JP2014144154A - Rotary handle of handrail for bathtub - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary handle of a handrail for a bathtub in which a knob part fits the size and shape of a hand of a wide range of an operator, and which can be surely and strongly gripped without giving oppressive feeling and stress locally in the hand of the operator.SOLUTION: A handle 1 includes a knob part 2 which is mounted on an outer periphery of a shaft member 4 and which is rotated by a hand of an operator. The knob part 2 includes: a plurality of substantially hemispherical-shaped protrusions 21 which protrude outward in a radial direction of the shaft member 4; a plurality of recesses 22 which are recessed inward in the radial direction of the shaft member 4; and a bulging part 23 which protrudes outward in an axial direction of the shaft member 4 in such a manner that it comes in pressure-contact with a palm of the operator when the operator grips the knob part 2. The protrusions 21 and the recesses 22 are arranged alternately in the peripheral direction of the shaft member 4 on an outer peripheral part 10 of the knob part 2, and outer peripheral surfaces 211 of the protrusions 21 and outer peripheral surfaces 221 of the recesses 22 are formed by a curved surface continuing with each other.

Description

  The present invention relates to a handrail for a bathtub provided with a knob portion that is mounted on the outer periphery of the shaft member and rotated by an operator's hand in order to advance and retreat a pressing plate connected to the shaft member on which a screw portion is formed. Related to the rotation handle. In particular, the knob is suitable for a wide range of operator sizes and shapes, and the operator does not feel local pressure or stress in the operator's hand, so the operator can grip the knob with a strong force. The present invention relates to a rotary handle that can transmit torque to a knob portion without difficulty.

  Conventionally, a handrail for a bathtub that has a grip and can be attached to the side wall of the bathtub so as to be detachable can be easily attached to and removed from the bathtub by supporting the body of an elderly person or a disabled person. It is commercially available. This type of handrail for bathtubs is usually provided with a pressing plate for strongly clamping the side wall of the bathtub. In many cases, the clamp of the bathtub side wall and the release of the clamp by the pressing plate are realized by screwing and retracting the shaft member connected to the pressing plate. Therefore, in the case of the above-mentioned type of handrail for bathtubs, the pressing plate must be firmly and securely clamped to the side wall of the bathtub by rotating the shaft member or the nut member screwed with the shaft member with the rotary handle. I must.

  However, in the above-mentioned type of handrail for bathtubs, the rotation handle for moving the pressing plate is focused only on the basic function of being “rotated” by a human hand, and a wide range of unspecified operator's hands. However, no consideration has been given to adapting to the size and shape of the camera, and to creating a gentle shape and structure that does not cause stress to the hand of the operator. For this reason, in the conventional handrail for bathtubs, when the operator tries to rotate the rotary handle for moving the pressing plate back and forth with a strong force, the knob portion easily slides in the operator's hand or the knob portion slips. Stop projections locally press the inside of the operator's hand to cause pain and stress, so the operator grips the rotating handle with a strong force and transmits the rotating force to the rotating handle without difficulty. There was a problem that I could not.

  Moreover, as a handle | steering-wheel which transmits rotational force to specific components other than the handrail for bathtubs, it describes in Unexamined-Japanese-Patent No. 2009-299855 (patent document 1) and design registration 1444492 (patent document 2). Such general-purpose rotary handles are described in Japanese Patent Application Laid-Open No. 2006-129864 (Patent Document 3), Japanese Patent Application Laid-Open No. 2011-229458 (Patent Document 4), and Japanese Patent Application Laid-Open No. 2004-236515 (Patent Document 5). Such a fishing reel rotating handle and a faucet rotating handle as described in Design Registration No. 1172177 (Patent Document 6) are known.

  However, the rotating handles described in Patent Documents 1, 2, and 6 are formed with sharp convex portions and corner portions for locking fingers of the hand on the outer peripheral surface of the knob portion. For an operator with a large hand that has to hold the handle in the so-called heel grip state, when the rotary handle is gripped with a strong force, the convex part or corner part of the knob part locally presses the palm. Since pain and stress are caused on the palm of the hand, there is a problem that the operator cannot transmit the rotational force to the rotary handle with a sufficient force.

  The rotary handles described in Patent Documents 3, 4 and 5 are rotary handles for fishing reels that rotate by revolving a knob connected to a crank-shaped arm member around the reel shaft. Designed to generate power. For this reason, in the rotary handle described in Patent Documents 3, 4 and 5, the knob section main body can be swung at high speed by a small revolving motion of the arm and wrist while the operator fixes the direction of the wrist. Has a relatively small shape so that it can be picked only by a finger, and the surface of the knob portion main body is also formed of a smooth curved surface with almost no irregularities.

  For this reason, when the rotary handle described in Patent Documents 3, 4 and 5 is applied to the rotary handle of the handrail for bathtubs for reciprocating the shaft member, the knob portion may slip in the operator's hand. Or, when the operator's hand is large, there is a problem that the knob body cannot be twisted with the wrist and the rotary handle cannot be rotated sufficiently. This is because the rotary handle of the handrail for bathtubs has to rotate the knob part itself directly by twisting the wrist.

JP 2009-299855 A Design Registration No. 14444792 JP 2006-129864 A JP 2011-229458 A JP 2004-236515 A Design Registration No. 1172177

  Accordingly, the present invention provides a rotary handle for a handrail for a bathtub for screwing and retracting a shaft member, the knob portion being adapted to a wide range of operator sizes and shapes, and locally in the operator's hand. An object of the present invention is to provide a rotary handle that can be firmly and securely gripped without feeling almost a feeling of pressure or stress.

  The present inventors have earnestly studied the size and shape of the knob portion attached to the outer periphery of the shaft member, the shape and arrangement of the uneven portions on the surface, etc. in the rotary handle of the handrail for bathtubs for screwing the shaft member back and forth. As a result of repeated studies, the hand handle is standard in size by providing a concavo-convex part with a special shape in the circumferential direction of the knob part of the rotary handle and a bulging part that presses the palm in the axial direction. For the operator, the bulging part supports the vicinity of the center of the palm of the hand, and the concavo-convex part locks the finger of the hand. The above problem was solved by making the palm and the base of the finger strongly slip without causing a feeling of local pressure or stress inside.

  Specifically, according to the present invention, a knob portion that is mounted on the outer periphery of the shaft member and rotated by the operator's hand in order to advance and retract the shaft member connected to the pressing plate of the handrail for the bathtub. The knob includes a plurality of substantially hemispherical convex portions that are convex outward in the radial direction of the shaft member, and a plurality of concave portions that are concave inward in the radial direction of the shaft member. And when the operator grips the knob part, it is provided with a bulging part that protrudes outward in the axial direction of the shaft member so as to press-contact the palm of the operator. The handrail for a bathtub is characterized in that the outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are alternately formed on the outer peripheral portion of the shaft portion in the circumferential direction of the shaft member. A rotating handle is provided.

  In other words, according to the present invention, the end portion of the knob portion where the bulging portion is formed is pressed by the palm of the operator's palm, and the outer peripheral portion of the knob portion where the concave portion and the convex portion are formed is pressed by the operator's finger. There is provided a rotary handle for a handrail for a bathtub designed on the assumption that it is gripped by a so-called heel gripping state.

  The rotary handle according to the present invention may be directly attached to the shaft member or indirectly attached to the shaft member as long as it is attached to the outer periphery of the shaft member.

  For example, when the shaft member has a threaded portion formed on the outer peripheral portion and is screwed with a nut, if the rotary handle is directly attached to the shaft member, the shaft member itself is attached to the rotary handle. If the rotary handle is attached to the nut and is indirectly attached to the shaft member, the shaft member can be rotated by rotating the nut itself with the rotary handle. Can be screwed back and forth.

  In the present invention, a plurality of substantially hemispherical convex portions and a plurality of concave portions are alternately arranged on the outer peripheral portion of the knob portion, and the outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are formed by continuous curved surfaces, When an operator with a standard hand size grips the rotary handle of the present invention, the fingers of the hand are brought into close contact with the outer peripheral surface of the concave portion and the convex portion, and the gap between the convex portion and the convex portion is ensured. It can be locked. In particular, the convex part of the knob part and the outer peripheral surface of the concave part are constituted by a continuous curved surface, and the convex part has a substantially hemispherical shape, so that the fingers of the hand are arranged obliquely between the convex part and the convex part Even in this case, the finger of the hand can be brought into close contact with the convex portion and the concave portion without difficulty and can be reliably locked.

  It should be noted that the “continuous curved surface” used in the present specification includes a curved surface that partially includes a flat surface, and in a strict sense, not all surfaces need to be configured by curved surfaces. That is, as used in this specification, “continuous curved surface” means a combination of a curved surface and a curved surface, in which the surfaces are smoothly connected to each other without causing corners or steps, or a curved surface. It means a combination with a plane.

  On the other hand, when an operator with a large hand grips the rotary handle of the present invention, the vicinity of the base of the finger or the palm of the hand is mainly crimped to the convex part of the knob part. And it can function as a powerful anti-slip near the base of the finger. In the present invention, the convex portion of the knob portion has a substantially hemispherical shape and the outer peripheral surface of the convex portion and the concave portion is formed by a continuous curved surface, so that the convex portion and the concave portion are locally located near the palm or the base of the finger. There is no pressure and no pain or stress is felt in the operator's hand even when the operator grips the rotating handle with a strong force. For this reason, the operator can grip the rotary handle with a strong force, and can easily transmit the rotation of the wrist to the knob portion.

  Further, in the present invention, by providing an outwardly convex bulging portion at the end of the knob portion, when the operator grips the rotary handle of the present invention, the bulging portion is near the center of the palm. Since the palm can be supported by pressing, the operator can easily twist the wrist with the bulging portion as a fulcrum, and the rotation of the wrist can be transmitted to the knob portion without difficulty. In particular, when the bulging part is formed by a curved surface that protrudes outward in the axial direction of the shaft member, the area from the base of the finger to the vicinity of the center of the palm can be closely adhered to the end of the knob part without a gap. Even when the wrist is rotated with a strong force, the powerful rotational force of the wrist can be transmitted to the knob portion without waste. Since the bulge portion of the knob portion is pressed by the operator near the center of the palm when the rotary handle is gripped, the above-described effects can be achieved regardless of the size of the operator's hand. Note that the axially outward direction of the shaft member means the side or region where the shaft of the shaft member extends beyond the end of the shaft member.

  In the rotary handle of the present invention, it is preferable that five or six convex portions and six concave portions of the knob portion are respectively arranged.

  When five or more convex portions and concave portions are arranged on the outer peripheral portion of the knob portion, each finger of the hand can be placed between the separate convex portion and the convex portion or on the concave portion. In addition, the finger can be more firmly locked by the concave portion. Further, when six convex portions and six concave portions are arranged on the outer peripheral portion of the knob portion, when the finger of the hand is in a so-called heel gripping state, there is one between the thumb and the little finger where the gap between the fingers is widest. Since the idle concave portion can be arranged, each finger of the hand can be easily fitted to the convex portion and the concave portion, and as a result, the operability of the rotary handle is further improved.

  In the rotary handle of the present invention, it is preferable that the bottommost portion of the outer peripheral surface of the recess is arranged at an equal distance from the axis of the shaft member. Moreover, it is preferable that the topmost part of the outer peripheral surface of a convex part is also arrange | positioned equidistantly from the axis | shaft of a shaft member, respectively.

  When the bottom of the outer peripheral surface of the recess is arranged at an equal distance from the axis of the shaft member, the placement of the recess approximates the arrangement of each finger when the operator places the knob portion in a so-called gripping state. The fit and adhesion when a finger is placed on the recess are further improved. In addition, there is an advantage that the allowable range of the hand of a suitable operator is widened.

  When the topmost part of the outer peripheral surface of the convex part is arranged at an equal distance from the axis of the shaft member, the convex part is arranged at the base of each finger when an operator with a large hand places the knob part in a so-called gripping state. Therefore, the fit and adhesion when the base of the finger or the palm is placed on the convex portion are further improved. In addition, even in an operator having a relatively large hand size, there is an advantage that the allowable range of the hand to be expanded is widened.

  As used herein, the “distance from the shaft member axis to the bottom of the outer peripheral surface of the recess” refers to the perpendicular when the vertical line is drawn from the bottom of the outer peripheral surface of the recess to the shaft member axis. It means the length and substantially means the shortest distance from the axis of the shaft member to the recess. The “distance from the axis of the shaft member to the top of the outer peripheral surface of the convex portion” means the length of the perpendicular when the vertical line is drawn from the top of the outer peripheral surface of the convex portion to the axis of the shaft member. This means the shortest distance from the axis of the shaft member to the convex portion. Further, the shaft member has a concept that includes not only the shaft inside the shaft member but also the shaft outside the shaft member extended coaxially.

  In the rotary handle of the present invention, it is preferable that the convex portions are arranged at equal intervals in the circumferential direction of the shaft member. Moreover, it is preferable that the concave portions are also arranged at equal intervals in the circumferential direction of the shaft member.

  When the convex portions and / or the concave portions are arranged at equal intervals in the respective circumferential directions, the arrangement of the convex portions and / or the concave portions approximates the arrangement of each finger when the operator puts the knob portion in a so-called gripping state. Since each finger of the operator can be placed at an equal interval between the convex part and the convex part or on the concave part, the finger is placed between the convex part and the convex part or on the concave part. The fit, holdability and adhesion at the time are further improved. There is also an advantage that the operator does not need to change the grip position in accordance with the position of the convex part and / or the concave part of the knob part. In addition, when an operator with a large hand grips the rotating handle, the evenly arranged projections press the base of the finger or the palm evenly, so there is no friction between the hand and the knob. As a result, it is possible to effectively prevent the hand from slipping when the operator rotates the rotary handle.

  In the rotary handle of the present invention, it is preferable that the convex portions have the same shape. Moreover, it is preferable that each recessed part also has the same shape.

  When the convex part and / or the concave part have the same shape, the operator can place the finger, the base of the finger or the palm on the outer peripheral surface of the convex part and / or the concave part without selecting the position of the convex part and / or the concave part. It is possible to make it closely contact with each other and to be locked on the outer peripheral surface of the knob portion without stress. In addition, since the outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are formed by a continuous curved surface, even when the operator holds the rotary handle without selecting the position of the convex portion and / or the concave portion, the pressing received from the knob portion is performed. The pressure is distributed and there is no local pain or stress in the operator's hands. In addition, since the appearance can be a regular curved surface with a uniform shape, it is possible to provide a human-friendly rotating handle that is beautiful in appearance.

  The rotary handle of the present invention preferably further includes a cylindrical portion that is coaxially connected to the knob portion and is attached to the outer periphery of the shaft member.

  The rotary handle of the present invention is designed on the assumption that the operator's palm is pressed against the bulging portion of the knob portion, and the operator's finger is placed on the outer periphery of the knob portion so-called gripping state. The length of the outer peripheral part of the knob part along the axial direction of the member is relatively short. Therefore, if the cylindrical portion is further connected to the knob portion on the same axis, the rotary handle can be firmly attached to the outer periphery of the shaft member without loosening, and in particular, it effectively prevents the knob portion from swinging around the rotary shaft. be able to.

Rotation handle of the present invention, the shortest distance along the outer circumferential surface of the knob portion from the bottommost portion of the outer peripheral surface of the concave portion to the center portion of the bulged portion: and A _1, from the lowest portion of the outer peripheral surface of the concave portion of the shaft member axis The shortest distance to: D preferably satisfies the relationship D ≦ A ₁ ≦ 56 mm.

Since the rotary handle of the present invention includes a bulging portion that protrudes outward at the end of the knob portion, the shortest distance along the outer peripheral surface of the knob portion from the concave portion to the center of the bulging portion : A ₁ is the shortest distance from the recess to the axis of the shaft member: a length of D or more is required. When A ₁ ≧ D, the operator can tightly contact the palm and fingers along the end and outer periphery of the knob without any gaps, so that the rotational force of the wrist is reliably transmitted to the knob. be able to.

Moreover, based on “Japanese anthropometric data 1992-1994” (published by the Human Life Engineering Research Center), the minimum length of the middle finger (third finger) for adult men and women is 56.3 mm for women. On the other hand, the average value of the middle finger (third finger) length of adult men and women is 76.5 mm. Therefore, by setting the shortest distance: A ₁ to a length of 56 mm or less, most adult males and females have their middle finger (third finger) and other fingers opposite the bulging part from the bulging part of the knob part beyond the concave part. Since the knob portion can be gripped by extending to the side, the rotary handle can be easily and firmly gripped with a strong force.

Rotation handle of the present invention, the shortest distance along the outer circumferential surface of the knob portion from the concave portion to the center portion of the bulged portion: and A _1, to the lowest bottom portion of the outer peripheral surface of the concave portion from the connecting portion of the knob portion and the cylindrical portion It is preferable that the shortest distance along the outer peripheral surface of the knob part: A ₂ and the total distance A ₁ + A ₂ satisfy 56 mm ≦ A ₁ + A ₂ ≦ 98 mm.

Based on "Japanese anthropometric data 1992-1994" (published by the Human Life Engineering Research Center), the minimum length of the middle finger (third finger) for adult men and women is 56.3 mm for women. On the other hand, the maximum value is 98.4 mm for men. Therefore, the shortest distance along the outer peripheral surface of the knob portion from the concave portion to the center portion of the bulging portion: A ₁ and the shortest distance along the outer peripheral surface of the knob portion from the connecting portion of the knob portion and the cylindrical portion to the concave portion: by the sum _(a 1 + _{a 2)} the 56mm and not more than 98mm or less in length and a _2, the shortest distance from the bulged portion of the knob portion to the connecting portion between the cylindrical portion beyond the recess _(a 1 + a ₂ ) can be adapted to the length of the middle finger (third finger) of adult men and women of a wide range of ages. Further, since the adhesion of the middle finger (third finger) and other fingers to the knob portion is improved, the operator can easily and firmly hold the rotary handle with a strong force.

The “shortest” in the shortest distance: A ₁ and the shortest distance: A ₂ is a knob portion that passes through the bottom of the outer peripheral surface of the recess and the axis of the shaft member and appears in a cross section parallel to the axis of the shaft member. The shortest distance from the above-mentioned recess to the shaft of the shaft member: “the shortest” in D means that the perpendicular is lowered from the bottom of the outer peripheral surface of the recess to the shaft of the shaft member. Means that the length of that perpendicular. Further, the shaft member has a concept that includes not only the shaft inside the shaft member but also the shaft outside the shaft member extended coaxially.

  In the present invention, a plurality of substantially hemispherical convex portions and a plurality of concave portions are alternately arranged on the outer peripheral portion of the knob portion, and the outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are formed by continuous curved surfaces, When an operator with a standard hand size grips the rotary handle of the present invention, the fingers of the hand are brought into close contact with the outer peripheral surface of the concave portion and the convex portion, and the gap between the convex portion and the convex portion is ensured. It can be locked. In addition, since the convex portion has a substantially hemispherical shape, even when the finger of the hand is arranged in an oblique direction between the convex portion and the convex portion, the finger of the hand is brought into close contact with the convex portion and the concave portion without difficulty. Can be locked.

  In the present invention, when an operator with a large hand grips the rotary handle of the present invention, the vicinity of the base of the finger or the palm of the hand is mainly crimped to the convex part of the knob part. It can function as a powerful anti-slip near the palm of your hand or the base of your finger.

  Further, in the present invention, by providing an outwardly convex bulging portion at the end of the knob portion, when the operator grips the rotary handle of the present invention, the bulging portion is near the center of the palm. Since the palm can be supported by pressing, the operator can easily twist the wrist with the bulging portion as a fulcrum, and the rotation of the wrist can be transmitted to the knob portion without difficulty.

  In the present invention, by placing five or six convex portions and concave portions on the outer peripheral portion of the knob portion, each finger of the hand is placed between the separate convex portion and the convex portion or on the concave portion, respectively. Therefore, the finger of the hand can be more firmly locked by the convex portion and the concave portion, and each finger can be fit into the convex portion and the concave portion without difficulty.

  In the present invention, the bottom of the outer peripheral surface of the concave portion and / or the top of the outer peripheral surface of the convex portion are arranged at equal distances from the axis of the shaft member, respectively, so that the finger or finger of the hand is placed on the concave portion or the convex portion. When the base or palm is placed, the fit and adhesion are further improved, and the allowable range of the operator's hand can be expanded.

  In the present invention, by arranging the convex portions and / or concave portions at equal intervals in the respective circumferential directions, fit property and holdability when a finger is placed between the convex portions and the convex portions or on the concave portions, The adhesion is further improved, and the operator does not have to change the grip position in accordance with the position of the convex part and / or the concave part of the knob part.

  In the present invention, by making the convex portion and / or the concave portion have the same shape, the operator can place the convex portion and / or the finger of the hand, the base of the finger or the palm without selecting the position of the convex portion and / or the concave portion. It can be brought into close contact with the outer peripheral surface of the recess without any gap, and can be locked onto the outer peripheral surface of the knob portion without stress. In addition, since the appearance can be a regular curved surface with a uniform shape, it is possible to provide a human-friendly rotating handle that is beautiful in appearance.

  In the present invention, if the cylindrical portion is further connected to the knob portion on the same axis, the rotary handle can be firmly attached to the outer periphery of the shaft member without loosening. Can be prevented.

In the present invention, the shortest distance along the outer circumferential surface of the knob portion from the concave portion to the center portion of the bulged portion: the shortest distance from A ₁ and the recess to the axis of the shaft member: and D, the D ≦ A ₁ ≦ 56 mm By setting the length to satisfy the relationship, the operator can closely contact the palm and fingers of the palm along the end and outer periphery of the knob without any gaps, so that the rotational force of the wrist is reliably transmitted to the knob. In addition, most adult men and women can grab the middle finger (third finger) from the bulging part of the knob part to the opposite side of the bulging part by extending it from the bulging part of the knob part. It can be firmly held with a strong force.

In the present invention, the shortest distance: A ₁ and the shortest distance along the outer circumferential surface of the knob portion from the connecting portion of the knob portion and the cylindrical portion to the lowest portion of the outer peripheral surface of the recess: the sum of the A ₂ (A 1 ₊ A ₂ ) 56 mm ≦ A ₁ + A ₂ ≦ 98 mm, the minimum distance (A ₁ + A ₂ ) from the bulging part of the knob part to the connecting part with the cylindrical part is widened for adult men and women of a wide age group It can be adapted to the length of the middle finger (third finger) and the adhesion of the middle finger (third finger) to the knob is improved, so the operator can easily and firmly hold the rotary handle with a strong force. can do.

It is a perspective view of the rotary handle of the handrail for bathtubs of this invention. It is a front view of the rotary handle of the handrail for bathtubs of this invention. It is a side view of the rotary handle of the handrail for bathtubs of this invention. It is AA sectional drawing of the rotary handle shown by FIG. 2 which showed the holding state by hand. It is BB sectional drawing of the rotary handle shown by FIG. 2 which showed the holding state by hand. FIG. 3 is an AA cross-sectional view of the rotary handle shown in FIG. 2.

  Hereinafter, a rotary handle of a handrail for bathtubs according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the examples shown below, and various modifications can be made without departing from the technical idea of the present invention.

  The main structure of the rotary handle 1 of the handrail for bathtubs which concerns on one Embodiment of this invention is demonstrated using FIGS. 1-3. FIG. 1 shows a perspective view of a rotary handle 1 of a handrail for a bathtub according to this embodiment as viewed obliquely from the front. 2 shows a front view of the rotary handle 1 of this embodiment, and FIG. 3 shows a side view of the rotary handle 1 of this embodiment.

  As can be understood with reference to FIGS. 1 to 3, the rotary handle 1 of this embodiment includes a knob portion 2 that is rotated by an operator's hand, and a cylindrical portion 3 that is coaxially connected to the knob portion 2. The shaft member 4 is attached to the outer periphery of the shaft member 4 in order to make the shaft member 4 connected to a pressing plate (not shown) of the handrail for the bathtub screw forward and backward.

  Although not shown, the shaft member 4 to which the rotary handle 1 of this embodiment is attached has a threaded portion formed on the outer periphery and is screwed to the nut. The rotary handle 1 of this embodiment is attached to the nut. The shaft member 4 can be screwed back and forth by rotating the nut itself by the rotary handle 1.

  The knob portion 2 includes a plurality of substantially hemispherical convex portions 21 that are convex outward in the radial direction of the shaft member 4, and a plurality of concave portions 22 that are concave inward in the radial direction of the shaft member 4. Then, when the operator grips the knob portion 2, a bulging portion 23 that protrudes outward in the axial direction of the shaft member 4 is provided so as to press-contact the palm of the operator. The convex portions 21 and the concave portions 22 are alternately arranged on the outer peripheral portion 10 of the knob portion 2 in the circumferential direction of the shaft member 4, and the outer peripheral surface 211 of the convex portion 21 and the outer peripheral surface 221 of the concave portion 22 are continuous with each other. It is formed by a curved surface.

  The “continuous curved surface” includes a curved surface that partially includes a flat surface, and it is not necessary that all surfaces are formed of curved surfaces in a strict sense. Therefore, in this embodiment, “continuous curved surface” means a combination of a curved surface and a curved surface, or a combination of a curved surface and a flat surface, in which the surfaces are smoothly connected to each other without causing a corner or a step. A plane may be included in a part of the outer peripheral surface 211 of the convex portion 21 and / or the outer peripheral surface 221 of the concave portion 22.

  FIG. 4 is a cross-sectional view taken along the line AA of the rotary handle 1 shown in FIG. 2 and shows a state where the rotary handle 1 is gripped by an operator having a standard hand 5 size. FIG. 5 is a cross-sectional view taken along the line BB of the rotary handle 1 shown in FIG. 2 and shows a state where the rotary handle 1 is gripped by an operator having a large hand 5 size.

  As shown in FIGS. 4 and 5, in the rotary handle 1 of this embodiment, the end portion 20 of the knob portion 2 where the bulging portion 23 is formed is pressed by the palm of the operator to form the concave portion 22 and the convex portion 21. The outer peripheral portion 10 of the knob portion 2 is designed on the assumption that the knob portion 2 is gripped by a so-called heel gripping state by an operator's finger.

  In the rotary handle 1 of the present embodiment, a plurality of substantially hemispherical convex portions 21 and a plurality of concave portions 22 are alternately arranged on the outer peripheral portion 10 of the knob portion 2, and the outer peripheral surface 211 of the convex portion 21 and the outer periphery of the concave portion 22 are arranged. Since the surface 221 is formed by curved surfaces that are continuous with each other, as shown in FIG. 4, when an operator with a standard hand size holds the rotary handle 1, each finger 51 of the hand protrudes from the recess 22. It is possible to closely contact the outer peripheral surfaces 211 and 221 of the portion 21 with no gap and to be surely locked between the convex portion 21 and the convex portion 21. In particular, the convex portion 21 of the knob portion and the outer peripheral surface 10 of the concave portion 22 are configured by a continuous curved surface, and the convex portion 21 has a substantially hemispherical shape, so that the finger of the hand is between the convex portion 21 and the convex portion 21. Even when it is disposed in an oblique direction, the fingers of the hand can be brought into close contact with the convex portion 21 and the concave portion 22 without difficulty and can be reliably locked.

  On the other hand, as shown in FIG. 5, when an operator with a large hand 5 grips the rotary handle 1 of this embodiment, the vicinity of the finger base 52 or the palm 53 is mainly crimped to the convex portion 21 of the knob portion 2. Therefore, the convex portion 21 can be made to function as a powerful slip stopper near the palm 53 and the finger base 52 when the knob portion 2 is rotated. In the present embodiment, in particular, the convex portion 21 of the knob portion 2 has a substantially hemispherical shape, and the outer peripheral surface 10 of the convex portion 21 and the concave portion 22 is constituted by a continuous curved surface. There is no local compression around the palm 53 or the base 52 of the finger, and even when the operator holds the rotary handle 1 with a strong force, no pain or stress is felt in the operator's hand 5. For this reason, the operator can hold the rotary handle 1 with a strong force and can transmit the rotation of the wrist to the knob portion 2 without difficulty.

  Further, in the rotary handle 1 of the present embodiment, since the bulging portion 23 that protrudes outward is provided at the end portion 20 of the knob portion 2, when the operator grips the rotary handle 1, the bulge is formed. The palm 23 can be supported by the portion 23 pressing near the center of the palm 53. As a result, the operator can easily twist the wrist with the bulging portion 23 as a fulcrum, and the wrist can be easily rotated. It can be transmitted to the knob part 2. In particular, when the bulging portion 23 is formed by a curved surface that protrudes outward in the axial direction of the shaft member 4, there is no gap in the end portion 20 of the knob portion 2 from the vicinity of the base 52 of the finger to the vicinity of the center of the palm 53. Since they can be brought into close contact with each other (FIGS. 4 and 5), even when the wrist is rotated with a strong force, the powerful rotational force of the wrist can be transmitted to the knob portion 2 without waste. Since the bulging portion 23 of the knob portion 2 is pressed by the operator near the center of the palm 53 when the rotary handle 1 is gripped, the above-described effects can be achieved regardless of the size of the operator's hand 5. Can play. In addition, the axially outward direction of the shaft member 4 means a side where the shaft 41 of the shaft member 4 is extended beyond the end of the shaft member 4 or an area thereof.

  As can be understood with reference to FIGS. 1 and 2, in the rotary handle 1 of the present embodiment, six convex portions 21 and six concave portions 22 of the knob portion 2 are arranged. When six convex portions 21 and six concave portions 22 are arranged on the outer peripheral portion 10 of the knob portion 2, when the finger 51 of the hand is in a so-called gripping state, the thumb and the little finger with the widest gap between the finger 51 and the finger 51 are widened. Since one idle recess 22 can be arranged between the fingers, each finger 51 of the hand can be comfortably fitted to the protrusion 21 and the recess 22, and as a result, the operability of the rotary handle 1 is further improved. improves.

  In the rotary handle 1 of the present embodiment, the bottom 222 of the outer peripheral surface 221 of the recess 22 is disposed at an equal distance from the shaft 41 of the shaft member 4. Moreover, the topmost part 212 of the outer peripheral surface 211 of the convex part 21 is also arrange | positioned at equal distance from the axis | shaft of the shaft member 41, respectively (refer FIG.2, 6).

  When the bottom 222 of the outer peripheral surface 221 of the concave portion 22 is arranged at an equal distance from the shaft 41 of the shaft member 4, the concave portion 22 is arranged so that each finger 51 when the operator places the knob portion 2 in a so-called gripping state. Since it approximates the arrangement, the fit and adhesion when the finger 51 is placed on the recess 22 are further improved. In addition, there is an advantage that the allowable range of the operator's hand 5 is expanded (see FIG. 4).

  When the topmost portion 211 of the outer peripheral surface 211 of the convex portion 21 is arranged at an equal distance from the shaft 41 of the shaft member 4, the convex portion 21 is arranged so that an operator with a large hand 5 holds the knob portion 2 in a so-called gripping state. Since it approximates to the arrangement of the bases 52 of the fingers or the shape of the palm 53 at the time of setting, the fit and adhesion when the finger base 52 or the palm 53 is placed on the convex portion 21 are further improved. . Further, even in an operator having a relatively large hand 5 size, there is an advantage that the allowable range of the hand 5 to be expanded is widened (see FIG. 5).

  The “distance from the shaft 41 of the shaft member 4 to the bottommost portion 222 of the outer peripheral surface 221 of the concave portion 22” used here is the axis 41 of the shaft member 4 from the bottommost portion 222 of the outer peripheral surface 221 of the concave portion 22. Means the length of the perpendicular line when the perpendicular line is lowered, and substantially means the shortest distance from the shaft 41 of the shaft member 4 to the recess 22. The “distance from the shaft 41 of the shaft member 4 to the topmost portion 212 of the outer peripheral surface 211 of the convex portion 21” is a perpendicular line from the topmost portion 212 of the outer peripheral surface 211 of the convex portion 21 to the shaft 41 of the shaft member 4. It means the length of the perpendicular to the hour and substantially means the shortest distance from the axis 41 of the shaft member 4 to the convex portion 21 (see FIGS. 2 and 6). The shaft 41 of the shaft member 4 includes not only the shaft 411 inside the shaft member 4 but also the shaft 412 outside the shaft member 4 extended coaxially (see FIG. 6).

  As shown in FIG. 2, in the rotary handle 1 of this embodiment, the convex portions 21 are arranged at equal intervals in the circumferential direction of the shaft member 4, and the concave portions 22 are also arranged in the circumferential direction of the shaft member 4, respectively. Arranged at intervals.

  When the convex portions 21 and / or the concave portions 22 are arranged at equal intervals in the respective circumferential directions, the arrangement of the convex portions 21 and / or the concave portions 22 is such that each finger 51 when the operator places the knob portion in a so-called gripping state. It approximates the arrangement, and each finger 51 of the operator can be placed at an equal interval between the convex portion 21 and the convex portion 21 or on the concave portion 22, so that between the convex portion 21 and the convex portion 21 or Fit property, hold property, and adhesion when a finger is placed on the recess 22 are further improved. In addition, there is an advantage that the operator does not have to change the grip position in accordance with the positions of the convex portion 21 and / or the concave portion 22 of the knob portion 2. Further, when an operator with a large hand 5 grips the rotary handle 1, the evenly arranged convex portions 21 press the finger base 52 or the palm 53 evenly. A uniform frictional force is generated between them, and as a result, it is possible to effectively prevent the hand 5 from slipping when the operator rotates the rotary handle 1 (see FIG. 5).

  In the rotary handle 1 of the present embodiment, the convex portions 21 have the same shape, and the concave portions 22 also have the same shape (see FIG. 2).

  When the convex portion 21 and / or the concave portion 22 have the same shape, the operator places the finger 51, the base of the finger 52, or the palm 53 on the convex portion 21 without selecting the position of the convex portion 21 and / or the concave portion 22. And / or it can make it contact | adhere on the outer peripheral surfaces 211 and 221 of the recessed part 22 without gap, and can be made to latch on the outer peripheral surfaces 211 and 221 of the knob part 2 without stress. Moreover, since the outer peripheral surface 211 of the convex part 21 and the outer peripheral surface 221 of the recessed part 22 are comprised by the continuous curved surface, the operator grasped the rotary handle 1 without selecting the position of the convex part 21 and / or the recessed part 22. Even in this case, the pressing force received from the knob portion 2 is dispersed, and local pain and stress are not felt in the operator's hand 5. Furthermore, since the appearance can be a regular curved main body with a uniform shape, it is possible to provide a human-friendly rotary handle 1 that is beautiful in appearance.

  As shown in FIGS. 1 and 6, the rotary handle 1 of the present embodiment includes a cylindrical portion 3 that is coaxially connected to the knob portion 2 and is attached to the outer periphery of the shaft member 4. The rotary handle 1 of this embodiment is based on the premise that the operator's palm 53 is pressed against the bulging portion 23 of the knob portion 2 and the operator's finger 51 puts the outer peripheral portion 10 of the knob portion 2 into a so-called gripping state. Because of the design, the length of the outer peripheral portion of the knob portion 2 along the axis 41 direction of the shaft member 4 is relatively short. Therefore, when the cylindrical portion 3 is further connected to the knob portion 2 on the same axis, the rotary handle 1 can be firmly attached to the outer periphery of the shaft member 4 without loosening. Can be effectively prevented.

FIG. 6 is a cross-sectional view taken along line AA of the rotary handle 1 shown in FIG. As shown in FIG. 2, the rotary handle 1 of the present embodiment has the shortest distance along the outer peripheral surface of the knob portion 2 from the bottom 222 of the outer peripheral surface 221 of the recess 22 to the center 231 of the bulging portion 23: A ₁ and the shortest distance D from the bottom 222 of the outer peripheral surface 221 of the recess 22 to the shaft 41 of the shaft member 4 satisfy the relationship of D ≦ A ₁ ≦ 56 mm.

Since the rotary handle 1 of the present embodiment includes the bulging portion 23 that protrudes outward at the end portion 20 of the knob portion 2, the knob portion from the concave portion 22 to the central portion 231 of the bulging portion 23. the shortest distance along the outer circumferential surface of the 2: a ₁ is the shortest distance from the inevitably recess 22 to the axis 41 of the shaft member 4: has more length D. When A ₁ ≧ D, the operator can bring the palm 53 and the finger 51 of the hand into close contact with each other along the end portion 20 and the outer peripheral portion 10 of the knob portion 2 without any gaps. It can be transmitted to the knob part 2.

According to “Japanese anthropometric data 1992-1994” (published by the Human Life Engineering Research Center), the minimum length of the middle finger (third finger) length for adult men and women is 56.3 mm for women. On the other hand, the average value of the middle finger (third finger) length of adult men and women is 76.5 mm. Accordingly, the shortest distance: by the A ₁ or less in length 56 mm, most male and female adults, beyond the recess 22 from the middle (third finger) and other fingers also the knob portion 2 of the bulging portion 23 bulging Since the knob portion 2 can be gripped by extending to the opposite side of the portion, the rotary handle 1 can be easily and firmly gripped with a strong force (see FIG. 4).

As shown in FIG. 6, rotary handle 1 of the present embodiment, the shortest distance along the outer circumferential surface of the knob portion 2 from the recess 22 to the center portion 231 of the bulging portion 23: the A _1, the knob portion 2 and the shortest distance along the outer peripheral surface of the knob portion from the connecting portion 6 of the cylindrical portion 3 to the bottom of the outer peripheral surface of the recess: the total distance with A ₂ : A ₁ + A ₂ is 56 mm ≦ A ₁ + A ₂ ≦ 98 mm is satisfied.

According to “Japanese anthropometric data 1992-1994” (published by the Research Center for Human Life Engineering), the minimum length of the middle finger (third finger) for adult men and women is 56.3 mm for women. The maximum value is 98.4 mm for men. Accordingly, the shortest distance along the outer circumferential surface of the knob portion 2 from the recess 22 to the center portion 231 of the bulging portion 23: A ₁ and the knob portion 2 from the connecting portion 6 of the knob portion 2 and the tubular portion 3 to the concave portion 22 The shortest distance along the outer peripheral surface of the tube portion: The sum of A ₂ (A ₁ + A ₂ ) is set to a length of 56 mm or more and 98 mm or less, so that the tubular portion extends from the bulging portion 23 of the knob portion 2 to the concave portion 22. can be adapted to the length of 3 and the shortest distance (a 1 _{+ a 2)} the ages of male and female adults of middle finger up connection portion 6 of the (third finger). Further, since the adhesion of the middle finger (third finger) and other fingers to the knob portion 2 is improved, the operator can easily and firmly hold the rotary handle 1 with a strong force (see FIG. 4).

Note that the “shortest” in the shortest distance: A ₁ and the shortest distance: A ₂ described above refers to the bottom portion 222 of the outer peripheral surface 221 of the recess 22 and the shaft 41 of the shaft member 4 as shown in FIG. This means that the knob section 2 has an outer cross section that appears in a cross section parallel to the axis 41 of the shaft member 4, and the shortest distance from the concave portion 22 to the axis 41 of the shaft member 4 is “the shortest” in D. Means the length of the perpendicular when the perpendicular is drawn from the bottom 222 of the outer peripheral surface 221 of the recess 22 to the shaft 41 of the shaft member 4. The shaft 41 of the shaft member 4 includes not only the shaft 411 inside the shaft member 4 but also the shaft 412 outside the shaft member 4 extended coaxially (see FIG. 6).

DESCRIPTION OF SYMBOLS 1 ... Rotary handle 10 ... Peripheral part 2 ... Knob part 20 ... End part 21 ... Convex part 211 ... Peripheral surface 212 ... Topmost part 22 ··············································································································· 222 ... Axis 411 ... Internal axis 412 ... External axis 5 ... Hand 51 ... Finger 52 ... Finger root 53 ... Hand 6 ... Link Part

Claims (12)

In a handle provided with a knob portion that is mounted on the outer periphery of the shaft member and rotated by an operator's hand in order to reciprocate the shaft member coupled to the pressing plate of the handrail for the bathtub, the knob portion is ,
A plurality of substantially hemispherical convex portions that are convex outward in the radial direction of the shaft member;
A plurality of recesses that are recessed inward in the radial direction of the shaft member, and an outer side in the axial direction of the shaft member so as to press-contact the palm of the operator when the operator grips the knob portion. It has a bulging part that protrudes toward
The convex portions and the concave portions are alternately arranged on the outer peripheral portion of the knob portion in the circumferential direction of the shaft member, and the outer peripheral surface of the convex portion and the outer peripheral surface of the concave portion are formed by continuous curved surfaces. A rotating handle for a handrail for a bathtub.   The rotary handle of the handrail for bathtubs according to claim 1, wherein the bulging portion has a curved surface that protrudes outward in the axial direction of the shaft member.   The said handle and the said recessed part are respectively arrange | positioned 5 pieces or 6 pieces, The rotary handle of the handrail for bathtubs of Claim 1 or 2 characterized by the above-mentioned.   The rotary handle of the handrail for bathtubs according to any one of claims 1 to 3, wherein the bottom part of the outer peripheral surface of the recess is arranged at an equal distance from the axis of the shaft member.   The top handle of the outer peripheral surface of the convex portion is disposed at an equal distance from the axis of the shaft member, respectively, and the rotary handle for the handrail for bathtubs according to any one of claims 1 to 4.   The rotary handle of the handrail for bathtubs according to any one of claims 1 to 5, wherein the convex portions are arranged at equal intervals in the circumferential direction of the shaft member.   The rotary handle of the handrail for bathtubs according to any one of claims 1 to 6, wherein the concave portions are arranged at equal intervals in the circumferential direction of the shaft member.   The rotary handle of the handrail for bathtubs according to any one of claims 1 to 7, wherein each of the convex portions has the same shape.   The rotary handle of the handrail for bathtubs according to any one of claims 1 to 8, wherein each of the concave portions has the same shape.   The handrail for a bathtub according to any one of claims 1 to 9, further comprising a cylindrical portion connected coaxially with the knob portion and attached to an outer periphery of the shaft member. Rotating handle. The shortest distance along the outer peripheral surface of the knob portion from the bottommost portion of the outer peripheral surface of the concave portion to the center portion of the bulged portion: and A _1, from the lowest portion of the outer peripheral surface of the recess to the axis of said shaft member The shortest distance: D satisfies the relationship of D ≦ A ₁ ≦ 56 mm, The rotary handle of the handrail for bathtubs according to claim 10. The shortest distance: and A _1, the shortest distance from the connecting portion of the cylindrical portion and the knob portion along the outer peripheral surface of the knob portion to the lowest portion of the outer peripheral surface of the recess: the total distance between the A _2: A ₁ + _{a 2} are, 56mm ≦ _a 1 + _{a 2} tub handrail rotation handle of claim 10 or 11, characterized in that satisfy ≦ 98 mm.

Images