JP2005209518A - Female terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a female terminal which can improve contact reliability by securing numerous contacts even when a male tab is vibrated. <P>SOLUTION: When a pair of pinching plates 21, 22 installed at a pinching member 20 pinch a belt shaped male tab 30 along the thickness direction, rear side protrusions 24c, 24d and front side protrusions 24a, 24b contact with the male tab 30. At this time, because the rear side gap size Db is set larger than front side gap size Da, a stable contact can be obtained. Furthermore, since respective rear side protrusions 24c, 24d and respective front side protrusions 24a, 24b are arranged at the position where they do not face each other, at least two points or more of contact can be secured, and the stable contact can be obtained even if the male tab 30 is inserted in a state of being shifted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a female terminal, for example, a female terminal that conducts electricity by sandwiching a band-shaped male tab.

Conventionally, a female terminal as shown in FIG. 9 is known (see, for example, Patent Document 1).
That is, in the female terminal 100, the main body 101 is provided with the first and second contact pieces 102a and 102b, and the insertion direction of the male tab 110 is provided in the first and second contact pieces 102a and 102b. A pair of convex portions 103a, 103b, 104a, and 104b are formed at the two locations. The interval a1 between the top surfaces of one of the convex portions 103a and 103b and the interval b1 between the top surfaces of the other convex portions 104a and 104b are set to satisfy a1 <b1.
Accordingly, during normal operation, one of the convex portions 103a and 103b and the male tab 110 are reliably in contact with each other. On the other hand, when the top surface portions of the convex portions 103a and 103b disappear due to vibration or the like, contact between the other convex portions 104a and 104b and the male tab 110 is ensured.
As a result, the lifetime can be extended and the reliability can be improved.
Japanese Patent Laying-Open No. 2003-317843 (FIG. 1)

By the way, in such a female terminal 100, the protrusions 103a, 103b, 104a, and 104b are formed on the contact pieces 102a and 102b. However, the contact point is usually in contact with the male tab 110 at one point, and this one point disappears. In this case, a new contact is made at another point.
For this reason, the tab wobbling of the male tab 110 centering on the convex portions 103a, 103b, 104a, 104b is likely to occur, and there is a disadvantage that stable contact cannot be obtained. Further, in the case of a1 = b1 in FIG. 9, only the innermost contact can be contacted, and even if a plurality of convex portions 103a, 103b, 104a, 104b are formed on the contact pieces 102a, 102b, Will not work.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a female terminal capable of improving contact reliability by securing a large number of contact points even when a male tab vibrates. It is to provide.

  1) In order to achieve the above-described object, the female terminal according to the present invention has a pair of sandwiching plates extending along the insertion direction of the male tab in order to sandwich the strip-shaped male tab along the thickness direction. U-shaped clamping members, a box portion for accommodating the clamping members, and a rear side protruding portion that protrudes in a direction approaching each other from the respective clamping plates and is provided along the longitudinal direction of each clamping plate And a front-side protruding portion, and a rear-side clearance between the back-side protruding portions is set to be larger than a front-side clearance between the front-side protruding portions. Part and each said front side protrusion part are arrange | positioned in the position which does not oppose each other.

In the female terminal configured as described above, when the pair of clamping plates provided on the clamping member clamps the belt-shaped male tabs in the thickness direction, the inner terminals are provided on the opposing surfaces of the clamping plates. The side protrusion and the front protrusion contact the male tab.
At this time, since the back side gap dimension is set to be larger than the near side gap dimension, in a state where the male tab is completely inserted, all the projecting portions contact the male tab, and stable contact can be obtained. . Moreover, since each back side protrusion part and each near side protrusion part are arrange | positioned in the position which does not mutually oppose, even if it inserts in the state which a male tab swung, at least 2 points | pieces or more protrusion part which contacts is ensured. And stable contact can be obtained.

  2) Further, the female terminal according to the present invention is characterized in that a follow-up means capable of following the movement of the male tab is provided by the clamping member.

  In the female terminal configured as described above, the clamping member is provided so as to be swingable by the follow-up means. Therefore, even if the male tab vibrates, the vibration is absorbed and wear of the male tab and the protruding portion can be suppressed. .

  According to the present invention, even when a plurality of convex portions are formed on a conventional contact piece, the problem that the convex portion does not function as a contact point when the male tab touches can be solved. Even if it is inserted, at least two or more protruding portions that come into contact with each other can be secured, and stable contact can be obtained.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 is a cross-sectional view showing a first embodiment of the female terminal according to the present invention. FIG. 2 is a cross-sectional view taken along line II in FIG. 3, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 4 is a perspective view cut along the IV-IV position in FIG. 3, FIG. 5 is an explanatory view showing the arrangement and spacing of the upper and lower protrusions, and FIGS. 6 (A) and (B) are Explanatory drawing which shows the example of arrangement | positioning of a protrusion part, FIG. 7 (A)-(D) is explanatory drawing which shows the state which clamps a male tab.

As shown in FIG. 1, the female terminal 10 </ b> A according to the first embodiment of the present invention has a box part 11 having a rectangular cross section, for example. Inside the box portion 11, there is a holding member 20 having a spring property for holding the belt-like male tab 30 (see FIG. 6) along the thickness direction (vertical direction in FIG. 1). The back end (right side in FIG. 1) end portion of the clamping member 20 is supported by the box portion 11 by the support portion 20A.
Therefore, the front side (left side in FIG. 1) of the clamping member 20 can swing in the Y-axis direction.

The supporting member 20A is also a follower that can follow the movement of the male tab, supports the holding member 20 in a state in which the movement of the holding member 20 in the Z-axis direction accompanying the movement of the male tab 30 is allowed, and holds the holding member 20 and the box portion 11. Continuation with.
In addition, although the clamping member 20 and the box part 11 can be integrally manufactured by cutting and raising which cuts and bends one metal plate, they can be separately formed and connected.

The box portion 11 is formed with introduction portions 12a and 12b formed by folding the front side end portions of the top plate 11U and the bottom plate 11B toward the center, and the male tab 30 is inserted between the introduction portions 13a and 13b. An opening 13 is provided. Therefore, the height of the opening 13 is larger than the thickness dimension of the male tab 30.
On the back side of the box part 11, a crimping part 15 that electrically connects the electric wire 14 and the clamping member 20 is provided.

The clamping member 20 is formed by connecting a pair of clamping plates 21, 22 extending in the insertion direction (right direction in FIG. 1) of the male tab 30 in a substantially U shape with a coupling portion 23. The front end portions 21 a and 22 a of 21 and 22 are provided so as to be located outside the opening 13.
Thereby, the male tab 30 can be easily inserted between the upper and lower clamping plates 21 and 22 from the opening 13. Each sandwiching plate 21, 22 is provided with a plurality of projecting portions 24 along the longitudinal direction of each sandwiching plate 21, 22 while projecting in a direction approaching each other.

Of the protrusions 24, the protrusions 24 provided on the most front side of the sandwiching plates 21 and 22 are the front protrusions 24 a and 24 b, and the protrusions 24 provided on the innermost side of the sandwiching plates 21 and 22. , The rear side gap dimension Db between the rear side protrusion parts 24c, 24d is set larger than the front side gap dimension Da between the front side protrusion parts 24a, 24b, as shown in FIG. ing.
The near side gap dimension Da is set smaller than the thickness dimension D of the male tab 30 in order to sandwich the male tab 30. That is, a relationship of Da <D <Db is established.

In addition, each protrusion part 24 of the upper and lower clamping plates 21 and 22 is arrange | positioned in the position which is not mutually opposed.
For example, as shown in FIG. 6A, a plurality of projecting portions 24 are provided at equal intervals in each sandwiching plate 21, 22, but the projecting portion 24a of the upper sandwiching plate 21 and the lower sandwiching plate 22 are provided. The projecting portion 24b is displaced from the upper projecting portion 24b so that the upper projecting portion 24 and the lower projecting portion 24 are not opposite to each other.
Alternatively, as shown in FIG. 6B, the projections 24 of the upper clamping plate 21 are provided at an α1 pitch, the projections 24 of the lower clamping plate 22 are provided at an α2 pitch, and the upper projection 24 and the lower side The protruding portion 24 may not be in a position facing the protruding portion 24.

A state in which the male tab 30 is inserted into the female terminal 10A configured as described above will be described.
When the male tab 30 is inserted into the female terminal 10A from the opening 13 as shown in FIG. 7A, the male tab 30 is held between the introduction parts 12a and 12b of the box part 11 as shown in FIG. 20 inside.
At this time, in the clamping member 20, the near side gap dimension Da on the near side (opening 13 side) is smaller than the thickness dimension D and the back side gap dimension Db of the male tab 30, so that the male tab 30 is springy. The two sandwiching plates 21 and 22 are entered while being expanded.

  And in the state which insertion of the male tab 30 was completed as shown in FIG.7 (C), since all the protrusion parts 24 contact and support the male tab 30, it can support stably. In this state, when the male tab 30 swings as shown in FIG. 7D, when the swing amount is small, the clamping member 20 also swings following the male tab 30 due to the spring property of the both clamping plates 21 and 22. To do. Further, when the deflection amount is increased to some extent, the male tab 30 is inclined with respect to the sandwiching plates 21 and 22, but even in this state, the protrusions 24 at two or more points (three points in FIG. 7D) are in contact with each other. Yes.

As described above, according to the female terminal 10A described above, the protruding portion 24 that contacts and holds the male tab 30 is disposed at a position that does not oppose the upper and lower clamping plates 21 and 22. Even if it is, it will be held at three or more locations in the longitudinal direction. For this reason, a contact with the male tab 30 can be ensured and contact reliability can be improved.
Further, since the holding member 20 is supported by the support portion 20A so as to be movable, the holding member 20 moves and swings when the male tab 30 held by the holding member 20 swings. For this reason, even if the male tab 30 swings, the male tab 30 can be reliably held, and electrical connection can be maintained and vibration can be absorbed.

Next, FIG. 8 shows a female terminal 10B according to the second embodiment. In addition, the same code | symbol is attached | subjected to the site | part which is common in 10 A of female terminals concerning 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.
In the female terminal 10A according to the above-described embodiment, the holding member 20 is supported by the support portion 20A so as to be movable with respect to the box portion 11, and when the inserted male tab 30 swings, the holding member 20 is male. In this female terminal 10B, the clamping member 20 is firmly fixed to the box part 11, and the movement in the Z-axis direction and the Y-axis between the box part 11 and the caulking part 14 are fixed. For example, an attachment member 16 having a bellows structure capable of swinging in the direction is provided.
Thereby, since the box part 11 is connected with respect to the crimping | crimped part 14, it can move and rock | fluctuate, and the clamping member 20 and the box part 11 move and rock | fluctuate following the vibration of the male tab 30 integrally. Thus, as in the case described above, contact with the male tab 30 can be ensured.

The female terminal of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
That is, in each of the embodiments described above, the sandwiching plates 21 and 22 are formed in a corrugated plate shape, and the peaks and valleys thereof are the protruding portions 24. However, the flat sandwiching plates 21 and 22 are provided with protrusions. You can also

It is sectional drawing which shows 1st Embodiment which concerns on the female terminal of this invention. It is sectional drawing of the II-II position in FIG. It is sectional drawing of the III-III position in FIG. It is the perspective view cut | disconnected in the IV-IV position in FIG. It is explanatory drawing which shows the space | interval of an up-and-down protrusion part. (A) And (B) is explanatory drawing which shows the example of arrangement | positioning of a protrusion part. (A)-(D) are explanatory drawings which show the contact state of the clamping board and male tab when inserting a male tab into a female terminal, and when the inserted male tab shakes. It is sectional drawing which shows the female terminal which concerns on 2nd Embodiment. It is sectional drawing which shows the conventional female terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Female terminal 11 Box part 20 Clamping member 20A Support part (follow-up means)
21 and 22 Clamping plates 24a and 24b Front side protrusions 24c and 24d Back side protrusions 30 Male tab Db Back side clearance dimension Da Front side clearance dimension

Claims (2)

A sandwiching member in which a pair of sandwiching plates extending in the insertion direction of the male tab are connected in a substantially U shape in order to sandwich the strip-shaped male tab along the thickness direction;
A box that houses the clamping member;
A rear side protruding portion and a front side protruding portion provided along the longitudinal direction of each holding plate and protruding in a direction approaching each other from each holding plate,
A female terminal in which the back side gap dimension between the back side protrusions is set larger than the front side gap dimension between the front side protrusions,
The female terminal, wherein each of the rear side protrusions and each of the front side protrusions are disposed at positions that do not face each other.   2. The female terminal according to claim 1, wherein follower means capable of following the movement of the male tab is provided on the clamping member.

Images