JP2537384Y2 - Terminal block - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to, for example, a terminal block which is used by being arranged on a printed circuit board. However, depending on the application, the upper and lower stages are separated and externally connected only to the lower stage. This prevents external connection even if only one stage is short-circuited, and prevents external connection to both upper and lower stages when not short-circuited. It is related to the improvement to make.

[Conventional technology]

9 to 12 show a conventional terminal block, FIG. 9 is a perspective view thereof, FIG. 10 is a plan view thereof, FIG. 11 is a front view thereof, and FIG.
FIG. 12 is a sectional view taken along line XII-XII in FIG.

In the figure, (1) is a printed wiring board on which, for example, a control circuit for controlling a main circuit and electric equipment is provided. (2) is a terminal block main body made of an insulating member such as a synthetic resin material, and has a step-like shape in order to reduce the mounting area of the printed wiring board (1) and the like and to secure an insulating distance.

Reference numeral (3) denotes a screw for fixing a wiring (electric wire), which is provided on both the upper and lower stages of the terminal block body (2). (4)
Is a short-circuiting piece made of a conductive member, which is integrally formed so as to be connectable to the upper and lower steps of the terminal block main body (2).
It is fixed to the terminal block main body (2) by the screw (3). (5) is a lead leg of the terminal block for electrically connecting the terminal block body (2) and the printed wiring board (1), and is integrated so as to be in contact with the short-circuit piece (4) by the screw (3). Is fixed to the terminal block body (2). The other end of the lead foot (5) of the terminal block is connected to the circuit (main circuit, control circuit) of the printed wiring board (1), and the terminal block main body (2) is connected to an upper stage and a lower stage of a two-stage terminal. The circuit is divided, and the upper and lower terminals are short-circuited by short-circuit pieces (4) before use. As described above, the terminal block (6) is formed by the terminal block body (2), the screw (3), the short-circuiting piece (4), and the lead foot (5) of the terminal block.
Is configured.

In the terminal block (6) configured as described above, two circuits of different systems are connected to the upper and lower terminals by printed wiring with two-stage terminals, and the upper and lower two circuits are usually short-circuited (4). ) Is used by short-circuiting, and two circuits (upper and lower) are separated depending on the application, and only one circuit (lower) is supplied with an external signal for use.

[Problems to be solved by the invention]

Since the conventional terminal block (6) is configured as described above, it is necessary to remove the short-circuit piece (4) that short-circuits the two circuits without removing the short-circuit piece (4).
Even if the external circuit is connected to one circuit while the circuit is connected and an external signal is connected, or if the short-circuit piece (4) is removed, for example, when the lower circuit must be connected, the external circuit is mistakenly connected to the upper terminal. For example, there is a problem that the apparatus is damaged.

This invention was made in order to solve the above-mentioned problems.
Another object of the present invention is to provide a highly reliable terminal block in which external connection can be made to only one terminal even when a shorting piece is removed.

[Means for solving the problem]

In the terminal block according to the present invention, first connection preventing means provided near one of the pair of external conductor connecting portions for preventing external connection, and one end avoiding the first connection preventing means. A second cut-off portion connected to the one external conductor connection portion, and the other end having second connection preventing means for preventing external connection, connected to the other external conductor connection portion of the pair of external conductor connection portions. The first connection blocking means and a separable shorting piece.

Also, an insertion-type connecting portion forming one external conductor connecting portion of the pair of external conductor connecting portions, one end is inserted into the insertion-type connecting portion and connected to the one external conductor connecting portion, and the other end is a screw. And a short-circuit piece that is separable from the insertion-type connection part connected to the other external conductor connection part of the pair of external conductor connection parts.

[Action]

In the terminal block according to the present invention, first connection preventing means provided near one of the pair of external conductor connecting portions for preventing external connection, and one end avoiding the first connection preventing means. A second cut-off portion connected to the one external conductor connection portion, and the other end having second connection preventing means for preventing external connection, connected to the other external conductor connection portion of the pair of external conductor connection portions. The first connection blocking means and a separable short-circuit piece prevent external connection to any of the pair of external conductor connection parts when the short-circuit piece is mounted, and a pair of the external conductor connection parts when the short-circuit piece is not mounted. External connection is enabled only to the other external conductor connection part of the external conductor connection part.

Also, an insertion-type connecting portion forming one external conductor connecting portion of the pair of external conductor connecting portions, one end is inserted into the insertion-type connecting portion and connected to the one external conductor connecting portion, and the other end is a screw. The screw connection preventing means for preventing external connection by the insertion type connecting portion connected to the other external conductor connecting portion of the pair of external conductor connecting portions and the separable shorting portion. At the time of mounting, external connection by a screw is prevented at any of the pair of external conductor connection portions, and when the shorting piece is not mounted, external connection by the screw is enabled only at the other external conductor connection portion of the pair of external conductor connection portions. Will be.

[Example of the invention]

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 4, (1) is a printed circuit board on which a control circuit for controlling, for example, a main circuit and an electric device is arranged, and (2) is a terminal block made of an insulating member such as a synthetic resin material. The main body is disposed on the printed wiring board (1). The terminal block main body (2) has an upper step and a lower step in order to reduce a mounting area and secure an insulation distance. Further, on the upper stage of the terminal block main body (2), a barrier-shaped projection (2a) serving as first connection preventing means for preventing external connection is provided integrally with the terminal block main body (2). . (3) is a screw for fixing the wiring (electric wire), which is provided on both the upper and lower stages of the terminal block body (2).

(5) lead legs of the terminal block for electrically connecting the terminal block body (2) and the printed wiring board (1);
(7) is a short-circuiting piece made of a conductive member, which is integrally formed so as to be able to be coupled to the stepped upper and lower steps of the terminal block main body (2), and comes into contact with the lead foot (5) and a terminal by a screw (3). It is simultaneously fixed to the base body (2). Further, a cutout (11) for avoiding the projection (2a) is provided on the upper side of the shorting piece (7), and a cutout (11) is provided on the lower side of the shorting piece (7) for preventing external connection. A barrier (7a) serving as a connection preventing means is formed integrally with the shorting piece (7).

The other end of the lead foot (5) of the terminal block (2) is connected to the circuit (main circuit, control circuit) of the printed wiring board (1), and is connected to the upper stage of the two-stage terminal of the terminal block body (2). The circuit is divided into the lower stage and the upper and lower terminals are short-circuited by short-circuit pieces (7) before use. Then, the terminal block (8) is constituted by the terminal block main body (2), the screw (3), the lead foot (5) of the terminal block, and the shorting piece (7).

The terminal block (8) configured as described above has an external conductor connection portion (9) including upper and lower screws (3) printed in two stages and two circuits of another system printed on the upper and lower terminals. They are connected by wiring, and are usually used by short-circuiting the upper and lower two circuits with a shorting piece (7). At this time, the external connection is prevented by the projection (2a) on the upper stage and the barrier (7a) integrally formed on the short-circuiting piece (7) on the lower stage so that connection from the outside cannot be made because of the short-circuit state.

On the other hand, two circuits (upper stage and lower stage) are separated depending on the application, and a signal is externally supplied to one circuit (in this case, only the lower stage) and used. In this case, the shorting piece (7) is connected to the terminal block body (2).
To make it non-short-circuited. In this case, the protrusion (2a) hinders the upper outer conductor connection portion (9),
External connections are blocked.

External connection to the lower external conductor connection portion (9) has nothing to prevent the connection, so that external connection can be made to the lower stage.

In the above embodiment, as a means for preventing external connection to the external conductor connection portion (9), the protrusion (2a) is described as being integrally formed with the terminal block body (2). Other means may be used as long as they can be prevented. FIGS. 5 to 8 show an embodiment of the second invention, in which reference numeral 10 denotes a flat connection terminal having a terminal shape that does not allow external wiring by screw connection. Therefore, when short-circuiting using the short-circuit piece (7), external wiring by screw connection cannot be made to any terminal, and plug-in connection is possible only to the upper terminal. Further, when the short-circuit piece (7) is not short-circuited, only the lower terminal can be connected to the screw from the outside, and only the upper terminal can be inserted from the outside.

Further, in the above-described embodiment, the connection can be made to the lower external conductor connection portion (9) at the time of non-short circuit. However, the connection can be made to the upper stage and the lower stage cannot be connected.

[Effect of the invention]

As described above, according to the present invention, the first connection blocking means is provided near one of the pair of external conductor connection sections to block external connection, and the first connection blocking means is provided at one end. A second connection preventing means connected to the one external conductor connecting part and having the other end for preventing external connection, the other external conductor connecting part of the pair of external conductor connecting parts The first connection blocking means and the detachable short-circuit piece are connected to each other, so that external connection is prevented at any of the pair of external conductor connection portions when the short-circuit piece is mounted, and when the short-circuit piece is not mounted. The external connection can be made only to the other external conductor connection portion of the pair of external conductor connection portions, so that damage to the device due to erroneous wiring can be prevented, and a highly reliable terminal block can be obtained.

Also, an insertion-type connecting portion forming one external conductor connecting portion of the pair of external conductor connecting portions, one end is inserted into the insertion-type connecting portion and connected to the one external conductor connecting portion, and the other end is a screw. The screw connection preventing means for preventing external connection by the insertion type connecting portion connected to the other external conductor connecting portion of the pair of external conductor connecting portions and the separable shorting portion. At the time of mounting, external connection by a screw is prevented at any of the pair of external conductor connection portions, and when the shorting piece is not mounted, external connection by the screw is enabled only at the other external conductor connection portion of the pair of external conductor connection portions. As a result, in the external connection wiring using screws, there is an effect that damage to the device due to incorrect wiring can be prevented, and a highly reliable terminal block can be obtained.

[Brief description of the drawings]

1 to 4 show a terminal block according to an embodiment of the present invention. FIG. 1 is a perspective view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 5 to 8 show a terminal block according to another embodiment of the present invention, FIG. 5 is a perspective view thereof, FIG. 6 is a plan view thereof, and FIG.
FIG. 8 is a front view, FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 7, FIGS. 9 to 12 show a conventional terminal block, FIG. 9 is a perspective view thereof, and FIG. FIG. 11 is a plan view, FIG. 11 is a front view thereof, and FIG. 12 is a sectional view taken along line XII-XII of FIG. In the figure, (2) is a terminal block main body, (2a) is a first connection preventing means (projection), (7) is a short-circuiting piece, (7a) is a second connection preventing means (barrier), (9) Is the external conductor connection,
(10) is a flat connection terminal, and (11) is a notch. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

(57) [Scope of request for utility model registration] 1. A terminal block comprising a pair of external conductor connecting portions having steps and connected to different circuits, and a detachable short-circuit piece for short-circuiting between the pair of external conductor connecting portions. A first connection preventing means provided near one of the pair of external conductor connecting portions for preventing external connection, and a notch having one end for avoiding the first connection preventing means; The first connection is connected to one external conductor connection part, and the other end has second connection prevention means for preventing external connection, and is connected to the other external conductor connection part of the pair of external conductor connection parts. A terminal block comprising a blocking means and a separable shorting piece. 2. A terminal block comprising: a pair of external conductor connecting portions each having a step and connected to a circuit of a different system; and a detachable short-circuit piece for short-circuiting between the pair of external conductor connecting portions. An insertion-type connecting portion forming one of the pair of external-conductor connecting portions, and one end inserted into the inserting-type connecting portion and connected to the one external-conductor connecting portion, and the other end being a screw. And a short-circuit piece separable from the insertion-type connection part connected to the other external conductor connection part of the pair of external conductor connection parts. And the terminal block.