JP2017204396A - Terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clarify the contact position with a mating terminal, while eliminating of wobbling of the mating terminal.SOLUTION: A terminal 10 includes a body 21 having a first wall (ceiling wall 25) and a second wall (bottom wall 22) disposed oppositely to the first wall, and a square cylindrical shape as a whole, an elastic contact piece 30 extending into the body 21 from the front edge or rear edge of the first wall, and having a first contact 31 provided to project to the second wall side, and displaceable in the direction receding from the second wall, and three hemispherical second contacts 40 projecting from the second wall to the first wall side in three places. The first contact 31 is disposed to be located in a triangle 42, formed by connecting three second contacts 40, when projected to the second wall side.SELECTED DRAWING: Figure 1

Description

  The technique disclosed by this specification is related with a terminal.

  2. Description of the Related Art Conventionally, a female terminal fitting described in, for example, Japanese Patent Application Laid-Open No. 2001-210417 (Patent Document 1 below) is known as a terminal in which a bead and a spring are provided inside a main body having a rectangular tube shape. This female terminal fitting has a main body formed in a rectangular box shape elongated in the front-rear direction. A tongue piece is formed to extend from the tip of the bottom wall of the main body, and this tongue piece is folded back into a mountain shape into the main body to form an elastic contact piece. On the other hand, an elongated bead is formed in the front-rear direction on the ceiling plate of the main body. When the tab of the mating male terminal fitting is inserted into the main body of the female terminal fitting, the elastic contact piece presses the back surface of the tab from below, and accordingly, the surface of the tab is pressed against the bead. The central portion in the length direction of the bead is formed to be curved in an arc shape so as to escape upward, and both ends of the curved portion are protruding portions. Therefore, the surface of the tab is pressed against the two protruding portions at the front and rear.

JP 2001-210417 A

  In the female terminal fitting described above, each bead is provided with a pair of protrusions, so that the surface of the tab is ideally pressed against the four protrusions. However, in reality, the height of the bead has a certain degree of variation, so that the bead does not necessarily contact at four places, and only three of the four places come into contact. In this case, the position of the contact with the tab of the male terminal fitting is not clearly determined, which is not preferable from the viewpoint of electrical connection.

  The terminal disclosed by this specification has a 1st wall part and the 2nd wall part arrange | positioned facing the said 1st wall part, and the main-body part which makes a square cylinder shape as a whole, A first contact extending from the front or rear edge of the one wall portion into the main body and projecting toward the second wall, the first contact being separated from the second wall; An elastic contact piece that is displaceable in a direction, and three second contacts that project from the second wall portion to the first wall portion side and that are provided at three locations, and have a hemispherical shape. When projected onto the second wall portion side, it is arranged so as to be positioned inside a triangle formed by connecting the three second contacts.

  According to such a configuration, when the mating terminal is fitted in the main body, the mating terminal is sandwiched between the first contact of the elastic contact piece and the three second contacts on the second wall side. Become. At this time, since the first contact is located inside a triangle formed by connecting the three second contacts, a three-point contact in which the counterpart terminal contacts the three second contacts by the force received from the first contact. , The contact position becomes clear.

  Also, even if the second terminal side temporarily becomes two-point contact due to wobbling of the other terminal, the two-point contact is in an unstable state, and inevitably tries to return from an unstable state to a stable state. Therefore, it returns to the three-point contact again. As a result, the wobbling of the counterpart terminal can be eliminated.

The terminal disclosed by this specification is good also as the following structures.
The main body portion includes a third wall portion that connects one side edge of the first wall portion and one side edge of the second wall portion, and at least one of the two second contacts. The second contact point may be arranged closer to the third wall portion.
According to such a configuration, since the separation distance between the second contact and the first contact disposed closer to the third wall portion can be increased, the rotational moment required to rotate the mating terminal increases, and the mating terminal It becomes easy to prevent the wobble itself.

The main body has a fourth wall connecting the other side edge of the first wall and the other side edge of the second wall, and at least one of the second contacts The second contact may be arranged closer to the fourth wall.
According to such a configuration, since the separation distance between the second contact and the first contact disposed closer to the fourth wall portion can be increased, the rotational moment required to rotate the mating terminal increases, and the mating terminal It becomes easy to prevent the wobble itself.

  According to the terminal disclosed in the present specification, the contact position with the mating terminal can be clarified, and wobbling of the mating terminal can be eliminated.

Terminal perspective view Terminal plan Bottom view of terminals Terminal side view The perspective view which notched and showed a part of FIG. Front view of terminal BB sectional view in FIG. Sectional drawing which showed the state by which the other party terminal was inserted in the main-body part from the state of FIG. AA line sectional view in FIG. Sectional drawing which showed the state by which the other party terminal was inserted in the main-body part from the state of FIG.

<Embodiment>
The embodiment will be described with reference to the drawings of FIGS. As illustrated in FIG. 1, the terminal 10 according to the present embodiment includes a terminal connection portion 20 connected to the mating terminal 60 and a wire connection portion 50 provided continuously behind the terminal connection portion 20. ing. The terminal 10 is a female terminal, and a mating terminal 60 that is a male terminal having a flat tab shape can be fitted into the terminal connecting portion 20 and can be connected. In the following description, the connecting direction of the terminal 10 and the mating terminal 60 is the front-rear direction, the side to which the mating terminal 60 is connected is the front side, and the vertical and horizontal directions will be described with reference to FIG.

  The electric wire connection portion 50 has a flat plate shape, and a core wire of an electric wire (not shown) can be welded to the upper surface of the electric wire connection portion 50 by welding means such as resistance welding. In the present embodiment, the core wire of the electric wire is connected to the electric wire connecting portion 50 by welding, but the electric wire core wire may be connected to the electric wire connecting portion by crimping.

  The terminal connection portion 20 has a main body portion 21 that has a rectangular tube shape as a whole. The main body 21 includes a bottom wall 22, a left side wall 23 configured to rise upward from the left side edge of the bottom wall 22, a right side wall 24 configured to rise upward from the right side edge of the bottom wall 22, and the left side wall 23 A ceiling wall 25 extending rightward from the upper edge and an opening preventing wall 26 extending leftward from the upper edge of the right wall 24 along the upper surface of the ceiling wall 25 are configured. In other words, the left side wall 23 connects the left side edge of the bottom wall 22 and the left side edge of the ceiling wall 25, and the right side wall 24 connects the right side edge of the bottom wall 22 and the right side edge of the ceiling wall 25. .

  The opening prevention wall 26 prevents the ceiling wall 25 from opening upward by pressing the right end of the ceiling wall 25 from above. In addition, a locking hole 27 is provided at the corner of the opening prevention wall 26 and the right side wall 24. A locking piece 28 provided at the right end of the ceiling wall 25 is fitted in the locking hole 27. Since the locking piece 28 is locked to the hole edge of the locking hole 27, the ceiling wall 25 is prevented from moving in the front-rear direction.

  As shown in FIG. 6, the ceiling wall 25 is positioned above the bottom wall 22, and the ceiling wall 25 and the bottom wall 22 are arranged in parallel so as to face each other. A part of the ceiling wall 25 protrudes downward, and this protruding portion is an excessive deflection preventing portion 29. The excessive deflection preventing portion 29 serves to prevent the elastic contact piece 30 described below from being excessively bent toward the ceiling wall 25 and plastically deforming. If the elastic contact piece 30 tries to bend excessively, the upper surface of the elastic contact piece 30 comes into contact with the lower surface of the excessive deflection preventing portion 29 in a surface contact state, so that even if a strong force is applied, the force is dispersed over a wide range. It is possible to prevent the elastic contact piece 30 from being excessively bent.

  As shown in FIG. 7, the elastic contact piece 30 is folded back into the main body portion 21 from the rear edge of the ceiling wall 25 and extends forward. The elastic contact piece 30 has a substantially mountain shape as a whole, and a first contact 31 is provided on the lower end portion of the elastic contact piece 30 so as to protrude downward. The first contact 31 is located near the front end of the elastic contact piece 30 and is located slightly in front of the above-described excessive deflection preventing portion 29. The elastic contact piece 30 can be displaced in a direction in which the first contact 31 is separated from the bottom wall 22 by the first contact 31 riding on the upper surface of the counterpart terminal 60 when the counterpart terminal 60 is inserted into the main body 21. It is said that.

  As shown in FIG. 6, the elastic contact piece 30 and the excessive deflection preventing portion 29 are formed over almost the entire width of the ceiling wall 25. For this reason, when the elastic contact piece 30 contacts the excessive deflection preventing portion 29, the elastic contact piece 30 contacts the excessive deflection preventing portion 29 over the entire width. Thereby, for example, when the mating terminal 60 enters the main body portion 21 in an oblique direction, the elastic contact piece 30 can be prevented from being pushed upward and plastically deformed.

  As shown in FIG. 6, the bottom wall 22 is provided with three second contacts 40 having a hemispherical shape protruding upward. As shown in FIG. 5, the second contact 40 is disposed so as to be positioned at each vertex of the equilateral triangle. Of the three second contacts 40, the two second contacts 40 are located on the front end side of the bottom wall 22 and are arranged side by side in the left-right direction. The second contact 40 located on the left side of the pair of second contacts 40 located on the front side is disposed near the left side wall 23, and the second contact 40 located on the right side is disposed near the right side wall 24. It is installed. For this reason, a sufficient separation distance is secured between the pair of left and right second contacts 40 and the first contact 31 located on the front side, so that the mating terminal 60 rotates around the first contact 31. It is devised so that the necessary rotational moment increases as much as possible.

  On the other hand, as shown in FIG. 3, one second contact 40 located on the rear side among the three second contacts 40 is located substantially at the center of the bottom wall 22. As shown in FIG. 6, the second contact 40 on the rear side is located in the middle of the two second contacts 40 on the front side in the left-right direction.

  Now, as shown in FIG. 7, the region FR1 occupying the first contact 31 in the front-rear direction is the region FR2 from the front end of the second contact 40 located on the front side to the rear end of the second contact 40 located on the rear side. It is supposed to be located within the range. As shown in FIG. 8, when the mating terminal 60 is pushed down when the mating terminal 60 is inserted into the main body 21 and the first contact 31 rides on the top surface of the mating terminal 60. This means that the terminal 60 is supported by two second contacts 40 at the front and rear. In this way, even if the front end of the mating terminal 60 is tilted upward or downward, the wobbling of the mating terminal 60 can be eliminated because it is corrected to the original horizontal attitude.

  Further, as shown in FIG. 9, the region LR1 occupying the left and right direction of the first contact 31 is within the range of the region LR2 from the left end of the second contact 40 located on the left side to the right end of the second contact 40 located on the right side. It is supposed to be located in As shown in FIG. 10, when the mating terminal 60 is pushed downward when the mating terminal 60 is inserted into the main body 21 and the first contact 31 rides on the upper surface of the mating terminal 60, This means that the terminal 60 is supported by the second contacts 40 at the two left and right positions. In this way, even if the left end of the mating terminal 60 is tilted upward or downward (or the right end of the mating terminal 60 is tilted upward or downward), the original horizontal posture is corrected. The wobbling of the mating terminal 60 can be eliminated.

  In FIG. 3, a point indicated by reference numeral 32 is a point obtained by projecting the apex 32 of the first contact 31 to the bottom wall 22 side, and is hereinafter referred to as a projection point 33. A broken line indicated by reference numeral 42 is a triangle connecting the vertices 41 of the three second contacts 40. At this time, the projection point 32 is located inside the triangle 42, and the first contact 31 is disposed so as to take such a position. Further, when the counterpart terminal 60 is inserted into the main body 21 and the first contact 31 rides on the upper surface of the counterpart terminal 60, the position of the projection point 32 moves slightly forward and is positioned approximately at the center of the triangle 42. It is like that. In this way, when the mating terminal 60 is pushed into the bottom wall 22 by the force received from the first contact 31, the mating terminal 60 is necessarily supported by the three second contacts 40. For this reason, the counterpart terminal 60 is always elastically sandwiched between the apex 32 of the first contact 31 and the apexes 41 of the three second contacts 40, and the contact position can be clarified. .

  As described above, in the present embodiment, when the mating terminal 60 is fitted in the main body 21, the first contact 31 of the elastic contact piece 30 and the three second contacts on the second wall (bottom wall 22) side. The counterpart terminal 60 is sandwiched between the terminal 40 and the terminal 40. At this time, since the first contact 31 is located inside a triangle 42 formed by connecting the three second contacts 40, the mating terminal 60 contacts the three second contacts 40 by the force received from the first contact 31. The contact point position becomes clear.

  Further, even if the counterpart terminal 60 wobbles and the second contact 40 side temporarily becomes two-point contact, the two-point contact is in an unstable state, and inevitably changes from an unstable state to a stable state. Since it tries to return, it will return to a three-point contact again. As a result, the wobbling of the mating terminal 60 can be eliminated.

The main body 21 has a third wall (left wall 23) that connects one side edge of the first wall (left edge of the ceiling wall 25) and one side edge of the second wall (left edge of the bottom wall 22). ) And at least one second contact 40 of the three second contacts 40 may be disposed closer to the third wall portion.
According to such a configuration, the distance between the second contact 40 and the first contact 31 disposed closer to the third wall can be increased, so that the rotational moment necessary to rotate the mating terminal 60 increases. It becomes easy to prevent wobbling of the counterpart terminal 60 itself.

The main body 21 has a fourth wall (the right side wall 24) that connects the other side edge (the right side edge of the ceiling wall 25) of the first wall part and the other side edge (the right side edge of the bottom wall 22) of the second wall part. ) And at least one second contact 40 of the three second contacts 40 may be disposed closer to the fourth wall portion.
According to such a configuration, the separation distance between the second contact 40 and the first contact 31 disposed closer to the fourth wall can be increased, so that the rotational moment required to rotate the mating terminal 60 is increased. It becomes easy to prevent wobbling of the counterpart terminal 60 itself.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
(1) In the above-described embodiment, the rectangular cylindrical main body portion 21 including four wall portions is illustrated, but other forms may be used as long as the main body portion includes the first wall portion and the second wall portion. It is good also as a rectangular tube-shaped main-body part which consists of two wall parts.

  (2) In the above embodiment, of the three second contacts 40, two second contacts 40 are arranged on the front side, one second contact is arranged on the front side, and the remaining two second contacts are arranged. It may be arranged on the rear side.

  (3) In the above embodiment, one second contact 40 of the three second contacts 40 is disposed closer to the left side wall 23, but two second contacts may be disposed closer to the left side wall 23. Good.

  (4) In the above embodiment, one second contact 40 of the three second contacts 40 is disposed closer to the right side wall 24, but two second contacts may be disposed closer to the right side wall 24. Good.

  (5) In the above embodiment, the elastic contact piece 30 is provided so as to be folded back from the rear edge of the ceiling wall 25 into the main body 21, but is elastically contacted so as to be folded back from the front edge of the ceiling wall 25 into the main body 21. A piece may be provided, or an elastic contact piece may be provided on the bottom wall 22 side.

10 ... terminal 21 ... main body 22 ... bottom wall (second wall)
23 ... Left side wall (third wall)
24 ... right side wall (fourth wall)
25 ... Ceiling wall (first wall)
DESCRIPTION OF SYMBOLS 30 ... Elastic contact piece 31 ... 1st contact 32 ... Projection point 40 ... 2nd contact 42 ... Triangle 60 ... Mating terminal

Claims (3)

A main body portion having a first wall portion and a second wall portion disposed to face the first wall portion, and having a rectangular tube shape as a whole;
A first contact extending from the front or rear edge of the first wall into the main body and projecting toward the second wall; the first contact from the second wall; An elastic contact piece that is displaceable in a separating direction;
Three locations that protrude from the second wall portion to the first wall portion side and are provided with three hemispherical shapes;
The first contact is a terminal disposed so as to be positioned inside a triangle formed by connecting the three second contacts when projected onto the second wall side.   The main body portion includes a third wall portion that connects one side edge of the first wall portion and one side edge of the second wall portion, and at least one of the two second contacts. The terminal according to claim 1, wherein the second contact is disposed closer to the third wall portion.   The main body has a fourth wall connecting the other side edge of the first wall and the other side edge of the second wall, and at least one of the second contacts The terminal according to claim 2, wherein the second contact is disposed closer to the fourth wall portion.

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