JPH08308775A - Vacuum cleaner - Google Patents

Abstract

PURPOSE: To prevent a lead wire inside an extension pipe from being damaged and to prevent cleaning work from being disturbed with the lead wire, concerning a vacuum cleaner provided with the extension pipe which is freely stretched and has the lead wire inside. CONSTITUTION: A lead wire 108 is arranged in an inner pipe side housing part and an outer pipe housing part, a space 112 for housing a section 108b of the lead wire 108 to be stretched is formed inside the housing part and, when an inner pipe 106 is moved inside an outer pipe 105, the stretch section 108b of the lead wire 108 is stretched. A recessed part 115 is provided at one part of the outer peripheral surface of the inner pipe 106 confronted with the housing part, a lock body 117 to get into the recessed part 115 is provided on the side of the outer pipe 105, and the inner pipe 106 is regulated from moving inside the outer pipe 105. Even when the recessed part 115 regulated by the lock body 117 receives any power, the power is not directly operated upon the housing part and the damage to the housing part and the disconnection of the lead wire 108 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner provided with an extension tube that connects a hose and a floor nozzle and is extendable and has a conductive wire inside.

[0002]

2. Description of the Related Art An extension tube of a conventional electric vacuum cleaner is actually opened in Sho 61.
There is a structure disclosed in Japanese Patent Publication No. 164649. The structure of this extension pipe will be described with reference to FIGS. In the figure, reference numeral 3 denotes an extendable extension tube composed of an inner tube 4 and an outer tube 5. Reference numeral 9 is an extension cord having plugs 10 and 11 at both ends. One plug 10 is connected to a connecting part of a suction tool, and the other plug 11 is connected to a connecting part of a hand switch part, so that the suction tool side and the cleaner are connected. It is electrically connected to the main body side via the hand switch part and has a function as a conductive wire. The extension cord 9 is provided with a coil portion 9a by curling, and the coil portion 9a is always in a contracted state and is extended by an external force.
12 is a cord clip attached to the inner pipe 4, 13 is an outer pipe 5.
Is an integral or separate cord clip, and the extension cord 9 is supported by the inner and outer pipes 4 and 5 by locking and holding both ends of the extension cord 9 with the coil portion 9a as a boundary. To be done.

In the above structure, the extension pipe 3 is normally stored and stored with the inner and outer pipes 4 and 5 contracted as shown in FIG. 5, and at this time, the coil portion 9 of the extension cord 9 is stored.
a is located along the extension tube in a contracted state. Next, when the extension tube 3 is used, the lock button 14 is operated and the extension button 3 shown in FIG.
The inner and outer tubes 4 and 5 are extended as shown in FIG. 3, and at this time, the coil portion 9a of the extension cord 9 is also extended. In this way, the extension cord 9 is extended depending on the extension / contraction state of the extension tube 3.
Was configured to expand and contract.

[0004]

However, in the conventional structure, the extension cord 9 is attached to the outer peripheral side of the extension pipe 3 in a state of being exposed, so that the extension cord 9 is easily caught by an object during the cleaning work, and the extension cord 9 is easily cleaned. Workability was poor. Further, an external force is applied to the extension cord 9, which causes a problem in durability of the extension cord 9. Further, the lock button 14 locks the outer tube 4 and the inner tube 5 so that the expanded and contracted length of the extension tube 3 can be maintained. However, the extension cord 9 has a locking portion where the lock button 14 is located. Since it is attached to the cord clip 13 that has passed, the exposed portion of the extension cord 9 becomes longer, and it is easier to get caught on an object. The reason is that when the extension cord 9 is attached to the locking portion, the force from the inner pipe 5 acts on the locking portion, so that the extension cord 9 is fixed from this portion in order to shorten the length of the extension cord 9. If this happens, the disconnection or the like becomes a problem. As described above, the extension pipe that makes it difficult for the extension cord to be caught by an object while considering the disconnection of the extension cord 9 has not been provided.

In view of the above problems, the present invention is provided with a mechanism that does not impair cleaning workability, enhances the durability of the conductive wire against the extension / contraction operation of the extension tube, and can maintain the extension / contraction length of the extension tube. An object of the present invention is to provide an electric vacuum cleaner capable of preventing breakage of conductive wires and the like.

[0006]

In order to achieve the above object, the present invention provides an extension tube, an outer tube having an outer tube side housing portion for housing a part of a conductive wire, and an axial direction inside the outer tube. It is movable and is composed of an inner pipe provided with an inner pipe side storage portion for storing a part of the conductive wire, and a part of the conductive wire is made expandable and contractible, and the outer periphery of the inner pipe other than the inner pipe side storage portion is A part is formed with a plurality of recesses at intervals along the axial direction, and a restricting body that engages with the plurality of recesses of the inner pipe and restricts the movement of the inner pipe is provided on the outer pipe side. However, if the inner tube is moved inside the outer tube to expand and contract the extension tube, part of the conductive wire expands and contracts due to the movement, and it is possible to prevent excessive force from being applied to the conductive wire due to the extension tube expansion and contraction operation. , Its durability can be improved, and the conductive wire is arranged in each housing, so that the conductive wire is There can also be prevented being caught on things. Furthermore, by adjusting and maintaining the length of the extension pipe, that is, by arranging the position of the recess and the restricting body for restricting the axial movement of the inner pipe in a portion where there is no storage portion, the restriction body adds to the recess. The force can be received by the outer wall of the inner tube other than the storage portion, and it is possible to prevent a large force from being applied to the storage portion and damaging the conductive wire inside.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
A cleaner main body, a hose whose one end side is connected to the cleaner main body, and an extension pipe connecting the other end side of this hose and the floor nozzle are provided, and the extension pipe is an outer pipe and an axis inside the outer pipe. The inner pipe movably arranged in the axial direction, the inner pipe side storage portion arranged in the axial direction of the inner pipe for storing the conductive wire, and the outer pipe side storage portion arranged in the axial direction of the outer pipe for storing the conductive wire. And a part of the outer circumference of the inner pipe facing the inner pipe side storage part, and a plurality of recesses are formed at intervals along the axial direction. Then, the outer pipe side is provided with a restricting body that engages with a plurality of recesses of the inner pipe and restricts movement of the inner pipe. When the inner pipe is moved within the outer pipe to extend and contract the extension pipe, A part of the conductive wire in the storage portion expands and contracts, and the length of the conductive wire can be changed according to the expansion and contraction operation of the extension tube. In addition, since the conductive wire is disposed inside the storage portion, it is not exposed to the outside of the pipe, and it is possible to prevent the conductive wire from being caught during cleaning work. Further, in order to adjust the length of the extension pipe, a plurality of recesses are provided on the inner pipe, and regulators that fit into the recesses are provided on the outer pipe side. As a result, it is possible to prevent the force received from the regulator from being directly applied to the storage portion, and prevent damage to the storage portion or disconnection of the conductive wire in the storage portion.

The invention according to claim 2 of the present invention is the invention according to claim 1.
The restricting body in is composed of a locking body that fits in the recess and a retainer that presses the locking body inside the recess. When the pressing force from the retainer is released, the restricting body is released from the recess by its own weight. With the body arranged, if you operate the pressing tool to release the pressing force of the pressing tool, the locking body that was stuck in the recess will come out of the recess due to its own weight, so when moving the inner tube The engagement body is less likely to rub against the inner pipe, the friction noise is reduced, and the operation force for moving the inner pipe can be reduced.

The invention according to claim 3 of the present invention is the invention according to claim 1.
A protrusion or groove extending in the axial direction is formed on a part of the outer peripheral side of the inner tube, and a guide portion is formed on the inner peripheral side of the outer tube for guiding the protrusion or groove of the inner tube in the axial direction. The protrusion or groove and the guide portion constitute a rotation preventing mechanism for preventing the inner pipe from rotating with respect to the outer pipe, and the protrusion or groove formed on a part of the outer peripheral side of the inner pipe, The guide portion provided on the inner peripheral side of the outer pipe can be moved in the axial direction, and the protrusion or the groove portion and the guide portion prevent the inner pipe from rotating with respect to the outer pipe. Therefore, the inner tube can be moved in the outer tube without the twisting force acting on the conductive wire in the housing portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the overall structure of the vacuum cleaner will be described with reference to FIG. As shown in the drawing, an end of a hose 102 is connected to a suction port of a cleaner body 101 having a built-in electric blower, and an electric blower inside the cleaner body 101 is connected by a hand operation unit 103 provided on the other end side of the hose 102. Operate driving etc. A conductive wire is arranged in the hose 102 to electrically connect the hand operation unit 103 and the cleaner body 101.

An extension tube 1 which is freely extendable and retractable in the hand operation section 103
As shown in FIG. 4, the extension pipe 104 is connected to the outer pipe 105 and the inner pipe 106 inserted into the outer pipe 105 so as to be movable in the axial direction.
The inner tube 106 is connected to a floor nozzle 107 having a built-in electric brush. A conductive wire is also arranged in the extension pipe 104 in the axial direction so that the hand operation unit 103 can be connected to the floor nozzle 10.
It is configured to supply electric power to the electric brush No. 7.

A connecting portion 1 connected to the hand operating portion 103 side
A terminal 105c for electrical connection is provided on the 05a side, and is electrically connected to a conductive wire in the outer tube side storage portion 105b extending in the axial direction of the outer tube 105. Further, the connecting portion 106a of the inner pipe 106 is provided with a terminal (not shown) that is electrically connected to the floor nozzle 107, and inside the inner pipe-side storage portion 106b extending in the axial direction of the inner pipe 106. The conductive wire is the connecting portion 10.
It is electrically connected to the terminal 6a. As described above, electric power is supplied between the hand operation unit and the floor nozzle by the conductive wire arranged in the extension pipe 104. However, this conductive wire is used between the hand operation unit 103 and the floor nozzle 107 in addition to the power supply. It can also be used as a signal line.

Next, the detailed structure of the extension pipe is shown in FIGS.
This will be described below. A conductive wire 108 is arranged in the axial direction on a part of the outer peripheral surface of the inner tube 106. The outer peripheral side of the conductive wire 108 is covered with a protective cover 109. That is,
In this embodiment, the inner pipe side storage portion 106b is covered with the protective cover 109.
It consists of. The protective cover 109 projects in the outer peripheral direction of the inner pipe 106 and extends in the direction in which the conductive wire 108 is arranged, that is, in the axial direction of the inner pipe 106. An opening 110 for leading out the conductive wire 108 is provided on the upper surface of the end of the protective cover 109. The conductive wire 108 led out from the opening 110 is introduced into the space 112 from the opening 111 opened on the upper surface of the outer tube 105 on the end E side.
The conductive wire 108 in the space 112 has a stretchable portion 108.
b is provided. Specifically, a lead wire is used as the conductive wire 108, and a part of this lead wire is spirally wound, that is, a stretchable part 108b is formed.

Further, an outer tube side storage portion 105b is provided from the space portion 112 toward the connection portion 105a, and the space portion 11
2 and the outer tube side storage portion 105b are configured by an outer tube cover 113 that axially covers the outer peripheral surface of the outer tube 105, and the other end side 108a of the conductive wire 108 is connected to the terminal 105c. The bent portion B of the electric wire 108 is located in the space 112. The reason why the conductive portion 108 is provided with the elastic portion 108b is that the elastic portion 108b absorbs the change in the required length of the conductive wire 108 by moving the inner tube 106 in the outer tube 105 in the axial direction. is there.

The protective cover 109 provided on the outer peripheral surface of the inner pipe 106 is guided by a groove 114 provided on the inner peripheral surface side of the outer pipe 105 as shown in FIG. It can move but cannot rotate in the radial direction, and functions to prevent the inner tube 106 from rotating.

Further, on the outer peripheral surface of the inner tube 106, the conductive wire 1
08 are not arranged, that is, a plurality of recesses 115 are provided at intervals along the axial direction on the outer peripheral surface facing the inner pipe side storage portion 106b, and at the end E of the outer pipe 105 and the inner pipe 1
An opening 116 is provided at a portion of the 06 facing the recess 115, and the ball or pin 11 arranged in the opening 116.
7 (locking body) is fitted in the concave portion 115 of the inner pipe 106 to prevent axial movement of the inner pipe 106. Inner tube 10
6 is moved in the axial direction, the operating body 118 is slid in the direction of the arrow against the spring 119, and the operating body 1 is moved.
The retainer 120 attached to the end of 18 is moved to allow the ball or pin 117 to move in the outer peripheral direction, and the ball or pin 117 is moved to the recess 115 of the inner pipe 106.
To allow the inner tube 106 to move in the axial direction.

Particularly, as shown in FIG. 3, when the cleaning operation is performed, the concave portion 115 is arranged so as to be located below,
The ball or pin 117 pushed up by the retainer 120 from below the recess 115 is removed from the recess 115 by its own weight. Therefore, the ball or pin 11
7 does not rub against the concave portion or the outer peripheral surface of the inner pipe 106, or its rubbing force becomes weak, and the friction between the ball or pin 117 and the inner pipe due to the movement of the inner pipe 106 can be reduced, and the movement of the inner pipe 106 can be reduced. The operation power is also light. In addition,
A ball or pin 117, which is a kind of a locking body, and the retainer 120 constitute a regulation body that regulates expansion and contraction of the inner tube 106.

Reference numeral 121 denotes an annular packing provided at the end D of the inner pipe 106, which comes into contact with the inner peripheral surface of the outer pipe 105. 122
Is an annular packing that is provided at the end E of the outer pipe 105 and is in contact with the outer peripheral surface of the inner pipe 106 to prevent air leakage.

The expansion / contraction operation of the extension pipe configured as described above will be described. First, if you want to extend the extension tube,
The operating body 118 is operated so that the ball or the pin 117 can ride over the concave portion of the inner tube 106, and the inner tube 106 is pulled out from the outer tube 105. Inner tube 10 with a predetermined length
6 is pulled out, the ball or pin 117 and the inner tube 106
Fits into the concave portion of the inner tube 106, and the inner tube 106 is regulated by the pulled out length.

When the inner pipe 106 is pulled out, the end portion of the inner pipe 106
Since D moves to the end E side of the outer tube 105, the conductive wire 108
The elastic portion 108b of the contracts. By providing the inclined portion (guide means) 123 extending below the opening 111,
Since the movement of the conductive wire 108 in the axial direction can be changed in the direction toward the space 112, the conductive wire 108 can be smoothly introduced into the space 112.
Since 08 is not sandwiched between the inner pipe 106 and the outer pipe 105, damage to the conductive wire 108 can be prevented for a long period of time.

In order to prevent the inner pipe 106 from falling out of the outer pipe 105, a stopper 124 protruding to the outer periphery of the inner pipe 106 on the end D side and an opening 111 of the outer pipe 105.
The stoppers 125 projecting downwards of the above are in contact with each other.

Next, when accommodating the extension tube, the operation body 118 may be operated in reverse to the above operation to move the inner tube 106 into the outer tube 105 and accommodate it. In this case, the end D of the inner tube 106 moves in a direction away from the opening 111 of the outer tube 105, and the stretchable portion 108b of the conductive wire 108 in the space 112 gradually extends and is led out from the opening 111. In this way, the length of the conductive wire 108 is set to the inner pipe 10.
6 can be changed according to the movement of the extension pipe, that is, the expansion and contraction of the extension pipe.
It is possible to prevent the conductive wire 108 from being exposed to the outer peripheral side and being caught by an object or a hand to deteriorate the cleaning workability, and also to prevent the conductive wire 108 from being broken due to a pulling force. it can.

Further, since the inner pipe 106 is prevented from rotating by using the protective cover 109 for disposing the conductive wire 108, a new protrusion for preventing rotation is not formed in the inner pipe 106, The workability and productivity of the inner pipe 106 can be improved. Further, since the inner tube 106 is not inadvertently rotated, the conductive wire 108 can be prevented from being damaged or broken without applying an unreasonable force such as a twisting force to the conductive wire 108.

Furthermore, the plurality of recesses 115 on the outer peripheral surface of the inner pipe 106 and the balls or pins 117 that fit into the recesses 115 make it possible to keep the pull-out length of the inner pipe 106 constant. Even if external force is applied to contract the extension pipe during cleaning work, the inner pipe 10
6 can be prevented from suddenly entering the outer pipe 105, and the conductive wire 108 between the inner pipe 106 and the outer pipe 105 can be prevented from being suddenly subjected to a force and broken.

Further, when the floor nozzle collides with a wall or the like during the cleaning work and a force acts on the inner pipe 106, the force acts on the recess 115 whose position is regulated by the ball or the pin 117. Inner pipe side storage portion 10 provided in the inner pipe 106
Since the plurality of recesses 115 are provided at a position where 6b does not exist, that is, at a position facing the inner pipe side storage portion 106b, the force received by the recess 115 is not directly transmitted to the inner pipe side storage portion 106b. Therefore, there is no need to reinforce the inner tube side storage portion 106b on the assumption that such a force is received, and since a large force does not act, damage to the storage portion 106b or disconnection of the conductive wire 108 inside the storage portion 106b. It can be prevented. In order to improve the strength of the recess 115, the inner tube 106 is preferably made of metal.

Assuming that the recess 115 is formed on the upper surface of the inner pipe side storage portion 106b, the inner surface of the inner pipe side storage portion 106b becomes uneven, and the conductive wire is expanded or contracted when the extension pipe is expanded or contracted. 108 is the inner tube side storage section 106b
The protrusions on the inner surface rub against each other, causing a problem in durability of the conductive wire 108. However, the recess 115 is not
The problem above can be solved by installing it in the part without 6b,
The life of the conductive wire 108 can be extended.

When the pressing tool 120 is operated to release the pressing force applied to the ball or pin 117, the ball or pin 117 is easily pulled out from the recess 115 by its own weight, and the inner tube 106 and the ball or pin 117 are separated from each other. The rubbing force can be reduced, and the movement operation force of the inner tube 106 can be greatly reduced. Moreover, when the inner pipe 106 is moved, the inner pipe 10
6, outer peripheral surface or recess 115 and ball or pin 117
The rubbing noise with can be reduced.

Further, when the depression 115 is provided on the lower side of the inner tube 106 so that the ball or the pin 117 falls under its own weight when the pressing force of the holding tool 120 is released, dust or the like adhering to the surface of the depression 115 is removed from the outer tube. Since it comes into contact with the annular packing 122 provided on 105 and is peeled off and falls downward as it is, it is possible to prevent dust and the like from reattaching to other parts of the inner pipe 106.

[0029]

As is apparent from the above embodiments, according to the invention described in claim 1 of the present invention, the outer pipe and the inner pipe forming the extension pipe are provided with the accommodating portions of the conductive wires, Conductive wire is not exposed on the outer peripheral side of the pipe and outer pipe, conductive wire is not caught during cleaning work, cleaning work is good, and there are multiple inner pipes to adjust the length of the extension pipe. The restriction body is provided on the outer tube side so that the restriction body fits in the recess.
By providing the recess and the regulating body at positions where there is no accommodation portion, it is possible to prevent the force received from the regulating body from being directly applied to the accommodation portion, and to prevent damage to the accommodation portion or disconnection of the conductive wire in the accommodation portion.

According to the second aspect of the present invention, when the pressing tool is operated so as to release the pressing force of the pressing tool, the locking body that has been fitted into the recessed part is pulled out from the recessed part due to its own weight. Therefore, when the inner pipe is moved, the locking body is less likely to rub against the inner pipe, so that the rubbing noise can be reduced and the operation force for moving the inner pipe can be reduced. Also, since the locking body can be easily removed from the recess simply by moving the pressing tool, and the frictional force between the locking body and the inner pipe is weak, the pressing tool can be moved with one hand and the one hand with which the pressing tool is moved. By moving the outer tube in the axial direction, the inner tube can be easily inserted into the outer tube, and the extension and contraction operability of the extension tube can be improved.

According to the third aspect of the present invention, the protrusion or groove formed on a part of the outer peripheral side of the inner pipe is moved in the axial direction by the guide part provided on the inner peripheral side of the outer pipe. Therefore, the inner pipe can be moved in the outer pipe in the axial direction, and the inner pipe can be prevented from rotating with respect to the outer pipe. Therefore, regardless of the extension / contraction operation of the extension pipe,
It is possible to prevent the inner tube from rotating around the outer tube, and it is possible to prevent the conductive wire arranged in each housing portion of the inner tube and the outer tube from being twisted and broken.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an extension tube of an electric vacuum cleaner showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a side view of the electric vacuum cleaner.

FIG. 4 is a side view of the extension pipe.

FIG. 5 is a side view showing a state in which the extension tube of the conventional electric vacuum cleaner is stored.

FIG. 6 is a side view showing the extension state of the extension tube of the vacuum cleaner.

[Explanation of symbols]

 105 Outer tube 105b Outer tube side storage section 106 Inner tube 106b Inner tube side storage section 108 Conductive wire 108b Expansion / contraction section 109 Protective cover (protruding section) 114 Recessed section (guide section) 115 Groove section 117 Ball or pin (regulator) 120 Presser (Regulatory body)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuma Suo 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Masakazu Onda 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Hidenori Kitamura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A cleaner body, a hose having one end connected to the cleaner body, and an extension pipe connecting the other end of the hose to a floor nozzle, wherein the extension pipe is made of a conductive wire. An outer tube provided with an outer tube side accommodation section for accommodating a portion, and an inner tube provided with an inner tube side accommodation section that is axially movable in the outer tube and accommodates a part of the conductive wire, A part of the conductive wire is made expandable and contractable, and a part of the outer periphery of the inner pipe other than the inner pipe side storage portion is formed with a plurality of recesses at intervals along the axial direction,
The electric vacuum cleaner provided with a regulation body that engages with a plurality of recesses of the inner pipe on the outer pipe side to regulate movement of the inner pipe. 2. The restricting body comprises a locking body that fits in the recess and a retainer that presses the locking body inside the recess. When the pressing force from the retainer is released, the restricting body is pulled out from the recess by its own weight. The vacuum cleaner according to claim 1, wherein the locking body is arranged as described above. 3. A guide part for axially guiding the protrusion or groove of the inner pipe, wherein a protrusion or groove extending in the axial direction is formed on a part of the outer periphery of the inner pipe, and the inner pipe of the outer pipe is axially guided. 2. The electric vacuum cleaner according to claim 1, further comprising: a rotation preventing mechanism that prevents the inner pipe from rotating with respect to the outer pipe by the protrusion or the groove and the guide.