CN212700482U

CN212700482U - Billiard cue forelimb capable of reducing deflection of hitting ball

Info

Publication number: CN212700482U
Application number: CN202021602397.9U
Authority: CN
Inventors: 张荣士
Original assignee: Shi Rong Enterprise Co ltd
Current assignee: Shi Rong Enterprise Co ltd
Priority date: 2020-07-03
Filing date: 2020-08-05
Publication date: 2021-03-16
Anticipated expiration: 2030-08-05
Also published as: CN113877187A; US20220001265A1

Abstract

The utility model discloses a can reduce billiard ball pole forelimb of batting partial curvature contains a forelimb body, and this forelimb body has a straight section and a section of pulling out, and this straight section has the same first external diameter, and the external diameter of this section of pulling out is from the terminal bottom of this forelimb body of this straight section crescent. The forelimb body comprises a wooden rod body and a Fiber Reinforced Plastic (FRP) outer layer with a predetermined thickness. The wooden rod body comprises a shaft hole, and the shaft hole is provided with a preset depth and a preset inner diameter. Therefore, the billiard cue forelimb not only can reduce the deflection rate when hitting balls, but also can solve the problems that the wooden material is damped, bent and deformed and is sunk by collision.

Description

Billiard cue forelimb capable of reducing deflection of hitting ball

Technical Field

The utility model relates to a billiard cue field especially relates to a can reduce billiard cue forelimb of batting partial curvature.

Background

The billiard cue generally used at present is generally formed by assembling a forelimb (Shaft) and a rear handle (Butt), and as is well known, the forelimb made of natural wood material is popular with most of the players due to moderate weight and elasticity, but the forelimb of the wood billiard cue is easy to be damped, bent and deformed, the surface is easy to be sunken when being collided, the hardness cannot be adjusted and the like, so that the hitting accuracy is reduced.

To improve the above-mentioned deficiency of the conventional wood cue front leg, the U.S. patent No. 5,725,4375 discloses an improved wood cue front leg having a ferrule (ferule) with better compressibility than the cue front leg disposed at the front end of the cue front leg, and a recessed hole disposed at the front end of the cue front leg, so that on one hand, a part of the impact force during the impact can be absorbed by the ferrule, and on the other hand, the weight of the cue front leg front end can be reduced by the recessed hole, and thus the improved cue front leg can hit the ball with better accuracy than the conventional wood cue front leg. The wooden cue stick forelimb disclosed in this patent is not practical in nature because the more compressible ferrule is not easily controlled in manufacture. Furthermore, the diameter of the concave hole is large and the depth is large to achieve the purpose of reducing the weight of the front end of the front leg of the billiard cue, and the patent does not suggest or suggest any teaching. Moreover, the improved wood cue front leg cannot solve the problems of bending deformation when being affected with damp and sinking when being affected with collision.

In addition, U.S. patent No. 6,110,051 discloses another improved cue stick front leg made of fiber reinforced plastic (a composite material of fibers in a binder), which is technically characterized in that the front end of the leg is provided with a concave hole, so that the cue stick front leg has sufficient rigidity on one hand, and the weight of the cue stick front leg front end can be substantially reduced on the other hand. Thus, the cue stick forelimb disclosed in U.S. patent 6,110,051 not only increases the accuracy of the shot, but also ameliorates the lack of the cue stick forelimb disclosed in U.S. patent 5,725,4375. Nonetheless, the cue stick forelimb disclosed in U.S. patent 6,110,051 is not ideal for practical use because the cue stick forelimb made of fiber reinforced plastic is not as effective in absorbing impact forces at impact as a cue stick forelimb made of natural wood material. Therefore, the billiard cue forelimb has the advantages of a wood material, cannot bend and deform when being wetted, cannot sag when being collided, and can reduce the deflection curvature of the hitting ball is to be researched.

SUMMERY OF THE UTILITY MODEL

Accordingly, the primary objective of the present invention is to provide a cue stick front leg which not only has the advantages of wood material, but also solves the problems of bending due to moisture and sinking due to collision.

Another object of the present invention is to provide a billiard cue forelimb, wherein the forelimb has a proper elasticity, so that when the hitting point deviates from the center of the cue ball, the proper elasticity can compensate the deviation rate of the actual traveling path of the cue ball and the expected hitting path, and the deviation curvature of the cue ball during hitting can be reduced.

It is still another object of the present invention to provide a cue stick forelimb which has a body with a suitable elasticity and a suitable weight.

It is yet another object of the present invention to provide a cue stick forelimb that allows the user to smoothly and stably move the stick body on the bridge when hitting a ball.

Therefore, to achieve the above objects, the front leg of the billiard cue of the present invention includes a front leg body having a top end, a bottom end, a long axis and a first length extending from the top end to the bottom end along the long axis. The forelimb body comprises a straight section and a pushing section, wherein the straight section extends from the top end of the forelimb body to the bottom end along the long axis by a second length and has the same first outer diameter. The pushing section extends from the end of the flat section to the bottom end of the forelimb body, and the outer diameter of the pushing section is gradually increased from the end of the flat section along the bottom end of the forelimb body. The forelimb body also comprises a wooden rod body and a Fiber Reinforced Plastic (FRP) outer layer with a preset thickness, and the surface of the wooden rod body is coated with the FRP outer layer. The wooden rod body comprises a shaft hole, and the shaft hole is provided with a preset depth and a preset inner diameter. The predetermined depth of the axial hole extends along the top end of the front limb body along the long axis to the bottom end and is between 15% and 55% of the first length. The predetermined inner diameter of the shaft hole is between 51% and 81% of the first outer diameter. Therefore, when the front leg of the billiard cue is used for hitting the ball, the user can improve the accuracy of hitting the ball by means of the stable operation rod body of the straight section on the hand bridge. The utility model discloses a billiard cue forelimb has this axle hole that has predetermined internal diameter and degree of depth in addition to this straight section, and this structure can be with the weight moderate reduction of this billiard cue forelimb front end portion on the one hand, and it is here said to be with the weight moderate reduction, and the meaning lies in can not infer with this that the internal diameter of this axle hole or degree of depth are bigger the better, because if the weight reduces too much, this forelimb can not produce suitable impact force. On the other hand, the shaft hole with the predetermined inner diameter and depth can make the cue stick forelimb have proper elasticity so as to generate proper bending when the cue stick forelimb impacts the cue ball at the top end, and through the bending phenomenon, when the ball hitting point deviates from the center of the cue ball, the situation that the cue ball deviates from the expected travelling route can be improved to a certain extent, namely, the deviated curvature of the cue stick when hitting the ball can be reduced. The shaft hole of a predetermined depth of inner diameter as described herein provides the cue stick forelimb with appropriate resilience, and it is also not possible to infer therefrom that a larger inner diameter or depth of the shaft hole is better, since if too much resilience would be counter productive. Furthermore, it should be noted that, since the surface of the wooden rod body of the front leg of the billiard cue of the present invention is wrapped with a layer of Fiber Reinforced Plastic (FRP) having a suitable thickness, on one hand, the advantage of the wooden material can be maintained, and on the other hand, the problem of bending deformation and sinking when the wooden material is affected with damp and collision can be solved.

The utility model provides a preferred embodiment of the billiard cue forelimb is that the Fiber Reinforced Plastic (FRP) outer layer contains the glass fiber of preimpregnation epoxy resin.

One of the features of the utility model is that the thickness of the Fiber Reinforced Plastic (FRP) outer layer is between 3.6% and 5.8% of the first outer diameter.

The utility model provides a billiard cue forelimb still another characteristic is the external diameter of this straight section, and this first external diameter is between 10.5mm to 13.5 mm.

Another feature of the cue stick forelimb provided by the present invention is that it weighs between 96 grams and 120 grams.

The utility model provides a billiard cue forelimb's another characteristic is the length of this forelimb body, this first length promptly is between 711mm to 813 mm.

The utility model provides a billiard cue forelimb is still another characterized in that the length of the straight section of the forelimb body, namely the second length is between 31% and 54% of the first length.

Yet another feature of the cue stick forelimb provided by the present invention is that the predetermined inner diameter of the shaft hole is between 5.36mm and 10.94 mm.

The utility model provides a billiard cue forelimb's still another characteristic is that the predetermined degree of depth in this shaft hole can be equal to or less than the length of this forelimb body straight section, this second length promptly.

Drawings

FIG. 1 schematically illustrates a side view of a complete cue stick of an embodiment of the present invention, the front leg of the cue stick being a preferred embodiment of the present invention;

FIG. 2 schematically illustrates a cross-sectional view of a front leg body of a cue stick front leg of an embodiment of the present invention, taken along the direction 2-2 of FIG. 1;

FIG. 3 schematically illustrates a cross-sectional view of an embodiment of the invention taken along the direction 3-3 of FIG. 2;

FIG. 4 schematically illustrates a cross-sectional view of an embodiment of the invention taken along the direction 4-4 of FIG. 2;

FIG. 5 schematically illustrates a method for measuring the amount of elastic deformation of the embodiment of the present invention shown in FIG. 1 when a force is applied thereto;

FIG. 6 is a vector exploded view schematically illustrating how the actual path of the cue ball will deviate from the intended path by an angle θ and the force applied when the ball is struck by the front leg of a prior art cue stick with the point of impact right of the cue ball center; and

fig. 7 is a vector exploded view schematically illustrating how a cue ball travels and is stressed when hitting a ball with a ball hitting point to the right of the center of the cue ball, according to an embodiment of the present invention, at a minimum angle away from the intended line of the cue ball.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

Referring first to fig. 1 to 4, wherein the number 100 is a complete cue, the cue 100 is composed of a front leg 10 and a rear handle 12, the fastening method of the two is the prior art, in this embodiment, the front leg 10 is screwed with the rear handle 12 through a screw assembly 13, in addition, a ferrule 14 and a batting pad 15 are fixed on the top end of the front leg 10, and a cushion 16 is fixed on the end of the rear handle 12.

The forelimb 10 includes a forelimb body 20, the forelimb body 20 having a top end 22, a bottom end 24, a longitudinal axis X-X', and a first length L extending from the top end 22 to the bottom end 24 along the longitudinal axis₁. The first length L₁Typically between about 711mm and 813mm and preferably the first length is about 737 mm.

According to the present invention, the forelimb body 20 further has a straight section 26 and a tapered section 28, the straight section 26 extends from the top end 22 of the forelimb body 20 to the bottom end 24 along the long axis X-X 'to a line segment a-a'. The straight section 26 allows the user to smoothly and stably run the club body on the bridge for increasing the accuracy of hitting the ball. Generally, the straight section 26 has a first outer diameter D₁And a second length L₂. A first outer diameter D of the straight section 26₁May be between 10.5mm and 13.5mm, and in the present embodiment, the first outer diameter D₁About 12.75 mm. The second length L₂May be generally between the first length L₁Between 31% and 54%, in the present embodimentThe second length L₂About 394 mm. The tapered section 28 has an outer diameter that increases from its initial end (i.e., the line a-a') along the bottom end 24 of the forelimb body 20.

The forelimb body 20 comprises a wooden rod 30 and a Fiber Reinforced Plastic (FRP) outer layer 40 with a predetermined thickness covering the surface of the wooden rod 30. The wooden pole 30 is typically made of maple or ash. The wooden stick body 30 has a shaft hole 32, and the shaft hole 32 has a predetermined inner diameter D₂Extend from the top end 22 to the bottom end 24 along the long axis X-X' by a predetermined depth H₁. The depth and inner diameter of the axial hole 32 must be properly matched to provide proper elasticity to the front section of the front limb body 20 and to properly reduce the weight of the front limb body 20. Generally, the depth H of the axial bore 32₁Is between the first length L₁Between 15% and 55%, in the present embodiment, the depth H of the axial hole 32₁Approximately 370 mm. In addition, the depth H of the axial hole 32 is set here₁Can be designed to be less than the length L of the straight section 26 of the forelimb body 20₂To give the front end portion of the cue stick tip 10 a suitable resilience, since if too much resilience is available it may have an adverse effect. The inner diameter D of the shaft hole 32₂Is matched with the first outer diameter D of the straight section 26₁The inner diameter D of the axial bore 32 is designed to be generally the same as the inner diameter D of the axial bore₂About the first outer diameter D of the straight section 26₁If the outer diameter D of the straight section 26 is between 51% and 81%₁Between 10.5mm and 13.5mm, the inner diameter D of the shaft hole 32₂Between about 5.36mm and 10.94 mm. In the present embodiment, the inner diameter D of the axial hole 32₂About 8.50 mm.

In addition, the Fiber Reinforced Plastic (FRP) outer layer 40 has a predetermined thickness T₁The surface of the wood rod 30 is completely covered with the Fiber Reinforced Plastic (FRP) outer layer 40, which is made of carbon fiber or glass fiber composite material pre-impregnated with epoxy resin, to prevent the wood rod 30 from bending and deforming when being wetted and from sinking when being collided. In addition, glass pre-impregnated with epoxy is generally selected so as not to affect the elasticity of the forelimb 20Glass fiber composite material. Of course, to achieve the above-mentioned purpose, the thickness T of the Fiber Reinforced Plastic (FRP) outer layer 40₁Must also be properly controlled and is generally sized to conform to the first outer diameter D of the straight section 26₁And designing. Generally, the thickness T of the Fiber Reinforced Plastic (FRP) outer layer 40₁Between about 3.6% and 5.8% of the outer diameter of the straight section 26 when the outer diameter D of the straight section 26 is larger than₁The thickness T of the Fiber Reinforced Plastic (FRP) outer layer is between 10.5mm and 13.5mm₁Between about 0.38mm and 0.78 mm. In this embodiment, the thickness T of the Fiber Reinforced Plastic (FRP) outer layer 40₁About 0.74 mm. Generally, the cue stick front leg 10 weighs between about 96 grams and about 120 grams, and in this embodiment, the cue stick front leg 10 weighs about 106 grams.

Finally, referring to fig. 5 to 7, fig. 5 schematically illustrates a method for measuring the front leg elasticity of a cue according to an embodiment of the present invention. During measurement, a cue stick front limb 10 to be measured is firstly fixed on a supporting device S, then two supporting points S1 and S2 with the span of 500mm and a pressing point P located at the center of the two supporting points are selected from the front end 22 of the cue stick front limb 10, then a pressing device M is used for pressing the cue stick front limb 10 at the pressing point P with the advancing speed of 10mm/min and the pressure of 22lb, so as to obtain the deformation of the cue stick front limb 10. The prior art solid wood cue 80 measured this way to a deflection of 0.313 inches. The club forelimb 10 of the utility model has a length of 394mm in the straight section 26, a depth of the shaft hole 32 of 280mm and an inner diameter of 8.5mm, and a deflection of 0.338 inch. The club forelimb 10 of the utility model has a length of 394mm at the straight section 26, a depth of the shaft hole 30 of 370mm, and a deflection of 0.361 inch when the inner diameter is 8.5 mm. The amount of deformation will make the cue stick forelimb 10 have appropriate elasticity, so as to reduce the deflection rate when hitting the ball, and the effect of the present invention will be described below with reference to fig. 6 and 7.

FIG. 6 schematically illustrates a prior art solid wood cue stick 80 for striking a cue ball 90, wherein the ball striking point 82 is offset to the right of the center 92 of the cue ball 90 by a predetermined distance d according to general mechanicsIn other words, the club 80 generates an impact force F at the impact point 82₀Is formed by a vertical component F₀₁And a horizontal component F₀₂The resultant horizontal component force F is due to the poor resilience of the prior art wood cue 80₀₂An influence on the traveling path of the cue ball 90, i.e., the actual traveling path P of the cue ball 90₁Will deviate from the predetermined course P₀Theta₀And (4) an angle.

FIG. 7 schematically illustrates a cue stick front 10 according to an embodiment of the present invention for impacting a cue ball 90. similarly, the ball striking point 82 is offset a predetermined distance d to the right of the center 92 of the cue ball 90, so that the cue stick front 10 also generates an impact force F at the ball striking point 82₀. Because of the appropriate resilience of the front portion of the cue stick forelimb 10, the front end, particularly the straight section 26, will experience an appropriate curvature upon impact, which curvature has been found to impart an impact force F on the cue ball 90 in the other direction as shown_rAnd the impact force F_rIs formed by a vertical component F_r1And a horizontal component F_r2Synthesized so that the horizontal component force F_r2Just can counteract the impact force F₀Horizontal component force F₀₂And thus the actual travel path P of the cue ball 90₂Deviation from a predetermined path of travel P₀Angle of theta₁Will be less than theta₀。

The above-mentioned specific embodiments of the front leg of the billiard cue capable of reducing the deflection curvature of the hitting ball are further detailed, and it should be understood that the above-mentioned only specific embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cue stick forelimb comprising:

a forelimb body having a top end, a bottom end, a long axis and a first length extending from the top end to the bottom end along the long axis;

the forelimb body comprises a straight section and a pushing section; the straight section extends from the top end of the forelimb body to the bottom end along the long axis for a second length and has the same first outer diameter; the pushing and pulling section extends from the tail end of the flat section to the bottom end of the forelimb body, and the outer diameter of the pushing and pulling section is gradually increased from the tail end of the flat section along the bottom end of the forelimb body;

the forelimb body also comprises a wooden rod body and a Fiber Reinforced Plastic (FRP) outer layer with a preset thickness, and the surface of the wooden rod body is coated with the FRP outer layer;

the wooden rod body comprises a shaft hole, and the shaft hole extends to a preset depth along the long axis to the bottom end of the front limb body in a mode of having a preset inner diameter;

the predetermined depth of the axial hole is between 15% and 55% along the first length; and

the predetermined inner diameter of the shaft hole is between 51% and 81% of the first outer diameter.

2. A cue stick forelimb according to claim 1 wherein the outer Fiber Reinforced Plastic (FRP) layer comprises fiberglass pre-impregnated with epoxy.

3. A cue stick front leg according to claim 1, wherein the predetermined depth of the shaft hole is equal to or less than the second length.

4. A cue stick front leg according to claim 1, wherein the second length is between 31% and 54% of the first length.

5. A cue stick front leg according to claim 4, wherein the first length is between 711mm to 813 mm.

6. A cue stick forelimb according to claim 5 wherein the first length is 737 mm.

7. A cue stick front leg according to claim 6 wherein the second length is 394 mm.

8. A cue stick front leg according to claim 7, wherein the predetermined depth of the shaft hole is 370 mm.

9. A cue stick front leg according to claim 5, wherein the first outer diameter is between 10.5mm and 13.5 mm.

10. A cue stick front leg according to claim 9, wherein the predetermined inner diameter of the shaft hole is between 5.36mm and 10.94 mm.

11. A cue stick front leg according to claim 9, wherein the first outer diameter is 12.75 mm.

12. A cue stick front leg according to claim 9, wherein the predetermined internal diameter of the shaft hole is 8.50 mm.

13. A cue stick forelimb according to claim 9 wherein the outer layer of Fiber Reinforced Plastic (FRP) has a thickness of between 3.6% and 5.8% of the first outer diameter.

14. A cue stick forelimb according to claim 13 wherein the outer layer of Fibre Reinforced Plastic (FRP) is 0.74mm thick.

15. A cue stick front leg according to claim 5, wherein the cue stick front leg weighs between 96 grams and 120 grams.

16. A cue stick front leg as in claim 15 wherein the cue stick front leg weighs 106 grams.