CN211885252U

CN211885252U - Power-assisted flipper and diving shoe

Info

Publication number: CN211885252U
Application number: CN202020278314.9U
Authority: CN
Inventors: 李相润
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-11-10
Anticipated expiration: 2030-03-09

Abstract

A kind of helping hand flipper, including the flipper, can be connected with the foot cover separately the permanent seat each other, its flipper front end is fixed and mounted in the flipper socket of the permanent seat, and make the flipper front end bend and form the curved surface portion; the curved surface part is folded from front to back in the longitudinal direction, and the central angle of the front end of the curved surface part is not more than 30 degrees; the longitudinal length of the curved surface part is not more than half of the longitudinal length of the flipper and is 0.8-2.5 times of the chord length of the front end of the curved surface part; and a pair of flexible flipper support bars which extend from front to back and enclose the two sides of the flipper are fixedly arranged on the two sides of the fixed seat. The design can improve the longitudinal flexibility of the whole flipper, and realize the improvement of the bending strength and the deformation resetting effect of the flipper; through using locking device to lock the diving shoes that formation each other with helping hand fin and podotheca detachably, can provide the helping hand for user's play hydrodynamic action, outside being more convenient for improve its swimming speed efficiency, can change different helping hand fins according to the needs that the user is different.

Description

Power-assisted flipper and diving shoe

Technical Field

The utility model relates to a diving equipment field especially relates to a helping hand fin to and have diving shoes of this helping hand fin.

Background

The diving shoes are indispensable equipment in people diving sports, particularly submarine diving. The diving shoes generally consist of foot sleeves and flippers, wherein a user wears the foot sleeves on feet and drives the flippers to swing in water through thighs so as to achieve the purpose of advancing in water, and the flippers with different lengths can be worn according to different thigh forces. For users who have mastered certain swimming skills, the diving shoes which can improve the efficiency are more willing to be adopted so as to improve the swimming speed efficiency under the same water kicking operating frequency.

The inventor discloses in the utility model patent of ZL201721063016.2 that 5 month 1 of 2018 was approved, firm in connection's diving shoes is disclosed, it includes podotheca and fin, the tail end of podotheca is equipped with at least one and is used for the chamber that holds of wearing, the podotheca both sides are equipped with the flexible fin support bar that extends forward respectively, the podotheca front end forms accommodation space with two flexible fin support bars, diving shoes still includes two buckles and at least one locking device, the fin is located the accommodation space and connects the podotheca front end through locking device, each buckle is blocked respectively into each flexible fin support bar front end, fix the fin on the podotheca.

The utility model discloses an useful part lies in: the structure is simple, and different flippers can be replaced according to different requirements of users; the flipper and the foot sleeve are connected through the locking device and the buckles, a triangle is formed between the locking device and the two buckles, the connecting structure is reasonable and firm, the assembly and disassembly are convenient, the stability is good, the phenomenon that the flipper falls off is not easy to occur when the flipper is in a locking state, the swimming technique can be better improved for a user, and therefore the swimmer is more suitable for beginners or users who master certain swimming skills to use. For users with certain swimming skills, the structure improvement of the diving shoes improves the bending strength and deformation resetting effect of the flippers, and can realize the up-and-down deformation swinging of the flippers with larger amplitude under the same thigh swinging action amplitude, thereby providing higher swimming speed efficiency and further meeting the aim of pursuing faster and stronger training and competition of the users.

Disclosure of Invention

An object of the utility model is to provide a helping hand web, it can improve the holistic vertical tough elasticity of web, realizes improving web bending strength and deformation effect that resets to can provide the helping hand for user's play hydrodynamic work, be more convenient for improve its swimming speed efficiency.

In order to achieve the above purpose, the utility model adopts the following technical means to implement:

a kind of helping hand flipper, including the flipper, can be connected with the foot cover separately the permanent seat each other, its flipper front end is fixed and mounted in the flipper socket of the permanent seat, and make the flipper front end bend and form the curved surface portion; the curved surface part is folded from front to back in the longitudinal direction, and the central angle of the front end of the curved surface part is not more than 30 degrees; the longitudinal length of the curved surface part is not more than half of the longitudinal length of the flipper and is 0.8-2.5 times of the chord length of the front end of the curved surface part; and a pair of flexible flipper support bars which extend from front to back and enclose the two sides of the flipper are fixedly arranged on the two sides of the fixed seat.

Further, the chord length of the front end of the curved surface part is 95-160mm or 190-320 mm.

Furthermore, the arch height of the front end of the curved surface part is 0.5-8mm, and the central angle of the front end of the curved surface part is 2-25 degrees.

Furthermore, the flexible flipper support bar is in a T-shaped strip shape, the inner side of the flexible flipper support bar is used for enclosing the two sides of the flipper from front to back through the clamping groove, and the outer side of the flexible flipper support bar is provided with a structural reinforcing bar extending from front to back.

Furthermore, the front end of the flexible flipper support bar is fixedly arranged in a flexible flipper support bar jack of the fixed seat.

Further, the material of the flipper is one of carbon fiber and glass fiber.

Furthermore, the material of the flexible flipper support bar is one of silica gel, EPDM, TPU and chloroprene rubber.

Another object of the utility model is to provide a diving shoe with this helping hand flipper can change different helping hand flippers according to the needs that the user is different, and then realizes rational in infrastructure, firm, makes things convenient for the dismouting, and the effect that stability is good makes the phenomenon that the flipper drops be difficult to take place when shoe cover, helping hand flipper are in the closure state.

A diving shoe with the power-assisted flipper further comprises a foot sleeve, and the power-assisted flipper is detachably locked with the foot sleeve through a locking device.

Further, locking device includes retaining member and at least one screw, the retaining member is opened there is the screw hole post that can mutually support with the screw, podotheca, fixing base be equipped with respectively with screw hole post is mated through-hole, when locking device locks fixing base and podotheca front end, the retaining member is located podotheca sole upper end, the screw passes behind the through-hole of fixing base and the through-hole of podotheca respectively and locks each other with the screw hole post.

Furthermore, the locking device also comprises a backing plate, and the backing plate is provided with a nail groove; the foot sleeve, the foot web and the fixed seat are respectively provided with a through hole matched with the threaded hole column; when the locking device locks the fixing seat, the front end of the flipper and the front end of the foot sleeve, the backing plate is positioned at the lower end of the sole of the foot sleeve, and the screws respectively penetrate through the nail groove of the backing plate, the through hole of the fixing seat, the through hole of the flipper and the through hole of the foot sleeve and then are locked with the threaded hole column.

The utility model discloses at least, have following useful part:

1. the utility model discloses the helping hand web of making, its simple structure, for other present flat web of the same material, this setting makes the curved surface portion that web front end bending formed, for the present design web of foot does not have obvious cost increase, and can improve the holistic longitudinal flexibility of web of foot, realize improving web bending strength and deformation reset effect to can provide the helping hand for user's play hydrodynamic action, be more convenient for improve its swimming speed efficiency, let the user under equal physical stamina state, can obtain the speed and the swimming distance that further improve swimming; in addition, the bending amplitude of the curved surface part can be reasonably adjusted, so that the reasonable amplitude change of the longitudinal toughness and elasticity of the whole flipper is realized, and the equipment selection of different purposes of swimming skill of different users, daily common training, high-strength competition and the like is met; simultaneously, this setting scheme can carry out the formula of cooperateing design, combination according to present most detachable dive shoes, has good commonality.

2. The diving shoes made by the utility model have simple structure, and can reasonably select the design of single-foot web type or double-foot web type according to the hobby of users; the power-assisted flipper has good replaceability, different power-assisted flippers can be replaced selectively according to different requirements of users, and the power-assisted flipper can be detached and replaced when damaged; compared with the existing design, the power-assisted flipper used by the diving shoe has sufficient integral longitudinal flexibility, and a flipper frame is not required to be arranged on the foot sleeve to assist in fixing and supporting the flipper, so that the integral weight reduction effect of the diving shoe can be realized.

Drawings

Fig. 1 is a schematic view showing a combined state of a diving shoe having the power assisted flipper of example 1;

FIG. 2 is a schematic structural view of a diving shoe having the power assisted flipper of example 1;

fig. 3 is a schematic sectional view of the front half of the power assist fin of example 1;

fig. 4 is a schematic sectional view of the rear half of the power assist fin of example 1;

FIG. 5 is a schematic view showing a combined state of the diving shoe having the power-assisted flipper according to the embodiment 2;

FIG. 6 is a schematic structural view of a diving shoe having the power-assisted flipper of embodiment 2;

fig. 7 is a schematic sectional view of the front half of the power-assisted flipper of embodiment 2;

fig. 8 is a schematic sectional view of the rear half of the power assisted flipper of embodiment 2.

Detailed Description

The invention is further illustrated by the following specific examples.

Example 1

As shown in fig. 1-4, the present embodiment shows a diving shoe of the type having two flippers 1, which comprises a power-assisted flipper, a holder 2 detachably interconnected with a foot cover 3, wherein the power-assisted flipper used is of the type:

scheme A: a strip-shaped flat plate made of carbon fiber and with a furled front end is used as a flipper 1, the front end of the flipper 1 is fixedly arranged in a flipper inserting opening 21 of a fixed seat 2 in an adhesive or buckling mode, so that the front end of the flipper 1 is bent along the flipper inserting opening 21 to form an upwards convex curved surface part 11, in the embodiment, a section illustrated in figure 3 is formed by cutting along a cutting line A-A, the front end chord length X of the curved surface part 11 formed by bending is 111.6mm, the front end arch height h of the curved surface part 11 is 5mm, and the front end central angle alpha of the curved surface part 11 is 20 degrees; and the cross section as shown in fig. 4 is formed by cutting along the cutting line B-B, it can be seen that the curved surface portion 11 formed at the front end of the fin 1 is folded from front to back in the longitudinal direction and the rear end of the fin 1 is restored to the flat shape by the bending process; the longitudinal length a of the curved surface portion 11 is about 25% of the longitudinal length b of the fin 1, and the longitudinal length a of the curved surface portion 11 is 1.3 times of the chord length of the front end of the curved surface portion 11;

a pair of flexible flipper support bars 3 made of silica gel materials, which extend from front to back and enclose the two sides of the flipper 1, are fixedly arranged on the two sides of the fixed seat 2, and the flexible flipper support bars 3 are integrally in a T-shaped strip shape; the inner side of the flexible flipper support strip 3 is coated on the two sides of the flipper 1 from front to back through the clamping groove 31, and the outer side is provided with a structural reinforcing strip 32 extending from front to back.

The arrangement of the flexible flipper support bars 3 can prevent the flaky flipper 1 from contacting with foreign objects to scratch the human body; and through the arrangement of the structure strengthening strip 32, certain longitudinal flexibility can be added to the outer part of the fin 1, so that the bending strength and the deformation resetting effect of the fin 1 are improved.

The helping hand web of above-mentioned scheme A structure, it can effectively improve the holistic vertical elasticity of web 1, use the equivalent material, the flat ordinary web 1 of the no curved surface portion 11 under the equivalent structure compares for the contrast scheme, with upwards bending 180 degrees, 180 degrees bend downwards and test, this scheme is for the contrast scheme, the reset force that vertical elasticity provided when single web upwards bends with 180 degrees has promoted 5.5%, the reset force that vertical elasticity provided when bending downwards with 180 degrees has promoted 4.8%, this setting scheme is more suitable for possessing medium swimming skill user, use with training or speed type, endurance type competition as the purpose.

Scheme B: the method is characterized in that a strip-shaped flat plate made of glass fiber and with a furled front end is used as a flipper 1, the front end of the flipper 1 is inserted, fixed and installed in a flipper inserting opening 21 of a fixed seat 2, so that the front end of the flipper 1 is bent along the flipper inserting opening 21 to form an upwards convex curved surface part 11, in the embodiment, cutting is carried out along a cutting line A-A to form a section as illustrated in figure 3, the chord length X of the front end of the curved surface part 11 formed by bending is 95mm, the arch height h of the front end of the curved surface part 11 is 0.5mm, and the central angle alpha of the front end of the curved surface part 11 is 2 degrees; and the cross section as shown in fig. 4 is formed by cutting along the cutting line B-B, it can be seen that the curved surface portion 11 formed at the front end of the fin 1 is folded from front to back in the longitudinal direction and the rear end of the fin 1 is restored to the flat shape by the bending process; the longitudinal length a of the curved surface portion 11 is about 20.2% of the longitudinal length b of the fin 1, and the longitudinal length a of the curved surface portion 11 is 0.97 times the chord length of the front end of the curved surface portion 11;

a pair of chloroprene rubber flexible flipper support bars 3 which extend from front to back and enclose the two sides of the flipper 1 are fixedly arranged on the two sides of the fixed seat 2, and the flexible flipper support bars 3 are integrally in a T-shaped strip shape; the inner side of the flexible flipper support strip 3 is coated on the two sides of the flipper 1 from front to back through the clamping groove 31, and the outer side is provided with a structural reinforcing strip 32 extending from front to back.

The power-assisted flipper with the structure of the scheme B can effectively improve the overall longitudinal flexibility of the flipper 1, the flat plate type common flipper 1 without the curved surface part 11 and made of the same material and made of the same structure is used as a comparison scheme for comparison, and the test is carried out by upward bending at 180 degrees and downward bending at 180 degrees, compared with the comparison scheme, the reset force provided by the longitudinal flexibility when a single flipper is bent upward at 180 degrees is improved by 1.1 percent, and the reset force provided by the longitudinal flexibility when the flipper is bent downward at 180 degrees is improved by 0.8 percent, the arrangement scheme is more suitable for children users, the flipper 1 does not need to be deformed and swung by larger thigh force in the swimming or diving process, and compared with the diving shoes of the practical novel patent scheme of ZL201721063016.2, the power-assisted flipper 1 has similar bending strength and deformation reset effect, and simultaneously reduces the structure of the flipper frame to obtain the weight reduction effect, therefore, under the same physical ability state, the user can experience the light feeling during swimming.

The power-assisted flippers of the proposal A or the proposal B and the foot sleeves 3 are detachably locked with each other in a one-to-one correspondence way through the locking devices, thus forming the double-flipper 1 type diving shoe shown in figures 1-2. Specifically, locking device includes retaining member 31, screw 32, backing plate 33, and retaining member 31 is opened has the screw hole post 311 that can mutually support with screw 32, podotheca 3, flipper 1 front end, fixing base 2 are equipped with the through-hole respectively, and backing plate 33 is equipped with the nail groove to podotheca 3 sole upper end is provided with and is used for retaining member 31 to insert the installation position 34 of installation.

When the locking device locks the front ends of the fixed seat 2 and the foot sleeve 3, the locking piece 31 is inserted into the mounting position 34 of the foot sleeve 3, so that the threaded hole column 311 of the locking piece 31 is matched and inserted with the foot sleeve 3, the front end of the flipper 1 and the through hole of the fixed seat 2; then, the backing plates 33 are arranged at the lower end of the fixed seat 2 in a matching way, the screws 32 respectively pass through the nail grooves of the backing plates 33, the through holes of the fixed seat 2, the through holes at the front end of the flipper 1 and the through holes of the foot sleeves 3 and then are locked in the locking parts 31, and the locking parts 31 with smaller volume can be prevented from being driven to deflect in the screwing-in process of the screws 32 by the arrangement of the mounting positions 34; and, through the setting of backing plate 33, behind the screw 32 locking in retaining member 31, its screw cap is hidden in backing plate 33, avoids the emergence that the screw 32 scratches the human body or catches the plant in the aquatic and causes the dangerous accident when using diving shoes.

Example 2

As shown in fig. 5-8, the present embodiment shows a diving shoe of the type having a single fin 1' comprising a power fin, a holder 2' detachably interconnected with a foot cover 3', wherein the power fin is used in the following way:

scheme A: the carbon fiber flat plate which expands outwards from the front end to the rear end and is in a trapezoid sheet shape integrally is used as a flipper 1', two ends and a central part are formed at the rear end of the flipper 1' to form a protrusion, a wave-shaped structure 12 'with a sunken transition section between the middle part and the two ends is manufactured, the front end of the flipper 1' is fixedly arranged in a flipper inserting opening 21 'of a fixed seat 2' in an adhesive or buckling mode, the front end of the flipper 1 'is bent along the flipper inserting opening 21' to form a curved surface part 11 'which protrudes downwards, in the embodiment, cutting is carried out along a cutting line A' -A 'to form a section as illustrated in fig. 7, the chord length X' at the front end of the curved surface part 11 'formed by bending is 252.5mm, the arch height h' at the front end of the curved surface part 11 'is 8mm, and the central angle alpha' at the front end of the curved surface. And a cross section as illustrated in fig. 8 is formed by cutting along a cutting line B ' -B ', and it is understood that the curved surface portion 11' formed at the front end of the fin 1' is folded in a longitudinal direction from front to back by the bending process, and the rear end of the fin 1' is restored to a planar shape; the longitudinal length a ' of the curved surface portion 11' is about 41% of the longitudinal length b ' of the fin 1', and the longitudinal length a ' of the curved surface portion 11' is 1.05 times the chord length of the front end of the curved surface portion 11 ';

a pair of flexible flipper support bars 3' made of EDPM materials, which extend from front to back and enclose the two sides of the flipper 1', are fixedly arranged on the two sides of the fixed seat 2', the whole flexible flipper support bar 3' is in a T-shaped strip shape, and the front ends of the flexible flipper support bars 3' are fixedly arranged in the flexible flipper support bar inserting ports 31' of the fixed seat 2 '; the inner side of the flexible flipper support bar 3 'is incompletely wrapped from front to back on the two sides of the flipper 1' by inserting the groove, so that the protruding parts at the two ends of the rear end of the flipper 1 'are exposed out of the flexible flipper support bar 3', and the outer side of the flexible flipper support bar 3 'is provided with a structure strengthening bar 32' extending from front to back.

The arrangement of the flexible flipper support strip 3 'can prevent the flaky flipper 1' from contacting with foreign objects to scratch the human body; and through the arrangement of the structure strengthening strip 32', certain longitudinal flexibility can be added to the outer part of the fin 1', especially two sides of the trapezoidal flaky fin 1', so that the bending strength and the deformation resetting effect of the fin 1' are improved.

The helping hand fin of above-mentioned scheme A structure, it can effectively improve the holistic vertical elasticity of fin 1', use the same material, the flat ordinary fin 1' of no curved surface portion 11' under the same structure compares as the contrast scheme, with upwards bending 180 degrees, 180 degrees bend down and test, this scheme is for the contrast scheme, the reset force that vertical elasticity of toughness provided when upwards bending 180 degrees promoted 13%, the reset force that vertical elasticity of toughness provided when downwards bending 180 degrees promoted 14.2%, this setting scheme is more suitable for possessing medium swimming skill user, use with training or speed athletic mesh.

Scheme B: a flat plate made of glass fiber material which expands outwards from the front end to the rear end and is in a trapezoid sheet shape integrally is used as a fin 1', two ends and the middle part of the back end of the fin 1' are made to form bulges, a wave-shaped structure 12' with a sunken transition section between the middle part and the two ends is manufactured, the front end of the fin 1' is inserted and fixedly installed in a fin inserting opening 21' of a fixed seat 2', the front end of the fin 1' is bent along the fin inserting opening 21' to form a curved surface part 11' which protrudes downwards, in the embodiment, cutting is performed along a cutting line A ' -A ' to form a section as illustrated in figure 8, the front end chord length X ' of the curved surface part 11' formed by bending is 202.2mm, the front end arch height h ' of the curved surface part 11' is 3.5mm, and the front end central angle alpha ' of the curved surface part 11' is 8 degrees. And a cross section as illustrated in fig. 8 is formed by cutting along a cutting line B ' -B ', and it is understood that the curved surface portion 11' formed at the front end of the fin 1' is folded in a longitudinal direction from front to back by the bending process, and the rear end of the fin 1' is restored to a planar shape; the longitudinal length a ' of the curved surface portion 11' is about 38% of the longitudinal length b ' of the fin 1', and the longitudinal length a ' of the curved surface portion 11' is 0.97 times the chord length of the front end of the curved surface portion 11 ';

a pair of TPU flexible flipper support bars 3' extending from front to back and enclosing the two sides of the flipper 1' are fixedly arranged on the two sides of the fixed seat 2', the flexible flipper support bars 3' are integrally in a T-shaped strip shape, and the front ends of the flexible flipper support bars 3' are fixedly arranged in the flexible flipper support bar sockets 31' of the fixed seat 2 '; the inner side of the flexible flipper support bar 3 'is incompletely wrapped from front to back on the two sides of the flipper 1' by inserting the groove, so that the protruding parts at the two ends of the rear end of the flipper 1 'are exposed out of the flexible flipper support bar 3', and the outer side of the flexible flipper support bar 3 'is provided with a structure strengthening bar 32' extending from front to back.

The power-assisted flipper with the structure of scheme B can effectively improve the longitudinal flexibility of the whole flipper 1', and compared with a flat plate type common flipper 1' without the curved surface part 11 'made of the same material and in the same structure by taking a contrast scheme as well as a test by bending upwards at 180 degrees and bending downwards at 180 degrees, compared with the contrast scheme, the reset force provided by the longitudinal flexibility when bending upwards at 180 degrees is improved by 5.9 percent and the reset force provided by the longitudinal flexibility when bending downwards at 180 degrees is improved by 6.2 percent, compared with the contrast scheme, the arrangement scheme is more suitable for elementary swimming fin users, the flipper 1' does not need to deform and swing by larger thigh force in the swimming or diving process, and compared with the diving shoe of the utility model patent scheme of ZL201721063016.2, the power-assisted flipper 1 'structure is reduced, and the weight reduction effect is obtained by reducing the structure of the flipper 1' frame, the arrangement scheme is more suitable for the purposes of training the coordination of the two legs and training endurance.

The power-assisted flipper of the solution A or the solution B and the two foot sleeves 3 'are detachably locked with each other by the locking device to form the diving shoe of the single flipper 1' type as shown in Figs. 5-6. Specifically, the locking device comprises a locking member 31', a backing plate 33' and screws 32', and is additionally provided with a foot sleeve fixing plate 35' for fixing two foot sleeves 3', the foot sleeve fixing plate 35' and the locking member 31' are respectively provided with a threaded hole column 311' capable of being matched with the screws 32', the foot sleeves 3', the front ends of the foot webs 1' and the fixing seats 2' are respectively provided with a through hole, the backing plate 33' and the foot sleeve fixing plate 35' are provided with a screw groove, and the upper end of the sole of each foot sleeve 3' is provided with a mounting position 34' for inserting and mounting the locking member 31 '.

When the locking device locks the front ends of the fixed seat 2 'and the foot sleeves 3', the two foot sleeves 3 'are firstly closed, the foot sleeve fixing plate 35' and the two foot sleeves 3 'are aligned and spliced, and the foot sleeve fixing plate 35' and the two foot sleeves 3 'are locked by the screws 32' to form a mutually fixed structure; then the locking piece 31 'is inserted into the mounting position 34' of the foot sleeve 3 'to ensure that the threaded hole column 311' of the locking piece 31 'is matched and inserted with the foot sleeve 3', the front end of the flipper 1 'and the through hole of the fixed seat 2'; then, the backing plates 33 'are arranged at the lower end of the fixed seat 2' in a matching way, the screws 32 'respectively pass through the nail grooves of the backing plates 33', the through holes of the fixed seat 2', the through holes at the front end of the flippers 1' and the through holes of the foot sleeves 3 'and then are locked in the locking parts 31', and the locking parts 31 'with smaller volume can be prevented from being driven to deflect in the screwing-in process of the screws 32' in the locking process of the screws 32 'through the arrangement of the mounting positions 34'; and, through the setting of backing plate 33', behind screw 32' locking retaining member 31', its screw cap is hidden in backing plate 33', avoids using the emergence that the screw 32' scratches the human body or catches the plant in the aquatic and causes the dangerous accident when diving shoes.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a helping hand fin, includes fin, can with the detachable interconnect's of podotheca fixing base which characterized in that: the front end of the flipper is fixedly arranged in the flipper jack of the fixed seat, and the front end of the flipper is bent to form a curved surface part; the curved surface part is folded from front to back in the longitudinal direction, and the central angle of the front end of the curved surface part is not more than 30 degrees; the longitudinal length of the curved surface part is not more than half of the longitudinal length of the flipper and is 0.8-2.5 times of the chord length of the front end of the curved surface part; and a pair of flexible flipper support bars which extend from front to back and enclose the two sides of the flipper are fixedly arranged on the two sides of the fixed seat.

2. An assistive fin as set forth in claim 1, wherein: the chord length of the front end of the curved surface part is 95-160mm or 190-320 mm.

3. An assistive fin as set forth in claim 1, wherein: the arch height of the front end of the curved surface part is 0.5-8mm, and the central angle of the front end of the curved surface part is 2-25 degrees.

4. An assistive fin as set forth in claim 1, wherein: the flexible flipper support strip is in a T-shaped strip shape, the inner side of the flexible flipper support strip is used for clathrating the two sides of the flipper from front to back through the clamping groove, and the outer side of the flexible flipper support strip is provided with a structural reinforcing strip extending from front to back.

5. An assistive fin as set forth in claim 1, wherein: the front end of the flexible flipper support bar is fixedly arranged in the flexible flipper support bar jack of the fixed seat.

6. An assistive fin as defined in any one of claims 1 to 5, wherein: the material of the flipper is one of carbon fiber and glass fiber.

7. An assistive fin as defined in any one of claims 1 to 5, wherein: the material of flexible flipper support bar is one of silica gel, EPDM, TPU, chloroprene rubber.

8. A diving shoe having an assist fin as defined in any one of claims 1-7, wherein: the foot sleeve is detachably locked with the power-assisted flipper through the locking device.

9. The submersible shoe of claim 8, wherein: locking device includes retaining member and at least one screw, the retaining member is opened has the screw hole post that can mutually support with the screw, podotheca, fixing base be equipped with respectively with screw hole post is mated through-hole, when locking device locks fixing base and podotheca front end, the retaining member is located podotheca sole upper end, the screw passes behind the through-hole of fixing base and the through-hole of podotheca respectively and locks each other with the screw hole post.

10. The submersible shoe according to claim 9, wherein: the locking device also comprises a base plate, and the base plate is provided with a nail groove; the foot sleeve, the foot web and the fixed seat are respectively provided with a through hole matched with the threaded hole column; when the locking device locks the fixing seat, the front end of the flipper and the front end of the foot sleeve, the backing plate is positioned at the lower end of the sole of the foot sleeve, and the screws respectively penetrate through the nail groove of the backing plate, the through hole of the fixing seat, the through hole of the flipper and the through hole of the foot sleeve and then are locked with the threaded hole column.