Muscle training equipment

Abstract

To provide a muscle training apparatus that allows a user to do muscle training easily.SOLUTION: A muscle training apparatus 1 includes a flat plate 10 for a user to get on and a body 30 that can be attached to / detached from the flat plate. The body includes a base part, an elastic body provided in the base part, and a string having a first end part connected to the elastic body and a second end part positioned on a side opposite to the first end part. The elastic body is constituted so that when the second end part is pulled, elastic force against tensile force is imparted to the string.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent document 1 discloses a force generating device configured such that a rotating member winds up a string-like member by rotating, and a tensioning device, which is an elastic body such as a coil, spring, or other spring, pulls the string-like member in a direction that pulls it out from the rotating member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6482122 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in order to use the force generating device of Patent Document 1 as a training device, it must be combined with a transmission means and a frame, which makes the device large and makes it difficult to perform muscle training.

[0005] The present invention has been made in light of the above circumstances, and an object of the present invention is to provide a muscle training device that allows a user to easily perform muscle training. [Means for solving the problem]

[0006] A muscle training device according to one embodiment of the present disclosure comprises a flat plate for a user to stand on and a main body that can be attached to and detached from the flat plate, the main body having a base portion, an elastic body provided on the base portion, and a string having a first end connected to the elastic body and a second end located opposite the first end, the elastic body being configured to impart an elastic force to the string that resists a tensile force when the second end is pulled.

[0007] Two main bodies are provided, the flat plate has sides extending in a predetermined direction, the two main bodies are attached and detachable to both ends of the sides, and the areas of the flat plate other than the ends of the sides may be configured as areas on which a user can stand.

[0008] The flat plate may have an attachment portion to which the main body is attached, the attachment portion having a first plate arranged with a gap between it and the surface of the flat plate, and the main body having a second plate arranged on the underside of the base portion with a gap between it and the underside, and may be configured so that by sliding the main body relative to the attachment portion of the flat plate, the second plate of the main body enters under the first plate, preventing the main body from moving away from the attachment portion.

[0009] The second plate of the main body may be configured to slide under the first plate by rotating the main body.

[0010] A muscle training device according to one embodiment of the present disclosure includes a base portion, two elastic bodies provided on the base portion, and a string having a first end attached to one of the two elastic bodies and a second end located opposite the first end, and the two elastic bodies are configured to impart an elastic force to the string that resists the tensile force when the second end is pulled.

[0011] The two elastic bodies may be a first spiral spring and a second spiral spring, and the device may further include a switching unit that is switchable so that the elastic force that resists the tensile force is generated in only the first spiral spring or in both the first spiral spring and the second spiral spring. The switching unit may have a switching lever and a switching gear, and the switching gear is fixed to a shaft to which a center portion of the second spiral spring is fixed, and the switching lever may be configured to mesh with the switching gear to render the switching gear non-rotatable and render the center portion of the second spiral spring non-rotatable so that the second spiral spring can be wound up, or the switching lever may be configured to separate from the switching gear to render the switching gear rotatable and render the center portion of the second spiral spring rotatable together with the shaft so that the second spiral spring cannot be wound up.

[0012] The device may further include an emergency stop unit that stops the string from being pulled back when the string is pulled back without the user's force acting on it due to the elastic force generated in the two elastic bodies and applied to the string, and the emergency stop unit may include a rotating unit that rotates due to the elastic force and a stopper unit that stops the rotation of the rotating unit, the rotating unit having a protruding pin that protrudes outward from the rotating unit due to rotation due to the elastic force, and the stopper unit may be configured to stop the rotation of the rotating unit by collision with the protruding pin protruding outward from the rotating unit, thereby stopping the string from being pulled back. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a muscle training device that allows a user to easily perform muscle training. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a muscle training device according to an embodiment of the present disclosure. [Figure 2] 2 is a perspective view of the flat plate shown in FIG. 1 with the main body removed from the first corner portion. [Figure 3]3 is a plan view of a mounting portion of a first corner of the flat plate shown in FIG. 2. FIG. [Figure 4] FIG. 3 is a perspective view of the main body shown in FIG. 2 as seen from below. [Figure 5] FIG. 2 is a perspective view showing the internal structure of the main body shown in FIG. [Figure 6] FIG. 6 is a plan view of the internal structure of the main body shown in FIG. 5. [Figure 7] FIG. 7 is an explanatory diagram of the fixing portion shown in FIGS. [Figure 8] 3(a) is a perspective view showing the state in which the main body shown in FIG. 2 is abutted against the first corner of the flat plate, and FIG. 3(b) is a diagram showing the positional state of the first plate and the second plate in the main body and the flat plate in FIG. [Figure 9] 8(a) is a diagram showing the state in which the main body shown in FIG. 8(a) has been rotated to fix it to a flat plate, and FIG. 8(b) is a diagram showing the positional state of the first plate and the second plate on the main body and flat plate in FIG. 8(a). [Figure 10] 9(b) is a diagram showing a state in which the second plate is positioned below the first plate, in the positional state of the first plate and the second plate shown in FIG. 9(b). [Figure 11] FIG. 6 is a perspective view showing an internal structure of a main body different from that shown in FIG. 5. [Figure 12] FIG. 12 is a plan view of the internal structure of the main body shown in FIG. [Figure 13] 12 is a perspective view showing the appearance of a load increasing section, a switching gear of a load switching section, and an emergency stop section shown in FIG. 11. FIG. [Figure 14] FIG. 13 is a perspective view showing the internal structure of the main body shown in FIGS. 11 and 12, omitting the load increasing section and the emergency stop section. [Figure 15] FIG. 15 is a plan view of the load switching unit shown in FIG. [Figure 16] 16(a) is a perspective view of the upper side of the load switching unit shown in FIG. 14, and FIG. 16(b) is a perspective view of the lower side of the load switching unit shown in FIG. [Figure 17] 14A and 14B are plan views of the emergency stop unit shown in FIG. 13 in a non-stop state, and FIG. 14B is a plan view of the emergency stop unit in a stopped state. [Figure 18] FIG. 18 is a perspective view of the rotating part shown in FIG. [Figure 19] FIG. 19 is a partial cross-sectional view of the rotating part shown in FIG. [Figure 20] FIG. 18 is a perspective view of the stopper portion shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, muscle training devices according to embodiments of the present disclosure will be described with reference to the drawings, but the present invention is not limited to the embodiments shown in the drawings.

[0016] First Embodiment A muscle training device according to a first embodiment of the present disclosure will now be described. Fig. 1 is a perspective view of the device. The muscle training device 1 has a flat plate 10 on which a user stands and two main bodies 30.

[0017] The flat plate 10 has a substantially rectangular shape in a plan view. The flat plate 10 has a first side 11 and a second side 12 extending in the X direction (a predetermined direction), and a third side 13 and a fourth side 14 extending in the Y direction perpendicular to the X direction. The flat plate 10 further has a first corner 15 and a second corner 16 where both ends of the first side 11 are connected to the third side 13 and the fourth side 14, and a third corner 17 and a fourth corner 18 where both ends of the second side 12 are connected to the third side 13 and the fourth side 14. In the flat plate 10, a pin insertion hole 10a (FIG. 2) is formed in the first corner 15.

[0018] The two main bodies 30 are attached to and detached from the first corner 15 and the second corner 16, respectively. That is, the two main bodies 30 are attached to and detached from both ends of the first side 11, respectively. The area of ​​the flat plate 10 other than the first corner 15 and the second corner 16, where the two main bodies 30 are attached, is an area on which a user can stand. A handle 19 is provided on the outer edge of the third corner 17 so that the user can lift the flat plate 10 placed on the floor.

[0019] 2 is a perspective view of the flat plate 10 shown in FIG. 1 with the main body 30 removed from the first corner 15. FIG. 3 is a plan view of the mounting portion 20 of the first corner 15 of the flat plate 10 shown in FIG. 2. The mounting portion 20 for mounting the main body 30 is provided at the first corner 15 of the flat plate 10. The mounting portion 20 has a fixing portion 21 and three first plates 22. The fixing portion 21 has an annular shape and is fixed to the first corner 15. The three first plates 22 are plate-like pieces and are provided at the upper end of the inner circumference of the fixing portion 21 at equal intervals along the circumferential direction so as to protrude inward. Each first plate 22 has a gap 22a between it and the upper surface 10B of the flat plate 10 (see FIG. 10).

[0020] Fig. 4 is a perspective view of the main body 30 shown in Fig. 2, seen from below. As shown in Figs. 2 and 4, the main body 30 includes a housing 31. The housing 31 includes a base portion 31A (see also Figs. 5 and 6) and a substantially dome-shaped cover portion 31B.

[0021] As shown in Fig. 4, the base portion 31A is generally disk-shaped (see also Fig. 6), and three second plates 31D are provided on the lower surface 31C thereof. The second plates 31D are plate-like pieces connected to each other at the center of the base portion 31A and form a roughly three-bladed propeller shape. That is, the three second plates 31D protrude radially outward at equal intervals from the center of the base portion 31A. A gap 31e is defined between each second plate 31D and the lower surface 31C of the base portion 31A (see Fig. 10).

[0022] The cover portion 31B is provided to cover the base portion 31A and is open at the bottom. The outer periphery of the base portion 31A is supported by the lower portion of the cover portion 31B, and the portion other than the outer edge is exposed from the opening at the bottom of the cover portion 31B. Therefore, the three second plates 31D provided on the base portion 31A are exposed to the outside.

[0023] Fig. 5 is a perspective view showing the internal structure of main body 30 shown in Fig. 1. Fig. 6 is a plan view of the internal structure of main body 30 shown in Fig. 5. Opening 31F and connecting portion 37C are not shown in Fig. 6. Main body 30 includes, within housing 31 (Fig. 1), first spiral spring 32 which is an elastic body, rope wound pulley 33, two guide rollers 34, pullout pulley 35, three pullout rollers 36A to 36C, rope 37 which is a string, and fixed portion 38.

[0024] The first spiral spring 32 is disposed within a first spiral spring case 32A. The first spiral spring case 32A is rotatable about a first shaft 32B disposed at its center and extending in the vertical direction. A center portion 32C of the first spiral spring 32 is fixed to the first shaft 32B. An outer end portion 32D of the first spiral spring 32 is fixed to the first spiral spring case 32A. A rope winding pulley 33 is disposed below the first spiral spring case 32A. The first spiral spring case 32A is fixed to the rope winding pulley 33. The rope winding pulley 33 is rotatably supported on the first shaft 32B and is rotatable together with the first spiral spring case 32A. A spiral groove 33a is formed on the outer peripheral surface of the rope winding pulley 33. Three arc-shaped walls 33B are provided on the outer periphery of the rope winding pulley 33 so as to surround a portion of the outer periphery. The three walls 33B prevent the rope 37 from bending when the rope 37 is unwound.

[0025] The two guide rollers 34 are rotatably mounted on roller shafts 34A extending in the vertical direction. The height of each guide roller 34 is approximately equal to the height of the rope winding pulley 33. The pull-out pulley 35 is rotatably mounted around an axis extending in the horizontal direction. The pull-out pulley 35 changes the direction of the rope 37 from approximately horizontal to approximately vertical. Of the three pull-out rollers 36A to 36C, two pull-out rollers 36A and 36B are located above the pull-out pulley 35, and are arranged side by side with their rotation axes parallel to each other. The remaining pull-out roller 36C is located above the two pull-out rollers 36A and 36B, and is rotatably mounted in the opening 31F of the cover part 31B around a rotation axis perpendicular to the rotation axes of the two pull-out rollers 36A and 36B.

[0026] The rope 37 has a portion wound around the groove 33a of the rope winding pulley 33 and a portion that passes from the rope winding pulley 33 between the two guide rollers 34, the withdrawal pulley 35, and the two withdrawal rollers 36A and 36B and exits through the opening 31F of the cover part 31B. A first end 37A of the rope 37 is fixed to the top of the groove 33a. Therefore, the first end 37A is connected to the outer end 32D of the first spiral spring 32 via the rope winding pulley 33 and the first spiral spring case 32A. A second end 37B, located opposite the first end 37A, is located outside the opening 31F. A grip attachment part 37D to which a grip (not shown) to be held by a user is attached and a connection part 37C are connected to the second end 37B.

[0027] FIG. 7 is an explanatory diagram of the fixing portion 38 shown in FIGS. 5 and 6. In FIG. 7, only a portion of the cover portion 31B is shown. The fixing portion 38 includes a lock switch 38A, a lock pin 38B (FIG. 4), and a lock spring 38C. The lock switch 38A is supported by the cover portion 31B so that it can move up and down. The lock pin 38B is connected to a portion of the lock switch 38A located inside the cover portion 31B and extends downward, with the tip of the lock pin 38B being able to protrude below the cover portion 31B (FIG. 4). The lock spring 38C is provided below the opening 31F and abuts against a portion of the lock switch 38A, constantly biasing the lock switch 38A and the lock pin 38B downward. When the lock switch 38A is not operated, the lock pin 38B protrudes below the cover portion 31B due to the lock spring 38C (FIG. 4).

[0028] Next, a method for attaching and detaching the main body 30 to the flat plate 10 will be described.

[0029] 8(a) is a perspective view showing a state in which the main body 30 shown in FIG. 2 is abutted against the first corner portion 15 of the flat plate 10, and FIG. 8(b) is a diagram showing the positional state of the first plate 22 and the second plate 31D in the main body 30 and the flat plate 10 of FIG. 8(a). FIG. 9(a) is a diagram showing a state in which the main body 30 shown in FIG. 8(a) has been rotated to be fixed to the flat plate 10, and FIG. 9(b) is a diagram showing the positional state of the first plate 22 and the second plate 31D in the main body 30 and the flat plate 10 of FIG. 9(a). FIG. 10 is a diagram showing a state in which the second plate 31D is positioned below the first plate 22 in the positional state of the first plate 22 and the second plate 31D in FIG. 9(b).

[0030] When the main body 30 is in contact with the first corner 15 as shown in FIG. 8(a), the three second plates 31D are positioned between the three first plates 22 as shown in FIG. 8(b), so as not to interfere with each other. By rotating the main body 30 in the direction of arrow A and sliding the three second plates 31D, the three second plates 31D and the three first plates 22 overlap each other as shown in FIG. 9(b). That is, as shown in FIG. 10, the second plates 31D are positioned below the first plates 22. This prevents the main body 30 from moving away from the mounting portion 20. As a result, the main body 30 is mounted to the flat plate 10.

[0031] 9(a), the pin insertion hole 10a is located below the fixing portion 38, and the lock pin 38B (FIG. 4) enters the pin insertion hole 10a by the lock spring 38C. This restricts the rotation of the main body 30 relative to the mounting portion 20.

[0032] 9(a), the lock switch 38A is pulled up and the lock pin 38B (FIG. 4) is removed from the pin insertion hole 10a, and the main body 30 is then rotated in the direction opposite to the arrow A. The three second plates 31D shown in FIG. 8(b) are inserted between the three first plates 22, respectively, and the main body 30 is then lifted up at a position where they do not interfere with each other, thereby removing the main body 30 from the flat plate 10.

[0033] In the muscle training device 1 shown in FIG. 1, a user stands on the flat plate 10 and grasps and pulls the grip attached to the grip attachment portion 37D (FIG. 11). This pulls the rope 37, causing the rope winding pulley 33 to rotate. This rotates the first spiral spring case 32A, to which the rope winding pulley 33 is fixed, and the first spiral spring 32, whose outer end 32D is fixed to the first spiral spring case 32A, is wound up. As a result, a force (elastic force) that tries to return the first spiral spring 32 to its original position is generated in the first spiral spring 32. The elastic force is applied to the rope 37 via the first spiral spring case 32A and the rope winding pulley 33. This applies a load to the muscles of the user gripping the grip (FIG. 11), thereby training the user's muscles. In this way, when the second end 37B of the rope 37, to which the first spiral spring 32, which is an elastic body, is connected, is pulled, an elastic force that resists the tensile force is applied to the rope 37.

[0034] The muscle training device 1 includes a flat plate 10 on which a user stands, and a main body 30 that can be attached to and detached from the flat plate 10. The main body 30 includes a base portion 31A, a first spiral spring 32 provided on the base portion 31A, and a rope 37 having a first end portion 37A connected to the first spiral spring 32 and a second end portion 37B located opposite the first end portion 37A. The first spiral spring 32 is configured to apply an elastic force to the rope 37 that resists the tensile force when the second end portion 37B is pulled.

[0035] With this configuration, the user can easily perform muscle training simply by attaching the main body 30 to the flat plate 10 on which the user stands. By detaching the main body 30 from the flat plate 10, the weight can be distributed when carrying, making it easier to carry the muscle training device 1. This improves the storability of the muscle training device 1.

[0036] The two main bodies 30 are removably attached to both ends (first corner 15 and second corner 16) of the first side 11 of the flat plate 10, and the area of ​​the flat plate 10 other than both ends of the first side 11 is configured as an area on which a user can stand. This allows the flat plate 10 to be made smaller, and ultimately the muscle training device 1 to be made smaller.

[0037] By sliding the main body 30 relative to the attachment portion 20 of the flat plate 10, the second plate 31D of the main body 30 enters under the first plate 22, thereby restricting the main body 30 from moving away from the attachment portion 20. In this way, by sliding the main body 30 relative to the attachment portion 20 of the flat plate 10, the main body 30 can be easily attached to and detached from the flat plate 10.

[0038] Since the second plate 31D is configured to fit under the first plate 22 by rotating the main body 30, the main body 30 can be attached to and detached from the flat plate 10 more easily.

[0039] <Second embodiment> Next, a muscle training device 101 (see FIG. 1) according to a second embodiment of the present disclosure will be described. The same reference numerals will be used to designate the same components as those in the muscle training device 1 of the first embodiment, and descriptions thereof will be omitted. Configurations different from those in the muscle training device 1 of the first embodiment will be described.

[0040] As shown in Figure 1, the muscle training device 101 of this embodiment has a flat plate 10 on which a user stands and two main bodies 130. The two main bodies 130 are attached to and detached from the first corner 15 and the second corner 16, respectively. That is, the two main bodies 130 are attached to and detached from both ends of the first side 11, respectively. The internal structure of the main body 130 differs from the internal structure of the main body 30 of the first embodiment.

[0041] Fig. 11 is a perspective view showing the internal structure of a main body 130 according to the second embodiment. Fig. 12 is a plan view of the internal structure of the main body 130 shown in Fig. 11. In Fig. 12, the opening 31F and the pull-out rollers 36C are not shown. Fig. 13 is a perspective view showing the external appearance of the load increasing unit 40, the switching gear 55 of the load switching unit 50, and the emergency stop unit 60 shown in Fig. 11.

[0042] In addition to the components 32 to 38 of the first embodiment, the main body 130 includes a load increasing unit 40, a load switching unit 50, an emergency stop unit 60, and a second shaft 70 within a housing 31. The load increasing unit 40, the load switching unit 50, the emergency stop unit 60, and the second shaft 70 are disposed adjacent to the first mainspring case 32A and the rope winding pulley 33. As shown in FIG. 13 , a centrifugal base 63 of the emergency stop unit 60 is disposed below the second mainspring case 43 of the load increasing unit 40, and a switching gear 55 of the load switching unit 50 is disposed below the centrifugal base 63. The second shaft 70 extends vertically and passes through the second mainspring case 43, the centrifugal base 63, and the switching gear 55. The second shaft 70 is configured to be switched between a rotatable state and a non-rotatable state about its axis by the load switching unit 50.

[0043] 11 to 13, the load increasing section 40 has a first gear 41, a second spiral spring 42, a second spiral spring case 43, and a second gear 44. The first gear 41 is fixed to the outer periphery of the first spiral spring case 32A and rotates integrally with the first spiral spring case 32A.

[0044] The second power spring 42 is disposed within the second power spring case 43. The second power spring case 43 is rotatable about a second shaft 70 that passes through its center. A center portion 42A of the second power spring 42 is fixed to the second shaft 70. An outer end portion 42B of the second power spring 42 is fixed to the second power spring case 43. The second gear 44 is fixed to the outer periphery of the first power spring case 32A and rotates integrally with the first power spring case 32A. The second gear 44 meshes with the first gear 41. When the rope 37 is pulled, the first power spring case 32A rotates clockwise in FIG. 12, and the second power spring case 43 rotates counterclockwise in FIG. 12. Conversely, when the rope 37 is unwound, the first power spring case 32A rotates counterclockwise in FIG. 12, and the second power spring case 43 rotates clockwise in FIG. 12.

[0045] FIG. 14 is a perspective view showing the internal structure of the main body 130 shown in FIGS. 11 and 12, omitting the load increasing unit 40 and the emergency stop unit 60. FIG. 15 is a plan view of the load switching unit 50 shown in FIG. 14. The push latch 51 is not shown in FIG. 15. FIG. 16(a) is an upper perspective view of the load switching unit 50 shown in FIG. 14, and FIG. 16(b) is a lower perspective view of the load switching unit 50 shown in FIG. 14. The load switching unit 50 has the push latch 51, a link plate 52, a switching lever 53, a switching spring 54, and a switching gear 55.

[0046] The push latch 51 includes a support base 51A, a latch case 51B, and a push-moving portion 51C. The support base 51A is fixed to the base 31A. The latch case 51B has an opening and is fixed on the base 31A. The push-moving portion 51C is inserted into the opening of the latch case 51B and is supported so as to be slidable relative to the latch case 51B. Each time the push-moving portion 51C is pressed, the push-moving portion 51C switches between a protruding state in which its tip protrudes from the opening of the latch case 51B, and a pushed-in state in which most of it is pushed into the latch case 51B.

[0047] The link plate 52 is provided below the pressing movement portion 51C and the latch case 51B, and one end is connected to the pressing movement portion 51C via a shaft (not shown). Therefore, the link plate 52 moves in conjunction with the movement of the pressing movement portion 51C. For example, the link plate 52 moves in the up-and-down direction in FIG. 15. The switching lever 53 is located below the link plate 52 and is provided to be rotatable about a rotation shaft 53A relative to the base portion 31A. A groove 53b is formed in the end of the switching lever 53 opposite the rotation shaft 53A. A shaft 52A extending from the underside of the other end of the link plate 52 is inserted into the groove 53b. A protrusion 53C is provided on the end face of the switching lever 53 on the switching gear 55 side.

[0048] The switching spring 54 is provided in the groove 53b of the switching lever 53. When the pressing moving portion 51C is in the pressed state, the switching spring 54 is pressed by the shaft 52A of the link plate 52, and urges the switching lever 53 toward the switching gear 55 and the second shaft 70. The switching gear 55 is fixed to the lower end of the second shaft 70.

[0049] Next, a method for switching the load in the muscle training device 101 of this embodiment will be described.

[0050] When the user presses the pressing movement portion 51C to enter a pressed state, the switching spring 54 is pressed by the shaft 52A of the link plate 52, and the switching spring 54 urges the switching lever 53 toward the switching gear 55. As a result, the protrusion 53C of the switching lever 53 meshes with the switching gear 55. When the switching gear 55 attempts to rotate counterclockwise in FIG. 15 , the switching lever 53 receives a force that tends to rotate clockwise about the rotating shaft 53A due to the positional relationship between the contact surface between the protrusion 53C and the switching gear 55 and the rotation shaft 53A. Therefore, the switching lever 53 does not rotate, and the meshing between the protrusion 53C and the switching gear 55 does not disengage, so the rotation of the switching gear 55 is restricted. In other words, the switching gear 55 is prevented from rotating counterclockwise, and the second shaft 70 is also prevented from rotating counterclockwise. In this state, when the user grasps and pulls the grip (pulling the grip attachment portion 37D), the rope 37 is pulled and the rope winding pulley 33 rotates. This causes the first mainspring case 32A fixed to the rope winding pulley 33 to rotate clockwise, and the first mainspring 32, whose outer end portion 32D is fixed to the first mainspring case 32A, is wound up.

[0051] Rotation of first spiral spring case 32A causes second spiral spring case 43 to rotate counterclockwise via first gear 41 and second gear 44. Because switch gear 55 and second shaft 70 do not rotate and center portion 42A of second spiral spring 42 is fixed to second shaft 70, second spiral spring 42, whose outer end portion 42B is fixed to second spiral spring case 43, is wound up. As a result, a force (elastic force) that tries to return first spiral spring 32 and second spiral spring 42 to their original position is generated in first spiral spring 32 and second spiral spring 42, and the elastic forces of first spiral spring 32 and second spiral spring 42 are applied to rope 37. In this way, both first spiral spring 32 and second spiral spring 42 are wound up, generating elastic forces in the two elastic bodies, thereby increasing the load.

[0052] On the other hand, when the user presses the push-movement portion 51C to put it in the protruding state, the link plate 52 is pulled toward the latch case 51B, and the switching lever 53 rotates toward the latch case 51B. As a result, the protrusion 53C separates from the switching gear 55, and the switching gear 55 becomes rotatable. In this state, when the user grasps and pulls the grip, the rope 37 is pulled and the rope winding pulley 33 rotates. As a result, the first spiral spring case 32A fixed to the rope winding pulley 33 rotates clockwise, and the first spiral spring 32, whose outer end portion 32D is fixed to the first spiral spring case 32A, is wound up.

[0053] Rotation of first spring case 32A causes second spring case 43 to rotate counterclockwise via first gear 41 and second gear 44. Even when second spring case 43 rotates, because switch gear 55 and second shaft 70 are in a rotatable state, second spring 42 rotates as a whole and is not wound up. Therefore, the elastic force of only first spring 32 is applied to rope 37 via first spring case 32A and rope winding pulley 33. In this way, the load can be switched by using load switch unit 50 to place switch gear 55 in a non-rotatable state or a rotatable state.

[0054] The link plate 52 and the switching lever 53 are connected via a switching spring 54. When the protrusion 53C is meshed with the switching gear 55 to render the switching gear 55 and the second shaft 70 non-rotatable, there is play in the connection between the link plate 52 and the switching lever 53, but the switching spring 54 allows the protrusion 53C to always be meshed with the switching gear 55.

[0055] When the switching gear 55 is made non-rotatable, even if the protrusion 53C and the switching gear 55 climb up against each other, the above-mentioned backlash can absorb the climbing up against each other, and the switching gear 55 can rotate slightly due to the biasing force of the switching spring 54, so that the protrusion 53C can be properly meshed with the switching gear 55.

[0056] As described above, when the protrusion 53C is engaged with the switch gear 55 and the switch lever 53 attempts to rotate counterclockwise in FIG. 15 , due to the positional relationship between the contact surface between the switch gear 55 and the protrusion 53C and the rotation shaft 53A, the switch lever 53 receives a force that tries to rotate it clockwise around the rotation shaft 53A. For this reason, the engagement between the protrusion 53C and the switch gear 55 does not disengage, and the counterclockwise rotation of the switch gear 55 is restricted. On the other hand, when the switch gear 55 is in a rotatable state and the rope 37 is pulled out, if the load switch unit 50 switches the switch gear 55 from the rotatable state to the non-rotatable state and the rope 37 is wound around the rope winding pulley 33 by the biasing force of the first spiral spring 32, the second spiral spring case 43 rotates clockwise, and the switch gear 55 also rotates clockwise in FIG. 15 .

[0057] As a result, the second spiral spring 42 is wound in the reverse direction, which may result in damage to the second spiral spring 42. When the switching gear 55 rotates clockwise in FIG. 15 , the protrusion 53C is pressed by the switching gear 55, and due to the positional relationship between the contact surface and the rotation shaft 53A, the switching lever 53 receives a force that tends to rotate it counterclockwise around the rotation shaft 53A. When the switching lever 53 receives a force that tends to rotate it counterclockwise around the rotation shaft 53A, the play at the connection between the link plate 52 and the switching lever 53 and the switching spring 54 cause the switching lever 53 to disengage from the switching gear 55. In other words, the switching gear 55 is configured to function as a one-way gear. This prevents the second spiral spring 42 from winding in the reverse direction, thereby preventing damage to the second spiral spring 42.

[0058] FIG. 17 shows the emergency stop unit 60 shown in FIG. 13, where (a) is a plan view of the emergency stop unit 60 in a non-stop state and (b) is a plan view of the emergency stop unit 60 in a stopped state. FIG. 18 is a perspective view of the rotating unit 61 shown in FIG. 17. FIG. 19 is a partial cross-sectional view of the rotating unit 61 shown in FIG. 18. FIG. 20 is a perspective view of the stopper unit 62 shown in FIG. 17. As shown in FIG. 13, the emergency stop unit 60 is provided below the load increasing unit 40.

[0059] As shown in FIG. 17, the emergency stop unit 60 includes a rotating unit 61 and a stopper unit 62. As shown in FIGS. 17 and 18, the rotating unit 61 includes a centrifugal base 63, two guide pins 64, two protruding pins 65, and two centrifugal springs 66. The centrifugal base 63 is generally disk-shaped and fixed to the underside of the second gear 44. The centrifugal base 63 rotates integrally with the second gear 44. A second shaft 70 passes through the center of the centrifugal base 63. Slits 63a are formed in the centrifugal base 63 at positions opposite each other across the center. A cylindrical guide pin 64 is provided in each slit 63a so as to protrude outward.

[0060] Each protruding pin 65 is made of a metal material, has a cylindrical shape, and is provided slidably on the outer periphery of the guide pin 64. As shown in FIGS. 18 and 19, the protruding pins 65 are covered with a resin material. One end of each centrifugal spring 66 is connected to the centrifugal base 63, and the other end is connected to the guide pin 64. Each centrifugal spring 66 pulls the guide pin 64 toward the center of the centrifugal base 63. As shown in FIG. 17(a), when the emergency stop unit 60 is in the non-stop state, the outer end of each protruding pin 65 is located inside the outer periphery of the centrifugal base 63 due to the tensile force of each centrifugal spring 66.

[0061] As shown in FIGS. 17 and 20, the stopper portion 62 has a support portion 67, a collision portion 68, and a shock absorbing material 69. The support portion 67 is fixed to the base portion 31A and has a collision receiving portion 67A that is arranged along part of the outer periphery of the centrifugal base 63. A groove 67b extending along the circumferential direction of the centrifugal base 63 is formed in the collision receiving portion 67A. The collision portion 68 and the shock absorbing material 69 are arranged side by side along the circumferential direction of the centrifugal base 63 on the collision receiving portion 67A. The shock absorbing material 69 is made of an elastic material. Therefore, the shock absorbing material 69 is configured to return to its original shape even if it is crushed by the collision portion 68. A collision pin 68A is fixed to the collision portion 68, and the collision pin 68A is inserted into the groove 67b of the collision receiving portion 67A.

[0062] If the user accidentally releases the grip attached to the grip attachment portion 37D, the rope 37 is wound around the rope winding pulley 33 at high speed. The first gear 41, which is fixed to the rope winding pulley 33 via the first mainspring case 32A, and the second gear 44, which meshes with the first gear 41, rotate clockwise in FIG. 12 at high speed. Therefore, the centrifugal base 63, which is fixed to the second gear 44, also rotates clockwise in FIG. 17 at high speed. As a result, a centrifugal force greater than the tensile force of each centrifugal spring 66 acts on each protruding pin 65, causing each protruding pin 65 to protrude outward from the outer circumferential surface of the centrifugal base 63, as shown in FIG. 17(b). The protruding protruding pin 65 collides with the collision portion 68 of the stopper portion 62. Due to the collision of the protruding pin 65, the collision portion 68 slides toward the shock absorbing material 69, and the shock is absorbed by the shock absorbing material 69.

[0063] As a result, the rotation of the centrifugal base 63 stops, the rotation of the second gear 44 to which the centrifugal base 63 is fixed stops, the rotation of the first gear 41 meshing with the second gear 44 stops, the rotation of the rope winding pulley 33 stops, and the retraction of the rope 37 stops. With the protruding pin 65 protruding from the centrifugal base 63 and in contact with the collision portion 68 of the stopper portion 62, by slightly pulling out the rope 37, the protruding pin 65 returns to its original position by the force of the centrifugal spring 66.

[0064] The muscle training device 101 includes a base 31A, a first spiral spring 32 and a second spiral spring 42 provided on the base 31A, and a rope 37 having a first end 37A connected to the first spiral spring 32 and a second end 37B located opposite the first end 37A. The first spiral spring 32 and the second spiral spring 42 are configured to apply an elastic force to the rope 37 that resists the tensile force when the second end 37B is pulled. With this configuration, the first spiral spring 32 and the second spiral spring 42 can increase the load on the user of the muscle training device 101.

[0065] The muscle training device 101 further includes a load switching unit 50 that can switch so that an elastic force that resists a tensile force is generated in only the first spiral spring 32 or in both the first spiral spring 32 and the second spiral spring 42. The load switching unit 50 has a switching lever 53 and a switching gear 55. The switching gear 55 is fixed to a second shaft 70 to which the center portion 42A of the second spiral spring 42 is fixed. The switching lever 53 meshes with the switching gear 55, rendering the switching gear 55 non-rotatable, rendering the center portion 42A of the second spiral spring 42 non-rotatable, thereby rendering the second spiral spring 42 capable of being wound up. The switching lever 53 also disengages from the switching gear 55, rendering the switching gear 55 rotatable, rendering the center portion 42A of the second spiral spring 42 rotatable together with the second shaft 70, thereby rendering the second spiral spring 42 non-windable.

[0066] The muscle training device 101 has the same effects as the muscle training device 1. Furthermore, the above-described configuration of the switching lever 53 and the switching gear 55 allows the load to be switched according to the user's needs, thereby improving the usability of the muscle training device 101.

[0067] The muscle training device 101 further includes an emergency stop unit 60 that stops the rope 37 from being pulled back when the rope 37 is pulled back without the user's force acting on it due to the elastic force generated in the first spiral spring 32 and the second spiral spring 42 and applied to the rope 37. The emergency stop unit 60 includes a rotating unit 61 that rotates due to the elastic force and a stopper unit 62 that stops the rotation of the rotating unit 61. The rotating unit 61 has a protruding pin 65 that protrudes outward from the rotating unit 61 due to the rotation caused by the elastic force. The stopper unit 62 is configured to stop the rotation of the rotating unit 61 by the protruding pin 65 protruding outward from the rotating unit 61 hitting the stopper unit 62, thereby stopping the rope 37 from being pulled back.

[0068] With this configuration, when the user releases the grip attached to the grip attachment portion 37D, the rope 37 can be stopped from being wound up, thereby preventing damage to the main body 130 of the muscle training device 101.

[0069] 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.

[0070] The flat plate 10 may be foldable. The main bodies 30, 130 are provided at the corners 15, 16 of the flat plate 10, but may be provided at locations other than the corners 15, 16, such as the center of the flat plate 10, so as to be attachable and detachable. The flat plate 10 is generally rectangular in plan view, but may have other shapes, such as a trapezoidal shape. While two spiral springs 32, 42 are provided inside the main body 130 of the second embodiment, more spiral springs may be added to achieve a higher load configuration. The emergency stop unit 60 is provided below the load increasing unit 40, but it may be provided below the rope winding pulley 33 or on the main body 30 of the muscle training device 1 of the first embodiment. [Explanation of symbols]

[0071] 1. 101 Muscle training equipment 10 flat plate 10a Pin insertion hole, 10B Top surface 11 first side portion, 12 second side portion, 13 third side portion, 14 fourth side portion 15 1st corner, 16 2nd corner, 17 3rd corner, 18 4th corner 19 Handle 20 Mounting part 21 fixed portion, 22 first plate, 22a gap 30, 130 main body 31 Case 31A base part, 31B cover part, 31C bottom surface, 31D second plate 31e gap, 31F opening 32 First mainspring 32A Mainspring case, 32B First shaft, 32C Center 32D outer end 33 Pulley 33a groove, 33B wall 34 Guide roller 34A Roller shaft 35 Drawing pulley 36A, 36B, 36C Pull-out rollers 37 Rope 37A first end, 37B second end, 37C connection portion, 37D Grip mounting part 38 Fixed part 38A Lock switch, 38B Lock pin, 38C Lock spring 40 Load increase section 41 First Gear 42 Second mainspring 42A center, 42B outer edge 42 Second mainspring 43 Second mainspring case 44 2nd Gear 50 Load switching unit 51 Push Latch 51A support base, 51B latch case, 51C pressing moving part 52 Link board 52A shaft 53 Switching lever 53A Rotating shaft, 53b Groove, 53C Protrusion 54 Switching spring 55 Switching gear 60 Emergency stop section 61 Rotating part 63 centrifugal base, 63a slit, 64 guide pin, 65 protruding pin 62 Stopper part 67 Support part 67A Collided part, 67b Groove 68 Collision part 68A Collision Pin 69 Shock absorber 70 Second Shaft

Claims

1. 1. A muscle training device comprising: a flat surface for a user to stand on; a body that is attachable to and detachable from the flat plate; The body includes: A base portion; an elastic body provided on the base portion; a string having a first end connected to the elastic body and a second end located opposite the first end, The elastic body is configured to impart an elastic force to the string that resists a tensile force when the second end is pulled, The main body is provided in two pieces, the flat plate has a side portion extending in a predetermined direction, The two main bodies are attached and detached to both ends of the side portion, respectively, and the area of ​​the flat plate other than the both ends of the side portion is an area on which a user can stand.

2. the flat plate includes a mounting portion to which the main body is attached, the mounting portion has a first plate provided with a gap between it and a surface of the flat plate, the main body includes a second plate provided on a lower surface side of the base portion with a gap between the second plate and the lower surface, 2. The muscle training device of claim 1, wherein the second plate of the body is configured to slide under the first plate by sliding the body relative to the mounting portion of the flat plate, thereby preventing the body from moving away from the mounting portion.

3. The muscle training device of claim 2 , wherein the second plate of the body is configured to slide under the first plate by rotating the body.

Images