JP2006305242A - Cleaning tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning tool for stabilizing sliding between a cleaning head and a floor surface and removing dirt and dust in the wide range of the cleaning sheet. <P>SOLUTION: A plurality of front recessed parts 30 and a plurality of rear recessed parts 40 are arranged on the bottom 23 of a pad 22 which is attached to a cleaning head 11. An interval is obtained in a horizontal direction between the center line Of of the front recessed parts 30 and the center line Or of the rear recessed parts 40. The front recessed parts 30 and the rear recessed parts 40 are alternately arranged. The front recessed parts 30 have a bottom inclination surface 31 which gradually becomes shallow backward. The rear recessed parts 40 have a bottom inclination surface 41 which gradually becomes shallow forward. Accordingly, the sliding between the pad 22 of the cleaning head and the floor surface, etc., is made to be stable and also the dirt and dust are effectively caught in the wide range of the cleaning sheet. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cleaning tool suitable for cleaning a floor surface of a house or office, and in particular, can be stably slid with respect to a surface to be cleaned such as a floor surface, and cleaning with good dirt capturing efficiency. Concerning ingredients.

  A cleaning tool to be used by mounting an exchangeable or disposable cleaning sheet has a cleaning head to which the cleaning sheet is mounted and a shaft-shaped grip handle to which the cleaning head is attached at the tip. Is common.

  In the following Patent Document 2 shown in FIG. 10, the bottom surface of the cleaning head is a flat surface, and the cleaning sheet attached to the cleaning head has a floor surface or the like depending on the entire bottom surface of the cleaning head. Pressed against the surface to be cleaned.

  As described above, when the bottom surface of the cleaning head is a flat surface, the cleaning sheet is pressed against the surface to be cleaned by the entire surface of the bottom surface, so when wiping the surface to be cleaned, in the vicinity of the front edge and the rear edge of the bottom surface Dust and dust are concentrated on the outer surface of the cleaning sheet, and dust and dust are less likely to adhere to the vicinity of the center of the bottom surface. Therefore, the entire surface of the cleaning sheet cannot be used efficiently.

  Therefore, Patent Documents 1 to 5 below disclose a cleaning tool having a cleaning head having an uneven bottom surface.

  The thing of patent document 1 has the inclined surface in the front and back of the bottom face of a cleaning head, and has the shape which the center part in the front-back direction protruded most toward the to-be-cleaned surface in the said bottom face. The one described in Patent Document 2 is such that the structure of the bottom portion of the cleaning head gradually increases in thickness from the front edge toward the central portion, and gradually increases in thickness from the rear edge toward the central portion. The center part in the front-rear direction has a shape that protrudes most toward the surface to be cleaned. The thing of patent document 3 has the recessed part formed in the front edge part and the rear edge part via the level | step difference in the bottom face of the cleaning head, and the center part of the cleaning head is formed flat.

The thing of patent document 4 is a circular arc shape when the bottom face of a cleaning head is seen from the side, and the center part of the front-back direction protrudes most toward the to-be-cleaned surface. In the cleaning tool described in Patent Document 5, the bottom surface has an arc shape when the cleaning head is viewed from the side, and the center portion in the front-rear direction faces the surface to be cleaned, similar to the cleaning tool described in Patent Document 4. In addition, a recess that is separated from the surface to be cleaned is formed at the center in the left-right direction when viewed from the front.
Japanese Patent No. 2930472 Japanese Patent No. 2981110 JP-A-2005-601 Japanese Patent Laid-Open No. 11-244210 JP 2004-33530 A

  In all of Patent Documents 1 to 4, the vertical center portion of the bottom surface of the cleaning head protrudes most toward the surface to be cleaned, and this central portion is lateral (the longitudinal direction of the cleaning head). ) With the same thickness. With these cleaning tools, when a cleaning sheet is attached to the bottom of the cleaning head and the surface to be cleaned such as the floor surface is wiped, dust and dust tend to move to the center of the bottom surface of the cleaning head. Since the portions have the same shape in the lateral direction, dust and dust are concentrated at the front and rear portions of the central portion, and as a result, it is difficult to use the entire surface of the cleaning sheet widely and effectively.

  In any of the above-described Patent Documents 1 to 5, the shape of the bottom surface of the cleaning head protrudes most toward the surface to be cleaned at the center, and the bottom surface is separated from the surface to be cleaned before and after that. . Therefore, when moving the cleaning head forward by pushing the grip handle by hand, the cleaning head tends to tilt forward and the cleaning head is pressed against the surface to be cleaned such as the floor surface in an unstable posture. Thus, the force for pressing the grip handle is not effectively transmitted to the cleaning head, and the resistance force acting on the grip handle when the cleaning head is slid along the surface to be cleaned increases.

  The present invention solves the above-described conventional problems, and enables a wide range of the surface of the cleaning sheet laid on the bottom of the cleaning head to be effectively used for capturing dust and dirt, and at the time of cleaning. An object of the present invention is to provide a cleaning tool in which a contact state between a cleaning head and a surface to be cleaned such as a floor surface is easily stabilized.

1st this invention has the cleaning head and the holding part connected with the upper part of the cleaning head, In the cleaning tool by which the sheet | seat for cleaning is laid in the bottom part of the cleaning head,
The bottom of the cleaning head has a front edge and a rear edge extending in the lateral direction, and both end edges extending in the vertical direction,
The bottom is formed with recesses extending in the vertical direction from at least one of the front edge and the rear edge, and the recesses are provided at a plurality of positions at intervals in the horizontal direction. It is characterized by.

  In the cleaning tool according to the first aspect of the present invention, a plurality of recesses are provided at intervals in the horizontal direction at least one of the front edge portion and the rear edge portion. When sliding in the vertical direction with respect to the surface to be cleaned, dust and dust can be transferred to the inside of the plurality of recesses and captured by the cleaning sheet. Dust and dust can be captured by the cleaning sheet at the rear edge. As a result, dust and dust can be captured in a wide range of the cleaning sheet in the lateral direction.

  In the present invention, the bottom is provided with a front recess extending halfway from the front edge toward the rear edge to the rear edge and a rear recess extending halfway from the rear edge toward the front toward the front edge. The front concave portion and the rear concave portion may be provided at a plurality of locations at intervals in the lateral direction.

  In this configuration, when the cleaning head is slid back and forth in the vertical direction, dust and dust are concentrated and captured on the cleaning sheet in both the front recess and the rear recess.

  In this case, it is preferable that the front concave portion and the rear concave portion are formed so that the center line extending in the vertical direction of the front concave portion does not coincide with the center line extending in the vertical direction of the rear concave portion.

The second aspect of the present invention is a cleaning tool having a cleaning head and a grip portion connected to the upper portion of the cleaning head, wherein a cleaning sheet is laid on the bottom of the cleaning head.
The bottom of the cleaning head has a front edge and a rear edge extending in the lateral direction, and both end edges extending in the vertical direction,
The bottom portion is provided with a front recess extending halfway from the front edge portion to the rear edge portion and a rear recess portion extending from the rear edge portion to the front edge portion to the front portion. The front concave portion and the rear concave portion are formed so that the center line extending in the vertical direction and the center line extending in the vertical direction of the rear concave portion do not coincide with each other.

  In the cleaning tool of the second aspect of the present invention, since the front concave portion and the rear concave portion are alternately arranged in the lateral direction, dust and dust are concentrated on the surface of the cleaning sheet at the front concave portion and the rear concave portion. As a result, the cleaning surface of the cleaning sheet can be effectively used in a wide range in the lateral direction.

  In the second aspect of the present invention, at least one of the front concave portion and the rear concave portion may be formed in plural at intervals in the lateral direction. However, one front recess and one rear recess may be provided, or a plurality of front recesses and rear recesses may be formed.

  In the first and second aspects of the present invention, the bottom of the cleaning head is configured such that at least a part of the region excluding the concave portion can abut against the same plane.

  Since the region excluding the concave portion can abut against the same plane, the posture of the cleaning head is easily stabilized when the cleaning head is slid along the surface to be cleaned such as the floor surface. In particular, the cleaning head is preferably such that the outer regions located on both sides in the lateral direction across the recess can abut against the same plane.

  Moreover, it is preferable that the said recessed part is formed so that it may become shallow gradually as it goes to the center part in the vertical direction of a bottom part. Moreover, it is preferable that the said recessed part is formed so that it may become shallow gradually toward the both sides of the horizontal direction of a bottom part.

  When the concave portion has a shape that gradually becomes shallower toward the center portion or in the lateral direction, dust and dirt on the surface to be cleaned facing the concave portion are easily guided to the peripheral portion of the concave portion, and the cleaning sheet A wide range can be effectively used for cleaning.

  In the present invention, dust and dust falling on a surface to be cleaned such as a floor surface can be effectively captured over a wide range of the surface of the cleaning sheet laid on the bottom of the cleaning head. In addition, the cleaning head can be slid stably on the surface to be cleaned.

  FIG. 1 shows a cleaning tool according to an embodiment of the present invention, and is a perspective view showing a state where a cleaning sheet is mounted on the cleaning head, and FIG. 2 is a perspective view showing the cleaning head from which the cleaning sheet is removed. 3 is a front view of the cleaning head, FIG. 4 is a bottom view of the cleaning head, FIG. 5 is a cross-sectional view of the cleaning head, a cross-sectional view taken along the line VV of FIG. 3, and FIG. It is sectional drawing of the same location as FIG. 5 which shows the state with which the sheet | seat was mounted | worn.

  A cleaning tool 10 shown in FIGS. 1 and 2 includes a cleaning head 11, a shaft 13 connected to the upper surface of the cleaning head 11 via a universal joint 12, and a grip portion fixed to the upper end of the shaft 13 (see FIG. 1). Not shown). In this embodiment, the shaft 13 and the grip portion constitute a grip portion.

  The cleaning head 11 includes a holder 21 having a rectangular planar shape and a pad 22 attached to the lower portion of the holder 21. In the cleaning head 11, the Y direction shown in FIG. 2 is the vertical direction, and the X direction is the horizontal direction. The vertical direction (Y direction) is the front-rear direction when the cleaning head 11 is slid relative to the surface to be cleaned such as the floor surface.

  The holder 21 is a hard one that is injection-molded with a synthetic resin material such as acrylonitrile-butadiene-styrene (ABS), polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET). The pad 22 is made of a flexible and elastic material such as natural rubber, synthetic rubber, foamed rubber material, ethylene-vinyl acetate copolymer (EVA), foamed urethane, foamed polyethylene or the like. The pad 22 is bonded and fixed to the holder 21.

  As shown in FIG. 1, the disposable cleaning sheet 50 is laid on the bottom 23 of the pad 22, and is further wound and fixed on the upper surface of the holder 21. As shown in FIG. 2, the upper surface of the holder 21 is provided with a plurality of hooking means 15 for hooking the cleaning sheet 50. Since the cleaning head 11 has a large width dimension in the lateral direction (X direction) and is, for example, 20 cm or more or 30 cm or more, the latching means 15 are provided at eight locations on the upper surface of the holder 21.

  The latching means 15 has a latching sheet 16 formed of a slightly hard synthetic resin such as polyethylene terephthalate fixed to a hole formed in a substantially semicircular shape on the upper surface of the holder 21, and a saw is attached to the latching sheet 16. A slit 16a having a blade shape or a wavy line shape is formed. The cleaning sheet 50 is detachably fixed to the cleaning head 11 by the end of the cleaning sheet 50 wound up on the upper surface of the holder 21 being pushed into the slit 16a.

  The bottom portion 23 of the pad 22 is a cleaning operation unit that presses the cleaning sheet 50 against a floor surface or the like to perform wiping. As shown in FIGS. 2 to 4, the bottom portion 23 includes a front edge portion 24 facing forward in the longitudinal direction (Y direction), a rear edge portion 25 facing rearward, and a right end edge portion 26 facing in the lateral direction (X direction). And a rectangular shape having a left edge 27.

  As shown in FIG. 4, a front recess 30 is formed from the front edge 24 toward the rear edge 25 at the bottom 23. The front recessed part 30 is provided in three places at intervals in the horizontal direction (X direction). A rear recess 40 is formed from the rear edge 25 toward the front edge 24. The rear recessed part 40 is provided in three places at intervals in the horizontal direction (X direction). The front concave portion 30 and the rear concave portion 40 when viewed in the bottom view of FIG. 4 are each rectangular or square. All the front recesses 30 have the same shape and the same dimensions, and all the rear recesses 40 have the same shape and the same dimensions. The front recess 30 and the rear recess 40 are symmetrical to each other.

  In FIG. 4, the width dimension of the front recessed part 30 and the width dimension of the rear recessed part 40 are both indicated by W1, and the vertical dimension of the front recessed part 30 and the rear recessed part 40 are both indicated by L1.

  The center line Of extending in the vertical direction of each front recess 30 and the center line Or extending in the vertical direction of the rear recess 40 are formed at an interval in the horizontal direction. As a result, the front recess 30 and the rear recess 40 are formed. Are alternately arranged in the horizontal direction.

  The center line Of of the front recess 30 is located at the midpoint between the center line Or and the center line Or of the adjacent rear recess 40, and the center line Or of the rear recess 40 is also the center line Of of the adjacent front recess 30. And Of. The lateral distance between the center line Of of the front recess 30 and the center line Or of the rear recess 40 is equal to the width dimension W1. Both the front concave portion 30 and the rear concave portion 40 are formed in the lateral region (A) having the width dimension W2 inward from the right edge portion 26 and in the lateral region (A) having the width dimension W2 inward from the left edge portion 27. It has not been.

  The vertical dimension L1 of the front concave part 30 and the vertical dimension L1 of the rear concave part 40 are smaller than 1/2 of the vertical dimension L0 of the bottom part 23, and the front concave part 30 and the rear concave part 40 are arranged at a distance L2 in the vertical direction. Yes. The vertical dimension L2 is smaller than the vertical dimension L1. In the embodiment of FIG. 4, the distance L2 may be zero.

  The bottom 23 has almost the entire region excluding the front recess 30 and the rear recess 40, that is, the side regions (A) and (A), both outer regions (B) of the front recess 30, and both outer regions (C of the rear recess 40). ) And a belt-like region (D) having a vertical dimension of L2 and extending in the horizontal direction can be in contact with the same plane. That is, these regions (A), (B), (C), and (D) are flat surfaces or uneven surfaces that can be in contact with the same plane. In the embodiment of FIG. 4, each of the regions (A), (B), (C), and (D) has a concavo-convex shape in which a large number of grooves that cross each other are formed. Therefore, the front edge 24 of the bottom 23 can be substantially flush with the same plane except for the front recess 30, and the rear edge 25 can be substantially flush with the same plane except for the rear recess 40. Moreover, the non-slip | skid function of the bottom part 23 and the cleaning sheet 50 can be exhibited by making each said area | region (A) (B) (C) (D) uneven | corrugated shape.

  Each front recessed part 30 has the bottom part inclined surface 31 and the side part inclined surfaces 32 and 32 located in the both sides. As shown in FIG. 5, the bottom inclined surface 31 is a flat surface or a curved surface that gradually approaches the surface to be cleaned 60 (see FIG. 6) as it goes from the front edge portion 24 to the rear edge portion 25. Therefore, the depth from the surface of the bottom 23 to the bottom inclined surface 31 is gradually shallower toward the rear most deeply at the front edge 24. As shown in FIG. 3, the side inclined surfaces 32 and 32 are flat surfaces or curved surfaces that gradually approach the surface to be cleaned 60 as it goes outward from the bottom inclined surface 31 in the lateral direction. As shown in FIG. 4, the boundary lines 33, 33 between the bottom inclined surface 31 and the both side inclined surfaces 32, 32 have a shape that gradually increases in a straight line as the distance in the lateral direction goes rearward. However, the boundary lines 33 and 33 may be curved, and the distance between them in the lateral direction gradually increases toward the rear.

  The shape of the rear concave portion 40 is symmetrical to the front concave portion 30, and the front concave portion 30 and the rear concave portion 40 are opposite in the front-rear direction, and the shape and dimensions thereof are the same. The rear recess 40 also has a bottom inclined surface 41 and side inclined surfaces 42 and 42 located on both sides thereof, and a lateral direction of boundary lines 43 and 43 between the bottom inclined surface 41 and the side inclined surfaces 42 and 42. The interval is a shape that gradually widens toward the front.

  It is preferable that the depth dimension d of the front recessed part 30 in the front edge part 24 and the depth dimension d of the rear recessed part 40 in the rear edge part 25 are the same as or slightly larger than the thickness dimension of the cleaning sheet 50. The dimension d is about 1 to 5 mm, for example. In the cleaning head 11 of the embodiment, the depth dimension d is 2 mm.

  In the cleaning head 11 of the illustrated embodiment, the depth d of the front recess 30 and the rear recess 40 are all the same. However, the depth dimension d of the front concave part 30 and the rear concave part 40 may be different from each other, the depth dimension d of the front concave part 30 may be different from each other, or the depth dimension of the rear concave part 40 may be different from each other.

  The cleaning sheet 50 is formed of a non-woven fabric or a laminate of a plurality of non-woven fabrics. Or, a non-woven fabric with low fiber density is placed on the cleaning side surface of the base sheet made of non-woven fabric, etc. It has been done. Or what made the fiber which forms a nonwoven fabric fluffed in the cleaning side surface of the sheet | seat 50 for cleaning formed with the nonwoven fabric is also used.

Next, the usage method of the said cleaning tool 10 is demonstrated.
As shown in FIGS. 1 and 6, a disposable cleaning sheet 50 is attached to the cleaning head 11. This cleaning sheet 50 is laid on the bottom 23 of the pad 22, is further wound up on the upper surface of the holder 21, and is pushed into the slits 16 a of the eight latching means 15 provided on the upper surface of the holder 21. Mounted.

  The cleaning head 11 on which the cleaning sheet 50 is mounted is slid on the surface to be cleaned 60 such as a floor surface, with the longitudinal direction (Y direction) mainly directed in the front-rear direction. At this time, a pressing force is applied to the cleaning head 11 through the shaft portion 13, and the cleaning sheet 50 is pressed against the surface to be cleaned 60 by the bottom portion 23 of the pad 22.

  Since the front concave portions 30 and the outer regions (B) are alternately arranged in the lateral direction in front of the bottom 23 of the pad 22, the cleaning sheet 50 is strongly pressed in the outer region (B) and the sheet density is reduced. The pressure is increased by the front recess 30 and the sheet density is lowered. Since the bottom inclined surface 31 is formed in the front recess 30, the pressure applied to the cleaning sheet 50 gradually increases in the lower part of the front recess 30 as it moves rearward. Moreover, since the side inclined surface 32 is formed, in the lower part of the front recessed part 30, the pressurizing force with respect to the cleaning sheet | seat 50 becomes high gradually as it goes to an outer side area | region (B). Therefore, at the lower part of the front concave part 30, dust and dust are guided rearward and laterally, and the dust and dust are uniformly dispersed in the wide area at the lower part of the front concave part 30 and easily adhere to the cleaning sheet 50. Further, a large amount of dust and dirt is concentrated on the rear part and both side parts of the front recess.

  In addition, the bottom inclined surface 31 facilitates the introduction of dust and dirt to the vicinity of the belt-like region (D) located behind the front recess 30 and the side inclined surfaces 32 and 32 are formed. It becomes easy to guide toward the outer region (B) located on both sides of the front recess 30. As described above, in the portion of the front concave portion 30, dust and dust are likely to concentrate on the portion directly below the concave portion and on the contour portion of the concave portion. On the other hand, in the outer region (B), dust and dirt tend to concentrate near the front edge portion 24. As a result, dust and dust can be captured over a wide range of the cleaning surface of the cleaning sheet 50. This also applies to the rear recess 40 and the outer regions (C) located on both sides thereof.

  Moreover, since the front recessed part 30 and the back recessed part 40 are alternately arrange | positioned in the horizontal direction, when the cleaning head 11 is moved ahead, it is given to the cleaning surface of the cleaning sheet 50 under the front recessed part 30. Even if the collected dust and dust move backward, the dust and dust can be captured in the outer region (C) located at the rear. Similarly, when the cleaning head 11 is moved rearward, even if dust or dirt applied to the cleaning surface of the cleaning sheet 50 moves forward under the rear recess 40, the dust or dust is moved forward. Is captured in the outer region (B) located at. Thus, the front recessed part 30 and the back recessed part 40 are arrange | positioned by turns, and the wide range of the cleaning surface of the sheet | seat 50 for cleaning can be used effectively for a cleaning operation | work.

  Further, the left and right side regions (A), the outer regions (B) and (C), and the belt-like region (D) can be in contact with the same plane, and portions other than the front recess 30 are covered in the front edge portion 24. The portion other than the rear concave portion 40 hits the surface to be cleaned 60 even at the rear edge portion 25 when it hits the cleaning surface 60. Therefore, the contact state between the cleaning head 11 and the surface to be cleaned 60 is stable, and problems such as the front of the cleaning head 11 being less likely to occur when sliding forward are less likely to occur. Since the cleaning head 11 is in a stable contact state with the surface to be cleaned 60, the width of the cleaning head 11 is increased to facilitate use as a large cleaning tool.

The present invention is not limited to the above embodiment.
For example, the bottom 23 of the cleaning head 11 may be provided with a plurality of front recesses 30, for example, two may be provided with only one rear recess 40, and conversely, a plurality of rear recesses 40 may be provided, Only one front recess 30 may be provided. Moreover, the front recessed part 30 and the back recessed part 40 may be provided 1 each, and the one front recessed part 30 and the one back recessed part 40 may be displaced and arrange | positioned at a horizontal direction.

  Or only the front recessed part 30 may be provided, the back recessed part 40 may not be provided, and conversely, only the back recessed part 40 may be provided, and the front recessed part 30 may not be provided.

  In the embodiment shown in FIG. 4, the width dimension of both the front recess 30 and the rear recess 40 is W1, and the distance between the center line Of of the front recess 30 and the center line Or of the rear recess 40 is also W1. Therefore, the bottom 23 has a structure in which the front concave portion 30 or the rear concave portion 40 always exists when the entire region excluding the side regions (A) and (A) is viewed in the lateral direction. Therefore, dust and dust can be effectively captured over a wide range.

  However, the width dimension of the front recess 30 or the rear recess 40 may be shorter than the distance between the center line Of and the center line Of. Or the width dimension of the front recessed part 30 or the back recessed part 40 may be longer than the distance of the said center line Of and the center line Of, and the front recessed part 30 and the back recessed part 40 may overlap in the front-back direction. In any case, in the embodiment of the present invention, the outer region (C) exists in at least part of the rear of the front recess 30, and the outer region (B) exists in at least part of the front of the rear recess 40. It is preferable.

The perspective view which shows the whole structure of the cleaning tool of embodiment of this invention, The perspective view which shows the cleaning head of the said cleaning tool, Front view of the cleaning head; Bottom view of the cleaning head; Sectional drawing of the VV line of FIG. 3 which shows a cleaning head, Sectional drawing of the same part as FIG. 5 which shows the state by which the cleaning sheet was attached to the cleaning head,

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cleaning tool 11 Cleaning head 21 Holder 22 Pad 23 Bottom part 24 Front edge part 25 Rear edge part 26, 27 End edge part 30 Front recessed part 31 Bottom inclined surface 32 Side inclined surface 40 Back recessed part 41 Bottom inclined surface 42 Side inclined surface 50 Cleaning sheet 60 Surface to be cleaned

Claims (9)

In the cleaning tool which has a cleaning head and a grip part connected to the upper part of the cleaning head, and a cleaning sheet is laid on the bottom of the cleaning head,
The bottom of the cleaning head has a front edge and a rear edge extending in the lateral direction, and both end edges extending in the vertical direction,
The bottom is formed with recesses extending in the vertical direction from at least one of the front edge and the rear edge, and the recesses are provided at a plurality of positions at intervals in the horizontal direction. A cleaning tool characterized by   The bottom portion is provided with a front recess extending halfway from the front edge portion to the rear edge portion and a rear recess portion extending from the rear edge portion to the front edge portion to the front portion. The cleaning tool according to claim 1, wherein both the rear recess and the rear recess are provided at a plurality of locations at intervals in the lateral direction.   The cleaning tool according to claim 2, wherein the front concave portion and the rear concave portion are formed so that the center line extending in the vertical direction of the front concave portion and the center line extending in the vertical direction of the rear concave portion do not coincide with each other. In the cleaning tool which has a cleaning head and a grip part connected to the upper part of the cleaning head, and a cleaning sheet is laid on the bottom of the cleaning head,
The bottom of the cleaning head has a front edge and a rear edge extending in the lateral direction, and both end edges extending in the vertical direction,
The bottom portion is provided with a front recess extending halfway from the front edge portion to the rear edge portion and a rear recess portion extending from the rear edge portion to the front edge portion to the front portion. A cleaning tool, wherein a front recess and a rear recess are formed so that a center line extending in the vertical direction of the rear and a center line extending in the vertical direction of the rear recess do not coincide with each other.   The cleaning tool according to claim 4, wherein a plurality of at least one of the front concave portion and the rear concave portion is formed at intervals in the lateral direction.   The cleaning tool according to any one of claims 1 to 5, wherein at least a part of an area excluding the concave portion of the bottom portion of the cleaning head can be brought into contact with the same plane.   The cleaning tool according to claim 6, wherein the cleaning head is configured such that outer regions located on both sides in the lateral direction across the recess can abut against the same plane.   The said recessed part is a cleaning tool in any one of Claim 1 thru | or 7 currently formed so that it may become gradually shallow as it goes to the center part in the vertical direction of a bottom part.   The cleaning tool according to claim 1, wherein the concave portion is formed so as to gradually become shallower toward both lateral sides of the bottom portion.