JP6091350B2 - Electronic device with leakage detection function - Google Patents

Description

  The present invention relates to an electronic device having a leakage detection function on a circuit board.

  For example, when controlling a device, an electronic device for control includes a power supply unit that steps down 100 volt AC power supplied from an external commercial power source to a necessary voltage, and a power supply unit that receives power from the power supply unit. A control unit that controls the operation of the load and a leakage detection unit that detects the presence or absence of leakage in the device are provided.

  An electronic device in which the power supply unit, the control unit, and the leakage detection unit are provided on a single circuit board to form a single unit is known (for example, see Patent Document 1).

  Among them, the earth leakage detection unit requires a test switch and a reset switch, so the pair of electrode members constituting these switches are soldered in a state of standing on the circuit board with a gap between them, and one of the electrodes The switch is turned on by pressing and elastically deforming the member and bringing it into contact with the other electrode member.

Japanese Patent Laying-Open No. 2004-191009 (paragraph 0043, FIG. 11)

  In the conventional electronic device, the electrode member is housed in a casing, and a button for pressing one electrode is held on a lid member that engages with the casing and covers the entire opening of the casing. For this reason, if the positioning of the lid member and the circuit board is shifted, there is a problem that one electrode member cannot be pressed accurately with a button. Further, when the design of the arrangement of the electrode member is changed, it is necessary to change the lid member together.

  Therefore, in view of the above problems, the present invention provides an electronic device having a leakage detection function that facilitates positioning of one electrode member and a button that presses one electrode member and has a high degree of freedom in layout of the electrode member. The issue is to provide.

In order to solve the above-described problems, an electronic device having a leakage detection function according to the present invention includes a leakage detection unit on a circuit board, and two types of electrode members constituting a switch necessary for the leakage detection unit are attached to the substrate. In the electronic device having a leakage detection function in which one of the electrode members is pushed and elastically deformed toward the other electrode member so that both electrode members are brought into contact with each other, the two types of electrode members are covered and the one inner provided with a cover having a button to press the electrode member, and pressing the one electrode member in a state of attaching the cover to the circuit board, pressing portions of the cover to make one electrode member from tilting before soldering It is characterized by being formed.

  Since the button that presses the electrode member is attached to the cover that covers the electrode member, there is no possibility that the positioning of the electrode member and the button is not shifted. Note that the electrode member is not fixed simply by attaching the electrode member to the circuit board, and may be inclined. The cover may be attached to the circuit board after first soldering and fixing, but in the process of assembling the parts to the circuit board, after assembling the electrode member, the assembly work is temporarily suspended and soldering is performed again. Returning to the assembly process, the cover is attached. On the other hand, when the electrode member is assembled to the circuit board and the cover is also assembled, the button of the cover pushes and tilts the electrode member, and if it is soldered as it is, the electrode member may be fixed while being tilted.

  However, in the above configuration, even if the cover is attached before the electrode member is fixed, the pressing portion of the cover holds the electrode member so that the electrode member does not tilt, and the electrode member is fixed by soldering in that state. be able to.

  Two other electrode members are arranged side by side, one electrode member is formed by one, an elastic deformation part facing each of the other electrode members is formed on the one electrode member, and the pressing part is If the position sandwiched between the two elastically deforming portions is pressed, two contact points can be constituted by three electrode members.

  As is apparent from the above description, the present invention is not a lid member for a casing that houses a circuit board, but is provided on a cover that is attached to the circuit board and covers the electrode member. Since it is configured, the button and the electrode member can be easily positioned, and the degree of freedom of the switch layout can be increased.

The figure which shows the structure of one embodiment of this invention Exploded perspective view of switch member III-III cross section

  Referring to FIG. 1, reference numeral 1 is an example of an electronic apparatus having a leakage detection function according to the present invention. The electronic device 1 is a circuit board 11 housed in a casing 12 and potted. On the circuit board 11, a commercial AC power supplied from outside is stepped down to a predetermined voltage or rectified and supplied to each load (not shown), and a DC operating power is supplied from the power supply unit. In response, a control unit that controls the operation of each load and a leakage detection unit 2 are provided. In order to facilitate understanding of the following description, only the leakage detection unit 2 is shown in the figure, and the other power supply unit and control unit are omitted.

  The electronic device 1 is held in a horizontal state at the time of manufacture. However, when the electronic device 1 is incorporated in a device (not shown), the electronic device 1 is attached in a vertical state as shown in the drawing.

  A switch member 3 having a test switch and a reset switch is provided in the leakage detector 2.

  Referring to FIG. 2, the switch member 3 includes a cover 4 that covers the whole, one movable electrode 5 that is attached to the cover 4, and two fixed electrodes 6. A push button 41, which is a component part of the test switch, and a push button 41, which is a component part of the reset switch, are held in the cover 4 so as to be movable in the vertical direction. And the mountain-shaped collar part 42 which covers these two push buttons 41 from one side is provided in the upper surface of the cover. A pressing portion 43 described later is formed integrally with the cover 4 inside the cover 4. The cover 4 is configured to be fixed to the circuit board 11 by a pair of claw portions 44.

  The movable electrode 5 has a pair of elastically deformable movable pieces (elastically deformable portions) 51, and the movable piece 51 is bent downward by the push button 41 when the push button 41 is depressed. The movable electrode 5 is provided with a pair of grip portions 52, and the grip portions 52 are gripped by a loader and mounted on the circuit board 11. A pair of fixed claws 53 bent downward are formed between the gripping portions 52, and the movable electrodes 5 are connected to the circuit by inserting the fixed claws 53 into the mounting holes 13 formed in the circuit board 11. Mounted on the substrate 11.

  On the other hand, the fixed electrode 6 is also held by a loader, and is mounted by inserting a fixed claw 61 formed in the lower part into an attachment hole formed in the circuit board 11.

  However, in a state where it is mounted by the loader, the movable electrode 5 and the fixed electrode 6 are merely inserted into the mounting holes, and thus are not firmly fixed to the circuit board 11. By soldering the movable electrode 5 and the fixed electrode 6 to the circuit board 11 in such a mounted state, the movable electrode 5 and the fixed electrode 6 are firmly fixed to the circuit board 11. By attaching the cover 4 to the circuit board 11 before the soldering process, the process after soldering is omitted.

  However, when the cover 4 is attached to the circuit board 11, the push button 41 pushes down the movable piece 51, and the movable electrode 5 that is not firmly fixed may be inclined. Therefore, when the cover 4 is attached to the circuit board 11, the movable electrode 5 is pressed by the pressing portion 43 so that the movable electrode 5 does not tilt.

  Referring to FIG. 3, in this figure, when the cover 4 is attached to the circuit board 11, the push button 41 presses the movable piece 51 from above, so that the movable electrode 5 tends to tilt to the left. However, since the pressing portion 43 formed inside the cover 4 presses the grip portion 52 located on the right side from above and presses the right grip portion 52 against the circuit board 11, the movable electrode 5 is held without tilting. Is done. When the fixing claw 53 is soldered to the lower surface of the circuit board 11 in this state, the movable electrode 5 is fixed to the circuit board 11 without being inclined.

  In addition, since the movable electrode 5 is shared with respect to both of a pair of fixed electrodes 6, two contacts can be comprised by three electrodes.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Electronic device 11 Circuit board 2 Earth leakage detection part 3 Switch member 4 Case 43 Holding part 5 Movable electrode 51 Movable piece 52 Grip part 53 Fixed claw 6 Fixed electrode

Claims (2)

A circuit board is provided with a leakage detection unit, and two types of electrode members constituting a switch necessary for the leakage detection unit are attached to the substrate, and one of the electrode members is pushed and elastically deformed toward the other electrode member. In an electronic apparatus having a leakage detection function in which both electrode members are brought into contact with each other, a cover having a button for covering the two types of electrode members and pressing the one electrode member is provided, and the cover is attached to the circuit board in pressing the one electrode member above, an electronic apparatus having a leakage detection function, characterized in that one electrode member pressing portion to prevent tipping before soldering is formed on the inside of the cover. Two of the other electrode members are arranged side by side, one electrode member is formed by one, an elastically deforming portion that faces the other electrode member is formed on the one electrode member, and the holding portion is bielastic. The electronic device with a leakage detection function according to claim 1, wherein a position sandwiched between the deforming portions is pressed.

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