JPS5816093Y2 - helical rotary switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a helical rotary switch, and in particular, it facilitates the manufacturing and assembly work, and also enables miniaturization.
The inside of the switch can be sealed.

Before explaining the present invention, in order to clarify the gist of the present invention, a conventional device of this kind will be explained with reference to FIGS. 1 to 3.

Fig. 1 schematically shows a conventional helical rotary switch (hereinafter referred to as a switch), in which a rotating shaft 5 is coaxially inserted through the switch and fixed as a rotating shaft by its bearings 21, 21. It has disc-shaped insulating end plates 2 and 3, and this end plate 2
, 3 are supported by pillars 4, 4.

Reference numeral 1 indicates an insulating spiral plate whose outer edge is attached to the pillars 4, 4, coaxially with the shaft 5, and wound in a spiral shape. A plurality of terminal pieces 14 are provided, one end of which extends outward.

(Refer to Figures 2 and 3, 6 indicates a rectangular elongated member made of an insulating material, and in Figs. 2 and 3, a shaft 5 passes through this elongated member 6 and is fixed. A long electrically conductive plate 16 along the axial direction is attached to both opposing sides of this elongated member 60, and an insulating material is slidably passed through the elongated member 6 including this electrically conductive plate 16. A sliding member 1T consisting of the following is attached to the elongated member 6 (see FIG. 3).

This sliding member 1T has a conductive connection that integrally includes a connector, that is, a clamp 4 part 18 that clamps the plate 1 in a fork shape, and a sliding contact piece 19 that is slidable on the conductive plate 16. Part 20AA
r is installed.

In Fig. 1, 12 is an output terminal that is electrically connected to the conductive plate 16 and the connecting piece 20, etc., and connects 1 to the IA terminal, 10 is a wire, and 8 is coaxial with the shaft 5. It is an integrally attached operating knob.

The switch thus formed rotates the heir 8, thereby connecting the shaft 5, the elongated member 6'', the sliding member 17, and the clamping portion 1''.
8 is rotated as one body, and the clamping part 18 clamps and engages the plate 1 while being guided and rotated along its rotation, so that the connecting member 20A □ Therefore, the sliding contact piece 19 is forcibly moved in the axial direction while maintaining connection with the conductive plate 16.

That is, the connecting member 20A moves in two directions: the rotational direction of the shaft 5 and the axial direction.

Therefore, by rotating the eldest child 8 by a predetermined angle, the required terminal pieces 14 and the output terminals 12 are connected, and the original function of the switch is achieved.

This switch can also be conveniently used as a multi-contact changeover switch.

However, when using the above-mentioned conventional switch, the overall volume increases due to the presence of the plate 1 to be held and the supports 4, 4, which poses a problem in downsizing.

Furthermore, since the inside is open, dust may get into the connection parts, or moisture may enter, which is not desirable for electrical equipment.

The present invention aims to provide a device of this kind that can easily eliminate such drawbacks, be compact and sealed, and can be manufactured and assembled easily. An example will be described with reference to FIG. 4 and subsequent figures in which parts corresponding to those in FIGS.

In this paper, special structures are provided to the conventional spiral plate 1, its terminal piece 14, and the connecting member 20A in relation to each other in such a switch, which will be described in detail below.

The present invention has a cylindrical body 27, which is made of an insulating material and has both end faces, as shown in FIGS. , both end pieces 25, 26 and a plurality of 9 intermediate pieces 28 (28a,
28b...).

A terminal piece 14 is spirally attached to this cylindrical body 27.

Further, in detail, in this round cutting, both sides of the intermediate piece 28, that is, the cut surfaces are coaxial with the shaft 5 and have a spiral cut surface 29 of the same pinch, as shown in FIG. 5C. a
, 29 b, and another cut surface along the axial direction 3. Oa, 30b are formed in a row, and both end pieces 25, 26 also have spiral cut surfaces 29a,
29b and a cut surface 30a30b are formed on one side of each.

, thus the spiral cut surfaces 29 at 29b and the other cut surfaces 30a of adjacent intermediate pieces 28 correspond to each other.

, 30b, and both end pieces 25. are attached to both ends thereof.
26 in the same manner, the cylindrical body 2T is formed in a joined state.

An engagement groove 31 arranged spirally on the inner surface of the cylindrical body 21
are formed in succession.

Therefore, a groove 31 is formed in the inner circumferential surface of each piece 28, as shown by broken lines in FIG.

In FIG. 4, 32a and 32b (one not shown) are both end pieces 25 for bearings that are rotatably inserted through the shaft 5, respectively.
, 26 installation holes.

In FIGS. 6A and 6B, a terminal piece 1 is attached to each piece 28, and if necessary also to both end pieces 25 and 26, passing through it in the radial direction.
For example, a linear terminal piece 14 is attached to the fitting 33 through the inner hole 33a, and the inner end of the terminal piece 14 is bent into a U-shape to prevent its play. One end is engaged with an engagement recess 34 provided on the inner peripheral surface of the piece 28, and the other end is formed to protrude from the outer peripheral surface of the piece 28.

A required number of such fittings 33, ie, terminal pieces 14, are arranged in a spiral shape on the cylindrical body 2γ at the same pitch as the grooves 31.

On the other hand, an elongated member 6 is fixed to the shaft 5 by penetrating it, and conductive plates 16 are attached to both sides of the elongated member 60, as in the conventional example. In the figure, one end of the connecting member 20A has a bifurcated holding part 35 that clamps the elongated member 6 via the conductive plate 16 and electrically connects to the conductive plate, and the other end has the above-mentioned engaging part 35. A protrusion 36 is inserted into the matching groove 31 and guided when the shaft 5 rotates, and an elastic contact 3T is extended from the protrusion 36 to slide against the terminal piece 14. Each is provided.

Since the present invention is constructed as described above, first, the terminal piece 14 is attached to the intermediate piece 28 via the attachment member 33,
The conductive plate 1 is attached to both end pieces 25, 26 and the middle piece 28.
6 is attached by inserting the fixed shaft 5, and then fitting 30b to the other cut surface 30 and coaxially gluing the pieces together with an adhesive to form a cylindrical body. 2T, and the shaft 5 can be installed on the cylindrical body via a bearing 1.

At this time, the aperture member 20A, that is, the clamping part 35 clamps both groove electric plates 16, the protrusion 36 is inserted into the spiral engagement groove 31, and the connector 31 is rotated with the terminal piece 14. The connecting member 20A can be installed within the cylindrical body 2γ so as to electrically connect the terminal piece 14 and the conductive plate 16 in opposition to each other.

In this way, when the rotation shaft 5 is rotated, the connecting member 20A is rotated together with the rotation shaft 5 via the elongated member 6, and the protrusion 3 is rotated.
6 is guided and moved along the spiral groove 31. Therefore, the clamping portion 35 is forcibly moved in the axial direction while facing the conductive plate 16, and the connector 3T is attached to the terminal piece 14 during rotation. They can be electrically connected to each other, or they can be disconnected and connected to the next terminal piece 14.

Since the present invention is as described above, according to the present invention, the desired terminal piece 14 can be connected to the connecting member 20A- by rotating the shaft.
It can be electrically connected to, disconnected from, or disconnected from the output trochanter 12 via the conductive plate 16, and can function as a switch.

In addition, there is no need for a spiral plate or a pillar to support it as in the conventional example, so the volume can be made smaller, and most of the electrical contact parts are enclosed within the cylindrical body and are not exposed to the outside. Therefore, there is less chance of harmful electrical effects caused by the intrusion of dust or moisture, and furthermore, the cylindrical body can be assembled by simply stacking the pieces and gluing them together.
Since there are other cut surfaces 30a and 30b, there is an advantage that the cylindrical body can be easily assembled and the assembly work is further facilitated.

What is shown in FIG. 8 shows another embodiment of the present invention.
The same reference numerals are given to the parts corresponding to FIGS.

In this example, the engagement by the helical groove 31 of the previous example and the protrusion that is inserted therein and engaged is made into a different structure.

That is, a spiral protrusion 40 is provided on the inner circumferential surface of the cylindrical body 27, and a clamping portion 41 that elastically clamps and guides the connecting member 20A is provided.

The protrusion 40 and the terminal piece 14 (internal protrusion) are arranged in the same spiral spiral, and this example has the same effect as the previous example.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the equipment, Fig. 2 is a side view showing its main parts, and Fig. 3 is a sectional view taken along line AA.
Figure 4 is a partially omitted overall perspective view showing one embodiment of the present invention, Figure 5A is a side view of the single layer piece in Figure 4, Figure B
is a plan view thereof, Figure C is a side view of the intermediate piece, and Figure 6A is a side view of the intermediate piece.
is a cross-sectional view along line B-B in Figure 4, Figure B is an enlarged view of the main part thereof, Figure T A is a side view of the main part of Figure 6A,
8B is a plan view thereof, FIG. 8A is a side view of the main part showing another embodiment of the present invention, and FIG. 8B is a partially enlarged plan view thereof. □1 is an insulating spiral plate, 5 is a rotating shaft, 16 is a conductive plate, 18 is a connector, 19 is a sliding contact piece, 25, 26, and 28 are pieces 2
7 is a cylindrical body.

Claims (1)

[Scope of utility model registration request] The board on which a plurality of terminal pieces are attached is made into a coil of band-shaped insulator, and the conductive plate is placed on the insulator of the rotating shaft arranged on the axis of the coil. A sliding contact piece movable in a direction is provided, and a connector that makes sliding contact with the board is fixed to the sliding contact piece, and the connector is engaged with the surface of the board to selectively connect with the plurality of terminal pieces. In the helical rotary switch, the connector of the sliding contact piece is moved in a helical shape due to the rotation of the rotating shaft, and the terminal piece is electrically connected to the switch.
The terminal piece is attached to a cylindrical body formed by joining a plurality of pieces having helical cross sections in the axial direction, so that the terminal pieces are arranged in a helical shape. Helical rotary switch