JP4958570B2 - Vacuum cleaner suction tool and vacuum cleaner equipped with the suction tool - Google Patents

Description

  The present invention relates to a vacuum cleaner suction tool used in general households and the like, and a vacuum cleaner provided with the suction tool.

FIG. 14 is a cross-sectional view showing a part of a conventional electric vacuum cleaner, with an extension pipe 101 connected to a hose unit (not shown) having one end connected to the vacuum cleaner body and the other end provided with a grip. The suction tool 102 is connected.
The suction tool 102 is connected to the suction pipe main body 103, the coupling joint 104 coupled to the suction tool main body 103 so as to be pivotable in the vertical direction, and pivotally coupled to the coupling joint 104 in the horizontal direction, and connected to the extension pipe 101. The connecting pipe 105 is made up of. And the rotary brush 106 is provided in the front side in the suction tool main body 103, and the left-right paired wheel 107,108 is provided in the front part side and the rear part side. Reference numeral 109 denotes a storage hook holder provided on the extension pipe 101.

  In such a vacuum cleaner, the power is turned on by holding the grip portion of the hose unit, the suction tool 102 is moved on the floor surface, etc., and the dust on the floor surface and the like by the suction force of the electric blower provided in the vacuum cleaner body. Is collected through the extension pipe 101 and the hose unit into the dust collection chamber in the cleaner body. At this time, the rotary brush 106 is rotated by the motor or the suction wind force, and the dust such as the floor surface is scraped up.

  In addition, in a conventional vacuum cleaner, a plurality of storage batteries as a power source for the drive motor of the rotary cleaning body are arranged in a space provided in the suction body, and the lower surface opening of the space is closed with a power cover. Yes (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2002-34865 (page 7-9, FIG. 6-8)

  When the vacuum cleaner holds the grip portion of the hose unit and moves the suction tool 102 along the floor surface or the like, the force pushing the floor surface or the like is applied to the support shaft of the coupling joint 104 via the extension pipe 101 and the connection pipe 105. Since the force is transmitted, the support shaft of the coupling joint 104 is a base point for changing the force in the direction of pushing the floor surface or the like to the force in the front-rear direction. Since the conventional suction tool 102 shown in FIG. 14 has a recess 110 in a region immediately below the support shaft of the coupling joint 104, a large resistance is generated when the suction tool 102 moves.

  Further, in the conventional suction tool 102 shown in FIG. 14, for example, when cleaning a carpet, the carpet bristle foot 111 enters the recess 110 formed on the lower surface of the coupling joint 104, and this is the length of the bristle foot. It becomes a big resistance by the direction of the sheath hair. For these reasons, coupled with the suction effect of the suction tool 102, there is a problem that a large burden is applied to the arm, elbow, waist, and the like due to the movement of the suction tool 102.

  Further, the suction body of Patent Document 1 is provided with a power cover at the lower surface opening of the space portion substantially in parallel with the floor surface, but there is no recess. Is formed as a separate part, so that it is always in sliding contact with the rotary cleaning body during the cleaning operation before and after the suction body, and the vertical rotation of the rotary cleaning body becomes heavy due to friction between the two. There's a problem.

  Further, when the carpet is cleaned, there is a problem that friction is generated between the carpet and the power supply lid, so that static electricity is charged, and dust adheres to the battery lid, thereby hindering cleaning. In order to prevent this, it is necessary to form the battery cover with a special material or take measures for static elimination, but the former is costly, and the latter is a closed space, so it is difficult to prevent electrostatic charge. Met.

  The present invention has been made in order to solve the above-described problems. When cleaning a carpet as well as a floor surface, the present invention can move smoothly with little resistance, and static electricity is charged and dust adheres thereto. It is an object of the present invention to provide a vacuum cleaner suction tool and a vacuum cleaner equipped with the suction tool.

In the vacuum cleaner suction tool according to the present invention, a rotary brush is rotatably disposed between a lower case having a suction port on the lower surface and an upper case, and a connecting portion projects from the rear side. A suction fitting body provided with a rear wheel at the lower end of the rear end , a coupling joint having a substantially semi-cylindrical body portion pivotably connected to the coupling portion of the suction tool body, and the connection A connecting joint receiving part having a connecting pipe connected to the joint so as to be rotatable in the left-right direction, and inclining upward in the entire width direction of the connecting part of the suction tool body so as to wrap around the lower surface of the body part of the connecting joint And a connecting portion bottom plate disposed substantially on the same plane as the lower surface of the lower case via a space portion below the connecting joint receiving portion, and a lower portion of the connecting portion are connected to the lower case. a double structure by a connecting portion bottom plate and the joint receiving part, the connecting joint The rear side of the space portion formed between the only portion and the connecting portion bottom plate is provided with a opening.

  Moreover, the vacuum cleaner which concerns on this invention is equipped with said suction tool.

According to the vacuum cleaner suction tool of the present invention, since the bottom plate of the connecting portion is provided on the same plane as the lower surface of the lower case at the bottom of the connecting joint receiving portion, the floor surface is of course resistant to cleaning the carpet. And can move smoothly, and static electricity is charged and dust does not adhere.
In addition, since the suction tool is provided, it is possible to obtain a vacuum cleaner that is easy to use and easy to use.

FIG. 5 is a perspective view showing the overall configuration of the electric vacuum cleaner according to the present invention.
In the figure, reference numeral 1 denotes a vacuum cleaner main body, which is provided with a dust collection chamber on the front side inside, and an electric blower, a control board, a cord reel, etc. (all not shown) are arranged on the rear side. Reference numeral 2 denotes a hose unit. A hose 3 is provided with a connector 4 that is detachably connected to the cleaner body 1 at one end, and a grip portion 5 having an operation unit 6 at the other end. 7 is an extension pipe which is provided with a storage hook holder 8 at the lower portion and is detachably connected to the grip portion 5 of the hose unit 2, 9 is a power cord wound around a cord reel, and 10 is detachably attached to the extension pipe 7. The suction tool to be connected.

[Embodiment 1]
1 is a central sectional view of a suction tool according to Embodiment 1 of the present invention, FIG. 2 is a top perspective view of FIG. 1, FIG. 3 is a bottom perspective view of FIG. 1, and FIG. 4 is an exploded perspective view of FIG. .
Suction device 10 comprises the lower case 12 and upper case 40, and the suction device the body 1 1 the rotary brush 70 is rotatably disposed between them, the vertical direction between the lower case 12 and upper case 40 The connecting joint 50 is connected to the connecting joint 50 so as to be rotatable in the left-right direction, and is connected to the extension pipe in a detachable manner.

The lower case 12 is formed in a substantially box shape by a rectangular bottom plate, a front wall, a rear wall, and both side walls (in the following description, the left side in FIG. 1 is the front and the right side is the rear). A suction port 13 is opened in the longitudinal direction, and a plurality of front opening portions 14 communicating with the suction port 13 are provided on the front wall. Further, a connecting portion 15 of the connecting joint 50 projects from the central portion in the longitudinal direction on the rear surface side.
Reference numeral 16 denotes a front wheel that is rotatably mounted on both sides of the front side of the suction port 13 by a shaft 17, and 18 is a rear wheel that is rotatably mounted to a lower portion of the rear end portion of the connecting portion 15 by a shaft 19. .

Further, a spatula mounting groove 20 having substantially the same length as that of the suction port 13 is provided between the suction port 13 and the connecting portion 15 of the bottom plate of the lower case 12. A coupling joint receiving portion 21 extending obliquely upward from the upper end portion toward the rear surface side and having a shape corresponding to the main body 51 of the coupling joint 50 is provided, and a substantially semicircular bearing portion is provided on the upper surface of both sides. 22 is provided. In addition, this coupling joint receiving part 21 is a height position of about 70 to 10 mm from the floor surface. Reference numeral 23 denotes a bypass air passage that opens in the left-right direction in the vicinity of the spatula mounting groove 20 of the coupling joint receiving portion 21.

  Further, a connecting portion bottom plate 24 extending rearward from the lower end portion of the spatula mounting groove 20 is provided at the lower end portion of the connecting portion 15, and the connecting portion bottom plate 24 is substantially the same as the bottom plate of the lower case 12. The horizontal surface portion 24a is formed in a plane and the inclined surface portion 24b is inclined obliquely upward on the rear side, and the rear end portion of the inclined surface portion 24b is separated from the rear wheel 18 by a slight gap. It is located above the axis 19 of.

  In this way, the connecting portion 15 has a double structure by the connecting joint receiving portion 21 and the connecting portion bottom plate 24, the space portion 25 is formed between the two, and the opening 26 on the rear side is finger-tip. It is large enough to enter. In addition, 27 is a reinforcing rib provided between the coupling joint receiving portion 21 and the coupling portion bottom plate 24, 28 is a screw insertion hole provided on both sides of the coupling portion, and 28a is a screw provided on the front side of the suction port 13. It is an insertion hole.

  The upper case 40 is formed to be low in an arc shape corresponding to the outer shape of the rotary brush 70 so that the upper surface can be inserted under the bed or the like, and a main body portion 41 that covers the suction port 13 of the lower case 12; A pair of mounting arms 42 that protrude at a predetermined interval on the rear side of 41 and cover the upper surfaces of both sides of the connecting portion 15 of the lower case 12, and a bearing portion 22 provided on the connecting portion 15 of the lower case 12, A bearing of the coupling joint 50 is formed by a substantially semicircular bearing portion 43 provided on the lower surface of the mounting arm 42 of the upper case 40.

When the main body 41 of the upper case 40 is formed of a transparent or translucent coloring material, a part of the upper case 40 is formed in a color closer to the transparent than the other part, or a thick part is formed in a part. It may be provided to have a lens effect.
With this configuration, the state of the rotary brush 70 can be visually observed from above during cleaning, so that the maintenance time and the like can be easily determined.

The coupling joint 50 includes a main body 51 that is pivotably coupled in the vertical direction between the coupling portion 15 of the lower case 12 and the mounting arm 42 of the upper case 40, and a connection portion 52 to which the connection pipe 60 is connected. Both are provided with an air passage 53 communicating with the suction port 13 of the lower case 12. Further, on both side walls of the main body 51, support shafts 54 that are rotatably supported by bearings 22 and 43 formed by the lower case 12 and the upper case 40 are provided. The coupling joint 50 is constantly biased upward by a spring 55 interposed between the case 12 and the coupling portion 15. Further, the connection portion 52 is provided with a pair of stoppers 56 to regulate the rotation range (for example, 180 °) of the connection pipe 60 that is rotatably fitted to the stoppers 56. In the connection pipe 60, 61 is a fitting portion having a locking hole 62 of the stopper 56, and 63 is a connection portion to the extension pipe 7, and has an air passage 64 communicating with the air passage 53 of the coupling joint 50. .

  70 is a rotary brush rotatably disposed between the suction port 13 of the lower case 12 of the suction tool 10 and the main body portion 41 of the upper case 40, and has two spiral grooves 72 on the outer periphery. The rotary shaft 74 is inserted into the through hole 73 provided in the axial direction of the holder 71, the bristle brush 75 is inserted into the groove 72 and fixed, and the fixed shaft 76 is inserted into the through hole 73 and the rotary shaft 74 from both sides. They are fixed together. Then, a bearing portion 77 having a quadrangular columnar projection 78 on the outer surface is rotatably fitted to the rotary shaft 74 and the fixed shaft 76.

In the rotary brush 70, the protrusions 78 of the bearing portion 77 are fitted into support portions 29 provided on the side walls on both sides of the suction port 13 of the lower case 12, and the rotary brush 70 is rotatably supported.
A spatula holder 80 is inserted and fixed in the spatula mounting groove 20 of the lower case 12, and a spatula 86 made of a flocking brush is detachably attached thereto.

  Next, an example of an assembling procedure of the suction tool 10 composed of each part as described above will be described. It is assumed that the front case 16, the rear wheel 18, and the spatula 86 are attached to the lower case 12, the rotary brush 70 is assembled, and the connection pipe 60 is connected to the connection joint 50.

First, the rotary brush 70 is accommodated in the lower case 12, and the protrusions 78 provided at both ends thereof are fitted into the support portions 29 provided on both side walls of the lower case 12. Then, the support shaft 54 of the connecting joint 50 fitted to the bearing portion 22 of the lower case 12, interposed a spring 55 between the connecting portion 15 of the main body portion 51 and the lower case 12. The main body portion 41 of the upper case 40 is fitted to the lower case 12, and the bearing portion 43 provided on the mounting arm 42 is fitted to the support shaft 54 of the coupling joint 50 to form a bearing, which is provided on the lower case 12. Screws inserted from below into the screw insertion holes 28, 28a are screwed into the upper case 40, and both are fixed together.
As a result, the coupling joint 50 is supported by the suction tool main body 11 so as to be rotatable in the vertical direction, and the rotary brush 70 is rotatably supported within the suction tool main body 11.

At this time, since a gap of about 0.1 to 1 mm is formed between the coupling joint receiving portion 21 of the lower case 12 and the main body portion 51 of the coupling joint 50, the degree of vacuum of the air passage 53 is almost affected. The connecting joint 50 can be smoothly rotated in the vertical direction without giving.
Moreover, since the spring 55 is interposed between the suction tool main body 11 and the coupling joint 50, and the coupling joint 50 is always urged to rotate upward, for example, the cleaner body 1 is erected and the When the storage hook holder 8 (see FIG. 5) provided on the extension pipe 7 is locked and stored on the bottom surface, the suction tool 10 does not protrude from the floor surface, and the bottom surface is the floor surface. Since it is placed on top, it can be stored in a preferable state.
Further, an opening 26 provided in the connecting portion 15 of the suction port body 11 opens between the rear wheel 18 and the connecting joint 50.

Next, the operation of the vacuum cleaner provided with the suction tool 10 configured as described above will be described.
In the vacuum cleaner shown in FIG. 5, the cord 9 is inserted into a power outlet, the power switch of the operation unit 6 provided in the grip unit 5 is turned on, the electric blower is energized and driven. Then, the floor suction tool 10 is moved along the floor surface or the like, the outside air is sucked from the suction port 13 and the front opening 14, and dust or the like provided on the floor surface is sucked together with the outside air. Rotate the rotary brush 70 to scrape up dust and the like, and collect it in the dust collecting chamber of the cleaner body 1 through the extension pipe 7 and the hose unit 2.
The air in which dust or the like is collected in the dust collection chamber is cleaned by a filter, and after cooling the electric blower, the control board, etc., it is discharged from an exhaust port provided on the rear wall of the cleaner body 1.

According to the present invention, the connecting portion bottom plate 24 having the horizontal surface portion 24a is provided on the substantially same plane as the bottom surface of the lower case 12 at a position slightly higher than the floor surface of the lower surface of the connecting portion 15 of the lower case 12 of the suction tool 10. Therefore, the resistance at the time of moving the suction tool 10 is small, and it can be smoothly moved on the floor without requiring a large force. Moreover, since the lower part of the connection part 15 of the lower case 12 is made into the double structure by the connection coupling receiving part 21 and the connection part bottom plate 24, the rigidity of the connection part 15 can be improved.

  Moreover, since the lower part of the connection part 15 was made into the double structure as mentioned above, even if a carpet with a long bristle is cleaned, dust etc. do not penetrate | invade under the connection joint receiving part 21. FIG. If dust or the like enters the space 25 from the opening 26 provided on the rear side of the connection joint receiving portion 21 and the connection portion bottom plate 24, the connection joint is connected from the bypass air passage 23 provided in the connection joint receiving portion 21. Since the air is sucked into the 50 air passages 53, dust or the like does not collect in the space portion 25. Note that when dust or the like adheres to the space 25, a finger or a stick may be inserted through the opening 26 and removed. At this time, since the rear end portion of the connecting portion bottom plate 24 is located above the axis of the rear wheel 18, it is easy to put a finger into the opening 26.

Further, since the space portion 25 is provided with the opening portion 26 on the rear surface side, it is possible to prevent static electricity from being charged with dust or the like in the space portion 25.
Further, when dust or the like adheres to the rotary brush 70 or the spatula 86 or the yarn waste gets entangled, as shown in FIG. 6, the suction tool 10 is turned over, and the rear wheel 18 and the connecting portion bottom plate 24 are turned over. Since it is only necessary to remove the dust and the like in this state by holding the finger between the inclined surface portion 24b and holding the finger, cleaning is easy.

[Embodiment 2]
7-9 is sectional drawing of the suction tool which concerns on Embodiment 2 of this invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
The present embodiment relates to a bypass air passage 23 provided in the coupling joint receiving portion 21 of the lower case 12 of the suction tool 10.

  The suction tool 10 of FIG. 7 is provided with a bypass air passage 23 of the lower case 12 in the vicinity of the rear end of the coupling joint receiving part 21, and the normal operating range of the suction tool 10 (for example, the floor surface and the connection pipe 60 is In the case of an angle of about 45 °, the bypass air passage 23 is closed by the main body 51 of the coupling joint 50, and the bypass air passage 23 is opened when the coupling joint 50 is rotated to the maximum. It is a thing.

  With this configuration, the bypass air passage 23 is closed in the normal operating range of the suction tool 10, so that the degree of vacuum of the air passage 53 of the coupling joint 50 is maintained and the suction force is not affected. If the connecting joint 50 can be rotated upward as much as necessary, the bypass air passage 23 is opened, and dust or the like in the space 25 is sucked into the air passage 53 of the connecting joint 50. Can be discharged.

The suction tool 10 of FIG. 8 has a bypass air passage 23 in the vicinity of the spatula mounting groove 20 of the coupling joint receiving portion 21, and has a protrusion 31 on the inner peripheral surface of the coupling joint receiving portion 21 on the rear side of the upper surface. A shutter 30 is provided, and the shutter 30 is urged toward the bypass air passage 23 by a spring 32 interposed between the coupling joint receiving portion 21 and the shutter 30 to close the bypass air passage 23. .
With this configuration, the bypass air passage 23 is normally closed by the shutter 30, and when the coupling joint 50 is rotated upward as much as possible, the projecting edge 56 provided on the outer periphery of the distal end thereof is projected from the shutter 30. The shutter 30 is slid against the part 31 to open the bypass air passage 23.
Also in this suction tool 10, the effect similar to the suction tool 10 of FIG. 7 can be acquired.

The suction tool 10 of FIG. 9 is provided with a bypass air passage 23 in the connection joint receiving portion 21 in the vicinity of the spatula mounting groove 20, and an operation portion (not shown) provided outside on the lower surface of the connection joint receiving portion 21. A shutter 33 that slides forward and backward by operating is provided, and the bypass air passage 23 is opened and closed by sliding the shutter 33 forward and backward as necessary. A spring is provided between the lower case 12 and the shutter 33 to urge the shutter 33 in the direction in which the bypass air passage 23 is closed. After the shutter 33 is slid to open the bypass air passage 23, the operation portion is used. When the finger is released, the shutter 33 may automatically slide to close the bypass air passage 23.

  When the carpet having a long bristle (for example, 10 mm or more) is cleaned by the suction tool 10, the suction port 13 is closed by the carpet's bristle and is in a sealed state, causing the suction tool 10 to move. It can be difficult. In such a case, according to the suction tool 10 of FIG. 9, the shutter 33 is slid by the operation unit to open the bypass air passage 23, thereby suppressing the suction of the suction tool 10 and easily cleaning. be able to.

[Embodiment 3]
FIG. 10 is a side view of the suction tool according to Embodiment 3 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
The suction tool 10 according to the first embodiment is provided with a suction port 13 on the lower surface of the lower case 12 of the suction tool body 11 and a plurality of front openings 14 on the front wall, and dust is generated from the suction openings 13 and the front opening 14. Etc. are to be sucked.

In such a suction tool 10, if the front side hits a wall surface or the like during cleaning, the front opening 14 is closed and dust is sucked only from the suction port 13, so that the suction force is reduced and the rotary brush 70 is reduced. Rotation is also reduced.
In the present embodiment, side opening portions 35 communicating with the suction port 13 are provided on both side walls of the lower case 12. With this configuration, even if the front side of the suction tool 10 hits a wall surface or the like, dust or the like is sucked from the suction port 13 and the side opening 35 and the rotary brush 70 is rotated. It is possible to suppress a decrease in rotation of 70 and to perform cleaning without any trouble.

[Embodiment 4]
The present embodiment relates to a rotary brush and a spatula of the suction tool 10.
In the first embodiment, the case where the rotary brush 70 with the bristle brush 75 attached to the holder 71 is used is shown. However, in the present embodiment, instead of this, as shown in FIG. A rubber rotary 79 is used.
In this case, since the rotary shaft 74, the fixed shaft 76, and the bearing portion 77 can be shared, the bristle brush 75 and the rubber rotary 79 can be appropriately replaced as necessary.

In the first embodiment, the case where the spatula 86 made of a flocked brush is used is shown. However, in the present embodiment, instead of this, as shown in FIGS. A T-shaped rubber spatula 87 composed of a portion 88a and a leg portion 88b is used.
In this case, when the suction tool 10 is moved forward and cleaned, the lower portion of the leg portion 88b of the rubber spatula 87 is bent rearward and is sandwiched between the floor surface or the like and the lower case 12, and the operation becomes heavy. Sometimes. This tendency is particularly noticeable when cleaning carpets.

In the present embodiment, a space (concave portion) 36 for storing the bent portion is provided in a portion where the bent portion of the rubber spatula 87 on the bottom portion of the lower case 12 hits, and the bent portion is stored in the space 36. The bottom surface of the bent rubber spatula 87 is configured to be substantially flush with the bottom surface of the lower case 12.
Thereby, since the suction tool 10 can be advanced without resistance, operativity can be improved.
FIG. 12C shows another example of the rubber spatula 87, in which a projection 89 having a claw-like cross section is provided in the longitudinal direction of the lower portion on the front side of the leg 88b. By configuring the rubber spatula 87 in this way, when cleaning the carpet, it is possible to have a function of hitting the carpet on the protrusion 89 and a function of hooking lint on the carpet.

FIG. 13 is a front view showing an example of a spatula holder 80 that is attached to the spatula attachment groove 20 provided in the lower case 12 of the suction tool body 11 and on which the spatulas 86 and 87 are attached.
FIGS. 13A and 13B are front views of a spatula holder 81 made of an elastic material such as rubber, to which a rubber spatula 87 is attached. A fitting groove 82 into which the head portion 88a of the spatula 87 is fitted is provided, and the lower portion is opened in a C-shape 83 in order to provide a degree of freedom in which the leg portion 88b can be bent back and forth.

  Such a spatula holder 81 is fitted in and attached to the spatula mounting groove 20 of the lower case 12, but in order to fix it more firmly, for example, a protrusion that protrudes inward in the longitudinal direction of the inner wall of the spatula mounting groove 20. (Not shown) may be provided. Then, when the spatula holder 81 is fitted into the spatula mounting groove 20, the side wall of the spatula holder 81 is elastically deformed and locked as shown by the broken line 84 by the protrusions, and the upper part is directed upward accordingly. Since it protrudes, the spatula holder 81 is firmly fixed to the inner wall and the top wall of the holder mounting groove 20 (exaggerated in the drawing). At this time, the inner wall of the fitting groove 82 is also elastically deformed and protrudes inward, so that the head 88a of the rubber spatula 87 can be reliably held.

  FIG. 13B shows a spatula holder 81 having the same structure, but in this case, a protrusion protruding inward is provided in the longitudinal direction of the top wall of the spatula mounting groove 20. When the spatula holder 81 is fitted into the spatula mounting groove 20, the top surface thereof is elastically deformed and elastically deformed and locked as indicated by the broken line 84, and accordingly, the top surface of the fitting groove 82 projects downward. Therefore, the spatula holder 81 is firmly fixed, and the head 88a of the rubber spatula 87 is securely held.

FIG. 13 (c) is a front view of a spatula holder 80 of a flocking brush 86 made of an elastic material such as rubber. 85 is provided, and the flocking plate 86a of the flocking spatula 86 is inserted into the fitting groove 85 and attached.
According to the present embodiment, the flocking spatula 86 and the rubber spatula 87 can be appropriately replaced by replacing the spatula holders 80 and 81.

In the above description, the case where the present invention is applied to the illustrated suction tool is shown, but the present invention can also be applied to a suction tool having another structure such as a suction tool that rotates a rotary brush with a motor.
Moreover, although the case where the suction tool which concerns on this invention was provided in the vacuum cleaner shown in FIG. 5 was shown, the suction tool which concerns on this invention can be used also for the vacuum cleaner of another structure.

It is a center sectional view of the suction tool concerning Embodiment 1 of the present invention. FIG. 2 is a top perspective view of FIG. 1. FIG. 2 is a bottom perspective view of FIG. 1. FIG. 2 is an exploded perspective view of FIG. 1. It is explanatory drawing of the vacuum cleaner provided with the suction tool which concerns on this invention. It is explanatory drawing of the effect of the suction tool of FIG. It is a center sectional view of the suction tool concerning Embodiment 2 of the present invention. It is center sectional drawing of the other example of the suction tool which concerns on Embodiment 2 of this invention. It is center sectional drawing of the other example of the suction tool which concerns on Embodiment 2 of this invention. It is a side view of the suction tool which concerns on Embodiment 3 of this invention. It is a disassembled perspective view of the rotary brush of the suction tool which concerns on Embodiment 4 of this invention. It is the center sectional view of the suction tool which concerns on Embodiment 4 of this invention, and the perspective view of a rubber-like spatula. It is a front view of the spatula holder which concerns on Embodiment 4 of this invention. It is sectional drawing which shows a part of conventional vacuum cleaner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body, 2 Hose unit, 7 Extension pipe, 10 Suction tool, 11 Suction tool main body, 12 Lower case, 13 Suction port, 15 Connection part, 16 Front wheel, 18 Rear wheel, 20 Spatula mounting groove, 21 Connection joint Receiving portion, 23 Bypass air passage, 24 Connecting portion bottom plate, 24a Horizontal surface portion, 24b Inclined surface portion, 25 Space portion, 26 Opening portion, 30, 33 Shutter, 40 Upper case , 50 Connecting joint, 54 Support shaft, 55 Spring, 60 Connection tube, 70 Rotary brush.

Claims (7)

A rotary brush is rotatably disposed between a lower case and an upper case having a suction port on the lower surface, a connecting portion projects from the rear side, and a rear wheel is provided below the rear end of the connecting portion. A suction fitting main body, a coupling joint having a substantially semi-cylindrical main body connected to the coupling portion of the suction tool main body in a vertical direction, and a coupling joint rotatably connected to the coupling joint in the left-right direction. A connecting pipe,
A coupling joint receiving portion that is inclined upward in the entire width direction of the coupling portion of the suction tool main body and envelops the lower surface of the main body portion of the coupling joint, and a lower portion of the lower case through the space portion below the coupling joint receiving portion. A connecting portion bottom plate disposed on the same plane as the lower surface is provided integrally with the lower case, and the lower portion of the connecting portion is formed into a double structure by the connecting joint receiving portion and the connecting portion bottom plate, and the connecting joint receiving portion A suction tool for a vacuum cleaner , wherein an opening is provided on the rear side of the space formed between the base plate and the connecting portion bottom plate . The connecting portion bottom plate is formed with a horizontal horizontal surface portion on the front surface side and an inclined surface portion inclined upward on the rear surface side, and the rear end portion of the inclined surface portion is positioned above the axis of the rear wheel. suction tool of the vacuum cleaner according to claim 1, characterized in that. Suction tool of the vacuum cleaner according to claim 1 or 2, characterized in that a bypass air passage to the connecting joint receiving part. The suction tool for a vacuum cleaner according to claim 3, wherein the bypass air passage is provided at a position where the bypass air passage is opened when the coupling joint is rotated upward as much as possible. The suction tool for a vacuum cleaner according to claim 3, wherein a shutter that opens and closes the bypass air passage in conjunction with the rotation of the coupling joint is provided in the bypass air passage. The vacuum cleaner suction tool according to claim 3, wherein a shutter that opens and closes the bypass air passage by an external operation is provided in the bypass air passage. The vacuum cleaner provided with the suction tool in any one of Claims 1-6 .

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