JP2583978Y2 - Structure of storage housing for circuit board - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a housing for a circuit board.

[0002]

2. Description of the Related Art Conventionally, as this kind of technique, for example, there is a technique disclosed in Japanese Utility Model Publication No. 1-109944. In this technique, the circuit board is fixed by a support surface of a lid and a board locking piece, and the board locking piece of the lid is engaged with an assembly locking piece of a case to prevent the circuit board from falling off. It is to prevent. The circuit board has its periphery sandwiched between the open ends of the lid and the case, and an F plug is provided at the center. The F plug protrudes from the center of the upper surface of the case.

[0003]

However, the prior art described above has a structure in which the circuit board is sandwiched between the support surface, the board locking piece, and the side wall. However, the circuit board tends to rattle due to dimensional errors and the like. There is a problem. Further, in the related art, the periphery of a circuit board is sandwiched between an opening end of a lid and an opening end of a case, and the circuit board is connected to another electric circuit by an F plug at the center. For this reason, the prior art is:
It has been difficult to connect an electric circuit having a large number of terminals, and the range of use has been limited.

[0004]

SUMMARY OF THE INVENTION A circuit board fixing structure according to the present invention has been devised in order to solve the above-mentioned problems of the prior art, and has a case having an opening and closing the opening. In a housing housing for a circuit board including a lid and a circuit board provided in a housing including the lid and the case, the case has a groove formed in an inner wall thereof for inserting the circuit board. The lid includes a connector having a long hole formed in the inner bottom, a support groove formed in a side wall, and an elastic piece for locking the circuit board. The circuit board is provided with a terminal installed to be inserted into the long hole. Comprising a piece.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a housing for a circuit board according to the present invention; FIG. Reference numeral 1 denotes a resin case in which a substrate holder 2b of a lid 2 is fitted into an opening 1a. The opening end of the opening 1a is formed in a vertically different level to prevent the case 1 and the lid 2 from being fitted upside down. Case 1 is:
Groove 1 formed of two rail-shaped projections 1c on left and right inner walls 1b
d is formed. The rail-shaped protrusion 1c is for holding the circuit board 3 inserted in the case 1, and forms an inclined surface 1e on the inner surface on the opening 1a side. The rail-shaped protrusion 1c may have a shape other than the protrusion shape as long as it forms the groove 1d. For example, the groove 1d may be formed in the inner wall 1b of the case 1. Case 1
Has a hole 1f formed in the side wall of the opening 1a so as to fit into the projection 2a of the lid 2. The hole 1f of the case 1 and the projection 2a of the lid 2 may be formed opposite to each other.

The lid 2 and the case 1 constitute a housing for the circuit board 3. The lid 2 has an opening 1 on one side.
a, a cylindrical board holder 2b to be inserted into the circuit board 3 and an elastic piece 2c to be engaged with the circuit board 3; a connector 2d at the other side; It has a boundary wall 21 having a long hole 2e. Substrate holder 2
b, the convex portion 2a, the left and right side walls 2
m, the support groove 2f in which the circuit board 3 engages, the side wall 2m
The elastic pieces 2c are formed at left and right end portions of the elastic member. Elastic piece 2
c is formed continuously with the rail-shaped projection 2j constituting the support groove 2f. The elastic piece 2c has a claw 2g which is engaged with a projecting piece 3a formed on both sides of the circuit board 3, and a cutout groove 2h which is engaged with the projecting piece 3a. The notch groove 2h has a claw 2g.
It is located next to.

[0007] The connector 2d is for electrical connection to the mating connector, and has an elongated hole 2e penetrating into the substrate holder 2b in the inner bottom boundary wall 21. Slot 2e
Consists of two holes drilled on the left and right of the positioning column 2k. Support groove 2f, long hole 2e, and groove 1d of case 1
Are formed on the same plane, and the circuit board 3 is inserted. The support groove 2f forms a slope 2i on the inner surface on the claw 2g side. The rail-shaped protrusion 2j does not have to be a protrusion as long as it forms the support groove 2f. For example, the support groove 2f may be formed in the side wall 2m of the substrate holder 2b of the lid 2.

[0008] The circuit board 3 is composed of a printed board or the like.
It has electrical components (not shown). The circuit board 3 has a connector 2 d inserted therethrough through the protruding piece 3 a and the elongated hole 2 e.
A terminal setting piece 3b disposed therebetween is formed. The terminal installation piece 3b has a plurality of terminals 3c printed on the upper and lower surfaces and arranged side by side. 3d is a slit with which the positioning column 2k is engaged. The slit 3d serves to position the terminal installation piece 3b at a predetermined position in the connector 2d so that the terminal 3c is accurately connected to a connection terminal (not shown) of the mating connector. Circuit board 3 is connector 2d
It has the function of preventing the device from being installed upside down.

The structure of the circuit board storage housing according to the present invention has the above-described structure. Next, the operation will be described in detail together with the assembling procedure. First, both sides of the circuit board 3 are covered with the lid members 2.
And the terminal installation piece 3b is inserted into the elongated hole 2e. At this time, the circuit board 3 is
Has an inclined surface 2i at the end thereof, and is guided by the inclined surface 2i to be smoothly inserted into the support groove 2f. The terminal mounting piece 3b of the circuit board 3 has the elongated hole 2e formed on the same plane as the support groove 2f, so that when the circuit board 3 is inserted into the support groove 2f, it is guided by the support groove 2f, and Insert smoothly into hole 2e. The circuit board 3 connects the terminal installation piece 3b to the connector 2d by fitting the slit 3d into the positioning column 2k.
And to prevent the circuit board 3 from being placed upside down. The projecting piece 3a of the circuit board 3 is pressed against the claw 2g to bend the elastic piece 2c outward, and the projecting piece 3a is engaged with the notch groove 2h.

As a result, the circuit board 3 is fixed to the lid 2. The circuit board 3 has both sides in the support grooves 2f, the terminal installation pieces 3b in the long holes 2e, the slits 3d in the positioning columns 2k,
By inserting each of them and locking the protruding pieces 3a with the claws 2g, they are fixed to the lid 2 without play.

Since the lid 2 has the connector 2d and the circuit board 3 is fixed, when the circuit board 3 is assembled to the lid 2, the mating connector is fitted to the connector 2d and the circuit board 3 is fixed. Can be checked. For this reason, the circuit board 3 is
Before assembling to the lid 2, the electric circuit can be checked.
At the time of inspection, the work of attaching and detaching the case 1 and the lid 2 is not required, which is convenient.

Next, the opening 1a of the case 1 is inserted into the board holder 2b, and both sides of the circuit board 3 are inserted into the grooves 1d. Since the circuit board 3 has the slope 1e at the end of the groove 1d, the circuit board 3 is guided by the slope 1e and is smoothly inserted into the groove 1d. When the opening 1a of the case 1 matches the substrate holder 2b of the lid 2, the projection 2a engages with the hole 1f. The elastic piece 2c is arranged adjacent to the inner wall 1b of the case 1. Since the elastic piece 2c prevents the outward bending from being caused by the inner wall 1b of the case 1, the protrusion 3a is prevented from coming off from the claw 2g. Also, the circuit board 3
Is inserted into the groove 1d in the case 1 to prevent backlash.

[0013]

The structure of the housing for the circuit board according to the present invention has the following effects. (1) Since the circuit board is held by the groove of the case and the support groove of the lid, rattling of the circuit board can be eliminated. (2) Since the terminal installation pieces are formed on the circuit board and the terminal installation pieces are inserted into the connector of the lid, electrical connection of a large number of terminals can be easily performed. (3) Since the lid has a connector having a long hole, a support groove, and an elastic piece, and the circuit board can be held by the lid alone, the mating connector must be connected before the case is assembled to the lid. The circuit board can be inspected conveniently by fitting to the connector.

[Brief description of the drawings]

FIG. 1 is a plan view with a cross section showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a perspective view showing a preferred embodiment of the present invention, which has a partial cross section when a lid is attached to a case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 1a Opening 1b Inner wall 1d Groove 2 Lid 2c Elastic piece 2d Connector 2e Long hole 2f Support groove 2m Side wall 3 Circuit board 3b Terminal installation piece

Claims (1)

(57) [Scope of request for utility model registration] 1. A housing for a circuit board, comprising: a case having an opening; a lid for closing the opening; and a circuit board provided in a housing including the lid and the case. The case has a groove formed in an inner wall thereof for inserting the circuit board, and the lid has a connector having a long hole formed in an inner bottom, a support groove formed in a side wall, and an elasticity for locking the circuit board. A circuit board storage housing, wherein the circuit board includes a terminal installation piece inserted into the elongated hole.