JP2005283782A - Sign board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signboard realizing space saving by increasing diffusion efficiency of light from a fluorescent tube, thereby eliminating light emission spots. <P>SOLUTION: The signboard comprises: an external box 1 which has, on its front side, windows 6a and 6b where a display body 14 can be displayed; a substrate 5 which is fitted inside the external box 1 and has, on its front side, a light-reflecting surface 5a matching the windows 6a and 6b; one or more fluorescent tubes 2 which are fitted on the front side of the light-reflecting surface 5a; and a light diffusion member 3 which is interposed between the fluorescent tube 2 and windows 6a and 6b, wherein the light-diffusing member 3 is fitted to the side of the light-reflecting surface 5a and spaced away from the fluorescent tube 2, while surrounding the front side and right and left side faces of the fluorescent tube 2 and also formed in shape of a semi circular arc along the peripheral surface of the fluorescent tube 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a signboard that displays a picture or a photograph by light emission of a fluorescent tube.

This type of signboard, generally called an electric signboard, includes a light reflector on the inner side of the outer box, and one or more fluorescent tubes are arranged on the light reflector, and further on the front of the outer box. The mainstream was a display with a window that accommodated pictures and photos, and the pictures and photos were displayed in a backlight manner.
JP 11-161209 A

  In order to eliminate the inconvenience of light emission spots in this type of signboard, it is common to put a light transmission adjusting plate or light diffusing plate on the window part of the outer box. In order to exhibit a sufficient effect, it is necessary to widen the distance between the window and the fluorescent tube, which increases the thickness of the outer box and hinders space saving when installing the signboard.

  The present invention has been invented in view of the above problems, and it is an object of the present invention to provide a signboard that can increase the efficiency of light diffusion from a fluorescent tube to eliminate light emission spots, and can achieve a significant space saving.

  The invention according to claim 1 of the present invention has an outer box provided with a window on the front side on which a display object can be posted, and a light reflecting surface attached to the outer box and coincident with the window on the front side. It comprises a substrate, one or more fluorescent tubes attached to the front side of the light reflecting surface, and a light diffusing member interposed between the fluorescent tube and the window, and the light diffusing member is a front surface of the fluorescent tube. It is characterized in that it is attached to the light reflecting surface side with a space from the fluorescent tube so as to surround the three sides of the side and the left and right side surfaces, and is formed so as to form a semicircular arc along the peripheral surface of the fluorescent tube To do.

  Here, the front side is based on the front side of the window side of the outer box. The display object means a picture or a photograph drawn on paper or a resin plate having a certain light transmittance. The light diffusing member only needs to be able to illuminate the light from the fluorescent tube uniformly toward the window. Specifically, the cover has a dot pattern printed on an acrylic plate or glass plate, or is punched on the peripheral surface. Examples include a processed acrylic plate bent into a semicircular arc shape. Further, it is desirable that the substrate has a portion for attaching the fluorescent tube and the light diffusing member, and that the surface on the side where the fluorescent tube is attached has a shape that enhances the reflection efficiency of the light reflecting surface. The light reflecting surface may be any surface as long as it has high reflection efficiency when irradiated with light, and specifically includes a white surface or a mirror surface.

  If formed in this way, the light diffusing member covers the three sides from the front side of the fluorescent tube to the left and right side surfaces at intervals, so that a wide range of light on the peripheral surface of the fluorescent tube is emitted when the fluorescent tube emits light. The light is diffused toward the light diffusing member, and accordingly, the light is also efficiently diffused over a wide range, so that light can be emitted uniformly over the window and the entire display object.

  According to the second aspect of the present invention, the light diffusing member is formed to be detachable from the substrate via the mounting member, so that the light diffusing member, the fluorescent tube can be replaced, or other signboard components can be maintained. Then, the work can be performed by removing the light diffusing member. When the work is completed, the light diffusing member can be attached to the substrate again.

  The member that allows the light diffusing member to be detachable from the substrate is not particularly limited because it may be a clip, a mounting bracket, or the like that is generally used for detaching the member. It is desirable that the size, shape, and number of installation locations be such.

  According to the invention described in claim 1 of the present invention, it is possible to efficiently diffuse the light from the fluorescent tube to decorate the display object beautifully, and to increase the light diffusion efficiency, so that the signboard is more than conventional. Can be dramatically reduced in thickness.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the light diffusing member, the fluorescent tube, various signboard components, etc. can be replaced and maintained more easily. It becomes.

  Next, an embodiment of the signboard of the present invention will be described below.

  As shown in FIGS. 1 to 3, the present signboard is fixed to the outer box 1 having a front door and an open / close door 8 having windows 6 a and 6 b on which display objects 14 can be posted, and fixed to the side of the outer box 1. A discharge controller 9 composed of an inverter, a ballast, a glow lamp, etc., a substrate 5 attached to the back position in the outer box 1 and having a light reflecting surface 5a on the front side, and a front side of the substrate 5 A fluorescent tube 2 with a socket 10 installed in the center and a light diffusing cover 3 having a semicircular arc shape arranged so as to surround the front and left and right side surfaces of the fluorescent tube 2 are provided.

  First, the outer box 1 has a rectangular shape formed entirely of metal, and includes an opening / closing door 8 with windows 6a and 6b on the front side, and further for the opening / closing door 8 along the inner edge side of the outer box 1. The door stopper piece 11 is fixed, and when the door 8 is closed, the door 8 abuts against the door stopper piece 11 to close the inside of the outer box 1. The windows 6a and 6b are formed by superimposing a transparent glass plate 6a and a milky white acrylic plate 6b. Further, a gap S is formed between the glass plate 6a and the acrylic plate 6b so as to sandwich a display object 14 such as a picture, a photograph, or a poster.

  Next, the fluorescent tube 2 and the discharge control unit 9 are generally those which are generalized with this kind of signboard. Specifically, a unit in which an inverter, a ballast, and a glow lamp are arranged on a substrate. The discharge control unit 9 is structured and fixed to the side part in the outer box 1 with screws. Further, the fluorescent tubes 2 are respectively provided with sockets 10, and by attaching the fluorescent tubes 2 to the respective sockets 10, a switch (not shown) connected to a power source provided outside the outer box 1 is activated. If it is, it becomes a mechanism to emit light.

  The substrate 5 is inclined toward the fluorescent tube 2 on the left and right of the place where the fluorescent tube 2 is installed, and a light reflecting surface 5a forming a white surface is formed on the front side of the substrate 5. The light reflecting surface 5a and the inclined portions of the substrate 5 allow the light from the fluorescent tube 2 to efficiently pass through the windows 6a. Light is emitted toward the 6b side. Further, the shape of the substrate 5 can be freely changed depending on the number of the fluorescent tubes 2. For example, when two fluorescent tubes 2 are arranged in the outer box 1 as shown in FIG. It can also be provided on the left and right for every two arrays.

From here, the structure of the light diffusion cover 3 which is the main part of the signboard will be described below.
The light diffusing cover 3 is obtained by bending an acrylic plate having a length corresponding to the length of the fluorescent tube 2 and exhibiting a transparent color so that the cross-sectional shape is a semicircular arc. Further, a film having a dot pattern printed on the entire surface is pasted on the surface side of the light diffusion cover 3, and the thickness of the film is in the range of 100 μm to 200 μm. On the other hand, sandwiching pieces 4 and 4 are respectively provided at the left and right side positions of the place where the fluorescent tube 2 is installed on the substrate 5, and further, the sandwiching pieces 4 and 4 are spaced on the front side of the light reflecting surface 5a. They are arranged at four locations with a gap (see FIG. 1). As shown in FIG. 5, the light diffusion cover 3 is attached to the substrate 5 by inserting both end portions of the light diffusion cover 3 into the holding pieces 4 and 4. Along the peripheral surface, the three sides of the front side and the left and right side surfaces are surrounded at intervals.

  Furthermore, as shown in FIG. 6, light from the fluorescent tube 2 to which the light diffusion cover 3 having the above structure is attached is diffused in an irregular state on all three sides of the front side and the side surface of the light diffusion cover 3, and further diffused. The light is irradiated to the light reflecting surface 5a on the back side of the fluorescent tube 2 and then reflected to the windows 6a and 6b, so that the light from the fluorescent tube 2 has no emission spots toward the entire windows 6a and 6b. Irradiation is performed in a uniform state.

FIG. 7 shows another embodiment of the signboard according to the present invention. In this signboard, each component such as the fluorescent tube 2, the light reflection surface 5 a, the discharge controller 9, etc. is arranged on a single substrate 5. Further, the light diffusion cover 3 is attached to the front side of the substrate 5 via the sandwiching pieces 4. In this case, since all the components including the light diffusion cover 3 can be taken out from the outer box 1, the signboard can be maintained more easily.
Reference numeral 12 denotes a spacer for mounting the substrate 5.

It is the front view which notched a part of signboard by this invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. It is a BB line longitudinal cross-sectional view of FIG. It is a cross-sectional view which shows other embodiment of the signboard by this invention. It is explanatory drawing which planarly viewed the light-diffusion member of this invention which expands and shows C in FIG. Similarly, it is explanatory drawing which planarly viewed the light-diffusion member of this invention. It is a longitudinal cross-sectional view which shows other embodiment of the signboard of this invention.

Explanation of symbols

1 Outer box 2 Fluorescent tube 3 Light diffusion cover (light diffusion member)
4 Clamping piece (mounting member)
5 Substrate 5a Light reflecting surface 6a Glass plate (window)
6b Acrylic board (window)
14 Display items

Claims (2)

An outer box (1) provided with a window (6a, 6b) on which a display object (14) can be posted on the front side, and a light reflection that is attached to the outer box (1) and coincides with the window (6a, 6b) A substrate (5) having a surface (5a) on the front side, one or more fluorescent tubes (2) attached to the front side of the light reflecting surface (5a), the fluorescent tube (2) and a window (6a) , 6b) and a light diffusing member (3) interposed therebetween,
The light diffusing member (3) is attached to the light reflecting surface (5a) side with a space from the fluorescent tube (2) so as to surround three sides of the front side and the left and right side surfaces of the fluorescent tube (2). A signboard characterized by forming a semicircular arc along the peripheral surface of the tube (2). The signboard according to claim 1, wherein the light diffusing member (3) is detachably formed from the substrate (5) via an attachment member (4).

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