CN110277027B

CN110277027B - Linkage lock catch, LED box and LED display screen

Info

Publication number: CN110277027B
Application number: CN201910653231.5A
Authority: CN
Inventors: 袁满; 肖华勇; 何昆鹏; 吴振志; 吴涵渠
Original assignee: Shenzhen Aoto Electronics Co Ltd
Current assignee: Shenzhen Aoto Electronics Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2024-05-24
Anticipated expiration: 2039-07-19
Also published as: CN110277027A

Abstract

The invention relates to a linkage lock catch, an LED box body and an LED display screen, wherein the linkage lock catch comprises a handle assembly, a first rack and at least one drag hook component, and the handle assembly and the drag hook component are in meshed connection with the first rack; the handle assembly comprises a hand piece and a main transmission gear, wherein the hand piece is fixedly connected with the transmission gear, the transmission gear is connected with the first rack, and the transmission gear drives the first rack to move; the drag hook part comprises a driven gear and a drag hook, the driven gear is connected with the drag hook, the driven gear is connected with a first rack, the displacement of the first rack drives the driven gear to rotate, and the rotation of the driven gear drives the rotation of the drag hook. Through main drive gear, first rack and driven gear formation gear drive, a handle subassembly can drive the rotation of a plurality of drag hook parts, realizes locking and unblock, easy operation, and locking effect is stable.

Description

Linkage lock catch, LED box and LED display screen

Technical Field

The invention relates to the field of LED display, in particular to a linkage lock catch, an LED box body and an LED display screen.

Background

The LED has the characteristics of low energy consumption, high brightness, bright color, environmental protection and the like, and is widely applied to more and more scenes such as outdoor display, monitoring centers, advertisement/media display, stages and the like. The LED display screen is generally formed by splicing a plurality of unit boxes, and the plane and the reliability of a splicing plane are guaranteed through positioning columns and locking catches.

At present, the LED display screen is spliced, and more requirements are that the operation is simple, convenient and quick, and the LED display screen is stable and reliable. This is particularly evident in the rental field. In the existing splicing structure, the positioning of the box body is performed through the positioning column, and then the quick lock catches on the four side edges are operated to lock the adjacent box bodies. In the locking and unlocking operation, three to four steps are generally needed, the operation is complex, time and labor are wasted, and the efficiency is low.

Disclosure of Invention

Based on the above, it is necessary to provide a linkage lock catch, an LED box and an LED display screen aiming at the problems of complex operation and low efficiency of the existing splicing structure.

The embodiment of the invention provides a linkage lock catch, which comprises a handle assembly, a first rack and at least one drag hook component, wherein the handle assembly and the drag hook component are in meshed connection with the first rack; wherein,

The handle assembly comprises a hand piece and a main transmission gear, the hand piece is fixedly connected with the transmission gear, the transmission gear is connected with the first rack, and the transmission gear drives the first rack to move;

the drag hook part comprises a driven gear and a drag hook, wherein the driven gear is connected with the drag hook, the driven gear is connected with the first rack, the displacement of the first rack drives the driven gear to rotate, and the rotation of the driven gear drives the rotation of the drag hook.

In some embodiments, the retractor member further comprises a gear shaft and a damping device, the gear shaft is fixedly connected with the driven gear, the retractor is provided with a mounting hole, and the gear shaft is at least partially accommodated in the mounting hole; the damping device is arranged between the gear shaft and the drag hook.

In some embodiments, the gear shaft and the driven gear are positioned at different axial lead positions, and the gear shaft and the driven gear form an eccentric rotation structure.

In some embodiments, a receiving groove is formed in the side surface of the gear shaft, and the damping device is sleeved on the gear shaft and is partially received in the receiving groove.

In some embodiments, the handle assembly further comprises a shaft sleeve, a ratchet wheel and a clamping lock, the main transmission gear is further provided with a connecting column, the shaft sleeve is sleeved on the connecting column, and the ratchet wheel is arranged on the outer surface of the shaft sleeve; the clamping lock is arranged on the hand piece, and one end of the clamping lock is provided with a clamping head clamped with the ratchet wheel.

In some embodiments, the device further comprises a reduction gear, wherein the reduction gear is respectively connected with the main transmission gear and the first rack in a meshed manner.

In some embodiments, the retractor comprises at least one second rack and a relay gear, at least one of the retractor members is in meshed connection with the second rack; the relay gear is in meshed connection with the first rack and the second rack.

The embodiment of the invention also provides an LED box body, which comprises an LED display box body and at least one linkage lock catch, wherein the linkage lock catch is fixedly arranged at the edge of the LED display box body; the linkage lock catch is any one of the linkage lock catches.

In some embodiments, the linkage catch further comprises a second rack and a relay gear, at least one of the drag hook components is in meshed connection with the second rack; the relay gear is in meshed connection with the first rack and the second rack;

the LED box body comprises 2 linkage locks.

The invention further provides an LED display screen, which comprises a supporting frame and a plurality of LED boxes, wherein the LED boxes are any one of the LED boxes, the LED boxes are arranged on the supporting frame, and adjacent LED boxes are spliced through linkage locks.

According to the linkage lock catch provided by the embodiment of the invention, the main transmission gear and the driven gear are respectively arranged on the handle component and the drag hook component, the first racks connected with the main transmission gear and the driven gear are utilized to form a gear transmission structure, the rotation of the handle component can drive the rotation of a plurality of drag hook components, the drag hook and the adjacent matching shaft are controlled to be switched between clamping and separating states, locking and unlocking are realized, the operation is simple, and the locking effect is stable.

Drawings

FIG. 1 is a schematic diagram of a linkage lock according to an embodiment of the present invention;

FIG. 2 is an exploded view of a retractor member in accordance with one embodiment of the invention;

FIG. 3 is a schematic cross-sectional view along line AA' of FIG. 1;

FIG. 4 is an exploded view of a handle assembly according to one embodiment of the present invention;

FIG. 5 is a schematic diagram of a main gear according to an embodiment of the present invention;

FIG. 6 is a schematic view of a handle assembly partially assembled according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view taken along line BB' in FIG. 6;

FIG. 8 is a schematic view of a retractor assembly in accordance with one embodiment of the present invention in various configurations;

FIG. 9 is a schematic view of a linkage lock catch according to another embodiment of the present invention;

FIG. 10 is a schematic view of a linkage lock catch according to another embodiment of the present invention in another view;

FIG. 11 is an enlarged partial view of region C of FIG. 10;

FIG. 12 is an exploded view of a ganged shackle in accordance with another embodiment of the present invention;

fig. 13 is a schematic structural diagram of an LED housing according to an embodiment of the present invention.

Detailed Description

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. The embodiments of the present application and the features in the embodiments may be combined with each other without collision.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1-6, an embodiment of the present invention provides a linkage lock catch 100, which includes a handle assembly 110, a first rack 130, and at least one drag hook component 120, wherein the handle assembly 110, the drag hook component 120 are engaged with the first rack 130; wherein,

The handle assembly 110 comprises a hand piece 111 and a main transmission gear 112, wherein the hand piece 111 is fixedly connected with the transmission gear 112, the transmission gear 112 is connected with the first rack 130, and the transmission gear 112 drives the first rack 130 to move;

The drag hook part 120 includes a driven gear 121 and a drag hook 122, the driven gear 121 is connected with the first rack 130, displacement of the first rack 130 drives the driven gear 121 to rotate, and rotation of the driven gear 121 drives rotation of the drag hook 122.

The number of the retractor members 120 can be determined according to actual needs. As shown in fig. 1, the ganged shackle 100 may include a handle assembly 110, 2 retractor members 120, and a first rack 130. The first rack 130 is provided with teeth that are engageable with the handle assembly 110 and the retractor member 120. The first rack 130 may have teeth on one end surface, or may have teeth only in a desired area, such as the corresponding areas of the handle assembly 110 and the retractor member 120. The first rack 130 may be a rigid rack or a flexible-based rack, such as a belt-like rack. When the first rack 130 is a belt-shaped rack, the first rack 130 is in a ring shape.

As shown in fig. 2 and 3, the retractor member 120 includes at least a driven gear 121 and a retractor 122, and the retractor 122 may be directly and fixedly connected to the driven gear 121 or indirectly connected to the driven gear through other structures. The driven gear 121 is meshed with the first rack 130, and displacement of the first rack 130 can drive the driven gear 121 to rotate, so as to drive the draw hook 122 to rotate, so that the draw hook 122 is switched between clamping and separating states with the adjacent matching shaft 2200.

The displacement of the first rack 130 is driven by the handle assembly 110. As shown in fig. 4 to 6, the handle assembly 110 at least includes a hand piece 111 and a main transmission gear 112, and the hand piece 111 is fixedly connected with the main transmission gear 112. The main drive gear 112 is connected to a first rack 130. The hand piece 111 may be a handle, a cross bar, a pull ring, etc., as long as it is convenient for manual operation. In the example shown in fig. 4 to 6, the hand piece 111 is a handle.

The fixed connection mode of the hand piece 111 and the main transmission gear 112 can be screw fixation, clamping or other limiting modes, so long as the mutual fixation between the hand piece 111 and the main transmission gear 112 can be ensured, and the rotation of the hand piece 111 can be realized to drive the main transmission gear 112 to rotate together. In the example shown in fig. 4 to 6, the end of the main transmission gear 112 near the hand piece 111 is provided with a boss having at least one corner, and the hand piece 111 is provided with a receiving groove corresponding to the boss, and the shape of the receiving groove is matched with that of the boss. Through setting up boss and the accepting groove that matches that has the edges and corners, can let hand piece 111 and main drive gear 112 keep fixed connection, realize hand piece 111 to main drive gear 112's drive effect, avoid the phenomenon of skidding. It will be appreciated that a boss may be provided on the hand piece 111 and a receiving slot may be provided on the main drive gear 112.

The connection between the main drive gear 112 and the first rack 130 may be a direct meshing connection or may be an indirect connection through other components. Preferably, in order to lock the device with a larger weight and improve the locking strength and stability of the latch, as shown in fig. 4, the handle assembly 110 further includes a reduction gear 113, and the reduction gear 113 is in meshed connection with the main transmission gear 112 on one hand and the first rack 130 on the other hand. By providing the reduction gear 113, the torque is increased, the force applied to the first rack 130 is increased, and the locking device is suitable for locking a device with a large weight.

When the locking is needed, the hand piece 111 is rotated in one direction, and the first rack 130 is driven to move through the main transmission gear 112; the first rack 130 is displaced, and simultaneously drives the driven gear 121 on the drag hook component 120 to rotate, so as to drive the drag hook 122 to rotate, and the drag hook 122 is clamped with the matching shaft 2200 on the adjacent device. Thus, locking can be achieved. Because the gear is utilized for transmission, when the locking is carried out, the gear is meshed, and the stability effect during the locking can be effectively ensured.

When unlocking is needed, the hand piece 111 is rotated in the opposite direction, and the first rack 130 is driven to move back through the main transmission gear 112; the first rack 130 drives the driven gear 121 on the drag hook component 120 to rotate reversely, and then drives the drag hook 122 to rotate reversely, and the driven gear 121 is separated from the matching shaft 2200 on the adjacent device, so that unlocking is realized.

In this embodiment, the main transmission gear 112 and the driven gear are respectively disposed on the handle assembly 110 and the drag hook component 120, and the first rack 130 connected with the main transmission gear and the driven gear are utilized to form a gear transmission structure, the rotation of the handle assembly 110 can drive the rotation of the drag hook components 120, the drag hook 122 and the adjacent matching shaft 2200 are controlled to switch between the clamping state and the separating state, so as to realize locking and unlocking, and the operation is simple, and the locking effect is stable.

As shown in fig. 2 and 3, the retractor member 120 further includes a gear shaft 123 and a damping device 124, the gear shaft 123 is fixedly connected with the driven gear 121, the retractor 122 is provided with a mounting hole, and at least part of the gear shaft 123 is accommodated in the mounting hole; the damping device 124 is disposed between the gear shaft 123 and the drag hook 122 to provide friction between the gear shaft 123 and the drag hook 122, and rotation of the gear shaft 123 drives the drag hook 122 to rotate.

The mounting hole on the drag hook 122 can be a blind hole or a through hole. In the embodiment shown in fig. 2 and 3, the mounting hole is a through hole, and the gear shaft 123 is accommodated in the mounting hole. The side of the gear shaft 123 is provided with a receiving groove, and the damping device 124 is sleeved on the gear shaft 123 and is partially received in the receiving groove. The damping means 124 may be embodied as a rubber ring, a washer, etc., as long as it provides a friction force between the gear shaft 123 and the drag hook 122.

The fixed connection between the gear shaft 123 and the driven gear 121 may be implemented in various manners, such as screw fixation, clamping, or other limiting manners. In some embodiments, between the gear shaft 123 and the driven gear 121, one is provided with a boss having at least one corner, and the other is provided with a receiving groove having a corresponding matching shape, and the fixed connection between the gear shaft 123 and the driven gear 121 is achieved through the cooperation of the boss and the receiving groove.

The fixed connection between the gear shaft 123 and the driven gear 121 may be concentric—the axis of the gear shaft 123 coincides with the axis of the driven gear 121; or eccentric-the axial line position of the gear shaft 123 and the driven gear 121 is different.

Preferably, as shown in fig. 3 and 8, the axial line positions of the gear shaft 123 and the driven gear 121 are different. At this time, the end face of the gear shaft 123 is larger than the end face of the driven gear 121, and the gear shaft 123 and the driven gear 121 constitute an eccentric rotation structure. As shown in fig. 8, when the driven gear 121 is driven to rotate by the first rack gear 130, the driving gear shaft 123 makes eccentric rotation. The damping device 124 provided between the gear shaft 123 and the drag hook 122 provides friction, and the eccentric rotation of the gear shaft 123 drives the drag hook 122 to rotate together. At the same time, the eccentric rotation of the gear shaft 123 drives the draw hook 122 to approach or separate from the linkage lock catch 100. At the time of locking, as shown in fig. 8, since the magnitude of the frictional force provided by the damping device 124 is limited, when the drag hook 122 contacts with the mating shaft 2200 of the adjacent device, the drag hook 122 receives the reaction force provided by the mating shaft 2200, stopping the rotation; but the eccentric rotation of the gear shaft 123 will drive the retractor 122 to move in a direction that would be expected to approach the interlock latch 100 to tighten the adjacent device. Therefore, the gear shaft 123 and the driven gear 121 are arranged at different axial lead positions to form an eccentric rotation structure, so that the linkage lock catch 100 can realize locking, and the distance between adjacent devices can be adjusted at the same time.

As shown in fig. 4, 6 and 7, the handle assembly 110 may further include a sleeve 114, a ratchet 115 and a latch lock 116, the main transmission gear 112 is further provided with a connecting post, the sleeve 114 is sleeved on the connecting post, and the ratchet 115 is disposed on the outer surface of the sleeve 114; the latch 116 is mounted on the hand piece 111, and one end of the latch 116 is provided with a chuck for latching with the ratchet 115.

The end face of the main transmission gear 112 may be provided with a connection post, and the boss is provided on the end face of the connection post. The sleeve 114 is sleeved on the connecting post of the main transmission gear 112. The sleeve 114 may be fixedly connected to the device to which the interlock 100 is mounted; it is also possible to provide the handle assembly 110 with a base to which the sleeve 114 is fixedly connected. Ratchet 115, which can be separated from sleeve 114, is a separate component; or may be integrally formed with the sleeve 114, and the ratchet 115 may be formed by forming a groove stripe on the surface of the sleeve 114.

The latch 116 is mounted on the hand piece 111, and one end of the latch 116 is provided with a chuck. The chuck may be held with the ratchet 115 to lock the hand piece 111 and limit rotation of the hand piece 111. The chuck can be separated from the ratchet 115 by operating the chuck lock 116 to release the hand piece 111, and the hand piece 111 can be freely rotated.

As shown in fig. 4, 6 and 7, the handle assembly 110 may further include a torsion spring 117, the latch lock 116 is rotatably mounted on the hand piece 111 through a rotation shaft, the torsion spring 117 is sleeved on the rotation shaft, one end of the torsion spring 117 is connected with the latch lock 116, and the other end is connected with the hand piece 111. By providing the torsion spring 117, the reset of the detent lock 116, such as resetting to a locked state, can be assisted, so that misoperation of the handle assembly 110 caused by unexpected acting force can be avoided, and the stability of the locked state is improved. It will be appreciated that other return structures, such as compression springs, may be used to effect return of the detent lock.

As shown in fig. 9-12, the linkage lock catch 100 further comprises at least one second rack 140 and a relay gear 150, and the at least one drag hook component 120 is in meshed connection with the second rack 140; the relay gear 150 is engaged with the first rack 130 and the second rack 140, respectively.

The ganged shackle 100 may be provided with at least one second rack 140. In this manner, one handle assembly 110 can be made to simultaneously control locking and unlocking operations with adjacent devices on at least 2 sides. In the example shown in fig. 9-12, the ganged shackle 100 is provided with a second rack 140, thereby effecting locking and unlocking of one handle assembly 100 control 2 side with an adjacent device. When two second racks 140 are provided, the two second racks 140 are provided at both ends of the first rack, respectively, thereby achieving locking and unlocking of one handle assembly 100 control 3 side with an adjacent device. When three second racks 140 are provided, the first racks 130 and the second racks 140 are enclosed to form a square shape, and the second racks 140 are also meshed through a relay gear for transmission. Thus, one handle assembly 100 can control locking and unlocking of the 4-side with an adjacent device.

As shown in fig. 9-12, the linkage lock catch 100 further includes a positioning pin 190, the first rack 130 and/or the second rack 140 are correspondingly provided with a positioning slot 131, the positioning pin 190 is inserted into the positioning slot 131, and when the first rack 130 and/or the second rack 140 move to a preset position, the positioning pin 190 abuts against the inner wall of the positioning slot 131, so as to realize positioning and limiting effects, and further improve stability of locking.

In order to effectively promote the positioning and limiting effects, the positioning groove 131 may be a broken line or a curved track.

In order to provide support for the first rack 130 and/or the second rack 140, the ganged shackle 100 also includes a support shaft 160, as shown in figures 8-12.

As shown in fig. 2,4, and 9-12, the ganged shackle 100 may further include a plurality of mounting blocks 101, and the handle assembly 110, the retractor member 120, and the relay gear 150 may be disposed on the mounting blocks 101. Thus, the assembly and installation of the interlock latch 100 can be facilitated.

The interlock latch 100 may further include a housing, in which various components of the interlock latch 100 may be mounted, with the hand piece 111 and the draw hook 122 at least partially exposed. The handle assembly 110, the retractor member 120, the relay gear 150, the first rack 130, the second rack 140, the positioning pin 190, and the support shaft 160 may all be partially or completely disposed within the housing. Thus, when the interlock latch 100 is to be installed, only the housing needs to be installed on the target device. It should be understood that the housing may not be required, and each component of the interlock latch 100 may be directly mounted at a corresponding position on the target device.

The linkage lock catch provided in this embodiment sets up main drive gear 112 and driven gear on handle subassembly 110 and drag hook part 120 respectively, utilizes the first rack 130 who is connected with it, forms gear drive structure, and the rotation of handle subassembly 110 can drive the rotation of a plurality of drag hook parts 120, and control drag hook 122 and adjacent cooperation axle 2200 switch between holding, separation two kinds of states, realize locking and unblock, easy operation, and the locking effect is stable.

Another embodiment of the present invention provides an LED box 10, as shown in fig. 13, including an LED display box 200 and at least one linkage lock 100, where the linkage lock 100 is fixedly disposed at an edge of the LED display box 200. The interlock latch 100 is any of the interlock latches described in the previous embodiments.

The LED display box body comprises a box body frame and an LED lamp panel, and the LED lamp panel is fixed on the box body frame. The edge of the LED display box body is fixedly provided with a linkage lock catch 100.

The linkage lock catch 100 may be provided with only the first rack 130, and the LED box 10 may include 4 linkage lock catches 100, which are respectively and fixedly disposed at edges of 4 sides of the LED display box 200, so that locking and unlocking of the 4 sides of the LED display box 200 can be achieved.

The linkage lock catch 100 may include a first rack 130 and a second rack 140, and the LED box 10 may include 2 linkage locks, i.e. locking and unlocking of 4 sides of the LED display box 200 may be achieved.

The linkage lock catch 100 can further comprise a first rack 130 and three second racks 140, and the LED display box body 200 can be locked and unlocked on 4 sides only by 1 linkage lock catch 100.

Preferably, as shown in fig. 13, the interlocking latch 100 includes a first rack 130 and a second rack 140, and the led housing 10 includes 2 interlocking latches. At this moment, the hand piece distributes in the both sides of LED box, when the installation LED box, the hand piece of both sides can be held respectively to two hands, when the installation is put in place, when needs splice with adjacent box, rotates the hand piece, can realize locking, easy operation. When the axial lead positions of the gear shaft and the driven gear are different, eccentric rotation can be formed, adjacent boxes are tensioned, and the distance between the adjacent boxes is adjusted.

The LED box provided in this embodiment, through setting up the linkage hasp, set up main drive gear 112 and driven gear respectively on handle subassembly 110 and drag hook part 120, utilize the first rack 130 who is connected with it, form gear drive structure, the rotation of handle subassembly 110 can drive the rotation of a plurality of drag hook part 120, control drag hook 122 locking or unblock adjacent LED box, easy operation, the locking effect is stable.

The embodiment of the invention also provides an LED display screen, which comprises a supporting frame and a plurality of LED boxes, wherein the LED boxes are the LED boxes in the previous embodiment; the LED boxes are mounted on the supporting frame, and adjacent LED boxes are spliced through the linkage lock catch.

The LED display screen provided in this embodiment, through setting up the linkage hasp, set up main drive gear 112 and driven gear respectively on handle subassembly 110 and drag hook part 120, utilize the first rack 130 who is connected with it, form gear drive structure, the rotation of handle subassembly 110 can drive the rotation of a plurality of drag hook part 120, control drag hook 122 locking or unblock adjacent LED box, easy operation, the locking effect is stable.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The linkage lock catch is characterized by comprising a handle assembly, a first rack and at least one drag hook component, wherein the handle assembly and the drag hook component are in meshed connection with the first rack; wherein,

The handle assembly comprises a hand piece and a main transmission gear, the hand piece is fixedly connected with the main transmission gear, the main transmission gear is connected with the first rack, and the main transmission gear drives the first rack to move;

The drag hook component comprises a driven gear and a drag hook, the driven gear is connected with the first rack, the displacement of the first rack drives the driven gear to rotate, and the rotation of the driven gear drives the drag hook to rotate; the drag hook component further comprises a gear shaft and a damping device, the gear shaft is fixedly connected with the driven gear, the drag hook is provided with a mounting hole, and the gear shaft is at least partially accommodated in the mounting hole; the damping device is arranged between the gear shaft and the drag hook; the gear shaft and the driven gear are different in axial lead position, and form an eccentric rotating structure.

2. The linkage lock catch according to claim 1, wherein a receiving groove is formed in a side surface of the gear shaft, and the damping device is sleeved on the gear shaft and is partially received in the receiving groove.

3. The linkage lock catch according to claim 1, wherein the handle assembly further comprises a shaft sleeve, a ratchet wheel and a clamping lock, the main transmission gear is further provided with a connecting column, the shaft sleeve is sleeved on the connecting column, and the ratchet wheel is arranged on the outer surface of the shaft sleeve; the clamping lock is arranged on the hand piece, and one end of the clamping lock is provided with a clamping head clamped with the ratchet wheel.

4. The ganged-shackle of claim 1, further comprising a reduction gear in meshed connection with the main drive gear, the first rack, respectively.

5. The ganged-catch of any of claims 1 to 4, further comprising at least one second rack and a relay gear, at least one of the retractor members being in meshed connection with the second rack; the relay gear is in meshed connection with the first rack and the second rack.

6. The LED box body is characterized by comprising an LED display box body and at least one linkage lock catch, wherein the linkage lock catch is fixedly arranged at the edge of the LED display box body; the interlock latch is the interlock latch according to any one of claims 1 to 4.

7. The LED housing of claim 6, wherein said ganged shackle further comprises a second rack and relay gear, at least one of said retractor members being in meshed engagement with said second rack; the relay gear is in meshed connection with the first rack and the second rack;

the LED box body comprises 2 linkage locks.

8. An LED display screen, includes braced frame and a plurality of LED box, its characterized in that, the LED box is the LED box of claim 6 or 7, the LED box is installed braced frame is last, and adjacent LED box splices through the linkage hasp.