CN219893503U

CN219893503U - Display main board free of tin planting

Info

Publication number: CN219893503U
Application number: CN202320865131.0U
Authority: CN
Inventors: 吴亚龙; 陶能忠; 周坦; 陈玉春
Original assignee: Shenzhen Yixun Electronics Co ltd
Current assignee: Shenzhen Yixun Electronics Co ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-10-24
Anticipated expiration: 2033-04-11

Abstract

The utility model provides a tin-planting-free display main board which comprises a display main board body, wherein a lamp effect board structure is arranged on the periphery of the top of the display main board body, the lamp effect board structure comprises two supporting seats arranged on the display main board body, a circuit board is connected between the tops of the two supporting seats through bolts, a plurality of groups of welding spots are arranged on the circuit board, each group of welding spots consists of a plurality of contacts, a plurality of LEDs are arranged on the circuit board, and a connecting mechanism is arranged between each LED and the circuit board. According to the LED connecting device, the connecting mechanism is arranged, the connecting part and the limiting protection part in the connecting mechanism are matched with each other, so that the LED can be fixed on the circuit board, namely, the connection between the LED and the circuit board is realized, soldering tin is not needed in the connecting process, the problem that the circuit board or the LED is damaged due to high temperature in the soldering tin connection process can be solved, and the connecting part and the limiting protection part are detachable, so that the LED can be replaced conveniently.

Description

Display main board free of tin planting

Technical Field

The utility model relates to the technical field of lamp effect boards, in particular to a display main board free of tin planting.

Background

The display is a display tool for displaying a certain electronic file on a screen through specific transmission equipment, the display main board is an important part on the display, and the effect of a horse race lamp can be realized on the back of the display by arranging a circle of LED lamp effect boards on the display main board, in particular to a shell matched with transparent acrylic;

chinese utility model patent: CN201120259637.4 discloses a circuit board of an LED lamp, comprising an LED, a heat dissipation pad, soldering tin, a circuit board and a substrate, wherein the circuit board is attached to the substrate; a pit is formed in the circuit board and penetrates the circuit board up and down, soldering tin is filled in the pit, the upper surface of the soldering tin is exposed out of the pit, and a heat dissipation pad at the bottom of the LED is welded on the pit through the soldering tin; the soldering tin is also welded with copper foil on the circuit board; at the same time, the solder is also soldered or bonded to the underlying substrate. The heat dissipation pad, the copper foil and the substrate are electrically connected and simultaneously connected in a heat conduction manner through soldering tin. When power is supplied, heat of the LEDs can be conducted to the substrate to be dissipated through the radiating pad and the soldering tin, so that the purposes of radiating and lighting are achieved.

The connection between the LED and the circuit board is realized through soldering tin, and the circuit board or the LED can be damaged due to high temperature during welding, and the LED is not convenient to replace when damaged after welding.

Therefore, we have made improvements to this, and put forward a display motherboard free of tin plating.

Disclosure of Invention

The utility model aims at: the problem that the circuit board or the LED is possibly damaged due to the high temperature during welding through soldering tin connection existing at present, and replacement is not facilitated when the LED is damaged after welding is solved.

In order to achieve the above object, the present utility model provides the following technical solutions:

the display main board without tin implantation is used for improving the problems.

The utility model is specifically as follows:

the LED display panel comprises a display main board body, wherein the periphery of the top of the display main board body is provided with a lamp effect board structure, the lamp effect board structure comprises two supporting seats arranged on the display main board body, a circuit board is connected between the tops of the two supporting seats through bolts, a plurality of groups of welding spots are arranged on the circuit board, each group of welding spots is composed of a plurality of contacts, a plurality of LEDs are arranged on the circuit board, and a connecting mechanism is arranged between each LED and the circuit board;

the connecting mechanism comprises a connecting part arranged between the circuit board and the LED, and a limiting protection part is arranged on the connecting part.

As an optimized implementation mode of the display main board without tin plating, the positions of a plurality of LEDs respectively correspond to the positions of a plurality of groups of welding spots, and pins of the LEDs are contacted with contacts.

As a preferred implementation mode of the display main board without tin plating provided by the utility model, the connecting part comprises a clamping seat arranged on the circuit board, clamping blocks are arranged on two sides of the top of the clamping seat, one sides of the two clamping blocks, which are close to each other, are obliquely arranged, and a space is reserved between the limiting protective cover and the clamping blocks, and is used for snapping the clamping blocks when the limiting protective cover is detached.

As a preferred implementation mode of the display main board free of tin planting, a clamping plate is arranged between the two clamping blocks, the clamping plate is positioned above the circuit board, and the clamping plate and the clamping seat are clamped on the circuit board, so that the connection firmness between the connecting mechanism and the circuit board can be improved.

As an optimal implementation mode of the display main board free of tin planting, the clamping board is provided with a void-avoiding groove, and the LEDs are located in the void-avoiding groove.

As a preferred implementation mode of the display main board without tin plating provided by the utility model, grooves are formed at the tops of two sides of the clamping board.

As a preferred implementation mode of the display main board without tin plating provided by the utility model, two positioning blocks are fixedly arranged at the bottoms of the two clamping blocks, and the positioning blocks are spliced with the grooves.

As a preferred implementation mode of the display main board without tin plating provided by the utility model, the display main board without tin plating further comprises two clamping strips and two clamping grooves, wherein the two clamping strips are respectively and fixedly arranged on the inner walls of the two sides of the clamping seat, the two clamping grooves are respectively arranged on the two sides of the circuit board, and the clamping grooves are spliced with the clamping strips.

As a preferred implementation mode of the display main board without tin plating provided by the utility model, the protection part comprises a limit protection cover, the limit protection cover is placed at the top of the clamping board, and the top of the inner cavity of the limit protection cover is contacted with the top of the LED.

As a preferred implementation mode of the display main board free of tin planting, limiting blocks are fixedly arranged on two sides of the bottom of the limiting protective cover, the two limiting blocks are respectively located in the two grooves, and each limiting block is located between the two positioning blocks.

Compared with the prior art, the utility model has the beneficial effects that:

in the scheme of the utility model:

through the coupling mechanism who sets up, coupling portion and spacing guard portion in the coupling mechanism mutually support can fix LED on the circuit board, realize the connection of LED and circuit board promptly, need not soldering tin in the connection process to can solve the high temperature when connecting through soldering tin and lead to the condition that circuit board or LED damaged, and can dismantle between coupling portion and the spacing guard portion, thereby be convenient for change LED.

Drawings

Fig. 1 is a schematic diagram of a display motherboard without tin plating according to the present utility model

FIG. 2 is a schematic diagram of a portion of a motherboard of a display without tin plating according to the present utility model;

fig. 3 is a schematic structural diagram of an LED of a display motherboard without tin plating according to the present utility model;

fig. 4 is a schematic structural diagram of a contact of a display motherboard without tin plating according to the present utility model;

fig. 5 is a schematic structural diagram of a connection mechanism of a display motherboard without tin plating according to the present utility model;

fig. 6 is a schematic structural diagram of a void-avoiding groove of a display motherboard without tin plating according to the present utility model;

FIG. 7 is a schematic diagram of a recess of a motherboard of a display without tin plating according to the present utility model;

FIG. 8 is a schematic diagram of a card holder of a motherboard of a display without tin plating according to the present utility model;

fig. 9 is a schematic bottom view of a limit shield of a display motherboard without tin plating according to the present utility model.

The figures indicate:

1. a circuit board; 2. a contact; 3. a connecting mechanism; 301. a clamping seat; 302. a clamping block; 303. a clamping plate; 304. an empty-avoiding groove; 305. a groove; 306. a positioning block; 307. limiting protective cover; 308. a limiting block; 309. clamping strips; 310. a clamping groove; 4. an LED; 5. a display main board body; 6. and a supporting seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model.

Thus, the following detailed description of the embodiments of the utility model is not intended to limit the scope of the utility model, as claimed, but is merely representative of some embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, under the condition of no conflict, the embodiments of the present utility model and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, the terms "upper", "lower", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship conventionally put in use of the inventive product, or an azimuth or a positional relationship conventionally understood by those skilled in the art, such terms are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

As described in the background art, the high temperature during soldering may cause damage to the circuit board or LED by soldering, and the LED is damaged after soldering, which is disadvantageous for replacement.

In order to solve the technical problem, the utility model provides a display main board free of tin planting.

Specifically, referring to fig. 1-9, the display motherboard without tin plating specifically includes: the LED display comprises a display main board body 5, wherein the periphery of the top of the display main board body 5 is provided with a lamp effect board structure, the lamp effect board structure comprises two supporting seats 6 which are arranged on the display main board body 5, a circuit board 1 is connected between the tops of the two supporting seats 6 through bolts, a plurality of groups of welding spots are arranged on the circuit board 1, each group of welding spots consists of a plurality of contacts 2, a plurality of LEDs 4 are arranged on the circuit board 1, and a connecting mechanism 3 is arranged between each LED4 and the circuit board 1;

the display main board body 5 is a wireless projection display main board.

The connecting mechanism 3 comprises a connecting part arranged between the circuit board 1 and the LED4, and a limiting protection part is arranged on the connecting part.

According to the display main board free of tin planting, the connecting mechanism 3 is arranged, the connecting part and the limiting protection part in the connecting mechanism 3 are matched with each other, so that the LED4 can be fixed on the circuit board 1, namely, the connection between the LED4 and the circuit board 1 is realized, soldering tin is not needed in the connection process, the problem that the circuit board 1 or the LED4 is damaged due to high temperature in the connection process of soldering tin can be solved, and the connecting part and the limiting protection part are detachable, so that the LED4 is convenient to replace.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Example 1

Referring to fig. 1-9, a display motherboard without tin plating comprises a display motherboard body 5, wherein a light effect board structure is arranged around the top of the display motherboard body 5, the light effect board structure comprises two supporting seats 6 arranged on the display motherboard body 5, a circuit board 1 is connected between the tops of the two supporting seats 6 through bolts, a plurality of groups of welding spots are arranged on the circuit board 1, each group of welding spots is composed of a plurality of contacts 2, a plurality of LEDs 4 are arranged on the circuit board 1, and a connecting mechanism 3 is arranged between each LED4 and the circuit board 1;

In general, the harm of solder to human body is mainly lead poisoning, which is caused by lead poisoning, and damage to multiple systems such as digestion, nerve, respiration and blood of human body, the solder can be divided into lead solder and leadless solder, the harm to human body is mainly lead element in lead solder, lead in environment enters human body through food, respiration and skin, and lead poisoning is caused by acute or chronic toxic effect on digestion, nerve, respiration, blood and urinary system, and is mainly caused by metabolism disorder of lead to cause anemia, inhibit proliferation and differentiation of neuron, damage gastric mucosa regeneration capability, and influence on renal tubular epithelial cell mitochondrial function.

Common defects of solder joints include:

the rosin residue can be caused by the fact that the soldering iron has insufficient power and short soldering time and leads or terminals are not clean, so that poor electrical contact is caused;

before the soldering tin is solidified, other things are used for contacting the welding point to heat and excessively repeat the welding for too many times, so that the surface is rough, the mechanical strength of the welding point is reduced due to no luster, and the service life of a product is reduced;

before the soldering tin is solidified, other things are used for contacting the soldering point, heating is excessive or insufficient, the lead or the terminal is not clean, so that a soldering point is loosened, the soldering point is provided with a gap, and the soldering point moves along with the pulling wire;

the solder is excessively heated for too long, flows out of the welding spot, wraps the welding spot into a sphere, has a wetting angle of more than 90 degrees, influences the appearance of the welding spot, and can have hidden quality hazards, such as the possibility of a cavity in the welding spot;

improper heating time of the iron evacuation method is too long, so that the surface of the welding spot is protruded like a ox horn, and a circuit short circuit phenomenon is easy to occur;

the lead wire or the terminal is not clean, the pre-hung soldering tin is insufficient, the soldering time is too short, the amount of the soldering tin is too small, the wetting angle is less than 15 degrees, and the mechanical strength of a welding spot is reduced;

dust or scraps accumulate to cause poor insulation, the part is heated for too long, the lead is bound poorly, the welding spots are rough, the lead is burnt, the lead is trapped, and the core wires are exposed excessively;

the welding metal is overheated, so that the insulating part is burnt, and the hidden danger of short circuit is easily caused.

The display mainboard of exempting from to plant tin that this embodiment provided can fix LED4 on circuit board 1 through the coupling mechanism 3 that sets up, coupling mechanism 3 in coupling mechanism's connecting portion and spacing guard portion mutually support, realizes the connection of LED4 and circuit board 1 promptly, need not soldering tin in the connection process to can solve the high temperature when connecting through soldering tin and lead to the condition that circuit board 1 or LED4 damaged, and can dismantle between coupling portion and the spacing guard portion, thereby be convenient for change LED 4.

Example 2

The display main board without tin plating provided in embodiment 1 is further optimized, specifically, as shown in fig. 3 and fig. 4, the positions of the plurality of LEDs 4 respectively correspond to the positions of the plurality of groups of solder joints, and the pins of the LEDs 4 are contacted with the contacts 2, so that connection between the LEDs 4 and the circuit board 1 can be realized.

The connecting portion comprises a clamping seat 301 arranged on the circuit board 1, clamping blocks 302 are arranged on two sides of the top of the clamping seat 301, one sides, close to each other, of the two clamping blocks 302 are obliquely arranged, and therefore a space is reserved between the limiting protective cover 307 and the clamping blocks 302, and the clamping blocks 302 are broken when the limiting protective cover 307 is detached.

A clamping plate 303 is placed between the two clamping blocks 302, the clamping plate 303 is located above the circuit board 1, the clamping plate 303 and the clamping seat 301 are clamped on the circuit board 1, and the connection firmness between the connecting mechanism 3 and the circuit board 1 can be improved.

The clamping plate 303 is provided with the clearance groove 304, the LED4 is positioned in the clearance groove 304, and the LED4 can be limited through the clearance groove 304, so that the LED4 is prevented from moving horizontally.

Grooves 305 are formed in the tops of the two sides of the clamping plate 303.

Two positioning blocks 306 are fixedly arranged at the bottoms of the two clamping blocks 302, the positioning blocks 306 are inserted into the grooves 305, the positioning blocks 306 and the grooves 305 are matched with each other to limit the clamping plates 303 and the clamping bases 301, and the clamping bases 301 and the clamping plates 303 are prevented from being misplaced.

The LED lamp further comprises two clamping strips 309 and two clamping grooves 310, wherein the two clamping strips 309 are respectively and fixedly arranged on the inner walls of the two sides of the clamping seat 301, the two clamping grooves 310 are respectively formed in the two sides of the circuit board 1, the clamping grooves 310 are spliced with the clamping strips 309, the clamping seat 301 and the circuit board 1 can be limited through the mutual matching of the clamping strips 309 and the clamping grooves 310, and the LED lamp 4 and the contact 2 are prevented from being staggered due to the relative movement between the clamping seat 301 and the circuit board 1.

Through above-mentioned structural design, can improve the stability of being connected between coupling mechanism 3 and the circuit board 1, can also carry out spacingly to LED4, guarantee the connection between LED4 and the contact 2.

Example 3

For further optimization of the display motherboard without tin plating provided in embodiment 1 or 2, as shown in fig. 2, 5 and 9, the protection part comprises a limit protection cover 307, the limit protection cover 307 is placed at the top of the clamping plate 303, the top of the inner cavity of the limit protection cover 307 is contacted with the top of the LED4, the top of the LED4 can be limited by the limit protection cover 307, so that the LED4 is prevented from moving, and the whole limit protection cover 307 is made of transparent acrylic.

The acrylic has good light transmittance, is a colorless transparent organic glass plate, has light transmittance of more than 92%, excellent weather resistance and strong adaptability to natural environment, can not change the performance even if the acrylic is irradiated by sunlight and sprayed by wind and rain for a long time, and has good ageing resistance; the paint has good processing performance, is suitable for mechanical processing and is easy to be thermoformed, the acrylic plate can be dyed, the surface can be painted, silk-screened or vacuum coated, the paint is nontoxic, even if the paint contacts with people for a long time, the gas generated during combustion does not generate toxic gas, and the paint has excellent weather resistance, acid resistance and alkali resistance.

Both sides of limit guard 307 bottom are all fixed mounting have stopper 308, and two stoppers 308 are located two recess 305 respectively, and every stopper 308 is located between two locating pieces 306, sets up like this and makes fixture block 302 also can carry out spacingly to stopper 308, and then can carry out spacingly to limit guard 307.

Specifically, the display motherboard of this exempts from to plant tin during operation/during the use: the clamping seat 301 is broken off from two sides of the limiting protective cover 307, so that the two clamping blocks 302 are far away from each other, namely the clamping blocks 302 are separated from the clamping plates 303, the positioning blocks 306 are separated from the grooves 305, the clamping seat 301 is taken down, the limiting protective cover 307 can be taken down by pulling the limiting protective cover 307, and the LED4 can be detached for replacement by pulling the LED4 upwards;

during installation, the LEDs 4 are arranged on the circuit board 1, pins of the LEDs 4 are in contact with the contacts 2, then the limiting protective cover 307 is arranged on the top of the clamping plate 303, the limiting block 308 is inserted into the groove 305, the clamping seat 301 is arranged on the outer surface of the circuit board 1, the empty avoiding grooves 304 on the clamping plate 303 are aligned with the LEDs 4, then the clamping plate 303 is arranged between the two clamping blocks 302, the limiting protective cover 307 is pushed downwards, the clamping plate 303 is pushed to descend through the limiting protective cover 307, and the clamping plate 303 is clamped between the bottoms of the two clamping blocks 302, so that connection can be completed.

The above embodiments are only for illustrating the present utility model and not for limiting the technical solutions described in the present utility model, and although the present utility model has been described in detail in the present specification with reference to the above embodiments, the present utility model is not limited to the above specific embodiments, and thus any modifications or equivalent substitutions are made to the present utility model; all technical solutions and modifications thereof that do not depart from the spirit and scope of the utility model are intended to be included in the scope of the appended claims.

Claims

1. The utility model provides a exempt from to plant display mainboard of tin, includes display mainboard body (5), all is provided with lamp effect plate structure around display mainboard body (5) top, lamp effect plate structure includes two supporting seat (6) of installing on display mainboard body (5), two have circuit board (1) through bolted connection between the top of supporting seat (6), be provided with multiunit solder joint on circuit board (1), every welding spot of group all has a plurality of contact (2) to constitute, a serial communication port, place a plurality of LEDs (4) on circuit board (1), every all be provided with coupling mechanism (3) between LED (4) and circuit board (1);

the connecting mechanism (3) comprises a connecting part arranged between the circuit board (1) and the LED (4), and a limiting protection part is arranged on the connecting part.

2. A tin-free display motherboard according to claim 1, wherein the positions of a plurality of LEDs (4) correspond to the positions of a plurality of groups of solder joints, respectively, and the pins of the LEDs (4) are in contact with the contacts (2).

3. The display motherboard of claim 2, wherein the connection portion includes a clamping seat (301) disposed on the circuit board (1), and clamping blocks (302) are disposed on two sides of the top of the clamping seat (301).

4. A tin-free display motherboard according to claim 3, characterized in that a clamping plate (303) is placed between two clamping blocks (302), said clamping plate (303) being located above the circuit board (1).

5. The display motherboard of claim 4, wherein the clamping plate (303) is provided with a void-avoiding groove (304), and the LED (4) is located in the void-avoiding groove (304).

6. The tin-free display motherboard of claim 5, wherein the top of both sides of the clamping plate (303) is provided with grooves (305).

7. The display motherboard of claim 6, wherein two positioning blocks (306) are fixedly mounted at the bottoms of the two clamping blocks (302), and the positioning blocks (306) are inserted into the grooves (305).

8. The display motherboard of claim 7, further comprising two clamping strips (309) and two clamping grooves (310), wherein the two clamping strips (309) are respectively and fixedly installed on the inner walls of the two sides of the clamping seat (301), the two clamping grooves (310) are respectively opened on the two sides of the circuit board (1), and the clamping grooves (310) are spliced with the clamping strips (309).

9. The tin-free display motherboard of claim 8, wherein the protective portion comprises a limit shield (307), the limit shield (307) is placed on top of the card board (303), and the top of the cavity of the limit shield (307) is in contact with the top of the LED (4).

10. The display motherboard of claim 9, wherein limiting blocks (308) are fixedly mounted on two sides of the bottom of the limiting shield (307), two limiting blocks (308) are respectively located in two grooves (305), and each limiting block (308) is located between two positioning blocks (306).