CN114129914B

CN114129914B - Patient position fixing device for tumor radiotherapy

Info

Publication number: CN114129914B
Application number: CN202111433204.0A
Authority: CN
Inventors: 孙薇; 唐宁; 罗华军
Original assignee: Cancer Center of Guangzhou Medical University
Current assignee: Cancer Center of Guangzhou Medical University
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-05-24
Anticipated expiration: 2041-11-29
Also published as: CN114129914A

Abstract

The invention belongs to the technical field of tumor radiotherapy auxiliary equipment, and particularly relates to a patient posture fixing device for tumor radiotherapy, which comprises a base, a lifting unit and a bed body, wherein the base, the lifting unit and the bed body are sequentially arranged from bottom to top; an arc-shaped non-woven fabric is fixedly connected in a groove formed in the top of the bed body; a partition board is fixedly connected with the corresponding position of the non-woven fabric in the bed body, a molten pool is arranged in the bed body at the bottom of the partition board, a heating wire is arranged at the bottom of the molten pool, and the molten pool is filled with hot melt adhesive; a group of sliding rods are uniformly distributed on the partition plate, penetrate through the partition plate and are in sliding connection with the partition plate, one end of each sliding rod props against the non-woven fabric, and the other end of each sliding rod extends into the molten pool; the sliding rod is controlled to slide up and down through the driving unit; according to the invention, the hot melt adhesive in the molten pool is heated and softened by the electric heating wires, then the patient lies on the non-woven fabric and extrudes the slide bar, and the slide bar highly fits and supports different body types of the patient after sliding, so that the comfort level of the patient is increased, the chemotherapy accuracy is increased, and unnecessary radiation damage is reduced.

Description

Patient position fixing device for tumor radiotherapy

Technical Field

The invention belongs to the technical field of tumor radiotherapy auxiliary equipment, and particularly relates to a patient position fixing device for tumor radiotherapy.

Background

Tumor radiotherapy is a local treatment for tumors using radiation. Need stabilize the location to the patient when patient's radiotherapy to accurate radiation therapy that carries out reduces the influence to patient's normal organ.

A chinese patent with publication number CN213667599U discloses a tumor radiotherapy auxiliary device, which comprises an auxiliary splint, wherein one side of the auxiliary splint is provided with a lifting auxiliary plate, the right side of the auxiliary splint is provided with a movable radiotherapy centralized box, the bottom of the auxiliary splint is fixedly connected with a radiotherapy supporting plate, the top of the auxiliary splint is fixedly connected with a first radiotherapy auxiliary plate, and the top of the first radiotherapy auxiliary plate is provided with a second radiotherapy auxiliary plate and a radiotherapy medicine box.

Fix a position the patient through porous thermoplastic net among the prior art, and then carry out accurate location when repeating the chemotherapy to the patient, nevertheless because the bed body shape is fixed, be difficult to adapt to the comfortable fixed of different patients ' size, simultaneously at the chemotherapy in-process, the patient need keep certain posture longer time, but long-time fixed increase patient's discomfort easily, be unfavorable for patient's stable fixed and accurate chemotherapy.

Therefore, the invention provides a patient position fixing device for tumor radiotherapy.

Disclosure of Invention

To remedy the deficiencies of the prior art, at least one of the technical problems set forth in the background is addressed.

The technical scheme adopted by the invention for solving the technical problems is as follows: the patient position fixing device for tumor radiotherapy comprises a base, a lifting unit and a bed body which are sequentially arranged from bottom to top; an arc-shaped non-woven fabric is fixedly connected in a groove formed in the top of the bed body; a partition board is fixedly connected with the corresponding position of the non-woven fabric in the bed body, a molten pool is arranged in the bed body at the bottom of the partition board, a heating wire is arranged at the bottom of the molten pool, and the molten pool is filled with hot melt adhesive; a group of sliding rods are uniformly distributed on the partition plate, penetrate through the partition plate and are in sliding connection with the partition plate, one end of each sliding rod props against the non-woven fabric, and the other end of each sliding rod extends into the molten pool; the sliding rod is controlled to slide up and down through the driving unit; when the bed is in operation, a patient is positioned through the porous thermoplastic net in the prior art, and then the patient is accurately positioned when the chemotherapy is repeated, but the bed body is fixed in shape and is difficult to adapt to comfortable fixation of body types of different patients, meanwhile, in the chemotherapy process, the patient needs to keep a certain posture for a long time, but the discomfort of the patient is easily increased after the patient is fixed for a long time, and the stable fixation and the accurate chemotherapy of the patient are not facilitated, at the moment, the hot melt adhesive in a molten pool is heated and softened through the electric heating wires, then the patient lies on the non-woven fabric and extrudes the sliding rods, so that the sliding rods at different positions slide for different distances and then highly fit and support different body types of the patient, the comfort level of the patient is increased, the discomfort and the shaking of the patient in the chemotherapy process are reduced, the fixing effect of the bed body on the patient is further increased, and the patient is kept comfortably and stably fixed on the bed body for a long time, further increasing the accuracy of chemotherapy and reducing unnecessary radiation damage.

Preferably, the driving unit comprises a compressor arranged in the lifting unit, and the compressor is communicated with the position, close to the top, of the molten pool through a hose; a sliding pipe is fixedly connected to the position, corresponding to the sliding rod, of the partition plate, and the sliding rod penetrates through the sliding pipe; the diameter of the slide rod is smaller than the inner diameter of the slide pipe, a piston is connected in the slide pipe in a sliding and sealing manner, and the piston is fixedly connected with the slide rod; through compressor to holding in the pond air feed and upwards jack-up piston for the even atress of every piston further increases the slide bar and to patient's support effect, increases the wholeness that the slide bar removed, further reduces actuating mechanism's arranging, simplifies the mechanism, guarantees the stability of slide bar, reduces the slide bar protrusion and the top injury patient of local position simultaneously.

Preferably, a group of coiled pipes are uniformly distributed in the molten pool, the upper end and the lower end of each coiled pipe are respectively connected with an air inlet pipe and an air outlet pipe, and the air inlet pipes are communicated with a compressed carbon dioxide gas tank through electromagnetic valves; after the patient lies flat and tentatively fixes, open the solenoid valve and let in compressed carbon dioxide to the coiled pipe, and then reduce the molten bath temperature fast through carbon dioxide expansion heat absorption for the solidification rate of hot melt adhesive further reduces the slide bar dead time, increases chemotherapy efficiency.

Preferably, the partition plate is provided with a vent hole, one side of the vent hole close to the molten pool is hermetically connected with an elastic membrane, and the middle part of one side of the elastic membrane close to the molten pool is hinged with a connecting rod; a single-pole double-throw switch is fixedly connected with the position, corresponding to the vent hole, in the partition plate, a handle of the single-pole double-throw switch is hinged with the end part of the connecting rod, and the single-pole double-throw switch is connected with the electromagnetic valve and the compressor through a lead; after the air pressure in the molten pool rises, the single-pole double-throw switch is switched on the electromagnetic valve, and simultaneously, the power supply of the compressor is switched off; after the air pressure in the molten pool rises and pushes the slide rod to slide upwards and be attached to the back of a patient, the elastic membrane is upwards swelled, so that the single-pole double-throw switch switching circuit enables the electromagnetic valve to be opened to introduce carbon dioxide, the compressor is cut off to work simultaneously, and the fixing efficiency of the slide rod is increased.

Preferably, the two sides of the molten pool close to the upper part are rotatably connected with a driving wheel and a driven wheel through a support, the driving wheel is driven to rotate through a personal service motor, and an annular rope is sleeved between the driving wheel and the driven wheel; the middle part of the rope is fixedly connected with a spraying platform, the top of the spraying platform is provided with a spray head, and the spraying platform sprays the separant through the spray head; drive the spraying platform through the action wheel and carry out horizontal migration and spout the separant for the patient spouts the separant to the slide bar bottom when not lying down, reduces the adhesion of slide bar and hot melt adhesive, further increases the slip efficiency of restoring to the throne of slide bar, increases slide bar top and patient's support laminating effect.

Preferably, the spraying platform corresponding to the periphery of the nozzle is provided with an annular backflow groove; one side of the spraying platform is fixedly connected with a group of bristles through a brush plate, and the bristles do not influence the normal spraying of the spray head; brush through the brush hair to slide bar bottom periphery, further increase the cladding integrity of separant to the slide bar, the separation agent that unnecessary overflowed on slide bar and the brush board is retrieved to the backward flow groove simultaneously, reduces extravagantly, reduces simultaneously that the separation agent sneaks into in the hot melt adhesive and influences the bonding support effect that solidifies.

Preferably, one side of the top of the spraying platform, which is far away from the brush plate, is hinged with an arc plate through a first rotating pin, and the arc plate and the brush plate are symmetrical about the center of the spray head; one side of the top of the arc-shaped plate, which is far away from the first rotating pin, is fixedly connected with a second rotating pin; the bottom of the partition board is provided with a sliding chute corresponding to the rope, and the sliding chute is provided with an arc-shaped part corresponding to the sliding pipe; the second rotating pin is embedded into the sliding groove and is in sliding connection with the sliding groove; walk around the slide bar when drawing the arc portion through the arc, later the brush hair is applied paint with a brush to the slide bar again for hit after the brush hair draws the slide bar and hit and beat in the arc side, reduce the bounce-back of brush hair and throw off the isolating agent, further reduce the waste of isolating agent and during isolating agent sneaks into the hot melt adhesive.

Preferably, an electric push rod is fixedly connected to the partition plate on one side of the slide rod, an output end of the electric push rod is fixedly connected with a push rod, and a wedge block is fixedly connected to the position, close to the slide rod, of the push rod; the sliding rod is tightly extruded after the wedge block slides, the sliding rod is preliminarily fixed, the influence of slight movement of a patient on the positioning effect of the sliding rod is reduced, the empty window period during the cooling of the hot melt adhesive is filled, the supporting effect of the hot melt adhesive after solidification on the sliding rod is further increased, and the fitting degree of the top of the sliding rod and the body shape of the patient is kept.

Preferably, the ejector rod is an elastic rod, an arc-shaped groove is formed in one side, close to the sliding rod, of the wedge-shaped block, and the diameter of the arc-shaped groove is larger than that of the sliding rod; the slide bar is clamped into the arc-shaped groove, and the temporary fixing efficiency of the support of the slide bar is further improved by matching with the elastic deformation of the ejector rod.

Preferably, one side of the wedge-shaped block, which is close to the slide rod, is fixedly connected with a rubber layer, and the rubber layer completely wraps the side face of the wedge-shaped block, which is close to the slide rod; the top of the sliding rod is fixedly connected with a group of elastic bulges; through the rubber layer deformation and extrusion slide bar, further prevent becoming flexible of wedge and slide bar, utilize the frictional force on rubber layer to drive the slide bar rotation simultaneously, the cooperation is protruding to massage the patient, further increases the comfort level of patient in fixed process.

The invention has the following beneficial effects:

1. according to the patient position fixing device for tumor radiotherapy, hot melt adhesive in a molten pool is heated and softened through the electric heating wires, then a patient lies on the non-woven fabric and extrudes the slide rods, so that the slide rods at different positions slide for different distances and then highly fit and support different body types of the patient, the comfort level of the patient is increased, discomfort and shaking of the patient in the chemotherapy process are reduced, the fixing effect of a bed body on the patient is further increased, the patient is kept comfortably and stably fixed on the bed body for a long time, the chemotherapy accuracy is further increased, and unnecessary radiation damage is reduced.

2. According to the patient position fixing device for tumor radiotherapy, the periphery of the bottom end of the sliding rod is brushed by the bristles, the coating integrity of the isolating agent on the sliding rod is further increased, meanwhile, the excessive overflowing isolating agent on the sliding rod and the brush plate is recycled by the backflow groove, waste is reduced, and the influence of the isolating agent mixed in hot melt adhesive on the solidification bonding supporting effect is reduced.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view taken at A-A in FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is a view taken along line C of FIG. 4;

FIG. 6 is a schematic view of the spray platform and the curved plate of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 2 at D;

in the figure: the device comprises a base 1, a lifting unit 11, a bed body 12, non-woven fabrics 13, a partition plate 14, a molten pool 15, a heating wire 16, a sliding rod 17, a compressor 18, a hose 19, a sliding pipe 2, a piston 21, a coiled pipe 22, a vent hole 23, an elastic membrane 24, a connecting rod 25, a single-pole double-throw switch 26, a driving wheel 27, a driven wheel 28, a rope 29, a spraying platform 3, a spray head 31, a reflux groove 32, a brush plate 33, bristles 34, a first rotating pin 35, an arc-shaped plate 36, a second rotating pin 37, a sliding groove 38, an arc-shaped part 39, an electric push rod 4, a push rod 41, a wedge-shaped block 42, an arc-shaped groove 43 and a rubber layer 44.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Example one

As shown in fig. 1 and 3, a patient posture fixing device for tumor radiotherapy according to an embodiment of the present invention includes a base 1, a lifting unit 11 and a bed 12, which are sequentially arranged from bottom to top; an arc-shaped non-woven fabric 13 is fixedly connected in a groove formed in the top of the bed body 12; a partition plate 14 is fixedly connected with the corresponding position of the non-woven fabric 13 in the bed body 12, a molten pool 15 is arranged in the bed body 12 at the bottom of the partition plate 14, a heating wire 16 is arranged at the bottom of the molten pool 15, and hot melt adhesive is filled in the molten pool 15; a group of sliding rods 17 are uniformly distributed on the partition plate 14, the sliding rods 17 penetrate through the partition plate 14 and are in sliding connection with the partition plate 14, one end of each sliding rod 17 props against the non-woven fabric 13, and the other end of each sliding rod 17 extends into the molten pool 15; the sliding rod 17 is controlled to slide up and down through a driving unit; during operation, the patient is positioned through the porous thermoplastic net in the prior art, and then the patient is accurately positioned when the chemotherapy is repeated, but the bed body 12 is fixed in shape and is difficult to adapt to comfortable fixation of body types of different patients, and meanwhile, in the chemotherapy process, the patient needs to keep a certain posture for a long time, but the discomfort of the patient is easily increased when the patient is fixed for a long time, which is not beneficial to the stable fixation and accurate chemotherapy of the patient, at the moment, the hot melt adhesive in the molten pool 15 is heated and softened through the electric heating wire, then the patient lies on the non-woven fabric 13 and extrudes the sliding rod 17, so that the sliding rods 17 at different positions slide for different distances and then highly fit and support different body types of the patient, the comfort level of the patient is increased, the discomfort and the shaking of the patient in the chemotherapy process are reduced, the fixing effect of the bed body 12 on the patient is further increased, and the patient is kept comfortably and stably fixed on the bed body 12 for a long time, further increasing the accuracy of chemotherapy and reducing unnecessary radiation damage.

As shown in fig. 4, the driving unit comprises a compressor 18 disposed in the elevating unit 11, the compressor 18 being communicated with the molten pool 15 near the top through a hose 19; a sliding pipe 2 is fixedly connected to the position, corresponding to the sliding rod 17, of the partition plate 14, and the sliding rod 17 penetrates through the sliding pipe 2; the diameter of the slide rod 17 is smaller than the inner diameter of the slide pipe 2, a piston 21 is connected in the slide pipe 2 in a sliding and sealing mode, and the piston 21 is fixedly connected with the slide rod 17; the compressor 18 supplies air to the containing pool and jacks up the pistons 21, so that each piston 21 is uniformly stressed, the supporting effect of the sliding rod 17 on a patient is further increased, the moving integrity of the sliding rod 17 is increased, the arrangement of a driving mechanism is further reduced, the mechanism is simplified, the stability of the sliding rod 17 is ensured, and meanwhile, the protrusion of the sliding rod 17 at a local position is reduced and the patient is jacked.

As shown in fig. 3, a group of coiled pipes 22 are uniformly distributed in the molten pool 15, the upper end and the lower end of each coiled pipe 22 are respectively connected with an air inlet pipe and an air outlet pipe, and the air inlet pipes are communicated with a compressed carbon dioxide gas tank through electromagnetic valves; after the patient lies flat and is preliminarily fixed, the solenoid valve is opened to introduce compressed carbon dioxide into the coiled pipe 22, so that the temperature of the molten pool 15 is quickly reduced through the expansion and heat absorption of the carbon dioxide, the curing speed of the hot melt adhesive is accelerated, the fixing time of the slide rod 17 is further shortened, and the chemotherapy efficiency is increased.

As shown in fig. 4, a vent hole 23 is formed in the partition plate 14, an elastic membrane 24 is hermetically connected to one side of the vent hole 23 close to the molten pool 15, and a connecting rod 25 is hinged to the middle of one side of the elastic membrane 24 close to the molten pool; a single-pole double-throw switch 26 is fixedly connected with the position, corresponding to the vent hole 23, in the partition plate 14, a handle of the single-pole double-throw switch 26 is hinged with the end part of the connecting rod 25, and the single-pole double-throw switch 26 is connected with the electromagnetic valve and the compressor 18 through a lead; after the air pressure in the molten pool 15 rises, the single-pole double-throw switch 26 is switched on the electromagnetic valve, and simultaneously, the power supply of the compressor 18 is switched off; after the air pressure in the molten pool 15 rises to push the sliding rod 17 to slide upwards and be attached to the back of a patient, the elastic membrane 24 bulges upwards, so that the circuit is switched by the single-pole double-throw switch 26, the electromagnetic valve is opened to introduce carbon dioxide, the compressor 18 is cut off to work, and the fixing efficiency of the sliding rod 17 is increased.

A driving wheel 27 and a driven wheel 28 are rotatably connected to two sides of the molten pool 15 close to the upper part through a support, the driving wheel 27 is driven to rotate through a personal service motor, and an annular rope 29 is sleeved between the driving wheel 27 and the driven wheel 28; the middle part of the rope 29 is fixedly connected with a spraying platform 3, the top of the spraying platform 3 is provided with a spray head 31, and the spraying platform 3 sprays the separant through the spray head 31; drive spraying platform 3 through action wheel 27 and carry out horizontal migration and spout the separant for the patient sprays the separant to slide bar 17 bottom when not lying down, reduces the adhesion of slide bar 17 and hot melt adhesive, further increases slide bar 17's slip efficiency of resetting, increases slide bar 17 top and patient's support laminating effect.

As shown in fig. 3 to 6, an annular backflow groove 32 is formed on the spraying platform 3 corresponding to the periphery of the nozzle 31; one side of the spraying platform 3 is fixedly connected with a group of bristles 34 through a brush plate 33, and the bristles 34 do not influence the normal spraying of the spray head 31; the brush bristles 34 are used for brushing the periphery of the bottom end of the sliding rod 17, the coating integrity of the isolating agent on the sliding rod 17 is further increased, meanwhile, the excessive overflowing isolating agent on the sliding rod 17 and the brush plate 33 is recycled by the backflow groove 32, waste is reduced, and meanwhile, the influence of the isolating agent mixed in hot melt adhesive on solidification bonding supporting effect is reduced.

One side of the top of the spraying platform 3, which is far away from the brush plate 33, is hinged with an arc plate 36 through a first rotating pin 35, and the arc plate 36 and the brush plate 33 are in central symmetry with respect to the spray head 31; a second rotating pin 37 is fixedly connected to one side of the top of the arc-shaped plate 36, which is far away from the first rotating pin 35; the bottom of the partition board 14 is provided with a sliding chute 38 at a position corresponding to the rope 29, and the sliding chute 38 is provided with an arc-shaped part 39 at a position corresponding to the sliding pipe 2; the second rotating pin 37 is embedded into the sliding groove 38 and is in sliding connection with the sliding groove 38; the arc-shaped plate 36 bypasses the sliding rod 17 when scratching the arc-shaped part 39, and then the brush bristles 34 brush the sliding rod 17, so that the brush bristles 34 scratch the sliding rod 17 and then hit the side surface of the arc-shaped plate 36, the rebound and throwing-off of the brush bristles 34 is reduced, and the waste of the isolating agent and the mixing of the isolating agent into the hot melt adhesive are further reduced.

Example two

As shown in fig. 2 and 7, a first comparative example, in which another embodiment of the present invention is:

an electric push rod 4 is fixedly connected to the partition plate 14 on one side of the slide rod 17, an output end of the electric push rod 4 is fixedly connected with a push rod 41, and a wedge block 42 is fixedly connected to the position, close to the slide rod 17, of the push rod 41; slide bar 17 is squeezed tight through wedge 42 slip back, carries out preliminary fixed to slide bar 17, reduces the patient and slightly removes the positioning effect influence to slide bar 17, and the empty window period when filling the hot melt adhesive cooling further increases the hot melt adhesive after the solidification to slide bar 17's support effect, keeps the laminating degree of slide bar 17 top and patient's size.

The ejector rod 41 is an elastic rod, an arc-shaped groove 43 is formed in one side, close to the sliding rod 17, of the wedge-shaped block 42, and the diameter of the arc-shaped groove 43 is larger than that of the sliding rod 17; the sliding rod 17 is clamped into the arc-shaped groove 43, and the supporting temporary fixing efficiency of the sliding rod 17 is further increased by matching with the elastic deformation of the ejector rod 41.

The side of the wedge-shaped block 42 close to the slide rod 17 is fixedly connected with a rubber layer 44, and the rubber layer 44 wraps the side of the wedge-shaped block 42 close to the slide rod 17 completely; the top of the sliding rod 17 is fixedly connected with a group of elastic bulges; the rubber layer 44 deforms and extrudes the sliding rod 17, so that the wedge-shaped block 42 and the sliding rod 17 are further prevented from loosening, meanwhile, the sliding rod 17 is driven to rotate by the friction force of the rubber layer 44, the protrusion is matched to massage a patient, and the comfort degree of the patient in the fixing process is further improved.

When the bed body is in work, the hot melt adhesive in the molten pool 15 is heated and softened by the electric heating wires, then a patient lies on the non-woven fabric 13 and extrudes the slide bars 17, so that the slide bars 17 at different positions slide for different distances and then highly fit and support different body types of the patient, the comfort level of the patient is increased, discomfort and shaking of the patient in the chemotherapy process are reduced, the fixing effect of the bed body 12 on the patient is further increased, the patient is kept comfortably and stably fixed on the bed body 12 for a long time, the chemotherapy accuracy is further increased, and unnecessary radiation damage is reduced; the compressor 18 supplies air to the containing pool and jacks up the pistons 21, so that each piston 21 is uniformly stressed, the supporting effect of the slide bar 17 on a patient is further increased, the moving integrity of the slide bar 17 is increased, the arrangement of a driving mechanism is further reduced, the mechanism is simplified, the stability of the slide bar 17 is ensured, and the protrusion of the slide bar 17 at a local position and the patient bruising caused by jacking are reduced; after the patient lies flat and is preliminarily fixed, the solenoid valve is opened to introduce compressed carbon dioxide into the coiled pipe 22, so that the temperature of the molten pool 15 is quickly reduced through the expansion and heat absorption of the carbon dioxide, the solidification speed of the hot melt adhesive is accelerated, the fixing time of the sliding rod 17 is further shortened, and the chemotherapy efficiency is increased; after the air pressure in the molten pool 15 rises and pushes the sliding rod 17 to slide upwards and be attached to the back of a patient, the elastic membrane 24 swells upwards, so that the circuit is switched by the single-pole double-throw switch 26, the electromagnetic valve is opened to introduce carbon dioxide, the compressor 18 is cut off to work at the same time, and the fixing effect of the sliding rod 17 is increased; the spraying platform 3 is driven by the driving wheel 27 to move horizontally and spray the separant, so that the separant is sprayed to the bottom end of the slide bar 17 when a patient does not lie down, the adhesion between the slide bar 17 and the hot melt adhesive is reduced, the sliding resetting efficiency of the slide bar 17 is further increased, and the supporting and attaching effect of the top of the slide bar 17 and the patient is increased; the brush bristles 34 are used for brushing the periphery of the bottom end of the sliding rod 17, the coating integrity of the isolating agent on the sliding rod 17 is further increased, meanwhile, the excessive overflowing isolating agent on the sliding rod 17 and the brush plate 33 is recycled by the backflow groove 32, the waste is reduced, and the influence of the isolating agent mixed in hot melt adhesive on the solidification bonding supporting effect is reduced; the arc-shaped plate 36 bypasses the sliding rod 17 when scratching the arc-shaped part 39, and then the brush bristles 34 brush the sliding rod 17, so that the brush bristles 34 scratch the sliding rod 17 and then hit the side surface of the arc-shaped plate 36, the rebound and throwing-off of the brush bristles 34 is reduced, and the waste of the isolating agent and the mixing of the isolating agent into the hot melt adhesive are further reduced.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a patient position fixing device for tumour radiotherapy which characterized in that: comprises a base (1), a lifting unit (11) and a bed body (12) which are arranged from bottom to top in sequence; an arc-shaped non-woven fabric (13) is fixedly connected in a groove formed in the top of the bed body (12); a partition plate (14) is fixedly connected with the corresponding position of the non-woven fabric (13) in the bed body (12), a molten pool (15) is arranged in the bed body (12) at the bottom of the partition plate (14), a heating wire (16) is arranged at the bottom of the molten pool (15), and the molten pool (15) is filled with hot melt adhesive; a group of sliding rods (17) are uniformly distributed on the partition plate (14), the sliding rods (17) penetrate through the partition plate (14) and are in sliding connection with the partition plate (14), one end of each sliding rod (17) props against the non-woven fabric (13), and the other end of each sliding rod (17) extends into the molten pool (15); the sliding rod (17) is controlled to slide up and down through a driving unit;

the driving unit comprises a compressor (18) arranged in the lifting unit (11), and the compressor (18) is communicated with the position, close to the top, of the molten pool (15) through a hose (19); a sliding pipe (2) is fixedly connected to the position, corresponding to the sliding rod (17), of the partition plate (14), and the sliding rod (17) penetrates through the sliding pipe (2); the diameter of the slide rod (17) is smaller than the inner diameter of the slide pipe (2), a piston (21) is connected in the slide pipe (2) in a sliding and sealing mode, and the piston (21) is fixedly connected with the slide rod (17);

a group of coiled pipes (22) are uniformly distributed in the molten pool (15), the upper end and the lower end of each coiled pipe (22) are respectively connected with an air inlet pipe and an exhaust pipe, and the air inlet pipes are communicated with a compressed carbon dioxide gas tank through electromagnetic valves;

a vent hole (23) is formed in the partition plate (14), an elastic membrane (24) is hermetically connected to one side, close to the molten pool (15), of the vent hole (23), and a connecting rod (25) is hinged to the middle of one side, close to the molten pool, of the elastic membrane (24); a single-pole double-throw switch (26) is fixedly connected to the position, corresponding to the vent hole (23), in the partition plate (14), a handle of the single-pole double-throw switch (26) is hinged to the end part of the connecting rod (25), and the single-pole double-throw switch (26) is connected with the electromagnetic valve and the compressor (18) through a lead; after the air pressure in the molten pool (15) rises, the single-pole double-throw switch (26) switches on the electromagnetic valve and simultaneously switches off the power supply of the compressor (18).

2. The patient posture fixing device for tumor radiotherapy as claimed in claim 1, wherein: the two sides of the molten pool (15) close to the upper part are rotatably connected with a driving wheel (27) and a driven wheel (28) through a bracket, the driving wheel (27) is driven to rotate through a personal service motor, and an annular rope (29) is sleeved between the driving wheel (27) and the driven wheel (28); the middle part of the rope (29) is fixedly connected with a spraying platform (3), the top of the spraying platform (3) is provided with a spray head (31), and the spraying platform (3) sprays an isolating agent through the spray head (31).

3. The patient posture fixing device for tumor radiotherapy as claimed in claim 2, wherein: an annular backflow groove (32) is formed in the spraying platform (3) which is correspondingly arranged on the periphery of the spray head (31); one side of the spraying platform (3) is fixedly connected with a group of brush hairs (34) through a brush plate (33), and the brush hairs (34) do not influence the normal spraying of the spray head (31).

4. The patient posture fixing device for tumor radiotherapy as claimed in claim 3, wherein: one side of the top of the spraying platform (3), which is far away from the brush plate (33), is hinged with an arc-shaped plate (36) through a first rotating pin (35), and the arc-shaped plate (36) and the brush plate (33) are centrosymmetric about the spray head (31); one side of the top of the arc-shaped plate (36), which is far away from the first rotating pin (35), is fixedly connected with a second rotating pin (37); a sliding groove (38) is formed in the bottom of the partition plate (14) and corresponds to the rope (29), and an arc-shaped part (39) is formed in the sliding groove (38) and corresponds to the sliding pipe (2); the second rotating pin (37) is embedded into the sliding groove (38) and is connected with the sliding groove (38) in a sliding mode.

5. The patient posture fixing device for tumor radiotherapy as claimed in claim 1, wherein: the electric push rod (4) is fixedly connected to the partition plate (14) on one side of the sliding rod (17), the ejector rod (41) is fixedly connected to the output end of the electric push rod (4), and the wedge block (42) is fixedly connected to the position, close to the sliding rod (17), of the ejector rod (41).

6. The patient posture fixing device for tumor radiotherapy as claimed in claim 5, wherein: the ejector rod (41) is an elastic rod, an arc-shaped groove (43) is formed in one side, close to the sliding rod (17), of the wedge-shaped block (42), and the diameter of the arc-shaped groove (43) is larger than that of the sliding rod (17).

7. The patient posture fixing device for tumor radiotherapy as claimed in claim 6, wherein: one side of the wedge-shaped block (42) close to the sliding rod (17) is fixedly connected with a rubber layer (44), and the rubber layer (44) wraps the side face of the wedge-shaped block (42) close to the sliding rod (17) completely; the top of the sliding rod (17) is fixedly connected with a group of elastic bulges.