JPH03186886A - Porous sheet packing for display device - Google Patents

Abstract

PURPOSE:To improve the waterproof property and loading workability for many light emitting body loading parts arrayed on the surface plate of a case body by forming a connection film thinner than the cross-sectional diameter of a packing part, forming many through holes corresponding to the array parts of respective light emitters and unitedly connecting respective packing parts like a face through the connection films. CONSTITUTION:When many light emitting bodies 4 are inserted into packing parts 1c to cover the surface plate 3 of the case body, the packing parts 1c are pressed against the outer peripheries of the bodies 4, their contact parts are closed and the surface plate (3) side is closed and water-proofed by the connection films 1a. Even if the packing parts 1c are elastically deformed by the outer diameters of the light emitters 4 at the time of loading the packing parts 1c, the deformed parts are distored to the connection film (1a) side, the positions of the packing parts 1c are moved and stucked fast to the outer peripheries of the light emitters 4. Each connection film 1a is formed thinner than the cross-sectional diameter of the packing part. In the case of inserting the light emitter 4 between respective packing parts 1c, the body 4 can simply be loaded to the surface plate 3 of the case body only by applying small insertion pressure.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a display device constructed using a large number of light emitting elements (hereinafter referred to as "light emitters") such as light emitting diodes and small light bulbs in which light sources are arranged in a matrix. The present invention relates to a waterproof structure, and more particularly to a structure of a porous sheet packing for waterproofing a light emitter mounting portion to a surface plate of a casing.

[Conventional technology]

BACKGROUND ART Conventionally, a large number of light emitters arranged in a matrix has been used as a light source for a display device included in an information display panel that displays various information such as road information. In many of this type of display devices, a predetermined number of light emitters are unitized and released, and the plurality of unitized display devices are arranged vertically and horizontally to form a single information display panel. 9 and 1O (al to (C1) are light emitting diodes used as the light emitters 51 of the display device 50, and a large number of them arranged in a matrix in a rectangular frame-shaped housing 52 to form a unit. The figure shows each light emitter 51 on the substrate 5.
The light-emitting parts 51a of each light-emitting body 51 are mounted in the housing 52 in a state in which they are fixed in parallel on the surface plate 54 of the housing 52.
It protrudes forward from the housing 52 through through holes 55 formed in a matrix. The through hole 55 is provided with the light emitting body 5.
1 has an inner diameter W1 that allows the light emitting body 5 to be inserted through the through hole 55 from the back side thereof.
Regarding the waterproof structure for the attached part 1, the light emitting body 51
A large number of through holes 56 have an inner diameter W3 (W2>W3) that is slightly smaller than the outer diameter W2 of each light emitting body 51.
A perforated sheet packing 57 made of synthetic rubber or other elastic synthetic resin having a hole is coated on the surface plate 54, and is tightly attached to the outer periphery of the light emitting body 51, and the surface of the surface plate 54 is covered so that the surface plate 54 side (As shown in FIGS. 10 (aj and bl) and 1), a porous sheet is formed with holes 58 having a substantially U-shaped cross section. The packing 57 is fitted into the through hole 55 from the back side of the top plate 54, and each light emitting body 51 is mounted so as to protrude to the front of the top plate 54 via the hole 58 of the porous seal 57. A waterproof structure for the face plate 54 side is constructed, and as shown in FIG.
A porous sheet packing 57 having a through hole 56 with an inner diameter W3 of about the same size as the above is covered, and a restraining plate 59 is placed over it, and the porous sheet packing 57 is compressed between the pressing plate 59 and the surface plate 54. The through holes 56 of the porous sheet packing 57
A method is used, such as changing the cross-sectional shape of the inner edge of the light emitting element 51 and pressing it against the outer periphery of each light emitting body 51 to provide a waterproof effect.

[Problem to be solved by the invention]

However, in the first waterproof structure, the inner diameter W3 of the through hole 56 opened in the plane of the porous sheet packing 57 is smaller than the outer diameter W2 of the light emitting body 51, and the light emitting body is attached to the through hole 56.
1, the through hole 56 is expanded to the outer diameter dimension of the light emitting body 51, and a waterproof effect is obtained in the tightly fitted state due to elastic deformation of the through hole 56 portion of the porous sheet packing 57. When the packing 57 is mounted on the surface plate 54 of the housing 52 while the light emitting body 51 is inserted into the through hole 56, the porous sheet packing 57
The muko has no part to absorb the above-mentioned elastic deformation and requires an extremely large insertion force, and as shown in FIG. 10(C), the center C1 of the light emitting body 51 and the center C2 of the through hole 56 are misaligned. In such a case, there is a problem that a gap S is created in the attachment part of the light emitting body 51, and the waterproof effect is reduced.In addition, in the above-mentioned second waterproof structure, the hole 58 having a U-shaped cross section is Not only is the moldability of the porous sheet packing 57 itself poor, but also the distance W4 between the light emitters 51 and the light emitters 51
If the difference in the outer diameter W2 of the surface plate 54 is small, if the surface plate 54 itself is formed to have a thickness sufficient to ensure its strength, the thickness of the porous sheet packing 57 must be made thinner to that extent, resulting in a decrease in its strength. At the same time, there is a problem that the installation workability is deteriorated, and furthermore, in the third waterproof structure,
In order to elastically deform the porous sheet packing 57 between the presser 59 and the surface plate 54 until it exhibits a sufficient waterproof effect, an extremely large compressive force is not only required, but also the compressive force is applied to the porous sheet packing 57 and the presser 59. It is necessary to distribute the compressive force uniformly, which increases the number of man-hours required for tightening screws, etc., and it is extremely difficult to construct a structure for generating such a compressive force.

The present invention was devised in view of the above-mentioned problems, and allows a large number of light emitters to be arranged on the surface plate of the casing without requiring excessive insertion force or special compression structure for the porous sheet pankin. It is an object of the present invention to provide a porous sheet packing for a display device that has excellent waterproof properties for a mounting portion and excellent mounting workability, and a display device comprising the porous sheet packing.

[Means to solve the problem]

In order to achieve the above object, the porous sheet packing for a display device according to the present invention is a sheet that is closely attached to the outer peripheral surface of a large number of light emitters such as light emitting diodes arranged in a matrix to waterproof the inside and outside of each light emitter mounting part. The packing includes a connecting membrane, a large number of through holes formed in the surface of the connecting membrane, and a large number of ring-shaped packing parts formed at the inner edges of the through holes, and the connecting membrane is connected to the packing part. The main idea is to create a structure that is thinner than the cross-sectional diameter of the light-emitting device, have a large number of through holes corresponding to the placement of each light emitting body, and connect each gasket part integrally in a planar manner with a connecting film. It is something.

The packing portion may be formed into an O-ring shape, an elliptical ring shape, or any other suitable shape having a close contact portion with respect to the viewing body, and each of the packing portions may be made to protrude toward the surface side of the connection film, and the center of rotation thereof may be It is also possible to form the connecting membrane so that it is located outward from the center line of the connecting membrane.

[Effect]

According to the porous sheet packing having the above structure,
By inserting a large number of light emitters into the gasket and covering the surface plate of the casing, the gasket comes into pressure contact with the outer periphery of the light emitters and seals the contact area, and the connecting membrane seals and waterproofs the surface plate side. can do. Even if the packing part is elastically deformed due to the outer diameter of the light emitting body during this installation, the deformed part is distorted toward the connecting membrane that connects the packing part, and the position of the packing part is moved and the outer circumference of the light emitter is moved. closely adhere to.

In addition, since the connecting membrane is formed to be thinner than the cross-sectional diameter of the packing, when inserting the light emitter into each packing part, it can be easily attached onto the case surface plate by applying a small insertion pressure. I can do it.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the porous sheet packing for display devices according to the present invention will be described below with reference to the drawings.

1 to 4 show a display device in which the surface plate 3 of the casing 2 is made waterproof using the perforated sheet packing 1 for display devices according to the present invention. In this embodiment, a large number of light emitting bodies 4 arranged in a matrix are constructed using light emitting diodes, and a plurality of light emitting bodies 4 are arranged in parallel on a plurality of substrates 5, and each light emitting part 4a Each board 5 was inserted from behind into the housing 2 formed into a rectangular bar shape, and each light emitting body 4 was transparently provided in the surface plate 3 of the housing 2. The light-emitting portions 4a are inserted into the through-holes 3a to protrude above the surface plate 3, and a large number of through-holes 1b are formed on the surface plate 3 in a matrix arrangement corresponding to the arrangement of the light-emitting bodies 4. At the same time, a light emitting body 4 is inserted into each through hole 1b of the porous sheet packing 1, and a cover plate 6 is placed on the upper surface thereof. This cover plate 6 has a luminous body 4 similar to the porous sheet packing 1 described above.
A large number of through holes 6a corresponding to the arrangement of Preferably, it is formed from a metal plate such as a metal plate. Furthermore, on the front surface of each light emitting body 4, a light shielding plate is provided with an opening in the irradiation direction of each light emitting body 4 in order to prevent the occurrence of a pseudo lighting phenomenon caused by external light or a phenomenon of light interference between each light emitting body. 7 is installed.

A rear frame 8 is installed at the rear of the housing 2 for supporting and fixing each of the boards 5 individually within the housing 2, and a step 5a formed on the rear edge of each board 5 is attached to the rear frame 8. The structure is designed to press from both sides and prevent each board 5 from being pulled out. Further, the rear frame 8 has hooks 9 formed on the side edges, and when the display device according to the present invention is mounted on the machine frame A of an information display panel, etc. It is set at 0 so that it can be freely fitted and fixed. Reference numeral 10 denotes a motherboard that is attached to the rear end of each board 5 and substantially covers the rear of the housing 2, and a connector 1) for connecting various signal lines or wiring is attached to the surface of the motherboard.

FIG. 5 shows a first embodiment of the porous sheet packing 1 according to the present invention. The porous sheet packing 1 according to this embodiment is designed to closely contact the outer peripheral surface of a large number of light emitters 4 arranged in a matrix on the surface plate 3 of the housing 2 to waterproof the inside and outside of the mounting portion of each light emitter 4. The porous sheet packing 1 is a connecting membrane 1 made of synthetic rubber or other elastic synthetic resin material having approximately the same width as the front opening of the housing 2.
A large number of through holes 1b are formed on three sides corresponding to the arrangement of the light emitting bodies 4, and the inner edge of each hole 1b is integrally shaped as a ring-shaped packing part IC, and the connecting membrane is 1a
The film thickness T1 is thinner than the cross-sectional diameter T2 of the packing part IC.
(TI<72), and a lip (not shown) for waterproofing the inner peripheral edge of the housing 2 is appropriately formed on the outer peripheral portion.

The inner diameter W3 of the packing part IC is the outer diameter W2 of the light emitter 4.
When the light emitting body 4 is inserted into the packing part IC, its inner edge is in close contact with the outer periphery of the light emitting body 4 to generate a predetermined contact pressure. The contact part is completely waterproof, and a light emitter 4 is installed inside the packing part IC.
The expansion of the inner diameter W3 and the center C caused by inserting the
The structure is such that elastic deformation such as movement between two positions is absorbed by the connecting membrane 1a portion. Further, the porous sheet packing 1 according to the present invention has no holes or other permeable parts formed on the membrane surface of the connecting membrane 1a other than the through holes 1b that form the packing part IC. When the perforated sheet packing 1 according to the above is mounted on the surface plate 3 of the casing 2, the inside thereof is completely sealed by the connecting membrane 1a, so that rainwater etc. are prevented from entering into the casing 2. As described above, the connecting membrane 1a
Since the film thickness T1 of the part is thinner than the cross-sectional diameter T2 of the packing part 1c (TL<T2), the packing part I
The elastic deformation occurring in C and the movement of the center C2 can be easily absorbed. The ease of attaching the porous sheet packing 1 to the body 4 and the workability can be improved.

Note that the shape of the packing part 1c formed at the inner edge of the through hole 1b is not necessarily limited to the above-mentioned 01J shape, and the cross-sectional shape may be elliptical or oval, or even polygonal. It goes without saying that the design can be freely modified as long as it is in close contact with the outer periphery of the body 4 and has a waterproof effect on that part.

FIG. 6 (al and (bl) show the second embodiment of the porous sheet packing I according to the present invention. To explain the different parts from the first embodiment, the packing part I
Each packing part 1c is placed on the surface side of the connecting membrane 1a so that the cross-sectional rotation center C3 of C is located at the membrane center line C4 of the connecting membrane 1a or in front of the membrane center line C4, that is, on the insertion direction side of the light emitter 4. It is formed to protrude (see figure (b)).

When the packing part IC is formed to protrude from the surface side of the connecting film 1a in this way, when the light emitting body 4 is inserted into the packing part 1c3, the packing part IC generates a frictional force in the insertion direction on the outer peripheral part of the light emitting body 4. (in the arrow Y direction), the light emitting body 4 is inserted in a state where the inner diameter W3 of the packing part IC is enlarged. Therefore, the insertion force of the light emitting body 4 into the packing part IC can be reduced, and the insertion work can be carried out easily.

FIGS. 7(al) and (b) show a third embodiment of the porous sheet packing 1 according to the present invention. In this embodiment, burrs 12 generated when the bottom shape of the porous sheet packing 1 are
This is related to the processing of

That is, in the porous sheet pankin 1 according to the present invention, burrs 12 as shown in FIG. Intervening in Figure 8 (see bl and (C1),
A gap S is created between the light emitting body 4 and the outer periphery, which impedes the adhesion of the packing portion 1c and causes a decrease in waterproof performance. In this embodiment, this burr 12 is arranged to occur outside the part of the packing part IC that is in close contact with the light emitting body 4, and inside the burr 12 there is a linear or circular shape of a predetermined length. If the waterproof part 1d is shaped like an arc and the light emitter 4 is inserted into the packing part IC, even if the above-mentioned rib 12 is interposed between the outer periphery of the light emitter 4, the stiffness 12 will prevent the waterproof part 1 from the light emitter 4. 1d, the adhesion of the waterproof portion [d] to the light emitting body 4 is not inhibited, and therefore a predetermined waterproof effect can be achieved.

〔Effect of the invention〕

Since the porous sheet packing according to the present invention is configured as described above, it improves the workability of attaching the porous sheet packing to a display device comprising a large number of light emitting bodies such as light emitting diodes, and also improves the adhesion to the outer periphery of the light emitting bodies. Also, it is possible to provide a porous sheet packing for a display device that has excellent waterproof properties.

[Brief explanation of drawings]

Fig. 1 is a front view of a display device having a waterproof structure using a porous seal I/packing according to the present invention, Fig. 2 is a rear view, Fig. 3 is a plan view, and Fig. 4 is the same as that shown in Fig. 1. A cross-sectional view taken along the line A-A, FIG. 5 is an enlarged cross-sectional view of essential parts showing the first embodiment of the porous seam I/packing, and FIGS. 6(a) and fbl show the second embodiment of the porous seam 1 to packing. (al is an enlarged sectional view of the main part, fbl is also an enlarged explanatory view, Fig. 7fa) and (bl is a third embodiment regarding the porous sheet packing, (a) is an enlarged cross-sectional view of the main part, (b) is also an enlarged explanatory view, FIG. fbl is also an explanatory drawing, fcl is an enlarged view of the C section in the fbl diagram, (d) is a plan view, FIG. 9 is a vertical cross-sectional view showing a conventional display device, and FIG. 10 (a)
1 to (C1 show the first structure of the conventional porous gas packing, (81 is an enlarged sectional view of the main part showing the state before being attached to the light emitting body, and fbl is the same after being attached to the light emitting body. An enlarged sectional view of the main part showing the state, (C1 is also an explanatory diagram, 1st) Figure (Al and (BL are the same) (The second structure regarding the conventional porous sheet packing, fat is the luminous body) Figure 12 (al and fb) is an enlarged sectional view of the main part showing the state before attachment to the light emitting body, (bl is also an enlarged sectional view of the main part showing the state after attachment to the light emitting body, This shows the third structure, (al is an enlarged sectional view of the main part showing the state before being attached to the light emitting body, and fbl is an enlarged sectional view of the main part showing the state after being attached to the light emitting body. ...Porous sheet packing 1a...Connection membrane 1b.
...Through hole 1c...Packing part 2...
・Housing 3... Surface plate 4... Luminous body 5... Cutting board patent applicant Koito Kogyo Co., Ltd.

Claims (5)

[Claims] (1) A sheet packing that is in close contact with the outer circumferential surface of a large number of light emitters arranged in a matrix to waterproof the inside and outside of each light emitter attachment part, the sheet packing comprising a connecting membrane and an opening on the connecting membrane surface. The connecting membrane is formed to be thinner than the cross-sectional diameter of the packing portion, and the connecting membrane is formed to be thinner than the cross-sectional diameter of the packing portion. , a porous packing for a display device, which is provided corresponding to the arrangement portion of each of the light emitting bodies, and wherein the packing portion is integrally connected in a planar manner by the connection film. (2) The porous sheet packing for a display device according to claim 1, wherein the packing portion is formed in the shape of an O-ring. (3) The porous sheet packing for a display device according to claim 1, wherein the packing portion is formed to have an elliptical, oval, or polygonal cross-sectional shape. (4) Claim 1, 2, or 3, wherein each of the packing parts is formed so as to protrude toward the surface of the connecting membrane, and its center of rotation is located outside the center line of the connecting membrane. The porous sheet packing for the display device described above. (5) A display device characterized in that the porous sheet packing constitutes a waterproof structure for the inside of the casing in which the plurality of light emitters are mounted.