JP2007122931A - Electric contact - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric contact equipped with a rivet contact having higher heat dissipating performance. <P>SOLUTION: In this electric contact 1 in which the leg part 4e of the rivet contact is inserted in a through hole 2 formed in a terminal plate 3, and the rivet contact 4 is caulked to be joined with the terminal plate 3 by crushing the tip part of the leg part 4e, the head part 4c of the rivet contact is caulked and fixed by pushingly deforming the periphery 3c of the head part 4c of the rivet contact on the surface side 3b of the terminal plate 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electrical contact.

  Conventionally, what is disclosed by patent document 1 is known as an electrical contactor used with a switch, a circuit breaker, etc. FIG.

The electric contact disclosed in Patent Document 1 includes a rivet contact and a terminal plate provided with a through hole. The foot of the rivet contact is inserted into the through hole, and the foot of the rivet contact is placed on the bottom surface. A rivet contact is fixed to the terminal board by applying a so-called caulking process in which pressure is applied from the side.
JP-A-5-242752

  In a switch or circuit breaker equipped with such an electrical contact, when a pair of electrical contacts are brought into and out of contact with each other to open and close an electric circuit, arc discharge may occur between the electrical contacts. Sometimes, the temperature of contact surfaces that have received heat due to arc discharge becomes high, which is one cause of welding of contact surfaces.

  Further, in the above-described conventional caulking, if a gap is generated between the bottom surface of the rivet contact head and the terminal plate surface due to processing failure or the like, the contact area between the rivet contact and the terminal plate is reduced, and the electric circuit The heat received on the contact surface by the arc discharge at the time of opening and closing becomes difficult to conduct from the contact surface to the terminal board side. In this case, the heat dissipation of the contact head deteriorates, heat is accumulated in the contact portion, and as a result, there is a possibility that the contact surfaces are likely to be welded due to a temperature rise.

  Then, an object of this invention is to obtain the electrical contactor provided with the rivet contact with higher heat dissipation.

  According to the first aspect of the present invention, the electric contact is obtained by inserting the foot portion of the rivet contact into a through hole formed in the terminal plate and crimping and joining the rivet contact to the terminal plate by crushing the tip portion of the foot portion. The rivet contact head is crimped and fixed by pressing and deforming the peripheral portion of the rivet contact head on the surface of the terminal board.

  The invention according to claim 2 is characterized in that a countersink portion for a rivet contact head is provided around the through hole of the terminal plate.

  In the invention of claim 3, a protruding wall portion is provided on the surface of the terminal plate along the periphery of the rivet contact head, and the protruding wall is pressed and deformed to fix the rivet contact head by caulking. Features.

  According to a fourth aspect of the present invention, the region on the through hole side of the surface of the terminal plate is protruded from the region opposite to the through hole from the protruding wall portion.

  In the invention of claim 5, before the rivet contact is caulked and joined to the terminal plate, the rivet contact head is pressed against the terminal plate while the leg portion of the rivet contact is inserted into the through hole. It is characterized in that the adhesiveness between the bottom surface of the rivet contact head and the bottom surface of the countersink portion is enhanced by rotating the head steadily.

  The invention according to claim 6 is characterized in that a close-contact auxiliary material is interposed between the bottom surface of the rivet contact head and the bottom surface of the countersink portion.

  The invention according to claim 7 is characterized in that at least one of the bottom surface of the rivet contact head and the bottom surface of the countersunk portion is an uneven surface comprising a large number of concave portions and convex portions.

  In the invention of claim 8, before the rivet contact is caulked and joined to the terminal plate, the rivet contact head is pressed against the terminal plate in a state where the foot portion of the rivet contact is inserted into the through hole. Thus, the adhesion between the bottom surface of the rivet contact head and the bottom surface of the countersink portion is enhanced.

  In the invention of claim 9, in the peripheral portion of the rivet contact head on the surface of the terminal plate, a section that is pressed and deformed along the periphery of the rivet contact head and a section that is not pressed and deformed are alternately provided. It is characterized by.

  In the invention of claim 10, a contact head that protrudes to the surface side of the terminal plate by inserting a rod-shaped contact member into a through hole formed in the terminal plate and crushing both axial ends of the contact member. And a contact member caulked and joined to the terminal board, wherein the contact head is crimped and deformed by pressing and deforming a peripheral portion of the contact head on the surface of the terminal board. To do.

  According to the first aspect of the present invention, the contact area between the terminal plate and the rivet contact can be increased as much as the rivet contact head is covered with the portion that is pressed and deformed around the rivet contact head. The heat dissipation to can be improved. Further, it is possible to suppress the rivet contact head from being separated from the surface of the terminal plate by an impact at the time of opening / closing the contact, or by heat generated by arc discharge or energization, thereby suppressing conduction failure and deterioration of heat dissipation performance.

  According to the invention of claim 2, the rivet contact head and the terminal plate can be more easily compared with the case where the countersink is not provided, because the side wall surface of the countersink can be brought into contact with the rivet contact head. The contact area with can be increased.

  According to the invention of claim 3, a structure in which the rivet contact head is caulked and fixed can be obtained more easily by pressing and deforming the protruding wall portion having relatively low rigidity.

  According to the invention of claim 4, by projecting the surface of the terminal plate on the through hole side from the projecting wall portion from the surface of the terminal plate opposite to the through hole (general surface of the terminal plate), the side opposite to the through hole The distance between the surface of the terminal plate and the contact surface can be increased, and damage to the terminal plate due to the heat of arc discharge can be suppressed.

  According to the fifth aspect of the present invention, it is possible to enhance the adhesion between the bottom surface of the rivet contact head and the bottom surface of the countersink portion, thereby enhancing the heat dissipation from the rivet contact to the terminal plate.

  According to the sixth aspect of the present invention, the adhesion between the bottom surface of the rivet contact head and the bottom surface of the counterboring portion is improved by the adhesion auxiliary material interposed between the bottom surface of the rivet contact head and the bottom surface of the counterboring portion. The heat dissipation from the rivet contact to the terminal board can be enhanced.

  According to the seventh aspect of the present invention, the uneven surface is deformed by pressing the rivet contact head and the terminal plate to improve the adhesion between the bottom surface of the rivet contact head and the bottom surface of the countersink, and the terminal from the rivet contact. The heat dissipation to the plate can be improved.

  According to the invention of claim 8, by pressing the rivet contact head with the foot portion of the rivet contact inserted into the through-hole before the caulking, the bottom surface of the rivet contact head and the countersink Adhesion with the bottom surface of the part can be improved, and heat dissipation from the rivet contact to the terminal board can be improved.

  According to the ninth aspect of the present invention, since a step is formed between the section to be pressed and deformed and the section not to be pressed and deformed, the step causes the rotation of the rivet contact head around the axis relative to the terminal plate, that is, the rivet. The rotation around the contact axis can be restricted.

  According to the invention of claim 10, even when the contact head is formed from the rod-shaped contact member, the contact area between the terminal plate and the contact can be increased, and the heat dissipation from the contact to the terminal plate is enhanced. Can do.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  (First Embodiment) FIG. 1 is a view showing a rivet contact and a terminal plate constituting an electric contact according to this embodiment, wherein (a) is a longitudinal sectional view, (b) is a perspective view, and FIG. (A) is a figure which shows the method to obtain the electrical contact concerning this embodiment, Comprising: (a) is a longitudinal cross-sectional view of the rivet contact and terminal board in the state which is squashing and crimping the rivet contact. b) is a longitudinal sectional view of the rivet contact and the terminal plate in a state where the peripheral portion of the rivet contact head on the surface of the terminal plate is pressed and deformed, and FIG. 3 shows the completed electric contact according to the present embodiment. It is a figure, (a) is a longitudinal cross-sectional view, (b) is a perspective view. In addition, a vertical cross section shall show the cross section containing the central axis of a rivet contact.

  The electrical contact 1 according to this embodiment includes a terminal plate 3 provided with a through hole 2 and a rivet contact 4.

  In the present embodiment, the rivet contact 4 is configured as a composite rivet contact. That is, the rivet contact 4 includes a substantially disc-shaped contact tip portion 4a having a relatively high electrical conductivity mainly composed of silver or the like and a substantially rivet-shaped base metal portion 4b mainly composed of copper or the like. It is obtained by joining by a method such as resistance welding or brazing.

  On the other hand, the terminal board 3 is comprised as a substantially flat member which has copper etc. as a main component. Here, the diameter of the through hole 2 provided in the terminal plate 3 is smaller than the diameter of the bottom surface 4d of the head 4c of the rivet contact 4, and is substantially the same as or slightly larger than the diameter of the foot 4e. A counterbore 5 is formed around the through hole 2. The diameter of the countersink portion 5 is slightly larger than the diameter of the bottom surface 4d of the head portion 4c, and when the foot portion 4e is inserted into the through hole 2, as shown in FIG. The part 4c is just fit in the counterbore part 5.

  In this embodiment, the electric contact 1 is obtained by inserting the foot part 4e of the rivet contact 4 into the through hole 2, and crushing and joining the tip part of the foot part 4e. Here, the caulking is a method in which a rod-shaped member is inserted into a through-hole formed in a member to be joined and pressed with a receiving member so as not to come out of the through-hole, and the tip is pressed and crushed with a punch or the like. This is a joining technique of fixing to a member to be joined. In the present embodiment, as shown in FIG. 2A, while the head 4c of the rivet contact 4 is pressed from above by the receiving member 6, the tip of the foot 4e is pressed from below by the punch 7, and the foot The crimped joint state is obtained by crushing the tip of the portion 4e.

  In this embodiment, after caulking and joining, as shown in FIG. 2B, the back surface 3a of the terminal board 3 (the surface opposite to the side on which the head 4c is disposed) 3a is used as the backing member 8. The peripheral portion 3c of the head portion 4c of the surface (the surface on which the head portion 4c is disposed) 3b of the terminal board 3 is deformed by being pressed by the pressing member 9, and the head portion 4c is caulked and fixed. . This caulking is performed using the backing member 8 and the pressing member 9. The backing member 8 is made of a hard material such as carbon steel, and as shown in FIG. 2B, a recess 8a for avoiding interference with a portion where the foot portion 4e is crushed is formed. . On the other hand, the pressing member 9 is made of a hard material such as carbon steel and has a recess 9a for avoiding interference with the head 4c. Further, a sharpened portion 9b is provided at the peripheral edge of the concave portion 9a. And while supporting the back surface 3a side of the terminal plate 3 with the backing member 8, the peripheral portion 3c of the head portion 4c of the surface 3b of the terminal plate 3 is pressed against the outer periphery of the head portion 4c. 3 is plastically deformed so as to fall down to the axial center side of the rivet contact 4, and is caulked and fixed so that the lower side surface of the head 4c is sandwiched by the plastically deformed terminal plate 3, as shown in FIG.

  Thereby, since the contact area of the terminal board 3 and the rivet contact 4 can be enlarged more, the heat dissipation of the rivet contact 4 can be improved.

  Further, the phenomenon that the head 4c is warped due to the difference in thermal expansion coefficient between the contact tip portion 4a and the base metal portion 4b, and the phenomenon that the peripheral portion of the head 4c and the terminal plate 3 are separated can be suppressed. 3 and the rivet contact 4 can be maintained in a large state.

  (Second Embodiment) FIG. 4 is a view showing a rivet contact and a terminal plate constituting an electric contact according to this embodiment, wherein (a) is a longitudinal sectional view, (b) is a perspective view, and FIG. (A) is a figure which shows the method to obtain the electrical contact concerning this embodiment, Comprising: (a) is a longitudinal cross-sectional view of the rivet contact and terminal board in the state which is squashing and crimping the rivet contact. b) is a longitudinal sectional view of the rivet contact and the terminal plate in a state where the peripheral portion of the rivet contact head on the surface of the terminal plate is pressed and deformed, and FIG. 6 shows the completed electric contact according to the present embodiment. It is a figure, (a) is a longitudinal cross-sectional view, (b) is a perspective view. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In the present embodiment, as shown in FIG. 4, on the surface 3 b of the terminal plate 3 </ b> A, an annular protruding wall portion 10 is provided at a position spaced apart from the periphery along the periphery of the through hole 2, while the terminal plate A recess 11 is formed around the through hole 2 on the back surface 3a of 3A. Here, the width of the annular region 5 a closer to the through hole 2 than the protruding wall 10 is the same as or slightly larger than the width of the bottom surface 4 d of the head 4 c of the rivet contact 4. That is, the region 5a corresponds to the bottom surface of the countersink portion 5, that is, the countersink surface, and the annular protruding wall portion 10 is disposed adjacent to the periphery of the head 4c of the rivet contact 4. .

  In this embodiment, after performing caulking and bonding similar to those in the first embodiment as shown in FIG. 5A, the back surface 3a of the terminal board 3A is turned back as shown in FIG. 5B. While pressing with the receiving member 8, the protruding wall portion 10 of the surface 3b of the terminal plate 3A is deformed by being pressed by the pressing member 9A, and the head portion 4c of the rivet contact 4 is caulked and fixed.

  At this time, in the present embodiment, the upper edge of the outer peripheral portion of the protruding wall portion 10 is pressed by the inner inclined surface 9c of the sharpened portion 9b of the pressing member 9A. By doing so, the protruding wall portion 10 is plastically deformed so as to fall down to the axial center side of the rivet contact 4 along the outer periphery of the head portion 4c, and the lower side portion of the head portion 4c is plastically deformed as shown in FIG. It is fixed by caulking so as to be sandwiched between the terminal plates 3A.

  Also according to this embodiment described above, since the contact area between the terminal plate 3A and the rivet contact 4 can be increased, the heat dissipation of the rivet contact 4 can be enhanced.

  The protruding wall portion 10 has a lower rigidity because it protrudes from the surface 3b of the terminal plate 3A with a predetermined width. Compared to the case where the surface 3b of the terminal plate 3A itself is plastically deformed, the pressing wall portion 10 has a smaller pressing force. It can be plastically deformed more easily. Further, there is also an advantage that a shape more suitable for the head 4c of the rivet contact 4 can be easily obtained because a small pressing force is sufficient.

  Moreover, as shown in FIG. 6, the arrangement | positioning space of an electrical contactor can be made small by accommodating the part which crushed the foot | leg part 4e in the recessed part 11 provided in the back surface 3a of 3 A of terminal boards.

  (Third Embodiment) FIG. 7 is a view showing an electric contact according to this embodiment, wherein (a) is a longitudinal sectional view of a rivet contact and a terminal plate, and (b) is a completed electric contact. FIG. 8 is a perspective view of a pair of electrical contacts in a state where arc discharge is generated between the electrical contacts. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the second embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In this embodiment, as shown to Fig.7 (a), the cyclic | annular area | region 5a by the side of the through-hole 2 from the protrusion wall part 10 of the surface 3b of the terminal board 3B is made into the area | region (surface 3b of the surface 3b) on the opposite side. It protrudes from the general surface 3d).

  And the electrical contact concerning this embodiment is formed by crimping joining and crimping fixation similarly to the said 2nd Embodiment.

  According to the above-described embodiment, the distance between the surface 4f of the rivet contact 4 and the general surface 3d of the terminal plate 3B (the amount of the region 5a serving as the counterbore surface is projected from the general surface 3d of the surface 3b). The contact head height can be increased.

  Therefore, even if arc discharge occurs between the electrical contacts when the pair of electrical contacts are brought into contact with each other, the contact head height is large, so the distance between the general surface 3d of the terminal board 3B and the arc 12 is large. As a result, the influence of heat caused by the arc discharge received on the terminal plate 3B is mitigated. As a result, damage to the terminal board due to the heat of arc discharge can be suppressed. Further, if the contact head height is large, there is also an advantage that the arc foot 12a is less likely to move from the surface 4f of the rivet contact 4 toward the terminal plate 3B.

  (Fourth Embodiment) FIG. 9 is a view showing a rivet contact and a terminal plate constituting an electric contact according to this embodiment, and (a) shows a state in which the rivet contact is inserted into a through hole of the terminal plate. (B) is a perspective view showing a state in which the rivet contact is pressed against the terminal plate and is relatively rotated, and (c) is a relative rotation between the bottom surface of the rivet contact head and the bottom surface of the countersink. It is a longitudinal cross-sectional view which shows the state which improved adhesiveness. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In the present embodiment, with the rivet contact 4 inserted into the through hole 2, as shown in FIG. 9B, a predetermined pressing force is applied and the rivet contact 4 is pressed against the terminal plate 3 to rotate relatively. It is characterized by letting. By this rotation, the bottom surface 4d of the head 4c and the bottom surface of the countersink portion 5 are made to conform to each other by friction, thereby improving the adhesion. Thereafter, caulking and caulking are performed in the same manner as in the first embodiment to form the electrical contact according to the present embodiment.

  According to the present embodiment described above, the contact area between the terminal plate 3 and the rivet contact 4 can be increased by increasing the adhesion between the bottom surface 4d of the head 4c and the bottom surface of the countersink portion 5, and therefore the rivet The heat dissipation of the contact 4 can be further improved.

  (Fifth Embodiment) FIG. 10 is a longitudinal sectional view of a rivet contact and a terminal plate in a state where silver plating as a close-up auxiliary material is applied to the upper part of the bottom surface of the counterbore according to this embodiment. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In the present embodiment, the silver plating layer 13 is formed on the upper portion of the bottom surface of the counterbore portion 5.

  Then, the rivet contact 4 is caulked and joined to the terminal board 3 in the same manner as in the first embodiment. At this time, since the silver plating layer 13 is soft, the silver plating layer 13 is deformed so as to fill a gap between the bottom surface 4d of the head 4c and the bottom surface of the countersink portion 5. That is, the silver plating layer 13 acts as an adhesion auxiliary material. Thereafter, the head 4c is caulked and fixed in the same manner as in the first embodiment to form an electrical contact.

  According to the above embodiment, the silver plating layer 13 fills the gap between the bottom surface 4d of the head 4c and the bottom surface of the countersink portion 5 to increase the adhesion, so that the contact from the rivet contact 4 to the terminal plate 3 is increased. Heat conduction is promoted, and the heat dissipation of the rivet contact 4 can be further enhanced.

  Furthermore, since silver has high conductivity, electrical conduction and heat conduction from the bottom surface 4d of the head 4c to the terminal plate 3 can be further promoted, and the heat dissipation of the rivet contact 4 can be further enhanced.

  (Sixth Embodiment) FIG. 11 is a perspective view of a rivet contact and a terminal plate constituting an electric contact according to this embodiment. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In the present embodiment, the bottom surface of the countersink portion 5 is knurled so that the bottom surface of the countersink portion 5 is an uneven surface 14 including a large number of concave portions and convex portions.

  Then, the rivet contact 4 is caulked and joined to the terminal board 3 in the same manner as in the first embodiment. At this time, the convex part of the concavo-convex surface 14 formed on the bottom surface of the countersink portion 5 by the knurling is deformed by the pressing force acting by caulking, and the bottom surface 4d of the head 4c and the bottom surface of the countersink portion 5 are deformed. Fill in the gaps between them. Thereafter, the head 4c is caulked and fixed in the same manner as in the first embodiment to form the electrical contact according to the present embodiment.

  According to the above embodiment, the uneven surface 14 is deformed by pressing the head portion 4c and the terminal plate 3, and the adhesion between the bottom surface 4d of the head portion 4c and the bottom surface of the countersink portion 5 can be enhanced. Therefore, the contact area between the terminal plate 3 and the rivet contact 4 can be increased, and the heat dissipation of the rivet contact 4 can be further increased.

  (Seventh Embodiment) FIG. 12 is a view showing a rivet contact and a terminal plate constituting an electric contact according to the present embodiment. FIG. 12 (a) shows a state in which the rivet contact head is pressed against the terminal plate. The longitudinal cross-sectional view shown, (b) is a longitudinal cross-sectional view which shows the state which the adhesiveness of the bottom face of a rivet contact head and the bottom face of a countersink part improved. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In this embodiment, as shown to Fig.12 (a), the pressing back receiving member 15 supports the back surface 3a of the terminal board 3, and the pressing member 16 is pressing the head 4c from upper direction. Here, the indentation backing member 15 is made of a hard material such as carbon steel, and has a recess 15a for avoiding interference with the foot 4e as shown in FIG. 12 (a). On the other hand, the pushing member 16 is made of a hard material such as carbon steel, and as shown in FIG. 12 (a), a recess 16a corresponding to the shape of the head 4c is formed. 16 b is formed so as to contact the surface 4 f of the rivet contact 4. And the recessed part 16c is formed in the center part of the bottom face 16b, and it is trying for the pushing member 16 and the center part of the surface 4f of the rivet contact 4 not to contact.

  Therefore, when the head 4c is pressed using the pushing member 16, only the peripheral portion of the surface 4f of the rivet contact 4 is pushed by the pushing member 16, and as shown in FIG. 12 (b), the bottom surface of the head 4c. A gap between 4d and the bottom surface of the counterbore 5 can be filled.

  Thereafter, caulking and caulking are performed in the same manner as in the first embodiment to form the electrical contact according to the present embodiment.

  According to the above embodiment, the gap between the bottom surface 4d of the head 4c and the bottom surface of the countersunk portion 5 is filled by being pressed by the pushing member 16, and the bottom surface 4d and the bottom surface of the countersink portion 5 are filled. Adhesion can be increased more easily, and thus heat dissipation of the rivet contact 4 can be increased more easily.

  (Eighth Embodiment) FIGS. 13A and 13B are diagrams showing an electrical contact according to the present embodiment, in which FIG. 13A is a perspective view of the completed electrical contact, and FIG. 13B is A in FIG. -A longitudinal sectional view, (c) is a BB longitudinal sectional view of FIG. 13 (a), and (d) is a CC planar sectional view of FIGS. 13 (b) and (c). Here, the flat cross section indicates a cross section perpendicular to the central axis of the rivet contact. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In this embodiment, after performing caulking and bonding similar to those in the first embodiment, the peripheral portion 3c of the head 4c of the front surface 3b of the terminal plate 3 is pressed while holding the back surface 3a of the terminal plate 3 with the backing member 8. The head 4c of the rivet contact 4 is caulked and fixed by being deformed by being pressed by a pressing member (not shown). A plurality (four in this embodiment) of concave portions are formed along the circumferential direction in the sharpened portion 9b of the pressing member (not shown). That is, the sharpened portion 9b is alternately formed with concave portions and convex portions along the circumferential direction. Therefore, when the head 4c is caulked and fixed using a pressing member (not shown), the outer periphery of the head 4c of the terminal board 3 is pressed and deformed along the periphery of the head 4c as shown in FIG. 13 (d). Four sections 17 are formed alternately with four sections 17 that are not pressed and deformed.

  Here, at the time of the pressure deformation, the section 17 of the terminal plate 3 which is pressed and deformed is plastically deformed so as to fall toward the axial center side of the rivet contact 4 along the outer periphery of the head 4c, and the head 4c Since the side surface is pushed in, a dent is formed on the side surface of the head 4c corresponding to the section 17 where the terminal plate 3 is pressed and deformed.

  On the other hand, the side surface of the head 4c corresponding to the section 18 of the terminal board 3 that is not pressed and deformed remains undeformed.

  Accordingly, as shown in FIG. 13 (d), a step is formed on the side surface of the head 4c along the circumferential direction at the boundary P between the section 17 pressed by the terminal plate 3 and the section 18 not pressed.

  According to the present embodiment described above, a step is formed along the circumferential direction on the side surface of the head 4c, so that the rotation of the head 4c around the axis with respect to the terminal plate 3, that is, the rotation of the rivet contact 4 around the axis. Movement can be regulated. As a result, the separation between the foot 4e and the through hole 2 due to the rotation is suppressed, and poor contact between the foot 4e and the through hole 2 is less likely to occur.

  (Ninth Embodiment) FIG. 14 is a view showing an electrical contact according to this embodiment, wherein (a) is a longitudinal section of the contact member and the terminal plate in a state where the contact member is inserted into the through hole of the terminal plate. FIG. 4B is a longitudinal sectional view of the contact head and the terminal plate in a state where the contact head is formed by squeezing both axial ends of the contact member, and FIG. It is a longitudinal cross-sectional view of a contactor. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In this embodiment, as shown in FIG. 14A, a rod-shaped contact member 19 is used. Moreover, the lower part of the through-hole 2 provided in terminal board 3D is expanded in diameter toward the downward direction. Then, the contact member 19 is inserted into the through hole 2 and, as shown in FIG. 14B, the receiving member 6D is pressed against the upper end portion of the contact member 19, while the punch 7 is pressed against the lower end portion. By compressing, the upper end portion is deformed so that the head portion 4c is formed, and the lower end portion is deformed so as to fill the enlarged diameter portion. That is, in this embodiment, the rivet contact 4D is formed by the compression, and the rivet contact 4D is caulked and joined to the terminal plate 3D.

  Thereafter, the head 4c is caulked and fixed in the same manner as in the first embodiment to form the electrical contact according to the present embodiment.

  According to the above embodiment, even when the head portion 4c of the rivet contact 4D is formed from the rod-shaped contact member 19, the contact area between the terminal plate 3D and the rivet contact 4D can be increased, and the rivet contact 4D. The heat dissipation from the terminal board 3D can be improved.

  (Tenth Embodiment) FIG. 15 is a view showing an electrical contact according to this embodiment, wherein (a) is a longitudinal section of the contact member and the terminal plate in a state where the contact member is inserted into the through hole of the terminal plate. FIG. 5B is a longitudinal sectional view of the contact head and the terminal plate in a state where the contact heads are formed at both ends by squeezing both axial ends of the contact member, and FIG. FIG. The electrical contact according to the present embodiment includes the same components as those of the electrical contact according to the first embodiment. Therefore, the same constituent elements are denoted by common reference numerals, and redundant description is omitted.

  In the present embodiment, as shown in FIG. 15A, counterbore portions 5 </ b> E are provided on both surfaces 3 e of the terminal board 3 </ b> E, and the rod-shaped contact member 19 is inserted into the through hole 2. And as shown in FIG.15 (b), the axial direction both ends of the contact member 19 are received by member 6D, and the head 4c is formed in both ends. And the crimping joining is made | formed by forming the both-ends contact 20 which has the head 4c in this both ends. Thereafter, the peripheral portion 3c of the head portion 4c formed on both surfaces 3e of the terminal board 3E is pressed and deformed to fix the double-sided contacts 20 by caulking, thereby forming the electrical contact according to the present embodiment.

  According to the above-described embodiment, even when the double-ended contact 20 is formed, the contact area between the terminal plate 3E and the double-ended contact 20 can be increased, so that heat dissipation from the double-ended contact 20 to the terminal plate 3E is further improved. Can do.

  The preferred embodiments of the electrical contact according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various embodiments can be adopted without departing from the gist.

  For example, a rivet contact may be used in place of the composite rivet contact in the first to eighth embodiments.

  Moreover, in the said 1st Embodiment, although the countersink part was provided in the surface of the terminal board, it is not necessary to provide a countersink part.

  Further, in the fifth embodiment, silver plating is applied as a close-contact auxiliary material on the bottom surface of the counterboring portion. However, the plating may be performed on the bottom surface side of the rivet contact head or the counterboring portion. You may give to both the upper part of the bottom face of this, and the bottom face part of a rivet contact head. Furthermore, the adhesion auxiliary material is not limited to silver plating, and various materials can be used as long as the adhesion between the upper portion of the bottom surface of the countersink portion and the bottom surface portion of the rivet contact head can be enhanced.

  In the sixth embodiment, a large number of concave portions and convex portions are formed by knurling the upper portion of the bottom surface of the counterbored portion. However, this processing is performed on the bottom surface portion of the rivet contact head. Alternatively, it may be applied to both the bottom surface of the counterbored portion and the bottom surface of the rivet contact head.

  Moreover, the shape of the pushing member used in the said 7th Embodiment presses a rivet contact head to a terminal board, and can improve the adhesiveness of the bottom face of a countersink part, and the bottom face of a rivet contact head. Various shapes are possible.

  Further, in the eighth embodiment, a recess is formed in the sharp part of the pressing member so as to provide a section that is not pressed and deformed in the peripheral part of the rivet contact head, but a groove is formed in the outer periphery of the countersink part. Alternatively, a section that is not pressed and deformed may be provided in the peripheral portion of the rivet contact head by forming a recess in the annular protruding wall.

It is a figure which shows the rivet contact and terminal plate which comprise the electric contact concerning 1st Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view, (b) is a perspective view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the method to obtain the electrical contact concerning 1st Embodiment of this invention, Comprising: (a) is a longitudinal cross-section of the rivet contact and terminal board in the state which is squashing and crimping | joining the rivet contact foot FIG. 4B is a longitudinal sectional view of the rivet contact and the terminal plate in a state where the peripheral portion of the rivet contact head on the surface of the terminal plate is pressed and deformed. It is a figure which shows the completed electrical contact concerning 1st Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view, (b) is a perspective view. It is a figure which shows the rivet contact and terminal board which comprise the electric contact concerning 2nd Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view, (b) is a perspective view. It is a figure which shows the method of obtaining the electrical contact concerning 2nd Embodiment of this invention, Comprising: (a) is a longitudinal cross-section of a rivet contact and a terminal board in the state which crushed the foot part of the rivet contact and joined by crimping FIG. 4B is a longitudinal sectional view of the rivet contact and the terminal plate in a state where the peripheral portion of the rivet contact head on the surface of the terminal plate is pressed and deformed. It is a figure which shows the completed electric contact concerning 2nd Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view, (b) is a perspective view. It is a figure which shows the electrical contact concerning 3rd Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view of a rivet contact and a terminal board, (b) is a longitudinal cross-sectional view of the completed electrical contact. The perspective view of a pair of electrical contact in the state which the arc discharge generate | occur | produced between the electrical contacts concerning 3rd Embodiment of this invention. It is a figure which shows the rivet contact and terminal plate which comprise the electric contact concerning 4th Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view which shows the state which inserted the rivet contact into the through-hole of the terminal plate, (b) ) Is a perspective view showing a state of relative rotation while pressing the rivet contact against the terminal plate, and FIG. 7C is a state in which adhesion between the bottom surface of the rivet contact head and the bottom surface of the countersink is improved by relative rotation. FIG. The longitudinal cross-sectional view of the rivet contact and terminal plate in the state by which the silver plating as a close_contact | adherence auxiliary | assistance material is given to the upper part of the bottom face of the counterbore part concerning 5th Embodiment of this invention. The perspective view of the rivet contact and terminal plate which comprise the electrical contact concerning 6th Embodiment of this invention. It is a figure which shows the rivet contact and terminal plate which comprise the electric contact concerning 7th Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view which shows the state which is pressing the rivet contact head against a terminal plate, b) A longitudinal sectional view showing a state in which the adhesiveness between the bottom surface of the rivet contact head and the bottom surface of the countersink portion is increased. It is a figure which shows the completed electrical contact concerning 8th Embodiment of this invention, Comprising: (a) is a perspective view of the completed electrical contact, (b) is AA longitudinal cross-section of Fig.13 (a). (C) is a BB longitudinal cross-sectional view of FIG. 13 (a), (d) is CC plane cross-sectional view of FIG.13 (b) and (c). It is a figure which shows the electrical contact concerning 9th Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view of a contact member and a terminal board in the state which inserted the contact member in the through-hole of the terminal board, (b) is A longitudinal sectional view of the contact head and the terminal plate in a state in which both ends in the axial direction of the contact member are crushed to form a contact head and crimped, (c) is a longitudinal sectional view of the completed electric contact . It is a figure which shows the electrical contact concerning 10th Embodiment of this invention, Comprising: (a) is a longitudinal cross-sectional view of a contact member and a terminal board in the state which inserted the contact member in the through-hole of the terminal board, (b) is A longitudinal sectional view of the contact head and the terminal plate in a state in which both ends in the axial direction of the contact member are crushed to form the contact head at both ends and crimped, (c) is a longitudinal section of the completed electrical contact Plan view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrical contact 2 Through-hole 3 Terminal board 3b Surface 3c Peripheral part 4 Rivet contact 4c Head part 4d Bottom surface 4e Foot part 5 Counter-sink part 5a Area 10 Projection wall part 13 Silver plating layer (adhesion auxiliary material)
14 Concavity and convexity 17 Section (Press deformation section)
18 sections (sections that are not deformed by pressing)
19 Contact members

Claims (10)

In the electric contact that inserts the foot portion of the rivet contact into the through hole formed in the terminal plate and crimps and joins the rivet contact to the terminal plate by crushing the tip portion of the foot portion,
An electric contact characterized in that a peripheral portion of a rivet contact head on the surface of the terminal plate is pressed and deformed to fix the rivet contact head by caulking.   The electric contact according to claim 1, wherein a countersink portion for a rivet contact head is provided around a through hole of the terminal plate.   3. A protruding wall portion is provided on the surface of the terminal plate along the periphery of the rivet contact head, and the protruding wall is pressed and deformed to fix the rivet contact head by caulking. The electrical contact according to.   The electric contact according to claim 3, wherein a region closer to the through hole than the protruding wall portion on the surface of the terminal plate is protruded from a region opposite to the through hole.   Before the rivet contact is caulked and joined to the terminal plate, the rivet contact head can be rotated relatively while pressing the rivet contact head against the terminal plate with the rivet contact foot inserted into the through hole. The electrical contact according to any one of claims 2 to 4, wherein adhesion between the bottom surface of the portion and the bottom surface of the countersink portion is enhanced.   The electrical contact according to any one of claims 2 to 5, wherein a close-contact auxiliary material is interposed between a bottom surface of the rivet contact head and a bottom surface of the counterbore portion.   6. At least one of the bottom surface of the rivet contact head and the bottom surface of the counterbored portion is an uneven surface comprising a large number of concave portions and convex portions. The electrical contact according to.   Before caulking and joining the rivet contact to the terminal plate, the rivet contact head is pressed against the bottom of the rivet contact head by pressing the rivet contact head against the terminal plate with the foot of the rivet contact inserted into the through hole. The electrical contactor according to any one of claims 2 to 7, wherein adhesion to the bottom surface of the part is enhanced.   The section of the rivet contact head on the surface of the terminal plate is alternately provided with a section that is pressed and deformed along the periphery of the rivet contact head and a section that is not pressed and deformed. The electrical contact according to any one of them. A rod-shaped contact member is inserted into a through-hole formed in the terminal plate, and a contact head protruding to the surface side of the terminal plate is formed by crushing both axial ends of the contact member, and the contact member is connected to the terminal. An electrical contact that is caulked and joined to a plate,
An electrical contactor characterized in that the contact head is crimped and fixed by pressing and deforming a peripheral portion of the contact head on the surface of the terminal board.

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