CN114714608A - A automatic preforming device of thermoplastic film for being directed at head radiotherapy - Google Patents

Abstract

The invention discloses an automatic thermoplastic film pre-forming device for head radiotherapy, which belongs to the field of body position fixing of patients in clinical radiotherapy, and comprises a press-fitting module for fixing a thermoplastic film, a shaping module for upwards stretching the thermoplastic film and a secondary stretching module for downwards stretching the thermoplastic film, wherein the press-fitting module is positioned at the periphery of the shaping module, and the secondary stretching module is positioned above the shaping module; the shaping module comprises a plurality of main stretching rollers capable of lifting and rotating, and the distance between every two adjacent main stretching rollers is adjustable; the secondary stretching module comprises a plurality of liftable and rotatable secondary stretching rollers, and the plurality of secondary stretching rollers are sequentially arranged along the edge of the thermoplastic film. The invention can effectively solve the problem of uneven stretching of the thermoplastic film, thereby enabling the retraction of the meshes on the thermoplastic film to be consistent in the later period, avoiding the condition of uneven stretching, and enabling the individuation degree, repeatability and reliability of the patient body position fixing to be higher, the treatment effect to be better and the comfort level to be good.

Description

A automatic preforming device of thermoplastic film for being directed at head radiotherapy

Technical Field

The invention belongs to the field of body position fixing of patients in clinical radiotherapy, and particularly relates to an automatic thermoplastic film pre-forming device for head radiotherapy.

Background

Radiotherapy is one of three main treatment methods for tumors, and with the increasing development of radiobiology, radiation physics, computer technology and the like, the radiotherapy enters the precise individual radiotherapy era. In the treatment process, the radiotherapy position is fixed and is one of the key links of guaranteeing to implement accurate radiotherapy technique, and the later stage patient of matter accepts the repeatability and the accuracy of radiotherapy every day, and the patient radiotherapy all need combine together through the thermoplastic film at position fixing device and corresponding irradiation position at every turn, carries out the position of accurate, individuation and fixes, effectively ensures the repeatability and the treatment accuracy of patient radiotherapy position.

The existing thermoplastic films for fixing the body position in radiotherapy all adopt low-temperature thermoplastic memory films made of high polymer materials, the thickness of the low-temperature thermoplastic memory films is about 2-3 mm, the low-temperature thermoplastic memory films are distributed in a mesh shape, and the high-energy X-ray transmittance is required to be high (more than or equal to 99.9%). According to different clinical irradiation position requirements, thermoplastic films with various shapes can be selected and widely applied to the clinical radiotherapy process; meanwhile, the low-temperature thermoplastic memory film can be completely softened at about 65 ℃ generally, and is usually put into 65 ℃ water to be soaked for 3-5 min for softening, two radiotherapy technicians are matched with a hand to stretch the thermoplastic film to enable meshes of the thermoplastic film to deform uniformly as much as possible, then the thermoplastic film is covered on the body surface of a patient, and the individual shaping is carried out according to the body surface bony position pressed out in time. The general thermoplastic film is fished up from hot water, then stretched, covered on the body surface of a patient, and pressed to be plastic, the time of the whole process must be controlled within 15-20 s, then the patient needs to maintain the current position of the body for waiting for about 15-20 min, and after the temperature of the thermoplastic film is reduced, the thermoplastic film is cooled, hardened and molded, so that the fixation of the radiotherapy body position of the patient is realized, and the repeatability and the accuracy of the radiotherapy body position of the patient each time can be further ensured.

At present, the U-shaped thermoplastic film is widely applied to the radiotherapy process of head tumors and is matched with a radiotherapy body position fixing device to fix the focus position of a patient, so that the repeatability and the accuracy of each treatment are ensured. However, after the thermoplastic film is softened, in the process of manually pulling up the thermoplastic film by a radiotherapy technician, because the frame around the head-neck-shoulder positioning film is made of hard plastic, the U-shaped thermoplastic film cannot be directly stretched from two sides during stretching, the existing method only depends on the experience of the radiotherapy technician, according to the actual body position condition of a patient, firstly, the local thermoplastic film is stretched and stretched by hands, then, the thermoplastic film is covered on the head of the patient, and the hard frame around the thermoplastic film is forcibly pressed again to perform secondary stretching by depending on the contact of the thermoplastic film and the body surface, so that the final body position fixing of the patient is completed; however, this kind of mode can not be effectual to thermoplastic film carry out quick, accurate, even whole drawing, make later stage mesh cooling retraction difference great, if thermoplastic film local mesh is tensile too big, can not retract even after the cooling, also do not play the position fixed action, especially above-mentioned press thermoplastic film around the stereoplasm frame carry out the secondary when tensile, probably because patient's health condition (if the body surface has wound, postoperative incision, stoma, fracture, head shoulder portion syncope etc.), the tensile quality of internal heart all can influence thermoplastic film and the fixed effect of position. Even experienced radiotherapy technicians cannot ensure the stretching uniformity of the meshes, and can only achieve the uniform degree of the local thermoplastic film meshes of the patient. Simultaneously, thermoplastic film is through hot water softening back, the first 10 ~ 15min of cooling process is retracted the degree and is the biggest, later retract relatively less, and whole retraction process generally can last 24 hours, if in the fixed in-process of position, the radiotherapy technician is to thermoplastic film tensile inhomogeneous, will lead to later stage mesh to retract inconsistent, consequently probably lead to the radiotherapy patient when using next time, local tight, the chin, shoulder and nose etc. and thermoplastic film space are big, easy activity, fixed effect is poor, radiotherapy shines offset in addition, fixed travelling comfort is not high, fixed effect and poor repeatability, the radiotherapy of later stage is swung the position and is treated precision and reduce etc..

In addition, because the time for completing the stretching process of the thermoplastic film is short for the radiotherapy technician, the radiotherapy technician can only take into account the more critical face thermoplastic film part when manually stretching the thermoplastic film, so that most of the thermoplastic films on the shoulders on both sides of the patient cannot be uniformly stretched, and the stretched and retracted thermoplastic films have large gaps and poorer fixing effect on the shoulders with larger mobility; meanwhile, because the radiotherapy technician does not have unnecessary time to some special patients, for example, there is dark vein implantation pipe, stoma, autogenous cutting, drainage tube, needs to contain the patient of condition such as mouthful stopper in body surface part, if not in time carry out the trompil on thermoplastic film, then can only rely on the manual local thermoplastic film of tearing to draw to carry out the trompil afterwards, will greatly influence the moulding quality of thermoplastic film, lead to patient's physical examination, travelling comfort, fixed and treatment effect poor, especially old patient of seeking medical advice.

At present, in order to solve the problems of uneven stretching, poor fixing effect, poor comfort and the like of the thermoplastic films, improvements have been proposed in the prior art for the thermoplastic films, for example, a head fixing film and a head fixing device are disclosed in the patent application with the application number of 201921914487.9, the head fixing film comprises a frame and a low temperature thermoplastic film, the frame is set to be at least two and jointly encloses a fixing area, and the low temperature thermoplastic film covers the fixing area and connects the frames. Through improving, this head fixation diaphragm can adjust the size of the low temperature thermoplastic film in the fixed region through the size of adjustment fixed region, makes the fixed diaphragm accessible of head increase the size of the low temperature thermoplastic film in the fixed region and reduces the stretch ratio of the low temperature thermoplastic film, prevents that the low temperature thermoplastic film from because of excessive tensile and intensity decline, and fixed effectual. However, the stretching mode of the head fixing film is not changed when in use, so that the problem of local over-stretching of the low-temperature thermoplastic film is not fundamentally solved, and the problems of local tightness, large gap between the chin, the shoulder, the nose and the like and the thermoplastic film, easiness in movement, poor fixing effect and the like cannot be solved.

The patent application with application number 201721302737.4 discloses a radiotherapy location membrane, including location membrane and fixed strake, the location membrane is the low temperature thermoplastic sheet diaphragm, is equipped with the elliptical aperture on the location membrane. Through improving the shape of the hole on the positioning film, the uniformity of the positioning film is improved to a certain extent, and the uneven thickness of the positioning film is effectively reduced. Because the stretching mode of the positioning film is not changed when in use, the problem of local over-stretching of the low-temperature thermoplastic film is not fundamentally solved, and the problems of local tightness, large gap between the chin, the shoulder, the nose and the like and the thermoplastic film, easy movement, poor fixing effect and the like cannot be solved.

The patent application with the application number of 201620514912.5 discloses a radiotherapy positioning body membrane which is used for covering a body part and is provided with a membrane body with meshes, wherein the membrane body comprises an abdominal membrane area covering the abdomen and an abdominal membrane area covering the outside of the abdomen; the abdominal diaphragm area is made of resin bandages, or the resin bandages and the low-temperature thermoplastic plates are alternately distributed in strips at intervals; the peritoneal membrane region is made of a low-temperature thermoplastic plate. The deformation that reduces fixedly through the subregion control to the diaphragm elasticity makes whole tensile more even, improves fixed effect, nevertheless also improves the structure to diaphragm itself in this patent application file, does not fundamentally solve the problem that the local overstretching of low temperature thermoplastic film to can not solve local tight, chin, shoulder and nose etc. and thermoplastic interphragma space big, easy activity, fixed effect subalternation problem.

Therefore, in order to fundamentally solve the problems of uneven stretching, poor fixing effect, poor comfort, local tightness, large gap between the chin, shoulders, nose and the thermoplastic film and the like by changing the stretching mode, an automatic thermoplastic film preforming device for head radiotherapy, which can uniformly prestretch the thermoplastic film, is urgently needed.

Disclosure of Invention

The invention aims to provide an automatic thermoplastic film preforming device for head radiotherapy, which can effectively solve the problem of uneven stretching of a thermoplastic film and avoid the condition of uneven stretching, so that the retraction of meshes on the thermoplastic film at the later stage is kept consistent, the individuation degree, repeatability and reliability of the patient body position fixing are higher, the comfort level is good, the body surface bony mark is more accurate, the treatment effect is improved, and the treatment cost is reduced.

In order to realize the purpose of the invention, the technical scheme is as follows: an automatic thermoplastic film pre-forming device for head radiotherapy comprises a press-mounting module for fixing a thermoplastic film, a shaping module for upwards stretching the thermoplastic film and a secondary stretching module for downwards stretching the thermoplastic film, wherein the press-mounting module is positioned at the periphery of the shaping module, and the secondary stretching module is positioned above the shaping module; the shaping module comprises a plurality of lifting and rotating main stretching rollers, the distance between every two adjacent main stretching rollers is adjustable, the main stretching rollers are divided into two groups, the two groups of main stretching rollers respectively correspond to the top and the face of a patient, the main stretching rollers corresponding to the top of the head of the patient extend transversely, the main stretching rollers corresponding to the face of the patient extend longitudinally, and the length of the transverse extension and the length of the longitudinal extension of the main stretching rollers are different according to the size of the head of the patient; the secondary stretching module comprises a plurality of liftable and rotatable secondary stretching rollers, the plurality of secondary stretching rollers are sequentially arranged along the edge of the thermoplastic film, and bulges are uniformly distributed on the roller surface of the main stretching roller and the roller surface of the secondary stretching roller.

Furthermore, the device also comprises a base, the shaping module and the secondary stretching module are detachably arranged on the base, and the press-mounting module can move on the base.

Furthermore, the shaping module and the secondary stretching module respectively comprise a plurality of liftable supporting structures arranged on the base, and a plurality of main stretching rollers and a plurality of auxiliary stretching rollers are arranged on the supporting structures one by one.

Furthermore, the supporting structure comprises a supporting component arranged on the base and a mounting frame arranged on the supporting component, the mounting frame can swing left and right on the supporting component, and the main stretching roller or the auxiliary stretching roller is rotatably arranged on the mounting frame.

Further, the mounting bracket is U type, and the both ends of mounting bracket all have the grafting axle of relative extension, and the both ends of main stretching roller or the both ends of vice stretching roller rotate respectively and insert and establish on two grafting axles.

Further, the supporting component comprises at least one supporting rod, a clamping jaw I is further installed at the upper end of the supporting rod, and the horizontal section of the installation rack is clamped on the clamping jaw I.

Furthermore, the inner wall of the clamping jaw I is provided with tooth grooves which are uniformly distributed at intervals, and the horizontal section of the mounting frame is provided with a rack matched with the tooth grooves.

Furthermore, the supporting rod in the shaping module is an automatic telescopic rod.

Furthermore, the bracing piece among the secondary drawing module is the U type, and the one end of this bracing piece is inserted and is established the base lateral wall, and the other end at this bracing piece is installed to clamping jaw I, and the vertical section of this bracing piece is automatic telescopic link.

Furthermore, cartridge holes are uniformly distributed on the upper surface of the base and the side surfaces of the base, and the lower ends of the supporting rods are detachably mounted in the cartridge holes.

Further, the press-fitting module comprises a plurality of mounting seats which can be close to or far away from the shaping module, and the plurality of mounting seats are arranged at intervals along the circumferential direction of the thermoplastic film; install on the mount pad with thermoplastic film frame complex clamping jaw II, and clamping jaw II can reciprocate on the mount pad.

Furthermore, a guide rail extending towards the shaping module is further arranged on the base, and a sliding block in sliding fit with the guide rail is arranged on the mounting seat; and the base is also provided with a linear driving mechanism for driving the mounting seat to slide along the guide rail.

Furthermore, the linear driving mechanism comprises a screw rod rotatably supported on the base, a nut matched with the screw rod is further installed on the installation seat, and a driving motor for driving the screw rod to rotate is further installed in the sliding groove.

Furthermore, still install the telescopic cylinder who upwards extends on the mount pad, and clamping jaw II installs the output at telescopic cylinder.

Further, the main stretching rollers in the shaping module are integrally arched, and the camber of the whole main stretching rollers is gradually reduced from the middle of the thermoplastic film to the edge of the thermoplastic film.

The invention has the beneficial effects that:

through the cooperation of the sizing module, the press-mounting module and the secondary stretching module, the positions of the sizing module, the press-mounting module and the secondary stretching module in the thermoplastic film are reasonably arranged, different functions of the sizing module, the press-mounting module and the secondary stretching module are limited, the thermoplastic film is clamped and driven to move up and down through the press-mounting module, the body surface form of a patient can be approximately simulated by the sizing module, the sizing module jacks up the thermoplastic film when the press-mounting module clamps and moves down the thermoplastic film, then the thermoplastic film moves up through the upward movement of the press-mounting module, the press-mounting module loses the stretching of the thermoplastic film, at the moment, the secondary stretching module blocks the upward movement of the thermoplastic film, the secondary stretching module stretches the part of the thermoplastic film which is not stretched by the sizing module again, and after the stretching is finished, the press-mounting module moves down, the thermoplastic film that will accomplish tensile takes off from the pressure equipment module can, through the cooperation between sizing module, pressure equipment module and the secondary tensile module for the form of tensile thermoplastic film after the defervescence and patient's head form laminate more, the repetitious usage of the thermoplastic film of being convenient for improves the rate of utilization, also can improve the radiotherapy effect, reduces treatment cost.

According to the invention, through the matching of the shaping module and the secondary stretching module, the stretching of the thermoplastic film is more uniform, and the stretched thermoplastic film is stretched again without the need of manual operation of a technician, so that the stretched thermoplastic film can be directly covered on the body surface of a patient, and meshes on the thermoplastic film are uniformly retracted, thereby the retraction of the meshes on the thermoplastic film is kept consistent, the fixing effect is good, the patient is more comfortable, the individuation degree, repeatability and reliability of the patient body position fixing are higher, the bone marking on the body surface is more accurate, and the treatment effect is enhanced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic top view of an automated thermoplastic film preforming device for head radiotherapy provided by the present invention;

FIG. 2 is a schematic front view of a sizing module;

FIG. 3 is a side view schematic of a sizing module;

fig. 4 is a partially enlarged view of a portion a of fig. 3;

FIG. 5 is a schematic structural view of the mounting bracket;

FIG. 6 is a schematic top view of a secondary stretching module;

FIG. 7 is a schematic side view of a secondary stretching module;

fig. 8 is a partially enlarged view of a portion B in fig. 7;

fig. 9 is a schematic structural view of the press-fitting module;

FIG. 10 is a schematic top view of the base;

FIG. 11 is a schematic structural view of a main drawing roll and a sub drawing roll;

FIG. 12 is a schematic view of a tapping tool configuration;

FIG. 13 is a schematic view of a thermoplastic film structure.

Reference numbers and corresponding part names in the drawings:

1. the device comprises a base, 2, a press-mounting module, 3, a shaping module, 4, a secondary stretching module, 5 and a tapping cutter;

101. inserting holes;

201. the device comprises a mounting base, 202, a telescopic cylinder, 203, clamping jaws II, 204, guide rails, 205, sliding blocks, 206, a screw rod, 207, nuts, 208 and a driving motor;

301. a main stretching roller 302, a support component 303, a mounting rack 304, a plug shaft 305 and a plug part;

3011. a protrusion;

3021. a supporting rod 3022, clamping jaws I and 3023 and tooth sockets;

3031. a rack;

401. a secondary stretching roller;

501. mounting plate, 502, lower pressure plate, 503, cutting blade, 504, quick-insert block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the present invention provides an automatic thermoplastic film preforming device for radiotherapy of head, comprising a press-fitting module 2, a shaping module 3 and a secondary stretching module 4, wherein the press-fitting module 2 is mainly used for clamping the thermoplastic film (as shown in fig. 13) and driving the thermoplastic film to move up and down, the shaping module 3 is used for substantially simulating the body surface shape of a patient, so that the thermoplastic film is stretched when being pressed on the shaping module 3 by the driving of the shaping module 3, and the secondary stretching module 4 is used for compensating the place where the thermoplastic film is not uniformly stretched by the shaping module 3, so that the thermoplastic film after the primary stretching is pressed on the secondary stretching module 4 by the driving of the shaping module 3, thereby realizing the secondary stretching. During arrangement, the press-fitting module 2 is arranged at the periphery of the shaping module 3, so that after the press-fitting module 2 clamps the thermoplastic film, the thermoplastic film is more uniformly pressed downwards by the press-fitting module 2 in the process of pressing the thermoplastic film downwards; meanwhile, the secondary stretching module 4 is arranged above the shaping module 3, so that the space is not occupied, and the secondary stretching of the thermoplastic film can be realized.

The shaping module 3 comprises a plurality of main stretching rollers 301, the axial direction of the main stretching rollers 301 is consistent with the horizontal direction, the plurality of main stretching rollers 301 are arranged at intervals along the width or/and length direction of the thermoplastic film, and the extending direction of the plurality of main stretching rollers 301 can be determined according to the practical situation, for example, when the thermoplastic film is used for fixing the head of a patient, because the height of the top of the head of the patient and the height of the two sides of the head of the patient are gradually reduced after the patient lies down, in order to simulate different heights of the head of the patient, the main stretching rollers 301 corresponding to the top of the head of the patient can extend along the width direction of the thermoplastic film, and the main stretching rollers 301 corresponding to the face and the two sides of the head of the patient can extend along the length direction of the human body. The distance between two adjacent main stretching rollers 301 can be adjusted, and the main stretching rollers 301 can be lifted, so that before the positioning module is used, the height of the main stretching rollers 301 and the distance between two adjacent main stretching rollers 301 can be adjusted according to the body surface form of a patient, and the shape formed by the main stretching rollers 301 is basically consistent with the form of the patient; simultaneously, a plurality of main stretching rollers 301 all can rotate, and when making the thermoplastic film effect want on the shaping module 3, every main stretching roller 301 all can rotate under the effect that receives the thermoplastic film, and main stretching roller 301 is at the pivoted while, and main stretching roller 301 can drive thermoplastic film synchronous stretching to the drawing that makes the thermoplastic film is more even.

The plurality of main stretching rollers 301 in the shaping module 3 are divided into two groups, the two groups of main stretching rollers 301 respectively correspond to the top and the face of the head of the patient, because the height variation of the top of the head of the patient and the neck of the patient is large, and the length direction of the thermoplastic film is consistent with the height direction of the patient, therefore, the first group of main stretching rollers 301 can extend along the width direction of the thermoplastic film, the second group of main stretching rollers 301 can extend along the length direction of the thermoplastic film, namely, the extending direction between the two adjacent groups of main stretching rollers 301 is vertical, when the thermoplastic film is stretched by the shaping module 3 and covered on the body of the patient, the head of the patient is fixed. In the actual setting process, the number of sets of the main stretching rollers 301 and the arrangement mode of each set of the main stretching rollers 301 can be adjusted according to the position covered by the thermoplastic film. Specifically, in determining the extending direction of the main stretching roller 301, the patient's shape may be referred to, for example, the patient's top of the head is taken as an example, when the patient lies down, the height gradually decreases from the face to the top of the head, and the human body is located at the same height in the lateral direction as viewed from both sides of the top of the head, and at this time, the main stretching roller 301 may extend in the width direction of the thermoplastic film; taking the face of the patient as an example, when the patient lies down, the height of the patient gradually decreases from the left and right sides of the face, and the change from the chin to the forehead is small, the main stretching roller 301 may extend along the length direction of the thermoplastic film. Therefore, the extending direction of the main stretching roller 301 is not consistent when fixing different parts of the patient with respect to the thermoplastic film, and the specific extending direction of the main stretching roller 301 needs to be designed according to the covering position of the thermoplastic film.

The secondary stretching module 4 includes a plurality of secondary stretching rollers 401, the plurality of secondary stretching rollers 401 are all horizontally arranged, and the plurality of secondary stretching rollers 401 can also be lifted and rotated. Because the thermoplastic film is stretched, when the thermoplastic film contacts the sizing module 3, the pulling force applied to the thermoplastic film is mainly concentrated at the sizing module 3 and around the sizing module 3 along with the downward pressing of the thermoplastic film, so that the part of the thermoplastic film pressed on the sizing module 3 and the part around the sizing module 3 start to deform, and the part close to the frame of the thermoplastic film is subjected to a limited pulling force to cause the mesh holes not to be pulled away, therefore, in order to make the frame of the thermoplastic film to be deformed by the pulling force, the axial directions of the plurality of secondary stretching rollers 401 are sequentially arranged along the edge of the thermoplastic film, so that after the stretching of the thermoplastic film is completed by the sizing module 3, the thermoplastic film is acted on the secondary stretching rollers 401 along with the upward movement of the thermoplastic film, the secondary stretching rollers 401 stretch the frame of the thermoplastic film along with the upward movement of the thermoplastic film, thereby achieving the secondary stretching of the entire thermoplastic film.

Through the cooperation of the shaping module 3 and the secondary stretching module 4, the stretching of the thermoplastic film is more uniform, and after the thermoplastic film is covered on the body surface of a patient, the meshes on the thermoplastic film uniformly retract, so that the retraction of the meshes on the thermoplastic film is kept consistent.

In some embodiments, the automatic thermoplastic film preforming device for head radiotherapy further comprises a base 1, wherein the shape of the base 1 can be adjusted according to actual use requirements; meanwhile, the shaping module 3 and the secondary stretching module 4 are both installed on the base 1, the shaping module 3 and the secondary stretching module 4 are both detachably installed on the base 1, a plurality of main stretching rollers 301 in the shaping module 3 and auxiliary stretching rollers 401 in the secondary stretching module 4 can be adjusted in installation position and installation quantity according to the shape of a patient, the press-fitting module 2 can be moved on the base 1, and the press-fitting module 2 is moved on the base 1 to enable the press-fitting module 2 to be close to or far away from the shaping module 3. Because the secondary stretching module 4 is installed on the base 1, and the secondary stretching module 4 is located above the shaping module 3, in order to avoid the installation of the secondary stretching module 4 and the shaping module 3, when the secondary stretching module 4 is arranged, the lower end of the secondary stretching module 4 can only be installed on the periphery of the shaping module 3; meanwhile, in order to conveniently send the thermoplastic film to be stretched into the space between the shaping module 3 and the secondary stretching module 4, one side of the base 1 must be in an open shape, but in order to facilitate the pressure on the thermoplastic film to be more uniform when moving downwards, the press-mounting module 2 needs to be arranged along the periphery of the frame of the thermoplastic film, therefore, the installation requirement of the press-mounting module 2 is combined, the installation requirement of the secondary stretching module 4 and the placement requirement of the thermoplastic film are combined, when the secondary stretching module 4 is installed, a plurality of secondary stretching rollers 401 in the secondary stretching module 4 and the press-mounting module 2 are arranged along the periphery of the frame of the thermoplastic film.

In some embodiments, as shown in fig. 2 to 8, each of the shaping module 3 and the secondary stretching module 4 includes a plurality of support structures installed on the base 1, each of the plurality of support structures is lifted and lowered, and the plurality of support structures are respectively used for supporting the plurality of primary stretching rollers 301 and the plurality of secondary stretching rollers 401, that is, when the support structures are installed, the lower ends of the support structures are detachably installed on the base 1, and the primary stretching rollers 301 or the secondary stretching rollers 401 are rotatably installed at the upper ends of the support structures. Through bearing structure's lift, make a plurality of main stretching rollers 301, a plurality of vice stretching roller 401 realize going up and down to make a plurality of main stretching rollers 301 and a plurality of vice stretching roller 401 highly adjusted, to the form of different patients, adjust the mounting height of different main stretching rollers 301 and vice stretching roller 401, thereby simulate out patient's form, make its form of thermoplastic film after the stretching basically unanimous with patient's form, application scope is wider.

In some embodiments, the support structure includes a support assembly 302 and a mounting frame 303, the support assembly 302 is detachably mounted on the base 1 and extends vertically upwards on the base 1, the mounting frame 303 is mounted on the support assembly 302, the main stretching roller 301 or the auxiliary stretching roller 401 is rotatably mounted on the mounting frame 303, a length direction of the mounting frame 303 extends horizontally, after the mounting frame 303 is mounted on the support assembly 302, the mounting frame 303 swings on the support assembly 302 with an extending direction of the mounting frame 303 as an axis, and the mounting frame 303 drives the main stretching roller 301 or the auxiliary stretching roller 401 to synchronously displace while swinging, so that the main stretching roller 301 or the auxiliary stretching roller 401 displaces horizontally and vertically, thereby changing a distance between two adjacent main stretching rollers 301 and a distance between the main stretching roller 301 and the auxiliary stretching roller 401, and the distance between two adjacent main stretching rollers 301, The distance between the main stretching roller 301 and the auxiliary stretching roller 401 may drive the height of the main stretching roller 301 or the auxiliary stretching roller 401 to change during adjustment, and therefore, in order to ensure the height of the main stretching roller 301 or the auxiliary stretching roller 401, the height of the main stretching roller 301 or the auxiliary stretching roller 401 may be compensated by adjusting the supporting assembly 302. Due to the fact that the distance between two adjacent main stretching rollers 301 and the distance between the main stretching rollers 301 and the auxiliary stretching rollers 401 are adjusted, under the condition that the change of the patient form is small or when the shape of the shaping module 3 needs to be adjusted according to the patient form, the size and the shape of the positioning module can be adjusted by adjusting the distance between the two main stretching rollers 301 or the distance between the main stretching rollers 301 and the auxiliary stretching rollers 401, and the main stretching rollers 301 and the auxiliary stretching rollers 401 can be adjusted more conveniently through the lifting of the supporting assembly 302 and the swinging of the mounting frame 303.

In some embodiments, the mounting bracket 303 is U-shaped, the cross section of the mounting bracket 303 is circular, the horizontal section of the mounting bracket 303 is mounted on the support assembly 302, the two ends of the mounting bracket 303 are both provided with the insertion shafts 304, the two insertion shafts 304 both horizontally extend to the middle of the mounting bracket 303, and the insertion shafts 304 and the mounting bracket 303 are of an integral structure; the two ends of the main stretching roller 301 or the two ends of the auxiliary stretching roller 401 are respectively rotatably inserted on the two insertion shafts 304, so that the main stretching roller 301 and the auxiliary stretching roller 401 can rotate more fully, and the structure of the mounting frame 303 is simpler; simultaneously, because mounting bracket 303 and plug shaft 304 all are the shaft-like, and one side of mounting bracket 303 is the opening form, thereby make mounting bracket 303 have certain elasticity, when main stretching roller 301 or vice stretching roller 401 when the installation, can directly pull mounting bracket 303, it can in two plug shaft 304 to insert the both ends of main stretching roller 301 or vice stretching roller 401 respectively and establish, and after main stretching roller 301 or vice stretching roller 401 are installed and are finished, lose the effort to mounting bracket 303, at this moment, mounting bracket 303 original state, make the installation and the dismantlement of main stretching roller 301 and vice stretching roller 401 more convenient.

In some embodiments, the support assembly 302 includes at least one support rod 3021, the support rod 3021 can be automatically lifted and lowered, and the number of the support rods 3021 in the same support assembly 302 can be adjusted according to the length of the mounting frame 303, i.e., when the main stretching roller 301 or the secondary stretching roller 401 is shorter, the mounting frame 303 is shorter, the number of the support rods 3021 in the support assembly 302 can be one, and when the stretching roller or the secondary stretching roller 401 is longer, the number of the mounting frame 303 is longer, the number of the support rods 3021 in the support assembly 302 can be two or more. When there are a plurality of support rods 3021 in the same support assembly 302, the plurality of support rods 3021 in the same support assembly 302 are arranged at intervals along the horizontal section direction of the mounting block 303, so that the plurality of support rods 3021 in the same support assembly 302 support the mounting block 303 together, thereby making the installation of the main stretching roller 301 and the auxiliary stretching roller 401 more stable; meanwhile, the upper end of the supporting rod 3021 is further provided with a clamping jaw I3022, the clamping jaw I3022 can be formed by hinging two arc-shaped clamping arms through a torsion spring, of course, in order to improve the automation of the clamping jaw I3022, the clamping jaw I3022 can also be provided with an electric clamping jaw I3022 or a pneumatic clamping jaw I3022, when the clamping jaw I3022 is provided with the electric clamping jaw I3022 or the pneumatic clamping jaw I3022, the extending end of the clamping arm of the electric clamping jaw I3022 or the pneumatic clamping jaw I3022 can be arranged in an arc shape, and when the mounting frame 303 is mounted, the clamping jaw I3022 clamps and fixes the horizontal section of the mounting frame 303, so that the mounting and dismounting between the supporting rod 3021 and the mounting frame 303 are more convenient, when the mounting frame 303 needs to be adjusted, the clamping jaw I3022 can be directly opened, and then the swinging direction of the mounting frame 303 can be manually adjusted, and the rear clamping jaw I3022 is fixed from a new clamp. Since the adjustment of the main stretching roller 301 and the auxiliary stretching roller 401 is required before the stretching of the thermoplastic film in the present invention, and the positions of the main stretching roller 301 and the auxiliary stretching roller 401 are kept during the stretching of the thermoplastic film, the stretching of the thermoplastic film is not affected by the structure. Of course, the support assembly 302 may be replaced by a small robotic arm, which may swing the mounting frame 303 while simultaneously lifting and lowering the support rod 3021.

In some embodiments, the teeth grooves 3023 are uniformly spaced on the inner wall of the clamping jaw i 3022, the plurality of teeth grooves 3023 are arranged along the circumferential direction of the clamping jaw i 3022, the horizontal section of the mounting bracket 303 is provided with the rack 3031 matched with the teeth grooves 3023, and the rack 3031 is matched with the teeth grooves 3023, so that after the clamping jaw i 3022 clamps the horizontal section of the mounting bracket 303, the mounting bracket 303 and the clamping jaw i 3022 are more stable, when the thermoplastic film is effectively prevented from being pressed on the main stretching roller 301 or the auxiliary stretching roller 401, the main stretching roller 301 and the auxiliary stretching roller 401 are transmitted to the mounting bracket 303 after being stressed, so that the mounting bracket 303 is tilted, and the stability of the supporting structure is ensured; simultaneously, for the convenience of knowing the swing angle of mounting bracket 303, still can mark the angle line on clamping jaw I3022 to mark the starting point scale on the horizontal segment of mounting bracket 303, when needs adjust the mounting bracket 303 swing, can obtain the swing angle of mounting bracket 303 according to the position that the starting point scale corresponds the scale line on clamping jaw I3022 on mounting bracket 303, make the regulation of mounting bracket 303 more convenient.

In some embodiments, the support rod 3021 of the shaping module 3 is an automatic telescopic rod, which may be a small air cylinder or a small electronic telescopic rod, so that the telescopic operation of the support rod 3021 is more convenient, and the height adjustment of the main stretching roller 301 or the auxiliary stretching roller 401 is more convenient.

In some embodiments, the supporting rod 3021 of the secondary stretching module 4 is U-shaped, one end of the supporting rod 3021 is inserted into the side wall of the base 1, the middle of the supporting rod 3021 is aligned with the height direction of the base 1, the other end of the support rod 3021 extends to the upper part of the shaping module 3, the opening of the clamping jaw I3022 in the extension module faces the shaping module 3, the two ends of the mounting rack 303 extend to the shaping module 3, at this time, in order to ensure the support of the support rod 3021, the vertical section of the support rod 3021 is an automatic telescopic rod, that is, the support rod 3021 of the extension module is formed by respectively installing a horizontally extending link rod at the two ends of the small cylinder or the small electronic telescopic rod, when the secondary stretching module 4 is installed, one connecting rod is installed on the side surface of the base 1, and the other connecting rod is horizontally arranged above the shaping module 3, so that the secondary stretching module 4 occupies a smaller space when being installed. When the size of the base 1 is enough, the support rod 3021 in the secondary stretching module 4 can also be directly set to be L-shaped, at this time, the support rod 3021 is formed by installing a horizontally extending connecting rod at the output end of the small cylinder or the small electronic telescopic rod, when installing, the lower end of the small cylinder or the small electronic telescopic rod is installed on the upper surface of the base 1, and the other connecting rod is horizontally arranged above the shaping module 3.

In some embodiments, as shown in fig. 10, insertion holes 101 are formed on both the upper surface of the base 1 and the side surfaces of the base 1, and the lower end of the support rod 3021 has an insertion part 305, and the lower end of the support rod 3021 is inserted into the insertion hole 101 through the insertion part 305. Since the support rod 3021 of the mold block 3 is attached to the upper surface of the base 1, the axial direction of the insertion portion 305 of the mold block 3 coincides with the axial direction of the support rod 3021; the support rod 3021 of the secondary stretching module 4 is installed on the side wall of the base 1, the support rod 3021 of the secondary stretching module 4 is U-shaped, and the lower end of the support rod 3021 horizontally extends toward the side wall of the base 1, so that the insertion part 305 of the secondary stretching module 4 is located at the lower end of the support rod 3021 and horizontally extends along the lower end of the support rod 3021, and when the shape of the insertion hole 101 of the side wall of the base 1 is matched with the lower end of the support rod 3021, the lower end of the support rod 3021 of the secondary stretching module can be directly inserted into the insertion hole 101. Through the matching of the inserting holes 101 and the inserting parts 305, the supporting rod 3021 is more conveniently installed, the supporting rod 3021 can be adjusted according to the installation position of the main stretching roller 301 or the auxiliary stretching roller 401 during installation, and the flexibility of the installation of the main stretching roller 301 and the auxiliary stretching roller 401 is higher.

In some embodiments, as shown in fig. 9, the press-fitting module 2 comprises a plurality of mounting seats 201, and the plurality of mounting seats 201 are arranged at intervals along the frame of the thermoplastic film or symmetrically arranged along the central axis of the thermoplastic film, but in order to ensure that the thermoplastic film is subjected to a more uniform force all around when moving downward, it is preferable that the plurality of mounting seats 201 are arranged at intervals along the frame of the thermoplastic film. A plurality of said mounting seats 201 can be close to or far from the shaped module 3 on the base 1, so that when the thermoplastic film is positioned above the shaped module 3, the plurality of mounting seats 201 are close to or far from the thermoplastic film; meanwhile, the mounting base 201 is also provided with a clamping jaw II 203, the clamping jaw II 203 can move up and down on the mounting base 201, the clamping jaw II 203 can directly adopt a clamping jaw II 203 cylinder, when a plurality of mounting bases 201 are all close to the positioning module, a thermoplastic film can be placed on a plurality of clamping jaws II 203 together at the moment, and the thermoplastic film can be clamped through a plurality of clamping jaws II 203 together, so that the thermoplastic film is fixed and moves up and down through a plurality of clamping jaws II 203 together, thereby realizing the up and down movement of the thermoplastic film, because the main stretching roller 301 and the auxiliary stretching roller 401 can not move up and down after being mounted, when the thermoplastic film moves up and down, the thermoplastic film continues to move down after being pressed on the main stretching roller 301, the thermoplastic film realizes primary stretching, when the thermoplastic film is pressed on the auxiliary stretching roller 401 after being stretched once and then moves up, the thermoplastic film continues to move up and move up on the auxiliary stretching roller 401, the secondary stretching is realized to the thermoplastic film, not only makes the thermoplastic film need not artifical the participation at stretching process, and makes the thermoplastic film atress more even at stretching process, makes the stretching of thermoplastic film more even.

In some embodiments, the base 1 is further provided with a guide rail 204, the guide rail 204 extends toward the sizing module 3, and the bottom of the mounting seat 201 is further provided with sliders 205 slidably fitted with the guide rail 204, the number of the sliders 205 may be twice that of the guide rail 204, so that the two sliders 205 are slidably fitted with the same guide rail 204, and the base 1 is more stable in the sliding process; meanwhile, a linear driving mechanism for driving the mounting seat 201 to slide along the guide rail 204 is further installed on the base 1, and the mounting seat 201 is driven by the linear driving mechanism to reciprocate, so that the reciprocating motion of the mounting seat 201 is more convenient.

In some embodiments, the linear driving mechanism includes a screw 206 rotatably supported on the base 1, an axial direction of the screw 206 is consistent with an axial direction of the sliding rail, a nut 207 matched with the screw 206 is further installed on a bottom surface of the mounting seat 201, a driving motor 208 for driving the screw 206 to rotate is further installed on the base 1, the screw 206 is driven to rotate by rotation of the driving motor 208, and the nut 207 performs linear motion on the screw 206 when the screw 206 rotates by matching of the screw 206 and the nut 207, so that the mounting seat 201 is driven. Here, the linear driving mechanism may be replaced by a rack and pinion 3031 structure or directly by an air cylinder.

In some embodiments, the mounting base 201 is further provided with a telescopic cylinder 202 extending upwards, the lower end of the telescopic cylinder 202 is fixedly mounted on the mounting base 201, and the clamping jaw ii 203 is fixedly mounted at the output end of the telescopic cylinder 202, so that the up-and-down movement of the clamping jaw ii 203 is more convenient. Here, the telescopic cylinder 202 may be replaced by a linear driving element such as an electric telescopic rod or a hydraulic cylinder.

The press-fitting module 2 can also adopt a two-dimensional mechanical arm which can feed along the Z direction and the Y direction, and when the two-dimensional mechanical arm is adopted, the clamping jaw II 203 can be directly arranged at the execution end of the two-dimensional mechanical arm; meanwhile, in the present invention, in order to quickly read the heights of the main stretching roller 301 and the sub stretching roller 401, scale marks may be engraved on the piston rod of the telescopic cylinder 202 or the output shaft of the support rod.

In some embodiments, since the plurality of main stretching rollers 301 are mainly used for simulating the shape of the patient, but the head, the shoulder, etc. of the patient are all basically in the shape with the middle high edge low, in order to make the shape simulated by the plurality of main stretching rollers 301 together with the shape of the patient closer to the shape of the patient, when the plurality of main stretching rollers 301 in the sizing module 2 are used for simulating the shape of the human body together, the height of each main stretching roller 301 in the sizing module 2 is not equal, and the body edge of the human is lower, therefore, after the plurality of main stretching rollers 301 are arranged, the upper surface formed by the plurality of main stretching rollers 301 together is arched, specifically, the height in the sizing module 2 can be gradually reduced from the middle of the thermoplastic film to the edge of the thermoplastic film, so that the shape simulated by the plurality of main stretching rollers 301 together with the shape of the patient is closer, and the finally stretched thermoplastic film is closer to the shape of the patient under the condition that the thermoplastic film is stretched uniformly, when the thermoplastic film is covered on the body surface of a patient, the thermoplastic film can not be stretched again, so that the patient feels more comfortable.

In some embodiments, the roll surface of the primary stretching roll 301 and the roll surface of the secondary stretching roll 401 are uniformly provided with protrusions 3011, as shown in fig. 11, the protrusions 3011 are arc-shaped, and the size of the protrusions 3011 is not larger than the mesh size of the thermoplastic film in the unstretched condition, so that when the thermoplastic film is pressed on the primary stretching roll 301 or the secondary stretching roll 401, the protrusions 3011 enter the meshes of the thermoplastic film, and when the thermoplastic film continues to move downwards or upwards, the rotation of the primary stretching roll 301 and the secondary stretching roll 401 is synchronized with the stretching of the thermoplastic film through the cooperation of the protrusions 3011 and the tucking, so that after the thermoplastic film is pressed on the primary stretching roll 301 and the secondary stretching roll 401, the portion of the thermoplastic film pressed on the primary stretching roll 301 and the secondary stretching roll 401 is continuously stretched through the rotation of the primary stretching roll 301 and the secondary stretching roll 401, thereby the stretching of the thermoplastic film is more uniform.

When the thermoplastic film needs to be pre-stretched, the body surface shape of the patient is measured, wherein the body surface shape comprises the width and the height of the face, the width and the height of the lower handle, the width and the height of the neck, the width and the height of the shoulders and the like, the number, the arrangement mode and the installation height of the main stretching rollers 301 and the auxiliary stretching rollers 401 are determined according to the measured height, the distance between two adjacent main stretching rollers 301 and the horizontal distance between the main stretching rollers 301 and the auxiliary stretching rollers 401 are simultaneously driven, the position of the supporting rod 3021 is determined according to the arrangement of the main stretching rollers 301 and the auxiliary stretching rollers 401, after the determination, the inserting part 305 at the lower end of the supporting rod 3021 is inserted into the inserting hole 101 on the base 1, the installation frame of the supporting rod 3021 and the installation frame of the supporting rod 3021 are determined according to the distance between two adjacent main stretching rollers 301 or the horizontal distance between the main stretching rollers 301 and the auxiliary stretching rollers 401, after the determination of the inclination angle, the assembled main stretching roller 301 or the assembled auxiliary stretching roller 401 is clamped and fixed by a clamping jaw I3022 on the supporting rod 3021, and the steps are repeated, so that the plurality of main stretching rollers 301 in the shaping module 3 and the plurality of auxiliary stretching rollers 401 in the secondary stretching module 4 are jointly installed.

The plurality of driving motors 208 rotate in the forward direction, the plurality of driving motors 208 respectively drive the screw rods 206 to rotate, the nuts 207 advance on the screw rods 206 while the screw rods 206 rotate, the mounting seats 201 advance synchronously while the nuts 207 advance through the matching of the sliding blocks 205 and the guide rails 204, the mounting seats 201 approach the positioning module simultaneously, and when the mounting seats 201 move to a fixed position, the driving motors 208 stop rotating.

Put into hot water with the thermoplastic film and soak to after the thermoplastic film soaks, insert the thermoplastic film between main stretching roller 301 and vice stretching roller 401, and make the frame of thermoplastic film correspond with a plurality of clamping jaws II 203, start a plurality of clamping jaws II 203 simultaneously, a plurality of clamping jaws II 203 carry out the centre gripping to the frame of thermoplastic film jointly, make the thermoplastic film fixed by the centre gripping.

Start a plurality of telescopic cylinder 202 simultaneously, make a plurality of telescopic cylinder 202 contract jointly, a plurality of telescopic cylinder 202 drive to a clamping jaw II 203 synchronous downstream, make the thermoplastic film downstream of the common centre gripping of a plurality of clamping jaws II 203, thermoplastic film is at the in-process of downstream, thermoplastic film's middle part is pressed earlier and is established at main stretching roller 301's top, along with telescopic cylinder 202's continuation shrink, thermoplastic film continues downstream, thermoplastic film is stretched in the downstream process, thermoplastic film is in tensile while, main stretching roller 301 synchronous revolution, make thermoplastic film middle part by the uniform stretching.

A plurality of telescopic cylinder 202 stretch out simultaneously, a plurality of telescopic cylinder 202 drive to a plurality of clamping jaws II 203 synchronous upward movement, make the common thermoplastic film of centre gripping of a plurality of clamping jaws II 203 break away from a plurality of main stretching roller 301 upward movements, thermoplastic film is at the in-process of upward movement, thermoplastic film's edge pressure is established on vice stretching roller 401, along with stretching out of telescopic cylinder 202's continuation, thermoplastic film continues upward movement, thermoplastic film upward movement in-process is stretched, thermoplastic film is in tensile, vice stretching roller 401 synchronous revolution, make thermoplastic film edge by even stretching.

After the thermoplastic film is stretched, the plurality of telescopic cylinders 202 are reset synchronously, the plurality of telescopic cylinders 202 drive the plurality of clamping jaws II 203 to reset synchronously, the stretched thermoplastic film is moved between the main stretching roller 301 and the auxiliary stretching roller 401, the thermoplastic film is pulled artificially, the plurality of clamping jaws II 203 lose clamping to the thermoplastic film together, a radiotherapy technician takes off the thermoplastic film, the plurality of driving motors 208 rotate in opposite directions, the plurality of driving motors 208 drive the screw 206 to rotate respectively, the screw 206 rotates while the nut 207 retreats on the screw 206, through the matching of the sliding block 205 and the guide rail 204, the mounting seats 201 are retreated synchronously while the nut 207 retreats, the plurality of mounting seats 201 are reset simultaneously, and the driving motors 208 stop rotating after the plurality of mounting seats 201 are reset.

Finally, the removed thermoplastic film is immediately covered on the body of the patient, and the frame of the thermoplastic film is fixed on the examining table.

When the thermoplastic film is stretched, the size of the shaping module 3 can be adjusted by adjusting the installation height and the installation distance of the main stretching roller 301 and the horizontal distance between the auxiliary stretching roller 401 and the main stretching roller 301, so that the stretching degree of the thermoplastic film pre-stretching can be changed for patients with different body types. Meanwhile, the secondary stretching module 4 in the invention can also adjust the number of the secondary stretching rollers 401 and the distance between two adjacent secondary stretching rollers 401 according to the actual stretching condition in the setting process.

When the thermoplastic film is stretched secondarily by the secondary stretching roller 401, because the supporting rod 302 in the secondary stretching module 4 is U-shaped or L-shaped, and the mounting rack 303 has a certain height, the mounting rack 303 in the secondary stretching module 4 can extend downwards after being mounted on the horizontal section of the supporting rod 302, so that the roller surface of the secondary stretching roller 401 has a certain distance with the horizontal section of the upper end of the supporting rod 302, when the thermoplastic film moves upwards under the driving of the press-fitting module 2, the thermoplastic film corresponds to the secondary stretching roller 401, and the hard frame of the thermoplastic film is located between the secondary stretching roller 401 and the vertical section of the supporting rod 302, therefore, when the press-fitting module 2 drives the thermoplastic film to move upwards, the upper end of the supporting rod 302 in the secondary stretching module 4 cannot hinder the upward movement of the thermoplastic film.

The automatic thermoplastic film pre-forming device for radiotherapy on the head provided by the invention has the advantages that in the pre-stretching process of the thermoplastic film, in order to further reduce the labor intensity of the medical staff and improve the working efficiency of the medical staff, the invention can also be provided with a hole opening device, the tapping device can be directly mounted on the base 1, and specifically, the tapping device can be formed by a manipulator (not shown in the figure) mounted on the base 1 and a tapping tool 5, the tapping tool 5 has a structure as shown in fig. 12, and comprises a mounting plate 501, a lower pressing plate 502 and a cutting blade 503 which are coaxially and radially arranged at intervals are mounted on the lower surface of the mounting plate 501, and the lower pressing plate 502 is located inside the cutting blade 503, meanwhile, in order to facilitate the mounting and dismounting between the slotting tool 5 and the manipulator, a fast insert 504 matched with the manipulator can be mounted on the mounting plate 501, and the fast insert 504 can be directly used as a fast insert on a clamp used by the existing manipulator.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the invention. Other variations or modifications will be apparent to persons skilled in the art in light of the above disclosure and which are within the scope of the invention.

Claims (10)

1. An automatic thermoplastic film preforming device for head radiotherapy is characterized by comprising a press-mounting module (2) for fixing a thermoplastic film, a shaping module (3) for stretching the thermoplastic film upwards and a secondary stretching module (4) for stretching the thermoplastic film downwards, wherein the press-mounting module (2) is positioned at the periphery of the shaping module (3), and the secondary stretching module (4) is positioned above the shaping module (3); the shaping module (3) comprises a plurality of main stretching rollers (301) which can be lifted and rotated, the distance between every two adjacent main stretching rollers (301) can be adjusted, the main stretching rollers (301) are divided into two groups, the two groups of main stretching rollers (301) respectively correspond to the top and the face of a patient, the main stretching rollers (301) corresponding to the top of the head of the patient transversely extend, the main stretching rollers (301) corresponding to the face of the patient longitudinally extend, and the transverse extension length and the longitudinal extension length of the main stretching rollers (301) are different according to the size of the head of the patient; the secondary stretching module (4) comprises a plurality of liftable and rotatable secondary stretching rollers (401), the secondary stretching rollers (401) are sequentially arranged along the edge of the thermoplastic film, and bulges (3011) are uniformly distributed on the roller surface of the main stretching roller (301) and the roller surface of the secondary stretching roller (401).

2. The automatic thermoplastic film preforming device for radiotherapy to the head according to claim 1, further comprising a base (1), wherein the shaping module (3) and the secondary stretching module (4) are detachably mounted on the base (1), and the press-fitting module (2) is movable on the base (1); preferably, the shaping module (3) and the secondary stretching module (4) comprise a plurality of liftable supporting structures arranged on the base (1), and the plurality of main stretching rollers (301) and the plurality of auxiliary stretching rollers (401) are arranged on the plurality of supporting structures one by one.

3. Automatic thermoplastic film preforming device for radiotherapy to the head according to claim 2, characterized in that said supporting structure comprises a supporting assembly (302) mounted on the base (1) and a mounting frame (303) mounted on the supporting assembly (302), the mounting frame (303) being swingable left and right on the supporting assembly (302), and the primary stretching roller (301) or the secondary stretching roller (401) being rotatably mounted on the mounting frame (303).

4. The automatic thermoplastic film preforming device for radiotherapy to head according to claim 3, characterized in that the mounting frame (303) is U-shaped, and both ends of the mounting frame (303) are provided with oppositely extending insertion shafts (304), and both ends of the main stretching roller (301) or both ends of the auxiliary stretching roller (401) are respectively rotatably inserted on the two insertion shafts (304); preferably, the support assembly (302) comprises at least one support rod (3021), a clamping jaw I (3022) is further mounted at the upper end of the support rod (3021), and the horizontal section of the mounting rack (303) is clamped on the clamping jaw I (3022).

5. The automatic thermoplastic film preforming device for head radiotherapy according to claim 4, characterized in that the inner wall of the clamping jaw I (3022) is provided with uniformly spaced splines (3023), and the horizontal section of the mounting frame (303) is provided with a rack (3031) engaged with the splines (3023); preferably, the supporting rod (3021) in the shaping module (3) is an automatic telescopic rod.

6. The automatic pre-molding device of thermoplastic film for radiotherapy of head as claimed in claim 4, characterized in that the supporting rod (3021) in the secondary stretching module (4) is U-shaped, one end of the supporting rod (3021) is inserted into the side wall of the base (1), the clamping jaw i (3022) is installed at the other end of the supporting rod (3021), and the vertical section of the supporting rod (3021) is an automatic telescopic rod; preferably, plug-in mounting holes (101) are uniformly distributed on the upper surface of the base (1) and the side surface of the base (1), and the lower end of the supporting rod (3021) is detachably mounted in the plug-in mounting holes (101).

7. The automatic pre-forming device for thermoplastic films for radiotherapy to the head according to any one of claims 2 to 6, characterized in that the press-fitting module (2) comprises a plurality of mounting seats (201) which can be close to or far from the shaping module (3), and the plurality of mounting seats (201) are arranged at intervals along the circumference of the thermoplastic films; install on mount pad (201) with thermoplastic film frame complex clamping jaw II (203), and clamping jaw II (203) can reciprocate on mount pad (201).

8. The automatic thermoplastic film preforming device for radiotherapy to the head according to claim 7, characterized in that the base (1) is further provided with a guide rail (204) extending towards the shaping module (3), and the mounting seat (201) is provided with a slide block (205) slidably engaged with the guide rail (204); the base (1) is also provided with a linear driving mechanism for driving the mounting seat (201) to slide along the guide rail (204); preferably, the linear driving mechanism comprises a screw rod (206) rotatably supported on the base (1), a nut (207) matched with the screw rod (206) is further mounted on the mounting seat (201), and a driving motor (208) for driving the screw rod (206) to rotate is further mounted in the sliding groove.

9. The automatic thermoplastic film preforming device for radiotherapy to head according to claim 7, characterized in that a telescopic cylinder (202) extending upwards is further installed on the mounting seat (201), and a clamping jaw II (203) is installed at an output end of the telescopic cylinder (202).

10. The automatic pre-forming device for thermoplastic films for radiotherapy to the head according to any one of claims 2 to 6, characterized in that the plurality of main stretching rollers (301) in the shaping module (3) are integrally arched, and the camber of the plurality of main stretching rollers (301) is gradually reduced from the middle of the thermoplastic film to the edge of the thermoplastic film.

Images