WO2019181511A1

WO2019181511A1 - Contact element and method for manufacturing contact element

Info

Publication number: WO2019181511A1
Application number: PCT/JP2019/008888
Authority: WO
Inventors: 文彦草野; 卓関谷; 悠馬横井; 幸司比嘉; 石川　寛; 卓也河本
Original assignee: 三菱電機株式会社
Priority date: 2018-03-20
Filing date: 2019-03-06
Publication date: 2019-09-26
Also published as: TWI705865B; CN111868865B; KR102420675B1; JP6952872B2; KR20200119300A; JPWO2019181511A1; TW201940271A; CN111868865A

Abstract

According to the present invention, a movable contact element (12) is provided with a second base metal (32) and a second contact (42) fixed to the second base metal (32). The movable contact element (12) is provided with a second intermediate member (62) which is a conductive member provided between the second base metal (32) and the second contact (42), the second intermediate member (62) having a lower hardness than the second contact (42) and being capable of plastic flow. On the outer peripheral surface of the second base metal (32) is formed a recess part which is recessed in a direction perpendicular to the arrangement direction of the second base metal (32), the second intermediate member (62), and the second contact (42), and into which a jig provided in a movable part of an ultrasonic welding machine is inserted.

Description

Contact and contact manufacturing method

This invention relates to the contactor with which contactors, such as a circuit breaker and a switch, are provided, and the manufacturing method of a contactor.

Contactors such as circuit breakers and switches are provided with movable contacts and fixed contacts. Each of the movable contact and the fixed contact is configured by a contact and a base metal on which the contact is provided.

There are a brazing method, a resistance welding method, and the like as a method of joining the contact to the base metal. However, in these joining methods, a flux for activating the metal interface is necessary, and a cleaning step after joining the contact to the base metal is necessary. Furthermore, in these joining methods, since the contact becomes high temperature when the contact is joined to the base metal, the contact and the base metal may be softened.

As these measures, in recent years, an ultrasonic bonding method is often used as a method for bonding a contact to a base metal. Patent Document 1 discloses a method for manufacturing a contact using an ultrasonic bonding method.

In Patent Document 1, after the base metal and the contact are sandwiched between the horn of the ultrasonic welder and the anvil of the ultrasonic welder, ultrasonic vibration is applied in a state where pressure is applied from the horn to the base metal and the contact. . The horn is a resonator that transmits vibration energy to the contact. The anvil is a jig for positioning the base metal and fixing the base metal. By applying ultrasonic vibration to the contact, ultrasonic welding is performed on the contact surface between the base metal and the contact.

Japanese Patent Publication No. 03-38033

However, in the technique disclosed in Patent Document 1, a plurality of grooves are provided on the contact-side surface of the base metal to prevent slippage between the contact point and the base metal when ultrasonic vibration is applied. In order to prevent slippage between the base metal and the anvil when ultrasonic vibration is applied, the end of the anvil on the base metal side is subjected to uneven knurling. Furthermore, in the technique disclosed in Patent Document 1, in order to prevent slippage between the horn and the contact when ultrasonic vibration is applied, an uneven knurling process is applied to the end of the horn on the contact side. Yes. When pressure is applied to the base metal and the contacts, a plurality of minute protrusions are formed on the anvil-side end face of the base metal on the portion that contacts the horn. When such a base metal is used for the contactor, when the contactor performs a breaking operation, an arc that should be generated between the two contact points facing each other is normally generated in the plurality of grooves formed in the base metal. Also, it occurs between the contact and the groove formed in a portion other than the region where the base metal faces. The arc described above is generated in a concentrated manner between the tip of the minute projection formed at one contact and the tip of the minute projection formed at the other contact. For this reason, the contact and base metal are exposed to the arc for a long time, and there is a problem that the contact and base metal are consumed quickly.

The present invention has been made in view of the above, and an object of the present invention is to obtain a contactor capable of suppressing progress of wear of a contact connected to a base metal by ultrasonic welding.

In order to solve the above-described problems and achieve the object, the contact according to the present invention includes a base metal and a contact fixed to the base metal. The contact is provided between the base metal and the contact, and includes a conductive member having a hardness lower than the contact hardness and capable of plastic flow. The outer peripheral surface of the base metal is recessed in a direction perpendicular to the direction in which the base metal, the conductive member, and the contact are arranged, and a recess into which a jig provided on the movable part of the ultrasonic welding machine is fitted is formed. .

According to the present invention, it is possible to suppress the progress of wear of the contact connected to the base metal by ultrasonic welding.

The figure which shows the structure of the contactor concerning embodiment of this invention The figure which shows the detail of a structure of the movable contact shown in FIG. The figure which shows the manufacturing process of the movable contact shown in FIG. The figure which shows the ultrasonic welding machine utilized in the manufacturing process of the movable contact shown in FIG. The block diagram of the 2nd metal base concerning the modification of an embodiment of the invention

Hereinafter, a contact and a method for manufacturing the contact according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing a configuration of a contact according to an embodiment of the present invention. FIG. 2 is a diagram showing details of the configuration of the movable contact shown in FIG.

FIG. 1 shows a contactor 100 including a contact 1 according to an embodiment of the present invention. The contactor 100 is a low-voltage or high-voltage circuit breaker or switch having a function of opening a contact when an overcurrent is generated in the distribution line.

The contact 1 includes a fixed contact 11, a movable contact 12, and a peeling mechanism 2.

The movable contact 12 is physically separated from the fixed contact 11 by the peeling mechanism 2 when an electric current of a certain level or more flows in the electric circuit in which the contactor 100 is provided. Thereby, the electric current which flows into the electric circuit where the contact 1 is connected is interrupted | blocked.

The fixed contact 11 includes a rectangular first base 31 that is a conductive fixed piece fixed to a housing (not shown) constituting the contactor 100, a first contact 41 that is a fixed contact, A first intermediate member 61 that is a conductive member provided between the base 31 and the first contact 41 is provided.

In the following, in the XYZ coordinates of the left-handed system, the arrangement direction of the first base metal 31, the first intermediate member 61, and the first contact 41 is the X axis direction, the direction orthogonal to the X axis direction is the Y axis direction, and the X axis A direction orthogonal to both the direction and the Y-axis direction is taken as a Z-axis direction.

Examples of the material of the first metal 31 include electrolytic copper and oxygen-free copper.

FIG. 1 shows a first end surface 3A, a second end surface 3B, a third end surface 3C, a fourth end surface 3D, and a sixth end surface 3F among the six end surfaces included in the first base metal 31.

The first end surface 3A of the first base metal 31 is an end surface of the first base metal 31 on the movable contact 12 side. The second end surface 3B of the first base metal 31 is an end surface on the opposite side of the first base metal 31 from the movable contact 12 side.

The third end face 3C of the first base metal 31 is one of the two end faces in the Y-axis direction. The fourth end surface 3D of the first base metal 31 is the other end surface of the two end surfaces in the Y-axis direction.

The sixth end surface 3F of the first base metal 31 is a first surface in a direction in which a normal line perpendicular to the surface including the first contact 41, the first intermediate member 61, and the first base metal 31 extends. The direction in which the normal line extends is equal to the Z-axis direction. A fifth end surface is formed on the opposite side of the first base 31 from the first surface.

The sixth end surface 3F of the first base 31 is provided with a recess 301 that is recessed from the sixth end surface 3F toward the fifth end surface. A recess similar to the recess 301 is provided on the fifth end face side of the first base 31.

The first intermediate member 61 is in contact with the first end face 3A of the first base 31. As the material of the first intermediate member 61, a conductive material whose hardness is lower than that of the first contact point 41 and capable of plastic flow is used. Examples of this conductive material include silver.

The first intermediate member 61 is, for example, a surface of the first contact 41 on the first metal base 31 side, which is separated by the difference in specific gravity of a plurality of materials constituting the first contact 41 when the first contact 41 is manufactured. It is formed by solidifying. The first intermediate member 61 can be formed on the surface of the first contact 41 on the side of the first base metal 31 by a vacuum vapor deposition method, a plating method, or the like in addition to the separation due to the specific gravity difference. By using the first intermediate member 61, when compressive stress is applied from the first metal base 31 to the first contact 41 during ultrasonic welding of the first contact 41 to the first metal base 31, the first contact 41. The first intermediate member 61 begins to plastically flow before the plastic flow. Accordingly, the load applied to the first contact 41 is relaxed, and brittle fracture of the first contact 41 is suppressed. Further, the bonding strength of the first contact 41 to the first base metal 31 in the solid phase is improved.

The first contact point 41 is fixed to the first base 31 via the first intermediate member 61. As the material of the first contact 41, a sintered metal having a hardness higher than that of the first intermediate member 61 is used. Examples of the sintered metal include silver tungsten alloy, tungsten carbide, a composite alloy of silver and copper, and silver graphite.

The movable contact 12 includes a rectangular second base 32 that is a conductive movable piece that is operated by the peeling mechanism 2, a second contact 42 that is a movable contact, a second base 32, and a second contact 42. 2nd intermediate member 62 which is an electroconductive member provided between these.

The same material as the material of the first metal 31 is used for the material of the second metal 32.

FIG. 1 shows a first end surface 3A, a second end surface 3B, a third end surface 3C, a fourth end surface 3D, and a fifth end surface 3E among the six end surfaces of the second base metal 32.

The first end surface 3A of the second base metal 32 is an end surface of the second base metal 32 on the fixed contact 11 side. The second end face 3 </ b> B of the second base metal 32 is an end face opposite to the fixed contact 11 side of the second base metal 32.

The third end face 3C of the second base metal 32 is one of the two end faces in the Y-axis direction. The fourth end surface 3D of the second base metal 32 is the other end surface of the two end surfaces in the Y-axis direction.

The fifth end surface 3E of the second base metal 32 is a first surface in a direction in which a normal line perpendicular to the surface including the second contact 42, the second intermediate member 62, and the second base metal 32 extends. The direction in which the normal line extends is equal to the Z-axis direction. The second base metal 32 is formed with a sixth end surface on the side opposite to the first surface side of the second base metal 32.

On the fifth end surface 3E side of the second base metal 32, a recess 300 that is recessed from the fifth end surface 3E toward the sixth end surface is provided. A recess similar to the recess 300 is provided on the sixth end face side of the second base metal 32.

The second intermediate member 62 is in contact with the first end face 3A of the second base metal 32. A material similar to the material of the first intermediate member 61 is used as the material of the second intermediate member 62.

The second intermediate member 62 is, for example, a surface separated by the specific gravity difference of a plurality of materials constituting the second contact 42 when the second contact 42 is manufactured. It is formed by solidifying. The second intermediate member 62 can be formed on the surface of the second contact 42 on the second metal base 32 side by a vacuum deposition method, a plating method, or the like, in addition to the separation by the specific gravity difference. By using the second intermediate member 62, when the second contact 42 is ultrasonically welded to the second metal base 32, when the compressive stress acts on the second contact 42 from the second metal base 32, the second contact 42 is obtained. The second intermediate member 62 begins to plastically flow before the plastic flow. Therefore, the load applied to the second contact 42 is relaxed, and brittle fracture of the second contact 42 is suppressed. Further, the bonding strength of the second contact 42 to the second base metal 32 in the solid state is improved.

The second contact 42 is fixed to the second base metal 32 via the second intermediate member 62. For the material of the second contact 42, the same sintered metal as the material of the first contact 41 is used.

The fixed contact 11 and the movable contact 12 thus configured are arranged in the contactor 100 so that the first contact 41 faces the second contact 42.

The contactor 100 shown in FIG. 1 is provided with one fixed contact 11 and one movable contact 12, but the number of each of the fixed contact 11 and the movable contact 12 is limited to one. Instead, a plurality may be used according to the number of distribution lines connected to the contactor 100.

Next, details of the shapes of the recess 300 and the recess 301 and specific examples of the dimensions of the fixed contact 11 and the movable contact 12 will be described. Hereinafter, the movable contact 12 will be described, and the fixed contact 11 will be omitted as it is configured in the same manner as the movable contact 12.

In FIG. 2, the first side surface of the second metal base 32 viewed from the fifth end surface 3 </ b> E, the cross section of the second contact 42, the second intermediate member 62 and the second metal base 32, and the second side of the second metal base 32 are shown. The second side surface viewed from the 6 end surface 3F is shown. The cross section is a cross section taken along line AA shown in FIG.

Step part 300b and step part 301b are formed in the second base metal 32. The step portion 300b corresponds to a boundary portion between the bottom surface 300a of the recess 300 and the fifth end surface 3E. The step portion 301b corresponds to a boundary portion between the bottom surface 301a of the recess 301 and the sixth end surface 3F.

The dimensions of the movable contact 12 are set so as to satisfy t ′ <0.5t, b ≦ L ′ <L, b ≦ L ″ <L, W ′ <W, W ″ <W.

T is the width of the second base metal 32 in the Z-axis direction. t ′ is the width in the Z-axis direction from the bottom surface 300 a of the recess 300 to the bottom surface 301 a of the recess 301. L is the width of the second base metal 32 in the Y-axis direction. L ′ is the width of the bottom surface 300 a of the recess 300 in the Y-axis direction. L ″ is the width in the Y-axis direction of the bottom surface 301 a of the recess 301. W is the width of the second base metal 32 in the X-axis direction. W ′ is the width of the bottom surface 300 a of the recess 300 in the X-axis direction. W ″ is the width of the bottom surface 301 a of the recess 301 in the X-axis direction. b is the width of the second contact 42 in the Y-axis direction.

For example, when t = 5 mm, W = 20 mm, L = 100 mm, and b = 8 mm, the dimensions of each part of the movable contact 12 are t ′ <2.5 mm, 8 mm ≦ L ′ <100 mm, 8 mm ≦ L ″ < 100 mm, W ′ <20 mm, and W ″ <20 mm.

Next, a method for manufacturing the movable contact 12 shown in FIG. 2 will be described. Note that the fixed contact 11 is configured in the same manner as the movable contact 12, and the description of the manufacturing method is omitted.

FIG. 3 is a diagram showing a manufacturing process of the movable contact 12 shown in FIG. FIG. 4 is a diagram showing an ultrasonic welding machine used in the manufacturing process of the movable contact 12 shown in FIG. FIG. 4 shows a front view of the ultrasonic welder 200 and a side view of the ultrasonic welder 200.

In step 1, the second metal base 32 and the second contact 42 are manufactured. At this time, a recess 300 and a recess 301 are formed in the second base metal 32. The concave portion 300 may be formed by cutting the fifth end surface 3E, or may be formed by applying pressure to the second base metal 32 by a press machine to plastically deform the fifth end surface 3E. The recess 301 is formed by the same method as the recess 300.

In Step 2, the second intermediate member 62 is formed on the surface of the second contact 42 on the second metal base 32 side.

In Step 3, the second metal base 32 manufactured in Step 1 is installed in the fixing portion 6b provided in the fixing base 6 of the ultrasonic welding machine 200. At this time, the first end face 3 </ b> A of the second base metal 32 is installed so as to face the pressing tool 8 of the ultrasonic welding machine 200.

In Step 4, by moving the two movable parts 6a provided on the fixed base 6 in the direction indicated by the arrow A, the second base metal 32 is sandwiched between the two movable parts 6a. At this time, the fixed jig 6a1 provided in one movable portion 6a enters the recess 300, and the fixed jig 6a2 provided in the other movable portion 6a enters the recess 301.

In addition, each of the fixed jig 6a1 and the fixed jig 6a2 has a tapered shape with a tapered tip, for example. With this configuration, the fixed jig 6a1 comes into contact with the corner portion between the step portion 300b and the fifth end surface 3E, and the fixed jig 6a1 comes into contact with the corner portion between the step portion 301b and the sixth end surface 3F. Therefore, the second base metal 32 can be firmly fixed.

In step 5, the second contact 42 is installed on the second base metal 32.

In Step 6, the second contact 42 is pushed in the vertical direction from the pressing tool 8 by the pressing tool 8 of the ultrasonic welding machine 200 moving in the direction indicated by the arrow B. When the pressure on the second contact 42 exceeds a certain value, ultrasonic vibration is applied to the second contact 42 from the pressing tool 8.

As a result, the first end surface 3A of the second base metal 32 and the end surface of the second intermediate member 62 on the second base metal 32 side are rubbed together, and the oxide existing on these mating surfaces is destroyed to generate a new surface. . As a result, the second contact 42 is joined to the second base metal 32 by the plastic flow of the second intermediate member 62.

In the contact manufacturing method according to the present embodiment, the second contact 42 can be joined to the second base metal 32 without using a metal activator such as a flux for activating the metal interface or a brazing material. The cleaning process after joining becomes unnecessary. Accordingly, the amount of material used for manufacturing the movable contact 12 is reduced, and the work time required for the cleaning process after joining can be saved.

In addition, since the brazing material is unnecessary, even when the ambient temperature of the first contact 41 and the second contact 42 rises to the temperature at the time of brazing due to the shut-off operation, the brazing material at the joint is directed toward the second contact 42. Therefore, the temperature resistance of the movable contact 12 is improved.

In the contact manufacturing method according to the present embodiment, the fixed jig 6a1 inserted into the recess 300 contacts the stepped portion 300b, and the fixed jig 6a2 inserted into the recessed portion 301 contacts the stepped portion 301b. The second metal base 32 can be firmly fixed. Therefore, it is possible to suppress slippage between the second base metal 32 and the fixed portion 6b without using an anvil that has been knurled as in the prior art.

Therefore, the first end surface 3A of the second base metal 32 and the end surface of the second intermediate member 62 on the second base metal 32 side can be sufficiently rubbed together, and a new surface can be generated reliably. As a result, the second contact 42 can be reliably bonded to the second base metal 32, and high bonding quality can be ensured.

In addition, when the recessed part 300 and the recessed part 301 are not formed in the 2nd base metal 32, since the 2nd base metal 32 cannot be firmly fixed by the fixed jig 6a1 and the fixed jig 6a2, vibration energy is applied to the fixed jig 6a1 and the fixed jig 6a2. Depending on the control method of the ultrasonic welding machine 200, the vibration operation stops before reaching the initially set condition, and the desired joint strength may not be ensured.

On the other hand, in the present embodiment, since the second base metal 32 is firmly fixed by the fixed jig 6a1 and the fixed jig 6a2, vibration energy does not escape to the fixed jig 6a1 and the fixed jig 62a2, and a desired joining is achieved. Strength can be secured.

Further, in the contact manufacturing method according to the present embodiment, since it is not necessary to use an anvil, a horn or the like that has been knurled, minute protrusions are formed on the second end surface 3B of the second metal base 32. In addition, no minute protrusion is formed on the surface of the second contact 42 on the first contact 41 side. Therefore, when the movable contact 12 and the fixed contact 11 are used as a contactor, when the contactor performs a blocking operation, each of the second contact 42 of the movable contact 12 and the first contact 41 of the fixed contact 11 is provided. An arc is generated on the entire surface facing each other. Therefore, compared with the prior art disclosed in Patent Document 1, the progress of wear of the second contact 42 and the first contact 41 is suppressed. Further, in the contact manufacturing method according to the present embodiment, since it is not necessary to form a groove on the contact side surface of the base metal as disclosed in Patent Document 1, an arc generated between the contacts is It does not occur between the grooves formed on the surface on the gold contact side, and the progress of the consumption of the base metal is suppressed. Further, since no minute protrusion is formed on the second end face 3B of the second base metal 32, the area of the contact surface with the peeling mechanism 2 is increased, and the second base metal 32 can be firmly fixed. Further, since no minute protrusion is formed on the second end face 3B of the first base metal 31, the area of the contact surface with a fixing member such as a housing for fixing the first base metal 31 is increased, and the first base metal is increased. 31 can be firmly fixed.

In the contact manufacturing method according to the present embodiment, since the fixed jig 6a1 is inserted into the recess 300 and the fixed jig 6a2 is inserted into the recess 301, the second base 32 is replaced each time the second base 32 is replaced. The fixed position of the gold 32 can be determined accurately. Accordingly, variations in manufacturing quality of the movable contact 12 are reduced.

Further, by using a sintered metal whose hardness is higher than the hardness of the first intermediate member 61 and the second intermediate member 62 as the material of the first contact 41 and the second contact 42, the first contact 41 and the second contact by arc. The progress of wear of the contact 42 can be minimized.

Furthermore, the silver used for the second intermediate member 62 and the electric copper or oxygen-free copper used for the second base metal 32 are metals that are easy to plastically flow. Therefore, for example, when the second contact 42 is joined to the second base metal 32 by ultrasonic joining, the second intermediate member 62 and the second base metal 32 are plastically flowed to each other. The oxide present on the mating surface of the base metal 32 is easily destroyed. Furthermore, the joining strength of the second contact 42 to the second base metal 32 is improved by mixing the mating surfaces of the second intermediate member 62 and the second base metal 32.

FIG. 5 is a configuration diagram of a second base metal according to a modification of the embodiment of the present invention. The number of recesses 300 formed in the fifth end surface 3E of the second base metal 32 is not limited to one, and may be two or more. FIG. 5 shows an example in which a concave portion 300A and a concave portion 300B are formed on the fifth end surface 3E of the second base metal 32. In this case, the tip shapes of the fixed jig 6a1 and the fixed jig 6a2 are shapes that can be inserted into the plurality of recesses.

In addition, you may form the hollow similar to the recessed part 300A and the recessed part 300B also in the 6th end surface 3F of the 2nd base metal 32. FIG. Moreover, you may form the hollow similar to the recessed part 300A and the recessed part 300B in each of the 5th end surface 3E and the 6th end surface 3F of the 1st base metal 31. FIG.

By providing a plurality of recesses in this way, the contact areas of the fixed jig 6a1 and the fixed jig 6a2 to the stepped portions forming the plurality of recesses are increased, and the second base metal 32 can be fixed more firmly.

In addition, the shape of the stepped portion 300b that forms the concave portion 300 may be a shape into which the fixed jig 6a1 enters, and may be a polygon other than a square or a circle. The shape of the stepped portion 301b that forms the recess 301 is the same. Further, the shape of the recess 300 may be the same as or different from the shape of the recess 301. For example, when the shape of each of the stepped portion 300b and the stepped portion 301b is a polygon having a square shape or more, the fixed jig contacts the stepped portion as compared with the case where the shape of each of the stepped portion 300b and the stepped portion 301b is a square. The area is increased, and the first base metal 31 or the second base metal 32 can be firmly fixed.

Note that the shapes of the first base metal 31 and the second base metal 32 are not limited to a square shape, as long as the recesses 300A and the recesses 300B are formed, may be elliptical when viewed from the Z-axis direction, or may be in the Z-axis direction. From the perspective, it may be L-shaped.

In the present embodiment, an example in which the concave portions are provided on both the fifth end surface and the sixth end surface of the base metal has been described. However, a concave portion is provided on either the fifth end surface or the sixth end surface of the base metal. It may be provided. When the base metal is configured in this way, the fixing jig can be fitted into the concave portion, and the base metal is processed as compared with the case where the concave portion is provided on both the fifth end surface and the sixth end surface of the base metal. Can be shortened.

Further, the position of the concave portion on the fifth end surface or the sixth end surface of the base metal is not limited to the illustrated example, but the second contact 42 is projected toward the second base metal 32 as shown in FIG. It is desirable to provide it at a position that overlaps the region and can fix the base metal with a fixing jig. By providing the concave portion at such a position, the distance from the second contact 42 to the fixed jig is shortened, and the vibration of the second metal base 32 when the vibration is applied can be suppressed. Therefore, the plastic flow of the second intermediate member 62 is performed in a short time, and the bonding strength can be increased.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

1 contact, 2 peeling mechanism, 3A 1st end face, 3B 2nd end face, 3C 3rd end face, 3D 4th end face, 3E 5th end face, 3F 6th end face, 6 fixed base, 6a movable part, 6a1, 6a2 fixed Jig, 6b fixed part, 8 pressure tool, 11 fixed contact, 12 movable contact, 31 first metal plate, 32 second metal plate, 41 first contact, 42 second contact, 61 first intermediate member, 62 Second intermediate member, 100 contactor, 200 ultrasonic welder, 300, 300A, 300B, 301 recess, 300a, 301a bottom surface, 300b, 301b step.

Claims

With the base metal,
A contact fixed to the base;
A conductive member provided between the base metal and the contact and having a hardness lower than the hardness of the contact and capable of plastic flow;
With
On the outer peripheral surface of the base metal, a recess is formed that is recessed in a direction perpendicular to the arrangement direction of the base metal, the conductive member, and the contact, and into which a jig provided in the movable part of the ultrasonic welding machine is fitted. A contactor characterized by.
The contactor according to claim 1, wherein a plurality of the recesses are formed on the outer peripheral surface.
The contactor according to claim 1 or 2, wherein a shape of the stepped portion forming the concave portion is a polygon of four or more squares.
The material of the contact is a sintered metal,
The material of the base metal is electrolytic copper or oxygen-free copper,
The contact according to any one of claims 1 to 3, wherein the conductive member is silver.
The contact according to any one of claims 1 to 4, wherein the concave portion is provided at a position overlapping with a region formed by projecting the contact toward the base metal.
A step of manufacturing a base metal in which a recess into which a jig provided in a movable part of an ultrasonic welding machine is fitted is formed on the outer peripheral surface;
Producing a contact fixed to the base metal;
Forming a conductive member on the contact having a hardness lower than that of the contact and capable of plastic flow;
Installing the base on a fixed base of the ultrasonic welder;
Inserting the jig into the recess formed in the base placed on the fixed base;
Installing the contacts on the base;
Applying ultrasonic vibration from the pressure tool of the ultrasonic welder to the contact;
The manufacturing method of the contactor characterized by including.
In the step of manufacturing the base metal, electrolytic copper or oxygen-free copper is used as a material of the base metal,
In the step of manufacturing the contact, sintered metal is used as the material of the contact,
The method of manufacturing a contact according to claim 6, wherein silver is used as a material of the conductive member in the step of forming the conductive member at the contact point.
The method of manufacturing a contact according to claim 6 or 7, wherein, in the step of manufacturing the base metal, the concave portion is provided at a position overlapping a region formed by projecting the contact point toward the base metal. .