JP4513639B2 - Plug connector - Google Patents

Description

  The present invention relates to an insertion connector provided with a blade receiving member that is electrically connected to the plug blade by receiving the plug blade inserted from the insertion port opened in the container.

  Conventionally, the blade receiving member of this type of plug connector has been mainly used as a power supply outlet. For example, in a table tap as shown in FIG. A blade receiving member 6 is provided on a pair of connected terminal plates 7. Each terminal plate 7 is formed of a single conductive metal plate, and three blade receiving members 6 are integrated with each other so as to correspond to the three sets of insertion ports 1 to 3 of the container 4. Is provided.

Each blade receiving member 6 has two spring pieces 34 and 35 which face each other in the thickness direction, and both spring pieces 34 and 35 are connected by a connecting piece 36. Each blade receiving member 6 is electrically connected to the plug blade 5 by sandwiching the plug blade 5 (see FIG. 3) inserted from the insertion ports 1 to 3 between the two spring pieces 34 and 35. (See, for example, Patent Document 1).
JP 2004-227784 A (page 5)

  By the way, in the plug connector described above, it is desirable that the plug blade 5 and the spring pieces 34, 35 be parallel to each other in the cross section perpendicular to the insertion direction of the plug blade 5 when the plug blade 5 is inserted. The spring pieces 34 and 35 may not be parallel to the plug blade 5 because the member 6 is displaced from the normal position in the container 4 or the spring pieces 34 and 35 are plastically deformed when the plug blade 5 is inserted and removed. is there. The spring pieces 34 and 35 that are not parallel to the blade 5 come into contact with the blade 5 by contacting only one end portion in the width direction of the blade 5. As a result, the portion of the blade receiving member 6 that contacts the plug blade 5 becomes narrow and the contact resistance with the plug blade 5 increases, so that the temperature of the portion where the blade receiving member 6 and the plug blade 5 come into contact when energized increases. May be connected.

  This invention is made | formed in view of the said reason, Comprising: It aims at providing the insertion connector which can reduce the contact resistance between a plug blade and a blade receiving member.

The invention according to claim 1 is a first spring piece made of a metal plate, a second spring piece made of a metal plate and disposed opposite to the first spring piece in the thickness direction, and the first spring piece. And a connecting piece for connecting the second spring piece at a fixed position in the body, and a plug inserted from an insertion port opened in a corresponding portion between the first and second spring pieces in the body. A blade receiving member that is electrically connected to the plug blade by sandwiching the blade between the first spring piece and the second spring piece, and the first spring piece is inserted in the direction in which the plug blade is inserted. The first contact piece is formed by cutting up and raising toward the second spring piece such that a part of the side far from the insertion port is the tip of the end opposite to the insertion port. blade constitutes a contact piece portion of the outlet side of the second in the direction in which it is inserted, the first and second contact pieces are aligned in the direction in which the plug pins are inserted The blade between the second spring pieces respectively, characterized in the individual clamping THIS Turkey.

According to this configuration, the blade receiving member comes into contact with the plug blade at least in each of the second spring piece and the first and second contact pieces. Therefore, even when the plug blade is inserted, even if the plug blade and the first spring piece are not parallel in the cross section orthogonal to the insertion direction of the plug blade, at least each of the second spring piece and each contact piece is will be in contact with the plug pins, in comparison with the traditional configuration, a portion in contact with the plug pins widens in the blade receiving member. In addition, the first contact piece is pushed out to the second spring piece side by bending the entire first spring piece in a state where the plug blade is in contact with only the second contact piece. The contact pressure with is relatively large. Therefore, compared with the conventional configuration, the contact resistance between the blade receiving member and the plug blade can be reduced, and the temperature rise at the portion where the blade receiving member and the plug blade are in contact can be suppressed. Further, the first contact piece comes into contact with the plug blade after the plug blade comes into contact with the second contact piece when the plug blade is inserted, and from the second contact piece when the plug blade is pulled out. Before the blade leaves, it leaves the blade. That is, when the plug blade is inserted and removed, the first contact piece and the plug blade come in contact with and separate from each other while the plug blade is in contact with the second contact piece. An arc is not generated between the blades. Therefore, the first contact piece is not consumed by the arc and has little change with time.

In the invention of claim 2, in the invention according to the first, the first and second of said contact pieces, the first contact piece opposing area between the second spring part than the second contact piece Each of which has a contact protrusion protruding in a direction to reduce the distance from the second spring piece so as to contact the plug blade inserted from the insertion port, The first contact piece has a contact protrusion at a position farther from the insertion port than the second contact piece in the direction in which the plug blade is inserted.

According to this configuration, since the position of the contact protrusion is shifted in the insertion direction of the plug blade for each contact piece, the force required for inserting and removing the plug blade is the force of the first contact piece and the second spring piece. that the force for insertion and removal of the blade, will be dispersed into a force for insertion and removal of the blade between the second contact piece and the second spring part, which insertion the plug pins with a relatively small force during Can do . Et al of the first contact piece is not easily plastically deformed from smaller than the second contact piece. As a result, a blade support member having a relatively long life can be provided. In addition, the first contact piece is smaller than the second contact piece and has a small cross-sectional area of the electric path through which the current accompanying the arc flows. However, no arc is generated between the first contact piece and the plug blade. Therefore, the electric current accompanying the arc does not flow through the first contact piece, and the temperature increase due to the electric current accompanying the arc does not occur in the first contact piece.

According to the present invention, the blade receiving member comes into contact with the plug blade at least in each of the second spring piece and the first and second contact pieces. Therefore, even when the plug blade is inserted, even if the plug blade and the first spring piece are not parallel in the cross section orthogonal to the insertion direction of the plug blade, at least each of the second spring piece and each contact piece is will be in contact with the plug pins, in comparison with the traditional configuration, a portion in contact with the plug pins widens in the blade receiving member. In addition, the first contact piece is pushed out to the second spring piece side by bending the entire first spring piece in a state where the plug blade is in contact with only the second contact piece. The contact pressure with is relatively large. Therefore, compared to the conventional configuration, the contact resistance between the blade receiving member and the plug blade can be reduced, and the temperature rise at the portion where the blade receiving member and the plug blade are in contact can be suppressed. Further, the first contact piece comes into contact with the plug blade after the plug blade comes into contact with the second contact piece when the plug blade is inserted, and from the second contact piece when the plug blade is pulled out. Before the blade leaves, it leaves the blade. That is, when the plug blade is inserted and removed, the first contact piece and the plug blade are brought into contact with and separated from each other while the plug blade is in contact with the second contact piece. An arc is not generated between the blades. Therefore, the first contact piece is not consumed by the arc and has little change with time.

(Embodiment 1)
In this embodiment, the blade receiving member 6 incorporated in the table tap as described in the conventional configuration is exemplified as the blade receiving member 6 of the plug connector.

  As shown in FIG. 2, the table tap of the present embodiment includes a container body 4 in which three pairs of insertion ports 1 to 3 are opened so that three plugs (not shown) can be connected, and the container body 4. And a terminal plate 7 having three sets of blade receiving members 6 for receiving the plug blades 5 (see FIG. 3) of the plugs housed therein and inserted through the insertion ports 1 to 3. Each blade receiving member 6 has two spring pieces 34 and 35 which face each other in the thickness direction, and both spring pieces 34 and 35 are connected by a connecting piece 36. The blade receiving member 6 will be described in detail later. In the following description, the top and bottom of FIG.

  The body 4 includes an inner body 8 having an upper surface opening and an inner cover 9 that is covered on the upper surface of the inner body 8, and an outer body 11 having an upper surface opening. And an outer cover 12 that covers the upper surface of the outer body 11 and an outer body 13 that surrounds the inner body 10 so as to expose the insertion ports 1 to 3. The inner body 10 has a longitudinal direction in which two sets of insertion ports 1 and 2 are arranged on the upper surface along the longitudinal direction of each insertion port 1 and 2, and the two sets of insertion ports 1 and 2 are arranged side by side. One set of insertion ports 3 is opened at one end face in the direction. That is, in the outer body 13, an opening window 14 that exposes the upper surface of the inner cover 9 is provided through the upper surface of the outer cover 12, and a window hole 15 that exposes one longitudinal end surface of the inner body 10 is long. It is penetrated in the end surface of a direction. Further, an insertion hole 17 through which a power cord 16 (described later) is inserted is provided at the other end in the longitudinal direction of the outer body 13, and a bushing 18 that holds the power cord 16 in the insertion hole 17 is connected to the outer body 11. It is clamped between the outer cover 12. The outer body 13 is formed from a thermoplastic resin having impact resistance, and the inner body 10 is formed from a thermosetting resin having heat resistance.

  The outer body 11 and the outer cover 12 are coupled using an assembly screw (not shown) inserted from the lower surface side of the outer body 11. Here, in the longitudinal direction of the outer body 11, cylindrical bosses 19, 20 projecting upward are formed at the end portion and the center portion on the insertion hole 17 side, and are inserted into the boss holes 21 of one boss 19. The assembly screw is screwed into the outer cover 12. Further, a through hole 22 through which the boss 20 is inserted is formed in a portion corresponding to the other boss 20 in the inner body 8, and an assembly screw inserted into the boss hole 21 of the boss 20 is screwed into the inner cover 9. Match. Furthermore, two assembly projections 23 are provided on each side surface of the inner cover 9 in the width direction, and assembly claws 24 are provided on the outer cover 12 so as to engage with the assembly projections 23, respectively. By simply applying a force to bring the outer cover 12 closer to the inner cover 9, the assembly claw 24 engages with the assembly protrusion 23 and the outer cover 12 is coupled to the inner cover 9. The body 13 is coupled. The inner cover 9 is provided with a positioning hole (not shown) into which a positioning protrusion 25 protruding from one end portion in the longitudinal direction of the inner body 8 is inserted.

  The inner body 8 is divided into two in the width direction by partition ribs 26 formed on the center line along the longitudinal direction, thereby forming two terminal plate storage chambers 27. Each terminal plate storage chamber 27 stores a terminal plate 7.

  Each terminal plate 7 is formed from a single conductive metal plate, and three blade receiving members 6 are integrally provided. Further, each terminal plate 7 is integrally provided with a terminal portion 28 for connecting the power cord 16 to one end portion in the longitudinal direction, and the terminal portion 28 is sandwiched between the terminal portions 28 so as to sandwich the power cord 16. By caulking, the terminal board 7 and the power cord 16 are electrically and mechanically connected. The terminal portion 28 of each terminal plate 7 is accommodated not in the inner body 10 but in a portion that forms a gap with the inner body 10 in the outer body 13. The outer body 11 is formed with an insulating wall 29 that insulates between the terminal portions 28 by being erected between the terminal portions 28 from the inner peripheral surface.

  Each terminal plate 7 connects the two blade receiving members 6 between the two blade receiving members 6 corresponding to the two sets of insertion ports 1 and 2 arranged in parallel on the upper surface of the inner body 10. , And has a mounting portion 31 that is placed across two support bases 30 projecting from the bottom surface of the terminal board storage chamber 27 of the inner body 8. Two positioning holes 33 through which positioning protrusions 32 projecting from the front end surface of 30 are press-fitted are provided.

  In each blade receiving member 6 connected by the mounting portion 31, the connecting piece 36 for connecting both the spring pieces 34, 35 is the width of the spring pieces 34, 35 on both sides in the width direction of the spring pieces 34, 35. The cross section orthogonal to the direction is a U-shape opened downward, and the lower end is formed to be continuous with the lower ends of the spring pieces 34 and 35. The connecting piece 36 positioned between the mounting portion 31 and the spring pieces 34, 35 has an upper end continuous to the mounting portion 31, and the connecting piece 36 positioned between the spring pieces 34, 35 and the terminal portion 28 is The upper end portion is continuous with the terminal portion 28. Further, the blade receiving member 6 corresponding to the insertion port 3 opened at one end surface in the longitudinal direction of the inner shell 10 shares the connecting piece 36 with the adjacent blade receiving member 6. It has a pair of spring pieces 34, 35 that protrude along the longitudinal direction of the body 10.

  Each spring piece 34, 35 is bent in the longitudinal direction so as to be convex in a direction to narrow the distance from the other spring piece 34, 35, and is plugged at the end on the side of the insertion port 1-3. In order to facilitate the introduction of the blade 5, it is formed to increase the distance from the other spring pieces 34, 35 toward the insertion ports 1 to 3. Here, in the opposing direction of each spring piece 34, 35, the portion closest to the intermediate position between both spring pieces 34, 35 is the contact point where the blade 5 first comes into contact with each spring piece 34, 35 when the blade 5 is inserted. The contact protrusions 34c and 35c (see FIG. 4) are formed. The contact protrusions 34c and 35c will be described later.

  By the way, the blade receiving member 6 of this embodiment employs spring pieces 34 and 35 having the shapes described below, thereby reducing the contact resistance with the plug blade 5 compared to the conventional configuration. Hereinafter, one blade receiving member 6 will be described, but the same configuration is adopted for all the blade receiving members 6.

  In the present embodiment, as shown in FIG. 1, the slit groove 37 is inserted into one spring piece 34 (first spring piece) along the direction in which the plug blade 5 is inserted from the end on the insertion port 1 to 3 side. The spring piece 34 includes a pair of contact pieces 34a and 34b divided in the width direction by the slit groove 37. That is, the pair of contact pieces 34 a and 34 b are arranged in the width direction of the spring piece 34 with the slit groove 37 interposed therebetween. Here, the slit groove 37 is cut to the vicinity of the central portion in the longitudinal direction of the spring piece 34, and the slit groove 37 does not separate the pair of contact pieces 34a and 34b. However, the slit groove 37 is cut to a portion where the contact protrusion 34c is separated in the width direction of the spring piece 34, and the contact protrusion 34c exists in each of the contact pieces 34a and 34b. In addition, the slit groove 37 is cut in the center portion in the width direction of the spring piece 34, and the pair of contact pieces 34a and 34b are formed in the same size.

  According to the shape of the spring piece 34 described above, each contact piece 34a, 34b is opposed to the other spring piece 35 (second spring piece) in the thickness direction as shown in FIG. When inserting the blades 5, the plug blades 5 are individually held between the spring pieces 35. That is, the blade receiving member 6 comes into contact with the plug blade 5 at least in each of the spring piece 35 and the pair of contact pieces 34a and 34b. Therefore, as described in the conventional configuration, even when the plug blade 5 and the one spring piece 34 are not parallel to each other in the cross section perpendicular to the insertion direction of the plug blade 5 when the plug blade 5 is inserted, each contact piece 34a, 34b comes into contact with the plug blade 5, and the spring piece 34 can be prevented from coming into contact with only one end in the width direction of the plug blade 5. Even when the plug blade 5 and the other spring piece 35 are not parallel in the cross section perpendicular to the insertion direction of the plug blade 5 when the plug blade 5 is inserted, the pair of contact pieces 34a and 34b Both end portions in the width direction can be pressed against the spring piece 35 to bring the plug blade 5 and the spring piece 35 into surface contact, and contact between the plug blade 5 and the spring piece 35 can be prevented. As a result, since the portion where the blade receiving member 6 and the plug blade 5 are in contact with each other is wider than in the conventional configuration, the contact resistance between the blade receiving member 6 and the plug blade 5 can be reduced, and the blade receiving member 6 The temperature rise at the portion where the blade 5 comes into contact with the blade 5 can be suppressed.

  In the present embodiment, as shown in FIG. 4, the positions of the contact protrusions 34c, 35c in the insertion direction of the plug blade 5 (vertical direction in the figure) are different for each spring piece 34, 35, and the slit groove 37 is cut. The abutting projection 34c of the inserted spring piece 34 is provided at a position (lower in the drawing) farther from the insertion ports 1 to 3 than the abutting projection 35c of the other spring piece 35 is. As a result, when inserting the plug blade 5, the plug blade 5 inserted from the insertion ports 1 to 3 first comes into contact with the spring piece 35 without the slit groove 37, and then contacts the spring piece 34 with the slit groove 37. It will abut. On the contrary, when the plug blade 5 is pulled out in the direction of the arrow A in the figure, the plug blade 5 is separated from the spring piece 34 having the slit groove 37 before leaving the spring piece 35 having no slit groove 37. That is, when the plug blade 5 is inserted and removed, the spring piece 34 having the slit groove 37 and the plug blade 5 are brought into contact with and separated from each other while the plug blade 5 is in contact with the other spring piece 35. An arc is not generated between the spring piece 34 having the slit groove 37 and the plug blade 5. The spring piece 34 has a smaller cross-sectional area of the electric path through which the current accompanying the arc flows by the amount of the slit groove 37. However, since the arc is not generated in the spring piece 34 as described above, the current accompanying the arc flows through the spring piece 34. In other words, it is possible to prevent the spring piece 34 from increasing in temperature due to the electric current associated with the arc.

  Further, since the fitting hole 38 penetrating in the thickness direction is formed through the plug blade 5 of this type of insertion connector, a portion corresponding to the fitting hole 38 in the spring piece 35 having no slit groove 37 is provided. In this case, a fitting protrusion 39 protruding in a direction to reduce the distance from the spring piece 34 is formed, and when the plug blade 5 is inserted, the fitting protrusion 39 is fitted into the fitting hole 38 so that the plug blade 5 is received by the blade holder. The member 6 is prevented from coming off. Since the spring piece 35 without the slit groove 37 is harder and harder to bend than the spring piece 34 as much as the slit groove 37 does not exist, the fitting protrusion 39 is provided on the spring piece 35 without the slit groove 37 in this way. The spring piece 35 is unlikely to be bent in the direction in which the fitting projection 39 comes out of the fitting hole 38, and there is an advantage that the stopper blade 5 can be reliably prevented from coming off.

Further, a configuration in which the pair of contact pieces 34 a and 34 b are arranged in the longitudinal direction of the spring piece 34 instead of the width direction of the spring piece 34 may be employed. That is, as shown in FIG. 5, a part of the spring piece 34 on the side far from the insertion ports 1 to 3 in the longitudinal direction is cut toward the other spring piece 35 in the center in the width direction of the spring piece 34. Thus, the cut-and-raised part and the part on the side of the insertion ports 1 to 3 in the longitudinal direction of the spring piece 34 can be made contact pieces 34a and 34b, respectively. The cut and raised contact piece (first contact piece) 34a has an end on the insertion port 1 to 3 side continuous with the other contact piece (second contact piece) 34b along the longitudinal direction of the spring piece 34. It becomes the form to do. Here, each contact piece 34a, 34b is formed with a contact protrusion 34c protruding in a direction to reduce the distance from the other spring piece 35 in the opposing direction of both spring pieces 34, 35 (FIG. 5D). )reference).

In this configuration, when inserting the plug pins 5, blade 5 to the contact piece 34b closer to the insertion port 1-3 is brought into contact with the above, the contact piece subsequently facing away from the insertion port 1-3 The plug blade 5 comes into contact with 34a. Here, when the plug blade 5 is in contact with only one contact piece 34b, the entire spring piece 34 is bent so that the contact piece 34b is separated from the other spring piece 35, whereby the contact protrusion of the contact piece 34a. Since 34c is pushed out to the other spring piece 35 side, there exists an advantage that the contact pressure of the contact piece 34a and the plug blade 5 becomes comparatively large. Moreover, when the plug blade 5 is inserted and removed, the contact piece 34a and the plug blade 5 are brought into contact with and separated from each other while the plug blade 5 is in contact with the contact piece 34b. There is no arc between the two. Therefore, the contact piece 34a is not consumed by the arc, and changes with time are small.

  Since the blade receiving member 6 of the present embodiment is characterized by the shapes of the spring pieces 34 and 35, the design of the connecting piece 36 can be changed as appropriate as shown in FIG. A terminal plate 7 shown in FIG. 6A has a pair of spring pieces 34, in two blade receiving members 6 corresponding to two sets of insertion ports 1 and 2 arranged side by side on the upper surface of the inner body 10. A connecting piece 36 that connects the lower ends of 35 along the opposing direction of both spring pieces 34 and 35 within a plane orthogonal to the insertion direction of the plug blade 5 is employed. 6 (b), in addition to the configuration of FIG. 6 (a), the blade receiving member 6 corresponding to the insertion port 3 opened at one end surface in the longitudinal direction of the inner body 10 is also provided. The ends of the pair of spring pieces 34, 35 opposite to the insertion port 3 in the longitudinal direction are connected along the opposing direction of the spring pieces 34, 35 within a plane orthogonal to the insertion direction of the plug blade 5. The connecting piece 36 is used.

  Furthermore, as shown in FIG. 7, a slit groove 37 can be formed in both spring pieces 34 and 35, and a pair of contact pieces 34a, 34b, 35a and 35b can be formed in each spring piece 34 and 35, respectively. . In the configuration in which the slit grooves 37 are formed in both the spring pieces 34 and 35 as described above, the fitting protrusion 39 that prevents the stopper blade 5 from coming off by being fitted in the fitting hole 38 of the stopper blade 5 as described above. A pair of contact pieces 35a and 35b are formed across the slit groove 7.

( Reference Example 1 )
In the blade receiving member 6 of the first embodiment, the slit groove 37 is cut to the vicinity of the central portion in the longitudinal direction of the spring piece 34, whereas in the blade receiving member 6 of the present configuration example , FIG. As shown, the slit groove 37 is cut across both ends of the spring piece 34 in the longitudinal direction. That is, in this configuration example , the pair of contact pieces 34 a and 34 b are separated with the slit groove 37 interposed therebetween. The contact pieces 34 a and 34 b are individually connected to the connecting piece 36, and are individually connected to the other spring piece 35. However, in the blade receiving member 6 corresponding to the insertion port 3 opened at one end surface in the longitudinal direction of the inner body 10, the slit groove 37 is cut into the vicinity of the central portion in the longitudinal direction of the spring piece 34. is there.

By the way, when inserting / removing the plug blade 5, it is desirable to insert / remove the plug blade 5 in a direction perpendicular to the opening surface of the insertion ports 1, 2, but in a direction orthogonal to the opening surface of the insertion ports 1, 2. On the other hand, the plug blade 5 may be inserted and removed with an inclination. In such a case, an abnormal external force is applied from the plug blade 5 to the spring piece 34, and the spring piece 34 may be plastically deformed. According to the configuration of this configuration example , the pair of contact pieces 34a and 34b are separated, and even if an abnormal external force is applied to one contact piece 34a and the contact piece 34a is plastically deformed, the pair of contact pieces 34a 34b are plastically deformed independently of each other, so that the other contact piece 34b can sandwich the plug blade 5 with the spring piece 35 without plastic deformation, and the blade receiving member 6 and the plug blade 5 can be electrically connected. Moreover, each of the contact pieces 34a and 34b has an advantage that it is difficult to be plastically deformed because the width dimension is smaller than that of the spring piece 35. Other configurations and functions are the same as those of the first embodiment.

( Reference Example 2 )
As shown in FIG. 9, the blade receiving member 6 of the present configuration example is formed with a slit groove 37 at a position biased to one side in the width direction of the spring piece 34, so that the other spring in the pair of contact pieces 34a and 34b. The areas facing the pieces 35 are made different from each other. Further, the contact piece 34b having a smaller area facing the spring piece 35 has a contact protrusion 34c at a position farther from the insertion ports 1 to 3 than the contact piece 34a having a larger size in the insertion direction of the plug blade 35. Thus, each contact piece 34a, 34b is formed. Here, the contact protrusion 35c of the other spring piece 35 is located between the contact protrusions 34c of the pair of contact pieces 34a, 34b in the insertion direction of the plug blade 5. That is, the plug blade 5 inserted from the insertion ports 1 to 3 comes into contact with the larger contact piece 34a, the spring piece 35, and the smaller contact piece 34b in this order.

According to the configuration of this configuration example , since the position of the contact protrusion 34c is shifted in the insertion direction of the plug blade 5 for each of the contact pieces 34a and 34b, the force required for inserting and removing the plug blade 5 is the one contact The force that inserts and removes the plug blade 5 between the piece 34a and the spring piece 35 and the force that inserts and removes the plug blade 5 between the other contact piece 34b and the spring piece 35 are relatively small force. The plug blade 5 can be inserted and removed.

  Further, when the plug blade 5 is inserted, the smaller contact piece 34b comes into contact with the contact blade 34a and the spring piece 35 and then comes into contact with the plug blade 5, and when the plug blade 5 is pulled out. Is separated from the plug blade 5 before the plug blade 5 is separated from the contact piece 34a and the spring piece 35. That is, when the plug blade 5 is inserted and removed, the contact piece 34b and the plug blade 5 come in contact with and separate from the contact piece 34a and the spring piece 35 while the plug blade 5 is in contact with the contact piece 34b. An arc is not generated between the blade 5 and the plug blade 5. Therefore, the contact piece 34b is not consumed by the arc, and the change with time is small. Furthermore, since the contact piece 34b is smaller than the contact piece 34a, it is difficult to be plastically deformed. As a result, the blade receiving member 6 having a relatively long life can be realized. In addition, the smaller contact piece 34b is smaller than the other contact piece 34a and has a smaller cross-sectional area of the electric path through which the current associated with the arc flows. However, no arc is generated between the contact piece 34b and the plug blade 5. Therefore, the electric current accompanying the arc does not flow through the contact piece 34b, and the temperature rise due to the electric current accompanying the arc does not occur in the contact piece 34b. Other configurations and functions are the same as those of the first embodiment.

( Reference Example 3 )
As shown in FIG. 10, the blade receiving member 6 of this configuration example is connected to the connecting piece 36 and the spring pieces 34 and 35 with the plug blade 5 inserted, as shown in FIG. 10. A pair of spring pieces 40 (third spring pieces) sandwiching the plug blade 5 in the width direction is added. That is, the pair of spring pieces 40 are positioned on both sides in the width direction of the plug blade 5 when the plug blade 5 is inserted.

In this configuration example , each of the pair of spring pieces 40 is connected to each spring piece 34 from the end portion (that is, the upper end portion in FIG. 10D) on the side where the plug blade 5 is introduced in the insertion direction of the plug blade 5. , 35 protrudes between the other spring pieces 34, 35 and the connecting piece 36. That is, the width dimension of the pair of spring pieces 40 is set to be equal to or less than the distance between the two spring pieces 34 and 35. According to the configuration of this configuration example , when the plug blade 5 is inserted, the blade receiving member 6 comes into contact with both side surfaces in the width direction and both surfaces in the thickness direction of the plug blade 5. Compared with the configuration without the blade receiving portion 6, the portion of the blade receiving member 6 that contacts the plug blade 5 becomes wider, so that the contact resistance between the blade receiving member 6 and the plug blade 5 can be reduced. It is possible to suppress the temperature rise at the portion where the contact portion 5 contacts.

  The pair of spring pieces 40 are also bent so as to protrude toward each other in the same manner as the other spring pieces 34 and 35, and the portions closest to the intermediate positions in the opposing directions are each spring. In the piece 40, when the plug blade 5 is inserted, the plug blade 5 becomes the contact protrusion 40c that first contacts. Here, the pair of spring pieces 40 are formed so as to have the contact protrusions 40 c at positions farther from the other spring pieces 34 and 35 with respect to the insertion ports 1 to 3 in the insertion direction of the plug blade 5. Yes.

  Thus, when the plug blade 5 is inserted, the pair of spring pieces 40 comes into contact with the plug blade 5 after the plug blade 5 comes into contact with the other spring pieces 34 and 35, and when the plug blade 5 is pulled out. Is separated from the plug blade 5 before the plug blade 5 is separated from the other spring pieces 34 and 35. That is, when the plug blade 5 is inserted and removed, the pair of spring pieces 40 and the plug blade 5 are brought into contact with and separated from each other while the plug blade 5 is in contact with the other spring pieces 34 and 35. An arc is not generated between the spring piece 40 and the blade 5. Therefore, the pair of spring pieces 40 are not consumed by the arc and change with time is small. As a result, the blade receiving member 6 having a relatively long life can be realized. In addition, the pair of spring pieces 40 has a smaller cross-sectional area of the electric path through which the current associated with the arc flows than the other spring pieces 34 and 35, but no arc is generated between the spring pieces 40 and the blade 5. Therefore, no current associated with the arc flows through the spring piece 40, and no temperature increase due to the current associated with the arc occurs in the spring piece 40. Other configurations and functions are the same as those of the first embodiment.

( Reference Example 4 )
In each configuration example described above, the blade receiving member 6 incorporated in the table tap is exemplified, but in this configuration example , the blade receiving member 6 used for an embedded outlet is illustrated. The configuration and function of the blade receiving member 6 that is a feature of the present configuration example are the same as those of the blade receiving member 6 of the first embodiment, and thus description thereof is omitted.

As shown in FIG. 11, the outlet of this configuration example includes a container body 43 in which two pairs of insertion ports 41 and 42 are opened so that two plugs (not shown) can be connected, and the inside of the container body 43. And a pair of terminal plates 44 each having three blade receiving members 6 for receiving plug blades 5 (see FIG. 3) of plugs inserted in the insertion ports 41 and 42. In the following description, the upper part of FIG.

  The body 43 is formed in a rectangular parallelepiped shape by a body 45 having a front opening and a cover 46 covered on the front surface of the body 45, and two sets of insertion ports 41, 42 are formed on the front surface of the cover 46. , 42 along the longitudinal direction. The body 45 and the cover 46 are joined together using a metallic attachment frame 47. Both side pieces 47a of the mounting frame 47 are provided with U-shaped projecting pieces 47b projecting rearward, and projecting portions 45a and 46a projecting on both side surfaces of the body 45 and the cover 46 are provided on the projecting pieces 47b. The body 45 and the cover 46 are coupled by being locked to the inner periphery. The attachment piece 47c facing the longitudinal direction of the attachment frame 47 has a box screw long hole 47d for attachment to an embedding box or the like, and a scissor fitting (not shown) for attachment to a gypsum board constituting the wall. Mounting holes 47e, screw holes 47f for plate screws for attaching a plate frame (not shown) or the like to the front surface, mounting screws for directly attaching the mounting frame 47 to wall materials, etc. A screw insertion hole 47g to be inserted is provided.

  The body 45 is divided into two in the width direction by partition ribs 48 formed on the center line along the longitudinal direction, thereby forming two terminal board storage chambers 49. In each terminal plate storage chamber 49, a terminal plate 44 and a locking spring 50 and a release button 51 that form so-called quick-connecting terminals together with the terminal plate 44 are stored in a fixed position.

Each terminal plate 44 has a terminal portion 52 for connecting the connecting pieces 36 of the two blade receiving members 6 between the two blade receiving members 6, and the terminal portions 52 are provided through the back surface of the body 45. It is positioned with respect to the body 45 so as to correspond to the insertion hole (not shown). Here, the lock spring 50 is inserted into the insertion hole so that an electric wire (not shown) inserted through the insertion hole from the back surface of the container body 43 can be electrically connected to the terminal portion 52 and mechanically held. The electric wire inserted through the terminal portion 52 is incorporated in a position to be sandwiched between the terminal portion 52 and the electric wire. In this configuration example , two insertion holes are formed for each terminal plate 44, and two locking springs 50 are also provided for each terminal plate 44. However, one release button 51 is provided for each of the pair of lock springs 50 arranged in the width direction of the container body 43.

( Reference Example 5 )
In this configuration example , the blade receiving member 6 provided in a switch block used for a table tap with an on / off switch for turning on / off the power for each outlet is illustrated. The configuration and function of the blade receiving member 6 that is a feature of the present configuration example are the same as those of the blade receiving member 6 of the first embodiment, and thus description thereof is omitted. However, as the connecting piece 36, as shown in FIG. 6 in the first embodiment, the ends opposite to the insertion ports in the longitudinal direction of the pair of spring pieces 34 and 35 are inserted in the insertion direction of the plug blade 5. A connecting piece 36 that is connected along the opposing direction of the two spring pieces 34 and 35 within a plane orthogonal to is adopted.

The switch block of this configuration example has a contact (not shown) in a rectangular parallelepiped housing 54 in which an operation recess 53 is provided on one surface (upper surface in the drawing). A so-called seesaw switch that opens and closes contacts by pressing each end in the longitudinal direction of the handle 55 that is movably provided is configured. The blade receiving member 6 is not housed in the housing 54, but each connecting piece 36 is connected to the side surface so as to receive the plug blade 5 (see FIG. 3) inserted in a direction orthogonal to one side surface of the housing 54. A pair is provided on the side surface in a direction to face each other. That is, the spring pieces 34 and 35 are erected on the side surface of the housing 54. Here, the pair of blade receiving members 6 are arranged in the opposing direction of the two spring pieces 34 and 35. In the housing 54, a surface different from the blade receiving member 6 is provided with a pair of power supply terminal portions (not shown) to which electric wires (not shown) are respectively connected, and one terminal portion is one blade. The other terminal portion is electrically connected to the other blade receiving member 6 through a contact point.

  The switch block configured as described above is housed in a body (not shown) such as a table tap, and the position of the blade receiving member 6 is fixed in the body so as to correspond to the insertion port of the body. . Here, in order to make the handle 55 operable, an operation window for exposing the handle 55 is opened in the body. With this configuration, the plug blade of the plug of the electric device can be connected to the blade receiving member 6 through the insertion port of the device body, and the electric device is energized by operating the handle 55 exposed from the device body. Can be turned on and off.

It is a perspective view which shows the terminal board provided with the blade receiving member of Embodiment 1 of this invention. It is a disassembled perspective view which shows the table tap using the blade receiving member same as the above. It is a top view of a terminal board same as the above. It is sectional drawing of a blade receiving member same as the above. The other example of a blade receiving member same as the above is shown, (a) is a perspective view, (b) is a front view, (c) is a top view, (d) is AA sectional drawing of (c). It is a perspective view which shows the further another example of a blade receiving member same as the above. The other example of a blade receiving member same as the above is shown, (a) is a top view and (b) is a perspective view. It is a perspective view which shows the terminal board provided with the blade receiving member of the reference example 1 of this invention. The blade receiving member of the reference example 2 of this invention is shown, (a) is a perspective view, (b) is a front view, (c) is a side view. The blade receiving member of the reference example 3 of this invention is shown, (a) is a perspective view, (b) is a front view, (c) is a top view, (d) is a side view. It is a disassembled perspective view which shows the outlet socket using the blade receiving member of the reference example 4 of this invention. It is a perspective view which shows the switch block using the blade receiving member of the reference example 5 of this invention. It is a disassembled perspective view which shows a prior art example.

Explanation of symbols

1-3 Inserts 4 Container 5 Plug blade 6 Blade receiving member 34 (First) spring piece 34a, 34b Contact piece 34c Contact projection 35 (Second) Spring piece 35c Contact projection 36 Connection piece 37 Slit Groove 38 fitting hole 39 fitting projection 40 (third) spring piece 43 body

Claims (2)

A first spring piece made of a metal plate, a second spring piece made of a metal plate and disposed opposite to each other in the thickness direction, a first spring piece and a second spring piece The first spring piece has a plug blade inserted from an insertion port opened at a position corresponding to a position between the first and second spring pieces in the container. A blade receiving member that is electrically connected to the plug blade by being sandwiched between the first spring piece and the second spring piece, and the first spring piece is on the side farther from the insertion port in the direction in which the plug blade is inserted. Is cut and raised toward the second spring piece so that the end opposite to the insertion port is the tip, and constitutes the first contact piece, in the direction in which the plug blade is inserted some of the insertion port side constitutes a second contact piece, the first and second contact piece, between the second spring pieces are arranged in the direction in which the plug pins are inserted Each plug connector, wherein the clamping Soo benzalkonium individual blade. The first and second contact pieces are formed such that the first contact piece has a smaller facing area with the second spring piece than the second contact piece, and from the insertion port. Each has a contact protrusion that protrudes in a direction to reduce the distance from the second spring piece so as to contact the inserted blade, and the first contact piece is a direction in which the blade is inserted. The insertion connector according to claim 1, further comprising an abutting protrusion at a position farther from the insertion port than the second contact piece .

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