JP2013122900A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an electric wire cover from receiving an adverse effect due to interference of a tool.SOLUTION: A connector 10 includes: an electric wire cover 30; a bolt 17; a cylindrical part 34; and an interference part 39. The electric wire cover 30 covers an electric wire lead-out surface 12 of a first housing 11 (housing). The bolt 17 attaches the first housing 11 to a second housing 23 (mating member) by beng subjected to screwing operation from an outer surface side of the electric wire cover 30 by a tool 21. The cylindrical part 34 is configured to permit insertion of the tool 21 by denting an outer wall surface of the electric wire cover 30 and has an engaging part 19 in the bolt 17 with respect to the tool 21 disposed on a bottom 38 thereof. The interference part 39 is formed in the cylindrical part 34 and allows the tool 21 to interfere with the electric wire cover 30 only when an angle formed by an axis 17A of the bolt 17 and an axis 21A of the tool 21 that intersect each other with the engaging part 19 as a substantially fulcrum exceeds a range in which the tool 21 is engageable with the engaging part 19 so as to permit screwing of the bolt 17, and the engaging part 19 and the tool 21 form an angle at which they cannot engage with each other.

Description

  The present invention relates to a connector.

  In Patent Document 1, a housing in which an electric wire is led out from an electric wire lead-out surface, an electric wire cover attached to the housing so as to cover the electric wire lead-out surface, and a housing fitted by being screwed with a tool are fitted. A connector having a bolt assembled to a mating partner is disclosed. The bolt is accommodated inside the electric wire cover so as to be positioned in the vicinity of the electric wire outlet surface, and the electric wire cover is formed with an insertion port for inserting a tool into the electric wire cover. When screwing the bolt, the tool inserted into the wire cover from the insertion port is fitted to the bolt and rotated.

JP-A-5-290924

The electric wire cover has an opening / closing door formed in the insertion opening, and when the tool is inserted into the insertion opening, the opening / closing door is pushed open with the tool. Therefore, the tool always contacts the open / close door while the bolt is screwed. The tool should be fitted coaxially with the bolt, but if the tool axis is inclined with respect to the bolt axis and the angle of inclination is not large, the tool will be fitted with the bolt. Therefore, it is possible to screw a bolt. When the bolt is screwed in while the tool is inclined, the tool turns on a constant path around the axis of the bolt. When such a turning motion occurs, the tool excessively presses the door, and there is a concern that the door or the part of the wire cover that supports the door will be illegally deformed or damaged. The
The present invention has been completed based on the above situation, and an object of the present invention is to prevent the electric wire cover from being adversely affected by tool interference.

  As means for achieving the above object, the invention of claim 1 includes a housing in which an electric wire is led out from an electric wire lead-out surface, an electric wire cover attached to the housing and covering the electric wire lead-out surface, It is a form that allows the insertion of the tool by recessing the outer wall surface of the electric wire cover, and a bolt for assembling the housing to the mating member by being screwed with a tool from the outer surface side. An angle formed between an axis of the bolt and an axis of the tool that is formed in the cylindrical portion and intersects with the fitting portion as a substantial fulcrum, and a cylindrical portion in which the fitting portion with the tool is disposed. Only when the fitting part and the tool are at an angle at which the tool cannot be fitted beyond a range in which the tool can be fitted into the joint part so that the bolt can be screwed in, the tool is attached to the wire cover. Characterized in place and a interference unit for.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the cylindrical portion has a tapered shape in which the diameter dimension becomes smaller as it is closer to the wire lead-out surface.

  According to a third aspect of the present invention, in the second aspect, the inner peripheral surface of the cylindrical portion is an inclined surface that is reduced in diameter as it approaches the wire lead-out surface, and the inner diameter of the inclined portion is reduced most in the inclined surface. It has a feature in that it has a sub-inclined surface that expands from the inner bottom portion to the opening edge facing the wire lead-out surface.

  According to a fourth aspect of the present invention, in the housing according to the third aspect, a through hole through which the bolt penetrates is formed in the housing, and the through hole is formed inside a mounting cylinder portion protruding from the electric wire lead-out surface. The fitting portion can be held against the opening end of the mounting cylinder portion when screwing is completed, and the outer peripheral surface of the mounting cylinder portion and the sub-inclined surface of the cylindrical portion are in the radial direction. It is characterized in that it is disposed opposite to each other with a gap in between.

<Invention of Claim 1>
If the angle between the axis of the tool and the axis of the bolt increases and the tool interferes with the interference part of the wire cover, the tool will not be able to screw out the bolt from the fitting part, so the tool will be centered on the axis of the bolt. As it does not turn in a constant orbit. Therefore, even if the tool comes into contact with the interference part, the pressing action from the tool to the electric wire cover including the interference part is slight, and the electric wire cover is not likely to be adversely affected by the interference of the tool. If the tool is not tilted with respect to the axis of the bolt and the tool cannot be removed from the fitting part, the tool turns on a fixed path as the bolt is screwed in, but the tool contacts the interference part. Not done. Therefore, in this case as well, there is no possibility that the wire cover is adversely affected by the interference of the tool.

<Invention of Claim 2>
When assembling the electric wire cover to the housing, the tapered taper-shaped tubular portion scrapes the multiple electric wires led out from the electric wire outlet surface, so that the electric wire is between the cylindrical portion and the electric wire outlet surface. There is no risk of biting.

<Invention of Claim 3>
Since the cylindrical portion has an inclined surface, a large work space for operating the tool can be secured. Moreover, since the cylindrical part has a sub-inclined surface, the fitting part can be smoothly guided inside the cylindrical part in the process of assembling the electric wire cover.

<Invention of Claim 4>
When water enters the electric wire cover, the water enters the gap and is guided to the bottom side of the electric wire cover along the sub-inclined surface. For this reason, it is prevented that water permeates into the through hole of the mounting cylinder part, and the sealing property in the through hole of the mounting cylinder part can be kept good.

Sectional drawing showing the disassembled state of the connector of this embodiment Sectional drawing showing the state which fitted the 1st housing and the 2nd housing and removed the tool Sectional drawing showing the state by which the tool was correctly fitted by the fitting part and the 1st housing and the 2nd housing were fitted Sectional drawing showing the state in which the tool fits into the fitting part and does not interfere with the interference part Sectional view showing the state where the tool interferes with the interference part Partially cutaway plan view showing the state in which the electric wire is scraped by the tubular part Top view of the wire cover Bottom view of wire cover Enlarged sectional view of the bottom of the wire cover and its surroundings

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2, the connector 10 of this embodiment includes a first housing 11 made of a synthetic resin (a housing which is a constituent element of the present invention) in which a plurality of wires 13 are led out from a wire lead-out surface 12, A synthetic resin wire cover 30 that is attached to one housing 11 and covers the wire lead-out surface 12, and is screwed with a tool 21 from the outer surface side of the wire cover 30, whereby the first housing 11 is moved to the second housing 23 (the present invention). And a bolt 17 to be assembled to a mating member).

  As shown in FIGS. 1 and 2, a plurality of first terminal accommodating chambers 14 are formed inside the first housing 11 so as to vertically penetrate the first housing 11 with the wire lead-out surface 12 facing upward. . A first terminal fitting 15 is inserted into each first terminal accommodating chamber 14 from above the first housing 11 (on the back side of the first housing 11). The electric wires 13 connected to the first terminal fittings 15 are led upward from the electric wire lead-out surface 12 (back surface) of the first housing 11. The first housing 11 is formed with a through hole 16 that vertically penetrates the central portion of the electric wire outlet surface 12.

  The bolt 17 includes a cylindrical main body 18, a hexagonal fitting part 19 (see FIG. 6) formed coaxially at the upper end of the main body 18, and coaxially downward from the lower end of the main body 18. It is comprised from the external thread part 20 extended. The bolt 17 has its main body 18 facing the through hole 16 with its axis 17A directed in the vertical direction (the direction in which both the housings 11 and 23 are fitted and the direction in which the electric wire cover 30 is assembled to the first housing 11). It is attached in the state fitted in. The attached bolt 17 is in a state in which relative displacement in the vertical direction is restricted with respect to the first housing 11 and rotation about the axis 17A is allowed. The fitting part 19 is arrange | positioned in the position which protruded upwards of the electric wire derivation | leading-out surface 12 (upper surface). The male screw portion 20 protrudes downward from the front surface (lower surface) of the first housing 11.

  3-5, the volt | bolt 17 is rotated using the elongate tool 21 whose outer periphery shape makes a cylindrical shape. A hexagonal fitting hole 22 is formed coaxially on the inner periphery of the tip of the tool 21 (the lower end when fitted to the fitting portion 19). In the state where the fitting hole 22 of the tool 21 is fitted to the fitting portion 19, when the operation force in the rotation direction about the axis 21 </ b> A is applied to the tool 21, the tool 21 and the bolt 17 are integrated. It is designed to rotate.

  As shown in FIG. 1, the second housing 23 has a plurality of second terminal accommodation chambers 24 corresponding to the first terminal accommodation chambers 14 of the first housing 11. A second terminal fitting 25 is accommodated in the second terminal accommodating chamber 24. A nut 26 is attached to the second housing 23 so as to correspond to the through hole 16 of the first housing 11 coaxially. The nut 26 attached to the second housing 23 is fixed in a state in which relative displacement in the axial direction (vertical direction) and rotation around the axial line are restricted with respect to the second housing 23.

  When fitting the first housing 11 and the second housing 23, the housings 11 and 23 are fitted shallowly, and the male screw portion 20 of the bolt 17 is inserted into the nut 26 a little. In this state, the tool 21 is coaxially fitted to the fitting portion 19 of the bolt 17 from above, and a rotational operation force is applied to the tool 21 to rotate the bolt 17. Then, when the bolt 17 is screwed into the nut 26, both the housings 11 and 23 approach each other, and the fitting state shown in FIGS.

  As shown in FIGS. 1, 7, and 8, the electric wire cover 30 is configured by integrally forming a cover main body 31 and a guide portion 36. As shown in FIG. 2, the cover main body 31 is configured to rise upward from the outer peripheral edge of the wire lead-out surface 12 (in a direction away from the wire lead-out surface 12) in a state where the wire cover 30 is attached to the first housing 11. An outer peripheral wall portion 32, an annular upper wall portion 33 connected to the upper end edge of the outer peripheral wall portion 32, and a cylindrical tube extending downward (in a direction approaching the wire lead-out surface 12) from the inner peripheral edge of the upper wall portion 33 Part 34. The outer peripheral wall portion 32 has a shape in which a part thereof in the circumferential direction is cut out, and a lead-out port 35 for leading the electric wire 13 turned in the electric wire cover 30 to the outside of the electric wire cover 30 is formed. Yes. The guide portion 36 extends from the upper edge portion of the opening edge of the outlet 35 to the outside of the wire cover main body 31. The electric wire 13 led out from the lead-out port 35 is taped along the guide portion 36.

  The cylindrical part 34 is a form in which the outer surface of the cover main body 31 (the electric wire cover 30) is recessed, and the recessed space serves as a work space 37 into which the tool 21 can be inserted. When the electric wire cover 30 is attached to the first housing 11, the fitting portion 19 is coaxially disposed on the bottom portion 38 (lower end portion) of the cylindrical portion 34 (work space 37). Between the outer periphery of the fitting part 19 and the inner peripheral surface of the cylindrical part 34, the clearance for accommodating the tool 21 in the state fitted on the fitting part 19 is ensured.

  The inner diameter dimension of the cylindrical portion 34 (work space 37) is minimum at the lower end (bottom 38) and maximum at the upper end. That is, the cylindrical portion 34 has a tapered shape in which the diameter dimension becomes smaller as the distance from the wire lead-out surface 12 becomes closer. And the upper end part in the inner periphery of the cylindrical part 34 (the opening edge part of the work space 37 on the outer surface of the electric wire cover 30 and the area farthest from the wire lead-out surface 12 in the cylindrical part 34) is on the entire periphery. It is an interference part 39. The technical significance of the interference unit 39 is as follows.

  As shown in FIG. 3, the tool 21 should be fitted coaxially with the bolt 17. However, even if the axis 21 </ b> A of the tool 21 is inclined with respect to the axis 17 </ b> A of the bolt 17, If the inclination angle is not large, the tool 21 is fitted into the fitting portion 19 of the bolt 17, so that the bolt 17 can be screwed. When the bolt 17 is screwed while the tool 21 is inclined, the tool 21 turns in a constant path around the axis 17A of the bolt 17 in the work space 37. When such a turning motion occurs in the work space 37 (in the cylindrical portion 34), the tool 21 excessively presses the inner periphery of the cylindrical portion 34, so that the cylindrical portion 34 or the cylindrical shape in the electric wire cover 30 is used. There is a concern that an area other than the portion 34 may be illegally deformed or damaged.

  Therefore, in the present embodiment, when the bolt 17 is tilted in an incorrect posture with the fitting portion 19 as a substantial fulcrum, the angle formed by the axis 17A of the bolt 17 and the axis 21A of the tool 21 intersecting at the fitting portion 19 is As shown in FIG. 5, when the fitting part 19 and the tool 21 are at an angle at which the fitting part 19 and the tool 21 cannot be fitted beyond the range in which the tool 21 can be fitted into the fitting part 19 so that the bolt 17 can be screwed. Only in this way, the tool 21 interferes (contacts) with the interference part 39.

  As described above, when the angle formed by the axis 21A of the tool 21 and the axis 17A of the bolt 17 is increased and the tool 21 interferes with the interference portion 39 of the wire cover 30, the tool 21 is detached from the fitting portion 19 and the bolt 17 Therefore, no matter how the tool 21 is operated, the tool 21 does not turn on a constant path around the axis of the bolt 17. Therefore, even if the tool 21 contacts the interference part 39, the pressing action from the tool 21 to the electric wire cover 30 including the interference part 39 is slight, and the electric wire cover 30 may be adversely affected by the interference of the tool 21. Absent.

  Further, as shown in FIG. 4, the angle formed between the axis 17 </ b> A of the bolt 17 and the axis 21 </ b> A of the tool 21 intersecting at the fitting portion 19 is relatively small, and the tool 21 is connected to the fitting portion 19 with respect to the bolt 17. The tool 21 does not interfere (contact) with the interference portion 39 when it is within a range where the screw can be fitted. In this state, as the bolt 17 is screwed in, the tool 21 turns on a constant path around the axis of the bolt 17, but the tool 21 is not in contact with the interference portion 39. Therefore, in this case, the wire cover 30 is not likely to be adversely affected by the interference of the tool 21.

  Further, in the present embodiment, the cylindrical portion 34 has a tapered shape such that the diameter dimension becomes smaller as it is closer to the wire lead-out surface 12. Therefore, when the electric wire cover 30 is assembled while being moved parallel to the housing so as to approach the electric wire outlet surface 12 from above, as shown in FIG. A plurality of electric wires 13 led out from the surface 12 are scraped. Therefore, there is no possibility that the electric wire 13 is caught between the tubular portion 34 and the electric wire outlet surface 12.

  Further, as shown in FIG. 9, the inner circumferential surface of the cylindrical portion 34 has an inclined surface 57 that decreases in a taper shape as it goes to the lower end side (the wire lead-out surface 12 side), and the most reduced diameter in the inclined surface 57. It consists of a sub-inclined surface 58 that expands in a curved shape from the inner bottom portion to the lower end opening edge of the bottom portion 38 (opening edge facing the wire lead-out surface 12). The bottom portion 38 of the cylindrical portion 34 has a thin shape toward the lower end side due to the sub-inclined surface 58.

  Since the cylindrical portion 34 has the inclined surface 57, a large working space 37 can be secured, and the bolt 17 can be shortened. Moreover, since the cylindrical part 34 has the sub-inclined surface 58, the fitting part 19 of the volt | bolt 17 will be smoothly drawn inside the bottom part 38 at the time of the assembly | attachment of the electric wire cover 30. FIG. For this reason, it is prevented that the lower end opening edge of the bottom part 38 interferes with the fitting part 19 of the bolt 17 and the bottom part 38 is damaged.

  Further, as shown in FIG. 1, the first housing 11 is formed with a cylindrical mounting cylinder portion 51 that protrudes upward from the wire lead-out surface 12. The through hole 16 is disposed inside the mounting cylinder portion 51. Further, a flange 52 is formed on the outer periphery of the lower end of the fitting portion 19 so as to extend over the entire circumference. As shown in FIG. 9, when the flange 52 abuts on the upper end opening edge 53 of the mounting cylinder portion 51, further tightening of the bolt 17 is prevented.

  As shown in FIG. 9, the outer peripheral surface of the mounting cylinder portion 51 and the sub-inclined surface 58 have a lap region that faces each other in the radial direction in a state where the electric wire cover 30 is assembled. A radial gap 55 is formed between the surface and the sub-inclined surface 58. For this reason, even if water enters the work space 37, the water enters the gap 55 and is guided to the bottom side of the electric wire cover 30 through the auxiliary inclined surface 58. Therefore, it is possible to prevent water from entering between the mounting cylinder portion 51 and the flange 52, and to maintain good sealing performance in the through hole 16 of the mounting cylinder portion 51. The water that has reached the electric wire outlet surface 12 is prevented from entering the first housing 11 by the rubber plug 60 (see FIG. 2) fitted to the first terminal fitting 15.

  Further, as shown in FIGS. 1 and 8, four first ribs 40 are formed on the outer peripheral surface of the cylindrical portion 34 (the surface facing the electric wire outlet surface 12). The 1st rib 40 is extended in the up-down direction in the several places spaced apart in the circumferential direction among the outer peripheral surfaces of the cylindrical part 34. As shown in FIG. In addition to the first rib 40, the wire cover 30 is also formed with a second rib 41 along the inner surface of the upper wall portion 33 and the inner surface of the outer peripheral wall portion 32. These ribs 40 and 41 enhance the overall strength of the wire cover 30 including the tubular portion 34, so that even if other members such as the tool 21 interfere with the wire cover 30, Deformation and the like are prevented.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the said embodiment, although the interference part was distribute | arranged to the opening edge part in a cylindrical part, the position near the bottom part in a cylindrical part may be sufficient.
(2) In the above embodiment, the cross-sectional shape that intersects the axis of the cylindrical part is circular, but the cross-sectional shape that intersects the axis of the cylindrical part may be a polygon.
(3) In the said embodiment, although the cylindrical part was made into the taper shape, the diameter dimension may be constant for a cylindrical part.

10 ... Connector 11 ... First housing (housing)
DESCRIPTION OF SYMBOLS 12 ... Electric wire lead-out surface 13 ... Electric wire 17 ... Bolt 17A ... Bolt axis 19 ... Fitting part 21 ... Tool 21A ... Tool axis 23 ... 2nd housing (counter member)
DESCRIPTION OF SYMBOLS 30 ... Electric wire cover 34 ... Cylindrical part 38 ... Bottom part of cylindrical part 39 ... Interference part 51 ... Installation cylinder part 55 ... Gap 57 ... Inclined surface 58 ... Sub-inclined surface

Claims (4)

A housing in which the wires are led out from the wire lead-out surface;
An electric wire cover attached to the housing and covering the electric wire outlet surface;
A bolt for assembling the housing to the mating member by being screwed with a tool from the outer surface side of the wire cover;
The outer wall surface of the electric wire cover is recessed to allow the insertion of the tool, and the bottom part is a cylindrical part in which a fitting part with the tool in the bolt is arranged,
An angle formed between the axis of the bolt and the axis of the tool, which is formed in the cylindrical portion and intersects with the fitting portion as a substantial fulcrum, allows the tool to be screwed into the fitting portion. A connector comprising: an interference portion that causes the tool to interfere with the electric wire cover only when the fitting portion and the tool are at an angle at which the fitting is not possible beyond a range where the fitting can be performed.   2. The connector according to claim 1, wherein the cylindrical portion has a tapered shape in which a diameter dimension becomes smaller as it is closer to the wire lead-out surface.   The inner peripheral surface of the cylindrical portion increases in diameter from an inclined surface that decreases in diameter as it approaches the wire lead-out surface, and an opening edge that faces the wire lead-out surface from the inner diameter of the inclined surface that is most reduced in diameter. The connector according to claim 2, further comprising a sub-inclined surface.   The housing is formed with a through-hole through which the bolt penetrates, and the through-hole is disposed inside a mounting cylinder protruding from the wire lead-out surface, and the fitting part is disposed at an opening end of the mounting cylinder Can be stopped when screwing is completed, and the outer peripheral surface of the mounting cylindrical portion and the sub-inclined surface of the cylindrical portion are arranged to face each other with a gap in the radial direction. The connector according to claim 3.

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