JP7040961B2 - Cleaning tool - Google Patents

Description

The present invention relates to a cleaning tool.

As the cleaning tool, there are those described in Patent Documents 1 to 3.

The cleaning tools described in Patent Documents 1 and 2 have an operation unit in which the base end side of the handle is gripped by the user's hand, have a cleaning head at the tip of the handle, and are operated by the cleaning head placed on the surface to be cleaned. It is arranged in the direction of progress of cleaning rather than the part, and the cleaning head is pushed and moved in the direction of progress of cleaning on the surface to be cleaned by the operation force of the user applied to the operation part to enable cleaning.

In the cleaning tool described in Patent Document 1, the tip of the handle and the cleaning head are connected by a rotary joint portion (universal joint), and the handle intersects the cleaning head that slides along the surface to be cleaned. The corners can be changed as appropriate according to the cleaning posture of the user.

Further, in the cleaning tool described in Patent Document 2, the intermediate portion in the cleaning advancing direction on the pressing surface of the cleaning head to which the wiping member is attached is a convex portion, and each of the two surfaces intersecting with the convex portion is a front surface surface. And the back side. Then, an intermediate rod is provided between the cleaning head and the handle, a rotary joint connected to the cleaning head is formed at one end of the intermediate rod, and a universal joint connected to the tip of the handle is formed at the other end of the intermediate rod. It is formed to connect the handle and the cleaning head. As a result, at the time of cleaning, the universal joint provided at the tip of the handle comes into contact with the edge portion of the cleaning head opposite to the cleaning advancing direction, and the universal joint is moved back and forth to the cleaning head to cover the cleaning head. By sliding it back and forth on the cleaning surface for cleaning, it is possible to wipe off the dust that was pushed and moved on the surface to be cleaned without being able to be taken in by the peripheral edge of the wiping member.

The cleaning tool described in Patent Document 3 has two upper and lower parts on the base end side of the handle as operation parts to be gripped by both hands of the user, and has a cleaning member at the tip of the handle and is placed on the surface to be cleaned. The removed cleaning member is arranged in a direction delayed from cleaning with respect to the operation unit, and the cleaning member is dragged and moved on the surface to be cleaned by the operation of both hands of the user added to the operation unit to enable cleaning.

The cleaning tool described in Patent Document 3 has a cut in a part of a bamboo handle along the length direction. As a result, at the time of cleaning, the bending force applied to the intermediate portion on the tip end side of the handle bends the portion of the handle provided with the cut into a dogleg shape, so that the cleaning member can be brought into close contact with the surface to be cleaned.

Japanese Unexamined Patent Publication No. 2013-176703 Japanese Unexamined Patent Publication No. 2002-102133 Japanese Unexamined Patent Publication No. 2004-305402

In the type of cleaning tool described in Patent Documents 1 and 2 that pushes and moves the cleaning head in the direction of progress in cleaning, a user who applies a moment of force required for sliding and moving the cleaning head on the surface to be cleaned is applied to the operation unit. Since it works around the user's hand through the distance from the operating portion to the cleaning head according to the operating force of the above, the moment of this force becomes a physical load on the user. The longer the handle, the longer the distance from the operation part to the cleaning head, and the physical load on the user becomes significantly larger (if the convenience and posture of the user are not taken into consideration, the shorter the handle, the longer the handle is for the user. Physical load is reduced).

However, in the cleaning tool described in Patent Document 1, even if the operating force applied to the operating unit during cleaning increases, the rest is constant from the operating unit to the cleaning head, and the force acting around the user's hand is constant. The moment increases as the operating force increases, increasing the physical load on the user.

Further, in the cleaning tool described in Patent Document 2, at the time of cleaning, the universal joint provided at the tip of the handle abuts on the cleaning head and slides the cleaning head on the surface to be cleaned. The distance to the cleaning head is fixed. Therefore, even with the cleaning tool described in Patent Document 2, the moment of the force acting around the user's hand during cleaning increases with the increase of the user's operating force applied to the operating unit, and the physical load on the user increases.

The cleaning tool described in Patent Document 3 enables cleaning by dragging the cleaning head on the surface to be cleaned in the direction of progress of cleaning by the operation of both hands of the user added to the operation unit, and enables cleaning by the user added to the operation unit. There is nothing about the cleaning tool that makes it possible to clean by pushing the cleaning head on the surface to be cleaned by pushing it in the cleaning progress direction by the operation force of the above, and regarding the reduction of the physical load on the user in such a push-moving type cleaning tool. However, there is no such thing.

An object of the present invention is to reduce the physical load on the user in a cleaning tool that enables cleaning by pushing and moving the cleaning head on the surface to be cleaned in the direction of progress of cleaning by the operation force of the user applied to the operation unit. There is something in it.

The invention according to claim 1 has an operation unit in which the base end side of the handle is gripped by the user's hand, has a cleaning head at the tip of the handle, and the cleaning head placed on the surface to be cleaned cleans more than the operation unit. It is a cleaning tool that is arranged in the advancing direction and pushes and moves the cleaning head on the surface to be cleaned by the user's operating force applied in the advancing direction to enable cleaning by sandwiching the intermediate portion in the longitudinal direction of the handle. Each of the proximal end side and the distal end side is provided as a proximal end side handle portion and a distal end side handle portion, and the proximal end side handle portion and the distal end side handle portion are connected flexibly via a bending joint, and the bending joint is formed. The crossing angle formed by the base end side handle portion and the tip end side handle portion on the side facing the anti-cleaning advancing direction is set to an initial bending angle consisting of a constant value of less than 180 degrees during non-cleaning, and is added to the operation portion during cleaning. It is configured to gradually change smaller than the initial bending angle according to the increase in the operating force of the user , and further, the bending joint is a connection that flexibly connects the base end side handle portion and the tip end side handle portion. It is formed on at least one of the shaft portion, the proximal end side handle portion and the distal end side handle portion, and the bending locking provided on the other handle portion when the intersection angle of both of these handle portions is about to exceed the initial bending angle. It is configured to have a bending engaging portion that engages with the portions and prevents bending of both handle portions in a direction exceeding the initial bending angle .

According to the present invention, the physical load on the user is reduced in a cleaning tool that enables cleaning by pushing and moving the cleaning head on the surface to be cleaned in the direction of progress of cleaning by the operation force of the user applied to the operation unit. be able to.

FIG. 1 is a schematic view showing an embodiment of a cleaning tool according to the present invention. FIG. 2 is a schematic view showing changes in the usage state of the cleaning tool according to the present invention. FIG. 3 is a graph illustrating the effect of the present invention. FIG. 4 is a schematic diagram showing the handle of the first embodiment. FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a cross-sectional view showing the bending joint in FIG. 5 with the elastic means removed. FIG. 7 is a schematic view showing the base end side handle portion. FIG. 8 is a schematic view showing the tip side handle portion. FIG. 9 is a schematic diagram showing the handle of the second embodiment. FIG. 10 is a cross-sectional view taken along the line X-X of FIG. FIG. 11 is a schematic diagram showing the handle of the third embodiment. FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. FIG. 13 is a schematic diagram showing the handle of the fourth embodiment. FIG. 14 is a cross-sectional view taken along the line XIV-XIV of FIG. FIG. 15 is a cross-sectional view showing the handle of the fifth embodiment.

FIG. 1 schematically shows the cleaning tool 100 of the present embodiment. The cleaning tool 100 has an operation unit 11 that grips the base end side of the handle 10 by the user's hand, has a cleaning head 12 at the tip of the handle 10, and the cleaning head 12 placed on the surface to be cleaned is the operation unit 11. It is arranged in the direction of progress of cleaning, and the cleaning head 12 is pushed and moved on the surface to be cleaned by the user's operating force applied to the operation unit 11 in the direction of progress of cleaning to slide, and the surface to be cleaned can be cleaned. be.

In the present embodiment, in the cleaning tool 100, the tip portion of the handle 10 and the cleaning head 12 are connected by a universal joint 13, and the axial direction of the handle 10 in the operation portion 11 slides on the surface to be cleaned. The crossing angle α (rad) (FIG. 1) formed with respect to 12 can be appropriately changed according to the cleaning posture of the user.

In the cleaning tool 100, the cleaning head 12 is provided with a mop, a brush, or the like for removing various stains on the surface to be cleaned, or a wiping member such as a cleaning sheet that can be replaced by wiping off the stains on the surface to be cleaned. Can be provided.

In FIG. 1, M is the moment of force acting on the user's hand holding the operation unit 11 [Nm], F is the operation force [N] applied by the user in the axial direction of the handle 10 on the operation unit 11, and Fy is. F is a component force [N] in the direction along the surface to be cleaned, Fz is a component force [N] in the direction orthogonal to the surface to be cleaned, and fy is a sliding resistance force [N] acting on the cleaning head 12. ..

However, in the cleaning tool 100, the physical load on the user is reduced when the cleaning head 12 is pushed and moved in the cleaning advancing direction on the surface to be cleaned by the operating force of the user applied to the operation unit 11. In order to achieve this, the following configurations are provided.

That is, as shown in FIG. 1, the handle 10 is divided in the longitudinal direction, and the proximal end side and the distal end side sandwiching the intermediate portion in the longitudinal direction of the handle 10 are each of the proximal end side handle portion 20 having a length L1 and the length L2. The tip side handle portion 30 is used. Then, the base end side handle portion 20 and the tip end side handle portion 30 are flexibly connected via the bending joint 40. In the present embodiment, the proximal end side handle portion 20 and the distal end side handle portion 30 are made bendable in a plane including a direction along the cleaning advancing direction of the cleaning tool 100.

Further, as shown in FIG. 1, the bent joint 40 has a crossing angle βi (rad) on the side where the base end side handle portion 20 and the tip end side handle portion 30 face each other in the anti-cleaning advancing direction (opposite direction to the cleaning advancing direction). It is supposed to make up. Then, in the bending joint 40, the intersection angle βi of the proximal end side handle portion 20 and the distal end side handle portion 30 is set to an initial bending angle β0 (FIG. 2A) having a constant value of less than 180 degrees when not cleaned. , Gradually smaller than the initial bending angle β0 (β1, β2 ... ) (FIGS. 2 (B), (C)) are configured to change. As the operating force F of the user increases (F1, F2 ...), the sliding resistance force acting on the cleaning head 12 increases (fy1, fy2 ...) (FIGS. 2B and 2C).

In FIG. 3A, the crossing angle βi of the proximal end side handle portion 20 and the distal end side handle portion 30 is gradually smaller than the initial bending angle β0 as the operating force F of the user increases due to the presence of the bending joint 40. The characteristic A1 of the present invention is shown in comparison with the characteristic A2 according to the conventional example (for example, fixed at βi = 180 degrees) in which the handle 10 does not bend without the bending joint 40.

Therefore, at the time of cleaning by the cleaning tool 100, the handle 10 (base end side handle portion 20 and tip end side handle portion 30) is bent as described above, so that the handle 10 is cleaned with the operation portion 11 (power point of the operation force F). The distance from the head 12 (the point of action of the sliding resistance force fy on the surface to be cleaned) is shortened. Then, when the cleaning head 12 is slid and pushed on the surface to be cleaned due to the user's operating force F applied to the base end side handle portion 11 during cleaning by the cleaning tool 100, it acts on the user's hand. The moment M of the force to be applied is determined by the distance between the operation unit 11 and the cleaning head 12 and the operation force F of the user, the sliding resistance force acting on the cleaning head 12, and the axial direction of the handle 10 in the operation unit 11. The crossing angle α formed by the surface to be cleaned (α is constant if there is no change in the cleaning posture of the user), the length L1 of the base end side handle portion 20, the length L2 of the tip end side handle portion 30, and the base end. Based on the crossing angle βi (changes to β1, β2 ...) formed by the side handle portion 20 and the tip side handle portion 30, the following equation (1) is obtained.
M = [fy x sin (α)] x [L1 + L2 x cos (180-βi)] +
[fy × cos (α)] × [L2 + sin (180-βi)]

FIG. 3B shows the characteristic B1 of the present invention in which the bending moment M of the force acting on the user's hand as the operating force F of the user increases becomes smaller due to the presence of the bending joint 40. It is shown in comparison with the characteristic B2 according to the conventional example (for example, fixed at βi = 180 degrees) in which the handle 10 does not bend without having 40.

Therefore, according to the cleaning tool 100 of the present embodiment, the following functions and effects are obtained.
(a) The bent joint 40 that connects the base end side handle portion 20 provided with the operation portion 11 and the tip end side handle portion 30 provided with the cleaning head 12 has a base end side handle portion 20 and a tip side handle portion thereof. The crossing angle βi of 30 can be configured to change smaller than the initial bending angle β0 as the operating force F of the user applied to the operating unit 11 increases. Therefore, the operating force F applied to the operation unit 11 by the user in an attempt to push the cleaning head 12 on the surface to be cleaned in the cleaning advancing direction during cleaning is F1, F2 ... As the number increases, the base end side handle portion 20 and the tip end side handle portion 30 constituting the handle 10 are bent as shown in β1 and β2 shown in FIGS. 2B and 2C. As a result, the distance between the operation unit 11 and the cleaning head 12 on the handle 10 becomes short, and as a result, the moment M of the force required for the user to slide the cleaning head 12 on the surface to be cleaned becomes small. It is possible to reduce the physical load on the user.

(b) In the bent joint 40 of the above-mentioned (a), the initial bending angle β0 when not in use is set to a constant value of less than 180 degrees. As a result, the base end side handle portion 20 and the tip end side handle portion 30 constituting the handle 10 are maintained in a bent state even during non-cleaning, and when the user applies an operating force to the operation portion 11 as the cleaning starts. Immediately, the crossing angle βi of the bending joint 40 can be configured to change smaller than the initial bending angle β0.

Hereinafter, a specific embodiment of the bent joint 40 connecting the base end side handle portion 20 and the tip end side handle portion 30 will be described.

(Example 1) (FIGS. 4 to 8)
In order to form the bent joint 40, the base end side handle portion 20 is made of, for example, a tubular body as shown in FIGS. 4 to 7, and the end face 21 (described later) located on the connection end side with the tip end side handle portion 30. A bifurcated base end side connecting piece 41 is erected in the axial direction on the bent locking portion (21K). Further, as shown in FIGS. 4 to 6 and 8, the tip side handle portion 30 is made of, for example, a tubular body, and the end surface 31 (bending locking described later) located on the connection end side with the base end side handle portion 20. A pair of tip-side connecting pieces 42 forming a fork are erected in the axial direction on the portion (which becomes the portion 31K). Then, in the bent joint 40, both connecting pieces 42 provided in the distal end side handle portion 30 are inserted so as to fit within the space between the both connecting pieces 41 provided in the proximal end side handle portion 20. The connecting shaft portion 43 is inserted into the connecting holes 41A and 42A provided in the connecting pieces 41 and 42. As a result, the base end side handle portion 20 and the tip end side handle portion 30 can be flexibly connected in the plane including the direction along the cleaning progress direction with the connection shaft portion 43 inserted through the connection pieces 41 and 42 as the swing center. Will be done.

Further, in the bent joint 40, as shown in FIGS. 4 and 8, the rising top surface of both connecting pieces 41 erected on the end surface 21 of the base end side handle portion 20 is bent and engaged on the base end side. The portion 44 is formed. As shown in FIGS. 4, 6, and 7, the distal end side bending engaging portion 45 is formed on the rising top surface of both connecting pieces 42 erected on the end surface 31 of the distal end side handle portion 30. The base end side bending engaging portion 44 provided on the base end side handle portion 20 has a rounded flank surface 44S around the peripheral surface centered on the connecting hole 41A, and the peripheral surface toward the anti-cleaning advancing direction is a rounded flank surface. The peripheral surface connected to the cleaning progress direction toward the cleaning progress direction is defined as an engaging surface 44K in which the turning radius around the connecting hole 41A gradually becomes a large radius toward the cleaning progress direction. Further, the tip-side bending engaging portion 45 provided on the tip-side handle portion 30 has a rounded flank surface 45S around the peripheral surface centered on the connecting hole 42A and a peripheral surface toward the direction of anti-cleaning. The peripheral surface connected to the 45S near the cleaning advancing direction is defined as an engaging surface 45K in which the turning radius around the connecting hole 42A gradually becomes larger toward the cleaning advancing direction.

As a result, the bending joint 40 engages with the proximal end side bending engaging portion 44 provided in the proximal end side handle portion 20 when the crossing angle βi of both handle portions 20 and 30 tries to exceed the initial bending angle β0. The mating surface 44K engages with the linear bending locking portion 31K made of the flat end surface 31 of the tip side handle portion 30, and the engaging surface of the tip side bending engaging portion 45 provided on the tip side handle portion 30. 45K engages with a linear bending locking portion 21K composed of a planar end surface 21 of the base end side handle portion 20, and prevents bending of both handle portions 20 and 30 in a direction exceeding the initial bending angle β0. do. When both handle portions 20 and 30 are bent in a direction in which their crossing angles βi are changed to be smaller than the initial bending angle β0, the flanks 44S and 45S of both bending engaging portions 44 and 45 correspond to the corresponding handle portions 20 and 30. It rotates relative to the locking portions 21K and 31K without any engagement, and does not hinder the bending of both handle portions 20 and 30.

Here, in the bending joint 40 of the present embodiment, the engaging surface 44K of the proximal end side bending engaging portion 44 formed on the proximal end side handle portion 20 is formed in the distal end side handle portion 30. It engages with the stop portion 31K in a relative rotation direction in a direction exceeding the initial bending angle β0 of both handle portions 20 and 30. At the same time, the engaging surface 45K of the distal end side bending engaging portion 45 formed on the distal end side handle portion 30 has a bending locking portion 21K formed on the proximal end side handle portion 20, and both of the handle portions 20 and 30 thereof. Engage in the relative rotation direction in the direction exceeding the initial bending angle β0 of. That is, the bent joint 40 is engaged with the engaging surface 45K and the bending locking portion 21K at two positions above and below the operation portion 11 side of the connecting shaft portion 43 and the cleaning head 12 side, and the engagement surface 44K. Since the engagement with the bending locking portion 31K is performed, it is possible to ensure the above-mentioned bending prevention of both handle portions 20 and 30.

In the bent joint 40, the proximal end side bending engaging portion 44 or the distal end side bending engaging portion 45 is provided only on at least one of the proximal end side handle portion 20 and the distal end side handle portion 30, and the bending engagement thereof is provided. The joint portions 44 and 45 may engage with one of the locking portions 31K and 21K provided on the corresponding handle portions 20 and 30.

Further, the bent joint 40 has an elastic means 50 interposed between the upper and lower sides of the base end side handle portion 20 and the tip end side handle portion 30. The repelling means 50 constantly repels both stalks 20 and 30 in the direction in which the intersection angle βi of both stalks 20 and 30 is set to the initial bending angle β0.

The elastic means 50 restores the crossing angle βi of both handle portions 20 and 30 to the side of the initial bending angle β0 when the operating force F of the user with respect to the operating portion 11 is reduced or disappears. Further, the elastic means 50 improves the followability of the cleaning head 12 to the surface to be cleaned.

The elastic means 50 of this embodiment is arranged inside the proximal end side bending engaging portion 44 and the distal end side bending engaging portion 45 formed in the proximal end side handle portion 20 and the distal end side handle portion 30, respectively. .. The elastic means 50 has a pedestal 51 inserted into the cylinder of the base end side handle portion 20 and fixedly arranged by a mounting pin 22 inserted into the pin hole 22P of the base end side handle portion 20, and a tip end side handle portion. It is composed of a rod-shaped elastic body 53 inserted into the cylinder of 30 and coupled to each of the pedestals 52 fixedly arranged by the mounting pin 32 inserted into the pin hole 32P of the tip side handle portion 30. The rod-shaped elastic body 53 is made of, for example, a spring material or rubber, and has an insertion portion into the hole portion 21A formed in the end surface 21 of the base end side handle portion 20 and a hole portion 31A formed in the end surface 31 of the tip end side handle portion 30. An intermediate portion sandwiched between the insertion portions is arranged between a pair of connecting pieces 42 provided on the tip side handle portion 30.

That is, the elastic means 50 of the first embodiment increases the bending deformation amount of the intermediate portion of the rod-shaped elastic body 53 according to the increase of the user's operating force F applied to the operating portion 11 at the time of cleaning, and increases the bending deformation amount on the proximal end side. The crossing angle βi of the handle portion 20 and the tip side handle portion 30 is gradually changed to be smaller than the initial bending angle β0.

Therefore, according to the bending joint 40 of the first embodiment, at least one of the proximal end side handle portion 20 and the distal end side handle portion 30 is prevented from bending in the direction exceeding the initial bending angle β0 of both handle portions 20 and 30. The proximal end side bending engaging portion 44 and / or the distal end side bending engaging portion 45 are formed, and the intersection angle βi of the proximal end side handle portion 20 and the distal end side handle portion 30 is set to the initial bending angle β0. It is assumed that the rod-shaped elastic body 53 is provided as the elastic means 50 for repelling both the handle portions 20 and 30. As a result, the bending joint 40 sets the crossing angle βi of both handle portions 20 and 30 to an initial bending angle β0 having a constant value of less than 180 degrees when not cleaned by a simple structure, and the user at the time of cleaning. It can be gradually changed to be smaller than the initial bending angle β0 according to the increase in the operating force F of.

(Example 2) (FIGS. 9 and 10)
The difference between the bent joint 40 according to the second embodiment and the bent joint 40 according to the first embodiment is that a tubular elastic body 61 instead of the rod elastic body 53 is applied as the elastic means 50.

The tubular elastic body 61 is interposed between the upper and lower sides of the base end side handle portion 20 and the tip end side handle portion 30 as in the first embodiment. The tubular elastic body 61 of the present embodiment is made of, for example, a spring material or rubber, and the proximal end side connecting piece 41 and the distal end side connecting piece provided therein in the proximal end side handle portion 20 and the distal end side handle portion 30. It is applied over both ends of those sandwiching 42. One end of the tubular elastic body 61 is adhered to the entire outer circumference of the base end side handle portion 20, and the above-mentioned mounting pin 22 is inserted and fixed, and the other end of the tubular elastic body 61 is the tip end. The mounting pin 32 is inserted and fixed around the entire outer circumference of the side handle portion 30, and the intermediate portion of the tubular elastic body 61 covers the connecting pieces 41 and 42 and the connecting shaft portion 43. ..

That is, the elastic means 50 of the second embodiment increases the bending deformation amount of the intermediate portion of the tubular elastic body 61 according to the increase of the user's operating force F applied to the operating portion 11 at the time of cleaning, and the base end. The crossing angle βi of the side handle portion 20 and the tip side handle portion 30 is gradually changed to be smaller than the initial bending angle β0.

(Example 3) (FIGS. 11 and 12)
The difference between the bent joint 40 according to the third embodiment and the bent joint 40 according to the first and second embodiments is that the rod-shaped elastic body 53 and the tubular elastic body 61 are combined and applied as the elastic means 50.

That is, the elastic means 50 of the third embodiment reduces the bending deformation amount of the intermediate portion between the rod-shaped elastic body 53 and the tubular elastic body 61 according to the increase in the user's operating force F applied to the operating portion 11 at the time of cleaning. The size is increased so that the intersection angle βi of the proximal end side handle portion 20 and the distal end side handle portion 30 is gradually changed to be smaller than the initial bending angle β0.

(Example 4) (FIGS. 13 and 14)
The difference between the bent joint 40 according to the fourth embodiment and the bent joint 40 according to the first embodiment is that two strip-shaped elastic bodies 71 and 72 instead of the rod-shaped elastic body 53 are applied as the elastic means 50.

The band-shaped elastic bodies 71 and 72 are interposed between the upper and lower portions of the base end side handle portion 20 and the tip end side handle portion 30 as in the first embodiment. The tubular elastic bodies 71 and 72 of this embodiment are made of, for example, a spring material or rubber. The band-shaped elastic body 71 and the band-shaped elastic body 72 are on the side facing the cleaning progress direction (front side) and the side facing the anti-cleaning progress direction (rear side) of the base end side handle portion 20 and the tip end side handle portion 30, respectively. In each case, the base end side connecting piece 41 and the tip end side connecting piece 42 provided therein are attached over both ends of the sandwiching piece. One end of each band-shaped elastic body 71, 72 is attached to the front side or the back side of the outer periphery of the base end side handle portion 22, and the above-mentioned mounting pin 22 is inserted and fixed, and each band-shaped elastic body 71, The other end of the 72 is attached to the front side or the back side of the outer periphery of the tip side handle portion 33, and the above-mentioned mounting pin 32 is inserted and fixed, and the intermediate portion of the band-shaped elastic bodies 71 and 72 is connected. It covers the pieces 41 and 42 and the connecting shaft portion 43.

That is, the elastic means 50 of the fourth embodiment increases the bending deformation amount of the intermediate portion of the band-shaped elastic bodies 71 and 72 according to the increase of the user's operating force F applied to the operating portion 11 at the time of cleaning. The crossing angle βi of the end side handle portion 20 and the tip side handle portion 30 is gradually changed to be smaller than the initial bending angle β0.

(Example 5) (FIG. 15)
The difference between the bent joint 40 according to the fifth embodiment and the bent joint 40 according to the first and fourth embodiments is that the rod-shaped elastic body 53 and the strip-shaped elastic bodies 71 and 72 are combined and applied as the elastic means 50.

That is, the elastic means 50 of the fifth embodiment has a bending deformation amount of the intermediate portion between the rod-shaped elastic body 53 and the strip-shaped elastic bodies 71 and 72 in response to an increase in the user's operating force F applied to the operating portion 11 during cleaning. Is increased, and the intersection angle βi of the proximal end side handle portion 20 and the distal end side handle portion 30 is gradually changed to be smaller than the initial bending angle β0.

According to the present invention, the physical load on the user is reduced in a cleaning tool that enables cleaning by pushing and moving the cleaning head on the surface to be cleaned in the direction of progress of cleaning by the operation force of the user applied to the operation unit. be able to.

10 Handle 11 Operation part 12 Cleaning head 20 Base end side handle part 30 Tip side handle part 40 Bending joint 43 Connecting shaft part 44 Base end side bending engaging part 45 Tip side bending engaging part 50 Repellent means 100 Cleaning tool F Operation Force βi Crossing angle β0 Initial bending angle

Claims (4)

The base end side of the handle is used as an operation unit to be gripped by the user's hand, the handle has a cleaning head at the tip, and the cleaning head placed on the surface to be cleaned is arranged in the cleaning progress direction from the operation unit. It is a cleaning tool that enables cleaning by pushing the cleaning head on the surface to be cleaned in the direction of progress of cleaning by the operation force of the user added to.
Each of the proximal end side and the distal end side sandwiching the intermediate portion in the longitudinal direction of the handle is provided as the proximal end side handle portion and the distal end side handle portion, and the proximal end side handle portion and the distal end side handle portion are bent via a bending joint. Can be connected,
In the bent joint, the crossing angle formed by the base end side handle portion and the tip end side handle portion on the side facing the anti-cleaning advancing direction is set to an initial bending angle having a constant value of less than 180 degrees during non-cleaning, and during cleaning. It is configured to gradually change smaller than the initial bending angle according to the increase in the operating force of the user applied to the operation unit .
Further, the bent joint is
A connecting shaft portion that flexibly connects the base end side handle portion and the tip end side handle portion,
It is formed on at least one of the base end side handle portion and the tip end side handle portion, and engages with the bending locking portion provided on the other handle portion when the crossing angle of both handle portions is about to exceed the initial bending angle. A cleaning tool configured to have a bending engaging portion that prevents bending of both of these handle portions in a direction exceeding the initial bending angle . The bending engaging portion formed on the base end side handle engages with the bending locking portion formed on the tip end side handle portion in a relative rotation direction in a direction exceeding the initial bending angle of both of the handle portions. With
The bending engaging portion formed on the tip side handle engages with the bending locking portion formed on the base end side handle in a relative rotation direction in a direction exceeding the initial bending angle of both of the handle portions. The cleaning tool according to claim 1 . It is interposed between the base end side handle portion and the tip end side handle portion, and has an elastic means for repelling both handle portions in a direction in which the intersection angle of both handle portions is set as an initial bending angle. The cleaning tool according to claim 1 or 2 . The cleaning tool according to claim 3 , wherein the elastic means is arranged inside a bending engaging portion formed on at least one of a proximal end side handle portion and an distal end side handle portion.

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