JP2014030550A - Suction port body for cleaner and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body for a cleaner that can limit rotation of a suction head to a predetermined angle when the suction head is separated from a surface to be cleaned while permitting a change in direction of the suction head and is light in weight.SOLUTION: A suction port body incorporated with an electric motor 67 that drives a rotary cleaning body and is disposed in a suction head so as to be deviated toward one end side of the suction head in a width direction comprises head rotation control means. The head rotation control means has a regulation member 55, a spring 59 and a regulated portion 52 and permits rotation of the suction head exceeding a predetermined angle while temporarily fixing the rotation of the suction head at the predetermined angle. The regulation member 55 is attached to the suction head. The spring 59 biases the regulation member 55 in a direction in which an engagement portion 57 possessed by the regulation member 55 is brought into contact with a dust suction pipe 41. The regulated portion 52 is provided in a rotation pipe 51, pushes off the engagement portion 57 and can pass through between the engagement portion 57 and the dust suction pipe 41.

Description

  FIELD Embodiments described herein relate generally to a vacuum cleaner suction port having a suction head in which an electric motor and a rotary cleaning body are accommodated, and a vacuum cleaner including the suction port body.

  A suction head of the vacuum cleaner has a suction head rotatably connected to a front portion of a rotary tube having a connecting pipe connected to the rear portion thereof, and a rotary cleaning body and an electric motor that drives the suction head are incorporated in the suction head. Things are used a lot.

  During cleaning using an electric vacuum cleaner, the handle of the hand control unit communicated downstream is operated in the left or right direction based on the flow of dust-containing air flowing through the suction port body. As a result, the connection pipe of the suction port may be twisted. In this case, since the rotary tube and the suction head are relatively rotated, the direction of the suction head that is in contact with the surface to be cleaned is changed obliquely forward or laterally (hereinafter, such a change is referred to in this specification as (Referring to the direction change of the suction head).

  By the way, the rotary cleaning body included in the suction port body is disposed at the front portion of the suction head, and the electric motor is biased toward one end side in the width direction of the suction head. With such an arrangement of the electric motor, the suction head is heavier at one end in the width direction than at the other end. For this reason, when the suction port body is separated above the surface to be cleaned, the suction head rotates so that one end side in the width direction is lowered due to the unbalance of the weight.

  If the rotation of the suction head is large when it is separated from the surface to be cleaned, the next time the suction port is brought into contact with the surface to be cleaned, it is conscious to return the suction head that has been largely rotated to the original horizontal state. Since operation is required, it is inconvenient for cleaning.

  This problem can be solved, for example, by increasing the weight on the other end side in the width direction of the suction head and balancing the left and right weights of the suction head. However, this measure is inconvenient for cleaning because it requires a large amount of labor to move the suction port body as the weight of the entire suction port body increases, and is not a practical measure.

JP-A-6-217908

  The embodiment is capable of limiting the rotation of the suction head when separated from the surface to be cleaned to a predetermined angle while allowing the direction of the suction head to be changed, and a lightweight suction port for a vacuum cleaner, and the same It is providing the vacuum cleaner provided with.

  In order to solve the above-described problem, the embodiment includes an electric motor for driving the rotary cleaning body that is biased toward one end side in the width direction of the suction head and is built in the suction head, and the connection pipe is rotatably connected in the front-back direction. A suction port body in which the rotary tube is rotatably connected to a dust suction tube fixed to the suction head is provided with a head rotation control means. The head rotation control means includes a regulating member, a spring, and a regulated portion, and temporarily stops the rotation of the suction head at a predetermined angle and allows the rotation of the suction head exceeding the predetermined angle. Attach the regulating member to the suction head. The spring biases the regulating member in a direction in which the engaging portion of the regulating member is brought into contact with the dust suction pipe. The regulated portion is provided in the rotary tube, and the regulated portion is able to push away the engaging portion and pass between the engaging portion and the dust suction tube.

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 perspective view which shows the suction inlet body of FIG. 2 in the state from which the upper case member and cover were removed. FIG. 4 is a plan view around the dust suction tube indicated by F4 in FIG. 3. FIG. 5 is a perspective view around the dust suction tube shown in a section along the line FF in FIG. 4. It is a perspective view which decomposes | disassembles and shows the surroundings of the dust suction pipe of the suction inlet body of FIG. FIG. 5 is a cross-sectional view of the vicinity of the dust suction tube taken along line FF in FIG. 4 in a state where the suction head of the suction port body of FIG. 2 is in contact with the surface to be cleaned. FIG. 5 is a cross-sectional view showing the vicinity of the dust suction tube along the line FF in FIG. 4 in a state where the suction port body of FIG. 2 is separated from the surface to be cleaned and the suction head is temporarily fixed at a predetermined angle. FIG. 5 is a cross-sectional view of the vicinity of the dust suction pipe taken along line FF in FIG. 4 in a state where the suction port body of FIG. 2 is separated from the surface to be cleaned and the suction head is rotated beyond a predetermined angle. FIG. 5 is a cross-sectional view showing the vicinity of the dust suction tube along the line FF in FIG. 4 in a state where the suction head of the suction port body of FIG. FIG. 5 is a cross-sectional view of the vicinity of the dust suction tube taken along line FF in FIG. 4 in a state where the suction head of the suction port body of FIG. 2 is returned so as to contact the surface to be cleaned.

  Hereinafter, the vacuum cleaner and its suction port according to an 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 and 3, 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 41, a rotary pipe 51, a rotary cleaning body 61, an electric motor 67, a control circuit 71, a transmission belt 69, and the like.

  As shown in FIG. 2, the head case 21 includes a lower case member 22, an upper case member 29, a cover 31, left and right side bumpers 35, and the like.

  As shown in FIG. 3, the lower case member 22 is opened upward. At the same time, the lower case member 22 integrally includes support portions 22a and 22b at both ends in the longitudinal direction. The left and right support portions 22a and 22b protrude forward. These support portions 22a and 22b are both open upward, and one of them, for example, the inside of the support portion 22b communicates with the inside of the head case 21 covered with an upper case member 29 described later.

  The lower case member 22 has a rotary tube receiving portion 23 that is integrally projected rearward from the center portion in the longitudinal direction. The rotary tube receiving portion 23 has a front receiving plate 23a and a rear receiving plate 23b shown in FIG. The upper edges of the front and rear receiving plates 23a and 23b have an arc shape in the left-right direction and are open upward.

  As shown in FIGS. 5 and 6, the lower case member 22 integrally has a rotation-preventing rib 24 at the front end portion in the longitudinal center portion thereof. The rib 24 is disposed on the front side of the front receiving plate 23a and is erected upward. As shown in FIG. 6, the lower case member 22 integrally has two pivotal support portions 25 that are spaced apart from the side of the rib 24 at the front end portion of the central portion in the longitudinal direction. These pivotal support portions 25 are provided to be separated from each other in the front-rear direction, are erected upward, and have bearing grooves that open upward.

  Furthermore, as shown in FIG. 5, the lower case member 22 has a stopper portion 26, and the stopper portion 26 is formed by, for example, a rib provided over the front and rear pivot portions 25. Further, as shown in FIG. 5, the lower case member 22 integrally has an upward rod 27. The rod 27 is disposed between the front and rear pivot portions 25 so as not to face the bearing groove in the front-rear direction.

  Note that reference numeral 28 in FIG. 3 denotes a front fitting edge of the lower case member 22. The front fitting edge 28 is provided over the left and right support portions 22a and 22b, and has a groove that opens upward as shown in FIG. A concave portion 28a that opens upward is formed at the center in the longitudinal direction of the front fitting edge 28 as shown in FIG. A front receiving plate 23a is disposed behind the recess 28a.

  The upper case member 29 is opened downward. The upper case member 29 covers the lower case member 22 from above except for the support portions 22a and 22b and the rotary tube receiving portion 23, and is connected to the lower case member 22 by screwing or the like in a state where the edges are joined to each other. ing. The upper case member 29 integrally has a rotation-preventing rib (not shown) protruding downward at the center in the longitudinal direction. This rib is paired with the rib 24.

  Further, the upper case member 29 has a front fitting edge (not shown) on which a protrusion is formed. The front fitting edge 28 of the upper case member 29 and the front fitting edge of the lower case member 22 are joined by fitting the protrusion of the upper case member 29 and the groove of the lower case member 22. A recess (not shown) that opens downward is formed on the front fitting edge of the upper case member 29, and this recess forms an opening (not shown) that is continuous with the recess 28 a of the lower case member 22. It is like that.

  As shown in FIG. 2, the cover 31 includes a cover main body 32, a front bumper 33, and a pair of locking members 34.

  The cover body 32 is formed in a size that covers the support portions 22a and 22b from above at both ends in the longitudinal direction. The front bumper 33 is attached so as to cover the front edge portion of the cover main body 32. The front bumper 33 is formed of a resin member that is softer than the hard synthetic resin that forms the cover body 32. The locking members 34 are attached to the rear edge portion of the cover main body 32 and both left and right end portions so as to be slidable in the left-right direction by an artificial operation.

  The cover 31 is attached to the head case 21 so as to cover the space between the support portions 22 a and 22 b from above and from the front to form the front portion of the head case 21. At the same time, both end portions of the cover 31 cover the support portions 22a and 22b from above. By attaching the cover 31, a horizontally long dust suction opening (not shown) corresponding to the space is formed on the lower surface of the front portion of the suction head 16.

  The cover 31 can be attached to and detached from the head case 21 from above. The cover 31 is attached to the front portion of the head case 21 from above by sliding the locking members 34 toward each other and engaging with a cover holding portion (not shown) formed on the upper case member 29. Yes. When the cover 31 is attached to the head case 21 and the locking member 34 of the cover 31 is slid away from each other, the engagement between the locking member 34 and the cover holding portion is released. Therefore, the cover 31 can be removed upward from the head case 21 by lifting the cover 31 thereafter.

  The side bumper 35 is disposed so as to cover the front and side surfaces of both end portions in the width direction of the head case 21. These side bumpers 35 are formed of a synthetic resin softer than the hard synthetic resin forming the lower case member 22, the upper case member 29, and the cover body 32, for example, polypropylene.

  The rear part of the side bumper 35 is sandwiched vertically by the lower case member 22 and the upper case member 29 so as not to come off between them. Parts other than the rear part of the side bumper 35 are vertically sandwiched between the support part 22 a or 22 b of the lower case member 22 and one longitudinal end part of the upper case member 29. The upper case member 29 can be brought into contact with and separated from the side bumper 35 from above.

  As shown in FIGS. 4 to 6 and the like, the dust suction tube 41 has a trumpet shape that gradually increases in diameter from the rear end toward the front end, and an annular flange 42, an overhang portion 43, and an upper engagement on the outer periphery thereof. The groove 44, the lower engaging groove 45, and the holder portion 46 are integrally provided.

  The flange 42 is formed to project outward from the front end of the dust suction tube 41. The overhanging portion 43 protrudes from the outer periphery of the rear portion of the dust suction tube 41. As shown in FIGS. 5 and 7, etc., the overhanging portion 43 has a length exceeding 180 ° and extends along the circumferential direction of the dust suction tube 41, and has an arc-shaped hole 43a extending substantially 180 °. .

  The upper engagement groove 44 and the lower engagement groove 45 are provided between the flange 42 and the overhanging portion 43 and extend in the front-rear direction. The upper engagement groove 44 and the lower engagement groove 45 are formed between a pair of ribs that protrude from the outer periphery of the dust suction tube 41 so as to extend in the axial direction of the dust suction tube 41.

  As shown in FIGS. 4 and 6, the holder portion 46 is provided between the flange 42 and the overhang portion 43. The holder portion 46 is formed of two front and rear side plates that protrude from the dust suction tube 41 and a lower end plate that integrally connects only the lower portions of the front ends of these side plates. For this reason, both the upper and lower ends of the holder part 46 are opened, and the holder part 46 has a clearance groove 46a for preventing interference with the lower end plate at the bottom at the tip.

  As shown in FIG. 3, the dust suction tube 41 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 29 so as not to rotate. As shown in FIG. 5, rotation prevention of the dust suction pipe 41 with respect to the head case 21 is performed by fitting the lower engagement groove 45 and the rib 24 of the lower case member 22 and the upper engagement groove 44 and the upper case member 29 not shown. This is done by fitting with ribs. Further, the dust suction tube 41 is also prevented from rotating by fitting the recess 42 a of the lower case member 22 and the recess (not shown) of the upper case member 29 with the flange 42.

  Thus, the front end of the dust suction tube 41 fixed to the head case 21 is opened facing the space. The rear end portion of the dust suction tube 41 protrudes behind the upper case member 29. Further, in a state where the dust suction tube 41 is attached to the head case 21, the holder portion 46 of the dust suction tube 41 is disposed corresponding to the pivot portion 25. As a specific example, it is disposed so as to protrude to the side of the dust suction pipe 41, to be spaced above the pivot support portion 25, and to face the pivot support portion 25. At the same time, in a state in which the dust suction tube 41 is attached to the head case 21, the hole 43a of the dust suction tube 41 is provided so that one end thereof is at the top and the other end is at the bottom. .

  The rotary tube 51 is rotatably connected to the rear end portion of the dust suction tube 41 from the outside. The rotary tube 51 and the dust suction tube 41 are in communication with each other. The lower portion of the rotating tube 51 is supported by the rotating tube receiving plates 23a and 23b, and the rotating tube 51 can rotate around the central axis extending in the front-rear direction along the arc surfaces of the rotating tube receiving plates 23a and 23b. is there. As shown in FIG. 5, the front end of the rotary tube 51 is covered with a protruding portion 43 of the dust suction tube 41 in a state where the rotary tube 51 is connected to the dust suction tube 41.

  As shown in FIG. 6 and the like, the rotary tube 51 has a single restricted portion 52 that protrudes forward from the front end of the peripheral portion. The regulated portion 52 is formed of a root portion 52a and an engagement rod 52b made of a round bar. The root portion 52 a is formed integrally with the rotary tube 51. The engagement rod 52b is preferably made of metal and is provided with one end portion embedded in the root portion 52a. Note that the engagement rod 52b can be made of a resin integral with the root portion 52a. The engagement rod 52 b is parallel to the central axis of the rotary tube 51 and protrudes forward from the root portion 52 a of the rotary tube 51.

  In a state where the rotary tube 51 is connected to the dust suction tube 41, the regulated portion 52 is inserted through the hole 43 a of the overhang portion 43 as shown in FIG. At the same time, the root portion 52a of the restricted portion 52 is fitted into the hole 43a, and the root portion 52a is guided by the hole 43a when the rotary tube 51 is rotated with respect to the dust suction tube 41. ing.

  The regulated portion 52 forms a head rotation control means together with a regulating member 55 and a spring 59 described below.

  As shown in FIGS. 5 and 6, the restricting member 55 is formed in a lever shape, and includes a pivot 56, an engaging portion 57, and a spring receiving portion 58.

  The pivot 56 protrudes from the front and rear surfaces of the regulating member 55 at one end of the regulating member 55. The engaging portion 57 is provided so as to form, for example, the other end portion of the regulating member 55 and protrude toward the dust suction tube 41. The width of the engaging portion 57 is the largest among the widths of the respective portions of the regulating member 55. Thereby, the site | part ranging from the one end part of the limitation member 55 to the engaging part 57 is formed in the side view inverted L shape. The spring receiving portion 58 is provided, for example, between the pivot 56 and the engaging portion 57 so as to protrude on the side opposite to the protruding direction of the engaging portion 57. The spring receiving portion 58 is formed with a fitting convex portion (not shown) that protrudes downward, for example.

  Further, as shown in FIGS. 5 and 7, etc., a double-action allowable portion 55a and a braking portion 55b , Has a boundary portion 55c.

  The double-action allowable portion 55a is formed as a surface that forms a straight side surface of the engaging portion 57, that is, a flat surface. The braking portion 55b is formed with a curved surface. The surface roughness of this curved surface can be made rougher than the plane forming the double-action allowable portion 55a. The boundary part 55c forms a boundary between the double-action allowable part 55a and the braking part 55b, and is formed continuously to the double-action allowable part 55a and the braking part 55b. In one embodiment, the boundary portion 55c is provided, for example, at the corner of the engaging portion 57, but may have a certain length.

  The restricting member 55 is disposed through the holder portion 46 in the vertical direction with the side surface opposite to the side surface from which the spring receiving portion 58 is projected facing the outer periphery of the dust suction tube 41. At the same time, the restricting member 55 is fitted with the pivot 56 on the bearing groove of the front / rear pivot portion 25 formed on the lower case member 22 of the head case 21 from above, and is rotatably attached to the pivot portion 25 as a fulcrum. It has been. The front and rear surfaces of the restricting member 55 are preferably in slight contact with the front and rear side plates of the holder portion 46, thereby preventing the restricting member 55 from moving in the front-rear direction.

  The restricting member 55 has a stopper end portion 55 d formed between one end thereof and the pivot 56, and the stopper end portion 55 d is in contact with the stopper portion 26 of the lower case member 22. Thereby, the regulating member 55 is positioned. In this case, the restriction member 55 is held so that the rotation of the restriction member 55 in the counterclockwise direction in FIG. 55 is positioned. The restriction member 55 can be positioned by the stopper portion 26 so that the boundary portion 55c of the engaging portion 57 contacts the outer periphery of the dust suction tube 41, and the boundary portion 55c and the dust suction tube 41 are connected by the spring 59. When configured to contact, the stopper end 55d and the stopper 26 can be omitted.

  The boundary portion 55c of the engaging portion 57 of the restricting member 55 arranged in this way is close to the outer periphery of the dust suction tube 41 as described above. At the same time, as shown in FIGS. 7 to 11, the engaging portion 57 is arranged so as to cross the hole 43 a of the protruding portion 43 when the suction port body 15 is viewed from the front to the rear. In other words, a state in which the double-action allowable portion 55a and the braking portion 55b intersect with the movement locus of the restricted portion 52 accompanying the rotation of the rotary tube 51, in short, the double-action allowable portion 55a and the braking portion 55b are arcuate. A regulating member 55 is disposed so as to cross the hole 43a.

  For example, a coil spring is used as the spring 59. One end of the spring 59 is disposed between the front and rear pivot portions 25, and the other end of the spring 59 is supported by the spring receiving portion 58 of the regulating member 55. In this case, the rod 27 is accommodated in one end portion of the spring 59, and a fitting convex portion (not shown) of the spring receiving portion 58 is fitted in the other end portion of the spring 59. Thus, the spring 59 is held so as not to be inadvertently detached.

  The spring 59 disposed as described above is held in a compressed state and is in a state where further compression is possible. For this reason, the spring 59 biases the regulating member 55 in a direction in which the engaging portion 57 of the regulating member 55 is brought into contact with the outer periphery of the dust suction tube 41.

  As shown in FIG. 3, the rotary cleaning body 61 includes bearings 62 and 63 at both left and right ends, and a cleaning body assembly 64 that is rotatably supported by the bearings 62 and 63. For example, one bearing 63 arranged on the right side in FIG. 3 has a driven wheel 65 made of a toothed wheel. The cleaning body assembly 64 is formed, for example, by attaching a cleaning member to a rotating shaft whose both ends are supported by bearings 62 and 63. The cleaning member shown in FIG. 3 is a cleaning blade made of a soft material such as rubber, but may be brush hairs, or both the cleaning blade and the brush may be attached to the rotating shaft 64a.

  The rotary cleaning body 61 is disposed in a space between the support portions 22a and 22b, with the bearings 62 and 63 at both ends thereof removably supported by the support portions 22a and 22b of the head case 21. The front end opening of the dust suction tube 41 is opposed to the central portion in the longitudinal direction of the cleaning assembly 64 disposed in this space from the rear side.

  As shown in FIG. 3, the electric motor 67 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 41. In other words, the electric motor 67 is disposed so as to be biased toward one end in the width direction of the suction head 16.

  The electric motor 67 has a drive wheel 68 formed of a toothed vehicle attached to the output shaft 67a. The drive wheel 68 is paired with the driven wheel 65 of the rotary cleaning body 61 and is disposed so as to face the driven wheel 65 from the rear side.

  The transmission belt 69 is an endless annular belt having a tooth (not shown) formed on the inner surface thereof. The transmission belt 69 is wound around the driving wheel 68 and the driven wheel 65.

  When cleaning is performed using the electric vacuum cleaner 1, the driving force of the electric motor 67 is applied to the driven wheel 65 via the transmission belt 69, and the rotary cleaning body 61 is rotated. Thereby, the rotary cleaning body 61 can scrape the dust on the surface to be cleaned by the cleaning member.

  A control circuit 71 shown in FIG. 3 is used to control the operation of the electric motor 67. The control circuit 71 is formed by mounting necessary circuit components on the circuit board, and is built in the head case 21 at a position opposite to the electric motor 67 with the dust suction pipe 41 as a boundary. The control circuit 71 and the electric motor 67 are electrically connected via an electric wiring (not shown).

  The control circuit 71 is lighter than the electric motor 67. For this reason, the weight balance of the suction port body 15 is such that the one end side in the width direction of the suction port body 15 where the electric motor 67 is disposed with the dust suction tube 41 as a boundary is heavy, and the control circuit 71 is disposed with the dust suction tube 41 as a boundary. The other end side in the width direction of the suction port body 15 is lighter.

  The front end portion (front end portion) of the connection pipe 17 is connected to a rear end portion of the rotary pipe 51 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 51 form a so-called universal joint, and the connection pipe 17 can rotate in the front-rear direction with respect to the rotary pipe 51. The connecting pipe 17 and the rotating pipe 51 thus connected are in communication with each other. Accordingly, the dust-containing air sucked into the dust suction pipe 41 during cleaning is guided from the rotary pipe 51 through the connection pipe 17 to the extension pipe 11.

  2 and 3, reference numeral 72 indicates a pair of power supply pins that are electrically connected to the control circuit 71 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 67.

  There is a dead space between the dust suction pipe 41 and the electric motor 67. In this space, the regulating member 55 and the spring 59 of the head rotation control means, the pivotal support 25 for supporting them, the holder 46, etc. Is arranged. For this reason, the suction head 16 does not increase in size in the width direction with the provision of the head rotation control means, and the weight does not increase greatly. At the same time, the rear portion of the upper case member 29 does not have to be inflated to cover the head rotation control means as compared with the case where the head rotation control means is disposed on the side of the rotary tube 51. The plan view shape does not become large and does not become heavy.

  Note that a dead space DS (see FIG. 4) also exists between the dust suction pipe 41 and the control circuit 71. For this reason, it is also possible to arrange the regulating member 55 and the spring 59 of the head rotation control means, the pivotal support portion 25 and the holder portion 46 for supporting them in the dead space DS.

  FIG. 7 shows the relationship between the dust suction pipe 41 and the head rotation control means when the suction port 15 is placed on the surface to be cleaned and the direction of the suction head 16 is not changed during cleaning.

  In this standard state, the boundary portion 55 c of the engaging portion 57 that the restricting member 55 has by the urging force of the spring 59 is brought close to the outer periphery of the dust suction tube 41. As a result, a first gap gradually narrowing toward the boundary portion 55c is formed between the double-action allowable portion 55a of the restriction member 55 and the outer periphery of the dust suction tube 41, and the braking portion 55b of the restriction member 55 and the dust suction portion. A second gap that gradually narrows toward the boundary portion 55 c is formed between the outer periphery of the tube 41.

  At the same time, in the standard state, the regulated portion 52 of the rotary tube 51 passes through the central position in the longitudinal direction of the arc-shaped hole 43a. As a result, the engaging rod 52b is disposed in the second gap and is in contact with the braking portion 55b of the regulating member 55.

  When the suction port body 15 is separated above the surface to be cleaned from the state of FIG. 7, the suction head 16 has the dust suction tube so that the one end side in which the electric motor 67 is built is lowered due to the unbalance of the weight of the suction port body 15. 41 and the rotary tube 51 rotate relatively.

  Along with this, the engaging rod 52b of the regulated portion 52 starts to push away the engaging portion 57 by rotating the regulating member 55 against the biasing force of the spring 59 while receiving resistance at the braking portion 55b. Therefore, as shown in FIG. 8, the restricting member 55 starts to rotate about the pivot 56 in the clockwise direction in FIG. 8, and the boundary portion 55 c of the engaging portion 57 is moved away from the outer periphery of the dust suction tube 41.

  With this behavior, the spring 59 is compressed, so that the force for biasing the restricting member 55 increases. This force is applied to the engaging rod 52b of the restricted portion 52 and the suction head 16 as a braking force (load) against the relative rotation between the rotary tube 51 and the dust suction tube 41. In addition, in this case, since the braking portion 55b is formed with an arcuate curved surface, the engaging rod 52b comes into contact with the braking portion 55b. Thereby, a larger braking force can be applied.

  As described above, as the suction head 16 is rotated clockwise from the horizontal state, the engaging rod 52b gradually comes into strong contact with the braking portion 55b. For this reason, the braking force (load) based on the spring 59 is gradually strengthened and applied to the suction head 16 rotating clockwise in FIG. 8, so that the rotational momentum of the suction head 16 can be reduced.

  That is, the braking force (load) with respect to the rotation of the rotary tube 51 is given by the head rotation restricting means, and the suction head 16 can be temporarily stopped at a predetermined angle. Here, the predetermined angle is an angle when the suction head 16 is rotated until the engaging rod 52b in contact with the braking portion 55b reaches the boundary portion 44c as shown in FIG. 8 from the state shown in FIG. Is shown.

  By such temporary fixing, the suction head 16 that has been lifted is further prevented from rotating. When the suction head 16 is brought into contact with the surface to be cleaned in this temporarily fixed state, the suction port body 15 is naturally returned to the state shown in FIG. 7 accordingly, and an operation for intentionally returning the suction head 16 is required. No, you can continue cleaning.

  Further, during cleaning, the handle 8 of the dust suction hose 7 is twisted in the direction of arrow A in FIG. 1 by the cleaning operator, and the suction head 16 that is in contact with the surface to be cleaned has its one end 16a on the rear side of the other end 16b. When the direction is changed so as to be positioned, it is the same that the dust suction pipe 41 and the head rotation control means go through the state of FIG. 8 from the state of FIG. 7 in the first stage.

  However, since a twisting force is applied to the connecting pipe 17, an external force that further rotates the suction head 16 clockwise in the state of FIG. 8 is relatively applied. For this reason, the circumferential positions of the regulated portion 52 of the rotary tube 51, the dust suction tube 41, and the regulating member 55 change relatively.

  As a result, as a result, the engaging rod 52b of the restricted portion 52 pushes the engaging portion 57 of the restricting member 55 away from the outer periphery of the dust suction tube 41 against the biasing force of the spring 59. It passes between the boundary portion 55 c of the engaging portion 57 and the outer periphery of the dust suction tube 41. The state after the passage is shown in FIG. Therefore, the rotation of the rotary tube 51 after this point is lightly performed without receiving a load from the head rotation control means.

  This behavior is the same when an external force that further rotates the suction head 16 in FIG. 8 is applied in addition to when the direction of the suction head 16 is changed. For this reason, the head rotation control means is not overloaded, and the direction of the suction head 16 can be changed to a desired direction by the twisting operation.

  Next, as shown in FIG. 9, when the suction head 16 tilted is brought into contact with the surface to be cleaned and the suction head 16 is returned to the horizontal position, or when the suction head 16 is in contact with the surface to be cleaned, a hand operation is performed. The behavior when twisting in the direction opposite to the arrow A and returning the rotary tube 51 will be described.

  That is, as the rotary tube 51 is relatively rotated clockwise from the state of FIG. 9 (therefore, the suction head 16 is relatively rotated counterclockwise), the engaging rod 52b of the restricted portion 52 is It enters the first gap between the outer periphery of the dust suction pipe 41 and the double-action allowable portion 55a of the restricting member 55, and comes into contact with the double-action allowable portion 55a as shown in FIG.

  Thus, the engaging rod 52b that has entered the first gap moves the engaging portion 57 of the restricting member 55 away from the outer periphery of the dust suction tube 41 against the urging force of the spring 59 while receiving resistance at the double-action allowable portion 55a. Push away. Thereby, the engagement rod 42b passes between the boundary portion 55c of the restricting member 55 and the outer periphery of the dust suction tube 41 and enters the second gap.

  In this case, since the double-action allowable portion 55a is a flat surface, the engagement rod 52b is not caught by this portion. In addition, since the double-action allowable portion 55a is located farther than the braking portion 55b with respect to the pivot 56 of the restricting member 55, the moment for rotating the restricting member 55 is small. Therefore, the engaging rod 52b can slightly push away the engaging portion 57 of the restricting member 55 biased by the spring 59 and pass between the boundary portion 55c and the outer periphery of the dust suction tube 41. Accordingly, the braking force (load) against the rotation by the head rotation restricting means at this time is smaller than the braking force applied to the suction head 16 when temporarily rotating the suction head 16 at a predetermined angle.

  With the above operation, the suction head 16 is returned to the horizontal position, and the rotary pipe 51 and the connection pipe 17 are returned to be suitable for cleaning in a standard state. This state is shown in FIG. This state is the same as the state shown in FIG.

  According to the suction port body 15 having the configuration described above, the rotation of the suction head 16 when the suction port body 15 is separated from the surface to be cleaned is limited to a predetermined angle while allowing the direction of the suction head 16 to be changed. It is possible to stop. Moreover, since such a restriction is given by the head rotation control means having the spring 59, it is necessary to provide a weight for balancing the left and right weights of the suction head 16 on the side opposite to the electric motor 67 with the dust suction pipe 41 as a boundary. There is no. For this reason, the suction port body 15 is suppressed from becoming heavy and can be configured to be lightweight, whereby the operability for moving the suction port body 15 is not deteriorated.

  Further, as described above, when the suction head 16 is rotated to be inclined, a braking force against this rotation can be applied to the suction head 16 by the head rotation restricting means. The rotation load applied to the rotary pipe 51 of the suction head 16 by the head rotation restricting means is rotated so that the suction head 16 is inclined when the suction head 16 is rotated to be horizontal. Smaller than when.

  As a result, when the suction port 15 is separated upward from the surface to be cleaned, a large load is applied to the rotation of the suction head 16 around the rotary tube 51, and the rotation of the suction head 16 can be braked. Therefore, the rotation of the suction head 16 is restrained from being vigorous, and the performance of temporarily fixing the rotation angle of the suction head 16 to a predetermined angle is high.

  At the same time, the rotation load is small when the rotation of the suction head 16 proceeds beyond the predetermined angle, and when the suction head 16 is rotated back in the reverse direction and then returned to the horizontal position. Thereby, the suction head 16 can be smoothly returned to a horizontal state. For the same reason, an operation of rotating the rotary tube 51 relative to the suction head 16 in contact with the surface to be cleaned so that the rear end of the connection tube 17 is obliquely upward and rearward is performed. It is possible to carry out smoothly.

  In order to exert such a function, the engaging portion 57 of the restricting member 55 is positioned so that the suction head 16 is horizontal with the braking portion 55b with which the restricted portion 52 contacts when the suction head 16 is rotated so as to tilt. A double-action allowable portion 55a with which the restricted portion 52 contacts when rotated, and a boundary portion 55c that forms a boundary between the braking portion 55b and the double-action allowable portion 55a and is continuous therewith.

  In this way, the engagement portion 57 is provided with the double-action allowable portion 55a, the braking portion 55b, and the boundary portion 55c so that the above functions can be exhibited, so that the configuration is simple.

  Further, according to the suction port body 15 having the above-described configuration, the double-action allowable portion 55a is formed by a plane that forms a first gap that gradually narrows toward the boundary portion 55c with the outer periphery of the dust suction tube 41, The braking portion 55b is formed by a curved surface that forms a second gap that gradually narrows toward the boundary portion 55c with the outer periphery of the dust suction tube 41.

  By providing the cam surface (that is, the multilayer allowable portion 55a, the brake portion 55b, and the boundary portion 55c) on the engaging portion 57 of the restricting member 55 that can be rotated in this manner, the above function is exhibited. Therefore, the configuration of the regulating member 55 for exerting the function is simpler.

  According to the suction port body 15 having the above-described configuration, the restricting member 55 has a lever shape in which one end is pivotally supported by the suction head 16 and the engaging portion 57 is provided at the other end. A double-action allowable portion 55a, a braking portion 55b, and a boundary portion 55c are formed on the surface facing the dust suction pipe 41.

  As a result, the engagement rod 52b of the restricted portion 52 contacts the double-action allowable portion 55a while the boundary portion 55c is in contact with the double-action allowable portion 55a according to the distance difference between the double-action allowable portion 55a and the braking portion 55b with respect to the pivot portion of the suction head 16. On the other hand, the load at the time of passing can be reduced, and the load at the time of passing through the boundary part 55c while being in contact with the braking part 55b can be increased.

  Further, according to the suction port body 15 having the above-described configuration, the regulated portion 52 is formed by the root portion 52 a and the engagement rod 52 b protruding from the root portion 52 a to the front of the rotary tube 51, and the dust suction tube 41. A protruding portion 43 that covers the front end of the rotary tube 51 is provided on the outer periphery, and the protruding portion 43 has an arcuate hole 43a that guides the root portion 52a.

  As a result, while the regulated portion 52 is supported by the protruding portion 54 of the dust suction tube 41, the dust suction tube 41 and the rotary tube 51 included in the suction head 16 are relatively rotated, and the engagement rod 52b is moved to the dust suction tube 41. Between the outer periphery and the engaging portion 57 of the restricting member 55. Thereby, it is possible to reliably exhibit the function as the operation is stabilized.

  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, 17 ... Connection pipe, 21 ... Head case, 25 ... Pivot part, 41 ... Dust suction pipe, 43 ... Overhanging part, 43a ... hole, 46 ... holder part, 51 ... rotating tube, 52 ... regulated part, 52a ... root part, 52b ... engagement rod, 55 ... regulating member, 55a ... double-acting allowable part, 55b ... braking part , 55c ... boundary part, 56 ... pivot, 57 ... engagement part, 58 ... spring receiving part, 59 ... spring, 61 ... rotary cleaning body, 67 ... electric motor

Claims (7)

A rotary cleaning body is built in the suction head, and an electric motor that drives the rotary cleaning body is biased and built in one end in the width direction of the suction head, and the rotary pipe is rotated behind the dust suction pipe fixed to the suction head. In the suction port body for the vacuum cleaner, which is connected to the rear portion of the rotary tube so that the connection tube is rotatably connected in the front-rear direction,
A head rotation control means for temporarily stopping rotation of the suction head at a predetermined angle and allowing rotation of the suction head exceeding the predetermined angle;
The head rotation control means has an engagement portion and is attached to the suction head, a spring that biases the restriction member in a direction in which the engagement portion is brought into contact with the dust suction pipe, and the rotation A suction port body for a vacuum cleaner, comprising: a regulated portion that is provided on a pipe and is capable of passing between the engagement portion and the dust suction tube by pushing away the engagement portion.   The rotation load of the suction head with respect to the rotary tube given by the head rotation restricting means is rotated when the suction head is rotated so that the suction head is tilted. The suction port body for a vacuum cleaner according to claim 1, wherein the suction port body is also small.   A double-acting portion where the restricted portion contacts when the engaging portion is rotated so that the suction head is tilted, and a braking portion where the restricted portion is in contact with the engaging portion, and when the suction head is rotated horizontally The suction port body for a vacuum cleaner according to claim 2, further comprising a permissible portion, and a boundary portion that is continuous with the braking portion and the double-acting permissible portion.   The double-action allowable portion is formed by a plane that forms a first gap that gradually narrows toward the boundary portion, and the outer periphery of the dust suction tube, and the braking portion gradually narrows toward the boundary portion. The suction port for a vacuum cleaner according to claim 3, wherein the second gap is formed by a curved surface formed between the second gap and the outer periphery of the dust suction pipe.   The restricting member has a lever shape in which one end portion is pivotally supported by the suction head and the engaging portion is provided at the other end portion, and the double-action allowable portion is provided on a surface of the restricting member facing the dust suction pipe. The suction port for a vacuum cleaner according to claim 4, wherein the braking part and the boundary part are formed.   The regulated portion is formed of a root portion and an engaging rod protruding from the root portion, and a protruding portion that covers the front end of the rotary tube is provided on the outer periphery of the dust suction tube, and the protruding portion is the root portion. The vacuum cleaner suction port according to any one of claims 1 to 5, further comprising an arcuate hole that guides the portion. A suction port for a vacuum cleaner according to any one of claims 1 to 6,
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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