JP5681776B1 - Suction head and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction head and a vacuum cleaner that have excellent dust removal performance even in a carpet or the like while having low power consumption of the vacuum cleaner. A suction head 1 according to the present invention includes a bottom portion 20 that faces a surface to be cleaned G, a suction opening portion 10 that opens to the bottom portion 20, a joint 4 that is connected to the main body of the vacuum cleaner, and a suction opening portion 10. And a suction chamber 21 that communicates with the joint 4. The suction power is a value measured by the method of measuring the suction power in JIS C 9108, and the dust pickup rate is measured by removing dust from the carpet in the method of measuring the performance of a household vacuum cleaner in JIS C 9802. When the value is 5 reciprocations, the dust pickup rate / suction power (% / W) is 2.0 or more and 5.0 or less. [Selection] Figure 5

Description

  The present invention relates to a suction head used in a vacuum cleaner that sucks and removes dust on a surface to be cleaned, and a vacuum cleaner including the suction head.

  In recent years, an electric vacuum cleaner and its suction head for sufficiently removing dust on carpets and carpets (hereinafter referred to as carpets) have been proposed (for example, see Patent Document 1).

  According to such a vacuum cleaner, in order to sufficiently remove dust in the carpet or the like, an increase in the output of the electric blower for the purpose of improving the suction power by increasing the degree of vacuum in the main body of the vacuum cleaner, A rotary brush has been adopted for the purpose of improving the dust pickup rate in the suction head.

  However, increasing the power output of the electric blower increases the power consumption of the vacuum cleaner and has the disadvantages of increasing noise. In addition, the adoption of the rotating brush causes problems such as an increase in power consumption and noise by a motor for driving the rotating brush, an increase in the size and weight of the suction head.

  In particular, there is a strong demand for power saving in recent years for home appliances, and it is required to sufficiently remove dust even on carpets and the like while suppressing power consumption in vacuum cleaners.

JP 2012-24497 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a suction head and a vacuum cleaner that have excellent dust removal performance even when using a vacuum cleaner with low power consumption or on a carpet or the like.

[Application Example 1]
The suction head according to this application example is
A bottom facing the surface to be cleaned;
A suction opening that opens to the bottom;
A joint connected to the vacuum cleaner body side;
A suction chamber communicating the suction opening and the joint;
Have
The suction work rate is a value (W) measured by the method of measuring the suction work rate in JIS C 9108, and the dust pickup rate is obtained by removing dust from the carpet in the performance measuring method of a household vacuum cleaner in JIS C 9802. The ratio (dust pickup rate / suction work rate) of the dust pickup rate (%) to the suction work rate (W) is 2.0 or more and 5.0 or less when the measured percentage (%) at the time of 5 reciprocations The
The clearance between the surface to be cleaned and the bottom is 0.3 mm to 1.5 mm .

The suction power is an index indicating the capacity of the main body of the vacuum cleaner, and the dust pickup rate tends to increase as the suction power increases. According to this application example, when the dust pickup rate / suction work rate (% / W) is 2.0 or more and 5.0, an excellent dust pickup rate is achieved when the floor is a carpet or carpet. Can be realized.

  According to this application example, by reducing the gap, a suction head having a high dust pickup rate / suction work rate (% / W) can be realized even when the floor surface is a carpet or the like.

[Application Example 2 ]
The suction head according to this application example is
A bottom facing the surface to be cleaned;
A suction opening that opens to the bottom;
A joint connected to the vacuum cleaner body side;
A suction chamber communicating the suction opening and the joint;
Have
The suction power is a value (W) measured by the method of measuring the suction power in JIS C 9108, and the dust pickup rate is obtained by removing dust from the carpet in the performance measuring method of a household vacuum cleaner in JIS C 9802. The ratio (dust pickup rate / suction work rate) of the dust pickup rate (%) to the suction work rate (W) is 2.0 or more and 5.0 or less when the measured percentage (%) at the time of 5 reciprocations ,
The area of the side wall having a virtual three-dimensional shape composed of a side wall extending vertically from the surface to be cleaned to the upper surface with the suction opening as an upper surface and a bottom surface formed on the surface to be cleaned facing the upper surface is 140 mm ² to 8 mm.
It is characterized by being 00 mm ² .

According to this application example, when the dust pickup rate / suction work rate (% / W) is 2.0 or more and 5.0, an excellent dust pickup rate is achieved when the floor is a carpet or carpet. Can be realized. Furthermore, according to this application example, by the area of the side walls of the virtual three-dimensional shape is a substantial opening area of the suction head is 140mm ² ~800mm ^2, high dust pickup even if the floor is carpeted, etc. Suction head having a rate / suction work rate (% / W) can be realized.

[Application Example 3 ]
In the above suction head,
The suction chamber has a wall portion that rises upward from the suction opening,
The wall portion has side wall portions on both ends in the width direction of the suction head,
The side wall portion may have a plate-like end portion on the suction opening side.

  According to this application example, since the side wall portion of the suction opening portion is configured in a plate shape, the end portion of the side wall portion easily enters between piles such as carpets. Thereby, the clearance gap between a to-be-cleaned surface and a bottom part can be made small. Therefore, a suction head having a high dust pickup rate / suction work rate (% / W) can be realized even when the floor surface is a carpet or the like.

[Application Example 4 ]
In the above suction head,
The suction chamber may have a rear wall portion in which an end portion on the rear wall opening portion side of the suction opening portion is configured in a plate shape.

  According to this application example, since the end on the rear wall opening side of the suction opening has the rear wall portion configured in a plate shape, the end on the rear wall opening side of the suction opening is carpet or the like. Easy to get in between the piles. Thereby, the clearance gap between a to-be-cleaned surface and a bottom part can be made small. Therefore, a suction head having a high dust pickup rate / suction work rate (% / W) can be realized even when the floor surface is a carpet or the like.

[Application Example 5 ]
The vacuum cleaner according to this application example is
A vacuum cleaner body having an electric blower;
A cylindrical suction pipe connected to the vacuum cleaner body;
Any one of the above suction heads connected to the tip of the suction tube;
It is characterized by comprising.

According to this application example, it is possible to realize a vacuum cleaner having a high dust pickup rate / suction work rate (% / W) even when the floor surface is a carpet or the like.

  The suction head according to the present invention can have a high dust pickup rate / suction work rate (% / W) even when the floor surface is a carpet or the like.

  Moreover, according to the vacuum cleaner concerning this invention, even when a floor surface is a carpet etc., it can have a high dust pick-up rate / suction work rate (% / W).

It is a perspective view of the vacuum cleaner concerning one Embodiment of this invention. It is a top view of the suction head concerning one embodiment of the present invention. It is a bottom view of the suction head concerning one Embodiment of this invention. It is a front view of the suction head concerning one Embodiment of this invention. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is a perspective view which shows a virtual solid shape typically. It is the partially expanded sectional view which looked at the side wall part of the suction head concerning one Embodiment of this invention from the front. It is a partial enlarged view of the side wall part of the conventional suction head. It is the partially expanded sectional view which looked at the rear wall part of the suction head concerning one Embodiment of this invention from the side surface. It is a partial enlarged view of the rear wall part of the conventional suction head. It is a perspective view of the vacuum cleaner concerning other embodiments of the present invention. It is a graph which shows the relationship between a clearance gap and a dust pick-up rate. It is a graph which shows the relationship between a suction work rate and a dust pick-up rate.

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

  A suction head according to an embodiment of the present invention includes a bottom portion that faces a surface to be cleaned, a suction opening portion that opens to the bottom portion, a joint that is connected to the main body of the vacuum cleaner, and the suction opening portion and the joint that communicate with each other. Measuring the performance of a household vacuum cleaner according to JIS C 9802, wherein the suction power is a value (W) measured by the suction power measurement method in JIS C 9108 The ratio of dust pickup rate (%) to suction work rate (W) (dust pickup rate / suction work rate) is 2 when the percentage (%) at the time of 5 reciprocations measured by removing dust from the carpet of the method is 2. 0.0 or more and 5.0 or less.

  The vacuum cleaner according to one embodiment of the present invention is connected to a vacuum cleaner body having an electric blower, a cylindrical suction pipe connected to the vacuum cleaner body, and a tip of the suction pipe. And the suction head.

  FIG. 1 is a perspective view of a vacuum cleaner 70 according to an embodiment of the present invention. FIG. 2 is a plan view of the suction head 1 according to one embodiment of the present invention. FIG. 3 is a bottom view of the suction head 1 according to an embodiment of the present invention. FIG. 4 is a front view of the suction head 1 according to an embodiment of the present invention. 5 is a cross-sectional view taken along line AA in FIG. 6 is a cross-sectional view taken along the line BB in FIG.

As shown in FIG. 1, an electric vacuum cleaner 70 according to an embodiment of the present invention includes an electric vacuum cleaner main body 71 having an electric blower (not shown), and a cylindrical suction tube 75 connected to the electric vacuum cleaner main body 71. And a suction head 1 connected to the tip of the suction pipe 75. The suction head 1 is connected to the vacuum cleaner 70 through a bellows-like hose 72 as a suction pipe 75 and a rigid synthetic resin extension pipe 73. The suction head 1 is connected to the front end of the extension pipe 73, the rear end of the extension pipe 73 has a handle 74, and the front end of the hose 72 is connected. The hose 72 is provided with a rigid synthetic resin connecting portion 76 at the rear end thereof, and the connecting portion 76 is connected to the electric vacuum cleaner main body 71.

  The hose 72 and the extension pipe 73 have a hollow cylindrical shape, and negative pressure is applied when the air inside is sucked and discharged by an electric blower (not shown) disposed inside the electric vacuum cleaner main body 71. Thus, a suction air flow can be generated in the suction head 1 and the suction pipe 75.

  The handle 74 is provided with an operation switch (not shown), and for example, operations such as turning on and off the electric blower and switching the strength of the suction force are possible. The user can operate by moving the suction pipe 75 and the suction head 1 with respect to the surface to be cleaned by grasping the handle 74.

  As shown in FIGS. 2 and 3, the suction head 1 includes a joint that is connected to the upper cover 1 a and the lower cover 1 b extending in the width direction of the suction head 1 and the extension pipe 73 of the electric vacuum cleaner main body 71 shown in FIG. 1. 4 and the shape in plan view is substantially T-shaped. In the present specification, the vertical direction is described with the floor surface side in the state where the surface to be cleaned is cleaned by the suction head 1 as the lower side, and the front and rear direction is described with the side with the joint 4 communicating with the extension pipe 73 as the rear side. The width direction will be described as a direction orthogonal to the front-rear direction and the vertical direction.

  The lower cover 1b is made of a synthetic resin and has a substantially rectangular frame shape with through holes penetrating vertically. The lower surface of the lower cover 1 b is the bottom 20 of the suction head 1. The opening on the bottom 20 side of the through hole of the lower cover 1 b is the suction opening 10.

  The upper cover 1a is made of synthetic resin and is placed and fixed like a lid that covers the through hole of the lower cover 1b from above. The upper surface of the upper cover 1 a is the upper wall portion 2 of the suction head 1. A projecting portion 2a extending from the upper wall portion 2 to the mounting portion 3 and projecting upward is formed at the center in the width direction of the upper cover 1a.

  The joint 4 is made of synthetic resin, and is attached so as to be sandwiched between the upper cover 1a and the lower cover 1b at the attachment portion 3 that is the central portion in the width direction of the suction head 1 and protrudes rearward. The joint 4 is rotatable about the longitudinal axis of the joint 4 with respect to the mounting portion 3.

  As shown in FIG. 3, the suction head 1 includes a bottom 20 that is a surface to be cleaned, for example, a floor surface (hereinafter, the surface to be cleaned is simply referred to as “floor surface”), and a suction opening 10 that opens to the bottom 20. And two front wheels 6 a in front of the bottom portion 20, and two rear wheels 6 b at the rear end of the mounting portion 3. A suction chamber 21 that communicates the suction opening 10 and the joint 4 is formed inside the suction head 1.

  The suction opening 10 is formed over the entire width direction of the suction head 1, and a suction force can be generated in the entire width of the suction head 1. The suction opening 10 has a front edge 10a on the front side of the suction head 1, side edges 10b and 10b on both ends in the width direction of the suction head 1, and a rear edge 10c on the rear side of the suction head 1. These connect to form an annular opening. The suction opening 10 is wide in the front-rear direction at the central portion of the suction head 1, and narrower in the front-rear direction at both end portions in the width direction of the suction head 1.

  The front edge 10a is formed so as to avoid the front wheels 6a, 6a arranged near both front ends of the suction head 1. The trailing edge 10 c is formed to extend linearly in the width direction of the suction head 1. The side edges 10b and 10b are portions that connect the front edge 10a and the rear edge 10c, and are shorter than the front edge 10a and the rear edge 10c. The side edges 10b and 10b have a suction groove 22 near the rear edge 10c. The suction groove 22 will be described later with reference to FIGS. 5 and 6, but the suction opening 10 is slightly formed on both sides of the suction head 1 and upward by forming the suction grooves 22 in the side edges 10 b and 10 b. spread.

  The bottom portion 20 is formed on the lower surface of the suction head 1 so as to surround the suction opening 10 and faces the floor surface. The bottom portion 20 includes a front end portion 20 a on the front side of the suction head 1, side portions 20 b and 20 b on both ends in the width direction of the suction head 1, and a rear end portion 20 c on the rear side of the suction head 1. The portions facing the suction opening 10 in the front end portion 20a, the side portions 20b and 20b, and the rear end portion 20c are the front edge 10a, the side edges 10b and 10b, and the rear edge 10c, respectively.

  The front wheels 6a, 6a are rotatably mounted near both ends in the width direction of the front end portion 20a, and can roll in the front-rear direction of the suction head 1. The rear wheels 6b, 6b are rotatably attached to the rear end of the attachment portion 3, and can roll in the front-rear direction of the suction head 1 in the same manner as the front wheels 6a, 6a.

  The rear end portion 20 c can further include a raised portion 23. The raised portion 23 is a synthetic fiber that is raised from the rear end portion 20c toward the floor surface in the vicinity of the center in the width direction of the rear end portion 20c. The raised portion 23 may have a static electricity removing function that adsorbs dust such as a lint brush. The length in the width direction of the raised portions 23 can be 20 mm to 40 mm, and further can be 25 mm to 35 mm. The vicinity of the center of the rear end portion 20c in the width direction is located farthest from each of the wheels 6a and 6b, and is near the attachment portion 3 that is easily loaded by the joint 4 during cleaning. Therefore, by providing the raised portions 23 here, even if the suction head 1 has a small gap between the bottom portion 20 and the floor surface, the bottom portion 20 is deformed and the vicinity of the center of the rear end portion 20c directly contacts the floor surface. There is nothing. Accordingly, the raised portion 23 has a function of preventing the floor surface from being damaged by the rear end portion 20c coming into contact with the floor surface. The raised portions 23 are not shown in other drawings.

  As shown in FIG. 4, in the suction head 1, the front wheels 6 a and 6 a and the rear wheels 6 b and 6 b are grounded to the floor G during cleaning. There is a gap H between the floor G and the bottom 20. The gap H can be from 0.3 mm to 1.5 mm, can further be from 0.5 mm to 1.5 mm, in particular from 0.5 mm to 1.0 mm. By reducing the gap H in this way, a suction head having a high dust pickup rate / suction work rate (% / W) can be realized even when the floor G is a carpet or the like.

  The suction power is an index representing the ability to suck air in the vacuum cleaner, and is the maximum value of the aerodynamic power curve. Since the suction power is measured with the suction head removed, the performance of the suction head is not considered. The suction power is measured according to JIS C 9108 Annex A “Measurement Method of Suction Power” and is calculated by the following formula.

Suction work rate A (W) = 0.01666 × air volume Q (m ³ / min) × vacuum degree h _s (Pa)
The dust pick-up rate can be measured according to JIS C 9802 “Performance measurement method for household vacuum cleaners” prepared based on the standard IEC 6031 established by the International Electrotechnical Commission. Represent. There are six measurement methods in JIS C 9802. In this embodiment, the dust pickup rate (%) is measured in accordance with “removing dust from carpets”. The measurement method for “removing dust from the carpet” is to suck the dust on the floor of the carpet at a constant speed, operation and frequency (5 reciprocations), and measure the amount of removed dust in percentage. To do.

  The suction power is a value (W) measured by the method of measuring the suction power in JIS C 9108, and the dust pickup rate is obtained by removing dust from the carpet in the performance measuring method of a household vacuum cleaner in JIS C 9802. The ratio of dust pickup rate (%) to suction work rate (W) (dust pickup rate / suction work rate) is 2.0 or more and 5.0 or less when the measured percentage is 5% (%). .

  The suction work rate is an index indicating the ability of the vacuum cleaner main body 71, and the dust pickup rate also tends to increase as the suction work rate increases. According to the suction head 1 of the present embodiment, the ratio of the dust pickup rate to the suction work rate (hereinafter referred to as “dust pickup rate / suction work rate (% / W)”) is 2.0 or more and 5.0 or less. Thus, it is possible to realize the suction head 1 that achieves an excellent dust pickup rate when the floor surface is a carpet or carpet.

  Further, the suction head 1 can have a dust pickup rate / suction power (% / W) of 2.2 or more and 4.8 or less.

  The dust pickup rate / suction power (% / W) in this range can be achieved when the suction power is as low as 10 (W) to 30 (W). Since a high dust pick-up rate can be achieved in a relatively low suction power range, a reliable dust removal capability can be obtained even with a low power consumption vacuum cleaner.

  As shown in FIGS. 5 and 6, the suction chamber 21 formed inside the suction head 1 is a space that communicates the suction opening 10 and the joint 4. The suction chamber 21 has a wall portion 24 that rises upward from the suction opening 10. The wall portion 24 includes a lower wall portion 25 of the lower cover 1b and an upper wall portion 26 of the upper cover 1a connected to the lower wall portion 25. The suction chamber 21 is formed by the upper wall portion 2 and the inner wall surface of the wall portion 24. The wall 24 includes a first front wall 24a and a second front wall 24d that rise upward from the front edge 10a of the suction opening 10, and a side wall 24b that rises upward from the side edge 10b of the suction opening 10. And a rear wall 24c in which a rear edge 10c, which is an end of the suction opening 10 on the rear wall opening 12 side, is formed in a plate shape. The rear wall portion 24 c rises from the suction opening portion 10 toward the rear wall opening portion 12 while being curved like a bow. Further, in the example shown in FIG. 5, the rear wall portion 24 c extends horizontally from the rear edge 10 c of the suction opening 10 to the rear, and then rises gently curved upward.

  On the joint 4 side of the suction chamber 21, there is a rear wall opening 12 formed on the inner side of the mounting portion 3, and the air sucked from the suction opening 10 passes through the suction chamber 21 to the joint 4 from the rear wall opening 12. Can lead.

  According to the present embodiment, the suction chamber 21 has the rear wall portion 24c that rises in a bow shape from the suction opening portion 10 toward the rear wall opening portion 12, so that the suction opening portion is compared with a case where the suction chamber 21 rises sharply. A suction airflow that smoothly flows backward from 10 can be generated. As a result, the dust rolled up near the end (rear edge 10 c) of the suction opening 10 can be smoothly drawn to the rear wall opening 12. Therefore, it is possible to realize the suction head 1 having excellent dust removal performance while having low power consumption.

  The rear wall opening 12 is formed in a substantially circular shape by connecting the upper opening 12 a of the upper cover 1 a formed in the mounting portion 3 and the lower opening 12 b of the lower cover 1 b formed in the mounting portion 3. The

The opening surface of the rear wall opening 12 (the surface passing through the upper opening 12a and the lower opening 12b) is preferably a surface whose normal vector has a horizontal component. In the example shown in FIG. 5, the opening surface of the rear wall opening 12 is a substantially vertical surface. That is, in the example shown in FIG. 5, the normal vector of the opening surface of the rear wall opening 12 is substantially horizontal.

  According to the present embodiment, since the opening surface of the rear wall opening 12 is a surface whose normal vector has a horizontal component, the dust that has moved along the rear wall 24c is effectively applied to the rear wall opening 12. Can inhale. Therefore, it is possible to realize the suction head 1 having excellent dust removal performance while having low power consumption.

  The wall portion 24 has side wall portions 24 b and 24 b on both ends in the width direction of the suction head 1. The side walls 24b and 24b are configured such that the end (side edge 10b) on the suction opening 10 side has a plate shape. Since the end portions of the side wall portions 24b and 24b are formed in a plate shape, the end portions of the side wall portions 24b and 24b are likely to enter between piles such as carpets. Thereby, the clearance gap between a to-be-cleaned surface and a bottom part can be made small. Therefore, a suction head having a high dust pickup rate / suction work rate (% / W) can be realized even when the floor surface is a carpet or the like.

  The side wall portions 24 b and 24 b can have lower end portions whose lower ends are curved inward of the suction head 1 toward the suction opening 10.

  The side wall portion 24b has a suction groove 22 cut out at a predetermined width and height. The suction groove 22 appears well in FIG. 5 and FIG. 6, and the gap between the suction groove 22 and the floor surface G is larger than the gap H. Therefore, an air flow is generated from both ends in the width direction of the suction head 1 toward the center. To do.

  The rear wall portion 24c rises from the suction opening portion 10 toward the rear wall opening portion 12 while being curved like a bow. Further, in the example shown in FIG. 5, the rear wall portion 24 c extends horizontally from the rear edge 10 c of the suction opening 10 to the rear, and then rises gently curved upward. Moreover, the rear wall part 24c is comprised by plate shape.

  As shown in FIG. 6, the suction chamber 21 is formed over the entire width of the suction head 1, a suction opening 10 is opened below the suction chamber 21, and a rear wall opening 12 is located at the center rear of the suction chamber 21. Opens. The upper wall portion 2 has an inner surface forming the suction chamber 21 substantially flat except for the protruding portion 2 a and is parallel to the floor surface G. The bottom 20 of the lower cover 1b is particularly flat on the side facing the floor G except for the suction groove 22, and is parallel to the floor G with a slight gap H therebetween.

  FIG. 7 is a perspective view schematically showing a virtual three-dimensional shape.

  As illustrated in FIG. 7, the description will be made on the assumption that a virtual three-dimensional shape 30 exists in the gap H between the floor surface G and the bottom portion 20. The virtual three-dimensional shape 30 has a suction opening 10 as an upper surface 32, a side wall 36 extending vertically from the floor surface G, which is a surface to be cleaned, to the suction opening 10, and a bottom surface 34 formed on the floor surface G facing the upper surface 32. And is virtually formed. In FIG. 7, the gap H is made higher than the gap H in FIGS. 4 to 6 in order to facilitate the explanation of the side wall 36, but the gap H is a slight distance as in FIGS. 4 to 6. It remains the same.

  The upper surface 32 of the virtual three-dimensional shape 30 is an opening of the suction opening 10, and is a flat surface surrounded by the front edge 10a, the side edges 10b, 10b, and the rear edge 10c of the suction opening 10. Suction grooves 22 and 22 are formed on the side edges 10b and 10b so as to protrude upward.

The bottom surface 34 of the virtual three-dimensional shape 30 is a shape obtained by projecting the top surface 32 onto the floor surface G. The upper surface 32 is formed at the upper end of the side wall 36 extending vertically upward from the periphery of the bottom surface 34. The side wall 36 has the same height as the gap H. The side wall 36 of the virtual three-dimensional shape 30 has a front side wall 36a extending from the front edge 10a toward the floor surface G, and the side edges 10b, 10b to the floor surface G. The lateral side walls 36b and 36b extend toward the floor G, and the rear side wall 36c extends from the rear edge 10c toward the floor surface G. The lateral side walls 36b, 36b include the area of a portion formed so as to protrude upward by the suction grooves 22, 22.

  It can be said that the area of the side wall 36 is a substantial opening area formed in the gap H between the floor surface G and the suction head 1. That is, the area of the side wall 36 is a substantial opening area of the suction head 1 when the suction head 1 is placed on the floor G for cleaning. Therefore, the suction head 1 having an excellent dust pickup rate can be obtained by setting the area of the side wall 36 within a predetermined range.

Area of the side wall 36 of the virtual three-dimensional shape is 140mm ² ~800mm ^2. Substantial by the area of the side wall 36 of the virtual three-dimensional shape 30 is an opening area is 140mm ² ~800mm ^2, higher if the floor G is carpets dust pickup rate / suction work rate of the suction head ( % / W) can be realized.

When the area of the side wall 36 is 140mm ² ~800mm ^2, the gap H between the floor G and the bottom 20 can be 0.3 mm to 1.5 mm.

Further, for example, when the gap H between the floor G and the bottom 20 is 0.5 mm to 1.5 mm, can be an area of the side wall 36 of the virtual three-dimensional shape 30 is 240mm ² ~750mm ^2. According to such a suction head 1, an excellent dust pickup rate can be achieved when the floor surface G is a carpet or the like, and the slidability of the suction head 1 is also excellent when cleaning the carpet or the like. Further, in such a suction head 1, the ratio of the opening area of the rear end portion of the joint 4 to the area of the side wall 36 of the virtual three-dimensional shape 30 can be 0.7 to 2.3. When the suction head 1 is regarded as a tubular body, the wind speed at the suction opening 10 increases as the opening area of the rear end of the joint 4 serving as the outlet increases with respect to the area of the side wall 36 serving as the inlet. As a result, the dust pickup rate is also improved.

  FIG. 8 is a partially enlarged cross-sectional view of the side wall 24b of the suction head 1 according to one embodiment of the present invention as seen from the front. FIG. 9 is a partially enlarged view of a side wall 240b of a conventional suction head.

  As shown in FIG. 8, the plate-like end portions (side edges 10b) of the side wall portions 24b and 24b are moved out of the suction head 1 back and forth, and are piled up from the carpet (from the ground). It is easy to enter between the fibers (parts of fibers) P, and it is possible to enter the vicinity of the base surface Gc such as carpet, which is the root of the pile P. Therefore, the slight gap H formed between the suction head 1 and the floor surface G does not become extremely large even if the floor surface G becomes a carpet or the like.

  As shown in FIG. 9, for example, when the side wall 240b is not formed into a plate-like body as in the conventional suction head, the suction head enters between the piles P while remaining on the pile P such as carpet. Hateful. Therefore, the gap H set between the suction head and the floor surface G becomes extremely large on the carpet or the like, and a predetermined suction force cannot be obtained, compared with a hard floor (for example, a flat flooring). As a result, the dust pick-up rate on carpets and the like is extremely reduced.

  The suction head 1 has a small gap H from the ground surface Gc of the carpet or the like to the bottom 20 of the suction head 1 even on the carpet or the like due to the plate-like ends (side edges 10b) of the side walls 24b and 24b. Since it can be maintained, a high suction force can be obtained, and thus an excellent dust pickup rate can be achieved.

  The side wall portions 24b and 24b may have a plate thickness Ta of 1.5 mm to 3 mm in a plate-shaped portion. Further, the side wall portions 24b, 24b may have a plate thickness Ta of 2 mm to 3 mm in a portion formed in a plate shape. When the thickness Ta of the side wall portions 24b and 24b is 3 mm or less, the side wall portions 24b and 24b easily enter between the piles P such as carpets, and enter the vicinity of the ground surface Gc such as carpets that are the roots of the piles P. Can do. In addition, there is a risk of deformation due to insufficient strength when the plate thickness Ta of the side wall portions 24b, 24b is 1 mm or less, but deformation due to insufficient strength due to being 1.5 mm or more. It is possible to prevent this, and higher strength can be ensured by being 2 mm or more.

  The side walls 24b, 24b may have the same thickness from an end (side edge 10b) which is the lower end facing the floor surface G to at least 10 mm or more, for example, from the lower end to the upper end connected to the upper wall 2. . Since most carpets have a pile length of 10 mm or less, the side wall portions 24 b and 24 b can be plate-like bodies having the same plate thickness Ta from the lower end to a height of at least 10 mm. In addition, since the suction head 1 is usually configured by connecting the upper cover 1a and the lower cover 1b, a large step or a large step on the inner surface of the side wall portions 24b, 24b is provided so as not to hinder the flow of dust sucked up by the suction air. It is preferably formed smoothly and continuously without protrusions.

  The side wall portions 24 b and 24 b can have lower end portions whose lower ends are curved inward of the suction head 1 toward the suction opening 10. In FIG. 8, the lower end portions of the side wall portions 24 b and 24 b are the side portions 20 b of the bottom portion 20, and the curved end surfaces facing inward are the side edges 10 b of the suction opening portion 10. Normally, the side walls 24b, 24b are farthest from the joint 4 provided near the center of the suction head 1, so that the ability to remove dust on a carpet or the like is also reduced. Thus, by providing the curved lower end portion on the side wall portions 24b, 24b, the dust wound up near the side wall portions 24b, 24b can be conveyed upward by the suction air along the curved surface. Further, the curved lower end portions of the side walls 24b and 24b come into contact with the pile P such as carpet from the lateral direction, and the pile P is compared with the case where the lower end portion is not curved and contacts the pile P from directly above. It is hard to hurt.

  The lower end portion can have a width of more than 3 mm and less than 5 mm inward from the width direction end of the suction head 1 of the side wall portions 24 b, 24 b toward the suction opening 10. When the width toward the inside of the lower end exceeds 3 mm, a lower end that is slightly curved inward from the side walls 24b and 24b can be formed. Further, by setting the width toward the inside of the lower end portion to be 5 mm or less, the side wall portions 24b and 24b can easily enter between the piles P such as carpets, and enter the vicinity of the ground surface Gc such as carpets that are the roots of the piles P. Can do.

  Thus, according to the present embodiment, the plate-like lower ends of the side wall parts 24b, 24b of the suction opening 10 are easy to enter between piles such as carpets, so that the gap between the floor surface G and the bottom part 20 is reduced. it can. Therefore, the suction head 1 having an excellent dust pickup rate can be realized.

  FIG. 10 is a partially enlarged cross-sectional view of the rear wall 24c of the suction head 1 according to an embodiment of the present invention as seen from the side. FIG. 11 is a partially enlarged view of a rear wall portion 240c of a conventional suction head.

  As shown in FIG. 10, the rear wall portion 24c of the plate-like body enters between piles (fibers of the portion protruding from the ground) P such as carpet when the suction head 1 is moved back and forth for cleaning. It is easy to penetrate to the vicinity of the ground surface Gc such as carpet, which is the base of the pile P. Therefore, the slight gap H formed between the suction head 1 and the floor surface G does not become extremely large even if the floor surface G becomes a carpet or the like.

  As shown in FIG. 11, for example, when the rear wall 240c is not formed into a plate-like body as in a conventional suction head, the suction head remains on the pile P such as a carpet between the piles P. Hard to get in. Therefore, the gap H set between the suction head and the floor surface G becomes extremely large on the carpet or the like, and a predetermined suction force cannot be obtained, compared with a hard floor (for example, a flat flooring). As a result, the dust pick-up rate on carpets and the like is extremely reduced.

  Since the suction head 1 can maintain the gap H from the ground surface Gc of the carpet or the like to the bottom 20 of the suction head 1 even on the carpet or the like by the rear wall portion 24c of the plate-like body, Force can be obtained, and therefore an excellent dust pick-up rate can be achieved.

  Thus, according to this embodiment, since the edge part 10c by the side of the rear wall opening part 12 side of the suction opening part 10 has the rear wall part 24c comprised by plate shape, the rear wall opening of the suction opening part 10 is carried out. The end (rear end 20c) on the part 12 side easily enters between piles such as carpets. Thereby, the clearance gap between the to-be-cleaned surface and the bottom part 20 can be made small. Therefore, the suction head 1 having excellent dust removal performance can be realized even with low power consumption.

  In the example shown in FIG. 5, the rear wall 24c has an end (rear end 20c) on the rear wall opening 12 side of the suction opening 10 that is substantially parallel to the surface to be cleaned (floor surface G).

  According to the present embodiment, the end (rear end 20c) on the rear wall opening 12 side of the suction opening 10 is substantially parallel to the surface to be cleaned (floor surface G). A suction airflow that flows backward smoothly can be generated. As a result, the dust wound up near the end (rear end 20c) on the rear wall opening 12 side of the suction opening 10 can be smoothly drawn up to the rear wall opening 12. Therefore, the suction head 1 having excellent dust removal performance can be realized even with low power consumption.

  In the rear wall 24c, the thickness Tb of the end (rear end 20c) on the rear wall opening side of the suction opening 10 can be 1.5 mm or more and 3 mm or less. Further, in the rear wall 24c, the thickness Tb of the end (rear end 20c) on the rear wall opening side of the suction opening 10 can be 2 mm or more and 3 mm or less. When the thickness Tb of the end (rear end 20c) on the rear wall opening side of the suction opening 10 of the rear wall 24c is 3 mm or less, the rear wall 24c enters between piles P such as carpets. It is easy to penetrate to the vicinity of the ground surface Gc such as carpet, which is the base of the pile P. Further, when the thickness Tb of the rear wall opening side end portion (rear end portion 20c) of the rear wall portion 24c is 1 mm or less, there is a risk of deformation due to insufficient strength. When it is 5 mm or more, deformation due to insufficient strength can be prevented, and when it is 2 mm or more, higher strength can be ensured.

  In the example shown in FIG. 5, the rear wall portion 24 c rises from the suction opening portion 10 toward the rear wall opening portion 12 while being curved like a bow. Further, in the example shown in FIG. 5, the rear wall portion 24 c extends horizontally from the rear edge 10 c of the suction opening 10 to the rear, and then rises gently curved upward.

  According to the present embodiment, the rear wall portion 24c rises from the suction opening 10 toward the rear wall opening 12 in a bowed shape, so that the rear wall portion 24c is smoothly rearward from the suction opening 10 compared to a case where the rear wall portion 24c rises sharply. A suction airflow that flows to As a result, the dust rolled up near the end (rear edge 10 c) of the suction opening 10 can be smoothly drawn to the rear wall opening 12. Therefore, it is possible to realize the suction head 1 having excellent dust removal performance while having low power consumption.

  The opening surface of the rear wall opening 12 (the surface passing through the upper opening 12a and the lower opening 12b) is preferably a surface whose normal vector has a horizontal component. In the example shown in FIG. 5, the opening surface of the rear wall opening 12 is a substantially vertical surface. That is, in the example shown in FIG. 5, the normal vector of the opening surface of the rear wall opening 12 is substantially horizontal.

  According to the present embodiment, since the opening surface of the rear wall opening 12 is a surface whose normal vector has a horizontal component, the dust that has moved along the rear wall 24c is effectively applied to the rear wall opening 12. Can inhale. Therefore, it is possible to realize the suction head 1 having excellent dust removal performance while having low power consumption.

  Desirably, there is no bottom 20 protruding toward the floor G other than the front wheels 6a and the rear wheels 6b. For example, a rubber sheet can be provided behind the suction opening 10 so as to protrude from the bottom to improve the dust pickup rate for particularly hard floors. Such a rubber sheet can be used on a carpet or the like. In order to inhibit the slidability, a separate suction head for carpet or the like must be prepared, and it is not preferable to employ the suction head 1 of the present embodiment. In addition, for example, there is a technique for adsorbing dust by providing a synthetic resin brush (so-called lint brush) brushed short around the suction opening 10 so as to protrude downward, but sliding on a carpet or the like. Therefore, it is not preferable to employ the suction head 1 according to the present embodiment. In addition, for example, a technique is generally used to increase the dust pickup rate by scraping dust by providing a rotating brush in the suction opening 10, but there are problems such as increased power consumption and noise. It is not preferable to employ the suction head 1 of the form.

  According to the suction head 1 according to the present embodiment, an excellent dust pickup rate can be achieved when the floor G is a carpet or the like. Moreover, according to the vacuum cleaner 70 concerning this Embodiment, when the floor G is a carpet etc., the outstanding dust pick-up rate can be achieved.

  The suction head 1 according to the present embodiment is particularly advantageous for a battery-driven vacuum cleaner among the canister type vacuum cleaners 70 shown in FIG. Since a battery-driven vacuum cleaner is required to be cleaned as long as possible with the electric power stored in the battery, it is necessary to achieve high dust removal even with low power consumption. By using the suction head 1 according to the present embodiment, a high dust pickup rate can be achieved even with a low suction work rate, that is, low power consumption, which is advantageous in a battery-driven vacuum cleaner.

  As described above, in the present embodiment, the vacuum cleaner 70 has been described as a so-called canister-type vacuum cleaner 70 in which wheels are provided in the vacuum cleaner body 71. However, a user as shown in FIG. A so-called stick-type vacuum cleaner 70a that holds the vacuum cleaner body 71a and operates it with one hand may be used.

  FIG. 12 is a perspective view of a vacuum cleaner according to another embodiment of the present invention.

  A stick type vacuum cleaner 70a shown in FIG. 12 is connected to a vacuum cleaner body 71a having an electric blower (not shown), a cylindrical suction pipe 75a connected to the vacuum cleaner body 71a, and a tip of the suction pipe 75a. A suction head 1. The suction pipe 75a is made of a synthetic resin having a hollow cylindrical shape and rigidity. A suction air flow can be generated in the suction head 1 and the suction pipe 75a by applying a negative pressure by sucking and discharging air inside the electric blower (not shown) disposed inside the vacuum cleaner body 71a. it can.

  An operation switch is provided on the handle 74a, and for example, operations such as turning on and off the power supply of the electric blower and switching the strength of the suction force are possible. A battery (not shown) can be provided inside the vacuum cleaner main body 71a. The user can hold the handle 74a and carry the electric vacuum cleaner 70a, and can move and operate the suction head 1 relative to the surface to be cleaned.

  The suction head 1 according to the present embodiment is particularly advantageous for a battery-driven vacuum cleaner among such stick-type vacuum cleaners 70a. In the stick-type vacuum cleaner 70a, the battery must be reduced in size as compared with the canister-type vacuum cleaner, so that a more efficient suction head 1 is required. Therefore, by using the suction head 1 according to the present embodiment for the stick-type vacuum cleaner 70a, it is advantageous because a high dust pickup rate can be achieved even with low power consumption.

  Although the embodiments of the present invention have been described in detail as described above, those skilled in the art can easily understand that many modifications can be made without departing from the novel matters and effects of the present invention. .

  The suction head described in the above embodiment is attached to a commercially available vacuum cleaner, and the gap H between the bottom and the floor is changed to 0.5 mm, 1.5 mm, and 2.5 mm. The dust pickup rate (%) was measured according to “Removal of dust from hard floor surface with grooves”. In the measurement method of “removing dust from hard floor surface with grooves”, suction is made by reciprocating the suction head 5 times with respect to the dust scraped on the hard floor surface with grooves, and the amount of dust removed is expressed as a percentage. Measured with. The measurement results are shown in FIG.

  FIG. 13 shows the dust pick-up rate in the gap H between the bottom of the suction head and the floor surface on the horizontal axis and the “removing dust from the hard floor surface with grooves” on the vertical axis. The graph shown with a round dot is the dust pickup rate when attached to a stick-type vacuum cleaner with power consumption of 120W, and the graph shown with a square dot is when attached to a stick-type vacuum cleaner with power consumption of 80W Dust pickup rate.

  According to FIG. 13, a dust pickup rate of 90% or more was shown in the suction head in which the gap H was set to 0.5 mm and 1.5 mm. Although not shown in FIG. 13, when the suction head is attached to a vacuum cleaner having a lower suction power, there is almost no change in the gap H of 0.5 mm, but when the gap H becomes 1.5 mm. There was a tendency for the dust pickup rate to decrease.

At this time, the area of the side walls of the virtual three-dimensional shape of the suction head, a 247.5Mm ² when the gap H is 0.5 mm, the gap H is 742.5Mm ² when 1.5 mm, the gap H is 2. When it was 5 mm, it was 1237.5 mm ² . The area of the suction groove formed on the side wall portion of the suction head was calculated by including the area of the side wall. The opening area of the rear end portion of the joint is about 531 mm ² , and the ratio of the opening area of the rear end portion of the joint to the area of the side wall of the virtual three-dimensional shape is 2.15 when the gap H is 0.5 mm. When the gap H was 1 mm, it was 1.07, and when the gap H was 1.5 mm, it was 0.72.

The suction head described in the above embodiment was attached to a plurality of commercially available electric vacuum cleaners, and the dust pickup rate (%) was measured in accordance with “Removal of dust from carpets” in JIS C 9802. In the measurement method of “removing dust from the carpet”, the dust collected on the floor of the carpet was sucked back and forth with the suction head 5 times, and the amount of the removed dust was measured in percent. The measurement results are shown in Table 1 and FIG. 14 as Examples 1 to 4.

At this time, the clearance H of the suction head was 1 mm, and the area of the side wall of the virtual three-dimensional shape was 495 mm ² . Therefore, the ratio of the opening area of the rear end portion of the joint to the area of the side wall of the virtual three-dimensional shape was 1.07.

  At this time, the side wall portion of the wall portion of the suction chamber was a plate-like body having a thickness of 2 mm over the entire height (26 mm) direction, and had a lower end portion that curved with a width of 5 mm inside the suction head. About the presence or absence of the side wall part comprised in plate shape, it showed in Table 2 as "a plate-like side wall part."

  In the suction head of each vacuum cleaner, the presence or absence of the rear wall portion in which the end portion on the rear wall opening side of the suction opening portion is configured in a plate shape is shown in Table 2 as “plate-shaped rear wall portion”. It was.

  The presence / absence of the rear wall portion that curves and rises in a bow shape from the suction opening portion toward the rear wall opening portion in the suction head of each vacuum cleaner is shown in Table 2 as “curved rear wall portion”.

  In addition, the dust pickup rate of a commercially available vacuum cleaner made by another company was measured. All other vacuum cleaners used for measurement had a rotating brush on the suction head. The measurement results are shown in Table 1 and FIG. 14 as Reference Examples 1 to 9.

The area of the side wall of the virtual three-dimensional shape of the suction head of the vacuum cleaner, if the 140 mm ² ～800Mm ² range "Yes", if outside the range as "no" in Table 2 of "the area of the side wall" Shown in the column. The area of the side walls of the virtual three-dimensional shape of the Examples 1 to 4 is 495 mm ^2, the area of the side walls of the virtual three-dimensional shape of Reference Examples 1-9 were 2400 mm ² or more.

  Further, the horizontal axis in FIG. 14 is the suction power (W) of a commercially available vacuum cleaner used in the experiment, and the vertical axis is dust pickup ratio / suction power (% / W). The suction power is an index indicating the capacity of the main body of the vacuum cleaner, and the dust pickup rate tends to increase as the suction power increases. By determining the dust pickup rate / suction work rate (% / W), the capability of the suction head can be determined. The dust pickup rate / suction work rate (% / W) is B / A (%) in Table 1. In FIG. 14, Examples 1 to 4 are indicated by E1 to E4, and Reference Examples 1 to 9 are indicated by R1 to R9.

  As shown in Table 1, the vacuum cleaners equipped with the suction heads of Examples 1 to 4 were superior to the vacuum cleaners of Reference Examples 1 to 9 in terms of the dust pickup rate per unit suction work rate.

  Furthermore, when the dust pick-up rate when the rotary brush was driven and stopped using the electric vacuum cleaner of Reference Example 9 was measured, the dust pick-up rate was reduced by about 10%.

  As mentioned above, although this embodiment or the modification was demonstrated, this invention is not limited to these this embodiment or a modification, It is possible to implement in a various aspect in the range which does not deviate from the summary.

  The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 1 Suction head, 1a upper cover, 1b lower cover, 2 upper wall part, 2a protrusion part, 3 attachment part, 4 joint, 6a front wheel, 6b rear wheel, 10 suction opening part, 10a front edge, 10b side edge, 10c rear edge, 12 rear wall opening, 12a upper opening, 12b lower opening, 20 bottom, 20a front end, 20b side part, 20c rear end, 21 suction chamber, 22
Suction groove, 23 brushed part, 24 wall part, 24a first front wall part, 24b side wall part, 24c rear wall part, 24d second front wall part, 25 lower side wall part, 26 upper side wall part, 30 virtual solid shape, 32 Top surface, 34 Bottom surface, 36 Side wall, 36a Front side wall, 36b Lateral side wall, 36c Rear side wall, 70 Vacuum cleaner, 70a Vacuum cleaner, 71 Vacuum cleaner body, 71a Vacuum cleaner body, 72 hose, 73 Extension pipe, 74 Handle, 74a Handle, 75 Suction tube, 75a Suction tube, 76 Connection, D width, Da width, G Floor surface, Gc Surface surface of carpet, H gap, Ha suction groove height, Ta side wall thickness , Tb Rear wall thickness P Pile

Claims (5)

A bottom facing the surface to be cleaned;
A suction opening that opens to the bottom;
A joint connected to the vacuum cleaner body side;
A suction chamber communicating the suction opening and the joint;
Have
The suction power is a value (W) measured by the method of measuring the suction power in JIS C 9108, and the dust pickup rate is obtained by removing dust from the carpet in the performance measuring method of a household vacuum cleaner in JIS C 9802. The ratio (dust pickup rate / suction work rate) of the dust pickup rate (%) to the suction work rate (W) is 2.0 or more and 5.0 or less when the measured percentage (%) at the time of 5 reciprocations The
A suction head, wherein a clearance between a surface to be cleaned and the bottom is 0.3 mm to 1.5 mm . A bottom facing the surface to be cleaned;
A suction opening that opens to the bottom;
A joint connected to the vacuum cleaner body side;
A suction chamber communicating the suction opening and the joint;
Have
The suction power is a value (W) measured by the method of measuring the suction power in JIS C 9108, and the dust pickup rate is obtained by removing dust from the carpet in the performance measuring method of a household vacuum cleaner in JIS C 9802. The ratio (dust pickup rate / suction work rate) of the dust pickup rate (%) to the suction work rate (W) is 2.0 or more and 5.0 or less when the measured percentage (%) at the time of 5 reciprocations ,
The area of the side wall having a virtual three-dimensional shape composed of a side wall extending vertically from the surface to be cleaned to the upper surface with the suction opening as an upper surface and a bottom surface formed on the surface to be cleaned facing the upper surface is 140 mm ² to 8 mm.
Suction head, characterized in that it is 00 mm ² . In claim 1 or 2 ,
The suction chamber has a wall portion that rises upward from the suction opening,
The wall portion has side wall portions on both ends in the width direction of the suction head,
The suction head according to claim 1, wherein the side wall portion has a plate-like end on the suction opening side. In any one of claims 1 to 3
The suction head according to claim 1, wherein the suction chamber has a rear wall portion in which an end portion on the rear wall opening portion side of the suction opening portion is configured in a plate shape. A vacuum cleaner body having an electric blower;
A cylindrical suction pipe connected to the vacuum cleaner body;
The suction head according to any one of claims 1 to 4 , connected to a tip of the suction pipe;
A vacuum cleaner characterized by comprising:

Images