JP2003308899A - Terminal device for printed board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a number of external connection signals to be efficiently connected to a printed board. <P>SOLUTION: External cables (Fig. 1-1) are connected to a number of terminal screws (Fig. 2-7) for carrying external signals. A stepped box body (Fig. 5-11) has lines of holes for the terminal screws in steps. The box body (Fig. 5-12), on which the printed board (Fig. 2-2) having circuits mounted thereon for processing the external signals is placed, has a mechanism (Fig. 5-14, Fig. 7-16) which makes part of the terminal screws contact conductive portion terminal pins of the printed board and which is joined to the reverse of the box body 11. These two joined bodies are arranged on both sides of the printed board and the printed board can be fixed at both sides thereto. A fixed L-fitting (Fig. 2, Fig. 4-6) has holes so that the printed board placed on the box body 12 is fixed at both ends downward with the screws and its ends are threaded to both side faces of the box body 11, whereby it can be opened/closed with a line connecting the screws as an axis. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board terminal device for connecting an external signal to a circuit mounted on a printed circuit board.

[0002]

2. Description of the Related Art As a conventional technique of this type, Japanese Patent Laid-Open No. 07-
The "terminal device for printed circuit board" described in 22094 can be mentioned. In this printed circuit board terminal device, the terminal block is placed on the printed circuit board, and the terminal screws are arranged in two rows in different stages. The terminal screw is screwed with the terminal plate body of the terminal plate to connect the connection conductor, and the leg portion of the terminal plate is electrically connected to the conductive portion of the printed board.

The leg portion of one row of the terminal board projects from the lower side of the terminal board body of the other row toward the printed board, and only the lower side of the other terminal board body is placed on the printed board. The legs of the terminal board are electrically connected to the conductive parts of the printed circuit board. As a result, the area of the terminal block that is not mounted on the printed circuit board can be used for mounting other components, so that the printed circuit board can be used effectively.

[0004]

However, in the above-mentioned prior art, since the terminal block is directly mounted on the printed circuit board, several contact signal transmission / reception logic circuits are mounted on one printed circuit board. However, if the number of contact signal transmitting / receiving logic circuits becomes large, there is a first problem that the terminal block mounting area cannot be reduced by overlapping the terminal boards.

For example, for contact signal transmission / reception mounted on a printed circuit board in a remote station board (hereinafter referred to as "RS board"), contact signals transmitted / received for remote monitoring and control of a plurality of equipments in a building. This is the case when connecting to a logic circuit. In this case, conventionally, the size of the printed circuit board is increased to improve the housing efficiency, or a terminal box for housing a large number of printed circuit boards and an external line connection terminal block are separately provided and connected between them with a one-to-one cable. There is. The work efficiency is poor because it is necessary for the worker to carry out the wiring work twice, that is, the connection of the external cable connected to each terminal block and the connection of the external connection terminal block and the printed circuit board. Further, the mounting efficiency in the RS board is poor and the cost is high.

Further, in the above-mentioned prior art, since the terminal block is directly mounted on the printed circuit board, the terminal is mounted when the logic circuit mounted on the printed circuit board has a defect or when the printed circuit board is replaced. There is a second problem that it is inconvenient because it requires a work to separate the outside line connected to the stand.

An object of the present invention is to provide a printed circuit board terminal device capable of efficiently connecting a large number of external connection signals to a printed circuit board.

Another object of the present invention is to provide a printed circuit board terminal device which is convenient for construction and maintenance work.

[0009]

SUMMARY OF THE INVENTION A printed circuit board terminal device of the present invention is a terminal block for connecting an external line for transmitting and receiving a plurality of external signals, a terminal screw for the external signal on the terminal block, and an external signal. And a terminal block for a printed circuit board on which a circuit for processing the above is mounted, and the printed circuit board can be fixed on both sides by the two coupling members.

More specifically, the printed circuit board terminal device includes a large number of terminal screws (7 in FIG. 2) to which signal lines of a cable (1 in FIG. 1) for carrying an external signal are connected, and terminal screws for terminal screws. A first box-shaped body (11 in FIG. 5) in which rows of holes are provided in each stage and a printed circuit board (2 in FIG. 2) on which a circuit for processing an external signal is mounted are placed. A second box-shaped body (which is connected to the back surface of the first box-shaped body having a mechanism (14 in FIG. 5 and 16 in FIG. 7) for contacting a part of the terminal screw with the terminal pin of the conductive portion of the printed board ( (12 in FIG. 5)
Place two couplings consisting of and on both sides of the printed circuit board,
The feature is that the printed circuit board can be fixed on both sides.

As described above, since the terminal block for connecting the external line and the terminal block for the printed circuit board are combined into one terminal block,
Since the conventional terminal block housing box and the connection cable for connecting the terminals are not required, it is possible to further increase the number of monitoring control points of the equipment.

Further, a fixed L metal fitting having holes for fixing both ends of the printed circuit board terminal block or the printed circuit board mounted on the second box-shaped body from above with screws (FIGS. 2 and 2). The terminal block for external line connection is
Alternatively, both sides of the first box-shaped body are screwed to each other so that the line connecting the screws can be opened and closed around the axis. Therefore, the terminal block for external line connection and the printed circuit board can be easily removed, and the operator can easily perform maintenance.

Further, the flat washer which constitutes the terminal screw is a pin for connecting with the terminal pin of the conductive portion of the printed circuit board (FIG. 6).
And the terminal block for the printed circuit board or the second box-shaped body has a moat (14 in FIG. 5) for accommodating the pins when screwed. For this reason, contact failure does not occur between the terminal block for external line connection and the conductive portion of the printed circuit board.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows an RS to which the present invention is applied.
It is a mounting front view of a board. In order to remotely monitor and control a plurality of equipment in a building, contact signals are transmitted and received in the RS board. In FIG. 1, an external cable 1 carrying a contact signal,
The state which connects the printed circuit board 2 which mounts the contact signal transmission / reception logic circuit (illustration omitted) which converts a contact signal into a logic signal is shown.

A large number of external line cables 1 are guided to a terminal block A and a terminal block B via an external line intake duct 3 and a cable duct 4, and are connected to a central printed circuit board 2 there. The terminal board A, the terminal board B, and the printed board 2 are supported by the terminal board 5.

FIG. 2 is a plan view in which the printed circuit board 2 is mounted between the terminal block A and the terminal block B by two fixing L metal fittings 6. As shown in the plan view of FIG. 3, each of the terminal blocks A and B has 50 terminal screws arranged in two rows. The notation indicating the position of each terminal screw 7 is provided on the left and right of the terminal screw row.

The printed circuit board 2 is placed on the notation portion of the terminal screw position, and the fixed L metal fitting 6 is put on the printed circuit board 2 and screwed from the three mounting holes 8. Since the whole body of the terminal blocks A and B is made of thermosetting resin, it is possible to ensure flame retardancy and insulation.

As shown in the plan view of FIG. 4, the fixed L metal fitting 6 has three mounting holes 9 at the same positions as the mounting holes 8, and the terminal block is provided at the portion extending leftward from the upper and lower ends. It has a mounting hole 10 for screwing to the body of A and the terminal block B. Although FIG. 4 shows a case where it is used for the terminal block A, since the fixed L metal fitting 6 is vertically symmetrical, it can be used for the terminal block B.

The fixed L metal fitting 6 can be mounted in the mounting hole 1 by loosening the screw in the mounting hole 9 and slightly loosening the screw in the mounting hole 10.
It is possible to rotate the 0 screw as a center in the front direction of the drawing, whereby the printed circuit board 2 can be attached and detached.

FIG. 5 is a perspective view showing the assembly of the terminal block A and the attachment of the fixed L metal fitting 6 to the terminal block A. The same applies to the assembly of the terminal block B and the fixed L fitting 6.

The terminal block A is composed of two box-shaped bodies 11 and 12. The box-shaped body 11 is a box-shaped body 12.
The box-shaped body 12 is united with screws at a total of four places on the left and right and two places above. The box-shaped body 11 is
The screw holes 13 for the terminal screws 7 arranged in two stages of the platform are formed. There are 24 screw holes 13 in the upper portion and 26 screw holes in the lower portion, and a total of 50 screw terminals 7 can be mounted.

Specifically, the terminal screw 7 is composed of a screw, a spring, a washer, and a flat washer, as shown in FIG. The flat washer is shown in FIG.
As shown in FIG. 6A, it is L-shaped, and in the lower part, it is linear as shown in FIG. 6B. Each flat washer has a bent portion bent in a convex shape.

The box-shaped body 12 has the same height as the lower portion of the box-shaped body 11, and is provided with a concave groove 14 for individually accommodating the plain washers coming out from the box-shaped body 11. There is. The concave groove 14 is adapted to accommodate the bent convex portion of the flat washer when the box-shaped body 11 and the box-shaped body 12 are combined. When the printed board 2 is attached, the bent convex portion of the flat washer has elasticity and comes into contact with the conductive portion terminal pin of the printed board 2.

Further, two guide pins 15 are provided at the corners of the box-shaped body 12 at both upper ends. Guide pin 1
Corresponding to No. 5, holes are provided on the upper, lower, left and right sides of the printed circuit board 2, and by inserting the guide pins 15 into the holes, the position of the terminal number can be easily confirmed. This makes it possible to accurately align the left and right 50 terminal screws 7 with the conductive terminal pins of the printed circuit board 2.

The fixed L fitting 6 in FIG. 5 shows only the central portion, and the end portion including the mounting hole 10 is not shown. After the printed circuit board 2 is placed on the upper surface of the box-shaped body 12, the fixed L metal fitting 6 is put over the printed circuit board 2 and screwed from the three mounting holes 9.

Next, a method of using the present embodiment having the above structure will be described.

The external cable 1 carrying the contact signals from a plurality of equipments installed in the RS board is connected to the screw terminal 7. Since a contact signal requires two contacts for each point, in general, the printed circuit board terminal device can accommodate a maximum of 50 contacts for the terminal blocks A and B.

To connect the external cable 1 and the printed circuit board 2, the fixed L metal fitting 6 is opened, and the printed circuit board 2 is placed on the box-shaped body 12 of the terminal block B along the guide pins 15. The fixed L metal fitting 6 is opened at an angle of 130 degrees. Figure 7
It is sectional drawing of the terminal screw 7 in this case. At this time, the position of the terminal number is confirmed. In FIG. 7, the flat washer 16 of the terminal screw 7 has a spring characteristic and elastically contacts the conductive terminal pin of the printed circuit board 2. This is a plain washer 1
This is to strengthen the contact between the convex portion of 6 and the terminal pin of the conductive portion so that the connection portion between the terminal screw 7 and the printed circuit board 2 increases the strength against external force.

After that, the fixed L metal fitting 6 is rotated and laid down on the printed circuit board 2, and tightened from the mounting hole 9 with three screws. As a result, the printed circuit board 2 can be fixed to the terminal block B. The contact signal of the external cable 1 is transmitted through the flat washer 16 of the terminal screw 7 and the conductive portion terminal pin of the printed board 2,
It is guided to a contact signal transmission / reception logic circuit mounted on the printed circuit board 2.

Also, at the time of connecting the external cable or replacing the printed circuit board 2, it is easy to remove the printed circuit board 2 by loosening the three screws fastening the fixed L metal fitting 6 and opening the fixed L metal fitting 6. Can be For this reason, there is no possibility of damaging the printed circuit board, such as burnout due to erroneous wiring when the printed circuit board 2 is not removed, and reliability and cost can be reduced.

[0032]

According to the present invention, since the external line connection terminal block and the printed circuit board are integrated in a limited space within the RS board, the conventional terminal block housing box and the connection for connecting the box are provided. Since the cable is unnecessary, it is possible to obtain the first effect that the number of monitoring control points of the equipment can be increased.

Further, the print main body can be easily removed from the terminal block by loosening the three screws of the fixed L metal fitting without removing the external cable from the terminal screw.
It is also possible to obtain the second effect that the convenience can be improved at the time of the external wire connection work and the inspection / replacement of the printed circuit board.

[Brief description of drawings]

FIG. 1 is a mounting front view of an RS board to which the present invention is applied.

FIG. 2 is a plan view when a printed circuit board is attached to a printed circuit board terminal device according to an embodiment of the present invention.

FIG. 3 is a plan view of a terminal block in a printed circuit board terminal device according to an embodiment of the present invention.

FIG. 4 is a plan view of a fixed L metal fitting in a printed circuit board terminal device according to an embodiment of the present invention.

FIG. 5 is a perspective view showing the assembly of the terminal block and the attachment of the fixed L metal fitting to the terminal block in the printed circuit board terminal device of one embodiment of the present invention.

FIG. 6 is a configuration diagram of a terminal screw in a printed circuit board terminal device according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of a terminal screw in a printed circuit board terminal device according to an embodiment of the present invention.

[Explanation of symbols]

1 External cable 2 printed circuit boards 3 Outside line intake duct 4 cable ducts 5 terminal board 6 fixed L metal fittings 7 terminal screw 8 mounting holes 9 mounting holes 10 mounting holes 11 Box-shaped body 12 Box-shaped body 13 screw holes 14 groove 15 guide pins 16 flat washers A terminal block B terminal block

Claims (4)

[Claims] 1. A terminal block for connecting an external line for transmitting and receiving a plurality of external signals, and a terminal screw for the external signal on the terminal block,
A terminal unit for a printed circuit board, which is integrally connected to a terminal block for a printed circuit board on which a circuit for processing the external signal is mounted, and the printed circuit board can be fixed on both sides by the two combined bodies. . 2. A plurality of terminal screws to which signal lines of a cable for carrying an external signal are connected, and a first box-shaped body in the form of a platform in which rows of holes for the terminal screws are provided in each stage. A printed circuit board on which a circuit for processing the external signal is mounted is placed, and a part of the terminal screw is coupled to a back surface of the first box-shaped body having a mechanism for contacting a conductive portion terminal pin of the printed circuit board. A terminal device for a printed circuit board, wherein two combined bodies each including the formed second box-shaped body are arranged on both sides of the printed circuit board so that the printed circuit board can be fixed on both sides. 3. An end portion of a fixed L metal fitting having a hole for fixing both ends of the terminal block for the printed circuit board or the printed circuit board mounted on the second box-shaped body from above with screws. 2. The terminal block for connecting the outside wire or both side surfaces of the first box-shaped body is screwed to enable the opening and closing with a wire connecting the screws as an axis.
Alternatively, the printed circuit board terminal device according to claim 2. 4. A flat washer forming the terminal screw has a pin for connecting to a conductive portion terminal pin of the printed board, and a terminal block for the printed board, or the second board.
4. The printed circuit board terminal device according to claim 1, wherein the box-shaped body has a moat for accommodating the pin at the time of coupling.