U.S. patent application number 11/290420 was filed with the patent office on 2006-04-20 for golf club head having a cushion channel formed with a varied width and manufacturing method therefor.
This patent application is currently assigned to Fu Sheng Industrial Co., Ltd.. Invention is credited to Yun-Fang Chen.
Application Number | 20060084526 11/290420 |
Document ID | / |
Family ID | 36181486 |
Filed Date | 2006-04-20 |
United States Patent
Application |
20060084526 |
Kind Code |
A1 |
Chen; Yun-Fang |
April 20, 2006 |
Golf club head having a cushion channel formed with a varied width
and manufacturing method therefor
Abstract
A golf club head includes a cushion channel varying in width.
The manufacturing method therefor includes the steps of: forming a
through hole on a surface of a main body; preparing a carbon-fiber
plate formed by carbon-fiber fabrics; providing the cushion channel
between an inner periphery of the through hole and an outer
periphery of the carbon-fiber plate when assembled, and permitting
the cushion channel to form a varied width; filling filler into the
varied width of the cushion channel; precision finishing the
surface of the main body to thereby produce the final product of
the golf club head.
Inventors: |
Chen; Yun-Fang; (Taoyuan
Hsien, TW) |
Correspondence
Address: |
BACON & THOMAS, PLLC
625 SLATERS LANE
FOURTH FLOOR
ALEXANDRIA
VA
22314
US
|
Assignee: |
Fu Sheng Industrial Co.,
Ltd.
Taipei
TW
|
Family ID: |
36181486 |
Appl. No.: |
11/290420 |
Filed: |
December 1, 2005 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
10423989 |
Apr 28, 2003 |
|
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|
11290420 |
Dec 1, 2005 |
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Current U.S.
Class: |
473/345 |
Current CPC
Class: |
A63B 53/0416 20200801;
A63B 2209/023 20130101; A63B 53/0437 20200801; A63B 2209/00
20130101; A63B 60/02 20151001; A63B 53/0466 20130101; A63B
2053/0491 20130101 |
Class at
Publication: |
473/345 |
International
Class: |
A63B 53/04 20060101
A63B053/04 |
Claims
1. A manufacturing method for a golf club head comprising the steps
of: forming at least one through hole on a surface of a main body;
preparing a carbon-fiber plate formed by carbon-fiber fabrics;
providing a cushion channel between an inner periphery of the
through hole and an outer periphery of the carbon-fiber plate when
assembled, and permitting the cushion channel to vary in widths;
and filling filler into the cushion channel.
2. The manufacturing method for the golf club head as defined in
claim 1, further comprising the step of: precision finishing the
surface of the main body to thereby produce the final product of
the golf club head.
3. The welding method for manufacturing the golf club head as
defined in claim 1, wherein a stepped portion is formed on the
inner periphery of the through hole for adhering to the
carbon-fiber plate.
4. The manufacturing method for the golf club head as defined in
claim 3, wherein when the carbon-fiber plate is adhered to the
stepped portion of the through hole, the cushion channel is formed
on the outer periphery of the carbon-fiber plate by CNC
milling.
5. The manufacturing method for the golf club head as defined in
claim 3, wherein when the carbon-fiber plate is adhered to the
stepped portion on the through hole, the cushion channel is formed
on the inner periphery of the through hole by CNC milling.
6. The manufacturing method for the golf club head as defined in
claim 1, wherein a first stepped portion and a second stepped
portion are formed on the through hole, the first stepped portion
is provided for adhering to the carbon-fiber plate; and the cushion
channel is formed by the inner periphery of the through hole, the
second stepped portion, and the outer periphery of the carbon-fiber
plate.
7. The manufacturing method for the golf club head as defined in
claim 6, wherein the first stepped portion and the second stepped
portion are integrally formed on the through hole of the main body
by casting.
8. The manufacturing method for the golf club head as defined in
claim 1, wherein a size of the carbon-fiber plate is smaller than
that of the through hole, and a plurality of short fingers are
provided on the outer periphery of the carbon-fiber plate and
extended outwardly to confront with the inner periphery of the
through hole so as to form the cushion channel therebetween such
that the carbon-fiber plate positioned in the through hole
precisely defines the cushion channel.
9. The manufacturing method for the golf club head as defined in
claim 8, wherein the short fingers are formed on the outer
periphery of a large-size periphery of the carbon-fiber plate by
CNC milling.
10. The manufacturing method for the golf club head as defined in
claim 1, wherein the filler is selected from an elastic colored
material.
11. The manufacturing method for the golf club head as defined in
claim 1, wherein the filler is selected from non-metal
material.
12. The manufacturing method for the golf club head as defined in
claim 1, wherein The carbon-fiber plate can be replaced by another
non-metal plate with low weight and high strength.
13. The manufacturing method for the golf club head as defined in
claim 1, wherein the cushion channel of the golf club head has at
least one turning point where the cushion channel is varying in
width.
14. The manufacturing method for the golf club head as defined in
claim 1, wherein the cushion channel of the golf club head has a
relatively greater width at a predetermined position adjacent to or
beyond a striking plate.
15. A golf club head, comprising: a main body provided with a
striking plate, a crown plate, a sole plate, a side plate; the main
body is formed with at least one through hole; at least one
carbon-fiber plate formed by carbon-fiber fabrics, the carbon-fiber
plate is adapted to adhere to the through hole; a cushion channel
formed between an outer periphery of the carbon-fiber plate and an
inner periphery of the through holes, said cushion channel varying
in width; and a filler filled in the cushion channel.
16. The golf club head as defined in claim 15, wherein a stepped
portion is formed on the inner periphery of the through hole for
adhering to the carbon-fiber plate.
17. The golf club head as defined in claim 15, wherein a first
stepped portion and a second stepped portion are formed on the
through hole, the first stepped portion is provided for adhering to
the carbon-fiber plate; and the cushion channel is formed by the
inner periphery of the through hole, the second stepped portion,
and the outer periphery of the carbon-fiber plate.
18. The golf club head as defined in claim 15, wherein a plurality
of short fingers are provided on the outer periphery of the
carbon-fiber plate and extended outwardly to confront with the
inner periphery of the through hole.
19. The golf club head as defined in claim 15, wherein the filler
is selected from an elastic colored material.
20. The golf club head as defined in claim 15, wherein the filler
is selected from non-metal material.
21. The golf club head as defined in claim 15, wherein the cushion
channel of the golf club head has at least one turning point where
the cushion channel is varying in width.
22. The golf club head as defined in claim 15, wherein the cushion
channel of the golf club head has a relatively greater width at a
predetermined position adjacent to or beyond the striking plate.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation-in-part application of
U.S. patent Ser. No. 10/423,989, filed on Apr. 28, 2003.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a golf club head having a
cushion channel and a manufacturing method therefor. Particularly,
the present invention relates to the cushion channel formed between
a through hole of a main body of the golf club head and a prepared
carbon fiber plate. More particularly, the present invention
relates to an elastic colored filler filled in the cushion channel
to prevent from the occurrence of wrinkles or deformation on
peripheries of the through holes and the carbon fiber plates.
[0004] 2. Description of the Related Art
[0005] A conventional golf club head mainly includes a main body
and a striking plate attached thereto, all of which are made of
metal or alloy. The main body is integrally formed as a one-piece
single member by casting. Alternatively, the main body is
constructed from several members consisting of a crown plate, a
sole plate and a side plate by welding. As to the striking plate,
which is attached to a front surface of the main body by
incorporating, welding or embedding. To meet various requirements,
manufactures may change the configuration and the structural
connection of the main body and the striking plate to lower its
center of gravity and also to reduce its total weight. Since the
main body is generally made of metal, the center of gravity and the
total weight of the main body cannot be effectively and
specifically adjusted.
[0006] Another conventional golf club head mainly includes a metal
main body formed with an opening at its top portion and regarded as
a filling portion. Plurality of prepared carbon-fiber fabrics are
piled up to form a carbon fiber plate, and the carbon fiber plate
is used to attach to the opening of the main body in place for
sealing it. The prepared carbon-fiber fabrics have plasticity
before heating and hardening it. Firstly, the main body is placed
in a die assembly and an air-inflating bag is used to support the
prepared carbon-fiber fabrics on the main body so that the main
body can be formed with a carbon-fiber portion. Light material of
the carbon-fiber portion may cause reduction of weight and thus the
center of gravity and the total weight of the main body can be
specifically adjusted. By manufacturing such large-size
carbon-fiber portion, it has sophisticated the manufacture
processes of the prepared carbon-fiber fabrics and prolonged the
manufacture time. In manufacture operation of the carbon-fiber
plate, it reduces the product quality due to irregular and
uncontrollable deformation of the prepared carbon-fiber fabrics in
nature. Moreover, a large area of the prepared carbon-fiber fabrics
may weaken the entire structural strength of the main body, and it
may further make a lower striking sound instead of a sharp striking
sound naturally made by a metal golf club head.
[0007] Another conventional golf club head and the manufacturing
method therefor are shown as FIGS. 1 and 2. A wood-type golf club
head has a main body 10 and a striking plate 11. The main body 10
possesses most of the metal shell thereof but has a plurality of
through holes 12 on the crown plate, the sole plate or the side
plate. The through holes 12 are provided with stepped portions 121
for fitting with a number of prepared and light carbon-fiber plates
20 (or weighting member 30). Therefore, the main body 10 may not
only have a low gravity center, low weight and sharp striking sound
but also have a short manufacture process and better quality. The
main body 10 may change the position of gravity center and entire
weight quickly by adjusting the number, size and weight of the
through holes 12, the carbon-fiber plates 20 and the weighting
member 30. However, when the carbon-fiber plates 20 are closely
fitted with the through holes 12, the interface therebetween easily
deforms frequently, and wrinkles appear thereon. This influences
the appearance and quality of the products of the golf club head.
Therefore, it is necessary to implement and improve the
conventional golf club head and the manufacture method
therefor.
[0008] The present invention intends to provide a golf club head
having a cushion channel and a manufacturing method therefor. In
the present invention, a cushion channel is provided between an
inner periphery of a through hole of the golf club head and an
outer periphery of a carbon-fiber plate. The cushion channel is
provided with a clearance with an appropriate varied width for the
absorbing deformation to reduce the wrinkles and the influence
thereof on the entire structural strength. Moreover, the cushion
channel may also be filled with elastic colored filler to enhance
the appearance of the final product in such a way to mitigate and
overcome the above problem.
SUMMARY OF THE INVENTION
[0009] The primary objective of this invention is to provide a golf
club head having a cushion channel and a manufacturing method
therefor, wherein the cushion channel is provided between an inner
periphery of a through hole of a main body and an outer periphery
of a carbon-fiber plate to form a clearance with an appropriate
varied with for absorbing deformation to reduce the wrinkles and
the influence thereof on the entire structural strength.
[0010] The secondary objective of this invention is to provide the
golf club head having the cushion channel and the manufacturing
method therefor, wherein the cushion channel is provided between
the through holes of the main body and the carbon-fiber plate, and
is filled with elastic colored filler to enhance the appearance of
the final product.
[0011] The manufacturing method for the golf club head in
accordance with an aspect of the present invention comprises the
steps of: forming a through hole on a surface of a main body;
preparing a carbon-fiber plate formed by carbon-fiber fabrics;
providing a cushion channel between an inner periphery of the
through hole and an outer periphery of the carbon-fiber plate when
assembled, and permitting the cushion channel to form a varied
width; filling filler into the varied width of the cushion channel;
precision finishing the surface of the main body to thereby produce
the final product of the golf club head.
[0012] The golf club head in accordance with an aspect of the
present invention includes a main body, a carbon-fiber plate and a
cushion channel. The main body features a through hole and an inner
periphery thereof. The carbon-fiber plate provides with an outer
periphery correspondingly to the inner periphery of the through
hole. When assembled, provided between the inner periphery of the
through hole and the outer periphery of the carbon-fiber plate is
the cushion channel formed with a varied width.
[0013] In a separate aspect of the present invention, the cushion
channel of the golf club head has at least one turning point where
the cushion channel is varying in width for the ease of
manufacture.
[0014] In a further separate aspect of the present invention, the
cushion channel of the golf club head has a relatively greater
width at a predetermined position for absorbing the greater
deformation of the main body while striking a golf ball.
[0015] In a yet further separate aspect of the present invention,
the cushion channel of the golf club head has a relatively greater
width at a predetermined position adjacent to or beyond a striking
plate according to the design need.
[0016] In a yet further separate aspect of the present invention,
the cushion channel of the golf club head is filled with filler for
enhancing the appearance of the final product.
[0017] In a yet further separate aspect of the present invention, a
plurality of short fingers are provided on the outer periphery of
the carbon-fiber plate and extended outwardly to confront with the
inner periphery of the through hole so as to form the cushion
channel therebetween such that the carbon-fiber plate positioned in
the through hole precisely defines the cushion channel.
[0018] In a yet further separate aspect of the present invention, a
stepped portion is formed on the inner periphery of the through
hole to receive the carbon-fiber plate such that the large-size
carbon-fiber plate is adhered to the stepped portion of the through
hole for the ease of manufacture.
[0019] Further scope of the applicability of the present invention
will become apparent from the detailed description given
hereinafter. However, it should be understood that the detailed
description and specific examples, while indicating preferred
embodiments of the invention, are given by way of illustration
only, since various will become apparent to those skilled in the
art from this detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The present invention will become more fully understood from
the detailed description given hereinbelow and the accompanying
drawings which are given by way of illustration only, and thus are
not limitative of the present invention, and wherein:
[0021] FIG. 1 is an exploded perspective view of a conventional
golf club head;
[0022] FIG. 2 is a partially exploded, perspective view of a
conventional golf club head;
[0023] FIG. 3 is a flow chart of the manufacture method of the golf
club head in accordance with the present invention;
[0024] FIG. 4 is a top view of a golf club head having a cushion
channel formed with a varied width in accordance with the first
embodiment of the present invention;
[0025] FIG. 4A is an enlarged top view, in FIG. 4, of a turning
point of the cushion channel of the golf club head in accordance
with the first embodiment of the present invention;
[0026] FIG. 5 is a cross sectional view of the golf club head
having the cushion channel formed between the through hole of the
main body and the carbon-fiber plate in accordance with the first
embodiment of the present invention;
[0027] FIG. 6 is a cross sectional view of the cushion channel of
the golf club head formed between the through hole of the main body
and the carbon-fiber plate in accordance with the first embodiment
of the present invention, which shows the elastic colored filler
filled in the cushion channel;
[0028] FIG. 7 is a cross sectional view of the golf club head
having the cushion channel in accordance with the second embodiment
of the present invention;
[0029] FIG. 8 is a top view of a carbon-fiber plate provided with
short fingers on the peripheral thereof for use in the golf club
head in accordance with the third embodiment of the present
invention;
[0030] FIG. 9 is a side view of the carbon-fiber plate and the
short fingers for use in the golf club head in accordance with the
third embodiment of the present invention;
[0031] FIG. 10 is a top view of the golf club head having the
cushion channel formed with the varied width in accordance with the
third embodiment of the present invention, wherein the cushion
channel is formed by means of the short fingers;
[0032] FIG. 10A is an enlarged top view, in FIG. 10, of a turning
point of the cushion channel of the golf club head in accordance
with the third embodiment of the present invention;
[0033] FIG. 11 is a top view of another golf club head having the
cushion channel formed with the varied width in accordance with the
present invention;
[0034] FIG. 11A is an enlarged top view, in FIG. 11, of a turning
point of the cushion channel of the golf club head in accordance
with the present invention;
[0035] FIG. 12 is a side view, in FIG. 11, of the cushion channel
of the golf club head in accordance with the present invention;
[0036] FIG. 12A is an enlarged top view, in FIG. 12, of another
turning point of the cushion channel of the golf club head in
accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0037] Referring to FIGS. 3, 4 and 4A, the first step of the
manufacture method in accordance with the first embodiment of the
present invention is forming a plurality of through holes 12 on the
surface of the main body 10 of the golf club head. The main body 10
is preferably formed as a single one-piece member by casting and
the material thereof can be selected from a group consisting of
stainless steel, titanium alloy, and iron etc. Generally, a
striking plate 11 is attached to the front of the main body 10 by
welding, integrally forming or embedding. An appropriate amount of
the through holes 12 are formed on the crown plate, the sole plate
or the side plate of the main body 10. A stepped portion 121 is
formed on the peripheral of the through holes 12 for supporting a
carbon-fiber plate 20, a weighting member 30 and a nameplate 40 (as
shown in FIG. 1), which are constructed from predetermined sizes,
in the following procedure.
[0038] Referring to FIGS. 3, 4 and 4A, the second step of the
manufacture method in accordance with the first embodiment in the
present invention is prefabricating a plurality of the carbon-fiber
plate 20 by means of carbon-fiber fabrics for hastening the
following procedure and promoting the quality of the golf club head
product. The present invention utilizes plural layers of plastic
carbon-fiber fabrics cross-stacked in a press block (not shown)
which may press the carbon-fiber fabrics. In a heating process, the
pressed carbon-fiber fabrics are hardened to produce the
carbon-fiber plates 20 having a predetermined size. Preferably, 4
to 10 layers of carbon-fiber fabrics are arranged in the
cross-stacked angle of zero degrees, 90 degrees or .+-.45 degrees
and heating at 130.degree. C. for 20 minutes. In the first
embodiment of the present invention, some sections of the outer
periphery of the carbon-fiber plate 20 have curvatures
approximately equal to those of the inner periphery of the through
hole 12. Therefore, the periphery of the carbon-fiber plate 20 and
the through hole 12 can be milled to thereby form a clearance in
the following process.
[0039] Moreover, as shown in FIGS. 4, 4A and 11 through 12, the
amount, size and weight of the through hole 12, carbon-fiber plate
20 and weight 30 may be changed according to the design choice.
Thereby, the position of gravity center and weight of the main body
10 can be specifically adjusted in the invention. Because the main
body 10 is made of metal, a sharp sound will be made when striking
a golf ball (not shown). In an alternative embodiment, the
carbon-fiber plate 20 can be constructed from other non-metal plate
with lightweight and high strength, e.g. polymer plastic material
and high-strength fiber material.
[0040] Referring to FIGS. 3 through 5, the third step of the
manufacture method in accordance with the first embodiment in the
present invention is providing a cushion channel (identified as
"a") between the outer periphery of the carbon-fiber plate 20 and
the inner periphery of the through hole 12 formed with a varied
width. The cushion channel "a" is provided with a clearance with an
appropriate varied width for the absorbing deformation to reduce
the wrinkles and the influence thereof on the entire structural
strength.
[0041] The carbon-fiber plate 20 in the invention is bonded to the
corresponding through hole 12 of the main body 10 by means of epoxy
resin or the like. Preferably, before or after the bonding, a CNC
milling can be used to remove peripheral portions of the material
of the carbon-fiber plate 20 and the through hole 12 of the main
body 10 so as to form some sections of the cushion channel "a" with
a uniform width in addition to the varied width. Therefore, the
clearance of is adapted to cushion the effect of a striking stress,
thereby reducing the possibility of wrinkles and maintain the
strength of the entire main body 10. The cushion channel "a" can
also be formed between the weighting member 30, the nameplate 40
and the corresponding through holes 12 by a CNC milling
procedure.
[0042] Referring back to FIGS. 4 and 4A, in the illustrated first
embodiment, the cushion channel "a" is provided with a varied width
by varying one of annular edges of the through hole 12 of the main
body 10 and the carbon-fiber plate 20. Preferably, the cushion
channel "a" has relatively greater widths disposed at turning
points 12a. Alternatively, the cushion channel "a" has relatively
greater widths disposed at several positions selected from a front
side portion 12b (i.e. adjacent to striking plate 11) and a rear
side portion 12c (i.e. beyond striking plate 11).
[0043] Referring to FIGS. 3 through 6, the fourth step of the
manufacture method in accordance with the first embodiment in the
present invention is filling the filler (identified as "b") into
the cushion channel "a". When the cushion channel "a" is formed by
a CNC milling procedure, an appropriate amount of the filler "b"
can be filled therein. The filler "b" is preferably selected from
elastic colored filler, especially made from heat plastic color
elastoplasts, e.g. PU paint filler. In an alternative embodiment,
the filler "b" is selected from non-metal material. The filler "b"
is filled in the cushion channel "a" and hardened in the event. The
elasticity and color of the filler "b" may enhance the appearance
and product price of the main body 10 without affecting the cushion
effect. Moreover, as shown in FIGS. 4 and 11-12A, the main body 10
may have various color, lines and patterns by filling different
colored filler "b" in the cushion channel "a", changing the contour
of the through hole 12 and the carbon-fiber plate 20, or forming
the cushion channel "a" with various widths.
[0044] Referring to FIGS. 3 and 4, the fifth step of the
manufacture method in accordance with the first embodiment in the
present invention is processing the main body 10 in a precision
finishing procedure to produce a final product of the golf club
head. When the carbon-fiber plate 20, the weighting member 30 and
the nameplate 40 are bonded to the corresponding through holes 12
of the main body 10, the main body 10 can be polished and finished
by a precision machining process to remove unnecessary resin and
carbon fiber. Then, the painting and packaging process are treating
on the final product of the golf club head to thereby have better
appearance and uniform feature.
[0045] Turning now to FIG. 7, reference numerals of the second
embodiment of the present invention have applied the identical
numerals of the first embodiment, as shown in FIG. 4. The
construction of the golf club head structure in accordance with the
second embodiment of the present invention has similar
configuration and same function as that of the golf club head
structure of the first embodiment and detailed descriptions may be
omitted.
[0046] Referring to FIGS. 3, 4 and 7, the golf club head having the
cushion channel in accordance with the second embodiment of the
present invention is disclosed. As compared with the first
embodiment, the third step of the second embodiment is provided
with a first stepped portion 122 and a second stepped portion 123
connected to the inner periphery of the through hole 12 of the main
body 10 to form the cushion channel "a". The first and second
stepped portions 122, 123 are preferably integrally formed with the
through hole 12 of the main body 10 by casting so that the
carbon-fiber plate 20 may be attached to the first stepped portion
122 by a loose-fitting manner. The inner periphery of the through
hole 12, the second stepped portion 123 and the outer periphery of
the carbon-fiber plate 20 commonly define the cushion channel "a"
varying in width when assembled. The cushion channel "a" provides
with a clearance for the elastic deformation of the carbon-fiber
plate 20 and the through hole 12. Moreover, by referring back to
FIG. 4, various elastic colored fillers "b" can be filled in the
cushion channel "a" so as to promote the appearance and product
price of the main body 10 without affecting the cushion effect.
[0047] In an alternative embodiment, when the carbon-fiber plate 20
is adhered to the stepped portion 122 on the through hole 12, the
cushion channel "a" is formed on the inner periphery of the through
hole 12 by CNC milling the second stepped portion 123, as best
shown in FIG. 7. In another embodiment, when the carbon-fiber plate
20 is adhered to the first stepped portion 122 of the through hole
12, the cushion channel "a" is formed on the outer periphery of the
carbon-fiber plate 20 by CNC milling.
[0048] Furthermore, as shown in FIGS. 11, 11A, 12 and 12A, when the
size of the through holes 12 and the carbon-fiber plate 20 is too
large to form a predetermined longer distance of the cushion
channel "a", a number of disadvantage limitations exist for a CNC
milling process in milling the periphery of the through holes 12
and the carbon plate 20. Alternatively, a first stepped portion 122
and a second stepped portion 123 of the second embodiment in the
present invention, as best shown in FIG. 7, can be used to position
the large-size carbon-fiber plate 20 on the large-size through
holes 12 so as to form a desired, predetermined longer distance of
the cushion channel "a" varying in width.
[0049] Advantageously, the stepped portion 122 of the through hole
12 conveniently receives the carbon-fiber plate 20 such that the
large-size carbon-fiber plate 20 is adhered to the first stepped
portion 122 of the through hole 12 for the ease of manufacture.
Meanwhile, the second stepped portion 123 of the through hole 12
precisely defines the cushion channel "a" varying in width.
[0050] Turning now to FIGS. 8 through 10A, reference numerals of
the third embodiment of the present invention have applied the
identical numerals of the first embodiment, as shown in FIG. 4. The
construction of the golf club head structure in accordance with the
third embodiment of the present invention has similar configuration
and same function as that of the golf club head structure of the
first embodiment and detailed descriptions may be omitted.
[0051] Referring to FIGS. 3, 4 and 8 through 10A, the golf club
head having the cushion channel in accordance with the third
embodiment of the present invention is disclosed. As compared with
the first and second embodiments, the third step of the manufacture
method in the third embodiment is provided with plural short
fingers 21 on the outer periphery of the carbon-fiber plate 20 to
maintain a perfect assembled relationship of the cushion channel
"a". The size of the outer periphery of the carbon-fiber plate 20
in the illustrated third embodiment is slightly smaller than that
of the inner periphery of the through hole 12. When the
carbon-fiber plate 20 is bonded on the stepped portion 121, the
short fingers 21 on the carbon-fiber plate 20 extend outwardly to
confront with the inner periphery of the through hole 12 to form a
cushion channel "a" and a clearance therebetween for cushioning the
striking stress. As shown in FIG. 9, the short fingers 21 can be
integrally formed with the carbon-fiber plate 20 by processing a
CNC milling procedure on a large-size outer periphery of the
carbon-fiber plate 20 so as to form a plurality of outwardly
extended fingers. The thickness of each of the short fingers 21 is
preferably thinner than that of the outer periphery of the
carbon-fiber plate 20 to thereby avoid the short fingers 21
sticking out of the filler "b" from the cushion channel "a".
[0052] Advantageously, the short fingers 21 of the carbon-fiber
plate 20 can provides the cushion channel "a" formed between the
inner periphery of the through hole 12 and the outer periphery of
the carbon-fiber plate 20 such that the carbon-fiber plate 20
positioned in the through hole 12 precisely defines the cushion
channel "a" varying in width.
[0053] As shown in FIGS. 11, 11A, 12 and 12A, the short fingers 21
of the carbon-fiber plate 20 in the third embodiment can also be
adapted to support a large-size carbon-fiber plate 20 on a
large-size through hole 12 for forming cushion channel "a" with
various widths.
[0054] As has been described above, the conventional carbon-fiber
plate 20 is closely fitted with the through hole 12 on the main
body 10, thereby plastic deformation and wrinkles occur constantly,
as shown in FIGS. 1 and 2. However, the golf club head and the
manufacture method therefor in the present invention indeed
maintain the structural strength of the main body 10 and promote
the quality and the product price.
[0055] Although the invention has been described in detail with
reference to its presently preferred embodiment, it will be
understood by one of ordinary skill in the art that various
modifications can be made without departing from the spirit and the
scope of the invention, as set forth in the appended claims.
* * * * *