JP2015005400A - Electronic device with electric leak detection function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, if a cover member is provided for covering an electrode member and mounted to a circuit board and a push-button is provided not in a lid member but on a top face of the cover member, relative positions of the electrode member and the push-buttons are unlikely to be dislocated but since the cover member becomes relatively small, if a finger slips and exceeds the push-button when pressing the push-button, the finger may get out of the top face of the cover member and touch an electronic component on the circuit board.SOLUTION: A cover member which covers a pair of electrode members is mounted to the circuit board, and the push-button is held on a top face of the cover member, and the cover member includes a wall part for preventing a finger from getting out of the top face of the cover member over the push-button when the push-button is pressed with the finger.

Description

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

  For example, as an electronic device for controlling a device, a power supply unit that lowers 100-volt AC power supplied from an external commercial power supply to a necessary voltage, and operation of a load in the device by receiving power supply from the power supply unit There is known a control unit that controls the leakage current provided on the same circuit board, and further provided with a leakage detection function for detecting the presence or absence of leakage in the device (for example, Patent Document 1). reference).

  However, in order to have a leakage detection function, it is necessary to provide a test switch and a reset switch. In this regard, the pair of electrode members constituting the switch are soldered in a state of standing on the circuit board with a gap, and one electrode member is pressed to be elastically deformed and brought into contact with the other electrode member. The switch is configured to turn on the switch (see, for example, Patent Document 2).

JP-A-9-182278 (FIG. 1) Japanese Patent Laying-Open No. 2004-191009 (paragraph 0043, FIG. 11)

  In the electronic device described in Patent Document 2, the electrode member is housed in a casing, and a push button for pressing one electrode member on a lid member that engages with the casing and covers the entire opening of the casing. Is held. Therefore, if the positioning of the lid member and the circuit board is shifted, there arises a problem that one of the electrode members cannot be accurately pressed with the push button.

  In such a case, a cover member that covers both electrode members is provided, and the cover member is attached to the circuit board. If the push button is provided on the upper surface of the cover member instead of the cover member, the electrode member and the push button are provided. The relative position is difficult to shift. However, since the cover member is relatively small, when the finger slides over the push button when the push button is pressed, the finger may come off the upper surface of the cover member and touch the electronic components on the circuit board.

  Also, if the circuit board is mounted vertically when the electronic device is installed in the device, when water or the like flows from above, the water flows on the upper surface of the cover member, and the cover is held from the portion holding the push button. There is a risk that water may enter the member.

  Therefore, in view of the above problems, the present invention is such that when the cover member is attached to the circuit board, it is difficult for the finger to come off from the upper surface of the cover member even if the finger slides on the push button, and the circuit board is placed in a vertical state. It is an object of the present invention to provide an electronic device having a leakage detection function that prevents water or the like from entering the inside of the cover member from the upper surface of the cover member even when held.

  In order to solve the above problems, an electronic device having a leakage detection function according to the present invention includes a leakage detection unit on a circuit board, and a pair of contact members constituting a switch necessary for the leakage detection unit are attached to the circuit board. In the electronic apparatus having a leakage detection function provided with a push button for bringing one contact member into contact with the other electrode member by pressing one contact member, the cover member covering the pair of electrode members is A wall portion that is attached to the circuit board, holds the above-mentioned push button on the upper surface of the cover member, and prevents the finger from moving over the push button and coming off the upper surface of the cover member when the push button is pushed with a finger. The cover member is provided.

  Since the cover member is provided with the wall portion, even if the push button is pressed quickly, for example, the finger slides on the push button and comes off the upper surface of the cover member, and the finger is prevented from touching other electronic components.

  In addition, when using the said wall part hold | maintaining the said circuit board in a perpendicular state, it is desirable to form so that the said pushbutton may be covered from upper direction. With this configuration, even when water or the like is dripped from above onto the cover member, water or the like is prevented from entering the cover member from the portion holding the push button.

  As apparent from the above description, in the invention according to claim 1, when the cover member is attached to the circuit board, the finger is unlikely to come off from the upper surface of the cover member even if the finger slides on the push button. In the invention according to claim 2, even if the circuit board is held in a vertical state, water or the like hardly enters the cover member from the upper surface of the cover member.

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

  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, this switch member 3 includes a cover member 4 that covers the whole, one movable electrode member 5 that is attached to a position covered by the cover member 4, and two fixed electrode members 6. It is configured. The cover member 4 holds 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, in a movable state in the vertical direction. A mountain-shaped collar portion (wall portion) 42 is provided on the upper surface of the cover member 4 to surround the two push buttons 41 from one side.

  The movable electrode member 5 has a pair of elastically deformable movable pieces 51. When the push button 41 is depressed, the movable electrode member 5 is depressed downward by the lower end 41a of the push button 41, and the movable piece 51 is bent downward. ing.

  Referring to FIG. 3, when pressing the push button 41 with the finger F, the finger F is applied to the push button 41 from the direction in which the collar portion 42 is not provided. If the finger F is not surely confirmed or if the finger F is applied to the push button 41 vigorously, the finger F may slide on the upper surface of the push button 41 and the finger F may move unnecessarily to the left side of the drawing. When the finger F moves largely to the left side, the finger F is detached from the upper surface of the cover member 4. However, as shown in the figure, since the heel portion 42 is provided on the left side of the push button 41, the finger F It is prevented from coming into contact with 42 and moving to the left side of the flange 42.

  Although FIG. 3 has been described with the circuit board 11 being in a horizontal state, the circuit board 11 is actually mounted in the apparatus in a vertical state as shown in FIG. And as shown in FIG. 1, when the circuit board 11 was attached in the perpendicular | vertical state, the collar part 42 was comprised so that the both push button 41 might be covered from upper direction.

  Referring to FIG. 4, circuit board 11 is potted, but inside cover member 4, electrode members 5 and 6 are present without being coated with resin. When water is dripped onto the cover member 4 from above, it is necessary to prevent water from entering the cover member 4 through the gap between the push button 41 and the cover member 4. Since the collar portion 42 covers the push button 41 from above, the dropped water is divided into left and right along the upper surface of the collar portion 42, so that the water does not reach the push button 41. Therefore, water can be prevented from entering the cover member 4.

  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 Cover member 41 Push button 42 Gutter part (wall part)
5 movable electrode member 51 movable piece 6 fixed electrode member

Claims (2)

  A circuit board is provided with a leakage detection unit, and a pair of contact members constituting a switch necessary for the leakage detection unit is attached to the circuit board. By pressing one contact member, this one contact member is connected to the other electrode member. In an electronic device having a leakage detection function including a push button that is in contact with the cover member, a cover member that covers the pair of electrode members is attached to the circuit board, and the push button is held on an upper surface of the cover member; and An electronic device having an electrical leakage detection function, wherein a wall portion is provided on the cover member for preventing the finger from going over the push button and coming off the upper surface of the cover member when the push button is pressed with the finger. 2. The electronic device with a leakage detecting function according to claim 1, wherein the wall portion is formed so as to cover the push button from above when the circuit board is used in a vertical state. .

Images