JPS638039Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small rotating electric component such as a rotary slide switch, and more specifically, the present invention relates to a small rotating electric component such as a rotary slide switch, and more specifically, it is designed to have a simple structure, good internal airtightness, and easy disassembly. This invention relates to rotary electrical components.

The configuration and the like will be explained in detail below with reference to the drawings.

Fig. 1 is a vertical sectional view showing an embodiment of the present invention in a rotary type changeover switch, and Fig.
It is a sectional view taken along the - line in the figure. In these figures, the symbol 1 is a rotor, and this rotor 1
is integrally equipped with a rotating shaft 2, and holes 5 and 6 coaxially drilled in a pair of upper and lower printed boards 3 and 4 are provided on both sides a and b perpendicular to the axis of the rotating shaft 2. Boss portions 1A and 1B that are pivotally supported are integrally provided in a protruding manner.

Reference numeral 7 denotes a ring-shaped surrounding ring (ring-shaped body) that surrounds the rotor 1;
It is inserted between the pair of printed boards 3 and 4, and is integrally fixed to the printed boards 3 and 4 with a plurality of bolts 8 and nuts 9. On one side of the rotor 1, there are two movable contacts 10a, 10 with several legs facing toward the opposing printed board 4.
b is attached, and its tip is connected to the printed board 4.
A plurality of fixed contacts 11a, 1 laid out in
1b... is brought into contact with it. the fixed contact 11a,
11b... are electrically connected to terminals 13a, 13b... via electric circuits 12a, 12b... wired on the printed board 4 by printing or labeling.

The internal space 14 surrounded by the printed boards 3, 4 and the surrounding ring 7 is kept airtight by a grease-like non-hardening insulating agent 15 and a pair of upper and lower O-rings 16. The non-hardening insulating material 15 is applied to the contact surfaces between the surrounding ring 7 and the printed boards 3 and 4. On the other hand, the pair of O-rings 16 are fitted into annular grooves 17 provided on each side surface a, b of the rotor 1 and come into contact with the printed boards 3, 4, thereby making contact with the printed boards 3, 4. It closes the gap between it and the rotor 1.

In this case, the diameter D ₁ of the boss portions 1A and 1B is smaller than the diameter D ₂ of the hole 6 (D ₂ >D _{1 ), and the diameter of the O-ring 16 is smaller than the diameter D 2 of the hole 6 (D 2 >D 1} ).
D ₃ is set larger than the diameter D ₂ of the hole 6 (D ₃ >D ₂ ). Further, the width W ₁ of the surrounding ring 7, in other words, the distance between the upper and lower printed circuit boards 3 and 4 is larger than the width W ₂ between the both sides a and b of the rotor 1 (W ₁ >
W ₂ ) and smaller (W ₃ >W ₁ ) than the interval (W ₃ ) of the pair of upper and lower O-rings 16 in their natural state. Therefore, a pair of printed boards 3,
4 to the surrounding ring 7, each O-ring 16 is compressed by the printed circuit board 3,4.

Typical materials for the above-mentioned constituent members include Bakelite for the printed boards 3 and 4, plastic material for the surrounding ring 7 that does not allow electrical circuits 12a, 12b, etc., and rotor 1 for each of the movable contacts 10a, 10b.
It is preferable to use a plastic material that does not cause short circuits.

According to the rotary changeover switch having such a configuration, the positions of the movable contacts 10a, 10b change by rotating the rotation shaft 2, so that the fixed contacts 11a, 11b can be electrically opened and closed. I can do it. In addition, since the rotor 1, printed boards 3, 4, and surrounding ring 7, which are the minimum required for a changeover switch, are effectively used, the use of new parts can be minimized, and the internal space 14 is airtight. can be maintained. In particular, the distance between the two O-rings 16 should be adjusted to the width of both printed boards 3, 4, in other words, the width of the surrounding ring 7.
By making _W1 larger than W1, the elastic force of the printed boards 3 and 4 clamps the O-ring 16, and this elastic force acts as a force to suppress the axis deviation of the rotor 1, thereby enabling stable contact operation. Further, since the rotor 1 is elastically supported by the printed circuit boards 3 and 4 via the O-ring 16, the O-ring 1
The frictional force received from 6 will not become excessive. That is, due to the deflection of the printed circuit boards 3 and 4, O
The pressure contact force on the ring 16 changes appropriately, and the rotor 1
enables smooth rotation. Moreover, even if the thickness of the O-ring 16 decreases due to wear etc., the printed circuit boards 3 and ₄ will not be able to maintain the specified pressing force until the distance between the two O-rings in their natural state becomes equal to the width W1 of the surrounding ring 7. Since the O-ring 16 is continued to be pressed, the gap between the printed boards 3, 4 and the rotor 1 can be reliably closed.

In the above embodiment, the movable contacts 10a and 10b are provided on one side of the rotor 1, but the movable contacts 10a and 10b may of course be provided on both sides, and the number of movable contacts is not limited to two, but at least two. One piece is enough.

Furthermore, although the above embodiment has been explained using an example of a rotary switch, electrical components such as a rotary resistor (rotary trimmer) in which a resistance wire is printed on a printed board along the locus of a movable contact may also be used. Of course, it can also be applied to

As explained above, according to the rotary electric component according to the present invention, the rotor is rotatably disposed between two printed boards on which fixed contacts are printed, and an insulating ring-shaped body surrounding the rotor is provided. O-rings were installed on both sides of the rotor to seal the gaps between the rotor and each printed board, and an insulating non-hardening agent was applied to the contact surface between the printed board and the ring-shaped body, so the internal space was Airtightness can be increased. In particular, the distance between the two O-rings provided on both sides of the rotor is made larger than the distance between the two printed circuit boards, and these O-rings are pressed and clamped by the printed boards, which prevents rotor axis misalignment. In addition to being able to prevent this and obtain stable contact operation, it is also possible to reliably maintain airtightness between the printed board and the rotor. Therefore, it is possible to prevent poor contact between the fixed contact and the movable contact due to dust, etc., improve durability, and the structure is extremely simple, making assembly and disassembly easy. It's large.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention in a rotary type changeover switch, and Fig.
It is a sectional view taken along the - line in the figure. 1...Rotor, 1A, 1B...Boss part, 3, 4
...Printed board, 5, 6...hole, 7...surrounding ring (ring-shaped body), 10a, 10b...movable contact, 1
1a, 11b...Fixed contacts, 12a, 12b...
Electric circuit, 13a, 13b... terminal, 14... internal space, 15... insulating non-hardening agent, 16... O-ring, 17... annular groove.

Claims (1)

[Scope of utility model registration request] An insulating rotor equipped with a movable contact, and two printed boards that support the rotor, are provided with a fixed contact that corresponds to the movable contact, and have an electric circuit printed or attached thereon connected to the fixed contact. and an insulating ring-shaped body that surrounds the rotor and is inserted between the printed boards, and each of the printed circuit boards is provided on both sides perpendicular to the axial direction of the rotor. Boss parts that are supported by holes in the board are integrally provided around the rotation axis, and O-rings that are brought into close contact with each printed board and tightly seal the holes are respectively fitted. The diameter of the O-ring is set to be smaller than the diameter of the hole, and the diameter of the O-ring is set larger than the diameter of the hole, and the distance between the two printed circuit boards is larger than the width between both sides of the rotor, and By setting the spacing smaller than the natural distance between the O-rings fitted on the surface, these O-rings are elastically compressed, and the contact surface between the ring-shaped body and each printed board is A rotating electrical component characterized by being sealed by applying an insulating non-hardening agent.