JPH0426188B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is applicable to CATV amplifiers, public listening equipment, etc.
This invention relates to relay connection terminals used in transmission equipment.

Conventional technology Conventionally, CATV amplifiers, public listening equipment, etc.
CATV transmission equipment is attached to utility poles or messenger wires, and each device is connected by a signal transmission cable. If an abnormality occurs in the device, it is difficult to replace the device itself because a signal transmission cable is connected to the device itself. Therefore, it is easier to replace the unit inside the equipment or replace the entire internal part. The power source for driving the equipment is a commercial power source lowered to several tens of volts using a transformer, and is supplied directly using a power cable or by being superimposed on a signal transmission cable.

5 to 8 show a conventional method of connecting relay connection terminals. In FIG. 5, reference numeral 1 denotes a connector that connects to a signal transmission cable and receives signals. 2 is the device case, which is made of aluminum die-casting or the like. 3 is a printed circuit board with a built-in circuit. Reference numeral 24 denotes a relay connection line that connects the core wire of the plug and the printed circuit board 3 that is the circuit input. Reference numeral 25 denotes a soldering portion where soldering is performed as a fixing method.

In FIG. 6, 10 is a core wire of the connector, and 27 is an L fitting for bringing the core wire 10 of the connector into contact with the printed circuit board 3. 28 is a flat metal fitting for fixing screws. 29 is a screw for fixing the core wire of the plug. still,
3 is a printed circuit board with a built-in circuit.

7 and 8, 10 is the core wire of the plug, 2
Reference numerals 1 and 22 are relay connection terminals that connect the core wire 10 of the plug and the printed circuit board that is the circuit input.

The operation of the relay connection terminal configured as described above will be described below.

In FIG. 5, when a signal transmission cable is first connected to the plug 1, the signal is transmitted through the relay connection line 24 and then transmitted to the circuit input of the printed circuit board 3. When the power source is superimposed on the cable, current flows through the printed circuit board 3, the relay connection line 24, the soldered portion 5, and the plug 1.

In FIG. 6, a signal is first transmitted from the core wire 10 of the connector to the straight printed circuit board 3. In FIG. When power is superimposed on the cable, current flows from the printed circuit board 3 to the core wire 10 of the connector.

In Figures 7 and 8, first, the core wire 1 of the connector
0 through relay connection terminals 21 and 22. The difference between FIG. 7 and FIG. 8 is that the relay connection terminal is in line contact with the tangential core wire and in the case it is in surface contact.

Problems to be Solved by the Invention However, in FIG. 5, the core wire of the connector is soldered, making it difficult to replace the printed circuit board for maintenance. In FIG. 6, since screws are used, it takes time to replace the printed circuit board.

In Figs. 7 and 8, relay connection terminal 2
When an external force is applied to 1 and 22, they are easily deformed and the contact between the core wire and the relay connection terminal is likely to be incomplete. Furthermore, due to manufacturing variations, the core wire 10
If the relative positions of the terminals and the relay connection terminals 21 and 22 are even slightly shifted, the contact becomes incomplete, resulting in a decrease in reliability. Therefore, it has been desired to develop a highly reliable relay connection terminal that allows for easy replacement of the printed circuit board, secure contact between the core wire of the plug and the relay connection terminal.

In view of the above-mentioned problems, the present invention provides a highly reliable relay connection terminal that allows easy replacement of the printed circuit board and secure contact with the core wire of the connector.

Means for Solving the Problems In order to achieve this object, the relay connection terminal of the present invention is provided with a substantially U-shaped contact piece fixed to an insulating case on the printed circuit board side, and connects the core wire of the connector to the printed circuit board. An opening is provided in the insulating case so that the approximately U strip-shaped contact piece can be fitted into the connector, and the insulating case can be attached and removed in a direction perpendicular to the axial direction of the core wire. It is prepared.

Function The relay connection terminal of the present invention is provided with a substantially U strip-shaped contact piece fixed to an insulating case on the printed circuit board side, and the core wire of the connector and the substantially U strip-shaped contact piece on the printed circuit board fit together to establish a relay connection. By doing so, it is possible to transmit signals, and by providing an opening on the core wire insertion side of the insulating case that fixes the approximately U strip contact piece, the core wire can be attached and detached in a direction perpendicular to the axial direction of the core wire. Printed circuit boards can be easily attached and detached.

Furthermore, the insulating case prevents external force from being applied to the direct relay connection terminal, protects the relay connection terminal from deformation, and ensures dimensional accuracy. In addition, when the approximately U strip-shaped contact piece and the core wire are fitted together, the opening in the insulating case has a guiding function, so that even if the relative position of the approximately U strip-shaped contact piece and the core wire varies, the insulating case will remain stable. The guide allows for smooth insertion and mating. In addition, since the approximately U-band contact piece itself has a flexible function, even if the core wire is slightly misaligned, the contact piece itself can follow and move, allowing for more reliable contact and reliability. can be improved.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a relay connection terminal of CATV transmission equipment in one embodiment of the present invention.

In FIG. 1, 10 is a core wire of a plug for signal transmission. Reference numeral 4 denotes an insulating case (hereinafter referred to as a relay connection terminal cover) that covers the relay connection terminal and is made of an insulating material such as plastic. Reference numeral 5 denotes a relay connection terminal which is a metal conductor portion and has a substantially U-shaped contact piece. Reference numeral 3 denotes a printed circuit board having holes 14 and slits 13 that fit into the relay connection terminal legs.

In FIG. 2, the relay connection terminal 5 is integrated by inserting and fixing the legs 6 into the bottom holes of the relay connection terminal cover 4. A terminal convex portion 9 is formed on the leg portion 6 of the relay connection terminal 5 to provide a detachment prevention function. The integrated relay connection terminal is inserted into the printed circuit board 3 through the hole 14 and soldered.

Figure 3 shows case 2 made of aluminum die-casting, etc.
This figure shows a state diagram in which an FT type connector or an F type connector 1 for monitoring is fixed.

FIG. 4 is a plan view of the relay connection terminal 5, showing a state before the core wire 10 of the plug and the relay connection terminal 5 are fitted together.

The relay connection terminal configured as described above can be operated in a direction perpendicular to the axial direction of the core wire (A direction) and in an axial direction (B direction).
direction) and can be attached and detached.

First, a case where the core wires are fitted in a direction perpendicular to the axial direction will be explained. The plug 1 is screwed and fixed to the case 2. As shown in FIG. 2, the relay connection terminal 5 integrated with the relay connection terminal cover 4 is soldered and fixed to the printed circuit board 3. As shown in FIG.
(Solder parts not shown). Arrow A inside case 2
When the printed circuit board 3 is inserted in the direction shown in FIG.

The inner dimension d of the fitting portion of the approximately U strip contact piece 12 is set to be slightly smaller than the core wire diameter D of the plug, and a terminal recess 8 is provided to provide elasticity in the direction of arrow C. With this configuration, the core wire 10 of the plug is constantly pressed from both sides by the substantially U-band contact pieces 12, and a highly reliable electrical connection can be achieved.

Furthermore, due to manufacturing variations, the core wire 1 of the connector
0 and the substantially U strip-shaped contact piece 12 in the X, Y, and Z directions, the substantially U strip-shaped contact piece 12 flexibly follows the core wire 10 of the plug to ensure reliable contact and connection. I can do it.

Note that an insulating case opening (hereinafter referred to as terminal cover opening) 15 provided at the center lower part of one side wall of the relay connection terminal cover 4 (having an inclined part 16 at the lower part) prevents the core wire 10 of the connector from being misaligned. Even if this occurs, the terminal cover opening 15 serves as a guide, allowing smooth insertion and fitting.

When the printed circuit board 3 is pulled up in the direction opposite to the arrow A, the approximately U-band-shaped contact piece 12 and the core wire 10 of the plug are disengaged from each other, and the printed circuit board 3 can be removed from the case 2.

Next, the case where the core wires are fitted in the axial direction (direction B) will be explained using mainly FIGS. 3 and 4. In FIGS. 3 and 4, the printed circuit board 3 is fixed by bosses, screws, etc. provided on the case 2.
When the connector 1 is fixed to the case 2 with screws, the core wire 10 of the connector moves in the direction of arrow B, and the approximately U-shaped connector piece 1
2 and the core wire 10 of the connector fit together, and the core wire 10 of the connector
- The relay connection terminal 5 and the printed circuit board 3 can be electrically connected. Incidentally, the connector 1 may be first fixed to the case 2, the printed circuit board 3 may be slid, and the core wire 10 of the connector may be fitted with the relay connection terminal 5 for connection. The terminal tip 11 of the relay connection terminal 5 can be inserted and fitted smoothly even if the core wire 10 of the plug and the substantially U-shaped contact piece 12 are misaligned, the terminal tip 11 serves as a guide.

Effects of the Invention As described above, the present invention prevents deformation of the U strip contact piece due to external forces such as impact during handling or transportation of parts by fixing the relay connection terminal to the insulating case and integrating it. The U-band contact piece allows the core wire of the plug and the U-band contact piece to reliably fit and connect even if a slight positional shift occurs, maintaining a stable contact state and improving reliability.

In addition, by introducing the shape of the U strip contact piece,
Compared to conventional products, it can be made smaller, has less contact loss, and can improve performance.

Furthermore, it can be attached and detached not only in the direction perpendicular to the axial direction of the core wire, but also in the axial direction, thereby expanding the range of uses.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a relay connection terminal of a CATV transmission device according to an embodiment of the present invention, and Fig. 2 is a cross section taken along line E-E in Fig. 1 showing the relay connection terminal inserted into a printed circuit board. Figure 3 is a cross-sectional view taken along the line F-F in Figure 1 showing a state in which the relay connection terminal and the core wire of the connector are fitted together, and Figure 4 is a sectional view before the connector core wire and relay connection terminal are fitted together. 5, 6B, 7B, and 8B are cross-sectional views of the conventional example,
6A, 7A, and 8A are perspective views of conventional examples. 1...Plug, 2...Case, 3...Printed circuit board, 4...Relay connection terminal cover (insulation case),
5... Relay connection terminal, 6... Leg, 7... Leg hole for terminal soldering, 8... Terminal recess, 9... Terminal protrusion,
10... Core wire of the plug, 11... Terminal tip, 12...
...Approximately U band-shaped contact piece, 13...Slit, 14...
Hole, 15...Cover opening.

Claims (1)

[Claims] 1 Equipped with CATV transmission equipment in which a connector such as FT type or F type is attached to a case made of zinc or aluminum for signal transmission, and a slit is formed in the axial direction of the core wire of the connector and the core wire inside the case. In order to connect the printed circuit board to the printed circuit board, an insulating case is provided above the slit of the printed circuit board in which an opening is formed in a direction perpendicular to the axial direction of the core wire. A relay connection terminal for CATV transmission equipment, in which a core wire of the plug and the substantially U-shaped contact piece are removably fitted.