Repeated positioning device and surgical navigation system

Abstract

The utility model belongs to the technical field of medical navigation, and particularly relates to a repeated positioning device and a surgical navigation system. The repeated positioning device comprises a positioning base and a positioning block, the positioning base comprises a positioning disc, at least three positioning grooves are formed in the upper surface of the positioning disc, the positioning grooves are arranged in a radial shape in the radial direction of the positioning disc, and the two side walls of each positioning groove are inclined planes which incline towards the outside of the groove and are symmetrical; the lower surface of the positioning block is provided with a positioning protrusion corresponding to the positioning groove, the surface of the positioning protrusion is a spherical cambered surface, and the surface of the positioning protrusion abuts against the two side walls of the positioning groove. The positioning block abuts against the positioning disc through the at least three positioning protrusions and the inclined groove walls of the at least three positioning grooves, the positioning protrusions can be automatically centered through the at least three positioning grooves, rapid positioning of the positioning block can be achieved through the positioning protrusions in at least six directions, and the positioning disc is simple in structure and convenient to use. Not only can the mounting efficiency be improved, but also the positioning accuracy can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical navigation technical field, in particular to a kind of repeated positioning device and surgical navigation system. BACKGROUND

[0002] In medical instruments, CT machine is the equipment using X-ray beam, gamma ray, ultrasonic wave etc. to carry out tomography to human body, then obtains the sectional or stereoscopic image of scanning part by computer processing, CT machine can be used for the examination of multiple diseases.

[0003] Since the precision of image obtained by single CT machine is limited, part of examination needs to combine CT technology with other navigation technology to improve the precision of examination. In routine examination, navigation component is removed from CT machine, and human body is scanned using scanning mechanism in CT machine to meet the examination requirement. In accurate examination, navigation component needs to be installed on CT machine to combine CT technology with navigation technology to meet more accurate examination requirement.

[0004] Since CT machine needs to repeatedly disassemble and assemble navigation component, in order to facilitate repeatedly installing navigation component on CT machine and ensure the relative position of repeatedly installed navigation component and CT machine, a repeated positioning device is urgently needed to accurately and quickly install navigation component on CT machine. SUMMARY

[0005] Therefore, the utility model provides a kind of repeated positioning device and surgical navigation system, and the navigation component of navigation system can be installed on CT machine by repeated positioning device, and the repeated positioning device is simple in structure and easy to install, which can ensure the installation efficiency and accuracy of navigation component.

[0006] According to the embodiment of the utility model, a repeated positioning device is provided in the first aspect, comprising:

[0007] Positioning base, comprising disc-shaped positioning disc, the upper surface of the positioning disc is provided with at least three positioning grooves, the positioning grooves are arranged radially along the positioning disc, and the two side walls of the positioning grooves are inclined and symmetrical inclined surfaces outward of the groove;

[0008] Positioning block, arranged above the positioning base, the lower surface of the positioning block is provided with positioning protrusions corresponding to the positioning grooves, the surface of the positioning protrusions is spherical arc surface, and the surface of the positioning protrusions is abutted to the two side walls of the positioning grooves.

[0009] In some embodiments, the positioning disc and the positioning block are connected by a locking bolt, a first threaded hole is formed in the middle of the positioning disc, a first avoiding hole is formed in the middle of the positioning block corresponding to the first threaded hole, and the locking bolt is inserted into the first threaded hole through the first avoiding hole.

[0010] In some embodiments, a guide column is arranged on the lower surface of the positioning block, a guide hole is formed in the positioning disc corresponding to the guide column, and the guide column is arranged in the guide hole to guide the stable movement of the positioning block relative to the positioning disc.

[0011] In some embodiments, the positioning block is detachably connected to the guide column, a second threaded hole is arranged on the lower surface of the positioning block, a screw rod is arranged on the top of the guide column corresponding to the second threaded hole, and the screw rod is arranged in the second threaded hole.

[0012] In some embodiments, the bottom of the guide column is semispherical, and a milled flat surface is arranged on the outer peripheral wall of the guide column.

[0013] In some embodiments, the positioning base further comprises a mounting seat body, the mounting seat body comprises two spaced apart support arms and a connecting arm used to connect the two support arms, the two ends of the connecting arm are connected to the rear end portions of the two support arms, so that the mounting seat body is in a U shape, and the front end portions of the two support arms are mounted with the positioning disc.

[0014] In some embodiments, the front end portions of the two support arms are upwardly curved, the upper surfaces of the two support arms are arranged with ring grooves used to accommodate the positioning disc, positioning through holes are arranged in the ring grooves and penetrate to the lower surfaces of the support arms, and the lower surface of the positioning disc is arranged with a positioning column arranged in the positioning through hole.

[0015] In some embodiments, the positioning disc and the support arm are connected by a tight bolt, the lower surface of the positioning disc is arranged with a third threaded hole, the lower surface of the support arm is arranged with a second avoiding hole, and the tight bolt is inserted into the third threaded hole from below the support arm through the second avoiding hole.

[0016] According to the embodiments of the utility model, the second aspect provides a surgical navigation system, the surgical navigation system includes CT machine and navigation component, the CT machine includes examination bed and the scanning device that sets up the examination bed outside,

[0017] The navigation component is installed on the examination bed through the foregoing repeated positioning device, the positioning block of the repeated positioning device is connected with the navigation component, and the positioning base of the repeated positioning device is connected with the examination bed.

[0018] In some embodiments, the navigation component comprises a light-emitting plate, and a limb limiting seat is arranged on the examination bed; the positioning base comprises a mounting seat body, the mounting seat body comprises two spaced-apart support arms and a connecting arm used to connect the two support arms;

[0019] The connecting arm is connected to the rear end portions of the two support arms at both ends, the limb limiting seat is accommodated between the two support arms, and the front end portions of the two support arms are connected to the positioning disc; the light-emitting plate is connected to the positioning block and located outside the two support arms.

[0020] In the repeated positioning device, the positioning block and the positioning disc are in abutment through at least three positioning protrusions and inclined groove walls of at least three positioning grooves. The at least three positioning grooves not only enable the positioning protrusions to be automatically centered, but also enable the positioning block to be limited in at least six directions through the positioning protrusions, so as to ensure the accuracy of the relative position of the positioning block and the positioning disc. The repeated positioning device realizes rapid positioning only through the positioning grooves and the positioning protrusions, has a simple structure, and can not only improve the installation efficiency but also ensure the accuracy of positioning. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure diagram of the repeated positioning device for installing the navigation component on the examination bed;

[0022] Figure 2 A structure diagram of the repeated positioning device;

[0023] Figure 3 A structure diagram of a cross section of the positioning block and the positioning base;

[0024] Figure 4 A structure diagram of the positioning disc;

[0025] Figure 5 A structure diagram of the positioning block;

[0026] Figure 6 A structure diagram of the front end of the support arm;

[0027] Figure 7 A structure diagram of the guide column.

[0028] In the drawings: examination bed 10; limb limiting seat 11; positioning disc 20; positioning column 21; positioning groove 22; first threaded hole 23; guide hole 24; positioning block 30; positioning protrusion 31; first avoiding hole 32; second threaded hole 33; mounting seat body 40; support arm 41; connecting arm 42; ring groove 43; positioning through hole 44; second avoiding hole 45; third avoiding hole 46; guide column 50; milled flat surface 51; locking bolt 60; washer 61; set screw 62; angle bracket 63; light-emitting plate 70. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0030] The structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions of the utility model that can be implemented. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.

[0031] The orientation or positional relationship referred to in the specification such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, and is not indicative or suggestive of the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicative or suggestive of relative importance.

[0032] As shown in Figure 1 The present embodiment provides a surgical navigation system, which comprises a CT machine and a navigation component, wherein the CT machine comprises an examination bed 10 for a person to lie down and a scanning device (not shown in the present embodiment) arranged outside the examination bed 10, the scanning device is generally in the shape of a door or a ring, and the examination bed 10 can drive the person lying down to enter the inside of the scanning device, so that the scanning device can scan the human body in multiple directions. The navigation component is detachably mounted on the examination bed 10 through a repeated positioning mechanism.

[0033] Specifically referring to Figures 2-5 The repeated positioning device of the present embodiment comprises a positioning base and a positioning block 30, the positioning base comprises a disc-shaped positioning disc 20, and at least three positioning grooves 22 are arranged on the upper surface of the positioning disc 20 and radially arranged along the positioning disc 20. It should be noted that the radial arrangement of the positioning grooves 22 of the present embodiment specifically means that the positioning grooves 22 are arranged on the upper end face of the positioning disc 20 with the center of the positioning disc 20 as the origin, and the longitudinal direction of the positioning grooves 22 is arranged along the radial direction of the positioning disc 20. The two side walls of the positioning grooves 22 of the present embodiment are inclined and symmetrical inclined surfaces towards the outside of the groove, so that the cross section of the positioning groove 22 is in the shape of an inverted isosceles trapezoid or an inverted isosceles triangle with the top larger and the bottom smaller.

[0034] The positioning block 30 of the embodiment is arranged above the positioning disc 20, and the lower surface of the positioning block 30 is provided with at least three positioning protrusions 31 corresponding to the positioning grooves 22. The surface of each positioning protrusion 31 is a spherical arc surface, and specifically, a semispherical surface. The positioning protrusions 31 correspond to the positioning grooves 22 one by one and extend into the positioning grooves 22, and the surface of the positioning protrusion 31 can abut against the two side walls of the positioning groove 22.

[0035] When the positioning block 30 is placed on the positioning disc 20, the positioning protrusions 31 on the positioning block 30 extend into the positioning grooves 22, and the spherical arc surface of the positioning protrusions 31 abuts against the two inclined side walls of the positioning grooves 22. Each side wall limits the positioning protrusion 31 along the normal direction of the contact position, that is, each positioning groove 22 can limit the positioning protrusion 31 from two directions.

[0036] Since the number of the positioning grooves 22 of the embodiment is at least three, and the longitudinal directions of the at least three positioning grooves 22 are different, the at least three positioning grooves 22 can limit the positioning block 30 from at least six directions through the positioning protrusions 31, thereby ensuring the accuracy of the relative position of the positioning block 30 and the positioning disc 20. The number of the positioning grooves 22 of the embodiment is preferably three, which can meet the positioning requirements in a simple structure.

[0037] The two inclined side walls of the positioning groove 22 of the embodiment make the opening of the positioning groove 22 in a flared shape, which not only facilitates the extension of the positioning protrusions 31 into the positioning grooves 22, but also facilitates the automatic centering of the positioning protrusions 31, so that the positioning block 30 moves to the target position. The present scheme realizes rapid positioning only through the structure of the positioning groove 22 and the positioning protrusion 31, which is simple in structure and can not only improve the installation efficiency but also ensure the accuracy of positioning.

[0038] The positioning disc 20 and the positioning block 30 of the embodiment are preferably connected through a locking bolt 60. The middle part of the positioning disc 20 is provided with a first threaded hole 23, the middle part of the positioning block 30 is provided with a first avoiding hole 32, and the locking bolt 60 extends through the first avoiding hole 32 into the first threaded hole 23 to lock the positioning disc 20 and the positioning block 30. A washer 61 can be arranged between the locking bolt 60 and the positioning block 30 to prevent loosening. It should be noted that the positioning disc 20 and the positioning block 30 can be connected by a conventional way such as a buckle or a locking pin according to actual needs, which is not described herein.

[0039] The lower surface of the positioning block 30 of the embodiment is provided with a guide column 50, and the positioning disc 20 is correspondingly provided with a guide hole 24. The guide column 50 is arranged in the guide hole 24 to guide the stable movement of the positioning block 30 relative to the positioning disc 20. The guide column 50 is preferably detachably connected to the positioning block 30 to facilitate the separate machining of the positioning block 30 and the guide column 50.

[0040] With reference to the drawings Figure 7 The guide column 50 of the embodiment is preferably positioned by screwing the positioning block 30, wherein the lower surface of the positioning block 30 is provided with a second threaded hole 33, and the top of the guide column 50 is provided with a screw rod matched with the second threaded hole 33, the screw rod is arranged in the second threaded hole 33, so that the guide column 50 is detachable from the positioning block 30. The bottom of the guide column 50 of the embodiment is a smooth semispherical ball, so as to facilitate the guide column 50 to be arranged in the guide hole 24. A milled flat surface 51 is arranged on the outer peripheral wall of the guide column 50, which facilitates clamping the guide column 50 for assembly. It should be noted that the guide column 50 of the embodiment can be detachable by selecting conventional connection modes such as buckles and pins, and the number of guide columns 50 and guide holes 24 can be set according to actual needs, which will not be described in detail in the embodiment.

[0041] With reference to the drawings Figures 1-3 The positioning base of the embodiment further comprises a mounting seat body 40 connected to the examination bed 10, the mounting seat body 40 comprises two spaced apart support arms 41 and a connecting arm 42 connected to the two support arms 41, wherein the connecting arm 42 is attached to the examination bed 10, and the examination bed 10 is provided with a limb limiting seat 11 for guiding a human body to lie on the examination bed 10.

[0042] The connecting arm 42 of the embodiment is detachably connected to the examination bed 10, and the connecting arm 42 can be selected to be bolted to the examination bed 10. The rear ends of the two support arms 41 are connected to the two ends of the connecting arm 42, so that the mounting seat body 40 is in the shape of U, and a space is left between the two support arms 41 for avoiding the limb limiting seat 11, and the front ends of the two support arms 41 are used to mount the positioning disc 20. The front ends of the two support arms 41 of the embodiment are preferably upwardly curved, so that the front ends of the two support arms 41 are at a distance from the table top of the examination bed 10, facilitating the positioning disc 20 to be mounted to the front ends of the two support arms 41.

[0043] With reference to the drawings Figure 3 and Figure 6The upper surface of the two support arms 41 of the embodiment is provided with a ring groove 43 for accommodating the positioning disc 20, and the positioning disc 20 is provided with a positioning hole 44 penetrating through the lower surface of the support arm 41. The lower surface of the positioning disc 20 is provided with a positioning column 21, which is arranged in the positioning hole 44 to ensure the relative position of the positioning disc 20 and the support arm 41. The lower surface of the positioning disc 20 of the embodiment is preferably provided with a third threaded hole, and the lower surface of the support arm 41 is provided with a second avoiding hole 45. The set screw 62 is arranged to extend into the third threaded hole from below the support arm 41 through the second avoiding hole 45 to fix the positioning disc 20 in the ring groove 43. Since the front end of the two support arms 41 is preferably upwardly curved, the set screw 62 can be conveniently connected to the positioning disc 20 from below the support arm 41, and the arrangement of the set screw 62 can effectively avoid the interference of the set screw 62 with the connection of the positioning block 30 and the positioning disc 20.

[0044] The support arm 41 of the embodiment is provided with a third avoiding hole 46 corresponding to the guide hole 24, which can accommodate the guide column 50 to prevent the interference of the support arm 41 with the guide column 50 from affecting the relative movement of the positioning block 30 and the positioning disc 20. The number of the guide column 50 and the set screw 62 of the embodiment is preferably three, and some embodiments can be arranged according to actual needs.

[0045] Specifically referring to Figure 1 The positioning block 30 of the embodiment is provided with a navigation component, which is preferably a light-emitting plate 70. The light-emitting plate 70 is installed on the examination bed 10 through a repeated positioning device, so that the light-emitting plate 70 always maintains a distance from the scanning mechanism during the movement of the examination bed 10, which can avoid the interference of the light-emitting plate 70 with the scanning mechanism and cause damage. The light-emitting plate 70 is preferably fixed on the outward side of the two support arms 41, so that the light-emitting plate 70 has a certain distance from the limb limiting seat 11 to prevent the interference of the light-emitting plate 70 with the person lying flat.

[0046] The positioning block 30 of the embodiment is preferably provided with an angle bracket 63 for connecting the light-emitting plate 70. The angle bracket 63 includes a first branch arm arranged horizontally and a second branch arm arranged vertically, and the first branch arm and the second branch arm are provided with bolts for connecting the light-emitting plate 70, so that the light-emitting plate 70 is stably and firmly installed. The angle bracket 63 of the embodiment can be integrally formed with the positioning block 30 to reduce the assembly steps.

[0047] It should be noted that the navigation component of some embodiments can also select other existing optical navigation components and / or electromagnetic navigation components according to needs. Since the CT machine combined with the optical navigation component and / or the electromagnetic navigation component for precise examination is a prior art, the embodiment will not be described here.

[0048] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0049] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the application patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the application patent should be subject to the appended claims.

Claims

1. A repeat positioning device, characterized by, The application relates to a positioning base, which comprises a positioning disc (20) in a disc shape, the upper surface of the positioning disc (20) is provided with at least three positioning grooves (22), the positioning grooves (22) are arranged radially along the positioning disc (20), the two side walls of the positioning grooves (22) are inclined towards the outside of the grooves and are symmetrical inclined surfaces. A positioning block (30) is arranged above the positioning base, the lower surface of the positioning block (30) is provided with positioning protrusions (31) corresponding to the positioning grooves (22), the surface of the positioning protrusions (31) is a spherical arc surface, and the surface of the positioning protrusions (31) abuts against the two side walls of the positioning grooves (22). The positioning disc (20) and the positioning block (30) are connected through a locking bolt (60), the middle part of the positioning disc (20) is provided with a first threaded hole (23), the middle part of the positioning block (30) is provided with a first avoiding hole (32) corresponding to the first threaded hole, the locking bolt (60) penetrates through the first avoiding hole (32) and extends into the first threaded hole (23) so as to lock the positioning disc (20) and the positioning block (30).

2. The repeat positioning device of claim 1, wherein: The lower surface of the positioning block (30) is provided with a guide column (50), the positioning disc (20) is provided with a guide hole (24) corresponding to the guide column (50), and the guide column (50) is arranged in the guide hole (24) so as to guide the stable movement of the positioning block (30) relative to the positioning disc (20).

3. The repeat positioning device of claim 2, wherein: The positioning block (30) is detachably connected to the guide column (50), the lower surface of the positioning block (30) is provided with a second threaded hole (33), the top of the guide column (50) is provided with a screw rod matched with the second threaded hole (33), and the screw rod is arranged in the second threaded hole (33).

4. The repeat positioning device of claim 3, wherein: The bottom of the guide column (50) is in a semispherical shape, and a milled flat surface (51) is arranged on the outer peripheral wall of the guide column (50).

5. The repeat positioning device of claim 4, wherein: The positioning base further comprises a mounting seat body (40), the mounting seat body (40) comprises two support arms (41) arranged at intervals and a connecting arm (42) used for connecting the two support arms (41), the two ends of the connecting arm (42) are connected to the rear end parts of the two support arms (41), so that the mounting seat body (40) is in a U shape, and the front end parts of the two support arms (41) are provided with ring grooves (43) used for accommodating the positioning disc (20), positioning through holes (44) penetrating through the lower surfaces of the support arms (41) are arranged in the ring grooves (43), and the lower surface of the positioning disc (20) is provided with a positioning column (21) arranged in the positioning through hole (44).

6. Repetitive positioning device according to any of the claims 1-5, characterized in that: ​ 7. The repeat positioning device of claim 6, wherein: ​ 8. The repeat positioning device of claim 7, wherein: The positioning disc (20) is connected with the support arm (41) through a set screw (62), a third threaded hole is arranged on the lower surface of the positioning disc (20), a second avoiding hole (45) is arranged on the lower surface of the support arm (41), and the set screw (62) passes through the second avoiding hole (45) below the support arm (41) and extends into the third threaded hole.

9. A surgical navigation system comprising a CT machine and a navigation component, the CT machine comprising an examination bed (10) and a scanning device arranged outside the examination bed (10), characterized in that: The navigation component is installed on the examination bed (10) through the repeated positioning device according to any one of claims 1-8, the positioning block (30) of the repeated positioning device is connected with the navigation component, and the positioning base of the repeated positioning device is connected with the examination bed (10).

10. The surgical navigation system of claim 9, wherein: The navigation component comprises a light-emitting plate (70), and the examination bed (10) is provided with a limb limiting seat (11); the positioning base further comprises a mounting seat body (40), the mounting seat body (40) comprises two support arms (41) arranged at intervals and a connecting arm (42) used for connecting the two support arms (41); The connecting arm (42) is connected with the rear end portions of the two support arms (41), the two support arms (41) are used for accommodating the limb limiting seat (11) between them, and the front end portions of the two support arms (41) are connected with the positioning disc (20); the light-emitting plate (70) is connected with the positioning block (30) and located outside the two support arms (41). The connecting arm (42) is connected with the rear end portions of the two support arms (41), the two support arms (41) are used for accommodating the limb limiting seat (11) between them, and the front end portions of the two support arms (41) are connected with the positioning disc (20); the light-emitting plate (70) is connected with the positioning block (30) and located outside the two support arms (41).

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