JPH01146395A - Electronic equipment - Google Patents

Abstract

PURPOSE:To eliminate the need for the troublesome process of fixing by a machine screw, etc., and to fasten and ground a printed board only by elastically engaging the printed board with a holding member by fixing the holding member composed of a conductive material to one part of the component of a device consisting of the conductive material and mounting the printed board to the component through the holding member. CONSTITUTION:In an electronic equipment in which a printed board 1, an edge of which has a grounding electrode pattern 8, is housed, holding members 4 elastically holding the edge of the printed board 1 and being composed of a conductive material are fastened to one parts of the component 3 of the device consisting of the conductive material under a conductive state, and the printed board 1 is set up to the component 3 through the holding members 4. The holding members 4 are fixed at specified positions, where the printed board 1 on the frame 3 made of a metal in the device must be fastened, through welding, etc. The holding member 4 is formed by bending a conductive metallic plate to approximately an S shape as shown in the figure, and the upper section of the holding member 4 has an elastic holding section 4a bent to a chevron shape. An edge, on which a grounding electrode pattern 8 is shaped, in the printed board 1 is supported by the holding members 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic device, and particularly to an electronic device in which a printed circuit board having a ground electrode pattern on its edge is housed inside the device.

[Prior Art] Printed circuit boards have been widely used in various electronic devices as members that improve the mounting efficiency and productivity of electric circuits.

FIG. 4 shows a conventional mounting structure of a printed circuit board on a device.

Reference numeral 3 in FIG. 4 indicates the frame of the device, which is constructed of metal material. At a predetermined position on the frame 3, a leg portion 6 having a substantially U-shaped shape is provided.
are fixed by methods such as multi-sided spot welding.

Tapped holes 6a are provided on the upper surface of each leg 6, and the printed circuit board can be assembled by tightening screws 5 passed through holes 2 provided corresponding to each leg 6 into the legs 6. Fixed.

[Problem to be Solved by the Invention 1] In the conventional configuration as described above, a large number of screws are required to attach the printed circuit board l, and the legs 6 that receive these screws must be processed, making it difficult to reduce costs. 0 without using the leg part 6,
It is also conceivable to screw the screws 5 directly into the frame 3, but even in this case, a large number of tapped holes must be placed in accurate positions, and the same problem arises.

Furthermore, if it is necessary to ground the ground pattern of the printed circuit board 1, connect the frame 3 and the printed circuit board l with a ground wire or the like, or provide a ground pattern around the through hole 2 to which the screw 5 is fixed. , a method of grounding using screws 5 is used.

However, it is difficult to obtain a sufficient grounding condition using ground wires and screws, and if the grounding point is not appropriate, problems may occur due to noise.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, in an electronic device that houses a printed circuit board having a ground electrode pattern on the edge inside the device, the edge of the printed circuit board is A configuration is adopted in which a holding member made of a conductive material that retains elasticity is fixed in a conductive state to a part of a component of the device made of a conductive material, and the printed circuit board is attached to the component through the holding member.

[Function] According to the above configuration, the printed circuit board can be fixed and grounded simply by elastically engaging the printed circuit board with the holding member without requiring a troublesome process such as fixing with screws.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 shows the structure of an electronic device employing the present invention. In FIG. 0, reference numeral 3 denotes a metal frame of the device as in the conventional example.

At a predetermined position on the frame 3 where the printed circuit board 1 is to be fixed, a holding member 4 is fixed by adhesion with a conductive adhesive, welding, or the like.

As shown in FIG. 2, the holding member 4 is made by bending a conductive metal plate into a substantially S-shape, and has an elastic holding portion 4a bent in a dogleg shape on the top thereof. .

The distance between the upper surface of the intermediate portion 4b of the holding member 4 and the vertex of the dogleg-shaped bent portion of the elastic holding portion 4a is normally set to be slightly smaller than the thickness of the printed circuit board 1. The printed circuit board 1 can be held by inserting the printed circuit board 1 between the elastic holding portion 4a and the intermediate portion 4b as shown in the sectional view taken along the line AA in FIG.

The fixing position of the holding member 4 is determined according to the shape of the edge of the printed circuit board 1, as shown in FIG. Furthermore, only one leg 6 is fixed on the frame 3, similar to the conventional one. This fixing position is set approximately at the center of one edge of the printed circuit board l.

On the other hand, the printed circuit board l used in this example is
A predetermined electric circuit is mounted, and ground patterns 8 are provided on three sides around the electric circuit.

In such a configuration, in order to mount the printed circuit board l, the printed circuit board l should be mounted between the elastic holding portion 4a of each holding member 4 fixed to the frame 3 and the upper surface of the intermediate portion 4b in the direction of the arrow in the figure. Push l.

After pushing the printed circuit board 1 to a predetermined position, the screw 5 is passed through the through hole 9 provided at the edge of the printed circuit board 1,
By tightening the legs 6, the printed circuit board 1 is mounted in a predetermined position.

In this state, each holding member 4 firmly holds the three edges of the printed circuit board 1 due to its elasticity. At the same time, each holding member 4 made of conductive metal comes into close contact with the ground pattern 8 of the printed circuit board 1, and the frame 3 and the ground pattern 8 are reliably electrically coupled via each holding member 4. Therefore, vcJ'I! of the printed circuit board 1 is more reliable than the conventional structure shown in FIG. ! is possible.

Further, since the holding member 4 has conductivity and a certain degree of elasticity, it can resist vibrations and shocks transmitted from the frame 3 to the printed circuit board l.

The above structure does not require the process of creating many screw holes and many screws, and it is very easy to incorporate the printed circuit board l, and the number of parts is small, so it is significantly larger than the conventional configuration shown in Figure 4. A significant cost reduction is possible. Also,
Since the printed circuit board 1 can be easily removed without removing many screws, it is also easy to maintain.

Therefore, this embodiment is also suitable for a structure in which an optional printed circuit board is mounted on the main body of the apparatus.

In the above example, the width of the elastic holding part 4a of the holding member 4 alone is relatively small and the printed circuit board 1 is fixed using a large number of holding members 4, but the width of one elastic holding part is increased. For example, the length should be approximately equivalent to the edge of the printed circuit board l,
Each side of the printed circuit board 1 may be held by one holding member 4, or it is also possible to integrally form a holding member 4 shaped like a U-shape around three sides of the printed circuit board 1. .

Moreover, although the holding member 4 made of metal has been illustrated above, it is also conceivable that the holding member 4 is made of a material such as conductive rubber. If conductive rubber is used for the holding member 4, it is possible to obtain better vibration and impact buffering effects than in the above embodiments. Even in this configuration, the various modifications described above are possible.

[Effects of the Invention] As is clear from the above, according to the present invention, in an electronic device in which a printed circuit board having a ground electrode pattern on the edge thereof is housed inside the device, the electronic device is made of a conductive material that elastically holds the edge of the printed circuit board. Since the holding member is fixed in a conductive state to a part of the component of the device made of a conductive material, and the printed circuit board is attached to the component via the holding member, there is no need for troublesome screw fixing. does not require a process,
It is possible to provide an excellent mounting structure that can be easily and inexpensively implemented, in which the printed circuit board can be fixed and grounded simply by elastically engaging the printed circuit board with the holding member.

[Brief explanation of the drawing]

1 is an exploded perspective view showing the mounting structure of a printed circuit board according to the present invention, FIG. 2 is a perspective view of the holding member shown in FIG. 1, and FIG. 3 is a sectional view taken along line A-A in FIG. FIG. 4 is an exploded perspective view showing a conventional printed circuit board mounting structure. l... Printed circuit board 2... Through hole 3... Frame 4... Holding member 4a... Elastic holding part 5... Screw 8... Grounding pattern!・-J name t4 Sono Buri〉Toto (direction Iga; Toro Kei pn & behavior)
Fn side entrance figure 4

Claims (1)

[Claims] 1) In an electronic device in which a printed circuit board having a ground electrode pattern on the edge thereof is housed inside the device, a holding member made of a conductive material that elastically holds the edge of the printed circuit board is in a conductive state and made of a conductive material. An electronic device, wherein the electronic device is fixed to a part of a component of an apparatus, and the printed circuit board is attached to the component via the holding member. 2) A ground electrode pattern is provided on a plurality of edges of the printed circuit board, and each edge on which the ground electrode pattern is provided is supported by the holding member. Electronics.