JPH0112383Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a coaxial cable relay device that can connect and hold a large number of signal pins from circuits to be connected to coaxial cables while electrically isolating them from each other. be.

<Prior art> A circuit board to be connected is assembled with a large number of signal pins and ground pins, a coaxial cable is connected to a predetermined one of these signal pins, and the connected coaxial cable is There has been a need in the past for a coaxial cable relay that can hold coaxial cables separated from each other while their outer conductors are grounded.

For example, a circuit formed on a board performs predetermined signal processing on a plurality of input signals applied to each terminal of a circuit formed on a board, and the processed signals are sent to the board. In some cases, it is necessary to transmit signals via coaxial cable at high transmission speed and with reduced crosstalk between signals.

In such a case, it is necessary to connect coaxial cables to each of the plurality of signal pins, and to completely ground the outer conductors of these coaxial cables using ground pins disposed so as to surround the signal pins. Conventionally proposed relay devices of this type have complicated and large-scale structures that make them difficult to use, while those with relatively simple structures have incomplete grounding of the outer conductor of the coaxial cable. In addition, the attached coaxial cable is not stably held and tends to fall out. In this way, this type of relay device is installed with the outer conductor completely grounded, and a number of coaxial cables connected to the signal pins of the connected circuit are stably placed in parallel to each other. It is desirable that the mounting structure is such that it can be easily attached to the board and that the structure is not large-scale as a whole. In this case, the board does not necessarily have to have a circuit for processing signals; for example, it simply holds the signal pins connected to the cables and mediates the connection to external LSIs, etc. It may be a substrate for.

<Summary of the invention> This invention satisfies the conventional requirements for this type of device, provides a coaxial cable relay that allows completely isolated transmission of each signal, and can be easily assembled and used on a board. It is something.

In this idea, a plurality of connection holes into which coaxial jumpers of coaxial cables are inserted are formed in a matrix in the ground plate, and these connection holes are surrounded by four connection holes each at equal angular intervals around the center. Pin insertion holes are formed in a matrix with pitches having the same spacing, and pins are inserted and planted into these pin insertion holes.

A cylindrical ground contact or a cylindrical dummy contact is inserted from one plate side of the ground plate according to the contact arrangement conditions of the circuit to be connected to the pins planted in these pin insertion holes. combined device. On the other plate surface side of the ground plate, a display plate is fixedly disposed, in which a coaxial jumper mounting hole is formed in a position continuous with the coaxial jumper connection hole. This display board has an indication of the connection position of the coaxial jumper with respect to each mounting hole.

A guide plate for guiding pins from a circuit to be connected to the ground plate is attached to the opposite side of the display plate from the fixed side. This guide plate is formed with a signal pin insertion hole and a pin insertion hole for guiding a pin from a circuit to be connected, with their axis aligned with the connection hole and pin insertion hole of the ground plate, respectively. The ground contact, which is fitted onto the pin from one plate side of the ground plate, has a cut groove that divides the ground contact into a plurality of parts in the axial direction from the guide plate side. A protrusion that elastically contacts the outer circumferential surface of the coaxial jumper of the coaxial cable inserted through the mounting hole and the connection hole is formed on the circumferential surface of the position, and this protrusion is made elastic by the outer circumferential surface of the coaxial jumper. The ground contact is biased to the corresponding pin.

<Example> Hereinafter, the coaxial cable relay device of this invention will be described in detail based on an example using the drawings.

Connecting holes into which the coaxial jumpers of multiple coaxial cables are inserted are formed in a matrix in the ground plate, and surrounding these connecting holes, four holes are arranged at equal angular intervals from the center, and the holes are arranged at the same pitch as a whole. Pin insertion holes are formed in a matrix, and pins are planted in these pin insertion holes.

FIG. 1 is a diagram showing the shape of the ground plate 11 and the pins 12 installed therein. The rectangular ground plate 11 made of an insulating material has connection holes 13-11 and 13- for the coaxial jumper of the coaxial cable.
12,...13-mn are formed in a matrix shape passing through the plate surface. The insertion holes 14-1 for the pins 12 are arranged in a matrix with four pins arranged at equal angular intervals with the same pitch as a whole with respect to the center of these connection holes.
1, 14-12, . . . 14 mn are formed passing through the plate surface.

In the embodiment shown in FIG. 1, the connection hole 13-1
The inner diameter of 1-13-mn is 2.2 mm, insertion hole 14-11
The inner diameter of ~14-mn is formed to 0.6 mm, and the insertion hole is provided with a counterbore on one side of the plate surface of the ground plate 11. Insertion holes 14-11 to 14-
Pins 12 made of a conductive material are inserted into mn from one side of the plate surface of the ground plate 11, respectively.

A cylindrical ground contact and a dummy contact are respectively fitted to the pin installed in the pin insertion hole from one plate side of the ground plate according to the contact arrangement conditions of the circuit to be connected. It will be installed.

That is, as shown in FIG. 5, a cylindrical ground contact 15 and a dummy contact 16 made of a conductive material are respectively fitted and attached to predetermined pins. Conditions for attaching the ground contact 15 and dummy contact 16 to the pins are performed in accordance with the contact arrangement conditions of the circuit to be connected.

FIG. 4 shows an example of this, in which ground contacts 15 are fitted to pin positions shaded in black, and dummy contacts 16 are fitted to pin positions that are not shaded. Further, as will be described later, a ground contact 15 is fitted into the pin position double-drawn in FIG. 4, and a dummy post is attached to this. The ground contact 15 is made of a conductive material, and the dummy contact 16 is made of an insulating material such as synthetic resin. The pin to which the ground contact 15 is attached has a ground potential, and the pin to which the dummy contact 16 is attached has, for example, a power potential.

A display board is fixedly disposed on the other plate surface side of the ground plate, and a mounting hole for the coaxial jumper is formed in this display board in continuation with the connection hole for the coaxial jumper, and a mounting hole is also formed in the display board. The connection position of the coaxial jumper is marked.

A display plate 17 is fixedly disposed on the other plate surface side of the ground plate 11, that is, on the plate surface side from which the pins 12 are not projected. The display board 17 has coaxial jumper mounting holes 18-11, 18-12,...18.
−mn is formed. When fixing this, the mounting holes 18-11, 18-12, . . . of the display board 17, etc.
18-mn is the connection hole 1 of the coaxial jumper, respectively.
It is necessary to align the position so that it is in a continuous position.

For this purpose, an assembly jig 20 as shown in FIG. 3 is used. This assembly jig 20 is formed so that a display board 17 can be placed on a surface, and on one surface, simulated jumpers 21-11, 21-12, . . . 21 are placed at positions corresponding to the coaxial jumper positions of the coaxial cables.
−mn is fixed and protrudes at right angles to the plate surface. The display board 17 is placed on the jig 20, and each of the simulated jumpers 21-11, 21-12,...
... is the mounting hole 18-11, 18-1 of the display board 17
2. Position it so that it penetrates... The ground plate 11 is placed on the display board 17 positioned and attached to the jig 20, and the simulated jumpers 21-11, 21-12 are inserted through the mounting holes 18-11, 18-12, . , ... are the connection holes 13-11, 13-1 of the ground plate 11
2. Position the ground plate 11 so that it is inserted into the...

The ground plate 11 and display board 17, which have been accurately positioned with respect to each other using the jig 20 in this manner, are fixed to each other with screws, for example.
In this state, the jig 20 is still assembled as shown in FIG. In this state, it is visually confirmed that the positions of the heads of the ground contact 15 and the dummy contact 16 fitted to the predetermined pin positions are the same.

A guide plate is fixedly arranged with respect to the ground plate on the side opposite to the fixed side of the display plate of the ground plate, and this guide plate has a guide plate having an axial center aligned with the connection hole and pin insertion hole of the ground plate. A signal pin insertion hole and a pin insertion hole are formed for guiding a pin from a circuit to be connected.

The guide plate 25 is made of an insulating material and is formed in the same rectangular shape as the ground plate 11, and the circuit to be connected is formed so that its axis is aligned with the connection hole 13 through which the coaxial jumper of the ground plate 11 is inserted. A signal pin insertion hole 28 is formed to guide a signal pin 27 from the circuit board 26 located therein. A taper whose radius is gradually enlarged is formed on the signal pin insertion hole 28 on the insertion side of the signal pin 27 so that the signal pin 27 can be inserted smoothly.

In addition, the ground pin 29 is inserted from the circuit board 26 on which the circuit to be connected is formed, with its axis aligned with the pin insertion hole 14 of the ground plate 11.
A ground pin insertion hole 30 is formed to guide the ground pin. Similarly, a taper whose radius is gradually enlarged is formed on the insertion side of the ground pin 29 of the ground pin insertion hole 30.
The structure is such that insertion can be performed smoothly.

This guide plate 25 is fixed to the ground plate 11. For this purpose, with the jig 20 still assembled, rectangular plate-shaped side bars 31-
1, 31-2 is installed. Sidebar 31-1,
Center bars 32-1 and 32-2 are disposed on the edge adjacent to the edge on which bar 31-2 is disposed, and are combined with each other at their ends. Center bar 32-1, 32
-2 has block-shaped fixing portions 34 integrally formed at both longitudinal ends of a bar portion 33 formed in substantially the same shape as the side bars 31-1 and 31-2. In the disposed state, this bar portion 33 is placed on the ground plate 11. This fixed part 3
4 is formed to be thicker in the direction perpendicular to the longitudinal direction of the bar portion 33 than in the same direction. Further, in this direction, the thickness of the fixing portion 34 from the bar portion 33 toward the display plate 17 is equal to the sum of the thicknesses of the display plate 17 and the ground plate 11.
Further, the thickness of the fixing part 34 on the side opposite to the display plate 17 with respect to the bar part 33 is set to be equal to the thickness of the guide plate 25.

The bar portions 33 of the center bars 32-1, 32-2 are placed on the opposing edges of the ground plate 11 as described above, and the side bars 31-1, 33 are placed on the adjacent edges of the ground plate 11. 31-
Position 2. Sidebar 31-1, 31-2
The thickness of the bar portion 33 in the direction perpendicular to the longitudinal direction is
The thickness is equal to that of the Also, the sum of the lengths of the protruding portions of the bar portions 33 located on the opposing edges on the ground plate 11 along the opposing adjacent edges, and the side bars 31-1, 31-2.
The sum of the lengths in the longitudinal direction is set equal to the length of the edge of the ground plate 11 on which the side bars 31-1 and 31-2 are placed. Therefore, on each edge of the ground plate 11, the side bars 31
-1, 31-2 and center bar 32-1, 32-
2 are continuously arranged around the entire periphery.

In this arrangement state, side bars 31-1, 31-2
and bar portion 3 of center bar 32-1, 32-2
A guide plate 25, a ground plate 11, and a display plate 17 are placed on plate surfaces facing each other at right angles to the longitudinal direction of the guide plate 3. In this state, the side bars 31-1, 31-2 and the center bar 32-
1 and 32-2, for example, by means of screws.

The guide plate 25 has a recess 36 formed around the ground pin insertion hole 30 into which the end of the ground contact 15 or dummy contact 16 is inserted. In the state where the display board 17, the ground plate 11, and the guide board 25 are located in the recess 36, the side bars 31-1 and 3
1-2 and the center bars 32-1, 32-2 are fixed to each other such that a peripheral side is formed.

Also, when fixing this, use the center bar 32-1,
As shown in FIG. 6, a reference pin 38 is inserted into the positioning hole at the center position in the longitudinal direction of 32-2, and the entire body is positioned using this reference pin 38 and finally fixed. With the display board 17, the ground plate 11, and the guide board 25 fixed to each other, the seventh
As shown in the figure, a driver 39 is inserted between the display board 17 and the jig 20 to remove the jig 20. Jig 2
0 is removed, a relay device 40 having a structure as shown in FIG. 8 is obtained.

A circuit board 26 to be connected to the relay device 40 is mounted from the guide plate 25 side. Prior to mounting the circuit board 26, a dummy post 41 is screwed and fixed to the ground pin insertion hole 30 at a predetermined position of the guide plate 25 so as to close the hole. This dummy post 41 is attached to the ground contact 15 at a position where the ground pin 29 does not protrude from the circuit board 26, and the coaxial jumper 43
The ground contact 1 is elastically deformed by the outer conductor of the coaxial jumper 43 when installed.
5 should not be deformed beyond a predetermined value. That is, by attaching the dummy post 41, the end of the ground contact 15 on the guide plate 25 side is positioned, and large deformation does not occur.
The mounting position of this dummy post 41 is, for example, the position drawn in a double circle shape in FIG. 4.

In this device, the cylindrical ground contact is formed with a groove that divides the ground contact into a plurality of parts in the axial direction, and a coaxial jumper is inserted into the axial center of the ground contact through the mounting hole and the connecting hole. A protrusion is formed that elastically contacts the outer peripheral surface.

The ground contact 15 is formed of a conductive material and has a substantially cylindrical shape, and has grooves 51-1, 51 extending in the axial direction from the end located on the guide plate 25 side through the center when installed.
-2 are formed facing each other, and the ground contact 1
5 is divided into two in the axial direction. In addition, the ground contact 15 has a groove 52 extending axially from the end located on the ground plate 11 side through the center when installed.
-1, 52-2 are kerf grooves 51-1, 51-2
The ground contacts 15 are formed to face each other and are shifted by 90 degrees, dividing the ground contact 15 into two in the axial direction.

Further, a protrusion 53 is integrally formed on the outer peripheral surface of the ground contact 15 at an intermediate position in the axial direction. The protrusion 53 has the respective grooves 51-1 and 51-1.
It is formed by bending the peripheral surfaces sandwiched by 1-2, 52-1, and 52-2 outward. With the protrusion 53 formed, the total length of the ground contact 15 is approximately equal to the total length of the dummy contact 16 made of an insulating material such as synthetic resin.

The guide plate 25, the ground plate 11, and the display plate 17 are fixedly assembled so that their peripheral surfaces are formed by the side bars 31-1, 31-2 and the center bars 32-1, 32-2, A ground contact 15 or a dummy contact 1 is connected to the pin 12 set on the ground plate 11.
6 are fitted together to form a coaxial cable relay device. A guide plate 25 for this coaxial cable relay fitting.
A circuit board 26 is mounted on which the circuit to be connected from the side is formed.

By installing the circuit board 26, the circuit board 26
The signal pin 27 from the signal pin insertion hole 28,
Further, the ground pin 29 from the circuit board 26 is positioned to protrude into the coaxial cable relay from the ground pin insertion hole 30, and the ground pin 29 is held by the end of the ground contact 15 or the dummy contact 16.

The coaxial jumper 43 of the coaxial cable to be relayed is attached to the coaxial cable relay fitting through the mounting hole 18 of the display plate 17 and the connection hole 13 of the ground plate 11 according to the indication attached to the display plate 17.

The coaxial jumper 43 is attached to the attachment side end of the coaxial cable, and its peripheral surface forms the outer conductor of the coaxial cable. By inserting the coaxial jumper 43, the insertion side end crosses over the protrusion 53 of the ground contact 15 from its gently sloped side, the protrusion 53 is pushed by the outer peripheral surface of the coaxial jumper 43, and the ground contact 15 becomes elastic. Be biased.

The outer conductor of the coaxial cable and the ground contact 15 come into complete elastic contact through the outer circumferential surface of the coaxial jumper 43, and by being elastically biased from the ground contact 15, the ground pin 29 is reliably clamped at its end and a predetermined contact is established. pressure is obtained. The outer conductor of the coaxial cable installed in this way is completely grounded. On the other hand, the signal pin 27 is inserted into the end of the coaxial jumper 43, and the two are in complete electrical contact.

Since the dummy post 41 is inserted into the ground contact 15 where the ground pin 29 is not installed, even if it is pushed by the outer peripheral surface of the coaxial jumper 43, the deflection is suppressed within a predetermined amount.
The ground contact 15 is never permanently deformed or destroyed.

The ground contact 15 or dummy contact 16 is attached to the pin 12 set on the ground plate 11 with a low contact pressure, and can be inserted smoothly with a small force. Further, since the ground contact 15 is in the form of a support spring at both ends, it contacts the coaxial jumper 43 with a strong force and improves its locking force. For example, a power potential is applied to the ground pin 29 inserted into the dummy contact 16, so the dummy contact 16 shields and protects the pin, and additionally guides the coaxial jumper 43 when it is attached.

The coaxial cable relay device of this invention has a simple and strong overall structure, and can be easily attached to the circuit board 26 from which a large number of ground pins 29 and signal pins 27 are taken out, and the coaxial jumper 43 of the coaxial cable to be relayed. can be easily attached according to the instructions on the display board 25. The outer conductor of the attached coaxial cable is completely grounded and stably held with respect to the relay, and the signal pin 27 can be reliably connected to the core wire of a predetermined coaxial cable.

As explained in detail above, according to this idea,
It can be easily attached to the circuit board to be connected where the ground pin and signal pin are protruding, and the coaxial cable to be attached can also be easily attached, and the overall structure is not large-scale and can be easily attached. The coaxial cable is stably held with its outer conductor completely grounded, and the core wire of the coaxial cable is electrically and reliably connected to a predetermined terminal on a circuit board. can do.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the shape of the ground plate and pins to be inserted and planted in an embodiment of the coaxial cable relay device of this invention, and Fig. 2 shows the configuration of the main parts of the embodiment of the coaxial cable relay device of this invention. Sectional view shown, 3rd
5 and 6 are views showing the assembled state of an embodiment of the coaxial cable relay device of this invention, and FIG. 4 shows an example of mounting of the ground contact and dummy contact of the coaxial cable relay device of this invention. Figure, 7th
The figure shows the removed state of the jig in the embodiment of the coaxial cable relay device of this invention, Figure 8 shows the configuration of the embodiment of the coaxial cable relay device of this invention, and Figure 9 shows the coaxial cable relay device of this invention. A plan view showing the configuration of an embodiment of the cable relay device, FIG. 10 is C in FIG. 9.
-C sectional view. 11: Ground plate, 12: Pin, 13,
13-11, 13-12, ...: connection hole, 14,
14-11, 14-12, ...: insertion hole, 15:
Ground contact, 16: Dummy contact,
17: Display board, 18, 18-11, 18-12,
...: Mounting hole, 20: Assembly jig, 21-11, 2
1-12, ...: Simulated jumper, 24: Dummy post, 25: Information board, 26: Circuit board, 27:
Signal pin, 28: Signal pin hole, 29: Ground pin, 30: Ground pin insertion hole, 31-1, 31
-2: Side bar, 32-1, 32-2: Center bar, 33: Bar portion, 34: Fixed portion, 36: Recess, 38: Reference pin, 40: Relay, 43: Coaxial jumper, 51-1, 51-2, 52-1, 5
2-2: Cut groove, 53: Projection.

Claims (1)

[Scope of utility model registration request] Connection holes 13 into which a plurality of coaxial jumpers are inserted are formed in a matrix in the ground plate 11, and four pins are inserted in a matrix at equal angular intervals with respect to the center of each connection hole. Insertion holes 14 are formed, pins 12 are inserted into these pin insertion holes, and a cylindrical gland is inserted from one plate side of the ground plate to the pins installed in these pin insertion holes. A contact 15 or a cylindrical dummy contact 16 is fitted and mounted, and a display plate 17 is fixedly disposed on the other plate surface side of the ground plate, and the display plate 17 is provided with the contact hole 16 connected to the connection hole. Attachment holes 18 for coaxial jumpers are formed, and the indication plate shows the connection position of the coaxial jumper with respect to these attachment holes, and a guide plate 25 is provided on the side of the ground plate opposite to the fixed side of the indication plate. is fixedly arranged with respect to the ground plate, and this guide plate is provided with a signal for guiding the pin from the circuit to be connected so that the axial center position coincides with the connection hole and pin insertion hole of the ground plate, respectively. A pin insertion hole 28 and a ground pin insertion hole 30 are formed, and grooves 51 and 52 are formed in the cylindrical ground contact to divide the ground contact into a plurality of parts in the axial direction,
A coaxial cable relay characterized in that a protrusion 53 is formed at an axial center position of the ground contact to make elastic contact with the outer peripheral surface of the coaxial jumper inserted through the mounting hole and the connection hole. Ingredients.