JP2005143194A - Wire lead-out structure of resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To waterproof a joint connector or a relay block arranged in a submerged region, and to prevent a wire being led out from the joint connector or the relay block from coming off by making possible to secure the wire easily to a wire lead-out part. <P>SOLUTION: A convenient waterproof case 10 being mounted in the engine room of an automobile consists of a case 11 provided with a first wire guide piece 15 and a cover 13 provided with a second wire guide piece 18. A wire lead-out opening 17 is formed under a state where the lower section of the case 11 is closed by the cover 13, and the first and second wire guide pieces 15 and 18 are combined to form a wire inserting tubular section 50 continuous to the wire lead-out opening 17. A planar securing piece part 51 projecting from any one of the first and second wire guide pieces 15 and 18 is provided continuously to the forward end of the wire inserting tubular section 50 and a wire group is secured to the securing piece part 51 by taping. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a resin lead-out structure for a resin molded product, and more particularly, to achieve simple waterproofing at a wire lead-out port of a resin-molded product such as an electric connection box mounted in a water-resistant region in an automobile engine room.

Conventionally, an electric connection box is provided with an electric wire extraction portion for extracting an electric wire group.
For example, in Japanese Patent Application Laid-Open No. 7-203616, the applicant of the present application has a semi-annular shape from the main body 2 and the lower cover 3 of the electrical connection box 1 in order to draw out the electric wire w from the electrical connection box 1, respectively. The cylindrical portions 2a and 3a are protruded, the cylindrical portions 2a and 3a are matched to form a cylindrical wire lead-out portion 4, and the wire w is inserted into the wire lead-out portion 4 and pulled out to the outside.

  In some cases, a flat tongue piece is provided in place of the cylindrical wire lead-out portion as described above, and an electric wire is taped and fixed to the tongue piece.

When the cylindrical wire lead-out portion 4 is used, since the wire lead-out portion 4 and the wire group are not fixed, when a tensile force is applied to the wire group from the outside, a connector connected to the end of the wire group A load may be applied to the connector connection portion on the electrical connection box side, and the fitting may be disengaged. Further, if there is a gap between the inner peripheral surface of the wire lead-out portion and the outer peripheral surface of the electric wire group, it becomes a flooded path, preventing water from entering the electrical junction box, and cannot be mounted in the flooded area.
Similarly, in the case of an electric wire drawing portion formed of a flat plate-like tongue piece, when an electric connection box or the like provided with the electric wire drawing portion is arranged in a wet area, water is introduced from the electric wire outlet provided at the base of the electric wire drawing portion. There are problems that are likely to occur.
JP-A-7-203616

  The present invention has been made in view of the above problems, and is intended to simplify waterproofing of a resin molded product such as an electrical connection box disposed in a water-resistant region such as an engine room, and to draw out an electric wire drawn from the resin molded product. The problem is to make it easy to fix to the head.

In order to solve the above-mentioned problem, the present invention is a wire drawing structure of a simple waterproof type resin molded product mounted in an engine room of an automobile,
The resin molded product consists of a case with a first wire guide piece and a cover with a second wire guide piece,
In the state where the lower part of the case is closed with the cover, an electric wire outlet is formed between the cover and the case, and the first and second electric wire guide pieces are combined and connected to the electric wire outlet. An insertion tube portion is formed, a wire group is inserted into the wire insertion tube portion, and further, a plate shape protruding from either the first or second wire guide piece continuously to the tip of the wire insertion tube portion A resin-drawn wire lead-out structure is provided, in which a fixed piece portion is provided, and the wire group is wound around and fixed to the fixed piece portion.

With the above configuration, the first wire guide piece and the second wire guide piece form the wire insertion tube portion on the base side, and the wire outlet is not exposed to the outside. It is possible to make it difficult for water to enter. Moreover, since the plate-shaped fixed piece part is formed in the front end side of an electric wire penetration cylinder part, an electric wire can be fixed to this fixed piece part by tape winding, and the disconnection of the electric wire by tensile force can be prevented.
In addition, since the fixing piece part is plate-shaped, the contact area between the electric wire on the fixing piece part and the tape wound around the fixing piece part can be increased, and the fixing strength of the electric wire can be increased.
Moreover, since the direction of the electric wire pulled out by the electric wire insertion cylinder part is regulated, the tape winding work around the fixed piece part of the electric wire can be facilitated.
Moreover, waterproofness can be improved if it sets to the dimension made to closely fit together with the outer diameter of the electric wire group which penetrates the internal diameter of an electric wire penetration cylinder part.

  Specifically, the case includes a box-shaped case body portion having a lower end opening for receiving and housing a joint connector connected to the wire terminal, and the first wire guide protruding downward from the lower end of the case body portion. On the other hand, the cover includes a lid portion that closes the lower end opening of the case, and the second electric wire guide piece that protrudes downward from the tip of the lid portion, and the wire outlet on the lid portion. It has a notch.

If it is set as the said structure, since the waterproof case which consists of a resin molded product is covered on the joint connector, a joint connector can be arrange | positioned in the optimal location also in a wet region.
In addition, since the case is placed vertically with the cover on the bottom, even if water enters through the gap between the case and the cover, it can be drained through the wire insertion tube, and the terminal portion of the joint connector can be submerged. Can be prevented.

  Further, the case is composed of a main body case of the relay block, and a group of electric wires connected to the relay block is drawn out from the electric wire outlet and passes through the electric wire insertion cylinder portion which becomes the simple waterproof portion, and is taped to the fixing plate portion. It is good also as a structure fixed by winding.

  With the above configuration, the wire insertion tube portion formed by combining the first wire guide piece and the second wire guide piece can prevent water from being drawn from the wire outlet, and the wire drawn from the main body case of the relay block Can be firmly fixed to the fixed piece by tape winding to prevent the wire from coming off.

  As is clear from the above description, according to the present invention, the wire insertion tube portion is formed on the base side by the first wire guide piece and the second wire guide piece, and the wire outlet is not exposed to the outside. Further, it is possible to make it difficult for water to enter into a resin molded product such as an electric junction box. Moreover, since the plate-shaped fixed piece part is formed in the front end side of an electric wire penetration cylinder part, an electric wire can be fixed to this fixed piece part by tape winding, and the disconnection of the electric wire by tensile force can be prevented.

Embodiments of the present invention will be described with reference to the drawings.
1 to 7 show a first embodiment of the present invention.

  As shown in FIGS. 1 and 2, a waterproof case 10 made of a resin molded product is a cover that is attached to one end of an opening end of the case 11 via a thin hinge portion 12 to open and close the opening of the case 11. 13 is integrally formed.

  The case 11 protrudes from a box-shaped case main body 14 having an opening at one end for receiving and inserting the joint connector 20 and a lower right corner in FIG. 1C which is the other end of the opening end of the case main body 14. And a flat plate-shaped first electric wire guide piece 15. At the tip of the first wire guide piece 15, a rib 15a for preventing a tape position deviation protruding downward is provided.

On the other hand, the cover 13 includes a lid portion 16 that closes the opening of the case 11 and a second electric wire guide piece 18 that protrudes from the lid portion 16. A position corresponding to the first electric wire guide piece 15 of the case 11 when the cover 13 is turned to the case 11 side with the thin hinge 12 as a fulcrum, in FIG. A notch is provided with a wire outlet 17, and a second wire guide piece 18 having a concave cross section is protruded in the opposite direction to the first wire guide piece 15 from the edge where the wire outlet 17 is provided. The second wire guide piece 18 is shorter than the first wire guide piece 15 and is approximately half the length of the first wire guide piece 15.
Further, on the outer surface of the case main body portion 14, a cassette lock (lock portion) 101 and a lock claw 102 are provided at required locations, and a lock portion 103 that is locked to the lock claw 102 is provided on the lid portion 16.

As shown in FIGS. 3 and 4, the male connector 21 of the joint connector 20 is formed by integrally forming a male connector main body portion 22 and a lid portion 23 via a thin hinge portion 24.
The male connector main body 22 has a box shape with an opening at one end, a plurality of terminal holes 22b are provided in the bottom wall 22a, and tabs 32 of the joint bus bar 30 are respectively inserted into the terminal holes 22b and protrude into the male connector main body 22. I am letting. As shown in FIG. 4C, the joint bus bar 30 has a plurality of tabs 32 protruding from the upper and lower sides of the belt-like connecting portion 31 at the same pitch and in the same direction.

A rib 23a is provided at a required portion of the lid 23, and the lid 23 is rotated to the male connector main body 22 side with the thin hinge 24 as a fulcrum to lock the male connector main body 22 and the lid 23. When combined, the lid 23 covers the bottom wall 22a of the male connector main body 22 as shown in FIG. At this time, the band-shaped connecting portion 31 of the joint bus bar 30 attached to the male connector main body portion 22 is pressed by the rib 23a of the lid portion 23, and the joint bus bar 30 is positioned and fixed.
In addition, the joint bus bar 30 is not limited to that shown in FIG. 4C, and may be divided into a plurality of parts by cutting the band-shaped connecting portion 31.

  The female connector 25 of the joint connector 20 includes a plurality of terminal accommodating chambers 26 as shown in FIG. The terminal accommodating chamber 26 has an opening 26a for inserting a female terminal 40 having one side connected to a wire terminal, and a terminal hole 28 for inserting a tab 32 of the joint bus bar 30 is formed in the bottom wall 27 on the other side. The terminal holes 28 are in communication with the terminal accommodating chambers 26, respectively. In the terminal accommodating chamber 26, female terminals 40 that are crimp-connected to the ends of the electric wires w that serve as ground wires are inserted and locked.

  When the male connector 21 and the female connector 25 are fitted, the tab 32 of the joint bus bar 30 protruding into the male connector 21 is inserted into the terminal hole 28 of the female connector 25 and connected to the female terminal 40, and the electric wire w is jointed. .

  As described above, the joint connector 20 in which the male connector 21 and the female connector 25 are fitted is housed in the case body 14 of the waterproof case 10 as shown in FIG. With the electric wire w pulled out from the joint connector 20 being along the first electric wire guide piece 15 of the case 11, as shown in FIG. 6B, the cover 13 is turned to the case 11 side with the thin hinge portion 12 as a fulcrum. The lock claw 102 of the case 11 is engaged with the lock portion 103 of the cover 13. At this time, the opening of the case main body portion 14 is closed by the lid portion 16 of the cover 13, and the cylindrical wire insertion tube that becomes a simple waterproof portion on the base side by the first wire guide piece 15 and the second wire guide piece 18. A portion 50 is formed, and a flat plate-like fixed piece 51 is formed so as to protrude from the tip of the wire insertion tube portion 50. The wire w is pulled out of the waterproof case 10 through the wire outlet 17 of the lid portion 16 and the inside of the wire insertion tube portion 50, and in this state, the tape T is wound around the wire insertion tube portion 50 as shown in FIG. At the same time, the electric wire w is fixed to the fixed piece 51 by winding the tape T together with the electric wire w arranged in parallel with the fixed piece 51 on the tip side.

  As shown in FIG. 8, the waterproof case 10 in which the joint connector 20 is accommodated is placed in the vertical direction in which the case 11 is upward and the cover 13 is downward as shown in FIG. It is locked and fixed to a locked part (not shown) provided at a required position of P.

If it is set as the above-mentioned composition, since the cylindrical electric wire penetration cylinder part 50 is provided in the waterproof case 10 of the joint connector 20, and the tape T is wound around the outer surface of this electric wire penetration cylinder part 50, the flooding to the waterproof case 10 is prevented. be able to. In addition, since a flat plate-like fixed piece portion 51 is provided at the tip of the wire insertion tube portion 50 and the tape T is wound around the fixed piece portion 51 together with the electric wire w, the electric wire w is firmly fixed to the fixed piece portion 51. It is possible to prevent the joint connector 20 from coming off even if the electric wire w is pulled.
Moreover, since the direction of the electric wire w is regulated by the electric wire insertion tube portion 50, there is an advantage that the electric wire w can be easily wound on the fixed piece 51.

In addition, since the cassette lock 101 is provided in the waterproof case 10, the joint connector 20 can be easily fixed at the required location by locking the cassette lock 101 to the locked portion provided at the required location of the panel P. Can be arranged.
Further, since the waterproof case 10 is arranged in a direction in which the case 11 is upward and the cover 13 is downward, the water is drained through the wire insertion tube portion 50 even if water enters from the gap between the case 11 and the cover 13. It is possible to prevent the terminal portion of the joint connector 20 from being submerged.
In addition, you may provide a flat fixed piece part in the 2nd electric wire guide piece side.

  9 to 12 show a second embodiment of the present invention. The waterproof case 10 'of the present embodiment is different from the first embodiment in the shapes of the first electric wire guide piece 15' and the second electric wire guide piece 18 '. I am letting. That is, the first wire guide piece 15 'has an L-shaped cross section on the base side and a flat plate shape on the distal end side, while the second electric wire guide piece 18' has an L-shaped cross section from the base portion to the distal end. When the second wire guide piece 18 'closes the opening of the case main body portion 14' by the lid portion 16 ', the tip of the second wire guide piece 18' has an L-shaped cross section of the first wire guide piece 15 '. The length matches the tip of the part.

Further, the locking piece 14b ′ protrudes from the closing wall 14a ′ of the case body portion 14 ′, and a locking claw 14c ′ for locking with the locking claw 29 of the female connector 25 is provided at the tip of the locking piece 14b ′.
The joint connector 20 ′ comprises only the female connector 25. The tab 32 of the joint bus bar 30 is inserted directly into the terminal hole 28 of the female connector 25 and connected to the female terminal 40, and the electric wire w is jointed. At this time, the strip-like connecting portion 31 of the joint bus bar 30 is exposed to the outside from the terminal hole 28.

  When the female connector 25 is inserted into the case main body 14 ′ of the waterproof case 10 ′ and locked, the band-shaped connecting portion 31 of the joint bus bar 30 is connected to the inner surface of the closing wall 14 a ′ of the case main body 14 ′ and the bottom of the female connector 25. It is sandwiched and fixed by the outer surface of the wall 27.

  In this state, when the opening of the case main body portion 14 ′ is closed by the lid portion 16 ′, the cylindrical wire shown in FIG. 12 is formed by the L-shaped section of the first wire guide piece 15 ′ and the second wire guide piece 18 ′. An insertion tube portion 50 'is formed, and a flat plate-like fixed piece portion 51' protruding from the tip of the wire insertion tube portion 50 'is formed. Then, the tape T is wound around the electric wire insertion tube portion 50 ', and the electric wire w is fixed to the fixed piece portion 51' by winding the tape T together with the electric wire w around the fixed piece portion 51 'on the distal end side.

If it is the said structure, since the cylindrical electric wire penetration cylinder part 50 'is provided in waterproofing case 10' like 1st Embodiment, while preventing inundation to waterproofing case 10 ', the direction of the electric wire w is controlled. In addition, since the flat fixed piece 51 ′ protrudes from the tip of the wire insertion tube 50 ′, the electric wire w can be firmly fixed to the fixed piece 51 ′.
Moreover, since the joint connector 20 is comprised only by the female connector 25 and the male connector is abbreviate | omitted, a number of parts and work man-hours can be reduced.

In the present embodiment, the female connector is inserted and locked to the case body of the case with the joint bus bar fixed to the female connector of the joint connector. However, the joint bus bar is previously press-fitted or molded into the case body of the case. The joint bus bar may be connected to the female terminal in the female connector by fixing the female connector to the case body and inserting and locking the female connector in the case main body.
In addition, since other configurations and operational effects are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

FIG. 13 shows a third embodiment of the present invention, and a relay block 60 mounted in an engine room of an automobile has a lower cover 63 on the lower surface of a main body case 61.
The main body case 61 includes a flat plate-shaped first electric wire guide piece 62 that protrudes laterally from the lower end of one side surface, and a lower cover 63 that covers the lower surface of the main body case 61 faces the first electric wire guide piece 62. The electric wire outlet 64 is cut out at a position where the electric wire outlet 64 is provided, and a second electric wire guide piece 65 protruding from the periphery of the electric wire outlet 64 in the same direction as the first electric wire guide piece 61 is provided. The second wire guide piece 65 has a concave section on the base side and a flat plate on the tip side. Further, the first wire guide piece 62 has a length such that when the main body case 61 and the lower cover 63 are assembled, the tip of the first wire guide piece 62 and the tip of the cross-sectional concave portion of the second wire guide piece 65 coincide. Yes.

  When the main body case 61 and the lower cover 63 of the relay block 60 are assembled, a cylindrical electric wire insertion cylinder portion 70 is formed by the concave sections of the first electric wire guide piece 62 and the second electric wire guide piece 65, and the electric wire insertion A flat plate-like fixed piece portion 71 protruding from the tip of the cylindrical portion 70 is formed. And in the state which inserted the electric wire (not shown) in the electric wire insertion cylinder part 70, while winding a tape around the electric wire insertion cylinder part 70, the tape is also wound around the fixed piece part 71 of the front end side with an electric wire, and an electric wire is fixed piece. It is fixed to the part 71.

  With the above configuration, the relay block 60 can also be waterproofed by providing the tubular wire insertion tube portion 70, and a flat plate-like fixed piece portion 71 provided on the distal end side of the wire insertion tube portion 70. The wire can be firmly fixed with tape.

  FIG. 14 shows a first modification of the third embodiment. A main body case 61 ′ of the relay block 60 ′ is provided by cutting out a semi-annular wire outlet 66 ′ at the lower end of the side wall. A first electric wire guide piece 62 ′ having a semicircular cross section that protrudes from the periphery of the outlet 66 ′ is provided. On the other hand, the lower cover 63 ′ is provided with a semi-annular wire outlet 64 ′ cut out at a position facing the upper end of the side wall and the wire outlet 66 ′ of the main body case 61 ′. A second wire guide piece 65 ′ protruding from the periphery is provided. The second wire guide piece 65 ′ has a semicircular cross section on the base side and a flat plate on the tip side.

  When the main body case 61 ′ and the lower cover 63 ′ of the relay block 60 ′ are assembled, the first electric wire guide piece 62 ′ and the second electric wire guide piece 65 ′ having a semicircular cross section have an annular shape. Is formed, and a flat plate-like fixed piece portion 71 ′ protruding from the tip of the wire insertion tube portion 70 ′ is formed. The inner diameter of the wire insertion tube portion 70 ′ is set to a size that allows a tight fit together with the outer diameter of the wire group to be inserted. In a state where an electric wire (not shown) is inserted into the electric wire insertion cylinder portion 70 ′, a tape is wound around the electric wire insertion cylinder portion 70 ′, and the tape is also wound around the distal end side fixed piece 71 ′ together with the electric wire. It is fixed to the fixed piece 71 '.

If it is set as the said structure, since the electric wire group penetrated by electric wire insertion cylinder part 70 'is made to closely fit in electric wire insertion cylinder part 70', the waterproofness in electric wire insertion cylinder part 70 'can be improved.
Moreover, in this embodiment, although the internal diameter of electric wire penetration cylinder part 70 'and the width | variety of fixed piece part 71' are made equivalent, when the width of fixed piece part 71 'is made larger than the internal diameter of electric wire insertion cylinder part 70'. The electric wires w can be arranged in parallel on the fixed piece 71 ′ and firmly fixed by tape winding.
In addition, since another structure and an effect are the same as that of 3rd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 15A shows a second modification of the third embodiment. A main body case 61 ″ of the relay block 60 ″ is provided with a semicircular wire outlet 66 ″ cut out at the lower end of the side wall. The first wire guide piece 62 "having a semicircular cross section projecting from the periphery of the wire outlet 66" is provided. On the other hand, the lower cover 63 "is not provided with the wire outlet, and the upper end of the side wall and the body case 61 are provided. The second electric wire guide piece 65 "protrudes from a position opposite to the electric wire outlet 66". The second electric wire guide piece 65 "has a flat plate shape from the base to the tip.

  When the main body case 61 "and the lower cover 63" of the relay block 60 "are assembled, the semicircular electric wire insertion is made by the base side of the first electric wire guide piece 62" and the second electric wire guide piece 65 "having a semicircular cross section. A cylindrical portion 70 ″ is formed, and a flat plate-like fixed piece portion 71 ″ protruding from the tip of the wire insertion cylindrical portion 70 ″ is formed. In a state where an electric wire (not shown) is inserted through the electric wire insertion cylinder portion 70 ″, a tape is wound around the electric wire insertion cylinder portion 70 ″, and a tape is also wound around the fixing piece 71 ″ at the distal end side to fix the electric wire. It is fixed to one piece 71 ″.

As shown in FIG. 15B, the lower end 62a ″ of the first electric wire guide piece 62 ″ of the main body case 61 ″ extends to the lower cover 63 ″ side, and the lower cover 63 is formed by the first electric wire guide piece 62 ″. You may make it cover the both sides of the 2nd electric wire guide piece 65 protruded from "".
In addition, since another structure and an effect are the same as that of 3rd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

The waterproof case of 1st Embodiment of this invention is shown, (A) is a front view, (B) is a left view, (C) is a right view. A waterproof case is shown, (A) is I1-I1 sectional view taken on the line, (B) is I2-I2 sectional view. The male connector of a joint connector is shown, (A) is I3-I3 sectional view, (B) is a left view, (C) is a right view. The male connector after joint bus-bar mounting | wearing is shown, (A) is I4-I4 sectional view, (B) is a left view, (C) is a right view. The female connector of a joint connector is shown, (A) is a right view, (B) is I5-I5 sectional view taken on the line. (A) is sectional drawing which shows the method of accommodating a joint connector in a waterproof case, (B) is sectional drawing which shows the state which accommodated the joint connector in the waterproof case. The waterproof case which accommodated the joint connector is shown, (A) is a front view, (B) is an I6-I6 line sectional view, (C) is an I7-I7 line sectional view. It is drawing which shows the state which attached the waterproof case to the vehicle body panel. The waterproof case of 2nd Embodiment of this invention is shown, (A) is a front view, (B) is a left view, (C) is a right view. A waterproof case is shown, (A) is I8-I8 sectional view taken on the line, (B) is I9-I9 sectional view taken on the line. (A) is sectional drawing which shows the method of accommodating a joint connector in a waterproof case, (B) is sectional drawing which shows the state which accommodated the joint connector in the waterproof case. It is sectional drawing of an electric wire penetration cylinder part. It is a perspective view of the relay block of 3rd Embodiment of this invention. It is drawing which shows the 1st modification of 3rd Embodiment. (A) (B) is drawing which shows the 2nd modification of 3rd Embodiment of this invention. It is drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Waterproof case 11 Case 12 Thin hinge part 13 Cover 14 Case main-body part 15 1st electric wire guide piece 16 Lid part 17 Electric wire outlet 18 Second electric wire guide piece 20 Joint connector 21 Male connector 25 Female connector 30 Joint bus bar 31 Band-shaped connection part 32 Tab 40 Female terminal 50 Wire insertion tube portion 51 Fixed piece portion 60 Relay block 61 Main body case 62 First electric wire guide piece 63 Lower cover 64 Electric wire outlet 65 Second electric wire guide piece 70 Electric wire insertion tube portion 71 Fixed piece portion P Body panel w Electric wire

Claims (1)

It is a simple waterproof type resin-molded wire drawing structure installed in the engine room of an automobile,
The resin molded product consists of a case with a first wire guide piece and a cover with a second wire guide piece,
In the state where the lower part of the case is closed with the cover, an electric wire outlet is formed between the cover and the case, and the first and second electric wire guide pieces are combined and connected to the electric wire outlet. An insertion tube portion is formed, a wire group is inserted into the wire insertion tube portion, and further, a plate shape protruding from either the first or second wire guide piece continuously to the tip of the wire insertion tube portion An electric wire drawing structure for a resin molded product, characterized in that a fixed piece portion is provided and the wire group is wound around and fixed to the fixed piece portion.

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