Finger training device

Abstract: A finger training device comprises a grip portion (2), and a roller supporting member (5) provided at one end of the grip portion for bearing a pair of rollers (20). The position of the grip portion can be adjusted relative to the roller supporting member and/or the rollers so that the relative position of the palm and fingers may be adjusted arbitrarily. This arrangement will preclude the danger of the finger training device falling off from the hand, and ensures that a better training of fingers will be performed. The device, when provided with pyramid-shaped projections on the surface of the rollers, will form a healthful device for stimulating physiologically effective spots on the body.

Description: The present invention relates to a portable finger training device. US-A-3 779 548 describes a finger training device comprising: a grip portion which can be gripped by one hand; two spaced arms which extend from the grip portion in a lateral direction; a pair of rollers juxtaposed and rotatably supported between these arms; and gears respectively fixed to these rollers and meshing with each other, and is used for training the fingers in such a manner that the grip portion is gripped by a hand with the thumb and one of the remaining three fingers (forefinger, middle finger and medical finger) of the hand being applied to the rollers so as to reciprocate the rollers within a constant range of angle in opposite directions. It has been known that intentional movement of fingers stimulates the brain and enhances the faculty of memory from the fact that memory may be supported by repetitively writing the spelling of an English word a number of times. Further, it may now be explained from the viewpoint of the cerebral physiology that it may afford rehabilitation effects to a physically handicapped or advanced-aged person and, additionally, be effective for a person lacking sufficient grasping power to train the fingers. In addition to such finger training, it is well known that a large number of pyramid-shaped projections provided on the periphery of the rollers, when applied to physiologically effective spots on the body for stimulating these spots, will enhance the circulation of blood in the body, and is effective in maintaining and improving the health. For example, stimulation to the physiologically effective spots on the fingers of the hand or on the foot will enhance the circulation of blood through the internal organs and the brain, enhancing the functions of them, and is very effective in preventing the phenomena of ageing, for example. However, the above-described finger trainer and spot-stimulator, is not arranged to allow a manner of training of finger tips in which the angles of the wrist and finger tips are changed while the grip portion is gripped. Further, the device may accidentally fall off from the hand if the force of the fingers gripping the grip portion is weak. An object of the present invention is therefore to improve the earlier finger training device which the applicant has proposed, so as to provide a finger training device which is further effective in enhancing memory, exercises in writing of letters, and rehabilitation exercises for enhancing the gripping power of physically handicapped or advanced-aged persons, which can be held in a stable manner or which enables spot stimulation. According to the present invention there is provided a finger training device comprising: a grip portion which can be gripped by one hand; a roller supporting frame provided at the forward end, as seen in the longitudinal direction, of the grip portion; a pair of arms projecting from such roller supporting frame in the same lateral direction relative to the longitudinal direction of said grip portion; and a pair of rollers juxtaposed between the pair of arms and having projections and depressions on the periphery of each of the rollers, each of the rollers having a gear at one end thereof, said gears meshing with each other so that they can rotate in opposite directions, said finger training device being characterized in that the roller supporting frame is supported by the grip portion in such a manner that the roller supporting frame can be bent to at least two positions in the roller direction. In a preferred embodiment the roller supporting frame is provided with a roller mounting frame which roller mounting frame can be bent about an axis normal to a supporting plane defined by the axes of the two rollers. Moreover, a finger applied frame may be provided within the grip portion in such a manner that it can be extended out of and retracted into the grip portion. In the so arranged finger training device, the grip portion is movable relative to the rollers within a predetermined range. In addition, because the presence of the finger applied frame allows the relative position of the palm of the hand and the finger tips to be corrected even if the gripping fingers are moved, the device will not fall off from the hand. Further, the presence of the finger applied frame makes it possible to prevent the device from falling by means of finger tips even if the grip portion happens to come off from the palm of the hand. Further, when pyramid-shaped projections and depressions are formed on the periphery of the rollers, the device will positively effective in maintaining the health since stimulation can be applied to physiologically effective spots on the finger tips and on other portions of the body which can be reached by the hand. BRIEF DESCRIPTION OF THE DRAWINGS Figs. 1 and 2 are perspective views showing two different states of the grip portion of the finger training device according to the present invention. Figs. 3A and 3B are perspective views showing two different states of a roller mounting frame in use. Figs. 4 and 5 are perspective views showing several states in use other than those in Figs. 3A and 3B. Fig. 6 is a cross sectional view. Fig. 7 is a cross sectional view for explanation of the rotary mechanism of the roller mounting frame. Fig. 8 is a transverse cross sectional view of Fig. 7. Fig. 9 is a cross sectional view showing the roller supporting portion body and the mechanism for maintaining the angle of rotation of the roller supporting frame. Fig. 10 is an exploded perspective view of them. Fig. 11 is an exploded view of the mechanism of the finger applied frame shown in Fig. 6. Fig. 12 shows an arrangement in which part of the rollers is formed with pryramid-shaped features. DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. In Figs. 1 through 7, a finger training device comprises: a grip portion 1 sized such that it can be gripped by one hand; and a roller supporting frame 5 for supporting a roller mounting frame 43 in such a manner that the frame 43 can be bent about an axis normal to a roller supporting plane, the roller mounting frame 43 being located at the forward end, as seen in the longitudinal direction, of the grip portion, and comprising two spaced arms 3 and 4. The grip portion 1 and the roller supporting frame 5 are connected together by a suport pin 6 in such a manner that they can be rotated within a predetermined range of angle in the roller 20 direction. Within the grip 1, a positioning frame 7 is supported on said support pin 6, one end 8 of which is catched in a cutout 11 in a stopper plate 10 provided in the roller supporting frame 5. The positioning frame 7 has, at the opposite end 8′ thereof which is particularly formed by a metal, a plurality of depressions 12 formed along an arcuate location. The depressions 12 can be engaged with a tubular body 14 into which a rod-shaped spring 13 is inserted. As shown in Figs. 6, 9 and 10, the rod-shaped spring 13 is inserted into holes 16 on both sides of a U-shaped frame 15 and is held thereby. The U-shaped frame 15 is fixed by means of a holding frame 17 within the grip portion 2. For the sake of conveniently arranging the parts, the support pin 6 extends through holes 18 in the U-shaped frame 15. Consequently, the grip portion body 2 and the roller supporting frame 5 can be rotated about the support pin 6 through a predetermined angle and, when the rod-shaped spring 13 is bent and the tubular body 14 thereon is engaged in one of the depressions 12, said angular position can be held in a stable manner. Between the arms 3 and 4, a pair of rollers 20 having projections and depressions on the periphery in the axial direction is rotatably supported. A gear 21 is secured to one end of each roller 20. The gears 21 mesh with each other such that these rollers 20 will rotate in the opposite directions simultaneously when one of them is rotated by finger tips. As shown in Fig. 12, part of the periphery of each roller 20 may preferably be pyramid-shaped, as shown at 212. The outer arm 4 has a projection 22 provided on the outer surface therof. The projection 22 is provided with a slit which extends in the longitudinal direction of the arm 4, together with a slot 24 which extends along the slit and is connected with the slit at a location above the slit. On the other hand, an elongated pointer member 25 is slidably inserted into the slit 23. The pointer member 25 has a neck portion 26 which is slidable in the slot 24, and a finger applied portion 27 which projects beyond the upper end of the projection 22 and is elongated and extends in the longitudinal direction of the arm 4, these members 26 and 27 being formed integral with an upper part of the member 25. The pointer member 25 can be slid from a position in which it lies along the outer arm 4, to a position in which the forward end of the finger applied portion 27 projects forwardly. The parts including these arms 3 and 4, and the rollers 20 and 20 form together the roller mounting frame 43. As shown in Figs. 6, 7 and 8, a rotary shaft 29 projecting from the upper surface 28 of the roller mounting frame 43 is inserted into a guide tube 31 provided within the roller supporting frame 5 and is prevented from falling out of the guide tube 31 by means of a flange 30 as required. A positioning plate 36 is fixed to the rotary shaft 29. Reference numeral 32 designates a fixing frame which is U-shaped as seen laterally. The fixing frame 32 is fixed in the interior of the roller supporting frame 5. Said positioning plate 36 provided on the rotary shaft 29 is inserted into a gap 37 between upper and lower plates of the fixing frame 32. Further, a ball accomodating recess 33 is provided deep in the gap 37 in the fixing frame 32, with a spring 34 and a ball 35 pressed by this spring 34 being accomodated in the recess 33. The ball 35 can be pressed into and engaged in one of a plurality of recesses 41 provided in the forward end of the positioning plate 36. When the roller mounting frame 43 is rotated about the rotary shaft 29, the ball 35 is brought into pressing engagement in one of the three depressions 41 formed at different angular positions on the forward end of the positioning plate 36, to which position the roller mounting frame 43 can be rotated. It is therefore possible to perform finger training at different angular positions of the grip portion 1 relative to the rollers 20, as.shown in Figs. 3A and 3B; this means that finger training can be performed with the wrist situated adjacent to the grip portion 1 being at different angular positions relative to the finger tips which flip the rollers. Further, training of writing can be performed while a visual point is imagined to be located ahead of the writing utensil and the attention is turned toward such imaginary visual point, so that real conditions under which writing would normally be performed can be well simulated. Each of the rotary shaft 29 and the fixing frame 32 may be arranged in an opposite relation relative to the roller mounting frame 43 and the roller supporting frame 5. The finger training device of the embodiment, having the arrangement described above, can be gripped when the grip portion body 2 and the roller supporting frame 5 are in a rotated position about the support axis 6 through a predetermined angle. In addition, the roller mounting frame 43 can be moved by rotating it about the rotary shaft 29 through a predetermined angle. Therefore, the user can train the fingers while simulating various conditions in which the user grips a writing utensil such as a fountain pen or pencil in different manners. As described above, the finger training device according to the present invention can be effectively used to perform training of finger tips, thereby to stimulate the brain for preventing its aging, by rotating the rollers with the finger tips while gripping the grip portion in one hand. It is moreover effective for the rehabilitation of physically handicapped or advanced-aged persons. Furthermore, the finger training device has various advantages of, e.g., improving the faculty of writing. In particular, in the finger training device according to the present invention, the arrangement is such that the roller mounting frame can be rotated through a predetermined angle relative to the grip portion body and to the roller supporting frame, whereby the angle of the wrist and finger tips can be changed during training so that finger training can be readily performed in a manner adapted to the conditions under which a writing utensil is really gripped for use. In addition, assumption of said angle makes it easier to imagine and ascertain the visual point looking at the tip of the writing utensil. Next, the arrangement within the grip portion body 2 will be described. As shown in Fig. 6, the grip portion body 2 has an opening 281 formed in a lower portion thereof. Through this opening 281, a finger applied frame 301 can be moved out of the grip portion body 2. The finger applied frame 301 is essentially in the form of a rectangle, as shown in Fig. 11, and has a recessed cut-out 311 on an upper portion thereof on one side. A spring 321 is provided on a pivot 331 within the grip portion body 2 at one corner thereof, as shown in Fig. 6. One end 341 of the spring is in contact with the upper surface of the finger applied frame 301 and the other end 351 is in contact with an upper portion within the grip portion body 2, whereby the finger applied frame 301 is urged downward to project out of the opening 281. Within the grip portion body 2, a slider 371 is provided, which is urged laterally of the finger applied frame 301 by a spring 361 and which is movable essentially in a direction perpendicular to the direction in which the finger applied frame 301 is movable. When a stopper 381 projecting from one side of the slider 371 is located in the recessed cut-out 311 in the finger applied frame 301, said finger applied frame 301 is in a position in which it can project out of said opening 281. Reference numeral 401 designates a guide hole provided in the grip portion body 2; 411 a slider operating plate provided on the outside of the grip portion body 2; and 421 a screw member loosely fitted in said guide holes 401 and interconnecting the slider operating plate 411 and a projection 451 of the slider 371. Therefore, when the finger applied frame 301 has been accomodated in the grip portion body 2 against the spring 321, the stopper 381 is in a position away from the lower edge 431 on one side of the recessed cut-out 311, as shown in Fig. 6, and, therefore, the finger applied frame 301 can be maintained in the accomodated position. The slider operating plate 411 is then operated against the action of the spring 361 to bring the stopper 381 into the recessed cut-out 311, whereby it becomes possible to cause the finger applied frame 301 to project out of the opening 281, as shown by broken lines in Fig. 6. If the finger applied frame 301 is to be accomodated after it has projected out of the opening 281, the frame 301 may be pressed upward by hand against the spring 361 without requiring the operation of the slider operating plate 411. When the finger applied frame 301 is thus pushed up, the edge of the recessed cut-out 311 becomes engaged with an inclined lower surface of the stopper 381 to move it in the reversed direction so that the finger applied frame can be accomodated. Next, the operation will be described. The finger training device of the embodiment, having the arrangement described above, can be gripped when the grip portion body 2 and the roller mounting frame 5 are in a rotated position about the support axis 6 through a predetermined angle in a plane parallel to the roller 20 mounting plane, so that the user can train the fingers while simulating various conditions in which the user grips a writing utensil such as a fountain pen or pencil in different manners. In addition the rollers 20 can be flipped by finger tips to perform training when the grip portion 1 is gripped, as shown in Figs. 3A and 3B, with the finger applied frame 30 then projecting out of the opening 28 in the bottom of the grip portion body 2. Then, the finger training device will not fall off from the hand because of the presence of part of the fingers within the finger applied frame 30. When an elastic pad 500 is applied to grip portion 1, the device advantageously becomes easy to grip. As described above, the finger training device according to the present invention may be used by gripping it and applying the pyramid-shaped projections of the rollers against various parts of the body for stimulating physiologically effective spots thereon, or may be used for giving a massage so as to enhance the circulation of blood to enhance the health. Further, the finger training device can be used by rotating the rollers with finger tips to stimulate physiologically effective spots on the finger tips and perform effective trainingf of the finger tips, stimulating the brain to prevent aging. Further, it is effective for the rehabilitation of physically handicapped or advanced-aged persons. Since in the finger training device according to the present invention the roller mounting frame is rotatable through a predetermined angle relative to the grip portion body and roller supporting frame, an advantage is achieved in that the device can be deformed so that it can be gripped in the most suitable manner. Owing to the provision of the finger applied frame within the grip portion body, the finger training device according to the present invention has the following advantages: (a) since the little and medical fingers can be positioned in the finger applied frame, they can exert firm and steady gripping forces and, hence, the device is particularly effective when used for the rehabilitation of physically handicapped or advanced-aged persons. (b) Since firm and steady gripping can be effected to the grip portion, and unintentional movement of the grip portion so gripped cannot significantly occur, the roller can be smoothly rotated. Fine or delicate movement of finger tips thus becomes possible. The device is therefore expected to have higher effects to the training of writing letters, as compared to earlier devices. (c) The device is also arranged to enhance skin friction, thereby to assume the role of preventing skidding.

Claims: A finger training device comprising: a grip portion (1) which can be gripped by one hand; a roller supporting frame (5) provided at the forward end, as seen in the longitudinal direction, of the grip portion; a pair of arms (3,4) projecting from such roller supporting frame (5) in the same lateral direction relative to the longitudinal direction of said grip portion (1); and a pair of rollers (20) juxtaposed between the pair of arms (3,4) and having projections and depressions (212) on the periphery of each of the rollers, each of the rollers having a gear (21) at one end thereof, said gears (21) meshing with each other so that they can rotate in opposite directions, said finger training device being characterized in that the roller supporting frame (5) is supported by the grip portion (1) in such a manner that the roller supporting frame (5) can be bent to at least two positions in the roller direction. The finger training device as claimed in claim 1 wherein the roller supporting frame (5) is provided with a roller mounting frame (43) which roller mounting frame (43) can be bent about an axis normal to a supporting plane defined by the axes of the two rollers (20). The finger training device as claimed in claim 1 or claim 2 wherein the rollers have pyramid-shaped projections (212) and depressions on at least part of the periphery. The finger training device as claimed in any one of the preceding claims wherein an elastic pad (500) is applied to the grip portion (1). The finger training device as claimed in any one of the preceding claims wherein a finger applied frame (301) is provided within the grip portion (1) in such a manner that it can be extended out of and retracted into the grip portion (1).

Inventors: SATO ATUHIKO, SATO, ATUHIKO
Applicants: SATO ATUHIKO, SATO, ATUHIKO
Application year: 1990
Main classification: A63B23
IPC codes: A63B23