JP5649985B2 - Switch - Google Patents

Description

  The present invention relates to a switch using a roller contact as a movable contact, and more particularly to a switch suitable for use as an auxiliary switch of a tap switching device.

  A switch using a roller contact as a movable contact is known. For example, in a load tap changer, a roller contact is used as a movable contact as an auxiliary switch provided in a changeover switch that switches between an odd-numbered tap selection state and an even-numbered tap selection state. Switch may be used.

  The switching switch provided in the on-load tap switching device is configured, for example, as shown in FIG. , Wt is a tap winding of a transformer having taps t1, t2, t3,..., TC1 and TC2 are odd tap selectors for selecting odd taps t1, t3,... And even taps t2, t4,. And an even tap selector. SW is an auxiliary switch comprising fixed contacts S1 and S2 connected to the tap selectors TC1 and TC2, respectively, and a movable contact S0 that selectively contacts the fixed contacts S1 and S2. V1 is a movable contact of the auxiliary switch. A first vacuum valve having one end connected to S0 and the other end connected to the neutral point terminal N, R is a current limiting resistor having one end connected to the tap selector TC1, and V2 is a current limiting resistor R This is a second vacuum valve connected between the other end and the neutral point terminal N, and is switched by the auxiliary switch SW, the current limiting resistor R, and the first and second vacuum valves V1 and V2. A switch is configured. In this type of switching switch, a switch in which the movable contact S0 is configured by a roller contact may be used as the auxiliary switch SW.

  Note that the switching switch shown in FIG. 6 operates as follows. In the state shown in FIG. 6, the movable contact S0 of the auxiliary switch SW is switched to the fixed contact S1 side (odd tap side), the first vacuum valve V1 is turned on, and the odd tap (example shown in the figure). Then, the tap t1) is selected. When switching from this state to the state of selecting the even-numbered tap t2, first, the second vacuum valve V2 is turned on, the first vacuum valve V1 is turned off, and the current flowing through the tap t1 is limited by the current limiting resistor. Switch to the state of flowing through R. Next, after the movable contact S0 of the auxiliary switch SW is switched to the fixed contact S2 side (even tap side), the first vacuum valve V1 is turned on, and the tap t1-tap t2-fixed contact S2-movable contact S0- The closed circuit of the first vacuum valve V1-second vacuum valve V2-current limiting resistor R-tap t1 is brought into a state where a circulating current flows. Thereafter, the second vacuum valve V2 is turned off to switch to a state in which the main circuit current flows through the even-numbered tap t2. Since this type of switching switch is well known, further detailed description is omitted.

  A switch using a roller contact as a movable contact is configured, for example, as shown in FIG. In FIG. 5, reference numeral 1 denotes a rotary operation shaft that is rotatably supported and is operated so as to rotate in one direction and the other direction, and 2 has an electrode surface 2 a oriented in a direction along the axial direction of the rotary operation shaft 1. A plurality of plate-like fixed contacts arranged along a plane perpendicular to the central axis of the rotational operation axis along an arc centered on the central axis of the rotational operation shaft 1, A conductive arm 4 'that is attached to the end and rotates with the rotation of the rotary operation shaft 1 is provided at the tip of the arm with the central axis directed in a direction perpendicular to the axis of the rotary operation shaft 1. The roller contact is rotatably supported by the conductive roller support shaft 5 and rolls on the electrode surface of each fixed contact as the arm rotates.

  In the illustrated example, the arm 3 includes a first arm 3A having a rear end attached to the rotation operation shaft 1, and a second arm 3B rotatably supported at the tip of the first arm 3A. It has become. A pair of second arms 3B are provided, and the pair of second arms 3B, 3B are arranged in the axial direction of the rotation operation shaft 1 with the first arm 3A interposed therebetween. The pair of second arms 3B and 3B are rotatably supported by the first arm 3A, and a pair of roller support shafts 5 and 5 are integrally provided at the tips of the second arms 3B and 3B, respectively.

  A pair of roller contacts 4 ′ are provided, and the pair of roller contacts 4 ′ and 4 ′ are supported by the pair of roller support shafts 5 and 5, respectively. The pair of roller contacts 4 ′ and 4 ′ are formed in a cylindrical shape, and are provided so as to contact the electrode surfaces 2 a and 2 a on both the front and back surfaces of each fixed contact with the fixed contacts 2 sandwiched therebetween. Further, a contact pressure applying mechanism that applies a contact pressure between the pair of roller contacts 4 ′ and 4 ′ and the electrode surface of each fixed contact by urging the pair of roller contacts 4 ′ and 4 ′ toward each other. 8,8 are provided. Although not shown, a flexible current collecting conductor is connected to the first arm 3A, and the roller contact 4 'passes through the roller support shaft 5, the second arm 3B, and the current collecting conductor to the outside. It is connected to a circuit (in the example of FIG. 5, vacuum valve V1).

  As shown in FIG. 5, when the roller contact 4 ′ is formed in a cylindrical shape, each part of the roller contact 4 ′ is rolled when the roller contact 4 ′ rolls along an arcuate locus. The rotational speed of the roller contact 4 'varies depending on the distance from the center of rotation of the roller contact to each part of the roller contact, although the amount of rolling required for the roller (the amount of displacement in the circumferential direction of the roller) varies depending on the distance 4 ′ is the same in each axial direction portion, so that slip occurs between the roller contact 4 ′ and the electrode surface 2a of the fixed contact 2, and friction occurs between the roller contact 4 ′ and the electrode surface of the fixed contact 2. Due to the force, the roller contact 4 ′ cannot be smoothly rolled, and problems such as early wear of the electrode surface 2 a occur.

  Therefore, as disclosed in Patent Document 1, the roller contact 4 'is formed in a frustoconical shape, and the end portion on the small diameter side is arranged toward the rotation center side of the roller contact 4'. Accordingly, a switch has been proposed in which the amount of rolling of each part of the roller contact 4 'in the axial direction is made equal to solve the above problem.

JP 2010-186719 A

  If the roller contact 4 'is formed in a frustoconical shape like the switch shown in Patent Document 1, the amount of rolling of each part in the axial direction of the roller contact 4' can be equalized. Slip can be prevented from occurring between the contact 4 'and the electrode surface 2a of the fixed contact 2, and the roller contact 4' can be smoothly rolled. Moreover, wear of the electrode surface can be suppressed by preventing the roller contact from slipping.

  However, since the frustoconical roller contact is troublesome to process, it is inevitable that the manufacturing cost is increased. Even if the roller contact has a frustoconical shape, if the machining accuracy is poor, the amount of rolling of each part in the axial direction cannot be made equal, and slip occurs between the roller contact and the electrode surface of the fixed contact. Can not prevent. Accordingly, in order to prevent slippage between the roller contact and the electrode surface of the fixed contact and to perform a stable switching operation by the configuration shown in Patent Document 1, when manufacturing the roller contact, It is necessary to strictly manage the processing accuracy, and it is inevitable that the manufacturing cost becomes high.

  In addition, when the roller contact is a truncated cone, the shape of the switch is different because the shape of the roller contact needs to be changed every time the distance between the center of rotation of the cola contact and the fixed contact is different. It is necessary to prepare a different roller contact for each, and it is impossible to reduce the cost by standardizing the roller contact.

  The object of the present invention is to enable the roller contact to be configured without requiring troublesome machining, and to share the same roller contact even when the distance between the rotation center of the roller contact and the fixed contact is different. Thus, it is an object of the present invention to provide a switch that can perform a stable operation without causing an increase in cost.

  Another object of the present invention is to make it possible to perform a stable operation without causing an increase in cost, and to make the roller contact a multi-point contact with the electrode surface of the fixed contact. An object of the present invention is to provide a switch that can increase the current carrying capacity.

  Still another object of the present invention is to enable stable operation without incurring an increase in cost, and to easily follow the roller contact even when the electrode surface of the fixed contact is uneven, An object of the present invention is to provide a switch capable of performing stable energization.

  The present invention includes a rotary operation shaft that is rotatably supported and operated to rotate in one direction and the other direction, and an electrode surface that faces in a direction along the axial direction of the rotary operation shaft. A plurality of plate-like fixed contacts arranged along a circular arc centered on the central axis on a plane perpendicular to the central axis of the rotation operation axis, and the rotation operation axis with a rear end attached to the rotation operation axis And a conductive arm that rotates as the arm rotates, and is supported rotatably at the tip of the arm with the central axis oriented in a direction perpendicular to the axis of the rotation operation shaft. And a roller contact that rolls on the electrode surface of each fixed contact, and is a switch that switches the fixed contact on which the roller contact rolls as the rotary operation shaft rotates.

  In the present invention, a plurality of conductive rollers are arranged side by side with their central axes oriented in a direction perpendicular to the axis of the rotation operation shaft, and are rotatably supported by the arm via the roller support shaft. A roller contact was constructed. The plurality of rollers are provided so as to be able to rotate independently of each other.

  As described above, when the roller contact is composed of a plurality of rollers arranged in the axial direction and rotating independently of each other, the plurality of rollers rotate at different rotational speeds according to the distance from the rotation center of the roller contact. Then, since rolling is performed on the electrode surface of the fixed contact, it is possible to prevent slippage between the roller contact and the fixed contact and to always perform a stable switching operation.

  Moreover, when comprised as mentioned above, a troublesome machining is not required like the case where a roller contact is formed in a truncated cone shape. Even if the distance between the rotation center of the roller contact and the fixed contact is different, the diameter of each roller constituting the roller contact does not need to be different, so the distance between the rotation operation shaft and the fixed contact is different. It is possible to reduce the manufacturing cost by sharing parts for various types of switches.

  In addition, since the roller contact can be brought into contact with the electrode surface of the fixed contact at multiple points, the current carrying capacity can be increased. When the carrying capacity is the same, the roller contact Can be miniaturized.

  In a preferred aspect of the present invention, each fixed contact has an electrode surface facing the axial direction of the rotation operation shaft on both front and back surfaces, and the arm includes a first arm having a rear end attached to the rotation operation shaft; The first arm is provided so as to be aligned in the axial direction of the rotation operation shaft, and is rotatably supported at the tip of the first arm by a rotation shaft extending in a direction parallel to the axis of the rotation operation shaft. And a pair of second arms. In this case, a pair of roller contacts are provided, and the pair of roller contacts are supported on the tips of the pair of second arms via a roller support shaft, respectively, and the pair of roller contacts sandwich the fixed contacts therebetween. It is comprised so that both the front and back of each fixed contact may be contacted. In this aspect, there is also provided a contact pressure applying mechanism that applies a contact pressure between the pair of roller contacts and the electrode surfaces of the fixed contacts by urging the pair of roller contacts in a direction approaching each other.

  If comprised as mentioned above, since the contact area of a roller contact and a fixed contact can be increased, current capacity can be increased. Further, since the contact pressure between each roller contact and the fixed contact can be sufficiently secured, the contact resistance between the rotor contact and the fixed contact can be reduced.

  In another preferred aspect of the present invention, a conductive spring is inserted between each roller constituting the roller contact and a roller support shaft supporting each roller, and each roller is attached to the roller support shaft via the spring. The rollers that are brought into contact with each other and that constitute the roller contact can be displaced in the axial direction of the rotation operation shaft.

  If comprised as mentioned above, since each roller is accept | permitted separately to the axial direction of a rotating operation axis | shaft, the followable | trackability of a roller can be made favorable.

  According to still another preferred aspect of the present invention, the roller support shaft is individually provided for each of the plurality of rollers, and the roller support shaft provided for each roller is displaced in the axial direction of the rotation operation shaft. As can be seen, the second arm is supported via a conductive elastic support member.

  Also when comprised as mentioned above, since each roller is permitted to be individually displaced in the axial direction of the rotation operation shaft, the followability of the rollers can be improved.

  According to the present invention, since the roller contact is constituted by a plurality of rollers arranged side by side in the axial direction and rotating independently of each other, the plurality of rollers have different rotational speeds according to the distance from the rotation center of the roller contact. To prevent slippage between the roller contact and the fixed contact, and a stable switching operation can always be performed.

  Further, according to the present invention, no troublesome machining is required as in the case where the roller contact is formed in a frustoconical shape, and each roller constituting the roller contact includes a rotation operation shaft and a fixed contact. The same size can be used regardless of the distance between the rotating operation shaft and the parts for the various types of switches with different distances between the rotary operation shaft and the fixed contact. Reduction can be achieved.

According to the invention of any one of claims 2 to 5, since each roller is allowed to be individually displaced in the axial direction of the rotation operation shaft, the followability of the roller can be improved. The reliability of the switch can be increased.

It is the top view which showed roughly the structure of the principal part of one Embodiment of this invention. It is a side view of the principal part of embodiment of FIG. It is sectional drawing which showed the principal part of other embodiment of this invention. (A), (B) shows the structure of the principal part of further another embodiment of this invention, (A) is a side view, (B) is a perspective view of the upper half part of (A). . It is the side view which showed the structure of the principal part of the conventional switch. It is a circuit diagram showing composition of a change-over switch of a load tap change device as an example of a switch to which the present invention is applied.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2 show the configuration of the first embodiment of the present invention. In these drawings, 1 can be rotated by a bearing device (not shown) so that it can rotate around an axis O1-O1. It is a rotation operation shaft that is supported and operated to rotate in one direction and the other direction by a storage mechanism (not shown). Reference numerals 2 and 2 denote a plurality (in the illustrated example, arranged side by side on a plane orthogonal to the central axis O1-O1 of the rotary operation shaft 1 along an arc centered on the central axis O1-O1 of the rotary operation shaft 1. Each of the fixed contacts 2 has electrode surfaces 2a, 2a facing the direction along the axial direction of the rotation operation shaft 1 on the front and back sides.

  Reference numeral 3 denotes a conductive arm whose rear end is fixed to the rotary operation shaft 1 and rotates on a plane perpendicular to the axis of the rotary operation shaft 1 as the rotary operation shaft 1 rotates. The roller contact is rotatably supported by a conductive roller support shaft 5 provided at the tip of the arm 3 with the central axis oriented in a direction perpendicular to the first axis O1-O1. The roller contact 4 rolls on the electrode surface 2 a of each fixed contact 2 while rotating along an arc centered on the central axis of the rotation operation shaft 1 as the arm 3 rotates.

  In the illustrated example, the arm 3 is provided so as to extend in a direction perpendicular to the axis of the rotation operation shaft 1, and the first arm 3A having a rear end portion fixed to the rotation operation shaft 1, The arm 3 </ b> A is provided so as to be aligned in the axial direction of the rotary operation shaft 1, and is rotatable to the tip of the first arm 3 </ b> A by a rotary shaft 11 extending in a direction parallel to the axis of the rotary operation shaft 1. It consists of a pair of supported second arms 3B, 3B.

  A pair of roller support shafts 5 are provided, and the pair of roller support shafts 5 and 5 are arranged in a state in which the center axis O2-O2 is directed in the longitudinal direction of the pair of second arms 3B and 3B. The second arms 3B and 3B are integrally provided at the distal ends. A pair of roller contacts 4 is also provided, and the pair of roller contacts 4, 4 are rotatably supported by a pair of roller support shafts 5, 5, respectively. The pair of roller contacts 4 and 4 are brought into contact with both front and back surfaces of each fixed contact with the fixed contacts 2A and 2B being sandwiched therebetween.

  Projections 301 (see FIG. 2) projecting to the first arm 3A side are provided on the portions of the second arms 3B located on the rotation operation shaft 1 side with respect to the rotation shaft 11, and each second arm 3B is provided with a second projection. The protrusion 301 of the arm 3B is brought into contact with the first arm 3A.

  The rotation shaft 11 is provided in a state of penetrating the tip end portion of the first arm 3A and the intermediate portion of the second arms 3B and 3B, and the second arm 3B and 3B of the rotation shaft 11 is provided. Contact pressure springs 12 and 12 are fitted to the portions protruding through and projecting up and down, respectively. Spring receiving plates 13 and 13 are respectively fitted to portions near both ends of the rotating shaft 11, and spring receiving plates 13 and 13 are inserted by split pins 14 and 14 inserted into through holes formed in the rotating shaft 11. Is prevented from coming off from the rotating shaft 11 and displacement of the rotating shaft 11 in the axial direction is restricted. The contact pressure springs 12 and 12 are held in a compressed state between the spring receiving plates 13 and 13 and the second arms 3B and 3B, and the roller contacts 4 and 4 are fixed to the fixed contact 2 side by these contact pressure springs. Is being energized. In this embodiment, the rotating shaft 11, the contact pressure springs 12 and 12, and the spring receiving plates 13 and 13 urge the pair of roller contacts 4 and 4 toward each other, thereby A contact pressure applying mechanism 15 for applying a contact pressure is formed between the electrode surfaces 2a and 2a of the fixed contacts.

  As shown in FIG. 1, a flexible current collecting conductor 19 is connected to the first arm 3A, and the roller contact 4 is connected to the roller support shaft 5, the second arm 3B, and the first arm 3A. The arm 3A and the current collector 19 are connected to an external circuit. When the switch of this embodiment is used as the auxiliary switch SW of the switching switch shown in FIG. 6, one and the other of the fixed contacts 2 and 2 constitute the fixed contacts S1 and S2, respectively. The roller contact 4 constitutes a movable contact S0, and the current collecting conductor 19 is connected to the vacuum valve V1.

  In the present embodiment, each roller contact 4 is composed of a plurality of (four in the illustrated example) rollers 400, 400,. The plurality of rollers 400, 400,... Are arranged side by side with their central axes oriented in the direction of the axis O 2 -O 2 of the roller support shaft 5, and are rotatably supported on the roller support shaft 5 so as to be able to rotate independently of each other. Has been.

  When the roller contact 4 is configured by a plurality of rollers 400 that are arranged side by side in the axial direction and rotate independently of each other as in the present embodiment, the plurality of rollers 400 are separated from the rotation center O1-O1 of the roller contact 4. Since it can be rotated on the electrode surface of the fixed contact by rotating at different rotational speeds according to the distance, it is possible to prevent slippage between the roller contact 4 and the fixed contact 2 and to perform stable switching operation. Can be performed.

  Moreover, when comprised as mentioned above, when manufacturing the roller contact like the case where the roller contact 4 is formed in a frustoconical shape, the troublesome machining which requires exact | strict management of a processing precision is not required. Further, even if the distance between the rotation center O1-O1 of the roller contact and the fixed contact 2 is different, the diameter of each roller 400 constituting the roller contact 4 does not need to be different. The common roller 400 is used for various types of switches having different distances from each other, so that the parts can be shared and the manufacturing cost can be reduced.

  Further, when the roller contact 4 is constituted by a plurality of rollers 400 as described above, the roller contact 4 can be brought into contact with the fixed contact 2 at multiple points, so that the current carrying capacity of the switch can be increased, and the carrying capacity can be increased. If the two are the same, it is possible to reduce the size of the roller contact.

  FIG. 3 shows a main part of the second embodiment of the present invention. In this embodiment, a corrugated conductive spring 20 is inserted between each roller 400 constituting the roller contact 4 and the roller support shaft 5, and each roller 400 is supported by each roller support shaft 5 via the spring 20. Has been. The conductive spring 20 contacts both the roller 400 and the roller support shaft 5 to electrically connect them. If comprised in this way, since each roller 400 which comprises the roller contact 4 is permitted to displace to the axial direction of the rotating operation shaft 1, the followable | trackability of a roller can be made favorable.

  FIGS. 4A and 4B show the main part of the third embodiment of the present invention. In this embodiment, a roller support shaft is provided in common for a plurality of rollers 400. Instead, a roller support shaft 500 is individually provided for each of the plurality of rollers 400, 400,..., And the roller support shaft 500 provided for each roller 400 is the axial direction of the rotary operation shaft 1 (see FIG. 4 is supported by the second arm 3B via a conductive elastic support member 21 so that it can be displaced in the vertical direction.

  In the illustrated example, the elastic support member 21 is provided and fixed with a base portion 21a electrically and mechanically connected to the second arm 3B by welding or the like, and a rear end portion integrated with the base portion 21a. It is formed in a shape having an arm portion 21b extending obliquely toward the contact 2 and a bifurcated roller support portion 21c integrally formed at the tip of the arm portion 21b. The roller 400 is inserted between the bifurcated portions of the roller support portion 21c of the elastic support member 21, and is rotatably supported by the roller support portion 21c by a roller support shaft 500 penetrating the bifurcated portion. Each roller 400 is allowed to be displaced in the axial direction of the rotation operation shaft 1 by the elasticity of the arm portion 21b of the elastic support member 21. In this case, the roller 400 may be fixed to the roller support shaft 500, and the roller support shaft 500 may be rotatably supported by the roller support portion 21c. The roller support shaft 500 may be fixed to the roller support portion 21c. The roller 400 may be rotatably supported on the roller support shaft 500.

  Even in such a configuration, each roller 400 is allowed to be individually displaced in the axial direction of the rotation operation shaft, so that the followability of the roller contact can be improved.

  In the above embodiment, only two fixed contacts 2 are provided, but the present invention can of course be applied to a switch provided with three or more fixed contacts.

  In the above embodiment, the roller contact 4 is constituted by five rollers 400, but the roller contact 4 may be constituted by a plurality of rollers 400, and the number of rollers 400 is arbitrary. The number of rollers 400 can be increased or decreased according to the current capacity.

  In the above description, the switch according to the present invention is used as an auxiliary switch of the on-load tap switching device, but it can of course be used for other purposes.

DESCRIPTION OF SYMBOLS 1 Rotation operation shaft 2 Fixed contact 3 Arm 3A 1st arm 3B 2nd arm 4 Roller contact 400 Roller 5,500 Roller support shaft 11 Rotating shaft 12 Contact pressure spring 13 Nut 21 Elastic support member

Claims (5)

A rotation operation shaft that is rotatably supported and operated to rotate in one direction and the other direction, and a center axis of the rotation operation shaft having an electrode surface oriented in a direction along the axial direction of the rotation operation shaft A plurality of plate-like fixed contacts arranged side by side on a plane perpendicular to the central axis of the rotation operation axis along an arc centered on the rotation operation shaft, and a rear end portion attached to the rotation operation shaft, the rotation operation A conductive arm that rotates as the shaft rotates, and a rotating arm that is rotatably supported at the tip of the arm with the central axis oriented in a direction perpendicular to the axis of the rotation operation shaft. A roller contact that rolls on the electrode surface of each fixed contact with movement, and a switch that switches the fixed contact on which the roller contact rolls with the rotation of the rotation operation shaft.
The roller contacts are arranged side by side with their central axes oriented in a direction perpendicular to the axis of the rotational operation shaft, and a plurality of conductive contacts rotatably supported by the arms via roller support shafts. Made of rollers,
The plurality of rollers are provided to be able to rotate independently of each other ,
Each fixed contact has an electrode surface facing both the front and back surfaces in the axial direction of the rotation operation shaft,
The arm is provided with a first arm having a rear end attached to the rotation operation shaft, and arranged in the axial direction of the rotation operation shaft with the first arm interposed therebetween, and the rotation operation shaft A pair of second arms rotatably supported at the tip of the first arm by a rotation shaft extending in a direction parallel to the axis of
A pair of the roller contacts are provided, and the pair of roller contacts are respectively supported at the tips of the pair of second arms via a roller support shaft, and the pair of roller contacts interpose the fixed contacts. It is configured to contact both the front and back surfaces of each fixed contact in a sandwiched state,
A contact pressure applying mechanism is provided that applies a contact pressure between the pair of roller contacts and the electrode surface of each fixed contact by urging the pair of roller contacts in a direction approaching each other;
A switch characterized by. A rotation operation shaft that is rotatably supported and operated to rotate in one direction and the other direction, and a center axis of the rotation operation shaft having an electrode surface oriented in a direction along the axial direction of the rotation operation shaft A plurality of plate-like fixed contacts arranged side by side on a plane perpendicular to the central axis of the rotation operation axis along an arc centered on the rotation operation shaft, and a rear end portion attached to the rotation operation shaft, the rotation operation A conductive arm that rotates as the shaft rotates, and a rotating arm that is rotatably supported at the tip of the arm with the central axis oriented in a direction perpendicular to the axis of the rotation operation shaft. A roller contact that rolls on the electrode surface of each fixed contact with movement, and a switch that switches the fixed contact on which the roller contact rolls with the rotation of the rotation operation shaft.
The roller contacts are arranged side by side with their central axes oriented in a direction perpendicular to the axis of the rotational operation shaft, and a plurality of conductive contacts rotatably supported by the arms via roller support shafts. Made of rollers,
The plurality of rollers are provided to be able to rotate independently of each other,
A conductive spring is inserted between each roller constituting the roller contact and a roller support shaft supporting each roller, and each roller is brought into contact with the roller support shaft via the spring,
Each roller constituting the roller contact is configured to be able to be displaced in the axial direction of the rotation operation shaft ;
A switch characterized by. A rotation operation shaft that is rotatably supported and operated to rotate in one direction and the other direction, and a center axis of the rotation operation shaft having an electrode surface oriented in a direction along the axial direction of the rotation operation shaft A plurality of plate-like fixed contacts arranged side by side on a plane perpendicular to the central axis of the rotation operation axis along an arc centered on the rotation operation shaft, and a rear end portion attached to the rotation operation shaft, the rotation operation A conductive arm that rotates as the shaft rotates, and a rotating arm that is rotatably supported at the tip of the arm with the central axis oriented in a direction perpendicular to the axis of the rotation operation shaft. A roller contact that rolls on the electrode surface of each fixed contact with movement, and a switch that switches the fixed contact on which the roller contact rolls with the rotation of the rotation operation shaft.
The roller contacts are arranged side by side with their central axes oriented in a direction perpendicular to the axis of the rotational operation shaft, and a plurality of conductive contacts rotatably supported by the arms via roller support shafts. Made of rollers,
The plurality of rollers are provided to be able to rotate independently of each other,
The roller support shaft is individually provided for each of the plurality of rollers, and the roller support shaft provided for each roller can be displaced in the axial direction of the rotation operation shaft. Being supported by the second arm via a conductive elastic support member ;
A switch characterized by. A conductive spring is inserted between each roller constituting the roller contact and a roller support shaft supporting each roller, and each roller is brought into contact with the roller support shaft via the spring,
Each roller constituting the roller contact is configured to be able to be displaced in the axial direction of the rotation operation shaft;
The switch according to claim 1 . The roller support shaft is individually provided for each of the plurality of rollers, and the roller support shaft provided for each roller can be displaced in the axial direction of the rotation operation shaft. Being supported by the second arm via a conductive elastic support member;
The switch according to claim 1 .

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