JP2605900B2 - Instrument equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an instrument device such as a speedometer or tachometer of a vehicle, or various gauges other than the vehicle.

[Prior Art] In general, an instrument device includes an instrument body, a dial,
After accommodating and assembling the hands and the like, a transparent protective cover is put on the open end of the case (see Japanese Utility Model Application Laid-Open No. 63-23614).

When this instrument device is applied to, for example, a two-wheeled vehicle exposed to the outside air, a large temperature difference may occur inside and outside the case when rain occurs, and steam may be generated inside the case.

In such a case, in the conventional instrument device, since there is an annular gap between the inner wall surface of the case and the outer periphery of the dial, generated water vapor adheres to the inner surface of the protective cover and foggs the protective cover.

For this reason, conventionally, fogging of the protective glass has been prevented by applying a paste-like antifogging agent to the inner surface of the protective cover.

[Problems to be Solved by the Invention] However, the work of applying the anti-fogging agent is performed manually, and it is necessary to apply the anti-fogging agent uniformly on the inner surface of the protective cover. Cost.

Therefore, the work of applying the anti-fogging agent is inferior in workability and productivity, and causes a high cost of the instrument device.

In addition, the performance of the antifogging agent is limited, and there is a problem that when the amount exceeds the saturated water absorption, the antifogging agent flows out as water droplets.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a low-cost instrument device with an improved fogging prevention effect.

[Means for Solving the Problems] The present invention employs the following technical means in order to achieve the above object.

In the first invention, a case having one side opened, an instrument main body accommodated in the case, a dial mounted on an upper portion of the instrument main body, and an opening of the case covering the upper side of the dial are provided. A protective cover that is hermetically assembled at the end via a packing, wherein the case is provided with a step surface that expands in a radial direction on an inner wall surface around which the dial is disposed, and the dial is provided with: An instrument device in which an outer peripheral portion is disposed in a state of being in contact with the step surface over the entire periphery, and a ventilation hole penetrating inside and outside is opened in the case wall surface below the dial, and An illumination lamp for illuminating and displaying the dial is housed inside the case, and the outer periphery of the instrument main body is covered by a transparent container having an upper end in close contact with the back surface of the dial, and the container illuminates the illumination in the case. A lamp and said vent Characterized in that it is tightly partitioned.

According to the second invention, the instrument body and the illuminating lamp for illuminating and displaying the dial attached to the upper part of the instrument body are accommodated in a case where one side is opened, and a transparent protective cover is provided on the open side of the case. Wherein the dial is provided in such a manner that an outer peripheral portion thereof is provided in contact with an inner wall surface of the case over the entire circumference, and wherein the main body of the meter is provided. Is characterized in that, in the case, the outer periphery is covered with a transparent container whose upper end is in close contact with the back surface of the dial, so as to be separated from the illumination lamp and the ventilation hole.

[Function and Effect of the Invention] According to the first invention, it is possible to prevent water vapor from passing through the shaft hole for the pointer formed through the dial and preventing the protective cover from fogging. That is, since the upper end of the container that separates the instrument main body from the ventilation hole and the illumination lamp is in close contact with the back surface of the dial, the shaft hole formed in the dial is naturally also separated from the ventilation hole and the illumination lamp by the container. . Thereby, even if the moisture that has entered the case from the vent hole evaporates due to the heat of the lighting lamp or the like, the water vapor does not enter the container,
Therefore, the protective cover does not pass through the shaft hole formed in the dial and does not reach the space above the dial, so that the protective cover can be prevented from fogging. In addition, the moisture evaporated by the heat of the illumination lamp and the like adheres to the back surface of the dial, but there is no problem in the visibility of the dial because it is the back surface.

According to the second invention, the instrument main body is covered with the transparent container, and is divided into the illumination lamp and the ventilation hole in the case. Even if it evaporates, the water vapor does not enter the container. Accordingly, it is possible to prevent the water vapor from passing through the shaft hole for the pointer formed through the dial and preventing the protective cover from fogging.

Example Next, an instrument device of the present invention will be described based on an example shown in the drawings.

1 is a longitudinal sectional view of the instrument device, FIG. 2 is a perspective view of a dial, and FIG. 3 is a perspective view of a packing.

The instrument device 1 of the present embodiment is applied to a tachometer for a motorcycle.

The instrument device 1 includes a cylindrical case 2 that is open on only one side (upper side in FIG. 1), and accommodates an instrument main body 3 inside the case 2.

The case 2 is formed so that the inner diameter of the case 2 is slightly larger from slightly above the upper surface of the housed instrument body 3 to the open end of the case 2. The stepped surface formed on the entire inner wall surface due to the different inner diameter functions as a dial receiving portion 2a for supporting the outer peripheral portion of the dial 4 described later.

The instrument body 3 has a disk-shaped dial 4 on which the number of revolutions of an engine (not shown) is graduated.
Is fixed to the upper part (the upper side in FIG. 1).

The dial 4 is formed so that its outer diameter is substantially the same as the inner diameter of the case 2 above the dial receiver 2a.
Therefore, when the dial 4 is fixed to the instrument main body 3, the outer peripheral portion is in contact with the dial receiving portion 2 a formed on the inner wall surface of the case 2 over the entire circumference.

The dial 4 is made of resin (for example, acrylic resin), and has a surface (open side surface of the case 2) on its surface as shown in FIG.
Designs 4a such as numbers and marks indicating the number of revolutions of the engine are printed.

The dial 4 is colored (for example, black) on the surface other than the design 4a, such as numerals and marks, except for the outer peripheral portion of the dial 4, to improve the visibility of the design 4a at night. When light is applied from the back side of the dial 4, the design 4a portion such as a numeral or a mark transmits light, and the colored portion 4b is provided so as to block the light.

The instrument body 3 has a dial 4 according to the engine speed.
A pointer 6 for designating the scale of is attached. The pointer 6 has a boss 6a formed near the base of the pointer 6.
Is fitted to the rotating shaft 3a of the instrument main body 3 which protrudes into a shaft hole 4c formed in the center of the dial 4 to be supported by the instrument main body 3.

A lamp 7 for night illumination is provided at the bottom in the case 2, and the light of the lamp 7 passes through the design 4 a from behind the dial 4 to illuminate the design 4 a. . The light of the lamp 7 that has passed through the light-transmitting portion 4d, which is the outer peripheral portion of the uncolored dial 4, is reflected on the inner wall surface of the case 2 or on the return portion 8a of the packing 8 described later. By hitting the hands 6, the hands 6 are illuminated.

At the open end of the case 2, a transparent protective cover 9 (for example, made of glass) held by a packing 8 made of an elastic material (for example, made of rubber) for waterproofing and dustproofing is attached. The protective cover 9 is assembled to the case 2 by tightening and fixing the packing 8 to the outer peripheral edge of the case 2 by an annular window case 10.

The packing 8 is provided with a protective cover 9 as shown in FIG.
Dial holding portion extending downward along the inner wall surface of the case 2 and having an annular groove portion 8b for holding
8c and the above-mentioned return portion 8a are formed.

The dial holding portion 8c is provided at a plurality of locations (nine locations in the present embodiment) on the entire circumference of the packing 8, and comes into contact with the dial receiving portion 2a of the case 2 when the packing 8 is fixed to the case 2. The pressed outer peripheral portion of the dial 4 is pressed from above.

The return portion 8a is formed conically toward the lower side of the packing 8, reflects the light of the lamp 7, shines the light on the pointer 6, and prevents glare caused by the direct light of the lamp 7.

Next, assembling of the instrument device 1 will be briefly described based on an exploded perspective view of the instrument device 1 shown in FIG.

First, the instrument body 3 and the lamp 7 (see FIG. 1)
Put in case 2 and fix.

Next, the dial 4 is fixed to the upper part of the instrument main body 3 with screws 5. At this time, the outer peripheral portion of the dial 4 comes into contact with the dial receiving portion 2a of the case 2.

The instrument main body 3 protruding through the shaft hole 4c of the dial 4
The boss 6a of the pointer 6 is fitted into the rotary shaft 3a, and the pointer 6 is attached to the instrument body 3.

The outer periphery of the protective cover 9 is fitted into the groove 8 b of the packing 8, and the packing 8 is attached to the open end of the case 2 together with the protective cover 9.

Finally, wind case 10 is packed with packing 8 and case 2.
The packing 8 is fixed to the case 2 by tightening so as to enclose the outer periphery of the packing 8.

At this time, when the dial pressing portion 8c of the packing 8 presses the outer peripheral portion of the dial 4, the outer peripheral portion of the dial 4 is brought into close contact with the dial receiving portion 2a of the case 2. For this reason, the inside of the case 2 is separated by the dial 4 into a space A for accommodating the instrument main body 3 below the dial 4 and a space B formed between the dial 4 and the protective cover 9 above the dial 4. Partitioned airtight.

 Thus, the assembling of the instrument device 1 is completed.

In the two-wheeled vehicle as in the present embodiment, since the meter device 1 is exposed to the outside air, a large temperature difference occurs inside and outside the case 2 during rainy weather and the like, and the dial 4 in the case 2 having the meter body 3 is formed. In the lower space A, water vapor may be generated.

However, in the instrument device 1 according to the present embodiment, since the generated steam is blocked by the dial 4, it does not adhere to the inner surface of the protective cover 9, and therefore, it is possible to prevent the protective cover 9 from fogging. The water vapor generated in the space A below the dial 4 adheres to the back surface of the dial 4, but the surface of the dial 4 is colored (including the design 4a).
There is no problem in the visibility of the dial 4.

As described above, the instrument device 1 of the present embodiment has a double glass structure including the dial 4 and the protective cover 9,
Water vapor can be prevented from adhering to the protective cover 9 and the protective cover 9 can be prevented from fogging.

Therefore, unlike the related art, there is no need to apply an anti-fogging agent to the inner surface of the protective cover 9, and the operation of applying the anti-fogging agent, which has been a factor of high cost, can be eliminated. Can be reduced.

Further, in this embodiment, the positioning accuracy of the dial with respect to the case can be easily obtained only by bringing the outer peripheral portion of the dial into contact with the stepped surface provided on the inner wall surface of the case. Further, a space B formed between a space A below the dial 4 that houses the instrument body 3 and a protective cover 9 above the dial 4.
It is not necessary to join the outer peripheral portion of the dial 4 to the inner wall surface of the case 2 with an adhesive or the like in order to air-tightly separate the dial 2 from the dial 2. The space A below the dial 4 and the space B above the dial 4 can be easily airtightly separated simply by pressing the outer peripheral portion of the dial 4 that comes into contact with the dial from above.

Next, FIGS. 5 to 7 show the second embodiment according to the second invention.
An example will be described.

Components having the same operation and structure as the first embodiment are denoted by the same reference numerals.

In this embodiment, as in the first embodiment, the outer peripheral portion of the dial 4 is in contact with the dial receiving portion 2a formed on the inner wall surface of the case 2 over the entire circumference. Then, as shown in FIG. 5, the instrument main body 3 is covered in the case 2 by a transparent capsule 11 (eg, a resin molded product or glass) which is a container of the present invention.

The capsule 11 has a cup shape opened only at the top,
After housing the instrument body 3, the instrument body 3 is fastened together with the instrument body 3 to the bottom surface of the case 2 by a screw 12. The capsule 11 is provided such that the upper end opening surface of the capsule 11 is in close contact with the back surface of the dial 4 attached to the meter body 3 when the capsule 11 is fixed in the case 2 together with the meter body 3.

As a method for fixing the capsule 11, as shown in FIG. 6, the capsule 11 is formed into a cylindrical shape, and the lower end of the capsule 11 is inserted into a circumferential groove 13 formed in the bottom of the case 2;
The upper surface of 11 may be held down by the dial 4 and fixed.

This capsule 11 has the above configuration,
It is installed so as to partition the lamp for night illumination (the illumination lamp of the present invention) 7, the vent hole 14 formed in the bottom corner of the case 2, and the instrument main body 3.

In FIG. 5, only the lamp 7 has a shape in which the corners of the capsule 11 are concave, but the shape of the capsule 11 is as follows.
Various changes are made depending on the use conditions in case 2. Also,
In consideration of the visibility of the dial 4 during nighttime illumination, it is necessary to make the shape such that the illuminance of the lamp 7 on the dial 4 does not decrease.

Next, the assembling of the instrument device 1 will be briefly described based on an exploded perspective view of the instrument device 1 shown in FIG.

First, on the upper part of the instrument body 3, the dial 4 is
Is fixed. Then, the boss 6a of the pointer 6 is fitted into the rotating shaft 3a of the instrument main body 3 protruding from the shaft hole 4c of the dial 4, and the pointer 6 is assembled to the instrument main body 3.

Next, the lamp 7 is fixed at a predetermined position in the case 2 (the fifth lamp).
After that, the capsule 11 is stored in the case 2.
The instrument body 3 with the dial 4 and the pointer 6 attached
Is accommodated in a capsule 11, and the capsule 11 and the instrument main body 3 are fastened together and fixed to the case 2 by a screw (see FIG. 5) 12. At this time, the outer periphery of the dial 4 is
Of the dial receiving portion 2a.

After that, the outer peripheral portion of the protective cover 9 is fitted into the groove 8 b of the packing 8, and the packing 8 is attached to the open end of the case 2 together with the protective cover 9.

Finally, wind case 10 is packed with packing 8 and case 2.
The packing 8 is fixed to the case 2 by tightening so as to enclose the outer periphery of the packing 8.

At this time, when the dial pressing portion 8c of the packing 8 presses the outer peripheral portion of the dial 4, the outer peripheral portion of the dial 4 is brought into close contact with the dial receiving portion 2a of the case 2.

 Thus, the assembling of the instrument device 1 is completed.

As in the present embodiment, the instrument main body 3 is covered with the capsule 11 and the instrument main body 3 is partitioned from the lamp 7 and the ventilation hole 14, so that moisture that has entered from the ventilation hole 14 or the like is heated by the lamp 7 or the like. Even if it evaporates, the water vapor
11 It can be prevented from entering the inside.

Therefore, water vapor does not pass through the shaft hole 4c formed in the dial 4 to fog the protection cover, and the antifogging performance can be further improved as compared with the first embodiment.

(Modification) In the above embodiment, the meter device 1 of the present invention is applied to a tachometer of a motorcycle, but may be applied to a speedometer and various gauges. The invention is not limited to two-wheeled vehicles, but may be applied to various meters for four-wheeled vehicles, railway vehicles, ships, etc., or various meters for homes and factories.

Although the number 8 of the dial pressing portions of the packing 8 is nine (in the embodiment, nine), it may be formed over the entire circumference.

[Brief description of the drawings]

1 to 4 show a first embodiment according to the first invention. FIG. 1 is a longitudinal sectional view of an instrument device, FIG. 2 is a perspective view of a dial, and FIG. FIG. 4 is an exploded perspective view of the instrument device. 5 to 7 show a second embodiment according to the second invention. FIGS. 5 and 6 are longitudinal sectional views of the instrument device, and FIG. 7 is an exploded perspective view of the instrument device. . In the figure, 1 ... instrument device 2 ... case 2a ... dial plate receiving part (stepped surface) 3 ... instrument body 4 ... dial plate 7 ... lamp (illumination light) 8 ... packing 8c ... dial plate holder Part 9: Protective cover 11: Capsule (container) 14: Vent

Claims (2)

(57) [Claims] A case which is open at one end; an instrument body accommodated in the case; a dial attached to an upper portion of the instrument body; and an open end of the case covering an upper part of the dial. A protective cover that is hermetically assembled via a packing, wherein the case is provided with a step surface that expands in a radial direction on an inner wall surface around which the dial is disposed, and the dial has an outer periphery The instrument device is arranged in a state where the portion is in contact with the step surface over the entire circumference, wherein a vent hole penetrating inside and outside is opened in the case wall surface below the dial, and the case is provided. An illumination lamp for illuminating and displaying the dial is housed therein. The outer periphery of the instrument main body is covered by a transparent container whose upper end is in close contact with the back surface of the dial, and the illumination lamp is provided in the case by the container. And the ventilation holes and air An instrument device characterized by being densely partitioned. 2. A case having one side opened therein accommodates an instrument body and an illumination lamp for illuminating and displaying a dial attached to an upper part of the instrument body, and a transparent protective cover is provided on an open side of the case. An instrument device configured and assembled and having a vent hole formed in a wall of the case, wherein the dial is provided so that an outer peripheral portion thereof is in contact with an inner wall surface of the case over the entire periphery, and the instrument main body is The instrument device is characterized in that, in the case, the outer periphery is covered with a transparent container whose upper end is in close contact with the back surface of the dial, so as to be separated from the illumination lamp and the ventilation hole.