JP2013009518A - Corrugated tube holding structure - Google Patents

Abstract

A corrugated tube holding structure having high corrugated tube holding performance is provided.
A corrugated tube 30 is provided in which a locking groove 31a is provided on the outer peripheral surface with an interval in the axial direction, and a slit 30a is provided in the inner wire housing chamber 32 along the axial direction. In the corrugated tube holding structure, a corrugated tube holding chamber 24 for accommodating the corrugated tube 30 is provided, and a locking projection 25 entering the locking groove 31 a is provided on the inner surface of the corrugated tube holding chamber 24. Inner protrusions 26 are provided in the electric wire housing chamber 32, and the peripheral portions on both sides of the slit 30 a of the corrugated tube 30 are sandwiched between the locking protrusions 25 and the inner protrusions 26.
[Selection] Figure 5

Description

  The present invention relates to a corrugated tube holding structure for holding a corrugated tube.

  For example, a corrugated tube is used for bundling / protecting an electric wire drawn out from a connector, an electric junction box, a protector or the like while ensuring the freedom of routing. One end side of the corrugated tube used in such a place is held by a corrugated tube holding structure provided in a connector, a wire connection box or the like. As such a corrugated tube holding structure, those disclosed in Patent Document 1 and Patent Document 2 have been proposed.

  In the corrugated tube holding structure described in Patent Document 1, the corrugated tube slit is inserted into the protrusion of the electric wire cover to increase the diameter of the corrugated tube, whereby the outer peripheral surface of the corrugated tube is contacted with the inner peripheral surface of the electric wire cover. It has been touched.

  The corrugated tube holding structure described in Patent Document 2 is obtained by expanding the diameter of the corrugated tube by inserting the slit of the corrugated tube into the protrusion of the corrugated tube cover.

JP 2004-357386 A Japanese Utility Model Publication No. 6-84726

  However, in the corrugated tube holding structure of each of the conventional examples, the corrugated tube is held in a state where the corrugated tube is forcibly expanded in diameter, which may cause deformation of the corrugated tube. When the corrugated tube is deformed, a stable holding force cannot be maintained, and the holding force is reduced.

  Then, this invention is made | formed in order to solve the above-mentioned subject, and it aims at providing the corrugated tube holding structure with the high retainability of a corrugated tube.

  The present invention relates to a corrugated tube that wraps and holds a corrugated tube that is provided with a locking groove on the outer peripheral surface with an interval in the axial direction and that has a slit that opens in the inner wire accommodating chamber along the axial direction. The holding structure is provided with a corrugated tube holding chamber for receiving the corrugated tube, and an inner surface of the corrugated tube holding chamber is provided with a locking projection that enters the locking groove, and the electric wire receiving chamber of the corrugated tube The corrugated tube holding structure is characterized in that an inner protrusion disposed on the corrugated tube is provided between the slits of the corrugated tube and the inner protrusion is interposed between the engaging protrusion and the inner protrusion.

  It is preferable that the inner protrusion has a tapered surface on the side where the slit of the corrugated tube enters.

  The corrugated tube holding structure includes a connector cover that is mounted on a wire drawing side of a connector housing and is provided on a connector cover that leads the wire drawn from the connector housing to the outside through an internal wire housing chamber.

  According to the present invention, the corrugated tube is forcibly expanded by the inner protrusion in the mounting process, but returns to the original diameter in the mounted state, so that the corrugated tube is not deformed. Even if a load is applied to the corrugated tube for some reason, the deformation of the corrugated tube is restricted by the locking projection and the inner projection, so that the corrugated tube is not easily deformed in the reduced diameter direction. Therefore, the retainability of the corrugated tube is high.

1 is an exploded perspective view of a connector according to an embodiment of the present invention. 1 is a side view of a connector, showing an embodiment of the present invention. FIG. 3 is an inner view of the connector cover according to the embodiment of the present invention. 1 is a partial perspective view of a connector cover according to an embodiment of the present invention. 1A and 1B show an embodiment of the present invention, where FIG. 3A is a cross-sectional view taken along line AA in FIG. 2, and FIG. It is sectional drawing which shows one Embodiment of this invention and shows the corrugated tube just before mounting | wearing to a corrugated tube holding chamber. It is a disassembled perspective view of a connector, showing a comparative example. It is a side view of a connector, showing a comparative example. It is an inner surface figure of a connector cover which shows a comparative example. It is a partial perspective view of a connector cover, showing a comparative example. A comparative example is shown, (a) is a CC line sectional view of Drawing 8, (b) is a DD line expanded sectional view of (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
1-5 shows one Embodiment of the connector 1 to which the corrugated tube holding structure of this invention is applied. 1 and 2, a connector 1 includes a connector housing 2, a connector cover 10 attached to the connector housing 2 to which the corrugated tube holding structure of the present invention is applied, and a corrugate whose one end is fixed to the connector cover 10. Tube 30.

  The connector housing 2 has a connector fitting chamber (not shown) opened on the front surface and a pair of wire outlets 3 opened on the rear surface. A mating connector (not shown) is fitted into the connector fitting chamber. A pair of terminals (not shown) to which the terminals (not shown) of the mating connector are connected are arranged at the inner position of the connector fitting chamber. The terminal of the electric wire W is connected to each terminal, respectively. The pair of electric wires W are drawn to the outside from the pair of electric wire outlets 3. A waterproof plug 4 attached to the outer periphery of the electric wire W is press-fitted into each electric wire outlet 3. Each waterproof plug 4 prevents water or the like from entering the connector housing 2 from the wire outlet 3. A cover mounting wall 5 is integrally provided on the rear side of the connector housing 2. The cover mounting wall 5 surrounds the entire periphery of the pair of wire outlets 3. Lock grooves 6 are provided on both sides of the cover mounting wall 5.

  As shown in detail in FIGS. 3 and 4, the connector cover 10 includes a cover main body 11 and a corrugated lid portion 21 connected to a side portion of the cover main body 11 via a hinge portion 20.

  The cover main body 11 includes an electric wire cover main body portion 12 and a corrugated holding portion 13 provided integrally below the electric wire cover main body portion 12. An electric wire housing chamber 14 is provided inside the electric wire cover main body 12. Lock claws 15 are provided on both sides of the wire cover main body 12. The connector cover 10 is attached to the connector housing 2 by the pair of lock claws 15 engaging with the pair of lock grooves 6 of the cover mounting wall 5. In the mounted state of the connector cover 10, the electric wire cover main body 12 is fitted in a state where the front end side thereof partially overlaps the rear end side of the cover mounting wall 5. Thereby, the electric wire accommodating chamber 14 is almost closed.

  In the electric wire housing chamber 14, electric wire holding portions (not shown) are protruded at two places on the left and right. Each electric wire holding portion is formed by a pair of electric wire holding arms (not shown) that hold the electric wires W. Each electric wire W pulled out from the electric wire outlet 3 of the connector housing 2 is routed to the electric wire accommodating chamber 14 while being held by a pair of electric wire holding arms. Thereby, the free vibration of the electric wire W is suppressed in the electric wire holding chamber 14.

  In the electric wire housing chamber 14, waterproof plug pressing portions 17 are provided to project in two places on the left and right. Each waterproof plug holding portion 17 is a rod having a semicircular arc in cross section. The tip of each waterproof plug pressing portion 17 is in contact with the waterproof plug 4. Movement of the waterproof plugs 4 in the wire drawing direction is prevented by the waterproof plug holding portions 17.

  As shown in FIGS. 1 to 5, the corrugated lid portion 21 is connected to the end portion of the corrugated holding portion 13 via a hinge portion 20. Lock claws 22 are provided on both sides of the corrugated holding part 13, and frame-shaped lock arms 23 are provided on both ends of the corrugated cover part 21, respectively. The corrugated lid part 21 is united with the corrugated holding part 13 by the locking claw 22 of the corrugated holding part 13 being engaged with the lock arm 23 of the corrugated lid part 21. A corrugated tube holding chamber 24 is formed inside the corrugated holding part 13 and the corrugated lid part 21. One end side of the corrugated tube holding chamber 24 communicates with the wire housing chamber 14, and the other end side opens to the outside.

  A plurality of locking projections 25 project from the inner surface of the corrugated tube holding chamber 24 at intervals in the axial direction. One end side of the corrugated tube 30 is held in the corrugated tube holding chamber 24.

  The corrugated tube 30 is a tube having a bellows shape in which the concave portion 31A and the convex portion 31B are repeated in the axial direction, and a slit 30a is formed along the axial direction. The corrugated tube 30 can easily accommodate the electric wire W in the internal electric wire accommodating chamber 32 by using the slit 30a. The corrugated tube 30 is provided with locking grooves 31a at equal intervals on the outer peripheral surface due to its bellows shape. On one end side of the corrugated tube 30, the locking projections 25 of the corrugated tube holding chamber 24 are inserted into the locking grooves 31 a.

  In the corrugated tube holding chamber 24, an inner protrusion 26 extending from the wire cover main body 12 is disposed. The inner protrusion 26 is disposed along the axial direction of the corrugated tube holding chamber 24 and at a position separated from the tip of each locking protrusion 25 by a substantially thickness dimension of the corrugated tube 30. The inner protrusion 26 has a flat outer peripheral surface, but the inner peripheral surface is formed by a pair of left and right tapered surfaces 26a. The pair of tapered surfaces 26a have a tapered shape in which the center in the circumferential direction of the corrugated tube holding chamber 24 is a vertex. That is, the side where the slit 30a of the corrugated tube 30 enters is formed in the tapered surface 26a. The inner protrusion 26 is disposed in the electric wire housing chamber 32 of the corrugated tube 30. The peripheral portions on both the left and right sides of the slit 30a of the corrugated tube 30 are sandwiched by the locking projections 25 and the inner projections 26 from the inner and outer peripheral sides. Thus, the corrugated tube 30 has one end fixed to the connector cover 10. A pair of electric wires W arranged in the electric wire accommodating chamber 14 is drawn out from the connector cover 10 through the corrugated tube 30.

  The corrugated tube 30 is attached to the corrugated tube holding chamber 24 in the following procedure. As shown in FIG. 6, the corrugated tube 30 in which the electric wire W is accommodated in the electric wire accommodating chamber 32 is set at a position where the slit 30a coincides with the apex of the inner protrusion 26, and the corrugated tube 30 is moved in the direction of the arrow in FIG. Press. Then, the slit 30a of the corrugated tube 30 is gradually opened by the tapered surface 26a of the inner protrusion 26, and the inner protrusion 26 gradually enters the slit 30a. Then, when the inner protrusion 26 completely enters the electric wire accommodation chamber 32 of the corrugated tube 30, the slit 30 a is elastically deformed and closed, and the inner protrusion 26 is disposed in the electric wire accommodation chamber 32 of the corrugated tube 30.

  Here, the pressing of the corrugated tube 30 in the direction of the arrow in FIG. 6 may be performed by combining the corrugated lid portion 21 with the corrugated holding portion 13, or may be performed separately from the combining operation of the corrugated lid portion 21. good.

  As described above, the corrugated tube holding chamber 24 that accommodates the corrugated tube 30 is provided, and the locking projection 25 that enters the locking groove 31 a is provided on the inner surface of the corrugated tube holding chamber 24. An inner protrusion 26 disposed in the chamber 32 is provided, and the corrugated tube 30 is sandwiched between the locking protrusion 25 and the inner protrusion 26. Accordingly, the corrugated tube 30 is forcibly expanded in diameter by the inner protrusion 26 in the mounting process, but returns to the original diameter in the mounted state, so that the corrugated tube 30 is not deformed. And even if a load acts on the corrugated tube 30 for some reason, the deformation of the corrugated tube 30 is restricted by the locking projection 25 and the inner projection 26, so that the corrugated tube 30 is not easily deformed in the diameter reducing direction. Therefore, the retainability of the corrugated tube 30 is high, and the corrugated tube 130 is not easily detached from the connector cover 110.

  The inner protrusion 26 sandwiches the peripheral portions on both the left and right sides of the slit 30 a of the corrugated tube 30 together with the locking protrusion 25. Although the corrugated tube 30 is structurally weak and easily deformed, the corrugated tube 30 is capable of effectively preventing deformation of the corrugated tube 30 in the reduced diameter direction because the deformation around the slit 30a is restricted.

  In the corrugated tube 30, the slit 30 a is opened in the corrugated tube holding chamber 24 in the mounting process, but when the corrugated tube holding chamber 24 is mounted, the slit 30 a is returned to the closed position, so the slit 30 a is opened. Compared to the case, a stable holding force can be obtained.

  The inner protrusion 26 is formed on the tapered surface 26a on the side where the slit 30a of the corrugated tube 30 enters. Therefore, the inner protrusion 26 can be smoothly inserted into the electric wire housing chamber 32 inside the corrugated tube 30 from the slit 30a, and the mounting workability of the corrugated tube 30 is easy.

  The corrugated tube holding structure is applied to the connector cover 10 that is mounted on the electric wire drawing side of the connector housing 2 and leads the electric wire W drawn from the connector housing 2 to the outside through the internal electric wire accommodating chamber 14. Of course, any component (such as an electrical junction box or a protector) that holds the corrugated tube 30 can be applied.

(Comparative example)
7 to 11 show comparative examples of the present invention. 7 to 11, a connector 100 to which a corrugated tube holding structure according to a comparative example is applied includes a connector housing 102, a connector cover 110 attached to the connector housing 102, and a corrugated one end fixed to the connector cover 110. Tube 130.

  A pair of wire outlets 103 are provided on the rear surface of the connector housing 102. A pair of electric wires W are drawn out from the pair of electric wire outlets 103.

  The connector cover 110 includes a cover main body 111 and a corrugated lid 121 connected to a side portion of the cover main body 111 via a hinge part 120. The cover main body 111 includes an electric wire cover main body 112 and a corrugated holding portion 113 provided integrally below the electric wire cover main body 112.

  Lock claws 115 are provided on both sides of the wire cover main body 112. The connector cover 110 is attached to the connector housing 102 by the pair of lock claws 115 being engaged with the pair of lock grooves 106 of the connector housing 102.

  An electric wire housing chamber 114 is provided inside the electric wire cover main body 112.

  Lock claws 122 are provided on both sides of the corrugated holding portion 113, and frame-shaped lock arms 123 are provided on both ends of the corrugated lid portion 121. The corrugated lid part 121 is united with the corrugated holding part 113 by the locking claw 122 of the corrugated holding part 113 being engaged with the lock arm 123 of the corrugated lid part 121. A corrugated tube holding chamber 124 is formed inside the corrugated holding part 113 and the corrugated lid part 121. A plurality of locking projections 125 project from the inner surface of the corrugated tube holding chamber 124 at intervals in the axial direction.

  The corrugated tube 130 is a tube having a bellows shape in which a concave portion and a convex portion are repeated in the axial direction, and a slit 130a is formed along the axial direction. The corrugated tube 130 can easily accommodate the electric wire W in the electric wire accommodating chamber 132 by using the slit 130a. The corrugated tube 130 is provided with locking grooves 131a at equal intervals on the outer peripheral surface due to its bellows shape. One end side of the corrugated tube 130 is held by the connector cover 110 by the locking protrusions 125 of the corrugated tube holding chamber 124 entering the locking grooves 131a.

  Each electric wire W drawn out from the electric wire outlet 103 of the connector housing 102 is drawn out through the corrugated tube 130 via the electric wire accommodating chamber 114.

  However, in the corrugated tube holding structure of the comparative example, each locking protrusion 125 of the corrugated tube holding chamber 124 enters each locking groove 131a of the corrugated tube 130 to hold the corrugated tube 130 only. Since the corrugated tube 130 is formed with slits 130a along the axial direction, if a load is applied to the corrugated tube 130 for some reason, the corrugated tube 130 is easily deformed in the direction of the arrow (reduced diameter direction) in FIG. However, the retainability of the corrugated tube 130 is low. If the retainability is low, the corrugated tube 130 is easily detached from the connector cover 110.

  On the other hand, in the present invention, as described in the above embodiment, the corrugated tube 30 is highly retainable, and the corrugated tube 130 is not easily detached from the connector cover 110.

2 Connector housing 10 Connector cover 14 Wire housing chamber 24 Corrugated tube holding chamber 25 Locking protrusion 26 Inner protrusion 26a Tapered surface 30 Corrugated tube 30a Slit 31a Locking groove 32 Wire housing chamber W Electric wire

Claims (3)

A corrugated tube holding structure for holding a corrugated tube provided with a locking groove on the outer peripheral surface with an interval in the axial direction, and provided with a slit that opens in the electric wire housing chamber along the axial direction,
A corrugated tube holding chamber for accommodating the corrugated tube is provided, and an inner surface of the corrugated tube is provided with a locking projection that enters the locking groove, and is disposed in the wire receiving chamber of the corrugated tube. The corrugated tube holding structure is characterized in that peripheral portions on both sides of the slit of the corrugated tube are sandwiched between the locking protrusion and the inner protrusion. The corrugated tube holding structure according to claim 1,
The corrugated tube holding structure, wherein the inner protrusion has a tapered surface on the side into which the slit of the corrugated tube enters.   The corrugated tube holding structure according to claim 1 or 2 is provided on a connector cover that is attached to a wire drawing side of a connector housing and guides the wires drawn from the connector housing to the outside through an internal wire housing chamber. A corrugated tube holding structure characterized by that.

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