JPH055653Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a terminal block for connecting electric wires, which is used in an electrical product in which a printed board is housed in a metal case.

[Prior Art] With the recent development of electronics, printed circuit boards are increasingly being incorporated into power control equipment. A terminal block is sometimes installed on a printed board to connect external electric wires to the printed board, but the printed board cannot withstand the external stress caused by large-diameter wires, so the terminal block is attached to a mechanically strong equipment case. It is like that.

FIG. 3 is a perspective view of an example of a terminal block for a printed board. Reference numeral 1 denotes a terminal block, which has a plurality of screw terminals 2 arranged in a row to which external electric wires are connected, and has mounting holes (bunk holes) 3 formed at both ends of this terminal row, so that adjacent terminals can be connected to each other. A partition piece 1A is provided that protrudes from the space to the front. In FIG. 4, 4 is a lead extending from the terminal 2 and connected to the printed board 8. Reference numeral 5 refers to the lower part (hereinafter sometimes referred to as frame) of the metal case housing the printed circuit board, and a frame mounting portion 5A extends in a protruding manner, and a tap hole 6 is formed at the tip thereof. has been done. 7 is a screw as a male screw for installation.

FIG. 4 is a cross-sectional view showing how the terminal block is installed, and numeral 9 indicates the upper part of the metal case.

FIG. 5 is a front view showing the installation state of the terminal block.

The terminal block 1 is integrated with the printed board 8 by soldering (solder immersion) the lead 4 portion thereof onto the printed board 8 together with other small components. When the assembly of the device progresses and the printed circuit board 8 is attached to the frame 5, insert the tap hole 6 part of the frame 5 behind the terminal block 1, and insert the screw 7 from the front side of the terminal block 1 into the mounting hole of the terminal block 1. 3 into the tap hole 6 of the frame 5, and connect the terminal block 1 to the frame 5.
Fixed to. The front side of the terminal block here refers to terminal 2.
This refers to the front of the terminal block 1 facing the operator when connecting external electric wires.

If one of the terminals 2 on the terminal block 1 is a frame ground terminal, separately connect the lead wire 1 with a crimp terminal.
0 is wired between the frame ground terminal and the frame 5.

[Problem to be Solved] However, the above terminal block causes some problems when attached to the frame. That is, (1) When attaching the terminal block 1 to the frame 5, the frame 5 must be inserted into the narrow space between the terminal block 1 and the printed circuit board 8, which is very difficult to attach.

(2) A partial cutout may be required in the printed circuit board 8 to allow the frame 5 for fixing the terminal block 1 to pass through.

(3) If there is a frame ground terminal, the frame ground wire 10 must be installed separately.

The present invention is an attempt to solve the above-mentioned problems, and aims to provide a terminal block that does not require insertion into narrow spaces and has a structure that facilitates equipment assembly.

[Means for Solving the Problem] The frame has frame mounting parts equal to the number of the above-mentioned mounting holes, longitudinal notches are formed at the ends of the mounting parts, and the terminal block mounting holes are formed in these notches. A screw hole into which a screw is inserted through the notch is formed in a mounting portion provided on the same side as the terminal, and a lead connected to the printed board extends from at least one of the screw holes, and the head of the screw The above-mentioned frame attachment part is clamped between the frame and the frame so that it is fixed and supported by the frame.

[Function] The present invention replaces the conventional method of fixing the terminal block by inserting a screw into the tap hole of the frame with the terminal block in the middle, by passing the screw through a simple hole in the frame. In order to fix the terminal block by screwing into the female screw at the back, the terminal block mounting hole is a female screw into which a male screw can be inserted from the front.

Furthermore, when introducing a frame ground wire to a printed board, in order to take advantage of the fact that the female mounting screw has the same potential as the frame, a lead for electrical connection with the printed board is provided on the mounting screw. There is.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, the terminal block 1 has mounting portions 11A at both ends thereof, and also has a mounting portion 12A at the central portion in the longitudinal direction.
A mounting screw hole 11 is formed in the mounting portion 12.
A mounting screw hole 12 is also formed in A. This mounting screw hole 12 is a screw hole with a lead.

Frame 5 has three frame attachment parts 5A and 5.
A notch 13 having a predetermined depth is formed at the end of each frame attaching portion 5A, 5B from the upper end. The width of this notch 13 is larger than the diameter of the threaded portion 7B of the screw 7, but smaller than the diameter of the head 7A.

FIG. 2 is a cross-sectional view of this embodiment, with 14
is a spacer for providing a distance between the printed board 8 and the frame 5.

The terminal block of this embodiment is constructed as described above, and is assembled and operated as follows.

The terminal block 1 is integrated with the printed board 8 by soldering (solder immersion) the lead 4 portion thereof onto the printed board 8 together with other small components. When the assembly of the equipment progresses and the printed board 8 is attached to the frame 5, spacers are attached to the bottom surface of the printed board 8 in the shape of four legs, and when placed on the frame 5 surface, the distance from the frame 5 surface is constant and the spacer is horizontal. By moving the printed board 8 horizontally, the top surfaces of the mounting portions 11A, 11A of the terminal block 1 are placed on the back surfaces of the frame mounting portions 5A, 5A, and the top surface of the mounting portion 12A is moved horizontally. The screws 7 are passed through the notches 13 into the respective mounting screw holes 11, 11, 1 so that the surfaces are in contact with the back surfaces of the frame mounting portions 5B, respectively.
2, and frame mounting parts 5A, 5A, 5B.
is clamped between the head of the screw 7 and the terminal block 1 to support and fix the terminal block 1 to the frame 5.

In this way, the terminal block of this embodiment eliminates the need for the conventional work of lifting the printed circuit board and inserting the frame mounting hole into the narrow space behind the terminal block, and allows installation by simply moving horizontally. The attachment portion of the frame can also be formed into a long hole, so that the terminal block can be easily attached to the frame even if the relative position of the frame and the terminal block changes somewhat.

[Effects of the invention] In the terminal block of the present invention, the mounting hole is formed as a female screw into which a male screw can be inserted from the operation surface side for connecting electric wires, or one or more of the mounting holes are printed. It is formed as a female screw that has a lead for electrically connecting with the board and allows a male screw to be inserted from the operating surface side of the electric wire connection. (1) The fixed part with the frame is connected to the terminal Since it is located at the front of the board, there is no need to lift the terminal block part when fixing the printed board to the frame, making assembly easy.

(2) The mounting part of the frame to the terminal block can be made into a long hole instead of a tap hole, so the height of the terminal block to be attached to the printed board can be determined arbitrarily.

(3) Since the frame serves as both mechanical support and electrical ground, there is no need for a frame ground lead wire.

(4) When a frame ground terminal is provided, the number of terminal block fixing points increases, reducing the deflection of the printed board.

(5) Since there is no screw processing (tap processing) on the frame, the number of man-hours is reduced.

Excellent effects such as these can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a terminal block as an embodiment, Fig. 2 is a cross-sectional view of the terminal block of the same embodiment, Fig. 3 is a perspective view of a conventional terminal block, and Fig. 4 is a perspective view of the terminal block of the same embodiment. FIG. 5 is a cross-sectional view showing how the base is installed, and FIG. 5 is a front view showing how the conventional terminal block is installed. 1... Terminal block, 1A... Partition piece, 2... Terminal, 4... Lead, 5... Lower part of the box (frame),
5A, 5B... Frame attachment part, 7... Screw as male screw, 7A... Screw head, 8... Printed board, 9... Upper part of box, 11... Screw hole as mounting hole, 11A... ...Mounting portion, 12...Screw hole with lead as a mounting hole, 12A...Mounting portion, 13...Notch, 14...Spacer.

Claims (1)

[Claims for Utility Model Registration] (1) Provided with a row of screw terminals for connecting electric wires and a plurality of mounting holes to the metal frame, and having a screw terminal attached to the end of the frame mounting portion of a predetermined width extending from the metal frame. In the terminal block to be fixed and supported, the frame has frame mounting parts equal to the number of the mounting holes, longitudinal notches are formed at the ends of the mounting parts, and the mounting holes are connected to each other in the notches. A screw hole into which a screw is inserted is formed in a mounting portion provided on the same side as the terminal, and a lead to be connected to the printed board extends from at least one of the screw holes, and is connected to the head of the screw. A terminal block characterized in that the frame mounting portion is clamped between the terminal blocks and fixed and supported by the frame. (2) The terminal block according to claim 1, wherein the mounting portions are provided at both ends and the center of the terminal block, and the screw hole of the mounting portion in the center portion is a screw hole with a lead.