JPH11137490A - Extension tube for vacuum cleaner and vacuum cleaner using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extension pipe for a vacuum cleaner excellent in usability, in which an extension pipe is not twisted during a cleaning operation, a floor nozzle does not become inclined, and can be easily expanded and contracted. An outer tube (11), an inner tube (12) slidably slidable in the outer tube (11) and provided with a concave portion (17) outward, a holding portion (13) at the tip of the outer tube (11), and an inner tube in the holding portion (13) A locking member 15 rotatably provided on an outer surface of the locking member 12, a locking shaft 14 for locking a concave portion 17 on the inner surface of the locking member 15, and an urging member 16 for biasing the locking shaft 14 to the concave portion 17. When the extension tube 10 is used, the locking shaft 14 locks the concave portion 17 by the urging force of the urging member 16 so that the extension tube 10 is not twisted. The locking body 15 is rotated on the outer surface of the inner tube 12 by urging the locking shaft 14 so that the locking of the locking shaft 14 to the concave portion 17 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic extension tube for a vacuum cleaner and a vacuum cleaner using the same.

[0002]

2. Description of the Related Art The prior art is shown in FIGS. First, the overall configuration of the vacuum cleaner will be described with reference to FIG. In the figure, one end of a hose 32 with a built-in conductive wire is connected to a suction port 31 of a cleaner body 30 having a built-in electric blower (not shown), and cleaning is performed by a hand operation unit 33 provided at the other end. The operation of the electric blower in the machine main body 30 is controlled. Hand operation unit 33
A telescopic extension tube 34 is connected to the
Consists of an outer pipe 1 connected to the hand operation unit 33 side and an inner pipe 4 inserted into the outer pipe 1, and an end of the inner pipe 4 is connected to a floor nozzle 37.

In FIGS. 17 and 18, the outer pipe 1 has a male thread 2 and a taper section 3 at its tip, and an inner pipe 4 can move in the outer pipe 1 in a slidable manner. Reference numeral 5 denotes a tightening nut having an internal thread 6 on the inner peripheral surface. Reference numeral 7 denotes a tightening ring having a slit 8 in the axial direction, and a taper portion 9 at one end of the outer peripheral surface which abuts on the taper portion 3 of the outer pipe 1.

In the above construction, the inner pipe 4 is connected to the outer pipe 1
When the nut 5 is tightened, the nut 5 and the tightening ring 7 are advanced in the direction of the arrow by the engagement of the male screw 2 and the female screw 6, and the taper 3 of the outer pipe 1 is tightened. The taper portion 9 of the attachment ring 7 is tightened, the fastening ring 7 closes the slit 8 and tightens the outer peripheral surface of the inner pipe 4, and the inner pipe 4 is fixed to the outer pipe 1.

[0005] With this configuration, the user can adjust the extension tube 34 to an appropriate length in accordance with the user's height, the place where the user uses the extension tube 34, and the like.

[0006]

However, in the telescopic extension tube having the above-mentioned structure, the inner pipe 4 and the outer pipe 1 are fixed by tightening the tightening ring 7, so that, for example, the tightening force is reduced. When the floor nozzle 37 is loose, when the end of the floor nozzle 37 collides with a wall or the like during cleaning, a rotating force acts around the extension pipe 34, the inner pipe 4 rotates with respect to the outer pipe 1, and the floor nozzle 37 rotates. However, there has been a problem that it becomes oblique to the operator or the extension tube 34 shrinks, making it extremely difficult to use.

An object of the present invention is to provide an extension tube for a vacuum cleaner which is easy to use and a vacuum cleaner using the same.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an outer tube having a holding portion, an inner tube having a concave portion formed on the outside of a side surface by sliding freely in the outer tube. A locking body provided rotatably with the outer surface of the inner tube in the holding portion, a locking shaft provided on the locking body and locking the recess, and urging the locking shaft toward the recess. When an urging body is provided, and when the anti-locking shaft side of the locking body is urged inward, the locking body rotates around the inner tube outer periphery, and the engagement between the locking shaft and the recessed portion. The inner tube and the outer tube are fixed by mechanical locking of the lock shaft, so that the inner tube does not rotate with respect to the outer tube during cleaning, and the floor nozzle is released. Since it does not become oblique to the operator, it is not difficult to use. It is also very easy to use because it can be expanded and contracted simply by pressing the locking body.

[0009]

According to the first aspect of the present invention, there is provided an outer tube having a holding portion, and a concave portion provided on the outer side of the outer tube by sliding freely in the outer tube. An inner pipe, a locking body rotatably provided with the outer surface of the inner pipe in the holding portion, a locking shaft provided on the locking body for locking in the recess, and And a biasing body that biases the locking body when the anti-locking shaft side of the locking body is urged inward, the locking body rotates around the inner tube outer periphery, and the locking shaft and Since the lock with the concave portion is released, and the inner tube and the outer tube are fixed by mechanical locking of the locking shaft, the inner tube may rotate with respect to the outer tube during cleaning. Also, since the floor nozzle is not inclined with respect to the operator, it is not difficult to use.

In addition, since the work of turning the nut to loosen and further tighten it can be omitted, and the work can be simply performed by pressing the locking body, the locking can be easily fixed and released.

According to a second aspect of the present invention, there is provided an outer tube having a holding portion, an inner tube slidably slidable in the outer tube and provided with a concave portion on a laterally outer side, and an inner tube provided in the holding portion. A locking member movably provided in a direction orthogonal to the axial direction of the locking member, a locking shaft provided on the locking member and locking the recess, and a biasing force for biasing the locking shaft toward the recess. When the non-locking shaft side of the locking body is urged inward, the locking body moves parallel to the outer circumference of the inner tube, and the locking between the locking shaft and the concave portion is stopped. Since the inner pipe and the outer pipe are fixed by mechanical locking of the locking shaft, the inner pipe does not rotate with respect to the outer pipe during cleaning, and the floor nozzle is released. Since it does not become oblique to the operator, it is not difficult to use.

In addition, since the work of turning the nut to loosen and further tighten it can be omitted and the work can be performed simply by pressing the locking body, the locking and unlocking can be easily performed.

According to the third aspect of the present invention, since the urging member is formed integrally with the locking member, the number of components is reduced as compared with a case where a separate component such as a spring is used. Since the manufacturing cost and the assembly cost are low, and there is no problem such as the detachment of the spring or the like, the cost can be reduced and the trouble can be reduced.

According to a fourth aspect of the present invention, an opening having substantially the same shape as the cross section of the locking member is provided in the outer tube, and after inserting the locking member through the opening, the inner tube is connected to the engaging member. It can be easily assembled simply by inserting the locking body into the opening of the outer tube and inserting the inner tube from the tip of the outer tube.

According to a fifth aspect of the present invention, the inner pipe has a substantially elliptical cross section, and the longitudinal direction of the inner pipe cross section is arranged in the vertical direction of the extension pipe. When inserting the inner tube from the tip of the outer tube at the time, it is necessary to pay attention to the insertion angle of the inner tube in order to align the position of the locking shaft on the inner surface of the locking body with the concave portion on the side of the inner tube. Since the cross section is formed in a substantially elliptical shape, the inner tube does not idle inside the outer tube and can be easily inserted.

Further, since the major axis direction of the substantially elliptical shape is arranged in the vertical direction of the extension tube, the width of the extension tube inner tube is smaller than the circular shape during the cleaning operation, and for example, penetrates into a gap between furniture and the like. Easy to clean.

According to a sixth aspect of the present invention, the cross section of the inner pipe is formed substantially in an oval shape, and the longitudinal direction of the cross section of the inner pipe is arranged in the vertical direction of the extension pipe. Since it is formed in a substantially oval shape, the insertion angle at which the inner tube can be inserted into the outer tube is fixed to one, and the locking shaft on the inner surface of the locking member and the concave portion on the outer side of the inner tube are securely fitted. Easy to assemble.

Further, according to a seventh aspect of the present invention, there is provided an electric blower for sucking dust, a dust collecting chamber for collecting dust, a main body having a suction port communicating with the dust collecting chamber, and one end thereof. A hose connected to the suction port and having the other end connected to the extension pipe for a vacuum cleaner according to any one of claims 1 to 6, and a suction tool connected to the extension pipe. Yes, the length of the extension tube can be adjusted during cleaning work with this vacuum cleaner just by pressing the locking member of the extension tube, so it is very long even when the height of the floor surface such as stairs changes frequently. It is easy to change the length, and the inner and outer pipes of the extension pipe are fixed by mechanical locking, so even if the suction tool collides against a wall etc. during cleaning work,
It is very easy to use without any problems with the extension tube shrinking.

[0019]

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. First, the overall configuration of the vacuum cleaner will be described with reference to FIG.

Referring to FIG. 1, a suction port 31 of a cleaner body 30 having a built-in electric blower (not shown) is provided at a suction port 31 of a conductive wire.
Hand 32 connected to one end of the
Controls the operation of the electric blower in the cleaner body 30.

An extension tube 10 which can be extended and contracted
The extension pipe 10 is composed of an outer pipe 11 connected to the hand operation unit 33 side, and an inner pipe 12 inserted movably in the axial direction in the outer pipe 11. The end is connected to the floor nozzle 37.

Next, the detailed structure of the extension pipe 10 is shown in FIG.
Description will be made using 3, 4, and 5. In FIG. 1, reference numeral 10 denotes an extension tube, which is constituted by an outer tube 11 and an inner tube 12 that slides freely in the outer tube 11, and a holding portion 13 is provided at a tip of the outer tube 11. The inner tube 1 is provided in the holding portion 13.
A locking body 15 is rotatably held on the inner surface of the holding portion 13 at the outer periphery and has a locking shaft 14 on the inner surface. The locking body 15 locks the concave portion 17 provided in the longitudinal direction of the side surface of the inner pipe 12 by the urging force of the urging body 16 provided outside, and the longitudinal direction of the extension pipe 10 of the inner pipe 12 Fixation. When no external force acts on the extension tube 10, the locking shaft 14 locks the concave portion 17 and the inner tube 12
And the outer tube 11 is fixed in the direction of expansion and contraction and torsion. On the other hand, when the locking member 15 is pushed inward into the extension tube 10 as shown in FIG. Turns to
The locking shaft 14 moves outward, and the locking with the concave portion 17 is released. That is, the locking body 15 rotates around the upper rear end G of the locking body 15, and the upper front end H of the locking body 15 contacts the upper part of the inner tube 12, while the lower front end of the locking body 15 Side, that is, the locking shaft 14 moves downward, and the locking shaft 1
4 comes off from the concave portion 17 of the inner tube 12. Reference numeral 18 denotes a packing, which is pressed against a gap between the outer pipe 11 and the inner pipe 12 to be air-tight. Reference numeral 20 denotes a tapered projection provided outside the rear end of the inner tube 12.
When the inner tube 12 is to be pulled out from the outer tube 11, the projection 20 collides with the locking body 15 and acts as a stopper for retaining.

Next, the operation and operation of the configuration of this embodiment will be described. When a cleaning operation is performed using the extension tube 10, the locking shaft 14 of the locking body 15 is engaged with the concave portion 17 by the urging force of the urging member 16, and the outer tube 11 and the inner tube 12 are stretched and twisted in the expansion and contraction direction. Floor nozzle 3
Also, when the extension pipe 10 shrinks when the wall 7 collides with the wall, and when the end of the floor nozzle 37 collides with the wall, the floor nozzle 3
When the length of the extension tube 10 is adjusted without causing any trouble such as the inclination of the extension tube 7, the locking body 15 is pressed downward more than the urging force of the urging body 16. Thus, the locking between the locking shaft 14 and the concave portion 17 is released, so that the length of expansion and contraction of the inner tube 12 and the outer tube 11 can be easily adjusted.

(Embodiment 2) Next, a second embodiment 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.

6 to 8, the outer peripheral portion of the inner tube 12 in the holding portion 13 is held by the inner surface of the holding portion 13 so as to be able to move in parallel in a direction perpendicular to the axial direction of the extension tube 10. A locking body 15 having a locking shaft 14 on the inner surface is provided. When the locking body 15 is pushed into the extension tube 10,
As shown in FIG. 8, the locking body 15 moves in the direction of arrow I, the locking shaft 14 moves outward, and the locking with the recess 17 is released.

Next, the operation and operation of the embodiment will be described. When a cleaning operation is performed using the extension tube 10, the locking shaft 14 of the locking body 15 is engaged with the concave portion 17 by the urging force of the urging member 16, and the outer tube 11 and the inner tube 12 are stretched and twisted in the expansion and contraction direction. Floor nozzle 3
Also, when the extension pipe 10 shrinks when the wall 7 collides with the wall, and when the end of the floor nozzle 37 collides with the wall, the floor nozzle 3
When the length of the extension tube 10 is adjusted without causing any trouble such as the inclination of the extension tube 7, the locking body 15 is pressed downward more than the urging force of the urging body 16. Thus, the locking between the locking shaft 14 and the concave portion 17 is released, so that the length of expansion and contraction of the inner tube 12 and the outer tube 11 can be easily adjusted.

(Embodiment 3) Next, a third embodiment will be described 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.

In FIG. 9, the urging member 16 is formed of a resin spring integrated with the locking member 15.

Next, the operation and operation of the configuration of this embodiment will be described. In the configuration of the extension tube 10, the urging member 16
Are formed integrally with the locking body 15, so that the number of parts is smaller than in the case where a separate part such as a spring is used,
In manufacturing, the cost of parts and assembly is reduced, and the inexpensive extension tube 10 can be provided. Also, in use, there is no problem such as a spring coming off during use.
It is possible to provide the extension pipe 10 having no failure.

(Embodiment 4) Next, a fourth embodiment 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.

In FIGS. 10 and 11, an opening 19 having the same shape as the cross section of the locking member 15 is provided in the holding portion 13 at the tip of the outer tube 11. The body 15 is inserted, and the inner tube 12 is further inserted from the distal end of the outer tube 11 so that the inner tube 12 passes through the locking body 15. The convex portion 20 is formed in a taper shape, and the inner tube 12 is inserted while deforming the locking body 15 like a wedge, and the inner tube 12 is connected to the outer tube 1.
When trying to pull it out from 1, the projection 20 collides with the locking body 15 and acts as a stopper for retaining.

Next, the operation and operation of the embodiment will be described. At the time of assembling the extension tube 10, the holding portion 1
The extension tube 10 can be formed simply by inserting the locking body 15 from the outside of the opening 19 of the third and further inserting the inner tube 12 from the tip of the outer tube 11, and assembling can be performed easily and promptly.
The extension tube 10 can be provided at a low assembly cost and at a low cost.

(Embodiment 5) Next, a fifth embodiment 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.

12 and 13, the inner tube 12 has a substantially elliptical cross section, and the inner tube 12 is arranged so that the long axis direction is the vertical direction of the extension tube.

Next, the operation and operation of the embodiment will be described. When assembling the extension pipe 10, the inner pipe 1
2 is inserted from the outer tube 11, but at this time, since the inner tube 12 has a substantially elliptical cross section, the inner tube 12 may run idle after insertion compared to a circular one. And the locking shaft 14 on the inner surface of the locking body 15 and the inner pipe 12
The insertion of the inner tube 12 can be easily performed without the concave portion 17 on the outside of the side face being shifted in the rotation direction. Also, when the extension pipe 10 is used, when the floor nozzle 37 is removed to clean a gap in furniture or the like, the short axis direction of the inner pipe 12 is the left-right direction of the extension pipe, so that it is formed in a circular shape. It is narrower than it is, easily penetrates into narrow gaps, and is easy to use.

(Embodiment 6) Next, a sixth embodiment 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.

14 and 15, the cross section of the inner tube 12 is formed in a substantially oval shape, and the inner tube 12 is arranged so that the long axis direction is the vertical direction of the extension tube.

Next, the operation and operation of the embodiment will be described. When assembling the extension pipe 10, the inner pipe 1
2 is inserted from the outer tube 11 at this time, the inner tube 12 has a substantially oval cross section, and there is only one insertion angle at which the inner tube 12 can be inserted into the outer tube 11. The locking shaft 14 on the inner surface of the stop body 15 and the concave portion 17 on the outer side of the inner tube 12 are not displaced in the rotation direction, and can be easily assembled.

(Embodiment 7) Next, a seventh embodiment will be described 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.

In FIG. 2, reference numeral 30 denotes a vacuum cleaner main body;
Inside there is an electric blower (not shown) that sucks dust.
A dust collecting chamber (not shown) for collecting the sucked dust and a suction port 31 communicating with the dust collecting chamber are provided. A hose 32 is connected to the suction port 31, and a floor nozzle 37 is connected to the end of the hose 32 via the extension pipe 10.

Next, the operation and operation of the embodiment will be described. When performing a cleaning operation with the present vacuum cleaner, the extension pipe 10 is merely pressed by the locking body 15 of the extension pipe 10.
The length of the extension pipe can be adjusted, so that the length of the floor can be easily changed even when the height of the floor surface such as a staircase changes frequently, and the inner pipe 12 and the outer pipe 11 of the extension pipe 10 are mechanically locked. Therefore, even when the floor nozzle 37 collides with a wall or the like during the cleaning operation, there is no problem such as the extension tube 10 shrinking, and the device is very easy to use.

[0042]

As is apparent from the above embodiment, according to the first aspect of the present invention, when the extension pipe is used, the locking shaft locks the recess of the inner pipe. The pipe does not rotate with respect to the outer pipe, and the floor nozzle does not become oblique to the operator, so it is easy to use. It is very easy to use because the lock to the recess is released.

According to the second aspect of the present invention, when the extension tube is expanded and contracted, the locking member moves in parallel only by pressing the locking member, and the locking shaft locks the inner tube recess. Very easy to use for unlocking.

According to the third aspect of the present invention, since the urging member is formed integrally with the locking member, the number of parts of the extension tube is small, the extension tube can be assembled quickly and easily, and it is inexpensive and has a failure. Can provide an extension tube without the need.

According to the fourth aspect of the present invention, the extension pipe can be easily and promptly assembled simply by inserting the locking member from the opening of the holding portion and inserting the inner pipe from the tip of the outer pipe. An inexpensive extension tube can be provided at low cost.

According to the fifth aspect of the present invention, since the cross section of the inner tube is formed in a substantially elliptical shape, the inner tube does not run idle when the inner tube is inserted, and the inner surface of the locking body does not rotate. As a result, there is no displacement between the locking shaft and the recessed portion on the outer side of the inner tube, so that the inner tube can be easily inserted, can be assembled quickly and easily, and an inexpensive and trouble-free extension tube can be provided.

Further, since the short axis direction of the inner tube is arranged in the left-right direction of the extension tube, the extension tube has a small width, can be easily inserted into a gap between furniture, etc., and can be provided with an easy-to-use and high-usability extension tube.

According to the sixth aspect of the present invention, since the cross section of the inner tube is formed substantially in an oval shape, the insertion angle of the inner tube is fixed to one, and the inner surface of the locking body is locked. The shaft and the concave portion on the outer side of the inner tube are not displaced in the rotation direction, the assembling can be easily performed, and an inexpensive extension tube can be provided at a low cost.

Further, according to the invention of claim 7 of the present invention, since the extension pipe and the vacuum cleaner, whose length can be easily adjusted only by pressing the locking body, are combined, the height of the floor surface such as stairs is frequently increased. Very easy to use when cleaning the changing floor.

[Brief description of the drawings]

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

FIG. 2 is an overall view of a vacuum cleaner using the extension pipe.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view of a main part of an extension pipe for a vacuum cleaner showing a first embodiment of the present invention.

FIG. 5 is a view taken in the direction of arrow C in FIG. 1;

FIG. 6 is a sectional view of a main part of an extension pipe for a vacuum cleaner showing a second embodiment of the present invention.

FIG. 7 is a sectional view taken along line BB of FIG. 6;

FIG. 8 is a sectional view of a main part of an extension pipe for a vacuum cleaner showing a second embodiment of the present invention.

FIG. 9 is a sectional view of a main part of an extension pipe for a vacuum cleaner showing a third embodiment of the present invention.

FIG. 10 is a sectional view of a main part of an extension pipe for a vacuum cleaner showing a fourth embodiment of the present invention.

FIG. 11 is a plan view of a main part of the extension pipe.

FIG. 12 is a sectional view of a main part of an extension pipe for a vacuum cleaner showing a fifth embodiment of the present invention.

13 is a sectional view taken along the line CC in FIG.

FIG. 14 is a sectional view of a main part of an extension pipe for a vacuum cleaner showing a sixth embodiment of the present invention.

FIG. 15 is a sectional view taken along the line DD of FIG. 14;

FIG. 16 is an overall view showing a conventional vacuum cleaner.

FIG. 17 is a sectional view of an essential part of the extension pipe for the vacuum cleaner.

18 is a sectional view taken along line EE of FIG. 17;

DESCRIPTION OF SYMBOLS 10 Extension tube 11 Outer tube 12 Inner tube 13 Holder 14 Locking shaft 15 Locking body 16 Urging body 17 Recess 19 Opening

Claims (7)

[Claims] 1. An outer tube having a holding portion, an inner tube freely slidable in the outer tube and provided with a concave portion on a lateral side, and a member having an outer surface of the inner tube rotatably provided in the holding portion. A stopping body, a locking shaft provided on the locking body and locking the recess, and an urging body for biasing the locking shaft toward the concave side; The extension pipe for a vacuum cleaner, wherein when the side is urged inward, the locking body rotates around the outer circumference of the inner pipe, and the locking between the locking shaft and the recess is released. 2. An outer tube having a holding portion, an inner tube slidably in the outer tube and provided with a concave portion on a side surface outward, and moving in the holding portion in a direction orthogonal to an axial direction of the inner tube. A locking body provided so as to be capable of being provided, a locking shaft provided on the locking body for locking in the recess, and an urging body for biasing the locking shaft toward the recess. When the non-locking shaft side is urged inward, the locking body moves in parallel on the outer circumference of the inner tube, and the locking of the locking shaft and the recess is released, so that the extension tube for a vacuum cleaner is released. . 3. The extension tube for a vacuum cleaner according to claim 1, wherein the urging member is formed integrally with the locking member. 4. An outer tube is provided with an opening having substantially the same shape as the cross section of the locking body, and after inserting the locking body through the opening, the inner pipe is passed through the locking body to form the outer pipe. The extension tube for a vacuum cleaner according to any one of claims 1 to 3, wherein the extension tube is inserted into the extension tube. 5. An inner tube having a substantially elliptical cross section, and a longitudinal direction of the cross section of the inner tube is arranged in a vertical direction of the extension tube.
The extension pipe for a vacuum cleaner according to any one of claims 4 to 4. 6. An inner tube having a cross section formed in a substantially oval shape, wherein a longitudinal direction of the inner tube cross section is arranged in a vertical direction of the extension tube.
The extension tube for a vacuum cleaner according to any one of claims 5 to 10. 7. An electric blower for sucking dust, a dust collection chamber for collecting dust, a main body having a suction port communicating with the dust collection chamber, one end connected to the suction port, and the other end connected to the suction port. Items 1 to 6
A vacuum cleaner comprising: a hose connected to the extension pipe for a vacuum cleaner according to any one of the preceding claims; and a suction tool connected to the extension pipe.