Electrode assembly and method with synergistic lock, hermetic seal, and stress isolation

Abstract

The application discloses an electrode assembly and method with cooperative locking, air-tight sealing and stress isolation functions, and relates to the technical field of nerve electrophysiological detection. The electrode assembly comprises a flexible rod carrier, a thin film winding layer, an adjustable air-tight valve body, and the like. The thin film winding layer is wound and fixed on the flexible rod carrier, the front end of the thin film winding layer forms a contact point area, the rear end of the thin film winding layer forms a terminal interface array, the adjustable air-tight valve body is arranged outside the thin film winding layer in an adjustable manner, the adjustable air-tight valve body has a drivable expansion end, and the drivable expansion end of the adjustable air-tight valve body can expand and press the thin film winding layer to the flexible rod carrier based on a driving action. The problems of insufficient depth adjustability of a high-density thin film electrode, difficulty in forming reliable air-tight performance, external stress easily affecting the functional area in the brain, and poor protection of the front and rear end interface areas in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of neurophysiological detection technology, and more specifically, to an electrode assembly and method with synergistic locking, gas sealing and stress isolation functions. Background Technology

[0002] Currently, stereotactic electroencephalography (SEEG) is a clinical technique that involves implanting several deep electrodes into the brain along a predetermined trajectory to achieve epileptic focus localization, functional area assessment, and stimulus mapping. Traditional SEEG electrodes typically employ a slender cylindrical structure with electrode contacts sparsely arranged along the electrode axis, and are positioned and fixed in the skull using bolts, guide screws, or fixators. With the increasing demands for precision in clinical neuroscience, traditional SEEG electrodes have significant limitations in terms of circumferential sampling density, local spatial resolution, and channel expandability along the same puncture trajectory, failing to meet the needs of high-throughput acquisition and refined micro-area network research.

[0003] Meanwhile, flexible thin-film electrodes typically consist of a polymer insulating layer such as polyimide, a metal conductive layer, and exposed electrode contacts, offering advantages such as thinness, high-density wiring, and high channel integration. Winding flexible thin-film electrodes onto the outer surface of a SEEG carrier has become an important technological direction for improving compatibility and resolution in recent years. However, directly winding high-density flexible films onto the carrier surface often results in uneven winding, susceptibility to frictional damage at the front contact area, susceptibility to contamination or breakage at the rear interface area, and difficulty in forming a reliable hermetically sealed structure between the carrier and the film. These issues severely affect the structural reliability of the electrodes and the quality of signal acquisition.

[0004] Furthermore, existing technologies typically employ integrated potting or fixation plugs to secure and seal electrodes. However, integrated potting methods result in irreversible positioning before curing, making it difficult to perform depth adjustments during surgery. After curing, if the colloid leaks along the membrane capillary, it can easily contaminate the interface area, leading to interface failure. Moreover, axial stresses such as external tension can be directly transmitted to functional areas within the brain through the membrane, thereby increasing the risk of tissue damage. Summary of the Invention

[0005] To address these issues, the present invention provides an electrode assembly and method with collaborative locking, airtightness, and stress isolation functions, thereby solving the problems of insufficient depth adjustability, difficulty in achieving reliable airtightness, susceptibility of external stress to affecting functional areas of the brain, and poor protection of the front and rear interface areas in the prior art for high-density thin-film electrodes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An electrode assembly with collaborative locking, hermetic sealing, and stress isolation functions includes: Flexible rod carrier; A thin film winding layer is wound and fixedly disposed on the flexible rod carrier, and the front end of the thin film winding layer forms a contact point area, and the rear end of the thin film winding layer forms a terminal interface array. An adjustable airtight valve body is disposed outside the thin film winding layer in an adjustable position, and the adjustable airtight valve body has a driveable expansion end. The driveable expansion end of the adjustable airtight valve body can expand and press the thin film winding layer against the flexible rod carrier based on the driving action.

[0007] Based on the above technical solution, the present invention is further described as follows: As a further aspect of the present invention The flexible rod carrier is configured as a flexible support rod; The thin film winding layer is provided with a wire layer and a plurality of electrode contacts connected through the wire layer, and the front end of the thin film winding layer is anchored to one end of the flexible rod carrier and spirally wound on the outer surface of the flexible rod carrier at a predetermined pitch. The thin film winding layer is formed sequentially by the flexible rod carrier to form a front-end functional area, a middle sliding handle area and a rear-end interface area. The front-end functional area of ​​the thin film winding layer forms a pair of contact points through a number of electrode contacts, and the number of electrode contacts are all located on the outer surface of the thin film winding layer corresponding to the pair of contact points.

[0008] As a further aspect of the present invention The electrode contacts in the contact area are distributed and extended in a direction close to the middle section of the slide handle area.

[0009] As a further aspect of the present invention, it also includes: A contact protection tube is loosely fitted and disposed outside the contact area; The inner diameter of the contact protection tube is larger than the outer diameter of the thin film winding layer after winding.

[0010] As a further aspect of the present invention The adjustable airtight valve body is slidably sleeved in the middle section of the flexible rod carrier and the thin film winding layer, and the adjustable airtight valve body can slide axially along the middle section of the sliding handle area.

[0011] As a further aspect of the present invention The adjustable airtight valve body includes a positioning base, a top pressure cap, and a flexible sealing ring; Both the positioning base and the top pressure cap have a central channel, and the positioning base has an inner cavity limiting space that communicates with its central channel. The flexible sealing ring is disposed in the inner cavity limiting space of the positioning base; The flexible rod carrier and the thin film winding layer are sequentially passed through the positioning base, the flexible sealing ring and the top pressure cap; The top pressure cap is screwed onto the positioning base, and after the top pressure cap is screwed on, an axial compressive force is applied to the flexible sealing ring along the flexible rod carrier. Under the action of the axial compressive force, the inner side of the flexible sealing ring expands radially toward the flexible rod carrier and the thin film winding layer.

[0012] As a further aspect of the present invention, it also includes: An interface protective sleeve is fitted onto the terminal interface array. The interface protective sleeve is configured as a tearable heat shrink tubing with a pre-cut peel line, and the front end of the interface protective sleeve ends at the rear of the adjustable airtight valve body.

[0013] An assembly method for an electrode assembly with cooperative locking, gas sealing, and stress isolation functions includes the following steps: Based on the flexible rod carrier, the front end of the thin film winding layer is anchored and spirally wound with constant tension to form a contact point area; At least based on the aforementioned provision of contact protection tubes over the contact area; Based on the flexible rod carrier and the pre-shuttle adjustable airtight valve body with the thin film winding layer; An interface protective sleeve is applied to the terminal interface array; Sliding adjustable airtight valve body; Furthermore, the adjustable airtight valve body is used to work together to achieve stacked locking, airtight sealing and stress isolation; Release the protective sleeve of the corresponding terminal interface array.

[0014] As a further aspect of the present invention, The process of anchoring the front end of the thin film winding layer and performing constant tension spiral winding based on the flexible rod carrier to form a contact point area specifically includes: The front end of the thin film winding layer is fixedly anchored to one end of the flexible rod carrier, and spirally wound along the outer surface of the flexible rod carrier with a predetermined pitch under constant tension, so that the front end of the flexible rod carrier and the thin film winding layer form a pair of contact point areas based on a number of electrode contacts. The pair of contact point areas are used as implantation ends for direct contact with brain tissue to achieve nerve signal acquisition. The provision of a contact protection tube over the contact area, at least based on the aforementioned provision, specifically includes: The contact protection tube is loosely fitted into the flexible rod carrier and the thin film winding layer. The contact protection tube covers the contact point area and the front functional area formed by winding, so as to provide physical protection for the contact point area during subsequent handling and pre-shuttle processes. The pre-shuttle adjustable airtight valve body based on the flexible rod carrier and the thin film winding layer specifically includes: Before the terminal interface array is fully unfolded or kept flat and controlled by the rigid support plate, the top pressure cap, the flexible sealing ring and the positioning base are sequentially inserted from the tail end of the flexible rod carrier and the thin film winding layer, and pushed to the middle section of the sliding handle area of ​​the flexible rod carrier and the thin film winding layer. For cases where the terminal interface array is too wide to be inserted axially, a positioning base with a side opening structure and a corresponding side opening flexible sealing ring can be used to complete the assembly in a side-clamping manner. The provision of an interface protection sleeve based on the terminal interface array specifically includes: The interface protective sleeve is fitted onto the rear unfolding area of ​​the thin film winding layer and the terminal interface array position, and the front end of the interface protective sleeve is controlled to stop behind the adjustable airtight valve body.

[0015] As a further aspect of the present invention, The sliding adjustable airtight valve body specifically includes: With the top pressure cap of the adjustable airtight valve body not tightened, the adjustable airtight valve body is axially slid along the middle section of the slide handle area of ​​the flexible rod carrier and the thin film winding layer to adapt to the determined implantation depth of the front functional area. The further integration of adjustable airtight valves to achieve stacked locking, airtight sealing, and stress isolation specifically includes: After reaching the target implantation depth, tighten the top pressure cap. Under the action of axial compression force, the flexible sealing ring expands radially inward, hugging the outer surface of the flexible rod carrier and the film winding layer, thereby working together to achieve locking, airtightness and stress isolation. The corresponding terminal interface array release interface protective sleeve specifically includes: The interface protective sleeve is peeled off along the pre-cut stripping line to expose the clean and uncontaminated terminal interface array, so as to connect the acquisition device and complete impedance and signal testing.

[0016] The present invention has the following beneficial effects: 1. This component and method, through the combination of a flexible rod carrier and a thin film winding layer, can achieve a high-density spiral arrangement of electrode contacts on a single implantation trajectory, significantly improving circumferential sampling density and local spatial resolution, avoiding the insufficient scalability of traditional SEEG electrode channels, and improving the overall functionality and practicality.

[0017] 2. This component, through the coordinated action of the positioning base, top pressure cap and flexible sealing ring in the adjustable airtight valve body, can achieve the tight locking of the flexible rod carrier and the film winding layer, the pressure sealing of the surface gaps and the dissipation and isolation of external axial stress. It integrates the three independent structures in the traditional solution into a single structure, which significantly improves the ease of operation and the stability and reliability of the structure.

[0018] 3. By setting up contact protection tubes, physical protection can be provided for the contact area during electrode assembly, handling and implantation, effectively avoiding friction damage; at the same time, by setting up interface protection sleeves, protection can be provided for the terminal interface array before locking is completed, improving the yield of finished products and the reliability of interface connection. Attached Figure Description

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The structures, proportions, sizes, etc., drawn in this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of an electrode assembly with collaborative locking, gas sealing and stress isolation functions provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the non-airtight state structure of the adjustable airtight valve body in the electrode assembly with collaborative locking, airtightness and stress isolation functions provided in the embodiment of the present invention.

[0022] Figure 3 This is one of the top pressure state structural diagrams of the adjustable airtight valve body in the electrode assembly with collaborative locking, airtightness and stress isolation functions provided in the embodiments of the present invention.

[0023] Figure 4 This is the second schematic diagram of the top pressure state structure of the adjustable airtight valve body in the electrode assembly with collaborative locking, airtightness and stress isolation functions provided in the embodiments of the present invention.

[0024] Figure 5 This is a schematic diagram of the protective state structure of the terminal interface array and the interface protective sleeve in the electrode assembly with collaborative locking, gas sealing and stress isolation functions provided in the embodiment of the present invention.

[0025] Figure 6This is a schematic diagram of the release state structure of the terminal interface array in the electrode assembly with collaborative locking, gas sealing and stress isolation functions provided in the embodiment of the present invention.

[0026] The attached diagram lists the components represented by each number as follows: 1. Flexible rod carrier; 2. Thin film winding layer; 3. Contact point area; 4. Contact protection tube; Adjustable airtight valve body 5: positioning base 51, top pressure cap 52, flexible sealing ring 53; Terminal interface array 6; Interface protective sleeve 7; Front-end functional area a, middle slider area b, back-end interface area c. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The terms "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0029] like Figures 1 to 6 As shown, this embodiment of the invention provides an electrode assembly with collaborative locking, airtightness, and stress isolation functions. It includes a flexible rod carrier 1, a thin film winding layer 2, a contact protection tube 4, an adjustable airtight valve body 5, and an interface protection sleeve 7. The flexible rod carrier 1, in conjunction with the thin film winding layer 2, achieves a high-density spiral arrangement of electrode contacts. Simultaneously, the adjustable airtight valve body 5 enables intraoperative adjustable collaborative locking, airtightness, and stress isolation functions. Furthermore, the contact protection tube 4 and the interface protection sleeve 7 provide zoned protection for the front and rear ends of the electrode, improving overall functionality and practicality. The specific configuration is as follows: Please refer to Figure 1 The flexible rod carrier 1 is configured as a slender flexible support rod, which serves as the winding substrate of the thin film electrode and the main axis of axial implantation support. The flexible rod carrier 1 may be made of polyurethane (PPU) soft rod material, and the diameter and length of the flexible rod carrier 1 are adapted to the target skull puncture trajectory, so as to stably achieve axial implantation path guidance and flexible fit through the flexible rod carrier 1.

[0030] Please continue to refer to this. Figure 1The thin film winding layer 2 is helically wound and fixed to the outer surface of the flexible rod carrier 1 as a thin film electrode; wherein, the thin film winding layer 2 includes a PI substrate film, the PI substrate film is provided with a conductive layer and a plurality of electrode contacts connected through the conductive layer; specifically, the front end of the thin film winding layer 2 is anchored to one end of the flexible rod carrier 1, and then helically wound on the outer surface of the flexible rod carrier 1 at a predetermined pitch, and the thin film winding layer 2 sequentially forms a front functional area a, a middle sliding handle area b, and a rear interface area c based on the flexible rod carrier 1, the thin film winding layer 2... The front-end functional area a forms a pair of contact point areas 3 through several electrode contacts. The several electrode contacts are all located on the outer surface of the thin film winding layer 2, corresponding to the pair of contact point areas 3, so as to directly contact the brain tissue after implantation to realize the acquisition of neural signals. The rear-end interface area c of the thin film winding layer 2 is provided with a terminal interface array 6. The terminal interface array 6 is a 4x8 Pad array that unfolds from the rear end of the thin film winding layer 2, so as to connect to external devices such as ZIF (zero insertion force) sockets, ACF (anisotropic conductive film) fixtures or test / acquisition connection modules through the terminal interface array 6, ensuring the overall functional adaptability.

[0031] As a preferred embodiment, please continue to refer to... Figure 1 The electrode contacts in the contact area 3 are distributed and extended towards the middle slide handle area to improve the effective sampling length and overall target coverage after entering the brain.

[0032] Please continue to refer to this. Figure 1 The contact protection tube 4 is loosely fitted onto the outside of the contact area 3, meaning that the inner diameter of the contact protection tube 4 is slightly larger than the outer diameter of the wound film layer 2. The contact protection tube 4 can be made of, but is not limited to, polytetrafluoroethylene (PTFE) material, to provide physical protection for the contact area 3 during electrode assembly and transportation. This significantly reduces external friction damage to the contact area 3. At the same time, the loose fit ensures that the contact area 3 and the contact protection tube 4 do not directly contact each other during assembly, effectively improving the overall functionality and practicality.

[0033] Please refer to Figures 1 to 4The adjustable airtight valve body 5 is slidably sleeved on the middle section of the flexible rod carrier 1 at position b. Specifically, the adjustable airtight valve body 5 includes a positioning base 51, a top-pressure cap 52, and a flexible sealing ring 53. Both the positioning base 51 and the top-pressure cap 52 have a central channel, and the positioning base 51 has an inner cavity limiting space connected to its central channel. The flexible sealing ring 53 may be made of, but is not limited to, medical-grade silicone material, and is disposed within the inner cavity limiting space of the positioning base 51. The flexible rod carrier 1 and the thin film winding layer 2 are sequentially inserted through the positioning base 51, the flexible sealing ring 53, and the top-pressure cap 52. The top-pressure cap 52 is screwed onto the end of the positioning base 51. After the screw is tightened, an axial compressive force is applied to the flexible sealing ring 53 along the flexible rod carrier 1. Under the action of the axial compressive force, the inner side of the flexible sealing ring 53 expands radially toward the flexible rod carrier 1 and the thin film winding layer 2, so as to hold the outer surface of the stack of the flexible rod carrier 1 and the thin film winding layer 2 tightly through the flexible sealing ring 53, thereby achieving further locking and fixing of the stack between the flexible rod carrier 1 and the thin film winding layer 2. At the same time, the thin film winding layer 2 is pressed against the surface micro gaps of the flexible rod carrier 1, effectively forming a stable airtight interface that prevents cerebrospinal fluid leakage along the gaps. In addition, the soft buffering characteristics of the flexible sealing ring 53 can also be used to dissipate and isolate the external axial tensile load, blocking the transmission of external stress to the contact point area 3 inside the brain, significantly improving the overall functionality and practicality.

[0034] As another preferred embodiment, the adjustable airtight valve body 5 can slide axially along the middle section of the sliding handle area b of the flexible rod carrier 1 and the thin film winding layer 2 when the top pressure cap 52 is not tightened, so that the adjustable airtight valve body 5 can be adjusted and positioned in accordance with the implantation depth during the operation, and then effectively complete the locking, airtightness and stress isolation by tightening the top pressure cap 52 after the target depth is reached.

[0035] Please refer to Figure 1 , Figures 5 to 6The interface protective sleeve 7 is sleeved and disposed on the terminal interface array 6. Specifically, the interface protective sleeve 7 is a tearable heat shrink tubing with a pre-cut peel line, and the interface protective sleeve 7 may be made of, but is not limited to, fluorinated ethylene propylene (FEP) material. The front end of the interface protective sleeve 7 ends behind the adjustable airtight valve body 5, so as to provide quick-release protection for the terminal interface array 6 before the adjustable airtight valve body 5 is locked, so as to prevent the terminal interface array 6 from being contaminated or damaged during assembly and transportation. After the adjustable airtight valve body 5 is locked, the interface protective sleeve 7 is torn off along the pre-cut peel line to expose the clean and uncontaminated terminal interface array 6, and the ZIF socket or ACF fixture is connected to complete impedance and signal testing, thereby improving the overall functional compatibility.

[0036] As an optional implementation scheme of this embodiment, The flexible rod carrier 1 can also be replaced by a PPU soft rod with medical polyurethane, Pebax, PEEK thin rod, metal core with an outer insulating layer or other slender support suitable for implantation; The contact protection tube 4 can be replaced by a PTFE rigid tube with an FEP rigid tube, a PEEK short sleeve or other low-friction biocompatible rigid kit. The flexible sealing ring 53 can be made of medical silicone, fluororubber, thermoplastic elastomer, or an elastomer with equivalent deformation and sealing capabilities; the sealing cross section can be circular, elliptical, lip-shaped, or multi-lobed. The top pressure cap 52 can be a snap-on cap, a ratchet cap, or an eccentric locking structure, as long as it can apply axial pressure to the flexible sealing ring 53 and form a radial clamping effect. The interface protective sleeve 7 is not limited to FEP tearable heat shrink tubing; it can also be a peelable protective film, a two-piece removable sheath, or a low-residue encapsulation sleeve. The terminal interface array 6 can be replaced by a pad array, a flexible flat cable connector, a gold finger structure, or an interface form that is welded / pressed to a custom adapter board.

[0037] This invention also provides an assembly method for an electrode assembly with cooperative locking, gas sealing, and stress isolation functions, specifically including the following steps: S1: Based on the flexible rod carrier 1, the front end of the thin film winding layer 2 is anchored and spirally wound with constant tension to form the contact point area 3; The specific process is as follows: The front end of the thin film winding layer 2 is fixedly anchored to one end of the flexible rod carrier 1, and spirally wound along the outer surface of the flexible rod carrier 1 with a predetermined pitch under constant tension, so that the front end of the flexible rod carrier 1 and the thin film winding layer 2 form a pair of contact point areas 3 based on a number of electrode contacts. The pair of contact point areas 3 are used as implantation ends to directly contact brain tissue to realize nerve signal acquisition. S2: At least based on the aforementioned contact point area 3, a contact protection tube 4 is installed; The specific process is as follows: The contact protection tube 4 is loosely fitted into the flexible rod carrier 1 and the thin film winding layer 2. The contact protection tube 4 covers the contact point area 3 and the front end functional area a formed by winding, so as to provide physical protection for the contact point area 3 during subsequent handling and pre-shuttle process. S3: Based on the flexible rod carrier 1 and the thin film winding layer 2, a pre-shuttle adjustable airtight valve body 5 is used. The specific process is as follows: When the terminal interface array 6 has not been fully unfolded or is kept flat and controlled by the rigid support plate, the top pressure cap 52, the flexible sealing ring 53 and the positioning base 51 are sequentially inserted from the tail end of the flexible rod carrier 1 and the thin film winding layer 2 and pushed to the middle section of the sliding handle area b of the flexible rod carrier 1 and the thin film winding layer 2. In cases where the terminal interface array 6 is too wide to be axially inserted, a positioning base 51 with a side opening structure and a corresponding side opening flexible sealing ring 53 can be used to complete the assembly in a side-clamping manner. S4: Install an interface protective sleeve 7 based on the terminal interface array 6; The specific process is as follows: The interface protective sleeve 7 is fitted onto the rear unfolding area of ​​the thin film winding layer 2 and the terminal interface array 6, and the front end of the interface protective sleeve 7 is controlled to stop behind the adjustable airtight valve body 5. S5: Sliding adjustable airtight valve body 5; The specific process is as follows: With the top pressure cap 52 of the adjustable airtight valve body 5 not tightened, the adjustable airtight valve body 5 is axially slid along the middle section slide area b of the flexible rod carrier 1 and the thin film winding layer 2 to adapt to the determined implantation depth of the front functional area a. S6: Further, the adjustable airtight valve body 5 is used to complete the stacked locking, airtightness and stress isolation. The specific process is as follows: After reaching the target implantation depth, tighten the top pressure cap 52. Under the action of axial compression force, the flexible sealing ring 53 expands radially inward, hugging the outer surface of the flexible rod carrier 1 and the film winding layer 2, thereby achieving locking, airtightness and stress isolation in a coordinated manner. S7: Release the interface protective sleeve 7 corresponding to the terminal interface array 6; The specific process is as follows: After the adjustable airtight valve body 5 is locked, the interface protective sleeve 7 is peeled off along the pre-cut stripping line to expose the clean and uncontaminated terminal interface array 6, so as to connect the acquisition device and complete the impedance and signal test.

[0038] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An electrode assembly with collaborative locking, gas sealing, and stress isolation functions, characterized in that, include: Flexible rod carrier; A thin film winding layer is wound and fixedly disposed on the flexible rod carrier, and the front end of the thin film winding layer forms a contact point area, and the rear end of the thin film winding layer forms a terminal interface array. An adjustable airtight valve body is disposed outside the thin film winding layer in an adjustable position, and the adjustable airtight valve body has a driveable expansion end. The driveable expansion end of the adjustable airtight valve body can expand and press the thin film winding layer against the flexible rod carrier based on the driving action. The adjustable airtight valve body is slidably sleeved in the middle section of the flexible rod carrier and the thin film winding layer, and the adjustable airtight valve body can slide axially along the middle section of the sliding handle area. The adjustable airtight valve body includes a positioning base, a top pressure cap, and a flexible sealing ring; Both the positioning base and the top pressure cap have a central channel, and the positioning base has an inner cavity limiting space that communicates with its central channel. The flexible sealing ring is disposed in the inner cavity limiting space of the positioning base; The flexible rod carrier and the thin film winding layer are sequentially passed through the positioning base, the flexible sealing ring and the top pressure cap; The top pressure cap is screwed onto the positioning base, and after the top pressure cap is screwed on, an axial compressive force is applied to the flexible sealing ring along the flexible rod carrier. Under the action of the axial compressive force, the inner side of the flexible sealing ring expands radially toward the flexible rod carrier and the thin film winding layer.

2. The electrode assembly with cooperative locking, gas sealing and stress isolation functions according to claim 1, characterized in that, The flexible rod carrier is configured as a flexible support rod; The thin film winding layer is provided with a wire layer and a plurality of electrode contacts connected through the wire layer, and the front end of the thin film winding layer is anchored to one end of the flexible rod carrier and spirally wound on the outer surface of the flexible rod carrier at a predetermined pitch. The thin film winding layer is formed sequentially by the flexible rod carrier to form a front-end functional area, a middle sliding handle area and a rear-end interface area. The front-end functional area of ​​the thin film winding layer forms a pair of contact points through a number of electrode contacts, and the number of electrode contacts are all located on the outer surface of the thin film winding layer corresponding to the pair of contact points.

3. The electrode assembly with cooperative locking, gas sealing and stress isolation functions according to claim 2, characterized in that, The electrode contacts in the contact area are distributed and extended in a direction close to the middle section of the slide handle area.

4. The electrode assembly with cooperative locking, gas sealing and stress isolation functions according to claim 2, characterized in that, Also includes: A contact protection tube is loosely fitted and disposed outside the contact area; The inner diameter of the contact protection tube is larger than the outer diameter of the thin film winding layer after winding.

5. The electrode assembly with cooperative locking, gas sealing and stress isolation functions according to claim 2, characterized in that, Also includes: An interface protective sleeve is fitted onto the terminal interface array. The interface protective sleeve is configured as a tearable heat shrink tubing with a pre-cut peel line, and the front end of the interface protective sleeve ends at the rear of the adjustable airtight valve body.

6. A method for assembling an electrode assembly with cooperative locking, gas sealing, and stress isolation functions as described in claim 5, characterized in that, Specifically, the steps include the following: Based on the flexible rod carrier, the front end of the thin film winding layer is anchored and spirally wound with constant tension to form a contact point area; At least based on the aforementioned provision of contact protection tubes over the contact area; Based on the flexible rod carrier and the pre-shuttle adjustable airtight valve body with the thin film winding layer; An interface protective sleeve is applied to the terminal interface array; Sliding adjustable airtight valve body; Furthermore, the adjustable airtight valve body is used to work together to achieve stacked locking, airtight sealing and stress isolation; Release the protective sleeve of the corresponding terminal interface array.

7. The assembly method of the electrode assembly with cooperative locking, gas sealing and stress isolation functions according to claim 6, characterized in that, The process of anchoring the front end of the thin film winding layer and performing constant tension spiral winding based on the flexible rod carrier to form a contact point area specifically includes: The front end of the thin film winding layer is fixedly anchored to one end of the flexible rod carrier, and spirally wound along the outer surface of the flexible rod carrier with a predetermined pitch under constant tension, so that the front end of the flexible rod carrier and the thin film winding layer form a pair of contact point areas based on a number of electrode contacts. The pair of contact point areas are used as implantation ends for direct contact with brain tissue to achieve nerve signal acquisition. The provision of a contact protection tube over the contact area, at least based on the aforementioned provision, specifically includes: The contact protection tube is loosely fitted into the flexible rod carrier and the thin film winding layer. The contact protection tube covers the contact point area and the front functional area formed by winding, so as to provide physical protection for the contact point area during subsequent handling and pre-shuttle processes. The pre-shuttle adjustable airtight valve body based on the flexible rod carrier and the thin film winding layer specifically includes: Before the terminal interface array is fully unfolded or kept flat and controlled by the rigid support plate, the top pressure cap, the flexible sealing ring and the positioning base are sequentially inserted from the tail end of the flexible rod carrier and the thin film winding layer, and pushed to the middle section of the sliding handle area of ​​the flexible rod carrier and the thin film winding layer. For cases where the terminal interface array is too wide to be inserted axially, a positioning base with a side opening structure and a corresponding side opening flexible sealing ring can be used to complete the assembly in a side-clamping manner. The provision of an interface protection sleeve based on the terminal interface array specifically includes: The interface protective sleeve is fitted onto the rear unfolding area of ​​the thin film winding layer and the terminal interface array position, and the front end of the interface protective sleeve is controlled to stop behind the adjustable airtight valve body.

8. The assembly method of the electrode assembly with cooperative locking, gas sealing and stress isolation functions according to claim 7, characterized in that, The sliding adjustable airtight valve body specifically includes: With the top pressure cap of the adjustable airtight valve body not tightened, the adjustable airtight valve body is axially slid along the middle section of the slide handle area of ​​the flexible rod carrier and the thin film winding layer to adapt to the determined implantation depth of the front functional area. The further integration of adjustable airtight valves to achieve stacked locking, airtight sealing, and stress isolation specifically includes: After reaching the target implantation depth, tighten the top pressure cap. Under the action of axial compression force, the flexible sealing ring expands radially inward, hugging the outer surface of the flexible rod carrier and the film winding layer, thereby working together to achieve locking, airtightness and stress isolation. The corresponding terminal interface array release interface protective sleeve specifically includes: The interface protective sleeve is peeled off along the pre-cut stripping line to expose the clean and uncontaminated terminal interface array, so as to connect the acquisition device and complete impedance and signal testing.

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