JPH0974291A - Board holding structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board holding structure which is used in a cheap board case and capable of holding boards without producing looseness, wherein the board case is not required to be high in dimensional accuracy, in the case of housing a board in a case. SOLUTION: A board holding structure is used to fix a board 1 in a case composed of a lid 3 and a main body 2, wherein the board holding structure is composed of a support which is provided on each side of the main body 2 to support the board 1 by both the sides and a pressure part which is provided inside the main body 2 and the lid 3 to distort the board 1 by pressure and to press the board 1 against the support keeping the lid 3 fitted in the main body 2, and a first output recess with a sloping side tilted at an angle to a direction in which the board 1 is inserted is provided on the lid side of the board 1. The pressure part is provided confronting the first cutout recess, and the contacting face of the pressure part which comes into contact with the board 1 is so tapered as to recede from the board 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board holding structure for housing and holding a wiring board and the like in a case, and more particularly to a board holding structure for holding a board so that it does not rattle inside the case.

[0002]

2. Description of the Related Art FIG. 5 is a diagram for explaining a conventional substrate holding structure, in which FIG.
(B) is a side sectional view (before inserting the substrate), and (c) is a side sectional view (after inserting the substrate). Hereinafter, description will be given with reference to the drawings. 6
Is a board on which electronic components and the like are mounted and soldered. 7
Is a case main body for accommodating the substrate 6, and fitting slits 71 for sandwiching both sides 61 of the substrate 6 are provided on both inner side surfaces thereof. The case body 7 is formed such that the interval a ′ of the fitting slits 71 is larger than the width b of the board 6 near the opening and the interval a of the fitting slits 71 is smaller than the width b of the board 6 in the inner part. Has been done. In the case body 7, the width d ′ of the fitting slit 71 is close to the thickness c of the substrate 6 near the opening.
It is formed to be larger, and the interval d between the fitting slits 71 is formed to be smaller than the thickness c of the substrate 6 in the inner portion. Reference numeral 8 is a lid portion, and a fitting slit 81 for sandwiching the front side 62 of the substrate 6 is provided inside. In the lid portion 8, the width d ′ of the fitting slit 81 is larger than the thickness c of the substrate 6 near the opening, and the distance d between the fitting slits 81 is smaller than the thickness c of the substrate 6 in the inner portion. Is formed in.

Next, the substrate holding structure will be described. At the front opening of the case body 7, the spacing a ′ and the width d ′ of the fitting slit 71 are larger than the width b and the thickness c of the board, so that the board 6 can be easily inserted along the fitting slit 71. As the board 6 is inserted into the inner part of the case body 7, the spacing a and the width d of the fitting slit 71 become smaller than the width b and the thickness c of the board, but the board 6 is pressed by pressing.
Can be inserted all the way to the back. Similarly for the lid portion 8, since the width d ′ of the fitting slit 81 is larger than the thickness c of the substrate,
The board 6 can be easily inserted into the fitting slit 81. Board 6
As the lid is inserted into the inner portion of the lid portion 8, the fitting slit 8
Although the width d of 1 is smaller than the thickness c of the substrate, the substrate 6 can be inserted deeply by pressing. The lid 8 is fixed to the case body 7 by engaging means (not shown) (screw fastening, engaging with claws, etc.).

In this way, the board 6 is pressed into the fitting slit 71 of the case body 7 and the fitting slit 81 of the lid portion 8, and the board 6 is held inside the case body 7 without rattling. It

[0005]

In the above method, the workability is poor because the range in which the substrate is pressed into the case body is large and a strong force is required. In addition, the dimensions of the fitting slit portion are not easy to design, and because of the relationship with the dimensions of the board, strict precision is required. As a result, making the case is difficult and expensive.

An object of the present invention is to provide a substrate holding structure which is easy to work and has no rattling by using an inexpensive case which does not require dimensional accuracy when housing a substrate in a case body.

[0007]

To achieve the above object, the present invention provides a substrate holding structure for fixing a substrate to a case consisting of a lid and a main body, which is provided on both side surfaces of the main body. A support portion that supports both side portions of the substrate, and a pressing portion that is provided on the lid and that presses the substrate to bend it with the lid fitted to the body portion and presses the substrate against the support portion. In the substrate holding structure having, a first notch concave portion having an inclined side inclined with respect to the substrate insertion direction is provided on the lid side portion of the substrate, and the pressing portion faces the first notch concave portion. The contact surface with the substrate is provided at a position, and the tip of the contact surface is inclined in a direction of separating from the substrate.

A second cutout recess is provided on the back side of the main body of the substrate, and the second cutout is provided at a position facing the second cutout on the back side of the main body. It is characterized in that a convex portion to be engaged is provided.
Further, the second cutout concave portion has a semicircular shape, and the convex portion has a semicircular shape that is the same as or smaller than the second cutout concave portion.

[0009]

1A and 1B are views for explaining a substrate holding structure according to an embodiment of the present invention, in which FIG. 1A is a cross-sectional view as seen from above (before insertion of a substrate), and FIG. Before insertion). 2A and 2B are enlarged views of the inner part of the case main body for explaining the substrate holding structure of one embodiment of the present invention. FIG. 2A is a top view (before pressing), and FIG. ) And (c) are top views (after pressing), and (d) is a BB cross-sectional view (after pressing). FIG. 3 is an enlarged view of a lid portion for explaining a substrate holding structure of one embodiment of the present invention, (a) is a top view (before pressing),
(B) is an AA sectional view (before pressing), (c) is a top view (after pressing), and (d) is a BB sectional view (after pressing). FIG.
3A and 3B are views for explaining a substrate holding structure according to an embodiment of the present invention, in which FIG.
FIG. 9A is a cross-sectional view (after the substrate is inserted). This will be described below in detail with reference to the drawings.

Reference numeral 1 denotes a substrate on which electronic components and the like are mounted and soldered, and a trapezoidal recess 12 is provided on one side of the substrate 1 and a semicircular recess 11 on the opposite side. Reference numeral 2 denotes a case main body for accommodating the board 1, and both sides 1 of the board 1 are provided on both inner sides thereof.
A fitting slit 21 for sandwiching the members 3 and 14 is provided. In addition, the intervals L2 and L3 of the fitting slit 21 and the width t
2 and t3 are larger than the thickness t1 and the width L1 of the board so that the board 1 can be easily inserted into the case body 2 even in the vicinity of the opening and the back of the case body 2. In addition, a semi-cylindrical protrusion 22 that engages with the semi-circular recess 11 of the substrate 1 is formed on the inner surface of the back of the case body 2, and an upper surface 1 a of the substrate 1 that is inserted above the semi-cylindrical protrusion 22 is provided. A protrusion 23 is provided having a contacting inclined lower surface 23a. In this example, the semi-cylindrical projection 22 and the projection 23 having an inclined lower surface 23a are integrated, but they may be separate bodies. Reference numeral 3 denotes a lid portion, which is provided with a protrusion 31 having an inclined lower surface 31a that comes into contact with the upper surface 1a of the substrate 1 inserted into the inner surface.
When the substrate 1 is inserted, the lower side surface portion 31 of the protrusion 31
The inclined portion 12a of the trapezoidal concave portion 12 of the substrate 1 comes into contact with b. In addition, the semicircular concave portion 1 of the substrate
1, the trapezoidal recess 12, the semi-cylindrical projection 22, the projection 23, and the projection 31 of the case body 2 may be any number.

First, the storage of the substrate in the case body will be described with reference to the enlarged view of FIG. Substrate 1 is a semicircular recess 1
1 is inserted in the inner side along a fitting slit (not shown) of the case body 2. At this time, the gap between the fitting slits is larger than the width and thickness of the substrate. Therefore, the substrate 1 can be easily inserted into the case body 2. When the board 1 is inserted into the inner part of the case body 2, the tip of the board 1 comes into contact with the inclined lower surface 23 a of the projection 23 and stops. In this state, the semicircular concave portion 11 of the substrate 1 is close to the semicylindrical projection 22 provided on the inner surface of the case body 2, but they are not in contact with each other yet (FIG. 2 (a)). , (B)).

Furthermore, the substrate 1 is pressed and the case body 2 is pressed.
At the same time, the substrate 1 is pushed downward (in the direction of the arrow) by the inclined lower surface 23a of the protrusion 23 in the inner portion of the case body 2. Since both sides of the board 1 are sandwiched by the fitting slits, the board 1 bends downward with the fitting slits on both sides as fulcrums. The semi-circular recess 11 of the substrate 1 and the cylindrical protrusion 22 of the case body 2 come into contact with each other and stop. This time,
The radius R1 of the semicircular recess 11 of the substrate 1 is set to be equal to or larger than the radius R2 of the semicylindrical protrusion 22 of the case body 2, so that the semicircular recess 11 of the substrate 1 can be easily fitted. Since the center line and the center line of the semi-cylindrical projection 22 of the case body 2 coincide with each other, they are in contact at only one point. In this way, the position of the substrate 1 with respect to the case body 2 is determined (see FIGS. 2C and 2D).

Next, attachment of the lid will be described with reference to an enlarged view of FIG. After the board 1 is inserted into the case body,
The lid 3 is attached to the case body 2. At this time, at the rear end portion of the substrate 1 (the side having the trapezoidal recess 12), the lid portion 3
The inclined lower surface 31a of the projection 31 contacts the upper surface 1a of the trapezoidal concave portion 12 of the substrate 1, and the lower side surface portion 31b of the projection 31 contacts the inclined portion 12a of the trapezoidal concave portion 12 of the substrate 1. It stops (see FIGS. 3 (a) and 3 (b)).

Further, when the substrate 1 is pressed by the lid portion 3, the lid portion 3 and the case body 2 are completely fitted, and the substrate 1 is pushed downward by the inclined lower surface 31a of the protrusion 31 of the lid portion 3. . As a result, the substrate 1 bends downward with the fitting slits on both sides of the case body as fulcrums. At the same time, the protrusion 31
Both lower side surface portions 31b press the inclined portion 12a of the trapezoidal recess 12 of the substrate 1. (See FIGS. 3C and 3D).

In this way, the upper surface 1a of the substrate 1 is pushed downward by the inclined lower surface 23a of the protrusion 23 of the case body 2 and the inclined lower surface 31a of the protrusion 31 of the lid portion 3 to bend the substrate 1 downward. , Its elasticity makes the substrate 1 the case body 2
It is fixed without rattling inside. At the same time, the substrate 1 has a semi-circular recess 11 and a semi-cylindrical projection 22 of the case body 2.
, And the board 1 is engaged with the trapezoidal recess 12 and the trapezoidal projection 31 of the lid 3 so that the position of the board 1 in the insertion direction and the width direction is fixed. It is held inside the 2 without rattling. The lid 3 is fixed to the case body 2 by an engaging means (not shown) (screw fastening, engaging with claws, etc.).

As described above, in this embodiment, since the precision of the fitting slit of the case body for accommodating the substrate is not required, the substrate can be easily inserted and the case can be manufactured at low cost. Moreover, the substrate can be stored in the case body without rattling.

[0017]

As described above, according to the present invention, it is possible to provide a substrate holding structure with an inexpensive case which does not require dimensional accuracy when the substrate is housed in the case body.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a substrate holding structure according to an embodiment of the present invention, in which (a) is a cross-sectional top view (before substrate insertion),
(B) is a sectional view taken on line AA (before insertion of the substrate).

2A and 2B are enlarged views of the inner part of the case main body for explaining the substrate holding structure of one embodiment of the present invention, in which FIG. 2A is a top view (before pressing), and FIG. Before), (c) is a top view (after pressing), and (d) is a BB sectional view (after pressing).

FIG. 3 is an enlarged view of a lid portion for explaining a substrate holding structure of one embodiment of the present invention, (a) is a top view (before pressing),
(B) is an AA sectional view (before pressing), (c) is a top view (after pressing), and (d) is a BB sectional view (after pressing).

FIG. 4 is a diagram for explaining a substrate holding structure according to an embodiment of the present invention, in which (a) is a cross-sectional top view (after insertion of the substrate),
(B) is a sectional view taken on line AA (after the substrate is inserted).

FIG. 5 is a diagram for explaining a conventional substrate holding structure,
(A) is a top view sectional view (before board insertion), (b) is a side sectional view (before board insertion), and (c) is a side sectional view (after board insertion).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Substrate 21 ... Fitting slit 2 ... Case main body 22 ... Semi-cylindrical projection 3 ... Lid 23 ... Trapezoidal projection 11 ... Semi-circular recess 31 ... Trapezoidal projection 12 ... Trapezoidal recess

Claims (3)

[Claims] 1. A substrate holding structure for fixing a substrate to a case composed of a lid and a main body, wherein support portions provided on both side surfaces of the main body portion and supporting both side portions of the substrate, the back portion of the main body portion. A substrate holding structure having a pressing portion that is provided on a side and the lid, presses and bends the substrate with the lid fitted to the main body, and presses the substrate against the supporting portion. A first notch recess having an inclined side inclined with respect to the substrate insertion direction is provided on the lid side part of the substrate, and the pressing part is provided at a position facing the first notch recess and The substrate holding structure is characterized in that the contact surface has a tip inclined in a direction in which it is separated from the substrate. 2. The back side of the main body of the substrate,
The 2nd notch crevice is provided, and the convex part which engages with the 2nd notch crevice is provided in a position which counters the 2nd notch crevice on the back side of the body part. Substrate holding structure. 3. The substrate holding structure according to claim 1, wherein the second cutout recess has a semicircular shape, and the protrusion has a semicircular shape that is the same as or smaller than the second cutout recess. .