JPS587953Y2 - rotary switch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary switch in which the attachment of the rotor of the rotary switch to the substrate is improved.

A conventional rotary switch is shown in FIGS. 1 and 2.

In the rotary switch shown in FIG. 1, the rotor 1 is attached to the board 2 as follows.

That is, the fitting part 3 of the rotor 1 is inserted into the hole 4 of the board 2, and a retaining ring 6 whose outer diameter is larger than the diameter of the hole 4 is attached to the stepped part 5 of the fitting part 3 that protrudes from the back side of the board 2. The rotor 1 is rotatably attached to the substrate 2 by fitting.

A switch driving shaft 7 is inserted into a square hole 8 provided in the center of the rotor 1.

A contact intervening conductor integrally equipped with two contact pieces 9 having spring properties is fixed on the surface of the rotor 1 facing the substrate 2. It is adapted to slide on a plurality of conductors 10 provided in a predetermined arrangement on a circumference concentric with the hole 4.

Each conductor 10 is connected to a plurality of terminals 1 provided on the substrate 2.
1 and conductive to each other.

When the shaft 7 of the rotary switch configured as described above is rotated by a predetermined angle, the rotor 1 stops at a position where each contact piece 9 contacts a predetermined conductor 10, and the contact between the two terminals 11 that are electrically connected to the conductor 10 is stopped. The circuit is closed.

By adjusting the rotation angle of this shaft 7, circuit switching is possible.

Furthermore, in the rotary switch shown in FIG. 2, the rotor 21 is
Insert the fitting part 22 of the rotor 21 into the hole 24 of the board 23, put the stop plate 25 on the end surface of the fitting part 22 protruding from the back side of the board 23, and connect the stop plate 25 and the rotor 21 with the screw 26. They are rotatably attached to the substrate 23 in collinear alignment.

The shaft 27 for driving the switch is inserted into the square hole 28 of this rotor 21. It is inserted into the square hole 29 of the stop plate 25.

In this case as well, by rotating the shaft 27 by a predetermined angle, a circuit between the terminals 32 corresponding to the two conductors 31 in contact with the two contact pieces 30 of the intervening conductor provided on the rotor 21 is closed.

The conventional rotary switch having such a configuration 9 has a drawback that the rotor falls off from the board due to deformation of the retaining ring 6 or loosening of the screw 26.

The present invention is intended to solve these problems, and aims to provide a rotary switch in which the rotor does not fall off the board.

Next, an embodiment of the present invention will be described with reference to FIG.

In the figure, 41 is a rotor, 42 is a substrate, 43 is a shaft for driving a switch, and 44 is a stop plate.

The fitting portion 45 of the rotor 41 has a groove 46 for fitting the stop plate 44.
The rotor 41 and the stop plate 44 are provided with a square hole 47 and a square hole 48, respectively, through which the shaft 43 is inserted.

Further, the substrate 42 is provided with a hole 49 into which the fitting portion 45 fits, a plurality of conductors 50, and a plurality of terminals 51 that are electrically connected to each of the conductors 50, respectively.

The rotor 41 inserts the fitting part 45 into the hole 49 and inserts the fitting part 45 into the hole 49.
By fitting the stop plate 44 into the groove 46 provided in the part protruding from the back side of the substrate 42 of No. 5, and inserting the shaft 43 through the square hole 47 of the rotor 41 and the square hole 48 of the stop plate 44, mounted on.

In this case, the rotor 41 is vertically locked to the substrate 42 by the stop plate 44, and the stop plate 44 is
It is locked by the shaft 43 that fits into the groove 46 and cannot be pulled out from the groove 46.

Therefore, it is possible to reliably attach the rotor 41 to the substrate 42 and prevent it from falling off.

This rotary switch is operated by rotating the shaft 43 as in the conventional case.

In the above explanation, we have described an example in which a circuit is formed by connecting two conductors, but in addition to the above-mentioned conductors, a ring-shaped common conductor is provided on the board, and this common conductor is connected to a terminal. Two contact pieces of the contact intervening conductor may be brought into contact with a common conductor and one conductor to form a circuit.

As described above, according to the present invention, the rotor is vertically locked by the stop plate, and since this stop plate is locked to the shaft and cannot be pulled out, can prevent the material from falling off.

[Brief explanation of the drawing]

1 and 2 are exploded perspective views of a conventional rotary switch, and FIG. 3 is an exploded perspective view showing an embodiment of the rotary switch according to the present invention. In the figure, 41 is a rotor, 42 is a substrate, 43 is a shaft, 4
4 is a stop plate, 45 is a fitting part, 46 is a groove, 47, 48 is a square hole, 49 is a hole, 50 is a conductor, and 51 is a terminal.

Claims (1)

[Scope of utility model registration request] A rotary switch in which a fitting portion of a rotor is rotatably fitted to a substrate and the rotor is rotated by a shaft to perform circuit switching between a contact intervening conductor provided on the rotor and the substrate. A groove is provided in a protruding portion of the mating portion from the back side of the substrate, a stop plate for vertically locking the rotor with respect to the substrate is fitted into the groove, and the shaft is inserted through the rotor and the stop plate. A rotary switch characterized in that the rotor is attached to the substrate by attaching the rotor to the substrate.