Claims
- 1. A key comprising:a swingable key body formed with an embedding hole; and a weight made of a composite material produced by blending a plurality of kinds of materials except for lead in a predetermined blending proportion so as to have a predetermined specific gravity, said weight being removably attached to said embedding hole of said key body, wherein one of said plurality of kinds of materials comprises an elastic material, so that said weight has elasticity, and is removably attached to said embedding hole of said key body through press fitting wherein said elastic material comprises rubber, and another one of said plurality of kinds of materials comprises powdered tungsten.
- 2. A key according to claim 2, wherein said weight comprises a plurality of types of weights made by blending said elastic material and said other one of said plurality of kinds of material in different blending proportions from one another to have different specific gravities from one another.
- 3. A key according to claim 2, wherein said key body comprises a plurality of key bodies which are formed with said embedding holes of a shape and size identical to one another, respectively, wherein said plurality of types of weights have the shape and size identical to one another, permitting said weights to be removably press fitted into said embedding holes.
- 4. A key comprising:a swingable key body formed with an embedding hole; a weight made of a composite material produced by blending a plurality of kinds of materials except for lead in a predetermined blending proportion so as to have a predetermined specific gravity, said weight being removably attached to said embedding hole of said key body; and a weight attaching member made of an elastic material in the shape of a sleeve having an inserting hole, wherein said weight is fitted into said inserting hole of said weight attaching member, and removably fitted into said embedding hole of said key body through said weight attaching member.
- 5. A key according to claim 4, wherein said plurality of kinds of materials include powdered tungsten and plastic, and said elastic material comprises rubber.
- 6. A key according to claim 4 or 5, wherein said weight comprises a plurality of types of weights which are made of a composite material produced by blending said plurality of kinds of materials except for lead in different blending proportions from one another so as to have different specific gravities from one another, and have a size and a shape identical to one another.
- 7. A key comprising:a swingable key body formed with an embedding hole; and a weight fitted in said embedding hole of said key body, wherein said weight has a weight attaching member made of heat shrinkable plastic in the shape of a sleeve having a predetermined size, and a weight body made of a predetermined metal material except for lead in the shape of a cylinder having a predetermined size, accommodated in said thermally shrunk weight attaching member in close contact therewith.
- 8. A key according to claim 7, wherein said heat shrinkable plastic has elasticity.
- 9. A key comprising:a swingable key body formed with an embedding hole; and a weight made of a molded composite material produced by blending a metal except for lead and plastic in a predetermined blending proportion to have a predetermined specific gravity, and embedded in said embedding hole to be attached to said key body, wherein said embedding hole is formed in a circular hole, and said weight is formed in the shape of a cylinder which is adapted to be press fitted into said embedding hole, and has a convex element on the outer peripheral face thereof to reduce a frictional resistance when said weight is press fitted into said embedding hole.
- 10. A key according to claim 9, wherein said metal except for lead comprises powdered tungsten, and said plastic comprises nylon.
- 11. A key according to claim 9, wherein said weight comprises a plurality of types of weights made of a plurality of kinds of composite materials having different specific gravities from one another, produced by blending said metal except for lead and said plastic in different blending proportions from one another.
- 12. A key according to claim 9, wherein said convex element comprises a plurality of protrusions formed on the outer peripheral face of said weight and spaced apart from one another.
- 13. A key according to claim 9, wherein said convex element comprises two flanges formed on both ends of the outer peripheral face of said weight along a circumferential direction.
- 14. A key according to claim 9, wherein said convex element comprises a plurality of elastic protrusive pieces arranged on both ends of the outer peripheral face of said weight and spaced apart from each other in a circumferential direction, said elastic protrusive pieces extending outward in the axial direction, and being stuck out in a radial direction.
- 15. A key according to claim 9, wherein said convex element comprises a plurality of circumferentially extending larger diameter portions arranged at positions except for both ends of the outer peripheral face of said weight, and spaced apart in the axial direction.
- 16. A key according to claim 9, wherein convex element comprises a large number of axially extending convex bars arranged on the outer peripheral face of said weight, and spaced apart in the circumferential direction.
- 17. A key comprising:a swingable key body having a rectangular cross section, extending in the longitudinal direction, and formed with a recess in a front region of the top face thereof and along the same; a plate-shaped weight made of a composite material produced by blending a plurality of kinds of materials except for lead having different specific gravities from one another, accommodated in said recess of said key body to impart a weight to said key body; and a key cover attached on the front region of said key body so as to cover said weight.
- 18. A key according to claim 17, wherein said key body is formed with an embedding hole on a side face of said key body at a longitudinal position determined in accordance with a touch load given by said weight, wherein said key further comprises a weight for adjustment made of a material except for lead, having a predetermined weight, and embedded in said embedding hole for adjusting the touch load.
- 19. A key according to claim 17, wherein said weight comprises a plurality of weights having different weights from one another.
- 20. A key according to claim 19, said plurality of types of weights are respectively made of composite materials having different specific gravities from one another, produced by blending said plurality of kinds of materials in different blending proportions from one another, and have a size and a shape identical to one another complementary to said recess of said key body.
- 21. A key comprising:a swingable key body; a sharp key cover having a cavity open to below, and attached on the top face of said key body; and a weight made of a composite material produced by blending a plurality of kinds of materials except for lead having different specific gravities from one another, and accommodated in said cavity of said sharp key cover to impart a weight to said key body.
- 22. A key according to claim 21, wherein said weight is molded into a predetermined size and shape corresponding to said cavity of said sharp key cover, and fitted in said cavity.
- 23. A key according to claim 21 or 22, wherein said weight comprises a plurality of types of weights having different weights from one another.
- 24. A key according to claim 23, wherein said plurality of types of weights have different sizes from one another.
- 25. A key according to claim 23, said plurality of types of weights are respectively made of composite materials having different specific gravities from one another, produced by blending said plurality of kinds of materials in different blending proportions from one another.
Priority Claims (6)
Number |
Date |
Country |
Kind |
11-320927 |
Nov 1999 |
JP |
|
11-328655 |
Nov 1999 |
JP |
|
11-328656 |
Nov 1999 |
JP |
|
11-334648 |
Nov 1999 |
JP |
|
11-348087 |
Dec 1999 |
JP |
|
2000-000799 |
Jan 2000 |
JP |
|
Parent Case Info
This application claims the benefit of Provisional Application No. 60/247,032 filed Nov. 13, 2000.
US Referenced Citations (4)
Foreign Referenced Citations (3)
Number |
Date |
Country |
11-184457 |
Jul 1999 |
JP |
11-212543 |
Aug 1999 |
JP |
184055 |
Jul 2001 |
JP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/247032 |
Nov 2000 |
US |