JPH08145018A - Structure for fixing planar article in case - Google Patents

Abstract

PURPOSE: To insert a planar article in a case with a small insertion force and to fix the same therein without rattling. CONSTITUTION: A printed board 1 is inserted in a case body 2, being fitted at its left and right edges in guide grooves 6 formed in side panels 5 of the casing body 2. A pair of triangular protrusions 9 are formed on the side edges of the printed board 1 at predetermined positions, each being projected outward and having a right-angle edge 9a serving as a mark. When the printed board 1 is inserted in the casing body 2, tapered edges 9b of the protrusions 9 are pushed being resiliently widened, corresponding to opening edges 2a of the left and right side panels 5 just before the printed board reaches the inward end. Accordingly, the printed circuit board 1 is clamped and secured by the left and right restoring forces of the side panels 5 which are exerted laterally. If the printed board 1 is regularly inserted, the right angle edges 9a of the protrusions 9 serving as a mark are aligned with the opening edges 2a of the case body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing and accommodating a plate-like article such as a printed circuit board in a case.

[0002]

2. Description of the Related Art As an example of a structure in which a printed circuit board is housed in a resin case to form a unit, a structure as shown in FIG. 4 is known. The resin case includes a main body case a whose one surface is open, and a lid case b which is attached to the opening surface. Guide grooves c are formed in the left and right inner side surfaces of the body case a along the length direction. Then, the left and right side edges of the printed circuit board d are fitted into the guide grooves c and inserted along the guide grooves c to be housed in the main body case a, and then the lid case b is fitted and assembled as a unit.

By the way, in the resin case as described above, it is difficult to tightly store the printed circuit board d in the main body case a because distortion or dimensional error occurs during molding. Therefore, when the unit is mounted on a vehicle, there is a problem that the printed circuit board d rattles inside due to the vibration thereof and an unpleasant noise is generated.

Therefore, conventionally, as shown in the same figure, a tapered pressure portion e is formed at the inner end of the guide groove c so as to gradually project inward, and the printed circuit board d is pushed between the pressure portions e. As a result, rattling of the printed circuit board d has been suppressed.

[0005]

However, in the conventional method, since the pressing portion e is formed in the back of the main body case a and the rigidity is high, the printed circuit board d is not so wide as to expand the pressing portion e. It is pushed in like a shaving and requires considerable force to insert. Further, when the printed circuit board d is inserted into the printed circuit board d with a large resistance, the pressing process is terminated halfway and the printed circuit board d is not completely inserted until the cover case b is covered. The complicated work of pushing d is forced, and there is a drawback that the work efficiency is poor.

The present invention has been completed in view of the above circumstances, and it is possible to insert a plate-like article into a case with a small insertion force and fix the article in the case without rattling. To aim.

[0007]

As a means for achieving the above object, the invention of claim 1 is provided with a plate-shaped article and a case whose one surface is open, and the left and right side edges of the plate-shaped article are provided. A case-like fixing structure for a plate-like article, wherein the plate-like article is fixedly housed in the case by being fitted and inserted between the left and right inner side surfaces of the case, and a side edge of the plate-like article is provided. The present invention is characterized in that at least one of the inner side surfaces of the case is provided with a protrusion that functions to clamp the side edge of the plate-like article while the side surface of the case expands and deforms. .

A second aspect of the invention is characterized in that, in the first aspect of the invention, the protrusion is provided at a position on the opening surface side of the case where the expansion deformation is possible.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the protrusion is provided on a side edge of the plate-like article, and the protrusion inserts the plate-like article to a predetermined position in the case. The feature is that the structure also serves as a mark for confirming whether or not it has been performed.

[0010]

According to the first aspect of the present invention, when the plate-shaped article is inserted into the case, the projection expands the side surface of the case, and the reaction force presses the both side edges of the plate-shaped article. It is fixedly stored in the case without rattling.

According to the second aspect of the invention, the plate-like article is inserted while widening the opening surface side of the case where the case is the most spreadable and deformable. In the invention of claim 3, the insertion position is confirmed by looking at the protrusion of the inserted plate-like article.

[0012]

According to the first aspect of the present invention, when the plate-like article is fixed in the case without rattling, the plate-like article is pushed while expanding and deforming the side surface of the case. The force required for expanding and deforming the side plate can be small compared to, for example, the case where the side plate is pushed in so as to be scraped, so that the force required for inserting the plate-shaped article can be suppressed to a low level, thereby improving the work efficiency. There is an effect that can be greatly improved.

According to the second aspect of the invention, since the case is expanded and deformed on the side of the opening having the lowest rigidity, the insertion force of the plate-like article is suppressed to the minimum, and the work efficiency is further improved. There is an effect that can be achieved. Further, according to the invention of claim 3, it is possible to easily and accurately confirm whether or not the plate-like article has been inserted up to the proper position in the case by merely visually observing the position of the protrusion. is there.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, as shown in FIG. 1, a printed circuit board 1, a main body case 2 and a lid case 3 are provided. Although not shown in the drawing, various electronic components such as an IC and a capacitor and a connector are attached to the printed circuit board 1.

The body case 2 and the lid case 3 are each made of a synthetic resin material. The main body case 2 is in the form of a rectangular parallelepiped having an open front surface, and has a depth capable of accommodating most of the printed circuit board 1 in the lengthwise direction. Guide grooves 6 are formed on the inner surfaces of the left and right side plates 5 of the main body case 2 so as to fit the left and right side edges of the printed circuit board 1 and guide the insertion of the printed circuit board 1. It should be noted that, of the upper and lower side walls 7, 7 forming each guide groove 6, the opening edge side of the upper side wall 7 is notched by a certain size. This is because when the tip of the printed board 1 is fitted into the guide groove 6, the printed board 1 can be inserted even in a tilted position to facilitate the insertion work.

The one lid case 3 is attached so as to abut against the opening surface of the main body case 2, and the portion protruding from the opening surface of the printed circuit board 1 housed in the main body case 2. And is coupled to the main body case 2 by a locking means (not shown).

Now, on the left and right side edges of the printed circuit board 1,
As shown in FIG. 3, a pair of protrusions 9 is formed so as to have a width wider than the corresponding interval between the left and right guide grooves 6. Each protrusion 9 is formed at a position corresponding to the inside of the opening edge 2a of the main body case 2 when the printed board 1 is inserted to the rear end of the main body case 2, and the rear side in the insertion direction of the printed board 1 Printed circuit board 1
Has a right angle with the side edge, and the front edge is formed in a tapered triangular shape.

In particular, the projection 9 from the front edge of the printed circuit board 1
The length S1 up to the right-angled edge 9a is equal to the length S2 from the inner surface of the main body case 2 to the opening edge 2a. Therefore, the printed circuit board 1 is attached to the main body case 2.
In the case where the right side edge 9a of the protruding portion 9 is aligned with the position of the opening edge 2a of the main body case 2, the right side edge 9a of the protruding portion is properly inserted into the printed circuit board 1. It is a mark to confirm whether or not it has been done.

The present embodiment has the above-mentioned structure, and subsequently the assembling procedure will be described. When the front end of the printed circuit board 1 is fitted into the guide groove 6 of the main body case 2 and is inserted into the main body case 2 along the guide groove 6, the front end of the printed circuit board 1 abuts against the back surface of the main body case 2, and FIG. As shown in, the tapered edge 9b of the projection 9 corresponds to the opening edges 2a of the left and right side plates 5 of the main body case 2 and is pushed in while elastically expanding the opening edge 2a to the outside.

That is, since the protrusions 9 provided on the side edges of the printed circuit board 1 press the left and right side plates 5 on the side of the opening edge 2a of the main body case 2 having low rigidity, the left and right sides of the main body case 2 are A special effect is obtained in that the side plate 5 can be easily expanded and deformed. Therefore, the printed circuit board 1
The insertion force of is small. On the other hand, for example, when the protrusion 9 is provided on the front end side in the insertion direction of the printed circuit board 1, the protrusion 9 sequentially presses the side plate 5 from the opening edge 2a of the main body case 2 toward the back. Since the rigidity is extremely high in the back of the main body case 2, the side plate 5 cannot be expanded and deformed, and therefore, an extremely large force is required to insert the printed circuit board 1.

When the printed circuit board 1 is inserted into the main body case 2 as described above, the printed circuit board 1 is pinched from the left and right sides by the restoring elasticity of the side plate 5 of the main body case 2 and thereby moved into the main body case 2. It is fixed and stored improperly.

At this time, the printed circuit board 1 is attached to the main body case 2
If it is inserted to the innermost end, the right-angled edge 9a of the protrusion 9 as a mark is aligned with the opening edge 2a of the main body case 2 as shown in FIG. Is confirmed to have been inserted into. If the right-angled edge 9a of the protrusion 9 is projected from the main body case 2, the printed board 1 may be pushed in until it is aligned with the opening edge 2a.

Then, by fitting the lid case 3 into the main body case 2 with the printed board 1 properly inserted, the unit is assembled as shown in FIG.
When this unit is attached to the vehicle, the printed circuit board 1 does not rattle in the case even if it is subjected to vibration, and therefore, there is no possibility of producing abnormal noise.

As described above, according to this embodiment, in order to obtain the clamping force for fixing the printed circuit board 1 so that it cannot rattle, it is obtained from the reaction force when the side plate 5 of the main body case 2 is expanded and deformed. In addition, since the body case 2 is low in rigidity and is most likely to be deformed, it is expanded and deformed in the vicinity of the opening edge 2a of the main body case 2, so that the force for inserting the printed circuit board 1 can be small.

Further, it is possible to quickly confirm whether or not the printed circuit board 1 is properly inserted by the mark 9a provided on the protrusion 9, and the printed wiring board 1 can be inserted again by inserting the lid case 3. No labor is required, and the efficiency of assembly work can be greatly improved. Also,
Since the main body case 2 as described above tends to warp inward at the time of molding, it is possible to correct the warp by expanding and deforming the side plate 5 by the projection 9.

<Other Embodiments> (1) The position where the protrusion 9 is provided on the side edge of the printed board 1 is the opening of the main case 2 when the printed board 1 is properly inserted into the main case 2. It may be provided between the position corresponding to the edge 2a and the position corresponding to the vicinity of the central portion in the length direction of the side plate 5, that is, in the range in which the side plate 5 can be expanded and deformed.

(2) The shape of the projecting portion 9 is not limited to the shape shown in the above-mentioned embodiment, but it can be fitted into the guide groove 6 without being caught, such as an arc shape, and the side plate of the main body case 2 can be fitted. Other shapes may be used as long as they can function so that 5 can be expanded and deformed.

(3) Further, the protrusion 9 may be provided not on the printed circuit board 1 but on the guide groove 6 side of the main body case 2 or on both sides. (4) Further, the present invention is not limited to the one in which the printed circuit board as shown in the above-mentioned embodiment is housed in the resin case, but the point is that the left and right side edges of the plate-like article are fitted between the side plates of the case. It can be widely applied to all structures to be stored. Others The present invention can be implemented with various modifications without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention before assembly.

FIG. 2 is a perspective view of a state after the assembling.

FIG. 3 is a plan sectional view for explaining its operation.

FIG. 4 is a plan sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Printed circuit board (plate-like article) 2 ... Main body case (case) 2a ... (Opening edge of main body case 2) 5 ... Side plate (of main body case 2) 6 ... Guide groove 9 ... Projection 9a ... (Projection 9) ) Right-angled edge (mark)

Claims (3)

[Claims] 1. A plate-shaped article comprising a plate-shaped article and a case having an opening on one side, and the left and right side edges of the plate-shaped article are fitted and inserted between the left and right inner side surfaces of the case to insert the plate-shaped article into the case. A case-like fixing structure for a plate-shaped article to be fixedly housed in a case, wherein at least one of a side edge of the plate-shaped article and an inner side surface of the case accompanies expansion deformation of a side surface of the case. A structure for fixing a plate-shaped article in a case, wherein a protrusion functioning so as to clamp a side edge of the plate-shaped article is provided. 2. The fixing structure for a plate-shaped article in a case according to claim 1, wherein the protrusion is provided at a position where the expansion deformation is possible on the opening surface side of the case. 3. The protrusion is provided on a side edge of the plate-like article,
3. The structure for fixing a plate-shaped article in a case according to claim 1, wherein the protrusion also serves as a mark for confirming whether the plate-shaped article has been inserted to a predetermined position in the case.