TWI900433B - Double-layer sleeve bat structure - Google Patents

Abstract

The double-layered sleeve-type baseball bat structure of the present invention comprises: an outer tube having a striking section and a tapered section with a gradually decreasing outer diameter; an inner tube integrally formed of carbon fiber material, with a grip section at one end, a connecting section with a gradually increasing outer diameter at one end of the grip section, and a through-hole section with a uniform outer diameter at one end of the connecting section. The through-hole section is provided with an annular boss having an outer diameter larger than that of the inner tube through-hole section; and an elastic material disposed on the upper portion of the inner tube, on one side of the annular boss.

Description

Double-layer sleeve bat structure

The present invention relates to a baseball bat, and in particular to a double-layer sleeve-type baseball bat structure that can reduce the sound volume.

To improve hitting performance, various different baseball bat designs are available on the market. These bats each provide different functional requirements. For example, US7014580, US8632428, and US10220277 disclose different structural designs and improve different functions.

The main purpose of this invention is to provide a double-layer sleeve-type baseball bat structure that can improve the control of the ball and reduce noise.

To achieve the aforementioned primary objectives, the double-layered sleeve-type baseball bat structure of the present invention comprises: an outer tube having a uniform outer diameter striking section, an end cap disposed at one end of the striking section, and a tapered section with a tapered outer diameter disposed at the other end; an inner tube integrally formed from a carbon fiber material, a grip section disposed at one end of the inner tube, a connecting section with a tapered outer diameter disposed at one end of the grip section, a through-hole section with a uniform outer diameter disposed at one end of the connecting section, an annular boss disposed on the through-hole section, the outer diameter of the boss being larger than that of the inner tube through-hole section; and an elastic material disposed on the inner tube, located on one side of the annular boss.

The above-mentioned structure of the present invention utilizes the softer nature of the outer tube to enhance ball control during impact, while also utilizing the bosses on the inner tube to increase impact force. Furthermore, the elastic material absorbs the sound generated by impact, thereby achieving the goals of enhancing ball control and reducing noise.

10: External tube

11: Attack Section

12: End cap

13: Conical segment

20: Inner tube

21: Grip Section

22: Connecting Section

23: Wearing Section

24: Annular boss

30: Elastic material

Figure 1 is a schematic three-dimensional diagram of the present invention.

Figure 2 is a partial three-dimensional schematic diagram of the inner tube of the present invention.

Figure 3 is a cross-sectional view taken along line 3-3 in Figure 1.

Figure 4 is a partial enlarged schematic diagram of Figure 3.

Figure 5 is similar to Figure 4 and is a schematic diagram of another elastic material setting state.

The applicant first clarifies that in this specification, including the embodiments described below and the claims of the patent application, directional terms are based on the directions in the drawings. Furthermore, in the embodiments and drawings described below, identical component numbers represent identical or similar components or structural features. Directions in this specification are based on the directions in the drawings for ease of description and are not intended to be limiting.

Please refer to Figures 1 to 5 , which illustrate the double-layered, sleeve-type baseball bat structure of the present invention. The structure includes an outer tube 10 made of carbon fiber. The outer tube 10 has a striking section 11 with a uniform outer diameter. An end cap 12 is provided at one end of the striking section 11, and a tapered section 13 with a tapered outer diameter is provided at the other end of the striking section 11.

An inner tube 20 is integrally formed from a carbon fiber material. A grip section 21 is provided at one end of the inner tube 20. A connecting section 22 with a gradually expanding outer diameter is provided at one end of the grip section 21. A penetration section 23 with a uniform outer diameter is provided at one end of the connecting section 22. An annular boss 24 is provided on the penetration section 23, and the outer diameter of the annular boss 24 is larger than the outer diameter of the inner tube penetration section 23. The inner tube 20 is sheathed within the outer tube 10 with its penetration section 23 and connected to the outer tube's tapered section 13 at its connecting section 22. The annular boss 24 is positioned within the striking section 11 of the outer tube, preferably in the middle section of the striking section 11, commonly known as the "sweet spot." A gap is left between the penetration section 23 and the outer tube 10, ensuring they are separated and not in contact.

An elastic member 30 is disposed on the inner tube 20, located on one side of the annular boss 24. The elastic member 30 can be a sound-absorbing and elastic foam material such as foam, plastic, or rubber. The elastic member 30 can be annular, arc-shaped, or block-shaped. It can be located on the side of the annular boss 24 closest to the handle section 21 or on the side of the annular boss 24 farther from the handle section 21.

With the structure of the present invention, the outer tube 10 is less rigid than the inner tube 20 and the annular boss 24. This makes the outer tube 10 more flexible and able to deform during impact, significantly improving ball control and shock absorption. Furthermore, the annular boss 24 effectively limits the extent of rebound, ensuring that the ball's speed does not exceed the upper limit set by the Baseball Association. The gap between the inner tube 20 and the outer tube 10, as well as the provision of the elastic material 30, effectively reduce the sound of impact.

In the present invention, the elastic member 30 can also be provided as two, placed simultaneously on both sides of the annular boss 24. In other words, the annular boss 24 is located between the two elastic members 30, as shown in the figure. This will achieve even better noise and vibration reduction effects.

11: Attack Section

12: End cap

13: Conical segment

21: Grip Section

22: Connecting Section

23: Wearing Section

24: Annular boss

30: Elastic material

Claims (7)

A double-layer sleeve-type baseball bat structure comprises: An outer tube having a striking section with a uniform outer diameter, an end cap at one end of the striking section, and a tapered section with a tapered outer diameter at the other end; An inner tube integrally formed of carbon fiber material, having a grip section at one end of the inner tube, a connecting section with a tapered outer diameter at one end of the grip section, and a penetration section with a uniform outer diameter at one end of the connecting section. The inner tube penetrates the outer tube and is connected to the tapered section of the outer tube via the connecting section. The penetration section is provided with an annular boss having an outer diameter greater than that of the inner tube penetration section. A double-layer sleeve-type baseball bat structure as described in claim 1, wherein the hardness of the annular boss is greater than the hardness of the outer tube hitting section. A double-layer sleeve-type baseball bat structure as described in claim 1, wherein the position of the annular boss corresponds to that within the striking section of the outer tube. The double-layer sleeve-type baseball bat structure as described in claim 3 further includes an elastic material provided on the inner tube and located on one side of the annular boss. A double-layer sleeve-type baseball bat structure as described in claim 4, wherein the elastic material is arranged on the side of the annular boss close to the grip section. The double-layer sleeve-type baseball bat structure as described in claim 4, wherein the elastic material is arranged on the side of the annular boss away from the grip section. The double-layer sleeve-type baseball bat structure as described in claim 1 further includes two elastic materials disposed on the upper portion of the inner tube, on both sides of the annular boss, so that the annular boss is located between the two elastic materials.