JPH0950834A - Wire pressure welding connector - Google Patents

Abstract

(57) [PROBLEMS] To provide an electric wire pressure welding connector capable of reliably maintaining an electrical connection state by using the same housing even for covered electric wires having different outer diameters. SOLUTION: In a press-connecting connector (1) for press-connecting a covered electric wire (W, Ws) to a slot (27) of a press-connecting terminal (5) provided in a housing (3), the press-connecting terminal (5) has a housing (3). ) Has a terminal board portion (23) fixed to the bottom plate (3c), and the slot (27) is formed on the side wall portion (21a) standing from the terminal board portion (23). ) For crimping the covered electric wires (W, Ws) on both sides of the slot (27).
1, 33) are provided, it is possible to adjust the movement amount when pressing the caulking jig according to the outer diameter of the covered electric wire (W, Ws), regardless of the difference in outer diameter. , Covered wire (W,
Ws) can be pressure-connected with the slot (27) and can be crimped on both sides of the slot (27).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire pressure welding connector used for connecting covered wires to each other.

[0002]

2. Description of the Related Art FIG. 9 is a sectional view showing a conventional pressure contact connector of this type described in Japanese Utility Model Laid-Open No. 61-109072.

As shown in FIG. 9, a wire pressure welding connector 71 is provided.
Is a housing 73 whose upper surface is open and a housing 7
A pressure contact terminal 75 housed in the housing 3 and a cover 77 for closing the upper surface of the housing 73 are provided.

A wire accommodation groove 79 for accommodating the covered electric wire W is provided at an upper end portion of the opposite side wall 73a of the housing 73, and an electric wire support projection 81 for supporting the covered electric wire W is provided on a bottom surface 73b of the housing 73. ing. The bottom of the wire receiving groove 79 and the upper surface of the wire supporting protrusion 81 are separated from each other in the height direction of the housing 73 so as to have a step H of a predetermined distance. The pressure contact terminal 75 is provided on the upper surface of the wire support protrusion 81.
Is formed with a terminal support groove 85 to which the continuous substrate 83 of is fixed.

As shown in FIG. 10, the press contact terminal 75 has a U-shaped slot 87 forming a press contact blade, and the slot 8
When the covered electric wire W is pressed from above between the tips of the wires 7, the slot 87 cuts off the covered portion 41 of the covered electric wire W and electrically connects with the core wire portion 43.

As shown in FIG. 9, an electric wire pressing protrusion 89 is provided on the lower surface of the cover 77 to press the covered electric wire W into the housing 73 and press-connect it to the press-connecting terminal 75. The electric wire pressing protrusions 89 are provided at positions corresponding to the outer sides of the press contact terminals 75 at appropriate intervals. On the side surface of the cover 77, an electric wire support protrusion 91 is provided so as to sandwich the covered electric wire W accommodated in the electric wire accommodation groove 79 with the electric wire accommodation groove 79.

When the covered electric wire W is routed, the covered electric wire W is accommodated in the electric wire accommodating groove 79 of the housing 73,
Predetermined wiring is carried out in a state of being temporarily held, and the cover 77 is closed after the wiring is completed. When the cover 77 is closed, the covered electric wire W is inserted by the electric wire pressing protrusion 89 from between the tips of the slots 87, the covering portion 41 is cut off, and the core wire portion 43 is electrically connected to the press contact terminal 75. At this time, the covered electric wire W is sandwiched between the electric wire pressing projection 89 and the electric wire supporting projection 81 while being pressed and compressed so as to have the step H on both sides of the press contact terminal 75, and the electric wire supporting projection 91 and the electric wire It is sandwiched between the accommodation grooves 79 and fixed in the housing 73. That is, in the covered electric wire W, the bent portion 93 is formed by the step H in the housing 73.

According to the electric wire pressure contact connector 71, even if an axial tensile force is applied to the covered electric wire W, the load is absorbed by the bending portion 93 having the step H, so that the covered electric wire W and the pressure contact terminal 75. The electrical connection state with can be reliably maintained.

[0009]

However, in such an electric wire pressure contact connector 71, when an attempt is made to connect a small diameter covered electric wire Ws to the pressure contact terminal 75 as shown in FIG.
The distance between the wire pressing protrusion 89 and the wire supporting protrusion 81, and the distance between the wire supporting protrusion 91 and the wire housing groove 79 are formed according to the outer diameter of the thick covered wire W (FIG. 9). Therefore, since the covered electric wire Ws is not sandwiched between the two and the step h formed is smaller than the step H in the case of a large diameter,
The holding power of the covered electric wire Ws may be insufficient.

This inconvenience is solved by replacing the housing 73 with a housing 95 having an electric wire support projection 97 and an electric wire receiving groove 99 corresponding to the outer diameter of the covered electric wire Ws, as shown in FIG. However, in this case, the housings 73 and 95 having different shapes depending on the outer diameter of the covered electric wire W are required, which leads to an increase in the number of parts.

The present invention has been made in view of the above problems, and it is possible to reliably maintain an electrically connected state by using the same housing even for coated electric wires having different outer diameters. It is an object of the present invention to provide an electric wire pressure contact connector that can be used.

[0012]

In order to solve the above-mentioned problems, the invention according to claim 1 relates to a press-connecting connector for press-connecting a covered electric wire to a slot of a press-connecting terminal provided in a resin housing. The press contact terminal has a terminal board portion fixed to a terminal mounting portion of the housing, the slot is formed on a side wall portion erected from the terminal board portion, and at least the slot is formed on the terminal board portion. An electric wire caulking portion for caulking and connecting the covered electric wire is provided on one side.

According to the first aspect of the present invention, when a large-diameter coated electric wire is pressure-contacted and connected, first, the coated electric wire is housed in the housing so as to be positioned on the slot, and the caulking jig is press-contacted. Press from above. When the jig is pressed, the covered wire is inserted from the tip of the slot to cut off the covered part, the core wire part is electrically connected to the pressure contact terminal, and the wire crimping parts are connected on both sides of the slot. To be done. At this time, the covered electric wire is fixed in the housing with a step on both sides of the slot, and the bent portion is formed on the covered electric wire by the step.

When connecting a small-diameter covered electric wire to the press-contact terminal instead of the large-diameter covered electric wire, as in the case of the large-diameter covered electric wire, it is positioned on the covered electric wire slot and the jig is used. Is pressed from above the pressure contact terminal. At this time, the amount of movement of the jig is made larger than that of the large-diameter covered electric wire, the covered electric wire is inserted from between the tips of the slots, and the electric wire crimping portion is crimped. As a result, the small-diameter covered electric wire is fixed in the housing with a step substantially equal to that in the case of the large-diameter covered electric wire on both sides of the slot, and a bent portion similar to the large diameter is formed.

According to a second aspect of the present invention, there is provided the electric wire crimping connector according to the first aspect, wherein the electric wire crimping portion is provided at least at two positions separated from each other on the same side with respect to the slot. Between the electric wire crimping portions, a protruding portion for bending the covered electric wire is provided so as to project.

According to the invention described in claim 2, in addition to the function of the invention described in claim 1, when the covered electric wire is crimped, the covered electric wire is bent by the protrusions between the electric wire crimping portions on the same side. An outer bent portion is further formed outside the bent portion.

According to a third aspect of the present invention, there is provided the electric wire pressure contact connector according to the second aspect, wherein the projecting portion projects from a terminal mounting portion of the housing, and the two portions of the terminal board portion are provided. A hole for inserting the protrusion is formed between the electric wire crimping portions.

According to the invention of claim 3, in addition to the effect of the invention of claim 2, even when a tensile force in the axial direction acts on the coated electric wire, the pressure contact is made by the engagement of the hole and the protrusion. Deformation of the terminal slot is prevented.

A fourth aspect of the present invention is the electric wire pressure contact connector according to the second aspect, wherein the pressure contact terminal is provided integrally with the housing by insert molding, and the protrusion is integrated with the housing. It is characterized in that it is formed in a desired manner.

According to the invention described in claim 4, in addition to the function of the invention described in claim 2, an outer bent portion due to a projection is formed on the covered electric wire by a simple structure such as insert molding, and the deformation of the slot. Is blocked.

Further, since the protrusion is provided integrally with the housing, the protrusion can be formed in a desired shape such that the covered electric wire is unlikely to be displaced by the tensile force.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view showing a press contact connector 1 according to a first embodiment, FIG. 2 is a side sectional view of the press contact connector 1 of FIG. 1, and FIG. 4A is a side cross-sectional view showing the state of temporarily holding the covered electric wire W, and FIG. 6B shows a state in which the caulking pieces 31 and 33 are caulked.

As shown in FIG. 1, a wire pressure welding connector 1
Is a box-shaped resin housing 3 with an open upper surface
And a pressure contact terminal 5 housed in the housing 3, and a plate-shaped cover 7 that closes the upper surface of the housing 3.

A plurality of wire insertion grooves 9 through which the covered wires W are inserted are provided in parallel on the side walls 3a facing each other along the width direction of the housing 3. The wire insertion groove 9 has an open upper end, and locking projections 11 are provided on both sides of the upper end of the wire insertion groove 9 to prevent the inserted covered wire W from coming off.
At least one of the locking projections 11 of each wire insertion groove 9 is provided on the flexible arm 13 so that the covered wire W can be accommodated from above, and the upper part of the locking projection 11 is provided with the wire insertion groove 9 inside. An inclined surface 11a that guides the covered electric wire W is formed on the.

Engagement recesses 15 are formed on the inner surfaces of the side walls 3b which face each other along the longitudinal direction of the housing 3, and the side faces of the cover 7 corresponding thereto are engaged with the engagement recesses to cover the cover 7 with each other. A lock protrusion 17 for fixing to the upper surface of the housing 3 is provided in a protruding manner.

The press-connecting terminal 5 is formed by punching a metal plate into a predetermined shape and then bending it into a substantially hat-shaped cross section. The press-connecting terminal 5 extends upward and extends on both sides of the wire connecting portion 21. And a terminal board portion 23.

On the side wall portion 21a of the electric wire connecting portion 21 which is erected from the terminal board portion 23, the electric wire guide portion 25 which is cut into a V shape along with the upper surface and opens upward, and the V-shaped tip of the electric wire guide portion 25. And a U-shaped slot 27 that extends downwardly to form a press contact blade. A plurality of the wire guide portions 25 and the slots 27 are arranged in parallel so as to correspond to the wire insertion grooves 9 of the housing 3. Covered wire W on each wire guide 25
Is placed and the covered electric wire W is pressed from above, the covering portion 41 of the covered electric wire W is cut off by the slot 27, the core wire portion 43 is inserted between the slots 27, and the covered electric wire W and the press contact terminal 5 are electrically connected. To do.

The terminal board portion 23 of the press contact terminal 5 has a plate-like board extending portion 2 extending individually corresponding to each slot 27.
9 and a pair of crimping pieces 31, 33 as electric wire crimping portions bent upward from both sides of each board extending portion 29 and projecting upward.
Are provided. On the same side with respect to the slot 27, the pair of caulking pieces 31 and 33 are provided so as to be spaced apart from each other so as to be different in distance from the electric wire connecting portion 21. The covered electric wire W is arranged on the board extending portion 29,
When the caulking pieces 31 and 33 are pressed from above and caulking, the caulking pieces 31 and 33 are plastically deformed and the covered portion 4 of the covered electric wire W is covered.
1 The outer periphery is tightened, and the covered electric wire W is fixed to the pressure contact terminal 5.

The press-contact terminal 5 is housed in the housing 3 in a state where the tips of the respective board extending portions 29 face the electric wire insertion grooves 9, respectively, and is fixed on the bottom plate 3c of the housing 3 as a terminal mounting portion. Although the pressure contact terminal 5 is not particularly shown, a terminal lock protrusion is provided on the housing 3 so that the board extension portion is engaged with the terminal lock protrusion, or the length of the pressure contact terminal 5 is set to a distance between the side walls 3 a of the housing 3. It is fixed by a method such as forming it slightly larger than that and press-fitting the press contact terminal 5. Further, the pressure contact terminal 5 can be integrally provided with the housing 3 by so-called insert molding in which the housing 3 is injection-molded while the pressure contact terminal 5 is housed in the molding die.

Next, the operation will be described.

When arranging the covered electric wire W, first, referring to FIG.
As shown in (a), the covered electric wire W is accommodated in the electric wire insertion groove 9 of the housing 3 from above, and the electric wire guide portion 2 of the press contact terminal 5 is accommodated.
A temporary holding state is set on the sheet 5, and predetermined wiring is performed in this state.

After completion of the predetermined wiring, as shown in FIG. 3B, the caulking jig 45 is pressed from above the press contact terminal 5. On the lower surface of the jig 45, an electric wire contact portion 47 that contacts the covered electric wire W, crimping piece contact portions 49 and 51 that contacts the crimping pieces 31 and 33, and an upper end surface of the wire connecting portion 21. A recess 45a is formed to avoid contact. Jig 45
When is pressed, the covered electric wire W is inserted from between the tips of the slots 27, the covered portion 41 is cut off, and the core wire portion 43 (see FIG.
Is electrically connected to the press contact terminal 5 and is crimped and connected by crimping pieces 31 and 33 on both sides of the wire connecting portion 21. At this time, the covered electric wire W is fixed in the housing 3 with a step H0 on both sides of the electric wire connecting portion 21, as shown in FIG. That is, the covered electric wire W includes the bending portion 5 in the housing 3 due to the step H0.
3 is formed.

After pressing the press contact terminal 5 by the jig 45, the cover 7 is attached and the upper surface of the housing 3 is closed.

According to the wire pressure welding connector 1, even if the tensile force in the axial direction acts on the covered wire W, the caulking piece 31,
Since the crimping force by 33 and the refraction portion 53 by the step H0 can sufficiently absorb the load,
It is possible to reliably maintain the electrical connection state between the covered electric wire W and the press contact terminal 5.

Further, as shown by the chain double-dashed line in FIG. 2, in the case of connecting a small diameter covered electric wire Ws to the pressure contact terminal 5 instead of the large diameter covered electric wire W, the large diameter covered electric wire W Similarly to the case, after the covered electric wire Ws is temporarily held and the predetermined wiring is performed, the jig 45 is pressed from above the press contact terminal 5 (FIG. 3).
(B)). At this time, the amount of movement of the jig 45 is increased so that the crimping height is smaller than that when the crimping height is large, the coated electric wire Ws is inserted from between the tips of the slots 27, and the crimping pieces 31 and 33 are crimped. Tighten. Thereby, the covered electric wire Ws has the large diameter covered electric wire W on both sides of the electric wire connecting portion 21.
It is fixed in the housing 3 with a step h0 substantially equal to the step H0, that is, in a state in which a bent portion 53 having a large diameter is formed.

Therefore, even if the covered electric wire Ws has a small diameter,
By adjusting the movement amount (crimping height) of the jig 45, it is possible to use the same housing 3 to obtain the same pressure contact connection state as that of the thick coated electric wire W. Regardless of the difference, it is possible to reliably maintain the electrically connected state between the covered electric wires W and Ws and the press contact terminal 5.

Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 4 is an exploded perspective view showing the press contact connector 55 according to the second embodiment, and FIG. 5 is a side sectional view of the press contact connector 55 of FIG. 4, showing the same parts as those of the first embodiment. Are assigned the same reference numerals and explanations thereof are omitted.

As shown in FIG. 4, this press-connecting connector 55
In addition to the pressure contact connector 1 according to the first embodiment, a hole 57 is formed in each board extension 29 of the pressure contact terminal 5, and a protrusion that is inserted into the hole 57 in the bottom plate 3c of the housing 3. 59 is provided in a protruding manner.

The hole 57 is provided between the caulking pieces 31 and 33 which are spaced apart from each other, and the projection 59 projects between the caulking pieces 31 and 33 on the substrate extending portion 29 while the hole 57 is inserted. .

According to the second embodiment, as shown in FIG. 5, when the covered electric wire W is caulked, the covered electric wire W is bent by the protrusion 59 between the caulking pieces 31 and 33 on the same side. The outer bent portion 61 is further formed outside the bent portion 53. Therefore, in addition to the effect of the first embodiment, the load acting on the covered electric wire W can be absorbed by the outer bent portion 61 as well, and the electric connection state between the covered electric wire W and the pressure contact terminal 5 can be maintained. It can be maintained more reliably.

Even when a tensile force acts on the covered electric wire W in the axial direction, the electric wire connecting portion 21 (slot 27) of the press contact terminal 5 expands and deforms due to the engagement of the hole 57 and the protrusion 59. Can be prevented, and the electrical connection state in the slot 27 can be maintained more reliably.

Next, a third embodiment of the present invention will be described with reference to the drawings.

FIG. 6 is an exploded perspective view showing a press-connecting connector 55 according to the third embodiment, and FIG. 7 is a side sectional view of the press-connecting connector 55 of FIG. 6, the first embodiment or the second embodiment. The same parts as those in Embodiment 1 are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIGS. 6 and 7, in this press-connecting connector 63, the press-connecting terminal 5 is integrally provided in the housing 3 by insert molding, and the crimping pieces 31, 33 are formed similarly to the second embodiment. The protrusion 65 located between them is integrally provided on the bottom plate 3c of the housing 3. The press contact terminal 5 is embedded in the bottom plate 3c of the housing 3 and is not exposed, and only the caulking pieces 31 and 33 project onto the bottom plate 3c.

According to the third embodiment, unlike the second embodiment, the projection 65 is formed on the covered electric wire W by a simple structure of insert molding without forming the hole 57 in the press contact terminal 5. The outer bent portion 61 can be formed, and the wire connecting portion 21 (slot 27) can be prevented from expanding and deforming.

FIG. 8 shows a modification of the third embodiment. FIG. 8 (a) is a sectional view of a main portion in which the protrusion 65 shown in FIG. 8] is a main-portion cross-sectional view of a protrusion 69 having an upper surface saw blade shape. That is, the protrusion 67,
Since 69 is integrally provided on the bottom plate 3c of the housing 3, the protrusions 67 and 69 can be formed in a desired shape such that the covered electric wire W is unlikely to be displaced by a tensile force, and the covered electric wire W and the pressure contact terminal 5 are provided. It is possible to more reliably maintain the electrical connection state with.

The projection 59 of the second embodiment can also be formed into a desired shape as in FIG. 8 by integrally providing it with the bottom plate 3c of the housing 3.

[0050]

As described above, according to the first aspect of the invention, the movement amount (crimping height) when pressing the jig in accordance with the outer diameter of the covered electric wire is set. If adjusted, even coated wires with different outer diameters are press-fitted and connected in the slots, and are fixed in a state in which the wire crimping parts are crimped and connected on both sides of the slot to form the bent part due to the step. It As a result, even if an axial tensile force is applied to the covered electric wire, the load can be sufficiently absorbed by the caulking force of the electric wire crimping portion and the bending portion due to the step, so that a covered electric wire having a different outer diameter can be used. Even if there is, the same housing can be used to reliably maintain the electrical connection between the covered electric wire and the press contact terminal.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, since the outer bent portion is further formed on the outer side of the bent portion in the covered electric wire, the outer bent portion also causes the outer bent portion. The load acting on the covered electric wire can be absorbed, and the electrical connection state between the covered electric wire and the press contact terminal can be more surely maintained.

According to the invention of claim 3, in addition to the effect of the invention of claim 2, even when a tensile force in the axial direction acts on the coated electric wire, the hole and the projection are engaged with each other. It is possible to prevent deformation of the press contact terminal slot,
The electrical connection state in the slot can be maintained more reliably.

According to the invention described in claim 4, in addition to the effect of the invention described in claim 2, the outer bent portion by the protrusion can be formed in the covered electric wire by the simple structure of insert molding, and It is possible to prevent the electric wire connecting portion from being deformed, and it is possible to more reliably maintain the electrically connected state in the slot.

Further, since the projection is integrally provided in the housing, the projection can be formed in a desired shape such that the covered electric wire is unlikely to be displaced by the tensile force, and the electric connection between the covered electric wire and the pressure contact terminal can be achieved. The connected state can be maintained more reliably.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a press-connecting connector according to a first embodiment.

FIG. 2 is a side sectional view of the press-connecting connector of FIG.

FIG. 3 is a side sectional view for explaining the action of the press-connecting connector of FIG. 1, (a) showing a temporary holding state of the covered electric wire, and (b).
Indicates the state when the crimping piece is crimped.

FIG. 4 is an exploded perspective view showing a press-connecting connector according to a second embodiment.

5 is a side sectional view of the press-connecting connector of FIG.

FIG. 6 is an exploded perspective view showing a press-connecting connector according to a third embodiment.

FIG. 7 is a side sectional view of the press-connecting connector of FIG.

FIG. 8 shows a modification of the third embodiment,
FIG. 8A is a main-portion cross-sectional view in which the protrusion shown in FIG. 7 is a protrusion having a triangular side cross-section, and FIG.

FIG. 9 is a side sectional view of a conventional example.

FIG. 10 is a perspective view of a main part of a conventional example.

FIG. 11 is a side sectional view showing a problem of the conventional example.

FIG. 12 is a side sectional view showing a problem of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pressure contact connector 3 Housing 3c Housing bottom plate (terminal mounting part) 5 Pressure contact terminal 21a Side wall part 23 Terminal board part 27 Slot 31 Caulking piece (electric wire caulking part) 33 Caulking piece (electric wire caulking part) 55 Pressure contact connector 57 Hole 59 Projection 63 Pressure welding connector 65 Projection 67 Projection 69 Projection W W covered electric wire (large diameter) Ws Coated electric wire (small diameter)

Claims (4)

[Claims] 1. A press-connecting connector for press-connecting a coated electric wire to a slot of a press-connecting terminal provided in a resin housing, wherein the press-connecting terminal has a terminal board portion fixed to a terminal mounting portion of the housing, The slot is formed on a side wall portion provided upright from the terminal board portion, and the terminal board portion is provided with a wire crimping portion for crimping and connecting the covered electric wire on at least one side of the slot. Wire pressure welding connector to be. 2. The electric wire crimping connector according to claim 1, wherein the electric wire crimping portion is provided at at least two locations spaced apart on the same side with respect to the slot, and between the two electric wire crimping portions. A wire crimping connector, characterized in that a protruding portion for bending the covered electric wire is provided. 3. The electric wire press-connecting connector according to claim 2, wherein the protrusion is provided so as to protrude from a terminal mounting portion of the housing, and between the two wire crimping portions of the terminal board portion. An electric wire crimping connector, characterized in that a hole is formed through which the protrusion is inserted. 4. The electric wire pressure contact connector according to claim 2, wherein the pressure contact terminal is integrally provided in the housing by insert molding, and the protrusion is integrally formed in the housing. Wire pressure welding connector to be.