JPH09283949A - Substrate mounting structure for electronic part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily lessen weight stress on a substrate without making another member hold a weight parts. SOLUTION: Attaching/fixing of a weight parts 4 to a substrate 1 and attaching/fixing of the substrate 1 to a base material 13 are performed for integration with a common screw 16. By this, the weight parts 4 is directly attached/fixed to the base material 13, so that weight stress of the weight parts 4 is not directly applied on the substrate 1. Thus the substrate 1 is not bent or distorted with the weight parts 4 without holding the weight parts 4 with another member. Thus the weight stress on the substrate 1 is easily lessened only by employing such structure as this for each weight parts 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board mounting structure for electronic parts, in which various electronic parts including heavy parts are mounted on a board.

[0002]

Generally, a power supply device called a board type has various electronic parts constituting a power supply circuit mounted on the upper surface of a board having a circuit pattern formed on both sides or one side. By forming mounting holes at the four corners and inserting screws directly into these mounting holes and hollow spacers, the substrates can be mounted on the device body, which is the base material, with the height of the hollow spacers. I have to.

Such a board type power supply device can easily be made compact and low in cost by omitting outer shell parts such as a housing or by making the board thin. However, since the mounting weight of electronic parts depends on the strength of the board, if heavy parts such as a switching transformer or a choke coil for suppressing harmonic current are included in the electronic parts, place them directly on the board. In this case, the substrate may be bent or deformed.
Therefore, in practice, it is limited to a power supply device with an extremely small output capacity, or a frame such as an L-shaped sheet metal is used as the device body, and heavy parts are attached to the rising part of this frame to reduce the weight stress on the board. There was a need.

In view of the above problems, the present invention provides a board mounting structure for an electronic component, which can easily reduce the weight stress on the substrate without holding a heavy component in a separate member. To aim.

[0005]

In order to achieve the above-mentioned object, a board mounting structure of an electronic component according to the present invention is a board mounting structure of an electronic component in which various electronic components including heavy parts are mounted on a substrate, The board and the heavy component are each provided with a mounting hole, and a common fastening member is provided in each of the mounting holes to mount and fix the board and the heavy component to the base material.

The term "fastening member" as used herein includes various members such as screws and bolts. In addition, the heavy component refers to a component in which the board bends or deforms when mounted on the board as it is. Specifically, this corresponds to an electronic component having a magnetic member such as a switching transformer or a harmonic current suppressing choke coil in a power supply device.

With the above structure, the heavy component is directly attached and fixed to the base material because the heavy component is attached and fixed to the substrate and the base material is integrally attached and fixed by the common fastening member. As a result, the weight stress of the heavy component is not directly applied to the substrate. Therefore, even if the heavy component is not held by another member, the substrate is not bent or deformed by the heavy component, and if such a structure is adopted for each heavy component, the weight stress on the substrate can be simplified. Can be tempered. Further, since another member for holding the heavy component can be omitted, it is possible to attach another component such as a radiator by utilizing the omitted empty space.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a board type power supply device will now be described with reference to the accompanying drawings.
This will be described with reference to FIG. In the figure, 1
Is a substrate on which various electronic components 2 constituting a power supply circuit are mounted, and circuit patterns 3 obtained by printed wiring processing of a metal foil such as copper are appropriately formed on both surfaces of this substrate. It The electronic component 2 includes the switching transformer 4, which is a heavy component. The switching transformer 4 is composed of a coil portion 5 provided substantially at the center and a magnetic member 6 for electromagnetically coupling with the coil portion 5, and both side surfaces of the magnetic member 6 are
Mounting members 7 each having an L-shaped cross section are provided.
Although not shown here, the winding end portion of the coil portion 5 is soldered to an appropriate place of the circuit pattern 3.

The horizontal portion 8 of the mounting member 7 is provided with a mounting hole 11 into which a screw 16 described later can be inserted. The board 1 is also provided with mounting holes 12 through which screws 16 can be inserted, at four corners thereof and at positions facing the mounting holes 11. Reference numeral 13 denotes a flat plate-like base material made of, for example, an aluminum member for mounting the board 1 in a state of being separated by the height of the hollow spacers 14. A female screw hole 15 is provided to face. Then, each mounting hole 11, 12 and the hollow spacer 14
When the screw 16 which is a common fastening member is inserted into the female screw hole and the tip of the screw 16 is screwed into the female screw hole 15 of the base material 13, the hollow spacer 14
The substrate 1 and the weight component 4 are attached and fixed to the base material 13 in a state of being held.

However, in the above structure, the mounting holes 11 and 12 of the board 1 and the weight component 4 are provided with the screws 16 which are common fastening members to mount and fix the board 1 and the weight component 4 to the base material 13. I am trying to do it. That is, since the mounting and fixing of the heavy component 4 to the substrate 1 and the mounting and fixing of the substrate 1 to the base material 13 are integrally performed by the common screw 16,
The heavy component 4 is directly attached and fixed to the base material 13, and the weight stress of the heavy component 4 is not directly applied to the substrate 1. Therefore, even if the heavy component 4 is not held on the rising portion of the frame as in the conventional case, the substrate 1 is not bent or deformed by the heavy component 4, and such a structure is provided for each heavy component 4. Just adopt it,
It is possible to easily reduce the weight stress on the substrate 1. Further, since a separate member for holding the heavy component 4 can be omitted, it is possible to attach a separate component such as a radiator by utilizing the omitted empty space.

Further, particularly in the board type power supply device, it is possible to realize a power supply device having a larger output capacity than the conventional one, and moreover, since the structure is simplified by omitting a separate member, it is possible to reduce the size, There is also an effect that the price can be easily reduced.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the present invention. Although the embodiments have been described with reference to the substrate type power supply device, the present invention can be applied to other uses. Also, the number and positions of the mounting holes may be appropriately selected according to the weight of the heavy component, the strength of the board, and the like.

[0013]

The board mounting structure for electronic parts according to the present invention is a board mounting structure for electronic parts in which various kinds of electronic parts including heavy parts are mounted on the board, and mounting holes are provided in the board and the heavy parts, respectively. A common fastening member is provided in each of the mounting holes to attach and fix the substrate and the heavy component to the base member. Even if the heavy component is not held by another member, the stress of the substrate is reduced. It is possible to ease easily. In addition, since a separate member for holding the heavy component can be omitted, the omitted empty space can be effectively used.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the same.

[Explanation of symbols]

 1 substrate 2 electronic component 4 heavy component 11, 12 mounting hole 13 base material 16 screw (fastening member)

Claims (1)

[Claims] 1. In a board mounting structure of an electronic component in which various electronic components including a heavy component are mounted on a substrate, mounting holes are respectively provided in the substrate and the heavy component, and a fastening member common to each mounting hole. And mounting and fixing the substrate and the weight component to a base material.