JPH0428015Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a display device using a pointer, and particularly to a pointer display device suitable for in-vehicle instruments.

[Problems to be solved by conventional techniques and ideas]

The present applicant has previously developed a mechanical display device that uses a pointer, but it has a flat display surface that improves visibility, and also has a third type that is innovative in terms of design.
We have proposed a pointer display device as shown in FIGS.

The illustrated device is an in-vehicle speedometer,
A driving section 1 of the meter is mounted on a substrate 2, and a pointer 4 is fixed to the tip of a pointer shaft 3 provided at the center of the driving section 1. A scale plate 5 (dial plate) made of a transparent material is arranged close to the front side of the pointer 4. A light guide plate 8 is disposed on the back side of the pointer 4 to illuminate the pointer 4 whose surface is coated with yellow-orange paint 4a. It is fixed by. Note that the end of the light guide plate 8 is connected to the light source 11 provided on the substrate 2.
is facing.

As shown in FIG. 3, the scale plate 5 has arc-shaped transparent portions 5a, and the transparent portions 5a are distributed and arranged in the circumferential direction with a predetermined width d by radial dividing lines 5b. ing. The distance between the marking lines 5b that function as part of the scale 6, that is, the width d, is determined by the vehicle speed of 20 km/h.
It corresponds to the scale 6 for each h. On the scale plate 5, the parts other than the dividing line 5b of the transparent part 5a, the scale 6, and the number 7 are printed in black from the back side, and this printed layer 5
A transparent portion 5a, a scale 6, and a numeral 7 are formed by the portion without c. And scale 6 and number 7
A white printing layer 5d is further applied on top of the printing layer 5c, and the scale 6 and the number 7 are visible in white on a black background.

In the above display device, when the pointer 4 rotates,
An intermediate portion of the pointer 4 excluding the tip and base is visible through the see-through portion 5a of the scale plate 5. The width d of the transparent part 5a is formed wider than the width of the pointer 4;
A is divided into sections of 50 km/h by dividing lines 5b, and only the middle part of the pointer 4 is visible through the see-through part 5a, so the display is segmental.

In the above-mentioned speedometer, since the scale plate 5 made of a transparent material is provided on the front side of the pointer 4, the driver looking at the display will look at the surface of the scale plate 5. At least the surface of the transparent portion 5a of the scale plate 5 must be a surface without surface treatment so that the pointer 4 can be seen.

If such a meter is installed at the rear of the hood 20 behind the front glass 21 in a state that is approximately upright to the driver, as shown in FIG. The user sees his or her own image reflected on the surface of the scale plate 5 through the glass 21, resulting in a problem that the visibility of the display is impaired. Note that 23 indicates the range of the eye point 23a that changes depending on individual differences between drivers.

The above-mentioned problem can be solved by arranging the scale plate 5 of the meter at an angle with respect to the driver's line of sight and reflecting the image reflected on the scale plate 5 in the direction of the hood 20, as shown in FIG. This can be solved by making it invisible to the driver. However, in such a situation, if the center of rotation of the pointer 4 and the center of the arc on which the scale 6 is attached are concentric, a discrepancy will occur between the apparent indicated value and the true indicated value, causing the display Another problem arises in that the data cannot be read accurately.

Therefore, the present invention has an arc-shaped transparent section on the front side of a pointer attached to a rotationally driven pointer shaft that allows the middle part of the pointer to be seen through, and a scale attached on an arc along the transparent section. In a pointer display device in which a scale plate with It is an object of the present invention to provide a pointer display device in which the display is corrected so that the display can be read accurately.

[Means and actions for solving problems]

In order to solve the above problems, the pointer display device according to the present invention provides an apparent indication by arranging the center of the arc on which the scale is attached to be located on the line connecting the eye point and the rotation center of the pointer. The value matches the true indicated value so that the display can be read accurately.

〔Example〕

Hereinafter, embodiments of the pointer display device according to the present invention will be described based on the drawings.

FIG. 1 is a side sectional view showing an embodiment of the device according to the present invention, and FIG. 2 is a plan view of the same device. In the figure, the pointer 4 is a drive unit 1 fixed inside the case 10.
It consists of a base portion 4a fixed to the tip of a pointer shaft 3 that is rotationally driven by a pointer shaft 3, and an indicator portion 4b extending in one direction perpendicular to the base portion 4a, and the entire body is integrally molded from a transparent resin material. The pointer 4 rotates around the pointer shaft 3 due to the rotation of the pointer shaft 3.
That is, the center of rotation of the pointer 4 is located at the center point a of the base 4a fixed to the pointer shaft 3.

The scale plate 5 is fixed to the opening of the case 10, and its transparent part 5a is defined by two arcs c and d centered on one point b, and an arc along the outer arc d. A predetermined scale 6 is placed radially on a line passing through point b. Separator lines 5b are attached to the transparent part 5a at equal intervals at a vehicle speed of 20 km/h.
, similarly to the scale 6, are provided radially on a line passing through point b. That is, point b on the scale plate 5 is connected to the circular arcs c and d forming the transparent part 5a and the scale plate 6.
It is the center of the arc attached.

The scale plate 5 is fixed to the opening of the case 10 by positioning the point b on the scale plate 5 on the line connecting the rotation center a of the pointer 4 and the eye point 23a, and from the direction perpendicular to the surface of the scale plate 5. This is done so that an appropriate offset x occurs when viewed.

As described above, by positioning the point b on the scale plate 5, which is the center of the arc on which the scale 6 is attached, on the line connecting the rotation center a of the pointer 4 and the eye point 23a, the pointer 4 The actual indicated value matches the apparent indicated value, making it possible to read the display accurately.

〔effect〕

As explained above, according to the present invention, on the front side of the pointer attached to the rotatably driven pointer shaft, there is an arc-shaped transparent part that allows the middle part of the pointer to be seen through, and an arc-like part along the transparent part. In a pointer display device in which a scale plate having a scale marked with a scale is disposed, and the scale plate is arranged at an angle with respect to a line connecting an eye point and a center of rotation of the pointer, a circular arc on which the scale is attached. Since the center of the display is located on the line, the apparent indicated value and the true indicated value match, making it possible to read the display accurately.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the pointer display device according to the present invention, FIG. 2 is a view taken along arrow A of the device shown in FIG. 1, and FIGS. 3 and 4 are plan views showing conventional devices, respectively. and a side sectional view, FIG. 5 is an explanatory diagram showing an example of the arrangement of the devices in FIGS. 3 and 4, and FIG. 6 is an explanatory diagram showing an example of the arrangement of the devices in FIGS. 3 and 4. 3...Pointer shaft, 4...Pointer, 5...Scale plate, 5
a... Transparent part, 6... Scale, 23a... Eye point, a... Center of rotation, b... Center of circular arc.

Claims (1)

[Claims for Utility Model Registration] On the front side of a pointer attached to a rotatably driven pointer shaft, an arcuate transparent part that allows the middle part of the pointer to be seen through, and an arc along the transparent part. In a pointer display device in which a scale plate having a scale is disposed, and the scale plate is arranged at an angle with respect to a line connecting an eye point and a center of rotation of the pointer, the center of the arc on which the scale is attached is A pointer display device characterized in that it is positioned on the line.