Hermetic terminal and contact device using the same

Abstract

This invention provides a hermetically sealed terminal for achieving higher hermetically tightness in contact devices for high-capacitance relays, and a relay contact device using the hermetically sealed terminal, while improving the robustness of existing sealing configurations. Furthermore, it simultaneously solves problems related to hermetically tight reliability. This invention provides a hermetically sealed terminal for relays and a relay contact device utilizing the same. The hermetically sealed terminal comprises: a metal container with a through-hole, a tube guide inserted through the through-hole, an insulating material encapsulating the metal container and the tube guide, and a terminal block made of low-resistance metal penetrating the tube guide and fixed to it. The terminal block consists of at least a body and a head, and the head has a fixing portion whose axis is not coaxial with the axis of the body.

Description

Technical Field

[0001] This invention relates to all hermetic terminals, including hermetic terminals mounted on high-capacitance relay devices, and all relay devices having hermetic terminals, including relay contact devices using hermetic terminals. Background Technology

[0002] As a response to environmental issues such as global warming, domestic and international automakers have put hybrid electric vehicles (HEVs) into practical use, and this technology is now being extended to large vehicles and RVs. Consequently, the development of electric vehicles (EVs) is also becoming increasingly active. HEVs and EVs require large motor outputs and high-capacity batteries. Therefore, high-performance, high-capacity relays are indispensable for the stable and efficient operation of HEVs and EVs. High-capacity relays used in vehicles are installed in limited space, thus requiring small size and lightweight design. Furthermore, to improve the relay's energizing performance, low-resistance metals must be used in the energizing parts, while also minimizing temperature rise during continuous energization. Moreover, as an on-board component, it also needs to withstand excessive vibration and temperature loads, ensuring robustness and reliability.

[0003] For example, there is an electromagnetic relay described in Patent Document 1. This electromagnetic relay includes: an electromagnet device having a first excitation coil, a mover, and a first stator, which attracts the mover to the first stator by magnetic flux generated when the first excitation coil is energized, and moves the mover from a second position to a first position; a contact device having a fixed contact and a movable contact, the movable contact moving with the mover, such that when the mover is in the first position, the movable contact is in a closed state with the fixed contact in contact, and when the mover is in the second and third positions, the movable contact is in an open state with the fixed contact separated from the movable contact; and a tripping device having a second excitation coil connected in series with the contact device, which moves the mover to a third position by magnetic flux generated in the second excitation coil based on an abnormal current flowing through the contact device at a predetermined value when the mover is in the first position. The contact device, the electromagnet device, and the tripping device are arranged in one direction, and the tripping device is arranged on the opposite side of the contact device relative to the electromagnet device.

[0004] In the contact device of such a high-capacitance relay for vehicle use, conventionally, in order to quickly extinguish the arc generated when the contacts are disconnected, a contact device is used that constitutes a space for arranging fixed contacts and movable contacts, and fills the space with an arc-extinguishing gas (insulating gas). For example, the contact device described in Patent Document 2 joins a housing, a connecting body, a plate, and a plunger cap to form a space that accommodates fixed contacts and movable contacts. That is, the contact device provides a space enclosed by the housing, connecting body, plate, and plunger cap, and seals the space with an arc-extinguishing gas mainly composed of hydrogen.

[0005] The contact device includes a contact device housed in a metal container with an airtight terminal as described in Patent Document 3. This contact device is used by an electromagnetic relay for opening and closing the contact device via an electromagnet, and comprises the following parts: a metal container with a through-hole, a pipe lead inserted through the through-hole, an insulating glass encapsulating the metal container and the pipe lead, a terminal block made of low-resistance metal passing through and fixed to the pipe lead, a fixed contact supported by the terminal block, a cover covering and sealing the periphery of the opening of the metal container, a movable contact supported by a shaft passing through the cover, and a movable contact provided on the movable contact. The airtight terminal included in this contact device comprises: a metal container with a through-hole, a pipe lead inserted through the through-hole, an insulating glass encapsulating the metal container and the pipe lead, and a terminal block made of low-resistance metal passing through and fixed to the pipe lead.

[0006] (Prior technical documents)

[0007] (Patent Documents)

[0008] Patent Document 1: JP Japanese Patent Application Publication No. 2015-046377;

[0009] Patent Document 2: JP Japanese Patent Application Publication No. 2015-049939;

[0010] Patent document 3: JP Japanese Patent Application Publication No. 2017-069144;

[0011] Patent document 4: JP 2014-017086. Summary of the Invention

[0012] (The problem the invention aims to solve)

[0013] In existing contact device terminal blocks, such as the terminal block (fixed terminal 33) in Patent Document 4, a spiral hole for electrical connection with an external device is provided coaxially with the axial direction of the terminal block at the outer end of the terminal block. External wiring is fastened with bolts and electrically connected to this spiral hole. However, the spiral hole is coaxially configured with the sealing hole of the insulating glass of the hermetic terminal, and the rotational torque of the spiral fixing acts directly on the glass sealing portion. Therefore, the insulating glass may break when the external device is fastened and electrically connected to the terminal block.

[0014] This invention addresses the aforementioned problems by providing a hermetically sealed terminal for a contact device in a high-capacitance relay (high-capacitance electromagnetic relay), achieving higher hermetically tightness, and a relay contact device using this hermetically sealed terminal, while also improving the robustness of existing insulating materials. Furthermore, it simultaneously solves problems related to hermetically tight reliability.

[0015] (Technical solution used to solve the problem)

[0016] According to the present invention, a hermetically sealed terminal for a relay is provided, characterized in that it comprises: a metal container having a through hole, a tube guide inserted through the through hole, an insulating material for encapsulating the metal container and the tube guide, and a terminal block made of low-resistance metal that passes through and is fixed to the tube guide. The terminal block is composed of at least a body and a head, and the head has a fixing portion whose axis is not coaxial with the axis of the body. For example, the fixing portion is formed as follows: at least a portion of the outer side of the rod-shaped body of the terminal block (the portion of the terminal block disposed outside the metal container) is provided as the head, and a through hole, a non-through hole, or a protrusion is provided on the side of the axis of the head to serve as the fixing portion. Alternatively, if at least a portion of the outer side of the rod-shaped body of the terminal block (the portion of the terminal block disposed on the outside of the metal container) is extended to form a head, and a through hole, non-through hole, or protrusion is provided on its side to form a fixing part, then the fixing part is not coaxially arranged with the axis of the rod-shaped body. Therefore, the axial direction of the terminal block and the rotation axis of the terminal block's screw fastening are arranged in different positions or directions. When the airtight terminal is fixed to the external device, the stress of the rotation torque of the screw fastening will not be applied to the insulating material.

[0017] Furthermore, according to the present invention, a contact device for a relay is provided, which is used in an electromagnetic relay in which the contact device is opened and closed by an electromagnet, and uses the hermetically sealed terminal for the relay. Specifically, a contact device for a relay is provided, which, in an electromagnetic relay in which the contact device is opened and closed by an electromagnet, includes at least: a metal container having a through hole, a tube guide inserted through the through hole, an insulating material encapsulating the metal container and the tube guide, a terminal block made of low-resistance metal passing through and fixed to the tube guide, a fixed contact supported by the terminal block, a cover covering and sealing the periphery of the opening of the metal container, a movable contact supported by a shaft passing through the cover, and a movable contact provided on the movable contact. The terminal block is composed of at least a body and a head, and the head has a fixing portion whose shaft is not coaxial with the shaft of the body. For example, the aforementioned fixing part can be formed as follows: at least a portion of the outer side of the rod-shaped body of the terminal block (the portion of the terminal block disposed on the outside of the metal container) is designated as a head, and a through hole, non-through hole, or protrusion is provided on the side of the shaft of the head, thereby making it a fixing part. Alternatively, if at least a portion of the outer side of the rod-shaped body of the terminal block (the portion of the terminal block disposed on the outside of the metal container) is extended to be designated as a head, and a through hole, non-through hole, or protrusion is provided on its side to make it a fixing part, then the fixing part is not coaxially arranged with the shaft of the rod-shaped body. Therefore, the axial direction of the terminal block and the rotation axis of the terminal block's screw fastening are arranged in different positions or directions. When the contact device is fixed to an external device, the stress of the rotational torque of the screw fastening will not be applied to the insulating material.

[0018] The fixing part involved in this invention only needs to be able to fix the airtight terminal and the contact device to the electrode terminal part of the external device, and any shape and fixing means can be used. For example, it can be constructed using any one or more of the following: through hole, non-through hole, spiral hole or spiral hole, notch, protrusion, convex part, etc., for spiral fastening.

[0019] (Invention Effects)

[0020] According to one embodiment of the present invention, the robustness of airtight terminals and contact devices can be improved. Attached Figure Description

[0021] Figure 1 The following diagram shows the airtight terminal 10 for a relay according to the present invention: (a) top view, (b) front view and partial sectional view cut off along line DD of (a), (c) bottom view, and (d) projection view of terminal block 15.

[0022] Figure 2The following diagram shows the airtight terminal 20 for a relay according to the present invention: (a) top view, (b) front view and partial sectional view cut along line DD of (a), (c) bottom view, and (d) projection view of terminal block 25.

[0023] Figure 3 The present invention relates to a relay contact device 30, (a) showing a front view of the closed state, i.e., a cross-sectional view excluding the left terminal block 35, and (b) showing a front cross-sectional view of the open state.

[0024] Figure 4 This is a front sectional view showing a connection example of the relay contact device 30 according to the present invention.

[0025] Figure 5 The present invention relates to a relay contact device 40, (a) showing a front view of the closed state, i.e., a cross-sectional view after removing the portion of the left terminal block 35, and (b) showing a front cross-sectional view of the open state.

[0026] Figure 6 This is a front sectional view showing a connection example of the relay contact device 40 according to the present invention. Detailed Implementation

[0027] Hereinafter, the airtight terminal for a relay and the contact device for a relay using the airtight terminal of the present invention will be described with reference to the accompanying drawings.

[0028] The hermetic terminal 10 for relays involved in this invention is as follows: Figure 1 As shown, the device comprises: a metal container 12 made of iron or an iron-based alloy with a through hole 11; a tube guide 13 made of iron or an iron-based alloy inserted through the through hole 11; an insulating material 14 made of glass or epoxy resin encapsulating the metal container 12 and the tube guide 13; and a terminal block 15 made of a low-resistance metal such as copper, aluminum, or copper-based alloys or aluminum-based alloys that passes through and is fixed to the tube guide 13. The terminal block 15 consists of at least a body 16 and a head 17. Furthermore, the head 17 has a fixing portion 18, the central axis of which is not coaxial with the central axis of the body 16. The fixing portion 18 is orthogonally disposed on the outer side of the head 17 of the terminal block 15 (the side portion of the terminal block 15 disposed outside the metal container 12) and the axis of the body 16. The terminal block 15 is mounted on the tube guide 13. When fixing the external device to the airtight terminal 10, the fixing part 18 can be used to fasten the external device. The fixing part 18 is installed in such a way that the central axis of the body 16 is orthogonal to the central axis of the fixing part 18. Therefore, when fixing the airtight terminal 10 to the external device, stress such as the rotational torque of the screw fastening will not be applied to the insulating material 14.

[0029] Despite Figure 1 In the example, the inner diameter center axis of the fixing part 18 is orthogonal to the axis of the rod-shaped torso 16, but it is sufficient that the axis of the fixing part 18 is not coaxial with the center of the axis of the rod-shaped torso 16. When the fixing part 18 is hole-shaped, the center axis of its opening does not need to be coaxial with the center axis of the torso 16; when it is protruding or convex, the center axis of the protrusion does not need to be coaxial with the center axis of the torso 16. Therefore, the fixing part 18 according to the present invention can be in any form as long as the center of the axis constituting the fixing part 18 is located at a different position from the axis of the torso 16, or arranged in a different direction.

[0030] For example, Figure 2 The hermetic terminal 20 for relays shown in this invention comprises: a metal container 22 made of iron or an iron-based alloy having a through hole 21; a tube guide 23 made of iron or an iron-based alloy inserted through the through hole 21; an insulating material 24 made of glass or epoxy resin encapsulating the metal container 22 and the tube guide 23; and a terminal block 25 made of a low-resistance metal such as copper, aluminum, or copper-based alloys or aluminum-based alloys that passes through and is fixed to the tube guide 23. The terminal block 25 has at least a body 26 and a head 27. Furthermore, the head 27 has a fixing portion 28, the central axis of which is not coaxial with the central axis of the body 26. The fixing portion 28 is provided on the side of the head 27, which extends from the outside of the body 26 of the terminal block 25 (the portion of the terminal block 25 disposed outside the metal container 22). The terminal block 25 is then mounted to the tube guide 23. When fixing the airtight terminal 20 to the external device, the extended head 27 can be bent into the required shape for installation, and the fixing part 28 provided on the side of the head 27 can be used to achieve the desired result. Figure 6 As shown, the external device 700 is fixed at a position axially separated from the body 26. Therefore, stresses such as the rotational torque of a screw fastener are not applied to the insulating material 24.

[0031] The relay contact device 30 involved in this invention is as follows: Figure 3The image shows a relay contact device using the aforementioned hermetically sealed terminal 10. In an electromagnetic relay where the contact device is opened and closed by an electromagnet device 300, the relay contact device 30 includes at least: a metal container 32 made of iron or an iron-based alloy with a through hole 31; a tube guide 33 made of iron or an iron-based alloy inserted into the through hole 31; an insulating material 34 made of glass or epoxy resin that encapsulates the tube guide 33 and the metal container 32; and a copper, aluminum, or... The terminal block 35 is made of a low-resistance metal such as a copper-based alloy or an aluminum-based alloy; a fixed contact 310 supported by the terminal block 35; a cover 320 made of iron or an iron-based alloy covering and sealing the periphery of the opening of the metal container 32; a movable contact 340 supported by a shaft 330 passing through the cover 320; and a movable contact 350 provided on the movable contact 340. The terminal block 35 is composed of at least a body 36 and a head 37. Furthermore, the head 37 has a fixing part 38 on its side, and the central axis of the fixing part 38 is not coaxial with the central axis of the body 36. The fixing part 38 is provided orthogonally to the axis of the body 36 on the outer side of the head 37 of the terminal block 35 (the side portion of the terminal block 35 located outside the metal container 32). The terminal block 35 is mounted on a pipe guide 33. Figure 4 As shown, when the external device 700 is fixed to the contact device 30, it is configured so that the external device 700 can be fixed to the fixing part 38 using the busbar 360. Therefore, the central axis of the body 36 is installed orthogonally to the central axis of the fixing part 38, and thus the axial direction of the terminal block 35 is arranged in a different direction from the fixing axis of the terminal block 35. Therefore, when fixing the contact device 30 and the external device 700, stresses such as the rotational torque of a screw fastener are not applied to the insulating material 34.

[0032] The relay contact device 40 involved in this invention is as follows: Figure 5The image shows a relay contact device utilizing the aforementioned hermetically sealed terminal 20. Specifically, in an electromagnetic relay where the electromagnet device 400 opens and closes the contact device, the relay contact device 40 includes at least: a metal container 42 made of iron or an iron alloy with a through hole 41; a tubular guide 43 made of iron or an iron-based alloy inserted into the through hole 41; an insulating material 44 made of glass or epoxy resin encapsulating the tubular guide 43 and the metal container 42; and a low-resistance metal such as copper, aluminum, or copper-based alloys or aluminum-based alloys that passes through and is fixed to the tubular guide 43. The terminal block 45 comprises a terminal block 45, a fixed contact 410 supported by the terminal block 45, a cover 420 made of iron or an iron-based alloy covering and sealing the periphery of the opening of the metal container 42, a movable contact 440 supported by a shaft 430 passing through the cover 420, and a movable contact 450 provided on the movable contact 440. The terminal block 45 has at least a body 46 and a head 47. Furthermore, the head 47 has a fixing portion 48 on its side, and the central axis of the fixing portion 48 is not coaxially arranged with the central axis of the body 46. The fixing portion 48 is provided on the head 47, which extends from the outside of the body 46 of the terminal block 45 (the portion of the terminal block 45 disposed outside the metal container 42). The terminal block 45 is mounted on a pipe guide 43. The head 47 is as follows: Figure 6 As shown, it can be bent to the desired angle, and a fixing part 48 is provided near its outer end. When fixing the contact device 40 and the external device 700, the fixing part 48 is fixed to the external device 700 at a position axially isolated from the body 46. As a result, when the external device 700 is fixed to the contact device 40, stresses such as the rotational torque of a screw fastener are not applied to the insulating material 44.

[0033] Regarding the fixing part involved in this invention, any shape and fixing means can be used as long as it can fix the airtight terminal and the contact device to the electrode terminal part of the external device. For example, it can be composed of any one or more of the following: through hole, non-through hole, spiral hole, spiral hole, groove, protrusion, convex part, etc., for spiral fastening.

[0034] The relay contact device of the present invention may, as needed, be equipped with heat-resistant insulating material or lined with heat-resistant insulating material on the inner wall surface of the metal container and the cover to enhance heat resistance and insulation.

[0035] Example

[0036] The hermetic terminal 10 for a relay according to Embodiment 1 of the present invention is as follows: Figure 1As shown, the device comprises: an iron metal container 12 with a through hole 11; a tube guide 13 made of Fe-Ni alloy inserted through the through hole 11; a sodium barium glass insulating material 14 for hermetically sealing the metal container 12 and the tube guide 13; and a terminal block 15 made of copper alloy that passes through and is hermetically fixed to the tube guide 13. The terminal block 15 consists of a cylindrical body 16 and a flat head 17. Furthermore, the head 17 has a fixing part 18 with a through hole, the inner diameter center axis of the fixing part 18 being not coaxial with the outer diameter center axis of the body 16. The through hole constituting the fixing part 18 is provided on the outer side of the head 17 of the terminal block 15 in a manner orthogonal to the axis of the rod-shaped body 16. The terminal block 15 is inserted into and passes through the tube guide 13, which has a through hole at the bottom of a cylindrical shape, and is hermetically installed using a wax material in this state. When fixing the hermetic terminal 10 to an external device, it is configured to be fastened to the external device using a through hole. Therefore, the fixing part 18 is configured such that the central axis of the rod-shaped body 16 is orthogonal to the central axis of the through hole. Thus, the axial direction of the terminal block 15 and the rotation axis of the screw fastening of the terminal block 15 are arranged in different directions, and the rotational torque of the screw fastening is not applied to the insulating material 14 when fixing the hermetic terminal 10 to the external device. The flat head 27 has the advantage of reducing the contact resistance of the electrical connection.

[0037] The hermetic terminal 20 for the relay in Embodiment 2 of the present invention is as follows: Figure 2As shown, the device includes: a stainless steel metal container 22 with a through hole 21; a tube guide 23 made of Fe-Ni alloy inserted through the through hole 21; a sodium barium glass insulating material 24 that hermetically seals the metal container 22 and the tube guide 23; and a copper terminal block 25 that passes through and is hermetically fixed to the tube guide 23. The terminal block 25 has a cylindrical body 26 and a flat head 27. The head 27 has a fixing portion 28 formed by the through hole, which is not coaxial with the axis of the rod-shaped body 26. The through hole constituting the fixing portion 28 is provided through the head 27, which is obtained by extending the rod-shaped body 26 of the terminal block 25 to the outside and setting it into a flat plate shape. The terminal block 25 is inserted into and passes through the tube guide 23, which has a through hole at the bottom of a cylindrical shape, and is hermetically installed using a wax material in this state. The outer head 27, extending in a plate shape, can be bent to the desired angle, and a fixing part 28 is provided on the side near its outer end. When fixing the airtight terminal 20 to the external device, it is configured so that the fixing part 28 can be used to fasten it to the external device 700 at a position isolated from the shaft of the rod-shaped body 26, and the rotational torque of the screw fastening will not be applied to the insulating material 24. In addition to reducing the contact resistance of the electrical connection, the extended plate-shaped head 37 also facilitates bending processing in the desired direction and prevents bending in other directions. Furthermore, since the busbar can be omitted, it also helps to reduce the number of parts and assembly steps.

[0038] The relay contact device 30 of Embodiment 3 of the present invention is as follows: Figure 3 As shown, in an electromagnetic relay in which the electromagnet device 300 opens and closes the contact device, the contact device 30 includes: a stainless steel metal container 32 with a through hole 31; a tube guide 33 made of Fe-Ni alloy inserted into the through hole 31; a sodium barium glass insulating material 34 that hermetically seals the tube guide 33 and the metal container 32; a terminal block 35 made of copper alloy that passes through the tube guide 33 and is hermetically fixed to the tube guide 33; and a fixed contact 310 supported by the terminal block 35. The terminal block 35 comprises a Fe-Ni alloy cap 320 covering and sealing the periphery of the opening of a metal container 32, a movable contact 340 supported by a shaft 330 through which the cap 320 is installed to exert the spring force, and a movable contact 350 provided on the movable contact 340. The terminal block 35 consists of a cylindrical body 36 and a flat head 37. Furthermore, the head 37 has a fixing portion 38 formed by a through hole, the inner diameter center axis of which is not coaxial with the outer diameter center axis of the body 36. The through hole constituting the fixing portion 38 is arranged orthogonally to the axis of the rod-shaped body 36 on the outer surface of the head 37 of the terminal block 35. The terminal block 35 is hermetically mounted using a wax material to a tube guide 33 having a through hole at its cylindrical bottom. Figure 4 As shown, when the external device 700 is fixed to the contact device 30, it is configured such that the electrode portion 710 of the external device 700 can be fastened to the busbar 360 of the fixing portion 38 by means of a screw 370. Therefore, since the installation is orthogonal to the central axis of the body 36 and the central axis of the fixing portion 38, the axial direction of the terminal block 35 and the rotation axis of the screw fastening of the terminal block 35 are arranged in different directions. Thus, the rotational torque of the screw fastening is not applied to the insulating material 34.

[0039] The relay contact device 40 of Embodiment 4 of the present invention is as follows: Figure 5 As shown, in an electromagnetic relay in which the electromagnet device 400 opens and closes the contact device, the relay contact device 40 includes: an iron metal container 42 with a through hole 41; a tube guide 43 made of Fe-Ni alloy inserted through the through hole 41; a sodium barium glass insulating material 44 that hermetically seals the tube guide 43 and the metal container 42; a copper terminal block 45 that passes through the tube guide 43 and is hermetically fixed to the tube guide 43; and a fixed contact supported by the terminal block 45. The terminal block 45 comprises a Fe-Ni alloy cover 420 that covers and seals the periphery of the opening of the metal container 42, a movable contact 440 supported by a shaft 430 that penetrates the cover 420 and is mounted to exert the spring force of a spring, and a movable contact 450 provided on the movable contact 440. The terminal block 45 has a cylindrical body 46 and a flat head 47. Furthermore, the head 47 has a fixing portion 48 formed by a through hole, which is not coaxially arranged with the shaft of the rod-shaped body 46. The through hole constituting the fixing portion 48 is provided through the head 47, which is formed by extending in a plate shape from the outer side of the rod-shaped body 46 of the terminal block 45. The terminal block 45 is hermetically mounted using wax material to a tube guide 43 having a shape with a through hole at the cylindrical bottom. The outer side of the plate-shaped head 47 can be bent to a desired angle, and the fixing portion 48 is provided on the side near its outer end. Figure 6 As shown, when fixing the contact device 40 and the external device 700, the head 47 is bent so that the fixing part 38 can be directly fastened to the electrode part 710 of the external device 700 by the screw 470 even without a busbar. The fixing part 48 is configured to be fixed to the external device 700 at a position spaced apart from the shaft of the rod-shaped body 46, so that the rotational torque of the screw fastening is not applied to the insulating material 44.

[0040] In each of the above embodiments, the fixing part is provided with a protrusion on the side of the head instead of a through hole, and the protrusion is used to connect with the external device 700.

[0041] (Industrial applicability)

[0042] This invention can be used with all hermetic terminals, including hermetic terminals mounted on the main relay device of a vehicle system such as an HEV or EV, and all relay devices, including the main relay device of a system such as an HEV or EV.

[0043] Label Explanation

[0044] 10. Airtight terminal, 11. Through hole, 12. Metal container, 13. Tube guide, 14. Insulating material, 15. Terminal block, 16. Body, 17. Head, 18. Fixing part, 20. Airtight terminal, 21. Through hole, 22. Metal container, 23. Tube guide, 24. Insulating material, 25. Terminal block, 26. Body, 27. Head, 28. Fixing part, 30. Contact device, 31. Through hole, 32. Metal container, 33. Tube guide, 34. Insulating material, 35. Terminal block, 36. Body, 37. Head, 38. Fixing part, 38. Electromagnetic device. 300, fixed contact 310, cover 320, shaft 330, movable contact 340, movable contact 350, busbar 360, spiral component 370, contact device 40, through hole 41, metal container 42, pipe guide 43, insulating material 44, terminal block 45, body 46, head 47, fixing part 48, electromagnet device 400, fixed contact 410, cover 420, shaft 430, movable contact 440, movable contact 450, spiral 470, external device 700, electrode part 710.

Claims

1. A hermetic terminal, characterized in that, include: The device comprises a metal container having a through hole, a tube guide inserted into the through hole, an insulating material encapsulating the metal container and the tube guide, and a terminal block made of low-resistance metal passing through and fixed to the tube guide. The terminal block consists of at least a torso and a head formed by extending the terminal block. The head has a fixing portion whose axis is not coaxial with the axis of the torso, and the direction of the axis of the fixing portion is different from the extension direction of the head.

2. The airtight terminal according to claim 1, wherein, The fixing part includes a through hole for spiral fastening.

3. The airtight terminal according to claim 1 or 2, wherein, The terminal block is made of low-resistance metal.

4. The airtight terminal according to claim 1 or 2, wherein, The terminal block is made of copper, aluminum, or copper-based alloys or aluminum-based alloys.

5. The airtight terminal according to claim 1 or 2, wherein, The insulating material is made of glass or epoxy resin.

6. The airtight terminal according to claim 1 or 2, wherein, The head is located on the outside of the terminal block.

7. The airtight terminal according to claim 1 or 2, wherein, The head is designed to be flat.

8. The airtight terminal according to claim 1 or 2, wherein, The head is bent at the desired angle.

9. The airtight terminal according to claim 1 or 2, wherein, The fixing part is constructed using any one or more of the following: through hole, non-through hole, spiral hole or spiral hole, groove, protrusion and convex part.

10. The airtight terminal according to claim 1 or 2, wherein, The central axis of the fixing part is set orthogonally to the central axis of the torso.

11. The airtight terminal according to claim 1 or 2, wherein, The central axis of the torso and the central axis of the fixing part are arranged in different directions.

12. The airtight terminal according to claim 1 or 2, wherein, The fixing part is configured to be fixed to an external device at a position spaced apart from the central axis of the torso.

13. A contact device, characterized in that, In an electromagnetic relay that uses an electromagnet to open and close the contact device, the contact device includes at least: a metal container with a through hole, a tube guide inserted through the through hole, an insulating material encapsulating the tube guide and the metal container, a terminal block penetrating the tube guide and fixed to the tube guide, a fixed contact supported by the terminal block, a cover covering and sealing the periphery of the opening of the metal container, a movable contact supported by a shaft penetrating the cover, and a movable contact disposed on the movable contact. The terminal block is composed of at least a torso and a head formed by extending the terminal block. The head has a fixing portion whose axis is not coaxial with the axis of the torso, and the direction of the axis of the fixing portion is different from the extension direction of the head.

14. The contact device according to claim 13, wherein, The fixing part includes a through hole for spiral fastening.

15. The contact device according to claim 13 or 14, wherein, The terminal block is made of low-resistance metal.

16. The contact device according to claim 13 or 14, wherein, The terminal block is made of copper, aluminum, or copper-based alloys and aluminum-based alloys.

17. The contact device according to claim 13 or 14, wherein, The insulating material is made of glass or epoxy resin.

18. The contact device according to claim 13 or 14, wherein, The head is located on the outside of the terminal block.

19. The contact device according to claim 13 or 14, wherein, The head is designed to be flat.

20. The contact device according to claim 13 or 14, wherein, The head is bent at the desired angle.

21. The contact device according to claim 13 or 14, wherein, The fixing part is composed of any one or more of the following: through hole, non-through hole, spiral hole or spiral cavity, groove, protrusion and convex part.

22. The contact device according to claim 13 or 14, wherein, The central axis of the fixing part is arranged orthogonally to the central axis of the torso.

23. The contact device according to claim 13 or 14, wherein, The central axis of the torso and the central axis of the fixing part are arranged in different directions.

24. The contact device according to claim 13 or 14, wherein, The fixing part is configured to be fixed to an external device at a position spaced apart from the central axis of the torso.

Images