Medical guider positioning tool

Abstract

The invention relates to the field of medical jigs, in particular to a medical guider positioning tool. The medical guider positioning tool comprises a bottom plate; the base fixing plate is fixed on the bottom plate, and a base of the medical guider is detachably and laterally fixed on the base fixing plate through a locking piece; the support assembly comprises at least two supports which are arranged on the bottom plate along the bending path of the connecting rod of the medical guider, and clamping grooves used for clamping the connecting rod are formed in the supports; the sleeve mounting seat is fixed on the bottom plate and is arranged at the other end of the bracket assembly relative to the bottom plate fixing plate, a containing groove for containing a sleeve of the medical guider is formed in the sleeve mounting seat, and the sleeve is transversely locked in the containing groove by a locking piece; the supporting column assembly is fixed to the bottom plate and comprises a plurality of supporting columns arranged on the periphery of the sleeve installation base, and the supporting columns are used for fixing a tracking plate of the medical guider to the position above the containing groove and keeping the bottom end of a thin connecting rod of the medical guider to be connected to the side wall of the sleeve in a matched mode.

Description

Technical Field

[0001] This application relates to the field of medical fixtures, specifically to a medical guide positioning fixture. Background Technology

[0002] In orthopedic surgical navigation systems, medical guides are used to assist surgeons in precisely positioning surgical instruments or implants. A medical guide typically includes a base, a sleeve, a tracking plate, a connecting rod linking the base and sleeve, and a thin connecting rod linking the tracking plate and sleeve. During the manufacturing process of this medical guide, these components need to be welded together to form a single unit.

[0003] Current welding methods mostly rely on manual alignment. However, due to the bent structure of the connecting rod, a strict spatial coordinate relationship must be maintained between the sleeve and the base. Furthermore, the thin connecting rod is short, in a special position, and lacks effective support, making it prone to displacement during welding. Manual alignment makes it difficult to guarantee the consistency of the spatial position of each component after welding, easily leading to sleeve axis misalignment or connecting rod twisting, thus affecting the guiding accuracy during surgery. Secondly, existing welding methods require repeated adjustments and measurements of the centering and position of each component, resulting in long welding times for single pieces, making them unsuitable for mass production. In addition, inconsistent operating standards among different operators or between different batches by the same operator lead to poor product consistency and unstable quality. Summary of the Invention

[0004] The purpose of this invention is to provide a medical guide positioning fixture that can eliminate human error and improve welding quality and welding efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a medical guide positioning fixture, comprising: Base plate; A base fixing plate is fixed to the base plate, and the base of the medical guide is detachably and laterally fixed to the base fixing plate by a locking device; A support assembly includes at least two supports arranged on the base plate along the bending path of the link of the medical guide, the supports having slots formed for holding the link; A sleeve mounting base is fixed to the base plate, and the other end of the bracket assembly is disposed opposite the base plate fixing plate. The sleeve mounting base has a receiving groove for accommodating a sleeve of the medical guide, and the sleeve is laterally locked within the receiving groove by a locking member. A support column assembly is fixed on the base plate. The support column assembly includes a plurality of support columns arranged around the sleeve mounting base. The support columns are used to fix the tracking plate of the medical guide above the receiving groove and to keep the bottom end of the thin connecting rod of the medical guide mated to the side wall of the sleeve.

[0006] Furthermore, the medical guide positioning fixture also includes a connector that is perpendicular to the base fixing plate, and the connecting rod is inserted into the connector to abut against the base.

[0007] Furthermore, the medical guiding and positioning fixture also includes a limiting rod vertically disposed on the base fixing plate to be adapted to be inserted into the base.

[0008] Furthermore, a side plate is installed on the base fixing plate, and the side plate and the base positioning plate surround to form a receiving cavity for accommodating the base.

[0009] Furthermore, the bracket assembly also includes a pressure plate that is locked onto the bracket by fasteners.

[0010] Furthermore, a clamping member is threadedly connected to the sleeve mounting base, and the clamping member abuts against the sleeve on one side of the sleeve so that the sleeve abuts against the end of the connecting rod.

[0011] Furthermore, the clamping member includes a locking section forming a screw, a guide section extending from one end of the locking section, and a gripping section extending from the other end of the locking section, wherein the diameter of the guide section is smaller than the diameter of the locking section.

[0012] Furthermore, the support column is provided with a locking element for locking the tracking plate onto the support column.

[0013] Furthermore, the locking member includes a smooth rod section, a screwing section extending from one end of the smooth rod section, and a threaded section extending from the other end of the smooth rod section, wherein the diameter of the threaded section is smaller than the diameter of the smooth rod section.

[0014] Furthermore, the bracket assembly has a plurality of brackets that can be selectively mounted onto the base plate, wherein at least a portion of the brackets have slots of different depths and / or different widths.

[0015] The beneficial effects of this invention are as follows: The medical guide positioning fixture of this application realizes the unified benchmark positioning of each component of the medical guide to be welded on the same base plate through the base fixing plate, bracket assembly, sleeve mounting seat and support column assembly, which ensures that the relative positions between each component are accurate and consistent before welding, eliminating the need for repeated measurement and adjustment, reducing manual alignment time, improving welding efficiency, and eliminating human error, so that each welded guide has the same spatial geometric accuracy, thereby improving welding quality.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a medical guide positioning fixture according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the medical guide positioning fixture from another perspective; Figure 3 for Figure 1 A schematic diagram of the clamping component in the middle; Figure 4 for Figure 1 A schematic diagram of the locking mechanism.

[0018] Marked in the diagram: 10. Base plate; 20. Base fixing plate; 21. Locking component; 22. Connector; 23. Limiting rod; 30. Bracket assembly; 31. Bracket; 32. Slot; 33. Pressure plate; 34. Locking bolt; 40. Sleeve mounting base; 41. Receiving groove; 42. Sleeve fixing rod; 43. Pressing component; 431. Locking section; 432. Guide section; 433. Grip section; 434. Chamfered part; 50. Support column assembly; 51. Support column; 52. Locking component; 521. Smooth rod section; 522. Tightening section; 523. Threaded section; 60. Side plate. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] 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.

[0021] In the description of this invention, it should be noted that, 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 this invention based on the specific circumstances.

[0022] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Please see Figures 1-4 The medical guide positioning fixture shown in one embodiment of this application includes a base plate 10, a base fixing plate 20, a bracket assembly 30, a sleeve mounting seat 40, and a support column 51 assembly 50. The base fixing plate 20 is fixed to the base plate 10. The base of the medical guide (not shown) is detachably and laterally fixed to the base fixing plate 20 by a locking member 21. The bracket assembly 30 includes at least two brackets 31 arranged on the base plate 10 along the bending path of the connecting rod of the medical guide, and the brackets 31 have slots 32 formed on them for holding the connecting rod. In this embodiment, the number of brackets 31 is set to 3. The sleeve mounting seat 40 is fixed to the base plate 10, and the other end of the bracket assembly 30 is set opposite to the base plate 10 fixing plate. The sleeve mounting seat 40 has a receiving groove 41 for accommodating the sleeve of the medical guide. The sleeve is laterally locked in the receiving groove 41 by the locking member 21. The support column 51 assembly 50 is fixed to the base plate 10. The support column 51 assembly 50 includes a plurality of support columns 51 arranged around the sleeve mounting base 40. The support columns 51 are used to fix the tracking plate of the medical guide above the receiving groove 41 and to keep the bottom end of the thin connecting rod of the medical guide mated to the side wall of the sleeve.

[0024] The medical guide positioning fixture uses a base fixing plate 20, a bracket assembly 30, a sleeve mounting base 40, and a support column 51 assembly 50 to uniformly position the various components of the medical guide to be welded on the same base plate 10 for reference positioning. This ensures that the relative positions of the components are accurate and consistent before welding, eliminating the need for repeated measurement and adjustment, reducing manual alignment time, improving welding efficiency, and eliminating human error. It also ensures that each welded guide has the same spatial geometric accuracy, thereby improving welding quality.

[0025] It should be noted that before the aforementioned medical guide is installed onto the medical guide positioning fixture, the thin connecting rod can be pre-fixed below the tracking plate. Specifically, the tracking plate has an insertion hole for inserting the thin connecting rod, and one end of the thin connecting rod is inserted into the insertion hole. During assembly, the base is first laterally fixed to the base fixing plate 20. Then, the connecting rod is placed in the slot 32 of the bracket 31, at which point one end of the connecting rod abuts against the base. Next, the sleeve is placed in the receiving groove 41, and the other end of the connecting rod abuts against the side wall of the sleeve. Finally, the tracking plate with the thin connecting rod installed is placed on the support column 51 assembly 50, so that the support column 51 assembly 50 fixes the tracking plate above the sleeve, while the bottom end of the thin connecting rod abuts against the side wall of the sleeve. After the above placement is completed, only the parts that need to be welded need to be welded. During the welding process, there is no need to adjust the relative positions of the various components of the medical guide.

[0026] In one embodiment, the medical guide positioning fixture further includes a connector 22 disposed vertically on the base fixing plate 20, into which a connecting rod is inserted to abut against the base. The central axis of the connector 22 overlaps with the central axis of the base. The connector 22, acting as a guide and limiting structure, ensures that the end of the connecting rod accurately abuts against the designated position on the base (the center position of the base), preventing the connecting rod from shifting during welding, thereby improving the alignment accuracy at the connection between the base and the connecting rod. To add anti-rotation limiting on top of lateral locking, ensuring that the base does not rotate slightly during welding, the medical guide positioning fixture also includes a limiting rod 23 vertically disposed on the base fixing plate 20 to accommodate insertion into the base. To further achieve positioning and protect the base, in this embodiment, a side plate 60 is installed on the base fixing plate 20, and the side plate 60 and the base positioning plate form a receiving cavity (not labeled) for accommodating the base. Specifically, the side plate 60 has a U-shaped structure and is mounted on the base plate 10, with the base fixing plate 20 mounted on the side plate 60.

[0027] In one embodiment, the support assembly 30 further includes a pressure plate 33 locked to the support 31 by fasteners, the pressure plate 33 being fixed to the support 31 by locking bolts 34. During welding, the pressure plate 33 presses down on the side of the connecting rod, preventing the connecting rod from disengaging from the slot 32 even under welding heat stress or operational contact, thus ensuring the stability of the connecting rod's posture and preventing displacement. In practical applications, the support assembly 30 has several supports 31 that can be selectively mounted onto the base plate 10, and at least some of the slots 32 in the several supports 31 have different depths and / or different widths. When assembling the medical guide, different depths / widths of the slots 32 can be selected according to the size requirements of different connecting rods, thereby adapting to the needs of different models of medical guides, improving positioning reliability, and making the same tooling compatible with multiple product models, reducing tooling manufacturing costs.

[0028] In one embodiment, to accommodate sleeves of different diameters, the depth of the receiving cavity is greater than the radial dimension of the sleeve. To facilitate sleeve installation, a sleeve fixing rod 42 is provided within the receiving cavity. In practical applications, the sleeve 41 is fitted onto the sleeve fixing rod 42 and fixed within the receiving cavity. The sleeve fixing rod 42 is a bolt assembly. Through holes are formed on opposite side walls of the sleeve mounting base 40, and the bolt of the bolt assembly passes through these through holes to fix the sleeve within the receiving cavity.

[0029] In one embodiment, a clamping member 43 is threadedly connected to the sleeve mounting base 40. The clamping member 43 abuts against the sleeve on one side to bring the sleeve into contact with the end of the connecting rod. By pushing the sleeve with the clamping member 43, the side of the sleeve is tightly fitted to the end of the connecting rod, ensuring that the connection length between the sleeve and the connecting rod is consistent and seamless after welding, thus improving the overall rigidity and length accuracy of the guide. In practical applications, the welding point between the sleeve and the connecting rod is located on the virtual extension line of the central axis of the clamping member. The clamping member 43 includes a locking section 431 forming the screw, a guide section 432 extending from one end of the locking section 431, and a gripping section 433 extending from the other end of the locking section 431. The diameter of the guide section 432 is smaller than the diameter of the locking section 431. The guide section 432 first enters the threaded hole (unlabeled) of the sleeve mounting base, serving as a guide to prevent thread misalignment and damage to the workpiece or tooling. When the locking section 431 mates with the threaded hole, the guide section 432 does not participate in locking, thus controlling the clamping depth and preventing the sleeve from being excessively squeezed and deformed. In this embodiment, the front end of the guide section 432 has a chamfered portion 434, which can be inserted into the opening groove of the sleeve, thereby positioning the sleeve and preventing axial rolling. In other embodiments, the clamping member 43 can also be other structures, such as a spring or other pressure member provided on the sleeve mounting base 40.

[0030] In one embodiment, a locking member 52 is provided on the support column 51 to lock the tracking plate onto the support column 51. Thus, without the need for an additional pressure plate 33 or clamps, the tracking plate can be pressed firmly against the end face of the support column 51 with a single tightening, ensuring that the tracking plate does not wobble during welding and that its position and height can be repeated. Specifically, the locking member 52 includes a smooth rod section 521, a tightening section 522 extending from one end of the smooth rod section 521, and a threaded section 523 extending from the other end of the smooth rod section 521. The diameter of the threaded section 523 is smaller than the diameter of the smooth rod section 521, and the diameter of the tightening section 522 is larger than the diameter of the smooth rod section 521. The threaded section 523 passes through the hole in the tracking plate and connects to the internal thread of the support column 51. The smooth rod section 521 and the hole in the tracking plate achieve a clearance fit. When tightened, the stepped surface between the smooth rod section 521 and the tightening section 522 presses the tracking plate firmly, while the thread directly locks onto the tracking plate, effectively preventing deformation of the tracking plate. In other embodiments, a threaded rod can be provided on the support column 51. After the holes on the four ends of the tracking plate are inserted into the threaded rod, bolts are then tightened to achieve fixation.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A medical guide positioning fixture, characterized in that, include: Base plate; A base fixing plate is fixed to the base plate, and the base of the medical guide is detachably and laterally fixed to the base fixing plate by a locking device; A support assembly includes at least two supports arranged on the base plate along the bending path of the link of the medical guide, the supports having slots formed for holding the link; A sleeve mounting base is fixed on the base plate, and the other end of the bracket assembly is disposed opposite to the base plate fixing plate. The sleeve mounting base is provided with a receiving groove for accommodating the sleeve of the medical guide, and the sleeve is laterally locked in the receiving groove by a locking member. and A support column assembly is fixed on the base plate. The support column assembly includes a plurality of support columns arranged around the sleeve mounting base. The support columns are used to fix the tracking plate of the medical guide above the receiving groove and to keep the bottom end of the thin connecting rod of the medical guide mated to the side wall of the sleeve.

2. The medical guide positioning fixture as described in claim 1, characterized in that, The medical guide positioning fixture also includes a connector that is perpendicular to the base fixing plate, and the connecting rod is inserted into the connector to abut against the base.

3. The medical guide positioning fixture as described in claim 2, characterized in that, The medical guiding and positioning fixture also includes a limiting rod that is vertically mounted on the base fixing plate to be adapted to be inserted into the base.

4. The medical guide positioning fixture as described in claim 1 or 3, characterized in that, A side plate is installed on the base fixing plate, and the side plate and the base positioning plate surround to form a receiving cavity for accommodating the base.

5. The medical guide positioning fixture as described in claim 1, characterized in that, The bracket assembly also includes a pressure plate that is locked onto the bracket by fasteners.

6. The medical guide positioning fixture as described in claim 1, characterized in that, A clamping member is threadedly connected to the sleeve mounting base. The clamping member abuts against the sleeve on one side so that the sleeve abuts against the end of the connecting rod.

7. The medical guide positioning fixture as described in claim 6, characterized in that, The clamping member includes a locking section forming a screw, a guide section extending from one end of the locking section, and a gripping section extending from the other end of the locking section, wherein the diameter of the guide section is smaller than the diameter of the locking section.

8. The medical guide positioning fixture as described in claim 1, characterized in that, The support column is provided with a locking element for locking the tracking plate onto the support column.

9. The medical guide positioning fixture as described in claim 8, characterized in that, The locking member includes a smooth rod section, a screwing section extending from one end of the smooth rod section, and a threaded section extending from the other end of the smooth rod section, wherein the diameter of the threaded section is smaller than the diameter of the smooth rod section.

10. The medical guide positioning fixture as described in claim 1, characterized in that, The bracket assembly has a plurality of brackets that can be selectively mounted onto the base plate, wherein at least some of the brackets have slots of different depths and / or different widths.

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