JP5297963B2 - Electric vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an increase in ventilation loss which is caused by the loss of kinetic energy in the neighborhood of an outlet of a flow-in port, since a check valve becomes a ventilation resistance when the check valve is not sufficiently opened in sucking air. <P>SOLUTION: The side portions 76 of three valve elements constituting the check valve 75 to close the flow-in port 30 are bent or curved toward the upstream side. Thus, the check valve 75 is largely opened by the wind pressure of the air sucked from the flow-in port 30, thereby reducing the ventilation loss in the flow-in port 30 or in the neighborhood of the outlet of the flow-in port 30. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vacuum cleaner having a dust container (a container-shaped member) in a dust collection case.

  A vacuum cleaner that reduces airflow loss in the dust collection case is described in, for example, Japanese Patent No. 3762360 (Patent Document 1). A vacuum cleaner disclosed in Patent Document 1 includes a dust separation unit that separates air and dust flowing through an air passage from a suction port of a cleaner body to an intake port of an electric blower, and the separation unit. And a dust storage part for storing the dust separated in (1). An introduction raised portion is formed at one end in the width direction of the dust reservoir provided on the lower side of the dust separator, and the dust separator is provided with an air passage formation body and a guide portion. It has a separation opening that communicates and a filter attached to the opening, and one end defines a separation air passage that communicates with the suction opening. The guide portion has an air blowing wall portion facing the other end opening of the separation air passage, and is provided obliquely across the introduction bulge portion and the other end opening, and communicates the air passage formation body and the dust storage portion. Yes.

  Moreover, the vacuum cleaner shown by patent document 2 is equipped with the dust collection container for accommodating dust in a dust collection case, and has a filter which isolate | separates air and dust in this dust collection container. In addition, the electric vacuum cleaner disclosed in Patent Document 2 includes a check valve at the inlet of the dust collecting case that prevents dust accumulated in the dust collecting container from flowing backward or spilling of the sucked dust from the dust collecting case. .

Japanese Patent No. 3762360 JP 2009-320 A

  In order to maintain a predetermined suction force for the electric blower, the ventilation loss in the dust collection case is reduced, and the dust collected in the dust collection container body is separated to a place that does not hinder the flow of air sucked into the electric blower There is a need. While the vacuum cleaner is in operation, light and fluffy fiber dust such as cotton dust tends to become a compressed mass due to the air flow passing through the dust collecting container. However, when dust accumulates, the air volume of the vacuum cleaner decreases due to clogging of the filter, and the compressive force on the dust due to the air flow decreases.

  In order to reduce the ventilation loss in the dust collection case, a configuration has been proposed in which dust and air flow separated into a dust reservoir provided on the lower side of the dust separator are introduced as in the invention described in Patent Document 1. However, since the airflow flowing from the suction port of the dust collecting case is bent, the kinetic energy loss of the wind becomes large, and it is difficult to improve the suction work rate.

  In the invention described in Patent Document 2, since the inflow port is formed in the horizontal direction and does not follow the lower wall surface of the dust collection container, kinetic energy is lost in the vicinity of the exit of the inflow port in the dust collection container, Ventilation loss occurs. Further, in the invention described in Patent Document 2, if the check valve is not sufficiently opened when air is sucked, the check valve becomes a ventilation resistance, and kinetic energy is lost in the vicinity of the outlet of the inlet. , Increase ventilation loss.

  An object of the present invention is to provide a vacuum cleaner having a small airflow loss near an inlet or an outlet of the inlet.

  In order to solve the above-mentioned object, the present invention is characterized in that side portions of a plurality of valve bodies constituting a valve (for example, a check valve) for closing an inflow port are bent or curved upstream. .

  Alternatively, according to the present invention, a valve body arranged on the upper side among a plurality of valve bodies constituting a valve (for example, a check valve) that closes the inflow port is supported by the inflow port below the center of the valve body. It is characterized by being.

Alternatively, according to the present invention, the support portions of the plurality of valve bodies constituting a valve (for example, a check valve) for closing the inflow port have one end connected to the plane portion of the valve body and the other end connected to the inflow port. And has a curved shape that swells downstream from the plane portion and is curved .

  According to the present invention, since the side portion of the valve body is bent or curved upstream, the valve body can be largely opened by the wind pressure of the air sucked from the inflow port. Ventilation loss in the vicinity of the outlet can be reduced.

  According to the present invention, the valve element disposed on the upper side is supported by the inlet on the lower side of the center of the valve element, so that the upper opening area is increased in the vicinity of the outlet of the inlet, Ventilation loss in the vicinity of the outlet of the inflow port can be reduced.

  According to the present invention, since the support portion of the valve body has a curved shape that swells and curves downstream from the valve body, the valve body can be greatly opened by the wind pressure of the air sucked from the inflow port. Or the ventilation loss in the vicinity of the exit of the inflow port can be reduced. Further, according to the present invention, since the support portion of the valve body has a curved shape that swells and curves downstream from the valve body, it is possible to suppress the occurrence of cracks in the support portion of the valve body, and the durability of the valve Can be improved.

It is an external appearance perspective view of the vacuum cleaner of Example 1 of this invention. It is a perspective view which shows the state which opened the upper cover of the cleaner body of Example 1 of this invention. It is a perspective view which shows the state which opened the cleaner lid of Example 1 of this invention, and removed the dust collection case. It is an external appearance perspective view of the dust collection case of Example 1 of this invention. It is a side view of the dust collection case of Example 1 of this invention. It is sectional drawing including the center of the inflow part of a dust collection case seen in the arrow 70 direction of FIG. It is sectional drawing of the center part of the inflow port 30 of the dust collection case 5 of Example 1 of this invention. It is the front view which showed the place which opened the front cover of the dust collection case of Example 1 of this invention. It is AA sectional drawing shown in FIG. It is the P section enlarged view shown to Fig.9 (a). It is the P section enlarged view shown to Fig.9 (a). It is the front view which showed the place which opened the front cover and 2nd filter of the dust collection case of Example 1 of this invention. It is BB sectional drawing shown in FIG. It is a perspective view which shows the place where the dust collecting container of Example 1 of this invention was hold | maintained by the clamp member (locking means). It is the external appearance perspective view which showed the dust collection container taken out from the dust collection case of Example 1 of this invention. It is the external appearance perspective view which showed the dust collection case of Example 1 of this invention from the back. It is the perspective view which showed the place which open | released the filter part from the dust collection case of Example 1 of this invention. It is a perspective view of a dust collection case in the state where a front cover was closed to a dust collection case of Example 2 of the present invention. It is a sectional side view of a dust collection case in the state where the front cover was closed to the dust collection case of Example 2 of the present invention. It is a front view of a dust collection case in the state where the front cover was closed to the dust collection case of Example 2 of the present invention. It is a figure which shows the rear part of the inflow port formed integrally of Example 2 of this invention, and a non-return valve. It is a perspective view from the back part of the inflow mouth formed in Example 2 of the present invention in one and the back of a check valve. It is a figure which shows one valve body of the lower side of Example 2 of this invention.

  Examples 1 and 2 of the present invention will be described below.

  Embodiments of the present invention will be described with reference to the drawings. First, the outline of the electric vacuum cleaner will be described with reference to FIGS. 1 to 4. FIG. 1 is an external perspective view of a vacuum cleaner showing an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the upper cover of the cleaner body is opened. FIG. 3 is a perspective view showing a state where the upper cover of the cleaner body is opened and the dust collecting case is removed. FIG. 4 is an external perspective view of a dust collection case showing an embodiment of the present invention.

  As shown in FIGS. 1 and 2, the electric vacuum cleaner 1 according to the present embodiment includes a vacuum cleaner body 2, a hose 12, a hand operating pipe 13, an expansion joint pipe 14, and a suction mouth 15. The operation tube 13 is connected by a hose 12, and a suction port 15 is connected to the local operation tube 13 via an expansion joint tube 14. In addition, the hose 12 has the connection part 12a attached to the hose connection port part 10 of the cleaner body 2.

The cleaner body 2 includes an electric blower (not shown) and a cord reel (not shown).
Dust-containing air is sucked from the suction port 15 by the intake air flow when the electric blower is driven, and the sucked dust-containing air is sucked into the cleaner body 2 through the expansion joint pipe 14, the hand operation pipe 13 and the hose 12, After dust is collected (collected) by the dust case 5, the air is exhausted outside the apparatus. The operation mode of the vacuum cleaner 1 can be switched by a switch 16 provided on the hand operation tube 13.

  As shown in FIGS. 2 to 3, the vacuum cleaner body 2 has a dust collection case 5 in a dust collection case storage portion 9 formed in a recess of the upper body case 4 disposed between the lower body case 3 and the upper lid 8. It is detachably attached. The upper lid 8 is attached to the upper rear portion of the upper body case 4 so as to be able to turn. The dust collection case 5 is taken in and out as shown in FIG. 2 with the upper lid 8 opened, and the upper lid 8 is closed during operation of the vacuum cleaner 1.

  In addition, a filter case 17 is provided between the lower main body case 3 and the upper main body case 4, and a protective filter 18 and a filter cover 19 for suppressing the protective filter 18 are disposed in the filter case 17. Further, a dust removal unit 7 is disposed above the filter case 17. The dust removal rotating body 24 provided in the dust removal unit 7 rotates and repels a second filter 21 formed in a pleat shape, which will be described later, to remove dust collected by the second filter 21.

  The lower body case 3 includes a traveling wheel 11 and a guide wheel (not shown) for causing the cleaner body 2 to travel on the floor surface. Furthermore, a handle 6 is attached to the upper part of the upper body case 4 so as to be able to rotate, and the cleaner body 2 can be carried.

  An inflow port 30 (inflow pipe) provided in the dust collecting case 5 and a connection portion 12a of the hose 12 inserted into the hose connection port portion 10 are in contact with each other in an airtight state through the elastic seal member 10a. The inflow port 30 is formed of a tubular member in which an air flow path is formed. The inflow port 30 may be made of a hard material such as resin similar to the dust collection case 5, or may be made of an elastic material such as rubber different from the dust collection case 5. Here, when the dust collection case 5 is attached to the cleaner body 2, the dust collection case 5 and the filter case 17 can be hermetically sealed by an elastic seal member 62 provided on the frame of the second filter 21 described later. I have to. Further, the filter case 17 and an electric blower (not shown) are in contact with each other in an airtight state via an elastic vibration-proof rubber (not shown).

  Next, the arrangement inside the cleaner body 2 will be described. The hose connection port 10 is located at the center in the width direction of the cleaner body 2 as viewed from above, and is disposed on the front surface of the cleaner body 2. Similarly, the inlet 30 of the dust collection case 5 is located at the center in the width direction of the dust collection case 5 and is disposed in front of the dust collection case 5. In a state where the dust collection case 5 is attached to the dust collection case housing portion 9, the hose connection port portion 10 and the inflow port 30 come close to or come into contact with each other. By arranging in this way, there is no need to provide a curved flow path or the like at the inlet portion of the dust collecting case 5, so that an effect of reducing ventilation loss can be obtained.

  Moreover, since the inlet 30 which is an air intake is provided in the dust collecting case 5 below the center of the height direction of the dust collecting case 5, the hose connection port 10 communicating with the inlet 30 is also provided. The vacuum cleaner body 2 can be disposed below the center in the height direction. For this reason, since the hose connection port part 10 can be arrange | positioned at the lower part of the cleaner body 2, when a user pulls around the cleaner body 2 via the hose 12 with the hand operation tube 13, the cleaner The main body 2 is difficult to fall down and can be stably routed.

  Next, the dust collection case 5 will be described with reference to FIGS. FIG. 4 is an external perspective view of the dust collecting case 5 showing an embodiment of the present invention. FIG. 5 is a side view of the dust collecting case 5 showing an embodiment of the present invention. 6 is a cross-sectional view including the center of the inlet 30 of the dust collecting case 5 as viewed in the direction of the arrow 70 in FIG. FIG. 7 is a cross-sectional view of the central portion of the inlet 30 of the dust collection case 5 showing an embodiment of the present invention. FIG. 8 is a front view showing a state where the front lid 26 (closing member) of the dust collecting case 5 showing an embodiment of the present invention is opened. Fig.9 (a) is AA sectional drawing shown in FIG. FIGS. 9B and 9C are enlarged views of the portion P shown in FIG. 9A. FIG. 10 is a front view showing a state where the front lid 26 and the second filter 21 of the dust collection case 5 showing an embodiment of the present invention are opened. 11 is a cross-sectional view taken along line BB shown in FIG. FIG. 12 is a perspective view showing a dust collection container 20 according to an embodiment of the present invention held by a clamp member 29 (locking means). FIG. 13 is an external perspective view showing the dust collection container 20 removed from the dust collection case 5 showing an embodiment of the present invention. FIG. 14 is a perspective view showing the dust collecting case 5 showing an embodiment of the present invention from the back side. FIG. 15 is a perspective view showing a state in which the second filter 21 is opened from the dust collecting case 5 showing an embodiment of the present invention.

  As shown in FIGS. 6 to 12, the dust collection case 5 includes a dust collection container 20 for collecting dust and containing the dust, and the dust collection container 20 is an opening of the dust collection case 5. 25 so that it can protrude from 25. The dust collecting container 20 is located in the dust collecting case 5 in a state where a part of the dust collecting container 20 protrudes from the opening 25 of the dust collecting case 5. Further, the dust collecting container 20 includes a first filter 64 that separates air and dust. The dust collecting container 20 collects large coarse dust by the first filter 64 by filtration. However, the dust container 20 is not an essential configuration.

  The dust collection case 5 has an opening 25 in which the dust collection container 20 appears and disappears on the front side. A rotating shaft 27 is provided at the lower portion of the front lid 26 as an opening / closing lid for opening and closing the opening 25, and the front lid 26 is rotatably supported by the rotating shaft 27 at the lower front side on the outer peripheral side of the dust collecting case 5. The The front lid 26 has an inlet 30 through which dust-containing air containing dust flows, and the dust-containing air that has passed through the inlet 30 flows into the dust collecting container 20. The dust collecting container 20 is formed in a container shape having an inlet 30 side (front side) opened, a first filter 64 provided on the back side (bottom side) and the top, bottom, left and right sides opposite to the opening. As viewed, the upstream side is open, and the first filter 64 is disposed on the downstream side. The shape of the dust collecting container 20 may be a cage shape, a box shape or a container shape with one surface opened, or a dustpan shape. The back side (bottom side) opposite to the opening may be formed with a curved surface. That is, the dust collection container 20 has a shape recessed on the opposite side to the opening. The cross-sectional shape of the dust collection container 20 may be a substantially square shape, a substantially circular shape, or a substantially triangular shape. The opening of the dust collecting container 20 is disposed so as to face the inflow port 30, and the dust flowing in from the inflow port 30 is received by the dust collecting container 20. When the front lid 26 is opened, the dust container 20 protrudes (jumps out) toward the inlet 30 into which dust flows. That is, the dust collection container 20 provided with the first filter 64 is provided so as to be able to protrude from the opening 25 of the dust collection case 5, and dust collected on the upstream side of the first filter 64 is moved in the direction of air flow (dust dust). In the opposite direction to the direction in which the air is sucked, the air is discharged so as to be pushed toward the upstream side in the air flow direction. For this reason, the dust collection container 20 can be easily discarded without impeding the operation when the dust collection container 20 protrudes from the opening 25 of the dust collection case 5. A check valve 31 (blocking member) is provided on the inner surface of the outlet end of the inflow port 30 to prevent dust accumulated in the dust collecting container 20 from flowing back or spilling of the sucked dust from the dust collecting case 5. When the inlet 30 is made of an elastic material separate from the dust collecting case 5, the check valve 31 is made of an elastic material such as rubber similar to the inlet 30, and is integrated with the inlet 30. Preferably, it is molded (for example, injection molding). By forming the check valve 31 and the inflow port 30 integrally, manufacturing is facilitated and productivity is improved.

  As shown in FIG. 8, the check valve 31 has a shape corresponding to the inner surface of the circular inflow port 30 and closes the inner surface of the circular inflow port 30. And the non-return valve 31 consists of three fan-shaped valve bodies. In a state where the front lid 26 is closed to the dust collecting case 5, one valve body is formed at the lower center of the inner surface of the circular inflow port 30, and two valve bodies are formed on the upper left and right. The three valve bodies have the same shape, and the fan-shaped angle of each valve body is 120 degrees. Each valve body has a planar shape. The arc portion of each valve element faces (preferably abuts) the inner surface of the inlet 30, and the side part of each valve element opposes (preferably abuts) the side part of the other valve element. The central part (60 degree part) of the arc part of each valve body is supported by the inflow port 30 so that rotation or rocking | fluctuation is possible. The support portion for the inflow port 30 also has a planar shape. The cross section (flow channel cross section) inside the inflow port 30 may be circular, elliptical, or polygonal (for example, rectangular or hexagonal).

  A handle 28 extending in the front-rear direction is provided on the upper portion of the dust collecting case 5. A clamp member 29 (locking means) is provided as front lid restraining means for restraining the front lid 26 closed on the distal end side of the handle 28 in a closed state. In addition, a locking groove 40 is provided in the upper portion of the front lid 26 and is engaged with the flange 36 of the clamp member 29 to restrain the front lid 26. By this front lid restraining means, the front lid 26 is restrained in a closed state. When the clamp member 29 is pushed and the collar 36 moves upward from the locking groove 40 to release the locking, the front lid 26 is It is opened so that it may fall forward.

  If the front lid 26 is closed, the front lid 26 pushes the dust collection container 20 to store the dust collection container 20 in a predetermined position in the dust collection case 5, and the flange 36 of the clamp member 29 is located above the front lid 26. The front lid 26 is restrained by engaging with a locking groove 40 provided on the dust collecting container 20, and the dust collecting container 20 is also locked by the front lid 26. That is, one operation of opening the clamp member 29 can open both the front lid 26 and the dust collecting container 20, and one operation of closing the front lid 26 brings the front lid 26 and the dust collecting container 20 into a predetermined position. Features that can be locked. When the front lid 26 is closed and the dust collecting container 20 is pushed into the dust collecting case 5 by the user, the collar portion 42 of the dust collecting case 5 shown in FIG. Since the support 63 of the dust container 20A that is the dust container 20 is pushed, the opened dust container 20 receives a force in the closing direction. That is, the front lid 26 pushes the dust collection container 20 to return the dust collection container 20 into the dust collection case 5, and the opened dust collection container 20 is returned to a predetermined position while being closed. Therefore, the operation of accommodating the dust collection container 20 in the dust collection case 5 can be easily performed.

  Here, a locking groove 37 is provided above the dust collecting container 20 on the clamp member 29 side. Therefore, when the dust collecting container 20 protruding from the opening 25 of the dust collecting case 5 is pushed to the dust collecting case 5 side, the flange 36 of the clamp member 29 engages with the locking groove 37 as shown in FIG. Thus, the dust collecting container 20 can be held. This state is a position between the state where the dust collection container 20 protrudes from the opening 25 of the dust collection case 5 and the case where the dust collection case 20 is locked at a predetermined position in the dust collection case 5 when sucking the dust. In this state, the dust container 20 is held. In this state, it is easy to clean the inside of the dust collecting container 20, and when using a disposable dust collecting filter paper such as dust paper described later, it is easy to place a disposable dust collecting filter paper such as dust paper. Even in this case, both the front lid 26 and the dust collecting container 20 can be opened by one operation of opening the clamp member 29. Further, when the front lid 26 is closed from this state, the dust collection container 20 can be stored in a predetermined position in the dust collection case 5 by being pushed by the front lid 26.

  The dust collecting container 20 has at least two dust accommodating part pieces 20A and 20B divided into upper and lower parts. Although the dust collecting container 20 can be divided into left and right parts, here, description will be given along two dust containing part pieces 20A and 20B divided into upper and lower parts.

  As shown in FIGS. 6 to 13, the upper dust container piece 20 </ b> A and the lower dust container piece 20 </ b> B are vertically joined to form a dust collecting container 20, and the dust disposal port 65 is a front side of the dust collecting container 20. Is provided. A rotary shaft 66 is provided on the back side / rear side of the dust collecting container 20, and the two dust accommodating portion pieces 20 </ b> A and 20 </ b> B are connected and supported rotatably by the rotary shaft 66. The two dust container pieces 20A and 20B that are rotatably connected and supported by the rotation shaft 66 can widen or narrow the dust disposal port 65. The rotating shaft 66 may be urged using a spring (not shown) in order to widen the dust disposal port 65. As this spring, a helical spring or a leaf spring is used. Further, the steel wire may be bent into a square shape and hooked on the dust container part 20A and the dust container part 20B constituting the dust collecting container 20 to be biased so as to be opened.

  Here, as shown in FIG. 6, the dust collecting container 20 is located from the dust disposal port 65 to the back side (from the upstream side to the downstream side in terms of air flow) in a state where the two dust container pieces 20A and 20B are combined. In a state where the two dust container pieces 20A and 20B are combined, the side shape of the dust collecting container 20 is substantially D-shaped. The dust collecting container 20 has a cross-sectional area with respect to the flow that is reduced downstream from the dust disposal port 65 disposed on the inlet 30 side, which is the upstream side. In other words, the dust container 20 extends toward the dust disposal port 65. Further, the flow path of the flow path 38 formed between the dust collection case 5 and the outside of the dust collection container 20 is expanded from the front lid 26 side on the upstream side to the second filter 21 side on the downstream side. It has a shape that goes on.

  The air flow that has flowed out of the dust collecting container 20 is upstream of the second filter 21 that is the most downstream side of the flow path 38, so that all of the air flow that flows into the dust collection case 5 flows. There is more air volume than. That is, since the air flow that has passed through the first filter 64 gradually gathers from the upstream side to the downstream side of the flow path 38, the air volume of the air flow that flows through the flow path 38 gradually increases from the upstream side to the downstream side. It has become. For this reason, since the flow path 38 becomes an enlarged flow path, a large increase in speed can be prevented in the flow path 38, and a ventilation loss can be reduced.

  Further, a dust collection container 20 is disposed on an extension of the inlet 30 which is a suction port of the dust collection case 5 communicating with the hose connection port 10, and this dust collection container 20 is formed in an arc shape to form two dust particles. In the state in which the housing pieces 20A and 20B are combined, as shown in FIG. 6, the cross section of the dust collecting container 20 is composed of an arc and a straight portion that is substantially in contact with the arc, and the side shape is substantially D-shaped. ing. In addition, the inlet 30 of the dust collection case 5 is formed in a cylindrical shape extending inward of the dust collection container 20. That is, the outlet end of the inflow port 30 is located so as to protrude inside the dust collecting container 20 from the opening of the dust collecting container 20. In order to prevent the air flow from being disturbed at the outlet end of the inlet 30, the outlet end of the inlet 30 is preferably close to or in contact with the inner wall surface of the dust collecting container 20. The central axis 100 of the inlet 30 of the dust collection case 5 is provided below the center of the dust collection case 5 in the height direction, that is, below the center of the dust collection container 20 in the height direction. It is formed along a substantially parallel part with the straight line part 200 constituting the dust container part 20B. As a result, the central axis 100 of the inlet 30 of the dust collecting case 5 is directed toward the side where the central axis (rotating shaft) of the electric blower exists when the dust collecting case 5 is stored in the dust collecting case storage unit 9. Inclined upwards. You may incline further upwards rather than substantially parallel. Further, the central axis 100 of the inlet 30 of the dust collection case 5 is in the vicinity of the outlet opening of the dust collection case 5 (near the outlet of the second filter 21), and the axial direction of the rotating shaft of the electric blower is the longitudinal direction of the cleaner body. The horizontal axis of the rotary electric blower or the center of the suction port of the horizontal electric blower may cross the straight line along the front-rear direction of the cleaner body. Here, crossing is only required to cross when the vacuum cleaner body is viewed from the side, that is, it only needs to cross in the front-rear direction and the vertical direction of the vacuum cleaner body, and in the width direction of the vacuum cleaner body. It may be shifted without. The central axis 100 of the inlet 30 of the dust collecting case 5 may be formed using a check valve 31 provided at the inlet 30.

  The cross-sectional shape of the flow path of the inflow port 30 may be a substantially circular shape, a substantially semicircular shape, a substantially elliptical shape, or a substantially rectangular shape. The central axis 100 of the inflow port 30 is a straight line or a curve connecting the centers of the flow path cross sections. The inflow port 30 may extend linearly, or may extend in a curved or bent manner. If the flow path cross-sectional shape of the inlet 30 is substantially the same in the axial direction, the flow path direction of the inner wall surface of the inlet 30 and the direction of the central axis 100 of the inlet 30 are substantially parallel. When the cross-sectional shape of the flow path of the inflow port 30 expands or contracts in the axial direction, the axial direction of the inner wall surface of the inflow port 30 and the direction of the central axis 100 of the inflow port 30 are not parallel and are expanded. Is the direction in which the flow path direction of the inner wall surface of the inlet 30 is wider than the direction of the central axis 100 of the inlet 30, and in the case of reduction, the flow path direction of the inner wall surface of the inlet 30 is the center of the inlet 30. The direction is narrower than the direction of the axis 100. The straight portion 200 is a straight portion when the upper, lower, left and right inner wall surfaces of the dust collection container 20 form a straight portion from the opening of the dust collection container 20 toward the back side wall surface. Alternatively, the straight portion 200 refers to the straight portion when the upper, lower, left, and right inner wall surfaces of the dust collecting container 20 form a straight portion from the position corresponding to the outlet end of the inflow port 30 toward the back wall surface. . Instead of forming the central axis 100 of the inflow port 30 of the dust collecting case 5 along the substantially straight line 200, the direction of the inner wall surface of the inflow port 30 of the dust collecting case 5 runs along the almost straight line 200. May be formed. In particular, when the inlet 30 of the dust collection case 5 is communicated to the lower side of the dust collection container 20, the flow path direction of the lower wall surface of the inlet 30 of the dust collection case 5 is set to the lower wall surface of the dust collection container 20. It is preferable to form it substantially parallel to the straight line part 200 of the above. When the inlet 30 of the dust collection case 5 is connected to the upper side of the dust collection container 20, the flow direction of the upper wall surface of the inlet 30 of the dust collection case 5 is set to the straight portion 200 of the upper wall surface of the dust collection container 20. It is preferable to form along substantially parallel. When the inlet 30 of the dust collection case 5 is communicated with either the left or right side of the dust collection container 20, the flow path direction of either the left or right wall surface of the inlet 30 of the dust collection case 5 is set to the dust collection container 20. It is preferable to form it along the straight part 200 of any one of the left and right wall surfaces. When the upper, lower, left and right inner wall surfaces of the dust collection container 20 do not form a straight portion from the opening of the dust collection container 20 toward the back side wall surface, the central axis 100 of the inlet 30 of the dust collection case 5 or the dust collection case 5 It is preferable to form the direction of the inner wall of the inlet 30 along the tangential direction of the wall surface of the dust collecting container 20 at a position corresponding to the outlet end of the inlet 30. When the inflow port 30 is curved or bent, it is preferable that the flow path direction of the central axis 100 near the outlet of the inflow port 30 or the wall surface near the outlet of the inflow port 30 is used as a reference. When the inlet 30 is also curved or bent at the outlet end, the tangential direction of the central axis 100 of the outlet end of the inlet 30 and the tangential direction of the wall surface of the outlet end of the inlet 30 are preferably used as a reference.

  The dust-containing air that flows into the dust collecting container 20 from the inlet 30 of the dust collecting case 5 and is collected and accommodated in the dust collecting container 20 is easily flowed directly by the inertia due to the weight of the dust. The dust is transported and deposited not only in the vicinity of the most downstream of 64 but also on the front lid 26 side, which is the front side of the dust collecting container 20, along the arc of the dust collecting container 20 on the extension of the inlet 30 from the inlet 30. I will let you.

  Here, the air flow that has flowed into the dust collection container 20 includes a first air flow 73 that flows from the most downstream side of the first filter 64 to the upstream side of the second filter 21 in the dust collection container 20, and the front side of the dust collection container 20. The second airflow 74 that flows toward the front lid 26 is generated. This first airflow 73 is electrically driven along the straight part of the airflow flowing into the dust collecting container 20 from the inlet 30 of the dust collecting case 5 substantially in parallel with the straight line part constituting the lower dust accommodating part 20B. Since it flows linearly toward the blower, the kinetic energy loss of the wind can be prevented, the ventilation loss can be reduced, and the dust collecting container along the arc that forms the lower dust accommodating piece 20B by the second air flow 74 The flow velocity of the dust-containing air conveyed to the front lid 26 side of 20 can be increased. As a result, the second air flow 74 whose speed is increased by the first air flow 73 can improve the compressibility of the dust accumulated on the front lid 26 side, which is the front side of the dust container 20, and accumulates a large amount of dust. The suction force can be maintained even when the air volume of the cleaner body 2 is reduced.

  Note that an air flow that passes through the first filter 64 near the front lid 26 in the dust container 20 is also generated by the second air flow 74, and dust accumulates so as to cover the entire first filter 64. That is, even when dust collects in the dust collecting container 20, the air flow that has passed through the first filter 64 gradually gathers from the upstream side to the downstream side of the flow path 38, and thus flows through the flow path 38. The air volume of the air flow gradually increases from the upstream side to the downstream side. For this reason, since the flow path 38 becomes an enlarged flow path, a large increase in speed can be prevented in the flow path 38, and a ventilation loss can be reduced.

  Further, as shown in FIG. 7, the flow path inner diameter of the inlet 30 of the dust collecting case 5 is expanded from the upstream side, which is the connecting portion side of the hose 12, toward the downstream side extending inward of the dust collecting container portion. When the shape of the airflow is increased, the airflow loss due to rapid expansion when the airflow flows into the dust collecting container 20 from the inlet 30 can be reduced.

  Furthermore, since the flow velocity of the air flow flowing into the second filter 21 at the most downstream of the flow path 38 is reduced and the appearance of a locally fast portion can be prevented, an increase in ventilation loss when passing through the second filter 21 can be prevented. It is possible to suppress the suction work rate. In addition, since a locally fast portion can be prevented from appearing in the distribution of the airflow flowing into the second filter 21, it is possible to reduce the amount of dust blown through without being collected by the second filter 21. As a result, the dust collection efficiency of the dust collecting case 5 can be improved, the exhaust from the cleaner body 2 can be cleaned, and the fine dust can be prevented from flowing into the electric blower. The failure of the electric motor unit can be suppressed.

  In addition, since the dust collection case 5 is configured to expand from the front lid 26 side which is the upstream side to the second filter 21 side which is the downstream side, the filter area of the second filter 21 may be increased. it can. As a result, the flow velocity of the air flow passing through the second filter 21 can be reduced, so that ventilation loss can be reduced and the dust collection efficiency of the second filter 21 can be improved.

  Moreover, since dust can be conveyed not only to the 1st filter 64 which is a ventilation | gas_flowing part but to the front cover 26 side which is a non-venting part among the dust collection containers 20, the clogging by the dust of the 1st filter 64 is carried out. In addition, it is possible to improve the amount of dust stored in the dust collecting container 20.

  Further, since the upstream of the flow path 38 formed between the dust collecting case 5 of the dust collecting container 20 and the outside of the dust collecting container 20 extends to the vicinity of the front lid 26, even if dust is sucked into the dust collecting container 20, airflow loss is caused. It is also possible to reduce the increase in the pressure of the vacuum cleaner 1 and to suppress the decrease in the suction force of the vacuum cleaner 1. Note that the cross-sectional shape of the dust collecting container 20 may be configured using a part of an ellipse instead of an arc, or a smoothly changing curve, or a bowl shape.

  On the rear side of the dust collecting case 5, a second filter 21 having a filter pleated into a waveform is provided. The second filter 21 is collected by a rotating shaft 23 as shown in FIGS. The case 5 can be opened and closed. A lower part of the second filter 21 is rotatably supported by a lower part of the dust collecting case 5 by a rotating shaft 23, and an upper part is locked to a hook 22 provided on the upper part of the dust collecting case 5. When the hook 22 is unlocked by pressing the operation button 32 for operating the hook 22, the second filter 21 is opened with the lower rotation shaft 23 as the rotation center. The second filter 21 is, for example, a high-density HEPA filter (High Efficiency Particulate Air Filter). A HEPA filter is an air filter having a particle collection rate of 99.97% or more with respect to particles having a rated air volume of 0.3 μm and an initial pressure loss of 245 Pa or less.

  The dust collecting container 20 collects large coarse dust by the first filter 64 by filtration. Fine fine dust passes through the dust collection container 20 and is collected by filtration with the second filter 21. The dust removal unit 7 has a dust removal rotating body 24 as shown in FIG. The dust removal rotating body 24 rotates in accordance with the unwinding of a power cord (not shown) wound around a cord reel (not shown), and the reinforcing portion 33 provided on the second filter 21 is used as a guide 34. The fine dust collected by the second filter 21 is removed from the second filter 21 by vibrating along with it. The fine dust removed from the second filter 21 falls downward, and a part of the dust 68 slides on the slope 68 provided below the second filter 21 shown in FIG. It is stored in a fine dust container 51 (described later) provided at the bottom of the case 5. In addition, when the air flow passes through the dust collection case 5 by the operation of the vacuum cleaner 1, the fine dust container 51 rescatters the fine dust removed and reattaches to the second filter 21. It is desirable to be configured to prevent this. Here, when the front lid 26 is closed, the second disposal port 67 on the upstream side of the fine dust container 51 may be covered with the elastic seal member 52 provided in the front lid 26. Good.

  The dust collecting container 20 includes a support frame 63 that maintains the outer shape, and a first filter 64 that is stretched on the inner wall surface of the support frame 63. There is an opening between the fulcrum 63. Therefore, the top, bottom, left and right wall surfaces and the back side wall surface of the dust collection container 20 are also partially opened, and the top, bottom, left and right wall surfaces and the back side wall surface are also closed when the front opening of the dust collection container 20 is closed by the front lid 26. Ventilation is possible. The support 63 is preferably made of a resin such as ABS resin or a metal such as stainless steel. Therefore, since the support 63 is formed of such a hard material, its shape can be maintained, and it does not swell or deform significantly like a paper pack. The first filter 64 is composed of a mesh-like net filter, a metal net, a metal plate having a minute hole, a plastic plate having a minute hole, etc. Collect by filtration. In order to improve dust separation, the first filter 64 may be made of a highly conductive metal such as stainless steel, or may be a chemical fiber such as polyester or nylon obtained by sputtering metal particles such as stainless steel. In the first filter 64, the portion provided in the arc portion of the lower dust accommodating portion 20B on the extension of the inflow port 30 is pointed and has no holes because the sucked dust is easy to hit directly. Thus, it is more preferable to use a net made of a metal such as stainless steel for the first filter 64 in this portion. The user can also attach tissue paper along the inner wall surface of the first filter 64. If the corner of the tissue paper is sandwiched between the support frame 63 and the front lid 16 at the outer edge of the opening of the dust collecting container 20, the tissue paper can be held.

  Here, the air flow that has flowed into the dust collecting container 20 generates a vortex in the dust collecting container 20, but the flow that has passed through the dust collecting container 20 is rectified by the first filter 64 and flows into the dust collecting container 20. leak. That is, since a locally fast portion can be prevented from appearing in the distribution of the air flow flowing into the second filter 21, an increase in ventilation loss when passing through the second filter 21 can be suppressed, and the second filter 21. Since the amount of dust that blows through without being collected in can be reduced, the collection efficiency can be improved.

  It should be noted that light and fluffy fiber dust such as cotton dust collected in the dust collection container 20 is likely to be compressed and compressed by the air flow passing through the dust collection container 20. During operation of the vacuum cleaner 1, the dust collection container 20 is pushed toward the second filter 21, which is an electric blower (not shown) side, by the fiber dust compressed and solidified in the dust collection container 20. . The support 63 provided in the dust collecting container 20 not only attaches the first filter 64 but also increases the strength of the dust collecting container 20, so that deformation of the dust collecting container 20 can be suppressed, and the dust collecting container 20 There is also an effect of preventing dust from spilling from between the dust container pieces 20A and 20B.

  In addition, since the fiber dust such as cotton dust collected in the dust collection container 20 tends to become a mass compressed in the dust collection container 20, the fine dust that has flowed into the dust collection container 20 due to this mass of fiber dust. Some of the dust is also collected. When the operation of the electric vacuum cleaner is stopped, the compressed dust lump loses the compressive force due to the air flow, the compressed dust lump spreads, and the dust lump volume increases.

  However, the dust container 20 is expanded toward the dust disposal port 65, and when the accumulated dust is thrown away, the two dust container portions 20A and 20B are opened so as to expand the dust disposal port 65. Even when a mass of compressed dust stored in the dust container 20 spreads, it can be easily discharged from the dust disposal port 65. When the dust is discarded, the dust sucked into the dust collecting container 20 is likely to be compressed into a lump due to the air flow. Therefore, when the dust is discharged from the dust collecting container 20 through the dust disposal port 65, the dust is discharged as a lump. The first filter 64 provided in the dust collecting container 20 is less likely to be clogged with little adhesion and entanglement of dust. For this reason, it is possible to prevent the trouble of removing the dust from the first filter 64 only by throwing away the dust accumulated in the dust collecting container 20. In addition, since the dust collection container 20 is formed on the circular arc, it is possible to suppress dust adhesion and entanglement.

  In addition, a part of fine dust such as dust that has flowed into the dust collection container 20 is also collected by the fiber dust compressed and solidified in the dust collection container 20, and the fiber dust wraps the fine dust. Therefore, when the dust accumulated in the dust collecting container 20 is discarded, the fine dust does not rise and is hygienic. A part of fine dust such as dust flowing into the dust collecting container 20 is also collected, and the fiber dust wraps the fine dust. Therefore, the first filter 64 provided in the dust collecting container 20 with the fine dust. Suppresses clogging. As a result, it is possible to suppress a decrease in the air volume when the electric vacuum cleaner is operated, and it is possible to suppress a decrease in suction force, and thus it is possible to suppress a decrease in the ability to suck dust on the surface to be cleaned.

  Since the dust disposal port 65, which is an opening provided on the upstream side of the dust collecting container 20, is larger than the inlet 30 of the dust collecting case 5, the dust flowing into the dust collecting container 20 from the inlet 30 is When it is discarded from the dust collecting container 20, it is possible to prevent clogging with the dust disposal port 65. Further, if the dust disposal port 65 is enlarged, the volume of the dust collecting container 20 can be increased even if the depth direction of the dust collecting container 20 is shortened, so that the depth (length) of the cleaner body 2 can be reduced. Can be downsized.

  As shown in FIG. 13, the lower dust accommodating portion 20 </ b> B is rotatably supported by the base component 69 by the rotation shaft 41. When the dust collection container 20 and the base part 69 are attached in the dust collection case 5, the rotation shaft 41 is located inside the flange 42 in which the opening 25 is formed in the dust collection case 5. To position. The rotation shaft 41 and the rotation shaft 27 of the front lid 26 are located on the front side of the dust collecting case 5 and are provided in the vicinity adjacent to each other. For this reason, the opening / closing operation | movement of the front cover 26 and the dust accommodating part piece 20B is gathered together, and is performed smoothly. A rotating shaft 27, which is a support portion for the front lid 26 that supports the front lid 26 so as to be freely opened and closed, is arranged on the outer peripheral portion of the dust collecting case 5, and a dust accommodating portion is provided to support the dust collection container 20 so as to be freely opened and closed. A rotating shaft 41 provided on the piece 20 </ b> B is provided inside the dust collecting case 5. Since it arrange | positions in this way, the airtight of the front cover 26 and the dust collecting case 5 should just provide the elastic body sealing member 52 attached to the front cover 26. FIG.

  Since the elastic seal member 52 does not need to straddle the rotation shaft 27 that rotatably supports the front lid 26, the elastic seal member 52 contacts the elastic seal member 52 when the dust collecting case 5 and the front lid 26 are airtight. Since the part 53 is comprised on substantially the same plane, it is easy to take airtightness. Furthermore, since the elastic body sealing member 52 can be configured not to straddle the rotation shaft 41 that rotationally supports the dust collection container 20, the elastic body sealing member 52 seals between the front lid 26 and the dust collection container 20. In this case, the A contact portion 54 provided on the elastic body seal member 52 and the dust container portion 20A and the B contact portion 55 provided on the elastic body seal member 52 and the dust container portion piece 20B are substantially the same plane. Since it is configured above, it is easy to take airtightness. Further, the air seal between the front lid 26 and the dust collecting case 5 can be secured with one elastic seal member 52, and the air tightness between the front lid 26 and the dust container 20 A constituting the dust collecting container 20 can be secured. And the airtightness of the dust accommodating part 20B which comprises the dust collecting container 20 is securable. In addition, since the contact portion with the elastic seal member 52 provided on the front lid 26 can be configured on substantially the same plane, a force only in the direction for urging the front lid 26 toward the dust collecting case 5 is used. And the dust collecting case 5 can be provided, and a structure that hardly causes air leakage can be obtained, so that a reduction in suction work rate and spillage of dust can be prevented. Further, when the front lid 26 is closed, the second disposal port 67 which is the front side of the fine dust container 51 is configured to be covered with the elastic seal member 52 provided in the front lid 26. It is also possible to prevent the dust flowing in from 30 from being short-circuited to the second filter 21 without passing through the dust collecting container 20. In addition, by making the contact portion with the elastic seal member 52 provided on the front lid 26 common on substantially the same plane, the position between the front lid 26 and the dust collecting container 20 during the opening and closing operation. There is no deviation, and the opening / closing operation of the front lid 26 and the dust collecting container 20 can be performed more smoothly.

  Further, the upper dust accommodating piece 20A is slidably supported on the inner surface of the opening 25. With this slidable support, the dust accommodating piece 20A slides in and out of the dust collecting case 5. Operates as follows. Since it is configured in this way, by releasing the locking of the clamp member 29 restrained in a closed state of the front lid 26, the front lid 26 falls down to the front side, and the two dust container pieces 20A, the dust container The piece 20B is opened so as to expand the dust disposal port 65. That is, the projecting biasing spring 43 biases the dust accommodating portion 20B to push it out of the dust collecting case 5, and also the two dust accommodating portion 20A and the dust accommodating portion 20B so as to expand the dust disposal port 65. It is also possible to serve as a release biasing spring for releasing the. In addition, it is also possible to provide a protruding means that pushes the dust collecting container portion outward by a motor or a human operating force instead of the protruding biasing spring.

  Here, as shown in FIG. 13, the protrusion biasing spring 43 is provided at the lower front side of the lower dust accommodating piece 20B. The protrusion urging spring 43 is applied so as to push out the lower dust accommodating portion 20B to the outside of the dust collecting case 5 when the dust collecting container 20 and the base part 69 are mounted in the dust collecting case 5. It is fast. The protrusion biasing spring 43 is formed by a helical spring, and a central portion is received by a spring locking portion provided in the lower dust accommodating portion piece 20 </ b> B, and both ends are engaged with the base component 69. Due to the protrusion biasing spring 43, the lower dust accommodating portion 20B is given a rotational force in a direction protruding from the dust collecting case 5. The periphery of the protrusion biasing spring 43 may be separated from the dust container by using the partition wall 71 so that the dust does not easily adhere. In this case, the number of second disposal ports 67 is two, but it does not matter. At this time, since the opening area of the fine dust container 51 is smaller than that of the opening on the second filter 21 side on the opposite side on the front lid 26 side, the dust is pushed out by the weight of the dust in the fine dust container 51. Since it discharges | emits, the fine dust in the fine dust accommodating part 51 is easy to discard and preferable.

  The fine dust accumulated in the fine dust container 51 opens the front lid 26 provided on the front side of the dust collecting case 5 from the dust collecting case 5 as shown in FIG. 8 and FIG. The second discard port 67 that is the opening of the accommodating part 51 is preferably opened and discarded. At this time, since the dust contained in the dust collecting container 20 can be discarded together, the dust can be easily discarded. Here, when the front lid 26 is made of a transparent resin material or the like, the user opens the upper lid 8 of the cleaner body 2 and accumulates in the dust collecting container 20 in the dust collecting case 5 through the front lid 26. Since the amount of dust can be visually confirmed, it is easier to determine the timing of throwing away the dust, which is more preferable. In addition, since the rotating shaft 27 of the front lid 26 is on the lower side of the dust collection case 5, the user confirms that the fine dust is discarded from the fine dust container 51 through the second disposal port 67, Can be discarded.

  Here, when the fine dust container 51 serving as a passage through which fine dust passes is long, the fine dust container 51 is provided on the front side of the dust collecting case 5 through the fine dust container 51 that removes and stores the dust attached to the second filter 24. When the fine dust adheres to the wall surface of the fine dust container 51 when the front lid 26 is opened and the fine dust is thrown away from the second disposal port 67, which is an opening, as shown in FIGS. In addition, the remaining fine dust can be discarded from the dust collection case 5 from the downstream side of the dust collection case 5 by opening the second filter 24. The lower part of the second filter 21 is rotatably supported by the lower part of the dust collecting case 5 by a rotating shaft 23, and the upper part is locked to a hook 22 provided on the upper part of the dust collecting case 5. When the hook 22 is released by pressing the operation button 32, the second filter 21 is opened with the lower rotation shaft 23 as the rotation center. In other words, the fine dust can be discarded from the dust collection case 5 through the opening on the second filter side without removing the second filter 21 from the dust collection case 5, so that the dust can be prevented from rising and sanitized. is there.

  In this state, the dust collecting case 5 and the fine dust container 51 can be cleaned with water. At this time, the dust collection case 5 and the fine dust container 51 are provided with two openings in the front-rear direction, and are arranged so that the projection surfaces of these openings overlap each other, so that water does not collect during washing. Since it is difficult for dust to flow out and remain, it can be easily washed, drained well, and the drying time can be shortened.

  Further, the dust collecting container 20, the projecting biasing spring 43, and the base part 69 are integrally supported in a dust-supported state in a state where they are pivotally supported by pressing the convex portion 72 provided on the base part 69 toward the front lid 26. Since it can be removed from 5, it can be easily cleaned. Further, when it is desired to wash the dust collecting container 20, it can be easily washed with the dust collecting case 5 removed from the dust collecting case 5, and the drying time is relatively short.

  The drop-off prevention member 45 of the drop-off prevention means is attached to the outside of the upper dust accommodating piece 20A, and has an opening 46 on the inside, preventing the dust from dropping off without reducing the suction force of the vacuum cleaner. The frequency of attaching to the member 45 can be reduced.

  The drop-off prevention member 45 comes into contact with the flange 42 when the upper dust container piece 20A and the lower dust container piece 20B are opened when the dust container 20 is attached to the dust collection case 5. It is configured. The drop-preventing member 45 comes into contact with the flange 42, whereby the upper dust container piece 20A is stopped. Since the upper dust accommodating piece 20A does not protrude further outward, when the dust accommodating piece 20A and the dust accommodating piece 20B constituting the dust collecting container 20 are expanded and the dust disposal port 65 is expanded, The dust container 20 does not fall off from the dust collection case 5.

  Further, when the dust collecting container 20, the projecting biasing spring 43, and the base part 69 are integrally removed from the dust collecting case 5 while being pivotally supported, the dust collecting container 20 is moved from this state toward the dust collecting case 5. As shown in FIG. 9 (b), the drop-off prevention member 45 is elastically deformed so as to get over the collar portion 42 of the dust collecting case. The drop-off prevention member 45 that has passed over the collar portion 42 of the dust collection case 5 is not deformed and returns to its original shape as shown in FIG. 9C, so that the dust container piece 20A is collected even when rotated in reverse. It does not come off the dust case 5.

  The drop-off preventing member 45 is made of an elastic molded force using an injection molded product made of polyacetal resin or ABS resin, but the same effect can be obtained by using various means such as metal parts and leaf springs. .

  That is, in the dust container 20, the lower dust container part 20 </ b> B is rotatably supported by the rotating part 41 on the base part 69 attached to the dust collection case 5, and the upper dust container part 20 </ b> A is opened. Since it is slidably supported by the portion 25, the dust collecting container 20 is configured not to fall off from the dust collecting case 5. A force that constantly pushes the dust collecting container 20 to the outside of the dust collecting case 5 is applied to the dust collecting container 20 by the protruding biasing spring 43. The front lid 26 stops the dust collection container 20 from protruding against the pushing force. Now, when the clamp member 29 of the restraining means for the front lid 26 is removed, the front lid 26 is opened so as to fall forward as shown in FIG. As shown in FIG. 9A, the dust collection container 20 held by the front lid 26 protrudes outside from the opening 25 of the dust collection case 5.

  With this protrusion, the upper dust container part 20A and the lower dust container part 20B are opened, and the dust disposal port 65 is enlarged. The dust accumulated in the dust collecting container 20 is discharged at once from the expanded dust disposal port 65. Further, the dust collecting container 20 is suddenly stopped by the drop-off preventing member 45 at the position where the dust collecting container 20 protrudes out of the dust collecting case 5 vigorously by the protruding biasing spring 43. It is easy to peel off, and the dust is more efficiently discharged from the dust collecting container 20, and the clogging of the first filter 64 can be prevented, so that a reduction in suction force can be prevented.

  The dust collection case 5 is composed of a case main body that opens on the front side and the rear side. As shown in FIGS. 4 and 5, the dust collection container 20 that has been disposed of is stored in the dust collection case 5. The enlarged dust disposal port 65 is narrowed down and stored in the dust collecting case 5, and the opening of the second disposal port 67 is also closed. Storage of the dust collecting container 20 is performed with the operation of closing the front lid 26. A rotation shaft 27 that is an opening / closing shaft of the front lid 26 and a rotation shaft 41 that is a rotation shaft of the dust collecting container 20 are disposed below the dust collection case 5 in the same direction with respect to the dust collection case 5. Therefore, the rotation direction when opening and closing the front lid 26 and the dust collecting container 20 can be made the same, and when the front lid 26 is closed, the dust collecting container 20 can be closed. That is, the dust disposal port 65 and the second disposal port 67 that are placed forward together with the opening 25 face the front lid 26. When the front lid 26 is closed, the inner surface side of the front lid 26 comes into contact with the dust disposal port 65 that is the front surface side of the dust collecting container 20. The dust collecting container 20 is pushed back into the dust collecting case 5 by being pushed by the front lid 26.

  The dust collecting container 20 is pushed back against the protruding biasing spring 43. The outer surface side of the upper dust accommodating piece 20 </ b> A is pushed and slid inside the opening 25. Therefore, as the upper dust container piece 20A enters the dust collection case 5, it approaches the lower dust container part 20B and the dust disposal port 65 narrows, and the dust container 20 is placed in the dust collection case 5. It can be stored inside. In this way, the dust collection container 20 can be easily put in and out by opening and closing the front lid 26. Further, the dust collection container 20 can be taken in and out without touching the dust collection container 20, which is advantageous in terms of hygiene.

  Here, before attaching the dust collecting case 5 to the cleaner body 2, after putting a disposable dust collecting filter paper such as dust paper into the recess of the dust collecting container 20 with the front lid 26 opened, the front lid 26 is closed. For example, the dust collecting container 20 is pushed by the front lid 26 and disposed at a predetermined position in the dust collecting case 5. As shown in FIG. 12, the disposable dust collecting paper such as dust paper is attached in a state where the dust collecting container 20 is held by engaging the hook 36 of the clamp member 29 with the locking groove 37. One side of the dust collecting filter paper is hooked on the flange 36 of the clamp member 29, and the opposite side is pressed near the rotating shaft 27 side of the dust accommodating portion 20B. It is good to push it into the concave part side of and attach. Moreover, since the cross-sectional shape of the dust collection container 20 is formed in a substantially D shape, it is possible to easily attach a disposable dust collection filter paper such as dust paper to the concave portion of the dust collection container 20. At this time, the second disposal port 67 is also covered with disposable dust collecting paper such as dust paper.

  After this, if the dust collecting case 5 is attached to the cleaner main body 2 and the vacuum cleaner 1 is operated for cleaning, the dust sucked into the dust collecting container 20 is upstream of the first filter 64. Disposable dust collecting filter paper such as dust paper that has been disposed, and most of the sucked dust accumulate on the upstream side. In this state, the case where the dust collecting case 5 is taken out from the cleaner body 2 and the dust is discarded will be described. The dust sucked into the dust collecting container 20 tends to become a mass compressed by the air flow, and is therefore wrapped in a disposable dust collecting filter paper such as dust paper arranged upstream of the dust collecting container 20 and in the concave portion of the dust container 20. It is in the state. For this reason, even when dust is discharged through the dust disposal port 65, most of the dust is discharged in a lump state wrapped in a disposable dust collecting filter paper such as dust paper, so that no fine dust rises and is hygienic. Is. Here, since the cross-sectional shape of the dust collecting container 20 is substantially D-shaped, when the disposable dust collecting filter paper such as dust paper is discarded, the dust collecting filter paper such as dust paper is easily rounded and discharged. Therefore, it is more preferable because the rise of fine dust can be suppressed. Further, fine dust removed from the second filter 21 by flipping the reinforcing unit 33 provided in the dust removal unit 7 or the second filter 21 is stored in the fine dust container 51. When this fine dust is discarded, the handle 28 of the dust collecting case 5 is held with the front lid 26 side down and the second filter 21 side up. At this time, since the fine dust in the fine dust container 51 adheres to the disposable dust collecting filter paper such as dust paper near the second disposal port 67 and is discarded together, it can be discarded while suppressing the rising of the fine dust. it can. In addition, it is possible to suppress the adhesion of dust to the elastic body sealing member 52, and it is also possible to suppress a decrease in sealing performance.

  Here, the rotation shaft 27 of the front lid 26 is disposed closer to the second filter 21 side in the depth direction of the dust collecting case 5 than the contact portion 53 provided around the opening 25. For this reason, it is easy for the rotating shaft 27 to hold a disposable dust collecting filter paper such as dust paper. Further, since the rotating shaft 27 of the front lid 26 is arranged in this way, the outer diameter of the dust collecting case 5 itself is larger than when the rotating shaft 27 is separated from the opening 25 in the direction directly below the opening 25. A size can be made small and the vacuum cleaner main body 2 can be made small.

  In addition, the electric vacuum cleaner 1 is operated with the dust collecting case 5 attached to the cleaner body 2 before throwing away the trash, and a disposable collection of dust paper or the like from the tip of a hose (not shown) connected to the cleaner body 2 is performed. It is also possible to suck the dust filter paper and dispose of the dust after wrapping it with disposable dust filter paper such as dust paper on both the upstream and downstream sides of the dust sucked and accumulated in the dust collecting container 20. In this way, if a disposable dust collecting filter paper such as dust paper is arranged on the upstream side of the first filter 64 of the dust collecting container 20, it is difficult for dust to adhere to the first filter 64 and the first filter 64 is clogged. Therefore, a reduction in suction force can be prevented.

  In this way, the air flow in the dust collection case provided in the vacuum cleaner body is made smooth, the ventilation loss is small, the compressibility of the dust accumulated in the dust container is improved, and the dust collected in the dust collection case is reduced. A vacuum cleaner that can be easily discharged and maintained can be provided.

  Another example of the check valve 31 of the first embodiment will be described as a second embodiment. In the first embodiment, the check valve 31 has a planar shape, whereas in the second embodiment, the first feature is that the tip of the check valve 75 has a three-dimensional shape bent or curved upstream. And In the first embodiment, the central portion of each check valve 31 is supported by the inflow port 30 that is a frame body, whereas in the second embodiment, the check valve 75 located on the upper side has the check valve 75. The second feature is that the lower side of the center is supported by the inlet 30 which is a frame. Further, in the first embodiment, the support portion of the check valve 31 to the inflow port 30 that is a frame body has a planar shape, whereas in the second embodiment, the check valve to the inflow port 30 that is a frame body. A third feature is that 75 support portions have a three-dimensional shape with R (curvature) on the downstream side. In the second embodiment, the same reference numerals as those in the first embodiment have the same functions as those in the first embodiment.

  FIG. 16 is a perspective view of the dust collection case with the front lid closed on the dust collection case, and FIG. 17 is a side sectional view of the dust collection case with the front lid closed on the dust collection case. FIG. 18 is a front view of the dust collection case with the front cover closed on the dust collection case. The vertical direction of the dust collecting case 5 corresponds to the vertical direction of the vacuum cleaner main body 2 when the vacuum cleaner main body 2 is placed horizontally (in use), and the front and rear direction of the dust collecting case 5 is horizontal to the vacuum cleaner main body 2. Corresponding to the front-rear direction of the cleaner body 2 when placed, the left-right direction of the dust collecting case 5 corresponds to the left-right direction of the cleaner body 2 when the cleaner body 2 is placed horizontally.

  As shown in FIGS. 16 and 17, a check valve 75 is provided at the outlet end (rear side) of the inlet 30 of the dust collecting case 5. The inflow port 30 is formed of a tubular member in which an air flow path is formed. The inflow port 30 includes a front portion and a rear portion, and the front portion of the inflow port 30 is formed integrally with the front lid 26 with the same material (for example, a hard material such as resin) as the front lid 26 (for example, injection molding). The rear portion of the inflow port 30 is preferably formed integrally with the check valve 75 (for example, injection molding) with the same material as the check valve 75 (for example, an elastic material such as rubber). As shown in FIG. 17, the outer edge of the rear portion of the inlet 30 is fitted into the front lid 26, so that the front end of the rear portion of the inlet 30 abuts the rear end of the front portion of the inlet 30, and The front portion and the rear portion of the inflow port 30 are hermetically connected by the elastic force of the. The check valve 75 may be disposed upstream of the outlet end (rear side) of the inflow port 30. The inflow port 30 is not divided into a front part and a rear part, but may be formed integrally. The inner surface of the inflow port 30, that is, the cross-sectional area of the flow path, may be uniform from the upstream side to the downstream side, or may gradually increase from the upstream side to the downstream side.

  As shown in FIG. 17, the central axis 100 of the inlet 30 is formed in the horizontal direction when the cleaner body 2 is placed horizontally. In other words, the central axis 100 of the inflow port 30 is inclined with respect to the straight portion 200 constituting the lower dust accommodating portion piece 20B. However, the central axis 100 of the inflow port 30 is formed substantially parallel to the straight line portion 200 that constitutes the lower dust accommodating portion piece 20B, as in the first embodiment. As a result, the central axis 100 of the inflow port 30 is In a state where the dust collection case 5 is housed in the dust collection case housing portion 9, the dust collection case 5 may be inclined upward toward the side where the central axis (rotary shaft) of the electric blower exists. The central axis 100 of the inflow port 30 passes through the center of the circular check valve 75. As shown in FIG. 18, the inflow port 30 is formed below the vertical center line 300 of the outlet opening (second filter 21) of the dust collection case 5 and is formed on the left and right center line 400 of the dust collection case 5. Is done. That is, the inflow port 30 is formed below the center in the vertical direction of the outlet opening of the dust collection case 5 that is an exhaust port through which the air flowing in from the inflow port 30 is discharged. Formed in the center. The fact that the inflow port 30 is formed below the center in the vertical direction of the exhaust port means that the center of the inflow port 30 is located below the center of the exhaust port. Since the inflow port 30 is formed below the center of the outlet opening of the dust collecting case 5 in the vertical direction, the air that has flowed out of the inflow port 30 goes slightly upward.

  19 is a view showing the rear part of the inlet and the check valve formed integrally, FIG. 19 (a) is a front view, FIG. 19 (b) is a back view, and FIG. c) is a sectional side view, and FIG. 19 (d) is a perspective view. The front lid 26 is in a closed state.

  The check valve 75 has a shape corresponding to the flow path in the inflow port 30 and closes the flow path in the inflow port 30. And the non-return valve 75 consists of three fan-shaped valve bodies. The vertices of the three valve bodies preferably substantially coincide with the center of the inner surface of the inflow port 30, that is, the intersection of the vertical center line 500 and the horizontal center line 600. One valve body is formed at the center in the left-right direction on the lower side of the inner surface of the circular inlet 30, and two valve bodies are formed on the upper left and right. That is, as shown in FIG. 19A, one valve body is formed on the left and right center line 600 below the upper and lower center line 500 of the inner surface of the inflow port 30, and the upper and lower centers of the inner surface of the inlet 30. Two valve bodies are formed above the line 500 with the left-right center line 600 as a boundary. The number of valve bodies constituting the check valve 75 may be two, or four or more. When the check valve 75 is configured by an odd number of valve bodies, the number of upper valve bodies is larger than the number of lower valve bodies, and the center in the left-right direction of the inlet 30 is the lower valve body. It is preferable to be located at the boundary between the upper and the upper valve body. The three valve bodies have the same shape, and the fan-shaped angle of each valve body is 120 degrees. In the state where the check valve 75 is closed, the arc portion of each valve element faces (preferably abuts) the inner surface of the inlet 30, and the side part of each valve element faces the side part of another valve element. Oppose (preferably abut).

  The two side portions 76 of the fan-shaped valve body are bent (bent) over the entire length on the upstream side (front side), that is, the side where the front portion and the rear portion of the inflow port 30 exist. However, the two side portions 76 do not need to be bent over the entire length, and only a part thereof, that is, only the tip (fan-shaped apex) side may be bent. The base of each valve body, that is, the arc portion, is also bent (bent) to the upstream side (front side), that is, the side where the front portion and the rear portion of the inflow port 30 exist. The bending width of the arc portion of the valve body is shorter than the bending width of the side portion 76 of the valve body. The bending width of the arc portion of the valve body is preferably shorter than half of the bending width of the side portion 76 of the valve body. This is because, when the valve body is open, the arc portion is on the upstream side, so if the bending width of the arc portion is increased, it does not contribute to the rotation or swinging of the valve body, but is sucked from the inlet 30 instead. This is because turbulence occurs in the air. However, the arc portion of the valve body may not be bent and may be planar. Further, the lower one valve body is supported at the rear end of the rear portion of the inflow port 30 so that the center portion of the arc portion can be rotated or swingable by the support portion 77. On the other hand, the upper two valve bodies are supported by the rear end of the rear portion of the inflow port 30 so that the lower side of the center portion of the arc portion can be rotated or swingable by the support portion 77. With reference to the inflow port 30, the support portion 77 of one lower valve body is formed on the lower side of the inner surface of the inflow port 30 and in the left and right center line 600. On the other hand, the support portions 77 of the upper two valve bodies are formed in the vertical center line 500 portion of the inner surface of the inflow port 30. The support portions 77 of the upper two valve bodies do not necessarily have to be formed in the upper and lower center line 500 portion of the inner surface of the inflow port 30 and may be lower than the central portion of the arc portion. The upper two valve body support portions 77 may be formed below the vertical center line 500 portion of the inner surface of the inflow port 30, for example, at the lower end portion of the arc portion of the valve body. The support portion 77 is preferably made of the same material as the rear portion of the inlet 30 and the check valve 75, and is preferably formed integrally with the rear portion of the inlet 30 and the check valve 75. When the support portion 77 is made of an elastic material like the rear portion of the inlet 30 and the check valve 75, the check portion 75 rotates with respect to the inlet 30 by elastically deforming the support portion 77. Or swing.

  FIG. 20 is a perspective view from the rear of the integrally formed inlet and the back surface of the check valve. 20A shows a state where the check valve 75 is closed, and FIG. 20B shows a state where the check valve 75 is opened. The three valve bodies rotate or swing toward the downstream side (rear side), that is, the inner side of the dust collecting case 5 with the support portion 77 as a fulcrum by the wind pressure of the air (which may contain dust) sucked from the inlet 30. Move and open (see FIG. 20B). On the other hand, since no wind pressure is generated in a state where no air is sucked in, the three valve bodies are closed by the action of the elastic force of the support portion 77 (see FIG. 20A).

  Since the side part 76 of the valve body is bent upstream, the valve body can easily capture the air sucked from the inflow port 30, so that the valve body can be easily opened. Although the flow of the air sucked from the inflow port 30 is disturbed by the bending of the side portion 76 of the valve body, the opening of the valve body results in the air inflow port 30 of the air sucked from the inflow port 30 as a result. Or the ventilation loss in the vicinity of the exit of the inflow port 30 can be reduced. Thereby, the suction work rate of a vacuum cleaner can be improved. Since the upper two valve body support portions 77 are formed below the center portion of the arc portion, the upper two valve bodies open in the left-right direction rather than the upper direction, and the upper two valve bodies are opened. The load lifted upward can also be reduced. Further, the opening area on the upper side of the upper and lower center line 500 becomes larger (the upper cross-sectional area of the flow path becomes larger), so that air loss near the outlet of the inlet 30 of the air sucked from the inlet 30 can be reduced. Thereby, the suction work rate of a vacuum cleaner can be improved. That is, the air that has exited from the inflow port 30 heads slightly upward. Therefore, the air that flows out of the inflow port 30 near the outlet of the inflow port 30 is larger when the upper side of the outlet 30 is larger. This is because loss can be reduced.

  FIG. 21 is a diagram showing one lower valve body. Fig.21 (a) is a front view, FIG.21 (b) is the sectional side view seen from aa in the aa part of Fig.21 (a).

  As shown in FIG. 21B, the tip of the valve body, that is, the side portion 76 is bent at an angle b with respect to the plane portion. The angle b is preferably any angle within the range of 40 degrees to 50 degrees, which is around 45 degrees, but may be larger than 0 degrees and smaller than 90 degrees. Instead of being bent suddenly, it may be gently bent or may be bent little by little. The angle at which the arc portion of the valve body is bent is preferably equal to or smaller than the angle b at which the side portion 76 of the valve body is bent. Further, as shown in FIG. 21 (b), the support portion 77 swells to the downstream side (rear side) with respect to the flat surface portion of the valve body, that is, the side on which the valve body rotates or swings by the wind pressure, And it has a gently curved shape (having R) on the downstream side. Since the support portion 77 swells to the rear side and is gently curved, the valve body can be easily opened, and air loss in the vicinity of the inlet 30 of the inlet 30 or the outlet of the inlet 30 can be reduced. Can be reduced. Thereby, the suction work rate of a vacuum cleaner can be improved. Even if the thickness of the support portion 77 is not reduced, the opening degree of the valve body with respect to the wind pressure can be increased. Further, it is possible to suppress the local concentration of stress, and to suppress the occurrence of cracks in the support portion 77 by opening the valve body widely or repeatedly opening and closing the valve body. Can be prevented from being damaged. Therefore, the durability of the check valve 75 can be improved.

5 Dust collection case 20 Dust collection container 20A, 20B Dust container piece 21 Second filter 23, 27, 41, 66 Rotating shaft 25, 46 Opening portion 26 Front lid 28 Handle 29 Clamp member 30 Inlet port 31, 75 Check Valve 32 Operation button 33 Reinforcement portion 34 Guide 36 鉤 37, 40 Locking groove 38 Channel 42 鍔 portion 43 Protruding biasing spring 45 Fall-off prevention member 51 Fine dust accommodating portion 52, 62 Elastic seal member 53 Abutting portion 54 A Contact portion 55 B Contact portion 63 Support frame 64 First filter 65 Dust disposal port 67 Second disposal port 68 Slope 69 Base component 70 Arrow 71 Partition 72 Projection 73 First air flow 74 Second air flow 76 Side portion 77 Support part 100 Center axis 200 Straight line part 300,500 Vertical center line 400,600

Claims (6)

In an electric vacuum cleaner comprising an electric blower, an inlet into which air sucked by the electric blower flows, and a valve that closes the inlet,
The valve is constituted by a plurality of valve bodies,
A vacuum cleaner, wherein a side portion of the valve body is bent or curved upstream. The vacuum cleaner according to claim 1, wherein
Side portions other than the bent or curved side of the valve body are also bent or curved upstream.
The electric vacuum cleaner characterized in that the bending or bending width of a side portion other than the side portion of the valve body that is bent or curved is shorter than the bending or bending width of the side portion of the valve body. In an electric vacuum cleaner comprising an electric blower, an inlet into which air sucked by the electric blower flows, and a valve that closes the inlet.
The valve is constituted by a plurality of valve bodies,
An electric vacuum cleaner, wherein a valve element disposed on an upper side of the plurality of valve elements is supported by the inlet at a position below a center of the valve element. The vacuum cleaner according to claim 3,
The valve body has a fan shape,
The vacuum cleaner, wherein the valve body arranged on the upper side is supported by the inflow port below the center of the arc portion of the valve body. In an electric vacuum cleaner comprising an electric blower, an inlet into which air sucked by the electric blower flows, and a valve that closes the inlet.
The valve is constituted by a plurality of valve bodies,
The valve body is supported by the inflow port by a support portion,
The vacuum cleaner characterized in that the support portion, one end of which is connected to the flat portion of the valve body and the other end of which is connected to the inflow port, swells downstream from the flat portion and has a curved shape . The vacuum cleaner according to claim 5,
The support part of the valve body is made of the same material as the valve body and a part of the inlet, and is formed integrally with the valve body and a part of the inlet. Machine.

Images