JP2011019624A - Extension pipe for cleaner, and vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an extension pipe for a vacuum cleaner which can restrain a floor surface to be cleaned from getting damaged by an engagement tool when the lower side space of furniture such as a bed is cleaned, and can improve workability in cleaning the lower side space of the furniture, and is suitable for surely sucking dust up to the depth of the lower side space. <P>SOLUTION: The extension pipe 31 for a cleaner has a pipe body 32, and an engagement member 41 removably hooked onto the extension pipe support 11 of a cleaner body. The pipe body 32 is provided with a member attachment portion having a circular periphery and positioning portions 35 located on both sides of the attachment portion. The engagement member 41 has an engagement portion 42 and a hooking portion 43. The engagement portion 42 is prevented from moving in the axial direction of the pipe body 32 by the positioning portions 35 and the engagement portion 42 is engaged with the outer periphery of the member attachment portion so as to allow it to move in the peripheral direction of the pipe body 32. The hooking portion 43 is projected from the engagement portion 42 in the direction of separation from the pipe body 32. The engagement member 41 is designed to rotate in the peripheral direction of the pipe body 32 when the hooking portion 43 comes into contact with a floor surface to be cleaned during cleaning. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an extension tube that is hooked and supported by a cleaner body in a state of standing in the vertical direction, and to a vacuum cleaner that includes this extension tube.

  2. Description of the Related Art An extension pipe having an upper and lower two-joint type, in which a locking tool (connecting tool) having a flange portion is attached to the extension lower pipe, is known as a prior art (see, for example, Patent Document 1). .) The locking member is fixed to the extended lower tube so as not to move in the axial direction and also in the circumferential direction.

  In the vacuum cleaner main body of the vacuum cleaner provided with the extension pipe, a hook receiving portion having an opening opening forward is formed on the bottom surface facing the floor surface to be cleaned in a normal use state. Yes. And when storing a vacuum cleaner etc., an extension pipe is hooked and supported by the vacuum cleaner main body using a hook receiving part and a locking tool.

  That is, the hose, the extension pipe, and the floor nozzle are connected to each other, and with the hose connected to the suction port of the cleaner body, the cleaner body is in a standing position with the rear part at the bottom. After that, the hook of the locking tool fixed to the extension pipe is inserted into the hook receiving part of the cleaner body from above and hooked to clean the extension pipe so that it stands up and down. It can be hooked and supported by the machine body.

Japanese Patent Laid-Open No. 4-64329 (prior art column, FIG. 12)

  In the conventional technique, the hook part of the locking tool fixed to the extension lower pipe protrudes downward with respect to the extension lower pipe in a normal cleaning state, so when cleaning under furniture such as a bed or sofa. There are the following problems.

  That is, when cleaning the bottom of a bed or the like, generally, the extension pipe connected to the hand part is cleaned by operating the hand part of the hose gripped by the user to a lower position. Cleaning is performed so as to be as parallel as possible to the target floor surface. In this case, the hook part of the locking tool fixed to the extension lower pipe of the extension pipe may come into contact with the floor surface to be cleaned.

  When cleaning under the bed etc., the bed etc. hinders the visual recognition of the floor nozzle and the locking tool, so that the extension pipe and the floor nozzle are in the front-rear direction with the buttocks of the locking tool in contact with the floor surface to be cleaned The flooring made of flooring to be cleaned may be damaged as it is pushed and pulled. In order to suppress such scratches on the floor surface, it is necessary to perform cleaning while confirming whether or not the hook portion of the locking tool is in contact with the floor surface, so that cleaning becomes troublesome. And since there is a high possibility that it will be hesitant to push the floor nozzle deeply into the lower space of the bed or the like so as to be afraid of scratching the floor surface, it is not preferable in terms of cleaning work. Furthermore, when the floor nozzle is pushed deep into the lower space of the bed or the like without noticing that the hook part of the locking tool has come into contact with the floor surface to be cleaned, the locking is in contact with the floor surface. The floor nozzle may be lifted from the floor using the tool as a fulcrum, and may not be able to absorb dust in a deep space in the lower space of furniture such as a bed.

  As described above, the conventional extension pipe is a floor surface to be cleaned by a locking tool provided to hook and support the lower space of the furniture such as a bed while standing on the cleaner body. In addition, there is a problem that workability in cleaning while suppressing the damage is not good, and it is difficult to reliably absorb dust in a deep place in the lower space.

  In order to solve the above-described problems, an extension pipe for a vacuum cleaner according to the present invention has a pipe body, a fitting section, and a hook section protruding from the fitting section in a direction away from the pipe body. And an engaging member that is detachably hooked to the extension tube support portion of the vacuum cleaner main body, and a member mounting portion that forms a circular outer peripheral surface and positioning portions that are positioned on both sides of the mounting portion. And the fitting portion is fitted to the outer periphery of the member mounting portion so that the fitting portion can be moved in the circumferential direction of the tube body. It is said.

  According to the present invention, when the hooking portion of the engaging member comes into contact with the floor to be cleaned during cleaning, the engaging member is rotated in the circumferential direction of the tubular body. When cleaning the floor, it is possible to prevent the floor surface to be cleaned from being damaged by the engaging member, improve workability for cleaning the lower space, and reliably absorb the dust in the deep space of the lower space. There is an effect that it is possible to provide an extension pipe for a vacuum cleaner suitable for the above.

It is a perspective view which shows the vacuum cleaner which concerns on 1st Embodiment of this invention in a use condition. It is a perspective view which shows the vacuum cleaner which concerns on 1st Embodiment in the state suitable for storage. It is a perspective view which shows the extension pipe support part and engagement member isolate | separated from this of the vacuum cleaner which concerns on 1st Embodiment. It is sectional drawing which follows the F4-F4 line | wire in FIG. It is sectional drawing which shows a part of extension tube with which the vacuum cleaner which concerns on 1st Embodiment is provided. It is sectional drawing which follows F6-F6 line in FIG. It is sectional drawing which shows the extension pipe with which the vacuum cleaner which concerns on 2nd Embodiment of this invention is provided. FIG. 8 is a cross-sectional view taken along line F8-F8 in FIG. It is a perspective view which shows the extension pipe support part and engagement member isolate | separated from this of the vacuum cleaner which concerns on 3rd Embodiment of this invention. It is sectional drawing which follows the F10-F10 line | wire in FIG. It is sectional drawing which shows the extension pipe support part and engagement member isolate | separated from this of the vacuum cleaner which concerns on 4th Embodiment of this invention. It is sectional drawing which shows the state by which the engaging member was supported by the extension pipe support part of the vacuum cleaner which concerns on 4th Embodiment. It is sectional drawing which follows F13-F13 line | wire in FIG.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.

  In FIG. 1 and FIG. 2, reference numeral 1 denotes a vacuum cleaner, and this vacuum cleaner 1 includes a cleaner body 2 and a dust-absorbing air passage body 21.

  A suction port 3 is provided in the front part of the cleaner body 2, and an electric blower 4 is built in the rear part of the cleaner body 2. The vacuum cleaner body 2 has a dust collection chamber (not shown) at the front thereof. The upper end of the dust collecting chamber is opened, and this opening is closed by a body lid 5 that is rotatably attached to the cleaner body 2. The main body lid 5 is provided with a suction port 3. In the dust collection chamber, for example, a dust collection bag (not shown) is accommodated as a dust collection portion so that it can be put in and out, and the internal space of the dust collection bag communicates with the suction port 3.

  A swirling wheel (not shown) is turnably attached to the front portion of the bottom wall 2a (see FIGS. 2 and 3) of the cleaner body 2 facing the floor surface to be cleaned during cleaning. Wheels 6 are respectively attached to both sides of the rear portion of the vacuum cleaner body 2. The vacuum cleaner body 2 can be easily moved on the floor surface by the rotation of the swivel wheel and the wheel 6. As shown in FIG. 2, the vacuum cleaner body 2 can be placed on the floor or the like with its rear portion as the bottom, and in the case of this vertical installation, the rear-facing placement of the rear wall of the vacuum cleaner body 2 The convex portion 2b (see FIG. 1) for use and the wheel 6 come into contact with the floor surface, and the cleaner body 2 is supported. The bottom wall 2a of the vacuum cleaner body 2 is erected substantially vertically in the state of being placed vertically.

  As shown in FIGS. 2 to 4, an extension tube support portion 11 is formed on the bottom wall 2 a. The extension pipe support part 11 includes a hook part receiver 12, a concave part 13, and a groove part 14. The hook receiving part 12 is provided so that an engagement member 41 described later can be hooked and disengaged from above in a state where the cleaner body 2 is vertically placed (standing position). The concave portion 13 is formed on the back side of the hook portion receiver 12. As shown in FIG. 4, the recess 13 is provided so that the opening faces upward in a state where the cleaner body 2 is placed vertically. The groove portion 14 is continuously provided on the upper side of the recessed portion 13 in a state where the cleaner body 2 is vertically placed. The groove portion 14 has an inclined surface 14 a for facilitating the insertion and removal of a hook portion 43 described later with respect to the recess portion 13. The inclined surface 14 a is oblique and faces the opening of the recess 13.

  As shown in FIG. 1, the dust suction air passage body 21 includes a dust suction hose 22, an extension pipe 31, and a suction port body 25.

  One end 22 a of the dust suction hose 22 is detachably connected to the suction port 3 of the cleaner body 2. The other end of the dust suction hose 22 is formed by a proximal tube 22b, and a handle 23 is provided on the proximal tube 22b. An operation panel 24 to which various operation switches for giving instructions for controlling the operation of the electric blower 4 are attached to the handle 23. A portion between one end 22a of the dust suction hose 22 and the proximal tube 22b is formed of a bellows-like hose member having mobility.

  The extension pipe 31 is, for example, a double-joint type, and includes a pipe body, that is, an upstream pipe body 32 and a downstream pipe body 33. The upstream tube body 32 is fitted inside the downstream tube body 33, and is provided so as to be movable in the axial direction of the downstream tube body 33. The total length of the extension pipe 31 can be changed by arbitrarily adjusting the protruding length of the upstream pipe 32 from the tip of the downstream pipe 33. The other end of the downstream tube 33 opposite to the tip is detachably fitted and connected to the tip of the proximal tube 22b.

  As shown in FIGS. 5 and 6, the tube body of the extension tube 31, for example, the upstream tube body 32 has a member mounting portion 34 and a pair of positioning portions 35 in the lower portion. The member attachment portion 34 is formed by a part of the upstream side pipe body 32, and the outer peripheral surface of the member attachment portion 34 is circular. The positioning portions 35 are located on both sides of the member mounting portion 34 and project integrally with the outer peripheral surface of the upstream tube body 32. These positioning portions 35 are continuously formed once in the circumferential direction of the upstream tubular body 32.

  Further, the extension pipe 31 includes an engaging member 41 made of synthetic resin. As shown in FIGS. 5 and 6, the engaging member 41 includes a synthetic resin fitting portion 42, a synthetic resin hook portion 43, and a protective cover 45.

  The fitting portion 42 is fitted to the outer periphery of the member mounting portion 34 so as to be movable in the circumferential direction of the upstream tube body 32. Both ends of the fitting portion 42 in the axial direction are in slight contact with or in close contact with the positioning portion 35 and are positioned by the positioning portion 35 so as not to move in the axial direction of the upstream side tubular body 32.

  The hook portion 43 is integrally protruded from the fitting portion 42 in a direction away from the upstream tube 32, and has, for example, an engagement end portion 43a to form a substantially L-shaped hook in side view. Yes. The engaging end 43a is substantially parallel to the upstream tube 32, and is bent toward the suction port 25 connected to the front, that is, the tip of the upstream tube 32. When the hooking portion 43 is viewed from the front side or the rear side, the width of the tip side portion of the hooking portion 43 is gradually narrowed toward the tip of the hooking portion 43. In other words, the tip side portion of the hook portion 43 is formed in a tapered shape toward the tip of the hook portion 43, and in this embodiment, has a substantially semicircular shape as shown in FIG. By hooking the hook 43 on the extension pipe support 11 of the vacuum cleaner main body 2 placed vertically, the extension pipe 31 can be erected and supported on the cleaner main body 2. Yes.

  The protective cover 45 is attached to at least the outer surface of the front end side portion of the hook portion 43, more precisely, the both side surfaces of the front end side portion. The protective cover 45 is made of a cushioning material softer than the flooring made of flooring to be cleaned and the hooking portion 43, such as a raised cloth, an elastomer, and soft vinyl chloride.

  The suction port body 25 is for a floor suitable for cleaning the floor surface to be cleaned, and includes a suction head 26 and a connection pipe 27.

  The suction head 26 has a dust suction opening (not shown) on its lower surface. The suction head 26 may include a rotating cleaning body that is rotated by an airflow flowing through the suction head 26 or an electric motor mounted on the suction head 26. The connection pipe 27 is connected to the central portion of the suction head 26 via a universal joint portion 28 and protrudes rearward of the suction head 26. The connecting pipe 27 communicates with the dust suction opening of the suction head 26 via the inside of the universal joint portion 28. The suction port body 25 is detachably fitted to and connected to the distal end portion of the upstream tube body 32 that forms the distal end portion of the extension pipe 31.

  When the electric vacuum cleaner 1 is stored, the extension pipe 31 is supported by the cleaner main body 2 as shown in FIG. That is, first, the cleaner body 2 is set in a vertical state. That is, the vacuum cleaner body 2 is raised so that its rear portion is the bottom, and the vacuum cleaner body 2 is supported in a standing state by the convex portions 2 b and the wheels 6. This operation is performed in a state where the dust suction air passage body 21 remains connected to the suction port 3 of the cleaner body 2. Next, the extension pipe 31 is operated so that the engagement end portion 43a of the hook portion 43 included in the engagement member 41 faces downward, and the hook portion 43 of the engagement member 41 is moved to the vacuum cleaner main body 2. Hook the extension tube support 11 from above. In this case, the hook portion 43 is guided downward by the inclined surface 14a of the groove portion 14 of the cleaner body 2, and accordingly, the engaging end portion 43a of the hook portion 43 is inserted into the concave portion 13 of the cleaner body 2 from above. The hook 43 is hooked on the hook receiver 12. With this catch, the extension pipe 31 is arranged so as to extend vertically as shown in FIG. 2 and supported along the bottom wall 2 a of the cleaner body 2. At the same time, the suction head 26 of the suction port body 25 is arranged so as to be perpendicular to the connection pipe 27 arranged so as to extend vertically with the extension pipe 31. In this state, the vacuum cleaner 1 is stored in an appropriate storage location.

  Further, when the vacuum cleaner 1 is used, the hook portion 43 of the engaging member 41 can be detached from the extension tube support portion 11 of the cleaner body 2 by pulling up the extension tube 31. Then, the vacuum cleaner main body 2 is disposed so that the bottom wall 2a faces the flooring floor to be cleaned, and a dust suction air passage body 21 is disposed as shown in FIG. The floor surface can be cleaned by moving the suction port body 25 while driving the electric blower 4. In many cleaning scenes, the angle between the extension pipe 31 and the floor surface is large. Therefore, although the engagement member 41 protrudes to the lower side of the extension pipe 31, the engagement member 41 is connected to the floor surface. Never touched.

  However, when cleaning the floor surface under the bed (not shown), the suction mouth body is lowered with the hand operating the dust suction air passage body 21 so that the suction mouth body 25 is inserted deeply into the space below the bed. 25 is moved back and forth. In such cleaning, since the angle between the extension pipe 31 and the floor surface becomes small, the engaging member 41 of the extension pipe 31 may contact the floor surface.

  With this contact, the engaging member 41 is pushed on the floor surface. As a result, the engaging member 41 is rotated in the circumferential direction of the upstream tubular body 32, so that the operation of lowering the hand holding the handle 23 of the dust suction air passage body 21 is prevented by the engaging member 41. Can be suppressed. Therefore, the floor under the bed can be cleaned by moving the suction port body 25 back and forth in a state where the hand operating the dust suction air passage body 21 is lowered. Further, even if the hand is lowered, the engaging member 41 is rotated in the circumferential direction of the upstream side tubular body 32 correspondingly, so that the engaging member 41 is in contact with the floor surface. The suction port body 25 is also prevented from floating from the floor surface with the engaging member 41 as a fulcrum.

  For this reason, when cleaning the floor surface under furniture such as a bed, whether or not the engaging member 41 is in contact with the floor surface and whether or not the suction port body 25 is lifted from the floor surface. It can be cleaned without having to worry about it, and it can be cleaned by inserting the suction port 25 that is inserted deep into the space below the furniture such as a bed. Therefore, it is possible to improve the workability and the certainty of cleaning the floor surface under furniture such as a bed.

  And since the front-end | tip part of the engaging member 41 is covered with the protective cover 45 and this protective cover 45 touches a floor surface, it can suppress that a flooring floor surface is damaged by the contact with the engaging member 41. FIG. Also in this respect, the workability of cleaning the floor surface under the furniture such as a bed can be improved.

  7 and 8 show a second embodiment of the present invention. Since the second embodiment is the same as the first embodiment except for the items described below, the same reference numerals as those in the first embodiment are assigned to the same configurations as those in the first embodiment, and the description thereof is omitted.

  In the second embodiment, the entire hooking portion 43 of the engaging member 41 has a tapered shape, for example, a substantially triangular shape as shown in FIG. By adopting such a shape, the stability of the engaging member 41 when the engaging member 41 comes into contact with the flooring made of flooring becomes extremely low. The side tube body 32 can be rotated in the circumferential direction.

  Furthermore, in the second embodiment, the holding means 36 that holds the hook 43 in a state where the hook 43 is protruded to a predetermined position around the upstream pipe 32 in a state where the hook 43 does not contact the flooring made of flooring. It has. Here, the predetermined position around the upstream tube 32 where the hook 43 is held is related to the suction port body 25 (see FIGS. 1 and 2) connected to the tip of the upstream tube 32. Specifically, it points to the position where the hooking portion 43 protrudes on the opposite side of the suction port body 25 with the upstream side pipe body 32 as a boundary. Therefore, the hooking portion 43 is held in a state where it is perpendicular to the upstream side pipe body 32 and protrudes downward while being cleaned.

  As shown in FIGS. 7 and 8, the holding means 36 includes, for example, a spring arrangement groove 37, a notch groove 38, a holding portion 39, and an urging body such as a spring, specifically a torsion coil spring 40.

  The spring arrangement groove 37 is formed in the fitting portion 42 so as to open to the inner periphery thereof. The notch groove 38 communicates with the spring arrangement groove 37 and is formed in the fitting portion 42. The notch groove 38 is provided on the side opposite to the side from which the hooking portion 42 is projected, and is open to the outer peripheral surface of the fitting portion 42. The holding part 39 is integrally formed from the tube body of the extension pipe 31, that is, one positioning part 35 of the upstream pipe body 32, and covers the notch groove 38.

  As shown in FIG. 7, the holding portion 39 has stopper edge portions 39a and 39b at both ends in the width direction, and these stopper edge portions 39a and 39b are bent toward the outer periphery of the fitting portion 42. There is no contact with the outer periphery of the joint portion 42. The torsion coil spring 40 is wound around the outer peripheral surface of the member mounting portion 34 and is accommodated in the spring arrangement groove 37. The torsion coil spring 40 has a pair of spring end portions 40 a and 40 b that project toward the holding portion 39 through the notch groove 38.

  One spring end 40a is pressed against one groove edge 42a and one stopper edge 39a of the fitting part 42 defining the notch groove 38 by the spring force of the torsion coil spring 40. These one groove edge part 42a and one stopper edge part 39a can be contacted / separated. Similarly, the other spring end portion 40 b is pressed against the other groove edge portion 42 b and the other stopper edge portion 39 b of the fitting portion 42 defining the notch groove 38 by the spring force of the torsion coil spring 40. However, it is possible to contact and separate from the other groove edge 42b and the other stopper edge 39b.

  The torsion coil spring 40 of the holding means 36 is configured so that the spring force in the direction in which the pair of spring end portions 40a and 40b are separated from each other with the spring end portions 40a and 40b hitting the stopper edge portions 39a and 39b, respectively. 42a and 42b. In other words, the engaging member 41 is urged by the torsion coil spring 40 in the movable direction. Thereby, in a free state where no external force acts on the hooking portion 42 of the engaging member 41, the engaging member 41 can be held in a state of protruding to a predetermined position around the upstream side tubular body 32.

  Such holding can prevent the engaging member 41 from rotating freely during cleaning. At the same time, after the engaging member 41 is rotated with respect to the upstream tube 32, the engaging member 41 is naturally returned to a predetermined position by the spring force of the torsion coil spring 40. Therefore, when the extension pipe 31 is hooked and held on the cleaner body 2 (see FIG. 2), there is no need to adjust the positional relationship between the engaging member 41 and the suction port body 25 (see FIG. 2). The engaging member 41 can be hooked on the extension tube support portion 11 (see FIG. 2) of the cleaner body 2.

  The spring force of the torsion coil spring 40 is not so great. For this reason, when cleaning the floor surface below furniture such as a bed, if the tip of the hook 43 of the engagement member 41 hits the floor surface, the engagement member 41 is twisted accordingly and the spring force of the coil spring 40 is increased. Against this, it can be rotated in the circumferential direction of the upstream tubular body 32.

  In this case, when an external force in the direction of arrow R in FIG. 7 is applied to the hooking portion 43 of the engaging member 41 from the floor surface side, one groove edge portion 42a pushes one spring end portion 40a, and this spring end The engaging member 41 is rotated while bringing the portion 40a close to the other spring end portion 40b positioned by the stopper edge 39b. At the same time, the other groove edge 42b is separated from the other spring end 40b. When the hook 43 is separated from the floor surface after this rotation, the engaging member 41 is returned to a state where the engaging member 41 protrudes to a predetermined position around the upstream tube 32 by the spring force of the torsion coil spring 40. Similarly, when an external force in the direction of the arrow L in FIG. 7 is applied to the engaging member 41 from the floor surface side, the other groove edge portion 42b pushes the other spring end portion 40b, and this spring end portion 40b is moved to the stopper edge. The engaging member 41 is rotated while approaching one spring end 40a positioned by the portion 39a. At the same time, one groove edge 42a is separated from one spring end 40a. When the hook 43 is separated from the floor surface after this rotation, the engaging member 41 is returned to a state where the engaging member 41 protrudes to a predetermined position around the upstream tube 32 by the spring force of the torsion coil spring 40.

  Except for the matters described above, the second embodiment is the same as the first embodiment. Therefore, even the second embodiment can solve the problem of the present invention.

  9 and 10 show a third embodiment of the present invention. Since the third embodiment is the same as the first embodiment except for the items described below, the same reference numerals as those in the first embodiment are assigned to the same configurations as the first embodiment, and the description thereof is omitted.

  In 3rd Embodiment, the front side site | part of the bottom wall 2a of the cleaner body 2 is the curved surface 2c. And instead of providing the inclined surface 14a (refer FIG. 6) in the groove part 14 of the extension pipe support part 11, the groove part 14 of the extension pipe support part 11 is open | released by the curved surface 2c. Thereby, in 3rd Embodiment, the hook part 43 of the engaging member 41 can be inserted / removed now from the upper part with respect to the extension pipe support part 11 of the cleaner body 2 placed vertically.

  Furthermore, in the third embodiment, the entire hooking portion 43 is tapered so that the engaging member 41 can be more easily rotated in the circumferential direction of the upstream tube body 32, for example, a substantially triangular shape as shown in FIG. I am doing. At the same time, the width of the groove portion 14 of the extension tube support portion 11 that receives the hook portion 43 is gradually narrowed toward the back of the groove portion 14, whereby the groove portion 14 has a cross-section as shown in FIG. 10, for example. It is substantially V-shaped.

  Thereby, even when the position of the engaging member 41 is slightly deviated from the groove portion 14 when the hook portion 43 is inserted into the concave portion 13 via the groove portion 14 and is hooked on the hook portion 14, The engagement member 41 can be supported by the extension tube support portion 11 without requiring time and effort for correcting the shift.

  That is, as long as the front end portion of the hook portion 43 of the engaging member 41 that is slightly displaced enters the groove portion 14, the hook portion 43 comes into contact with the side surface of the groove on which the groove portion 14 is formed. The engaging member 41 is rotated in the circumferential direction of the upstream tubular body 32 while the distal end portion of the shape is guided toward the center of the groove portion 14 in the substantial direction. As a result, the position of the engaging member 41 with respect to the groove portion 14 is corrected so as to be appropriate, so that no effort is required to correct the position of the engaging member 41 regardless of the slight displacement. Then, following this state, the engaging member 41 in which the hooking portion 43 is inserted into the groove portion 14 is lowered together with the upstream tube 32, whereby the hooking portion 43 can be hooked on the hooking portion receiver 12. .

  Except for the matters described above, the second embodiment is the same as the first embodiment. Therefore, this third embodiment can also solve the problems of the present invention.

  11 to 13 show a fourth embodiment of the present invention. Since the fourth embodiment is the same as the first embodiment except for the items described below, the same reference numerals as those in the first embodiment are assigned to the same configurations as those in the first embodiment, and the description thereof is omitted.

  The vacuum cleaner main body of the fourth embodiment further includes a lock means 51. The lock means 51 includes a rotation stop surface 34a, a lock member 52, and an urging member such as a spring 55, and the engagement member 41 is engaged with the extension pipe support portion 11 with respect to the engagement member 41. Thus, the upstream pipe body 32 is constrained so as not to rotate, and the restraint is released as the engaging member 41 is removed from the extension pipe support portion 11.

That is, the rotation stop surface 34 a is formed by a flat surface provided at a part of the member mounting portion 34 of the upstream side pipe body 32. In addition, when the engaging member 41 is hooked on the extension tube support portion 11 from above, the hooking member 52 in the pair of positioning portions 35 is arranged so that the lock member 52 does not interfere with the upstream tube body 32. The positioning part 35 and the fitting part 42 which are positioned on the lower side during the operation are
An escape portion 53 is provided. These escape portions 53 are provided so as to cut out a part of the positioning portion 35 and the fitting portion 42 at the lower position, and when the engaging member 41 is hooked on the extension tube support portion 11, It is designed to be continuous in the direction.

  The lock member 52 has a pair of arm portions 52a having a rod shape and a rod-like detent portion 52b sticking over one end portion thereof, and is formed in a substantially U shape in plan view as shown in FIG. ing. As shown in FIGS. 11 and 12, the other end portion of the arm portion 52 a of the lock member 52 is rotatably attached to, for example, a root portion of the engagement end portion 43 a of the engagement member 41. In FIG. 11 to FIG. 13, reference numeral 54 indicates a pivot that is a fulcrum of rotation of the lock member 52. The length of the arm portion 52a is set so that the anti-rotation portion 52b comes into contact with and separates from the anti-rotation surface 34a as the lock member 52 is rotated.

  The spring 55 is wound around both ends of the pivot 54, and one end thereof is hooked on the arm portion 52 a and the other end is hooked on the engagement end portion 43 a of the engagement member 41. The lock member 52 is urged by the spring force of the spring 55 in a direction in which the rotation preventing portion 52 b is separated from the upstream tube body 32.

  The lock means 51 having such a configuration operates as follows when the extension pipe is supported upright on the vertically disposed cleaner body.

  That is, when the engaging member 41 is hooked on the extension pipe support portion 11, first, the upstream pipe body 32 and the engaging member 41 are aligned. This alignment is performed by rotating the engaging member 41 as necessary, so that the anti-rotation portion 52b of the lock member 52 is correctly opposed to the anti-rotation surface 34a of the upstream tube body 32. In this state, as shown in FIG. 11 due to the spring force of the spring 55, the locking member 52 is arranged such that the detent portion 52 b side is lower than the height position of the pivot 54.

  In this state, the engagement member 41 is moved together with the dust-absorbing air passage body 21 (see FIGS. 1 and 2) as indicated by an arrow in FIG. 11, and the hook portion 43 is moved to the hook portion of the extension pipe support portion 11. Hook the receiver 12 from above. Along with this behavior, the arm portion 52 a of the lock member 52 hits the hook portion receiver 12, and the arm portion 52 a is pushed upward by the hook portion receiver 12, so that the lock member 52 rotates upward against the spring 55. Moved. By this rotation, the rotation preventing portion 52 b of the lock member 52 comes into contact with the rotation preventing surface 34 a of the upstream side tubular body 32.

  For this reason, as shown in FIGS. 12 and 13, when the engagement member 41 is properly hooked to the extension tube support portion 11, the lock member 52 contacting the detent surface 34a is used as a stopper with respect to the engagement member 41. Therefore, the upstream tube 32 is restrained so that the upstream tube 32 does not rotate in the circumferential direction inadvertently. Therefore, in a state where the dust-absorbing air passage body is supported by the cleaner body, the rotation of the dust-absorbing air path body with respect to the cleaner body is suppressed, and for example, it can be maintained in an appropriate state as shown in FIG.

  As a preparation for cleaning from this state, when the engagement member 41 is pulled upward from the extension tube support part 11, the action of the hook part receiver 12 pushing up the arm part 52a disappears accordingly. The lock member 52 is rotated by the force of the spring 55 in the direction opposite to the rotation direction of the lock member 52 by the hook portion receiver 12. Therefore, as shown in FIG. 11, the rotation preventing portion 52b of the lock member 52 is separated from the rotation preventing surface 34a of the upstream side tubular body 32 and the restriction is released, so that the engaging member 41 is connected to the upstream side tubular body 32. It will be in the state which can be rotated in the circumferential direction.

  Except for the matters described above, the second embodiment is the same as the first embodiment. Therefore, even the fourth embodiment can solve the problem of the present invention.

  In each of the above embodiments, the hooking portion 43 of the engaging member 41 is formed in a hook shape. However, instead of this, an engaging hole may be provided at the tip of the hooking portion. The hook receiving portion of the support portion 11 can be implemented by forming it with a convex portion to which the engaging hole is engaged and disengaged.

  DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner, 2 ... Vacuum cleaner main body, 2a ... Bottom wall of vacuum cleaner main body, 3 ... Suction port, 4 ... Electric blower, 6 ... Wheel, 11 ... Extension pipe support part, 12 ... Hook part receiving part, 13 Denoted part, 14 ... Groove part, 22 ... Dust suction hose, 25 ... Suction port body, 31 ... Extension pipe, 32 ... Upstream side pipe body, 34 ... Member mounting part, 34a ... Anti-rotation surface, 35 ... Positioning part, 36 ... Holding Means 40: Torsion coil spring (biasing body) 41 ... Engagement member 42 ... Fitting part 43 ... Hook part 45 ... Protective cover 51 ... Locking means 52 ... Lock member 52b ... Anti-rotation 54, pivot, 55 ... spring (biasing member)

Claims (8)

A tubular body having a member mounting portion forming a circular outer peripheral surface and positioning portions provided on both sides of the mounting portion;
With respect to the fitting body, which is fitted to the outer periphery of the member mounting portion so as to be movable in the circumferential direction of the tubular body and is stopped in the axial direction of the tubular body by the positioning portion, and the tubular body An engagement member having a hook portion protruding from the fitting portion in a direction away from the engagement portion;
An extension pipe for a vacuum cleaner characterized by comprising:   The extension pipe for a vacuum cleaner according to claim 1, wherein at least a tip side portion of the hook portion is formed in a tapered shape toward the tip of the hook portion.   3. A holding means having a biasing body that biases the engaging member in a movable direction so that the hooking portion protrudes at a predetermined position around the tubular body. An extension tube for a vacuum cleaner as described in 1.   4. The engagement member according to claim 1, wherein the engaging member has a protective cover made of a cushioning material softer than the hook portion and attached to an outer surface of the hook portion. The extension pipe for a vacuum cleaner according to one item. An electric blower is built in, has a suction port at the front, and can be placed upright with the rear as the bottom. A vacuum cleaner body provided with a support part;
A dust suction hose connected to the suction port;
The extension pipe according to any one of claims 1 to 4, wherein the extension pipe is connected to a tip end portion of the dust suction hose, and the extension body is placed in a state where the vacuum cleaner main body is set up with a rear portion thereof as a bottom portion. An extension pipe that is hooked to the extension pipe support part so as to be detachable from above and supported by the cleaner body;
A suction port connected to the tip of the extension tube;
The vacuum cleaner characterized by comprising.   The extension tube support portion is formed on a back side of the hook portion receiver, and a hook portion receiver on which the engagement member is hooked in a state where the vacuum cleaner main body is placed with the rear portion thereof as a bottom portion. The concave portion into which the hook portion is inserted from above and a groove portion that is continuous above the concave portion, and the width of the groove portion is gradually narrowed toward the back of the groove portion. 5. A vacuum cleaner according to 5.   The engagement member is restrained from rotating with respect to the engagement member in a state where the engagement member is hooked on the extension tube support portion, and the engagement member is removed from the extension tube support portion. The vacuum cleaner according to claim 5, further comprising a lock unit that releases the constraint.   The locking means has a detent surface formed on the outer periphery of the tubular body and a detent portion contacting and separating from the detent surface, and is rotatably attached to the engagement member. A locking member that is rotated in a direction in which the anti-rotation portion comes into contact with the anti-rotation surface when it is hooked on the extension tube support portion, and the hook portion receiving portion of the lock member The vacuum cleaner according to claim 7, further comprising an urging member that urges the lock member in a direction opposite to a rotation direction due to.

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