JPS587952Y2 - rotary switch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotary switch that is easy to assemble and reduces the number of man-hours.

Next, this invention will be explained in detail with reference to FIGS. 1 to 5 showing one embodiment thereof.

In the drawing, 1 is a housing for electronic equipment, etc., 2, 3.4 are holes made through the housing 1, 2 is a square hole for operation, 3 is a hole for display, and 4 is a hole for transparent viewing. The square hole 5 is a rotating knob of a rotary switch that is partially exposed in the square hole 2. A recess 6 is formed in the upper part, and a display number (not shown) is provided on the peripheral edge of the upper surface corresponding to the square hole 4. is written.

7 is a rotating shaft of the rotating knob 5; 8 and 9 are two non-circular parts of different sizes formed on the rotating shaft 7 and cut out on both sides; 10
．． 11 is a through hole leading from the recess 6 to one side of each of the non-circular parts 8 and 9; 12.13 is a stepped portion formed on the rotating shaft 7 at the end of both feed holes 10.11; 14 is the rotating shaft 7. 15 is a recess 6 of the rotary knob 5.
The lead wires 16 and 17 are inserted into the through holes 10 and 17, respectively.
Light emitting diodes for display inserted into 11, 18, 19
20 and 21 are two pieces formed in a trapezoid shape and a switch piece, and 20 and 21 are fittings provided transparently in the center of each of the switch pieces 18 and 19 so as to fit into the respective non-circular parts 8 and 9 of the rotary knob 5. Holes 22 and 23 are cut and raised holes formed in the fitting holes 20 and 21, respectively, 24 and 25 are movable contacts provided at the bottom of both ends of the switch pieces 18 and 19, and 26 is fixed to the housing 1. A printed circuit board, 27 is a mounting hole for the rotary knob 5 provided transparently in the board 26, 28 and 29 are one and the other fixed contacts formed of foil on the board 26, and each switch piece 18 and 19 are rotated. Each movable contact 24
It is provided on a locus of 25°, and one fixed contact 28 and the other fixed contact 29 are respectively provided in seven opposite positions,
One of the fixed contacts 28 is connected to each other.

Reference numeral 30 designates a locking tool which is inserted into the mounting hole 27 of the base plate 26 and fitted into the cut groove 14 of the rotary shaft 7 of the rotary knob 5 to prevent the rotary shaft 7 from being removed.

Next, the assembly and operation of the above embodiment will be explained with reference to FIG.

First, when assembling the rotary switch, the light emitting diode 15 is inserted into the recess 6 of the rotary knob 5, and both lead wires 16 and 17 of the light emitting diode 6 are inserted into the through holes 10 and 11, respectively.

At this time, the ends of both lead wires 16 and 17 of the light emitting diode 15 are connected to the step portions 12 of the respective through holes 10 and 11.
, 13, and the lower limit positions of both lead wires 16 and 17 are regulated.

Next, the rotating shaft 7 is inserted through the fitting holes 20, 21 of the two switch pieces 18, 19, and both switch pieces 18, 19 are fitted into the non-circular parts 8, 9, respectively. 18.19 respective incisions 22 and 23
are pressed into contact with the non-circular parts 8 and 9 via the lead wires 16 and 17 of the light-emitting diode 15, and both switch pieces 18 and 19 are fixed to the non-circular parts 8 and 9, and the light-emitting diode 15
Both lead wires 16.17 are connected to the cut and raised portions 22.23 of both switch pieces 18.19 and the respective non-circular portions 8.9.
It is clamped and fixed between.

Furthermore, the rotary knob 5 is inserted into the mounting hole 27 of the printed circuit board 26.
The rotating shaft 7 is inserted through the cut groove 14 of the rotating shaft 7.
engage the locking tool 30 with the
6, and the assembly of the rotary switch is completed.

That is, the rotary knob 5 of the two switch pieces 18 and 19
The light emitting diode 15 is fixed at the same time as the light emitting diode 15 is fixed to the light emitting diode 15 and both switch pieces 18.
19 are electrically connected by pressure contact, and the light emitting diode 15
Connections can be made without the need for soldering, which greatly simplifies assembly work.

When this rotary switch is attached to a device, a part of the rotary knob 5 is exposed in the square hole 2, the light emitting diode 15 is placed in the circular hole 3, and the display on the top of the rotary knob 5 is placed in the square hole 4. The printed circuit board 26 is fixed to the casing 1 so as to face each other.

In the above embodiment, since the distance between the rotary knob 5 and the housing 1 is small, the recess 6 for inserting the light emitting diode is provided in the rotary knob 5. However, when the distance between the rotary knob 5 and the housing 1 is large, Alternatively, the light emitting diode 15 may be attached to the upper surface of the rotary knob 5.

Therefore, when the rotary knob 5 is rotated, both switch pieces 18, 19 rotate together with the rotary knob 5, and both rotary contacts 24, 25 move in a circular trajectory while slidingly contacting the printed circuit board 26. As shown in FIG. 5, one movable contact 25 is always electrically connected to one fixed contact 28,
When the other movable contact 24 is joined to the other fixed contact 29a, one fixed contact 28, one movable contact 25.
Switch piece 199 light emitting diode 15. Switch piece 18
．． Passing through the other movable contact 24, the other fixed contact 29 a
When a current flows through, the light emitting diode 15 emits light to indicate the connection of the switch, and a predetermined switch number written on the top surface of the rotary knob 5 is located below the square hole 4, indicating the connection position of the switch. .

Then, by rotating the rotary knob 5, the other movable contact 24 is sequentially joined to the other fixed contacts 29b to 29g, so that one fixed contact 28 connects to the other fixed contact 29.
b to 29g are sequentially switched and connected via the light emitting diode 15.

As mentioned above, according to the rotary switch of this invention,
Two non-circular parts of different sizes are formed on the rotation shaft of the rotary knob, a through hole is formed in the rotary knob that communicates with one side of each of the non-circular parts, and both feed holes are provided with markings. Insert both lead wires of a light-emitting diode, and fit two switch pieces, each with a movable contact and a cut edge, into both non-circular parts, and insert both lead wires into both switch pieces. By sandwiching each switch piece between each cut and raised part and each non-circular part, each switch piece is fixed to the rotating shaft of the rotary knob, and at the same time both lead wires of the light emitting diode are held between each of both switch pieces. The light-emitting diode can be clamped and fixed between the cut-and-raised part and the rotating shaft, and the light-emitting diode can be fixed without the need for complicated work such as soldering, and it can be electrically connected to both switch pieces. This invention provides an inexpensive rotary switch that significantly improves workability and reduces man-hours.

[Brief explanation of drawings]

The drawing shows one embodiment of the rotary switch of this invention,
Figure 1 is a perspective view when applied to electronic equipment, Figure 2 is a partially cutaway side view of Figure 1, Figure 3 is a sectional view taken along line A-A' in Figure 2, and Figure 4 is an exploded perspective view. Figure 5 is a wiring diagram. 5...Rotary knob, 6...Recess, 7.
...Rotation axis, 8゜9...Non-circular part, 10
．． 11... Through hole, 15... Light emitting diode, 16.17... Light emitting diode lead wire, 18° 19... Switch piece, 20, 21・
...Fitting hole, 22, 23...cut and raised,
24.25... Movable contact, 26... Board, 28.29... Fixed contact.

Claims (1)

[Scope of utility model registration request] Two non-circular parts of different sizes are formed on the rotation axis of the rotary knob, a through hole communicating with one side of each of the two non-circular parts is formed in the rotary knob, and in both the feeding holes, Insert both lead wires of the display light emitting diode, respectively, and fit two switch pieces each having a movable contact and a cut edge at the end into the non-circular portion, and insert both lead wires into the non-circular portion. A rotary switch which is sandwiched between each cut and raised part of both switch pieces and each of the non-circular parts.