JP2009052913A - Coaxial contact and coaxial multiconductor connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial contact low in price and easy to manufacture. <P>SOLUTION: This coaxial contact is equipped with at least: a first connection member connected to cores of a coaxial cable; and an extensible body including a first housing of a cylinder shape with the connection member housed therein, a second housing of a cylinder shape disposed at a distance from the first housing, a second connection member housed in the second housing and connected to the first connection member, and a grounding member connected to the shield of the coaxial cable. The bottom of the second connection member is formed as a contact part for signal line while the top thereof is connected to the first connection member vertically slidably relative to the first connection member and rotatably around its center axis. The grounding member includes a first fixation part with the first housing fixed thereto, a second fixation part with the second housing fixed thereto, a first spring part formed between the first and second fixation parts, and a second spring part formed below the second fixation part. The first housing is coupled to the second housing via the first spring part while the free end of the second spring part is formed as a contact part for grounding. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coaxial contact that is provided at one end of a coaxial cable and is axially pressed against and contacts an electrode pattern to be contacted, and a coaxial multi-core connector that accommodates a plurality of coaxial contacts.

  As a coaxial contact provided at one end of a coaxial cable, as disclosed in Patent Document 1, a conductive contact pin is known as a probe for performing an electrical inspection of a printed circuit board or an electronic device.

  In the conventional coaxial contact, the central conductor for transmitting a high-frequency signal and the outer conductor for shielding can be in electrical contact with the signal electrode and grounding electrode of the printed circuit board or electronic device as the contact object, respectively. It is configured as follows. The coaxial contact is also configured such that the outer conductor can be connected to the ground electrode before the center conductor contacts the signal electrode.

Japanese Patent No. 2944677

  In the conventional coaxial contact, separate springs are used for the electrical contact between the center conductor and the signal electrode and the electrical contact between the outer conductor and the ground electrode so that contact pressure can be obtained independently. Has been done. Accordingly, the number of parts constituting the coaxial contact increases, and the configuration is complicated, and it takes time to manufacture and the cost may increase.

  In view of such problems, an object of the present invention is to provide a coaxial contact that is inexpensive and easy to manufacture.

  In order to achieve the above object, a coaxial contact according to the present invention includes a first connecting member electrically connected to a core wire of the coaxial cable through which a signal is transmitted, and the first connecting member is accommodated and fixed. A cylindrical first housing, a cylindrical second housing spaced apart from the first housing, and housed and fixed in the second housing, and electrically connected to the first connecting member. And a telescopic body including a grounding member electrically connected to the shield of the coaxial cable, and a lower end of the second connecting member protrudes from a lower end of the second housing. And an upper end thereof is connected to the first connecting member so as to be slidable in the vertical direction and to be rotatable around a central axis. The grounding member is connected to the first housing. A first fixing portion defined, a second fixing portion to which the second housing is fixed, a first spring portion formed between the first fixing portion and the second fixing portion, and a second fixing portion. A second spring portion formed below, and the grounding member connects the first housing and the second housing at an interval via the first spring portion, and the grounding member The free end of the second spring portion is configured as a ground contact portion.

  In the coaxial contact according to the present invention, it is preferable that the ground contact point is disposed below the signal line contact point.

  Furthermore, in the coaxial contact according to the present invention, both the first spring portion and the second spring portion are formed as coil springs.

  In the coaxial contact according to the present invention, the first connecting member has at least a main body to which the core wire of the coaxial cable is connected, and an elongated sliding pin extending below the main body, and the second connecting member is at the upper end thereof. A pair of elastic clamping pieces that elastically clamp the sliding pin of the first connecting member may be provided, and a signal line contact portion may be provided at the lower end thereof. Alternatively, the first connection member has at least a main body to which the core wire of the coaxial cable is connected and a pair of elastic clamping pieces extending below the main body, and the second connection member has the first connection at the upper end thereof. The connecting member may have a long and narrow sliding pin that is elastically held between the pair of elastic holding pieces and has a signal line contact portion at the lower end thereof.

  In the coaxial contact according to the present invention, the first connecting member and the second connecting member that are slidable and rotatable with each other are connected to each other by a ground member having two spring portions. It can be formed by punching from a thin metal plate and has a simple structure. Therefore, the coaxial contact according to the present invention is easy to manufacture, requires a small number of parts, and is easy to assemble. As a result, the manufacturing cost as a whole can be suppressed.

  The coaxial contact of the present invention is also provided with the above-described structure, so that the coaxial contact is pressed against the printed circuit board in the ground contact portion provided in the ground member and the signal line contact portion provided in the second connection member. It is possible to rotate at the same time, and a wiping action can be expected with respect to the external contact of the printed circuit board that comes into contact. Therefore, the coaxial contact of the present invention enables stable electrical contact.

  Furthermore, the coaxial contact according to the present invention enables highly reliable electrical contact since the ground contact portion contacts the external electrode of the printed circuit board before the signal line contact portion.

  Hereinafter, embodiments of a coaxial contact according to the present invention and a connector using the coaxial contact will be described with reference to the drawings.

(First embodiment)
1 is a front view of a coaxial contact according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of the coaxial contact shown in FIG. 1, and FIG. 3 is a coaxial type shown in FIG. FIG. 4 is an exploded view of the grounding member constituting the coaxial contact shown in FIG. FIG. 5 shows a pattern of an external electrode of a printed circuit board as a contact object to which the coaxial contact according to the present invention comes into contact. FIG. 5A shows one pattern, and FIG. 5B shows another pattern. The pattern is shown. 6 is a diagram for explaining the relationship between the deformation of the two spring portions of the first spring portion and the second spring portion formed in the grounding member shown in FIG. 4 and the contact pressure at the contact portion. These are the graphs which show the relationship between the deformation | transformation of two spring parts formed in the grounding member shown by FIG. 4, and a contact pressure.

The coaxial contact 10 (hereinafter simply referred to as “contact 10”) according to the first embodiment of the present invention is provided at one end portion of the coaxial cable 70 and is an electrode 60 (see FIG. 5) of the printed circuit board 100 to be contacted. ) To the lower side of the contact 10 along the central axis O ₁ -O ₁ to electrically connect the coaxial cable 70 and the printed circuit board. In the electrode 60 formed on the printed circuit board 100, a circular signal line electrode 61 and an annular ground electrode 62 are preferably arranged concentrically as shown in FIG. The electrode 60 formed on the printed circuit board 100 is not limited to this. For example, as shown in FIG. 5B, a circular signal line electrode 61 and a pair of arc-shaped ground electrodes 62a and 62b. May be arranged concentrically.

  The contact 10 according to this embodiment includes a sleeve 15, a first connection member 20, and an extendable body 30.

  The sleeve 15 is a member for connecting the coaxial cable 70 and the telescopic body 30 and has a substantially cylindrical shape. The sleeve 15 is preferably formed from a conductive metal.

The first connection member 20 is a member attached to the end of the core wire 71 of the coaxial cable 70 and is electrically connected to a second connection member 50 described later. The first connecting member 20 is preferably formed from a conductive metal material. The first connection member 20 is disposed so as to be movable in the vertical direction along the central axis O ₁ -O ₁ of the contact 10 and to be rotatable with respect to the second connection member 50.

  The first connection member 20 includes a main body 21 having a circular cross section and an elongated sliding pin 22 extending below the main body 21. An insertion hole 25 into which one end of the core wire 71 of the coaxial cable 70 is inserted is formed in the main body 21 of the first connection member 20. The first connection member 20 can be formed by cold forging, for example.

  After the core wire 71 of the coaxial cable 70 is inserted into the insertion hole 25, it is fixed to the main body 21 of the first connection member 20 by means of soldering, crimping, laser welding or the like, in this embodiment, by caulking 26. In addition, the first connection member 20 is electrically connected. The sliding pin 22 of the first connection member 20 can move in the vertical direction with respect to a second connection member 50 described later, and can maintain an electrical connection with the second connection member 50. The second connecting member 50 is elastically sandwiched between a pair of elastic sandwiching pieces 52a and 52b.

  Next, the telescopic body 30 includes a first housing 31, a second housing 36, a second connection member 50, and a grounding member 40.

  The first housing 31 is made of an electrically insulating synthetic resin, is formed in a substantially cylindrical shape having a through hole 33 penetrating vertically, and has at least one on the outer periphery (in the present embodiment, facing each other). Two) protrusions 32 are formed at the position. The main body 21 of the first connection member 20 is press-fitted into the through hole 33 of the first housing 31, whereby the first connection member 20 is accommodated and fixed in the first housing 31. The method of fixing the first connection member 20 to the first housing 31 is not limited to press-fitting, and may be executed by using an adhesive or in combination with press-fitting, for example.

  Similarly, the second housing 36 is made of an electrically insulating synthetic resin, and is formed in a substantially cylindrical shape having a through-hole 38 penetrating vertically, and has at least one outer periphery (in this embodiment, 2 Projections 37 are formed at opposite positions. The outer diameter of the second housing 36 is the same as the outer diameter of the first housing 31.

  A body 51 of a second connection member 50 to be described later is press-fitted into the through hole 38 of the second housing 36, whereby the second connection member 50 is fixed to the second housing 36. The method for fixing the second connecting member 50 to the second housing 36 may also be executed by using an adhesive or by combining with press fitting. Note that the second connecting member 50 has a second housing so that a contact portion 51a which is a tip (lower end) of the main body 51 of the second connecting member 50 protrudes from the lower end of the second housing 36 by an appropriate length. 36 is fixed.

As shown in FIG. 3, the first housing 31 and the second housing 36 are spaced from each other along a central axis O ₁ -O ₁ of the contact 10 via a grounding member 40 described later, It is connected so that it can move. Thereby, as described above, the sliding pin 22 of the first connection member 20 fixed to the first housing 31 is connected to the pair of elastic clamping pieces 52 a and 52 b of the second connection member 50 fixed to the second housing 36. It can move up and down along the central axis O ₁ -O ₁ of the contact 10 (see FIG. 2). The sliding pin 22 of the first connecting member 20 can also rotate around the central axis O ₁ -O ₁ of the contact 10 between the pair of elastic clamping pieces 52 a and 52 b of the second connecting member 50.

The second connection member 50 contacts the signal electrode 61 among the electrodes 60 of the printed circuit board 100 to be contacted, and electrically connects the coaxial cable 70 (more specifically, the core wire 71 of the coaxial cable 70) and the printed circuit board 100. It is a member to connect. Therefore, the second connection member 50 is formed from a conductive metal material. As described above, the second connecting member 50 is disposed so as to be movable in the vertical direction along the central axis O ₁ -O ₁ of the contact 10 and to be rotatable with respect to the first connecting member 20.

The second connection member 50 includes a cylindrical main body 51 having a circular cross section and a pair of elastic clamping pieces 52 a and 52 b extending above the main body 51. Each of the pair of elastic clamping pieces 52a and 52b is preferably formed in a circular arc shape in cross section, and is symmetrically disposed via a slit 53 formed in parallel to the central axis O ₁ -O ₁ of the contact 10. . As described above, the pair of elastic clamping pieces 52a and 52b elastically clamps the sliding pin 22 of the first connection member 20, and electrically connects the first connection member 20 and the second connection member 50. . Therefore, as shown in FIG. 3, the pair of elastic clamping pieces 52 a and 52 b are arranged in an upward state in a no-load state where the pair of elastic clamping pieces 52 a and 52 b do not clamp the sliding pin 22 of the first connection member 20. The distance between the slits 53 is narrowed as the line goes to. Further, the lower end portion 51 a of the main body 51 functions as a signal line contact portion that contacts the signal line electrode 61 of the external electrode 60 of the printed circuit board 100. The second connection member 50 can also be formed by cold forging, for example.

The grounding member 40 is a member for contacting the grounding electrode 62 or 62a, 62b of the electrodes 60 of the printed circuit board 100 to be contacted and grounding the shield wire 73 of the coaxial cable 70. In addition, as described above, the grounding member 40 can be moved in the vertical direction so that the first housing 31 and the second housing 36 can move relatively along the center line O ₁ -O ₁ of the contact 10. This is a member for connecting the first housing 31 and the second housing 36.

  The grounding member 40 is punched out of a conductive thin metal plate by a press or the like as shown in the developed view of FIG. 4, and finally formed into a cylindrical shape as shown in FIG. The grounding member 40 includes a first fixing part 41, a first spring part 42, a second fixing part 43, and a second spring part 44.

  The first fixing portion 41 of the grounding member 40 is formed with a fitting hole 46 that fits into the protrusion 32 of the first housing 31 at an appropriate location. The grounding member 40 and the first housing 31 are positioned relative to each other by the engagement between the protrusion 32 of the first housing and the fitting hole 46 of the first fixing portion 41, and the first housing is located above the grounding member 40. 31 is arranged and fixed. Thereby, relative rotation between the first fixing portion 41 of the grounding member 40 and the first housing 31 is prevented. As shown in FIG. 4, the left and right ends of the developed first fixing portion 41 are abutted and formed into a cylindrical shape. Therefore, in FIG. 4, the width (the left and right lengths in FIG. 4) of the first fixing portion 41 is equal to the outer peripheral length of the first housing 31.

  The second fixing portion 43 of the grounding member 40 is formed with a fitting hole 47 that fits into the protrusion 37 of the second housing 36 at an appropriate location. The grounding member 40 and the second housing 36 are positioned with respect to each other by the engagement between the protrusion 37 and the fitting hole 47, and the second housing 36 is disposed inside the grounding member 40 with a distance h therebetween. And prevents relative rotation between the two. As shown in FIG. 4, the left and right ends of the developed second fixing portion 43 are abutted and formed into a cylindrical shape. Therefore, in FIG. 4, the width of the second fixing portion 43 (the left and right lengths in FIG. 4) is equal to the outer peripheral length of the second housing 36, and as a result, equal to the width of the first fixing portion 41.

  The first spring portion 42 of the grounding member 40 is formed between the first fixing portion 41 and the second fixing portion 43 as shown in the development view shown in FIG. The 2nd fixing | fixed part 43 is connected.

  The first spring portion 42 is formed as a plurality (eight in the present embodiment) of linear bodies 42a having an appropriate inclination angle θ1, and slits 48 are provided between the linear bodies 42a. The plurality of linear bodies 42a and the plurality of slits 48 are formed in parallel to each other. When the grounding member 40 is formed in a cylindrical shape, the first spring portion 42 is formed into a shape having a plurality of coil springs as shown in FIG. 1 by winding a plurality of linear bodies 42a. In the present embodiment, the first spring portion 42 is formed to be inclined downward to the right in FIG. 4, but is not limited thereto. That is, the 1st spring part 42 may be formed in the lower left. In addition, the inclination angle θ1, the number, the thickness, and the length of each of the linear bodies 42a are the contact pressure between the second connection member 50 and the signal line electrode 61 of the electrode 60 of the printed circuit board 100, as will be described later. Is set to a desired value.

In this way, by providing the first spring portion 42, the first housing 31 fixed to the first fixing portion 41 is in the first spring portion 42 with respect to the second housing 36 fixed to the second fixing portion 43. It becomes possible to be pushed down against the spring force (elastic force). At this time, it will be understood that the second housing 36 and the second fixing portion 43 rotate with respect to the first fixing portion 41 and the first housing 31. Accordingly, the contact portion 51a of the second connection member 50 fixed to the second housing 36 also rotates, and the contact portion 51a wipes the contact surface of the signal line electrode 61 of the external electrode 60 of the printed circuit board 100. It becomes possible. In the present embodiment, since the first spring portion 42 is formed so as to be lowered to the right, the second housing 36 and the second fixing portion 43 are located with respect to the center line O ₁ -O ₁ of the contact 10 in FIG. Rotate clockwise.

  Next, the second spring portion 44 of the grounding member 40 is provided under the second fixing portion 43 as shown in the development view shown in FIG. Accordingly, the lower end 45 of the second spring portion 44 is formed as a free end and functions as a ground contact portion that contacts the ground electrode 62 or 62a, 62b of the electrode 60 of the printed circuit board 100.

  The second spring portion 44 is formed as a plurality (two in the present embodiment) of linear bodies 44a having an appropriate inclination angle θ2 and parallel to each other.

When the grounding member 40 is formed in a cylindrical shape, the second spring portion 44 has two linear bodies 44a wound thereon, so that the two spring portions 44 are arranged at opposing positions as shown in FIG. It is formed in a shape having a coil spring. As a result, the lower end 45 of the second spring portion 44 can elastically contact the grounding electrode 62 or 62a, 62b of the electrode 60 of the printed circuit board 100 as a grounding contact portion. When the first fixing portion 41 is pushed down against the second fixing portion 43 against the elastic force of the first spring portion 42, the second spring portion 44 has the center line O of the contact 10. _1- O ₁ rotates as it rotates clockwise. Since the second spring portion 44 rotates in this way, the lower end 45 of the second spring portion 44 can wipe the contact surface of the ground electrode 62, 62a or 62b of the electrode of the printed circuit board 100.

  In the present embodiment, the second spring portion 44 is formed so as to be inclined leftward in FIG. 4, but is not limited thereto. That is, the 2nd spring part 44 may be formed in the lower right.

In addition, the inclination angle θ2 of the linear body 44a, the number of the linear bodies 44a, the thickness, and the length of each, the lower end 45 of the second spring portion 44 and the grounding electrode 62 or 62a of the electrode 60 of the printed circuit board 100, as described later The contact pressure with 62b is set to a desired value. However, the length of the second spring portion 44 is lower than the contact portion 51a of the second connection member 50 by a distance s ₁ when the lower end 45 of the linear body 44a of the second spring portion 44 is assembled as the connector 10. It is preferable to set so that it may be located in. By configuring the second spring portion 44 in this way, the lower end 45 of the second spring portion 44 as a contact for grounding is always connected to the contact portion 51a of the second connection member 50 as a contact for signal line. The electrode 60 contacts the grounding electrode 62 before contacting the signal line electrode 61. Thereby, the coaxial cable 70 can be electrically connected to the printed circuit board 100 in a stable state at all times.

  An example of a method for connecting the coaxial contact 10 having the configuration as described above to one end of the coaxial cable in this embodiment will be introduced here.

  First, one end of the coaxial cable 70 is cut, and then only the coating 74 is cut from the cut end to an appropriate length to expose the shield wire 73 as a shield to the front. Next, the shield wire 73 is folded back, the insulator 72 is exposed to the front, and only the insulator 72 is cut from the cut end to an appropriate length. The core wire 71 as a signal line that appears as a result is inserted into the insertion hole 25 of the first connection member 20, and is crimped as in the present embodiment, or soldered, laser welded, or the like to form the first connection member 20 and the core wire 71. And connect.

  On the other hand, the telescopic body 30 is assembled in advance. Specifically, as shown in FIG. 4, the left and right ends of the first fixing portion 41 and the second fixing portion 43 of the pressed grounding member 40 are attached to form the grounding member 40 in a cylindrical shape. The first housing 31 and the second housing 36 to which the second connecting member 50 is attached are respectively fixed at predetermined positions above and below the cylindrical grounding member 40 with an interval h.

  Subsequently, the first connecting member 20 is press-fitted into the through hole 33 of the first housing 31 constituting the telescopic body 30 in which the first connecting member 20 has been assembled in advance. At this time, the sliding pin 22 of the first connection member 20 is elastically held between the pair of elastic holding pieces 52 a and 52 b of the second connection member 50. That is, the sliding pin 22 of the first connection member 20 is held so as to be slidable in the vertical direction and rotatable with respect to the pair of elastic clamping pieces 52 a and 52 b of the second connection member 50.

  In this state, the folded shield wire 73 is restored. As a result, the shield wire 73 surrounds the outer periphery of the first fixing portion 41 of the grounding member 40 constituting the extendable body 30. Thereafter, the overlapping portion of the shield wire 73 and the first fixing portion 41 and the one end portion of the coaxial cable 70 are covered with the sleeve 15, and these are integrated by crimping or reflow soldering by caulking 16 as in the present embodiment. Fixed to. As a result, the shield wire 73 and the first fixing portion 41 are also electrically connected.

  In this way, the connection of the coaxial contact 10 to one end of the coaxial cable 70 is completed as shown in FIGS.

  Next, as described above, the axial displacement and the signal line contact through the first spring portion 42 and the second spring portion 44 of the coaxial contact 10 assembled and connected to one end portion of the coaxial cable 70. The contact force of the external electrode 60 of the printed circuit board 100 of the part 51a and the ground contact part 45 to the corresponding signal line electrode 61 and grounding electrode 62 or 62a, 62b will be briefly described with reference to FIGS. .

6A to 6C show the displacement of the first spring portion 42 and the second spring portion 44 formed in the grounding member 40 in the direction of the central axis O ₁ -O _1, and the signal line contact portion associated with the displacement. It is the schematic for demonstrating the relationship of the contact pressure with respect to each of the signal line electrode 61 and the grounding electrode 62 or 62a, 62b of two contact parts of 51a and the grounding contact part 45. FIG.

Here, the spring constants of the coil springs formed in the first spring part 42 and the second spring part 44 are respectively K and k. Further, as described above, the distance between the ground contact portion 45 and the signal line contact portion 51a is s ₁ .

  FIG. 6A shows a state at the moment when the ground contact 45 is in contact with the ground electrode 62 or 62a, 62b. In this state, the coil spring formed in each of the first spring portion 42 and the second spring portion 44 is not displaced at all.

When the coaxial contact 10 is pushed down along the central axis O ₁ -O ₁ , the coil springs formed in the first spring part 42 and the second spring part respectively are compressed and deformed. As a result, FIG. ), The signal line contact portion 51a contacts the signal line electrode 61. At this time, the displacement of the coil spring formed in the first spring portion 42 is s ₂ . The displacement of the coil spring formed in the second spring portion 44 is s ₁ . Further, the force applied to the coil springs formed in the first spring portion 42 and the second spring portion is the same, and this is P ₀ .

Assuming that the entire displacement by the first and second spring portions 42 and 44 is δ ₀ , P ₀ = ks ₁ = Ks ₂ and δ ₀ = s ₁ + s ₂ are established.

From the state of FIG. 6B to the state shown in FIG. 6C, the coaxial contact 10 is further pushed down along the central axis O ₁ -O ₁ . At this time, since the signal line contact portion 51a does not move any more, the second spring portion provided below the second fixed portion 43 formed integrally with the signal line contact portion 51a. The coil spring formed on 44 is not displaced. However, the sliding pin 22 of the first connecting member 20 disposed via the first spring portion 42 is movable in the axial direction with respect to the second connecting member 50 including the signal line contact portion 51a, and Since it is rotatable, the coil spring formed in the first spring portion 42 is compressed and displaced, and the spring force generated thereby is applied only to the signal line contact portion 51a.

When the displacement amount of the coil spring formed in the first spring portion 42 at this time is δ ₁ and the force applied to the signal line contact portion 51 is P ₁ , P = P ₀ + P ₁ , δ = δ ₀ + δ ₁ , P ₁ = Kδ ₁ holds. P is a force applied to the coil spring formed in the first spring portion 42, and δ is a total displacement amount due to a desired amount of deformation of the first and second spring portions 42 and 44.

Here, it is clear that P ₀ and P ₁ indicate contact pressures at the ground contact point 45 and the signal line contact point 51a, respectively. Therefore, k, K, and s ₁ are set so that a desired contact pressure (contact pressure) can be obtained.

  FIG. 7 is a graph showing the relationship between the force applied to the coil springs formed on the first and second spring portions 42 and 44 and the displacement thereof. In FIG. 7, K ′ is a composite during the time when both the first spring portion 42 and the second spring portion 44 are displaced simultaneously, that is, during the displacement from the state of FIG. 6 (a) to the state of FIG. 6 (b). Spring constant.

(Second Embodiment)
8 is a front view of a coaxial contact according to a second embodiment of the present invention, FIG. 9 is a cross-sectional view of the coaxial contact shown in FIG. 8, and FIG. 10 is a coaxial type shown in FIG. It is an expanded view of the grounding member which comprises a contact. FIG. 11 shows three examples (a), (b), and (c) of the first connecting member constituting the coaxial contact shown in FIG.

  The coaxial contact 110 according to the second embodiment of the present invention is different from the coaxial contact 10 according to the first embodiment except that the first connection member and the second connection member are different. Are almost the same. Hereinafter, an outline of the coaxial contact 110 according to this embodiment will be described.

A coaxial contact 110 (hereinafter simply referred to as “contact 110”) according to the second embodiment of the present invention is also provided at one end of the coaxial cable 70, and the electrode 60 of the printed circuit board 100 to be contacted (FIG. 5). The first embodiment is the same as the first embodiment in that it is pressed downward along the central axis O ₁ -O ₁ of the contact 110 to electrically connect the coaxial cable 70 and the printed circuit board 100.

  The contact 110 according to this embodiment also includes a sleeve 115, a first connection member 120, and an extendable body 130.

  The sleeve 115 has the same configuration as the sleeve 15 in the first embodiment.

The first connecting member 120 is a member attached to the end of the core wire 71 of the coaxial cable 70, and is the same as the first embodiment in that it is electrically connected to a second connecting member 150 described later. . Therefore, the first connection member 120 is formed from a conductive metal material. The first connection member 120 in the present embodiment is the above-described in that the first connection member 120 is disposed so as to be vertically movable and rotatable along the central axis O ₁ -O ₁ of the contact 10 with respect to the second connection member 50. It is not different from the first embodiment.

  As shown in FIG. 11B, the first connection member 120 in this embodiment includes a cylindrical main body 121 and a pair of elastic clamping pieces 124 a and 124 b extending below the cylindrical main body 121. One end of the core wire 71 of the coaxial cable 70 is inserted into the cylindrical main body 121 of the first connecting member 120 at one end (in this embodiment, the upper end), and the other end (the lower end in this embodiment). , A through-hole 125 that is continuous with the pair of elastic clamping pieces 124a and 124b is formed. A contact pin 151 of a second connecting member 150 described later is elastically sandwiched between the pair of elastic clamping pieces 124a and 124b. Accordingly, the first connection member 120 and the second connection member 150 are connected to each other so as to be movable in the vertical direction and to be rotatable, and even if the first connection member 120 and the second connection member 150 are relatively moved or rotated, The connecting member 150 is always electrically connected. The pair of elastic clamping pieces 124a and 124b are arranged symmetrically via the slit 126, and in the no-load state in which the contact pin 151 of the second connection member 150 is not clamped, the interval between the slits 126 increases as it goes downward. It is formed to be narrowed.

  The first connection member 120 of the present embodiment has a cylindrical shape having a through-hole 125 at its upper end, and is configured to include elastic clamping pieces 124 a and 124 b that are symmetrically arranged with the slit 126 at its lower end. Has been. However, the configuration of the first connection member 120 is not necessarily limited to such a configuration. For example, as illustrated in FIG. 11C, a cutout 123 may be formed on the side of the through hole 125 at the upper end of the first connection member 120. Thus, by forming the notch 123, the connection by the soldering etc. to the 1st connection member 120 of the core wire 71 of the coaxial cable 70 can be performed easily. In addition, as long as it is slidable and rotatable with respect to the second connection member 150 and can maintain electrical connection, the first connection member 120 can be connected as shown in FIG. The lower end may have a structure of a cylindrical body 124 into which the contact pin 151 of the second connection member 150 is fitted.

  Next, the telescopic body 130 includes a first housing 131, a second housing 136, a second connection member 150, and a grounding member 140.

  The first housing 131 is made of an electrically insulating synthetic resin, is formed in a substantially cylindrical shape having a through-hole 133 penetrating vertically, and has at least one on the outer periphery (in the present embodiment, facing each other). Two protrusions (not shown) are formed at the positions. The main body 121 of the first connection member 120 is press-fitted into the through hole 133 of the first housing 131, whereby the first connection member 120 is fixed to the first housing 131. The method of fixing the first connecting member 120 to the first housing 131 is not limited to press-fitting, and may be executed by using an adhesive or in combination with press-fitting, for example.

  Similarly, the second housing 136 is made of an electrically insulating synthetic resin, is formed in a substantially cylindrical shape having a through-hole 138 penetrating vertically, and has at least one outer periphery (in this embodiment, 2 In addition, protrusions (not shown) are formed at opposite positions. The outer diameter of the second housing 136 is the same as the outer diameter of the first housing 131.

  A contact pin 151 of a second connection member 150 to be described later is press-fitted into the through hole 138 of the second housing 136, whereby the second connection member 150 is fixed to the second housing 136. The method of fixing the second connecting member 150 to the second housing 136 may also be performed by using an adhesive or by combining with press fitting. The second connecting member 150 includes a second housing 136 such that a contact portion 151 a which is a tip (lower end) of the contact pin 151 of the second connecting member 150 protrudes from the lower end of the second housing 136 by an appropriate length. Fixed to.

As shown in FIG. 9, the first housing 131 and the second housing 136 have a distance h through a grounding member 140 described later, and are arranged along the central axis O ₁ -O ₁ of the contact 110. It is connected so that it can move. Thereby, a contact pin 151 of the second connection member 150 fixed to the second housing 136 described later contacts between a pair of elastic clamping pieces 124 a and 124 b of the first connection member 120 fixed to the first housing 131. 110 can move in the vertical direction along the central axis O ₁ -O ₁ . The contact pin 151 of the second connection member 150 can also rotate around the central axis O ₁ -O ₁ of the contact 110 between the pair of elastic clamping pieces 124 a and 124 b of the first connection member 120.

The second connection member 150 is a member that contacts the signal electrode 61 among the electrodes 60 of the printed circuit board 100 that is a contact target and electrically connects the coaxial cable 70 and the printed circuit board 100. Therefore, the second connection member 150 is formed from a conductive metal material. As described above, the second connection member 150 is disposed so as to be movable in the vertical direction and rotatable along the central axis O ₁ -O ₁ of the contact 10 with respect to the first connection member 120.

  The second connection member 150 includes a cylindrical contact pin 151 having a contact portion 151 a that functions as a signal line contact portion that contacts the signal electrode 61 of the printed circuit board 100 at the tip (lower end) thereof. The upper end of the contact pin 151 is formed as an elongated sliding pin extending upward, and when the telescopic body 130 is assembled, as described above, between the pair of elastic clamping pieces 124a and 124b of the first connecting member 120. Is slidably and rotatably held between the two.

The grounding member 140 is a member for contacting the grounding electrode 62 or 62a, 62b of the electrodes 60 of the printed circuit board 100 to be contacted and grounding the shield wire 73 of the coaxial cable 70. As described above, the grounding member 40 is also configured so that the first housing 131 and the second housing 136 can move in the vertical direction relatively along the center line O ₁ -O ₁ of the contact 110. This is a member for connecting the first housing 131 and the second housing 136.

  The grounding member 140 in this embodiment is stamped from a conductive thin metal plate by a press or the like as shown in the development view of FIG. 10, and finally formed into a cylindrical shape as shown in FIG. Is done. The grounding member 140 includes a first fixing part 141, a first spring part 142, a second fixing part 143, and a second spring part 144.

  Although not shown, the first fixing portion 141 of the grounding member 140 is preferably formed with a fitting hole that fits the protrusion of the first housing 131 at an appropriate location. As in the first embodiment, the grounding member 140 and the first housing 131 are positioned with each other and the relative rotation between the two is prevented by the engagement between the protrusion and the fitting hole.

  It is preferable that the second fixing portion 143 of the grounding member 140 is also formed with a fitting hole for fitting the protrusion of the second housing 136 at an appropriate location. The engagement between the protrusion and the fitting hole positions the grounding member 140 and the second housing 136 relative to each other and prevents relative rotation between the two. In FIG. 10, the width of the second fixing portion 143 (the left and right lengths in FIG. 10) is equal to the width of the first fixing portion 141.

  The first spring portion 142 of the grounding member 140 in this embodiment is formed between the first fixing portion 141 and the second fixing portion 143 as shown in the development view shown in FIG.

  The first spring portion 142 is formed as a plurality of (six in this embodiment) linear bodies 142a having an appropriate inclination angle θ1, and slits 148 are provided between the linear bodies 142a. The plurality of linear bodies 142a and the plurality of slits 148 are formed in parallel to each other. When the grounding member 140 is formed in a cylindrical shape, the first spring portion 142 is formed in a shape having a plurality of coil springs as shown in FIG. 8 by winding a plurality of linear bodies 142a. Is the same as in the first embodiment. In the present embodiment, each linear body 142a of the first spring portion 142 is formed with linear portions 142b and 142c extending vertically in the upper and lower portions in FIG. By forming such straight portions 142b and 142c, the elastic force of the coil spring formed in the first spring portion 142 is slightly increased.

  As described above, by providing the first spring portion 142, the first housing 131 fixed to the first fixing portion 141 has the first spring portion 142 with respect to the second housing 136 fixed to the second fixing portion 143. It becomes possible to be pushed down against the spring force (elastic force). At this time, the second housing 136 and the second fixing portion 143 rotate with respect to the first fixing portion 141 and the first housing 131. As a result, the contact portion 151 a of the second connection member 150 fixed to the second housing 136 also rotates, and the contact portion 151 a wipes the contact surface of the signal line electrode 61 of the external electrode 60 of the printed circuit board 100. It becomes possible.

  Next, the second spring portion 144 of the grounding member 140 is provided below the second fixing portion 143 as shown in the development view of FIG. The lower end 145 of the second spring portion 144 is formed as a free end and functions as a ground contact portion that contacts the ground electrode 62 or 62a, 62b of the electrode 60 of the printed circuit board 100.

  The second spring portion 144 is formed as a plurality of (two in the present embodiment) linear bodies 144a having an appropriate inclination angle θ2 and parallel to each other.

  When the grounding member 140 is formed in a cylindrical shape, the second spring portion 144 is formed by winding two linear bodies 144a so that, as illustrated in FIG. It is formed in a coil spring. Thereby, the lower end 145 of the second spring portion 144 can be elastically contacted with the grounding electrode 62 or 62a, 62b of the electrode 60 of the printed circuit board 100 as a grounding contact portion. In addition, since the second spring portion 144 rotates in this way, the lower end 145 of the second spring portion 144 can wipe the contact surface of the grounding electrode 62, 62a or 62b of the electrode of the printed circuit board 100. .

The inclination angle θ2, the number, and the thickness and length of each of the linear bodies 144a are determined by the contact pressure between the lower end 145 of the second spring portion 144 and the grounding electrode 62 or 62a, 62b of the electrode 60 of the printed circuit board 100. It is set to a desired value. The length of the second spring portion 144 in this embodiment is also the distance s ₁ from the lower end 151a of the second connection member 150 when the lower end 145 of the linear body 144a of the second spring portion 44 is assembled as the connector 110. It is preferable that it is set so as to be positioned only downward.

  The method for connecting the coaxial contact 110 having the configuration as described above to one end of the coaxial cable 70 in the present embodiment is the same as that in the first embodiment, and the description thereof is omitted.

  A plurality of coaxial contacts 10 or 110 according to the present invention described above are attached to a coaxial multi-core connector 200 as shown in FIG. 5) at the same time. Reference numeral 70 denotes a coaxial cable having one end connected to the coaxial contact 10. 210 designates the coaxial multicore connector 200, more specifically, the plurality of coaxial contacts 10 or 110 to which the coaxial multicore connector 200 is attached are simultaneously pressed against the corresponding electrodes provided on the printed circuit board 100. It is a configured control lever. Reference numeral 220 denotes a connector main body constituting the coaxial multicore connector 200, and reference numeral 221 denotes a coaxial contact housing space provided in the connector main body 220 for housing the coaxial contact 10 or 110.

1 is a front view of a coaxial contact according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the coaxial contact shown in FIG. 1. FIG. 2 is an exploded view of the coaxial contact shown in FIG. 1. It is an expanded view of the grounding member which comprises the coaxial contact shown by FIG. The pattern of the external electrode of the printed circuit board as a contact object which the coaxial contact which concerns on this invention contacts is shown, (a) has shown one pattern and (b) has shown another pattern. It is a figure for demonstrating the relationship between the deformation | transformation of two spring parts of the 1st spring part formed in the grounding member shown by FIG. 4, and the contact pressure in a contact part, and (a) is a 1st. 2 shows the moment when the contact point for grounding, which is the lower end of the spring part, contacts the printed circuit board; (b) shows the moment when the contact part for signal line, which is the lower end of the second connecting member, contacts the printed circuit board; c) shows a state in which the first spring portion and the second spring portion are deformed by a desired amount. It is a graph which shows the deformation | transformation of two spring parts and contact pressure which are formed in the grounding member shown by FIG. It is a front view of the coaxial contact which concerns on the 2nd embodiment of this invention. FIG. 9 is a cross-sectional view of the coaxial contact shown in FIG. 8. It is an expanded view of the grounding member which comprises the coaxial contact shown by FIG. Three examples (a), (b), and (c) of the first connecting member constituting the coaxial contact shown in FIG. 8 are shown. 1 shows an embodiment of a coaxial multi-core connector using a coaxial contact according to the present invention.

Explanation of symbols

10, 110 Coaxial contact 20, 120 First connecting member 21, 121 (first connecting member) main body 22 Sliding pin 30, 130 Extendable body 31, 131 First housing 36, 136 Second housing 40, 140 Grounding member 41, 141 1st fixed part 42, 142 1st spring part 43, 143 2nd fixed part 44, 144 2nd spring part 45, 145 Grounding contact part (lower end of 2nd spring part)
50, 150 Second connecting member 51 (second connecting member) main body 51a, 151a Signal line contact portion (lower end of second connecting member)
52a, 52b A pair of elastic pinching pieces 70 A coaxial cable 71 A core wire 73 A shield wire 124a, 124b A pair of elastic pinching pieces 151 (of the second connecting member) Contact pin 200 A coaxial multicore connector

Claims (6)

A coaxial contact provided at one end of the coaxial cable,
A first connecting member electrically connected to a core wire of the coaxial cable through which a signal is transmitted;
A cylindrical first housing in which the first connecting member is accommodated and fixed; a cylindrical second housing spaced apart from the first housing; and the second housing accommodated and fixed; A telescopic body including a second connection member electrically connected to the first connection member, and a grounding member electrically connected to the shield of the coaxial cable;
Comprising at least
The lower end of the second connecting member is configured as a signal line contact portion protruding from the lower end of the second housing, and the upper end of the second connecting member is slidable in the vertical direction with respect to the first connecting member and around the central axis. Connected to the
The grounding member is formed between a first fixing part to which the first housing is fixed, a second fixing part to which the second housing is fixed, and between the first fixing part and the second fixing part. 1 spring part, having a second spring part formed under the second fixing part,
The grounding member connects the first housing and the second housing at an interval via the first spring portion,
A coaxial contact, wherein a lower end of the second spring portion of the ground member is configured as a ground contact portion.   The coaxial contact according to claim 1, wherein the ground contact portion is disposed below the signal line contact portion.   The coaxial contact according to claim 1, wherein each of the first spring part and the second spring part is formed as a coil spring. The first connecting member has at least a main body to which the core wire of the coaxial cable is connected, and an elongated sliding pin extending below the main body,
The second connection member has a pair of elastic clamping pieces that elastically clamp the sliding pin of the first connection member at the upper end, and a signal line contact portion at the lower end. The coaxial contact according to any one of claims 1 to 3. The first connection member has at least a main body to which the core wire of the coaxial cable is connected, and a pair of elastic clamping pieces extending below the main body,
The second connecting member has, at its upper end, an elongated sliding pin extending upward that is elastically held between the pair of elastic holding pieces of the first connecting member, and at its lower end, a signal line contact 4. The coaxial contact according to claim 1, further comprising a portion.   A coaxial multi-core connector that accommodates a plurality of coaxial contacts according to any one of claims 1 to 5 and can simultaneously connect the plurality of coaxial contacts to corresponding electrodes of a printed circuit board.

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