CN216596759U

CN216596759U - LED lamp strip screen

Info

Publication number: CN216596759U
Application number: CN202122752898.6U
Authority: CN
Inventors: 刘志强; 曾兰
Original assignee: Shenzhen Zhoumingchuang Intelligent Technology Co ltd
Current assignee: Shenzhen Haitai Equipment Co.,Ltd.
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-05-24
Anticipated expiration: 2031-11-10

Abstract

The utility model relates to an LED light bar screen. Wherein, LED lamp strip screen includes: the circuit board is provided with an output end and is electrically connected with the lamp strip through the output end, so that the circuit board can control the lighting state of the lamp strip; the fuse is a self-recovery fuse with a self-recovery function, and the fuse is connected to the circuit board and electrically connected with the output end so as to protect the circuit board from overload; the power supply is electrically connected to the circuit board to supply power to the circuit board. The LED lamp strip screen is provided with the power supply to supply electric energy to the lamp strip and the circuit board, the lighting state of the lamp strip is controlled by the circuit board, and the circuit board is provided with the fuse with the self-recovery function, so that the fuse does not need to be replaced after the circuit exceeds rated current, and the circuit still has the function of overload protection.

Description

LED lamp strip screen

Technical Field

The utility model relates to the technical field of lighting equipment, in particular to an LED light bar screen.

Background

The LED lamp strip screen is mainly used for brightening outdoor advertisement screens of buildings or stairs. However, in order to avoid fire or even fire caused by short circuit of the LED light bar screen, a safety device is often added in the circuit of the LED light bar screen to ensure timely power cut-off and prevent major safety accidents.

However, due to the safety design adopted by the LED light bar screen at present, after the safety device exceeds the rated current and carries out overload protection each time, the safety component can be broken and needs to be replaced again to continue working, so that a lot of troubles are brought to actual operation, and even certain potential safety hazards are caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model needs to provide an LED light bar screen, so that the LED light bar screen can have the function of overload protection without replacing safety components after the circuit exceeds the rated current.

An LED light bar screen comprising: the LED lamp comprises a lamp strip, a circuit board, a fuse and a power supply, wherein the circuit board is provided with an output end and is electrically connected with the lamp strip through the output end, so that the circuit board can control the lighting state of the lamp strip; the fuse has a self-recovery function, is connected to the circuit board and is electrically connected with the output end so as to protect the circuit board from overload; the power supply is electrically connected to the circuit board to supply power to the circuit board.

According to the LED lamp strip screen, the power supply is arranged to provide electric energy for the lamp strip and the circuit board, the lighting state of the lamp strip is controlled by the circuit board, and the fuse with the self-recovery function is arranged on the circuit board, so that the fuse does not need to be replaced after the circuit exceeds rated current, and the function of overload protection is still achieved for the circuit.

In one embodiment, the output ends are electrically connected with the light bars in a one-to-one correspondence manner; and/or the fuses are electrically connected with the output ends in a one-to-one correspondence manner.

In one embodiment, the LED light bar screen further comprises an electric cabinet, and the circuit board, the safety device and the power supply are installed in the electric cabinet.

In one embodiment, the electric cabinet comprises an upper cover and a box body, the upper cover is arranged on the box body, and the circuit board, the safety device and the power supply are all arranged in the box body.

In one embodiment, the box body or the upper cover is provided with a connecting hole for connecting the output end with the light bar, and the output end is arranged through the connecting hole and extends out of the electric cabinet.

In one embodiment, the LED light bar screen further includes a connecting wire, a connecting portion is disposed at one end of the light bar, and two ends of the connecting wire are electrically screwed with the output end and the connecting portion respectively, so as to electrically connect the light bar to the circuit board.

In one embodiment, the LED light bar screen further comprises a waterproof piece, and the waterproof piece is arranged between the upper cover and the box body.

In one embodiment, the light bar is located outside the electric cabinet and electrically connected to the circuit board.

In one embodiment, the fuse has a body and a pin, and the body is electrically connected to the output terminal through the pin.

In one embodiment, the pins are inserted into the circuit board and electrically connected with the output terminals.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an LED light bar screen in one embodiment;

FIG. 2 is an exploded view of the structure of FIG. 1 at circle A;

FIG. 3 is an exploded view of the structure of the electric cabinet, the power supply and the circuit board in one embodiment;

FIG. 4 is a diagram illustrating an exemplary circuit board assembly configuration;

fig. 5 is a schematic view of the overall structure of the fuse according to an embodiment.

Description of reference numerals:

10. an LED light bar screen; 100. a light bar; 110. a connecting portion; 200. a circuit board; 210. an output end; 300. A fuse; 310. a main body; 320. a pin; 400. a power source; 500. an electric cabinet; 510. an upper cover; 520. A box body; 530. a waterproof member; 540. connecting holes; 600. and connecting the wires.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In an embodiment, an LED light bar screen 1010, please refer to fig. 1, fig. 3 and fig. 4, includes: light bar 100, circuit board 200, fuse 300, and power supply 400. The circuit board 200 is provided with an output end 210 and electrically connected to the light bar 100 through the output end 210, so that the circuit board 200 can control the illumination state of the light bar 100. The fuse 300 is connected to the circuit board 200 and electrically connected to the output end 210 to protect the circuit board 200 from overload. The fuse 300 has a self-recovery function. The power supply 400 is electrically connected to the circuit board 200 to supply power to the circuit board 200.

In the LED strip screen 10, the power supply 400 is arranged to provide electric energy to the light strip 100 and the circuit board 200, the circuit board 200 is used to control the lighting state of the light strip 100, and the circuit board 200 is provided with the fuse having the self-recovery function, so that the fuse does not need to be replaced after the circuit exceeds the rated current, and the circuit still has the function of overload protection.

It should be noted that the overload protection is a function for preventing the power supply 400 from automatically cutting off the power supply due to an excessive load on the power supply 400 line.

It should also be noted that a self-healing fuse is understood to be composed of a specially treated polymeric resin (Polymer) and conductive particles (Carbon Black) distributed therein. Under normal operation, the polymer resin tightly binds the conductive particles outside the crystalline structure to form a chain-shaped conductive path, the self-recovery fuse is in a low-resistance state, and the heat energy generated by the current flowing through the self-recovery fuse on the circuit is small, so that the crystalline structure cannot be changed. When the short circuit or overload occurs to the circuit, the polymer resin is melted by the heat generated by the large current flowing through the self-recovery fuse, the volume of the self-recovery fuse is rapidly increased, a high resistance state is formed, the working current is rapidly reduced, and the limitation and protection of the circuit are realized. After the fault is eliminated, the self-recovery fuse cools down again to be clean, the volume shrinks, the conductive particles form the same conduction again, and the self-recovery fuse recovers to be in a low-resistance state, so that the circuit is protected. After the sequential protection of the circuit is completed, the self-recovery fuse can still be used without replacement.

The process of protecting the circuit by the self-recovery fuse is also a process of energy dynamic balance:

the current flowing through the self-recovery fuse generates a certain degree of heat (the self-recovery fuse has resistance) due to the thermal effect of the current, the generated heat is partially dissipated into the environment, and the heat which is not dissipated into the environment can increase the temperature of the self-recovery fuse.

During normal operation of the power supply 400 circuit, the temperature of the self-healing fuse element is low and the heat generated and dissipated is balanced. The self-healing fuse element is now in a low resistance state and the self-healing fuse element does not operate (i.e., the volume of the self-healing fuse does not change). When the current flowing through the self-healing fuse element continues to increase or the ambient temperature of the self-healing fuse element continues to rise until the preset threshold of the self-healing fuse element is broken through (in the actual operation process, the power supply 400 circuit with different currents may correspondingly select the self-healing fuse with the proper threshold), the heat generated by the self-healing fuse element is greater than the heat emitted. At which point the temperature of the self-healing fuse element will suddenly rise.

In the process of temperature rise of the self-recovery fuse element, a small temperature change can cause a great increase of the resistance value of the self-recovery fuse element, so that the self-recovery fuse element is in a high-resistance protection state. The increase in the resistance of the self-healing fuse element limits the current so that the current flowing through the power supply 400 circuit drops abruptly in a short time, thereby protecting the power supply 400 circuit from damage. The self-recovery fuse element in the changed state is always in the operating state (high resistance state) as long as the voltage applied to the circuit of the power supply 400 generates heat greater than or equal to the heat emitted from the self-recovery fuse element.

The self-healing fuse element automatically heals when the applied voltage is removed.

In one embodiment, referring to fig. 1 and fig. 4, the output ends 210 are electrically connected to the light bars 100 in a one-to-one correspondence manner. Therefore, circuit board 200 is connected to light bar 100 through output end 210, so as to control the illumination state of light bar 100.

It should be noted that the number of light bars 100 can be one, two or more. The number of output ends 210 may be equal to the number of light bars 100, or may be more than the number of light bars 100. When the number of the output ends 210 is equal to that of the light bars 100, the output ends 210 are electrically connected with the light bars 100 in a one-to-one correspondence manner; when the number of the output ends 210 is greater than the number of the light bars 100, all the light bars 100 are electrically connected to a part of the output ends 210 in a one-to-one correspondence manner, and the extra output ends 210 are used as spare interfaces, so that when a part of the output ends 210 are failed, the light bars 100 can still be electrically connected to the circuit board 200 after the output ends 210 connected with the light bars are replaced.

Further, referring to fig. 1 and 4, the fuses 300 are electrically connected to the output ends 210 in a one-to-one correspondence manner.

Therefore, each output end 210 is electrically connected to a fuse 300, so that each output end 210 and the light bar 100 connected to the output end 210 can obtain independent overload protection. Therefore, when the circuit of any one light bar 100 is overloaded, the circuit of the rest light bars 100 is not affected, which is beneficial to improving the stability of the LED light bar screen 10.

In one embodiment, referring to fig. 3, LED light bar screen 1010 further comprises an electric cabinet 500. The circuit board 200, the fuse 300, and the power supply 400 are installed in the electric cabinet 500.

Therefore, the electric cabinet 500 can protect the circuit board 200, the fuse 300 and the power supply 400, so that the influence of a large amount of dust and sewage on the circuit board 200, the fuse 300 and the power supply 400 is avoided, the service life of the LED light bar screen 10 is prolonged, and the failure rate of the LED light bar screen 10 is reduced.

In one embodiment, referring to fig. 3, the electric cabinet 500 includes an upper cover 510 and a box 520. The upper cover 510 covers the case 520. The circuit board 200, the fuse 300 and the power supply 400 are all installed in the case 520. The upper cover 510 is detachably coupled to the case 520.

Therefore, the upper cover 510 is detachable from the box 520, so that the electric cabinet 500 can be detached when the circuit board 200, the safety device 300 or the power supply 400 in the electric cabinet 500 have a fault, and the faulty component can be replaced and maintained independently, which is beneficial to reducing the maintenance cost of the LED light bar screen 10.

It can be understood that the shapes of the upper cover 510 and the box 520 can be any shape such as a cuboid, a sphere, a cylinder, etc., and it is only necessary to ensure that the upper cover 510 and the box 520 are stably combined and are conveniently opened.

Specifically, in the present embodiment, the upper cover 510 and the box 520 are both rectangular parallelepipeds.

In one embodiment, referring to fig. 3, the box 520 or the top cover 510 has a connection hole 540 electrically connected to the output end 210. The output end 210 is inserted into the connection hole 540 and extends out of the electric cabinet 500. Thus, the connecting holes 540 are formed in the box 520 or the upper cover 510, so that the output end 210 can extend out of the electric cabinet 500, and the output end 210 can be electrically connected with the light bar 100 conveniently.

Further, referring to fig. 3, output end 210 is screwed to light bar 100, such as: the output end 210 is provided with external threads. So that light bar 100 can be electrically screwed to output end 210.

It should be noted that the electrically threaded connection means that the light bar 100 is threaded with the output end 210 and can be electrically connected to the output end 210. The lamp strip 100 can be conveniently replaced in a threaded manner, and the complexity in replacing the lamp strip 100 is reduced.

Furthermore, the light bar 100 is located outside the electric cabinet 500 and electrically connected to the circuit board 200. Thus, the light bar 100 is disposed outside the electric cabinet 500, and electrically connected to the circuit board 200 through the external thread on the output end 210.

Specifically, in the present embodiment, the connection hole 540 is opened in the case 520.

In one embodiment, referring to fig. 1 and fig. 2, the LED light bar screen 10 further includes a connection line 600. One end of light bar 100 is provided with connecting portion 110. Two ends of the connection wire 600 are electrically screwed with the output end 210 and the connection portion 110, respectively, so as to electrically connect the light bar 100 to the circuit board 200. That is, at least one connection line 600 is used between the light bar 100 and the circuit board 200 to realize the connection. In addition, when the light bar 100 or the electric cabinet 500 needs to be replaced, the connecting wire 600 is only required to be disconnected from the connecting part 110 or the output end 210, and the operation is convenient and safe.

In one embodiment, referring to fig. 3, the LED light bar screen 10 further comprises a waterproof member 530. A waterproof member 530 is provided at the junction of the upper cover 510 and the case 520. Therefore, the waterproof part 530 is arranged at the joint of the upper cover 510 and the box body 520, so that the waterproof performance of the electric cabinet 500 can be further improved, and the electrical safety of the LED light bar screen 10 can be effectively ensured.

In one embodiment, referring to fig. 3, the waterproof member 530 is pressed by the upper cover 510 to seal the upper cover 510 to the box 520. Wherein, the waterproof member 530 may be, but not limited to, a rubber ring, etc. Since the waterproof property 530 is pressed by the upper cover 510, the waterproof property of the electric cabinet 500 can be further improved in the protection.

In one embodiment, referring to fig. 4 and 5, the fuse 300 has a body 310 and pins 320. The pins 320 are electrically connected to the body 310. The main body 310 is electrically connected to the output terminal 210 through the pins 320, and thus, the fuse 300 is designed as two parts of the main body 310 and the pins 320, so that the electrical connection part is partially completed by the pins 320, thereby facilitating the connection between the fuse 300 and the output terminal 210.

Further, the pins 320 are inserted into the circuit board 200 and electrically connected to the output end 210, so that the electrical connection is achieved in an inserting manner, the connection operation is simplified, and the assembly efficiency is improved.

According to the above-mentioned working principle of the self-restoring fuse, when the current flowing through the fuse 300 is increased to cause the temperature of the fuse 300 to suddenly rise, the volume of the body 310 is rapidly expanded. The main body 310 electrically connected to the output end 210 only through the pins 320 does not affect the connection relationship with the output end 210 due to the volume change thereof.

It will be appreciated that in order to better enable the respective fuse 300 to operate without interfering with each other, sufficient space should be left between the respective fuses 300 so that the volume of the fuses 300 does not interfere with other elements at all times during the change.

It is also understood that the shape of the body 310 is not limited thereto, nor is the number of pins 320.

Specifically, in the present embodiment, the main body 310 is a circular ring, and the number of the pins 320 is two.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," "mated" and the like are to be construed broadly and can, for example, be fixedly connected, releasably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" 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," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An LED light bar screen, comprising:

a light bar;

the circuit board is provided with an output end and is electrically connected with the lamp strip through the output end, so that the circuit board can control the lighting state of the lamp strip;

the fuse has a self-recovery function, is connected to the circuit board and is electrically connected with the output end so as to protect the circuit board from overload; and a (C) and (D) and,

and the power supply is electrically connected to the circuit board so as to supply power to the circuit board.

2. The LED light bar screen of claim 1, wherein the output terminals are electrically connected to the light bars in a one-to-one correspondence; and/or the presence of a gas in the gas,

the fuse protector is electrically connected with the output ends in a one-to-one correspondence manner.

3. The LED light bar screen of claim 1, further comprising an electrical cabinet, wherein the circuit board, the fuse, and the power supply are all disposed within the electrical cabinet.

4. The LED light bar screen of claim 3, wherein the electrical cabinet comprises an upper cover and a box body, the upper cover is covered on the box body, and the circuit board, the safety device and the power supply are all arranged in the box body.

5. The LED light bar screen as claimed in claim 4, wherein the box body or the upper cover is provided with a connecting hole for connecting the output end with the light bar, and the output end is arranged through the connecting hole and extends out of the electric cabinet.

6. The LED light bar screen of claim 5, further comprising a connecting wire, wherein a connecting portion is disposed at one end of the light bar, and two ends of the connecting wire are electrically screwed with the output end and the connecting portion, respectively, so as to electrically connect the light bar to the circuit board.

7. The LED light bar screen of claim 4, further comprising a waterproof member disposed between the cover and the box.

8. The LED light bar screen of claim 3, wherein the light bar is located outside the electrical cabinet and is electrically connected to the circuit board.

9. The LED light bar screen of any one of claims 1-8, wherein the cutout is provided with a body and a pin, the pin being electrically connected to the body, the body being electrically connected to the output terminal through the pin.

10. The LED light bar screen of claim 9, wherein the pins are inserted into the circuit board and electrically connected to the output terminals.