Rotatable hand exerciser

[0002] The present invention relates to a hand exerciser that has a hollow sphere in which a cruciform member is connected and a weight is eccentrically connected. The sphere includes two handles and massage portions for hands to hold.

[0003] Conventional exercising devices are bulky and heavy, and includes complicated structure which usually means a high cost. People usually cannot afford to buy the different types of exercising devices and there is no space for these exercising devices. For those people work in offices, it is important to exercise their hand muscles because of the long time of operating computers. Unfortunately, in the present market, no proper exercising device is provided for the exercise of hands.

[0004] The present invention intends to provide a hand exerciser that is a sphere and can be held by hand. A weight is eccentrically installed in the sphere so that when rotating the sphere the muscles of hands can be exercised.

[0005] In accordance with one aspect of the present invention, there is provided with a hand exerciser which comprises a hollow sphere with four openings for two handle disks and two massage disks being engaged therewith. A cruciform member is supported in the sphere and the handle disks and the two massage disks are rotatably connected to four ends of the cruciform member. A rod extends from a center of the cruciform member and a spring is mounted to the rod. A tube is rotatably mounted to the rod and biased by the spring. A weight is connected to a lateral rod extending from the tube.

[0006] The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

[0007] FIG. 1 is an exploded view to show the hand exerciser of the present invention;

[0008] FIG. 2 is a perspective view to show the hand exerciser of the present invention;

[0009] FIG. 3 shows two hands holding the handle disks of the hand exerciser of the present invention;

[0010] FIG. 4 shows two palms pressing on the handle disks of the hand exerciser of the present invention;

[0011] FIG. 5 shows two hands pressing the massage disks of the hand exerciser of the present invention;

[0012] FIG. 6 shows the weight is adjusted at different positions, and

[0013] FIG. 7 shows the indication needle is rotated an angle when the positions of the weight are adjusted.

[0014] Referring to FIGS. 1 and 2, the hand exerciser of the present invention comprises a hollow sphere 10 which is composed of two halves 11, 12. A plurality of support ridges 115/123 extend from an inside of each of the two halves 11, 12, and a cruciform member 20 is positioned between the support ridges 115 and 123 of the two halves 11, 12. Each half 11/12 includes four semi-circular recess 111/121 so as to define four openings when the two halves 11, 12 are connected with each other. A plurality of positioning tubes 112 and 122 respectively extend from the inside of the two halves 11, 12 and bolts extending through the two halves 11, 12 and the aligned positioning tubes 112, 122 to connect the two halves 11, 12. An aperture 113 is defined through a wall of the sphere 10 and a plurality of notches 114 are defined in a lower edge of periphery defining the aperture 113. The notches 114 have different depths.

[0015] Two handle disks 50 are rotatably connected to two opposite ends of the cruciform member 20 and engaged with two openings of the sphere 10. Two massage disks 40 having massage protrusions 401 are rotatably connected to the other two opposite ends of the cruciform member 20 and engaged with the other two openings of the sphere 10. The handle disks 50 each include a concave surface 501 and a space is defined between the concave surface 501 and the handle 502.

[0016] A rod 201 extends from a center of the cruciform member 20 and a spring 21 is mounted to the rod 201. A tube 30 is rotatably mounted to the rod 201 and biased by the spring 21. A weight 31 is connected to a lateral rod extending from the tube 30. A flange 301 is located on a top of the tube 30 and a boss 303 extends from a top of the flange 301. The boss 303 is engaged with one of the notches 114. An indication needle 302 is connected to the top of the flange 301 so as to indicate the position of the weight 31.

[0017] Referring to FIGS. 3 and 4, the hands of the user may hold the handles 502 to rotate in opposite direction to exercise the wrists. The palms may also to compress the concave surfaces 501 to rotate the handle disks 50. Referring to FIG. 5, hands may also compress the massage disks 40 to rotate the massage disks 40 in opposite directions.

[0018] Referring to FIGS. 6 and 7, the indication needle 302 can be pushed downward to compress the spring 21 and disengage the boss 303 from the notch 114. The indication needle 302 is then rotated an angle and to re-engage the boss 303 to another notch 114 with different depth. By this way, the position of the weight 31 to the cruciform member 20 is adjusted. When the sphere 10 is rotated, the rotation of the weight 31 generates an eccentric force which exercise the muscles of the hands.

[0019] While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.