JPH09321462A - Electronic circuit device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a connector mounted on an electronic circuit board from being moved by a method wherein threaded holes are provided in the lower side surfaces of the connector, a projected stripe along the longitudinal direction of the connector is provided on the upper side surface of the connector and with the projected strip engaged by insertion between one pair of projections, the connector is fixed on the circuit board using the threaded holes. SOLUTION: One pair of proiections 20 for external force receiving use, which are provided integrally with an upper case 1, are arranged in parallel to each other in the inside of the upper wall surface of a case 1 and at the same time, have a length longer than the width of a connector 8. Moreover, the width on the sides of the short sides of a projected stripe 21, which is provided integrally with the connector 8 on the upper side surface of the connector 8, is set in some smallish than the interval between the one pair of the projections 20 and this projected stripe 21 is engaged by insertion between the projections 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic circuit device in which an external connection connector is mounted on an electronic circuit board and the electronic circuit board is housed in a case.

[0002]

2. Description of the Related Art An electronic circuit device of this type is shown in FIG.
(Y sectional view) and FIG. Reference numeral 1 denotes an upper case, and one side surface of the lower surface side and the standing side surface is opened to form openings 2 and 3, and the opening 2
And 3 are continuously formed. Around the opening 2 on the lower surface side of the upper case 1, a mounting flange portion 4 is formed outward, and a mounting hole 4a is formed in the mounting flange portion 4.

Further, the upper wall surface 1 of the upper case 1
A boss portion 1b having the same height is provided at four inner corners of the a, and the electronic circuit board 5 is attached to the boss portion 1b from the lower side by the screw 5a.
The electronic circuit board 5 is provided with electronic components such as the acceleration switch 7 and the like. A connector 8 that is fitted to a mating portion with a mating connector (not shown) is fitted into the opening 3 on one side surface of the upper case 1 with a screw 6. Also,
The lead terminals 8a of the connector 8 are soldered to the electronic circuit board 5.

Reference numeral 9 denotes a plate-shaped lower case, which closes the entire lower surface side opening 2 of the upper case 1 and the other side opening 3 except the portion where the connector 8 is located. It is formed and its four corners are screwed to the upper case 1.

[0005]

However, in the above-mentioned structure, the connector 8 is attached to the electronic circuit board 5 by screwing with the screw 6 and soldering the lead terminal 8a. Therefore, when the connector 8 is large, a very large force is required at the time of fitting. Therefore, when the mating connector is inserted from the X direction, the upper and lower side surfaces of the connector 8 However, since it does not hit the opening edge of the opening 3 of the upper case 1, that is, there is the gap 11, a force is generated in the upward or downward direction with respect to the connector 8, and the screwed portion of the connector 8 or soldering is applied. There is a risk that the electronic circuit board 5 may be damaged because stress is generated in the part and unless the electronic circuit board 5 having sufficient strength is used.

Therefore, the present invention has been made in view of the above problems, and improves the reliability of the electronic circuit device by preventing the connector attached to the electronic circuit board from hitting the case side when the connector is fitted. The purpose is to let.

[0007]

According to a first aspect of the present invention, there is provided an electronic circuit device comprising an electronic circuit board having an external circuit connecting connector attached to a peripheral portion thereof, the electronic circuit substrate being housed in a case. A thread having a screw hole on the lower side surface of the connector, a ridge extending along the longitudinal direction on the upper side surface, and a width slightly larger than the width of the ridge provided on the upper wall surface of the case. The groove is provided, the protrusion is engaged in the groove, and the connector is fixed to the electronic circuit board by using a screw hole.

A second invention relating to this electronic circuit device is an electronic circuit device in which an electronic circuit board having an external circuit connecting connector attached to a peripheral portion is housed in a case. A pair of holes provided with a convex strip along the longitudinal direction on the upper side surface, and the convex strip provided on the upper wall surface of the case with a space slightly larger than the width of the convex strip. The projection is provided, the projection is inserted between the pair of projections, and the connector is fixed to the electronic circuit board by using a screw hole.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. The first embodiment according to the present invention will be described with reference to FIG. 1 (YY sectional view of FIG. 2) and FIG.
2 and FIG. 2, the same components as those described in FIGS. 5 and 6 or their equivalents are denoted by the same reference numerals, and the description thereof will be omitted. Only different portions will be described below. .

That is, in FIGS. 1 and 2, reference numeral 20 denotes a pair of external force receiving projections provided integrally with the upper case 1 inside the upper wall surface 1a of the case 1 and arranged in parallel. It has a length equal to or larger than the width of the connector 8. Reference numeral 21 shown in FIG. 4 is a ridge formed integrally with the connector 8 on the upper side surface of the connector 8, and the width of its short side is slightly smaller than the interval between the pair of external force receiving projections 20. The projection 21 is set between the pair of external force receiving projections 20.

In the above structure, as shown in FIG. 3, when the mating connector is fitted into the connector 8 in the X direction, the one side surface 21a of the ridge 21 remains even if the connector 8 is displaced from the solid line state to the broken line state. Since the external force receiving projection 20 is brought into contact with one side surface 20a opposite to the one side surface 21a to restrict further displacement of the connector 8, the connector 8 is screwed to the electronic circuit board 5 and soldered. No external force is applied to the parts to protect them from damage.

In the above-described embodiment, the upper case 1 is provided with the pair of external force receiving projections 20, but the upper wall surface 1 of the upper case 1 is replaced with the external force receiving projections 20.
It goes without saying that a groove may be provided in a with a width slightly larger than the width of the short side of the projection 21.

[0013]

As described above, according to the present invention, it is possible to enhance the fixing strength of the connector.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view of an electronic circuit device according to the present invention.

FIG. 2 is a bottom view showing the electronic circuit device of FIG. 1 seen from the bottom side.

FIG. 3 is a perspective view of the connector 8 of FIGS. 1 and 2.

FIG. 4 is an explanatory view of a main part for explaining the operation of the present invention.

FIG. 5 is a cross-sectional explanatory view of a conventional electronic circuit device.

6 is a bottom view showing the electronic circuit device of FIG. 5 viewed from the bottom side.

[Explanation of symbols]

 1 Upper case 1b Boss part 4 Collar part 5 Electronic circuit board 7 Acceleration switch 8 Connector 9 Lower case 20 External force receiving projection 21 Convex strip

Claims (2)

[Claims] 1. An electronic circuit device in which an electronic circuit board having an external circuit connecting connector attached to a peripheral portion is housed in a case, wherein a screw hole is provided on a lower side surface of the connector and a longitudinal direction is provided on an upper side surface. And a groove having a width slightly larger than the width of the ridge provided on the upper wall surface of the case, and the ridge is inserted into the groove. At the same time, the electronic circuit device is characterized in that the connector is fixed to an electronic circuit board by using screw holes. 2. An electronic circuit device comprising an electronic circuit board having a peripheral portion to which an external circuit connecting connector is attached, the electronic circuit device having a screw hole on the lower side surface of the connector and a longitudinal direction on the upper side surface. And a pair of protrusions provided opposite to each other with a space slightly larger than the width of the protrusion provided on the upper wall surface of the case. An electronic circuit device characterized in that the ridge is inserted between the connector and the connector is fixed to an electronic circuit board by using a screw hole.