JP2002313446A - Support structure and supporting method of press contact terminal and press joint box - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve the reliability of electrical connection between an insulation displacement terminal and an electric wire. Tip of the pressure contact terminal 2 is the A wire 6 in pressure contact, the insertion portion 5 of the inner width L ₁ smaller than the outer width L ₂ of the press-connecting terminal
Is inserted into. The inner width in the thickness direction of the insertion portion 5 is a dimension that can support the press contact terminal 2 in the thickness direction without play. The bottom end 1 of the slot 15 between the pair of press contact pieces 7 of the press contact terminal 2
5a was buried inside the insulating part 1 on the mounting side, and the insulating part was attached on the bottom end. The insulating part 1 was a part of the base housing, and the insertion part 5 was provided on the cover 4 that was covered by the base housing. The insertion portion 5 may be formed inside the peripheral wall protruding from the cover, and the bottom end 15a of the slot 15 of the press contact terminal 2 may be embedded inside the projection protruding from the base housing. The supporting structure of the press contact terminal is
Applies to multiple crimped joint boxes standing on the busbar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a crimping joint box or the like, and a supporting structure and a supporting method of a crimping terminal which prevent the opening of the crimping terminal after wire crimping and improve the reliability of electrical connection and the same. The present invention relates to a press-fit joint box to which is applied.

[0002]

2. Description of the Related Art FIG. 8 shows an embodiment (see Japanese Utility Model Laid-Open Publication No. 62-28364) of a conventional connector supporting structure of a press contact terminal.

[0003] This structure is such that a connection terminal 4 made of conductive metal is provided in a terminal accommodating chamber 42 of a connector housing 41 made of synthetic resin.
3 is housed, and the press contact terminal portion 44 of the connection terminal 43 is projected from the connector housing 41 to the outside so as to enter the inside of the cover 45 made of synthetic resin. Pressure contact terminal part 4 on electric wire 47
4 is pressed and connected, and a projection 49 is provided on the outer end of the pair of left and right press contact pieces 48 of the press contact terminal section 44, and when the pair of press contact pieces 48 pass through the hole 51 of the base wall 50 of the cover 45. The projection 49 contacts the inner surface of the hole 51 to prevent the pair of press-contact pieces 48 from spreading, and the pair of press-contact pieces 48
The wire 47 is pressed into the slot (slot), and after the wire is pressed, the projection 49 is located in the wide cable insertion opening 52.

Immediately after the electric wire 47 is pressed, the cover 45 is locked to the connector housing 41 by locking means (not shown).
The body of the connection terminal 43 includes, for example, an electric wire connection portion 53, and an electric wire (not shown) is led out of the opening of the terminal accommodating chamber 42. The connection terminal 43 to which the electric wire (not shown) is connected is inserted into the connector housing 41, and then the electric wire 47 is pressed. The crimping operation of the electric wire 47 is performed by the sharp end of each crimping piece 48 piercing through the vinyl insulating coating of the flat cable 46 and the core portion of the electric wire 47 is pressed into the slot 54.

[0005] Instead of the electric wire connection portion 53, a female elastic contact portion 53 for an external pin-shaped male terminal (not shown) can be used. The connector 55 is composed of the connector housing 41 and the connection terminals 43.

[0006]

However, in the conventional support structure of the press contact terminal 44 in the connector 55, after the electric wire 47 is pressed, the press contact terminal 44 is inserted into the hole 56 below the cover 45. Because of the presence of the gap, the contact pressure (contact pressure) of the press contact terminal 43 with respect to the core portion of the electric wire 47 is weakened with time, so that the reliability of the electrical connection is reduced or the electric wire 47 is strongly pulled. There is a concern that when a force is applied, the press contact terminal 44 is deformed and the electric wire 47 is likely to come off.

If the core portion of the electric wire 47 is strongly pressed against the bottom end 54a of the slot 54 of the press-connecting terminal 44 at the time of pressure welding, the core portion is liable to be cut, thereby also increasing the reliability of the electrical connection. There was concern that it would decline. In order to prevent the core portion from being cut, the press-fitting depth of the electric wire 47 must be accurately regulated (controlled), which requires man-hours and devices, which may increase the cost.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a means for supporting a crimp terminal which can improve the reliability of electrical connection between the crimp terminal and the electric wire, and more specifically, the contact pressure of the crimp terminal against the electric wire. It is necessary to improve the strength of the insulation displacement terminal to prevent deformation of the insulation displacement terminal and disconnection of the electric wire, and also to prevent the core wire from being broken in the insulation displacement terminal and to facilitate the operation of insulation displacement. It is an object of the present invention to provide a supporting structure and a supporting method for a press-connecting terminal, and a press-fitting joint box to which the same is applied.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a support structure for a press contact terminal, wherein a tip end of the press contact terminal to which an electric wire is pressed is smaller than an outer width of the press contact terminal. It is characterized in that it is inserted into a width insertion portion. According to the above configuration, in a state where the electric wire is pressed against the press contact terminal, the press contact terminal is slightly pressed into the insertion portion, and the press contact terminal is urged in the wire clamping direction. Thereby, the contact pressure between the core portion of the electric wire and the press contact terminal is kept constant without decreasing over time.

According to a second aspect of the present invention, there is provided a supporting structure for a press contact terminal according to the first aspect, wherein the inner width of the insertion portion in the thickness direction is such that the press contact terminal does not rattle in the plate thickness direction. It is a dimension that can be supported. With the above configuration, the press contact terminal is positioned and held immovably in the plate thickness direction in the insertion portion, so that even if a force in the plate thickness direction of the press contact terminal acts due to tension of the wire or the like, bending deformation of the press contact terminal or deformation of the wire may occur. The escape is prevented.

According to a third aspect of the present invention, the bottom end of the slot between the pair of press contact pieces of the press contact terminal is embedded in the insulating portion on the mounting side, and the insulating portion is placed on the bottom end. Is attached. According to the above configuration, the actual use length of the press contact piece is reduced, the elastic force in the width direction (the direction perpendicular to the plate thickness) of the press contact piece is increased, and the electric wire clamping force, that is, the contact pressure is increased. In addition, the bottom end of the slot is covered and protected by an insulating part, and the core of the wire does not come into contact with the bottom end of the slot when the wire is pressed. Is done. The wire contacts the surface of the insulation part at a distance from the bottom end of the slot.

According to a fourth aspect of the present invention, there is provided a support structure for a press contact terminal, wherein the support structure for a press contact terminal according to the first or second aspect further comprises a support structure for the press contact terminal according to the third aspect. According to the above configuration, the operation and effect according to claim 1 or 2 and the operation and effect according to claim 3 act synergistically, and the reliability of the electrical connection between the electric wire and the press contact terminal is further improved.

According to a fifth aspect of the present invention, there is provided a supporting structure for a press contact terminal according to the fourth aspect, wherein the insulating portion is a part of a base housing, and the insertion portion is covered by the base housing. It is characterized by being provided in the cover which is done. According to the above configuration, at the same time as closing the cover to the base housing, the distal end portion of the press contact terminal is slightly pressed into the insertion portion, so that the same operation and effect as in claim 1 are achieved, and the press contact terminal is accurately inserted at the insertion portion. And short-circuiting between adjacent pressure contact terminals is prevented. Further, since the distal end portion of the press contact terminal is housed in the insertion portion of the cover, the height between the base housing and the cover can be reduced.

According to a sixth aspect of the present invention, in the support structure of the press terminal according to the fifth aspect, the insertion portion is formed inside a peripheral wall protruding from the cover, and / or
Alternatively, a bottom end of the slot of the press contact terminal is embedded in a protrusion protruding from the base housing. According to the above configuration, the depth of the insertion portion is secured by the peripheral wall, and the cover can be made thinner. Similarly, the protruding portion secures the embedding depth of the base of the press contact terminal, and allows the base housing to be thinned.

According to a seventh aspect of the present invention, there is provided a pressure welding joint box comprising the pressure welding terminal support structure according to the fifth or sixth aspect,
A plurality of the pressure contact terminals are provided on the bus bar. With the above configuration, in the joint box for jointly connecting a plurality of electric wires via the bus bar, the distal end of the press contact terminal is slightly pressed into the insertion portion, the contact pressure with the electric wire increases, and the press contact terminal is inserted in the insertion portion. It is fixed in the thickness direction, preventing deformation of the insulation displacement terminal and pulling out of the electric wire due to tension of the electric wire, and accurately positioning and protecting the insulation displacement terminal at the insertion portion, preventing short circuit between adjacent insulation displacement terminals, In addition, since the tip of the press contact terminal is housed in the insertion portion, the height of the joint box can be reduced, and the joint box can be reduced in size and cost by making the cover thinner and the base housing thinner. Become.

According to a eighth aspect of the present invention, there is provided a method for supporting a press contact terminal, comprising: after pressing a wire against the press contact terminal, inserting the distal end of the press contact terminal into an insertion portion having an inner width smaller than the outer width of the press contact terminal. Features. According to the above configuration, in a state where the electric wire is pressed against the press contact terminal, the press contact terminal is slightly pressed into the insertion portion, and the press contact terminal is urged in the wire clamping direction. Thereby, the contact pressure between the core portion of the electric wire and the press contact terminal is kept constant without decreasing over time.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show one embodiment of a support structure for a press contact terminal and a method for supporting a press contact terminal according to the present invention.

The supporting structure of the press contact terminal is such that the base 3 of the press contact terminal 2 is embedded and fixed in a substrate (base wall or insulating portion) 1 made of insulating resin by insert molding or the like, and a cover 4 made of insulating resin. An insertion hole (insertion portion) 5 for inserting the distal end of the press-connecting terminal 2 slightly into the press-fit terminal 2 is formed. (FIG. 2) in which the pair of press contact pieces 7 of the press contact terminal 2 are urged in the closing direction as shown by the arrow A.

The method of supporting the press contact terminal is as follows. The base 3 of the press contact terminal 2 is embedded and fixed in the insulating resin substrate (base wall) 1 by insert molding or the like, and the electric wire 6 is pressed against the press contact terminal 2. Thereafter, the distal end of the press contact terminal 2 is slightly pressed into an insertion hole (insertion portion) 5 provided in the cover 4 made of insulating resin.
The present invention is characterized in that a pair of press contact pieces 7 of the press contact terminal 2 are urged in a closing direction as shown by an arrow A (FIG. 2).

According to the above-described configurations, the pair of press contact pieces 7 are prevented from being opened after the wire press contact, and the pair of press contact pieces 7 are positively urged in the closing direction. The contact between the core portion 6a and the inner side surfaces 7a of the pair of pressure contact pieces 7 is always maintained at an appropriate contact pressure (contact pressure), and the contact pressure is reduced with time, that is, the core portion (conductor portion) 6a and each Deterioration of contact with the press contact piece 7 is prevented, and reliability of electrical connection is improved.

In FIG. 1, the inner width L of the insertion hole 5 of the cover 4 is shown.
₁Is outside the press-connecting terminal 2 in a free state before the wire 6 is pressed.
Width L_TwoIt is set a little narrower than. Outside the insulation displacement terminal 2
Width L _TwoMeans vertical outer surfaces of the pair of pressure contact pieces 7 (outside
End) The shortest horizontal distance connecting the 7b. Insertion hole 5
Inner width L₁Is in contact with each outer side surface 7b of the pair of pressure contact pieces 7.
The shortest horizontal distance between each vertical inner surface (inner edge) 8
To tell.

The ratio of decreasing the inner width L ₁ of the insertion hole 5 of the cover 4 with respect to the outer width L ₂ of the press contact terminal 2 is such that the front end of the press contact terminal 2 pressed against the electric wire 6 as shown in FIG. When inserted into the insertion hole 5, it is necessary that the core portion 6a of the electric wire 6 does not receive excessive compressive force. This is because if the cord 6a receives a strong compressive force, the cord 6a may be cut. When the electric wire 6 is pressed in FIG.
Although the pair of press contact pieces 7 slightly open outward (they do not completely recover over time), when the press contact terminals 2 in FIG.
It is preferable that the opening of the pair of press-contact pieces 7 is corrected to be zero (the pair of press-contact pieces 7 are parallel) or minus (the pair of press-contact pieces 7 close slightly inward than parallel).

As shown in FIG. 1, the tip of each pressure contact piece 7 is formed such that the inside and outside are tapered, and the inside slope (slope surface) 9 serves as a wire guide when the wire 6 is pressed. The outer inclined portion (inclined surface) 10 serves as an insertion guide portion when the distal end portion of the press contact terminal 2 is inserted into the insertion hole 5 of the cover 4. The tip of the press-contacting piece 7 is not sharp but has a slightly flat surface 11.

A curved (tapered) guide surface 12 is formed at the entrance of the insertion hole 5 of the cover 4, and the guide surface 12 is a straight, parallel left and right inner side surface 8 in the middle of the insertion hole 5.
Then, each inner side surface 8 has an inclined portion 1
Following the tapered inclined surface (inclined portion) 13 corresponding to 0,
The left and right inclined surfaces 13 continue to a horizontal inner surface 14 at the bottom (top) of the insertion hole 5.

As shown in FIG. 2, the parallel outer end 7 of the pressure contact terminal 2
When the inclined portion 10 on the outer end of the press contact terminal 2 comes into contact with the inclined surface 13 of the insertion hole 5 in a state in which the press contact terminal b is pressed against the inner end of the insertion hole by surface contact, the viewpoint of the stability of the posture of the press contact terminal 2 and the like. Is preferred. It is necessary that at least the parallel outer end 7b of the press contact terminal 2 is in close contact with the inner end 8 of the insertion hole 5 by surface contact. Since the outer end 7b of the press contact terminal is in surface contact with the inner end 8 of the insertion hole 5, the force in the wire clamping direction is reliably transmitted to the pair of crimping pieces 7.

The inner width L ₁ of the insertion hole 5 is set to be wider than that described above, and only the inclined portion 10 outside the tip of the press contact terminal 2 is pressed against the inclined surface 13 of the insertion hole 5, whereby the press contact terminal 2 is pressed. Can be urged in the closing direction, but as described above, the parallel outer end 7b of the press contact terminal 2 is connected to the inner end 8 of the insertion hole 5.
To press the pair of pressure contact pieces 7 in the plate width direction, that is, the direction perpendicular to the outer end 7b, from the viewpoint of securely holding the core portion 6a of the electric wire 6.

It is sufficient that the depth of the insertion hole 5 of the cover 4 is about half of the protruding (exposed) length of the press contact terminal 2, and may be less than that. The dimension corresponding to the inner width of the insertion hole 5 in the thickness direction, that is, the thickness of the press contact terminal 2 is
Slightly wider than the thickness of the
This prevents the pair of press contact pieces 7 from being displaced in the plate thickness direction (the direction separating from each other), and the pair of press contact pieces 7 are always located to face left and right, and the core portion 6a of the electric wire 6 is provided. The contact pressure is properly secured by strongly clamping the right and left.

Further, since the press contact terminal 2 supported in a cantilever state before the insertion is supported in a doubly supported state after the insertion, the mechanical strength of the press contact ends 2 is improved. Thereby, even if a strong tensile force acts on the electric wire 6 after the cover 4 is closed and the force in the thickness direction acts on the press contact terminal 2, the press contact terminal 2 is bent or the electric wire 6 is moved from the press contact terminal 2. Will not escape.

Further, since the press contact terminals 2 are accurately positioned in the insertion holes 5 of the cover 4, even when a plurality of press contact terminals 2 are arranged close to each other, contact (short circuit) between the press contact terminals 2 occurs.
Is prevented. In addition, since the distal end or upper half of the press contact terminal 2 is securely protected in the insertion hole 5, interference with the outside is prevented, and there is no fear of deformation of the distal end of the press contact terminal 2.

The inclined portion 10 outside the distal end portion of the press contact terminal 2 is effective for smoothly guiding the insertion terminal 5, but even if the outer inclined portion 10 is not provided, the outside of the press contact piece 7 is effective. By pressing the end 7b against the inner end 8 of the insertion hole 5, the contact pressure in the wire clamping direction can be appropriately maintained. In this case, the shape of the insertion hole 5 is rectangular.

In FIG. 1, the base 3 of the press contact terminal 2 is embedded in a substrate (base wall) 1 made of synthetic resin, and a pair of press contact pieces 7 are provided.
The bottom end 15 a of the slot 15 and the upper part thereof are embedded in the substrate (base wall) 1. That is, the pair of pressure contact pieces 7 are embedded in the insulating resin material (substrate 1) and fixed at a position slightly apart from the bottom end 15a of the slot 15 in the height direction. The bottom end 15a of the slot 15 is located in the insulating resin material, and the insulating resin material is also filled (deposited) on the bottom end 15a. The slot 15 is exposed to the outside from the middle in the height direction.

With this configuration, the actual use length of the pair of press contact pieces 7 is reduced (exposed length), the elastic force in the opening and closing direction (plate width direction) of the pair of press contact pieces 7 is increased, and the The contact pressure on the wire portion 6a is increased, and the reliability of the electrical connection is increased.

Also, since the bottom end 15a of the slot 15 is embedded in the resin material, the core 6a
Is not pressed against the bottom end 15a of the slot 15, and there is no danger that the core 6a of the electric wire 6 will be pressed against the bottom end 15a of the slot 15 and cut as in the conventional case. At the time of pressure welding, the insulating coating 6b of the vinyl material on the outer side of the electric wire 6 comes into contact with the substrate (base wall) 1, and the inner core portion 6a is separated from the substrate 1 by a distance corresponding to the thickness of the insulating coating 6b. I do.

Accordingly, the electric wire 6 is connected to the slot 1 as in the prior art.
It is not necessary to precisely regulate the distance for press-fitting along 5, and the man-hours and devices required for the control become unnecessary. Electric wire 6
The wire 6 may be press-fitted into the slot 15 until the insulating coating 6b abuts on the substrate (base wall) 1, thereby simplifying the press-contacting operation and simplifying the device.

The insertion hole 5 of the cover 4 has the bottom (top) 14 sealed for waterproofing and dustproofing. However, if waterproofing or dustproofing becomes necessary, the insertion hole penetrated to the outside. It is also possible to use an (insertion part) (not shown).
The board (base wall) 1 is applicable as a base wall of a circuit board, a press-connecting connector, a joint connector, a press-fitting joint box, or the like. The cover 4 is applicable as a cover for an electric connection box, a joint connector, a joint box, or the like. Further, the substrate (base wall) 1 may be formed of an insulating ceramic or the like instead of a synthetic resin material.

FIGS. 3 and 4 show an embodiment of a press-fitting joint box (also referred to as a joint connector) to which the above-described press-connecting terminal support structure is applied. The same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description will be omitted.

This press-fit joint box 18 comprises a base housing 19 made of synthetic resin and a base housing 1.
9, a cover 4 made of a synthetic resin, which is provided to be openable and closable via a thin hinge 21, a plurality of press-contact terminals 2 disposed on a base wall (insulating portion) 1 of a base housing 19, and a base wall 1.
Bus bar 2 buried inside and interconnecting the insulation displacement terminals 2
And 2.

The press contact terminal 2 and the bus bar 22 are integrated as shown in FIG. 5, and a pair of press contact terminals 2 are formed upright at both ends of the bus bar 22. The pair of press contact terminals 2 is 90
It is arranged so as to turn in the ° direction. The press contact terminal 2 and the bus bar 22 are formed by punching and bending a conductive metal plate, and the press contact terminal 2 and the bus bar 22 constitute a joint bus bar 23. Each pressure contact terminal 2 is raised at a right angle from a horizontal plane above the bus bar 22.

In FIG. 3, two joint bus bars 23 are arranged side by side. In the bus bar 22, the base 3 of the press contact terminal 2, that is, the bottom end 15a of the slot 15 in FIG. 1 and the upper part thereof are integrally insert-molded and fixed inside the base wall 1, that is, the insulating resin material. Each pressure contact terminal 2 protrudes higher than the upper opening 24 of the base housing 19.

Semi-circular electric wire insertion grooves 27 are provided in the three walls 25 and 26 of the base housing 19 except for the hinge 21 side, and the wall 26 opposite to the hinge 21 serves as a locking means for the cover 4. A locking projection 29 is formed.

The cover 4 is provided with an insertion hole 5 into which the tip or upper half of each pressure contact terminal 2 is inserted. Four insertion holes 5 are provided corresponding to the positions of the press contact terminals 2, and each pair of insertion holes 5 is arranged in the 90 ° direction. A semicircular wire insertion groove 32 is provided in three walls 30 and 31 of the cover 4 except for the hinge 21 side, and a flexible engagement with the locking projection 29 is provided in the wall 31 opposite to the hinge 21. A joint frame 33 is provided. The locking means is not limited to the locking projection 29 and the engagement frame piece 33, and various types can be appropriately set.

By closing the cover 4 as shown in FIG. 4, the electric wire insertion grooves 27 are united to form a circular electric wire insertion hole 34. The box body is constituted by the cover 4 and the base housing 19. With the cover 4 opened as shown in FIG. 3, the electric wires 6 are pressed against the respective press-connecting terminals 2. FIG. 6 shows the connection state of the electric wire 6. The direction parallel to the hinge 21 (FIG. 3) (X
Direction), two electric wires 6 are inserted so as to penetrate through the base housing 19, and in this state, each electric wire 6 is pressed against the press contact terminal 2, and the two electric wires 6 in the Y direction on the side opposite to the hinge 21 (FIG. 3). 6 is disposed and pressed against the pressure contact terminal 2. The electric wire 6 is jointly connected to the insulation displacement terminal 2 via the bus bar 22. When the hinge 21 (FIG. 3) is not used, the electric wire 6 can be arranged so as to penetrate also in the Y direction. Electric wires (not shown) other than the joint wire 6 are connected to the base housing 1.
9 can also be inserted.

When the cover 4 is closed after the electric wire is pressed, the tip of each press contact terminal 2 is inserted into the insertion hole 5 of the cover 4 (FIG. 3). It goes without saying that the inner width of the insertion hole 5 is smaller than the outer width of the press contact terminal 2. Thereby, the pressure contact terminal 2
Are pressed in the closing direction to firmly clamp the core portion 6a (FIG. 2) of the electric wire 6, thereby increasing the reliability of the electrical connection, and The half part is accurately positioned by the cover 4 and the adjacent press-connecting terminals 2 and electric wires 6
Is prevented from being interfered with. The cover 4 is provided with locking means 29, 33
Is fixed to the base housing. By inserting the tip or upper half of the press contact terminal 2 into the top wall 35 of the cover 4, the height of the joint box 18 can be kept low, and the joint box 18 can be reduced in size.

The base housing 19 and the cover 4 do not necessarily have to be sealed by the four walls 25, 26, 30, 31. If there is no need for waterproofing depending on the place of use, the walls 25, 26, An opening or the like may be formed in 30, 31. Further, the number of the press contact terminals 2 is not limited to the above embodiment. The press contact terminals 2 can be provided upright at both ends of the bus bar 22 and / or at an intermediate portion in the longitudinal direction.

As shown in FIG. 7, the thickness of the top wall 35 'of the cover 4' is reduced so that the top wall 35 'is
It is also possible to secure the depth of the insertion hole 5 by integrally protruding the peripheral wall 36 having a rectangular annular shape or an oval shape. In addition, the thickness of the base wall (bottom wall or insulating portion) 1 ′ of the base housing 19 ′ is reduced, and a rectangular or oval protruding portion 37 is integrally formed around the press contact terminal 2 from the base wall 1 ′. By projecting, the bottom of the slot 15 of the press contact terminal 2 can be embedded in the projection 37. Slot 1
A projection 37, which is an insulating resin material, is attached on the bottom end 15a of the fifth member 5.

The cover 4 'may have the peripheral wall 36, the base housing side may have the same configuration as in FIG. 1, the base housing 1' may have the protrusion 37, and the cover side may have the same configuration as in FIG. 7, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

[0047]

As described above, according to the first aspect of the present invention, the crimp terminal is slightly pressed into the insertion portion while the wire is crimped to the crimp terminal, and the crimp terminal is moved in the wire clamping direction. Since the pressure is applied, the contact pressure between the core portion of the electric wire and the press contact terminal is kept constant without decreasing over time, thereby improving the reliability of the electrical connection.

According to the second aspect of the present invention, since the press contact terminal is positioned and held in the insertion portion in the plate thickness direction, a force in the plate thickness direction of the press contact terminal acts even if the electric wire is pulled. Even in such a case, bending deformation of the press contact terminal and removal of the electric wire are prevented, thereby improving the reliability of the electrical connection.

According to the third aspect of the present invention, the actual use length of the pressure contact piece is shortened, the elastic force in the width direction (the direction perpendicular to the plate thickness) of the pressure contact piece is increased, and the electric wire clamping force, that is, the contact pressure is reduced. As the height increases, the bottom end of the slot is covered with an insulating part and protected, and the core of the wire does not come into contact with the bottom end of the slot during wire pressure welding. Are prevented, which improves the reliability of the electrical connection.

According to the fourth aspect of the present invention, the effect of the first or second aspect and the effect of the third aspect act synergistically to improve the reliability of the electrical connection between the electric wire and the press contact terminal. Is further improved.

According to the fifth aspect of the present invention, at the same time that the cover is closed to the base housing, the distal end of the press contact terminal is slightly pressed into the insertion portion, so that the same operation and effect as those of the first aspect are achieved. At the same time, the press contact terminals are accurately positioned and protected by the insertion portion, thereby preventing short circuit between the adjacent press contact terminals, thereby improving the reliability of the electrical connection.

According to the sixth aspect of the present invention, the depth of the insertion portion is ensured by the peripheral wall, the thickness of the cover can be reduced, and the depth of insertion of the base of the press contact terminal is ensured by the protrusion. Since the thickness of the base housing can be reduced, the structure around the connecting portion can be made compact, and the cost can be reduced by reducing the materials of the cover and the base housing.

According to the seventh aspect of the present invention, in the joint box for connecting a plurality of electric wires via the bus bar, the distal end of the press contact terminal is slightly inserted into the insertion portion so as to be connected to the electric wire. The pressure is increased, and the press contact terminals are accurately positioned at the insertion portion, thereby preventing short circuit between the adjacent press contact terminals, thereby improving the reliability of electrical connection, and reducing the thickness of the cover and the base housing. By reducing the thickness, the joint box can be reduced in size.

According to the present invention, in a state where the electric wire is pressed against the press contact terminal, the press contact terminal is slightly pressed into the insertion portion, and the press contact terminal is urged in the wire clamping direction, As a result, the contact pressure between the core portion of the electric wire and the press contact terminal is kept constant without decreasing over time.
The reliability of the electrical connection is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state before assembling of one embodiment of a supporting structure and a supporting method of a press contact terminal according to the present invention.

FIG. 2 is a longitudinal sectional view showing a state after assembly.

FIG. 3 is a perspective view showing an embodiment of a press-joint box to which the above-described press-contact terminal support structure is applied.

FIG. 4 is a perspective view showing a state in which the cover of the press contact joint box is closed.

FIG. 5 is a perspective view showing one embodiment of a joint bus bar used for a pressure welding joint box.

FIG. 6 is a plan view showing a joint connection state of electric wires in the pressure welding joint box.

FIG. 7 is a longitudinal sectional view showing a main part of another embodiment of the press-fit joint box.

FIG. 8 is a longitudinal sectional view showing a connector assembly having a press contact terminal support structure as one form of the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Substrate or base wall (insulating part) 2 Pressure contact terminal 4, 4 'cover 5 Insertion hole (insertion part) 6 Electric wire 7 Pressure contact piece 15 Slot 15a Bottom end 18 Pressure contact joint box 19, 19' Base housing 22 Bus bar 36 Peripheral wall 37 Projection part L ₁ within the width L ₂ outer width

Claims (8)

[Claims] 1. A supporting structure for a pressure contact terminal, wherein a tip end of the pressure contact terminal pressed against an electric wire is inserted into an insertion portion having an inner width smaller than an outer width of the pressure contact terminal. 2. The supporting structure for a pressure contact terminal according to claim 1, wherein the inner width of the insertion portion in the thickness direction is a dimension capable of supporting the pressure contact terminal without play in the plate thickness direction. 3. A bottom end of a slot between a pair of press contact pieces of the press contact terminal is buried inside an insulating portion on a mounting side, and the insulating portion is attached on the bottom end. Support structure for press contact terminals. 4. The supporting structure of a press terminal according to claim 1, further comprising the support structure of the press terminal according to claim 3. 5. The support structure for a press contact terminal according to claim 4, wherein said insulating portion is a part of a base housing, and said insertion portion is provided on a cover which is covered by said base housing. . 6. The insertion portion is formed inside a peripheral wall protruding from the cover, and / or a bottom end of the slot of the press-contact terminal is embedded in a projection protruding from the base housing. 6. The support structure for a press contact terminal according to claim 5, wherein: 7. A pressure joint box comprising the pressure terminal supporting structure according to claim 5, wherein a plurality of the pressure terminals are erected on a bus bar. 8. A method for supporting a crimp terminal, comprising: after crimping an electric wire to the crimp terminal, inserting a tip end of the crimp terminal into an insertion portion having an inner width smaller than an outer width of the crimp terminal.