Device for fixing miniature medical feed-through flange
By designing a fixing device for the annular flange and cubic module, the problem of precise positioning and stable fixation of the micro medical feedthrough was solved, achieving high-precision detection and simplified operation, and reducing the defect rate and production cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-04-10
AI Technical Summary
Existing miniature medical feedthrough fixation devices have shortcomings in terms of accuracy, ease of operation, detection stability, and detection environment stability, resulting in large measurement errors, complex operation, and unstable detection.
A fixing device including an annular flange and an insulator was designed. Utilizing a cubic module and bolt structure, and through the cooperation of arc grooves and through holes, it achieves precise positioning and stable fixing of the micro medical feedthrough. The use of 316L stainless steel bolts and cubic modules made of polyoxymethylene material ensures the accuracy and stability of the fixture.
It improves the accuracy and stability of feedthrough testing in micro-medical devices, reduces measurement errors, simplifies the operation process, lowers the defect rate and production costs, and ensures the stability of the testing environment.
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Figure CN224099819U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of micro medical feedthrough flange, concretely is a device for fixing micro medical feedthrough flange. BACKGROUND
[0002] Micro medical feedthroughs play a key connection role in implantable electronic devices. For example, in a cardiac pacemaker, the feedthrough can connect the electronic circuit inside the pacemaker with the electrode outside. The electrode is used to sense the electrical signals of the heart and send electrical stimulation pulses to the heart, while the feedthrough ensures that these electrical signals can be accurately and stably transmitted without problems such as leakage or signal interference. In an implantable neurostimulator, the micro medical feedthrough can connect the control circuit of the stimulator with the electrode implanted near the nerve. Through the feedthrough, the stimulator can accurately send electrical pulses to the specific nerve for the treatment of neurological diseases such as Parkinson's disease and epilepsy.
[0003] Micro medical feedthroughs usually contain multiple metal pins. These pins are generally made of materials with good electrical conductivity and biocompatibility, such as platinum, titanium or certain special alloys. The diameter of the pins is usually between tens of microns and hundreds of microns, and the number of pins is determined according to the specific application requirements, which may be 2-10 or even more. The shape of the pin is generally an elongated cylinder, and its surface may be treated with special treatment such as polishing or coating. In order to prevent short circuit between pins and ensure isolation from biological tissue, the micro medical feedthrough will have an insulating package. The insulating material is usually selected from biocompatible ceramics, glass or high molecular polymers. For ceramic or glass packaging, the thickness may be tens of microns to hundreds of microns, and high molecular polymer packaging may be thinner. From the above description, it is not difficult to find that the size of the medical feedthrough is too small, and there are many difficulties in inspection and measurement, such as:
[0004] 1. Fixing accuracy problem: Because the size of the micro medical feedthrough is small, the pin pitch may only be a few hundred microns, and some existing fixtures cannot accurately position the feedthrough at the appropriate measurement position during the fixing process, which may cause measurement errors. For example, when measuring the length or pitch of the pin, due to the inaccurate positioning of the fixture, there may be tens of microns or even hundreds of microns of measurement deviation, which is unacceptable for high-precision micro medical feedthrough detection.
[0005] 2. Operation convenience and safety: The existing feedthrough measurement is relatively simple in the operation process, and is mostly through the method of placing on the ordinary platform and continuously clamping the flange with tweezers under the detection equipment to flip and view. Because the wire is soft and the flange is too thin, it is easy to deform the feedthrough due to improper force; and because the flange edge is too narrow, the tweezers head is difficult to contact with the flange in a large area, so that the feedthrough has the risk of falling due to slight shaking of the fingers, and as a result, in order to clamp the flange, the tweezers are squeezed tightly to prevent the feedthrough from falling, which in turn deforms the feedthrough.
[0006] 3. Insufficient detection stability: When detecting the micro medical feedthrough, it needs to be carried out under high-precision detection equipment such as microscope and image instrument. In the detection process, sufficient stable support needs to be provided without any slight displacement or vibration. Because this will cause the image to appear blurred or the measurement data to be inaccurate during the detection process. For example, when using the image instrument to detect the surface quality of the feedthrough pin, due to the insufficient stability of the clamp, the image captured by the image instrument may be shaken, and the pin surface cannot be clearly observed whether there are small scratches, cracks and other defects, which affects the accurate judgment of the quality of the feedthrough.
[0007] In the current situation of urgent demand for medical feedthrough, large-scale production of medical feedthrough has become inevitable. In this process, a device capable of reducing the defective rate, improving the work efficiency and improving the product quality is particularly important. Content of the utility model
[0008] To solve the technical problems in the background art, the utility model provides a device for fixing the flange of a micro medical feedthrough.
[0009] The technical scheme of the utility model is as follows:
[0010] A device for fixing the flange of a micro medical feedthrough, the feedthrough flange comprises an annular flange and an insulator mounted inside the annular flange, a signal probe group is inserted in the middle of the insulator, and the signal probe group comprises a plurality of cubic modules with the same shape;
[0011] A first arc-shaped groove and a second arc-shaped groove which are communicated along the length direction are formed at the top end of the cubic module, the axes of the two arc-shaped grooves coincide, and the radii are different, one of the arc-shaped grooves is matched with the size of the annular flange of the feedthrough flange, and the size of the other arc-shaped groove does not interfere with the signal probe group;
[0012] A through hole is formed at each of the two sides below the arc-shaped groove, the through hole is parallel to the axis of the arc-shaped groove, each through hole is divided into three hole sections along the axis, and the radii of the two end hole sections are greater than the radius of the middle hole section;
[0013] A plurality of cubic modules are connected by bolts inside the through hole, the arc-shaped grooves of the cubic modules are arranged in coincidence, and nuts are arranged at the ends of the bolts for cooperation, so that the spacing of the plurality of cubic modules can be adjusted.
[0014] The arc-shaped slot is centrally arranged.
[0015] The first arc-shaped slot and the second arc-shaped slot are of the same length, the first arc-shaped slot has a larger diameter than the second arc-shaped slot, and the diameter of the first arc-shaped slot is not greater than half the width of the cubic module.
[0016] The through hole is in clearance fit with the bolt, and the distance between the two through holes is not less than half the width of the cubic module.
[0017] The axes of the two through holes on the cubic module are symmetrical about the axis of the arc-shaped slot.
[0018] The hole sections at both ends of the through hole are of equal diameter, the sum of the lengths of the hole sections at both ends of the through hole is less than the length of the middle hole section, and the radius of the hole sections at both ends of the through hole is greater than 1.5 times the radius of the middle hole section.
[0019] Further, the middle hole section of the through hole of the cubic module away from the head of the bolt can also be provided with threads to cooperate with the bolt, thereby saving the nut.
[0020] When multiple cubic modules are connected, each cubic module can be arranged with the first arc-shaped slot close to each other, or arranged with the second arc-shaped slot close to each other, or arranged with the second arc-shaped slot of one cubic module close to the first arc-shaped slot of an adjacent cubic module.
[0021] The three-section structure of the through hole is designed to adapt to any of the above cubic module connection modes.
[0022] The beneficial effects of the utility model are as follows:
[0023] 1. The accuracy of micro medical feedthrough detection is improved, and the feedthrough does not displace during the detection process, thereby ensuring the accuracy of the measurement.
[0024] 2. Stable detection environment, providing a stable environment for micro medical feedthrough during detection. Whether under a microscope or an image instrument, the image blurring problem caused by jig shaking or vibration can be effectively reduced.
[0025] 3. Simple use, simple operation method, only need to use wrench to loosen and tighten the bolt to complete the placement and fixation of the micro medical feedthrough.
[0026] 4. The bolt is manufactured by standard mechanical processing technology, and the thread precision is 6h level, which ensures the manufacturing precision of the jig as a whole, and further ensures the reliability of the micro medical feedthrough detection. BRIEF DESCRIPTION OF DRAWINGS
[0027] In the drawings:
[0028] Figure 1 It is a whole structure schematic view of a device for fixing micro medical feedthrough flange;
[0029] Figure 2 It is a whole structure schematic view of a device for fixing micro medical feedthrough flange;
[0030] Figure 3 It is a front view of a cubic module of a device for fixing micro medical feedthrough flange;
[0031] Figure 4 It is a sectional view of a cubic module of a device for fixing micro medical feedthrough flange;
[0032] The components represented by the reference numerals in the drawings are as follows:
[0033] 1, cubic module; 2, through hole; 301, first arc-shaped groove; 302, second arc-shaped groove. DETAILED DESCRIPTION
[0034] Example 1
[0035] The technical scheme of the utility model is as follows:
[0036] Refer to Figure 1 A device for fixing micro medical feedthrough flange, the feedthrough flange includes an annular flange and an insulator installed inside the annular flange, a signal probe group is inserted in the middle of the insulator, and the device includes a plurality of cubic modules 1 which are identical in shape.
[0037] The top end of the cubic module 1 is provided with a first arc-shaped groove 301 and a second arc-shaped groove 302 which are connected in communication along the length direction, the axes of the two arc-shaped grooves coincide, and the radii are different, one of the arc-shaped grooves is matched with the size of the annular flange of the feedthrough flange, and the size of the other arc-shaped groove does not interfere with the signal probe group.
[0038] Through holes 2 are respectively formed below the arc-shaped grooves, the through holes 2 are parallel to the axes of the arc-shaped grooves, each through hole 2 is divided into three hole sections along the axis, and the radii of the two end hole sections are greater than the radius of the middle hole section.
[0039] A plurality of cubic modules 1 are connected by bolts inside the through holes 2, the arc-shaped grooves of the cubic modules 1 are arranged in coincidence, nuts are arranged at the ends of the bolts for cooperation, and the distance between the cubic modules 1 can be adjusted.
[0040] The cubic module 1 is made of white polyformaldehyde material and has good mechanical properties and dimensional stability, so that the structural precision of the device can be maintained for a long time, and the reliability of the detection result is ensured.
[0041] The cubic module 1 adopts an injection molding process, the mold temperature is controlled at 190-210℃, the injection pressure is 90-110MPa, and the cooling time is 40-50 seconds. Strict control of the mold temperature, injection pressure and cooling time and other parameters ensures the dimensional accuracy and surface quality.
[0042] The spacing between the plurality of cubic modules 1 is called a gap, which is used to place a miniature medical feedthrough, and the gap width is 0.2-0.5 cm. This width can be fine-tuned according to different models of miniature medical feedthroughs, and can fully accommodate the main part of the miniature medical feedthrough.
[0043] The surface roughness of the inner wall of the gap is less than 0.2 microns. During detection, it ensures good support and positioning of the miniature medical feedthrough, prevents scratching the feedthrough surface, and can tightly and accurately fix the miniature medical feedthrough, so that the feedthrough will not displace, thereby ensuring the accuracy of the measurement. When measuring parameters such as feedthrough pin length and spacing, measurement errors caused by poor fixation can be avoided, and the measurement accuracy can reach ±0.01 mm.
[0044] The arc-shaped grooves are centrally arranged and machined, and can be projected by an image instrument when observed without blocking the view.
[0045] The first arc-shaped groove 301 and the second arc-shaped groove 302 have the same length, the diameter of the first arc-shaped groove 301 is greater than that of the second arc-shaped groove 302, and the diameter of the first arc-shaped groove 301 is not greater than half the width of the cubic module 1.
[0046] The through hole 2 is in clearance fit with the bolt, and the distance between the two through holes 2 is not less than half the width of the cubic module 1.
[0047] The bolt is made of 316L stainless steel, which has excellent corrosion resistance and can adapt to different detection environments, prolonging the service life of the device. The diameter of the bolt is 0.4-0.6 cm, which ensures that uniform force can be applied during tightening.
[0048] The bolt is manufactured using standard machining processes, and the thread accuracy is 6h grade, which ensures the overall manufacturing accuracy of the device and thus ensures the reliability of the miniature medical feedthrough detection.
[0049] A suitable wrench is used to rotate the bolt counterclockwise, and the operating torque is less than 0.3 N·m. During loosening, the torque can be accurately controlled by a torque wrench to prevent the fixture structure from loosening due to excessive loosening. It is easy for the operator to master, reduces the complexity of operation, and improves work efficiency.
[0050] Through the reasonable design of the device structure for fixing the flange of the miniature medical feedthrough and the accurate control of the bolt torque, a stable environment can be provided for the miniature medical feedthrough during detection.
[0051] Whether under the microscope or the image instrument carries out the detection, can effectively reduce because the clamp shakes or the vibration leads to the image blurred problem, ensures can clearly observe the minimum 0.005 millimeter's defect of the feedthrough surface, and avoids because the excessive tightening leads to the feedthrough pin or the insulating package damage situation to occur, reduces the damage rate of product in the detection process, reduces the production cost.
[0052] The two through holes 2 of the cubic module 1 are symmetric about the axis of the arc-shaped slot, as shown in the figure. Figure 4 Such design can make the cubic module 1 balanced.
[0053] The hole section diameters of the two ends of the through hole 2 are equal, the sum of the lengths of the hole sections of the two ends of the through hole 2 is less than the length of the middle hole section, and the radius of the hole section of the two ends of the through hole 2 is greater than 1.5 times the radius of the middle hole section. Figure 3 Better understanding.
[0054] Further, the middle hole section of the through hole 2 of the cubic module 1 away from the bolt head can also be provided with threads matched with the bolt, saving the nut.
[0055] When multiple cubic modules 1 are connected, each cubic module 1 can be selected to have the first arc-shaped slot 301 close to each other, as shown in the figure. Figure 1 The second arc-shaped slot 302 of each cubic module 1 can also be selected to be close to each other, or the second arc-shaped slot 302 of one cubic module 1 and the first arc-shaped slot 301 of the adjacent cubic module 1 can be selected to be close to each other, as shown in the figure. Figure 2
[0056] The three-section structure of the through hole 2 is designed to adapt to any of the above connection modes of the cubic module 1.
[0057] In use: 1. First, use a wrench to rotate the bolts at both ends of the clamp counterclockwise and loosen them.
[0058] 2. Carefully place the miniature medical feedthrough into the gap, ensuring that the feedthrough fits closely with the inner wall of the gap.
[0059] 3. Use a wrench to rotate the bolts clockwise and tighten them gently.
[0060] 4. Place the device with the fixed feedthrough under a microscope for detection.
[0061] In addition, when placing the miniature medical feedthrough, the operator can use a microscope to assist the operation, ensuring the accuracy of the placement position. This design fully considers the small size of the miniature medical feedthrough, making the operation more precise and convenient. Through microscope observation, the length deviation of the feedthrough pin can be accurately measured, and whether there are small scratches or cracks on the surface of the feedthrough can be clearly observed.
Claims
1. A device for fixing a miniature medical feedthrough flange, the feedthrough flange comprising an annular flange and an insulator installed inside therein, wherein a signal probe assembly is inserted in the middle of the insulator, characterized in that, The application relates to a plurality of cuboid modules (1) of the same shape. The top end of the cuboid module (1) is provided with a first arc-shaped slot (301) and a second arc-shaped slot (302) penetrating along the length direction, the axes of the two arc-shaped slots coincide, the radii are different, the size of one arc-shaped slot matches the size of the annular flange of the feedthrough flange, and the size of the other arc-shaped slot does not interfere with the signal probe group. Two through holes (2) are arranged below the arc-shaped slots, the through holes (2) are parallel to the axes of the arc-shaped slots, each through hole (2) is divided into three hole sections along the axis, and the radii of the two end hole sections are greater than the radius of the middle hole section. A plurality of cuboid modules (1) are arranged in the through holes (2) through bolt connection, the axes of the arc-shaped slots of the cuboid modules (1) coincide, and nuts are arranged at the ends of the bolts for adjusting the spacing of the cuboid modules (1).
2. A device for securing a micro medical feedthrough flange according to claim 1, wherein, The arc-shaped slots are arranged in the middle.
3. A device for securing a micro medical feedthrough flange according to claim 2, wherein, The first arc-shaped slot (301) and the second arc-shaped slot (302) are of the same length.
4. A device for securing a micro medical feedthrough flange according to claim 2, wherein, The diameter of the first arc-shaped slot (301) is greater than that of the second arc-shaped slot (302), and the diameter of the first arc-shaped slot (301) is not greater than half the width of the cuboid module (1).
5. The device for securing a micro medical feedthrough flange of claim 1, wherein, The through holes (2) are matched with the bolts in a clearance fit.
6. A device for securing a micro medical feedthrough flange according to claim 5, wherein, The spacing between the two through holes (2) is not less than half the width of the cuboid module (1).
7. A device for securing a micro medical feedthrough flange according to claim 5, wherein, The axes of the two through holes (2) on the cuboid module (1) are symmetrical about the axis of the arc-shaped slot.
8. A device for securing a micro medical feedthrough flange according to claim 5, wherein, The diameters of the two end hole sections of the through hole (2) are equal.
9. A device for securing a micro medical feedthrough flange according to claim 8, wherein, The sum of the lengths of the two end hole sections of the through hole (2) is less than the length of the middle hole section.
10. The device for securing a micro medical feedthrough flange of claim 8, wherein, The radius of the two end hole sections of the through hole (2) is greater than 1.5 times the radius of the middle hole section.