A flexible fixing device for myoelectric electrodes and an electromyograph

Abstract

The present invention relates to the technical field of electromyographs, and specifically to a flexible fixing device for electromyograph electrodes and an electromyograph, comprising a shell, a silicone pad fixed to the bottom of the shell, a first gear rotatably arranged in the shell, a cylinder fixed on the first gear, an electrode arranged below the cylinder, and a stacked airbag, a spring and a limit rod fixed to the electrode arranged in sequence from top to bottom inside the cylinder, wherein the stacked airbag is fixed to the top wall inside the cylinder, the two ends of the spring are respectively fixed to the stacked airbag and the limit rod, and a piston mechanism for inflating and deflating the stacked airbag is provided on the shell; a main shaft rotatably arranged on the shell, and the main shaft is coordinated with the first gear and the stacked airbag through a first linkage structure. The flexible fixation of the present invention enables the electrode to still be independently adjusted after the shell is fixed, dynamically compensate for skin deformation, and better actively adhere to the skin surface when in contact with the skin, while adapting to different body surface curvatures and dynamic deformation requirements.

Description

Technical Field

[0001] The invention relates to the technical field of electromyographs, in particular to a flexible fixing device for myoelectric electrodes and an electromyograph. Background Art

[0002] Electromyography (EMG) technology is an important medical diagnostic and research tool for analyzing the functional state of the neuromuscular system by detecting the electrical signals generated by muscle contractions. It is widely used in clinical medicine, sports science, rehabilitation medicine, and human-computer interaction. The quality of EMG signal acquisition directly depends on the stable contact between the electrodes and the skin surface. However, traditional EMG electrode fixation methods have significant limitations, restricting their effectiveness in high-dynamic scenarios.

[0003] Traditional myoelectric electrodes often use fixed frames made of rigid materials (such as plastic or metal) or are attached with adhesive tape. This can lead to displacement or detachment of the electrode-skin interface during movement, resulting in poor signal stability, particularly during dynamic activities (such as sports rehabilitation and physical training). Furthermore, rigid materials lack the ability to adapt to body surface morphology (such as joint flexion and muscle contraction), which can easily cause localized pressure concentration and discomfort in the subject. Furthermore, while existing flexible electrodes utilize elastic base materials (such as silicone or polyurethane film), such as the myoelectric electrode holder and device disclosed in patent CN208988874U, these fixtures often rely on passive elastic deformation and lack an active conforming mechanism, making them difficult to adapt to varying body curvatures and dynamic deformations. This results in insufficient signal acquisition consistency. To address these issues, we provide a flexible myoelectric electrode fixture and electromyograph to address these issues. Summary of the Invention

[0004] The purpose of the present invention is to provide a flexible fixing device for myoelectric electrodes and an electromyograph, so as to solve the problem proposed in the above background technology that traditional myoelectric electrodes mostly use a fixing frame made of hard materials (such as plastic or metal) or a tape-adhesive method, which makes the electrode and the skin contact surface easily displaced or detached during human movement, especially in dynamic activities (such as sports rehabilitation, physical training), and the signal stability is poor. Although the existing flexible electrodes use elastic base materials (such as silicone, polyurethane film), their fixing devices mostly rely on passive elastic deformation and lack an active fitting mechanism, making it difficult to adapt to different body surface curvatures and dynamic deformation requirements, resulting in insufficient signal acquisition consistency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A flexible fixing device for an electromechanical electrode comprises a housing, a silicone pad being fixed to the bottom of the housing, a first gear being rotatably disposed within the housing, a cylinder being fixed to the first gear, an electrode being disposed below the cylinder, and a stacked airbag, a spring, and a limit rod fixed to the electrode being sequentially disposed inside the cylinder from top to bottom, wherein the stacked airbag is fixed to the top wall of the cylinder, the two ends of the spring being respectively fixed to the stacked airbag and the limit rod, and a piston mechanism for inflating and deflating the stacked airbag being disposed on the housing;

[0007] A main shaft is rotatably provided on the shell, and the main shaft cooperates with the first gear and the stacked airbag through a first linkage structure. When the main shaft rotates, it will drive the first gear to rotate at a fixed angle intermittently and intermittently inflate and deflate the stacked airbag. One intermittent periodic action is that the stacked airbag is deflated once, the first gear rotates at a fixed angle once, and then the stacked airbag is inflated again.

[0008] The flexible fixing device for myoelectric electrodes as described above: a motor is fixed on the housing, and an output end of the motor is connected to the main shaft through a coupling to drive the main shaft to rotate.

[0009] A flexible fixing device for myoelectric electrodes as described above: the piston mechanism includes a piston cylinder fixed in a shell, a piston movably clamped in the piston cylinder, a hose connected to the stacked airbag is fixed on the piston cylinder, and the piston moves back and forth in the piston cylinder to inflate and deflate the stacked airbag.

[0010] A flexible fixing device for an electromyographic electrode as described above: the first linkage structure includes a first rotating rod and a second rotating rod rotatably arranged on the shell, and the main shaft and the first rotating rod and the second rotating rod are coordinated through an intermittent mechanism. When the main shaft rotates, it will drive the first rotating rod and the second rotating rod to rotate intermittently at a fixed angle respectively, and when the first rotating rod rotates, the second rotating rod does not rotate, and when the second rotating rod rotates, the first rotating rod does not rotate. The first rotating rod and the first gear are transmitted through a first gear mechanism, and the first rotating rod will drive the first gear to rotate when it rotates. The second rotating rod and the piston are coordinated through a second linkage structure, and the second rotating rod will drive the piston to move back and forth in the piston cylinder when it rotates.

[0011] A flexible fixing device for an electromyographic electrode as described above: the intermittent mechanism includes a driving wheel fixed on the main shaft, a second gear fixed on the first rotating rod and a second driven wheel fixed on the second rotating rod, and the two sides of the driving wheel respectively cooperate with the first driven wheel and the second driven wheel for transmission.

[0012] As described above, in a flexible fixing device for an electromyographic electrode, the first gear mechanism includes a third gear rotatably arranged on the housing and a second gear fixed on the first rotating rod, and both sides of the third gear are respectively engaged with the first gear and the second gear.

[0013] A flexible fixing device for an electromyographic electrode as described above: the second linkage structure includes a third rotating rod rotatably arranged on the shell, and the third rotating rod is coordinated with the second rotating rod through a second gear mechanism. When the second rotating rod rotates, it will drive the third rotating rod to rotate. A rotating wheel is fixed on the third rotating rod, and a swing arm is hinged on the rotating wheel. A connecting rod is arranged between the swing arm and the piston, and the two ends of the connecting rod are respectively hinged to the swing arm and the piston.

[0014] In the flexible fixing device for myoelectric electrodes as described above, the second gear mechanism includes a fourth gear fixed on the second rotating rod and a fifth gear fixed on the third rotating rod, and the fourth gear is meshed with the fifth gear.

[0015] The flexible fixing device for myoelectric electrodes as described above: a pressure sensor for detecting the pressure exerted on the electrode when in contact with the body is fixedly mounted on the bottom of the electrode.

[0016] An electromyograph comprises an electromyograph, wherein the electromyograph is connected to a flexible fixing device for myoelectric electrodes via a wire.

[0017] Compared with the prior art, the present invention has the following advantages: when in use, the shell is adhered to the skin surface through the silicone pad. The silicone pad is a flexible material and can better fit the skin surface when in contact with the skin, and is not easy to fall off during human movement.

[0018] In addition, an electrode is provided at the bottom of the cylinder of the present invention. The electrode is attached to the surface of the body to detect the electrical signal generated when the muscle contracts, and the functional state of the neuromuscular system is analyzed. The interior of the cylinder is sequentially provided with a stacked airbag, a spring and a limit rod fixed to the electrode from top to bottom. The shell is provided with a piston mechanism for inflating and deflating the stacked airbag. Since the stacked airbag can be inflated and deflated, the inflation of the stacked airbag will expand and squeeze the spring. The spring is squeezed and transmits the squeezing force to the limit rod, driving the limit rod to move downward in the cylinder and then driving the electrode to move downward and press against the body surface. Therefore, when the shell of the present invention is attached to the surface of the body skin, the electrode is non-rigidly fixed to the body surface. The expansion or contraction of the stacked airbag drives the spring to stretch and contract, so that the electrode is flexibly fixed to the body surface. The flexible fixation allows the electrode to be independently adjusted after the shell is fixed, dynamically compensates for skin deformation, and can better actively fit the skin surface when in contact with the skin, while adapting to different body surface curvatures and dynamic deformation requirements. The flexible fixation makes the shell more comfortable to wear.

[0019] In addition, a main shaft is rotatably provided on the shell of the present invention, and while the main shaft rotates, it drives the first gear to rotate at a fixed angle intermittently and to intermittently inflate and deflate the stacked airbags, wherein one intermittent periodic action is that the stacked airbags are deflated once and then the first gear rotates at a fixed angle once, and then the stacked airbags are inflated again. That is, when the electrode of the present invention is attached to the surface of the body, the driving main shaft to rotate can drive the stacked airbags to deflate and then drive the first gear to rotate at a fixed angle once, and then the stacked airbags are inflated again to move the electrode downward and press it tightly against the skin surface, thereby repeating the above actions. When the electrode of the present invention still cannot be tightly attached to the surface of the body to collect electrical signals after the shell is installed and the stacked airbags are inflated, the electrode can actively move in a circular direction on the surface of the body to change the contact position with the body, and then after the shell is installed, the electrode has the function of autonomously changing and adjusting the position to find a suitable collection point position on the surface of the body, thereby adapting to different surface curvatures and dynamic deformation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a structural schematic diagram of a flexible fixing device for myoelectric electrodes and an electromyograph.

[0021] Figure 2 This is a structural schematic diagram of a flexible fixing device for myoelectric electrodes from a first perspective.

[0022] Figure 3 This is a structural schematic diagram of a flexible fixing device for myoelectric electrodes from a second perspective.

[0023] Figure 4 This is a schematic diagram of the internal structure of a shell of a flexible fixing device for electromyographic electrodes.

[0024] Figure 5 A flexible fixing device for myoelectric electrodes Figure 4 Schematic diagram of the decomposed structure.

[0025] Figure 6 A flexible fixing device for myoelectric electrodes Figure 5 Schematic diagram of the decomposed structure.

[0026] Figure 7 A flexible fixing device for myoelectric electrodes Figure 6 A structural diagram from another perspective.

[0027] Figure 8 This is a schematic diagram of the partial structure of a flexible fixing device for myoelectric electrodes.

[0028] Figure 9 This is a schematic diagram of the coordinated installation structure of the cylinder and electrode of a flexible fixing device for myoelectric electrodes.

[0029] Figure 10This is a schematic diagram of the internal structure of a flexible fixing device for electromyographic electrodes after the cylinder is cut open.

[0030] In the figure: 1. Shell; 2. Silicone pad; 3. First gear; 4. Cylinder; 5. Limit rod; 6. Electrode; 7. Laminated airbag; 8. Spring; 9. Main shaft; 10. First rotating rod; 11. Second rotating rod; 12. Second gear; 13. Third gear; 14. First driven wheel; 15. Second driven wheel; 16. Third rotating rod; 17. Fourth gear; 18. Fifth gear; 19. Rotating wheel; 20. Swing arm; 21. Piston cylinder; 22. Connecting rod; 23. Piston; 24. Hose; 25. Motor; 26. Pressure sensor; 27. EMG machine; 28. Wire; 29. ​​Driving wheel. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] See also Figures 1 to 10 As an embodiment of the present invention, a flexible fixing device for myoelectric electrodes and an electromyograph are provided, comprising a housing 1, a silicone pad 2 being fixed to the bottom of the housing 1, a first gear 3 being rotatably disposed within the housing 1, a cylinder 4 being fixed to the first gear 3, an electrode 6 being disposed below the cylinder 4, and a stacked airbag 7, a spring 8, and a limit rod 5 fixed to the electrode 6 being sequentially disposed inside the cylinder 4 from top to bottom, wherein the stacked airbag 7 is fixed to the top wall of the cylinder 4, the two ends of the spring 8 are respectively fixed to the stacked airbag 7 and the limit rod 5, and a piston mechanism for inflating and deflating the stacked airbag 7 is provided on the housing 1;

[0033] A main shaft 9 is rotatably provided on the shell 1, and the main shaft 9 is coordinated with the first gear 3 and the stacked airbag 7 through a first linkage structure. When the main shaft 9 rotates, it will drive the first gear 3 to rotate at a fixed angle intermittently and intermittently inflate and deflate the stacked airbag 7. One intermittent periodic action is that the stacked airbag 7 is deflated once, the first gear 3 rotates at a fixed angle once, and then the stacked airbag 7 is inflated again.

[0034] In this embodiment, when in use, the shell 1 is adhered to the skin surface through the silicone pad 2. The silicone pad 2 is a flexible material that can better fit the skin surface when in contact with the skin and is not easy to fall off during human movement. An electrode 6 is provided under the cylinder 4. The electrode 6 is attached to the body surface to detect the electrical signal generated when the muscle contracts and analyze the functional state of the neuromuscular system. The inside of the cylinder 4 is sequentially provided with a stacked airbag 7, a spring 8 and a limit rod 5 fixed to the electrode 6 from top to bottom. The shell 1 is provided with a piston mechanism for inflating and deflation of the stacked airbag 7. Since the stacked airbag 7 can be inflated and deflated, the inflation of the stacked airbag 7 will expand and squeeze the spring 8. When the spring 8 is squeezed, it transmits the squeezing force to the limit rod 5, driving the limit rod 5 to move downward in the cylinder 4, and then driving the electrode 6 to move downward and only press on the body surface. Therefore, when the shell 1 is attached to the skin surface of the body, the electrode 6 is non-rigidly fixed to the body surface. The expansion or contraction of the stacked airbags 7 drives the spring 8 to expand and contract, so that the electrode 6 is flexibly fixed to the body surface. The flexible fixation allows the electrode 6 to independently adjust its displacement after the shell 1 is fixed, dynamically compensates for skin deformation, and can better actively fit the skin surface when in contact with the skin. At the same time, it adapts to different body surface curvatures and dynamic deformation requirements. The flexible fixation makes the shell 1 more comfortable to wear.

[0035] In addition, a main shaft 9 is rotatably provided on the shell 1. When the main shaft 9 rotates, it will drive the first gear 3 to rotate at a fixed angle intermittently and intermittently inflate and deflate the stacked airbag 7. One intermittent periodic action is that the stacked airbag 7 is deflated once and then the first gear 3 rotates at a fixed angle once, and then the stacked airbag 7 is inflated again. That is, when the electrode 6 is attached to the surface of the body, the main shaft 9 is driven to rotate to drive the stacked airbag 7 to deflate and then drive the first gear 3 to rotate at a fixed angle once, and then the stacked airbag 7 is inflated again to move the electrode 6 downward and press it against the skin surface. By repeating the above actions, when the electrode 6 still cannot be tightly attached to the surface of the body to collect electrical signals after the shell 1 is installed and the stacked airbag 7 is inflated, the electrode 6 can perform active circular motion on the surface of the body to change the contact position with the body, and then the electrode 6 has the function of autonomous position adjustment after the shell 1 is installed.

[0036] As a further solution of the present invention, a motor 25 is fixed to the housing 1 , and an output end of the motor 25 is connected to the main shaft 9 through a coupling to drive the main shaft 9 to rotate.

[0037] In this embodiment, the motor 25 is electrically connected to the external power supply through a wire. Starting the motor 25 can drive the main shaft 9 to rotate, and an encoder is installed on the motor 25. The encoder is connected to the PLC electrical signal in the external electromyograph 27. The encoder and the PLC in the external electromyograph 27 are used to control the fixed angle rotation and forward and reverse rotation of the motor 25 to drive the first gear 3 forward and reverse.

[0038] As a further solution of the present invention, the piston mechanism includes a piston cylinder 21 fixed in the housing 1, a piston 23 is movably connected in the piston cylinder 21, a hose 24 connected to the stacked airbag 7 is fixed on the piston cylinder 21, and the piston 23 moves back and forth in the piston cylinder 21 to inflate and deflate the stacked airbag 7.

[0039] In this embodiment, when the piston 23 moves in the piston cylinder 21, it cooperates with the hose 24 to inflate the stacked airbag 7, causing the stacked airbag 7 to expand and thereby squeeze the spring 8, driving the electrode 6 to move downward. In addition, when the piston 23 moves in the piston cylinder 21 to the outside of the piston cylinder 21, it cooperates with the hose 24 to evacuate the inside of the stacked airbag 7, causing the stacked airbag 7 to shrink, thereby elastically restoring the spring 8 and pulling the electrode 6 upward.

[0040] As a further solution of the present invention, the first linkage structure includes a first rotating rod 10 and a second rotating rod 11 rotatably arranged on the shell 1, and the main shaft 9 and the first rotating rod 10 and the second rotating rod 11 are coordinated through an intermittent mechanism. When the main shaft 9 rotates, it will drive the first rotating rod 10 and the second rotating rod 11 to rotate intermittently at a fixed angle, and when the first rotating rod 10 rotates, the second rotating rod 11 does not rotate, and when the second rotating rod 11 rotates, the first rotating rod 10 does not rotate. The first rotating rod 10 and the first gear 3 are transmitted through a first gear mechanism. When the first rotating rod 10 rotates, it will drive the first gear 3 to rotate. The second rotating rod 11 and the piston 23 are coordinated through a second linkage structure. When the second rotating rod 11 rotates, it will drive the piston 23 to move back and forth in the piston cylinder 21.

[0041] In this embodiment, the main shaft 9 and the first rotating rod 10 and the second rotating rod 11 are coordinated through an intermittent mechanism. When the main shaft 9 rotates, it will drive the first rotating rod 10 and the second rotating rod 11 to rotate intermittently at a fixed angle. When the first rotating rod 10 rotates at a fixed angle, it will drive the first gear 3 to rotate at a fixed angle. When the first gear 3 rotates at a fixed angle, it will drive the electrode 6 below to rotate at a fixed angle. When the second rotating rod 11 rotates, it will drive the piston 23 to move back and forth in the piston cylinder 21. The stacked airbag 7 is inflated and deflated by the reciprocating movement of the piston 23 in the piston cylinder 21. Therefore, the above-mentioned structural coordination can achieve that during the process of the main shaft 9 rotating at a fixed angle once, the electrode 6 moves upward and out of contact with the skin surface after the stacked airbag 7 is deflated. After that, after the electrode 6 rotates at a fixed angle once again, the stacked airbag 7 is inflated again, driving the electrode 6 to move downward and contact another skin surface. By repeating the fixed angle rotation of the main shaft 9, the position of the electrode 6 in contact with the skin can be continuously changed, thereby realizing the electrode signal collection requirement of automatically changing the position of the electrode 6 on the skin surface.

[0042] As a further solution of the present invention, the intermittent mechanism includes a driving wheel 29 fixed on the main shaft 9, a second gear 12 fixed on the first rotating rod 10 and a second driven wheel 15 fixed on the second rotating rod 11. The two sides of the driving wheel 29 respectively cooperate with the first driven wheel 14 and the second driven wheel 15 for transmission.

[0043] When the main shaft 9 rotates one circle, it will drive the driving wheel 29 to rotate one circle. The two sides of the driving wheel 29 are respectively cooperated with the first driven wheel 14 and the second driven wheel 15 for transmission. When the driving wheel 29 rotates one circle, it can first drive the second driven wheel 15 to rotate 90°, and then drive the first driven wheel 14 to rotate 90°. When the main shaft 9 rotates continuously, it can drive the second driven wheel 15 and the first driven wheel 14 to rotate intermittently, that is, drive the second rotating rod 11 and the first rotating rod 10 to rotate 90° respectively. When the second rotating rod 11 rotates, it will drive the piston 23 to reciprocate in the piston cylinder 21. Here, the second rotating rod 11 is driven to reciprocate once in the piston cylinder 21 during the process of rotating 90°, that is, the stacked airbag 7 is inflated and deflated once during the process of rotating the second rotating rod 11 by 90°, and the first rotating rod 10 is driven to rotate once at a fixed angle during the process of rotating 90°.

[0044] As a further solution of the present invention, the first gear mechanism includes a third gear 13 rotatably arranged on the housing 1 and a second gear 12 fixed on the first rotating rod 10, and the third gear 13 is meshed with the first gear 3 and the second gear 12 on both sides respectively.

[0045] In this embodiment, when the first rotating rod 10 rotates, it drives the second gear 12 to rotate. The third gear 13 is respectively engaged with the first gear 3 and the second gear 12 on both sides. When the second gear 12 rotates, it drives the third gear 13 to rotate. When the third gear 13 rotates, it drives the first gear 3 to rotate.

[0046] As a further solution of the present invention, the second linkage structure includes a third rotating rod 16 rotatably arranged on the shell 1, and the third rotating rod 16 and the second rotating rod 11 are coordinated through a second gear mechanism. When the second rotating rod 11 rotates, it will drive the third rotating rod 16 to rotate. A rotating wheel 19 is fixed on the third rotating rod 16, and a swing arm 20 is hinged on the rotating wheel 19. A connecting rod 22 is arranged between the swing arm 20 and the piston 23, and the two ends of the connecting rod 22 are hinged to the swing arm 20 and the piston 23 respectively.

[0047] In this embodiment, when the second rotating rod 11 rotates, it will drive the third rotating rod 16 to rotate. When the third rotating rod 16 rotates, it will drive the rotating wheel 19 to rotate. When the rotating wheel 19 rotates, it will drive the swing arm 20 to swing, thereby pulling the connecting rod 22 to move back and forth in the piston cylinder 21, driving the piston 23 to move back and forth in the piston cylinder 21. The reciprocating movement of the piston 23 in the piston cylinder 21 cooperates with the hose 24 to inflate and deflate the stacked airbag 7.

[0048] As a further solution of the present invention, the second gear mechanism includes a fourth gear 17 fixed on the second rotating rod 11 and a fifth gear 18 fixed on the third rotating rod 16 , and the fourth gear 17 is meshed with the fifth gear 18 .

[0049] In this embodiment, when the second rotating rod 11 rotates, it drives the fourth gear 17 to rotate. The engagement of the fourth gear 17 with the fifth gear 18 drives the fifth gear 18 to rotate, thereby driving the third rotating rod 16 to rotate.

[0050] As a further solution of the present invention, a pressure sensor 26 is fixedly installed at the bottom of the electrode 6 for detecting the pressure applied to the electrode 6 when it contacts the body.

[0051] In this embodiment, the pressure sensor 26 is connected to the PLC electrical signal in the external electromyograph 27, and the contact pressure between the electrode 6 and the skin is monitored in real time through the pressure sensor 26. When uneven pressure is detected, the PLC controls the motor 25 to adjust, change the position of the electrode 6 and the volume of the corresponding stacked airbag 7, and dynamically compensate for skin deformation.

[0052] As a further solution of the present invention, an electromyograph includes an electromyograph 27 , which is connected to a flexible fixing device for myoelectric electrodes via a wire 28 .

[0053] In this embodiment, the pressure sensor 26 and the motor 25 are connected to the PLC electrical signal provided in the electromyograph 27 through the wires 28 respectively.

[0054] The working principle of the invention is: when in use, an adhesive is applied to the bottom of the silicone pad 2, and the shell 1 is adhered to the skin surface through the silicone pad 2. The silicone pad 2 is a flexible material that can be deformed and can better fit the skin surface when in contact with the skin, and is not easy to fall off during human movement; an electrode 6 is provided under the cylinder 4, and the electrode 6 is attached to the body surface to detect the electrical signal generated during muscle contraction and analyze the functional state of the neuromuscular system. The interior of the cylinder 4 is sequentially provided with stacked airbags 7, springs 8 and a limit rod 5 fixed to the electrode 6 from top to bottom, and the shell 1 is provided with a device for charging and discharging the stacked airbags 7. The piston mechanism of the gas, since the stacked airbags 7 can be inflated and deflated, the inflation of the stacked airbags 7 will expand and squeeze the spring 8, and the spring 8 will be squeezed and transmit the squeezing force to the limit rod 5, driving the limit rod 5 to move downward in the cylinder 4, and then driving the electrode 6 to move downward and only press on the surface of the body, so that when the shell 1 is pasted on the surface of the body skin, the electrode 6 is non-rigidly fixed on the surface of the body, and the expansion or contraction of the stacked airbags 7 drives the spring 8 to expand and contract, so that the electrode 6 is flexibly fixed on the surface of the body. The flexible fixation makes it possible for the electrode 6 to be independently adjusted in displacement after the shell 1 is fixed, and dynamically compensate for the skin shape. The shell 1 is flexible and fixed so that it can be more comfortable to wear when in contact with the skin. In addition, a main shaft 9 is provided on the shell 1 for rotation. When the main shaft 9 rotates, it drives the first gear 3 to rotate at a fixed angle intermittently and inflate and deflate the stacked airbag 7 intermittently. One intermittent periodic action is that the stacked airbag 7 is deflated once, and then the first gear 3 rotates at a fixed angle once, and then the stacked airbag 7 is inflated again. That is, when the electrode 6 is attached to the surface of the body, the main shaft 9 is driven to rotate to drive the first gear 3 to rotate at a fixed angle intermittently. After the dynamic stacked airbag 7 is deflated, it drives the first gear 3 to rotate once at a fixed angle, and then the stacked airbag 7 is inflated again, so that the electrode 6 moves downward and is pressed against the skin surface. By repeating the above actions, the present invention monitors the contact pressure between the electrode 6 and the skin in real time by the pressure sensor 26 after the shell 1 is installed and the stacked airbag 7 is inflated. When the contact pressure is insufficient and the electrode 6 still cannot adhere to the surface of the body to collect electrical signals, the electrode 6 can perform active circular motion on the surface of the body to change the contact position with the body, and then after the shell 1 is installed, the electrode 6 has the function of autonomous position adjustment.

[0055] The above embodiments are exemplary rather than restrictive, so any technical solution that can be implemented in other specific forms without departing from the spirit or basic features of the present invention is included in the present invention.

Claims

1. A flexible fixing device for myoelectric electrodes, comprising a housing, characterized in that: A silicone pad is fixed to the bottom of the shell, a first gear is rotatably arranged in the shell, a cylinder is fixed on the first gear, an electrode is arranged below the cylinder, and a stacked airbag, a spring, and a limit rod fixed to the electrode are sequentially arranged inside the cylinder from top to bottom, wherein the stacked airbag is fixed to the top wall inside the cylinder, and the two ends of the spring are respectively fixed to the stacked airbag and the limit rod, and a piston mechanism for inflating and deflating the stacked airbag is provided on the shell; The housing is provided with a main shaft for rotation, and the main shaft cooperates with the first gear and the stacked airbag via a first linkage structure. When the main shaft rotates, it drives the first gear to rotate at a fixed angle intermittently and intermittently inflate and deflate the stacked airbag. One intermittent periodic action is that the stacked airbag is deflated once, the first gear rotates at a fixed angle once, and then the stacked airbag is inflated again. The piston mechanism includes a piston cylinder fixed in the housing, a piston movably clamped in the piston cylinder, a hose connected to the stacked airbag fixed on the piston cylinder, and the piston reciprocates in the piston cylinder to inflate and deflate the stacked airbag; The first linkage structure includes a first rotating rod and a second rotating rod rotatably arranged on the housing, the main shaft and the first rotating rod and the second rotating rod cooperate with each other through an intermittent mechanism, and the main shaft rotates while driving the first rotating rod and the second rotating rod to rotate intermittently at a fixed angle, and when the first rotating rod rotates, the second rotating rod does not rotate, and when the second rotating rod rotates, the first rotating rod does not rotate, the first rotating rod and the first gear are transmitted through a first gear mechanism, and when the first rotating rod rotates, the first gear is driven to rotate, and the second rotating rod and the piston are cooperated through a second linkage structure, and when the second rotating rod rotates, the piston is driven to reciprocate in the piston cylinder; The intermittent mechanism includes a driving wheel fixed on the main shaft, a second gear fixed on the first rotating rod and a second driven wheel fixed on the second rotating rod, and the two sides of the driving wheel cooperate with the first driven wheel and the second driven wheel for transmission respectively; The second linkage structure includes a third rotating rod rotatably arranged on the shell, and the third rotating rod and the second rotating rod are coordinated through a second gear mechanism. When the second rotating rod rotates, the third rotating rod will be driven to rotate. A rotating wheel is fixed on the third rotating rod, and a swing arm is hinged on the rotating wheel. A connecting rod is arranged between the swing arm and the piston, and the two ends of the connecting rod are respectively hinged to the swing arm and the piston.

2. A flexible fixing device for myoelectric electrodes according to claim 1, characterized in that: A motor is fixedly mounted on the housing, an output end of the motor is connected to the main shaft through a coupling to drive the main shaft to rotate, and an encoder for measuring the rotation angle and speed of the motor is fixedly mounted on the motor.

3. A flexible fixing device for myoelectric electrodes according to claim 1, characterized in that: The first gear mechanism includes a third gear rotatably arranged on the housing and a second gear fixed on the first rotating rod. Both sides of the third gear are respectively meshed with the first gear and the second gear.

4. A flexible fixing device for myoelectric electrodes according to claim 1, characterized in that: The second gear mechanism includes a fourth gear fixed on the second rotating rod and a fifth gear fixed on the third rotating rod, and the fourth gear is meshed with the fifth gear.

5. The flexible fixing device for myoelectric electrodes according to claim 1, characterized in that: A pressure sensor is fixedly installed at the bottom of the electrode for detecting the pressure applied to the electrode when in contact with the body, so as to monitor the contact pressure between the electrode and the skin in real time.

6. An electromyograph, characterized in that: The invention comprises an electromyograph, which is connected to the myoelectric electrode flexible fixing device according to any one of claims 1 to 5 through a wire, wherein the pressure sensor and the motor are respectively connected to the PLC electrical signal provided in the electromyograph through a wire.

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