JP4028465B2 - Exercise equipment - Google Patents

Description

  The present invention relates to an exercise device used for rehabilitation of a patient having a disorder in a shoulder, arm, elbow, wrist, or the like.

  Conventionally used exercise equipment such as those described above cannot specifically raise known literature, but the rotary drive shaft protrudes from both side surfaces of the equipment body incorporating a drive mechanism consisting of a motor and a speed reducer, One end of the crankshaft was attached to the projecting shafts at both ends, and a handle (grip) was attached to the other end of both crankshafts so as to be rotatable just like a bicycle pedal, and a rehabilitation patient grasped both handles. By driving the rotary drive shaft in the state, the handle is pivoted around the rotary drive shaft via the crankshaft, thereby swinging both arms of the patient to bend the bicycle and flexing and stretching the elbow, shoulder and elbow The wrist is rehabilitated.

  By the way, in such exercise equipment, the turning speed of the handle is very constant and can be adjusted freely. However, the crankshaft is a rigid body made of a metal material and always draws a track with a constant radius. If the rehabilitation patient is gripping the handle in an unreasonable manner, for example, there is pain in the shoulder and the arm cannot be fully extended, but the arm is stretched with force There is a problem that when the handle is held without sufficient flexion and extension of the arm, excessive force is applied to the shoulder, elbow, wrist, etc., and the shoulder, elbow, wrist, etc. are damaged. there were.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an exercise device that prevents a user's shoulder, elbow, wrist, etc. from being damaged even when the user grips the handle in an unreasonable manner. Objective.

  According to the first aspect of the present invention, the rotary drive shaft 3 is protruded from both side surfaces 1a, 1a of the instrument main body 1, and one end of the crankshaft 5 is connected to the both end protruding shafts 4, 4, respectively. The handle 6 is rotatably attached to the other end portions of 5 and 5, and the handle 6 is turned via the crankshaft 5 by driving the rotary drive shaft 3 while the user holds the handles 6 and 6. In the exercise apparatus that rehabilitates a user's shoulder, elbow, wrist, etc., the crankshaft 5 is formed of an elastic material that bends when bending resistance acts on the crankshaft 5. To do.

  According to a second aspect of the present invention, in the exercise device according to the first aspect, the elastic material is made of a synthetic rubber such as urethane rubber.

  According to the exercise apparatus of the first aspect of the present invention, the crankshaft is formed of an elastic material that bends when a certain amount of bending resistance is applied to the crankshaft, so that the user's arm has no bending margin. When the handle is pivoted when holding the handle in a distorted shape, a force that tries to maintain the unreasonable shape acts on the user's arm, which acts as a bending resistance against the crankshaft, As a result, the rank axis is bent, so that the turning radius of the handle is shortened, the excessive bending and stretching of the arm is suppressed, and the shoulder, elbow, wrist and the like are not damaged.

  According to the exercise apparatus of the invention according to claim 2, the elastic material is made of synthetic rubber such as urethane rubber, so that the crankshaft can be easily manufactured and the cost can be reduced, the flexibility is smooth, and when bent, There is little pain in the shoulders, elbows, wrists, etc.

  FIG. 1 is an external perspective view showing an exercise apparatus according to the present invention, FIG. 2A is a longitudinal sectional view of a crankshaft 5 and a handle 6 of the exercise apparatus, and FIG. 1B is a view of the crankshaft 5 shown in FIG. The longitudinal cross-sectional view in the state which rotated the handle | steering-wheel 6 90 degree | times around the axis 5o of the crankshaft 5, FIG.

  In FIG. 1, reference numeral 1 denotes an instrument body which is formed in a generally rice cake shape and has both side surfaces 1a and 1a formed as flat surfaces. Reference numeral 2 denotes a fixing base for fixing the instrument main body 1 and includes a pedestal portion 2a on which the instrument main body 1 is mounted and fixed leg portions 2b and 2b provided continuously at both front and rear ends of the pedestal portion 2a.

  Although not shown in the figure, the instrument body 1 has a built-in drive mechanism including a motor and a speed reducer. From both side surfaces 1a and 1a of the instrument body 1, a rotational drive shaft that is rotationally driven by the drive mechanism. 3 projecting shaft portions 4 and 4 are projected. The both ends projecting shafts 4 and 4 of the rotary drive shaft 3 are each formed in a prismatic shape at the tip.

  Thus, one end of each of the crankshafts 5 and 5 is attached to both end protruding shafts 4 and 4 of the rotary drive shaft 3 protruding from both side surfaces 1a and 1a of the instrument body 1, Handles 6 and 6 are attached to the end portions so as to be rotatable around respective axes 6o and 6o. Both the handles 6 and 6 are attached in the same manner as a pair of pedals of a bicycle, and are positioned on opposite sides of the rotation drive shaft 3 with the rotation axis 3o interposed therebetween.

  As shown in FIGS. 2A and 2B, the crankshaft 5 includes a crankshaft body 6, a drive shaft connecting member 7 connected to one end of the crankshaft body 6, and the crankshaft body 6. And a cylindrical cover 9 that covers the outer peripheral surface of the crankshaft main body 6.

  The crankshaft body 6 is formed in a cylindrical shape by urethane rubber as an elastic material, particularly 90 ° urethane rubber, which can be bent when a bending resistance as described later acts on the crankshaft body 6 during operation of the crankshaft 5. Has been. The drive shaft connecting member 7 and the handle connecting member 8 are each made of a metal material, and the drive shaft connecting member 7 is fitted with a square hole 7o that fits into the tip prism portion of the protruding shaft portion 4 of the rotary drive shaft 3. It is composed of a combination tube portion 7a and a connecting piece 7b projecting from the outer surface portion of the fitting tube portion 7a so as to be orthogonal to the axis of the fitting tube portion 7a. Further, the handle connecting member 8 is provided so as to protrude perpendicularly to the fitting cylinder portion 8a having an attachment hole 8o fitted and fixed to the one end portion 10a of the handle attachment shaft 10, and the axis of the fitting cylinder portion 8a. The connecting piece 8b. The cylindrical cover 9 is formed of urethane foam or the like that is softer than the crankshaft body 6.

  In order to connect the drive shaft connecting member 7 and the handle connecting member 8 to the crankshaft body 6, the drive shaft connecting member 7 and the connecting portion piece fitting holes 11, 12 formed at both ends of the crankshaft body 6 are provided. The connecting portion pieces 7b and 8b of the handle connecting member 8 may be fitted and fixed by bolts 13 and nuts 14 penetrating the both ends of the crankshaft body 6 and the connecting portion pieces 7b and 8b, respectively. The cylindrical cover 9 is fitted on the crankshaft body 6 before connecting the connecting members 7 and 8 to the crankshaft body 6, and both end portions 9a and 9b are rolled up to connect the connecting members 7 and 8 to each other. After the connection of 8, the rolled up end portions 9 a and 9 b may be returned to the original state so as to cover the bolt 13 and the nut 14 as shown in FIG.

  The handle 6 has a cylindrical handle main body 16 fitted on a metal handle mounting shaft 10 whose one end 10 a is fitted and fixed in the mounting hole 8 o of the handle connecting member 8 through a metal bearing member 15. Thus, the cylindrical handle body 16 is formed by a soft synthetic resin such as urethane foam because the user directly grabs the cylindrical handle body 16.

  In FIG. 1, 17 is a power cord of a drive mechanism that rotationally drives the rotary drive shaft 3, 18 is a controller provided with a motor start / stop button, a rotation direction setting button, a rotation speed adjustment button, etc., 19 Controller power cord.

  The exercise equipment configured as described above is not used directly for seriously ill patients such as shoulders, arms, elbows, wrists, etc., but patients whose functions of shoulders, arms, elbows, wrists, etc. have recovered to some extent, Used for patients with middle rehabilitation. Of course, this exercise apparatus may be used by a healthy person.

  When the exercise apparatus is used, if the motor of the drive mechanism is activated to rotate the rotary drive shaft 3 at a constant speed, for example, in the direction of the arrow in FIG. 1, the handles 6 and 6 are respectively rotated via the crankshafts 5 and 5. 3 is turned around the rotation axis 3o of the rotary drive shaft 3 at opposite positions on both sides thereof. When a patient with a disease in the shoulders, arms, elbows, wrists, etc. grasps the turning handles 6 and 6 with both hands 20 and 20, both arms 20 and 20 turn with the handles 6 and 6 while both arms 20 and 20 can be rocked while bending and stretching at the elbows, that is, repeating bending and stretching.

  At this time, if the patient's arm 21 holds the handle 6 in a state where the arm 21 has a sufficient bending / extension margin, the crankshaft 5 does not have bending resistance to bend and deform the crankshaft 5, and therefore the crankshaft 5 is bent and deformed. Without rotating, the handle 6 rotates around the rotation axis 3o of the rotation drive shaft 3 with a predetermined turning radius while maintaining the normal form and rotating around the rotation drive shaft 3.

  However, for example, when there is a disease in the patient's shoulder and the arm 21 is stretched, the patient feels severe pain and cannot fully extend. When turning to the far side, the patient's hand 20 holding the handle 6 instinctively acts to instinctively stop the extension of the arm 21 in order to avoid severe pain when the arm 21 extends. Acts as a bending resistance for the crankshaft 5.

  When bending resistance acts on the crankshaft 5 in this manner, the crankshaft 5 bends in a state in which the crankshaft 5 is tilted laterally by the handle 6 as indicated by phantom lines in FIG. By bending the crankshaft 5 in the lateral direction in this way, the turning radius of the handle 6 is shortened, the excessive extension of the arm 20 is suppressed, and the elbow part and the shoulder part are not damaged.

  In addition, when the arm 21 is bent, the patient feels severe pain. When the handle 6 is gripped while being stretched, the handle 6 is gripped when the handle 6 turns to the patient's front side. A force acting on the patient's hand 20 to prevent the arm 21 from bending when the arm 21 bends is prevented, and the force acts as a bending resistance against the crankshaft 5. Then, also in this case, the crankshaft 5 is bent in the lateral direction, the turning radius of the handle 6 is shortened, the excessive extension of the arm 20 is suppressed, and the elbow and the like are not damaged.

  In this embodiment, urethane rubber (especially 90 ° urethane rubber) is used as the elastic material forming the crankshaft 5, but synthetic rubber other than urethane rubber can also be used. Among synthetic rubbers, urethane rubber has excellent mechanical properties and sufficient tensile strength and elongation. In particular, 90 ° urethane rubber is most suitable for the crankshaft 5 according to the present invention. Further, the elastic material forming the crankshaft 5 is not limited to the synthetic rubber such as urethane rubber, and a metal spring material may be used. However, if a metal spring material is used, it becomes difficult to manufacture the crankshaft 5 and the cost is high. Therefore, if a synthetic rubber containing urethane rubber as described above is used as an elastic material, the crankshaft 5 can be easily manufactured and the cost can be reduced, the flexibility is smooth, and the shoulder, elbow, wrist, etc. are painful when bent. There is little to feel.

1 is an external perspective view showing an exercise device according to the present invention. (a) is a longitudinal sectional view of the crankshaft and the handle of the exercise apparatus, and (b) is a longitudinal sectional view of the crankshaft and the handle shown in (a) in a state rotated 90 degrees around the axis of the crankshaft. It is explanatory drawing which shows the use condition of the exercise equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument body 1a Side surface 3 of instrument body Rotation drive shaft 4 Projection shaft part 5 Rotation drive shaft 5 Crank shaft 6 Handle

Claims (2)

The rotary drive shaft protrudes from both sides of the instrument body, one end of the crankshaft is connected to the protruding shaft on both ends, and a handle is rotatably attached to the other end of both crankshafts. In an exercise device in which the handle is rotated through the crankshaft by driving the rotary drive shaft while the handle is held, and the shoulder, elbow, wrist, etc. of the user is rehabilitated, the crankshaft is An exercise device formed of an elastic material that bends when bending resistance acts on the crankshaft. The exercise device according to claim 1, wherein the elastic material is made of synthetic rubber such as urethane rubber.

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