CN2666500Y - Improved baseball bat - Google Patents

Abstract

The utility model provides a baseball bat of improvement, it includes: a back core tube made of Fiber Reinforced Plastic (FRP) and having a front end and a back end; a catching layer made of foam and coated on the peripheral surface of the rear core tube; a front core tube made of fiber reinforced plastic and having a front end and a rear end, and the rear end of the front core tube is joined to the front end of the rear core tube; a ball hitting layer made of wood and coated on the peripheral surface of the front core tube.

Description

modified baseball bat

technical field

The utility model relates to a baseball bat, in particular to a baseball bat with low cost, quick manufacture and effective shock absorption.

Background technique

The bats used in baseball can be roughly divided into three categories: wooden bats, aluminum bats and carbon fiber bats. Among them, the disadvantage of the wooden bat is that it is heavy, so the batter is more strenuous when swinging the bat, and the swing speed is slower, which makes the hit ball less powerful and the flight distance is shorter; secondly, the structure of the wooden bat is relatively fragile. It is easy to crack or even break; moreover, the vibration produced by the wooden stick when it hits the ball is very violent, which will make the batter's hand feel numb and even cause injury. Although aluminum bats are lighter in weight and stronger and more durable than wooden bats (but there may still be dents in the hitting part), they still have the problem of violent vibration when hitting the ball, and they will also emit sharp and harsh hitting sounds and after-effects. ring. As for the carbon fiber bats developed in recent years, although they are light in weight and have a strong structure, they still cannot effectively absorb the shock and vibration when hitting the ball. Moreover, carbon fiber bats are more expensive because they use more composite materials and are more difficult to manufacture. , is not acceptable to ordinary consumers.

technical content

The main purpose of this utility model is to provide an improved baseball bat, which is lighter in weight, can increase the swing speed and strengthen the hitting power; moreover, the structure strength of the baseball bat is high, and it is not easy to break or bend; moreover , the baseball bat can effectively absorb the shock when hitting the ball so as to reduce the discomfort of the batter's hands.

Another object of the present invention is to provide an improved baseball bat, which can be assembled more quickly and at a lower manufacturing cost.

Another object of the present invention is to provide an improved baseball bat whose surface at the hitting part is less prone to damage.

In order to achieve the above purpose, the baseball bat provided by the utility model includes:

A rear core tube, made of fiber reinforced plastic (FRP), has a front end and a rear end;

A grasping layer, made of foam, covering the outer peripheral surface of the rear core tube;

A front core tube, made of fiber reinforced plastic, has a front end and a rear end, and is joined to the front end of the rear core tube with its rear end; and

A batting layer is made of wood and covers the outer peripheral surface of the front core tube.

Wherein: the batting layer is formed by splicing and sticking a plurality of wooden strips around the front core tube.

Wherein: the direction of the wood grain on the section of each bar roughly corresponds to the radial direction.

Wherein: the outer peripheral surface of the batting layer is covered with a reinforcing layer, and the material of the reinforcing layer is fiber-reinforced plastic.

Wherein: the front core tube is in the shape of a circular vertebral tube gradually expanding from the rear end to the front end.

Wherein: the front end of the rear core tube protrudes out of the grasping layer by a predetermined length, and the protruding part is inserted into the rear end of the front core tube, thereby being coaxially fixed with the front core tube.

Wherein: the rear end of the front core tube is provided with an engaging ring, and the front end of the rear core tube is plugged into the center of the engaging ring.

Wherein: the rear end edge of the inner peripheral surface of the front core tube forms an inner convex ring, and the joint ring is embedded there, and is complementary embedded with the inner convex ring.

Wherein: the rear end surface of the ball-hitting layer abuts against the front-end surface of the gripping layer, and the ball-hitting layer forms a smooth joint with the outer peripheral surface of the gripping layer.

Wherein: a shock-absorbing block is stuffed in a predetermined position inside the rear core tube.

Wherein: the rear opening of the rear core tube is filled with a rear plug, and the front opening of the front core tube is sealed with a front plug.

Wherein: the axial length of the grasping layer is 19 to 20 inches, and the axial length of the hitting layer is 12 to 14 inches.

Description of drawings

Below cooperate with accompanying drawing to enumerate some preferred embodiments and describe in detail structure and effect of the present utility model, wherein first brief description is as follows to accompanying drawing used:

Fig. 1 is the axial sectional view of the baseball bat of the first preferred embodiment of the present invention;

Fig. 2 is an exploded view corresponding to Fig. 1 of the first preferred embodiment of the utility model;

Fig. 3 is a cross-sectional view taken along line 3-3 in Fig. 1, showing the cross-section of the gripping part of the baseball bat;

Fig. 4 is a cross-sectional view taken along the section line 4-4 in Fig. 1, showing the section of the hitting part of the baseball bat;

Fig. 5 is similar to Fig. 4, and is another embodiment of the batting part of the baseball bat of the present utility model;

Fig. 6 is an axial sectional view of a baseball bat according to a second preferred embodiment of the present invention;

Fig. 7 is an axial sectional view of a baseball bat according to a third preferred embodiment of the present invention; and

Fig. 8 is an axial sectional view of a baseball bat according to a fourth preferred embodiment of the present invention.

Detailed ways

Please refer to Fig. 1 to Fig. 4 first, the representative symbol of the improved baseball bat provided by the first preferred embodiment of the present invention is 10 in the figure, and it includes:

A rear core tube (12), which is a straight circular tube with a constant outer diameter, approximately 21 to 23 inches in length, has a front end (14) and a rear end (16). The rear core tube (12) is made of fiber reinforced plastic (FRP), and this embodiment uses carbon fiber pre-impregnated with epoxy resin.

A grasping layer (18), generally in the shape of a tube, is tightly wrapped on the outer peripheral surface of the rear core tube (12). In this embodiment, the length of the grasping layer (18) is 19 to 20 inches, and its The rear end edge is cut flush with the rear end edge of the back core tube (12), and the front edge is about 2 to 3 inches from the front end edge of the back core tube (12), in other words, the front end (14) of the back core tube (12) It is the aforementioned length (as shown in Figure 2) of protruding grasping layer (18). The profile of this gripping layer (18) corresponds to the shape of the second half of a general baseball bat, that is, the central section is roughly in the shape of a round rod, which can be grasped by the batter with both hands, and a convex ball (knob) (22) is formed at the rear end ), and the front end presents a conical shape that gradually expands from the back to the front. The grasping layer (18) is made of foam, and this embodiment uses polyurethane (Polyurethane; PU). In practical production, the prefabricated rear core tube (12) can be placed into a specific mold and filled with foaming material on its outer periphery, and the grasping layer (18) can be produced by molding, or, The grasping layer (18) can also be made independently (such as injection molding), and then covered on the outer peripheral surface of the back core tube (12) by fitting.

A rear plug (24) is used to plug the opening of the rear end (16) of the rear core tube (12).

A front core tube (26) is also made of fiber-reinforced plastics (this embodiment also adopts carbon fiber), and its outer diameter is larger than the rear core tube (12), and it is from the rear end (28) to the front end (32) ) gradually widening conical tube, and the length is about 12 to 14 inches. The rear end edge of the inner peripheral surface of the front core tube (26) forms an inner convex ring (34), and the inner rear end of the front core tube (26) is embedded with a joint ring (36) in advance, and the joint ring (36) and The inner convex ring (34) is complementary embedded, and in addition, the inner diameter of the adapter ring (36) corresponds to the outer diameter of the back core tube (12), and the axial length of the adapter ring (36) is also approximately equal to the back core tube ( 12) The length of the front end (14) protruding from the adjacent part (that is, the aforementioned 2 to 3 inches). The front core tube (26) coaxially joins its rear end (28) to the front end (14) of the rear core tube (12). The out part is embedded in the center of the joint ring (36) at the rear end (28) of the front core tube (26), and is fixedly connected by means of gluing or screwing.

A ball-hitting layer (38), roughly in the shape of a tube, is tightly wrapped on the outer peripheral surface of the front core tube (26). The rear edge of the pipe (26), and the front end slightly protrudes beyond the front core pipe (26), and the front section of its periphery is cylindrical and the rear section presents a conical shape that shrinks from front to back. At the same time, the hitting layer ( 38) Not only the rear end surface abuts against the front end surface of the grasping layer (18), but also the outer peripheral surfaces of the two (38) (18) present a smooth joint. The material of the hitting layer (38) is hard wood (such as hickory), please refer to Fig. 4, in the present embodiment, this hitting layer (38) that cross section is circular arc is made of several cross sections. Shaped wooden strips (42) are glued together, surrounded symmetrically by ten strips (42) among the figure, certainly also can be other numbers (such as shown in Figure 5 with two strips (42 ') inversion), and is not limited to symmetrical forms. During manufacture, the wooden strips (42) are glued to the outer peripheral surface of the front core tube (26), and then turned to complete the ball-hitting layer (38) with a smooth surface. In addition, when making the bars (42), the direction of the wood grain (44) on the section of each bar (42) roughly corresponds to the radial direction of the circular section in response to the natural grain of the wood. Of course, the ball-hitting layer in the present invention may also be integrally formed by a single piece of wood, and covered on the outer peripheral surface of the front core tube by fitting.

A reinforcement layer (46), made of fiber-reinforced plastic (graphite fibers are used in this embodiment), is annularly coated on the local joint area of the outer peripheral surface of the wooden batting layer (38), and the aforementioned area corresponds to the most Commonly used to hit the key parts of the ball.

A front plug (48) is sealed to the opening of the front end (32) of the front core tube (26), and its surface is aligned with the front end of the ball-hitting layer (26).

The above is the detailed structure of the improved baseball bat (10) provided by the first preferred embodiment of the present invention. The advantages of this baseball bat are as follows:

1. Since both the rear core tube (12) and the front core tube (26) are hollow, and the specific gravity of the fiber-reinforced plastic and foam is lower than that of wood, the overall weight of the baseball bat is lighter than ordinary wooden bats Many, resulting in faster swing speeds, stronger hits and longer distances.

2. Since the center of the baseball bat has a fiber-reinforced plastic core tube (12) (26), it is not easily broken or bent. In addition, the outer peripheral surface of the hitting layer (38) is covered with a reinforcing layer (46) of fiber-reinforced plastic, so that the surface is not easily broken or dented.

3. The grip layer (18) of the foam material can not only make the grip more comfortable, but also can effectively absorb the vibration when the bat hits the ball, thereby greatly reducing the discomfort of the batter's hand, and avoiding sports injury.

Four, the manufacture and assembly of the baseball bat are very easy and fast, and the production cost is relatively low.

5. When hitting the ball, it will not make a sharp and harsh sound like an aluminum rod.

Next, other preferred implementation forms of the utility model in practice are described. Please refer to Fig. 6, the baseball bat (50) of the second preferred embodiment of the present utility model is similar to the previous embodiment, the difference is only that the front core tube (52) is in the shape of a round tube with the same outer diameter, so, it is the same as the previous embodiment. Compared with the structure of an embodiment ( FIG. 1 ), the ball-hitting section of the ball-hitting layer ( 54 ) in this embodiment has a thicker tube wall.

The difference between the baseball bat (60) of the third preferred embodiment of the present invention shown in FIG. 7 and the aforementioned embodiments is that the surface of the batting layer (62) is not coated with the aforementioned reinforcing layer.

Please refer to Fig. 8 again, the baseball bat (70) of the present embodiment has the front core pipe (72) that is round tube, and the surface of the hitting layer (74) does not have the coating reinforcing layer; A shock-absorbing block (78) is stuffed in an appropriate position inside the back core tube (76), and its material is a foam (cork can also be selected for use), which can further improve the cushioning effect and make the vibration of the bat delivered to the batter's hand more effective. Small, so that the hitter will not feel sore when hitting the ball.

Claims (12)

1. An improved baseball bat, characterized in that it comprises: A rear core tube, made of fiber reinforced plastic, has a front end and a rear end; A grasping layer, made of foam, covering the outer peripheral surface of the rear core tube; A front core tube, made of fiber reinforced plastic, has a front end and a rear end, and is joined to the front end of the rear core tube with its rear end; and A batting layer is made of wood and covers the outer peripheral surface of the front core tube. 2. The improved baseball bat according to claim 1, wherein: the batting layer is formed by a plurality of wooden strips glued around the front core tube. 3. The improved baseball bat according to claim 2, wherein: the direction of the wood grain on the section of each bar roughly corresponds to the radial direction. 4 . The improved baseball bat according to claim 1 , wherein: the outer peripheral surface of the batting layer is coated with a reinforcing layer, and the material of the reinforcing layer is fiber-reinforced plastic. 5. The improved baseball bat according to claim 1, wherein: the front core tube is in the shape of a conical tube gradually expanding from the rear end to the front end. 6. The improved baseball bat according to claim 1, wherein: the front end of the rear core tube protrudes out of the grasping layer by a predetermined length, and the protruding part is inserted into the front core tube The rear end is coaxially fixed with the front core tube. 7 . The improved baseball bat according to claim 6 , wherein: a joint ring is provided inside the rear end of the front core tube, and the front end of the rear core tube is plugged into the center of the joint ring. 8 . 8. The improved baseball bat according to claim 7, wherein: the rear end edge of the inner peripheral surface of the front core tube forms an inner convex ring, and the engaging ring is embedded there, and the inner convex ring Ring complementary inserts. 9. The improved baseball bat according to claim 1, wherein: the rear end surface of the hitting layer abuts against the front end surface of the gripping layer, and the outer periphery of the hitting layer and the gripping layer Surfaces form a smooth joint. 10 . The improved baseball bat according to claim 1 , wherein: a shock-absorbing block is stuffed at a predetermined position inside the rear core tube. 11 . 11. The improved baseball bat according to claim 1, wherein: the rear opening of the rear core tube is filled with a rear plug, and the front opening of the front core tube is sealed with a front plug. 12. The improved baseball bat of claim 1, wherein: the gripping layer has an axial length of 19 to 20 inches, and the hitting layer has an axial length of 12 to 14 inches.

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