JP2016201301A - Blade receiving metal fitting and plug connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade receiving metal fitting for enhancing durability of retaining force of a blade of a plug and also to provide a plug connector.SOLUTION: A blade receiving metal fitting includes: a holding part which have a first holding surface 32a and a second holding surface 33a and holds a blade of a plug between the first holding surface 32a and the second holding surface 33a; and a first projection part 37 and a second projection part 38 which are provided on the first holding surface 32a. The first projection part 37 and the second projection part 38 have different position in an insertion/extraction direction of the blade of the plug.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a blade receiving metal fitting for receiving a blade of a plug and an insertion connector provided with the blade receiving metal fitting.

  Conventionally, plug connectors such as an outlet and a multi-tap are known. Inside such an insertion connector, a blade receiving bracket for receiving the blade of the plug is provided. Patent Document 1 discloses an insertion connector that can reduce contact resistance between a blade of a plug (plug blade) and a blade receiving bracket (blade receiving member).

JP 2006-302839 A

  The blade bracket has a function of holding the blade of the outlet inserted in the plug connector. However, when the plug blade is repeatedly inserted and removed, the holding force of the plug blade is reduced.

  The present invention provides a blade bracket and an insertion connector with improved durability of the plug blade holding force.

  The blade bracket according to one aspect of the present invention includes a first clamping surface and a second clamping surface, and a clamping unit that sandwiches a blade of the plug between the first clamping surface and the second clamping surface. The first convex portion and the second convex portion are provided on the first clamping surface, and the first convex portion and the second convex portion have different positions in the insertion / extraction direction of the blade of the plug.

  An insertion connector according to an aspect of the present invention includes the blade receiving metal fitting and a housing that has an insertion port into which the blade of the plug is inserted and accommodates the blade receiving metal fitting.

  ADVANTAGE OF THE INVENTION According to this invention, the blade receiving metal fitting and the insertion connector which improved durability of the holding force of the blade of a plug are implement | achieved.

1 is an exploded perspective view of the plug-in connector according to Embodiment 1. FIG. FIG. 2 is an enlarged view of the first clamping unit. FIG. 3 is an enlarged view of the second clamping unit. FIG. 4 is a schematic cross-sectional view of the sandwiching section cut along the ZX plane. FIG. 5A is a first cross-sectional view for describing the positional relationship between the blade of the plug and the sandwiching portion when the plug is inserted. FIG. 5B is a second cross-sectional view for explaining the positional relationship between the blade of the plug and the clamping portion when the plug is inserted. FIG. 5C is a third cross-sectional view for explaining the positional relationship between the blade of the plug and the sandwiching portion when the plug is inserted. FIG. 5D is a fourth cross-sectional view for describing the positional relationship between the blade of the plug and the clamping portion when the plug is inserted. FIG. 6 is a diagram illustrating an example of a protrusion formed of another metal member. FIG. 7 is a schematic view showing a blade bracket having a surface-treated protrusion.

  Hereinafter, a blade bracket and an insertion connector according to an embodiment will be described with reference to the drawings. It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected to substantially the same structure, and the overlapping description may be abbreviate | omitted or simplified.

(Embodiment 1)
[overall structure]
First, the overall configuration of the plug-in connector according to Embodiment 1 will be described. 1 is an exploded perspective view of the plug-in connector according to Embodiment 1. FIG. In addition, in FIG. 1, illustration is abbreviate | omitted about some components, such as the metal fitting to which the earth terminal of a plug is connected, and the quick connection terminal for connecting an electric wire to an insertion connector. In the first embodiment below, the Z axis + side is expressed as “upper side”, and the Z axis − side is expressed as “lower side”.

  The plug connector 10 shown in FIG. 1 is a plug connector used as an outlet. The insertion connector 10 is provided with two sets (insertions 26 and 27) of insertion ports into which the blades 41 of the plug 40 are inserted. That is, two plugs can be inserted into the plug connector 10. The plug connector 10 shown in FIG. 1 includes a housing (a first housing 20 and a second housing 25) and two blade brackets 30.

  The first housing 20 is a member for accommodating the blade bracket 30. The first housing 20 is provided with recesses 21 and 22 that are recessed downward to accommodate the blade bracket 30. The first housing 20 is a member having a substantially rectangular shape in a plan view (a shape viewed from the Z-axis direction), and each of the recesses 21 and 22 extends in the longitudinal direction (Y-axis direction) of the first housing 20. A long space along.

  Although not shown, an electric wire for receiving supply of AC power from the power system is inserted into the lower surface of the first housing 20. The inserted electric wire is electrically connected to the blade receiving metal fitting 30 (connection terminal portion 35) accommodated in the recess 21 (or the recess 22). Specifically, the first housing 20 is formed of a thermosetting resin such as a urea resin, for example.

  The 2nd housing | casing 25 is a member which functions as a cover which covers the blade bracket 30 accommodated in the recessed part 21 from upper direction. That is, the second casing 25 constitutes an outer casing of the blade bracket 30 together with the first casing 20.

  The second housing 25 is a substantially rectangular parallelepiped member, and insertion ports 26 and 27 into which the blades 41 of the plugs 40 are respectively inserted are provided on the upper surface of the second housing 25. Specifically, the second housing 25 is formed of a thermosetting resin such as a urea resin, for example.

  The blade receiving bracket 30 is a bracket that receives the blade 41 of the plug 40 inserted into the insertion ports 26 and 27. The blade 41 of the plug 40 inserted into the insertion ports 26 and 27 is electrically connected to the electric wire inserted from the lower surface side of the first housing 20 via the blade receiving bracket 30. Specifically, the blade bracket 30 includes a clamping part 31 (a first clamping part 32 and a second clamping part 33), a coupling part 34, and a connection terminal part 35.

  The clamping part 31 has the 1st clamping part 32 and the 2nd clamping part 33, and inserts the blade 41 of the plug 40 inserted into the insertion port 26 (or insertion port 27) of the insertion connector 10 from the top. It is sandwiched between the first clamping part 32 and the second clamping part 33. In the first embodiment, one blade bracket 30 includes two clamping portions 31, but it is sufficient that at least one clamping portion 31 is provided. A detailed configuration of the clamping unit 31 will be described later.

  The connecting portion 34 is a plate-like portion that connects the two clamping portions 31 and the connection terminal portion 35 in the blade receiving bracket 30. The connecting portion 34 has a long plate shape with the Z-axis direction being the thickness direction and being long in the Y-axis direction. The clamping part 31 is connected to each of the longitudinal ends of the connecting part 34. In addition, a connection terminal portion 35 is coupled to each of the end portions in the short direction of the coupling portion 34.

  The connection terminal portion 35 is a plate-like portion of the blade bracket 30 whose thickness direction is the X-axis direction, and is connected to each of the end portions of the connection portion 34 in the short direction.

  The shape when the connection terminal portion 35 is viewed from the side (X-axis direction) is a bracket shape divided into two downwards. A quick connection terminal (not shown) provided in the recess 21 is electrically connected to the lower end portion of the connection terminal portion 35. By inserting an electric wire into the quick connection terminal, the inserted electric wire and the blade bracket 30 are electrically connected.

  The blade receiving bracket 30 as described above is formed by pressing and bending a metal plate-like member. Specifically, the blade bracket 30 is formed of a metal such as copper or brass.

[Concrete configuration of clamping part]
Next, a specific configuration of the clamping unit 31 will be described with reference to FIGS. 2 to 4 in addition to FIG. FIG. 2 is an enlarged view of the first clamping unit 32. FIG. 3 is an enlarged view of the second clamping part 33. FIG. 4 is a schematic cross-sectional view of the clamping unit 31 cut along the ZX plane.

  The clamping part 31 of the blade bracket 30 includes a first clamping part 32 having a first clamping surface 32a and a second clamping part 33 having a second clamping surface 33a. The 1st clamping part 32 and the 2nd clamping part 33 are urged | biased in the direction where the space | interval of the 1st clamping surface 32a and the 2nd clamping surface 33a becomes narrow. Moreover, the space | interval of the 1st clamping surface 32a and the 2nd clamping surface 33a in the edge part by the side of the 2nd housing | casing 25 has expanded so that the blade 41 of the plug 40 may be introduced easily.

  When the user inserts the blade 41 of the plug 40 into the insertion port 26 (or the insertion port 27), the blade 41 of the plug 40 is formed so that the gap between the first clamping surface 32a and the second clamping surface 33a is opened. It is sandwiched between the clamping surface 32a and the second clamping surface 33a and is held by the biasing force described above.

  Here, the first clamping surface 32a is provided with a projection 36 protruding toward the second clamping surface 33a. The planar view shape of the protrusion 36 is a circle corresponding to the opening 42 provided in the blade 41 of the plug 40, and the protrusion 36 is a blade of the plug 40 in a state where the blade 41 of the plug 40 is sandwiched between the holding portions 31. It fits in the opening 42 provided in 41. Thereby, since the blade 41 of the plug 40 is caught by the protrusion 36, the holding force of the blade 41 of the plug 40 of the clamping part 31 is enhanced.

  By the way, when the blade 41 of the plug 40 is inserted into and removed from the blade receiving bracket 30, an arc discharge occurs between the blade 41 of the plug 40 and the blade receiving bracket 30, and this discharge causes the surface of the blade 41 of the plug 40 to become rough. Like a file. Since the blade 41 of the plug 40 having a rough surface hits the projection 36 at the time of insertion / extraction, the projection 36 is gradually scraped by repeated insertion / extraction of the blade 41 of the plug 40. When the protrusion 36 is cut, the holding force of the blade 41 of the plug 40 of the blade receiving bracket 30 is reduced.

  Therefore, in the blade receiving metal 30, it becomes a subject to improve the durability of the holding force of the blade 41 of the plug 40.

  2 and FIG. 4, the blade receiving bracket 30 includes a first convex portion 37 and a second convex portion 38 provided on the first clamping surface 32a. The 1st convex part 37 and the 2nd convex part 38 each protrude toward the 2nd clamping surface 33a side. Specifically, each of the first convex portion 37 and the second convex portion 38 is formed by providing a step in the projection 36 as a part of the projection 36.

  Moreover, the position in the insertion / extraction direction of the blade 41 of the plug 40 differs between the 1st convex part 37 and the 2nd convex part 38. FIG. Specifically, the first convex portion 37 and the second convex portion 38 are arranged side by side in the insertion / extraction direction of the blade 41 of the plug 40, and the first convex portion 37 is a blade of the plug 40 rather than the second convex portion 38. 41 is located on the back side (Z-axis side in the figure) in the insertion / extraction direction.

  Moreover, the height from the 1st clamping surface 32a differs in the 1st convex part 37 and the 2nd convex part 38. FIG. The height of the first convex portion 37 from the first clamping surface 32 a is higher than that of the second convex portion 38. Specifically, the first convex portion 37 has a height h1 from the first clamping surface 32a of about 0.20 mm, and the second convex portion 38 has a height h2 from the first clamping surface 32a of 0.1 mm. It is about 15 mm.

  If two convex portions such as the first convex portion 37 and the second convex portion 38 are provided, the durability of the holding force of the blade 41 of the plug 40 can be enhanced. 5A to 5D are cross-sectional views for explaining the positional relationship between the blade 41 of the plug 40 and the clamping portion 31 when the plug 40 is inserted. 5A to 5D are a series of diagrams illustrating how the blade of the plug 40 is inserted over time (in the order of FIGS. 5A to 5D).

  As shown in FIG. 5A to FIG. 5C, when the blade 41 of the plug 40 is inserted into the blade receiving bracket 30, the gap between the first clamping surface 32 a and the second clamping surface 33 a is opened, and the blade 41 of the plug 40 is It will be inserted. At this time, as shown in FIG. 5C, the first convex portion 37 abuts on the surface of the blade 41 of the plug 40, but the second convex portion 38 does not abut. Then, as shown in FIG. 5D, when the blade 41 of the plug 40 is completely inserted, the projection 36 fits into the opening 42, and the plug 40 is caused by the urging force of the clamping portion 31 and the projection 36 fitted in the opening 42. The blade 41 is held.

  Thus, when the height from the first clamping surface 32a of the first convex portion 37 is higher than the height from the first clamping surface 32a of the second convex portion 38, only the first convex portion 37 is in the plug 40. It hits the blade 41. Although not shown, when the height of the first convex portion 37 from the first clamping surface 32a is higher than the height of the second convex portion 38 from the first clamping surface 32a even when the plug 40 is pulled out, Only one convex portion 37 corresponds to the blade 41 of the plug 40.

  For this reason, when the insertion / extraction of the blade 41 of the plug 40 is repeated, the first convex portion 37 is shaved first, and after the first convex portion 37 is shaved, the second convex portion 38 starts to be shaved. Therefore, the second convex portion 38 remains even after the first convex portion 37 is shaved, and the height of the protrusion 36 can be maintained by a certain amount. For this reason, durability of the holding force of the blade 41 of the plug 40 in the blade bracket 30 can be enhanced.

  In addition, what is necessary is just to provide at least 2 convex part from which the position in the insertion / extraction direction of the blade 41 of the plug 40 differs in the 1st clamping surface 32a. According to such a configuration, after the insertion and removal of the blade 41 of the plug 40 is repeated, the convex shape tends to remain as compared with the case where there is only one convex portion, and thus the durability of the holding force of the blade 41 of the plug 40 is improved. be able to.

  Moreover, according to the structure by which the 2nd convex part from which the position in the insertion / extraction direction of the blade 41 of the plug 40 differs is provided in the 1st clamping surface 32a, the 1st clamping surface 32a is hard to scrape (it takes time until it begins to scrape). Therefore, the lifetime can be ensured even if the plate thickness of the blade bracket 30 is reduced. That is, if two convex portions such as the first convex portion 37 and the second convex portion 38 are provided, the plate thickness can be reduced, and the reduction in the member cost of the blade receiving metal fitting 30 can be reduced by the reduction in thickness. Can be realized.

  In the blade receiving bracket 30, two convex portions having different heights are provided on the first clamping surface 32a, and when the blade 41 of the plug 40 is inserted / removed as described with reference to FIGS. 5A to 5D. Only one convex part hits the surface of the blade 41 of the plug 40. Therefore, the feeling when the user inserts and removes the blade 41 of the plug 40 with respect to the blade receiving bracket 30 is not significantly different from the conventional blade receiving bracket.

[Modification]
In order to make it difficult to scrape the protrusions 36 (the first protrusions 37 and the second protrusions 38), the protrusions 36 are preferably harder (higher in hardness) than the sandwiching part 31. Therefore, an example in which the protrusion 36 is less likely to be scraped will be described below.

  The protrusion 36 is formed by performing a pressing process in a state before the blade receiving metal fitting 30 is bent (a state of being a plate-like metal member). For example, after the protrusion 36 is formed, the protrusion 36 may be formed to be harder than the sandwiching portion 31 by further performing mechanical processing such as shot peening on the protrusion 36. Thereby, durability of the holding force of the blade 41 of the plug 40 in the blade bracket 30 can be enhanced.

  Further, in order to make it difficult for the projection to be scraped off, the projection may be formed of a metal material harder than the metal material forming the holding portion 31. FIG. 6 is a diagram illustrating an example of a protrusion formed of another metal member.

  As described above, the blade bracket 30 is made of, for example, copper. Therefore, as shown in FIG. 6, the entire protrusion 36 a may be formed by joining a metal material 50 harder than copper to a plate-shaped copper material before being bent. Here, the metal material 50 is, for example, a stainless steel material (SUS304), and the joining method is resistance welding, but the material and the joining method are not particularly limited.

  In addition, in order to make the protrusions difficult to cut, the hardness of the protrusion portions may be increased by subjecting the protrusion portions to surface treatment. FIG. 7 is a schematic view showing a blade receiving metal fitting 30b having a surface-treated protrusion.

  For example, the surface of the projection 36b (the surface facing the second clamping surface 33a) of the blade receiving bracket 30b may be plated with a metal material harder than the metal material (copper) forming the projection 36b. The plating material is, for example, high-strength chromium, but is not particularly limited. The plating process may be performed at least on the surface of the protrusion 36b.

  In addition, for example, a metal material harder than the metal material (copper) forming the protrusion 36b may be attached to the surface of the protrusion 36b of the blade receiving bracket 30b. For example, the blade bracket 30b may be formed by pressing and bending a clad material in which a metal harder than copper is bonded to at least a portion where the protrusion 36b is formed. The metal bonded to copper is, for example, a stainless steel material (SUS304), but is not particularly limited.

  In manufacturing such a blade receiving metal fitting 30b, it is not necessary to add processes other than pressing and bending. For this reason, there exists an advantage that preparation is easy.

[Summary]
As described above, the blade holder 30 according to the first embodiment has the first clamping surface 32a and the second clamping surface 33a, and is between the first clamping surface 32a and the second clamping surface 33a. A sandwiching portion 31 that sandwiches the blade 41 of the plug 40 and a first projecting portion 37 and a second projecting portion 38 provided on the first sandwiching surface 32a are provided. The first convex portion 37 and the second convex portion 38 have different positions in the insertion / extraction direction of the blade 41 of the plug 40.

  Since such a blade receiving bracket 30 includes the first convex portion 37 and the second convex portion 38, the convex shape is more than that when there is one convex portion after repeated insertion and removal of the blade 41 of the plug 40. Easy to remain. For this reason, durability of the holding force of the blade 41 of the plug 40 can be enhanced.

  Further, since the convex shape tends to remain, the first clamping surface 32a is hard to be scraped, and the life can be ensured even if the plate thickness of the blade bracket 30 is reduced. Accordingly, the plate thickness of the blade receiving metal fitting 30 can be reduced, and the material cost of the blade receiving metal fitting 30 can be reduced by the reduction in thickness.

  Further, when the opening 41 is provided in the blade 41 of the plug 40, the blade receiving metal 30 is further fitted into the opening 42 in a state where the blade 41 of the plug 40 is sandwiched between the holding portions 31. The first protrusion 37 and the second protrusion 38 may be a part of the protrusion 36.

  In such a blade receiving bracket 30, the convex shape tends to remain on the protrusion 36 after repeated insertion and removal of the blade 41 of the plug 40. For this reason, durability of the holding force of the blade 41 of the plug 40 having the opening 42 can be enhanced.

  Moreover, the height from the 1st clamping surface 32a may differ between the 1st convex part 37 and the 2nd convex part 38. FIG.

  For example, when the height of the first convex portion 37 from the first clamping surface 32a is higher than the height of the second convex portion 38 from the first clamping surface 32a, when the insertion and removal of the blade 41 of the plug 40 is repeated, The first convex portion 37 is shaved first, and after the first convex portion 37 is shaved, the second convex portion 38 begins to be shaved. Therefore, the second convex portion 38 remains even after the first convex portion 37 is shaved, and the height of the protrusion 36 can be maintained by a certain amount. For this reason, durability of the holding force of the blade 41 of the plug 40 in the blade bracket 30 can be enhanced.

  Further, the protrusion 36 may be harder than the sandwiching portion 31. Specifically, the protrusion 36 may be harder than the clamping part 31 by performing a mechanical process. Further, the protrusion 36 may be formed of a metal material that is harder than the metal material that forms the sandwiching portion 31.

  Thereby, the protrusion 36 (the 1st convex part 37 and the 2nd convex part 38) can be made hard to scrape.

  Further, a metal material harder than the metal material forming the protrusion 36 may be attached to the surface of the protrusion 36. Alternatively, the surface of the protrusion 36 may be plated with a metal material harder than the metal material forming the protrusion 36.

  Thereby, the protrusion 36 (the 1st convex part 37 and the 2nd convex part 38) can be made hard to scrape.

  Further, the insertion connector 10 according to the first embodiment includes a blade receiving metal fitting 30 and insertion ports 26 and 27 into which the blade 41 of the plug 40 is inserted, and a housing that houses the blade receiving metal fitting 30 ( A first housing 20 and a second housing 25).

  Thereby, the plug connector 10 with improved durability of the holding force of the blade 41 of the plug 40 is realized.

(Other embodiments)
As mentioned above, although the blade bracket which concerns on Embodiment 1, and the insertion connector provided with this were demonstrated, this invention is not limited to the said Embodiment 1. FIG.

  For example, in the first embodiment, the plug blade is provided with an opening. However, since the blade bracket according to the first embodiment has two convex portions having different positions in the insertion / extraction direction of the plug blade, even when the blade of the plug having no opening is repeatedly inserted and extracted, Can easily remain, and the effect of increasing the durability of the holding force of the plug blade can be obtained.

  Further, in this way, when assuming a blade of a plug that is not provided with an opening, it is not necessary to provide a protrusion on the blade receiving bracket. Therefore, the first convex portion and the second convex portion do not need to be formed as a part of the protrusion, and the positions of the plug blades in the insertion / extraction direction may be different.

  In Embodiment 1 described above, the first convex portion is described as being higher in height from the first clamping surface than the second convex portion, but the first convex portion and the second convex portion are the first clamping portion. The height from the surface should be different. Therefore, for example, the height of the first convex portion from the first clamping surface may be lower than that of the second convex portion. Even in such a case, the effect of increasing the durability of the holding force of the plug blade can be obtained.

  In addition, it is realized by variously conceiving various modifications conceived by those skilled in the art for each embodiment, or by arbitrarily combining the components and functions in each embodiment without departing from the spirit of the present invention. This form is also included in the present invention.

  For example, in Embodiment 1 described above, the plug connector used as an outlet is illustrated, but the present invention may be realized as a plug connector such as a multi-tap (table tap) or a connector body. .

10 Plug connector 20 First housing (housing)
25 Second housing (housing)
26, 27 Insert 30, 30b Blade holder 31 Clamping portion 32a First clamping surface 33a Second clamping surface 36, 36a, 36b Protrusion 37 First convex portion 38 Second convex portion 40 Plug 41 Blade 42 Opening

Claims (9)

A sandwiching portion having a first sandwiching surface and a second sandwiching surface, and sandwiching a blade of the plug between the first sandwiching surface and the second sandwiching surface;
The first convex portion and the second convex portion provided on the first clamping surface,
The first convex portion and the second convex portion have different positions in the insertion / extraction direction of the blade of the plug. The blade of the plug is provided with an opening,
The blade bracket further includes a protrusion provided on the first clamping surface that fits into the opening in a state where the blade of the plug is sandwiched between the clamping parts.
The blade receiving bracket according to claim 1, wherein the first protrusion and the second protrusion are a part of the protrusion. The blade bracket according to claim 1 or 2, wherein the first convex portion and the second convex portion have different heights from the first clamping surface. The blade receiving bracket according to claim 2, wherein the protrusion is harder than the clamping portion. The blade receiving metal fitting according to claim 4, wherein the protrusion is harder than the clamping portion when subjected to a mechanical treatment. The blade receiving metal fitting according to claim 4, wherein the protrusion is formed of a metal material harder than a metal material forming the clamping portion. The blade receiving metal fitting according to claim 2, wherein a metal material harder than a metal material forming the protrusion is attached to a surface of the protrusion. The blade receiving metal fitting according to claim 2, wherein the surface of the protrusion is plated with a metal material harder than a metal material forming the protrusion. The blade bracket according to any one of claims 1 to 8,
An insertion connector having an insertion port into which the blade of the plug is inserted, and a housing that houses the blade receiving bracket.

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