JP2014110100A - Wire end structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly waterproof a wire end while preventing a cost required for the structure thereof from increasing and the structure from being complicated.SOLUTION: An end part 13 of a covered wire 12 mounted with a connection terminal 11 is covered with a cylindrical member 14 to prevent water from infiltrating into the covered wire 12 from the end part 13. The connection terminal 11 includes a covering material crimping part 23 and a conductor crimping part 24 for crimping a covering material covered portion and a conductor exposed portion respectively. One end part 41 of the cylindrical member 14 having flexibility is crimped and fixed together with the covered wire 12 inserted into the inside thereof with one end part 41a turned to the tip side of the end part 13. The other end part 42 of the cylindrical member 14 is folded back toward the tip side of the end part 13 so as to turn the inside out at the folded portion 43 of the cylindrical member 14 extending from one end part 41 in the extending direction of the covered wire 12. Thereby, the end part 13 to which the conductor crimping part 24 of the connection terminal 11 is crimped and fixed is housed in the inside of the cylindrical member 14.

Description

  The present invention relates to a wire terminal structure.

  Conventionally, for example, an electric wire is connected to the electric wire connecting portion of the connection terminal, a cap covering the electric wire connecting portion is attached to the electric wire, one end of the cap is brought into close contact with the electric wire, and resin is put into the cap from the opening at the other end. A method of waterproofing a wire connection part by injecting is known (for example, see Patent Document 1).

JP 60-1119086 A

  By the way, according to the waterproofing method according to the above prior art, the electric wire is only inserted into the electric wire insertion hole provided at one end of the cap, and the elastic force acting between the electric wire insertion hole of the cap and the electric wire The cap is only fixed to the electric wire by frictional force or the like. For this reason, it is difficult to stably fix the cap to the electric wire, and there is a possibility that the closeness between the end of the cap and the electric wire cannot be ensured.

  The present invention has been made in view of the above circumstances, and provides an electric wire terminal structure capable of accurately waterproofing an electric wire terminal while preventing an increase in cost required for the configuration and complication of the configuration. It is an object.

  In order to solve the above problems and achieve the object, a wire terminal structure according to a first invention of the present invention is a covered wire (for example, a connection terminal (for example, the connection terminal 11 in the embodiment)) (for example, The terminal portion of the covered electric wire 12 in the embodiment (for example, the terminal portion 13 in the embodiment) is covered with a cylindrical member (for example, the cylindrical member 14 in the embodiment) from the terminal portion. An electric wire terminal structure that prevents water from entering the covered electric wire, wherein the connection terminal is fixed by crimping the covering material covering portion of the terminal portion (for example, the covering material covering portion 13a in the embodiment). A conductor for crimping and fixing a covering material crimping portion (for example, the covering material crimping portion 23 in the embodiment) and a conductor exposed portion of the terminal portion (for example, the conductor exposed portion 13b in the embodiment) Crimp part (for example, conductor crimp part 2 in the embodiment) ), And the cylindrical member has flexibility, and one end portion (for example, one end portion 41 in the embodiment) of the cylindrical member is connected to one end portion ( For example, in a state where the one end portion 41a) in the embodiment is directed, it is crimped and fixed by the covering material crimping portion of the connection terminal together with the covered electric wire inserted therein, and the other end portion of the cylindrical member ( For example, in the other end portion 42) in the embodiment, the cylindrical member extending from the one end portion in the extending direction of the covered electric wire is a folded portion (for example, the folded portion 43 in the embodiment). The terminal portion, which is folded back toward the tip side of the terminal portion so that the inner surface is turned over to the outer surface, is accommodated inside the cylindrical member, and the conductor crimping portion of the connection terminal is fixed by crimping.

  In the electric wire terminal structure according to the second aspect of the present invention, a sealing material is provided inside the tubular member from the opening (for example, the opening 42a in the embodiment) of the other end of the tubular member. Is filled.

  In the electric wire terminal structure according to the third invention of the present invention, by covering the opening of the other end of the cylindrical member (for example, the opening 42a in the embodiment) from the outside with a sealing material, The other end is sealed from the outside.

  In the electric wire terminal structure according to the fourth aspect of the present invention, the opening at the other end is made small so as to be connectable to the connection terminal.

  In the electric wire terminal structure according to a fifth aspect of the present invention, the cylindrical member includes a small diameter portion (for example, the small diameter portion 14a in the embodiment) extending from the one end portion to the folded portion, and the folded portion from the folded portion. A large-diameter portion (for example, the large-diameter portion 14b in the embodiment) extending to the other end portion.

  In the electric wire terminal structure according to the sixth aspect of the present invention, the other end has a shape that tapers toward the other end.

  In the electric wire terminal structure according to a seventh aspect of the present invention, the connection terminal includes a connection portion (for example, the connection portion 22 in the embodiment) that can be fixed to a connection object, and the connection surface of the connection portion ( For example, the connection surface 22A) in the embodiment is positioned flush with the outer surface of the tubular member (for example, the outer surface 14A in the embodiment) or in the direction orthogonal to the extending direction of the tubular member. It arrange | positions in the position of the outer side rather than the outer surface of the said cylindrical member.

According to the wire terminal structure according to the first aspect of the present invention, the one end of the cylindrical member in the state facing the tip side of the covered electric wire is covered with the covered electric wire inserted into the cylindrical member. Crimp and fix at the material crimping part, and then fold the tubular member so that the other end of the tubular member faces the front end side of the covered electric wire, and connect the terminal part to which the conductor crimping part of the connection terminal is crimped and fixed. Since it is housed inside, the cylindrical member does not interfere with the crimping and fixing of the conductor crimping part of the connection terminal to the conductor exposed part of the covered electric wire, and the electrical connection between the connection terminal and the covered electric wire is secured. The cylindrical member can be easily attached to the terminal portion of the covered electric wire.
Also, one end of the cylindrical member is firmly and stably crimped and fixed to the covered electric wire by the covering material crimping portion of the connection terminal, and this one end can be secured to the covered electric wire. Therefore, it is possible to accurately prevent water from entering the inside of the cylindrical member.
Furthermore, the one end of the tubular member and the covered electric wire can be fixed by the covering material crimping portion provided for crimping and fixing the covered electric wire to the connection terminal. For example, the one end of the tubular member can be fixed to the covered electric wire. It is possible to prevent the cost required for the configuration from increasing and the configuration from becoming complicated without the need for providing a special member for fixing to the cover.
In addition, the crimping process by the coating material crimping part of the connection terminal can crimp and fix the coated electric wire to the connection terminal, and one end of the cylindrical member can be crimped and fixed to the coated electric cable, which complicates the work process. Can be prevented.

According to the electric wire terminal structure according to the second aspect of the present invention, the entire terminal portion of the covered electric wire accommodated in the cylindrical member can be covered with the sealing material, and the waterproof property for the terminal portion is improved. be able to.
Furthermore, since the one end portion of the cylindrical member is firmly and stably crimped and fixed to the coated electric wire by the coating material crimping portion of the connection terminal, the sealing material inside the cylindrical member is independent of the viscosity of the sealing material. Can be prevented from leaking from one end to the outside. Thereby, it can prevent that the sealing material which can be used is limited according to a viscosity etc., and can prevent that the freedom degree of selection falls.

  According to the electric wire terminal structure according to the third aspect of the present invention, the cylindrical member can be sealed simply by covering the opening of the other end portion with the sealing material from the outside, and inside the cylindrical member. A sealing material for filling is not required, and an increase in the amount of sealing material required for waterproofing can be prevented.

  According to the electric wire terminal structure according to the fourth aspect of the present invention, when the opening at the other end is covered with the sealing material from the outside, the other end of the cylindrical member can be easily sealed. In addition, the amount of sealing material required for waterproofing can be further reduced.

According to the electric wire terminal structure according to the fifth aspect of the present invention, the other end from the folded-back portion is turned upside down with respect to the small diameter portion extending from the one end portion to the folded-back portion by the covering material crimping portion of the connection terminal. By providing the large-diameter portion extending over the portion, it can be easily folded back.
Furthermore, for example, when the sealing member is filled in the cylindrical member, it can be filled easily.

According to the electric wire terminal structure according to the sixth aspect of the present invention, the other end of the cylindrical member can be easily sealed, and the exposed amount of the sealing material exposed to the outside can be reduced. The deterioration of the sealing material can be suppressed.
For example, when filling the inside of the cylindrical member with the sealing material, it is possible to prevent the amount of the sealing material required for filling from increasing, and after filling the inside of the cylindrical member with the sealing material, It is possible to suppress the sealing material from flowing out from the other end until the sealing material is cured.

  According to the wire terminal structure according to the seventh aspect of the present invention, when the connection portion of the connection terminal is fixed to the connection target, the cylindrical member interferes when the connection surface of the connection portion is brought into contact with the connection target. This can be prevented, and the connection surface of the connection portion can be brought into close contact with the connection object.

It is the top view, side view, and sectional drawing of the electric wire terminal structure which concern on embodiment of this invention. It is a block diagram which decomposes | disassembles and shows the electric wire terminal structure which concerns on embodiment of this invention. It is a figure which shows the assembly process of the electric wire terminal structure which concerns on embodiment of this invention. It is the top view, side view, and sectional drawing of the electric wire terminal structure which concern on the 1st modification of embodiment of this invention. It is a block diagram which decomposes | disassembles and shows the electric wire terminal structure which concerns on the 1st modification of embodiment of this invention. It is the top view, side view, and sectional drawing of the electric wire terminal structure which concern on the 2nd modification of embodiment of this invention.

  Hereinafter, an electric wire terminal structure according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1A to 1C, for example, the wire terminal structure 10 according to the present embodiment includes a cylindrical member 14 that covers the terminal portion 13 of the covered wire 12 to which the connection terminal 11 is attached as a sealing material. 15 is sealed.

  The connection terminal 11 is a terminal fitting made of a single metal plate (metal thin plate) made of a highly conductive metal such as copper or brass (brass), for example, as shown in FIG. The base plate portion 21, the connection portion 22 that is a plate-like piece extending from the base plate portion 21, the covering material crimping portion 23, and the conductor crimping portion 24 are configured.

  The base plate portion 21 supports, for example, the terminal portion 13 of the covered electric wire 12 placed on the surface so that the extending direction of the covered electric wire 12 coincides with the longitudinal direction.

  For example, the connecting portion 22 extends from one end in the longitudinal direction of the base plate portion 21 to be wider than the base plate portion 21 and can be fixed to a connection object (not shown) with a bolt or the like. A bolt mounting hole 22a formed through the thickness is provided.

Note that the connection surface 22A of the connection portion 22 that contacts a connection object (not shown) is positioned flush with the outer surface 14A of the tubular member 14 in the direction orthogonal to the extending direction of the tubular member 14 or a tubular shape. The member 14 is disposed at a position on the outer side than the outer surface 14A.
Accordingly, for example, the connecting portion 22 is formed with a bent portion 22b that is bent in a direction intersecting the longitudinal direction.

The covering material crimping portion 23 is, for example, a pair of protruding covering material holding piece portions 23a protruding from both ends in the width direction (that is, the short direction) of the base plate portion 21 at the other longitudinal end portion of the base plate portion 21. , 23a.
For example, the pair of covering material holding pieces 23 a and 23 a includes the base plate portion 21 together with the tubular member 14 and the covering material 32 of the terminal portion 13 of the covered electric wire 12 arranged along the longitudinal direction of the base plate portion 21. Then, the covered electric wire 12 and the tubular member 14 are pressed into the base plate portion 21 and fixed by crimping.

The conductor crimping part 24 is, for example, a pair of projecting piece-like conductor holding pieces protruding from both ends in the width direction of the base plate part 21 at a position on one end side of the covering material crimping part 23 in the longitudinal direction of the base plate part 21. 24a, 24a.
For example, the pair of conductor holding pieces 24a and 24a are formed by connecting the conductor 31 exposed from the end portion of the covering material 32 at the end portion 13 of the covered electric wire 12 arranged along the longitudinal direction of the base plate portion 21 to the base plate. The conductor 31 is bent and deformed so as to be held from both sides in the width direction of the portion 21, and the conductor 31 is pressed into the base plate portion 21 and fixed by crimping.

The covered electric wire 12 includes, for example, a conductor 31 composed of a plurality of strands and an electrically insulating covering material 32 that covers the outer peripheral surface of the conductor 31.
For example, as shown in FIG. 2, the terminal portion 13 of the covered electric wire 12 is peeled off from the covering material covering portion 13a in which the outer peripheral surface of the conductor 31 is covered with the covering material 32 and the covering material 32 over a predetermined length. Thus, a conductor exposed portion 13b exposed from the end portion of the covering material 32 so that the conductor 31 protrudes to the outside is provided.

  The cylindrical member 14 is made of, for example, flexible and soft silicone rubber, and the covered electric wire 12 can be inserted therein, and at a predetermined position between the one end 41 and the other end 42 in the longitudinal direction. The folded portion 43 can be folded so that the inner surface is turned over to the outer surface.

  Further, as shown in FIG. 2, for example, the cylindrical member 14 includes a small diameter portion 14a extending from the one end portion 41 to the folded portion 43, a large diameter portion 14b extending from the folded portion 43 to the other end portion 42, and a small diameter portion 14a. And an annular projection 14c projecting radially inward from the inner surface.

The small diameter portion 14 a has, for example, an inner surface that can be in close contact with the outer peripheral surface of the covering material 32 in the terminal portion 13 of the covered electric wire 12, and the outer surface is connected to the outer peripheral surface of the covering material 32. The covering material crimping portion 23 is fixed by crimping. Thereby, the space between the one end portion 41 of the tubular member 14 and the covering material 32 of the covered electric wire 12 is sealed.
In the state where the inner surface of the small diameter portion 14a is mounted on the outer peripheral surface of the covering material 32, the sealing performance between the small diameter portion 14a and the covering material 32 is enhanced by the annular protrusion 14c protruding from the inner surface. Yes.

  The large-diameter portion 14b has, for example, an inner diameter larger than that of the small-diameter portion 14a, the small-diameter portion 14a is mounted on the outer peripheral surface of the covering material 32 of the terminal portion 13 of the covered electric wire 12, and the cylindrical member 14 is the folded portion 43. The terminal portion 13 of the covered electric wire 12 is formed so as to be accommodated inside in a state where the inner surface is folded back to the outer surface.

Accordingly, for example, as shown in FIG. 1C, in the cylindrical member 14 attached to the terminal portion 13 of the covered electric wire 12, the one end portion 41 of the cylindrical member 14 is the tip of the terminal portion 13 of the covered electric wire 12. It is crimped and fixed by the coating material crimping portion 23 of the connection terminal 11 together with the covered electric wire 12 inserted inside with the one end portion 41a facing the side.
The other end portion 42 of the tubular member 14 is connected to the tip end of the terminal portion 13 so that the tubular member 14 extending from the one end portion 41 in the extending direction of the covered wire 12 turns the inner surface upside down at the folded portion 43. The terminal portion 13 is accommodated inside the cylindrical member 14 by being folded back toward the side.

  Note that the protrusion 14c provided on the inner surface of the small diameter portion 14a is preferably disposed at a location other than the portion that is crimped and fixed by the covering material crimp portion 23 in the extending direction of the small diameter portion 14a. It is arrange | positioned rather than the material crimping | compression-bonding part 23 at the one end part 41 side or the folding | returning part 43 side.

The sealing material 15 is a resin having fluidity at least when supplied to the cylindrical member 14 and when sealing the cylindrical member 14, and can be cured after sealing, for example, ultraviolet rays. It may be a curable resin such as a curable type, a thermosetting type, or a natural curable type.
The other end portion of the sealing material 15 is filled by, for example, filling the inside of the cylindrical member 14 from the opening 42a of the other end portion 42 of the cylindrical member 14 attached to the terminal portion 13 of the covered electric wire 12. 42 is sealed from the inside.
Thus, the sealing material 15 covers the entire end portion 13 of the covered electric wire 12 accommodated in the cylindrical member 14 in a water-stopping state.

  The wire terminal structure 10 according to the present embodiment has the above-described configuration. Next, an assembly process of the wire terminal structure 10 will be described.

First, for example, in step S01 shown in FIG. 3A, the terminal portion 13 of the covered electric wire 12 with the conductor 31 exposed so as to protrude outward from the end portion of the covering material 32 is inserted into the cylindrical member 14. Then, the inner surface of the small diameter portion 14a of the cylindrical member 14 is attached to the outer peripheral surface of the covering material 32, and the one end portion 41a of the cylindrical member 14 is directed to the distal end side of the terminal portion 13 of the covered electric wire 12.
Accordingly, the inner surface of the small diameter portion 14 a and the annular protrusion 14 c protruding from the inner surface are in close contact with the outer peripheral surface of the covering material 32.

Next, for example, in step S02 shown in FIG. 3B, the connection terminal 11 is attached to the terminal portion 13 of the covered electric wire 12 to which the tubular member 14 is attached.
Specifically, for example, the terminal portion 13 of the covered electric wire 12 is placed on the surface of the base plate portion 21 so that the extending direction of the covered electric wire 12 matches the longitudinal direction of the base plate portion 21.
Then, the outer surface of the small-diameter portion 14 a of the cylindrical member 14 is pressed into the base plate portion 21 by the covering material crimping portion 23 of the connection portion 22 so that the one end portion 41 of the cylindrical member 14 is crimped and fixed together with the covered electric wire 12.
Further, the conductor 31 exposed so as to protrude from the end portion of the covering material 32 is pressed into the base plate portion 21 by the conductor crimping portion 24 of the connection terminal 11 and fixed by crimping.

  Next, for example, in step S03 shown in FIG. 3C, the cylindrical member 14 extending from the one end portion 41 of the cylindrical member 14 in the extending direction of the covered electric wire 12 is used, and the inner surface of the folded portion 43 is the outer surface. The terminal portion 13 is accommodated in the tubular member 14 by turning the other end portion 42 of the tubular member 14 back toward the distal end side of the terminal portion 13.

  Next, in step S04 shown in FIG. 3D, for example, the fluid sealing material 15 is filled into the cylindrical member 14 from the opening 42a of the other end 42 of the cylindrical member 14, and this sealing is performed. The entire end portion 13 of the covered electric wire 12 accommodated inside the cylindrical member 14 is covered with a stopping material 15 in a water-stopping state. Then, the sealing material 15 is cured.

  As described above, according to the wire terminal structure 10 according to the present embodiment, the one end portion 41 of the cylindrical member 14 is firmly and stably crimped and fixed to the covered wire 12 by the covering material crimping portion 23 of the connection terminal 11. Adhesion between the one end portion 41 and the covered electric wire 12 can be ensured, and water can be accurately prevented from entering from the one end portion 41 into the cylindrical member 14.

  Furthermore, the one end portion 41 of the tubular member 14 and the covered electric wire 12 can be fixed by the covering material crimping portion 23 provided for crimping and fixing the coated wire 12 to the connection terminal 11, for example, the tubular member It is possible to prevent the cost required for the configuration from increasing and the configuration from becoming complicated without the need to separately provide a special member for fixing the one end portion 41 of the 14 to the covered electric wire 12.

Furthermore, the whole terminal part 13 of the covered electric wire 12 accommodated inside the cylindrical member 14 can be covered with the sealing material 15, and the waterproofness with respect to the terminal part 13 can be improved.
Furthermore, since the one end portion 41 of the cylindrical member 14 is firmly and stably crimped and fixed to the coated electric wire 12 by the coating material crimping portion 23 of the connection terminal 11, the cylindrical member is independent of the viscosity of the sealing material 15. 14 can be prevented from leaking from the one end 41 to the outside. Thereby, it can prevent that the sealing material 15 which can be used is limited according to a viscosity etc., and can prevent that the freedom degree of selection falls.

  Further, the cylindrical member 14 is connected to the small diameter portion 14 a extending from the one end 41 to the folded portion 43 by the cover material crimping portion 23 of the connection terminal 11. By providing the large-diameter portion 14b extending over, it can be easily folded back.

  Furthermore, when the connection part 22 of the connection terminal 11 is fixed to the connection object, the cylindrical member 14 is prevented from interfering when the connection surface 22A of the connection part 22 is brought into contact with the connection object, and the connection part 22 22 A of connection surfaces can be made to closely_contact | adhere to a connection target object exactly.

  In addition, according to the method for assembling the wire terminal structure 10 according to the present embodiment, the covered wire 12 can be crimped and fixed to the connecting terminal 11 by a single crimping step by the covering material crimping portion 23 of the connecting terminal 11. The one end portion 41 of the tubular member 14 can be crimped and fixed to the covered electric wire 12, and the work process can be prevented from becoming complicated.

Furthermore, the entire terminal portion 13 of the covered electric wire 12 can be waterproofed simply by supplying the sealing material 15 to the inside of the cylindrical member 14, and, for example, a pressure operation step such as pressurization or decompression is unnecessary. In addition, a device for sealing the connection terminal 11 and the covered electric wire 12 used in this pressure operation process is also unnecessary.
Further, for example, the time required for assembly does not change depending on the length of the covered electric wire 12 as in the pressure operation step, and the working efficiency can be improved.
Further, even when the conductor 31 includes a plurality of strands, it is not necessary to infiltrate the sealing material 15 between the plurality of strands, for example, a desired waterproof state regardless of the strand diameter of the conductor 31. Can be secured.

  Further, since the sealing material 15 inside the cylindrical member 14 does not leak to the outside from the one end portion 41, the sealing material 15 is only from one side of the cylindrical member 14 (that is, the opening 42 a of the other end portion 42). It is only necessary to inject into the inside of the cylindrical member 14, the work process can be simplified, the usable sealing material 15 is prevented from being limited depending on the viscosity, and the degree of freedom of selection. Can be prevented from decreasing.

In the above-described embodiment, for example, as in the first modification shown in FIGS. 4 and 5A to 5C, the cylindrical member 14 has elastically deformable stretchability and is naturally You may have a shape which tapers toward the other end part terminal in a state.
In the first modification, the tubular member 14 can increase the adhesion with the terminal portion 13 of the covered electric wire 12 accommodated therein, and can narrow the opening of the other end portion 42.

Thereby, it is possible to prevent the amount of the sealing material 15 filled in the cylindrical member 14 from increasing, and after injecting the sealing material 15 into the cylindrical member 14, the sealing material 15 It is possible to suppress the sealing material 15 from flowing out from the other end portion 42 until the material is cured.
Moreover, the exposure amount of the sealing material 15 exposed to the outside can be reduced, and deterioration of the sealing material 15 can be suppressed.

In the first modification described above, for example, as in the second modification shown in FIGS. 6A to 6C, the opening 42 a of the other end 42 of the cylindrical member 14 is made smaller to be a connection terminal. 11 base plate portions 21 may be contacted, and only the contact portion 51 between the opening 42 a and the base plate portion 21 may be sealed with the sealing material 15 from the outside of the tubular member 14.
According to the second modification, the cylindrical member 14 can be sealed simply by covering the opening 42 a of the other end 42 with the sealing material 15 from the outside, and the inside of the cylindrical member 14 is filled. Therefore, the amount of the sealing material 15 required for waterproofing can be prevented from increasing.

In the second modification, for example, the base plate portion 21 of the connection terminal 11 that can come into contact with the opening portion 42a of the other end portion 42 is provided with an extended portion that extends in the width direction or the like, thereby opening the opening portion 42a. The area in contact with the connection terminal 11 may be increased, or the opening 42 a of the other end 42 may be made small so as to be in close contact with the base plate 21 of the connection terminal 11.
Thereby, the adhesiveness of the base board part 21 and the opening part 42a can be improved, and the waterproofness of the other end part 42 of the cylindrical member 14 can be improved.

  DESCRIPTION OF SYMBOLS 10 ... Electric wire terminal structure, 11 ... Connection terminal, 12 ... Covered electric wire, 13 ... Terminal part, 14 ... Cylindrical member, 14A ... Outer surface, 14a ... Small diameter part, 14b ... Large diameter part, 15 ... Sealing material, 22 ... Connection part, 22A ... connection surface, 23 ... covering material pressure bonding part (crimping part), 24 ... conductor pressure bonding part, 31 ... conductor, 32 ... covering material, 41 ... one end part, 42 ... other end part, 42a ... opening part, 43 ... turn-up part

Claims (7)

A wire terminal structure that prevents water from entering the covered electric wire from the terminal portion by covering the terminal portion of the covered electric wire with the connecting terminal attached thereto with a cylindrical member,
The connection terminal includes a coating material crimping portion for crimping and fixing the coating material covering portion of the terminal portion, and a conductor crimping portion for crimping and fixing the conductor exposed portion of the terminal portion,
The cylindrical member has flexibility,
One end portion of the cylindrical member is crimped and fixed by the covering material crimping portion of the connection terminal together with the covered electric wire inserted therein, with the one end portion facing the distal end side of the terminal portion,
The other end portion of the tubular member is folded back toward the distal end side of the terminal portion so that the tubular member extending in the extending direction of the covered electric wire from the one end portion turns the inner surface upside down at the folded portion. And
The wire terminal structure, wherein the terminal portion, in which the conductor crimping portion of the connection terminal is fixed by crimping, is accommodated inside the cylindrical member.   The wire terminal structure according to claim 1, wherein the cylindrical member is filled with a sealing material from an opening at the other end of the cylindrical member.   The wire terminal structure according to claim 1, wherein the other end portion is sealed from the outside side by covering the opening of the other end portion of the cylindrical member with a sealing material from the outside side. .   The wire terminal structure according to claim 3, wherein the opening of the other end is made small so as to be connectable to the connection terminal.   The said cylindrical member is equipped with the small diameter part which extends from the said one end part to the said folding | returning part, and the large diameter part which extends from the said folding | returning part to the said other end part, Any one of Claim 1 to 4 characterized by the above-mentioned. The electric wire terminal structure as described in any one.   The wire terminal structure according to any one of claims 1 to 5, wherein the other end has a shape that tapers toward the other end. The connection terminal includes a connection portion that can be fixed to a connection object,
The connection surface of the connection portion is disposed at a position flush with the outer surface of the cylindrical member or at a position on the outer side of the outer surface of the cylindrical member in a direction orthogonal to the extending direction of the cylindrical member. The wire terminal structure according to any one of claims 1 to 6, wherein the wire terminal structure is provided.

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