CN111616638A

CN111616638A - Suction port body of electric dust collector and electric dust collector with the same

Info

Publication number: CN111616638A
Application number: CN202010112739.7A
Authority: CN
Inventors: 村松拓哉
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2019-02-28
Filing date: 2020-02-24
Publication date: 2020-09-04
Also published as: JP7198685B2; JP2020137836A

Abstract

Provided are a suction port body of an electric dust collector with excellent walking performance and the electric dust collector with the suction port body. The suction port body of the electric vacuum cleaner is provided with a suction port body and a buffer, wherein the suction port body is provided with a bottom surface opposite to a surface to be cleaned and a suction port arranged on the bottom surface, the buffer is arranged at the front end of the advancing direction side of the suction port body, the suction port body is provided with an inclined surface part which is far away from the surface to be cleaned along with the advancing direction on the front end side of the bottom surface, the buffer is provided with a fixed part and a movable sheet part, the fixed part is fixed at the front end of the suction port body, and the movable sheet part can rotate towards the inclined surface part side and is connected with the fixed part in a suspension mode.

Description

Suction port body of electric dust collector and electric dust collector with the same

Technical Field

The present invention relates to a suction port body of an electric vacuum cleaner and an electric vacuum cleaner having the same.

Background

Generally, a suction port body of a conventional electric vacuum cleaner is provided with a bumper at a front end thereof in order to suppress damage to a wall surface, furniture, and the like.

For example, japanese patent application laid-open No. 7-23882 discloses an inhalation device in which an inhalation port provided at the bottom surface of an inhalation device main body has a side opening portion opened at the front end side, and a pressure receiving member (buffer) provided at the front end of the inhalation device main body has a covering wall covering the side opening portion.

In this suction device, the covering wall covers the side opening portion to reduce the opening area of the side opening portion and suppress a decrease in dust suction force during normal travel on the floor surface, and at the same time, when the pressure receiving member hits the wall surface, the covering wall rotates forward and the side opening portion opens to allow dust on the edge of the wall to be sucked.

Disclosure of Invention

Problems to be solved by the invention

In the case of floor cleaning by the suction device of japanese unexamined patent publication No. 7-23882, when the gap between the cover wall of the pressure receiving member and the floor surface is narrow, the cover wall may be caught by a step such as a mat (carpet, mat) or a threshold laid on the floor surface, and therefore, the user must lift the suction device to ride over the step, which increases the burden on the user. In addition, when the gap between the covering wall of the pressure receiving member and the floor surface is narrow, it is difficult to suck and remove large garbage since the large garbage does not enter the gap.

The present invention has been made in view of the above problems, and an object thereof is to provide a suction port body of an electric vacuum cleaner having excellent traveling performance, and an electric vacuum cleaner including the suction port body.

Means for solving the problems

According to the present invention, there is provided a suction port body of an electric vacuum cleaner, the suction port body including a suction port main body having a bottom surface facing a surface to be cleaned and a suction port provided in the bottom surface, and a bumper provided at a front end of the suction port main body on a side of a forward direction,

the suction inlet body has an inclined surface portion on the front end side of the bottom surface, the inclined surface portion being away from the surface to be cleaned as the inclined surface portion moves in the forward direction,

the damper has a fixed portion fixed to the front end of the suction port body and a movable piece portion rotatable toward the inclined surface portion and joined to the fixed portion in a suspended manner.

Further, according to the present invention, there is provided an electric vacuum cleaner including a cleaner main body and the suction port body connected to the cleaner main body.

Advantageous effects

It is possible to provide a suction port body of an electric vacuum cleaner having excellent traveling performance, or an electric vacuum cleaner having a suction port body of an electric vacuum cleaner having excellent traveling performance.

Drawings

Fig. 1 is a perspective view showing an electric vacuum cleaner including a suction port body according to a first embodiment of the present invention.

Fig. 2 is a front view of the suction port body of the first embodiment.

Fig. 3 is a bottom view of the suction port body of the first embodiment with a part omitted.

Fig. 4 is a perspective view of the suction port body of the first embodiment as viewed from below.

Fig. 5 is a left side view of the suction port body according to the first embodiment, (a) is a left side sectional view of the vicinity of the middle of the left and right sides, and (C) is a left side sectional view of the left end portion side.

Fig. 6 (a) to (F) are views illustrating various side-view shapes of the inclined surface portion of the suction port body according to the first embodiment.

Fig. 7 is a left side sectional view of a part of the damper of the suction port body of the first embodiment in an enlarged manner.

Fig. 8 is a left side sectional view of the suction port body according to the first embodiment, in which a part of the state in which the damper is closed is omitted.

Fig. 9 is a perspective view showing a state where the damper of the suction port body of the first embodiment is closed, as viewed from below.

Fig. 10 is a view for explaining the suction port body of the first embodiment when (a) is before contacting the step, (B) is contacting the step, and (C) is over the step.

Fig. 11 is a left side sectional view of a part of a damper of the suction port body of the second embodiment in an enlarged manner.

Detailed Description

(first embodiment)

(integral constitution of electric vacuum cleaner)

As shown in fig. 1, an electric vacuum cleaner 1 according to a first embodiment is a stick-type electric vacuum cleaner 1, and the stick-type electric vacuum cleaner 1 includes: a cleaner body 10 having a drive device 10A and a dust cup unit 10B, the drive device 10A having an electric blower built therein, the dust cup unit 10B being detachably mounted on the drive device 10A; a battery 20 detachably attached to the drive device 10A; a suction port body 40 having a rotary brush 45 (see fig. 5(B) and (C)) rotationally driven by a rotary brush motor 47; and an extension pipe 30 hermetically connected to the suction port body 40 and the cleaner main body 10.

The electric vacuum cleaner 1 includes an electric wiring unit, not shown, which supplies electric power from the battery 20 to a rotary brush motor 47 provided in the suction port body 40.

In the cleaner body 10, the driving device 10A includes a handle 10Aa held by a hand of a user, an operating portion 10Ab having start and stop switches provided on the handle 10Aa, and a connecting portion 10Ac that receives a proximal end portion of the extension pipe 30 and is detachably connected to the proximal end portion of the extension pipe 30.

The extension pipe 30 has a connection part 30a at a front end thereof, and the connection part 30a receives the connection pipe part 42 of the suction port body 40 and is detachably connected to the connection pipe part 42.

The suction port body 40 includes a suction port main body 41, a connecting pipe portion 42, and a joint portion 43, the connecting pipe portion 42 is detachably inserted into the connecting pipe portion 30a of the extension pipe 30, and the joint portion 43 swings the connecting pipe portion 42 back and forth within an angle range of about 90 degrees with respect to the suction port main body 41 and is capable of twisting left and right within an angle range of about 180 degrees.

In the electric vacuum cleaner 1 having such a configuration, when the start switch of the operation portion 10Ab is turned on (on operation), the electric blower (not shown) and the rotary brush motor 47 are driven (see fig. 5C). Then, the air including the dust flows into the dust cup unit 10B through the extension pipe 30 from the suction port 41aa having the rotating rotary brush 45 (see fig. 5B) of the suction port body 40, and the dust is captured by the dust cup unit 10B and the cleaned air is exhausted from an unillustrated exhaust port on the side surface of the driving device 10A.

(constitution of suction port body)

Fig. 2 is a front view of the suction port body of the first embodiment, fig. 3 is a bottom view of the suction port body of the first embodiment with a part thereof omitted, and fig. 4 is a perspective view of the suction port body of the first embodiment as viewed from below. Fig. 5 is a left side view of the suction port body of the first embodiment (a), (B) is a left side sectional view of the vicinity of the middle of the left and right sides, and (C) is a left side sectional view of the left end portion side. In fig. 2, 3, and 5 (a), the front, rear, left, right, and up-down directions of the suction port body are indicated by arrows.

As shown in fig. 2 to 5 (C), in the suction port body 40, the suction port body 41 includes a lower shell 41a constituting a bottom surface and an upper shell 41b facing the lower shell 41a, and a damper 44 is provided at a tip where the lower shell 41a and the upper shell 41b are joined. Further, with respect to the buffer 44, a description will be specifically made later.

The suction port body 41 includes: a suction port 41aa provided in the lower case 41a (bottom surface) and extending in the left-right direction; a connecting tube 42 connected to the rear of the suction port 41aa via a joint 43; a rotary brush 45 rotatably provided around an axis extending in the left-right direction of the suction port 41 aa; a suction channel 46 connecting the suction port 41aa and the joint unit 43; a rotary brush motor 47 for driving the rotary brush 45; a lift-up detection switch 48 provided at the lower case 41 a; and wheels 49.

The suction port body 41 is provided with an inclined surface portion 41ab (see fig. 10 a) on the front end side of the bottom surface (lower case 41a), and the inclined surface portion 41ab is inclined in a direction to rise along with the direction to advance, that is, in a direction to move away from the surface F to be cleaned along with the direction to advance in a state where the suction port body 41 is placed on the surface F to be cleaned. The suction port 41aa has a front opening 41ac that opens forward. In the present embodiment, although the inclined surface portions 41ab are provided on both the left and right sides of the front opening portion 41ac of the suction port 41aa, for example, the front opening portion 41ac may be formed to have a narrow width in the front-rear direction, or the front edge of the front opening portion 41ac may be formed into a comb shape, so that the inclined surface portions 41ab may be provided continuously at the front position and the left and right positions of the front opening portion 41 ac.

Fig. 6 (a) to (F) are diagrams explaining various side view shape examples of the inclined surface portion of the inlet body. In addition, reference numeral BS in fig. 6 (a) to (F) denotes the bottom surface of the suction port body.

In the suction port body 40 of the present embodiment, the inclined surface portion 41ab includes a structure composed of only the convex curved surface CS shown in fig. 6 (a), a structure composed of only the flat surface FS shown in fig. 6 (B), a structure composed of the upper convex curved surface CS and the lower flat surface FS shown in fig. 6 (C), a structure composed of the upper flat surface FS and the lower convex curved surface CS shown in fig. 6 (D), a structure in which the convex curved surface CS is disposed between the upper flat surface FS and the lower flat surface FS shown in fig. 6 (E), a structure in which the flat surface FS is disposed between the upper convex curved surface CS and the lower convex curved surface CS shown in fig. 6 (F) (fig. 6 (F)), and the like. In addition, various shapes of the inclined surface portion are considered, but a shape suitable for development including (a) to (F) of fig. 6 may be selected.

In the present embodiment, a pair of left and right buffer belts 41ad that slide on the surface F to be cleaned (see fig. 10 a) are provided at left and right positions of the suction port 41aa on the bottom surface of the lower case 41a, specifically, in a range extending from the flat portion of the bottom surface to the left and right inclined surface portions 41 ab. For example, the cushion tape 41ad is made of a fabric such as a nonwoven fabric or a woven fabric. A plurality of (4 in the present embodiment) shaft 44bd support ribs 41ba (see fig. 7) that support a damper 44 described later are provided at the front end of the upper case 41 b.

A timing pulley 50a is attached to an output shaft of the rotating brush motor 47, a timing pulley 50b is attached to a left end portion of the rotating brush 45, and the

timing pulleys

50a and 50b are coupled by a timing belt 51.

Therefore, as described above, when the start switch of the operation unit 10Ab is turned on to start the floor cleaning operation, the dust on the floor surface is cleaned by the rotary brush 45 driven by the rotary brush motor 47, and the dust is transported from the suction port 41aa through the suction flow path 46, the joint unit 43, and the connecting pipe 42 in the direction of the dust cup unit 10B (see fig. 1).

The lift detection switch 48 includes a swing lever portion 48a having a wheel 48b, a switch body (not shown) swingably supporting the swing lever portion 48a, and a torsion coil spring (not shown) biasing the swing lever portion 48a downward. The switch body is connected to a drive circuit board of a motor for a rotary brush housed in the lower case 41a, and the wheel 48b of the swing lever portion 48a is exposed to the outside downward from the lower case 41 a.

According to this configuration, when the suction port body 40 is lifted and separated from the floor surface, the lift detection switch 48 is operated to forcibly stop the driving of the rotary brush motor 47.

(constitution of buffer)

Fig. 7 is a left side sectional view of a part of the damper of the suction port body of the first embodiment enlarged, fig. 8 is a left side sectional view of a part of the closed state of the damper of the suction port body of the first embodiment omitted, and fig. 9 is a perspective view of the closed state of the damper of the suction port body of the first embodiment viewed from below. In fig. 7, the front-rear direction of the suction port body is shown by arrows.

As shown in fig. 2 and 7, the buffer 44 is configured to: the suction port body 41 has a fixed portion 44a fixed to the front end thereof and a movable piece portion 44b connected to the fixed portion 44a so as to be suspended and rotatable toward the inclined surface portion 41ab side, and the movable piece portion 44b is rotated to be retracted into the front opening portion 41ac of the suction port 41 aa. In the case of the present embodiment, the fixed portion 44a and the movable piece portion 44b are constituted by different members.

The fixing portion 44a is a cover member extending in the left-right direction, and a plurality of (4 in the present embodiment) pressing ribs 44aa that press the shafts 44bd of the movable piece portion 44b described later are provided on the inner surface on the opposite side of the outer surface.

Further, projecting portions 44ab projecting forward are provided on both left and right ends of the outer surface of the fixed portion 44 a. When the bumper 44 abuts against a flat wall surface during cleaning by the suction port body 40, the protrusions 44ab easily abut against the wall surface.

The movable piece portion 44b has a length slightly shorter than the length of the front opening portion 41ac of the suction port 41aa in the left-right direction, and reinforcing ribs 44bf are provided at both left and right ends of the lower end edge 44bc, and the reinforcing ribs 44bf protrude rearward in a size thicker than the thickness of the lower end edge 44 bc. The reinforcing rib 44bf reinforces the movable piece portion 44b, and suppresses the suction of air from the left-right direction to maintain the suction force.

As shown in fig. 2 and 7, the movable piece portion 44b has: a plurality of (3 in the present embodiment) protruding pieces 44ba provided at upper end edges extending in the left-right direction; a plurality of (4 in the present embodiment) hole portions 44bb provided on both sides of each protruding piece 44ba of the upper end edge; and a lower end edge 44bc extending in the left-right direction. By inserting the respective support ribs 41ba of the upper case 41b into the respective hole portions 44bb of the movable piece portion 44b, the movable piece portion 44b is rotatably supported by the respective support ribs 41ba about the respective shafts 44 bd. The movable piece portion 44b rotatably presses the shafts 44bd via the pressing ribs 44aa of the fixed portion 44 a. That is, the vicinity of each hole 44bb at the upper end edge becomes the shaft 44 bd. The shafts 44bd are arranged on the same axial center in the left-right direction.

The damper 44 further includes a biasing member 44c that biases the movable piece portion 44b rotatably about the respective shafts 44 bd. In the case of the present embodiment, the compression coil springs as the urging members 44c are positioned between the respective projecting pieces 44ba of the movable piece portion 44b and the fixed portion 44 a.

Thus, the movable piece portion 44b is biased by the biasing member 44c in a direction in which the lower end edge 44bc is rotated forward, that is, the outer surface 44be of the lower end edge 44bc is biased in a direction in which the sheet advances. Further, each protruding piece 44ba abuts on the upper case 41b, and thereby the movable piece portion 44b is restricted from rotating forward of the lower end edge 44 bc. At this time, the outer surface 44be of the lower end edge 44bc of the movable piece portion 44b preferably does not protrude forward beyond the left and right protrusions 44ab of the outer surface of the fixed portion 44 a.

Instead of the compression coil spring, a porous elastic foam may be used as the biasing member 44 c. Alternatively, a tension coil spring that rotates the lower end edge 44bc forward by biasing the protruding piece 44ba rearward may be used. Alternatively, shafts may be provided at both ends of the movable piece portion 44b in the longitudinal direction, a torsion spring may be attached to at least one of the shafts, and the lower end edge 44bc may be biased by the torsion spring in a direction of rotating forward.

As shown in fig. 7 to 9, when the outer surface 44be of the lower end edge 44bc of the movable piece portion 44b is pressed rearward, the projecting pieces 44ba of the movable piece portion 44b rotate forward about the shaft 44bd against the biasing force of the biasing member 44c, and the lower end edge 44bc rotates rearward about the shaft 44 bd. Thereby, the lower end edge 44bc is retracted into the front opening 41ac of the suction port 41 aa. At this time, the outer surface 44be of the lower end edge 44bc is arranged in substantially the same plane as the cushion zone 41ad of the right and left inclined surface portions 41 ab. In this case, the left and right cushion bands 41ad are configured as a part of the left and right inclined surface portions 41 ab. That is, since the cushion strips 41ad are provided along the left and right inclined surface portions 41ab of the various side view shapes shown in fig. 6 (a) to (F), the outer surfaces of the cushion strips 41ad and the inclined surface portions 41ab have the same various side view shapes, and the outer surface 44be of the lower end edge 44bc of the movable piece portion 44b is disposed in the substantially same plane as the outer surface of the cushion strips 41ad of the various side view shapes.

The left and right cushion bands 41ad may be omitted. In this case, when the lower end edge 44bc of the movable piece portion 44b is retracted into the front opening 41ac of the suction port 41aa, the outer surface 44be of the lower end edge 44bc is preferably arranged in substantially the same plane as the left and right inclined surface portions 41ab in various side view shapes.

For example, when the floor surface (surface F to be cleaned) on which the carpet C is laid is cleaned by the suction port body 40, as shown in fig. 10 (a) and (B), if the height of the step S of the carpet C is lower than the fixing portion 44a of the bumper 44 of the suction port body 40 on the floor surface, the suction port body 40 can ride over the step S.

At this time, as shown in fig. 7 to 9 and fig. 10 (B), the outer surface 44be of the lower end edge 44bc of the movable piece portion 44B is pressed into the front opening portion 41ac while colliding with the step S, and the outer surface 44be of the lower end edge 44bc and the cushion tape 41ad of the right and left inclined surface portions 41ab are arranged in substantially the same plane as each other. Therefore, when the suction port body 40 that collides with the step S is advanced, as shown in fig. 10 (C), the buffer 44 is not caught by the step S, and the suction port body 40 can smoothly cross the step S.

Further, as shown in fig. 10 (B). In a state where the outer surface 44be of the lower end edge 44bc of the movable piece portion 44b is pressed into the front opening 41ac by hitting against the step S, dust accumulated in the corner N can be efficiently sucked and removed in order to approach the front opening 41ac of the suction port body 40 facing the corner N between the step S and the surface F to be cleaned.

(second embodiment)

Fig. 11 is a left side sectional view of a part of a damper of the suction port body of the second embodiment in an enlarged manner. In fig. 11, the same elements as those in fig. 7 are denoted by the same reference numerals.

The suction port body of the second embodiment is substantially the same as the first embodiment except that the configuration of the damper is different from that of the first embodiment.

Hereinafter, differences between the second embodiment and the first embodiment will be mainly described.

As shown in fig. 11, in the suction port body 140 of the second embodiment, the movable piece portion 144b of the damper 144 has flexibility at least at a portion connected to the fixed portion 144 a. In the present embodiment, the movable piece portion 144b is flexible as a whole.

For example, the bumper 144 may be formed by insert molding using resin for the fixing portion 144a and rubber for the movable piece portion 144 b. Further, the damper may be formed as one component using rubber only at the connecting portion between the fixed portion 144a and the movable piece portion 144b, and resin insert molding may be used for the other portions. In addition, the entire movable piece portion 144b may be integrally molded from a flexible material.

In the case of the second embodiment, the fixing portion 144a has the catching and supporting rib 144a at the inner surface, and the upper case 141b has the catching and supporting rib 141ba at the front end. The fixing portion 144a is mounted to the front end of the upper case 141b by the catching and supporting rib 144a catching and supporting rib 141 ba.

With the damper 144 thus configured, when the lower end edge 144bc of the movable piece portion 144b is pressed rearward, the connecting portion of the movable piece portion 144b with the fixed portion 144a is elastically deformed, and the lower end edge 44bc is rotated rearward as indicated by the two-dot chain line. Thus, the outer surface 144be of the lower edge 144bc is arranged in substantially the same plane as the cushion belt 41ad of the right and left inclined surface portions 41ab while the lower edge 144bc is retracted into the front opening of the suction port 41 aa. Therefore, the suction port body 140 of the second embodiment can smoothly span the step S on the surface F to be cleaned (see fig. 10 (a) to (C)) as in the first embodiment.

(third embodiment)

Although the first and second embodiments have illustrated the suction port body having the motor-driven rotary brush, the suction port body may be a turbine-driven suction port body or may be a suction port body having no rotary brush.

(fourth embodiment)

Although the fourth embodiment illustrates the suction port body used for the stick type electric vacuum cleaner (see fig. 1), the suction port bodies of the first to third embodiments may be used for a canister type electric vacuum cleaner.

(other embodiments)

In the suction port bodies of the first and second embodiments, the configuration in which the inclined surface portion inclined in a direction away from the surface to be cleaned as it goes forward is integrated with the floor surface in a state in which the suction port body is placed on the surface to be cleaned is exemplified, but the inclined surface portion may be configured as a member different from the bottom surface.

(conclusion)

The suction port body of the electric dust collection of the invention comprises a suction port main body and a buffer, wherein the suction port main body is provided with a bottom surface opposite to a surface to be cleaned and a suction port arranged on the bottom surface, the buffer is arranged at the front end of the suction port main body in the advancing direction,

According to this configuration, when the movable piece portion is pressed against a step such as a floor mat (carpet, mat, or the like) or a threshold laid on the floor surface when the floor surface is cleaned by the suction port body, the movable piece portion is rotated (retracted) toward the inclined surface portion side. An inclined surface portion is provided on the bottom surface of the suction port body at a position forward of the suction port. This reduces the burden on the user, and the suction port body can be lifted up and moved over the step because the movable piece portion of the damper and the tip of the suction port body are not caught by the step and the suction port body can move over the step.

The suction port body of the electric vacuum cleaner of the present invention may have the following configuration, or may be an appropriate combination of these configurations.

The suction port may have a front opening that opens forward, and the movable piece may be rotated to retract into the front opening.

According to this configuration, when the movable piece portion of the bumper is suspended from the fixed portion, the opening area of the front opening portion of the suction port (the gap between the movable piece portion and the floor surface) is narrowed, so that the suction property is maintained. When sucking in garbage (large garbage) larger than the gap between the movable piece and the floor surface, the suction port body is advanced toward the large garbage, and the movable piece of the bumper pressing the large garbage is retracted into the front opening, so that the large garbage can be sucked into the suction port.

The movable sheet has an outer surface facing in the direction of advance,

the movable piece may be rotated to retract into the front opening, and the outer surface may be disposed in substantially the same one surface as the inclined surface.

According to this configuration, the pressure applied to the step side of the suction port body when the step is stepped can be dispersed between the inclined surface portion of the suction port body and the outer surface of the movable piece portion of the damper, and therefore the suction port body can smoothly step over even a mat (step) having a large advancing resistance.

The movable piece portion may also be rotatably pivotally connected to the fixed portion via a shaft.

According to this configuration, the fixed portion and the movable piece portion are formed as separate members, and the damper can be obtained by combining them.

Further comprises a biasing member for biasing the movable plate portion to be rotatable about the shaft,

the movable piece portion may also be urged in a direction in which the outer surface faces the advancing direction by the urging member.

According to this configuration, the movable piece portion of the damper pressed by the step when the suction port body moves over the step rotates rearward against the biasing force of the biasing member, and the movable piece portion automatically returns to the initial position forward by the biasing member when moving over the step.

The movable piece portion may have flexibility at least at a portion connected to the fixed portion.

According to this configuration, the damper in which the fixed portion and the movable piece portion are integrally formed can be obtained.

A pair of left and right buffer belts that slide on the surface to be cleaned may be provided on the bottom surface in a range that extends from left and right positions of the suction port to the inclined surface portion.

According to this configuration, when the suction port body cleans the wooden floor as the surface to be cleaned, damage to the surface to be cleaned such as the wooden floor and a collision sound when the suction port body collides with the wooden floor can be suppressed by the buffer tape. In addition, since the pair of left and right buffer belts extend from the left and right positions of the suction port to the inclined surface portion of the bottom surface, the buffer belts are less likely to be caught by the step when the suction port body moves over the step.

Furthermore, the disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is indicated not by the above description but by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the claims.

Claims

1. A suction port body of an electric vacuum cleaner is characterized by comprising a suction port main body and a buffer, wherein the suction port main body is provided with a bottom surface opposite to a surface to be cleaned and a suction port arranged on the bottom surface, the buffer is arranged at the front end of the front direction side of the suction port main body, the suction port main body is provided with an inclined surface part which is far away from the surface to be cleaned along the front direction on the front end side of the bottom surface,

the damper has a fixed portion fixed to the front end of the suction port body and a movable piece portion rotatable toward the inclined surface portion side and joined to the fixed portion in a suspended manner.

2. The suction inlet body according to claim 1, wherein the suction inlet is configured to have a front opening portion that opens in a front direction,

and the movable piece portion rotates and retreats into the front opening portion.

3. The suction port body according to claim 2, wherein said movable sheet portion has an outer surface facing in said advancing direction,

the movable piece is rotated and retracted into the front opening, and the outer surface is disposed in substantially the same one surface as the inclined surface.

4. The suction port body according to any one of claims 1 to 3, wherein said movable sheet portion is rotatably pivotally connected to said fixed portion via a shaft.

5. The suction port body as set forth in claim 3, wherein said movable sheet portion is rotatably pivotally connected to said fixed portion via said shaft,

the movable piece portion is urged in a direction in which the outer surface faces a forward direction by the urging member.

6. The suction port body according to any one of claims 1 to 3, wherein said movable sheet portion is flexible at least at a portion connected to said fixed portion.

7. The suction port body according to any one of claims 1 to 6, wherein a pair of left and right cushion belts which are in sliding contact with a surface to be cleaned are provided in a range of the bottom surface from left and right positions of the suction port across the inclined surface portion.

8. An electric vacuum cleaner comprising a cleaner main body and the suction port body according to any one of claims 1 to 7 connected to the cleaner main body.