JP2021184353A - Plug-in terminal structure - Google Patents

Abstract

To suppress a failure caused by not sufficiently securing a contact area with a bus bar.SOLUTION: The present invention relates to a plug-in terminal structure in which a bus bar 8 inserted from an introduction part is connected by contacting a first arm 15 and a second arm 16 of a plug-in terminal. The plug-in terminal comprises: a first contact part 11 which is in contact with the bus bar when the bus bar is inserted; and a second contact part 12 which is positioned deeper than the first contact part in an insertion direction of the bus bar and of which the vertical interval is smaller in a normal state than that of the first contact part. The plug-in terminal structure comprises a regulation part for regulating a vertical spread of the first contact part in a state where the bus bar is inserted in the plug-in terminal.SELECTED DRAWING: Figure 1

Description

The present invention relates to a plug-in terminal structure.

As described in Patent Document 1, the plug-in terminal structure is known. The plug-in terminal structure is used so that the bus bar is sandwiched between elastically deformable plug-in terminals.

Japanese Unexamined Patent Publication No. 2002-199514

By the way, the conventional plug-in terminal is configured to have a substantially C-shape in side view and the ends are bent so as to be separated from each other. In addition, the conventional plug-in terminal has an open end on the introduction part side, and when the bus bar is inserted, the end of the plug-in terminal gradually expands, and when the insertion of the bus bar into the plug-in terminal is completed, it bends. Only the circumference of the part is in contact with the bus bar. Due to this behavior, the contact area between the plug-in terminal and the bus bar is small when the bus bar is inserted into the plug-in terminal. Due to the small contact area, the temperature of the contact portion tends to rise. In addition, since the contact area is small, the bus bar is likely to be scratched by inserting and removing the bus bar.

The inventor of this case tried to solve this problem by diligently examining this point. The problem to be solved by the present invention is to suppress a defect caused by insufficient contact area with the bus bar.

In order to solve the above problem, the bus bar inserted from the introduction part has a plug-in terminal structure connected by contacting the first arm and the second arm of the plug-in terminal, and the plug-in terminal is a plug-in terminal. , The first contact part that contacts the bus bar when the bus bar is inserted is located on the back side of the first contact part with respect to the insertion direction of the bus bar, and is vertically spaced from the first contact part in the normal state. The plug-in terminal structure is provided with a second contact portion having a small size and a restricting portion that regulates the vertical spread of the first contact portion when the bus bar is inserted into the plug-in terminal.

Further, the second contact portion is in the position where the vertical distance between the first arm and the second arm is the shortest in the normal state, and the plug-in terminal when the insertion is completed is from the first contact portion to the second contact portion. It is preferable that the configuration is such that the bus is in contact with the bar.

Further, it is preferable that the vertical spacing of the first contact portion and the vertical spacing of the second contact portion at the time of completion of insertion are substantially the same.

Further, the plug-in terminal is provided with a receiving portion which is located behind the regulation portion in the insertion direction of the bus bar and prevents the regulation member provided with the regulation portion from moving in the insertion direction of the bus bar. Is preferable.

In the present invention, it is possible to suppress a defect caused by the inability to secure a sufficient contact area with the bus bar.

It is a figure which shows the behavior of a plug-in terminal when a bus bar is inserted into a plug-in terminal structure. However, (a) is a state in which the bus bar and the plug-in terminal are not in contact, (b) is a state in which the bus bar and the plug-in terminal are in contact first, and (c) is a state in which the bus bar to the plug-in terminal is in contact. Indicates that the insertion is complete. It is a perspective view which shows the state which the circuit breaker provided with the plug-in terminal structure is connected to the bus bar. It is a side view which shows the state which the circuit breaker provided with the plug-in terminal structure is connected to the bus bar. It is sectional drawing which shows the state which the circuit breaker provided with the plug-in terminal structure is connected to the bus bar. It is a perspective view of a bus bar, a plug-in terminal, and a regulation part. It is a perspective view which shows the state which the bus bar is inserted into the plug-in terminal structure which attached the regulation component to the plug-in terminal.

The embodiment for carrying out the invention is shown below. As can be seen from FIG. 1, in the plug-in terminal structure of the present embodiment, the bus bar 8 inserted from the introduction portion is the first arm 15 and the second arm 15 of the plug-in terminal 10. It is connected by contacting the arm 16. The plug-in terminal 10 having this plug-in terminal structure has "a first contact portion 11 that comes into contact with the bus bar 8 when the bus bar 8 is inserted" and "a first contact portion 11 with respect to the insertion direction of the bus bar 8 rather than the first contact portion 11." The second contact portion 12 "is located on the inner side and has a vertical spacing D2 smaller than the vertical spacing D1 of the first contact portion 11 in a normal state." Further, the plug-in terminal 10 is provided with a regulating portion that regulates the vertical expansion of the first contact portion 11 in a state where the bus bar 8 is inserted. Therefore, it is possible to suppress a problem caused by the inability to secure a sufficient contact area with the bus bar 8.

Hereinafter, an example in which the plug-in terminal structure is provided in the adapter for changing the screw-type breaker into a form that can be connected by a plug-in will be described. As can be understood from FIGS. 1 to 4, the plug-in terminal structure is such that the bus bar 8 is inserted into the recess so that the plug-in terminal 10 can be inserted into the upper surface of the plate-shaped bus bar 8 and the upper surface of the bus bar 8. It is configured so that it can come into contact with the lower surface.

The plug-in terminal 10, which is a component of the plug-in terminal structure of the embodiment, has an opening 13 at the end, which is an introduction portion into which the bus bar 8 is inserted and removed, and is configured to have a substantially U shape when viewed from the side. Has been done. More specifically, it includes an arm support portion 14 extending in the vertical direction, a first arm 15 extending from the upper portion of the arm support portion 14, and a second arm 16 extending from the lower portion of the arm support portion 14. , The side view is configured to have a substantially U shape. When the bus bar 8 is inserted into the plug-in terminal 10 having such a shape, the upper surface of the bus bar 8 comes into contact with the first arm 15, and the lower surface of the bus bar 8 comes into contact with the second arm 16. Become.

This plug-in terminal 10 is located on the back side of the first contact portion 11 and the first contact portion 11 that first come into contact with the bus bar 8 when the bus bar 8 is inserted, and is vertically oriented by inserting the bus bar 8. It includes a second contact portion 12 that can be expanded. Further, a space portion 17 that does not come into contact with the bus bar 8 is provided further back than the second contact portion 12. The first contact portion 11 of the embodiment is a bent portion near the ends of the first arm 15 and the second arm 16 or a position adjacent to the bent portion.

As can be understood from FIG. 4, in a normal state in which the bus bar 8 is not inserted into the plug-in terminal 10, the first arm 15 and the second arm 16 are on the arm support portion 14 side from the end. It is configured to reduce the interval until it reaches a predetermined position toward. In the embodiment, a predetermined position of the first arm 15 and a predetermined position of the second arm 16 constitute the second contact portion 12.

Further, in the embodiment, the configuration from the predetermined position of the first arm 15 to the predetermined position of the second arm 16 is configured to have a side view substantially C shape. It should be noted that the portion having a substantially C shape in the side view constitutes the space portion 17 described above.

As can be seen from FIG. 1, the first arm 15 and the second arm 16 of the plug-in terminal 10 are continuously formed in a substantially flat plate shape between the first contact portion 11 and the second contact portion 12. The vertical width becomes smaller from the first contact portion 11 to the second contact portion 12. In the embodiment, as can be understood from the example shown in FIG. 1, the vertical distance D2 of the second contact portion 12 is the smallest.

Since the plug-in terminal 10 of the embodiment has an open end on the introduction portion side, if it is left as it is, the plug-in terminal 10 is only elastically deformed when the bus bar 8 is inserted, and the contact area is sufficiently increased. Can't. Therefore, in the embodiment, a regulating portion is provided so as to prevent the gap in the vertical direction of the first contact portion 11 of the plug-in terminal 10 from becoming large.

The regulating portion of the embodiment is arranged on the upper side of the first arm 15 and the lower side of the second arm 16 of the plug-in terminal 10. This regulating portion regulates the expansion of the vertical gap of the first contact portion 11 to be smaller than the expansion of the vertical gap of the second contact portion 12. In the embodiment, the restricting portion that is harder to move than the plug-in terminal 10 is arranged so as to be in contact with the vicinity of the first contact portion 11 of the plug-in terminal 10, so that the plug-in terminal 10 near the first contact portion 11 is arranged. Deformation is suppressed. Therefore, by inserting the bus bar 8, the second contact portion 12 is expanded in the vertical direction, and the bus bar 8 and the plug-in terminal 10 come into contact with each other so as to be continuous between the first contact portion 11 and the second contact portion 12. ..

In the embodiment, such a restricting portion is used so that the plug-in terminal 10 at the time of completion of insertion comes into contact with the bus bar 8 from the first contact portion 11 to the second contact portion 12. It is preferable that the first contact portion 11 and the second contact portion 12 are substantially parallel to each other when the insertion is completed, and the distance between the first contact portion 11 and the second contact portion 12 is substantially the same. This is because the contact area between the plug-in terminal 10 and the bus bar 8 can be secured.

However, it is not always necessary for the regulating portion to be in contact with the plug-in terminal 10 in the normal state before the bus bar 8 is inserted, and the bus bar 8 is in contact with the plug-in terminal 10 and the interval in the first contact portion 11 is reached. The regulator may function to suppress further spread after it has spread slightly.

In the embodiment, a wire spring is used as the restricting member 20 in order to provide a restricting portion for sandwiching the plug-in terminal 10 from above and below. By bending the wire spring, the regulating member 20 is configured such that both ends of the wire spring located near the first contact portion 11 of the plug-in terminal 10 are appropriately separated from each other.

In the example restricting member 20 shown in FIGS. 5 and 6, the upper end and the lower end of the base 22 extending in the vertical direction are bent to form a substantially U-shaped portion, and a portion extending horizontally from both ends of the U-shaped portion is provided. It is configured to have a substantially L shape in a plan view. Using the regulating member 20 having such a structure, the plug-in terminal 10 is sandwiched between the upper side 23 and the lower side 24 separated in the vertical direction. At this time, the upper side 23 is arranged so as to be located above the first contact portion 11 of the plug-in terminal 10, and the lower side 24 is arranged so as to be located below the first contact portion 11 of the plug-in terminal 10. It is possible to regulate the spread of the first contact portion 11 in the vertical direction.

By the way, in the plug-in terminal 10 of the embodiment, the arm support portion 14 located in the direction opposite to the opening 13 has a protruding portion 19 extending in the left-right direction. The protruding portion 19 is provided as a receiving portion for suppressing the above-mentioned restricting member 20 from moving in the insertion direction of the bus bar 8. Due to such a configuration, when the base portion 22 of the regulating member 20 is in contact with the protruding portion 19 of the plug-in terminal 10, the regulating member 20 moves from there in the insertion direction of the bus bar 8. Can be suppressed. In this way, the plug-in terminal 10 has a receiving portion that is located behind the regulation portion in the insertion direction of the bus bar 8 and suppresses the regulation member 20 provided with the regulation portion from moving in the insertion direction of the bus bar 8. It is preferable that the configuration is prepared for the above.

Here, the step of inserting the plug-in terminal 10 into the bus bar 8 will be described. First, the plug-in terminal 10 is moved substantially horizontally with respect to the bus bar 8. As a result, when the state (a) of FIG. 1 is changed to the state (b), the bus bar 8 and the plug-in terminal 10 come into contact with each other at the first contact portion 11. When the plug-in terminal 10 in contact with the first contact portion 11 is further pushed forward, the first contact portion 11 is restricted from expanding in the vertical direction by the restricting member 20, and the back side of the first contact portion 11 is expanded in the vertical direction. When the bus bar 8 reaches the second contact portion 12, the bus bar 8 and the plug-in terminal 10 come into contact with each other between the first contact portion 11 and the second contact portion 12. When the insertion is completed, the state shown in FIG. 1 (c) is reached.

When the plug-in terminal 10 is pulled out from the bus bar 8, the expansion in the vertical direction is released from the second contact portion 12 to the first contact portion 11, and the initial state (state (a) in FIG. 1) can be restored. can.

Although the present invention has been described above by taking an embodiment as an example, the present invention is not limited to the above embodiment and can be various modes. For example, the regulating member in the embodiment is formed by using a spring, but may be any as long as it regulates the vertical spread of the first contact portion of the plug-in terminal. For example, a restricting portion (projection or the like) that regulates the vertical expansion of the first contact portion may be integrally formed in the accommodating portion that houses the plug-in terminal.

8 Bus bar 10 Plug-in terminal 11 First contact part 12 Second contact part 15 First arm 16 Second arm D1 Vertical spacing of the first contact part in the normal state D2 Up and down of the second contact part in the normal state Directional spacing

Claims (4)

A plug-in terminal structure in which the bus bar inserted from the introduction portion is connected by contacting the first arm and the second arm of the plug-in terminal.
The plug-in terminal is located on the back side of the first contact part that contacts the bus bar when the bus bar is inserted and the first contact part with respect to the insertion direction of the bus bar, and is located on the back side of the first contact part in the normal state. It has a second contact part with a small vertical spacing, and
A plug-in terminal structure with a regulating part that regulates the vertical expansion of the first contact part when the bus bar is inserted in the plug-in terminal. The second contact portion is normally located at the position where the vertical distance between the first arm and the second arm is the shortest.
The plug-in terminal structure according to claim 1, wherein the plug-in terminal at the time of completion of insertion is in contact with the bus bar from the first contact portion to the second contact portion. The plug-in terminal structure according to claim 1 or 2, wherein the vertical spacing of the first contact portion and the vertical spacing of the second contact portion at the time of completion of insertion are substantially the same. Claims 1 to 3 are provided in the plug-in terminal with a receiving portion that is located behind the regulating portion in the insertion direction of the bus bar and that prevents the regulating member provided with the regulating portion from moving in the insertion direction of the bus bar. The plug-in terminal structure described in any of.

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