JPH1073460A - Measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the measuring instrument, which positively performs the positioning of each member, especially a reverse plate and a nameplate and prevents the troubles such as the occurrence of drops in the visual recognizing region of the reverse plate of the measuring instrument. SOLUTION: A positioning tubular body 4c is protrudingly provided in the back and forth directions in an optical conductor 4. In a nameplate 3, a positioning hole 3b in correspondence with the tubular body 4c is formed. In an instrument case 1, a first positioning pin 1c is protrudingly provided in the forward direction in correspondence with the tubular body 4c. A second positioning pin 5c is protrudingly provided in the backward direction in correspondence with the tubular body 4c at the rear surface of a reverse plate 5. At this time, the positioning hole 3b of the nameplate 3 is inserted with the tubular body 4c, and the instrument case 1 and the optical conductor 4 are assembled. Thus, the first positioning pin 1c is inserted into the tubular body 4c. The second positioning pin 5c is inserted into the tubular body 4c by assembling the reverse plate 5 and the optical conductor 4. Thus, the instrument case 1, the nameplate 3 and the reverse plate 5 are positioned and fixed through the optical conductor 4. At the same time, the positioning of the nameplate 3 and the reverse plate 5 is performed positively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a speedometer for a vehicle,
Alternatively, the present invention relates to an instrument device for accommodating an instrument body such as a tachometer, an electronic device, and the like.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 4 and 5, this type of instrument device used for an instrument device for a vehicle has an instrument body 2 mounted and fixed in an instrument case 1 having a front side opened. The dial 3 and the light guide 4 are attached and fixed to the upper part of the instrument body 2 with screws (not shown) or the like.
A transparent cover 6 serving as a front case is attached to the front side of the device via a look-back plate 5. The instrument case 1, the dial 3, the light guide 4, the return plate 5 and the like need to be positioned and assembled so that their mounting positions do not shift from each other.

Therefore, the dial 3 and the light guide 4 are formed by forming a positioning hole 3a in the dial 3 and forming a positioning pin 4 in the light guide 4.
a is formed, and the dial 3 and the light guide 4 are positioned using these. Also, the light guide 4 and the instrument case 1
Means that a positioning cylindrical portion 4b protruding downward is formed on the light guide 4, a positioning pin 1a is formed on the instrument case 1, and the light guide 4 and the instrument case 1 are positioned using these. . The instrument case 1 and the return plate 5 are formed with positioning pins 1b in the instrument case 1 and the positioning holes 5a in the return plate 5, and these are used to position the instrument case 1 and the return plate 5. I was

However, in the above-mentioned conventional example, the dial 3 visually recognized from the front side is not particularly positioned with respect to the dial 5, and the boundary between the dial 5 and the dial 3 is displaced due to a positional shift between the dial 5 and the dial 3. L shifts, and the display portion 7 of the dial 3
There is a possibility that the visibility of the image may be reduced.

In order to ensure the positioning of each member, particularly the positioning of the dial 5 and the dial 3, for example, Japanese Unexamined Utility Model Publication No. 4-79214 discloses a method in which a positioning pin is protruded forward into an instrument case. The positioning pin is provided with a stepped portion which is in contact with the lower surface of the dial, and a positioning tubular body is provided on the lower surface of the transparent cover so as to protrude rearward in correspondence with the positioning pin. Insert the positioning hole formed in the return plate through the positioning pin, and insert the positioning tubular body into the positioning pin by assembling the transparent cover to the instrument case. An instrument device that clamps and fixes between a step portion and a positioning tubular body is disclosed.

[0006]

In the above prior art, a positioning tubular body is provided to project rearward from a lower surface of the transparent cover, and a tubular portion having a positioning hole is formed in the return plate. I had to. It is impossible to provide these cylindrical bodies and cylindrical parts in a so-called combination meter, in which a plurality of windows are provided on the facing plate and a plurality of meters facing the windows are provided, due to the design of the meter device. Met. Because, referring to FIG.
A hood 5b formed on the facing plate 5
The provision of the tubular body of the transparent cover 6, the tubular portion of the return plate 5, and the like in the viewing area 8 that is visible to the driver or the like inside the interior is because the design is unsightly and reduces the value of the product.

Therefore, in order to solve the problem of design and to prevent the misalignment of the dial plate 5 and the dial 3, a tubular body which is conventionally provided on the transparent cover 6 is formed on the lower surface of the dial plate 5. In this case, it is necessary to provide the positioning tubular body in the vicinity of the display unit 7 of the dial 3, and as a result, the tubular body must be provided in a portion corresponding to the viewing area 8 of the return plate 5. However, since the return plate 5 is made of a synthetic resin, if the tubular body is formed on the lower surface of the visible region 8 of the return plate 5, there is a possibility that resin sink may occur in the visible region 8 after the formation of the return plate 5. The sink marks were not preferable in the design of the return plate 5. When there is a distance between the flat plate surface 9 of the return plate 5 and the plate surface 10 provided with the display unit 7 of the dial 3 in order to obtain a sense of depth, the distance reaches the plate surface 10 of the dial 3. Therefore, it is necessary to extend the cylindrical body so that a molding defect such as resin sink is more likely to occur.

In view of this, the present invention has been made in view of this point, and ensures the positioning of each member, in particular, the return plate and the dial, as well as the occurrence of sink marks in the visible region of the return plate of the instrument device. It is an object of the present invention to provide an instrument device for preventing a malfunction.

[0009]

According to the present invention, an instrument case, an instrument body housed in the instrument case, a light guide disposed in front of the instrument body, and the light guide are provided to achieve the above object. A dial that is stacked and disposed on the instrument case, and a dial plate and a front case are assembled on the front side of the instrument case. A positioning hole corresponding to the positioning cylindrical body is formed, a first positioning pin is protruded forward in the instrument case corresponding to the positioning cylindrical body, and a first positioning pin is formed on a rear surface of the facing plate. The positioning case 2 is provided so as to protrude rearward in correspondence with the positioning cylindrical body, and the positioning hole of the dial is inserted through the positioning cylindrical body protruding forward, so that the instrument case and the light guide are provided. By assembling with the body The first positioning pins inserted into the tubular body, and inserting the second positioning pin into the tubular body by assembling the said dial plate and the light guide,
The instrument case, the dial and the return plate are positioned and fixed by the light guide.

Further, according to the present invention, in the above configuration, the second positioning pin is formed in a cylindrical shape.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a meter device according to the present invention, a positioning cylindrical body 4c is provided on a light guide 4 so as to protrude forward and backward, and a positioning hole 3b corresponding to the positioning cylindrical body 4c is formed on a dial 3. The first positioning pin 1c is formed in the instrument case 1 to protrude forward in correspondence with the positioning cylindrical body 4c, and the second positioning pin 5c is mounted on the back surface of the dial plate 5 by the positioning cylindrical body 4c. It protrudes toward the rear corresponding to. Dial 3
Positioning cylindrical body 4 provided with positioning hole 3b of light guide 4
c, the instrument case 1 and the light guide 4 are assembled, the first positioning pin 1c is inserted into the cylindrical body 4c, and the light guide 4 and the return plate 5 are assembled to form the second positioning pin 1c. The positioning pin 5c is inserted into the cylindrical body 4c, and the instrument case 1, the dial 3, and the return plate 5 are positioned and fixed by the light guide 4.

The second positioning pin 5c is formed in a cylindrical shape having a hollow portion 5d at the center.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of an embodiment of the present invention, and FIG.
Is a front view of the same embodiment with the transparent cover and the return plate removed, and FIG. 3 is a cross-sectional view of a main part of another embodiment. In addition,
The same reference numerals are given to the same and corresponding parts as the conventional example,
Detailed description is omitted.

In the instrument device according to one embodiment of the present invention shown in FIGS. 1 and 2, the instrument main body 2 is housed and fixed in an instrument case 1 made of a synthetic resin having a front side opened using screws (not shown). The dial 3 and the light guide 4 are attached and fixed to the upper part of the instrument main body 2 with screws (not shown) or the like, and a transparent cover 6 serving as a front case is attached to the front side of the instrument case 1 via a facing plate 5. Means for fixing the return plate 5 to the instrument case 1 uses screws (not shown) or the like. The transparent cover 6 is fixed to the return plate 5 by a hook or the like (not shown).

The light guide 4 is made of a light-transmitting synthetic resin, supports the dial 3 and illuminates the dial 3 through the back surface thereof, and guides and illuminates the pointer P with light from a light source (not shown). It is. The light guide 4 has a positioning tubular body 4c in the front-rear direction, that is, the side of the facing plate 5 and the instrument case 1.
It protrudes toward the side. By making the positioning tubular body 4c tubular, the structural strength of the tubular body 4c can be increased. The dial 3 has a positioning tubular body 4.
A positioning hole 3b corresponding to c is formed.

The instrument case 1 has a first positioning pin 1c protruding toward the light guide 4 so as to correspond to the positioning cylindrical body 4c. This first positioning pin 1c
Is inserted into the cylindrical body 4c. A second positioning pin 5c is provided on the rear surface of the dial plate 5 so as to project toward the light guide 4 corresponding to the positioning tubular body 4c. This second positioning pin 5c is also inserted into the cylindrical body 4c. These first and second positioning pins 1c, 5c
The pins 1c, 5c
In forming, processing such as die cutting is easy.

Then, the positioning hole 3b of the dial 3 is inserted into the positioning cylindrical body 4c protruding from the front facing plate 5 side, and the positioning pin 4a of the light guide 4 is inserted into the positioning hole 3a of the dial 3. By inserting, the dial 3 and the light guide 4
And positioning. Also, the first positioning pin 1 c is attached to the cylindrical body 4 by assembling the instrument case 1 and the light guide 4.
c, and the instrument case 1 and the light guide 4 are positioned. Further, by assembling the light guide 4 and the return plate 5, the second positioning pin 5c is inserted into the cylindrical body 4c,
The light guide 4 and the return plate 5 are positioned. Therefore, the instrument case 1, the dial 3 and the dial 5 are positioned via the light guide 4. In particular, the dial 3 and the dial 5 are reliably positioned via the light guide 4.

As a result, it is possible to prevent the visibility of the display unit 7 of the dial 3 from deteriorating due to a positional shift between the dial 5 and the dial 3.

The positioning cylindrical member 4c formed on the light guide 4 is formed to protrude to the vicinity of the lower surface of the return plate 5, so that the second positioning pin 5c inserted into the cylindrical member 4c is formed.
Can be formed in such a size that sink marks or the like do not occur in the viewing area 8 of the return plate 5. In the case of this embodiment, the flat plate surface 9 of the visible area 8 of the return plate 5 can be obtained. it can. This is particularly effective when used in an instrument device in which there is a distance between the flat plate surface 9 of the dial plate 5 and the plate surface 10 on which the display unit 7 of the dial 3 is provided. Quality can be prevented from lowering. For this reason, it is not necessary to apply a treatment such as painting to the surface of the return plate 5, and the manufacturing cost can be reduced.

As another embodiment, as shown in FIG. 3, a hollow portion is formed at the center of the second positioning pin 5c in order to prevent sink marks on the plate surface 9 in the viewing area 8 due to the second positioning pin 5c. It may be cylindrical with 5d. By making the second positioning pin 5c cylindrical, the capacity of the resin required for forming the second positioning pin 5c can be reduced, and the influence of the contraction of the resin can be reduced. Sink can be suppressed.

In each of the above embodiments, the tubular body 4c projecting in the direction of the return plate 5 and the tubular body 4c projecting in the direction of the instrument case 1 are penetrated tubular bodies formed on the same axis. However, it is not always necessary to provide them on the same axis, and the axes may be shifted to form a bottomed cylindrical body 4c.

[0022]

As described above in detail, in the instrument device of the present invention, a positioning tubular body is provided on the light guide so as to protrude forward and backward, and a positioning hole corresponding to the positioning tubular body is formed in the dial. Then, a first positioning pin is provided in the instrument case so as to protrude forward in correspondence with the positioning tubular body, and a second positioning pin is provided on the back surface of the facing plate toward the rear corresponding to the positioning tubular body. To protrude. The first positioning pin is inserted into the cylindrical body by inserting the positioning hole of the dial through the positioning cylindrical body provided in the light guide, and assembling the instrument case and the light guide. Second by assembling with a board
The positioning pin is inserted into the cylindrical body, and the instrument case, the dial and the dial are positioned and fixed by the light guide, so that the dial and the dial can be reliably positioned.

Further, by providing the light guide with the positioning tubular body projecting in the dial plate direction, it is not necessary to form the second positioning pin projecting in the dial plate length on the dial plate. The occurrence of sink marks can be suppressed in the visual recognition area. In particular, in the case of an instrument having a distance between the plate surface of the return plate and the plate surface of the dial, a more remarkable effect can be obtained.

Further, since the second positioning pin is formed in a cylindrical shape having a hollow portion at the center thereof, it is possible to prevent sinks from being generated in the visible region of the return plate.

[Brief description of the drawings]

FIG. 1 is a sectional view of one embodiment of the present invention.

FIG. 2 is a front view of the embodiment with a transparent cover and a return plate removed.

FIG. 3 is a sectional view of a main part of another embodiment.

FIG. 4 is a sectional view of a conventional example.

FIG. 5 is a front view of the conventional example with a transparent cover and a return plate removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument case 1c 1st positioning pin 2 Instrument main body 3 Dial 3a, 3b Positioning hole 4 Light guide 4c Positioning cylindrical body 5 Return plate 5c 2nd positioning pin 5d Hollow part 6 Transparent cover (front case)

Claims (2)

[Claims] 1. An instrument case, an instrument body housed in the instrument case, a light guide disposed on the front face of the instrument body, a dial laminated on the light guide, and a front face of the instrument case. In the instrument device for assembling the facing plate and the front case on the side, a positioning tubular body is provided on the light guide to protrude forward and backward, and a positioning hole corresponding to the positioning tubular body is formed in the dial. A first positioning pin is protruded forward in the instrument case corresponding to the positioning tubular body, and a second positioning pin is provided on the back surface of the dial plate in correspondence with the positioning tubular body. Protruding rearward,
The positioning hole of the dial is inserted through the positioning tubular body projecting forward, and the first positioning pin is inserted into the tubular body by assembling the instrument case and the light guide, The second positioning pin is inserted into the tubular body by assembling the light guide and the dial, and the instrument case, the dial and the dial are positioned and fixed by the light guide. The instrument device characterized by the above. 2. The instrument device according to claim 1, wherein said second positioning pin has a cylindrical shape.