JPH0465191A - Electronic part mounting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to an electrical component mounting device, and particularly to a device for mounting a wiring board and comparatively heavy electrical components mounted thereon to an operation panel. Regarding improvements.

(Prior art) As is well known, electrical equipment is becoming more sophisticated as required functions become more diverse and complex, and in response to this, many electrical parts are being used in electrical equipment to perform operation control, etc. It has become. The electrical components used include relatively light components such as semiconductor elements, resistors, and capacitors, as well as composite components that are made by aggregating many components including power transformers, relays, buzzers, and other lightweight components into blocks. Each electrical component is connected to a conductive path of a predetermined circuit formed on a printed wiring board by soldering its respective conductive terminal, and is mounted on the wiring board by this soldering. has been done. Electrical components are then installed by attaching a wiring board to the inside of the operation panel of the electrical device.

However, in the above-mentioned conventional technology, when a relatively heavy component, especially a power transformer which is a particularly heavy electrical component, is mounted on a wiring board and installed in an electrical device, the following problems arise.

The power transformer, which is the first component to be installed, is heavy, so if you solder the conductive terminals of the power transformer to the conductive path of the wiring board with the wiring board deformed during assembly, the soldering may be done only on the part or on the board. Distortion remains in the OC, which tends to cause cracks in that part over time and poor contact in soldering parts.

Second, when handling electrical equipment, when shock is applied due to vibration or dropping, the wiring board and soldering parts on which a heavy power transformer with a large moment of inertia is attached may be damaged.
Alternatively, since the load is concentrated on the part where the wiring board is attached to the device, the wiring board in this load-concentrated part is likely to break or cracks may occur in the soldered part.

Therefore, soldering may cause malfunctions due to cracks or poor contact, or sparks may be induced due to poor contact, which may cause fire to the wiring board or other components.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned circumstances, and its purpose is to solve the problem when attaching heavy electrical components to a wiring board and installing them on an operation panel. When assembling the operation panel or handling the equipment, even if the load of heavy electrical components is applied, the wiring board and soldering prevent the occurrence of cracks or malfunctions, which may lead to malfunction or fire. The purpose of the present invention is to provide an electrical component mounting device that is free of electrical components.

[Structure of the Invention (Means for Solving the Problems) The electrical component mounting device of the present invention comprises a wiring board on which a conductive path of a predetermined circuit is formed, and a large conductive terminal connected to the conductive path of the wiring board. A heavy electrical component is attached to an operation panel, wherein the operation panel is provided with first and second attachment portions, the electrical component is attached to the first attachment portion, and the conductive terminal thereof is attached to the first attachment portion. It is characterized in that it is provided so as to be directly fixed and connected to the conductive path of the wiring board, and to attach the wiring board to the second mounting part.

(Function) The electrical component mounting device configured as described above attaches a heavy electrical component to the first mounting portion provided on the operation panel.
Since the weight of the heavy electrical components and the load applied thereto are received by the first mounting part, the wiring board and its conductive path are separately connected to the second mounting part. Soldering of conductive terminals of heavy electrical parts does not cause cracks or breaks in the parts.

(Example) Examples of the present invention will be described below with reference to FIGS. 1 to 3.

First, a first embodiment of the present invention will be described with reference to FIG. 1, which shows its assembly situation, and FIG. 2, which shows the main part of a cross section taken along the line A--A in FIG. 1.

1 is an operation panel attached to an electrical device (not shown), which is box-shaped with an open top, and has a first mounting part 2 and a second mounting part each formed in a columnar shape on the inner bottom surface thereof. A plurality of mounting portions 3 and a plurality of third mounting portions 4 are erected.

Reference numeral 5 designates a first printed wiring board, on the lower surface of which a conductive path for a predetermined circuit is formed, and on the upper surface a driving power transformer 6, a buzzer 7, and a DC relay 8 for driving the predetermined circuit. .9 electrical parts are mounted, and the operation panel 10 is provided in a box-like interior parallel to the inner bottom surface. The drive power transformer 6 has a conductive terminal 10 connected to a conductive path on the wiring board 5 by soldering 11, and the other electric components similarly connect their conductive terminals to the conductive path on the wiring board 5 by soldering. are doing. Further, the first printed wiring board 5 is provided with a first hole 12 for mounting the power transformer 6 and a second hole I3 for mounting the wiring board. Note that the first hole 12 is formed in a size that allows the first mounting portion 2 to pass through it.

Reference numeral 14 designates a second printed wiring board, and a conductive path for a predetermined circuit is formed on the bottom surface of this board 14, and a large number of electrical components such as semiconductor elements, resistors, capacitors, etc. are mounted on the top surface (not shown). It is provided between the inner bottom surface of the operation panel 1 and the first printed wiring board 5. Note that each electrical component has its respective conductive terminal connected to the conductive path of the wiring board by soldering. The second printed wiring board 14 also has a third mounting hole 15 and columnar first and second holes.
fourth and fifth holes 1 for passing the mounting part 2.3 of the
6 and 17 are provided.

The height of each mounting part is higher than either the first mounting part 2 or the second mounting part 3, and the second mounting part 3 is higher than the third mounting part 4. , the upper end surface of each mounting portion is provided so as to form the same plane for each mounting portion, and each upper end surface has six fills for screwing the wiring board 5 with screws, 1
9.20 is formed.

The difference in height between the first mounting portion 2 and the second mounting portion 3 is the difference between the lower surface of the mounting portion 21 provided on the frame of the drive power transformer 6 and the mounting surface of the first printed wiring board 5. difference, i.e.
In this embodiment, the thickness is set equal to the thickness of the first printed wiring board 5.

To attach the first and second printed wiring boards 5 and 14 on which electrical components are mounted to the operation panel 1, first place the second printed wiring board 14 into the third mounting part 4 and the third hole 15.
After installing the drive power transformer 6 by screwing the mounting screw 22 into it, the drive power transformer 6 is directly attached to the mounting part 2 of the joint 1 with its mounting part 21
At the same time, screw the mounting screw 23 into the hole 12 of the first
The printed wiring board 5 is attached to the second mounting portion 3 through the second hole 1.
This is done by screwing the mounting screw 24 into 3.

With this configuration, the driving power transformer 6, which is a particularly heavy electrical component, is attached to the first mounting portion 2 of the operation panel 1, so that the first printed wiring board 5 is connected to the driving power source. There is no deformation due to the weight of the transformer 6. Further, when a shock due to vibration or dropping is applied, since the drive power transformer 6 is not attached to the first printed wiring board 5, the load is not concentrated on the wiring board and soldering parts.

This prevents the wiring board from breaking, cracks from soldering, and poor contact.

Next, a second embodiment of the present invention will be described using the sectional view of FIG. 3 showing the main parts thereof. Note that the same parts as those in the first embodiment are given the same reference numerals, and the explanation thereof will be omitted, and the different parts will be explained.

Reference numeral 25 denotes a first mounting portion provided on the inner bottom surface of the operation panel 1, and this height is formed to be the same as the second mounting portion 3.

26 is a first printed wiring board, and this wiring board 2
6 has a mounting portion 21 for the drive power transformer 6 mounted thereon.
A first hole 27 for attaching a power transformer, which is smaller in diameter than the outer diameter of the upper end of the first attaching portion 25, is formed concentrically with the attaching hole.

The driving power transformer 6 is attached to the upper end surface of the first mounting portion 25 with mounting screws 2 together with the first printed wiring board 26.
It is attached to the operation panel 1 by screwing 3.

With this configuration, the first printed wiring board 26 does not deform as in the first embodiment, and even when subjected to impact due to vibration or dropping, the first printed wiring board 26 and When soldering, there is no concentration of load on any part. This prevents the wiring board from breaking, cracks from soldering, or poor contact.

Furthermore, since the heights of the first mounting part 25 and the second mounting part 3 are the same, it is easier to manufacture the operation panel 1 than when there is a difference in height between the two mounting parts. There is no need to equalize the height difference between the two mounting parts and the size of the mounting part formed by combining the drive power transformer and the first printed wiring board to be mounted thereon.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with appropriate modifications within the scope of the invention.

[Effects of the Invention] As is clear from the above description, the present invention provides first and second mounting portions on the operation panel, and attaches a heavy electrical component to the first mounting portion, and also provides electrical conductivity. By adopting a structure in which the terminal is directly fixed and connected to the conductive path of the wiring board, and the wiring board is attached to the second mounting part,
The following effects can be obtained.

In other words, when attaching heavy electrical components to a wiring board and installing them on an operation panel, the wiring board and soldering may crack into parts due to the load applied to the heavy electrical components during assembly and handling of the operation panel. This eliminates the risk of malfunction or fire.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the assembled state of the first embodiment of the present invention, FIG. 2 is a cross-sectional view showing the main part of the section taken along the line A-A in FIG. 1, and FIG. 3 is the present invention. FIG. 3 is a cross-sectional view showing the main parts of the second embodiment. DESCRIPTION OF SYMBOLS 1...Operation panel, 2...First mounting part, 3...Second mounting part, 5...First printed wiring board, 6...Drive power transformer, Agent Patent attorney Norihuo Daiko

Claims (1)

[Claims] A wiring board on which a conductive path of a predetermined circuit is formed and a heavy electric component whose conductive terminals are connected to the conductive path of the wiring board are attached to an operation panel, in which a first A second mounting part is provided, the electrical component is mounted to the first mounting part, and its conductive terminal is directly fixed and connected to the conductive path of the wiring board, and the wiring board is connected to the second mounting part. An electrical component mounting device characterized in that it is installed so as to be mounted on a mounting portion.