Muscle training apparatus

Abstract

To provide a muscle training apparatus that allows the direction of a cord withdrawn from a winding section to be changed.SOLUTION: In a muscle training apparatus, a rope-winding pulley 14 has a rope 17 wound thereon and is configured to impart an elastic force of a spiral spring 13A to the rope when the rope is pulled out. A drawing pulley 16 is provided so as to be rotatable about a rotation axis differing from the rotation axis of the rope-winding pulley. A guide roller 15 is provided so as to be rotatable about a rotation axis parallel to the rotation axis of the rope-winding pulley. The rope is guided from the rope-winding pulley to the drawing pulley via the guide roller, and the rope is redirected at the drawing pulley and drawn out from a housing. The guide roller is configured to displace along the parallel rotation axis in accordance with pulling-out of the rope from the rope-winding pulley and winding of the rope onto the rope-winding pulley.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to muscle training devices. [Background technology]

[0002] Patent Document 1 discloses a fitness device having a main body with a similar structure to a spring balancer. The main body of the fitness device has a tapered winding drum, a spring installed inside the drum, and a wire rope wound around the winding drum. With the main body suspended from the ceiling or the like by a hook, the user performs training by pulling the wire rope downward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Registered Utility Model No. 3018470 Summary of the Invention [Problem to be solved by the invention]

[0004] When the health promotion device of Patent Document 1 is placed on the floor and used, the user cannot pull the wire rope upwards because the winding drum cannot change the direction of the pulled-out wire rope.

[0005] The present disclosure has been made in light of the above circumstances, and an object of the present disclosure is to provide a muscle training device that allows the direction of a string pulled out from a winding portion to be changed. [Means for solving the problem]

[0006] A muscle training device according to one embodiment of the present disclosure includes a housing, a string pulled out from the housing, a first elastic body provided within the housing, a winding section rotatably provided within the housing, connected to the first elastic body, with the string wound around it and configured to apply the elastic force of the first elastic body to the string when the string is pulled out, a pull-out pulley rotatably provided around a rotation axis that is oriented in a direction different from the rotation axis of the winding section, and a guide roller rotatably provided around a rotation axis parallel to the rotation axis of the winding section and displaceable along the parallel rotation axis, wherein the string is guided from the winding section via the guide roller to the pull-out pulley, changes direction at the pull-out pulley and pulled out of the housing, and the guide roller is configured to displace along the parallel rotation axis as the string is pulled out of the winding section and wound around the winding section.

[0007] This muscle training device allows the direction of the string pulled out from the winding section to be changed. Therefore, the muscle training device can be placed on the floor and used. Because the guide roller is not fixed by a fixing member, collisions between the guide roller and the fixing member due to variations in component dimensions do not occur, preventing the generation of abnormal noise when the muscle training device is in use.

[0008] In the muscle training device, the guide roller may be configured to be displaceable along the parallel rotation axis from a state in which the string is fully wound around the winding portion to a state in which the string is fully unwound. With this muscle training device, the guide roller can be smoothly displaced when the string is unwound from the winding portion and wound onto the winding portion.

[0009] In the muscle training device, second elastic bodies may be provided on both sides of the guide roller in a direction along the parallel rotation axes, and the ends of each second elastic body opposite the guide roller side may be fixed. With this muscle training device, even if the guide roller collides with the second elastic bodies, the cushioning properties of the second elastic bodies can suppress abnormal noise. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a muscle training device according to an embodiment of the present invention. [Figure 2] 2 is a perspective view showing the internal structure of the main body shown in Fig. 1, in which the upper view shows the state in which the rope is not pulled out, and the lower view shows the state in which the rope is pulled out. Fig. 3 is a perspective view of the state in which the main body has been removed from the first corner of the flat plate shown in Fig. 1. [Figure 3] 3 is a perspective view showing the internal structure of a main body according to a modified example of the main body shown in FIG. 2. FIG. [Figure 4] 10 is a perspective view showing the internal structure of the main body according to the second embodiment, in which the upper view shows the state in which the rope is not pulled out, and the lower view shows the state in which the rope is pulled out. FIG. [Figure 5] FIG. 5 is a cross-sectional view of the guide roller and the guide shaft shown in FIG. [Figure 6] 6 is a cross-sectional view of the upper part of the guide roller and the guide shaft shown in FIG. 5. [Figure 7] 6 is a cross-sectional view of the lower part of the guide roller and the guide shaft shown in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0011] A muscle training device according to an embodiment of the present disclosure will be described with reference to the drawings. There are two embodiments, a first embodiment and a second embodiment. The present disclosure is not limited to the embodiments shown in the drawings. First Embodiment First, a muscle training device 1 according to a first embodiment will be described. FIG. 1 is a perspective view of the muscle training device of this embodiment. The muscle training device 1 has a flat plate 2 on which a user stands and two main bodies 10. The flat plate 2 is substantially rectangular in plan view. The two main bodies 10 are attached to and detachable from the corners of the flat plate 2. The area of ​​the flat plate 2 other than the corners where the two main bodies 10 are attached is an area on which a user can stand. FIG. 1 also includes reference numerals such as a muscle training device 201 of a second embodiment, which will be described later.

[0012] FIG. 2 is a perspective view showing the internal structure of the main body 10 shown in FIG. 1, with the upper view showing a state in which the rope 17 is not pulled out, and the lower view showing a state in which the rope 17 is pulled out. The main body 10 includes a pair of base plates 12A, 12B, a spiral spring case 13, a rope winding pulley 14, a guide roller 15, a pull-out pulley 16, and a rope 17, which is a string, inside a substantially dome-shaped housing 11. The pair of base plates 12A, 12B are each substantially flat and face each other with a gap between them. The gap is formed by a plurality of guide shafts 12C, support shafts 12D, etc., provided between the pair of base plates 12A, 12B. The remaining components 13 to 17 provided inside the housing 11 are arranged in the gap.

[0013] A spiral spring 13A is provided inside the spiral spring case 13. The spiral spring 13A is shown only schematically in the upper drawing of FIG. 2. The spiral spring case 13 is rotatable about a fixed shaft (not shown) that is provided in the center of the spiral spring case 13 and extends in the vertical direction. The center of the spiral spring 13A is fixed to the fixed shaft. The outer end of the spiral spring 13A is fixed to the spiral spring case 13. The spiral spring 13A corresponds to, for example, a first elastic body.

[0014] The rope winding pulley 14 is provided below the spiral spring case 13. The spiral spring case 13 is fixed to the rope winding pulley 14. The rope winding pulley 14 is rotatably supported on a fixed shaft and is rotatable together with the spiral spring case 13. A spiral groove 14a is formed on the outer circumferential surface of the rope winding pulley 14. The rope winding pulley 14 corresponds to, for example, a winding section.

[0015] The guide roller 15 is rotatably and vertically movable relative to the guide shaft 12C extending in the vertical direction. The guide roller 15 is rotatably mounted about a rotation axis parallel to the rotation axis of the rope winding pulley 14. The guide shaft 12C is, for example, a metal shaft. The guide roller 15 is made of, for example, a resin material. An annular groove 15a is formed on the outer circumferential surface of the guide roller 15.

[0016] The pull-out pulley 16 is provided rotatably around an axis extending horizontally. The pull-out pulley 16 is provided rotatably around an axis of rotation that is oriented in a different direction from the axis of rotation of the rope winding pulley 14. The pull-out pulley 16 changes the direction of the rope 17 from approximately horizontal to approximately vertical. Three pull-out rollers (not shown) are provided above the pull-out pulley 16. The three pull-out rollers guide the rope 17 so that it is smoothly pulled out or returned.

[0017] The rope 17 has a portion wound around the groove 14a of the rope winding pulley 14 and a portion that passes from the rope winding pulley 14 through the groove 15a of the guide roller 15, the withdrawal pulley 16, and the three withdrawal rollers, and exits through the opening 11A of the housing 11. One end of the rope 17, a first end (not shown), is fixed to the top of the groove 14a. Thus, the first end of the rope 17 is connected to the outer end of the spiral spring 13A via the rope winding pulley 14 and the spiral spring case 13. The other end of the rope 17, a second end 17A, located opposite the first end, is located outside the opening 11A. A handle 17B (see FIG. 1) that is gripped by the user is connected to the second end 17A.

[0018] 2, the rope 17 is configured to be pulled out sequentially from the lower portion of the rope winding pulley 14. When the rope 17 is not being pulled by the user, the guide roller 15 is pulled up by the rope 17 and is configured not to come into contact with the base plate 12A.

[0019] Next, the operation of components 13-17 when muscle training device 1 is in use will be described with reference to Figures 1 and 2. In muscle training device 1, when a user stands on flat plate 2 and grips and pulls handle portion 17B, rope 17 is pulled and rope winding pulley 14 rotates. This causes spiral spring case 13, which is fixed to rope winding pulley 14, to rotate, and spiral spring 13A, the outer end of which is fixed to spiral spring case 13, is wound tightly. As shown in the lower drawing in Figure 2, the portion of rope 17 wound around rope winding pulley 14 is pulled out from the lower part toward the center, so that guide roller 15 moves upward while rotating.

[0020] When the spiral spring 13A is wound, a force (elastic force) that tries to return the spiral spring 13A to its original position is generated. The elastic force is applied to the rope 17 via the spiral spring case 13 and the rope winding pulley 14. This applies a load to the muscles of the user gripping the handle portion 17B, thereby strengthening the user's muscles. In this way, when the rope 17 connected to the elastic spiral spring 13A is pulled, an elastic force that resists the tensile force is applied to the rope 17. When the user returns the handle portion 17B, the unwound rope 17 is wound around the groove 14a of the rope winding pulley 14, and the guide roller 15 moves downward while rotating. In this way, the guide roller 15 is guided by the rope 17 and moves up and down along the guide shaft 12C. The guide roller 15 is configured to be able to move up and down along the guide shaft 12C from a state in which the rope 17 is wound most tightly around the rope winding pulley 14 to a state in which the rope 17 is unwound most tightly.

[0021] As described above, the muscle training device 1 includes the housing 11, the rope 17 pulled out from the housing 11, the spiral spring 13A provided within the housing 11, the rope winding pulley 14, the withdrawal pulley 16, and the guide roller 15. The rope winding pulley 14 is rotatably provided within the housing 11, connected to the spiral spring 13A, and wound with the rope 17. When the rope 17 is pulled out, the elastic force of the spiral spring 13A is applied to the rope 17. The withdrawal pulley 16 is rotatably provided around an axis of rotation that is different in direction from the axis of rotation of the rope winding pulley 14. The guide roller 15 is rotatable around an axis of rotation that is parallel to the axis of rotation of the rope winding pulley 14 and is displaceable along the parallel axis of rotation. The rope 17 is guided from the rope winding pulley 14 via the guide roller 15 to the withdrawal pulley 16, changes direction at the withdrawal pulley 16, and is withdrawn from the housing 11. The guide rollers 15 are configured to be displaced along parallel rotation axes in response to the unwinding and winding of the rope 17 from and around the rope winding pulley 14 .

[0022] This configuration allows the direction of the rope 17 pulled out from the rope winding pulley 14 to be changed. Therefore, the muscle training device 1 can be placed on the floor and used. The guide roller 15 is configured to displace along a parallel rotation axis in response to the rope 17 being pulled out from and wound around the rope winding pulley 14. Because the guide roller 15 is not fixed by a fixing member, collisions between the guide roller 15 and the fixing member due to variations in component dimensions do not occur, and abnormal noises can be prevented when the muscle training device 1 is in use. Since twisting of the rope 17 and friction of the rope 17 against the guide roller 15 can be suppressed, damage to the guide roller 15 and the rope 17 can be suppressed.

[0023] The guide roller 15 is configured so that the rope 17 can be displaced along a parallel rotation axis from a state in which the rope 17 is wound most around the rope winding pulley 14 to a state in which the rope 17 is pulled out most.

[0024] FIG. 3 is a perspective view showing the internal structure of a main body 110 according to a modification of the main body 10 shown in FIG. 3 . The main body 110 in FIG. 3 shows a state in which the rope 17 is unwound. In the main body 110, compression springs 115B are provided on both vertical sides of the guide roller 15. The ends of each compression spring 115B opposite the guide roller 15 are fixed. The compression springs 115B correspond to, for example, a second elastic body. When the guide roller 15 moves up and down, it abuts against the compression springs 115B. This allows the speed of the guide roller 15 moving up and down to be controlled, and even if the guide roller 15 collides with the compression springs 115B, the cushioning properties of the compression springs 115B prevent abnormal noise. The elastic force of the compression springs 115B helps the guide roller 15 return to its center, stabilizing the up and down movement of the guide roller 15. Instead of the compression springs 115B, disc springs or cushioning materials such as felt may be used.

[0025] <Second embodiment> Next, a muscle training device 201 (see FIG. 1) according to a second embodiment of the present disclosure will be described. The same components as those in the muscle training device 1 of the first embodiment will be assigned the same reference numerals and will not be described again, and only the configurations different from those of the muscle training device 1 of the first embodiment will be described. As shown in FIG. 1, the muscle training device 201 has a flat plate 2 on which a user stands and two main bodies 210. The two main bodies 210 are each provided so as to be attachable and detachable to the corners of the flat plate 2. The internal structure of the main body 210 differs from the internal structure of the main body 10 of the first embodiment.

[0026] FIG. 4 is a perspective view showing the internal structure of a main body 210 according to a second embodiment, with the upper view showing a state in which the rope 17 is not pulled out, and the lower view showing a state in which the rope 17 is pulled out. FIG. 5 is a cross-sectional view of a guide roller 215 and a guide shaft 12C shown in FIG. 4. In the second embodiment, a guide roller 215 is provided instead of the guide roller 15. The guide roller 215 is cylindrical and has a through-hole 215a formed therein. The guide shaft 12C passes through the through-hole 215a. The guide roller 215 is rotatably mounted on the guide shaft 12C via a bearing 215B. The guide roller 215 and the bearing 215B are movable in the vertical direction relative to the guide shaft 12C.

[0027] Two disc springs 215C and 215D are provided on both vertical sides of the guide roller 215. Figures 6 and 7 are cross-sectional views of the upper and lower parts of the guide roller 215 and guide shaft 12C shown in Figure 5. The two disc springs 215C and 215D are stacked on top of each other with their protruding portions positioned on the outside. In Figure 6, the upper disc spring 215C is restricted from moving upward by an E-ring 215E. In Figure 7, the lower disc spring 215D is restricted from moving downward by the base plate 12A. In other words, the protruding portion of the lower disc spring 215D is fixed. The two disc springs 215C and 215D correspond to, for example, second elastic bodies.

[0028] In the second embodiment, when the rope 17 is pulled and the portion wound around the center and lower portions of the rope winding pulley 14 is pulled out, the rope 17 passes through the guide roller 215, causing the guide roller 215 to rotate and slide upward along the outer circumferential surface of the guide roller 15. This causes the guide roller 215 to be displaced upward. Disc springs 215C and 215D are provided on the upper side of the guide roller 215, and the cushioning properties of the disc springs 215C and 215D prevent abnormal noise. The two disc springs 215C and 215D are stacked, which increases the cushioning properties. When the user returns the handle portion 17B, the pulled-out rope 17 is wound around the rope winding pulley 14, and the guide roller 215 moves downward while rotating. Disc springs 215C and 215D are provided on the lower side of the guide roller 215, and the cushioning properties of the disc springs 215C and 215D prevent abnormal noise.

[0029] The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the spirit thereof, for example, the following modifications are also possible.

[0030] The rope 17 may be a string-like object, and may be made of metal wire, fiber, or plastic, with no particular limitation on the material. In the second embodiment, a compression spring may be used instead of the disc springs 215C and 215D. In this case, the compression spring is inserted into the through-hole 215a of the guide roller 215, and a bearing 215B is provided near the inner end of the compression spring.

Claims

1. A muscle training device (1, 201), comprising: A housing (11), A string (17) pulled out from the housing (11); a first elastic body (13A) provided in the housing (11); a winding section (14) that is rotatably provided within the housing (11), connected to the first elastic body (13A), has the string (17) wound around it, and is configured to impart the elastic force of the first elastic body (13A) to the string (17) when the string (17) is pulled out; a withdrawal pulley (16) that is rotatable around a rotation axis that is different in direction from the rotation axis of the winding section (14); a guide roller (15) rotatably mounted around a rotation axis parallel to the rotation axis of the winding section (14) and displaceable along the parallel rotation axis, wherein the string (17) is guided from the winding section (14) via the guide roller (15) to the withdrawal pulley (16), where the string (17) is changed in direction and withdrawn from the housing (11), and the guide roller (15) is configured to displace along the parallel rotation axis as the string (17) is withdrawn from and wound around the winding section (14).

2. 2. The muscle training device (1) according to claim 1, wherein the guide rollers (15) are configured to be displaceable along the parallel rotation axes from a state in which the string (17) is most wound around the winding portion (14) to a state in which the string (17) is most unwound.

3. A muscle training device (1, 201) as described in claim 1 or claim 2, wherein second elastic bodies (115B, 215C, 215D) are provided on both sides of the guide roller (15) in a direction along the parallel rotation axes, and the opposite end of each second elastic body (115B, 215C, 215D) to the guide roller (15) side is fixed.

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