JPH0145170B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric switch, and more particularly to an electric switch capable of turning off direct current power or changing the direction of current by a rotary step operation.

Conventional technology and problems Conventionally, devices that change the direction of current are wired mainly using doublebladed knife switches, which require the handle to be pulled by hand, so the height of the installation location is limited. is limited, and
Connection points are prone to wear due to friction caused by repeated operations, resulting in poor contact.

Incidentally, rotary type changeover switches are also commonly seen, but since the connection points are usually protruded from a rotating disk and slide into contact on a flat surface, they have the disadvantage that they cannot be used when the current is large.

Purpose of the Invention The present invention was proposed in view of the above-mentioned deficiencies, and an object of the present invention is to provide an electric switch that can be easily operated even if it is moved to a location that is out of reach. shall be.

It is also an object of the present invention to provide an electric switch that reduces phenomena such as poor contact due to wear.

It is also an object of the present invention to provide an electrical switch that can withstand larger currents.

Means for Solving the Problems The above-mentioned object of the present invention is to connect a first connecting portion and a second connecting portion each consisting of a pair of positive and negative fixed contacts on the DC power supply side and the load side, and and a rotation shaft portion consisting of a pair of movable contacts that can be rotated and slidably come into contact between the first connection portion and the second connection portion through the rotation,
The connecting part and the second connecting part are disposed on both ends of the rotating shaft in the axial direction with a center angle of 90 degrees between each other, and the contacts of each pole are fixed symmetrically across the axis. This can be achieved with the characteristic electric switch.

The present invention also provides that both ends of the movable contact of the rotating shaft portion along the axis direction are formed into convex curved surfaces with a center angle of 90°, and are fixed symmetrically across the axis. The fixed contact of each pole of the first connecting portion and the second connecting portion has a concave curved surface that slides into contact with the convex curved surface of the rotating shaft portion.

The present invention also provides that the rotating shaft portion is formed by a pair of mutually symmetrical movable contacts each formed with a convex curved surface along the axial direction, and fixed with the axis line in between, and the first connecting portion and The fixed contacts of each pole of the second connecting portion are all centered at a 90° center angle, and both ends have concave curved surfaces that slide into contact with the convex curved surface of the rotating shaft portion.

Embodiment FIG. 1 is an exploded view showing an embodiment of an electric switch according to the present invention. In the figure, the electric switch is composed of a first connection part 20, a second connection part 30, a rotation shaft part 40, and a rotation drive device 50.
A through-shaft hole 21 is bored in the center of the first connecting part 20, and two fitting grooves 22 are formed in the peripheral wall of the shaft hole 21 for fitting thin pieces 23 and 24 of the electric conductor. , 22 are provided facing each other across the axis,
The fitting grooves 22, 22 are provided with four openings 25, 25, 25, 25 which communicate with the shaft hole 21, respectively, at a center angle of 90 degrees with respect to the shaft center. Thin piece 23,
24 are curved into a shape that fits the fitting groove 22, and are urged to fit into the fitting groove 22 by their own elastic repulsive force, while their U-shaped opposite ends C, C', D,
D' is exposed through the openings 25, 25, 25, 25. The foils 23 and 24 are also connected to input conductors A' and B' of, for example, a motor, respectively.

A cylindrical recess 31 having the same diameter and a predetermined depth as the shaft hole 21 is provided in the center of the second connecting portion 30 .
A short cylindrical column 32 for stably rotating the 0 is provided upright. The thin piece 3 of the electrical conductor is also provided on the peripheral wall of the concave portion 31.
Two fitting grooves 33, 3 for fitting 4, 35
3 are provided facing each other, and four openings 36, 3 are provided which communicate with the recessed part 31 similarly to the first connecting part 20.
6, 36, 36 will be established. The thin pieces 34 and 35 also fit into the fitting grooves 33 and 33 due to their own elastic repulsive force.
, and both ends E, E′,
F and F' are exposed through the openings 36, 36, 36, 36. The thin pieces 34 and 35 are also connected to the positive and negative conductors of the power supply, respectively. - is connected to. In addition, the first connection part 20
and the second connecting portion 30 are the fitting grooves 22, 2.
2, 33, and 33 are connected at a 90° angle from each other. The rotating shaft portion 40 has a substantially cylindrical shape, and is loosely fitted into the shaft hole 21 of the first connecting portion 20, and
The rotating shaft portion 40, which is pivotally supported by the concave portion 31 of the second connecting portion 30, is inserted into the cylinder from the center by a radial plate.
The fitting grooves 43, 43 are partitioned into a semi-cylindrical space, and groove openings 44, 44 are formed in the center of each semi-cylindrical wall along the axial direction. The fitting grooves 43, 43 have fitting grooves 4, respectively.
Thin pieces 45 and 46 of electrical conductors curved according to the semi-cylindrical inner circumferential surfaces of Nos. 3 and 43 are fitted into the fitting grooves 43 and 43, and the arc-shaped central portions 451 and 43 are respectively fitted into the fitting grooves 43 and 43.
461 is further bent semicircularly toward the outer circumference to form the opening 4.
It is formed to protrude from 4,44.
In order to improve the elastic deformation of the thin pieces 45, 46, the central parts 451, 461 are divided into upper and lower parts so as to form four protruding connection parts G, G', H, and H', respectively. .

Further, a rectangular hole 41 is provided at the top axis of the rotation shaft portion 40 for rolling integrally with the rotation drive device 50 by fitting the prismatic protrusion 52 of the rotation drive device 50 thereinto. Moreover, an axial circular hole 42 is provided at the axial center position on the bottom surface for stably rotating the rotating shaft part 40 by fitting the short cylinder 32 of the second connecting part 30 therein. The rotation drive device 50 is configured to rotate the drive shaft 5 by pulling a string or chain 53 via a known ratchet mechanism (not shown) or the like.
1 can be rotated in steps, and the rotation shaft portion 40 can be rotated to a predetermined rotational position (here, every 45 degrees) by step rotation operation via the protrusion 52.

During operation, when the chain 53 is pulled and the rotation drive device 50 is rotated, the rotation shaft portion 40 is rotated together with the rotation drive device 50, and the electrically conductive thin pieces 45 and 46 are The electrical conductors of the first connecting portion 20 and the second connecting portion 30 can be connected and disconnected while slidingly contacting the inner circumferential surfaces of the connecting portion 20 and the second connecting portion 30.

FIG. 3 schematically shows the operating states of the electrical switch embodiment shown in FIG. In the figure,
The circles indicate each connection part G, G', H of the rotation shaft part 40,
H' is a sliding track, and motor input connection ends C, C', D, D' and power supply connection parts E, E', F, F' are arranged at 90° angle intervals above the outer circumference of this circular track. They are placed one above the other. In the state of (a), the protruding connection parts G, G' of the rotation shaft part 40 are connected to the C of the first connection part 20 and the E of the second connection part 30, respectively, and at the same time, the protrusion connection parts H, H' is connected to D of the first connection part 20 and F of the second connection part 30, respectively. That is, C (terminal A') of the first connection part 20 and E (power supply side positive terminal +) of the second connection part 30 are connected, and D (terminal B') of the first connection part 20 is connected. F (power supply side negative terminal -) of the second connection part 30 is now connected. Next, by pulling the chain 53, the rotation shaft portion 4
0 is rotated counterclockwise by 45 degrees to switch to the state shown in (b), the first connecting portion 20 is connected to the protruding connecting portions G, G' and H, H' of the rotating shaft portion 40. Since the connecting end is also separated, the connection with the second connecting part 30 is cut off. Furthermore, when the rotating shaft portion 40 is rotated 45 degrees counterclockwise to switch to the state shown in (c), terminal B' and the positive terminal + of the power supply are connected, and terminal A' and the power supply positive terminal + are connected. The negative terminal is connected. That is, in state (c), the circuit is connected in the opposite direction to that in state (a), and the direction of rotation of the motor is opposite to that in state (a). As the rotating shaft portion 40 continues to be rotated in 45° steps, the motor will alternately stop and reverse the direction of rotation one after another.

Effects of the Invention As explained above, the present invention operates the rotating step mechanism with a string or chain.
It can be easily operated even if it is moved out of reach, and by changing point contact to line contact, phenomena such as poor contact due to wear are reduced.
Furthermore, since the dimensions of each part in the axial direction can be stretched arbitrarily, the connection area can be expanded and a larger current can be withstood.

[Brief explanation of drawings]

FIG. 1 is an exploded view showing one embodiment of the electric switch according to the present invention, FIG. 2 is a three-dimensional external view of the embodiment shown in FIG. 1 in an assembled state, and FIG. 1 is a diagram schematically illustrating each operating state of the electrical switch embodiment shown in the figure; Description of symbols 20...First connection part, 21...Shaft hole, 22, 33, 43...Fitting groove, 25, 36,
44...Opening, 23, 24, 34, 35, 45,
46... Thin piece of electrical conductor, 30... Second connection part,
31... Concave portion, 32... Short cylinder, 40... Rotating shaft portion, 41... Rectangular hole, 42... Shaft circular hole, 50...
... Rotation drive device, 51 ... Drive shaft, 52 ... Protrusion, 53 ... Chain, 451, 461 ... Arc-shaped center part, A', B' ... Input conductor, G, G', H,
H'...Protruding connection part, C, C', D, D'...Motor input connection end, E, E', F, F'...Power supply connection part.

Claims (1)

[Scope of Claims] 1. The first and second connecting portions each consisting of a pair of positive and negative fixed contacts on the DC power supply side and the load side are rotatable in 45° steps, and the rotation thereof is and a rotating shaft portion consisting of a pair of movable contacts that can be slidably contacted between the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion are connected to each other. mutually on both ends of the rotating shaft in the axial direction.
An electric switch characterized in that the contacts of each pole are fixed symmetrically across the axis, and are arranged across a 90° central angle. 2. Both ends of the movable contact of the rotating shaft part along the respective axial center line directions are formed into convex curved surfaces with a center angle of 90°, and are fixed symmetrically across the axis, and the first connecting part 2. The electric switch according to claim 1, wherein the fixed contact of each pole of the and second connecting portion has a concave curved surface that slides into contact with a convex curved surface of the rotating shaft portion. 3. The rotation shaft portion includes a pair of mutually symmetrical,
Movable contacts each formed into a convex curved surface along the axial direction are fixed across the axis, and the fixed contacts of each pole of the first connection part and the second connection part are both 90 degrees from the center. 2. The electric switch according to claim 1, wherein both end portions are formed as concave curved surfaces that slide into contact with the convex curved surface of the rotating shaft portion at opposite angles.