JP2018181593A - Conduction fixing pin and conduction fixing method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive conduction fixing pin having high versatility, and capable of conducting and fixing multiple electrically conductive members reliably and appropriately by easy mounting work.SOLUTION: A conduction fixing pin 1 is constituted of a resin pin body 10, and a conductive elastomer 20 mounted on the outer periphery of the pin body 10. The pin body 10 is constituted of a shaft 11, a head 12 formed at one end of the shaft 11, and a hook 13 having a snap fitting function formed at the other end of the shaft 11. The elastomer 20 is constituted of a first elastic part 21 arranged on the head 12 side, and a second elastic part 22 arranged on the hook 13 side. The first elastic part 21 has such a shape as having a larger wound diameter than the second elastic part 22 at at least the end on the second elastic part 22 side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a conduction fixing pin for fixing a plurality of conductive members in a state of being electrically connected, and a conduction fixing method for a plurality of conductive members using the conduction fixing pin.

  Conventionally, as means for fixing a heat sink closely attached to an electronic component such as LSI (Large Scale Integration) to a printed wiring board on which the electronic component is mounted, there is provided a leaf spring pressed against the surface of the heat sink; There is known a combination of a rivet or a screw that fixes both ends to a printed wiring board (see, for example, Patent Document 1).

  Further, as means for fixing the printed wiring board to the chassis of the electric device, a combination of a main body integrally molded using a resin and a conductive member integrally molded using a plate material having conductivity is used. Conventionally known (see, for example, Patent Document 2).

Unexamined-Japanese-Patent No. 2006-294952 JP, 2009-064906, A

  However, the fixing means of the heat sink described in Patent Document 1 is likely to cause inconveniences such as breakage of the package of the electronic component because the tightening force of the heat sink by the rivet or screw tends to be excessive. When a screw is used as a fixing means of the heat sink, the occurrence of such a problem can be prevented or suppressed by managing the tightening torque, but depending on the on / off of the power supply to the electronic component, the heat sink and the screw Since the stress based on the thermal expansion difference acts on the screw repeatedly, another problem that the screw is easily loosened tends to occur. Furthermore, when using rivets or screws as fixing means for the heat sink, there is also a problem that it is difficult to efficiently carry out the fixing work of the heat sink on the printed wiring board because the rivet caulking operation or screw tightening operation is required. .

  On the other hand, the fixing means of the printed wiring board described in Patent Document 2 is expensive because the configurations of the main body and the conductive member are complicated. Further, the fixing means of the printed wiring board described in Patent Document 2 slides the main body in the surface direction of the chassis after inserting the clamping pieces formed on the main body into the non-circular mounting holes formed in the chassis. Otherwise, the holding pieces can not be engaged with the chassis, and therefore, the invention can not be applied to fixing a heat sink to a chassis having a circular attachment hole or a printed wiring board, which is poor in versatility.

  The present invention has been made to solve the problems of the prior art, and the object thereof is to make the plurality of conductive members reliable and appropriate with low cost, high versatility, and simple attachment operation. It is an object of the present invention to provide a conduction fixing pin which can be electrically connected and fixed, and a conduction fixing method of a plurality of conductive members using the conduction fixing pin.

  In order to solve the problems of the prior art as described above, the present invention relates to a conductive fixing pin, which comprises a resin pin body and a conductive elastic body attached to the outer periphery of the pin body, and the pin The main body includes a shaft, a head larger than the shaft formed at one end of the shaft, and a hook having a snap fit function formed at the other end of the shaft. The elastic body includes a first elastic portion disposed on the head side and a second elastic portion disposed on the hook portion, and the whole is integrally configured with a coil spring. The winding diameter of the first elastic portion is larger than that of the second elastic portion at least at an end portion of the second elastic portion.

  Further, the present invention relates to a method of electrically connecting and fixing, by using the electrically conductive fixing pin, electrically connecting the first conductive member in which the first mounting hole is opened and the second conductive member in which the second mounting hole is opened. And the conductive fixing pin comprises a resin pin body and a conductive elastic body attached to the outer periphery of the pin body, and the pin body is A shaft portion, a head larger than the shaft portion formed at one end of the shaft portion, and a hook portion having a snap fit function formed at the other end of the shaft portion are integrally formed. The elastic body has a first elastic portion disposed on the head side and a second elastic portion disposed on the hook portion, and the whole is integrally configured with a coil spring. The first elastic portion is at least at an end on the second elastic portion side. The winding diameter is larger than that of the second elastic portion, and the first attachment hole is a circular hole having a diameter such that the first elastic portion can not be inserted and the second elastic portion can be inserted. The hole is a circular hole having a diameter such that the second elastic portion can not be inserted, and in a state where the center of the first mounting hole and the center of the second mounting hole are aligned, (2) The conductive members are vertically disposed, and the shaft portion of the conductive fixing pin is pushed into the first mounting hole and the second mounting hole from the upper surface side of the first conductive member, and the lower surface of the second conductive member The hook portion of the conductive fixing pin is penetrated on the side to abut the hook portion to the lower surface of the second conductive member, and the lower end portion of the first elastic portion is resiliently connected to the upper surface of the first conductive member And that the lower end portion of the second elastic portion is in elastic contact with the upper surface of the second conductive member. To.

  According to the above configuration, after the elastic body is attached to the pin main body, the shaft portion of the pin main body is inserted through the first attachment hole opened in the first conductive member and the second attachment hole opened in the second conductive member By doing so, the first and second conductive members can be fixed in an electrically conductive state. That is, the first and second conductive members are stacked one on top of the other with the first conductive member at the top, and with the center of the first mounting hole aligned with the center of the second mounting hole. When the shaft portion of the pin main body is inserted in series into the first and second mounting holes, the hook portion formed at the tip of the shaft portion passes through the second mounting hole formed in the second conductive member Is hooked to the lower surface of the second conductive member. At this time, the upper end portion of the first elastic portion is in elastic contact with the head of the pin body, the lower end portion of the first elastic portion is in elastic contact with the upper surface of the first conductive member, and the lower end portion of the second elastic portion is 2 Elastically contact the top surface of the conductive member. Thus, the first and second conductive members are fixed by the spring force of the elastic body, and the first conductive member and the second conductive member are electrically conducted.

  Therefore, according to the above configuration, by appropriately selecting the spring force of the elastic body, when the above configuration is applied as a fixing means of the heat sink to the printed wiring board, an excessive tightening force acts on the electronic component. This can prevent the occurrence of inconveniences such as breakage of the package. Further, since the first and second mounting holes formed in the first and second conductive members may be simple circular holes, the cost of manufacturing each conductive member can be reduced. Furthermore, according to the above configuration, since no screw is used, problems such as loosening of the screw can not occur. In addition, according to the above configuration, not only application to conduction and fixation of the heat sink to the printed wiring board, but also application to conduction and fixation of the two printed wiring boards, the versatility is excellent.

  Further, according to the present invention, in the conduction fixing pin of the above configuration, the first elastic portion is a conical coil spring in which the winding diameter on the second elastic portion side is large and the winding diameter decreases toward the head side. The second elastic portion is a compression coil spring having a constant winding diameter, and the maximum winding diameter of the conical coil spring constituting the first elastic portion is the winding of the compression coil spring constituting the second elastic portion. It is characterized in that it is formed larger than the diameter.

  According to the above configuration, since the first elastic portion is configured by the conical coil spring, the contact height of the first elastic portion can be reduced compared to the case where the first elastic portion is configured by the compression coil spring. It is possible to reduce the thickness of the structure composed of the elastic members.

  Further, according to the present invention, in the conduction fixing pin of the above-mentioned configuration, the shaft portion is formed with an engagement recess for engaging one end of the first elastic portion at an end portion on the head side. The elastic portion is characterized in that an engagement portion engaged with the engagement concave portion is formed at an end portion on the head side.

  According to the above configuration, after the elastic body is attached to the pin main body, the engaging portion formed at one end of the first elastic portion is engaged with the engaging recess formed in the pin main body. The body is unlikely to come off, and the work of fixing the conductive member using the conductive fixing pin can be made efficient.

  Further, according to the present invention, in the conductive fixing method of the above configuration, a ring-shaped spacer having an inner diameter capable of penetrating the hook portion of the conductive fixing pin is provided between the first conductive member and the second conductive member. The first mounting hole and the second mounting hole are concentrically disposed, and the conduction fixing pin is serially inserted through the first mounting hole, the center hole of the spacer, and the second mounting hole. The first conductive member, the spacer, and the second conductive member may be integrally fixed.

  According to the above configuration, since the spacer can be disposed so as not to fall off between the first conductive member and the second conductive member, it can be applied to, for example, fixing two printed wiring boards on which electronic components are mounted.

  According to the present invention, it is possible to provide a low cost, highly versatile, conductive fixing pin that can reliably and appropriately conduct and fix a plurality of conductive members with a simple attachment operation. Another object of the present invention is to provide a conductive fixing method by which a plurality of conductive members can be easily and reliably and properly conducted and fixed using this conductive fixing pin.

It is an exploded perspective view of a conduction fixed pin concerning an embodiment. It is a perspective view of the assembly state of the conduction | electrical_connection fixation pin which concerns on embodiment. It is a perspective view which shows the conduction | electrical_connection fixation method of the printed wiring board and heat sink which used the conduction fixed pin which concerns on embodiment. FIG. 5 is an enlarged cross-sectional view of a portion A of FIG. 4; It is a perspective view which shows the conduction | electrical_connection fixation method of two printed wiring boards using the conduction fixed pin which concerns on embodiment. It is a principal part expanded sectional view of two printed wiring boards electrically conducted and fixed using a conduction fixed pin concerning an embodiment.

  Hereinafter, the conduction fixing pin according to the embodiment and the conduction fixing method using the same will be described based on the drawings.

  As shown in FIG. 1, the conduction fixing pin 1 according to the embodiment includes a resin pin body 10 and a conductive elastic body 20 attached to the outer periphery of the pin body 10. The conduction fixing pin 1 according to the embodiment shown in FIG. 1 can be applied to conduction and fixation of a printed wiring board and a heat sink, and conduction and fixation of two printed wiring boards. In the present specification, “conducting and fixing” means fixing two conductive members (for example, a printed wiring board and a heat sink, or two printed wiring boards) in a state of being electrically conducted. .

  The pin main body 10 has a cylindrical shaft 11, a head 12 larger than the shaft 11 formed at one end of the shaft 11, and a hook 13 formed at the other end of the shaft 11. have.

  An engagement recess 11 a for engaging one end of the elastic body 20 is formed at an end of the shaft portion 11 on the head 12 side. The engagement recess 11 a is formed with a constant width and depth in the circumferential direction of the shaft 11.

  The hook portion 13 includes a connecting portion 14 extending from the tip of the shaft portion 11 and an arrow-shaped portion 15 formed at the tip of the connecting portion 14. The arrow-shaped portion 15 is formed so as to be elastically deformable in the direction approaching the connecting portion 14 and in the direction separating from the connecting portion, and has a snap fit function. Further, on the end side of the arrow-shaped portion 15 (the side facing the tip end of the shaft portion 11), the anti-slip projection 16 is protruded toward the tip end side of the shaft portion 11. Accordingly, the arrow-shaped portion 15 of the pin body 10 has a function of holding a conductive member described later by the end face 15a on the distal side and the outer surface 16a of the anti-slip projection 16.

  The pin main body 10 is integrally formed of, for example, a synthetic resin material such as polypropylene resin. As a method of manufacturing the pin body 10, for example, an injection molding method can be used.

  As shown in FIG. 2, when the elastic body 20 is attached to the pin body 10, the first elastic portion 21 disposed on the head 12 side of the pin body 10 and the second elasticity disposed on the hook portion 13 side The first and second elastic parts 21 and 22 are integrally configured using a single wire.

  The first elastic portion 21 is configured by a conical coil spring in which the winding diameter on the second elastic portion 22 side is large and the winding diameter decreases as it reaches the head portion 12 side of the pin main body 10. Is constituted by a compression coil spring having a constant winding diameter. The maximum winding diameter of the conical coil spring constituting the first elastic portion 21 is larger than the winding diameter of the compression coil spring constituting the second elastic portion 22. Further, an end of the first elastic portion 21 on the head 12 side is a first engaging portion 21 a having a winding diameter that can be engaged with the engaging recess 11 a formed in the shaft portion 11. On the other hand, the end of the second elastic portion 22 opposite to the first elastic portion 21 is a second engaging portion 22a having a winding diameter engageable with the end face 15a of the arrow-shaped portion 15 .

  In addition, the elastic body 20 which concerns on embodiment is not limited to what consists of a combination of a conical coiled spring and a compression coiled spring. That is, the elastic body 20 according to the embodiment has the first elastic portion 21 and the second elastic portion 22, and the first elastic portion 21 at least at the end portion on the second elastic portion 22 side is the second elastic portion 22. The winding diameter may be larger than that, and a combination of conical coil springs or a combination of compression coil springs may be used.

  The elastic body 20 is preferably formed using a metal wire such as a stainless steel wire which is excellent in weather resistance and durability. Further, the elastic body 20 is a coating obtained by covering the surface of a base material made of a metal wire such as stainless steel or the like having excellent weather resistance and durability so as to increase the conductivity, a metal material having an excellent conductivity such as copper. It can also be molded using a lead.

  The elastic body 20 is attached to the pin main body 10 by inserting the hook portion 13 of the pin main body 10 into the elastic body 20 from the first elastic portion 21 side of the elastic body 20 and forming the end of the first elastic portion 21 The first engaging portion 21a is engaged with the engaging recess 11a formed in the shaft portion 11 of the pin main body 10, and the second engaging portion 22a formed at the end of the second elastic portion 22 is pinted This can be done by engaging the end face 15a formed on the arrow-shaped portion 15 of the main body 10. As described above, in the conductive fixing pin 1 according to the embodiment, the elastic body 20 can be stably attached to the pin main body 10, so that the elastic body 20 does not fall off from the pin main body 10 during operation. Can exhibit high workability.

  Next, a method of fixing the conductive member using the conductive fixing pin 1 configured as described above will be described.

  3 and 4 show a printed wiring board (second conductive member) 32 on which the electronic component 31 is mounted using the conduction fixing pin 1 according to the embodiment, and a heat sink (on the upper surface of the electronic component 31) A conductive fixing method of conducting and fixing the first conductive member 33) is shown.

  Examples of the electronic component 31 requiring installation of the heat sink 33 generally include an LSI and a CPU (Central Processing Unit), but are not limited thereto. The heat sink 33 dissipates the heat generated by the electronic component 31 due to the current flow, and is integrally formed of a metal material having high thermal conductivity such as aluminum. In the heat sink 33 according to the embodiment, a rectangular substrate portion 35 in which the first attachment holes 34 for attaching the conduction fixing pin 1 are opened at both ends, and a plurality of radiation fins 36 vertically erected from one surface of the substrate portion 35 And are formed from. As the first attachment hole 34, a circular hole having a diameter such that the first elastic portion 21 of the elastic body 20 can not be inserted and the second elastic portion 22 of the elastic body 20 can be inserted.

  The printed wiring board 32 has a required conductive pattern formed on the surface of the insulating substrate 41. In the printed wiring board 32 according to the embodiment, a conductive pattern including a circular ground terminal 42 is formed. Further, in the printed wiring board 32 according to the embodiment, a second mounting hole 43 for attaching the conduction fixing pin 1 is formed in the formation portion of the ground terminal 42 and concentrically with the ground terminal 42. As the second mounting hole 43, a circular hole having a diameter that can not be inserted into the second elastic portion 22 of the elastic body 20 is opened.

  When conducting and fixing the printed wiring board 32 and the heat sink 33, first, the heat sink 33 disposed on the upper surface of the electronic component 31 is positioned, and the center of the first mounting hole 34 and the center of the second mounting hole 43 Match Thus, the heat sink 33 and the printed wiring board 32 are vertically disposed at an interval corresponding to the thickness of the electronic component 31 with the heat sink 33 upward.

  Next, the shaft portion 11 of the conduction fixing pin 1 mounted with the elastic body 20 is inserted into the first mounting hole 34 and the second mounting hole 43 from the upper side of the heat sink 33 and formed at the tip of the shaft portion 11 The hook portion 13 is penetrated to the lower surface side of the printed wiring board 32. The insertion of the conductive fixing pin 1 into the first mounting hole 34 and the second mounting hole 43 can be performed by the operator pressing the head 12 of the conductive fixing pin 1 with a finger. When the conductive fixing pin 1 is inserted into the first mounting hole 34 and the second mounting hole 43, the second elastic portion of the elastic body 20 is in contact with the upper surface of the printed wiring board 32. Therefore, after the second elastic portion abuts on the upper surface of the printed wiring board 32, the spring force of the elastic body 20 acts on the conduction fixing pin 1.

  When the conductive fixing pin 1 is further pushed against the spring force of the elastic body 20, the hook portion 13 is disposed on the lower surface side of the printed wiring board 32 through the second attachment hole 43. When the hook portion 13 is inserted into the second mounting hole 43, the hook portion 13 is pushed by the hole surface of the second mounting hole 43 and elastically deforms inward. Further, the hook portion 13 is elastically deformed outward by its own spring force at the stage of penetrating the second attachment hole 43. Therefore, in the state where the hook portion 13 penetrates the second attachment hole 43, the end face 15 a of the arrow-shaped portion 15 is snap-fitted to the lower surface of the printed wiring board 32 by the spring force of the elastic body 20.

  Further, in this state, the outer surface of the shift preventing protrusion 16 formed on the end face 15 a of the arrow-shaped portion 15 is disposed opposite to the hole surface of the second mounting hole 43, and the position of the printed wiring board 32 with respect to the conduction fixing pin 1. Deviation is prevented.

  Furthermore, in this state, the first elastic portion 21 of the elastic body 20 is resiliently in contact with the conductive heat sink 33 made of aluminum or the like, and the second elastic portion 22 of the elastic body 20 is on the upper surface of the printed wiring board 32 Since it is elastically connected to the formed ground terminal 42, the heat sink 33 and the ground terminal 42 are electrically conducted. Thereby, since the heat sink 33 and the electronic component 31 have the same potential, it is possible to prevent the destruction of the electronic component 31 and the generation of noise due to the charging of the heat sink 33.

  FIG.5 and FIG.6 is the electroconductive fixing which electrically connects and fixes the printed wiring board 50 (1st electroconductive member) and the printed wiring board (2nd electroconductive member) 60 using the conduction fixed pin 1 which concerns on embodiment. Shows how.

  Unlike the printed wiring board 32, the printed wiring boards 50 and 60 have circular ground terminals 51 and 61 formed at the four corners of the upper surface. Then, in a portion where the ground terminal 51 is formed, a first attachment hole 52 for attaching the conduction fixing pin 1 is opened concentrically with the ground terminal 51. On the other hand, in a portion where the ground terminal 61 is formed, a second attachment hole 62 for attaching the conduction fixing pin 1 is opened concentrically with the ground terminal 61. In addition, although illustration is abbreviate | omitted, the required electronic component is mounted in the printed wiring boards 50 and 60, respectively.

  As the first attachment hole 52, a circular hole having a diameter such that the first elastic portion 21 of the elastic body 20 can not be inserted and the second elastic portion 22 of the elastic body 20 can be inserted. In addition, as the second mounting hole 62, a circular hole having a diameter that can not be inserted into the second elastic portion 22 of the elastic body 20 is opened.

  The printed wiring boards 50 and 60 are electrically connected and fixed by the conductive fixing pin 1 according to the embodiment via the ring-shaped spacer 70. The spacer 70 is formed of a resin material in a ring shape having an inner diameter through which the second elastic portion 22 of the elastic body 20 can be inserted.

  The conduction fixing method of the printed wiring boards 50 and 60 is substantially the same as the conduction fixing method of the printed wiring board 32 and the heat sink 33. That is, when conducting and fixing the printed wiring boards 50 and 60, first, after interposing the spacer 70 between the printed wiring board 50 and the printed wiring board 60, the first mounting hole 52 and the center hole of the spacer 70 The center of the second mounting hole 62 is aligned. Thereafter, from above the printed wiring board 50, the shaft portion 11 of the conduction fixing pin 1 in which the elastic body 20 is attached to the first mounting hole 52, the center hole of the spacer 70 and the second mounting hole 62 is inserted in series. The hook portion 13 formed at the tip of the shaft portion 11 is penetrated to the lower surface side of the printed wiring board 60. Thereby, conduction and fixation of the printed wiring boards 50 and 60 can be completed.

  Hereinafter, the effects of the conduction fixing pin 1 according to the embodiment and the conduction fixing method using the same will be described.

The conduction fixing pin 1 according to the embodiment includes the resin pin body 10 and the conductive elastic body 20 attached to the outer periphery of the pin body 10, and utilizes the spring force of the elastic body 20 to make the pin The main body 10 is configured to conduct and fix the first and second conductive members (the printed wiring board 32 and the heat sink 33, or the two printed wiring boards 50 and 60).
Therefore, the conductive fixing pin 1 according to the embodiment can prevent the occurrence of inconvenience such as breakage of the package of the electronic component 31 by appropriately selecting the spring force of the elastic body. Also, since no screws or rivets are used, the problem of loosening does not occur even over a long period.

The conduction fixing pin 1 according to the embodiment inserts the resin pin body 10 into the first and second mounting holes 34, 43 (or 52, 62) opened in the first and second conductive members. It has the structure which can complete conduction and fixation of the 1st and 2nd conductive member only by doing.
Therefore, the conductive fixing pin 1 according to the embodiment can efficiently perform the conductive fixing operation of the first and second conductive members as compared with the case of using a screw or a rivet. In addition, since the conductive fixing pin 1 according to the embodiment can make the first and second mounting holes 34, 43 (or 52, 62) simple circular holes, the cost of manufacturing each conductive member can be reduced. Can be Furthermore, since the conduction fixing pin 1 according to the embodiment can be applied not only to conduction and fixation of the printed wiring board 32 and the heat sink 33 but also to conduction and fixation of the two printed wiring boards 50 and 60, the versatility is excellent. .

The conduction fixing pin 1 according to the embodiment has a configuration in which the elastic body 20 is formed of a first elastic portion 21 formed of a conical coil spring and a second elastic portion 22 formed of a compression coil spring.
Therefore, the conductive fixing pin 1 according to the embodiment can reduce the contact height of the first elastic portion as compared with the case where the first elastic portion is configured by the compression coil spring, and is configured of the conductive fixing pin and the conductive member. Can be made thinner.

The conduction fixing pin 1 according to the embodiment engages the first engagement portion 21 a formed in the first elastic portion 21 of the elastic body 20 with the engagement recess 11 a formed in the shaft portion 11 of the conduction fixing pin 1. Configuration.
Therefore, the conductive fixing pin 1 according to the embodiment can prevent the elastic body 20 from coming off from the conductive fixing pin 1 after the elastic body 20 is attached to the shaft portion 11, and the conductive member using the conductive fixing pin 1 Efficiency of fixing work.

  In the above embodiment, the conductive fixing pin 1 is used to connect and fix the heat sink 33 and the printed wiring board 32 and to connect and fix the two printed wiring boards 50 and 60. The combination of the two conductive members which can be conducted and fixed by using is not limited to this, and may be another combination.

  Moreover, in the said embodiment, although what consists of a combination of a conical coiled spring and a compression coiled spring was used as the elastic body 20, the combination of the 1st elastic part 21 and the 2nd elastic part 22 which comprises the elastic body 20 is this It is not limited to, but may be another combination.

  Furthermore, although the elastic body 20 is formed by the combination of the first elastic portion 21 and the second elastic portion 22 in the above embodiment, three elastic bodies 20 are formed by the combination of three or more elastic portions. It can also be made applicable to conduction and fixation of the above-mentioned conductive member.

DESCRIPTION OF SYMBOLS 1 Conduction fixation pin 10 Pin main body 11 Shaft part 11a Engaging recessed part 12 Head part 13 Hook part 14 Connecting part 15 Arrow part 15a End face 16 Slip prevention protrusion 16a Outer surface 20 Elastic body 21 1st elastic part 21a 1st engagement part 22 2 Elastic part 22a Second engaging part 31 Electronic component 32 Printed wiring board 33 Heat sink 34 1st mounting hole 35 Board part 36 Heat dissipation fin 41 Insulating board 42 Ground terminal 43 2nd mounting hole 50, 60 Printed wiring board 51, 61 Ground Terminal 52 First mounting hole 62 Second mounting hole 70 Spacer

Claims (5)

It consists of a resin pin body and a conductive elastic body attached to the outer periphery of the pin body,
The pin body includes a shaft, a head larger than the shaft formed at one end of the shaft, and a hook having a snap fit function formed at the other end of the shaft. Integrally formed,
The elastic body has a first elastic portion disposed on the head side and a second elastic portion disposed on the hook portion, and the whole is integrally configured with a coil spring. The conduction fixing pin according to claim 1, wherein a winding diameter of the first elastic portion is larger than that of the second elastic portion at least at an end portion of the second elastic portion.   The first elastic portion is a conical coil spring in which the winding diameter on the second elastic portion side is large and the winding diameter decreases as it reaches the head side, and the second elastic portion has a constant winding diameter. The compression coil spring, wherein the maximum winding diameter of the conical coil spring constituting the first elastic portion is larger than the winding diameter of the compression coil spring constituting the second elastic portion. The conduction fixing pin according to claim 1.   The shaft portion is formed at an end portion on the head side with an engagement recess for engaging one end of the first elastic portion, and the first elastic portion is at an end portion on the head side. The engagement fixing pin according to claim 1, wherein an engagement portion engaged with the engagement recess is formed. A conduction fixing method for fixing a first conductive member in which a first mounting hole is opened and a second conductive member in which a second mounting hole is opened in a state of being electrically conducted using a conductive fixing pin. There,
The conductive fixing pin includes a resin pin body and a conductive elastic body attached to the outer periphery of the pin body, and the pin body is formed at a shaft portion and one end of the shaft portion A head larger than the shaft and a hook having a snap fit function formed at the other end of the shaft are integrally formed, and the elastic body is disposed on the head It has a first elastic portion and a second elastic portion disposed on the hook portion side, and the whole is integrally configured with a coil spring, and the first elastic portion is at least the second elastic. At the end on the part side, the winding diameter is formed larger than that of the second elastic part,
The first mounting hole is a circular hole having a diameter such that the first elastic portion can not be inserted and the second elastic portion can be inserted, and the second mounting hole has a diameter such that the second elastic portion can not be inserted. A circular hole with
The first conductive member and the second conductive member are vertically disposed in a state in which the center of the first mounting hole and the center of the second mounting hole are aligned, and from the upper surface side of the first conductive member The shaft portion of the conduction fixing pin is pushed into the first attachment hole and the second attachment hole, and the hook portion of the conduction fixing pin is penetrated on the lower surface side of the second conductive member to form the hook portion 2 Contact the lower surface of the conductive member,
A conductive fixing method characterized in that a lower end portion of the first elastic portion elastically contacts an upper surface of the first conductive member, and a lower end portion of the second elastic member elastically contacts an upper surface of the second conductive member. .   A ring-shaped spacer having an inner diameter capable of penetrating the hook portion of the conduction fixing pin is placed between the first conductive member and the second conductive member, and the first attachment hole and the second attachment are provided. The conductive fixing pin is concentrically disposed with the hole, and the conductive fixing pin is serially inserted through the first mounting hole, the center hole of the spacer, and the second mounting hole, and the first conductive member, the spacer, and the second conductive are arranged. The conduction fixing method according to claim 4, wherein the sexing member is fixed integrally.