Abstract:
A club head assembly for a golf club is disclosed, which has a club head having a face defined thereon and a passage defined therein parallel to the longitudinal axis of the face, and a shaft having a distal end extending and bending therefrom with a predetermined angle, said distal end inserted into and fixedly locked in the passage.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a club head assembly for a golf club, more particularly, to a club head assembly having excellent connectivity between the head and the shaft to avoid the distortion of the head by the torque by the ball at impact during a shot. 
     2. Description of Related Art 
     As shown in FIG. 6, the conventional putter head assembly comprises a club head ( 60 ) having a putting face ( 62 ), a crown ( 64 ) and a shank ( 66 ) integrally extending from the crown ( 64 ), and a shaft ( 50 ) having a distal end inserted into the shank ( 66 ) of the club head ( 60 ). Adhesives are used to firmly attach the distal end of the shaft ( 50 ) into the shank ( 66 ). The putting face ( 62 ) is a plain surface defined to putt a golf ball. The precise putting usually depends on the skill of a player. However, when putting a golf ball, a counteraction force is exerted from the ball to the putting face ( 62 ) resulting in a torque between the putting point and the shank ( 66 ) that destroys the adhesive layer in the shank ( 62 ) and causes the putting face ( 62 ) to rotate relative to the distal end of the shaft ( 50 ). A problem of misalignment of the club head ( 40 ) relative to the shaft ( 50 ) likely occurs without being perceived by the player so that an error in putting occurs. 
     Similarly, misalignment of the club head ( 70 ) of a wood or of the head body ( 80 ) of an iron (see FIG.  7  and FIG. 8) relative to the shaft also occurs. In the case where the oblique of the head is found in a wood, the trajectory of the golf ball hit by such an oblique head will be off-line away from the player instead of being straight. 
     SUMMARY OF THE INVENTION 
     The objective of the present invention is to provide a club head assembly for a golf club capable of retaining precise alignment when hitting or putting a golf ball. 
     To achieve the objective, the club head assembly for a golf club in accordance with the present invention comprises a club head having a face and a longitudinal passage defined therein parallel to the longitudinal axis of the face, and a shaft having a distal end inserted into and fixedly locked in the longitudinal passage. 
     Other objectives, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of a “wood” club head assembly for a golf club in accordance with the present invention; 
     FIG. 2 is an exploded perspective view of the club head assembly in FIG. 1; 
     FIG. 3 is a cross-sectional front plain view of the club head assembly in FIG. 1; 
     FIG. 4 is an exploded perspective view of an “iron” club head assembly in accordance with the present invention; 
     FIG. 5 is an exploded perspective view of a putter club head assembly in accordance with the present invention; 
     FIG. 6 is an exploded perspective view of a putter head assembly in accordance with the prior art; 
     FIG. 7 is a perspective view of a “wood” club head assembly in accordance with the prior art; and 
     FIG. 8 is a perspective view of an “iron” club head assembly in accordance with the prior art. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to FIG. 1 to  3 , the embodiment of the “wood” club head assembly for a golf club in accordance with the present invention comprises a club head ( 10 ) and a shaft ( 20 ). The hollow club head ( 10 ) has a hitting face ( 14 ), a surrounding wall ( 13 ) connecting to the sides and bottom of the hitting face ( 14 ), a passage extending inside the head body ( 10 ), a crown ( 12 ) and a foot ( 16 ) connected by the surrounding wall ( 13 ). 
     The hitting face ( 14 ) is a plane face used to contact and hit a golf ball and has a longitudinal axis. 
     The passage is formed by two tubes ( 124 ,  126 ) that are integrally formed on the surrounding wall ( 13 ) near the joint of the face ( 14 ) and the surrounding wall ( 13 ), and respectively extends inside the head body ( 10 ). The two tubes ( 124 ,  126 ) are aligned with each other and have a longitudinal axis parallel to the longitudinal axis of the hitting face ( 14 ). The tube ( 124 ) also has an inlet on the surface of the head body ( 10 ). 
     A recess ( 122 ) is defined on one side of the crown ( 12 ) to receive one part of the shaft ( 20 ). 
     The foot ( 16 ) may be integrally formed with the surrounding wall ( 13 ) or be a separate piece connected to the surrounding wall ( 13 ). 
     The shaft ( 20 ) has a distal end ( 22 ) extending and bending therefrom at a predetermined angle. The distal end ( 22 ) can be inserted, from the inlet of the tube ( 124 ), into the passage of the head body ( 10 ) formed by the two tubes ( 124 ,  126 ) with the vertical part of the shaft ( 20 ) received in the recess ( 122 ). Then, locking means such as adhesives or screws can further be used to fix the distal end ( 22 ) in the tubes ( 124 ,  126 ). 
     In a variation of the embodiment in FIGS. 1 to  3 , the corresponding ends of the two tubes ( 124 ,  126 ) can be extended toward each other to form a single tube (not shown). 
     In another variation of the embodiment in FIGS. 1 to  3 , the club head ( 10 ) can be solid with a passage extending along its longitudinal axis and having an inlet on a surface of the head body ( 10 ). 
     With reference to FIG. 4, another embodiment of the club head assembly for a golf club comprises an “iron” club head ( 30 ) and a shaft ( 20 ). The club head ( 30 ) is a plate having a face ( 34 ), two tubes ( 324 ,  326 ) integrally formed on the rear face of the plate and a semi-collar ( 33 ) extending from an edge of the face ( 10 ) near the tube ( 324 ). 
     The semi-collar ( 33 ) is curved to receive one part of the shaft ( 20 ). The longitudinal axis of the semi-collar ( 33 ) is oblique to that of the hitting face ( 34 ) with a predetermined angle. 
     The longitudinal axes of the two tubes ( 324 ,  326 ) are aligned with each other and are parallel to the hitting face ( 34 ). A passage is formed between the two tubes ( 324 ,  326 ) with an inlet formed on the tube ( 324 ). 
     The shaft ( 20 ) has a neck ( 201 ) integrally extending and bending therefrom with a predetermined angle, and a distal end ( 22 ) extending and bending from the neck ( 201 ) with a predetermined angle. The distal end ( 22 ) can be inserted, from the inlet of the tube ( 324 ), into the passage formed by the two tubes ( 324 ,  326 ) with a part of the shaft ( 20 ) being received in the semi-collar ( 33 ). 
     Similarly, adhesives or screws can be used to fix the distal end ( 22 ) in the two tubes ( 324 ,  326 ) or the part of the shaft ( 20 ) in the semi-collar ( 33 ). 
     Similarly, the two tubes ( 324 ,  326 ) can be integral to form a single tube. 
     With reference to FIG. 5, a variation of the club head assembly comprises a club head ( 40 ) and a shaft ( 20 ). The club head ( 40 ) is hollow and has a putting face ( 44 ), two horizontal faces ( 42 ) each connecting to one side of the putting face ( 44 ) and two vertical walls ( 43 ) each connecting another side of the putting face ( 44 ). 
     Each of the two vertical walls ( 43 ) has a tube ( 424 ,  426 ) extending into the head body ( 40 ). The longitudinal axes of the two tubes ( 424 ,  426 ) are aligned with each other and parallel to the putting face ( 44 ). The tube ( 424 ) further has a recess ( 4240 ) in one of the horizontal faces ( 42 ) and an inlet formed on one end thereof. 
     The shaft ( 20 ) has a neck ( 21 ) extending and bending therefrom with a predetermined angle and a distal end ( 22 ) extending and bending from the neck ( 21 ). The distal end ( 22 ) can be inserted into the two tubes ( 424 ,  426 ) with a part of the neck ( 21 ) being received in the recess ( 4240 ). Then, adhesives or screws can be used to fix the distal end ( 22 ) in the two tubes ( 424 ,  426 ). With the club head assembly for golf club, the problems of head oblique found in prior art will be obviated because the face is supported by the parallel distal end. Therefore, when hitting a golf ball the face will not be oblique when it comes in contact with the ball, such that the precision in striking the ball will be excellent. Additionally, the distal end can reinforce the face to amplify the force exerted by the face when hitting. 
     Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.