JP2004207156A - Crimp terminal and joint connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of wasteful material by effectively using a carrier. <P>SOLUTION: A crimp terminal 10 comprises a band-like conductive connection part 11, and a crimping part 12 which is integrally formed as rising each of both side edges of the connection part 11 and is conductive to a core wire 31 of an electric wire 30, with a cut provided to a coat of the electric wire 30. In manufacturing the crimp terminal 10, a single metal plate material is firstly punched out by a press, to form a long band-like carrier and multiple plate-like crimp forming base pieces protruding in cantilever manner from each of both side edges of the carrier, flush with the carrier surface, thus forming the connection part 11 with the carrier. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an insulation displacement terminal and a joint connector.
[0002]
[Prior art]
Conventionally, a press contact terminal is manufactured as follows. That is, first, a metal plate material is punched out by a press to form a shape in which a number of press contact terminal pieces protrude from side edges of an elongated carrier, and the press contact terminal pieces are bent and formed into press contact terminals having a predetermined shape to form a chain. Get terminals. Then, the carrier is wound around a reel, transported to a work site in this state, and the press-contact terminal piece is separated from the carrier. A technique for manufacturing a press contact terminal using such a carrier is disclosed in, for example, Patent Document 1 below.
[0003]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 5-8894 [0004]
[Problems to be solved by the invention]
However, according to the above-described conventional technology, after the pressure contact terminal element is separated from the carrier, the carrier is discarded without being reused. Therefore, there is a problem that a large amount of material is wasted.
The present invention has been completed based on the above situation, and has as its object to use carriers effectively.
[0005]
[Means for Solving the Problems]
As means for achieving the above object, the invention according to claim 1 is characterized in that a strip-shaped conductive connecting portion and the connecting portion are formed so as to rise from a side edge of the connecting portion, and a cut is made in a coating of the electric wire. It is characterized by comprising a plurality of press-contact portions capable of conducting with a core wire of an electric wire, wherein the connecting portion is formed by a carrier.
According to a second aspect of the present invention, in the first aspect, a plurality of the press contact portions are arranged in a staggered manner along the length direction of the connection portion so as to partially overlap with the connection portion interposed therebetween. It is characterized by its location.
[0006]
According to a third aspect of the present invention, in the first or second aspect, the carrier is wound around a reel, and at least one of the connecting portion and the press contact portion is to be assembled. The present invention is characterized in that a curling corrector for correcting the curling of the connecting portion is provided by engaging and holding the connecting portion with a mating member so as to be a flat surface.
[0007]
According to a fourth aspect of the present invention, there is provided a joint connector in which a press contact terminal is assembled by press-fitting into a terminal accommodating portion in a case, wherein the press contact terminal has a band-shaped conductive connecting portion and two side edges of the connecting portion. A plurality of press-contact portions formed so as to stand up from each other and capable of conducting to a core wire of the electric wire while making a cut in the covering of the electric wire, wherein the connecting portion is formed by a carrier wound on a reel. The base side of the press contact portion is fitted into the terminal accommodating portion, and the engaging portion of the press contact portion is engaged with the terminal accommodating portion in the terminal accommodating portion with this fitting, and the connection is established in this state. The part is characterized in that it is installed on the terminal receiving part as a flat surface.
[0008]
According to a fifth aspect of the present invention, in the case of the fourth aspect, the case is formed such that a pushing side of the electric wire is opened, and a cover is attached to the case so as to cover the opening side. Further, the inner surface of the cover is characterized in that a pressing portion for holding the electric wire pressed into contact with the pressing portion between the case and the case is provided.
[0009]
Function and effect of the present invention
<Invention of claim 1>
When the electric wire is pressed into the press-contact portion, the coating is broken in the press-fitting process to expose the core wire, and conduction between the core wire and the press-contact portion is established. In this case, since the connecting portion connecting the press contact portions is formed by the carrier, the carrier is effectively used without being discarded.
[0010]
<Invention of Claim 2>
Since the plurality of pressure contact portions are arranged in a staggered manner along the length direction of the connection portion in such a manner as to partially overlap with the connection portion interposed therebetween, the pressure contact portion is formed wide and has sufficient strength. And the wires can be routed with a reduced pitch in the direction in which they are arranged.
[0011]
<Invention of Claim 3>
Since the connecting portion is formed by the carrier wound on the reel, there is a concern that the winding may remain. However, in the case of the present invention, the connecting portion is engaged and held by the mating member to be assembled. Since the curl correcting section for correcting curl is provided, such curl does not remain.
[0012]
<Invention of Claim 4>
When the press contact terminal is assembled by press-fitting into the terminal accommodating portion in the case, the base side of the press contact portion is fitted into the terminal accommodating portion, and the engaging portion of the press contact portion is engaged with the terminal accommodating portion in a retaining state, and In this state, the connecting portion becomes a flat surface in the terminal accommodating portion, so that the press contact terminal is held in a state where the winding of the connecting portion is corrected.
<Invention of claim 5>
The electric wire is sandwiched between the pressing portion of the cover and the case, and is positioned and fixed to the case.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<First embodiment>
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a press contact terminal capable of conducting with a core wire of an electric wire, and reference numeral 10 in the figure indicates the entire press contact terminal. FIG. 3 is a plan view of the joint connector to which the press-connecting terminals are assembled, and reference numeral 20 in the figure indicates the entire case. In the following description, in the vertical direction, the upper side in FIG. 2 is the upper side, and in the front-rear direction, the lower side in FIG. 3 is the front side.
As shown in FIG. 1, the press contact terminal 10 includes a strip-shaped conductive connecting portion 11 and a large number of press contact portions 12 which are formed integrally from the respective side edges of the connecting portion 11.
[0014]
The press contact portions 12 are arranged in a staggered manner along the length direction of the connecting portion 11, and are configured such that the corresponding press contact portions 12 partially overlap each other across the connecting portion 11 in the width direction. Have been. Each pressure contact portion 12 is bent and formed in a crank shape when viewed from the side, and has an inner pressure contact blade 13A formed to rise upward from a side edge of the connecting portion 11 and a symmetrical shape parallel to the inner pressure contact blade 13A. , And a pair of front and rear connecting portions 14 that connect the inner and outer press contact blades 13A and 13B to each other at front and rear positions thereof. An electric wire insertion port 15 into which the electric wire 30 is inserted is opened between the pair of front and rear connecting portions 14.
At a central position in the width direction of the press contact blades 13A and 13B, a press contact groove 16 is formed by cutting into a predetermined depth, and the electric wire 30 is connected by passing the electric wire 30 through the press contact grooves 16 held by the inner and outer press contact blades 13A and 13B. The wires are arranged in a straight line so as to cross the portion 11. The upper region of the press contact groove 16 is formed to be wider toward the wire insertion opening 15 side so that it can be inserted while guiding the electric wire 30, and the lower region of the press contact groove 16 has a constant width dimension. It is formed narrow and cut into the sheath of the electric wire 30 so that it can be pressed against the core wire 31.
[0015]
Further, the press contact blades 13A and 13B are provided with a stress relaxing portion 13C that forms a circular shape continuously with the lower end of the press contact groove 16 so as to relieve the stress of the press contact blades 13A and 13B that are bent and deformed when the electric wire 30 is pressed. is there. Further, the press contact blades 13A and 13B have the engaging portions 17 protruding opposite to each other at the lower portions of the front and rear end edges thereof. The entire wall is prevented by being cut into the corresponding wall surface of the part 23.
As described above, each press contact portion 12 presses and holds one electric wire 30 at two positions by the inner and outer press contact blades 13A and 13B. In the case of the present embodiment, three press contact portions are provided on one side edge of the connection portion 11. By providing two press contact portions 12 on the other side edge, a total of five electric wires 30 can be arranged in parallel. In this case, since the press contact portions 12 are staggered along the length direction of the connecting portion 11, the pitch of the electric wires 30 can be reduced in the arrangement direction.
[0016]
Here, the connecting portion 11 is formed by a carrier that has been conventionally discarded when the press contact terminal 10 is manufactured. Specifically, in order to manufacture the press contact terminal 10 of the present embodiment, first, a single metal plate is punched out by a press to form a long strip, a carrier through which the feed holes 70 penetrate at a constant pitch, and both sides of the carrier. A large number of plate-shaped press contact portion forming pieces projecting in a cantilever form from each of the edges and flush with the carrier are formed. Next, the press contact portion forming piece is subjected to bending to form the above-described press contact portion 12 in the form of a crank. Subsequently, the carrier portion of the chain terminal is wound around a reel, and transported to a work site in that state. Then, in the work site, the carrier is set in a predetermined unit (in the case of the present embodiment, three press contact portions 12 are arranged on one side edge of the connecting portion 11 and two are arranged on the other side edge as one unit). Then, the press contact terminal 10 having the connection portion 11 formed by the carrier is formed.
[0017]
Next, a joint connector to which the press contact terminal 10 is attached will be described.
As shown in FIG. 3, the joint connector holds each of the wires 30 while arranging a large number of wires 30 in parallel, and allows the core wire 31 of each of the wires 30 to be conducted to the press-connecting terminal 10. The case 20 is formed by opening the side into which is pushed in, and the cover 40 covers the open side of the case 20. On the outer surfaces of the left and right side walls of the case 20, a temporary locking portion 21 for temporarily fixing the cover 40 to the case 20 and a full locking portion 22 for permanently fixing the cover 40 to the case 20 are provided. ing. Each of the final locking portion 21 and the temporary locking portion 22 has an inclined surface K facing upward (see FIG. 2), and the final locking portion 21 is arranged in two lower positions on the outer surface of the side wall. On the other hand, the provisional locking portion 22 is provided on the outer surface of the side wall between the main locking portions 21 (see FIG. 4).
[0018]
On the upper surface of the bottom of the case 20, a terminal accommodating portion 23 is provided for each pressure contact portion 12 in a recessed manner. As shown in FIG. 5, the press contact portion 12 can be press-fitted into the terminal accommodating portion 23 from the base end side. By engaging the engaging portion 17 with a portion of the wall surface of the terminal accommodating portion 23 corresponding to the engaging portion 17 of the press contact portion 12, the press contact terminal 10 is accommodated in the terminal accommodating portion 23 in a regular mounting posture. Will be retained. Here, since the connecting portion 11 is initially wound around the reel, there is a concern that the winding will remain. However, in the case of the present embodiment, the engagement portion 17 is engaged with the wall surface of the terminal accommodating portion 23. The curl is naturally corrected, and is laid as a flat surface on the upper surface of the bottom of the case 20. That is, the engaging portion 17 of the press contact portion 12 functions as a curl correcting portion.
[0019]
As shown in FIG. 3, a plurality of wire end insertion portions 25 each having a circular shape in plan view are provided on the rear end side of the upper surface of the bottom of the case 20. On the front side of the case 20, as shown in FIG. 5, there is provided a vertically elongated wire lead-out groove 26 which is open on the upper and lower surfaces. The wire lead-out groove 26, the press-contact groove 16 of the press-contact portion 12, and the wire end insertion portion 25 are respectively aligned on a straight line along the wiring direction of one wire 30. The wire lead-out groove 26 is provided between a large number of support portions 27 that stand up in the left-right direction, and the support portion 27 has, at the upper end thereof, a detachment prevention portion 27A of the wire 30 that is formed to extend in the left-right direction. The detachment preventing portion 27A of the electric wire 30 prevents the electric wire 30 temporarily placed above the press contact groove 16 in the press contact portion 12 from dropping from the press contact groove 16 until the cover 40 reaches the final locking position.
[0020]
Next, the cover 40 will be described. The lower surface of the cover 40 is open so as to cover the case 20, and the lower end of the rear wall is cut out so as to align with the jaw 28 at the upper end of the rear wall of the case 20. Then, it is placed so as to abut against the jaw 28.
On the inner surface of the upper wall of the cover 40, as shown in FIG. 5, a large number of pressing portions 44 hang down in parallel with each other. As the cover 40 covers the case 20, the pressing portion 44 pushes the electric wire 30 pressed against the press contact portion 12 into the press contact groove 16, and holds the wire 30 with the case 20 from above and below from above and below. ing. The pressing portion 44 has short portions 44B having short heights at two positions corresponding to the press contact blades 13A and 13B in order to avoid interference with the inner and outer press contact blades 13A and 13B. A pressing body portion 44A is formed between the dimensional portions 44B so as to protrude from above into the wire insertion opening 15 of the press contact portion 12 (see FIG. 3).
[0021]
As shown in FIG. 4, the cover 40 has a pair of cuts 41 formed in the longitudinal direction from the front and rear positions of the lower end edges of the left and right side walls, so that the side walls can be bent in and out. The inside of the notch 41 on each side wall is largely cut in a substantially U-shape so as to be open to the upper end. And a cover lock portion 43 engageable with the main locking portion 22. Further, a tapered surface R that is inclined downward is formed at the lower edge on the inner surface side of the cover lock portion 43.
[0022]
When the cover lock portion 43 elastically rides over the temporary locking portion 21 while sliding on the inclined surface K of the temporary locking portion 21 as the cover 40 is pushed in, the cover 40 reaches the temporary locking position. As shown in FIG. 6, it is configured to be clamped and fixed between the temporary locking portion 21 and the main locking portion 22. When the cover 43 is further pushed in, the cover lock portion 43 elastically climbs over the main locking portion 22 while sliding on the inclined surface K of the main locking portion 22. When the cover 40 reaches the final locking position, the cover lock portion 43 is locked with the lower surface of the final locking portion 22 so as not to come off, as shown in FIG. In the process of moving the cover 40 from the temporary locking position to the final locking position, the electric wire 30 is pushed into the narrow pressure contact groove 16 by the pressing action of the pressing portion 44 to be described later, and the pressure contact blades 13A, 13B. As a result, the coating is broken, and the exposed core wire 31 is electrically connected to the press contact terminal 10.
[0023]
Next, the operation will be described.
First, the engaging portions 17 of the press contact portions 12 are engaged with and held by the corresponding wall surfaces of the terminal accommodating portions 23, and the press contact terminals 10 are accommodated in the terminal accommodating portions 23 of the case 20. Then, the terminal of the electric wire 30 is inserted into the electric wire end insertion portion 25, the portion near the end of the electric wire 30 is temporarily placed on the upper portion of the press-contact groove 16, and the portion behind the electric wire 30 is passed through the electric wire drawing groove 26. . Subsequently, as shown in FIG. 6, the cover 40 is loosely fitted to the case 20, and the cover lock portion 43 is sandwiched between the temporary locking portion 21 and the full locking portion 22 of the case 20. In this temporary locking position, the cover locking portion 43 and the temporary locking portion 21 are engaged in a hooked state, so that the cover 40 does not fall off, and the electric wire 30 is placed above the press-contact groove 16. It is held in a temporarily placed state. When the cover 40 is further pushed down to the final locking position, the cover lock portion 43 is locked to the lower surface of the full locking portion 22, and the cover 40 is securely locked to the case 20. While the cover 40 is moving toward the final locking position, the covering of the electric wire 30 is broken by the press-contact blades 13A and 13B, and conduction between the core wire 31 and the press-contact terminal 10 is established.
[0024]
In this embodiment, since the connecting portion 11 of the press contact terminal 10 is formed by a carrier, the carrier can be effectively used without being discarded. In addition, since the press contact portions 12 are arranged in a staggered manner along the length direction of the connection portion 11 in such a manner as to partially overlap with the connection portion 11 therebetween, the press contact portion 12 is formed wide and has sufficient strength. And the pitch of the electric wires 30 can be reduced with respect to the arrangement direction.
Further, since the cover 40 is formed so as to be displaceable between the temporary locking position and the full locking position with respect to the case 20, the operator can hold the case 20 in one side when the cover 40 is temporarily fixed. Hand, and the other hand can hold the pressure welding tool or the like to perform the pressure welding operation.
[0025]
<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the press contact terminal 10 is downsized, and the joint connector is downsized corresponding to the press contact terminal 10. The other points are substantially the same as those of the first embodiment, and the same structural parts are denoted by the same reference numerals, and description of parts having the same effect is omitted.
[0026]
In the press contact terminal 10 according to the second embodiment, only a pair of press contact portions 12 are formed from each of both side edges of the connection portion 11. The press contact portion 12 includes a connecting portion 11 formed by a carrier, a front press contact blade 13F and a rear press contact blade 13R that are bent from front and rear positions of both side edges of the connection portion 11, and both ends of both press contact blades 13F and 13R. And a connecting portion 14 connecting the two at the position.
The joint connector according to the second embodiment includes a case 20 provided with a terminal accommodating portion 23 for accommodating and holding the press contact terminal 10 and a cover (not shown). In the case 20, a wire terminal accommodating portion 25 is recessed at a position near the front of the bottom upper surface corresponding to the right pressure contact portion 12 in FIG. 8 of the pair of pressure contact portions 12. An electric wire drawing groove 26 for passing the electric wire pressed by the press contact portion 12 is formed. In the case 20, a wire passage groove 29 for passing a wire is formed on the front and rear end surfaces of the pair of press contact portions 12 corresponding to the left press contact portion 12 in FIG. A branch line held in the case 20 through the wire drawing groove 26 and a trunk line crossing the inside of the case through the wire passing groove 29 are electrically connected through the press contact terminal 10.
[0027]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and furthermore, besides the following, within the scope not departing from the gist. Can be implemented with various modifications.
[0028]
(1) As shown in FIGS. 13 and 14, the cover 40 and the case 20 may be connected by a flexible hinge 50.
(2) The curl correcting portion for correcting the looseness of the connecting portion is provided in the pressing portion in the above embodiment, but may be provided in the connecting portion.
(3) The object to which the press contact terminal is to be assembled is not limited to the joint connector, but may be a simple case.
[Brief description of the drawings]
FIG. 1 is a perspective view of a press contact terminal according to a first embodiment of the present invention. FIG. 2 is a front view of the press contact terminal and the case separated from each other. FIG. 3 is a plane view of the case and cover separated from each other. FIG. 4 is a side view. FIG. 5 is a cross-sectional view. FIG. 6 is a cross-sectional view of a state where the cover is temporarily fixed at a temporary locking position. FIG. 8 is a plan view of a case according to the second embodiment of the present invention. FIG. 9 is a sectional view taken along line AA of FIG. 8. FIG. 10 is a sectional view taken along line BB of FIG. FIG. 12 is a front view of the joint connector. FIG. 13 is a plan view of a joint connector according to another embodiment of the present invention. FIG. 14 is a side view of the joint connector.
Reference numeral 10: press contact terminal 11: connecting portion 12: press contact portion 17: engaging portion (rolling correction portion)
20 case 23 terminal receiving part 30 electric wire 31 core wire 40 cover 44 pressing part

Claims (5)

A belt-shaped conductive connecting portion, and formed from a plurality of press-contact portions formed to rise from the side edge of the connecting portion and capable of conducting with the core wire of the electric wire while making a cut in the coating of the electric wire,
The press-connecting terminal, wherein the connecting portion is formed by a carrier. 2. The press contact according to claim 1, wherein a plurality of the press contact portions are arranged in a staggered manner along a length direction of the connection portion so as to partially overlap with the connection portion interposed therebetween. 3. Terminal. Wherein the carrier is wound on a reel,
At least one of the connection portion and the pressure contact portion is engaged and held so that the connection portion has a flat surface with respect to a mating member to be assembled, thereby correcting the curl of the connection portion. The press contact terminal according to claim 1, further comprising a curling corrector. A joint connector in which the press-connecting terminal is assembled by press-fitting into a terminal accommodating portion in the case,
The pressure contact terminal is formed integrally with a conductive connecting portion in the form of a band and rising from each of both side edges of the connecting portion, and a plurality of pressure contact terminals capable of conducting with the core wire of the electric wire while cutting the covering of the electric wire. And the connecting portion is formed by a carrier wound on a reel,
The base side of the press contact portion is fitted into the terminal accommodating portion, and the engaging portion of the press contact portion is engaged with the terminal accommodating portion in the terminal accommodating portion with this fitting, and in this state, the connecting portion is A joint connector, wherein the joint connector is provided as a flat surface in the terminal accommodating portion. The case is formed such that the pushing side of the electric wire is opened, and a cover is attached to the case so as to cover the open side, and an inner surface of the cover is pressed against the pressing portion. The joint connector according to claim 4, further comprising a pressing portion for holding the electric wire sandwiched between the case and the case.

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