JPH06162872A - Operation switch for printed circuit board - Google Patents

Abstract

PURPOSE:To maintain a constant gap between an operation panel front and a printed circuit board front, and allow an easy work for replacing a switch section. CONSTITUTION:A support member 5 for housing a switch section 3 is provided between an operation panel 11 and a printed circuit board 1. The rear end of the member 5 is connected to the board 1, and the cylindrical section 5a of the member 5 inserted in the hole 11a of the panel 11 at a front end is coupled and fixed in such a way that the stepped section 7a of a nut 7 is engaged with the upper end of the section 5a from the front of the panel 11. Also, a screw 6 is inserted from the rear side of the panel 11 and kept in contact therewith, thereby mounting the panel 11. Furthermore, a gap between the front of the board 1 and the front of the panel 11 is determined by the board 1 and the nut 7 having the stepped section 7a coupled to the cylindrical section 5a of the support member 5 mounted on the board 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board operating switch such as a rotary switch mounted on a printed circuit board incorporated in an operating panel.

[0002]

2. Description of the Related Art FIG. 2 shows a cross-sectional view of a rotary switch, for example, as a conventional printed circuit board operation switch. In the figure, 11 is an operation panel such as a control panel, 12 is a printed circuit board incorporated in the operation panel 11, and a switch portion 13 is directly fixed and attached by soldering to the front surface thereof. Reference numeral 14 denotes an operation shaft for operating the switch unit, and an operation unit (not shown) is attached to the tip of the operation shaft. Reference numeral 17 denotes a cylindrical portion having the threaded portion 17a on the outer periphery which is inserted into the hole 11a of the operation panel 11 into which the operation shaft 14 is inserted, and the washer 15 and the nut 16 are attached to the threaded portion 17a from the front surface of the operation panel 11. It is fitted. Reference numeral 18 is a nut for setting the distance of the printed circuit board 12 from the operation panel 11 fitted in the screw portion 17a of the cylindrical portion 17.

In the assembly of the rotary switch having the above-described structure, first, the switch portion 13 having the tubular portion 17 is directly attached to the front surface of the printed board 12 by soldering. Then, the nut 18 is fitted into the threaded portion 17a of the tubular portion 17. Then, attach the nut 18 to the printed circuit board 12 from the operation panel 11.
The heights of the printed circuit board 12 and the operation panel 11 are set by moving them up and down according to the distance. Next, the tubular portion 17 is inserted into the hole portion 11a of the operation panel 11 so that the nut 18 comes into contact with the rear surface thereof, and the operation panel is inserted into the screw portion 17a of the tubular portion 17.
11 By tightening the washer 15 and the nut 16 from the front surface, the space between the printed board 12 and the operation panel 11 can be maintained.

Further, as another method for maintaining the space between the operation panel 11 and the printed circuit board 12, a spacer is provided between the operation panel 11 and the printed circuit board 12 without using the above-mentioned washer 15 and nuts 16 and 18. There is a method of using 19. The spacing piece 19 has its tip end attached to the back surface of the operation panel 11 by welding, and its rear end portion is a screw hole provided on the front surface of the printed board 12 at its rear end portion.
A tightening screw 20 is attached to 19a by screwing it from the back surface of the printed circuit board 12 to keep the gap between the operation panel 11 and the printed circuit board 12 constant.

[0005]

However, in the conventional printed circuit board operation switch, in the former case, the gap between the operation panel and the printed circuit board is set in the threaded portion of the tubular portion of the switch portion. Since the nut is moved up and down, the height dimension accuracy between the printed circuit board and the operation panel is difficult to obtain, and it is not necessary to mount a plurality of switches on the printed circuit board. Further, there is a drawback that the printed circuit board is adversely affected by a pressing force applied to the printed circuit board or a tension applied to the solder portion depending on the variation in the respective intervals.

In the latter case, since the spacing piece is used to maintain the spacing between the operation panel and the printed circuit board, the verticality and height dimensional accuracy during and after welding the spacing piece to the operation panel are high. It was important, and there was a drawback that it took a lot of time and effort to make it. Furthermore, when replacing the switch part, you must remove the nut and washer from the tubular part of the switch part and remove it from the operation panel, remove the solder part from the switch part and remove it from the printed circuit board. It had the drawback of being difficult.

Therefore, a first object of the present invention is to provide an operation switch for a printed circuit board, which can maintain a constant distance between the front surface of the operation panel and the front surface of the printed circuit board. A second object of the present invention is to provide a printed circuit board operation switch that facilitates replacement work of the switch section.

[0008]

In order to achieve the above-mentioned first object, the printed circuit board operation switch according to the first embodiment of the present invention is provided with a switch portion and is spaced from the operation panel by a predetermined distance. In a printed circuit board operating switch having a printed circuit board to be arranged, and a switch section attached to the printed circuit board is operated from the front side of the operation panel, a recess for accommodating the switch section and the operation panel at the front end are provided. A support member is provided, which penetrates through the provided hole portion and protrudes from the operation panel to the front side, and into which the operation shaft of the switch portion is inserted, the rear end portion of which is provided with a support member attached to the printed circuit board. A cylindrical portion integrally provided with a holding means for holding a support member in contact with the back surface of the operation panel, the support member protruding from the hole of the operation panel. Its stepped portion for the upper end engaging the tubular portion to secure the nut provided on the inner peripheral surface, characterized in that mounted on the operation panel is brought into contact with the retaining means on the back surface of the operation panel.

In order to achieve the second object, the printed circuit board operation switch of the second embodiment of the present invention has a printed circuit board to which a switch portion is attached and which is arranged at a predetermined distance from the operation panel. Then, in the printed circuit board operation switch in which the switch part attached to the printed circuit board is operated from the front of the operation panel, the recess for accommodating the switch part and the hole provided in the operation panel at the front end are penetrated. Has a tubular portion projecting to the front from the operation panel and into which the operating shaft of the switch portion is inserted, the rear end portion of which is provided with a support member attached to the printed circuit board, and the support member is integrally coupled to the support member. Holding means for contacting the back surface of the operation panel to hold the support member is provided, and the support member is engaged with the upper end of the tube portion on the tube portion protruding from the hole of the operation panel. The stepped portion is fixed to the inner peripheral surface of the nut, the holding means is brought into contact with the rear surface of the operation panel and attached to the operation panel, and the switch portion is electrically connected to the printed circuit board via detachable connectors. It is characterized in that they are connected to each other.

[0010]

According to the above-described structure, the support member having the rear end portion attached to the printed circuit board has the tubular portion of the front end thereof inserted into the hole portion of the operation panel so that the stepped portion of the nut is inserted from the front surface of the operation panel. The upper portion of the operation panel is engaged and fixed, and the holding means is attached to the operation panel by contacting the holding means from the back surface of the operation panel with the back surface of the operation panel and the front surface of the operation panel and the front surface of the printed circuit board. It is determined by the lower end of the nut fixed to the cylinder of the support member attached to the board. The switch section can be removed by disconnecting the connector from the printed circuit board.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the structure of a rotary switch showing an embodiment of the present invention. The same members as those of the conventional device are designated by the same reference numerals and the description thereof is omitted. In the figure,
1 is a printed circuit board on which a connector 2 is mounted,
Reference numeral 3 denotes a switch portion having a connector 4 which is attachable to and detachable from the connector 2 at a lower end portion thereof, and the switch portion 3 is electrically connected to the printed board 1 by coupling the connector 4 to the connector 2 of the printed board 1. To be done. Reference numeral 5 denotes a support member arranged between the printed circuit board 1 and the operation panel 11. The support member 5 includes a recess 5e for accommodating the switch portion 3 and a hole portion of the operation panel 11 at a front end portion. 11
It has a tubular portion 5a penetrating a and protruding to the front from the operation panel 11 and into which the operating shaft 14 of the switch portion 3 is inserted. The rear end portion is screwed to the printed circuit board 1 by a tightening screw 20. Mounted.

In the recess 5e of the support member 5 for accommodating the switch portion 3, an engaging projection 5b engaging with the lower end portion of the switch portion 3 and an engaging step portion 5c engaging with the upper end of the switch portion 3 are formed. Is provided, and the switch portion 3 is engaged with the engagement protrusion 5b and the engagement step portion 5c by inserting the switch portion 3 into the recess 5e. In addition, protrusions are provided on both sides of the support member 5.
5d is provided, and a screw 6 that is integrally coupled to the protruding portion 5d and that holds the support member 5 with the tip end abutting by tightening is provided on the back surface of the operation panel 11. 7 is a cylindrical portion 5a inserted into the hole 11a of the operation panel 11.
Is a nut that is fitted to the threaded portion of the operation panel 11 from the front side, and a stepped portion 7a that engages with the upper end of the tubular portion 5a by fitting the nut 7 to the tubular portion 5a is provided on the inner peripheral surface of the nut 7. It is provided. In addition, a packing 8 is provided on the bearing surface and the inner peripheral surface of the nut 7.
Is fitted in to prevent water, oil, etc. from entering the operation panel 11 through the hole 11a of the operation panel 11. Further, the printed circuit board 1 is provided with a hole portion 1a into which a driver or the like for tightening the screw 6 is inserted.

In the procedure for assembling the rotary switch having the above-described structure, first, the switch portion 3 is attached to the printed circuit board 1 by connecting the connector 4 at the lower end thereof to the connector 2 of the printed circuit board 1. Then, the recess 5e of the support member 5 is inserted from above the switch portion 3, and the engaging protrusion 5b is engaged with the lower end portion of the switch portion 3 and the engaging step portion 5c is engaged with the upper end portion of the switch portion 3. The support member 5 to the switch unit 3. The rear end portion of the support member 5 is attached to the printed circuit board 1 from the rear surface of the printed circuit board 1 by screwing a fastening screw 20. And the support member 5
Insert the tubular portion 5a of the operation panel 11 into the hole 11a of the operating panel 11 from the rear side thereof, and from the front surface of the operating panel 11, insert the nut 7 into the threaded portion of the tubular portion 5a and the step 7a of the nut 7 into the upper end of the tubular portion 5a. Install it on the operation panel 11 by tightening it until it touches. Then, the screw 6 of the projecting portion 5d provided on both side surfaces of the support member 5 located on the back surface of the operation panel 11 is rotated by a screwdriver inserted through the hole 1a of the printed circuit board 1 to operate the operation panel 11
The tip of the screw 6 is brought into contact with the back surface of the operation panel 11 so as to make it tight between the support member 5 and the support member 5. By the tightening of the screw 6, the lower end of the nut 7 and the front surface of the operation panel 11 come into contact with each other, and the space between the operation panel 11 and the printed circuit board 1 is maintained.

Thus, the operation panel 11 and the printed circuit board 1
The space between the support member 5 mounted on the printed circuit board 1
And the stepped portion 7a of the nut 7 fitted to the tubular portion 5a.
Therefore, the distance between the front surface of the operation panel 11 and the front surface of the printed circuit board 1 is always kept constant regardless of the thickness of the operation panel. Also, to replace the switch unit 3,
First, the fastening screw 20 screwed to the rear end of the support member 5 attached to the printed circuit board 1 is removed, and the printed circuit board 1 is attached to the connector 2 and the connector 4 of the switch section 3.
The connection with is removed and the support member 5 is removed. Then, the support member 5 in which the switch portion 1 is housed in the recess 5e
The switch portion 3 can be removed from the support member 5 by expanding the rear end portion outward to disengage the engagement portion 5b from the lower end portion of the switch portion 3 and pulling the switch portion 3 downward. Then, the switch portion to be replaced is inserted into the recess 5e of the support member 5, the upper end portion thereof is engaged with the engaging step portion 5d, and the lower end portion thereof is engaged with the engaging protrusion 5b to be housed.
The connector 2 of the printed circuit board 1 is connected to the connector 4 of the printed circuit board 1 and the printed circuit board 1 is tightened with the fastening screw 20.
It may be attached by screwing from the back surface to the rear end of the support member 5. In this way, the replacement work of the switch unit 3 can be easily performed. Further, in the replacement work of the switch portion, the tubular portion 5a of the support member 5 on the front surface of the operation panel 11
Since it can be done without removing the nut 7 fitted to the
The nut 7 does not damage the front surface of the operation panel 11.

[0015]

As described above, according to the first aspect of the present invention, the switch section is mounted, and the printed circuit board is arranged at a predetermined distance from the operation panel and is mounted on the printed circuit board. In a printed circuit board operation switch in which the switch part is operated from the front side of the operation panel, a recess for accommodating the switch part and a hole provided in the operation panel at the front end portion are protruded to the front side from the operation panel, Further, a supporting member having a tubular portion into which the operating shaft of the switch portion is inserted and having a rear end portion attached to the printed circuit board is provided, and the supporting member is integrally coupled to the supporting member and abuts against a back surface of the operating panel. A nut provided with a holding means for holding the support member, and a step portion which engages with the upper end of the tubular portion on the inner peripheral surface of the tubular portion projecting from the hole of the operation panel. By fixing and holding the holding means in contact with the back surface of the operation panel and attaching it to the operation panel, the gap between the operation panel and the printed circuit board is the tubular portion of the support member attached to the printed circuit board, and this tubular portion. Since it is determined by the nut provided with the stepped part that is fitted to, the distance between the printed circuit board front surface and the operation panel front surface can always be kept constant regardless of the thickness of the operation panel, and when mounting multiple switches. It is convenient.

According to the invention described in claim 2,
By electrically connecting the switch section to the printed circuit board via removable connectors, the switch section can be easily removed from the printed circuit board, and the switch section can be replaced easily. It can be done without removing the nuts on the top of the panel, so the front of the operation panel will not be damaged.

[Brief description of drawings]

FIG. 1 is a sectional view of the configuration of a rotary switch showing an embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of a rotary switch showing a conventional example.

[Explanation of symbols]

 1 Printed Circuit Board 2 Connector 3 Switch Part 4 Connector 5 Support Member 5a Tube Part 5e Recess 6 Screw 7 Nut 7a Step 11 Operation Panel 11a Hole 14 Operation Axis

Claims (2)

[Claims] 1. An operation for a printed circuit board, comprising a printed circuit board to which a switch portion is attached and arranged at a predetermined distance from an operation panel, and the switch portion attached to the printed circuit board is operated from the front surface of the operation panel. The switch has a recess for accommodating the switch part, and a cylindrical part at a front end thereof that penetrates a hole provided in the operation panel and projects to the front of the operation panel, and into which the operation shaft of the switch part is inserted. A support member having a rear end portion attached to the printed circuit board, integrally connected to the support member, and holding means for holding the support member in contact with the back surface of the operation panel. A nut having a stepped portion that engages with the upper end of the cylindrical portion is fixed to the cylindrical portion protruding from the hole of the panel, and the holding means is abutted on the rear surface of the operation panel. PCB operating switch, characterized in that mounted on the operation panel Te. 2. An operation for a printed circuit board, comprising a printed circuit board to which a switch portion is attached and arranged at a predetermined distance from an operation panel, and the switch portion attached to the printed circuit board is operated from the front surface of the operation panel. The switch has a recess for accommodating the switch part, and a cylindrical part at a front end thereof that penetrates a hole provided in the operation panel and projects to the front of the operation panel, and into which the operation shaft of the switch part is inserted. A support member having a rear end portion attached to the printed circuit board, integrally connected to the support member, and holding means for holding the support member in contact with the back surface of the operation panel. A nut having a stepped portion that engages with the upper end of the cylindrical portion is fixed to the cylindrical portion protruding from the hole of the panel, and the holding means is abutted on the rear surface of the operation panel. Wherein mounted on the operation panel, the printed circuit board operation switch, wherein the switch unit is electrically connected through a respective detachable connector to the printed circuit board Te.