JP4673762B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner provided with a telescopic tube that can be expanded and contracted and a power supply line disposed along the telescopic tube.

  Conventionally, it has an outer tube and an inner tube that is slidably provided in the outer tube, and can be expanded and contracted, and can be expanded and contracted disposed in a cover provided along the outer tube and the inner tube. An extension tube for a vacuum cleaner having a pair of lead wires is known (for example, see Patent Document 1).

  In this extension tube for a vacuum cleaner, one end of the lead wire is fixed to the proximal end side of the outer tube, the other end is fixed to the distal end side of the inner tube, and one end is held on the proximal end side of the outer tube. Located in the guide pipe.

  When the inner tube is stored in the outer tube, the inner tube side cover is stored in the outer tube side cover, and the lead wire stored in the guide pipe is positioned inside the cover.

Further, when the inner tube protrudes from the outer tube, the other end side of the lead wire is pulled and extended by the inner tube, and the other end side is covered with the inner tube side cover in a state where it is exposed from the guide pipe. .
JP 2004-8239 A

  By the way, in the above-mentioned extension pipe for a vacuum cleaner, since it has a two-layer structure of an outer pipe and an inner pipe, the entire length becomes longer even when the inner pipe is housed in the outer pipe and contracted. There was a problem that the vacuum cleaner was difficult to store.

Further, since the pair of lead wires are exposed from the guide pipe when the inner tube protrudes from the outer tube, the exposed portions may come into contact with each other.
Accordingly, an object of the present invention is to provide a vacuum cleaner that can shorten the overall length when the telescopic tube is contracted and can reliably prevent contact between a pair of power supply lines when the telescopic tube is extended. Yes.

  In order to solve the above-mentioned problems, the present invention provides a telescopic telescopic tube provided between a hand operating part of a dust collecting hose connected to a cleaner body and a suction port, and an outer surface of the telescopic tube. A vacuum cleaner comprising a cover body provided along the longitudinal direction and a pair of extendable power supply lines disposed inside the cover body, wherein the telescopic tube includes a first pipe, At least a second pipe housed in the first pipe so that it can be pulled out, and a third pipe housed in the second pipe so that it can be pulled out. A first cover case extending to the vicinity of the other end, a second cover case that is retractably housed in the first cover case and extends from one end of the second pipe to the vicinity of the other end, and the second cover case Storable in a drawer And a third cover case extending from one end of the third pipe to the vicinity of the other end, the third cover case extending in the longitudinal direction with a predetermined gap therebetween and having a pair of open ends. The second cover case has a partition wall extending in the longitudinal direction and standing from the inner surface, and the guide tube extends along the partition wall. In addition to sliding, the pair of power supply lines are separated by the guide tube and / or the partition wall.

  According to the vacuum cleaner of the present invention, by shortening the length of each of the first to third pipes, it is possible to shorten the total length when the telescopic tube is contracted, and easily store it without getting in the way. Is possible.

  Further, when the telescopic tube is extended, the inside of the second cover case is partitioned by the partition wall, and it is possible to reliably prevent the pair of power supply lines located in the second cover case from contacting each other.

  Furthermore, when the third cover case is stored, the guide tube slides along the partition wall, so that the sliding operation of the guide tube can be performed smoothly and rattling can be prevented.

  Hereinafter, the best mode for carrying out a vacuum cleaner according to the present invention will be described with reference to the drawings.

  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.

  Further, a cover body T is provided on the outer surface of the extension tube 20 along the longitudinal direction, and a pair of power supply means 60 (see FIG. 4) described later is disposed inside the cover body T. ing.

  As shown in FIGS. 2 and 3, the extension pipe 20 includes a first pipe 21 that is detachably connected to the hand operation pipe 17, and a second pipe 30 that is detachably accommodated in the first pipe 21. The third pipe 40 is housed in the second pipe 30 so as to be drawable.

  And the connection pipe | tube 101 of the suction inlet body 100 is detachably connected to the front-end | tip part of this 3rd pipe 40 via the connection adapter 102 (refer FIG. 1).

  The first pipe 21 has a clamp case 22 attached to the lower side of the distal end portion 21 </ b> A, and the clamp case 22 is provided with a clamp member 23. By operating the clamp member 23, the second pipe 30 drawn from the first pipe 21 can be fixed at an arbitrary extension position.

  Further, a seal pipe 24 (see FIG. 2) that seals between the first pipe 21 and the second pipe 30 is attached to the distal end portion 21 </ b> A of the first pipe 21.

  The seal pipe 24 covers the distal end portion 21A of the first pipe 21 with a flange portion 24A.

  Further, a cover support portion 25 (see FIG. 3) is formed above the seal pipe 24 so as to protrude above the first pipe 21. The cover support portion 25 extends along the axial direction of the first pipe 21 and has a long hole 25A formed at the tip.

  Further, the rear end portion 21 </ b> B of the first pipe 21 is a connection portion (not shown) having a small diameter, and this connection portion is connected to the hand operation tube 17.

  A first cover case 26 to be described later is attached to the upper surface portion of the first pipe 21.

  As shown by an arrow in FIG. 3, the second pipe 30 is retractably accommodated in the first pipe 21 via the seal pipe 24 attached to the distal end portion 21 </ b> A of the first pipe 21. It has become.

  The second pipe 30 has a plurality of recesses (not shown) formed at equal intervals along the axial direction on the lower surface, and the clamp member 23 is engaged with any of these recesses. By combining, the second pipe 30 is fixed to an arbitrary extension length.

  Furthermore, a large-diameter joining pipe portion 32 is formed at the tip end portion (left end portion in FIG. 3) of the second pipe 30.

  And the front-end | tip part 33A of the 2nd cover case 33 mentioned later is attached to the upper surface part of this joining pipe part 32. FIG.

  Furthermore, the joining pipe part 32 of the second pipe 30 and the tip part 33A of the second cover case 33 are fitted into an annular decorative ring K as shown in FIGS. The joining pipe portion 32 and the second cover case 33 are sandwiched by the decorative ring K.

  In addition, a holding pipe 50 that seals between the second pipe 30 and the third pipe 40 is fitted into the joint pipe portion 32 of the second pipe 30.

  The holding pipe 50 is configured to cover the distal end portion 33 </ b> A of the second cover case 33 and the distal end of the second pipe 30 by the flange portion 51.

  Further, the flange portion 51 of the holding pipe 50 is formed so as to protrude above the second pipe 30, and an elongated hole 51 </ b> A is formed in the protruding portion.

  A lock member (not shown) is disposed in the holding pipe 50, and the third pipe 40 is fixed by engaging the lock member with the third pipe 40.

  The third pipe 40 is accommodated in the second pipe 30 so that the rear part 40B can be pulled out into the second pipe 30 via a holding pipe 50 attached to the tip of the second pipe 30 as indicated by an arrow in FIG. ing.

  The third pipe 40 has an engagement protrusion 41 formed on the upper surface of the tip portion (left end portion in FIG. 3) and an engagement recess (not shown) formed on the lower surface of the rear portion 40B. is doing. The engaging protrusion 41 engages with the lock member in the holding pipe 50 to fix the third pipe 40 in the storage position, and the engaging recess engages with the lock member in the holding pipe 50. By combining, when the third pipe 40 is pulled out, it is fixed at the extended position.

  Furthermore, a connecting pipe part 42 having a large diameter is formed at the tip of the third pipe 40, and the connecting adapter 102 is connected to the connecting pipe part 42. The engaging protrusion 41 is located behind the connecting pipe portion 42.

  A stand stopper 45 is attached between the connecting pipe portion 42 and the engaging protrusion 41.

  The stand stopper 45 includes a stopper piece 45 </ b> A positioned below the third pipe 40 and a cover holding portion 45 </ b> B positioned above the third pipe 40.

  The cover holding portion 45B holds a tip portion 47A of a third cover case 47 described later.

  The cover body T includes a first cover case 26 extending from the front end portion 21A to the vicinity of the rear end portion 21B along the extending direction of the first pipe 21, and is housed in the first cover case 26 so as to be able to be pulled out. A second cover case 33 extending from the front end portion to the vicinity of the rear end portion of the second pipe 30 along the extending direction of the second pipe 30, and housed in the second cover case 33 so as to be drawable and extending in the third pipe 40. And a third cover case 47 extending from the front end portion of the third pipe 30 to the vicinity of the rear end portion.

  As shown in FIG. 4A, the first cover case 26 is an arc-shaped long body that is open on the first pipe 21 side, and a plurality of claws 26 </ b> A are formed at the lower end along the longitudinal direction. The first cover case 26 is fixed so as to cover the upper surface of the first pipe 21 by engaging the claws 26 </ b> A with engaged portions (not shown) formed on the upper surface of the first pipe 21.

  Thereby, a first moving space 27 into which the second cover case 33 can be inserted and removed is formed between the first cover case 26 and the upper surface of the first pipe 21. The front end surface of the first moving space 27 faces the long hole 25 </ b> A of the cover support portion 25.

  In addition, a pair of 26B in Fig.4 (a) is a screw part for screwing the cover support part 25 with screws.

  The second cover case 33 has a front end portion 33A attached to the upper surface of the joining pipe portion 32 of the second pipe 30 and a rear portion 33B side inserted into the first moving space 27 through the elongated hole 25A of the cover support portion 25. Yes.

  When the second pipe 30 is pulled out from the first pipe 21, the second cover case 33 is pulled out from the first moving space 27 in accordance with the drawing.

  Here, a locking recess (not shown) is formed in the distal end portion 33A of the second cover case 33, and a locking protrusion (not shown) formed on the upper surface of the joining pipe portion 32 in the locking recess. Is fixed by locking.

  Since the second cover case 33 is attached to the large-diameter joining pipe portion 32, a portion located behind the joining pipe portion 32 and the second cover case 33 are not shown in FIG. As shown, a predetermined gap X is provided. Due to the gap X, when the second pipe 30 is accommodated in the first pipe 21, the second cover case 33 comes into sliding contact along the upper surface of the first pipe 21.

  Further, as shown in FIG. 4B, the second cover case 33 has a lower cover portion 34 </ b> A and an upper cover portion 34 </ b> B fixed on the lower cover portion 34. A second moving space 35 is formed between the lower cover portion 34A and the upper cover portion 34B, extending in the longitudinal direction and allowing the third cover case 47 to be inserted and removed. The front end surface of the second moving space 35 faces the long hole 51 </ b> A of the holding pipe 50.

  Further, the lower cover portion 34A is formed with a partition wall 36 extending in the longitudinal direction and standing from the inner surface toward the upper cover portion 34B, and the second moving space 35 is partitioned.

  In the partition wall 36, a gap S1 is provided between the front end surface 36A and the inner side surface of the upper cover portion 34B so that a later-described connecting wall 48Bc of the third cover case 47 can be inserted. The size of the gap S1 is smaller than the outer diameter of a coil-shaped power supply line 62 described later.

  Further, the partition wall 36 has a thickness slightly smaller than a gap S2 between a pair of guide holes 49 described later, and can be inserted into the gap S2.

  Here, a contact flange 34C that contacts the inside of the decoration ring K is formed at the tip of the upper cover portion 34B.

  The third cover case 47 has a front end portion 47 </ b> A held by the cover holding portion 45 </ b> B of the stand stopper 45, and a rear portion 47 </ b> B side inserted into the second moving space 35 through the elongated hole 51 </ b> B of the holding pipe 50.

  When the third pipe 40 is pulled out from the second pipe 30, the third cover case 47 is pulled out from the second moving space 35 in accordance with the drawing.

  As shown in FIG. 3, the third cover case 47 is held by the cover holding portion 45 </ b> B with a predetermined gap Y between the third cover case 47 and the upper surface of the third pipe 40. Due to this gap Y, when the third pipe 40 is accommodated in the second pipe 30, the third cover case 47 comes into sliding contact along the lower cover portion 34 </ b> A of the second cover case 33.

  Further, as shown in FIG. 4C, the third cover case 47 has a lower cover portion 48A and an upper cover portion 48B fixed on the lower cover portion 48A.

  The lower cover portion 48A includes a first lower guide portion 48Aa and a second lower guide portion 48Ab that extend in the longitudinal direction with a predetermined gap S2 therebetween. The first and second lower guide portions 48Aa and 48Ab are integrally connected by a connecting piece (not shown) provided at the tip portion. The connecting piece has the same shape as the cross-sectional shape of the upper cover portion 48B and does not interfere with the gap S2.

  The upper cover portion 48B connects the first upper guide portion 48Ba, the second upper guide portion 48Bb, and the first and second upper guide portions 48Ba, 48Bb extending in the longitudinal direction with a predetermined gap S2 therebetween. Wall 48Bc.

  Here, the first upper guide portion 48Ba is located on the first lower guide portion 48Aa, and the second upper guide portion 48Bb is located on the second lower guide portion 48Ab.

  As a result, the first upper and lower guide portions 48Aa and 48Ba and the second upper and lower guide portions 48Ab and 48Bb form a pair of guide tubes G1 and G2 that extend in the longitudinal direction with a gap S2 and open at both ends. .

  The guide tubes G1 and G2 have a pair of guide holes 49 in which a pair of power feeding means 60 are respectively disposed between the first upper and lower guide portions 48Aa and 48Ba and the second upper and lower guide portions 48Ab and 48Bb. is doing.

  The connecting wall 48Bc is bridged in the short direction of the first and second upper guide portions 48Ba and 48Bb and connects the upper portions of the first and second upper guide portions 48Ba and 48Bb.

  That is, the connecting wall 48Bc is bridged in the short direction of the third cover case 47, and the gap S2 is positioned below the connecting wall 48Bc. Further, the connecting wall 48Bc has a thickness slightly smaller than the gap S1, and can be inserted into the gap S1.

  The pair of power supply means 60 each have an insulating tube 61 formed of an insulating material and a power supply line 62 disposed in the insulating tube 61.

  The insulating tube 61 is a small-diameter tubular body, and one end 61 </ b> A (see FIGS. 6A and 6B) is locked and fixed to a locking portion (not shown) provided at the rear portion of the first cover case 26. The first cover case 26 is disposed in the first moving space 27.

  The insulating tube 61 is inserted into the second movement space 35 of the second cover case 33 when the second cover case 33 is accommodated in the first movement space 27, and the third cover case 47 is When stored in the second moving space 35, it is inserted into the guide hole 49 of the third cover case 47.

  The power supply line 62 has a coil shape without a cover and can be expanded and contracted, and one end 62 </ b> A (see FIGS. 6A and 6B) is provided in the first cover case 26 and is not shown. The other end 62B (see FIGS. 6A and 6B) is latched and fixed to a locking portion 47C (see FIG. 2) provided at the tip 47A of the third cover case 47. Yes.

  Further, a connection terminal 63A is connected to one end 62A of the power supply line 62, and this connection terminal 63A is connected to the inside of the cleaner body 11 via a lead wire (not shown) disposed in the hand operation tube 17 and the dust collecting hose 15. It is electrically connected to a power supply circuit (not shown). A connection terminal 63B is connected to the other end 62A of the feeder 62, and the connection terminal 63B is provided in the suction port body 100 via a lead wire (not shown) disposed in the connection adapter 102 and the connection pipe 101. The motor M is electrically connected.

  Further, a clamp C is provided at the tip 47A of the third cover case 47, and the operation of the clamp C locks or releases the connection between the third pipe 40 and the connection adapter 102. It has become.

  Next, operation | movement of the vacuum cleaner 10 comprised as mentioned above is demonstrated.

  First, when the extension pipe 20 is contracted to the shortest state, the second pipe 30 is accommodated in the first pipe 21 and the third pipe 40 is accommodated in the second pipe 30. Is done.

  At this time, the clamp member 23 of the first pipe 21 engages with a recess (not shown) located at the most distal end portion of the second pipe 30 to fix the second pipe 30 in the stored state. At the same time, a lock member (not shown) in the holding pipe 50 engages with the engagement protrusion 41 of the third pipe 40 to fix the third pipe 40 in the stored state.

  Further, as the second pipe 30 and the third pipe 40 are accommodated, the second cover case 33 is placed in the first moving space 27 of the first cover case 26 as shown in FIGS. A third cover case 47 is stored in the second movement space 35 of the second cover case 33.

  Here, since the partition wall 36 can be inserted into the gap S2, and the connecting wall 48Bc can be inserted into the gap S1, the partition wall 36 is inserted between the pair of guide tubes G1 and G2. It will be.

  Thus, when the third cover case 47 is inserted into and removed from the second cover case 33, the guide tubes G1 and G2 can be inserted and removed along the partition wall 36, thereby preventing the third cover case 47 from rattling. It becomes possible to insert and remove smoothly.

  On the other hand, at this time, as shown in FIG. 5 and FIG. 6A, the power supply means 60 is accommodated in the insulating tube 61 with the pair of power supply wires 62 contracted, and the guide hole of the third cover case 47. 49 is housed in each.

  Here, since the pair of power supply lines 62 are insulated from each other by the insulating tube 61, the power supply lines 62 can be reliably prevented from coming into contact with each other and short-circuiting.

  Furthermore, at this time, the insulation distance between the pair of power supply lines 62 is sufficiently secured by the guide tubes G1 and G2 and the partition wall 36.

  Next, when the extension pipe 20 is extended to the longest state, the substantially entire length of the second pipe 30 is drawn out from the first pipe 21 and the almost entire length of the third pipe 40 is drawn out from the inside of the second pipe 30. .

  At this time, the clamp member 23 of the first pipe 21 engages with a recess (not shown) located at the rearmost end portion of the second pipe 30 to fix the second pipe 30 in an extended state. At the same time, a lock member (not shown) in the holding pipe 50 engages with the engagement recess of the third pipe 40 to fix the third pipe 40 in an extended state.

  Further, as the second pipe 30 and the third pipe 40 extend, the second cover case 33 is pulled out from the first moving space 27 of the first cover case 26 as shown in FIG. A third cover case 47 is pulled out from the second movement space 35 of the two cover cases 33.

  At this time, the power supply line 62 of the power supply means 60 is extended along the first to third cover cases 26, 33, 47 by the other end 62 </ b> B being pulled by the extension operation of the third cover case 47.

  On the other hand, since the power supply tube 61 of the power supply means 60 has one end 61A fixed to the first cover case 26, the power supply tube 61 moves backward relative to the third cover case 47 and the second cover case 33. Arranged in the first cover case 26.

  As a result, the pair of power supply lines 62 are positioned in the insulating tube 61 in the first moving space 27 of the first cover case 26, respectively, and are kept in an insulated state without contacting each other.

  Further, these feeders 62 are positioned in the guide holes 49 extending in the longitudinal direction with a predetermined gap S2 in the third cover case 47, so that the insulated state is maintained without contacting each other. The Here, the insulation distance between the pair of power supply lines 62 is sufficiently secured by the guide tubes G1 and G2.

  Furthermore, as shown in FIG. 7, these power supply lines 62 are partitioned by the partition wall 36 in the second moving space 35 of the second cover case 33, and are kept in an insulated state without contacting each other. . Here, the insulation distance between the pair of power supply lines 62 is sufficiently secured by the partition wall 36.

  Since the gap S1 between the front end surface 36A of the partition wall 36 and the inner side surface of the upper cover portion 34B is smaller than the outer diameter of the power supply line 62, the power supply line 62 is within the second moving space 35. Even if it moves, it cannot get over the partition wall 36 and can be insulated reliably.

  As described above, in the electric vacuum cleaner 10 according to the present invention, the extension pipe 20 includes the first pipe 21, the second pipe 30 accommodated in the first pipe 21 so as to be drawable, and the second pipe. The cover body T includes at least a third pipe 40 accommodated in the drawer 30 so that it can be pulled out. The cover T extends from one end of the first pipe 21 to the vicinity of the other end, and the first cover case 26. A second cover case 33 that is retractably housed and extends from one end of the second pipe 30 to the vicinity of the other end, and an end of the third pipe 40 that is retractably housed in the second cover case 33. And a third cover case 47 extending from the other end to the vicinity of the other end. The third cover case 47 extends in the longitudinal direction with a predetermined gap therebetween and has a pair of guides open at both ends. The second cover case 33 has a partition wall 36 extending in the longitudinal direction and standing from the inner surface, and includes a partition wall 36Bc that connects the guide tubes G1 and G2. The guide tubes G1, G2 slide along the line 36, and the pair of power supply lines 62 are separated by the guide tubes G1, G2 and / or the partition wall 36.

  With this configuration, when the extension pipe 20 is stored, the first to third pipes 21, 30, and 40 can be stored in order, and the first to third cover cases 26, 33, and 47 can be stored in order. The total length of the extension tube 20 when contracted can be shortened.

  Therefore, when the vacuum cleaner 10 is stored, the extension tube 20 does not get in the way, and the vacuum cleaner 10 can be stored easily.

  Further, when the extension tube is extended, the second moving space 35 of the second cover case 33 can be partitioned by the partition wall 36, and the pair of power supply lines 62 positioned in the second cover case 33 are connected to each other. It is possible to reliably prevent contact and prevent a short circuit.

  Furthermore, when the third cover case 47 is stored, the guide tubes G1 and G2 slide along the partition wall 36, so that the sliding operation can be performed smoothly and rattling can be prevented.

  In the vacuum cleaner 10 according to the present invention, the connecting wall 48Bc of the third cover case 47 is bridged in the short direction of the third cover case 47, and the tip surface 36A of the partition wall 36 and the second cover case 33 are A gap S1 into which the connecting wall 48Bc can be inserted is provided between the inner surface of the upper cover portion 34B facing the tip surface 36A.

  With this configuration, when the third cover case 47 is stored in the second moving space 35 of the second cover case 33, the partition wall 36 and the connecting wall 48Bc can be stored smoothly without interference.

  Moreover, the partition wall 36 can be provided over almost the entire length of the second moving space 35, and the contact between the pair of power supply lines 62 can be reliably prevented.

  Further, the guide tubes G1 and G2 extending in the longitudinal direction can be reinforced by the connecting wall 48Bc, and the strength of the third cover case 47 can be improved.

  In the electric vacuum cleaner 10 according to the present invention, the partition wall 36 is inserted into the gap S <b> 2 between the pair of guide holes 49 when the third cover case 47 is accommodated in the second cover case 33. It has become.

  With this configuration, when the third cover case 47 is inserted into and removed from the second cover case 33, the third cover case 47 can be inserted and removed along the partition wall 36. It becomes possible to do.

  In addition, 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.

  In this case, a plurality of second pipes 30 and second cover cases 33 are provided. Further, at this time, as shown in FIG. 8, the partition wall 36 ″ of the second cover case 33 ″ located on the third pipe 40 side and the partition wall of the second cover case 33 ′ located on the first pipe 21 side are provided. A slit SL into which 36 'enters is provided.

  Accordingly, when the extension tube 20 is in a contracted state, the partition wall 36 ′ and the partition wall 36 ″ do not interfere with each other and can be contracted smoothly.

  Furthermore, in the above-described embodiment, the large-diameter connecting pipe portion 42 is formed at the suction-side tip portion of the third pipe 40, but the suction-side tip portion 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 a disassembled perspective view of an extension pipe. (A) is BB sectional drawing in FIG. 3, (b) is CC sectional drawing in FIG. 3, (c) is DD sectional drawing in FIG. It is AA sectional drawing in FIG. (A) is explanatory drawing which shows the positional relationship of the cover body and electric power feeding means at the time of extension pipe contraction, (b) is explanatory drawing which shows the positional relationship of the cover body and electric power feeding means at the time of extension pipe extension. It is sectional drawing which showed the inside of the 2nd cover case at the time of extension pipe extension. It is sectional drawing at the time of shrinkage | contraction when an extension pipe | tube is 4 steps | paragraphs.

Explanation of symbols

20 Extension pipe (expandable pipe)
21 1st pipe 30 2nd pipe 40 3rd pipe 26 1st cover case 33 2nd cover case 36 Bulkhead 47 3rd cover case 48Bc Connecting wall 62 Feeding line G1, G2 Guide pipe

Claims (3)

A telescopic telescopic tube provided between the hand-operated part of the dust collecting hose connected to the vacuum cleaner body and the suction port body, and a cover body provided along the longitudinal direction on the outer surface of the telescopic tube; A vacuum cleaner comprising a pair of extendable power supply lines arranged inside the cover body,
The telescopic tube includes at least a first pipe, a second pipe accommodated in the first pipe so as to be drawable, and a third pipe accommodated in the second pipe so as to be drawable.
The cover body includes a first cover case extending from one end portion of the first pipe to the vicinity of the other end portion, and is housed in the first cover case so as to be drawable, and from the one end portion of the second pipe to the vicinity of the other end portion. A second cover case extending to the second cover case, and a third cover case that is housed in the second cover case so as to be drawable and extends from one end of the third pipe to the vicinity of the other end.
The third cover case has a pair of guide tubes that extend in the longitudinal direction with a predetermined gap therebetween and open at both ends, and a connecting wall that connects these guide tubes,
The second cover case has a partition wall extending in the longitudinal direction and erected from an inner surface, the guide tube slides along the partition wall, and the pair of power supply lines are connected to the guide tube and / or the A vacuum cleaner characterized by being separated by a partition wall.   The connecting wall is bridged in the short direction of the third cover case, and the connecting wall can be inserted between the front end surface of the partition wall and the inner side surface of the second cover case facing the front end surface. The vacuum cleaner according to claim 1, wherein a gap is provided.   The vacuum cleaner according to claim 1 or 2, wherein the partition wall is fitted between the pair of guide tubes when the third cover case is housed in the second cover case.

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