WO2019058631A1 - Switch - Google Patents

Abstract

In this switch, one end section (EP) of a blade (2) is pivotally mounted, in a pressure-contacting state, onto a fixed contactor (1a) while rotation operation of the blade (2) brings the other end section (EF) thereof into pressure-contact with a fixed contactor (1b). In this switch, the conductive contact surface in the one end section (EP) of the blade (2) to the fixed contactor (1a) and the conductive contact surface in the other end section (EF) of the blade (2) to the fixed contactor (1b) are each provided with at least one slit (8) dividing the corresponding conductive contact surface, whereby multi-point contacts are established on each of the conductive contact surfaces.

Description

Switch

The present application relates to a switch.

For example, as described in FIG. 4 of JP-A-3-257722 (Patent Document 1), the disconnecting switch and the earthing switch mounted on the gas-insulated switchgear have two sets of fixed contacts and one fixed contact. It consists of a blade (movable contact) consisting of a pair of parallel contacts facing each other with a center of rotation on the rotor, two sets of contact pressure springs, links and pins, and by applying a contact pressure spring load to the blade The fixed contacts on the rotation center side, the power receiving side, the power feeding side, and the ground side are mechanically and electrically connected, and are energized or grounded.

Japanese Patent Application Laid-Open No. 2001-37025 (Patent Document 2) relates to a switch gear, and FIG. 5 shows a configuration in which a display similar to a cut is provided at the tip of the movable contact 26C. However, there is no description on the specific configuration and effects of the display similar to a notch at the tip of the movable contact 26C, and the other end where the movable contact 26C is pivotally mounted has a pivoting configuration It is only shown.

JP, 03-257722, A (Figure 3, Figure 4) JP 2001-37025 A (FIG. 5)

As described above, the circuit of the disconnecting switch and the grounding switch mounted on the gas-insulated switchgear is composed of a metal fixed contact, a blade, a contact pressure spring, a link, and a pin. In the case of a closed circuit, when a large current flows, an electromagnetic force is generated, and the contact portion between the blade and the fixed contact is separated by the electromagnetic force, arcing from the gap between the contacts and welding between the contacts It is necessary to load the contact pressure between the contacts with a contact pressure spring load larger than the electromagnetic force.

Therefore, in circuit assembly, since it is necessary to assemble while compressing the contact pressure spring, special assembly jigs are required for assembly of the blade and the fixed contact, which increases the number of steps for manual assembly. . In addition, due to the high contact pressure load between the contacts, when the circuit is repeatedly opened and closed, mechanical wear occurs on each conductive contact surface due to the sliding of the contacts, and the contact resistance and sliding load increase. Failure occurs in the operation of the switch and switch, and the reliability decreases. Furthermore, the problem is that the load on the operating device due to the repeated opening and closing of the circuit is large due to the high contact pressure load between the contacts.

The switch disclosed in the present application includes a first fixed contact, a second fixed contact disposed at a predetermined distance from the first fixed contact, and one end of the first fixed contact. Blade connected to the second fixed contact by being pivotally connected to the second fixed contact by pivoting operation of the operation device, and connected electrically by bridging the first and second fixed contacts. One end of the blade is in pressure contact with the first fixed contact, and the other end of the blade is joined to the second fixed contact to the second fixed contact The conductive contact surface to the first fixed contact at one end of the blade, the conductive contact surface to the second fixed contact at the other end of the blade, or Conductive contact to one end of the blade at the first fixed contact And wherein the second conductive contact surface of the other end portion of the blade in the fixed contact of, is characterized in that at least one slit dividing each of the conductive contact surface is provided.

According to the switch disclosed in the present application, the conductive contact surfaces at the one end and the other end of the blade are brought into multipoint contact by the slits, so that both the one end and the other end of the blade are rotated. The contact pressure load on each conductive contact surface in the above can be reduced in a well-balanced manner, and the reliability of the switch can be improved and the service life can be prolonged.

FIG. 2 is a structural view showing a configuration of the switch in the open circuit state according to Embodiment 1; FIG. 2 is a structural view showing a configuration of the switch in the closed state in the first embodiment. The top view and end view which show the structure of the switchgear blade in Embodiment 1. FIG. FIG. 7 is a diagram showing the relationship between a contact pressure load and an electric current regarding welding of contacts. FIG. 6 is a structural view showing a configuration of a switch in Embodiment 2; FIG. 10 is a structural view showing a configuration of a switch in Embodiment 3; The circuit diagram which shows the connection relation of the switching equipment mounted in the gas insulation switchgear.

Embodiment 1
The first embodiment will be described with reference to FIGS. 1 to 4 and FIG. FIG. 1 is a structural view showing the configuration of the switch in the open circuit state according to Embodiment 1, FIG. 1 (a) is a side view, FIG. 1 (b) is a front view, and FIG. 1 (c) is a contact pressure It is a detailed structural drawing which shows the mounting state of a spring. FIG. 2 is a structural view showing a configuration of the switch in the closed state in Embodiment 1, FIG. 2 (a) is a side view, and FIG. 2 (b) is a front view. FIG. 2 (c) is a detailed structural view showing the mounted state of the contact pressure spring. FIG. 3 is a structural view showing the configuration of the switchgear blade in the first embodiment, FIG. 3 (a) is a plan view, and FIG. 3 (b) is an end view. FIG. 4 is a diagram showing the relationship between the contact pressure load and the current concerning welding of the contacts. FIG. 7 is a partial circuit diagram showing the connection of the switchgear mounted on the gas-insulated switchgear.

As the switchgear mounted on the gas-insulated switchgear, as shown in FIG. 7, the switchgear is configured of a circuit breaker CB, a disconnector, and a switch EDS such as a ground switch.
A switch applied as a disconnecting switch mounted on a gas-insulated switchgear is configured as shown in FIGS. 1 (a) and 1 (b). FIG. 1 (c) shows the mounted state of the contact pressure spring 3a.
The connection pin 6 is attached to the operation link 7 connected to the drive part of the operation device, and both ends of the connection pin 6 constitute the blade 2 and of the two plate- like pieces 2a and 2b extending in the longitudinal direction The blade 2 and the operation link 7 are connected with each other by being inserted into the pin holes 14 provided in the central portion CP.

The stepped pin holes 13 and 13 provided in the plate- like pieces 2 a and 2 b and the stepped pin holes 13 a provided in the fixed contact 1 a are connected by the stepped pin 4 a at one end EP of the blade 2 Ru. The stepped pin 4a pivotally attaches the plate- like pieces 2a and 2b to the fixed contact 1a at one end EPa and EPb thereof, and the blade 2 has the stepped pin 4a as a pivot and the one end EP as a rotation center It is pivotally attached.
Then, as shown in FIG. 1 (c), a contact pressure spring is applied to one surface side of the blade 2 and the stepped pin stepped portion 15 of the stepped pin 4a so that a contact pressure is applied between the blade 2 and the fixed contact 1a. 3a is attached.

The fixed contact 1a and the blade 2 come into contact with each other by the contact pressure of the contact pressure spring 3a, and the conductive contact surface areas SPa and SPb of the plate- like pieces 2a and 2b constituting the blade 2 are provided with the slits 8. . The slit 8 is a linear slit provided in the conductive contact surface areas SPa and SPb of the plate- like pieces 2 a and 2 b constituting the blade 2 with respect to the fixed contact 1 a, and the plate-like piece constituting the blade 2 Conducting contact surface areas SPa and SPb with respect to the fixed contacts 1a of 2a and 2b are divided to make the blade 2 and the fixed contacts 1a in a multipoint contact relationship. The slit 8 divides the depth direction of the conductive contact surface areas SPa and SPb shown in FIG. 1A and FIG. 1C by a slit, thereby making the blade 2 and the fixed contact 1a multipoint Make contact relationship.

Here, the slit 8 has a plate shape so as to obtain a depth of a predetermined dimension or more, for example, 1 mm or more, for the purpose of ensuring division of the conductive contact surface areas SPa and SPb for securing the multipoint contact relationship. It is set as the slit which penetrates each both sides of piece 2a, 2b. If a depth equal to or greater than a predetermined dimension, for example, 1 mm, is obtained, the groove may have a bottom having a depth equal to or greater than the predetermined dimension instead of the slit. The slit or groove constituting the slit 8 has a width equal to or greater than a predetermined dimension, for example, 1 mm or more, in order to ensure division of the conductive contact surface area SPa and SPb for securing the multipoint contact relationship. ing. The slit 8 is provided in each of the plate- like pieces 2a and 2b which respectively form the strip shape constituting the blade 2 and extends along the direction in which the plate- like pieces 2a and 2b extend. It is. The slit 8 divides the conductive contact surface areas SPa and SPb of the plate- like pieces 2a and 2b constituting the blade 2 with respect to the fixed contact 1a, and the conductive contact surface areas other than the conductive contact surface areas SPa and SPb. It is possible to extend beyond the regions SPa, SPb. Further, as will be described later, the slits 8 are also provided at the other ends EFa and EFb of the plate- like pieces 2a and 2b, and one end EPa and EPb of the plate- like pieces 2a and 2b and the other end EFa and EFb The slits 8 provided on both sides are formed symmetrically with each other.

The operation mode of the switch shown in FIG. 1 (a) and FIG. 1 (b) shows an open circuit state. The fixed contact 1a and the blade 2 are always in contact with each other, whereas the fixed contact 1a and the blade 2 are in a noncontacting insulating state, and the electric path between the fixed contact 1a and the fixed contact 1b is open It is done.
Between the other ends EFa and EFb of the plate- like pieces 2a and 2b at the other end EF of the blade 2, the fixed contact 1b is inserted between the plate- like pieces 2a and 2b at the time of closing operation. Therefore, the cylindrical spacer 5 is fitted to the stepped pin 4b so as to secure the gap g between the plate- like pieces 2a and 2b.
When the switch is switched to the closed state, the operation link 7 is moved in the right direction in the figure by driving of the operating device by the operation command, and the blade 2 is rotated counterclockwise so that the other end portion EF of the blade 2 Is moved toward the fixed contact 1b, and the plate- like pieces 2a and 2b hold the fixed contact 1b in a state of being held in contact with each other, as shown in FIGS. 2 (a) and 2 (b). It becomes a closed state. The plate- like pieces 2a and 2b constituting the blade 2 bridge the fixed contact 1a and the fixed contact 1b and electrically and mechanically connect the fixed contacts 1a and 1b.

A contact pressure spring 3 b is attached between one side of the blade 2 and the stepped portion of the stepped pin 4 b, and a spacer 5 is attached between the gaps of the blade 2. At this time, in order to generate contact pressure between the contacts, the thickness of the fixed contacts 1a and 1b is made larger than the gap g of the blade 2 (see FIG. 1A). It has a deformable structure.
The thickness dimension inserted between the other ends EFa and EFb of the plate- like pieces 2a and 2b of the fixed contact 1b is the gap g between the plate- like pieces 2a and 2b secured by the spacer 5 (see FIG. 1 (a)), and the conductive contact surface area SFa, SFb between the fixed contact 1b and the plate- like piece 2a, 2b is subjected to a predetermined contact pressure load by the contact pressure spring 3b. Is applied. FIG. 2 (c) shows the mounted state of the contact pressure spring 3b.

In the closed state of the switch, as shown in FIGS. 2 (a) and 2 (b), the blade 2 and the fixed contact 1b are mechanically and electrically connected by the contact pressure load by the contact pressure spring 3b. The circuit is formed on the power supply side or the ground side. Moreover, in the state of a closed circuit, it is set as the structure which makes the slit 8 of the braid | blade 2 at least 1 mm or more deeper than the part which the braid | blade 2 and fixed contactor 1a, 1b contact. In this structure, the slit 8 of the blade 2 is reliably separated from the conductive contact surface with the fixed contacts 1a and 1b, and the current is divided (the slit 8 is in full contact with the fixed contacts 1a and 1b) And can not split). A slit 8 similar to that in the one end EP of the blade 2 is also provided on the side of the other end EF which is the free rotation end of the blade 2. The conductive contact surface area SFa, SFb where the other ends EFa, EFb of the plate- like pieces 2a, 2b contact the fixed contact 1b in a closed state of the switch is provided with a slit 8 to configure the blade 2. Conducting contact surface areas SFa and SFb of the plate- like pieces 2a and 2b with respect to the fixed contact 1b are divided to make the blade 2 and the fixed contact 1b in a multipoint contact relationship.

Then, as shown in FIGS. 3A and 3B, the entire circumference of the slit 8 provided in one end EPa, EPb and the other end EFa, EFb of the plate- like pieces 2a, 2b constituting the blade 2 and A chamfered portion 9 having an arc-shaped curved surface by so-called R processing is provided at edges around the plate- like pieces 2a and 2b. By providing the chamfered portion 9 by R processing, the amount of mechanical wear due to the sliding of the conductive contact surfaces of the blade 2 and the fixed contacts 1a and 1b can be reduced, and high reliability and long life can be realized. Further, a stepped pin hole 13 for the stepped pins 4a and 4b and a pin hole 14 for the connecting pin 6 connected to the operation link 7 are provided. The slits 8 respectively provided at the end portions EPa, EPb and the other end portions EFa, EFb of the plate- like pieces 2a, 2b are formed as symmetrical shapes with one end portions EPa, EPb and the other end portions EFa, EFb. .

As described above, in the first embodiment, conductive contact surface areas SPa, SPb, SFa, and SFb for fixed contacts 1a and fixed contacts 1b of plate- like pieces 2a and 2b at both ends EP and EF of blade 2 are shown. The contact between the plate- like pieces 2a and 2b with respect to the fixed contact 1a and the fixed contact 1b is divided by the slit 8 to provide multipoint contact at both ends EP and EF of the blade 2.
By making the contact relation to the fixed contacts 1a and 1b at both ends EP and EF of the blade 2 respectively be multipoint contact, each conducting contact surface at both ends EP and EF at both ends EP and EF of the blade 2 to be pivoted The contact pressure load of the above can be reduced in a well-balanced manner, and the reliability of the switch can be improved and the service life can be prolonged.

FIG. 4 is a diagram showing the relationship between the current value per contact point of the contact and the contact pressure load where welding does not occur, and slits 8 are provided at both ends of the blade 2 or the fixed contact of FIG. By providing the slits 8 in the elements 11a and 11b, the amount of current per contact point is reduced to 1⁄2, and the contact pressure spring load is 1⁄4 from the threshold value of the contact pressure spring load where welding between the contacts does not occur. Indicates that it can be reduced.

(1) As the switch in Embodiment 1 is shown by FIGS. 1-3, the following structures are applied.
A first fixed contact 1a, a second fixed contact 1b disposed at a predetermined distance from the first fixed contact 1a, and an end portion EP of the first fixed contact 1a And the other end EF is joined to the second fixed contact 1b by a pivoting operation by the operating device having the operation link 7 and is bridged to the first and second fixed contacts 1a and 1b. The blade 2 electrically and mechanically connects the first and second fixed contacts 1a and 1b electrically and mechanically, and an end portion EP of the blade 2 contacts the first fixed contact 1a by a contact pressure spring 3a. The other end portion EF of the blade 2 is in pressure contact with the second fixed contact 1b in a state of being joined to the second fixed contact 1b by a contact pressure spring 3b.

The blade 2 is formed by a pair of strip-shaped pieces 2a, 2b extending in the longitudinal direction and facing each other, and one end EPa, EPb of the pair of pieces 2a, 2b. The pair of plate- like pieces 2a, 2a, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2b, 2c, 2b, 2b, 2b, 2c, 2b, 2b, 2c, 2b, 2c, 2b, 2c, 2b, 2b, 2c, 2b, 2b, 2c with the first stationary contact 1a held in pressure contact with each other, The second fixed contact 1b is pressed and held between the other end portions EFa and EFb in 2b, and the first at the end portions EPa and EPb of the pair of plate- like pieces 2a and 2b. Conductive contact surfaces SPa and SPb to the fixed contact 1a of the second conductive contact, and conductive contacts to the second fixed contact 1b at the other ends EFa and EFb of the pair of plate- like pieces 2a and 2b Each of the faces SFa and SFb The conductive contact surface SPa, SPb, SFa, at least one slit 8 is provided to divide the SFb, each of the conductive contact surface SPa, SPb, SFa, characterized by a multi-point contact at SFb.

Based on this configuration, the conductive contact surfaces SPa, SPb, SFa, and SFb at the one end EP and the other end EF of the blade 2 are brought into multipoint contact by the slit 8, whereby one end of the blade 2 is rotated. The contact pressure load on each conductive contact surface at both the portion EP and the other end portion EF can be reduced in a well-balanced manner, and the reliability of the switch can be improved to prolong the life.

That is, by providing the slits 8 at both ends of the blade 2 and bringing them into contact with the fixed contacts 1a and 1b at multiple points, it is possible to divide the large current in the closed circuit and reduce the current flowing per contact point. Therefore, the contact pressure spring load can be reduced to prevent arcing between contacts due to opening of contact parts and welding of metal contacts due to the electromagnetic force at the time of large current generation, and the contact pressure spring load is conventionally large. Thus, although the circuit is assembled with the special assembly jig, manual assembly becomes possible, and the number of man-hours can be reduced.

In addition, it is necessary to make the thickness of the fixed contact 1b larger than the gap g between the plate- like pieces 2a and 2b of the pair of blades 2 in order to generate contact pressure between the contacts when opening and closing the circuit. When moving to a closed circuit, the blade 2 and the tip of the fixed contact 1b first contact each other, and the conductive contact surface of the fixed contact 1b is slid while expanding the gap g between the plate- like pieces 2a and 2b of the blade. Although the mechanical contact of the conductive contact surface is greatly affected by the movement, there is a concern about the contact resistance of the conductive contact surface and the rise of the sliding load, but the contact load can be reduced by reducing the contact spring load. The amount of mechanical wear on the sliding surface of the bearing can be reduced, and high reliability and long life can be achieved.

(2) As the switch in Embodiment 1 is shown by FIGS. 1-3, in the structure of the said (1) term, the following structures are applied.
The slits 8 extend in the longitudinal direction of the pair of plate-shaped pieces 2 a and 2 b of the blade 2.
According to this configuration, the slits 8 for establishing the multipoint contact relationship can be appropriately disposed in accordance with the shape of the blade 2, and an accurate configuration can be secured.

(3) As the switch in Embodiment 1 is shown by FIGS. 1-3, in the structure of said (1) term or the said (2) term, the following structures are applied.
The slits 8 provided at one end EPa, EPb and the other end EFa, EFb of the pair of plate- like pieces 2a, 2b are characterized in that they are formed symmetrically.
With this configuration, the contact pressure load on each conductive contact surface at both the one end EP and the other end EF of the blade 2 to be pivoted is further reduced in a balanced manner, and the reliability of the switch is improved. It is possible to extend the life.

(4) As shown in FIGS. 1 to 3, in the switch according to the first embodiment, the following configuration is applied to any of the configurations from the above (1) to (3). .
At the edges of the conductive contact surfaces SPa, SPb, SFa, and SFb provided with the slits 8, a chamfered portion 9 having an arc-shaped curved surface on which a so-called R processing is performed is provided. .
With this configuration, the amount of mechanical wear due to the sliding of the conductive contact surfaces SPa, SPb, SFa, and SFb of the blade 2 and the fixed contacts 1a and 1b, which are multipoint contacts, can be reduced, and high reliability and long life are achieved. Is possible.

Second Embodiment
A second embodiment will be described with reference to FIG. Fig.5 (a) is a structural diagram which shows the structure in the closed state of the switch in Embodiment 2, FIG.5 (b) is a top view which shows the structure of a stationary contact.

The basic configuration of the switch in the second embodiment is the same as the configuration in the first embodiment. The difference from the first embodiment of the configuration shown in the second embodiment is that the slits 8 are provided on the fixed contactors 11a and 11b side to make multipoint contact with the blade 12. Further, as shown in FIG. 5C which is a plan view of the fixed contact 11b and FIG. 5D which is an end view, on the entire circumference of the slit 8 of the fixed contact 11a, 11b and the edge around the contact A chamfered portion 9 is provided by so-called R processing, and in order to generate a contact pressure between the contacts as in FIG. 1, the fixed contacts 11 a and 11 b are formed more than the gap g of the blade 12 (see FIG. 1 (a)) By increasing the thickness, the contact pressure spring can be deformed.
In the closed state, the slits 8 provided in the fixed contacts 11a and 11b are made deeper by at least 1 mm or more than the portion where the blade 12 and the fixed contacts 11a and 11b contact.

The slits 8, 8 provided in the fixed contacts 11a, 11b extend in the extending direction of the blade 12 in the closed state, and are provided in symmetrical shapes with each other. In addition, the fixed contacts 11a and 11b provided with the slits 8 are formed symmetrically with each other.

(1) As the switch in Embodiment 2 is shown by FIG. 5, the following structure is applied.
A first fixed contact 11a, a second fixed contact 11b disposed at a predetermined distance from the first fixed contact 11a, and an end portion EP of the first fixed contact 11a And the other end EF is joined to the second fixed contact 1b by a pivoting operation by the operating device having the operation link 7 and is bridged to the first and second fixed contacts 11a and 11b. The blade 12 electrically and mechanically connects the first and second fixed contacts 11a and 11b electrically and mechanically, and one end EP of the blade 12 is pressure-welded to the first fixed contact 11a by a contact pressure spring. At the same time, the other end EF of the blade 12 is in pressure contact with the second fixed contact 11b by a contact pressure spring in a state of being joined to the second fixed contact 11b.

The blade 12 is formed by a pair of strip-shaped pieces extending in the longitudinal direction and facing each other, and the first fixed contact is made between the one ends of the pair of plate-shaped pieces. In the state where the other end portion EF of the blade 12 is joined to the second fixed contact 11b while press-contacting and holding the element 11a, the second portion is formed between the other end portions of the pair of plate-like pieces. The fixed contact 11b is pressed and held, and each conductive contact surface to one end of the pair of plate-like pieces in the first fixed contact 11a, and the second fixed contact 11b Each conductive contact surface to the other end of the pair of plate-like pieces in the above is provided with at least one slit 8 for dividing the respective conductive contact surface, and multiple points are provided at each conductive contact surface. It is characterized by being in contact .

With this configuration, the conductive contact surfaces of the fixed contacts 11a and 11b with respect to the one end EP and the other end EF of the blade 12 are brought into multipoint contact by the slits 8, whereby one end of the blade 12 is rotated. The contact pressure load on each conductive contact surface in both the EP and the other end portion EF can be reduced in a well-balanced manner, and the reliability of the switch can be improved to prolong the life.

(2) As the switch in Embodiment 2 is shown by FIG. 5, the following structure is applied in the structure of said (1) term.
The slit 8 extends in the longitudinal direction of the pair of plate-like pieces in a state in which the other end portion EF of the blade 12 is joined to the second fixed contact 11b.
With this configuration, the slits 8 for establishing the multipoint contact relationship can be appropriately disposed in accordance with the shape of the blade 12, and an accurate configuration can be secured.

(3) As the switch in Embodiment 2 is shown by FIG. 5, the following structure is applied in the structure of said (1) term or said (2) term.
The first and second fixed contacts 11a and 11b provided with the slits 8 are characterized in that they are formed symmetrically with each other.
With this configuration, the contact pressure load on each conductive contact surface at both the one end EP and the other end EF of the blade 12 to be pivoted is further reduced in a balanced manner, and the reliability of the switch is improved. It is possible to extend the life.

(4) In the switch according to the second embodiment, the following configuration is applied to any one of the configurations (1) to (3).
The edge of each of the conductive contact surfaces provided with the slits 8 is provided with a chamfered portion having an arc-shaped curved surface on which so-called R processing is performed.
This configuration makes it possible to reduce the amount of mechanical wear due to the sliding of the conductive contact surfaces of the blade 12 and the fixed contacts 11a and 11b in multipoint contact, thereby achieving high reliability and long life.

Third Embodiment
The third embodiment will be described with reference to FIG. FIG. 6 is a structural view showing the configuration of the switch according to the third embodiment, FIG. 6 (a) is a front view of the switch, and FIG. 6 (b) is a structural view showing the internal configuration with the connection adapter 10 removed. .

The differences from Embodiment 1 in which the switch blade shown in FIG. 1 and FIG. 2 in the configuration according to this Embodiment 3 is included are as follows. In FIGS. 1 and 2, the operation link 7 connected to the connection pin 6 attached to the center hole of the blade 2 is connected to the operation device, and the drive portion of the operation device performs linear motion to open the switch blade In the third embodiment, the blade 16 is attached to the connection adapter 10 directly connected to the operation mechanism, and the drive portion of the operation mechanism rotates in an axial manner. It becomes possible to drive 16 in an arc shape. One end EP of the blade 16 is pivotally connected to the fixed contact 17a and the other end EF which is a free end is pivotally operated by the connection adapter 10 directly connected to the operation mechanism.
In the closed circuit state shown in FIG. 6 (a), the contact pressure is applied to the fixed contact 17a to connect one end EP of the blade 16 to be connected, and the open circuit command is given to the operating device to make the blade 16 counterclockwise. By being rotated, the other end EF of the blade 16 is in contact with the fixed contact 17c for grounding and connected to be in a grounded state.

Further, the blade 16 has a rectangular shape, and the slit 8 and the chamfered portion 9 by so-called R processing are provided around the slit 8 as in the first embodiment, and the fixed contacts 17a, 17b and 17c also have a rectangular shape. By doing this, the conductive contact area can be increased, and the amount of mechanical wear due to the sliding of the conductive contact surface can be reduced.

The connection adapter 10 is directly connected to the operation mechanism, and reduces the number of rotations of the rotation drive shaft provided in the drive portion of the operation mechanism to mechanically convert it into a rotational movement at a predetermined operation angle. The rotary input is coupled to the rotary drive shaft of the operating mechanism and the output is coupled to the blade 16.

As the switch in Embodiment 3 is shown in FIG. 6, the following configuration is applied to the configuration in Embodiment 1 or 2 described above.
The operating device operates the blade 16 by the rotation of a rotation drive shaft, the connection adapter 10 is directly connected to the rotation drive shaft, and the blade 16 is the connection adapter according to the rotation of the rotation drive shaft. This configuration is characterized in that the switch 16 is operated to rotate via the switch 10. The switch having high reliability that can operate the blade 16 accurately by the connection adapter 10 directly connected to the operation mechanism can be obtained.

In the first, second, and third embodiments, an example in which one slit is provided for one contact is described, but the present invention is not limited to this. Two contacts may be provided for one contact. Three or more slits may be provided. In this case, the number of contact points of multipoint contact between the contacts can be increased.

While this disclosure describes various exemplary embodiments and examples, the various features, aspects, and features described in one or more embodiments are of particular embodiments. The invention is not limited to the application, and can be applied to the embodiment alone or in various combinations.
Accordingly, numerous modifications not illustrated are contemplated within the scope of the technology disclosed herein. For example, when deforming at least one component, adding or omitting it, it is further included that at least one component is extracted and combined with a component of another embodiment.

1a fixed contact, 1b fixed contact, 2 blades, 2a plate-like piece, 2b plate-like piece, 3a contact pressure spring, 3b contact pressure spring, 4a stepped pin, 4b stepped pin, 5 spacer, 6 connection Pins, 7 operation links, 8 slits, 9 chamfers, 10 connection adapters, 11a fixed contacts, 11b fixed contacts, 12 blades, 13 holes for stepped pins, 13a holes for stepped pins, 14 holes for 14 pins Stepped pin step, 16 blades, 17a fixed contact, 17b fixed contact, 17c fixed contact.

Claims (9)

1. A first fixed contact, a second fixed contact disposed at a predetermined distance from the first fixed contact, and an end of the first fixed contact pivotally connected to the first fixed contact The apparatus further comprises a blade connecting the other end to the second fixed contact by rotational operation by the device and bridging the first and second fixed contacts to electrically connect the one end of the blade The other end of the blade is in pressure contact with the second fixed contact in a state of being joined to the second fixed contact while being pressed into contact with the first fixed contact. Conductive contact surface to the first fixed contact at one end of the blade, conductive contact surface to the second fixed contact at the other end of the blade, or the blade at the first fixed contact Conductive contact surface to one end of the second fixed contact Switch, wherein wherein the conductive contact surface of the other end portion of the blade, that at least one slit dividing each of the conductive contact surface is provided in the.
2. The blade is formed by a pair of plate-shaped pieces extending in the longitudinal direction and facing each other, and the first fixed contact is pressed and held between one ends of the pair of plate-like pieces. The second fixed contact is press-contacted and held between the other ends of the pair of plate-like pieces in a state where the other end of the blade is joined to the second fixed contact. The switch according to claim 1.
3. The switch according to claim 2, wherein the slits extend in the longitudinal direction of the pair of plate-like pieces.
4. The switch according to claim 2 or 3, wherein the slits provided at one end and the other end of the pair of plate-like pieces are formed to be symmetrical to each other.
5. The switch according to claim 1, wherein the slits are provided in the first fixed contact and the second fixed contact.
6. The switch according to claim 5, wherein the slit extends in a longitudinal direction of the blade in a state where the other end of the blade is joined to the second fixed contact.
7. The switch according to claim 5 or 6, wherein the slits provided in the first and second fixed contacts are formed to be symmetrical to each other.
8. The switch according to any one of claims 1 to 7, wherein a chamfered portion is provided at an edge of each of the conductive contact surfaces provided with the slits.
9. The operating device operates the blade by rotation of a rotation drive shaft, a connection adapter is directly connected to the rotation drive shaft, and the blade is connected via the connection adapter according to rotation of the rotation drive shaft. The switch according to any one of claims 1 to 8, wherein the switch is operated to rotate.

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