JP2016018700A - Press-contact terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press-contact terminal improved in peeling property of coating and connection reliability.SOLUTION: A cable of which the cross section in a view in a direction of extension is rectangular, is inserted between a pair of holders 12, so that the press-contact terminal is connected to the cable by press-contact. The pair of holders 12 include a pair of planar opposite surfaces 14 which are arranged oppositely to each other while extending from a front side to a deep side in a direction of insertion, and are formed so as to be communicated at the deep side. Each of the pair of opposite surfaces 14 includes: a proximate part 12A1 which is provided at the deep side in the direction of insertion and is proximate to the inserted cable and at least partially brought into contact with a cable 30; and an angular part 14A which is provided at a front side of the proximate part 12A1 in the direction of insertion. In both states before and after the cable is press-contacted between the pair of holders 12, for the proximate parts 12A1 in the pair of opposite surfaces 14, an interval W1 in a portion at the front side in the direction of insertion is made equal to or smaller than an interval W2 in a portion at the deep side in the direction of insertion.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a press contact terminal.

  2. Description of the Related Art Conventionally, there is known a press contact terminal that is connected to a wire by press contact when the wire is inserted between a pair of sandwiching pieces. For example, Patent Document 1 below discloses a press contact terminal including a press contact blade having a U-shaped groove in which a sharp blade portion is opposed to the inside. In this press contact terminal, when the magnet wire, which is an electric wire, is inserted into the groove of the press contact blade, the insulating coating of the magnet wire is cut by the blade portion, and the press contact blade comes into pressure contact with the conductor wire of the magnet wire. ing.

JP 2001-160428 A

  However, in the press contact terminal disclosed in Patent Document 1, since the tip of the sharp blade portion is wedged on the conductor wire of the magnet wire, the press contact blade is pressed against the conductor wire of the magnet wire. A sufficient contact area between the wires cannot be secured, and the contact resistance may increase. For this reason, there exists a possibility that the connection reliability between a press-contact blade and a conductor wire cannot fully be ensured.

  Therefore, in the press contact terminal disclosed in Patent Document 1, it is conceivable to make the contact portion with the conductor wire planar in order to ensure the contact area between the press contact blade and the conductor wire. However, when the contact portion with the conductor wire is flat like this, when the pair of holding pieces are opened by narrowing the magnet wire into the groove of the press contact terminal, the insulation coating of the magnet wire comes into contact The insulation coating may get caught by the pair of sandwiching pieces. In this case, there is a possibility that even if the magnet wire is narrowly inserted into the groove of the press contact terminal, the insulation coating cannot be sufficiently removed.

  The present invention has been created in view of the above problems, and an object of the present invention is to provide a press contact terminal excellent in stripping property and connection reliability.

  The technology disclosed in the present specification is such that an electric wire having a rectangular cross section viewed from the extending direction is inserted between a pair of sandwiching pieces in a direction perpendicular to the extending direction. It is a press-contact terminal connected by press-contact, Comprising: A pair of said clamping piece has a pair of planar opposing surface distribute | arranged opposingly in the form extended from the near side of the said insertion direction to the back | inner side In addition, each of the pair of facing surfaces is provided on the back side in the insertion direction, and is close to the inserted electric wire and at least a part thereof is in contact with the electric wire. A proximity portion and a corner portion provided on the near side of the proximity portion in the insertion direction, and the proximity portion on the pair of opposed surfaces is press-contacted between the pair of holding pieces. In both states, the state before being pressed and the state after being pressed, About pressure contact terminal spacing at the site of insertion direction of the front side is less distance at the site of the back side of the insertion direction.

  In the above-mentioned press contact terminal, since the pair of sandwiching pieces are formed in a shape that is continuous on the back side in the insertion direction, the electric wire having a rectangular cross section viewed from the extending direction extends between the pair of sandwiching pieces. Is inserted in a direction orthogonal to the end of the rectangular cross section of the electric wire, the front side portion of the pair of opposing surfaces is pushed, and the front side portion of the proximity portion is closer to the rear side portion of the proximity portion. Will open greatly.

  In this regard, in the above-described press contact terminal, in both the state before the wire is press-contacted between the pair of sandwiching pieces and the state after the press contact, the distance at the front portion of the proximity portion is on the back side. It is assumed that it is smaller than the interval in the part. With such a configuration, when inserting the electric wire between the pair of sandwiching pieces, even if the portion on the near side is opened wider than the portion on the far side of the proximity portion, the front side of the proximity portion The electric wire inserted from the side toward the back side is always in contact with a portion on the near side of the proximity portion, that is, the corner portion. For this reason, it is suppressed that the insulation coating of the electric wire rides on the proximity portion, and the electric wire can be effectively stripped off by the corner portion by inserting the electric wire from the near side to the back side of the proximity portion. it can.

  Furthermore, by inserting the electric wire to the back side of the proximity part, the core wire exposed to the part where the coating has been peeled off is in surface contact with a part of the proximity part of the opposing surface that is made flat. A contact area can be ensured. Thus, the above-mentioned press contact terminal is excellent in the stripping property and the connection reliability. The “corner portion” in the present specification includes not only an angle between the proximity portion and the separation portion, but also a case where a slight curvature is provided between the proximity portion and the separation portion.

  In the press contact terminal, the proximity portion on the pair of opposing surfaces may be configured such that the distance between the portions on the near side in the insertion direction and the depth in the insertion direction are in a state in which the electric wire is pressed between the pair of holding pieces. The distance to the part on the side may be equal.

  According to this configuration, since the entire surface of the proximity portion is in contact with the electric wire in a state where the electric wire is press-contacted between the pair of sandwiching pieces, the contact area between the press contact terminal and the electric wire is increased. The contact resistance between the press contact terminal and the electric wire can be reduced. For this reason, the press contact terminal can be made more excellent in connection reliability.

  According to the technique disclosed in the present specification, it is possible to provide a press contact terminal excellent in stripping property and connection reliability.

The perspective view of the press-contact terminal which concerns on Embodiment 1. FIG. Side view of pressure contact terminal 2 is an enlarged side view of the vicinity of the opposing surface. The side view which shows the state before inserting an electric wire between a pair of clamping pieces The side view which shows the state in the middle of inserting an electric wire between a pair of clamping pieces The side view which expanded the area | region enclosed with a dashed-dotted line in FIG. The side view which shows the state after inserting an electric wire between a pair of clamping pieces The side view which shows the state before inserting an electric wire between a pair of clamping pieces in the press-contact terminal which concerns on Embodiment 2. FIG. The side view which shows the state after inserting an electric wire between a pair of clamping pieces

<Embodiment 1>
The first embodiment will be described with reference to FIGS. In the embodiment, the press contact terminal 1 as an internal wiring disposed inside the motor is illustrated. As shown in FIG. 1, the press contact terminal 1 includes a sandwiching portion 10 and a terminal portion 20 extending from the sandwiching portion 10, and is connected to the wire 30 by press-contacting the end of the wire 30 to the sandwiching portion 10. The In the following description, the upper side in FIG. 1 is described above the press contact terminal 1, the lower left side in FIG. 1 is the front side of the press contact terminal 1, and the lower right side in FIG.

  The press contact terminal 1 is a member made of, for example, a copper alloy. The clamping part 10 which comprises the press-contact terminal 1 is formed by processing one metal plate, and as shown in FIG. 1, a pair of clamping pieces provided in two sets adjacent to each other in the left-right direction. 12. When the metal plate is bent, the sandwiching portion 10 is bent in a substantially U shape in plan view at the front side portion (see FIG. 4), and both end portions of the metal plate are brought close to each other at the rear side portion. .

  The pair of sandwiching pieces 12 are formed by punching the metal plate, and are arranged to face each other in the vertical direction as shown in FIG. 2, and the rear side (the back side in the insertion direction) is in the vertical direction. It is lined up. For this reason, the pair of sandwiching pieces 12 has a groove-shaped press contact groove 12A that opens to the front side, and the electric wire 30 is inserted into the press contact groove 12A from the opening so that the wire 30 is sandwiched from both the upper and lower sides. It is supposed to be. The two pairs of sandwiching pieces 12 constituting the sandwiching unit 10 have the same configuration. For this reason, below, one pair of clamping piece 12 is demonstrated. The configuration of the pair of sandwiching pieces 12 will be described in detail later.

  As shown in FIG. 1, the terminal portion 20 constituting the press contact terminal 1 has a plate shape, and its front end portion is connected to the pair of sandwiching pieces 12 and the plate surface thereof is directed in the extending direction of the electric wire 30. It extends toward the rear side from the pair of sandwiching pieces 12 in the posture. This terminal portion 20 is connected to a winding (enameled wire) in the motor by welding.

  As shown in FIG. 4, the electric wire 30 includes a core wire 32 made of a conductive wire and an insulating coating 34 that covers the core wire 32. The insulating coating 34 is made of a material excellent in oil resistance and heat resistance, such as engineering plastic. The cross section viewed from the extending direction of the electric wire 30 is substantially rectangular (see FIG. 4), and is a so-called rectangular wire. As shown in FIG. 1, the electric wire 30 is inserted between the pair of sandwiching pieces 12 along the front-rear direction of the press contact terminal 1 in a posture in which the extending direction thereof substantially matches the left-right direction of the press contact terminal 1. . Therefore, the insertion direction of the electric wire 30 substantially coincides with the front-rear direction of the press contact terminal 1.

  Then, the structure of a pair of clamping piece 12 in the press-contact terminal 1 is demonstrated. As shown in FIGS. 1 to 3, the pair of sandwiching pieces 12 are planes that are arranged so as to be opposed to each other in the vertical direction in the press contact groove 12 </ b> A so as to extend from the front side to the back side in the front-rear direction. A pair of opposing surfaces 14 are formed. As shown in FIGS. 2 and 3, the central portion of the pair of opposed surfaces 14 in the front-rear direction has a shape protruding toward the inside.

  In the protruding portions, the vertical spacing is smaller than the dimension in the short side direction of the cross section of the electric wire 30 having a substantially rectangular shape. For this reason, when the electric wire 30 is inserted into the pressure contact groove 12A, the projecting portion of the pair of sandwiching pieces 12 comes close to the electric wire 30 and a part thereof is in contact with the electric wire 30 (hereinafter referred to as the projecting portion). The part is referred to as “proximity portion 12A1”). Specifically, as shown in FIG. 3, the proximity portion 12A1 has a distance W1 in the vertical direction of a portion on the near side in the insertion direction in the state before the electric wire 30 is pressed into contact with the pressure contact terminal 1. It is made smaller than the space | interval W2 in the up-down direction of these parts.

  On the other hand, the front side portion of the pair of facing surfaces 14 has an interval in the vertical direction larger than the dimension in the short side direction of the cross section of the electric wire 30 having a substantially rectangular shape. For this reason, the front part of the pair of sandwiching pieces 12 is separated from the electric wire 30 when the electric wire 30 is inserted into the pressure contact groove 12A (hereinafter, the front part is referred to as a “separating portion 12A2”). ).

  As shown in FIG. 3, the separation portion 12A2 in the pair of facing surfaces 14 is inclined in the vertical direction so as to open outward from the boundary portion with the proximity portion 12A1 toward the front. For this reason, the boundary portion between the proximity portion 12A1 and the separation portion 12A2 (the front side in the insertion direction in the proximity portion 12A1) has a corner shape with a slight curvature (hereinafter referred to as the corner portion). Is referred to as “corner portion 14A”). The “corner portion” in this specification is not only an angle between the proximity portion 12A1 and the separation portion 12A2, but also a slight curvature between the proximity portion 12A1 and the separation portion 12A2. Shall also be included.

  Since the corner portion 14A is provided on the pair of opposed surfaces 14, when the electric wire 30 is inserted into the pressure contact groove 12A, the electric wire 30 is brought into contact with the corner portion 14A. Thereafter, the insulating coating 34 of the electric wire 30 is peeled off by the frictional force generated between the corner portion 14 </ b> A and the electric wire 30 by inserting the electric wire 30 to the back side in the insertion direction. In the press contact terminal 1 of the present embodiment, the inclination angle θ1 (see FIG. 3) of the separation portion 12A2 with respect to the proximity portion 12A1 is set to 30 ° on the pair of facing surfaces 14.

  Subsequently, a stripping aspect of the insulating coating 34 and a contact aspect of the press contact terminal 1 and the core wire 32 when the electric wire 30 is press contacted to the press contact terminal 1 according to the present embodiment will be described. When the electric wire 30 is press-contacted to the press contact terminal 1, the extending direction of the electric wire 30 is along the horizontal direction of the press contact terminal 1, and the short side direction of the cross section of the electric wire 30 having a substantially rectangular shape is along the vertical direction of the press contact terminal 1. In such a posture, the electric wire 30 is inserted into the press contact groove 12A of the pair of sandwiching pieces 12 by press fitting. Then, as shown in FIG. 4, the upper and lower end portions on one end side of the electric wire 30 directed to the press contact terminal 1 side come into contact with a part of the separation portion 12A2.

  In this state, when the electric wire 30 is further press-fitted into the pressure contact groove 12A toward the back side in the insertion direction, the pair of sandwiching pieces 12 are configured to be continuous on the back side in the insertion direction. A part of the separation portion 12A2 is pushed by the upper and lower end portions. And since the electric wire 30 is what is called a rectangular wire, when the part of separation | spacing part 12A2 is pushed, the site | part of the near side of the proximity part 12A1 will open more largely than the site | part of the back side of the proximity part 12A. . Thereafter, when the electric wire 30 is further press-fitted into the back side in the insertion direction, the electric wire 30 enters between the proximity portions 12A1 of the pair of opposed surfaces 14 as shown in FIG.

  Here, as described above, in the proximity portion 12A1, the interval W1 in the vertical direction of the portion on the near side in the insertion direction is smaller than the interval W2 in the vertical direction on the portion on the back side in the insertion direction. As shown in FIG. 6, the electric wire 30 inserted from the front side toward the back side forms an angle θ <b> 2 between a portion of the facing surface 14 that is behind the contact portion with the facing surface 14. It enters between the proximity parts 12A1.

  In addition, as shown in FIG. 7, the proximity portion 12 </ b> A <b> 1 is a portion in which the interval in the vertical direction of the portion on the near side in the insertion direction is the portion on the far side in the insertion direction even after the electric wire 30 is pressed against the pressure contact terminal 1 It is set as the shape made smaller than the space | interval in the up-down direction. For this reason, the electric wire 30 inserted from the near side of the proximity portion 12A1 toward the back side is always in contact with the corner portion 14A.

  Thus, the electric wire 30 inserted from the near side of the proximity portion 12A1 toward the back side is always in contact with the corner portion 14A, so that the electric wire 30 is placed in the press contact groove 12A as shown in FIGS. When inserted, the insulating coating 34 of the electric wire 30 is effectively stripped off by the corner portion 14A. Then, when the electric wire 30 is inserted to the back side of the proximity portion 12A1 and the electric wire 30 is press-contacted to the press contact terminal 1, as shown in FIG. 7, the core wire 32 exposed at the site where the insulating coating 34 is peeled off is formed. A surface contact is made with a part of the proximity portion 12A1 of the opposing surface 14 which is flat.

  Thereby, the contact area between the press contact terminal 1 and the core wire 32 of the electric wire 30 is ensured. Moreover, the electric wire 30 is press-fitted to the back side of the proximity portion 12 </ b> A <b> 1, so that the electric wire 30 is pressed between the pair of sandwiching pieces 12, and the press contact terminal 1 is connected to the electric wire 30.

  As described above, in the press contact terminal 1 of the present embodiment, when the electric wire 30 is inserted between the pair of sandwiching pieces 12, the front side portion opens more greatly than the back side portion of the proximity portion 12A1. The electric wire 30 inserted from the near side to the back side of the proximity portion 12A1 is always in contact with the corner portion 14A. For this reason, it is suppressed that the insulation coating 34 of the electric wire 30 rides on the proximity portion 12A1, and the electric wire 30 is inserted from the near side to the back side of the proximity portion 12A1, so that the insulation portion 34 of the electric wire is formed by the corner portion 14A. Can be effectively stripped off. Then, when the electric wire 30 is inserted to the back side of the proximity portion 12A1, the core wire 32 exposed at the site where the insulating coating 34 has been peeled off is in surface contact with a part of the proximity portion 12A1 of the opposing surface 14 that is flat. Therefore, a contact area with the core wire 32 can be ensured. Thus, the press contact terminal 1 of the present embodiment is excellent in the stripping property and connection reliability of the insulating coating 34.

  Moreover, since the press-contact terminal 1 of this embodiment is excellent in the stripping property of the insulating coating 34 as described above, even if it is the electric wire 30 having the hard insulating coating 34 excellent in oil resistance and heat resistance. The insulating coating 34 can be effectively peeled off, and connection reliability can be ensured. For this reason, the press-contact terminal 1 suitable as internal wirings, such as a motor etc. with which oil resistance and heat resistance are requested | required, can be provided.

  Further, in the press contact terminal 1 of the present embodiment, the inclination angle θ1 of the separation portion 12A2 with respect to the proximity portion 12A1 is set to 30 °. For this reason, the corner portion 14A provided at the boundary between the proximity portion 12A1 and the separation portion 12A2 becomes sharper than the configuration in which the inclination angle of the separation portion 12A2 with respect to the proximity portion 12A1 is smaller than 30 °. . As a result, when the electric wire 30 is inserted from the near side to the far side of the proximity portion, the insulating coating 34 of the electric wire 30 is further suppressed from riding on the proximity portion 12A1, and the covering of the electric wire 30 is effectively peeled off by the corner portion 14A. Can be taken.

<Embodiment 2>
Next, Embodiment 2 will be described with reference to FIGS. The press contact terminal of the present embodiment is different from that of the first embodiment in the vertical dimension of the clamping part 110. Since the other configuration is the same as that of the first embodiment, the description of the structure, operation, and effect is omitted. In FIG. 8 and FIG. 9, the parts obtained by adding the numeral 100 to the reference numerals in FIG. 4 and FIG. 7 are the same as the parts described in the first embodiment.

  In the press contact terminal of this embodiment, as shown in FIG. 8, the vertical dimension of the clamping part 110 is made smaller than that of the first embodiment. Accordingly, the distance in the vertical direction of the proximity portion 112A1 and the distance in the vertical direction of the separation portion 112A2 are both smaller than those in the first embodiment. For this reason, when the electric wire 30 is inserted into the press contact groove 112A, the upper and lower end portions on one end side of the electric wire 30 directed to the press contact terminal side are separated from the wire 30 and the separation portion 12A2 in the first embodiment in the separation portion 112A2. It contacts with the front part of the contact part (see FIG. 4) (see FIG. 8).

  And in the state which the up-and-down both ends in the one end side of the electric wire 30 contact each part of separation | spacing part 112A2, the electric wire 30 is press-fitted in the press-contact groove | channel 112A toward the back | inner side of an insertion direction, and the electric wire 30 in the one end side When a part of the separation portion 112A2 is pushed by the upper and lower end portions, the proximity portion 112A1 is opened larger than that of the first embodiment. For this reason, in the state in which the electric wire 30 is press-contacted between the pair of sandwiching pieces 112, as shown in FIG. 9, the proximity portion 112A1 has an interval in the vertical direction of a portion on the near side in the insertion direction and a back side in the insertion direction. The interval in the vertical direction of the part of is assumed to be equal,

  In the press contact terminal of the present embodiment, with the electric wire 30 being in press contact, the distance in the vertical direction is equal between the front side portion and the back side portion in the insertion direction of the proximity portion 112A1 as described above. Since the electric wire 30 is a so-called rectangular wire, the substantially entire surface of the proximity portion 112A1 is in contact with the electric wire 30. For this reason, the contact area between a pressure contact terminal and the electric wire 30 can be enlarged, and the contact resistance between a pressure contact terminal and the electric wire 30 can be reduced compared with the thing of Embodiment 1. FIG. As a result, the press contact terminal can be further improved in connection reliability.

Other modifications of the above embodiment are listed below.
(1) In each of the above-described embodiments, the configuration in which the pair of facing surfaces includes the proximity portion and the separation portion is illustrated, but the configuration in which the pair of facing surfaces include only the proximity portion may be employed. Even in this case, since the corner portion is provided on the near side in the insertion direction of the proximity portion, when the electric wire is inserted from the near side to the back side of the proximity portion, the covering of the wire is effectively peeled off by the corner portion. Can be taken.

(2) In each of the above embodiments, an example in which a slight curvature is provided at the corner is illustrated, but the corner may have a sharp shape. In this case, the strippability of the insulation coating by the corners can be further enhanced.

  As mentioned above, although each embodiment of this invention was described in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

DESCRIPTION OF SYMBOLS 1 ... Pressure contact terminal 10, 110 ... Clamping part 12, 112 ... Clamping piece 12A, 112A ... Pressure welding groove 12A1, 112A1 ... Proximity part 12A2, 112A2 ... Separation part 14, 114 ... Opposite surface 14A, 114A ... Corner part 20 ... Terminal part 30 ... Electric wire

Claims (2)

A wire terminal having a rectangular cross section viewed from the extending direction is inserted into a pair of holding pieces in a direction perpendicular to the extending direction, thereby being a pressure contact terminal connected to the wire by pressure welding. ,
The pair of clamping pieces have a pair of planar opposing surfaces arranged in an opposing manner so as to extend from the near side to the far side in the insertion direction, and have a shape continuous on the far side,
Each of the pair of facing surfaces is provided on the back side in the insertion direction, is close to the electric wire to be inserted and at least a part thereof is in contact with the electric wire, and the insertion direction of the proximity portion A corner provided on the front side of the
The proximity portion in the pair of opposed surfaces is in a portion on the near side in the insertion direction in both the state before the wire is pressed between the pair of holding pieces and the state after the wire is pressed. A press contact terminal in which the interval is equal to or less than the interval in the portion on the back side in the insertion direction.   The proximity portion on the pair of opposing surfaces is a distance between a portion on the near side in the insertion direction and a portion on the far side in the insertion direction in a state where the electric wire is pressed between the pair of holding pieces. The press contact terminal according to claim 1, wherein

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