JP5241458B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner.

  In the conventional suction body, dust and dust are scraped and sucked from the surface to be cleaned by a rotary cleaning body provided with a cleaning member such as a brush or a blade.

  The cleaning member of the rotary cleaning body is easily entangled with fibrous materials such as lint and hair, etc. It becomes like this.

  In order to remove this, scissors and cutters were taken out and the entangled dust was cut and removed.

  In this case, as a structure for removing the rotary cleaning body from the mouthpiece, for example, a structure as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2000-83874) has been proposed. In Patent Document 1, a cover that covers the upper and lower case main bodies and an upper part of the upper case is provided, a cover side locking portion is provided at an edge of the cover, and the locked portion is slid to the cover side locking portion. A slide locking member that engages and disengages is provided in the mouthpiece main body case.

  Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-16605) proposes a mouthpiece having a lock member on the lower surface side of the mouthpiece for holding the bearing pressing member detachably on the mouthpiece body. .

  Further, as a configuration for attaching and detaching the rotary cleaning body, a technique such as Patent Document 3 (Japanese Patent No. 3249188) has been proposed, regardless of the connecting mechanism portion that connects the rotary cleaning body and the drive source from the electric motor. ing. In Patent Document 3, an engagement portion that is detachably engaged with the bearing body is provided, and a fitting hole in which the other is inserted and engaged is formed in one of the engagement portions of the bearing body and the rotary cleaning body. ing.

JP 2000-83874 A JP 2004-16605 A Japanese Patent No. 3249188

  When attaching / detaching the cover by the above conventional sliding method, when the slide locking member slides on the case, it becomes heavy or hard when engaged / disengaged due to fine sand or dust entering from the gap of the case. As a result, there was a problem that the movement became astringent. As a result, there was a burden such as finger pain.

  Also, when the cover is attached / detached, the slide locking member is moved. However, it may be difficult to know which position the locking member moves to engage / disengage. There are times when it operates many times.

  In the mouthpiece provided with the lock member according to the prior art, a groove is provided in the lock member so that the bearing pressing member is detachably held on the mouthpiece body, and is rotated by a coin or the like. Therefore, if you want to remove the rotating cleaning body, you will always need coins and similar tools, and it will take time and effort to find and take it out.

  Also, if the coin matches the groove shape, the lock member can be easily rotated. However, if the size and thickness are different, the lock member is easily removed from the groove, and the lock member is difficult to rotate, and the groove is further polished. There is a worry.

  A taper hole is formed in the center of the pulley, and a truncated cone-shaped engaging portion formed at one end of the rotary cleaning body is detachably supported in the taper hole. However, if the tapered hole and the frustoconical engaging portion are not in close contact with each other, there has been a problem that the driving force cannot be sufficiently transmitted due to eccentricity of the rotary cleaning body.

The present invention, the engagement portion of the main shaft joint and the driven joint, and the respective outermost portions of the driving shaft joint and the driven joint.

The engaging part of the driven shaft coupling was provided outside the outer periphery of the rotary cleaning body.

Preferably, the engaging portion of the main shaft joint has concave and convex teeth, the engaging portion of the driven shaft joint has concave and convex teeth that engage with the main shaft coupling , and the main shaft coupling teeth and the driven shaft The intersection of the extension lines of the surface that meshes with the joint teeth is arranged on the outer peripheral side of the central axis of the main shaft joint.

According to the present invention, since the engaged state is easily visually confirmed, it can be easily attached and detached, and dust attached to the engaging portion can be easily found and cleaned.

Moreover, even if the axial length of the engaging portion is short, the engagement height of the engaging portion can be ensured, and the axial length of the rotary cleaning body can be used effectively.

Moreover, since the force pushed to the outside acts on the teeth of the driven shaft joint at all the meshing locations, they cancel each other and stabilize when the rotations of the main shaft joint and the driven shaft joint are coaxial. Thereby, generation | occurrence | production of the noise by the shake at the time of rotation of a rotary cleaning body is suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9.

  FIG. 1 shows an exploded perspective view of a mouthpiece according to the present embodiment. In FIG. 1, 101 is a lower case, 100 is an upper case disposed above the lower case, 104 is a rotary cleaning body covered with the upper case 100 and the lower case 101, and 105 is for driving the rotary cleaning body 104. An electric motor, 107 is a safety switch for automatically stopping rotation when the suction body is lifted, 108 is a pulley on the motor side, 109 is a large pulley constituting a reduction pulley, 110 is a small pulley constituting a reduction pulley, 111 is This is a shaft for connecting the large pulley 109 and the small pulley 110.

  A transmission mechanism is configured to transmit the driving force generated by the electric motor 105 to the rotary shaft end portion of the rotary cleaning body 104 via the shaft 111 connecting the large pulley 109 and the small pulley 110.

  Reference numeral 120 denotes a locking member for opening and closing a bearing pressing member (not shown) located on the lower surface side of the lower case 101. The support portion protruding from the upper case 100 and the lower case 101 serves as a rotation shaft, and is assembled. It supports in the up-down direction and restricts the locking member 120 from coming off.

  Reference numeral 102 denotes a first connection pipe that is rotatable in the vertical direction with respect to the suction body, among the universal joints in which an air passage that connects the inside of the mouthpiece body and the outside (the vacuum cleaner body) is formed. 103 is a universal joint. The second connecting pipe is rotatable in the left-right direction with respect to the first connecting pipe.

  In FIG. 1, the direction along the rotation axis of the rotary cleaning body 104 is referred to as the left-right direction of the mouthpiece, and this left-right direction coincides with the longitudinal direction of the normal mouthpiece. Regarding the up-and-down direction of the mouthpiece, the side on which the opening 118 is formed is referred to as the lower surface side and the opposite side is referred to as the upper surface side in a state where the mouthpiece is placed on a horizontal floor surface. Further, the description will be made assuming that the advancing direction side of the suction port is the front side and the backward direction side is the back side.

  The external view of the vacuum cleaner by a present Example is shown in FIG. 201 has a built-in electric blower (not shown) that generates the intake air necessary for collecting the mouthpiece body at the rear, and a dust collection chamber (not shown) that collects dust at the front. The vacuum cleaner main body 202 is connected to the vacuum cleaner main body 201 and hose body is formed so as to be flexibly movable. 203 is connected to the hose body 202 to connect the vacuum cleaner main body 201 and the suction body 206. The handle grip includes a hand switch 204 to be controlled and has a flow path (not shown) communicating with the hose body 202 and the extension pipe 205. In addition, the hose body 202, the handle grip 203, and the extension pipe 205 have a built-in power supply line (not shown) for supplying electricity to the suction body 206.

  FIG. 3 shows a plan view (bottom view) when the mouthpiece body according to this embodiment is viewed from below. Reference numeral 118 denotes a floor surface opening provided in the mouthpiece lower case 101 and faces the surface to be cleaned. 301 is a bumper, 300 is a fixed brush, and 303 is a rear wheel. 107 is a safety switch for automatically stopping when the mouthpiece is lifted, and 107a is a floor surface detection wheel for detecting whether it is installed on the surface to be cleaned.

  Reference numeral 315 denotes a bearing unit, which has a built-in bearing, and a pulley 316 that transmits a driving force from the motor 105 is arranged on the outer periphery thereof. A bearing is arranged on both sides of the pulley 316, and is supported in the suction body. ing. Reference numeral 317 denotes a main shaft coupling portion that rotates integrally with the pulley 316 and transmits the rotational force of the electric motor.

  One end of the rotary cleaning body 104 has a driven shaft coupling portion 318 that engages with the main shaft coupling portion 317, and the other end side has a bearing portion 319 that is removably supported by the shaft support portion of the suction body. doing. The main shaft joint portion 317 and the driven shaft joint portion 318 are engaged with each other by forming concave and convex teeth 317a and 318a on the outermost periphery and meshing them. Reference numeral 305 denotes a unit pressing member that covers the bearing unit portion 315.

  The cleaning members 307 and 308 of the rotary cleaning body 104 can be configured using soft blades in addition to brushes made of fibers or the like. The brushes and blades can be used alone or in combination with brushes and blades. Can be configured. Further, the cleaning member may be constituted by a protrusion formed integrally with the member forming the cylindrical base 306. In any case, the cleaning member is configured to protrude outward from the outer peripheral surface of the cylindrical base body 306.

  Reference numeral 304 denotes a bearing pressing member, and 120 denotes a locking member that holds the bearing pressing member 304 to the lower case 101 of the mouthpiece body so as to be detachable (openable / closable), and is installed on the back side of the mouthpiece body.

  4 and 5 are exploded perspective views of the vicinity of the locking member 120 according to this embodiment. The locking member 120 has support portions 100a and 101a projecting from the upper case 100 and the lower case 101 as rotation shafts, one end side from the shaft center as an operation portion 120a at the time of opening and closing, and the opposite side as a locking portion 120b. , It is supported in the vertical direction by assembling, and the locking member 120 is prevented from coming off. The rotation of the locking member 120 allows the bearing pressing member 304 and the suction body 101 to be opened and closed (detached).

  On the inner side surface of the bearing pressing member 304, there is a hole 304a on the slit through which the locking portion 120b of the locking member 120 can protrude and retract, and a claw (not shown) for coupling to the lower case 101 is provided at the tip. ing.

  FIG. 5A shows that when the operating portion 120a of the locking member 120 is rotated outward from the mouthpiece center side, the locking portion 120b engaged with the bearing pressing member 304 is removed, and the bearing pressing member is removed from the mouthpiece 101. A state where the member 304 is detached is shown. (B) shows a state in which the operating portion 120a of the locking member 120 is rotated from the outside to the mouthpiece center side, and the locking portion 120b is engaged with the bearing pressing member 304 and attached to the mouthpiece 101. . The operation unit 120a is configured to be the same as or inside the outer surface of the mouthpiece case.

  Next, the operation of this embodiment will be described. When the vacuum cleaner user operates the switch operation unit 204 installed on the handle grip 203, the electric blower in the vacuum cleaner main body 201 operates in an operation mode according to the operated switch. The suction force generated by the electric blower reaches the suction body 206 through the hose body 202 and the extension pipe 205. At the same time, the power supplied from the power lines provided on the hose body 202 and the extension pipe 205 drives the electric motor 105 via the circuit board 106.

  When the rotary cleaning body 104 connected to the electric motor 105 with a pulley and a belt rotates, dust and dust are scraped and sucked from the surface to be cleaned by a brush and a blade which are cleaning members of the rotary cleaning body 104.

  The cleaning member 307 of the rotary cleaning body 104 is easily entangled with fibrous materials such as lint or hair, and once entangled, this type of dust is gradually accumulated by rotation, and is attached to the cylindrical base that fixes the cleaning member. It can be tightened.

  A method for cleaning the rotary cleaning body 104 that removes fiber such as lint entangled with the cleaning member 307 of the rotary cleaning body 104, hair, etc. will be described with reference to FIGS.

  First, the user shuts off the power by the switch operation unit 204 and removes the mouthpiece 206 from the extension pipe.

  As shown in FIG. 6, the lower surface side of the mouthpiece is directed to the upper surface side. An operator's finger is attached to the operation portion 120a of the locking member 120, and the finger is turned outward from the center side of the mouthpiece body to release the engagement between the bearing pressing member 304 and the locking portion 120b. Then, the bearing pressing member 304 is opened from the mouthpiece lower case 101 as shown in FIG. 7, and the bearing pressing member 304 is removed as shown in FIG. Next, as shown in FIG. 9, when the cleaning member on the bearing portion 319 side of the rotary cleaning body 104 is picked and pulled upward, the bearing portion 309 is fitted and detached from the shaft support portion of the suction body, and then the rotary cleaning body 104 is tilted. By pulling upward, the driven shaft coupling portion 318 is released from the engagement with the main shaft coupling portion 317, and the rotary cleaning body 104 can be detached from the suction body 206. Using the scissors and the cutter, the entangled dust is removed from the detached rotary cleaning body 104. At this time, the rotary cleaning body 104 can be washed with water.

  After the work, in order to incorporate the rotary cleaning body 104 into the mouthpiece 206 in the reverse manner, the teeth of the driven shaft joint portion 318 of the rotary cleaning body 104 are inserted into the teeth of the main shaft joint portion 317 inside the mouthpiece, The two are engaged by engaging each other, and the bearing portion 309 opposite to the rotary cleaning body 104 is pushed into the shaft support portion of the suction body from above. Next, the nail | claw 304a of the bearing holding member 304 is hooked on the suction body lower case 101, the bearing holding member 304 is attached, the operation part 120a of the latching member 120 protruding outside is rotated to the suction body center side, and the bearing What is necessary is just to engage with the pressing member 304 and the latching | locking part 120b.

  With the above configuration, the rotation locking member 120 uses the support portion protruding from the upper case and the lower case as the rotation axis, so that the sliding portion of the locking member 120 has a small area around the rotation axis. . Therefore, even if fine sand or dust entering from the gap portion of the case accumulates on the sliding portion, it can be easily rotated by operating the operation portion away from the shaft center. That is, like the lever principle, the operation of the locking member 120 can be easily performed with the force of a finger. The accumulation of a small amount of dust is advantageous for clogging dust because the movement does not become awkward when engaged and disengaged.

  Further, since the bearing pressing member 304 is configured to open when the operation portion 120a of the locking member 120 is rotated outward from the mouthpiece center side, it is opened when the operation portion 120a protrudes outward from the mouthpiece. Therefore, it can be determined that the operation unit 120a is closed when it is in the mouthpiece. Therefore, the open / close state of the bearing pressing member is clarified, and the suction port is not operated by mistake in the open state.

  Moreover, since the locking member 120 is installed on the back side of the mouthpiece body, it is possible to avoid an increase in size of the mouthpiece without changing the design. Since the operation unit 120a is configured to be the same as or inside the outer surface of the mouthpiece case, the locking member may come into contact with the wound when it is inserted into a gap in the furniture or the like, or it may become an obstacle. There is no.

  Further, since a tool such as a coin is not necessary for the removal operation of the rotary cleaning body 104, it is possible to easily perform a dust cleaning operation that is tedious and troublesome.

  FIG. 10 shows a partially enlarged perspective view of the lower front portion of the lower case 401 according to this embodiment. Reference numeral 402 denotes a bearing pressing member, which has protrusions 402a on both sides of the tip of the bearing pressing member 402, is pivotally supported by the lower case 401, and is rotatably held.

  Similarly to the first embodiment, when the cleaning operation of the rotary cleaning body 104 is performed, the locking member 120 is rotated outward from the center side of the suction body, and the engagement with the bearing pressing member 402 is released. Next, the bearing pressing member 402 is opened from the mouthpiece lower case 401. However, since a part of the bearing pressing member 402 is supported by the mouthpiece so as not to come off, loss or dissipation can be prevented.

  FIG. 11 shows a partially enlarged perspective view of the lower case 501 according to the present embodiment on the side of the locking member 120. The locking member 120 is formed with an operating portion 120a, a locking portion 120b for opening and closing the bearing pressing member 304, and a guide portion 120c for providing a click feeling during opening and closing operations. The lower case 501 is provided with ribs 502 and 503 so that the lower case 501 can come into contact when the guide portion 120c rotates.

  (A) is the state which the bearing pressing member 304 and the suction body 101 are engaging, and the operation part 120a of the latching member 120 is stored in the suction body. At this time, the movement of the guide portion 120c in the rotation direction is restricted by the rib 503. When the bearing pressing member 304 is rotated outward from the center side of the operation portion 120a to open the bearing pressing member 304, the guide portion 120c first comes into contact with the rib 503 to become a resistance, but when the rotation is continued, the rib 503 is overcome. At this time, a click feeling released from the resistance feeling of the operation is transmitted to the finger, and it can be felt that the operation has started. As shown in (b), the guide portion 120c comes into contact with the rib 502 and becomes resistance when it is further rotated outwards, and when it continues to rotate, it gets over the rib 502, feels a second click, and engages with the bearing pressing member 304. It can be actually felt that the locking portion 120b is released and the bearing pressing member 304 can be detached from the suction body 101.

  When the bearing pressing member 304 is engaged, the above is reversed.

  As described above, when the locking member 120 is rotated, a click feeling is provided, so that the state in which the bearing pressing member 304 and the suction body 101 are engaged and disengaged can be recognized by the touch and sound of the finger. Can provide reliable work.

  FIG. 12 is a perspective view of a driven shaft coupling portion 318 that engages with the main shaft coupling portion 317 according to the present embodiment, and FIG. 13 is a sectional view of each. Reference numeral 315 denotes a bearing unit, which includes a pulley 316 that transmits a driving force from the electric motor 105, and bearings 320 and 319 that incorporate bearings 323 and 322 on both sides of the pulley 316. Reference numeral 317 denotes a main shaft coupling portion that rotates integrally with the pulley 316 and the shaft 321 and transmits the rotational force of the electric motor. Engagement teeth 317 a for transmitting rotational force to the rotary cleaning body 104 are formed on the outer periphery of the main shaft coupling portion 317.

One end side of the rotary cleaning body 104 has a driven shaft coupling portion 318 that engages with the main shaft coupling portion 317, and an engagement tooth 318a is formed on the outermost periphery, and both are engaged by engaging with each other. . A cylindrical cylindrical body of the rotary cleaning body 104 is inserted in the inner periphery of the driven shaft coupling portion 318 , and a step is provided in the outer periphery to form an engagement tooth 318a.

  By providing the engagement teeth 318a outside the outer periphery of the rotary cleaning body 104, it is possible to secure the meshing height of the engagement teeth 318a even if the engagement teeth 317a and 318a have a short axial length. The length of the axial cleaning member can be used effectively.

In the engaging portion of the main shaft coupling portion 317 and the driven shaft coupling portion 318 of the rotary cleaning body 104, both the joint portions face each other with a gap in the axial direction and the circumferential direction. Is engaged .

FIG. 14 shows a state where the engagement teeth 317a of the main shaft coupling portion 317 and the engagement teeth 318a of the driven shaft coupling portion 318 are engaged. By moving the intersection 330 of the extension line of the wall surface with which the engagement tooth 317a and the engagement tooth 318a mesh with each other to the outer peripheral side from the central axis of the main shaft coupling portion 317, the wall surface of the engagement tooth 317a of the main shaft coupling portion 317 is engaged. The force pushing the wall surface of the tooth 318a is decomposed into a tangential force F1 and an axial force F2. Due to the axial force F2, a force pushed outward is applied to the engaging teeth 318a of the driven shaft coupling portion 318. As shown in FIG. 12, there are a plurality of engaging teeth 318a, each engaging tooth 318a is in a position symmetrical with respect to the central axis of the driven shaft coupling 318, and there are a plurality of engaging teeth 317a, Each engagement tooth 317a is in a position that is symmetric with respect to the central axis of the main shaft coupling 318. Thus, since this force works at all the meshing locations, they cancel each other out and stabilize when the rotations of the main shaft coupling portion 317 and the driven shaft coupling portion 318 become coaxial.

  Thereby, generation | occurrence | production of the noise by the shake at the time of rotation of the rotary cleaning body 104 is suppressed.

  Further, since the engaging portion meshes with the outer peripheral portion, it is easy to visually confirm, so that it can be easily attached and detached, and dust attached to the engaging portion can be easily found and cleaned.

  FIG. 15 is a perspective view of the pulley portion 316 of the bearing unit 315 according to this embodiment. Reference numeral 316a denotes radial ribs for cooling the bearings 323 and 322 disposed on both sides of the pulley 316.

  As shown in FIG. 13, the heat generated by the high-speed rotation of the bearings 323 and 322 is transmitted through the shaft 321 to dissipate heat when the end surface of the bearing portion 319 comes into contact with external air, and cooling is performed. In this embodiment, in order to enhance the cooling effect, radial ribs 316a are provided in the pulley portion 316, and air is diffused between the bearing portion 319 and the heat is released to the external air.

  Therefore, since the circulation with the external air becomes efficient, the temperature of the bearing does not rise, and the life of the bearing can be prevented from being deteriorated.

  Each embodiment of the present invention can be applied not only to a floor moving type vacuum cleaner but also to an upright type or stick type vacuum cleaner. It can be applied not only to motor-driven suction ports but also to air-driven systems.

It is a disassembled perspective view of the mouthpiece by this invention. It is an external view of the vacuum cleaner by this invention. It is a bottom view of the mouthpiece by this invention. It is a perspective view which shows the mounting state of the locking member of this invention. It is a partial enlarged plan view of the locking member of the present invention. It is a partial bottom perspective view of a mouthpiece by the present invention. It is a partial bottom perspective view of a mouthpiece by the present invention. It is a partial bottom perspective view of a mouthpiece by the present invention. It is a lower surface perspective view of the mouthpiece by this invention. It is a partial expanded perspective view of the lower case which shows the 2nd Example of this invention. It is a partial expansion perspective view of the lower case which shows the 3rd Example of the present invention. It is a perspective view of the shaft coupling part which shows the 4th Example of this invention. It is sectional drawing of the bearing part which shows the 4th Example of this invention. It is the elements on larger scale of the shaft coupling part which shows the 4th Example of this invention. It is a perspective view of the pulley part which shows the 5th Example of this invention.

  DESCRIPTION OF SYMBOLS 104 ... Rotary cleaning body, 120 ... Locking member, 120a ... Operation part, 120b ... Locking part, 120c ... Guide part, 201 ... Vacuum cleaner main body, 206 ... Suction body, 304, 402 ... Bearing pressing member, 309 ... Bearing 315: Bearing unit part, 316a: Radial rib, 317 ... Driving shaft coupling part, 317a, 318a ... Engaging tooth, 318 ... Driven shaft coupling part, 502, 503 ... Rib.

Claims (2)

In a vacuum cleaner comprising a vacuum cleaner body having an electric blower and a dust collector, and a suction body having an opening facing the surface to be cleaned and communicating with the dust collector,
The mouthpiece comprises a rotary cleaning body, an electric motor for driving the rotary cleaning body, a bearing unit portion incorporating a bearing, and a pulley for transmitting a driving force from the electric motor,
A main shaft coupling that rotates integrally with the pulley and transmits the rotational force of the electric motor;
A driven shaft coupling that engages with the main shaft coupling is provided on one end side of the rotary cleaning body,
The engaging portion of the main shaft coupling and the driven shaft joint is located on the outermost periphery of each of the main shaft coupling and the driven shaft joint,
The engagement portion of the driven shaft coupling is outside the outer periphery of the cylindrical cylinder of the rotary cleaning body,
A bearing portion that pivotally supports the main shaft coupling in the suction body is disposed on both sides of the pulley,
Vacuum cleaner, wherein the radial ribs for cooling the bearing to the pulley provided between the bearing part, to diffuse the air.
In the electric vacuum cleaner according to claim 1,
The engagement portion of the main shaft joint has uneven teeth,
The engagement portion of the driven shaft joint has uneven teeth that engage with the main shaft coupling,
The intersection of the extension lines of the surfaces where the teeth of the main shaft coupling and the teeth of the driven shaft joint mesh with each other is located on the outer peripheral side of the central axis of the main shaft coupling,
The teeth of the driving shaft coupling is in the positions symmetrical with respect to a center axis of the driving shaft coupling, the teeth of the driven shaft joint Ri position near which are symmetrical with respect to the rotational axis of the rotary cleaning body,
A shaft support part that supports the other end side opposite to the one end side of the rotary cleaning body provided with the driven shaft coupling; and a pressing member that presses the other end side of the rotary cleaning body; facing upward, the pressing release the member, in a state where said main drive shaft coupling and the driven shaft coupling is engaged, and wherein the pulling enables der Rukoto the other end of the rotary cleaning body upward electric Vacuum cleaner.

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