JP2000023887A - Extension tube for vacuum cleaner and vacuum cleaner using the same - Google Patents

Abstract

(57) [Summary] [Problem] To extend and retract a telescopic extension pipe, the floor nozzle becomes oblique to the worker during cleaning work, or the extension pipe shrinks, making it extremely difficult to use, and the number of parts is large. There was a problem that it became complicated. An outer tube having a holding portion, and an outer tube.
1, an inner pipe 12 inserted into the inner pipe 1, an opening 14 provided in the holding portion 13, a locking body 17 which is locked through the opening 14 in a plurality of recesses 19 provided in the longitudinal direction of the outer peripheral surface of the inner pipe 12, Inclined part 1 inclined from nozzle side to hose side toward extension tube inward
5 and an urging member 18 for urging the locking member 17 toward the concave portion along the inclined portion 15. Since the locking member 17 locks the concave portion 19 of the inner tube 12 along the inclined portion 15 by the urging force of the urging member 18, the inner tube does not rotate with respect to the outer tube during cleaning, and the floor nozzle does not rotate. Does not become oblique to the worker.

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 A conventional technique 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.

Referring to FIGS. 13 and 14, the outer pipe 1 has a male screw portion 2 and a taper portion A3 at its tip, and the inner pipe 4 can slide inside 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 which abuts on one end of the outer peripheral surface with the taper portion A3 of the outer pipe 1.
It has a part B9.

In the above construction, when the inner pipe 4 is inserted into the outer pipe 1 and the tightening nut 5 is tightened, the tightening nut 5 and the tightening ring 7 are connected to each other by the screwing of the male screw 2 and the female screw 6 with the arrow X. To the taper portion A of the outer pipe 1.
3 tightens the taper portion B9 of the tightening ring 7, the tightening 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. You.

[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 structure, the inner pipe 4 and the outer pipe 1 are not provided.
Is fixed by tightening the tightening ring 7, for example, when the end of the floor nozzle 37 collides with a wall or the like during cleaning when the tightening force is loose, a turning force acts on the extension pipe 34. And
There is a problem that the inner pipe 4 rotates with respect to the outer pipe 1 and the floor nozzle 37 becomes oblique to the operator, or the extension pipe 34 shrinks, making it extremely difficult to use.

To solve the above problem, FIG.
A telescopic extension tube having the configuration shown in FIG. 16 has been put to practical use. In the figure, a telescopic extension tube 50 is composed of an outer pipe 51 and an inner pipe 52 that slides freely in the outer pipe 51, and a rotatable locking body 53 is provided on the outer side of the outer pipe 51. ,
Due to the urging force of the spring A54, the locking shaft 55 at the tip locks the concave portion 56 on the outer side of the inner pipe 52, and the inner pipe 5
2. The extension tube 50 is fixed in the longitudinal direction. When adjusting the length of the extension pipe 50, the pusher 57 on the outer side of the outer pipe 51 is pushed toward the floor nozzle 37 (arrow Y) so that the taper portion C 58 is moved to the end of the locking body 53. When the taper portion D59 is pressed, the locking body 53 rotates in the direction of the arrow Z, and the locking shaft 55 releases the locking to the concave portion 56. When a cleaning operation is performed using the extension tube 50, the push button 57 is urged toward the hose 32 (in the direction opposite to the arrow Y) by the urging force of the spring B60, and the taper portion C58 is actuated. It is configured to be separated from the taper portion D59.

However, the telescopic extension tube 5 constructed as described above
At 0, since the outer pipe 51 and the inner pipe 52 are fixed by mechanical locking, the floor nozzle 37 is not cleaned during the cleaning operation.
However, there is no problem that it becomes oblique to the operator or the extension tube 50 shrinks and becomes very difficult to use. However, the number of parts is large and the structure is complicated. There was a problem that would be.

An object of the present invention is to provide an inexpensive extension pipe and a vacuum cleaner which are easy to use and inexpensive.

[0010]

According to the present invention, there is provided an outer tube having a holding portion, an inner tube inserted into the outer tube, an opening provided in the holding portion, and an opening provided in the holding portion. A locking member that locks in a plurality of recesses provided in the longitudinal direction of the outer peripheral surface of the inner pipe, an inclined section inclined inward from the floor nozzle side toward the hose side from the floor nozzle side, and the engaging section along the inclined section. It is provided with an urging body for urging the stop body toward the concave portion.

According to this configuration, the locking body locks the concave portion of the inner pipe along the inclined portion by the urging force of the urging body, so that the inner pipe rotates with respect to the outer pipe during cleaning. Also, since the floor nozzle does not become oblique to the operator, it is not difficult to use, and when the locking body is moved along the inclined portion against the urging force of the urging body, the concave portion of the inner pipe becomes concave. Can be released, and the telescopic work can be performed only by moving the locking body, so that it is very easy to use.

Further, since the number of parts is reduced, the cost for assembling and parts is low, and a very inexpensive telescopic extension tube can be constructed.

[0013]

According to the first aspect of the present invention, there is provided an outer tube having a holding portion, an inner tube inserted into the outer tube, and provided on the holding portion. An opening, a locking member that locks into a plurality of recesses provided in the longitudinal direction of the outer peripheral surface of the inner pipe through the opening, an inclined section inclined inward from the floor nozzle side toward the hose side toward the extension pipe; According to this configuration, the locking body is configured to bias the inner pipe along the inclined portion by the biasing force of the biasing body. Since the recess is locked, the inner tube does not rotate with respect to the outer tube during cleaning, and the floor nozzle does not become oblique to the operator. By moving along the inclined part against the urging force of the urging body, the locking of the concave part of the inner pipe can be released, so the expansion and contraction work is also involved. Because you can only move the body,
It is very easy to use because the work of turning and loosening nuts for tightening and shrinking can be omitted.

Further, since the number of parts is reduced, the cost for assembling and parts is low, and a very inexpensive telescopic extension tube can be constructed.

In the invention according to claim 2 of the present invention, the urging member is constituted by a resin spring integrated with the locking member, and the number of parts is smaller than when a separate spring or the like is used. Since the number of parts is reduced, the cost of parts and assembly is low, and there is no problem such as detachment of the spring.

According to a third aspect of the present invention, a bent portion is provided at an end of the opening on the hose side, and the bent portion is bent inward or outward, and the bent portion comes into contact with the end surface of the locking member. Since the inner tube and outer tube are fixed by mechanical locking of the locking shaft and the bent portion is in contact with the end surface of the locking member, the floor nozzle collides with a wall or the like during the cleaning operation and becomes excessively large. Even when a strong impact force is applied, the bent portion backs up to prevent the movement of the locking body, so that the problem that the inner tube enters the outer tube is eliminated.

According to a fourth aspect of the present invention, a rib is provided at the end of the opening on the hose side to contact the end face of the locking member, and the inner pipe and the outer pipe have a locking shaft. The ribs are in contact with the end surface of the locking body, so that even if the floor nozzle collides with a wall or the like during the cleaning operation and an excessive impact force is applied, the ribs can be engaged. Since the backup is performed to prevent the movement of the stationary body, the problem that the inner tube enters the outer tube is eliminated.

According to a fifth 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 4, and a suction tool connected to the extension pipe. Yes, during cleaning work with this vacuum cleaner, the length of the extension tube can be adjusted only by pushing the locking member of the extension tube forward, so it is extremely useful even when the height of the floor surface such as stairs changes frequently. It is easy to change the length,
In addition, since the inner and outer pipes of the extension pipe are fixed by mechanical locking, even if the suction tool collides with a wall or the like during cleaning work, there is no problem that the extension pipe shrinks and it is very easy to use. .

[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. In the drawing, 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 a hand operating section 33 provided on the other end side is used for the above operation. The operation of the electric blower in the cleaner main body 30 is controlled.

An extendable extension tube 10 is connected to the hand operation unit 33, and the extension tube 10 is connected to the hand operation unit 33.
And an inner tube 12 that is inserted into the outer tube 11 so as to be movable in the axial direction.
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 the drawing, reference numeral 10 denotes an extension tube, which is composed of an outer tube 11 and an inner tube 12 which slides freely in the outer tube 11, and holds a later-described locking member 17 at the tip of the outer tube 11. A holding unit 13 is provided.
A part of the holding part 13 is provided with an opening 14 facing a plurality of recesses 19 formed in the longitudinal direction of the outer peripheral surface of the inner tube 12, and the locking body 17 is located in the opening 14. One end is connected to the floor nozzle 37 side of the opening, and the other end is
And a slope 15 connected thereto.
Is inclined inwardly of the extension tube 10 in accordance with the hose 32 side. A locking member 17 slidably holds the tip end of the inclined portion 15, that is, the other end, and a concave portion of the inner tube 12 is provided on an inner surface of the locking member 17 facing the inner tube 12. A lock shaft 16 that fits and locks the lock shaft 19 is provided. The locking shaft 16 locks the concave portion 19 of the inner tube 12 by the urging force of the urging body 18 provided at the tip of the inclined portion 15, and fixes the inner tube 12 in the longitudinal direction of the extension tube 10. Do. When no external force acts on the extension pipe 10, the locking shaft 16 locks the concave portion 19 and fixes the inner pipe 12 and the outer pipe 11 in the direction of expansion and contraction and twist. Is slid along the inclined nozzle 15 toward the floor nozzle 37, that is, when slid in the direction of arrow B, the locking shaft 16 releases the locking with the concave portion 19.

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 16 of the locking body 17 is engaged with the concave portion 19 by the urging force of the urging body 18, and the side surface of the locking body 17 on the hose side is further moved. Since the outer tube 11 and the inner tube 12 are securely fixed in the expansion / contraction direction and the torsion direction because they are in contact with the side of the opening 14 on the hose side, even when the floor nozzle 37 collides with the wall,
Even when the extension pipe 10 shrinks or when the end of the floor nozzle 37 collides with a wall, there is no problem such as the floor nozzle 37 being inclined due to the twist of the extension pipe 10. Further, even when a force for pulling the inner tube 12 is applied, the locking portion 1
Since 7 does not slide, there is no problem such as the extension pipe 10 being elongated. Also, when adjusting the length of the extension tube 10, by sliding the locking body 17 along the inclined portion 15 toward the floor nozzle 37, the locking shaft 16 and the locking shaft 16 are adjusted. Since the locking of the concave portion 19 is released, the length of expansion and contraction of the inner tube 12 and the outer tube 11 can be easily adjusted.

Since the number of parts is further reduced, the assembly and parts costs are low, and the telescopic extension tube 10 is very inexpensive.
Can be configured.

In this embodiment, the side surface on the hose side of the locking member 17 is in contact with the side portion of the opening 14 on the hose side, so that the floor nozzle 37 is strongly collided with the wall. Although the movement of the locking member 17 is also prevented by the side of the opening 14, the contraction of the extension tube 10 can be sufficiently prevented by locking only the urging force by the urging member 18.

(Embodiment 2) Next, 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.

In FIGS. 6 and 7, the urging member 18 is connected to the locking member 1.
7 is formed of a resin spring integrated therewith.

Next, the operation and operation of the embodiment will be described. In the configuration of the extension tube 10, the urging member 18
Are formed integrally with the locking member 17, 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 3) Next, a third 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.

8 and 9, a hose 32 of the opening 14 is shown.
The bent portion 20 is provided on the side, and when the locking shaft 16 of the locking body 17 is engaged with the concave portion 19, the locking body 17 comes into contact with the bent portion 20 and when a strong load is applied. Also, the locking body 17 is configured not to move to the hose 32 side.

Next, the operation and operation of the embodiment will be described. When performing a cleaning operation using the extension tube 10, even when the floor nozzle 37 is strongly collided with a wall, the bent portion 20 strongly backs up to prevent the movement of the locking body 17, There is no problem that the inner pipe 12 enters the outer pipe 11 and the extension pipe 10 shrinks without the locking body 17 being moved by the impact.

(Embodiment 4) Next, a fourth 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.

10 and 11, a rib 21 is provided on the hose 32 side of the opening 14, and the locking shaft 16 of the locking body 17 is provided.
When the engaging member 17 is engaged with the concave portion 19, the engaging member 17 comes into contact with the rib 21 so that the engaging member 17 does not move to the hose 32 side even when a strong load is applied. Have been.

Next, the operation and operation of the embodiment will be described. When the cleaning operation is performed using the extension pipe 10, even when the floor nozzle 37 strongly collides with the wall, the rib 21 strongly backs up to prevent the movement of the locking body 17, so that the As a result, the inner pipe 12 enters the outer pipe 11 without the locking body 17 moving,
The problem that the extension tube 10 shrinks does not occur.

(Embodiment 5) Next, a fifth embodiment will be described with reference to FIG.
It will be explained together. 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 it 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 configuration of this embodiment will be described. When performing the cleaning operation with the present vacuum cleaner, the length of the extension pipe 10 can be adjusted only by sliding the locking body 17 of the extension pipe 10 toward the floor nozzle 37 along the inclined portion 15, Even when the height of the floor surface such as stairs changes frequently, the length is very easy to change, and the inner pipe 12 and the outer pipe 11 of the extension pipe 10 are fixed by mechanical locking, so that cleaning work is performed. Even when the floor nozzle 37 collides against a wall or the like, there is no problem such as the extension tube 10 shrinking, so that it is very easy to use.

[0037]

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 concave portion of the inner pipe, so that the inner pipe is not connected to the outer pipe. Because the floor nozzle does not rotate with respect to the pipe and the floor nozzle does not become oblique to the operator, it is easy to use, and the expansion and contraction work can be performed simply by sliding the locking body along the inclined part toward the floor nozzle. In addition, the locking shaft releases the locking to the concave portion of the inner tube, so that it is very easy to use.

Further, since the number of parts is reduced, the cost of assembling and parts is low, and a very inexpensive telescopic extension pipe can be provided.

According to the second aspect of the present invention, since the urging member is formed integrally with the locking member, the number of components of the extension tube is small, the extension tube can be easily assembled, and the inexpensive extension tube without failure can be provided. Can be provided.

According to the third aspect of the present invention, the hood of the opening is provided.
When the floor nozzle is strongly collided with the wall, the locking body does not move even when the floor nozzle is strongly hit against the wall, the locking shaft and the concave part are disengaged, and the extension pipe shrinks. Because there is no
Very easy to use.

According to the fourth aspect of the present invention, the opening hole
When the floor nozzle is strongly impacted against the wall, the locking body does not move even when the floor nozzle is strongly hit against the wall, and the locking shaft and the concave part are disengaged and the extension pipe shrinks. Not very easy to use.

According to the fifth aspect of the present invention, since the extension pipe and the vacuum cleaner, whose length can be easily adjusted only by sliding the locking body along the inclined portion toward the floor nozzle, are combined, the stairs and the like are provided. Very easy to use when cleaning floors where the height of the floor changes frequently.

[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 plan view of a main part of the extension pipe.

FIG. 5 is a sectional view of a main part when the locking body of the extension tube is slid.

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 plan view of a main part of the extension pipe.

FIG. 8 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. 9 is a plan view of a main part of the extension pipe.

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 an overall view showing a conventional vacuum cleaner.

FIG. 13 is a sectional view showing a main part of the extension pipe for the vacuum cleaner.

FIG. 14 is a sectional view taken along the line DD in FIG. 13;

FIG. 15 is a sectional view showing a main part of a second conventional extension pipe for a vacuum cleaner.

FIG. 16 is a sectional view of a main part when the locking body of the extension pipe is rotated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Extension pipe 11 Outer pipe 12 Inner pipe 13 Holding part 14 Opening 15 Inclined part 17 Locking body 18 Urging body 19 Depression 20 Bent part 21 Rib

Claims (5)

[Claims] 1. An outer tube having a holding portion, an inner tube inserted into the outer tube, an opening provided in the holding portion, and a plurality of concave portions provided in a longitudinal direction of an outer peripheral surface of the inner tube through the opening. A locking body for locking, an inclined portion inclined inward from the floor nozzle side toward the extension tube inward from the hose side, and an urging body for urging the locking body toward the concave portion along the inclined portion. Extension tube for vacuum cleaner. 2. The extension tube for a vacuum cleaner according to claim 1, wherein the urging member is formed of a resin spring integrated with the locking member. 3. The vacuum cleaner according to claim 1, wherein a bent portion is provided at an end of the opening on the hose side, the bent portion being bent inward or outward, and the bent portion comes into contact with an end surface of the locking body. Extension tube. 4. The extension pipe for a vacuum cleaner according to claim 1, wherein a rib is provided at an end of the opening on the hose side, the rib being in contact with an end face of the locking body. 5. 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 1-4
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.