JP2011124098A - Connector for direct current distribution - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety-improved connector for direct current distribution which does not discharge arc to the outside and can prevent a reverse insertion of plug blade of a plug into a connection part of a receptacle. <P>SOLUTION: A plug 11 to be used in an DC driven electric unit has a pair of plug blades 12a, 12b of different lengths and each of the plug blades 12a, 12b of the plug 11 are inserted into insertion holes 14a, 14b of a receptacle 13 and are connected with a pair of connection parts 15a, 15b arranged inside the insertion holes 14a, 14b of the receptacle. The pair of the connection parts 15a, 15b are arranged so that, when each of the plug blades 12a, 12b of the plug 11 are inserted into the insertion hole 14a, 14b, the short blade 12b may be electrically connected earlier than the long blade 12a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a DC distribution connector comprising a plug and outlet for DC distribution.

  In general, a connection device including a plug and an outlet is used as a connection device for AC distribution. The plug is provided with a pair of plug blades used for electrical equipment, and the outlet is provided with a pair of connection portions to which the plug blades are electrically connected.

  On the other hand, in the case of direct current distribution, there is no timing of 0 V, so an arc is generated when the connection device is closed. Therefore, when using a plug and an outlet that are connection devices for AC power distribution, a mechanism for suppressing the generation of an arc is provided (see, for example, Patent Document 1).

  In addition, there is a configuration in which generation of an arc is allowed, and an arc caused by a direct current can be prevented from occurring at both of the pair of connection terminals provided in the plug (for example, see Patent Document 2). In other words, the protruding length from the plug is made different between one and the other of the pair of connection terminals of the plug, the timing of separation from the connection part of the outlet is made different, and the situation that occurs in both the pair of connection terminals is prevented is doing.

JP 2009-146783 A JP 2009-146777 A

  However, in the thing of patent document 1, the mechanism which suppresses generation | occurrence | production of an arc is needed, and an apparatus structure becomes complicated. Moreover, in the thing of patent document 2, although the situation which arises in both of a pair of connecting terminals can be prevented, the arc generated between the connecting terminal of the plug and the connecting part of the outlet can be discharged to the outside of the connecting device. There is not enough safety.

  Also, in the case of DC power distribution, if the polarity of positive and negative is reversed, electrical equipment will be damaged, so it is necessary to insert the plug connection terminal into the outlet without error. However, the countermeasure is not applied to the one of Patent Document 2.

  An object of the present invention is to provide a DC power distribution connector that does not discharge an arc to the outside and prevents the plug blade of the plug from being reversely inserted into the connection portion of the outlet, thereby improving safety. is there.

  A DC power distribution connector according to a first aspect of the present invention is a plug having a pair of plug blades of different lengths used in DC-driven electric equipment; an insertion hole into which each plug blade of the plug is inserted An outlet having an outlet; provided inside the insertion hole of the outlet, and arranged such that when each plug blade of the plug is inserted into the insertion hole, the short plug blade is electrically connected before the long plug blade And a pair of connection portions.

  In the present invention and the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.

  The DC-driven electric device refers to an electric device that operates with a DC power source. The plug blade is, for example, a copper alloy plate-like blade that is inserted into an outlet in the plug, and is provided so as to protrude from the plug. Further, a pair of plug blades having different lengths means that the lengths of the two plug blades provided corresponding to the positive and negative polarities of the direct current are different in the insertion direction into the outlet.

  The insertion hole into which each plug blade of the plug is inserted refers to a hole for guiding the plug blade of the plug to a connecting portion provided inside the insertion hole of the outlet.

  A pair of connection parts refers to an electrical member that is provided corresponding to a pair of plug blades and is electrically connected to the plug blades. Also, “When each plug blade is inserted into the insertion hole, the short plug blade is electrically connected before the long plug blade” means that when each plug blade is inserted into the insertion hole of the outlet, When the blade first reaches the contact part of the outlet and comes into contact with it, it means that the long plug blade has not reached the connection part of the outlet and is in a non-contact state. This means that the long blade comes into contact with the outlet connection when the is inserted into the insertion hole.

  According to a second aspect of the present invention, there is provided a DC power distribution connector according to the first aspect, wherein the pair of plug blades have different shapes from each other, and the long plug blade is connected to the connecting portion rather than the short plug blade. The bonding area is large, and the tip part has a sharp part.

  “The pair of plug blades have different shapes” means, for example, shapes having different vertical cross-sectional shapes with respect to the insertion direction into the outlet. Along with this, the shape of the insertion hole of the outlet becomes a different shape. For example, the vertical cross-sectional shape with respect to the insertion direction of one plug blade into the outlet is a vertically long rectangle, and the vertical cross-sectional shape with respect to the insertion direction of the other plug blade into the outlet is a horizontally long rectangle or arc shape. Thereby, reverse insertion of the plug blade can be prevented.

  “A shape with a large joint area with the connecting portion” means a shape in which the area where the plug blade is joined with the connecting portion is large. If the width is the same, the arc shape is used instead of the planar shape. Thereby, the current capacity of the junction with the connection is ensured. Moreover, a sharp part means the arc generation | occurrence | production point formed in the front-end | tip part of a plug blade. Since arcs are concentrated on sharp points, maintenance of arc countermeasures is easy to perform.

  According to a third aspect of the present invention, there is provided the DC power distribution connector according to the first or second aspect, wherein the long plug blade has a polarity to be connected to the cathode of the outlet.

  The cathode of the outlet means a pole in a direction in which a direct current returns from the electrical device to the connection portion of the outlet. Therefore, an arc (electron) flows from the cathode side of the outlet toward the long plug blade side.

  According to the invention of claim 1, since the pair of connecting portions are arranged so that the short plug blade is electrically connected before the long plug blade when each plug blade of the plug is inserted into the insertion hole, An arc will occur between the outlet connection and the long blade. Therefore, even when an arc is generated, an arc is generated inside the outlet insertion hole, which is located away from the plug blade insertion portion, so that the arc can be prevented from being discharged to the outside. Safety is improved. Further, since the lengths of the plug blades are different, even when the plug is reversely inserted into the outlet, the short plug blade and the connecting portion of the outlet cannot be joined, so that the polarity is not reversed and the current is not supplied. Furthermore, since the pole where the arc is generated can be limited to the long plug blade side, the arc-resistant structure can be only the long plug blade which is one of the poles, and the life due to deterioration can be extended.

  According to the invention of claim 2, since the pair of plug blades have different shapes, it is possible to prevent the plug from being reversely inserted into the outlet. In addition, a long blade that generates an arc secures a current capacity as a shape with a larger joining area with the connection than a short blade, and a point where an arc is generated by a sharp portion is specified as an end. Easily take measures against arcs.

  According to the invention of claim 3, since the long plug blade where the arc is generated has a polarity connected to the cathode of the outlet, the arc flows from the cathode side of the outlet toward the long plug blade. As a result, the plug blade that is longer than the connection portion of the outlet is more easily affected by the arc, and maintenance by the arc becomes easier.

Explanatory drawing of an example of the connector for DC distribution which concerns on embodiment of this invention. Explanatory drawing of the connection process which connects the plug of the connector for DC distribution shown in FIG. 1 to an outlet. Explanatory drawing of another example of the connector for direct current distribution which concerns on embodiment of this invention. The top view of an example of the insertion hole of the outlet for preventing the reverse insertion of the plug to the outlet in the embodiment of the present invention. The top view of an example of the recessed part of an outlet socket for the reverse insertion prevention to the outlet socket of the plug in embodiment of this invention.

  Embodiments of the present invention will be described below. FIG. 1 is an explanatory diagram of an example of a DC distribution connector according to an embodiment of the present invention, and FIG. 1A is a perspective view of a plug of an example of a DC distribution connector according to an embodiment of the present invention. FIG.1 (b) is a top view of the outlet of an example of the connector for DC power distribution which concerns on embodiment of this invention.

  In FIG. 1A, a plug 11 is a plug for direct current distribution used for an electric device driven by direct current, and is provided with a pair of plug blades 12a and 12b having different lengths. That is, a long plug blade 12 a and a short plug blade 12 b are provided to protrude from the front surface of the plug 11. A pair of plug blades 12 of a long plug blade 12a and a short plug blade 12b are inserted into the insertion holes 14a and 14b of the outlet 13 shown in FIG. 1B, and are provided inside the insertion holes 14a and 14b of the outlet 13. Connected to the connected part.

  2 is an explanatory diagram of a connection process for connecting the plug 11 of the DC distribution connector shown in FIG. 1 to the outlet 13, and FIG. 2A is a side view showing a state before the plug 11 is inserted. 2 (b) is a side view showing a state where the short plug blade of the plug 11 is in contact with the connection portion of the outlet 13, and FIG. 2 (c) is a diagram showing both plug blades 14a, 14b of the plug 11 being the respective connection portions of the outlet 13. It is a side view which shows the state which contacted.

  In FIG. 2, the outlet 13 has insertion holes 14a and 14b corresponding to the long plug blade 12a and the short plug blade 12b of the plug 11. A connecting portion 15a connected to the long plug blade 12a is provided inside the insertion hole 14a. Similarly, a connecting portion 15b connected to the short plug blade 12b is provided inside the insertion hole 14b. ing. That is, a pair of connection parts 15a and 15b is provided with respect to a pair of plug blades 12a and 12b.

  When connecting the plug 11 to the outlet 13, as shown in FIG. 2A, the long blade 12a of the plug 11 is positioned at the inlet of the insertion hole 14a of the outlet 13, and the long blade 12a of the plug 11 is connected to the outlet. It inserts in 13 insertion holes 14a. Accordingly, the short blade 12b of the plug 11 is also inserted into the insertion hole 14b of the outlet 13, and the plug 11 is further inserted into the outlet 13.

  Then, as shown in FIG. 2B, first, the short plug blade 12b comes into contact with the connecting portion 15b disposed inside the insertion hole 14b. In this state, the long plug blade 12a has not reached the connecting portion 15a disposed inside the insertion hole 14a and is in a non-contact state. That is, a gap g exists between the long plug blade 12a and the connection portion 15a, but a DC power supply voltage is applied between the connection portions 15a and 15b of the outlet 13, and the short plug blade 12b Since it is in contact with the connecting portion 15b, an arc is generated in the gap g between the long plug blade 12a and the connecting portion 15a. As a result, a direct current flows from the outlet 13 side (DC power supply side) to the plug 11 side (electric equipment side).

  In the state of FIG. 2 (b), even if an arc is generated, it is a location that is deep in the insertion hole 14a of the outlet, so that an arc generated in the gap g between the long plug blade 12a and the connection portion 15a is inserted into the insertion hole 14a. From the outside. Thereby, safety can be ensured.

  When the plug 11 is further inserted into the outlet 13 from the state of FIG. 2B, the short blade 12b is joined to the connecting portion 15b and the long blade 12a is also connected, as shown in FIG. 2C. It joins to the part 15a. Therefore, since the long plug blade 12a and the short plug blade 12b are both connected to the connecting portions 15a and 15b, no arc is generated in the state shown in FIG.

  Next, in the case where the plug 11 is detached from the outlet 13 from the state of FIG. 2C, when the plug 11 is pulled out from the outlet 13, first, the long plug blade 12a is connected to the connection portion 15a. Leave while generating an arc. Then, as shown in FIG. 2B, when the short plug blade 12b is connected to the connection portion 15b and the gap between the long plug blade 12a and the connection portion 15a exceeds the gap g, the arc disappears. In this case as well, even if an arc is generated, since it is a deep part of the insertion hole 14a of the outlet, the arc generated in the gap g between the long plug blade 12a and the connection portion 15a flows out from the insertion hole 14a. There is nothing. Thereby, safety can be ensured.

  Then, when the plug 11 is further pulled out from the state of FIG. 2B, the short plug blade 12b is detached from the connection portion 15b, so that the plug 11 is detached from the outlet and no arc is generated. Thereby, the plug 11 can be safely pulled out from the outlet 13. In this way, the pair of connecting portions 15a and 15b are electrically connected to the short plug blade 12b before the long plug blade 12b when the plug blades 12a and 12b of the plug 11 are inserted into the insertion holes 14a and 14b. Therefore, even if an arc is generated between the long plug blade 12a and the connecting portion 15a, the plug 11 can be safely inserted into the outlet 13 without the arc flowing out of the insertion hole 14a. I can take it off.

  Next, FIG. 3 is an explanatory diagram of another example of the DC power distribution connector according to the embodiment of the present invention, and FIG. 3A is another DC power distribution connector according to the embodiment of the present invention. Fig. 3B is a perspective view of an example of the plug, and Fig. 3B is a plan view of another example of the outlet for direct current distribution according to the embodiment of the present invention. In another example, the long blade 12a is replaced with a semi-cylindrical one from the one shown in FIG. That is, the vertical cross-sectional shape with respect to the insertion direction into the outlet is changed from a rectangular shape to an arc shape.

  In FIG. 3 (a), a plug 11 is a plug for direct current distribution used for an electric device driven by direct current, and is provided with a pair of plug blades 12a and 12b having different lengths. The long plug blade 12a has a circular cross-sectional shape perpendicular to the direction of insertion into the outlet. Accordingly, as shown in FIG. 3B, the outlet insertion hole 14a is also formed in an arc shape corresponding to the arc shape of the long plug blade 12a, and a connection portion (not shown) provided inside the insertion hole 14a. 15a is also formed in a circular arc shape. Thereby, since the contact area of the long plug blade 12a and the contact part 15a becomes a circular-arc-shaped curved surface, it becomes large compared with a flat-shaped plug blade, and can ensure the current capacity in a junction part. In addition, the shape formed by the insertion holes 14a and 14b of the outlet is a D-shape meaning direct current.

  In addition, since the long plug blade 12a has an arc shape, both ends of the distal end portion of the long plug blade 12a become pointed sharp portions, and when an arc is generated, the arc is concentrated on the sharp portion, It becomes easy to specify the arc generation point that occurs when the long blade 12a is inserted into and removed from the connecting portion 15a.

  In addition, it is preferable that the front-end | tip part of the long plug blade 12a is made into the shape which protruded further partially.

  In the above description, the long plug blade 12a has an arc shape, the short plug blade 12b has a planar shape, and the pair of plug blades 12a and 12b have different shapes. However, as shown in FIG. The blade 12a may be a wide planar shape, the short stopper blade 12b may be a narrow planar shape, and the pair of stopper blades 12a, 12b may be different from each other. As shown in FIG. 12a may be a wide planar shape, and the short plug blade 12b may be disposed in a direction (crossing direction) rotated 90 ° with respect to the long plug blade 12a with a narrow planar shape. Thereby, it is possible to prevent the plug 11 from being reversely inserted into the outlet 13. Further, when the long plug blade 12a has a planar shape, for example, a sharp pointed portion having a triangular shape is provided at the tip portion.

  In order to prevent the plug 11 from being reversely inserted into the outlet 13, as shown in FIG. 5, a recess 16 that fits into the shape of the plug 11 may be provided on the upper surface of the outlet 13. In this case, it is possible to prevent the plug 11 from being reversely inserted into the outlet 13 even if the pair of plug blades 12a and 12b have the same shape. Also in this case, since the shape of the plug 11 is a D shape that means direct current, the shape of the recess 16 that fits the shape of the plug 11 is also a D shape.

  Next, the pair of plug blades 12 a and 12 b may be connected to either the anode or the cathode of the outlet 13, but it is desirable to connect the long plug blade 12 a that generates an arc to the cathode of the outlet 13. This is because the arc flows from the cathode side to the plug blade side of the outlet, so that the long plug blade 12a is used as the location affected by the arc so that maintenance by the arc can be easily performed. . As a result, damage to the connecting portion 15 on the outlet 13 side is alleviated, so that the life of the outlet can be extended.

DESCRIPTION OF SYMBOLS 11 ... Plug, 12 ... Plug blade, 13 ... Outlet, 14 ... Insertion hole, 15 ... Connection part, 16 ... Recessed part

Claims (3)

A plug having a pair of plug blades of different lengths used in a DC-driven electric device;
An outlet having an insertion hole into which each plug blade of the plug is inserted;
A pair of connecting portions provided inside the insertion hole of the outlet and arranged such that when each plug blade of the plug is inserted into the insertion hole, the short plug blade is electrically connected before the long plug blade;
A DC power distribution connector characterized by comprising:   The pair of plug blades have different shapes, and the long plug blade has a larger joining area with the connection portion than the short plug blade, and has a sharp portion at a part of the tip portion. The DC power distribution connector according to claim 1.   The DC power distribution connector according to claim 1 or 2, wherein the long plug blade has a polarity connected to a cathode of the outlet.

Images