JP3199477B2 - Housing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing structure, and more particularly, to a housing structure which is easy to assemble and can avoid generation of chatter even when an oscillation circuit system is built in. .

[0002]

2. Description of the Related Art Conventionally, in the case of an audio equipment product, especially when an oscillation circuit system product is used, it is often housed in an appropriate housing structure for the purpose of protecting the product or dissipating heat. As the housing structure 1, as shown in FIG. 2, for example, a combination of an aluminum die-casting case main body 2 and a sheet metal cover body 3 is mainly used, and the die-casting case main body is used. 2 and the sheet metal cover body 3 are provided on the die-cast case main body 2 by inserting screws 5 through a brass boss assembling part 4 formed inside the sheet metal cover body 3. It was screwed to the tap portion 6 provided.

However, in the case structure 1 as shown in FIG. 2, since the case body 2 made of die-casting and the cover body 3 made of sheet metal are fixed with screws only in the vertical direction, Since the side surface of the sheet metal cover body 3 is not fixed to the die-cast case body 2, it is free in the lateral direction. Therefore, when vibration generated from an internal circuit is applied to the housing structure 1, the cover member 3 made of sheet metal causes resonance, and so-called chatter sound is generated.

[0004] Such chattering sound is, in many cases, relatively high-frequency vibration, and causes discomfort to the human body. In order to prevent such chattering noise, as shown in FIG. 3, a screw hole 7 is provided in a part of the side surface 9 of the die-cast case main body 2 and at the same time, the side surface of the sheet-metal cover body 3 is provided. A screw insertion hole 8 is also provided at a position opposite to the screw hole 7 of the portion 10 to fit and fix the case body 2 made of die-casting and the cover body 3 made of sheet metal. A method in which the two are fixed using the screw insertion holes 8 or a method in which a concave portion 39 is provided in a part of the side surface portion 9 of the die-cast case main body 2 and the sheet-metal cover body 3 is formed at the same time.
A convex protrusion and a notch portion 40 are provided at a position of the side surface portion 10 facing the concave portion 39, and the concave portion 39 and the convex protrusion are provided.
There is also known a method of fitting and fixing with the potch portion 40.

[0005] Incidentally, the case body 2 made of die-casting as described above.
When the cover member 3 and the sheet metal cover body 3 are fitted together, the electrical connection is ensured, and the shielding function against external noise can be improved. However, in such a configuration,
In order to provide a screw hole in the side surface portion 9 of the die-cast case main body 2, it is necessary to prepare another die to be pulled out in the lateral direction in addition to the upper and lower punching dies.
In addition, there is a problem that the manufacturing cost is increased due to the necessity of producing an extra mold.

In other words, in such a conventional method, although the performance of the housing structure itself is improved, a mold is unnecessary.
It and the process that need to be made can not be said to be economical way from the problem that the increase by that amount.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned disadvantages of the prior art and to make sure that the die-cast case body and the sheet-metal cover are securely adhered to each other with a simple structure. Another object of the present invention is to provide a housing structure capable of preventing generation of chattering noise and realizing simplification of a manufacturing process and reduction of a manufacturing cost by using only upper and lower dies.

[0008]

The present invention employs the following technical configuration to achieve the above object. That is, it is composed of a die-cast case body and a sheet-metal cover body fitted to the case body ,
Side surface of the die-cast case body and the sheet metal cover
It is a housing structure configured so that the side portion of the body portion is overlapped, and is formed on the side portion of the die-cast case main body portion, extending from the middle of the side portion, and at the bottom of the die-cast case main body portion. A first vertically extending communicating portion is provided, and the projecting portion protrudes inside the sheet metal cover body on the side surface side of the die-cast case main body, and can be fitted to the first groove. Are provided, and the first groove is provided.
The projection is hooked on the end of the
And a housing structure in which the metal body and the sheet metal cover body are engaged .

[0009]

Since the housing structure according to the present invention employs the above-described basic technical configuration, a groove provided on the die-casting case main body and a protrusion provided on the sheet-metal cover body are provided. However, since they are easily and easily fitted with each other and securely fixed to each other in close contact with each other, even when a slight vibration is generated from the product inside the housing structure, the vibration is generated even when some vibration is generated from the product inside the housing structure. The housing structure itself does not generate vibration.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a housing structure according to the present invention. That is, FIG. 1 is a view showing the structure of a specific example of a housing structure 1 according to the present invention. In the drawing, a die-cast case body 2 and a sheet-metal cover body 3 fitted to the case body 2 are shown. And a part of the side surface portion 9 of the die-cast case main body 2, and the casing structure 1 of the die-cast case main body 2.
A first vertically-directed portion communicating with the lower end portion 14 through the communicating portion 22;
And a projection 16 which is provided inside the die-cast case body 2 of the sheet metal cover body 3 and which can be fitted with the first groove 11. It is.

In the present invention, the die-casting case main body is formed from a material such as aluminum or brass plate into an appropriate shape by a die-casting method. The material of the cover member 3 made of sheet metal used in the present invention is not particularly limited, and a material that can be processed into a predetermined shape using sheet metal is used. That is, the housing structure 1 according to the present invention.
In this method, a first groove 11 provided in a die-cast case main body 2 and a projection 16 called a potch provided in the sheet metal cover body 3 are fitted to each other. Specifically, when the two are fitted together and the sheet metal cover body 3 is pushed downward, the projection 16
Are fitted and fixed in the grooves 11.

The groove 11 in the die-cast case main body 2 also has a function of aligning the die-cast case main body 2 and the sheet metal cover body 3. In the present invention, as described above, the sheet metal cover body 3
However, the above-mentioned fitting is realized by utilizing the deformation stress of the side surface portion 10. In order to generate a predetermined stress on the side surface portion 10 of the sheet metal cover body portion 3, FIG. As shown in the figure, it is desirable that the four corners of the sheet metal cover body 3 are joined and fixed by, for example, spot welding.

Further, in the housing structure 1 according to the present invention, the groove 11 provided on one side surface 9 of the die-cast case main body 2 has an end portion, that is, as shown in FIG. The portion of the portion 9 that contacts the lower end 14 is the lower end 14
And a communication portion 22 that communicates with the space through the communication portion. Also, a notch 15 is provided in the lower end 14, and the notch 15 is formed in the lower end 14 of the groove 11.
It communicates with the communication part 22.

In the present invention, the configuration of the groove 11 is based on the use of the upper and lower dies as described above. The shape of the groove 11 according to the present invention is not particularly limited, and is appropriately determined according to the size of the projection 16 provided on the sheet metal cover body 3. The housing structure 1 according to the present invention restricts and fixes only the vertical direction of the case main body 2 made of die-casting and the cover body 3 made of sheet metal, and at the same time, restricts the degree of freedom in the lateral direction of the side surfaces (four surfaces). The special configuration as described above is adopted.

Further, as another specific example according to the present invention, as shown in FIG. 1, the side surface 9 provided with the first groove 11 of the die-cast case main body 2 is provided. And communicates with the upper edge 13 of the side face 9 from the upper edge 13 of the side face 9 toward the first groove 11.
Part communicated through 21, and the center axis thereof in the housing structure in which the second groove portion 12 formed toward the first groove portion 11 so as to coincide with the center axis of the first groove portion 11 is provided is there.

That is, as a second specific example according to the present invention, a second groove 12 is provided on the side surface 9 of the case body 2 made of die-casting and extends in a direction in which the first groove 11 extends. Yes, the second groove 12 is the first groove 1
As with 1, the upper and lower dies are used.
Of the second groove 12, the communicating portion 21 which communicates with the upper edge 13 of the side surface portion 9 is formed.

The width of the second groove 12 gradually decreases from the upper edge 13 on the side surface 9 of the die-cast case body 2 toward the first groove 11. It is preferable that the groove depth is gradually reduced. By taking such a configuration, the second groove 12 is
It becomes possible to function as a guide groove for the projection 16,
The sheet metal cover body 3 is attached to the die-cast case body 2.
Is fitted and pushed downward, the position of the projection 16 is accurately determined, and finally, the first and second grooves 1
The flat portion 23 provided between 1 and 12 is
Is fitted into the first groove portion 11 so that
The die casting case body 2 and the sheet metal cover body 3 are securely joined and fixed.

After the fitting operation is completed or in the middle of the fitting operation, a screw 18 is inserted through a screw hole 17 provided in the sheet metal cover body 3 as shown in FIG. It is to be screwed to the tap portion 20 of the case body 2 made of die casting. In the present invention, at least one groove portion 11 is provided on one side surface 9 of the die-casting case main body portion 2, and two or more groove portions 11 may be provided. Not desirable.

[0019]

Since the housing structure according to the present invention has the above-mentioned technical configuration, the housing has a groove provided on the die-casting case main body and a projection provided on the sheet-metal cover body. However, since they are easily and easily fitted with each other and securely fixed to each other in close contact with each other, even if some vibration is generated from the product inside the housing structure, the vibration is generated even when some vibration is generated from the product inside the housing structure. There is an effect that a housing structure in which the housing structure itself does not vibrate and generate chatter can be obtained at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a specific example of a housing structure according to the present invention.

FIG. 2 is a diagram showing an example of a conventional method of assembling a housing structure.

FIG. 3 is a diagram showing another example of a conventional method of assembling a housing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing structure 2 ... Die cast case main body 3 ... Sheet metal cover body 4 ... Boss installation part 5, 18 ... Screw 6, 20 ... Tap part 7, 8, 17 ... Screw hole 9 ... Die cast case main body Side surface portion 10: Side surface portion of sheet metal cover body portion 11: First groove portion 12: Second groove portion 13: Upper side edge portion of side surface portion of die-cast case body 14: Lower side end of side surface of die-cast case body 15 ... Notch 16 ... Protrusion 19 ... Spot welded part 21, 22 ... Communication part of groove 23 ... Flat part 39 ... Depressed part 40 ... Convex part

Claims (4)

(57) [Claims] 1. A consists of a sheet metal cover portion fitted to the die-cast case body portion and said case body, said die-
The side of the strike case body and the side of the sheet metal cover body
It is a housing structure configured so as to be overlapped with the surface portion, and the side surface portion of the die casting case main body portion has the side surface portion.
A vertical first groove extending from the middle thereof and communicating with the bottom of the die-cast case main body, and a side surface of the die-cast case main body of the sheet metal cover body;
A protrusion protruding inwardly of the portion side and capable of fitting with the first groove portion; and providing the protrusion at an end of the first groove portion.
Is caught by the die-cast case body and the sheet metal
A housing structure characterized by being engaged with a cover body . 2. The side surface of the die-cast case body in which the first groove is provided, wherein the first groove extends from the upper edge of the side toward the first groove . Groove
Parts extends so as not linked to the, and communicates with the upper edge of the side surface portion, and the second groove is provided in which the central axis is formed so as to coincide with the center axis of the first groove The housing structure according to claim 1, wherein the housing structure is provided. 3. The second groove is configured such that a groove width decreases from an upper edge end on a side surface of the die-cast case body toward the first groove. The housing structure according to claim 2, characterized in that: 4. The second groove is configured such that the depth of the groove decreases from the upper edge on the side surface of the die-cast case body toward the first groove. The housing structure according to claim 2 or 3, wherein: