JPH1119012A - Telescopic extension tube for vacuum cleaner - Google Patents

Abstract

(57) [Problem] An object of the present invention is to provide a telescopic extension tube in which an inner peripheral surface of a telescopic part is hardly damaged, has little adhesion of dust, and has excellent durability. An extension pipe (14) includes an outer pipe (15) connected to a floor nozzle (13), an inner pipe (16) connected to a hand handle (12),
Locking body 1 for fixing outer tube 15 and inner tube 16 at arbitrary positions
The locking member 17 fixes the inner tube 16 by inserting pins and the like into a plurality of recesses 19 formed on the outer peripheral surface of the inner tube 16, and releases the pin by operating the button 20. Extension tube 1
4 The length can be adjusted. The outer diameter of the inner tube 16 connected to the handle 12 is smaller than the inner diameter of the outer tube 15 connected to the floor nozzle 13. When the extension tube 14 expands and contracts, the outer circumference of the inner tube 16 and the inner circumference of the outer tube 15 slide. I do.

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 of a vacuum cleaner.

[0002]

2. Description of the Related Art An extension tube of a telescopic vacuum cleaner of this kind has been disclosed, for example, in Japanese Patent Publication No. 61-49797. These are shown in FIGS. 6 and 7 below. That is, a hand handle 2 is provided at the other end of the hose 1 connected to the main body of the vacuum cleaner, and the floor nozzle 3 and the hand handle 2 are connected by an extension pipe 4 serving as an intake passage. Is composed of a nozzle connection pipe 5 connected to the floor nozzle and a handle connection pipe 6 connected to the handle 2 at hand, and the nozzle connection pipe 5 and the handle connection pipe 6 are connected to a tightening ring attached to the handle connection pipe 6 side. 7, it was fixed at an arbitrary position, and the length of the extension tube 4 was adjusted. The nozzle connection pipe 5 had a smaller diameter than the handle connection pipe 6 and slid on the inner surface of the handle connection pipe.

[0003]

However, in such a conventional structure, the nozzle connecting pipe 5 connected to the floor nozzle 3 by moving the floor nozzle 3 back and forth in the cleaning operation.
It easily hits the corners and pillars of the furniture, and the surface of the nozzle connection pipe 5 is scratched, and dirt and the like easily adhere. Next, when the extension pipe 4 is contracted, the nozzle connection pipe 5 is slid into the inner surface side of the handle connection pipe 6 with the surface of the nozzle connection pipe 5 being scratched or dusty. The sliding surface between the handle connection pipe 5 and the handle connection pipe 6 is scratched, the extension pipe 4 is hardly expanded and contracted, and air leaks from the fitting surface between the nozzle connection pipe 5 and the handle connection pipe 6 serving as an air passage. The performance of sucking garbage becomes worse. Further, when adjusting the length of the extension pipe 4, the tightening ring 7 provided at substantially the center of the extension pipe 4 must be operated. There were problems such as difficulty.

An object of the present invention is to solve the above-mentioned problems, and it is a first object of the present invention to provide a telescopic extension tube which is hardly damaged on the inner peripheral surface of the extension tube, has little adhesion of dust, and has excellent durability. .

Another object of the present invention is to provide a configuration in which the extension and contraction operation of the extension tube can be easily performed by one operation.

A third object of the present invention is to provide a structure in which the length of the extension tube can be easily adjusted in the vicinity of the handle in accordance with the preference of the user.

It is a fourth object of the present invention to provide a configuration which can effectively utilize the extension and contraction range of the extension tube for a long time.

[0008]

In order to achieve the first object, according to the present invention, an extension pipe connected between a floor nozzle and a hand handle includes an outer pipe connected to the floor nozzle and a hand handle. It consists of an inner pipe to be connected, and a locking body that fixes the outer pipe and the inner pipe at arbitrary positions.The diameter of the outer pipe connected to the floor nozzle is larger than the inner pipe, and the inner pipe is inside the outer pipe. It is configured to slide in. The second, third, and fourth objects can be achieved on the premise of means for achieving the first object.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be easily implemented by the embodiments described in the claims. That is, as in the first aspect of the present invention, the diameter of the outer pipe connected to the floor nozzle is made larger than that of the inner pipe so that the inner pipe enters and slides in the outer pipe. If the outer tube connected to the floor nozzle hits the corners or pillars of the furniture when the outer tube is moved, and the outer surface of the outer tube is scratched, the scratch will become an air passage and the fitting surface between the outer tube and the inner tube It does not cause air leakage without affecting the air conditioner, so that the vacuum cleaner can maintain the ability to suck in dust. Also, even if the outer surface of the outer tube is scratched and the extension tube is shrunk while dust is attached, the inner tube connected to the handle at hand fits into the inner periphery of the outer tube connected to the floor nozzle. Even if the extension tube is repeatedly expanded and contracted, the sliding surface between the outer tube and the inner tube is not damaged, so that the extension tube does not become difficult to expand and contract, and the outer tube and the inner tube serve as air passages. There is no possibility that air leaks from the fitting surface of the vacuum cleaner and the performance of sucking dust of the vacuum cleaner is deteriorated.

Further, as in the second aspect of the present invention, a connecting pipe having a lock mechanism for holding and fixing the outer pipe is attached to the connecting side of the inner pipe constituting the extension pipe with the handle at hand, and the outer pipe is provided. When the lock mechanism is released when cleaning is started, the outer diameter of the outer pipe is larger than that of the inner pipe. The tube moves downward and the extension tube extends to the normal use length, and the outer tube and the inner tube are fixed by the locking body at this length. Easy to do.

Further, the length of the inner pipe and the connecting pipe can be arbitrarily set in a state in which the lock mechanism for holding and fixing the outer pipe provided on the connecting pipe is released, as in the third aspect of the present invention. Easy to clean by adjusting the length of the normal extension tube by operating the operation button provided near the handle by adjusting the operation button provided. Work can be done.

According to a fourth aspect of the present invention, a lock mechanism for holding and fixing the outer tube is provided on the extension tube connecting side of the hand handle, and a receiving portion of the lock mechanism is provided on a stopper of the outer tube. As a result, the lock mechanism can be released near the grip portion of the hand handle, the outer tube moves downward due to the weight of the outer tube and the floor nozzle, and the extension tube extends to a normal use length, The extension and contraction operation of the extension tube can be easily performed with a single handle in one operation. Further, since the lock mechanism is formed on the handle at hand, the extension tube can be effectively used for a long time without shortening the range of expansion and contraction.

[0013]

【Example】

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 11 denotes a hose having one end connected to the main body (not shown) of the vacuum cleaner, and a handle at the other end which forms a grip portion having a built-in control circuit for controlling the operation of the vacuum cleaner. 12 and floor nozzle 13
The handle 12 is connected to the handle 12 by an extension pipe 14 serving as an intake passage. The extension pipe 14 includes an outer pipe 15 formed of a resin or a metal material connected to the floor nozzle 13, an inner pipe 16 formed of a resin or a metal material connected to the hand handle 12, and an outer pipe 15 and an inner pipe. And a locking member 17 for fixing the extension tube 14 to an arbitrary position, a holding member 18 is fastened to the outer tube 15, and the holding member 18 is inserted into a concave portion formed in the main body to hold the extension tube 14 in the main body. .

The locking member 17 has a function of inserting a metal pin or the like into a plurality of recesses 19 formed on the outer peripheral surface of the inner tube 16 to fix the inner tube 16. The fixing can be released and the length of the extension tube 14 can be adjusted. The outer diameter of the inner tube 16 connected to the handle 12 is smaller than the inner diameter of the outer tube 15 connected to the floor nozzle 13. When the extension tube 14 expands and contracts, the outer circumference of the inner tube 16 and the inner circumference of the outer tube 15 slide. doing.

The operation of the above configuration is as follows.
By moving the floor nozzle 13 back and forth in the cleaning operation, the outer tube 15 connected to the floor nozzle 13 hits a corner or a pillar of furniture, and the outer surface of the outer tube is damaged. However, since the outer circumference of the inner pipe 16 and the inner circumference of the outer pipe 15 are fitted, there is no effect on the fitting surface between the outer pipe 15 and the inner pipe 16 which serves as an air passage, no air leakage occurs, and the cleaner main body does not. The ability to suck in garbage can be maintained. Further, even if the outer surface of the outer tube 15 is damaged and the extension tube 14 is shrunk while dust and the like are adhered, the outer tube 1
Since the inner pipe 16 is fitted into the inner circumference of the pipe 5, the repeatedly extended pipe 1
4 does not damage the sliding surface even if it expands and contracts.
4 does not become difficult to expand and contract.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIGS. The first embodiment
The same components as those described above are denoted by the same reference numerals, and detailed description is omitted. 2 and 3, reference numeral 21 denotes a hand handle 24 which forms one end of an inner tube 23 which constitutes the extension tube 22.
The connection pipe attached to the connection side with
Is formed with a lock mechanism 26 for holding the end of the outer tube 25 on the inner tube 23 side. On the outer tube 25 side, receiving portions 27 of the lock mechanism 26 forming a pair of the lock mechanism 26 are provided. As an example of the lock mechanism 26, a buckle 29 is provided inside the connection pipe 21 so as to be rotatable around a shaft 28, and this buckle 29 has one end protruding from the outer surface of the connection pipe 21, and is fitted with the multi-end receiving portion 27. And the locking member 3 attached to the outer tube 25 side
0 is held and fixed to the connection pipe 21.

When the lock mechanism 26 is released by pushing the buckle 29, the outer tube 25 moves in the direction of the floor surface by the weight of the floor nozzle 31 and extends to a certain length of the extension tube 22. It is fixed and held by the stopper 30. The configuration of this fixed holding is the same as the configuration described in the above embodiment.

The operation of the above configuration is as follows.
When cleaning is started, the buckle 29 provided on the connection pipe 21 is pressed to release the lock mechanism 26. Then, the outer tube 25 moves in the floor direction by its own weight with the floor nozzle 31 added thereto, and is fixed and held by the locking body 30 in a state of extending to a certain length of the extension tube 22. The operation of releasing the mechanism 26 allows the extension tube to be easily extended and retracted.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. The same reference numerals are given to the same components as those in the above-described embodiment, and the detailed description is omitted. Reference numeral 32 denotes an operation button attached to the connection pipe 21, which is held at a fixed position by a spring 33. When the operation button 32 is moved in the direction of the arrow with the lock mechanism 26 released, the pin 35 that fits into the recess 34 formed in the inner tube 23 and fixes the connection tube 21 and the inner tube 23 moves upward. And the lock is released. This concave portion 34 is
3 are formed on the outer peripheral surface.

The operation of the above configuration is as follows.
When cleaning is started, the buckle 29 provided on the connection pipe 21 is pushed to release the lock mechanism 26 and the extension pipe 22 is stretched to be fixedly held by the locking body 30. At this time, the extension pipe 22
For those who are difficult to clean with the normal length,
By operating the operation button 32 provided in the vicinity of the
By fitting a pin 35 into an arbitrary concave portion 34 formed in 3, the fitting length between the connection pipe 21 and the inner pipe 23 can be adjusted according to the user. Therefore, easy cleaning work suitable for the user can be performed.

(Embodiment 4) Next, Embodiment 4 of the present invention will be described with reference to the drawings. In FIG. 5, reference numeral 36 denotes a lock mechanism for holding an outer tube 38 formed at the tip of the handle 37 at hand. The outer tube 38 is provided with a receiving portion 39 of a pair of the lock mechanisms 36. An example of the lock mechanism 36 has the same configuration as that described in the second embodiment.

The operation of the above configuration is as follows.
When cleaning is started, the lock mechanism 36 provided on the hand handle 37 is released. Then, the outer tube 38 slides on the outer surface of the inner tube 41 by its own weight with the floor nozzle 40 added thereto, moves in the direction of the floor surface, and is extended by a predetermined length of the extension tube 42 by the locking member 43. Once fixed, the lock mechanism 3
6 can be easily operated to extend and retract the extension tube 42. In addition, since the lock mechanism 36 is configured on the handle 37 at hand, the extension length L3 of the extension tube is compared with L1 in FIG. 2 in which the lock mechanism shown in the second embodiment is provided on the connection pipe, and L3 = Since the length can be lengthened to L1 + (L2 / 2), it can be effectively used without shortening the expansion / contraction range of the extension tube 42.

[0023]

As is apparent from the above description, according to the first aspect of the present invention, by moving the floor nozzle back and forth during the cleaning operation, the outer pipe connected to the floor nozzle can be used as the corner of furniture or the like. Even if the outer surface of the outer tube is scratched by hitting a pillar, etc., the outer surface of the inner tube is fitted to the inner periphery of the outer tube, which may affect the fitting surface between the outer tube and the inner tube that constitute the air passage. There is no air leakage, and the vacuum cleaner can maintain its ability to suck in dust. Also, even if the outer surface of the outer tube is scratched and the extension tube is shrunk with dusts and the like adhered, the inner tube fits on the inner periphery of the outer tube. The sliding surface between the pipe and the inner pipe is not damaged, and the extension pipe does not easily expand and contract.

According to the second aspect of the present invention, when cleaning is started, when the buckle provided on the connecting pipe is pressed to release the lock mechanism, the outer pipe moves in the direction of the floor surface due to its own weight with the floor nozzle. The extension tube is fixed and held in a state of being extended to a certain length of the extension tube, so that the extension and contraction operation of the extension tube can be easily performed by one operation of releasing the lock mechanism.

According to the third aspect of the present invention, the locking mechanism is released and the extension tube is fixed and held in a state where the extension tube is extended. By operating the operation button provided in the vicinity of the handle at hand, the fitting length between the connection pipe and the inner pipe can be adjusted according to the user. Therefore, easy cleaning work suitable for the user can be performed.

According to the invention described in claim 4 of the present invention, since the lock mechanism is formed on the handle at hand, the length of expansion and contraction of the telescopic extension tube can be made longer than when the lock mechanism is formed on the connecting pipe. It can be used effectively without shortening the extension and contraction range of the extension pipe, and cleaning can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a side view of a telescopic extension tube according to a first embodiment of the present invention.

FIG. 2 is a side view of a telescopic extension tube according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part of the same.

FIG. 4 is a sectional view of an essential part of a telescopic extension tube according to a third embodiment of the present invention.

FIG. 5 is a side view of a telescopic extension tube according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view of an external appearance of a vacuum cleaner showing a conventional example.

FIG. 7 is a sectional view of an essential part of the telescopic extension tube.

[Explanation of symbols]

 12, 24, 37 Hand handle 13, 31, 40 Floor nozzle 14, 22, 42 Extension tube 15, 25, 38 Outer tube 16, 23, 41 Inner tube 17, 30, 43 Locking body 20 Button 21 Connection tube 26, 36 Lock mechanism 27, 39 Receiving part 32 Operation button

Claims (4)

[Claims] 1. A handle connected to a hose connected to a main body of a vacuum cleaner, and a floor nozzle connected to an extension pipe serving as an intake passage, and the extension pipe is connected to a floor nozzle. And an inner tube connected to the handle, and a locking member for fixing the fitting between the outer tube and the inner tube at an arbitrary position, wherein the inner tube has a smaller diameter than the outer tube and has a smaller diameter than the outer tube. A telescopic extension tube of a vacuum cleaner in which the inner surface slides on the outer surface of the inner tube. 2. A locking mechanism is provided on a connecting pipe provided at an end of an inner pipe on a handle handle side, and a locking body having a receiving portion of the locking mechanism is provided on an outer pipe at an end opposite to a nozzle. Provided,
When the connection between the lock mechanism and the receiving portion is released, the outer tube moves downward by the own weight of the outer tube itself and the weight of the floor nozzle and extends to the length of the extension tube, and the outer tube and the inner tube are The telescopic extension tube of a vacuum cleaner according to claim 1, wherein the extension tube is configured to be fixed by the locking body at a position in an extended state. 3. An operation button is attached to a connection pipe provided at an end of the inner pipe on the handle handle side, and when the connection between the lock mechanism and the receiving portion of the locking body is released, the operation button is operated. ,
The telescopic extension tube of a vacuum cleaner according to claim 2, wherein a connecting position between the connection tube and the inner tube is shifted to change a length dimension of the connection tube and the inner tube. 4. A lock mechanism for holding and fixing a locking portion of an outer tube is provided on an extension pipe connecting side of a hand handle, and a receiving portion of the locking mechanism is provided on the locking body of the outer tube. When the connection between the outer tube and the receiving portion is released, the outer tube moves downward by the own weight of the outer tube itself and the weight of the floor nozzle and extends to the length of the extension tube. The telescopic extension tube according to claim 1, wherein the extension tube is configured to be fixed by the locking body in a position where the extension member is in a state of being folded.