Auxiliary lock and one-piece lock

Abstract

The utility model discloses an auxiliary lock and a one-piece lock, and belongs to the technical field of safety and theft prevention. The auxiliary lock comprises a shell, a spring bolt assembly, a transmission piece and a driving piece, wherein the spring bolt assembly is arranged on the shell in a sliding mode. The transmission part is rotatably arranged in the shell and provided with a connecting structure, the connecting structure is in sliding fit with the spring bolt assembly, the rotating center of the connecting structure and the rotating center of the transmission part are staggered, and a tooth-shaped part is fixedly arranged on the transmission part. The driving piece is in sliding fit with the shell, part of the driving piece is located in the shell, the driving piece is provided with a rack in the sliding direction of the driving piece, and the rack is meshed with the tooth-shaped part so that the driving piece can drive the transmission piece to rotate when sliding so as to drive the spring bolt assembly to slide in the first direction. According to the auxiliary lock, the rack and the tooth-shaped part are in meshing transmission, so that locking or unlocking of the auxiliary lock is achieved. Compared with a cam lever transmission mode, the transmission mode that the tooth-shaped part is meshed with the rack is shorter in transmission path, less in energy loss and less in energy waste.

Description

Technical Field

[0001] The present application belongs to the technical field of security and anti-theft, and specifically relates to a secondary lock and a combined lock. Background Art

[0002] A combined lock is a lock that integrates a main lock and a secondary lock. It has high security and convenience and is usually used in places that require high security, such as homes, offices or public places.

[0003] The secondary lock of the combined lock often uses a cam to drive the lever to move, and then uses the lever to drive the lock tongue of the secondary lock to retract and retract to achieve locking or unlocking of the secondary lock. The main drawback of this design is that the cam lever transmission method has a large torque loss and a lot of energy waste.

[0004] Therefore, how to reduce energy waste has become a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a secondary lock and a combined lock, which can solve the problem of excessive energy waste when locking or unlocking the secondary lock in the related art.

[0006] In a first aspect, an embodiment of the present application provides a secondary lock, comprising a housing, a bolt assembly, a transmission member and a driving member, wherein the bolt assembly is slidably disposed on the housing;

[0007] The transmission member is rotatably arranged in the housing, the transmission member is provided with a connecting structure, the connecting structure is slidably matched with the locking tongue assembly, and the connecting structure is staggered with the rotation center of the transmission member, and a toothed portion is fixedly arranged on the transmission member;

[0008] The driving member is slidably matched with the shell, and part of the driving member is located in the shell. The driving member is provided with a rack along its own sliding direction, and the rack is engaged with the toothed portion so that when the driving member slides, the transmission member is driven to rotate, thereby driving the locking tongue assembly to slide along the first direction.

[0009] In a second aspect, an embodiment of the present application further provides a combined lock, comprising a main lock body and a first sub-lock and a second sub-lock sequentially arranged along the sliding direction of the driving member, wherein the first sub-lock and the second sub-lock are the sub-locks as described above.

[0010] In the embodiment of the present application, the driving member is slid along the sliding direction of the driving member, and the driving member is meshed with the toothed portion on the transmission member through the rack to drive the transmission member to rotate. When the transmission member rotates, the transmission member is connected to the housing in rotation, and the transmission member only rotates around its rotation center without moving, that is, the position of the transmission member remains unchanged. Since the connecting structure of the transmission member and the bolt assembly are slidably matched, the bolt assembly can slide in the first direction relative to the housing of the secondary lock, and the connecting structure is staggered from the rotation center of the transmission member. When the transmission member rotates, the connecting structure generates a driving force to drive the bolt assembly to slide relative to the housing in the first direction, thereby completing the locking or unlocking of the secondary lock. It can be seen that the secondary lock provided in the embodiment of the present application utilizes the meshing transmission of the rack and the toothed portion to achieve the locking or unlocking of the secondary lock. Compared with the cam lever transmission mode, the mode of meshing transmission of the toothed portion and the rack has a shorter transmission path, less energy loss, and less energy waste.

[0011] In addition, the transmission stability between the cam and the lever in the prior art is poor, while the transmission stability of the toothed portion and the gear meshing transmission in the embodiment of the present application is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 An exploded view of the secondary lock disclosed in the embodiment of the present application;

[0013] Figure 2 A three-dimensional diagram of a transmission member disclosed in an embodiment of the present application;

[0014] Figure 3 It is a front view of the transmission member disclosed in the embodiment of the present application;

[0015] Figure 4 for Figure 3 AA section view;

[0016] Figure 5 A schematic diagram of the structure of a driving member disclosed in an embodiment of the present application;

[0017] Figure 6 This is a schematic diagram of the structure of the connecting column disclosed in the embodiment of the present application;

[0018] Figure 7 It is a structural schematic diagram of the lock tongue assembly disclosed in the embodiment of the present application;

[0019] Figure 8 This is a structural schematic diagram of the secondary lock in a locked state disclosed in an embodiment of the present application;

[0020] Fig. 9 This is a schematic diagram of the structure of the secondary lock in the unlocked state disclosed in the embodiment of the present application;

[0021] Fig.10 It is a structural schematic diagram of the first part of the housing disclosed in the embodiment of the present application;

[0022] Fig.11 It is a structural schematic diagram of the second part of the housing disclosed in the embodiment of the present application;

[0023] Fig.12 This is a schematic diagram of the structure of the one-piece lock disclosed in the embodiment of the present application.

[0024] Description of reference numerals:

[0025] 100-housing, 110-first part, 120-second part, 130-U-shaped connecting piece;

[0026] 200-lock tongue assembly, 210-plate, 210a-first slide groove, 210b-second slide groove, 220-tongue body;

[0027] 300-transmission member, 310-toothed portion, 310a-main body, 310b-transmission tooth, 320-protrusion;

[0028] 400-driving member, 410-guide bar, 420-driving bar, 430-rack;

[0029] 510-elastic member, 520-first positioning column, 530-first limiting platform; 540-second positioning column;

[0030] 600-connecting structure, 610-connecting column, 610a-limiting boss, 610b-second limiting step, 620-connecting sleeve;

[0031] 700-guide column, 710-first cylindrical section, 720-second cylindrical section;

[0032] 800-limit sleeve;

[0033] 900 - main lock body, 910 - first intermediate connecting piece, 920 - second intermediate connecting piece. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0035] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0036] The secondary lock and the integrated lock provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0037] Please refer to Figure 1-Figure 11 As shown, the embodiment of the present application discloses a secondary lock, including a housing 100 , a locking tongue assembly 200 , a transmission member 300 and a driving member 400 , wherein the locking tongue assembly 200 is slidably disposed on the housing 100 .

[0038] Specifically, the transmission member 300 is rotatably disposed in the housing 100 , and the transmission member 300 is provided with a connecting structure 600 , which is slidably matched with the locking tongue assembly 200 , and the rotation centers of the connecting structure 600 and the transmission member 300 are staggered, and a toothed portion 310 is fixedly disposed on the transmission member 300 .

[0039] The driving member 400 is slidably matched with the shell 100, and part of the driving member 400 is located in the shell 100. The driving member 400 is provided with a rack 430 along its own sliding direction, and the rack 430 is engaged with the toothed portion 310, so that when the driving member 400 slides, the transmission member 300 is driven to rotate, thereby driving the lock tongue assembly 200 to slide along the first direction.

[0040] In the embodiment of the present application, the driving member 400 is slid along the sliding direction of the driving member 400, and the driving member 400 is meshed with the toothed portion 310 on the transmission member 300 through the rack 430, driving the transmission member 300 to rotate. When the transmission member 300 rotates, the transmission member 300 is rotationally connected with the housing 100, and the transmission member 300 only rotates around its rotation center without moving, that is, the position of the transmission member 300 remains unchanged. Since the connecting structure 600 of the transmission member 300 and the lock tongue assembly 200 are slidably matched, the lock tongue assembly 200 can slide in the first direction relative to the housing 100 of the secondary lock, and the connecting structure 600 and the rotation center of the transmission member 300 are staggered. When the transmission member 300 rotates, the connecting structure 600 generates a driving force, driving the lock tongue assembly 200 to slide in the first direction relative to the housing 100, thereby completing the locking or unlocking of the secondary lock. It can be seen that the secondary lock provided in the embodiment of the present application uses the meshing transmission of the rack 430 and the toothed portion 310 to achieve the locking or unlocking of the secondary lock. Compared with the cam lever transmission method, the transmission method in which the toothed portion 310 and the rack 430 mesh with each other has a shorter transmission path, less energy loss, and less energy waste.

[0041] In addition, the cam and the lever mainly rely on the friction between them to achieve torque transmission, and the transmission stability between the two is poor. When the handle is used to unlock or lock, the hand feel is poor, while the auxiliary lock provided in the embodiment of the present application mainly relies on the meshing of the toothed portion 310 and the rack 430 to achieve torque transmission, and the toothed portion 310 and the gear meshing transmission have better transmission stability.

[0042] In another embodiment of the present application, refer to Figure 2 and Figure 3 As shown, the diameter of the first end of the transmission member 300 is larger than the diameter of the second end, the toothed portion 310 is superimposed on the first end, and the axes of the two coincide, and the connecting structure 600 is superimposed on the second end, and the axes of the two coincide. Since the rotation center of the transmission member 300 is the axis of the first end of the transmission member 300, compared with the second end of the transmission member 300, the first end of the transmission member 300 is closer to the rotation center of the transmission member 300, so the first end of the transmission member 300 has a shorter force arm and is subjected to greater force than the second end. By making the diameter of the first end of the transmission member 300 larger than the diameter of the second end, the first end of the transmission member 300 can better bear the load and the first end of the transmission member 300 is less likely to be damaged.

[0043] Of course, in other embodiments, the diameter of the first end of the transmission member 300 may be equal to the diameter of the second end of the transmission member 300 .

[0044] In an optional embodiment, if Figure 2 As shown, the toothed portion 310 includes, for example, a main body 310a and at least two transmission teeth 310b arranged along the circumference of the main body 310a. The main body 310a is, for example, stacked on the second end of the transmission member 300 in the above embodiment.

[0045] In another embodiment of the present application, refer to Figure 8 and Fig. 9 As shown, the transmission member 300 has a first surface opposite to the bolt assembly 200 and a second surface away from the bolt assembly 200, the connecting structure 600 is arranged on the first surface, and the toothed portion 310 is arranged on the second surface. In this way, the connecting structure 600 and the toothed portion 310 are respectively located on different sides of the transmission member 300, and interference is not likely to occur.

[0046] Of course, in other embodiments, the toothed portion 310 and the connecting structure 600 may both be disposed on a side of the connecting structure 600 opposite to the locking tongue assembly 200 .

[0047] In another embodiment of the present application, Figure 4 As shown, the connection structure 600 includes a connection column 610 and a connection sleeve 620, the connection column 610 is connected to the transmission member 300, the connection sleeve 620 is rotatably sleeved on the connection column 610, and the connection sleeve 620 is slidably matched with the lock tongue assembly 200. In this way, when the connection sleeve 620 and the lock tongue assembly 200 are slidably matched, the connection sleeve 620 itself will rotate, which can reduce the friction between the connection sleeve 620 and the lock tongue assembly 200, thereby reducing the wear of the connection sleeve 620 and the lock tongue assembly 200, and extending the service life of the two.

[0048] Optionally, in other embodiments, the connection structure 600 may also only include the connection column 610 , and the connection column 610 is used to slide with the bolt assembly 200 .

[0049] Furthermore, if Figure 6 As shown, one end of the connecting column 610 is connected to the transmission member 300, and the other end of the connecting column 610 is provided with a limiting boss 610a, which is located in the connecting sleeve 620, and a first limiting step is provided in the connecting sleeve 620, and the first limiting step is located between the limiting boss 610a and the transmission member 300. The limiting boss 610a and the transmission member 300 cooperate to limit the axial movement of the connecting sleeve 620, and there is a gap between the limiting boss 610a and the first limiting step, and between the connecting sleeve 620 and the transmission member 300. In this way, the limiting boss 610a and the transmission member 300 can limit the axial movement of the connecting sleeve 620, and there is a gap between the limiting boss 610a and the connecting sleeve 620, which can not only realize the positioning of the connecting sleeve 620, but also reduce the wear of the connecting sleeve 620.

[0050] In other embodiments, the limiting boss 610 a may not be provided, and the connecting sleeve 620 is sleeved on the connecting column 610 in an interference fit manner.

[0051] Furthermore, if Figure 4As shown, the transmission member 300 is provided with an opening, and the connecting column 610 is interference-fitted with the opening to be connected to the transmission member 300, and the connecting column 610 is provided with a second limiting step 610b, and the second limiting step 610b abuts against the transmission member 300 to limit the axial movement of the connecting column 610, thereby preventing the connecting column 610 from continuing to move into the opening. When the second limiting step 610b abuts against the transmission member 300, the connecting column 610 is installed in place. With such a configuration, a certain external force can be applied to move the connecting column 610 out of the opening, and then the connecting column 610 can be replaced. It can be understood that when the external force is applied, the magnitude of the external force applied to the connecting column is determined according to the actual situation, and will not be repeated here.

[0052] In other embodiments, the connecting column 610 may also be connected to the transmission member 300 by welding or gluing.

[0053] As a specific implementation, a second slide groove 210b can be set on the lock tongue assembly 200, and the connecting structure 600, more specifically, for example, the connecting sleeve 620 in the above embodiment is set in the second slide groove 210b to achieve sliding cooperation between the connecting structure 600 and the lock tongue assembly 200.

[0054] In another embodiment of the present application, Figure 5 As shown, the driving member 400 includes a driving bar 420 and a guide bar 410 .

[0055] Specifically, the driving bar 420 is slidably arranged in the housing 100, and the thickness direction of the driving bar 420 and the thickness direction of the bolt assembly 200 are parallel to the thickness direction of the housing 100, and the driving bar 420 and the bolt assembly 200 are sequentially arranged in the thickness direction of the housing 100, and the driving bar 420 is provided with a rack 430 along its own sliding direction. The first end of the guide bar 410 is located outside the housing 100, and the second end of the guide bar 410 extends into the housing 100 and is connected to the driving bar 420, and the guide bar 410 is slidably matched with the housing 100. In this way, the driving bar 420 and the bolt assembly 200 are stacked in the thickness direction of the housing 100, so that the thickness of the housing 100 can be smaller, and the volume of the secondary lock can be smaller. Of course, in other embodiments, at least one of the thickness direction of the driving bar 420 and the thickness direction of the bolt assembly 200 can also be perpendicular to the thickness direction of the housing 100.

[0056] Furthermore, the guide bar 410 is perpendicular to the driving bar 420, the thickness direction of the guide bar 410 is perpendicular to the thickness direction of the housing 100, and the side of the guide bar 410 perpendicular to its own thickness direction is in contact with the inner wall of the housing 100 extending along its own thickness direction. In this arrangement, one side of the guide bar 410 is in contact with the inside of the housing 100, the contact area between the guide bar 410 and the housing 100 is large, and the guide bar 410 slides more smoothly.

[0057] In other embodiments, the thickness direction of the guide bar 410 may also be parallel to the thickness direction of the shell 100, and the side of the guide bar 410 parallel to its own thickness direction is in contact with the inner wall of the shell 100 extending along its own thickness direction.

[0058] Furthermore, in other embodiments, Figure 5 As shown, the number of the guide bars 410 may be two, and the two guide bars 410 may be respectively connected to two ends of the driving bar 420 in the length direction.

[0059] In another embodiment of the present application, Figure 8 and Fig. 9 As shown, the secondary lock further includes: an elastic member 510, which is connected to both the housing 100 and the transmission member 300 and can drive the transmission member 300 to reset. In this way, the elastic member 510 can drive the transmission member 300 to reset automatically without manual reset by the user, which makes the secondary lock more convenient to use.

[0060] It can be understood that when the transmission member 300 is reset, the lock tongue assembly 200 is also driven to reset, for example, the lock tongue assembly 200 is switched from extending relative to the housing 100 to retracting relative to the housing 100, such as Figure 8 As shown, when the bolt assembly 200 is extended relative to the housing 100, the secondary lock is in a locked state, as shown in FIG. Fig. 9 As shown, when the bolt assembly 200 is retracted relative to the housing 100, the secondary lock is in an unlocked state. In addition, the bolt assembly 200 includes, for example, a plate 210 and a tongue 220, the tongue 220 is disposed on one side of the plate 210, the tongue 220 is fixedly connected to the plate 210, and the connecting structure 600 in the above embodiment is slidably matched with the plate 210, and the plate 210 is slidably matched with the housing 100.

[0061] Furthermore, the secondary lock further includes: a first positioning column 520 and a second positioning column 540 .

[0062] Specifically, if Figure 3As shown, a protrusion 320 is provided on the side of the transmission member 300, a first positioning column 520 is located on a side of the protrusion 320 close to the bolt assembly 200, a first end of the first positioning column 520 is connected to a side of the protrusion 320 facing the bolt assembly 200, and one end of the elastic member 510 is sleeved on the first positioning column 520. A second positioning column 540 is provided on the housing 100, and the other end of the elastic member 510 is sleeved on the second positioning column 540. In this way, the elastic member 510 can be positioned with the help of the transmission member 300, so that the transmission member 300 does not need to be extended as a whole to the height where the elastic member 510 is located, and it is only necessary to extend the thinner protrusion 320 from the transmission member 300 to the height where the elastic member 510 is located, so that the size of the transmission member 300 is small, which can save materials.

[0063] Furthermore, if Figure 4 As shown, a first limiting platform 530 is provided at the second end of the first positioning column 520, and the elastic member 510 abuts against the protrusion 320 and the first limiting platform 530. The protrusion 320 and the first limiting platform 530 can limit the axial movement of the elastic member 510 in the second positioning column 540 to prevent the elastic member 510 from separating from the first positioning column 520. Of course, in other embodiments, the first limiting platform 530 may not be provided.

[0064] In another embodiment of the present application, refer to Fig. 9 and Fig.10 As shown, the secondary lock further includes a guide column 700 and a limiting sleeve 800 , and both the guide column 700 and the limiting sleeve 800 are disposed in the housing 100 .

[0065] The bolt assembly 200 is provided with a first slide groove 210a in the first direction, the guide column 700 includes a first cylindrical section 710 and a second cylindrical section 720, the diameter of the first cylindrical section 710 is greater than the diameter of the second cylindrical section 720, the first end of the first cylindrical section 710 is connected to the housing 100, the second end of the first cylindrical section 710 is connected to the first end of the second cylindrical section 720, the second cylindrical section 720 is slidably matched with the first slide groove 210a, and the second end of the second cylindrical section 720 passes through the first slide groove 210a, the limiting sleeve 800 is sleeved on the second end of the second cylindrical section 720, and the diameter of the first cylindrical section 710 and the diameter of the limiting sleeve 800 are both greater than the width of the first slide groove 210a. In this way, the limiting sleeve 800 and the second end of the first cylindrical section 710 can limit the movement of the bolt assembly 200 in the axial direction of the second cylindrical section 720, so that the secondary lock runs more smoothly.

[0066] In other embodiments, the limiting sleeve 800 may not be provided, and the guide column 700 may only include a third cylindrical section, and the third cylindrical section is used to slide with the first sliding groove 210a.

[0067] Furthermore, there is a gap between the lock tongue assembly 200, the limiting sleeve 800 and the first cylindrical section 710 to reduce the friction between the lock tongue assembly 200, the limiting sleeve 800 and the first cylindrical section 710, thereby reducing the wear of the lock tongue assembly 200, the limiting sleeve 800 and the first cylindrical section 710.

[0068] Furthermore, if Figure 7 As shown, in order to make the locking tongue assembly 200 slide more smoothly, the number of the first sliding grooves 210a is at least two, and correspondingly, the number of the guide posts 700 and the limiting sleeves 800 are also at least two, and one first sliding groove 210a corresponds to one guide post 700 and one first limiting sleeve 800.

[0069] As a specific implementation, the connection structure 600 and the bolt assembly 200 can be slidably matched in the second direction, and the second direction can be perpendicular to the first direction. More specifically, for example, the second slide groove 210b in the above embodiment is arranged along the second direction, and the first slide groove 210a is perpendicular to the second slide groove 210b, so as to realize the sliding match between the transmission member 300 and the bolt assembly 200 in the second direction.

[0070] As a specific implementation method, Fig.10 and Fig.11 As shown, the shell 100 includes a first part 110, a second part 120 and a U-shaped connector 130, and a cavity is provided between the first part 110 and the second part 120. The transmission member 300, the driving member 400 and the U-shaped connector 130 are all disposed in the cavity, and two opposite side walls of the U-shaped connector 130 are detachably connected to the first part 110 and the second part 120, respectively, and the bottom wall of the U-shaped connector 130 is detachably connected to at least one of the first part 110 and the second part 120.

[0071] refer to Fig.12 As shown, a one-piece lock is also provided in an embodiment of the present application, which includes a main lock body 900 and a first sub-lock and a second sub-lock arranged in sequence along the sliding direction of the driving member 400, the first sub-lock and the second sub-lock are the sub-locks as described above, that is, the one-piece lock includes at least two sub-locks, the structure of the first sub-lock is the same as the structure of the sub-lock described above, and the structure of the second sub-lock is the same as the structure of the sub-lock described above.

[0072] As a specific implementation, the first secondary lock and the second secondary lock are, for example, respectively located on opposite sides of the main lock body 900, and the main lock body 900 is provided with a first intermediate connector 910 and a second intermediate connector 920, the first intermediate connector 910 is connected to the driving member 400 of the first secondary lock, and the second intermediate connector 910 is connected to the driving member 400 of the second secondary lock. The first intermediate connector 910 and the second intermediate connector 920 are, for example, both sheet metal parts, and the first intermediate connector 910 is, for example, fixedly connected to the driving member 400 of the first secondary lock, and the first intermediate connector 910 is, for example, fixedly connected to the driving member 400 of the second secondary lock.

[0073] More specifically, the first intermediate connector 910 can be connected to the guide bar 410 of the driving member 400, and the second intermediate connector 920 can be connected to the guide bar 410 of the driving member 400. In the specific use process, the main lock 900 drives the two guide bars 410 to move respectively through the first intermediate connector 910 and the second intermediate connector 920, and then uses the two guide bars 410 to drive the two driving bars 420 to move respectively, and then uses the racks 430 on each driving bar 420 to drive the toothed portion 310 and the transmission member 300 corresponding to each driving bar 420 to rotate.

[0074] Optionally, in other embodiments, the one-piece lock may also include a main lock body 900 and a secondary lock as described above, and the secondary lock is connected to the main lock body 900 through the first intermediate connector 910 or the second intermediate connector 920. Of course, the number of secondary locks may be more than three, and each secondary lock may be arranged in sequence along the sliding direction of the driving member 400. In this case, two adjacent secondary locks may be connected through a structure similar to the first intermediate connector 910 or the second intermediate connector 920.

[0075] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A secondary lock, characterized in that: It comprises a housing (100), a locking tongue assembly (200), a transmission member (300) and a driving member (400), wherein the locking tongue assembly (200) is slidably arranged on the housing (100); The transmission member (300) is rotatably arranged in the housing (100), the transmission member (300) is provided with a connecting structure (600), the connecting structure (600) is slidably matched with the locking tongue assembly (200), and the rotation centers of the connecting structure (600) and the transmission member (300) are staggered, and a toothed portion (310) is fixedly arranged on the transmission member (300); The driving member (400) is slidably matched with the housing (100), and a portion of the driving member (400) is located inside the housing (100). The driving member (400) is provided with a rack (430) along its own sliding direction, and the rack (430) is meshed with the toothed portion (310), so that when the driving member (400) slides, the transmission member (300) is driven to rotate, thereby driving the locking tongue assembly (200) to slide along the first direction.

2. The secondary lock according to claim 1, characterized in that: The diameter of the first end of the transmission member (300) is greater than the diameter of the second end, the toothed portion (310) is superimposed on the first end of the transmission member (300), and the axes of the two coincide with each other, and the connecting structure (600) is superimposed on the second end of the transmission member (300), and the axes of the two coincide with each other.

3. The secondary lock according to claim 1, characterized in that: The transmission member (300) has a first surface opposite to the locking tongue assembly (200) and a second surface away from the locking tongue assembly (200), the connecting structure (600) is arranged on the first surface, and the toothed portion (310) is arranged on the second surface.

4. The secondary lock according to claim 1, characterized in that: The connection structure (600) comprises a connection column (610) and a connection sleeve (620), wherein the connection column (610) is connected to the transmission member (300), the connection sleeve (620) is rotatably sleeved on the connection column (610), and the connection sleeve (620) is slidably matched with the locking tongue assembly (200).

5. The secondary lock according to claim 1, characterized in that: The driving member (400) comprises: A driving bar (420), wherein the driving bar (420) is slidably disposed in the housing (100), the thickness direction of the driving bar (420) and the thickness direction of the locking tongue assembly (200) are both parallel to the thickness direction of the housing (100), and the driving bar (420) and the locking tongue assembly (200) are sequentially disposed in the thickness direction of the housing (100), and the driving bar (420) is provided with the rack (430) along its own sliding direction; A guide bar (410), wherein a first end of the guide bar (410) is located outside the shell (100), a second end of the guide bar (410) extends into the shell (100) and is connected to the drive bar (420), the guide bar (410) and the shell (100) are slidably matched, the guide bar (410) is perpendicular to the drive bar (420), the thickness direction of the guide bar (410) is perpendicular to the thickness direction of the shell (100), and a side of the guide bar (410) perpendicular to its own thickness direction is in contact with an inner wall of the shell (100) extending along its own thickness direction.

6. The secondary lock according to claim 1, characterized in that: The secondary lock further comprises an elastic member (510), wherein the elastic member (510) is connected to both the housing (100) and the transmission member (300), and can drive the transmission member (300) to reset.

7. The secondary lock according to claim 6, characterized in that: The secondary lock also includes: A first positioning column (520), a protrusion (320) is provided on the side of the transmission member (300), the first positioning column (520) is located on a side of the protrusion (320) close to the locking tongue assembly (200), a first end of the first positioning column (520) is connected to a side of the protrusion (320) facing the locking tongue assembly (200), and one end of the elastic member (510) is sleeved on the first positioning column (520); A second positioning column (540), wherein the second positioning column (540) is disposed on the housing (100), and the other end of the elastic member (510) is sleeved on the second positioning column (540).

8. The secondary lock according to claim 7, characterized in that: A first limiting platform (530) is provided at the second end of the first positioning column (520), and the elastic member (510) abuts against both the protruding portion (320) and the first limiting platform (530).

9. The secondary lock according to claim 8, characterized in that: The secondary lock further comprises a guide column (700) and a limiting sleeve (800), wherein the guide column (700) and the limiting sleeve (800) are both arranged in the housing (100); The locking tongue assembly (200) is provided with a first slide groove (210a) in a first direction, and the guide column (700) includes a first cylindrical section (710) and a second cylindrical section (720), the diameter of the first cylindrical section (710) is larger than the diameter of the second cylindrical section (720), the first end of the first cylindrical section (710) is connected to the housing (100), the second end of the first cylindrical section (710) is connected to the first end of the second cylindrical section (720), the second cylindrical section (720) is slidably matched with the first slide groove (210a), and the second end of the second cylindrical section (720) passes through the first slide groove (210a), the limiting sleeve (800) is sleeved on the second end of the second cylindrical section (720), and the diameters of the first cylindrical section (710) and the limiting sleeve (800) are both larger than the width of the first slide groove (210a).

10. A one-piece lock, characterized in that: It comprises a main lock body (900) and a first sub-lock and a second sub-lock sequentially arranged along the sliding direction of the driving member (400), wherein the first sub-lock and the second sub-lock are sub-locks as described in any one of claims 1 to 9.

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