Nerve stimulator assembly implanted into skull

Abstract

The utility model discloses a nerve stimulator assembly implanted into a skull, and belongs to the technical field of medical instruments. The nerve stimulator assembly implanted into the skull comprises a stimulator with a through hole, a fixing base and a fixing piece, the fixing base comprises a base plate and a limiting table arranged on the base plate, and the stimulator is detachably connected with the fixing base; the fixing column penetrates through the through hole to be fixedly held with the limiting table. According to the nerve stimulator assembly implanted into the skull, the stimulator and the fixed base can be fixedly connected, and the stimulator and the fixed base are prevented from being disengaged and losing efficacy.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a neurostimulator assembly implanted in the skull. Background Technology

[0002] Implantable neurostimulation systems consist of a stimulator and a fixation base, with the stimulator implanted into the skull via the fixation base. In daily life activities such as walking and running, both the stimulator and the fixation base are subject to random vibrations or impacts, which can cause the stimulator to detach and fail from the fixation base.

[0003] Therefore, there is an urgent need for a neurostimulator assembly that can be implanted in the skull to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a neurostimulator assembly for implantation in the skull, which can achieve a fixed connection between the stimulator and the fixation base to prevent detachment and failure.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A neurostimulator assembly implanted in the skull, comprising:

[0007] The stimulator has a through hole;

[0008] The fixed base includes a base plate and a limiting stage disposed on the base plate, and the stimulator and the fixed base are detachably connected;

[0009] A fixing post passes through a through hole to be fixed to the limiting platform.

[0010] In some possible implementations, the limiting stage includes a connecting portion extending upward from the substrate and a limiting portion connected to the connecting portion, the fixing post passing through the limiting stage, and the limiting portion limiting the fixing post.

[0011] In some possible implementations, the fixing post includes a shaft portion and a first limiting flange disposed at one end of the shaft portion. The shaft portion passes through the through hole and the limiting platform, and the first limiting flange engages with the limiting portion to limit and fix the fixing post.

[0012] In some possible implementations, the fixing base further includes a receiving cavity formed between the substrate and the limiting stage. There are two limiting portions, which are arranged opposite each other and form a strip-shaped gap. The fixing post is positioned at a first preset angle so that the first limiting flange passes through the through hole and the gap into the receiving cavity. An external torque drives the fixing post to a second preset angle so that at least a portion of the first limiting flange faces the side of the limiting portion, thereby limiting the first limiting flange and the limiting portion in a first direction, where the first direction is the axial direction of the shaft portion.

[0013] In some possible implementations, the first limiting flange is provided with a locking protrusion, and during the rotation of the fixing post from a first preset angle to a second preset angle, the locking protrusion and the lower surface of the limiting part are interference-fitted.

[0014] In some possible implementations, the card protrudes from the upper surface of the first limiting flange and is located on both sides of the shaft portion.

[0015] In some possible implementations, the limiting part is provided with a slot. When the fixing post is driven to a second preset angle by an external torque, the locking protrusion is received in the slot, and at this time the fixing post and the limiting platform are limited.

[0016] In some possible implementations, the through hole is an elongated hole, the first limiting flange is an elongated plate, the elongated plate can pass through the elongated hole and the strip-shaped gap respectively, and the first limiting flange corresponds to and cooperates with the two limiting parts.

[0017] In some possible implementations, the other end of the shaft is provided with a second limiting flange, such that a portion of the stimulator is clamped between the first limiting flange and the second limiting flange.

[0018] In some possible implementations, the second limiting flange has a mating hole on the side opposite to the first limiting flange. The mating hole is used to engage with an external structure to rotate the fixed column from a first preset angle to a second preset angle.

[0019] In some possible implementations, one end of the through hole is provided with a recess, and the second limiting flange is provided in the recess.

[0020] In some possible implementations, the second limiting flange has an adapter surface on the side opposite to the first limiting flange. When the fixing column rotates to the second preset angle, the adapter surface has an arc to smoothly connect with the surface of the stimulator.

[0021] In some possible implementations, a limiting groove is provided at the other end of the through hole, and the limiting platform is limited within the limiting groove.

[0022] In some possible implementations, the mounting base further includes a perimeter surrounding the substrate to form a mounting groove, in which the stimulator is disposed, and the perimeter is adapted to the shape of the stimulator.

[0023] In some possible implementations, at least one buckle is provided on the rim, and at least one groove is provided on the surface of the stimulator, with the buckle correspondingly fastened into the groove.

[0024] In some possible implementations, there are at least two through holes, at least two limiting platforms, and at least two fixing posts. The through holes and the limiting platforms are arranged in a one-to-one correspondence, and the through holes and the fixing posts are arranged in a one-to-one correspondence.

[0025] The beneficial effects of this utility model are:

[0026] This utility model provides a neurostimulator assembly for implantation in the skull. A fixing post passes through the through hole of the stimulator and is fixed to the limiting platform. The fixing post achieves a stable fixed connection between the stimulator and the fixing base, preventing the stimulator and the fixing base from detaching and failing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a nerve stimulator assembly implanted in the skull according to a specific embodiment of the present invention.

[0028] Figure 2 This is an exploded view of a neurostimulator assembly implanted in the skull according to a specific embodiment of this utility model.

[0029] Figure 3 yes Figure 2 Enlarged view of point A;

[0030] Figure 4 This is a schematic diagram of the stimulator provided in a specific embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the fastener provided in a specific embodiment of the present utility model;

[0032] Figure 6 yes Figure 2 Enlarged view of point B;

[0033] Figure 7 yes Figure 1 MM section view;

[0034] Figure 8 yes Figure 7 Enlarged view of point C.

[0035] In the picture:

[0036] 1. Stimulator; 11. Through hole; 12. Settling groove; 13. Groove; 14. Limiting groove; 15. Removal groove;

[0037] 2. Fixing base; 21. Base plate; 22. Limiting platform; 221. Slot; 222. Limiting part; 23. Gap; 24. Connecting part; 25. Surrounding edge; 27. Inverted buckle; 28. Ear plate; 29. ​​Receiving cavity;

[0038] 3. Fixing component; 31. Shaft portion; 32. First limiting flange; 321. Snap protrusion; 33. Second limiting flange; 331. Mating hole; 332. Adapting surface. Detailed Implementation

[0039] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] The technical field and related terms of the embodiments of this application are briefly described below.

[0043] Implantable medical systems include implantable neurostimulation systems, implantable cardiac stimulation systems (also known as pacemakers), implantable drug delivery systems (IDDS), and lead transfer systems. Examples of implantable neurostimulation systems include deep brain stimulation (DBS), cortical nerve stimulation (CNS), spinal cord stimulation (SCS), sacral nerve stimulation (SNS), and vagus nerve stimulation (VNS).

[0044] Implantable neurostimulation systems consist of a stimulator implanted in the patient's body (i.e., an implantable neurostimulator) and a programmed device placed outside the patient's body. In other words, the stimulator is a medical device, or medical devices include stimulators. Related neuromodulation techniques primarily involve stereotactic surgery to implant electrodes (e.g., electrode wires) at specific sites (target points) in the body's tissues. Discharge pulses are then delivered through these electrodes to the target points, modulating the electrical activity and function of corresponding neural structures and networks, thereby improving symptoms and alleviating pain.

[0045] As an example, a DBS includes an IPG (Implantable Pulse Generator), extension leads, and electrode leads. The IPG is connected to the electrode leads via the extension leads. The IPG is implanted in the patient's body, for example, in the chest or other internal locations.

[0046] As another example, DBS includes an IPG and electrode leads, with the IPG directly connected to the electrode leads. The IPG is implanted in the patient's head, for example, by creating a groove in the patient's skull and then placing the IPG in the groove. In this case, the IPG may not protrude from the outer surface of the skull, or it may protrude partially from the outer surface of the skull.

[0047] In this system, the IPG responds to programmed commands sent by a programmable device, relying on sealed batteries and circuits to provide controllable electrical stimulation therapy (or electrical stimulation energy) to tissues within the body. The IPG delivers one or more controllable specific electrical stimuli to specific areas of tissues within the body via electrode leads.

[0048] In some embodiments, the extension wire is used in conjunction with the IPG as a medium for transmitting electrical stimulation, thereby transmitting the electrical stimulation generated by the IPG to the electrode wire.

[0049] In some embodiments, electrical stimulation can be delivered in the form of a pulsed signal or a non-pulsed signal. For example, electrical stimulation can be delivered as a signal with various waveform shapes, frequencies, and amplitudes. Therefore, non-pulsed signal electrical stimulation can be a continuous signal, which can have a sinusoidal waveform or other continuous waveforms.

[0050] After receiving electrical stimulation from the IPG or extension leads, the electrode leads deliver the stimulation to specific areas of tissue within the body via multiple electrode contacts. The stimulator may have one or more electrode leads on one or both sides, with multiple electrode contacts on each lead. These contacts may be evenly or non-uniformly arranged circumferentially on the electrode leads. As an example, the electrode contacts may be arranged in a 4x3 array (a total of 12 contacts) circumferentially on the electrode leads. The electrode contacts may include stimulating electrode contacts and / or collecting electrode contacts. The electrode contacts may be in shapes such as sheet-like, ring-like, or dot-like.

[0051] In some embodiments, the stimulated tissue may be the patient's brain tissue, and the stimulated site may be a specific location within the brain tissue. Generally, the stimulated site differs depending on the patient's disease type, and the number of stimulation contacts (single-source or multi-source), the application of one or more specific electrical stimulation pathways (single-channel or multi-channel), and the stimulation parameters (values) also vary.

[0052] This application does not limit the applicable disease types, but can be any disease type applicable to deep brain stimulation (DBS), spinal cord stimulation (SCS), sacral nerve stimulation, gastric stimulation, peripheral nerve stimulation, or functional electrical stimulation. Among these, DBS can be used to treat or manage diseases including, but not limited to: spastic disorders (e.g., epilepsy), pain, migraines, mental illnesses (e.g., major depressive disorder (MDD)), bipolar disorder, anxiety disorders, post-traumatic stress disorder, mild depression, obsessive-compulsive disorder (OCD), behavioral disorders, mood disorders, memory disorders, mental state disorders, mobility disorders (e.g., essential tremor or Parkinson's disease), Huntington's disease, Alzheimer's disease, drug addiction, autism, or other neurological or psychiatric diseases and impairments.

[0053] In this embodiment of the application, when the programmable device and the stimulator establish a programmable connection, the programmable device can be used to adjust one or more stimulation parameters of the stimulator (or one or more stimulation parameters of the pulse generator, with different stimulation parameters corresponding to different electrical stimuli). Alternatively, the stimulator can sense the patient's electrophysiological activity to collect electrophysiological signals, and the collected electrophysiological signals can be used to continue adjusting the stimulation parameters of the stimulator to achieve closed-loop control (or adaptive adjustment) of the stimulation parameters.

[0054] Stimulation parameters may include at least one of the following: electrode contact identification for delivering electrical stimulation (e.g., electrode contact #2 and electrode contact #3), frequency (e.g., the number of electrical stimulation pulse signals per second, in Hz), pulse width (duration of each pulse, in μs), amplitude (generally expressed as voltage, i.e., the intensity of each pulse, in V), timing (e.g., continuous or bursty, bursty refers to discontinuous timing behavior composed of multiple processes), stimulation mode (including one or more of current mode, voltage mode, timed stimulation mode, and cyclic stimulation mode), physician control upper and lower limits (the range that the physician can adjust), and patient control upper and lower limits (the range that the patient can adjust independently).

[0055] In some embodiments, the stimulation parameters of the stimulator can be adjusted in current mode or voltage mode.

[0056] Programmable devices can include physician-controlled devices (i.e., devices used by physicians) and / or patient-controlled devices (i.e., devices used by patients). Physician-controlled devices are, for example, smart terminal devices such as tablets, laptops, desktop computers, and mobile phones equipped with programming software. Patient-controlled devices are, for example, smart terminal devices such as tablets, laptops, desktop computers, and mobile phones equipped with programming software; patient-controlled devices can also be other electronic devices with programming functions (e.g., chargers with programming functions, electrophysiological acquisition devices, etc.).

[0057] like Figures 1-8 As shown, this embodiment provides a neurostimulator assembly for implantation in the skull, including a stimulator 1, a fixation base 2, and a fixation member 3. The stimulator 1 and the fixation base 2 are detachably connected. The stimulator 1 has a through hole 11, which, exemplarily, is an elongated hole. The fixation base 2 includes a base plate 21 and a limiting platform 22 disposed on the base plate 21. The limiting platform 22 includes a connecting portion 24 extending upward from the base plate 21 and a limiting portion 222 connected to the connecting portion 24. The fixation base 2 also includes a receiving cavity 29 formed between the base plate 21 and the limiting platform 22. At least two limiting portions 222 are provided, and the two limiting portions 222 are disposed opposite each other to form a strip-shaped gap 23. The limiting portion 222 is provided with a slot 221.

[0058] The fixing member 3 includes a shaft portion 31 and a first limiting flange 32 located at one end of the shaft portion 31. The first limiting flange 32 has a locking protrusion 321, which is interference-fitted with the lower surface of the limiting portion 222, and the locking protrusion 321 can be received in the locking groove 221. At this time, the fixing member 3 is limited to the limiting platform 22. The first limiting flange 32 is a long strip plate, which can pass through the long hole and the strip-shaped gap 23 respectively. The first limiting flange 32 is correspondingly engaged with the two limiting portions 222.

[0059] During assembly, when the first limiting flange 32 can pass through the gap 23, the fixing member 3 is positioned at a first preset angle. When the fixing member 3 is installed and the fixing member 3 and the limiting platform 22 are positioned, the fixing member 3 is positioned at a second preset angle. For ease of description, exemplarily, the mounting direction of the stimulator 1 and the fixing base 2 is taken as the first direction, and the shaft portion 31 extends along the first direction. The stimulator 1 is mounted on the fixing base 2 along the first direction, so that the substrate 21 is located on one side of the stimulator 1 along the first direction. The shaft portion 31 of the fixing member 3 at the first preset angle passes through the through hole 11 of the stimulator 1 (such as a long strip hole) and the strip-shaped gap 23 on the limiting platform 22 of the fixing base 2 along the first direction, while the first limiting flange 32, i.e., the long strip plate, passes through the through hole 11 and the strip-shaped gap 23 and is received in the receiving cavity 29. Then, driven by external torque, the fixing member 3 is rotated to the second preset angle. During the rotation, at least a portion of the first limiting flange 32 is located directly below the limiting part 222, so that the first limiting flange 32 and the limiting part 222 are limited in the first direction. Furthermore, during the rotation of the fixing member 3 from the first preset angle to the second preset angle, the locking protrusion 321 on the first limiting flange 32 and the lower surface of the limiting part 222 are interference-fitted until the second preset angle is reached. At this point, the locking protrusion 321 on the first limiting flange 32 engages with the locking groove 221 of the limiting part 222 to limit the fixing member 3. In this embodiment, the fixing member 3 is limited circumferentially.

[0060] By limiting the first direction of the first limiting flange 32 with the limiting part 222 on the limiting platform 22, and by engaging the locking protrusion 321 on the first limiting flange 32 with the locking groove 221 of the limiting part 222, the first direction and circumferential limiting of the fixing member 3 and the limiting platform 22 are realized, ensuring the connection stability of the fixing member 3 and the fixing base 2, thereby ensuring the stability of the connection between the stimulator 1 and the fixing base 2 through the fixing member 3 and preventing loosening.

[0061] When the stimulator 1 is subjected to vibration or impact, the circumferential restraint of the fixing member 3 and the fixing base 2 maintains resistance, restricts the rotation of the fixing member 3, and maintains the locking effectiveness between the stimulator 1 and the fixing base 2. This prevents the fixing member 3 from rotating to the first preset angle when subjected to vibration or impact, which would cause it to detach from the fixing base 2 and the stimulator 1, thus reducing the probability of the stimulator 1 detaching from the fixing base 2 and the probability of implantation of the stimulator 1. During disassembly, external torque drives the fixing member 3 to rotate to the first preset angle, and the fixing member 3 is removed from the stimulator 1 and the fixing base 2, thereby ensuring convenient repeated disassembly and assembly of the stimulator 1 and the fixing base 2.

[0062] In other embodiments, one of the first limiting flange 32 and the limiting platform 22 is provided with a locking protrusion 321 and the other with a locking groove 221, with the locking protrusion 321 engaging with the locking groove 221. This engagement resists forces generated by random vibrations and impacts, and under external torque, the locking protrusion 321 and the locking groove 221 can engage or disengage. Exemplarily, the locking protrusion 321 is provided on the first limiting flange 32, and the locking groove 221 is provided on the limiting platform 22. The locking groove 221 is a through groove along the first direction for easy processing.

[0063] Specifically, at least two limiting parts 222 are provided with slots 221 respectively, and the first limiting flange 32 is provided with at least two protrusions 321. The protrusions 321 and the slots 221 correspond one-to-one. By increasing the number of limiting parts 222, the number of protrusions 321 and slots 221 paired for snapping is increased, thereby improving the snapping reliability.

[0064] The limiting platform 22 includes two limiting parts 222, which are arranged opposite each other to form a strip-shaped gap 23. The through hole 11 is an elongated hole, and the first limiting flange 32 is an elongated plate. The elongated plate can pass through the elongated hole and the strip-shaped gap 23 respectively. The locking protrusions 321 on both sides of the shaft part 31 of the elongated plate correspond to the locking grooves 221 on the two limiting parts 222. The above structure enables the elongated plate to pass through the elongated hole and the strip-shaped gap 23 when the fixing member 3 is located at a first preset angle; and the elongated plate cannot pass through the elongated hole and the strip-shaped gap 23 when the second preset angle is located. The structure is simple and reliable. Furthermore, the limiting part 222 is connected to the base plate 21 through the connecting part 24. The limiting part 222 and the connecting part 24 are arranged at an angle. In this embodiment, the two are arranged at a 90° angle. Two slots 221 are symmetrically arranged on two limiting parts 222. The fixing part 3 rotates 90° and switches between the first preset angle and the second preset angle, that is, the first preset angle and the second preset angle are 90° apart.

[0065] The other end of the shaft 31 is provided with a second limiting flange 33, so that part of the stimulator 1 is clamped between the first limiting flange 32 and the second limiting flange 33, thereby realizing the limiting of the stimulator 1 and the fixed base 2 by the fixing member 3 in the first direction.

[0066] One end of the through hole 11 is provided with a recess 12, and the second limiting flange 33 is provided in the recess 12, reducing the space occupied by the fixing member 3. Furthermore, the surface of the stimulator 1 is curved, and the side of the second limiting flange 33 facing away from the first limiting flange 32 is provided with an arc-shaped fitting surface 332. When the fixing member 3 is rotated to the second preset angle, that is, when the limiting platform 22 and the first limiting flange 32 are engaged, the fitting surface 332 can smoothly connect with the surface of the stimulator 1. On the one hand, it facilitates the installation of the nerve stimulator assembly implanted in the skull, preventing the nerve stimulator assembly implanted in the skull from having protrusions that could cause scratches or damage to the structures inside the skull. On the other hand, the fixing member 3 is located at the second preset angle, the fitting surface 332 on the second limiting flange 33 smoothly connects with the curved surface on the stimulator 1, and the engaging protrusion 321 on the first limiting flange 32 of the fixing member 3 and the engaging groove 221 on the limiting part 222 are all in one-to-one correspondence. The adapter surface 332 serves as an identifier, and the identifier fixing part 3 rotates to the second preset angle to prevent it from rotating incompletely or excessively.

[0067] The second limiting flange 33 has a mating hole 331 on the side opposite to the first limiting flange 32. The mating hole 331 is used to engage with an external structure to rotate the fastener 3 from a first preset angle to a second preset angle. By using the external structure, it is convenient to tighten or loosen the fastener 3. For example, the mating hole 331 is a hexagonal groove, and a hexagonal wrench engages with the hexagonal groove to facilitate the installation and removal of the fastener 3.

[0068] The fixing base 2 also includes a perimeter 25 around the substrate 21 to form a mounting groove. The stimulator 1 is disposed in the mounting groove. The perimeter 25 is adapted to the shape of the stimulator 1, thereby achieving circumferential positioning of the fixing base 2 and the substrate 21.

[0069] At least one buckle 27 is provided on the perimeter 25, and the stimulator 1 is provided with at least one groove 13. The buckles 27 are correspondingly positioned within the grooves 13, thereby enabling the stimulator 1 to be clamped between the buckle 27 and the bottom of the mounting groove, and limiting the side of the stimulator 1 by the buckles 27. The stimulator 1 and the fixing base 2 are fixed by the buckles 27 combined with the fixing member 3, which facilitates assembly and disassembly, further improves the connection reliability between the stimulator 1 and the fixing base 2, and further ensures the stability of the locking method between the stimulator 1 and the fixing base 2 under random vibration and impact conditions, increasing the implantation safety guarantee. In this embodiment, four buckles 27 are provided on the perimeter 25, that is, two buckles 27 are provided on each side of the perimeter 25, and two buckles 27 are provided on each side. Correspondingly, the stimulator 1 is provided with four grooves 13, two grooves 13 are provided on each side of the stimulator 1, and the four buckles 27 and the four grooves 13 are correspondingly positioned and fitted.

[0070] Optionally, the groove 13 is located on the side of the stimulator 1 to facilitate the connection between the inverted buckle 27 and the groove 13. Optionally, the inverted buckle 27 and the groove 13 are provided in a one-to-one correspondence, and multiple inverted buckles 27 and grooves 13 are provided. Optionally, there are at least two through holes 11, at least two limiting platforms 22, and at least two fixing members 3, with the through holes 11 and limiting platforms 22 and fixing members 3 being provided in a one-to-one correspondence. By increasing the number of through holes 11, limiting platforms 22, and fixing members 3, the connection reliability is improved. In this embodiment, there are two through holes 11, two limiting platforms 22, and two fixing members 3.

[0071] The other end of the through hole 11 is provided with a limiting groove 14, and the limiting platform 22 is limited within the limiting groove 14, which further realizes the limiting of the fixed base 2 and the limiting platform 22. Optionally, the limiting groove 14 is a rectangular groove and the limiting platform 22 is a rectangular platform, which facilitates manufacturing and installation.

[0072] For example, the assembly steps of the neurostimulator assembly implanted in the skull include: first, the stimulator 1 is inserted into the mounting groove of the fixing base 2, the limiting platform 22 of the fixing base 2 is inserted into the limiting groove 14 of the stimulator 1, and the outer periphery of the stimulator 1 is in contact with the periphery 25 of the fixing base 2; the stimulator 1 and the fixing base 2 are circumferentially limited; the buckle 27 is limited and engaged with the groove 13 on the side of the stimulator 1, so that the stimulator 1 is clamped between the base plate 21 of the fixing base 2 and the buckle 27 to form a limiting position. Subsequently, the first limiting flange 32 and the shaft portion 31 of the fixing member 3 pass sequentially through the through hole 11 of the stimulator 1 and the gap 23 between the two limiting portions 222 on the fixing base 2. At this time, the second limiting flange 33 is located on the side of the stimulator 1 away from the fixing base 2, and the first limiting flange 32 is located between the limiting portion 222 and the base plate 21, so that the limiting portion 222 and part of the stimulator 1 are clamped between the first limiting flange 32 and the second limiting flange 33; thus achieving the limiting of the fixing member 3, the fixing base 2, and the stimulator 1 along the axial direction of the fixing member 3, i.e., the first direction. Finally, using a hex wrench to tighten through the hexagonal groove, the mating surface 332 on the second limiting flange 33 and the curved surface on the stimulator 1 are matched. When the two are smoothly connected, the locking protrusion 321 on the first limiting flange 32 of the fixing member 3 and the locking groove 221 on the limiting portion 222 engage, thus achieving the circumferential limiting of the fixing member 3 and the fixing base 2.

[0073] Optionally, an ear plate 28 is provided extending outward from the perimeter 25. The ear plate 28 is connected to the skull by fasteners such as screws to fix the base 2 to the skull.

[0074] Optionally, the stimulator 1 is provided with a take-out groove 15 on the side exposed on the fixed base 2, so that the stimulator 1 can be taken out from the fixed base 2 through the take-out groove 15 for convenient operation.

[0075] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A neurostimulator assembly implanted in the skull, characterized in that, include: Stimulator (1) has a through hole (11); The fixed base (2) includes a base plate (21) and a limiting stage (22) disposed on the base plate (21), and the stimulator (1) and the fixed base (2) are detachably connected; A fixing post (3) passes through the through hole (11) to be fixed to the limiting platform (22).

2. The neurostimulator assembly implanted in the skull according to claim 1, characterized in that, The limiting platform (22) includes a connecting part (24) extending upward from the base plate (21) and a limiting part (222) connected to the connecting part (24). The fixing post (3) passes through the limiting platform (22), and the limiting part (222) is limited and fixed to the fixing post (3).

3. The neurostimulator assembly implanted in the skull according to claim 2, characterized in that, The fixing post (3) includes a shaft portion (31) and a first limiting flange (32) disposed at one end of the shaft portion (31). The shaft portion (31) passes through the through hole (11) and the limiting platform (22). The first limiting flange (32) engages with the limiting portion (222) to limit the fixing post (3).

4. The neurostimulator assembly implanted in the skull according to claim 3, characterized in that, The fixed base (2) further includes a receiving cavity (29) formed between the base plate (21) and the limiting stage (22). There are two limiting parts (222), which are arranged opposite to each other and form a strip-shaped gap (23). The fixed post (3) causes the first limiting flange (32) to pass through the through hole (11) and the gap (23) to the receiving cavity (29) at a first preset angle. An external torque drives the fixed post (3) to a second preset angle, so that at least a portion of the first limiting flange (32) faces the side of the limiting part (222), so that the first limiting flange (32) and the limiting part (222) are limited in a first direction, which is the axial direction of the shaft part (31).

5. The neurostimulator assembly implanted in the skull according to claim 4, characterized in that, The first limiting flange (32) is provided with a locking protrusion (321). During the process of the fixed column (3) rotating from the first preset angle to the second preset angle, the locking protrusion (321) and the lower surface of the limiting part (222) are interference-fitted.

6. The neurostimulator assembly implanted in the skull according to claim 5, characterized in that, The locking protrusion (321) is provided on the upper surface of the first limiting flange (32) and located on both sides of the shaft portion (31).

7. The neurostimulator assembly implanted in the skull according to claim 5, characterized in that, The limiting part (222) is provided with a slot (221). When the fixing post (3) is driven to the second preset angle by external torque, the card protrusion (321) is received in the slot (221). At this time, the fixing post (3) and the limiting platform (22) are limited.

8. The neurostimulator assembly implanted in the skull according to claim 4, characterized in that, The through hole (11) is an elongated hole, and the first limiting flange (32) is an elongated plate. The elongated plate can pass through the elongated hole and the strip-shaped gap (23) respectively. The first limiting flange (32) is correspondingly engaged with the two limiting parts (222).

9. The neurostimulator assembly implanted in the skull according to claim 4, characterized in that, The other end of the shaft (31) is provided with a second limiting flange (33), so that part of the stimulator (1) is sandwiched between the first limiting flange (32) and the second limiting flange (33).

10. The neurostimulator assembly implanted in the skull according to claim 9, characterized in that, The second limiting flange (33) is provided with a mating hole (331) on the side opposite to the first limiting flange (32). The mating hole (331) is used to cooperate with an external structure to make the fixed column (3) rotate from the first preset angle to the second preset angle.

11. The neurostimulator assembly implanted in the skull according to claim 9, characterized in that, One end of the through hole (11) is provided with a recess (12), and the second limiting flange (33) is provided in the recess (12).

12. The neurostimulator assembly implanted in the skull according to claim 11, characterized in that, The second limiting flange (33) has an adapter surface (332) on the side opposite to the first limiting flange (32). When the fixing column (3) rotates to the second preset angle, the adapter surface (332) has an arc so as to smoothly connect with the surface of the stimulator (1).

13. The neurostimulator assembly implanted in the skull according to claim 1, characterized in that, The other end of the through hole (11) is provided with a limiting groove (14), and the limiting platform (22) is limited within the limiting groove (14).

14. The neurostimulator assembly implanted in the skull according to claim 1, characterized in that, The fixed base (2) also includes a perimeter (25) around the base plate (21) to form a mounting groove, the stimulator (1) is disposed in the mounting groove, and the perimeter (25) is adapted to the shape of the stimulator (1).

15. The neurostimulator assembly implanted in the skull according to claim 14, characterized in that, At least one buckle (27) is provided on the rim (25), and at least one groove (13) is provided on the surface of the stimulator (1), with the buckle (27) correspondingly fastened in the groove (13).

16. The neurostimulator assembly implanted in the skull according to any one of claims 1-15, characterized in that, There are at least two through holes (11), at least two limiting platforms (22), and at least two fixing posts (3). The through holes (11) and the limiting platforms (22) are arranged in a one-to-one correspondence, and the through holes (11) and the fixing posts (3) are arranged in a one-to-one correspondence.

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