JPH0448565A - Connecting method between circuit units - 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] [Industrial Application Field] The present invention provides a circuit board unit 2 during operation of a peripheral equipment device.
This relates to improvements in preventing noise generation from sources.

[Conventional technology]

[Problems to be Solved by the Invention] However, the conventional method of connecting the ground (GND) lines between circuit board units with a wire harness etc. sometimes has poor operability when removing and attaching the circuit boards. In addition, the connector connection method is to connect multiple connector terminals to a ground (GND) line, but if there are many signal lines within a limited size (product space, number of connector terminals), use the ground (GND) line. Since it could not be used as multiple connector terminals, countermeasures against KM (electromagnetic interference) were impossible, and even if noise prevention parts (cores, ferrite beads), etc. were mounted on the board, there was no improvement in EM (electromagnetic interference). is often not expressed (
However, as a final measure, the board had to be changed (changed the board artwork).

Therefore, in order to solve these conventional problems, the present invention improves the operability of the circuit board unit and makes it easier to change the circuit board.
The purpose is to provide countermeasures against ICM problems (electromagnetic interference) without changing board artwork.

In addition, conventional countermeasures for noise prevention components (cores, ferrite beads), etc. have no commonality in circuit content (and the area of the circuit board unit increases depending on the number of noise prevention components (cores, ferrite beads), etc.). In the end, there was a problem that even the structure of the product design had to be changed.

The purpose of the present invention is to take measures against EM (electromagnetic interference) using WR-based processing.

[Means to solve the problem]

In order to solve the above problems, the present invention is characterized in that a metal piece having spring properties and a metal post in contact with the metal piece are mounted on a circuit board.

[Effect]

When a metal piece with spring properties and a metal post that contacts it are attached to the connecting part between the circuit board units as described above, the ground (GND) level between the circuit board units becomes the same potential level, so the circuit board units Noise generation from the surrounding area can be prevented.

In addition, the number of cores, ferrite beads, etc. as noise prevention components can be reduced, making it possible to downsize the circuit board unit.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. In FIG. 1, a metal piece 5 having spring properties is attached on the ground pattern of the circuit board unit 1, and a metal post 4 in contact with the metal piece is attached on the ground pattern of the circuit board unit 2. When the connector 5 of the circuit board unit 1 is set, the metal piece 3 having a spring property and the metal post 4 contacting it come into contact, and the ground (GNI) level of the circuit board unit 1.2 becomes the same potential level.

To explain this part in detail, see the second section. It is shown in FIG. FIG. 1 shows the state before circuit board unit 1 and circuit board unit 2 are set.

When the circuit board unit 1 and the circuit board unit 2 are set, as shown in FIG.
The two ground (GND) levels are the same.

In the embodiments described above, the circuit board unit 1.2
The ground (GND) level of is at the same potential level. Therefore, it is possible to prevent noise generation from above the circuit board unit, which is effective as a countermeasure against KM (electromagnetic interference).

〔Effect of the invention〕

As explained above, the method of connecting circuit board units using metal pieces having spring properties according to the present invention does not rely on cores, ferrite beads, etc. as parts for preventing noise generation, and uses a simple processing method. It is highly effective in countering electromagnetic interference (electromagnetic interference).

In addition, reducing the area of the circuit board unit by reducing the number of cores, ferrite beads, etc. used as noise prevention components also represents an achievement from the perspective of the overall product.

[Brief explanation of the drawing]

FIG. 1 is an external view of circuit board units 1 and 2 when they are set. FIG. 2 is an explanatory diagram of the attachment of the metal piece 3 having spring properties and the metal post 4 that contacts it before the circuit board units 1 and 2 are set. FIG. 3 is an explanatory diagram of the attachment of the metal piece 3 having spring properties and the metal post 4 that contacts it when the circuit board units 1 and 2 are set. that's all

Claims (1)

[Claims] In an electronic device that electrically connects circuit board units to each other via a connector, a metal piece having spring properties in the insertion direction of the connector and a metal post that comes into contact with the metal piece when the connector is inserted are used. Features: Connection method between circuit units.