An electrode fixation device

Abstract

The utility model belongs to the field of implanting medical treatment, specifically relates to a kind of electrode fixing device, comprising: fixed plate piece, opening is suitable for the opening of electrode passing on it, the first side of the opening is equipped with first clamping boss, and the second side is equipped with limit slot;Rotary jaw, rotatably installed on fixed plate piece;Wherein, the two sides of the rotary jaw are equipped with second clamping boss, limit boss respectively;When second clamping boss is rotated to limit boss abuts in the second side of opening when towards first clamping boss, lock electrode;When limit boss is rotated and is clamped into the limit slot, unlock electrode.The utility model is through the simple joint design, and after considering electrode and lock core, lock core and base lock, it can be disassembled and re-locked, meet the demand of adjusting electrode when intraoperative detection.

Description

Technical Field

[0001] This utility model belongs to the field of implantable medical devices, specifically relating to an electrode fixation device. Background Technology

[0002] In the treatment of diseases such as Parkinson's disease, epilepsy, dystonia, and essential tremor, electrodes are usually implanted into a bone hole in the skull to collect signals or electrically stimulate target points in the brain. This procedure requires the installation of an electrode fixation device at the bone hole location so that the electrode contacts the target point and does not move.

[0003] Existing electrode fixation devices typically consist of three parts: a base, a locking cylinder, and a bone hole cover. During use, the base is first installed into the skull hole at the target site. After ensuring the locking cylinder aligns with the protrusion on the base, it is installed into the pre-drilled hole in the base. The electrode is then locked into the electrode fixation part, and finally, the bone hole cover is installed on the base. However, after the electrode is locked, the surgeon may need to loosen the electrode and readjust its position during intraoperative monitoring to meet surgical requirements. Utility Model Content

[0004] To address the technical problem of locking and unlocking electrodes in a fixing device, this utility model provides an electrode fixing device, comprising: a fixing plate having an opening suitable for the electrode to pass through, a first clamping boss on a first side of the opening, and a limiting groove on a second side; and a rotating jaw rotatably mounted on the fixing plate; wherein, a second clamping boss and a limiting boss are respectively provided on both sides of the rotating jaw; when the second clamping boss rotates toward the first clamping boss until the limiting boss abuts against the second side of the opening, the electrode is locked; when the limiting boss rotates and engages with the limiting groove, the electrode is unlocked.

[0005] Furthermore, the first clamping boss is a strip-shaped column protruding from the fixed plate and is on the same horizontal plane as the second clamping boss.

[0006] Furthermore, a gradually deepening slope is provided on one side of the limiting groove; the limiting boss 33 rotates along the slope and engages with the limiting groove.

[0007] Furthermore, the rotating jaw is provided with a spindle boss; the fixed plate is provided with a spindle through hole, and the spindle boss passes through the spindle through hole to make the rotating jaw rotate.

[0008] Furthermore, when the electrode is unlocked, the limiting boss is pressed, causing it to disengage from the second side of the opening along the direction perpendicular to the surface of the fixed plate, and slide into the limiting groove along the direction parallel to the surface of the fixed plate; the mandrel through hole is provided with through slots at both ends to accommodate the elastic deformation of the fixed plate when the electrode is unlocked.

[0009] Furthermore, the rotating jaw has a rotating shaft boss at the far end from the mandrel boss, and a fourth through hole is formed on the rotating shaft boss.

[0010] Furthermore, it also includes: a base, which has a snap-fit ​​groove for accommodating the fixing plate; the inner wall of the snap-fit ​​groove is uniformly provided with a plurality of columnar first flanges along the circumference, and the outer wall of the fixing plate is provided with a plurality of second flanges along the circumference, the second flanges being embedded in the gap between two adjacent first flanges to restrict the relative rotation between the fixing plate and the base.

[0011] Furthermore, the base includes: a first boss; the first boss has the snap-fit ​​groove and the limiting hole arranged sequentially along the axial direction inside, the diameter of the limiting hole being smaller than that of the snap-fit ​​groove, so as to limit the axial position of the fixing plate; the fixing plate is also provided with a plurality of first snap-fit ​​members, the first snap-fit ​​members passing through and hooking the bottom of the limiting hole to limit the axial movement of the fixing plate and the base.

[0012] Furthermore, the base also includes: a mounting platform located on the first protrusion; the mounting platform is provided with a plurality of first connecting parts to fix the base by fasteners; the upper surface of the mounting platform is provided with at least one first electrode groove, the first electrode groove extending from the edge of the mounting platform to the snap-fit ​​groove to guide the electrode into the opening.

[0013] Furthermore, it also includes: a bone hole cover, which is fixed to the base by a snap-fit ​​method and covers the snap-fit ​​groove.

[0014] The beneficial effects of this utility model are as follows: This utility model features a fixed plate with an electrode opening and a rotating jaw rotatably mounted on the fixed plate. When the device clamps the electrode, the electrode is locked by the abutting engagement of the limiting boss on the rotating jaw with the opening. Furthermore, the electrode is unlocked by rotating the limiting boss into the limiting groove on the fixed plate. This utility model, through a simple snap-fit ​​design, allows for the removal and relocking of the electrode and lock cylinder after locking, and the lock cylinder and base, thus meeting the needs of adjusting the electrode during intraoperative monitoring.

[0015] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. To make the foregoing objects, features and advantages of this invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the electrode fixing device of this utility model.

[0018] Figure 2 This is a front sectional view of the base of this utility model.

[0019] Figure 3 This is a top view of the base of this utility model.

[0020] Figure 4 This is a bottom view of the base of this utility model.

[0021] Figure 5 This is a structural schematic diagram of the fixing plate component of this utility model.

[0022] Figure 6 This is a top view of the rotating jaw of this utility model.

[0023] Figure 7 This is a left view of the rotating jaw of this utility model.

[0024] Figure 8 This is a front view of the rotating jaw of this utility model.

[0025] Figure 9 This is a top view of the lock cylinder in the locked state of this utility model.

[0026] Figure 10 This is a bottom view of the lock cylinder in the locked state of this utility model.

[0027] Figure 11 This is a top view of the lock cylinder in the unlocked state of this utility model.

[0028] Figure 12 This is a bottom view of the lock cylinder in the unlocked state of this utility model.

[0029] Figure 13 This is a front view of the lock cylinder in the locked state of this utility model.

[0030] Figure 14 This is a bottom view of the bone hole cover of this utility model.

[0031] In the picture:

[0032] 1. Base; 11. First boss; 111. Limiting hole; 112. Snap-fit ​​groove; 113. Third chamfer; 12. First flange; 13. Mounting platform; 131. First connecting part; 1311. First chamfer; 1312. First through hole; 1313. First blind hole; 132. Second connecting part; 1321. Second chamfer; 1322. Second through hole; 1323. Second blind hole; 133. Base groove; 134. Cover groove; 135. First rounded corner; 136. First electrode groove;

[0033] 2. Fixing plate; 21. Opening; 211. Opening surface; 212. Second rounded corner; 213. Third rounded corner; 22. First clamping boss; 23. Limiting groove; 24. Second flange; 25. Mandrel through hole; 251. Through slot; 26. First buckle; 261. First rib; 27. Third through hole;

[0034] 3. Rotating jaw; 31. Mandrel boss; 311. Fourth chamfer; 312. Second boss; 32. Second clamping boss; 321. Fixing surface; 322. Third flange; 33. Limiting boss; 331. Third blind hole; 34. Rotating shaft boss; 341. Fourth through hole; 35. Mating surface;

[0035] 4. Bone hole cover; 41. Second buckle; 411. Second rib; 42. Second electrode groove. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, 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.

[0037] In the treatment of brain diseases, electrode fixation devices are needed to implant electrodes into target sites in the brain and lock them in place before signal acquisition or electrical stimulation. Since intraoperative monitoring may require readjusting the electrodes to a more precise position, this embodiment provides an electrode fixation device. See [link to documentation]. Figures 1-14 The electrode fixing device consists of a base 1, a lock cylinder (including a rotatably connected fixing plate 2 and a rotating jaw 3), and a bone hole cover 4, to achieve a fixing device that allows the electrode to be locked and unlocked within the lock cylinder. For details, see... Figures 9-12The electrode fixing device also includes a fixing plate 2, which has an opening 21 suitable for the electrode to pass through. The first side of the opening 21 is provided with a first clamping boss 22, and the second side is provided with a limiting groove 23. A rotating jaw 3 is rotatably mounted on the fixing plate 2. The rotating jaw 3 has a second clamping boss 32 and a limiting boss 33 on its two sides respectively. When the second clamping boss 32 rotates toward the first clamping boss 22 until the limiting boss 33 abuts against the second side of the opening 21, the electrode is locked. When the limiting boss 33 rotates and engages with the limiting groove 23, the electrode is unlocked.

[0038] It should be noted that, for reference Figure 1 In this embodiment, the base 1 is described as the "bottom" and the bone hole cover 4 is installed "above" as the top.

[0039] As an optional implementation of base 1.

[0040] See Figure 2 The base 1 includes: a first boss 11 for installation in the bone hole, wherein a snap-fit ​​groove 112 and a limiting hole 111 are provided in sequence from top to bottom; a plurality of columnar first flanges 12 are evenly arranged circumferentially along the inner wall of the snap-fit ​​groove 112; and a mounting platform 13 protruding from the outer edge of the first boss 11 to snap onto the bone surface outside the bone hole.

[0041] Optional, see Figure 2 The locking groove 112 is used to accommodate the fixing plate 2. For ease of installation, in this embodiment, the first boss 11 and its internal locking groove 112 and limiting hole 111 are all cylindrical (other cylindrical structures can also be used based on treatment needs) to match the circular fixing plate 2. The locking groove 112 and the limiting hole 111 form a hollow through hole. The diameter of the limiting hole 111 is smaller than that of the locking groove 112, forming a stepped structure, so that the fixing plate 2 abuts against the bottom of the locking groove 112 and cannot move further downward, thereby limiting the axial position of the fixing plate 21. A third chamfer 113 is also provided on the periphery of the lower surface of the first boss 11 to guide the inner seat into the bone hole.

[0042] Optional, see Figure 2 and Figure 5The first flange 12 is used to mate with a plurality of second flanges 24 arranged circumferentially on the outer wall of the fixing plate 2. It should be noted that both the first flange 12 and the second flanges 24 are longitudinally cylindrical. The size of the second flange 24 is set so that it can be precisely inserted into the gap between two adjacent first flanges 12, thereby restricting the relative rotation between the fixing plate 2 and the base 1 after the fixing plate 2 is inserted into the locking groove 112. Preferably, the number of second flanges 24 can be less than the number of first flanges 12. In this embodiment, two sets of second flanges 24 are arranged on the periphery of the fixing plate 2, and the circumference can be inserted into the locking groove 112 in any direction. Therefore, the lock cylinder can also be moved out and readjusted for insertion, thereby meeting the requirements for adjusting the electrode angle and position.

[0043] Optional, see Figures 2-4 The mounting platform 13 is provided with a plurality of first connecting parts 131 near the edge and penetrating the mounting platform 13. In this embodiment, three first connecting parts 131 are provided to fix the base 1 to the bone surface by fasteners (e.g., screws). The first connecting parts 131 include, from top to bottom, the following: a first chamfer 1311, for screwing in and accommodating the nut to prevent the nut protrusion from damaging the scalp tissue; a first through hole 1312, for accommodating the screw rod; and a first blind hole 1313, for accommodating the screw rod and bone fragments generated when the screw is screwed in, the diameter of which is slightly larger than the diameter of the first through hole 1312 (e.g., about 0.5 mm larger).

[0044] Optional, see Figure 3 , Figure 4 , Figure 14 The mounting platform 13 is provided with a second connecting part 132 corresponding to the second buckle 41 on the bone hole cover 4 to fix the bone hole cover 4 to the base 1. The second connecting part 132 includes: a second through hole 1322, which is a through hole on the mounting platform 13 for accommodating the second buckle 41; a second chamfer 1321, located on the upper surface of the mounting platform 13 and connected to the second through hole 1322, for guiding the second buckle 41; and a second blind hole 1323, located on the lower surface of the mounting platform 13 and connected to the second through hole 1322, so that the second buckle 41 passes through the second through hole 1322 and engages with the second blind hole 1323 to lock the base 1 and the bone hole cover 4.

[0045] Optional, see Figure 2 , Figure 3 , Figure 4 A base groove 133 is provided at the connection between the lower surface of the mounting platform 13 and the connection point surrounding the first protrusion 11. When the curvature of the skull is small, the base groove 133 can provide deformation space between the first protrusion 11 and the mounting platform 13, thereby preventing the lock cylinder and the base 1 from failing to cooperate due to device deformation. See Figure 3 and Figure 14The upper surface of the mounting platform 13 is provided with an annular cover groove 134 passing through the second through hole 1322 for mating with the bone hole cover 4. The groove is slightly wider at the intersection with the second through hole 1322 to simplify the installation of the bone hole cover 4, while the remaining portion minimizes the clearance between the base 1 and the bone hole cover 4, preventing relative wobbling. See [link / reference]. Figure 2 and Figure 3 The upper surface of the mounting platform 13 is also provided with: a first rounded corner 135, located between the cover groove 134 and the snap-fit ​​groove 112; at least one first electrode groove 136, extending from the edge of the mounting platform 13 through the cover groove 134 and the first rounded corner 135 to the snap-fit ​​groove 112, the width of the groove is generally slightly narrower than the electrode, so that the distal end of the electrode is guided and snapped into the first electrode groove 136 through the first rounded corner 135, and the proximal end of the electrode is placed into the opening 21.

[0046] As an optional implementation of the fixing plate 2.

[0047] See Figure 5 The fixing plate 2 has an opening 21 suitable for the electrode to pass through. Specifically, the two opposite sides of the opening 21 are a first side and a second side, wherein the second side is set as an opening surface 211 perpendicular to the surface of the fixing plate 2, which cooperates with the limiting boss 33. See reference. Figure 9 The first side is connected to the fixing plate 2 by a third fillet 213, and the connecting section between the first side and the second side is connected to the fixing plate 2 by a second fillet 212. The third fillet 213 and the second fillet 212 are located on the upper surface of the fixing plate 2 to prevent excessive bending when the electrode is clamped in the opening 21.

[0048] Optional, see Figures 9-12 The lower surface of the fixing plate 2 has a first clamping boss 22 protruding from the plate surface near the third rounded corner 213. The first clamping boss 22 can be a strip-shaped column to cooperate with the second clamping boss 32 to clamp the electrode. The lower surface of the fixing plate 2 has a limiting groove 23 near the opening surface 211 to accommodate the limiting boss 33. The opening of the limiting groove 23 is slightly larger than the limiting boss 33, and the limiting groove 23 starts from the opening surface 211 and is provided with a gradually deepening slope to facilitate the insertion of the limiting boss 33. The deepest part of the slope is perpendicular to the abutment surface of the fixing plate 2, and the axial depth along the fixing plate 2 is 0.3mm to 6mm.

[0049] Optionally, multiple second flanges 24 are disposed on the outer wall of the fixing plate 2 along the circumferential direction for engaging with the first flange 12 to restrict the relative rotation between the fixing plate 2 and the base 1. In addition, the fixing plate 2 is also provided with several strip-shaped third through holes 27 near the second flanges 24, so that when the first flange 12 and the second flange 24 are engaged, the edge of the fixing plate 2 (i.e., at the second flange 24) subjected to compression has a certain elastic deformation space.

[0050] Optional, see Figure 5 and Figure 6 The fixed plate 2 is provided with a spindle through hole 25 near the second rounded corner 212, which cooperates with the spindle boss 31 on the rotating jaw 3 to realize the relative rotation of the rotating jaw 3 and the fixed plate 2. The two ends of the spindle through hole 25 are provided with through slots 251 extending radially therefrom, so as to accommodate the elastic deformation of the fixed plate 2 when locking or unlocking the electrode.

[0051] Optional, see Figure 5 The fixing plate 2 is provided with at least two first snap-fit ​​pieces 26, which can be located on the periphery of the fixing plate 2 and are in the form of downward hooks. The first snap-fit ​​pieces 26 are elastic and can be squeezed toward the center of the plate and pass through the limiting hole 111, and then hook outward to the bottom of the limiting hole 111 to restrict the axial movement of the fixing plate 2 and the base 1.

[0052] As an alternative implementation of the rotating jaw 3.

[0053] See Figures 6-8 The rotating jaw 3 has one end for connection to the fixed plate 2 and the other end for operation rotation. The rotating jaw 3 consists of a body, a spindle boss 31 located on the body at the axial connection end, second clamping bosses 32 and limiting bosses 33 located on both sides of the middle section of the body, and a rotating shaft boss 34 connected to the body at the operation rotation end. Figure 8 As shown, the bottom surface of the rotating jaw 3 is a one-piece molded plane and is located in the limiting hole 111 to prevent friction damage to the human body.

[0054] Optional, see Figure 6 The mandrel boss 31 can be cylindrical and protrude upwards towards the rotating jaw 3, so that it passes through the mandrel through hole 25 from below the fixed plate to allow the rotating jaw 3 to rotate on the fixed plate 2. Specifically, the front end of the mandrel boss 31 is provided with a fourth chamfer 311 and a second boss 312 in sequence. The diameter of the mandrel boss 31 is smaller than the diameter of the mandrel through hole 25, and the diameter of the second boss 312 is larger than the diameter of the mandrel through hole 25, so that the front end of the mandrel boss 31 is guided by the fourth chamfer 311 and squeezed through the through slot 251 to elastically enlarge and pass through the mandrel through hole 25, and then is engaged with the outside of the mandrel through hole 25 by the second boss 312.

[0055] Optional, see Figure 5 and Figure 6 The movement path of the second clamping boss 32 is within the opening 21 of the fixing plate 2, and it is on the same horizontal plane as the first clamping boss 22 to ensure the stability of the clamped electrode. Preferably, the surface of the second clamping boss 32 facing the first clamping boss 22 is the fixing surface 321, and a plurality of cylindrical third flanges 322 are evenly distributed on the fixing surface 321 to further prevent radial displacement of the clamped electrode.

[0056] Optional, see Figures 9-12 The limiting boss 33 starts from the surface opposite to the fixed surface 321 and gradually thickens towards the limiting groove 23 until its end, with the inclination matching the slope of the limiting groove 23. See [link to relevant documentation]. Figure 8 The thickness of the terminal can be 0.7mm to 4mm, and the thickness of the starting end can be 0.5mm to 2mm, ensuring that the thickness of the terminal is greater than that of the starting end. That is, when the limiting boss 33 abuts against the second side of the opening 21 to lock the electrode, the thickness of the abutting part is 0.2mm-2mm. The upper surface of the limiting boss 33 is provided with a recessed third blind hole 331, which facilitates pressing the limiting boss 33 downward, so that the limiting boss 33 is vertically offset from the opening surface 211, and then rotates horizontally along the slope to be inserted into the limiting groove 23 to unlock the electrode.

[0057] Optional, see Figure 6 , Figure 9 The rotating boss 34 protrudes towards the first side to abut against the first side when the electrode is locked, preventing the rotating jaw 3 from excessively rotating and squeezing the electrode. Furthermore, the rotating boss 34 has a fourth through hole 341, facilitating the use of a tool to rotate the rotating jaw 3 and lock the electrode. The rotating boss 34 is located horizontally within the locking groove 112. The lower surface (i.e., the mating surface 35) of the rotating boss 34 slides against the stepped structure of the locking groove 112 when the rotating jaw 3 rotates, providing support at both ends of the rotating jaw 3 and preventing damage or displacement of the rotating jaw 3 due to excessive pressure on the limiting boss 33.

[0058] As an alternative implementation method for locking and unlocking the lock cylinder.

[0059] Optional, Figure 9 , Figure 10 , Figure 13 The image shows the locked state of the fixed plate 2 and the rotating jaw 3. Figure 11 , Figure 12 The image shows the unlocked state of the fixed plate 2 and the rotating jaw 3. In the initial unlocked state, the limiting boss 33 is stationary in the limiting groove 23.

[0060] Optionally, after the electrode is placed in the opening 21, a tool is used to move the rotating shaft boss 34 through the fourth through hole 341, causing the rotating jaw 3 to rotate, that is, causing the second clamping boss 32 to rotate toward the first clamping boss 22. At this time, the limiting boss 33 slides from the limiting groove 23 along the slope to the opening 21. During the sliding process, the limiting boss 33 is elastically compressed with the limiting groove 23 due to the downward displacement of the slope. When the thicker end of the limiting boss 33 is separated from the slope, the elastic force is released and it abuts against the opening surface 211, thus completing the locking of the electrode.

[0061] Optionally, a tool can be used to press the third blind hole 331 on the limiting boss 33, causing the limiting boss 33 to move downwards until it disengages from the opening surface 211. Subsequently, it slides back into the limiting groove 23 along the slope of the limiting groove 23 due to inertia, thus unlocking the electrode. The simple locking and unlocking of the lock cylinder can meet the need for intraoperative fine-tuning of the radial position of the electrode in the opening 21.

[0062] As an alternative implementation of the bone hole cover 4.

[0063] Optional, see Figure 14 The lower surface of the bone hole cover 4 is provided with multiple second buckles 41, each corresponding to a second connecting part 132. The second buckles 41 engage with the second connecting parts 132 to fix the bone hole cover 4 on the base 1 and cover the locking groove 112 (i.e., seal the lock cylinder inside). A second rib 411 is provided at the connection between the second buckle 41 and the lower surface of the cover body of the bone hole cover 4 to increase the strength of the second buckle 41. The lower surface of the bone hole cover 4 is provided with a protrusion passing through the second buckle 41 to cooperate with the cover groove 134 on the mounting platform 13 to increase the tightness of the engagement. The bone hole cover 4 is provided with second electrode grooves 42 that correspond one-to-one with the first electrode grooves 136 to fix the electrodes and prevent compression.

[0064] The electrode fixing device of this utility model is used as follows: the first protrusion 11 of the base 1 is placed into the skull hole, the orientation of the first electrode groove 136 is adjusted according to the required lead-out direction of the electrode, and the fastener is passed through the first connecting part 131 to fix the base 1 to the bone surface; then the locking cylinder is inserted into the snap-fit ​​groove 112 according to the required electrode direction and the electrode is implanted, the distal end of the electrode is guided into the first electrode groove 136 through the first rounded corner 135, and the proximal end of the electrode is placed into the opening 21; then the locking cylinder is locked, and if adjustment is required, the locking cylinder is unlocked to adjust the position of the locking cylinder or the electrode; finally, the bone hole cover 4 is installed into the base 1 to complete the installation of the entire device.

[0065] Optionally, the base 1, fixing plate 2, rotating jaw 3 and bone hole cover 4 can be made of implant-grade polymer.

[0066] In summary, the electrode fixing device of this invention features a fixing plate 2 with an electrode opening 21 and a rotating jaw 3 rotatably mounted on the fixing plate. When the device clamps the electrode, the electrode is locked by the abutting engagement between the limiting boss 32 on the rotating jaw 3 and the opening 21. The electrode is unlocked by rotating the limiting boss 32 into the limiting groove 23 on the fixing plate 2. This invention, through a simple snap-fit ​​design, allows for the removal and relocking of the electrode and lock cylinder after locking, and the lock cylinder and base 1, meeting the needs for electrode adjustment during intraoperative monitoring. This facilitates precise positioning of target points for signal acquisition or stimulation during the treatment of brain diseases.

[0067] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0068] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0069] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0070] Based on the above-described preferred embodiments of this utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. That is, the technical scope of this utility model is not limited to the contents of the specification.

Claims

1. An electrode fixing device, characterized in that, include: A fixing plate (2) is provided with an opening (21) suitable for the electrode to pass through. The first side of the opening (21) is provided with a first clamping boss (22), and the second side is provided with a limiting groove (23). The rotating jaw (3) is rotatably mounted on the fixed plate (2); wherein, The rotating jaw (3) is provided with a second clamping boss (32) and a limiting boss (33) on both sides respectively; when the second clamping boss (32) rotates toward the first clamping boss (22) until the limiting boss (33) abuts against the second side of the opening (21), the electrode is locked; when the limiting boss (33) rotates and is inserted into the limiting groove (23), the electrode is unlocked.

2. The electrode fixing device as described in claim 1, characterized in that, The first clamping boss (22) is a strip-shaped column protruding from the fixed plate (2) and is on the same horizontal plane as the second clamping boss (32).

3. The electrode fixing device as described in claim 1, characterized in that, The limiting groove (23) has a gradually deepening slope on one side; The limiting boss (33) rotates along the slope and gets into the limiting groove (23).

4. The electrode fixing device as described in claim 1, characterized in that, The rotating jaw (3) is provided with a spindle boss (31); The fixed plate (2) is provided with a spindle through hole (25), and the spindle boss (31) passes through the spindle through hole (25) to make the rotating jaw (3) rotate.

5. The electrode fixing device as described in claim 4, characterized in that, When the electrode is unlocked, press the limiting boss (33) so that it moves away from the second side of the opening (21) in the direction perpendicular to the plate surface of the fixed plate (2) and slides into the limiting groove (23) in the direction parallel to the plate surface of the fixed plate (2). The mandrel through hole (25) has through slots (251) at both ends to accommodate the elastic deformation of the fixing plate (2) when the electrode is unlocked.

6. The electrode fixing device as described in claim 4, characterized in that, The rotating jaw (3) has a rotating shaft boss (34) at the far end from the spindle boss (31), and a fourth through hole (341) is provided on the rotating shaft boss (34).

7. The electrode fixing device as described in claim 1, characterized in that, Also includes: The base (1) has a snap-fit ​​groove (112) inside to accommodate the fixing plate (2); The inner wall of the snap-fit ​​groove (112) is uniformly provided with a plurality of columnar first flanges (12) along the circumference, and the outer wall of the fixing plate (2) is provided with a plurality of second flanges (24) along the circumference. The second flanges (24) are embedded in the gap between two adjacent first flanges (12) to restrict the relative rotation between the fixing plate (2) and the base (1).

8. The electrode fixing device as described in claim 7, characterized in that, The base (1) includes: a first boss (11); The first boss (11) has the snap-fit ​​groove (112) and the limiting hole (111) arranged sequentially along the axial direction inside. The diameter of the limiting hole (111) is smaller than that of the snap-fit ​​groove (112) to limit the axial position of the fixing plate (2). The fixing plate (2) is also provided with a plurality of first snap-fit ​​pieces (26), which pass through and hook the bottom of the limiting hole (111) to restrict the axial movement of the fixing plate (2) and the base (1).

9. The electrode fixing device as described in claim 8, characterized in that, The base (1) further includes: a mounting platform (13) located on the first boss (11); The mounting platform (13) is provided with a plurality of first connecting parts (131) to fix the base (1) by fasteners; The upper surface of the mounting platform (13) is provided with at least one first electrode groove (136), which extends from the edge of the mounting platform (13) to the snap-fit ​​groove (112) to guide the electrode into the opening (21).

10. The electrode fixing device as described in claim 7, characterized in that, Also includes: The bone hole cover (4) is fixed to the base (1) by a snap-fit ​​method and covers the snap-fit ​​groove (112).

Images