JPH11230842A - Structure for attaching bourdon-tube gauge of combination meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position and fix a Bourdon-tube gauge on a wiring board in a combination meter integrally formed with its turned-back part and case. SOLUTION: In a combination meter, a wiring board 4 composed of a hard printed board is attached to the back side of a case 1 having an integrally formed turned-back part on the front side of its outer peripheral wall section 1b, and various kinds of internal machines are mounted on the wiring board 4. Positioning pins 16 are formed in the outer peripheral wall section 16 of the case 1, and the positioning holes 14 of the fixing plate 11 of a Bourdon-tube gage 8 are slid on the pins 16. Then the wiring board 4 is put on the fixing plate 11 and fixed with screws 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bourdon tube gauge mounting structure for a combination meter.
The present invention relates to a Bourdon tube gauge mounting structure in which a Bourdon tube gauge is accurately positioned in a combination meter in which an inner machine is directly mounted on a wiring board.

[0002]

2. Description of the Related Art A Bourdon tube gauge is required to be accurately positioned and securely fixed in order to connect a hose or the like to a base when assembling to a vehicle.

Conventionally, in order to attach a Bourdon tube gauge to a case of a combination meter, a concave portion 9 is formed in a bottom portion 1c of the case 1 as shown in FIG. Fit, base 1
By tightening 2 to the bottom 1c with the nut 13,
Positioning and fixing are performed.

[0004]

The means as shown in FIG.
A structure in which the Bourdon tube gauge 8 is attached to the bottom surface 1c of the case 1 is established, but it is difficult to form the recess 9 in the circuit board with a combination meter in which an internal machine or a Bourdon tube gauge is directly attached to the circuit board. It is.

[0005] In particular, in the improved combination meter of the facing and case integrated type, a wiring board is mounted on the back side of the case, and various internal units and Bourdon tube gauges are directly mounted on the wiring board. Such a structure cannot be adopted, and another means is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and in a combination meter with a facing and case integrated type, a Bourdon tube gauge is attached to a combination meter in which a Bourdon tube gauge can be positioned and fixed to a wiring board. The purpose is to provide a structure.

[0007]

In order to achieve the above object, the invention according to claim 1 is directed to a Bourdon of a combination meter in which an inner unit and a Bourdon tube gauge are directly mounted on a wiring board mounted on the back side of a case. A tube gauge mounting structure, wherein a positioning pin is formed on an outer peripheral wall of the case, a positioning hole formed in a fixing plate of the Bourdon tube gauge is inserted into the positioning pin, and the wiring board is mounted on the fixing plate. It is characterized by being stacked and fixed.

Therefore, in the invention according to the first aspect, the positioning is accurately performed by fitting the positioning hole of the Bourdon tube gauge into the positioning pin of the outer peripheral wall. Therefore, the positioning and fixing of the Bourdon tube gauge, which has been a problem in the combination meter of the type in which the inner unit is directly mounted on the wiring board, can be reliably performed using the outer peripheral wall of the case.

According to a second aspect of the present invention, there is provided the bourdon tube gauge mounting structure for the combination meter according to the first aspect, wherein a screw hole is formed in the outer peripheral wall of the case in proximity to the positioning pin. A fixing hole is formed in the fixing plate in proximity to the positioning hole, and the wiring board and the fixing plate are fixed to the outer peripheral wall portion via screws inserted into the mounting hole and the screw hole. It is a feature.

For this reason, according to the second aspect of the present invention, it is possible to fix the positioning portion with screws.

According to a third aspect of the present invention, there is provided the bourdon tube gauge mounting structure for the combination meter according to the first or second aspect, wherein the case has a facing portion formed integrally with a front portion of an outer peripheral wall portion. The wiring board made of a hard printed board is attached to the back side of the case, and various internal units and Bourdon tube gauges are attached to the wiring board.

Therefore, according to the third aspect of the present invention, the Bourdon tube gauge can be reliably mounted on the combination meter that is integrated with the head and case.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. The same members or those having the same functions as those in FIG. 3 are denoted by the same reference numerals.

In FIG. 1, a case 1 has a structure in which a facing is integrated, and a facing portion 1a on a front surface and an outer peripheral wall portion 1b.
It is structured with A window hole 2 corresponding to each internal unit is formed in the look-back portion 1a, and a mounting bracket 3 is formed in the outer peripheral wall portion 1b. The back side of the case 1 is open by removing the bottom surface. The wiring board 4 is attached to the opened portion, and the front glass 5 is attached to the front part. The front glass 5 is attached by engaging an engagement claw 5a formed on the outer periphery with an engagement hole 1c formed in the facing portion 1a.

The wiring board 4 uses a hard printed board.
Various internal machines, for example, a tachometer internal machine 6,
In addition to the inner gauge unit 7, a Bourdon tube gauge 8 is attached as follows.

In FIG. 2, the Bourdon tube gauge 8 includes a Bourdon tube 10 and a fixing plate 11 to which the Bourdon tube 10 is fixed. The Bourdon tube 10 is fixed by fastening its base 12 to a fixing plate 11 with a nut 13. At both ends of the fixing plate 11, a positioning hole 14 and a mounting hole 15 are formed close to each other.

A positioning pin 16 and a screw hole 17 are formed close to each other at the lower end edge on the back side of the outer peripheral wall 1b of the case 1. Further, a lead-out hole 18 and a mounting hole 19 of the base 12 are formed in the wiring board 4.

The positioning hole 14 of the fixing plate 11 is fitted into the positioning pin 16 (at this position, the mounting hole 15 and the screw hole 17 are inserted).
By screwing the screw 20 from the mounting hole 19 of the wiring board 4 and the mounting hole 15 of the fixing plate 11 into the screw hole 17 of the outer peripheral wall 1b, the Bourdon tube gauge 8 is positioned and the case 1 and It is fixed to the wiring board 4.

As described above, in the Bourdon tube gauge mounting structure of the combination meter according to the present embodiment, the positioning plate 16 is provided on the outer peripheral wall 1b of the case 1 to position the fixed plate 11 of the Bourdon tube gauge 8. Therefore, the positioning and fixing of the Bourdon tube gauge, which has been a problem in the combination meter of the type in which the inner machine is directly mounted on the wiring board 4, can be reliably performed. Also,
Since the mounting screw hole 17 is formed in the outer peripheral wall portion 1b in the vicinity of the positioning pin 16, it can be fixed by the screw 20 at the positioning position.

[0020]

As described above, according to the first aspect of the present invention, a positioning pin is formed on the outer peripheral wall of the case, and the positioning pin is formed in the fixing plate of the Bourdon tube gauge. The positioning and fixing of the Bourdon tube gauge, which has been an issue in the combination meter where the inner machine is directly attached to the wiring board, can be reliably performed by using the outer peripheral wall of the case. it can.

According to the second aspect of the present invention, the screw hole is formed in the outer peripheral wall portion of the case in the vicinity of the positioning pin. Fixing is also possible, and it is not necessary to separately provide fixing parts.

According to the third aspect of the present invention, the case and the facing are integrated, and various internal units are mounted on the wiring board on the back side of the case. In addition to this, the Bourdon tube gauge can be assembled to the combination meter that is reduced in cost, and the combination of the Bourdon tube gauge can be realized at the same time.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a Bourdon tube gauge mounting structure of a combination meter according to the present invention.

FIG. 2 is an exploded perspective view showing details of a main part of a back side portion of FIG. 1;

FIG. 3 is a vertical sectional side view of a Bourdon tube gauge mounting structure of a conventional combination meter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 1a Look back part 1b Outer peripheral wall part 4 Wiring board 6, 7 Inner machine 8 Bourdon tube gauge 11 Fixing plate 14 Positioning hole 15 Mounting hole 16 Positioning pin 17 Screw hole 20 Screw

Claims (3)

[Claims] 1. A bourdon tube gauge mounting structure for a combination meter in which an inner machine and a bourdon tube gauge are directly mounted on a wiring board mounted on the back side of a case, wherein a positioning pin is formed on an outer peripheral wall of the case. A positioning hole formed in a fixing plate of the Bourdon tube gauge is inserted into the positioning pin, and the wiring board is overlapped and fixed on the fixing plate. 2. A screw hole is formed in the outer peripheral wall of the case in proximity to the positioning pin, and a mounting hole is formed in the fixing plate in proximity to the positioning hole. 2. The Bourdon tube gauge mounting structure for a combination meter according to claim 1, wherein the wiring board and the fixing plate are fixed to the outer peripheral wall portion via screws inserted into the holes. 3. The case has a facing portion formed integrally with a front portion of an outer peripheral wall portion. The wiring board made of a hard printed board is attached to the back side of the case. 3. The bourdon tube gauge mounting structure for a combination meter according to claim 1, wherein an inner machine and a Bourdon tube gauge are mounted.