Muscle strength training device

Abstract

Provided is a muscle strength training device capable of adjusting an applied load to a desired value or a constant value. This muscle strength training device is provided with: an operation unit to which a user applies force to perform muscle strength training; a calculation control unit; the load sensor is electrically connected with the computing control part and is used for detecting the load of the operation part; the movement amount sensor is electrically connected with the computing control part and detects the movement amount of the operation part; and a load generation unit that generates a load applied to the operation unit by the control of the computing control unit. The calculation control unit is configured so as to store, as a correction value, a load detection value of the load sensor corresponding to a movement amount detection value of the movement amount sensor when the force of the user is not applied to the operation unit, and to store, as the correction value, the load detection value of the load sensor corresponding to the movement amount detection value of the movement amount sensor when the force of the user is not applied to the operation unit. The self-load generation unit generates a corrected load value obtained by correcting the required load value with a correction value corresponding to the movement amount detection value of the movement amount sensor at that time.

Description

Technical Field

[0001] The present invention relates to a muscle training device for efficiently training muscles by applying a load to a user. Background Art

[0002] When elderly people perform muscle strength training, the decrease in muscle strength is greater than that of healthy people, so it is desirable to configure the machine to always apply a uniform and light load regardless of the operating state of the machine. For example, in a chest press machine, when the user applies force to push the bar forward, it is necessary to exert a force equal to the normal load plus the weight of the bar, and when the bar is pulled forward, it becomes a movement of a lighter force equal to the normal load minus the weight of the bar, so it is required to control the load to offset it.

[0003] Therefore, in the previous muscle training device, weights are installed to keep balance like a seesaw, and the applied load is uniformed. However, in the case of this structure, larger weights need to be installed according to the shape of the rod, which requires a wider space.

[0004] Patent document 1 describes a sports equipment, which includes: a load adjustment rod, one end of which is rotatably connected to the front part of a frame; a load belt, which is movably connected to the load adjustment rod; and a hydraulic actuator, one end of which is rotatably connected to the load adjustment belt and the other end of which is rotatably connected to the rear part of the frame. According to this sports equipment, the applied weight can be adjusted by using the "lever" principle of the hydraulic actuator without using a weight plate.

[0005] [Prior art literature]

[0006] [Patent Document]

[0007] [Patent Document 1] Japanese Patent No. 6442052. Summary of the invention

[0008] [Problems that the invention aims to solve]

[0009] The sports equipment described in Patent Document 1 can provide a small muscle training device because it does not use weight plates. However, in order to adjust and even the applied load according to the operating state, weights still need to be installed, resulting in a larger overall size and requiring a wider space.

[0010] Therefore, an object of the present invention is to provide a muscle training device that can adjust the applied load to a desired value without increasing the overall size.

[0011] Another object of the present invention is to provide a muscle training device that can adjust the applied load to a uniform value without increasing the overall size.

[0012] [Methods of solving the problem]

[0013] According to the present invention, a muscle strength training device comprises: an operating part, which is used by a user to apply force to perform muscle strength training; an operation control part; a load sensor, which is electrically connected to the operation control part and detects the load of the operating part; a movement amount sensor, which is electrically connected to the operation control part and detects the movement amount of the operating part; and a load generating part, which generates the load applied to the operating part through the control of the operation control part; the operation control part is constructed as follows, that is, the load detection value of the load sensor corresponding to the movement amount detection value of the movement amount sensor when the user's force is not applied to the operating part is pre-stored as a correction value, and when the user applies force to the operating part, a corrected load value is generated from the load generating part by correcting the required load value with the correction value corresponding to the movement amount detection value of the movement amount sensor at this time.

[0014] The calculation control unit stores in advance the load detection value of the load sensor corresponding to the movement amount of the movement amount sensor when the user's force is not applied to the operating part (rod, arm, pad, seat cushion, backrest) as a correction value. When the user applies force to the operating part, the correction value stored corresponding to the movement amount of the movement amount sensor is read, and the required load value is corrected by the read correction value, and the load generating unit generates a corrected load value compensated by offsetting. Since the required load value is corrected and compensated by the correction value, the load of the operating part can be correctly adjusted to the originally required value, and the load can also be adjusted to a constant value. Of course, since there is no need to set weights, the overall size will not increase.

[0015] The calculation control unit is preferably configured so as to generate the load from the load generating unit at a required load value that becomes a predetermined constant value even when the movement amount detected by the movement amount sensor changes.

[0016] The calculation control unit is also preferably configured so as to generate the load from the load generating unit using a required load value that changes according to the amount of movement detected by the movement sensor.

[0017] It is also preferred that the operating part is a rod or pad that rotates in the up-down direction or the front-back direction by the force applied by the user, and the movement amount sensor is an angle sensor that detects the rotation angle of the rod or pad. As the muscle training device, the shoulder press machine of the first embodiment, the chest press machine of the second embodiment, and the leg curl machine of the third embodiment meet the requirements.

[0018] It is also preferred that the operating part is a seat cushion and a backrest that move in the front-rear direction by the force applied by the user, and the movement amount sensor is an angle sensor that detects the rotation angle of the arm connected to the seat cushion and the backrest. As the muscle training device, the leg press machine of the fourth embodiment meets the requirements.

[0019] It is also preferred that the operating part is a rod or pad that rotates in the left-right direction by the force applied by the user, and the movement amount sensor is an angle sensor that detects the rotation angle of the rod or pad. As the muscle training device, the rotation training device of the fifth embodiment and the hip adduction machine of the sixth embodiment are suitable.

[0020] It is also preferred that the operating part is an arm and a backrest that rotate in the front-rear direction by the force applied by the user, and the movement amount sensor is an angle sensor that detects the rotation angle of the arm and the backrest. As this muscle training device, the abdominal and back training machine of the seventh embodiment meets the requirements.

[0021] It is also preferred that the load generating unit is an electromagnetic resistance actuator that converts the rotational force of the motor into linear motion to generate the load, a hydraulic actuator that uses oil pressure to generate the load, an air pressure actuator that uses air pressure to generate the load, or an electric assist actuator that uses an electronically controlled cylinder and a speed controller to generate the load.

[0022] [Effects of the Invention]

[0023] According to the present invention, since the detection value of the load sensor is corrected by the correction value and compensation is performed by offsetting, the load of the operating part can be correctly adjusted to a desired value, and the load can also be adjusted to a constant value. Of course, since there is no need to set a weight, the overall size will not increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a side view schematically showing the structure of a shoulder press machine as a first embodiment of the muscle training device of the present invention.

[0025] Figure 2 This is a side view for explaining the structure and usage of the shoulder press machine according to the first embodiment.

[0026] Figure 3 This is a block diagram schematically showing the electrical configuration of each component in the first embodiment.

[0027] Figure 4 This is a flowchart for explaining the flow of the initial setting operation of the calculation control unit in the first embodiment.

[0028] Figure 5 This is a flowchart for explaining the flow of normal operation of the calculation control unit in the first embodiment.

[0029] Figure 6 It is a side view schematically showing the structure of a chest press machine as a second embodiment of the muscle training device of the present invention.

[0030] Figure 7This is a side view for explaining the structure and usage of the chest press machine according to the second embodiment.

[0031] Figure 8 This is a side view schematically showing the structure of a leg curl machine as a third embodiment of the muscle training device of the present invention.

[0032] Fig. 9 This is a side view for explaining the structure and usage of the leg curling machine according to the third embodiment.

[0033] Fig.10 It is a side view schematically showing the structure of a leg press machine as a fourth embodiment of the muscle training device of the present invention.

[0034] Fig.11 This is a side view for explaining the structure and usage of the leg press machine according to the fourth embodiment.

[0035] Fig.12 It is a side view schematically showing the structure of a rotation training device as a fifth embodiment of the muscle training device of the present invention.

[0036] Fig.13 It is a front view schematically showing the structure of the turning training device according to the fifth embodiment.

[0037] Fig.14 This is a side view for explaining the structure and usage of the turning training device according to the fifth embodiment.

[0038] Fig.15 This is a side view schematically showing the structure of a hip adduction machine as a sixth embodiment of the muscle training device of the present invention.

[0039] Fig.16 This is a side view for explaining the structure and usage of the hip adduction machine according to the sixth embodiment.

[0040] Fig.17 It is a bottom view schematically showing the structure of a hip adduction machine according to a sixth embodiment.

[0041] Fig.18 It is a side view schematically showing the structure of the abdominal and back training machine as the seventh embodiment of the muscle training device of the present invention.

[0042] Fig.19 This is a side view for explaining the structure and usage of the abdominal and back training machine according to the seventh embodiment.

[0043] Description of Reference Numerals

[0044] 10, 110, 210, 310, 410, 510, 610: Frame

[0045] 11, 111, 211, 311, 411, 511, 611: Seat cushion

[0046] 12, 112, 212, 312, 512, 612: backrest

[0047] 13, 113: A pair of poles

[0048] 14, 114, 614: Rotating components

[0049] 14a, 15a, 114a, 115a, 614a, 615a: Axis

[0050] 15, 115, 215, 315, 415, 515, 615: Electric linear actuators

[0051] 16, 116, 216, 316, 416, 516, 616: Load sensors

[0052] 17, 117, 217, 317, 417, 517, 617: Angle sensors

[0053] 18, 118, 218, 318, 418, 518, 618: Load setting unit

[0054] 19, 119: Operation control unit

[0055] 19a: Storage

[0056] 20, 120, 220, 320, 420, 520, 620: User

[0057] 213, 513: Two pairs of pads

[0058] 214a: Arm 1

[0059] 214b: Arm 2

[0060] 214c: Arm 3

[0061] 214d: Connecting parts

[0062] 313: Movable components

[0063] 314a: Sliding member

[0064] 314b, 613: Arm

[0065] 321: Foot pedal

[0066] 413: A pair of rods or arms

[0067] 414a: First rotating member

[0068] 414b: Second rotating member

[0069] 414c: The third rotating member

[0070] 514a: A pair of arms

[0071] 514b: A pair of rotating members

[0072] 514c: A pair of connecting members. DETAILED DESCRIPTION

[0073] Figure 1 The structure of a shoulder press machine is schematically shown as a first embodiment of the muscle training device of the present invention. Figure 2 The structure and usage of the shoulder press machine of this embodiment will be described.

[0074] like Figure 1 As shown in the figure, a seat cushion 11 and a backrest 12 for a user to sit on are fixed to a fixed member, i.e., a frame 10. The front ends of a pair of rods or handles (corresponding to the operating part of the present invention) 13 for the user to apply force to perform muscle training are free ends, and their base ends are fixed to a rotating member 14 as a whole. The pair of rods 13 are configured to rotate in the vertical direction around the axis 14a of the rotating member 14 as the center by the force applied by the user. One end of an electric linear actuator (corresponding to the load generating part of the present invention) 15 that generates a load for the pair of rods 13 is connected to the rotating member 14, and the other end of the electric linear actuator 15 is rotatably mounted on the frame 10 around the axis 15a as the center. A load sensor 16 that detects the load applied to the pair of rods 13 is mounted on the mounting portion of the electric linear actuator 15 on the axis 15a, and an angle sensor (corresponding to the movement amount sensor of the present invention) 17 that detects the rotation angle of the electric linear actuator 15 is assembled to the electric linear actuator 15. The frame 10 is provided with a load setting unit 18 for setting a load to be applied by a user to the pair of rods 13. The load setting unit 18 is provided with a calculation control unit 19 described below.

[0075] like Figure 2 As shown, regarding the shoulder press machine of this embodiment, the user 20 holds the pair of bars 13 with both hands, pushes the pair of bars 13 upward to the top of the head and straightens the arms, and pulls the pair of bars 13 downward to return to the original position to perform training.

[0076] Figure 3 The electrical configuration of each component in this embodiment is schematically shown. Figure 3As shown, the load sensor 16 is electrically connected to the calculation control unit 19, and is configured to detect the load value applied to the pair of rods 13, that is, load data, and send it to the calculation control unit 19. The angle sensor 17 is electrically connected to the calculation control unit 19, and is configured to detect the rotation angle of the electric linear actuator 15 and then the angle value of the rotation angle of the pair of rods 13, that is, angle data, and send it to the calculation control unit 19. The electric linear actuator 15 is electrically connected to the calculation control unit 19, and is configured to generate the load applied to the pair of rods 13 according to the load data received from the calculation control unit 19. The load setting unit 18 is electrically connected to the calculation control unit 19, and is configured to send the set load (required load) of the pair of rods 13 to the calculation control unit 19. The calculation control unit 19 includes a programmable computer and a memory, and includes a storage unit 19a that stores the load setting value, load data, angle data, and load correction value.

[0077] The electric linear actuator 15 is an electromagnetic resistance actuator that converts the rotational force of the motor into linear motion to generate a load, and is a linear actuator that generates a load applied to the pair of rods 13 according to the value indicated by the calculation control unit 19. Such electric linear actuators are commercially available, and in this embodiment, the TA6 series linear actuators of TiMOTION Technology are used. Instead of the electric linear actuator, a hydraulic actuator that generates a load using oil pressure, an air pressure actuator that generates a load using air pressure, or an electric auxiliary actuator that generates a load using an electronically controlled cylinder and a speed controller can also be used.

[0078] The load sensor 16 is constituted by a force gauge using a strain gauge, for example, and the detected load is sent to the calculation control unit 19. Such a force gauge is commercially available, and in this embodiment, an S-shaped general-purpose force gauge LC1205 series manufactured by AND Co., Ltd. is used.

[0079] The angle sensor 17 is composed of, for example, a Hall sensor using a spindle sensor or a Hall element, and the detected rotation angle is sent to the calculation control unit 19. Such Hall sensors are commercially available, and in this embodiment, a Hall sensor assembled in an electric linear actuator of TiMOTION Technology is used. As a movement amount sensor, a sensor that detects a linear movement distance can be provided instead of an angle sensor.

[0080] Figure 4 The flow of the initial setting operation of the calculation control unit 19 is described. Figure 5 The flow of normal operation of the calculation control unit 19 will be described.

[0081] First, if Figure 4As shown, as an initial setting operation, the calculation control unit 19 obtains the load data detected by the load sensor 16 for a series of angle data detected by the angle sensor 17 when the pair of rods 13 are rotated as correction data in a state where the user's force is not applied to the pair of rods 13, and stores the correction data in the storage unit 19a corresponding to each angle of the angle sensor 17 (step S1). Table 1 shows an example of correction data of the load for each angle stored in the storage unit 19a. The weight of the pair of rods 13 at each measured angle is also shown for reference. The angle of the rod shown here is 0° when the front end of the rod is in the horizontal direction and 90° when it is in the vertical direction.

[0082] [Table 1]

[0083] Angle of rod (°) Correction data of load (kg) Weight of rod (kg) 5 4.37 1.24 10 4.65 1.30 15 4.47 1.26 20 4.38 1.28 25 4.23 1.25 30 4.18 1.37 35 4.10 1.18 40 4.02 1.11 45 3.93 1.03 50 3.82 0.95 55 3.71 0.90 60 3.67 0.86 65 3.51 0.74 70 3.25 0.71 75 3.26 0.63 80 2.98 0.54 85 3.10 0.45 90 3.00 0.31

[0084] As a normal operation of the shoulder press machine of this embodiment, when a user applies force to the pair of bars 13, Figure 5 As shown, the calculation control unit 19 imports the detection value of the rotation angle of the pair of rods 13 at this time from the angle sensor 17 (step S11). Then, the calculation control unit 19 reads the load correction value corresponding to the angle detection value of the angle sensor 17 from the storage unit 19a (step S12), and corrects the required load value set by the load setting unit 18 with the read load correction value (step S13). Thereafter, the calculation control unit 19 controls the electric linear actuator 15 in a manner that generates a load corresponding to the corrected load value (step S14). In the present embodiment, the required load value is a certain load value pre-set by the load setting unit 18. However, in a variant scheme, the required load value may be a load value that changes according to the angle detection value of the angle sensor 17.

[0085] For example, if the required load value set by the load setting unit 18 is 35 kg, and the angle detection value of the angle sensor 17 for the pair of rods 13 is 40°, the load correction value is 4.02 kg according to Table 1. Therefore, the corrected load value when the angle is 40° is 35 kg + 4.02 kg = 39.02 kg, and the electric linear actuator 15 is instructed to generate this load. As a result, the electric linear actuator 15 generates this load (39.02 kg). The electric linear actuator 15 can be feedback-controlled so that the load value detected by the load sensor 16 becomes this load (39.02 kg).

[0086] Thus, according to the present embodiment, the load detection value of the load sensor 16 corresponding to the angle detection value of the angle sensor 17 when the user's force is not applied to the pair of rods 13 is stored in advance as a load correction value. When the user applies force to the pair of rods 13, the load correction value stored corresponding to the angle detection value of the angle sensor 17 is read, and the electric linear actuator 15 is instructed to generate a load obtained by correcting the set required load value with the read load correction value. Since the correction is performed with the load correction value, a load compensated by offset is generated, and thus the weight of the rod or the friction resistance of the mechanical movement can be eliminated, and the load of the operating portion can be accurately adjusted to the original required value. That is, the load can be adjusted to a constant value or an original required value.

[0087] Furthermore, in the present embodiment, the initial setting action of the shoulder press machine may be first performed each time the shoulder press machine is used to obtain and store correction data, or may be performed only once when the shoulder press machine is used for the first time to obtain and store correction data, or may be performed when the shoulder press machine is used multiple times or for a predetermined period of time to obtain and store correction data, or may be performed when instructed by the user of the shoulder press machine to obtain and store correction data, or may be performed in advance on the shoulder press machine at the time of manufacturing to allow shoulder press machines of the same structure to store the same correction data.

[0088] Figure 6 The structure of a chest press machine is schematically shown as a second embodiment of the muscle training device of the present invention. Figure 7 The configuration and usage of the chest press machine of this embodiment will be described.

[0089] like Figure 6As shown, a seat cushion 111 and a backrest 112 for a user to sit on are fixed to a fixed member, i.e., a frame 110. The front ends of a pair of rods or handles (corresponding to the operating portion of the present invention) 113 for the user to apply force to perform muscle training are free ends, and their base ends are integrally fixed to a rotating member 114. The pair of rods 113 are configured to rotate along the front-back direction around the axis 114a of the rotating member 114 as the center by the force applied by the user. One end of an electric linear actuator (corresponding to the load generating portion of the present invention) 115 that generates a load for the pair of rods 113 is connected to the rotating member 114, and the other end of the electric linear actuator 115 is rotatably mounted on the frame 110 around the axis 115a as the center. A load sensor 116 for detecting the load applied to the pair of rods 113 is mounted on the mounting portion of the pair of shafts 115a of the electric linear actuator 115, and an angle sensor (corresponding to the movement amount sensor of the present invention) 117 for detecting the rotation angle of the electric linear actuator 115 is assembled to the electric linear actuator 115. A load setting portion 118 for setting the load to be applied to the pair of rods 113 by the user is provided on the frame 110. The load setting portion 118 is provided with a calculation control portion similar to that in the case of the first embodiment.

[0090] like Figure 7 As shown, regarding the chest press machine of this embodiment, the user 120 holds the pair of bars 113 with both hands, pushes the pair of bars 113 forward and stretches the arms, and pulls the pair of bars 113 back to the original position to perform training.

[0091] The other configurations and operations of the calculation control unit in this embodiment are the same as those in the first embodiment, and thus detailed descriptions thereof are omitted.

[0092] According to the present embodiment, the load detection value of the load sensor 116 corresponding to the angle detection value of the angle sensor 117 when the user's force is not applied to the pair of rods 113 is stored in advance as a load correction value. When the user applies force to the pair of rods 113, the load correction value stored corresponding to the angle detection value of the angle sensor 117 is read, and the electric linear actuator 115 is instructed to generate a load obtained by correcting the set required load value with the read load correction value. Since the correction is performed with the load correction value, a load compensated by offset is generated, and the weight of the rod or the friction resistance of the mechanical movement can be eliminated, and the load of the operating part can be accurately adjusted to the original required value. That is, the load can be adjusted to a constant value or the original required value.

[0093] Figure 8 The structure of a leg curl machine is schematically shown as a third embodiment of the muscle training device of the present invention. Fig. 9 The structure and usage of the leg curling machine according to this embodiment will be described.

[0094] like Figure 8 As shown, a seat cushion 211 and a backrest 212 for a user to sit on are fixed to a fixed member, i.e., a frame 210. Two pairs of pads (corresponding to the operating portion of the present invention) 213 for the user to insert their feet and apply force to perform muscle training are connected to the front end of the first arm 214a, which becomes a free end, and the base end of the first arm 214a is pivotally supported on the frame 210. Thus, by the user applying force to the two pairs of pads 213, the first arm 214a is configured to rotate in the vertical direction with the pivot support as the center. One end of the second arm 214b is pivotally supported in the middle of the first arm 214a. The other end of the second arm 214b is pivotally supported on one end of the third arm 214c, and the other end of the third arm 214c is pivotally supported on the frame 210. One end of an electric linear actuator (corresponding to the load generating portion of the present invention) 215 for generating a load is connected to the third arm 214c via a connecting member 214d, and the other end of the electric linear actuator 215 is fixed to the frame 210, although not shown. Although not shown, a load sensor for detecting the load applied to the two pairs of pads 213 is installed at the mounting portion of the electric linear actuator 215 to the frame 210, and an angle sensor (corresponding to the movement amount sensor of the present invention) for detecting the rotation angle of the electric linear actuator 215 is assembled to the electric linear actuator 215. A load setting portion 218 for the user to set the load is provided on the frame 210. The same operation control portion as in the first embodiment is provided in the portion of the load setting portion 218.

[0095] like Fig. 9 As shown, in the leg curling machine of this embodiment, the user 220 stretches both feet clamped between the operating portion, namely the two pairs of pads 213, until they become horizontal, maintains this state for several seconds, and then bends to the original position, thereby performing training.

[0096] The other configurations and operations of the calculation control unit in this embodiment are the same as those in the first embodiment, and thus detailed descriptions thereof are omitted.

[0097] According to the present embodiment, the load detection value of the load sensor corresponding to the angle detection value of the angle sensor when the user's force is not applied to the two pairs of pads 213 is stored in advance as a load correction value. When the user applies force to the two pairs of pads 213, the load correction value stored corresponding to the angle detection value of the angle sensor is read, and the electric linear actuator 215 is instructed to generate a load obtained by correcting the set required load value with the read load correction value. Since the correction is performed with the load correction value, a load compensated by offset is generated, and the weight of the rod or the friction resistance of the mechanical movement can be eliminated, and the load of the operating part can be accurately adjusted to the original required value. That is, the load can be adjusted to a constant value or the original required value.

[0098] Fig.10 The structure of the leg press machine is schematically shown as a fourth embodiment of the muscle training device of the present invention. Fig.11 The structure and usage of the leg press machine according to this embodiment will be described.

[0099] like Fig.10 As shown, a sliding member 314a that slides along a fixed member, i.e., a frame 310, is pivotally supported by a movable member 313. One end of an arm 314b is rotatably connected to the frame 310, and the other end of the arm 314b is pivotally supported by the movable member 313. A seat cushion 311 and a backrest 312 for a user to sit on are fixed to the movable member 313. A footrest 321 is fixed to the frame 310. When the user steps on the footrest 321 with both feet to perform muscle training, a force is applied to the seat cushion 311 and the backrest 312 (corresponding to the operating part of the present invention), and the movable member 313 and the sliding member 314a move along the frame 310. Thus, the arm 314b is configured to rotate around one end thereof. One end of an electric linear actuator (corresponding to the load generating part of the present invention) 315 that generates a load is pivotally supported in the middle of the arm 314b, and the other end of the electric linear actuator 315 is rotatably mounted on the frame 310. A load sensor 316 for detecting the load applied to the seat cushion 311 and the backrest 312 is mounted on the mounting portion of the electric linear actuator 315 on the frame 310, and an angle sensor (corresponding to the movement amount sensor of the present invention) 317 for detecting the rotation angle of the electric linear actuator 315 is assembled on the electric linear actuator 315. A load setting portion 318 for the user to set the load is provided on the frame 310. The load setting portion 318 is provided with a calculation control portion similar to that of the first embodiment.

[0100] like Fig.11 As shown, in the leg press machine of this embodiment, a user 320 steps on a foot pedal 321 to move a seat cushion 311 and a backrest 312 as operating parts rearward to perform training.

[0101] The other configurations and operations of the calculation control unit in this embodiment are the same as those in the first embodiment, and thus detailed descriptions thereof are omitted.

[0102] According to the present embodiment, the load detection value of the load sensor 316 corresponding to the angle detection value of the angle sensor 317 when the user's force is not applied to the seat cushion 311 and the backrest 312 is stored in advance as a load correction value. When the user applies force to the seat cushion 311 and the backrest 312, the load correction value stored corresponding to the angle detection value of the angle sensor 317 is read, and the electric linear actuator 315 is instructed to generate a load obtained by correcting the set required load value with the read load correction value. Since the correction is performed with the load correction value, a load compensated by offset is generated, and the weight of the seat cushion or backrest, movable member or sliding member or the friction resistance of the mechanical movement can be eliminated, and the load set to the operating part can be correctly adjusted to the original required value. That is, the load can be adjusted to a constant value or the original required value.

[0103] Fig.12 and Fig.13 The structure of the rotation training device is schematically shown as a fifth embodiment of the muscle training device of the present invention. Fig.14 The structure and usage of the turning training device of this embodiment will be described.

[0104] like Fig.12 and Fig.13 As shown, a seat cushion 411 for a user to sit on is fixed to a fixed member, i.e., a frame 410. The front end of a pair of rods or arms (corresponding to the operating portion of the present invention) 413 for the user to apply force to perform muscle strength training is a free end, and their base ends are integrally fixed to the first rotating member 414a. The first rotating member 414a is fixed to the second rotating member 414b, and the second rotating member 414b is further fixed to the third rotating member 414c. If the user applies force to the pair of rods or arms 413 to perform muscle strength training, the first rotating member 414a, the second rotating member 414b, and the third rotating member 414c rotate together. One end of an electric linear actuator (corresponding to the load generating portion of the present invention) 415 that generates a load is axially supported on the third rotating member 414c, and the other end of the electric linear actuator 415 is mounted on the frame 410. A load sensor 416 for detecting the load applied to the pair of rods 413 is mounted on the mounting portion of the electric linear actuator 415 on the frame 410, and an angle sensor (corresponding to the movement amount sensor of the present invention) 417 for detecting the rotation angle of the electric linear actuator 415 is assembled on the electric linear actuator 415. A load setting portion 418 for the user to set the load is provided on the frame 410. The same calculation control portion as in the first embodiment is provided on the portion of the load setting portion 418.

[0105] like Fig.14As shown, regarding the rotation training device of this embodiment, the user 420 holds a pair of rods or arms 413 as operating parts with both hands, twists the pair of rods or arms 413 to the left and right, returns to the original position and twists to the opposite side, thereby performing training.

[0106] The other configurations and operations of the calculation control unit in this embodiment are the same as those in the first embodiment, and thus detailed descriptions thereof are omitted.

[0107] According to the present embodiment, the load detection value of the load sensor 416 corresponding to the angle detection value of the angle sensor 417 when the user's force is not applied to the pair of rods or arms 413 is stored in advance as a load correction value. When the user applies force to the pair of rods or arms 413, the load correction value stored corresponding to the angle detection value of the angle sensor 417 is read, and the electric linear actuator 415 is instructed to generate a load obtained by correcting the set required load value with the read load correction value. Since the correction is performed with the load correction value, a load compensated by offset is generated, and the friction resistance of the mechanical movement of the rod or arm can be eliminated, and the load of the operating part can be accurately adjusted to the original required value. That is, the load can be adjusted to a constant value or the original required value.

[0108] Fig.15 and Fig.16 The structure of the hip adduction machine is schematically shown as a sixth embodiment of the muscle training device of the present invention. Fig.17 The configuration and usage of the hip adduction machine according to this embodiment will be described.

[0109] like Fig.15 and Fig.16As shown, a seat cushion 511 and a backrest 512 for a user to sit on are fixed to a fixed member, i.e., a frame 510. Two pairs of pads (corresponding to the operating part of the present invention) 513 for the user to insert their feet and apply force to perform muscle training are respectively connected to the front end of a pair of arms 514a that become free ends, and the base ends of the pair of arms 514a are respectively connected to a pair of rotating members 514b. Thus, by the user applying force to the two pairs of pads 513, the pair of arms 514a and the pair of rotating members 514b are configured to rotate in the left and right directions respectively. One end of a pair of electric linear actuators (corresponding to the load generating part of the present invention) 515 that generate loads is connected to the pair of rotating members 514b via a pair of connecting members 514c, and the other ends of these electric linear actuators 515 are respectively fixed to the frame 510. Load sensors 516 for detecting the loads applied to the two pairs of pads 513 are mounted on the mounting portions of the pair of electric linear actuators 515 on the frame 510, respectively, and angle sensors (corresponding to the movement amount sensors of the present invention) 517 for detecting the rotation angles of the electric linear actuators 515 are assembled on the electric linear actuators 515. A load setting portion 518 for the user to set the load is provided on the frame 510. The load setting portion 518 is provided with a calculation control portion similar to that of the first embodiment.

[0110] like Fig.17 As shown, with the hip adduction machine of this embodiment, the user 520 performs training by closing both legs sandwiched between two pairs of pads 513 as an operation portion toward the center and opening them to the original position.

[0111] The other configurations and operations of the calculation control unit in this embodiment are the same as those in the first embodiment, and thus detailed descriptions thereof are omitted.

[0112] According to the present embodiment, the load detection value of the load sensor 516 corresponding to the angle detection value of the angle sensor 517 when the user's force is not applied to the two pairs of pads 513 is stored in advance as a load correction value. When the user applies force to the two pairs of pads 513, the load correction value stored corresponding to the angle detection value of the angle sensor 517 is read, and the pair of electric linear actuators 515 are instructed to generate a load obtained by correcting the set required load value with the read load correction value. Since the correction is performed with the load correction value, a load compensated by offset is generated, and the friction resistance of the mechanical movement of the pad or the arm can be eliminated, and the load of the operating part can be accurately adjusted to the original required value. That is, the load can be adjusted to a constant value or the original required value.

[0113] Fig.18 The structure of the abdominal and back training machine is schematically shown as the seventh embodiment of the muscle training device of the present invention. Fig.19The configuration and usage of the abdominal and back training machine of this embodiment will be described.

[0114] like Fig.18 As shown, a seat cushion 611 for a user to sit on is fixed to a fixed member, i.e., a frame 610. An arm (corresponding to the operating portion of the present invention) 613 for the user to apply force to perform muscle strength training is connected to a rotating member 614 in an angle-adjustable manner. The rotating member 614 is rotatably mounted on the frame 610 around an axis 614a. In addition, a backrest 612 is mounted on the rotating member 614. Thus, the arm 613 and the backrest 612 are configured to rotate in the up-down direction around the axis 614a of the rotating member 614 as a center by the user applying force. One end of an electric linear actuator (corresponding to the load generating portion of the present invention) 615 for generating a load for the arm 613 is connected to the rotating member 614, and the other end of the electric linear actuator 615 is rotatably mounted on the frame 610 around an axis 615a. A load sensor 616 for detecting the load applied to the arm 613 is mounted on the mounting portion of the electric linear actuator 615 for the shaft 615a, and an angle sensor (corresponding to the movement amount sensor of the present invention) 617 for detecting the rotation angle of the electric linear actuator 615 is assembled to the electric linear actuator 615. A load setting portion 618 for allowing a user to set the load to be applied to the arm 613 is provided on the frame 610. The load setting portion 618 is provided with a calculation control portion similar to that of the first embodiment.

[0115] like Fig.18 As shown, regarding the abdominal and back training machine of this embodiment, the user 620 holds the arm 613 as the operating part with both hands, leans the upper body forward, and pushes the backrest to return to the original position, thereby performing training.

[0116] The other configurations and operations of the calculation control unit in this embodiment are the same as those in the first embodiment, and thus detailed descriptions thereof are omitted.

[0117] According to the present embodiment, the load detection value of the load sensor 616 corresponding to the angle detection value of the angle sensor 617 when the user's force is not applied to the arm 613 is stored in advance as a load correction value. When the user applies force to the arm 613, the load correction value stored corresponding to the angle detection value of the angle sensor 617 is read, and the electric linear actuator 615 is instructed to generate a load obtained by correcting the set required load value with the read load correction value. Since the correction is performed with the load correction value, a load compensated by offset is generated, and the weight of the arm or backrest, and then the friction resistance of the rotating member or the mechanical movement can be eliminated, and the load set to the operating part can be accurately adjusted to the original required value. That is, the load can be adjusted to a constant value or the original required value.

[0118] As mentioned above, the muscle training device of the present invention has been described with reference to the first to seventh embodiments, but the present invention can of course be applied to various other training machines.

[0119] The above-described embodiments are all illustrative and non-limiting. The present invention can be implemented in various other modifications and variations. Therefore, the scope of the present invention is limited only by the scope of the claims and their equivalents.

Claims

1. A muscle strength training device, characterized in that The invention comprises: an operating part for a user to apply force to perform muscle strength training; a calculation control part; a load sensor which is electrically connected to the calculation control part and detects the load of the operating part; a movement amount sensor which is electrically connected to the calculation control part and detects the movement amount of the operating part; and a load generating part which generates the load applied to the operating part through the control of the calculation control part; the calculation control part is constructed in the following manner, i.e., a load detection value of the load sensor corresponding to the movement amount detection value of the movement amount sensor when the user's force is not applied to the operating part is pre-stored as a correction value, and when the user applies force to the operating part, a corrected load value is generated from the load generating part by correcting the required load value with the correction value corresponding to the movement amount detection value of the movement amount sensor at this time.

2. The muscle training device according to claim 1, wherein: The calculation control unit is configured to generate a load from the load generating unit using the required load value that becomes a predetermined constant value even when the movement amount detected by the movement amount sensor changes.

3. The muscle training device according to claim 1, wherein: The calculation control unit is configured to generate a load from the load generating unit using the required load value that changes according to the amount of movement detected by the movement sensor.

4. The muscle training device according to claim 1, wherein: The operating portion is a rod or a pad that rotates in the up-down direction or the front-back direction by a force applied by a user, and the movement amount sensor is an angle sensor that detects a rotation angle of the rod or the pad.

5. The muscle strength training device according to claim 1, wherein: The operation unit is a seat cushion and a backrest that are moved in the front-rear direction by a force applied by a user, and the movement amount sensor is an angle sensor that detects a rotation angle of an arm connected to the seat cushion and the backrest.

6. The muscle training device according to claim 1, wherein: The operating part is a rod or a pad that rotates in the left-right direction by a force applied by a user, and the movement amount sensor is an angle sensor that detects a rotation angle of the rod or the pad.

7. The muscle training device according to claim 1, wherein: The operation portion is an arm and a backrest that rotate in the front-rear direction by a force applied by a user, and the movement amount sensor is an angle sensor that detects the rotation angle of the arm and the backrest.

8. The muscle strength training device according to claim 1, wherein: The load generating unit may be an electromagnetic resistance actuator that generates a load by converting the rotational force of a motor into a linear motion, a hydraulic actuator that generates a load using oil pressure, a pneumatic actuator that generates a load using air pressure, or an electric assist actuator that generates a load using an electronically controlled cylinder and a speed controller.

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