Patent Application
20230283013
The present invention relates to a connector assembly, particularly to a connector assembly that performs the fitting operation between a first connector and a second connector upon rotation of a lever member.
Conventionally, there has been known a connector assembly using rotation of a lever member to facilitate the fitting operation of a pair of connectors. For example, JP 2018-152265 A discloses a connector assembly including a first connector 1 and a second connector 2 to be fitted to the first connector 1 along a fitting direction D, as shown in
The lever member 3 is provided with a guiding groove (not shown) facing the outer surface of the second housing 2A. The second connector 2 is moved to approach the first connector 1 along the fitting direction D, and the lever member 3 is rotated with the protrusion 1B of the first connector 1 being inserted in the guiding groove of the lever member 3, whereby the first connector 1 and the second connector 2 are fitted to each other.
Through fitting between the first connector 1 and the second connector 2, first contacts 1C disposed inside the first housing 1A are electrically connected to second contacts 2D inserted in contact insertion ports 2C of the second connector 2 as shown in
The second contacts 2D are connected to ends of electric wires 4, and for instance, when the first connector 1 is mounted on an electric device (not shown), electric current can be applied to the electric device through the electric wires 4.
When electric current is applied to an electric device using the foregoing connector assembly, the electric wires 4 connected to the second contacts 2D need to have a larger thickness as electric current increases.
However, when, for instance, the electric device is disposed in an environment where the electric device receives an external force such as vibration, e.g., installed in a vehicle, the external force would be transmitted via the thick electric wires 4 to the points of contact between the first contacts 1C and the second contacts 2D, resulting in poor contact.
The contact reliability can be improved by increasing contact forces between the first contacts 1C and the second contacts 2D, but this may lead to an increase in a necessary insertion force in fitting the second connector 2 to the first connector 1, making it harder to easily perform the fitting operation between the first connector 1 and the second connector 2 even with the use of rotation of the lever member 3. Furthermore, increased contact forces may damage the surfaces of the first contacts 1C and the second contacts 2D, and this may lead to lower contact reliability.
The present invention has been made to overcome conventional problems as above and aims at providing a connector assembly that can improve contact reliability between a first contact and a second contact while ensuring easy fitting therebetween.
A connector assembly according to the present invention comprises:
Embodiments of the present invention are described below with reference to the accompanying drawings.
Fitting and detachment between the first connector 11 and the second connector 21 are carried out by operating a lever member 22 rotatably attached to the second connector 21.
For convenience, a direction in which the first connector 11 and the second connector 21 are fitted is defined as “Z direction,” a direction of rotation axis of the lever member 22 attached to the second connector 21 as “X direction,” and a direction perpendicular to the Z direction and the X direction as “Y direction”.
The second connector 21 is moved from the +Z direction toward the −Z direction to be fitted to the first connector 11.
The first insulator 13 is provided at its outer surface with a pair of first pins 13A protruding separately in the +X direction and the −X direction. While only the first pin 13A formed on the outer surface of the first insulator 13 on the +X direction side is shown in
The push member 15 includes a base 15A in a rectangular cuboid shape, and a pair of push plates 15B protruding in the +Z direction separately from the +Y directional end and the −Y directional end of the base 15A. The base 15A is provided at its outer surface with a pair of second pins 15C protruding separately in the +X direction and the −X direction. The two second pins 15C are arranged on one straight line extending along the X direction.
The first connector 11 further includes a pair of upper shells 16 fixed inside the first insulator 13 and disposed to surround the pair of first contacts 14 separately, and a lower shell 17 fixed inside the first insulator 13 and covering the bottom of the first insulator 13. A pair of springs 18 are disposed between the push member 15 and the lower shell 17, and a waterproof packing 19 is disposed on the outer periphery of the +Z directional end of the first insulator 13.
The second insulator 23 is provided at its outer surface with a pair of shaft members 23A protruding separately in the +X direction and the −X direction. While only the shaft member 23A formed on the outer surface of the second insulator 23 on the +X direction side is shown in
The lever member 22 includes a handle portion 22A bent in a U-shape, and a pair of circular plate portions 22B separately connected to the opposite ends of the handle portion 22A to face each other in the X direction and extending along a YZ plane. Of the pair of circular plate portions 22B, the surfaces facing each other are each provided with a central recess portion 22C, a first cam groove 22D situated outside the central recess portion 22C and curved in a substantially circular arc shape, a second cam groove 22E situated outside the first cam groove 22D and curved in a substantially circular arc shape, and a step portion 22F at the entrance part of the first cam groove 22D.
The pair of shaft members 23A of the second insulator 23 are inserted in the central recess portions 22C of the pair of circular plate portions 22B, so that the lever member 22 is held to be rotatable with respect to the second insulator 23.
The pair of first pins 13A of the first insulator 13 are inserted in the first cam grooves 22D of the pair of circular plate portions 22B. Those first cam grooves 22D and first pins 13A constitute a first cam mechanism that moves the first insulator 13 and the second insulator 23 relatively along the Z direction in conjunction with rotation of the lever member 22.
In addition, the pair of second pins 15C of the push member 15 are inserted in the second cam grooves 22E of the pair of circular plate portions 22B. Those second cam grooves 22E and second pins 15C constitute a second cam mechanism that moves the push member 15 along the Z direction in conjunction with rotation of the lever member 22.
The step portions 22F of the pair of circular plate portions 22B contact the pair of second pins 15C of the push member 15 to push the push member 15 in the −Z direction when the fitting between the first connector 11 and the second connector 21 starts.
As shown in
The pair of first contacts 14 have a flat plate shape and are fixed to the first insulator 13 while penetrating the first insulator 13 in the Z direction. The +Z directional end of each first contact 14 is exposed inside the corresponding second contact housing portion 13B to protrude in the +Z direction.
The base 15A of the push member 15 is housed in the push member housing portion 13C to be movable in the Z direction, and the pair of push plates 15B of the push member 15 each protrude inside the corresponding second contact housing portion 13B. The pair of push plates 15B each have a pushing surface 15D facing the corresponding first contact 14. The −Z directional end of the push member housing portion 13C is closed by the lower shell 17, and the push member 15 is pushed in the +Z direction by the springs 18 disposed between the base 15A and the lower shell 17. A Z-directional position of the push member 15 with respect to the first insulator 13 at this time is called “initial position.”
The second insulator 23 of the second connector 21 is provided with a first connector housing portion 23B of recess shape opening in the −Z direction, and further with a pair of second contact holding portions 23C of recess shape on the +Z direction side of the first connector housing portion 23B. The pair of second contact holding portions 23C are adjacent to each other in the Y direction and each communicate with the first connector housing portion 23B.
The pair of second contacts 24 connected to the ends of the two electric wires C are each housed in the inner insulator 25 and surrounded by the pair of shells 26; in this state, the pair of second contacts 24 are held in the pair of second contact holding portions 23C. The +Z directional portion of each second contact 24 is housed in and held by the second contact holding portion 23C, and the −Z directional portion thereof protrudes in the −Z direction inside the first connector housing portion 23B.
Each second contact 24 is formed of a spring contact of U-shape opening in the −Z direction and includes a fulcrum portion 24A formed at the bent part of the U-shape, a contact point portion 24B situated on the −Z direction side from the fulcrum portion 24A, and a point-of-effort portion 24C situated on the −Z direction side from the contact point portion 24B and forming a free end. The contact point portion 24B and the point-of-effort portion 24C are disposed to be elastically displaceable in the Y direction with respect to the fulcrum portion 24A. The contact point portion 24B contacts the first contact 14 of the first connector 11 when the first connector 11 and the second connector 21 are fitted with each other, and the point-of-effort portion 24C receives a pushing force in the Y direction from the pushing surface 15D of the push plate 15B of the push member 15 of the first connector 11.
Next, the fitting operation between the first connector 11 and the second connector 21 is described.
The rotation angle of the lever member 22 when the handle portion 22A extends along the Y direction as shown in
First, in the state where the lever member 22 is at a rotation angle of 0 degrees, the second connector 21 is moved toward the first connector 11 from the +Z direction to the −Z direction, whereby the +Z directional portion of the first connector 11 is inserted into the interior of the second insulator 23 of the second connector 21 as shown in
As a consequence, the second insulator 23 of the second connector 21 is situated at a fitting start position with respect to the first insulator 13 of the first connector 11 as shown in
At this time, as shown in
When the lever member 22 is rotated in this state, the first pins 13A of the first connector 11 relatively move forward along the first cam grooves 22D of the lever member 22, and the second insulator 23 of the second connector 21 gradually moves in the −Z direction with respect to the first insulator 13 of the first connector 11.
Even when the second pins 15C of the push member 15 are separated from the step portions 22F of the lever member 22 as the lever member 22 is rotated, the push member 15 is held at the withdrawn position with respect to the first insulator 13 as long as the second pins 15C are pushed in the −Z direction by outer peripheries of the lever member 22 situated outside the first cam grooves 22D; thus, the pushing surfaces 15D of the push plates 15B still do not contact the second contacts 24.
When the lever member 22 is rotated such that the handle portion 22A moves to an angle of 45 degrees with respect to the Y direction as shown in
Accordingly, as shown in
The push member 15 is held at the withdrawn position with respect to the first insulator 13, and the pushing surfaces 15D of the push plates 15B still do not contact the second contacts 24.
When the lever member 22 is further rotated from this state, the first pins 13A of the first connector 11 relatively move forward further along the first cam grooves 22D of the lever member 22, but the Z-directional position of the second insulator 23 with respect to the first insulator 13 does not change due to the shape of the first cam grooves 22D. The second pins 15C of the push member 15 start to be inserted into the second cam grooves 22E of the lever member 22.
Subsequently, when the lever member 22 is rotated until the handle portion 22A crosses the Y direction at an angle of 90 degrees as shown in
Consequently, as shown in
A distance L2 from the fulcrum portion 24A to the point-of-effort portion 24C in the second contact 24 is set longer than a distance L1 from the fulcrum portion 24A to the contact point portion 24B, and therefore, a force greater than a pushing force that the point-of-effort portion 24C receives from the pushing surface 15D of the push plate 15B acts on the contact point portion 24B due to the so-called principle of leverage, and this allows the contact point portion 24B of the second contact 24 to contact the first contact 14 with high contact pressure.
The rotational position of the lever member 22 at this time is called “second rotational position.”
In this manner, when the lever member 22 is rotated from the initial rotational position where the handle portion 22A is at an angle of 0 degrees with respect to the Y direction to the first rotational position where the handle portion 22A is at an angle of 45 degrees with respect to the Y direction, the second insulator 23 of the second connector 21 can be moved from the fitting start position to the fitting position with respect to the first insulator 13 of the first connector 11 while the push member 15 is held at the withdrawn position with respect to the first insulator 13 of the first connector 11 such that the push plates 15B do not contact the second contacts 24. Thus, the first connector 11 and the second connector 21 can be easily fitted to each other with a small insertion force.
When the lever member 22 is further rotated from the first rotational position to the second rotational position where the handle portion 22A is at an angle of 90 degrees with respect to the Y direction, the push member 15 is returned from the withdrawn position to the initial position with respect to the first insulator 13 of the first connector 11 with the second insulator 23 of the second connector 21 being kept at the fitting position with respect to the first insulator 13 of the first connector 11, so that the push plates 15B can push the point-of-effort portions 24C of the second contacts 24 in the Y direction, thereby allowing the contact point portions 24B of the second contacts 24 to contact the first contacts 14 with high contact pressure.
At this time, since the first contact 14 and the second contact 24 are pressed against each other in the Y direction without rubbing together in the Z direction, the first contact 14 and the second contact 24 are electrically connected to each other while their surfaces are prevented from being damaged.
Thus, even when the first connector 11 is mounted on an electric device installed in an environment where the electric device receives an external force such as vibration, it is possible to, while easily fitting the first connector 11 and the second connector 21 to each other, establish contact between the first contacts 14 and the second contacts 24 with high contact pressure, thus achieving reliable electric connection.
Fitting and detachment between the first connector 31 and the second connector 41 are carried out by operating a lever member 42 rotatably attached to the second connector 41.
For convenience, a direction in which the first connector 31 and the second connector 41 are fitted is defined as “Z direction,” a direction of rotation axis of the lever member 42 attached to the second connector 41 as “X direction,” and a direction perpendicular to the Z direction and the X direction as “Y direction”.
The second connector 41 is moved from the +Z direction toward the −Z direction to be fitted to the first connector 31.
The first insulator 33 is provided at its outer surface with a pair of first pins 33A protruding separately in the +X direction and the −X direction. While only the first pin 33A formed on the outer surface of the first insulator 33 on the +X direction side is shown in
The push member 35 includes a base 35A in a rectangular frame shape, and a pair of push plates 35B protruding in the +Z direction separately from the +X directional end and the −X directional end of the base 35A. The base 35A is provided at its outer surface with a pair of second pins 35C protruding separately in the +X direction and the −X direction. The two second pins 35C are arranged on one straight line extending along the X direction.
The first connector 31 further includes a pair of upper shells 36 fixed inside the first insulator 33 and disposed to surround the pair of first contacts 34 separately, and a lower shell 37 fixed inside the first insulator 33. A pair of springs 38 are disposed between the push member 35 and the lower shell 37, and a waterproof packing 39 is disposed on the outer periphery of the +Z directional end of the first insulator 33.
The second insulator 43 is provided at its outer surface with a pair of shaft members 43A protruding separately in the +X direction and the −X direction. While only the shaft member 43A formed on the outer surface of the second insulator 43 on the +X direction side is shown in
The lever member 42 includes a handle portion 42A bent in a U-shape, and a pair of circular plate portions 42B separately connected to the opposite ends of the handle portion 42A to face each other in the X direction and extending along a YZ plane. Of the pair of circular plate portions 42B, the surfaces facing each other are each provided with a central recess portion 42C and a cam groove 42D situated outside the central recess portion 42C and curved in a substantially circular arc shape. Each of the pair of circular plate portions 42B is also provided at its outer periphery with a peripheral cam surface 42E protruding in the radial direction of the circular plate portion 42B.
The pair of shaft members 43A of the second insulator 43 are inserted in the central recess portions 42C of the pair of circular plate portions 42B, so that the lever member 42 is held to be rotatable with respect to the second insulator 43.
The pair of first pins 33A of the first insulator 33 are inserted in the cam grooves 42D of the pair of circular plate portions 42B. Those cam grooves 42D and first pins 33A constitute a first cam mechanism that moves the first insulator 33 and the second insulator 43 relatively along the Z direction in conjunction with rotation of the lever member 42.
In addition, the peripheral cam surfaces 42E of the pair of circular plate portions 42B contact the pair of second pins 35C of the push member 35 in accordance with the rotation angle of the lever member 42. Those peripheral cam surfaces 42E and second pins 35C constitute a second cam mechanism that moves the push member 35 along the Z direction in conjunction with rotation of the lever member 42.
As shown in
The pair of first contacts 34 are separately housed in the pair of first contact housing portions 33B. Each first contact 34 is formed of a spring contact bent in a U-shape and includes a fulcrum portion 34A formed at the bent part of the U-shape, a contact point portion 34B situated on the −Z direction side from the fulcrum portion 34A, and a point-of-effort portion 34C situated on the −Z direction side from the contact point portion 34B and forming a free end. The contact point portion 34B and the point-of-effort portion 34C are disposed to be elastically displaceable in the X direction with respect to the fulcrum portion 34A. The contact point portion 34B contacts the second contact 44 of the second connector 41 when the first connector 31 and the second connector 41 are fitted with each other, and the point-of-effort portion 34C receives a pushing force in the X direction from the push plate 35B of the push member 35.
The first insulator 33 is provided at its +Z directional end with a pair of through-holes 33E communicating with the pair of first contact housing portions 33B. The through-holes 33E receive the corresponding second contacts 44 of the second connector 41 when the first connector 31 and the second connector 41 are fitted to each other.
The base 35A of the push member 35 is housed in the push member housing portion 33C to be movable in the Z direction, and the pair of push plates 35B of the push member 35 are separately housed in the corresponding push plate housing portions 33D. The pair of push plates 35B are each provided at its +Z directional end with a pushing surface 35D facing the corresponding first contact 34. The pair of second pins 35C of the push member 35 protrude separately in the +X direction and the −X direction from the push member housing portion 33C.
The lower shell 37 is disposed at the −Z directional end of the push member housing portion 33C, and the push member 35 is pushed in the +Z direction by the springs 38 disposed between the base 35A and the lower shell 37 and situated at the initial position.
The second insulator 43 of the second connector 41 is provided with a pair of second contact holding portions 43B of recess shape that are adjacent to each other in the X direction and penetrate the second insulator 43 in the Z direction.
The pair of second contacts 44 connected to the ends of the two electric wires C have a flat plate shape and are each housed in the inner insulator 45 and surrounded by the pair of shells 46; in this state, the pair of second contacts 44 are held in the pair of second contact holding portions 43B. The +Z directional portion of each second contact 44 is housed in and held by the second contact holding portion 43B, and the −Z directional portion thereof protrudes in the −Z direction within the second contact holding portion 43B.
Next, the fitting operation between the first connector 31 and the second connector 41 is described.
The lever member 42 is set to the initial rotational position with a rotation angle of the lever member 42 of 0 degrees as shown in
As a consequence, the second insulator 43 of the second connector 41 is situated at the fitting start position with respect to the first insulator 33 of the first connector 31 as shown in
At this time, as shown in
When the lever member 42 is rotated in this state, the first pins 33A of the first connector 31 are inserted into the cam grooves 42D of the lever member 42, and the second insulator 43 of the second connector 41 gradually moves in the −Z direction with respect to the first insulator 33 of the first connector 31.
The push member 35 is kept at the initial position with respect to the first insulator 33 unless the second pins 35C come into contact with the lever member 42 and are pushed thereby in the −Z direction.
When the lever member 42 is rotated to the first rotational position where the handle portion 42A is at an angle of 45 degrees with respect to the Y direction as shown in
Accordingly, as shown in
On the other hand, the push member 35 is held at the initial position with respect to the first insulator 33, and the pushing surfaces 35D of the push plates 35B still do not contact the point-of-effort portions 34C of the first contacts 34.
From this state, when the lever member 42 is rotated to the second rotational position where the handle portion 42A is at an angle of 90 degrees with respect to the Y direction as shown in
On the other hand, the second pins 35C of the push member 35 are pushed in the −Z direction by the peripheral cam surfaces 42E protruding in the radial direction of the circular plate portions 42B of the lever member 42.
Consequently, as shown in
A distance L4 from the fulcrum portion 34A to the point-of-effort portion 34C in the first contact 34 is set longer than a distance L3 from the fulcrum portion 34A to the contact point portion 34B, and therefore, a force greater than a pushing force that the point-of-effort portion 34C receives from the push plate 35B of the push member 35 acts on the contact point portion 34B due to the so-called principle of leverage, and this allows the contact point portion 34B of the first contact 34 to contact the second contact 44 with high contact pressure.
In this manner, when the lever member 42 is rotated from the initial rotational position where the handle portion 42A is at an angle of 0 degrees with respect to the Y direction to the first rotational position where the handle portion 42A is at an angle of 45 degrees with respect to the Y direction, the second insulator 43 of the second connector 41 can be moved from the fitting start position to the fitting position with respect to the first insulator 33 of the first connector 31 while the push member 35 is held at the initial position with respect to the first insulator 33 of the first connector 31 such that the pushing surfaces 35D of the push plates 35B do not contact the point-of-effort portions 34C of the first contacts 34. Thus, the first connector 31 and the second connector 41 can be easily fitted to each other with a small insertion force.
When the lever member 42 is further rotated from the first rotational position to the second rotational position where the handle portion 42A is at an angle of 90 degrees with respect to the Y direction, the push member 35 is retracted from the initial position to the retracted position with respect to the first insulator 33 of the first connector 31 with the second insulator 43 of the second connector 41 being kept at the fitting position with respect to the first insulator 33 of the first connector 31, so that the push plates 35B can push the point-of-effort portions 34C of the first contacts 34 in the X direction, thereby allowing the contact point portions 34B of the first contacts 34 to contact the second contacts 44 with high contact pressure.
At this time, since the first contact 34 and the second contact 44 are pressed against each other in the X direction without rubbing together in the Z direction, the first contact 34 and the second contact 44 are electrically connected to each other while their surfaces are prevented from being damaged.
Thus, it is possible to, while easily fitting the first connector 11 and the second connector 41 to each other, establish contact between the first contacts 34 and the second contacts 44 with high contact pressure, thus achieving reliable electric connection, as with Embodiment 1.
Fitting and detachment between the first connector 51 and the second connector 61 are carried out by operating a lever member 62 rotatably attached to the second connector 61.
For convenience, a direction in which the first connector 51 and the second connector 61 are fitted is defined as “Z direction,” a direction of rotation axis of the lever member 62 attached to the second connector 61 as “X direction,” and a direction perpendicular to the Z direction and the X direction as “Y direction”.
The second connector 61 is moved from the +Z direction toward the −Z direction to be fitted to the first connector 51.
The lower insulator 53L includes a base 53A of flat plate shape extending along an XY plane, and a pair of support portions 53B of flat plate shape that extend in the +Z direction separately from the +X directional end and the −X directional end of the base 53A and face each other in the X direction. A pair of first pins 53C protruding in the X direction are formed on the opposed surfaces of the pair of support portions 53B. While only the first pin 53C formed on the support portion 53B on the −X direction side is shown in
The upper insulator 53U has a substantially rectangular cuboid outer shape and is provided, at its opposite lateral sides in the X direction, with cutouts 53D in which the corresponding first push members 55 are inserted. While only the cutout 53D formed on the +X direction side of the upper insulator 53U is shown in
The first connector 51 further includes a pair of shells 56 fixed inside the upper insulator 53U and disposed to surround the pair of first contacts 54 separately, and a waterproof packing 57 disposed on the bottom of the lower insulator 52 on the −Z direction side.
The second push member 65 is provided at its outer surface with a pair of second pins 65A protruding separately in the +X direction and the −X direction.
The second insulator 63 is provided at its outer surface with a pair of shaft members 63A protruding separately in the +X direction and the −X direction. Further, the second insulator 63 is provided at its outer surface with cutouts 63B which are situated on the −Z direction side from the shaft members 63A and in which the corresponding second pins 65A of the second push member 65 are inserted.
While only the second pin 65A formed on the outer surface of the second push member 65 on the +X direction side and the shaft member 63A and cutout 63B formed on and in the outer surface of the second insulator 63 on the +X direction side are shown in
The lever member 62 includes a handle portion 62A bent in a U-shape, and a pair of circular plate portions 62B separately connected to the opposite ends of the handle portion 62A to face each other in the X direction and extending along a YZ plane. Of the pair of circular plate portions 62B, the outer surfaces facing the opposite directions from each other are each provided with a first cam groove 62D curved in a substantially circular arc shape, and of the pair of circular plate portions 62B, the surfaces facing each other are each provided with a central recess portion 62C and a second cam groove 62E situated outside the central recess portion 62C and curved in a substantially circular arc shape.
While only the first cam groove 62D formed in the circular plate portion 62B on the +X direction side and the central recess portion 62C and second cam groove 62E formed in the circular plate portion 62B on the −X direction side are shown in
The pair of shaft members 63A of the second insulator 63 are inserted in the central recess portions 62C of the pair of circular plate portions 62B, so that the lever member 62 is held to be rotatable with respect to the second insulator 63.
The pair of first pins 53C of the first insulator 53 are inserted in the first cam grooves 62D of the pair of circular plate portions 62B. Those first cam grooves 62D and first pins 53C constitute a first cam mechanism that moves the first insulator 53 and the second insulator 63 relatively along the Z direction in conjunction with rotation of the lever member 62.
In addition, the pair of second pins 65A of the second push member 65 are inserted in the second cam grooves 62E of the pair of circular plate portions 62B. Those second cam grooves 62E and second pins 65A constitute a second cam mechanism that moves the second push member 65 along the Z direction in conjunction with rotation of the lever member 62.
The second connector 61 further includes two pairs of shells 67, each pair surrounding the corresponding inner insulator 66.
The second push member 65 includes a front portion 65B situated on the −Z direction side from the second pins 65A, and a rear portion 65C situated on the +Z direction side from the second pins 65A. A front waterproof packing 68 is disposed on the outer periphery of the front portion 65B, and a rear waterproof packing 69 is disposed on the outer periphery of the rear portion 65C.
As shown in
The pair of second contacts 64 connected to the ends of the two electric wires C have a flat plate shape and are each housed in the inner insulator 66 and surrounded by the pair of shells 67; in this state, the pair of second contacts 64 are held in the pair of second contact holding portions 63C. The +Z directional portion of each second contact 64 is housed in and held by the second contact holding portion 63C, and the −Z directional end thereof protrudes in the −Z direction within the second contact holding portion 63C.
The second insulator 63 is provided at its −Z directional end with a rear portion housing portion 63D of recess shape that opens in the −Z direction. The rear portion 65C of the second push member 65 is housed in the rear portion housing portion 63D to be movable in the Z direction.
A first insulator housing portion 63E of recess shape that opens in the −Z direction is formed between the second insulator 63 and the inner peripheral surface of the tubular second push member 65. Of the inner peripheral surface of the second push member 65, the portions facing each other in the X direction form push-out surfaces 65D that push out the first push members 55 of the first connector 51 in the X direction when the first connector 51 and the second connector 61 are fitted to each other.
In the first insulator 53 of the first connector 51, a front portion housing portion 53E of recess shape that opens in the +Z direction is formed by using the base 53A of the lower insulator 53L.
A pair of first push member housing portions 53F of recess shape are each formed between the cutout 53D of the upper insulator 53U and the base 53A of the lower insulator 53L. The pair of first push members 55 are separately housed in the pair of first push member housing portions 53F to be movable in the X direction. The pair of push members 55 are each provided at its +Z directional end with a pushing surface 55A facing the corresponding first contact 54.
The first insulator 53 of the first connector 51 is provided with a pair of first contact housing portions 53G of recess shape disposed adjacent to each other in the X direction and extending in the Z direction. The pair of first contacts 54 are separately housed in the pair of first contact housing portions 53G.
A pair of through-holes 53H communicating with the pair of first contact housing portions 53G are formed on the +Z direction side of the pair of first contact housing portions 53G. The second contacts 64 of the second connector 61 are inserted in the corresponding through-holes 53H when the first connector 51 and the second connector 61 are fitted with each other.
As shown in
Next, the fitting operation between the first connector 51 and the second connector 61 is described.
The lever member 62 is set to the initial rotational position with a rotation angle of the lever member 62 of 0 degrees as shown in
As a consequence, the second insulator 63 of the second connector 61 is situated at the fitting start position with respect to the first insulator 53 of the first connector 51, and the first pins 53C of the first connector 51 are inserted in the entrances of the first cam grooves 62D of the lever member 62, as shown in
Further, the second pins 65A of the second push member 65 of the second connector 61 are inserted in the second cam grooves 62E of the lever member 62 as shown in
At this time, as shown in
The push members 55 of the first connector 51 are each situated at a first initial position in the X direction with respect to the first insulator 53, and the pushing surfaces 55A of the first push members 55 are in contact with the point-of-effort portions 54C of the first contacts 54.
On the other hand, the second push member 65 of the second connector 61 is situated at a second initial position where the rear portion 65C is inserted up to the deepest part, on the +Z direction side, of the rear portion housing portion 63D of the second insulator 63.
When the lever member 62 is rotated to the first rotational position where the handle portion 62A is at an angle of 45 degrees with respect to the Y direction as shown in
Further, the second pins 65A of the second push member 65 of the second connector 61 are inserted up to the middle portions of the second cam grooves 62E of the lever member 62 as shown in
Accordingly, as shown in
With the movement of the second insulator 63 with respect to the first insulator 53, the second push member 65 also moves in the −Z direction with respect to the first push members 55 held by the first insulator 53 but keeps the second initial position with respect to the second insulator 63; thus, the push-out surfaces 65D of the second push member 65 do not reach the first push members 55 yet, and the first push members 55 still keep the first initial position with respect to the first insulator 53.
From this state, when the lever member 62 is rotated to the second rotational position where the handle portion 62A is at an angle of 90 degrees with respect to the Y direction as shown in
Further, the second pins 65A of the second push member 65 are also inserted up to the deepest parts of the second cam grooves 62E of the lever member 62 as shown in
Consequently, as shown in
A distance L6 from the fulcrum portion 54A to the point-of-effort portion 54C in the first contact 54 is set longer than a distance L5 from the fulcrum portion 54A to the contact point portion 54B, and therefore, a force greater than a pushing force that the point-of-effort portion 54C receives from the pushing surface 55A of the first push member 55 acts on the contact point portion 54B due to the so-called principle of leverage, and this allows the contact point portion 54B of the first contact 54 to contact the second contact 64 with high contact pressure.
In addition, a space between the outer periphery of the front portion 65B of the second push member 65 and the inner peripheral surface of the front portion housing portion 53E of the first insulator 53 is sealed owing to the presence of the front waterproof packing 68, and similarly, a space between the outer periphery of the rear portion 65C of the second push member 65 and the inner peripheral surface of the rear portion housing portion 63D of the second insulator 63 is sealed owing to the presence of the rear waterproof packing 69. Thus, water is prevented from entering the connected parts between the first contacts 54 and the second contacts 64 from the outside.
In this manner, when the lever member 62 is rotated from the initial rotational position where the handle portion 62A is at an angle of 0 degrees with respect to the Y direction to the first rotational position where the handle portion 62A is at an angle of 45 degrees with respect to the Y direction, the second insulator 63 of the second connector 61 can be moved from the fitting start position to the fitting position with respect to the first insulator 53 of the first connector 51 while the first push members 55 are held at the first initial position and the second push member 65 is also held at the second initial position such that the pushing surfaces 55A of the first push members 55 do not push the point-of-effort portions 54C of the first contacts 54. Thus, the first connector 51 and the second connector 61 can be easily fitted to each other with a small insertion force.
When the lever member 62 is further rotated from the first rotational position to the second rotational position where the handle portion 62A is at an angle of 90 degrees with respect to the Y direction, the second push member 65 is advanced from the second initial position to the advanced position with respect to the second insulator 63 with the second insulator 63 of the second connector 61 being kept at the fitting position with respect to the first insulator 53 of the first connector 51, and this allows the first push members 55 to move from the first initial position to the jutting position with respect to the first insulator 53, which allows the pushing surfaces 55A of the first push members 55 to push the point-of-effort portions 54C of the first contacts 54 in the X direction, so that the contact point portions 54B of the first contacts 54 can contact the second contacts 64 with high contact pressure.
At this time, since the first contact 54 and the second contact 64 are pressed against each other in the X direction without rubbing together in the Z direction, the first contact 54 and the second contact 64 are electrically connected to each other while their surfaces are prevented from being damaged.
Thus, it is possible to, while easily fitting the first connector 51 and the second connector 61 to each other, establish contact between the first contacts 54 and the second contacts 64 with high contact pressure, thus achieving reliable electric connection, as with Embodiments 1 and 2.
Furthermore, water can be prevented from entering the connected parts between the first contacts 54 and the second contacts 64 from the outside owing to the presence of the front waterproof packing 68 and the rear waterproof packing 69.
Fitting and detachment between the first connector 71 and the second connector 81 are carried out by operating a lever member 72 rotatably attached to the first connector 71.
For convenience, a direction in which the first connector 71 and the second connector 81 are fitted is defined as “Z direction,” a direction of rotation axis of the lever member 72 attached to the first connector 71 as “X direction,” and a direction perpendicular to the Z direction and the X direction as “Y direction”.
The second connector 81 is moved from the +Z direction toward the −Z direction to be fitted to the first connector 71.
The lower insulator 73L includes a base 73A of flat plate shape extending along an XY plane, and a pair of support portions 73B of flat plate shape that extend in the +Z direction separately from the +X directional end and the −X directional end of the base 73A and face each other in the X direction. A pair of shaft members 73C protruding in the X direction are formed on the opposed surfaces of the pair of support portions 73B. While only the shaft member 73C formed on the support portion 73B on the −X direction side is shown in
The surface of the base 73A on the +Z direction side forms an abutment surface 73D.
The upper insulator 73U has a substantially rectangular cuboid outer shape. The upper insulator 73U is provided in its inside with a pair of first contact housing portions, which will be described later, for housing the pair of first contacts 74 and also provided at its +Z directional end with a pair of through-holes 73E communicating with the pair of first contact housing portions.
The lever member 72 includes a handle portion 72A bent in a U-shape, and a pair of circular plate portions 72B separately connected to the opposite ends of the handle portion 72A to face each other in the X direction and extending along a YZ plane. Of the pair of circular plate portions 72B, the outer surfaces facing the opposite directions from each other are each provided with a central recess portion 72C, and of the pair of circular plate portions 72B, the surfaces facing each other are each provided with a first cam groove 72D curved in a substantially circular arc shape and a second cam groove 72E situated on the opposite side from the first cam groove 72D with respect to the center of the circular plate portion 72B and curved in a substantially circular arc shape.
The pair of shaft members 73C of the lower insulator 73L are inserted in the central recess portions 72C of the pair of circular plate portions 72B, so that the lever member 72 is held to be rotatable with respect to the lower insulator 73L.
While only the central recess portion 72C formed in the circular plate portion 72B on the +X direction side and the first cam groove 72D and second cam groove 72E formed on the circular plate portion 72B on the −X direction side are shown in
The push member 75 has a tubular shape and is provided at its outer surface with a pair of second pins 75A protruding separately in the +X direction and the −X direction. While only the second pin 75A formed on the outer surface of the push member 75 on the +X direction side is shown in
The push member 75 includes a front portion 75B situated on the +Z direction side from the second pins 75A, and a rear portion 75C situated on the −Z direction side from the second pins 75A.
The first connector 71 further includes a pair of shells 76 separately surrounding the pair of first contacts 74, and a waterproof packing 77 disposed on the surface of the lower insulator 73L on the −Z direction side.
The first connector 71 further includes a front waterproof packing 78 disposed on the outer periphery of the front portion 75B of the push member 75, and a rear waterproof packing 79 disposed on the rear end surface, which faces in the −Z direction, of the rear portion 75C of the push member 75.
The second insulator 83 is provided at its outer surface with a pair of first pins 83A protruding separately in the +X direction and the −X direction. While only the first pin 83A formed on the outer surface of the second insulator 83 on the +X direction side is shown in
The second insulator 83 is further provided with a pair of second contact housing portions 83B for housing the pair of second contacts 84, the second contact housing portions 83B penetrating the second insulator 83 in the Z direction.
The pair of first pins 83A of the second insulator 83 are inserted in the first cam grooves 72D of the pair of circular plate portions 72B of the lever member 72. Those first cam grooves 72D and first pins 83A constitute a first cam mechanism that moves the first insulator 73 and the second insulator 83 relatively along the Z direction in conjunction with rotation of the lever member 72.
In addition, the pair of second pins 75A of the push member 75 are inserted in the second cam grooves 72E of the pair of circular plate portions 72B of the lever member 72. Those second cam grooves 72E and second pins 75A constitute a second cam mechanism that moves the push member 75 along the Z direction in conjunction with rotation of the lever member 72.
Next, the fitting operation between the first connector 71 and the second connector 81 is described.
The lever member 72 is set to the initial rotational position with a rotation angle of the lever member 72 of 0 degrees as shown in
As a consequence, the second insulator 83 of the second connector 81 is situated at the fitting start position with respect to the first insulator 73 of the first connector 71 as shown in
At this time, as shown in
Each of the first contacts 74 housed in the first contact housing portions 73F is formed of a spring contact bent in a U-shape and includes a fulcrum portion 74A formed at the bent part of the U-shape, a contact point portion 74B situated on the −Z direction side from the fulcrum portion 74A, and a point-of-effort portion 74C situated on the −Z direction side from the contact point portion 74B and forming a free end. At this time, the second contacts 84 do not reach the position where the second contacts 84 face the contact point portions 74B of the first contacts 74 yet.
A front portion housing portion 83D is formed between the inner peripheral surface of the first insulator housing portion 83C of the second insulator 83 and the outer peripheral surface 73G of the upper insulator 73U. The front portion 75B of the push member 75 is housed in the deepest part, on the +Z direction side, of the front portion housing portion 83D, and the push member 75 is situated at the initial position with respect to the first insulator 73. The push member 75 has pushing surfaces 75D protruding in the X direction toward the first contacts 74, and at this time, the pushing surfaces 75D do not contact the point-of-effort portions 74C of the first contacts 74.
When the lever member 72 is rotated to the first rotational position where the handle portion 72A is at an angle of 45 degrees with respect to the Y direction as shown in
The second pins 75A of the push member 75 move from the deepest parts to the middle parts of the second cam grooves 72E of the lever member 72, but the push member 75 with respect to the first insulator 73 does not change and keeps the initial position due to the shape of the second cam grooves 72E.
Accordingly, as shown in
Further, the push member 75 is held at the initial position with respect to the first insulator 73, and the pushing surfaces 75D of the push member 75 still do not contact the point-of-effort portions 74C of the first contacts 74.
From this state, when the lever member 72 is rotated to the second rotational position where the handle portion 72A is at an angle of 90 degrees with respect to the Y direction as shown in
On the other hand, the second pins 75A of the push member 75 relatively move along the second cam grooves 72E of the lever member 72 toward the entrances thereof, and the push member 75 moves in the −Z direction with respect to the first insulator 73.
Consequently, as shown in
A distance L8 from the fulcrum portion 74A to the point-of-effort portion 74C in the first contact 74 is set longer than a distance L7 from the fulcrum portion 74A to the contact point portion 74B, and therefore, a force greater than a pushing force that the point-of-effort portion 74C receives from the pushing surface 75D of the push member 75 acts on the contact point portion 74B due to the so-called principle of leverage, and this allows the contact point portion 74B of the first contact 74 to contact the second contact 84 with high contact pressure.
In addition, a space between the outer periphery of the front portion 75B of the push member 75 and the inner peripheral surface of the front portion housing portion 83D of the second insulator 83 is sealed owing to the presence of the front waterproof packing 78, and similarly, a space between the rear end surface of the rear portion 75C of the push member 75 and the abutment surface 73D of the first insulator 73 is sealed owing to the presence of the rear waterproof packing 79. Thus, water is prevented from entering the connected parts between the first contacts 74 and the second contacts 84 from the outside.
In this manner, when the lever member 72 is rotated from the initial rotational position where the handle portion 72A is at an angle of 0 degrees with respect to the Y direction to the first rotational position where the handle portion 72A is at an angle of 45 degrees with respect to the Y direction, the second insulator 83 of the second connector 81 can be moved from the fitting start position to the fitting position with respect to the first insulator 73 of the first connector 71 while the push member 75 is held at the initial position with respect to the first insulator 73 of the first connector 71 such that the pushing surfaces 75D of the push member 75 do not push the point-of-effort portions 74C of the first contacts 74. Thus, the first connector 71 and the second connector 81 can be easily fitted to each other with a small insertion force.
When the lever member 72 is further rotated from the first rotational position to the second rotational position where the handle portion 72A is at an angle of 90 degrees with respect to the Y direction, the push member 75 is retracted from the initial position to the retracted position with respect to the first insulator 73 of the first connector 71 with the second insulator 83 of the second connector 81 being kept at the fitting position with respect to the first insulator 73 of the first connector 71, so that the pushing surfaces 75D of the push member 75 can push the point-of-effort portions 74C of the first contacts 74 in the X direction, thereby allowing the contact point portions 74B of the first contacts 74 to contact the second contacts 84 with high contact pressure.
At this time, since the first contact 74 and the second contact 84 are pressed against each other in the X direction without rubbing together in the Z direction, the first contact 74 and the second contact 84 are electrically connected to each other while their surfaces are prevented from being damaged.
Thus, it is possible to, while easily fitting the first connector 71 and the second connector 81 to each other, establish contact between the first contacts 74 and the second contacts 84 with high contact pressure, thus achieving reliable electric connection, as with Embodiments 1 to 3.
Furthermore, water can be prevented from entering the connected parts between the first contacts 74 and the second contacts 84 from the outside owing to the presence of the front waterproof packing 78 and the rear waterproof packing 79.
The lower insulator 93L has the same configuration as the lower insulator 73L used for the first connector 71 in Embodiment 4 except that, in the lower insulator 73L, the pair of support portions 73B are replaced by a pair of circular support portions 93B. While each support portion 73B is provided with one shaft member 73C in the lower insulator 73L, each support portion 93B of the lower insulator 93L has a pair of shaft members (not shown) protruding separately in the +X direction and −X direction in Embodiment 5.
As shown in
Of the pair of circular plate portions 92B, the outer surfaces facing the opposite directions from each other are each further provided with a first gear 92F in which a plurality of teeth protruding in the X direction are circularly arranged along the outer periphery of the circular plate portion 92B.
A pair of electric wire holding portions 92G adjacent to each other in the X direction and recessed in a semicircular shape are formed in the handle portion 92A at the top of the U-shape farthest away from the pair of circular plate portions 92B.
As shown in
Of the pair of circular plate portions 94B, the inner surfaces facing each other are each provided with a central recess portion 94C.
Of the pair of circular plate portions 94B, the inner surfaces facing each other are each further provided with a second gear 94F in which a plurality of teeth protruding in the X direction are circularly arranged along the outer periphery of the circular plate portion 94B. The second gears 94F have the same size and the same arrangement pitch as those of the first gears 92F formed on the pair of circular plate portions 92B of the lever member 92.
A pair of electric wire holding portions 94G adjacent to each other in the X direction and recessed in a semicircular shape are formed in the handle portion 94A at the top of the U-shape farthest away from the pair of circular plate portions 94B.
The pair of shaft members (not shown) protruding separately in the +X direction and −X direction from each of the pair of support portions 93B of the lower insulator 93L are correspondingly inserted into the central recess portions 92C of the pair of circular plate portions 92B of the lever member 92 and the central recess portions 94C of the pair of circular plate portions 94B of the auxiliary lever member 94, whereby the lever member 92 and the auxiliary lever member 94 are held to be rotatable with respect to the lower insulator 93L. The pair of circular plate portions 92B of the lever member 92 are disposed on the inner side from the pair of support portions 93B of the lower insulator 93L, and the pair of circular plate portions 94B of the auxiliary lever member 94 are disposed on the outer side from the pair of support portions 93B of the lower insulator 93L.
An intermediate gear 95 is attached at the +Z directional end of the support portion 93B to be rotatable in an XY plane around the central axis extending in the Z direction, as shown in
As shown in
In the state where the second insulator 83 of the second connector 81 is situated at the fitting start position with respect to the first connector 91, when the lever member 92 is rotated to the second rotational position where the handle portion 92A is at an angle of 90 degrees with respect to the Y direction as shown in
Consequently, the two electric wires C connected to the second connector 81 are sandwiched between the electric wire holding portions 92G of semicircular shape formed in the handle portion 92A of the lever member 92 and the electric wire holding portions 94G of semicircular shape formed in the handle portion 94A of the auxiliary lever member 94 and thereby held by the lever member 92 and the auxiliary lever member 94.
Therefore, it is possible to restrict movement of the two electric wires C connected to the second connector 81 fitted to the first connector 91 even when an external force such as vibration acts on an electric device on which the first connector 91 is mounted.
The first gear 92F of the circular plate portion 92B of the lever member 92 and the second gear 94F of the circular plate portion 94B of the auxiliary lever member 94 may be configured to directly mesh with each other without the intermediate gear 95 such that the second gear 94F is rotated in conjunction with rotation of the first gear 92F.
While, in Embodiments 1 to 5 above, the initial rotational position, the first rotational position, and the second rotational position of the lever member 22, 42, 62, 72, 92 are defined to correspond to rotation angles of the lever member 22, 42, 62, 72, 92 of 0 degrees, 45 degrees, and 90 degrees, respectively, the invention is not limited thereto, and those rotational positions may be defined to correspond to other rotational angles.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2022-034194 | Mar 2022 | JP | national |
