JPH0562744A - Coaxial connecting device between boards - Google Patents

Abstract

PURPOSE:To provide a coaxial connecting device between boards for connecting two circuit boards which is simple in structure and handling and can be miniaturized. CONSTITUTION:A dielectric section 2 is provided in a cylindrical outer conductor section 1 extended vertically, and the outer conductor section 1 has a leg-like connecting terminal section 11 extended from its lower section. A central conductor section 3 connected to a mating central conductor is held in the dielectric section 2, and the central conductor section 3 has a leg-like connecting terminal section 31 protruded downward from the dielectric section 2. The outer conductor section 1 and the central conductor section 3 are extended upward respectively, and springy upper contact sections 15, 34 extended upward respectively and capable of being elastically deformed vertically are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of coaxial connection devices between boards, and more particularly to a coaxial connection device for connecting the circuits of two circuit boards facing each other.

[0002]

2. Description of the Related Art Conventionally, as a coaxial connecting device for connecting circuits of two circuit boards facing each other, a pair of coaxial connecting devices for connecting a center conductor and an outer conductor to each other by fitting are used. It had been.

Both the center conductor and the outer conductor of the pair of coaxial connecting devices have leg-shaped connecting terminal portions extending on the side opposite to the fitting side, and both coaxial connecting devices have such connecting terminals. The parts are attached to the corresponding circuit boards and connected to the circuit parts by soldering or the like. Thus, in use, the circuits of both circuit boards are joined by fitting the coaxial connection devices mounted on the two opposed circuit boards together.

[0004]

However, the conventional coupling method using the above-mentioned pair of coaxial connection devices has the following problems.

First, there is a problem caused by the mounting accuracy of the coaxial connection device on the circuit board. For each of the pair of coaxial connection devices, if sufficient accuracy cannot be secured for the mounting position with respect to the circuit board and the orthogonality of the axis with respect to the mounting surface,
It becomes difficult to fit them together, and if they are forced, they may be damaged. In particular, when it is desired to couple the coaxial connection devices at a plurality of locations on the circuit board, even if the pair of coaxial connection devices at a single location can be ensured in accuracy and smoothly fitted, It is difficult to secure the same accuracy in other places.

Next, in use, there is a problem regarding the degree of coupling between the pair of coaxial connecting devices. That is, a predetermined impedance characteristic can be obtained by fitting the pair of coaxial connection devices by a predetermined depth, but the fitting depth is determined by manual adjustment, and thus variations occur.
Therefore, the impedance characteristic also varies, and a constant high frequency characteristic cannot be obtained.

Further, since the pair of coaxial connection devices are used, the minimum required distance between the two circuit boards becomes large, and therefore the device to which the circuit boards can be mounted cannot be downsized accordingly. There is also.

The present invention fundamentally solves the problem of the conventional coaxial connecting device between the boards, does not need to consider the mounting accuracy, and can ensure a certain performance in use.
It is an object of the present invention to provide a coaxial connection device that can be downsized and can be manufactured at a low cost with a simple structure.

[0009]

According to the present invention, the above object is to provide a dielectric portion in a vertically extending cylindrical outer conductor portion, and the outer conductor portion has a leg-shaped connection extending from a lower portion thereof. A central conductor portion that includes a terminal portion and is connected to the counterpart central conductor is held in the dielectric portion, and the central conductor portion has a leg-shaped connection terminal portion that projects downward from the dielectric portion. In this case, the outer conductor portion and the central conductor portion are each provided with an upper contact portion that extends upward and is elastically deformable in the vertical direction and has a spring property.

[0010]

The coaxial connecting device between the substrates according to the present invention described above is
It is used as follows.

First, after inserting the leg-shaped connection terminal portions of the central conductor portion and the outer conductor portion of the coaxial connection device into the mounting holes of one circuit board, these are connected to the circuit of the circuit board by soldering. Excuse me.

Next, the other circuit board, which is the other party, is attached to the one circuit board at a predetermined position. In that case, the accuracy of the relative position and the distance of the two circuit boards is sufficient even if it is lower than that in the case of coupling by the conventional two coaxial connection devices. When the other circuit board is attached, the upper contact portions of the coaxial connecting device on the one circuit board are perpendicular to the circuit surface with respect to the circuit portion formed at the predetermined position of the other circuit board. Then, they come into elastic contact with each other, so that the circuits of the two circuit boards are brought into contact with each other.

[0013]

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

FIG. 1 is a front view of a coaxial connection device between boards according to this embodiment, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a longitudinal sectional view showing a positional relationship with a circuit board. ..

In the figure, reference numeral 1 is an outer conductor shell which forms a vertically extending cylindrical outer conductor portion. As is clear from FIG. 3, the outer conductor shell of this embodiment has a substantially square cross section. Of course, the present invention is not limited to that shape, and may be another shape including a conventional cylindrical shape.

The outer conductor shell 1 is open in the vertical direction, and has leg-shaped connecting terminal portions 11, 11 extending downward at two locations so as to face each other on the diametrical line.

At the lower end of the body of the outer conductor shell 1,
The notch portion 1 opened downward at the position of another diameter line orthogonal to the diameter line connecting the connection terminal portions 11, 11.
2, 12 are formed. Further, in the body portion of the outer conductor shell 1, windows 13 and 13 are formed above the connection terminal portions 11 and 11.

A dielectric portion 2 is press-fitted into the cylindrical outer conductor shell 1 from below. The dielectric portion 2 is provided at its lower end with the cutout portions 12, 12 of the outer conductor shell 1.
21 and 21 that come into contact with the blade and are restricted in position in the press-fitting direction
have. In addition, the dielectric part 2 has windows 13 and 13 of the outer conductor shell 1 in order to prevent the dielectric part 2 from coming off after press fitting.
It also has protrusions 22, 22 that are locked to.

A holding hole 23 is formed in the dielectric portion 2 so as to vertically penetrate therethrough, and a strip-shaped central conductor portion 3 is inserted from above and held in the holding hole 23. The central conductor portion 3 has a connecting terminal portion 31 which is a portion protruding downward through the holding hole 23. A locking projection 32 is provided at the insertion portion of the central conductor portion 3 into the holding hole 23, and the inserted center is engaged with the corresponding locking recess of the holding hole 23. The conductor portion 3 is held at a predetermined position and is prevented from coming off. The central conductor portion 3 has a protruding portion upward from the holding hole 23 and is bent at a root portion thereof to form a dogleg shape as a whole, and has a spring property so as to be elastically deformed by an external force from above. It has a contact piece 33 with. The tip of the contact piece 33 is curved with a slight roundness to form an upper contact portion 34.

Two parallel ridges 24, 24 are formed on the upper portion of the dielectric portion 2 so as to project upward, and an intermediate portion of the contact piece 33 of the central conductor 3 is formed by the parallel ridges 24, 2.
It is arranged to be accommodated in the groove between the four.

Further, the above-mentioned outer conductor shell 1 is provided with "V" shaped contact pieces 14, 14 extending from the upper end of the body portion thereof in substantially the same direction as the contact piece 33 of the central conductor portion 3. , Rounded upper contact portions 15 and 15 are formed at their tips. The contact pieces 14, 14 of the outer conductor shell 1 have parallel ridge portions 24, 24 of the dielectric portion 2 at their intermediate portions.
In the stepped space on both outer sides of the stepped space, as in the case of the contact piece 33 of the central conductor 3 located in the groove, the contact parts 15, 15 receive an external force from above. Is elastically deformable.

The coaxial connecting device between the substrates according to the present embodiment having the above structure is used in the following manner.

First, in FIG. 4, the connection terminal portion 31 of the central conductor portion 3 and the connection terminal portion 11 of the outer conductor shell 1 are
One of the circuit boards P1 is inserted into the corresponding mounting hole, soldered to a predetermined circuit, and held.

Next, the other circuit board P2, which is the other party, is attached to the one circuit board P1 at a predetermined position by an attachment member (not shown). The other circuit board P2
Is provided with a circuit portion P2A having an area that sufficiently covers the upper contact portions 34, 15, 15 at positions corresponding to the upper contact portions 34, 15, 15 of the coaxial connection device. When both circuit boards P1 and P2 are fixed in position by a mounting member with a distance H, the outer conductor portion 1
And the central conductor part 3 are respectively the upper contact parts 15, 15 and 3
4, the contact piece 14 receives the contact pressure from the circuit board P2,
14 and 33 are elastically deformed and electrically connected to a predetermined circuit.

The present invention is not limited to the illustrated form, but can be variously modified. For example, the number of contact pieces, the extending direction, the position of the contact portion, and the like can be changed as appropriate. Further, the contact portion may be provided on another elastically deformable member instead of being provided on the contact piece.

[0026]

As described above, the present invention has the following effects. Since the contact portion between the central conductor portion and the outer conductor portion merely makes elastic contact with the circuit portion of the circuit board, the relative position and distance of the two circuit boards do not require accuracy.
Therefore, processing and assembling are extremely simple and the cost is reduced. Moreover, the performance is stable. Since the coaxial connecting device does not require the counterpart coaxial connecting device, the height dimension can be reduced, which contributes to the downsizing of the device and also the cost reduction in this respect. Moreover, since the structure is extremely simple, it can be manufactured by press working or the like, and the coaxial connection device itself is inexpensive.

[Brief description of drawings]

FIG. 1 is a front view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of that of FIG.

FIG. 3 is a plan view of that of FIG.

FIG. 4 is a vertical cross-sectional view of that of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 outer conductor part (outer conductor shell) 11 connection terminal part 14 contact piece 15 upper contact part 2 dielectric part 3 center conductor part 31 connection terminal part 33 contact piece 34 upper contact part

Claims (2)

[Claims] 1. A central conductor having a dielectric part in a vertically extending cylindrical outer conductor part, the outer conductor part having leg-shaped connection terminal parts extending from the lower part thereof, and connecting to a counterpart center conductor. Part is held in the dielectric part, and the central conductor part has leg-shaped connecting terminal parts projecting downward from the dielectric part. A coaxial connection device between substrates, which is provided with an upper contact portion that has a spring property and that extends to and is elastically deformable in the vertical direction. 2. The coaxial connecting device between substrates according to claim 1, wherein the upper contact portion is formed on a contact piece extending obliquely upward.