JP3113641U - Billiard cue vibration control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration damping structure for a billiard cue having a vibration damping action and maintaining a high structural level.
A body 110 has a free end 116 and a butt end 117, and a cover 120 houses the body 110. The body 110 has a concave layer 115 on the annular surface, thereby forming an annular space between the body 110 and the cover 120. The vibration absorbing material is disposed in the annular space. The vibration absorbing material reduces vibrations that occur when the free end 116 of the shaft strikes the ball. The vibration absorbing material is a sheet that covers the concave layer 115 of the body 110. The cover 120 is slid to the butt end 117 of the body 110 to fix the vibration absorbing material. Basically, the vibration absorbing material, the body 110 and the cover 120 are fixed together by an adhesive or a well-known technique.
[Selection] Figure 1

Description

  The present invention relates to a billiard cue, and more particularly to a billiard cue vibration damping structure.

  The cue used for billiards is for efficiently transmitting the momentum to the ball. Billiard cues are usually made of wood. The characteristics of the material affect the state of impact force transmitted to the player's hand. (The characteristics of the cue material affect the state of the impact force transmitted to the player's hand)

  When a player strikes a spinning ball (spin or english) using a special technique, the free end of the cue must strike a position that deviates from the center of mass of the ball. Then, the cue receives a force perpendicular to the axial direction. In particular, the cue shaft is thinner and more flexible than the butt and generates vibrations. This vibration affects the forward path of the ball. Therefore, the player must correct this phenomenon when shooting the spinning ball. For this reason, it is preferable to reduce the occurrence of vibration in the cue in order to cause the player to fire the desired spinning ball.

  However, when a player strikes the ball, he wants to transmit enough momentum from the cue to the ball, so a relatively hard cue is preferred. The player also wants the weight distribution of the cue and the state in which power is transmitted to the hand to be the same as a normal wooden one. Some cues are made of materials other than wood, but this type of cue lacks certain characteristics of wooden cues and can cause large vibrations in the cue, and when the ball is struck May change the course of travel. It is also possible to achieve a vibration damping effect by using a light, non-structural material (eg, cocoon) for the cue, but when the cue is lowered and the player hits the ball Affects the response.

  Accordingly, an object of the present invention is to provide a billiard cue vibration damping structure capable of maintaining a cue structure and exhibiting a vibration damping effect.

  In order to achieve the above object, the billiard cue vibration damping structure according to the claims of the present invention has a shaft having a high rigidity in the entire axial direction, the shaft is provided with a vibration absorbing material, and more than wood. High density. This vibration absorbing material can also be a piezoelectric material. At this time, it is not necessary to judge the density. The vibration absorbing material can reduce the vibration generated when the shaft hits the ball. For this reason, the vibration-absorbing material not only has a vibration damping effect, but can also relatively reduce the influence on the structure of the cue, and the influence on the property of momentum transmission by the cue is reduced.

  The shaft can be stored in other sections of the cue in a separable manner. The vibration-absorbing material can be used for a vibration-damping structure, and a composite material including a fiber or some kind of cellular structure can be adopted. The fiber stretching direction can be along a specific direction (for example, a long axis direction parallel to the shaft). The piezoelectric material can be used as a vibration absorbing material with or without a fiber array. The vibration-absorbing material can also be located at the thick end of the shaft (butt end) or at the middle stage of the shaft. Further, the vibration absorbing material can be disposed in the annular region or the central portion of the shaft.

  The vibration absorbing material described above can be used for a cue having a vibration damping effect. In addition, the vibration absorbing material is not always used in the shaft.

Embodiments of the present invention will be described below with reference to the drawings.
The billiard cue vibration damping structure according to the first embodiment of the present invention includes the following as shown in FIG.
The body 110 has a free end 116 and a butt end 117. The cover 120 stores the body 110. When the cover 120 covers the body 110, the composition has a smooth surface 240, as shown in FIG. The body 110 has a concave layer 115 on the annular surface, thereby forming an annular space between the body 110 and the cover 120. The vibration absorbing material 230 is disposed in the annular space. The vibration absorbing material 230 is capable of reducing vibrations that occur when the free end 116 of the shaft strikes the ball.

  The body 110 is wooden. Other materials in the body are also included in the claims of the present invention. Similarly, the cover 120 is made from a variety of materials, such as those impregnate with epoxy, phenolic, or other composite wood, And the outline is made fine so that its humidity or other conditions do not change.

  The vibration absorbing material 230 is a sheet that covers the concave layer 115 of the body 110. The cover 120 can slide to the butt end 117 of the body 110 to fix the vibration absorbing material 230. Basically, the vibration absorbing material 230, the body 110 and the cover 120 are fixed together by an adhesive or a well-known technique. FIG. 3 shows a second embodiment of the present invention. Of these, the cover 320 and the body 310 have the screw threads 330 separately, so that the body 310 can be screwed into the cover 320 on the body 310.

  The damping structure can be connected to the butt or other section of the cue in a separable manner by having a joint. For example, as shown in FIG. 3, the shaft can be coupled to the pin 355 of the cue bat 350 in a separable manner by having an insertion unit 360 embedded in the butt end 317. The entire shaft and bat are formed as a rigid body in the axial direction. And the axial direction 340 has very small flexibility. Also, when striking the ball, the damping structure is maintained so that the cue provides a sufficient momentum to transmit along the axial direction to the ball due to the rigidity in the axial direction. It is also possible to manufacture a cue that cannot be disassembled by fixing the vibration reducing shaft to the bat.

  Different materials, such as plastics or composite materials with different fillers, can be employed as the vibration absorbing material of the present invention. For example, it is possible to embed ceramics (eg, posted by US Pat. No. 5,827,797) in a matrix such as a polymer matrix to form a passive piezoelectric material as a vibration absorbing material. . In addition, vibration-absorbing materials composed of piezoelectric fibers (posted in US Pat. No. 5,869,189 and related applications) added to the matrix can advance vibration absorbing function in a specific direction in the material by collecting vibration energy. (Posted, for example, by US Pat. No. 6,620,287).

  The vibration absorption of the material has directionality by matching the extension direction of the fiber used for the vibration absorbing material (that is, the fiber is aimed at a specific direction). In the present invention, the thin thread of the vibration absorbing material in a part of the cue is parallel to the long axis direction 340 of the cue. For this reason, the extension direction of the fiber can increase the rigidity with respect to the diameter direction of the cue and reduce the vibration.

  Many types of composite materials having a porous structure (honeycomb structure) used for fibers or fillers are applied to vibration absorbing materials except for piezoelectric materials.

  Also, certain vibration absorbing materials, such as the piezoelectric materials described above, have better vibration absorbing properties than non-structural materials, such as foamed materials, materials that are less dense than cocoon or cue bodies (wood). Therefore, the vibration absorbing material not only reduces vibration without occupying a large volume, but also does not affect the characteristics of the player's desired momentum transmission.

  As shown in FIGS. 2 and 3, the vibration-absorbing material is positioned at the butt end of the shaft and is far away from the free end of the ball. For this reason, there is an advantage that the change in the curvature of the shaft is reduced when the position deviates from the center of gravity of the ball. For example, when a vibration-absorbing material having a density higher than that of wood (the aforementioned piezoelectric material) is disposed at a position close to the cue ferrule, the mechanical properties of the shaft adversely affect the player. This is because the mechanical properties of the shaft are different from those of a general wood shaft. In addition, when a vibration absorbing material is installed near the butt end of the shaft or in an intermediate portion of the shaft, a braking effect appears, but the curve characteristic of the shaft is not changed.

  As shown in FIGS. 1 to 3, the vibration-absorbing material has an annular shape and is embedded in the shaft of the cue, but the vibration-absorbing material is not necessarily annular. The vibration-absorbing material can provide a vibration control function when the ball is hit regardless of the shape. For example, the vibration absorbing material can be arranged from one or several corded sections along the axial direction of the cue shaft.

  The vibration-absorbing material described by each embodiment of the present invention applies to cues that are not removable or cues other than a cue composed of multiple steps. Further, it is possible to enhance the vibration damping effect by arranging the vibration absorbing material in the other part of the cue that is in contact with the shaft. For example, frequent vibrations can be prevented by disposing a central step portion of the vibration absorbing material on the handle of the cue.

  FIG. 4 is a cross-sectional view of a vibration damping structure according to a third embodiment of the present invention. The damping structure 400 includes a shaft 410 and a vibration absorbing material 430 that absorbs vibration when a ball is struck by the shaft. The vibration absorbing material 430 forms an annular area by covering the shaft. The cover 420 covers the vibration absorbing material 430 and the shaft 410. The damping structure further includes a universal shaft fitting having a universal adapter 440 and an insert unit 447. The universal adapter 440 has an extension 445 that couples with the bad end 415 of the shaft 410 by means of threads. The insertion unit 447 has a thread inside so that it can be coupled in a separable manner to the bolts at one step of the cue. The damping structure and its stepped portion are combined to form a rigid body that exhibits the axial direction.

  Since the foregoing is only a preferred embodiment of the present invention, it is intended that equivalent method changes based on the description of the present invention and the claims be included in the scope of the present invention.

It is sectional drawing at the time of decomposition | disassembly which shows the damping structure of the billiard cue by 1st Example of this invention. It is sectional drawing at the time of the assembly which shows the vibration suppression structure of the billiard cue by 1st Example of this invention. It is sectional drawing at the time of the assembly which shows the vibration suppression structure of the billiard cue by 2nd Example of this invention. It is sectional drawing at the time of the assembly which shows the damping structure of the cue of a billiard by the 3rd example of the present invention.

Explanation of symbols

  110 body, 115 concave layer, 116 free end, 117 butt end, 120 cover, 230 vibration absorbing material, 230 vibration absorbing material, 240 surface, 310 body, 317 butt end, 320 cover, 330 thread, 340 axial direction, 350 Butt, 355 pins, 360 insertion unit, 400 damping structure, 410 shaft, 415 butt end, 420 cover, 430 vibration absorbing material, 440 universal adapter, 445 extension, 447 insertion unit

Claims (23)

  Including a shaft with a free end, the shaft and billiard cue section parts are combined to form a whole that exhibits rigidity in the axial direction, and the shaft has a vibration-absorbing material that is denser than wood, and absorbs vibration Billiard cue damping structure characterized in that the material can reduce the vibration of the shaft when the ball hits the free end of the shaft.   2. The billiard cue vibration damping structure according to claim 1, wherein the shaft can be coupled to a billiard cue section in a separable manner.   2. The vibration damping structure for a billiard cue according to claim 1, wherein the vibration absorbing material is a composite material.   4. The billiard cue vibration damping structure according to claim 3, wherein the composite material includes fibers.   The billiard cue vibration damping structure according to claim 3, wherein the composite material has a porous structure.   The billiard cue vibration damping structure according to claim 3, wherein the composite material includes a piezoelectric material, the piezoelectric material includes fibers, and an extension direction of the fibers is along a longitudinal direction of the shaft.   2. The billiard cue vibration damping structure according to claim 1, wherein the vibration absorbing material forms an annular section of the shaft. 2. The billiard cue vibration damping structure according to claim 1, wherein the vibration absorbing material forms a central step portion of the shaft.   2. The billiard cue vibration damping structure according to claim 1, wherein the vibration absorbing material is positioned at a butt end of the shaft.   2. The vibration damping structure for a billiard cue according to claim 1, wherein the vibration absorbing material is positioned at an intermediate step portion of the shaft.   Including a shaft having a free end, and the section portion of the cue of the billiards is combined to exhibit rigidity in the axial direction, and the shaft has a piezoelectric material so that the ball is struck by the free end of the shaft. Billiard cue vibration damping structure characterized by reducing shaft vibrations when hit.   12. The vibration damping structure for a billiard cue according to claim 11, wherein the piezoelectric material has fibers, and the extension direction of the fibers is along a specific direction.   The billiard cue vibration damping structure according to claim 12, wherein the extending direction of the fibers of the piezoelectric material is along the longitudinal direction of the shaft.   Billiard cues that are rigid in the axial direction have a vibration-absorbing material that is more dense than wood, and the vibration-absorbing material can reduce shaft vibration when the ball is struck by the free end of the shaft. Billiard vibration reduction cue characterized by.   15. The billet vibration reducing cue according to claim 14, wherein the vibration absorbing material comprises a composite material.   The billet vibration reducing cue according to claim 15, wherein the composite material includes fibers.   The billet vibration reducing cue according to claim 15, wherein the composite material has a porous structure.   The billet vibration reducing cue according to claim 15, wherein the composite material includes a piezoelectric material, the piezoelectric material includes fibers, and the extension direction of the fibers is along the longitudinal direction of the shaft.   15. The billiard vibration reduction cue of claim 14, wherein the vibration absorbing material forms an annular section of the shaft.   15. The billiard vibration reduction cue according to claim 14, wherein the vibration absorbing material forms a central step portion of the shaft.   Billiard cues exhibiting rigidity in the axial direction have a piezoelectric material, and the piezoelectric material can reduce vibration of the shaft when the ball is struck by the free end of the shaft. queue.   The billet vibration reducing cue according to claim 21, wherein the piezoelectric material has fibers, and the extension direction of the fibers is along a specific direction. 23. The billet vibration reducing cue according to claim 22, wherein the extending direction of the fibers of the piezoelectric material is along the longitudinal direction of the shaft.

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