JP2008176965A - Electrical connection parts and connector terminals - Google Patents

Abstract

Provided are an electrical connection terminal and a connector terminal that are excellent in electrical connection stability when used for a large current.
In a connector terminal in which a male terminal having a pin terminal is formed so as to be fitted to a female terminal having a sleeve terminal, a conductive material is provided around a core wire 2 formed of an annular body inside the sleeve terminal. An electrical connection component 1 around which a slant winding coil 3 made of a conductive wire is wound is mounted, and the sleeve terminal and the pin terminal are electrically connected by contacting the pin terminal and the electrical connection component 1. The connector terminals were configured as follows.
[Selection] Figure 1

Description

  The present invention relates to a connector terminal having a structure in which a pin terminal is inserted into a sleeve terminal, and an electrical connection component used for the connector terminal.

  A connector terminal used in a hybrid car that uses both a gasoline engine and an electric motor, an electric vehicle, and the like is used with a larger current than a conventional connector terminal for an automobile. As a connector terminal for use with such a large current, a multi-contact terminal having increased contact reliability by increasing the number of contacts is used. As a conventional multi-contact terminal, an electrical connector (see, for example, Patent Document 1) in which a gradient coil spring ring is disposed in a ring housing space of a housing is known.

JP 2005-510849 A (Claim 1, FIG. 1 etc.)

  The electrical connection component composed of the inclined coil spring ring used in the connector terminal described in Patent Document 1 has a problem that the coil is easily crushed and the shape retention is low when an excessive force is applied during insertion / extraction. When the coil is crushed, the contact between the terminal and the electrical connection component becomes insufficient, and the predetermined performance cannot be exhibited. In particular, when a soft wire material such as a copper wire is used in order to increase the conductivity, the shape retainability is lowered. Further, when trying to increase the shape retention, there is a problem that the material of the wire is limited and the conductivity is lowered.

  The problem to be solved by the present invention is to provide an electrical connection terminal and a connector terminal that are excellent in electrical connection stability when used for a large current.

  In order to solve the above-described problems, the electrical connection component of the present invention is summarized in that an oblique winding coil made of a conductive wire is wound around a core wire made of an annular body.

  In the electrical connection component, it is preferable that the core wire has conductivity. Moreover, it is preferable that it is a cyclic | annular body by which the core wire was wound helically in multiple times. Moreover, it is preferable that the said diagonal winding coil is a coil spring which has a spring property. Moreover, it is preferable that the said diagonal winding coil consists of a copper wire by which Sn plating was carried out.

  The connector terminal of the present invention is a connector terminal in which a male terminal having a pin terminal is formed so as to be able to be fitted to a female terminal having a sleeve terminal. The gist of the invention is that the sleeve terminal and the pin terminal are electrically connected by contacting the pin terminal and the electrical connection component.

  According to the present invention, since the oblique winding coil made of a conductive wire is wound around the core wire made of the annular body, the shape of the oblique winding coil is favorably held by the core wire, and the terminal There is no possibility that the diagonally wound coil will be crushed during insertion and removal, and good electrical connectivity can be maintained. In addition, since the diagonally wound coil is difficult to be crushed, a material such as a copper wire which has good conductivity but is flexible, which could not be used conventionally, can be used as the material of the obliquely wound coil. As described above, the present invention provides an electrical connection terminal and a connector terminal that can improve electrical connection stability when used with a large current.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external perspective view showing an embodiment of the electrical connection component of the present invention. An electrical connection component 1 shown in FIG. 1 is one in which an oblique winding coil 3 made of a conductive wire is wound around a core wire 2 made of an annular body. The core wire 2 is formed in a four-turn coil shape in which an annular body is wound four times, and has a spring property. In addition, the electrical connection component 1 may be formed of a single winding as shown in FIG. 6, or may be formed into a plurality of windings other than the four windings, in addition to using the annular body having the core wire 2 of four windings. .

  The core wire 2 is obtained by bending a wire having a circular cross section into a coil shape in which four windings are continuous. The shape of the core wire 2 is formed in a substantially circular coil shape. In addition, although the cross section of the wire used for the core wire 2 can be formed in shapes other than a circle, it is preferable that the cross section is formed in a circular shape because the contact resistance with the oblique winding coil 3 is stable (see FIG. 5).

  2 and 3 are explanatory views showing an aspect of the oblique winding coil, FIG. 2 (a) is a front view in the radial direction, FIG. 2 (b) is a cross-sectional view along the line BB in FIG. The description of the material is omitted. The diagonally wound coil 3 wound around the core wire 2 is formed as a coil spring in which a wire having a circular cross section is wound around the entire core wire 2 in a coil shape in which winding is continued. The diagonally wound coil 3 includes, for example, a radial spring ring having a circular cross section as shown in FIG. 3, and an axial spring ring wound to have an elliptical cross section as shown in FIG. It can be formed in any shape.

  The number of turns of the diagonally wound coil 3 is not particularly limited as long as it is formed in a coil shape continuous in the length direction around the core wire 2 over the entire length direction of the core wire 2 and has a spring property. Specifically, it can be set to an appropriate number of times according to the diameter of the core wire 2, the diameter of the wire used for the core wire 2, the size of the wire of the oblique winding coil, and the like.

  As the wire material of the core wire 2 and the oblique winding coil 3, it is preferable to use a conductive wire material such as a copper wire. Further, by plating the surface of the wire, an oxide film can be prevented and connection stability is improved. As such a wire, for example, a Sn (tin) plated copper wire is preferably used. The core wire 2 can be made of a non-conductive material because the diagonally wound coil 3 is conductive. However, if a conductive material is used, the contact resistance of the electrical connection component is further reduced, and the core wire 2 is electrically conductive. It is preferable because stable connection stability is improved.

  The electrical connection component 1 is obtained, for example, by winding a wire material that forms the oblique winding coil 3 around the core wire 2. In addition, it is preferable to form the diagonally wound coil 3 so as not to be completely in close contact with the core wire 2. That is, it is preferable that the diagonally wound coil 3 is formed so as to have a clearance with a gap between the core wire 2 and the diagonally wound coil 3. Since the diagonally wound coil 3 has a clearance, when the connector terminal is inserted, the insertion / extraction force of the terminal is increased by the elastic force of the obliquely wound coil 3, and the contact load is stabilized. If the insertion / extraction force becomes too large, plating of the electrical connection parts and terminal surfaces will occur and it will become difficult to insert / extract, so it is preferable that the insertion / extraction force is within a range where such problems do not occur. Moreover, when there is a clearance, the restoring force due to the elasticity of the oblique winding coil 3 can be exhibited well.

  FIG. 4 is an exploded perspective view of the connector terminal. As shown in the figure, the connector terminal 10 is formed so that a male terminal 12 including a pin terminal 11 can be fitted to a female terminal 14 including a sleeve terminal 13. The above-mentioned electrical connection component 1 is mounted inside the sleeve terminal 13 so that the sleeve terminal 13 and the pin terminal 11 are electrically connected when the pin terminal 11 and the electrical connection component 1 come into contact with each other. Is formed.

  FIGS. 5A and 5B are diagrams for explaining a method of mounting the electrical connection component of the sleeve terminal. FIG. 5A is a cross-sectional view of the sleeve terminal and the fixed component, and FIG. 5B is a state where the electrical connection component is mounted on the sleeve terminal. FIG. As shown in FIG. 5A, the sleeve terminal 13 is provided with a step 15 in which the inner diameter of the terminal insertion hole 16 is increased in order to hold the electrical connection component 1 in the middle of the internal terminal insertion hole 16. ing. As shown in the figure, a fixing component 17 for fixing the electrical connecting component 1 inside the sleeve terminal 13 is used. The fixed component 17 is formed in a hollow cylindrical shape, is fitted to a portion where the outer diameter of the sleeve terminal is expanded, and the inner diameter is formed so that the pin terminal 11 can be inserted. A fixing protrusion 19 that protrudes so as to fit in a through hole 18 provided in a side wall of the terminal insertion hole 16 of the sleeve terminal 13 is provided outside the fixing component 17.

  As shown in FIG. 5B, when the electrical connection component 1 is inserted into the terminal insertion hole 16 of the sleeve terminal 13, the electrical connection component 1 stops at the step 15. Further, when the fixing component 17 is inserted from the inlet side of the terminal insertion hole 16, the fixing protrusion 19 is inserted into the through hole 18 of the sleeve terminal 13, and the fixing component 17 is fixed at a predetermined position in the sleeve terminal 13 to be electrically connected. The component 1 is fixed inside the sleeve terminal 13.

  Hereinafter, the fitting and connecting action of the connector terminal will be described. FIG. 6 is a cross-sectional view showing a connection state of connector terminals using an electrical connection component in which the core wire annular body has one turn. As shown in the figure, in the sleeve terminal 13, the diagonally wound coil 3 of the electrical connection component 1 is in contact with the wall of the terminal insertion hole 16 of the sleeve terminal 13. When the pin terminal 11 is inserted into the sleeve terminal 13, the pin terminal 11 comes into contact with the electrical connection component 1 and contacts the oblique winding coil 3 of the electrical connection component 1. The pin terminal 11 and the sleeve terminal 13 are electrically connected via the oblique winding coil 3 of the electrical connection component 1. Since the oblique winding coil 3 and the pin terminal 11 and the sleeve terminal 13 have a large number of contacts, the connection stability is good.

  Moreover, since the core winding 2 exists in the diagonal winding coil 3 of the electrical connection component 1, the shape of the diagonal winding coil 3 is favorably maintained, and a stable contact state with the connector terminal is maintained.

  FIG. 7 is a cross-sectional view illustrating a connection state of connector terminals using an electrical connection component having a core wire annular body with four windings. As shown in the figure, when the number of turns of the core wire 2 is increased, better conductivity is obtained and the contact resistance is lowered. When the core wire 2 is configured as an annular body that is wound a plurality of times in a spiral manner, as in the case of using a core wire composed of a four-turn annular body shown in FIG. 7, the following effects are obtained. When the number of turns of the core wire 2 is increased and the number of turns is increased, the number of turns of the oblique winding coil 3 of the electrical connection component 1 is increased as long as the pitch of the oblique winding coil 3 is the same. As the number of turns of the oblique winding coil 3 is increased, the number of contacts between the terminal and the oblique winding coil is drastically increased, so that the contact resistance is lowered and the electrical connection stability is improved.

  Further, when the number of windings of the core wire 2 is increased, as shown in FIG. 7, the contact between the electrical connection component and the pin terminal increases in the longitudinal direction of the pin terminal, so that the pin terminal 11 moves inside the sleeve terminal 13. It becomes difficult to obtain a more stable contact state with the pin terminal.

  Further, when the number of turns of the oblique winding coil 3 increases and the number of contacts increases, the contact load per contact can be reduced. Therefore, even a material that is flexible and difficult to increase the contact load can be used as the material of the oblique winding coil 3, and there is an advantage that the range of selection of the material to be used is widened.

Experimental example When the core wire of the electrical connection terminal is an insulator (Experimental example 1) and a conductor (Experimental example 2), when the number of turns of the oblique winding coil is 1 (Experimental example 2) and 4 turns In the case (Experimental Example 3), the difference in the contact resistance of the connector terminal was compared. The results are shown in Table 1. In Experimental Examples 1 to 3, a cylindrical body made of Sn-plated copper alloy was used as the male terminal of the connector terminal, and a cylindrical body made of Sn-plated copper alloy was used as the female terminal. In addition, as the core wire, Experimental Example 1 uses an insulator, Experimental Examples 2 and 3 use Sn-plated copper wire (Sn plated copper wire) φ0.7, and the oblique winding coils of Experimental Examples 1 to 3 Used the wire number formed in Table 1 using Sn plated copper wire φ0.32 as the wire.

  As shown in Table 1, when the contact resistances of Experimental Example 1 using an insulator for the core wire 2 as the electrical connection component 1 and Experimental Example 2 using a conductive Sn-plated copper wire for the core wire 2 are compared, In Experimental Example 2 in which 2 has conductivity, the contact resistance is lower even if the number of turns of the oblique winding coil 3 is the same. Moreover, when comparing the experimental example 2 in which the number of turns of the core wire 2 is 1 and the experimental example 3 in which the number of turns of the core wire 2 is 4, compared with the experimental example 2 in which the number of turns of the oblique winding coil 3 is 40 times. The contact resistance of Experimental Example 3 in which the number of turns of the diagonally wound coil 3 is 150 is significantly reduced.

  The electrical connection component and the connector terminal of the present invention can be optimally used for a connector terminal of an electrical connection cable mounted on a hybrid car, an electric vehicle or the like in which a large current is used.

It is an external appearance perspective view which shows one Embodiment of the electrical-connection component of this invention. It is explanatory drawing which shows the aspect of a diagonal winding coil. It is explanatory drawing which shows the aspect of a diagonal winding coil. It is a disassembled perspective view of a connector terminal. The method of mounting | wearing with an electrical connection component in a sleeve terminal is shown, (a) is sectional drawing of a sleeve terminal and a fixing component, (b) is sectional drawing which shows the state which mounted | wore the sleeve terminal with the electrical connection component. It is sectional drawing which shows the connection state of the connector terminal using the electrical connection component in which the annular body of a core wire uses 1 roll. It is sectional drawing which shows the connection state of the connector terminal using the electrical connection component in which the annular body of a core wire uses 4 windings.

Explanation of symbols

1 Electrical connection parts 2 Core wire
3 Diagonal winding coil 10 Connector terminal 11 Pin terminal 13 Sleeve terminal

Claims (6)

  An electrical connection component, characterized in that an oblique winding coil made of a conductive wire is wound around a core wire made of an annular body.   The electrical connection component according to claim 1, wherein the core wire has conductivity.   The electrical connection component according to claim 1, wherein the core wire is an annular body wound a plurality of times in a spiral shape.   The electrical connection component according to any one of claims 1 to 3, wherein the oblique winding coil is a coil spring having a spring property.   The electrical connection component according to claim 1, wherein the oblique winding coil is made of a Sn-plated copper wire. In the connector terminal in which the male terminal provided with the pin terminal is formed so as to be fitted to the female terminal provided with the sleeve terminal, the electrical connection component according to any one of claims 1 to 5 is provided inside the sleeve terminal. A connector terminal, wherein the connector terminal is formed so that the sleeve terminal and the pin terminal are electrically connected by contacting the pin terminal and the electrical connection component.

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