TWM672690U - Fin structure - Google Patents

Abstract

A fin structure comprises a long sheet-shaped fin plate with a shoe cover attached to its front end. The fin plate comprises a cross-fiber plate, a first light-transmitting layer stacked downwardly and bonded to a first upper surface of the cross-fiber plate, and a first patterned layer disposed below the first light-transmitting layer. The first patterned layer is sandwiched between the first light-transmitting layer and the first upper surface of the cross-fiber plate. A second light-transmitting layer having the same shape and material as the first light-transmitting layer is stacked upwardly and bonded to the first lower surface of the cross-fiber plate. This structure reduces overall weight, provides sufficient strength, and prevents distortion. Furthermore, the first patterned layer maintains its original appearance after prolonged use.

Description

Fin structure

This project is about a fin structure, specifically one that is strong enough to reduce overall weight while maintaining the original appearance of the fin blade.

Whether diving with an oxygen tank or snorkeling leisurely on the surface, wearing fins effectively increases thrust both in and out of the water. Whether they're "over-foot fins" that slip directly on your feet or "adjustable fins" that require you to put on overshoes first and then fins, fins made of rubber, PU, or other composite plastics don't significantly affect kicking efficiency; as long as the material is strong enough and not too soft, they still provide decent thrust.

To reduce overall weight while maintaining sufficient strength and elasticity, current long fin blades typically utilize a multi-layer fiber structure. This is essentially a stack of identically sized and shaped fiber layers, bonded together with resin, and then hardened through a heating and pressure process. This resulting fin blade possesses sufficient strength while remaining flexible enough to compromise propulsion during maneuvering. Furthermore, to enhance the color palette of the fin blade, various patterns and colors are applied to the surface through printing, gluing, or spraying. However, in actual use, after long-term use, the above patterns or colors may easily be worn or eroded by sea water and may not maintain their original appearance.

In view of this, in order to provide a structure that is different from the commonly used technology and to improve the above-mentioned shortcomings, the creators have accumulated many years of experience and continuous research and development and improvement, thus creating this creation.

One of the goals of this invention is to provide a fin structure that can address the problem of fins losing their original appearance due to wear and corrosion after prolonged use. By bonding a first and second light-transmitting layer to the upper and lower surfaces of a cross-fiber board, and a first patterned layer to the lower surface of the first light-transmitting layer, sandwiching the first patterned layer between the first light-transmitting layer and the cross-fiber board, the fin structure reduces overall weight, provides sufficient strength, and prevents distortion, while allowing the first patterned layer to maintain its original appearance, ensuring product quality.

To achieve the aforementioned objectives, the fin structure of this invention comprises a long, sheet-like fin plate with a front end and a rear end along its longitudinal direction. The front end of the fin plate is adapted to be attached to a shoe cover. Its main technical features are: the fin plate comprises a cross-fiber plate, a first light-transmitting layer, a first patterned layer, and a second light-transmitting layer. The cross-fiber plate has a first upper surface and a first lower surface. The first light-transmitting layer is stacked downwardly and bonded to the first upper surface of the cross-fiber plate. The lower surface of the first light-transmitting layer comprises a first patterned layer, which is sandwiched between the first light-transmitting layer and the cross-fiber plate. The second light-transmitting layer has the same shape and material as the first light-transmitting layer and is stacked upwardly and bonded to the first lower surface of the cross-fiber plate.

In practice, the cross-fiber plate, the first light-transmitting layer, and the second light-transmitting layer have the same size and shape.

In practice, the cross-fiber sheet is a carbon fiber sheet, and the first light-transmitting layer and the second light-transmitting layer are respectively long sheets of polyethylene terephthalate (PET) sheets.

In practice, the invention further includes a second pattern layer, which is stacked and bonded to the upper surface of the second light-transmitting layer, so that the second pattern layer is sandwiched between the second light-transmitting layer and the cross-linked fiber board.

During implementation, the invention further includes a first covering layer and a second covering layer, wherein the first covering layer is stacked downward and bonded to the upper surface of the first light-transmitting layer, and the second covering layer is stacked upward and bonded to the lower surface of the second light-transmitting layer.

In practice, the cross-fiber board includes an upper layer, a middle layer, and a lower layer stacked and bonded in sequence. The upper layer, the middle layer, and the lower layer are respectively long fiber boards. The upper layer has a first length in the long direction, the middle layer has a second length in the long direction, and the lower layer has a third length in the long direction. The first length is shorter than the second and third lengths, and the third length is shorter than the second length.

During implementation, the upper layer and one end of the middle layer in the longitudinal direction have the same size and shape, so that the upper layer can be fully stacked and connected to one end of the middle layer.

In practice, the upper layer has a first width in the short direction, and the middle layer has a second width in the short direction, wherein the first width is shorter than the second width.

In practice, this invention further includes a supporting rib layer, which is a long strip of fiber board. The supporting rib layer has a left edge and a right edge in the short direction of the upper layer. The supporting rib layer is stacked and connected to the upper layer, and the supporting rib layer is located in the middle position between the left edge and the right edge of the upper layer.

To facilitate a deeper understanding of this work, the following is a detailed description:

This invention's fin structure features a fin plate, the front end of which is designed to be attached to a shoe cover. The fin plate primarily comprises a cross-fiber plate, a first transparent layer, a first patterned layer, and a second transparent layer. The cross-fiber plate has a first upper surface and a first lower surface. The first transparent layer is stacked downwardly and bonded to the first upper surface of the cross-fiber plate. The lower surface of the first transparent layer has a first patterned layer, sandwiched between the first transparent layer and the cross-fiber plate. The second transparent layer has the same shape and material as the first transparent layer and is stacked upwardly and bonded to the first lower surface of the cross-fiber plate.

Referring to FIG. 1 , the fin structure 1 of this invention is in the form of an elongated sheet, comprising a fin plate 10 having a front end and a rear end along its longitudinal direction. The front end of the fin plate 10 is coupled to a shoe cover 12 via a bend 11. When the user wears the shoe cover 12, the rear end of the invention swings relative to the front end, thereby increasing forward thrust in or on the surface of the water.

Figure 2 shows a first embodiment of the fin structure 1 of this invention, wherein the fin plate 10 primarily comprises a first covering layer 2 and, stacked downwardly from below the first covering layer 2, a first light-transmitting layer 3, a first patterned layer 4, a cross-fiber sheet 5, a second patterned layer 6, a second light-transmitting layer 7, and a second covering layer 8. The first covering layer 2, the first light-transmitting layer 3, the cross-fiber sheet 5, the second light-transmitting layer 7, and the second covering layer 8 are of the same size and shape, and the first covering layer 2 and the second covering layer 8 are respectively rectangular glass fiber sheets; the first covering layer 2 is stacked downward and bonded to the upper surface of the first light-transmitting layer 3, and the second covering layer 8 is stacked upward and bonded to the lower surface of the second light-transmitting layer 7, thereby achieving the effect of light transmission and protecting the first light-transmitting layer 3 and the second light-transmitting layer 7 respectively.

The cross-fiber board 5 has a first upper surface 51 and a first lower surface 52 on its upper and lower sides, respectively. The first light-transmitting layer 3 and the second light-transmitting layer 7 have the same shape and material. In this embodiment, the first light-transmitting layer 3 and the second light-transmitting layer 7 are respectively long sheets of transparent polyethylene terephthalate (PET). terephthalate) board; a first patterned layer 4 is stacked and bonded on the lower surface of the first light-transmitting layer 3, so that the first patterned layer 4 is sandwiched between the lower surface of the first light-transmitting layer 3 and the first upper surface 51 of the cross-fiber plate 5. During implementation, the first patterned layer 4 has at least one pattern or color; a second patterned layer 6 is stacked and bonded on the upper surface of the second light-transmitting layer 7, so that the second patterned layer 6 is sandwiched between the upper surface of the second light-transmitting layer 7 and the first lower surface 52 of the cross-fiber plate 5. During implementation, the second patterned layer 6 has at least one pattern or color.

As shown in Figures 2 and 3, the cross-fiber plate 5 is a stacked plate comprising a top layer 53, a middle layer 54, and a bottom layer 55 stacked and bonded in sequence from top to bottom. The top layer 53, the middle layer 54, and the bottom layer 55 are each a woven fiber plate. In this embodiment, the top layer 53, the middle layer 54, and the bottom layer 55 are each a long carbon fiber plate, each made of carbon fiber cloth bonded and hardened with resin. In practice, any carbon fiber plate can also be formed by stacking two carbon fiber cloths each having oblique carbon fibers. Similarly, the oblique carbon fibers of the two layers of carbon fiber cloth can be interlaced to produce high structural strength.

The upper layer 53 has a first length L1 in the long direction, the middle layer 54 has a second length L2 in the long direction, and the lower layer 55 has a third length L3 in the long direction, wherein the first length L1 is shorter than the second length L2 and the third length L3, and the third length L3 is shorter than the second length L2; in addition, one end of the upper layer 53 and the middle layer 54 in the long direction have the same size and shape, so that the upper layer 53 can be fully stacked and bonded to the surface of one end of the middle layer 54.

Thus, when the user wears the shoe cover 12 and allows the rear end of the fin 10 to swing relative to the front end, different stacking thicknesses can be formed on different areas of the fin by stacking the upper layer 53, the middle layer 54 and the lower layer 55 of different lengths, thereby producing different strength and flexibility distributions. Under the requirement of sufficient strength, the overall weight can be effectively reduced. The first pattern layer 4 is sandwiched between the lower surface of the first light-transmitting layer 3 and the first upper surface 51 of the cross-fiber plate 5, and the upper surface of the second light-transmitting layer 7 and the first upper surface 51 of the cross-fiber plate 5 are sandwiched between the first pattern layer 4 and the second pattern layer 7. By sandwiching the second pattern layer 6 between the lower surface 52, the first and second light-transmitting layers 3 and 7 can protect the fin 10 from wear and tear even after prolonged use, thereby maintaining the original appearance of the first and second pattern layers 4 and 6, thereby ensuring product quality. Furthermore, by bonding the first light-transmitting layer 3 to the first upper surface 51 of the cross-fiber sheet 5 and bonding the second light-transmitting layer 7 to the first lower surface 52 of the cross-fiber sheet 5, and by having the first and second light-transmitting layers 3 and 7 having the same shape and material, the fin board 10 can remain flat and prevent distortion.

FIG4 shows a second embodiment of the fin structure 1 of the present invention. The difference from the first embodiment is that: the upper layer 53' of the cross-fiber plate 5' has a first width W1 in the short direction, and the first width W1 has a left edge 511 and a right edge 512 on both sides; the middle layer 54 has a second width W2 in the short direction, and the first width W1 is shorter than the second width W2; a supporting rib layer 5 is overlapped and combined above the upper layer 53. 6. The supporting rib layer 56 is a long strip of fiber board, and the supporting rib layer 56 is located in the middle position between the left edge 511 and the right edge 512 of the upper layer 53, and is parallel to the left edge 511 and the right edge 512. This increases the strength of the front end of the cross-fiber board 5' and produces stronger swing support at the midline position of the cross-fiber board 5', that is, increases the strength against bending, thereby producing a smoother and greater rebound propulsion effect.

In summary, based on the content disclosed above, this invention can indeed achieve its intended purpose, providing a fin structure that not only allows the first and second pattern layers to maintain their original appearance to ensure product quality, but also forms different stacking thicknesses in different areas of the cross-fiber sheet to produce different strength and flexibility distributions, thereby reducing overall weight. At the same time, it can increase rebound propulsion through the combination of supporting rib layers and the upper layer. This has great value in industrial applications, and a new patent application has been filed in accordance with the law.

1: Fin structure 10: Fin plate 11: Bend 12: Shoe cover 2: First covering layer 3: First light-transmitting layer 4: First pattern layer 5, 5': Cross-woven fiber sheet 51: First upper surface 511: Left edge 512: Right edge 52: First lower surface 53, 53': Upper layer 54: Middle layer 55: Lower layer 56: Support ribs 6: Second pattern layer 7: Second light-transmitting layer 8: Second covering layer L1: First length L2: Second length L3: Third length W1: First width W2: Second width

Figure 1 is a schematic top view of the first embodiment of this invention. Figure 2 is an exploded view of the fin plate of the first embodiment of this invention. Figure 3 is an exploded view of the cross-linked fiberboard of the first embodiment of this invention. Figure 4 is an exploded view of the cross-linked fiberboard of the second embodiment of this invention.

10: Fins

2: First coating layer

3: First light-transmitting layer

4: First pattern layer

5: Cross-linked fiberboard

51: First upper surface

52: First lower surface

53: Upper layer

54:Middle layer

6: Second pattern

7: Second light transmission

8: Second coating layer

Claims (9)

A fin structure comprises a long, sheet-like fin plate having a front end and a rear end in its longitudinal direction, the front end of the fin plate being adapted to be attached to a shoe cover. The fin plate comprises: A cross-fiber plate having a first upper surface and a first lower surface; A first transparent layer stacked downwardly and bonded to the first upper surface of the cross-fiber plate; a first patterned layer having a lower surface of the first transparent layer, the first patterned layer being sandwiched between the first transparent layer and the cross-fiber plate; and A second transparent layer having the same shape and material as the first transparent layer, stacked upwardly and bonded to the first lower surface of the cross-fiber plate. The fin structure of claim 1, wherein the cross-fiber plate, the first light-transmitting layer, and the second light-transmitting layer have the same size and shape. The fin structure of claim 1, wherein the cross-fiber sheet is a carbon fiber sheet, and the first light-transmitting layer and the second light-transmitting layer are respectively long sheets of polyethylene terephthalate (PET) sheets. The fin structure of claim 1 further includes a second pattern layer, which is stacked and bonded to the upper surface of the second light-transmitting layer, so that the second pattern layer is sandwiched between the second light-transmitting layer and the cross-fiber plate. The fin structure of claim 1 further comprises a first covering layer and a second covering layer, wherein the first covering layer is stacked downwardly and bonded to the upper surface of the first light-transmitting layer, and the second covering layer is stacked upwardly and bonded to the lower surface of the second light-transmitting layer. A fin structure as claimed in any one of claims 1 to 5, wherein the cross-fiber sheet comprises an upper layer, a middle layer and a lower layer stacked and combined in sequence, the upper layer, the middle layer and the lower layer are respectively elongated fiber sheets, the upper layer has a first length in its long direction, the middle layer has a second length in its long direction, and the lower layer has a third length in its long direction, the first length is shorter than the second length and the third length, and the third length is shorter than the second length. In the fin structure of claim 6, the upper layer and one end of the middle layer in the longitudinal direction have the same size and shape, so that the upper layer can be fully stacked and combined with the end of the middle layer. The fin structure of claim 6, wherein the upper layer has a first width in a short direction, the middle layer has a second width in a short direction, and the first width is shorter than the second width. The fin structure of claim 8 further includes a supporting rib layer, which is a long strip of fiber board. The short direction of the upper layer has a left edge and a right edge. The supporting rib layer is stacked and combined with the upper layer. The supporting rib layer is located in the middle position between the left edge and the right edge of the upper layer.