JPH10295599A - Extension pipe for electric cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-reliability extension pipe for electric cleaner. SOLUTION: This extension pipe for electric cleaner is provided with a cylindrical ring 6 which is attached at the hand operating part side terminal of hose for an extension pipe 4 while ring-shaping its hand operating part side at least, the outer form of hand operating part side terminal at a ring-shaped part 6a of cylindrical ring 6 is made almost equal with the outer form on the extension pipe side of hand operating part, a protruding rib 9 is provided integrally on the inner wall of ring-shaped part 6a while being protruded on the outer wall side of extension pipe 4, further, the protruding rib 9 is equipped with a lock part 9a and the extension pipe 4 is provided with a 1st projection part 10 to be locked with this lock part 9a so that the cylindrical ring 6 can be prevented from being easily detached from the extension pipe 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension pipe of a vacuum cleaner used in a general household.

[0002]

2. Description of the Related Art A conventional extension pipe for a vacuum cleaner will be described with reference to FIGS.

[0003] One end of a hose 2 is connected to the main body 1 of the vacuum cleaner, and the other end is provided with a hand operation unit 3 connected to a floor nozzle 5 via an extension pipe 4. Reference numeral 6 denotes a cylindrical ring attached to the end of the extension tube 4 on the side of the hand operation unit 3 and extends from a ring-shaped ring portion 6A provided on the side of the hand operation unit 3 and a part of the ring-shaped portion 6A. Extension 6 extended to pipe 4
B.

The outer shape of the end of the ring-shaped portion 6A on the side of the hand-operated portion 3 is substantially the same as that of the end of the hand-operated portion 3 on the side of the extension tube 4, so that there is no step between them and the appearance is reduced. We do not damage and do not mind at the time of grip.

Reference numeral 16 denotes a rib A integrally provided on the inner wall of the extension portion 6, which is engaged with a rib B17 provided on the extension tube 4 to prevent the tubular ring 6 from coming off the extension tube 4. doing. Reference numeral 18 denotes a protruding rib provided so as to protrude from the inner wall of the ring-shaped portion 6A toward the extension tube 4 side. When the ring-shaped portion 6A is pressed, its tip abuts on the extension tube 4 and the ring-shaped portion 6A
Does not deform.

[0006]

In the above-mentioned extension tube for a vacuum cleaner, as shown in FIG.
Is formed by a three-part mold. Therefore rib A16
In order to form the mold in the direction A, there is a slight inclination 16a due to the draft, and the protruding rib 18 and the ring-shaped portion 6a are also inclined in relation to the draft in order to pull the mold in the direction B. 18a and 6c had occurred. On the other hand, rib B17
As shown in FIG. 8, since the mold is formed by pulling out the mold in the direction C, the inclination 17 a also occurs, and when the cylindrical ring 6 is pressed strongly (in FIG. 8, from above), the cylindrical ring 6 There is a problem in that the rib A16 and the rib B17 are disengaged from the extension tube 4 as the center of rotation is tilted toward the hand operation unit 3 side.

The present invention has been made to solve the above-mentioned conventional problems, and has as its object to improve the reliability of an extension pipe.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a hand-operated operation part which is connected at one end to an electric vacuum cleaner body and at the other end to an extension pipe connected to a floor nozzle. And a tubular ring attached to the end of the extension tube at the side of the hand-operated portion and having at least the hand-operated portion side formed in a ring shape, the hand-operated portion of the ring-shaped portion of the tubular ring The outer shape of the side end portion is made substantially the same as the outer shape of the extension tube side end portion of the hand operation portion, and a protruding rib is provided integrally on the inner wall of the ring-shaped portion and protrudes on the outer wall side of the extension tube, Furthermore, by providing a locking portion on the protruding rib and providing a first protrusion on the extension tube to lock on the locking portion, even if the cylindrical ring is slightly inclined, a locking portion of the protruding rib, Make sure that the cylindrical ring does not come off the extension tube by engaging with the first projection. It is obtained by the.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION
One end is connected to the main body of the vacuum cleaner, and the other end is provided with a hand-operated portion fitted and connected to the extension tube connected to the floor nozzle, and is attached to the hand-operated portion side end of the extension tube. At least the hand operation unit side includes a cylindrical ring formed in a ring shape, and the outer shape of the hand operation unit side end of the ring-shaped portion of the cylindrical ring is the outer shape of the extension tube side end of the hand operation unit. Substantially the same, a protruding rib integrally provided on the inner wall of the ring-shaped portion and protruding on the outer wall side of the extension tube, further provided with a locking portion on the protruding rib, and By providing the first protrusion on the extension tube, even if the cylindrical ring is slightly inclined, the engaging portion of the protruding rib and the first protrusion reliably engage with each other, and the cylindrical ring is separated from the extension tube. It is something that does not come off.

According to a second aspect of the present invention, a downwardly inclined surface is provided on the side of the first operating portion on the side of the hand operating portion, so that the cylindrical ring can be easily fitted into the extension tube. is there.

According to a third aspect of the present invention, there is provided a hose having one end connected to the main body of the vacuum cleaner and the other end provided with a hand operating portion fitted and connected to an extension pipe connected to the floor nozzle.
At least the hand-operated part side is attached to the hand-operated part-side end of the extension tube, and at least the hand-operated part side is formed in a ring shape. A cylindrical ring formed substantially identically, a protruding rib integrally provided on an inner wall of the ring-shaped portion, and protruding toward an outer wall of the extension tube; a locking portion provided on the protruding rib; A first projection provided on the pipe and engaged with the engagement portion, and a second projection provided along with the first projection in a circumferential direction of the extension pipe; An inclined surface A is provided on the circumferential side, and an inclined surface B is provided on the surface of the second projection on the first projection side so as to cross the inclined surface A,
Inclined surface B provided on the second protrusion by the protrusion rib of the cylindrical ring
After the fitting is completed, the protruding rib becomes difficult to come off.

According to a fourth aspect of the present invention, there is provided a hose having one end connected to the main body of the vacuum cleaner and the other end provided with a hand-operated portion fitted and connected to an extension tube connected to the floor nozzle.
At least the hand-operated part side is attached to the hand-operated part-side end of the extension tube, and at least the hand-operated part side is formed in a ring shape. A cylindrical ring formed substantially identically; a circumferential rib extending from the inner wall of the ring-shaped portion along the outer circumference of the extension tube; and engaging with the circumferential rib provided on the extension tube. The provision of the third projections makes it possible to reliably engage the circumferential ribs with the third projections.

[0013]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. The same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

The cylindrical ring 6 is formed by a ring-shaped portion 6a and an engaging piece 6b extending toward the extension tube 4, has a rib A7 at the tip end, and is inserted by a rib B8 provided on the extension tube 4. It has a protruding rib 9 that prevents rearward escape and abuts the extension tube 4 from the top surface, and has an engaging portion 9a at the end on the hand operation unit 3 side. The extension tube 4 is provided with a locking portion 9a of the protruding rib 9.
And a first protrusion 10 provided with an inclined surface 10a inclined toward the hand operation unit 3 side.
When the cylindrical ring 6 is inserted into the extension tube 4, the projecting rib 9 gets over by using the inclined surface 10 a of the first projection 10 due to the elasticity of the resin, and the locking portion 9 a fits into the first projection 10. Come.

The operation of the above configuration is as follows.
The protruding rib 9 is used not only for the contact surface with the extension pipe 4 but also for the locking portion 9.
The falling of the extension tube 4 and the cylindrical ring 6 can be prevented by falling down to the hand operation unit 3 also by the radial surface and the longitudinal direction surface which constitutes a. Therefore, a reliable fitting force can be obtained.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. The same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The radial surface of the first projection 10 of the extension tube is formed as an inclined surface 11 with respect to the insertion direction of the cylindrical ring 6, and
When the cylindrical ring 6 is fitted to the extension tube 4, a second projection 12 is provided on the side opposite to the first projection 10 with the projection rib 9 of the cylindrical ring 6 interposed therebetween. First protrusion 1
The inclined surface A1 provided on the first protrusion 10 on the 0-side radial surface
An inclined surface B <b> 13 is provided in a direction crossing 1.

The operation of the above configuration is as follows.
By utilizing the fact that the projecting rib 9 easily bends in the radial direction with the top surface of the cylindrical ring 6 as a fulcrum, when the cylindrical ring 6 is inserted into the extension tube 4, the projecting rib 9 becomes the first projection. 10
Is bent toward the second projection 12 side by the inclined surface A11, but is returned to the original state by the inclined surface B13 of the second projection 12, and finally gets over the first projection 10. .
The operating force at this time can be very light because the thin protruding rib 9 only needs to bend in the radial direction. Further, since the second protrusion 12 prevents the projecting rib 9 from being excessively bent, it is also possible to prevent whitening or the like at the root.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIG. The same components as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The cylindrical ring 6 abuts on the outer periphery of the extension tube 4 and has a circumferential rib 14 separated at the center so as to be able to bend in the radial direction. Further, the extension tube 4 has a third protruding portion 15 having an inclined surface C15a disposed on the end surface on the side of the hand operation unit 3.

The operation of the above configuration is as follows.
When inserting the cylindrical ring 6 into the extension tube, the circumferential rib 1
4 is the third protrusion 15 with a light operating force due to the inclined surface 15a.
Get over. In addition, since the detachment can be prevented by the circumferential ribs 14 on both sides separated at the center, a sufficient fitting force can be obtained.

[0022]

According to the first aspect of the present invention,
An extension tube for a vacuum cleaner having an excellent function of improving the fitting force between the cylindrical ring and the extension tube can be provided.

According to the second to fourth aspects of the present invention, there is provided an extension tube for a vacuum cleaner having excellent functions of reducing the operating force and improving the fitting force when inserting the cylindrical ring into the extension tube. be able to.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of an extension pipe for a vacuum cleaner showing a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the extension pipe for the vacuum cleaner.

FIG. 3 is an exploded perspective view of a main part of an extension pipe for a vacuum cleaner showing a second embodiment of the present invention.

FIG. 4 (a) is an operation view of a main part of the extension pipe for the vacuum cleaner. (B) is an operation view of a main part of the extension pipe for the vacuum cleaner (before engaging with the protruding rib and the first projection).

FIG. 5 is an exploded perspective view of a main part of an extension pipe for a vacuum cleaner showing a third embodiment of the present invention.

FIG. 6 is an overall view of a vacuum cleaner.

FIG. 7 is an exploded perspective view of a main part of a conventional extension pipe for a vacuum cleaner.

FIG. 8 is a sectional view of an essential part of the extension pipe for the vacuum cleaner.

FIG. 9 is a cross-sectional view of a mold for molding a cylindrical ring for the extension pipe.

[Explanation of symbols]

 4 Extension Tube 6 Cylindrical Ring 9 Projecting Rib 10 First Projection

Claims (4)

[Claims] 1. A hose having one end connected to the main body of the vacuum cleaner and the other end provided with a hand operating portion fitted and connected to an extension tube connected to the floor nozzle, and a hand operating portion side end of the extension tube. A tubular ring attached to the portion and at least a hand-operated portion side is formed in a ring shape, wherein the outer shape of the hand-operated portion side end of the ring-shaped portion of the cylindrical ring is an extension tube side end of the hand-operated portion. The outer shape of the ring-shaped portion is provided integrally with the inner wall of the ring-shaped portion, and a protruding rib is provided to protrude toward the outer wall of the extension tube; An extension tube for a vacuum cleaner, wherein a first projection that locks on the extension tube is provided on the extension tube. 2. The extension tube for a vacuum cleaner according to claim 1, wherein a rearwardly inclined surface is provided on the hand side of the first protrusion. 3. A hose having one end connected to the main body of the vacuum cleaner and the other end provided with a hand operating portion fitted and connected to an extension tube connected to the floor nozzle, and a hand operating portion side end of the extension tube. A cylindrical ring which is attached to the portion and at least a hand-operated portion side is formed in a ring shape, and an outer shape of a hand-operated portion side end portion of the ring-shaped portion is formed substantially identical to an outer shape of the hand-operated portion on an extension tube side. A projection rib integrally provided on the inner wall of the ring-shaped portion and protruding toward the outer wall of the extension tube, a locking portion provided on the projection rib, and a locking portion provided on the extension tube. A first protruding portion to be locked;
A second projection provided in parallel with the first projection, an inclined surface A provided on the circumferential side of the first projection, and an inclined surface provided on the surface of the second projection on the first projection side. An extension pipe for a vacuum cleaner having an inclined surface B crossing A. 4. A hose having one end connected to the main body of the vacuum cleaner and the other end provided with a hand operating portion fitted and connected to an extension tube connected to the floor nozzle, and a hand operating portion side end of the extension tube. A cylindrical ring which is attached to the portion and at least a hand-operated portion side is formed in a ring shape, and an outer shape of a hand-operated portion side end portion of the ring-shaped portion is formed substantially identical to an outer shape of the hand-operated portion on an extension tube side. And a circumferential rib extending from the inner wall of the ring-shaped portion along the outer circumference of the extension tube, and a third projection provided on the extension tube and engaging with the circumferential rib. Extension tube for vacuum cleaner.