Sports aids

Abstract

The objective is to provide an exercise aid that is stretchable and capable of maintaining left-right balance. [Solution] The present invention relates to a rod-shaped exercise aid that is extendable and retractable in the longitudinal direction, comprising: a base located in the center of the longitudinal direction of the exercise aid; a first length adjustment part that can be slid and moved longitudinally from one end of the base; and a second length adjustment part that can be slid and moved longitudinally from the other end of the base, different from the one end; the base and the first length adjustment part can be fixed at any position; the base and the second length adjustment part can be fixed at any position; the first length adjustment part and the second length adjustment part have symmetrical shapes with respect to the longitudinal center line of the base; and the positions of the first length adjustment part and the second length adjustment part can be fixed so that the exercise aid is symmetrical with respect to the center line.

Description

Technical Field

[0001] The present invention relates to a stretchable exercise aid.

Background Art

[0002] Due to the increasing awareness of health, various training methods and exercise aids for training have been proposed. For example, when performing light exercises such as back extension, bending the body forward, backward, left, or right, or twisting the body, an exercise aid that is held in both hands to enhance the effect of the exercise is disclosed (see Patent Document 1). More specifically, in Patent Document 1, a shaft rod is passed through two cylindrical grip portions provided with finger-hooking portions at both ends, and stopper portions are attached to both ends of the shaft rod, thereby enabling a movement aid in which the grip portions can be slid is disclosed.

[0003] However, in Patent Document 1, although the grip portion can be slid, the length of the exercise aid cannot be changed. Therefore, the exercises that can utilize this exercise aid are also limited. In order to use a rod-shaped exercise aid in more exercises, it was necessary to prepare a plurality of exercise aids with different lengths.

[0004] In addition, even for a rod-shaped and stretchable exercise aid, when performing an exercise while holding both ends of the rod-shaped exercise aid in each hand, if the balance is different between the left and right, the loads on both hands, both arms, both shoulders, etc. will be different, and there is a problem that an appropriate exercise cannot be provided.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] This invention was made to solve the above problems. Specifically, the purpose of this invention is to provide an exercise aid that is extendable and capable of maintaining left-right balance. [Means for solving the problem]

[0007] The present invention solves the above problems as follows. [1] A rod-shaped exercise aid that is extendable and retractable in the longitudinal direction, comprising: a base located in the center of the longitudinal direction of the exercise aid; a first length adjustment part that can slide and move longitudinally from one end of the base; and a second length adjustment part that can slide and move longitudinally from the other end of the base, different from the one end; the base and the first length adjustment part can be fixed at any position; the base and the second length adjustment part can be fixed at any position; the first length adjustment part and the second length adjustment part have symmetrical shapes with respect to the longitudinal center line of the base; and the positions of the first length adjustment part and the second length adjustment part can be fixed so that the exercise aid is symmetrical with respect to the center line; [2] The exercise aid according to [1], comprising a third length adjustment part that can be moved longitudinally from a side different from the side on which the first length adjustment part is connected to the base, relative to the first length adjustment part, and a fourth length adjustment part that can be moved longitudinally from a side different from the side on which the second length adjustment part is connected to the base, wherein the first length adjustment part and the third length adjustment part can be fixed at any position, the second length adjustment part and the fourth length adjustment part can be fixed at any position, the third length adjustment part and the fourth length adjustment part have a shape that is symmetrical with respect to the longitudinal center line of the base, and the positions of the third length adjustment part and the fourth length adjustment part can be fixed so that the exercise aid is symmetrical with respect to the center line; [3] The exercise aid according to [1] or [2], wherein the base is cylindrical or cylindrical, the first length adjustment part is cylindrical and can be rotated relative to the base on an axis in the longitudinal direction, and the base can be inserted from one end of the base, and the second length adjustment part is cylindrical and can be rotated relative to the base on an axis in the longitudinal direction, and the base can be inserted from the other end of the base; [4] An exercise aid as described in any of [1] to [3], wherein the base or the first length adjustment part can be fixed at any position by rotating the base or the first length adjustment part around its longitudinal axis, and the base or the second length adjustment part can be fixed at any position by rotating the base or the second length adjustment part around its longitudinal axis; [5] The exercise aid according to [3] or [4], wherein the third length adjustment part is cylindrical and can be rotated relative to the first length adjustment part on an axis in the longitudinal direction, and the first length adjustment part can be inserted from the opposite side of the first length adjustment part, and the fourth length adjustment part is cylindrical and can be rotated relative to the second length adjustment part on an axis in the longitudinal direction, and the second length adjustment part can be inserted from the opposite side of the second length adjustment part; [6] An exercise aid as described in any of [3] to [5], wherein the first length adjustment part or the third length adjustment part can be fixed in any position by rotating the first length adjustment part or the third length adjustment part around the longitudinal axis, and the second length adjustment part or the fourth length adjustment part can be fixed in any position by rotating the second length adjustment part or the fourth length adjustment part around the longitudinal axis; [7] An exercise aid according to any one of [1] to [6], wherein one or both ends are capable of having different types of attachments attached to them; [8] When the direction toward the center of the longitudinal direction of the base is considered forward, the first length adjustment section has a first gripping section at the front end of the first length adjustment section, and the second length adjustment section has a second gripping section at the front end of the second length adjustment section, and when the first length adjustment section and / or the second length adjustment section are slid to move so that the first gripping section and the second gripping section are closest together, the first gripping section and the second gripping section do not come into contact with each other, as described in any of [1] to [7]; [9] When the direction toward the center of the longitudinal direction of the base is considered forward, the third length adjustment section is provided with a third gripping section at the front end of the third length adjustment section, and the fourth length adjustment section is provided with a fourth gripping section at the front end of the fourth length adjustment section, and when the first length adjustment section and / or the third length adjustment section are slid to move so that the first gripping section and the third gripping section are closest together, the first gripping section and the third gripping section do not come into contact, and when the second length adjustment section and / or the fourth length adjustment section are slid to move so that the second gripping section and the fourth gripping section are closest together, the second gripping section and the fourth gripping section do not come into contact, as described in any of [2] to [8];

[10] An exercise aid according to any one of [1] to [9], wherein the surfaces of the base, the first length adjustment section, the second length adjustment section, the third length adjustment section and / or the fourth length adjustment section are decorated with two or more different colors and / or two or more different patterns so as to be symmetrical with respect to the longitudinal center line of the base;

[11] The exercise aid according to

[10] , wherein the surfaces of the base, the first length adjustment section, the second length adjustment section, the third length adjustment section and / or the fourth length adjustment section are symmetrically arranged with respect to the longitudinal center line of the base, and gradients of two or more different colors and / or two or more different patterns are applied to them;

[12] An exercise aid according to any one of [1] to

[11] , wherein the base, first length adjustment part, second length adjustment part, third length adjustment part and / or fourth length adjustment part are coated with patterns and / or color schemes that serve as scales. [Effects of the Invention]

[0008] According to the present invention, it is possible to obtain an exercise aid that is expandable and expandable and capable of maintaining left-right balance. [Brief explanation of the drawing]

[0009] [Figure 1] This figure shows an example of an exercise aid according to an embodiment of the present invention. [Figure 2] This figure shows an example of an exercise aid according to an embodiment of the present invention. [Figure 3] This figure shows an example of an attachment part according to an embodiment of the present invention. [Figure 4] This figure shows an example of an attachment part according to an embodiment of the present invention. [Figure 5] This figure shows an example of the use of an exercise aid according to an embodiment of the present invention. [Figure 6] This figure shows an example of the use of an exercise aid according to an embodiment of the present invention. [Figure 7] This figure shows an example of the use of an exercise aid according to an embodiment of the present invention. [Figure 8] This figure shows an example of a pattern on an exercise aid according to an embodiment of the present invention. [Figure 9] This figure shows an example of a color scheme for an exercise aid according to an embodiment of the present invention. [Modes for carrying out the invention]

[0010] The embodiments of the present invention will be described below with reference to the drawings, etc., but the present invention is not limited to the following embodiments unless otherwise inconsistent with the spirit of the present invention.

[0011] FIG. 1 is a diagram showing an example of an exercise assist device according to an embodiment of the present invention. The exercise assist device 1 includes a base 10, a first length adjustment unit 11, a second length adjustment unit 12, a third length adjustment unit 13, and a fourth length adjustment unit 14. The material of each of the base 10, the first length adjustment unit 11, the second length adjustment unit 12, the third length adjustment unit 13, and the fourth length adjustment unit 14 is not particularly limited as long as it does not conflict with the spirit of the present invention. For example, a material having a light weight and high strength, such as a metal such as aluminum or titanium, or a resin such as vinyl chloride resin or acrylic resin may be used preferably.

[0012] The base 10 has a cylindrical or tubular shape and is located at the center in the longitudinal direction of the exercise assist device 1. The outer diameter of the base 10 is preferably 12 mm or more, and more preferably 14 mm or more. Also, the outer diameter of the base 10 is preferably 18 mm or less, and more preferably 20 mm or less.

[0013] The first length adjustment unit 11 is cylindrical. The outer diameter of the first length adjustment unit 11 is preferably 15 mm or more, and more preferably 17 mm or more. Also, the outer diameter of the first length adjustment unit 11 is preferably 23 mm or less, and more preferably 21 mm or less. The first length adjustment unit 11 can be slid and moved in the longitudinal direction from one end side of the base 10 with respect to the base 10. The inner diameter of the cylinder of the first length adjustment unit 11 is larger than the outer diameter of the base 10, and the base 10 can be inserted into the first length adjustment unit 11 by sliding it from one end side of the base 10.

[0014] The first length adjustment part 11 can be rotated about the longitudinal direction as the axis with respect to the base part 10. In addition to being able to rotate the first length adjustment part 11 while holding and fixing the base part 10 by hand, it is also possible to rotate the base part 10 while holding and fixing the first length adjustment part 11 by hand. By rotating the base part 10 or the first length adjustment part 11 in one direction, the base part 10 and the first length adjustment part 11 can be fixed at an arbitrary position. Also, by rotating it in the reverse direction, the state in which the base part 10 and the first length adjustment part 11 were fixed is released, and again, the base part 10 and the first length adjustment part 11 can be slid.

[0015] As a mechanism for fixing the base part 10 and the first length adjustment part 11, a known mechanism can be adopted. The fixing mechanism is provided at both ends of the base part 10. By rotating the first length adjustment part 11 with respect to the base part 10, the fixing mechanism that is in contact with the inner surface of the cylinder of the first length adjustment part 11 rotates about the longitudinal direction as the axis. Along with this rotation, the top pieces provided in the fixing mechanism are pushed and spread outward, so that the base part 10 and the first length adjustment part 11 can be fixed. As a method of pushing and spreading the top pieces, a method using a screw or a method using an eccentric shaft can be adopted (for example, the mechanism disclosed in Japanese Patent Laid-Open No. 2001-112561 can be adopted).

[0016] In the first length adjustment part 11, when the direction toward the center line in the longitudinal direction of the base part 10 is defined as the front and the direction away from the center line in the longitudinal direction is defined as the rear, a grip part 11a is provided at the front end of the first length adjustment part 11. The athlete can hold the base part 10 with one hand and grasp and rotate the grip part 11a with the other remaining hand to fix and release the fixation of the base part 10 and the first length adjustment part 11. It is preferable to use a non-slip material made of rubber such as acrylic rubber for the grip part 11a. The same applies to the other grip parts 12a, 13a, and 14a below.

[0017] Furthermore, it is preferable that the exercise aid 1 generates a sound or other noise when the base 10 and the first length adjustment part 11 are fixed together, so that the user can recognize that the base 10 and the first length adjustment part 11 have been fixed together. In order to generate a sound when the base 10 and the first length adjustment part 11 are fixed together, it is conceivable to apply a predetermined chemical (using a chemical appropriate to the material of the first length adjustment part 11) to the inside of the cylinder of the first length adjustment part 11, or to perform surface treatment such as rubbing, to make the inner surface of the first length adjustment part 11 rough. By performing such treatment, it is possible to generate a sound due to friction when the surface of the base and the inner surface of the first length adjustment part 11 come into contact. It is also possible to generate a sound when fixed by performing a similar surface treatment on the side surface of the base, but in this case, the part that the user touches will be rough, so it is preferable that the surface treatment be applied to the inner surface of the first length adjustment part 11. The sound generated when the base 10 and the first length adjustment part 11 are fixed together prevents the operator from excessively rotating the gripping part 11a and damaging the fixing mechanism. Subsequently, when other gripping parts are rotated and fixed together between the base and the length adjustment part, or between length adjustment parts, the same method as described above can be used to generate sound.

[0018] Similar to the first length adjustment section 11, the second length adjustment section 12 is cylindrical. The outer diameter of the second length adjustment section 12 is the same as the outer diameter of the first length adjustment section 11. The second length adjustment section 12 can be moved by sliding it longitudinally from the base section 10, from the other end of the base section 10, which is different from the one end of the base section 10. The inner diameter of the cylinder of the second length adjustment section 12 is larger than the outer diameter of the base section 10, and the base section 10 can be slid from the other end of the base section 10 and inserted into the second length adjustment section 12.

[0019] The second length adjustment section 12 can be rotated around the longitudinal axis relative to the base section 10. By rotating either the base section 10 or the second length adjustment section 12 in one direction, the base section 10 and the second length adjustment section 12 can be fixed at any position. The known mechanism described above can be used as the mechanism for fixing the base section 10 and the second length adjustment section 12.

[0020] In the second length adjustment section 12, if the direction toward the longitudinal centerline of the base 10 is considered forward and the direction away from the longitudinal centerline is considered backward, a gripping portion 12a is provided at the front end of the second length adjustment section 12. The operator can fix and release the base 10 and the second length adjustment section 12 by holding the base 10 with one hand and grasping the gripping portion 12a with the other hand and rotating it.

[0021] The first length adjustment section 11 and the second length adjustment section 12 are symmetrical in shape with respect to the longitudinal center line of the base section 10. The exercise aid 1 can be fixed in position so as to be symmetrical with respect to the center line. For example, the exercise aid 1 is symmetrical when the distance between the front end of the first length adjustment section 11 and the center line, and the distance between the front end of the second length adjustment section 12 and the center line are the same. The user can control the positions of the first length adjustment section 11 and the second length adjustment section 12 so that the exercise aid 1 is the desired length and that the left and right sides of the exercise aid 1 are balanced.

[0022] The third length adjustment section 13 is cylindrical. The outer diameter of the third length adjustment section 13 is preferably 18 mm or more, and more preferably 20 mm or more. Furthermore, the outer diameter of the third length adjustment section 13 is preferably 26 mm or less, and more preferably 24 mm or less. The third length adjustment section 13 can be moved relative to the first length adjustment section 11 by sliding it longitudinally from the rear end side of the first length adjustment section 11. The inner diameter of the cylinder of the third length adjustment section 13 is larger than the outer diameter of the first length adjustment section 11, and the first length adjustment section 11 can be slid from the rear end side of the first length adjustment section 11 and inserted into the third length adjustment section 13.

[0023] The third length adjustment section 13 can be rotated around the longitudinal axis relative to the first length adjustment section 11. By rotating either the first length adjustment section 11 or the third length adjustment section 13 in one direction, the first length adjustment section 11 and the third length adjustment section 13 can be fixed in any position. Conversely, by rotating them in the opposite direction, the fixed state of the first length adjustment section 11 and the third length adjustment section 13 can be released, allowing them to slide again. A known mechanism can be used as the mechanism for fixing the first length adjustment section 11 and the third length adjustment section 13.

[0024] In the third length adjustment section 11, if the direction toward the longitudinal centerline of the base section 10 is considered forward and the direction away from the longitudinal centerline is considered backward, a gripping section 13a is provided at the front end of the third length adjustment section 13. The operator can fix and release the first length adjustment section 11 and the third length adjustment section 13 by holding the first length adjustment section 11 with one hand and grasping the gripping section 13a with the other hand and rotating it.

[0025] The fourth length adjustment section 14 is cylindrical. The outer diameter of the fourth length adjustment section 14 is the same as the outer diameter of the third length adjustment section 13. The fourth length adjustment section 14 can be moved by sliding it longitudinally from the rear end side of the second length adjustment section 12 relative to the second length adjustment section 12. The inner diameter of the cylinder of the fourth length adjustment section 14 is larger than the outer diameter of the second length adjustment section 12, and the second length adjustment section 12 can be slid from the rear end side of the second length adjustment section 12 and inserted into the fourth length adjustment section 14.

[0026] The fourth length adjustment section 14 can be rotated around its longitudinal axis relative to the second length adjustment section 12. By rotating either the second length adjustment section 12 or the fourth length adjustment section 14 in one direction, the second length adjustment section 12 and the fourth length adjustment section 14 can be fixed in any position. Conversely, by rotating them in the opposite direction, the fixed state of the second length adjustment section 12 and the fourth length adjustment section 14 can be released, allowing them to slide again. A known mechanism can be used as the mechanism for fixing the second length adjustment section 12 and the fourth length adjustment section 14.

[0027] In the fourth length adjustment section 14, if the direction toward the longitudinal centerline of the base section 10 is considered forward and the direction away from the longitudinal centerline is considered backward, a gripping section 14a is provided at the front end of the fourth length adjustment section 14. The operator can fix and release the second length adjustment section 12 and the fourth length adjustment section 14 by holding the second length adjustment section 12 with one hand and grasping the gripping section 14a with the other hand and rotating it.

[0028] The third length adjustment section 13 and the fourth length adjustment section 14 are symmetrical in shape with respect to the longitudinal center line of the base section 10. The exercise aid 1 can be fixed in place so as to be symmetrical with respect to the center line. For example, the exercise aid 1 is symmetrical when the distance between the front end of the first length adjustment section 11 and the center line, and the distance between the front end of the second length adjustment section 12 and the center line are the same, and the distance between the front end of the third length adjustment section 13 and the front end of the first length adjustment section 11, and the distance between the front end of the fourth length adjustment section 14 and the front end of the second length adjustment section 12 are the same.

[0029] Therefore, the user can control the positions of the first length adjustment section 11, the second length adjustment section 12, the third length adjustment section 13, and the fourth length adjustment section 14 so that the exercise aid 1 is the desired length and that the left and right sides of the exercise aid 1 are balanced, allowing for exercise that is mindful of the body's symmetry.

[0030] The exercise aid 1 of the present invention allows for quick length adjustment, such as using it at a longer length and then immediately shortening it, enabling seamless transitions from one exercise to the next.

[0031] Furthermore, since the exercise aid 1 of the present invention can be adjusted to an appropriate length according to the height and build of the exerciser, it can enable the exerciser to perform exercises without compensatory movements.

[0032] Furthermore, scales can be marked at equal intervals on the surface of the base 10, the first length adjustment section 11, the second length adjustment section 12, the third length adjustment section 13, and the fourth length adjustment section 14. Alternatively, the scales may be marked on one or more of the surfaces of the base 10, the first length adjustment section 11, the second length adjustment section 12, the third length adjustment section 13, and the fourth length adjustment section 14. The scales may also be marked on the entire surface or on only a part of the surface. By marking the scales in this way, it can be used as a guide when adjusting the length of the exercise aid 1. If you always exercise with the exercise aid 1 at the same length, for example, if you are unable to perform an exercise properly even though you usually can, it will indicate that your physical condition is not as good as usual on that day, making it possible to understand the quality of your physical condition on any given day. Also, the more flexible a person is, the shorter or longer they can use the exercise aid 1 when performing the same exercise, making it easy to quantify their flexibility.

[0033] The markings on the surface of the exercise aid 1 may be applied as patterns and / or color schemes that serve as markings to the base 10, the first length adjustment section 11, the second length adjustment section 12, the third length adjustment section 13, and / or the fourth length adjustment section 14. Furthermore, the patterns and / or color schemes that serve as markings may be two or more different patterns and / or color schemes with two or more different spacings. These patterns are preferably symmetrical with respect to the longitudinal center line of the base 10. By applying such patterns and / or color schemes, it becomes possible to adjust the length of the exercise aid 1 without compromising its aesthetic appearance.

[0034] Figure 8 shows an example of a pattern on an exercise aid according to an embodiment of the present invention. In Figure 8, the exercise aid 1 is decorated with two types of patterns: a geometric pattern 21 and zigzag lines 22. The geometric pattern 21 is a pattern of overlapping regular hexagons, and multiple lines parallel to the longitudinal center line of the base 10 in the geometric pattern 21 are drawn at intervals of 1 cm. The zigzag lines 22 are drawn at intervals of 5 cm. When the user wants to significantly change the length of the exercise aid 1, they can refer to the zigzag lines 22 at 5 cm intervals, and when they want to make fine adjustments to the length of the exercise aid 1, they can refer to the geometric pattern 21 at 1 cm intervals.

[0035] Furthermore, the surfaces of the base 10, the first length adjustment section 11, the second length adjustment section 12, the third length adjustment section 13, and / or the fourth length adjustment section 14 may be colored with two or more different colors and / or patterns so as to be symmetrical with respect to the longitudinal center line of the base 10. Alternatively, the coloring with two or more different colors and / or patterns may be a gradient of two or more different colors and / or patterns. Such coloring and / or patterns allow the user to visually determine whether the exercise aid 1 is balanced left and right without having to accurately count the markings.

[0036] Figure 9 shows an example of a color scheme for an exercise aid according to an embodiment of the present invention. As shown in Figure 9, the exercise aid 1 is given a gradient of different colors that is symmetrical with respect to the longitudinal center line of the base 10. This color scheme makes it easier to visually grasp the distance from the longitudinal center line of the base 10, and makes it easier for the user to balance the exercise aid 1 from left to right.

[0037] Grip sections 15a and 15b are provided at the rear ends of the third length adjustment section 13 and the fourth length adjustment section 14, respectively. When the length of the exercise aid 1 is adjusted to be relatively short, the exerciser can, for example, grasp grip section 15a with their right hand and grip section 15b with their left hand. The grip sections 15a and 15b have gentle indentations 16a and 16b extending forward from the center in the longitudinal direction of the grip section 15. By forming a loop with the index finger and thumb to grasp the indentations 16a and 16b, and then grasping the area of ​​the grip sections 15a and 15b other than the indentations 16a and 16b with the palm and other fingers, the grip sections 15a and 15b can be fitted to the hand. Having such easy-to-grip grip sections 15a and 15b allows exercise to be performed without strain, making it easier to perform exercises that improve mobility.

[0038] As shown in Figure 1, the grip sections 15a and 15b are provided with protrusions 20a and 20b in front of the recesses 16a and 16b. The presence of protrusions 20a and 20b on the grip sections 15a and 15b allows the user to easily grasp the rear ends of the third length adjustment section 13 and the fourth length adjustment section 14 by making a loop with their index finger and thumb and hooking it onto the protrusions 20a and 20b. Having such easy-to-grip grip sections 15a and 15b allows for exercise without strain, making it easier to perform exercises that improve mobility.

[0039] Furthermore, it is preferable that the grip portions 15a and 15b are attached to the third length adjustment portion 13 and the fourth length adjustment portion 14 by screws. Because the grip portions 15a and 15b are attached by screws, the grip portions 15 will not come off even when the user performs an exercise that applies force to the rear of the grip portion 15, ensuring safe use. Note that when the grip portion 15 is attached by screws, the screw portion may be provided on the grip portions 15a and 15b and the screw hole may be provided on the third length adjustment portion 13 and the fourth length adjustment portion 14, or the screw portion may be provided on the third length adjustment portion 13 and the fourth length adjustment portion 14 and the screw hole may be provided on the grip portions 15a and 15b. Because the grip portions 15a and 15b are not glued to the third length adjustment portion 13 and the fourth length adjustment portion 14 but are attached by screws, it is possible to replace the grip portions 15a and 15b when they become worn.

[0040] Attachment parts 17a and 17b are provided at the rear ends of the grip parts 15a and 15b. The attachment parts 17a and 17b are located at both ends of the exercise aid 1. The attachment parts 17a and 17b can be shaped to form a smooth curved surface (excluding the groove between the attachment part and the grip part) with the grip parts 15a and 15b. In this way, the attachment parts 17a and 17b form a smooth curved surface such that the grip parts 15a and 15b are not discontinuous except for the groove, so that even people with large hands can firmly grip the exercise aid 1 using not only the grip parts 15a and 15b but also the sides of the attachment parts 17a and 17b.

[0041] The attachment parts 17a and 17b are detachable. The shapes of the attachment parts 17a and 17b can be appropriately changed according to their intended use. The attachment parts 17a and 17b have cylindrical fitting holes having the same inner diameter as the outer diameter of the cylinders of the third length adjustment part 13 and the fourth length adjustment part 14. The user can fix the attachment parts 17a and 17b to the exercise aid 1 by fitting the cylinders of the third length adjustment part 13 and the fourth length adjustment part 14 into the fitting holes of the attachment parts 17a and 17b. They can also be removed and replaced with attachment parts of other shapes as needed. Alternatively, the attachment parts 17a and 17b may be structured to be directly fitted and fixed to the grip parts 15a and 15b. This structure is particularly preferable when the grip parts 15a and 15b are attached to the third length adjustment part 13 and the fourth length adjustment part 14 by screws.

[0042] Figure 3 shows an example of an attachment part according to an embodiment of the present invention. Attachment part 17c has the same shape as attachment parts 17a and 17b and has been removed from the exercise aid 1. Attachment part 17c has a cylindrical fitting hole 18, and can be fixed to the exercise aid 1 by fitting the cylinders of the third length adjustment part 13 and the fourth length adjustment part 14 into it. Alternatively, attachment part 17c may be structured to be directly fitted and fixed to the grip parts 15a and 15b. This structure is particularly preferable when the grip parts 15a and 15b are attached to the third length adjustment part 13 and the fourth length adjustment part 14 by screws. The bottom surface of attachment part 17c is curved, so that the exercise aid 1 can be gripped without discomfort even when the bottom surface of attachment part 17c is in contact with the center of the palm.

[0043] Figure 4 shows an example of an attachment part according to an embodiment of the present invention. The attachment part 17d has a cylindrical fitting hole 18, and can be fixed to the exercise aid 1 by fitting the cylinders of the third length adjustment part 13 and the fourth length adjustment part 14 into it. Alternatively, the attachment part 17d may be structured to be directly fitted and fixed to the grip parts 15a and 15b. This structure is particularly preferable when the grip parts 15a and 15b are attached to the third length adjustment part 13 and the fourth length adjustment part 14 by screws. The bottom surface of the attachment part 17d is not a smooth curved surface, but has multiple steps, which makes it less likely to slip even when the exercise aid 1 is used standing on the floor or against a wall. In addition, the attachment part 17d has a constriction 19, and even if the exercise aid 1 is used in a position where it is at an angle to the contact surface of the attachment part 17d, the attachment part 17d tilts to match the exercise aid 1, thus preventing it from slipping from the contact surface.

[0044] In addition, attachment parts 17a and 17b can be made of materials such as rope-like rubber or ropes, which have holes for passing through auxiliary tools. One end of the rope-like rubber can be fixed to the attachment on one end of the exercise aid 1, and the other end of the rope-like rubber can be fixed to the attachment on the other end of the exercise aid 1. In this way, for example, when an exerciser lies on their back on the floor, the rubber can be crossed horizontally between the exerciser's back and the floor, and the exerciser can grasp both ends of the exercise aid 1 with their hands and move the exercise aid 1 up and down to perform an exercise similar to a bench press. By using such attachment parts, it is possible to perform exercises that add resistance to the exerciser without using heavy equipment such as a bench press.

[0045] Alternatively, attachment parts 17a and 17b can be made that have indentations, such as recesses 16a and 16b. By having indentations on both the grip part 15 and the attachment part 17, it becomes possible to grip the indentation of the grip part 15 with the thumb and index finger, and the indentation of the attachment part 17 with the little finger. By gripping the grip part 15 and the attachment part 17 in this way, when moving the exercise aid 1, the fingers can catch on the indentations, making it possible to grip the grip part 15 and the attachment part 17 stably.

[0046] Figure 2 shows an example of an exercise aid 1 according to an embodiment of the present invention. As shown in Figure 2, when the length is adjusted so that the front end of the first length adjustment section 11 (the front end of the gripping section 11a) and the front end of the second length adjustment section 12 (the front end of the gripping section 12a) are located on the longitudinal centerline of the base section 10, and further, the front end of the third length adjustment section 13 (the front end of the gripping section 13a) is located on the rear end of the gripping section 11a of the first length adjustment section 11, and the front end of the fourth length adjustment section 14 (the front end of the gripping section 14a) is located on the rear end of the gripping section 12a of the second length adjustment section 12, the exercise aid 1 of the present invention is in its shortest state. In this case, the first length adjustment section 11 is enclosed within the third length adjustment section 13, the second length adjustment section 12 is enclosed within the fourth length adjustment section 14, and further, the base section 10 is enclosed within the first length adjustment section 11 and the second length adjustment section 12. Therefore, the base 10, the first length adjustment section 11, and the second length adjustment section 12 cannot be seen from the outside.

[0047] Alternatively, although not shown in the figures, the exercise aid 1 may be structured such that when the first length adjustment section 11 and / or the second length adjustment section 12 are slid to move so that the front ends of the gripping section 11a and the front ends of the gripping section 12a are closest together, the front ends of the gripping section 11a and the front ends of the gripping section 12a do not come into contact. Furthermore, the exercise aid 1 may be structured such that when the first length adjustment section 11 and / or the third length adjustment section 13 are slid to move so that the rear end of the gripping section 11a and the front end of the gripping section 13a are closest together, the rear end of the gripping section 11a and the front end of the gripping section 13a do not come into contact, and when the second length adjustment section 12 and / or the fourth length adjustment section 14 are slid to move so that the rear end of the gripping section 12a and the front end of the gripping section 14a are closest together, the rear end of the gripping section 12a and the front end of the gripping section 14a do not come into contact. In this case, even when the exercise aid 1 of the present invention is in its shortest state, the base 10, the first length adjustment part 11, and the second length adjustment part 12 can be seen from the outside. With this structure, when shortening the exercise aid 1, it is possible to prevent the user from pinching their fingers or other body parts between the gripping parts.

[0048] On the other hand, as shown in Figure 1, when the length is adjusted so that the front end of the first length adjustment section 11 (the front end of the gripping section 11a) and the front end of the second length adjustment section 12 (the front end of the gripping section 12a) are located near the rear end in the longitudinal direction of the base section 10, and further, the front end of the third length adjustment section 13 (the front end of the gripping section 13a) is located near the rear end of the first length adjustment section 11, and the front end of the fourth length adjustment section 14 (the front end of the gripping section 14a) is located near the rear end of the second length adjustment section 12, the exercise aid 1 of the present invention is in its longest state.

[0049] The size of the exercise aid 1 of the present invention can be appropriately designed according to the attributes of the person using it, but is not particularly limited as long as it does not contradict the spirit of the present invention. The length of the exercise aid 1 when fixed in its shortest state is preferably 550 mm or more, and more preferably 600 mm or more. Furthermore, the length of the exercise aid 1 when fixed in its shortest state is preferably 700 mm or less, and more preferably 750 mm or less.

[0050] The length of the exercise aid 1 when fixed in its longest position is preferably 1300 mm or more, and more preferably 1350 mm or more. Furthermore, the length of the exercise aid 1 when fixed in its longest position is preferably 1500 mm or less, and more preferably 1450 mm or less.

[0051] In this embodiment, the exercise aid 1 is configured to include a base 10, a first length adjustment section 11, a second length adjustment section 12, a third length adjustment section 13, and a fourth length adjustment section 14. However, for example, the third length adjustment section 13 and the fourth length adjustment section 14 may be omitted, and the length may be adjusted using only the base 10, the first length adjustment section 11, and the second length adjustment section 12. Furthermore, in addition to the base 10, the first length adjustment section 11, the second length adjustment section 12, the third length adjustment section 13, and the fourth length adjustment section 14, other length adjustment sections may be provided on the rear ends of the third length adjustment section 13 and the fourth length adjustment section 14.

[0052] Next, we will describe examples of how to use the exercise aid of the present invention. Figures 5 to 7 are diagrams showing examples of how to use the exercise aid according to an embodiment of the present invention. In Figure 5, the exerciser 2 grasps both ends of the exercise aid 1 with each hand and extends both arms forward. Without bending the arms, the exerciser 2 moves the exercise aid 1 over their head and then behind, and then from behind over their head and then forward. If the exerciser 2 has high flexibility, the length of the exercise aid 1 can be adjusted to be shorter, and if the exerciser 2 has low flexibility, the length of the exercise aid 1 can be adjusted to be longer.

[0053] The exercise shown in Figure 6(a) involves grasping both ends of the exercise aid 1 with each hand, extending both arms forward, and without bending the arms, rotating the exercise aid 1 counterclockwise from the perspective of the user, so that the left hand is below and the right hand is above. Then, the arms are crossed so that the left hand is on the right and the right hand is on the left. From the crossed arms position, the exercise aid 1 is rotated clockwise, returning to the position where both arms are extended forward. Then, as shown in Figure 6(b), the exercise aid 1 is grasped with each hand, extending both arms forward, and without bending the arms, rotating the exercise aid 1 clockwise from the perspective of the user, so that the right hand is below and the left hand is above. Then, the arms are crossed so that the right hand is on the left and the left hand is on the right. From the crossed arms position, the exercise aid 1 is rotated counterclockwise, returning to the position where both arms are extended forward. If exerciser 2 has high flexibility, the length of exercise aid 1 can be adjusted to be longer; if exerciser 2 has low flexibility, the length of exercise aid 1 can be adjusted to be shorter.

[0054] In Figure 7, one end of the exercise aid 1 is placed on the floor, and the exerciser 2 places both hands on the other end of the exercise aid 1 on the upper side, performing a stretch with both arms, back, and legs extended. When one end of the exercise aid 1 is placed on the floor in this manner, it is preferable to use an attachment with a constriction, such as the attachment 17d shown in Figure 4. By using an attachment 17 with a constriction, the attachment 17 flexes, and the contact surface with the floor is widened, allowing the exercise aid 1 to be tilted stably. Furthermore, it is preferable to use a firm material such as a thermoplastic elastomer for the attachment 17 with a constriction.

[0055] Furthermore, it is preferable that the exercise aid 1 is equipped with sensors inside. For example, by equipping the exercise aid 1 with an acceleration sensor and a gyroscope sensor, the trajectory of the exercise aid 1 when the exerciser moves the exercise aid 1 can be measured. In this case, it is preferable that one acceleration sensor and one gyroscope sensor be provided on each side of the exercise aid 1, and one on each side, symmetrically positioned with respect to the longitudinal center line of the base 10. The position where the sensors are provided may be any of the grip portion 15, attachment portion 17, length adjustment portion, gripping portion, or base 10. By being able to measure the trajectory of the exercise aid 1 when the exerciser moves the exercise aid 1, the exerciser can store an ideal, reference trajectory of the exercise aid 1, such as the trajectory of the exercise aid 1 when instructed by an instructor, on a smartphone or computer, and when exercising independently, they can perform exercises while checking whether they are able to reproduce the trajectory of the exercise aid 1 when instructed by an instructor. Furthermore, even when an exerciser is being instructed by an instructor, it becomes possible to accurately evaluate whether they are able to move the exercise aid 1 horizontally without changing its height, and whether they are able to move the exercise aid 1 from side to side along the same trajectory. In addition, if the exercise aid 1 is not being moved correctly, the user may be notified by sound or a display on the screen. Notifications by sound or a display on the screen can be made via a smartphone or computer. [Explanation of Symbols]

[0056] 1 Exercise aids 10 base 11 First length adjustment section 11a Gripping part 12 Second length adjustment section 12a Grip part 13 Third length adjustment section 13a Gripping part 14. Fourth length adjustment section 14a Grip part 15. Grip section 16. Indentation 17 Attachment section 18 Fitting holes 19. Waist 20 bumps 2 exerciser 21 Geometric Patterns 22 Zigzag lines

Claims

[Claim 1] A rod-shaped exercise aid that can be extended and retracted in the longitudinal direction, The base is located in the center along the longitudinal direction of the exercise aid, A first length adjustment part that can slide and move longitudinally from one end of the base relative to the base, A second length adjustment part is provided, which can be moved by sliding in the longitudinal direction from the other end of the base, different from the one end of the base. Equipped with, The base and the first length adjustment part can be fixed at any position. The base and the second length adjustment part can be fixed in any position. The first length adjustment section and the second length adjustment section have symmetrical shapes with respect to the longitudinal center line of the base. The exercise aid can be configured to fix the positions of the first length adjustment section and the second length adjustment section so that they are symmetrical with respect to the center line. Exercise aids.

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