JP2008282673A - Electric wire with terminal, connector using the electric wire with terminal, and manufacturing method of the electric wire with terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric wire with a terminal in which water cut-off treatment to prevent infitration of water into a connector through a conductor is carried out simply and surely, without receiving a constraint of the shape and size of a connector terminal. <P>SOLUTION: The electric wire with the terminal has a conductor and an insulating material that covers its outside and is provided with an electric wire in which the conductor is exposed at the terminal; a seal plug provided at the end part of the electric wire; a connector terminal, connected to the end part of the conductor of the electric wire led out from the seal plug; and a water cut-off agent to close the terminal of the insulating material. In particular, the seal plug has a cylindrical electric wire adhesion part, having an inner periphery capable of adhering closely to the outer periphery of the insulating material of the electric wire and a water cut-off agent reservoir, having a shape to cover the terminal of the insulating material from the outside in the radial direction, and the water cut-off agent is filled in the water cut-off agent reservoir so as to close the terminal of the insulating material. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric wire with terminal, a connector using the electric wire with terminal, and a method for manufacturing the electric wire with terminal. In more detail, the electric wire with a terminal which has an electric wire, a seal plug, and a connector terminal, and is filled with a water stop agent for preventing water from entering the connector through the inside of the electric wire, It is related with the manufacturing method of the connector using the electric wire with a terminal, and the said electric wire with a terminal.

  Conventionally, a waterproof connector as shown in FIG. 7 is generally known. This waterproof connector includes a seal plug 20 provided at an end of the electric wire 4, a connector terminal (not shown), and a connector housing 6. When the sealing plug 20 is brought into pressure contact with the inner surface of the insertion port 6a of the connector housing 6, the sealing plug 20 seals the connector housing 6 so that water traveling along the outer surface of the electric wire 4 enters the connector. To prevent.

  However, in the waterproof connector of FIG. 7, the water that enters the outer surface of the wire 4 can be prevented from entering the inside of the connector, but the water that enters the connector through the conductor inside the wire 4. Can not be prevented. For example, when a flaw or the like occurs in the covering material of the electric wire 4, rainwater or the like enters the electric wire 4 from the flaw, and further, water enters the connector through the conductor in the electric wire 4.

In order to solve such problems, Patent Document 1 discloses a waterproof connector terminal processing structure for preventing water from entering the connector from the inside of the electric wire 4. Among them, a connector terminal is disclosed in which a water-stopping agent in which metal powder is dispersed in a resin is applied in advance at a predetermined position of the connector terminal. The water-stopping agent is applied just at the position where the conductor is caulked and where the end portion of the covering material is disposed.
JP-A-6-349542

  However, according to the technique of Patent Document 1, depending on the shape and size of the connector terminal (particularly when the connector terminal is small), the water stop agent cannot be filled in a predetermined amount by a predetermined position. Moreover, it is necessary to contain a predetermined amount of metal powder with respect to the water-stopping agent, resulting in an increase in man-hours in the manufacture of connector terminals. Furthermore, depending on the caulking method when fixing the connector terminal to the conductor, the end portion of the covering material may not be reliably sealed with a water-stopping agent.

  The present invention has been made in view of the above-described conventional problems, and a water stop treatment for preventing water from entering the connector through the conductor is simple and reliable without being restricted by the shape and size of the connector terminal. It aims at providing the manufacturing method of the electric wire with a terminal which can be performed to, the connector using the electric wire with a terminal, and the electric wire with a terminal.

  The electric wire with a terminal of the present invention is an electric wire with a terminal inserted into an insertion port provided in a connector housing, and has an insulating material covering the conductor and the outside thereof, and the electric wire formed by exposing the conductor at the terminal. A seal plug that is provided at an end of the electric wire and can be in close contact with an inner peripheral surface of a connector housing that surrounds the insertion port, and a connector terminal connected to an end of the conductor of the electric wire led out from the seal plug And a terminal-attached electric wire comprising a water-stopping agent that plugs a terminal of the insulating material in order to prevent water that has entered inside the insulating material of the electric wire from being transmitted to the connector terminal side, and the sealing plug Has a cylindrical wire contact portion having an inner peripheral surface capable of being in close contact with the outer peripheral surface of the insulating material of the wire, and has a larger inner diameter than the wire contact portion at the connector terminal side tip, and the insulation Form that covers the end of the material from the outside in the radial direction And a waterproofing agent reservoir having, the waterproofing agent, the above object can be achieved by being filled in the waterproofing agent reservoir portion so as to close the terminal of the insulating material.

  Moreover, it is preferable that the said sealing plug is formed with an elastic material, and the protrusion which can be closely_contact | adhered to the inner peripheral surface of the said connector housing over the perimeter is formed in the outer periphery of the electric wire contact | adherence part of the said sealing plug.

  Furthermore, the connector according to the present invention is a waterproof connector using the terminal-attached electric wire, and includes a connector housing for accommodating the terminal of the terminal-attached electric wire therein. The terminal has an insertion port into which the terminal can be inserted, and the terminal of the terminal-attached electric wire is placed in the insertion port so that the outer peripheral surface of the seal plug is in close contact with the inner peripheral surface of the connector housing surrounding the insertion port. The above purpose is achieved by the insertion.

  Furthermore, the method for producing a terminal-attached electric wire of the present invention includes a conductor and an insulating material covering the outside thereof, an electric wire in which the conductor is exposed at a terminal, a seal plug provided at an end of the electric wire, In order to prevent the connector terminal connected to the end of the conductor of the electric wire led out from the sealing plug and water entering the inner side of the insulating material of the electric wire from being transmitted to the connector terminal side, the terminal of the insulating material And a water-blocking agent, and a method of manufacturing a terminal-attached electric wire inserted into an insertion port provided in the connector housing, and having a cylindrical shape having an inner peripheral surface that can be in close contact with the outer peripheral surface of the insulating material of the electric wire The wire contact portion and the connector terminal side tip communicate with a hole formed in the wire contact portion, have a larger inner diameter than the wire contact portion, and the end of the insulating material from the radially outer side A water-stopper reservoir with a covering shape A sealing plug forming step for forming a sealing plug filled in the waterproofing agent reservoir so that the waterproofing agent plugs the end of the insulating material; and the electric wire is inserted into the through hole of the sealing plug. A sealing plug mounting step, a terminal fixing step of fixing the connector terminal to the end of the electric wire, an end portion of the electric wire on the side where the sealing plug and the connector terminal are mounted facing upward, The above-described object is achieved by including a water-stopping agent supplying step of supplying a water-stopping agent in the space formed by the water-stopping agent reservoir.

  Moreover, it is preferable to include the water stop agent hardening process which hardens the said water stop agent in the said water stop agent reservoir part after the said water stop agent supply process.

  Moreover, it is preferable that the initial viscosity of the water-stopper used at the said water-stopper supply process is 0.06-6.0 Pa.s.

  According to the electric wire with a terminal of claim 1 of the present invention, the sealing plug has a tubular electric wire contact portion having an inner peripheral surface that can be in close contact with the outer peripheral surface of the insulating material of the electric wire, And a water-stop agent reservoir having a shape that covers the end of the insulating material from the outside in the radial direction, and is not restricted by the size and shape of the connector terminal. By simply putting the agent into the water-stopper reservoir, the water-stop treatment can be applied to the end portion of the insulating material easily and reliably.

  According to the electric wire with a terminal of claim 2, the sealing plug is formed of an elastic material, and a protrusion that can be in close contact with the inner peripheral surface of the connector housing is formed on the outer periphery of the electric wire contact portion of the sealing plug. Thus, the connector housing can be sealed when connected to the connector housing.

  Further, according to the connector of the third aspect, the terminal of the electric wire with terminal is inserted into the insertion port so that the outer peripheral surface of the seal plug is in close contact with the inner peripheral surface of the connector housing surrounding the insertion port. The plug tightly plugs the connector housing, and can prevent water from entering the connector housing along the outside of the electric wire.

  Further, according to the method for manufacturing a terminal-attached electric wire according to claim 4, in the water-stopping agent supplying step, the end of the wire-sealed plug and the side on which the connector terminal is mounted faces upward, and the water-stopping agent for the seal plug A waterstop agent is supplied to the space formed by the reservoir. Thereby, since the opening of the water-stopping agent reservoir portion faces upward, it becomes easy to supply the water-stopping agent.

  Moreover, according to the manufacturing method of the electric wire with a terminal of Claim 5, it prevents that a water stop agent leaks out from the inside of a water stop agent reservoir part by including the water stop agent hardening acceleration | stimulation process which hardens a water stop agent. it can.

  Moreover, according to the manufacturing method of the electric wire with a terminal of Claim 6, a water stop agent with a comparatively low viscosity can also be used as a water stop agent used at a water stop agent supply process. By using a water-stopping agent having high fluidity, the water-stopping agent can be sufficiently distributed between the conductors.

  The electric wire with a terminal of the present invention has a conductor and an insulating material covering the outside thereof, the electric wire formed by exposing the conductor at the terminal, a seal plug provided at the end of the electric wire, and a lead from the seal plug A connector terminal connected to the end portion of the conductor of the electric wire and a water-stopping agent that blocks the end of the insulating material are provided to prevent water that has entered the inside of the electric wire insulating material from being transmitted to the connector terminal side. In particular, the seal plug has a cylindrical wire contact portion having an inner peripheral surface that can be in close contact with the outer peripheral surface of the insulation material of the wire, and has a larger inner diameter at the connector terminal side tip than the wire contact portion, and is insulated. And a water stop agent reservoir having a shape that covers the end of the material from the outside in the radial direction. The water-stopping agent is filled in the water-stopping agent reservoir so as to block the end of the insulating material. That is, in the present invention, the shape of the seal plug is devised in order to easily and surely perform the water stop treatment for preventing water from entering the connector through the conductor inside the electric wire. .

  Here, in this specification, a connector includes a connector housing, a connector terminal, a seal plug, and an electric wire.

  Below, the manufacturing method of the electric wire with a terminal of this invention, the connector using this electric wire with a terminal, and the said electric wire with a terminal is demonstrated in detail using drawing.

(Embodiment 1)
FIG. 1 is a perspective view for explaining a state in which the connector-side terminal of the terminal-attached electric wire 100 according to the first embodiment is connected to the connector housing 6. As shown in FIG. 1, the connector-side terminal of the terminal-attached electric wire 100 is inserted into, for example, an insertion port 6 a of a connector housing 6 provided in an ECU (Electronic Control Unit) 7. The ECU 7 and the terminal-attached electric wire 100 are connected via the connector housing 6.

  2A and 2B are diagrams for explaining the terminal-attached electric wire 100 according to the first embodiment. FIG. 2A is a plan view of the terminal-attached electric wire 100, and FIG. 2B is a side view of the terminal-attached electric wire 100. As shown in FIG. 2, the terminal-attached electric wire 100 according to the first embodiment is derived from the electric wire 4 with the conductor 41 exposed at the terminal, the sealing plug 2 provided at the end of the electric wire 4, and the sealing plug 2. In order to prevent the connector terminal 3 connected to the end of the conductor 41 of the electric wire 4 and the water entering the inside of the insulating material of the electric wire 4 from being transmitted to the connector terminal 3 side, the terminal of the insulating material 42 is blocked. It is comprised from the liquid medicine A.

  The electric wire 4 includes a conductor 41 made of a conductive material and an insulating covering material 42 (insulating material) that covers the outside of the conductor 41. At both ends of the electric wire 4, the covering material 42 is removed so that the conductor 41 is exposed. A connector terminal 3 to be described later is crimped to a portion where the conductor 41 is exposed, thereby being electrically connected.

  FIG. 3 is a cross-sectional view for explaining the seal plug 2 provided at the connector-side end of the terminal-attached electric wire 100 according to the first embodiment. As shown in FIG. 3, the seal plug 2 is a member in which a through hole (a wire insertion hole 22a described later and a water stop agent reservoir space 21a communicating with the wire insertion hole 22a) is formed at the center. The seal plug 2 includes a wire contact portion 22 that is attached to the wire 4 in a close contact state, and a water stop agent reservoir portion 21 that is provided at one end of the wire contact portion 22 and is subjected to a water stop treatment. It is configured.

  The wire contact portion 22 is formed on the outer surface of the wire 4 inside the connector housing 6 when the terminal-attached wire 100 is connected to the barrel winding portion 22b, which is a portion around which a part of the connector terminal 3 is wound, and the connector housing 6. It is comprised from the seal | sticker part 22c for preventing that water permeates along. Two seal protrusions 22d (protrusions) are formed on the seal portion 22c. The sealing protrusion 22d is formed in a convex shape over the entire outer periphery of the sealing portion 22c. The surface of the sealing protrusion 22d is formed on the inner surface of the insertion port 6a (the inner peripheral surface of the connector housing 6) when the connector side end of the terminal-attached electric wire 100 is inserted into the insertion port 6a of the connector housing 6. The inside of the connector housing is sealed with pressure contact. Therefore, the outer diameter of the sealing protrusion 22 d of the seal plug 2 is slightly larger than the inner diameter of the connector housing 6. In addition, an electric wire insertion hole 22 a for inserting the electric wire 4 is formed at the center of the electric wire contact portion 22. The electric wire contact portion 22 has an inner diameter such that the inner peripheral surface thereof is in close contact with the outer peripheral surface of the electric wire 4 inserted through the electric wire insertion hole 22a.

  The water stop agent reservoir 21 is formed integrally with the wire contact portion 22. The water stop agent reservoir 21 is formed at the connector terminal side tip of the wire contact portion 22, has a larger inner diameter than the wire contact portion 22, and has a shape that covers the end of the covering material 42 from the radially outer side. Have. Specifically, it has a shape in which the inner diameter of the electric wire mounting portion 22 gradually increases, in other words, a shape that moves away from the outer peripheral surface of the electric wire 4 in the radial direction as the distance from the end of the electric wire mounting portion 22 increases. In other words, the water stop agent reservoir portion 21 provides a water stop agent reservoir space 21a that communicates with the wire insertion hole 22a formed in the wire contact portion 22 and that is gradually wider than the inner diameter of the wire insertion hole 22a. The water-stop agent reservoir space 21 a is opened so as to expand toward the direction away from the electric wire contact portion 22. In the present invention, since the water stop agent reservoir space 21a is formed in the seal plug 2, even if the size of the terminal is small, the filling position of the water stop agent A can be easily specified. The filling operation can be easily performed.

  The material of the sealing plug 2 is not particularly limited as long as it is a material having an appropriate elasticity that can be deformed when inserted into the insertion port 6 a of the connector housing 6.

  Since the seal plug 2 can be molded using a mold or the like, even if the water-stop agent reservoir 21 is provided, the manufacturing of the seal plug 2 is not accompanied by an increase in man-hours.

  The connector terminal 3 is provided at the tip of the terminal-attached electric wire 100. The connector terminal 3 is crimped to the seal plug 2 and the conductor 41 of the electric wire 4. The connector terminal 3 is obtained by punching a conductive metal flat plate into a predetermined shape and winding a part thereof around the outer periphery of the seal plug 2 and the outer periphery of the conductor 41 of the electric wire 4. The connector terminal 3 includes a connector connecting portion 31 that is an electrical contact portion, a conductor barrel 32 that is wound around the outer periphery of the conductor 41, and an insulation barrel 33 that is wound around the barrel winding portion 22 b of the seal plug 2. .

  Moreover, the electric wire 100 with a terminal of Embodiment 1 is the terminal part of the coating | covering material 42, Comprising: The water stop agent A is the inside of the water stop agent reservoir space 21a of the seal plug 2 formed in the connector terminal 3 side front end. Filled (see FIG. 4). This water-stopping agent A prevents the water traveling inside the electric wire 4 from entering the connector.

  The water-stopping agent A is not particularly limited as long as it has fluidity at the time of supply and has appropriate flexibility at the time of use, but is not limited to silicone resin, epoxy resin, urethane resin, acrylic resin, grease. In addition, an adhesive having viscosity and elasticity can be used. Among these, it is preferable to use a silicone resin because it is excellent in water repellency and durability.

  The initial viscosity of the water stopping agent A is preferably 0.06 to 6.0 Pa · s, and more preferably 0.6 to 3.0 Pa · s. When the initial viscosity of the water stopping agent A is less than 0.06 Pa · s, there is a tendency that the water stops flowing through the strands. Moreover, when the initial viscosity of the water-stopping agent A exceeds 6.0 Pa · s, there is a tendency that it is not filled without a gap between the strands. In particular, in the present invention, since the space for storing the water-stopping agent A is formed in the seal plug 2, the water-stopping agent A having a lower viscosity than the conventional one can be used. By using the water-stopping agent A having high fluidity, the water-stopping agent A can be sufficiently distributed inside the electric wire 4.

  FIG. 4 is a cross-sectional view for explaining a state in which the connector-side terminal of the terminal-attached electric wire 100 according to the first embodiment is connected to the connector housing 6. As shown in FIG. 4, when the connector side terminal is inserted into the insertion port 6 a formed in the connector housing 6, the protrusion 23 formed in the seal plug 2 is completely formed on the inner periphery of the insertion port 6 a. Close contact over the circumference. Thereby, the inside of the connector housing 6 is hermetically sealed, and water is prevented from entering the inside of the connector housing 6 from the outside of the electric wire. Furthermore, the water that travels inside the electric wire 4 is waterproofed by the water-stopping agent A filled in the water-stopping agent reservoir 21.

  With the above configuration, a method for manufacturing the terminal-attached electric wire 100 of the first embodiment will be described in detail below.

  The manufacturing method of the terminal-attached electric wire 100 includes a seal plug forming step for forming the seal plug 2 in which the electric wire contact portion 22 and the water-stopper reservoir portion 21 are integrally formed, and the electric wire 4 through the seal plug 2. A sealing plug mounting step for inserting through the hole, a terminal fixing step for fixing the connector terminal 3 to the terminal of the electric wire 4, and an end of the electric wire 4 on the side where the sealing plug 2 and the connector terminal 3 are mounted facing upward. A water-stopping agent supplying step for supplying the water-stopping agent A into the water-stopping agent reservoir 21 and a water-stopper curing step for hardening the water-stopping agent A in the water-stopper reservoir 21 are included.

1) Seal plug forming step In the seal plug forming step, the seal plug 2 is molded using a mold that can integrally form the wire contact portion 22 and the water-stopper reservoir 21.

2) Seal plug mounting process In the seal plug mounting process, the electric wire 4 is inserted into a through hole formed in the seal plug 2. First, the tip of the electric wire 4 is inserted from the side of the electric wire insertion hole 22a of the seal plug 2. Next, the portion of the end of the electric wire 4 where the conductor 4 is exposed is led out from the water stop agent reservoir space 21 a side of the seal plug 2. In particular, in this step, the sealing plug 2 is attached to the electric wire 4 so that the end portion of the covering material 41 is accommodated in the water stop agent reservoir space 21 a of the sealing plug 2.

3) Terminal fixing process In the terminal fixing process, the connector terminal 3 is crimped and fixed to the electric wire 4 and the seal plug 2 integrated in the seal plug mounting process. Specifically, the conductor 4 is crimped by caulking the conductor barrel 32, and the barrel winding portion 22b of the seal plug 2 is crimped by caulking the insulation barrel 33.

4) Water-stopping agent supply step Water-stopping agent A is supplied to the terminal-attached electric wire 100 completed by the steps described above. FIG. 5 is a cross-sectional view for explaining a process of applying a water-stop treatment to the connector-side terminal of the terminal-attached electric wire 100 according to the first embodiment. In this state, the agent A is being dropped. FIG. 6 shows a state where the water-stopping agent A is stored in the water-stopping agent storage space 21 a of the seal plug 2. First, as shown in FIG. 5, the end on the side where the seal plug 2 and the connector terminal 3 are mounted is directed upward. Thereby, the water-stopping agent reservoir space 21a of the seal plug 2 is opened upward, and the water-stopping agent A is easily supplied. In this state, the tip of the inlet of the dispenser D is directed to the water stop agent reservoir space 21a. The dispenser D receives a pressure from a pump (not shown) or the like, and drops a predetermined amount of the water-stopping agent A stored in the dispenser D. The water stopping agent reservoir 21 and the water stopping agent reservoir space 21a function just like a tray for the water stopping agent A dropped from the dispenser D. Therefore, it is possible to easily fill the water stop agent reservoir space 21a with an amount of the water stop agent A necessary for sealing the inside of the connector without excess or deficiency (see FIG. 6). Further, the filled water-stopping agent A moves downward due to the weight of the water-stopping agent A and reaches the inside of the electric wire 4 sufficiently. In the present invention, when the water-stopping agent A is dropped, the water-stopper reservoir space 21a of the seal plug 2 is directed upward. Therefore, it is not necessary to perform suction or the like from the other end of the electric wire 4. In this way, the water-stopping agent A is filled in the water-stopping agent reservoir 21 so as to block the end of the covering material 42.

5) Water stopping agent curing step In this water stopping agent curing step, the water stopping agent A supplied in the water stopping agent supplying step is forcibly cured. In addition, about the method of hardening a water stop agent, although it depends also on the kind of the water stop agent A, for example, the water stop agent A may be hardened by irradiating light with a predetermined illuminance for a predetermined time, or dripped. The water stopping agent A may be heated and cured, or two water stopping agents may be mixed and cured. By hardening the water-stopping agent A, it is possible to prevent the water-stopping agent A from leaking out of the water-stopping agent reservoir 21 (water-stopper reservoir space 21a). In particular, when a water-stopper A having a low initial viscosity is used, the water-stopper A is forcibly cured to prevent the water-stopper A from leaking out of the water-stopper reservoir space 21a. .

  However, in the above embodiment, in the method of manufacturing the terminal-attached electric wire 100, the case where the water-stopping agent A is forcibly cured has been described, but the present invention is not limited to this, The water-stopping agent may be naturally cured using a naturally curing type.

  As described above, according to the terminal-attached electric wire 100 of the first embodiment, by providing the water stop agent reservoir portion 21 in which the water stop agent reservoir space 21a is formed at the connector terminal side tip of the seal plug 2, the connector Without being restricted by the size or shape of the terminal, it is possible to simply and reliably apply the water-stopping treatment to the terminal portion of the insulating material by simply inserting the water-stopping agent into the water-stopping agent reservoir. In particular, even when the connector terminal 3 is small, the amount of water stop required to seal the end of the electric wire 4 when the water stop agent A is filled between the connector terminal 3 and the seal plug 2. Agent A can be easily filled without excess or deficiency. In addition, it is possible to reduce the number of manufacturing steps without requiring a pressure reducing step for allowing the water-stopping agent A to permeate. Further, the existing connector terminal 3 and connector housing 6 can be used as they are.

  By the above method, the water stop treatment was performed under the following conditions.

Water stop agent: manufactured by ThreeBond, TB-3161 (ultraviolet curable silicone resin)
Electric wire cross-sectional area ... 0.5mm ²
Terminal: TS025 waterproof Seal plug: Seal plug 2 in which a water-stopper reservoir 21 is formed integrally with the wire adhesion part 22
After the terminal fixing step, the water-stopping agent was dropped into the water-stopping agent reservoir space of the seal plug with the side where the connector terminal of the wire was mounted facing up. Thereafter, the dropped water-stopping agent was irradiated with ultraviolet rays at an illuminance of 1 W / cm ² for 10 seconds.

  After performing the water stop treatment under the above conditions, when air was supplied from the side opposite to the side where the connector terminal was mounted with the connector-side terminal immersed in the water tank, no air bubbles were generated in the water tank. It was confirmed that there was no leakage.

It is a perspective view for demonstrating a mode that the connector side terminal of the electric wire with a terminal of Embodiment 1 is connected to a connector housing. It is a figure for demonstrating the electric wire with a terminal of Embodiment 1, (a) is a top view of an electric wire with a terminal, (b) is a side view of an electric wire with a terminal. It is sectional drawing for demonstrating the sealing stopper provided in the connector side terminal of the electric wire with a terminal of Embodiment 1. FIG. It is sectional drawing for demonstrating the state by which the connector side terminal of the electric wire with a terminal of Embodiment 1 was connected to the connector housing. It is sectional drawing for demonstrating the process of giving a water stop process to the connector side terminal of the electric wire with a terminal of Embodiment 1, the tip of a connector side terminal is faced upwards, and the water stop agent is dripped with a dispenser. State. It is sectional drawing for demonstrating the process of giving a water stop process to the connector side terminal of the electric wire with a terminal of Embodiment 1, and has shown the state by which the water stop agent was stored in the water stop agent reservoir space of a seal plug. . It is a figure for demonstrating the state by which the connector side terminal of the conventional electric wire with a terminal was connected to the connector housing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Electric wire with a terminal 110 Connector 2 Seal stopper 21 Water stop agent reservoir part 21a Water stop agent reservoir space 22 Electric wire contact part 22a Electric wire insertion hole 22d Seal protrusion (protrusion)
3 Connector terminal 4 Electric wire 41 Conductor 42 Coating material (insulating material)
6 Connector housing A Water sealant

Claims (6)

An electric wire with a terminal inserted into an insertion port provided in the connector housing,
An electric wire having a conductor and an insulating material covering the outside thereof, the conductor exposed at a terminal; and
A seal plug that is provided at an end of the electric wire and can be in close contact with an inner peripheral surface of a connector housing that surrounds the insertion port;
A connector terminal connected to an end portion of the conductor of the electric wire led out from the seal plug;
In order to prevent water that has entered the inside of the insulating material of the electric wire from being transmitted to the connector terminal side, a terminal-attached electric wire comprising a water-stopping agent that plugs the terminal of the insulating material,
The sealing plug is
A cylindrical electric wire contact portion having an inner peripheral surface capable of being in close contact with the outer peripheral surface of the insulating material of the electric wire;
The connector terminal side tip has a water stop agent reservoir having a larger inner diameter than the wire contact portion and a shape that covers the end of the insulating material from the radially outer side, and the water stop agent is The terminal-attached electric wire is filled in the water-stopper reservoir so as to block the end of the insulating material. The seal plug is formed of an elastic material,
2. The terminal-attached electric wire according to claim 1, wherein a protrusion that can be in close contact with the inner peripheral surface of the connector housing is formed on the outer periphery of the electric wire contact portion of the seal plug over the entire periphery. A waterproof connector using the terminal-attached electric wire according to claim 1 or 2,
A connector housing for accommodating the terminal of the terminal-attached electric wire therein;
The connector housing has an insertion port into which the terminal of the terminal-attached electric wire can be inserted, and the terminal of the terminal electric wire has an inner peripheral surface of the connector housing in which an outer peripheral surface of the seal plug surrounds the insertion port. The connector is inserted into the insertion port so as to be in close contact with the connector. An electric wire having a conductor and an insulating material covering the outside thereof, the conductor exposed at a terminal; and
A seal plug provided at an end of the electric wire and capable of being in close contact with an inner peripheral surface of a connector housing surrounding the insertion port; and a connector terminal connected to an end of the conductor of the electric wire led out from the seal plug; In order to prevent water that has entered the inside of the insulating material of the electric wire from being transmitted to the connector terminal side, it is provided with a water-stopping agent that blocks the end of the insulating material, and is inserted into an insertion port provided in the connector housing A method for manufacturing a terminal-attached electric wire, which is formed at the wire contact portion at a cylindrical wire contact portion having an inner peripheral surface capable of being in close contact with the outer peripheral surface of the insulating material of the wire and the connector terminal side tip. A water stop agent reservoir having a shape that communicates with the hole, has a larger inner diameter than the wire contact portion, and covers a terminal of the insulating material from a radially outer side, and the water stop agent is The water-stop agent reservoir so as to block the end of the insulating material A sealing plug forming step of forming a sealing plug to be filled in portion,
A seal plug mounting step of inserting the electric wire into the through hole of the seal plug;
A terminal fixing step of fixing the connector terminal to the end of the electric wire;
A water-stop agent supply for supplying a water-stop agent to the space formed by the water-stop agent reservoir of the seal plug with the end of the wire on the side where the seal plug and the connector terminal are mounted facing upward. The manufacturing method of the electric wire with a terminal including a process.   The manufacturing method of the electric wire with a terminal of Claim 4 including the water stop agent hardening process which hardens the said water stop agent in the said water stop agent reservoir part after the said water stop agent supply process.   The method for producing a terminal-attached electric wire according to claim 4 or 5, wherein an initial viscosity of the water-stopping agent used in the water-stopper supplying step is 0.06 to 6.0 Pa · s.

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