Golf club grip and golf club using the same

1. A golf club grip comprising:

a grip body including a grip cylinder portion shaped like a cylinder and receiving one end of a cylindrical shaft therein;

a grip end portion disposed at one end of the grip cylinder portion and formed with a through-hole for communicating a grip interior with the outside;

a vibration absorption member formed from a viscoelastic material admixed with a powdery metal of high specific gravity of 10 or more, formed separately from the grip body, and removably attached to the grip body, wherein

the vibration absorption member includes a base portion and a projection formed integrally with the base portion, and the projection extends through the through-hole of the grip end portion and projects inwardly of the grip cylinder portion; and wherein

the grip body has (1) an annular step portion extending along the overall circumference of an outside edge of the one end of the grip body and having a height and (2) a recess inside the annular step portion for housing therein the base portion of the vibration absorption member, the vibration absorption member being attached to the grip body in such a way that an inner side of the base portion of the vibration absorption member is in abutment against a bottom surface of the recess.

2. A golf club grip according to claim 1 , wherein the vibration absorption member is removably attached to the grip body by way of fit-engagement with the grip body.

3. A golf club grip according to claim 2 , wherein the projection is shaped like a bar, having a complex elastic modulus of 2.0×10 7 dyn/cm 2 or more and 1.0×10 10 dyn/cm 2 or less as determined at temperature of 0 to 10° C. and at a frequency of 10 Hz, a mass of 0.7 g or more and 6 g or less, and a length of 8 mm or more and 40 mm or less.

4. A golf club grip according to claim 1 , wherein the projection is shaped like a bar, having a complex elastic modulus of 2.0×10 7 dyn/cm 2 or more and 1.0×10 10 dyn/cm 2 or less as determined at temperature of 0 to 10° C. and at a frequency of 10 Hz, a mass of 0.7 g or more and 6 g or less, and a length of 8 mm or more and 40 mm or less.

5. A golf club grip according to claim 3 , wherein the vibration absorption member is formed from a visceLastic material admixed with a powdery metal of high specific gravity of 7 or more.

6. A golf club grip according to claim 1 , wherein the vibration absorption member is formed from a viscoelastic material admixed with a powdery metal of high specific gravity of 7 or more.

7. A golf club grip according to claim 1 , wherein the inner side of the base portion of the vibration absorption member is perfectly in abutment against the bottom surface of the recess.

8. A golf club grip according to claim 1 , wherein the vibration absorption member is removably attached to the grip body by way of fit-engagement with the grip body.

9. A golf club grip according to claim 1 , wherein the projection is shaped like a bar, having a complex elastic modulus of 2.0×10 7 dynlcm 2 or more and 1.0×10 10 dyn/cm 2 or less as determined at temperature of 0 to 10° C. and at a frequency of 10 Hz, a mass of 0.7 g or more and 6 g or less, and a length of 8 mm or more and 40 mm or less.

10. A golf club comprising:

a grip body including a cylindrical grip cylinder portion;

a grip end portion disposed at one end of the grip cylinder portion and formed with a through-hole for communicating a grip interior with the outside;

a vibration absorption member formed from a viscoelastic material admixed with a powdery metal of high specific gravity of 10 or more, formed separately from the grip body and removably attached to the grip body;

a cylindrical shaft having one end inserted in the grip cylinder portion; and

a golf club head attached to the other end of the shaft, wherein

the vibration absorption member includes a base portion and a projection formed integrally with the base portion, and the projection extends through the through-hole of the grip end portion and projects inwardly of the shaft without contacting an inside surface of the shaft; and wherein

the grip body has (1) an annular step portion extending along the overall circumference of an outside edge of the one end of the grip body and having a height and (2) a recess inside the annular step portion for housing therein a base portion of the vibration absorption member, the vibration absorption member being attached to the grip body in such a way that an inner side of the base portion of the vibration absorption member is in abutment against a bottom surface of the recess.

11. A golf club grip comprising:

a grip body including a grip cylinder portion shaped like a cylinder and receiving one end of a cylindrical shaft;

a grip end portion disposed at one end of the grip cylinder portion and formed with a through-hole for communicating a grip interior with the outside; and a vibration absorption member formed from a viscoelastic material admixed with a powdery metal of high specific gravity of 10 or more formed separately from the grip body, and removably attached to the grip body; wherein the grip body has (1) an annular step portion extending along the overall circumference of an outside edge of the one end of the grip body and having a height and (2) a recess inside the annular step portion for housing therein a base portion of the vibration absorption member, the vibration absorption member being attached to the grip body in such a way that an inner side of the base portion of the vibration absorption member is in abutment against a bottom surface of the recess; and

the vibration absorption member includes a base portion and a projection formed integrally with the base portion, and the projection extends through the through-hole of the grip end portion and projects inwardly of the grip cylinder portion; and wherein the removable attachment of the vibration absorption member to the grip body is effected by one of the following:

a) an interference fit between the projection and the through-hole;

b) an interference fit between an outer edge surface of the base portion and a confronting inner surface of the annular step portion;

c) a separate member that presses on an outer side of the vibration absorption member;

d) hook and loop fasteners;

e) magnets; and

f) a threaded connection between the vibration absorption member and the grip body.

12. A golf club comprising:

a grip body including a cylindrical grip cylinder portion;

a grip end portion disposed at one end of the grip cylinder portion and formed with a though-hole for communicating a grip interior with the outside;

a vibration absorption member formed from a viscoelastic material, admixed with a powdery metal of high specific gravity of 10 or more formed separately from the grip body and removably attached to the grip body;

a cylindrical shaft having one end inserted in the grip cylinder portion; and

a golf club head attached to the other end of the shaft; wherein

the grip body has (1) an annular step portion extending along the overall circumference of an outside edge of the one end of the grip body and having a height and (2) a recess inside the annular step portion for housing therein a base portion of the vibration absorption member, the vibration absorption member being attached to the grip body in such a way that an inner side of the base portion of the vibration absorption member is in abutment against a bottom surface of the recess; and wherein

the vibration absorption member includes a base portion and a projection formed integrally with the base portion, and the projection extends though the through-hole of the grip end portion and projects inwardly of the shaft without contacting an inside surface of the shaft; and wherein

the removable attachment of the vibration absorption member to the grip body is effected by one of the following;

g) an interference fit between the projection and the through-hole;

h) an interference fit between an outer edge surface of the base portion and a confronting inner surface of the annular step portion;

i) a separate member that presses on an outer side of the vibration absorption member;

j) hook and loop fasteners;

k) magnets; and

l) a threaded connection between the vibration absorption member and the grip body.