JP7319682B2 - long LED emitter - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of long surface-emitting LED light emitters used in various products.

Conventionally, products using LEDs as surface light emitters have been used in various product fields. For example, they are applied to interiors, front grilles, mobile displays, etc. of automobiles, and are used to call attention to the viewer or to present a beautiful appearance. The structure is such that a board with LEDs mounted is housed in a housing with a certain extent or a long housing, and the LED light emitted through the housing is configured into a predetermined module such as a surface light emitter or a line light emitter. It is what I did.

The LED luminous body has a feature that light is highly rectilinear. Therefore, it has been pointed out that LED light emitters have a narrow light-emitting region and non-uniform light emission due to uneven brightness. As a solution to these problems, for example, Patent Document 1 discloses a light source device that widens the light emitting area.

The light source device disclosed in Patent Document 1 includes a cylindrical transparent cover, translucent terminal fixing portions attached to both ends of the transparent cover in the longitudinal direction, and a plurality of light sources installed inside the transparent cover. and a substrate provided with The length in the longitudinal direction of the substrate is slightly shorter than the sum of the length of the transparent cover in the longitudinal direction and the length of the terminal fixing portions at both ends. With such a configuration, light is transmitted from both ends of the light source device, providing a wide light emitting area.

Further, Japanese Patent Laid-Open No. 2002-200002 discloses an illumination device capable of suppressing luminance unevenness and obtaining uniform light emission.

The lighting device disclosed in Patent Document 2 includes a plurality of light emitting elements, a light diffusion structure formed in one-to-one correspondence with each light emitting element, and arranged to cover the light emitting elements and the light diffusion structure. and a cover member having light-transmitting and light-diffusing properties. The lighting device disclosed in Patent Document 2 diffuses the light emitted from the light emitting element by reflection in the light diffusion structure by such a configuration, suppressing luminance unevenness and providing uniform light emission.

As in prior art documents 1 and 2, various proposals have been made to solve the problems of LED light emitters.

JP 2016-35936 A JP 2017-208205 A

However, the LED substrate in the conventional surface emitting LED module is fixed in the housing, and the light emission direction is directly facing the lamp light diffusion plate of the housing, and the light diffusion within the housing is insufficient. Each connection is not sufficient, and the surface emitting LED module is easy to disassemble and be damaged. Furthermore, the flexibility of the surface emitting LED module is insufficient, so it cannot be completely installed according to the shape of various application products, and the LED function is not sufficient. In addition, in general circular cross-section modules, the method of attaching them to products that use LED modules is complicated, and there are various problems such as poor workability. It is a hindrance to the wide spread of LED modules.

In order to solve this problem, the present invention is designed to allow free swinging within a certain range without fixing the surface emitting LED module in the housing. To provide a long LED luminous body LED with the improvement of

The present invention relates to a long LED luminous body in which board-mounted LEDs are accommodated in a housing made of a flexible material and having a substantially rectangular cross-section in the longitudinal direction. The board-mounted LED that is not fixed inside is housed without being fixed in the space surrounded by the inner wall of the housing and the regulation projection.

In addition, the light beams emitted from the board-mounted LEDs inside the housing are diffusely reflected toward the inner wall of the housing by configuring the board-mounted LEDs so that the positions of the board-mounted LEDs can be changed.
That is, the board is configured to be able to change its position in the width direction by the difference between the width of the board and the internal width of the housing, and the space surrounded by the inner wall of the housing and the restricting convex part, that is, the board on which the LED is mounted It is stored without being fixed in the space where it moves, and the position of the board changes in the width direction by the difference between the width of the board and the internal width of the housing, so that the LED mounting board moves in the space toward the inner wall of the housing. The emitted light from the LED was reflected by the inner wall surface of the housing in the irradiation direction, and the reflected light was further irradiated toward the inner wall surface of the housing and further reflected to form a diffuse reflection state.

Further, the outer peripheral wall of the housing is colored black, and the inner wall is white or milky white in color so that the LED light does not leak from the black outer peripheral wall to the outside of the housing .

In addition, a reinforcing plate is pasted on the back surface of the LED mounting board in the part corresponding to the LED.

In addition, a cap is attached to the end of the long housing having a substantially rectangular cross section, and the cap is composed of a lid portion that closes the opening of the housing and a cap body protruding from the rear surface of the lid portion. The cap body is configured to be tightly fixed to the inner wall of the housing opening by unevenly fitting with the inner wall of the housing opening, and the housing and the cap body are integrated by a fixing pin inserted from the outside of the wall of the housing. It is characterized by being fixed.

In addition, an injection port for injecting the adhesive is formed on the side surface of the lid portion of the cap, and the injection port is provided on the outer side surface of the cap body and communicates with a large number of slits so that the adhesive is injected from the injection port through the slits. It is characterized in that it penetrates into the joint between the cap body and the inner wall of the opening of the housing by a capillary function.

According to the invention of claim 1, in the elongated LED luminous body in which a board on which an LED is mounted is housed in a housing made of a flexible material and having a substantially rectangular cross section, a restricting protrusion is provided inside the housing. The position of the substrate can be changed in the width direction by the difference between the width of the substrate on which the LEDs are mounted facing each other and are not fixed inside the housing and the internal width of the housing, and the position of the substrate can be changed in the width direction. In other words, the board-mounted LED is housed without being fixed in the space where the board on which the LED is mounted changes its position. The board is placed on the bottom of the housing so that the LED light-emitting surface faces the ceiling of the housing. The LED mounted substrate moves in space as the position changes, and the LED light emitted toward the inner wall surface of the housing is reflected by the inner wall surface of the housing in the irradiation direction, and the reflected light is further irradiated toward the inner wall surface of the housing. Furthermore, the outer peripheral wall of the housing is colored black, and the inner wall is white or milky white, and the LED light leaks from the black outer peripheral wall to the outside of the housing. By not doing so, the various functions described below can be fulfilled, and in addition to being able to irradiate the LED light in a complicated manner to improve the light emitting function of the surroundings, it is also possible to easily perform the bending work when mounting the housing. This has the effect of enabling reliable mounting.

In addition, the housing is formed longitudinally and is formed using a flexible material such as an elastomer resin. As a result, when the LED light emitter according to the present invention is mounted on a curved surface position such as a dashboard of an automobile or a position where the outer diameter has an uneven shape or a curved shape such as the edge of the bonnet, the housing is the object to be mounted. It will be bent according to the uneven shape of the outer shape provided by. By performing such bending mounting, the housing between the LEDs that are light-scattering mounted at regular intervals is also deformed.

In this way, if the housing is deformed together with the built-in substrate or by itself, the LED mounted on the board swings in the swinging space of the housing so as to point in any direction according to the deformation of the housing. In other words, the direction of light emission of the LED changes intricately along with the oscillation of the board-mounted LED.

A feature of the present invention resides in that the cause of the complex changes in the light emitting direction of the LEDs is the swinging of the LEDs due to the deformation of the housing. Moreover, the complex directivity of such LED emitters is reinforced between adjacent LEDs arranged on the substrate at regular intervals. In other words, the light emission of adjacent LEDs overlaps in a complicated manner due to oscillation, so that a light-emitting layer is also formed between the adjacent LEDs. The light-emitting layer formed between the adjacent LEDs solves the original situation in which the position of the LEDs where the light scatters emits light and the light emission illuminance between the LEDs decreases. Also, a constant illuminance is generated uniformly, and there is an effect that surface light can be emitted from the light emitting surface of the housing, which is an illumination window.

In addition, the housing and base made of flexible materials are mounted by being bent and deformed along the outer shape of the mounting object, and the LED mounting board is mounted on the inner wall of the swinging space provided by the housing. It will oscillate all over the place. In this manner, the structure in which the LED mounting board is allowed to swing inside the housing can prevent damage to the members caused by the difference in thermal shrinkage between the LED mounting board and the housing. Since the thermal shrinkage rate varies depending on the materials that make up the members, when members made of different materials are connected, there has been a problem of reduced durability due to thermal stress generated between the members. That is, the independent arrangement of the LED mounting board and the housing makes it possible to avoid the influence of the difference in thermal contraction rate and to provide high durability against heat.

In addition , the light beams emitted from the multiple LEDs mounted on the board inside the housing are configured so that the LEDs mounted on the board can oscillate, so that they are diffusely reflected toward the inner wall surface of the housing. The light emitted from the board-mounted LEDs is reflected and diffused in all directions inside the housing without concentrating on one point, especially on the diffusion plate that forms the LED irradiation window formed on one side of the housing, thereby increasing the illuminance. There is an effect that it can be raised to improve the lighting efficiency.

In addition , the outer wall of the housing is colored black, and the inner wall is white or milky white, which makes it easy for the LED light to be diffusely reflected inside the housing. Therefore, there is an effect that the LED light can be prevented from leaking to the outside of the housing as much as possible, and the illumination efficiency can be further improved by increasing the irradiance of the light from the diffusion plate of the housing.

Further, according to the second aspect of the invention, a reinforcing plate is pasted on the back surface of the LED mounting board at the part corresponding to the LED, so that the risk of the LED peeling off from the board due to bending of the board can be prevented. There is an effect that can be done.

Further, according to the invention of claim 3 , a cap is attached to the end of the long housing having a substantially rectangular cross section, and the cap is attached to the lid portion that closes the opening of the housing and the back surface of the lid portion. The cap body and the cap body are integrally fixed by a fixing pin inserted from the outside of the wall body of the housing, so that the cap and the housing opening are securely connected. can be reliably fixed integrally, and the adhesive penetrates into the joint surface between the inner wall of the opening of the housing and the cap body to achieve a more reliable bonding function.

According to the fourth aspect of the present invention, an injection port for injecting the adhesive is formed on the side surface of the lid portion of the cap, and the injection port is provided on the outer side surface of the cap body and communicates with a large number of slits. Therefore, the adhesive penetrates into the joint between the cap body and the inner wall of the housing opening through the slit from the adhesive injection port, achieving a tighter joint function and making the inside of the housing a completely shielded space from the atmosphere to protect the LED module. There is an effect that can be

1 is a schematic diagram illustrating an LED light emitter according to the present invention; FIG. FIG. 4 is a side cross-sectional view of a housing that constitutes the LED light emitter; FIG. 4 is a side cross-sectional view of a housing for explaining movement of light emitted from an LED; FIG. 4 is a schematic diagram illustrating a state in which the harness is pulled out to the opposite side of the diffusion plate provided in the housing; FIG. 5 is a diagram illustrating a structural example of a cap attached and fixed to an end of a housing in close contact. FIG. 5 is a diagram illustrating a structural example of a cap attached and fixed to an end of a housing in close contact. FIG. 5 is a diagram illustrating a structural example of a cap attached and fixed to an end of a housing in close contact. FIG. 8 is a plan view illustrating how the cap illustrated in FIG. 7 is attached and fixed to the end portion of the housing; It is the schematic explaining the structure of harness. It is the top view and its sectional view explaining a mode that two adjacent board|substrates are connected in series.

The gist of the present invention is a surface-emitting LED module in which board-mounted LEDs are housed in a housing made of a flexible material and having a substantially square cross-section in the longitudinal direction. The present invention relates to housing a substrate-mounted LED that is not fixed inside a body in a swinging space surrounded by an inner wall of a housing and a restricting convex portion.

In addition, the light rays emitted from the multiple LEDs mounted on the board inside the housing are diffusely reflected toward the inner wall of the housing by configuring the LEDs mounted on the board to swing freely, and the outer wall of the housing is black. In addition, the inner wall surface is white or milky white in color to diffuse the directivity of the LED light, thereby reducing the transmittance of the LED light to the outside of the housing and preventing the LED light from leaking to the outside as much as possible. It is characterized by being configured as follows.

In addition, a reinforcing plate is pasted on the back surface of the LED mounting board in the part corresponding to the LED.

In addition, a cap is attached to the end of the long housing having a substantially rectangular cross section, and the cap is composed of a lid portion that closes the opening of the housing and a cap body protruding from the rear surface of the lid portion. The cap body is configured to be tightly fixed to the inner wall of the housing opening by unevenly fitting with the inner wall of the housing opening, and the housing and the cap body are integrated by a fixing pin inserted from the outside of the wall of the housing. It is characterized by being fixed.

An embodiment of the invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram of an elongated LED light emitter 1 of the present invention.

As shown in FIG. 2, the elongated LED light emitter 1 of the present invention constitutes an LED module 20 that emits surface light, in which an LED 22 mounted on a board 21 is housed in a housing 10 having a substantially rectangular cross section. The housing 10 has a substantially square hollow cross-section and is made of resin and is elongated. One outer surface 10a is made of a milky white diffusion plate 11 made of styrene elastomer resin, and the other three surfaces 10b are made of black olefin elastomer. The color of the outside made of resin prevents the LED light inside the housing from leaking to the outside of the housing as much as possible, and also diffuses the light to increase the degree of illumination.

Reflecting portions 12 made of white styrene-based elastomer resin and having a constant thickness are formed on three sides 10b of the hollow inner side surface of the housing 10, excluding the diffuser plate 11 (one side 10a constituting the housing 10). .

In addition, as shown in FIG. 2, on the hollow inner side surface of the housing 10, the diffusing plate 11 and the opposing inner wall surface 10b' are provided with restricting projections 13 which are opposed to each other at a constant interval. The restricting convex portion 13 is made of styrene-based elastomer resin forming the inner wall of the housing.

Moreover, as shown in FIG. 2, the space in the lower half formed by the restricting projections 13 in the housing 10 forms a swinging space 14 in which the LED 22 mounted on the board 21 is accommodated.

In this way, the LED 22 mounted on the substrate 21 is housed in the swinging space 14 inside the housing 10, and the width W1 of the substrate 21 is narrower than the internal width W2 of the housing 10. It is formed to be wider than the interval W3, and by such comparative formation of the width, the board-mounted LED is configured to be swingably variable without being fixed in the swinging space. That is, the width W1 of the LED 22 mounted on the substrate 21 is formed so as to satisfy W3<W1<W2.

Therefore, with such a configuration, the LEDs 22 mounted on the substrate 21 are placed on the bottom 10c of the housing 10 when the diffusion plate 11 is positioned laterally, and the LED light emitting surface 22a is oriented toward the ceiling surface 10d of the housing 10. It becomes a posture to do.

In this posture, the light from the LED 22, as shown in FIG. The light is diffusely reflected and finally condensed in the direction of the diffuser plate 11 and transmitted through the diffuser plate 11 to illuminate the outside of the housing 10 . In FIG. 3, the white arrow whose base end is in the vicinity of the LED light emitting surface 22a indicates the light emitted from the LED light emitting surface 22a, and the white arrow whose base end is in the vicinity of the reflecting portion 12 reflects irregularly at the reflecting portion 12. light.

That is, by diffusing the directivity of the LED light, the transmittance of the LED light to the outside of the housing 10 is lowered to prevent leakage of the LED light to the outside as much as possible. In addition, a reinforcing plate 23 is pasted on the rear surface 20a of the surface-emitting LED module 20 to prevent the LEDs 22 from peeling off from the substrate 21 even when the substrate 21 is bent.

Further, as shown in FIGS. 10(a) and 10(b), substrates 21 and 21' of a certain length form a surface-emitting LED module 20 of a long length through a pattern connected in series. For example, the ends of the LED substrates 21 are stacked one on top of the other and bonded with preliminary solder 24 therebetween. In the figure, reference numeral 25 (25a, 25b) indicates a bonding pattern between the ends of the substrates 21, 21' to be bonded. 10(a) is a plan view showing the vicinity of the end portions of the two substrates 21 and 21' to be bonded, and FIG. 10(b) is a side view explaining the structure of FIG. 10(a). be.

A bonding pattern between the ends of the substrates 21 and 21' will be specifically described. The end portion of the LED substrate 21 and the end portion of the LED substrate 21' are vertically stacked as shown in FIG. A belt-shaped jumper 26 having an opening substantially in the middle is attached to the upper portion of the two stacked substrates 21 and 21'. The LEDs 22 attached to the substrates 21 and 21' are exposed from the openings 26a of the jumper 26. As shown in FIG.

A pattern 25 (25a) is provided on the lower surface of the jumper 26 (the side facing the substrates 21 and 21'). Between the jumper 26 and the substrate 21', a gap corresponding to approximately the thickness of the substrate 21 is created. Preliminary solder 24 is provided to fill this gap. That is, the preliminary solder 24 is formed so as to connect the pattern 25 (25b) and the pattern 25 (25a) on the substrate 21'.

Suppose a current is flowing from substrate 21 to substrate 21'. With such a structure, the current flows through the following routes. That is, current flows in the order of substrate 21, pattern 25a, jumper 26, preliminary solder 24, pattern 25b, and substrate 21'. As a result, the LEDs 22 mounted on the substrate 21 and the LEDs 22 mounted on the substrate 21' emit light in conjunction with each other.

Therefore, the two substrates 21, 21' connected using the jumper 26 form a rigidly integrated substrate. Moreover, since the jumper 26 does not hide the LEDs 22 mounted on the ends of the board 21 and the board 21' due to the opening 26a provided in the jumper 26, the luminance is not lowered.

Since the end of the housing 10 has an opening (hereinafter referred to as an opening 15), a cap 30 is tightly attached and fixed to the end of the long housing 10 in order to seal the inside of the housing 10. ing. That is, as shown in FIG. 5, the cap 30 is a flat plate lid portion 31 that closes the opening portion 15 of the housing 10 and protrudes from the rear surface 31a of the lid portion 31 to cover the opening portion 15 at the end of the housing 10. It consists of a rectangular cap body 32 that can be fitted.

Left and right side surfaces 32 a of the rectangular cap body 32 are provided with cutouts 33 so as to engage with the left and right restricting projections 13 projecting from the inner wall of the opening 15 of the housing 10 .

Furthermore, as shown in FIG. 6, two pin holes 34 are formed on the top surface 10d of the housing 10, and pin holes 34 are formed on the upper surface 32b of the cap body 32 at positions corresponding to the pin holes 34. When the fitting hole 35 is bored and the cap body 32 is fitted to the end opening 15 of the housing 10, the fixing pin 36 is inserted from the pin hole 34 into the pin fitting hole 35 to perform the locking function of the cap body 32. configured to fulfill.

As shown in FIGS. 7 and 8, the upper side surface 32b and the left and right side surfaces 32a of the cap main body 32 are formed with tooth-like slits 37 through which the liquid adhesive flows. An external adhesive injection port 38 communicating with the slit 37 is notched in the ceiling surface 31 b of the lid portion 31 . When the liquid adhesive is introduced from the external adhesive injection port 38, the adhesive enters the joint between the inner wall of the opening 15 of the housing 10 and the outer surface of the cap body 32 through the slit 37 by capillary action, and joins with the adhesive. The cap 30 is tightly sealed to the opening 15 of the housing 10 through an integral fitting structure, thereby improving the integrity and enabling the long LED luminous body 1 to be manufactured permanently.

As shown in FIGS. 7 and 8, the lid portion side surface 30a (the ceiling surface 31b of the lid portion 31) of the cap 30 is formed with an external adhesive injection port 38 for injecting an adhesive. The injection port 38 communicates with a number of slits 37 provided on the outer surface (32a and 32b) of the cap body 32, so that the external adhesive injection port 38 passes through the slits 37 to the opening of the cap body 32 and the housing 10. 15 It penetrates into the joint with the inner wall to achieve a tighter joint function, and protects the LED module 20 housed inside as a shut-off space that shuts off the inside of the housing 10 from the atmosphere from external humidity, water leakage, and contaminants. .

Further, since the outer shape of the housing 10 is rectangular as described above, it can be easily mounted in close contact using the rectangular plane when mounted on another product. The housing can be adhered to the flat portion of another product via the .

A harness 40 for connecting between the LEDs 22 is wired inside the housing 10. Specifically, as shown in FIG. Four harnesses 40 are regularly arranged vertically and horizontally inside a branch case 47 containing a filler 41 . In the figure, reference numeral 42 denotes an insulator around the harness, and reference numeral 43 denotes a conductor. 9A is a diagram for explaining the structure of the branch case 47, FIG. 9B is a cross-sectional view of the branch case 47, and FIG. It is a figure near the harness cap 46 which connects with.

When the harness 40 led out from the housing 10 is connected to the next adjacent housing 10', the harness styrene elastomer resin is wired on the extension line of the housing 10 as shown in FIG. However, if the diffusion plate 11 of the light emitting surface is mounted as the front exposed side, the harness 40 will not enter the set frame 44 and spoil the appearance. However, in order to do so, a lead-out hole 45 for lead-out of the harness must be drilled in the wall surface of the housing 10 (on the side of the housing 10b'), which impairs the hermeticity of the housing 10. FIG. For this purpose, as shown in FIG. 4B, a branch case 47 is connected to a harness cap 46 attached to the end of the housing 10, and the harness 40 is routed from the lid portion 48 of the harness cap 46. It is constructed so as to secure the airtightness of the inside of the housing 10 together with the wiring of the housing 10 .

1 LED emitter 10 housing 10a one surface of housing (diffusion plate side)
10b Three sides of housing 10b' One side of housing (opposite side of diffusion plate)
10c Bottom of housing 10d Ceiling surface of housing 11 Diffusion plate 12 Reflector 13 Control projection 14 Swing space 15 Opening 20 LED module 20a Rear surface of LED module 21 Substrate 22 LED
22a LED light emitting surface 23 Reinforcement plate 24 Preliminary solder 25 Pattern 26 Jumper 26a Opening 30 Cap 31 Lid 31a Back of lid 31b Ceiling surface of lid 32 Cap main body 32a Left and right sides of cap main body 32b Upper side of cap main body 33 Cut Notch 34 Pin hole 35 Pin insertion hole 36 Fixing pin 37 Slit 38 External adhesive inlet 40 Harness 41 Buffer filler 42 Insulator 43 Conductor 44 Set frame 45 Lead-out hole 46 Harness cap 47 Branch case 48 Lid
W1 Width of board-mounted LED W2 Internal width of housing W3 Interval between opposing protrusions

Claims (4)

A long LED luminous body containing a board on which an LED is mounted is housed in a housing made of a flexible material and having a substantially rectangular cross section that is flexible and deformable along the contour of the object to be mounted , In the space below the regulating protrusions, which are protruding from the inside of the housing, the board with the LED mounted on it that is not fixed inside the housing is accommodated. The position of the substrate can be changed in the width direction by the width difference, and the substrate mounted with the LED is a space surrounded by the inner wall of the housing and the regulating protrusion, that is, the position of the substrate mounted with the LED can be changed. By storing the board-mounted LEDs in the available space without being fixed, the LED light-emitting surface will be placed on the bottom of the housing when the diffusion plate of the housing is located on the side. is configured so that it faces the ceiling surface of the housing , and the position of the board can be changed in the width direction by the difference between the width of the board and the internal width of the housing, and the LED mounted board moves in the space. The light beam of the LED irradiated toward the inner wall surface of the housing is reflected by the inner wall surface of the housing in the irradiation direction, and the reflected light beam is further irradiated toward the inner wall surface of the housing and further reflected to form a diffuse reflection state. A long LED light emitter characterized in that the outer peripheral wall of the housing is colored black, and the inner wall is white or milky white in color so that the LED light does not leak from the black outer peripheral wall to the outside of the housing. . 2. The elongated LED light emitter according to claim 1, wherein a reinforcing plate is pasted on a portion corresponding to the LED on the rear surface of the LED mounting substrate. A cap is attached to the end of a long housing having a substantially rectangular cross section, and the cap is composed of a lid that closes the opening of the housing and a cap body protruding from the back of the lid,
The cap body is configured so that it can be tightly fixed to the inner wall of the housing opening by unevenly fitting with the inner wall of the housing opening, and the housing and the cap body are integrally fixed by a fixing pin inserted from the outside of the wall of the housing. In addition, a large number of slits are formed in the outer surface of the cap body, and the adhesive from the slits penetrates the joint between the cap body and the inner wall of the opening of the housing by capillary phenomenon. Item 3. An elongated LED light emitter according to item 1 or 2. An inlet for injecting the adhesive is formed on the side surface of the lid of the cap, and the inlet communicates with a large number of slits formed in the outer surface of the cap body so that the adhesive is injected from the inlet through the slit into the cap. 4. The elongated LED luminous body according to claim 3, characterized in that it is constructed so as to penetrate into the joint between the main body and the inner wall of the opening of the housing by a capillary function.

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