JP5261850B2 - Connection terminals and electronic devices - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector in which reliability of electric connection of a pair of plate members is improved as the connector is prevented from coming off easily from a through-hole or a cut-out of the plate members, and to provide electronic equipment. <P>SOLUTION: A cylindrical member 20 is fixed to a second plate member 12b (76) as it is inserted into a through-hole 18 and soldered or pushed into a cut-out 78, and furthermore, a recessed portion 36 is provided at the outer circumference of the cylindrical member 20. When a part of a solder enters the recessed portion 36 at the time of soldering of the cylindrical member 20 or a part of the second plate member 12b (76) enters the recessed portion 36 at the time of pushing the cylindrical member 20 into the cut-out 78, the recessed portion 36 functions as a displacement prevention part to prevent the cylindrical member 20 from displacing in an axial direction against the second plate member 12b (76). <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention provides a connection terminal that is provided between a pair of wiring boards or a pair of plate-like members composed of a wiring board and a plate-like component, and electrically connects both the plate-like members. The present invention relates to an electronic device provided with a plate member.

  Conventionally, as a kind of connection terminal, a conductive plunger is disposed in a conductive tube so as to be movable in the axial direction, and the plunger is disposed at one end in the axial direction of the tube by a spring disposed in the tube. There is a structure in which a flange-like portion is provided at the other end in the axial direction of the tube (see, for example, Patent Document 1) while being urged in a direction protruding from the opening portion of the portion.

  The connection terminal having such a structure electrically connects, for example, a pair of wiring boards (plate-like members) in various electronic devices such as a mobile phone, a notebook computer, a portable information terminal, a digital still camera, and a digital video camera. Used when

  As shown in FIG. 10, in the electronic device, a pair of wiring boards 100a and 100b are arranged to face each other in the thickness direction, and a through hole (through hole) 102 is formed in one wiring board 100a. The conductive terminal 104 is provided around the through hole 102, the tube 108 of the connection terminal 106 is inserted into the through hole 102, and the flange-shaped portion 110 of the connection terminal 106 is soldered to the conductive terminal 104. Has been.

  Then, at least one of the pair of wiring boards 100a and 100b (100b) approaches the other wiring board 100b (100a), and the plunger 112 of the connection terminal 106 is moved by the biasing force of the spring in the tube 108. By making pressure contact with the conductive terminal 114 of the other wiring board 100 b, the conductive terminal 104 of one wiring board 100 a and the conductive terminal 114 of the other wiring board 100 b are electrically connected via the connection terminal 106. The

  In such an electronic device, since the tube 108 of the connection terminal 106 is inserted into the through hole 102, the dimension of the connection terminal 106 protruding from one wiring board 100a to the other wiring board 100b can be suppressed. Therefore, the pressure contact type connection terminal 106 can be adopted even for an electronic apparatus in which the dimension of the gap between the pair of wiring boards 100a and 100b is relatively small.

Special table 2007-502520

  However, in the above-described electronic device, the fixing means between the tube 108 and the wiring board 100a is such that the flange-like portion 110 is in a direction substantially parallel to the protruding and retracting direction of the plunger 112 from the inside of the tube 108 via the solder. The configuration is such that the conductive terminal 104 of 100a is superposed and fixed. For this reason, when a pair of wiring boards 100a and 100b approach and the plunger 112 is pressed, a force for pulling the flange-shaped part 110 away from the conductive terminal 104 of the wiring board 100a acts on the flange-shaped part 110. When this force is excessive, the flange-shaped portion 110 is peeled off from the solder, and there is a problem that the connection terminal 106 may be detached from the through hole 102.

The present invention was made to such circumstances described above as a background, an object of the present invention, a connection terminal is prevented from coming off easily through-hole or these plate members, a pair of plate members An object of the present invention is to provide a connection terminal and an electronic device in which the reliability of electrical connection is improved.

The invention according to claim 1, which has been made in order to solve the above-described problems, includes (a) a cylindrical member having conductivity, and (b) an inner side of the cylindrical member, A conductive connecting pin that is movable in the axial direction and can be projected and retracted from the tip opening portion located on one end side in the axial direction of the cylindrical member along with the movement; and (c) in the cylindrical member And a biasing means for biasing the connection pin in a direction protruding outward from the tip opening portion of the cylindrical member, and a first plate-like member having a first conductive portion; And a second plate member disposed at a predetermined distance in the plate thickness direction and provided at a position facing the first conductive portion. The second plate shape The member is provided with a second conductive part, and an electronic device in which a through-hole penetrating in the thickness direction is formed at a site where the second conductive part is formed The cylindrical member is fixed to the through hole of the second plate member, thereby being electrically connected to the second conductive portion, and the connection pin being connected to the first conductive member. A connection terminal that is electrically connected to the first conductive portion and is electrically connected to the first conductive portion by contacting the first conductive portion, and the cylindrical member is By being inserted into the through hole and soldered, it is fixed to the second plate member, and the outer circumferential surface of the tubular member has a groove shape extending continuously in the circumferential direction. When a part of the solder enters the recess when the cylindrical member is soldered, the recess is configured such that the cylindrical member is against the second plate member. Functioning as a displacement prevention part for preventing displacement in the axial direction, and in the tubular member Between the serial recess and the distal end opening portion, the cylindrical stepped portion extending continuously in the circumferential direction on the outer peripheral surface is provided with a member, the outer diameter from the step to the distal end opening portion the step It is formed so that it may become smaller than the outer diameter on the opposite side to the said front-end opening part side .

In connection terminals of the present invention, since the recess is in the structure to enter a part of the solder, so long as excessive force of about one part of the solder entering into the recess is broken it is not applied, The recess is not displaced in the axial direction of the tubular member. Therefore, by approaching the pair of plate members, with respect to the connecting terminal, the tubular member even force is applied in a direction passing et or through hole, it is soldered in a flat surface with no recess as described above Compared to the conventional connection terminal, the resistance against the force in the pull-out direction is increased. As a result, the connection terminal is prevented from being easily detached et or through-hole, the reliability of the electrical connection of a pair of plate-shaped members is improved.

  In particular, when soldering by inserting a cylindrical member into a through-hole, solder enters the recess just by soldering, and this makes the recess function as a displacement prevention part, making it extremely easy The recess can function as a displacement prevention portion.

  In the connection terminal of the present invention, for example, as described in claim 2, a depth larger than a depth dimension of the recess is provided between the recess and the tip opening portion in the cylindrical member. You may employ | adopt the structure by which the solder penetration suppression recess of a dimension is provided.

  According to such a configuration, when the cylindrical member is inserted into the through hole, the size of the gap formed between the outer peripheral surface of the solder intrusion suppression recess forming portion and the inner wall surface of the through hole in the cylindrical member is reduced. This is larger than the size of the gap formed between the outer peripheral surface of the recess forming portion and the inner wall surface of the through hole.

  Therefore, when the solder flows between the outer peripheral surface of the cylindrical member and the inner wall surface of the through-hole, the solder is likely to enter the gap due to capillary action in a gap narrower than the formation portion of the solder intrusion suppression recess. On the other hand, the solder is prevented from entering the gap at the portion where the solder intrusion suppression recess is formed.

Therefore, the solder is suppressed from reaching the tip opening portion of the cylindrical member, and the contact between the connecting pin protruding from the tip opening portion and the solder can be suppressed.
In the connection terminal of the present invention, for example, as described in claim 3, a screw groove is provided on the outer peripheral surface of the cylindrical member, and the screw groove is configured as the recess, and further the cylindrical shape. You may employ | adopt the structure by which the knob part for rotating this cylindrical member is provided in the other edge part of the axial direction of a member. Thereby, in addition to being able to easily form a plurality of recesses using the thread groove, when removing the connection terminal from the second plate member, the knob portion is rotated to The connection can be released and the connection terminal can be easily pulled out from the through hole.

Furthermore, in order to solve the above-mentioned problem, the invention according to claim 4 includes (a) a first plate-like member having a first conductive portion, and (b) the first plate-like member. And a second plate-like member disposed at a predetermined distance in the plate thickness direction and facing the first conductive portion, wherein the second conductive portion is provided, and the second A second plate-like member in which a through-hole penetrating in the plate thickness direction is formed in the formation portion of the conductive portion, (c) a cylindrical member having conductivity, and disposed inside the cylindrical member, An electrically conductive connecting pin that is movable in the axial direction of the cylindrical member and can project and retract from a tip opening portion located on one end side in the axial direction of the cylindrical member along with the movement, and the cylindrical member And a biasing means for biasing the connection pin in a direction protruding outward from the tip opening portion of the cylindrical member, the cylindrical member being A connection terminal electrically connected to the second conductive portion by being fixed to the through-hole, and the connection pin is in contact with the first conductive portion, whereby the connection terminal is connected to the first conductive portion. An electronic device that is electrically connected to a first conductive portion and electrically connects the first conductive portion and the second conductive portion, wherein the cylindrical member is inserted into the through hole and soldered By doing so, it is fixed to the second plate-like member, and on the outer peripheral surface of the cylindrical member, a groove-like recess extending continuously in the circumferential direction is provided, When a part of the solder enters the recess when soldering the cylindrical member, the recess prevents the cylindrical member from being displaced in the axial direction with respect to the second plate member. Functioning as a displacement prevention part, and in the cylindrical member, the recess and the tip opening And between, the cylindrical stepped portion extending continuously in the circumferential direction on the outer peripheral surface is provided with a member, the outer diameter from the step to the distal end opening portion opposite to the distal end opening portion side of the step It is formed so that it may become smaller than the outer diameter of the side .

The electronic equipment of the present invention, since the recess to enter the part of the solder, so long as excessive force of about one part of the solder is broken is not applied, recesses in the axial direction of the tubular member And will not be displaced. Therefore, by approaching the pair of plate members, with respect to the connecting terminal, the tubular member even force is applied in a direction passing et or through hole, it is soldered in a flat surface with no recess as described above Compared to the conventional connection terminal, the resistance against the force in the pull-out direction is increased. As a result, the connection terminal is prevented from being easily detached et or through-hole, the reliability of the electrical connection of a pair of plate-shaped members is improved.

1 is a longitudinal sectional view of an electronic apparatus as a first embodiment of the present invention. It is drawing which shows the connection terminal which comprises some electronic devices of FIG. 1, Comprising: (a) is a perspective view of a connection terminal, (b) is a perspective view of the connection terminal which reversed (a) and the top-and-bottom direction. FIG. (A) is a plan view of the connection terminal of FIG. 2, (b) is a front view of the connection terminal, (c) is a bottom view of the connection terminal, and (d) is a D of (b). -D sectional view. FIG. 3 is a longitudinal sectional view showing one manufacturing process of the electronic device of FIG. 1. The longitudinal cross-sectional view of the electronic device as 2nd Embodiment of this invention. The longitudinal cross-sectional view which shows the electronic device as 3rd Embodiment of this invention. FIG. 8 is a perspective view of a connection terminal that constitutes a part of the electronic apparatus of FIG. 7. It is drawing which shows the connecting terminal of FIG. 8, (a) is a top view of the connecting terminal, (b) is a front view of the connecting terminal, (c) is a bottom view of the connecting terminal. (D) is a DD sectional view of (b). The perspective view of the electronic device as 4th Embodiment of this invention. The longitudinal cross-sectional view of the electronic device of a conventional structure.

[First Embodiment]
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an electronic apparatus 10 as a first embodiment of the present invention. The electronic device 10 is configured such that a first wiring board 12a, a second wiring board 12b, and a connection terminal 14 are accommodated in a housing (not shown). For example, a mobile phone, a notebook computer, It is applied to portable information terminals, digital still cameras, digital video cameras and the like.

The first and second wiring boards 12a and 12b are plate-like members in which wiring is attached to the surface of a flat board made of an insulating material by printing or the like.
The first wiring substrate 12a is formed with a first conductive terminal 16a as a first conductive portion made of a conductive material, and is connected to the wiring on the substrate 12a.

  Furthermore, a substantially circular through hole 18 as a through hole is formed in the second wiring board 12b so as to penetrate in the plate thickness direction (vertical direction in FIG. 1). Around the through hole 18 of the second wiring substrate 12b, a second conductive terminal 16b as a second conductive portion made of a conductive material is formed and connected to the wiring on the substrate 12b.

  As shown in FIGS. 2 and 3, the connection terminal 14 has a substantially cylindrical shape as a whole, and is formed using various conductive materials (for example, a metal material or a conductive resin material). Moreover, the connection terminal 14 is comprised including the cylindrical member 20, the connection pin 22, and the coil spring 24 as an urging means.

  The cylindrical member 20 has a bottomed cylindrical shape, and the cylindrical part on the other end side (bottom side) in the axial direction opposite to the one end side (tip opening part 26 side) in the axial direction includes A flange-shaped portion 28 that extends radially outward from the tubular portion is integrally formed. The outer diameter dimension of the flange-shaped portion 28 is larger than the diameter dimension of the through hole 18. In particular, the flange-shaped portion 28 of the present embodiment has a step portion 30 formed at an axially intermediate portion thereof, and one axial side near the tip opening portion 26 across the step portion 30 is separated from the tip opening portion 26 in the other axial direction. A stepped ring shape having a diameter larger than that of the step is used.

  Further, the cylindrical coil spring 24 and the large-diameter portion 32 of the stepped columnar connection pin 22 are inserted from the distal end opening portion 26 of the cylindrical member 20, so that the distal end opening portion 26 side of the cylindrical member 20 is located. Since the cylindrical portion is subjected to a diameter reduction process such as an eight-way drawing, the large-diameter portion 32 of the connection pin 22 and the coil spring 24 are prevented from coming out of the distal end opening portion 26 to the outside in the cylindrical member 20. Is housed in. One end of the coil spring 24 is in contact with the bottom of the cylindrical member 20, and the other end of the coil spring 24 is in contact with the large-diameter portion 32 of the connection pin 22. The small diameter portion 34 of the connection pin 22 protrudes outward from the tip opening portion 26 of the tubular member 20. Note that the end portion of the connection pin 22 protruding from the cylindrical member 20, that is, the end portion of the small diameter portion 34 opposite to the end portion in contact with the large diameter portion 32 is substantially hemispherical.

  Furthermore, a circumferential groove 36 as a recess is provided in an axially intermediate portion located between the tip opening portion 26 and the bottom portion of the cylindrical member 20. The circumferential groove 36 has a groove shape that continuously extends in the circumferential direction of the outer circumferential surface of the tubular member 20. Note that a cross section of the circumferential groove 36 in a direction parallel to the central axis direction of the cylindrical member 20 is a square concave shape that opens outward in the radial direction of the cylindrical member 20.

  Furthermore, a solder intrusion suppression groove 38 as a solder intrusion suppression recess is provided between the distal end opening portion 26 of the cylindrical member 20 and the circumferential groove 36. Similarly to the circumferential groove 36, the solder intrusion suppression groove 38 has a groove shape that continuously extends in the circumferential direction on the outer circumferential surface of the tubular member 20. Further, the axial dimension of the solder intrusion suppression groove 38 is made larger than the axial dimension of the circumferential groove 36, and the radial depth dimension of the solder intrusion suppression groove 38 is the depth of the circumferential groove 36. The size is larger than the size.

  The cylindrical member 20 of the connection terminal 14 is assembled to the second wiring board 12b. As shown in FIG. 4, one step of the assembly is performed by inserting the cylindrical member 20 into the through hole 18 and flange-shaped the cylindrical member 20 with respect to the cream solder 40 previously applied to the second conductive terminal 16 b. The parts 28 are overlapped. The cream solder 40 is a paste-like composition adjusted to an appropriate viscosity by adding a flux to the solder powder.

  Then, the connection terminal 14 and the second wiring board 12b are placed in a furnace (not shown) and heated to melt the cream solder 40 and solder the flange-shaped portion 28 to the second conductive terminal 16b. So-called reflow soldering.

  Here, when the cream solder 40 is soldered to the flange-shaped portion 28 and the second conductive terminal 16 b, a part of the solder 40 is between the inner wall surface of the through hole 18 and the outer peripheral surface of the tubular member 20. An amount sufficient to flow a predetermined amount into the gap is calculated and applied to the second conductive terminal 16b.

  Therefore, when the flange-shaped portion 28 is soldered to the second conductive terminal 16b, a part of the cream solder 40 flows into the gap between the inner wall surface of the through hole 18 and the outer peripheral surface of the cylindrical member 20. As shown in FIG. 1, the cylindrical member 20 is attached to the outer peripheral surface from the flange-shaped portion 28 to the intermediate portion in the axial direction. Thereby, the cylindrical member 20 is soldered not only on the second conductive terminal 16b and the flange-shaped portion 28 but also on the outer peripheral surface.

  Further, since the cream solder 40 is filled and solidified in the entire circumferential groove 36 of the cylindrical member 20, the circumferential groove 36 is displaced in the axial direction with respect to the second wiring board 12b. It functions as a displacement blocker that blocks the movement.

  Further, in the present embodiment, solder is applied to the entire stepped portion 30 of the flange-shaped portion 28 so that the stepped portion 30 is embedded in the solder so that the second conductive terminal 16b is soldered. Has been. This solder is constituted by a part of the cream solder 40 described above that is attached to the outer peripheral surface of the flange-shaped portion 28 or the cylindrical member 20. The step portion 30 functions as a displacement prevention portion that cooperates with the circumferential groove 36 to prevent the cylindrical member 20 from being displaced in the axial direction with respect to the second wiring board 12b.

  The above-mentioned first wiring board 12a is fixed to the housing via screws, bolts, adhesive, etc. (not shown). Further, the second wiring board 12b to which the connection terminal 14 is fixed is opposed to the first wiring board 12a with a predetermined distance in the plate thickness direction (vertical direction in FIG. 1), and a screw or the like (not shown) It is fixed to the housing via a bolt, an adhesive or the like.

  When the first wiring board 12a and the second wiring board 12b are fixed to the housing, the tip portion of the connection pin 22 of the connection terminal 14 is pressed against the first conductive terminal 16a of the first wiring board 12a. Thus, the small-diameter portion 34 of the connection pin 22 is displaced in a direction to be buried in the cylindrical member 20 by a predetermined amount, and the coil spring 24 is pivoted between the large-diameter portion 32 of the connection pin 22 and the bottom portion of the cylindrical member 20. Compressive deformation in the direction.

  As a result, a biasing force is exerted on the connection pin 22 in a direction in which the small-diameter portion 34 protrudes outward from the tip opening portion 26 of the cylindrical member 20 by the coil spring 24, so that the connection pin 22 becomes the first conductive terminal. The first conductive terminal 16 a and the second conductive terminal 16 b are electrically connected to each other through the connection terminal 14.

  In the electronic device 10 having the above-described structure, when the first conductive terminal 16a and the second conductive terminal 16b are connected via the connection terminal 14, the connection pin 22 (small diameter portion 34) is provided. When buried in the cylindrical member 20, a force is exerted in a direction in which the flange-shaped portion 28 of the cylindrical member 20 in the connection terminal 14 is separated from the second conductive terminal 16b.

  Here, the cylindrical member 20 is fixed to the second wiring board 12b so as not to be displaced in the axial direction by a displacement prevention portion including the circumferential groove 36 and the step portion 30, and this axial direction is a flange. Since the shape portion 28 is substantially the same as the direction away from the second conductive terminal 16b, the displacement of the tubular member 20 in the separation direction is prevented, and the tubular member 20 and the second conductive terminal 16b. The connection state between the first conductive terminal 16a and the second conductive terminal 16b is maintained.

  In particular, in this embodiment, since the circumferential groove 36 functions as a displacement preventing portion by filling the circumferential groove 36 with solder that connects the cylindrical member 20 and the second conductive terminal 16b, for example, the circumferential groove There is no need to specially form a knob portion to be fitted into the second wiring board 16b, thereby simplifying the manufacturing process and reducing the number of parts for the protrusions. The cost can be reduced.

  In the present embodiment, a solder intrusion suppression groove 38 larger than the circumferential groove 36 in the radial depth dimension and the axial dimension is formed between the circumferential groove 36 of the cylindrical member 20 and the tip opening portion 26. Therefore, the size of the gap between the part where the solder intrusion suppressing groove 38 is formed in the cylindrical member 20 and the inner wall of the through hole 18 is equal to the part where the circumferential groove 36 is formed in the cylindrical member 20 and the through hole 18. It becomes larger than the size of the gap between the inner wall. As a result, the capillary phenomenon (capillary phenomenon) at the time when the cream solder 40 flows in the gap is smaller in the gap in the portion where the solder intrusion suppression groove 38 is formed than in the gap in the portion where the circumferential groove 36 is formed. However, it becomes difficult to flow at the site where the solder intrusion suppression groove 38 is formed. As a result, the cream solder 40 is prevented from reaching the tip opening portion 26 from the portion where the circumferential groove 36 of the cylindrical member 20 is formed, and the contact between the connecting pin 22 protruding from the tip opening portion 26 and the solder 40 is suppressed. It is done.

  In addition, in this embodiment, since reflow soldering using cream solder 40 is employed to fix the connection terminal 14 to the second wiring board 12b, it is easy even with the connection terminal 14 having a small size. Can be soldered.

[Second Embodiment]
Next, FIG. 5 shows an electronic device 50 as a second embodiment of the present invention. In the following description, members and parts having substantially the same structure as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed descriptions thereof are omitted. To do.

  The electronic device 50 includes a connection terminal 52 having a configuration in which the small-diameter portion 28a and the large-diameter portion 28b of the flange-shaped portion 28 are arranged in the opposite directions in the connection terminal 14 of the first embodiment.

  Then, when the connection terminal 52 is assembled to the second wiring board 12b, the solder 40 is filled in the circumferential groove 36 as in the first embodiment, and only the small diameter portion 28a of the flange-shaped portion 28 is the first. The second conductive terminal 16b is soldered. That is, in the connection terminal 52 of the present embodiment, soldering to the stepped portion 30 of the flange-shaped portion 28 is not performed as in the first embodiment.

  Also in such an electronic device 50, as in the first embodiment, the circumferential groove 36 is filled with solder, and the circumferential groove 36 serves as an axial displacement prevention portion for the second wiring board 12b of the tubular member 20. By functioning, the connection terminal 52 is prevented from being detached from the through hole 18 of the electronic device 50.

In particular, in this embodiment, since the solder is not soldered to the stepped portion 30 of the flange-like portion 28 as in the first embodiment, the cost can be reduced by reducing the amount of solder 40 used.
[Third Embodiment]
Next, FIG. 6 shows an electronic device 60 as a third embodiment of the present invention. The electronic device 60 includes a connection terminal 62 as shown in FIGS. A thread groove (female thread portion) 64 having a plurality of screw threads is provided in an axially intermediate portion between the flange-shaped portion 28 and the tip opening portion 26 on the outer peripheral surface of the cylindrical member 20 of the connection terminal 62. Yes. The thread groove 64 corresponds to a recess according to the present invention.

In addition, a substantially rectangular plate-like knob portion 66 is provided projecting outward in the axial direction at the axial end of the tubular member 20 on the side where the flange-shaped portion 28 is formed.
In such an electronic device 60, as in the first embodiment, the flange-shaped portion 28 is soldered to the second conductive terminal 16b, and the solder 40 is further filled in the screw groove 64 and solidified to be screwed. The groove 64 functions as an axial displacement prevention portion for the cylindrical member 20 with respect to the second wiring board 12b. Therefore, the connection terminal 62 is prevented from being detached from the through hole 18 of the electronic device 60.

  Here, in the present embodiment, the thread groove 64 is particularly employed as the above-described displacement prevention portion, and the knob portion 66 is further projected from the cylindrical member 20. By rotating 20 around the central axis, the thread groove 64 has a displacement function for displacing the tubular member 20 in the direction of pulling it out of the solder. Thereby, for example, when disposing the electronic device 60, the connection terminals 62 soldered to the wiring board 12b can be easily detached from the wiring board 12b even by a human finger or the like.

[Fourth Embodiment]
Next, FIG. 9 shows an electronic device 70 as a fourth embodiment of the present invention. The electronic device 70 includes the connection terminals 14 similar to those of the first embodiment, but the configuration of the plate-like member that fixes the connection terminals 14 is different from that of the second wiring board 12b of the first embodiment. The plate-like member for fixing the connection terminal 14 is constituted by an attachment plate portion 76 formed on the sheet metal 72.

  Specifically, the sheet metal 72 is made of a thin plate-like metal material, and a part of the sheet metal 72 is cut through in the thickness direction by pressing, and a hole 74 is formed therethrough. A bifurcated attachment plate portion 76 is formed so as to rise from the plate thickness direction to one side (upward in FIG. 9). The mounting plate portion 76 includes a notch 78 having an opening at the edge portion of the plate portion 76 with its bifurcated shape.

  When the connection terminal 14 is assembled to the mounting plate portion 76, the tubular member 20 is moved laterally from the opening portion of the notch 78 (in a direction parallel to the front and back surfaces of the mounting plate portion 76) inside the notch 78. Then, a portion around the notch 78 of the mounting plate portion 76 is fitted into the circumferential groove 36. Thereby, the circumferential groove 36 functions as an axial displacement prevention portion for the mounting plate portion 76 of the tubular member 20.

  Further, the sheet metal 72 to which the connection terminal 14 is fixed in this manner is disposed while a pair of wiring boards (not shown) face each other, and the flange-like portion 28 of the connection terminal 14 is formed on the surface of one wiring board. In addition to being connected to the conductive terminal by soldering or the like, the tip end portion of the connection pin 22 is in pressure contact with the conductive terminal as the first conductive portion formed on the surface of the other wiring board. Thereby, one wiring board and the other wiring board are electrically connected via the connection terminal. In addition, the part around the notch 78 fitted in the circumferential groove 36 in the attachment plate portion 76 corresponds to the second conductive portion of the present invention.

  Therefore, according to the electronic device 70 of the present embodiment, the cylindrical member 20 is connected to the pair of wirings by a relatively simple operation of fitting the portion around the notch 78 into the circumferential groove 36 of the cylindrical member 20. It is possible to prevent the sheet metal 72 from falling out of the notch 78 between the substrates. Therefore, the reliability of electrically connecting the pair of wiring boards is improved while simplifying the manufacturing process.

[Modification]
Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the specific descriptions in these embodiments, and various changes, modifications, and improvements based on the knowledge of those skilled in the art. It can be implemented in a mode to which etc. are added. Further, it goes without saying that any such embodiments are included in the scope of the present invention as long as they do not depart from the spirit of the present invention.

  For example, in the above-described embodiment, the circumferential groove 36 that continuously extends in the circumferential direction of the tubular member 20 is employed as the recess of the present invention. However, the groove has a predetermined length that is less than one circumferential length in the circumferential direction. Or the recessed part of this invention may be comprised by the recessed part provided apart in the circumferential direction.

Moreover, in the said embodiment, although the coil spring 24 was used as an urging means, you may use an electroconductive metal leaf | plate spring.
Moreover, in 4th Embodiment, the flange-shaped part 28 of the connecting terminal 14 is not an essential structural requirement.

  Furthermore, in the fourth embodiment, the tubular member 20 is inserted in the lateral direction from the opening portion of the notch 78, and the peripheral portion of the notch 78 is fitted into the circumferential groove 36. However, for example, the tubular member 20 Is inserted into the notch 78 in the axial direction parallel to the plate thickness direction of the mounting plate portion 76, and the peripheral portion of the notch 78 and the flange-like portion 28 are soldered, and the outer periphery of the cylindrical member 20 The solder is poured into the gap between the surface and the inner wall surface of the notch 78, and the circumferential groove 36 is filled with the solder and solidified, so that the circumferential groove 36 is axially directed to the mounting plate portion 76 of the tubular member 20. You may make it function as a displacement prevention part.

DESCRIPTION OF SYMBOLS 10 ... Electronic device, 12a ... 1st wiring board, 12b ... 2nd wiring board, 14 ... Connection terminal, 16a ... 1st conductive terminal, 16b ... 2nd conductive terminal, 18 ... Through-hole, 20 ... Tube , 22 ... connecting pin, 26 ... tip opening, 36 ... circumferential groove, 40 ... cream solder, 72 ... sheet metal, 76 ... mounting plate part, 78 ... notch

Claims (4)

A cylindrical member having conductivity, and disposed inside the cylindrical member, is movable in the axial direction of the cylindrical member, and is positioned on one end side in the axial direction of the cylindrical member along with the movement. Conductive connection pins that can project and retract from the tip opening portion, and a biasing means that is disposed in the cylindrical member and biases the connection pin in a direction protruding outward from the tip opening portion of the cylindrical member. And
A first plate-like member having a first conductive portion; and a first plate-like member arranged at a predetermined distance from the first plate-like member in the plate thickness direction and provided at a position facing the first conductive portion. A second conductive member, and the second conductive member is provided with a second conductive portion, and a through-hole penetrating in the thickness direction is formed at a portion where the second conductive portion is formed. In the electronic device, the cylindrical member is fixed to the through hole of the second plate member, so that it is electrically connected to the second conductive portion and the connection pin Is a connection terminal that is electrically connected to the first conductive portion by contacting the first conductive portion and electrically connects the first conductive portion and the second conductive portion,
The cylindrical member is fixed to the second plate member by being inserted into the through hole and soldered,
Moreover, a groove-like recess extending continuously in the circumferential direction is provided on the outer peripheral surface of the cylindrical member, and a part of the solder enters the recess when the cylindrical member is soldered. And the recess functions as a displacement blocking portion for blocking the cylindrical member from being displaced in the axial direction with respect to the second plate-shaped member,
Between the recess and the distal end opening portion in the tubular member, a step extending continuously in the circumferential direction on the outer peripheral surface is provided in the tubular member, from the step to the distal end opening portion A connection terminal characterized in that the outer diameter is formed to be smaller than the outer diameter of the step opposite to the end opening portion side .   In the tubular member, a solder intrusion suppression recess having a depth dimension larger than the depth dimension of the recess is provided between the recess and the tip opening portion, and the step is defined by the solder intrusion. The connection terminal according to claim 1, wherein the connection terminal has a step.   A screw groove is provided on the outer peripheral surface of the cylindrical member, and the screw groove is configured as the recess. Further, the cylindrical member is rotated at the other axial end of the cylindrical member. The connection terminal according to claim 1, wherein a knob portion is provided. A first plate-like member having a first conductive portion;
A second plate-like member disposed at a predetermined distance from the first plate-like member in the plate thickness direction and provided at a position facing the first conductive portion, wherein the second conductive portion A second plate-like member in which a through-hole penetrating in the plate thickness direction is formed in the formation portion of the second conductive portion;
A cylindrical member having conductivity, and disposed inside the cylindrical member, is movable in the axial direction of the cylindrical member, and is positioned on one end side in the axial direction of the cylindrical member along with the movement. Conductive connection pins that can project and retract from the tip opening portion, and a biasing means that is disposed in the cylindrical member and biases the connection pin in a direction protruding outward from the tip opening portion of the cylindrical member. A connecting terminal electrically connected to the second conductive portion by fixing the cylindrical member to the through-hole,
When the connection pin contacts the first conductive portion, the connection terminal is electrically connected to the first conductive portion, and the first conductive portion and the second conductive portion are electrically connected. Electronic equipment
The cylindrical member is fixed to the second plate member by being inserted into the through hole and soldered,
Moreover, a groove-like recess extending continuously in the circumferential direction is provided on the outer peripheral surface of the cylindrical member, and a part of the solder enters the recess when the cylindrical member is soldered. And the recess functions as a displacement blocking portion for blocking the cylindrical member from being displaced in the axial direction with respect to the second plate-shaped member,
Between the recess and the distal end opening portion in the tubular member, a step extending continuously in the circumferential direction on the outer peripheral surface is provided in the tubular member, from the step to the distal end opening portion An electronic apparatus characterized in that an outer diameter is formed to be smaller than an outer diameter of the step on the side opposite to the tip opening portion side .

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