JP2007050228A - Muscular strength increasing implement for wrist - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a muscular strength increasing implement for the wrist which increases the muscular strength of the wrist by making a user hold a bar-like member in a backhand grip similarly to the case of swinging a golf club or batting in the baseball. <P>SOLUTION: In this muscular strength increasing implement for the wrist, a first grip bar 2 and a second grip bar 3 are connected to be linear, a long connecting rod 5 is inserted in through holes 4, 4 provided in the shaft centers of the grip bars 2, 3 to turnably hold both grip bars at both ends of the connecting rod, in a cavity part 6 formed to communicate with the insides of both grip bars, a pair of abutment members 7, 7 and a pair of spiral springs 24, 8 different in the winding direction are stored in the periphery of the connecting rod 5. Both abut members abuts on each other by an inclined surface formed on one side of each abutment member, and the other ends of the spiral springs, each one end of which is fixed to the respective abutment members with both abutment members held between them, are fixed to the inner ends of the cavity parts of the grip bars, whereby the respective grip bars are held by the right and left hands, and twisted in different directions. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wrist strength enhancer that can strengthen wrist strength while swinging a golf club or holding a rod-shaped member with a reverse hand, for example, as in baseball batting.

  Conventionally, dumbbells and the like are well known as exercise tools that train the strength of the arm, but for example, those that strengthen the muscle force to move the wrist as if twisted, such as a golf club or a baseball bat. It wasn't.

  Then, the wrist training apparatus 30 of the cited reference 1 is demonstrated as an exercise tool for strengthening this kind of muscular strength. As shown in FIG. 11, this device has a hollow shaft 32 containing a pair of compression springs 31a and 31b, and is attached to the shaft 32 at both ends of the hollow shaft 32 in a non-rotating manner. The inner tension disks 33a and 33b are disposed in contact with one of the inner tension disks 31b, and the outer tension disks 34a and 34b are attached to the outer sides of the inner tension disks 33a and 33b so as to rotate with the inner tension disks 33a and 33b. When the tension knob 35 provided on the outer tension disk 34a is rotated in either direction, the screw rod 33 rotates to move the outer tension disk 34a toward or away from the opposite tension disk 34b. Draw.

Further, a sandwich effect is generated in the resistance pads 36 and 37 seated via the respective handles 38a and 38b between the inner tension disks 33a and 33b and the outer tension disks 34a and 34b at both ends of the apparatus 30. When the handle 38a, 38b is gripped and rotated by the user, the resistance provided by the resistance pads 36, 37 is increased, thereby strengthening the wrist muscle strength.
JP-A-7-560

  By the way, in order to strengthen the muscle strength of the wrist, the above-described device is configured to hold the handles 38a and 38b on both sides with the left and right hands and perform a rotational motion against the resistance force provided by the resistance pads 36 and 37. It is a thing.

  However, in the apparatus of the above-mentioned Patent Document 1, the operation of rotating by gripping the handles 38a and 38b is different from the actual operation of gripping a golf club or a baseball bat. It was impossible to train the wrist muscles with the same movement of batting.

  The present invention has been made in view of the above circumstances, and the wrist can be strengthened with strength of the wrist while swinging a golf club or holding a rod-like member with a reverse hand like a baseball batting. An object of the present invention is to provide a muscle strength enhancer.

  In order to achieve the above object, the wrist muscle strength augmenter according to claim 1 of the present invention connects the first grip bar and the second grip bar in a straight line and is attached to the axis of each grip bar. A hollow formed so that a long connecting rod is inserted into a through-hole provided, both grip rods are rotatably held at both ends of the connecting rod, and communicated with each other inside the both grip rods. A pair of abutting members and a pair of winding springs having different winding directions are housed around the connecting rod in the portion, and both the abutting members are contacted by an inclined surface formed on one side of each abutting member. With the other end of the winding spring fixed to one end of each contact member sandwiched between both contact members and fixed to the inner end of the cavity of each grip bar, Both abutment parts are obtained by gripping each grip bar with the left and right hands and twisting them in different directions. Are twisted along their respective inclined surfaces, moving while changing the position at which the mountains by both inclined surfaces abut each other, and when they cross the mountains by both inclined surfaces, they are restored to their original state by the mutual spring force. Both the inclined surfaces are brought into a coincident state again, and the wrist muscle strength is strengthened by repeating such an operation to rotate.

  According to a second aspect of the present invention, there is provided the wrist muscle strength enhancer according to the first aspect, wherein one end of the one winding spring is inserted into an insertion hole provided at an inner end of the hollow portion of the one grip rod. In addition, the spring force of both of the winding springs is adjusted by screwing or loosening a screw rod from the outer end of the one grip rod into the insertion hole.

  According to a third aspect of the present invention, there is provided a wrist muscular strength enhancer that connects the first grip bar and the second grip bar in a straight line and is long in a through hole provided in the shaft core of each grip bar. The connecting rod of the scale is inserted, both grip rods are rotatably held at both ends of the connecting rod, and the connecting rod is formed in a cavity formed so as to communicate with each other inside the grip rods. A winding spring is inserted around the coil spring, and both ends of the winding spring are fixed to the inner ends of the hollow portions of the respective grip bars. It is characterized by being twisted in different directions against the elastic force of the spring.

  According to a wrist muscle strength enhancer of claim 4 of the present invention, the first gripping rod and the second gripping rod are butted in a straight line, and the butted ends of both the gripping rods are mutually connected according to the fitting shape. One winding spring is accommodated in a cavity portion that is rotatably connected and continuously formed in both grip rods, and both ends of the winding springs are inner ends of the cavity portions of the respective grip rods. It is characterized in that each grip bar is gripped by left and right hands and twisted in different directions against the elastic force of the winding spring.

  Furthermore, the wrist muscular strength enhancer according to claim 5 of the present invention is the wrist strength enhancer according to claim 4, wherein each of both end portions of the winding spring is fixed to the first grip rod and the second grip rod via the latch. In addition, the tension of the winding spring can be adjusted by the pressing force of the bolt screwed into the end of each grip bar.

  The wrist muscle strength increasing device of the present invention has a first grip bar and a second grip bar that are connected in a straight shape, gripped by the left and right hands with opposite hands, and twisted in different directions so that The wrist muscle strength can be strengthened against the spring force of the provided winding spring. Further, as described above, by twisting in different directions, both abutting members are twisted along their respective inclined surfaces, and the two mountains move by changing the position where the mountains due to both inclined surfaces abut each other. When the mountain crosses the slope, it returns to its original state by the spring force of each other, and the two slopes are brought into a match again. In addition, since the force acting on the winding spring is limited, there is no possibility that the internal structure is broken.

  Therefore, for example, as with golf clubs or baseball batting, it is possible to strengthen wrist muscle strength by twisting rod-shaped members in different directions while holding them with opposite hands. It becomes possible to easily train muscle strength by using it just like practice of swinging and baseball batting.

  Furthermore, the wrist muscle strength increasing device of the present invention reinforces the wrist muscle strength by twisting the rod-shaped member in different directions while holding the rod-like member with the opposite hand as described above. Therefore, it is useful for strengthening the muscular strength necessary for exercise such as swinging a golf club or baseball batting.

  In addition, as a configuration of the wrist muscle strength increasing device of the present invention, a first grip bar and a second grip bar are connected in a straight line, and a cavity formed so as to communicate with each other inside the grip bar. When one winding spring is inserted around the connecting rod and each end of the winding spring is fixed to the inner end of the cavity of each gripping rod, one elastic member is provided as an internal elastic member. It becomes a simple structure using a winding spring, and can reduce manufacturing cost. In addition, since the first grip rod and the second grip rod are rotated against the elastic force of one internal winding spring while being gripped by the left and right hands, The movement is smooth, which is useful for strengthening muscle strength and arm strength such as swinging golf clubs and twisting left and right wrists required for baseball batting and the like.

  In addition, as a configuration of the wrist muscle strength increasing device of the present invention, the first grip rod and the second grip rod are butted directly, and the butted ends of both grip rods rotate with each other according to the fitting shape. One winding spring is housed in a hollow portion that is freely connected and formed continuously in both grip rods, and both ends of the winding spring are fixed to the inner ends of the hollow portions of the respective grip rods. When it is configured as described above, a connecting rod is not required as in the above-described configuration, and a simple configuration using a single winding spring is achieved, and the manufacturing cost can be reduced. Even in this configuration, the first and second grip bars are rotated against the elastic force of one winding spring while being gripped by the left and right hands. The movement at the time is smooth, which is useful for enhancing muscle strength and arm strength such as swinging golf clubs and twisting left and right wrists required for baseball batting and the like.

  Furthermore, each of the both ends of the winding spring is fixed to the first grip rod and the second grip rod via a locking tool, and the pressing force of the bolts screwed into the ends of the respective grip rods With the configuration in which the tension of the winding spring can be adjusted, the tension of the winding spring housed inside can be adjusted with a simple structure.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 (a) and 1 (b), a wrist muscle strength enhancer 1 according to the present invention connects a first grip rod 2 and a second grip rod 3 in a straight line, and each grip rod. A long connecting rod 5 is inserted into through-holes 4 and 4 provided in two and three shaft cores, and both grip rods 2 and 3 are rotatably held at both ends of the connecting rod 5. Further, in the hollow portions 6 and 6 formed so as to communicate with each other inside the grip rods 2 and 3, a pair of winding members having different winding directions from the pair of contact members 7 and 7 around the connecting rod 5. The springs 8 and 8 are accommodated, and both contact members 7 and 7 are contacted by inclined surfaces 7a and 7a formed on one side of each contact member 7 and 7, and both contact members 7 are also contacted. , 7 and the other end (extension end portions 8b, 8b) of the winding springs 8, 8 having one end (extension end portions 8a, 8a) fixed to the respective abutting members 7, 7 on the respective holding members. It has the structure fixed to the inner end of a few cavity parts 6 and 6.

  The above configuration will be described in more detail. FIG. 2 shows a state in which the connection state of both grip bars 2 and 3 is released and the internal structure is exposed in the above configuration. As shown in this figure, the first grip rod 2 and the second grip rod 3 are both formed into an elongated cylindrical shape having the same diameter, and by connecting these grip rods 2 and 3 in a straight line, FIG. As shown in (b), it can be configured to form one elongated rod-like cylindrical shape.

  In addition, while forming the step-shaped annular convex part 3a in the outer periphery of the edge part of the connection side of any one grip rod (2nd grip rod 3 in FIG. 2), the other grip rod (in FIG. 2). A state in which both grip rods 2 and 3 are connected in a straight line by forming an annular recess 2a that fits the annular projection 3a on the inner periphery of the end of the first grip rod 2) on the connection side. Thus, the annular convex portion 3a of one grip rod 3 and the annular concave portion 2a of the other grip rod 2 are in a beautiful matching state with no gap.

  In FIG. 2, hollow portions 6, 6 communicating with each other are formed inside the first grip rod 2 and the second grip rod 3, and the shaft cores of both the grip rods 2, 3 are penetrated. Holes 4 and 4 are formed, and long connecting rods 5 are inserted into the through holes 4 and 4 of the respective grip rods 2 and 3.

  As shown in FIG. 1 (a), the connecting rod 5 is formed in a state where the first grip rod 2 and the second grip rod 3 are connected and matched in a straight line. 4 and 4 are inserted. Further, in FIG. 1 (a) or FIG. 2, the locking holes 5a and 5a formed in the vicinity of both ends of the connecting rod 5 are exposed to the outside, and the locking rings 9 and 9 by fitting the through holes 9b, 9b of the screw 9 and screwing the locking screws 10, 10 into the peripheral holes 9a, 9a provided in the locking rings 9, 9 to be locked. 2 and the second grip bar 3 are held in a straight connection state, and the respective grip bars 2 and 3 are rotatable.

  As another means for locking the locking rings 9 and 9 fitted to both ends of the connecting rod 5 with the set screws 10 and 10 as described above, locking holes 5a provided at both ends of the connecting rod 5 are used. A split pin (not shown) may be inserted into 5a, or may be locked by another method.

  In any case, as shown in FIG. 1 (a), the connecting rod 5 is passed through the through holes 4 and 4 provided in the axial centers of the first grip rod 2 and the second grip rod 3, When both ends of the connecting rod 5 are locked by some means, as shown in FIG. 1 (b), both the grip rods 2, 3 are kept in a straight connection state, and each grip rod 2 3 is in a state of being rotatably connected and held.

  Further, a pair of abutting members 7 around the connecting rod 5 is formed in the hollow portions 6 and 6 formed in the first grip rod 2 and the second grip rod 3 in communication with each other as described above. , 7 and a pair of winding springs 8, 8 having different winding directions are housed.

  As shown in FIG. 2, the respective contact members 7, 7 have the same shape, and have a cylindrical outer shape that can move inside the hollow portions 6, 6 of both grip bars 2, 3, and one side thereof. It is set as the shape which has the inclined surfaces 7a and 7a which cut off the edge part in the inclined form. In addition, through holes 7b and 7b through which the connecting rod 5 is slidably inserted are formed at the centers of the respective contact members 7 and 7, and in the vicinity of the peripheral portions of the end surfaces of the respective contact members 7 and 7. Are formed with insertion holes 7c and 7c for inserting extension ends 8a and 8a of winding springs 8 and 8, which will be described later.

  The connecting rods 5 are inserted into the respective through holes 7b and 7b so that the inclined surfaces 7a and 7a of the two contact members 7 and 7 are opposed to each other. A pair of winding springs 8 and 8 disposed on both sides with different winding directions are inserted into the connecting rod 5. Further, the other extension end portions 8b, 8b of the respective winding springs 8, 8 are inserted into the insertion holes 2b, 3b provided at the inner ends of the hollow portions 6, 6 of the respective grip rods 2, 3, The state shown in FIG.

  In this state, both the grip rods 2 and 3 are connected in a straight line as described above, and both ends of the connection rod 5 are locked to keep the entire length of the pair of grip rods 2 and 3 constant. The configuration is maintained in the state.

  In the above configuration, one winding spring 8, that is, in this embodiment, one end 8 b of the winding spring 8 on the first grip rod 2 side is connected to the inner end of the hollow portion 6 of the first grip rod 2. The insertion hole 2b is inserted into the insertion hole 2b, and a slightly larger diameter insertion hole 11 is formed from the outer end of the second gripping rod 2 to the insertion hole 2b to communicate with the insertion hole 2b. The screw 12 inserted from the outer end of the grip rod 2 through the insertion hole 11 is screwed into the inner periphery of the insertion hole 2b. For this reason, a female screw corresponding to the male screw shape of the screw rod 12 is formed on the inner periphery of the insertion hole 2 b of the second gripping rod 2.

  With such a configuration, by inserting the tip of a driver from the outside into the insertion hole 11 of the second grip rod 2 and rotating the screw rod 12 to be screwed or loosened, both the winding springs 8 and 8 as a whole. Can be compressed or stretched to adjust both spring forces.

  In order to use the wrist muscle strength increasing device 1 configured as described above, as shown in FIG. 6, the first grip rod 2 and the second grip rod 3 may be reversed or forward with the left and right hands. The hand is twisted (FIG. 6 shows a state in which the hand is gripped with a reverse hand), and the wrist is twisted by rotating to twist in different directions against the spring force of the respective winding springs 8 and 8. Strength can be strengthened.

  In such an operation, as shown in FIG. 5 (a), as a normal state, from the state of being in contact with the inclined surfaces 7a, 7a formed on one side of each of the contact members 7, 7, By twisting the first grip rod 2 and the second grip rod 3 in different directions as described above, the contact members 7 and 7 are twisted along the respective inclined surfaces 7a and 7a. The slopes 7a and 7a move while changing the position where they come into contact with each other. Finally, when they cross the peaks of both slopes 7a and 7a, the springs return to their original state, and both slopes again. The surfaces 7a and 7a are in a matched state. By repeatedly rotating such an operation, it is possible to strengthen wrist muscle strength. Moreover, since the force which acts on the winding springs 8 and 8 is restricted by having said structure, there is no possibility that an internal structure may be broken.

  In addition, in the above operation, regardless of the direction of twisting, one of the pair of winding springs 8 and 8 having different winding directions is contracted and the other is expanded, so that the user feels the same resistance. It can be operated while being excellent in usability.

  As shown in FIGS. 7A to 7C, the wrist muscle strength increasing device 1 according to this embodiment connects the first grip rod 2 and the second grip rod 3 in a straight line and each of them. A long connecting rod 5 is inserted into the through holes 4 and 4 provided in the shaft cores of the grip rods 2 and 3, and both the grip rods 2 and 3 are rotatably held at both ends of the connecting rod 5, One winding spring 13 is inserted around the connecting rod 5 in the hollow portions 6 and 6 formed so as to communicate with each other inside the both grip rods 2 and 3, and each end of the winding spring 13 is inserted. By fixing the gripping portions 2 and 3 to the inner ends of the hollow portions 6 and 6 of the respective grip rods 2 and 3, the respective grip rods 2 and 3 are gripped by the left and right hands to resist the elastic force of the winding spring 13. By twisting alternately in different directions, the muscle strength and arm strength of the left and right wrists are strengthened.

  The above configuration will be described in more detail. FIG. 8 shows a disassembled state where both the grip bars 2 and 3 are disconnected. As shown in this figure, the first grip rod 2 and the second grip rod 3 are both formed into an elongated cylindrical shape having the same diameter, and by connecting these grip rods 2 and 3 in a straight line, FIG. As shown in (c), it can be configured to form one elongated rod-like cylindrical shape.

  In the wrist muscle strength increasing device 1 described above, a step-shaped annular convex portion 3a is formed on the outer periphery of the end portion on the connection side of either one of the grip bars (second grip bar 3 in FIG. 8). By forming an annular recess 2a that fits the annular projection 3a on the inner periphery of the connection side end of the other grip rod (first grip rod 2 in FIG. 8), both grip rods 2 are formed. 3 are connected in a straight line so that the annular convex portion 3a of one grip rod 3 and the annular concave portion 2a of the other grip rod 2 are in a clean matching state with no gap.

  Further, in FIG. 8, hollow portions 6, 6 communicating with each other are formed inside the first grip rod 2 and the second grip rod 3, and the shaft cores of both the grip rods 2, 3 are penetrated. Holes 4 and 4 are formed, and long connecting rods 5 are inserted into the through holes 4 and 4 of the respective grip rods 2 and 3.

  As shown in FIG. 7 (a), the connecting rod 5 is formed in a state where the first grip rod 2 and the second grip rod 3 are connected and matched in a straight shape, and the through holes of both the grip rods 2 and 3 are connected. 4 and 4 are inserted. 7A, the locking holes 5a and 5a formed in the vicinity of both ends of the connecting rod 5 are exposed to the outside, and the locking rings 9 and 9 pass through the both ends of the connecting rod 5. By fitting the holes 9b and 9b and screwing and locking the set screws 10 and 10 into the peripheral holes 9a and 9a provided in the locking rings 9 and 9, the first grip rod 2 and the first The two grip bars 3 are held in a straight connection state, and the respective grip bars 2 and 3 are rotatable.

  As another means for locking the locking rings 9 and 9 fitted to both ends of the connecting rod 5 with the set screws 10 and 10 as described above, locking holes 5a provided at both ends of the connecting rod 5 are used. A split pin (not shown) may be inserted into 5a, or may be locked by another method.

  Further, in the hollow portions 6, 6 formed in the first grip rod 2 and the second grip rod 3 in communication with each other as described above, one winding spring 13 is provided around the connection rod 5. Is stored. This winding spring 13 has spring end portions 13 a and 13 b extending in the axial direction at both ends, and one spring end portion 13 a is inserted through the inner end on the back side of the cavity portion 6 of the first gripping rod 2. In addition to being inserted into the hole 2b, the other spring end portion 13b is inserted into the insertion hole 2b provided at the inner end on the back side of the cavity portion 6 of the second gripping rod 2, and in this state, as described above. The first grip bar 2 and the second grip bar 3 are held in a straight connection state, and the respective grip bars 2 and 3 are rotatable.

  The method of using the wrist muscle strength enhancer 1 configured as described above is the same as that of the first embodiment, and as shown in FIG. 6, the first grip rod 2 and the second grip rod 3 are moved left and right. By gripping with each hand in reverse or forward (FIG. 6 shows a state in which the hand is gripped with reverse hand) and rotating to twist in different directions against the spring force of the respective winding springs 8 and 8 It becomes possible to strengthen the muscular strength to twist the wrist.

  In such a movement, the user can operate while feeling the same resistance by contracting or extending the winding spring 13 having a different winding direction regardless of which direction is twisted. Further, the movement of gripping and twisting the first grip rod 2 and the second grip rod 3 with the left and right hands in this way is a smooth motion of twisting one winding spring 13 against the elastic force. Therefore, it is possible to obtain a wrist muscular strength enhancer with good usability.

  Furthermore, the wrist muscle strength increasing device of the present invention is not only the operation of grasping the rod-like member with the reverse hand as described above, but also twisting in different directions while grasping with the forward hand as in the first embodiment. Since the wrist muscle strength can be strengthened by this, it is useful for strengthening the muscle strength required for exercise such as swinging a golf club or baseball batting.

  As shown in FIG. 9 (a), the wrist muscle strength enhancer 1 according to this embodiment causes the first gripping rod 22 and the second gripping rod 23 to butt straight, and both the gripping rods 22 are used. , 23 are rotatably connected to each other by a fitting shape, and one winding spring 14 is accommodated in hollow portions 22a, 23a formed continuously inside both grip rods 22, 23. The both ends of the winding spring 14 are fixed to the inner ends of the hollow portions 22a and 23a of the grip rods 22 and 23, respectively.

  The above configuration will be described in more detail. FIG. 10 shows a disassembled state in which the connection between the first grip bar 22 and the second grip bar 23 is released. As shown in this figure, the first grip rod 22 and the second grip rod 23 both have an elongated cylindrical shape with the same diameter, and the grip rods 22 and 23 are connected in a straight line, so that FIG. As shown in (c), one elongated rod-like cylindrical shape is formed.

  In FIG. 9, cavities 22 a and 23 a communicating with each other are formed inside the first grip rod 22 and the second grip rod 23. The butting ends of both grip rods 22 and 23 are formed, for example, on the outer peripheral side of the step 22b formed on the inner peripheral side of the end portion of the first grip rod 22 and the end portion of the second grip rod 23. The step 23b has a shape that can be fitted to each other, and by fitting these step portions 22b and 23b, the butted ends of both grip bars 22 and 23 are coupled to each other so as to be rotatable. In addition, an annular recess 22c is formed on the outer periphery of the step 22b of the first gripping rod 22, while screws 15 and 15 are inserted into screw holes 23c and 23c provided at two locations on the end of the second gripping rod 23. , And the respective screw 15 are tightened and locked in the annular recess 22c, so that the butted ends of both grip rods 22 and 23 that are rotatably connected as described above are not detached. It becomes a structure.

  Further, one long spring 14 is accommodated in the hollow portions 22a and 23a inside the grip rods 22 and 23. Extension ends 14a and 14a extended in a straight shape are formed at both ends of the winding spring 14, and locking tools 16 and 16 are provided to fix the extension ends 14a and 14a, respectively. As shown in FIG. 9 (a) or FIG. 10, the locking tool 16 has a short cylindrical shape having an outer diameter that is accommodated in the hollow portions 22a and 23a of the respective grip bars 23, and has an axial direction on the outer periphery. A key groove 16a is formed along the insertion hole 16b, and an insertion hole 16b into which the extended end portion 14a of the winding spring 14 is inserted is formed at one end.

  In the state where the extended end portions 14a, 14a of the winding spring 14 are inserted into the insertion holes 16b, 16b of the respective locking tools 16, 16 having such a configuration, the respective locking tools 16, 16 are connected to the first gripping rod. 22 and the second gripping rod 23 are inserted into the hollow portions 22a and 23a, and screws 17 and 17 are screwed into screw holes 23d and 23d formed on the outer periphery of the gripping rod 23, respectively. Are locked in the key grooves 16a and 16a of the respective locking tools 16 and 16.

  Further, the press bolts 19 and 19 are screwed into the screw holes 18 and 18 formed in the axially penetrating state at the end portions of the respective grip rods 22 and 23, and the tip ends of the respective press bolts 19 and 19 are respectively The tension of the winding spring 14 accommodated inside the first grip rod 22 and the second grip rod 3 can be adjusted by the pressing force when the locking tools 16 are pushed.

  In addition, in the structure of a present Example, by using the hexagon socket head bolt (refer FIG.9 (b)) whose full length is the same diameter as the press volt | bolt 19, and making the heads of the screws 15 and 17 into an embedded type, As shown in FIG. 9 (c), the first and second grip rods 22 and 23 have a cylindrical shape with no protrusions on the outer periphery and both end portions, and a simple outer shape can be obtained. Become.

  With the above-described configuration, in the muscle strength increasing device 1 of the present embodiment, the user can have the same smooth resistance by contracting or extending the winding springs 13 having different winding directions regardless of the direction of twisting. It is possible to obtain a wrist muscular strength enhancer that can be operated while feeling sensation. Further, the first grip rod 22 and the second grip rod 23 are gripped with the left and right hands with the opposite hand or the forward hand, and are rotated so as to be twisted in different directions against the spring force of the winding spring 14. This makes it possible to reinforce the muscular strength of twisting the wrist, and by twisting in different directions while grasping with good hands, it is necessary for exercise such as golf club swinging and baseball batting. Useful for strengthening muscle strength.

  The wrist muscle strength increasing device of the present invention is provided inside by gripping the first grip rod and the second grip rod connected in a straight shape with the left and right hands and twisting them in different directions. The wrist muscle strength can be strengthened against the spring force of the wound spring. For example, the wrist can be shaken with a reverse or forward hand like a golf club or a baseball batting. It can be used as a wrist muscle strength enhancer that can strengthen the muscle strength of the wrist.

(a) is a figure which shows the internal structure of the wrist muscle strength increasing device by this invention, (b) is an external view. It is a disassembled perspective view which shows the internal structure of the wrist muscle strength augmenter by this invention. It is a perspective view which shows the external appearance after the assembly of the wrist muscle strength increasing device by this invention. 1 is an exploded view of a wrist muscle strength increasing device according to the present invention. FIG. (a) is a figure which shows the internal structure of the wrist muscle strength increasing device by this invention, (b) is a figure which shows the internal structure of the twisted state. It is a figure which shows the use condition of the muscular strength augmenter of the wrist by this invention. (a) is a figure which shows the internal structure of the muscular strength augmenter of the wrist in Example 2 of this invention, (b) is an external view. It is a disassembled perspective view of the wrist muscle strength increasing tool in Example 2 of this invention. (a) is a figure which shows the internal structure of the wrist muscle strength increasing tool in Example 3 of this invention, (b) is an end elevation, (c) is an external view. It is a disassembled perspective view of the wrist muscle strength increasing tool in Example 3 of this invention. It is sectional drawing which shows the internal structure of patent document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strength enhancer 2 1st grip rod 2a Annular recessed part 2b Insertion hole 3 2nd grip rod 3a Annular convex part 3b Insertion hole 4 Through-hole 5 Connecting rod 5a Locking hole 6 Cavity part 7 Contact member 7a Inclined surface 7b Through hole 7c Insertion hole 8 Winding spring 8a Extension end 8b Extension end 9a Circumferential hole 9b Through hole 10 Set screw 11 Insertion hole 12 Screw 13 Winding spring 13a, 13b Spring end 14 Winding spring 14a Extension end 15 Screw 16 Locking tool 16a Key groove 16b Insertion hole 17 Screw 18 Screw hole 19 Press bolt 22 First grip rod 22a Cavity 22b Step 22c Annular recess 23 Second grip rod 23a Cavity 23b Step 23c Screw hole 23d Screw hole

Claims (5)

The first grip rod and the second grip rod are connected in a straight line, and a long connecting rod is inserted into a through hole provided in the shaft core of each grip rod. A pair of winding springs having different winding directions with respect to the pair of contact members around the connecting rod in a hollow portion formed to hold the grip rod in a freely rotatable manner and communicate with each other inside both the grip rods The both abutting members are abutted by an inclined surface formed on one side of each abutting member, and one end of each abutting member is sandwiched between both abutting members. By fixing the other end of the wound spring fixed to the inner end of the cavity of each grip bar, each grip bar is gripped by the left and right hands and twisted in different directions, Both abutting members are twisted along their respective inclined surfaces, and the peaks due to both inclined surfaces abut each other. It moves while changing its position, and when it crosses the mountain due to both inclined surfaces, it returns to its original state by the spring force of each other, and both inclined surfaces are brought into agreement again, and this operation is repeated repeatedly. A wrist muscle strength enhancer characterized by strengthening wrist muscle strength by moving. One end of the one winding spring is inserted into an insertion hole provided at an inner end of the hollow portion of the one grip rod, and a screw rod is inserted into the insertion hole from an outer end portion of the one grip rod. 2. The wrist muscle strength enhancer according to claim 1, wherein the spring force of both of the winding springs is adjusted by screwing or loosening. The first grip rod and the second grip rod are connected in a straight line, and a long connecting rod is inserted into a through hole provided in the shaft core of each grip rod. A gripping rod is rotatably held, and a winding spring is inserted around the connecting rod in a hollow portion formed so as to communicate with each other inside both the gripping rods. Both ends are fixed to the inner ends of the hollow portions of the respective grip rods, and the respective grip rods are gripped by the left and right hands and twisted in different directions against the elastic force of the winding spring. Wrist strength-enhancing device characterized by that. The first grip rod and the second grip rod are butted in a straight line, and the butted ends of both grip rods are connected to each other by a fitting shape so as to be rotatable, and are continuously connected to both grip rods. One winding spring is housed in the hollow portion formed in this manner, and both ends of the winding spring are fixed to the inner ends of the hollow portions of the respective grip rods, and each grip rod is held by the left and right hands. A wrist muscle strength enhancer characterized in that it is gripped and twisted in different directions against the elastic force of the winding spring. Each of both ends of the winding spring is fixed to the first grip rod and the second grip rod via a locking tool, and by the pressing force of a bolt screwed into the end of each grip rod. The wrist muscle strength increasing device according to claim 4, wherein tension of the winding spring is adjustable.