Locking connection device, LED box and LED display screen

A locking connection device, an LED box and an LED display screen are provided. The device includes a locking module and an inserting module. The locking module includes a hook and a bump matching with each other. The inserting module includes a fixing pin and a fixing hole matching with each other. The fixing pin and hook are fixed on a first base, and the bump and the fixing hole are fixed on a second base. The locking connection device further includes a driving module that propels the hook and the fixing pin to move synchronously. When the driving module finishes a travel, the hook and the bump are securely connected, and the fixing pin and the fixing hole are securely connected. Since the locking module according to the present invention locks the movement of the first base and the second base along the axial direction of the fixing pin and meanwhile the inserting module locks a circumferential movement of the fixing pin, the first base and the second base are securely fixed. Additionally, the sizes of the fixing pin, the fixing hole, the hook and the bump can be selected to match the weight of the box to lock and connect heavy boxes, thus realizing a convenient installation.

BACKGROUND OF THE INVENTION

The present invention relates to a mechanical field, in particularly, to a locking connection device, an LED box, and an LED display screen.

An LED display screen is a joint of plural LED boxes. The LED box has a light weight and may be connected in various ways, such as louvers bolt which is easy and convenient and provides a rapid connection and detachment.

Chinese utility model application No. 200920104934.4, entitled “Unit structure of box body framework for LED display screen capable of realizing quick installation”, discloses a box body device for a LED display screen capable of increasing the installation speed and realizing quick installation. The device comprises a square framework; a connecting pin is arranged on the outer lateral surface at the top of the framework; a connecting hole and a connecting inserted pin matching with the connecting pin are arranged at the bottom of the framework; and a lock tongue and a lock catch which match with each other are respectively arranged on the left lateral surface and the right lateral surface of the framework. However, this pin connection is highly limited to the loaded weight, and is not applicable to the joint of the boxes.

In the prior art, the joint of the boxes with a high loaded weight is generally realized by fixing a fixed metal piece having a relatively high strength with screws to connect and lock tightly. Two ends of the metal piece are fixed on two adjacent boxes by the screws, thereby realizing the fixed connection. However, this method of connecting the boxes is time and labour consuming in practical operations. Moreover, the boxes generally are heavy and need to be assembled by lots of people working collaboratively, which spends much time and requires lots of labour and materials.

BRIEF SUMMARY OF THE INVENTION

The present invention is mainly directed to solve a technical problem of providing a locking connection device which realizes a rapid connection and detachment and is adapted to connect heavy boxes, an LED box, and an LED display screen.

To solve the above technical problem, the present invention employs the following technical solution: there is provided a locking connection device, which includes a locking module and an inserting module. The locking module includes a hook and a bump matching with each other. The inserting module includes a fixing pin and a fixing hole matching with each other. The fixing pin and the hook are fixed on a first base, and the bump and the fixing hole are fixed on a second base. The locking connection device further includes a driving module that is used to propel the hook and the fixing pin to move synchronously, during which the hook is directed to the bump and the fixing pin is directed to the fixing hole. When the driving module finishes a travel, the hook and the bump are securely connected, and the fixing pin and the fixing hole are securely connected.

The driving module includes a handle, a pin clip, a sliding rail, a hook, a guide rail, two fixing members, two guide pillars and a rotating shaft. An axle wheel is disposed at one end of the handle. The axle wheel is provided with a first hole and a second hole. The first hole is eccentrically disposed on the axle wheel. A third hole is formed at one end of the hook. Two fixing members pass the second hole and the guide rail from two sides respectively to dynamically connect the handle and the pin clip together. Another rotating shaft passes the first hole and the third hole to connect the handle and the hanging hook. The first base is provided with two guide pillars on two sides thereof. The guide pillars pass the sliding rail. A fixing pin is fixed on one end of the pin clip. The axle wheel, during cam moving, propels pin clip to move along the sliding rail. A flat spring is fixed on the first base.

The locking connection device further includes a safety mechanism for preventing the handle from not being pressed in place or not being bounced away, and the safety mechanism is installed on the first base.

There are two axle wheels on the handle, which two are disposed parallel to each other at an interval, and one end of the hook is disposed between the two axle wheels.

The safety mechanism comprises a stop plate and a restoring spring. The stop plate is provided with a trip. One end of the restoring spring is fixed on the trip and the other end is fixed on the first base.

To solve the above technical problem, the present invention employs another solution as follow: there is provided an LED box, which includes an LED display component and an LED box frame. The LED display component and the LED box frame are securely connected, and the LED box is provided with a plurality of locking connection devices. The locking connection device includes a locking module and an inserting module. The locking module includes a hook and a bump matching with each other. The inserting module includes a fixing pin and fixing hole matching with each other. The fixing pin and the hook are fixed on the first base, and the bump and the fixing hole are fixed on second base. The locking connection device further has a driving module that propels the hook and the fixing pin moving synchronously; the hook is directed to the bump, and the fixing pin is directed to the fixing hole. When the driving module finishes a travel, the hook and the bump are securely connected, and the fixing pin and the fixing hole are securely connected.

The driving module includes a handle, a pin clip, a sliding rail, a hook, a guide rail and two fixing members, two guide pillars and a rotating shaft. An axle wheel is disposed at one end of the handle. The axle wheel is provided with a first hole and a second hole. The first hole is eccentrically disposed on the axle wheel. A third hole is formed at one end of the hook. Two fixing members pass the second hole and the guide rail from two sides respectively to dynamically connect the handle and the pin clip together. Another rotating shaft passes the first hole and the third hole to connect the handle and the hanging hook. The first base is provided with two guide pillars on two sides thereof. The guide pillars pass the sliding rail. A fixing pin is fixed on one end of the pin clip. The axle wheel, during cam moving, propels pin clip to move along the sliding rail. The flat spring is fixed on the first base.

The locking connection device further includes a safety mechanism for preventing the handle from not being pressed in place or not being bounced away, and the safety mechanism is installed on the first base.

The safety mechanism includes a stop plate and a restoring spring. The stop plate is provided with a trip. One end of the restoring spring is fixed on the trip and the other end is fixed on the first base.

To solve the above technical problem, the present invention further employs another technical solution as follows: there is provided an LED display screen including a plurality of LED display boxes which are connected by the locking connection device according to any one of claims1to6.

The present invention has the following beneficial effects: Directed to solving the defects existing in the prior art that the heavy boxes are fixed by the fixed metal piece and screws, which needs lots of people working collaboratively to assembly, takes much time, and requires lots of labour and materials, the locking connection device according to the present invention securely fixes the first base and the second base by the coordination of the locking module and the inserting modules, in which the locking module locks the movement of the first base and the second base along the axial direction of the fixing pin and in the meantime, and the inserting module locks a circumferential movement of the fixing pin. Additionally, the sizes of the fixing pin and the fixing hole can be selected to match the weight of the box, so as to lock and connect heavy boxes and realize a convenient installation.

Since the locking connection device according to the present invention is provided with the fixing pin and the hook, what is needed is to substantially align two objects to be locked and have the hook to be put up, that is, hanging the hook on the bump of the second base and rotating to engage the handle. In the course of rotating the handle, the axle wheel of the handle propels the pin clip to move on the guide pillar and the pin clip drives the fixing pin inserted into the fixing hole of the second base. This coordination manner of the fixing pin and the fixing hole can ensure the two objects to be arranged neatly, and when the handle rotates, the handle can be hauled tightly by the hook so as to drive the hook to retreat, thereby securely connecting the two objects together. The locking connection device according to the present invention employs the mechanical parts linked structure inside, thereby realizing a simple and convenient locking connection process and a secure and tight connection, and further greatly saving the labour and materials spent in the assembling and maintenance processes and thus reducing the cost.

DETAILED DESCRIPTION OF THE INVENTION

To make the objectives, technical solutions, structural features, and advantages of the present invention become more apparent, the present invention is further described below in detail with reference to the accompanying drawings and embodiments.

Referring toFIG. 1toFIG. 12, the locking connection device according to the embodiment of the present invention includes a locking module and an inserting module. The locking module includes a hook2and a bump42matching with each other. The bump42includes a screw421and a member422. The inserting module includes a fixing pin6and a fixing hole41matching with each other. The fixing pin6and the hook2are fixed on a first base3. The bump42and the fixing hole41are fixed on a second base4. The screw421is fixed on the second base4via a screw hole, and can be adjusted to eliminate the machining error of a die. The member422is a part of the second base4. The locking connection device further includes a driving module that propels the hook2and the fixing pin6moving synchronously. The hook2is directed to the bump42and the fixing pin6is directed to the fixing hole41. When the driving module finishes a travel, the hook2and the bump42are securely connected, and the fixing pin6and the fixing hole41are securely connected.

Since the locking connection device according to the present invention is provided with the fixing pin6and the hook2, two objects are merely needed to be substantially aligned and tied to the hook2, that is, hanging the hook2on the bump42of the second base4and rotating to engage the handle1. In the course of rotating the handle1, the axle wheel11of the handle1propels pin clip5to move on the guide pillar31and the pin clip5drives the fixing pin6to insert into the fixing hole41of the second base4. This coordination manner of the fixing pin6and the fixing hole41can ensure that the two objects are arranged neatly, and when the handle1rotates, the handle1drives the hook2to retreat, thus making the hook2draw the bump42of the second base4tightly, thereby securely connecting the two objects together. The locking connection device according to the present invention employs the mechanical parts linked structure inside, thereby realizing a simple and convenient locking connection process and a secure and tight connection, and further greatly saving the labour and materials spent in the assembling and maintenance processes and thus reducing the cost.

In an exemplary embodiment, the driving module includes a handle1, a pin clip5, a sliding rail51, a guide rail52, two fixing members, two guide pillars31and a rotating shaft. An axle wheel11is disposed at one end of the handle1. The axle wheel11is provided with a first hole12and a second hole13. The first hole12is eccentrically disposed on the axle wheel11. A third hole21is formed at one end of the hook2. Two fixing members pass the second hole13and the guide rail52from two sides respectively to dynamically connect the handle1and the pin clip5together. Another rotating shaft passes the first hole12and the third hole21to connect the handle1and the hook2. The first base3is provided with two guide pillars31on two sides thereof. The guide pillars31pass the sliding rail51. A fixing pin6is fixed on one end of the pin clip5. The axle wheel11during cam moving propels pin5to move along the sliding rail51. A flat spring7is fixed on the first base3.

In an exemplary embodiment, the locking connection device further includes a safety mechanism8for preventing the handle1from not being pressed in place or not being bounced away, and the safety mechanism8is installed on the first base3.

In an exemplary embodiment, there are two axle wheels11on the handle1. The two axle wheels11are disposed parallel to each other at an interval, and one end of the hook2is disposed between the two axle wheels11.

In an exemplary embodiment, the safety mechanism8includes a stop plate81and a restoring spring83. The stop plate81has a trip82. One end of the restoring spring83is fixed on the trip82and the other end is fixed on the first base3.

The working principle of the locking connection device according to the present invention for locking the two objects is described as follows. Since the locking connection device according to the present invention is provided with the fixing pin6and the hook2, what is needed is to substantially align two objects and have the hook2to be put up, that is, hanging the hook2on the bump42of the second base4and rotating to engage the handle1. In the course of rotating the handle1, the axle wheel11of the handle1propels the pin clip5to move on the guide pillar31and the pin clip5drives the fixing pin6to insert into the fixing hole41of the second base4. This coordination manner of the fixing pin6and the fixing hole41can ensure that the two objects are arranged neatly, and when the handle1rotates, the handle1drives the hook2to retreat, thus making the hook2draw the bump42of the second base4tightly, thereby securely connecting the two objects together. Now, the safety mechanism8restores the balancing state under the resilience of the spring, thus ensuring that the handle1is pressed in place and will not be bounced away.

The working principle of the locking connection device according to the present invention for locking and unlocking to separate the two objects is described as follows. The unlocking action is just reverse to the locking action. Firstly, the safety mechanism8is unlocked, and the handle1is rotated to make the hook2forwardly move, and thus the bump42on the second base4is released and meanwhile the fixing pin6is disengaged from the fixing hole41, thereby separating the two objects.

The locking connection device according to the present invention employs the mechanical parts linked structure inside, thereby realizing a simple and convenient locking connection process and a secure and tight connection, and also greatly saving the labour and materials spent in the assembling and maintenance processes and thus reducing the cost.

The above descriptions are merely taken as the preferred embodiment of the present invention, but not intended to restrict the scope of the present invention. Any equivalent structures or variants that are made by using contents of the description and drawings of the present invention, or any direct or indirect applications thereof are included in the protection scope of the claims of the present invention.