Rear handle structure of billiard cue

Abstract

The utility model discloses a rear barre structure of a billiard cue, which comprises an inner core rod and pasters, the inner core rod is of a triangular pyramid structure, the cross section of the triangular pyramid structure is a regular triangle, and three groups of pasters are circumferentially pasted on the side surface of the inner core rod, so that the inner core rod and the three pasters form a rear barre body. The rear barre body is of a big-end-back circular truncated cone structure, the front end face of the inner core rod is provided with a connecting structure used for being connected with a front limb rod of the billiard cue, the density of the inner core rod is larger than 1 g / cm < 3 >, the density of the patch is smaller than 0.9 g / cm < 3 >, and the inner core rod and the patch are fixedly bonded through glue to form the rear barre body. The integral density of the rear handle rod is adjusted by utilizing different densities of the inner core rod and the patches, so that effective weight balancing is realized, and the forming mode not only reduces the processing difficulty and improves the yield, but also effectively improves the bending resistance of the rear handle rod.

Description

Technical Field

[0001] This utility model relates to the technical field of billiard cues, and in particular to a back stem structure for a billiard cue. Background Technology

[0002] A billiard cue is a tool used in billiards. It is thinner at the front and thicker at the back, with a length between 1.3m and 1.5m. The overall weight of a billiard cue is generally between 16 ounces and 21 ounces. A billiard cue mainly consists of a tip, a ferrule, and a shaft. The shaft includes a forelimb and a butt limb that can be detached and connected as one piece.

[0003] To ensure the feel and stability of the billiard cue, the weight of the butt cue is generally between 14.5 ounces and 15.5 ounces. To address the weight distribution issue, existing butt cue technologies consist of a butt cue body and an inner core. The thinner end of the butt cue has a cavity within which the inner core is fixedly bonded. The butt cue body has a higher density, typically 1.1 g / cm³, for example, using rosewood or ebony, while the inner core has a lower density, typically between 0.4 g / cm³ and 0.9 g / cm³. The connection between the butt cue and the foreleg cue is generally achieved through a threaded rod on the end face of the inner core connecting to a threaded hole on the rear end face of the foreleg cue, or through a threaded connection to a center wheel on the end face of the inner core, which in turn connects to the foreleg cue. To prevent rotation of the inner core relative to the butt cue, the cross-section of the inner core is generally square or hexagonal. Therefore, the existing back cue stick has the following problems: 1. Because the shape of the cavity on the back cue stick matches the inner core, and it is difficult to process a polygonal cavity, the scrap rate is high. At the same time, the price of wood for high-quality cues is relatively expensive, so the overall processing cost is high; 2. When the cue stick is hit, the pressure reaction force of the back cue stick is generally applied to the inner core. However, the current inner core has a low density and weak bending resistance, so its service life is short. Summary of the Invention

[0004] The purpose of this invention is to provide a back stem structure for a billiard cue that not only reduces the processing difficulty and increases the yield rate, but also effectively improves the bending resistance of the back stem.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a billiard cue back stem structure, including an inner core and patches. The inner core is a triangular frustum structure with an equilateral triangle cross-section. Three sets of patches are provided and circumferentially attached to the side of the inner core, so that the inner core and the three patches form the back stem body. The back stem body is a frustum structure with a smaller front and a larger rear. The front end face of the inner core is provided with a connecting structure for connecting the front leg of the billiard cue. The density of the inner core is greater than 1 g / cm3, and the density of the patches is less than 0.9 g / cm3.

[0006] Furthermore, a sleeve is fitted around the outer periphery of the rear handlebar body, and the sleeve is fixedly fitted around the outer periphery of the rear handlebar body.

[0007] Furthermore, the handle is made of metal, acrylic, or plastic.

[0008] Furthermore, the density of the inner core rod is between 1.05 g / cm3 and 1.15 g / cm3.

[0009] Furthermore, the density of the patch is between 0.4 g / cm3 and 0.85 g / cm3.

[0010] Furthermore, the connecting structure is a connecting post, with a first thread at the front end and a second thread at the rear end. The first and second threads have opposite directions of rotation. The front end of the inner core rod has a threaded hole that is threadedly connected to the second thread, so that the connecting post is threadedly connected to the front end of the inner core rod.

[0011] Furthermore, the connecting structure is a middle wheel, the front end of the middle wheel has a first threaded post, the rear end of the middle wheel has a second threaded post, the first threaded post and the second threaded post have opposite thread directions, and the front end of the inner core rod has a threaded hole that is threadedly connected to the second threaded hole, so that the middle wheel is threadedly connected to the front end face of the inner core rod.

[0012] Furthermore, the inner core rod is composed of multiple inner core units assembled together.

[0013] In summary, this utility model has the following beneficial effects:

[0014] The rear handlebar structure of this utility model consists of an inner core rod and a patch that are fixedly bonded together with adhesive to form the handlebar body. The overall density of the handlebar is adjusted by utilizing the different densities of the inner core rod and the patch, thereby achieving effective weight distribution. This molding method not only reduces the processing difficulty and increases the yield rate, but also effectively improves the bending resistance of the handlebar. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure 3 This is a cross-sectional view of the rear handlebar body of this utility model.

[0018] Figure 4 This is a cross-sectional view of the handlebar sleeve of this utility model when it is installed on the rear handlebar body.

[0019] Figure 5 This is a schematic diagram of the structure of this utility model when the connecting structure is a connecting column.

[0020] Figure 6 This is a schematic diagram of the connection structure of this utility model when it is a middle wheel.

[0021] Figure 7 This is a structural diagram of the inner core rod of this utility model when it is composed of inner core units.

[0022] Figure 8 This is a schematic diagram of the structure of the sleeve when the thickness of the sleeve of this utility model is increased.

[0023] In the diagram: 10, inner core rod; 20, patch; 30, rear handlebar body; 40, connecting structure; 50, grip sleeve. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figures 1-8 As shown, a billiard cue handle structure includes an inner core 10 and a patch 20, which constitute the basic structure of this utility model. The inner core 10 is a triangular frustum structure with an equilateral triangle cross-section. Three sets of patches 20 are provided and circumferentially attached to the side of the inner core 10, so that the inner core 10 and the three patches 20 form the handle body 30. Specifically, the cross-section of the patch 20 is arc-shaped, and the shape of the planar part of the patch 20 is adapted to the side of the inner core 10. The cross-section of the inner core 10 gradually increases from the front end to the rear end. Similarly, the cross-section of the patch 20 also gradually increases from the front end to the rear end. The handle body 30 is a frustum-shaped structure with a small front cross-section and a large rear cross-section. In order to improve the smoothness of the outer circumferential surface of the handle body 30, the handle body 30 is machined into a frustum-shaped structure with a smaller front and a larger rear.

[0026] The inner core rod 10 has a connecting structure 40 for connecting the forelimb rod of the billiard cue on its front end face. The density of the inner core rod 10 is greater than 1 g / cm3, and the density of the patch 20 is less than 0.9 g / cm3. In this invention, the density of the inner core rod 10 is greater than the density of the outer patch 20. The reverse force on the billiard cue will be transmitted to the inner core rod 10 through the forelimb rod. Due to the high density of the inner core rod 10, it has a strong bending resistance, thereby effectively improving the overall bending resistance of the butt stick.

[0027] In some embodiments, a sleeve 50 is fitted around the outer periphery of the rear handlebar body 30. The sleeve 50 is fixedly fitted around the outer periphery of the rear handlebar body 30 by adhesive bonding. On the one hand, it can play a protective role, reduce wear on the rear handlebar body 30, and also play a moisture-proof role. On the other hand, it can also play a decorative role.

[0028] In some embodiments, the handle 50 is made of metal, acrylic, or plastic. The purpose of using such materials is that they are easy to process. Since the handle 50 is exposed to the outside, consumers can directly observe it. If the bottom is made of wood, the quality of the billiard cue will be lower. If high-end wood is used, the processing difficulty is high, the scrap rate is high, and the processing cost is high. Therefore, metal, acrylic, or plastic are selected.

[0029] like Figure 8 As shown, the handlebar 50 can be set to a certain thickness so that the surface of the handlebar 50 can be engraved, inlaid and polished, so that the required pattern and / or text can be set on the surface of the handlebar 50. In order to ensure that the overall outer diameter of the rear handlebar remains unchanged, the outer diameter of the rear handlebar body 30 needs to be reduced.

[0030] In some embodiments, the density of the inner core rod 10 is between 1.05 g / cm³ and 1.15 g / cm³, preferably 1.1 g / cm³. Further, the density of the patch 20 is between 0.4 g / cm³ and 0.85 g / cm³, using the different densities of the inner core rod 10 and the patch 20 to adjust the overall weight of the handlebar.

[0031] In some embodiments, the connecting structure 40 is a connecting post, the front end of the connecting post is provided with a first thread, the rear end of the connecting post is provided with a second thread, the first thread and the second thread have opposite directions of rotation, and the front end of the inner core rod 10 is provided with a threaded hole that is threadedly connected to the second thread, so that the connecting post is threadedly connected to the front end of the inner core rod 10.

[0032] In some embodiments, the connecting structure 40 is a middle wheel, the front end of which has a first threaded post and the rear end of which has a second threaded post. The threads of the first and second threaded posts are opposite in direction. The front end of the inner core rod 10 is provided with a threaded hole that is threadedly connected to the second threaded hole, so that the middle wheel is threadedly connected to the front end face of the inner core rod 10. In order to improve the connection stability, glue can be evenly applied to both ends of the middle wheel, so that the connection between the middle wheel and the front limb rod and the rear handlebar rod is more secure.

[0033] In some embodiments, the inner core bar is assembled from multiple inner core units. The purpose of this arrangement is that the inner core bar is assembled from multiple inner core units with smaller cross-sections. Compared with a one-piece inner core bar, this structure can effectively increase the bending resistance and overall strength of the rear handlebar.

[0034] In summary, this utility model has the following beneficial effects:

[0035] The rear handlebar structure of this utility model consists of an inner core rod 10 and a patch 20 bonded together with adhesive to form the rear handlebar body 30. The overall density of the rear handlebar is adjusted by utilizing the different densities of the inner core rod 10 and the patch 20, thereby achieving effective weight distribution. This molding method not only reduces the processing difficulty and increases the yield rate, but also effectively improves the bending resistance of the rear handlebar.

[0036] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A back stem structure for a billiard cue, characterized in that: The device includes an inner core rod (10) and a patch (20). The inner core rod (10) is a triangular frustum structure with an equilateral triangle cross-section. The patch (20) is provided in three sets and is circumferentially attached to the side of the inner core rod (10), so that the inner core rod (10) and the three patches (20) form the rear handle body (30). The rear handle body (30) is a frustum structure with a smaller front and a larger rear. The front end face of the inner core rod (10) is provided with a connecting structure (40) for connecting the front leg of the billiard cue. The density of the inner core rod (10) is greater than 1 g / cm3, and the density of the patch (20) is less than 0.9 g / cm3.

2. The back stem structure of a billiard cue according to claim 1, characterized in that: The outer periphery of the rear handlebar body (30) is fitted with a sleeve (50), which is fixedly fitted onto the outer periphery of the rear handlebar body (30).

3. The back stem structure of a billiard cue according to claim 2, characterized in that: The handle (50) is made of metal, acrylic or plastic.

4. The back stem structure of a billiard cue according to claim 1, characterized in that: The density of the inner core rod (10) is between 1.05 g / cm3 and 1.15 g / cm3.

5. The back stem structure of a billiard cue according to claim 1, characterized in that: The density of the patch (20) is between 0.4 g / cm3 and 0.85 g / cm3.

6. The back stem structure of a billiard cue according to claim 1, characterized in that: The connecting structure (40) is a connecting post. The front end of the connecting post is provided with a first thread, and the rear end of the connecting post is provided with a second thread. The first thread and the second thread have opposite directions of rotation. The front end of the inner core rod (10) is provided with a threaded hole that is threadedly connected to the second thread, so that the connecting post is threadedly connected to the front end of the inner core rod (10).

7. The back stem structure of a billiard cue according to claim 1, characterized in that: The connecting structure (40) is a middle wheel. The front end of the middle wheel has a first threaded post, and the rear end of the middle wheel has a second threaded post. The threads of the first threaded post and the second threaded post have opposite directions. The front end of the inner core rod (10) is provided with a threaded hole that is threadedly connected to the second threaded hole, so that the middle wheel is threadedly connected to the front end face of the inner core rod (10).

8. The back stem structure of a billiard cue according to claim 1, characterized in that: The inner core rod (10) is composed of multiple inner core units assembled together.

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