CN113018700A

CN113018700A - Radiotherapy positioning device for oncology department

Info

Publication number: CN113018700A
Application number: CN202110223906.XA
Authority: CN
Inventors: 常金
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-06-25

Abstract

The invention discloses radiotherapy positioning equipment for oncology department, wherein a positioning bed board comprises a head bed board, a shoulder bed board and a main bed board which are separated from each other and arranged in a horizontal straight line, and are all slidably mounted on a bearing board, a mounting frame is horizontally and slidably arranged in a first transmission cavity, the mounting frame can slide in the horizontal direction and the vertical direction under the limiting and guiding action of the first transmission cavity, a plurality of elastic telescopic rods are horizontally arranged in grooves of the mounting frame on the left side of a first sliding block, the elastic telescopic rods always apply horizontal rightward thrust to the first sliding block, a rotatable screw rod shaft is horizontally mounted at the upper part in a second transmission cavity, and a driving shaft is simultaneously inserted into a rotation limiting strip hole through guide rods of the three transmission cavities, so that when a cylindrical gear rotates, the guide rods push the first sliding block to move horizontally. The invention can flexibly adjust the body position of the patient, is simple and reliable and is easy to maintain and manufacture.

Description

Radiotherapy positioning device for oncology department

Technical Field

The invention relates to the technical field of tumor radiotherapy, in particular to radiotherapy positioning equipment for oncology.

Background

Tumor radiotherapy is a local treatment method for treating tumors by using radioactive rays; about seventy percent of cancer patients require radiation therapy during the treatment of cancer and the patients need to be positionally fixed during the radiation therapy, so that it is necessary to develop a device for fixing the tumor position of the patients for adjuvant therapy.

The positioning device on the market can not be adapted to patients with different body types, the overall flexibility of the positioning bed plate is poor, the local position of the patient with the small body type can not be fixed, and the tumor treatment can not be ensured to be carried out smoothly. In addition, although some devices with high automation degree have perfect functions, the structure is extremely complex, the construction cost is high, and the maintenance is more difficult, professional after-sales personnel are needed to maintain in person after the fault occurs many times, medical personnel cannot carry out the maintenance to a certain degree by themselves, inconvenience is brought to the use, and delay is caused to patients. To this end, we propose a radiotherapy positioning device for oncology.

Disclosure of Invention

The invention aims to provide radiotherapy positioning equipment for oncology, which aims to solve the problems that most of the existing related positioning devices proposed in the background art cannot be suitable for patients with different body types, the positioning bed plate has poor overall flexibility, local position fixation cannot be provided for patients with small body types, tumor treatment cannot be carried out smoothly, and the lying posture comfort of the patients cannot be improved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a radiotherapy positioning device for oncology, includes the location bed board, the location bed board is including separating each other, is head bed board, shoulder bed board and main bed board of a horizontal alignment and equal slidable mounting on the loading board, and the bottom of head bed board, shoulder bed board and main bed board has first slider, second slider, third slider in proper order, first slider, second slider, third slider stretch into first transmission chamber, second transmission chamber and third transmission chamber with corresponding ground in proper order, wherein

The mounting frame is arranged in the first transmission cavity in a horizontally sliding manner, the mounting frame can slide in the horizontal direction and the vertical direction under the limiting and guiding effects of the first transmission cavity, the mounting frame is of an inverted n-shaped structure, the opening of a groove of the mounting frame is upward, the first sliding block can be vertically inserted into the groove of the mounting frame and can slide in the horizontal direction, a plurality of elastic telescopic rods are horizontally arranged in the groove of the mounting frame on the left side of the first sliding block, the elastic telescopic rods always apply horizontal rightward thrust to the first sliding block, a rectangular vertically-arranged rotation limiting strip hole is formed in the right side of the first sliding block, a vertically-arranged rectangular strip-shaped notch is formed in the side wall of the mounting frame opposite to the rotation limiting strip hole, and a rack is fixedly connected to the side wall of one side of the strip-shaped notch along the vertical direction;

a rotatable screw shaft is horizontally arranged at the upper part in the second transmission cavity, the screw shaft penetrates through the second slider in a threaded fit mode, so that the second slider does linear motion at the upper part in the second transmission cavity when the screw shaft rotates, and a driven bevel gear is fixedly connected to the right end of the screw shaft;

also comprises a driving shaft which is horizontally arranged, can rotate around the axis of the driving shaft and does not axially move, the driving shaft simultaneously passes through the three transmission cavities, and,

the first shaft section of the driving shaft in the first transmission cavity comprises a cylindrical gear, a sub-screw rod and a guide rod with a rectangular cross section, the cylindrical gear is meshed with the rack, one end of the sub-screw rod is inserted into the left end face of the cylindrical gear in a threaded fit mode, the other end of the sub-screw rod is fixedly connected with the guide rod, and the guide rod is inserted into the rotation limiting strip hole, so that when the cylindrical gear rotates, the guide rod pushes the first sliding block to move horizontally;

the second shaft section of the driving shaft in the second transmission cavity comprises a first sub-shaft and a second sub-shaft which are separated from each other, the first sub-shaft is arranged close to the first shaft section, an annular gear ring is arranged on the side wall of one end, close to the first sub-shaft and the second sub-shaft, of the first sub-shaft, and a plurality of tooth sockets are formed in the end face, facing the first shaft section, of the gear ring; the side wall of the second sub-shaft close to the first sub-shaft is provided with a strip-shaped sliding groove parallel to the axis of the second sub-shaft;

the first sub-shaft and the second sub-shaft are sleeved by a sliding conversion mechanism, the sliding conversion mechanism comprises a driving bevel gear, a transmission claw sleeve and a toggle sleeve, the driving bevel gear is integrally connected and positioned in the middle, the transmission claw sleeve is positioned at the left end, the toggle sleeve is positioned at the right end, the transmission claw sleeve is provided with a plurality of transmission claws with longitudinal cuts in a random shape, the transmission claws are in socket joint meshing with the tooth grooves, so that all the transmission claws are correspondingly inserted into the tooth grooves one by one when the transmission claw sleeve moves horizontally to the right to realize the transmission connection of the transmission claw sleeve and the first sub-shaft, the inner surface of the toggle sleeve is provided with a sliding strip which is inserted into the strip-shaped sliding groove in a sliding fit manner, the outer surface of the toggle sleeve is provided with a circle of insertion grooves, the right end of the toggle sleeve is connected with the side wall of the second transmission cavity through a return spring sleeved on the second sub-shaft, the return spring always has a right pulling force on the toggle sleeve and pulls the transmission claws to The position of (a);

a third shaft section of the driving shaft in the third transmission cavity is a stud section, and the stud section is in threaded fit with the third sliding block in a penetrating manner;

when the driving shaft rotates due to the screwing direction among the sub screw rod, the screw rod shaft and the stud section, if the first sub shaft and the second sub shaft are in transmission connection through the slide conversion mechanism, the moving direction between the first sliding block and the third sliding block is opposite, and if the second sub shaft is in transmission connection with the driven bevel gear through the slide conversion mechanism, the moving direction between the second sliding block and the third sliding block is opposite.

Compared with the prior art, the invention has the beneficial effects that: the invention realizes the transmission of the whole device through the driving rod, can lead the structure to be compact, adopts the adjustment of the mutual distance between three bed boards and the synchronous adjustment of the head bed board, can adapt to the body shapes of most patients, provides enough lying posture comfort level and reduces the mental pressure and the physical fatigue of the patients. Structurally, the mechanical transmission mainly adopted is simple and clear, common workers can disassemble and maintain, when the machine breaks down and needs emergency use, the machine can automatically overhaul and check to a certain extent, or can better provide fault information guide before overhaul for professional after-sales personnel, and the manufacturing cost is relatively low. Therefore, the invention well avoids the problem that the body of a patient needs to be continuously moved to adjust the posture during the tumor treatment, reduces the physical consumption of medical care personnel, particularly the patient, relieves the mood and ensures the smooth progress of the tumor treatment.

Drawings

FIG. 1 is a cross-sectional view of the overall construction of the present invention;

FIG. 2 is an end view of a first shaft segment of the drive shaft;

FIG. 3 is an enlarged view of a portion of the slide switch mechanism of the present invention;

FIG. 4 is a cutaway view of a gullet in a section perpendicular to the first sub-axis;

FIG. 5 is an enlarged partial schematic view of the adjustment mechanism;

FIG. 6 is a perspective view of another embodiment of the present invention;

FIG. 7 is a schematic view of an exploded structure of the annular arc plate of the present invention;

fig. 8 is a schematic view of the upper structure of the positioning bed board in the invention;

FIG. 9 is a schematic view of the torso main panel of the present invention;

FIG. 10 is a schematic view showing the overall structure of the movable block of the present invention;

FIG. 11 is a schematic view of a first adjusting plate according to the present invention;

FIG. 12 is a detailed schematic diagram of another embodiment of the present invention.

In the figure: the adjustable chair comprises a positioning bed board 1, a head bed board 101, a shoulder bed board 102, a main bed board 103, a supporting leg column 2, a universal wheel 3, a supporting column 4, an annular arc board 5, a trunk main board 6, a movable body 7, a headrest block 8, a neck pillow block 9, a fixed arc board 10, a first adjusting plate 11, a trunk positioning board 12, a first rod tooth cavity 13, a fixed wall tooth 14, a second rod tooth cavity 15, an engaging tooth 16, a foot placing table 17, a movable extension rod 18, a bearing board b1, a first sliding block b2, a second sliding block b3, a third sliding block b4, a mounting rack b5, an elastic telescopic rod b6, a guide rod b7, a sub screw rod b8, a cylindrical gear b9, a first sub shaft b10, a second sub shaft b11, a third shaft b12, a return spring b13, a screw rod b14, a driven bevel gear b15, a rack b16, a claw b17, a transmission shaft b18, a transmission sleeve 63b 18, a toggle sleeve 68628 b, a driving screw 862, a sliding adjusting rod 23 and a sliding screw 8269553 b.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the positioning table board 1 of the positioning table board 1 for radiation therapy in oncology department of this embodiment mainly includes a positioning table board 1 made of three board bodies, specifically, the positioning table board 1 includes a head table board 101, a shoulder table board 102 and a main table board 103 which are separated from each other, arranged in a horizontal line and all slidably mounted on a bearing board b1, the bottoms of the head table board 101, the shoulder table board 102 and the main table board 103 are sequentially provided with a first slider b2, a second slider b3 and a third slider b4, and the first slider b2, the second slider b3 and the third slider b4 sequentially and correspondingly extend into a first transmission cavity, a second transmission cavity and a third transmission cavity.

As a specific implementation structure, as shown in fig. 1, a mounting bracket b5 is horizontally and slidably disposed in the first transmission cavity, the mounting bracket b5 can slide in the horizontal direction and the vertical direction under the limiting and guiding action of the first transmission cavity, the mounting bracket b5 is in an inverted "pi" type structure, the opening of the groove is upward, the first slider b2 can be vertically inserted into the groove of the mounting bracket b5 and can slide in the horizontal direction, and a plurality of elastic telescopic rods b6 are horizontally disposed in the groove of the mounting bracket b5 on the left side of the first slider b 2. The elastic telescopic rod b6 always applies a horizontal rightward thrust to the first sliding block b2, the right side of the first sliding block b2 is provided with a rectangular rotation limiting strip hole which is vertically arranged, the side wall of the mounting frame b5 opposite to the rotation limiting strip hole is provided with a rectangular strip notch which is vertically arranged, and the side wall of one side of the strip notch is fixedly connected with a rack b16 along the vertical direction.

With continuing reference to fig. 1 and with reference to fig. 3, a rotatable screw shaft b14 is horizontally installed at the upper portion of the second transmission cavity of the present invention, the screw shaft b14 penetrates the second slider b3 in a threaded fit manner, so that the second slider b3 makes a linear motion at the upper portion of the second transmission cavity when the screw shaft b14 rotates, and a driven bevel gear b15 is fixedly connected to the right end of the screw shaft b 14.

Meanwhile, in the embodiment of the invention, the driving shaft which is horizontally arranged and can rotate around the axis of the driving shaft and does not axially move is further included, the driving shaft simultaneously passes through the three transmission cavities, and for the driving shaft, the specific structural characteristics of each shaft section are as follows:

as shown in fig. 1 and 2, the first shaft section of the driving shaft in the first transmission cavity comprises a cylindrical gear b9, a sub-screw rod b8 and a guide rod b7 with a rectangular cross section, the cylindrical gear b9 is engaged with the rack b16, one end of the sub-screw rod b8 is inserted into the left end face of the cylindrical gear b9 in a threaded fit manner, the other end of the sub-screw rod b 3684 is fixedly connected with the guide rod b7, and the guide rod b7 is inserted into the rotation limiting strip hole, so that when the cylindrical gear b9 rotates, the guide rod b7 pushes the first slider b2 to move horizontally.

As shown in fig. 1, the second shaft section of the driving shaft in the second transmission cavity includes a first sub-shaft b10 and a second sub-shaft b11 which are separated from each other, the first sub-shaft b10 is disposed near the first shaft section, and an annular gear ring b20 is disposed on a side wall at one end of the first sub-shaft b10, which is close to the second sub-shaft b11, and a plurality of tooth grooves are opened on an end face of the gear ring b20 facing the first shaft section. And, the side wall of the second sub-shaft b11 near the first sub-shaft b10 is provided with a strip-shaped sliding groove parallel to the axis.

Meanwhile, as shown in fig. 3, the first sub-shaft b10 and the second sub-shaft b11 are sleeved by a sliding conversion mechanism, the sliding conversion mechanism comprises a driving bevel gear b18 integrally connected and positioned in the middle, a driving claw b17 sleeve positioned at the left end and a shifting sleeve b19 positioned at the right end, wherein the driving claw b17 sleeve is provided with a plurality of driving claws b17 with longitudinal sections in a range of x, the driving claw b17 is in socket fit engagement with the toothed grooves, so that when the driving claw b17 sleeve moves horizontally to the right, all the driving claws b17 are inserted into the toothed grooves in a one-to-one correspondence manner to realize the driving connection of the driving claw b17 sleeve and the first sub-shaft b10, while the inner surface of the shifting sleeve b19 is provided with a sliding strip inserted into the strip-shaped sliding groove in a sliding fit manner, the outer surface of the sliding strip is provided with a circle of insertion grooves, the right end of the shifting sleeve b 38 is connected with the side wall of the second driving cavity by a return spring b13 sleeved on the second sub-shaft b11, and the return spring b13 is always pulled to the right side of the shifting sleeve b2 to b17 is in full engagement with the tooth slots and the drive bevel gear b18 is fully disengaged from the driven bevel gear b 15;

with continued reference to fig. 1, the third shaft section b12 of the drive shaft in the third transmission cavity is a screw column section, and the screw column section is connected with the third slide block b4 in a penetrating manner in a threaded fit manner, so as to realize the transmission structure of the screw rod mechanism.

Based on the above structure, as a specific adjusting mechanism, when the driving shaft is rotated by the screw thread turning directions among the sub screw b8, the screw shaft b14 and the stud segment of the present embodiment, if the slide conversion mechanism drivingly connects the first sub shaft b10 and the second sub shaft b11, the moving direction between the first slider b2 and the third slider b4 is opposite, and if the slide conversion mechanism drivingly connects the second sub shaft b11 and the driven bevel gear b15, the moving direction between the second slider b3 and the third slider b4 is opposite. Of course, if other adjustment mechanisms are required, for example, the relative motion relationship between the sliders is not the above requirement, the thread directions of the sub-screw b8, the screw shaft b14 and the stud segment may be adaptively changed.

Based on the above structure, the present embodiment further provides a specific posture adjusting method for patient chemotherapy, in practical application, the initial state of the posture adjusting method can be adjusted to be that the head bed board 101, the shoulder bed board 102 and the main bed board 103 are close to each other, wherein the head bed board is used for placing the head of the patient, the shoulder bed board mainly places the part near the shoulder of the patient, and the main bed board supports the hip, the waist and the like of the patient.

Firstly, the distance between the head bed board and the main bed board can be adjusted according to the overall height of a patient, and at the initial moment, under the action of the tension of the return spring b13, the transmission claw b17 and the gear ring b20 are kept in a meshed state, so that the first sub-shaft b10 and the second sub-shaft b11 form a connected transmission shaft whole.

Secondly, when the driving shaft starts to rotate, the main bed plate moves towards the right side, the head bed plate is pushed towards the left end due to the matching effect of the sub-screw rod b8 and the guide rod b7, namely, when the driving shaft rotates, the guide rod b7 is limited by the rotation limiting strip hole and cannot rotate together, so that the sub-screw rod b8 cannot rotate, and then the sub-screw rod b8 is screwed out relative to the cylindrical gear b9 to push the first slide block b2, so that the distance between the head bed plate and the main bed plate is pulled open, and the head bed plate is adaptive to the height of a patient. Meanwhile, the rotation of the cylindrical gear b9 also drives the rack b16 to move upwards/downwards, so that the mounting rack b5 integrally moves upwards/downwards, the head bed plate moves upwards/downwards, the head of the patient is lifted/put down for a certain height while the distance between the head bed plate and the main bed plate is adjusted to adapt to the height of the patient, and the head of the patient can find the most comfortable supporting height position. Of course, if necessary, the head board can be used as a support for the upper body of the patient, and the main board is mainly used as a support for the buttocks and the lower part, so that the inclination adjustment of the backrest is realized similarly.

And finally, the slide conversion mechanism is moved towards the left end, so that the transmission claw b17 is disconnected from the gear ring b20, the driving bevel gear b18 is meshed with the driven bevel gear b15 in place, and when the driving shaft is continuously rotated, the shoulder bed plate and the main bed plate are separated from each other to a certain distance so as to adapt to the length of the trunk of the patient, and the lying posture is more comfortable and reasonable.

Therefore, the radiotherapy positioning equipment for the oncology department can well enable a patient to have a comfortable and reasonable lying posture, so that the patient is more comfortable when receiving treatment, a doctor is more convenient, the position of the patient does not need to be adjusted manually, the physical strength of the patient is saved, time and labor are saved, and the whole treatment process can be completed by one person without the assistance of medical staff or family members. The main transmission structure of the invention adopts mechanical transmission, one driving shaft is processed into different shaft sections, the structure is simple and compact, the principle is easy to understand, the self-maintenance of medical personnel is very convenient, the condition that no equipment is failed but can be used for treatment when the treatment is needed urgently is avoided, and the treatment time of a patient can not be seriously delayed.

As a series of implementation details of this embodiment, the width of rack b16 is preferably more than half the horizontal length of mount b5 to better drive and support mount b 5. Preferably, the axial length of the cylindrical gear b9 is satisfied: the guide rod b7 pushes the first slider b2 to the left to the limit position and still keeps engaged with the rack b 16. For the above-mentioned elastic telescopic rod b6, there are many embodiments, such as shown in fig. 1, including a seat tube and an insertion rod, the insertion rod is inserted into the seat tube in a sliding fit manner, and is elastically connected with the tube bottom of the seat tube through a cylindrical spring. Further, the top end of the plunger which smoothly contacts with the side of the first slider b2 is formed in a hemispherical shape so that the first slider b2 can slide up and down.

At least three elastic telescopic rods b6 are arranged at equal intervals in the vertical direction to stably apply thrust, so that when the sub-screw rod b8 is screwed into the cylindrical gear b9, the head bed plate automatically returns. For improving the effect, the side surface of the first sliding block b2 is provided with a groove opened in the vertical direction, and preferably, the cross section of the groove is in a semicircular shape matched with the spherical end surface of the inserted bar.

In order to obtain better support for the mounting bracket b5, in the design, auxiliary mechanisms are cooperatively used when the cylindrical gear b9 is meshed with the rack b16, and as shown in fig. 1, a plurality of supporting springs are further arranged at the bottom of the mounting bracket b5 and vertically support and fix the supporting springs at the bottom of the first transmission cavity. Preferably, the stiffness coefficient of each support spring is gradually reduced in the left-to-right direction at the bottom of the mounting bracket b 5. Therefore, a part of the support for the mounting rack b5 can be transferred to the support spring, and the shock absorption can be realized, so that the impact of the head of the patient in the implantation process can be reduced, and the head of the patient can be protected.

Preferably, the right side of the mounting bracket b5 is fixedly connected with at least one limiting column, the limiting column is inserted into a guide groove formed in the left side wall of the first transmission cavity in a sliding fit manner, and the guide groove is vertically arranged. The design is mainly used for better limiting the sliding limit of the mounting rack b5 to still better slide up and down

In particular, in the present embodiment, the tooth grooves of the ring gear b20 are triangular notches, and the driving pawl b17 is a triangular structure adapted to the tooth grooves. Preferably, as shown in fig. 4, the tooth grooves on the gear ring b20 are in an isosceles triangle notch-shaped structure, and the transmission claw b17 is in an isosceles triangle shape matched with the tooth grooves. Preferably, the tooth grooves are of a notch-shaped structure which is an isosceles triangle with an apex angle of 120 degrees, and the driving claws b17 are of an isosceles triangle structure which is matched with the driving claws b17 and has an apex angle of 120 degrees.

The structure of the ring gear b20 can also be manufactured as follows: the tooth grooves on the gear ring b20 are in rectangular notch-shaped structures, and the transmission claw b17 is in a rectangular block structure matched with the transmission claw b 17. To improve the structural strength of the occlusion. And the right end face of the gear ring b20 is a positioning end face, when the sliding conversion mechanism is slid to the inner side face to be attached to the positioning end face, the driving bevel gear b18 and the driven bevel gear b15 realize standard meshing so as to realize positioning limitation on the meshing position of the bevel gears.

In a specific implementation, the cross sections of the teeth of the driving bevel gear b18 and the driven bevel gear b15 are isosceles triangles, and the cross sections of the teeth in the direction from the small end face to the large end face of the bevel gear are gradually increased. The design is mainly because the gear tooth structure similar to the triangular prism with the drawing taper can be adaptively and rapidly meshed together when two bevel gears axially move to be in contact, has a remarkable effect, and is a very effective preferred design structure.

In addition, in the present embodiment, for the axial sliding operation of the slide conversion mechanism, many structures in the prior art can be used, and the present embodiment considers the simplification of the structure, the reduction of the volume, and the automatic conversion of the transmission control, and is designed as follows: electromagnetic elements are embedded in the wall of the second transmission cavity near the left end and the right end of the slide conversion mechanism, and only one of the two electromagnetic elements is electrified so as to attract and fix the slide conversion mechanism to a position meshed with the driven bevel gear b15 or a position meshed with the gear ring b20 for transmission respectively. The whole sliding conversion movement is moved to a corresponding position through electromagnetic attraction force, and connection and maintenance of a corresponding transmission chain are achieved.

For the moving structure of the slide conversion mechanism, besides the automatic control type structure, the invention also provides a pure mechanical operation to replace or cooperate with the electromagnetic automatic control type operation mechanism, so that the performance is more stable and reliable. Specifically, as shown in fig. 1 and 5, the present embodiment further includes an adjusting component for toggling the slide conversion mechanism, and the adjusting component includes an L-shaped adjusting rod b21, a sliding block b22 and a fixing screw b23, wherein a vertical section of the adjusting rod b21 can horizontally move in the bearing plate b1, and a top end of the vertical section can be in plugging fit with the plugging groove to toggle the entire slide conversion mechanism to axially move. The horizontal section of the adjusting rod b21 is attached to the notch of the horizontal strip groove formed in the bottom surface of the bearing plate b1, the fixing screw b23 penetrates through the horizontal section and then extends into the horizontal strip groove, and a T-shaped sliding groove structure is formed in the groove bottom of the horizontal strip groove. One end of the sliding block b22 is in a T-shaped structure in sliding fit with the T-shaped sliding groove, so that the sliding block b22 can slide horizontally in the horizontal bar groove without departing from the T-shaped sliding groove, and one end of the sliding block b22, which is away from the T-shaped sliding groove, is provided with a threaded hole for screwing the fixing screw b23, so that when the fixing screw b23 is screwed, the position of the adjusting rod b21 is fixed.

When the sliding conversion mechanism is used, after the fixing screw b23 is unscrewed, the adjusting rod b21 is pulled out downwards for a certain distance, the adjusting rod b21 is in a horizontal sliding state, and therefore the shifting sleeve b19 is released, and the sliding conversion mechanism returns to the position of connecting and driving the two sub-shafts under the action of the return spring b 13. When the transmission connection of the two bevel gears needs to be realized, the adjusting rod b21 is moved rightwards to be right below the insertion groove, then the adjusting rod b21 is inserted into the insertion groove upwards and moved leftwards, the sliding conversion mechanism is driven to realize the meshing transmission of the two bevel gears, the meshing transmission of the transmission claw b17 and the gear ring b20 is disconnected, the fixing screw b23 at the moment is simultaneously screwed, and the adjusting rod b21 is fixed in position. The pure mechanical operation has simple and reliable structure, and has less influence of environmental factors and stronger controllability compared with the control of electromagnetic attraction.

Preferably, as shown in fig. 1, a push-pull plate b24 perpendicular to the free end of the horizontal section of the adjusting rod b21 is further fixed to push and pull the sliding adjusting rod b 21. Meanwhile, a horizontal plate can be fixedly connected to the vertical section and is supported and connected through a circular spring, so that the whole adjusting rod b21 has elastic sliding performance in the vertical direction. When the fixing screw b23 is loosened, the adjusting rod b21 can automatically pop out of the inserting groove of the toggle sleeve b19 to automatically release the toggle sleeve b19, and the slide switching mechanism can automatically reset, so that the transmission connection between the first sub-shaft b10 and the second sub-shaft b11 is automatically realized.

Referring to fig. 6-11, in the present embodiment, four corners of the lower end surface of the positioning bed board 1 are provided with the support leg posts 2, the outer surfaces of the support leg posts 2 are provided with the universal wheels 3 near the lower end, the middle position of the upper end surface of the positioning bed board 1 is provided with the support column 4 near the left side, the universal wheels 3 are connected with the positioning bed board 1 through the support leg posts 2, and the support column 4 is fixed with the positioning bed board 1. Support column 4's surface is close to upper portion and is provided with loop type arc board 5, the upper end surface intermediate position of location bed board 1 is close to the right side and is provided with truck mainboard 6, truck mainboard 6's bilateral symmetry installs activity body block 7, the inside wall of loop type arc board 5 is close to the left side and is provided with headrest piece 8, loop type arc board 5 passes through

support column

4 and 1 fixed mounting of location bed board, activity body block 7 passes through

truck mainboard

6 and 1 symmetrical setting of location bed board, headrest piece 8's whole shape is the semicircle body, its upper intermediate position is seted up flutedly, loop type arc board 5's whole shape is the circular arc board type, and it corresponds the setting through location bed board 1 and truck mainboard 6. The movable body blocks 7 on two sides are lifted and stretched towards two sides in advance, under the condition that a first adjusting plate 11 and an engaging tooth 16 on the upper portion of the first adjusting plate are tightly meshed with a fixed wall tooth 14 on the inner wall of a first rod tooth cavity 13, the longitudinal width between the two groups of movable body blocks 7 is effectively changed, then, a foot placing table 17 is pulled out from a positioning bed board 1 under the telescopic matching of a movable stretching rod 18, a patient can lie on a trunk main board 6, the head is embedded into a ring-shaped arc board 5 through a headrest block 8, and the neck pillow block 9 provides comfortable support for the neck part, and meanwhile, feet are placed in parallel with the head through the foot placing table 17.

The inside wall of loop type arc plate 5 is close to the right side and is provided with neck pillow piece 9, the surface of activity body 7 has set firmly fixed arc plate 10 near front side upper portion, one side symmetry that the surface of activity body 7 is close to the truck mainboard has set firmly first regulating plate 11, truck mainboard 6's both ends surface is close to upside border position and has set firmly truck locating plate 12, neck pillow piece 9 sets up side by side with head pillow piece 8 through loop type arc plate 5, and the vertical height of the top surface minimum of neck pillow piece 9 is greater than the vertical height of 8 top surfaces minimum of head pillow piece. The surface of activity body 7 is close to upper portion and is the arc wall setting, and fixed arc 10 constitutes the spacing cavity structure of activity with the arc wall jointly, the front end surface of truck mainboard 6 is close to the right side intermediate position and has seted up a pole tooth chamber 13, the inside wall surface of a pole tooth chamber 13 is close to upper portion and has evenly set firmly fixed wall tooth 14 of a plurality of groups, the front end surface of truck mainboard 6 is close to the left side intermediate position and has seted up No. two pole tooth chambers 15, the upper end surface of first regulating plate 11 has evenly set firmly interlock tooth 16 of a plurality of groups, first regulating plate 11 is through a pole tooth chamber 13, fixed wall tooth 14 and the cooperation of interlock tooth 16 set up with truck mainboard 6 meshing. The second rod tooth cavity 15 and the first rod tooth cavity 13 are symmetrically arranged about the trunk main board 6, and are connected and mounted with the positioning bed board 1 through the support legs 2, so that the overall flexibility of the positioning bed board 1 can be increased, and convenience is provided for convenient transfer of a positioning device, wherein two sets of trunk positioning boards 12 are fixedly arranged at two sides of the trunk main board 6, and the trunk positioning boards 12 are used for providing local position fixation for a patient with a small size, so that the patient is prevented from shaking during tumor treatment, and smooth tumor treatment is ensured;

the right end of the positioning bed board 1 is provided with a foot placing table 17, the surface of the left end of the foot placing table 17 is symmetrically provided with movable extension rods 18, the surface of the inner side wall of the second rod tooth cavity 15 is uniformly and fixedly provided with a plurality of groups of fixed small wall teeth, the first adjusting plate 11 is symmetrically arranged relative to the movable body block 7, and the foot placing table 17 is movably installed with the positioning bed board 1 through the movable extension rods 18. Torso locating plate 12 sets up about torso mainboard 6 symmetry, activity body 7 is through first regulating plate 11 and the cooperation of torso mainboard 6 and location bed board 1 parallel arrangement, and activity body 7 is through first regulating plate 11 and interlock tooth 16, a pole tooth chamber 13 and fixed walling tooth 14 and No. two pole tooth chambers 15 and the cooperation of fixed little walling tooth set up with truck mainboard 6 is flexible, put podium 17 and stretch out by pulling out in the location bed board 1 under the flexible cooperation of pole 18 is stretched in the activity, the patient can lie the health on truck mainboard 6, the head is by on headrest piece 8 embedding loop type arc plate 5, when providing comfortable support for the neck position via neck pillow piece 9, settle the foot through putting podium 17 and head parallel and level. At this moment, the movable body block 7 is pushed by medical staff, under the guide of the first adjusting plate 11, the fixed arc plate 10 and the arc-shaped groove jointly carry out position limitation on the trunk of the body of the patient, and under the position positioning effect of the movable limiting cavity structure on the body of the patient, the stable positioning effect of the positioning device is realized.

The working principle is as follows: for this kind of positioning device, firstly, the positioning device is provided with the movable block 7, when the positioning bed board 1 is used, the movable blocks 7 on both sides are lifted and stretched towards both sides in advance, namely, the movable blocks 7 are slightly lifted upwards and then pulled towards both sides, when the movable blocks 7 are pulled to a proper position, the movable blocks 7 are put down, then, under the tight meshing of the meshing teeth 16 on the upper part of the first adjusting plate 11 and the wall teeth 14 fixed on the inner wall of the first rod tooth cavity 13, the meshing connection is kept, and the longitudinal width between the two groups of movable blocks 7 is effectively changed. Subsequently, the foot placing table 17 is pulled out from the positioning bed board 1 under the telescopic matching of the movable extension rod 18, the patient can lie on the trunk main board 6, the head is placed on the annular arc board 5 through the headrest block 8, the neck pillow block 9 provides comfortable support for the neck part, meanwhile, the feet are placed in parallel and level with the head through the foot placing table 17, and at the moment, the movable body block 7 is lifted up again through medical staff. Then, the movable body 7 is pushed towards the side of the trunk, is guided by the first adjusting plate 11, finally falls down to the set target position, and is occluded, connected and fixed with the wall teeth 14 again, and at the moment, the fixed arc plate 10 and the arc-shaped groove jointly position and limit the trunk of the patient from the side. Under the position location effect of the spacing lumen structure of activity to patient's health that forms, realize this positioner's firm positioning effect, and avoid causing uncomfortable the patient in, through the longitudinal width between the change activity body block 7 for positioner is adaptable to the patient in different sizes and uses, is convenient for carry out spacing fixedly according to the specific type of patient, offers convenience for patient and medical personnel. Wherein the support column 4 is used for firmly connecting the annular arc plate 5 with the positioning bed board 1, the annular arc plate 5 integrally provides a support function for the head of a patient, and the second rod tooth cavity 15 is used as an inserting space for the first adjusting plate 11 of the other group to pass through. Finally the positioning device is provided with universal wheels 3. Because it is connected the installation with location bed board 1 via heel post 2, the whole flexibility of multiplicable location bed board 1 provides convenience for positioner's convenient transfer, wherein utilizes two sets of truck locating plates 12 fixed settings in truck mainboard 6 both sides, provides local position by truck locating plate 12 for the less patient of size and fixes, avoids the patient to rock when tumour therapy, ensures going on smoothly of tumour therapy.

In the specific manufacturing process, as shown in fig. 12, the trunk main plate 6 and the trunk positioning plate 12 are split into two sections, and the two sections are respectively and correspondingly mounted on the shoulder bed plate 102 and the main bed plate 103 of the positioning bed plate 1, so that a complete and complete radiotherapy positioning device can be formed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a radiotherapy positioning device for oncology, includes location bed board, its characterized in that: the positioning bed board comprises a head bed board, a shoulder bed board and a main bed board which are separated from each other, are arranged in a horizontal straight line and are arranged on the bearing board in a sliding mode, a first sliding block, a second sliding block and a third sliding block are sequentially arranged at the bottoms of the head bed board, the shoulder bed board and the main bed board, the first sliding block, the second sliding block and the third sliding block correspondingly extend into a first transmission cavity, a second transmission cavity and a third transmission cavity in sequence, and the first sliding block, the second sliding block and the third sliding block are sequentially arranged in a

2. The oncology radiotherapy positioning apparatus of claim 1, wherein: the width of the rack is more than half of the length of the mounting rack in the horizontal direction.

3. The oncology radiotherapy positioning apparatus of claim 2, wherein: the axial length of the cylindrical gear needs to satisfy the following requirements: the first sliding block is still meshed with the rack when the guide rod pushes the first sliding block to the left to the limit position.

4. The oncology radiotherapy positioning apparatus of claim 1, wherein: the elastic telescopic rod comprises a seat tube and an insertion rod, the insertion rod is inserted in the seat tube in a sliding fit manner and is elastically connected with the tube bottom of the seat tube through a cylindrical spring; the top end of the inserted rod, which is in smooth contact with the side surface of the first sliding block, is hemispherical; at least three elastic telescopic rods are uniformly arranged in the vertical direction at intervals; a groove which is arranged in the vertical direction is formed in the side surface of the first sliding block; the cross section of the groove is in a semicircular shape matched with the spherical end face of the inserted bar.

5. The oncology radiotherapy positioning apparatus of claim 1, wherein: the bottom of the mounting frame is also provided with a plurality of supporting springs which are vertically supported and fixed at the bottom of the first transmission cavity; the stiffness coefficient of each support spring is gradually reduced in the left-to-right direction at the bottom of the mounting bracket.

6. The oncology radiotherapy positioning apparatus of claim 1, wherein: the tooth grooves on the gear ring are of rectangular notch-shaped structures, and the transmission claws are of rectangular block structures matched with the transmission claws; the cross sections of the gear teeth of the driving bevel gear and the driven bevel gear are isosceles triangles, and the cross sections of the gear teeth in the direction from the small end face to the large end face of the bevel gear are gradually increased.