JP2013171704A - Elastic seal member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic seal member that can be prevented from decreasing in waterproofing capability even when an electric wire is loaded with external force.SOLUTION: An elastic seal member 1 having a terminal insertion hole 11 for inserting a terminal 111 with an electric wire from the outside to the inside of a waterproof container 100 includes: a seal body part 10 which is mounted in an opening 100a of the waterproof container 100 on an insertion side for the terminal 111 with the electric wire, and also has the terminal insertion hole 11 formed penetrating from the outside to the inside of the waterproof container 100; a cylindrical electric wire contact part 30 arranged in the terminal insertion hole 11 and has the electric wire W inserted in contact with a cylinder inner peripheral surface 30a; and an elastic support part 50 which is provided projecting in a peripheral direction of a hole inner peripheral surface 11a of the terminal insertion hole 11, formed such that a width T1 of a projection part in an axis C1 direction of the terminal insertion hole 11 is shorter than a width T2 in an axis C3 direction of the cylindrical electric wire contact part 30, and also formed integrally with the cylindrical electric wire contact part 30 in a peripheral direction of a cylinder outer peripheral surface 30b of the cylindrical electric wire contact part 30.

Description

  The present invention relates to an elastic seal member having a terminal insertion hole through which a terminal with an electric wire, which is a terminal connected to an electric wire, is inserted from the outside into a waterproof container.

  Conventionally, when a terminal with an electric wire that is a terminal connected to an electric wire is accommodated in a waterproof container having waterproof properties, a terminal with an electric wire that is a terminal connected to the electric wire is inserted into the waterproof container from the outside. An elastic seal member having a terminal insertion hole is provided. For example, Patent Document 1 proposes a waterproof connector in which an elastic seal member that covers a wire while inserting an electric wire is provided in an end opening on the female housing terminal insertion side.

  In the elastic sealing member described in Patent Document 1, a plurality of lip portions having a cross-sectional shape are formed on the inner peripheral surface of the terminal insertion hole, and the plurality of lip portions are elastically adhered to the outer peripheral surface of the electric wire. This prevents water from entering the female housing.

JP 2005-158595 A

  However, as shown in FIG. 11, in the elastic seal member 500 described in Patent Document 1, when an external force is applied to the electric wire W, the axis of the electric wire W is shifted with respect to the axis C1 of the terminal insertion hole 510, and the terminal insertion is performed. The outer peripheral surface W1 of the electric wire W is non-uniformly contacted with each lip portion 520 formed on the inner peripheral surface of the hole 510, so that the outer periphery of the electric wire W is separated from the lip portion 520a on the side away from the electric wire W. Adhesion with the surface W1 is weakened, and as a result, the waterproof performance may be deteriorated.

  This invention is made | formed in view of the above, Comprising: It is an object to provide the elastic seal member which can prevent that waterproof performance falls even if it is a case where external force is loaded on the electric wire. .

  In order to solve the above-described problems and achieve the object, the elastic seal member according to claim 1 of the present invention is for inserting a terminal with an electric wire, which is a terminal connected to an electric wire, from the outside into a waterproof container. In the elastic seal member having a terminal insertion hole, it is attached to the opening of the waterproof container on the insertion side of the terminal with electric wire, and the terminal insertion hole penetrates from the outside toward the inside of the waterproof container. A seal main body formed in the terminal insertion hole, a cylindrical tubular electric wire contact portion that is inserted in close contact with the inner peripheral surface of the cylinder, and a hole in the terminal insertion hole Protruding along the circumferential direction of the peripheral surface, the width of the protruding portion in the axial direction of the terminal insertion hole is shorter than the axial width of the cylindrical electric wire contact portion, and the tube The cylindrical electric wire is adhered along the circumferential direction of the outer circumferential surface of the cylindrical electric wire contact portion. And characterized by having an elastic support portion made of integrally formed, the a.

  The elastic seal member according to claim 2 of the present invention is the elastic seal member according to the above invention, wherein the cylindrical electric wire contact portion is formed in a plurality of circular arc shapes whose axial cross-section is convex toward the inside of the cylinder. An arc-shaped close contact portion is provided side by side in the axial direction.

  In the elastic seal member according to claim 3 of the present invention, in the above invention, the elastic support portion is provided at a substantially central position of the tubular electric wire contact portion in the axial direction of the terminal insertion hole. It is characterized by that.

  An elastic seal member according to claim 1 of the present invention is a seal main body having a terminal insertion hole which is attached to the opening of the waterproof container and is formed so that the terminal-attached electric wire can be inserted therethrough, and the terminal A cylindrical tubular electric wire contact portion that is disposed in the insertion hole and is inserted in close contact with the inner peripheral surface of the cylinder, and protrudes along the circumferential direction of the inner peripheral surface of the hole of the electric wire insertion hole. A width of the protruding portion in the axial direction of the terminal insertion hole is shorter than an axial width of the cylindrical electric wire contact portion, and in a circumferential direction of a cylindrical outer peripheral surface of the cylindrical electric wire contact portion. And an elastic support portion formed integrally with the tubular electric wire contact portion along the axis, so that when the external force is applied to the electric wire, the axis of the electric wire becomes the axis of the terminal insertion hole. Even if it is displaced with respect to the cylindrical electric power, the elastic support portion is elastically deformed, thereby Since the contact portion can follow the movement of the electric wire and maintain the state where the axis of the electric wire and the axis of the cylindrical electric wire contact portion coincide with each other, the outer peripheral surface of the electric wire and the cylindrical electric wire contact portion The state of close contact with the inner circumferential surface of the cylinder is maintained. That is, even when an external force is applied to the electric wire, it is possible to prevent the waterproof performance from deteriorating.

  The elastic seal member according to claim 2 of the present invention has the same effect as that of claim 1 described above, and the cylindrical electric wire contact portion is formed in an arc shape having a convex cross section in the axial direction toward the inside of the cylinder. Since the plurality of arc-shaped contact portions formed in the axial direction are provided side by side, the upper portion of the arc-shaped contact portion has elasticity and is pressed against the outer peripheral surface of the wire. The cylinder inner peripheral surface of the close contact portion can be easily adhered to the outer peripheral surface of the electric wire, and as a result, the waterproof performance can be improved.

  The elastic seal member according to a third aspect of the present invention has the same effect as that of the first aspect described above, and the elastic support portion is in the axial direction of the terminal insertion hole, and is substantially at the center position of the tubular electric wire contact portion. Since the cylindrical wire contact portion is evenly supported by the elastic support portion in the axial direction of the terminal insertion hole, the cylindrical wire contact portion easily follows the movement of the wire. The close contact state between the outer peripheral surface of the electric wire and the inner peripheral surface of the cylindrical electric wire contact portion is easily maintained.

FIG. 1 is a cross-sectional view of an essential part showing an elastic seal member according to an embodiment of the present invention, a connector housing in which water is prevented from entering the interior by the elastic seal member, and a terminal with an electric wire. FIG. 2 is a perspective view of the elastic seal member shown in FIG. FIG. 3 is a front view of the elastic seal member shown in FIG. 4 is an enlarged view of the terminal insertion hole shown in FIG. FIG. 5 is a top view of the elastic seal member shown in FIG. 6 is a side view of the elastic seal member shown in FIG. 7 is a partial cross-sectional view of the elastic seal member shown in FIG. 8 is a cross-sectional view of the elastic seal member shown in FIG. 3 taken along line BB. FIG. 9 is an enlarged view of the vicinity of the wire insertion hole of the elastic seal member shown in FIG. FIG. 10 is a diagram for explaining that the tubular electric wire contact portion follows the movement of the electric wire. FIG. 11 is a diagram for explaining the prior art.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an elastic seal member according to the present invention will be described in detail with reference to the drawings.

(Embodiment)
FIG. 1 is a cross-sectional view of a principal part showing an elastic seal member 1 according to an embodiment of the present invention, a connector housing 100 from which the electric wire W is pulled out by the elastic seal member 1 in a waterproof manner, and the electric wire W. FIG. 2 is a perspective view of the elastic seal member 1 shown in FIG. FIG. 3 is a front view of the elastic seal member 1 shown in FIG. 4 is an enlarged view of the terminal insertion hole 11 shown in FIG. FIG. 5 is a top view of the elastic seal member 1 shown in FIG. FIG. 6 is a side view of the elastic seal member 1 shown in FIG. FIG. 7 is a view showing a partial cross section of the elastic seal member 1 shown in FIG. 8 is a cross-sectional view of the elastic seal member 1 shown in FIG. FIG. 9 is an enlarged view of the vicinity of the wire insertion hole 11 of the elastic seal member 1 shown in FIG.

As shown in FIG. 1, the elastic seal member 1 according to the embodiment of the present invention prevents water from entering the connector housing 100 as a waterproof container. In this embodiment, the connector housing 100 is accommodated in a plurality of terminals 111 with electric wires housed therein and a mating connector housing (not shown) by being fitted with a mating connector housing (not shown). A plurality of mating terminals (not shown) are connected.
Further, in this embodiment, the elastic seal member 1 is attached to the opening 100a of the connector housing 100 on the insertion side of the terminal with wire 111 of the connector housing 100, and is sandwiched between the seal member holding portion 120 and the connector housing 100. As a result, it is held in the housing 100.

Hereinafter, the elastic seal member 1 will be described more specifically.
The elastic seal member 1 is made of an elastic material such as a rubber material, and the seal body 10, the tubular electric wire contact portion 30, and the elastic support portion 50 are integrally formed.

The seal body 10 is attached to the opening 100 a of the connector housing 100. More specifically, the seal body 10 has a substantially rectangular cross-sectional shape corresponding to the shape of the inner peripheral surface forming the rectangular shape of the opening 100a.
Further, the seal main body 10 includes a plurality of terminal insertion holes 11 through which the wire-equipped terminals 111 are inserted into the connector housing 100 from the outside.

The terminal insertion hole 11 is a through hole formed in the seal body 10 along the insertion direction of each wire-equipped terminal 111. In this embodiment, the terminal insertion holes 11 are formed at 15 locations on the surface of the seal body 10 so as to be aligned in the vertical and horizontal directions.
The diameter of each terminal insertion hole 11 is set so that the terminal-attached electric wire 111 is inserted. More specifically, the hole diameter of each terminal insertion hole 11 is set in consideration of the elastic support portion 50 and the tubular wire contact portion 30 provided in the hole.

  Further, the side outer peripheral surface 10a of the seal main body 10 is formed with lip portions 10b having a mountain-shaped cross section along the thickness direction, and the side outer peripheral surface 10a is the inner periphery of the insertion port 100a. It comes in close contact with the surface 100b.

  In addition, although the seal | sticker main-body part 10 illustrated what formed the terminal penetration hole 11 in 15 places, the number of the terminal penetration holes 11 is not restricted to this. That is, the terminal insertion hole 11 may be formed according to the number of terminals 111 with electric wires inserted into the connector housing 100. For example, if the number of the terminals 111 with electric wires inserted into the connector housing 100 is one, the terminal insertion hole 11 may be formed at one location of the seal body 10.

Next, the cylindrical electric wire adhesion part 30 is demonstrated.
The cylindrical electric wire contact portion 30 is a cylindrical member that is disposed in each terminal insertion hole 11 and through which the electric wire W is inserted in close contact with the inner circumferential surface 30a.
As shown in FIG. 8, the cylindrical electric wire contact portion 30 includes two rows of arc-shaped contact portions 31 each having a cross section in the axis C3 direction formed into a convex arc shape toward the inside of the tube in the axis C3 direction. It is provided with. Each arcuate contact portion 31 is configured such that the inner circumferential surface 30a of the circular arc-shaped upper portion 31a is brought into close contact with the outer circumferential surface W1 of the electric wire W when the upper arc portion 31a is pressed against the outer circumferential surface W1 of the electric wire W.

  More specifically, the arc upper portion 31a is formed so as to protrude so as to contact the outer peripheral surface W1 of the electric wire W, and the arc upper portion 31a of the arc-shaped close contact portion 31 is elastically pressed against the outer peripheral surface W1 of the electric wire W. Thus, the inner circumferential surface 30a of the tubular electric wire contact portion 30 is brought into close contact with the outer peripheral surface W1 of the electric wire W.

Next, the elastic support part 50 is demonstrated.
The elastic support part 50 supports the cylindrical electric wire contact part 30 in each terminal insertion hole 11.
More specifically, as shown in FIG. 8, the elastic support portion 50 is provided so as to protrude along the circumferential direction of the hole inner peripheral surface 11 a of each terminal insertion hole 11, and the protruding portion of the terminal insertion hole 11. A width T1 in the direction of the axis C1 is formed shorter than a width T2 in the direction of the axis C3 of the cylindrical electric wire contact portion 30 and the cylindrical electric wire extends along the circumferential direction of the cylindrical outer peripheral surface 30b of the cylindrical electric wire contact portion 30. It is formed integrally with the close contact part 31.

  Further, the elastic support portion 50 is provided at substantially the center position of the tubular wire contact portion 30 in the direction of the axis C1 of the wire insertion hole 11. For this reason, the cylindrical electric wire contact portion 30 is uniformly supported by the elastic support portion 50 in the direction of the axis C1 of the terminal insertion hole 11.

  The elastic support portion 50 is provided at a position away from the center position of the tubular wire contact portion 30 in the direction of the axis C1 of the terminal insertion hole 11 if the tubular wire contact portion 30 can be elastically deformed. It does not matter.

  The elastic support portion 50 is provided so as to project along the circumferential direction of the hole inner peripheral surface 11 a of the terminal insertion hole 11 and along the circumferential direction of the cylindrical outer peripheral surface 30 b of the cylindrical electric wire contact portion 31. Since it is formed integrally with the tubular electric wire contact portion 30, the space between the inner peripheral surface 11 a of the terminal insertion hole 11 and the outer peripheral surface 30 b of the tubular electric wire contact portion 30 is closed.

In such an elastic seal member 1, the elastic support portion 50 is elastically deformed even when the axis C <b> 2 of the electric wire W is displaced with respect to the axis C <b> 1 of the terminal insertion hole 11 by applying an external force to the electric wire W. By this, since the cylindrical electric wire contact part 30 is followed by the movement of the electric wire W, the state where the axis C2 of the electric wire W and the axis C3 of the cylindrical electric wire contact part 30 are matched can be maintained. The contact state between the outer peripheral surface W1 and the cylinder inner peripheral surface 30a of the cylindrical electric wire contact portion 30 is maintained.
In addition, since the elastic support member 50 is provided in the axial direction of the terminal insertion hole 11 at substantially the center position of the tubular electric wire contact portion 30, the elastic wire contact portion 30 moves the electric wire W. It is easy to follow.

Here, it will be described with reference to FIG. 10 that the tubular wire contact portion 30 follows the movement of the wire W. FIG. 10 is a diagram for explaining that the tubular electric wire contact portion 30 follows the movement of the electric wire W. FIG.
10A is a diagram showing a state where the electric wire W is held along the direction of the axis C3 of the cylindrical electric wire contact portion 30. FIG. FIG. 10B is a diagram illustrating a state in which an external force is applied and the axis C <b> 2 of the electric wire W is displaced from the axis C <b> 1 of the terminal insertion hole 11.

  When no external force is applied to the electric wire W and the electric wire W is in a predetermined holding position in the terminal insertion hole 11, the axis C <b> 1 of the terminal insertion hole 11, the axis C <b> 2 of the electric wire W, and the axis of the tubular electric wire contact portion 30. Since C3 is located, the cylindrical inner peripheral surface 30a of the cylindrical electric wire contact portion 30 and the outer peripheral surface W1 of the electric wire W are in close contact with each other (see FIG. 10A).

  When an external force is applied to the electric wire W from the state of FIG. 10A and the axis C2 of the electric wire W is displaced with respect to the axis C1 of the terminal insertion hole 11, the cylindrical electric wire contact portion 30 becomes the elastic support portion 50. The electric wire W and the axis are followed so as to coincide with each other while being supported by. For this reason, even if it is a case where external force is loaded to the electric wire W, the contact | adherence state of the cylinder inner peripheral surface 30a of the cylindrical electric wire contact | adherence part 30 and the outer peripheral surface W1 of the electric wire W is maintained.

  The elastic seal member 1 according to the embodiment of the present invention is a seal main body having a terminal insertion hole 11 that is fitted into the insertion port 100a of the connector housing 100 and into which the terminal 111 with electric wire can be inserted. 10, a cylindrical tubular electric wire contact portion 30 that is disposed in the terminal insertion hole 11, and the electric wire W is inserted in close contact with the inner peripheral surface 30 a of the tube, and the inner peripheral surface 11 a of the electric wire insertion hole 11. And the width T1 of the protruding portion of the terminal insertion hole 11 in the direction of the axis C1 is shorter than the width T2 of the cylindrical wire contact portion 30 in the direction of the axis C3. Since it has the elastic support part 50 formed integrally with the cylindrical electric wire contact | adherence part 30 along the circumferential direction of the cylinder outer peripheral surface 30b of the electric wire contact | adherence part 30, external force is loaded to the electric wire W. Thus, the axis C2 of the electric wire W is changed to the axis C1 of the terminal insertion hole 11. Even if it deviates, the elastic support part 50 is elastically deformed, so that the cylindrical electric wire contact part 30 follows the movement of the electric wire W, and the axis C2 of the electric wire W and the axis C3 of the cylindrical electric wire contact part 30 Therefore, the contact state between the outer peripheral surface W1 of the electric wire W and the inner peripheral surface 30a of the cylindrical electric wire contact portion 30 is maintained. That is, even when an external force is applied to the electric wire W, it is possible to prevent the waterproof performance from deteriorating.

  Further, the elastic seal member 1 according to the first embodiment of the present invention has a plurality of arcuate shapes in which the tubular electric wire contact portion 30 is formed in an arc shape having a cross section in the direction of the axis C3 toward the inside of the cylinder. Since the close contact portion 31 is provided side by side in the direction of the axis C3, the circular arc upper portion 31a has elasticity and is pressed against the outer peripheral surface W1 of the electric wire W, whereby the cylindrical inner peripheral surface 30a of the tubular electric wire close contact portion 30 is provided. Is easily adhered to the outer peripheral surface W1 of the electric wire W, and as a result, the waterproof performance can be improved.

  In addition, the elastic seal member 1 according to the first embodiment of the present invention has the elastic support portion 50 provided in the direction of the axis C1 of the electric wire insertion hole 11 and substantially at the center position of the cylindrical electric wire contact portion 30. The wire-like wire contact portion 30 is evenly supported by the elastic support portion 50 in the direction of the axis C1 of the wire insertion hole 11 so that the tubular wire contact portion 30 can easily follow the movement of the wire W, and the outer peripheral surface W1 of the wire W and the tube It is easy to maintain a close contact state with the cylindrical inner peripheral surface 30a of the wire-like contact portion 30.

  The elastic seal member 1 according to the embodiment of the present invention has an arcuate contact portion 31 in which the tubular wire contact portion 30 is formed in a convex arc shape with a cross section in the axis C3 direction facing the inside of the tube. Although what has is illustrated, it is not restricted to this. That is, as long as the inner peripheral surface 30a of the cylindrical electric wire contact portion 30 is in close contact with the outer peripheral surface W1 of the electric wire W, other shapes may be used. For example, as long as the cylindrical electric wire contact portion 30 is made of an elastic material that allows the electric wire W to be easily inserted into the cylinder and is easily adhered, the inner diameter of the cylinder may be constant and not change.

  Moreover, although the elastic sealing member 1 concerning embodiment of this invention illustrated what was attached to the connector housing 100 as a waterproof container, it is not restricted to this. That is, you may attach to another waterproof container. For example, you may attach to waterproof housings, such as an illuminating device.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment of the invention described above, but the invention is not limited to the embodiment of the invention described above, and departs from the gist thereof. Various changes can be made without departing from the scope.

DESCRIPTION OF SYMBOLS 1 Elastic seal member 10 Seal main-body part 10a Side part outer peripheral surface 10b Lip part 11 Terminal insertion hole 11a Hole inner peripheral surface 30 Cylindrical electric wire contact part 30a Cylinder inner peripheral surface 30b Cylinder outer peripheral surface 31 Arc-shaped close contact part 31a Arc upper part 50 Elasticity Support part 100 Connector housing 100a Opening 100b Inner peripheral surface 111 Terminal with electric wire 120 Seal member holding part 500 Elastic seal member 510 Electric wire insertion hole 520, 520a Lip part C1, C2, C3 shaft T1, T2 width W electric wire W1 outer peripheral surface

Claims (3)

In the elastic seal member having a terminal insertion hole for inserting a terminal with an electric wire, which is a terminal connected to the electric wire, into the waterproof container,
A seal body that is attached to the opening of the waterproof container on the insertion side of the terminal with electric wires, and is formed so that the terminal insertion hole penetrates from the outside into the waterproof container;
A cylindrical tubular electric wire contact portion that is disposed in the terminal insertion hole, and the electric wire is inserted in close contact with the inner peripheral surface of the cylinder;
Protruding along the circumferential direction of the inner circumferential surface of the terminal insertion hole, the width of the protruding portion in the axial direction of the terminal insertion hole is larger than the axial width of the tubular wire contact portion An elastic support portion formed short and formed integrally with the tubular electric wire contact portion along the circumferential direction of the outer peripheral surface of the tubular electric wire contact portion;
An elastic seal member comprising: The cylindrical electric wire adhesion part is
The elastic sealing member according to claim 1, wherein a plurality of arc-shaped close contact portions each having an axial cross section formed in a convex arc shape toward the inside of the cylinder are provided side by side in the axial direction. . The elastic support portion is
3. The elastic seal member according to claim 1, wherein the elastic seal member is provided at a substantially central position of the cylindrical electric wire contact portion in an axial direction of the terminal insertion hole.

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