JP5208181B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner, and more particularly to a telescopic extension tube coupled between a hose unit connected to a vacuum cleaner body and a floor suction tool.

  A cylindrical sleeve and a stop ring are arranged between the first pipe member and the second pipe member in the extension pipe of the conventional vacuum cleaner, and the inner peripheral surface has a sealing function between the two. There is one in which a seal ring provided with a projecting portion is fixed and a gap formed between the inner peripheral surface of the stop ring and the second pipe member is sealed by the tip portion of the projecting portion. (For example, refer to Patent Document 1).

  In addition, there is one in which a large-diameter portion is in contact with the seal portion at the end portion of the second tube body that is inserted into the first tube body so as to be stretchable (see, for example, Patent Document 2). ).

Japanese Patent No. 3262984 (page 3-4, Fig. 7-9) Japanese Patent No. 3186032 (page 13, FIG. 15)

  In the extension pipe of Patent Document 1, when the first pipe member, the second pipe member, the sleeve, or the stop ring is formed of a synthetic resin, it is difficult to ensure roundness. For this reason, the gap between the inner peripheral surface of the stop ring and the outer peripheral surface of the second pipe member can be sealed by the deformation of the projecting portion of the seal ring. When it is low, the repulsive force that the seal ring pushes back against the second pipe member increases, so that the frictional force between the protruding portion and the second pipe member increases, and the expansion and contraction operation of the second pipe member becomes heavy. The problem occurs.

  Grease is used to solve such problems, but the expansion and contraction force changes due to the variation in the amount of grease. There was a problem.

  Further, if the thickness of the projecting portion of the seal packing is thin, it is likely to be caught in the gap between the inner peripheral surface of the stopper ring and the second pipe member, and if the thickness is thick, the roundness variation of each component is reduced. There is a problem that the sealing performance is deteriorated because it is difficult to follow and to deform to prevent wind leakage.

Further, when the recess provided in the second pipe member passes through the inside of the seal packing during the expansion / contraction operation, the tip of the protruding portion of the seal packing is caught between the upper side of the recess and the sleeve or stopper ring. Therefore, the projecting portion is cut or left in the gap, which may cause a malfunction of the expansion / contraction operation.
In addition, since the protruding portion of the seal packing is always in sliding contact with the outer peripheral surface of the second pipe member during the expansion / contraction operation, there is a problem that the seal packing is easily worn and the life is shortened.

  The extension pipe of Patent Document 2 has no problem at the time of maximum extension, but at the time of other extension, there is a gap between the first pipe body and the second pipe body over the entire circumference, so the second pipe body is loose. The problem was that it became unstable and unusable.

  An object of the present invention is to obtain an electric vacuum cleaner that can be remotely operated by an operation lever provided in the vicinity of a hand handle of a hose unit for locking and releasing the inner tube when the extension tube is expanded and contracted. Is.

The vacuum cleaner according to the present invention includes a vacuum cleaner main body provided with a dust collection chamber and an electric blower inside, a hose unit provided with one end of a bellows hose connected to the vacuum cleaner main body and a hand handle at the other end. A telescopic extension pipe connected to the hand handle of the hose unit, and a floor suction tool connected to the suction port of the extension pipe , and the extension pipe has an inner pipe locking means on the tip side. And an inner tube having a plurality of engaging portions locked in the longitudinal direction by the inner tube locking means and slidably inserted into the outer tube, the inner tube locking means, The inner tube lock lever that is slidable in the front-rear direction on an inner tube lock lever that is engaged with the engagement portion of the inner tube and a reinforcing tube that is fixed to the inner periphery of the outer tube on the distal end side. a stopper support member that controls the lever, communicating provided on the end portion side of the rear of the outer tube Constituted by a spring which biases the operating lever connected to said stopper support member, the pre-Symbol stopper support member at the tip end of the outer tube by wood, the spring, the stopper support member and the outer tube The connecting member is inserted between the spring holder and the spring support projecting from the rear end of the stopper holding member .

  In the present invention, the operation lever of the inner pipe locking means is provided in the vicinity of the hand handle of the hose unit so that it can be remotely operated. You can get a good vacuum cleaner.

It is explanatory drawing which shows the whole structure of the vacuum cleaner which concerns on embodiment of this invention. It is sectional drawing of the extension pipe | tube of the vacuum cleaner which concerns on embodiment of this invention. It is an enlarged view of the principal part of FIG. It is action | operation explanatory drawing of the extension pipe | tube of FIG.

Embodiment.
FIG. 1 is an explanatory view showing the overall configuration of a vacuum cleaner according to the present invention. In the following description, the electrical system is omitted.
The vacuum cleaner main body 1 is provided with a dust collection chamber 2, an electric blower 3, and the like. A front wheel 4a is provided at the bottom of the front surface, and a rear wheel 4b is provided on both sides on the rear side. 5 is a hose unit, and at one end of the bellows hose 6 is provided a connector 7 provided on the front side of the vacuum cleaner main body 1 and detachably connected to a blowing port communicating with the dust collecting chamber 2. A hand handle 8 having an operation unit such as a power switch is provided at the other end. An extension pipe 10 in which an outer tube 11 and an inner pipe 12 are connected to each other is connected to the suction port of the hand handle 8. A floor suction tool 9 is detachably connected to the suction port of the extension tube 10. Is done.

FIG. 2 is a cross-sectional view of the extension pipe of the vacuum cleaner according to the embodiment of the present invention, and FIG. 3 is an enlarged view of the main part of FIG.
A reinforcing tube 19 is fixed to the inner peripheral side of the outer tube 11 on the distal end side with a slight gap from the outer peripheral surface of the inner tube 12, and an opening hole 19a and a spherical shape ( (Or arc-shaped) recesses 19b are provided.

  A diameter of the rear end portion of the inner tube 12 inserted into the outer tube 11 is increased, and an inner tube seal portion 30 having an outer diameter substantially equal to the inner diameter of the reinforcing tube 19 is formed. In the longitudinal direction of the outer tube 11 on the side corresponding to the inner tube lock lever 50, for example, a plurality of concave locking portions 31 are provided, and the inner tube seal is provided in the opposite longitudinal direction. Groove-shaped guide rails 32 reaching the vicinity of the portion 30 are formed. On both sides of the guide rails 32, rattling prevention ribs 33 having substantially the same height as the inner tube seal portion 30 are provided in parallel to the guide rails 32. . The rattle prevention ribs 33 are not limited to both sides of the guide rail 32, and may be provided anywhere on the outer peripheral surface of the inner tube 12, but it is desirable to provide them as vertically and horizontally as possible. Reference numeral 34 denotes a locking portion of the floor suction tool 9 provided at the suction port of the inner pipe 12. Reference numeral 28 denotes a retaining portion having a width slightly narrower than the width of the guide rail 32 provided on the reinforcing tube 19 (or the large-diameter portion 11a of the outer tube 11) so as to be loosely fitted to the guide rail 32.

  40 is a stopper holding member which has legs on the front side and the rear side of the top plate and is slidable in the longitudinal direction along the reinforcing tube 19 between the outer tube cover 13 and the reinforcing tube 19. Thus, the first opening 42a is provided on the front end side in the longitudinal direction of the top plate, and the second opening 42b shorter than the first opening 42a is provided on the rear side with the suppressing part 41 interposed therebetween. ing. Moreover, the upper part is opened at the rear end part side, and the latching | locking part 43 which the bending part provided in the end of the below-mentioned connection material 45 latches is provided, and also the semi-cylindrical shape is provided in the rear end part. The spring receiver 43a is projected. Note that the bent portion of the connecting member 45 may be inserted from below.

  Reference numeral 44 denotes an operation lever disposed in a guide hole 13a provided in the vicinity of the rear end portion of the outer tube cover 13 so as to be slidable back and forth. One end of the connecting member 45 attached to the operation lever 44 is connected to the other end. It is bent and locked to the locking portion 43 of the stopper holding member 40. Reference numeral 46 denotes a spring interposed in the connecting member 45 between the outer tube 11 and the spring receiver 43a of the stopper holding member 40, and always biases the stopper holding member 40 toward the tip end side.

  Reference numeral 50 denotes a plate-like inner tube lock lever disposed between the reinforcing tube 19 and the stopper holding member 40, and extends downward at one end (tip end side) of the lock receiving portion 51 whose top and bottom are flat. An engaging portion 52 that is engaged with the engaging portion 31 of the inner tube 12 is provided, and the other end of the lock receiving portion 51 protrudes downward and rotates to the recess 19 b of the reinforcing tube 19. A freely-supported hemispherical (or arc-shaped) support portion 53 is provided, and an upper portion of the support portion 53 is formed with a release receiving portion 54 inclined obliquely upward toward the rear side. The stopper receiving member 40, the operation lever 44, the connecting member 45, the spring 40, and the inner tube lock lever 50 constitute an inner tube lock mechanism.

  As shown in FIG. 3, in a state where the inner tube 12 is connected to the outer tube 11, the stopper holding member 40 is biased by the spring 46 and is positioned on the distal end side of the outer tube 11. The lock lever 50 has its lock receiving portion 51 regulated by the restraining portion 41 of the stopper holding member 40 and is held almost horizontally, and its engaging portion 52 is latched to the latching portion 31 of the inner tube 12 and the inner tube 12. Lock. At this time, the upper portion of the support portion 53, and thus the release receiving portion 54, is located in the second opening 42 b of the stopper holding member 40.

  When adjusting the length of the extension tube 10, when the operation lever 44 is pulled forward (rear side) along the guide hole 13a, the movement is transmitted to the stopper holding member 40 via the connecting member 45, and FIG. As shown in FIG. 3, the stopper holding member 40 is slid along the reinforcing tube 19 to the rear side. As a result, the restraining portion 41 of the stopper holding member 40 reduces the release receiving portion 54 of the inner tube lock lever 50, rotates the inner tube lock lever 50 in the clockwise direction around the support portion 53, and the engaging portion 52. Is disengaged from the locking portion 31, and the lock of the inner tube 12 is released. At this time, the upper portion of the engaging portion 52 is located in the first opening 42 a of the stopper holding member 40.

  In this state, when the inner pipe 12 is expanded and contracted and the extension pipe 10 is adjusted to a desired length, the operation lever 44 is released to return to the original position. Thereby, the stopper holding member 40 is urged by the spring 46 and slides toward the distal end side, and the restraining portion 41 is separated from the release receiving portion 54 of the support portion 53 and positioned on the lock receiving portion 51. The inner tube lock lever 50 rotates counterclockwise around the support portion 53 and returns to the state shown in FIG. 3. The engagement portion 52 is engaged with the corresponding engagement portion 31, and the inner tube 12. Lock.

In the present embodiment configured as described above, when the inner tube 12 is locked, the support portion 53 of the inner tube lock lever 50 is raised, but the release receiving portion 54 is provided with a stopper holding member 40 as shown in FIG. When the inner tube 12 is unlocked, the inner tube lock lever 50 rotates and the engaging portion 52 rises, but the upper portion is as shown in FIG. Since the stopper holding member 40 is positioned within the first opening 42a, it does not interfere with other members in any case.
For this reason, since the inner pipe locking means can be provided in a small space, the extension pipe 10 can have a slim design.

  Further, as shown in FIG. 3, the bent end portion of the connecting member 45 inserted through the spring 46 is locked to the locking portion 43 of the stopper holding member 40, and the end portion of the spring 46 is fitted to the spring receiver 43a. As a result, even if the leading end of the connecting member 45 tries to move upward for any reason, the movement is prevented by the spring 46 fitted to the spring receiver 43a, so that the connecting member 45 comes out of the stopper holding member 40. There is nothing.

Next, the operation of the vacuum cleaner having the extension tube 10 as described above will be described.
First, the extension pipe 10 adjusted to a desired length as described above is connected to the suction port of the hand handle 8 of the hose unit 5, and the floor suction tool 9 is connected to the suction port of the inner pipe 12 of the extension pipe 10. To do. Then, the connector 7 of the hose unit 5 is connected to the suction port of the cleaner body 1.
Thereby, the air path from the floor suction tool 9, the extension pipe 10, and the hose unit 5 to the dust collecting chamber 2 of the cleaner body 1 is formed.

  Then, a cord (not shown) provided on the vacuum cleaner body 1 is connected to a power source, the power switch provided on the hand handle 8 is turned on to drive the electric blower 3, and the floor suction tool 9 is placed on the floor surface or the like. If moved along, the dust and the like sucked from the floor suction tool 9 by the suction force of the electric blower 3 passes through the extension pipe 10 and the hose unit 5 and is sent to the cleaner body 1 to the dust collecting chamber 2. The air collected and separated from the dust and the like is purified by a filter (not shown), cools the motor and control board of the electric blower 3, and is discharged to the outside through the exhaust port. If necessary, the extension tube 10 may be expanded and contracted as described above, or a further tube may be connected to the extension tube 10.

  As described above, according to the present embodiment, the operation lever 44 of the inner tube locking means is provided on the rear side of the outer tube 11, that is, in the vicinity of the hand handle 8 of the hose unit 5, so Therefore, it is possible to obtain an easy-to-use extension tube 10, and thus a vacuum cleaner.

  DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body, 5 Hose unit, 8 Hand handle, 9 Floor suction tool, 10 Extension pipe, 11 Outer pipe, 12 Inner pipe, 13 Outer pipe cover, 19 Reinforcement pipe, 28 Retaining part, 30 Inner pipe seal part , 31 Locking part, 32 Guide rail, 33 Anti-rattle rib, 40 Stopper holding member, 44 Operation lever, 45 Connecting material, 46 Spring, 50 Inner tube lock lever, 52 Engagement part, 53 Support part.

Claims (3)

A vacuum cleaner body with a dust collection chamber and electric blower inside, a hose unit with one end of the bellows hose connected to the vacuum cleaner body and a hand handle at the other end, and a hand handle of the hose unit A telescopic extension pipe, and a floor suction tool connected to the suction port of the extension pipe,
The extension tube has an outer tube having an inner tube locking means on the tip side and a plurality of engaging portions locked in the longitudinal direction by the inner tube locking means, and is slidably inserted into the outer tube. Consisting of an inner pipe,
The inner pipe locking means,
And the inner tube locking lever for locking the locking portion of the inner tube,
A stopper holding member that is slidably disposed in the front-rear direction on a reinforcing tube fixed to the inner periphery of the outer tube on the tip side, and controls the inner tube lock lever;
An operating lever connected to said stopper support member by the connecting member provided at an end side of the rear of the outer tube,
The pre-Symbol stopper support member constituted by a spring biasing the front end portion of the outer tube,
The connecting member is inserted between the outer tube and the stopper holding member, and a spring receiver protruding from a rear end portion of the stopper holding member is inserted into the spring. Electric vacuum cleaner. A vacuum cleaner body with a dust collection chamber and electric blower inside, a hose unit with one end of the bellows hose connected to the vacuum cleaner body and a hand handle at the other end, and a hand handle of the hose unit A telescopic extension pipe, and a floor suction tool connected to the suction port of the extension pipe,
The extension tube has an outer tube having an inner tube locking means on the tip side and a plurality of engaging portions locked in the longitudinal direction by the inner tube locking means, and is slidably inserted into the outer tube. Consisting of an inner pipe,
The inner pipe locking means,
An inner tube lock lever that is engaged with the engagement portion of the inner tube;
A stopper holding member that is slidably disposed in the front-rear direction on a reinforcing tube fixed to the inner periphery of the outer tube on the tip side, and controls the inner tube lock lever;
An operation lever provided on the rear end side of the outer pipe and connected to the stopper holding member by a connecting material;
It is interposed between the outer tube and the stopper holding member, and is configured by a spring that biases the stopper holding member toward the distal end side of the outer tube,
An inner tube lock lever of the inner tube locking means is provided at a lock receiving portion, an engaging portion provided at one end of the lock receiving portion and engaged with an engaging portion of the inner tube, and the other end of the lock receiving portion. And a support portion that is rotatably held by the reinforcing tube and has a release receiving portion on the upper portion,
The stopper holding member includes a first opening provided corresponding to the engaging portion of the inner tube lock lever, a suppressing portion provided corresponding to the lock receiving portion, and a release receiving portion of the support portion. electrical cleaner you characterized in that a second opening provided in correspondence with the part. The inner tube locking means, when said extension tube and adjusted to a desired length, the stopper support member is biased by the spring located at the distal end side of the outer tube, the inner tube wherein the suppression unit and rolling the lock receiving portion of the lock lever is engaged the engaging portion with the engaging portion of the inner tube, when the slide the stopper support member to the rear end side by the operation lever the suppressing unit claim There, characterized by being configured so as to disengage the inner tube locking lever by pressure release receiving portion of the inner tube locking lever is rotated, the engaging portion from the engagement portion of the inner tube 2 Symbol placement of the vacuum cleaner.

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