JPH0517618Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention is an analog type indicating instrument, and more specifically relates to an indicating instrument configured to give instructions by waving a beam of light such as a laser beam. be.

[Background of the idea]

In general, an analog indicating instrument has a dial on which a scale is displayed, a pointer that indicates the scale on the dial, and a mechanical or electrical input that indicates the above pointer according to the quantity to be measured. It is composed of a movement that rotates by a predetermined angle.

In the case of analog type indicating instruments like this, the pointer is supported and fixed to the pointer shaft of the movement in a cantilevered state, so in order to allow the pointer to rotate smoothly. A weight (protrusion) for balance adjustment must be provided at the rear end of the pointer, which increases the weight of the entire pointer. In other words, if you try to make the pointer longer or thicker to make it easier to see the movement of the pointer, the weight of the pointer will increase, making it difficult to use a long pointer.
If you are forced to use a minute hand, you will have to use a movement with a large drive torque that can drive the pointer, which will make the entire instrument larger and require a stronger drive input signal. There were various problems such as Therefore, as a means to solve this problem, the present inventors developed a movement 2 having a rotating shaft 1 that rotates by a predetermined angle according to the amount to be measured, as shown in FIG. 2, and a display indicating the amount to be measured. A plate 3, a light source 5 that emits beam-shaped light 4, and a light source 5 that is installed on the rotating shaft 1 and rotates together with the rotating shaft, directing the beam-shaped light from the light source from the side surface of the display panel 3 toward the display section. For example, by directing a laser beam into the display plate, a pseudo pointer is optically formed, and the pseudo pointer is swung according to the measured quantity input to the movement. We provide an indicator that allows you to read the value on a display board.

However, in the case of the above-mentioned prior art indicating instrument, the laser beam light entering the display board is incident from one end of the display board and emitted from the other end, so the display board The laser beam light that has passed through the interior hits the other end of the display board 3, that is, the outer end surface a, and some of the laser beam light is reflected, causing the outer end surface of the display board 3 to shine dimly. This caused a problem in that the contrast of the laser beam passing through the display panel 3 was hindered, resulting in poor visibility.

[Purpose of invention]

The present invention was devised in view of the above, and the present invention has been developed by making the light beam incident from one end of the display board reflect and emit outward from the display board at the other end of the display board. An object of the present invention is to provide an indicator that can enhance visibility by increasing the brightness contrast of a beam of light passing through the indicator.

[Example of idea]

The present invention will be explained in detail below based on the embodiment shown in FIG.

In the drawings, reference numeral 11 denotes a movement housed in an instrument case 12, and this movement 11 is provided with a rotating shaft that rotates by a predetermined angle depending on the amount to be measured.
The lower end of the arm 14, which has a substantially U-shaped side surface, is fixed, and a second reflecting mirror 15 is attached to the upper end of the arm 14. 1
Reference numeral 6 denotes a first reflecting mirror arranged such that the center of the reflecting surface is located on the axial extension of the rotation axis, and this first reflecting mirror 16 emits light from the laser oscillator 17. The laser beam 18 is arranged so as to be reflected by the second reflecting mirror 15 described above. Reference numeral 19 denotes an annular display plate made of transparent or translucent resin, which has a predetermined thickness and is inclined at approximately 45 degrees on its circumferential surface. A reflective surface 10 is formed. Note that the above reflective surface 10
is formed so that the angle θ with the back surface thereof is approximately 45 degrees, but it is not limited to this, and may be formed so that the angle θ with the display surface of the display board 19 is approximately 45 degrees. . 20 is a decorative cap attached to the central hole of the annular display board 19; 21 is a display section such as a character scale printed on the back side of the display board 19; 22 is a light source for illuminating the display section 21; 23 is a Display board 19
Shows the light shielding plate placed on the back side of the .

Next, to describe its effect, when a signal corresponding to the amount to be measured is input to the movement 11,
The rotating shaft 13 rotates by a predetermined angle in accordance with the input,
Thereby, the second reflecting mirror 15 is rotated about the axial extension line of the rotating shaft 13. At this time, when the laser beam 18 emitted from the laser oscillator 17 is irradiated onto the second reflecting mirror 15 via the first reflecting mirror 16, the reflected laser beam reflected from the second reflecting mirror 15 is , is irradiated into the interior of the display panel 19 from the incident side surface thereof. The laser beam thus incident on the display panel 19 is reflected by the 45-degree reflective surface 10 formed on the side surface of the display panel 19, and is reflected and emitted toward the back of the display panel 19. This eliminates the problem of blurred light in the peripheral area of the display panel 19, and therefore increases the brightness contrast of the laser beam passing through the display panel 19.
It is possible to provide a clear display using a laser beam, and it is possible to provide an indicator with excellent visibility.

[Summary of the idea]

As described above, the present invention provides a movement 1 having a rotating shaft 13 that rotates by a predetermined angle depending on the amount to be measured.
1, a display plate 19 made of a transparent material mixed with a light diffusing agent dye and indicating the amount to be measured; a light source 17 that emits a beam-shaped light; reflective optical means 15 and 16 that move light from the light source 17 toward the display section from the side surface of the display board 19;
This indicator is characterized by forming a reflective surface 10 for reflecting incident light from the display panel 19 toward the front or back surface of the display panel 19.

[Effect of idea]

Therefore, according to this indicator, the laser beam incident from one side end face of the display plate 19 displays the beam by passing through the display plate 19, and then enters the other side peripheral surface of the display plate 19. The display board 1
This eliminates the problem of blurred light in the peripheral area of the display panel 19, and therefore increases the brightness contrast of the laser beam passing through the display panel 19, making it possible to display clearly with the laser beam, resulting in excellent visibility. This has the effect of providing an indicating instrument.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing an embodiment of an indicating instrument according to the present invention, and FIG. 2 is an explanatory diagram of an indicating instrument according to the prior art. 10, 10'... Reflective surface, 11... Movement, 12... Instrument case, 13... Rotating shaft, 14
... Arm, 15 ... Second reflecting mirror, 16 ... First reflecting mirror, 17 ... Laser oscillator, 18 ... Laser beam, 19 ... Display board, 20 ... Decorative cap, 21 ... Display Part, 22...Light source, 23...
Light blocking plate.

Claims (1)

[Scope of utility model registration request] A rotating shaft 13 that rotates by a predetermined angle depending on the amount to be measured.
a movement 11 having a movement 11, a display plate 19 made of a transparent material mixed with a light diffusing agent dye and indicating the amount to be measured, and a light source 17 that emits a beam-shaped light.
reflective optical means 15 and 16 provided on the rotating shaft 13 and rotating together with the rotating shaft 13 to cause the light from the light source 17 to enter from the side surface of the display plate 19 toward the display section; An indicator characterized in that a reflective surface 10 is formed on the circumferential surface of the display plate to reflect the incident light from the light source 17 toward the front or back surface of the display plate 19.