JPH10284856A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance workability of assembling work by providing a chassis or a cabinet with a hooking part, hooking a lead wire of electronic component to the hooking part and earthing the lead wire to the chassis or cabinet thereby decreasing the number of components required for earthing the lead wire. SOLUTION: A hooking part 25 is formed in the longitudinal center of the end face 24 of a back face cabinet 22c. The hooking part 25 is a substantially reverse J-shaped cut made from the idle end of the end face 24 over a specified width and a part of the lead wire 9 of a capacitor 7 is hooked at the forward end thereof 25a. Consequently, the capacitor 7 connected to the electronic circuit side is earthed to a lower cabinet 22. The lead wire 9 of the capacitor 7 is soldered directly, at the forward end thereof, to the upper surface of a shielded plate 2 and soldered, at the other end thereof, to a dummy land 27 on a printed board 1 connected with other earth line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device. In detail, a hook portion is provided on the chassis or cabinet, and the lead wire of the grounding electronic component connected to the electronic circuit is hooked on the hook portion and grounded to the chassis or cabinet. The number of parts for wire connection is reduced, thereby reducing the cost of parts and improving the workability during assembly and maintenance.

[0002]

2. Description of the Related Art In general, when grounding (earthing) is performed, there is a case where an electric connection is made to the ground or an outer box of the device is used as a reference potential. FIG. 5 shows an electronic apparatus 10 in which a metal shield plate 2 arranged on a printed circuit board 1 is grounded to a cabinet 3 constituting an outer box of the apparatus. The metal shield plate 2 is for electromagnetically protecting an electronic circuit, for example, the tuner 4 mounted on the printed circuit board 1 from disturbances such as electromagnetic waves, and surrounds the tuner 4 as shown in FIG. It is attached so as to cover the entire upper surface of the metal case 5.

As shown in FIG. 6, a shield plate 2 is connected to a ground line 6 provided on a printed circuit board 1. If this grounding alone is not sufficient, a method of grounding the shield plate 2 to a cabinet 3 is used. Has been taken. In this case, the shield plate 2 is grounded to the cabinet 3 via a capacitor 7 which is a grounding electronic component in order to enhance the electromagnetic shielding effect while achieving secondary insulation with the electronic circuit.

As shown in FIG. 5, a capacitor 7 has one lead wire 8 directly soldered to the upper surface of the shield plate 2 and the other lead wire 9 soldered to a metal lug plate 11. I have. By fastening the lug plate 11 to the cabinet 3 with screws 12, the lead wire 9 of the capacitor 7 is electrically connected to one end surface of the cabinet 3 and the shield plate 2 is grounded.

When it is necessary to remove the printed circuit board 1 at the time of maintenance or the like, the capacitor 7 can be separated from the cabinet 3 by removing the screw 12.

[0006]

By the way, in the electronic device 10 shown in FIG. 5, in order to connect the lead wire 9 of the capacitor 7 to the cabinet 3, a lug plate 11 and a screw 12 for connecting the lead wire are required. Therefore, there is a problem in that the cost of parts increases, and it takes time and effort to attach the lug plate 11 with the screws 12, and the workability during assembly is poor.

In addition, when the printed circuit board 1 is removed from the device during maintenance or the like, there is a problem in that the work of removing and attaching the lug plate 11 with the screw 12 is troublesome, so that the handleability is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to provide an electronic apparatus which can reduce the cost of parts and improve the workability during assembly and maintenance.

[0009]

In order to solve the above-mentioned problems, an electronic device according to the present invention is provided with an electronic circuit that needs to be grounded, and is provided on one end surface of a chassis or cabinet. Notch-shaped hook,
And a lead wire of a grounding electronic component having one end connected to the electronic circuit, wherein the grounding is performed with the lead wire hooked to the hooking portion.

In the present invention, when the lead wire of the grounding electronic component is grounded to the cabinet, a part of the lead wire is hooked on the hook of the cabinet. Since only the lead wire is hooked, no component for connecting the lead wire is required. As a result, the cost of parts can be reduced, and the workability during assembly and maintenance can be improved because no parts are used.

[0011]

Next, an embodiment of an electronic apparatus according to the present invention will be described in detail with reference to the drawings. The same parts as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a perspective view showing the configuration of the electronic device 20. As shown in FIG. 1, the electronic device 20 includes a printed circuit board 1 having an electronic circuit in a main body including an upper cabinet 21 and a lower cabinet 22.

In FIG. 1, a shield plate 2 is provided in this example constructed on a printed circuit board 1 to protect the tuner section 4 from disturbances such as electromagnetic waves. One end of the shield plate 2 is connected to a ground line 6 provided on the printed circuit board 1.
(FIG. 3), but if this grounding alone is not sufficient, the shield plate 2 is a grounding electronic component to enhance the electromagnetic shielding effect while achieving secondary insulation with the electronic circuit. In this example, two capacitors 7, 7 are used to ground the cabinet 22.

As shown in FIG. 1, the upper cabinet 21 is formed of a thin metal plate, and the upper cabinet 21a and the side cabinets 21b and 21c are formed in a U-shape. On the other hand, the lower cabinet 22 is made of a thin metal plate like the upper cabinet 21, and is formed such that the bottom cabinet 22a, the front cabinet 22b, and the rear cabinet 22c have a U-shape.
The front cabinet 22b is provided with a front operation panel (not shown). The upper cabinet 21 is located at the free ends of the front cabinet 22b and the rear cabinet 22c.
The end faces 23 and 24 are formed by being bent inward by approximately 90 ° so that a part of the back surface of “a” is placed.

As shown in FIG.
The printed circuit board 1 has a rear cabinet 2
Mounted perpendicular to 2c.

In the present invention, as shown in FIG. 2, in order to hook the lead wire 9 of the capacitor 7 on the printed circuit board 1, the hooking portions 25, 2 are provided near the center of the end face 24 in the longitudinal direction.
5 are formed. The engaging portion 25 is cut out from the free end of the end face 24 in a substantially inverted J-shape with a predetermined width, and has a front end portion 25a.
A part of the lead wire 9 of the capacitor 7 is hooked.
By this hooking, the capacitor 7 connected to the electronic circuit side is grounded to the lower cabinet 22.

Here, the ends of the lead wires 8, 8 of the capacitor 7 are soldered directly to the upper surface of the shield plate 2, respectively, and the other ends of the lead wires 9, 9 are connected to the discard lands 27, 27 of the printed circuit board 1. Each is soldered. The dump land 27 is connected to another ground line 9 '.

As shown in FIG. 1, the upper cabinet 21 is attached to the lower cabinet 22 with the capacitors 7, 7 grounded. At this time, as shown in FIG. 3, the lead wire 9 which has been slightly bent and hung is pressed toward the end face 24 by a part of the back surface of the upper cabinet 21a as shown in FIG. That is, the lead wire 9 is sandwiched and held between the end face 24 and the upper cabinet 21a.

When it is necessary to remove the printed circuit board 1 having the tuner 4 during maintenance, first, as shown in FIG.
Then, the lead wire 9 hooked on the hook 25 (FIG. 2) is removed from the hook 25. Then, the printed circuit board 1 having the tuner section 4 is removed from the rear cabinet 22c.

As described above, since the lead wire 9 of the capacitor 7 need only be hooked on the hook portion 25 as it is, the number of parts for connecting the lead wire required at the time of grounding is reduced, and the cost of parts is reduced. And workability during maintenance is improved. The lead wire 9 hooked on the hook 25 is connected to the upper cabinet 21 (upper cabinet 21a).
The lead wire 9 is more securely connected to the lower cabinet 22 and is securely fixed to the lower cabinet 22 because the lead wire 9 is pressed and held on the end face 24 only by attaching the lead wire 9.

In this example, the tuner section 4 has been described as an electronic circuit formed on the printed circuit board 1. However, the present invention is not limited to this, and any device having an electronic circuit that requires grounding is applicable. be able to. In this example, the shield plate 2 is attached to a cabinet (the lower cabinet 2).
Although the case of grounding was described in 2), it is not limited to this,
For example, it may be grounded to the chassis. Further, the hook 2
5 is not limited as long as it can hook the lead wire 9.

[0022]

As described above, in the electronic apparatus according to the present invention, a hook is provided on a chassis or a cabinet, and a lead wire of a grounding electronic component connected to an electronic circuit is hooked on the hook. To be grounded to the chassis or cabinet.

Therefore, the number of parts for connecting the lead wires required at the time of grounding can be reduced, so that the parts cost can be reduced and the workability at the time of assembly and maintenance is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an electronic device 20 according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the electronic device 20.

FIG. 3 is a sectional view of a main part of the electronic device 20 before the upper cabinet 21 is attached.

FIG. 4 is a sectional view of a main part of the electronic device 20 after the upper cabinet 21 is attached.

FIG. 5 is a perspective view showing a configuration of a conventional electronic device 10.

FIG. 6 is a cross-sectional view of a main part of a conventional electronic device 10.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed circuit board 2 Shield board 4 Tuner part 5 Metal case 6, 9 'Grounding line 7 Capacitor 8, 9 Lead wire 10, 20 Electronic equipment 11 Lug board 12 Screw 21 Upper cabinet 21a Upper cabinet 22b Front cabinet 22c Back cabinet 24 End face 25 Hanging part 27 Discard land 22 Lower cabinet

Claims (3)

[Claims] 1. An electronic device having an electronic circuit that needs to be grounded, comprising: a notch-shaped hook provided on one end surface of a chassis or a cabinet; An electronic device comprising: a lead wire for electronic components for use; and grounded while the lead wire is hooked on the hook portion. 2. The electronic device according to claim 1, wherein a part of the lead wire is pressed and held between one end surface of the chassis or the cabinet and an end surface of the cabinet of the electronic device main body. 3. The electronic device according to claim 1, wherein the other end of the lead wire is soldered to an electronic circuit board.