JP7191144B2 - Airtight terminal and contact device using the airtight terminal - Google Patents

Description

The present invention relates to airtight terminals in general, including airtight terminals mounted in relay devices of high electric capacity, and to relay devices in general, including airtight terminals, including relay contact devices using the airtight terminals.

Automakers in Japan and overseas have put hybrid vehicles (hereinafter abbreviated as HEVs) into practical use as a countermeasure against environmental problems such as global warming. Furthermore, the development of electric vehicles (hereinafter abbreviated as EV) is also active. HEVs and EVs require a large motor output, and the mounted batteries also have a high capacity. Therefore, high-performance, high-capacity relays are indispensable for driving HEVs and EVs stably and efficiently. Automotive high-capacity relays are required to be small and lightweight in order to be installed in a limited space. In addition, in order to improve the current-carrying performance of the relay, it is necessary to suppress temperature rise during continuous current-carrying as much as possible while using a low-resistance metal for current-carrying parts. Furthermore, since it is an in-vehicle component, robustness and reliability that can withstand severe vibration and temperature loads are also required.

As such a relay, for example, there is an electromagnetic relay described in Patent Document 1. This electromagnetic relay has a first exciting coil, a mover, and a first stator. It has an electromagnet device for moving the element from the second position to the first position, a fixed contact and a movable contact, and the movable element moves to the first position by moving the movable contact along with the movement of the movable element. a contact device in which the movable contact is in a closed state in which the movable contact is in contact with the fixed contact at a certain time, and is in an open state in which the movable contact is separated from the fixed contact when the mover is in the second position and in the third position; It has a second excitation coil connected in series with the contact device, and when the mover is in the first position, the magnetic flux generated in the second excitation coil by an abnormal current exceeding a specified value flowing through the contact device causes the movable a trip device for moving the child to a third position, the contact device, the electromagnet device and the trip device being arranged side by side in one direction, the trip device being on the opposite side of the electromagnet device from the contact device. are placed.

Conventionally, the contact device that constitutes such a high-capacity relay for vehicle use has a space in which fixed and movable contacts are arranged in order to quickly extinguish the arc that occurs when the contact is turned off. , a contact device in which the space is filled with an arc-extinguishing gas (insulating gas) is used. For example, in the contact device disclosed in Patent Document 2, a housing, a connecting body, a plate, and a plunger cap are joined to form a space for accommodating fixed contacts and movable contacts. That is, the contact device has a space surrounded by a housing, a connecting body, a plate, and a plunger cap, and this space is sealed with an arc-extinguishing gas containing hydrogen as a main component.

Some contact devices are housed in a metal container having an airtight terminal as described in Patent Document 3, and the contact device is an electromagnetic relay that opens and closes the contact device by an electromagnet device. a pipe lead inserted through the through hole; insulating glass sealing the metal container and the pipe lead; a terminal block made of a low-resistance metal penetrating the pipe lead and fixed to the pipe lead; a fixed contact supported by the terminal block; a lid covering and sealing the periphery of the opening of the metal container; a movable contact supported by a shaft passing through the lid; Consists of contacts. The airtight terminal included in this contact device includes a metal container having a through hole, a pipe lead inserted through the through hole, insulating glass sealing the metal container and the pipe lead, and a pipe extending through the pipe lead. and a terminal block made of a low-resistance metal fixed to the lead.

JP 2015-046377 A JP 2015-049939 A JP 2017-069144 A JP 2014-017086 A

As shown in the terminal block (fixed terminal 33) of Patent Document 4, the terminal block of a conventional contact device has a helical hole at the top of the outer end of the terminal block for electrical connection with an external device. provided coaxially in the direction of This spiral hole is electrically connected to the external wiring by fastening it with a bolt. Therefore, there is a risk that the insulating glass will break when an external device is fastened or electrically connected to the terminal block.

An object of the present invention is to solve the above problems, and an airtight terminal that realizes a contact device with higher airtightness in a contact device used in a high-capacity relay (high-capacity electromagnetic relay). Another object of the present invention is to realize a contact device for a relay to which the airtight terminal is applied, and to improve the robustness of the insulating material caused by the conventional structure. At the same time, it is possible to solve the problem of hermetic reliability.

According to the present invention, a metal container having a through hole, a pipe lead inserted through the through hole, an insulating material sealing the metal container and the pipe lead, and a pipe lead passing through and fixed to the pipe lead a terminal block made of low resistance metal, the terminal block comprising at least a body and a head, the head further having a fixing part, the axis of the fixing part being coaxial with the axis of the body A hermetic terminal for a relay is provided, characterized in that it is not arranged. For example, the fixing part has a through hole or the like on the side of the shaft of the head, which is at least a part of the outer part of the rod-shaped body of the terminal block (the part of the terminal block arranged outside the metal container). A non-through hole or projection is provided to be used as a fixing portion. Alternatively, at least a part of the outer portion of the rod-shaped body of the terminal block (the portion of the terminal block placed outside the metal container) is extended to form a head, and a through hole, a non-through hole, or a projection is formed on the side surface of the head. If this is used as a fixing part, since the fixing part is not arranged coaxially with the axis of the rod-shaped body, the axial direction of the terminal block and the rotation axis of the helical fastening of the terminal block are arranged in different positions or directions. Thus, when the airtight terminal and the external device are fixed, the insulating material is not subjected to stress such as rotational torque of helical fastening.

Further, according to the present invention, there is provided a relay contact device using the above-described relay airtight terminal in an electromagnetic relay that opens and closes a contact device by an electromagnet device. That is, in an electromagnetic relay that opens and closes a contact device by an electromagnet device, a metal container having a through hole, a pipe lead inserted through the through hole, an insulating material sealing the metal container and the pipe lead, and a pipe lead. A terminal block made of a low-resistance metal penetrating and fixed to the pipe lead, a fixed contact supported by the terminal block, a lid covering and sealing the periphery of the opening of the metal container, and a shaft penetrating the lid. and a movable contact provided on the movable contact, the terminal block comprises at least a body and a head, the head further having a fixed part, and a fixed part A relay contact device is provided wherein the axis of the body is not coaxial with the axis of the body. For example, the fixing part has a through hole or the like on the side of the shaft of the head, which is at least a part of the outer part of the rod-shaped body of the terminal block (the part of the terminal block arranged outside the metal container). A non-through hole or projection is provided to be used as a fixing portion. Alternatively, at least a part of the outer portion of the rod-shaped body of the terminal block (the portion of the terminal block placed outside the metal container) is extended to form a head, and a through hole, a non-through hole, or a projection is formed on the side surface of the head. If this is used as a fixing part, the fixing part will not be arranged coaxially with the axis of the rod-shaped body, so that the axial direction of the terminal block and the rotation axis of the helical fastening of the terminal block are in different positions or directions. When the contact device and the external device are fixed, stress such as rotational torque of spiral fastening is not applied to the insulating material.

The fixing portion according to the present invention may have any shape and any fixing means as long as the airtight terminal and the contact device can be fixed to the electrode terminal portion of the external device. For example, it may be composed of any one or more of through holes, non-through holes, spiral holes or spiral holes, notches, projections, protrusions, etc. for helical fastening.

According to one embodiment of the present invention, the robustness of hermetic terminals and contact devices can be improved.

1 shows a relay airtight terminal 10 according to the present invention, (a) is a plan view, (b) is a front view and a partial cross-sectional view cut along the DD line of (a), and (c) is a bottom surface. FIG. 4(d) shows a projection view of the terminal block 15. FIG. Shown is a relay airtight terminal 20 according to the present invention, (a) is a plan view, (b) is a front view and a partial cross-sectional view cut along the DD line of (a), and (c) is a bottom surface. FIG. 4(d) shows a projection view of the terminal block 25. FIG. 1 shows a relay contact device 30 according to the invention, (a) is a front view in a closed state and a cross-sectional view excluding a left terminal block 35, and (b) is a front cross-sectional view in an open state. FIG. 3 is a front cross-sectional view showing a connection example of the relay contact device 30 according to the present invention; 1 shows a relay contact device 40 according to the present invention, in which (a) is a front view of a closed state and a cross-sectional view excluding a left terminal block 35 portion, and (b) is a front cross-sectional view of an open state. FIG. 3 is a front cross-sectional view showing a connection example of the relay contact device 40 according to the present invention;

Hereinafter, an airtight terminal for a relay of the present invention and a contact device for a relay using the airtight terminal will be described with reference to the drawings.

As shown in FIG. 1, a relay airtight terminal 10 according to the present invention comprises a metal container 12 made of iron or an iron-based alloy having a through hole 11 and a pipe made of iron or an iron-based alloy inserted through the through hole 11. A lead 13, an insulating material 14 made of glass or epoxy resin that seals the metal container 12 and the pipe lead 13, and copper, aluminum, a copper-based alloy, or an aluminum-based alloy that penetrates the pipe lead 13 and adheres to the pipe lead 13. The terminal block 15 comprises at least a body portion 16 and a head portion 17. The head portion 17 further has a fixed portion 18, and the central axis of the fixed portion 18 is , is not arranged coaxially with the central axis of the body portion 16 . The fixing portion 18 is provided on the outer side surface of the head portion 17 of the terminal block 15 (the side portion of the terminal block 15 arranged outside the metal container 12) so as to be perpendicular to the axis of the body portion 16. 15 is attached to the pipe lead 13 . When fixing an external device to the airtight terminal 10, the fixing portion 18 can be used to fasten the external device. are perpendicular to each other, the insulating material 14 is not subjected to stress such as rotational torque of spiral fastening when the airtight terminal 10 and an external device are fixed.

In the example of FIG. 1, the inner diameter central axis of the fixing portion 18 is perpendicular to the axis of the rod-shaped body portion 16, but the axis of the fixing portion 18 is at least coaxial with the center of the axis of the rod-shaped body portion 16. It's enough if you don't. If the fixed portion 18 has a hole shape, the central axis of its diameter should not be coaxial with the central axis of the trunk portion 16 . Therefore, the fixing part 18 according to the present invention can be arranged so that the center of the axis constituting the fixing part 18 is different from the axis of the trunk part 16 or the direction of the axis is different. may be in the form

For example, a relay airtight terminal 20 according to the present invention shown in FIG. an insulating material 24 made of glass or epoxy resin that seals the metal container 22 and the pipe lead 23; A terminal block 25 made of a low-resistance metal, the terminal block 25 having at least a body portion 26 and a head portion 27, the head portion 27 further having a fixed portion 28, and the central axis of the fixed portion 28 is It is characterized in that it is not arranged coaxially with the central axis of the trunk portion 26 . The fixing portion 28 is provided on the side surface of the head portion 27 provided by extending the outer side of the trunk portion 26 of the terminal block 25 (the portion of the terminal block 25 arranged outside the metal container 22). A base 25 is attached with a pipe lead 23 . When fixing the airtight terminal 20 to an external device, the extended head portion 27 can be bent into a desired shape and attached. It can be fixed to the external device 700 at a position spaced apart from the axis of the barrel 26 as shown. As a result, the insulating material 24 is not subjected to stress such as rotational torque for spiral fastening.

A relay contact device 30 according to the present invention, as shown in FIG. , a metal container 32 made of iron or an iron-based alloy provided with a through hole 31, a pipe lead 33 made of iron or an iron-based alloy inserted through the through hole 31, and the pipe lead 33 and the metal container 32 are sealed. An insulating material 34 made of glass or epoxy resin, a terminal block 35 made of a low-resistance metal such as copper, aluminum, a copper-based alloy, or an aluminum-based alloy penetrating through the pipe lead 33 and fixed to the pipe lead 33, and the terminal block 35 A supported fixed contact 310, a cover 320 made of iron or an iron-based alloy that covers and seals the periphery of the opening of the metal container 32, a movable contact 340 that is supported by a shaft 330 passing through the cover 320, Equipped with a movable contact 350 provided on a movable contactor 340, the terminal block 35 is composed of at least a body portion 36 and a head portion 37, and the head portion 37 further has a fixed portion 38 on its side surface. The axis is characterized in that it is not arranged coaxially with the central axis of barrel 36 . The fixing portion 38 is provided on the outer side surface of the head portion 37 of the terminal block 35 (the side portion of the terminal block 35 arranged outside the metal container 32) so as to be perpendicular to the axis of the body portion 36. 35 is attached with the pipe lead 33 . As shown in FIG. 4 , when fixing the external device 700 to the contact device 30 , the fixing portion 38 is arranged so as to be fixed to the external device 700 using the bus bar 360 . As a result, the central axis of the body portion 36 and the central axis of the fixing portion 38 are perpendicular to each other, so that the axial direction of the terminal block 35 and the fixing axis of the terminal block 35 are arranged in different directions. As a result, when the contact device 30 and the external device 700 are fixed, stress such as rotational torque of spiral fastening is not applied to the insulating material 34 .

A relay contact device 40 according to the present invention is a relay contact device utilizing the above-described relay airtight terminal 20 as shown in FIG. That is, in an electromagnetic relay that opens and closes a contact device by an electromagnet device 400, at least a metal container 42 made of iron or an iron alloy having a through hole 41 and a pipe lead 43 made of iron or an iron alloy inserted through the through hole 41 is used. an insulating material 44 made of glass or epoxy resin for sealing the pipe lead 43 and the metal container 42; a terminal block 45 made of a low-resistance metal, a fixed contact 410 supported by the terminal block 45, a lid 420 made of iron or an iron-based alloy that covers and seals the periphery of the opening of the metal container 42, and a lid 420 A movable contact 440 supported by a shaft 430 passing through and a movable contact 450 provided on the movable contact 440. A terminal block 45 has at least a body portion 46 and a head portion 47, and further includes a head portion 46 and a head portion 47. 47 has a fixing portion 48 on its side surface, and the central axis of the fixing portion 48 is not arranged coaxially with the central axis of the trunk portion 46 . The fixing portion 48 is provided on a head portion 47 which is provided by extending the outer side of the trunk portion 46 of the terminal block 45 (the portion of the terminal block 45 arranged outside the metal container 42). A terminal block 45 is attached to the pipe lead 43 . As shown in FIG. 6, the head portion 47 can be bent at a desired angle, and has a fixing portion 48 near its outer end. When the contact device 40 and the external device 700 are fixed, the fixing portion 48 is used so as to be fixed to the external device 700 at a position separated from the axis of the body portion 46 . As a result, when the external device 700 is fixed to the contact device 40 , the insulating material 44 is not subjected to stress such as rotational torque of helical fastening.

The fixing portion according to the present invention may have any shape and any fixing means as long as the airtight terminal and the contact device can be fixed to the electrode terminal portion of the external device. For example, it may be composed of any one or more of a through hole for helical fastening, a non-through hole, a helical hole, a helical hole, a notch, a protrusion, a convex portion, and the like.

In the relay contact device according to the present invention, the inner wall surface of the metal container and the lid may be provided with a heat-resistant insulating material or provided with a heat-resistant insulating material lining for the purpose of enhancing heat resistance and insulation, if necessary. good.

As shown in FIG. 1, a relay airtight terminal 10 of Embodiment 1 according to the present invention includes an iron metal container 12 having a through hole 11 and a pipe lead 13 made of an Fe—Ni alloy inserted through the through hole 11. , an insulating material 14 made of soda barium glass for airtightly sealing the metal container 12 and the pipe lead 13, and a terminal block 15 made of a copper alloy penetrating the pipe lead 13 and airtightly fixed to the pipe lead 13. The terminal block 15 is composed of a cylindrical body portion 16 and a flat head portion 17. The head portion 17 further has a fixing portion 18 formed of a through hole. It is characterized in that it is not arranged coaxially with the outer diameter center axis of the portion 16 . The through-hole constituting the fixing portion 18 is provided on the outer side surface of the head portion 17 of the terminal block 15 so as to be orthogonal to the axis of the rod-shaped body portion 16, and the terminal block 15 has a through-hole in the cylindrical bottom portion. It is airtightly attached using brazing material in a state where it is inserted into a pipe lead 13 having a similar shape. When fixing the airtight terminal 10 and an external device, the through-holes are used so that they can be fastened to the external device. As a result, the fixing portion 18 is arranged so that the central axis of the rod-shaped body portion 16 and the central axis of the through hole are perpendicular to each other, so that the axial direction of the terminal block 15 and the rotation axis of the spiral connection of the terminal block 15 are different. , so that the rotational torque of the spiral fastening is not applied to the insulating material 14 when the airtight terminal 10 and the external device are fixed. The flat head 27 has the advantage of reducing the contact resistance of electrical connections.

As shown in FIG. 2, a relay airtight terminal 20 of Embodiment 2 according to the present invention includes a stainless steel metal container 22 having a through hole 21 and a pipe lead made of an Fe—Ni alloy inserted through the through hole 21. 23, an insulating material 24 made of soda barium glass that airtightly seals the metal container 22 and the pipe lead 23, and a terminal block 25 made of copper that penetrates the pipe lead 23 and is airtightly fixed to the pipe lead 23, The terminal block 25 has a cylindrical body portion 26 and a head portion 27 extending in a flat plate shape. It is characterized in that it is not arranged coaxially with the axis of the rod-shaped trunk portion 26 . A through-hole constituting the fixing portion 28 is provided through a head portion 27 formed in a flat plate by extending the outer side of the rod-shaped body portion 26 of the terminal block 25. The terminal block 25 has a cylindrical bottom portion. It is airtightly attached using brazing material in a state in which it is inserted into a pipe lead 23 having a shape provided with a through hole. The outer-side head portion 27 extending into a plate shape can be bent at a desired angle, and a fixing portion 28 is provided on the side surface near the outer end thereof. When the airtight terminal 20 and the external device are fixed, the fixing portion 28 is used so that it can be fastened to the external device 700 at a position separated from the axis of the rod-shaped body portion 26, and the rotational torque of the spiral fastening is applied. does not hang on the insulating material 24. The extended flat head 37 has the effect of reducing the contact resistance of electrical connection, facilitating bending in a desired direction, and preventing bending in a direction other than the desired direction. Also, the bus bar can be omitted, which contributes to a reduction in the number of parts and the number of assembly man-hours.

As shown in FIG. 3, a relay contact device 30 according to a third embodiment of the present invention is an electromagnetic relay that opens and closes a contact device by means of an electromagnet device 300. A stainless steel metal container 32 provided with a through hole 31 and a A pipe lead 33 made of Fe—Ni alloy inserted through the hole 31, an insulating material 34 made of soda barium glass for airtightly sealing the pipe lead 33 and the metal container 32, and a pipe lead 33 penetrating and airtightly attached to the pipe lead 33. a terminal block 35 made of a copper alloy adhered to the terminal block 35; a fixed contact 310 supported by the terminal block 35; and a movable contact 350 provided on the movable contact 340. The terminal block 35 has a cylindrical shape and a flat head portion 37. The head portion 37 has a fixing portion 38 formed of a through hole. It is characterized in that they are not arranged coaxially. The through-hole constituting the fixing portion 38 is provided on the outer side surface of the head portion 37 of the terminal block 35 so as to be perpendicular to the axis of the rod-shaped body portion 36, and the terminal block 35 has a through-hole in the cylindrical bottom portion. It is airtightly attached to a pipe lead 33 having a shape with brazing material. As shown in FIG. 4 , when the external device 700 is fixed to the contact device 30 , the electrode section 710 of the external device 700 and the electrode section 710 of the external device 700 are fastened by the spiral 370 via the bus bar 360 which is fastened and fixed to the fixing portion 38 by the spiral 370 . placed so that it is possible. As a result, the central axis of the body portion 36 and the central axis of the fixed portion 38 are perpendicular to each other, so that the axial direction of the terminal block 35 and the rotation axis of the spiral connection of the terminal block 35 are arranged in different directions. As a result, the rotational torque of the helical fastening is not applied to the insulating material 34 .

As shown in FIG. 5, a relay contact device 40 according to a fourth embodiment of the present invention is an electromagnetic relay that opens and closes a contact device by means of an electromagnet device 400. An iron metal container 42 provided with a through hole 41 and a through hole A pipe lead 43 made of an Fe—Ni alloy inserted through the pipe 41, an insulating material 44 made of soda barium glass for hermetically sealing the pipe lead 43 and the metal container 42, and an insulating material 44 of soda barium glass that hermetically seals the pipe lead 43 and the metal container 42. A terminal block 45 made of fixed copper, a fixed contact 410 supported by the terminal block 45, a lid 420 made of Fe—Ni alloy that covers and seals the periphery of the opening of the metal container 42, and the lid 420 is penetrated. The terminal block 45 is provided with a movable contact 440 supported by a shaft 430 attached so as to exert an elastic force of a spring, and a movable contact 450 provided on the movable contact 440. The terminal block 45 has a cylindrical body. It has a portion 46 and a flat plate-shaped head portion 47, and the head portion 47 has a fixing portion 48 formed of a through hole. characterized by A through-hole constituting the fixing portion 48 is provided through a plate-shaped head portion 47 provided by extending the outer side of the rod-shaped body portion 46 of the terminal block 45 in a plate shape, and the terminal block 45 is It is airtightly attached to a pipe lead 43 having a tubular bottom with a through hole using brazing material. An outer head portion 47 extending into a plate shape can be bent at a desired angle, and a fixing portion 48 is provided on a side surface near the outer end portion. As shown in FIG. 6, when fixing the contact device 40 and the external device 700, by bending the head portion 47, the fixed portion 38 and the electrode portion 710 of the external device 700 are spirally 470 even without a bus bar. It becomes possible to directly fasten and fix. The fixing part 48 is arranged so that it can be fixed to the external device 700 at a position separated from the axis of the rod-shaped body part 46 , so that the rotational torque of spiral fastening is not applied to the insulating material 44 .

The fixing part of each of the above-described embodiments can be modified so that it can be connected to the external device 700 by providing a protrusion on the side surface of the head instead of the through hole.

INDUSTRIAL APPLICABILITY The present invention can be used for airtight terminals in general, including airtight terminals mounted in vehicle-mounted system main relay devices such as HEVs and EVs, and relay devices in general, including system main relays mounted in HEVs, EVs, and the like.

Airtight terminal 10, through hole 11, metal container 12, pipe lead 13, insulating material 14, terminal block 15, body 16, head 17, fixed part 18, airtight terminal 20, through hole 21, metal container 22, pipe lead 23, insulating material 24, terminal block 25, body 26, head 27, fixed part 28, contact device 30, through hole 31, metal container 32, pipe lead 33, insulating material 34, terminal block 35, body 36, head 37, fixed part 38, electromagnet device 300, fixed contact 310, lid 320, shaft 330, movable contact 340, movable contact 350, bus bar 360, spiral 370, contact device 40, through hole 41, metal container 42, Pipe lead 43, insulating material 44, terminal block 45, body 46, head 47, fixed part 48, electromagnet device 400, fixed contact 410, lid 420, shaft 430, movable contact 440, movable contact 450, spiral 470 , an external device 700 and an electrode section 710 .

Claims (24)

A metal container having a through hole, a pipe lead inserted through the through hole, an insulating material sealing the metal container and the pipe lead, and a low resistance metal passing through the pipe lead and fixed to the pipe lead. The terminal block comprises at least a body portion and a head portion, and the head portion has a fixing portion, and the fixing portion comprises a through hole for helical fastening. is not arranged coaxially with the axis of the body. 2. The hermetic terminal according to claim 1, wherein said terminal block is made of a low resistance metal. 3. The airtight terminal according to claim 1, wherein the terminal block is made of copper, aluminum, a copper-based alloy, or an aluminum-based alloy. 4. The airtight terminal according to claim 1, wherein said insulating material is made of glass or epoxy resin. 5. The airtight terminal according to claim 1, wherein the head is provided on the outer side of the terminal block. 6. The airtight terminal according to claim 1, wherein the head is formed by extending a terminal block. 7. The airtight terminal according to any one of claims 1 to 6, wherein said head is provided in a flat plate shape. 8. The airtight terminal according to claim 1, wherein said head is bent at a desired angle. 9. The fixing part according to any one of claims 1 to 8, wherein the fixing part is composed of one or more of a through hole, a non-through hole, a spiral hole or a spiral hole, a notch, a projection, and a convex portion. airtight terminal. 10. The airtight terminal according to any one of claims 1 to 9, wherein a central axis of said fixing portion is provided so as to be orthogonal to a central axis of said body portion. 10. The airtight terminal according to any one of claims 1 to 9, wherein a central axis of said body portion and a central axis of said fixing portion are arranged in different directions. 10. The airtight terminal according to any one of claims 1 to 9, wherein the fixing portion is arranged so as to be fixed to an external device at a position separated from the central axis of the body portion. An electromagnetic relay that opens and closes a contact device by an electromagnet device, comprising at least a metal container having a through hole, a pipe lead inserted through the through hole, an insulating material sealing the pipe lead and the metal container, and A terminal block that penetrates a pipe lead and is fixed to the pipe lead, a fixed contact supported by the terminal block, a lid that covers and seals the periphery of the opening of the metal container, and a shaft that penetrates the lid. The terminal block comprises at least a body portion and a head portion, and the head portion has a fixed portion. (1) is a contact device comprising a through hole for helical fastening, wherein the axis of the fixing portion is not arranged coaxially with the axis of the body portion. 14. The contact device according to claim 13, wherein said terminal block is made of low resistance metal. 15. The contact device according to claim 13, wherein the terminal block is made of copper, aluminum, a copper-based alloy, or an aluminum-based alloy. 16. The contact device according to claim 13, wherein said insulating material is made of glass or epoxy resin. The contact device according to any one of claims 13 to 16, wherein the head is provided on the outer side of the terminal block. 18. The contact device according to any one of claims 13 to 17, wherein the head is formed by extending a terminal block. 19. The contact device according to any one of claims 13 to 18, wherein said head is provided in a flat plate shape. 20. The contact device according to claim 13, wherein said head is bent at a desired angle. 21. The fixing part according to any one of claims 13 to 20, wherein the fixing part is composed of one or more of a through hole, a non-through hole, a spiral hole or a spiral hole, a notch, a protrusion, and a convex portion. contact device. 22. The contact device according to any one of claims 13 to 21, wherein the central axis of said fixed portion is provided so as to be orthogonal to the central axis of said body portion. 23. The contact device according to any one of claims 13 to 22, wherein the central axis of said body portion and the central axis of said fixing portion are arranged in different directions. 24. The contact device according to any one of claims 13 to 23, wherein the fixing portion is arranged so as to be fixed to an external device at a position separated from the central axis of the body portion.

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