GB2160466A - Fixing a shaft in the handle of a badminton racket - Google Patents

Fixing a shaft in the handle of a badminton racket Download PDF

Info

Publication number
GB2160466A
GB2160466A GB08415445A GB8415445A GB2160466A GB 2160466 A GB2160466 A GB 2160466A GB 08415445 A GB08415445 A GB 08415445A GB 8415445 A GB8415445 A GB 8415445A GB 2160466 A GB2160466 A GB 2160466A
Authority
GB
United Kingdom
Prior art keywords
handle
shaft
badminton racket
mold
cavity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB08415445A
Other versions
GB8415445D0 (en
Inventor
Hsiu Cheng Hsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WINTIDE SPORTING GOODS CO Ltd
Original Assignee
WINTIDE SPORTING GOODS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WINTIDE SPORTING GOODS CO Ltd filed Critical WINTIDE SPORTING GOODS CO Ltd
Priority to GB08415445A priority Critical patent/GB2160466A/en
Publication of GB8415445D0 publication Critical patent/GB8415445D0/en
Publication of GB2160466A publication Critical patent/GB2160466A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/08—Frames with special construction of the handle
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/08—Handles characterised by the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
    • B29C70/76—Moulding on edges or extremities of the preformed part
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/10—Handles with means for indicating correct holding positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/463—Grips, handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/52—Sports equipment ; Games; Articles for amusement; Toys
    • B29L2031/5245—Rackets

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Fishing Rods (AREA)

Abstract

A method of fixing a shaft in the handle of a badminton racket comprises the steps of: providing a mold (70) having a cavity (63) shaped to define the handle of the badminton racket; positioning a shaft extending at least two thirds of the length of the handle from its front end and substantially along the axis of the cavity; pouring foamable material into the mold; foaming the foamable material in the mold, thereby the shaft is longitudinally embraced by the foamable material to form an embryo handle; removing the embryo handle from the mold. So that, when using the badminton racket having the structure according to this method, to hit a shuttlecock, the force used can be transfered from the handle to the head portion more accurately. <IMAGE>

Description

SPECIFICATION Improved method of fixing shaft in a handle of badminton racket and the product thereof This invention relates to an improved method of fixing a shaft in the handle of a badminton racket, by this method, the shaft can be inserted into the handle at least 2/3 of its length so that when hitting the shuttlecocks the force used can be transferred from the handle to the head portion more accurately.
At present, the badminton racket manufacturers fix the shaft in a wooden handle by drilling a long hole therein and then inserting the shaft into the hole. The connection structure of the shaft and the handle of a badminton racket made by this known method is illustrated with reference to the Figure 1.
Figure 1 is a sectional view showing the connection structure of the shaft and the handle of a know badminton racket. In Figure 1, a shaft 10 made of a long hollow metal tube is inserted into a long hole which is formed in the tip portion of a wooden handle 11. As shown in the Figure 1, the insertion length of the shaft 10 is only about one half of the whole length of the handle 11, that is, usually the long hole is drilled to be 1/2 of the whole length of the handle 11. Besides, normally the material hardness of the shaft 10 is designed to be larger than that of the handle 11, therefore, when using this racket hit shuttlecock, at the point where the shaft 10 and the handle 11 is connected, a stress is formed, this stress will give an undersirable influence on the control efficiency of the shuttlecock.Moreover, the closer the player grips the handle near the end portion or the greater the force use, the greater the stress becomes. In order to solve the above-mentioned defects, drilling a long hole passing through the end portion was considered. However, in practice, there are still problems that have remained unsolved, that is, the length of the handle and the diameter of the shaft have their standard specifications, the length of the handle is required to be 18-19 cm, the diameter of the shaft is required to be 6-8mm. As the manufactur produces the badminton racket by using a drill to open a long hole in a wooden handle, for a 68mm diameter shaft, a long hole of about 6-8mm in diameter is required, namly, a drill of 6-8 mm in diameter must be used.However, the length of the drill depends on the diameter, for a drill of 6-8 in diameter, the length is no more than 84-86 mm, that is to say, when we use a drill of 6-8 mm in diameter to drill a long hole in a wooden handle of 18-19 cm, the obtainable length can only be 1/2 of its whole length. In the case of using a special long drill, because the drill is usually rotated at a very high speed, vibration is produced, the hole drilled is not satisfactory.
It is accordingly a primary object of this invention to provide an improved method of fixing the shaft in the handle of a badminton racket so that the above-mentioned defects can be solved.
According to the present invention, this and other objects are achieved by providing an improved method of fixing the shaft in the handle of a badminton racket, which method includes the steps of: providing a mold having a cavity shaped to define the outer form of a handle of a badminton racket; positioning a shaft extending at least two thirds of the length of the handle from its front end and substantially along the axis of the cavity; pouring a foamable material into the mold; foaming the foamable material in the mould, thereby the shaft is longitudinally embraced by the foamable material to form an embryo handle; removing the embryo handle from the mold.
This object, features, advantages of the present invention will be more apparent in the following description of a preferred embodiment with reference to the accompanying drawings, wherein: Figure l is a sectional view showing a connection structure of the shaft and handle in the prior art; Figure 2 is a schematic view illustrating the manufacturing process of the invention; Figure 3 is a longitudial sectional view showing the connection structure of the shaft and the handle of the badminton racket according to the present invention; Figure 4 is a front view of a badminton racket having the connection structure of Figure 3.
Referring to Figure 2-3, there is shown a preferred embodiment of an improved method of fixing a shaft 30 in the handle of a badminton racket, which method includes the steps of: providing a mold 70 which consists of upper die 61 and lower die 62 each having cavity 63 to form the shape of a handle 50 mutually; putting a cone-shaped ring 53 into the fromt of the cavity and inserting a shaft 30 which is made of hollow metal tube through the ring 53 and the cavity 63 of the lower die 62 with its end portion 31 sticking out above the rear end of the cavity 63; covering the lower die 62 with the upper die 62; pouring liquid polyurethane foam into and letting the foam harden; removing the embryo handle together with the shaft from the cavity; winding a leather cover 54 on the outer periphery of the handle 50; covering the end portion of the handle 50 with a cap 55 having a hole 56 in its center so as to permit the protruding portion 31 to passing through therein and have a plane surface 32 on the bottom of the handle 50 as shown in Figure 3.
Referring to Figure 4 there is shown a badminton racket 2 of the invention which includes a head portion 20, a shaft 30, a throat 40 connected the head portion 20 and the shaft 30 and a handle 50.
The head portion 20 is formed by bending a long hollow tube into the shape as shown, and a plurality of guts are stretched thereon.
Accordingly, as the handle body is made of foamable material and the shaft is substantially extending the entire length of the end portion of the handle, when hitting the shuttlecock the force used can be transfered from the handle to the head portion more accuratly.
While the present invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of this invention as being defined in the appending claims.

Claims (5)

1. An improved method of fixing a shaft in a handle of a badminton racket comprising the steps of: providing a mold having a cavity shaped to define the outer form of a handle of a badminton racket; positioning a shaft extending at least two thirds of the length of said handle from its front end and substantially along an axis of said cavity; pouring foamable material into said mold; foaming said foamable material in said mold, thereby said shaft is longitudinallly embraced by said foambale material to form an embryo handle; removing said embryo handle from said mold.
2. An improved method according to claim 1, wherein said shaft is extending above and fixed at the rear end of said cavity.
3. An improved method according to claim 1, wherein said foam bale material is polyurethane resin.
4. A frame structure of a badminton racket produced according to the method of claim 1 comprising a head portion, a handle, a shaft connected to said handle, a throat portion connecting said head portion and said shaft, which is characterised in that said handle is made of foam bale material and said shaft is substantially extending the whole length of said handle.
5. A frame structure of badminton racket as substantially described hereinbefore with reference to the accompanying drawings.
GB08415445A 1984-06-18 1984-06-18 Fixing a shaft in the handle of a badminton racket Withdrawn GB2160466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08415445A GB2160466A (en) 1984-06-18 1984-06-18 Fixing a shaft in the handle of a badminton racket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08415445A GB2160466A (en) 1984-06-18 1984-06-18 Fixing a shaft in the handle of a badminton racket

Publications (2)

Publication Number Publication Date
GB8415445D0 GB8415445D0 (en) 1984-07-25
GB2160466A true GB2160466A (en) 1985-12-24

Family

ID=10562581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08415445A Withdrawn GB2160466A (en) 1984-06-18 1984-06-18 Fixing a shaft in the handle of a badminton racket

Country Status (1)

Country Link
GB (1) GB2160466A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1738804A3 (en) * 2005-06-29 2007-03-21 Andrea Burkhardt Device and method for the production of a wellness apparatus
EP3646927A1 (en) * 2018-11-02 2020-05-06 Victor Rackets Industrial Corporation Badminton racket

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1078880A (en) * 1965-07-01 1967-08-09 Goodrich Co B F Seine float and method of making same
GB1336826A (en) * 1971-05-12 1973-11-14 Stanley Works Hand tool handle and method for its manufacture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1078880A (en) * 1965-07-01 1967-08-09 Goodrich Co B F Seine float and method of making same
GB1336826A (en) * 1971-05-12 1973-11-14 Stanley Works Hand tool handle and method for its manufacture

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1738804A3 (en) * 2005-06-29 2007-03-21 Andrea Burkhardt Device and method for the production of a wellness apparatus
EP3646927A1 (en) * 2018-11-02 2020-05-06 Victor Rackets Industrial Corporation Badminton racket
CN111202960A (en) * 2018-11-02 2020-05-29 胜利体育事业股份有限公司 Badminton racket
US10814187B2 (en) 2018-11-02 2020-10-27 Victor Rackets Industrial Corp. Badminton racket
CN111202960B (en) * 2018-11-02 2021-07-27 胜利体育事业股份有限公司 Badminton racket

Also Published As

Publication number Publication date
GB8415445D0 (en) 1984-07-25

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)