JP2555390Y2 - Circuit board mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a circuit board which can be used in a device in which an indicator mounted on a vehicle, for example, an indicator such as a speedometer is disposed inside a case. .

[0002]

2. Description of the Related Art This type of apparatus is disclosed, for example, in
No. 53589 and Japanese Utility Model Laid-Open Publication No. 1-97215. Referring to FIG. 5, a rib-shaped first protrusion 2 protrudes outward from the peripheral surface of the case 1 on the opening side. In addition to being formed, an instrument body 3 of, for example, a speedometer as a display, and a circuit board 5 on which electronic components 4 are mounted on the bottom of the instrument body 3 are housed and arranged inside the case 1. The circuit board 5 is electrically connected to the instrument main body 3 which is an external device or an internal device (not shown). Further, in this case, the circuit board 5 has a substantially columnar board mounting portion 6 which stands up from the inner wall surface at the bottom of the case 1 with a predetermined height.
The electronic component 4 is attached and fixed to the inside of the case 1 by screws 7 so that the electronic component 4 is located in the space 8 between the bottom of the case 1 and the circuit board 5 formed by the height of the board mounting portion 6. I have.

[0003] A cover 9 is provided on the opening side of the case 1 to cover this portion. The cover 9 has a transparent material such as a transmission plate mounted on the front side thereof. Case 1 is connected to the case 1
Corresponding to the first protruding portion 2 formed on the second
The second projecting portion 10 and the first projecting portion 2 formed on the case 1 are fixed to a predetermined portion (not shown) by an attachment member such as a screw, and the dust is formed. A mounting portion 11 is provided so as to prevent intrusion of dust and dust, and a housing 12 is formed via the mounting portion 11.

[0004]

However, if the circuit board 5 is mounted inside the case 1, the circuit board 5
In order to mount the electronic component 4, a space for providing the electronic component 4 is required. Therefore, there is a problem that the thickness of the housing 12 in the vertical direction in FIG.

[0005] The present invention solves the above problem.
An object of the present invention is to provide a circuit board mounting structure capable of realizing a thinner housing by mounting a circuit board using an extra space in the housing.

[0006]

The circuit board is mounted by utilizing the extra space of the housing, so that it is not necessary to provide a space dedicated to the circuit board.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show a first embodiment of the present invention. In this embodiment, a case 1 constituting a housing 12 is shown.
And a predetermined distance from each protruding portion 2, 10 formed on the mounting portion 11 with the cover 9. In this case, the end of the circuit board 5 can be mounted and fixed to the case 1 and the cover 9, and the electronic components 4 can be stored. Substantially columnar substrate mounting portions 6a and 6b are formed upright on the outer wall surfaces of the case 1 and the cover 9 at appropriate intervals.

The circuit board 5 is supported at its center by the protruding portions 2 and 10 so that the protruding portions 2 and 10 can receive the circuit board 5 even when an external force is applied to the circuit board 5. At the same time, the both end portions are connected to the respective substrate mounting portions 6a,
And a housing 6 formed by the board mounting portion 6a and the first protruding portion 2 and the board mounting portion 6b and the second protruding portion 10 via the mounting holes 5a and 5b. An extra space on the outer wall 12 is provided as a space 8a, and the electronic component 4 mounted on the circuit board 5 is accommodated in the space 8a.

As a result, the extra space corresponding to the height of each of the projecting portions 2 and 10 formed on the case 1 and the cover 9 and the width of each of the projecting portions 2 and 10 and each of the board mounting portions 6a and 6b are provided. The space 8a is formed as
The housing 12 is made thinner by utilizing the electronic component 4 for storage.

Although not shown in this embodiment, the electrical connection between the instrument body 3 as an internal device and the circuit board 5 may be made using a flat cable or an electric cord.

In this embodiment, the circuit board 5 is attached to the upper outer wall surface of the housing 12 in FIGS. 1 and 2. The height can be appropriately set as long as it can be used for storing the electronic components 4. For example, in FIG. Mounting hole 5 in either one of
a or 5b, and this portion is
May also be provided.

Further, in this embodiment, each of the projecting portions 2 and 10 is brought into contact with the circuit board 5 so that the circuit board 5 can receive the circuit board 5 when an external force is applied. The substrate 5 and the protruding portions 2 and 10 may be provided with an appropriate space.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, a modified example of the mounting portion 11 between the case 1 and the cover 9 constituting the housing 12 is shown. The same reference numerals are given to the same or corresponding portions as those of the embodiment, and the description is omitted.

In FIG. 1, an L-shaped portion 2 a is formed by extending a tip end of a first protruding portion 2 provided on a case 1 so that a cross-sectional shape thereof is substantially L-shaped, and provided on a cover 9. The height of the second protrusion 10 to be formed is slightly lower than the height of the first protrusion 2, and the tip of the second protrusion 10 and the tip of the return member 13 are L The first protruding portion 2 and the second protruding portion 10 narrow the facing member 13 with the first protruding portion 2 and the second protruding portion 10 and fix the predetermined portion together with the facing member 13 with a screw (not shown). Even in such a case, the thickness of the housing 11 can be reduced by utilizing the extra space as in the first embodiment.

The L-shaped portion 2a formed on the first protrusion 2 may be formed on the second protrusion 10,
The first protrusion 2 and the second protrusion are formed without forming the character-shaped portion 2a.
The end faces of the distal ends of the return member 10 and the return member 13 may be formed on the same plane.
In either case, a portion protruding outward from the housing 12, that is, either the first protruding portion 2 or the second protruding portion 10 is formed on one of the case 1 and the cover 9, and the height of the protruding portion is increased. If the extra space for accommodating the electronic component 4, that is, the space portion 8a is formed by using the size, it can be appropriately determined.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, a protective cover for covering the circuit board 5 from the outside is provided.
In this case, the same reference numerals are given to the same parts as in the first and second embodiments, and the description of the overlapping parts will be omitted.

In FIG. 1, the board mounting portions 6a and 6b are formed with convex fitting projections 15 for positioning the ends of the circuit board 5 and the protective cover 14, and the fitting projections 15 are provided. The insertion hole 16 formed in the circuit board 5 is inserted through the hole, and the tip of the fitting projection 15 is fitted into a positioning fitting recess 17 formed in the protective cover 14, and is inserted through a screw hole 18. The circuit board 5 and the protective cover 14 are integrally fixed to the board attaching portions 6a and 6b by screws 7.

In this embodiment, when the protective cover 14 is attached, a thick portion 19 is formed around the fitting recess 17 so that the soldered portion of the circuit board 5 is not damaged by fixing the protective cover 14. Thus, a clearance is provided between the protective cover 14 and the circuit board 5.

As a result, the same effects as those of the first and second embodiments can be obtained, and the provision of the protective cover 14 prevents the circuit board 5 from being exposed to the outside. In addition to reducing the thickness, the circuit board 5 can be protected.

In the embodiments described so far, the case where the present invention is applied to the case 1 and the mounting portion 11 of the cover 9 has been described. In the present invention, the present invention is applied to the cover 9 and the cover 9. The present invention can also be applied to a mounting portion with a member made of a transparent material such as a transmission plate.

[0022]

According to the present invention, a housing is formed by a case in which an indicator is provided inside and a cover which covers the case, and at least one of a mounting portion of the case and the cover is outwardly provided. In a circuit board mounting structure in which a projecting portion for projecting is formed, the cover is mounted on the case via the projecting portion, and a circuit board on which electronic components are mounted is mounted on the housing. Forms a board mounting portion at a predetermined distance from the projecting portion, and allows the electronic component to be stored in a space between the outer wall surface of the housing formed by the board mounting portion and the projecting portion and the circuit board. Since the circuit board is attached, the thickness of the housing can be reduced by attaching the circuit board using the excess space of the housing.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view of FIG.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part showing a third embodiment of the present invention.

FIG. 5 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 1st projection part 2a L-shaped part 3 Instrument main body 4 Electronic component 5 Circuit board 5a, 5b Mounting hole 6a, 6b Board mounting part 7 Screw 8a Space part 9 Cover 10 Second protrusion 11 Mounting part 12 Housing 13 Returning member 14 Protective cover 15 Fitting protrusion 16 Insertion hole 17 Fitting recess 18 Screw hole 19 Thick part

Claims (1)

(57) [Scope of request for utility model registration] A housing is formed by a case in which an indicator is provided and a cover that covers the case.
At least one of the mounting portion of the case and the cover is formed with a protrusion that protrudes outward,
Attach the cover to the case via this protrusion,
In a circuit board mounting structure in which a circuit board on which electronic components are mounted is mounted on the housing, a board mounting portion is formed on the housing at a predetermined distance from the projecting portion, and the board mounting portion and the projecting portion are formed. Wherein the electronic component is provided so as to be accommodated in a space between the outer wall surface of the housing formed by the method and the circuit board.