The present disclosure relates to a connector.
A conventional connector for vehicle is described in Patent Document 1. This connector is provided with a first connector including a first terminal and a second connector including a second terminal to be connected to the first terminal. The second terminal includes a pair of connecting portions facing each other. The first terminal is inserted into between the pair of connecting portions of the second terminal to contact the respective connecting portions. In this way, the first and second terminals are electrically connected.
The present inventor has studied how to suppress an insertion force in inserting a first terminal into between a pair of connecting portions in a connector as described above. If the insertion force is too large, assemblability in assembling the first and second connectors is deteriorated.
Accordingly, it is aimed to provide a connector capable of improving the assemblability of first and second connectors.
The present disclosure is directed to a connector with a first connector including a first terminal and a second connector including a second terminal to be connected to the first terminal, the second terminal including a first spring member having a pair of first spring pieces facing each other and a second spring member having a pair of second spring pieces for sandwiching the pair of first spring pieces, the pair of second spring pieces applying pressing forces to the pair of first spring pieces in mutually approaching directions, the first terminal being sandwiched by the pair of first spring pieces, whereby the first terminal and the first spring member are electrically connected, and the second spring member including a stopper portion for restricting displacements of the pair of first spring pieces in the mutually approaching directions by contacting the pair of first spring pieces.
According to the present disclosure, it is possible to provide a connector capable of improving the assemblability of first and second connectors.
First, embodiments of the present disclosure are listed and described.
[1] The connector of the present disclosure is provided with a first connector including a first terminal and a second connector including a second terminal to be connected to the first terminal, the second terminal including a first spring member having a pair of first spring pieces facing each other and a second spring member having a pair of second spring pieces for sandwiching the pair of first spring pieces, the pair of second spring pieces applying pressing forces to the pair of first spring pieces in mutually approaching directions, the first terminal being sandwiched by the pair of first spring pieces, whereby the first terminal and the first spring member are electrically connected, and the second spring member including a stopper portion for restricting displacements of the pair of first spring pieces in the mutually approaching directions by contacting the pair of first spring pieces.
According to this configuration, in a non-inserted state of the first terminal, the pair of first spring pieces can be held not to contact each other by the stopper portion of the second spring member. In this way, an excessive increase of an insertion force in inserting the first terminal into between the pair of first spring pieces can be suppressed, with the result that the assemblability of the first and second connectors can be improved.
[2] The second spring member includes a coupling portion coupling the pair of second spring pieces, the coupling portion includes through holes having the stopper portions on edge parts, and the first spring pieces are inserted in the through holes.
According to this configuration, the displacements of the respective first spring pieces in the mutually approaching directions can be restricted by the contact of the first spring pieces with the edge parts of the through holes serving as the stopper portions. In this configuration, the displacements of the first spring pieces can be restricted by a simple configuration of only inserting the first spring pieces into the through holes.
[3] Each first spring piece includes a bent portion bent such that the respective first spring pieces are convex in the mutually approaching directions, each first spring piece contacts the first terminal on a convex side of the bent portion, each second spring piece includes a pressing portion to be fit into a concave side of the bent portion, and each pressing portion applies the pressing force to the bent portion.
According to this configuration, the pressing portion can be positioned with respect to the first spring piece by fitting the pressing portion of the second spring piece into the concave side of the bent portion. Further, the pressing portion of the second spring piece is positioned by the bent portion in contact with the first terminal. Thus, a spring force of the second spring piece can be suitably applied to the first terminal.
[4] The first spring piece includes a plurality of first divided spring pieces, the second spring piece includes a plurality of second divided spring pieces to be respectively brought into contact with the plurality of first divided spring pieces, each first divided spring piece is in contact with the first terminal, and each second divided spring piece applies the pressing force to the first divided spring piece in contact therewith.
According to this configuration, each first divided spring piece and each second divided spring piece can be individually displaced according to a relative position shift of the first terminal in a rotating direction about an axis along the inserting direction. In this way, even if the first terminal is shifted in position in the rotating direction, a reduction in a contact pressure of each first spring piece with the first terminal can be maximally suppressed.
A specific example of a connector of the present disclosure is described below with reference to the drawings. Some of components may be shown in an exaggerated or simplified manner for the convenience of description in each figure. Further, a dimension ratio of each part may be different in each figure. Further, “orthogonal” in this specification means not only strictly orthogonal, but also substantially orthogonal within a range in which functions and effects in this embodiment are achieved. Further, examples of a “flat plate shape” in this specification include shapes with chamfered corner parts and ridge parts, shapes with rounded corner parts and ridge parts, and shapes formed with irregularities in a part or the entirety of a surface constituting the shape. Further, a “tube” used in the description of this specification means not only a tube formed with a peripheral wall continuous over an entire periphery in a circumferential direction, but also a tube constituted by combining a plurality of components or a tube including a cut or the like in a part in the circumferential direction such as a C shape. Further, examples of a “tubular” shape include circular tubular shapes, elliptical tubular shapes and polygonal tubular shapes with pointed or round corners.
As shown in
The first connector 11 shown in
Note that an X axis, out of XYZ axes orthogonal to each other in figures, is along a width direction of the connector 10. Further, the Y axis is along a depth direction of the connector 10. Further, the Z axis is along a front-rear direction of the connector 10. In the following description, a direction along the X axis, that along the Y axis and that along the Z axis are respectively referred to as an X-axis direction, a Y-axis direction and a Z-axis direction.
(Configuration of First Connector 11)
As shown in
(Configuration of Second Connector 12)
As shown in
(Configuration of Second Terminal 14)
As shown in
(Configuration of First Spring Member 23)
The first spring member 23 is, for example, formed by press-working a metal plate. The first spring member 23 constitutes electrical contact points with the first terminal 13. Thus, the first spring member 23 is constituted by a conductor. A constituent material of the first spring member 23 is, for example, a copper or silver-based metal.
The first spring member 23 includes a pair of supporting portions 25, a pair of first spring pieces 26, a coupling portion 27 and a connecting portion 28.
The pair of supporting portions 25 are facing each other in the X-axis direction. The coupling portion 27 couples the pair of supporting portions 25 to each other. The pair of supporting portions 25 extend, for example, along the Z-axis direction from the coupling portion 27. The first spring piece 26 extends from each of the pair of supporting portions 25. Each first spring piece 26 is located between the pair of supporting portions 25. The pair of first spring pieces 26 are facing each other in the X-axis direction.
The connecting portion 28 extends from the coupling portion 27. The connecting portion 28 extends, for example, to a side opposite to a side where the supporting portions 25 are provided. The connecting portion 28 extends, for example, along the Z-axis direction. The connecting portion 28 is connected to an unillustrated terminal of the second in-vehicle device. The connecting portion 28 extends, for example, from a central part in the X-axis direction of the coupling portion 27. Further, the supporting portions 25 respectively extend from both end parts in the X-axis direction of the coupling portion 27. In the coupling portion 27, a length from the connecting portion 28 to one supporting portion 25 and that from the connecting portion 28 to the other supporting portion 25 are, for example, set to be equal.
The pair of supporting portions 25 have, for example, the same shape. Further, the pair of first spring pieces 26 have, for example, the same shape. The supporting portion 25 includes a base end part, which is one end part in the Z-axis direction, and a tip part, which is the other end part in the Z-axis direction. The base end part of the supporting portion 25 is connected to the coupling portion 27. The tip part of the supporting portion 25 is connected to the first spring piece 26. The first spring piece 26 extends from the tip part of the supporting portion 25 toward the coupling portion 27. The first spring piece 26 is formed by folding the tip part of each supporting portion 25 inwardly. That is, the first spring piece 26 includes a base end part connected to the supporting portion 25 and a tip part, which is an open end. The respective first spring pieces 26 are biased in mutually approaching directions by the resilience of the second spring member 24.
(Configuration of First Spring Pieces 26)
Each first spring piece 26 includes a first inclined portion 31, a second inclined portion 32, a bent portion 33 and an engaging protrusion 34.
The bent portions 33 are formed by bending parts in the Z-axis direction of the first spring pieces 26 to be convex in the mutually approaching directions. The bent portion 33 is bent when viewed from the Y-axis direction. The first inclined portion 31 is, for example, a part of the first spring piece 26 from the base end part to the bent portion 33. The second inclined portion 32 is, for example, a part of the first spring piece 26 from the bent portion 33 to the tip part. The bent portion 33 is formed between the first and second inclined portions 31, 32. In the Z-axis direction, a length of the first inclined portion 31 is set to be longer than that of the second inclined portion 32. In other words, the bent portion 33 is provided closer to the tip side than a center in the Z-axis direction in the first spring piece 26.
The respective first inclined portions 31 are facing each other in the X-axis direction. The respective first inclined portions 31 are inclined to approach each other toward the tip sides of the first spring pieces 26. The respective second inclined portions 32 are inclined to separate from each other toward the tip sides of the first spring pieces 26. The engaging protrusion 34 is provided on the tip part of each first spring piece 26. The engaging protrusion 34 is, for example, formed to have a narrower width than the tip part of the second inclined portion 32.
The bent portion 33 is an angled portion formed by the first and second inclined portions 31, 32. The respective bent portions 33 project inwardly of the pair of first spring pieces 26. That is, convex sides in the respective bent portions 33 are sides approaching each other, and concave sides are back sides. A recess 35 is formed on the back side of the bent portion 33, which is the angled portion formed by the first and second inclined portions 31, 32.
A contact portion 36 to be brought into contact with the first terminal 13 is provided on a top part of the convex side of each bent portion 33. The respective contact portions 36 are formed, for example, by deforming parts of the respective bent portions 33 to be dented toward the sides approaching each other. In the respective first spring piece 26, the respective contact portions 36 are provided at the same position in the Z-axis direction. The pair of first spring pieces 26 are closest to each other at the respective contact portions 36.
Note that the first spring member 23 is, for example, composed of two components. These two components are a first component A1 and a second component A2. Each of the first and second components A1, A2 is formed, for example, by press-working a metal plate. Each of the first and second components A1, A2 includes a part of the coupling portion 27, one supporting portion 25 and one first spring piece 26. Further, the first and second components A1, A2 are bonded to each other at the connecting portion 28.
As shown in
As shown in
As shown in
As shown in
(Configuration of Second Spring Member)
The second spring member 24 is held on the tip parts of the pair of first spring pieces 26. The second spring member 24 is formed, for example, by press-working a metal plate. Note that the second spring member 24 does not constitute an electrical circuit in the connector 10. Thus, a material difficult to conduct electricity and an insulator can be used as a constituent material of the second spring member 24. The constituent material of the second spring member 24 is, for example, a stainless steel.
As shown in
The second spring member 24 is mounted to sandwich the pair of first spring pieces 26 by the pair of second spring pieces 41. The second spring member 24 includes pressing portions 43 on tip parts of the respective second spring pieces 41. Each second spring piece 41 includes, for example, a tubular portion 44 tubular when viewed from the Y-axis direction on the tip part of the second spring piece 41. The tubular portion 44 is, for example, formed with a gap in a part in the circumferential direction like a C shape. The tubular portion 44 has an arcuate shape when viewed from the Y-axis direction.
In assembling the second spring member 24 with the first spring pieces 26, unillustrated rod-like jigs are inserted into the tubular portions 44 of the respective second spring pieces 41. An interval between the second spring pieces 41 is widened by these rod-like jigs and, in that state, the pair of first spring pieces 26 are arranged between the pair of second spring pieces 41.
In each second spring piece 41, the pressing portion 43 is a part in the circumferential direction. That is, the pressing portion 43 of this embodiment has an arcuate shape when viewed from the Y-axis direction. The pressing portion 43 is fit into the recess 35 of each first spring piece 26. The respective pressing portions 43 apply pressing forces to the respective bent portions 33 in the mutually approaching directions. That is, the respective second spring pieces 41 press the bent portions 33 of the first spring pieces 26 in the mutually approaching directions by the pressing portions 43.
Further, the pressing portion 43 contacts the first inclined portion 31 on one side in the Z-axis direction and contacts the second inclined portion 32 on the other side in the Z-axis direction. That is, the second spring member 24 is positioned in the Z-axis direction by fitting the pressing portions 43 into the recesses 35.
As shown in
As shown in
In assembling the second spring member 24 with the first spring member 23, the rod-like jigs are inserted into the tubular portions 44 of the respective second divided spring pieces 41a arranged in the Y-axis direction in the respective second spring pieces 41. Then, an interval between the respective second divided spring pieces 41a is widened by these rod-like jigs and the pairs of first divided spring pieces 26a are arranged between the pairs of second divided spring pieces 41a facing each other.
As shown in
The coupling portion 42 is, for example, in the form of a flat plate extending along a plane orthogonal to the Z axis. The coupling portion 42 includes, for example, through holes 46 penetrating through the coupling portion 42 in the Z-axis direction. The engaging protrusions 34 are inserted into the through holes 46. The stopper portions 45 are edge parts of the through holes 46. One second spring member 24 has as many through holes 46 as the first divided spring pieces 26a of one first spring member 23. In this embodiment, each second spring member 24 is provided with four through holes 46. In each second spring member 24, the respective engaging protrusions 34 are inserted in the respective through holes 46.
Functions of this embodiment are described.
In inserting the first terminal 13 into the second terminal 14, the tip part of the first terminal 13 contacts the first inclined portions 31 of the respective first spring pieces 26. Then, the first terminal 13 is inserted in the inserting direction D while pushing the pair of first spring pieces 26 outward apart from each other in the X-axis direction by the inclination of the first inclined portions 31. At this time, a gap is secured between the pair of first spring pieces 26 facing each other in the X-axis direction by the stopper portions 45. In this way, the respective first inclined portions 31 are kept at a small inclination angle with respect to the inserting direction D in the pair of first spring pieces 26. Thus, an insertion force can be reduced when the first terminal 13 is inserted while pushing the respective first inclined portions 31 wider apart.
The first and second terminals 13, 14 may be shifted in position, for example, in the X-axis direction due to manufacturing tolerances between the first and second connectors 11, 12.
Further, as shown in
Effects of this embodiment are described.
(1) The second terminal 14 includes the first spring member 23 having the pair of first spring pieces 26 facing each other and the second spring member 24 having the pair of second spring pieces 41 for sandwiching the pair of first spring pieces 26. The pair of first spring pieces 26 are biased in the mutually approaching directions by the resilience of the second spring member 24. The pair of second spring pieces 41 apply pressing forces to the pair of first spring pieces 26 in the mutually approaching directions. By sandwiching the first terminal 13 by the pair of first spring pieces 26, the first terminal 13 and the first spring member 23 are electrically connected. The second spring member 24 includes the stopper portions 45 for restricting displacements of the pair of first spring pieces 26 in the mutually approaching directions by contacting the pair of first spring pieces 26.
According to this configuration, the pair of first spring pieces 26 can be held not to contact each other by the stopper portions 45 of the second spring member 24 in the non-inserted state of the first terminal 13. In this way, even if forces of the second spring pieces 41 are increased to obtain a large contact pressure of the first and second terminals 13, 14, an excessive increase of the insertion force in inserting the first terminal 13 into between the pair of first spring pieces 26 can be suppressed, with the result that the assemblability of the first and second connectors can be improved.
(2) The second spring member 24 includes the coupling portion 42 coupling the pair of second spring pieces 41 to each other. The coupling portion 42 includes the through holes 46 having the stopper portions 45 on the edge parts. The first spring pieces 26 are inserted into the through holes 46. According to this configuration, displacements of the respective first spring pieces 26 in the mutually approaching directions can be restricted by the contact of the first spring pieces 26 with the edge parts of the through holes 46 serving as the stopper portions 45. In this configuration, the displacements of the first spring pieces 26 can be restricted by a simple configuration of only inserting the first spring pieces 26 into the through holes 46.
(3) Each first spring piece 26 includes the bent portion 33 bent such that the respective first springs 26 are convex in the mutually approaching directions. Each first spring piece 26 contacts the first terminal 13 on the convex side of the bent portion 33. Each second spring piece 41 includes the pressing portion 43 to be fit into the concave side of the bent portion 33. Each pressing portion 43 applies a pressing force to the bent portion 33. According to this configuration, the pressing portion 43 of the second spring piece 41 can be positioned with respect to the first spring piece 26 by fitting the pressing portion 43 into the concave side of the bent portion 33. Further, the pressing portion 43 of the second spring piece 41 is positioned by the bent portion 33 in contact with the first terminal 13. Thus, a spring force of the second spring piece 41 can be suitably applied to the first terminal 13.
(4) The first spring piece 26 includes the plurality of first divided spring pieces 26a. The second spring piece 41 includes the plurality of second divided spring pieces 41a configured to respectively contact the plurality of first divided spring pieces 26a. Each first divided spring piece 26a is in contact with the first terminal 13. Each second divided spring piece 41a applies a pressing force to the first divided spring piece 26a in contact therewith. According to this configuration, each first divided spring piece 26a and each second divided spring piece 41a can be individually displaced according to a relative position shift of the first terminal 13 in the rotating direction about the axis along the inserting direction D. In this way, even if the first terminal 13 is shifted in position in the rotating direction, a reduction in the contact pressure of each first spring piece 26 with the first terminal 13 can be maximally suppressed.
(5) By sandwiching the first terminal 13 in the X-axis direction by the pair of first spring pieces 26 of the second terminal 14, contact points with the second terminal 14 are formed on both side surfaces in the X-axis direction of the first terminal 13. In this way, even if the first terminal 13 is relatively shifted in position in the Z-axis direction and Y-axis direction with respect to the second terminal 14, the first terminal 13 and the pair of first spring pieces 26 are stably connected without being separated.
The second spring member 24 is movable in the X-axis direction according to the position shift of the first terminal 13 in the X-axis direction with respect to the second terminal 14. Since the second spring member 24 moves in the X-axis direction according to the position shift in this way if the first terminal 13 is relatively shifted in position in the X-axis direction with respect to the second terminal 14, a contact pressure of the first terminal 13 and each first spring piece 26 can be secured without the contact portion 36 of each first spring piece 26 being separated from the first terminal 13.
That is, in the connector 10 of this embodiment, position shifts in the X-axis direction, Y-axis direction and Z-axis direction and a position shift in the rotating direction can be dealt with by the configuration of the second terminal 14 itself. Accordingly, in the connector 10 of this embodiment, it is not necessary to constitute a part of an electrical path by a flexible conductor such as a stranded wire or braided wire for absorbing the position shifts and make the housing for holding the terminals movable. Thus, the connector 10 of this embodiment can deal with the above position shifts while enabling the simplification of the configuration.
(6) The pressing portion 43 of each second spring piece 41 has an arcuate shape. In this way, even if the second spring member 24 moves in the X-axis direction as the first terminal 13 is shifted in position in the X-axis direction, each pressing portion 43 can be suitably brought into contact with each first spring piece 26.
(7) The length L2 from the base end part of the second spring piece 41 to the contact portion 36 is set to be shorter than the length L1 from the base end part of the first spring piece 26 to the contact portion 36 in the direction along the inserting direction D of the first terminal 13. According to this configuration, a spring force of the second spring piece 41 acting on the contact portion 36 is easily made larger than that of the first spring piece 26 acting on the contact portion 36. Therefore, the contact pressure of each first spring piece 26 with the first terminal 13 can be suitably secured by making the spring force of the second spring piece 41 assisting the spring force of the first spring piece 26 larger.
This embodiment can be modified and carried out as follows. This embodiment and the following modifications can be carried out in combination without technically contradicting each other.
[Addendum 1]
In one aspect of the present disclosure, the stopper portions (45) may be first stopper portions, and the second spring member (24) may further include second stopper portions for restricting displacement amounts of the pair of first spring pieces (26) in the mutually separating directions by contacting the pair of first spring pieces (26).
[Addendum 2]
In one aspect of the present disclosure, the coupling portion (42) may include the through holes (46) into which the pair of first spring pieces (26) are respectively inserted, and the tips of the first spring pieces (26) may project more backward in the inserting direction (D) of the first terminal (13) than the coupling portion (42).
[Addendum 3]
In one aspect of the present disclosure, the through holes (46) may have inner edge parts to be contacted by the pair of first spring pieces (26) when the pair of first spring pieces (26) are displaced in the mutually approaching directions and outer edge parts to be contacted by the pair of first spring pieces (26) when the pair of first spring pieces (26) are displaced in the mutually separating directions, the first stopper portions may be the inner edge parts and the second stopper portions may be the outer edge parts.
Number | Date | Country | Kind |
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2020-194637 | Nov 2020 | JP | national |
Filing Document | Filing Date | Country | Kind |
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PCT/JP2021/040747 | 11/5/2021 | WO |