JP6858639B2 - Plug-in terminal device and switch - Google Patents

Description

The present invention relates to a plug-in terminal device used in a switch including a circuit breaker such as a circuit breaker for wiring and an earth leakage breaker, and a switch using a plug-in terminal device.

Conventionally, a plug-in terminal device that is attached to a structure such as a switchboard and to which an external conductor is connected can be attached to and detached from a switch for easy replacement and inspection. The plug terminal device of such a switch includes a clip terminal having a pair of pressure contact pieces mounted on the switch and facing each other, and a blade of a blade terminal provided in the plug terminal device by the pressure contact force of the pair of pressure contact pieces. By sandwiching the portion, the switch is attached to the plug-in terminal device, and the external conductor connected to the plug-in terminal device is electrically connected to the switch. (See, for example, Patent Document 1 or Patent Document 2)

Japanese Unexamined Patent Publication No. 2009-266552 Japanese Unexamined Patent Publication No. 2010-287423

In the conventional plug-in terminal device as described above, the pressure contact pieces of the opposing clip terminals hold the blade portion of the blade terminal narrowly and come into contact with each other by the pressure contact force to electrically connect the clip terminal and the blade portion. However, when a large current such as a short-circuit current flows, it is split by the pressure contact pieces of the opposite clip terminals, and when the current flows in parallel and in the same direction, the force that spreads between the two pressure contact pieces due to the electromagnetic repulsive force is applied. appear. When the electromagnetic repulsive force exceeds the pressure welding force and a gap is generated between the pressure welding piece of the clip terminal and the blade part of the blade terminal, an arc is generated due to the potential difference between the clip terminal and the blade terminal, and the contact surface becomes rough. It causes welding. At present, as a countermeasure, the pressure contact force of the pressure contact piece of the clip terminal is increased, and the insertion / removal load when connecting the clip terminal and the blade terminal becomes high, which reduces the workability in the switch installation work. There was a problem of inviting.

The present invention has been made to solve the above problems, and is used between the pressure contact piece of the clip terminal and the blade portion of the blade terminal when a large current flows without increasing the pressure contact force of the clip terminal. It is an object of the present invention to provide a plug-in terminal device capable of suppressing an arc generated in an electric current.

The plug-in terminal device according to the present invention includes a clip terminal having two pressure contact pieces that oppose each other, and a blade terminal having a blade portion that is connected to the two pressure contact pieces of the clip terminal by pressure welding. In the terminal , the central portion on one end side of the strip-shaped conductor plate forms a stopper portion, and both side portions on one end side of the conductor plate are separated from the stopper portion to form a fitting piece, and other than the conductor plate. The central portion on the end side forms the blade portion, both side portions on the other end side of the conductor plate are cut out to form a fitting portion, and the conductor plate is bent into a U shape to form the conductor plate. One end side and the other end side of the conductor plate extend vertically and parallel to the bottom of the U-shape, and the fitting piece on one end side of the conductor plate is bent and fitted into the fitting portion to form a box. A shape-shaped portion is formed, and the blade portion is bent from the fitting portion on the other end side of the conductor plate and separated from the stopper portion at the central portion on one end side of the conductor plate at the central portion of the box-shaped portion. When a short-circuit current is generated between the pair of the pressure-welded pieces of the clip terminals and the pressure-welded pieces are separated from the blade portion, the pressure-welded pieces are placed on one end side of the conductor plate. it is intended to be in contact with the stopper portion.
Further, the insertion terminal device according to the present invention includes a clip terminal having two pressure contact pieces that oppose each other and a blade terminal having a blade portion that is connected to the two pressure contact pieces of the clip terminal by pressure welding. In the blade terminal , the central portion on one end side of the strip-shaped conductor plate forms one side blade portion of the blade portion, and both side portions on one end side of the conductor plate are separated from the one side blade portion and fitted. A piece is formed, the central portion on the other end side of the conductor plate forms the other side blade portion of the blade portion, and both side portions on the other end side of the conductor plate are cut out to form a fitting portion. The conductor plate is bent into a U shape, and the one-sided blade portion on one end side of the conductor plate and the other-side blade portion on the other end side of the conductor plate extend vertically and parallel to the bottom of the U-shape. The fitting piece on one end side of the conductor plate is bent and fitted into the fitting portion to form a box-shaped portion , and the pair of pressure contact pieces of the clip terminal are paired on one side of the above. It is disposed between the blade portion and the other-side blade portion, a pair of the pressing member of said clip pin and said one side blade section by pressure contact force to the pair of the first side blade portion and the other-side blade portion It is pressure-welded to the other blade portion.

According to the present invention, a clip terminal having two pressure contact pieces opposed to each other and a blade terminal having a blade portion connected to the two pressure contact pieces of the clip terminal by pressure contact are provided, and the blade terminal is provided with the above-mentioned blade terminal. Since a locking portion is formed to receive the force that spreads between the two pressure contact pieces of the clip terminal, the pressure contact piece and blade of the clip terminal when a large current flows without increasing the pressure contact force of the clip terminal. There is an effect that a plug-in terminal device capable of suppressing an arc generated between the terminal blade portion and the terminal can be obtained.

It is a perspective view which shows the state before coupling of a switch and a plug-in terminal device in Embodiment 1 of this invention. It is a perspective view which shows the clip terminal, the blade terminal and the holding plate of the insertion terminal device in Embodiment 1 of this invention. It is a perspective view which shows the blade terminal of the plug-in terminal device in Embodiment 1 of this invention. It is a side view which shows the blade terminal of the plug-in terminal device in Embodiment 1 of this invention in a partial cross section. It is a side view which shows the state which connected the clip terminal and the blade terminal of the insertion terminal device in Embodiment 1 of this invention. It is a side view which shows the case where a large current flows in the state which connected the clip terminal and the blade terminal of the insertion terminal device in Embodiment 1 of this invention. It is a perspective view which shows the clip terminal, the blade terminal, and the holding plate of the insertion terminal device in Embodiment 2 of this invention. It is a perspective view which shows the blade terminal of the insertion terminal device in Embodiment 2 of this invention. It is a side view which shows the state which connected the clip terminal and the blade terminal of the insertion terminal device in Embodiment 2 of this invention.

Hereinafter, embodiments of the present invention will be described, but the same or corresponding parts will be described with the same reference numerals in the drawings.
Embodiment 1.
FIG. 1 is a perspective view showing a state before coupling of the switch main body and the plug-in terminal device according to the first embodiment of the present invention, and FIG. 2 is a clip terminal, a blade terminal, and a presser foot of the plug-in terminal device according to the first embodiment of the present invention. A perspective view showing a plate, FIG. 3a is a perspective view showing a blade terminal of the plug-in terminal device according to the first embodiment of the present invention, and FIG. 3b is a partial cross-sectional view of the blade terminal of the plug-in terminal device according to the first embodiment of the present invention. 4a is a side view showing a state in which the clip terminal and the blade terminal of the plug terminal device according to the first embodiment of the present invention are coupled, and FIG. 4b is a side view showing the clip terminal of the plug terminal device according to the first embodiment of the present invention. It is a side view which shows the case where a large current flows with the blade terminal connected with.

In FIG. 1, the switch 1 that opens and closes an electric circuit is a circuit breaker such as a wiring breaker or an earth leakage breaker. The appearance of the switch 1 is formed by an insulating housing 6 including a housing-shaped cover 6a formed of an insulating resin and a frame-shaped base 6b. Further, by rotating the handle 7 protruding from a part of the cover 6a to the right or left in FIG. 1, the power supply side terminal 8a and the load side terminal 8b of the switch 1 become conductive or non-conducting. Become. Since the right side of FIG. 1 is the power supply side and the left side is the load side, the position of the handle 7 shown in FIG. 1 is on the power supply side, so that the switch 1 is in a conductive state. A clip terminal 3 is connected to each of the power supply side terminal 8a and the load side terminal 8b so that the clip terminal 3 can be electrically connected to the power supply side terminal 8a or the load side terminal 8b.

The plug-in terminal device 2 fixed in advance to a structure such as a switchboard has an appearance formed of an insulating resin, and has a base 2a fixed to a panel or angle of a switchboard or the like (not shown) and three locations on both sides thereof. A total of 6 terminal portions 2b are provided. A blade terminal 4 is fixed to each of the terminal portions 2b at a position facing each of the clip terminals 3 of the switch 1. The switch 1 and the plug terminal device 2 can be attached by connecting the clip terminals 3 and the blade terminals 4 facing them, respectively.

Next, the details of the structure of the clip terminal 3 and the blade terminal 4 will be described with reference to FIG. In FIG. 2, the clip terminal 3 is made of conductive metal, has a connection portion 3b electrically connected to the power supply side terminal 8a and the load side terminal 8b of the switch 1, and the opposite end thereof is plate-shaped. The two pressure contact pieces 3a are capable of sandwiching the two pieces, and form a substantially U-shape as a whole. A plate-shaped object can be sandwiched between the two pressure contact pieces 3a by the pressure contact force.

The blade terminal 4 is formed by bending a strip-shaped conductive metal to form a box-shaped box-shaped portion, and further, a blade portion 4a in which one end of the strip-shaped material continuous from the box-shaped portion is vertically erected. The stopper portion 4b has a stopper portion 4b whose other end is raised substantially parallel to the blade portion 4a, and the stopper portion 4b forms a locking portion that receives a force that spreads between the two pressure contact pieces 3a of the clip terminal 3. Is. As for the positional relationship, the box-shaped portion is arranged on the opposite side of the clip terminal 3 with the blade portion 4a interposed therebetween. The presser plate 5 for suppressing the blade terminal 4 from popping out is provided with a through hole for projecting the blade portion 4a and a notch for projecting the stopper portion 4b, and the blade portion 4a fills the through hole. penetrating, vinegar topper portion 4b extends through the notch.

Details of the blade terminal 4 will be described with reference to FIGS. 3a and 3b. The blade terminal 4 has a blade portion 4a sandwiched between the pressure contact pieces 3a of the opposing clip terminals 3, a box-shaped shape is formed so as to support the blade portion 4a, and the box-shaped blade portion 4a is formed. On the opposite side to the side, there is a connecting portion 4c provided with a female screw for connecting an external conductor (not shown), and these are formed by bending a series of strip-shaped conductor plates. One end of the strip-shaped conductor plate forms a blade portion 4a, the opposite end supports the blade portion 4a from below, and the end particularly forms a fitting piece 4d, and both sides of the box shape. It is fitted to the fitting portions 4e provided at two locations on the surface. The female screw of the connecting portion 4c may be directly processed on the conductor plate or may be provided by attaching a nut at the position of the conductor plate having a hole.

The blade terminal 4 forms a box shape by bending a series of strip-shaped conductor plates in the inner peripheral direction at the bent portions 4f, 4g, 4h and 4i. The tip on the fitting piece 4d side is divided into three pieces, and when the bent portion 4f is bent, only the fitting pieces 4d at both ends are bent to form the stopper portion 4b. Further, the bent portion 4j is bent in the outer peripheral direction, and one end of the strip-shaped conductor plate is raised substantially vertically from the box-shaped portion formed by the bent portions 4f, 4g, 4h and 4i, and the blade portion 4a is formed. Is forming. The bent portions 4f, 4g, 4h, 4i and 4j may be easily bent by using a material having a lower rigidity than the other portions of the blade terminal 4.

Next, the operation will be described with reference to FIGS. 4a and 4b. In the state where the switch 1 is attached to the insertion terminal device 2, as shown in FIG. 4a, the blade portion 4a of the blade terminal 4 is inserted between the two pressure contact pieces 3a of the clip terminals 3 facing each other. The blade portion 4a is sandwiched and electrically connected by the pressure contact force of the two pressure contact pieces 3a.

In this state, when a large current such as a short-circuit current flows between the clip terminal 3 and the blade terminal 4, the large current is diverted by the two pressure contact pieces 3a facing each other of the clip terminal 3 and is parallel and in the same direction. An electromagnetic repulsive force larger than the pressure contact force is generated between the two pressure contact pieces 3a facing each other, and the space between the pressure contact pieces 3a of the clip terminal 3 is widened as shown in FIG. 4b. , A gap is generated between the blade portion 4a and the pressure contact piece 3a, but the expanded pressure contact piece 3a abuts on the stopper portion 4b provided on the blade terminal 4 and is electrically connected to the clip terminal 3. The blade terminals 4 have the same potential, and it is possible to suppress an arc generated in the gap between the blade portion 4a and the pressure contact piece 3a.

As described above, since the blade terminal 4 is formed with a stopper portion 4b as a locking portion for receiving a force for expanding the space between the pressure contact pieces 3a of the clip terminal 3, the pressure contact force of the pressure contact piece 3a of the clip terminal 3 is formed. By lowering the value, the insertion / extraction load in the switch installation work can be reduced, so that it is possible to reduce the deterioration of workability, and a large current such as a short-circuit current flows, and the electromagnetic repulsive force is applied to the pressure contact piece 3a. Even if the pressure contact force becomes larger than the pressure contact force and the space between the two pressure contact pieces 3a that face each other expands and a gap is created between the pressure contact piece 3a and the blade portion 4a, the pressure contact piece 3a abuts on the stopper portion 4b and the blade portion 4a and the pressure contact piece 3a It is possible to obtain a plug-in terminal device capable of suppressing an arc generated in a gap between the two.

Further, since the blade terminal 4 is formed in a box shape by bending a strip-shaped conductor plate and the fitting piece 4d is fitted to the fitting portion 4e, it is easy to assemble and inexpensive, and it can be opened and closed. The blade terminal 4 can be made sufficiently strong against the load applied to the blade portion 4a during the device mounting work.

Embodiment 2.
FIG. 5 is a perspective view showing a clip terminal, a blade terminal, and a holding plate of the plug-in terminal device according to the second embodiment of the present invention, and FIG. 6 is a perspective view showing a blade terminal of the plug-in terminal device according to the second embodiment of the present invention. FIG. 7 is a side view showing a state in which the clip terminal and the blade terminal of the insertion terminal device according to the second embodiment of the present invention are connected.
In the first embodiment, the case where the locking portion formed in the blade terminal 4 for receiving the force spreading between the pressure contact pieces 3a of the clip terminal 3 is the stopper portion 4b has been described, but in the second embodiment, the blade terminal 4 A case will be described in which the locking portion is the two blade portions 4a in which the two pressure contact pieces 3a of the clip terminal 3 are pressure contacted from the inner direction.

In FIGS. 5 and 6, the blade terminal 4 is formed by bending a strip-shaped conductive metal to form a box-shaped box-shaped portion, and both ends of the strip-shaped material continuous from the box-shaped portion are formed. It has two vertically erected blade portions 4a, and the two blade portions 4a form a locking portion that receives a force that spreads between the two pressure contact pieces 3a of the clip terminal 3. As for the positional relationship, the box-shaped portion is arranged on the opposite side of the clip terminal 3 with the blade portion 4a interposed therebetween. Incidentally, the pressing plate 5 for pressing from the blade terminal 4 pops out, the notches provided for protruding the two blade portions 4a, the blade portion 4a of the notch of that penetrates. The two pressure contact pieces 3a of the clip terminal 3 are connected by pressure contact force from the inner direction of each of the two blade portions 4a of the blade terminal 4.

Next, the operation will be described with reference to FIG. In a state where the switch 1 is attached to the insertion terminal device 2, as shown in FIG. 7, two pressure contact pieces 3a facing each other of the clip terminals 3 are inserted inside the blade portions 4a of the blade terminals 4. The pressure contact piece 3a and the blade portion 4a are electrically connected by the pressure contact force of each pressure contact piece 3a.

In this state, when a large current such as a short-circuit current flows between the clip terminal 3 and the blade terminal 4, the large current is diverted by the two pressure contact pieces 3a facing each other of the clip terminal 3 and is parallel and in the same direction. An electric current flows through the clip terminal 3a, and an electromagnetic repulsive force is generated between the two opposing pressure contact pieces 3a. In this case, the electromagnetic repulsive force is in the same direction as the pressure contact force of the pressure contact piece 3a of the clip terminal 3. The pressure contact piece 3a is strongly pressed by the blade portion 4a of the blade terminal 4, and no void is generated, so that no arc is generated. Therefore, it is possible to reduce the pressure contact force by the pressure contact piece 3a, and it is possible to reduce the insertion / removal load in the switch mounting work, so that it is possible to reduce the deterioration of workability.
Further, in the second embodiment, it is possible to obtain the blade terminal 4 which has a simpler structure and is easier to manufacture than the one of the first embodiment.
Since the other parts are the same as those in the first embodiment, the description thereof will be omitted.

It should be noted that the present invention can be freely combined with the embodiments within the scope of the invention, and the embodiments can be appropriately modified or omitted, and the present invention is not limited by the above-described embodiments. Absent.

1 switch, 2 plug-in terminal device, 2a base, 2b terminal, 3 clip terminal, 3a pressure welding piece, 3b connection, 4 blade terminal, 4a blade, 4b stopper, 4c connection, 5 presser plate, 6 insulation Housing, 6a cover, 6b base, 7 handles, 8a power supply side terminal, 8b load side terminal

Claims (4)

It is provided with a clip terminal having two pressure contact pieces that oppose each other and a blade terminal having a blade portion connected to the two pressure contact pieces of the clip terminal by pressure welding, and the blade terminal is a strip-shaped conductor plate . The central portion on one end side forms a stopper portion, both side portions on one end side of the conductor plate are separated from the stopper portion to form a fitting piece, and the central portion on the other end side of the conductor plate is the blade portion. , Both sides of the other end side of the conductor plate are cut out to form a fitting portion, and the conductor plate is bent into a U shape to form one end side of the conductor plate and the other end of the conductor plate. The side extends vertically and parallel from the bottom of the U-shape, and the fitting piece on one end side of the conductor plate is bent and fitted into the fitting portion to form a box-shaped portion, and the blade is formed. The portion is formed by being bent from the fitting portion on the other end side of the conductor plate and bent in parallel with the stopper portion at the central portion on one end side of the conductor plate at the central portion of the box-shaped portion. When a short-circuit current is generated between the pair of pressure-welded pieces of the clip terminals and the pressure-welded pieces are separated from the blade portion, the pressure-welded pieces are brought into contact with the stopper portion on one end side of the conductor plate. Plug-in terminal device featuring and. A clip terminal having two pressure contact pieces that oppose each other and a blade terminal having a blade portion connected to the two pressure contact pieces of the clip terminal by pressure welding are provided, and the blade terminal is a strip-shaped conductor plate . The central portion on one end side forms one side blade portion of the blade portion, and both side portions on one end side of the conductor plate are separated from the one side blade portion to form a fitting piece, and the other end of the conductor plate. The central portion on the side forms the other side blade portion of the blade portion, both side portions on the other end side of the conductor plate are cut out to form a fitting portion, and the conductor plate is bent into a U shape. The one-sided blade portion on one end side of the conductor plate and the other-side blade portion on the other end side of the conductor plate extend vertically in parallel from the bottom of the U-shape, and the one end side of the conductor plate is described above. The fitting piece is bent and fitted into the fitting portion to form a box-shaped portion , and the pair of the pressure contact pieces of the clip terminals are between the pair of the one-side blade portions and the other-side blade portion. disposed, that a pair of the pressing member of the clip terminal that is pressed against the said one side blade portion and the other-side blade portion by pressure contact force to the pair of the first side blade portion and the other-side blade portion A plug-in terminal device that features. The blade terminal, the U-shaped insertion terminal according to claim 1 or claim 2, characterized in that the connection portion to be connected by the external conductor and the female screw is provided at the bottom of the. A switch comprising the plug-in terminal device according to any one of claims 1 to 3.

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