage device according to claim 12, characterized in that: The second gear includes a first sector gear portion and a second sector gear portion, the first sector gear portion is meshed with the third rack, the second sector gear portion is meshed with the fourth rack, and the gear pitch circle diameter of the first sector gear portion is smaller than the gear pitch circle diameter of the second sector gear portion.

14. The storage device according to claim 12, characterized in that: The square tongue is provided with a groove for the fourth rack to extend into.

15. The storage device according to claim 12, characterized in that: The fourth rack is fixedly connected with a protrusion, and the square tongue is provided with a groove for the protrusion to extend into.

16. The storage device according to claim 11, characterized in that: Also includes: A base fixedly arranged on the lock shell, the first lock body is arranged on the base, the second lock body is arranged on the base, the middle slider is slidably connected to the base, the first rack is fixedly connected with the first slider, the second rack is fixedly connected with the second slider, the base is provided with a first sliding groove for sliding of the first slider and a second sliding groove for sliding of the second slider, the first sliding groove is arranged along the extension and retraction direction of the first lock tongue, and the second sliding groove is arranged along the extension and retraction direction of the second lock tongue.

17. The storage device according to claim 16, characterized in that: The first slide groove is provided with a first limiting portion, the second slide groove is provided with a second limiting portion, the end of the first slider abuts against the first limiting portion, and the end of the second slider abuts against the second limiting portion; When the first locking tongue drives the first rack to retract, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the retracting direction, and the end of the second slider fixedly connected to the second rack abuts against the second limiting portion, so that the first gear moves along the retracting direction of the first rack, and the slider rotatably connected to the first gear moves along the retracting direction; When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the retraction direction. The end of the first slider fixedly connected to the first rack abuts against the first limiting portion to make the first gear move along the retraction direction of the second rack, thereby moving the slider rotationally connected to the first gear along the retraction direction.

18. The storage device according to claim 16, characterized in that: The first slide groove is provided with a third limiting portion, the second slide groove is provided with a fourth limiting portion, the end of the first slider away from the first limiting portion abuts against the third limiting portion, and the end of the second slider away from the second limiting portion abuts against the fourth limiting portion; When the first locking tongue drives the first rack to extend, the first gear meshing with the first rack rotates, and the second rack meshing with the first gear tends to move in the extension direction, and the end of the second slider fixedly connected to the second rack abuts against the fourth limiting portion, so that the first gear moves along the extension direction of the first rack, and the slider rotationally connected to the first gear moves along the extension direction; When the second locking tongue drives the second rack to retract, the first gear meshing with the second rack rotates, and the first rack meshing with the first gear tends to move in the extension direction, and the end of the first slider fixedly connected to the first rack abuts against the third limiting portion to make the first gear move along the extension direction of the second rack, thereby moving the slider rotationally connected to the first gear along the extension direction.

19. The storage device according to claim 16, characterized in that: The first sliding block is matched with the first sliding groove with a very small gap, and the second sliding block is matched with the second sliding groove with a very small gap.

20. The storage device according to claim 11, characterized in that: Also includes: A connecting rod rotatably connected to the first gear, wherein the connecting rod is coaxial with the first gear; A limit platform is detachably connected to the connecting rod, and the limit platform presses the middle sliding block against one side of the first gear.

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