WO2021018091A1

WO2021018091A1 - Electric fin and watercraft

Info

Publication number: WO2021018091A1
Application number: PCT/CN2020/104880
Authority: WO
Inventors: 王之岳
Original assignee: 东辉休闲运动用品(上海)有限公司
Priority date: 2019-07-29
Filing date: 2020-07-27
Publication date: 2021-02-04
Also published as: CN112298471A

Abstract

The present invention relates to an electric fin and a watercraft. The electric fin comprises a shell extending in a first direction and provided with a water inlet cavity; and a driving member and a propeller arranged in sequence in the first direction, wherein at least part of the driving member is located in the water inlet cavity, the driving member is used for driving the propeller to rotate, and the propeller is located in the water inlet cavity; the propeller is provided with a propeller shaft and a plurality of blades, the propeller shaft extends in the first direction, and the plurality of blades are arranged on the propeller shaft in a circumferential direction; and in the first direction, the driving member is provided with a first end portion, the propeller shaft is provided with a second end portion, the second end portion of the propeller shaft and the first end portion of the driving member are in clearance fit in the first direction, the outer contour shape of the cross section of the second end portion is the same as the outer contour shape of the cross section of the first end portion, and projections of the second end portion and the first end portion in the first direction coincide. The electric fin of the present invention has sufficient power.

Description

Electric fish fin and water transportation tool

Technical field

The invention relates to the technical field of water sports equipment, in particular to an electric fin and a watercraft.

Background technique

One or more fins are usually installed on the bottom of existing surfboards, SUPs or inflatable boats and other watercrafts to enhance the water splitting effect and turning flexibility of the surfboard during operation. For example, the Chinese patent with publication number CN201012744Y discloses an electric surfboard. The tail of the surfboard is thickened, and a motor is installed inside the thickened part. The shaft of the motor extends from the tail of the surfboard, and the shaft is sleeved with a turbine; the thickened section A movable cover is provided on the surface of the surfboard. When in use, the user opens the movable cover and takes out the motor and turbine to use the surfboard for water skiing. In order to save energy, the user can install the motor on the tail of the surfboard. After closing the switch, the motor drives the turbine to rotate and drain, so that The surfboard moves forward, and the user can climb on the surfboard to control the direction by hand.

However, the existing electric fins are fixed at the bottom, and the power is insufficient, and the effect is not good.

Summary of the invention

The problem solved by the present invention is insufficient power of the electric fin.

In order to solve the above-mentioned problems, the object of the present invention is to provide an electric fin, including: a housing extending in a first direction and having a water inlet cavity; a driving member and a propeller arranged in sequence along the first direction, the driving At least partly located in the water inlet cavity, the drive member is used to drive the propeller to rotate, the propeller is located in the water inlet cavity; the propeller has a propeller shaft and a plurality of blades, the propeller shaft along the Extending in the first direction, a plurality of the paddle blades are arranged on the paddle shaft along the circumferential direction; in the first direction, the driving member has a first end, the paddle shaft has a second end, and the The second end portion of the paddle shaft and the first end portion of the driving member are in clearance fit along the first direction, and the outer contour shape of the cross section of the second end portion is consistent with the first end The outer contour shape of the cross section of the propeller shaft is the same, and the projections of the second end and the first end in the first direction coincide; or, the cross section of the second end of the paddle shaft Compared with the outer contour shape of the cross section of the first end of the driving member, the outer contour shape of the driving member is reduced in proportion.

Optionally, the paddle shaft is in the shape of a truncated cone.

Optionally, from the driving member to the direction of the propeller, the cross-sectional area of the propeller shaft gradually decreases from the second end of the propeller shaft to the first end of the propeller shaft. In the first direction, the first end and the second end of the paddle shaft are located on opposite sides of the paddle shaft.

Optionally, one end of the extending direction of each paddle is flush with the edge of the second end.

Optionally, the outer contour shape of the cross section of the portion of the driving member located in the water inlet cavity is the same as the outer contour shape of the cross section of the first end portion.

Optionally, it further includes a flow guide, the driving part, the propeller and the flow guide are arranged in sequence along the first direction, the flow guide is at least partially located in the water inlet cavity, and the inlet The water flow in the water cavity flows out from the deflector;

The deflector has a deflector, a deflector shaft and a plurality of deflectors, the deflector shaft extends along the first direction, and the plural deflectors are arranged on the deflector along the circumferential direction. Shaft, the flow guide is attached to the inner wall of the housing, one end of each flow guide is connected to the inner wall of the flow guide, and the other end is connected to the flow guide shaft;

The size of the projection of the inner wall of the air deflector along the second direction in the third direction gradually decreases along the fourth direction. The first direction, the second direction, and the third direction are perpendicular to each other, and the first The four directions are the directions from the propeller to the flow guide.

Optionally, the cross-sectional area of the air deflector gradually decreases along the fourth direction from the second end of the air deflector to the first end of the air deflector, and the water inlet The water flow in the cavity flows into the flow guide from the second end, and flows out of the flow guide from the first end.

Optionally, the water flow in the water inlet cavity flows out of the flow guide along the first direction.

Optionally, one end of the extending direction of each guide vane is flush with the edge of the second end of the guide shaft, and the second end of the guide shaft is disposed facing the paddle shaft.

Optionally, along the first direction, a plurality of first water inlets are provided at one end of the housing facing away from the flow guide, and the plurality of first water inlets are arranged at intervals along the circumferential direction; and /Or, the outer surface of the housing is provided with a plurality of second water inlets, and the plurality of second water inlets are arranged at intervals along the circumferential direction.

The present invention also provides a watercraft, including: a carrying part and the electric fin as described in any one of the above, the electric fin is installed on the side of the carrying part facing the water flow.

As above, the present invention provides an electric fin, comprising: a housing extending in a first direction and having a water inlet cavity; a driving member and a propeller arranged in sequence along the first direction, and the driving member is at least partially located in the The water inlet cavity, the driving member is used to drive the propeller to rotate, the propeller is located in the water inlet cavity; the propeller has a propeller shaft and a plurality of blades, the propeller shaft extends along the first direction, A plurality of the paddles are arranged on the paddle shaft along the circumferential direction; along the first direction, the driving member has a first end, the paddle shaft has a second end, and the first end of the paddle shaft The two end portions and the first end portion of the driving member are in clearance fit along the first direction, and the outer contour shape of the cross section of the second end portion is larger than the outer shape of the cross section of the first end portion. The contour shape is the same, and the projections of the second end portion and the first end portion in the first direction coincide; or, the outer contour shape of the cross section of the second end portion of the paddle shaft is compared The outer contour shape of the cross section of the first end portion of the driving member is reduced in proportion.

That is, the paddle shaft and the driving part are smoothly transitioned, there is no step at the connection, and the whole is streamlined. This design prevents the sticky water effect at the connection between the propeller shaft and the driving part, and facilitates the water flow entering the water inlet cavity to gather and squeeze into the center of the water inlet cavity, and accelerate the pressurization and spin into the guide piece to lift the electric fish The power of the fin.

In order to make the above-mentioned content of the present invention more obvious and understandable, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

Description of the drawings

Figure 1 is a perspective view 1 of an electric fin according to an embodiment of the present invention;

Figure 2 is a second perspective view of the electric fin of the present invention;

3 is a three-dimensional view of the electric fin of the embodiment of the present invention;

Figure 4 is a side view of the electric fin of the embodiment of the present invention;

Figure 5 is a top view of an electric fin according to an embodiment of the present invention;

Figure 6 is a cross-sectional view in the direction of A-A in Figure 5;

Fig. 7 is a three-dimensional view four of the electric fin of the embodiment of the present invention;

FIG. 8 is a side view of the propeller in the electric fin of the embodiment of the present invention;

9 is a second side view of the propeller in the electric fin of the embodiment of the present invention;

Fig. 10 is a first perspective view of a guide member in an electric fin of the present invention;

Fig. 11 is a side view of the deflector in the electric fin of the embodiment of the present invention;

Fig. 12 is a second perspective view of the deflector in the electric fin of the embodiment of the present invention;

Figure 13 is a perspective view 1 of a power supply box according to an embodiment of the present invention;

Figure 14 is a top view of a power supply box according to an embodiment of the present invention;

Figure 15 is a cross-sectional view in the direction of A-A in Figure 14;

16 is a second perspective view of the power supply box of the embodiment of the present invention;

Figure 17 is a three-dimensional view of a power supply box according to an embodiment of the present invention;

Figure 18 is a side view of the power supply box of the embodiment of the present invention;

Fig. 19 is a cross-sectional view in the direction of C-C in Fig. 18.

Detailed ways

The following specific specific examples illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of the present invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in combination with the embodiments is to cover other options or modifications that may be extended based on the claims of the invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

1 to 6, the present invention provides an electric fin 1, including: a housing 10 extending in a first direction (shown in the X direction in FIGS. 1, 4 to 6) and having a water inlet cavity 11, Used for water supply flow to enter; the propeller 20 and the deflector 30 arranged in sequence along the first direction, preferably, the propeller 20 and the deflector 30 fit in the first direction; further preferably, the propeller 20 and the deflector The parts 30 are in clearance fit along the first direction, and the gap is relatively small. Preferably, the gap between the propeller 20 and the guide part 30 in the first direction is between 0.5 mm and 2 mm, including 0.5 mm and 2 mm.

The propeller 20 is located in the water inlet cavity 11, the guide member 30 is at least partially located in the water inlet cavity 11, and the water flow in the water inlet cavity 11 flows out of the guide member 30; preferably, along In the first direction, one end of the guide member 30 is located in the water inlet cavity 11, and the other end extends out of the water inlet cavity 11. In this embodiment, the casing 10 is arranged around the propeller 20, that is, the propeller 20 is completely located inside the casing 10; the flow guide 30 is partially located outside the casing 10.

3 and 4, and FIGS. 7-9, the propeller 20 has a propeller shaft 21 and a plurality of blades 22, the propeller shaft 21 extends in the first direction, and the plurality of blades 22 extend along the circumference (Shown in the direction T in Fig. 3) on the paddle shaft 21; referring to Fig. 3, Fig. 10 to Fig. 12, the guide member 30 has a guide shaft 31 and a plurality of guide vanes 32, the The guide shaft 31 extends along the first direction, and a plurality of guide vanes 32 are provided on the guide shaft 31 along the circumferential direction (shown in the T direction in FIG. 3 ).

Referring to Figures 5 and 6, the outer contour (shown by the dashed frame S in Figure 6) enclosed by the paddle shaft 21 and the guide shaft 31 is projected in the second direction (shown in the Y direction in Figure 5) The size in the third direction (shown in the Z direction in FIG. 6) gradually decreases along the fourth direction (shown in the A direction in FIG. 6), and the first direction, the second direction, and the third direction are mutually Vertically, the fourth direction is the direction from the propeller 20 to the guide member 30, that is, the direction in which water flows out of the guide member 30.

That is, the propeller shaft 21 and the guide shaft 31 are designed to be tapered in the fourth direction as a whole, and the size in the third direction gradually decreases; that is, the overall size of the propeller shaft 21 and the guide shaft 31 in the third direction is along the third direction. The four directions show a decreasing trend. With reference to Figure 3, draw a tangent to the outer contour enclosed by the paddle shaft 21 and the guide shaft 31 (shown as P in Figure 3). The tangent shows a downward trend, representing that the paddle shaft 21 and the guide shaft 31 as a whole The size in the third direction gradually decreases.

After this arrangement, on the one hand, due to the provision of the deflector 30, the water flow rotates into the deflector 30 from the water inlet cavity 11 at a high speed, and is guided by the deflector 32, so that the water flows out of the deflector 30 in the first direction. , That is, the water flow in the water inlet cavity 11 flows out of the guide member 30 in the first direction, which realizes the guidance of the high-speed rotating water flow in the water inlet cavity 11, and improves the guidance of the electric fin 1; On the other hand, since the size of the projection of the outer contour of the paddle shaft 21 and the guide shaft 31 in the second direction in the third direction gradually decreases in the fourth direction, the water entering the water inlet cavity 11 The water flow converges and squeezes toward the center of the water inlet chamber 11 (shown by the dashed arrow in Figure 6), and does not spread out. Under the condition of a certain water flow rate, the water flow accelerates and pressurizes and spins into the guide member 30, and accelerates the addition. The pressure flows out from the deflector 30, which plays a role of pressure increase and speed increase, thereby increasing the power of the electric fin 1.

Preferably, the projection is conical. Further preferably, the paddle shaft 21 is in the shape of a truncated cone, and the flow guide shaft 31 is in the shape of a truncated cone; that is, the projection of the paddle shaft 21 in the second direction is in a trapezoidal shape (as shown by the dashed box in FIG. 9), and the flow guide shaft The projection of 31 in the second direction is trapezoidal.

6 and 9, along the first direction, the paddle shaft 21 has a first end 23 and a second end 24, and the first end 23 and the second end 24 are located on opposite sides of the paddle shaft 21. 10 to 12, along the first direction, the guide shaft 31 has a first end 35 and a second end 34, and the first end 35 and the second end 34 are located on opposite sides of the guide shaft 31.

Preferably, the cross-sectional area of the paddle shaft 21 gradually decreases from the second end 24 of the paddle shaft 21 to the first end 23 of the paddle shaft 21 along the fourth direction, and the guide The cross-sectional area of the flow shaft 31 gradually decreases along the fourth direction from the second end 34 of the flow guide shaft 31 to the first end 35 of the flow guide shaft 31. The first end 23 and the second end 34 of the deflector shaft 31 are arranged opposite to each other along the first direction; preferably, the first end 23 of the paddle shaft 21 and the second end 34 The second end 34 of the guide shaft 31 fits along the first direction. Preferably, the cross section of the paddle shaft 21 is circular, and the cross section of the guide shaft 31 is circular.

It is equivalent to that the propeller shaft 21 is designed to be tapered in the fourth direction as a whole, so that the water flow entering the water inlet cavity 11 is collected and squeezed to the center of the water inlet cavity 11 without spreading outward, which is beneficial to the increase of water flow and the pressure increase. Into the deflector 30; the deflector shaft 31 is designed to be tapered in the fourth direction as a whole, so that the water flow in the water inlet cavity 11 is accelerated and pressurized to rotate into the deflector 30, and then converge toward the center of the deflector 30 , Squeeze, do not spread outward, the water flow is further pressurized, and the speed is increased to flow out from the guide 30, thereby enhancing the power of the electric fin 1.

Preferably, the first end 23 of the paddle shaft 21 and the second end 34 of the guide shaft 31 are attached to each other, and the transverse direction of the first end 23 of the paddle shaft 21 is The outer contour shape of the cross section is the same as the outer contour shape of the cross section of the second end 34 of the guide shaft 31, and the first end 23 of the paddle shaft 21 and the guide shaft 31 The projections of the second end 34 along the first direction coincide. That is, referring to Figures 3 and 7, the paddle shaft 21 and the guide shaft 31 are smoothly transitioned, and there is no step at the connection, and the whole is streamlined, which is conducive to the flow of water entering the water inlet cavity 11 to the center of the water inlet cavity 11 to gather and squeeze , Does not spread outwards, and accelerates the pressurized rotation into the guide member 30.

Further preferably, the first end 23 of the paddle shaft 21 and the second end 34 of the guide shaft 31 are in clearance fit; preferably, the first end of the paddle shaft 21 The gap between 23 and the second end 34 of the guide shaft 31 in the first direction is between 0.5 mm and 2 mm, including 0.5 mm and 2 mm. More preferably, the outer contour shape of the cross section of the second end 34 of the guide shaft 31 is equal to the outer contour shape of the cross section of the first end 23 of the paddle shaft 21 In other words, the first end 23 of the paddle shaft 21 and the second end 34 of the flow guide shaft 31 form an integral outer contour of a tapered design.

1-7, the electric fin 1 further includes a driving member 40, the driving member 40, the propeller 20, and the guide member 30 are arranged in sequence along the first direction, and the driving member 40 is at least partially Located in the water inlet cavity 11, the driving member 40 is used to drive the propeller 20 to rotate; preferably, along the first direction, one end of the driving member 40 is located in the water inlet cavity 11 and the other end extends out of the water inlet cavity 11. In this embodiment, the driving member 40 is partially located outside the housing 10. Preferably, the driving member 40 is a motor. The propeller 20 rotates under the driving of the driving member 40 to push the water in the water inlet chamber 11 to flow backward (shown in the direction A in FIG. 6), thereby providing a reverse driving force to drive the watercraft mounted on the electric fin 1 to move forward.

4, along the first direction, the paddle shaft 21 has a second end 24, and the driving member 40 has a first end 41. Referring to FIG. 6 and FIG. 9, the paddle shaft 21 has a second end. The two ends 24 and the first end 41 of the driving member 40 are in clearance fit along the first direction. Preferably, the second end 24 of the paddle shaft 21 and the driving member 40 The gap of the first end 41 in the first direction is between 0.2 mm and 1 mm, including 0.2 mm and 1 mm. The outer contour shape of the cross section of the second end portion 24 of the paddle shaft 21 is the same as the outer contour shape of the cross section of the first end portion 41 of the driving member 40, and the shape of the paddle shaft 21 The projections of the second end 24 and the first end 41 of the driving member 40 in the first direction coincide.

That is, referring to Fig. 3, Fig. 6 and Fig. 7, the paddle shaft 21 and the driving member 40 are smoothly transitioned, there is no step at the joint, and the whole is streamlined. That is, referring to FIG. 6, a tangent line (shown by M in FIG. 6) of the outer contour of the driving member 40 is made, and the tangent line is tangent to the second end 24 of the paddle shaft 21. This design prevents the viscous effect at the connection between the paddle shaft 21 and the driving member 40, and facilitates the water flow entering the water inlet cavity 11 to gather and squeeze into the center of the water inlet cavity 11, and accelerate the pressurization and spin into the guide member 30. Improve the power of electric fins.

If the projection of the second end 24 of the paddle shaft 21 in the first direction is covered by the projection of the first end 41 of the driving member 40 in the first direction, that is, the paddle shaft 21 The cross-sectional area of the second end portion 24 is smaller than the cross-sectional area of the first end portion 41 of the drive member 40, that is, the connection between the paddle shaft 21 and the drive member 40 has a step, which will cause sticky water The effect is not conducive to the water flow entering the water inlet cavity 11 to gather and squeeze into the center of the water inlet cavity 11.

More preferably, the outer contour shape of the cross section of the second end portion 24 of the paddle shaft 21 is reduced in proportion to the outer contour shape of the cross section of the first end portion 41 of the driving member 40 In other words, the second end portion 24 of the paddle shaft 21 and the first end portion 41 of the driving member 40 form an integral outer contour tapered design.

Further preferably, referring to FIGS. 3, 4, 7 and 9, one end of the extending direction of each paddle 22 is flush with the edge of the second end 24 of the paddle shaft 21. That is, one end of the extending direction of each paddle 22 and the first end 41 of the driving member 40 smoothly transition, and the whole is streamlined. With this design, the blade 22 of the propeller 20 can cut more water flow, and further play the role of pressurization and speed increase, making the water flow out of the guide 30 higher and the electric fin 1 more powerful. .

Preferably, the outer contour shape of the cross section of the portion of the driving member 40 located in the water inlet cavity 11 is the same as the outer contour shape of the cross section of the first end 41 of the driving member 40. That is, the part of the driving member 40 located in the water inlet cavity 11 is a body with a constant cross section.

3, 6, 7, and 10 to 12, the flow guide 30 of the present invention has a flow guide cover 33, the flow guide cover 33 is attached to the inner wall of the housing 10, each One end of the deflector 32 is connected with the inner wall of the deflector 33, and the other end is connected with the deflector shaft 31. The projection of the inner wall of the deflector 33 in the second direction (Q in FIG. 6 (Shown) the size in the third direction (shown in the Z direction in FIG. 6) gradually decreases along the fourth direction (shown in the A direction in FIG. 6).

That is, the entire inner wall of the air deflector 33 is designed to be tapered in the fourth direction, and the size in the third direction is gradually reduced; that is, the entire inner wall of the air deflector 33 is reduced in size in the third direction in the fourth direction. Small trend. After this setting, the water flow in the water inlet chamber 11 is converged and squeezed toward the center of the deflector 33 (shown by the dashed arrow in FIG. 6), does not spread outward, and accelerates the pressurization to flow out from the deflector 30. In order to supercharge and increase the speed, the power of the electric fin 1 is improved.

Preferably, the cross-sectional area of the air deflector 33 gradually decreases along the fourth direction from the second end 36 of the air deflector 33 to the first end 37 of the air deflector 33, As shown in FIG. 6, the water flow in the water inlet chamber 11 flows into the guide member 30 from the second end 36, and flows out of the guide member 30 from the first end 37, along the In the first direction, the first end 37 and the second end 36 of the air deflector 33 are located on opposite sides of the air deflector 33. Preferably, the cross section of the deflector 33 is circular.

Preferably, referring to FIGS. 3, 7 and 10, one end of the extension direction of each guide vane 32 is flush with the edge of the second end 34 of the guide shaft 31, and the guide shaft 31 The second end 34 is disposed facing the paddle shaft 21. That is, one end of the extending direction of each guide vane 32 and the paddle shaft 21 smoothly transition. With this design, once the water flow in the water inlet cavity 11 enters the deflector 30, it is separated by the deflector 32 of the deflector 30, which realizes the guidance of the high-speed rotating water flow in the water inlet cavity 11 and further improves Guidance of the electric fin 1.

More preferably, referring to Figs. 3, 7 and 10, the edge of the second end 34 of the deflector shaft 31 is flush with the edge of the second end 36 of the deflector 33. This design is more conducive to realizing the guidance of the high-speed rotating water flow in the water inlet cavity 11, and further improves the guidance of the electric fin 1. Further preferably, the edge of the second end 34 of the deflector shaft 31, the edge of the second end 36 of the deflector 33, and one end in the extending direction of each deflector 32 are aligned. level. Such a design is further conducive to realizing the guidance of the high-speed rotating water flow in the water inlet cavity 11, and further improves the guidance of the electric fin 1.

1, 2, 5 and 7, the outer surface of the housing 10 of the electric fin 1 of the present invention is provided with a plurality of second water inlets 12, and the plurality of second water inlets 12 are along the The circumferential direction (shown in the direction T in FIG. 1) is arranged at intervals; along the first direction, a plurality of first water inlets 13 are provided at one end of the housing 10 facing away from the guide member 30, and a plurality of The first water inlets 13 are arranged at intervals along the circumferential direction. The water flow enters the water inlet cavity 11 from the first water inlet 13 to increase the water inlet volume and generate forward suction (shown in the direction A in Fig. 6) to ensure that the water inlet cavity 11 has sufficient water inlet volume and generate greater thrust , The electric fin 1 is more powerful.

Preferably, the outer surface of the housing 10 of the electric fin 1 of the present invention is provided with a plurality of second water inlets 12, and the plurality of second water inlets 12 are along the circumferential direction (in the direction T in FIG. Show) Interval setting. Alternatively, along the first direction, the housing 10 is provided with a plurality of first water inlets 13 at an end facing away from the air guide 30, and the plurality of first water inlets 13 are arranged at intervals along the circumferential direction .

Further preferably, the housing 10 is arranged around the driving part 40, the driving part 40 extends out of the housing 10 in the first direction, and the plurality of first water inlets 13 are arranged around the driving part 40.

The present invention also provides a watercraft, comprising: a carrying part (not shown in the figure) and the electric fin 1 according to any one of the above embodiments, the electric fin 1 is installed on the side of the carrying part facing the water flow . The electric fin 1 can be applied to a variety of watercraft. Accordingly, the carrying part can be a surfboard, a SUP, an inflatable boat, and so on. Specifically, the electric fin 1 is connected to the carrying part through the mounting base 50, and preferably, the mounting base 50 is detachably connected to the carrying part. After the driving part 40 of the electric fin 1 is connected to the power supply box 1a (as shown in FIG. 13) through the power cord 60, power is supplied to the driving part 40 through the power supply box 1a, which can drive the electric fin 1 to work, thereby driving the movement of the watercraft .

Referring to Figures 13 to 19, the present invention provides a power supply box 1a. Preferably, the power supply box 1a is electrically connected to an electric fin 1 on a watercraft through a power cord 60 to drive the electric fin 1 to work. The watercraft includes surfing. Board, SUP or inflatable boat, etc. The power supply box 1a includes a housing 100, a connector 500 is provided on the housing 100, one end of the power cord 60 is connected to the electric fin 1, and the other end is connected to the connector 500.

The housing 100 is provided with a power supply 600; a power switch 200 is provided on the outer surface of the housing 100 and is movably connected to the housing 100; a sensing element 110 is provided on the housing 100, the sensing element 110 Connected to the power supply 600. When the sensing element 110 senses that the power switch 200 is connected to the housing 100, the power supply 600 supplies power to an external device. Preferably, the external device is an electric fin 1; When the sensing element 110 senses that the power switch 200 is separated from the housing 100, the power supply 600 cuts off power to external equipment.

Preferably, the power switch 200 is provided with a safety rope 300, one end of the safety rope 300 is connected to the user, and the other end is connected to the power switch 200. Preferably, the safety rope 300 is tied to the ankle of the user.

Specifically, when the user is doing water sports, the user connects the power box 1a to the electric fin 1 through the power cord 60, and connects the user to the power switch 200 through the safety rope 300. The power switch 200 is connected to the housing 100, and the sensing element 110 senses that the power switch 200 is connected to the housing 100. At this time, the power supply 600 supplies power to the electric fin 1 (external equipment), and the watercraft works normally.

16 and 17, if the user accidentally falls into the water, because the power switch 200 is connected to the user through the safety rope 300, after the user falls into the water, the user will pull the power switch 200 away from the housing 100 of the power box 1a through the safety rope 300 , The power switch 200 is separated from the housing 100, the sensing element 110 senses that the power switch 200 is separated from the housing 100, the power supply 600 cuts off the electric fin 1, and the watercraft stops working and does not leave the user far away. Therefore, the user can continue to return to the watercraft, which improves the safety of using the power supply box 1a of the present invention.

Continuing to refer to FIG. 15, the sensing element 110 is a magnetically controlled switch, and the power switch 200 is provided with a magnetic element 210 and a magnetic element 2100; when the power switch 200 is connected to the housing 100, the magnetic The component 210 is connected to the magnetic control switch, the induction component 110 senses that the power switch 200 is connected to the housing 100, the magnetic control switch is in an on state, and the power supply 600 supplies power to external devices.

When the power switch 200 is separated from the housing 100, the magnetic attraction member 210 is disconnected from the magnetic control switch, and the sensing member 110 senses that the power switch 200 is separated from the housing 100, so The magnetic control switch is in the off state, and the power supply 600 cuts off power to external devices. That is, in the present invention, through the cooperation of the magnetic control switch and the magnetic attraction member 210, the magnetic control switch senses whether there is the magnetic attraction member 210, so as to realize the power supply or power-off of the power supply 600 to external equipment.

It should be noted that the sensing element 110 is not limited to being a magnetic control switch, and it can be realized whether the power switch 200 is connected to the housing 100 or not. Preferably, the sensing element 110 is a Hall switch.

Preferably, the magnetic control switch is arranged in the housing 100, and a magnetic sensor 130 is further provided in the housing 100. When the power switch 200 is connected to the housing 100, the magnetic sensor 130 is magnetically connected to the magnetic attraction member 210, and the magnetic sensor member 130 can transmit the magnetic force of the magnetic attraction member 210 to the magnetic control switch. By providing the magnetic sensor 130, on the one hand, the enhanced sensor 110 senses whether the power switch 200 is connected to the housing 100; on the other hand, because the magnetic sensor 130 is magnetically connected to the magnetic attraction member 210, the power switch 200 is realized The movable connection with the housing 100.

Preferably, the magnetic sensor 130 is an iron sheet, and the magnetic attraction 210 is a magnet. The movable connection is realized by the magnetic attraction between the magnet and the iron sheet.

15, preferably, the magnetic attraction member 210 is located in the power switch 200, the magnetic sensor member 130 is at least partially attached to the surface of the housing 100 facing away from the power switch 200, and the magnetic attraction member 210 is at least Part of it is attached to the surface of the power switch 200 that faces away from the housing 100. However, the arrangement form of the magnetic attraction element 210 and the magnetic force sensing element 130 is not limited to this, and the following conditions can be met: when the power switch 200 is connected to the housing 100, the magnetic force sensing element 130 and the magnetic attraction element 210 is magnetically connected, and the magnetic sensor 130 can transmit the magnetic force of the magnetic attraction member 210 to the magnetic control switch.

Referring to FIGS. 16 and 17, the outer surface of the housing 100 is provided with a receiving portion 400 for receiving the power switch 200. Preferably, after the power switch 200 is accommodated in the accommodating part 400 on the outer surface of the housing 100, referring to FIG. 13, the power switch 200 is flush with the accommodated outer surface. The shape of the receiving part 400 is not limited. Preferably, the receiving part 400 is cylindrical, and accordingly, the power switch 200 is cylindrical. Further preferably, the receiving portion 400 is provided on one surface of the housing 100, and the receiving portion 400 is formed by opening a gap on the side surface, that is, the receiving portion 400 includes three side walls connected in sequence, and The bottom wall connected by the three side walls; the power switch 200 has a rectangular parallelepiped shape to cooperate with the receiving part 400.

It should be noted that the movable connection mode of the power switch 200 and the housing 100 is not limited. As described above, the power switch 200 is magnetically connected to the housing 100 to realize the movable connection between the power switch 200 and the housing 100. Further preferably, referring to FIG. 16 and FIG. 17, the power switch 200 can be clamped with the accommodating part 400, and the power switch 200 can be separated from the accommodating part 400 under external force. In other words, the power switch 200 is clamped to the housing 100 to realize the movable connection between the power switch 200 and the housing 100. The user can pull the power switch 200 away from the housing 100 by pulling the safety rope 300.

Specifically, one of the side walls of the accommodating portion 400 and the side wall of the power switch 200 is provided with a groove 420, and the other is provided with a convex portion 410, the convex portion 410 and the groove 420 Card access. In this embodiment, a convex portion 410 is provided on the side wall of the accommodating portion 400, a groove 420 is provided on the side wall of the power switch 200, and the convex portion 410 is clamped with the groove 420; in other embodiments Wherein, a groove 420 is provided on the side wall of the accommodating part 400, and the side wall of the power switch 200 is provided with a convex part 410, and the convex part 410 is clamped with the groove 420. 16 and FIG. 17, in this embodiment, two opposite side walls of the accommodating portion 400 are respectively provided with convex portions 410, and two opposite side walls of the power switch 200 are respectively provided with grooves 420.

Continuing to refer to FIG. 15, the housing 100 is provided with a circuit board 120, the sensing element 110 is provided on the circuit board 120 and connected to the circuit board 120, and the power supply 600 is connected to the circuit board 120.

In summary, the above-mentioned embodiments provided by the present invention only exemplarily illustrate the principles and effects of the present invention, and are not used to limit the present invention. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims

An electric fin, characterized in that it comprises:

The casing extends along the first direction and has a water inlet cavity;

A driving member and a propeller arranged in sequence along the first direction, the driving member is at least partially located in the water inlet cavity, the driving member is used to drive the propeller to rotate, and the propeller is located in the water inlet cavity;

The propeller has a propeller shaft and a plurality of blades, the propeller shaft extends along the first direction, and the plurality of blades are provided on the propeller shaft along the circumferential direction;

Along the first direction, the driving member has a first end, the paddle shaft has a second end, the second end of the paddle shaft and the first end of the driving member With clearance fit along the first direction, the outer contour shape of the cross section of the second end is the same as the outer contour shape of the cross section of the first end, and the second end and the first end The projections of one end portion along the first direction coincide; or, the outer contour shape of the cross section of the second end portion of the paddle shaft is compared with the cross section of the first end portion of the driving member The outer contour shape is reduced proportionally.
The electric fin of claim 1, wherein the paddle shaft is in the shape of a truncated cone.
The electric fin of claim 1, wherein the cross-sectional area of the propeller shaft is from the second end of the propeller shaft to the propeller shaft from the driving member to the direction of the propeller. The first end portion of the paddle shaft gradually decreases, and along the first direction, the first end portion and the second end portion of the paddle shaft are located on opposite sides of the paddle shaft.
The electric fin of claim 1, wherein one end of each of the paddles in the extending direction is flush with the edge of the second end.
The electric fin according to claim 1, wherein the outer contour shape of the cross section of the portion of the driving member located in the water inlet cavity is the same as the outer contour shape of the cross section of the first end portion .
The electric fish fin according to claim 1, further comprising a deflector, the driving part, the propeller and the deflector are arranged in sequence along the first direction, and the deflector is at least Partly located in the water inlet cavity, and the water flow in the water inlet cavity flows out of the guide member;

The deflector has a deflector, a deflector shaft and a plurality of deflectors, the deflector shaft extends along the first direction, and the plural deflectors are arranged on the deflector along the circumferential direction. Shaft, the flow guide is attached to the inner wall of the housing, one end of each flow guide is connected to the inner wall of the flow guide, and the other end is connected to the flow guide shaft;

The size of the projection of the inner wall of the air deflector along the second direction in the third direction gradually decreases along the fourth direction. The first direction, the second direction, and the third direction are perpendicular to each other, and the first The four directions are the directions from the propeller to the flow guide.
The electric fin according to claim 6, wherein the cross-sectional area of the flow deflector extends from the second end of the flow deflector to the first end of the flow deflector along the The fourth direction is gradually reduced, and the water flow in the water inlet cavity flows into the flow guide from the second end, and flows out of the flow guide from the first end.
8. The electric fin according to claim 7, wherein the water flow in the water inlet cavity flows out of the guide member along the first direction.
The electric fin according to claim 7, wherein one end of the extension direction of each of the guide vanes is flush with the edge of the second end of the guide shaft, and the second end of the guide shaft The end faces the paddle shaft.
The electric fin according to claim 6, characterized in that, along the first direction, a plurality of first water inlets are provided on the end of the housing facing away from the guide member, and a plurality of the first The water inlets are arranged at intervals along the circumferential direction; and/or, the outer surface of the housing is provided with a plurality of second water inlets, and the plurality of second water inlets are arranged at intervals along the circumferential direction.
A watercraft, characterized by comprising: a carrying part and the electric fin according to any one of claims 1 to 10, the electric fin being installed on the side of the carrying part facing the water flow.