Retractor mounting structure

Abstract

The utility model discloses a kind of retractor mounting structures.The retractor mounting structure of the utility model includes retractor and fixed support, and retractor defines first passage;Fixed support includes support main body, first adjusting part and first abutment piece, one end of first abutment piece includes first abutment part, the other end is arranged in support main body and is connected with first adjusting part, and support main body is connected with retractor;Support main body is also defined with second abutment part, and any one of first abutment part and second abutment part is abutted on the inner wall surface of skull, the other is abutted on the outer wall surface of skull, and, first abutment piece is configured as: by the drive of first adjusting part, first abutment part can be compared with second abutment part away or close to.The retractor mounting structure can be more quickly and conveniently installed and fixed with skull.

Description

Technical Field

[0001] This utility model relates to the field of surgical instruments, and in particular to a retractor mounting structure. Background Technology

[0002] Endoscopic minimally invasive drainage of intracranial hemorrhage involves using a skull drill to create a bone window (approximately 2.5-3.5 cm in diameter) at the site of the hematoma's projection on the skull. A retractor is then manually inserted into the hematoma cavity, providing a channel for the neuroendoscope to reach the hematoma. The neuroendoscope serves to illuminate and observe hemostasis, and, in conjunction with a suction device, removes blood clots. Compared to traditional open craniotomy, endoscopic minimally invasive surgery offers advantages such as less trauma, shorter operation time, fewer complications, and faster recovery, making it a minimally invasive alternative to existing open craniotomy for hematoma evacuation.

[0003] In related technologies, retractors are often fixed by a three-point surgical head frame. However, the installation of the surgical head frame is often quite troublesome. After the surgical head frame is installed, the retractor needs to be installed on the surgical head frame and positioned and calibrated. The whole process is time-consuming, increases the workload of medical staff, and is not conducive to improving surgical efficiency. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a retractor installation structure that enables relatively quick and convenient installation and fixation with the skull.

[0005] The puller mounting structure according to a first aspect embodiment of the present invention includes:

[0006] A retractor that defines a first channel;

[0007] A fixed bracket includes a bracket body, a first adjusting member, and a first abutting member. One end of the first abutting member includes a first abutting portion, and the other end passes through the bracket body and is connected to the first adjusting member. The bracket body is connected to the puller.

[0008] The support body further defines a second abutment portion, wherein either the first abutment portion or the second abutment portion abuts against the inner wall surface of the skull, and the other abuts against the outer wall surface of the skull. Furthermore, the first abutment portion is configured to be driven by the first adjustment member to move away from or closer to the second abutment portion.

[0009] The puller mounting structure according to the embodiment of this utility model has at least the following beneficial effects:

[0010] The retractor installation structure of this scheme is relatively simple and has a low manufacturing cost. During use, the retractor can be fixed simply by abutting and clamping the fixation bracket against the skull around the bone window. The operation is quick and efficient, greatly improving surgical efficiency. Furthermore, this structure is compact and does not occupy much space in the surgical area, making it particularly suitable for ventriculoscopic surgeries where necessary instruments already occupy a significant portion of the surgical area.

[0011] According to some embodiments of the present invention, the support body defines a first through hole, the fixed support includes a rotating member located in the first through hole, the rotating member is connected to the puller, and the rotating member is configured to have a first state in which it can rotate relative to the support body, and a second state in which it is fixed relative to the support body.

[0012] According to some embodiments of the present invention, the bracket body is provided with a second through hole communicating with the first through hole, and the fixed bracket further includes a second adjusting member passing through the second through hole. The second adjusting member is configured to extend relative to the hole wall of the first through hole and abut against the rotating member to keep the rotating member in the second state.

[0013] According to some embodiments of the present invention, the outer peripheral surface of the rotating member is provided with a plurality of limiting holes, and the second adjusting member can be inserted into any of the limiting holes to limit the rotation of the rotating member.

[0014] According to some embodiments of the present invention, the wall of the first through hole is defined by a first protrusion and a second protrusion, the first protrusion and the second protrusion are spaced apart along the axial direction of the first through hole, and a portion of the rotating member is located between the first protrusion and the second protrusion and abuts against the first protrusion and the second protrusion respectively, so as to limit the displacement of the rotating member along the axial direction of the first through hole.

[0015] According to some embodiments of the present invention, the outer peripheral surface of the rotating member defines at least one deformation groove extending along the axial direction of the rotating member, the rotating member defines a third through hole through which the puller passes, the deformation groove penetrates the rotating member and communicates with the third through hole;

[0016] The rotating member is configured to undergo elastic deformation, thereby reducing its outer diameter to fit between the first protrusion and the second protrusion.

[0017] According to some embodiments of the present invention, the bracket body includes a mounting portion, the mounting portion defining a fourth through hole extending along the axial direction of the puller, and the first abutting member passing through the fourth through hole.

[0018] According to some embodiments of the present invention, the mounting portion further defines a fifth through hole extending radially along the retractor, the fifth through hole communicating with the fourth through hole; the fixing bracket further includes a third adjusting member passing through the fifth through hole and connected to the first abutting member, the third adjusting member being configured to drive the first abutting member to move radially along the retractor.

[0019] According to some embodiments of the present utility model, the bracket body includes a plurality of mounting portions arranged along its circumference, wherein at least one of the mounting portions is connected to the third adjusting member, and the mounting portion provided with the third adjusting member is designated as the first mounting portion, and the remaining mounting portions are designated as the second mounting portions;

[0020] The first mounting part is connected to two second abutting parts, which are spaced apart.

[0021] According to some embodiments of the present invention, the puller is made of a transparent material.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the retractor installation structure according to an embodiment of the present utility model;

[0025] Figure 2 This is an exploded view of the fixing bracket according to an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the support body according to an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the rotating component according to an embodiment of the present invention.

[0028] Figure label:

[0029] Retractor 100; First channel 110;

[0030] Fixed bracket 200; bracket body 210; second abutment part 211; first through hole 212; first protrusion 2121; second protrusion 2122; second through hole 213; mounting part 214; first mounting part 2141; second mounting part 2142; fourth through hole 215; fifth through hole 216; first adjusting member 220; first abutment member 230; first abutment part 231; rotating member 240; limiting hole 241; deformation groove 242; third through hole 243; second adjusting member 250; third adjusting member 260; Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0033] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Endoscopic minimally invasive drainage of intracranial hemorrhage involves using a skull drill to create a bone window (approximately 2.5-3.5 cm in diameter) at the site of the hematoma's projection on the skull. A retractor is then manually inserted into the hematoma cavity, providing a channel for the neuroendoscope to reach the hematoma. The neuroendoscope serves to illuminate and observe hemostasis, and, in conjunction with a suction device, removes blood clots. Compared to traditional open craniotomy, endoscopic minimally invasive surgery offers advantages such as less trauma, shorter operation time, fewer complications, and faster recovery, making it a minimally invasive alternative to existing open craniotomy for hematoma evacuation.

[0037] In related technologies, retractors are often fixed using a three-point surgical head frame. However, the installation of the surgical head frame is often quite complicated. After installing the head frame, the retractor needs to be installed, positioned, and calibrated. The entire process is time-consuming. For example, the installation of the existing three-point surgical head frame requires two people and takes more than 10 minutes to complete, while the installation of the retractor takes more than 20 minutes. For minimally invasive drainage surgery for intracranial hemorrhage under neuroendoscopy, which has a shorter duration (generally around 40 minutes), the time spent installing the supporting equipment is close to the overall surgical procedure time. The installation and adjustment of the retractor increases the workload of medical staff and is not conducive to improving surgical efficiency.

[0038] To address the aforementioned problems, this application proposes a retractor mounting structure, such as... Figure 1 and Figure 2 As shown, the retractor mounting structure includes a retractor 100 and a fixing bracket 200. The retractor 100 is a hollow structure, with a first channel 110 defined inside for medical equipment such as neuroendoscopes and suction devices to pass through. The fixing bracket 200 is used to fix it to the skull and provides a stable mounting base for the retractor 100. Specifically, the fixing bracket 200 includes a bracket body 210, a first adjusting member 220, and a first abutting member 230, as shown... Figure 1 and Figure 2 As shown, the support body 210 has a ring-shaped structure, and the retractor 100 is installed through the support body 210 and connected to the support body 210. The first abutment 230 has an L-shaped structure, with its upper end inserted through the support body 210 and connected to the first adjusting member 220. The lower end of the first abutment 230 includes a first abutment portion 231, which extends radially away from the retractor 100. The lower end of the first abutment 230 can extend into the skull through the bone window and abut against the inner wall of the skull through the first abutment portion 231.

[0039] The support body 210 also includes a second abutment portion 211, such as Figure 1 and Figure 2As shown, the second abutment portion 211 is correspondingly provided with the first abutment portion 231. The support body 210 includes an annular main body portion and a mounting portion 214 protruding from the main body portion. The second abutment portion 211 is connected to the bottom of the mounting portion 214 and extends outward. The first abutment member 230 is provided through the mounting portion 214, and the first abutment portion 231 is located at the lower end of the second abutment portion 211 and is spaced apart from the second abutment portion 211. Thus, the fixing bracket 200 can be provided through the bone window, with the first abutment portion 231 located inside the skull and the second abutment portion 211 located outside the skull. Then, driven by the first adjusting member 220, the first abutment portion 231 can move relative to the support body 210 along the axial direction of the retractor 100, so that the first abutment portion 231 can move closer to or further away from the second abutment portion 211.

[0040] When the fixation bracket 200 is installed, the first abutment part 231 is inserted into the skull, and the second abutment part 211 abuts against the outer wall of the skull. Then, the first adjustment member 220 is adjusted so that the first abutment part 231 moves toward the second abutment part 211 until it abuts against the inner wall of the skull. Thus, the first abutment part 231 and the second abutment part 211 clamp the skull therein, thereby realizing the installation and fixation of the fixation bracket 200 on the skull.

[0041] It is understandable that, depending on the size and structure of the first abutment portion 231 and the second abutment portion 211, the fixing bracket 200 may be provided with one set of the first abutment portion 231 and the second abutment portion 211, or it may be provided with multiple sets of the first abutment portion 231 and the second abutment portion 211. In such cases... Figure 1 In the embodiment shown, the fixed bracket 200 includes three sets of first abutment portions 231 and second abutment portions 211. The three sets of first abutment portions 231 and second abutment portions 211 are distributed circumferentially along the bracket body 210, forming a stable triangular structure.

[0042] Additionally, it should be noted that, in cases such as Figure 1 In the illustrated embodiment, the first abutting portion 231 is used to abut against the inner wall surface of the skull, and the second abutting portion 211 is used to abut against the outer wall surface of the skull. In other embodiments, the second abutting portion 211 may be used to abut against the inner wall surface of the skull, and the first abutting portion 231 may be used to abut against the outer wall surface of the skull.

[0043] Additionally, the first adjusting member 220 and the first abutting member 230 can be connected by means of... Figure 2The adjustment is achieved through a threaded connection. The first adjusting member 220 has a threaded outer circumference at its top. The first adjusting member 220 has a nut-like structure, fitted onto the top of the first abutting member 230 and abutting against the support body 210. When the first adjusting member 220 rotates, the first abutting member 230, threadedly connected to it, is driven to move upwards or downwards. Alternatively, the first adjusting member 220 and the first abutting member 230 can also be a screw-slider structure. The first adjusting member 220 has a threaded screw, and the first abutting member 230 is fitted onto the screw and threadedly connected to it, so that rotation of the first adjusting member 220 drives movement of the first abutting member 230. The first adjusting member 220 can also be a driving component such as a motor or air pump, whose output shaft can extend and retract along the axial direction of the puller 100, thereby driving movement of the first abutting member 230.

[0044] The adjustable design of the first abutment 230 facilitates the installation of the fixing bracket 200 and provides good applicability. In this application, the adjustable stroke of the first abutment 230 in the vertical direction is 0-11.8 mm, thereby accommodating skull thicknesses of 3-15 mm.

[0045] Based on the above, the retractor installation structure of this solution is relatively simple and has a low manufacturing cost. During use, the retractor 100 can be fixed simply by abutting and clamping the fixation bracket 200 against the skull around the bone window. The operation is quick and efficient, greatly improving surgical efficiency. Furthermore, this structure is compact and does not occupy much space in the surgical area, making it particularly suitable for ventriculoendoscopic surgeries where necessary instruments already occupy a significant portion of the surgical area.

[0046] In some embodiments (not shown in the figures), the support body 210 defines a first through hole 212, and the retractor 100 passes through the first through hole 212 and is directly connected and fixed to the support body 210. It is understood that this type of retractor mounting structure has fewer components, lower cost, less flexibility in adjustment, and enables rapid installation. In other embodiments, such as... Figures 1 to 3 As shown, the retractor 100 also requires adjustable angle. Therefore, the retractor mounting structure is modified accordingly. For example, a rotating member 240 is provided in the first through hole 212, and the rotating member 240 is connected to the retractor 100. That is, the retractor 100 is mounted in the first through hole 212 via the rotating member 240. It should be noted that the rotating member 240 and the retractor 100 can be as follows: Figure 2 The two independent components shown are connected into an integral structure by means of connection such as socketing or bonding. Alternatively, the rotating component 240 and the retractor 100 can also be an integral structure (not shown in the figure). For example, the rotating component 240 is formed in the middle of the retractor 100 during the manufacturing process.

[0047] Understandably, since the rotating component 240 has an approximately circular structure, the retractor 100 can not only rotate axially around the first through-hole 212 within it, but also oscillate relative to the axis of the first through-hole 212. For example, when the hematoma area is larger than the area of ​​the end of the retractor 100 inserted into the hematoma cavity, the retractor 100 can be adjusted to tilt at a certain angle, thereby expanding its coverage area and facilitating the operation of instruments such as neuroendoscopy and suction devices. After the tilt angle of the retractor 100 is adjusted, it needs to be locked to prevent changes in the tilt angle of the retractor 100 during surgery from causing surgical risks. Therefore, the rotating member 240 connected to the retractor 100 is configured to have a first state in which it can rotate relative to the support body 210, in which the retractor 100 can swing relative to the support body 210 to allow the rotating member 240 to rotate in the first through hole 212, and a second state in which it is fixed relative to the support body 210, in which the retractor 100, the rotating member 240 and the support body 210 are connected as an integral structure and the rotational freedom of the rotating member 240 is restricted.

[0048] Furthermore, such as Figure 2 and Figure 3 As shown, the outer peripheral wall of the annular support body 210 is provided with a second through hole 213, which extends through and communicates with the first through hole 212. The fixed support 200 also includes a second adjusting member 250 passing through the second through hole 213, thereby allowing the second adjusting member 250 to extend relative to the second through hole 213 and abut against the rotating member 240 to hold the rotating member 240 in a second state. Figures 1 to 3 In the embodiment shown, the second adjusting member 250 is threadedly connected to the second through hole 213, so that the second adjusting member 250 can be extended or retracted by the rotation of the second adjusting member 250.

[0049] Furthermore, such as Figure 4 As shown, the outer periphery of the rotating member 240 is provided with multiple limiting holes 241, and the second adjusting member 250 can be inserted into any of the limiting holes 241, thereby restricting the rotation of the rotating member 240. In this application, the tilt angle of the retractor 100 can be adjusted up to a maximum of 5°.

[0050] In some embodiments, to limit the displacement of the rotating member 240 and prevent it from falling out of the first through hole 212, the wall of the first through hole 212 is provided with a first protrusion 2121 and a second protrusion 2122, which are spaced apart along the axial direction of the first through hole 212. It should be noted that the first protrusion 2121 and the second protrusion 2122 can be continuous strip-shaped protrusions extending circumferentially along the first through hole 212, or they can be block-shaped protrusions. Figure 3 As shown, the first protrusion 2121 located on the lower side is configured as a strip-shaped protrusion, and the second protrusion 2122 located on the upper side is configured as a block-shaped protrusion. A portion of the rotating member 240 is disposed between the first protrusion 2121 and the second protrusion 2122, and abuts against the first protrusion 2121 and the second protrusion 2122 respectively, thereby restricting the axial displacement of the rotating member 240 along the first through hole 212. It can be understood that the maximum outer diameter of the rotating member 240 is smaller than the inner diameter of the first through hole 212 where the first protrusion 2121 is located, and also smaller than the inner diameter of the first through hole 212 where the second protrusion 2122 is located. Therefore, the displacement of the rotating member 240 is restricted by the first protrusion 2121 and the second protrusion 2122 respectively. That is, the projection areas of the first protrusion 2121 and the second protrusion 2122 along the axial direction of the first through hole 212 fall within the projection area of ​​the rotating member 240.

[0051] Furthermore, to facilitate the installation of the rotating member 240 between the first protrusion 2121 and the second protrusion 2122, the outer periphery of the rotating member 240 defines at least one deformation groove 242 extending axially along the rotating member 240, and the rotating member 240 defines a third through hole 243 through which the puller 100 passes, the deformation groove 242 communicating with the wall of the third through hole 243. Figure 4 In the illustrated embodiment, three deformation grooves 242 are evenly distributed on the rotating member 240, dividing the rotating member 240 into three parts. Each part can elastically deform in the axial direction of the rotating member 240, so that the outer diameter of the rotating member 240 can be reduced until it can be inserted between the first protrusion 2121 and the second protrusion 2122. Then the rotating member 240 returns to its elastic deformation and is constrained in the first through hole 212 by the first protrusion 2121 and the second protrusion 2122.

[0052] In some embodiments, the bracket body 210 includes a mounting portion 214, which defines a fourth through hole 215 extending axially along the first through hole 212, and a first abutment 230 passes through the fourth through hole 215.

[0053] Furthermore, the mounting portion 214 also includes a fifth through hole 216 extending radially along the first through hole 212, the fifth through hole 216 communicating with the fourth through hole 215. The fixing bracket 200 also includes a third adjusting member 260, which passes through the fifth through hole 216 and is connected to the first abutment member 230. The third adjusting member 260 is capable of driving the first abutment member 230 to move radially along the first through hole 212.

[0054] It should be noted that the function of the third adjusting member 260 is to adjust the distance between the axis of the first abutment member 230 and the axis of the first through hole 212, thereby adjusting the applicable range of the fixation bracket 200. For example, when the hematoma area is large and the bone window is large, the third adjusting member 260 can be used to move the first abutment member 230 away from the axis of the first through hole 212, so that the fixation bracket 200 can pass through the bone window and abut against the skull around the bone window. In this application, the adjustable stroke of the first abutment member 230 is 0-5mm, which can be applied to bone windows of 28-33mm.

[0055] The support body 210 includes a plurality of mounting portions 214 arranged circumferentially thereon, wherein at least one mounting portion 214 is connected to a third adjusting member 260, such as Figure 3 In the illustrated embodiment, there are three mounting portions 214, one of which is connected to a third adjusting member 260. For ease of distinction, the mounting portion 214 connected to the third adjusting member 260 is designated as the first mounting portion 2141, and the remaining mounting portions 214 are designated as second mounting portions 2142. The first mounting portion 2141 is connected to two second abutment portions 211, which are spaced apart. Figure 2 As shown, since the first mounting part 2141 has the feature of adjustable stroke, in order to match the range of the first abutment 230, two second abutment parts 211 are arranged at intervals and extend in opposite directions.

[0056] It should be noted that, as Figure 2 As shown, the fourth through hole 215 of the first mounting portion 2141 is strip-shaped, extending radially along the first through hole 212 to provide space for the movement of the first abutment 230. The fifth through hole 216 is also strip-shaped, extending axially along the first through hole 212 to provide space for the movement of the third adjusting member 260. Figure 2 In the illustrated embodiment, the first abutment member 230 disposed in the first mounting portion 2141, in addition to having a screw extending axially along the first through hole 212 (for connection with the first adjusting member 220), also has a screw extending radially along the first through hole 212 (for connection with the third adjusting member 260). Thus, the lower end of the fifth through hole 216 is open, allowing the first abutment member 230 to pass through the first mounting portion 2141. It can be understood that the fourth through hole 215 of the second mounting portion 2142 can be as follows: Figure 2 The circular hole shown.

[0057] In some embodiments, the retractor 100 is made of a transparent material so that medical personnel can observe the use of the equipment in the retractor 100.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A retractor mounting structure, characterized in that, include: A retractor that defines a first channel; A fixed bracket includes a bracket body, a first adjusting member, and a first abutting member. One end of the first abutting member includes a first abutting portion, and the other end passes through the bracket body and is connected to the first adjusting member. The bracket body is connected to the puller. The support body further defines a second abutment portion, wherein either the first abutment portion or the second abutment portion abuts against the inner wall surface of the skull, and the other abuts against the outer wall surface of the skull. Furthermore, the first abutment portion is configured to be driven by the first adjustment member to move away from or closer to the second abutment portion.

2. The retractor mounting structure according to claim 1, characterized in that, The support body defines a first through hole, and the fixed support includes a rotating member located in the first through hole. The rotating member is connected to the puller and is configured to have a first state in which it can rotate relative to the support body and a second state in which it is fixed relative to the support body.

3. The retractor mounting structure according to claim 2, characterized in that, The main body of the bracket is provided with a second through hole communicating with the first through hole. The fixed bracket also includes a second adjusting member passing through the second through hole. The second adjusting member is configured to extend relative to the hole wall of the first through hole and abut against the rotating member to keep the rotating member in the second state.

4. The retractor mounting structure according to claim 3, characterized in that, The outer circumferential surface of the rotating component is provided with a plurality of limiting holes, and the second adjusting component can be inserted into any of the limiting holes to limit the rotation of the rotating component.

5. The retractor mounting structure according to claim 2, characterized in that, The wall of the first through hole is defined by a first protrusion and a second protrusion, which are spaced apart along the axial direction of the first through hole. A portion of the rotating member is located between the first protrusion and the second protrusion and abuts against the first protrusion and the second protrusion respectively, so as to limit the displacement of the rotating member along the axial direction of the first through hole.

6. The retractor mounting structure according to claim 5, characterized in that, The outer peripheral surface of the rotating member defines at least one deformation groove extending along the axial direction of the rotating member, and the rotating member defines a third through hole through which the puller passes, the deformation groove penetrating the rotating member and communicating with the third through hole; The rotating member is configured to undergo elastic deformation, thereby reducing its outer diameter to fit between the first protrusion and the second protrusion.

7. The retractor mounting structure according to claim 1, characterized in that, The bracket body includes a mounting portion, which defines a fourth through hole extending along the axial direction of the puller, and the first abutment member passes through the fourth through hole.

8. The retractor mounting structure according to claim 7, characterized in that, The mounting portion further defines a fifth through hole extending radially along the retractor, the fifth through hole communicating with the fourth through hole; the fixing bracket further includes a third adjusting member passing through the fifth through hole and connected to the first abutting member, the third adjusting member being configured to drive the first abutting member to move radially along the retractor.

9. The retractor mounting structure according to claim 8, characterized in that, The main body of the bracket includes a plurality of mounting portions arranged along its circumference, wherein at least one of the mounting portions is connected to the third adjusting member, and the mounting portion provided with the third adjusting member is designated as the first mounting portion, and the remaining mounting portions are designated as the second mounting portions. The first mounting part is connected to two second abutting parts, which are spaced apart.

10. The retractor mounting structure according to claim 1, characterized in that, The puller is made of a transparent material.

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