JP2724578B2 - Rotary switch - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a rotary switch.

<Prior art and problems> Conventionally, as this kind of switch, there is one disclosed in Japanese Utility Model Laid-Open No. 35338/1986. As shown in FIG. 11, a plurality of contact pieces 104 that are opened and closed by a rotor 103 are provided on a terminal base 102 on which a case 101 is fitted as shown in FIG. 11, and a knob 105 mounted on an upper portion of the case 101 is provided. By operating and rotating the rotor 103, the open / close state of each contact piece 104 can be sequentially switched.

By the way, in this type of switch, it is desired to use a type in which the rotor 103 can be rotated from a direction along the surface of the printed wiring board 108 mounted via the external terminal pieces 106 and 107 protruding from the terminal base 102, that is, a so-called vertical type. There are many requests. Conventionally, in order to meet this demand, the external terminal pieces 106 and 107 are bent at right angles as shown in FIG. However, in this case, there is a trouble that the external terminal pieces 106 and 107 are bent after assembling the switches, and the external dimensions L are large and a mounting space is large. Even if it is attempted to insert-mold the external terminal pieces 106 and 107 that have been bent from the beginning into the terminal base 102, it is difficult to realize this because the molding die becomes complicated.

<Object of the Invention> The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and has as its object to provide a vertical type rotary switch capable of reducing the outer dimensions.

<Structure and Effect of the Invention> A rotary switch according to the present invention includes first and second terminal bases formed by joining opposing surfaces to each other, and the first and second terminal bases.
And a rotor having a cam surface formed around a rotation axis. The first terminal base has a common fixed terminal piece, and a common fixed terminal piece is electrically connected to the common fixed terminal piece. A plurality of fixed contact pieces protruding from a plurality of movable contact pieces fixedly connected and fixed, and a plurality of fixed terminal pieces to be brought into contact with and separated from the movable contact pieces; A predetermined fixed terminal piece protruding from the terminal base is integrally connected at an intermediate portion thereof, and the fixed terminal piece connected by the second terminal base is bent between the first and second terminal bases. The fixed terminal pieces of each terminal base are arranged in a two-column tandem configuration, and the movable contact piece is brought into contact with and separated from the corresponding fixed terminal piece by movement of a cam surface accompanying rotation of the rotor. It is composed.

According to the present invention, the second terminal base, in which the predetermined fixed terminal pieces protruding from the first terminal base are joined at the intermediate portion, is fixed between the first terminal base and the second terminal base. Since the terminal strips were bent and joined to the first terminal base, and each fixed terminal strip from both terminal bases was formed as a two-row tandem,
A vertical type that can operate the rotor from the direction along the surface of the printed wiring board can be easily obtained, and the outer shape is smaller than that in which fixed terminal pieces protruding from both terminal bases are bent at right angles. Can be reduced in size.

<Description of Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

1a, 1b and 1c are a front view, a side view and a rear view, respectively, showing an example of a rotary switch according to the present invention.

In FIG. 1, reference numeral 1 denotes a first terminal base, 2 denotes a second terminal base, and both 1 and 2 are formed by joining opposing surfaces to each other. The switch case 4 is constituted by the cover 3 to be fitted. The rotor 5 shown in FIG. 2 is disposed on the first terminal base 1 and its rotating shaft 6 is connected to a shaft hole 7 of the terminal base 1.
It is set to be rotatable by being fitted into. The rotor 5 has a knob 5a exposed from an opening 3a formed in the front wall of the cover 3 as shown in FIGS. 4a, 4b and 4c, and is formed around a rotation shaft 6 on the rear side. An operating groove 8 is formed on the front surface of the knob 5a. Knob 5a
As shown in FIG. 2, an O-ring 9 is interposed between the outer peripheral surface of the above-mentioned and the inner peripheral surface of the opening 3a.

As shown in FIG. 3, the first terminal base 1 has a first common fixed terminal piece 10 and first and second fixed terminal pieces 1.
1 and 12 are arranged in a row, and the inner ends 10a, 11a and 12a are fixed by insert molding, and a second common fixed terminal piece coupled to the first common fixed terminal piece 10. 13 inner end 13
a and each inner end 14a of the third and fourth fixed terminal pieces 14, 15;
15a (FIG. 5) is fixed. Furthermore, this first
As shown in FIGS. 2 and 3, the base end 16a has a base end 16a at the inner ends 10a, 13 of the common fixed terminal pieces 10, 13.
A common contact piece 16 which is crimped to a by a crimping projection 17 (17A, 17B) and electrically connected thereto is provided. The common contact piece 16 includes a plurality of movable contact pieces 18 (18A, 18B, 18C,
18D) are protruded, and the movable contact pieces 18A, 18B, 18C, 18D respectively correspond to the inner ends 11a, 12 of the fixed terminal pieces 11, 12, 14, 15.
The a, 14a, and 15a are set so as to come into contact with and separate from each other by the movement of the cam surface 5b accompanying the rotation operation of the rotor 5.

The second terminal base 2 includes a second common fixed terminal piece 13 protruding from the first terminal base 1 and third and fourth fixed terminal pieces 13.
The fixed terminal pieces 14 and 15 are fixed by insert molding so as to be integrally connected at an intermediate portion thereof. The fixed terminal pieces 13, 14, 15 connected by the second terminal base 2 are:
The outer ends 10b of the first common terminal piece 10, the first and second fixed terminal pieces 11, 12 which are bent between the two terminal bases 1 and 2 and protrude from the first terminal base 1. , 11b, 12b, and a second common terminal strip 13, which protrudes from the second terminal base 2,
The outer end portions 13b, 14b, 1 of the third and fourth fixed terminal pieces 14, 15
5b is a printed circuit board 19
It is configured as an external terminal piece connected to the like. Second
In the figure, 20A and 20B are formed on the second terminal base 2 and
Are convex portions fitted into the concave portions 21A and 21B on the terminal base 1 side.

 The procedure for manufacturing the rotary switch is as follows.

A lead frame 50 shown in FIGS. 5 and 6 is molded from a conductive plate (not shown) by press working or the like. That is,
The lead frame 50 includes common fixed terminal pieces 10, 13,
The second, third and fourth fixed terminal pieces 11, 12, 14, 15 are connected to the frame piece 51 via connecting pieces 52A, 52B.

The lead frame 50 is set in a molding die (not shown), and the inner ends 10a, 13a of the common fixed terminal pieces 10, 13 are connected to the
The first, second, third and fourth fixed terminal strips 11, 12, 14, 15 are molded with an insulating synthetic resin in the vicinity thereof so that the respective inner ends 11a, 12a, 14a, 15a are exposed. As shown in FIG. 7, the first terminal base 1 is formed. Furthermore, the common fixed terminal piece
13, The third and fourth fixed terminal pieces 14, 15 are similarly molded with an insulating synthetic resin to form the second terminal base 2.

Thereafter, an undesired portion of the lead frame 50 is cut and removed to obtain a block 53 as shown in FIGS. 8 and 9.
Next, the first terminal base 1 and the second terminal base 1
And the central portion 54 of the common fixed terminal strip 13, the third and fourth fixed terminal strips 14 and 15 are bent around the first terminal as shown in FIG. The second terminal base 2 is joined to the lower surface of the base 1. These terminal bases 1 and 2 are bound with a resin coating 55 and cover the bent portion 54 and the like.

Attach the common contact piece 16 to the first terminal base 1,
If the rotor 5 is incorporated and the cover 3 is attached, a rotary switch is assembled.

In the above configuration, the operation groove 8 of the knob 5a of the rotor 5
When the rotor 5 is rotated by inserting a driver (not shown) or the like into the movable contact piece 18, the movable contact piece 18
Of the A, 18B, 18C, and 18D, the one pressed by the cam surface 5b of the rotor 5 comes into contact with the corresponding one of the fixed terminal pieces 11, 12, 14, and 15, and a switch output is obtained. Become. By the rotation operation of the rotor 5, the contact / separation state between the movable contact pieces 18A, 18B, 18C, 18D and the fixed terminal pieces 11, 12, 14, 15 is switched.

Here, a first terminal base holding the respective inner ends 10a, 13a of the common fixed terminal pieces 10, 13 and the respective inner ends 11a, 12a, 14a, 15a of the fixed terminal pieces 11, 12, 14, 15. 1 and a second terminal base 2 in which a common fixed terminal piece 13 and fixed terminal pieces 14, 15 protruding from the terminal base 1 are integrally connected at an intermediate portion, and fixed terminal pieces 13, 14, 15 Of the fixed terminal pieces 10, 11, 12 and the other set of the fixed terminal pieces 13, 14, 15 are orthogonal to the rotating shaft 6 of the rotor 5. Direction 2
The rotor 5 is pulled out in column and puts the rotor 5 on the printed wiring board 19.
A vertical type that can be operated from a direction along the surface of is obtained. In addition, the outer ends 10b, 11b, 1 of the fixed terminal pieces 10, 11, 12, 13, 14, 15 protruding from the terminal bases 1, 2.
There is no need for a bending space of 2b, 13b, 14b, 15b, and the overall outer dimension L is reduced, so that space for mounting can be saved. Since the second terminal base 2 merely has the fixed terminal pieces 13, 14, and 15 inserted for insulation, making the second terminal base 2 thinner makes it easier to reduce the overall thickness.

[Brief description of the drawings]

FIGS. 1a, 1b and 1c are front, side and rear views, respectively, showing an example of a rotary switch according to the present invention, FIG. 2 is a cross-sectional view of the rotary switch, and FIG. Front view of the rotary switch on the terminal base side, FIGS. 4a and 4b
Fig. 4 and Fig. 4c are a front view, a partially cutaway side view and a rear view, respectively, showing the structure of the rotor of the same rotary type switch.
FIG. 6 is a plan view showing a lead frame of a fixed terminal piece of the rotary switch, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a first terminal base and a second terminal on the lead frame. FIG. 8 is a plan view showing a state in which the base is formed, FIG. 8 is a plan view showing an undesired portion of the lead frame shown in FIG. 7, and FIG. 9 is a sectional view of FIG. 11 and 12 are partially cutaway side views showing different conventional rotary switches. FIG. 1... First terminal base, 2... Second terminal base, 5
…… Rotor, 5b …… Cam surface, 6… Rotary axis, 10,13 ……
Common fixed terminal strips, 11, 12, 14, 15 ... fixed terminal strips, 16 ...
… Common contact piece, 18A, 18B, 18C, 18D …… Movable contact piece, 54…
… Bend.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-60-115421 (JP, A) JP-A-6-129934 (JP, U) JP-A-61-127535 (JP, U) JP-A-61-127535 35338 (JP, U)

Claims (1)

(57) [Claims] A first terminal base formed by joining opposing surfaces to each other; a first terminal base rotatably mounted on the first terminal base, and a cam surface formed around a rotation axis. The first terminal base includes a common fixed terminal piece, and a common contact piece formed by projecting a plurality of movable contact pieces electrically connected and fixed to the common fixed terminal piece. A plurality of fixed terminal pieces to be brought into contact with and separated from the movable contact piece, and the second terminal base integrally connects predetermined fixed terminal pieces protruding from the first terminal base at an intermediate portion thereof. The fixed terminal piece connected by the second terminal base is the first terminal piece.
And the second terminal base is bent so that the fixed terminal pieces of each terminal base are arranged in two-row tandem, and the movable contact piece corresponds to the movement of the cam surface due to the rotation operation of the rotor. A rotary switch configured to be brought into contact with and separated from a fixed terminal piece.