JPH0715107Y2 - Coaxial connector between chassis and its case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is directed to each terminal of a printed circuit board mounted on a chassis inserted in a case and a core wire and an outside of a coaxial cable arranged outside the case. The present invention relates to a coaxial connector provided between a chassis and its case for electrically connecting a conductor and a conductor separately.

(Prior Art) Conventionally, an electronic device that houses a printed circuit board in which a super high frequency circuit is incorporated in a case is used by being connected to another electronic device or a power source via a coaxial cable. , A connector for supplying a signal to an external device is attached to the wall portion of the case of the device equipped with this printed board, for example, a female connector with pin terminals is attached, and the pin terminal of this female connector and the circuit terminal are connected by a coaxial cable. Connecting. Then, there is one in which the female side of the female connector with pin terminals is connected to the terminal of the coaxial cable from the external device to facilitate the connection between the terminal on the printed circuit board side and the terminal of the coaxial cable from the external device. An example of such a coaxial connector is shown in FIG. This figure shows a temporary radiator 1 placed at the focal point of a parabolic reflector (not shown) for satellite broadcasting reception.
FIG. 3 is a cross-sectional view showing a satellite broadcast receiving converter circuit 2 in which a primary radiator 1 is inserted in a cup-shaped case 3 having an opening on the right side of the figure. The satellite broadcast receiving converter circuit 2 is incorporated in a printed circuit board 4 attached to the lower surface of the primary radiator 1. The coaxial connector is a signal output terminal and a ground terminal (not shown) of this converter circuit 2.
And a coaxial cable (not shown) arranged outside the case 3, and is composed of a connector 5 and a coaxial cable 6. As shown in FIG. 8, the connector 5 includes a pin contact 7 and an outer conductor 8 that surrounds the pin contact 7 via an insulating layer (not shown). It is installed through. In the coaxial cable 6, the core wire 9 on one end side is connected to the pin contact 7 protruding inside the case 3,
10 are connected to the outer conductors 8 exposed inside the case 3 via solder, respectively. And this coaxial cable 6
The other end of the core wire 9 to the signal output terminal of the converter circuit 2,
The outer conductors 10 are respectively connected to the ground terminals of the converter circuit 2 via solder.

(Problems to be Solved by the Invention) However, in the conventional coaxial connector shown in FIG. 8, before inserting the primary radiator 1 and the converter circuit 2 into the case 3, the core wire 9 and the outer conductor wire 10 of the coaxial cable 6 are inserted. It is necessary to connect the signal output terminal and the ground terminal of the converter circuit 2 via solder, respectively, and then insert the converter circuit 2 and the like into the case 3. Therefore, as shown in the figure, a coaxial cable 6 having a length corresponding to about twice the depth of the case 3 is required. If the coaxial cable 6 is so long, the coaxial cable 6 bends in a U shape in a state where the converter circuit 2 and the like are inserted in the case 3, and due to this bending method, an ultra high frequency signal passing through the coaxial cable 6 is generated. This is one of the causes that it is difficult to keep the performance of the converter circuit 2 after being assembled in the case 3 constant because the electrical characteristics of the coaxial cable 6 change.

Further, as the size of the product is reduced with the improvement of the technology, it has become difficult to insert the coaxial cable 6 into the case 3 together with the primary radiator 1, and the terminals of the coaxial cable 6 and the converter. There is a problem that the work of connecting the circuit 2 and each terminal of the connector 5 by soldering becomes difficult.

The object of the present invention is to connect the terminals of the printed circuit board 4 housed in the case 3 to the core wire and the outer conductor of the coaxial cable arranged outside the case 3 and to mount the printed circuit board 4. Chassis 3
(EN) Provided is a coaxial connector between a chassis and a chassis, which simplifies the work of inserting into the chassis and prevents the electrical characteristics of these connecting parts from being changed by the assembly of the printed circuit board and the case.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a case formed in a container shape having an opening and a printed circuit board connected to a coaxial cable through a connector. A chassis that is inserted into and fixed to the case through an opening of the case, and a first body that penetrates a wall portion of the case inward and outward so as to project on an inner surface and has an outer base portion connected to a core wire of the coaxial cable.
A fixed side portion of the connector, which is composed of an outer conductor surrounding the metal piece and the first metal piece at a predetermined interval and protruding from the inner surface and connected to an outer conductor wire of the coaxial cable; The first metal piece and the outer conductor are inserted into the case so as to project at a position corresponding to the fixed side portion of the printed circuit board and separately connected to the printed circuit board side by inserting the chassis. A movable side of a connector having pin contacts provided so as to be pressed and connected to each other to be in a connected state and to be separated from each other by pulling out the chassis, and a second metal piece that surrounds the pin contacts at a predetermined interval. And a section.

(Operation) When connecting the movable side part that is connected to each terminal on the printed circuit board side and the fixed side part that is attached to the wall of the case, connect the chassis to which the printed circuit board is attached from the opening of the case. Insert and lock in place in the case. At this time, the pin contact and the second metal piece of the movable side portion are inserted to the positions of the first metal piece and the outer conductor of the fixed side portion, and are separately pressure-connected. The second metal piece on the movable side of the connector surrounds the pin contact at a predetermined interval, and the outer conductor on the fixed side part surrounds the first metal piece at a predetermined interval to shield the first contact. Therefore, the signal passing through the pin contact and the first metal piece is less likely to be adversely affected by electrical influence from the outside.

When the movable side portion and the fixed side portion of the connector are separated from the connected state, the chassis can be pulled out from the opening of the case.

(Embodiment) An embodiment of the present invention will be described with reference to a coaxial connector for connecting the terminal of the satellite broadcast receiving converter circuit 2 described in the conventional example and the coaxial cable arranged outside the case 3. This embodiment will be described with reference to FIGS. 1 to 7, but the same parts as those in FIG. 8 are denoted by the same reference numerals, and the description thereof will be omitted. In the figure, 11 is a fixed side portion and 12 is a movable side portion.

The fixed side portion 11 has a substantially cylindrical outer peripheral wall 13 as shown in the center of FIG. 6, and a male screw is engraved on the lower portion of the outer peripheral wall 13.
A collar 14 is provided in the center. Then, a positioning portion 15 formed by face-cutting is provided on a part of the upper outer surface. Also,
A through hole 16 into which the fixed side portion 11 is fitted is formed in the lower wall portion of the case 3 shown in FIG. 1 to which the fixed side portion 11 is attached, and the inner surface of the through hole 16 is shown in FIG. ) And (b), a protrusion 17 corresponding to the positioning portion 15 is provided. When attaching the fixed side portion 11 to the case 3, the upper portion of the fixed side portion 11 is fitted into the through hole 16 with the orientation of the positioning portion 15 aligned with the convex portion 17, and the nut 18 is engraved on the lower surface of the case 3. The collar 14 is screwed onto the provided male screw 19 and the collar 14 is tightened and fixed to the case 3.

Further, as shown in FIG. 6, the upper surface of the fixed side portion 11 is provided with a first metal piece 20 and an outer conductor 21 which project to the inner surface of the case 3.

The first metal piece 20 is formed by bending a flat plate into a U shape and expanding both ends to the outside. The first metal piece 20 and the outer conductor 21 are insulated by the insulating layer 22.

As shown in FIG. 6, the outer conductor 21 has a cutout portion in a part of the outer circumference.
It has a cylindrical shape provided with 23, and this notch 23 is the first metal piece 20.
The first metal piece 20 is surrounded by the insulating layer 22 so as to surround the first metal piece 20. The outer conductor 21 is
As shown in FIG. 3, it is connected to the outer peripheral wall 13 of the fixed side portion 11.

As shown in FIG. 1, the fixed side portion 11 is attached to the case 3 with the opening side of the first metal piece 20 and the notch 23 of the outer conductor 21 facing the opening side of the case 3 (left side in the figure). To be
Then, for example, a female connector connected to a coaxial cable (not shown) arranged outside the case 3 is connected to the lower end thereof, and the first metal piece 20 serves as a core wire of the coaxial cable.
The outer conductors 21 are connected to the outer conductors, respectively.

The movable side portion 12 is provided with a pin contact 24, a second metal piece 25 and a holding portion 26 as shown in the exploded perspective view of FIG.

The pin contact 24 has an insulator 27
Is a conductor covered with.

As shown in the figure, the second metal piece 25 is formed by bending a strip-shaped conductive thin plate in a U-shape, and bending the ends in a circular arc shape so that both ends face outward at right angles. ing. The distance between the two bent portions 28 is gradually narrowed toward the opening side of the U-shaped portion 29, and is gradually widened at the opening portion. It should be noted that small mounting plates 30 are provided at both ends and the U-shaped bent portion, and insertion holes 31 are formed in each mounting plate 30.

The holding portion 26 is a plate-shaped body formed of an insulating material,
This is for attaching the second metal piece 25 to the printed circuit board 4. At the center, a groove 32 that opens to the front right side is provided, and the groove 32 is sized to receive the second metal piece 25.
A ridge 33 is provided on the lower edge of the inner wall forming the groove 32, and the ridge 33 attaches the second metal piece 25 to the holding portion 26 to attach the second metal piece 25 to the printed circuit board 4 and the primary radiator 1. This is for holding the second metal piece 25 to facilitate the attachment when attaching. It should be noted that the holding portion 26 is provided with three insertion holes 34 at positions corresponding to the three insertion holes 31 of the second metal piece 25.

The procedure of assembling the movable side portion 12 and attaching it to the primary radiator 1 will be described with reference to FIGS. 4 and 5. First, the upper end of the pin contact 24 covered with the insulator 27 is placed on the lower surface 40 of the primary radiator 1 (corresponding to the chassis of claim (1)).
It is fitted and fixed in the small hole 35 formed in the. Next, a small hole 36 is formed in the printed circuit board 4 which constitutes the converter circuit 2.
The lower end of the pin contact 24 is inserted into the (ultra high frequency signal output section) and the printed circuit board 4 is brought into contact with the lower surface 40. As shown in the figure, the printed circuit board 4 is provided with three insertion holes 37 at positions corresponding to the insertion holes 31 of the second metal piece 25, and the lower surface 40 of the primary radiator 1 is printed. Three female screws 38 are engraved at positions corresponding to the three insertion holes 37 in a state where the substrate 4 is in contact with the lower surface 40 thereof. Then, the second metal piece 25 is assembled in the groove 32 of the holding portion 26, and in the assembled state, the second metal piece 25 is brought into contact with the lower surface of the printed circuit board 4, and the positions of the second metal piece 25, the holding portion 26, and the like are slightly moved. The insertion hole 31 and the like and the female screw 38 are aligned. In this state, the three bolts 39 are inserted through the three insertion holes 34 of the holding portion 26 and screwed into the female screw 38, and the movable side portion 12 and the printed circuit board 4 are fastened to the lower surface 40 of the primary radiator 1. To do. This state is shown in FIG.
This is shown in FIGS. FIG. 3 shows AA of FIG.
It is sectional drawing seen from the direction. The pin contact 24 is connected to the signal output terminal of the converter circuit 2 provided on the lower surface of the printed board 4 via solder, and the second metal piece
25 is connected to the ground terminal which is also wired on the lower surface of the printed circuit board 4.

In this way, the pin contact 24 and the second contact of the movable side portion 12 connected to the signal output terminal and the ground terminal of the printed circuit board 4
When the metal piece 25 is connected to the first metal piece 20 of the fixed side portion 11 attached to the case 3 and the outer conductor 21, the primary radiator 1 is placed in the case 3 inside the case 3 as shown in FIG. Insert into the position through the opening. Then, as shown in FIG. 2, the pin contact 24 of the movable side portion 12 and the second metal piece 25 are fixed to the fixed side portion 11.
When the primary radiator 1 is fastened with screws, for example, in a state where it is inserted to the positions of the first metal piece 20 and the outer-side conductor 21 of the above, the outer surface of the pin contact 24 becomes first as shown in FIG.
The inner surface of the curved portion of the metal piece 20 is pressed into contact with the inner surface of the curved portion of the second metal piece 25, and the inner surface of the outer conductor 21 is pressed into contact with the inner surface of the outer conductor 21 to establish a connection state.

The second metal piece 25 of the movable side portion 12 of the connector surrounds the pin contact 24 at a predetermined interval, and the outer conductor 21 of the fixed side portion 11 covers the first metal piece 20 and the insulating layer 22. The signal passing through the pin contact 24 and the first metal piece 20 is less likely to be adversely affected by electric power from the outside because it is surrounded and shielded through.

The pin contact 24 is soldered to the printed circuit board 4 while being fitted in the primary radiator 1 and is firmly fixed to the primary radiator 1, so that when the pin contact 24 comes into pressure contact with the first metal piece 20. , No connection failure will occur.

When the movable side portion 12 and the fixed side portion 11 of the connector are separated from the connection state of FIG. 2, the primary radiator 1 may be pulled out from the opening of the case 3, contrary to the connection state.

However, although the circuit incorporated in the printed circuit board 4 of this embodiment is the satellite broadcast receiving converter circuit 2 and the chassis is the primary radiator 1, the circuit incorporated in the printed circuit board 4 is an arbitrary circuit. The chassis may be any one to which the printed circuit board 4 can be attached.

(Effects of the Invention) Since the present invention is configured as described above, the coaxial cable 6 for connecting the terminal on the printed circuit board 4 side and the connector 5 as described in the conventional example is not necessary, and as a result, There is an effect that the performance of the converter circuit 2 after it is assembled to the case 3 can easily approach a predetermined standard. In the conventional example, the pin contact 7 and the outer conductor 8 of the connector 5 are connected to the core wire 9 of the coaxial cable 6, respectively.
, And the outer conductive wire 10 via solder, but this soldering work is not necessary and the chassis is inserted into a predetermined position in the case, so that the pin contact and the second metal on the movable side of the coaxial connector are inserted. First piece and fixed side
There is an effect that the metal piece and the outer conductor can be easily pressure-connected with one touch.

In addition, since the second metal piece on the movable side shields the pin contact and the outer conductor on the fixed side shields the first metal piece with an insulator, a signal passing through the pin contact and the first metal piece is external. The effect of being less likely to be adversely affected by electric power from

Further, since the movable side portion and the fixed side portion are directly connected without using the coaxial cable 6, the connector on the fixed side portion is connected via the coaxial cable without deteriorating the electrical characteristics of the high frequency signal (1 GHz). There is an effect that the output signal can be transmitted to the external electronic device.

[Brief description of drawings]

FIG. 1 is a longitudinal front view showing a state in which a primary radiator according to an embodiment in which the present invention is applied between a satellite broadcast receiving converter and its case is inserted into a case, and FIG. 2 is a primary radiator of the same embodiment. 3 is a vertical front view showing a state in which the
The figure is a longitudinal cross-sectional view of FIG. 2 as seen from the direction AA, FIG. 4 is an exploded perspective view of the movable side portion of the same embodiment, and FIG. 5 is an assembled perspective view of the movable side portion of the same embodiment. FIG. 6 is an exploded perspective view of a fixed side portion of the embodiment, and FIG. 7 (a) is a perspective view showing a through hole of a case to which the fixed side portion of the embodiment is attached.
FIG. 7 (b) is a view of the through hole as seen from below the case,
FIG. 8 is a vertical sectional view of a conventional satellite connector provided between a satellite broadcast receiving converter and its case. 1 …… Primary radiator (chassis), 3 …… case, 4 ……
Printed circuit board, 11 …… Fixed side, 12 …… Movable side, 20…
… First metal piece, 21 …… Outer conductor, 24 …… Pin contact, 25 …… Second metal piece.

Claims (1)

[Scope of utility model registration request] 1. A chassis formed in a container shape having an opening, a chassis provided with a printed circuit board connected to a coaxial cable via a connector, and fixed by being inserted into the case through the opening of the case. A first metal piece that penetrates the wall portion of the case inward and outward and projects on the inner surface and has an outer base portion connected to the core wire of the coaxial cable; and surrounding the first metal piece at a predetermined interval. A fixed side portion of the connector, which is formed of an outer conductor protruding from the inner surface and connected to the outer conductive wire of the coaxial cable, and coupled to the case, and the fixed side portion of the printed circuit board in a state of being inserted into the case. The protrusions are provided at corresponding positions and are separately connected to the printed circuit board side. When the chassis is inserted, the first metal piece and the outer conductor are separately pressed and connected to be in the connected state. A chassis comprising: a pin contact provided so as to be in a separated state by pulling out a wire; and a movable side portion of a connector having a second metal piece surrounding the pin contact at a predetermined interval. And a coaxial connector between its case.