CN109091064B - Suction inlet body of electric dust collector - Google Patents

Abstract

The invention provides a suction port body of an electric dust collector, which can open a baffle plate when the suction port body moves forwards and close the baffle plate when the suction port body moves backwards so as to ensure the tightness with the floor and improve the pressure of a suction flow path when the suction port body moves backwards. The suction port body of the electric vacuum cleaner is provided with a suction port casing (110) with a suction port (111) on the lower surface and a movable baffle (120) arranged in front of the suction port (111), the movable baffle (120) is provided with a contact rotating part (123) which contacts with a floor surface M and rotates when the suction port casing (110) moves forwards and backwards and a baffle part (121) which forms an opening formed by a gap (S1) with the floor surface M when the suction port casing (110) moves forwards and closes the gap (S1) when the suction port casing (110) moves backwards, the contact rotating part has a curvature at the contact starting part with the floor surface and at least one hollow part, and in addition, when the suction port casing (110) moves backwards, the lowest part of the baffle part (121) is positioned at the lower side than the lowest surface of the suction port casing (110).

Description

Suction inlet body of electric dust collector

Technical Field

The present invention relates to a suction port body of an electric dust collector.

Background

As a suction port body of an electric vacuum cleaner, a suction port body in which an opening/closing member is attached to a front side of a dust collection opening as in patent document 1, and a suction port body in which a rotating body is provided in front of a dust collection opening as in patent document 2 are described.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2004-350763

Patent document 2: japanese laid-open patent publication No. 11-239551

Disclosure of Invention

Problems to be solved by the invention

However, in the invention described in patent document 1, a soft member made of cloth such as a napped cloth is used as the inversion imparting member of the opening/closing member (shutter). Therefore, there is a problem that the resistance becomes small in the wood floor or the like and the reverse rotation (rotation) is not possible.

In the invention described in patent document 2, although the rotating member for rotating the rotating body (flap) is brought into contact with the floor surface, there is no description about the relationship between the rotating body and the floor surface, and there is a problem that it is difficult to ensure the sealing property when the rotating body is not brought into contact with the floor surface.

The invention aims to provide a suction port body of an electric dust collector, which can open a baffle when the suction port body moves forwards and close the baffle when the suction port body moves backwards, thereby ensuring the tightness with the floor and improving the pressure of a suction flow path when the suction port body moves backwards.

Means for solving the problems

The present invention is provided with: a suction port casing having a suction port on a lower surface; and a movable flap of a movable type provided in at least one of front and rear directions of the suction port, the movable flap including: a contact rotation part which rotates by contacting with the floor surface when the suction port casing moves forward and backward; and a baffle portion that forms an opening between the suction port and the floor surface when the suction port housing is moved forward and closes the opening when the suction port housing is moved backward, wherein the contact rotation portion has a curvature at a contact start portion with the floor surface and has at least one hollow portion, and a lowermost portion of the baffle portion is the same as or located lower than a vicinity of the suction port in the suction port housing when the suction port housing is moved backward.

Effects of the invention

According to the present invention, it is possible to provide a suction port body of an electric vacuum cleaner which can suck large dust (dirt) by opening a shutter when the suction port body moves forward, and which can keep a suction flow path at a high pressure by closing the shutter when the suction port body moves backward to ensure sealing with a floor and can suck the dirt more reliably.

Drawings

Fig. 1 is an overall perspective view of an electric vacuum cleaner used as a stick type.

Fig. 2 is a left side view of the electric vacuum cleaner as a handheld type.

Fig. 3 is a plan view of the electric vacuum cleaner shown in fig. 2 with the suction port body removed.

Fig. 4 is a sectional view IV-IV of fig. 3.

Fig. 5 is a bottom view of the mouthpiece body.

Fig. 6 is a perspective view showing the movable flapper.

Fig. 7 is a side view showing the contact rotating portion.

Fig. 8 is a front view showing the movable flapper.

FIG. 9 is a longitudinal sectional view showing the mouthpiece when advancing.

Fig. 10 is a cross-sectional view XI-XI of fig. 10.

FIG. 11 is a side view of the movable flapper when the suction body advances.

FIG. 12 is a longitudinal sectional view showing the mouthpiece at the time of retreat.

Fig. 13 is a cross-sectional view XIII-XIII of fig. 12.

FIG. 14 is a side view of the movable fence when the suction port body is retracted.

Fig. 15 is a bottom view showing a state where the lid member is detached from the mouthpiece.

Fig. 16 is a bottom view showing a state in which the movable flapper is further detached from the state of fig. 14.

Fig. 17 is a perspective view showing a modification of the contact rotation portion.

Fig. 18 is a perspective view showing another modification of the contact rotation portion.

Fig. 19 is a perspective view showing another modification of the contact rotation portion.

Fig. 20 is a sectional view showing a movable flapper provided in a suction port body according to a second embodiment.

Fig. 21 is a sectional view showing a movable flapper provided in a suction port body according to a third embodiment.

In the figure:

3-suction port body, 110-suction port housing, 111-suction port, 112-cover member, 112a, 113 a-lowermost surface, 120A, 120B, 120C, 120D-movable flapper, 121-flapper section, 121 f-recess, 121S-lowermost section, 121 t-uppermost section, 122, 123, 125, 127, 129-contact rotation section, S1-gap (opening).

Detailed Description

Hereinafter, a mode for carrying out the present invention (hereinafter, referred to as "embodiment") will be described in detail with reference to the accompanying drawings as appropriate.

(first embodiment)

The electric vacuum cleaner to which the present embodiment is applied can be used as a stick type cleaner with the length of the telescopic duct extended with respect to the cleaner body, and can also be used as a handheld type cleaner with the length of the telescopic duct shortened.

In the present embodiment, the stick type electric vacuum cleaner and the hand-held electric vacuum cleaner described above are exemplified, but the present invention is also applicable to a so-called cylinder type electric vacuum cleaner including a cleaner main body, an operation pipe connected to a hose portion and provided with a hand-operated switch SW and the like, an extension pipe and a suction port body which are provided so as to be extendable and retractable, and a charging type electric vacuum cleaner including a type including an electric vacuum cleaner main body, an extension pipe and a suction port body.

Fig. 1 is an overall perspective view of an electric vacuum cleaner 100 used as a stick type. Fig. 2 is a left side view of the electric vacuum cleaner 100 for handheld use. Fig. 3 is a plan view of the electric vacuum cleaner 100 shown in fig. 2 with the suction port body 3 removed. Fig. 4 is a sectional view IV-IV of fig. 3. The telescopic catheter 20 in fig. 2 and 3 is indicated by a hidden line (broken line). In the following description, the directions of the electric vacuum cleaner 100 in the front-rear, top-bottom, and right-left directions are based on the directions of the arrows in fig. 1 and 2 in the front-rear, top-bottom, and right-left directions.

As shown in fig. 1 and 2, the electric vacuum cleaner 100 includes a suction port body 3, a cleaner body 1, an extendable pipe 20 (see fig. 1), a first handle 30, and a lock/unlock device (not shown) for the extendable pipe 20.

Suction body

The suction port body 3 is detachably attached to a suction port 15 (see fig. 4) opened in the front of the cleaner body 1.

The mouthpiece 3 shown in fig. 1 is a power brush type mouthpiece 3a incorporating a motor-driven rotary brush, and the mouthpiece 3 shown in fig. 2 is a gap mouthpiece 3 b. The suction body 3 of the electric vacuum cleaner 100 is not limited to the power brush type suction body 3a and the gap suction nozzle 3b, and other suction bodies may be used. The electric vacuum cleaner 100 can be used without attaching the suction body 3. The suction port body 3 in the present embodiment can be detached from the cleaner body 1 by pressing a suction port body attachment/detachment button 16 provided at the distal end of the cleaner body 1. The details of the suction port body 3 will be described later.

The electric vacuum cleaner 100 shown in fig. 1 and the electric vacuum cleaner 100 shown in fig. 2 have the same configuration except that the length of the extension duct 20 to be extended is different, and the suction nozzle body 3 is different as described above, and the power brush type suction nozzle body 3a and the gap suction nozzle 3b are respectively provided.

Vacuum cleaner main body

The cleaner body 1 includes an electric blower 40 (see fig. 4), a body board 44 (see fig. 4), a battery 60 (see fig. 4), and the like, which will be described later, in the casing 10. Further, the cleaner body 1 includes: a cyclone type dust collecting device 2 detachably attached to the housing 10; and an air introduction pipe (not shown) for sending the air containing dust sucked from the suction port body 3 to the dust collecting device 2.

The outer shape of the cleaner body 1 is substantially constituted by the outer shape forming the casing 10 and the dust collecting device 2, and is long in the front-rear direction. In addition, a second handle 33 is formed on the housing 10 of the cleaner body 1.

< housing >

As shown in fig. 1, the case 10 includes a duct case portion 13, a motor case portion 11, a battery case portion 12, and an introduction duct case portion 14.

The duct housing portion 13 is formed to extend an upper portion of the cleaner body 1 in the front-rear direction. As will be described later, the duct housing portion 13 has a second handle 33 formed near the rear portion of the cleaner body 1. The outer shape of the duct housing portion 13 is a convex shape extending in the front-rear direction except for the second grip 33 portion.

As shown in fig. 3 and 4, the duct housing portion 13 accommodates an extensible duct 20 (duct member 21) described later inside when the electric vacuum cleaner 100 is used as a handheld type. When the electric vacuum cleaner 100 is used as a stick type, the duct member 21 extends from the rear end of the cleaner body 1 to the outside of the duct housing portion 13 as shown in fig. 1.

As shown in fig. 1 and 2, the motor housing portion 11 is disposed between the duct housing portion 13 and the battery housing portion 12 below the duct housing portion 13 and in a range of a substantially rear half portion of the cleaner body 1. As shown in fig. 3, the motor housing portion 11 is formed to be wider in the left-right direction than the duct housing portion 13.

As shown in fig. 1 and 2, the battery case 12 is disposed below the motor case 11 in a range of a substantially rear half of the cleaner body 1. As shown in fig. 3, the battery case portion 12 is formed to be wider in the left-right direction than the duct case portion 13 and narrower in the left-right direction than the motor case portion 11.

The inlet duct housing portion 14 is disposed so as to cover an air inlet duct 17 (see fig. 5) described later from above.

In fig. 1 and 2, reference numeral 80 denotes a rotary brush.

As shown in fig. 3, the inlet pipe housing portion 14 is disposed so as to extend to the right of the pipe housing portion 13 in a range of substantially the front half of the cleaner body 1.

Electric blower, main body board, and battery

As shown in fig. 4, the electric blower 40 is housed in the motor housing portion 11. Specifically, the electric blower 40 is supported by screws or the like in a fixed case 11a disposed in the motor case 11.

The electric blower 40 includes a fan 41 and a motor 43 for driving the fan 41 about a rotary shaft 42.

In the present embodiment, electric blower 40 is disposed such that fan 41 faces forward, and rotation shaft 42 is parallel to telescopic duct 20.

The electric blower 40 sucks air from the front portion facing the dust collecting device 2 side. The exhaust gas from electric blower 40 flows rearward in fixed case 11 a.

The main body boards 44 and 44 are control boards for controlling the cleaner main body 1, and are fixed to the rear of the electric blower 40 by screws or the like in the fixed case 11 a.

The main substrates 44 and 44 in the present embodiment are disposed to be divided into upper and lower parts, and electronic components are mounted on the facing surfaces. Most of the air discharged from electric blower 40 flows to cool the electronic components disposed opposite to body substrates 44 and 44. The exhaust gas flowing out of a predetermined opening (not shown) of the fixed housing 11a is discharged to the outside of the apparatus through an exhaust port (not shown) formed by a plurality of slits or the like penetrating the inside and outside of the motor housing 11. A filter may be disposed in the exhaust port.

The battery 60 is housed in the battery housing portion 12. The battery 60 in the present embodiment is formed in a rectangular parallelepiped shape which is flat in the vertical direction. The battery 60 is a main power source of the electric vacuum cleaner 100, and is electrically connected to the main body substrate 44, the electric blower 40, and the like.

The battery 60 is formed of a rechargeable secondary battery such as a lithium ion battery or a nickel metal hydride battery. The battery 60 in the present embodiment is assumed to be an assembled battery using a plurality of cells, but the cells are used depending on the use conditions of the electric vacuum cleaner 100 and the like.

Fig. 5 is a bottom view of the mouthpiece body. Fig. 5 shows a state when the mouthpiece 3 is retracted.

As shown in fig. 5, the suction port body 3 includes a suction port casing 110 and a movable flapper 120.

The suction port housing 110 has a substantially rectangular shape (a horizontally long rectangular shape) in plan view from the bottom surface, and has a substantially rectangular suction port 111 as shown by a thick broken line in fig. 5. That is, the suction port casing 110 has a suction port 111 (an area surrounded by a thick broken line in fig. 5) in a bottom surface of the suction port casing 110.

The suction port casing 110 includes removable covers 112 and 113 on both left and right sides of the suction port 111. The cover member 112 is a rod-fixed type member, and the cover member 113 is a screw-fixed type member.

The cover member 112 is provided with a roller 112r that supports the suction port casing 110 on the floor surface. The cover member 113 is provided with a roller 113r that supports the suction port casing 110 on the floor surface.

The movable flapper 120 has a long strip shape extending in the left-right direction, and is provided at the front end of the suction port housing 110. The movable flap 120 extends to the positions of the left and right cover members 112, 113.

The suction element 3 includes a first rotary cleaning element 130 and a second rotary cleaning element 140. The first rotary cleaning element 130 is disposed behind the movable flap 120 in the suction port 111. The second rotary cleaning element 140 is disposed behind the suction opening 111.

The first rotary cleaning element 130 is formed by embedding bristles in the outer periphery of a core member provided at the axial center. The brush portion of the rotating brush 130 is disposed to extend from the lid member 112 to the lid member 113.

The second rotary cleaning element 140 is circular in cross section and is arranged parallel to the first rotary cleaning element 130. The second rotary cleaning element 140 is formed to be slightly longer than the first rotary cleaning element 130 in the axial direction. The second rotary cleaning element 140 is disposed to face the first rotary cleaning element 130 in the front-rear direction.

Here, the second rotary cleaning element has a tube body fixed around the shaft portion, and a bristle body (napped cloth) is embedded in the outer peripheral surface of the tube body.

The rotational driving force of the second rotary cleaning element is a frictional force between the bristle body and the floor surface, and the rotational braking force of the second rotary cleaning element is a frictional force between the bristle body and the projection. The fine fibers constituting the bristle bodies are inclined in the circumferential direction with respect to the tube body in a direction from the front of the suction member toward the rear at a position where the bristle bodies contact the floor surface. Therefore, when the suction tool is moved forward, the frictional force between the bristle body and the floor surface, that is, the rotational driving force of the second rotary cleaning element, is reduced, the frictional force between the bristle body and the projection, that is, the rotational braking force of the second rotary cleaning element, is increased, and the rotation of the second rotary cleaning element is restricted. On the other hand, when the suction tool is retracted, the frictional force between the brush body and the floor surface, that is, the rotational driving force of the second rotary cleaning element, is increased, the frictional force between the brush body and the projection, that is, the rotational braking force of the second rotary cleaning element, is decreased, and the second rotary cleaning element rotates.

In the present embodiment, the rotation of the second rotary cleaning element is substantially locked when the suction element is moved forward, but the rotation of the second rotary cleaning element is not necessarily locked, and dust scooped into the suction chamber by the first rotary cleaning element can be prevented from being swept out to the rear of the suction port main body if the rotation of the second rotary cleaning element is slower than that of the free time when the suction element is moved forward.

In the present embodiment, the case where the bristle bodies are arranged uniformly in the entire circumferential direction of the catheter body has been described as an example, but the present invention is not limited to this, and the bristle bodies may be arranged spirally with respect to the axial direction of the shaft portion, as in the case of the first rotary cleaning body.

Further, it is preferable that the first rotary cleaning element has one end and the other end of a different color tone (for example, one side is green and the other side is blue), and the second rotary cleaning element has one end and the other end of a color tone corresponding to the color tone of the one end and the other end of the first rotary cleaning element (one side is green and the other side is blue). This prevents the reverse grain direction of the bristle body from being reversed when the second rotary cleaning element is removed and reassembled.

Fig. 6 is a perspective view showing the movable flapper.

As shown in fig. 6, the movable flapper 120 includes a flapper 121 and contact rotating portions 122 and 123.

The shutter portion 121 includes a shutter 121a extending in the axial direction (left-right direction) and a shaft portion 121b that rotatably operates the shutter 121 a. Further, the baffle portion 121 is formed of, for example, a soft member, and thus damage to the floor surface can be prevented.

The soft member can be appropriately selected from elastomers, vinyl chloride, natural rubber, vinyl rubber, silicone rubber, synthetic rubber such as urethane rubber, and the like. The baffle 121 is not limited to a soft member, and may be a hard member as long as it can ensure airtightness of the suction port 111. Can be selected from synthetic resins such as ABS (acrylonitrile butadiene styrene), PP (polypropylene), POM (polyacetal).

The shaft portion 121b includes a shaft 121c made of metal such as stainless steel or iron, and a covering portion 121d that closely covers the periphery of the shaft 121 c. The shaft portion 121b is formed by insert molding in which the covering portion 121d is formed of the same resin as the baffle portion 121 and the shaft 121c is disposed inside.

Therefore, when a soft member is used for the baffle portion 121 and the covering portion 121d, although the baffle portion 121 and the covering portion 121d may be subjected to flexural deformation, the rigidity of the baffle portion 121 can be ensured by inserting the shaft 121c into the covering portion 121 d. Further, when the baffle portion 121 is formed of a hard member and the rigidity of the baffle portion 121 can be ensured, the shaft 121c is not necessary, and the structure can be simplified.

The shaft portion 121b has an exposed portion 121e formed at the center in the axial direction (left-right direction) thereof, in which the covering portion 121d is removed to expose the shaft 121 c. Shaft ends 121f and 121g at both left and right ends of the shaft 121c protrude from both left and right sides of the covering 121 d.

Contact rotating portions 122, 123 are formed at both left and right ends of the shaft portion 121 b. Specifically, the shutter 121 is formed integrally with both left and right ends of the covering portion 121 d. That is, the contact rotation portions 122, 123 are formed integrally with the shutter portion 121.

The shutter portion 121 and the contact rotating portions 122 and 123 may be integrally formed as described above, but may be formed as separate bodies.

Fig. 7 is a side view showing the contact rotating portion.

As shown in fig. 7, the contact rotation portion 122 is constituted by a front contact rotation portion 122f which is hollow and substantially fan-shaped (or triangular-shaped), a rear contact rotation portion 122g, and a hollow portion 122c provided therebetween. The front contact rotating portion 122f includes a contact portion 122a and a front surface portion 122d, and a curved surface portion (contact start portion) 122h is provided between the front surface portion 122d and the contact portion 122 a. The rear contact rotating portion 122g includes a contact portion 122b and a rear surface portion 122e, and a curved surface portion 122i (contact start portion) is provided between the contact portion 122b and the rear surface portion 122 e. That is, the corner portions ( curved surface portions 122h, 122i) which come into contact with the floor surface when the movable fence rotates have at least a curvature of R1 or more. The angle formed by the front surface portion 122d of the contact portion 122a and the rear surface portion 122e of the contact portion 122b is set to substantially 90 °. The contact rotation portion 123 has the same configuration, and includes a contact portion 123a, a contact portion 123b, a hollow portion 123c, a front surface portion 123d, a rear surface portion 123e, a front contact rotation portion 123f, a rear contact rotation portion 123g, and curved surface portions 123h and 123 i. The front contact rotating portion 122f (123f) and the rear contact rotating portion 122g (123g) each include a hollow C, D.

Fig. 8 is a front view showing the movable flapper. Fig. 8 shows a state when the vehicle is retreated when viewed from the front.

As shown in fig. 8, the movable flapper 120 is provided with contact rotating portions 122, 123 at both left and right ends of the flapper portion 121. When the suction body 3 (see fig. 5) retreats, the flap 121 (flap 121a) is directed downward.

Further, the arc portion leading ends 122s, 123s of the movable flapper 120 contacting the rotating portions 122, 123 protrude below the lowermost portion 121s of the flapper 121. This enables the movable flapper 120 to rotate starting from the contact rotating portions 122, 123.

FIG. 9 is a longitudinal sectional view showing the mouthpiece when advancing. Fig. 9 shows a state in which the suction body 3 is placed on the floor surface M (assumed to be a wooden floor). In fig. 9, a portion indicated by a thick broken line shows the suction flow path (the same applies to fig. 12).

As shown in fig. 9, the movable flapper 120 is disposed in front of the rotary brush 130. Shaft ends 121f and 121g (see fig. 6) at both left and right ends of a shaft 121c of the movable flapper 120 are rotatably supported by the suction port housing 110.

The shaft 121c of the movable flapper 120 exposed from the exposed portion 121e is rotatably held by the holding portion 102 formed in the suction port casing 110. This prevents the long movable shutter 120 from falling off during operation.

The holding portion 102 has a shape in which a notch portion 102a is formed at the bottom of a member formed in a substantially U shape in cross section. The shaft 121c can be attached and detached by providing the notch 102 a.

When the suction port body 3 moves forward, the contact rotation portion 123 rotates counterclockwise about the shaft 121c due to the frictional force generated when the contact rotation portion 123 comes into contact with the floor surface M. The contact rotation portion 123 rotates, and the shutter portion 121 also rotates counterclockwise. The shutter portion 121 rotates to an angle of contact with the rotating brush 130. Thus, a gap S1 (opening) is formed between the flap 121 and the floor surface M, and relatively large dust (dirt) can be sucked from the front of the suction body 3.

Fig. 10 is a cross-sectional view XI-XI of fig. 9. Further, fig. 10 is a state in which the front is viewed from the inside of the suction port housing 110.

As shown in fig. 10, the suction body 3 advances, and the movable flapper 12 rotates by the frictional resistance between the contact rotating portions 122 and 123 on the left and right sides and the floor surface M. Thereby, a wide gap S1 is formed between the contact rotation portion 122 and the contact rotation portion 123.

Fig. 11 is a side view of the contact rotation portion 123 when the mouthpiece advances. The shape of the front contact rotating portion 123f when contacting the floor surface is indicated by a thick line. When the vehicle travels forward, the contact portion 123a contacts the floor surface M, but the front contact rotating portion 123f is hollow and has a hollow portion C, and therefore, the front surface portion 123d is largely bent rearward and the front contact rotating portion 123f itself is also bent rearward (the hollow portion 123C). By these two bending effects, the load applied to the contact rotating portion by the friction with the floor surface M can be dispersed (removed) without being concentrated, the wear of the contact rotating portion 123 can be suppressed, the breakage such as the breakage can be prevented, and the force required for the front-rear operation of the suction body can be reduced. Further, since the curved surface portion 123h, which is a contact start portion with the floor surface M, is provided with a curvature, it is possible to prevent the floor surface M from being damaged.

Further, since the deflection is small when the floor surface with small resistance such as a wooden floor is operated, and the deflection is large when the floor surface with large resistance such as a carpet with long pile is operated, the above-described effects can be obtained regardless of the floor surface at the time of operation.

FIG. 12 is a longitudinal sectional view showing the mouthpiece at the time of retreat.

As shown in fig. 12, when the suction port body 3 retreats, the contact rotating portion 123 rotates clockwise about the shaft 121c due to the frictional force when the contact rotating portion 123 contacts the floor surface M. The contact rotating portion 123 rotates, and the baffle portion 121 also rotates clockwise. Accordingly, the front end portion of the suction port casing 110 is closed by the baffle portion 121, so that the sealing property with the floor surface M is secured, and the pressure inside the brush chamber accommodating the rotary brush 130 can be increased as compared with the case where the suction port body 3 is moved forward, and dust can be sucked more reliably. When the suction body 3 moves backward, the shutter 121 closes the front end of the suction casing 110, thereby preventing dust from penetrating forward of the suction body 3.

As shown in the enlarged view of fig. 12, the flap 121 is oriented downward when the mouthpiece 3 is retracted. At this time, the flap 121 is inclined forward at an angle θ with respect to the vertical direction. In fig. 12, the description is exaggerated to facilitate understanding of the description.

By inclining the flap 121 in this manner, the frictional resistance between the flap 121 and the floor surface M can be reduced when the mouthpiece 3 is retracted, as compared with the case where the flap 121 is directed downward in the vertical direction, and the operability of the mouthpiece 3 can be improved.

Fig. 13 is a cross-sectional view XIII-XIII of fig. 12.

As shown in fig. 13, when the suction port body 3 retreats, the shutter portion 121 faces downward and closes the front end portion of the suction port casing 110. At this time, the lowermost portion 121s of the shutter portion 121 is positioned below (on the floor surface M side) the lowermost surfaces 112a and 113a (the vicinity of the suction port 111) of the suction port casing 110.

Further, a gap S2 is formed between the lowermost portion 121S of the flap portion 121 and the floor surface M. The gap S2 is set to 1mm to 2mm, for example. That is, the lowermost portion 121s is located above (on the side away from the floor surface M) the tip end portions (lower ends) 122s, 123s of the contact rotating portions 122, 123. Thus, as described above, the baffle portion 121 can be stably rotated starting from the contact rotating portions 122 and 123.

Further, the shaft 121c (see fig. 12) is held by the holding portion 102 not only at both left and right ends of the suction port housing 110 but also at the center portion in the left-right direction, and therefore, the baffle portion 121 can be rotated stably.

Fig. 14 is a side view of the contact rotating portion 123 when the mouthpiece retreats. The shape of the rear contact rotating portion 123g when in contact with the floor surface is indicated by a thick line. When the vehicle moves backward, the contact portion 123b contacts the floor surface M, but the rear contact rotating portion 123g has a hollow shape and is provided with the hollow portion D, and therefore, the rear surface portion 123e of the rear contact rotating portion 123g is largely bent forward, and the rear contact rotating portion 123g itself is also bent forward (the hollow portion 123 c). By these two bending effects, the load applied to the curved surface portion 123i as the contact rotating portion by the friction with the floor surface M can be dispersed (removed) without being concentrated, and the abrasion of the contact rotating portion 123 can be suppressed, and the force required for the front-rear operation of the suction body can be reduced while preventing the breakage such as the breakage. Further, since the curvature is provided at the contact start portion with the floor surface M, the floor surface M can be prevented from being damaged. Further, since the deflection is small when the floor surface is operated with a small resistance such as a wood floor, and the deflection is large when the floor surface is operated with a large resistance such as a carpet with a long pile, the above-described effects can be obtained regardless of the floor surface at the time of the operation.

Further, the front surface portion 123d of the front contact rotating portion 123f abuts against the suction port housing to restrict the rotation of the movable flapper 120, so that the movable flapper 120 does not fall down excessively forward and fall down to the opposite side (rearward).

Fig. 15 is a bottom view showing a state where the cover member is removed from the suction port body, and fig. 16 is a bottom view showing a state where the movable flapper is further removed from the state of fig. 15.

As shown in fig. 15, in the mouthpiece 3 of the present embodiment, covers 112 and 113 are detachably attached to the bottom surfaces of the left and right ends of the mouthpiece housing 110. The cover member 112 can be removed by operating a lever not shown. The lid member 113 is fixed to the mouthpiece housing 110 via screws 116 (see fig. 5). Fig. 15 shows a state where the lid member 113 is removed for convenience of explanation.

By removing the cover member 112, the shaft end 121g of the shaft 121c of the movable shutter 120 is exposed. Shaft end 121g is rotatably held by bearing 104 provided on the lower surface of suction port casing 110. The bearing 104 is formed with a cutout portion having a diameter smaller than that of the shaft 121c, and the shaft end portion 121g of the shaft 121c is configured to be attachable to and detachable from the bearing 104.

Further, by removing the cover member 112, the shaft portion 130a of the first rotary cleaning element 130 and the shaft portion 140a of the second rotary cleaning element 140 are exposed. This allows the first rotary cleaning element 130 and the second rotary cleaning element 140 to be detached from the suction housing 110.

When the cover member 113 is removed from the mouthpiece housing 110, a bearing 103 is formed to hold a shaft end 121f of the shaft 121c of the movable shutter 120. The bearing 103 has a hole shape supported by the shaft end 121f of the shaft 121c being inserted.

When the movable shutter 120 is detached from the mouthpiece housing 110, the shaft end 121g of the shaft 121c is exposed by detaching the cover member 112 with the cover member 113 attached to the mouthpiece housing 110, and therefore, the shaft end 121g is detached from the bearing 104 and the central portion of the shaft 121c is detached from the holding portion 102. Then, by sliding the movable flapper 120 in the right direction, the movable flapper 120 can be detached from the suction port housing 110. Fig. 16 shows a state where the movable flapper 120 is detached from the suction port housing 110.

In the state shown in fig. 16, when the movable flap 120 is attached to the mouthpiece casing 110, the lid member 113 is attached to the mouthpiece casing 110, and in this state, the shaft end 121f of the shaft 121c is inserted into the bearing 103 while sliding from right to left, and held. Then, the shaft 121c of the exposed portion 121e (see fig. 6) is fitted and held in the holding portion 102. Then, the shaft end 121g of the shaft 121c is fitted and held in the bearing 104.

With this configuration, by detaching one of the cover members 112 from the mouthpiece casing 110, the movable flap 120 can be detached from the mouthpiece casing 110, the movable flap 120 can be attached to the mouthpiece casing 110, and the attachment and detachment of the movable flap 120 are facilitated.

As described above, the mouthpiece 3 according to the first embodiment includes: a suction port housing 110 having a suction port 111 in a lower surface; and a movable flapper 120 of a movable type provided in front of the suction port 111. The movable flapper 120 includes: contact rotating portions 122, 123 that rotate by contacting the floor surface M when the suction port casing 110 moves forward and backward; and a shutter portion 121 that forms an opening (gap S1) with the floor surface when the vehicle travels forward, and closes the opening (gap S1) when the vehicle travels backward. When the suction port casing 110 retreats, the lowermost portion 121s of the baffle portion 121 is positioned below the lowermost surfaces 112a, 113a of the suction port casing 110 (in the vicinity of the suction port 111). Accordingly, when the suction port body 3 advances, the front side is opened to suck relatively large dust (dirt), and when the suction port body 3 retreats, the front opening is closed to ensure sealing with the floor surface M, and the pressure in the suction port 111 can be increased as compared with the advance. As a result, dust (dirt) can be reliably sucked in.

In the first embodiment, the suction port casing 110 includes the cap 112 that is detachable, and the shaft end 121g (end of the shaft 121 c) of the movable flapper 120 is positioned between the main body side of the suction port casing 110 and the cap 112. This can secure a wide suction width W (see fig. 5) of the dust. Further, the shaft 121c can be prevented from falling off when being supported by the lid member 112.

The contact rotation portions 122 and 123 are formed of a soft material. This enables the flap 121 to stably rotate without damaging the floor surface M such as a wooden floor. That is, the opening forming operation (the gap S1) when the mouthpiece 3 advances and the opening closing operation (the gap S1) when the mouthpiece 3 retreats can be smoothly performed.

In the first embodiment, the contact rotating portions 122 and 123 are described as an example, but the contact rotating portions 125, 127, and 129 shown in fig. 17, 18, and 19 may be used. Fig. 17 is a perspective view showing a modification of the contact rotation portion, and fig. 18 is a side view of the contact rotation portion when the suction body advances. Fig. 18 and 19 are perspective views showing other modifications of the contact rotating portion.

As shown in fig. 17, the movable flapper 120A is provided with a contact rotation portion 125 instead of the contact rotation portion 122 of the first embodiment. The contact rotating portion 125 includes a tongue 125a protruding radially outward, and a tongue 125b and a tongue 125c protruding radially outward at positions different from the tongue 125 a. The tongue 125a is bent by 90 ° and has a shape that extends the length of the tongue to the maximum extent in order to reduce the rigidity of the portion in contact with the floor surface and to disperse (remove) the resistance received from the floor surface.

The tongue 125a and the tongue 125c have a shape in which the tips are bent in the axial center direction in order to prevent the hairs and the like of the carpet from being caught when they contact the floor surface.

The hollow portion can be provided by the gap between the tongue 125a, the tongue 125b, and the tongue 125c and the bending of the tongue 125a, and the tongue 125a and the tongue 125c that are in contact with the floor surface can be greatly deflected, and the same effect as the contact rotating portions 122 and 123 described above can be obtained. Further, the tongue 125a contacts the floor surface when the suction body moves forward, the tongue 125c contacts the floor surface when moving backward, and the tongue 125b is provided for the purpose of assisting the contact of the rotating portion 125 with the floor when switching between forward movement and backward movement, and the tongue 125b can be omitted when the rotating flapper can be smoothly rotated only by the tongue 125a and the tongue 125 c. Conversely, the plurality of tongues 125b may be provided for smooth rotation of the rotating shutter 120A, or may be formed in a shape that is more likely to contact the floor surface, such as a shape that is curved at the tip, formed in a thick wall, formed in a spherical shape, or formed in a triangular shape (e.g., reuleaux triangle).

As shown in fig. 18, the movable flapper 120B is provided with a contact rotation portion 127 instead of the contact rotation portion 122 of the first embodiment. The contact rotation portion 127 includes a tongue portion 127a protruding radially outward, a tongue portion 127b protruding radially outward at a position different from the tongue portion 127a, and a tongue portion 127 c.

Since the gaps between the tongue portion 127a, the tongue portion 127b, and the tongue portion 127c are hollow portions, the tongue portion 127a and the tongue portion 127c which are in contact with the floor surface can be greatly deflected, and the same effect can be obtained.

Further, by providing the dimension relationship such that the tongue portion 127b adjacent to the tongue portion 127a and the tongue portion 127c also comes into contact with the floor surface M when the suction port body advances, it is possible to prevent resistance from the floor surface from concentrating on the tongue portion 127a and the tongue portion 127c, and the tongue portion 127b is provided for assisting the contact of the contact rotating portion 127 with the floor when the advance and retreat are switched. When the swing gate can smoothly swing only by the tongue portion 127a and the tongue portion 127c and there is no problem in wear and strength, the tongue portion 127b may be omitted or the number thereof may be changed as appropriate.

For the purpose of reducing wear and preventing damage to the floor surface M, the tongue portions 125a, 127b, and 127c may be formed into shapes that are easily brought into contact with the floor surface, such as a curved front end, a thick wall, a spherical shape, and a triangular shape (e.g., reuleaux triangle).

As shown in fig. 19, the movable flapper 120C is provided with a contact rotation portion 129 instead of the contact rotation portion 122 of the first embodiment. The contact rotating portion 129 is composed of a hollow substantially fan-shaped contact portion 129a which contacts the floor surface M to receive resistance from the floor and rotate the movable flap 120c, and a reinforcing rib 129b for adjusting the deflection of the contact portion 129a during the forward and backward operation. Fig. 19 shows a shape in which one reinforcing rib 129b is provided from the center to the circumferential outer side direction, but the shape is not limited to this, and the shape can be freely determined within a range in which the contact portion 129a can be secured to flex during the forward and backward operation of the suction port body, the resistance from the floor can be reduced, the wear of the contact portion can be reduced, and damage such as cracking does not occur.

(second embodiment)

Fig. 20 is a sectional view showing a movable flapper provided in a suction port body according to a second embodiment. Further, fig. 20 shows a state when the mouthpiece 3 retreats. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.

As shown in fig. 20, the movable flapper 120C of the second embodiment has a recess 121f formed in the flapper section 121. The recesses 121f are formed at a plurality of positions at intervals in the axial direction (the left-right direction, the width direction). The concave portion 121f is configured such that the concave surface faces downward when the recess is retracted. The uppermost portion 121t of the concave portion 121f is located below the lowermost surfaces 112a and 113a of the suction port housing 110 (in the vicinity of the suction port 111).

In the second embodiment, the movable flap 120C has a concave portion 121f, and when the suction port casing 110 is retracted, the uppermost portion 121t of the concave portion 121f is located below the lowermost surfaces 112a and 113a (the vicinity of the suction port 111) indicated by the broken lines in the suction port casing 110. Thus, as in the first embodiment, when the suction body 3 advances, the front opening can suck relatively large dust (dirt). Further, when the suction port body 3 retreats, the opening in the front is closed, so that the sealing property with the floor surface M can be secured, and the pressure in the suction port 111 can be increased as compared with the case of advancing. As a result, dust (dirt) can be reliably sucked in.

(third embodiment)

Fig. 21 is a sectional view showing a movable flapper provided in a suction port body according to a third embodiment. Fig. 19 shows a state when the mouthpiece 3 is retracted.

As shown in fig. 21, the movable flap 120D according to the third embodiment is formed such that the lowermost portion 121s of the flap portion 121 is the same as the lowermost surfaces 112a, 113a of the suction port housing 110 (flush with the lowermost surfaces 112a, 113 a). Even in the case of the third embodiment configured as described above, the same effects as those of the first and second embodiments can be obtained.

While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the case where two contact rotating portions 122 and 123 are provided has been described as an example, but the number is not limited to two, and one (for example, one is provided at the center portion in the axial direction), or three or more may be provided. By providing one contact rotation portion, the opening width in front of the suction port 111 can be secured wide, and dust can be easily sucked from the front.

In the above-described embodiment, the movable guard 120 is attached to the front side of the first rotary cleaning element, but the movable guard 120 may be disposed instead of the cleaning brush 140 on the rear side of the rotary brush 130. In this case, when the suction port body is retracted, the movable flapper 120 is opened to take in dust, and when the suction port body is advanced, the movable flapper 120 closes the opening to form airtight. The movable guard 120 may be attached to both the front and rear sides of the first rotary cleaning element 130.

In the second embodiment, the recess 121f is formed in the baffle 121, but instead of the recess 121f, a slit-like notch may be formed. In this case, when the suction port casing 110 is retracted, the uppermost portion of the notch may be positioned at the same level as or below the vicinity of the suction port 111 in the suction port casing 110.

Claims (5)

1. A suction port body of an electric dust collector is characterized in that,

the disclosed device is provided with: a suction port casing having a suction port on a lower surface; and a movable baffle plate of movable type, which is arranged at least one side of the suction port in the front-back direction,

the movable flapper includes: a contact rotation part which rotates by contacting with the floor surface when the suction port casing moves forward and backward; and a baffle part which forms an opening between the baffle part and the floor surface when the baffle part moves forwards and closes the opening when the baffle part moves backwards,

the contact rotation part has a curved surface part at a contact start part with a floor surface and at least one hollow part, and when the suction port casing retreats, the lowest part of the baffle part is the same as or positioned lower than the lowest surface of the suction port casing,

when the suction port casing is retracted, the baffle portion is inclined forward with respect to the vertical direction.

2. The suction port body of the electric vacuum cleaner according to claim 1,

the baffle plate part is provided with a notch or a concave part at the lower part,

when the suction port casing is retracted, the uppermost portion of the notch or the concave portion is the same as or located lower than the lowermost surface of the suction port casing.

3. The suction port body of the electric vacuum cleaner according to claim 1 or 2,

the suction port casing is provided with a cover member detachably attached to the suction port casing,

the shaft portion of the movable flapper is positioned between the suction port housing and the lid member.

4. The suction port body of the electric vacuum cleaner according to claim 1 or 2,

the contact rotation part is formed of a soft member.

5. The suction port body of the electric vacuum cleaner according to claim 3,

the contact rotation part is formed of a soft member.

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