FIN WITH SECONDARY BLADE SET
Fins with a secondary blade set including a foot pocket portion, a main blade and a secondary blade set are provided. The foot pocket portion is used to fit a user's foot. The main blade includes a first end and a second end. The first end is fixed to the foot pocket portion and the second end is extended along the first direction that is away from the foot pocket portion. The secondary blade set includes at least one secondary blade which is disposed on the main blade via a fixing portion.
This application claims priority to U.S. Provisional Application No. 62/677,684 filed on May 30, 2018 and Taiwan Patent Application No. 108106579 filed on Feb. 26, 2019, which are hereby incorporated by reference in its entirety.
BACKGROUND OF THE INVENTION Field of the InventionThe present invention provides fins, and in particular, fins that are used for snorkeling or diving sports with a secondary blade set.
Descriptions of the Related ArtDuring water sports such as snorkeling, diving activities or the like, people usually wear fins to increase the water-kicking area to generate a sufficient pushing force. As shown in
However, regardless of the skills, manners and strength of the legs of the user when kicking the water, or the use of fin forms with different ribs and cavities, the web surface of the web portion will shake, incline, sway or the like during the water-kicking action under the disturbance of water resistance of different strengths and from different directions as long as the fins are flat-plate fins, thereby, influencing the pushing efficiency (as shown in
An objective of the present invention is to provide fins with a secondary blade set, which can provide a sufficient or even enhanced pushing force while reducing the load on the legs of a user during the water sport.
To achieve the aforesaid objective, the fins of the present invention comprises a foot pocket portion, a main blade and a secondary blade set. The foot pocket portion is for a user's foot to insert therein. The main blade comprises a first end and a second end. The first end is fixed to the foot pocket portion, while the second end is extended along the first direction that is away from the foot pocket portion. The secondary blade set comprises at least one secondary blade which is disposed on the main blade via a fixing portion.
To achieve the aforesaid objective, the secondary blade set included in the fins of the present invention is formed integrally with the main blade.
To achieve the aforesaid objective, an included angle between the at least one secondary blade and the main blade of the fins of the present invention is between 0 degree to 90 degrees.
To achieve the aforesaid objective, the main blade included in the fins of the present invention comprises an upper surface facing the user and a lower surface opposite to the upper surface. When the at least one secondary blade comprises a plurality of secondary blades, the secondary blades are disposed on the upper surface and the lower surface respectively in a corresponding manner or an alternating manner.
To achieve the aforesaid objective, the main blade included in the fins of the present invention further comprises at least one fixing hole, through which the fixing portion of the at least one secondary blade is passed, so that the at least one secondary blade is disposed on the main blade.
To achieve the aforesaid objective, the main blade included in the fins of the present invention comprises an upper surface facing the user and a lower surface opposite the upper surface. The fixing portion is disposed on at least one of the upper surface or the lower surface by locking, snapping-in or bonding.
To achieve the aforesaid objective, in the fins of the present invention, the first length of the main blade extending along the first direction is unequal to the second length of the at least one secondary blade extending along the first direction.
To achieve the aforesaid objective, the fixing portion of the secondary blade set included in the fins of the present invention is disposed on the main blade, and located between one-quarter to three-quarters of the first length of the main blade.
To achieve the aforesaid objective, the secondary blade set included in the fins of the present invention has a height perpendicular to the main blade. The height is at least 40 millimeters.
To achieve the aforesaid objective, the secondary blade set included in the fins of the present invention has a blade thickness. The blade thickness increases from the end away from the foot pocket portion to the other end closer to the foot pocket portion.
To achieve the aforesaid objective, the blade thickness of the secondary blade set included in the fins of the present invention ranges between 3 millimeters to 15 millimeters.
To achieve the aforesaid objective, the material of the secondary blade set included in the fins of the present invention comprises metal.
To achieve the aforesaid objective, the secondary blade set included in the fins of the present invention extends along the second direction, and an included angle between the second direction and the first direction is between 0 degree to 45 degrees.
To achieve the aforesaid objective, the secondary blade set included in the fins of the present invention comprises an external profile or a section shape which is fish fin-like, triangular, trapezoidal, rectangular, L-shaped or S-shaped.
The detailed technology and preferred embodiments implemented for the subject invention are described in the following paragraphs accompanying the appended drawings for people skilled in this field to well appreciate the features of the claimed invention.
The foot pocket portion 100 may be used for a user's foot to insert therein when the user is performing a water sport such as snorkeling or diving. The foot pocket portion 100 may be selected to be a full-foot foot pocket portion (as shown in
As shown in
In detail, the secondary blade set 300 may be disposed in many manners in response to requirements of different water sports performed by the user. As shown in
Additionally, in the present invention, the first length L1 of the main blade 200 extending along the first direction D1 may be unequal to the second length L2 of each of the secondary blades 310 of the secondary blade set 300 extending along the first direction D1. That is, depending on the region where the user intends to perform the water sport or the purpose that the user intends to achieve during the water sport, the second length L2 of the secondary blade 310 may be generally equal to that of the main blade 200 as shown in
The main blade 200 and the secondary blade set 300 may be formed integrally as shown in
In the aspect where the main blade 200 and the secondary blade set 300 are assembled with each other, the main blade 200 may further comprise at least one fixing hole 206. The fixing portion 312 of the at least one secondary blade 310 can pass through the at least one fixing hole 206 so that the at least one secondary blade 310 is disposed on the main blade 200. Furthermore, as shown in
With reference to
Additionally, as shown in
With reference to
With reference to
On the other hand, as observed from the top view of
With reference to both
In this way, with the arrangement of the secondary blade set 300, the user can indeed perform water shearing when the user is wearing the fins 10 to perform a water sport so that the water is split by the secondary blade 310 and smoothly passes through the web surface of the main blade 200. Thus, the water will not press against each other on the web surface to generate a disturbing resistance, thereby, reducing the incline and swaying of the main blade during usage in the prior art, and providing the user with a stable pushing force (as shown in
Additionally, the fins 10 provided with the secondary blade set 300 of the present invention can generate a pushing force even if the fins 10 operate in a non-up-and-down manner (such as in frog-type water-kicking action) so that it is easier for the user to tune the amount of the pushing force and the speed required, thereby, making it more convenient for the user to observe aquatic creatures.
In other words, the advantage of the fins 10 provided with the secondary blade set 300 of the present invention is that in the case where the soft degree of the main blade 200 is not changed to maintain the original pushing force, the user is allowed to have sufficient water sensation during diving and snorkeling sports and can feel more relaxed and smooth. The difficulty of the operation can be reduced; for example, the user can easily move in the water with a posture of a relatively high degree of difficulty, without being limited by the swimming skill of the user. At the same time, the consumption of the strength and the oxygen consumption of the user are reduced, and thus, the pushing efficiency is improved.
The above disclosure is related to the detailed technical contents and inventive features thereof. People skilled in this field may proceed with a variety of modifications and replacements based on the disclosures and suggestions of the invention as described without departing from the characteristics thereof. Nevertheless, although such modifications and replacements are not fully disclosed in the above descriptions, they have substantially been covered in the following claims as appended.
Claims
1. A fins with a secondary blade set, comprising;
- a foot pocket portion, for a user's foot to insert therein;
- a main blade, comprising a first end and a second end, wherein the first end is fixed to the foot pocket portion and the second end is extended along a first direction that is away from the foot pocket portion; and
- a secondary blade set, comprising at least one secondary blade which is disposed on the main blade via a fixing portion.
2. The fins according to claim 1, wherein the secondary blade set is formed integrally with the main blade.
3. The fins according to claim 1, wherein an angle included between the at least one secondary blade and the main blade is between 0 degree to 90 degrees.
4. The fins according to claim 1, wherein the main blade comprises an upper surface facing the user and a lower surface opposite to the upper surface, and when the at least one secondary blade comprises a plurality of secondary blades, the secondary blades are disposed on the upper surface and the lower surface respectively in a corresponding manner or an alternating manner.
5. The fins according to claim 1, wherein the main blade further comprises at least one fixing hole, through which the fixing portion of the at least one secondary blade is passed, so that the at least one secondary blade is disposed on the main blade.
6. The fins according to claim 1, wherein the main blade comprises an upper surface facing the user and a lower surface opposite to the upper surface, and the fixing portion of the at least one secondary blade is disposed on at least one of the upper surface or the lower surface by locking, snapping-in or bonding.
7. The fins according to claim 1, wherein a first length of the main blade extending along the first direction is unequal to a second length of the at least one secondary blade extending along the first direction.
8. The fins according to claim 1, wherein the fixing portion of the secondary blade set is disposed on the main blade, and located between one-quarter to three-quarters of a first length of the main blade.
9. The fins according to claim 1, wherein the secondary blade set has a height perpendicular to the main blade, and the height is at least 40 millimeters.
10. The fins according to claim 1, wherein the secondary blade set has a blade thickness, and the blade thickness increases from an end away from the foot pocket portion to another end closer to the foot pocket portion.
11. The fins according to claim 10, wherein the blade thickness is between 3 millimeters to 15 millimeters.
12. The fins according to claim 1, wherein a material of the secondary blade set comprises metal.
13. The fins according to claim 1, wherein the secondary blade set extends along a second direction, and an included angle between the second direction and the first direction is between 0 degree to 45 degrees.
14. The fins according to claim 1, wherein the secondary blade set comprises an external profile or a section shape which is fish fin-like, triangular, trapezoidal, rectangular, L-shaped or S-shaped.
Type: Application
Filed: May 29, 2019
Publication Date: Dec 5, 2019
Inventor: Chih-Cheng SHIUE (Taipei)
Application Number: 16/424,753