Electrode fixing device

Abstract

The utility model discloses an electrode fixing device, comprising a fixed base, a locking assembly and a base cover plate stacked in sequence, the fixed base comprising a receiving cavity with upper and lower openings; the locking assembly is arranged in the receiving cavity, the locking assembly comprises a locking upper cover, a locking lower cover and a sliding locking member, the locking upper cover and the locking lower cover are positioned with each other, the locking upper cover and the locking lower cover are both provided with a clearance groove for the electrode to pass through, the sliding locking member is arranged between the locking upper cover and the locking lower cover, and can be moved transversely at the clearance groove, so as to realize the switching between the clamping state of the sliding locking member horizontally clamping the electrode to be positioned and the loosening state of releasing the electrode to be positioned; the base cover plate is clamped with the fixed base, and a clamping gap is formed above the locking assembly, so as to realize the longitudinal clamping of the electrode to be positioned when the electrode to be positioned is located between the base cover plate and the locking assembly. The electrode fixing device can clamp the electrode to be positioned horizontally and longitudinally, and firmly fix the electrode.

Description

Technical Field

[0001] The utility model belongs to the field of medical equipment, and in particular relates to an electrode fixing device. Background Art

[0002] With the development of medical technology, medical devices are implanted in the human body during some surgeries to achieve the purpose of treatment or detection. Deep Brain Stimulation (DBS) is a type of implantable neurostimulation system, which also includes implantable cerebral cortical stimulation (CNS), implantable spinal cord stimulation (SCS), implantable vagus nerve stimulation (VNS), etc. Taking the deep brain stimulation system as an example, it mainly includes a pulse generator, electrodes, extension wires implanted in the body, and a charging device and program control device outside the body. The electrode is connected to the pulse generator, and the pulse generated by the pulse generator is transmitted to a specific nerve part to generate electrical stimulation, thereby restoring the normal human function of the corresponding part. During the electrode implantation surgery, the doctor generally determines the target position of the patient's brain through a three-dimensional stereo positioning device, opens a skull hole in a suitable skull part according to the target position, and inserts the electrode wire through the skull hole to the corresponding target position. The electrode is fixed at this position with a fixing device.

[0003] The utility model patent application with publication number CN 209333015U discloses an intracranial electrode fixing seat, which belongs to the technical field of implantable medical systems, and includes a base fixed to the skull and a cover body installed on the base. The base is annular, and an orientation-adjustable fixing plate is installed in the ring. The fixing plate is provided with an electrode fixing hole, and a threading groove extending from the electrode fixing hole to the edge of the fixing plate is provided; one side of the cover body is movably connected to the base through a rotating mechanism, and the other side is locked with the base through a locking assembly to press the fixing plate; the bottom of the cover body and the base are both provided with a threading groove for accommodating the electrode wire to pass through. The base is movably connected to the cover body through the rotating mechanism, that is, the base and the cover body are integrally arranged, and only one installation is required. When the electrode needs to be disassembled and installed later, the cover body only needs to be opened along the rotating mechanism. Since the cover body is still connected to the base, the risk of falling and the risk of falling off during long-term implantation are reduced. At the same time, the threading groove can prevent the cover body from pressing the electrode wire when it is buckled.

[0004] However, the fixing device disclosed in the above utility model patent will produce a large displacement during the fixing process, and the electrode can still move in the skull for a period of time after the operation, resulting in a poor stimulation effect due to the electrode displacement.

[0005] The utility model patent application with publication number CN219680636U discloses an electrode locking structure, including a fixing part with a mounting hole; a clamping part located in the mounting hole, the interior of which is suitable for the electrode to pass through; and a pressing part that is inserted into the clamping part so that the clamping part clamps the electrode. The electrode locking structure of the utility model clamps and fixes the electrode by the clamping part, and then the pressing part is inserted into the clamping part so that the clamping part clamps the electrode. The fixing device disclosed in the above utility model patent has insufficient positioning accuracy and is relatively complicated to operate. Utility Model Content

[0006] The utility model provides an electrode fixing device, which can clamp the electrode to be positioned in the horizontal direction and the vertical direction, and fix the electrode more stably.

[0007] The present invention provides an electrode fixing device, comprising a fixing base, a locking assembly and a base cover plate stacked in sequence, wherein:

[0008] The fixed base includes a receiving cavity with upper and lower openings;

[0009] The locking assembly is arranged in the accommodating cavity, and the locking assembly comprises a locking upper cover, a locking lower cover and a sliding locking member, wherein the locking upper cover and the locking lower cover are positioned with each other, and the locking upper cover and the locking lower cover are both provided with a clearance groove for the electrode to pass through, and the sliding locking member is arranged between the locking upper cover and the locking lower cover, and can be laterally moved at the clearance groove, so as to realize the switching between the clamping state of the sliding locking member laterally clamping the electrode to be positioned and the loosening state of releasing the electrode to be positioned;

[0010] The base cover is clamped with the fixed base and forms a clamping gap above the locking assembly so as to achieve longitudinal clamping of the electrode to be positioned when the electrode to be positioned is located between the base cover and the locking assembly.

[0011] The present invention forms a relatively firm clamping by means of horizontal clamping of the sliding locking piece and vertical clamping of the base cover plate and the locking assembly, thereby effectively preventing the electrode from shifting.

[0012] Preferably, the locking lower cover is provided with a slide groove and a positioning block;

[0013] The sliding locking member includes a clamping portion and a limiting portion, wherein the clamping portion is located at the clearance groove and is arranged opposite to the inner wall of the clearance groove, and is used to clamp the electrode to be positioned, and the limiting portion moves along the slide groove and is limited by the positioning block;

[0014] When the limiting portion is engaged with the positioning block, a clamping space is formed between the clamping portion and the inner wall of the clearance groove to clamp the electrode to be positioned, so that the sliding locking piece is in a clamping state; when the limiting portion leaves the positioning block, the clamping portion moves away from the inner wall of the clearance groove to release the electrode to be positioned, so that the sliding locking piece is in a released state.

[0015] The present invention can form a reliable locking structure by clamping the limiting part and the positioning block, and effectively prevent the sliding locking piece from accidentally opening under the influence of external forces such as vibration.

[0016] Preferably, the locking lower cover is provided with a first limit stop rib and a second limit stop rib which are arranged opposite to each other, the second limit stop rib is step-shaped, the first limit stop rib and the second limit stop rib form the slide groove, and when in the clamping state, the second limit stop rib is in conflict with the limit portion.

[0017] The second limiting rib provided by the present invention abuts against the limiting portion to form another reliable limiting structure, which effectively locks the sliding locking member to avoid accidental sliding.

[0018] Preferably, in the clamping state, the distance between the clamping portion and the inside of the clearance groove is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped. Setting a reasonable distance is conducive to clamping the electrode to be clamped.

[0019] Preferably, a boss is provided on the limiting portion;

[0020] The locking lower cover is provided with a limiting groove;

[0021] When the sliding locking member is in a released state, the boss is limited in the limiting groove, and when the sliding locking member is in a clamping state, the clamping portion is clamped on the inner wall of the giving way groove.

[0022] The present invention utilizes the matching relationship between the boss and the limiting groove to ensure that the sliding locking member is in a relatively stable loosened state, which is beneficial for the electrode to be positioned to pass through.

[0023] Preferably, the sliding locking member is provided with a circular hole, and the locking upper cover is provided with an adjustment hole, the adjustment hole is adapted to the position of the circular hole, and the sliding locking member is placed in a clamping state or a loosening state by adjusting the position of the circular hole. Since the clamping state and the loosening state can be switched by simply adjusting the position of the circular hole, the operation is simple.

[0024] Preferably, the locking assembly is embedded in the accommodating cavity, the locking assembly is circumferentially provided with limiting teeth, and the accommodating cavity is provided with limiting columns, and the circumferential positioning of the locking assembly and the accommodating cavity is achieved through the cooperation of the limiting teeth and the limiting columns.

[0025] The present invention is provided with limiting teeth on the circumference of the locking upper cover and the locking lower cover. The tooth shape can be circular teeth, arc teeth, curved teeth, square teeth, straight teeth and other structural forms. A limiting column is provided in the accommodating cavity. The limiting tooth limiting column is stuck between the limiting teeth, thereby preventing the locking upper cover and the locking lower cover from rotating.

[0026] Preferably, at least two electrode guide grooves are provided in the circumferential direction of the fixed base, and the electrode guide grooves are used to fix the electrodes to be positioned.

[0027] Preferably, the fixing base is further provided with two screw fixing holes. The present invention fixes the fixing base to the opening of the skull through screws through the screw fixing holes.

[0028] Preferably, the locking upper cover and the locking lower cover are snap-connected via a snap-fit ​​structure.

[0029] Preferably, the clamping gap is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention utilizes the lateral movement of the sliding locking member in the make way groove to laterally clamp the electrode to be positioned inside the make way groove, and at the same time, through the clamping gap between the base cover plate and the locking assembly, the electrode to be positioned is longitudinally clamped. Due to the synergistic effect of the transverse clamping and the longitudinal clamping, the firmness of the electrode to be positioned is increased, the risk of electrode displacement is reduced, and the accuracy of electrode positioning is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of an electrode fixing device provided in a specific embodiment of the utility model;

[0033] Figure 2 A schematic diagram of the structure of a fixed base provided in a specific embodiment of the utility model;

[0034] Figure 3 A schematic diagram of the structure of a locking assembly provided in a specific embodiment of the utility model;

[0035] Figure 4 This is a structural schematic diagram of a locking assembly in a clamping state provided by a specific embodiment of the utility model, wherein: Figure 4 (a) is a schematic diagram of the front structure of the locking assembly in the clamping state. Figure 4 (b) is a schematic diagram of the combined structure of the sliding locking member and the locking lower cover in the clamping state. Figure 4 (c) is a schematic diagram of the reverse structure of the locking assembly in the clamping state;

[0036] Figure 5This is a structural schematic diagram of a locking assembly in a released state provided by a specific embodiment of the utility model, wherein: Figure 5 (a) is a schematic diagram of the front structure of the locking assembly in the loosened state. Figure 5 (b) is a schematic diagram of the combined structure of the sliding locking member and the locking lower cover in the loosened state;

[0037] Figure 6 A cross-sectional view of an electrode fixing device provided in a specific embodiment of the utility model.

[0038] Among them, the fixed base 1, the accommodating cavity 1-1, the limiting column 1-2, the electrode guide groove 1-3, the screw fixing hole 1-4, the locking component 2, the locking cover 2-1, the first clearance groove 2-1-1, the positioning long buckle 2-1-2, the adjustment hole 2-1-3, the locking cover edge 2-1-4, the sliding locking piece 2-2, the limiting part 2-2-1, the boss 2-2-2, the clamping part 2-2-3, the clamping The end face 2-2-3-1, the circular hole 2-2-4, the locking lower cover 2-3, the positioning block 2-3-1, the slide groove 2-3-2, the first limiting rib 2-3-3, the second limiting rib 2-3-4, the limiting groove 2-3-5, the second giving way groove 2-3-6, the locking lower cover edge 2-3-6-1, the limiting tooth 2-4, the top surface of the locking assembly 2-5, the base cover plate 3, and the bottom surface 31 of the base cover plate. DETAILED DESCRIPTION

[0039] The present invention will be further described and illustrated below in conjunction with the accompanying drawings and specific implementation methods.

[0040] The specific embodiment of the utility model provides an electrode fixing device, such as Figure 1 As shown, it includes a fixed base 1, a locking assembly 2 and a base cover plate 3 which are stacked in sequence.

[0041] The locking assembly 2 provided in the specific embodiment of the utility model is arranged in the accommodating cavity 1-1, and the base cover plate 3 provided in the specific embodiment of the utility model is clamped with the fixed base 1, and a clamping gap is formed above the locking assembly 2, so that the electrode to be positioned can be longitudinally clamped when the electrode to be positioned is located between the base cover plate 3 and the locking assembly 2.

[0042] In a specific embodiment, the locking assembly 2 provided by the specific embodiment of the utility model is embedded in the accommodating cavity 1-1, and the locking assembly 2 is provided with limiting teeth 2-4 in the circumferential direction, and the accommodating cavity 1-1 is provided with limiting posts 1-2. The circumferential positioning of the locking assembly 2 and the accommodating cavity 1-1 is achieved through the cooperation of the limiting teeth 2-4 and the limiting posts 1-2. The limiting teeth 2-4 can be circular teeth, arc teeth, curved teeth, square teeth, straight teeth, etc. The mutually matching tooth structures limit the horizontal circumferential rotation movement of the locking assembly.

[0043] like Figure 2 As shown, the cover fixing base 1 provided in the specific embodiment of the utility model comprises a receiving cavity 1 - 1 with upper and lower openings, and the electrode to be positioned can pass through the receiving cavity 1 - 1 .

[0044] In a specific embodiment, if Figure 2 As shown, the fixed base 1 provided by the specific embodiment of the utility model is provided with at least two electrode guide grooves 1-3 in the circumferential direction, and the electrode guide grooves 1-3 are used to fix the electrodes to be positioned, and the fixed base 1 is also provided with two screw fixing holes 1-4. The present invention fixes the fixed base 1 to the opening of the skull through screw fixing holes 1-4.

[0045] like Figure 3 As shown, the locking assembly 2 includes a locking upper cover 2-1, a sliding locking member 2-2 and a locking lower cover 2-3, wherein the locking upper cover 2-1 and the locking lower cover 2-3 are positioned relative to each other, and the locking upper cover 2-1 and the locking lower cover 2-3 are both provided with a clearance groove for the electrode to pass through, and the clearance groove is constructed by a first clearance groove 2-1-1 and a second clearance groove 2-3-6, and the first clearance groove 2-1-1 and the second clearance groove 2-3-6 overlap, and the sliding locking member 2-2 is arranged between the locking upper cover 2-1 and the locking lower cover 2-3, and can move horizontally at the clearance groove, so that the sliding locking member 2-2 can horizontally clamp the electrode to be positioned in the clamped state, and the cover sliding locking member 2-2 can release the electrode to be positioned in the released state.

[0046] In a specific embodiment, if Figure 3 As shown, the locking lower cover 2-3 provided in the specific embodiment of the utility model is provided with a slide groove 2-3-2 and a positioning block 2-3-1. The sliding locking member 2-2 provided in the specific embodiment of the utility model includes a clamping portion 2-2-3 and a limiting portion 2-2-1. The clamping portion 2-2-3 is located at the give way groove and is arranged opposite to one side of the inner wall of the give way groove for clamping the electrode to be positioned. One side of the inner wall of the give way groove includes a locking upper cover edge 2-1-4 and a locking lower cover edge 2-3-6-1. At the same time, the limiting portion 2-2-1 moves along the slide groove 2-3-2 and is limited by the positioning block 2-3-1.

[0047] In a specific embodiment, if Figure 3 As shown, the limiting portion 2-2-1 provided in the specific embodiment of the utility model is provided with a boss 2-2-2; the locking lower cover 2-3 provided in the specific embodiment of the utility model is provided with a limiting groove 2-3-5, when the sliding locking member is in a loosened state, the boss 2-2-2 is limited in the limiting groove 2-3-5, when the sliding locking member is in a clamping state, the boss 2-2-2 is stuck on the other side of the inner wall of the giving groove.

[0048] like Figure 4 (a) Figure 4 (b) and Figure 4 As shown in (c), when the limiting portion 2-2-1 provided in the specific embodiment of the utility model is engaged with the positioning block 2-3-1, a clamping space is formed between the clamping portion 2-2-3 and one side of the inner wall of the clearance groove to clamp the electrode to be positioned, so that the sliding locking member 2 is in a clamping state.

[0049] In one embodiment, return Figure 3 and Figure 4 (b) The locking lower cover 2-3 provided in the specific embodiment of the utility model is also provided with a first limit stop rib 2-3-3 and a second limit stop rib 2-3-4 which are arranged relatively, and the second limit stop rib 2-3-4 is step-shaped, and the first limit stop rib 2-3-3 and the second limit stop rib 2-3-4 form a slide groove 2-3-2, and when in a clamping state, the second limit stop rib 2-3-4 is in conflict with the limit portion 2-2-1, so as to firmly limit the sliding locking member to prevent it from moving up and down.

[0050] In a specific embodiment, if Figure 4 As shown in (a) and 5(a), the sliding locking member 2-2 provided in the specific embodiment of the utility model is provided with a circular hole 2-2-4, and the locking upper cover 2-1 is provided with an adjustment hole 2-1-3, and the adjustment hole 2-1-3 is adapted to the position of the circular hole 2-2-4. By adjusting the position of the circular hole 2-2-4, the sliding locking member 2-2 is driven to slide in the slide groove 2-3-2, so that the sliding locking member 2-2 is in a clamped state or a loosened state. The utility model can easily adjust the clamped and loosened states by adjusting the circular hole 2-2-4 through the adjustment hole 2-1-3.

[0051] In a specific embodiment, if Figure 4 As shown in (c), the locking upper cover 2-1 and the locking lower cover 2-3 provided in the specific embodiment of the utility model are snap-connected by means of the positioning long buckle 2-1-2.

[0052] like Figure 5 (a) and Figure 5 As shown in (b), when the limiting portion 2-2-1 provided in the specific embodiment of the utility model leaves the positioning block 2-3-1, the clamping portion 2-2-3 moves away from one side of the inner wall of the clearance groove to release the electrode to be positioned, so that the sliding locking member is in a loosened state.

[0053] In a specific embodiment, when in the clamping state, the distance between the clamping portion and the inside of the clearance groove is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped. Figure 6As shown, the distance D2 between the end face of the clamping portion and the inner wall of the clearance groove is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped. At this time, the electrode to be positioned is in a transverse clamping state. The distance D2 is smaller than the electrode diameter, so the electrode to be positioned is clamped and locked by the locking end face, and a slight deformation occurs, increasing the friction force. As a result, the electrode can be more firmly locked on the fixed base.

[0054] In a specific embodiment, the clamping gap provided by the specific embodiment of the utility model is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped. In one embodiment, the return Figure 6 The gap between the bottom surface 31 of the base cover plate and the top surface 2-5 of the locking assembly is the clamping gap D1, which is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped. Since the gap between the bottom surface of the base cover plate and the top surface of the locking assembly is smaller than the electrode diameter, the electrode is pressed by the base cover plate and slightly deformed, increasing the friction force. As a result, the electrode can be locked on the fixed base for a second time.

[0055] The advantages of the utility model are as follows: 1. It has a locking assembly to fix the electrode once, reducing the risk of electrode displacement during surgery. 2. The locking assembly has a first buckle mechanism and a second buckle mechanism, and the locking mechanism is added to increase the firmness of the electrode locking and reduce the risk of electrode displacement during surgery.

[0056] The method for using the electrode fixing device provided by the utility model includes:

[0057] 1. Open the skull.

[0058] 2. Place the fixed base (1) and secure it with screws.

[0059] 3. Push the electrode straight to the designated location of the brain (the electrode should be placed in the center of the fixed base as much as possible).

[0060] 4. Place the locking assembly (2) (the locking assembly is in a loosened state at this time, and the electrode is passed through the locking assembly 2 and the opening on one side of the clearance groove, and the electrode is required to be as close to the locking assembly as possible).

[0061] 5. Use the lever to extend into the circular hole 2-2-4 of the sliding locking member, and push the sliding locking member 2-2 to the right to lock the electrode to be positioned, thus achieving a primary locking state.

[0062] 6. Bend the electrode and fix the bent electrode in the electrode guide groove 1-3 of the base.

[0063] 7. Cover the base cover plate 3 so that the electrode to be positioned is fixed between the bottom surface of the base cover plate 3 and the top surface of the locking assembly 2 to achieve a secondary locking state.

Claims

1. An electrode fixing device, characterized in that: It includes a fixed base, a locking assembly and a base cover plate stacked in sequence, wherein: The fixed base includes a receiving cavity with upper and lower openings; The locking assembly is arranged in the accommodating cavity, and the locking assembly comprises a locking upper cover, a locking lower cover and a sliding locking member, wherein the locking upper cover and the locking lower cover are positioned with each other, and the locking upper cover and the locking lower cover are both provided with a clearance groove for the electrode to pass through, and the sliding locking member is arranged between the locking upper cover and the locking lower cover, and can be laterally moved at the clearance groove, so as to realize the switching between the clamping state of the sliding locking member laterally clamping the electrode to be positioned and the loosening state of releasing the electrode to be positioned; The base cover is clamped with the fixed base and forms a clamping gap above the locking assembly so as to achieve longitudinal clamping of the electrode to be positioned when the electrode to be positioned is located between the base cover and the locking assembly.

2. The electrode fixing device according to claim 1, characterized in that: The locking lower cover is provided with a slide groove and a positioning block; The sliding locking member includes a clamping portion and a limiting portion, wherein the clamping portion is located at the clearance groove and is arranged opposite to the inner wall of the clearance groove, and is used to clamp the electrode to be positioned, and the limiting portion moves along the slide groove and is limited by the positioning block; When the limiting portion is engaged with the positioning block, a clamping space is formed between the clamping portion and the inner wall of the clearance groove to clamp the electrode to be positioned, so that the sliding locking piece is in a clamping state; when the limiting portion leaves the positioning block, the clamping portion moves away from the inner wall of the clearance groove to release the electrode to be positioned, so that the sliding locking piece is in a released state.

3. The electrode fixing device according to claim 2, characterized in that: The locking lower cover is provided with a first limiting retaining rib and a second limiting retaining rib which are arranged opposite to each other, the second limiting retaining rib is step-shaped, the first limiting retaining rib and the second limiting retaining rib form the sliding groove, and when in a clamping state, the second limiting retaining rib is in conflict with the limiting portion.

4. The electrode fixing device according to claim 3, characterized in that: When in the clamping state, the distance between the clamping portion and the inside of the clearance groove is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped.

5. The electrode fixing device according to claim 2, characterized in that: The limiting portion is provided with a boss; The locking lower cover is provided with a limiting groove; When the sliding locking member is in a released state, the boss is limited in the limiting groove, and when the sliding locking member is in a clamping state, the boss is clamped on the other side of the inner wall of the giving way groove.

6. The electrode fixing device according to claim 2, characterized in that: The sliding locking member is provided with a circular hole, and the locking upper cover is provided with an adjusting hole, the adjusting hole is adapted to the position of the circular hole, and the sliding locking member is placed in a clamping state or a loosened state by adjusting the position of the circular hole.

7. The electrode fixing device according to claim 1, characterized in that: The locking assembly is embedded in the accommodating cavity. The locking assembly is circumferentially provided with limiting teeth. A limiting column is provided in the accommodating cavity. The circumferential positioning of the locking assembly and the accommodating cavity is achieved through the cooperation of the limiting teeth and the limiting column.

8. The electrode fixing device according to claim 1, characterized in that: The fixed base is provided with at least two electrode guide grooves in the circumferential direction, and the electrode guide grooves are used to fix the electrodes to be positioned.

9. The electrode fixing device according to claim 1, characterized in that: The locking upper cover and the locking lower cover are snap-connected via a snap-fit ​​structure.

10. The electrode fixing device according to claim 1, characterized in that: The clamping gap is between 1 / 2 and 3 / 4 of the diameter of the electrode to be clamped.

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