Simple billiard cue front section capable of adjusting balance and billiard cue with simple billiard cue front section
By setting the mounting holes for the weight adjusting parts in the joint plug in the front section of the billiard club and guiding them in combination with the limit structure, the problem of uncontrollable position of the weight adjusting parts in the cavity is solved, simplifying production, improving stability and consistency is achieved, and multi-specimen adjustment is supported.
Patent Information
- Application Number
- CN202510826196.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-19
- Publication Date
- 2025-08-01
AI Technical Summary
The position of the weight adjustment parts in the front section of the existing billiard club is uncontrollable in the cavity, resulting in cumbersome production process and low packaging efficiency. The weight adjustment parts are prone to problems such as non-vertical axis and offset, affecting the consistency of the finished product and yield rate.
The mounting hole position of the weight adjuster is set in the inner plug of the joint to realize the rigid single-ended insertion position of the weight adjuster. Combined with the limit structure, the axis is aligned, and forced positioning is achieved through thread engagement to avoid the need for double-end glue filling.
It simplifies the production process, improves packaging efficiency, enhances structural stability and finished product consistency, and supports universal replacement and fine trench adjustment of multiple specifications.
Smart Images
Figure CN120393384A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of billiard cues, and specifically to a front section of a billiard cue with simple adjustable balance and a billiard cue thereof. Background Art
[0002] In order to achieve weight coordination and inertia matching between different rod bodies in the existing front section of a billiard cue, some products introduce a weight adjustment component design in the front section structure to adjust the overall weight ratio and the response characteristics of the rod body.
[0003] During the production process of the existing front section of a billiard cue with a weight adjustment component, a weight cavity is often reserved inside the tapered rod body. By dropping the weight adjustment component with a preset size from top to bottom, it is stuck at any section in the inner cavity due to gravity and tapered interference fit, and then foaming fillers are respectively poured from both ends for fixation to achieve the integrated design of the rod body weight structure;
[0004] However, this structure causes the following defects in the production process:
[0005] 1. Since the position of the weight adjustment component in the cavity is uncontrollable and there is no any limiting structure, in order to prevent it from loosening or shifting due to uneven flow of the colloid, it is necessary to pour the foaming fillers to cover it synchronously from the front and back ends. This two-way glue filling mode not only has a cumbersome process flow, low encapsulation efficiency, and long curing cycle, but also easily forms bubble inclusions or bonding blind spots at the intersection of the glue layers, affecting the long-term stability;
[0006] 2. The weight adjustment component directly gets stuck on the inner wall of the cone after sliding by gravity, lacking any axial alignment or rotational limiting structure. It is very easy to have the axis of the weight adjustment component not perpendicular to the axis of the rod body, resulting in left-right deviation or tilting. Especially when the foaming filler has not completely cured and is slightly vibrated, it may cause eccentric distribution, which not only leads to the imbalance of the inertial response of the rod body and the drift of the impact point feedback, but also seriously affects the consistency of the finished product and reduces the yield rate;
[0007] 3. Since this weight adjustment structure depends on the matching relationship between the weight adjustment component and the specific taper of the inner cavity of the rod body, the weight adjustment component cannot be installed in a universal manner with standard parts. It is necessary to customize the diameter and length for different front section models, resulting in a coarse granularity of the weight adjustment module, a discontinuous adjustment range, and an inability to achieve fine grading control. Summary of the Invention
[0008] The purpose of this application is to provide a technical solution to solve the problems raised in the above background art.
[0009] To achieve the above purpose, this application provides the following technical solutions:
[0010] A simple and adjustable balance cue tip, comprising a cue body, a joint inner plug, a ferrule, and a tip. The tip is connected to the ferrule and disposed at one end of the cue body. The two ends of the joint inner plug respectively include a butt mounting hole position and a weight adjustment member mounting hole position. A cue body balance weight adjustment member is connected to the weight adjustment member mounting hole position. The joint inner plug is disposed at the other end of the cue body. At the same time, one section of the cue body balance weight adjustment member is placed in the weight adjustment member mounting hole position, and the other section is placed in the inner cavity of the cue body.
[0011] Preferably, the joint inner plug is any one of a wooden inner plug, an electrical wooden inner plug, a plastic rod inner plug, a POM rod inner plug, a PA rod inner plug, and an alloy rod inner plug.
[0012] Preferably, the joint inner plug is an electrical wooden inner plug.
[0013] Preferably, the electrical wooden inner plug is any one of a cotton base phenolic electrical wooden inner plug, a paper base phenolic electrical wooden inner plug, a glass fiber cloth base epoxy electrical wooden inner plug, an aramid cloth base phenolic electrical wooden inner plug, and an epoxy glass fiber electrical wooden inner plug.
[0014] Preferably, one section of the cue body balance weight adjustment member is screwed and placed in the weight adjustment member mounting hole position.
[0015] Preferably, the other section of the cue body balance weight adjustment member placed in the inner cavity of the cue body is any one of a block shape, a column shape, and a spherical shape.
[0016] Preferably, the cue body balance weight adjustment member is made of a metal material.
[0017] Preferably, the cue body is made of any one of carbon fiber and glass fiber.
[0018] Preferably, the inner cavity of the cue body is also filled with a foamed filler.
[0019] A billiard cue, comprising a butt, and the butt is connected to the cue body through the joint inner plug.
[0020] In summary, the technical effects and advantages of the present invention are as follows:
[0021] 1. In this solution, by setting a weight adjustment member mounting hole position in the joint inner plug, the rigid single-end insertion positioning of the weight adjustment member is realized, avoiding the need for double-end glue filling caused by the floating of the traditional weight adjustment member in the cavity, thereby simplifying the process flow, improving the packaging efficiency, reducing the curing cycle, and avoiding the problems of air bubbles or blind spots in the intersection area, and enhancing the long-term structural stability.
[0022] 2. When the rod body balance weight adjustment part of this solution is inserted into the inner plug and the hole position, it is guided by the limiting structure, which can ensure that its axis is coaxially aligned with the rod body, avoiding tilting, skewing or rotational misalignment. At the same time, it still has a stable insertion posture in the uncured state, preventing shaft deviation due to vibration, and ensuring the consistency of impact feedback and the yield rate of finished products.
[0023] 3. The universal interface between the weight adjustment part and the inner plug of this solution realizes plug-in installation, without relying on taper fit, without customization, supports universal replacement of multiple specifications, and can achieve fine grading, modular adjustment and universal adaptation. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0025] Figure 1 It is a three-dimensional view of the present invention.
[0026] Figure 2 It is a front cross-sectional view of the present invention.
[0027] Figure 3 It is an enlarged three-dimensional view of Embodiment 1 of the rod body balance weight adjustment part of the present invention.
[0028] Figure 4 It is an explosion schematic diagram of the first perspective of the present invention.
[0029] Figure 5 It is an explosion schematic diagram of the second perspective of the present invention.
[0030] Figure 6 It is an explosion schematic diagram of the third perspective of the present invention.
[0031] Figure 7 It is an enlarged front cross-sectional assembly schematic diagram of Embodiment 1 of the rod body balance weight adjustment part of the present invention.
[0032] Figure 8 It is an enlarged three-dimensional assembly schematic diagram of Embodiment 2 of the rod body balance weight adjustment part of the present invention.
[0033] Figure 9 It is an enlarged three-dimensional assembly schematic diagram of Embodiment 3 of the rod body balance weight adjustment part of the present invention.
[0034] Figure 10 It is a three-dimensional view of the present invention with a rear handle.
[0035] Reference numerals in the figure: rod body 1, inner plug of joint 2, rear handle mounting hole 21, weight adjustment part mounting hole position 22, tip 3, leather tip 4, rod body balance weight adjustment part 5, foamed filler 6, rear handle 01. Specific embodiments
[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0037] Please refer to Figures 1 - 10 A front section of a billiard cue with simple adjustable balance includes a rod body 1, an inner plug of joint 2, a tip 3, and a leather tip 4. The leather tip 4 is connected to the tip 3 and is arranged at one end of the rod body 1. Both ends of the inner plug of joint 2 respectively include a rear handle mounting hole 21 and a weight adjustment part mounting hole position 22. The weight adjustment part mounting hole position 22 is connected with a rod body balance weight adjustment part 5. The inner plug of joint 2 is arranged at the other end of the rod body 1. At the same time, one section of the rod body balance weight adjustment part 5 is placed in the weight adjustment part mounting hole position 22, and the other section is placed in the inner cavity of the rod body 1.
[0038] In this solution, by setting the weight adjustment part mounting hole position 22 in the inner plug of joint 2, the rigid single-end insertion positioning of the weight adjustment part 5 is realized, avoiding the need for double-end glue filling caused by the floating of the traditional weight adjustment part in the cavity, thereby simplifying the process flow, improving the packaging efficiency, reducing the curing cycle, and avoiding the problems of air bubbles or blind spots in the intersection area, and enhancing the long-term structural stability.
[0039] When the rod body balance weight adjustment part 5 is inserted into the inner plug 2 and the hole position 22, it is guided by the limiting structure, which can ensure that its axis is coaxially aligned with the rod body 1, avoiding inclination, skew or rotational misalignment. At the same time, it still has a stable insertion posture in the uncured state, preventing axial deviation due to vibration, and ensuring the consistency of impact feedback and the yield of finished products.
[0040] In this solution, the weight adjustment part 5 is inserted and installed in cooperation with the universal interface 22 of the inner plug 2, without relying on taper fit, without customization, supporting universal replacement of multiple specifications, and enabling fine grading, modular adjustment and universal adaptation.
[0041] Preferably, the inner plug of joint 2 is any one of a wooden inner plug, an electric wooden inner plug, a plastic rod inner plug, a POM rod inner plug, a PA rod inner plug, and an alloy rod inner plug.
[0042] In this solution, the inner plug 2 of the joint can be a wooden rod inner plug made of natural wood. Its advantage lies in having good processing flexibility and structural affinity. Especially when combined with the traditional wooden rod body 1, it can form a more natural transition interface. Since wood has a natural longitudinal fiber arrangement structure, its elastic response and force transmission coordination in the axial direction of the rod body are better. It can assist the rod body to form a certain vibration buffering effect during hitting, improving the overall feel. At the same time, wood is relatively light in weight and can be used to control the forward movement range of the mass of the front section.
[0043] In this solution, the inner plug 2 of the joint can be made of phenolic thermosetting electric wooden rods (such as phenolic cloth-based or fiberglass-based composites). This can significantly improve its installation strength, positioning accuracy, and thermal stability for the rod body balance weight adjustment part 5. Phenolic electric wooden rods have excellent dimensional stability and high hardness characteristics. They can maintain long-term structural rigidity at the weight adjustment part installation hole position 22, and are not prone to thermal expansion and contraction or environmental creep. They are especially suitable for carrying the weight adjustment structure with plug-and-play characteristics in this solution. In addition, the inner plug of the electric wooden rod has good thread retention ability. It can still maintain the thread bite force after dozens of loading and unloading cycles, ensuring that the rod body balance weight adjustment part 5 will not be displaced due to impact or vibration during installation.
[0044] In this solution, the inner plug 2 of the joint can be made of plastic rods (such as common plastics like ABS and PVC). Its advantage is low processing cost and convenient molding, suitable for the needs of low-cost mass production.
[0045] In this solution, the inner plug 2 of the joint can be made of POM (polyoxymethylene). Combining with the plug-and-play adjustable characteristics of the weight adjustment part 5 in this solution, it can demonstrate excellent mechanical properties and dimensional stability. POM materials have high crystallinity, with a compact structure, low friction coefficient, and excellent wear resistance. They are widely used in high-precision mechanical guide rails and thread structures. In this solution, the POM rod can be processed by CNC turning to produce precise weight adjustment part installation hole positions 22 with extremely small dimensional errors. This can ensure the coaxiality and attitude stability during the plugging and unplugging of the weight adjustment part. At the same time, it has good self-lubricating characteristics, which can reduce the assembly resistance of the weight adjustment part and extend its service life. In addition, POM has a low creep rate and strong anti-aging ability, and can still maintain good structural integrity under scenarios of impact or high-frequency plugging and unplugging.
[0046] In this solution, the inner plug 2 of the joint can be made of PA (nylon). Its advantages are reflected in having good toughness and impact resistance, suitable for absorbing impact loads and avoiding rigid fracture. In this solution, the rod body balance weight adjustment part 5 needs to be inserted into the weight adjustment part installation hole position 22 for positioning and fixing. If a PA rod inner plug is used, its elastic recovery performance can, to a certain extent, improve the anti-loosening ability of the thread, helping to enhance the retention effect of the weight adjustment part under dynamic impact.
[0047] In this solution, the inner plug 2 of the joint can be made of metal (such as 6061 aluminum alloy, brass, 17-4 stainless steel), which can maximize the structural strength, rigidity and thermal stability, ensuring the attitude maintainability of the rod body balance weight adjustment part 5 in the weight adjustment part installation hole 22 and zero-tolerance wear during multiple plugging and unplugging processes. The metal rod inner plug can be processed by CNC precision turning to produce a multi-section hole structure coaxial with the rod body, including a threaded section and a limiting step, which helps to achieve the rapid insertion, precise limitation and high-strength fixation of the weight adjustment part. Especially in high-end competitive cue sticks, using a metal inner plug can not only enhance the overall torsional rigidity of the rod body connection, but also realize the integrated design of the threaded connection transition structure with the butt. In addition, the metal material has high thermal conductivity and the smallest dimensional change under the influence of environmental temperature and humidity changes, which ensures the precise response and long-term reliability of the front section weight system.
[0048] Preferably, the inner plug 2 of the joint is a bakelite inner plug.
[0049] In this solution, the inner plug 2 of the joint is a bakelite inner plug, that is, a thermosetting bakelite material made of phenolic resin as the matrix and compounded with reinforcing materials (such as paper base, cloth base, fiberglass cloth base) through high-pressure hot pressing. Its application in this solution has multiple advantages in terms of structure, processing and performance, and can effectively improve the positioning accuracy, attitude stability and repeated plugging and unplugging ability of the rod body balance weight adjustment part 5 in the weight adjustment part installation hole 22, which is specifically reflected as follows: First, from the material composition, the bakelite rod has a highly cross-linked phenolic resin network structure. This three-dimensional molecular structure enables it to maintain excellent dimensional stability under the action of heat, humidity and load, which is particularly suitable for the structural requirements in this solution that the weight adjustment part needs to form a tight fit with the inner plug of the joint and be repeatedly plugged and unplugged without loosening. Second, the bakelite rod has a high surface hardness and strong compressive strength. After the weight adjustment part installation hole 22 is formed by turning, a threaded structure with clear boundaries, complete tooth profiles and precise radial interference can be obtained, which is beneficial for the axial limitation and self-aligning rotation of the weight adjustment part 5 during its insertion process, effectively avoiding the common "left skew and right tilt" or "eccentric locking" phenomena of traditional gravity-sliding weight adjustment structures, and thus maintaining the inertial axis stability and hitting consistency of the rod body 1 during use. Third, the bakelite material has a medium density (generally 1.3–1.5 g / cm 3 ) and a good balance between rigidity and toughness, so that while ensuring the structural strength, it will not cause too much interference to the overall quality of the front section, which helps to maintain the center of gravity setting logic of the rod body weight system in this solution and is compatible with different specifications of weight adjustment parts 5 to achieve continuously adjustable weight adjustment. In addition, the bakelite inner plug is not easy to absorb moisture and does not expand, and can maintain the inner hole size and thread integrity for a long time in the use environment with climate changes between north and south or alternating hot and humid conditions, so that the weight adjustment part can still be smoothly plugged and unplugged without loosening signs after long-term use, greatly enhancing the stability, durability and maintainability of the structure of this solution.
[0050] Preferably, the bakelite stick inner plug is any one of a cotton cloth-based phenolic bakelite stick inner plug, a paper-based phenolic bakelite stick inner plug, a glass fiber cloth-based epoxy bakelite stick inner plug, an aramid cloth-based phenolic bakelite stick inner plug, and an epoxy glass fiber bakelite stick inner plug.
[0051] When the joint plug 2 in this solution is made of cotton cloth-based phenolic bakelite rod, its core advantage lies in the material structure having a certain rigidity and flexible buffering properties, which is suitable for the composite installation environment of mechanical limitation and vibration suppression of the rod body balancing weight adjustment part 5. This type of bakelite rod is made of phenolic resin and high-density cotton cloth layer by layer by hot pressing to form a layered mesh structure reinforced with an interlaced fabric. The material body exhibits a medium elastic modulus and good impact absorption performance, so that it can have both structural strength and local toughness after the weight adjustment part installation hole 22 is processed. This feature can provide a slight elastic recovery during the multiple insertion and removal of the weight adjustment part, enhance the self-locking force and anti-loosening performance of the thread, and is especially suitable for competitive use scenarios with frequent micro-vibrations at the moment of hitting the ball; in addition, the cotton cloth-based structure has good micro-vibration absorption properties due to its fiber base, which can partially alleviate the impact rebound caused by the rigid fit of the weight adjustment part, maintain the stability of the inertia axis of the rod body 1, and help improve the overall feel and impact feedback consistency.
[0052] When the joint inner plug 2 in this solution is manufactured from a paper-based phenolic bakelite rod, its main advantages lie in its low material density, light weight, and superior processing performance, making it particularly suitable for billiard cue structures with sensitive front-section mass. This material is formed by hot-pressing a layer of paper-based fiber impregnated with phenolic resin. Its internal structure is uniform and dense, making it easy to process high-precision threads and positioning holes. In this solution, the mounting hole 21 and the weight adjustment member mounting hole 22 can be machined on the surface of the inner plug through precision turning, forming a stable engagement area for the rod body balance weight adjustment member 5 to be inserted and positioned. Due to the moderate friction coefficient and soft surface of the paper-based phenolic material, the weight adjustment member experiences moderate frictional resistance during assembly, achieving stable positioning without causing jamming.
[0053] In this solution, a fiberglass cloth-based epoxy electrical wooden rod is used as the joint inner plug 2, which can maximize the dimensional accuracy, structural rigidity, and long-term stability of the installation hole 22 of the weight adjustment part. This material is formed by hot pressing and curing after the glass fiber cloth is vacuum impregnated with epoxy resin. It has very high transverse shear strength, impact resistance, and extremely low thermal expansion rate, and is suitable for the repeated plugging and unplugging and high locking force installation occasions of the rod body balance weight adjustment part 5. In the structure of this solution, since the weight adjustment part needs to maintain strict attitude verticality and axis consistency, the coaxiality of its insertion hole and the structural anti-deformation ability are crucial. The fiberglass cloth-based epoxy electrical wooden rod has an isotropic reinforced layer arrangement, so that it can obtain extremely high hole roundness and wall thickness consistency when turning the weight adjustment hole, ensuring that the weight adjustment part is not eccentric or tilted after insertion. At the same time, its high fiberglass content gives the material excellent crack resistance and high-frequency fatigue life. Even if the weight adjustment part is quickly plugged and unplugged many times in the competitive state, there will be no material fatigue, hole wall damage, or structural loosening problems. In addition, this material has a medium-high density (about 1.8–2.0 g / cm 3 ), which can effectively provide the mass inertia support of the front section and has a better effect on stabilizing the balance of the rod body.
[0054] In this solution, if the joint inner plug 2 is made of aramid (such as Kevlar) cloth-based phenolic composite electrical wooden rod, it can provide extremely high strength-to-weight ratio, high-frequency impact buffering performance, and excellent dimensional stability performance for the weight adjustment structure. Aramid fiber has extremely strong tensile strength, excellent heat resistance, and extremely low creep rate. The laminated reinforced structure formed after being compounded with phenolic resin not only has high modulus, but also can effectively disperse the stress concentration generated during the plugging and unplugging process at the micro scale, significantly improving the fatigue strength of the installation hole 22 of the weight adjustment part. During the plugging and unplugging process of the rod body balance weight adjustment part 5 in this solution, the multi-directional tensile performance of aramid fiber can inhibit the propagation of microcracks caused by stress fluctuations at the hole edge, making the plugging and unplugging process stable and not galling. In addition, the density of the aramid-based material is slightly lower than that of the fiberglass-based material (about 1.4–1.6 g / cm 3 ), which reduces the interference to the mass distribution of the front section while providing rigid support, and helps to concentrate the weight adjustment design towards the rear end to achieve a more flexible center of gravity adjustment effect.
[0055] If the inner plug 2 in this solution uses a general-purpose epoxy fiberglass electrical wooden rod (such as G10, FR4), it can provide the highest level of dimensional stability, electrical insulation, and structural consistency. Such materials are formed by high-pressure thermosetting of high-content glass fiber alkali-free cloth and epoxy resin, with almost no microscopic voids inside, having extremely high strength uniformity and zero moisture absorption performance. It is the best material to maintain a constant shape under the insertion and extraction of the rod body balance weight adjustment part 5 in this solution. During the processing of the weight adjustment part installation hole 22, G10 / FR4 materials can support the formation of high-precision thread structures with an accuracy of 0.01 mm, having good tapping holding force and axial tensile load-bearing capacity, ensuring no tooth shape damage or loosening of the fit during the insertion and extraction cycle. At the same time, its high density (up to 1.9–2.0 g / cm 3 ) can provide additional weight stability in the structure, making the overall inertia characteristics of the front section more uniform. G10 material has extremely strong heat resistance and heat distortion suppression ability, ensuring that the weight adjustment part will not loosen or shift in attitude due to environmental changes during long-term use or transportation.
[0056] Preferably, one section of the rod body balance weight adjustment part 5 is screwed into the weight adjustment part installation hole 22.
[0057] This solution constructs an axial locking interface based on the principle of thread meshing, and through precise fitting, it realizes the forced positioning and alignment of the rod body balance weight adjustment part 5 in the inner plug 2 of the joint, ensuring that its axis is consistent with the rod body 1, eliminating the form errors of inclined assembly or eccentric rotation, thereby improving the inertial symmetry and mechanical response stability of the whole rod during the impact process; the threaded connection has reversibility and micro-displacement adjustment ability, and the user can change its depth in the rod body cavity by rotating the weight adjustment part, finely adjusting the center of gravity position and the weight inertia to meet the needs of personalized hitting styles; at the same time, this threaded structure can provide anti-vibration and anti-loosening ability without adhesive encapsulation, enabling the weight adjustment part to maintain its structural position unchanged after multiple insertions and extractions or transportation impacts, effectively improving the reusability, reliability, and assembly efficiency of the weight adjustment component in this solution.
[0058] Preferably, the other section of the rod body balance weight adjustment part 5 placed in the inner cavity of the rod body 1 is any one of a block shape, a column shape, and a spherical shape.
[0059] When the inserted section of the rod body balance weight adjustment part 5 in this solution is a block structure, its main feature is that one or more axial dimensions are much smaller than the inner diameter of the cavity, presenting an irregular or approximately flat body shape. This structure can adjust its attitude direction and contact surface position in the inner cavity of the rod body 1 through free space, making its inertial mass concentrate in a specific area close to or deviating from the axis of the rod body, having a large degree of freedom in inertial angle control.
[0060] When the insertion section of the rod body balance weight adjustment member 5 is a columnar structure, it presents an axisymmetric entity with a diameter slightly smaller than the inner diameter of the rod body 1. Its length can be extended in different segments according to needs. It has the significant advantages of uniform inertial distribution, linear counterweight response, and high attitude stability. In the structure of this solution, the insertion end of the columnar weight adjustment member is fixed by screwing with the weight adjustment member mounting hole 22, and the insertion section penetrates into the rod body 1 to form a cantilever-like or embedded counterweight body, making the center of gravity of the counterweight coincide strictly with the axis of the rod body. This can not only effectively avoid the problem of uneven torsional vibration of the rod body caused by the center of gravity offset, but also achieve linear stepped adjustment under different diameter / length combinations, constructing a predictable weight-to-feel response curve. In addition, the columnar geometry has excellent attitude self-stability under rotational symmetry, and it is not easy to be displaced due to inertial side deviation even when the rod body rotates and impacts.
[0061] When the insertion section of the rod body balance weight adjustment member 5 is a spherical structure, its three-dimensional length in all directions, mass center concentration, and maximum radius of inertia endow it with extremely strong impact stability and direction-independent inertial response characteristics. In this solution, the spherical weight adjustment member is limited to the weight adjustment member mounting hole 22 through a screwing structure. Once the other spherical end enters the inner cavity of the rod body 1, a spherically symmetric counterweight center is formed in the cavity, which has the characteristic of dynamic inertial self-averaging. That is, during the multi-angle rotation and hitting process, its inertial axis response does not change with the rotation direction of the cue, thus providing a highly consistent hitting feedback. Although the spherical structure has relatively low adjustability in the control of axial inertia distribution, due to its concentrated volume and uniform force, it is not easy to generate local stress concentration or vibration response skew.
[0062] Preferably, the rod body balance weight adjustment member 5 is made of metal.
[0063] Metal materials have much higher density and rigidity than plastic and composite non-metal materials, and can achieve greater weight output under limited volume conditions. Furthermore, through the rod body balance weight adjustment member 5, precise and effective mass distribution adjustment can be achieved in the limited inner cavity space of the rod body 1, which is especially suitable for the weight adjustment requirements of professional or high-level cues that are highly sensitive to hitting inertia and the stability of the inertial principal axis. In the structure of this solution, one end of the rod body balance weight adjustment member 5 is embedded in the weight adjustment member mounting hole 22 of the joint inner plug 2 through a threaded connection method, and the other end penetrates into the inner cavity of the rod body 1 to form a counterweight rod arm. In this structure, the metal material not only undertakes the function of the weight body, but also enhances the anti-deformation ability of the overall weight adjustment member through its high stiffness characteristics, and can effectively resist axial bending or radial offset during impact, drop, or transportation vibration.
[0064] Preferably, the rod body 1 is made of any one of carbon fiber and glass fiber.
[0065] When the rod body 1 is made of carbon fiber composite material, due to its extremely high strength-to-weight ratio, extremely high axial elastic modulus, and excellent low-density characteristics (about 1.6 g / cm 3 ), the front section structure can achieve extremely small mass while maintaining high stiffness, significantly improving the response speed and energy transfer efficiency of the rod body; at the same time, the force transmission efficiency of the carbon fiber material along the axial direction can ensure that the rod body balance weight adjustment part 5 can immediately affect the overall center of gravity of the whole rod rather than the local mass after changing its penetration depth, thus strengthening the sensitivity and accuracy of the weight adjustment system. In addition, the carbon fiber rod body has an extremely low thermal expansion rate and does not deform due to temperature and humidity changes.
[0066] When the rod body 1 is made of glass fiber composite material, it has higher toughness and flexible deformation ability while ensuring moderate rigidity. The material density is about 1.8 - 2.0 g / cm 3 between, slightly higher than that of carbon fiber, and can be used as an alternative option with higher requirements for impact buffering and cost control in mid- to low-end structures; the good impact absorption performance of the glass fiber material helps to disperse local stress when the rod body balance weight adjustment part 5 impacts the inner wall of the rod body or during intense hitting, extending the fatigue life of the entire weight system; at the same time, due to the low interlaminar shear modulus of the glass fiber, after the position of the small-range weight adjustment part changes, the feel change curve of the rod body is more linear and gentle, suitable for users who require fine feel adjustment.
[0067] Preferably, the inner cavity of the rod body 1 is also filled with a foamed filler 6. Further, the foamed filler 6 is any one of the following materials: polyurethane foam sponge (PU Foam), polyethylene closed-cell foam (Closed-Cell PE Foam), epoxy foaming adhesive, EVA hot-pressed foam (EVA Foam), foamed silicone rubber. Polyurethane foam sponge is suitable for filling structures that require casting molding, have complex shapes, and close fits, and has excellent coating and noise reduction properties. Polyethylene closed-cell foam is suitable for structural buffering, lightweight stuffing, and moisture-proof sealing occasions, and has good compression resistance and insulation properties. Epoxy foaming adhesive is suitable for structural sealing weight systems, has high strength and high dimensional stability but is not removable.
[0068] EVA hot-pressed foam is suitable for the suspension buffer limit area in adjustable structures and has excellent dynamic rebound characteristics and durability. Foamed silicone rubber is suitable for flexible limit structures in high-temperature or high-humidity environments and has excellent heat resistance and weather resistance.
[0069] A billiard cue includes a butt 01, and the butt 01 is connected to the rod body 1 through the joint inner plug 2 to form a complete billiard cue.
[0070] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A front section of a billiard cue with simple adjustable balance, comprising a rod body, an inner plug of the joint, a ferrule, and a tip. The tip is connected to the ferrule and arranged at one end of the rod body, and is characterized in that: The two ends of the joint inner plug respectively include a rear handle mounting hole and a weight adjustment piece mounting hole. The weight adjustment piece mounting hole is connected to a rod body balancing weight adjustment piece. The joint inner plug is arranged at the other end of the rod body. At the same time, one section of the rod body balancing weight adjustment piece is placed in the weight adjustment piece mounting hole, and the other section is placed in the inner cavity of the rod body.
2. The front section of the billiard cue with simple adjustable balance according to claim 1, characterized in that: The joint inner plug is any one of a wooden stick inner plug, a bakelite stick inner plug, a plastic stick inner plug, a POM stick inner plug, a PA stick inner plug, and an alloy stick inner plug.
3. The front section of the billiard cue with simple adjustable balance according to claim 2, characterized in that: The joint inner plug is a bakelite stick inner plug.
4. The front section of the billiard cue with simple adjustable balance according to claim 3, characterized in that: The bakelite stick inner plug is any one of a cotton cloth-based phenolic bakelite stick inner plug, a paper-based phenolic bakelite stick inner plug, a glass fiber cloth-based epoxy bakelite stick inner plug, an aramid cloth-based phenolic bakelite stick inner plug, and an epoxy glass fiber bakelite stick inner plug.
5. The front section of the billiard cue with simple adjustable balance according to claim 1, characterized in that: A section of the rod balancing weight-adjusting piece is screwed and placed in the mounting hole of the weight-adjusting piece.
6. The front section of the billiard cue with simple adjustable balance according to claim 5, characterized in that: The other section of the rod body balancing weight disposed in the inner cavity of the rod body is in any one of block, column and spherical shapes.
7. The front section of the billiard cue with simple adjustable balance according to claim 6, characterized in that: The rod body balancing weight is made of metal.
8. The front section of the billiard cue with simple adjustable balance according to claim 1, characterized in that: The rod body is made of any one of carbon fiber and glass fiber.
9. The front section of the billiard cue with simple adjustable balance according to claim 1, characterized in that: The inner cavity of the rod is also filled with foam filler.
10. A billiard cue, comprising the billiard cue tip with simple adjustable balance according to any one of claims 1-9, characterized in that: It comprises a rear handle, which is connected to the rod body through the joint inner plug.