JP2007209672A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner facilitating an unlocking operation of a lock and extending/contracting operations of respective pipes. <P>SOLUTION: This vacuum cleaner has extensible extension wands 20 provided between a hand operation part of a dust collecting hose to be connected to a cleaner body and a suction port body; the extension wands 20 are provided with at least a first pipe 21, a second pipe 30 being stored so as to be extractable in the first pipe 21, extracted from one end of the first pipe 21 and fixed at an optional extension position, and a third pipe 40 being movable between a storage position to be stored inside the second pipe 30 and an extension position extending by being extracted from one end of the second pipe; the second pipe 30, at its one end, is provided with a ring member 60 moving radially to the second pipe 30 and locking and unlocking the third pipe; the first pipe is provided with an operation piece 25 at one end; and the operation piece 25 locks and unlocks the third pipe 40 by radially moving the ring member 60 according to the position of the second pipe 30 and the moving position of the third pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner provided with a telescopic tube that can be expanded and contracted.

  2. Description of the Related Art Conventionally, there has been known an electric vacuum cleaner including a telescopic telescopic tube provided between a hand operating portion of a dust collecting hose connected to a vacuum cleaner body and a suction port body (see Patent Document 1).

  The telescopic tube of such a vacuum cleaner can be drawn into the first pipe, the second pipe accommodated in the first pipe, the second pipe accommodated in the first pipe, and the second pipe. And a third pipe to be stored.

  This telescopic tube locks the first to third pipes in the respective storage positions and extended positions by locking means, and the locking means are provided at the front operation pipe and the distal end portions of the first and second pipes, respectively. The means comprises a ring member, and the ring member has a plurality of arms extending in the axial direction, a protrusion provided inside the arm, and an annular protrusion provided on the inner peripheral surface of the ring member. Yes.

  And the collar provided in the outer peripheral surface of the rear part of the 1st-3rd pipe is located between the protrusion part of an arm, and the annular projection part of a ring member, and the movement of the axial direction of a 1st-3rd pipe is carried out. It is blocked and the first to third pipes are locked.

To release this lock, a release catch provided on the hand control tube or the like is inserted between the arm of the ring member and the first pipe, and the arm is expanded so that the collar is connected to the protrusion of the arm and the ring member. It is performed by releasing from between the annular protrusions.
Special table 2004-100960 gazette

  However, in such a vacuum cleaner, since the arm of the ring member is expanded, a large force is required for the unlocking operation, and the ring member is not sufficiently expanded. There is a problem that a large force is required for the expansion and contraction operation of each pipe.

  An object of the present invention is to provide a vacuum cleaner that can be easily unlocked and can easily extend and contract each pipe.

The invention of claim 1 is an electric vacuum cleaner comprising a telescopic telescopic tube provided between a hand operating part of a dust collecting hose connected to a vacuum cleaner body and a suction port body,
The telescopic tube is housed in a first pipe, a second pipe that is retractably housed in the first pipe and that can be pulled out from one end of the first pipe and fixed at an arbitrary extension position, and the second pipe. At least a third pipe movable to a storage position and an extended position where the second pipe is drawn out and extended from one end of the second pipe;
A locking means for moving in the radial direction of the second pipe to lock or unlock the third pipe is provided on one end side of the second pipe;
An operation piece is provided at one end of the first pipe,
According to the operation piece, according to the position of the second pipe and the movement position of the third pipe, the locking means is moved in the radial direction to lock the third pipe and release the lock. Features.

  According to the present invention, since the locking means for locking and unlocking the third pipe by moving in the radial direction is provided, the unlocking operation can be easily performed and the expansion and contraction operation of each pipe can be easily performed.

  Hereinafter, the Example which is embodiment of the vacuum cleaner concerning this invention is described based on drawing.

  A vacuum cleaner 10 shown in FIG. 1 includes a vacuum cleaner main body 11, a dust collection chamber 12 provided in the vacuum cleaner main body 11, an electric blower 13 that makes the dust collection chamber 12 have a negative pressure, and a vacuum cleaner main body 11. A dust collection hose 15 having one end detachably connected to a hose connection port 11a provided at the front of the tube and an extension pipe detachably connected to a hand operation tube 17 provided at the other end of the dust collection hose 15 ( (Expandable tube) 20 and a suction port body 100 detachably connected to the distal end portion of the extension tube 20. A dust collection container (not shown) having a dust separation part for inertial separation of dust and a dust collection part for collecting the dust separated by the dust separation part is detachably attached to the dust collection chamber 12. ing.

  Further, the operation tube 17 is provided with an operation unit 17A. The operation unit 17A has strength switches Sa and Sb for setting the strength of the electric blower, an off switch Sc, and a power brush provided in the suction port body 100. A power brush switch Sd for driving the motor M is provided.

  As shown in FIGS. 2 to 4, the extension pipe 20 includes a first pipe 21 that is detachably connected to the hand operation pipe 17, and is housed in the first pipe 21 so as to be drawable. The second pipe 30 that can be pulled out from one end and fixed at an arbitrary extension position, and can be moved to a storage position that is housed in the second pipe 30 and an extension position that is drawn from one end of the second pipe 30 and extends. And a third pipe 40. A connecting pipe 101 of the suction port body 100 is detachably connected to the distal end portion of the third pipe 40 via a connection adapter 102.

  A clamp case 22 is attached to the lower side of the distal end portion 21 </ b> A of the first pipe 21, and a clamp member 23 is provided on the clamp case 22. By operating the clamp member 23, the second pipe 30 can be fixed at an arbitrary extension position. Further, as shown in FIGS. 5 and 6, a seal pipe 24 that seals between the first pipe 21 and the second pipe 30 is attached to the tip 21 </ b> A of the first pipe 21. An operation piece 25 protruding forward is formed on the front side. An inclined surface 25a is formed at the distal end portion 25A of the operation piece 25 so that the distal end portion 25A is tapered.

  A first cover case 26 is attached to the upper part of the first pipe 21, and the rear part of the first pipe 21 is a small-diameter connection part 21 </ b> B, which is connected to the hand operation pipe 17. It will be.

  As shown in FIG. 7, the second pipe 30 has a plurality of recesses (engagement portions) 31 formed at equal intervals along the axial direction at the lower portion, and a tip portion (left end portion in FIG. 7). Is formed with a large-diameter joining pipe portion 32, and the rear portion 30B is inserted into a seal pipe 24 attached to the first pipe 21 as shown by a chain line in FIG. The second pipe 30 is locked to an arbitrary extension length by engaging the distal end portion 23a of the clamp member 23 of the first pipe 21 with the recess 31.

  In addition, the upper wall portion of the joining pipe portion 32 is formed in two stages composed of the first upper wall portion 32Aa and the second upper wall portion 32Ab, and between the first upper wall portion 32Aa and the second upper wall portion 32Ab. A gap 33 into which the distal end portion 25A of the operation piece 25 shown in FIG. 5 is inserted is formed. Further, the rear portion of the first upper wall portion 32Aa and the front portion of the second upper wall portion 32Ab are overlapped, and a hole 34 is formed in the first upper wall portion 32Aa that is not overlapped. A hole 35 is also formed.

  A decoration ring K is attached to the tip of the second pipe 30 as shown in FIGS. 2 to 4, and the tip of the second cover case 37 is fixed to the top of the decoration ring K. The rear side of the second cover case 37 is inserted into the first cover case 26. When the second pipe 30 is pulled out from the first pipe 21, the second cover case 37 is moved to the first cover according to the pull-out. It is pulled out from the case 26.

  As shown in FIG. 8, a holding pipe 50 is fitted into the joint pipe portion 32 of the second pipe 30. The holding pipe 50 seals between the second pipe 30 and the third pipe 40.

  An opening 51 is formed in the upper part of the holding pipe 50 as shown in FIG. 9, and a hole 52 is formed in the lower part. In addition, a pair of protrusions 55 extending vertically are formed on both sides of the inner wall surface of the holding pipe 50. A flange 53 is formed at the tip of the holding pipe 50, and a long hole 54 is formed at the top of the flange 53.

  In the holding pipe 50, a ring member (lock member) 60 inserted from the opening 51 is disposed as shown in FIG. Then, the holding pipe 50 is fitted into the joining pipe portion 32 of the second pipe 30 as shown in FIG. 8, and the hole 52 of the holding pipe 50 and the hole 35 of the joining pipe portion 32 of the second pipe 30 are opposed to each other. Yes.

  The ring member 60 has an inner diameter that is set larger than the outer diameter of the third pipe 40. As shown in FIG. 9, a rectangular protrusion (first protrusion) provided at the lower part of the inner peripheral wall surface (inner wall surface) 60A. ) 61 and a protrusion 62 (see FIG. 10) provided at the lower portion of the outer peripheral wall surface. In addition, an inclined protrusion 63 having an inclined surface 63a is provided on the upper portion of the outer peripheral wall surface, and a pair of notches 65 are provided on the upper side of the inclined protrusion 63 on the front side (left side in FIG. 9) as shown in FIG. Is provided. A portion sandwiched between the pair of cutouts 65 forms a locking piece 66 having elasticity in the vertical direction by the cutout 65, and a locking hole (first recess) 64 is formed in the locking piece 66. Yes. The locking hole 64 and the protrusion 61 are substantially opposite to each other.

  Further, a pair of guide grooves 67 extending in the vertical direction are formed on both sides of the outer peripheral wall surface of the ring member 60, and ribs 68 are formed on both sides of the pair of guide grooves 67. The pair of guide grooves 67 are engaged with the protrusions 55 of the holding pipe 50, and the ring member 60 can move up and down along the protrusions 55 in the holding pipe 50, that is, move in the radial direction. It has become.

  As shown in FIG. 3, one end of a spring (biasing means) P disposed in the hole 35 of the joining pipe portion 32 of the second pipe 30 is attached to the protrusion 62 of the ring member 60. The other end of the spring P is held on the decoration ring K of the second pipe 30 via the contact member T. The ring member 60 is biased upward by a spring P.

  Then, the rear portion 40B of the third pipe 40 shown in FIG. 12 is inserted into the holding pipe 50 and the ring member 60 shown in FIG. Since the inner diameter of the ring member 60 is larger than the outer diameter of the third pipe 40, the ring member 60 can move up and down within the holding pipe 50. The ring member 60 and the spring P constitute a locking means.

  As shown in FIG. 13 (A), the third pipe 40 has a large-diameter connecting pipe portion 41 formed at the tip portion (left end portion in FIG. 13). The connection adapter 102 is connected to the connection pipe portion 41. Further, a locking projection (second projection) 42 is formed on the upper rear portion of the connection pipe portion 41 of the third pipe 40, and an engaging recess (second recess) 43 is formed on the lower portion on the rear side of the third pipe 40. Is formed.

  As shown in FIG. 13B, the locking projection 42 has an inclined surface 42a on the right side, and is a standing surface 42b that stands up on the left side.

  When the third pipe 40 is pulled out from the second pipe 30 and moved to the extended position shown in FIG. 12, the ring member 60 is moved upward by the urging force of the spring P, and as shown in FIG. The projection 61 engages with the engagement recess 43 of the third pipe 40 so that the third pipe 40 is locked to the second pipe 30. At this time, the inclined protrusion 63 of the ring member 60 protrudes upward from the position of the first upper wall portion 32Aa of the second pipe 30.

  Further, when the third pipe 40 is stored in the storage position in the second pipe 30, when the second pipe 30 is stored in the first pipe 21, as shown in FIGS. 15 and 16, the ring member The locking projections 42 of the third pipe 40 are engaged with the locking holes 64 of the 60 so that the third pipe 40 is locked to the second pipe 30.

  As shown in FIGS. 2 to 4, a stand stopper 45 is attached to the tip of the third pipe 40, and the tip of the third cover case 47 is fixed to the top of the stand stopper 45. . The rear side of the third cover case 47 is inserted into the second cover case 37, and when the third pipe 40 is pulled out from the second pipe 30, the third cover case 47 is moved to the second cover according to the pull-out. It is pulled out from the case 37.

  A pair of feeder coils (not shown) are arranged in the first cover case 26, the second cover case 37, and the third cover case 47, and the first, second, and third cover cases 26, 37, and 47 Each power line coil expands and contracts in response to expansion and contraction, and one end of each power line coil is connected to the vacuum cleaner body 11 via a power line (not shown) disposed in the hand control tube 17 and the dust collecting hose 15. The other end of each power supply line coil is connected to the motor M of the suction inlet 100 via a connection adapter 102 and a power supply line (not shown) provided in the connection pipe 101. Has been.

  A clamp 48 is provided at the tip 47A of the third cover case 47, and the connection between the third pipe 40 and the connection adapter 102 is locked or unlocked by the operation of the clamp 48. It is.

[Operation]
Next, operation | movement of the vacuum cleaner comprised as mentioned above is demonstrated.

  When cleaning is performed, first, the lock of the second pipe 30 by the clamp member 23 is released, and the second pipe 30 is drawn from the first pipe 21 to a predetermined extension position as shown in FIG. Pull out from the second pipe 30 to the extended position. When the third pipe 40 is pulled out to the extended position, the projection 61 of the ring member 60 is engaged with the engagement recess 43 of the third pipe 40 by the urging force of the spring P, and the third pipe 40 becomes the second pipe 30. Locked. The second pipe 40 is locked to the first pipe 21 by the clamp member 23.

  When the strength switches Sa and Sb of the operation portion 17A of the hand operation tube 17 are operated, the electric blower 13 is driven and dust is sucked from the suction port body 100.

  When cleaning is completed and the cleaner 10 is housed, the extension tube 20 is contracted. A method of contracting the extension tube 20 will be described.

  First, as shown in FIG. 19, the second pipe 30 obtained by extending the third pipe 40 is accommodated in the first pipe 21. By this storage, the distal end portion 25A of the operation piece 25 of the first pipe 21 is inserted into the gap 33 of the joining pipe portion 32 of the second pipe 30, and the distal end portion 25A of the operation piece 25 is inclined to the ring member 60. It contacts the inclined surface 63a of the protrusion 63. When the second pipe 30 is further pushed into the first pipe 21, the distal end portion 25 </ b> A of the operation piece 25 presses the inclined protrusion 63 of the ring member 60 downward.

  Therefore, as shown in FIG. 20, the ring member 60 is pushed downward against the urging force of the spring P, and the protrusion 61 of the ring member 60 is disengaged from the engagement recess 43 of the third pipe 40, and the third The lock of the pipe 40 is released.

  The lock can be released smoothly by forming the inclined surface 25a at the tip 25A of the operation piece 25 of the first pipe 21 and forming the inclined surface 63a at the inclined protrusion 63 of the ring member 60. .

  Then, when the third pipe 40 is pushed into the second pipe 30 and stored in the storage position, the locking protrusion 42 of the third pipe 40 enters the locking hole 64 of the ring member 60 as shown in FIG. The third pipe 40 is locked to the second pipe 30 by engaging. An inclined surface 42a is formed on the locking projection 42 of the third pipe 40, and the locking piece 66 of the ring member 60 provided with the locking hole 64 has elasticity so that the locking can be performed smoothly. become.

  As shown in FIG. 16, the distal end portion 25A of the operation piece 25 of the first pipe 21 rides on the inclined protrusion 63 of the ring member 60, so that the ring member 60 is moved upward. It is blocked so that it cannot be unlocked. Moreover, since the standing surface 42b is formed in the latching protrusion 42 of the 3rd pipe 40, even if it pulls the 3rd pipe 40 to left direction (in FIG. 16), the lock | rock is not cancelled | released.

  To release this lock, the second pipe 30 is pulled out from the first pipe 21 to the left as shown in FIG. By this drawing, the distal end portion 25A of the operation piece 25 of the first pipe 21 is removed from the gap 33 of the joining pipe portion 32 of the second pipe 30, and the ring member 60 is moved upward by the urging force of the spring P (see FIG. 3). Then, the locking projection 42 of the third pipe 40 is released from the locking hole 64 of the ring member 60, and the lock is released. The third pipe 40 can be pulled out with respect to the second pipe 30.

  In this way, the ring member 60 is moved in the vertical direction (radial direction) to lock the third pipe 40 or to release the lock. The third pipe 40 is moved by the urging force of the spring P. Since the spring P is not locked, it is not necessary to increase the biasing force of the spring P. Therefore, the third pipe 40 can be easily locked and unlocked, and the third pipe 40 can be moved by the biasing force of the spring P. By not locking, the third pipe 40 can be extended and contracted without requiring a large force. Since the second pipe 30 is locked by the clamp member 23, the second pipe 30 can be easily expanded and contracted without requiring a large force.

  Although the said Example demonstrated the three-stage extension pipe | tube 20, it is not limited to this, For example, a four-stage extension pipe | tube may be sufficient. Moreover, although the ring member 60 is ring-shaped, it is not restricted to this, For example, C-shape and U-shape may be sufficient.

  The tip on the suction side of the third pipe 40 may be tapered.

It is the perspective view which showed the external appearance of the vacuum cleaner which concerns on this invention. It is the perspective view which showed a part of contracted extension pipe | tube. It is an expanded sectional view of the extension pipe shown in FIG. It is a cross-sectional perspective view of the extension pipe | tube shown in FIG. It is the perspective view which showed the 1st pipe and the seal pipe. It is sectional drawing which connected the seal pipe to the 1st pipe. It is sectional drawing which showed the 2nd pipe. It is sectional drawing which showed the state which fitted the holding pipe which has arrange | positioned the ring member in the front-end | tip part of the 2nd pipe. It is the perspective view which showed the ring member and the holding pipe. It is sectional drawing which showed the holding pipe which has arrange | positioned the ring member. (A) The top view which showed the ring member, (B) The side view which showed the ring member. It is sectional drawing which showed the state which inserted the rear part of the 3rd pipe to the holding pipe and ring member which were made to fit in the 2nd pipe. (A) It is sectional drawing which showed the 3rd pipe, (B) The elements on larger scale of the 3rd pipe. It is explanatory drawing which showed the locked state by the ring member of the extended 3rd pipe. It is explanatory drawing which showed the locked state by the ring member of the contracted 3rd pipe. It is sectional explanatory drawing which showed the locked state of the 3rd pipe at the time of accommodating the 2nd, 3rd pipe. It is sectional explanatory drawing which showed the state which pulled out the 2nd pipe from the 1st pipe and released the lock | rock of the 3rd pipe. It is sectional explanatory drawing which showed the locked state of the extended 3rd pipe. It is sectional explanatory drawing which showed the state just before releasing the lock | rock of the extended 3rd pipe. It is sectional explanatory drawing which showed the state which cancel | released the lock | rock of the extended 3rd pipe.

Explanation of symbols

20 Extension pipe 21 First pipe 25 Operation piece 30 Second pipe 40 Third pipe 60 Ring member

Claims (2)

A vacuum cleaner comprising a telescopic telescopic tube provided between the hand operating part of the dust collecting hose connected to the vacuum cleaner body and the suction port body,
The telescopic tube is housed in a first pipe, a second pipe that is retractably housed in the first pipe and that can be pulled out from one end of the first pipe and fixed at an arbitrary extension position, and the second pipe. At least a third pipe movable to a storage position and an extended position where the second pipe is drawn out and extended from one end of the second pipe;
A locking means for moving in the radial direction of the second pipe to lock or unlock the third pipe is provided on one end side of the second pipe;
An operation piece is provided at one end of the first pipe,
According to the operation piece, according to the position of the second pipe and the movement position of the third pipe, the locking means is moved in the radial direction to lock the third pipe and release the lock. Characterized vacuum cleaner. The lock means includes a lock member that allows the third pipe to be inserted and is movable in a predetermined radial direction, and a biasing member that biases the lock member in the predetermined radial direction. Forming a first recess or a locking hole on an inner wall surface, forming a first protrusion on the inner wall surface of the lock member opposite to the first recess or the locking hole with respect to the third pipe;
The third pipe is provided on the outer peripheral surface on one end side and engages with the first recess or the locking hole, and the outer peripheral surface on the other end side is opposite to the second protrusion with respect to the axis. And a second recess that engages with the first protrusion,
When the third pipe is moved to the extended position, the lock member moves in a predetermined radial direction so that the first protrusion of the lock member is engaged with the second recess of the third pipe. Lock the third pipe,
When the second pipe is stored in the storage position of the first pipe, the operation piece moves the lock member in a direction opposite to the predetermined radial direction to move the third pipe to the extended position. Unlock,
When the third pipe is stored in the storage position of the second pipe, the operation piece prevents the lock member from moving in a predetermined radial direction, and the first recess or the locking hole of the lock member is Engaging the second protrusion of the third pipe to lock the third pipe in the storage position;
The operation piece is configured to release the lock of the third pipe by moving the lock member in a predetermined radial direction when the second pipe is pulled out from a storage position of the first pipe. Item 2. The vacuum cleaner according to Item 1.

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