JP2015198891A - Suction port body and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction port body and a vacuum cleaner capable of sucking dust without damaging a cleaning face.SOLUTION: A suction port body 105 comprises a suction space 135 inside thereof, a head part 127 having a suction port on a side opposing a cleaning face, and a ventilation path 129 connected to the head part 127 and having inside thereof, a ventilation space 137 communicating with the suction space 135 via a ventilation port 143. The suction space 135 communicates with outside of the head part 127 via the suction port, and has a truncated circular shape or a truncated oval shape in which a portion closer to a cleaning face side than the suction port that exists between a central axis of a circular shape or an oval shape and the cleaning face, in the circular shape or the oval shape contacting with the cleaning face is truncated in a cross section perpendicular to a parallel direction. An area of a cross section in the suction space 135 is constant along the parallel direction.

Description

  The present invention relates to a suction port body and a vacuum cleaner including the suction port body.

Conventionally, various studies have been made to improve the dust suction performance on floors and carpets. For example, the suction inlet body of the vacuum cleaner of a structure like patent document 1 is disclosed.
According to the configuration of the suction port body disclosed in Patent Document 1, the rotating brush is provided inside the suction port provided on the cleaning surface side of the suction port body. At the time of cleaning, this rotating brush rotates to scrape dust on the cleaning surface, and sucks the place where the dust is floating through the suction port. In this way, the performance of the suction port body is improved by sucking the dust in the floor groove and the dust existing in the back of the carpet.

  In addition to the suction port body, a rotary brush provided with a rubber blade in addition to the brush, and a suction port body provided with a plurality of rotary brushes are disclosed.

JP-A-5-293064

However, in order to scrape the dust by rotating the rotating brush, it is necessary to bring the rotating brush into contact with the floor or the carpet. This is because the rotating brush lifts dust by scratching the cleaning surface directly. In such a method, since the rotating brush is directly brought into contact with the cleaning surface, there is a high possibility that the floor and the carpet will be damaged, and depending on the material, there is a possibility that the hair of the carpet is damaged.
The present invention provides a suction port body and a vacuum cleaner that can suck dust without damaging the cleaning surface.

  In order to solve the above-described problems, in an embodiment according to the present invention, a head portion having a suction space inside and having a suction port on a side facing the cleaning surface, and connected to the head portion and via a ventilation port. A suction port body having a ventilation space communicating with the suction space, the suction space extending in a direction parallel to the cleaning surface, and the suction port is The suction space is located between the central axis of the suction space and the cleaning surface, and the suction space communicates with the outside of the head portion via the suction port, and in a cross section orthogonal to the parallel direction, In a circular shape or similar circular shape in contact with the cleaning surface, a missing circular shape or a defective circular shape lacking the cleaning surface side from the suction port present between the center of the circular shape or similar circular shape and the cleaning surface In the suction space Area of the cross section, said constant along parallel directions.

The similar circular shape here is not a perfect circular shape, but a shape belonging to a type corresponding to a circular shape, for example, an elliptical shape, an elliptical shape, a polygonal shape, an elliptical shape, an elliptical shape. There are a shape, a shape in which a part of the polygonal shape is recessed or protruded.
Moreover, the vacuum cleaner which concerns on this invention is equipped with a suction inlet body and a cleaner main body, and the said suction inlet body is a suction inlet body as described above.

  In the embodiment according to the present invention, since the cross-sectional shape of the suction space is not a circle shape or a notch circle shape, a swirling airflow is generated in the suction space, and the swirling airflow winds up dust on the floor or carpet. Thus, it is possible to improve the suction efficiency.

The top view and sectional drawing which represented the inlet port for demonstrating an operation principle typically. The side view which represented typically the suction inlet for demonstrating an operation principle. Schematic of the vacuum cleaner of 1st Embodiment. The side view of the suction inlet of 1st Embodiment. The top view of the suction inlet of 1st Embodiment. The bottom view of the suction inlet of 1st Embodiment. The front view of the suction inlet of 1st Embodiment. The rear view of the suction inlet body of 1st Embodiment. FIG. 6 is an enlarged view of a periphery of a cylindrical body when the X1-X1 cross section of FIG. The perspective view of the suction inlet of 2nd Embodiment. The top view of the suction inlet of 2nd Embodiment. The bottom view of the suction inlet of 2nd Embodiment. The figure which looked at the X11-X11 line cross section of FIG. 11 from the arrow direction. The figure which looked at the X12-X12 line cross section of FIG. 13 from the arrow direction. The figure which looked at the X13-X13 line cross section of FIG. 13 from the arrow direction. The exploded view of the components downstream from the communication part. The expansion cross-sectional view of the suction head of 2nd Embodiment. The expanded cross-sectional view which shows the modification of a suction head.

  A suction port body according to an aspect of the present invention includes a head portion having a suction space therein and a suction port on a side facing a cleaning surface, and the suction port body connected to the head portion and via the ventilation port. A suction port body of a vacuum cleaner having a ventilation path communicating with the space inside, wherein the suction space extends in a direction parallel to the cleaning surface, and the suction port is the suction port The suction space is located between the central axis of the space and the cleaning surface, and the suction space communicates with the outside of the head portion via the suction port, and in a cross section orthogonal to the parallel direction, In a circular shape or a similar circular shape that is in contact with each other, a circular shape or a defective circular shape that lacks the cleaning surface side from the suction port that exists between the center of the circular shape or a similar circular shape and the cleaning surface, In the cross section in the suction space Product is said is constant along the parallel direction. As a result, a swirling airflow is generated in the suction space.

Moreover, the said ventilation path is the center part of the direction where the said suction space extends | stretches, and is connected to the said head part. Accordingly, a swirling airflow is generated on both the left and right sides of the suction space with respect to the ventilation path, and the swirling airflow can be used in a wide range.
The vent hole has a long flat shape in the parallel direction. Thereby, a ventilation path can be reduced in size. Moreover, the suction space long in the parallel direction can be used effectively.
In addition, the suction space communicates with the outside by a defect portion formed in the end wall of the head portion in the parallel direction and extending along the parallel direction. Thereby, the swirl | vortex airflow which generate | occur | produced in the edge part of suction space can be moved to a ventilation port by a spiral track.

<Operating principle>
The operation principle of the embodiment according to the present invention will be described with reference to FIGS.
1 and 2 show a suction port body 20 of a vacuum cleaner schematically shown for explaining the operating principle of the present invention. FIG. 1 is a top view and a cross-sectional view of the suction port body 20, and FIG. 2 is a side view of the suction port body 20.

First, on the basis of the operator who operates the vacuum cleaner, the side where the suction port is present is referred to as “front side”, and the side where the vacuum cleaner body is present is referred to as “rear side”.
In both FIG. 1A and FIG. 1B, the left side of the drawing corresponds to the front, and the right side corresponds to the rear. Moreover, the arrow shown in FIG.1 (b) represents the motion direction of the swirl | vortex airflow which swirls within the cylindrical body 22, the black arrow represents the lower half side of the swirl airflow, and the hatched arrow represents the upper half side of the swirl airflow. .

The suction port body 20 is a cylindrical or columnar space and has a cylindrical body 22 having an opening 22a on the cleaning surface S side, and a front guard 24 provided in front of the cylindrical body 22 so as to be in contact with the cylindrical body 22. A rear guard 26 provided in contact with the cylindrical body 22 at the rear portion of the cylindrical body 22, and a ventilation path 28 provided at the upper center of the rear guard 26 and communicating with the cylindrical body 22.
Here, the cylindrical body corresponds to the head portion of the present invention, the internal space corresponds to the suction space of the present invention, and the opening corresponds to the suction port of the present invention. Further, the space inside the ventilation path corresponds to the ventilation space of the present invention.

The lower surfaces of the front guard 24 and the rear guard 26 are separated from the cleaning surface S by a fixed distance t. The distance t is the distance between the front guard 24 and the cleaning surface S or the rear guard 26 and the cleaning when the inner peripheral surface of the cylinder is in contact with the cleaning surface, assuming that the cylindrical body 22 is a complete cylinder. This is the distance from the surface S.
In other words, the distance t is the front guard 24 and the cleaning surface S or the rear guard 26 and the cleaning surface S when the distance between the central axis of the cylindrical body 22 and the cleaning surface S corresponds to the radius of the cylindrical body 22. And the distance.

When the distance t is determined in this way, dust sucked (sucked) from the opening 22 a is sucked into the cylindrical body 22 from the tangential direction of the cylindrical body 22. At this time, the airflow in the cylindrical body 22 generates a swirling airflow along the inner surface of the cylindrical body 22.
The behavior of the dust sucked from the opening 22a differs depending on the sucked position. Dust sucked from the central portion of the opening 22a (cylindrical body 22) is directly sucked into the ventilation path 28 without turning inside the cylindrical body 22 because the ventilation path 28 is close.

On the other hand, the dust sucked from the end portion of the cylindrical body 22 rides on the swirling air current and rotates (turns) along the inner peripheral surface of the cylindrical body 22 as shown in FIG. It approaches the center and is sucked into the ventilation path 28.
In other words, as shown in FIG. 1A, the dust sucked from the end of the cylindrical body 22 moves toward the ventilation path 28 while drawing a spiral trajectory along the inner peripheral surface of the cylindrical body 22.

  Next, the distance t between the cleaning surface S and the lower surface of the front guard 24 or the cleaning surface S and the lower surface of the rear guard 26 and the opening size d (the opening size in the front-rear direction) of the opening 22a of the cylindrical body 22 are shown in FIG. Will be described. In FIG. 2, the cylindrical body 22, the front guard 24, and the rear guard 26 are integrally illustrated, and the opening portion of the integral body is also an opening portion of the cylindrical body.

As shown in FIG. 2, the opening size d of the opening 22a is equal to twice one of the adjacent sides of the right triangle OAB having the radius r as the hypotenuse. Therefore, it can be obtained by the following formula.
^{d = 2 × {r 2 -} (r-t) 2} 1/2
Here, d is the opening size of the opening 22a of the cylindrical body 22, r is the radius of the inner peripheral surface of the cylindrical body 22, and t is the distance from the opening 22a to the cleaning surface S.

  If the distance t is decreased while the radius r is constant from the mathematical formula, the opening size d is reduced, and if the distance t is increased, the opening size d is increased. The opening size d can be selected from the range of 0 <d <2r, and an appropriate size is selected based on the performance required for the suction port body 20.

<First Embodiment>
Next, a first embodiment will be described with reference to FIGS.
<Outline of vacuum cleaner>
FIG. 3 is a schematic diagram illustrating the electric vacuum cleaner 1 according to the first embodiment.
As shown in FIG. 3, the electric vacuum cleaner 1 includes an electric vacuum cleaner main body 3 and a suction port body 40. The vacuum cleaner 1 may include a connecting pipe 7 for detachably connecting the vacuum cleaner body 3 and the suction port body 40.

  Here, the connecting pipe 7 includes a hose 11 with an operation unit 9 and a pipe body 13 that can be connected. In addition, the hose 11 and the suction inlet body 40 can also be directly connected, without connecting the pipe body 13 and the suction inlet body 40 so that it can respond to the various use purposes of the vacuum cleaner 1. FIG.

  The vacuum cleaner 1 sucks dust existing on a cleaning surface such as flooring, carpets, carpets, and the like together with ambient air from an opening 42a (also referred to as a suction port) 42a of the cylindrical body 42 and collects the dust inside the vacuum cleaner body 3. Dust. Here, a flow path through which dust or the like is sucked from the suction port of the suction port body 40 to the inside of the electric vacuum cleaner main body 3 is defined as a suction path. In the suction path, the “side” where the suction port body 40 is located is “upstream”, and the “side” where the vacuum cleaner main body 3 is located is “downstream”.

  The electric vacuum cleaner main body 3 incorporates an electric blower for sucking dust and the like, and a dust collection space arranged on the upstream side of the electric blower. The dust collection method may be a cyclone type, a paper pack type, or a combination of both. In addition, the vacuum cleaner main body 3 has wheels 15 for movement assistance.

  The hose 11 is composed of a flexible tubular body having flexibility. A downstream end portion of the hose 11 is detachably connected to the electric vacuum cleaner main body 3, and an operation portion 9 is attached to the upstream end portion. The inside of the hose 11 is a space that constitutes a part of the suction path, and is also a storage space in which an electric cable for operating a switch for starting and stopping suction of the vacuum cleaner body 3 is operated by the operation unit 9. is there.

  In addition to the above switches, the operation unit 9 includes a handle 9a for the operator to move (operate) the suction port body 40 along the cleaning surface. The tube 13 is detachably connected to the upstream end of the operation unit 9.

  The tube body 13 is configured to be extendable. Specifically, the tube body 13 includes an inner tube and an outer tube, and the inner tube is supported so as to be insertable / removable with respect to the outer tube. An upstream end portion of the tube body 13 is detachably connected to the suction port body 40. In addition, since the suction inlet body 40 mentioned later is not provided with a rotating brush, the wiring for rotating brush drive is unnecessary, and the structure of the pipe body 13 becomes simple.

<Outline of suction port>
The configuration of the suction port body 40 will be described.
FIG. 4 is a side view of the suction port body 40. FIG. 5 is a plan view of the suction port body 40. FIG. 6 is a bottom view of the suction port body 40. FIG. 7 is a front view of the suction port body 40. FIG. 8 is a rear view of the suction port body 40.
The suction port body 40 includes at least a cylindrical body 42 and a ventilation path 48. A combination of the cylindrical body 42 and the ventilation path 48 is a suction head. The cylindrical body corresponds to the head portion of the present invention.

The suction port body 40 according to the first embodiment includes a cylindrical body 42, a front guard 44, a rear guard 46, a ventilation path 48, a joint 50, a first pipe 2, a second pipe 54, a base portion 56, and wheels 58a to 58a. 58 f and connected to the vacuum cleaner body 3 via the tube 13 and the hose 11. The second pipe 54 is connected to the tube body 13.
Dust sucked from the opening 42 a formed in the cylindrical body 42 is sucked into the dust collection space provided in the electric vacuum cleaner main body 3 incorporating the electric blower via the tube body 13 and the hose 11. The opening corresponds to the suction port of the present invention.

  The cylindrical body 42 has a columnar space inside, and an opening 42a is formed on the cleaning surface side. As described in the operation principle, the dust sucked from the opening 42a is sucked by a swirling airflow along the inner peripheral surface of the cylindrical body 42.

  The front guard 44 is provided at the front portion of the cylindrical body 42. By providing the front guard 44, the cylindrical body 42 can be protected from an impact even when the suction port body 40 hits a wall or the like during use.

  The front guard 44 is preferably made of a material or a structure capable of absorbing an impact. For example, materials such as elastomer and fiber fabric may be used. Further, the front guard 44 may be formed integrally with the cylindrical body 42 or may be constituted by a plurality of parts.

  The rear guard 46 is provided at the rear part of the cylindrical body 42. Similar to the front guard 44, the rear guard 46 is provided to prevent the cylindrical body 42 from directly hitting an obstacle when the suction port body 40 is moved rearward.

  The rear guard 46 can be made of a material and a configuration that can absorb an impact in the same manner as the front guard 44. For example, a material or configuration that can absorb impact may be used. Specifically, materials such as elastomers and fiber fabrics can be used. Further, the rear guard 46 may be formed integrally with the cylindrical body 42 or may be constituted by a plurality of parts.

  The ventilation path 48 is connected to the center of the rear part of the cylindrical body 42 via a communication part 48a. The dust sucked from the cylindrical body 42 moves in the ventilation path 48 along the suction airflow toward the first pipe 52. In addition, a communicating part is corresponded to the ventilation port of this invention.

  The joint 50 connects the ventilation path 48 and the first pipe 52. The first pipe 52 is connected to be rotatable in the vertical direction about an axis parallel to the longitudinal direction of the cylindrical body 42.

  The first pipe 52 is formed in a substantially cylindrical shape. A pipe cover 52 a is provided on the first pipe 52. The pipe cover 52a is provided with a space where terminals and conductors can be stored. For example, when a light emitting element such as an LED is disposed in the suction port body 40, the pipe cover 52a is used when electrical wiring is required for the suction port body 40. It is possible to use the space inside. If no electrical wiring is required, the pipe cover 52a may be omitted.

  One of the second pipes 54 is connected to the first pipe 52, and the tube body 13 is connected to the other. The second pipe 54 is formed in a substantially cylindrical shape like the first pipe 52, and has a diameter slightly smaller than the diameter of the first pipe 52.

  With such a configuration, a step 54a is formed at the connection portion between the first pipe 52 and the second pipe 54, and the tubular body 13 is fixed at a fixed position when inserted by the step 54a. In addition, the 1st pipe 52 and the 2nd pipe 54 may be formed separately, or may be formed integrally. What is integrally formed is the joint body 125 of the second embodiment.

  The base part 56 is provided in the lower part of the joint 50. With this configuration, by supporting the joint 50 formed slightly above and rearward from the cylindrical body 42 from below, the opening 42a is prevented from floating from the cleaning surface, and a certain distance between the cleaning surface and the opening 42a. Can be maintained.

The wheels 58a to 58f are rotatably attached to predetermined positions such as the front guard 44, the rear guard 46, and the base portion 56. The wheels 58a, 58b are attached to the lower part of the front guard 44, the wheels 58c, 58d are attached to the lower part of the rear guard 46, and the wheels 58e, 58f are attached to the lower center part of the base part 56.
Since the wheels 58c and 58d are attached to the rear guard 46 having a small thickness, the rear guard 46 is attached with a through hole.

<Cylinder>
FIG. 9 is an enlarged view of the periphery of the cylindrical body 42 when the X1-X1 cross section of FIG.
As shown in FIG. 9, the cylindrical body 42 is a part (lower part) of a complete cylindrical body having a circular shape in a cross section (transverse cross section) orthogonal to the central axis Y1 passing through the center P1 of the cylindrical body 42. It has an oval shape lacking. In addition, the opening part 42a is comprised by the part which circular shape lacked.

  The cross-sectional shape and the cross-sectional area of the suction space 43 inside the cylindrical body 42 are the same over the entire length in the direction in which the central axis Y1 of the cylindrical body 42 extends (referred to as the central axis direction). That is, the shape and area in the cross section of the suction space 43 do not change even if the central axis direction moves from one end to multiple ends. Note that the end of the cylindrical body 42 in the central axis direction is closed by the end wall 60.

<Ventilation path>
As shown in FIG. 9, the ventilation path 48 has a cylindrical shape. The ventilation path 48 has a shape that becomes narrower as it is away from the cylindrical body 42 when viewed from above (that is, in the state shown in FIG. 5). Further, the ventilation path 48 is shaped so as to become thicker as it is away from the cylindrical body 42 when viewed from the side (that is, in the state shown in FIG. 4).

  The ventilation path 48 has a ventilation space 62 having a similar shape corresponding to the external shape of the ventilation path 48. The area of the cross section of the ventilation space 62 on the entrance side of the ventilation path 48 is substantially equal to the area of the cross section of the ventilation space 62 on the exit side.

<Connection between cylindrical body and ventilation path>
As shown in FIGS. 6 and 9, the communication portion 48 a that communicates the inside of the cylindrical body 42 with the inside of the ventilation path 48 has a long shape along the central axis direction of the cylindrical body 42. That is, the communication part 48a has a flat shape that is thin in the vertical direction.
As shown in FIG. 9, the communication portion 48 a is present behind the imaginary line segment Y <b> 2 passing through the central axis Y <b> 1 of the cylindrical body 42 and orthogonal to the cleaning surface in the cross section of the cylindrical body 42. The communication part 48a passes through the central axis Y1 of the cylindrical body 42 and exists above the virtual line segment Y3 parallel to the cleaning surface (in a direction away from the cleaning surface).

<Action>
The suction port body 40 of the first embodiment sucks air from the opening 42a from the tangential direction of the cylindrical body 42. Therefore, a swirling airflow is generated inside the cylindrical body 42, and dust on the cleaning surface follows the swirling airflow. The inside of the cylindrical body 42 moves to the ventilation path 48 while drawing a trajectory spirally.

<Second Embodiment>
The suction inlet 105 according to the second embodiment will be described with reference to FIGS. 10 to 17. In addition, the connection structure and the connection method to the vacuum cleaner main body 3 of the suction inlet body 105 are the same as 1st Embodiment here, and description of a connection structure etc. is abbreviate | omitted.
1. FIG. 10 is a perspective view of the suction port body 105, FIG. 11 is a plan view, and FIG. 12 is a bottom view. FIG. 13 is a cross-sectional view taken along the line X11-X11 in FIG. FIG. 14 is a cross-sectional view taken along the line X12-X12 of FIG. FIG. 15 is a cross-sectional view taken along the line X13-X13 of FIG. FIG. 16 is an exploded view of components on the downstream side of the communication portion. FIG. 17 is an enlarged cross-sectional view of the suction head 121.

  Here, the direction orthogonal to the front-rear direction (see FIG. 10) when viewed from the operator facing the suction port body 105 is simply referred to as “left-right direction” (see FIG. 10). Further, the direction orthogonal to the cleaning surface 120 is simply referred to as “vertical direction”, the direction away from the cleaning surface 120 is “upward”, and the direction approaching the cleaning surface 120 is “downward”.

  The suction port body 105 has a suction head 121. The suction head 121 corresponds to the cylindrical body 42 and the ventilation path 48 of the first embodiment. The suction head 121 is provided with a suction port 122. The suction port 122 corresponds to the opening 42a of the first embodiment.

The downstream end portion of the suction head 121 is connected to the joint body 125 through the joint 123. The joint body 125 corresponds to a structure in which the first pipe 52 and the second pipe 54 of the first embodiment are connected.
In addition, the suction inlet body 105 which concerns on 2nd Embodiment says that the suction head 121 and the coupling body 125 were connected by the joint 123, and were integrated.

  As shown in FIG. 13, the suction port body 105 has a suction passage 126 inside. By this suction passage 126, dust or the like on the cleaning surface 120 sucked from the suction port 122 of the suction head 121 is sent from the joint body 125 to the tube body 13 (not shown). The suction port 122 of the suction head 121 serves as the inlet of the suction passage 126, and the downstream port 124 of the joint body 125 serves as the outlet of the suction passage 126.

2. Configuration of Each Part (1) Suction Head The suction head 121 has a head part 127 and a ventilation part 129. The head part 127 is located on the upstream side of the suction head 121, and the ventilation part 129 is located on the downstream side of the suction head 121. The suction port 122 exists on the lower surface of the suction head 121 and faces the cleaning surface 120. The suction head 121 according to this embodiment includes a base portion 131 in addition to the head portion 127 and the ventilation portion 129.

  The head portion 127 has a suction space 135 inside. The ventilation portion 129 has a ventilation space 137 inside. The suction space 135 and the ventilation space 137 communicate with each other and constitute a part of the suction path 126.

(1-1) About suction path The suction path 126 in the suction head 121 is comprised from the suction space 135 and the ventilation space 137 as mentioned above.
As shown in FIGS. 12 and 13, the suction space 135 has a column shape extending along the cleaning surface 120 in a direction parallel to the cleaning surface 120. The parallel direction here is, for example, the left-right direction as shown in FIG. The suction space 135 communicates with the outside of the head portion 127 via the suction port 122 as shown in FIG.

  The suction space 135 has a space shape in which a swirling airflow is generated with the axis extending in the left-right direction as a swirling axis. In other words, the head portion 127 has a suction recess (135) for generating a swirling airflow. The suction recess 135 is recessed from the suction port 122 to the side opposite to the cleaning surface 120.

  As shown in FIG. 13, the specific shape of the suction space 135 is a circular shape as a whole in a cross-section, and lacks the lower side (on the cleaning surface 120 side) with respect to the suction port 122. It has a circular shape.

  A similar circular shape refers to a shape similar to a circular shape. The similar circular shape in the second embodiment is an elliptical shape that is slightly longer in the vertical direction in which a swirling airflow can be generated. An incomplete circle shape refers to a shape that lacks a portion of the similar circle shape.

  The head portion 127 has the suction space 135 so that the contour line of the suction space 135 having a similar circular shape is in contact with the cleaning surface 120 or a virtual surface parallel to the cleaning surface 120 in the vicinity above the cleaning surface 120.

  As shown in FIG. 13, the suction port 122 exists between the center P <b> 11 of the suction space 135 and the cleaning surface 120 in the cross section of the head portion 127. The opening edge of the suction port 122 exists in a plane substantially parallel to the cleaning surface 120. Note that an imaginary line segment that passes through the center P11 of the suction space 135 in the cross section and extends in the left-right direction is defined as a central axis Y11 of the suction space 135 (see FIG. 13).

  The swirling axis of the swirling airflow substantially coincides with the central axis Y11 passing through the center P11 of the suction space 135 in the cross section of the head portion 127. The swirling airflow in the region near the swirling axis swirls inside the suction space 135. The swirling airflow in a region away from the swivel axis (in other words, a portion close to the recessed surface of the suction dent (135)) exits from the suction port 122 and passes near the cleaning surface 120, and passes through the suction port. Return from 122 to the suction space 135.

  Also in the second embodiment, the cross-sectional shape of the suction space 135 is substantially the same regardless of the position in the left-right direction. That is, the area in the cross section of the suction space 135 is substantially constant regardless of the position in the left-right direction. In other words, the overall shape of the suction space 135 has a columnar shape close to a cylinder.

  The suction port 122 faces the cleaning surface 120 and has a rectangular shape that is long in the left-right direction when viewed from below, as shown in FIG. That is, the suction port 122 has a rectangular shape that is long in the left-right direction, similar to the projected shape of the suction space 135.

  The suction space 135 communicates with the outside of the head portion 127 through the missing portion 139 at the end portion 135b in the left-right direction. The defect | deletion part 139 is comprised so that airflow may flow in along the left-right direction from the outside. As shown by the broken line Y16 in FIG. 10, the swirling airflow swirling in the circumferential direction is directed from the both sides in the left-right direction toward the central ventilation portion 129 by the inflowing airflow.

  As shown in FIG. 13, the suction space 135 is ventilated through a ventilation port 143 that exists on the rear side of an imaginary line segment Y <b> 12 that passes through the turning axis (center axis Y <b> 11) and is orthogonal to the cleaning surface 120. It communicates with the space 137.

  Thereby, the air sucked from the suction port 122 advances toward the ventilation port 143 in a predetermined path. Here, the predetermined trajectory is a trajectory along the inner surface of the suction recess 135 having a shorter distance from the suction port 122 to the ventilation port 143.

  As shown in FIG. 17, the ventilation opening 143 is formed so as to straddle the virtual line Y14 extending in the front-rear direction passing through the center P11 of the suction space 135 and parallel to the cleaning surface 120 in the cross section. ing. As shown in FIG. 17, the ventilation port 143 has a vertical center P12 below the imaginary line segment Y14 (on the cleaning surface side) as shown in FIG.

  The ventilation space 137 extends in a direction intersecting the suction space 135 as shown in FIGS. 13 and 14. In the second embodiment, the intersecting direction is a direction orthogonal to the central axis Y11 of the suction space 135 in plan view, that is, the front-rear direction, as shown in FIG. The direction in which the ventilation space 137 extends from the suction space 135 is backward. Moreover, Y13 shown in FIG. 14 is the central axis of the ventilation space.

  The ventilation space 137 passes through the central axis Y13 of the ventilation space 137 and is perpendicular to the cleaning surface 120 (in the state shown in FIGS. 13 and 17, also referred to as “vertical longitudinal section of the ventilation space 137”). As shown in FIG. 17, it has an upstream region 137a extending from the suction space 135 along a virtual line segment Y15 connecting the center P12 of the ventilation port 143 in the vertical direction and the center P13 of the suction port 122 in the front-rear direction. As shown in FIG. 13, the ventilation space 137 has a region extending in a direction parallel to the cleaning surface 120 following the upstream region 137 a in the vertical longitudinal section.

  In other words, the ventilation space 137 extends along a virtual line segment Y15 connecting the center P13 of the suction port 122 and the center P12 of the ventilation port 143 in the vertical longitudinal section as shown in FIG. 137a), and then curved so as to be parallel to the cleaning surface 120 as shown in FIG. 13 (this region is the midstream region 137b), and then extends parallel to the cleaning surface 120 (this region is Downstream region 137c).

  As shown in FIG. 13, in the upstream region 137 a and the midstream region 137 b, the distance in the vertical direction (interval between the upper and lower walls) increases as the distance from the suction space 135 increases. In the downstream region 137c, the vertical distance (the distance between the upper and lower walls) is constant. In the middle flow region 137b and the downstream region 137c, the lower end (lower wall) of the ventilation space 137 extends in a direction parallel to the cleaning surface 120.

  When viewed from the front side, the ventilation opening 143 of the suction space 135 has a flat shape that is long in the left-right direction and short in the up-down direction, as shown in FIG. Although the upstream port 145 of the ventilation space 137 is not visible in FIG. 15, like the ventilation port 143, it has a flat shape that is long in the left-right direction and short in the vertical direction.

  In the cross section orthogonal to the vertical direction (corresponding to FIG. 14), the ventilation space 137 becomes smaller in the upstream area 137 a and the middle flow area 137 b as the distance in the left-right direction (the distance between the left and right walls) increases rearward from the suction space 135. It has become. In the downstream region 137c, the distance in the left-right direction (the distance between the left and right walls) is constant. In addition, in the downstream part of the ventilation space 137, the cross-sectional shape orthogonal to the central axis Y13 is circular.

(1-2) Configuration The suction port body 105 is configured to have the above-described suction path 126 inside. That is, the suction port body 105 may have any structure as long as the suction passage 126 can be formed, and the shape and the like are not particularly limited.

  The suction head 121 is configured to have the suction space 135 and the ventilation space 137 described above. That is, the suction head 121 may have a structure that can form the suction space 135 and the ventilation space 137, and the shape and the like are not particularly limited.

  The suction head 121 includes a head portion 127 and a ventilation portion 129. The head portion 127 is formed on a facing (lower) surface 151 a facing the cleaning surface 120 and extends in a direction parallel to the cleaning surface 120 (in the left-right direction), and the suction port 122 extends along the suction port 122. It has a suction dent (135) recessed from the suction opening 122, and a ventilation port 143 facing the suction dent (135). The ventilation portion 129 is connected to the head portion 127 in a state of communicating with the suction recess (135) through the ventilation port 143.

  The space formed by the suction recess (135) is the suction space 135, and hereinafter, the suction recess is also referred to as “135”. The ventilation portion 129 has a cylindrical shape, and the internal space is the ventilation space 137.

  In the cross section perpendicular to the central axis Y11 in the head portion 127 (see FIG. 13), the inner surface 127a that forms the suction recess 135 is a circular shape or a similar circular shape that is in contact with the cleaning surface 120, or a partial circle shape that lacks a part thereof. It has a circular shape. The “part” referred to here is closer to the cleaning surface 120 than the suction port 122 that exists between the circular or similar center P11 and the cleaning surface 120.

In the cross section (vertical vertical cross section) perpendicular to the central axis Y11 in the portion connected to the suction recess 135, the ventilation portion 129 has a longitudinal center P13 of the suction port 122 and the vertical direction of the ventilation port 143 as shown in FIG. And a cylindrical portion extending from the vent hole 143 along a virtual line segment Y15 connecting the center P12. An internal region of the tube portion is an upstream region 137a of the ventilation space 137.
As described above, the suction head 121 according to the second embodiment has the base portion 131 in addition to the head portion 127 and the ventilation portion 129, and each portion will be described below.

  The head portion 127 includes a lower head 151 and an upper head 153 as shown in FIGS. 10 to 13. Here, the upper head 153 is placed on the lower head 151.

  As shown in FIGS. 10, 11, and 13, the upper head 153 is configured by a semi-cylindrical body having a lower end opened. As shown in FIG. 13, the upper head 153 has a cross-sectional shape in which an oval shape elongated in the vertical direction is cut near the lower ends of the pair of linear portions. That is, the cross-sectional shape of the upper head 153 has an inverted “U” shape.

  As shown in FIGS. 10, 11, 13, and 14, the half cylinder constituting the upper head 153 has a half cylinder shape with a constant outer diameter and inner diameter. In other words, the half cylinder 152 has the same thickness regardless of the left-right direction. The lower end of the upper head 153 is attached to the lower head 151.

  10 to 13, the lower head 151 includes a front lower head 155 attached to the front lower end of the upper head 153 and a rear lower head 157 attached to the rear lower end of the upper head 153.

  As shown in FIG. 17, the front lower head 155 has a fitting groove 159 into which the front portion of the lower end portion of the upper head 153 is inserted. As shown in FIG. 17, the rear lower head 157 has a fitting groove 161 into which the rear portion of the lower end portion of the upper head 153 is inserted.

Here, the front lower head 155 and the rear lower head 157 are made of, for example, a rubber material. Thereby, even if the front part of the head part 127 collides with a wall or the like during cleaning, or the rear part of the head part 127 collides with furniture or the like, damage to the upper head 153 can be suppressed.
That is, the front lower head 155 has the function of the front guard 44 of the first embodiment, and the rear lower head 157 has the function of the rear guard 46 of the first embodiment.

  Further, the front lower head 155 and the rear lower head 157 are made of a rubber material, and the fitting means in which the lower end portion of the upper head 153 is fitted in the fitting groove 159 or the fitting groove 161 is used as the mounting means. Air leakage from between the front lower head 155 and the upper head 153 and between the rear lower head 157 and the upper head 153 can be suppressed.

  Since the size of the fitting grooves 159 and 161 is made smaller than the lower end portion of the upper head 153, the fitting grooves 159 and 161 press the lower end portion of the upper head 153 in the groove. It is possible to prevent air from leaking from the mounting portion with the head 151.

  The upper surface 155a on the rear side of the front lower head 155 with respect to the fitting groove 159 has an arc that moves upward from the cleaning surface 120 as it moves away from the suction port 122 in the front cross section as shown in FIG. It has a shape. That is, the surface in contact with the suction space 135 of the front lower head 155 constitutes a part of a missing circle shape or a notch circle shape that is a recessed shape of the suction recess 135 of the head portion 127.

  The upper surface 157a on the front side of the fitting groove 161 in the rear lower head 157 has an arc that moves upward from the cleaning surface 120 as it moves rearward from the suction port 122 as shown in FIG. The shape is close to the shape. That is, the surface in contact with the suction space 135 of the rear lower head 157 constitutes a part of a missing circle shape or a notch circle shape that is a recessed shape of the suction recess 135 of the head portion 127.

  The rear lower head 157 has a plate shape in a plan view, and a rear side portion from the fitting groove 161 is a mounting region for mounting the base portion 131 as shown in FIG. The base portion 131 can be mounted by, for example, screwing using a screw or joining using an adhesive.

  The front lower head 155 and the rear lower head 157 are provided with two pairs of left and right wheels 163. This wheel 163 is for moving the suction inlet 105 smoothly. The wheel 163 may be provided either in a state where a part thereof enters the lower head 151 or in a state where the wheel 163 does not enter the lower head 151 at all.

  The ventilation part 129 is comprised by the cylinder as shown in FIGS. 13-15. As shown in FIG. 14, the ventilation portion 129 is connected to the head portion 127 in a state where the central axis Y13 is orthogonal to the central axis Y11 of the suction space 135 in the upper head 153 in plan view. That is, when the state in which the ventilation portion 129 is connected to the head portion 127 is viewed in a plan view, a “T” shape is obtained.

  As shown in FIGS. 14 and 15, the upstream port 145 of the ventilation portion 129 has a flat shape that is thin in the upward direction and wide in the left-right direction, as shown in FIGS. 14 and 15. The downstream port 165 of the ventilation portion 129 has a circular shape in the cross section. That is, the ventilation portion 129 has a shape that gradually changes from a flat and thin cylindrical shape having a small thickness to a cylindrical shape close to a cylinder as it moves from the upstream side to the downstream side.

  The central axis Y13 of the ventilation portion 129 extends linearly in the front-rear direction in plan view (see FIG. 14), and extends obliquely upward and rearward from the upstream end in side view (when viewed from the left-right direction). Then, it extends in a direction parallel to the cleaning surface 120 (see FIG. 13).

  As shown in FIG. 10, the ventilation portion 129 has an outer flange 167 extending in the radial direction over the entire circumference of the intermediate portion. The lower end portion of the outer casing 167 is attached to the base portion 131 as shown in FIG. Note that the downstream side of the outer casing 167 in the ventilation portion 129 is a connecting portion 169 connected to the joint 123.

  As shown in FIGS. 10 and 13, the base portion 131 has a plate shape. A rear lower head 157 is fixed to the front portion 171 of the base portion 131, and an outer collar 167 of the ventilation portion 129 is fixed to the central portion 172. This prevents the head part 127 and the ventilation part 129 from coming off.

In addition, the head part 127 and the ventilation part 129 may be fixed by another means, and a base part may become unnecessary by using another means.
As shown in FIG. 13, the base portion 131 has a recess 173 in the central portion for allowing a joint 123 to be described later to rotate with respect to the ventilation portion 129. A rear end portion of the base portion 131 is provided with a pair of left and right wheels 175 for smoothly moving the suction port body 105.

(2) Joint and Joint Body The joint 123 is connected to the ventilation portion 129 of the suction head 121 and the joint body so that the joint body 125 can be rotated clockwise and counterclockwise with respect to the suction head 121 and can be raised and lowered. 125 is connected.

  Hereinafter, the description will be made mainly with reference to FIG. The joint 123 includes a main body portion 177, a fixing portion 179, and a cover portion 181. The main body portion 177 includes an external fitting cylinder portion 183 that is externally fitted to the connecting portion 169 of the ventilation portion 129, and a bearing portion 185 that receives the shaft portion 191 (191a, 191b) of the joint body 125 from the cleaning surface 120 side. The joint body 125 includes a joint body portion 187 and a joint cover portion 189.

  The external fitting cylinder portion 183 and the connecting portion 169 have grooves 183a and 169a formed in the circumferential direction at positions corresponding to each other. A through-hole 183b is formed in the groove 183a of the outer fitting cylinder portion 183 at intervals in the circumferential direction. The bearing portion 185 has a recessed receiving portion 193 at the upper end portion of a pair of receiving plates 195 erected at intervals in the left-right direction.

  The fixing portion 179 uses a so-called C-ring, and has a convex portion 179a at a position corresponding to the through hole 183b of the outer fitting cylindrical portion 183 on the inner peripheral surface. In a state where the connecting portion 169 is inserted into the outer fitting cylinder portion 183, the fixing portion 179 is fitted into the groove 183a of the outer fitting cylinder portion 183. The tip of the convex portion 179 a of the fixing portion 179 engages with the groove 169 a of the connecting portion 169 beyond the through hole 183 b of the main body portion 177. As a result, the main body 177 of the joint 123 is rotatably mounted without being removed from the ventilation portion 129.

  The cover portion 181 has a semi-cylindrical shape, and is attached to the main body portion 177 so as to cover them from above in a state where the shaft portion 191 of the joint body 125 is fitted in the recessed receiving portion 193 of the bearing portion 185. . As a result, the joint body 125 is attached to the main body 177 so that it can be raised and lowered without coming off.

3. Usage State The airflow in the suction port body 105 during the operation of the vacuum cleaner 1 described above will be described.
First, when the electric blower of the vacuum cleaner main body 3 is driven, the suction port body 105 sucks ambient air through the suction port 122. At this time, since the ventilation space 137 exists behind the suction space 135, the ventilation space 137 is sucked into the ventilation portion 129 from the suction port 122 via the rear side of the suction port 122.

  Upon suction, the lower surface of the lower head 151 (here, the front lower head 155 and the rear lower head 157) is sucked so that the suction port 122 is closest to the cleaning surface 120 in a cross section orthogonal to the left-right direction. The front and back of the mouth 122 are inclined. Thereby, the flow velocity of air entering the suction port 122 can be increased, and as a result, the suction force of dust and the like can be improved.

  Hereinafter, the suction space 135 in the suction head 121 will be described by being divided into a central portion 135a and an end portion 135b in the left-right direction. Here, the central portion 135a is a portion facing the vent hole 143 in the suction space 135. The end portion 135b is a portion located outside the central portion 135a in the left-right direction in the suction space 135.

(1) Central portion At the central portion 135a, air and dust existing between the lower surface 151a of the head portion 127 and the cleaning surface 120, and air and dust around the head portion 127 enter the suction space 135 from the suction port 122. Sucked.

  In the central portion 135a, the ventilation port 143 is present near the central portion 122a in the left-right direction of the suction port 122, so that most of the dust and the like sucked into the suction space 135 is directly sucked into the ventilation space 137.

(2) End portion The inner surface of the suction dent 135 has a circular shape in a cross section. For this reason, the air or the like sucked into the suction space 135 from the end portion 122 b of the suction port 122 turns to the ventilation port 143 in the center while turning along the inner surface of the suction recess 135.

That is, since the end portion 122 b in the left-right direction of the suction port 122 is far from the ventilation port 143, the air sucked from the end portion 122 b is difficult to be directly (linearly) sucked into the ventilation port 143, so The air is sucked into the air vent 143 while turning along.
As a result, a swirling airflow (such as dust) toward the central ventilation portion 129 is generated at the left and right end portions 135b of the suction space 135, as indicated by a broken line Y16 in FIG.

  Accordingly, in the end portion 135b, air, dust, and the like existing between the lower surface of the head portion 127 and the cleaning surface 120 and air and dust around the end of the head portion 127 are sucked into the suction space 135 from the suction port 122. Then, the air is sucked into the ventilation space 137 along the swirling airflow in the suction space 135.

  On the other hand, the cross-sectional shape of the suction space 135 inside the head portion 127 (see FIG. 13 and FIG. 17) has a circular shape as a whole, including the portion below the suction port 122. The swirling airflow Y16 swirls along the trajectory along. Therefore, below the head portion 127, the swirling airflow Y16 protrudes from the suction port 122, passes through the vicinity of the cleaning surface 120, and returns to the suction port 122 again. The airflow outside the head portion 127 is referred to as an out-of-space airflow.

Therefore, when cleaning a carpet or the like, an airflow outside the space enters between the raised hairs of the carpet. Thereby, the space | interval of raising is expanded and the dust etc. which existed between raising can be sucked in efficiently.
As described above, by using the airflow outside the space, the same effect as that of the conventional rotating brush can be obtained, and wear of the carpet or the like can be suppressed.

4). As shown in FIG. 15, the shape of the ventilation port 143 is a flat shape that is wide on the left and right when the ventilation port 143 is viewed from the front. When the length in the left-right direction of the ventilation port 143 is “L1” and the height in the vertical direction of the ventilation port 143 is “H”, the flatness ratio H / L1 of the ventilation port 143 is generated in the end portion 135b of the suction space 135. The swirling airflow is set to be sucked into the ventilation port 143.

That is, in FIG. 15, when the length L <b> 2 between the left and right ends of the suction space 135 and the end of the ventilation port 143 becomes smaller, the swirling airflow generated at the end portion 135 b becomes difficult to be sucked into the ventilation port 143.
Conversely, as the length L2 increases, the range in which the swirling airflow moves in the left-right direction decreases, and the effect as a substitute for the rotating brush decreases.

  From the above, the length L1 of the ventilation port 143 in the left-right direction is preferably in the range of 0.1 to 0.7 with respect to the overall length L of the suction space 135 in the left-right direction. The ratio of L1 / L is more preferably in the range of 0.15 to 0.65.

  Similarly, the flatness ratio H / L1 of the ventilation port 143 is influenced by the suction force of the cleaner body, but is preferably in the range of 0.05 to 0.4. Is more preferably in the range of 0.1 to 0.3.

<Third Embodiment>
A suction head 201 according to the third embodiment will be described with reference to FIG.
FIG. 18 is a longitudinal sectional view of the suction head.

  The suction head 201 has a suction space 203 and a ventilation space 205 inside. The suction space 203 and the ventilation space 205 are connected via a ventilation port 207. The suction head 201 includes an upper head 211 and a lower head 213. The suction space 203 and the ventilation space 205 are formed by combining the upper head 211 and the lower head 213.

  The upper head 211 has a recessed portion 215 that is recessed corresponding to the upper half of the suction space 203 and the ventilation space 205. The lower head 213 has a recessed portion 217 that is recessed corresponding to the lower half of the suction space 203 and the ventilation space 205.

  Here, the front part of the lower head 213 is a front guard part 219 corresponding to the front guard 44 of the first embodiment. The rear part of the lower head 213 is a rear guard part 221 corresponding to the rear guard 46 of the first embodiment.

  In the third embodiment, the lower head 213 has through holes 223 in both side walls in the left-right direction. Thereby, since air flows into the suction space 203 in the left-right direction from the through hole 223 (suction), the swirling airflow generated at the end portion in the left-right direction of the suction space 203 is smoothly ventilated at the center in the left-right direction. It can be directed to the mouth 207.

<Modification>
As mentioned above, although the vacuum cleaner and suction body which concern on embodiment were demonstrated, this invention is not restricted to said each embodiment, For example, the following modifications may be sufficient. Further, the embodiment may be a combination of the modified example and the modified examples.
In addition, examples that are not described in the embodiments and modifications, and design changes that do not depart from the gist are also included in the present invention.

1. Vacuum cleaner In the first and second embodiments, the vacuum cleaner 1 has been described with respect to the floor moving type, but other types may also be used. Other types include, for example, a cylindrical floor moving type, a broom type (stick type, portable type) and the like.
The vacuum cleaner referred to here is one using an electric blower, and may be a cable type connected to a commercial power supply via a cable, or may be a so-called charging type incorporating a charger (storage battery).

2. Suction Port Body (1) Structure The suction port body 40 of the first embodiment has a cylindrical body 42, a ventilation path 48, a joint 50, a first pipe 52 and a second pipe 54, and these internal spaces are It is a suction path through which dust and the like pass.

The suction port body 105 of the second embodiment has a suction head 121, a joint 123, and a joint body 125, and these internal spaces serve as suction passages 126 for passage of dust and the like.
However, the suction port body only needs to have a structure having at least a suction space inside, for example, a structure in which the tube (13) is connected to the ventilation port of the cylindrical body or the downstream port of the suction head. Good. In this case, the suction path of the suction port body is formed in the cylindrical body or the suction head. Conversely, when other members or the like are combined and dust or the like sucked from the suction port passes through the other members, the passages inside the other members are also included in the suction path.

(2) Whole suction space (2-1) In 1st and 2nd embodiment, it is set as the left-right direction parallel to a to-be-cleaned surface as an example of the direction where suction space extends. However, the direction in which the suction space extends may be another direction, for example, the front-rear direction or a direction that obliquely intersects the front-rear direction.

(2-2) Missing circle shape In the first embodiment, the missing circle shape of the suction space in the cross section perpendicular to the direction in which the suction space extends is cut off from the lower side of the circle shape that is a similar circle shape. It has a shape like this. In the second and third embodiments, the missing circular shape of the suction space in the cross section orthogonal to the direction in which the suction space extends is such that the lower side of the oval shape, which is a similar circular shape, is cut off. ing.

  However, the similar circular shape that forms the basis of the defective circular shape of the suction space in the cross section may be other than the circular shape or the oval shape. Other shapes include an elliptical shape, a polygonal shape with a hexagonal shape or more.

  That is, the cross-sectional shape of the suction space may be a shape that allows dust or the like sucked from the suction port to generate a swirling airflow along the inner peripheral surface of the cylindrical body or the inner peripheral surface of the head portion of the suction head. .

Therefore, the shape of the cylindrical body or the head portion is not particularly limited as long as it has the above-described suction space inside.
Although the suction space 135 has a columnar shape, as described above, the suction space only needs to have a shape that can generate a swirling airflow, and the overall shape of the suction space is limited to the columnar shape. It is not something. For example, the suction space may have a cylindrical shape whose cross-sectional shape is an oval shape or an oval shape.

(2-3) Defect portion The defect portion 139 of the second embodiment is configured by a notch that is recessed from the lower surface toward the central axis of the suction space. However, the function of the missing part is to allow an air flow in the left-right direction to flow into the suction space from the outside. In other words, the missing part can be said to be an inflow part. This inflow part is also comprised by the through-hole 223 of 3rd Embodiment. In addition, the shape of a defect | deletion part and a through-hole is not specifically limited.

(3) Ventilation space (3-1) Stretching direction The ventilation space is connected to the suction space in the cross section perpendicular to the direction in which the suction space extends in the portion connected to the suction space. It only has to exist. Therefore, the ventilation space may extend in a straight line over the entire length of the ventilation space, or the extending direction may change linearly or may change in a curve. Moreover, the extending | stretching direction of the ventilation space from the suction space in planar view is not specifically limited.

(3-2) Connection position The ventilation space is not particularly limited as long as it is connected to the suction space via the ventilation port.

For example, when the length of the suction space in the extending direction is short, the ventilation space may be connected to an end portion of the suction space in the extending direction.
Further, the ventilation space may be connected at a central portion in the extending direction of the suction space. In this case, the swirling airflow can be used on both sides of the suction region in the extending direction. Further, when connected at the central portion, the suction force can be made substantially equal on both sides of the suction space with respect to the ventilation space.

(3-3) Number In the first and second embodiments, for example, one ventilation path 48 and ventilation portion 129 are connected to one cylindrical body 42 and head portion 127 (that is, one ventilation space is 1). However, for example, a plurality of ventilation spaces may be connected to one suction space, or one ventilation space may be connected to a plurality of suction spaces. Also good.

3. Suction space The suction space is constituted by one member of the cylindrical body 42 in the first embodiment, and in the second embodiment, the upper head 153 and the lower head 151 (front lower head 155 and rear lower head 157) It was composed of members.

  The suction space only needs to extend in a predetermined direction and the cross-sectional shape thereof is an incomplete circle, and the number of parts, material, size, etc. of the members for constituting the suction space are not particularly limited. Absent.

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 105 Suction inlet 127 Head part 129 Ventilation part 135 Suction space 137 Ventilation space 143 Ventilation opening

Claims (5)

A head portion having a suction space inside and a suction port on the side facing the cleaning surface;
A ventilation path that is connected to the head portion and has a ventilation space that communicates with the suction space through a ventilation opening;
A suction port body of a vacuum cleaner having
The suction space extends in a direction parallel to the cleaning surface,
The suction port is located between the central axis of the suction space and the cleaning surface,
The suction space communicates with the outside of the head portion through the suction port, and in a circular shape or a similar circular shape in contact with the cleaning surface in a cross section orthogonal to the parallel direction, the circular shape or a similar circular shape. A missing circle shape or a missing circle shape lacking the cleaning surface side from the suction port present between the center of the shape and the cleaning surface,
The suction port body in which the area in the cross section of the suction space is constant along the parallel direction. The suction port body according to claim 2, wherein the ventilation path is connected to the head portion at a central portion in a direction in which the suction space extends. The suction port body according to claim 1, wherein the ventilation port has a flat shape that is long in the parallel direction. The suction according to any one of claims 1 to 3, wherein the suction space is formed in an end wall of the head portion in the parallel direction and communicates with the outside by a defect portion extending along the parallel direction. Mouth body. In a vacuum cleaner comprising a suction port and a vacuum cleaner body,
The vacuum inlet is the vacuum inlet according to any one of claims 1 to 4.

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