Auxiliary positioning device and positioning system

Abstract

The utility model discloses an auxiliary positioning device and a positioning system, the auxiliary positioning device comprises a mounting part, the two ends of the mounting part are respectively connected with a positioning assembly, and the mounting part is clamped on a treatment platform through the positioning assemblies; a sunken groove and a connecting piece are arranged on the mounting piece, the outer contour of the connecting piece is matched with the outer contour of the sunken groove, and the connecting piece is partially embedded into the sunken groove so as to position the position of the connecting piece on the mounting piece; the connecting piece is used for being connected with the positioning tool so that the positioning tool can be installed on the treatment platform. The auxiliary positioning device and the positioning system are used for ensuring the stability of the positioning tool installed on the auxiliary positioning device, and the auxiliary positioning device is convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, and in particular to an auxiliary positioning device and positioning system. Background Technology

[0002] When performing treatments such as boron neutron capture therapy (BNCT) on patients, it is necessary to fix the patient's position so that the treatment can be accurately performed on the lesion. This prevents deviations in position from the treatment site and the lesion site, which could affect the treatment effect.

[0003] Current methods for patient positioning involve installing an auxiliary positioning device on the existing treatment platform, then attaching a positioning fixture to the auxiliary positioning device, which in turn is mounted on the treatment platform. The positioning fixture is used to fix the patient's position. The stability of the positioning fixture mounted on the auxiliary positioning device, as well as the positional stability and accuracy of the auxiliary positioning device on the treatment platform, affect the positioning accuracy and the effectiveness of patient fixation. Existing auxiliary positioning devices are generally fixed to the treatment platform using mechanical clamping structures such as screws or suction cups, which are relatively cumbersome to install. Utility Model Content

[0004] The purpose of this utility model is to provide an auxiliary positioning device and a positioning system to ensure the stability of the positioning fixture installed on the auxiliary positioning device and to make the installation of the auxiliary positioning device more convenient.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An auxiliary positioning device is provided for installation on a treatment platform and to assist in the installation of a positioning fixture. The auxiliary positioning device includes a mounting component, with positioning components connected to both ends of the mounting component, and the mounting component is snapped onto the treatment platform via the positioning components. The mounting component is provided with a recessed groove and a connecting component. The outer contour of the connecting component is adapted to the outer contour of the recessed groove, and the connecting component is partially embedded in the recessed groove to position the connecting component on the mounting component. The connecting component is used to connect with the positioning fixture to install the positioning fixture on the treatment platform.

[0007] Preferably, the mounting member includes a first side facing the treatment platform and a second side away from the treatment platform; the recessed groove is formed on the second side; the mounting member is connected to a locking member, which passes through the mounting member from the first side and is fixedly connected to the connector.

[0008] Preferably, the mounting member is provided with a mounting hole extending from the first surface toward the second surface, the locking member is mounted in the mounting hole, and the end of the locking member away from the connector is flush with or recessed into the first surface.

[0009] Preferably, there are two connectors, and the two connectors are symmetrically arranged with respect to the center of the mounting component;

[0010] The connector is threadedly connected to the locking member.

[0011] Preferably, the end of the mounting member used to connect with the positioning component is provided with a hollow portion to increase the elastic modulus of the end of the mounting member.

[0012] Preferably, the positioning component includes a main body portion for engaging with the treatment platform and a protrusion portion protruding from the main body portion toward the upper end face of the mounting member, the protrusion portion abutting against the mounting member, and the upper end face of the main body portion being spaced apart from the mounting member.

[0013] Preferably, the positioning component further includes an elastic pad, which is disposed between the upper end face of the main body and the mounting member;

[0014] The main body and the protrusion are nylon blocks.

[0015] Preferably, the positioning component is connected to the mounting member by a fixing member, which is provided at least at the connection position between the protrusion and the mounting member and the connection position between the elastic pad and the mounting member.

[0016] Preferably, the main body is provided with a first snap-fit ​​part, and the main body is snap-fitted to the treatment platform through the first snap-fit ​​part;

[0017] The main body is provided with a guide portion located in front of the first snap-fit ​​portion along the snap-fit ​​direction, and the guide portion guides the snap-fit ​​operation between the main body and the treatment platform.

[0018] A positioning system, comprising:

[0019] The auxiliary positioning device of any one of the above includes a positioning component provided with a first engaging portion;

[0020] The treatment platform is provided with multiple second locking parts, which are used to lock with the first locking parts. By locking different second locking parts with the first locking parts, the auxiliary positioning device can be locked at multiple positions on the treatment platform.

[0021] A positioning fixture is installed on the auxiliary positioning device, and the positioning fixture is used to fix the patient on the treatment platform.

[0022] Preferably, the first snap-fit ​​portion and the second snap-fit ​​portion are mutually cooperating arcuate grooves and arcuate protrusions, and the fitting gap formed when the first snap-fit ​​portion and the second snap-fit ​​portion snap-fit ​​together is less than 0.03mm.

[0023] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0024] By using a positioning component to snap-fit ​​the mounting parts to the treatment platform, the auxiliary positioning device only requires a press-fit fixation method, making operation simple and convenient, and enabling quick installation between the auxiliary positioning device and the treatment platform. The recessed groove, in conjunction with the connector, creates a tight abutment between the wall of the recessed groove and the perimeter of the connector, thus limiting relative movement between the connector and the mounting parts, improving their stability, and consequently enhancing the stability of the positioning fixture after installation on the auxiliary positioning device. The recessed groove also serves a positioning function, ensuring that the connector is installed in the corresponding position on the mounting part, thereby ensuring the accurate installation position of the positioning fixture. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the positioning system according to an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of the positioning system according to an embodiment of the present utility model;

[0027] Figure 3 yes Figure 2 Enlarged view of section A;

[0028] Figure 4 yes Figure 2 Enlarged view of section B;

[0029] Figure 5 This is a schematic diagram of the structure of the auxiliary positioning device according to an embodiment of the present utility model;

[0030] Figure 6 This is a partial exploded view of the auxiliary positioning device according to an embodiment of the present invention;

[0031] Figure 7 This is a partial structural schematic diagram of the auxiliary positioning device according to an embodiment of the present utility model.

[0032] In the diagram: 100, auxiliary positioning device; 1, mounting part; 11, recessed groove; 12, first surface; 13, second surface; 14, mounting hole; 15, hollowed-out part; 16, through hole; 2, positioning component; 21, main body; 211, first snap-fit ​​part; 212, guide part; 22, protrusion; 221, mating hole; 23, elastic pad; 3, connector; 31, threaded hole; 4, locking part; 41, head; 42, threaded part; 5, fixing part; 200, treatment platform; 201, second snap-fit ​​part. Detailed Implementation

[0033] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0034] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0035] like Figure 1 As shown, this utility model provides an auxiliary positioning device 100 for installation on a treatment platform 200. The auxiliary positioning device 100 is used to connect to a positioning fixture capable of fixing the patient's position, thereby assisting in the installation of the positioning fixture on the treatment platform 200. The auxiliary positioning device 100 includes a mounting component 1 and a positioning assembly 2.

[0036] Reference Figure 1 and Figure 5 The positioning component 2 can be snapped onto the treatment platform 200. A pair of positioning components 2 can be provided, with each pair installed at opposite ends of the mounting component 1. Therefore, each end of the mounting component 1 can be snapped and fixed to the treatment platform 200 via the corresponding positioning component 2, thus fixing the mounting component 1 to the treatment platform 200. By using the snap-fit ​​method to fix the positioning component 2 to the treatment platform 200, the positions of the positioning component 2 and the treatment platform 200 are kept fixed, and both the positioning component 2 and the mounting component 1 can be stably installed on the treatment platform 200. Furthermore, the installation method of the positioning component 2 and the treatment platform 200 is relatively simple, allowing for quick and easy installation of both components. The installation of the positioning component 2 requires no electric components, avoiding the risk of electromagnetic interference or accidental triggering, and complies with medical device safety standards.

[0037] Reference Figure 5The mounting component 1 can be a strip structure made of aluminum alloy or carbon fiber. Aluminum alloy and carbon fiber have low neutron absorption rates, allowing the mounting component 1 to balance stiffness and neutron beam penetration requirements. The end of the mounting component 1 used to connect with the positioning component 2 has a hollow portion 15. The hollow portion 15 is adjacent to the positioning component 2, and the hollow portion 15 increases the elastic modulus at the corresponding location. When the mounting component 1 is snapped onto the treatment platform 200 by the positioning component 2, the portion of the mounting component 1 adjacent to the positioning component 2 (the area with the hollow portion 15) has a better elastic modulus. This portion of the mounting component 1 adjacent to the positioning component 2 can be slightly elongated to facilitate the snapping of the positioning component 2 with the treatment platform 200. After the positioning component 2 is snapped onto the treatment platform 200, the mounting component 1 returns to its original position, causing the positioning component 2 to adhere tightly to the treatment platform 200, increasing the fixation effect between the positioning component 2 and the treatment platform 200. The length of the mounting component 1 is adapted to the width of the treatment platform 200. When different widths of treatment platforms 200 are used, the mounting component 1 can be set to the corresponding width to ensure that the mounting component 1 can be fixedly connected to the treatment platform 200 along the opposite sides of the width direction of the treatment platform 200 through the positioning component 2.

[0038] Reference Figure 4 and Figure 5 The mounting component 1 includes a first surface 12 and a second surface 13 facing each other. The first surface 12 of the mounting component 1 is oriented towards the treatment platform 200 and can be fitted against the treatment platform 200 to prevent relative movement between the mounting component 1 and the treatment platform 200 due to the presence of gaps. A connector 3 may be provided on the second surface 13 of the mounting component 1. The connector 3 protrudes from the second surface 13 of the mounting component 1 and is used to connect with a positioning fixture, so that the positioning fixture is mounted on the mounting component 1.

[0039] The device may have two connectors 3, each used to connect to a positioning fixture to improve the stability of the connection between the mounting component 1 and the positioning fixture. The two connectors 3 may be symmetrically arranged relative to the center of the mounting component 1. The spacing between the two connectors 3 can be selected according to the needs of different positioning fixtures; for example, the spacing between the two connectors 3 may be 200mm to conform to the ISO standard positioning fixture interface. In other embodiments, more than two connectors 3 may be provided, with multiple connectors 3 used to connect to the positioning fixture.

[0040] Reference Figure 4To ensure stability between the connector 3 and the mounting component 1, a portion of the connector 3 can be embedded in the mounting component 1. Specifically, the mounting component 1 has a recessed groove 11 recessed from its second surface 13. The contour of the recessed groove 11 matches the outer contour of the connector 3; for example, the contour of the recessed groove 11 is the same as or slightly smaller than the outer contour of the connector 3. Therefore, when the connector 3 is embedded in the recessed groove 11, the wall forming the recessed groove 11 will tightly abut against the periphery of the connector 3, thereby limiting the relative movement between the connector 3 and the mounting component 1 and improving the stability between them. When the positioning fixture is installed on the connector 3, it will not or will not wobble due to displacement between the connector 3 and the mounting component 1. The positioning fixture can be stably installed on the mounting component 1 to ensure a stable position between the positioning fixture and the treatment platform 200, thus ensuring the positioning effect of the positioning fixture on the patient. In addition, the recessed groove 11 can also serve a positioning function to ensure that the connector 3 is installed in the corresponding position of the mounting part 1, thereby ensuring the accurate installation position of the positioning fixture. The recessed groove 11 can be formed by countersinking on the first surface 12 of the mounting surface with the diameter of the connector 3 as a reference.

[0041] In some specific embodiments, the mounting member 1 is also connected to a locking member 4. The locking member 4 passes through the mounting member 1 from the first surface 12 and is fixedly connected to the connecting member 3 to lock the connecting member 3. Specifically, the locking member 4 includes a head 41 connected to each other and a threaded portion 42 with external threads. The head 41 is used to abut against the mounting member 1. The connecting member 3 is provided with a threaded hole 31 that is threadedly engaged with the threaded portion 42. The threaded portion 42 of the locking member 4 passes through the mounting member 1 and extends into the threaded hole 31 of the connecting member 3 to be threadedly fixedly connected to the connecting portion.

[0042] By setting a locking member 4 and a recessed groove 11, the wall of the recessed groove 11 is arranged around the connector 3 to restrict the horizontal movement of the connector 3. The locking member 4 is connected to the connector 3 to lock the connector 3 in the vertical direction. The locking member 4 and the recessed groove 11 are used together to fix the connector 3 so that the connector 3 is firmly connected to the mounting part 1, ensuring that the positioning fixture can be firmly connected to the mounting part 1 after it is connected to the connector 3.

[0043] In some specific embodiments, the mounting member 1 is provided with a mounting hole 14 extending from the first surface 12 toward the second surface 13, and the mounting hole 14 communicates with the recessed groove 11. The threaded portion 42 of the locking member 4 extends from the mounting hole 14 into the threaded hole 31 of the connector 3. The head 41 of the locking member 4 is accommodated in the mounting hole 14 and can abut against the wall forming the mounting hole 14. When the head 41 of the locking member 4 abuts against the wall forming the mounting hole 14, the wall forming the mounting hole 14 restricts the further vertical movement of the head 41 of the locking member 4, thereby restricting the position of the locking member 4. The mounting hole 14 can be a conical countersunk hole, preferably a 90° conical countersunk hole, and the head 41 of the locking member 4 is adapted to the shape of the mounting hole 14, that is, the head 41 of the locking member 4 can be a conical structure, preferably a conical structure with a 90° cone angle.

[0044] When the locking member 4 is connected to the connecting member 3, the end of the locking member 4 away from the connecting member 3 is flush with or recessed into the first surface 12. That is, the end face of the head 41 of the locking member 4 is flush with or recessed into the first surface 12, so as to avoid the head 41 of the locking member 4 protruding outward and affecting the fit and fixation of the first surface 12 of the mounting member 1 and the treatment platform 200.

[0045] Reference Figure 3 The positioning component 2 includes a main body 21 for engaging with the treatment platform 200 and a protrusion 22 extending from the main body 21 toward the upper end face of the mounting component 1. The main body 21 and the protrusion 22 can be an integral structure, and both the main body 21 and the protrusion 22 can be nylon blocks made of nylon material. Nylon blocks have a smaller thermal neutron absorption cross section, effectively avoiding interference with the treatment dose distribution, and the replacement cost of nylon blocks after wear is lower, resulting in lower maintenance costs.

[0046] Reference Figure 3 and Figure 7 The main body 21 may be provided with a first engaging portion 211, through which the main body 21 engages with the treatment platform 200. Furthermore, to facilitate the engagement between the main body 21 and the treatment platform 200, the main body 21 may also be provided with a guide portion 212, which is located in front of the first engaging portion 211 along the engagement direction. When the main body 21 engages with the treatment platform 200, the guide portion 212 can first guide the connection direction between the main body 21 and the treatment platform 200, after which the main body 21 engages with the treatment platform 200 through the first engaging portion 211, facilitating the engagement operation and achieving a rapid connection between the positioning component 2 and the treatment platform 200.

[0047] The protrusion 22 is used to abut against the mounting member 1, and the upper end face of the main body 21 can be spaced apart from the mounting member 1. The gap between the main body 21 and the mounting member 1 can serve as an elastic deformation space for the main body 21, so that the main body 21 has a certain amount of elastic deformation, thereby facilitating the snap-fit ​​operation between the main body 21 and the treatment platform 200. Furthermore, referring to… Figure 4 and Figure 6 The positioning component 2 may also include an elastic pad 23 located between the upper surface of the main body 21 and the mounting component 1. The elastic pad 23 can abut against both the main body 21 and the mounting component 1. When the main body 21 undergoes elastic deformation, it can compress the elastic pad 23. After the main body 21 engages with the treatment platform 200, the elastic pad 23 and the main body 21 return to their original positions, ensuring a tight fit between the main body 21 and the treatment platform 200. By providing the elastic pad 23, the main body 21 can have a certain amount of elastic deformation while ensuring it can return to its original position after engagement. This also increases the holding force between the main body 21 and the treatment platform 200, enhancing the fixation effect between the positioning component 2 and the treatment platform 200. Specifically, the elastic pad 23 can be a rubber elastic O-ring.

[0048] The positioning component 2 and the mounting component 1 can be connected by a fastener 5. The fastener 5 is provided at least at the connection position between the protrusion 22 and the mounting component 1, and at the connection position between the elastic pad 23 and the mounting component 1. Specifically, the mounting component 1 is provided with a through hole 16, and the positioning component 2 is provided with a mating hole 221 communicating with the through hole 16. The fastener 5 is provided to pass through the through hole 16 and extend into the mating hole 221 to be fixed with the positioning component 2. For example, the fastener 5 is a screw, the mating hole 221 of the positioning component 2 is a threaded hole 31, and the mounting component 1 and the positioning component 2 are fixed by a screw. Among them, the mating hole 221 of the positioning component 2 is provided at the protrusion 22 and the elastic pad 23, that is, part of the mating hole 221 extends from the protrusion 22 into the main body 21 or passes through the main body 21, and part of the mating hole 221 extends from the corresponding position of the main body 21 and the elastic pad 23 into the main body 21 or passes through the main body 21. The position of the through hole 16 of the mounting component 1 corresponds to the position of the mating hole 221.

[0049] In this embodiment, three mating holes 221 may be provided. Two mating holes 221 penetrate the protrusion 22 and the main body 21 in a vertical direction, and one mating hole 221 penetrates the main body 21 and is located at the center of the elastic pad 23. Each end of the mounting member 1 is provided with three through holes 16 corresponding to the three mating holes 221 in the positioning component 2 at that end. Each end of the mounting member 1 is fixedly connected to the positioning component 2 by three fasteners 5.

[0050] Reference Figure 1 and Figure 2The present invention also provides a positioning system, including a treatment platform 200, a positioning fixture and the aforementioned auxiliary positioning device 100.

[0051] The treatment platform 200 has a plane for supporting the patient, and multiple second engaging portions 201 for cooperating with the auxiliary positioning device 100 are respectively provided on opposite sides along its width direction. The treatment platform 200 includes a first side and a second side opposite to each other along its width direction. Multiple second engaging portions 201 are provided on both the first and second sides, and the multiple second engaging portions 201 on the first side correspond one-to-one with the multiple second engaging portions 201 on the second side, forming multiple pairs of second engaging portions 201. Each pair of second engaging portions 201 engages with a pair of positioning components 2 in the auxiliary positioning device 100. The multiple pairs of second engaging portions 201 are arranged sequentially at intervals along the length direction of the treatment platform 200. By engaging the auxiliary positioning device 100 with different second engaging portions 201, the auxiliary positioning device 100 can be fixed at multiple positions on the treatment platform 200.

[0052] Reference Figure 3 In some specific embodiments, the first engaging portion 211 and the second engaging portion 201 can be mutually cooperating arcuate grooves and arcuate protrusions. For example, when the first engaging portion 211 is an arcuate groove and the second engaging portion 201 is an arcuate protrusion, the guide portion 212 on the main body 21 of the auxiliary positioning device 100 can be a guide opening communicating with the arcuate groove. The end of the guide opening away from the arcuate groove is chamfered, and the depth of the guide opening is less than the height of the arcuate protrusion in the vertical direction. When the second engaging portion 201 is an arcuate groove and the first engaging portion 211 is an arcuate protrusion, the guide portion 212 on the main body 21 of the auxiliary positioning device 100 can be a guide cone structure connected to the arcuate protrusion. The cross-sectional area of ​​the guide cone structure gradually decreases along the direction away from the arcuate protrusion. In this embodiment, the first engaging portion 211 is specifically an arcuate groove, and the second engaging portion 201 is specifically an arcuate protrusion.

[0053] When the first snap-fit ​​part 211 and the second snap-fit ​​part 201 snap-fit ​​together, the first snap-fit ​​part 211 and the second snap-fit ​​part 201 are tightly abutted by the elastic deformation of the mounting part 1 in the area where the hollow part 15 is set and the deformation of the main body part 21. The fitting gap formed by the first snap-fit ​​part 211 and the second snap-fit ​​part 201 can be less than 0.03mm.

[0054] The positioning fixture is mounted on the connector 3 of the auxiliary positioning device 100 and fixed to the auxiliary positioning device 100 via the connector 3. For example, the connector 3 is a positioning pin, and the positioning fixture has a pin hole that mates with the connector 3. The connector 3 is connected to the pin shaft of the positioning fixture. The position of the positioning fixture can be adjusted by adjusting the position of the auxiliary positioning device 100 mounted on the treatment platform 200. After the positioning fixture is mounted on the auxiliary positioning device 100, the patient can be fixed on the treatment platform 200, and then the patient can be treated, such as by performing boron neutron capture therapy. Specifically, the positioning fixture is a tool for laser positioning adjustment of the treatment bed.

[0055] In this application, by adopting a convenient installation method in which the positioning component 2 is snapped into the treatment platform 200, the installation of the auxiliary positioning device 100 only takes about 10 seconds per installation. Furthermore, the tight snap-fit ​​between the first snap-fit ​​part 211 and the second snap-fit ​​part 201 ensures that the lateral displacement error of the mounting part 1 after being connected to the treatment platform 200 is less than 0.1mm, effectively improving the positional accuracy of the auxiliary positioning device 100.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. An auxiliary positioning device for installation on a treatment platform (200) and for assisting in positioning the installation of a tooling, characterized in that, The auxiliary positioning device comprises a mounting piece (1), two ends of the mounting piece (1) are respectively connected with positioning assemblies (2), and the mounting piece (1) is clamped on the treatment platform (200) through the positioning assemblies (2); the mounting piece (1) is provided with a recessed groove (11) and a connecting piece (3), an outer contour of the connecting piece (3) is matched with an outer contour of the recessed groove (11), and the connecting piece (3) is partially embedded in the recessed groove (11) to position the connecting piece (3) on the mounting piece (1); the connecting piece (3) is used for being connected with a positioning tool to enable the positioning tool to be mounted on the treatment platform (200).

2. The auxiliary positioning device of claim 1, wherein, The mounting piece (1) comprises a first surface (12) facing the treatment platform (200) and a second surface (13) away from the treatment platform (200); the recessed groove (11) is formed in the second surface (13); the mounting piece (1) is connected with a locking piece (4), the locking piece (4) passes through the mounting piece (1) from the first surface (12) and is fixedly connected with the connecting piece (3).

3. The auxiliary positioning device of claim 2, wherein, The mounting piece (1) is provided with a mounting hole (14) extending from the first surface (12) to the second surface (13), the locking piece (4) is mounted in the mounting hole (14), and an end of the locking piece (4) away from the connecting piece (3) is flush with or recessed in the first surface (12).

4. The auxiliary positioning device of claim 2, wherein, The connecting piece (3) is provided with two, and the two connecting pieces (3) are symmetrically arranged with respect to the center of the mounting piece (1); The connecting piece (3) is threadedly connected with the locking piece (4).

5. The auxiliary positioning device of claim 1, wherein, The end of the mounting piece (1) used for being connected with the positioning assembly (2) is provided with a hollow portion (15) to improve the elastic modulus of the end of the mounting piece (1).

6. The supplemental positioning device of claim 1, wherein, The positioning assembly (2) comprises a main body part (21) used for being clamped with the treatment platform (200) and a protruding part (22) protruding from the main body part (21) to an upper end surface of the mounting piece (1), the protruding part (22) abuts against the mounting piece (1), and an upper end surface of the main body part (21) is spaced from the mounting piece (1).

7. The auxiliary positioning device of claim 6, wherein, The positioning assembly (2) further comprises an elastic pad (23) arranged between the upper end surface of the main body part (21) and the mounting piece (1); The main body part (21) and the protruding part (22) are nylon blocks.

8. The auxiliary positioning device of claim 7, wherein, The positioning assembly (2) and the mounting piece (1) are connected through a fixing piece (5), the fixing piece (5) is arranged at least at a connecting position of the protruding part (22) and the mounting piece (1) and a connecting position of the elastic pad (23) and the mounting piece (1).

9. The auxiliary positioning device of claim 6, wherein, The main body part (21) is provided with a first clamping part (211), and the main body part (21) is clamped on the treatment platform (200) through the first clamping part (211). The main body part (21) is provided with a guide part (212) in front of the first clamping part (211) in the clamping direction, which guides the clamping operation of the main body part (21) and the treatment platform (200).

10. A positioning system, characterized by Comprise: The auxiliary positioning device (100) according to any one of claims 1 to 9, comprising a positioning assembly (2) provided with a first clamping part (211); The treatment platform (200) is provided with a plurality of second clamping parts (201), which are used for clamping with the first clamping part (211), and by clamping different second clamping parts (201) with the first clamping part (211), the auxiliary positioning device (100) is clamped at multiple positions of the treatment platform (200); A positioning tool is installed on the auxiliary positioning device (100), and the positioning tool is used for fixing the patient on the treatment platform (200).

11. The positioning system of claim 10, wherein, The first clamping part (211) and the second clamping part (201) are mutually matched circular arc grooves and circular arc protrusions, and the matching gap formed when the first clamping part (211) and the second clamping part (201) are clamped is 0.03mm or less.

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