JPH077184U - Circuit board housing structure - Google Patents

Abstract

(57) [Abstract] [Purpose] The circuit board is inserted into the groove of the case and the support groove of the lid to eliminate rattling of the circuit board. [Constitution] In the case 1, a groove 1d is formed on an inner wall 1b.
The lid 2 has a connector 2d having a long hole 2e formed in the inner bottom,
It has a support groove 2f formed in the side wall 2m and an elastic piece 2c with which the circuit board 3 is locked. The circuit board 3 has a terminal installation piece 3b that is inserted into the elongated hole 2e. The side surface of the circuit board 3 is inserted into the support groove 2f, the terminal installation piece 3b is inserted into the elongated hole 2e, and the circuit board 3 is fixed to the lid body 2 with the elastic piece 2c. Further, the circuit board 3 has a groove 1d.
And the lid 2 is inserted into the case 1 and fixed in the housing formed of the lid 2 and the case 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a housing for a circuit board.

[0002]

[Prior art]

 Conventionally, as this type of technology, for example, there is a technology disclosed in Japanese Utility Model Publication No. 1-10944. In this technique, the circuit board is fixed by the bearing surface of the lid and the board locking piece, and the board locking piece of the lid is engaged with the assembly locking piece of the case to prevent the circuit board from falling off. To prevent. The circuit board has its periphery sandwiched between the opening ends of the lid and the case, and the F connector is arranged in the center. The F plug is protruding from the center of the upper surface of the case.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned conventional technique has a structure in which the circuit board is sandwiched between the bearing surface, the board locking piece, and the side wall, but there is a problem that the circuit board is easily rattled due to dimensional errors or the like. Further, in the conventional technique, the periphery of the circuit board is sandwiched between the opening end of the lid and the opening end of the case, and the circuit board is connected to another electric circuit by an F plug at the center. For this reason, in the conventional technique, it is difficult to connect an electric circuit having a large number of terminals, and the use range is limited.

[0004]

[Means for Solving the Problems]

 The 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 includes a case having an opening, a lid for closing the opening, the lid and the In a housing for storing a circuit board including a circuit board provided in a housing including a case, the case has a groove formed in the inner wall for inserting the circuit board, and the lid body has a long hole on the inner bottom. The connector is provided with a hole, a support groove formed in the side wall, and an elastic piece with which the circuit board is locked, and the circuit board is provided with a terminal installation piece that is inserted into the elongated hole.

[0005]

【Example】

 Hereinafter, one embodiment of the structure of the circuit board housing according to the present invention will be described in detail with reference to FIGS. 1, 2 and 3. Reference numeral 1 denotes a resin case, in which the substrate holder 2b of the lid body 2 is fitted in the opening 1a. The opening end of the opening 1a is formed in a stepped manner to prevent the case 1 and the lid 2 from being fitted upside down. The case 1 has a groove 1d formed of two rail-shaped protrusions 1c on the left and right inner walls 1b. The rail-shaped projection 1c is for holding the circuit board 3 inserted in the case 1, and has an inclined surface 1e formed on the inner surface on the side of the opening 1a. The rail-shaped protrusion 1c may have a shape other than the protrusion 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. The case 1 has a hole 1f formed in the side wall of the opening 1a so as to be fitted into the protrusion 2a of the lid 2. The hole 1f of the case 1 and the convex portion 2a of the lid body 2 may be formed opposite to each other.

The cover 2 and the case 1 form a housing for housing the circuit board 3. The lid 2 has, on one side, a tubular substrate holder 2b that is fitted into the opening 1a and an elastic piece 2c that engages with the circuit board 3, and has a connector 2d on the other side and a circuit at the center. It has a boundary wall 2l having a long hole 2e through which the terminal installation piece 3b of the substrate 3 is inserted. The board holder 2b has the projections 2a on the outer surfaces of the left and right side walls 2m, the support grooves 2f with which the circuit board 3 is engaged on the inner surfaces of the left and right side walls 2m, and the elastic pieces 2c on the left and right ends of the side walls 2m. The elastic piece 2c is formed continuously with the rail-shaped projection 2j forming the support groove 2f. The elastic piece 2c has a claw 2g that engages with a protruding piece 3a formed on both sides of the circuit board 3 and a cutout groove 2h that engages with the protruding piece 3a. The cutout groove 2h is provided adjacent to the claw 2g.

The connector 2d is to be electrically connected to the mating connector, and has a long hole 2e communicating with the inside of the substrate holder 2b in the boundary wall 2l at the inner bottom. The long hole 2e is composed of two holes formed on the left and right of the positioning column 2k. The support groove 2f, the long hole 2e, and the groove 1d of the case 1 are formed on the same plane, and the circuit board 3 is inserted therein. The support groove 2f has an inclined surface 2i formed on the inner surface on the claw 2g side. The rail-shaped protrusion 2j does not have to have a protrusion shape as long as it forms the support groove 2f. For example, the supporting groove 2f may be formed in the side wall 2m of the substrate holder 2b of the lid body 2.

The circuit board 3 is made of a printed board or the like and has electric parts (not shown). The circuit board 3 has, around its periphery, the projecting piece 3a and a terminal setting piece 3b which is inserted through the elongated hole 2e and arranged between the connectors 2d. A plurality of terminals 3c are printed on the upper and lower surfaces of the terminal installation piece 3b and are arranged side by side. 3d is a slit with which the positioning post 2k is engaged. The slit 3d serves to align the terminal installation piece 3b at a predetermined position in the connector 2d so that the terminal 3c is accurately connected to the connection terminal (not shown) of the mating connector, and the mating connector, Also, it has a role of preventing the circuit board 3 from being installed on the connector 2d in the opposite direction.

The structure of the housing for housing the circuit board according to the present invention is configured as described above. Next, the operation will be described in detail together with the assembling procedure. First, both sides of the circuit board 3 are inserted into the support grooves 2f of the lid member 2, and the terminal installation pieces 3b are inserted into the elongated holes 2e. At this time, since the circuit board 3 has the slope 2i at the end of the support groove 2f, the circuit board 3 is guided by the slope 2i and smoothly inserted into the support groove 2f. The terminal installation piece 3b of the circuit board 3 has the elongated hole 2e formed on the same plane as the support groove 2f. Therefore, when the circuit board 3 is inserted into the support groove 2f, it is guided by the support groove 2f. Insert smoothly into hole 2e. The slit 3d of the circuit board 3 is fitted into the positioning post 2k to position the terminal installation piece 3b at a desired position of the connector 2d and prevent the circuit board 3 from being placed upside down. Then, in the circuit board 3, the projecting piece 3a presses the claw 2g to bend the elastic piece 2c outward, and the projecting piece 3a engages with the notch groove 2h.

As a result, the circuit board 3 is fixed to the lid body 2. The circuit board 3 is inserted into the support groove 2f on both sides, the terminal installation piece 3b into the elongated hole 2e, the slit 3d into the positioning column 2k, and the projecting piece 3a is locked by the claw 2g. It is fixed to the lid 2 without backlash.

Since the lid body 2 has the connector 2d and the circuit board 3 is fixed, when the circuit board 3 is assembled to the lid body 2, the mating connector is fitted into the connector 2d and the circuit board 3 is attached. Can be inspected. For this reason, the circuit board 3 can be inspected for an electric circuit before the case 1 is assembled to the lid body 2, so that the case 1 and the lid body 2 need not be attached or detached at the time of inspection, 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 smoothly inserted into the groove 1d. When the opening 1a of the case 1 is aligned with the substrate holder 2b of the lid 2, the protrusion 2a is engaged with the hole 1f. The elastic piece 2c is arranged adjacent to the inner wall 1b of the case 1. The elastic piece 2c prevents the elastic piece 2c from bending outward by the inner wall 1b of the case 1, and thus prevents the protruding piece 3a from coming off from the claw 2g. Further, the circuit board 3 is inserted into the groove 1d in the case 1 to prevent backlash.

[0013]

[Effect of device]

 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, it is possible to eliminate rattling of the circuit board. (2) Since the terminal installation piece is formed on the circuit board and the terminal installation piece is inserted into the connector of the lid body, electrical connection of a large number of terminals can be facilitated. (3) The lid has the connector having the elongated hole, the support groove, and the elastic piece, and the circuit board can be held only by the lid. Therefore, before the case is assembled to the lid, the mating connector It is convenient because you can check the circuit board by fitting the to the connector.

[Brief description of 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.

FIG. 3 is a view showing a preferred embodiment of the present invention and is a perspective view having a partial cross section when a lid is assembled to a case.

[Explanation 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)

[Scope of utility model registration request] 1. A housing for housing a circuit board, comprising: a case having an opening; a lid that closes the opening; and a circuit board provided in a housing formed by the lid and the case. The case has an inner wall formed with a groove into which the circuit board is inserted, and the lid body has a connector having a long hole formed in the inner bottom thereof, a support groove formed in the side wall, and an elastic member for locking the circuit board. And a terminal mounting piece that is inserted into the elongated hole, the structure of the housing for housing the circuit board.