JP2002022499A - Indicator panel and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indicator panel and its manufacturing method in which a separate member is provided for part of an indicator panel main body simultaneously with drawing in the indicator panel main body formed by drawing a sheet made of resin. SOLUTION: In a scale plate 30c, a scale plate main body 31 is manufactured by drawing a sheet so as to have a ring part 31b in the direction of thickness and fastening the annular separate member 30b to the inclined inner circumferential surface (h) of the ring part 31b of the scale plate main body 31 simultaneously with the drawing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scale panel of an instrument and other various display panels and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as this type of display panel, there is a stepped dial as disclosed in Japanese Utility Model Laid-Open No. 60-159319. The stepped dial is provided with irregularities to improve the three-dimensional appearance and the decorative appearance.

[0003]

The above-mentioned stepped dial is merely a flat dial with a concave portion formed in the center. For this reason, it is still insufficient to improve the three-dimensional effect and the decorative effect.

In order to solve this problem, for example, it is conceivable to provide another member on the boundary wall between the outer peripheral portion of the stepped dial and the recess. However, when the stepped dial is formed by drawing a resin sheet, it is usually difficult to provide another member on the boundary wall of the stepped dial because the resin sheet is thin.

Therefore, in order to cope with the above, the present invention is to provide a display panel body formed by drawing a resin sheet with a separate member on a part of the display panel body simultaneously with the drawing. It is an object of the present invention to provide a display panel and a method of manufacturing the same.

[0006]

In order to solve the above-mentioned problems, a display panel according to the first aspect of the present invention comprises a display panel body (31) having a sheet (100) and a projection (31b) in a thickness direction. ) Or a drawing process having a concave portion (31a), and at the same time as the drawing process, another member (30b) is fixed to the surface of the convex portion or the concave portion of the display panel body.

[0007] With this, when the display panel body is drawn, another member is adhered to the surface of the concave or convex portion of the scale plate body of the sheet simultaneously with the drawing process, so that the separate member is securely attached to the display panel. And it can be easily provided. In addition, by providing a separate member on the display panel, the display panel can have a more three-dimensional effect and a more decorative effect, and as a result, the visibility of the display panel can be further improved.

In the method of manufacturing a display panel according to the second aspect of the present invention, the display panel main body (31) is provided with a sheet (10).
0), a drawing die (90) having a die surface (90a) having a shape opposite to that of the concave portion or the convex portion so as to have a convex portion (31b) or a concave portion (31a) in the thickness direction.
Before drawing in, the other part is temporarily fixed to the part of the mold surface of the mold corresponding to the bonding part of the other part to the display panel body, and then another member is turned toward the mold surface of the mold. Perform drawing through.

Accordingly, it is possible to provide a method of manufacturing a display panel capable of achieving the functions and effects of the first aspect of the present invention.

According to a third aspect of the present invention, in the second aspect, an adhesive layer (104) is formed in advance on a surface of the sheet on the mold surface side, and drawing is performed. It is characterized by the following.

As a result, the separate member is bonded to the portion of the sheet corresponding to the separate member by using the adhesive force of the adhesive layer. As a result, the separate member is more firmly fixed to the display panel body. Meanwhile, the operation and effect of the invention described in claim 2 can be achieved.

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments described later.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a passenger car instrument to which the present invention is applied, and this instrument is provided as a combination meter on an instrument panel provided in a passenger compartment of the passenger car. The instrument comprises a casing 10 and the casing 10
The front panel 20 has an outer peripheral portion 21
At the end opening end 41 of an annular dial plate 40 described later
Is mounted via.

The instrument has an instrument panel 30 and the above-mentioned facing plate 40.
Is formed integrally with the return plate 40 so as to be located at the bottom of the panel. Here, the instrument panel 30 is provided along the light guide plate 50 supported in the casing 10, and the dial plate 40 rises annularly upward from the outer peripheral portion of the instrument panel 30.

The instrument panel 30 includes an instrument panel main body 30a and separate ring-shaped resin plate-like members 30b. The instrument panel main body 30a is formed integrally with the return plate 40 by subjecting one sheet to deep drawing.

The instrument panel 30 is provided with four scales 30c to 30f.
f constitutes a speedometer, a tachometer, a fuel gauge, and a water temperature gauge together with the corresponding rotating inner machines 60 (only one rotating inner machine is shown in FIG. 2) and the respective hands 70. Here, as shown in FIGS. 1 and 2, the scale plate 30 c includes a scale plate body 31 (consisting of a portion of the instrument panel body 30 a corresponding to the scale plate body) and the separate member 3.
0b (a separate member 30b on the left side in FIG. 1). The graduation plate main body 31 is formed by integrally projecting the ring portion 31b to the front panel 20 side in a substantially U-shape along the outer peripheral portion of the flat central portion 31a. The left-hand separate member 30b is adhered along the inclined inner peripheral surface h (see FIG. 2) of the ring portion 31b of the dial body 31 on the central portion 31a side.

The scale plate 30d is also a scale plate body 3
1 and the right side separate member 30b are configured similarly to the scale plate 30c. In the present embodiment, the surface of the instrument panel main body 30a is printed in black except for the portions corresponding to the light-transmitting portions (the portions other than the scales and the characters) of each of the scale plates 30c to 30f.

The rotary inner unit 60 corresponding to the scale plate 30c
2 is disposed in the casing 10 as shown in FIG. 2, and the rotating inner unit 60 includes an inner unit main body 61 and a pointer shaft 62. The pointer shaft 62 is moved from the inner machine main body 61 to the wiring board 80, the light guide plate 50, and the scale plate 30.
3C, it extends through each through-hole so as to be rotatable, and supports the corresponding rotation base of the pointer 70 at its tip. The same applies to the remaining rotary inner unit 60.

The wiring board 80 is supported in the casing 10 along the end surface of each of the internal unit main bodies 61 on the light guide plate 50 side.
According to the example shown in FIG. 2, each light source 81 is provided on the wiring board 80 around the axis of the pointer shaft 62 corresponding to the scale 30c. Each of these light sources 81 emits light into the light guide plate 50 to the outer peripheral portion of the through hole portion by turning on. The light thus incident is transmitted by the light guide plate 50.
Under the reflection by the inner peripheral surface of the through-hole in the inverted octagonal cross section,
The light is emitted to the scale plate 30c. The remaining dial 3
Similarly, each light source is provided on the wiring board 80 around the axis of the pointer shaft of each rotating inner machine 60 corresponding to 0d to 30f.

In the embodiment configured as described above, a method for manufacturing the instrument panel 30 will be described. The return plate 40 is manufactured together with the instrument panel 30 by deep drawing. Here, a manufacturing method centering on the instrument panel 30 will be described.

First, in the manufacture of the instrument panel 30, a mold 90 for air pressure molding as shown in FIG. 3 is prepared. The mold 90 has a mold surface 90a. This mold surface 90a
Has a mold surface portion 91 having a cross section opposite to that of the scale plate 30c (see FIG. 2).
Is formed with an inclined inner peripheral surface 91a corresponding to the inner peripheral surface h of the ring portion 31b of the scale plate 30c. The mold surface 90a has a mold surface portion 92 having a cross-sectional shape opposite to that of the scale plate 30d. The mold surface portion 92 has an inner peripheral surface of the ring portion 31b of the scale plate 30d. An inclined inner peripheral surface 92a corresponding to (the inner peripheral surface h of the ring portion 31b of the scale 30c) is formed.

Further, a sheet 100 for integrally forming the instrument panel 30 with the return plate 40 is prepared. As shown in FIG. 3, the sheet 100 includes a resin sheet main body 101, both print coatings 102 and 103 printed on both sides of the sheet main body 101, and an adhesive layer 104 formed along the outer surface of the print coating 103. It is composed of

In this embodiment, the resin sheet body 101 is used.
For example, a transparent polycarbonate sheet having a thickness in the range of 0.3 mm to 1.0 mm, for example, 0.5 mm, is adopted from the viewpoint of appropriate rigidity and cost before deep drawing. Therefore, the thickness of the entire sheet 100 is also very thin. The resin sheet body 101 is not limited to the polycarbonate sheet as described above, and may be any of various resin sheets as long as the sheet thickness is within the above range.

In manufacturing the instrument panel 30 by drawing, the mold 90 is placed in a room for supplying compressed air. However, each separate member 30b is temporarily fixed to the mold surface 90a of the mold 90. Specifically, the separate member 30b for the scale plate 30c is temporarily fixed so as to be detachable along the inclined inner peripheral surface 91a of the mold surface portion 91, and the separate member 30b for the scale plate 30d is fixed inside the inclined surface of the mold surface portion 92. Temporarily fixed so as to be detachable along the peripheral surface 92a.

Thereafter, as shown in FIG.
4 so that the sheet 4 faces the mold surface 90a.
It is held directly above the mold surface 90a. In such a state,
A mold surface 90a is formed on the sheet 100 from the side of the printing coating 102.
When air is pumped to the side, this sheet 100
At 04, it is pressed against the mold surface 90a. Along with this, each portion of the sheet 100 corresponding to each of the graduation plates 30c and 30d corresponds to each of the mold surface portions 91 and 9
2 so as to be in close contact with the surface. At this time,
Each part of the sheet 100 corresponding to each separate member 30b is pressed so as to be in close contact with the respective separate member 30b.

In such a state, if a pressure is applied to the adhesive layer 104 at a temperature according to predetermined bonding conditions, the sheet 1
Reference numeral 00 denotes an adhesive layer 104 that uniformly adheres to the mold surface 90a with an appropriate adhesive force. At this time, the portion of the sheet 100 corresponding to each of the separate members 30b is uniformly bonded to the surface of each of the separate members 30b at the corresponding portion of the adhesive layer 104 with the adhesive force. Thereby, each separate member 30b
Each of the scale plates 30c and 30d is adhered to the inclined inner peripheral surface of the scale plate main body at the same time as the drawing process by the drawing process by air pressure molding.

After that, if the sheet 100 is peeled off from the mold surface 90a, the separate members 30b are only temporarily fixed as described above.
And is separated from the mold surface 90a. This allows
The instrument panel 30 has a cross-sectional configuration illustrated in FIG.
Along with the return plate 40, it is manufactured integrally by drawing by pressure forming.

As described above, when the separate members 30b are provided on the inclined inner peripheral surface of the ring portion (see reference numeral 31b in FIG. 2) of the scale plate main body of each of the scale plates 30c and 30d, the sheet 100 is previously provided. The adhesive layer 104 is provided, and the separate members 30b are temporarily fixed to the inclined inner peripheral surfaces 91a, 92a of the mold surface portions 91, 92 of the mold 90 so as to be detachable,
As described above, the sheet 100 was pressed by the air pressure forming and the drawing was performed. Accordingly, when the instrument panel 30 is integrally formed with the return plate 40 by drawing, the separate members 30b are simultaneously placed on the inner peripheral surface of the ring portion 31b of each of the graduation plates 30c and 30d in the sheet 100 at the same time as the drawing. Can be glued. Therefore, the instrument panel 3 having the above configuration
Thus, the manufacture of the scale plates 30c and 30d can be reliably and easily realized.

Further, as described above, each separate member 30b is connected to the inclined inner peripheral surface 91a of each mold surface portion 91, 92 of the mold 90,
Since the sheet 100 is pressure-formed after being temporarily fixed to the releasable portion 92a, there is no occurrence of displacement between the inner peripheral surface of the ring portion 31b of each of the scale plates 30c and 30d and the separate member 30b.

Further, as described above, the separate members 30b are bonded to the corresponding portions of the respective scale plates 30c and 30d, so that even if the sheet 100 is thin, good rigidity can be obtained.
c, 30d.

Further, by making each of the scale plates 30c and 30d as described above, each separate member 30b can be connected to the instrument panel 3
0 gives a more three-dimensional or decorative feeling, and as a result, the visibility of the instrument panel 30 can be further improved.

In practicing the present invention, the present invention may be applied to a single instrument such as a speedometer instead of a combination meter.

In practicing the present invention, an instrument used for automobiles such as buses, trucks and motorcycles or other vehicles, an instrument for general industrial equipment, or a general decorative display is not limited to an instrument for passenger cars. The present invention may be applied to a board. In this case, the shape of the separate member 30b is changed according to the uneven shape of the portion where the separate member 30b is adhered to the display panel body of the display panel.

In practicing the present invention, the instrument panel 30 may be manufactured by drawing, such as vacuum forming, without being limited to pressure forming.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 in FIG.

FIG. 3 is a view showing a step of pressure-forming the instrument panel.

[Explanation of symbols]

30: instrument panel, 30c to 30d: scale board. 60a to 60d: rotating inner machine.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroyuki Nagino 1-1-1 Showa-cho, Kariya-shi, Aichi F-term in DENSO Corporation (Reference) 3D044 BA01 BA12 BA21 BB01 BD02 5C096 AA11 AA27 BA01 CA02 CA04 CA12 CA16 CA28 CB01 CC06 CD02 EB10 EB14 FA11 FA17

Claims (3)

[Claims] The display panel body (31) is attached to a sheet (10).
0), the protrusion (31b) or the recess (3) in the thickness direction.
A display panel which is drawn so as to have 1a) and another member (30b) is fixed to the surface of the convex portion or the concave portion of the display panel main body at the same time as the drawing process. 2. The display panel body (31) is attached to a sheet (10).
0), a drawing die (90) having a die surface (90a) having a shape opposite to that of the concave portion or the convex portion so as to have a convex portion (31b) or a concave portion (31a) in the thickness direction.
Before drawing in the mold, the other part is temporarily fixed to a part of the mold surface of the mold corresponding to a bonding part of the other part to the display panel body, and then directed toward the mold surface of the mold. A method of manufacturing a display panel, wherein the drawing is performed via the separate member. 3. The display panel according to claim 2, wherein an adhesive layer (104) is previously formed on the surface of the sheet on the mold surface side, and the drawing is performed. Manufacturing method.