Patent Description:
A large-sized light-emitting diode (LED) display device is formed by splicing several smaller LED boxes, and it is required to connect power wires and data wires to each other to splice the smaller LED boxes into a larger whole. Generally, power wires and data wires are connected for splicing. However, since the wires are distributed at the backs of the spliced LED boxes and complicatedly connected, the device looks untidy. In addition, non-staff can cut off the connection, such that the problem of insecurity is likely to occur.

Prior art document <CIT> discloses a plug-in connection assembly for an LED display device with first and second plug-in connection members and an intermediate structure comprising third and fourth plug-in connection members that connect to the first and second members respectively in a connected state. It lacks a driving member for actively moving these intermediate plug-in members, relying on a more passive connection mechanism.

The main objective of the invention is to provide a plug-in connection assembly of a light-emitting diode (LED) display device, an LED box assembly and an LED display device, so as to solve the problem of insecurity caused because wires are distributed at backs of LED boxes.

In order to realize the above objective, an aspect of the invention provides a plug-in connection assembly of an LED display device. The plug-in connection assembly of an LED display device includes a first plug-in connection member; a second plug-in connection member spaced apart from the first plug-in connection member; and an intermediate structure arranged between the first plug-in connection member and the second plug-in connection member. The intermediate structure includes a third plug-in connection member and a fourth plug-in connection member that are spaced apart from each other, and a driving member for driving the third plug-in connection member and the fourth plug-in connection member to move, and the third plug-in connection member and the fourth plug-in connection member are connected with each other by a wire. The driving member has an initial position and a pushing position. When the driving member is in the initial position, the third plug-in connection member and the fourth plug-in connection member are close to each other, the third plug-in connection member is separated from the first plug-in connection member, and the fourth plug-in connection member is separated from the second plug-in connection member. When the driving member is in the pushing position, the third plug-in connection member and the fourth plug-in connection member are away from each other, the third plug-in connection member is connected with the first plug-in connection member in a plug-in manner, and the fourth plug-in connection member is connected with the second plug-in connection member in a plug-in manner.

Further, the intermediate structure further includes a separator for separating the third plug-in connection member from the fourth plug-in connection member, and the driving member is rotatably arranged at the separator.

Further, the separator includes a separation frame arranged between the third plug-in connection member and the fourth plug-in connection member and a connection plate arranged at the separation frame, and the driving member is rotatably arranged at the connection plate.

Further, the driving member includes a rotary shaft, a driving block arranged at a first end of the rotary shaft, and an operation portion arranged at a second end of the rotary shaft. An axis of the rotary shaft is perpendicular to a moving direction of the third plug-in connection member or the fourth plug-in connection member, the rotary shaft rotatably penetrates the connection plate, and the driving block may push the third plug-in connection member and the fourth plug-in connection member, so as to drive the third plug-in connection member and the fourth plug-in connection member to be away from each other.

Further, the intermediate structure further includes a rotary sleeve sleeving the rotary shaft and fixed to the rotary shaft, the rotary sleeve includes a sleeve body located between the connection plate and the rotary shaft, and a stop plate arranged at an end of the sleeve body away from the operation portion, and the stop plate and the operation portion are located on two sides of the connection plate respectively.

Further, the intermediate structure further includes an elastic member connected between the third plug-in connection member and the fourth plug-in connection member, and the elastic member exerts an elastic force on the third plug-in connection member and the fourth plug-in connection member, so as to move the third plug-in connection member and the fourth plug-in connection member from positions away from each other to positions close to each other.

Further, the intermediate structure further includes a locking member movably arranged on the driving member, a first locking portion and a second locking portion that are spaced apart from each other are arranged on the separator, when the driving member is in the pushing position, the locking member may match the first locking portion in a locking manner, and when the driving member is in the initial position, the locking member may match the second locking portion in a locking manner.

Further, the intermediate structure further includes a fixing plate and two limiting folded plates arranged at two ends of the fixing plate, a part of the separator is fixed at a middle position of the fixing plate, and the third plug-in connection member and the fourth plug-in connection member are located between the two limiting folded plates.

Further, a first positioning structure is arranged between the third plug-in connection member and the first plug-in connection member, and a second positioning structure is arranged between the fourth plug-in connection member and the second plug-in connection member.

Another aspect of the invention provides an LED box assembly. The LED box assembly includes a first box, a second box and a plug-in connection assembly. The plug-in connection assembly is the above plug-in connection assembly of an LED display device, the first box and the second box are arranged adjacent to each other, the first box includes a first side plate, the second box includes a second side plate adjacent to the first side plate, a first plug-in connection member of the plug-in connection assembly is arranged at the first side plate, and a second plug-in connection member of the plug-in connection assembly is arranged at the second side plate.

Another aspect of the invention provides an LED display device. The LED display device includes an LED box assembly and an LED display screen arranged on a front side of the LED box assembly, and the LED box assembly is the above LED box assembly.

By applying the technical solution of the invention, a plug-in connection assembly of an LED display device includes a first plug-in connection member, a second plug-in connection member and an intermediate structure. The first plug-in connection member and the second plug-in connection member may be mounted on two adjacent LED boxes respectively, such that the second plug-in connection member is spaced apart from the first plug-in connection member. The intermediate structure is arranged between the first plug-in connection member and the second plug-in connection member, and the intermediate structure includes a third plug-in connection member and a fourth plug-in connection member that are spaced apart from each other, and a driving member for driving the third plug-in connection member and the fourth plug-in connection member to move, and the third plug-in connection member and the fourth plug-in connection member are connected with each other by a wire. In the invention, the driving member has an initial position and a pushing position. When the driving member is in the initial position, the third plug-in connection member and the fourth plug-in connection member are close to each other, the third plug-in connection member is separated from the first plug-in connection member, and the fourth plug-in connection member is separated from the second plug-in connection member. When the driving member is in the pushing position, the third plug-in connection member and the fourth plug-in connection member are away from each other, the third plug-in connection member is connected with the first plug-in connection member in a plug-in manner, and the fourth plug-in connection member is connected with the second plug-in connection member in a plug-in manner. The first plug-in connection member, the second plug-in connection member and the intermediate structure may integrate power wires and data wires together to realize connection and disconnection. In this way, the movable third plug-in connection member and fourth plug-in connection member are arranged between LED boxes, the third plug-in connection member is connected with the first plug-in connection member in a plug-in manner, and the fourth plug-in connection member is connected with the second plug-in connection member in a plug-in manner, so as to realize communication. The intermediate structure is connected with, in a plug-in manner, and separated from the first plug-in connection member and the second plug-in connection member to replace adjacent power wires and data wires, such that connection is simple, and backs of the LED boxes may be tidy after the LED boxes are spliced. Moreover, staff may easily cut off the connection, so as to improve security of operation. Therefore, the technical solution of the invention may solve the problem of insecurity caused because wires are distributed at backs of LED boxes.

The accompanying drawings of the description, which constitute part of the invention, are used to provide further understanding of the invention, and illustrative examples of the invention and the description thereof are used to explain the invention, but are not intended to unduly limit the invention. In the accompanying drawings:.

The above accompanying drawings include the following reference numerals:
<NUM>: first plug-in connection member; <NUM>: second plug-in connection member; <NUM>: intermediate structure; <NUM>: third plug-in connection member; <NUM>: fourth plug-in connection member; <NUM>: driving member; <NUM>, rotary shaft; <NUM>, driving block; <NUM>, operation portion; <NUM>, wire; <NUM>: separator; <NUM>: separation frame; <NUM>, connection plate; <NUM>, first locking portion; <NUM>, second locking portion; <NUM>, rotary sleeve; <NUM>, sleeve body; <NUM>, stop plate; <NUM>: elastic member; <NUM>: locking member; <NUM>, fixing plate; <NUM>, limiting folded plate; <NUM>: first box; and <NUM>: second box.

The technical solutions of the examples of the invention will be clearly and completely described below in combination with the accompanying drawings in the examples of the invention. Apparently, the described examples are merely some examples rather than all examples of the invention.

As shown in <FIG> and <FIG>, a plug-in connection assembly of a light-emitting diode (LED) display device in the embodiment includes: a first plug-in connection member <NUM>, a second plug-in connection member <NUM> and an intermediate structure <NUM>. The second plug-in connection member <NUM> is spaced apart from the first plug-in connection member <NUM>. The intermediate structure <NUM> is arranged between the first plug-in connection member <NUM> and the second plug-in connection member <NUM>, and the intermediate structure <NUM> includes a third plug-in connection member <NUM> and a fourth plug-in connection member <NUM> that are spaced apart from each other, and a driving member <NUM> for driving the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> to move, and the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are connected with each other by a wire <NUM>. In the embodiment, the driving member <NUM> has an initial position and a pushing position. When the driving member <NUM> is in the initial position, the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are close to each other, the third plug-in connection member <NUM> is separated from the first plug-in connection member <NUM>, and the fourth plug-in connection member <NUM> is separated from the second plug-in connection member <NUM>. When the driving member <NUM> is in the pushing position, the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are away from each other, the third plug-in connection member <NUM> is connected with the first plug-in connection member <NUM> in a plug-in manner, and the fourth plug-in connection member <NUM> is connected with the second plug-in connection member <NUM> in a plug-in manner.

By applying the technical solution of the example, the first plug-in connection member <NUM> and the second plug-in connection member <NUM> may be mounted on two adjacent LED boxes respectively, such that the second plug-in connection member <NUM> is spaced apart from the first plug-in connection member <NUM>. The intermediate structure <NUM> is arranged between the first plug-in connection member <NUM> and the second plug-in connection member <NUM>, and the intermediate structure <NUM> includes a third plug-in connection member <NUM> and a fourth plug-in connection member <NUM> that are spaced apart from each other, and a driving member <NUM> for driving the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> to move, and the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are connected with each other by a wire <NUM>. In the embodiment, the driving member <NUM> has an initial position and a pushing position. When the driving member <NUM> is in the initial position, the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are close to each other, the third plug-in connection member <NUM> is separated from the first plug-in connection member <NUM>, and the fourth plug-in connection member <NUM> is separated from the second plug-in connection member <NUM>. When the driving member <NUM> is in the pushing position, the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are away from each other, the third plug-in connection member <NUM> is connected with the first plug-in connection member <NUM> in a plug-in manner, and the fourth plug-in connection member <NUM> is connected with the second plug-in connection member <NUM> in a plug-in manner. The first plug-in connection member <NUM>, the second plug-in connection member <NUM> and the intermediate structure <NUM> may integrate power wires and data wires together to realize connection and disconnection. In this way, the movable third plug-in connection member <NUM> and fourth plug-in connection member <NUM> are arranged between LED boxes, the third plug-in connection member <NUM> is connected with the first plug-in connection member <NUM> in a plug-in manner, and the fourth plug-in connection member <NUM> is connected with the second plug-in connection member <NUM> in a plug-in manner, so as to realize communication. The intermediate structure <NUM> is connected with, in a plug-in manner, and separated from the first plug-in connection member <NUM> and the second plug-in connection member <NUM> to replace adjacent power wires and data wires, such that connection is simple, and backs of the LED boxes may be tidy after the LED boxes are spliced. Moreover, staff may easily cut off the connection, so as to improve security of operation. Therefore, the technical solution of the example may solve the problem of insecurity caused because wires are distributed at backs of LED boxes. In addition, the first plug-in connection member <NUM>, the second plug-in connection member <NUM> and the intermediate structure <NUM> may replace wire connection between boxes in the related art, such that after the whole LED display device is assembled, a rapid connection function between power sources and signals is realized, junctions between the boxes are controlled to be connected or disconnected, assembly or disassembly between the boxes by field personnel is facilitated, and the problem of difficulty in introducing external power sources and signals is solved.

It should be noted that in the situation that the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are close to each other, and the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are away from each other, "close to each other" is relative to "away from each other", that is, a distance between the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> when the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are close to each other is less than a distance between the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> when the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are away from each other. In order to prevent the wire <NUM> from being torn when the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are close to or away from each other, the wires <NUM> in the embodiment are relatively loose or elastic.

The above driving member drives the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> to linearly move.

Specifically, the first plug-in connection member <NUM> and the second plug-in connection member <NUM> are provided with plastic parts, power copper pins, signal copper pins, power welding wire positions, and signal printed circuit board (PCB) welding positions.

The third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are provided with power copper pins, signal copper pins, guide columns, power welding wire positions and signal PCB welding positions. The power copper pins are used for being connected with power copper holes of the plug-in connection members in a plug-in manner. The signal copper pins are used for being connected with signal copper holes of the plug-in connection members in a plug-in manner. The power welding wire positions are used for connecting welding wires to an internal power source of the LED display device. The signal PCB welding positions are used for welding a PCB and connecting a plug-in connection terminal welded on the PCB to a signal in the LED display device.

As shown in <FIG>, <FIG> and <FIG>, the intermediate structure <NUM> further includes a separator <NUM> separating the third plug-in connection member <NUM> from the fourth plug-in connection member <NUM>. The driving member <NUM> is rotatably arranged at the separator <NUM>. In a process that the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> get close to each other, the separator <NUM> is arranged to separate the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM>, so as to prevent collision caused because the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> continuously get close to each other.

As shown in <FIG>, <FIG> and <FIG>, the separator <NUM> includes a separation frame <NUM> arranged between the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM>, and a connection plate <NUM> arranged on the separation frame <NUM>. The driving member <NUM> is rotatably arranged at the connection plate <NUM>. The wire <NUM> between the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> may pass through a hollowed region of the separation frame <NUM>, and the hollowed region of the separation frame <NUM> may avoid a part of the driving member <NUM>. In this way, the separation frame <NUM> does not interfere with a part of the driving member <NUM> and the wire <NUM>, such that the structure of the intermediate structure <NUM> is compact. The connection plate <NUM> is arranged to conveniently support the driving member <NUM>, such that a part of the driving member <NUM> may smoothly stretch into the hollowed region of the separation frame <NUM>.

Specifically, the separation frame <NUM> includes a bottom separation plate, a first side plate and a second side plate that are arranged on two sides of the bottom separation plate, and a first vertical separation plate and a second vertical separation plate that are arranged between the first side plate and the second side plate, the first vertical separation plate and the second vertical separation plate are connected on a surface of the bottom separation plate at intervals, and the first side plate, the first vertical separation plate, the second vertical separation plate and the second side plate are sequentially located on the same surface of the bottom separation plate. A part of the driving member (driving block <NUM> hereinafter) is located between the first vertical separation plate and the second vertical separation plate, a part of a wire <NUM> (signal wire) is located between the first side plate and the first vertical separation plate, and another part of the wire <NUM> (power wire) is located between the second vertical separation plate and the second side plate. In this way, the wire <NUM> and the part of the driving member are located in respective independent spaces, so as to prevent interference with the wire <NUM> when a part of the driving member rotates. The above signal wire is used for transmitting signals, and the above power wire is used for transmitting voltages and currents.

Specifically, in order to enable the part of the driving member to stretch in the position between the first vertical separation plate and the second vertical separation plate, the connection plate <NUM> includes a square hole plate connected with the first side plate and the second side plate, and a rectangular plate nested within a hole of the square hole plate, and the driving member <NUM> is rotatably arranged in the rectangular plate.

As shown in <FIG>, <FIG> and <FIG>, the driving member <NUM> includes a rotary shaft <NUM>, a driving block <NUM> arranged at a first end of the rotary shaft <NUM>, and an operation portion <NUM> arranged at a second end of the rotary shaft <NUM>. An axis of the rotary shaft <NUM> is perpendicular to a moving direction of the third plug-in connection member <NUM> or the fourth plug-in connection member <NUM>. The rotary shaft <NUM> rotatably penetrates the connection plate <NUM>, and the driving block <NUM> may push the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM>, so as to drive the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> to be away from each other. The operation portion <NUM> is screwed to drive the rotary shaft <NUM> to rotate, and the driving block <NUM> may rotate together, such that the driving block <NUM> may implement pushing. For ease of machining and low friction against the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM>, the driving block <NUM> is in a flat key shape, and the operation portion <NUM> is a knob.

As shown in <FIG>, <FIG> and <FIG>, the intermediate structure <NUM> further includes a rotary sleeve <NUM> sleeving the rotary shaft <NUM> and fixed to the rotary shaft <NUM>. The rotary sleeve <NUM> includes a sleeve body <NUM> located between the connection plate <NUM> and the rotary shaft <NUM>, and a stop plate <NUM> arranged at an end of the sleeve body <NUM> away from the operation portion <NUM>. The stop plate <NUM> and the operation portion <NUM> are located on two sides of the connection plate <NUM> respectively. The rotary sleeve <NUM> separates the connection plate <NUM> from the rotary shaft <NUM>, to prevent abrasion caused because the rotary shaft <NUM> is in direct contact with the connection plate <NUM> during rotation, thereby proloning service life of the rotary shaft <NUM>. The stop plate <NUM> and the operation portion <NUM> match the connection plate <NUM> in a stopping manner to prevent the rotary shaft <NUM> from moving along an axis thereof, such that the rotary shaft <NUM> may only rotate.

As shown in <FIG> and <FIG>, the intermediate structure <NUM> further includes an anti-wear gasket sleeving the sleeve body <NUM>. In this way, the anti-wear gasket may separate the stop plate <NUM> from the connection plate <NUM> to prevent the stop plate <NUM> from being in direct contact with the connection plate <NUM>, so as to reduce friction occurring during rotation of the rotary sleeve <NUM>. The anti-wear gasket is preferably a plastic part.

As shown in <FIG>, <FIG> and <FIG>, in a process that the driving member <NUM> is switched from the pushing position to the initial position, in order to enable the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> to be automatically moved from the positions away from each other to positions close to each other, the intermediate structure <NUM> further includes an elastic member <NUM> connected between the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM>. The elastic member <NUM> applies an elastic force to the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM>, so as to move the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> from positions away from each other to positions close to each other. When the third plug-in connection member <NUM> is in contact with an upper end face of the separation frame <NUM>, and the fourth plug-in connection member <NUM> is in contact with a lower end face of the separation frame <NUM>, the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are located at positions close to each other. The elastic member <NUM> is preferably a tension spring, and the above elastic force is tension.

Specifically, in order to make tension applied by the elastic member to the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> more uniform, two elastic members <NUM> are arranged, and one elastic member <NUM> is connected with the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> and located between the first side plate and the first vertical separation plate. The other elastic member <NUM> is connected with the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> and located between the second vertical separation plate and the second side plate.

As shown in <FIG>, the intermediate structure <NUM> further includes a locking member <NUM> movably arranged on the driving member <NUM>. A first locking portion <NUM> and a second locking portion <NUM> that are spaced apart from each other are arranged on the separator <NUM>. When the driving member <NUM> is in the pushing position, the locking member <NUM> matches the first locking portion <NUM> in a locking manner. In this way, the third plug-in connection member <NUM> is maintained at a position for being connected with the first plug-in connection member <NUM> in a plug-in manner, and the fourth plug-in connection member <NUM> in maintained in a position for being connected with the second plug-in connection member <NUM> in a plug-in manner and is less likely to get loose. Moreover, it is guaranteed that the third plug-in connection member <NUM> may be reliably connected with the first plug-in connection member <NUM> in a plug-in manner, and the fourth plug-in connection member <NUM> may be reliably connected with the second plug-in connection member <NUM> in a plug-in manner, such that a desirable contact effect is maintained, and poor contact is avoided. When the driving member <NUM> is in the initial position, the locking member <NUM> may match the second locking portion <NUM> in a locking manner. In this way, the third plug-in connection member <NUM> is maintained at a position for being separated from the first plug-in connection member <NUM>, and the fourth plug-in connection member <NUM> is maintained at a position for being separated from the second plug-in connection member <NUM>, such that loosening is not likely to occur, and danger caused by misoperation is avoided.

Specifically, for screwing and ease of operation, the locking member <NUM> includes a bolt, the first locking portion <NUM> includes a first screw hole, and the second locking portion <NUM> includes a second screw hole.

As shown in <FIG>, the intermediate structure <NUM> further includes a fixing plate <NUM> and two limiting folded plates <NUM> arranged at two ends of the fixing plate <NUM>, a part of the separator <NUM> is fixed at a middle position of the fixing plate <NUM>, and the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are located between the two limiting folded plates <NUM>. The fixing plate <NUM> and the two limiting folded plates <NUM> limit the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> to guide linear movement of the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM>, such that the third plug-in connection member <NUM> is aligned with the first plug-in connection member <NUM>, and the fourth plug-in connection member <NUM> is aligned with the second plug-in connection member <NUM>. Therefore, the third plug-in connection member <NUM> may be quickly connected with the first plug-in connection member <NUM> in a plug-in manner, and the fourth plug-in connection member <NUM> may be quickly connected with the second plug-in connection member <NUM> in a plug-in manner. The fixing plate <NUM> and the two limiting folded plates <NUM> arranged on the two ends of the fixing plate <NUM> are plastic parts of an integral structure.

As shown in <FIG>, when the driving member <NUM> is in the initial position, the third plug-in connection member <NUM> and the fourth plug-in connection member <NUM> are close to each other, the third plug-in connection member <NUM> is separated from the first plug-in connection member <NUM>, and the fourth plug-in connection member <NUM> is separated from the second plug-in connection member <NUM>. In this way, the intermediate structure <NUM> is movably located between the first plug-in connection member <NUM> and the second plug-in connection member <NUM>. In order to enable the third plug-in connection member <NUM> to be smoothly connected with the first plug-in connection member <NUM> in a plug-in manner, and enable the fourth plug-in connection member <NUM> to be smoothly connected with the second plug-in connection member <NUM> in a plug-in manner, a first positioning structure is arranged between the third plug-in connection member <NUM> and the first plug-in connection member <NUM>, and a second positioning structure is arranged between the fourth plug-in connection member <NUM> and the second plug-in connection member <NUM>.

Specifically, in order to conveniently guide and position plug-in connection between the third plug-in connection member <NUM> and the first plug-in connection member <NUM>, the first positioning structure includes a first positioning column and a first positioning hole matching the first positioning column in a positioning manner, the first positioning hole is provided on the first plug-in connection member <NUM>, and the first positioning column is arranged on the third plug-in connection member <NUM>. In order to conveniently guide and position plug-in connection between the fourth plug-in connection member <NUM> and the second plug-in connection member <NUM>, the second positioning structure includes a second positioning column and a second positioning hole matching the second positioning column in a positioning manner, the second positioning hole is provided on the second plug-in connection member <NUM>, and the second positioning column is arranged on the fourth plug-in connection member <NUM>.

In the embodiment, the rotary shaft <NUM> is driven to rotate by rotating a knob such that the driving block <NUM> may simultaneously push the third plug-in connection member <NUM> to move upwards and push the fourth plug-in connection member <NUM> to move downwards. The third plug-in connection member <NUM> may be connected with the first plug-in connection member <NUM> in a plug-in manner, and the fourth plug-in connection member <NUM> may be connected with the second plug-in connection member <NUM> in a plug-in manner. In this way, the driving member <NUM> is in the pushing position, such that the first plug-in connection member <NUM>, the third plug-in connection member <NUM>, the fourth plug-in connection member <NUM> and the second plug-in connection member <NUM> may be in communication with each other. On the contrary, when the driving member <NUM> is switched from the pushing position to the initial position, under the pulling force of the elastic member, the third plug-in connection member <NUM> may be separated from the first plug-in connection member <NUM>, and the fourth plug-in connection member <NUM> may be separated from the second plug-in connection member <NUM>. In this way, the intermediate structure <NUM> may be moved out.

The invention further provides an LED box assembly. As shown in <FIG> and <FIG>, the LED box assembly in the embodiment includes a first box <NUM>, a second box <NUM> and a plug-in connection assembly, and the plug-in connection assembly is the above plug-in connection assembly of an LED display device. Since the above plug-in connection assembly of an LED display device may solve the problem of insecurity caused because wires are distributed at backs of LED boxes, the LED box assembly including the plug-in connection assembly may solve the same technical problem. The first box <NUM> and the second box <NUM> are arranged adjacent to each other, the first box <NUM> includes a first side plate, the second box <NUM> includes a second side plate adjacent to the first side plate, the first plug-in connection member <NUM> of the plug-in connection assembly is arranged at the first side plate, and the second plug-in connection member <NUM> of the plug-in connection assembly is arranged at the second side plate. Specifically, the first side plate is provided with a first avoiding hole for avoiding one part of the intermediate structure <NUM>, and the second side plate is provided with a second avoiding hole for avoiding the other part of the intermediate structure <NUM>.

Claim 1:
A power and data plug-in connection assembly for a light-emitting diode (LED) display device, comprising:
a first plug-in connection member (<NUM>) suitable to be arranged at a first side plate of a first box of a LED box assembly of the LED display device;
a second plug-in connection member (<NUM>) spaced apart from the first plug-in connection member (<NUM>) and suitable to be arranged at a second side plate of a second box of the LED box assembly of the LED display device;
characterized in that, the power and data plug-in connection assembly further comprises:
an intermediate structure (<NUM>) arranged between the first plug-in connection member (<NUM>) and the second plug-in connection member (<NUM>), wherein the intermediate structure (<NUM>) comprises a third plug-in connection member (<NUM>) and a fourth plug-in connection member (<NUM>) that are spaced apart from each other, and a driving member (<NUM>) for driving the third plug-in connection member (<NUM>) and the fourth plug-in connection member (<NUM>) to move, and the third plug-in connection member (<NUM>) and the fourth plug-in connection member (<NUM>) are connected with each other by a wire (<NUM>); wherein
the driving member (<NUM>) has an initial position and a pushing position; when the driving member (<NUM>) is in the initial position, the third plug-in connection member (<NUM>) and the fourth plug-in connection member (<NUM>) are close to each other, the third plug-in connection member (<NUM>) is separated from the first plug-in connection member (<NUM>), and the fourth plug-in connection member (<NUM>) is separated from the second plug-in connection member (<NUM>); and when the driving member (<NUM>) is in the pushing position, the third plug-in connection member (<NUM>) and the fourth plug-in connection member (<NUM>) are away from each other, the third plug-in connection member (<NUM>) is connected with the first plug-in connection member (<NUM>) in a plug-in manner, and the fourth plug-in connection member (<NUM>) is connected with the second plug-in connection member (<NUM>) in a plug-in manner.