JPH0644139Y2 - Electronic component mounting device - Google Patents

Description

[Detailed Description of the Invention] "Industrial application field" This invention is a device for mounting an electronic component having an operation shaft such as a potentiometer or a switch to a panel, in particular, the inside of the panel is sealed and the operation shaft is inside. The present invention relates to a mounting device for electronic components when mounted as described above.

“Prior Art” FIG. 6 shows a typical conventional attachment structure of an electronic component having an operation shaft to a panel. For example, one end surface of the case 22 of the electronic component 21 such as a rotary switch is provided with a cylindrical mounting portion 23 having a screw formed on the outer peripheral surface, and the tip of the mounting portion 23 is inserted through the mounting portion 23. An operation shaft 24 is projected from the. To mount this electronic component 21 on the panel 25,
First, the mounting portion 23 is inserted into the mounting hole 26 formed in the panel 25, and the nut 27 is screwed from the tip of the mounting portion 23.
By sandwiching the panel 25 with
It is carried out by fixing it to 25 and then attaching a knob 28 to the tip side of the operating shaft 24. The operation shaft 24 to which the knob 28 is attached is located on the outer side (operation surface side) 29 of the panel 25,
The knob 28 rotates the operation shaft 24 to operate the electronic component 21 to a desired state.

On the other hand, when it is necessary to mount the operation shaft inside the panel as in the case of operating the electronic component by connecting the operation shaft to the movable mechanism housed in the panel, the conventional method is used. 6 has a mounting structure in which the inside and outside of the panel 25 are reversed in FIG. 6, that is, the case 22 is located on the outer side 29 of the panel 25, the outer side 29 inserts the mounting portion 23 into the mounting hole 26, and is fixed by the nut 27 from the inner side. Was.

"Problems to be solved by the invention" In the conventional mounting structure of electronic parts with the operating shaft inside, the case of the electronic parts located outside the panel is much larger than the panel, which is a problem. Also, since the nuts must be tightened from the inside of the panel, the mounting work was extremely difficult.

An object of the present invention is to prevent an electronic component from significantly protruding to the outside of the panel, to easily perform the mounting work, and to prevent the sealing from being damaged when the inside of the panel is hermetically sealed. It is to provide a mounting device.

[Means for Solving the Problem] According to the present invention, a mounting hole similar to the outer peripheral shape of an electronic component is formed in a panel whose inner side is hermetically sealed, and the electronic component has an operating shaft as its inner side in the mounting hole. When fitted, a ring-shaped groove is formed on the outer peripheral surface of the electronic component so as to face the inner peripheral surface of the mounting hole, and an O-ring is fitted in the ring-shaped groove, and the O-ring is fitted to the inner peripheral surface of the mounting hole. The mounting portion, which is elastically contacted and is formed to project on the outer peripheral surface of the electronic component, is mounted in contact with the outer surface of the panel.

"Operation" Since the electronic component is fitted in the mounting hole of the panel, the electronic component does not largely project to the outside of the panel, and the electronic component is fixed from the outside of the panel by the mounting portion that contacts the outer surface of the panel.

Further, the mounting hole of the panel is sealed by the electronic component and the O-ring, and water and oil are prevented from entering the panel through the mounting hole.

"Embodiment" FIG. 1 shows a first embodiment of the present invention. The inner side 2 of the panel 1 made of metal or plastic, which is not shown, is sealed. The panel 1 is provided with a mounting hole 4 communicating from the inner side 2 to the outer side 3. The mounting hole 4 is similar to the outer peripheral shape of the electronic component 5 to be mounted and is slightly larger. In this example, the case of the electronic component 5 has a cylindrical shape, and the mounting hole 4 is a circular hole. A screw hole 7 for mounting the mounting portion 6 of the electronic component 5 is formed on the outer surface of the panel 1.

FIG. 2 is an external view of a potentiometer shown as an example of the electronic component 5 used in the first embodiment. (A) is a front view,
(B) is a side view.

In this potentiometer, a cylindrical case 8 accommodates a movable body, to which an insulating substrate having a resistor and a current collector (not shown) and a slider are attached. The movable body is attached to the operation shaft 9, and the operation shaft 9 projects from one end surface of the case 8. When the operation shaft 9 is moved, the slider slides on the resistor and the current collector. From the insulating substrate, the terminal 11 is led out from the other end surface of the case 8. This lead-out is a sealed structure. A mounting portion 6 is provided on the outer peripheral surface of the case 8 on the terminal 11 side so as to project in the diameter direction. The mounting portion 6 is provided with a hole 12 for screwing. A ring-shaped groove 13 is formed around the outer circumference of the case 8, and an O-ring 14 shown in FIG. 3 is fitted into the groove 13. The O-ring 14 is made of silicone rubber.

The potentiometer with the O-ring 14 attached, that is, the electronic component 5 is fitted into the mounting hole 4 of the panel 1 so that the operating shaft 9 is on the inner side 2 and passed through the hole 12 of the mounting portion 6 as shown in FIG. The screw 15 is screwed into the screw hole 7, the mounting portion 6 is brought into contact with the outer surface of the panel 1 and stopped, and the potentiometer (electronic component) 5 is mounted on the panel 1. At this time, O-ring
The positions of the mounting portion 6 and the ring-shaped groove 13 are selected so that the elastic contact of 14 with the inner peripheral surface of the mounting hole 4 is made.

Therefore, since the mounting hole 4 of the panel is closed by the potentiometer case 8 and the O-ring 14, water and oil are prevented from entering the panel.

The O-ring 14 generates an elastic force only in the diameter direction of the mounting hole 4 of the panel 1 and does not act in the direction in which the electronic component 5 comes off. Therefore, the mounting strength for mounting the electronic component 5 on the panel 1 may be small. Therefore, only one mounting portion 6 of the electronic component 5 is sufficient. Therefore, the electronic component 5 can be miniaturized. The case 8 may have one ring-shaped groove 13, but it is preferable to provide two ring-shaped grooves 13 and attach an O-ring 14 to each of the ring-shaped grooves 13.

FIG. 4 shows a second embodiment of the present invention, and FIG. 5 shows an appearance of a potentiometer as an electronic component 5 used in the second embodiment, in which parts corresponding to FIGS. 1 and 2 are shown. Are given the same reference numerals. In this example, electronic component 5
This is the case where there are two mounting portions 6 and one O-ring 14.

[Advantage of Invention] As described above, according to the present invention, the electronic component is fitted into the mounting hole of the panel, so that the electronic component does not become a hindrance and the electronic component is mounted on the panel from the outside by the mounting portion that is in contact with the outer surface of the panel. Since it can be fixed to, the mounting work can be easily performed. Further, since the O-ring is attached to the case of the electronic component and the attachment hole of the panel is closed by the case and the O-ring, water and oil are prevented from entering the inside of the panel. Therefore, in the panel whose inside is hermetically sealed, the hermeticity is not impaired by the mounting of electronic components.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a first embodiment of the present invention, and FIG.
Fig. 1 is an external view of the electronic component used in Fig. 1, (a) is a front view, (b) is a side view, Fig. 3 is a perspective view of the O-ring used in the present invention, and Fig. 4 is this. FIG. 5 is a partial sectional view showing a second embodiment of the invention, FIG. 5 is an external view of an electronic component used in FIG. 4, (a) is a front view, (b) is a side view, and FIG. It is a fragmentary sectional view which shows the attachment structure of components.

Continuation of the front page (56) References Microfilm (JP, U) of the specification and drawings attached to the application for Japanese Patent Application No. 49-106622 (Japanese Utility Model Application No. 51-34307)

Claims (1)

[Scope of utility model registration request] 1. A mounting device for an electronic component, wherein an electronic component having an operating shaft is mounted on a panel whose inside is hermetically sealed, with the operating shaft being inside, wherein the mounting is similar to the outer peripheral shape of the electronic component on the panel. A hole is formed, and the electronic component is fitted into the mounting hole with the operating shaft inside, and a ring-shaped groove is formed on the outer peripheral surface of the electronic component facing the inner peripheral surface of the mounting hole. An O-ring is fitted into the groove, and the O-ring elastically contacts the inner peripheral surface of the mounting hole, and the mounting portion projectingly formed on the outer peripheral surface of the electronic component is mounted so as to be in contact with the outer surface of the panel. A mounting device for electronic components.