JPH0818244A - Cabinet for electronic device - Google Patents

Abstract

PURPOSE:To provide a cabinet for an electronic device in which components for the electronic device are mounted and fixed easily. CONSTITUTION:A case 100 comprises an upper case 101 and a lower cast that is linked by the upper case 101 and a hinge part 103, and printer boards 106 are mounted in the case 101 and case 102. One end part of the printed board 106 is held between upper and lower when closing the upper case 101 and the lower case 102 and fixed. The other end part the printed board 106 is fastened together with the upper case 101 and the lower case 102 with screws 108. Therefore, the number of points where the printed board 106 is fastened with screws is decreased and the printed board 106 is fixed to the case 100 easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for an electronic device that houses a printed circuit board of the electronic device.

[0002]

2. Description of the Related Art Conventionally, a printed circuit board which constitutes an electronic circuit is covered with a casing so as to protect the printed circuit board from external force exerted directly on the printed circuit board or components mounted on the printed circuit board. As shown in FIG. 11, a housing for housing a printed circuit board generally includes an upper case 301 and a lower case 302, and a printed circuit board 303 is housed inside the housing. In assembling the housing 300, the printed circuit board 303 is screwed to the lower case 302 with screws 304, and then the upper case 301 is screwed to the lower case 302 with screws 305.

[0003]

However, according to the housing 300 shown in FIG. 11, the lower case 302 and the printed circuit board 3 are provided.
Fixing with 03 requires screwing work at 4 places,
Further, it is 4 for fixing the upper case 301 and the lower case 302.
In this conventional example, it is necessary to perform the screwing work at a total of 8 places because the screwing work at the place is required. Further, in this case, even if the fixing method by caulking is used instead of the fixing method by screws, the number of locations for caulking work is the same as the number of locations for screwing work. As described above, in the conventional case, there are many places where the screwing work is required, so that there is a problem that the assembling process of the electronic device is complicated and the number of assembling steps is increased.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an electronic device casing in which components such as a printed circuit board of the electronic device can be easily fixed to the casing. .

[0005]

According to a first aspect of the present invention to solve the above-mentioned problems, an electronic device casing according to claim 1 includes an upper case and a lower case capable of closing an opening of the upper case. A case having a foldable portion that connects the upper case and the lower case with a hinge structure, and a component that can be housed inside the case in which the upper case and the lower case are closed, The foldable portion clamps and fixes the component by closing the upper case and the lower case.

According to a second aspect of the present invention, there is provided an electronic equipment casing according to the first aspect.
The lower case has a locking portion capable of positioning the component. According to a third aspect of the present invention, in the electronic device casing, the upper case having a projecting portion, the lower case having a hole into which the projecting portion can be inserted, and the upper case and the lower case are closed. And a lower case, by rotating the upper case and the lower case relative to each other after inserting the protrusion into the hole. It is characterized in that the parts are clamped and fixed.

[0007]

According to the electronic equipment casing of the present invention, when the upper case and the lower case are closed, one end of a component such as a printed circuit board is vertically fixed by a hinge structure. Therefore, the number of screwed portions of the case can be reduced. This has the effect of simplifying the assembly process of the electronic device and reducing the number of assembly steps.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 5 show a first embodiment in which the electronic device casing of the present invention is applied to a printed circuit board case of an electronic device mounted on an automobile. As shown in FIGS. 1 and 4, the case 100 includes an upper case 101 and a lower case 102.
And a bent portion 103. Upper case 101
And the lower case 102 are connected by a bent portion 103, and the upper case 101, the lower case 102, and the bent portion 103 are made of a metal plate and integrally formed.

The upper case 101 is shaped like a rectangular box without a lid. On the side wall of the upper case 101 opposite to the bent portion 103, a notch 108a having a shape conforming to the shape of the connector 50 attached to the printed board 106 is formed. At two corners on both sides of the notch 108a shown in FIG. 4, when the upper case 101 and the lower case 102 are combined, a recess 105 is formed so that the upper case 101 and the lower case 102 can be screwed from the outside of the case 100. Are formed. The recess 105 is formed with a hole 105a through which the screw 108 can pass. Further, notches 101a are formed at two corners on the side where the bent portion 103 is formed.

The lower case 102 is formed in a rectangular box shape in which the outer circumference of the lower case 102 is slightly smaller than the inner circumference of the side wall of the upper case 101. Therefore, the upper case 101 functions as a lid so as to cover the opening of the upper case 101, and the main body of the lower case 102 functions as a container. Lower case 1
No. 02 has two corners on the opposite side to the bent portion 103, and when the upper case 101 and the lower case 102 are combined, the case 10
A hollow portion 107 is formed so that the upper case 101 and the lower case 102 can be screwed from the outside of 0. The recess 107 is formed on the printed circuit board 1 inside the lower case 102.
It is formed at a height that can be locked to lock the end of 06. In addition, a screw 108 is formed on the surface forming the recess 107.
Is formed with a hole 107a having a thread groove that can be screwed. Further, on the side wall of the lower case 102 on the side where the bent portion 103 is formed, two rectangular protrusions 104 used for positioning the printed circuit board 106 are formed.

The bent portion 103 is located between the upper case 101 and the lower case 102 and is formed in a plate shape. A circular notch 1 is formed at a position toward the upper case 101 side from a center line A that divides the bent portion 103 shown in FIG.
09 are formed at five places. The notch portions 109 have substantially uniform intervals, and are arranged in a line parallel to the center line A. The center line E indicating the center of these notches 109 is the bending position of the hinge structure described later. Bend 1
The printed circuit board 1 is provided near the end of the lower case 102 on the side of 03.
A rectangular hole 104a is formed to form a rectangular protrusion 104 used for positioning 06.

The hinge structure of the bent portion 103 is shown in FIGS.
It will be described based on. Here, the hinge structure is a structure that rotatably connects two members. Upper case 1
FIG. 5 shows a state before 01 and the lower case 102 are closed. At this time, the hinge structure of the bent portion 103 is in an open state, and the printed circuit board 106 is positioned by the protrusion 104 and locked to the bent portion 103. As shown in FIG. 2, while the lower case 102 is fixed, the upper case 101 is covered with the lower case 102 while the bent portion 1
The hinge structure is closed by bending 03.
When the upper case 101 is covered with the lower case 102, the bent portions 103 are bent with the notches 109 arranged in a line as boundaries. At this time, the bent portion 103 is the printed circuit board 1
Since 06 is bent while being sandwiched from above and below, the bent portion 103 fixes the end portion of the printed circuit board 106 in a state where the upper case 101 and the lower case 102 are closed. Further, when the bent portion 103 sandwiches the printed circuit board 106 from above and below, the projecting portion 104 prevents the printed circuit board 106 from moving in the arrow B direction shown in FIG.

A procedure for housing and assembling the printed circuit board 106 in the case 100 will be described with reference to FIGS. As shown in FIGS. 2 and 4, in a state before the upper case 101 and the lower case 102 are closed, a positioning hole 108 formed at one end of the printed circuit board 106.
After the protrusion 104 of the lower case 102 is inserted into the lower case 102, the other end of the printed board 106 is attached to the recess 1 of the lower case 102.
Put it on 07.

As shown in FIG. 1, while the lower case 102 is fixed, the upper case 101 is covered with the lower case 102 and the bending portion 103 is bent. As a result, the hinge structure is closed and the end portion of the printed circuit board 106 is sandwiched from above and below,
The printed circuit board 106 is fixed. At this time, the bent portion 103 viewed from the direction of the arrow III shown in FIG. 1 is shown in FIG.

The printed circuit board 106 is sandwiched by the recessed portion 105 of the upper case 101 and the recessed portion 107 of the lower case 102, and the screw 108 is inserted through the hole 105a to form the hole 107a.
The upper case 101, the printed circuit board 106, and the lower case 102 are fastened together by screwing the screws 108 into the thread grooves formed in the. According to the first embodiment, when the upper case 101 and the lower case 102 are closed by the hinge structure of the bent portion 103, the bent portion 103 sandwiches one end of the printed board 106 from above and below the printed board. Since 106 is fixed, the number of screwing points for fixing the end portion of the printed circuit board 106 is reduced. Further, since the other end of the printed circuit board 106 is fastened together by the upper case 101 and the lower case 102 from above and below with a sandwiching screw, the number of screwing points for fixing only the printed circuit board 106 is reduced.

In the present embodiment, the screw 108 is used to fasten the upper case 101, the lower case 102 and the printed circuit board 106 which do not depend on the hinge structure, but in the present invention, they can be fastened together. There is no limitation to the fixing method using screws, and for example, a fixing method in which the claw provided on the lower case is inserted into the upper case and the printed circuit board and then the claw and the upper case are caulked may be used. .

(Second Embodiment) FIGS. 6 to 10 show a second embodiment in which the electronic device casing of the present invention is applied to a printed circuit board case of an electronic device mounted on an automobile. As shown in FIGS. 6 and 9, in the case 200, the upper case 201 and the lower case 202 are formed separately, and the bent portion 20.
It differs from the first embodiment in that the hinge structure 3 is formed in a claw shape. As shown in FIGS. 6 and 9, the case 20
0 is the upper case 201, the lower case 202, and the bent portion 203.
It consists of and.

The upper case 201 is formed into a rectangular box shape without a lid, and one side wall is formed with, for example, two inverted T-shaped tongue portions 210. Tongue part 210 of the upper case 201
1 is shown so that the upper case 201 and the lower case 202 can be screwed from the outside of the case 200 when the upper case 201 and the lower case 202 are fitted to the two corners of both edges of the side wall opposite to the above. A dent similar to the dent 105 is formed. A hole similar to the hole 105a shown in FIG. 1 through which a screw can pass is formed in this recess.

As shown in FIG. 6, the lower case 202 is formed in a rectangular box shape in which the outer circumference of the lower case 202 is slightly smaller than the inner circumference of the side wall of the upper case 201. Therefore, the upper case 201 functions as a lid so as to cover the opening of the lower case 202, and the main body of the lower case 202 functions as a container. Similar to the upper case 201, the upper case 2 is provided at two corners of the lower case 202 on the side where the hole 220 is not formed.
A recess (not shown) is formed so that the upper case 201 and the lower case 202 can be screwed from the outside of the case 200 when the 01 and the lower case 202 are combined. Similar to the first embodiment, this recess is formed at a height that can be locked inside the lower case 202 for locking the end of the printed circuit board 206. Further, a hole (not shown) having a screw groove to which a screw can be screwed is formed on a surface parallel to the bottom surface of the recess. Further, in the vicinity of the bent portion 203 of the lower case 202, two rectangular protrusions 204 that are used to position the printed circuit board 206 extending vertically upward from the bottom of the lower case 202 are formed. Further, as shown in FIG. 8, two holes 220 are formed on the side wall of the lower case. The holes 220 are convex holes having a size that allows the tongue 210 of the upper case 201 to penetrate therethrough.
It is formed in some places.

As shown in FIGS. 8 and 10, the bent portion 2
Reference numeral 03 includes a tongue portion 210 of the upper case 201 and a hole portion 220 of the lower case 202. The tongue portion 210 includes a rectangular insertion portion 210a and a neck portion 210b. The hole 220 is composed of a rectangular insertion opening 220a slightly wider than the insertion portion 210a and a locking hole 220b slightly wider than the neck 210b.

The hinge structure of the bent portion 203 will be described with reference to FIGS. FIG. 9 shows a state before the upper case 201 and the lower case 202 are closed. Bent part 2 at this time
The hinge structure of 03 is open, and the printed circuit board 20
6 is positioned and locked by the protrusion 204.
As shown in FIGS. 7, 8 and 10, the upper case 201
After inserting the tongue portion 210a of the lower case 202 into the insertion opening 220a of the lower case 202, the lower case 202 is fixed and the upper case 2
01 is covered on the lower case 202. At this time, the bent portion 203 is bent from the joint between the lower case 202 and the neck portion 210b, so that the hinge structure is closed. When the hinge structure is closed, the tongue portion 210a of the upper case 201 inserted into the insertion opening 220a of the lower case 202 presses the printed circuit board 206 and fixes the printed circuit board 206 so as not to move upward. At this time the tongue 210
Since the printed circuit board 206 is sandwiched from above and below by the “a” and the protruding portion 204, the bent portion 203 has the bent portion 203 when the upper case 201 and the lower case 202 are closed.
Fix the end of 6.

A procedure for housing and assembling the printed circuit board 206 in the case 200 will be described with reference to FIGS. 7, 9 and 10. As shown in FIG. 9, an upper case 201 and a lower case 202
In the state before and are closed, the printed circuit board 206
The lower case 202 into the positioning hole 208 formed at the end of the
The protruding portion 204 is inserted. On the other hand, the upper case 201 is erected so that the tongue 210a is perpendicular to the side wall surface of the lower case 202.

As shown in FIG. 10A, the upper case 2
The tongue portion 210a is inserted into the insertion opening 220a until the side wall end of 01 contacts the side wall surface of the lower case 202. As shown in FIG. 10 (b), the neck portion 210b has the locking hole 2
The upper case 201 is moved upward until it comes into contact with the upper portion of 20b. As shown in FIG. 10C, the length L from the lower end 210c of the tongue 210a to the inner wall surface of the lower case 202 is longer than the length L ₁ from the surface of the printed board 206 to the upper end of the locking hole 220b. _{Since 2} is longer, by covering the upper case 201 with the lower case 202, the lower end 210c of the tongue 210 comes into contact with the surface of the printed circuit board 206.

As shown in FIG. 7, when the upper case 201 and the lower case 202 are closed, the lower case 202 is
The tongue 210 is bent from the contact portion between the tongue 210b and the neck 210b, and the lower end 210c of the tongue 210 is pressed against one end of the printed circuit board 206. As a result, one end of the printed board 206 is sandwiched and fixed between the lower end 210c of the tongue 210 and the protrusion 204. In addition, since the width of the locking hole 220b of the lower case 202 is narrower than the width of the tongue portion 210 of the upper case 201, the bent portion 20 having the hinge structure with the upper case 201 and the lower case 202 closed.
Prevent 3 from coming off.

The mounting of the other end of the printed circuit board 206 is carried out by sandwiching the printed circuit board 206 with a recess (not shown) of the upper case 201 and a recess (not shown) of the lower case 202, as in the first embodiment. The upper case 201, the printed circuit board 206, and the lower case 202 are fastened together by passing a screw through the hole and fixing the screw. According to the second embodiment, when the upper case 201 and the lower case 202 are closed by the hinge structure of the bent portion 203, the tongue portion 210 and the protrusion portion 204 form the printed circuit board 206.
Since the printed circuit board 206 is fixed by sandwiching one end of the printed circuit board 206 from above and below, the number of screwing points for fixing the end of the printed circuit board 206 is reduced. Further, since the other end of the printed board 206 is fastened together by the upper case 201 and the lower case 202 from above and below with a sandwiching screw, the number of screwing points for fixing only the printed board 206 is reduced.

[Brief description of drawings]

FIG. 1 is a side view according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a one-dot chain line C shown in FIG. 1 within a circle.

3 is a view in the direction of arrow III shown in FIG. 1. FIG.

FIG. 4 is a plan view of the housing according to the first embodiment of the present invention before assembly.

FIG. 5 is a side view of a bent portion of the housing according to the first embodiment of the present invention before assembly.

FIG. 6 is a side view of an essential part of the housing according to the second embodiment of the present invention after assembly.

7 is an enlarged view of the one-dot chain line D shown in FIG. 6 within a circle.

FIG. 8 is a view on arrow VIII shown in FIG.

FIG. 9 is a diagram showing a positional relationship between an upper case and a lower case before assembling a housing according to a second embodiment of the present invention.

FIG. 10 is a schematic explanatory view showing a procedure of assembling the housing according to the second embodiment of the present invention.

FIG. 11 is a diagram showing a procedure for assembling a printed board to a conventional housing.

[Explanation of symbols]

 100, 200 Case 101, 201 Upper case 102, 202 Lower case 103, 203 Bent part (foldable part) 104, 204 Protrusion part (locking part) 105, 107 Cavity part 106, 206 Printed circuit board (part) 108 Screw 210 Tongue (projection) 220 Hole

Claims (3)

[Claims] 1. A case having an upper case, a lower case capable of closing an opening of the upper case, a foldable portion connecting the upper case and the lower case with a hinge structure, and the upper case. And a part that can be housed inside the case where the lower case is closed, and the foldable portion holds and fixes the part by an operation of closing the upper case and the lower case. A housing for electronic equipment. 2. The electronic device casing according to claim 1, wherein the lower case has a locking portion capable of positioning the component. 3. An upper case having a projecting portion, a lower case having a hole into which the projecting portion can be inserted, and a component which can be housed inside the case in which the upper case and the lower case are closed. After inserting the protrusion into the hole, the upper case and the lower case are relatively rotated to clamp and fix the component between the upper case and the lower case. Equipment housing.