阅读说明：本技术 一种基于神经网络信号的跌倒预警系统 (Tumble early warning system based on neural network signals ) 是由 刘鑫 何永琴 张玉梅 于 2021-07-20 设计创作，主要内容包括：本发明涉及特殊人群保护技术领域。目的在于提供一种基于神经网络信号的跌倒预警系统,包括能够安装在平底鞋底部的拆卸式鞋底和设置在鞋底内的位姿调整装置；所述拆卸式鞋底包括呈凹槽状的鞋底主体,鞋底主体的中部内设置有横板,所述横板将鞋底主体分隔为位于上部的、用于承托平底鞋的连接腔和位于下部的安装腔；所述安装腔内设置有横托板,所述横托板前后两端的左右两侧均对称设置有两个条形的安装口,每一个安装口对应的鞋底主体底部设置有一个动作口。本发明通过调节杆的摆动弹出,能够快速的对鞋底主体形成支撑,改变鞋底主体的位姿,从而起到防止跌倒的功能。(The invention relates to the technical field of special crowd protection. The falling early warning system comprises a detachable sole capable of being installed at the bottom of a flat sole and a pose adjusting device arranged in the sole; the detachable sole comprises a groove-shaped sole main body, a transverse plate is arranged in the middle of the sole main body, and the transverse plate divides the sole main body into a connecting cavity positioned at the upper part and used for supporting the flat shoes and an installation cavity positioned at the lower part; the sole is characterized in that a transverse supporting plate is arranged in the mounting cavity, two strip-shaped mounting openings are symmetrically formed in the left side and the right side of the front end and the rear end of the transverse supporting plate, and an action opening is formed in the bottom of the sole main body corresponding to each mounting opening. According to the invention, the adjusting rod is popped up through swinging, so that the support can be quickly formed on the sole main body, the pose of the sole main body is changed, and the function of preventing falling is achieved.)

1. A fall early warning system based on neural network signals comprises a detachable sole (1) which can be arranged at the bottom of a flat sole and a pose adjusting device arranged in the sole;

the method is characterized in that: the detachable sole (1) comprises a groove-shaped sole main body (2), a transverse plate (3) is arranged in the middle of the sole main body (2), and the transverse plate (3) divides the sole main body (2) into a connecting cavity (4) which is positioned at the upper part and used for supporting flat shoes and an installation cavity (5) which is positioned at the lower part; a transverse supporting plate (6) is arranged in the mounting cavity (5), two strip-shaped mounting openings (7) are symmetrically formed in the left side and the right side of the front end and the rear end of the transverse supporting plate (6), and an action opening (8) is formed in the bottom of the sole main body (2) corresponding to each mounting opening (7);

the pose adjusting device comprises adjusting mechanisms correspondingly arranged at each group of mounting ports (7) and action ports (8), and a controller (9) arranged between a transverse plate (3) and a transverse supporting plate (6) in the middle of the sole main body (2);

the adjusting mechanism comprises two sliding blocks (10) arranged on the upper surfaces of transverse supporting plates (6) on the left side and the right side of the mounting opening (7), sliding fit along the front-back direction of the sole main body (2) is formed between the sliding blocks (10) and the transverse supporting plates (6), a first waist-shaped hole (11) is formed in one end, far away from the center of the sole main body (2), of each sliding block (10), and each first waist-shaped hole (11) extends vertically and penetrates through each sliding block (10) along the left-right direction;

the adjusting mechanism also comprises an adjusting rod (12) and a driving component for driving the sliding block (10) to move along the front and back directions of the sole main body (2); adjust the upper portion of pole (12) middle section articulated with the left and right sides wall of installing port (7), the lower extreme of adjusting pole (12) sets up supports horizontal pole (13), the upper end of adjusting pole (12) be provided with first waist shape hole (11) matched with, along first rotating sleeve (14) that left right direction extends, first rotating sleeve (14) are worn to establish in first waist shape hole (11).

2. The neural network signal-based fall early warning system as claimed in claim 1, wherein: a second waist-shaped hole (15) which extends in the left-right direction and vertically penetrates through the sliding block (10) is formed in one end, close to the center of the sole main body (2), of the sliding block (10), a yielding groove (16) which extends in the left-right direction is formed in the end face, close to the center of the sole main body (2), of one end of the sliding block (10), and the yielding groove (16) penetrates through the second waist-shaped hole (15);

the driving assembly comprises a bridging plate (17) which is arranged above the mounting opening (7) in a crossing mode, two vertical pins (18) are arranged between the top of the bridging plate (17) and the transverse plate (3), and the pins (18) are symmetrically distributed at two ends of the bridging plate (17); the driving assembly further comprises a driving swing rod (19), a pin sleeve (20) matched with the pin column (18) is arranged in the middle section of the driving swing rod (19), and the pin sleeve (20) is sleeved on the pin column (18) and hinged with the pin column (18); one end of the driving swing rod (19) is provided with a vertical second rotating sleeve (21), and the second rotating sleeve (21) penetrates through the second waist-shaped hole (15); the driving component also comprises a driving part which is arranged at the other end of the driving swing rod (19) and is used for driving the driving swing rod (19) to swing around the pin (18); the driving part is electrically connected with the controller (9).

3. The neural network signal-based fall early warning system as claimed in claim 2, wherein: the driving component is an electromagnet (22).

4. The neural network signal-based fall early warning system as claimed in claim 3, wherein: permanent magnets (23) are further arranged at the positions, opposite to the electromagnets (22), of the left side wall and the right side wall of the sole main body (2), and the magnetic pole attribute of one end, opposite to the electromagnets (22), of each permanent magnet (23) is the same as the magnetic pole attribute of the corresponding end of the corresponding electromagnet (22) when the electromagnets (22) drive the two driving swing rods (19) of the driving assembly to be closed.

5. The neural network signal-based fall early warning system as claimed in claim 4, wherein: a U-shaped mounting frame (24) is arranged at one end, opposite to the electromagnet (22), of the driving swing rod (19), a rotary adjusting frame (25) is arranged between two branches of the mounting frame (24), and pin shafts at the upper end and the lower end of the rotary adjusting frame (25) penetrate through the two branches of the mounting frame (24) and are in running fit with the branches; the electromagnet (22) is fixedly arranged in the rotary adjusting frame (25).

6. The neural network signal-based fall early warning system as claimed in claim 5, wherein: the supporting cross rod (13) is sleeved with a rubber anti-slip sleeve (26).

7. The neural network signal-based fall early warning system as claimed in claim 6, wherein: the height of slider (10) and the interval cooperation of horizontal layer board (6) and diaphragm (3), the left and right sides of slider (10) top and bottom all are provided with sliding tray (27) along sole main part (2) fore-and-aft direction extension, correspond on horizontal layer board (6) and diaphragm (3) and be provided with guide rail (28) with sliding tray (27) matched with, guide rail (28) card is established in sliding tray (27).

8. The neural network signal-based fall early warning system as claimed in claim 7, wherein: the front part of the detachable sole (1) is provided with three first straps (29) used for being connected with the upper of the flat shoe, and the rear part is provided with a second strap (30) used for being connected with the heel of the flat shoe.

9. The neural network signal-based fall early warning system as claimed in claim 8, wherein: the first binding belt (29) and the second binding belt (30) are magic binding belts.

10. The neural network signal-based fall early warning system as claimed in claim 9, wherein: the bottom of the sole main body (2) is also provided with an anti-skid layer (31).

Technical Field

The invention relates to the technical field of special crowd protection, in particular to a falling early warning system based on a neural network signal.

Background

In recent years and the following years, along with the more prominent senile problem of population structure in China, the safety protection problem of the old people is more and more concerned and more emphasized, the falling of the old people is one of common safety accidents of the old people, and the old people can cause stroke paralysis and even death when the old people fall seriously.

During walking, the foot is the starting point of the most exertion and the base of the walking support of the human body, and during the walking process, the stress condition of the foot is that the sole pressure center is gradually transferred from the heel to the front sole area corresponding to the second finger, then transferred to the area corresponding to the first finger at the moment of leaving the ground, and the process is repeated in a circulating way. Therefore, whether the walking gait of the human body is normal can be judged by detecting and analyzing the pressure of the sole and the transfer of the pressure center, and then the falling risk in the walking process is judged in advance.

At present, the method for analyzing human gait by pressure signal acquisition and feedback is widely applied in the fields of medical treatment, health care and nursing. On the basis, in order to improve the accuracy of the judgment, in the prior art, the accuracy of the judgment is even improved by a threshold judgment mode, a neural network signal judgment mode or a combination mode of the threshold judgment mode and the neural network signal judgment mode. Based on threshold judgment, the judgment is mainly carried out by comparing independent data such as pressure, frequency and the like with one or more preset thresholds, the implementation complexity of the method is low, but the detection precision is relatively poor, and the false detection rate is relatively high; the method is a detection method based on mode discrimination of machine learning, a neural network model is constructed by extracting data features, and data is accurately analyzed through deep learning of the neural network model, so that falling risks under various complex conditions can be judged, the possibility of misjudgment is greatly reduced, and the reliability is improved.

However, the core of such a fall early warning system still lies in performing early warning reminding, positioning pushing and the like on a guardian, a medical staff or a user, but the system does not have the protection for old people to fall, that is, the system cannot directly reduce the fall risk of the old people, and more emphasis is placed on follow-up measures and remedial measures after the fall. Meanwhile, based on the requirement of daily life, the equipment system cannot be considered from the function of the equipment, the use convenience and the wearing effectiveness should be considered comprehensively, and the shoes are used as necessary living materials for going out and have the advantage of being good carriers of the fall early warning protection system.

As is known, the main reason of falling is the unbalance of the center of gravity, and the old people cannot timely adjust the foot support due to the reduction of physical functions, therefore, the existing neural network detection module is combined to detect gait and body posture, the rapid adjustment and support of the shoe body to the foot are realized through a rapid reaction mode, the falling risk of the old people can be greatly reduced, and the prevention and the protection are essentially realized.

Disclosure of Invention

The invention aims to provide a fall early warning system based on neural network signals, which is rapid in response and compact in structure.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a fall early warning system based on neural network signals comprises a detachable sole which can be installed at the bottom of a flat sole and a pose adjusting device arranged in the sole;

the detachable sole comprises a groove-shaped sole main body, a transverse plate is arranged in the middle of the sole main body, and the transverse plate divides the sole main body into a connecting cavity positioned at the upper part and used for supporting the flat shoes and an installation cavity positioned at the lower part; a transverse supporting plate is arranged in the mounting cavity, two strip-shaped mounting openings are symmetrically formed in the left side and the right side of the front end and the right end of the transverse supporting plate, and an action opening is formed in the bottom of the sole main body corresponding to each mounting opening;

the pose adjusting device comprises adjusting mechanisms correspondingly arranged at each group of mounting openings and action openings, and a controller arranged between a transverse plate and a transverse supporting plate in the middle of the sole main body;

the adjusting mechanism comprises two sliding blocks arranged on the upper surfaces of transverse supporting plates on the left side and the right side of the mounting opening, sliding fit along the front-back direction of the sole main body is formed between the sliding blocks and the transverse supporting plates, a first waist-shaped hole is formed in one end, far away from the center of the sole main body, of each sliding block, and the first waist-shaped hole extends vertically and penetrates through the sliding blocks along the left-right direction;

the adjusting mechanism also comprises an adjusting rod and a driving assembly for driving the sliding block to move along the front and back directions of the sole main body; the upper portion of adjusting the pole middle section is articulated with the left and right sides wall of installing port, and the lower extreme of adjusting the pole sets up the support horizontal pole, and the upper end of adjusting the pole is provided with first waist shape hole matched with, along the first cover that rotates of left and right directions extension, first cover that rotates wears to establish at first waist shape downthehole.

Preferably, one end of the sliding block, which is close to the center of the sole main body, is provided with a second waist-shaped hole which extends in the left-right direction and vertically penetrates through the sliding block, and the end face of one end of the sliding block, which is close to the center of the sole main body, is provided with a abdicating groove extending in the left-right direction, and the abdicating groove and the second waist-shaped hole penetrate through each other;

the driving assembly comprises a bridging plate which is arranged above the mounting opening in a crossing mode, two vertical pins are arranged between the top of the bridging plate and the transverse plate, and the pins are symmetrically distributed at two ends of the bridging plate; the driving assembly further comprises a driving swing rod, a pin sleeve matched with the pin column is arranged in the middle section of the driving swing rod, and the pin sleeve is sleeved on the pin column and hinged with the pin column; one end of the driving swing rod is provided with a vertical second rotating sleeve, and the second rotating sleeve is arranged in a second kidney-shaped hole in a penetrating mode; the driving component also comprises a driving part which is arranged at the other end of the driving swing rod and is used for driving the driving swing rod to swing around the pin; the driving part is electrically connected with the controller.

Preferably, the driving member is an electromagnet.

Preferably, permanent magnets are further arranged at positions of the left side wall and the right side wall of the sole main body, which are opposite to the electromagnets, and the magnetic pole attributes of the ends, which are opposite to the electromagnets, of the permanent magnets are the same as the magnetic pole attributes of the electromagnets when the two driving swing rods of the driving assembly are driven by the electromagnets to be closed.

Preferably, a U-shaped mounting frame is arranged at one end, opposite to the electromagnet, of the driving swing rod, a rotary adjusting frame is arranged between two branches of the mounting frame, and pin shafts at the upper end and the lower end of the rotary adjusting frame penetrate through the two branches of the mounting frame and are in running fit with the branches; the electromagnet is fixedly arranged in the rotary adjusting frame.

Preferably, the supporting cross rod is sleeved with a rubber anti-slip sleeve.

Preferably, the height of slider and the interval of horizontal layer board and diaphragm cooperate, and the left and right sides of slider top and bottom all is provided with the sliding tray that extends along sole main part fore-and-aft direction, correspond on horizontal layer board and the diaphragm and be provided with the guide rail with sliding tray matched with, the guide rail card is established in the sliding tray.

Preferably, the front part of the detachable sole is provided with three first straps for connecting with the upper of the flat shoe, and the rear part is provided with a second strap for connecting with the heel of the flat shoe.

Preferably, the first and second bands are hook-and-loop bands.

Preferably, the bottom of the sole main body is further provided with an anti-slip layer.

The beneficial effects of the invention are concentrated and expressed as follows: the adjusting rod can be popped up through swinging, so that the support can be quickly formed on the sole main body, the pose of the sole main body is changed, and the function of preventing falling is achieved. Specifically, in the using process, the falling risk of the user is accurately evaluated through the detection and analysis device based on the neural network signals, which is consistent with the prior art; after detecting accurate risk of tumbleing, the action of controller control drive assembly, drive assembly control slider motion, and then the motion through the slider drives the regulation pole motion for the lower extreme of adjusting the pole pops out rapidly, forms the support, and through many regulation poles in coordination, and then change the position appearance of sole main part, provide the auxiliary stay for user's foot, prevent that it tumbles. The invention adopts the swing of the adjusting rod to adjust the pose, so the reaction speed is very quick. Meanwhile, an oblique supporting force is essentially provided in the process of adjusting the swing of the rod instead of a vertical supporting force in the traditional mode, so that the anti-falling effect is better. In addition, the adjusting rod is driven to move through the movement of the sliding block in the front-back direction of the sole main body, so that the overall layout is more compact, the overall thickness of the detachable sole is reduced, and the detachable sole is more convenient to use.

Drawings

FIG. 1 is a schematic view of a flat-bottom shoe and a flat-bottom shoe with the present invention installed;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a view from the B-B direction of the structure shown in FIG. 2;

FIG. 5 is an enlarged view of the portion C of FIG. 4;

FIG. 6 is a schematic structural view of a slider;

fig. 7 is a schematic view of the installation of the rotating adjustment bracket.

Detailed Description

As shown in fig. 1 to 7, a fall early warning system based on neural network signals comprises a detachable sole 1 which can be installed at the bottom of a flat sole and a pose adjusting device arranged in the sole. The detachable sole 1 and the pose adjusting device are matched based on a neural network, the detecting device with the autonomous deep learning function is used, the detecting device is used for accurately detecting the falling risk of a user, the detection distance can be detected through the change trend of the pressure of the sole of a foot, the acceleration of the waist and the like, the deep learning function of the neural network is matched, the detection accuracy can be greatly improved, the false detection rate is reduced, a falling risk detecting method adopting the neural network deep learning is widely disclosed in the prior art, and the falling risk detecting method is not repeated in the invention. And the pose adjusting mechanism is used for applying a correcting thrust to the foot, so that the falling is prevented. The detachable sole 1 is used for being installed on a flat shoe used by a user in daily life, and is convenient to detach and install.

Dismantlement formula sole 1 is including the sole main part 2 that is the recess form, because 2 area body flat shoes soles of sole main part and ground direct contact, for improving anti-skidding wearability, the bottom of sole main part 2 still is provided with skid resistant course 31. Be provided with diaphragm 3 in the middle part of sole main part 2, diaphragm 3 separates sole main part 2 for being located upper portion, being used for the connecting cavity 4 of bearing flat shoes and being located the installation cavity 5 of lower part. When in use, after the shoes are worn, the shoes are stepped into the connecting cavity 4 and then fixed. The disassembly and assembly of the shoe can be carried out in the simplest and fastest way by fastening the shoe in a binding manner, and specifically, the disassembly shoe sole 1 can be provided with three first straps 29 at the front part for connecting with the upper of the flat shoe and one second strap 30 at the rear part for connecting with the heel of the flat shoe. The first and second bands 29 and 30 are fastened together by the first and second bands 29 and 30, and the first and second bands 29 and 30 are hook and loop fasteners for further convenience of operation.

Regarding how to adjust the pose, a transverse supporting plate 6 is arranged in the mounting cavity 5, two strip-shaped mounting openings 7 are symmetrically arranged on the left side and the right side of the front end and the rear end of the transverse supporting plate 6, the mounting openings 7 extend along the front-rear direction of the sole main body 2, and an action opening 8 is arranged at the bottom of the sole main body 2 corresponding to each mounting opening 7. That is, the horizontal support plate 6 is provided with 4 mounting ports 7 in total, two on the left and right sides of the front end and two on the left and right sides of the rear end, but may be increased or decreased as appropriate according to actual circumstances. Here, the present invention takes 4 mounting ports 7 and 4 actuating ports 8 as an example. The pose adjusting device comprises adjusting mechanisms correspondingly arranged at each group of mounting ports 7 and action ports 8, and a controller 9 arranged between the transverse plate 3 and the transverse supporting plate 6 in the middle of the sole main body 2. The adjusting mechanism acts under the general control of the controller 9 and is used for supporting each part of the sole main body 2 so as to adjust the pose thereof.

As shown in fig. 2 to 6, the adjusting mechanism includes two sliding blocks 10 disposed on the upper surfaces of the horizontal supporting plates 6 on the left and right sides of the mounting opening 7, and a sliding fit is formed between the sliding blocks 10 and the horizontal supporting plates 6 along the front-back direction of the sole main body 2, which is configured in many ways, for example, a guide hole is disposed in the sliding block 10, a guide rod is disposed on the horizontal supporting plate 6, and the guide rod is inserted into the guide hole to form a guide fit. Of course, in order to improve the compactness of the layout and the stability of the movement of the sliding block 10, the invention may be better implemented by matching the height of the sliding block 10 with the distance between the transverse supporting plate 6 and the transverse plate 3, and forming the limit in the height direction through the transverse plate 3 and the transverse supporting plate 6. The left and right sides at slider 10 top and bottom all is provided with the sliding tray 27 that extends along sole main part 2 fore-and-aft direction, correspond on horizontal layer board 6 and the diaphragm 3 and be provided with the guide rail 28 with sliding tray 27 matched with, guide rail 28 card is established in sliding tray 27. The sliding groove 27 and the guide rail 28 form guiding and limiting, so that the moving stability of the sliding block 10 can be improved.

As shown in fig. 6, one end of the slider 10 away from the center of the sole body 2 is provided with a first kidney-shaped hole 11, and in fig. 2, one end away from the center of the sole body 2, that is, the left end of the slider 10 on the left side and the right end of the slider 10 on the right side, are provided with first kidney-shaped holes 11; the first waist-shaped hole 11 extends vertically and penetrates through the slider 10 along the left-right direction. The adjusting mechanism further comprises an adjusting rod 12 and a driving component for driving the sliding block 10 to move along the front and back directions of the sole main body 2. The upper portion of adjusting pole 12 middle section is articulated with the left and right sides wall of installing port 7, and the lower extreme of adjusting pole 12 sets up supports horizontal pole 13, and the upper end of adjusting pole 12 is provided with first waist shape hole 11 matched with, along the first cover 14 that rotates of left and right directions extension, first cover 14 that rotates wears to establish in first waist shape hole 11. In this way, as shown in fig. 2 and 3, the adjustment lever 12 is driven to swing about the hinge center by the movement of the slider 10 in the left-right direction in the drawing (i.e., the front-rear direction of the shoe sole body 2), thereby forming a height support by the support rail 13 at the lower end of the adjustment lever 12. Since the support rail 13 at the lower end of the adjustment rod 12 is in contact with the ground, the support rail 13 is sleeved with a rubber anti-slip sleeve 26 to improve anti-slip and wear-resisting properties. In a normal state, the adjusting rod 12 is retracted into the actuating opening 8 and is driven to swing out only when height support is required.

In the using process, the falling risk of the user is accurately evaluated through the detection and analysis device based on the neural network signals, which is consistent with the prior art; after detecting accurate risk of falling, controller 9 control drive assembly action, and drive assembly control slider 10 motion, and then drive through the motion of slider 10 and adjust pole 12 motion for the lower extreme of adjusting pole 12 pops out fast, forms the support, and through many regulation poles 12 in coordination, and then change sole main part 2's position appearance, provide the auxiliary stay for user's foot, prevent that it from falling. The invention adopts the swing of the adjusting rod 12 to adjust the pose, and the reaction speed is very quick. Meanwhile, an oblique supporting force is essentially provided in the process of swinging the adjusting rod 12 instead of the vertical supporting force in the traditional mode, so that the falling prevention effect is better. For example: when the user leans backward, the adjustment lever 12 located at the rear end of the sole main body 2 swings out to raise the sole main body 2. Since the movement of the adjustment lever 12 is a front-to-rear swing, it provides in effect a rear, forward, diagonal inference of the foot. In addition, the adjusting rod 12 is driven to move by the movement of the slider 10 in the front-rear direction of the sole main body 2, so the overall layout is more compact, the overall thickness of the detachable sole is reduced, and the use is more convenient. Compared with a mode of adopting the air cylinder and the electric push rod to extend out in the vertical direction for height support, the novel multifunctional electric support is thinner in overall thickness and light in wearing under the same support height margin.

As for how to drive the slider 10 to move in the front-back direction, a transverse electric push rod, a transverse air cylinder push rod, and the like can be arranged, but on one hand, the reaction speed of the driving components is slow, and on the other hand, under the condition of meeting the thrust requirement and the miniaturization requirement, the electric push rod, the transverse air cylinder push rod, and the like are high in cost, and in order to reduce the overall use cost, a more sufficient transverse thrust is provided for the slider 10. As shown in fig. 6, a second kidney-shaped hole 15 extending in the left-right direction and vertically penetrating through the slider 10 is formed in one end of the slider 10 close to the center of the sole body 2, a relief groove 16 extending in the left-right direction is formed in an end face of one end of the slider 10 close to the center of the sole body 2, and the relief groove 16 is intersected with the second kidney-shaped hole 15. As shown in fig. 5, the driving assembly comprises a bridging plate 17 which is arranged across the mounting opening 7, two vertical pins 18 are arranged between the top of the bridging plate 17 and the transverse plate 3, and the pins 18 are symmetrically distributed at two ends of the bridging plate 17. The driving assembly further comprises a driving swing rod 19, a pin sleeve 20 matched with the pin 18 is arranged in the middle section of the driving swing rod 19, and the pin sleeve 20 is sleeved on the pin 18 and hinged to the pin 18. One end of the driving swing rod 19 is provided with a vertical second rotating sleeve 21, and the second rotating sleeve 21 is arranged in the second kidney-shaped hole 15 in a penetrating mode. The driving swing link 19 of the present invention essentially forms a lever, and a force is amplified by the lever, and the driving swing link 19 can amplify the force and transmit the amplified force to the slider 10 to drive the slider 10 to move by applying a force to one end of the long moment of the driving swing link 19. That is, the driving assembly further includes a driving member provided at the other end of the driving swing link 19 for driving the driving swing link 19 to swing about the pin 18. The driving part is electrically connected with the controller 9. In order to ensure the sensitivity and rapidity of the driving member, the electromagnet 22 is preferably selected as the driving member. As shown in fig. 4, when the electromagnet 22 is energized, the two-stage magnetization thereof is of corresponding polarity, thereby driving the driving swing links 19 to move toward and away from each other.

Of course, in order to ensure that the position of the electromagnet 22 can be adjusted in a self-adaptive manner in the process of rotating along with the driving swing rod 19, as shown in fig. 7, one end of the driving swing rod 19 opposite to the electromagnet 22 is provided with a U-shaped mounting frame 24, a rotary adjusting frame 25 is arranged between two branches of the mounting frame 24, and pin shafts at the upper end and the lower end of the rotary adjusting frame 25 penetrate through the two branches of the mounting frame 24 and form a rotating fit with the branches. The electromagnet 22 is fixedly arranged in the rotary adjusting frame 25. It is anticipated that the angular adjustment of the rotary adjustment bracket 25 relative to the mounting bracket 24 should be a fine adjustment, merely to accommodate the offset position of the electromagnet 22 during rotation of the drive rocker 19, rather than providing complete free rotation, which is typically around 2-5 °. The specific angle limiting mode can be achieved by referring to the prior art, and only by arranging limiting blocks in pin holes of the pin shaft and the mounting frame 24, which is not described in detail in the invention.

In addition, in order to maximize the utilization of the two-pole magnetism of the electromagnet 22, permanent magnets 23 are further arranged at the positions of the left side wall and the right side wall of the sole main body 2, which are opposite to the electromagnet 22, and the magnetic pole property of the end, opposite to the electromagnet 22, of the permanent magnet 23 is the same as the magnetic pole property of the electromagnet 22 when the two driving swing rods 19 of the driving assembly are driven to close. As shown in fig. 4, the polarity of the two ends of the electromagnet 22 in an energized state is indicated, in which the drive rocker 19 is driven to close. In the case of reverse energization, the drive rocker 19 is then disengaged. But due to the particular arrangement shown in the drawings, the magnetic properties at both ends of each electromagnet 22 are maximised.