Sports equipment
The exercise device addresses the risk of detachment and tipping by using stepped sections and projections with precise radius relationships, enhancing user safety and stability.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- QUIX CO LTD
- Filing Date
- 2024-12-02
- Publication Date
- 2026-06-12
Smart Images
Figure 2026095837000001_ABST
Abstract
Description
【Technical Field】 【0001】 The present invention relates to a type of exercise equipment that is used by placing the feet or hands on it. 【Background Art】 【0002】 Mainly for maintaining and promoting health, as an exercise equipment that is used by placing the feet or hands on it and rocking, for example, as disclosed in Patent Document 1, there is known an exercise equipment having a base portion provided with guide plates on both sides and a semi-circular main body portion that rolls on a groove sandwiched between the guide plates on both sides of the base portion. In such an exercise equipment, the guide plates can prevent the main body portion from moving or falling in a direction perpendicular to the longitudinal direction (the translation direction due to rolling). However, since the guide plates protrude compared to the side surface of the main body portion, there is a risk of injury. 【0003】 Patent Document 2 discloses an exercise equipment having a base portion with a convex portion and a semi-circular main body portion that rolls on the base portion, and the main body portion having a concave portion that engages with the convex portion on the semi-circular arc portion. In such an exercise equipment, during normal use, the convex portion on the base portion is housed in the concave portion of the main body portion and cannot be visually recognized from the outside, so the risk of injury is small. However, when the main body portion tilts greatly due to rolling, the concave portion is likely to come off from the convex portion, and there is a risk of movement or fall of the base portion in a direction perpendicular to the longitudinal direction (the translation direction due to rolling), and the accompanying exposure of the convex portion on the base portion and the risk of injury. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2002-159591 【Patent Document 2】 Japanese Patent Application Laid-Open No. 2022-103612 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 The present invention has been made in view of these points, and aims to provide an exercise device having a main body that rolls on a base, in which there is little risk of injury to the user due to the main body detaching from the base or tipping over in a direction perpendicular to the longitudinal direction. [Means for solving the problem] 【0006】 This invention was made to achieve the above objective, A first embodiment of the present invention is an exercise device having a main body and a base, wherein the main body has a limb rest, a first side portion, a second side portion and an arc portion and is capable of rolling on the base, the first side portion has a first stepped portion extending to the arc portion, the second side portion has a second stepped portion extending to the arc portion, and the base portion has a first projection that fits into the first stepped portion and a second projection that fits into the second stepped portion. 【0007】 A second embodiment of the present invention is an exercise device in which, in the first embodiment, the first stepped portion and the second stepped portion are semicircular in shape with radius R, the first projection and the second projection are semicircular in shape with radius r, and R and r satisfy the relationship 1 mm ≤ Rr ≤ 5 mm. 【0008】 A third embodiment of the present invention is, in the second embodiment, where H is the distance from the vertex of the arc portion to the limb placement level surface of the limb placement portion, the relationship between the radius r and H is given by the expression 0.5 ≤ r / H ≤ It is an exercise device that satisfies the requirement of 0.8. 【0009】 A fourth embodiment of the present invention is an exercise device in which the upper surface of the base is a flat surface, as in the third embodiment. 【0010】 A fifth embodiment of the present invention is an exercise device in which the base and the main body are made of wood, as in the fourth embodiment. [Effects of the Invention] 【0011】 According to the present invention, it is possible to provide an exercise device having a main body that can roll on a base, in which the main body may detach from the base or tip over in a direction perpendicular to the longitudinal direction, thereby reducing the risk of injury to the user. [Brief explanation of the drawing] 【0012】 [Figure 1] Figure 1 is a perspective view showing an example of an exercise device according to the present invention. [Figure 2] Figure 2 is a perspective view showing the exercise equipment in Figure 1 with the main body and base separated. [Figure 3] Figure 3 is a perspective view showing the main body of Figure 2 turned upside down. [Figure 4] Figure 4 is a front view of the exercise equipment shown in Figure 1, with the main body in the standard position and standard posture. [Figure 5] Figure 5 is a front view of the exercise equipment shown in Figure 1, showing the main body in a state where it has rolled to a certain angle. [Figure 6] Figure 6 is a front view of the exercise equipment shown in Figure 1, with the main body slightly displaced in the longitudinal direction on the base. [Figure 7] Figure 7 is an end view showing a cross-section of the exercise equipment shown in Figure 1, cut by a plane of symmetry perpendicular to the longitudinal direction. [Modes for carrying out the invention] 【0013】 The following describes embodiments for carrying out the present invention. 【0014】 (1st form) According to a first embodiment of the present invention, an exercise device is provided having a main body and a base, wherein the main body has a limb rest, a first side portion, a second side portion, and an arc portion, and is capable of rolling on the base, the first side portion has a first stepped portion extending to the arc portion, the second side portion has a second stepped portion extending to the arc portion, and the base portion has a first projection that fits into the first stepped portion and a second projection that fits into the second stepped portion. 【0015】 In the exercise equipment according to this embodiment, a limb placement part is provided at the upper part of the main body part, an arc part is provided at the lower part, and a first side surface part and a second side surface part are provided at the side surface part, respectively. The first side surface part and the second side surface part are provided opposite to each other with the limb placement part and the arc part interposed therebetween. The first step part formed on the first side surface part extends to the arc part and is formed so as to cut the arc part. The second step part formed on the second side surface part also extends to the arc part and is formed so as to cut the arc part. In the main body part, the first step part and the second step part are provided opposite to each other, and the distance between the first side surface part and the second side surface part (= the thickness of the main body part) is small at the position of both step parts. According to this embodiment, since the first protrusion part fitted into the first step part and the second protrusion part fitted into the second step part provided on the base part hold the main body part so as to sandwich it from both sides, even when the main body part rolls on the base part during use, it is possible to provide an exercise equipment with less risk of the main body part detaching from or falling over the base part. 【0016】 (Second Embodiment) According to the second embodiment of the present invention, in the first embodiment, the first step part and the second step part are semi-circular shapes with a radius R, the first protrusion part and the second protrusion part are semi-circular shapes with a radius r, and R and r satisfy the relational expression 1 mm ≤ R - r ≤ 5 mm, an exercise equipment can be provided. 【0017】 According to this embodiment, since both the first step part and the second step part are semi-circular shapes with a radius R, and both the first protrusion part and the second protrusion part are also semi-circular shapes with a radius r, and R is only slightly larger than r, the play between each step part and each protrusion part fitted thereto is also small, enabling the main body part with the arc part facing down to roll on the base part while reducing the risk that the main body part slides in the longitudinal direction with respect to the base part and moves greatly, and thus it is possible to provide an exercise equipment with less risk of the main body part detaching from the base part. 【0018】 (Third Embodiment) According to a third embodiment of the present invention, in the second embodiment, when H is the distance from the vertex of the arc portion to the limb-supporting surface of the limb-supporting portion, the radius r and H satisfy the relationship 0.5 ≤ r / H ≤ 0.8. 【0019】 According to this embodiment, the relationship between radius r and H satisfies the equation 0.5 ≤ r / H, that is, the radius r of each projection is more than half the distance H, so the vertices of each projection are sufficiently high above the center of gravity of the main body, and therefore, an exercise device can be provided that is less likely to rotate on the base around its longitudinal axis and tip over sideways. Furthermore, according to this embodiment, the relationship between radius r and H satisfies the equation r / H ≤ 0.8, that is, the radius r of each projection is less than 0.8 times the distance H, so the radius of each step provided on the main body is also less than approximately 0.8 times the distance H, and therefore, in the main body, the distance between the limb resting surface and the circumferential surface of each step is greater than approximately 0.2 times the distance H, so the strength of the part of the main body sandwiched between the limb resting surface and the circumferential surface of each step can be ensured. Thus, from the viewpoint of preventing the main body from tipping over and ensuring strength, it is preferable that the radius r and H satisfy the relationship 0.5 ≤ r / H ≤ 0.8, and the relationship 0.6 ≤ It is more preferable that r / H ≤ 0.7 is satisfied. 【0020】 (4th form) According to a fourth embodiment of the present invention, an exercise device can be provided in which the upper surface of the base is a flat surface, as in the third embodiment. 【0021】 In this form of exercise equipment, the top surface of the platform is a flat surface parallel to the floor on which the platform is placed. Therefore, even if the user rolls the main body during exercise, the entire piece of equipment remains stable, providing safety, especially for the elderly and those who are not good at exercise. Furthermore, adding friction material to the top surface of the platform, the curved part of the main body, or both will allow for even safer exercise. 【0022】 (5th form) According to a fifth embodiment of the present invention, an exercise device is provided in which the base and the main body are made of wood, as in the fourth embodiment. 【0023】 Wood is a natural material that provides a warm tactile sensation and visual relaxation, offering comfort to the user. It also possesses moderate flexibility and rigidity, resulting in excellent shock absorption and reduced strain during exercise. Furthermore, wood is highly sound-dampening, minimizing friction noise, making it suitable for use in quiet indoor environments such as homes and facilities. Its high workability allows for the creation of smooth curves and stepped sections, enabling diverse shapes for exercise equipment. In addition, wood is a renewable resource with a low environmental impact. Moreover, its natural appearance harmonizes with interior decor, creating a sense of luxury. Due to these characteristics, wooden exercise equipment in this form excels in terms of psychological comfort, functionality, and environmental considerations. 【0024】 Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. 【0025】 (Main body and base) Figure 1 is a perspective view showing an example of an exercise device according to the present invention; Figure 2 shows the exercise device of Figure 1 with the main body and base separated; Figure 3 is a perspective view showing the main body of Figure 2 turned upside down; Figure 4 is a front view of the exercise device of Figure 1 with the main body in a reference position and reference posture; and Figure 7 is an end view showing a cross-section of the exercise device shown in Figure 4, cut by a plane of symmetry perpendicular to the longitudinal direction. Note that Figure 1 shows the x, y, and z axes. In the exercise equipment shown in Figure 1, the longitudinal direction is parallel to the x-axis, the vertical direction is parallel to the y-axis, and the direction perpendicular to the longitudinal direction in the horizontal plane is parallel to the y-axis. 【0026】 As shown in Figure 1, the exercise device 1 has a main body 2 and a base 3. The user, for example, sits on a chair or bed and places both limbs (both hands or both feet) on the main body 2 which is fitted into the base 3 placed on the floor, and performs the exercise by rolling and rocking the main body 2 on the base 3. The main body 2 has an arc-shaped section 24 at its lower part, and when the main body 2 is tilted by rolling it along the arc-shaped section 24 on the base 3, gravity acts as a restoring force that tries to return the main body to a horizontal position. The user performs a reciprocating rolling motion by alternately pushing the main body 2 with both limbs against this restoring force. The main body 2 has a limb resting section 21 at its upper part, a first side section 22 and a second side section 23 on both sides, and an arc section 24 at its lower part, and is capable of rolling on the base section 3 with the arc section 24 facing downwards. Referring also to Figure (2A), the first side section 22 has a first stepped section 22a that extends to the arc section 24, and the second side section 23 has a second stepped section 23a that extends to the arc section 24. As shown in Figure (2B), the base portion 3 has a rectangular plate-like base plate 34, a first projection 32 that fits into the first stepped portion 22a, and a second projection 33 that fits into the second stepped portion 23a, and both projections 32 and 33 are provided on the upper surface 31 of the base portion. 【0027】 (First and second stepped sections of the main body) In the main body 2, the first side portion 22 and the second side portion 23 are provided opposite each other, with the limb rest portion 21 and the arc portion 24 in between, as shown in Figure 3. The first stepped portion 22a formed on the first side portion 22 extends to the arc portion 24 and is formed by cutting away the arc portion 24. The second stepped portion 23a formed on the second side portion 23 also extends to the arc portion 24 and is formed by cutting away the arc portion 24. The first stepped portion 22a consists of a semicircular first stepped portion side portion 22aa and a first stepped portion circumferential surface 22ab that surrounds it perpendicularly. The second stepped portion 23a consists of a semicircular second stepped portion side portion 23aa and a second stepped portion circumferential surface 23ab that surrounds it perpendicularly. In the main body 2, the first stepped portion 22a and the second stepped portion 23a are provided opposite each other, and the distance L2 between the first side portion 22 and the second side portion 23 (= thickness of the main body 2) is small at both stepped portions. That is, the distance between the side portion 22aa of the first stepped portion and the side portion 23aa of the second stepped portion is L2. 【0028】 (First and second projections on the base) The upper surface 31 of the base portion 3 is provided with a semicircular first projection 32 and a semicircular second projection 33 facing each other. The first projection 32 has an inner surface 32a and an arc-shaped circumferential surface 32b on the inside facing the second projection 33, and an outer surface 32c on the outside. The second projection 33 has an inner surface 33a and an arc-shaped circumferential surface 33b on the inside facing the first projection 32, and an outer surface 33c on the outside. 【0029】 (The fit and its effect) The inner surface 32a of the first projection 32, which is fitted into the first stepped portion 22a of the main body 2, and the second projection 33, which is fitted into the second stepped portion 23a of the main body 2, are provided on the upper surface 31 of the base portion. The inner surfaces 33a face the side surfaces 22aa of the first stepped portion 22a and 23aa of the second stepped portion 23a, respectively, which are provided on the main body portion 2. As a result, the first projection 32 and the second projection 33 sandwich the main body portion 2 from both sides, restricting the movement of the main body portion 2 in the direction perpendicular to the longitudinal direction (= parallel to the y-axis) within the horizontal plane of the main body portion 2. Furthermore, the circumferential surface 32b of the first projection 32, which is fitted onto the first stepped portion 22a of the main body 2 and is provided on the upper surface 31 of the base, and the circumferential surface 33b of the second projection 33, which is fitted onto the second stepped portion 23a of the main body 2, face the circumferential surface 22ab of the first stepped portion 22a and the circumferential surface 23ab of the second stepped portion 23a, respectively, provided on the main body 2. As a result, regardless of the rolling angle (=tilt) of the main body 2, the first projection 32 and the second projection 33 restrict the longitudinal movement of the main body 2. Therefore, even if the main body 2 rolls on the base 3 during use, there is little risk of the main body 2 detaching from the base 3 or tipping over. 【0030】 (Distance between the protrusion and the stepped portion) From the viewpoint of ensuring smooth rolling while restricting movement of the main body 2 in the direction perpendicular to the longitudinal direction (= parallel to the y-axis) within the horizontal plane on the base 3, the distance between the inner surface 32a of the first projection 32 and the side surface 22aa of the first stepped portion 22a, and the distance between the inner surface 33a of the second projection 33 and the side surface 23aa of the second stepped portion 23a, and the sum of these two distances, is preferably 0.5 mm or more and 3 mm or less, and more preferably 1 mm or more and 2 mm or less. Furthermore, from the viewpoint of ensuring smooth rolling while restricting the longitudinal movement (=x-axis direction) of the main body 2, the distance between the circumferential surface 32b of the first projection 32 and the circumferential surface 22ab of the first stepped portion 22a, and the distance between the circumferential surface 33b of the second projection 33 and the circumferential surface 23ab of the second stepped portion 23a are preferably 1 mm or more and 5 mm or less, and more preferably 2 mm or more and 4 mm or less, regardless of the rolling angle (=tilt) of the main body 2. 【0031】 (An embodiment in which the protrusion and step portion are semicircular) Figure 4 is a front view of the exercise equipment 1 showing the main body 2 in a reference position and reference posture on the base 3. In the embodiment of the present invention shown in Figure 4, both the circumferential surface 32b of the first projection 32 and the circumferential surface 33b of the second projection 33 are strip-shaped with a cross-section of a semicircle with radius r, and both the circumferential surface 22ab of the first stepped portion 22a and the circumferential surface 23ab of the second stepped portion 23a are strip-shaped with a cross-section of a semicircle with radius R. From the viewpoint of ensuring smooth rolling while restricting the movement of the main body 2 in the longitudinal direction (= x-axis direction), it is preferable that R and r satisfy the relationship 1 mm ≤ Rr ≤ 5 mm, and it is even more preferable that they satisfy the relationship 2 mm ≤ Rr ≤ 4 mm. The reference position is the position in a front view where the longitudinal coordinate (x-coordinate) of the center O3 of the arc traced by the circumferential surface 32b of the first projection 32, as seen from the floor, coincides with the longitudinal coordinate (x-coordinate) of the center O2 of the arc traced by the circumferential surface 22ab of the first stepped portion 22a. The reference posture is the position where the main body 2 is in a horizontal or nearly horizontal state, and the vertical coordinate (z-coordinate) of the center O2 of the arc traced by the circumferential surface 22ab of the first stepped portion 22a, as seen from the floor, is minimized. 【0032】 (Conditions regarding the height of the main unit) In the embodiment of the present invention shown in Figure 4, the upper part of the main body 2 is a limb resting section 21. The limb resting section 21 consists of a flat limb resting level surface 21b and an A-shaped projection 21a provided on the limb resting level surface 21b. In a front view, the distance from the center O2 of the arc traced by the circumferential surface 22ab of the first stepped section 22a (point O2 is also called the "vertex of the arc section 24") to the limb resting level surface 21b is called the "height H" of the main body 2. In this embodiment, the radius r and the height H satisfy the relationship 0.5 ≤ r / H ≤ 0.8. 【0033】 In this embodiment, the radius r and the height H satisfy the relationship 0.5 ≤ r / H, that is, Furthermore, since the radius r of the circumferential surface of each projection 32, 33 is more than half of the height H, the vertices of each projection 32, 33 are positioned sufficiently high above the center of gravity of the main body 2. Therefore, it is possible to provide an exercise device that is less likely to rotate on the base 3 around its longitudinal axis and tip over sideways. Furthermore, according to this embodiment, the radius r and height H satisfy the relationship r / H ≤ 0.8, that is, the radius r of each projection 32, 33 is less than 0.8 times the height H. Therefore, the radius R of the circumferential surface of each stepped portion 22a, 23a provided on the main body 2 is also less than approximately 0.8 times the height H. Consequently, in the main body 2, the distance between the limb-resting level surface 21b and the circumferential surface of each stepped portion 22a, 23a is greater than approximately 0.2 times the height H. Thus, the strength of the portion of the main body 2 sandwiched between the limb-resting level surface 21b and the circumferential surface of each stepped portion 22a, 23a can be ensured. In this way, from the viewpoint of preventing the main body 2 from tipping over and ensuring strength, it is preferable that the radius r and height H satisfy the relationship 0.5 ≤ r / H ≤ 0.8, and more preferably that they satisfy the relationship 0.6 ≤ r / H ≤ 0.7. 【0034】 (Restoring moment and stability) Figure 5 is a front view showing the state of the exercise equipment 1 shown in Figure 4 at the moment when the main body 2 has rolled and tilted to a certain angle during use. The main body 2 rolls and tilts longitudinally on the flat top surface 31 of the base without sliding, and in a front view, the arc portion 24 of the main body 2 and the top surface 31 of the base are in contact at the point of contact P. The apex O2 of the arc portion 24 of the main body 2 is slightly raised from the top surface 31 of the base and is located above and slightly to the right of the center O3 of the circumferential surface 32b of the first projection 32. In this state, a counterclockwise moment due to gravity acts on the main body 2 with the point of contact P as the pivot point. This moment acts in a direction that causes the main body 2 to roll back to its reference position. The user performs the exercise by moving both limbs alternately against this restoring moment due to gravity. As can be seen from Figure 4, as the main body 2 rolls, the contact point P moves significantly from side to side, and the longitudinal coordinate (x-coordinate) of point P with point O3 as the origin moves significantly from positive to negative values, but the height at which vertex O2 rises (z-coordinate) is not so large. This is because, when the main body 2 is symmetrical when viewed from the front, z is proportional to the square of x, except for small quantities of the fourth order or higher. This fact is favorable from the viewpoint of preventing the main body 2 from tipping over. 【0035】 (Horizontal displacement constraints of the main body) Figure 6 is a front view of the exercise equipment 1 shown in Figure 4, showing the state in which the main body 2 is slightly displaced longitudinally on the base 3 during use. It shows the moment when the main body 2 slides longitudinally on the flat top surface 31 of the base and displaces to the limit of the constraint on longitudinal displacement while maintaining a horizontal state, that is, without changing its posture. The circumferential surface 32b of the first projection 32 and the circumferential surface 22ab of the first stepped portion 22a are in contact at a position (point Q) slightly vertically above the top surface 31 of the base. The distance between the center O3 of the circle relating to the circumferential surface 32b of the first projection 32 and the vertex O2 of the arc portion 24 represents the above-mentioned displaced distance and is approximately equal to (Rr), but more precisely, slightly larger. Here, radius R is the radius of the circle relating to the circumferential surface 22ab of the first stepped portion 22a, and radius r is the radius of the circle relating to the circumferential surface 32b of the first projection 32. The distance between point O3 and point O2 above can be determined from geometrical considerations, and more precisely, (R - r) × (1 + R 3 / (8ρ 2 r)) is the case. Here, ρ is the radius of curvature of the arc portion 24, and higher-order infinitesimal quantities of the order of (1 / ρ)^4 or higher have been omitted. Since the radius of curvature ρ is considerably larger than R and r, the above term R 3 / (8ρ 2 r) is considerably smaller than 1 and can usually be ignored. 【0036】 In the exercise equipment 1 of this embodiment, the radius R and radius r satisfy the relationship 1 mm ≤ Rr ≤ 5 mm. Therefore, the limit of the distance that the main body 2 slides and displaces longitudinally on the base 3 is also constrained to approximately 1 mm or more and 5 mm or less. Consequently, there is little risk of the main body 2 sliding and moving a large distance longitudinally relative to the base 3, and therefore there is little risk of the main body 2 detaching from the base 3. 【0037】 (Constraints on the width or spacing of the main body and base) Figure 7 is an end view showing a cross-section of the exercise equipment 1 shown in Figure 1, cut by a vertical plane passing through the vertex O2 of the arc portion 24, which is a plane of symmetry perpendicular to the longitudinal direction. The limb resting portion 21 of the main body 2 has a width L0 in the direction perpendicular to the longitudinal direction (= parallel to the y-axis) in the horizontal plane. The arc portion 24 of the main body 2 also has a width L2. This width L2 is the same as the distance between the side surface 22aa of the first stepped portion 22a and the side surface 23aa of the second stepped portion 23a. The main body 2 has a height H. That is, H is the distance from the apex O2 of the arc portion 24 to the limb resting level surface 21b. The distance between the outer surface 32c of the first projection 32 and the outer surface 33c of the second projection 33 on the base portion 3 is L1, and the distance between the inner surface 32a of the first projection 32 and the inner surface 33a of the second projection 33 is L3. Also, the width of the top surface 31 of the base portion 3 in the direction perpendicular to the longitudinal direction (= parallel to the y-axis) in the horizontal plane is L4. 【0038】 The width L2 is slightly smaller than the spacing L3. From the viewpoint of ensuring smooth rolling while restricting the movement of the main body 2 in the direction perpendicular to the longitudinal direction (= parallel to the y-axis) within the horizontal plane on the base 3, the difference between the two (L3-L2) is preferably 0.5 mm or more and 3 mm or less, and more preferably 1 mm or more and 2 mm or less. 【0039】 Width L0, spacing L1, and width L4 are all approximately equal. From the viewpoint of eliminating the possibility that the user's hands and feet may get caught on the steps on the surface of the exercise equipment 1, causing the main body 2 to detach from the base 3 or injuring the user, the absolute value of the difference between any two lengths selected from the group consisting of width L0, spacing L1, and width L4 is preferably 3 mm or less, more preferably 2 mm or less, and even more preferably 1 mm or less. 【0040】 (Relationship between the height of the main body and the radius of the projection on the base) The radius r of each projection 32, 33 of the base portion 3 and the height H of the main body portion 2 preferably satisfy the relationship 0.5 ≤ r / H ≤ 0.8, and more preferably satisfy the relationship 0.6 ≤ r / H ≤ 0.7, from the viewpoint of preventing the main body portion 2 from tipping over and ensuring strength. If the circumferential surfaces 32b and 33b of each projection 32 and 33 are not semicircular arcs of a perfect circle when viewed from the front, the radius r cannot be defined. In such cases, the maximum height of the points belonging to each projection 32 and 33 from the upper surface 31 of the base is considered to be r in the above relational expression. 【0041】 (Size of exercise equipment) The dimensions of each part of the exercise apparatus 1 according to the present invention are not limited, but are approximately as follows: From the viewpoint of ease of use and portability, the maximum length of the main body 2 in the longitudinal direction is preferably approximately 30 cm or more and 80 cm or less, and more preferably 40 cm or more and 60 cm or less. From the viewpoint of ease of use and portability, the length of the base portion 3 in the longitudinal direction is preferably approximately 24 cm or more and 64 cm or less, and more preferably 32 cm or more and 48 cm or less. The width L0 of the main body 2 is preferably approximately 10 cm to 40 cm, and more preferably 20 cm to 30 cm, taking into consideration the size of the user's limbs. The same applies to the spacing L1 and width L4. The width of the first projection 32 and the second projection 33 of the base portion 3 in the direction perpendicular to the longitudinal direction (parallel to the y-axis) in the horizontal plane is preferably about 0.5 cm or more and 4 cm or less, and more preferably 1 cm or more and 3 cm or less, from the viewpoint of strength, etc. The same applies to the width of the circumferential surface 22ab of the first stepped portion 22a and the width of the circumferential surface 23ab of the second stepped portion 23a of the main body portion 2. The radius r of the circumferential surface of the first projection 32 and the second projection 33 of the base portion 3 is preferably approximately 5 cm to 20 cm, and more preferably 10 cm to 15 cm, from the viewpoint of preventing detachment and tipping and strength. The first stepped portion 22a and the second stepped portion 23a of the main body portion 2 The same applies to the radius R of the surrounding surface. The height H of the main body 2 is determined by the relationship 0.5 ≤ from the viewpoint of preventing detachment or tipping and ensuring strength. It is preferable that r / H ≤ 0.8 is satisfied, and it is more preferable that the relation 0.6 ≤ r / H ≤ 0.7 is satisfied. 【0042】 (Protrusion on the limb support area) As shown in Figure 1, the limb resting section 21 of the exercise device 1 has hemispherical protrusions 21a at predetermined positions on its surface, which are attached by adhesive, inlay, or other means. The surface of the protrusions 21a is smooth and has a moderate hardness, and the size of the protrusions 21a and the spacing between them are determined considering the size of the user's limbs. The protrusions 21a provide effects such as improved blood circulation through stimulation of pressure points on the soles of the feet and palms, enhanced health benefits from the exercise device 1, improved comfort during use such as stress relief and relaxation, and improved safety by making it less likely for the limbs to slip. 【0043】 The structure of the projection 21a is not limited, but the following materials are preferred, for example. Elastic materials such as silicone rubber and elastomer: The protrusions, which have a moderate hardness, can be expected to provide massage effects such as improved blood circulation through stimulation of pressure points on the soles of the feet and palms. Materials containing tourmaline and black silica: These promote far-infrared radiation and the generation of negative ions, further enhancing blood flow improvement and relaxation effects. Materials with embedded magnets: By embedding magnets within hemispherical protrusions, it is possible to add health benefits utilizing magnetism, such as improved blood circulation. Bioplastics based on polylactic acid (PLA): Environmentally friendly, possessing moderate hardness and elasticity. Easy to process, allowing for enhanced acupressure stimulation through surface treatment. A composite material of ceramic and fiber: It is expected to have a cooling effect and a relaxing effect. It has high hardness, and a non-slip effect can be added to the surface through processing. Biodegradable polymers: Possess moderate elasticity and hardness, and are environmentally friendly throughout the product lifecycle, including after disposal. Plastic with trace amounts of germanium: Promotes blood flow and has antioxidant properties. Easy to process and suitable for long-term use. Natural latex: Possesses moderate elasticity and antibacterial properties. Naturally derived, gentle on the skin, and easy to adjust in terms of elasticity and hardness. Composite material containing diatomaceous earth: Excellent humidity control and far-infrared effect. Highly durable and also offers antibacterial and deodorizing effects. Carbon fiber reinforced plastic (CFRP): Lightweight and highly rigid, it efficiently distributes pressure. It offers high durability and allows for a smooth surface finish. Thermoplastic polyurethane (TPU): Combines elasticity and durability, and surface treatment can optimize acupressure stimulation. It has a good balance of flexibility and strength. Bioceramics: Excellent for generating negative ions and far-infrared effects. They offer the hardness of ceramics while being lightweight. A hybrid material of cork and resin: provides natural softness and a pleasant stimulation to pressure points. It is environmentally friendly, lightweight, and elastic. Honey-derived propolis-containing resin: Possesses antibacterial and soothing properties. Special surface treatment provides smoothness and moderate friction. Silicon-based biomaterial: Excellent far-infrared effect and antioxidant properties. Adjustable hardness and flexibility, and highly durable. 【0044】 (Shape of the arc) The arc portion 24 of the main body 2 has an arc shape when viewed from the front, as shown in Figure 4, etc. The radius of the arc is preferably 40 cm or more and 90 cm or less, and more preferably 50 cm or more and 80 cm or less, from the viewpoint of ensuring a gravity-induced restoring torque that allows the user to smoothly and comfortably perform the reciprocating rolling motion of the main body 2 on the base 3. 【0045】 (Shape of the main body) The vertical cross-section of the main body 2, including its longitudinal direction (= cross-section parallel to the zx plane), is enclosed by arcs and line segments, as shown in Figures 3 and 4, except for the first stepped portion 22a, the second stepped portion 23b, and the projection 21a. This shape remains unchanged even when the position of the vertical cross-section is moved in the horizontal plane in a direction perpendicular to the longitudinal direction (= direction parallel to the y-axis). The portion of the first side surface 22 excluding the first stepped portion 22a is a flat surface and is perpendicular to the curved surface that constitutes the arc portion 24. The side surface 22aa of the first stepped portion 22a is a flat surface and is parallel to the flat surface that constitutes the portion of the first side surface 22 excluding the first stepped portion 22a. The portion of the second side surface 23 excluding the second stepped portion 23a is also a flat surface and is perpendicular to the curved surface that constitutes the arc portion 24. The side surface 23aa of the second stepped portion 23a is also a flat surface and is parallel to the flat surface that constitutes the portion of the second side surface 23 excluding the second stepped portion 23a. In a vertical cross-section of the main body 2 that includes the longitudinal direction, the shape of the cross-section that intersects with the first stepped portion 22a remains unchanged, except for the projection 21a, even if the position of the vertical cross-section is moved in a direction perpendicular to the longitudinal direction (= parallel to the y-axis) in the horizontal plane, as long as the cross-section intersects with the first stepped portion 22a. In a vertical cross-section of the main body 2 that includes the longitudinal direction, the shape of the cross-section that intersects with the second stepped portion 23a remains unchanged, except for the projection 21a, even if the position of the vertical cross-section is moved in a direction perpendicular to the longitudinal direction (= parallel to the y-axis) in the horizontal plane, as long as the cross-section intersects with the second stepped portion 23a. 【0046】 (Transformed forms and variations) It should be noted that the present invention is not limited to the embodiments described above, and can be appropriately improved and modified without departing from the basic principles of the present invention. 【0047】 For example, referring to Figure 3, in the main body 2, the ridges defining the boundary between the arc portion 24 and the first side portion 22, the ridges defining the boundary between the arc portion 24 and the second side portion 23, the ridges defining the boundary between the first side portion 22 and the second side portion 23 and the footrest portion 21, the ridges defining the periphery of the first stepped portion 22a, the ridges defining the periphery of the second stepped portion 23a, and the convex vertices of the main body 2 can be rounded with a radius of curvature of about 1 to 8 mm by filing or the like for purposes such as preventing injury. Furthermore, referring to Figure (2B), in the base portion 3, the edges and vertices of the plate-like portion (= base plate 34) excluding both protrusions 32 and 33, the edge defining the boundary between the inner surface 32a and the circumferential surface 32b of the first protrusion 32, the edge defining the boundary between the outer surface 32c and the circumferential surface 32b, the edge defining the boundary between the inner surface 33a and the circumferential surface 33b of the second protrusion 33, and the edge defining the boundary between the outer surface 33c and the circumferential surface 33b, etc., can be rounded with a radius of curvature of about 1 to 8 mm by filing or the like to prevent injury. 【0048】 In the base portion 3, the first projection 32 and the second projection 33, which are semicircular plate-like bodies, are attached to the base portion bottom plate 34 by adhesive, fitting, screwing, etc., or are integrally formed with the base portion bottom plate 34 by cutting, casting, etc. The base portion bottom plate 34 is preferably made of wood, but may also be made of resin, rubber, ceramic, metal, etc. The first projection 32 and the second projection 33 are also preferably made of wood, but may also be made of resin, hard rubber, ceramic, metal, etc. 【0049】 The parts of the main body 2 excluding the protrusion 21a are preferably made of wood, but may also be made of resin, hard rubber, ceramic, or metal. 【0050】 Referring to Figure 4, the arc portion 24 of the main body 2 is preferably a circular arc in a front view, but it does not have to be strictly a circle. It can be a symmetrical, smooth, and convex curved arc such as an ellipse, parabola, hyperbola, or a convex curve represented by an even polynomial of degree 4 or higher. In that case, the radius of curvature ρ of the curved arc at vertex O2 on the symmetric line of symmetry of the arc portion 24 is preferably 40 cm or more and 90 cm or less, and more preferably 50 cm or more and 80 cm or less, from the viewpoint of ensuring a gravitational restoring torque that allows the user to smoothly and comfortably perform the reciprocating rolling motion of the main body 2 on the base 3. 【0051】 Referring to Figure 4, the circumferential surfaces 23b of the first projection 32, the circumferential surfaces 33b of the second projection 33, the circumferential surfaces 22ab of the first stepped portion 22a, and the circumferential surfaces 23ab of the second stepped portion 23a are preferably in the shape of a semicircular arc of a perfect circle when viewed from the front. However, they do not have to be strictly perfect circles, and any symmetrical, smooth, upward-convex curved arc such as an ellipse, parabola, hyperbola, or an upward-convex curve represented by an even polynomial of degree 4 or higher is acceptable. In that case, from the viewpoint of ensuring smooth rolling while restricting the movement of the main body 2 in the longitudinal direction (= x-axis direction), the distance between the circumferential surface 23b of the first projection 32 and the circumferential surface 22ab of the first stepped portion 22a, and the distance between the circumferential surface 33b of the second projection 33 and the circumferential surface 23ab of the second stepped portion 23a are preferably 1 mm or more and 5 mm or less, and more preferably 2 mm or more and 4 mm or less, regardless of the rolling angle of the main body 2. 【0052】 Furthermore, to ensure safer use, anti-slip treatments may be applied, such as attaching a rubber sheet or applying an anti-slip coating to the arc portion 24 of the main body 2 and / or the upper surface 31 of the base portion 3. 【0053】 Furthermore, the upper surface 31 of the base portion 3 does not have to be a flat surface; it may be a gently convex (concave) curved surface in the longitudinal direction (parallel to the x-axis) or a gently convex (convex) curved surface. In that case, the absolute value of the radius of curvature of the upper surface 31 of the base portion is preferably at least twice, and more preferably at least three times, the radius of curvature ρ of the arc portion 24 of the main body portion 2. Note that when the absolute value of the radius of curvature of the upper surface 31 of the base portion is ∞ (infinity), it corresponds to the case of a flat surface. 【0054】 Making the top surface 31 of the base a gently convex concave shape improves the stability and safety of the exercise. The concave surface generates a restorative force that naturally returns the user's center of gravity and the exercise equipment to the center, allowing for effortless rocking motions. In addition, weight is more easily concentrated in the center, enabling efficient force transmission, making it particularly suitable for beginners and the elderly. Furthermore, the concave surface provides a structure that prevents falls and slips, making it highly safe as rehabilitation and light exercise equipment. As a result, users can continue exercising in a stable and relaxed environment. 【0055】 Making the top surface 31 of the platform a gently convex shape allows for dynamic balance exercises, activating muscles throughout the body. The convex surface makes it easier for the center of gravity to shift outward, requiring greater use of core and foot muscles to maintain balance, thus improving muscle strength, flexibility, and balance. Furthermore, the ability to perform multi-directional movements (forward, backward, left, and right) makes it suitable for more advanced training and sports rehabilitation. The convex design is intended for intermediate and advanced users, and is effective for those aiming to strengthen their core while increasing exercise load. 【0056】 Furthermore, in the embodiment of the present invention shown in Figure 1, the limb resting portion 21 of the main body 3 has a flat foot resting surface 21b, and the hemispherical projection 21a is provided on the limb resting surface 21b. However, it is also possible to provide left and right stepped portions on the limb resting surface 21b, where the stepped portion consists of a stepped portion flat surface and a stepped portion circumferential surface that surrounds it and connects to the foot resting surface 21b, and the hemispherical projection 21a is provided on the stepped portion flat surface which is 0.5 cm to 2 cm higher or lower than the limb resting surface 21b. By providing left and right stepped portions, the user is required to exercise while maintaining the correct posture, which elicits more natural limb movements and improves the user's weight transfer and balance. This promotes proper alignment. As a result, more effective exercise using the entire body is achieved than simple stepping or pushing exercises. In addition, by providing hemispherical protrusions 21a on appropriately placed steps, it is possible to stimulate muscles and joints that are difficult to move with normal walking or manual work, making it useful as a rehabilitation and joint function recovery device. [Industrial applicability] 【0057】 Thus, the exercise device 1 according to the present invention prevents the relative positions of the base 3 and the main body 2 from shifting during exercise, enabling stable use, providing safe and effective exercise, promoting blood circulation through small, rapid movements of the limbs and providing a relaxing effect, making it particularly suitable for use to alleviate lack of exercise and for maintaining muscle strength in the elderly. The present invention has broad applicability in a variety of industries, including household goods, medical care, rehabilitation, nursing care and welfare, healthcare, fitness, sports, education and public facilities, leisure and hospitality, etc. [Explanation of Symbols] 【0058】 1 exercise equipment 2 Main body 21 Limb rest 21a Protrusion 22 First side section 22a First stepped section 22aa Side view of the first stepped section 22ab Peripheral surface of the first stepped section 23 Second side section 23a Second stepped section 23aa Side view of the second step section 23ab Circumferential surface of the second step section 24 Arc section 3 base 31 Top surface of the base 32 First projection 32a Inner surface of the first projection 32b Circumferential surface of the first projection 32c Outer surface of the first projection 33 Second projection 33a Inner surface of the second projection 33b Circumferential surface of the second projection 33c Outer surface of the second projection 34 Base bottom plate R radius r radius ρ: radius of curvature H: distance (height) O2 vertex, O3 vertex L0, L2 width L1, L3 spacing
Claims
[Claim 1] It is an exercise device having a main body and a base. The main body has a limb resting portion, a first side portion, a second side portion, and an arc portion, and is capable of rolling on the base portion. A first stepped portion is formed on the first side surface portion, extending to the arc portion. A second stepped portion is formed on the second side portion, extending to the arc portion. The base portion has a first projection that fits into the first stepped portion and a second projection that fits into the second stepped portion. exercise equipment. [Claim 2] The exercise device according to claim 1, wherein the first stepped portion and the second stepped portion are semicircular in shape with radius R, and the first projection portion and the second projection portion are semicircular in shape with radius r, and R and r satisfy the relationship 1 mm ≤ R - r ≤ 5 mm. [Claim 3] The exercise device according to claim 2, wherein when H is the distance from the vertex of the arc portion to the limb-supporting surface of the limb-supporting portion, the radius r and H satisfy the relationship 0.5 ≤ r / H ≤ 0.
8. [Claim 4] The exercise apparatus according to claim 3, wherein the upper surface of the base is a flat surface. [Claim 5] The exercise equipment according to claim 4, wherein the base and the main body are made of wood.