JP2017192410A - Suction tool of vacuum cleaner, and vacuum cleaner including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suction tool of a vacuum cleaner capable of improving suction performance at a wall side without lowering suction performance at a place other than the wall side; and to provide a vacuum cleaner including the same.SOLUTION: A suction tool of a vacuum cleaner includes a suction port body, a bumper positioned on an outer edge part of the suction port body, and a suction port having an opening on a cleaning surface. The bumper has a bulkhead for keeping air tightness inside the suction port body, a front wall positioned on the reverse side to the suction port body with respect to the bulkhead, and provided at a floor surface height not contributing to keeping of air tightness inside the suction port body, and at least one or more openings formed by the bulkhead and the front wall.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vacuum cleaner suction tool and a vacuum cleaner including the same.

  The vacuum cleaner suction tool is required to have the ability to reliably suck dust near the wall. However, when the suction tool abuts against the wall, the wall blocks the inflow of air and may leave dust on the wall. Up to now, there has been a suction tool that improves the dust suction performance near the wall by providing an opening on the upper surface of the bumper located on the front end face of the suction tool and securing an air inlet when the suction tool comes into contact with the wall. Proposed. (For example, see Patent Document 1)

JP 2014-33934 A

  However, the suction tool described in Patent Document 1 has a front wall for guiding the flow of air taken in from an opening provided on the upper surface of the bumper, and the front wall holds one end of the airtightness inside the suction tool. There was a possibility that air could flow to the suction tool not only during the cleaning at the wall but also during the cleaning of the part away from the wall from the opening provided on the inside (on the suction tool side). As a result, the flow of air that contributes to dust removal flows around the cleaning surface by the amount of air that flows from the upper surface through this opening, which may reduce the suction performance of the floor surface.

  The objective of this invention is providing the suction tool of the vacuum cleaner which improved the suction performance in the wall side, and a vacuum cleaner provided with the same, without reducing the suction performance in cleaning other than the wall side.

  A suction body, a bumper positioned at the outer edge of the suction body, and a suction port having an opening on the surface to be cleaned, the bumper having a partition for maintaining airtightness inside the suction body, and a suction port with respect to the partition The front wall is located on the opposite side of the main body and has a front wall provided at a floor height that does not contribute to airtightness maintenance inside the suction mouth main body, and has at least one opening formed by the partition wall and the front wall. And

  According to the present invention, only when the suction tool comes into contact with the wall, by taking in air from the upper surface of the bumper, the vacuum cleaning that improves the suction performance at the wall without reducing the suction performance during cleaning other than the wall. The suction tool of a machine and a vacuum cleaner provided with the same can be provided.

It is an appearance perspective view showing the whole vacuum cleaner concerning the present invention. It is a top view of the suction tool of Example 1. It is a bottom view of the suction tool of Example 1. It is a top view of the state which removed the upper part of the suction tool of Example 1. FIG. It is AA sectional drawing at the time of advance of the suction tool of FIG. It is AA sectional drawing when the suction tool of FIG. 2 contacts the front wall. It is a top view of the suction tool of Example 2. It is BB sectional drawing when the suction tool of FIG. 7 touches the wall.

  Embodiments according to the present invention will be described below with reference to the drawings.

(First embodiment)
The external view of the vacuum cleaner which concerns on FIG. 1 at 1st Embodiment of this invention is shown. The vacuum cleaner 1 includes a vacuum cleaner body 2, an operation tube 4 that is connected to the hose portion 3 and provided with a hand operation switch SW and the like, an extendable tube 5 that is extendable and retractable, and a suction tool 6. ing.

  The vacuum cleaner body 2 includes an electric blower 2a that generates a suction force, a dust collection portion 2b that stores dust collected by the suction force of the electric blower 2a, and the like. In this embodiment, a so-called cyclonic vacuum cleaner will be described as an example. However, the present invention may be applied to a so-called paper pack type vacuum cleaner.

  One end of the hose part 3 is connected to the connection port 2c of the cleaner body 2 so as to communicate with the dust collecting part 2b of the cleaner body 2. Further, the other end of the hose portion 3 is connected to one end of the operation tube 4.

  The operation tube 4 includes a handle 4a provided with a hand operation switch SW and the like, a power supply terminal (not shown) supplied with power from the cleaner body 2, and the like. An energization terminal (not shown) provided at one end of the extension pipe 5 is connected to the power supply terminal.

  By operating the hand operation switch SW of the operation tube 4, it is possible to operate and stop the electric blower 2 a, switch between strong and weak, and operate and stop the electric motor 40 (see FIG. 4) provided in the suction tool 6. ing.

  The extension pipe 5 includes an outer pipe 5a and an inner pipe 5b. One end of the inner pipe 5b is inserted into the other end of the outer pipe 5a, and is provided inside the outer pipe 5a and the inner pipe 5b (not shown). The air passages are connected so as to communicate with each other, and are configured to be extendable. FIG. 1 illustrates a state in which the extension pipe 5 is shortest.

  FIG. 2 is a top view of the suction tool 6.

  As shown in FIG. 2, the suction tool 6 includes a suction case 10 that has a substantially T shape in a top view, and a suction joint 13 that is connected to the suction case 10.

  The mouthpiece case 10 includes a mouthpiece body 11 that is elongated in the left-right direction (width direction) in a top view, and a connecting portion 12 that is connected to the mouthpiece joint 13 at the center in the left-right direction of the mouthpiece body 11. . The connecting portion 12 is formed with a flow path R1 (see FIG. 3) that allows the suction body 11 and the suction joint 13 to communicate with each other.

  The mouthpiece body 11 is provided with a bumper 18 from the front end surface to the left and right side surfaces. The bumper 18 is located on the side opposite to the suction body 11 with respect to the partition wall 18a for ensuring airtightness in the suction body 11 at the time of use, and the suction tool 6 when the vacuum cleaner 1 (see FIG. 1) is used. Is formed by a front wall 18b that acts as a cushioning material that prevents damage to the wall or furniture and absorbs shock to the suction tool 6, and a partition wall 18a and the front wall 18b. And at least one opening 18c. In order to play the role of a cushioning material, at least the front wall 18b of the bumper 18 is desirably formed of an elastic material such as rubber or elastomer.

  The suction joint 13 includes a first connecting portion 14 that is rotatably connected to the connecting portion 12, and a second connecting portion 15 that is rotatably connected to the first connecting portion 14. Yes.

  The first connecting portion 14 has a substantially semi-track shape in a top view of FIG. 2 and has a cylindrical shaft 14 a that is connected to the connecting portion 12. The shaft 14 a is supported by a bearing portion 12 g (see FIG. 4) in which the axial direction is the left-right direction of the mouthpiece body 11 and both ends of the shaft 14 a are formed in the connecting portion 12. Moreover, the 1st connection part 14 is comprised so that it can rotate from a substantially parallel state with respect to the to-be-cleaned surface (cleaning surface) M (refer FIG. 5) to a substantially perpendicular state (up-down direction). Yes. That is, by rotating the first connecting portion 14 with respect to the suction case 10 with the shaft 14a as a fulcrum, the extension tube 5 (see FIG. 1) is substantially parallel to the surface to be cleaned M (see FIG. 5). It can be rotated between vertical states.

  The second connecting portion 15 is configured to be rotatable with respect to the first connecting portion 14 in the left-right direction of the mouthpiece body 11 (clockwise and counterclockwise in FIG. 2). Thereby, for example, the extension pipe 5 can be tilted toward a state substantially parallel to the surface to be cleaned M from a state in which the extension tube 5 is substantially perpendicular to the surface to be cleaned M.

  In addition, the second connecting portion 15 is provided with a power supply terminal 15a through which power is supplied. In addition, in the vacuum cleaner 1 (refer FIG. 1) of a present Example, it has comprised so that the electric power supplied to the suction tool 6 may be supplied from the cleaner body 2 through the hose part 3, the operation tube 4, and the extension tube 5. FIG. Yes.

  For example, in the state in which the extension pipe 5 (see FIG. 1) is substantially perpendicular to the surface M to be cleaned, the suction joint 13 as described above tilts the extension pipe 5 in the left-right direction (left-right direction) and operates the operation pipe 4 By twisting the (grip 4a) in either the left or right direction, the suction body 11 can be rotated approximately 90 degrees in any of the left and right directions, and cleaning can be performed with the left and right direction of the suction body 11 in the moving direction. Therefore, the suction tool 6 can be moved along the side of the wall for cleaning, or the suction tool 6 can be inserted into a narrow gap for cleaning.

  FIG. 3 is a bottom view of the suction tool 6.

  As shown in FIG. 3, the suction tool 6 includes a first rotary cleaning body 20 and a second rotary cleaning body 30. The suction case 10 (suction body 11) is formed with a brush chamber Q having an opening on the lower surface (a surface facing the cleaning surface) and an airtight chamber P having an opening (suction port) on the lower surface. .

  The first rotary cleaning body 20 is disposed on the front side in the front-rear direction along the left-right direction of the suction body 11 and is rotatably supported in the brush chamber Q. Moreover, the 1st rotation cleaning body 20 is provided continuously from the one end side of the left-right direction (the axial direction of the 1st rotation cleaning body 20) of the suction inlet main body 11 to the other end side.

  The first rotary cleaning body 20 includes a plurality of types of brushes 20a and 20b such as brushes having different hardnesses, and the brushes 20a and 20b are arranged in a spiral shape. In the present embodiment, the case where two types of brushes 20a and 20b are disposed has been described as an example. However, the present invention is not limited to this, and three or more types may be arranged in a spiral shape. A configuration in which a blade member made of an elastic material such as rubber is spirally arranged between the brushes formed may be added and can be appropriately changed.

  The second rotary cleaning body 30 is smaller than the diameter of the first rotary cleaning body 20, is covered with a brush body, and is disposed rearward and parallel to the first rotary cleaning body 20. Further, the second rotary cleaning body 30 is provided continuously from one end side to the other end side in the left-right direction of the suction body 11 in parallel with the axial direction of the first rotary cleaning body 20.

  Moreover, the 2nd rotary cleaning body 30 has the axial part 30a (shaft) parallel to the rotating shaft 21 of the 1st rotary cleaning body 20, and the axial part 30a is rotatably supported by the suction case 10 (suction body 11). Has been. The second rotary cleaning body 30 is not driven by an electric motor, but is configured to rotate by a frictional force with the surface to be cleaned M (see FIG. 5) when the suction tool 6 is moved. It is. Thus, since the 2nd rotation cleaning body 30 is supported by the suction inlet main body 11 via the axial part 30a, the structure of the 2nd rotation cleaning body 30 can be simplified.

  The suction tool 6 includes a brush drive switch 16, a wheel 17, and bearing pressing members 31 and 32 on the lower surface of the connecting portion 12 of the suction case 10.

  The brush drive switch 16 is a switch that detects whether or not the lower surface of the suction tool 6 is in contact with the surface to be cleaned M (cleaning surface), and is configured together with the wheel 16a. The wheel 16a is provided so that a part of the wheel 16a always protrudes from the lower surface of the suction case 10 (connecting portion 12) by a biasing means such as a spring. When it is detected that the wheel 16a protrudes from the suction case 10 and is not in contact with the surface to be cleaned M, the motor 40 (see FIG. 4) is driven by the control of the circuit board 50 (control board) (see FIG. 4). Is stopped, and the rotation of the first rotary cleaning body 20 is stopped. When it is detected that the wheel 16a is pushed into contact with the surface to be cleaned M, the electric motor 40 is driven by the control of the circuit board 50, and the first rotary cleaning body 20 rotates.

  The wheel 17 receives the stress of the forward / backward movement or the rotation operation operated by the operation tube 4 and brings the bottom surface of the suction tool 6 into close contact with the surface to be cleaned (cleaning surface), thereby improving the operation performance of the suction tool 6. have.

  The bearing pressing member 31 supports the rotating shaft of the first rotary cleaning body 20 and one end of the shaft portion 30a of the second rotary cleaning body 30, and is fixed to the suction case 10 with screws.

  The bearing pressing member 32 supports the rotation shaft of the first rotary cleaning body 20 and the other end of the shaft portion 30a of the second rotary cleaning body 30, and is locked to the suction case 10 so as to be removable (see FIG. (Not shown).

  FIG. 4 is a top view of the suction tool with the upper portion of the suction case 10 removed.

  As shown in FIG. 4, the suction tool 6 includes an electric motor 40 that drives the first rotary cleaning body 20 above the first rotary cleaning body 20 (see FIG. 3) and the second rotary cleaning body 30 (see FIG. 3). And a circuit board 50 for controlling the electric motor 40.

  The electric motor 40 is attached to one end side of the suction body 11 in the left-right direction. Further, the output shaft of the electric motor 40 is arranged in parallel with the left-right direction of the suction mouth main body 11. The output shaft of the electric motor 40 extends toward one end side in the left-right direction, and is connected to the first rotary cleaning body 20 via a toothed belt 41 at one end portion (right end portion in the figure) in the suction body 11. Has been.

  The circuit board 50 is attached to the opposite side of the electric motor 40 in the left-right direction of the suction body 11. The circuit board 50 has a rectangular board with long sides arranged in the left-right direction, and is arranged in the mouthpiece body 11 with the mounting surface facing upward in the vertical direction. Note that the mounting surface is not necessarily limited to upward in the vertical direction, and may be inclined with respect to the horizontal direction, or may be directed in the front-rear direction (vertically).

  5 is a cross-sectional view taken along the line AA in FIG. In FIG. 5, 63 is a partition wall that separates the brush chamber Q and the airtight chamber P, and 64 is a cover member that separates the second rotary cleaning body 30 and the airtight chamber P. The cover member 64 covers a part of the suction port to increase the flow velocity of the suction air by narrowing the opening area, and at the same time increases the negative pressure of the airtight chamber P, thereby improving the dust collection performance of the suction tool. . Moreover, the opening width L of a suction inlet can be narrowed because the cover member 64 covers a part of suction inlet. Thereby, the opening area which affects the negative pressure concerning a floor surface can be narrowed, the sticking to the floor surface of a suction tool can be made small, and the operation resistance of a suction tool can be reduced.

  When the suction tool 6 moves forward, as shown in FIG. 5, a flow path R2 through which air flows into the suction tool 6 through the gap between the partition wall 18a provided on the bumper 18 and the surface to be cleaned M is formed. The dust D1 located in front of the tool 6 can be sucked.

  FIG. 6 is a cross-sectional view taken along line AA in FIG. 2 when the front end portion of the suction tool 6 comes into contact with the front wall W1. When the wall W1 and the front wall 18b come into contact with each other, the flow path R2 is closed and the flow of air flowing from the flow path R2 into the suction body 11 disappears (or decreases), and accordingly, the floor passes from above through the opening 18c. After air is blown in the surface direction, an air flow is generated in the flow path R3 flowing into the suction body 11 from the gap between the partition wall 18a and the surface to be cleaned M, and the dust on the wall can be sucked.

Here, the front wall 18b needs to be provided at a height away from the floor so as not to contribute to ensuring airtightness inside the mouthpiece body 11. When the front wall 18b is provided up to a low position (close to the floor) that contributes to ensuring airtightness inside the mouthpiece body 11, the front wall 18b plays a role of securing airtightness of the mouthpiece body 11, and therefore the opening 18c is formed in the airtight chamber. Therefore, air flow is generated in the flow path R3 even during normal floor surface cleaning other than during wall cleaning where the flow path R2 is blocked. The upper limit of the total amount V of air sucked by the vacuum cleaner is determined regardless of the number and size of the flow paths, and the amount of air V _R2 sucked from the flow paths R2, R3, and other flow paths R4, respectively. The sum of V _R3 and V _R4 is (V = V _R2 + V _R3 + V _R4 ). Therefore, if air flows through the flow path R3 during normal cleaning except at the wall, the amount of air flowing through the flow path R2 decreases (V _R2 = V−V _R3 −V _R4, V _R3 ≠ 0), and the surface to be cleaned Since the amount of air that flows in the vicinity of M and sucks dust on the floor surface (= V _R2 ) decreases, the suction performance on the floor surface decreases. On the other hand, when the front wall 18b is provided at a height away from the floor so as not to contribute to ensuring airtightness inside the mouthpiece body 11, the opening 18c is located outside the airtight chamber, so that normal floor surface cleaning is in progress. Then, air does not flow through the flow path R3 (V _R3 = 0), and the amount of air flowing through the flow path R2 (V _R2 ) can be kept high (V _R2 = V−V _R4, (V _R3 = 0)). ， Floor suction performance is not reduced. During the cleaning of the wall, the flow path R2 is blocked and the air does not flow. Instead, air flows through the flow path R3 (V _R3 = V−V _R4 , (V _R2 = 0)), thereby leaving the dust at the wall. It can be sucked without.

  Moreover, since the distance between the outlet (exhaust side) of the opening 18c and the floor surface is increased by providing the front wall 18b at a high position, the air sucked from above is scattered and blown until it reaches the floor surface. In this way, the air flow can reach the corner of the wall (Fig. 6).

  At this time, by making the lower part of the partition wall 18a curved toward the suction tool, the air passing through R3 flows smoothly into the suction tool, and a relatively large dust such as rice grains is guided into the suction tool. Work as a role. The curved shape is not limited as long as it plays the role of a guide that guides dust to the suction tool 6, and may be a curved shape such as a C-plane.

  Note that the strength of the bumper 18 can be maintained by having the front wall 18b.

(Second Embodiment)
FIG. 7 is a top view showing the suction tool of the electric vacuum cleaner according to the second embodiment of the present invention. The suction tool 6A of the vacuum cleaner 1 according to the second embodiment has a configuration in which the bumper 18A is used instead of the bumper 18. Note that in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  According to the second embodiment, at the end of the bumper 18A other than the front surface in the traveling direction, the side wall 18Ab provided at a height away from the floor so as not to contribute to ensuring airtightness inside the mouthpiece body 11, at least One opening 18Ac is provided.

  FIG. 8 is a cross-sectional view taken along the line BB in FIG. 7 in a state where the suction tool 6A of the present embodiment is in contact with the side wall 18Ab. When cleaning the suction tool 6A along the side wall W2, the flow path R5 flowing into the suction tool 6A from the side is closed, so that the flow path R6 flowing into the suction tool 6A from above through the opening 18Ac. And the suction performance for the dust D3 near the side wall can be improved.

  Note that substantially the same effect can be achieved by a configuration in which at least one convex portion is provided on the side of the bumper 18A.

  In order to serve as a buffer material, at least the side wall 18Ab of the bumper 18A is desirably formed of an elastic material such as rubber or elastomer.

  In addition, what combined the structure of 1st Embodiment and 2nd Embodiment may be sufficient.

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner 2 Vacuum cleaner main body 2a Electric blower 2b Dust collection part 6 Suction tool 10 Suction case 11 Suction body 18, 18A, 18B, 18C Bumper 18a, 18Aa, Bulkhead 18b Front wall 18c, 18Bc Opening part 20 First rotation cleaning Body 30 Second rotating cleaning body 40 Electric motor 50 Circuit board (control board)
63 Front partition 64 Cover member M Surface to be cleaned (floor surface)
Q Brush chamber P Airtight chamber W1 Front wall W2 Side wall

Claims (6)

A suction body, a bumper located at the outer edge of the suction body, and a suction port having an opening on the surface to be cleaned;
The bumper is provided with a partition wall for maintaining airtightness inside the mouthpiece body, and at a floor height that is located on the opposite side of the mouthpiece body with respect to the partition wall and does not contribute to airtightness maintenance inside the mouthpiece body. A vacuum cleaner suction tool comprising a front wall, at least one opening formed by the partition wall and the front wall.   The suction tool for a vacuum cleaner according to claim 1 or 2, wherein the bumper has at least one opening on an upper surface of an end portion other than the front surface in the traveling direction of the suction body.   The suction tool of the vacuum cleaner according to claim 1 or 2, wherein the bumper has at least one convex portion on a side surface of the suction body.   The vacuum cleaner suction tool according to any one of claims 1 to 3, wherein the bumper is made of an elastic material such as rubber or elastomer.   5. The rotary cleaning body according to claim 1, further comprising a rotary cleaning body that is provided behind the rotary brush and has an axis parallel to the rotary brush and continuously provided from one end to the other end of the opening. Vacuum cleaner suction tool.   The vacuum cleaner main body according to any one of claims 1 to 5, wherein the vacuum cleaner main body has an electric blower that generates a suction force, a dust collecting unit that collects dust, and the vacuum cleaner main body. A vacuum cleaner comprising:

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