JP2014033738A - Suction port body for cleaner and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body for a cleaner, capable of suppressing that a foreign body enters an electric motor side driving a rotary cleaning body during maintenance work of a suction head.SOLUTION: A suction port body 15 includes a head case 21, a rotary cleaning body, an electric motor, a transmission belt 61, and an obstacle 65. The head case 21 has: support parts respectively provided in both end parts; and a detachable cover 27. The rotary cleaning body attached/detached in a state that the cover 27 is detached is detachably supported to the support parts and is disposed in a space between the support parts. The rotary cleaning body has a driven wheel 45 housed inside one support part 22a. The electric motor is housed in the head case 21 in the rear of the rotary cleaning body. The transmission belt 61 passing an opening part 25 formed in the bottom of the support part 22a is wound and hung over a driving wheel 52 of the electric motor disposed such that the driving wheel 52 faces to the driven wheel 45 from the rear side thereof and the driven wheel 45. The obstacle 65 is disposed between upper and lower belt portions 61a, 61b of the transmission belt 61 over the driving wheel 52 and the driven wheel 45.

Description

  FIELD Embodiments described herein relate generally to a vacuum cleaner suction port having a rotary cleaning body driven by an electric motor, and a vacuum cleaner including the suction port body.

  As the suction port body of an electric vacuum cleaner, a suction head that incorporates a rotary cleaning body and an electric motor for driving it is often used. The driven wheel that the rotary cleaning body has at one end thereof and the drive wheel that the electric motor has are interlocked by a transmission belt made of a timing belt wound over these, so that the rotary cleaning that is rotated by driving the electric motor The body can scrape dust on the surface to be cleaned.

  During cleaning, dust such as hair and lint adheres to the rotary cleaning body and its surroundings. In response to this, the suction port body is configured to be capable of removing dust adhering to the rotary cleaning body and the suction head (hereinafter referred to as “care”).

  That is, a part of the suction head is formed by a detachable cover, and the rotary cleaning body can be removed from the suction head by removing this cover. Thereby, the rotary cleaning body removed from the suction head and the suction head in a state where the rotary cleaning body is removed can be maintained.

  By the way, even when the rotary cleaning body is removed for cleaning the suction head, the transmission belt is passed through an opening formed in the suction head. The opening is formed to have an opening area sufficient for the transmission belt to pass through, and in a state of care, the cover and the rotary cleaning body are removed, so that the opening is exposed together with the transmission belt. ing.

  For this reason, in the care of removing dust around the transmission belt using a brush or the like, a part of the dust to be removed enters the side of the motor built in the suction head through the opening as foreign matter. there's a possibility that. In addition, even during cleaning, if relatively large dust may reach the inner surface of the transmission belt as the rotary cleaning body rotates, the dust is conveyed as foreign matter by the transmission belt and enters the motor side. There are things to do.

  Moreover, what is equipped with the floor surface detection member is known in the suction inlet. The floor surface detection member protrudes from the lower surface of the suction head and is movable up and down. When the floor surface detection member is away from the surface to be cleaned, the motor cannot be energized, but when the floor surface detection member is pushed up by the surface to be cleaned, the motor that drives the rotary cleaning body is not energized. Is possible.

  For this reason, when the cleaning worker does not turn off the power and uses a brush or the like to clean the dust around the transmission belt, the floor detection member may be accidentally touched by the hand holding the suction head. There is a possibility that the electric motor is operated by being pushed. When this happens, the transmission belt is moved unexpectedly, so that the brush or the like may be conveyed by the transmission belt as foreign matter and enter the motor side through the opening.

  When the foreign matter that has entered the motor side in this way is caught in the meshing portion between the drive wheel and the transmission belt, a part of the teeth formed on the inner surface of the transmission belt may be damaged. When such a situation is reached, there is a possibility that transmission failure may occur and rotation of the rotary cleaning body becomes unsmooth.

JP 2012-115614 A JP 2010-35793 A

  Embodiments provide a suction port body for a vacuum cleaner that can prevent foreign matter from entering the motor side that drives the rotary cleaning body with the cleaning of the suction head, and a vacuum cleaner including the same. is there.

  In order to solve the above-mentioned subject, the suction mouth for vacuum cleaners of an embodiment comprises a head case, a rotation cleaning object, an electric motor, a power transmission belt, and an obstacle. The head case has support portions provided at both ends, and a removable cover. A rotary cleaning body that is attached and detached with the cover removed is detachably supported by a support portion and disposed in a space between the support portions. The rotary cleaning body has a driven wheel accommodated in one support portion. The electric motor is accommodated in the head case behind the rotary cleaning body. A transmission belt passing through an opening formed at the base of one support portion is wound around a drive wheel and a driven wheel of an electric motor arranged so as to face the driven wheel from the rear side. The obstacle is characterized in that the obstacle is disposed between the upper and lower belt portions extending between the driving wheel and the driven wheel of the transmission belt.

It is a perspective view which shows the vacuum cleaner which concerns on one embodiment. It is a perspective view which shows the suction inlet provided with the vacuum cleaner of FIG. It is a top view which shows the suction inlet body of FIG. It is sectional drawing shown along the F4-F4 line | wire in FIG. It is a perspective view shown in the state which turned upside down the suction inlet body of FIG. It is a perspective view which shows the suction inlet body of FIG. 2 with the cover isolate | separated from this. It is a perspective view which shows the suction inlet body of FIG. 2 in the state from which the cover and the rotation cleaning body were removed. It is a perspective view which expands and shows the F8 part in FIG. It is a top view which shows the suction inlet body of FIG. 2 in the state from which the cover and the upper case member were removed. It is a perspective view which shows the bumper arrange | positioned at the one end part of the suction inlet of FIG.

  Hereinafter, the vacuum cleaner and its suction port according to one embodiment will be described in detail with reference to FIGS.

  FIG. 1 is a perspective view showing an entire canister-type vacuum cleaner, for example. The vacuum cleaner 1 includes a vacuum cleaner body 2, dust collection means such as a dust collection bag 3, an electric blower 4, a dust suction hose 7, an extension pipe 11, a suction port body 15, and the like.

  The vacuum cleaner main body 2 can freely move on an indoor floor surface to be cleaned by wheels or the like attached thereto. The vacuum cleaner main body 2 has a dust collection chamber lid 2a that forms an upper surface of the front portion and that can be opened and closed. A dust collection chamber (not shown) is provided in the vacuum cleaner body 2 so as to be directly below the dust collection chamber lid 2a, and is sucked into the rear side of the dust collection chamber, in other words, the vacuum cleaner body 2. A blower chamber (not shown) and a power supply chamber (not shown) are provided on the downstream side of the dust collection chamber based on the passing airflow.

  For example, a dust suction port 2 b is provided on the front surface of the cleaner body 2. A dust collection bag 3 is accommodated in the dust collection chamber. The inside of the dust collection bag 3 accommodated in the dust collection chamber communicates with the dust suction port 2b. The dust collection bag 3 can be taken in and out of the dust collection chamber with the dust collection chamber lid 2a opened.

  The electric blower 4 is accommodated in the blower chamber. The suction negative pressure generated by the operation of the electric blower 4 is spread upstream from the electric blower 4. At the same time, the air discharged from the electric blower 4 to the downstream side is discharged out of the cleaner body 2 through an exhaust portion (not shown) provided at the rear portion of the cleaner body 2. A cord reel is accommodated in the power supply chamber, and the power cord 5 can be pulled out from the rear surface of the cleaner body 2. In addition, as means for supplying power to the electric blower 4, a secondary battery may be used instead of the cord reel.

  A rear end portion 7a of a dust suction hose 7 having a bellows-like flexible hose portion is detachably inserted and connected to the dust suction port 2b. The front end portion (tip end portion) 7b of the dust suction hose 7 has a handle 8 that is gripped by a cleaning operator in order to move and operate a suction port body 15 described later. An operation unit 9 is provided on the handle 8. The operation unit 9 includes a touch switch, a lamp, and the like that output a command signal for controlling the operation of the electric blower 4.

  The rear end portion of the extension pipe 11 is inserted into the front end portion 7b of the dust suction hose 7 and is detachably connected. The extension pipe 11 is, for example, a double joint type having an upstream pipe 11a and a downstream pipe 11b. The upstream side pipe 11a can be pushed in and pulled out from the front side with respect to the downstream side pipe 11b, whereby the length of the extension pipe 11 can be adjusted. Connected to the front end 7b of the dust suction hose 7 is the rear end of the downstream pipe 11b.

  A suction port body 15, which will be described later, is detachably connected to the distal end portion of the extension tube 11, that is, the front end portion of the upstream tube 11a. The dust suction hose 7 and the extension pipe 11 form a dust transport pipe that allows the dust collection chamber and the suction port body 15 to communicate with each other.

  When cleaning is performed using the electric vacuum cleaner 1, the electric blower 4 is driven by operating the operation unit 9. The dust on the surface to be cleaned is sucked together with air from the suction port body 15 by the blowing force of the electric blower 4 thereby. Since this dust-containing air is guided to the dust collection chamber of the cleaner body 2 via the extension pipe 11 and the dust suction hose 7, the dust is filtered in the dust collection bag 3 in this chamber, and dust is collected in this bag. Be captured. The air that has passed through the dust bag 3 is sucked into the electric blower 4, passes through the electric blower 4, and then is discharged out of the cleaner body 2 through the exhaust part of the cleaner body 2. Therefore, the surface to be cleaned can be cleaned by such dust absorption.

  Next, the suction inlet 15 will be described with reference to FIGS. As shown in FIGS. 2 to 5, the suction port 15 is suitable for floor cleaning, and includes a suction head 16 and a connecting pipe 17. The rear end portion of the connection pipe 17 is connected to the front end portion of the upstream pipe 11a of the extension pipe 11 so as to be detachable from the front side. In addition, the rear end part of the connection pipe 17 can be detachably connected to the front end part 7b of the dust suction hose 7 from the front side with the extension pipe 11 removed.

  The suction head 16 includes a head case 21, a dust suction pipe 35, a rotary pipe 37, a rotary cleaning body 41, an electric motor 51, a control circuit 55, a transmission belt 61, an obstacle 65, and a floor surface detection member 71. Etc.

  The head case 21 includes a lower case member 22, an upper case member 24, a cover 27, left and right side bumpers 32, 33, and the like.

  As shown in FIG. 9, the lower case member 22 is opened upward. At the same time, as shown in FIGS. 6 and 7, the lower case member 22 has support portions 22 a and 22 b integrally at both ends in the longitudinal direction. The support portions 22a and 22b extend in the front-rear direction, and protrude forward in the present embodiment. The lower case member 22 may be formed to have a front edge portion that extends over the front end portions of the support portions 22a and 22b.

  Both end portions in the longitudinal direction of the lower case member 22 form lower portions of both end portions in the width direction of the head case 21. The side walls 22c of the support portions 22a and 22b facing the space S (see FIG. 7) between the support portions 22a and 22b have a semicircular groove 22d that opens upward as shown in FIG. .

  The lower case member 22 has a receiving plate portion 23 that projects rearward and integrally from the center in the longitudinal direction. The receiving plate portion 23 has a groove that extends in the front-rear direction at the center in the width direction and communicates with the inside of the lower case member 22. The groove has an arc shape in the left-right direction.

  The upper case member 24 is opened downward. The upper case member 24 covers the lower case member 22 from above except for the support portions 22a and 22b and the receiving plate portion 23, and is connected to the lower case member 22 by screws or the like.

  Both the left and right support portions 22 a and 22 b are open upward, and one of them, for example, the inside of the support portion 22 b communicates with the inside of the head case 21 covered with the upper case member 24. The opening 25 for this communication is provided in the head case 21 at the base of the support portion 22b as shown in FIG. The opening 25 is formed by closing the open upper end of the opening groove provided in the lower case member 22 with the upper case member 24.

  As shown in FIGS. 2 to 4, the cover 27 includes a cover main body 28, a front bumper 29, and a pair of locking members 30.

  The cover body 28 is formed in a size that covers the support portions 22a and 22b from above at both ends in the longitudinal direction. The cover main body 28 has rib-shaped partition walls (not shown) on the back surfaces of both ends in the longitudinal direction. These partition walls are provided corresponding to the side walls 22c. Along with this, a semicircular groove that opens downward corresponding to the groove 22d is formed in these partitions.

  The front bumper 29 is attached so as to cover the front edge portion of the cover main body 28. The front bumper 29 is formed of a resin member that is softer than the hard synthetic resin that forms the cover main body 28. The locking member 30 is attached to the rear edge portion of the cover main body 28 and both left and right end portions so as to be slidable in the left-right direction by an artificial operation.

  The cover 27 is attached to the head case 21 so as to cover the space S from above and from the front to form a front portion of the head case 21. At the same time, both end portions of the cover 27 cover the support portions 22a and 22b from above. By attaching the cover 27, a horizontally long dust suction opening (not shown) corresponding to the space S is formed in the front lower surface of the suction head 16.

  The cover 27 can be attached to and detached from the head case 21 from above. In order to allow the cover 27 to be attached, a pair of downward claws 28a are formed in the cover body 28 as shown in FIG. The claws 28a are engaged with the claw receiving portions 26 (see FIG. 9) formed inside the support portions 22a and 22b from above, and the locking members 30 are slid in a direction approaching each other, and the upper case member 24 is engaged. The cover 27 is attached to the front portion of the head case 21 from above by engaging with the cover holding portion 24a (see FIGS. 6 and 7) formed on the head case 21. When the cover 27 is attached to the head case 21 and the locking member 30 of the cover 27 is slid away from each other, the engagement between the locking member 30 and the cover holding portion 24a is released. Therefore, thereafter, the cover 27 can be removed from the head case 21 by lifting the cover 27 while removing the claw 28 a from the claw receiving portion 26.

  The side bumpers 32 and 33 are disposed so as to cover the front and side surfaces of both end portions in the width direction of the head case 21. The side bumpers 32 and 33 are made of a synthetic resin softer than the hard synthetic resin forming the lower case member 22, the upper case member 24, and the cover body 28, for example, polypropylene.

  The rear part of the side bumper 32 is sandwiched vertically by the lower case member 22 and the upper case member 24 so as not to come off between them. The parts other than the rear part of the side bumper 32 are the lower case member 22. The support portion 22a and the upper case member 24 are vertically sandwiched by one end portion in the longitudinal direction. Similarly, the rear part of the other side bumper 33 is sandwiched up and down by the lower case member 22 and the upper case member 24 so as not to be separated between them, and the parts other than the rear part of the side bumper 33 are The lower case member 22 is sandwiched vertically between the support portion 22b and the upper case member 24 in the longitudinal direction. The upper case member 24 can be brought into contact with and separated from the side bumpers 32 and 33 from above.

  As shown in FIGS. 6 and 7, the dust suction tube 35 is disposed at the center in the longitudinal direction of the head case 21 and is sandwiched between the lower case member 22 and the upper case member 24 so as not to rotate. . As shown in FIG. 9, the dust suction pipe 35 has a trumpet shape that gradually increases in diameter from the rear end toward the front end, and the front end is opened in the space S as shown in FIG.

  The rotary tube 37 is rotatably connected to the rear portion of the dust suction tube 35. The rotary tube 37 and the dust suction tube 35 are in communication with each other. The lower portion of the rotating tube 37 is fitted in a groove of the receiving plate portion 23, and the rotating tube 37 can rotate around a central axis extending in the front-rear direction along the arc surface of the groove.

  As shown in FIGS. 6 and 9, the rotary cleaning body 41 includes bearings 42 and 43 at both left and right ends, and a cleaning body assembly 44 that is rotatably supported by these bearings 42 and 43. For example, one bearing 43 arranged on the right side in FIG. 9 has a driven wheel 45 formed of a toothed wheel. The cleaning body assembly 44 is formed, for example, by attaching a cleaning member 44b to a rotary shaft 44a supported at both ends by bearings 42 and 43. The cleaning member 44b shown in FIG. 9 is a cleaning blade made of a soft material such as rubber. However, the cleaning member 44b may be a bristle, or both the cleaning blade and the brush may be attached to the rotating shaft 44a. In addition, in order to make an understanding of a figure easy, in FIG. 6, the cleaning body assembly 44 was drawn simplified.

  The rotary cleaning body 41 is disposed in the space S with the bearings 42 and 43 at both ends thereof removably supported by the support portions 22 a and 22 b of the head case 21. The front end opening of the dust suction tube 35 is opposed to the central portion in the longitudinal direction of the cleaning assembly 44 disposed in the space S from the rear side.

  The rotary cleaning body 41 is attached to the head case 21 in the following procedure.

First, one bearing 42 of the rotary cleaning body 41 is fitted from above to a rotation preventing portion 22e (see FIG. 9) formed inside the support portion 22a to be prevented from rotating. At the same time, the other bearing 43 of the rotary cleaning body 41 is fitted into the rotation preventing portion 22f (see FIG. 9) formed inside the support portion 22b from above to be prevented from rotating. By such incorporation, the cleaning body assembly 44 of the rotary cleaning body 41 is disposed in the space S.
Next, the cover 27 is attached to the front portion of the head case 21 from above by the procedure described above. Thus, the left and right end portions of the cover 27 cover the support portions 22a and 22b from above, and the bearings 42 and 43 are sandwiched from above and below by the partition wall (not shown) on the back surface of the cover 27 and the side wall 22c.

  The attachment of the rotary cleaning body 41 is completed by the procedure described above. By going through the reverse procedure of this mounting procedure, that is, first, the cover 27 is removed from the head case 21, and then the rotary cleaning body 41 is removed from the front of the head case 21 with the cover 27 removed. It is possible to remove it upward.

  As shown in FIG. 9, the electric motor 51 is built in the head case 21 on the rear side of the support portion 22 b and between the support portion 22 b and the dust suction pipe 35. The electric motor 51 has a drive wheel 52 formed of a toothed vehicle attached to the output shaft 51a. The drive wheel 52 is paired with the driven wheel 45 of the rotary cleaning body 41 and is disposed so as to face the driven wheel 45 from the rear side.

  3 indicates a first outside air inlet comprising a plurality of slits opened at the rear edge of the upper case member 24, and reference numeral 54 in FIGS. 6 and 7 faces the space S in the lower case member 22. The 1st external air exit which consists of a plurality of slits opened by is shown. The outside air sucked from the first outside air inlet 53 is cooled by the motor 51 and is sucked into the space S from the first outside air outlet 54.

  The control circuit 55 is used for controlling the operation of the electric motor 51. The control circuit 55 is formed by mounting necessary circuit components on the circuit board as shown in FIG. 9, and is built in the head case 21 so as to be located on the opposite side of the electric motor 51 with the dust suction pipe 35 as a boundary. ing. The control circuit 55 and the electric motor 51 are electrically connected via an electric wiring (not shown).

  3 indicates a second outside air inlet composed of a plurality of slits opened at the rear edge of the upper case member 24, and reference numeral 57 in FIGS. 6 and 7 indicates the upper case member 24 and the lower case member 22. The 2nd external air exit which consists of several slits opened facing the space S is shown. The outside air sucked from the second outside air inlet 56 is cooled by the control circuit 55 to be sucked into the space S from the second outside air outlet 57.

  The transmission belt 61 is an endless annular belt having teeth (not shown) formed on the inner surface thereof. The transmission belt 61 is wound around the driving wheel 52 and the driven wheel 45 through the opening 25 of the head case 21 as shown in FIG. The driven wheel 45 of the rotary cleaning body 41 can be removed from the transmission belt 61.

  When cleaning is performed using the electric vacuum cleaner 1, the driving force of the electric motor 51 is applied to the driven wheel 45 via the transmission belt 61, and the rotary cleaning body 41 is rotated. Thereby, the rotary cleaning body 41 can scrape off dust on the surface to be cleaned by the cleaning member 44b.

  As shown in FIG. 4 and the like, the obstacle 65 includes an upper belt portion 61 a extending between the driven wheel 45 of the transmission belt 61 and the upper end of the driving wheel 52, and a lower belt extending between the driven wheel 45 of the transmission belt 61 and the lower end of the driving wheel 52. It arrange | positions between the site | parts 61b. Therefore, the obstacle 65 is disposed between the front driven wheel 45 and the rear driving wheel 52.

  The obstacle 65 is opposed to the opening 25 of the head case 21 from the rear side in the electric motor housing chamber formed between the lower case member 22 and the upper case member 24, for example, and in the vicinity of the opening 25. Is arranged. For this reason, when the opening part 25 is seen from the front side, a part of the opening part 25 is also closed by the obstacle 65 so that the opening area of the opening part 25 is reduced. The obstacle 65 may be disposed in the opening 25 or in the vicinity of the front side of the opening 25.

  As shown in FIG. 10, the obstacle 65 is formed integrally with the side bumper 33 that contacts the support portion 22b. For this reason, the obstacle 65 can be elastically deformed. According to the configuration in which the obstacle 65 is integrally formed with the side bumper 33 as described above, the number of parts and the number of assembly steps are reduced and the cost is reduced as compared with the case where the obstacle 65 and the side bumper 33 are separate. it can.

  The upper edge 65a (see FIG. 10) of the obstacle 65 is close to the side surface on which the teeth of the upper belt portion 61a are formed as shown in FIG. Similarly, the lower edge 65b (see FIG. 10) of the obstacle 65 is close to the side surface on which the teeth of the lower belt portion 61b are formed.

  Further, as shown in FIG. 9, the obstacle 65 crosses the transmission belt 61, and the tip 65 c protrudes to the side of the side bumper 32. Therefore, the obstacle 65 is provided across the opening 25. The front end portion 65c of the obstacle 65 is held by a holding portion 22g formed integrally with the lower case member 22 of the head case 21. The holding portion 22g has, for example, a groove shape, and is engaged in a state in which the tip portion 65c is fitted into the holding portion 22g. Thereby, the tip 65c is provided so as to be sandwiched from the front and rear. The holding portion 22g may be provided so as to restrain the obstacle 65 so that the obstacle 65 does not move freely in the front-rear direction with its root as a fulcrum, as described above. It is not restricted to the structure which restrains the front-end | tip part 65c.

  The floor surface detection member 71 shown in FIG. 5 is disposed on the lower case member 22 in order to allow and prohibit energization of the electric motor 51. The floor surface detection member 71 is close to the support portion 22b, that is, at a position where the operator's hand holding the head case 21 may touch when cleaning around the support portion 22b as will be described later. Is provided.

  The floor surface detection member 71 is urged by a spring (not shown) so as to hold the state of protruding from the lower surface of the lower case member 22, and is movable up and down. In addition, a contact portion 71a such as a roller that contacts the surface to be cleaned is provided. When the floor surface detection member 71 is pushed up by the surface to be cleaned, for example, the electric motor 51 can be energized. In addition, when the floor surface detection member 71 is not pressed such as being away from the surface to be cleaned, energization of the electric motor 51 is prohibited.

  Note that reference numeral 73 in FIG. 5 denotes a wheel attached to the lower case member 22 so that a part of the lower case member 22 protrudes from the lower surface in order to smoothly move the suction port 15 along the surface to be cleaned. . The protruding height of the floor surface detection member 71 with respect to the lower surface of the lower case member 22 is set to be higher than the protruding height of each wheel 73 with respect to the lower surface of the lower case member 22. Thereby, the detection operation of the floor surface (surface to be cleaned) is possible. Further, in order to facilitate understanding of the drawing, the cleaning body assembly 44 is drawn in a simplified manner in FIG.

  The front end portion (front end portion) of the connection pipe 17 is connected to a rear end portion of the rotary pipe 37 via a pair of connecting pivots (not shown) provided along a direction orthogonal to the central axis of these pipes. Are connected. Accordingly, the front end portion of the connection pipe 17 and the rotary pipe 37 form a so-called universal joint, and the connection pipe 17 can be rotated in the vertical direction with respect to the rotary pipe 37. The connecting pipe 17 and the rotary pipe 37 thus connected are in communication with each other. Therefore, the dust-containing air sucked into the dust suction pipe 35 during cleaning passes from the rotary pipe 37 through the connection pipe 17 to the extension pipe 11. Led to.

  2 to 4, reference numeral 72 denotes a pair of power supply pins that are electrically connected to the control circuit 55 via electrical wiring (not shown). The power feed pin 72 is in contact with a power feed terminal (not shown) attached to these connection objects in a state where the rear end of the connection pipe 17 is connected to the front end of the extension pipe 11 or the front end 7b of the dust suction hose 7. The Thereby, it is possible to energize the electric motor 51.

  During cleaning, a part of the dust scraped up with the rotation of the rotary cleaning body 41 may get entangled with the cleaning body assembly 44 of the rotary cleaning body 41 and may adhere to the wall surface facing the space S. Care for removing such dust in a timely manner is performed as follows.

  First, the cover 27 is removed from the head case 21 in the above-described procedure. FIG. 6 shows a state where the cover 27 is removed. Next, the rotary cleaning body 41 is removed. In this case, first, the left and right ends of the rotary cleaning body 41 are pulled out above the support portions 22a and 22b, and then the rotary cleaning body 41 is moved in the left direction in FIG. 42 is extracted from the front end of the transmission belt 61. Thereby, the rotary cleaning body 41 is removed. FIG. 7 shows a state of the head case 21 from which the rotary cleaning body 41 has been removed.

  Next, the dust attached to the rotary cleaning body 41 is removed by cleaning the rotary cleaning body 41 that has been removed and is in a single product state.

  Further, the head case 21 is cleaned using a brush or the like (not shown) to remove dust attached to the head case 21. In this case, since the cover 27 and the rotary cleaning body 41 are removed as described above, the support portion 22b is open upward and a wide working space is secured around it. Therefore, it is possible to easily carry out care using a brush or the like.

  When cleaning the head case 21, when dust that has entered the support portion 22 b or dust that has adhered to the side wall 22 c is removed using a brush or the like, a part of the dust moved by the brush or the like is collected. Thus, the transmission belt 61 may be moved toward the opening 25 through which the transmission belt 61 passes. However, the obstacle 65 is disposed between the upper belt portion 61 a and the lower belt portion 61 b of the transmission belt 61 and in the vicinity of the opening 25. For this reason, the obstacle 65 prevents a part of the dust moved by the brush or the like from entering the interior of the motor housing chamber as a foreign object.

  In this case, the upper edge 65a of the obstacle 65 is approached to the upper belt portion 61a, and the lower edge 65b of the obstacle 65 is approached to the lower belt portion 61b. A larger facing area can be secured. Accordingly, it is possible to more effectively prevent foreign matter from entering the motor storage chamber.

  As described above, in the care of the head case 21, foreign matters such as dust are prevented from entering so as to be sandwiched between the meshing portions of the drive wheels 52 and the transmission belt 61. For this reason, part of the teeth formed on the inner surface of the transmission belt 61 can be prevented from being damaged due to the biting of dust (foreign matter) during cleaning with the electric vacuum cleaner 1 after cleaning. Therefore, transmission failure due to the transmission belt 61 hardly occurs, and it is possible to eliminate the possibility that the rotation of the rotary cleaning body 41 becomes unsmooth during cleaning.

  Further, even when a brush or an operator's fingertip is accidentally inserted into the opening 25 in the maintenance of the head case 21, the obstacle 65 becomes an obstacle and further enters the interior of the motor housing chamber. It is prevented.

  When the suction port body 15 is separated from the surface to be cleaned, such as upside down, as the floor detection member 71 does not detect the surface to be cleaned, even if the motor 51 is in an operating state, The electric motor 51 is stopped. For this reason, the cleaning of the head case 21 can be performed in a state where the suction port 15 is turned upside down without the cleaning operator turning off the power.

  However, when the floor surface detection member 71 is accidentally pushed by the hand holding the head case 21 while cleaning is performed in such a state, the electric motor 51 is energized and the transmission belt 61 is unexpectedly driven. In this case, the brushes and the like used for the care of the support portion 22b and the transmission belt 61 try to be conveyed by the transmission belt 61 as foreign matter, but the obstacle 65 prevents it from entering the interior of the motor housing chamber. The

  As described above, the obstacle 65 prevents foreign matters such as dust and brushes from entering the electric motor housing chamber with the care around the support portion 22b of the head case 21. Thereby, damage to the transmission belt 61 due to the biting of foreign matter between the drive wheel 52 and the transmission belt 61 is suppressed, and transmission failure due to the transmission belt 61 is unlikely to occur. In addition, even when the cleaning operator's fingertip is accidentally inserted into the opening 25 through which the transmission belt 61 passes during cleaning, in this state, the insertion depth of the fingertip is limited to be shallow by the obstacle 65. ing. For this reason, even if the transmission belt 61 is unexpectedly driven in the inserted state, the fingertip can be immediately extracted from the opening 25, and the safety at the time of misuse is high.

  Further, if the transmission belt 61 is unexpectedly driven while the head case 21 is being maintained as described above, the transmission belt 61 may come into contact with the obstacle 65. In this case, since the obstacle 65 is held so as not to move back and forth by the holding portion 22g, the obstacle 65 does not deviate from an appropriate position that obstructs the entry of foreign matter.

  In addition, the obstacle 65 can be elastically deformed. For this reason, when the transmission belt 61 is erroneously driven and comes into contact with the obstacle 65, the obstacle 65 is elastically deformed so as to escape from the transmission belt 61. Thereby, it is possible to easily remove the catch between the obstacle 65 and the teeth of the driven transmission belt 61. Therefore, the tooth of the driven transmission belt 61 continues to be overloaded and the teeth are scraped even though the opposing area of the obstacle 65 to the opening 25 is secured larger as described above. I can not.

  In addition, when the head case 21 has a bumper continuous over the front surface and both side surfaces of the case, the obstacle 65 can be integrally provided on the bumper. Further, the obstacle may not be elastically deformed. In this case, the obstacle 65 is preferably formed integrally with the lower case member 22. However, as described above, the configuration in which the obstacle 65 is provided integrally with the bumper simplifies the configuration of the mold for molding the lower case member 22, and the punching hole corresponding to the obstacle has a lower case. It is also preferable in that it is not formed on the lower surface of the member 22 or the like.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. One embodiment and its modifications are included in the scope of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner, 2 ... Vacuum cleaner main body, 4 ... Electric blower, 15 ... Suction inlet, 16 ... Suction head, 21 ... Head case, 22a, 22b ... Support part, 22g ... Holding part, 25 ... Opening part, 27 ... Cover, 32 ... Side cover, 41 ... Rotating cleaning body, 45 ... Drive wheel, 51 ... Electric motor, 52 ... Drive wheel, 61 ... Transmission belt, 61a ... Upper belt part, 61b ... Lower belt part, 65 ... Obstacle , 65a ... upper edge of the obstacle, 65b ... lower edge of the obstacle, S ... space

Claims (5)

A head case having a removable cover and having a support portion at each end;
The support portion is detachably supported and disposed in a space between the support portions, and has a driven wheel accommodated in one of the support portions at one end portion, and is attached and detached with the cover removed. Rotating cleaning body to be
An electric motor having a drive wheel disposed so as to face the driven wheel from the rear side, and housed in the head case behind the rotary cleaning body;
A transmission belt wound around the drive wheel and the driven wheel through an opening formed at the base of the one support portion;
An obstacle disposed between upper and lower belt portions extending between the driving wheel and the driven wheel of the transmission belt;
A suction port for a vacuum cleaner characterized by comprising:   The vacuum cleaner suction port according to claim 1, further comprising a bumper attached to the head case, wherein the obstacle is formed integrally with the bumper.   The upper and lower edges of the obstacle are approached to the belt portion, and a holding portion for engaging the obstacle and restraining the obstacle from moving back and forth is provided in the head case. The suction inlet for a vacuum cleaner according to claim 2.   4. The cover according to claim 1, wherein the cover covers the space from above and from the front to form a front portion of the head case and is detachable from above. 5. Suction mouth for vacuum cleaners. A suction port for a vacuum cleaner according to any one of claims 1 to 4,
A vacuum cleaner main body with an electric blower built into the suction mouth to spread the intake negative pressure,
The vacuum cleaner characterized by comprising.

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