Golf club

A golf club comprising:

• a shaft;
• a head having a hosel hole;
• a sleeve fixed to a tip end portion of the shaft;
• and
• a screw capable of being screw-connected to the sleeve, wherein:
• the sleeve includes at least one engaging projection part;
• the head includes at least one engaging recess part;
• a rotation of the sleeve with respect to the hosel hole is regulated based on an engagement between the engaging projection part and the engaging recess part;
• a falling-off of the sleeve from the hosel hole is regulated based on a connection between the screw and the sleeve inserted to the hosel hole;
• the engaging projection part includes a first side surface located on a side which receives a rotating force caused by hitting, a second side surface located on an opposite side to the first side surface, and an outer surface extending between the first side surface and the second side surface;
• the engaging recess part includes a first opposed surface opposed to the first side surface, a second opposed surface opposed to the second side surface, and an inner surface opposed to the outer surface;
• the engaging projection part includes a tapered projection part formed such that a distance between the first side surface and the second side surface decreases toward a tip end of the sleeve;
• a maximum width of the tapered projection part is equal to or greater than an opening width of the engaging recess part;
• at least one of the first side surface and the first opposed surface extends along the axial direction;
• and
• the engaging recess part includes a tapered recess part formed such that a distance between the first opposed surface and the second opposed surface decreases toward the tip end of the sleeve.

A golf club comprising:

• a shaft;
• a head having a hosel hole;
• a sleeve fixed to a tip end portion of the shaft;
• and
• a screw capable of being screw-connected to the sleeve, wherein:
• the sleeve includes at least one engaging projection part;
• the head includes at least one engaging recess part;
• a rotation of the sleeve with respect to the hosel hole is regulated based on an engagement between the engaging projection part and the engaging recess part;
• a falling-off of the sleeve from the hosel hole is regulated based on a connection between the screw and the sleeve inserted to the hosel hole;
• the engaging projection part includes a first side surface located on a side which receives a rotating force caused by hitting, a second side surface located on an opposite side to the first side surface, and an outer surface extending between the first side surface and the second side surface;
• the engaging recess part includes a first opposed surface opposed to the first side surface, a second opposed surface opposed to the second side surface, and an inner surface opposed to the outer surface;
• the engaging projection part includes a tapered projection part formed such that a distance between the first side surface and the second side surface decreases toward a tip end of the sleeve;
• a maximum width of the tapered projection part is equal to or greater than an opening width of the engaging recess part;
• at least one of the first side surface and the first opposed surface extends along the axial direction;
• and
• the inner surface includes an inner inclination surface inclined so as to go toward a radial-direction inner side as approaching to the tip end of the sleeve.

A golf club comprising:

• a shaft;
• a head having a hosel hole;
• a sleeve fixed to a tip end portion of the shaft;
• and
• a screw capable of being screw-connected to the sleeve, wherein:
• the sleeve includes at least one engaging projection part;
• the head includes at least one engaging recess part;
• a rotation of the sleeve with respect to the hosel hole is regulated based on an engagement between the engaging projection part and the engaging recess part;
• a falling-off of the sleeve from the hosel hole is regulated based on a connection between the screw and the sleeve inserted to the hosel hole;
• the engaging projection part includes a first side surface located on a side which receives a rotating force caused by hitting, a second side surface located on an opposite side to the first side surface, and an outer surface extending between the first side surface and the second side surface;
• the engaging recess part includes a first opposed surface opposed to the first side surface, a second opposed surface opposed to the second side surface, and an inner surface opposed to the outer surface;
• the engaging projection part includes a tapered projection part formed such that a distance between the first side surface and the second side surface decreases toward a tip end of the sleeve;
• a maximum width of the tapered projection part is equal to or greater than an opening width of the engaging recess part;
• at least one of the first side surface and the first opposed surface extends along the axial direction;
• and
• in a connected state where the sleeve is fixed to the head by tightening the screw, a contact pressure between the first side surface and the first opposed surface is produced because of an axial force of the screw.

A golf club comprising:

• a shaft;
• a head having a hosel hole;
• a sleeve fixed to a tip end portion of the shaft;
• and
• a screw capable of being screw-connected to the sleeve, wherein:
• the sleeve includes at least one engaging projection part;
• the head includes at least one engaging recess part;
• a rotation of the sleeve with respect to the hosel hole is regulated based on an engagement between the engaging projection part and the engaging recess part;
• a falling-off of the sleeve from the hosel hole is regulated based on a connection between the screw and the sleeve inserted to the hosel hole;
• the engaging projection part includes a first side surface located on a side which receives a rotating force caused by hitting, a second side surface located on an opposite side to the first side surface, and an outer surface extending between the first side surface and the second side surface;
• the engaging recess part includes a first opposed surface opposed to the first side surface, a second opposed surface opposed to the second side surface, and an inner surface opposed to the outer surface;
• the engaging projection part includes a tapered projection part formed such that a distance between the first side surface and the second side surface decreases toward a tip end of the sleeve;
• a maximum width of the tapered projection part is equal to or greater than an opening width of the engaging recess part;
• at least one of the first side surface and the first opposed surface extends along the axial direction;
• the outer surface includes an outer inclination surface inclined so as to go toward a radial-direction inner side as approaching to the tip end of the sleeve;
• the inner surface includes an inner inclination surface inclined so as to go toward the radial-direction inner side as approaching to the tip end of the sleeve;
• and
• in a connected state where the sleeve is fixed to the head by tightening the screw, a contact pressure between the outer inclination surface and the inner inclination surface is produced because of an axial force of the screw.