JP7137272B2 - Cleaning tool with end cap and manufacturing method - Google Patents

Description

The present invention relates to cleaning implements having handles and, more particularly, to cleaning implements having end caps at the ends of the handles.

Japanese Patent Laying-Open No. 2012-90947 (cited document 1) discloses a handle with an end cap for a cleaning tool for the purpose of improving stability when the handle of the cleaning tool is leaned against a wall surface or the like. In the cleaning tool, the end cap is made of an elastic material and the end face of the end cap is formed with an inclined surface, thereby improving the stability when the tool is stood upright.

10A and 10B, an end cap 114 is attached to the upper end portion 110b of a handle 110 used by connecting the lower end portion to the main body of the cleaning tool. By fitting the upper end portion 110b of the handle 110 into the mounting hole 115, the upper end portion 110b of the handle 110 is mounted. In addition, the end cap 114 has a covering end surface 114a that covers the end surface portion 110c of the handle 110 and is inclined with respect to a plane perpendicular to the central axis direction X of the handle 110. The end cap 114 is tapered. The shaped distal edge portion 114b forms an elastically deformable cushion portion 116. As shown in FIG. Further, an engaging notch 126 is formed by cutting from the end face portion 110c toward the lower end of the handle 110 at the upper end portion 110b of the grip portion 121 (handle 110) having a reduced diameter. When the end cap 114 is attached, an engaging piece 127 provided inside the mounting hole 115 of the end cap 114 is inserted into the engaging notch 126 and engaged.

However, since the covered end surface 114a of the end cap 114 is an inclined surface, when the end cap 114 is gripped by hand, the ridgeline of the boundary of the inclined surface contacts the palm or fingers. Therefore, the handle with the end cap has a drawback that when the end cap portion is gripped by the hand, the user feels a sense of incongruity and is difficult to hold. In addition, since the end cap is made of an elastic material, the end cap deforms when a large external force is applied, and the gap between the engaging piece 127 of the end cap and the engaging notch 126 formed in the upper end portion 110b of the handle 110 is reduced. is disengaged, and the end cap tends to come off from the upper end portion 110b of the handle.

Registered utility model No. 3018118 (reference 2) discloses a grip end for a cleaning tool, which has a hanging hole used for storage and has the purpose of securely connecting a cap body to the grip end. there is At the grip end, the cap body has a pair of elastic pieces, and the elastic pieces are inserted into and engaged with the cylindrical grip end with the aim of securely attaching the cap body to the grip end. there is

11, an engagement hole 232 is formed in the radial direction of a hollow cylindrical grip end 230, and a pair of elastic pieces of a cap body 233 are formed at the end of the grip end 230. 236 is inserted, the engagement ring portion 237 provided at the tip of the elastic piece 236 is engaged with the engagement hole 232 , and the cap body 233 is attached to the grip end 230 . An engaging hole 232 provided in the grip end 230 and an engaging ring portion 237 provided at the tip of the elastic piece 236 form a hanging hole used for storage.

However, the engaging hole 232 provided in the grip end 230 must be separated from the upper end portion 230a of the grip end 230 to some extent in order to ensure strength during suspension. Therefore, it is necessary for the elastic piece 236 to have a considerable length in the axial direction. Therefore, when a strong external force is applied, the elastic piece 236 elongated in the axial direction is deformed, and the engagement between the engagement ring portion 237 and the engagement hole 232 is easily disengaged. The grip end described in Document 2 has a drawback that the cap body tends to come off from the grip end when a strong external force is applied.

JP 2012-90947 A Registered Utility Model No. 3018118

As described above, conventional techniques for cleaning tools with end caps have the drawbacks that it is not easy to grasp the end cap portion by hand, and that the end cap tends to come off from the end of the handle when a strong external force is applied. rice field. Moreover, since the engaging portion between the end cap and the end of the handle can be accessed from the outside through the suspension hole, there is a drawback that it is easily affected by unexpected external force.
Therefore, an object of the present invention is to provide a handle that is easy for a user to hold without causing discomfort when the end cap portion is held by the hand, and that the end cap is less likely to come off from the end of the handle even when a strong external force is applied, and To provide a cleaning tool with an end cap in which an engaging portion between the end cap and the end of a handle is hidden from the outside, making it inaccessible and easy to manufacture. A further object of the present invention is to provide a simple method of manufacturing the end cap of the cleaning tool.

The present invention has been made to solve the above problems, and a first form of the present invention is a cleaning tool having a handle, wherein an inner member and an outer member are integrated at the handle end of the handle. The inner member and the handle end are both made of a rigid member, and the engagement of the inner member and the handle end causes the end cap to be attached to the handle end. A cleaning tool characterized by being attached.

In a second aspect of the present invention, the distal end portion of the handle end portion has a cylindrical shape with a reduced diameter, the inner member has an engaging main portion, the distal end portion has an engaging secondary portion, and the inner member covers the entire distal end portion from the outside and the main engagement portion and the secondary engagement portion are engaged with each other, so that the end cap is attached to the end portion of the handle, and the main engagement portion is connected to the engagement convex portion. , the secondary engaging portion is an engaging concave portion or an engaging hole portion, and when the engaging secondary portion is an engaging convex portion, the engaging main portion is an engaging concave portion or an engaging hole portion. A cleaning tool.

A third form of the present invention is a cleaning tool in which the outer member is made of a soft member.

According to a fourth aspect of the present invention, the cleaning tool has a wiping body connected to the other side of the handle from the handle end, the wiping body placed on a horizontal floor and the handle gently leaned against a vertical planar wall and supported by hand if necessary, said outer member of said end cap abutting said wall and at least one of the axis of said handle end. The cleaning tool has a leaning angle of the handle and an arrangement of the wiping body such that the angle formed by the part and the wall is 30° or less.

A fifth form of the present invention is a cleaning tool in which the outer member outer surface of the outer member and the handle end outer surface of the handle end portion are connected without a step in appearance.

In a sixth aspect of the present invention, the cross-sectional shape of the outer surface of the outer member when viewed in a cross-section perpendicular to the axial direction of the handle end is at least the cross-section in which the diameter of the curve representing the cross-sectional shape is maximum. It is a cleaning tool that has a substantially polygonal shape when viewed.

A seventh form of the present invention is the cleaning tool, wherein the cross-sectional shape of the outer surface of the handle end viewed from the cross section perpendicular to the axial direction of the handle end is substantially polygonal.

An eighth form of the present invention is a method for manufacturing the end cap of the cleaning tool, comprising the steps of: forming the inner member by injection molding; and forming the outer member by fitting it to the outer surface of the inner member. A method for manufacturing an end cap characterized by comprising:

A ninth aspect of the present invention is a method of manufacturing an end cap for the cleaning tool, wherein the inner member has a through hole, holding the inner member; disposing an outer frame mold across a gap; injecting a liquid resin from the inside of the inner member through the through hole into the outer member forming gap; curing the liquid resin to form a cured product; and obtaining the outer member integrated with the inner member; and separating the outer frame mold from the outer member. is a method of manufacturing an end cap.

According to a first aspect of the present invention, there is provided a cleaning tool having a handle, a double-structured end cap formed by integrating an inner member and an outer member is attached to the handle end of the handle, and the inner member and the handle end are both made of rigid material, and engagement of the inner member and the handle end attaches the end cap to the handle end.
The handle of the cleaning tool to which the end cap is attached is generally made of rigid material, including the handle end. In addition, the end caps of the conventional cleaning tools described in Patent Document 1 and Patent Document 2 are made of a soft member or an elastic material. There was a risk that the tape could come off from the end of the handle. In the cleaning tool of this embodiment, the end cap is attached to the end of the handle by engaging the inner member of the double-structured end cap with the end of the handle. Since the inner member is also a hard member that is not easily deformed by an external force, this engagement is between hard members, and the engagement is strong. Therefore, even when a strong external force is applied, there is little risk that the inner member and/or the handle end will be deformed and disengaged, causing the end cap to come off from the handle end.

According to the second aspect of the present invention, the distal end portion of the handle end portion has a cylindrical shape with a reduced diameter, the inner member has a main engagement portion, the distal end portion has a secondary engagement portion, and the The end cap is attached to the handle end by the inner member covering the entire tip portion from the outside and the main engagement portion and the secondary engagement portion are engaged, and the main engagement portion is engaged. When it is a convex portion, the secondary engaging portion is an engaging concave portion or an engaging hole, and when the secondary engaging portion is an engaging convex portion, the main engaging portion is an engaging concave portion or an engaging hole. We can provide a cleaning tool that is a part.
In the cleaning tool of the present embodiment, the inner member of the end cap covers the entire cylindrical distal end portion with a reduced diameter from the outside, and the engaging slave portion and the engaging main portion are engaged to form the end cap. Attached to the end of the handle. Since the inner member of the end cap covers the cylindrical distal end portion from the outside, when the distal end portion is engaged with the portion by inserting a portion of the end cap into the cylindrical distal end portion as in the conventional art. In contrast, when an external force that rotates the end cap is applied, the distance from the axis of the cylindrical tip to the point of action of the drag force exerted by the tip against the end cap increases. . Therefore, the moment of the drag is increased. Therefore, the cleaning tool of this embodiment has the advantage that the end cap is less likely to rotate relative to the cylindrical distal end portion even when a large external force is applied, and the end cap is less likely to come off the cylindrical distal end portion.
Further, in the cleaning tool of this embodiment, the engagement between the main engaging portion and the secondary engaging portion is a firm engagement between the engaging convex portion and the engaging concave portion or between the engaging convex portion and the engaging hole portion. Therefore, the cleaning tool of this embodiment has the advantage that the end cap is difficult to come off from the end of the handle. Furthermore, in the cleaning tool of this embodiment, since the inner member of the end cap covers the entire cylindrical distal end portion of the handle end portion from the outside, the main engagement portion and the secondary engagement portion are hidden from the outside. It has the advantage of being inaccessible and less susceptible to unforeseen external forces.

According to the 3rd form of this invention, the cleaning tool which the said outer member consists of soft members can be provided.
In the cleaning tool of this embodiment, since the outer member of the end cap is made of a soft material, even if the cleaning tool leaning against the wall or the like falls down due to carelessness or other causes, the impact at the time of ground contact is absorbed. There is an advantage that the cleaning tool is less likely to be damaged by the movement of the cleaning tool, and that the impact noise emitted to the surroundings when it falls down is reduced. Furthermore, when the cleaning tool of this embodiment is leaned against a wall, if the wall and the outer member of the end cap abut against each other, a large frictional force may act between the wall and the outer member made of a soft member. has the advantage that it is stable and does not easily fall over when it is leaned against a wall.

According to a fourth aspect of the invention, the cleaning tool has a wiping body connected to the handle on the other side of the handle from the handle end, the wiping body being placed on a horizontal floor. When the handle is gently tilted against a vertical planar wall and supported by hand if necessary, the outer member of soft material of the end cap abuts the wall and the end of the handle. It is possible to provide a cleaning tool in which the leaning angle of the handle and the placement of the wiping body are such that the angle formed by at least a part of the axis of the cleaning tool and the wall is 30° or less.
In the cleaning tool of this embodiment, when the cleaning tool is stored by leaning it against the wall of the storage space when not in use, when the handle is leaned at an angle of 30° or less, in a normal stored state close to vertical, the soft member of the end cap Since the portion of the outer member made of the soft material abuts against the wall, a large frictional force can act between the wall and the outer member made of the soft material. It has the advantage of not falling over easily.
Here, the reason why the leaning angle is limited to 30° or less is that, in the case of a normal handle that has a straight shape or is not so bent, firstly, in the case of a large leaning angle close to the horizontal handle. Secondly, a large leaning angle exceeding 30° is not specified because the handle almost always abuts against the wall at the outer member of the end cap. In the case of , a large floor space is required to store the cleaning tools, and at home, the stored cleaning tools will interfere with the passage of people. This is because it is unrealistic to think about it, and it does not match the actual use of the cleaning tool.

According to the fifth aspect of the present invention, it is possible to provide a cleaning tool in which the outer member outer surface of the outer member and the handle end outer surface of the handle end portion are connected without a step in appearance.
In the cleaning tool of this embodiment, the outer surface of the outer member of the end cap and the outer surface of the handle end portion of the handle end portion are connected without a step in appearance, so that the end cap and the end portion of the handle are integrated in surface shape. there is Therefore, the user can grip the handle without feeling a step regardless of where the end of the handle is gripped or from which direction. The user does not need to be conscious of where to grip the end of the handle or how to grip it. The advantage of the cleaning tool of this embodiment is that the user can smoothly grasp the end of the handle without psychological resistance, both visually and from experience, and can easily start cleaning work. In addition, the expression "no level difference in appearance" means that the level difference is at least 0.2 mm or less in consideration of human eyesight and skin sensitivity. If possible, the step is preferably 0.1 mm or less, more preferably 0.05 mm or less.

According to the sixth aspect of the present invention, the cross-sectional shape of the outer surface of the outer member when viewed in a cross-section perpendicular to the axial direction of the handle end has at least the maximum diameter of the curve representing the cross-sectional shape. A cleaning tool can be provided that is generally polygonal when viewed in cross section.
In the cleaning tool of this embodiment, when the cleaning tool is leaned against the wall at a leaning angle of 30° or less, which is the normal housed state, the outer surface of the outer member of the end cap, which has a substantially polygonal cross section, and the wall. Since they abut, the contact area with the wall is widened. Therefore, the cleaning tool of this embodiment has an advantage that it is highly stable when leaned against a wall and does not easily fall over. Also, when the user grips the handle of the cleaning tool by hand, if the user grips the end cap portion, the cross-sectional shape of the outer surface of the outer member of the end cap is substantially polygonal, so the user can hold the handle in the hand. The end cap and handle are difficult to rotate and can be gripped firmly. Therefore, the cleaning tool of this embodiment also has the advantage that the handle can be easily gripped by the user. The polygon on which the "substantially polygonal" is based may be any polygon such as a triangle, quadrangle, pentagon, or hexagon. From the viewpoint of ensuring the contact area and/or ease of gripping, The "substantially polygonal shape" in the present invention is more preferably substantially triangular or substantially quadrangular, and more preferably substantially triangular. In addition, "substantially polygonal" means not only a polygon, but also an R (curved portion) is provided in the vicinity of each vertex of the polygon, and the remaining portion of each side of the polygon is more than that. It also includes a shape replaced with a curved portion with a large radius of curvature, or a shape left with a straight portion without replacement. Here, from the viewpoint of ensuring the contact area and/or the ease of gripping, the maximum value of the radius of curvature of each side of the substantially polygonal shape (infinite ∞ when including a straight line portion) is at least substantially large. It is preferably equal to or larger than the square diameter (assumed to be D), and more preferably equal to or larger than 2×D. In addition, the diameter of a substantially polygon means the maximum value of the linear distance between two arbitrary points P and Q on the circumference of the substantially polygon.

According to the seventh aspect of the present invention, it is possible to provide a cleaning tool in which the cross-sectional shape of the outer surface of the handle end viewed in a cross section orthogonal to the axial direction of the handle end is substantially polygonal.
In the cleaning tool of this embodiment, when the user holds the handle of the cleaning tool by hand, when the user holds the outer surface of the handle end, the outer surface of the handle end has a substantially polygonal cross-sectional shape. Because of this, the handle does not easily rotate in the hand and can be gripped firmly. Therefore, the cleaning tool of this embodiment has the advantage that the handle can be easily gripped by the user. The polygon on which the "substantially polygonal" is based may be any polygon such as a triangle, quadrangle, pentagon, or hexagon. From the viewpoint of ensuring ease of designing, the "substantially polygonal shape" in the present invention is more preferably substantially triangular or substantially quadrangular, and more preferably substantially triangular. In addition, from the viewpoint of ensuring the ease of gripping in the above sense, the maximum value of the radius of curvature of each side of the substantially polygon (infinite ∞ when including a straight line part) It is preferably equal to or larger than the square diameter (assumed to be D), and more preferably equal to or larger than 2×D.

According to an eighth aspect of the present invention, there is provided a method of manufacturing an end cap for a cleaning tool, comprising the steps of: forming the inner member by injection molding; A method for manufacturing an end cap can be provided, comprising the steps of:
According to the manufacturing method of the end cap of this embodiment, of the end cap having a double structure in which the inner member and the outer member are integrated, the inner member is first formed by injection molding, and the outer member is formed separately from the inner member. An end cap is manufactured by forming by any method such as injection molding, and then attaching the outer member to the outer surface of the inner member. Therefore, the manufacturing method of this embodiment has the advantage of being able to easily manufacture the double-structured end cap by injection molding and capping. Note that "capping" means to integrate the inner member and the outer member by arranging the outer member so as to cover the outer surface of the inner member by any method such as fitting, fusion bonding, adhesion, or crimping. means

According to a ninth aspect of the present invention, there is provided a method of manufacturing an end cap for a cleaning tool, wherein the inner member has a through hole, holding the inner member; disposing an outer frame mold across a forming gap; injecting a liquid resin from the inside of the inner member through the through hole into the outer member forming gap; The method comprises at least the step of obtaining the outer member integrated with the inner member by using the outer member as a cured product, and the step of separating the outer frame mold from the outer member. A method for manufacturing an end cap for a cleaning tool can be provided.
The method for manufacturing the end cap of this embodiment is a method for manufacturing an end cap having a double structure in which an inner member and an outer member are integrated by a so-called two-color injection molding method. By the way, if the end cap of the present invention is manufactured by the usual two-color injection molding method, first the inner member is formed, and then the liquid resin for forming the outer member is injected from the injection port arranged outside the inner member. The liquid resin is injected and cured to form the outer member on the outside of the inner member, the outer frame mold is removed, and finally the cured liquid resin for forming the outer member is stretched into a columnar shape near the injection port. Cut at appropriate points to complete the end cap. However, in such a normal two-color injection molding method, a step occurs on the outer surface of the outer member at the portion where the cured product of the liquid resin for forming the outer member, which is stretched in a columnar shape near the injection port, is cut. The external surface lacks continuity in appearance, and the user feels uncomfortable when gripping the handle of the cleaning tool, making it difficult to hold.
Therefore, in the method of manufacturing the end cap of the present embodiment, the inner member has a through hole, the liquid resin is injected from the inside of the inner member through the through hole, and the liquid resin is cured to form the outer member. Thus, the portion where the hardened liquid resin for forming the outer member that extends in a columnar shape near the injection port is cut is located inside the inner member rather than on the outer surface of the outer member. By doing so, continuity and smoothness in appearance of the outer surface of the outer member can be ensured. The advantage of the manufacturing method of the end cap of this embodiment is that the outer surface of the outer member of the end cap is formed smoothly, so that the user can easily hold the handle of the cleaning tool and does not feel uncomfortable. be.

FIG. (1A) is an external perspective view of a cleaning tool according to one embodiment of the present invention, in which the cross-sectional shape of the outer surface of the handle end is substantially triangular, and FIG. (1B) is the handle of FIG. (1A). FIG. 12 is an enlarged perspective view of the portion including the ends and end caps; FIG. 2 is an exploded perspective view of FIG. 1B with the end cap separated from the handle end. FIG. (3A) is an end view of the end cap of the embodiment of FIG. 2, looking at the engagement portion between the end cap and the tip of the handle end in a cross section perpendicular to the axis of the handle end; , (3B) is an end view of the tip of the handle end. FIG. 4A is an end view of the end cap taken along a cross section containing the axis of the handle end in the embodiment of FIG. 2, and FIG. 4B is an end view of the handle end as well. FIG. 5A is an end view of the end cap seen in another cross section including the axis of the handle end in the embodiment of FIG. 2, and FIG. 5B is an end view of the handle end as well. FIG. (6A) shows a cleaning tool according to another embodiment of the present invention, in which the cross-sectional shape of the outer surface of the handle end is substantially square, and the engagement portion between the end cap and the tip of the handle end is FIG. 6B is an end view of the end cap as seen in a section perpendicular to the axis of the handle, and FIG. 6B is also an end view of the tip of the handle end; FIG. (7A) is an end view of the end cap seen in a cross section including the axis of the handle end in FIG. 6, and FIG. (7B) is an end view of the handle end. FIG. (8A) is a cross-sectional view of the end cap, including the axis of the handle end, in yet another embodiment of the cleaning tool of the present invention, wherein the end cap is inserted inside and engages the handle end. Figure 8B is an end view of the handle end. FIG. 9 is an end view illustrating a step of forming an outer member by injection molding in a method of manufacturing an end cap for a cleaning tool, which is one embodiment of the present invention. FIG. 10 is an explanatory diagram of a cleaning tool with an end cap in the prior art, and the end cap is a single layer structure made of elastic material. FIG. 11 is an illustration of another prior art cleaner with an end cap, wherein the engagement portion is externally accessible through a suspension hole.

Next, the cleaning tool with an end cap of the present invention and the form for carrying out the manufacturing method of the end cap will be described in detail with reference to the drawings.

FIG. (1A) is an external perspective view of a cleaning tool 1 with an end cap having a handle 11, which is one embodiment of the present invention. An end cap 4 is attached to the handle end portion 2 of the handle 11, and a wiping body grip portion 15 is rotatably connected to the other end portion 12 of the handle 11, which is the other side of the handle end portion 2, A wiping body 16 for cleaning a floor surface or the like can be attached to the wiping body grip part 15 . The wiping body gripping portion 15 is connected to the other end portion 12 of the handle so as to be rotatable about one axis, about two axes, or about any solid angle. In one embodiment, handle 11 is comprised of grip 14 and handle body portion 13 . In this embodiment, the handle end portion 2 constitutes one end portion of the grip 14 and the handle other end portion 12 constitutes one end portion of the handle body portion 13 .

Here, the leaning angle θ will be explained. Suppose that the wiping body 16 of the cleaning tool 1 is placed on the floor, the handle 11 of the cleaning tool 1 is leaned against a vertical wall, and if necessary the handle 11 is supported by the hand so as not to fall. At this time, the leaning angle θ of the handle 11 of the cleaning tool 1 is defined by the axial direction 51 of the handle (the direction parallel to the axial center (the direction of the line segment OX)) and the direction 52 of the vertical line (the direction of the line segment OG). defined as the angle θ formed by When the axis of the handle 11 is bent, the leaning angle θ is defined for each minute portion of the handle 11 .

FIG. 1B is an enlarged perspective view of the handle end 2 and end cap 4 of FIG. 1A. The fine lines drawn in the drawing are not the pattern of the surface, but the shading lines indicating the unevenness of the surface. The same applies to subsequent figures. In this embodiment, the cross-sectional shape of the handle end outer surface 26 and the cross-sectional shape of the outer member outer surface 46 of the end cap 4 are substantially triangular. It is difficult to slip and rotate around the axis and is easy to hold. In addition, since the outer surface 26 of the handle end and the outer surface 46 of the outer member of the end cap 4 are integrated without a step in appearance, it is easy to grasp without any sense of incongruity when held by hand. A person can perform cleaning work without discomfort. These effects are exhibited not only when the cross-sectional shape of the outer member outer surface 46 is substantially triangular, but also when the cross-sectional shape is substantially quadrangular or generally polygonal. has a large effect, and the effect is particularly large when the cross-sectional shape is substantially triangular.

Since the outer member 47 of the end cap 4 is made of a soft member, the impact is absorbed when the cleaning tool 1 falls on the floor or the like, and the impact sound emitted to the surroundings when the cleaning tool 1 falls is reduced. can be done.
Any material having a lower hardness than the inner member of the end cap 4 can be used as the soft member. A suitable material for the soft member is any material having a Rockwell hardness (scale R) of less than 60, or if hardness measurement by Rockwell hardness is not appropriate and rubber hardness measurement by durometer is appropriate, Any material with a rubber hardness of 60-90. Here, the rubber hardness is a value measured with a durometer type A specified in JIS K 6253-3. Various materials that satisfy the above properties can be used as the soft member, and for example, a thermoplastic elastomer (TPE) can be particularly preferably used.

In this embodiment, since the cross-sectional shape of the outer member outer surface 46 of the end cap 4 is substantially triangular, the contact area is wide when the end cap 4 is leaned against a wall surface or the like, resulting in good stability. Furthermore, since the outer member 47 of the end cap 4 is made of a soft material, the coefficient of friction between the end cap 4 and the wall surface is large when the end cap 4 is leaned against the wall surface. . These effects are exhibited not only when the cross-sectional shape of the outer member outer surface 46 is substantially triangular, but also when the cross-sectional shape is substantially quadrangular or generally polygonal. has a large effect, and the effect is particularly large when the cross-sectional shape is substantially triangular.

FIG. 2 is an exploded perspective view showing the state in which the end cap 4 is separated from the handle end portion 2 in FIG. (1B). The end cap 4 has an inner hard outer soft double structure in which an outer member 47 and an inner member 41 (hidden and not visible in FIG. 2) are integrated. Both the inner member 41 and the handle end portion 2 are made of rigid material, and the engagement between the inner member 41 and the handle end portion 2 causes the end cap 4 to be attached to the handle end portion 2 . Since the engagement is between hard members, the connection is strong and does not easily come off.
As the hard member used for the handle end portion 2, any material having a Rockwell hardness (scale R) of 60 or more is selected in consideration of the function, appearance, workability, etc. required for the handle end portion of the cleaning tool. Various materials can be appropriately selected and used, and in particular, POM (polyacetal), PP (polypropylene), PA66 (nylon), etc. can be preferably used.
As the hard member used for the inner member 41 of the end cap 4, various materials are selected from arbitrary materials having a Rockwell hardness (scale R) of 60 or more, taking into account the functions and workability required for the inner member. can be appropriately selected and used, and in particular, POM (polyacetal), PP (polypropylene), PA66 (nylon), etc. can be preferably used. In many embodiments of the present invention, the inner member 41 of the end cap 4 is not visible to the user of the cleaner 1, so the appearance of the inner member 41 is less important. Also, the hard member used for the handle end portion 2 and the hard member used for the inner member 41 may be of the same material or may be of different materials.

In this embodiment, the distal end portion 3 of the handle end portion 2 is cylindrical with a reduced diameter. The tip portion 3 is provided so as to protrude from the handle end portion end surface 21 of the handle end portion 2 . One or more engaging slaves 32 are provided on the outer surface of the tip 3 . In this embodiment, the engagement follower portion 32 is an engagement protrusion, but it is also possible to configure the engagement follower portion 32 to be an engagement recess. An alignment engagement follower 34 is further provided on the outer surface of the tip 3 . In this embodiment, the alignment engagement follower portion 34 is an engagement recess, but it is also possible to configure the alignment engagement follower portion 34 to be an engagement protrusion. A tip portion end surface 31 is provided at the tip of the tip portion 3 . The end surface 31 of the tip portion is an inclined surface that descends outward. This inclined surface is such that the inner member 41 (hidden and not visible in FIG. 2) of the end cap 4 engages so as to cover the distal end portion 3 of the handle end portion 2 from the outside, so that the end cap 4 is engaged with the handle end portion. 2, it has the effect of facilitating the sliding movement of the inner member 41 on the outside of the distal end portion 3. A distal end ventilation hole 33 is provided at the lowest portion of the distal end portion 3 so as to pass through the distal end portion 3 . Since the tip ventilation hole 33 is provided through the tip 3, the tip ventilation hole 33 functions as a ventilation hole. It is possible to prevent the internal pressure of the air existing in the space surrounded by the portion 3 and the inner member 41 of the end cap from increasing, and to prevent the mounting from being hindered due to the increase in the pressure of the air. The inner bottom surface of the tip vent 33 is preferably continuous with or flush with the handle end surface 21 . With this configuration, when the end cap 4 is attached to the handle end portion 2, ventilation between the enclosed space and the outside air is ensured until just before the end cap end face 49 and the handle end end face 21 come into contact. Therefore, the pressure of the air in the enclosed space can be maintained at substantially atmospheric pressure, and it is possible to prevent the installation from being hindered due to the increased pressure of the air in the enclosed space.

FIG. 3A shows the engagement portion between the end cap 4 and the tip portion 3 of the handle end portion 2 in the embodiment of FIG. 3B is an end view of the tip 3 of the handle end 2. FIG. The end cap 4 has an inner hard outer soft double structure consisting of an inner member 41 and an outer member 47 that are integrated.
One or more engaging main portions 42 are formed on the inner surface of the inner member 41 . In the attached state, the main engagement portion 42 engages with one or more sub-engagement sub-portions 32 formed on the outer surface of the distal end portion 3 of the handle end portion 2 so that the distal end portion 3 and the end portion of the handle end portion 2 are engaged. The inner member 41 of the cap 4 is firmly coupled. In one embodiment, the engagement main portion 42 is an engagement recess or engagement hole, and the engagement secondary portion 32 is an engagement protrusion. In another embodiment, the engagement main portion 42 is an engagement projection and the engagement secondary portion 32 is an engagement recess or an engagement hole.
An alignment engagement main portion 44 is further formed on the inner surface of the inner member 41 . The alignment engagement main portion 44 engages the alignment engagement minor portion 34 formed on the outer surface of the handle end portion 2 in the installed state. In one embodiment, the alignment engagement major portion 44 is a ridge and the alignment engagement minor portion 34 is a concave groove. In another embodiment, the alignment engagement major portion 44 is a concave groove and the alignment engagement minor portion 34 is a ridge.

The maximum distance from the end cap axis 48 to the outer member outer surface 46 is referred to as the maximum outer surface radius L. Further, the distance from the shaft center 23 of the handle end portion to the engagement slave portion 32 is defined as the distance R between the shaft center engaging portions. Here, the axial center 48 of the end cap is a straight line extending in the direction of the end cap 4 from the axial center of the handle end portion 2 when attached. At this time, an external force acts on the end cap 4 to rotate the end cap 4 around the axis, thereby disengaging the end cap 4 and separating the end cap 4 from the handle end portion 2 . From the viewpoint of prevention by torque with large frictional force and resistance, the ratio R/L between the axial engagement portion distance R and the outer surface maximum radius L is preferably 0.5 or more, and is 0.6 or more. is more preferable, and 0.7 or more is even more preferable. In addition, from the viewpoint of ensuring the thickness and strength of the end cap 4 and the strength of the engaging main portion 42, the ratio R/L should be approximately 0.9 or less, although it depends on the material of the inner member 41 and the like. is preferred, 0.8 or less is more preferred, and 0.7 or less is even more preferred. The above evaluation of the ratio R/L is effective not only when the cross-sectional shapes of the outer member outer surface 46 and the handle end outer surface 26 are substantially triangular, but also when they are substantially quadrangular or generally polygonal. be.

FIG. (4A) is an end view of the end cap 4 in the embodiment of FIG. 2, viewed from a cross section (a broken plane including the broken line AYB in FIG. 3) including the axis 23 of the handle end. FIG. 4B is also an end view of the tip portion 3 of the handle end portion 2. FIG. In one embodiment, the interior of the handle end 2 is hollow, providing a handle end cavity 24 surrounded by a tubular handle end wall 25 . A distal end surface 31 is provided at the distal end of the distal end portion 3 of the handle end portion 2 . The end surface 31 of the tip portion is an inclined surface that descends outward. This inclined surface engages the inner member 41 of the end cap 4 so as to cover the distal end portion 3 of the handle end portion 2 from the outside, and when the end cap 4 is attached to the handle end portion 2, the inner member This has the effect of facilitating the sliding movement of 41 on the outside of tip 3 . In another embodiment of the present invention, the inside of the handle end portion 2 may be configured so as not to be hollow.

When the end cap 4 is engaged so as to cover the entire distal end portion 3 of the handle end portion 2 from the outside and the end cap 4 is attached to the handle end portion 2, the outer surface 46 of the end cap 4 and the outer member outer surface 46 of the end cap 4 are aligned. Since the outer surface 26 of the handle end is integrated without a step in appearance, the engaging portion consisting of the engaging main portion 42 and the engaging secondary portion 32 and the tip vent 33 cannot be visually recognized or accessed from the outside. Therefore, in the cleaning tool of this embodiment, there is little possibility that an unexpected external force will be applied to the engaging portion, disengaging the engaging portion, and causing the end cap 4 to separate from the handle end portion 2 .

The lowermost portion of the end cap 4 that abuts the handle end face 21 when installed is the end cap face 49 . Inner member height K is the height from the lowest point of the end cap end face 49 to the highest point of the inner member 41, as the height is measured along the end cap axis 48. . Here, the axial center 48 of the end cap is a straight line extending in the direction of the end cap 4 from the axial center of the handle end portion 2 when attached. Since the inner member 41 is made of a hard member, it has a large elastic constant, but it is slightly elastically deformed when an extremely large external force acts on it. By reducing the height K of the inner member, the end cap 4 is prevented from being disengaged and separated from the handle end portion 2 due to elastic deformation of the end cap 4 due to external force acting on the end cap 4. From the point of view, the ratio K/R between the height K of the inner member and the distance R between the central engaging portions is preferably 2.0 or less, more preferably 1.6 or less, and 1.2 or less. It is even more preferable to have From the viewpoint of securing the thickness and strength of the inner member 41 and the strength and space of the engaging portion, the ratio K/R is generally 0.4 or more, although it depends on the material of the inner member 41 and the like. is preferred, 0.6 or more is more preferred, and 0.8 or more is even more preferred. The above evaluation of the ratio K/R is effective not only when the cross-sectional shapes of the outer member outer surface 46 and the handle end outer surface 26 are substantially triangular, but also when they are substantially quadrangular or generally polygonal. be.

The portion of the handle end 2 that abuts the end cap end face 49 located at the bottom of the end cap 4 when installed is the handle end end face 21 . The reduced diameter tip 3 of the handle end 2 protrudes above the handle end face 21 . The tip length H is the height from the lowest point of the handle end face 21 to the highest point of the tip end face 31, assuming that the height is measured along the axis 23 of the handle end. is. An external force in a direction intersecting with the axis 23 of the handle end acts on the end cap 4, rotates the end cap 4 so as to fall down, disengages the end cap 4 and the tip portion 3, and From the viewpoint of preventing the end cap 4 from being detached from the handle end 2 by increasing the length H of the tip, the ratio H/R between the length H of the tip and the distance R between the shaft center engagement portions is preferably 0.4 or more, more preferably 0.5 or more, and even more preferably 0.6 or more. Further, from the viewpoint of ensuring the strength and space of the engaging portion, the ratio H/R depends on the material of the tip portion 3 and the like, but is generally preferably 0.2 or more, and is preferably 0.3 or more. It is more preferably 0.4 or more. From the viewpoint of ensuring sufficient thickness and strength of the inner member 41, the ratio H/K between the length H of the tip portion and the height K of the inner member is preferably 0.8 or less, and 0.7 or less. is more preferably 0.6 or less. Note that the above evaluation of the ratio H/R and the ratio H/K is not limited to cases where the cross-sectional shapes of the outer member outer surface 46 and the handle end portion outer surface 26 are substantially triangular, but also substantially rectangular and generally polygonal. It is also effective when

FIG. 5A shows the embodiment of FIG. 2 viewed from a different cross section from FIG. 4, that is, a cross section including the axis 23 of the handle end (a plane including the straight line AYC in FIG. 3). 5B is an end view of the end cap 4, and FIG. 5B is an end view of the tip 3 of the handle end 2. FIG. Only points different from FIG. 4 will be described. An alignment engaging main portion 44 is formed on the inner surface of the inner member 41 of the end cap 4, and when mounted, the alignment engaging secondary portion 34 formed on the outer surface of the tip portion 3 of the handle end portion 2 and the alignment engaging sub portion 34 are formed. engage. In this embodiment, the alignment engagement main portion 44 is a ridge and the alignment engagement minor portion 34 is a concave groove, but in another embodiment, the alignment engagement main portion 44 is a concave groove. , the alignment engagement follower 34 may be configured as a ridge. In addition, the inner member 41 is provided with one or more through holes 40 , and the outer member 47 penetrates the through holes 40 and protrudes into the inner member 41 in a columnar shape. The through-holes 40 are used to inject liquid resin when forming the outer member 47 on the outer side of the inner member 41 by two-color injection molding, as will be described later.
In this embodiment, the inner surface of the tip portion 3 is connected to the inner surface of the handle end wall 25 without a step from the viewpoint of the ease of integral molding. In other embodiments, both inner surfaces may be connected in a stepped fashion.

FIG. 6A shows an engagement portion between the end cap 4 and the tip 3 of the handle end 2 in a cleaning tool according to another embodiment of the present invention, in which the cross-sectional shape of the handle end outer surface 26 is substantially square. 6B is an end view of the end cap viewed in a cross section perpendicular to the axis of the handle end 2, and FIG. 6B is an end view of the tip of the handle end. Content overlapping with that in FIG. 3 will not be repeatedly described, or the description will be simplified.
The inner surface of the inner member 41 of the end cap 4 is formed with an engaging main portion 42 that is one or more engaging projections and an engaging main portion 42 that is one or more engaging recesses. Further, on the outer surface of the distal end portion 3 of the handle end portion 2, there are formed an engaging slave portion 32 which is one or more engaging concave portions and an engaging slave portion 32 which is one or more engaging convex portions. . In this embodiment, the alignment engagement main portion and the alignment engagement slave portion are not provided, but the alignment engagement main portion 44 and the alignment engagement slave portion 34 are provided in the inner member 41 and the distal end portion 3. Configurations are also possible.

FIG. 7A is an end view of the end cap 4 viewed from a cross section including the axis 23 of the handle end in FIG. ) is also an end view of the handle end 2. FIG. Content overlapping with that of FIG. 5 will not be repeatedly described, or the description will be simplified.
When mounted, the inner member 41 of the end cap 4 is arranged to cover the distal end portion 3 of the handle end portion 2 from the outside, and the main engagement portion 42 and the secondary engagement portion 32 are engaged with each other, whereby the end cap 4 is mounted. is rigidly connected with the handle end 2 . At this time, the end cap end face 49 abuts on the handle end face 21, the outer member outer surface 46 of the end cap 4 and the handle end outer surface 26 are connected without a step in appearance, and the engagement main portion 42 and the engagement follower portion are connected. The engaging portion comprising portion 32 is no longer visible or accessible from the outside. Although not shown in FIG. 7B, a tip ventilation hole 33 penetrating through the tip 3 may be provided at the bottom of the tip 3 . By providing the tip ventilation hole 33, it is possible to prevent the mounting from being hindered due to an increase in internal pressure during mounting.

FIG. 8A shows yet another embodiment of the cleaning tool 1 of the present invention, in which the end cap 4 is inserted inside and engages the handle end wall 25 of the handle end 2 . FIG. 8B is an end view of the end cap 4 as seen in a cross section including the axis 23, and FIG. 8B is an end view of the handle end 2 as well. In this embodiment, the cross-sectional shapes of the outer member outer surface 46 and the handle end outer surface 26 are generally triangular or generally square or generally polygonal.
In the end cap 4 in which the outer member 47 and the inner member 41 are integrally formed, the inner member 41 made of a hard member extends downward from the end cap end face 49 and is tubular or made up of one or more tongues. , end cap extensions 45 . In this embodiment, the rigid handle end 2 does not have a reduced diameter tip 3 . Instead, the end cap extension 45 has an engaging main portion 42 on its outer surface. The engaging main portion 42 is an engaging convex portion, an engaging concave portion, or an engaging groove portion. The handle end wall 25 has an engagement slave 32 on its inner surface. The engagement slave portion 32 is an engagement concave portion, an engagement groove portion, or an engagement convex portion.
At the time of insertion, the end cap extension 45 slides into the handle end wall 25 of the handle end 2 and engages the main engaging portion 42 with the secondary engaging portion 32 to thereby close the end. A cap 4 is rigidly connected to the handle end 2 . At this time, the end cap end face 49 abuts on the handle end face 21, the outer member outer surface 46 of the end cap 4 and the handle end outer surface 26 are connected without a step in appearance, and the engagement main portion 42 and the engagement follower portion are connected. The engaging portion comprising portion 32 is no longer visible or accessible from the outside. The end cap extending portion 45 is provided with an inclined surface at its tip portion. The ramp serves as a guide so that the end cap extension 45 can be easily slid inside the handle end wall 25 during installation.

The end cap extension 45 protrudes downward from the end cap end surface 49 . The length H' of the end cap extension is the height from the lowest point of the end cap extension 45 to the highest point of the end cap end surface 49, where the height is measured in the direction along the axis 48 of the end cap. It is about. From the viewpoint of ensuring the strength and space of the engaging portion, the ratio H'/R of the length H' of the end cap extending portion and the distance R between the axial engaging portions depends on the material of the end cap extending portion 45 and the like. is generally 0.1 or more, more preferably 0.2 or more, and even more preferably 0.3 or more. The above evaluation of the ratio H'/R is effective not only when the cross-sectional shapes of the outer member outer surface 46 and the handle end outer surface 26 are substantially triangular, but also when they are substantially quadrangular or generally polygonal. is.

In the present embodiment, the height K′ of the inner member viewed from the main engaging portion 42 of the end cap extending portion 45 is defined as the height measured along the axial center 48 of the end cap. It is the height from the lowest point of the portion 42 to the highest point of the inner member 41 . By reducing the height K' of the inner member, the end cap 4 is prevented from being disengaged and detached from the handle end portion 2 due to deformation of the end cap 4 caused by a large external force acting on the end cap 4. 1. From the point of view of It is more preferably 2 or less. The above evaluation of the ratio K'/R is effective not only when the cross-sectional shapes of the outer member outer surface 46 and the handle end outer surface 26 are substantially triangular, but also when they are substantially quadrangular or generally polygonal. is.

When the end cap extension 45 is cylindrical, an end cap extension ventilation hole 43 passing through the end cap extension 45 may be provided at the top of the end cap extension 45 . In that case, the end cap extension vent 43 functions as a vent, so that when the end cap 4 is attached to the handle end 2, the inner upper surface and the upper inner surface of the inner member 41 and the cylindrical end cap extension vent. It is possible to prevent the internal pressure of the air existing in the space surrounded by 45 and the handle end wall 25 from increasing, and to prevent the mounting from being hindered due to the increase in the pressure of the air. The inner surface of the end cap extension vent 43 is preferably continuous with or flush with the end cap end surface 49 . With this configuration, when the end cap 4 is attached to the handle end portion 2, ventilation between the enclosed space and the outside air is ensured until just before the end cap end face 49 and the handle end end face 21 come into contact. Therefore, the pressure of the air in the enclosed space can be maintained at substantially atmospheric pressure, and it is possible to prevent the installation from being hindered due to the increased pressure of the air in the enclosed space.

In the embodiment of the invention shown in FIGS. 1-7, the cross-sectional shape of the outer member outer surface 46 and the handle end outer surface 26 when viewed in a cross section perpendicular to the handle end axis 23 is substantially m-square. Assuming that the cross-sectional shape of the inner surface of the inner member 41 of the end cap 4 and the outer surface of the handle tip portion 3 is approximately n-sided, integers m and n have the same value. However, in other embodiments of the invention the integers m and n may be different. For example, m=6 and n=3. Also, when m=∞, the cross-sectional shape of the outer member outer surface 46 and the handle end outer surface 26 is substantially circular or substantially elliptical, which is also included in the embodiments of the present invention.
Under an external force, the end cap 4 rotates relative to the handle end 2 about the handle end axis 23, disengaging the inner member 41 and the tip 3 and allowing the end cap 4 to rotate against the handle. From the viewpoint of preventing detachment from the end portion 2, n is preferably small, preferably n=3 or 4, more preferably n=3. In addition, from the viewpoint of ensuring strength and facilitating manufacturing while suppressing the material amount of the inner member 41 and the tip portion 3, it is preferable that m and n have a common divisor, and m is more preferably a multiple of n. Preferably, m=n is most preferred.

In the embodiment of the present invention shown in FIG. 8, the cross-sectional shape of the outer member outer surface 46 and the handle end outer surface 26 when viewed in a cross section perpendicular to the handle end axis 23 is substantially m-square, and the end Assuming that the cross-sectional shape of the outer surface of the cap extension portion 45 and the inner surface of the handle end portion 2 is substantially n-sided, the integers m and n have the same value. However, in other embodiments of the invention the integers m and n may be different. For example, m=6 and n=3. Under an external force, the end cap 4 rotates relative to the handle end 2 about the handle end axis 23 to disengage the end cap extension 45 and the inner surface of the handle end 2 . From the viewpoint of preventing the end cap 4 from coming off from the handle end portion 2, n is preferably small, more preferably n=3 or 4, and most preferably n=3. In addition, from the viewpoint of ensuring strength and facilitating manufacturing while suppressing the material amount of the inner member 41 and the tip portion 3, it is preferable that m and n have a common divisor, and m is more preferably a multiple of n. Preferably, m=n is most preferred.

FIG. 9 is an end view illustrating a step of forming the outer member 47 by injection molding in a method of manufacturing an end cap for a cleaning tool, which is one embodiment of the present invention. The advantage of the end cap manufacturing method of this embodiment is that the outer surface 46 of the outer member of the end cap 4 is formed smoothly, so that the user does not feel discomfort when gripping the handle end portion 2 of the cleaning tool. It should feel comfortable to hold.
An inner mold first piece 62 and an inner mold second piece 63 facing each other across a resin injection path 65 that is a gap hold the inner member 41 . A through hole 40 is provided in advance in the inner member 41 . An outer frame mold 61 is arranged outside the inner mold member 41 , and the inner frame mold first piece 62 , the inner frame mold second piece 63 and the outer frame mold 61 form an outer member forming gap 64 . Surrounding When the liquid resin is injected from the resin injection path 65 , the liquid resin flows in the direction indicated by the arrow 66 and fills the outer member forming gap 64 . After the liquid resin filled in the outer member forming cavity 64 is cured to form the outer member 47, the inner frame mold first piece 62, the inner frame mold second piece 3, and the outer frame mold 61 are separated. By doing so, the end cap 4 of the present invention in which the inner member 41 and the outer member 47 are integrated can be manufactured.
In one embodiment of the present invention, inner mold first piece 62 and inner mold second piece 63 hold inner member 41 in engagement. In that case, an inner frame mold engagement receiving portion 67 is provided on the inner mold first piece 62 and the inner mold second piece 63 , and the inner frame mold engagement receiving portion 67 and the inner member 41 are engaged. The inner member 41 is held by engagement due to the engagement with the joint portion 42 . A secondary engaging portion is provided on the inner member 41 separately from the engaging main portion 42, and the inner member 41 is engaged with the inner member 41 by engaging the secondary engaging portion with the inner frame mold engagement receiving portion 67. may be retained. Furthermore, although this embodiment uses the method of engagement for retention, in one modified embodiment of this embodiment, the inner mold first piece 62 and the inner mold second piece 63 are inner members. 41 can be held by an arbitrary method such as clamping, negative pressure suction holding, screw holding, adhesion holding, fusion holding, crimping holding, hanging, and insertion holding.
From the outer member 47 formed by the above-described method, the liquid resin hardened in the resin injection passage 65 protrudes like a rod through the through hole 40 of the inner member 41 . This rod-shaped hardened material constituting a part of the outer member 47 may be used as the end cap 4 as it is, or may be used as the end cap 4 after being cut to an appropriate length. In the present embodiment, the resin injection path 65 for forming the outer member is provided inside the outer member 47 rather than outside the outer member 47, so that the cured liquid resin cured in the resin injection path 65 , the cut surface does not appear on the outer surface side of the outer member 47 and is not visible to the user of the cleaning tool. There is an advantage that even when a person grips the end cap 4 portion when holding the cleaning tool 1, it is difficult for the person to feel a sense of incongruity.

The present invention is not limited to the above embodiments, but includes various modifications, design changes, other embodiments, etc. within the technical scope of the present invention without departing from the technical idea of the present invention. Not even.

Cleaning tools with end caps are widely used as means for cleaning in homes, businesses, and the like. The present invention solves the problem of the prior art that the end cap tends to come off from the handle when an external force is applied, and the end cap is difficult to grip. This is solved by a simple method of making the engaging portion inaccessible from the outside. INDUSTRIAL APPLICABILITY The present invention provides an easy-to-use, hard-to-break cleaning tool with an end cap, and an excellent manufacturing method thereof, and thus has the potential to be widely used in the cleaning tool sales and rental industries.

1 cleaning tool with end cap 2 handle end 3 tip 4 end cap 11 handle 12 handle other end 13 handle body 14 grip 15 wiping body gripping part 16 wiping body 21 handle end face 22 (of handle end face) 23 Handle end axis 24 Handle end hollow 25 Handle end wall 26 Handle end outer surface 31 Tip end face 32 Engagement follower 33 Tip air hole 34 Alignment engagement follower H Tip length R Distance between axial engagement portions 40 Through hole (provided in inner member) 41 Inner member (of end cap) 42 Main engagement portion 43 End cap extension air hole 44 Alignment engagement main portion Section 45 End Cap Extension 46 Outer Member Outer Surface 47 Outer Member (of End Cap) 48 End Cap Axis 49 End Cap End Face H' Length of End Cap Extension K Height of Inner Member K' (End Cap Extension) Height of the inner member (as seen from the engaging main portion of the part) L Maximum radius of the outer surface 51 Axial direction of the handle 52 Vertical line θ Leaning angle 61 Outer frame mold 62 Inner frame mold first piece 63 Inner frame mold Second piece 64 Space for outer member formation 65 Resin injection path 66 Arrow (indicating flow of liquid resin) 67 Inner frame mold engagement receiving portion

Claims (9)

A cleaning tool having a handle,
A double-structured end cap formed by integrating an inner member and an outer member arranged to cover the outer surface of the inner member is attached to the handle end of the handle,
both the inner member and the handle end are made of a rigid member;
the outer member is made of a soft member,
The tip of the handle end is cylindrical with a reduced diameter,
The inner member has an engaging main portion on its inner surface, and the tip portion has an engaging secondary portion on its outer surface,
The end cap is attached to the end of the handle by the inner member covering the entire distal end from the outside and the main engagement portion and the secondary engagement portion being engaged ,
It is the maximum value of the distance R between the shaft center engagement portions, which is the distance from the shaft center of the handle end portion to the engagement slave portion, and the distance from the shaft center of the end cap to the outer member outer surface of the outer member. A cleaning tool, wherein the ratio R/L to the outer surface maximum radius L is 0.5 or more and 0.9 or less . 2. The cleaning tool of claim 1, wherein the distal end of said handle end is a reduced diameter tubular shape having a substantially triangular cross section . the tip of the handle end has a cylindrical shape with a reduced diameter and a substantially triangular or substantially quadrangular cross section;
2. The cleaning tool according to claim 1, wherein a tip end surface is provided at the tip of the tip portion, and the tip end surface is an outwardly inclined surface. the diameter-reduced distal end portion of the handle end portion projects upward from the end surface of the handle end portion of the handle end portion;
the bottom portion of the end cap is an end cap end surface,
The end cap end face comprises both an end face of the inner member and an end face of the outer member, and both the end face of the inner member and the end face of the outer member, when installed, are aligned with the handle end.
The cleaning tool according to any one of claims 1 to 3, which abuts on the end surface over the entire circumference. A tip ventilation hole penetrating through the tip is provided at the lowest part of the tip, and the inner bottom surface of the tip ventilation hole is continuous with the end surface of the handle end or is at the same height. Item 4. The cleaning tool according to item 4. The cleaning tool according to any one of claims 1 to 5 , wherein the outer member outer surface of the outer member and the handle end outer surface of the handle end are connected without a step in appearance. The cross-sectional shape of the outer member outer surface of the outer member when viewed in a cross section perpendicular to the axial direction of the handle end is at least substantially large when viewed in a cross section where the diameter of the curve representing the cross-sectional shape is maximum. The cleaning tool according to any one of claims 1 to 6 , which is rectangular. A method for manufacturing an end cap for a cleaning tool according to any one of claims 1 to 7,
forming the inner member by injection molding;
forming an outer member over the outer surface of the inner member;
A method of manufacturing an end cap characterized by comprising: A method for manufacturing an end cap for a cleaning tool according to any one of claims 1 to 7,
The inner member has a through hole,
holding the inner member;
arranging an outer frame mold outside the inner member with an outer member forming gap spaced therebetween;
injecting a liquid resin from the inside of the inner member through the through hole into the outer member forming cavity;
obtaining the outer member integrated with the inner member by curing the liquid resin to form the outer member, which is a cured product;
separating the outer mold from the outer member;
A method of manufacturing an end cap for a cleaner, comprising at least:

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