JP2014138693A - Floor nozzle for vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor nozzle for a vacuum cleaner capable of facilitating the rotation of a rotary brush even when the floor surface of a thick carpet, etc. is cleaned.SOLUTION: A floor nozzle for a vacuum cleaner comprises: a floor nozzle body 4 having a cleaning area and a traveling area; drive rollers 11, 11A rotatably supported by the floor nozzle body 4; and a transmission mechanism for rotating a rotary brush 6 forward/backward with the rotation of the drive rollers 11, 11A. The cleaning area is the area where a suction port is arranged on the lower surface and the rotary brush 6 faces the suction port and rotatably supported by the floor nozzle body. The traveling area is the area where the drive rollers 11, 11A are rotatably supported by the floor nozzle body 4. A height b21 between a bottom surface B22 of the floor nozzle body 4 in the traveling area and a cleaned surface C19 is set to be larger than a height a20 between a bottom surface A18 of the floor nozzle body 4 in the cleaning area and the cleaned surface C19.

Description

  The present invention relates to a floor nozzle for an electric vacuum cleaner having a driving roller for rotating a rotating brush for dust lifting.

  Conventionally, this type of vacuum cleaner floor nozzle has used a rotating brush to efficiently scrape dust on the floor surface from the floor surface. In general, an electric motor or a fan that is rotated by the suction airflow of the cleaner body is used as the rotational driving force of the rotating brush. However, when the electric motor is used, the floor nozzle becomes heavy, there are some difficulties from the viewpoint of energy saving, and when the fan is used, the fan rotates at a high speed and becomes a noise generation source. In order to solve these problems, a vacuum cleaner having a transmission mechanism that uses a wheel rotatably supported by the floor nozzle body as a driving roller and rotates the rotating brush forward and backward in conjunction with the rotation of the driving roller. A floor nozzle is known (Patent Document 1, Patent Document 2).

  In addition, in order to reduce the deformation of the hair of the carpet while ensuring the suction performance on the floor surface and its running performance, the lower case of the floor nozzle, the rear lower case with the rear wheel, and the front wheel There is known a floor nozzle for an electric vacuum cleaner that is composed of a front lower case provided with a rotating brush and has a bottom surface of the rear lower case positioned above the bottom surface of the front lower case. (Patent Document 3).

Japanese Patent Laid-Open No. 11-9521 Japanese Utility Model Publication No. 01-99349 JP-A-11-299712

  The floor nozzle for a vacuum cleaner disclosed in the above-mentioned Patent Document 1 has effects of light weight, energy saving and low noise because the rotation of the rotating brush is interlocked with the rotation of the driving roller (wheel). However, since the driving roller is provided on the side surface of the floor nozzle main body, it is easy to come into contact with the wall or the like when cleaning the wall or the like, and rotation is insufficient or deformation due to collision is likely to occur. In addition, when cleaning a sill or the like, the driving wheel is on the side surface, so that it is easy to protrude from the sill and rotation failure tends to occur. Furthermore, the operating force during cleaning is transmitted to the driving roller through a connecting pipe (connecting pipe) connected to the main body of the cleaner, but in the vicinity of the connecting pipe (connecting pipe), the floor nozzle body is bent. The maximum distance, that is, the distance to the surface to be cleaned is shortened. As a result, the frictional resistance increases with the surface to be cleaned such as a carpet having a long bristle foot, which tends to reduce the rotational force of the driving roller. All have the subject that it leads to the fall of the rotational force of a rotating brush, ie, the fall of cleaning efficiency.

  Further, since the rotation shaft of the driving roller (wheel) is supported by the main body case on one axis, the rotation shaft tends to be eccentrically rotated as compared with both shaft support, and the one shaft needs to be supported firmly. The structure is likely to be complicated and the transmission mechanism is arranged closer to the center side than the driving roller (wheel), so that the driving force is first transmitted to the center side, and then the gear mechanism and the like. In this case, it has to be transmitted back to the rotating belt (power transmission belt) near the driving roller (wheel) provided on the side surface of the floor nozzle body, and the structure is complicated. Yes.

  Furthermore, in the bottom surface of the floor nozzle for the vacuum cleaner, the bottom surface in the vicinity where the rotating brush is installed and the bottom surface in the vicinity where the driving roller (wheel) is installed are substantially on the same plane. On floors with long bristle feet such as carpets, the hair tips come into contact with the bottom surface, and the frictional resistance between the driving rollers (wheels) and the floor surface is weakened. Even if the floor nozzle is moved back and forth, the driving roller (Wheel) is difficult to rotate, and there is a problem that the rotating brush that is interlocked with the rotation of the driving roller (wheel) is also difficult to rotate.

  Further, the floor nozzle for a vacuum cleaner disclosed in Patent Document 2 links the rotation of the rotating brush with the rotation of the driving roller (rolling roller), so that the rotating brush (rotor) is smooth and reliable. The roller for driving (rolling roller) is under the connecting pipe (joint), that is, the floor nozzle for the vacuum cleaner. Since it is provided on the bottom side, the driving roller has a small diameter, and on the floor surface with long hairs such as carpets, the driving roller (rolling roller) sinks into the hairs and entangles the hairs. It is easy to cause rotation failure, and the bottom surface in the vicinity where the rotating brush (rotor) is installed and the bottom surface in the vicinity where the driving roller (rolling roller) is installed are almost on the same plane. , Carpet etc. On the floor surface with long legs, the hair tip also comes into strong contact with the bottom surface, and the force that lifts the bottom surface works, and the frictional resistance between the driving roller (rolling roller) and the floor surface becomes weak, Even if the floor nozzle is moved in the front-rear direction, the driving roller (rolling roller) is difficult to rotate, and the rotating brush linked to the rotation of the driving roller (rolling roller) is also difficult to rotate. .

  The floor nozzle for vacuum cleaner (floor suction tool) disclosed in Patent Document 3 has an effect of preventing deformation of hair feet such as carpets on a floor surface having long hair feet such as carpets. However, the rear wheel is arranged on the bottom side of the floor nozzle. That is, since the rear wheel cannot have a large diameter, the gap between the lowermost part of the rear wheel and the bottom surface of the floor nozzle cannot be made large. Therefore, it is easy to sink in a long carpet or the like, and the bristle feet are easily entangled with the rear wheels, and rotation failure is likely to occur. However, it is difficult for the user to understand the rotation status, and as a result, the dust removal status of the surface to be cleaned by the rotary brush is also unknown. Furthermore, since the rotational drive source of the rotating brush is not a driving roller (rear wheel), there is a problem from the viewpoint of energy saving.

  The present invention has been made to solve the above-described problems, and even when cleaning a floor surface having a long bristle such as a carpet, the driving roller is reliably rotated, and the rotating brush is rotated by this rotational force. An object of the present invention is to provide a floor nozzle for a vacuum cleaner that can improve the cleaning efficiency by rotating the rotary brush and that allows the user to easily recognize the rotation state of the rotary brush via a driving roller.

  In order to solve the above-mentioned conventional problems, the invention of the floor nozzle for a vacuum cleaner according to claim 1 includes a floor nozzle body having a cleaning area and a traveling area, and a driving roller rotatably supported by the floor nozzle body. And a transmission mechanism for rotating the rotating brush forward and backward as the driving roller rotates, and the cleaning area has a suction port on a lower surface and faces the suction port, and the rotating brush is placed on the floor nozzle body. Is supported rotatably, and in the traveling region, the driving roller is rotatably supported by the floor nozzle body, and the height of the bottom surface of the floor nozzle body and the surface to be cleaned in the traveling region is increased. The height of the bottom surface of the floor nozzle main body and the surface to be cleaned in the cleaning area is set larger. Therefore, even when cleaning floor surfaces with long bristle feet such as carpets, the frictional resistance between the hair tips and the bottom surface of the traveling region is reduced by increasing the height of the bottom surface of the traveling region and the surface to be cleaned. Thus, since the friction resistance can be given to the driving roller, the driving roller can be rotated, and the rotating brush linked to the rotation of the driving roller can be rotated. Furthermore, it is possible to make it difficult to deform the hair end side of the carpet in the traveling region.

  The invention according to claim 2 is the floor nozzle for a vacuum cleaner having the configuration according to claim 1, wherein the plane including the bottom surface of the floor nozzle body in the traveling region and the plane including the bottom surface of the floor nozzle body in the cleaning region are It is characterized by not being parallel. With the above configuration, when the floor nozzle for a vacuum cleaner is moved in the forward direction, the floor surface of the floor nozzle body in the cleaning area can be increased in height, and the floor surface having a long bristle such as a carpet. Even when cleaning the hair, it is possible to prevent the bristle feet from collapsing and collapsing.

  According to a third aspect of the present invention, there is provided the floor nozzle for a vacuum cleaner having the configuration according to the second aspect, wherein the plane including the bottom surface of the floor nozzle body in the traveling region is a floor relative to the plane including the bottom surface of the floor nozzle body in the cleaning region. It is characterized in that the height with respect to the surface to be cleaned increases as it goes to the rear of the nozzle body. The floor nozzle for a vacuum cleaner is not only moved in the forward direction but also moved in the backward direction, so that the vicinity of the boundary between the cleaning area and the traveling area is closest to the floor surface, and the floor area becomes farther away from the vicinity of the boundary. If it is configured so that the height with the surface becomes large, in cleaning the floor surface with long bristle feet such as carpets, the wheel can give frictional resistance against the floor surface in the front-rear direction in which the wheel moves, and always By rotating the wheel, the rotating brush linked to the rotation of the wheel can be rotated.

  According to a fourth aspect of the present invention, there is provided a rotary brush rotatably supported in the suction port on a floor nozzle body having a cleaning region having a horizontally long suction port in front of the bottom surface and a traveling region in the rear, and one end of the suction port. A connecting pipe that communicates with the mouth and the other end protrudes behind the floor nozzle; a traveling roller in the cleaning area; a driving roller in the traveling area; and a rotational force of the driving roller to the rotating brush. Each having a transmission mechanism for transmitting, and the driving roller has both ends thereof mounted on a wheel storage portion cut out from the rear surface to the front surface side of the floor nozzle body and from the bottom surface to the upper surface so as to be close to both sides of the connection pipe. The transmission mechanism is rotatably supported, and the transmission mechanism is provided outside the driving roller, and the distance between the surface to be cleaned and the bottom surface of the traveling region is larger than the distance between the surface to be cleaned and the bottom surface of the cleaning region. Specially It is set to. As a result, the operating force for operating the floor nozzle body is reliably transmitted to the driving roller holding both shafts via the connecting pipe, and the rotational force rotates without loss via the transmission mechanism. It is transmitted to the brush and can help improve the cleaning efficiency.

  According to the first aspect of the present invention, the transmission mechanism can rotate the rotating brush in conjunction with the forward / reverse rotation of the driving roller, and the rotation of the rotating brush stops even when some dust such as hair is entangled with the rotating brush. There is nothing to do. Also, even when cleaning floors with long hairs such as carpets, by increasing the height of the bottom surface of the running area and the surface to be cleaned, friction resistance can be given to the driving roller, The driving roller can be rotated, and the rotating brush linked to the rotation of the driving roller can be rotated.

  According to the second aspect of the present invention, when the floor nozzle for a vacuum cleaner is moved in the forward direction, the height between the bottom surface of the floor nozzle body and the floor surface in the cleaning area can be increased. Even when a floor surface having a long foot is cleaned, it is possible to prevent the bristle feet from collapsing and collapsing. Further, in the invention of claim 3, in cleaning the floor surface having a long bristle such as a carpet, it is possible to give a frictional resistance in the front-rear direction in which the driving roller moves, and the driving roller can always be rotated, The rotating brush interlocking with the rotation of the driving roller can be rotated.

  According to the invention of claim 4, by providing the driving rollers near both sides of the connecting pipe, the operating force transmitted through the connecting pipe is reliably transmitted to the driving roller, and the rotational force is also applied to the rotating brush. It is transmitted and contributes to the improvement of cleaning efficiency. Furthermore, since the transmission mechanism is disposed outside the driving roller, the rotational force of the driving roller is linearly transmitted to the rotating brush via the rotating belt, which can contribute to a reduction in the number of parts. Furthermore, since the upper surface of the wheel storage portion that rotatably stores and supports the driving roller is open, the rotation of the driving roller can be seen well by the user, and thereby the rotation state of the rotating brush can be understood. Helps improve floor cleaning efficiency. In addition, when cleaning floors with long bristle feet, such as carpets, the upper surface is open, so that the hair tips can be prevented from being sandwiched between the upper surface and the driving roller, resulting in the rotation of the driving roller being stopped. . Furthermore, since the upper surface is open, it is easy to increase the diameter of the driving roller as necessary, and it is possible to cope with a reduction in operating force of the floor nozzle.

The perspective view which shows the state which attached the floor nozzle for vacuum cleaners which concerns on this invention to the vacuum cleaner main body. The perspective view of the floor nozzle for electric vacuum cleaners concerning the present invention Front view Rear view Plan view Same side view AA sectional view of FIG. The perspective view of the state which removed the upper cover of the floor nozzle for vacuum cleaners concerning this invention Front view The perspective view of the rotating brush which comprises this invention Cross section The rear view which shows 2nd Embodiment of the floor nozzle for vacuum cleaners which concerns on this invention. The rear view which shows 3rd Embodiment of the floor nozzle for vacuum cleaners which concerns on this invention. The rear view which shows 4th Embodiment of the floor nozzle for vacuum cleaners which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which the floor nozzle for a vacuum cleaner according to the present invention is attached to the main body of the vacuum cleaner. 2 is a perspective view of a floor nozzle for a vacuum cleaner according to the present invention, FIG. 3 is a front view thereof, FIG. 4 is a rear view thereof, FIG. 5 is a plan view thereof, and FIG. FIG. FIG. 7 is a cross-sectional view taken along the line AA in FIG. Further, FIG. 8 is a perspective view of the vacuum cleaner floor nozzle according to the present invention with the upper cover removed, and FIG. 9 is a front view thereof.

  The details of the floor nozzle 10 for a vacuum cleaner according to the present invention will be described with reference to FIGS. The floor nozzle 10 is connected to an extension pipe 50, the extension pipe 50 is connected to a hose 52 having an operation unit 51, and the hose 52 is connected to an electric vacuum cleaner main body 53 incorporating an electric blower (not shown). . The floor nozzle 10 includes a floor nozzle body 4 having an upper case 1 and a horizontally long suction port 2 and a lower case 3 in front of the lower surface. A bumper 5 is provided on the outer periphery of the floor nozzle body 4 to prevent the furniture from being damaged during cleaning.

  The floor nozzle body 4 is provided with a rotating brush chamber 7 that communicates with the suction port 2, and a rotating brush 6 is rotatably accommodated in the rotating brush chamber 7. The connecting pipe 8 is housed in the center part of the floor nozzle body 4 so as to be divided into left and right parts, the front end part communicates with the rotating brush chamber 7, and the shaft parts 8a formed on both sides of the front end part are provided in the upper case. 1 and the lower case 3 are supported so as to be tiltable by a predetermined angle from the rear to the front of the floor nozzle body 4, and the rear end portion protrudes from the rear portion of the floor nozzle body 4 and is connected to the extension pipe 50. The shaft portion 8a is closer to driving rollers 11 and 11A, which will be described later, than a driving roller 9, which will be described later, and a driving roller, which will be described later, with an operating force that causes the floor nozzle body 4 to travel through the extension pipe 50. This is because it is transmitted to 11 and 11A more reliably without loss and is rotated.

  Traveling rollers 9, 9 are provided at the front portion of the lower case 3 of the floor nozzle body 4, and the traveling rollers 9, 9 are rotatably supported by the floor nozzle body 4. And when the roller 9 for driving | running | working puts the floor nozzle 10 in to-be-cleaned surfaces, such as a flooring, a predetermined clearance gap is ensured between the cleaning surface and the bottom face of the lower case 3, and the floor nozzle 10 is a cleaning surface. To prevent the operability from being deteriorated.

  There are driving rollers 11 and 11A on both sides of the connecting pipe 8 (11A is a driving roller connected to the transmission mechanism 12 described later), and a predetermined width and a predetermined length from the rear surface of the nozzle body 4 to the front surface portion. The both sides of the drive wheel storage part 13 which is cut out only by the size and whose top and bottom surfaces are open are supported so as to be rotatable forward and backward. Thereby, in the case of carpet cleaning with a long bristle foot, if the upper surface is closed, the hair end side is sandwiched between the upper surface of the driving rollers 11 and 11A and the closed surface to inhibit rotation, but this is caused by the opening. Is preventing. Furthermore, since the upper surfaces of the driving rollers 11 and 11A are open, the diameter of the rollers can be increased as necessary. Of course, for the user, the rotation state of the driving roller 11A can also be visually confirmed, and even if the rotation stops, the correspondence can be reliably performed. In addition, when dust adheres to the outer surface of the driving rollers 11 and 11A, there is a risk that the dust will adhere to the floor surface and become dirty, but the driving rollers 11 and 11A may be cleaned in advance. Correspondence becomes possible. The upper ends of the drive rollers 11 and 11A have a large diameter so as to be located near the upper surface of the floor nozzle body 4, and the rotation state is easy to understand. The driving rollers 11 and 11A formed with a large diameter, although sinking under their own weight, have an increased ground contact area and are more susceptible to friction with the floor surface, that is, are configured to rotate reliably. The driving rollers 11 and 11A can be sized so that the upper surface protrudes from the upper surface of the floor nozzle body 4, and the rotation state can be made easier to understand. The transmission mechanism 12 can also be formed for each of the driving rollers 11 and 11A.

  A large number of kerfs 11b are formed on the outer peripheral surfaces of the driving rollers 11 and 11A in a direction perpendicular to the rotational direction thereof, and prevent slippage with the floor surface during the rotation. At the same time, it is easy for the user to understand the rotation state by irregular reflection of light. In addition, if this kerf 11b is colored differently from the outer surface, the user can understand the rotation state better. Further, since the driving rollers 11 and 11A are formed larger in width and diameter than the traveling rollers 9 and 9, the driving operation force of the floor nozzle 10 can be reliably received. When the driving roller 11 </ b> A rotates, the rotating brush 6 rotates through the transmission mechanism 12. The rotating brush 6 is configured to rotate both forward and reverse in conjunction with both forward and reverse rotations of the driving roller 11A.

  The fact that the rotation state of the driving roller 11A is known means that the rotation state of the rotary brush 6, that is, the cleaning state of the floor surface, so that, for example, the floor nozzle 10 can be moved back and forth many times in a dirty place. Or, in the unlikely event of non-rotation, the use can be stopped and the cause can be dealt with.

  As shown in FIGS. 8 and 9, the transmission mechanism 12 is housed outside the driving roller 11 </ b> A, and includes a gear 12 a, a gear 12 b, gears 12 c and 12 d of the rotating belt, and a side surface of the floor nozzle body 4. And a rotating belt 12e positioned on the side. When the driving roller 11A rotates, the coaxial gear 12a rotates, and the gear 12b engaged with the gear 12a rotates. Further, the gear 12c of the rotating belt coaxial with the gear 12b rotates, and the gear 12d of the rotating belt rotates through the rotating belt 12e. Since the rotating belt gear 12d is coaxial with the rotating brush 6, the rotating brush 6 is rotated by the rotation of the rotating belt gear 12d. With this configuration, the rotational force of the driving roller 11A can be transmitted linearly in one direction without loss.

  The transmission mechanism 12 sets the rotation ratio so that the rotating brush 6 rotates further when the driving roller 11A rotates once.

  As shown in FIG. 4, the floor nozzle body 4 described above is defined as a cleaning area A <b> 24 with the rear side of the rotating brush chamber 7 as a boundary and a traveling area B <b> 25 as a rear side. The rollers 9 and 9 and the rotating brush 6 are installed, and the driving rollers 11 and 11A and the connecting pipe 8 are installed in the traveling region B25. The transmission mechanism 12 is installed across the cleaning area A24 and the travel area B25. In addition, the floor nozzle main body 4 is reduced in size by protruding a part of drive rollers 11 and 11A from the driving | running | working area | region B25.

  Here, as shown in FIG. 7, the height b21 between the bottom surface B22 of the floor nozzle body 4 and the surface to be cleaned C19 in the traveling region B25 is defined as the bottom surface A18 and the surface to be cleaned C19 of the floor nozzle body 4 in the cleaning region A24. Is set to be larger than the height a20. By comprising in this way, even when cleaning floor surfaces with long bristle feet such as carpets, friction resistance can be given to the driving roller 11A, so that the driving roller 11A can be rotated and driven. The rotating brush 6 interlocked with the rotation of the roller 11A can be rotated.

  Further, as shown in FIG. 7, the plane including the bottom surface B22 of the floor nozzle body 4 in the traveling area B25 and the plane including the bottom surface A18 of the floor nozzle body 4 in the cleaning area A24 are not parallel, but in the traveling area B25. The plane including the bottom surface B22 of the floor nozzle body 4 has a height 21 with the surface to be cleaned C19 that increases toward the rear of the floor nozzle body 4 with respect to the plane including the bottom surface A18 of the floor nozzle body 4 in the cleaning region A24. It is set as follows.

  By configuring in this way, when the vacuum cleaner floor nozzle 10 is moved in the forward direction, the height a20 between the bottom surface A18 of the floor nozzle body 4 and the surface to be cleaned C19 in the cleaning region A24 can be increased. In addition, even when a floor surface having a long bristle such as a carpet is cleaned, the bristle can be prevented from falling and being crushed. Further, since the floor nozzle 10 for a vacuum cleaner is not only moved in the forward direction but also moved in the backward direction, the vicinity of the boundary between the cleaning area A24 and the traveling area B25 is closest to the surface to be cleaned C19, If the height b21 with the surface to be cleaned C19 is increased as the distance from the vicinity of the boundary increases, the driving roller 11A is driven in the front-rear direction in which the driving roller 11A moves in the cleaning of a floor surface having a long bristle such as a carpet. The roller 11A for driving can give a frictional resistance to the floor surface, the roller 11A for driving can always be rotated, and the rotating brush 6 interlocked with the rotation of the roller 11A for driving can be rotated.

  FIG. 10 is a perspective view of the rotating brush 6 constituting the floor nozzle 10 for a vacuum cleaner of the present invention, and FIG. 11 is a cross-sectional view thereof. As shown in these drawings, the rotating brush 6 is made of a metal material such as aluminum, and has four grooves 14a, 14a, 14a, 14a that are opened outwardly evenly in the longitudinal direction of the outer peripheral surface. The cleaning body 15 includes a rotor 14 provided, a base portion 15a fitted and mounted in the groove portion 14a, and a brush portion 15b formed in a substantially band shape.

  As shown in FIG. 11, the rotary brush 6 is formed so that the extension line A <b> 26 of the cleaning body 15 in the hair length direction does not pass through the rotation center B <b> 27 of the rotor 14. By configuring in this way, the cleaning body 15 on the front side with respect to the rotational direction of the rotating brush 6 can be compared with the surface to be cleaned as compared with the case where the extension line in the hair length direction of the cleaning body passes through the rotation center of the rotor as in the prior art. Therefore, the cleaning body 15 on the rear side with respect to the rotation direction of the rotating brush 6 is brought into contact with the surface to be cleaned at an acute angle, and thus has a more scraping effect. Therefore, the rotating brush 6 can efficiently scrape and wipe off dust adhering to a long carpet or the like.

  FIG. 12: is a rear view which shows 2nd Embodiment of the floor nozzle for vacuum cleaners which concerns on this invention. The floor nozzle 10a in this embodiment has a waveform in which convex portions 16a and concave portions 16b are alternately and continuously formed on the bottom surface of the traveling region of the floor nozzle body 4 in a longitudinal direction substantially parallel to the traveling direction. The curved surface 16 is used. By forming the corrugated curved surface 16 in this way, when the bottom surface of the running region of the floor nozzle body 4 comes into contact with a carpet having a long bristle, the hair tip of the carpet or the like makes a line contact with the convex portion 16a. It is possible to reduce the frictional resistance against a carpet having a long foot, and the floor nozzle can be operated smoothly. Further, since the suction airflow can be taken into the rotating brush chamber 7 along the corrugated curved surface 16, dust inside the carpet having a long hair length can be more efficiently removed.

  FIG. 13: is a rear view which shows 3rd Embodiment of the floor nozzle for vacuum cleaners which concerns on this invention. The floor nozzle 10b in this embodiment is provided with wheel lock means 17 in the vicinity of the driving roller 11A. The wheel lock means 17 locks the rotation of the driving roller 11 via the transmission mechanism 12 when the rotating brush 6 is locked with rotation of the rotating brush 6 due to tangled dust having a long hair length. At that time, if the driving roller 11A is forcibly rotated, the cleaning roller 19A may be damaged by the driving roller 11A, and the transmission mechanism 12 may be destroyed. When a predetermined gear or more is applied to the driving roller 11A by urging and pressing the predetermined gear with a spring or the like, a configuration in which the gear is disengaged or the timing belt is connected to the driving roller 11A When a torque greater than a predetermined value is applied to the wheel, the wheel lock means 17 functions so as to release the connection between the transmission mechanism 12 and the driving roller 11A by adopting a configuration that slips and does not transmit temporarily. It is configured.

  FIG. 14: is a top view which shows 4th Embodiment of the floor nozzle for vacuum cleaners which concerns on this invention. The storage position of the driving roller 11A in this embodiment in the floor nozzle 10c is formed closer to the connecting pipe 8 and the distance from the outside of the connecting pipe 8 to the outer surface of the floor nozzle 10c is L. When the distance from the outside of the tube 8 to the center line in the rotation direction of the driving roller 11A is I, L ≧ 2I is desirable. As a result, the operating force from the operating portion 51 is transmitted to the connecting pipe 8 via the extension pipe 50. However, since the driving roller 11A is disposed in the vicinity of the connecting pipe 8, the deflection of the lower case 3 is reduced. Since it can be prevented and reliably transmitted to the driving roller 11A without loss, the driving roller 11A can rotate. Moreover, the driving roller 11 </ b> A is difficult to protrude even when cleaning a floor with a step such as a sill. That is, the rotating brush can rotate reliably, and its cleaning efficiency can be stably and improved. In addition, the combination of each embodiment of this invention can be performed freely.

  The floor nozzle for a vacuum cleaner of the present invention is used by being connected to the end of an extension pipe of the vacuum cleaner.

DESCRIPTION OF SYMBOLS 1 Upper case 2 Suction port 3 Lower case 4 Floor nozzle body 5 Bumper 6 Rotating brush 7 Rotating brush chamber 8 Connection pipe 9 Traveling roller 10, 10a, 10b Floor nozzle 11, 11A Driving roller 11b Cut groove 12 Transmission mechanism 12a, 12b, 12c, 12d Gear 12e Rotating belt 13 Wheel housing part 14 Rotor 14a Groove part 15 Cleaning body 15a Base part 15b Brush part 16 Curved surface 16a Convex part 16b Concave part 17 Wheel lock means 18 Bottom surface A
19 Surface to be cleaned C
20 Height a
21 Height b
22 Bottom B
24 Cleaning area A
25 Traveling area B
26 Extension line A
27 Center of rotation B

Claims (4)

  A floor nozzle body having a cleaning area and a traveling area, a driving roller rotatably supported by the floor nozzle body, and a transmission mechanism for rotating the rotating brush forward and backward as the driving roller rotates, The cleaning area has a suction port on a lower surface thereof, and the rotary brush is rotatably supported by the floor nozzle body so as to face the suction port. In the traveling area, the driving roller is disposed on the floor nozzle body. The height of the bottom surface of the floor nozzle body and the surface to be cleaned in the traveling region is set to be larger than the height of the bottom surface of the floor nozzle body and the surface to be cleaned in the cleaning region. A floor nozzle for vacuum cleaners.   The floor nozzle for a vacuum cleaner according to claim 1, wherein the plane including the bottom surface of the floor nozzle body in the traveling region and the plane including the bottom surface of the floor nozzle body in the cleaning region are not parallel.   The plane including the bottom surface of the floor nozzle body in the traveling area is set so that the height with the surface to be cleaned becomes larger toward the rear of the floor nozzle body relative to the plane including the bottom surface of the floor nozzle body in the cleaning area. The floor nozzle for a vacuum cleaner according to claim 2, wherein the floor nozzle is a vacuum cleaner.   A cleaning nozzle with a horizontally long suction port in front of the bottom, a floor nozzle body with a running region in the rear, a rotating brush rotatably supported in the suction port, and one end communicating with the suction port, etc. A connecting pipe having an end protruding rearward of the floor nozzle, a traveling roller in the cleaning region, a driving roller in the traveling region, and a transmission mechanism for transmitting the rotational force of the driving roller to the rotating brush. Each of the driving rollers is rotatably supported at both ends thereof by a wheel storage portion cut out from the rear surface to the front surface side of the floor nozzle body and from the bottom surface to the upper surface so as to be close to both sides of the connection pipe, The transmission mechanism is provided outside the driving roller, and the distance between the surface to be cleaned and the bottom surface of the traveling region is larger than the distance between the surface to be cleaned and the bottom surface of the cleaning region. Electric vacuum cleaner Floor nozzle.

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