CN107583256A - Bat with different tube wall thicknesses - Google Patents

Abstract

A bat with different tube wall thicknesses comprises a tubular ball striking part; a holding part is connected with the tubular striking part, and the outer diameter of the holding part is smaller than that of the tubular striking part; the tubular ball hitting part is formed by laminating a plurality of fiber reinforced plastic layers and comprises a main body area and at least one inner ring area; and the inner ring area extends inwards from part of the inner wall of the main body area in the radial direction by a preset thickness.

Description

Bats with different wall thicknesses

technical field

This invention relates to bat bodies for hitting balls, and more particularly to a bat having different tube wall thicknesses.

Background technique

At present, baseball bats or softball bats are all in the shape of a tube, and the manufacturer of the bat usually solves the problem by increasing the thickness of the wall of the tube in order to make the radial stiffness of the tube meet the regulations of the sports association. But when the tube wall thickness of the rod increases, the weight of the rod will also increase thereupon. As we all know, when the weight of the stick increases, the moment of inertia (moment of inertia) of the stick will also be increased, so that the stick cannot be swung smoothly.

U.S. Patent No. 8,795,108 provides an improved bat to solve the aforementioned problems. More specifically, the improved bat is additionally located inside the sweet spot (sweet spot) of the bat body. A stiffening element is stuffed. However, the defect of such design is that the body of the bat and the rigid member are two independent entities. The process of combining the two, therefore, will not only increase the process, but also consume man-hours. Furthermore, if the stuffing process is faulty, the rigid member may make noise or fall off the tube wall of the rod when the ball is hit.

Contents of the invention

The main purpose of the present invention is to provide a ball bat with different wall thicknesses to solve the deficiency of the prior US patent application. Generally speaking, the bat includes a tubular hitting portion, and a grip portion is connected to the tubular hitting portion. The outer diameter of the tubular gripping portion is smaller than the outer diameter of the tubular hitting portion. It can be connected by a push-pull shape. The tubular batting part and the grip part can be made of the same material or different materials, and the manufacturing methods of such a stick belong to the known technology, and will not be repeated here. The tubular batting part mentioned here is formed by stacking a plurality of fiber-reinforced plastic layers, for example, stacked and wound multiple layers of carbon fiber impregnated with epoxy resin, glass fiber or other suitable fiber boards. The tubular hitting part structurally includes a main body area and at least an inner ring area. The main body area includes a sweet area, and the inner ring area is arranged in or adjacent to the sweet area. The inner ring region has a first axial length and a first radial thickness extending inwardly from the inner peripheral surface of the main body region. Thus, on the one hand, the bat will have the proper radial stiffness due to the inner ring area, and on the other hand, the inner ring area is only arranged in a proper position, so the overall weight of the bat will not exceed predetermined value. In addition, it is more important that the inner ring area and the main body area of the tubular hitting part are integrally formed, that is to say, no additional processing procedures are required when forming the inner ring area, and the inner ring area will not be damaged. The condition of detachment from the body area.

Another feature of the ball bat with different tube wall thicknesses provided by the present invention is that the radial thickness of the inner ring area can be controlled to achieve the purpose of adjusting the radial stiffness of the tubular hitting part. Generally speaking, the inner ring area The first radial thickness is at least about 50% of the radial thickness of the body region.

Another feature of the ball bat with different wall thickness provided by the present invention is that the axial length of the inner ring area can be used to control the radial stiffness and weight of the tubular ball striking part. Generally speaking, the inner ring area The first axial length is at least about 2.5% of the axial length of the tubular striker.

Another feature of the ball bat with different wall thicknesses provided by the present invention is that the shape of the inner ring area can be designed according to actual needs, for example, the axial section of the inner ring area can be rectangular, trapezoidal or stepped.

Description of drawings

Figure 1 is a partial axial cross-sectional view of a first preferred embodiment of the ball bat of the present invention;

Fig. 2 is the sectional view along the 2-2 direction of Fig. 1 of the embodiment shown in Fig. 1, wherein the inner ring area is not included:

Fig. 3 is the sectional view along the 3-3 direction of Fig. 1 of the embodiment shown in Fig. 1, wherein contains an inner ring area;

Fig. 4 is a partially enlarged schematic view of the embodiment shown in Fig. 1;

5 is a partial axial cross-sectional view of a second preferred embodiment of the ball bat of the present invention, the body of which includes two inner ring regions;

6 is a partial axial cross-sectional view of a third preferred embodiment of the ball bat of the present invention, wherein the inner ring region is rectangular in axial cross-section; and

Fig. 7 is a partial axial cross-sectional view of a fourth preferred embodiment of the ball bat of the present invention, wherein the axial cross-section of the inner ring region is stepped.

detailed description

At first please refer to Fig. 1 to Fig. 4, as shown in Fig. 1, a baseball bat or softball bat 10 (hereinafter all referred to as bat) has a tubular hitting portion 12, a grip portion 14 and a push-pull portion 16 connects the tubular hitting part 12 and the grip part 14 . The free end of the gripping portion 14 is a support portion 18 , and the free end of the tubular hitting portion 12 is closed by a cap 20 . In addition, the tubular hitting portion 12 has a sweet spot (Sweet Spot, sweet spot, effective hitting area), which is usually located at 76.2 mm to 203.2 mm from the free end of the tubular hitting portion 12. In the range.

The bat 10 can be integrally formed or formed by connecting several sections. For example, the bat 10 can be made entirely of layers of fiber-reinforced plastic woven boards stacked and wound, or have a fiber-reinforced plastic hitting part and a metal or wood grip.

In this embodiment, the tubular hitting portion 12 is formed by stacking and winding multiple layers of carbon fiber plates impregnated with epoxy resin, and of course it can also be made of other fiber-reinforced plastic materials. Structurally, the tubular ball striking part 12 has a main body area 22 and an inner ring area 24 . The main body area 22 has an inner peripheral surface 26 . The location of the arrangement of the inner ring region 24 may correspond exactly to or be adjacent to the sweet spot of the tubular striker 12 . In the present embodiment, the inner ring region 24 is arranged within a range of 145 mm to 178 mm from the free end of the tubular hitting portion 12 . Generally speaking, in order to achieve the purpose of effectively increasing the radial rigidity of the tubular ball striking portion 12 without affecting the overall weight of the bat 10, the inner ring region 24 has a first axial length and a direction extending from the inner peripheral surface 26 to the inside. Extended first radial thickness.

Please refer to FIG. 2 and FIG. 3 , wherein D1 is the tube wall thickness of the main body area 22 , D2 is the overall tube wall thickness of the main body area 22 and the inner ring area 24 , and the value of D2 is greater than D1. The radial thickness of the inner ring region 24 can be determined according to actual needs, and a preferred design ratio is that the first radial thickness of the inner ring region 24 is at least about 50% of the radial thickness of the main body region. For example, when the radial thickness of the main body region 22 is about 4.5 mm, the first radial thickness of the inner ring region 24 is about 4.2 mm.

In addition, the axial length of the inner ring area 24 must also be designed to match the axial length of the tubular ball hitting portion 12. Generally speaking, the first axial length of the inner ring area 24 is at least about the length of the tubular ball hitting portion 12. 2.5% of axial length. In this embodiment, when the axial length of the tubular ball striking portion 12 is about 391 mm and the first radial thickness of the inner ring region 24 is 4.2 mm, the first axial length of the inner ring region 24 is about 30 mm.

Furthermore, in manufacturing, the axial length of each fiber-reinforced plastic layer in the inner ring region 24 is smaller than the axial length of each fiber-reinforced plastic layer in the main body region 22 . The axial cross-sectional shape of the inner ring area 24 can also be designed as required, for example, the axial cross-section of the inner ring area 24 can be trapezoidal, rectangular or stepped. In this embodiment, as shown in FIG. 4 , there are about 14 fiber-reinforced plastic layers in the inner ring area 24 , and the axial lengths of each dimension-reinforced plastic layer gradually decrease from the inner peripheral surface 26 radially inward, and The axial section of the inner ring region 24 is trapezoidal, wherein the axial length of the bottom side 242 (i.e. the first axial length) is about 30 mm, and the axial length of the top side 244 (i.e. the second axial length) is about 10 mm . When manufacturing the ball bat 10, the fiber-reinforced plastic layers forming the inner ring region 24 are sequentially stacked and wound on a shaft, and then the fiber-reinforced plastic layers of the main body region 22 are sequentially wound, and then Then carry out the rest of the processing procedures. In other words, the main body area 22 and the inner ring area 24 of the tubular ball-shaped part 12 are formed at one time, and no additional combined processing procedures are required.

In summary, the bat 10 only has the inner ring region 24 at or near the sweet spot of the tubular striking portion 12, and because of the greater wall thickness there than in other body regions, of course, there Greater radial stiffness would be possible without adding significantly to the overall weight of the bat 10 . Furthermore, the main body area 22 and the inner ring area 24 of the tubular hitting part 12 are molded at one time, without additional combined processing procedures, and the inner ring area will not fall off when the ball is hit. Therefore the deficiencies in the prior art must be effectively resolved.

Please refer to FIG. 5 again, the bat 50 of the second preferred embodiment of the present invention also has a tubular hitting portion 52 , a grip portion 54 and a push-pull portion 56 connecting the tubular hitting portion 52 and the grip portion 54 . The bat 50 differs from the bat 10 in that the tubular striking portion 52 has two inner annular regions 60, 62 that are spaced apart by a predetermined distance.

As mentioned above, the axial section of the inner ring area of the bat of the present invention is not limited to the trapezoidal shape, it can also be other suitable shapes, such as shown in Figure 6, the bat 70 of the third preferred embodiment of the present invention also has a The tubular ball striking part 72 , a grip part 74 and a push-pull part 76 are connected to the tubular ball striking part 72 and the grip part 74 . The tubular ball striking portion 72 has a main body area 78 and an inner ring area 80 . In this embodiment, the axial section of the inner ring region 80 is rectangular, the axial length of the tubular ball striking portion 72 is about 391mm, the radial thickness of the main body region is about 3mm, and the first radial thickness of the inner ring region 80 It is about 3mm, and the first axial length is at least about 9.8mm, and of course it can be longer. As shown in Figure 7 again, the ball bat 90 of the fourth preferred embodiment of the present invention also has a tubular hitting portion 92, a grip portion 94 and a push-pull portion 96 connecting the tubular hitting portion 92 and the grip portion 94 . The difference between bat 90 and bat 10 is that the inner ring region 98 has a stepped axial section.

Claims (18)

1. a kind of bat, includes：

One tubulose driving part；

One grip part；

One pushing and drawing shape portion, connect the tubulose driving part and the grip part；And

The tubulose driving part is to put to form with multiple fiber reinforcement plastic stackings, include a body region with Ring region at least one, the body region include a sweetspot, the interior ring region be arranged in the sweetspot or The sweetspot is adjacent to, includes one first axial length, and one from the inside circumference of the body region The first radial thickness extended inside.

2. bat as claimed in claim 1, the wherein interior ring region are arranged in from the tubulose driving part certainly In the range of 145mm to 178mm being counted by end.

3. the first axial length of bat as claimed in claim 1, the wherein interior ring region is at least about The 2.5% of the tubulose driving part axial length.

4. the first axial length of bat as claimed in claim 3, the wherein interior ring region is at least about 9.8mm。

5. the axial section of bat as claimed in claim 3, the wherein interior ring region is rectangular.

, should 6. bat as claimed in claim 3, the wherein interior ring region have a bottom side and a top side Bottom side is connected with the inside circumference of the body region, and the axial length of the bottom side is equal to and the interior ring region First axial length, the top side have one second axial length, second axial length be less than this first Axial length.

7. the axial section of bat as claimed in claim 6, the wherein interior ring region is trapezoidal.

8. the axial section of bat as claimed in claim 6, the wherein interior ring region is stepped.

9. the first radial thickness of bat as claimed in claim 1, the wherein interior ring region is at least about The 50% of the body region radial thickness.

10. the first radial thickness of bat as claimed in claim 9, the wherein interior ring region is at least about For 3mm.

11. the axial section of bat as claimed in claim 9, the wherein interior ring region is rectangular.

12. the axial section of bat as claimed in claim 9, the wherein interior ring region is stepped.

13. bat as claimed in claim 9, the wherein interior ring region have a bottom side and a top side, The bottom side is connected with the inside circumference of the body region, and the axial length of the bottom side is equal to the interior ring region First axial length, the top side have one second axial length, second axial length be less than this first Axial length.

14. the axial section of bat as claimed in claim 13, the wherein interior ring region is trapezoidal.

15. a kind of bat, includes：

One tubulose driving part；

One grip part；

One pushing and drawing shape portion, connect the tubulose driving part and the grip part；And

The tubulose driving part is to put to form with multiple fiber reinforcement plastic stackings, include a body region with Ring region at least one, the body region include a sweetspot, the interior ring region be arranged in the sweetspot or The sweetspot is adjacent to, there is one first axial length, and an inside circumference from the body region is past First radial thickness of interior extension；First axial length of the interior ring region is at least about the tubulose driving part The 2.5% of axial length, the first radial thickness of the interior ring region are at least about the body region radial thickness 50%.

16. bat as claimed in claim 15, the wherein interior ring region are arranged in from the tubulose driving part Count in the range of 145mm to 178mm free end.

17. the first axial length of bat as claimed in claim 16, the wherein interior ring region is at least about For 9.8mm.

18. the first radial thickness of bat as claimed in claim 17, the wherein interior ring region is at least about For 3mm.