JP4049746B2 - Hose for vacuum cleaner - Google Patents

Description

  The present invention relates to a hose for a vacuum cleaner, and more particularly to a hose for a vacuum cleaner having a connecting pipe connected to the inner peripheral surface of a flexible hose.

The inventor of this application has proposed in Japanese Patent Application No. 2003-368282 as a hose for a vacuum cleaner of this kind. This vacuum cleaner hose has a flexible hose and a connection pipe having one end connected to the inner peripheral surface of the flexible hose and the other end exposed to the outside of the flexible hose. The airtightness between the flexible hose and the connecting rod is improved by filling the outer peripheral surface of the connecting pipe exposed from the surface with the molding resin over the outer peripheral surface of the connecting tube (see, for example, Patent Document 1).
Japanese Patent Application No. 2003-368282

  However, no consideration is given to the gate position of the mold filling the mold resin. For example, as shown in FIG. 16, the mold is placed on the outer peripheral surface of the connection pipe 7 away from the outer peripheral surface of the flexible hose 6. When 70 gates 71 are provided, the end of the flexible hose 6 is swollen by the pressure of the mold resin 24 filled from the gate 71, and the inner peripheral surface of the flexible hose 6 and the outer peripheral surface of the connecting pipe 7 There is a risk that the mold resin 24 may intrude during this time. And by the shrinkage | contraction to the inner peripheral direction accompanying cooling of the mold resin 24, a clearance gap arises between the inner peripheral surface of the flexible hose 6 and the outer peripheral surface of the connection pipe 7, and the flexible hose 6 and the connecting rod 7 There is a possibility that the problem of impairing the airtightness of the material may occur.

  The present invention has been made to solve such a problem, and provides a hose for a vacuum cleaner that can stabilize quality with a simple configuration and can improve airtightness. Let it be an issue.

Means for solving the above problems include a flexible hose and one end connected to the inner peripheral surface of the flexible hose from the end of the flexible hose and the other end exposed outside the flexible hose. Connecting pipe, a cylindrical base connected to the other end of the connecting pipe, a sliding contact disposed on the outer peripheral surface of the base, and one end electrically connected to the sliding contact A power supply line, the other end of which is electrically connected to the conductive wire of the flexible hose, and a slide connected to the connecting piece and the base portion and electrically connected to the sliding contact piece. A mounted portion having a moving contact, and one end of the power supply line is connected from the inner peripheral surface side of the base portion to the connecting portion of the sliding contact piece penetrating from the outer peripheral surface of the base portion to the inner peripheral surface, Filled from the outer peripheral surface of the flexible hose near the end of the flexible hose to the outer peripheral surface of the connection pipe exposed outside the flexible hose. The mold resin for fixing the flexible hose and the connecting pipe is provided, and the gate of the mold filling the mold resin is formed at a position corresponding to the outer peripheral surface of the flexible hose. The tube is filled from the outer peripheral surface of the tube to the inner peripheral surface of the base portion .

  The power supply line may be covered with a mold resin.

  The tip of the gate of the mold may be inclined toward the connection pipe exposed outside the flexible hose.

  The flexible hose may be formed in a spiral shape, and the tip of the gate may be inclined toward a position on the connection pipe side exposed outside the flexible hose in the spiral shape of the flexible hose. .

  Further, the end surface of the mold resin on the outer peripheral surface of the flexible hose is an end portion of the flexible hose from one end of the connecting rod on the side connected to the inner peripheral surface of the flexible hose from the end portion of the flexible hose. It may be located on the side.

  The mold resin may be made of a substantially transparent material.

According to the first aspect of the present invention, the flexible hose can be brought into close contact with the outer peripheral surface of the connecting pipe by the pressure of the mold resin filled from the gate. Since it can be brought into close contact with the outer periphery of the tube, it is possible to prevent inconvenience due to the mold resin entering between the inner periphery of the flexible hose and the outer peripheral surface of the connection tube, and to stabilize the quality. At the same time, the airtightness can be improved . Moreover, since the base part which has a sliding contact piece is arranged in parallel with a connection pipe and connected to a flexible hose, it can prevent that the external shape of a hose becomes large. Further, the base portion can be fixed with the mold resin while maintaining airtightness, and the current-carrying portion can be insulated .

  According to the configuration of claim 3 of the present invention, since the power supply line is covered with the mold resin, the power supply line is protected by the mold resin and the quality is improved.

  According to the configuration of the fourth aspect of the present invention, the mold resin easily flows to the connecting pipe side where the resin filling amount is large with respect to the gate position. In addition, the airtightness can be improved.

  According to the configuration of claim 5 of the present invention, the mold resin is made to flow easily to the connecting pipe side where the resin filling amount is large with respect to the gate position by utilizing the spiral shape of the flexible hose. It is possible to prevent defective filling of the resin to stabilize the quality and improve airtightness.

  According to the structure of Claim 6 of this invention, even when a flexible hose is bent, there exists an effect of being able to prevent reliably that mold resin peels from a flexible hose by a connecting pipe.

  According to the structure of Claim 7 of this invention, there exists an effect that the defect in a manufacturing process, such as connection failure of a feeder, can be easily confirmed from an external appearance through a substantially transparent mold resin.

  The best mode for carrying out the vacuum cleaner hose according to the present invention will be described with reference to FIGS.

  The vacuum cleaner of the present invention includes a vacuum cleaner main body 1, a vacuum cleaner hose 2 connected to the vacuum cleaner main body 1, an extension pipe 4 connected to the vacuum cleaner hose 2 via a hand grip 3. The floor suction tool 5 is connected to the extension pipe 4 (see FIG. 1).

The vacuum cleaner hose 2 on the side connected to the hand grip 3 includes a flexible hose 6 and a cylinder whose one end is inserted and connected to the inner peripheral surface of the flexible hose 6. The connecting pipe 7 has a shape and a cylindrical base portion 8 connected to the other end of the connecting pipe 7 (see FIGS. 2 to 5).

  A pair of conductive wires 9 are embedded in the flexible hose 6 in a spiral shape. Further, a manufacturing lot number representing the date of manufacture is printed in the vicinity of the flexible hose end 10. The connecting pipe 7 is formed with a cylindrical insertion portion 11 inserted into the inner peripheral surface of the flexible hose 6 at one end side, and a substantially disc-shaped flange portion 12 formed at the other end side. Yes. A pair of notches 13 are formed in the collar portion 12 at opposite positions, and four fitting holes 14 are formed at equal intervals on the same circumference. A protruding portion 15 that protrudes outward from the outer peripheral surface is formed between the flange portion 12 and the insertion portion 11 of the connecting pipe 7 (see FIGS. 2 and 5).

  At one end of the base portion 8, a pair of fitting claws 16 are formed that fit into fitting holes 14 formed in the flange portion 12 of the connecting pipe 7. A pair of sliding grooves 18 for mounting a pair of rectangular sliding contact pieces 17 are formed adjacent to the fitting claws 16 on the outer peripheral surface of the base portion 8, and A recessed groove 19 to be fitted and a seal groove 21 for mounting the packing 20 are provided in parallel with the sliding groove 18. The pair of sliding grooves 18 are formed with through holes 22 that allow the inner peripheral surface and the outer peripheral surface of the base portion 8 to communicate with each other (see FIGS. 2 to 5).

  Next, an assembling method of the vacuum cleaner hose 2 connected to the hand grip 3 will be described.

  One end of the sliding contact piece 17 is inserted into the through hole 22 from the outer peripheral surface of the base portion 8 and exposed to the inner peripheral surface, and then the sliding contact piece 17 is disposed on the outer peripheral surface along the sliding groove 18; The other end of the sliding contact piece 17 is exposed to the inner peripheral surface of the base portion 8 through the through hole 22 in the same manner as one end of the sliding contact piece 17. One end of the power supply line 23 is inserted into the inner peripheral surface of the base portion 8 from the fitting claw 16 side and electrically connected to the sliding contact piece 17 exposed on the inner peripheral surface of the base portion 8. Is electrically connected to the conductive wire 9 of the flexible hose 6.

  The insertion portion 11 of the connection pipe 7 is inserted into the inner peripheral surface of the flexible hose 6 from the flexible hose end 10 and the connection pipe 7 is attached to the flexible hose 6. Next, the fitting claw 16 of the base portion 8 is fitted into the fitting hole 14 of the connecting pipe 7 and the base portion 8 is attached to the connecting pipe 7. At this time, the feeder line 23 is wired so as to pass through the notch 13 (see FIGS. 2 to 5).

  In a state in which the connecting tube 7 and the base portion 8 are mounted on the flexible hose 6, the gold is formed so as to support the inner peripheral surface of the base portion 8 and the connecting tube 7 and the outer peripheral surface of the connecting tube 7 and the flexible hose 6. The mold 70 is set, and the mold 70 is filled with a substantially transparent mold resin 24. The mold resin 24 is filled from the outer peripheral surface in the vicinity of the flexible hose end portion 10 to the outer peripheral surface of the connection pipe 7, and from the outer peripheral surface of the connection pipe 7 through the notch 13 of the flange portion 12. It is filled over the inner peripheral surface of the base portion 8 corresponding to the sliding contact piece 17. As a result, the flexible hose 6, the connecting pipe 7, and the base portion 8 are held and fixed by the mold resin 24. Moreover, the end surface of the mold resin 24 on the outer peripheral surface of the flexible hose 6 is formed so as to be positioned closer to the flexible hose end portion 10 than the distal end of the insertion portion 11 of the connection pipe 7 (see FIG. 6). .

  In the mold 70 filled with the mold resin 24, a gate 71 is formed at a position corresponding to the outer peripheral surface of the flexible hose 6, as shown in FIG. With this configuration, the flexible hose 6 can be brought into close contact with the outer peripheral surface of the connecting pipe 7 by the pressure of the mold resin 24 filled from the gate 71, so that the inner peripheral surface of the flexible hose 6 and the connecting pipe 7 The occurrence of inconvenience due to penetration of the mold resin 24 between the outer peripheral surface and the outer peripheral surface can be prevented, the quality can be stabilized, and the airtightness can be improved.

  The tip of the gate 71 is inclined toward the connecting pipe 7 side where the amount of the mold resin 24 is filled with respect to the position of the gate 71. As a result, the mold resin 24 can easily flow to the side of the connecting pipe 7 where the filling amount of the mold resin 24 is large, so that the connecting pipe 7 side can be prevented from being insufficiently filled, quality can be stabilized, and airtight Can be improved (see FIG. 7).

  As another method for preventing the connecting pipe 7 side where the filling amount of the mold resin 24 is large with respect to the position of the gate 71 from being insufficiently filled, the tip of the gate 71 is flexed as shown in FIGS. You may make it incline in the direction which goes to the connecting pipe 7 exposed out of the flexible hose 6 along the spiral shape of the property hose 6. With this configuration, the mold resin 24 filled from the gate 71 flows toward the connecting pipe 7 along the spiral shape of the flexible hose 6, so that the connecting pipe 7 side where the mold resin 24 is filled is insufficiently filled. Never become.

  The mold 70 on the inner peripheral surface side of the flexible hose 6 is in contact with the inner peripheral surface of the connection pipe 7 without being in direct contact with the flexible hose 6. As a result, the heat of the mold resin 24 filled in the flexible hose 6 is not taken by the mold 70 and cooled, but is insulated by the connection pipe 7. Insufficient filling can be prevented.

  Further, when the flexible hose 6 is bent, the connecting tube 7 can prevent the flexible hose 6 from being deformed in the inner diameter direction and the mold resin 24 from being peeled off from the flexible hose 6. As a result, the airtightness of the vacuum cleaner hose 2 can be improved. Furthermore, since the end surface of the mold resin 24 on the outer peripheral surface of the flexible hose 6 is formed so as to be positioned closer to the flexible hose end portion 10 than the distal end of the insertion portion 11 of the connection pipe 7, the flexible hose It is possible to reliably prevent the flexible hose 6 near the end surface of the mold resin 24 from being crushed or the mold resin 24 from being peeled when the 6 is bent (see FIG. 6).

  After electrically connecting the sliding contact piece 17 mounted on the base portion 8 and the conductive wire 9 of the flexible hose 6 in advance by the power supply line 23, the base portion 8 is connected to the flexible hose via the connecting pipe 7. 6, the length of the feeder line 23 can be shortened, and the assembly workability of the vacuum cleaner hose 2 can be improved.

  Since the power supply line 23 is covered with the mold resin 24, no external force is applied to the power supply line 23, and the power supply line 23 can be protected.

  The electrical connection portion between one end of the feeder line 23 and the conductive wire 9 and the electrical connection portion between the other end of the feeder line 23 and the sliding contact piece 17 are both energized portions. Is covered with the mold resin 24, so that there is no problem in insulation. Further, since the inner peripheral surface of the base portion 8 is filled with the mold resin 24, the sliding contact pieces are fixed by fixing both ends of the sliding contact piece 17 exposed on the inner peripheral surface of the base portion 8 with the mold resin 24. 17 can be fixed to the base portion 8.

  Since the mold resin 24 is made of a substantially transparent material, the production lot number printed in the vicinity of the flexible hose end 10 can be confirmed from the appearance, and the connection failure of the power supply line 23 can be confirmed from the appearance. It can be easily confirmed.

  Since the base portion 8 having the sliding contact piece 17 can be juxtaposed with the flexible hose 6 via the connecting pipe 7, the outer diameter of the vacuum cleaner hose 2 can be reduced.

The tip of the vacuum cleaner hose 2 on the side connected to the hand grip 3 is inserted into the cylindrical portion 25 of the hand grip 3. A sliding portion 27 having a sliding contact 26 that comes into electrical contact with the sliding contact piece 17 is attached to the cylindrical portion 25 of the hand grip 3 by a lid 29 fixed by a screw 28. The lid 29 is formed with a protrusion 30 to be inserted into the concave groove 19 of the connecting tube 7, and the electric vacuum cleaner hose 2 is prevented from coming off the hand grip 3 by the protrusion 30. A seal 20 is attached to the seal groove 21, and the airtightness between the vacuum cleaner hose 2 and the cylindrical portion 25 of the hand grip 3 is maintained (see FIG. 6).

  The sliding contact 26 is electrically connected to the substrate 33 of the operation unit 32 of the hand grip 3 by a connection line 31. The hand grip 3 can be rotated 360 degrees in the circumferential direction with respect to the hose 2 for a vacuum cleaner. Even if the hand grip 3 rotates, the sliding contact 26 is always in electrical contact with the sliding contact piece 17. A pair of covers 34 are mounted so as to cover the vicinity of the flexible hose end 10 in the vicinity of the cylindrical portion 25 of the hand grip 3. A groove 35 is formed in the cover 34, and the cover 34 is prevented from coming off by engaging the protrusion 15 with the groove 35. By removing the cover 34, the production lot number printed in the vicinity of the flexible hose end 10 can be easily confirmed from the appearance through the substantially transparent mold resin 24 (FIG. 6). reference).

  The vacuum cleaner hose 2 on the side connected to the vacuum cleaner main body 1 has a flexible hose 6, a connection portion 36 to which the end of the flexible hose 6 is connected, and one end connected to the vacuum cleaner main body 1. In addition, the other end is composed of a main body side hose connection portion 37 connected to the connection portion 36.

  The connecting portion 36 is formed with a retaining hole 38 for preventing the vacuum cleaner hose 2 from coming off. In addition, a terminal 39 is formed in the connection portion 36, and a lead wire 40 electrically connected to the conductive wire 9 of the flexible hose 6 extends outside the connection portion 36 via the terminal 39. . A connection terminal 41 that is electrically connected to the cleaner body 1 is connected to the tip of the lead wire 40. The outer peripheral surface in the range from the vicinity of the end of the flexible hose 6 to the terminal 39 is covered with a mold resin (not shown) (see FIG. 7).

  The main body side hose connection part 37 has an insertion part 42 connected to the cleaner main body 1 on one end side and an inserted part 43 into which the connection part is inserted on the other end side. A storage portion 44 is formed on the outer peripheral surface of the main body side hose connection portion 37. The storage portion 44 includes a through hole 45 corresponding to the retaining hole 38 of the connection portion 36, a connection terminal holding portion 46 for holding the connection terminal 41, a lead wire processing portion 47 for wiring the lead wire 40, and cleaning. A clamp hook holding portion 49 for holding a clamp hook 48 that engages with the machine body 1 is formed. The clamp hook 48 is biased by a spring 50 in a direction in which the clamp hook 48 engages with the cleaner body 1. A guide rib 51 is formed on the outer wall of the storage portion 44, and an insertion wall 52 is formed on the inserted portion 43 side. A locking hole 53 is formed in the insertion wall 52, and a relief portion 54 through which the terminal 39 and the lead wire 40 are inserted when the connecting portion 36 is connected to the main body side hose connecting portion 37 is formed. (See FIG. 7).

  The storage portion 44 is closed by a cover portion 55 that is positioned by the guide rib 51 and the insertion wall 52 of the storage portion 44. The cover portion 55 is inserted into the insertion portion 56 through which the clamp hook 48 is inserted in order to expose the clamp hook 48 and the locking hole 53 formed in the main body side hose connection portion 37, and one end of the cover portion 55 is locked. A locking claw 57 to be screwed, a screw hole 58 for screwing the other end of the cover portion 55, a blindfold for blinding the escape portion 54, a lead wire insertion hole 60 through which the lead wire 40 is inserted, A retaining protrusion 61 that is inserted into the retaining hole 38 through the hole 45 is formed. By inserting the retaining projection 61 into the retaining hole 38 through the through hole 45, the main body side hose connecting portion is prevented from coming off with respect to the connecting portion 36, and both ends of the retaining convex portion 61 are connected to the retaining hole 38. By contacting both ends, the main body side hose connection portion 37 is prevented from rotating with respect to the connection portion 36 (see FIGS. 7 to 12).

  Since the molding resin that fixes the flexible hose 6 and the connection portion 36 is inserted into the main body side hose connection portion 37 and hidden, the appearance can be improved without increasing the number of components. In addition, the vacuum cleaner hose 2 on the side connected to the vacuum cleaner body 1 can be assembled simply by storing the components in the storage portion 44 and closing the storage portion 44 with the cover portion 55, thus simplifying the configuration. In addition, the assembly workability can be improved. Furthermore, since the cover part 55 can be positioned by the guide rib 51 and the insertion wall 52, assembly workability | operativity can further be improved.

  By connecting the vacuum cleaner hose 2 to the hand grip 3 and the vacuum cleaner body 1, the vacuum cleaner body 1 and the substrate 33 of the hand grip 3 are electrically connected via the conductive wire 9 of the flexible hose 6. It has come to be.

It is a side view of the vacuum cleaner of the best form for implementing this invention. The side view of the hose for vacuum cleaners connected to the hand grip shows a disassembled state. It is the side view of the hose for vacuum cleaners of the side connected to the hand grip, and shows the assembled state. It is the sectional side view of the hose for vacuum cleaners of the side connected to the hand grip, and shows the assembled state. It is a longitudinal cross-sectional view of the hose for vacuum cleaners on the side connected to the hand grip, and shows the AA cross section of FIG. It is side sectional drawing of the state which connected the hose for vacuum cleaners to the hand grip. It is a sectional side view of the hose for vacuum cleaners on the side connected to the hand grip, and shows the gate position of the mold filled with mold resin. It is a side view of the hose for vacuum cleaners by the side connected to the same hand grip, and shows the gate position of the metallic mold filled with mold resin of other forms. It is sectional drawing of the metal mold | die of FIG. 8, and shows the shape of a gate. It is a disassembled perspective view of the hose for electric vacuum cleaners by the side connected to the vacuum cleaner main body. It is a sectional side view of the hose for electric vacuum cleaners of the side connected to the vacuum cleaner main body, and shows the shape of a prevention convex part. The shape of a fixed nail | claw is shown with the side view of the hose for electric vacuum cleaners of the side connected to the vacuum cleaner main body. It is a perspective view of the hose for vacuum cleaners by the side connected to the vacuum cleaner body, and shows the attachment state of a cover part. It is a side view of the hose for vacuum cleaners by the side connected to the vacuum cleaner main body, and shows the engagement state of a cover part. It is an exploded perspective view of the hose for vacuum cleaners on the side connected to the vacuum cleaner main body, and shows the engagement state of the cover part. It is sectional drawing of the metal mold | die filled with mold resin, and shows the state which provided the gate of the metal mold | die in the position remove | deviated from the outer peripheral surface of the flexible hose.

Explanation of symbols

6 Flexible hose 7 Connection pipe 8 Base part 17 Sliding section 24 Mold resin 70 Mold 71 Gate

Claims (4)

A flexible hose, one end is connected from the end of the flexible hose to the inner peripheral surface of the flexible hose, and a connecting pipe to which the other end is exposed to the outside of the flexible hose, the other of the connecting pipe A cylindrical base portion connected to the end, a sliding contact piece disposed on the outer peripheral surface of the base portion, one end is electrically connected to the sliding contact piece, and the other end is the movable portion. A power supply line electrically connected to the conductive wire of the flexible hose, and a mounted portion having a sliding contact to which the connection pipe and the base portion are connected and electrically connected to the sliding contact piece. The one end of the power supply line is connected from the inner peripheral surface side of the base portion to the connecting portion of the sliding contact piece penetrating from the outer peripheral surface of the base portion to the inner peripheral surface, and near the end portion of the flexible hose. Filled from the outer peripheral surface of the flexible hose to the outer peripheral surface of the connecting pipe exposed to the outside of the flexible hose to fix the flexible hose and the connecting pipe And a mold gate filled with the mold resin is formed at a position corresponding to the outer peripheral surface of the flexible hose, and the mold resin extends from the outer peripheral surface of the connection pipe to the inner periphery of the base portion. A hose for a vacuum cleaner, which is filled over a surface . The feed line for an electric vacuum cleaner hose according to claim 1, characterized in that it is covered with the molding resin. The end surface of the mold resin on the outer surface of the flexible hose is located on the end side of the flexible hose from one end of the connection pipe connected from the end of the flexible hose to the inner peripheral surface of the flexible hose. The hose for a vacuum cleaner according to claim 1 or 2 , wherein the hose is for a vacuum cleaner. The said mold resin is comprised with the substantially transparent material, The hose for vacuum cleaners in any one of Claims 1-3 characterized by the above-mentioned.

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