JP2004241246A - Terminal metal and connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the direction of a terminal metal against an electric wire when the terminal metal is connected to the electric wire. <P>SOLUTION: In an electric wire connection part 32 of the terminal metal 30, the electric wire 50 is housed from the back and the electric wire 50 is hooked on the lance form 35 of the electric wire connection part 32. Because the electric wire connection part 32 is cylindrical, it is not necessary to position the terminal metal 30 against the electric wire 50 in the peripheral direction when connecting with the electric wire 50. Therefore, a mechanism to set the terminal metal 30 at a prescribed posture is unnecessary, and simplification of a device is realized. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a terminal fitting connected to an electric wire and a connector accommodating the terminal fitting.
[0002]
[Prior art]
Conventionally, as a means for fixing the terminal fitting to the end of the wire, a method of forming an open barrel-shaped wire crimping part on the terminal fitting and crimping the wire crimping part to the wire, or forming a pressure contact blade on the terminal fitting, There is a method of pressing an electric wire to a press-contact blade. As a fixing method by crimping, there is a method disclosed in Patent Document 1 and the like, and as a fixing method by pressure contact, there is a method disclosed in Patent Document 2 and the like.
[0003]
[Patent Document 1]
JP-A-08-050947
[0004]
[Patent Document 2]
JP-A-11-260463
[0005]
[Problems to be solved by the invention]
In the connection method by crimping or press contact as described above, the shape of the connection portion (the wire crimp portion or the press contact blade) in the terminal fitting has a direction in the circumferential direction. In other words, in the case of crimping, the direction in which the wire is assembled to the wire crimping part is determined, in the case of crimping, the direction in which the wire is pressed against the press-contact blade is determined, and when the wire is fixed to the terminal fitting, the terminal fitting is Must be correctly oriented with respect to the electric wire.
[0006]
For this reason, when the electric wires are fixed using an automatic machine, a mechanism for setting the terminal fittings in a predetermined direction is required, and there is a problem that the structure of the automatic machine becomes complicated.
The present invention has been made in view of the above circumstances, and has as its object to eliminate the directionality of the terminal fitting with respect to the electric wire when connecting the terminal fitting to the electric wire.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is a terminal fitting having a terminal connection portion connected to a mating terminal on a front end side and a wire connection portion connected to a terminal portion of the wire on a rear end side, wherein the wire connection is provided. The portion has a cylindrical shape capable of receiving the electric wire from the rear, and the electric wire connecting portion is provided with a retaining means capable of locking the electric wire to prevent the electric wire from coming off. .
[0008]
According to a second aspect of the present invention, in the first aspect, the electric wire connecting portion coaxially connects a core wire accommodating portion accommodating a core wire of the electric wire and a coating accommodating portion accommodating an insulating coating of the electric wire. A configuration in which the retaining means is caulked to the core wire while reducing the diameter of the core wire accommodating portion, thereby preventing the core wire from being removed and connecting the wire connection portion and the core wire in a conductive manner. It has been.
According to a third aspect of the present invention, in the first or second aspect of the present invention, the electric wire connecting portion coaxially includes a core wire accommodating portion accommodating a core wire of the electric wire and a sheath accommodating portion accommodating an insulating coating of the electric wire. The retaining means cuts and raises a part of the coating accommodating portion inward and cuts the tip of the cut and raised piece into the insulating coating.
[0009]
According to a fourth aspect of the present invention, in any one of the first to third aspects, the terminal connection portion is formed in a circular shape concentric with the electric wire connection portion.
According to a fifth aspect of the present invention, in the invention of the fourth aspect, the outer diameter of the terminal connecting portion is substantially the same as or smaller than the outer diameter of the electric wire connecting portion. However, it is configured such that the dimensions are substantially the same as or smaller than the outer diameter of the insulating coating of the electric wire.
[0010]
The invention according to claim 6 is such that a terminal fitting having a terminal connection portion connected to a mating terminal on a front end side and a wire connection portion connected to a terminal portion of an electric wire on a rear end side is housed in a housing. A connector, wherein the electric wire connection portion has a cylindrical shape capable of receiving the electric wire from the rear, and the electric wire connection portion has a retaining means capable of restraining the electric wire from being pulled out by engaging with the electric wire. Is provided.
According to a seventh aspect of the present invention, in the invention of the sixth aspect, the electric wire connecting portion coaxially connects a core wire accommodating portion accommodating the core wire of the electric wire and a coating accommodating portion accommodating the insulating coating of the electric wire. The retaining means is configured to cut and raise a part of the coating accommodating portion inward and cut the tip of the cut and raised piece into the insulating coating, and is formed by cutting and raising the cut and raised piece. The terminal fitting is prevented from being pulled out by locking a locking portion formed in the housing into the locking hole.
[0011]
According to an eighth aspect of the present invention, in the sixth or seventh aspect, the terminal connection portion is formed in a circular shape concentric with the electric wire connection portion.
According to a ninth aspect of the present invention, in the invention of the eighth aspect, the outer diameter of the terminal connection portion is substantially the same as or smaller than the outer diameter of the electric wire connection portion. However, it is configured such that the dimensions are substantially the same as or smaller than the outer diameter of the insulating coating of the electric wire.
[0012]
A tenth aspect of the present invention provides a terminal fitting having a terminal connection portion on a front end side and a wire connection portion on a rear end side, a first housing accommodating the terminal fitting, and a second housing accommodating the terminal fitting. 2 is a connector comprising a housing and a relay terminal housed in the first housing, wherein the terminal connection portion has a round pin shape, the wire connection portion has a cylindrical shape, and the wire connection portion has In a state where the electric wire is housed and fixed, the relay terminal has a cylindrical shape with both ends open, and in a state where the electric wire is housed in the first housing, a terminal connecting portion of the terminal fitting is provided in one opening of the relay terminal. In a state where the first housing and the second housing are fitted together, the terminal connection portion of the terminal fitting housed in the second housing is connected to the other terminal of the relay terminal. Open By being inserted from, has a configuration in which the first housing side terminal fitting and the terminal fitting of the second housing side is connected via the relay terminal.
[0013]
Function and effect of the present invention
[Inventions of Claims 1 and 6]
When connecting to an electric wire, the electric wire is inserted into the electric wire connection portion, and the retaining means is locked to the electric wire. Since the electric wire connection portion has a cylindrical shape, it is not necessary to position the terminal fitting in the circumferential direction with respect to the electric wire when connecting to the electric wire. Therefore, the device for connecting to the electric wire does not require a mechanism for setting the terminal fitting in a predetermined posture, and the device can be simplified.
[0014]
[Invention of claim 2]
Since the retaining means not only prevents the core wire from coming off but also serves as a means for electrically connecting the core wire and the electric wire connecting portion, the terminal fittings are compared with those in which the conducting means and the retaining means are separately provided. Can be simplified. Further, as a means for fixing the core wire and the electric wire connection portion, a method by welding can be considered, but in the present invention, since the fixing is performed by caulking, the cost can be reduced as compared with welding.
[0015]
[Invention of claim 3]
As a means for preventing the insulation coating from coming off, the tip of the cut-and-raised piece obtained by cutting and raising a part of the coating accommodating portion is cut into the insulation coating, so that the insulation coating can be reliably prevented from coming off.
[Inventions of Claims 4 and 8]
Since the terminal connection portion is formed in a circular shape concentric with the electric wire connection portion, it is not necessary to consider the orientation of the terminal fitting in the circumferential direction when the terminal fitting is housed in the connector housing and connected to the counterpart terminal. .
[0016]
[Inventions of Claims 5 and 9]
If the terminal connection portion and the wire connection portion are non-circular, there is a concern that the size will be larger than the outer diameter of the wire, but in the present invention, both the terminal connection portion and the wire connection portion are The dimensions are substantially the same as or smaller than the outer diameter of the insulating coating of the electric wire. This makes it possible to reduce the pitch when a plurality of terminal fittings are arranged in parallel.
[Invention of Claim 7]
As a means for preventing the insulation coating from coming off, the tip of the cut-and-raised piece obtained by cutting and raising a part of the coating accommodating portion is cut into the insulation coating, so that the insulation coating can be reliably prevented from coming off. In addition, since the terminal fitting is prevented from being pulled out of the housing by using the locking hole formed by cutting and raising the cut and raised piece, the shape inside the housing can be simplified.
[0017]
[Invention of claim 10]
When connecting to an electric wire, the electric wire is inserted into the electric wire connection portion, and the retaining means is locked to the electric wire. Since the electric wire connection portion has a cylindrical shape, it is not necessary to position the terminal fitting in the circumferential direction with respect to the electric wire when connecting to the electric wire. Therefore, the device for connecting to the electric wire does not require a mechanism for setting the terminal fitting in a predetermined posture, and the device can be simplified.
Further, since the cylindrical relay terminal having both ends opened is used, the terminal fitting housed in the first housing and the terminal fitting housed in the second housing can be used as common parts.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
[Embodiment 1]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
The connector A according to the first embodiment includes a first housing 10 housing the terminal fitting 30 and the relay terminal 40, and a second housing 20 housing the terminal fitting 30. The two housings 10 and 20 are fitted together. The two terminal fittings 30 are connected to each other via a relay terminal 40 so as to be conductive.
[0019]
The first housing 10 has a plurality of cavities 11 penetrating between its front and rear end faces. When viewed from the front, the plurality of cavities 11 are arranged vertically and horizontally at a constant pitch. The cavity 11 is formed of a substantially circular through-hole, and its inner diameter is substantially constant over its entire length. A plurality of front stop portions 12 are formed on the inner periphery of the cavity 11 and project inward from a substantially central position in the front-rear direction. The front stop portions 12 are located rearward (rightward in FIG. 3) of the front stop portions 12. A protruding locking portion 13 is formed. The locking portions 13 are disposed at two positions above and below at intervals of 180 ° in the circumferential direction. Note that a lock arm 14 is formed on the upper surface of the first housing 10.
[0020]
The second housing 20 has a plurality of cavities 21 penetrating between the front and rear end surfaces thereof and corresponding to the cavities 11 of the first housing 10. The cavity 21 is formed of a substantially circular through-hole, and its inner diameter is substantially constant over its entire length. A plurality of front stop portions 22 projecting inward are formed on the inner periphery of the front end portion of the cavity 21, and a projecting locking portion 23 is provided at a position rearward (leftward in FIG. 2) of the front stop portion 22. Is formed. The locking portions 23 are arranged at two positions above and below at intervals of 180 ° in the circumferential direction. In addition, the second housing 20 is formed with a rectangular tubular hood portion 24 extending forward from the peripheral edge of the front end surface, and a lock portion 25 is formed at the front end of the upper wall of the hood portion 24. .
[0021]
The terminal fitting 30 is obtained by subjecting a metal plate to bending or the like, and has a shape that is elongated in the front-rear direction as a whole. The terminal fitting 30 is connected to a terminal portion of an electric wire 50 in which the outer periphery of a circular core wire 51 is surrounded by a cylindrical insulating coating 52. A substantially front half portion of the terminal fitting 30 is a terminal connection portion 31 having a round pin shape, that is, a circular elongated shape, and a substantially rear half portion is provided with a cylindrical wire connection portion 32 concentric with the terminal connection portion 31. Has become. The outer diameter of the electric wire connection part 32 is larger than the outer diameter of the terminal connection part 31, and the electric wire 50 is inserted into the hollow of the electric wire connection part 32 from behind.
[0022]
A substantially front half of the wire connection portion 32 is a core wire accommodating portion 33, and a substantially rear half portion is a sheath housing portion 34 having a slightly larger diameter than the core wire accommodating portion 33. The outer diameter of the sheath accommodating portion 34 is set to be substantially the same as the outer diameter of the insulating sheath 52 of the electric wire 50, and the inner diameter of the sheath accommodating portion 34 is smaller than the maximum outer diameter of the electric wire 50, that is, smaller than the outer diameter of the insulating sheath 52. It has been. The inner diameter of the core wire accommodating portion 33 is approximately the same as or slightly larger than the outer diameter of the core wire 51. Note that the outer diameter of the terminal connection portion 31 is slightly smaller than the inner diameter of the core wire accommodating portion 33.
[0023]
In addition, a pair of upper and lower cut-and-raised pieces 35 (removal preventing means, which is a constituent element of the present invention) are formed in the cover accommodating portion 34 by being cut and raised inward. These two cut-and-raised pieces 35 are arranged at an interval of 180 ° in the circumferential direction, that is, the arrangement corresponds to the locking portion 13 of the first housing 10 and the locking portion 13 of the second housing 20. The cut-and-raised piece 35 extends in a cantilever shape obliquely toward the front, that is, toward the insertion direction of the electric wire 50 with respect to the sheath accommodating portion 34. Further, a portion opened by cutting and raising the cut and raised piece 35 is a locking hole 36.
[0024]
The relay terminal 40 is formed by bending a flat metal plate, and has a cylindrical shape as a whole. In the abutting portion between the side edges of the metal plate, an expandable slit 41 is formed. It extends linearly in the front-rear direction. The thickness of the metal plate constituting the relay terminal 40 is substantially the same as the thickness of the metal plate constituting the terminal fitting 30. The outer diameter of the relay terminal 40 is substantially the same as or slightly smaller than the wire connection portion 32 of the terminal fitting 30, and the inner diameter of the relay terminal 40 is the same as that of the terminal connection portion 31 of the terminal fitting 30. The dimensions are approximately the same as or slightly larger than the outer diameter.
[0025]
At a substantially central position in the length direction of the relay terminal 40, a pair of upper and lower retaining pieces 42 extending obliquely and forward in a cantilever manner are formed by cutting and raising. Further, elongated contact portions 43 are formed at positions forward and rearward of the retaining piece 42 of the relay terminal 40 along the circumferential direction and continuous over the entire circumference, respectively. The contact portion 43 is reduced in diameter in a rib shape inward, and has a groove shape on the outer periphery. The inner diameter of the contact portion 43 is slightly smaller than the outer diameter of the terminal connection portion 31 of the terminal fitting 30.
[0026]
Next, assembling of the connector A will be described.
When connecting the terminal fitting 30 to the end of the electric wire 50, first, the insulating coating 52 is removed at the end of the electric wire 50, and the end of the core wire 51 has a length corresponding to the core wire accommodating portion 33 of the terminal fitting 30. Only exposed. When this electric wire 50 is inserted into the electric wire connection portion 32 from the rear and hits the back end (front end), the exposed portion of the core wire 51 is accommodated in the core wire accommodation portion 33 and the terminal portion of the insulating coating 52 is covered and accommodated. It is housed in the section 34. In this state, the leading end of the cut-and-raised piece 35 of the sheath accommodating portion 34 bites into the insulating sheath 52, so that the electric wire 50 is held in the terminal fitting 30 (the electric wire connection portion 32) so as not to come off. Further, since the insulating coating 52 is elastically sandwiched between the pair of upper and lower cut-and-raised pieces 35, the elastic clamping force also controls the wire 50 to come off.
[0027]
Next, the core wire accommodating portion 33 is caulked to the core wire 51 while reducing its diameter in the circumferential direction. The reduced diameter portion 37 is formed at two places in the front and back, and bites into the outer circumference of the core wire 51 continuously over the entire circumference. By the biting action of the reduced diameter portion 37, the core wire 51 is prevented from being pulled out from the electric wire connection portion 32, and the electric wire connection portion 32 and the core wire 51 are connected to be conductive. As described above, the terminal fitting 30 is fixed concentrically to the terminal of the electric wire 50.
[0028]
On the other hand, in the first housing 10, the relay terminals 40 are inserted into the respective cavities 11 from the front and hit against the front stop portions 12. The relay terminal 40 accommodated in the cavity 11 in this manner is retained in a retaining state by cutting the tip (front end) of the retaining piece 42 into the inner wall of the cavity 11.
Similarly, in the first housing 10, the terminal fittings 30 are inserted into the respective cavities 11 from the rear and hit against the front stop portions 12. The terminal fitting 30 accommodated in this way is retained in a retaining state by engaging the engaging portion 13 of the cavity 11 with the engaging hole 36 formed in the covering accommodation portion 34. In this state, the terminal connection portion 31 is fitted into the relay terminal 40 from behind, and the contact portion 43 comes into contact with the outer periphery of the terminal connection portion 31. At this time, since the relay terminal 40 is elastically deformed so as to slightly expand in diameter, the contact portion 43 tightens the terminal connection portion 31 with a predetermined contact pressure by the elastic restoring force of the relay terminal 40. Thereby, the terminal fitting 30 and the relay terminal 40 are electrically connected.
[0029]
Also in the second housing 20, the terminal fittings 30 are inserted into the respective cavities 21 from the rear and hit against the front stop portions 22. The terminal fitting 30 accommodated in this manner is retained in a retaining state by engaging the engaging portion 23 of the cavity 21 with the engaging hole 36 formed in the covering accommodating portion 34. Further, the terminal connection portion 31 is in a state of protruding into the hood portion 24.
The first housing 10 that houses the terminal fittings 30 and the relay terminals 40 as described above is fitted to the hood 24 of the second housing 20 that houses the terminal fittings 30, and the engagement between the lock arm 14 and the lock part 25 is established. As a result, both housings 10, 20 are locked in the fitted state. In this fitting state, the terminal connection part 31 of the terminal fitting 30 protruding from the hood part 24 of the second housing 20 is fitted into the relay terminal 40 from the front, and comes into contact with the outer periphery of the terminal connection part 31. The part 43 contacts. At this time, since the substantially first half of the relay terminal 40 is elastically deformed so as to slightly expand in diameter, the contact portion 43 tightens the terminal connection portion 31 with a predetermined contact pressure by the elastic restoring force of the relay terminal 40. As a result, the terminal fitting 30 of the second housing 20 and the relay terminal 40 are electrically connected to each other, and the terminal fitting 30 of the first housing 10 and the terminal fitting 30 of the second housing 20 are connected via the relay terminal 40. It is connected in a conductive manner.
[0030]
As described above, in the present embodiment, when connecting the terminal fitting 30 and the electric wire 50, the electric wire 50 is inserted into the electric wire connection portion 32, and the cut-and-raised piece 35 as a retaining means is attached to the electric wire 50. However, since the electric wire connection portion 32 has a cylindrical shape, there is no need to position the terminal fitting 30 in the circumferential direction with respect to the electric wire 50. Therefore, the device for connecting to the electric wire 50 does not require a mechanism for setting the terminal fitting 30 in a predetermined posture, thereby making it possible to simplify the device.
[0031]
In addition, the cut-and-raised piece 35 is caulked to the core wire 51 by reducing the diameter of the core wire accommodating portion 33 by reducing the diameter of the core wire accommodating portion 33. However, since the reduced diameter portion 37 not only prevents the core wire 51 from coming off, but also serves as a means for connecting the core wire 51 and the electric wire connection portion 32 in a conductive manner, The simplification of the terminal fitting 30 is possible as compared with the case where the conducting means and the retaining means are separately provided.
[0032]
Further, as a means for fixing the core wire 51 and the electric wire connection portion 32, a method by welding can be considered, but in the present embodiment, the core wire 51 is fixed by caulking, so that the cost can be reduced as compared with welding. ing.
Further, as a means for preventing the insulating coating 52 from being pulled out of the wire connecting portion 32, the tip of the cut-and-raised piece 35 obtained by cutting and raising a part of the coating accommodating portion 34 is made to bite into the insulating coating 52. The insulating coating 52 can be reliably prevented from coming off.
[0033]
Moreover, since the terminal fitting 30 is prevented from being pulled out of the housings 10 and 20 by using the locking holes 36 formed by cutting and raising the cut and raised pieces 35, the inside of the housings 10 and 20 (cavities 11 and 21). Can be simplified.
In addition, since the terminal connection portion 31 is formed in a circular shape concentric with the electric wire connection portion 32, when the terminal fitting 30 is accommodated in the housings 10 and 20 of the connector A and connected to the relay terminal 40 (the partner terminal). In addition, it is not necessary to consider the direction of the terminal fitting 30 in the circumferential direction.
[0034]
Also, unlike the present embodiment, when the terminal connection portion and the electric wire connection portion are non-circular, the size may be larger than the outer diameter of the electric wire 50. Since both the terminal connection portion 31 and the electric wire connection portion 32 have dimensions substantially the same as or smaller than the outer diameter of the insulating coating 52 of the electric wire 50, the pitch of the plurality of parallel terminal fittings 30 is reduced. It is possible to do.
In addition, as the means for connecting the terminal fitting 30 of the first housing 10 and the terminal fitting 30 of the second housing 20, the cylindrical relay terminal 40 having both open ends is used, so that the terminal accommodated in the first housing 10 is used. It has been realized that the metal fitting 30 and the terminal metal fitting 30 housed in the second housing 20 are common components.
[0035]
[Embodiment 2]
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the connector B of the second embodiment, the configuration of the first housing 60 and the first terminal fitting 70 housed therein are different from those of the first embodiment. Other configurations are the same as those in the first embodiment, and thus the same configurations are denoted by the same reference numerals, and description of the structures, operations, and effects will be omitted.
In the first embodiment, the relay terminal 40 is accommodated in the first housing 10, whereas in the second embodiment, the first terminal fitting 70 accommodated in the first housing 10 without using the relay terminal 40 is provided. The second terminal fitting 30 housed in the second housing 20 is directly fitted and connected. Note that the second housing 20 has the same configuration as that of the first embodiment, and the second terminal fitting 30 has the same configuration as the terminal fitting 30 of the first embodiment.
[0036]
The first housing 60 has a plurality of cavities 61 penetrating between its front and rear end faces. When viewed from the front, the plurality of cavities 61 are arranged vertically and horizontally at a constant pitch. The cavity 61 is formed of a substantially circular through-hole, and its inner diameter is substantially constant over its entire length. At the rear end of the cavity 61, a projection-shaped engaging portion 62 for preventing the first terminal fitting 70 from being removed is formed. The locking portions 62 are arranged at two positions above and below at intervals of 180 ° in the circumferential direction.
[0037]
The first terminal fitting 70 is obtained by subjecting a metal plate to bending or the like, and has an elongated shape in the front-rear direction as a whole. A substantially front half portion of the first terminal fitting 70 is a terminal connection portion 71 having a cylindrical shape, and a substantially rear half portion has a cylindrical shape slightly larger in diameter than the terminal connection portion 71 and is connected to the terminal connection portion 71. On the other hand, it is an electric wire connection portion 72 which is concentrically continuous.
A substantially front half of the wire connection portion 72 is a core wire accommodation portion 73, and a substantially rear half portion is a sheath accommodation portion 74 having a slightly larger diameter than the core wire accommodation portion 73. The outer diameter of the sheath accommodating portion 74 is set to be substantially the same as the outer diameter of the insulating coating 52 of the electric wire 50, and the inner diameter of the core wire accommodating portion 73 is approximately the same as or slightly larger than the outer diameter of the core wire 51. Is set to
[0038]
A pair of upper and lower cut-and-raised pieces 75 (removal preventing means, which is a constituent element of the present invention) are formed in the cover accommodating portion 74 by being cut and raised inward. The two cut-and-raised pieces 75 are arranged at an interval of 180 ° in the circumferential direction, that is, arranged so as to correspond to the locking portions 62 of the first housing 60. The cut-and-raised piece 75 has a form extending in a cantilever manner obliquely toward the front, that is, toward the insertion direction of the electric wire 50 with respect to the electric wire connection portion 72.
[0039]
At a substantially central position in the length direction of the terminal connection portion 71, an elongated contact portion 76 extending in the circumferential direction and continuous over the entire circumference is formed. The contact portion 76 is reduced in diameter into a rib shape inward, and has a groove shape on the outer periphery. The inner diameter of the contact portion 76 is slightly smaller than the outer diameter of the terminal connection portion 71 of the second terminal fitting 30.
Next, assembling of the connector B will be described.
When connecting the first terminal fitting 70 to the terminal portion of the electric wire 50, the electric wire 50 is inserted into the electric wire connection portion 72 from the rear by a predetermined length, and the exposed portion of the core wire 51 is accommodated in the core wire accommodation portion 73. The terminal portion of the insulating coating 52 is housed in the coating housing portion 74. In this state, the distal end of the cut-and-raised piece 75 of the sheath accommodating portion 74 bites into the insulating coating 52, so that the electric wire 50 is held in a state of being prevented from being pulled out from the first terminal fitting 70. Further, since the insulating coating 52 is elastically sandwiched between the pair of upper and lower cut-and-raised pieces 75, the detachment of the electric wire 50 is also controlled by the elastic clamping force.
[0040]
Next, the core wire accommodating portion 73 is caulked to the core wire 51 while being reduced in diameter in the circumferential direction. The reduced diameter portions 77 are formed at two places in the front and rear, and bite into the outer circumference of the core wire 51 continuously over the entire circumference. By the biting action of the reduced diameter portion 77, the core wire 51 is prevented from being pulled out from the electric wire connection portion 72, and the electric wire connection portion 72 and the core wire 51 are connected to be conductive. Thus, the first terminal fitting 70 is concentrically fixed to the end of the electric wire 50.
[0041]
Next, the first terminal fittings 70 are inserted into the respective cavities 61 of the first housing 60 from behind, and the cavities are formed in the locking holes 78 formed along with the cut-and-raised pieces 75 in the cover accommodating portion 74. The first terminal fitting 70 is retained in the first housing 60 in a retaining state by locking the locking portion 62 of the first terminal 60.
The first housing 60 that houses the first terminal fitting 70 in this manner is fitted to the hood 24 of the second housing 20 that houses the second terminal fitting 30, and the lock arm 79 and the lock part 25 are connected to each other. The engagement locks the housings 20, 60 in the fitted state. In this fitting state, the terminal connection part 71 of the second terminal fitting 30 is fitted into the terminal connection part 71 of the first terminal fitting 70 from the front, and As a result, the contact portion 76 of the first terminal fitting 70 comes into contact. As a result, the first terminal fitting 70 and the second terminal fitting 30 are electrically connected by male and female fitting.
[0042]
Since the relay terminal is not required in the second embodiment, the number of components and the number of assembling steps on the first housing 60 side are reduced as compared with the first embodiment.
[Other embodiments]
The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. Can be implemented with various modifications.
[0043]
(1) In the above embodiment, the terminal connection portion is circular, but according to the present invention, the terminal connection portion may be non-circular (for example, rectangular tube or flat tab).
(2) In the above embodiment, the core wire and the wire connection portion are fixed by caulking, but according to the present invention, the core wire and the wire connection portion may be fixed by welding.
(3) In the above embodiment, the wire is prevented from being pulled out by making the tip of the cut-and-raised piece bite into the insulating coating. According to the present invention, the diameter of the coating receiving portion is reduced in the male and female directions while the insulating coating is formed. It may be retained by caulking.
[0044]
(4) In the above embodiment, the terminal connection portion is formed in a circular shape concentric with the wire connection portion. However, according to the present invention, the terminal connection portion may be a circular shape eccentric to the wire connection portion.
(5) In the above embodiment, the outer diameter of the electric wire connection portion is set to be approximately the same as the outer diameter of the insulating coating of the electric wire. However, according to the present invention, the outer diameter of the electric wire connection portion is smaller than the outer diameter of the insulating coating. The dimensions may be used.
(6) In the above embodiment, the locking holes for retaining the terminal fittings are formed in the cut-and-raised portions of the cut-and-raised pieces. However, according to the present invention, the locking holes are formed in portions different from the cut and raised portions. It may be formed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first housing and a second housing in a detached state according to the first embodiment.
FIG. 2 is a sectional view of a second housing.
FIG. 3 is a sectional view of a first housing.
FIG. 4 is a sectional view showing a state where the first housing and the second housing are fitted to each other;
FIG. 5A is a perspective view of a state before connecting an electric wire to a terminal fitting.
(B) Perspective view of the state where the electric wire is connected to the terminal fitting.
FIG. 6A is a cross-sectional view of a state before an electric wire is connected to a terminal fitting.
(B) Cross-sectional view of the state where the electric wire is connected to the terminal fitting
FIG. 7 is a perspective view of a relay terminal.
FIG. 8 is a sectional view showing a state where a first housing and a second housing are detached in the second embodiment.
FIG. 9 is a sectional view showing a state where both housings are fitted to each other.
[Explanation of symbols]
A: Connector
10 First housing
13: Locking part
20 ... second housing
23 ... locking part
30 ... terminal fittings
31 Terminal connection part
32 ... wire connection
33 ... core wire housing
34 ... Coating storage section
35 ... cut and raised piece (means for retaining)
36 ... locking hole
40 ... relay terminal
50 ... Electric wire
51 ... core wire
52 ... insulation coating
B: Connector
60 first housing
62 ... locking part
70 ... 1st terminal fitting
71 ... terminal connection part
72 ... wire connection
73 ... core wire housing
74 ... Coating storage section
75 ... cut-and-raised pieces (means for retaining)
78 ... locking hole

Claims (10)

A terminal fitting having a terminal connection portion connected to a mating terminal on a front end side, and a wire connection portion connected to a terminal portion of the wire on a rear end side,
The wire connection portion has a cylindrical shape capable of housing the wire from behind,
A terminal fitting, wherein the wire connection portion is provided with a retaining means which can restrict the wire from coming off by being locked to the wire. The wire connection portion is configured such that a core wire housing portion that houses the core wire of the wire and a coating housing portion that houses the insulating coating of the wire are coaxially connected,
The retaining means is configured to caulk the core wire while reducing the diameter of the core wire accommodating portion, thereby stopping the core wire and connecting the wire connection portion and the core wire in a conductive manner. The terminal fitting according to claim 1, wherein: The wire connection portion is configured such that a core wire housing portion that houses the core wire of the wire and a coating housing portion that houses the insulating coating of the wire are coaxially connected,
The said retaining means cuts and raises a part of the said coating | coated accommodation part inward, It is set as the structure which bites the front-end | tip of the cut-and-raised piece into the said insulating coating, The Claim 1 or Claim 2 characterized by the above-mentioned. Terminal fittings. The terminal fitting according to any one of claims 1 to 3, wherein the terminal connection part is formed in a circular shape concentric with the electric wire connection part. The outer diameter of the terminal connection portion is approximately the same as or smaller than the outer diameter of the electric wire connection portion,
The terminal fitting according to claim 4, wherein an outer diameter of the electric wire connection portion is approximately the same as or smaller than an outer diameter of an insulating coating of the electric wire. A connector having a terminal fitting having a terminal connection portion connected to a mating terminal on a front end side, and a terminal fitting having a wire connection portion connected to a terminal portion of the wire on a rear end side, wherein
The wire connection portion has a cylindrical shape capable of housing the wire from behind,
The connector according to claim 1, wherein the wire connecting portion is provided with a retaining means which can restrict the wire from coming off by being locked to the wire. The wire connection portion is configured such that a core wire housing portion that houses the core wire of the wire and a coating housing portion that houses the insulating coating of the wire are coaxially connected,
The retaining means is configured to cut and raise a part of the coating accommodating portion inward and cut the tip of the cut and raised piece into the insulating coating,
The terminal fitting is prevented from being pulled out by locking a locking portion formed in the housing into a locking hole formed by cutting and raising the cut and raised piece. Connectors. The connector according to claim 6, wherein the terminal connection portion is formed in a circular shape concentric with the electric wire connection portion. The outer diameter of the terminal connection portion is approximately the same as or smaller than the outer diameter of the electric wire connection portion,
9. The connector according to claim 8, wherein an outer diameter of the electric wire connection portion is substantially the same as or smaller than an outer diameter of an insulating coating of the electric wire. A terminal fitting having a terminal connection portion on the front end side and having a wire connection portion on the rear end side,
A first housing in which the terminal fitting is housed;
A second housing in which the terminal fitting is accommodated;
A connector having a relay terminal housed in the first housing,
The terminal connection portion has a round pin shape,
The wire connection portion has a cylindrical shape, and the wire connection portion is fixed in a state in which the wire is housed,
The relay terminal has a cylindrical shape with both ends open, and in a state housed in the first housing, a terminal connection portion of the terminal fitting is inserted into one opening of the relay terminal,
In a state where the first housing and the second housing are fitted, the terminal connection portion of the terminal fitting housed in the second housing is inserted from the other opening in the relay terminal, so that A connector wherein terminal fittings on one housing side and terminal fittings on the second housing side are connected via the relay terminal.

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