Terminal, terminal member, and electronic apparatus

Abstract

To achieve a terminal with a reduced electric resistance.SOLUTION: A terminal (1) comprises: a lead pin (10) having a core material (10a) and a first coating material (10b) covering the core material; and a metal plate (20) joined to the lead pin. The electrical conductivity of the core material is higher than the electrical conductivity of the first coating material. The core material has an exposed part (31) exposed from the first coating material. The metal plate is joined to the exposed part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a terminal, a terminal member including the terminal, and an electrical device including the terminal member. [Background technology]

[0002] Patent Document 1 discloses a terminal having a conductive pin made of a composite metal material consisting of a copper core material and an Fe—Cr alloy jacket material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] WO2017 / 006881 Summary of the Invention [Problem to be solved by the invention]

[0004] One aspect of the present disclosure provides a terminal or the like with reduced electrical resistance. [Means for solving the problem]

[0005] In order to solve the above problem, a terminal according to one embodiment of the present disclosure comprises a lead pin having a core material and a first coating material that coats the core material, and a metal plate joined to the lead pin, wherein the electrical conductivity of the core material is higher than the electrical conductivity of the first coating material, the core material has an exposed portion that is exposed from the first coating material, and the metal plate is joined to the exposed portion. [Effects of the Invention]

[0006] According to one aspect of the present disclosure, a terminal or the like with reduced electrical resistance can be realized. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram illustrating an outline of an electrical device according to a first embodiment of the present disclosure. [Figure 2] 1 is a perspective view illustrating a terminal member according to a first embodiment of the present disclosure. [Figure 3] 1 is a cross-sectional view illustrating a terminal member according to a first embodiment of the present disclosure. [Figure 4] 1 is a front view illustrating a terminal member according to a first embodiment of the present disclosure. [Figure 5] 1 is a side view illustrating a terminal member according to a first embodiment of the present disclosure. [Figure 6] FIG. 2 is a perspective view illustrating an exposed portion. [Figure 7] FIG. 10 is a cross-sectional view illustrating a terminal member according to a second embodiment of the present disclosure. [Figure 8] FIG. 10 is a cross-sectional view illustrating a terminal member according to a third embodiment of the present disclosure. [Figure 9] FIG. 10 is a cross-sectional view illustrating a terminal member according to a fourth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Embodiment 1] An embodiment of the present disclosure will be described in detail below.

[0009] (Electrical Equipment) FIG. 1 is a diagram illustrating an outline of an electric device 200 according to a first embodiment of the present disclosure. The electric device 200 is a device driven by power supplied from a power source 300. The electric device 200 may be a device installed in an electric product, such as a compressor installed in an air conditioner or a refrigerator. The type of the electric device 200 is not particularly limited. As shown in FIG. 1 , the electric device 200 includes a terminal member 100, a housing 210, and an electric component 220.

[0010] The electric component 220 is a component that constitutes the electric device 200. When the electric device 200 is a compressor, the electric component 220 is a component that has a function of compressing air.

[0011] The box body 210 is a housing that houses the electric component 220. The box body 210 has an opening 211. A lid body 110 of the terminal member 100, which will be described later, is joined to the box body 210 so as to close the opening 211. The box body 210 may be in an airtight state when the lid body 110 is joined. That is, the box body 210 may form an airtight container together with the lid body 110.

[0012] (Terminal material) FIG. 2 is a perspective view illustrating the terminal member 100. FIG. 3 is a cross-sectional view illustrating the terminal member 100. FIG. 4 is a front view illustrating the terminal member 100. FIG. 5 is a side view illustrating the terminal member 100. As shown in FIGS. 2 to 5, the terminal member 100 includes a cover body 110, a terminal 1, and a fixing member 120.

[0013] As described above, the lid 110 is a plate-like member joined to the box 210 so as to close the opening 211. The lid 110 has, for example, a disk-like shape. The lid 110 has a through-hole 111 penetrating in the thickness direction. The material of the lid 110 may be the same as or different from the material of the metal plate 20 described below. At least one of the lid 110 and the box 210 may be provided with a sealing member (not shown) for making the contact points between the lid 110 and the box 210 airtight.

[0014] Terminal 1 is a terminal that introduces current to electrical component 220. Terminal 1 is located within through-hole 111. Fixing member 120 fixes terminal 1 to through-hole 111. Fixing member 120 may contain, for example, glass. This makes it easier to ensure airtightness around terminal 1. The glass contained in fixing member 120 may be soda-lime glass, soda-barium glass, or borosilicate glass. This makes it even easier to ensure airtightness around terminal 1. However, when fixing member 120 contains glass, the type of glass is not limited to these. Furthermore, fixing member 120 does not necessarily have to contain glass, and may contain, for example, resin or ceramic.

[0015] (Terminal) The terminal 1 is electrically connected to the electric component 220. Therefore, in the electric device 200, even when the box 210 and the lid 110 form an airtight container, a current can be introduced into the electric component 220 via the terminal 1. For simplicity, only one terminal 1 is shown in FIGS. 1 to 5. However, the number of terminals 1 included in the terminal member 100 is not limited to this, and the terminal member 100 may include multiple terminals 1. When the terminal member 100 includes multiple terminals 1, multiple through holes 111 may be formed in the lid 110 corresponding to the multiple terminals 1, respectively, or multiple terminals 1 may be located within a single through hole 111. The terminal 1 includes a lead pin 10 and a metal plate 20.

[0016] The lead pin 10 has a core material 10a and a first coating material 10b that coats the core material 10a. The electrical conductivity of the core material 10a may be higher than the electrical conductivity of the first coating material 10b. This allows the core material 10a to serve as a main path for current to flow in the lead pin 10. The lead pin 10 may have a cylindrical shape in a portion other than an exposed portion 31, which will be described later, but is not limited to this shape.

[0017] The core material 10a may contain copper. The copper may be, for example, oxygen-free copper. This improves the electrical conductivity of the core material 10a and reduces the electrical resistance of the lead pin 10. However, the core material 10a does not necessarily have to contain copper.

[0018] The first coating material 10b may contain either an alloy of iron and chromium or iron. The iron referred to here may be, for example, cold-rolled steel plate (SPC, Steel Plate Cold). The alloy of iron and chromium referred to here may be, for example, stainless steel such as SUS304.

[0019] Specifically, when the first coating material 10b contains an alloy of iron and chromium, the lead pin 10 becomes less susceptible to rust and the strength of the lead pin 10 is improved. Furthermore, when the fixing member 120 contains glass, the airtightness at the contact point between the first coating material 10b and the fixing member 120 is improved.

[0020] Furthermore, when the first coating material 10b contains iron, the lead pin 10 is less susceptible to rust and has improved strength compared to when the first coating material 10b contains neither an iron-chromium alloy nor iron. Furthermore, when the first coating material 10b contains iron, the electrical conductivity of the lead pin 10 is improved compared to when the first coating material 10b contains an iron-chromium alloy. However, the first coating material 10b does not have to contain either an iron-chromium alloy or iron.

[0021] The metal plate 20 is a member to which the power source 300 is connected. The metal plate 20 may have, for example, a flat plate shape, but is not limited to this. The metal plate 20 and the power source may be electrically connected by a lead wire (not shown). A receiving member (not shown) that can be fitted into the metal plate 20 may be attached to the end of the lead wire that is connected to the metal plate 20. The receiving member may have, for example, a claw into which the end of the metal plate 20 is fitted. In this case, the metal plate 20 and the power source can be easily connected by fitting the end of the metal plate 20 into the claw of the receiving member. However, the method of connecting the metal plate 20 and the power source is not limited to this.

[0022] The metal plate 20 may contain at least one of copper, iron, and an alloy of iron and chromium. The copper referred to here may be, for example, brass. The iron referred to here may be, for example, a cold-rolled steel plate. The iron and chromium alloy referred to here may be, for example, stainless steel such as SUS304.

[0023] When the metal plate 20 contains copper, the electrical conductivity of the metal plate 20 is improved. Furthermore, when the metal plate 20 contains iron or an alloy of iron and chromium, the stability of the receiving member connected to the metal plate 20 is improved. However, the metal plate 20 does not have to contain any of copper, iron, or an alloy of iron and chromium.

[0024] In the terminal 1, the core material 10a has an exposed portion 31 exposed from the first coating material 10b. The metal plate 20 is bonded to the exposed portion 31. In other words, the metal plate 20 is bonded to the core material 10a without the first coating material 10b. This reduces the electrical resistance between the lead pin 10 and the metal plate 20 compared to, for example, a case where the metal plate 20 is bonded to the first coating material 10b.

[0025] Furthermore, by reducing the electrical resistance between the lead pin 10 and the metal plate 20, heat generation in the terminal 1 can be reduced. This reduces the possibility that the metal plate 20 will come off the lead pin 10 due to heat generated by the terminal 1 itself. Furthermore, when the terminal 1 is connected to the lid 110 using glass or resin, this reduces the possibility that the glass or resin will peel off or crack due to heat generated during use of the terminal 1.

[0026] Furthermore, the terminal 1 can improve the energy efficiency of the electrical device 200. Such an effect also contributes to achieving, for example, Goal 7 of the Sustainable Development Goals (SDGs) advocated by the United Nations, "Affordable and clean energy."

[0027] The metal plate 20 may be bonded to the exposed portion 31 by one or more bonding materials 25. The bonding materials 25 may be a bonding material that can electrically connect the metal plate 20 and the exposed portion 31. In the example shown in Fig. 2 etc., the bonding materials 25 bond the metal plate 20 and the first portion 11 at two locations, but the number of bonding materials 25 is not limited to this.

[0028] The metal plate 20 and the exposed portion 31 may be joined by welding. In this case, the joining material 25 may be a part of the exposed portion 31 that has melted and solidified again, a part of the metal plate 20 that has melted and solidified again, or a combination of a part of the first portion 11 and a part of the metal plate 20 that have melted and solidified again. In joining by welding, less heat is applied to areas other than the joined parts compared to, for example, joining using a conductive joining material. This reduces the effect of thermal shock on areas other than the joined parts between the metal plate 20 and the exposed portion 31, such as the electrical component 220.

[0029] Alternatively, the metal plate 20 and the exposed portion 31 may be joined by a conductive bonding material. In this case, the bonding material 25 is a conductive bonding material. The conductive bonding material may be, for example, solder or silver brazing, but is not limited to these. Bonding using a conductive bonding material provides a greater bonding strength relative to the area of ​​the joint compared to bonding by welding, for example. Therefore, even if the area of ​​the exposed portion 31 is small, it is easy to bond the metal plate 20 to the exposed portion 31.

[0030] 6 is a perspective view illustrating the exposed portion 31. As shown in FIG. 6, the exposed portion 31 may have a first surface 31a that is aligned with the longitudinal direction of the lead pin 10. If the inclination of the first surface 31a with respect to the longitudinal direction of the lead pin 10 is 5° or less, it can be said that the first surface 31a is aligned with the longitudinal direction of the lead pin 10. The first surface 31a may have a substantially rectangular shape. The metal plate 20 may be joined to the first surface 31a.

[0031] In the exposed portion 31, the area of ​​the first surface 31a can be increased by lengthening the length of the first surface 31a in the longitudinal direction of the lead pin 10, i.e., the length of the first surface 31a from the first end of the lead pin 10, as necessary. In other words, the bonding area between the metal plate 20 and the exposed portion 31 can be increased. This can improve the bonding strength between the metal plate 20 and the exposed portion 31.

[0032] 6, the exposed portion 31 may further have a second surface 31b that connects the first surface 31a and the side surface of the lead pin 10. The second surface 31b may have a shape surrounded by straight lines and arcs.

[0033] The second surface 31b may be perpendicular to the longitudinal direction of the lead pin 10. Here, "perpendicular" means that it can be considered to be substantially perpendicular. If the inclination of the second surface 31b with respect to a plane perpendicular to the longitudinal direction of the lead pin 10 is 5° or less, the second surface 31b can be considered to be substantially perpendicular to the longitudinal direction of the lead pin 10. Furthermore, the second surface 31b may be inclined with respect to the longitudinal direction of the lead pin 10 to such an extent that it cannot be considered to be substantially perpendicular to the longitudinal direction of the lead pin 10.

[0034] 3, there may be a gap d1 between the metal plate 20 and the second surface 31b. This makes it less likely that interference between the metal plate 20 and the lead pin 10 will occur due to differences in the thermal expansion coefficients of the metal plate 20 and the lead pin 10, or variations during the manufacture of the terminal 1. The specific value of the gap d1 may be, for example, in the range of 0.1 mm or more and 1.0 mm or less, but is not limited to this.

[0035] 3, the side of the terminal 1 where the exposed portion 31 is located is referred to as the first side, and the side opposite the first side is referred to as the second side. As described above, the fixing member 120 fixes the terminal 1 to the through-hole 111. At this time, there may be a distance d2 between the end 121 on the first side of the fixing member 120 and the end 31c on the second side of the exposed portion 31. When the second surface 31b has a shape surrounded by straight lines and arcs, the end 31c may be the center point of the arc surrounding the second surface 31b.

[0036] In this case, stress on the lead pin 10 is less likely to concentrate on the exposed portion 31 compared to when there is no distance d2 between the first end 121 of the fixing member 120 and the second end 31c of the exposed portion 31. This reduces the possibility of stress concentrating on the exposed portion 31 and damaging the terminal 1. The specific value of the distance d2 may be, for example, in the range of 0.5 mm or more and 15.0 mm or less, but is not limited to this.

[0037] When the exposed portion 31 has the second surface 31b, the position of the second surface 31b in the longitudinal direction of the lead pin 10 corresponds to the position of the second-side end 31c of the exposed portion 31 in that direction. When the exposed portion 31 has a surface that is inclined with respect to the longitudinal direction of the lead pin 10, the position of the point on that surface that is closest to the first-side end 121 of the fixing member 120 in the longitudinal direction of the lead pin 10 corresponds to the position of the end 31c.

[0038] Furthermore, the second-side end 122 of the fixing member 120 may have an arched shape. In other words, the second-side end 122 of the fixing member 120 may have a convex shape. In other words, more specifically, in a cross section of the lead pin 10 and the fixing member 120 cut along a plane along the longitudinal direction of the lead pin 10, the second-side end 122 of the fixing member 120 may have a curved shape that protrudes in a direction from the inside to the outside of the fixing member 120. In other words, the second-side end 122 of the fixing member 120 does not need to be tapered. This reduces the possibility of stress concentration and breakage at a portion of the terminal 1 located near the end 122, compared to when the end 122 does not have an arched shape.

[0039] Furthermore, in the terminal member 100, the lid 110 may further have a tubular portion 112 extending from the through hole 111 to the second side. The tubular portion 112 may have an inner surface 112a facing the terminal 1 and an open end 112b on the second side. In this case, the fixing member 120 may be in contact with both the inner surface 112a and the end face of the open end 112b of the tubular portion 112. This increases the contact area between the fixing member 120 and the lid 110 compared to, for example, a case where the fixing member 120 is in contact only with the inner surface 112a of the tubular portion 112. This improves the airtightness around the terminal 1.

[0040] [Embodiment 2] Other embodiments of the present disclosure will be described below. For convenience of explanation, the same reference numerals will be used to designate components having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

[0041] 7 is a cross-sectional view illustrating a terminal member 100A according to embodiment 2. The terminal member 100A differs from the terminal member 100 in that the terminal member 100A includes a terminal 1A instead of the terminal 1. The terminal 1A differs from the terminal 1 in that the terminal 1A includes a lead pin 40 instead of the lead pin 10 and a metal plate 50 instead of the metal plate 20.

[0042] The lead pin 40 includes a second coating material 10c in addition to the configuration of the lead pin 10. The second coating material 10c is a member that covers the exposed portion 31. The second coating material 10c may have higher corrosion resistance than the first coating material 10b. For example, the ionization tendency of the second coating material 10c may be lower than the ionization tendency of the first coating material 10b. When the first coating material 10b includes either an alloy of iron and chromium or iron, the second coating material 10c may be, for example, a nickel plating layer. However, the first coating material 10b and the second coating material 10c are not limited thereto. By including the second coating material 10c, the lead pin 40 has higher corrosion resistance than the lead pin 10.

[0043] In the terminal 1A, the metal plate 20 is joined to the exposed portion 31 via the second coating material 10c. In this terminal 1A as well, the metal plate 20 is joined to the core material 10a without the first coating material 10b. Therefore, in the terminal 1A as well, the electrical resistance between the lead pin 40 and the metal plate 20 can be reduced compared to when the lead pin 40 does not have the exposed portion 31.

[0044] 7, the second coating material 10c may cover the first coating material 10b. This further improves the corrosion resistance of the lead pin 40 compared to when the second coating material 10c covers only the exposed portion 31. However, the second coating material 10c does not have to cover the first coating material 10b.

[0045] 7, the second coating material 10c covers the entire first coating material 10b of the lead pin 40. However, the second coating material 10c may cover only a portion of the first coating material 10b.

[0046] For example, the second coating material 10c may cover a portion of the first coating material 10b that is not covered by the fixing member 120. Specifically, in the manufacturing process of the terminal member 100A, the lead pin 40 without the second coating material 10c may be fixed in the through hole 111 by the fixing member 120. Thereafter, the portion of the lead pin 40 that is not covered by the fixing member 120 may be plated to form the lead pin 40 that has a plating layer as the second coating material 10c. In this case, the second coating material 10c covers the portion of the first coating material 10b that is not covered by the fixing member 120.

[0047] Furthermore, when the second coating material 10c is a nickel-plated layer, the second coating material 10c may contain additives depending on the plating method. For example, when the second coating material 10c is formed by electrolytic plating, the second coating material 10c may contain boron. When the second coating material 10c is formed by electroless plating, the second coating material 10c may contain phosphorus.

[0048] Furthermore, in the lead pin 40, the second coating material 10c may be further coated with a coating material having higher corrosion resistance than the second coating material 10c. For example, if the second coating material 10c is a nickel-plated layer, the second coating material 10c may be coated with, for example, gold. This can further improve the corrosion resistance of the lead pin 40.

[0049] Furthermore, the metal plate 50 may have a structure in which the surface of the metal plate 20 is coated with a third coating material 21. The third coating material 21 may be, for example, nickel. In this case, the metal plate 50 may be said to have a structure in which the metal plate 20 is nickel-plated. This improves the corrosion resistance of the metal plate 50. However, the third coating material 21 is not limited to nickel. Furthermore, the second coating material 10c and the third coating material 21 may be different from each other.

[0050] In the terminal member 100A, the terminal 1A does not necessarily have to include the metal plate 50. For example, the terminal 1A may include the metal plate 20 instead of the metal plate 50. Furthermore, the terminal 1 of the first embodiment may include the metal plate 50 instead of the metal plate 20.

[0051] [Embodiment 3] Further embodiments of the present disclosure are described below.

[0052] 8 is a cross-sectional view illustrating a terminal 1B according to a third embodiment of the present disclosure. Terminal 1B differs from terminal 1 in that it includes a lead pin 60 instead of lead pin 10 and a metal plate 70 instead of metal plate 20.

[0053] The lead pin 60 differs from the lead pin 10 in that it has an exposed portion 32 instead of the exposed portion 31. The tip of the lead pin 60 is referred to as the tip portion 61. The exposed portion 32 may be located at the tip portion 61. Such a lead pin 60 can be manufactured by a simple process, for example, by cutting off the tip of the lead pin 60 that does not have the exposed portion 32.

[0054] The metal plate 70 differs from the metal plate 20 in that it has a first portion 71 and a second portion 72. The first portion 71 is a portion that follows the tip portion 61 of the lead pin 60. The second portion 72 is a portion that follows the side portion of the lead pin 60. The metal plate 70 may have a structure in which a plate material serving as the first portion 71 and a plate material serving as the second portion 72 are joined together. Alternatively, the metal plate 70 may be a single plate material that is bent at the boundary between the first portion 71 and the second portion 72.

[0055] The metal plate 70 may be joined to the lead pin 60 by a joining material 26. The joining material 26 joins the first portion 71 and the exposed portion 32. This allows current to flow from the metal plate 70 to the core material 10a in the terminal 1B as well, without passing through the first coating material 10b. This reduces the electrical resistance between the lead pin 60 and the metal plate 70. In FIG. 8, the joining material 26 joins the first portion 71 and the exposed portion 32 at one location, but this is not limiting.

[0056] The metal plate 70 may be further bonded to the lead pin 60 by a bonding material 27. The bonding material 27 bonds the second portion 72 and the first coating material 10b. That is, the metal plate 70 may also be bonded to the first coating material 10b. This increases the area where the metal plate 70 is bonded to the lead pin 60 compared to when the metal plate 70 is bonded only to the exposed portion 32. This improves the bonding strength between the metal plate 70 and the lead pin 60. Although the bonding material 27 bonds the second portion 72 and the first coating material 10b at two locations in FIG. 8, this is not limiting.

[0057] However, the metal plate 70 does not necessarily have to be joined to the first covering material 10b. Furthermore, if the metal plate 70 is not joined to the first covering material 10b, the metal plate 70 does not have to have the second portion 72.

[0058] The metal plate 70 and the exposed portion 32 may be joined by a conductive bonding material. Meanwhile, the metal plate 70 and the first coating material 10b may be joined by welding. That is, the bonding material 26 may be a conductive bonding material, and the bonding material 27 may be a part of the exposed portion 32 that has melted and then solidified again. In this case, the contact area between the metal plate 70 and the exposed portion 32 can be increased and the effects of thermal shock can be reduced.

[0059] Furthermore, in the lead pin 60, a portion of the first coating material 10b to which the metal plate 70 is bonded is referred to as a first portion 10ba, and a portion to which the metal plate 70 is not bonded is referred to as a second portion 10bb. The thickness of the first portion 10ba may be thinner than the thickness of the second portion 10bb. In this case, the electrical resistance between the lead pin 60 and the metal plate 70 can be further reduced compared to when the thickness of the first coating material 10b is constant.

[0060] [Embodiment 4] Further embodiments of the present disclosure are described below.

[0061] 9 is a cross-sectional view illustrating a terminal 1C according to a third embodiment of the present disclosure. Terminal 1C differs from terminal 1 in that it includes a lead pin 80 instead of lead pin 10 and a metal plate 90 instead of metal plate 20.

[0062] The lead pin 80 differs from the lead pin 60 in that it has an exposed portion 33 instead of the exposed portion 32. The tip of the lead pin 80 is referred to as the tip portion 81. The tip portion 81 may have a tip surface 82 that is inclined with respect to the longitudinal direction of the lead pin 80. Therefore, the exposed portion 33 also has a surface that is inclined with respect to the longitudinal direction of the lead pin 80. Like the lead pin 60, such a lead pin 80 can be manufactured by a simple process, for example, by cutting off the tip of the lead pin 80 that does not have the exposed portion 33. The inclination angle of the tip surface 82 with respect to the longitudinal direction of the lead pin 80 is not particularly limited, but may be, for example, within a range of 10° to 45°.

[0063] The metal plate 90 differs from the metal plate 20 in that it has a first portion 91 and a second portion 92. The first portion 91 is a portion that is along the tip portion 81 of the lead pin 80. The second portion 92 is a portion that is along the side portion of the lead pin 80. The metal plate 90 may have a structure in which a plate material serving as the first portion 91 and a plate material serving as the second portion 92 are joined together. Alternatively, the metal plate 90 may be a single plate material that is bent at the boundary between the first portion 91 and the second portion 92.

[0064] As described above, the tip portion 81 of the lead pin 80 has a tip surface 82 that is inclined with respect to the longitudinal direction of the lead pin 80. Therefore, the shape of the boundary portion between the first portion 91 and the second portion 92 is different from the shape of the boundary portion between the first portion 71 and the second portion 72 of the metal plate 70.

[0065] The metal plate 90 and the lead pin 80 may be bonded together by bonding materials 26 and 27. The bonding by bonding materials 26 and 27 is as described in the third embodiment. The metal plate 90 does not necessarily have to be bonded to the first coating material 10b. If the metal plate 90 is not bonded to the first coating material 10b, the metal plate 90 does not have to have the second portion 92.

[0066] As described above, exposed portion 33 has a surface that is inclined with respect to the longitudinal direction of lead pin 80. Therefore, the area of ​​exposed portion 33 is larger than the area of ​​exposed portion 32 in lead pin 60. Therefore, the bonding area between first portion 91 and exposed portion 33 in terminal 1C is larger than the bonding area between first portion 71 and exposed portion 32 in terminal 1B. This allows the electrical resistance of lead pin 80 to be lower than that of lead pin 60.

[0067] 〔summary〕 A terminal according to aspect 1 of the present disclosure comprises a lead pin having a core material and a first coating material that coats the core material, and a metal plate joined to the lead pin, wherein the electrical conductivity of the core material is higher than the electrical conductivity of the first coating material, the core material has an exposed portion that is exposed from the first coating material, and the metal plate is joined to the exposed portion.

[0068] A terminal according to a second aspect of the present disclosure is similar to the first aspect, in that the exposed portion has a first surface that is aligned along the longitudinal direction of the lead pin.

[0069] A terminal according to a third aspect of the present disclosure is similar to the second aspect, wherein the exposed portion further has a second surface perpendicular to the longitudinal direction of the lead pin, and the metal plate and the second surface are spaced apart.

[0070] A terminal according to a fourth aspect of the present disclosure is the terminal of the first aspect, wherein the exposed portion is located at the tip of the lead pin.

[0071] A terminal according to a fifth aspect of the present disclosure is similar to the first aspect, in that the tip portion has a tip surface that is inclined with respect to the longitudinal direction of the lead pin.

[0072] A sixth aspect of the present disclosure relates to a terminal in any one of the first to fifth aspects, wherein the metal plate is further joined to the first covering material.

[0073] A terminal according to aspect 7 of the present disclosure is the same as aspect 6, except that the thickness of the first coating material at the portion where the metal plate is joined is thinner than the thickness of the portion where the metal plate is not joined.

[0074] In the terminal according to an eighth aspect of the present disclosure, in any one of the first to seventh aspects, the metal plate and the exposed portion are joined by welding.

[0075] A ninth aspect of the present disclosure relates to the terminal of any one of the first to seventh aspects, wherein the metal plate and the exposed portion are joined together with a conductive joining material.

[0076] A terminal according to a tenth aspect of the present disclosure is similar to the ninth aspect, in that the metal plate is also joined to the first covering material, and the metal plate and the first covering material are joined by welding.

[0077] A terminal according to aspect 11 of the present disclosure is any one of aspects 1 to 10, wherein the lead pin further has a second coating material covering at least the exposed portion, the metal plate is joined to the exposed portion via the second coating material, and the second coating material has higher corrosion resistance than the first coating material.

[0078] A twelfth aspect of the present disclosure relates to the terminal of the eleventh aspect, wherein the second coating material covers the first coating material.

[0079] The terminal member according to aspect 13 of the present disclosure comprises a cover body having a through hole, a terminal according to any one of aspects 1 to 12 positioned within the through hole, and a fixing member that fixes the terminal to the through hole.

[0080] A terminal member according to a fourteenth aspect of the present disclosure is similar to the thirteenth aspect, in that the fixing member and the exposed portion are spaced apart.

[0081] The terminal member of aspect 15 of the present disclosure is the same as that of aspect 13 or 14, in which the side on which the exposed portion is located relative to the cover body is the first side, and the side opposite the first side is the second side, and the end of the fixing member on the second side has an arched shape.

[0082] The terminal member of aspect 16 of the present disclosure is, in any of aspects 13 to 15, such that the side on which the exposed portion is located relative to the lid body is a first side, and the side opposite the first side is a second side, the lid body further has a tubular portion extending from the through hole to the second side, the tubular portion having an inner surface facing the terminal and an open end on the second side, and the fixing member contacts the inner surface of the tubular portion and the end face of the open end.

[0083] An electrical device according to aspect 17 of the present disclosure comprises a terminal member according to any one of aspects 13 to 16, a box body to which the lid body is joined, and an electrical component housed in the box body and electrically connected to the terminal.

[0084] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. [Explanation of symbols]

[0085] 1, 1A, 1B, 1C terminals 10, 40, 60, 80 lead pins 10a core material 10b 1st covering material 10c 2nd covering material 20, 50, 70, 90 metal plate 31, 32, 33 Exposed part 31a 1st page 31b 2nd side 31c Second end of exposed portion 61, 81 Tip 82 Tip surface 100, 100A terminal material 110 Lid 120 Fixing member 121 first end of fixing member 122 second end of fixing member 200 Electrical Equipment 210 Box body 220 Electrical Components

Claims

1. a lead pin having a core material and a first coating material that coats the core material; a metal plate joined to the lead pin, the electrical conductivity of the core material is higher than the electrical conductivity of the first coating material; the core material has an exposed portion exposed from the first coating material, The metal plate is joined to the exposed portion.

2. The terminal according to claim 1 , wherein the exposed portion has a first surface extending along the longitudinal direction of the lead pin.

3. The terminal according to claim 2 , wherein the exposed portion further has a second surface perpendicular to a longitudinal direction of the lead pin, and the metal plate and the second surface are spaced apart.

4. The terminal according to claim 1 , wherein the exposed portion is located at a tip end of the lead pin.

5. 5. The terminal according to claim 4, wherein the tip portion has a tip surface that is inclined with respect to the longitudinal direction of the lead pin.

6. The terminal according to claim 1 , wherein the metal plate is further joined to the first covering material.

7. The terminal according to claim 6 , wherein the thickness of the first covering material at a portion to which the metal plate is joined is thinner than the thickness of a portion to which the metal plate is not joined.

8. The terminal according to claim 1 , wherein the metal plate and the exposed portion are joined by welding.

9. The terminal according to claim 1 , wherein the metal plate and the exposed portion are joined together with a conductive joining material.

10. the metal plate is also bonded to the first coating material, The terminal according to claim 9 , wherein the metal plate and the first covering material are joined by welding.

11. the lead pin further includes a second coating material that covers at least the exposed portion; the metal plate is joined to the exposed portion via the second coating material, The terminal according to claim 1 or 2, wherein the second coating material has higher corrosion resistance than the first coating material.

12. The terminal of claim 11 , wherein the second coating material covers the first coating material.

13. a lid having a through hole; The terminal according to claim 1 or 2, which is located in the through hole; a fixing member that fixes the terminal in the through hole.

14. a side of the lid where the exposed portion is located is defined as a first side, and a side opposite to the first side is defined as a second side; The terminal member according to claim 13 , wherein the first end of the fixing member and the second end of the exposed portion are spaced apart from each other.

15. a side of the lid where the exposed portion is located is defined as a first side, and a side opposite to the first side is defined as a second side; The terminal member according to claim 13 , wherein the second end of the fixing member has an arched shape.

16. a side of the lid where the exposed portion is located is defined as a first side, and a side opposite to the first side is defined as a second side; the lid body further includes a cylindrical portion extending from the through hole to the second side, the cylindrical portion has an inner surface facing the terminal and an open end portion on the second side, The terminal member according to claim 13 , wherein the fixing member is in contact with the inner surface of the cylindrical portion and an end face of the opening end portion.

17. The terminal member according to claim 13; a box body to which the lid body is joined; an electrical component housed in the box and electrically connected to the terminal.

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