JP7137275B2 - Mounting structure of coaxial electrical connector to circuit board and coaxial electrical connector - Google Patents

Description

The present invention relates to a structure for mounting a coaxial electrical connector to a circuit board and the coaxial electrical connector.

Japanese Unexamined Patent Application Publication No. 2002-200002 discloses a technique for attaching mounting components including a connector to a circuit board. Here, it can be understood that the mounting component also includes a connector, and the connector is not limited to its type, and can be applied to a coaxial electrical connector as well.

The mounting component disclosed in Patent Document 1 is provided with an insertion pin that is inserted into a through hole in which a plated layer is applied to the inner surface of the hole portion of the circuit board. The insertion pin is formed as a thin hollow cylindrical body, and has a slit extending to the lower end at one point in the circumferential direction. Two protruding annular flange portions (“stopper portion” and “large diameter portion” in Patent Document 1) are provided. A fixing pin is inserted into the hollow portion of the insertion pin from the lower side of the circuit board, and the fixing pin is provided with a projecting portion (large diameter portion) at the lower end of the shaft portion (insertion portion). ing. When the fixing pin is inserted until the projecting portion of the lower end contacts the lower end of the insertion pin, the upper end of the shaft portion (insertion portion) of the fixing pin reaches an intermediate position in the hollow portion of the insertion pin, The insertion pin is deformed to elastically expand its diameter at the slit portion. As a result, the expanded insertion pin is pressed against the inner diameter surface of the through hole of the circuit board, is electrically connected, and is fixed to the circuit board between the upper and lower flange portions of the insertion pin in the axial direction. .

JP 2004-349632

In Patent Document 1, insertion pins of mounted components are inserted into through-holes of the circuit board from above the circuit board, and then fixing pins are inserted into the hollow portions of the insertion pins from below the circuit board. It must be pushed into the hollow until it is in place.

Therefore, in order to fix a mounted component to a circuit board, two components, an insertion pin above the circuit board and a fixing pin below the circuit board, are separately arranged, and the fixing pin is inserted into the insertion pin from below and fixed. Two operations are required, and the operation is complicated and troublesome. Furthermore, since the circuit board blocks the view, it is extremely difficult to operate. If the circuit board has already been attached to the device before mounting the component on the circuit board, the above operation may be nearly impossible. Therefore, it is desirable that mounted components can be attached to only one side of the circuit board, and this is highly desired for coaxial electrical connectors.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for attaching a coaxial connector to a circuit board, and a coaxial connector, in which the coaxial electrical connector can be reliably attached to the circuit board by an operation on only one side of the circuit board. is the subject.

In the mounting structure of the coaxial electrical connector to the circuit board (hereinafter referred to as "coaxial connector") according to the present invention, the central conductor is held in the body of the outer conductor via an insulator, and the circuit board substrate having the circuit surface is formed. Attached to the top surface of the substrate is the outer conductor of a coaxial connector with the center conductor contacting the circuit surface in a direction perpendicular to the axis of the top surface.

In the mounting structure of the coaxial connector to the circuit board, in the present invention, the outer conductor has a mounting flange extending radially from the body of the outer conductor and positioned facing the upper surface of the circuit board, A mounting hole is formed in the mounting flange portion, and a mounting tool is disposed so as to pass through the mounting hole and a locking hole formed in the circuit board at a position corresponding to the mounting hole, and the mounting tool is attached to the outside. a mounting member provided with a mounting head located on the upper surface of the mounting flange of the conductor and a screw shaft extending axially with respect to the mounting head and passing through the mounting hole and the locking hole; and a screw shaft of the mounting member. The locking member has a locking part that can be locked to the lower part of the base plate, and the locking member is displaced by the operation of the mounting head. The circuit board is sandwiched between the mounting flange portion of the outer conductor and the locking portion of the locking member.

Here, "displacement" in the locking member refers to a phenomenon including at least one of the case where the position of the locking member is moved and the case where the locking member is partially deformed.

According to the present invention having such a configuration, when mounting the coaxial connector on the circuit board, the mounting flange portion of the external conductor is arranged on the upper surface of the circuit board, and then the mounting hole of the mounting flange and the circuit board are mounted. The fixture is arranged so as to pass through the locking hole, and then an operation such as rotating the mounting head of the fixture is performed. By operating the fixture, the locking member is displaced, and the circuit board is sandwiched between the locking portion of the locking member and the mounting flange portion of the external conductor. Thus, the mounting operation is extremely simple, since only one operation is required to operate the fixture on the top side of the board, which is one side of the circuit board.

In the present invention, the displacement of the locking member includes the case of movement and the case of deformation.

<Form in the case of displacement by movement>
When the displacement of the locking member is the movement, in the present invention, the locking member of the attachment includes a tubular portion formed with an internal thread that is screwed onto the threaded shaft portion of the attaching member, and the tubular portion. The mounting flange portion of the outer conductor forms a space for receiving the cylindrical portion of the locking member from below in the axial direction and communicates with the mounting hole. The circuit board has a receiving portion that allows the locking member to pass through the locking hole of the circuit board, and the screw shaft portion and the locking member that is screwed therewith are inclined with respect to the axis. By operating the mounting head of the mounting member and pulling up the screw shaft portion in the tilted posture to a vertical posture located on the above-mentioned axis, locking is performed. The claw portion is positioned on the lower surface of the edge portion of the locking hole of the circuit board and is configured to be pressed upward against the lower surface of the edge portion.

In such a configuration, after the locking member of the mounting fixture is positioned in an inclined position through the mounting hole of the mounting flange portion and the locking hole of the circuit board, the mounting member of the mounting fixture is attached to the mounting head. The screw shaft portion is loosely screwed into the locking member in a state in which the is projecting upward. After that, the screw is tightened by rotating the mounting head of the mounting member. As the screw tightening progresses, the locking member that is screwed into the screw shaft moves from the tilted posture to the vertical posture together with the screw shaft, is lifted up, and moves toward the lower surface of the circuit board. The mounting flange and the circuit board are sandwiched between the parts.

<Form when displacement due to deformation is included>
In the present invention, when the displacement of the locking member accompanies the elastic deformation and movement of the locking member, the locking member of the fixture is screwed into the threaded shaft portion of the mounting member as a form in which the displacement accompanies the movement after the elastic deformation. and a locking pawl projecting radially outward from a lower portion of the cylindrical portion. and has elasticity in the radial direction. The cylindrical portion is elastically contracted and deformed so that the locking claw portion can return to a free state after passing through the locking hole, and the mounting flange portion of the outer conductor has a receiving portion which defines a space for receiving the upper portion of the cylindrical portion of the locking member from below in the axial direction and communicates with the mounting hole, and the cylindrical portion penetrates the locking pawl portion into the locking hole. When the mounting head of the mounting member is operated to pull up the screw shaft portion that is screwed into the inner thread of the tubular portion, the locking pawl portion locks the circuit board. It is arranged to be positioned under the rim of the hole and to be pressed upwardly against the rim underside.

In this embodiment, the engaging member is lightly screwed onto the threaded shaft portion of the mounting member and temporarily supported, and the diameter of the engaging member is reduced at the position of the engaging claw portion to engage the mounting hole of the mounting flange portion with the circuit board. After the locking member passes through the mounting hole and the locking hole, it returns to the free state and the locking claw portion is positioned facing the lower edge of the locking portion of the circuit board. Then, the mounting head of the mounting member is rotated, and the locking member is pulled up by the screw shaft. The locking claw portion of the locking member that has been pulled up comes into contact with the lower surface of the edge portion, and the circuit board is sandwiched between the mounting flange portion and the locking claw portion.

Next, in the present invention, as a form in which the displacement of the locking member is elastic deformation without movement of the locking portion, the locking member of the attachment is formed with an internal thread that is screwed onto the threaded shaft portion of the mounting member. and a locking pawl projecting radially outward from the lower portion of the cylindrical portion. The cylindrical portion is formed with a slit extending from the intermediate position in the axial direction to the lower end position. The locking member is radially smaller than the locking hole of the circuit board when the cylindrical portion is in the free state, and has a diameter that decreases downward. In addition, the upper portion of the locking claw portion has a sloped outer shape portion, and the mounting flange portion of the outer conductor forms a space for receiving the upper portion of the tubular portion of the locking member from below in the axial direction and communicates with the mounting hole. When the cylindrical portion is in a free state, the screw shaft portion is moved into the cylindrical portion by operating the mounting head portion of the mounting member after the locking pawl portion is passed through the locking hole. By entering the inner thread of the portion, the locking claw portion is elastically deformed to expand its diameter, and the inclined outer diameter portion of the locking claw portion presses the lower end of the locking hole of the circuit board.

In such a configuration, the locking member has a diameter smaller than that of the mounting hole of the mounting flange and the locking hole of the circuit board at the position of the locking claw, so that the locking member passes through the mounting hole and the locking hole in a free state. After this penetrating arrangement, the mounting head of the mounting member is operated to allow the screw shaft to enter the inner thread of the cylindrical portion of the locking member, thereby elastically expanding and deforming the cylindrical portion. As a result, the inclined outer diameter portion of the locking claw portion at the lower portion of the cylindrical portion presses the lower end of the locking hole of the circuit board radially outward and upward, and the mounting flange portion and the locking claw portion hold the circuit board. pinch. Therefore, the locking member is firmly held by the circuit board, and the mounting flange portion of the external conductor is also firmly held by the circuit board.

The present invention also provides coaxial connectors having the various types of mounting structures described above, wherein the coaxial connector holds the center conductor in the body of the outer conductor via an insulator, and the circuit plane is formed. In a coaxial electrical connector in which the center conductor contacts the circuit surface of the substrate in a direction perpendicular to the axis of the substrate and the outer conductor is attached to the upper surface of the substrate, the outer conductor extends radially from the body of the outer conductor. A mounting flange portion extending and positioned facing the upper surface of the circuit board, a mounting hole being formed in the mounting flange portion, and an engaging hole formed in the circuit board at a position corresponding to the mounting hole and the mounting hole. A mounting fixture is disposed through the blind hole, and the mounting fixture extends axially with respect to the mounting head positioned on the upper surface of the mounting flange portion of the outer conductor and the mounting head, and engages the mounting hole and the mounting head. A mounting member having a threaded shaft extending through the hole, and a locking member screwed to and supported by the threaded shaft of the mounting member, the locking member being capable of being locked to the lower portion of the substrate. It has a stop portion, and is configured such that the locking member is displaced by the operation of the mounting head, and the circuit board is sandwiched between the mounting flange portion of the external conductor and the locking portion of the locking member.

As described above, according to the present invention, the fixture includes a mounting member and a locking member, and the mounting member comprises a mounting head located on the upper surface of the mounting flange portion of the outer conductor, and a mounting portion for mounting the mounting flange portion. A locking member having a screw shaft portion passing through the hole and the locking hole of the circuit board and supported by being screwed to the screw shaft portion of the mounting member can be locked to the lower portion of the board. We decided to have a department. Therefore, after placing the mounting flange portion of the external conductor on the upper surface of the circuit board, the mounting fixture is arranged so as to pass through the mounting hole of the mounting flange and the locking hole of the circuit board, and the mounting head of the mounting fixture is rotated. The locking member can be displaced and the circuit board can be clamped between the mounting flange portion of the external conductor and the locking portion of the locking member by simply performing an operation such as pressing the upper side of the circuit board. The coaxial connector can be attached to the circuit board very easily by a single action of operating the attachment head.

1 shows a first embodiment of the present invention, (A) is a vertical cross-sectional view showing various members in a separated state before mounting the coaxial connector to a circuit board, and (B) is a perspective view of that state as seen from above. . FIG. 2 is a vertical cross-sectional view showing the procedure for attaching the coaxial connector of FIG. (C) shows the state in which the operation of the mounting member has started, and (D) shows the state in which the operation of the mounting member has been completed. FIG. 10 is a vertical cross-sectional view showing the second embodiment of the present invention, in which the coaxial connector is attached to the circuit board; FIG. 2 shows the coaxial connector and the circuit board of FIG. 1, where (A) is a perspective view from above and (B) is a perspective view from below; FIG. 4A is a longitudinal sectional view showing a procedure for mounting the coaxial connector of FIG. 3 to a circuit board and an enlarged view of a locking member; FIG. (B) is a cross-sectional view of the state when the locking member is pushed into the locking hole, (C) is a state where the locking member is locked to the circuit board, and the coaxial connector is secured by the mounting member. Sectional view of the state before being attached to the circuit board, (D) is an enlarged perspective view of the locking member in (A) seen from below, (E) is an enlarged view of the locking member in (B) from above It is a perspective view.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

<First Embodiment>
1(A) and 1(B) are shown in a separated state, and the mounting procedure is shown in FIGS. 2(A) to 2(D). .

FIG. 1(A) is a longitudinal sectional view, and FIG. 1(B) is a perspective view seen from above.

1A and 1B, a coaxial connector 10 has an outer conductor 11, a central conductor 12, and an insulator 13, and is attached to a circuit board P by a fixture 20. As shown in FIG. A circuit portion (not shown) is formed on the substrate upper surface P1 of the circuit substrate P. As shown in FIG.

The outer conductor 11 of the coaxial connector 10 is made of a metal material, and as seen in FIGS. and a mounting flange portion 11B having an outer diameter of a cuboid extending radially outward (direction parallel to the upper surface P1 of the substrate) from the lower portion of the body portion 11A. The mounting flange portion 11B has one diameter direction of the body portion 11A as its longitudinal direction (see FIG. 1(B)). Here, as can be seen in FIG. 1B, the body portion 11A includes a portion protruding upward from the mounting flange portion 11B and a portion located within the thickness direction range of the mounting flange portion 11B. It is formed integrally with the mounting flange portion 11B as one member.

An external screw 11A-1 for connection with a mating coaxial connector (not shown) is formed on the upper outer peripheral surface of the body portion 11A of the external conductor 11, and the interior of the body portion 11A is hollow vertically penetrating. and a space for holding a center conductor 12, which will be described later, via an insulator 13. Above the space is a receiving portion 11A- for receiving a holding portion (not shown) for the center conductor of the mating coaxial connector. 2 is formed.

As shown in FIG. 1A, the mounting flange portion 11B of the outer conductor 11 has recessed spaces opened downward in portions located on both sides of the body portion 11A in the radial direction of the body portion 11A. In the upper wall of this receiving portion 11B-1, a mounting hole 11B-2 (see FIG. 1 In the example of (B), square holes are formed.

The center conductor 12 is made of a metal material, and has an upper cylindrical fitting portion 12A and a shaft portion 12B having a smaller diameter than the fitting portion 12A and extending downward to the same position as the lower surface of the outer conductor 11. is doing. A lower end surface of the shaft portion 12B forms a central conductor connecting portion 12B-1 that contacts a corresponding circuit portion of a circuit board (not shown).

The fitting portion 12A of the center conductor 12 forms an insertion hole 12A-1 into which the center conductor of the mating connector is fitted in the axial direction. The slit 12A-2 enables elastic deformation in the radial direction. The shaft portion 12B of the center conductor 12 is provided with a locking projection 12B-2 protruding in the radial direction on the outer peripheral surface at the intermediate position in the axial direction.

The insulator 13 has a cylindrical shape, has a stepped portion 13A on the outer peripheral surface at an axially intermediate position, and is interposed between the small-diameter portion 11A-3 formed on the body portion 11A of the outer conductor 11 and the central conductor 12. ing. The locking protrusion 12B-2 of the center conductor 12 bites into the inner peripheral surface of the insulator 13 to secure the position of the center conductor 12 in the axial direction, and the outer conductor 11 holds the center conductor 12 via the insulator 13. is doing.

The insulator 13 is pressed from below by a holding ring 14 made of a metal material that is press-fitted from below into a holding hole 11A-4 forming a hollow space in the lower portion of the body portion 11A of the outer conductor 11. there is Thus, the insulator 13 is positioned upward by the outer conductor 11 at its stepped portion 13A, and is positioned downward by the upper end face of the retaining ring 14, and is held in a fixed position in the vertical direction. be.

The retaining ring 14 is made of a metal material and is press-fitted into the retaining hole 11A-4 of the outer conductor 11, so that it is electrically connected to the outer conductor 11 and forms a part of the outer conductor 11. As shown in FIG. The retaining ring 14 has a length in the axial direction where the lower end of the retaining ring 14 is at the same position as the lower end of the central conductor 12 in the axial direction. It forms part 14A.

The central conductor connecting portion 12B-1 and the outer conductor connecting portion 14A, which are the lower end surfaces of the central conductor 12, are located at the same height in the axial direction, and are positioned above the lower end surface of the portion of the outer conductor 11 positioned around the central conductor connecting portion 12B-1. also protrudes slightly in the axial direction.

In this embodiment, the fixture 20 has a mounting member 21 that is axially mounted on the mounting flange portion 11B of the outer conductor 11 from above, and a locking member 22 that is mounted from below. Two mounting fixtures 20 are prepared so as to form a pair corresponding to the two mounting holes 11B-2 formed in the mounting flange portion 11B of the outer conductor 11. As shown in FIG.

The mounting member 21 is formed as a threaded body and has a screw shaft portion 21A having an external thread and a mounting head portion 21B positioned at the upper end thereof and having a larger diameter than the screw shaft portion 21A. The screw shaft portion 21A has a thread diameter and an axial length that are inserted and penetrated into a mounting hole 11B-2 formed in the mounting flange portion 11B of the outer conductor 11, and the mounting head portion 21B It has an outer diameter larger than the inner diameter of the mounting hole 11B-2 so as to engage with the upper surface of the mounting hole 11B-2.

The locking member 22 includes a leg portion 22A (see FIG. 1B) as a cylindrical portion extending in the axial direction and having a rectangular cross section in a direction perpendicular to the axis, and a lower portion of the leg portion 22A extending along the axis. It has an engaging claw portion 22B as an engaging portion that protrudes in one direction in a direction perpendicular to it. The leg portion 22A is formed with a locking screw portion 22C as an internal thread that penetrates vertically and into which the screw shaft portion 21A of the mounting member 21 is screwed. Thus, the locking member 22 forms a tubular body with a rectangular outer shape. As shown in FIGS. 1A and 1B, the pair of locking members 22 are positioned below the mounting member 21 in the direction in which the locking claws 22B face each other.

The circuit board P is formed with a pair of square locking holes P2. When the mounting flange portion 11B of the external conductor 11 is placed at a normal position with respect to the circuit board P, the locking holes P2 are positioned corresponding to the two mounting holes 11B-2 of the mounting flange portion 11B. ing. The locking hole P2 is a rectangular shape through which the locking member 22 including the locking claw portion 22B can pass through even when the locking member 22 of the fixture 20 is screwed onto the screw shaft portion 21A and inclined with respect to the axis. The positional relationship between the pair of locking holes P2 is such that the locking member 22 passes through the locking holes P2 and the axis of the locking threaded portion 22C of the locking member 22 is aligned with the mounting flange portion 11B. The locking claws 22B are positioned at the edges of the bottom surfaces P3 of the edge portions of the pair of locking holes P2, which are adjacent to each other, when they are aligned with the axes of the mounting holes 11B-2 of the pair of locking holes P2. (see FIG. 2(C)).

Next, how to attach the coaxial connector 10 and the fixture 20 of this embodiment to the circuit board P will be described with reference to FIGS. 2(A) to 2(D).

First, as shown in FIG. 2A, the threaded shaft portion 21A of the mounting member 21 is inserted through the mounting hole 11B-2 and the receiving portion 11B-1 in the mounting flange portion 11B of the outer conductor 11 of the coaxial connector 10, and the mounting flange portion The locking member 22 is loosely screwed to the distal end of the screw shaft portion 21A below the threaded shaft portion 21B with its locking screw portion 22C, and the locking member 22 is temporarily supported by the screw shaft portion 21A. At this time, the screw shaft portion 21A and the locking member 22 may be inclined with respect to the axis (see FIG. 1(A)) or may be vertically positioned on the axis (see FIG. 1(C)).

Next, the locking member 22, which is temporarily supported by the screw shaft portion 21A, is tilted with respect to the axis along with the screw shaft portion 21A, and penetrates through the locking hole P2 of the circuit board P so that the outer conductor 11 of the coaxial connector 10 is inserted. The mounting flange portion 11B is placed at a regular position on the substrate upper surface P1 (see FIG. 2(B)). At this time, the locking member 22 temporarily supported by the screw shaft portion 21A may remain in a tilted posture as shown in FIG. 2(B).

After that, the mounting operation of rotating the mounting head 21B around the axis is started with the mounting head 21B of the mounting member 21 of the mounting fixture 20 . As this mounting operation progresses, the threaded shaft portion 21A of the mounting member 21 enters the locking threaded portion 22C of the locking member 22, and when the mounting head portion 21B comes into contact with the upper surface of the mounting flange portion 11B, the locking member 22 will be in the vertical position, and the locking member 22 will be pulled up (see FIG. 2(C)).

When the locking member 22 is pulled up, it enters the receiving portion 11B-1 of the mounting flange portion 11B. to lock. Thus, when the screw shaft portion 21A and the locking screw portion 22C of the locking member 22 are sufficiently tightened by the mounting operation with the mounting head portion 21B, the mounting head portion 21B and the locking claw portion 22B form the mounting flange portion. 11B and the circuit board are firmly sandwiched (see FIG. 2(D)). In other words, the circuit board P is sandwiched between the mounting flange portion 11B and the locking claw portion 22B. In this state, the outer conductor 14A of the outer conductor 11 and the center conductor connection portion 12B-1 of the center conductor 12 are electrically connected to the corresponding circuit portion on the circuit board P around them with sufficient contact pressure.

Thus, according to this embodiment, after the mounting flange portion of the external conductor is arranged on the upper surface of the circuit board, the mounting fixture is arranged so as to pass through the mounting hole of the mounting flange portion and the locking hole of the circuit board. Only by rotating the mounting head of the tool, the locking member can be displaced and the circuit board can be clamped between the locking portion of the locking member and the mounting flange portion of the external conductor. In other words, the coaxial connector can be attached to the circuit board very easily by only one operation of operating the attachment head on one side of the circuit board, that is, on the upper surface side of the board.

<Second embodiment>
Next, a second embodiment of the present invention will be described based on FIGS. 3 to 5. FIG.

3 is a vertical cross-sectional view of the coaxial connector 10 attached to the circuit board P in this embodiment, FIG. 4(A) is a perspective view from above, and FIG. 4(B) is a view from below. Perspective views, FIGS. 5(A) to 5(E), show an enlarged view of the locking member in addition to the mounting procedure. In each figure, parts similar to those of the previous embodiment (first embodiment) in FIGS. 1 and 2 are given the same reference numerals as in FIGS. do.

The outer conductor 11 of the coaxial connector 10 is made of a metal material, and has a body portion 11A and a mounting flange portion 11B, as seen in FIG. 3, as in the case of the previous embodiment. An outer thread 11A-1 for connection with a mating coaxial connector is formed on the outer peripheral surface of the body portion 11A, and an insulator 13 extends from the upper portion to the vicinity of the lower portion to accommodate and hold the insulator 13 inside. A receiving portion 11A-2 for receiving a holding portion (not shown) of the center conductor of the mating coaxial connector is formed in the upper portion of the space.

A receiving portion 11B-1 and a mounting hole 11B-2 are formed in the mounting flange portion 11B.

The central conductor 12 has substantially the same shape as in the previous embodiment.

In this embodiment, the insulator 15 is formed as two inner and outer cylinders located on the outer conductor 11 side and the central conductor 12 side, and has an outer insulator 15A and an inner insulator 15B.

The outer insulator 15A has an outer peripheral surface 15A-1 with a substantially uniform outer diameter along the axial direction, and is press-fitted into the body portion 11A of the outer conductor 11 having a corresponding peripheral surface. The inner peripheral surface 15A-2 of the outer insulator 15A is divided into three sections in the axial direction, namely upper section 15A-2A, intermediate section 15A-2B, and lower section 15A-2C. It has a small diameter. An inner insulator 15B for holding the center conductor 12 is press-fitted into the inner peripheral surface 15A-2 of the outer insulator 15A. The inner insulator 15B is a stepped cylindrical body having an upper portion 15B-1 with a small diameter and a lower portion 15B-2 with a large diameter. 2B, the lower portion 15B-2 of the inner insulator 15B is press fit into the lower portion 15A-2C of the outer insulator 15A. A holding hole 15C for the central conductor 12 is formed in the inner insulator 15B at the axial position, and the shaft portion 12B of the central conductor 12 is press-fitted into the inner insulator 15B and engaged with the inner surface of the holding hole 15C by the locking projection 12B-2. is stopped. The center conductor 12B may be formed integrally with the inner insulator 15B without being press-fitted, and the inner insulator 15B may also be formed integrally with the outer insulator 15A without being press-fitted.

The inner space of the upper portion 15A-2A of the outer insulator 15A forms a receiving portion 15A-2D for receiving the retaining portion of the center conductor of the mating coaxial connector.

The mounting fixture 30 in this embodiment is similar to that in the previous embodiment in that it has a mounting member 31 and a locking member 32, but the mounting member 31 is the same as in the previous embodiment. The mounting member 31 and the locking member 22 of the previous embodiment have different forms. Two fixtures 30 are prepared so as to form a pair.

As can be seen in FIG. 3, the mounting member 31 includes a threaded shaft portion 31A having an external thread formed on the outer peripheral surface of the cylinder over the entire range in the axial direction, and an operation groove 31B-1 into which an operation tool is inserted in the upper end surface of the screw shaft portion 31A. is formed on the mounting head 31B. As can be seen in FIG. 5, the length of the mounting member 31 in the axial direction is the same when the mounting member 31 is inserted into the mounting hole 11B-2 formed in the upper wall of the mounting flange portion 11B and the receiving portion 11B-1. , is sufficient to project both upwards and downwards from the top wall.

As can be seen in FIG. 5(D), the locking member 32 extends in the axial direction and has a hollow cylindrical cylindrical portion 32A and a radial direction perpendicular to the axis at the lower portion of the cylindrical portion 32A. It has a locking claw portion 32B as a locking portion that protrudes outward over the entire circumference. The tubular portion 32A is formed with a locking screw portion 32C as an internal thread into which the screw shaft portion 31A of the mounting member 31 is screwed into the inner surface of a vertically penetrating hollow hole (see FIG. 3).

The locking member 32 has axial slits 32D formed at a plurality of positions in the circumferential direction in a range from an intermediate position of the tubular portion 32A to the lower end of the locking claw portion 32B in the axial direction. A leg portion 32E divided into a plurality of pieces is provided. The leg portion 32E has elasticity so that it can be bent in the radial direction.

Circular locking holes P2 are formed in the circuit board P at positions corresponding to the pair of mounting holes 11B-2 formed in the mounting flange portion 11B of the external conductor 11, as shown in FIG. The hole diameter of this locking hole P2 is substantially equal to the outer diameter of the cylindrical portion 32A of the locking member 32. As shown in FIG. Therefore, in the free state, the locking member 32 has an outer diameter larger than that of the locking hole P2 at the position of the locking claw portion 32B in the axial direction by the amount of radially outward projection of the locking claw portion 32B. It will be. The edge lower surface P3 of the circuit board P at the periphery of the locking hole P2 has a function of locking to the locking claw portion 32B.

The locking member 32 is attached to the circuit board P by being inserted into the locking hole P2 of the circuit board P so as to be pushed from above. In the process of inserting the locking member 32, the locking pawl portion 32B is radially pressed by the inner peripheral surface of the locking hole P2, so that the leg portion 32E is elastically deformed inward in the circumferential direction and reduced in diameter. Further pushing into the locking hole P2 becomes possible (see FIGS. 5(B) and 5(E)). As the locking member 32 is further pushed into the locking hole P2, the locking claw portion 32B of the locking member 32 protrudes downward from the locking hole P2. The leg portion 32E is released from elastic deformation, expands in diameter, and returns to a free state, and the locking claw portion 32B comes to face the edge portion lower surface P3 of the circuit board P (FIG. 5(C)). However, a slight gap may remain between the upper surface of the locking claw portion 32B and the edge portion lower surface P3.

Therefore, next, after inserting the mounting member 31 into the locking member 32, a tool is inserted into the operation groove 31B-1 of the mounting head 21, and by rotating it, the threaded shaft portion 31A of the locking member 32 is rotated. is screwed into the locking screw portion 32C of the locking member 32. As shown in FIG. When the mounting member 31 is further rotated to advance the screwing into the locking screw portion 32C, the locking member 32 is relatively pulled up, and the locking claw portion 32B strongly contacts the edge lower surface P3. . Thus, as seen in FIG. 3, the circuit board P is sandwiched between the mounting flange portion 11B of the coaxial connector 10 and the engaging claw portion 32B (see also FIGS. 4A and 4B). . In this state, the outer conductor connecting portion 14A of the outer conductor 11 and the central conductor connecting portion 12B-1 of the central conductor 12 of the coaxial connector 10 are connected to the corresponding circuit portions of the circuit board P with sufficient contact pressure.

As described above, the present embodiment is not limited to pulling up the locking member by rotating the mounting member so that the upper surface of the locking claw strongly contacts the lower surface of the edge portion of the circuit board. By elastically expanding the diameter of the locking member and pressing the locking claw portion against the edge on the lower surface side of the edge of the circuit board, the locking claw portion and the external conductor are attached to the circuit board. It can also be clamped between the flange portions.

In such a modified example, the locking member of the fixture includes a cylindrical portion formed with an internal thread that is screwed onto the threaded shaft portion of the mounting member, and a cylindrical portion protruding radially outward from a lower portion of the cylindrical portion. It can be set as the structure which has a locking claw part. In this modified example, the tubular portion is formed with a slit extending from the intermediate position in the axial direction to the lower end position, and has elasticity in the radial direction. The locking member is formed so that when the cylindrical portion is in a free state, it is radially smaller than the locking hole of the circuit board and has a smaller diameter downward, and the upper portion of the locking claw portion has a sloped outer shape. has a part. The mounting flange portion of the outer conductor has a receiving portion that forms a space for receiving the upper portion of the cylindrical portion of the locking member from below in the axial direction and communicates with the mounting hole. According to this modification, when the cylindrical portion is in the free state, after the locking pawl portion is passed through the locking hole, the mounting head portion of the mounting member is operated to move the screw shaft portion to the cylindrical portion. , the diameter of the locking claw portion is elastically expanded, and the inclined outer diameter portion of the locking claw portion moves the lower end (peripheral edge) of the locking hole of the circuit board radially outward and upward. pressure.

Thus, according to this embodiment, after the mounting flange portion of the external conductor is arranged on the upper surface of the circuit board, the mounting fixture is arranged so as to pass through the mounting hole of the mounting flange portion and the locking hole of the circuit board. Only by rotating the mounting head of the tool, the locking member can be deformed and the circuit board can be sandwiched between the inclined outer diameter portion of the locking portion of the locking member and the mounting flange portion of the external conductor. The coaxial connector can be attached to the circuit board very easily by a single operation of manipulating the mounting head on one side of the circuit board, i.e., on the top side of the board.

10 Coaxial Connector 11 Outer Conductor 11A Body 11B Mounting Flange 11B-1 Receiving Portion 11B-2 Mounting Hole 12 Center Conductor 13 Insulator 15 Insulator 20 Mounting Tool 21 Mounting Member 21A Screw Shaft 21B Mounting Head 22 Locking Member 22A Cylindrical portion 22B Locking claw portion (locking portion)
22C inner screw 31 mounting member 31A screw shaft 31B mounting head 32 locking member 32B locking claw (locking portion)
32D Slit P Circuit board P1 Top surface of board P2 Locking hole P3 Bottom surface of edge (lower part of board)

Claims (5)

The center conductor is held in the body of the outer conductor via an insulator, and the center conductor is in contact with the upper surface of the circuit board on which the circuit surface is formed, in a direction perpendicular to the axis line, and on the upper surface of the substrate. In the mounting structure of the coaxial electrical connector to the circuit board to which the outer conductor is attached,
The external conductor has a mounting flange portion extending radially from the body portion of the external conductor and facing the upper surface of the circuit board, the mounting flange portion having a mounting hole formed therein,
a fixture is disposed through the mounting hole and a locking hole formed in the circuit board at a position corresponding to the mounting hole,
The mounting fixture includes a mounting head positioned on the upper surface of the mounting flange of the outer conductor, and a screw shaft extending axially with respect to the mounting head and passing through the mounting hole and the locking hole from above. and a locking member that is supported by being screwed to the threaded shaft portion of the mounting member and is disposed through the locking hole from above ,
The locking member has a locking portion that can be locked to the bottom of the substrate,
A coaxial electrical connector to a circuit board, characterized in that the locking member is displaced by the operation of the mounting head, and the circuit board is sandwiched between the mounting flange portion of the outer conductor and the locking portion of the locking member. mounting structure. The locking member of the fitting has a cylindrical portion formed with an internal thread that is screwed onto the threaded shaft of the mounting member, and a locking pawl projecting radially outward from the lower portion of the cylindrical portion. death,
the mounting flange portion of the outer conductor has a receiving portion which defines a space for receiving the cylindrical portion of the locking member from below in the axial direction and communicates with the mounting hole;
The circuit board allows the locking member to pass through the locking hole of the circuit board, and allows the screw shaft portion and the locking member to be screwed together to assume an inclined posture with respect to the axis. formed in shape and size,
By operating the mounting head of the mounting member to raise the inclined screw shaft to a vertical position on the above-mentioned axis, the locking pawl contacts the lower surface of the edge of the locking hole of the circuit board. 2. A structure for mounting a coaxial electrical connector to a circuit board as claimed in claim 1, wherein the coaxial electrical connector is positioned and pressed upwardly against the lower surface of said rim. The locking member of the fitting has a cylindrical portion formed with an internal thread that is screwed onto the threaded shaft of the mounting member, and a locking pawl projecting radially outward from the lower portion of the cylindrical portion. death,
the cylindrical portion has a slit extending from the intermediate position in the axial direction to the lower end position, and has elasticity in the radial direction;
When the cylindrical portion is in a free state, the locking member is formed radially larger than the locking hole of the circuit board at the position of the locking pawl portion, and the cylindrical portion elastically shrinks in diameter, thereby After the locking pawl penetrates through the locking hole, it can return to a free state,
The mounting flange portion of the outer conductor has a receiving portion which defines a space for receiving the upper portion of the cylindrical portion of the locking member from below in the axial direction and communicates with the mounting hole,
A screw shaft that is operated by the mounting head of the mounting member and screwed into the inner thread of the cylindrical portion when the cylindrical portion returns to the free state after the locking pawl portion is passed through the locking hole. 2. The circuit of the coaxial electrical connector according to claim 1, wherein the locking pawl is positioned on the lower surface of the edge portion of the locking hole of the circuit board by pulling up the portion, and is pressed upward against the lower surface of the edge portion. Mounting structure to the board. The locking member of the fitting has a cylindrical portion formed with an internal thread that is screwed onto the threaded shaft of the mounting member, and a locking pawl projecting radially outward from the lower portion of the cylindrical portion. death,
the cylindrical portion has a slit extending from the intermediate position in the axial direction to the lower end position, and has elasticity in the radial direction;
The locking member is formed so that when the cylindrical portion is in a free state, it is radially smaller than the locking hole of the circuit board and has a smaller diameter downward, and the upper portion of the locking claw portion has a sloped outer shape. has a part
The mounting flange portion of the outer conductor has a receiving portion which defines a space for receiving the upper portion of the cylindrical portion of the locking member from below in the axial direction and communicates with the mounting hole,
After the locking pawl portion is passed through the locking hole when the cylindrical portion is in the free state, the mounting head portion of the mounting member is operated to allow the screw shaft portion to enter the inner thread of the cylindrical portion. 2. The coaxial electrical connector to the circuit board according to claim 1, wherein the engaging claw portion is elastically expanded in diameter, and the inclined outer diameter portion of the engaging claw portion presses the lower end of the engaging hole of the circuit board. mounting structure. The center conductor is held in the body of the outer conductor via an insulator, and the center conductor is in contact with the upper surface of the circuit board on which the circuit surface is formed, in a direction perpendicular to the axis line, and on the upper surface of the substrate. In a coaxial electrical connector to which the outer conductor is attached,
The external conductor has a mounting flange portion extending radially from the body portion of the external conductor and facing the upper surface of the circuit board, the mounting flange portion having a mounting hole formed therein,
a fixture is disposed through the mounting hole and a locking hole formed in the circuit board at a position corresponding to the mounting hole,
The mounting fixture includes a mounting head positioned on the upper surface of the mounting flange of the outer conductor, and a screw shaft extending axially with respect to the mounting head and passing through the mounting hole and the locking hole from above. and a locking member that is supported by being screwed to the threaded shaft portion of the mounting member and is disposed through the locking hole from above ,
The locking member has a locking portion that can be locked to the bottom of the substrate,
A coaxial electrical connector, wherein the locking member is displaced by operation of the mounting head, and the circuit board is sandwiched between the mounting flange portion of the outer conductor and the locking portion of the locking member.

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