JP7062342B2 - Coaxial electrical connector - Google Patents

Description

The present invention relates to a coaxial electric connector.

A coaxial electric connector (hereinafter referred to as "coaxial connector") is a type that is attached to the edge of a circuit board so that the axis of the coaxial connector is parallel to the circuit surface of the circuit board with respect to the edge of the circuit board. It is known and is disclosed in, for example, Patent Document 1.

In the coaxial connector of Patent Document 1, a central conductor is arranged via an insulator in an outer conductor having a cylindrical body having the axis, and the outer conductor is provided with a mounting flange overhanging in the radial direction. It is attached to the edge of the circuit board so that the surface of the mounting flange abuts on the end surface of the edge of the circuit board (the thick surface formed at right angles to the circuit surface). The mounting flange is provided with two pin-shaped positioning columns extending in parallel to the circuit surface on the circuit surface of the circuit board from that surface. Similar to the positioning support column, the central conductor protruding parallel to the circuit surface from the coaxial connector is located between them on the line connecting both of the two positioning support columns when viewed in the axial direction of the coaxial connector. are doing.

A movable block body can be mounted on the mounting flange by means of tightening screws so that the position can be adjusted with respect to the circuit board.

When using the coaxial connector, the mounting flange is positioned so that the two positioning columns are in contact with the circuit surface of the circuit board, and the movable block body is arranged below the circuit board to move the movable block body. With the block body pressed against the lower surface of the circuit board (the surface opposite to the circuit surface), the movable block body is fixed to the mounting flange by the tightening screw, and the position of the movable block body is fixed. As a result, the coaxial connector is fixed to the circuit board, and the central conductor located between the two positioning columns is pressed against the corresponding portion of the circuit surface of the circuit board to conduct electricity to the circuit board. Is connected.

Utility model registration No. 3119263

Thus, in Patent Document 1, since the movable block body is fixed to the mounting flange of the coaxial connector with the tightening screw in a state of being pressed against the circuit board, the coaxial connector is firmly fixed to the circuit board and is also fixed. The result is that the center conductor is reliably in contact with the circuit surface of the circuit board.

However, in Patent Document 1, there are some points that should be improved in terms of handling.

In Patent Document 1, the movable block body must be attached to the mounting flange of the coaxial connector with the tightening screw while maintaining the state of being pressed against the circuit board. That is, the operation of keeping the movable block body in a compressed state and the operation of tightening the tightening screw must be performed at the same time, and if there is a gap between the operations, the above result cannot be obtained.

In view of such circumstances, it is an object of the present invention to provide a coaxial electric connector in which a coaxial connector can be attached to the edge of a circuit board by only one attachment operation and the central conductor can be reliably contacted with the circuit surface. ..

In the rotating shaft electric connector according to the present invention, the central conductor is held in the outer conductor via an insulator, and the outer conductor is attached in a posture in which the axis is parallel to the upper surface of the circuit board on which the circuit surface is formed. The central conductor, which is attached to the edge of the circuit board and extends parallel to the circuit surface formed on the upper surface of the circuit board, comes into contact with the circuit surface in the plate thickness direction of the circuit board.

In such a coaxial electric connector (hereinafter referred to as “coaxial connector”), in the present invention, the outer conductor extends from the body portion of the outer conductor in the radial direction of the body portion and is located parallel to the plate thickness surface at the edge portion of the circuit board. It has a flange portion in which a screw body insertion hole is formed, and a support portion in which a substrate support surface is formed so as to face the upper surface of the substrate of the circuit board from the flange portion, and the mounting body is a circuit board. On the other plate surface side of the above, a mounting block into which a screw body inserted into a screw body insertion hole formed in a flange portion of an outer conductor is screwed is arranged between the mounting block and the other surface of a circuit board. The intervening member has a sandwiching portion having a surface for sandwiching the circuit board between the intervening member and the support portion of the external conductor, and a surface opposite to the sandwiching portion in the plate thickness direction. The mounting block has a pressed portion that is located at and receives a pressing force from the mounting block and a contact portion that contacts the flange portion, and the mounting block has a pressing portion that presses the pressed portion and is pressed. And at least one of the pressing portions has a component that directs the intervening member toward both the lower surface of the circuit board and the flange portion by tightening the screw body in the threaded body insertion hole of the flange portion and pulling the mounting block toward the flange portion. It is characterized by forming a slope that produces a pressing force.

In the present invention having such a configuration, when the coaxial connector is attached to the edge portion of the circuit board, first, the support portion of the external conductor is arranged on the upper surface of the substrate and the flange portion is the plate thickness surface at the edge portion of the circuit board. The mounting block is supported by loosely screwing the threaded body inserted into the threaded body insertion hole in the flange portion into the mounting block, and then the intervening member is attached to the mounting block. Place it between the circuit boards and tighten the mounting block with screws. Since at least one of the pressing portion of the mounting block and the pressed portion of the intervening member forms a slope, the intervening member is pressed against both the circuit board and the flange portion of the coaxial connector only by the tightening operation of the screw body. , The mounting block is fixed to the flange. In one operation of tightening the screw body described above, the force generated on the slope existing between the mounting block and the intervening member enables the coaxial connector to be attached to the circuit board and the center conductor to be connected, and the intervening member. The contact pressure with respect to the flange portion in the contact portion is increased, the gap between the flange portion and the mounting block is completely eliminated, and the shielding property is ensured.

In the present invention, as described above, an intervening member is disposed between the mounting block and the circuit board, and the intervening member is simply attached to the flange portion by tightening the screw body, and the intervening member is the flange portion of the circuit board and the coaxial connector. Since it is decided that the pressure is applied to both of the above, the coaxial connector can be attached to the circuit board and the center conductor can be connected and the shielding property can be ensured by only one operation of tightening the screw body.

A state in which a coaxial connector as an embodiment of the present invention is attached to an edge portion of a circuit board is shown, (A) is an upper perspective view, and (B) is a lower perspective view. FIG. 2 is a side view of the coaxial connector in the state shown in FIG. It is sectional drawing in the plane including the axis of the coaxial connector shown in FIG. It is sectional drawing at the position of one screw body which shows each member of the coaxial connector shown in FIG. 2 separately.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1A and 1B show a state in which a coaxial connector as an embodiment of the present invention is attached to an edge of a circuit board, FIG. 1A is an upper perspective view thereof, and FIG. 1B is a lower perspective view. 1 is a side view of the coaxial connector of FIG. 1, FIG. 3 is a cross-sectional view of the surface including the axis of the coaxial connector, and FIG. 4 is a position of one screw body showing each member of the coaxial connector of FIG. 2 separately. It is a cross-sectional view in.

As seen in FIG. 3, the coaxial connector 1 in the present embodiment is attached to the center conductor 11, the outer conductor 12, the insulator 13 interposed between the center conductor 11 and the outer conductor 12, and the outer conductor 12, and is a circuit. It has a mounting body 14 that increases the contact pressure between the substrate P and the center conductor 11. The circuit board P is formed with a circuit portion P1-1 connected to the central conductor 11 of the coaxial connector 1 on the upper surface P1 of the board (see FIG. 1A).

The central conductor 11 is made of a metal material, is located on the central axis of the coaxial connector 1 (an axis extending parallel to the upper surface P1 of the substrate), and has a long shaft shape in the axis direction. As seen in FIG. 3, the central conductor 11 sequentially forms the large diameter portion 11A, the medium diameter portion 11B, and the small diameter portion 11C in a stepped manner. The large diameter portion 11A forms a hollow sleeve 11A-2 having a hollow portion 11A-1 extending from the shaft end (left end in the figure) of the large diameter portion 11A on the central axis. The hollow sleeve 11A-2 has slits 11A-3 extending in the axial direction at a plurality of positions in the circumferential direction formed from the shaft end to the intermediate position in the axial direction, and the intermediate sleeve 11A-2 has elasticity in the radial direction. When the corresponding pin-shaped center conductor of the mating connector (not shown) enters the hollow portion 11A-1, the pin-shaped center conductor receives a contact pressure outside the radius to elastically deform and expand the diameter. In this large diameter portion 11A, small holes 11A-4 penetrating in the radial direction are formed at a plurality of positions in the circumferential direction at the deepest portion of the hollow portion 11A-1 in the axial direction and communicate with the hollow portion 11A-1. There is.

The medium-diameter portion 11B is stepped from the large-diameter portion 11A to reduce the diameter and extends straight in the axial direction.

The end portion of the medium diameter portion 11B is transferred to the small diameter portion 11C via a tapered portion that reduces the diameter, and the small diameter portion 11C extends straight in the axial direction.

The outer conductor 12 is made of a metal material, and as seen in FIG. 3, a cylindrical body portion 12A having the same axis as the axis of the central conductor 11 and an axial end portion of the body portion 12A from the body portion 12A. It has a flange portion 12B that projects outward in the radial direction, and a support portion 12C that extends from the flange portion 12B so as to face the substrate upper surface P1 at the edge portion of the circuit board P.

The body portion 12A of the outer conductor 12 is provided with a coupling screw portion 12A-1 for screwing and coupling the outer conductor of the mating connector to a part of the outer peripheral surface in the axial direction. The inside of the body portion 12A is divided into a large inner diameter inlet side space 12A-2 located on the left side and a back side space 12A-3 located on the right side in FIG. 3 with a slight difference in inner diameter at the intermediate position in the axial direction. There is. The step portion forming the boundary between the entrance side space 12A-2 and the back side space 12A-3 is located within the range of the coupling screw portion 12A-1 in the axial direction.

As seen in FIG. 3, the flange portion 12B projects radially from the body portion 12A, and particularly projects downward and laterally (in a direction perpendicular to the paper surface) (FIGS. 1 (A), (FIG. 1 (A),). See also B)). As can be seen in FIG. 3, the flange portion 12B has a screw mounting portion 12B-1 protruding downward, and the screw mounting portion 12B-1 has a screw body insertion hole through which a screw body described later is inserted. 12B-2 is formed. The inner diameter surface of the threaded body insertion hole 12B-2 may be an internal threaded surface into which the threaded body is screwed, or may be a simple inner surface of a cylinder.

The support portion 12C of the outer conductor 12 is an upper portion opposite to the screw mounting portion 12B-1 in the vertical direction with respect to the central axis, and faces the substrate upper surface P1 of the circuit board P in the axial direction from the flange portion 12B. It is provided so as to extend to. The lower surface of the support portion 12C forms a substrate support surface 12C-1 that supports the circuit board P when the substrate upper surface P1 of the circuit board P is pressed from below by the intervening member 14A described later. The support portion 12C, together with the flange portion 12B, has a shape in which the upper side is cut off and forms a flat surface 12C-2 parallel to the surface of the circuit board P (see also FIGS. 1A and 1B). The support portion 12C has a recess 12C-3 that penetrates downward from the flat surface 12C-2, that is, extends to the substrate support surface 12C-1 that supports the circuit board P from above, and opens toward the axial end portion. It is formed (see FIG. 1 (A)). As seen in FIG. 3, the recess 12C-3 is located at a position including the tip end portion of the small diameter portion 11C of the center conductor 11, and the circuit board portion P1 on the substrate upper surface P1 of the circuit board P where the tip end portion of the center conductor is located. The contact state with -1 can be visually observed from above through the recess 12C-3.

As can be seen in FIG. 3, the center conductor 11 located within the inner diameter of the outer conductor 12 has a large diameter portion 11A, a medium diameter portion 11B, and a small diameter portion 11C in order to have a smaller diameter toward the tip. In order to maintain an appropriate impedance with the conductor 11, the inner space 12A-3 is also stepped, and the inner diameter is gradually reduced to the position at the tip of the small diameter portion 11C of the center conductor 11. ing. Since the relationship between the inner diameter of the central conductor 11 and the inner diameter of the outer conductor 12 for appropriately securing this impedance is not the main subject of the present invention, further description thereof will be omitted.

In the insulator 13, the ring-shaped large-diameter insulator 13A and the small-diameter insulator 13B are arranged at two positions separated from each other in the axial direction between the outer peripheral surface of the central conductor 11 and the inner peripheral surface of the outer conductor 12. The central conductor 11 is held by the outer conductor 12 via the insulator 13. In the axial direction, the large-diameter insulator 13A is located at the medium-diameter portion 11B of the central conductor 11, and the small-diameter insulator 13B is located at the small-diameter portion 11C of the central conductor 11.

The mounting body 14 has an intervening member 14A made of a metal material, a mounting block 14B arranged in contact with the intervening member 14A, and a screw body 14C screwed into the mounting block 14B.

As seen in FIGS. 2 and 3, the intervening member 14A includes a holding portion 14A-1 in contact with the lower surface of the circuit board P, which is opposite to the support portion 12C of the outer conductor 12 with respect to the circuit board P, and the outer conductor 12. It has a contact portion 14A-2 in contact with the surface of the flange portion 12B (the right surface in FIGS. 2 and 3), and a pressed portion 14A-3 pressed from the mounting block 14B described later. In the present embodiment, the intervening member 14A has a flat surface in which the upper surface holding portion 14A-1 is in contact with the lower surface of the circuit board P, and the contact portion 14A-2 is external. It is formed so as to project toward the flange portion 12B at the upper part of the side surface of the conductor 12 facing the surface of the flange portion 12B, and may come into contact with the surface of the flange portion 12B with a surface having a certain range or an edge. May be contacted at the top of the line. Further, the pressed portion 14A-3 is formed as a slope on the lower surface of the intervening member 14. In the present embodiment, the slope of the pressed portion 14A-3 is formed as a surface that faces downward as it approaches the flange portion 12B in the axial direction.

The mounting block 14B has a screw hole 14B-1 to which the screw body 14C is screwed, and also has a pressing portion 14B-2 having a slope facing the pressed portion 14A-3 of the above-mentioned intervening member 14A. are doing. The mounting block 14B may be made of a metal material or another material, but is desired to be rigid.

In the example shown in FIGS. 2 and 3, the pressing portion 14B-2 of the mounting block 14B and the pressed portion 14A-3 of the above-mentioned intervening member 14A are in contact with each other on their slopes. In the invention, the present invention is not limited to this, and it is sufficient that at least one of the pressed portion 14B-2 and the pressed portion 14A-3 forms a slope.

In the present embodiment, the screw body 14C has a head portion 14C-1 and a screw shaft portion 14C-2 on which an external screw is formed. The material of the screw body 14C is preferably metal, although it is not limited, as long as the strength is sufficient. The head portion 14C-1 has an outer diameter larger than the inner diameter of the screw body insertion hole 12B-2 formed in the flange portion 12B of the outer conductor 11, and the screw shaft portion 14C-2 is the screw of the mounting block 14B. An external screw to be screwed into the hole 14B-1 is formed.

In the present embodiment, the screw body 14C has a head portion 14C-1 and a screw shaft portion 14C-2, but the screw body 14C is not limited to this, and a nut may be screwed into the screw shaft portion. In that case, the nut may be provided not only on one end side of the screw shaft portion but also on the other end side.

Next, the usage procedure for the coaxial connector 1 of the present embodiment will be described with reference to FIGS. 2 to 4. Here, FIG. 4 shows the circuit board P, the outer conductor 12 holding the central conductor 11 in FIG. 2 via the insulator 13, the intervening member 14A forming the mounting body 14, the mounting block 14B, and the screw body 14C. It is sectional drawing at the position of the screw body 14C in the state before mounting on a circuit board P, which separated from each other.

First, in preparation for mounting the coaxial connector 1 on the circuit board P, the circuit board P, the separated external conductor 12, the intervening member 14A, the mounting block 14B, and the screw body 14 are prepared as shown in FIG.

Next, the outer conductor 12 is brought into contact with the substrate support surface 12C-1 of the support portion 12C of the outer conductor 12 on the substrate upper surface P1 at the corresponding edge portion of the circuit board P, and the flange portion 12B is the corresponding edge of the circuit board P. Position it so that it abuts on the end surface (surface in the plate thickness direction) of the portion.

Next, the mounting block 14B is arranged below the circuit board P, and the threaded body 14C is attached to the flange portion 12B from the side opposite to the position of the mounting block 14B with respect to the flange portion 12B while maintaining the state. The insertion hole 12B-2 is inserted and loosely screwed into the screw hole 14B-1 of the mounting block 14B to temporarily hold the mounting block 14B.

Further, for example, the intervening member 14A is inserted between the circuit board P and the mounting block 14B in the temporarily held state in a direction perpendicular to the paper surface of FIG. 4, and the intervening member 14A is formed on the upper surface of the intervening member 14A. The sandwiching portion 14A-1 is positioned so as to face the lower surface of the circuit board P, and the contact portion 14A-2 of the intervening member 14A faces the flange portion 12B. As a result, the pressed portion 14A-3 on the lower surface of the intervening member 14A and the pressed portion 14B on the upper surface of the mounting block 14B are positioned so as to face each other.

Thus, the external conductor 12, the intervening member 14A, the mounting block 14B, and the screw body 14C are located in the state shown in FIG. 3 with respect to the circuit board P. Here, the small diameter portion 11C of the central conductor 11 protruding from the outer conductor 12 is located on the circuit portion P1-1 on the substrate upper surface P1 of the circuit board P.

Next, the head portion 14C-1 of the screw body 14C is rotated in the direction of tightening the screw body 14C. By tightening the screw body 14C, the mounting block 14B in the temporarily held state is strongly pulled toward the flange portion 12B of the outer conductor 12 and is firmly held. When the mounting block 14B is pulled toward the flange portion 12B, the above is described between the pressed portion 14A-3 of the intervening member 14A and the pressing portion 14B-2 of the mounting block 14B which are in contact with each other on an inclined surface. The contact force (pushing pressure) acts in the direction perpendicular to the slope. This contact force produces an upward component force toward the circuit board P and a lateral component force toward the flange portion 12B with respect to the pressed portion 14A-3 of the intervening member 14A. The upward component force sandwiches the circuit board P between the sandwiching portion 14A-2 of the intervening member 14A and the supporting portion 12C-3 of the outer conductor 12, and with the circuit board P1-1 on the substrate upper surface P1 of the circuit board P. The contact pressure between the small diameter portion 11C of the central conductor 11 is increased, and the lateral component force increases the contact force between the contact portion 14A-2 of the intervening member 14A and the flange portion 12B. Thus, the small diameter portion 11C of the central conductor 11 strengthens the contact with the circuit portion P1-1 of the circuit board P, and the high contact force between the contact portion 14A-2 of the intervening member 14A and the flange portion 12B between the two. Shielding is enhanced. Thus, mounting the coaxial connector 1 to the circuit board P is easy with only one operation of tightening the screw body 14C after arranging the external conductor 12, the intervening member 14A, the mounting block 14B, and the screw body 14C at predetermined positions. (See FIGS. 1 (A) and 1 (B), FIGS. 2 and 3).

1 Coaxial connector 11 Center conductor 12 External conductor 12A Body part 12B Flange part 12B-2 Threaded body insertion hole 12C Support part 13 Insulator 14 Mounting body 14A Intervening member 14A-1 Holding part 14A-2 Contact part 14A-3 Pressed part Part 14B Mounting block 14B-1 Screw hole 14B-2 Pressing part 14C Screw body

Claims (1)

The central conductor is held in the outer conductor via an insulator, and the outer conductor is attached to the edge of the circuit board together with the mounting body in a posture in which the axis is parallel to the upper surface of the board of the circuit board on which the circuit surface is formed. In a coaxial electric connector in which a central conductor extending parallel to a circuit surface formed on the upper surface of the substrate contacts the circuit surface in the plate thickness direction of the circuit board.
The outer conductor extends from the body of the outer conductor in the radial direction of the body and is located parallel to the plate thickness surface at the edge of the circuit board. It has a support portion on which a substrate support surface located facing the upper surface of the substrate of the circuit board is formed.
The mounting body is a mounting block on which the screw body inserted into the screw body insertion hole formed in the flange portion of the outer conductor is screwed on the other plate surface side of the circuit board, and the mounting body and the other of the circuit board. It has a metal intervening member arranged between the surfaces and
The intervening member is located on the sandwiching portion having a surface for sandwiching the circuit board between the supporting portion of the external conductor and the surface opposite to the sandwiching portion in the plate thickness direction, and receives the pressing force from the mounting block. It has a pressing portion and a contact portion that comes into contact with the flange portion.
The mounting block has a pressing portion that presses the pressed portion.
At least one of the pressed portion and the pressing portion faces both the lower surface of the circuit board and the flange portion by tightening the screw body in the threaded body insertion hole of the flange portion and pulling the mounting block toward the flange portion. A coaxial electric connector characterized by forming a slope that produces a pressing force with a component.

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