JP2520031B2 - Perforated sheet packing for display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a display device including a large number of light emitting elements (hereinafter referred to as “light emitters”) such as light emitting diodes in which light sources are arranged in a matrix and small light bulbs. The present invention relates to a waterproof structure, and more particularly to a porous sheet packing for a display device for waterproofing a light emitter mounting portion with respect to a surface plate of a housing.

[Conventional technology]

2. Description of the Related Art Conventionally, as a light source of a display device configured on an information display panel that displays various kinds of information such as road information, a light source in which a large number of light emitters are arranged in a matrix is used.
Most of the display devices of this type are formed by uniting a predetermined number of light-emitting bodies, and a plurality of unitized display devices are arranged vertically and horizontally to form a single information display panel. 9 and 10 (a) to 10 (c) show a light emitter 51 of the display device 50.
A light emitting diode is used as a unit, and a large number of the light emitting diodes are arranged in a matrix in a casing 52 formed in a rectangular frame to form a unit, and each light emitting body 51 is fixed in parallel on a substrate 53. The light emitting portion 51a of each light emitting body 51 is mounted inside the housing 52, and is projected and held in front of the housing 52 through through holes 55 that are formed through a matrix on a surface plate 54 of the housing 52. . The through holes 55 have an inner diameter W1 such that the light emitting body 51 can be inserted from the back side thereof.
Regarding the waterproof structure for the mounting portion of the light emitting body 51 against, a large number of through holes 56 corresponding to the arrangement of the light emitting body 51 and having an inner diameter W3 (W2> W3) slightly smaller than the outer diameter W2 of each light emitting body 51. The synthetic resin or other elastic synthetic resin made porous sheet packing 57 is covered on the surface plate 54 so as to closely adhere to the outer periphery of the light-emitting body 51, and the surface of the surface plate 54 is covered to cover the surface plate 54 side. Or a hole 58 having a substantially U-shaped cross section as shown in FIG. 11 is formed. The sheet packing 57 is fitted into the through hole 55 from the back surface side of the surface plate 54, and each light emitting body 51 is projected and attached to the front side of the surface plate 54 through the hole 58 of the perforated sheet packing 57. A waterproof structure is formed on the 54 side, and as shown in FIGS. 12 (a) and 12 (b), it is transparently provided on the surface plate 54 of the housing 52. The through-hole
55 is covered with a perforated sheet packing 57 having a through hole 56 having an inner diameter W3 of about the same as the inner diameter W1 of 55, and a pressing plate 59 is further covered from above, and the porous sheet packing is provided between the pressing plate 59 and the surface plate 54. For example, a method of compressing 57 to deform the inner edge cross-sectional shape of the through hole 56 of the perforated sheet packing 57 so as to be pressed against the outer periphery of each light-emitting body 51 to have a waterproof function is used.

[Problems to be Solved by the Invention]

However, in the above first waterproof structure, the inner diameter W3 of the through hole 56 formed in the surface of the porous sheet packing 57 has the light emitting body 51.
Is smaller than the outer diameter W2 of the, and the light emitting body 51 is inserted into the through hole 56 to expand the through hole 56 to the outer diameter dimension of the light emitting body 51.
Since the waterproof effect is obtained in an interference fit state due to elastic deformation of the through hole 56 portion of the perforated sheet packing 57,
When the perforated sheet packing 57 is mounted on the surface plate 54 of the housing 52 while inserting the light emitting body 51 into the through hole 56, the perforated sheet packing 57 does not have a portion for absorbing the elastic deformation, A large insertion force is required, and as shown in FIG. 10 (c), the center C1 of the light emitter 51 and the center of the through hole 56
If C2 is displaced, there is a problem that a clearance S is created in the mounting portion of the light emitting body 51 and the waterproof effect is reduced, and the second waterproof structure described above has a U-shaped cross section. In addition to not only the moldability of the perforated sheet packing 57 itself deteriorates with respect to the formed hole portion 58, the interval W4 between the light emitters 51 and the light emitter 51
If the difference in the outer diameter W2 of the surface plate 54 is small enough to secure the strength of the surface plate 54 itself, it is necessary to reduce the thickness of the porous sheet packing 57 by that amount, and the strength is reduced. At the same time, it causes a problem that mounting workability deteriorates.
Not only a very large compression force is required to elastically deform the porous sheet packing 57 between the 59 and the surface plate 54 until a sufficient waterproof effect is exerted, but also the compression force is uniformly applied to the porous sheet packing 57 and the presser 59. Therefore, the number of man-hours for tightening screws and the like is increased, and the structure for producing such a compressive force is extremely difficult.

The present invention was created in view of the above problems,
A display with excellent waterproofness and mounting workability for many light emitter mounting parts arranged on the casing surface plate without constructing an excessive insertion force or special compression structure for the porous sheet packing. An object of the present invention is to provide a porous sheet packing for a device and a display device having the porous sheet packing.

[Means for solving 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 packing that is in close contact with the outer peripheral surface of a large number of luminous bodies arranged in a matrix and waterproofs the inside and outside of each luminous body mounting portion. The sheet packing includes a connecting film, a large number of through holes formed on the surface of the connecting film, and a large number of ring-shaped packing portions formed on the inner edge of the through holes.
The film thickness of the connection film is formed thinner than the cross-sectional diameter of the packing portion, the plurality of through holes are opened corresponding to the arrangement portion of each of the light emitting body, the packing portion, The inner diameter is formed smaller than the outer diameter of the light emitting body, and the gist is that it is integrally connected in a planar shape by the connecting film.

The packing portion can be formed on the O-ring or in an appropriate shape having an oval shape, an elliptical shape, a polygonal shape, or other shape having a close contact portion with respect to the light-emitting body in cross section. It is also possible to project it to the surface side of and to form its rotation center outside the center line of the coupling film.

[Action]

Thus, according to the porous sheet packing having the above structure, by inserting a large number of light emitters into the packing part and covering the surface plate of the housing, the packing part is pressed against the outer circumference of the light emitter and the contact is made. The part can be sealed and the connecting film can seal and waterproof the surface plate side. Even if the packing part elastically deforms due to the outer diameter of the light emitter during this mounting, the elastic deformation is distorted to the side of the connecting film that connects the packing parts, and the position of the packing part is moved to adhere to the outer circumference of the light emitter. To do.

Moreover, since the thickness of the connecting film is smaller than the cross-sectional diameter of the packing part, even when inserting the light emitter into each packing part, it is easy to apply a small insertion pressure to the case surface plate. Can be attached to.

〔Example〕

Preferred embodiments of the porous sheet packing for a display device according to the present invention will be described below with reference to the drawings.

1 to 4 show a display device in which a surface plate 3 of a housing 2 is waterproofed by a porous sheet packing 1 for a display device according to the present invention. In the present embodiment, a large number of light-emitting elements 4 arranged in a matrix are formed by using light-emitting diodes, and a plurality of light-emitting elements 4 are arranged in parallel on a plurality of substrates 5 and each light-emitting portion 4a. Are fixed toward the end of the substrate 5, and each substrate 5 is inserted from the rear into the casing 2 formed in the shape of a rectangular frame, and each luminous body 4 is attached to the surface plate 3 of the casing 2. A large number of through holes 1b are formed on the surface plate 3 by inserting the light emitting portions 4a into the through holes 3a that are provided in a transparent manner, and forming a matrix arrangement on the surface plate 3 corresponding to the arrangement of the light emitting bodies 4. The opened porous sheet packing 1 is covered, at the same time, the light-emitting body 4 is inserted into each through hole 1b of the porous sheet packing 1, and a cover plate 6 is attached to the upper surface thereof.
Like the porous sheet packing 1, the cover plate 6 is formed with a large number of through holes 6a corresponding to the arrangement of the light emitters 4 and is affected by heat when the light emitters 4 are turned on or by sunlight or the like. In this case, in order to dissipate the generated heat and the like to the outside of the housing 2, it is preferable to use an aluminum plate or other metal plate. Further, on the front surface of each light-emitting body 4, in order to prevent occurrence of a pseudo lighting phenomenon due to external light and a light interference phenomenon between the light-emitting bodies, a light-shielding plate having an opening in the irradiation direction of each light-emitting body 4 is formed. It is equipped with 7.

On the rear part of the housing 2, the boards 5 are separately provided respectively.
A rear frame 8 for supporting and fixing therein is attached, and a step portion 5a formed on a rear side edge of each substrate 5 is pressed from the rear side thereof to prevent each substrate 5 from coming off. . Further, the rear frame 8 has hooks 9 formed on its side edges,
When the display device according to the present invention is mounted on the machine frame A or the like of the information display panel, it can be freely fitted and fixed in the hook holes B of the machine frame A. Reference numeral 10 denotes a mother board which is attached to the rear end of each substrate 5 and which substantially covers the rear of the housing 2, and a connector 11 for connecting various signal lines or wirings is attached to the surface thereof.

FIG. 5 shows a first embodiment of the porous sheet packing 1 according to the present invention. The porous sheet packing 1 according to the present embodiment is in close contact with the outer peripheral surface of a large number of luminous bodies 4 arranged in a matrix on the surface plate 3 of the housing 2 to waterproof the inside and outside of each luminous body 4 mounting portion. The porous sheet packing 1 is a connecting film made of synthetic rubber or other elastic synthetic resin material having substantially the same size as the front opening of the housing 2.
A large number of through holes 1b corresponding to the arrangement of the light emitting bodies 4 are formed on the surface 1a, and the inner edge of each through hole 1b is integrally molded as an O-ring packing part 1c. Thickness T1
Is formed to be thinner than the cross-sectional diameter T2 of the packing portion 1c (T1 <T2), and ribs (not shown) are formed on the outer peripheral portion to waterproof the inner peripheral edge portion of the housing 2 as appropriate. The inner diameter W3 of the packing portion 1c is formed to be slightly smaller than the outer diameter W2 of the light emitting body 4 (W3 <W2), and the light emitting body 4 is formed in the packing portion 1c.
With the inner edge thereof closely contacted with the outer periphery of the light-emitting body 4 in a state of being inserted, a predetermined contact pressure is generated, the contact portion is completely waterproofed, and an inner diameter W3 generated by inserting the light-emitting body 4 into the packing portion 1c. It is configured such that the elastic deformation such as the expansion and the movement of the center C2 position is absorbed by the coupling film 1a portion. Further, the porous sheet packing 1 according to the present invention is a connecting film thereof.
The perforated sheet packing 1 according to the present embodiment is mounted on the surface plate 3 of the housing 2 without forming any holes other than the through holes 1b constituting the packing 1c on the film surface of 1a. In this state, the inside of the housing is completely sealed by the connecting film 1a, so that rainwater and the like are prevented from entering the housing 2. As described above, since the film thickness T1 of the connecting film 1a portion is formed thinner than the cross-sectional diameter T2 of the packing portion 1c (T1 <T2), elastic deformation and movement of the center C2 generated in the packing portion 1c can be easily absorbed by strain. Therefore, even if the arrangement positions of the luminous bodies 4 in the matrix arrangement are not necessarily aligned vertically and horizontally, the mountability and workability of the porous sheet packing 1 on the luminous bodies 4 are improved. be able to.

The shape of the packing portion 1c formed on the inner edge of the through hole 1b is
The shape is not necessarily limited to the above O-ring shape,
The cross-sectional shape may be an elliptical shape, an oval shape, or a polygonal shape, and the design can be freely changed as long as it is in close contact with the outer periphery of the light-emitting body 4 and exerts a waterproofing effect on the portion. Is natural.

FIGS. 6 (a) and 6 (b) show a second embodiment of the porous sheet packing 1 according to the present invention, and a part different from the first embodiment will be described.
Each packing part 1c is placed on the surface side of the coupling film 1a so that the cross-section rotation center C3 of 1c is located in front of the film center line C4 of the coupling film 1a or the film center line C4, that is, the insertion direction side of the light emitting body 4. It is formed so as to project (see FIG. (B)).

When the packing portion 1c is formed so as to project to the surface side of the coupling film 1a in this manner, when the light emitting body 4 is inserted into the packing portion 1c, the packing portion 1c causes a frictional force in the outer peripheral portion of the light emitting body 4 toward the insertion direction. With the light source 4 rotated about the X part in the figure (in the direction of the arrow Y), and with the inner diameter W3 of the packing part 1c enlarged.
Insert. Therefore, the light emitter 4 for the packing portion 1c
It is possible to reduce the insertion force of and to easily perform the insertion work.

7 (a) and 7 (b) show a third embodiment of the porous sheet packing 1 according to the present invention. In this embodiment, burrs 12 generated when the porous sheet packing 1 is molded.
Is related to the processing of.

That is, in the porous sheet packing 1 according to the present invention, a burr 12 as shown in FIG. 8 (a) is formed inside the packing portion 1c at the time of molding, which is caused when the light emitting body 4 is inserted.
Between the outer periphery of the light emitting body 4 (see FIGS. 8B and 8C), and a gap S is formed between the outer periphery of the light emitting body 4 and the packing portion.
This may impair the adhesion of 1c and cause a decrease in waterproofness. In this embodiment, the burr 12 is formed outside the contact portion of the packing portion 1c with respect to the light emitting body 4, and the inside of the burr 12 has a linear shape or an arc shape of a predetermined length. When the waterproof portion 1d is formed and the light emitting body 4 is inserted into the packing portion 1c, even if the burr 12 is interposed between the outer circumferences of the light emitting body 4, the burr 12 is located above the waterproof portion 1d with respect to the light emitting body 4. It is possible to achieve a predetermined waterproof action without escaping and preventing the adhesion of the waterproof part 1d to the light-emitting body 4 from being hindered.

〔The invention's effect〕

Since the porous sheet packing according to the present invention is configured as described above, the mounting workability of the porous sheet packing with respect to the display device having a large number of light emitting diodes and other light emitting elements is improved, and the adhesion to the outer periphery of the light emitting element is improved. Also, it is possible to provide a porous sheet packing for a display device which is excellent in waterproofness.

[Brief description of drawings]

FIG. 1 is a front view of a display device having a waterproof structure formed by a porous sheet packing according to the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a plan view of the same, and FIG. 4 is a line AA of FIG. Sectional drawing, FIG. 5 is an enlarged sectional view of an essential part showing a first embodiment of a porous sheet packing, and FIGS. 6 (a) and 6 (b) are a second embodiment of a porous sheet packing. (A) is an enlarged sectional view of an essential part, (b) is an enlarged explanatory view of the same, FIGS. 7 (a) and 7 (b) show a third embodiment relating to a porous sheet packing, and (a) is an essential part. Partial enlarged cross-sectional view, (b) is also an enlarged explanatory view, FIGS. 8 (a) to (d) show molding burrs generated in the porous sheet packing, (a) is an enlarged cross-sectional view of the porous sheet packing, (B) is also an explanatory view, (c) is an enlarged view of portion c in (b), FIG. 9 (d) is a plan view, FIG. 9 is a longitudinal sectional view showing a conventional display device, and FIGS. 10 (a) to 10 (c) show a first structure relating to a conventional porous sheet packing. ) Is an enlarged cross-sectional view of an essential part showing a state before attachment to the light emitter, (b) is an enlarged cross-sectional view of an essential part showing a state after attachment to the light emitter, (c) is also an explanatory view, FIG. (A) and (b) show a second structure of a conventional porous sheet packing, (a) is an enlarged cross-sectional view of a main part showing a state before attachment to a light emitting body, (b) is also a light emitting body FIG. 12 (a) and FIG. 12 (b) show an enlarged cross-sectional view of an essential part showing a state after the mounting, and FIG. 12 (a) and FIG. 12 (b) show a third structure of the conventional porous sheet packing. An enlarged cross-sectional view of the main part showing the state, (b) is the same for the light emitter. FIG. 3 is an enlarged sectional view of an essential part showing a state after mounting. 1 ... Porous sheet packing, 1a ... Connecting film 1b ... Through hole, 1c ... Packing part 2 ... Housing, 3 ... Surface plate 4 ... Light emitter, 5 ... Substrate

Claims (5)

(57) [Claims] 1. A sheet packing for closely sealing the outer peripheral surface of a large number of luminous bodies arranged in a matrix to waterproof the inside and outside of each luminous body mounting portion, the sheet packing comprising a coupling film and a coupling film surface. And a plurality of ring-shaped packings formed on the inner edge of the through-holes. The thickness of the connecting film is smaller than the cross-sectional diameter of the packing. A large number of through-holes are opened corresponding to the arrangement portions of the respective luminous bodies, and the packing portion has an inner diameter smaller than the outer diameter of the luminous body, and is made planar by the connecting film. A porous sheet packing for a display device, characterized in that it is integrally connected to. 2. The porous sheet packing for a display device according to claim 1, wherein the packing part is formed in an O-ring shape. 3. The porous sheet packing for a display device according to claim 1, wherein the packing part is formed so that its cross-section has an elliptical shape, an oval shape, a polygonal shape, or the like. 4. The packing parts are formed so as to project to the front surface side of the connecting film, and the rotation centers thereof are located outside the center line of the connecting film.
2. A porous sheet packing for a display device according to 2 or 3. 5. A display device characterized in that the porous sheet packing constitutes a waterproof structure for the inside of a housing in which the large number of luminous bodies are mounted.