CN219981137U - Lampshade type circuit board and LED lamp strip - Google Patents

Abstract

The utility model discloses a lampshade type circuit board and an LED lamp strip, which are provided with a front surface, and comprise a metal circuit layer, wherein a solder mask layer is arranged on the metal circuit layer, a plurality of pad windows are arranged on the solder mask layer, and the metal circuit layer is not covered by the solder mask layer at the positions of the pad windows; the front of the circuit board is provided with a first surface and a second surface, the second surface is positioned on one side of the first surface in the width direction of the circuit board, the bonding pad window is partially or completely arranged on the first surface, an included angle a is formed between the second surface and the first surface, the included angle a is more than or equal to 90 degrees and less than 180 degrees, or the front of the circuit board is an arc-shaped concave surface, the arc-shaped concave surface comprises a concave side surface and a concave bottom surface, and the bonding pad window is partially or completely arranged on the concave bottom surface of the arc-shaped concave surface, so that the circuit board is in a lampshade structure. The LED light source has the characteristics of high light emitting efficiency, low cost and the like.

Description

Lampshade type circuit board and LED lamp strip

Technical Field

The utility model relates to the field of LED lamp strips, in particular to a lampshade type circuit board and an LED lamp strip.

Background

The prior art LED light strips fall into two categories: the LED lamp strip is a non-waterproof bare lamp strip, which consists of a flexible circuit board, an LED and other electronic elements, wherein double-sided adhesive tapes are adhered to the back surfaces of many lamp strips, and the bare lamp strip is powered by constant voltage with voltage of 36V or below; the other type is a waterproof lamp strip, which consists of a flexible circuit board, an LED and other electronic elements, wherein the flexible circuit board is coated with a light-transmitting resin material, and the light-transmitting resin material plays a role in preventing water and dust. For the second type of light strip, the front of the existing flexible circuit board is a plane, and the LEDs are arranged on the plane, because the light rays of the LEDs are not all emitted forward when the LEDs emit light, a part of the light rays are emitted parallel to the front, the part of the light rays cannot play a role in illumination, the part of the light rays are virtually lost, and the light rays emitted forward are effective light rays for the use place of the LED light strip, so that the light utilization rate of the existing waterproof light strip is lower.

For mature products such as LED lamp strips, the manufacturing cost is extremely important for obtaining competitiveness of the products, the existing LED lamp strips have a cost contradiction, positive and negative electrode main lines from beginning to end are arranged on a circuit board and are used for supplying power to the whole long lamp strip, the lamp strips can be made longer as enough current loads are needed for the main lines (the cross section area of the main lines is enough), if the main line loads are smaller, the tail voltage is too small due to pressure drop, so that the tail brightness is too low), if a double-layer circuit is used for the circuit board, the back surface of the circuit board has only two lines, namely a positive electrode main line and a negative electrode main line, the positive electrode main line and the negative electrode main line can be arranged to be wider, and the current load requirements are met, but the cost of the double-layer circuit board is quite high compared with that of a single-layer circuit board; if a single-layer circuit board is used as the circuit board, although the single-layer circuit board is cheaper, if the single-layer circuit board with the same width is used, the positive and negative electrode main lines (the middle area needs to be used for welding LEDs and the like) can only be arranged in a narrow space on two sides of the circuit board, so that the main line width is insufficient, at the moment, the circuit board can only be designed to be wider, the glue for encapsulation is more, and the cost is higher, therefore, the existing waterproof LED lamp strip is difficult to further reduce the cost.

For this reason, improvements and optimizations are necessary to existing LED light strips.

Disclosure of Invention

The present utility model aims to solve at least one of the problems of the prior art. Therefore, the lampshade type circuit board and the LED lamp strip are high in light emitting efficiency and low in cost.

The technical scheme adopted for solving the technical problems is as follows:

in a first aspect, an embodiment of the present utility model provides a lampshade circuit board, which has a front surface, and includes a metal circuit layer, wherein a solder mask layer is provided on the metal circuit layer, a plurality of solder pad windows are provided on the solder mask layer, and the metal circuit layer is uncovered by the solder mask layer at the positions of the solder pad windows; the front of the circuit board is provided with a first surface and a second surface, the second surface is positioned on one side of the first surface in the width direction of the circuit board, the bonding pad window is partially or completely arranged on the first surface, an included angle a is formed between the second surface and the first surface, the included angle a is more than or equal to 90 degrees and less than 180 degrees, or the front of the circuit board is an arc-shaped concave surface, the arc-shaped concave surface comprises a concave side surface and a concave bottom surface, and the bonding pad window is partially or completely arranged on the concave bottom surface of the arc-shaped concave surface, so that the circuit board is in a lampshade structure.

Optionally, the circuit board further comprises a third surface, wherein the third surface is positioned on the other side of the first surface in the width direction of the circuit board, so that the second surface and the third surface are respectively positioned on two sides of the first surface, and an included angle b is formed between the third surface and the first surface, and the included angle b is more than or equal to 90 degrees and less than 180 degrees.

Optionally, the second surface and the third surface are symmetrically disposed.

Optionally, the first surface, the second surface and the third surface are integrally formed, and the second surface and the third surface are formed by bending relative to the first surface.

Optionally, a plurality of bending gaps are formed at the bending positions.

Optionally, the second surface, the third surface and the concave side are silver or white.

Optionally, the first surface, the second surface and the third surface divide the circuit board into three areas, wherein the circuit board in the middle area is a single-layer circuit, and the circuit boards on two sides are double-layer circuits; alternatively, the three regions are all single-layer lines, or all double-layer lines.

Optionally, a scissor position capable of being used in a shearing way is arranged on the circuit board, at least 2 connecting pads are arranged on the scissor position, and the connecting pads are arranged in the middle area or/and one side area or two side areas; alternatively, the connection pads are arranged on the concave bottom surface or/and the concave side surface.

In a second aspect, an embodiment of the present utility model provides an LED light strip, including the circuit board according to any one of the embodiments of the first aspect, where an electronic component is disposed on the circuit board, and the electronic component includes an LED, and further includes a rubber sleeve, where the rubber sleeve covers the circuit board and the electronic component thereon.

Optionally, the LED is disposed on the first surface or on the concave bottom surface.

Optionally, the distance between the light emitting surface of the LED and the inner surface of the rubber sleeve is c, c is greater than 0, and a part of the light emitted by the LED directly penetrates through the rubber sleeve and emits outwards, a part of the light is reflected by the rubber sleeve and is folded back to the first surface or the concave side surface, the light penetrates through the rubber sleeve after being reflected and emits outwards, and a part of the light directly irradiates the first surface or the concave side surface and penetrates through the rubber sleeve after being reflected and emits outwards.

The embodiment of the utility model has at least one of the following beneficial effects: the front surface of the circuit board is divided into at least a first surface and a second surface, the pad window is partially or completely arranged on the first surface, the second surface and the first surface form an included angle a, an angle a is more than or equal to 90 degrees and less than 180 degrees, or the front surface of the circuit board is provided with an arc concave surface, the arc concave surface comprises a concave side surface and a concave bottom surface, and the pad window is partially or completely arranged at the concave bottom surface of the arc concave surface, so that the circuit board is in a lampshade structure, when the circuit board is applied to a waterproof lamp strip, a part of light rays emitted by LEDs arranged on the first surface or the concave bottom surface directly penetrate through the rubber sleeve and are outwards emitted, a part of light rays are reflected by the rubber sleeve and are returned to the first surface or the concave bottom surface, the rubber sleeve is penetrated outwards after being reflected, and the light rays emitted forwards are directly penetrated through the rubber sleeve, so that the brightness of the circuit board can be improved by about 15% -20%; in addition, as the second surface is arranged at an included angle relative to the first surface, or the surface of the circuit board is an arc concave surface, compared with the condition that the front surface of the circuit board is arranged in a single plane in the prior art, the width of the circuit board is reduced, so that the LED lamp strip after encapsulation becomes narrower, and the LED lamp strip can be installed at a narrower place; because the width of the circuit board is reduced, the required sizing material is less when in encapsulation, and the use amount of the sizing material is reduced, so that the manufacturing cost of the LED lamp strip is reduced.

Drawings

FIG. 1 is a schematic perspective view of a planar circuit board in the prior art;

fig. 2 is a schematic structural view of the circuit board shown in fig. 1 when a bending slit is provided;

fig. 3 is a schematic structural diagram of the circuit board shown in fig. 2 after being bent at two sides to form a lampshade structure;

FIG. 4 is a schematic view of FIG. 3 projected from a length direction;

FIG. 5 is a schematic perspective view of the lamp housing of FIG. 3 after encapsulation to form a waterproof strip;

FIG. 6 is a schematic view of FIG. 5 projected from a length direction;

FIG. 7 is a transverse cross-sectional view of the waterproof light strip of FIG. 5;

fig. 8 is a schematic diagram of a circuit board with a lampshade structure formed by bending one side in a three-dimensional structure in an embodiment of the utility model;

FIG. 9 is a schematic perspective view of the encapsulated waterproof light strip of FIG. 8;

fig. 10 is a schematic perspective view of a circuit board with a front surface having an arc concave surface according to an embodiment of the present utility model;

FIG. 11 is a schematic perspective view of the encapsulated waterproof light strip of FIG. 10;

FIG. 12 is a schematic plan view of a circuit board according to an embodiment of the present utility model;

reference numerals illustrate: the LED chip comprises a 1-circuit board, a 11-first surface, a 12-second surface, a 13-arc concave surface, a 131-concave side surface, a 132-concave bottom surface, a 14-third surface, a 15-bending gap, a 2-metal circuit layer, a 3-solder mask layer, a 31-pad window, a 4-rubber sleeve and a 5-LED.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments and features in the embodiments described below may be arbitrarily combined with each other.

The following provides many different embodiments or examples for implementing the structure of the present utility model.

Referring to fig. 1-12, an embodiment of a first aspect of the present utility model provides a lampshade circuit board, which has a front surface, wherein a surface of the circuit board for mounting electronic components is called a front surface, a surface not for mounting electronic components is called a back surface, and the circuit board may have only one front surface or two front surfaces; the circuit board 1 comprises a metal circuit layer 2, wherein the metal circuit layer 2 is generally a copper circuit layer, a solder mask layer 3 is arranged on the metal circuit layer 2, the solder mask layer can be solder mask ink or a solder mask, a plurality of pad windows 31 are arranged on the solder mask layer 3, the metal circuit layer 2 is not covered by the solder mask layer 3 at the positions of the pad windows 31, and the metal circuit layer 2 is exposed at the positions of the pad windows so as to be convenient for welding electronic elements or external leads; referring specifically to fig. 3, 4 and 9, the front surface of the circuit board 1 has a first surface 11 and a second surface 12, the second surface 12 is located on one side of the first surface 11 in the width direction of the circuit board, in this embodiment, the second surface 12 has the same length as the first surface 11 and is equal to the length of the lamp strip, the pad window 31 is partially or completely disposed on the first surface, the pad window 31 may be completely disposed on the first surface 11, when the LED lamp strip is made, the electronic component is soldered on the first surface 11, the external lead (positive and negative lead) or the terminal is also electrically connected with the metal circuit layer exposed at the position of the pad window 31 on the first surface 11, the pad window 31 may also be partially disposed on the first surface 11, and partially disposed on the second surface 12, where the LED is soldered on the first surface, and the external lead or the terminal may be electrically connected with the metal circuit layer exposed at the position of the pad window 31 on the second surface 12; referring specifically to fig. 4, the second surface 12 is disposed at an angle a with the first surface 11, and an angle a=135° between the second surface 12 and the first surface 11 in this embodiment is 90 ° -a < 180 °; in other embodiments of the present utility model, referring specifically to fig. 10 and 11, the front surface of the circuit board is an arc-shaped concave surface 13, the arc-shaped concave surface 13 includes a concave side surface 131 and a concave bottom surface 132, and the pad window 31 is partially or fully disposed at the concave bottom surface 132 of the arc-shaped concave surface 13. The circuit board is in a lamp-shade configuration by providing the first surface 11 and the second surface 12, or by providing the front surface as an arc-shaped concave surface.

Referring specifically to fig. 3-6, in some embodiments of the present utility model, the circuit board further includes a third surface 14, where the third surface 14 is located on the other side of the first surface 11 in the width direction of the circuit board, so that the second surface 12 and the third surface 14 are located on two sides of the first surface 11, respectively, and the third surface 14 is disposed at an angle b with respect to the first surface 11, where b is greater than or equal to 90 ° and less than 180 °. That is, the circuit board may be bent on one side to form the second surface 12, or may be bent on both sides to form the second surface 12 and the third surface 14, and the second surface 12 and the third surface 14 may be symmetrically disposed, i.e. a=b, or may be asymmetrically disposed, i.e. a is different from b.

In some embodiments of the present utility model, the first surface 11, the second surface 12, and the third surface 14 are integrally formed, and the second surface 12 and the third surface 14 are formed by bending with respect to the first surface 11. Specifically, when the circuit board is manufactured, the circuit board may be manufactured into a planar board shown in fig. 1, and then bent into the shape shown in fig. 3 by a mold to obtain the second surface 12 and the third surface 14, and in order to facilitate bending, in this embodiment, a plurality of bending slits 15 may be provided on the planar board shown in fig. 1 to obtain fig. 2, and then bending is performed by the mold to reduce stress at the bending position.

The second surface 12, the third surface 14, and the concave side 131 are used for reflecting the light emitted by the LED forward, so that a part of the light emitted by the LED can be utilized to form light to improve the light-emitting efficiency under the same power, and therefore, in some embodiments of the present utility model, the second surface 12, the third surface 14, and the concave side 131 are silvery or white to improve the efficiency of the reflected light.

The first surface 11, the second surface 12, and the third surface 14 divide the circuit board into three areas, and the number of circuit layers in the three areas may be the same or different, specifically, in some embodiments of the present utility model, the circuit board in the middle area is a single-layer circuit, and the circuit boards on two sides are double-layer circuits; in other embodiments, the three regions are all single layer lines, or all double layer lines.

For the circuit board for the LED lamp strip, in order to facilitate a user to cut the LED lamp strip into required lengths according to the use requirement, a scissor position (not shown in drawing) capable of being used in a shearing mode can be arranged on the circuit board, at least 2 connecting pads are arranged on the scissor position, after the user shears the LED lamp strip at the scissor position, external wires can be directly welded on the connecting pads, the connecting pads can be arranged in a middle area, can also be arranged in one side area or two side areas of the circuit board, can also be arranged in the middle area, and can be arranged in one side area or two side areas of the circuit board; for the structure that the front surface of the circuit board is an arc concave surface, the connection pads may be disposed on the concave bottom surface 132, or/and the concave side surface 131.

An embodiment of a second aspect of the present utility model provides an LED light strip, including the circuit board according to any one of the embodiments of the first aspect, where an electronic component is disposed on the circuit board, where the electronic component includes an LED5, and the electronic component may also include a resistor and so on; the waterproof lamp strip also comprises a rubber sleeve 4, wherein the rubber sleeve 4 can be polyvinyl chloride resin or silica gel, and the rubber sleeve 4 coats the circuit board 1 and the electronic components thereon so as to obtain the waterproof lamp strip.

In order to make the light emitted by the LED emit as much forward as possible, the light reflection effect of the second surface 12, the concave side surface 131, etc. is fully exerted, and in some embodiments of the present utility model, the LED5 is disposed on the first surface 11 or on the concave bottom surface 132.

Referring to fig. 6 specifically, in some embodiments of the present utility model, the distance between the light emitting surface of the LED5 and the inner surface of the rubber sleeve is c, where c is greater than 0, so that a larger space is provided between the LED5 and the rubber sleeve 4 to dissipate heat, and the LED is prevented from operating in a high-temperature environment, so as to prolong the service life of the LED, and meanwhile, the light emitted by the LED5 is more beneficial to light reflection, specifically, a part of the light directly passes through the rubber sleeve 4 and is emitted outwards, a part of the light is reflected by the rubber sleeve 4 and is folded back to the first surface 11 or the concave side 131, the reflected light passes through the rubber sleeve 4 and is emitted outwards, and a part of the light directly passes through the first surface 11 or the concave side 131 and is emitted outwards after being reflected.

The front surface of the circuit board 1 is divided into at least a first surface 11 and a second surface 12, the pad window 31 is partially or completely arranged on the first surface 11, the second surface 12 and the first surface 11 form an included angle a, 90 degrees is less than or equal to a 180 degrees, or the front surface of the circuit board 1 is provided with an arc concave surface 13, the arc concave surface 13 comprises a concave side surface 131 and a concave bottom surface 132, the pad window 31 is partially or completely arranged at the position of the concave bottom surface 132 of the arc concave surface 13, so that the circuit board is in a lampshade structure, when the circuit board is applied to a waterproof lamp strip, a part of light emitted by an LED arranged on the first surface 11 or the concave bottom surface 132 directly penetrates through the rubber sleeve 4 to be emitted outwards, a part of light reflected by the rubber sleeve 4 penetrates through the first surface 11 or the concave bottom surface 132 to be emitted outwards after being reflected, and a part of light directly penetrates through the rubber sleeve 4 to be emitted outwards after being reflected by the first surface 11 or the concave bottom surface 132, and the light brightness emitted forwards is improved by 15% -20% or so as to improve the brightness; in addition, as the second surface 12 is arranged at an included angle relative to the first surface 11, or the surface of the circuit board is an arc concave surface 13, compared with the condition that the front surface of the circuit board is arranged in a single plane in the prior art, the width of the circuit board is reduced, so that the LED lamp strip after encapsulation is narrower, and the LED lamp strip can be arranged at a narrower place; because the width of the circuit board is reduced, the required sizing material is less when in encapsulation, and the use amount of the sizing material is reduced, so that the manufacturing cost of the LED lamp strip is reduced.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (11)

1. A lamp-shade-type circuit board having a front face, characterized in that: the metal circuit layer is provided with a solder mask layer, a plurality of pad windows are arranged on the solder mask layer, and the metal circuit layer is uncovered by the solder mask layer at the positions of the pad windows; the front of the circuit board is provided with a first surface and a second surface, the second surface is positioned on one side of the first surface in the width direction of the circuit board, the bonding pad window is partially or completely arranged on the first surface, an included angle a is formed between the second surface and the first surface, the included angle a is more than or equal to 90 degrees and less than 180 degrees, or the front of the circuit board is an arc-shaped concave surface, the arc-shaped concave surface comprises a concave side surface and a concave bottom surface, and the bonding pad window is partially or completely arranged on the concave bottom surface of the arc-shaped concave surface, so that the circuit board is in a lampshade structure.

2. The lamp-covered wiring board of claim 1, wherein: the novel circuit board further comprises a third surface, the third surface is positioned on the other side of the first surface in the width direction of the circuit board, the second surface and the third surface are respectively positioned on two sides of the first surface, an included angle b is formed between the third surface and the first surface, and b is more than or equal to 90 degrees and less than 180 degrees.

3. The lamp-covered wiring board of claim 2, wherein: the second surface and the third surface are symmetrically arranged.

4. A lamp-covered wiring board according to claim 2 or 3, characterized in that: the first surface, the second surface and the third surface are integrally formed, and the second surface and the third surface are formed by bending relative to the first surface.

5. The lamp-covered circuit board of claim 4, wherein: a plurality of bending gaps are formed in the bending positions.

6. The lamp-covered wiring board of claim 2, wherein: the second surface, the third surface and the concave side are silver or white.

7. The lamp-covered wiring board of claim 2, wherein: the circuit board is divided into three areas by the first surface, the second surface and the third surface, wherein the circuit board in the middle area is a single-layer circuit, and the circuit boards on two sides are double-layer circuits; alternatively, the three regions are all single-layer lines, or all double-layer lines.

8. The lamp-covered circuit board of claim 7, wherein: the circuit board is provided with a scissor position which can be used in a shearing way, the scissor position is provided with at least 2 connecting pads, and the connecting pads are arranged in the middle area or/and one side area or two side areas; alternatively, the connection pads are arranged on the concave bottom surface or/and the concave side surface.

9. The utility model provides a LED lamp area which characterized in that: the circuit board comprises the circuit board according to any one of claims 1-8, wherein the circuit board is provided with electronic components, the electronic components comprise LEDs, and the circuit board further comprises a rubber sleeve, and the circuit board and the electronic components thereon are covered by the rubber sleeve.

10. An LED light strip as set forth in claim 9, wherein: the LED is arranged on the first surface or the concave bottom surface.

11. An LED light strip as set forth in claim 9, wherein: the distance between the light emitting surface of the LED and the inner surface of the rubber sleeve is c, c is more than 0, a part of light emitted by the LED directly penetrates through the rubber sleeve and emits outwards, a part of light is reflected by the rubber sleeve and is folded back to the first surface or the concave side surface, the light penetrates through the rubber sleeve and emits outwards after being reflected, and a part of light directly irradiates the first surface or the concave side surface and emits outwards after being reflected.