CN110870972B

CN110870972B - Billiard cue forelimb

Info

Publication number: CN110870972B
Application number: CN201811016551.1A
Authority: CN
Inventors: 张荣士
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2021-11-09
Anticipated expiration: 2038-08-31
Also published as: CN110870972A

Abstract

A cue stick forelimb comprises a tubular shell and a core. The housing has a first end, a second end, a predetermined wall thickness and a long axis extending from the first end to the second end. The shell comprises a main shell layer and a sub-shell layer overlapped with the main shell layer, wherein each shell layer is made of fiber reinforced plastic materials and is arranged along the circumferential direction of the shell. The main shell layer comprises a plurality of first fiber bundles, and the direction of each first fiber bundle is parallel to the long axis of the shell. The secondary shell layer also comprises a plurality of second fiber bundles, and the direction of each second fiber bundle is perpendicular to the long axis of the shell. The core is made of plastic foaming material and is arranged inside the shell. Therefore, the defects that the grain of the wood material has no unidirectionality and the density distribution is not uniform can be improved, the flow displacement of the fiber bundle of the main shell layer in the manufacturing process is avoided, the vibration during the batting can be absorbed, and the noise generated during the batting can be reduced.

Description

Billiard cue forelimb

Technical Field

The invention relates to a structure of a Billiard Cue (Billiard Cue), in particular to a Billiard Cue forelimb (Shaft) mainly made of fiber reinforced plastic composite materials.

Background

The billiard cue commonly used at present is usually composed of a front leg (Shaft) and a rear handle (Butt), but as is well known, most of the billiard cue front legs on the market are made of natural wood materials, and the wood cue front legs are easy to be affected with damp and bent, have no unidirectional lines, uneven density distribution, and have no adjustable hardness, so as to reduce the hitting precision and stability of users. Although fiber composite materials have been used to replace wood materials, such as those disclosed in U.S. Pat. No. 4,816,203 and U.S. Pat. No. 6,736,733, the disadvantages of wood material that the wood material is easy to be damped and bent, the grain of the wood material is not unidirectional, the density distribution is not uniform, and the hardness cannot be adjusted are not improved.

Disclosure of Invention

The present invention provides a billiard cue forelimb made of fiber reinforced plastic composite material, which can improve the defects of wood material such as non-unidirectional grain, non-uniform density distribution, and unadjustable hardness.

It is another object of the present invention to provide a cue stick forelimb made of a fiber reinforced plastic composite material that provides increased stability during impact.

It is yet another object of the present invention to provide a cue stick forelimb made of fiber reinforced plastic composite material that increases the accuracy of the shot.

Accordingly, to achieve the foregoing objects, the cue stick forelimb of the present invention comprises a tubular shell and a core. The housing has a first end, a second end, a predetermined wall thickness and a long axis extending from the first end to the second end. The shell further comprises a main shell layer and a sub-shell layer overlapped with the main shell layer, and the number of the layers of the main shell layer and the sub-shell layer can be different according to the requirements of the rigidity, the weight and the wall thickness of the forelimb. The main shell layer and the auxiliary shell layer are both made of fiber reinforced plastic materials and are arranged along the circumferential direction of the shell, the main shell layer comprises a plurality of first fiber bundles, and the direction of each first fiber bundle is parallel to the long axis of the shell. The secondary shell layer also comprises a plurality of second fiber bundles, and the direction of each second fiber bundle is perpendicular to the long axis of the shell. The core is made of plastic foaming material and is arranged inside the shell. Therefore, the billiard cue forelimb can improve the defects that the grain of the wood material has no unidirectionality and the density distribution is not uniform because the direction of each fiber bundle of the shell main shell layer is parallel to the long axis of the shell. Furthermore, because the direction of each dimensional bundle of the shell sub-shell is perpendicular to the long axis of the shell and is adjacent to the main shell, the flow displacement of the fiber bundle of the main shell in the manufacturing process can be avoided. In addition, the shell is filled with the core made of foaming materials, so that the shell can absorb the shock during the hitting and reduce the noise generated during the hitting.

Preferably, the shell of the cue stick forelimb of the present invention may comprise a hollow section extending a predetermined length from the first end of the tubular shell to the second end thereof. Therefore, the weight and hardness of the front-leg striking head can be properly reduced, and the striking accuracy can be improved.

Preferably, the shell of the front leg of the cue stick of the present invention may have a flat portion and a tapered portion, which may increase the stability of the ball when struck.

Preferably, the tubular shell of the cue stick forelimb of the present invention has a primary shell disposed outermost, that is, the outermost strands of the tubular shell run parallel to the long axis of the shell, thereby increasing the smoothness of the ball when struck by a user.

In addition, in a preferred embodiment of the cue stick front leg of the present invention, the tubular shell comprises a first primary shell layer, a second primary shell layer, a third primary shell layer, a fourth primary shell layer, and a first secondary shell layer, a second secondary shell layer, and a third secondary shell layer. The first primary shell is disposed on an innermost layer of the shell, the first secondary shell is disposed on an outer surface of the first primary shell, the second primary shell is disposed on an outer surface of the first secondary shell, the second secondary shell is disposed on an outer surface of the second primary shell, the third primary shell is disposed on an outer surface of the second secondary shell, the third secondary shell is disposed on an outer surface of the third primary shell, and the fourth primary shell is disposed on an outer surface of the third secondary shell.

Drawings

The invention will now be further described in a preferred embodiment with reference to the accompanying drawings in which:

FIG. 1 is a side view of a complete cue stick with the front leg of the cue stick being a preferred embodiment of the invention;

FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction 3-3 of FIG. 2;

FIG. 4 is a cross-sectional view taken along the direction 4-4 of FIG. 2;

FIG. 5 is a cross-sectional view taken along the direction 5-5 of FIG. 2; and

FIG. 6 is a perspective view, partially in section, of the front leg of the cue stick shown in FIG. 1.

Detailed Description

Referring first to fig. 1, a cue stick 10 is shown as a complete cue stick (BilliardCue), the cue stick 10 is composed of a front leg (craft) 12 and a rear handle (but) 14, the fastening method of the two is the prior art, in this embodiment, the front leg 12 is screwed with the rear handle 14 by a screw assembly 16, in addition, a ferrule 18 and a batting pad 20 are fixed on the top end of the front leg 12, and a cushion 22 is fixed on the end of the rear handle 14.

Referring to fig. 2-6, the forelimb 12 has a tubular shell 24 and a core 26. The tubular housing 24 has a first end 28, a second end 30, and a major axis X-X' extending from the first end 28 to the second end 30.

Generally, the tubular housing 24 has a length of about 730mm to 790mm, an outer diameter of about 9mm to 13mm at the first end 28, and an outer diameter of about 21mm to 22mm at the second end 30. In this embodiment, the tubular housing 22 has a length of 770mm, an outer diameter of 12.2mm at the first end 26, and 21.3mm at the second end 28.

As shown in FIG. 2, the front end of the front leg 12 has a hollow section 32 extending from the first end 28 of the tubular housing 24 to a line segment a-a. the hollow section 32 is used to reduce the stiffness and weight of the front end of the front leg 12, thereby creating a compensating curve in the front end of the front leg 12 during ball striking to reduce the deviation of the cue ball from the cue shaft center when the ball striking point is deviated from the cue ball center. The length of the hollow section 32 is typically between 10% and 30% of the length of the tubular housing 24, and in this embodiment the length of the hollow section 32 is about 160 mm.

Further, as shown in FIG. 2, the tubular housing 24 can be divided into a straight section 242 and a tapered section 244 by another line b-b. In other words, the straight section 242 extends from the first end 28 of the tubular housing 24 to the line b-b, and the straight section 242 has substantially the same outer diameter from the beginning to the end thereof. The tapered section 244 has an outer diameter extending from the line b-b to the second end 30 of the tubular housing 24, and the outer diameter of the tapered section 244 increases from the beginning to the end thereof. The straight section 242 allows the user to smoothly and stably play the golf club, i.e., increases the stability of the golf ball. Generally, the length of the straight section 242 may be between 40% and 55% of the length of the tubular housing 24. in the present embodiment, the straight section 242 has a length of about 394mm and an outer diameter of about 12.2 mm.

The tubular housing 24 of the present invention is formed by stacking a plurality of tubular shells of fiber reinforced plastic material, which may be carbon fiber material pre-impregnated with epoxy resin. Generally, the wall thickness of the tubular housing 24 is between about 0.85mm and 1.45mm, and in the present embodiment, the wall thickness of the tubular housing 24 is 0.9 mm. As shown in fig. 6, the tubular casing 24 is formed by combining four fiber-reinforced plastic first main shell layers 40, second main shell layers 42, third main shell layers 44, fourth main shell layers 46, and three fiber-reinforced plastic first sub-shell layers 50, second sub-shell layers 52, and third sub-shell layers 54, wherein the first main shell layer 40 is an innermost layer of the tubular casing 24, and the fourth main shell layer 46 is an outermost layer of the tubular casing 24. In more detail, the first sub-shell layer 50 is disposed on an outer surface of the first main shell layer 40, the second main shell layer 42 is disposed on an outer surface of the first sub-shell layer 50, the second sub-shell layer 52 is disposed on an outer surface of the second main shell layer 42, the third main shell layer 44 is disposed on an outer surface of the second sub-shell layer 52, the third sub-shell layer 54 is disposed on an outer surface of the third main shell layer 44, and the fourth main shell layer 46 is disposed on an outer surface of the third sub-shell layer 54. The first, second, third and fourth

main shell layers

40, 42, 44 and 46 each have a plurality of

first fiber bundles

402, 422, 442, 462 each having a single orientation, the orientation of the

first fiber bundles

402, 422, 442, 462 being parallel to the long axis X-X' of the tubular housing 24, thereby allowing unidirectional transmission of the force of hitting the ball. The first, second and third

secondary shell layers

50, 52, 54 each have a plurality of

second fiber bundles

502, 522, 542 having a single orientation, each of the

second fiber bundles

502, 522, 542 oriented perpendicularly to the longitudinal axis X-X' of the tubular housing 24. Thus, the first, second, and

third sub-shell layers

50, 52, and 54 serve to suppress the flow displacement of the fiber bundles in the first, second, third, and fourth

main shell layers

40, 42, 44, and 46 during the press-heating molding process.

In addition, the core 26 is filled in the shell 24 extending from the line a-a to the second end 30 of the shell 24. in the embodiment, the core 26 is made of PU foam, so that the impact shock during hitting the ball can be absorbed and the noise generated during hitting the ball can be reduced.

Claims

1. A cue stick forelimb comprising:

a tubular housing having a first end, a second end, a predetermined wall thickness and

a long shaft extending from the first end to the second end;

the tubular shell at least comprises a main shell layer and an auxiliary shell layer overlapped with the main shell layer, each shell layer is made of fiber reinforced plastic materials and is arranged along the circumferential direction of the shell, the main shell layer comprises a plurality of first fiber bundles, the direction of each first fiber bundle is parallel to the long axis of the shell, the auxiliary shell layer comprises a plurality of second fiber bundles, and the direction of each second fiber bundle is perpendicular to the long axis of the shell;

the tubular shell comprises a hollow section and a core body, wherein the hollow section extends for a first length from a first end of the tubular shell to a second end of the tubular shell, the core body is made of plastic foaming materials and is arranged in the tubular shell, and one end of the hollow section close to the second end of the tubular shell extends to the second end of the tubular shell.

2. The cue stick front leg of claim 1, wherein the first length of the hollow section is between 10% to 30% of the length of the tubular shell.

3. The cue stick forelimb of claim 1, wherein the tubular shell comprises a first primary shell layer, a second primary shell layer, a third primary shell layer and a fourth primary shell layer, a first secondary shell layer disposed at an innermost layer of the shell, the first secondary shell layer disposed at an outer surface of the first primary shell layer, the second primary shell layer disposed at an outer surface of the first secondary shell layer, the second secondary shell layer disposed at an outer surface of the second primary shell layer, the third primary shell layer disposed at an outer surface of the second secondary shell layer, the third secondary shell layer disposed at an outer surface of the third primary shell layer, the fourth primary shell layer disposed at an outer surface of the third secondary shell layer.

4. The cue stick forelimb of claim 1, wherein the tubular shell further comprises a flat section extending a second length from the first end to the second end thereof, and a tapered section extending from the end of the flat section to the second end of the tubular shell, the flat section having substantially the same outer diameter, the tapered section increasing in outer diameter from an initial end thereof to the second end of the tubular shell, the second length being greater than the first length.

5. The cue stick forelimb of claim 4, wherein the length of the straight section is between 40% to 55% of the length of the tubular housing.

6. The cue stick forelimb of claim 1, wherein the wall thickness of the tubular shell is between 0.85mm-1.45 mm.

7. The cue stick forelimb of claim 1, wherein the fiber reinforced plastic material is a carbon fiber reinforced epoxy material.

8. The cue stick forelimb of claim 1, wherein the outer diameter of the first end of the tubular housing is between 9mm to 13 mm.

9. The cue stick front leg of claim 8, wherein the outer diameter of the second end of the tubular housing is between 21mm to 22 mm.