JPH04134019U - Light leakage prevention structure for instruments using aperture dials - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a light leakage prevention structure for an instrument using an aperture dial plate, which prevents light inside the instrument from leaking between the dial and endpaper. [Structure] The aperture dial plate 1 has a central portion 3 that is flat and concave toward the rear, and a peripheral portion 4 that is raised forward and has a substantially trapezoidal cross section. The trapezoidal peripheral portion 4 includes an inner wall 5 that rises steeply from the center of the dial 1, a horizontal upper side 6, and a substantially vertical outer wall 7.
and a horizontal end 8. On the other hand, the end portion of the endpaper 2 is formed to protrude and have a substantially U-shaped cross section. One of the U-shaped portions serves as an abutment wall 9 and is brought into contact with the upper side 6 of the peripheral edge, and the others serve as light shielding walls 10 that cover the outer wall 7 of the peripheral edge 4. When the endpaper 2 is attached to the front of the dial 1, the contact wall 9 contacts the entire circumference of the upper edge 6 of the dial 1, and
0 engages with the outer wall 7 of the peripheral edge 4 of the dial 1 over the entire circumference.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention consists of a dial manufactured by drawing and a dial that engages with the peripheral edge of the dial. In the display part of the instrument that uses an aperture dial consisting of a dial, light from inside This invention relates to a light leakage prevention structure for an instrument using an aperture dial that prevents light from leaking to the front surface of the board.

0002

[Conventional technology]

Traditionally, it is possible to accurately read the indicated value of an analog meter, etc. , by raising the periphery of the dial on which letters, scales, etc. are formed, and forming the center of the dial. A dial with a concave part is used. The height of the periphery of this type of dial is The height should be approximately the same as the pointer attached to the center of the dial. This makes it possible to read the indicated value of the pointer extremely accurately even when viewed from an oblique direction. This makes it possible to reduce visual recognition errors.

0003 This type of dial usually has its raised formation as shown in Figures 3 and 4. The bent end of the facing 22 is located at the edge 24 (34 in FIG. 4) 29 are aligned, and from the front of the dial 21 (31 in FIG. 4), the dial 21 (or 31) so that the peripheral part 24 (or 34) and the machinery inside the instrument are not visible. At the same time, the gauges are used to illuminate the characters, scales, etc. on the dial plate 21 (or 31) and the pointers. This prevents the light from the light source placed inside from leaking outside from this part.

0004

[Problem that the idea aims to solve]

However, since dials of this type are generally manufactured by drawing, the As shown in the figure, when the center part 23 (or 33) is squeezed by press working etc., the part indicated by arrow A is expanded. As a result, the peripheral edge 24 (or 34) is distorted in the direction of arrow B, resulting in a wavy state. In some cases, it is difficult to make the peripheral portion 23 (or 33) completely flat. child When the endpaper 22 is attached to the aperture dial plate as shown in Figures 3 and 4, the endpaper 22 is A gap is created between the bent tip 23 and the peripheral edge 24 (or 34), and the instrument There is a problem that internal illumination light leaks through the gap.

[0005] This invention is an aperture letter that prevents the light inside the instrument from leaking between the dial and endpaper. The purpose is to provide a structure that prevents light leakage for instruments using plates.

[0006]

[Means to solve the problem]

The light leakage prevention structure of the instrument using an aperture dial according to the present invention is such that the central part is recessed rearward. The periphery of the aperture dial whose periphery is raised forward is the entire periphery of the dial or approximately an endpaper formed in a substantially trapezoidal cross section over the entire circumference and engaged with the peripheral edge of the aperture dial; A protruding portion is formed with a substantially U-shaped cross section, and one of the U-shaped portions is formed as an abutting wall. so that it touches the upper side of the trapezoidal periphery, and the other part touches the outer wall of the periphery. It is characterized by being configured so that it covers the body.

[0007]

[Effect]

Based on the above configuration, when the endpaper is engaged from the front side of the aperture dial, the endpaper The abutment wall near the center of the aperture dial of the approximately U-shaped cross section is located near the periphery of the dial. Another part of the U-shaped part that touches the upper side of the trapezoidal periphery all the way around. The part engages the entire circumference of the dial while covering the outer wall of the trapezoidal periphery of the dial. Ru. For this reason, the light from the light source located inside the device is blocked by this part and the text There is no leakage to the front of the dial.

[0008]

【Example】

Embodiments of the present invention will be described below based on the drawings.

[0009] Figure 1 shows an example of the light leakage prevention structure of an instrument using an aperture dial according to the present invention. has been done. The drawing dial plate 1 has a flat center part 3 by drawing processing such as press processing. The shape is concave backward (downward in the figure), and the peripheral edge 4 is raised forward (upward in the figure). It is formed into a substantially trapezoidal cross section. The left side of the aperture dial plate 1 is the dial plate in the figure. A hole (not shown) is made in the center, and the pointer shaft passes through it. A pointer is attached to the tip of the needle shaft. Further, the trapezoidal peripheral portion 4 is formed on the dial plate 1. An inner wall 5 rising steeply from the center side, a horizontal upper side 6, a substantially vertical outer wall 7, and It consists of a horizontal end 8.

0010 Characters are usually written near the periphery 4 of the center 3 of the dial 1, and the periphery A scale is written on the inner wall 5 of 4, and the position of the scale is from the center part 3 of the dial 1. The pointer is set at approximately the same height as the pointer, and even when viewed from an angle, the pointer is extremely accurate. The indicated value can be read.

[0011] On the other hand, as shown in FIG. The tip portion is formed to protrude approximately in a U-shaped cross section, and one of the U-shaped portions is The contact wall 9 is in contact with the upper side 6 of the trapezoidal peripheral part, and the other part is the light shielding wall 1. 0 so as to cover the outer wall 7 of the peripheral edge portion 4. For this reason, the corresponding endpaper 2 is attached to the front of the aperture dial plate 1, the contact wall 9 extends around the entire circumference of the dial plate 1. The light shielding wall 10 is in contact with the upper side 6 of the trapezoidal peripheral edge 4, and the light shielding wall 10 is connected to the trapezoidal peripheral edge of the dial 1. The outer wall 7 of the portion 4 is covered and engaged over the entire circumference of the dial 1.

0012 The peripheral edge 4 of the dial 1 and the portion of the endpaper 2 that engages with the peripheral edge 4 are arranged in this way. Because it is constructed of The light from the placed light source is transmitted to the light-shielding wall 10 of the endpaper 2 and the outer wall 7 of the peripheral edge 4 of the dial 1. Therefore, leakage to the front of the dial 1 is prevented, so there is no possibility of it becoming an eyesore. No situation arises. In addition, although the dial 1 is manufactured by drawing, the peripheral edge 4 is Since the cross section is approximately trapezoidal, the dimensions and shape can be easily seen during the drawing process. and the warping of the dial 1 and the waving of the peripheral edge 4 after processing are absorbed by the outer wall 10. It has the effect of

[0013] Next, a second example will be described.

[0014] FIG. 2 shows a second embodiment of the light leakage prevention structure of an instrument using an aperture dial according to the present invention. It is shown. The shape of the endpaper part in this example is different from that in the previous example. Since it is exactly the same as that shown in FIG.

[0015] The difference from the previous embodiment is in the shape of the aperture dial plate 11, and the center part 13 of the dial plate 11 is different from the previous embodiment. The area from the peripheral edge 14 is raised in an arcuate curve, and the peripheral edge 1 4 is an inner wall 15 that rises in a curved manner from the center side of the dial 11, and a horizontal upper side 1. 6. It is composed of a substantially vertical outer wall 17 and a horizontal end portion 18, and has a substantially trapezoidal cross section. . Therefore, when the endpaper 2 is attached to the front of the aperture dial plate 11, the abutting wall 9 The entire circumference of the peripheral edge 14 of the plate 11 is in contact with the upper side 16 of the trapezoidal peripheral edge 14, and is light-shielding. The wall 10 covers the entire outer wall 17 of the trapezoidal peripheral portion 14 of the dial 11. The shape engages around the circumference.

[0016] Therefore, the light leakage prevention effect in this example is exactly the same as that in the previous example. is obtained.

[0017]

[Effect of the idea]

As explained above, according to the present invention, the periphery of the aperture dial is Or, since it is formed to have a trapezoidal cross section over almost the entire circumference, it prevents the dial from warping or deforming. At the same time, the part of the endpaper that engages with the peripheral edge is formed to protrude into a substantially U-shaped cross section. Then, one of the U-shaped portions is used as an abutting wall and touches the upper side of the trapezoidal peripheral edge. The other part is constructed so as to cover the outer wall of the peripheral part as a light shielding wall. This prevents light from leaking from this engaging part and provides a high-quality instrument. I can do it.

[Submission date] October 9, 1991

[Procedural amendment 1]

[Name of document to be amended] Specification

[Correction target item name] 0012

[Correction method] Change

[Correction details]

[0012] Since the peripheral edge 4 of the dial 1 and the portion of the facing 2 that engages with the peripheral edge 4 are configured in this way, the instrument can be used to illuminate the characters, scales, etc. of the dial and the hands. The light from the light source placed inside is prevented from leaking to the front surface of the dial 1 by the light shielding wall 10 of the facing 2 and the outer wall 7 of the peripheral edge 4 of the dial 1, so that the situation where it becomes an eyesore is prevented. Does not occur. In addition, although the dial 1 is manufactured by drawing, the peripheral edge 4 is formed to have a substantially trapezoidal cross section, so that the dimensions, shape, etc. during the drawing process can be easily seen, and the dial 1 after processing This has the effect that warping and waving of the peripheral edge 4 are absorbed by the outer wall 7 .

[Brief explanation of drawings]

FIG. 1 is a sectional view of an embodiment of the light leakage prevention structure of a meter using an aperture dial according to the present invention, viewed from the side.

FIG. 2 is a sectional view of a second embodiment of the light leakage prevention structure of an instrument using an aperture dial according to the present invention, viewed from the side;

FIG. 3 is a side sectional view showing a state of engagement between a conventional aperture dial and endpaper.

FIG. 4 is a side sectional view showing another conventional aperture dial plate and endpaper engaged with each other.

FIG. 5 is a plan view of the dial showing a state in which distortion occurs at the peripheral edge when the central portion of the dial is drawn.

[Explanation of symbols]

1,11 Aperture dial 2 Endpapers 3,13 Central part 4,14 Periphery 6,16 Top side 7,17 Exterior wall 10 Light blocking wall

Claims (1)

[Scope of utility model registration request] Claim 1: The peripheral edge of an aperture dial plate having a central portion concave backward and a peripheral edge raised forward is formed to have a substantially trapezoidal cross section over the entire circumference or substantially the entire circumference of the dial plate, and A portion of the endpaper that engages with the peripheral edge of the dial is formed to protrude and have a substantially U-shaped cross section, and one of the U-shaped portions is used as an abutment wall to contact the upper side of the trapezoidal peripheral portion. . A light leakage prevention structure for an instrument using an aperture dial, characterized in that the other portion is configured to cover the outer wall of the peripheral edge.