JP5388565B2 - Female terminal structure - Google Patents

Description

  The present invention relates to a structure of a female terminal having a rectangular tube-shaped tab receiving portion into which a tab-type male terminal can be inserted.

The thing of patent document 1 is known as an example of the connector using a tab type male terminal. This type of tab-type male terminal generally has a strip-shaped tab at the tip, and a wire connecting portion that connects the terminal portion of the wire to the proximal end so that the tab is positioned on the extension line of the terminal portion. have. Some of the female terminals connected to this type of tab-type male terminal have a rectangular tube-shaped tab receiving portion into which the tab of the male terminal is inserted at the tip.
JP 2006-92779 A (FIG. 3)

  By the way, a twisted wire is often used for a normal in-vehicle cable, but when a thick twisted wire that allows a large current to flow is connected to the wire connection portion of the tab-shaped male terminal described above, However, the twisting force may act on the tab due to the return wrinkles of the core wire due to the property that the conductor is a core wire formed by twisting conductive wires. In particular, when the stranded wire is bent near the terminal, a twisting force in a direction of returning the twist to the core wire may be generated, and the force may reach the tab of the male terminal. When this torsional force is large, in the connected state of the male terminal and female terminal, the tab tilts in the tab receiving part of the female terminal and comes into contact with the inner surface of the tab receiving part. There is a problem that the contact conductivity is lowered.

  The present invention has been made in view of the above-described circumstances, and its purpose is to prevent the tabs from colliding with each other in the tab receiving portion of the female terminal in the connected state of the male terminal and the female terminal. It is possible to provide a structure of a female terminal capable of improving the contact conductivity between a male terminal and a female terminal.

In order to achieve the above-described object, the structure of the female terminal according to the present invention is characterized by the following ( 1 ).
(1) A structure of a female terminal including a rectangular tube-shaped tab receiving portion into which a strip-like tab of a male terminal can be inserted,
The tab receiving portion has a width of the one wide wall on the inner surface of one of the wide walls facing the plate surface of the tab when the tab is inserted into the tab receiving portion. Two protrusions formed at intervals in the direction, a leaf spring for pressing the inserted tab toward the protrusion on the inner surface of the other wide wall, and formed on the one wide wall A slit formed between the two protrusions and dividing the one wide wall in a direction intersecting the width direction is provided,
Each of the one wide wall divided by the cut is provided with an elastic displacement allowing portion formed so as to be elastically displaceable independently in the wall thickness direction of the wide wall ,
The elastic displacement allowing portion is formed such that the range from the upper half of the pair of left and right side walls connected to the wide wall to the cut of the one wide wall is thinner than the wall thickness of the other tab receiving portion. Formed by,
about.

According to the structure of the female terminal configured as described in (1) above, a cut is formed in the wall having two protrusions pressed against the tab of the tab receiving portion of the female terminal, and each protrusion is formed on the wall one by one. Since the wall portion is divided so as to be elastically displaceable independently on both sides of the cut, even when the tab is tilted by the twisting force of the stranded wire, the wall portion having a protrusion Can be made to follow the tab, and the tab can always be pressed against the two protrusions. Therefore, even when the tab is inclined, the tab does not come into contact with the inner surface of the tab receiving portion of the female terminal, and the contact conductivity between the male terminal and the female terminal can be improved.
In addition , the twisting force applied to the stranded wire is slight starting from the thin part of the wide wall, the thin part of the pair of left and right side walls connected to the wide wall, or the bent part where the wide wall and the side wall are connected. Even if it is a thing, each of the wide wall divided | segmented by the cut will elastically displace to the wall thickness direction of this wide wall. As a result, the deformation of the tab receiving portion due to the elastic displacement of the wide wall can be locally stopped, and the contact conductivity between the male terminal and the female terminal can be enhanced .

  According to the present invention, in the connected state of the male terminal and the female terminal, it is possible to prevent the tabs from coming into contact with each other in the tab receiving portion of the female terminal, and to improve the contact conductivity between the male terminal and the female terminal. Can do.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

  1A is a cross-sectional view of a main part of a female terminal of the connector of the embodiment, FIG. 1B is a cross-sectional view showing an enlarged configuration of a fitting portion of the female terminal and the male terminal, and FIG. FIG. 3A is a configuration diagram of a first connector including a female terminal, FIG. 3B is a configuration diagram illustrating a second connector including a male terminal and the first connector together, and FIG. It is sectional drawing which expands and shows the structure of the fitting part of an unbroken female terminal and male terminal at the time of connecting the 1st connector and the 2nd connector shown as a comparative example.

  As shown in FIG. 2, the connector of the present embodiment includes a first connector 50 that includes a female terminal 160 and a second connector 20 that includes a male terminal 30.

  As shown in FIG. 2A, the first connector 50 has a plurality of female terminals 160 attached to predetermined portions of a resin connector housing 50H. The connector housing 50H corresponds to each female terminal 160. The cylindrical fitting part 51 and the terminal receiving part 52 which were made are provided.

  The female terminal 160 of this embodiment shown in FIG. 1 and the female terminal 60 before improvement shown as a comparative example in FIG. 3 have flat rectangular tube-shaped tab receiving portions 161 and 61 at the tip as shown in FIG. And has flat wire connection portions 162 and 62 with screw through holes 162a and 62a at the base end, and tab receiving portions 161 and 61 at the distal end are formed in the cylindrical fitting portion 51 of the connector housing 50H. The female terminals 160 and 62 are provided in the connector housing 50H by inserting from the rear and placing the flat wire connection portions 162 and 62 on the terminal receiving portion 52 of the connector housing 50H in this state. Further, the terminal receiving portion 52 is provided with a screw hole 52a, and a screw passed through a terminal of an unillustrated electric wire terminal is inserted into the screw through holes 162a and 62a of the electric wire connecting portions 162 and 62 of the female terminals 160 and 60. Further, the electric wire can be electrically connected to the female terminals 160 and 60 by further tightening the screw hole 52a on the terminal receiving portion 52.

  As shown in FIG. 2B, the second connector 20 has a plurality of male terminals 30 attached to predetermined portions of a resin connector housing 20H. Each male terminal 30 is connected to the connector housing 20H. The cylindrical fitting part 21 corresponding to is provided. The cylindrical fitting portion 21 of the second connector 20 is configured to be fitted to the outer periphery of the fitting portion 51 of the first connector 50, and the fitting portions 21 and 51 of both the connectors 20 and 50 are connected to each other. By fitting, the male terminal 30 and the female terminals 160 and 60 can be electrically connected.

  Although not shown, the male terminal 30 has a strip-shaped tab 31 inserted into the tab receiving portions 161 and 61 of the female terminals 160 and 60 at the tip, and a wire connecting portion having one end portion connected to the tab 31. Have. The other end of the electric wire connecting portion (the side opposite to the side where the tab 31 is continuously provided) is positioned so that the tab 31 is positioned on the longitudinal extension line of the electric wire 1 by a joining means such as welding, crimping or caulking. It is provided so that the terminal part of the electric wire 1 can be connected.

  Further, the tab receiving portions 161 and 61 of the female terminals 160 and 60 are configured as shown in FIGS. Here, the tab receiving part 61 before improvement and the tab receiving part 161 in this embodiment are demonstrated simultaneously, referring FIG. 1 and FIG.

  The tab receiving portions 161 and 61 are formed in a flat rectangular tube shape by bending both ends in the width direction of one flat plate upward, further bending inward, and abutting the tips. Therefore, when the tab 31 is inserted, the tab receiving portions 161 and 61 are arranged such that when the tab 31 is inserted, the pair of upper and lower wide walls 161c, 161a, 61c, and 61a facing the upper and lower plate surfaces of the tab 31 are inserted. The tab 31 has a pair of left and right side walls 161b and 61b facing both side edges in the width direction.

  Of the pair of wide walls 161c, 161a, 61c, 61a of the tab receiving portions 161, 61, the inner surfaces of the upper wide walls 161c, 61c are spaced apart in the width direction of the wide walls 161c, 61c. Two protrusions 166 and 66 are provided in pressure contact with the upper plate surface of the inserted tab 31. Further, leaf springs 164 and 64 for pressing the inserted tab 31 toward the protrusions 166 and 66 are disposed on the inner surface side of the lower wide walls 161a and 61a.

  Further, at the approximate center in the width direction of the upper wide walls 161c and 61c, there are provided cut lines 161d and 61d which are divided walls having the projections 166 and 66 on both sides, respectively. The cuts 161d and 61d are butt portions at the tips when the rectangular tube-shaped tab receiving portions 161 and 60 are formed by bending a flat plate, and the butt portions are not joined to each other.

  Since the protrusions 166 and 66 and the leaf springs 164 and 64 are provided on the inner surfaces of the tab receiving portions 161 and 61 as described above, when the tab 31 is correctly inserted, the two protrusions 166 and 66 are placed on the tab 31. The side plate surface is strongly pressed. Thereby, high contact conductivity can be maintained.

  By the way, when connecting the electric wire 1 with the core wire which twisted the several conducting wire to the electric wire connection part of the male terminal 30 of the 2nd connector 20, especially when connecting the thick electric wire 1 which flows a large current The torsional force may act on the tab 31 due to the return wrinkle of the core wire. For example, when the electric wire is bent near the terminal portion, a strong twisting force in the direction of returning the twist to the core wire may occur.

  Then, since the twisting force reaches the tab 31 of the male terminal 30, the tab 31 is inclined in the tab receiving portions 161 and 61 of the female terminals 160 and 60, and in the case of the example before the improvement of FIG. The tab 31 may be separated from the projection 66 on one side as indicated by the middle P. When the tab 31 comes into contact with the inner surface of the tab receiving portion 61 in this manner, the contact conductivity between the male terminal 30 and the female terminal 60 is lowered.

  As described above, in the case of the tab receiving portion 61 before improvement shown in FIG. 3, the upper and lower wide walls 61c and 61a and the left and right side walls 61b are formed as the same wall thickness, so that the tab 31 is inclined as described above. In such a case, an inconvenient phenomenon of one piece contact may occur.

  Therefore, in the connector of the present embodiment, as shown in FIG. 1, the range from the upper half of both side walls 161b of the tab receiving portion 161 to the divided walls on both sides of the cut 161d of the upper wide wall 161c is different. By setting the wall thickness to be smaller than the wall of this part, the range set to the small wall thickness is configured as a spring part 170 that is independently elastically displaceable in the wall thickness direction. In other words, the spring portion 170 is formed as a cantilever spring based on a portion 161e curved outward of the upper half of the side wall 161b.

  As described above, the wall of the tab receiving portion 161 of the female terminal 160 having the protrusion 166 that presses against the tab 31 is configured as the spring portion 170 that can be elastically displaced independently on both sides of the cut 161d. Even when the tab 31 is tilted by the torsional force, the wall having the protrusion 166 can follow the tab 31 as shown in FIG. 1B, and the tab 31 is always pressed against the two protrusions 166. be able to. Therefore, even when the tab 31 is inclined, the tab 31 does not come into contact with the inner surface of the tab receiving portion 161 of the female terminal 160, and the contact conductivity between the male terminal 30 and the female terminal 160 can be improved.

  In particular, by setting the upper side from the upper half of the side wall 161b of the tab receiving portion 161 to be thinner than the other portions, the spring property is imparted to a wide range including the wall having the protrusion 166. The structure is simple and local deformation can be reduced.

  Although the case where all the upper side from the upper half portion of the side wall 161b of the tab receiving portion 161 is set to be thinner than the other portions has been described, the thickness of a part of the side wall 161b of the tab receiving portion 161 is set to the side wall 161b. The structure made smaller than the thickness of the other part may be sufficient. In order to realize this configuration, for example, a slit extending in the fitting direction of the male terminal 30 formed by recessing the inner or outer surface of the side wall 161b can be considered. The slit is formed by punching the inner or outer surface of the side wall 161b along the longitudinal direction of the side wall 161b. With this configuration, even if the twisting force applied to the electric wire 1 is slight starting from the thin portion of the side wall 161b, each of the wide walls 161c divided by the cuts is in the wall thickness direction of the wide wall 161c. Will be elastically displaced.

  Further, the case where a part of the side wall 161b of the tab receiving part 161 is set to be thinner than the other part of the side wall 161b has been described. However, a part of the wide wall 161c of the tab receiving part 161 is replaced with another part of the wide wall 161c. A structure in which the wall thickness is set smaller than the portion may be used. In order to realize this structure, for example, a slit extending in the fitting direction of the male terminal 30 formed by recessing the inner or outer surface of the wide wall 161c can be considered. The slit is formed by punching the inner or outer surface of the wide wall 161c along the longitudinal direction of the wide wall 161c. In this structure, even if the torsional force applied to the electric wire 1 is slight starting from a part of the wide wall 161c set to a small wall thickness, the tip of the wide wall 161c (from the part of the wide wall 161c ( The range from the cut line 161) is elastically displaced in the wall thickness direction of the wide wall 161c. Similarly, the bent portion 163 where the wide wall 161c and the side wall 161b are orthogonally coupled may be configured to have a wall thickness smaller than the thickness of the wide wall 161c and the side wall 161b. In addition, the thickness of the bent part 163 here is a point P where the inner surface of the wide wall 161c and the inner surface of the side wall 161b are orthogonal to each other in FIG. And a point Q where the outer surface of the wide wall 161c and the outer surface of the side wall 161b are orthogonal to each other (or as shown in FIG. 1A, the outer surface of the wide wall 161c and the outer surface of the side wall 161b are In the case of bending along a curve, the point closest to the point P corresponds to the point Q. The point Q is a straight line extending in the fitting direction of the male terminal 30). Such a bent portion 163 is formed by punching a portion where the wide wall 161 c and the side wall 161 b are orthogonally coupled along the longitudinal direction of the female terminal 160. In this structure, each of the wide walls 161c divided by the cuts is elastically displaced in the wall thickness direction of the wide wall 161c even if the twisting force applied to the electric wire 1 is slight with the bent portion 163 as a starting point. Will do.

  As described above, in the present embodiment, the thickness of a part of the side wall 161b or the wide wall 161c forming the tab receiving part 161 or the thickness of the bent part 163 excludes the part of the side wall 161b and the wide wall 161c. When the torsional force applied to the electric wire 1 is small, each of the wide walls 161c divided by the cuts is elastically displaced in the wall thickness direction of the wide wall 161c. In addition, the thin part which makes the wide wall 161c divided | segmented by the cut | disconnection elastically displaceable in a wall thickness direction may be named generically, and an elastic displacement permission part may be called.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

(A) is principal part sectional drawing of the female terminal of the connector of embodiment, (b) is sectional drawing which expands and shows the structure of the fitting part of the female terminal and a male terminal. It is a perspective view which shows the external appearance structure of the connector of the embodiment, (a) is a block diagram of the 1st connector provided with a female terminal, (b) is the structure which shows the 2nd connector provided with a male terminal, and a 1st connector together. FIG. It is explanatory drawing of the problem in the comparative example (example before giving improvement by this invention) with respect to embodiment of this invention, and fitting of the female terminal and male terminal before improvement at the time of connecting a 1st connector and a 2nd connector It is sectional drawing which expands and shows the structure of a part.

Explanation of symbols

30 Male terminal 31 Tab 160 Female terminal 161 Tab receiving part 161a, 161c Wide wall 161b Side wall 161d Cut 163 Bending part 164 Leaf spring 166 Protrusion 170 Spring part

Claims (1)

It is a structure of a female terminal provided with a rectangular tube-shaped tab receiving part into which a strip-like tab of a male terminal can be inserted,
The tab receiving portion has a width of the one wide wall on the inner surface of one of the wide walls facing the plate surface of the tab when the tab is inserted into the tab receiving portion. Two protrusions formed at intervals in the direction, a leaf spring for pressing the inserted tab toward the protrusion on the inner surface of the other wide wall, and formed on the one wide wall A slit formed between the two protrusions and dividing the one wide wall in a direction intersecting the width direction is provided,
Each of the one wide wall divided by the cut is provided with an elastic displacement allowing portion formed so as to be elastically displaceable independently in the wall thickness direction of the wide wall ,
The elastic displacement allowing portion is formed such that the range from the upper half of the pair of left and right side walls connected to the wide wall to the cut of the one wide wall is thinner than the wall thickness of the other tab receiving portion. Formed by,
The structure of the female terminal.

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