Head positioning device for head tumor radiotherapy

Abstract

The invention discloses a head positioning device for head tumor radiotherapy. The head positioning device comprises a bed body, an inclination mechanism, a head fixing mechanism and a lower jaw fixator, the front end of the bed body is provided with a tilting mechanism; a head fixing mechanism is arranged at the upper end of the tilting mechanism; the front end of the base is provided with a connecting seat, the middle of the base is provided with a rotating seat, and the side face of the rotating seat is provided with a worm seat. A connecting rod is arranged in the connecting seat; one side of the rotating frame in the horizontal direction is connected with a worm gear, and one side of the rotating frame in the vertical direction is provided with a rotating rod; sliding wheels are arranged at the tail ends of the rotating rods; the worm seat is rotationally connected with the worm; a rocker is arranged at one end of the worm and penetrates through the rocker seat; the bottom of the tail end of the inclined plate is provided with a connecting ring rotationally connected with a connecting rod; the bottom of the front end of the inclined plate is provided with a sliding groove slidably connected with sliding wheels. The inclination angle of the inclined plate is adjusted through the inclination mechanism; therefore, the angle of the head can be adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of radiotherapy equipment, and in particular relates to a head positioning device for radiotherapy of skull tumors. Background Art

[0002] Radiotherapy for head tumors uses high-energy rays (such as X-rays, gamma rays, etc.) to irradiate intracranial tumors in order to kill or inhibit the growth of tumor cells. Radiotherapy plays an important role in the treatment of intracranial tumors, especially for cases that cannot be operated on or require adjuvant therapy after surgery. Radiotherapy requires extremely high positioning accuracy, because even a slight deviation may cause radiation to irradiate normal tissues and cause unnecessary damage. By fixing the head, it can be ensured that the patient's head remains in a stable position during treatment, thereby ensuring that the radiation can accurately irradiate the tumor site.

[0003] In the prior art, the existing head positioning devices can only fix the head when in use, but cannot adjust the head when it is necessary to reduce cerebral edema and intracranial pressure. At the same time, when clamping and fixing the head, the clamping devices used are all rigid clamping devices, resulting in low fixation effect and insufficient patient comfort. Therefore, this scheme proposes a head positioning device for radiotherapy of head tumors. Summary of the invention

[0004] In order to solve the above technical problems, the present invention designs a head positioning device for radiotherapy of head tumors. By designing a tilting mechanism, the tilting mechanism is adjusted and the rocker is turned to make the tilting mechanism drive the tilting plate to tilt, thereby raising the head angle. At the same time, a fitting plate is set by sliding the front end of the fixing plate, and a fitting spring is set in the middle of the connection. When the device fits the patient's head for clamping and fixing, the spring can be stretched and adjusted according to the concave and convex position of the patient's face through the expansion and contraction effect of the spring, so that the fitting plate fits the patient's head more closely, thereby improving the stability of fixation and the comfort of the patient. In order to achieve the above technical effects, the present invention is implemented through the following technical solutions: a head positioning device for head tumor radiotherapy, comprising: a bed, a tilting mechanism, a head fixing mechanism, and a mandibular fixator; The front end of the bed is provided with a tilting mechanism; the upper end of the tilting mechanism is provided with a head fixing mechanism; the head fixing mechanism is rotatably connected to the mandibular fixer; The tilting mechanism includes a rocker, a base, a rocker seat, a worm, a worm seat, a worm wheel, a rotating seat, a connecting rod, a connecting ring, a connecting seat, a rotating frame, a rotating rod, a sliding wheel, and a tilting plate; a connecting seat is arranged at the front end of the base, a rotating seat is arranged in the middle, a worm seat is arranged on the side of the rotating seat, and a rocker seat is arranged on the side of the end; a connecting rod is arranged in the connecting seat; a cross groove is provided on the rotating seat for rotationally connecting to the rotating frame, one side of the rotating frame in the horizontal direction is connected to the worm wheel, and a rotating rod is provided on one side in the vertical direction; a sliding wheel is provided at the end of the rotating rod; the worm seat is rotationally connected to the worm; the worm meshes with the worm wheel, and a rocker is provided at one end of the worm to penetrate the rocker seat; a connecting ring is provided at the bottom of the end of the tilting plate for rotationally connecting to the connecting rod; a sliding groove is provided at the bottom of the front end of the tilting plate for sliding connection to the sliding wheel; Furthermore, the depth of the slide groove at the bottom of the inclined plate is consistent with the depth of the cross groove of the rotating seat, and when the inclined plate reaches a horizontal position, the bottom of the slide groove fits the base; Furthermore, a support leg is provided at the bottom of the bed, and a hollow tilting box is provided at the bottom of the front end of the bed; a tilting mechanism is provided in the tilting box, a round hole is provided at the front end of the tilting box for the rocker to pass through, and a rectangular notch of the same size is provided on the bed at the position of the tilting plate slide; Furthermore, the head fixing mechanism includes a connecting rod, a fixing rod, a rack, a knob, a fixing seat, a fitting plate, a gear, a fitting spring, and a gear box; the fixing seats are symmetrically arranged on both sides of the front end of the tilting plate, and a gear box is arranged in the middle; holes are respectively provided on the fixing seats to arrange the fixing rods; a connecting rod is arranged at the rear end of the fixing rod, and a fixing plate is arranged at the front end; a rack is arranged at the other end of the connecting rod; racks are arranged at both ends of the gear meshing in the gear box; a knob is arranged at the front end of the gear and passes through the gear box; the front end of the fixing plate is slidably connected to the fitting plate, and a plurality of fitting springs are arranged in the middle of the connection between the fixing plate and the fitting plate; Furthermore, the connecting rod is L-shaped, the connecting rod is vertically connected to the fixed rod, and the end of the connecting rod is vertically connected to the rack; Furthermore, the rack is parallel to the fixed rod, and the racks on both sides are respectively engaged with the gears one above and one below; Furthermore, the mandibular fixer includes a rotating rod, a support plate, a telescopic rod, a telescopic limit rod, and a telescopic spring; the rotating rod is symmetrically provided with fixed rods that are respectively rotatably connected on both sides, the rotating rod is hollow, and a plurality of limit grooves are provided on both sides; a support plate is provided in the middle of the telescopic rod, and telescopic springs are provided at the front and rear ends of the telescopic rod respectively; a telescopic limit rod is provided at the front end of the telescopic spring and is movably connected to the rotating rod.

[0005] The beneficial effects of the present invention are: The present invention designs a tilting mechanism. When the angle of the patient's head needs to be adjusted, the rocker is rotated to drive the worm to rotate, so that the worm drives the turbine to rotate, and the turbine drives the rotating frame to rotate, so that the sliding wheel slides in the slide groove at the bottom of the tilting plate. Since the front end is a rotation connection, the sliding wheel supports the rear end of the tilting plate, and the toothed tilting plate tilts, so as to adjust the tilting angle of the tilting plate; thereby achieving the angle adjustment of the head; At the same time, the fixed plates at both ends are connected by gear racks, and the rotating knob drives the gear to rotate, so that the rack slides along the gear to adjust the relative position of the two fixed plates, and the slidingly connected fitting plate, when the fitting plate fits the patient's head, the elastic effect of the fitting spring arranged between the fitting plate and the fixed plate enables the fitting plate to bend according to the patient's facial curve, so that the fitting plate can fully fit the patient's face, improve the fixation effect and improve the patient's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0007] Figure 1 It is a schematic diagram of the overall structure of a head positioning device for radiotherapy of head tumors; Figure 2 It is a schematic diagram of the internal structure of a head positioning device for radiotherapy of head tumors; Figure 3 It is a schematic diagram of the tilt mechanism structure of a head positioning device for radiotherapy of head tumors; Figure 4 It is a front cross-sectional view of a head positioning device for radiotherapy of head tumors; Figure 5 It is a side cross-sectional view of a head positioning device for radiotherapy of head tumors; Figure 6 The present invention is a structural diagram of the connection between the rotating rod and the telescopic rod of a head positioning device for radiotherapy of head tumors; In the accompanying drawings, the components represented by the reference numerals are listed as follows: Bed, 101-support leg, 102-tilt box, 2-tilt mechanism, 201-rocker, 202-base, 203-rocker seat, 204-worm, 205-worm seat, 206-worm wheel, 207-rotating seat, 208-connecting rod, 209-connecting ring, 210-connecting seat, 211-rotating frame, 212-rotating rod, 213-sliding wheel, 214-tilt plate, 3-head fixed Fixed mechanism, 301-connecting rod, 302-fixing rod, 303-rack, 304-knob, 305-fixing seat, 306-fitting plate, 307-fixing plate, 308-gear, 309-fitting spring, 310-gear box, 4-mandibular fixer, 401-rotating rod, 402-support plate, 403-telescopic rod, 404-telescopic limiting rod, 405-telescopic spring, 406-limiting groove. DETAILED DESCRIPTION

[0008] The invention discloses a head positioning device for head tumor radiotherapy, comprising: a bed 1, a tilting mechanism 2, a head fixing mechanism 3, and a mandibular fixer 4; the tilting mechanism 2 is arranged at the front end of the bed 1; the head fixing mechanism 3 is arranged at the upper end of the tilting mechanism 2; the head fixing mechanism 3 is rotatably connected to the mandibular fixer 4; the tilting mechanism 2 comprises a rocker 201, a base 202, a rocker seat 203, a worm 204, a worm seat 205, a worm wheel 206, a rotating seat 207, a connecting rod 208, a connecting ring 209, a connecting seat 210, a rotating frame 211, a rotating rod 212, a sliding wheel 213, and a tilting plate 214; the connecting seat 210 is arranged at the front end of the base 202, the rotating seat 207 is arranged in the middle, and the worm seat 205 is arranged on the side of the rotating seat 207, and the end A rocker seat 203 is arranged on the side surface of the end; a connecting rod 208 is arranged in the connecting seat 210; a cross groove is provided on the rotating seat 207 to be rotatably connected to the rotating frame 211, one side of the rotating frame 211 is connected to the worm gear 206 in the horizontal direction, and a rotating rod 212 is arranged on the one side in the vertical direction; a sliding wheel 213 is arranged at the end of the rotating rod 212; the worm seat 205 is rotatably connected to the worm 204; the worm 204 engages with the worm gear 206, and a rocker 201 is arranged at one end of the worm 204 to penetrate the rocker seat 203; a connecting ring 209 is arranged at the bottom of the end of the inclined plate 214 to be rotatably connected to the connecting rod 208; a sliding groove is arranged at the bottom of the front end of the inclined plate 214 to be slidably connected to the sliding wheel 213; the inclination angle of the inclined plate 214 is adjusted by the inclination mechanism 2; thereby achieving the angle adjustment of the head.

[0009] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example

[0010] like Figure 1-3As shown in , 5, a tilting mechanism 2 is arranged at the front end of the bed body 1; a head fixing mechanism 3 is arranged at the upper end of the tilting mechanism 2; the head fixing mechanism 3 is rotatably connected to the mandibular fixer 4; the tilting mechanism 2 includes a rocker 201, a base 202, a rocker seat 203, a worm 204, a worm seat 205, a worm wheel 206, a rotating seat 207, a connecting rod 208, a connecting ring 209, a connecting seat 210, a rotating frame 211, a rotating rod 212, a sliding wheel 213, and a tilting plate 214; a connecting seat 210 is arranged at the front end of the base 202, a rotating seat 207 is arranged in the middle, and a worm seat 205 is arranged on the side of the rotating seat 207, and a rocker seat 203 is arranged on the side of the end; a connecting rod 208 is arranged in the connecting seat 210; the rotating seat 207 is provided with a cross groove for rotatably connecting to the rotating frame 211, and the rotating frame 211 is connected to the worm wheel 206 on one side in the horizontal direction and is arranged on one side in the vertical direction A rotating rod 212; a sliding wheel 213 is arranged at the end of the rotating rod 212; the worm seat 205 is rotatably connected to the worm 204; the worm 204 is meshed with the worm wheel 206, and a rocker 201 is arranged at one end of the worm 204 to penetrate the rocker seat 203; a connecting ring 209 is arranged at the bottom of the end of the inclined plate 214 to rotatably connect the connecting rod 208; a slide groove is arranged at the bottom of the front end of the inclined plate 214 to slide and connect the sliding wheel 213; the depth of the slide groove at the bottom of the inclined plate 214 is consistent with the depth of the cross groove of the rotating seat 207, and the bottom of the slide groove fits the base 202 when the inclined plate 214 reaches the horizontal position; a supporting leg 101 is arranged at the bottom of the bed body 1, and a hollow tilting box 102 is arranged at the bottom of the front end of the bed body 1; a tilting mechanism 2 is arranged in the tilting box 102, a round hole is arranged at the front end of the tilting box 102 for the rocker 201 to pass through, and a rectangular notch of the same size is arranged on the bed body at the position of the slide groove of the inclined plate 214; In this embodiment, the working principle of the tilting mechanism 2 is as follows: by rotating the rocker 201, the rocker 201 drives the worm 204 to rotate along the worm seat 205, thereby driving the turbine meshing therewith to rotate, so that the turbine drives the rotating frame 211 to rotate in the groove of the rotating seat 207, so that the sliding wheel 213 at the end slides in the slide groove at the bottom of the tilting plate 214, and the connecting ring 209 at the bottom of the front end of the tilting plate 214 and the connecting rod 208 are connected by rotation, so that the tilting plate 214 is tilted, thereby achieving the purpose of adjusting the angle of the patient's head; In this embodiment, by rotating the rocker 201, the tilting mechanism 2 can drive the tilting plate 214 to tilt, thereby raising the angle of the patient's head; this angle adjustment helps to adjust the position of the patient's head according to treatment needs during radiotherapy, ensuring that the radiation can accurately irradiate the tumor site; reasonable head angle adjustment helps to improve the patient's comfort during treatment, especially when maintaining the same posture for a long time. Example

[0011] like Figure 1 , 2 4, the head fixing mechanism 3 includes a connecting rod 301, a fixing rod 302, a rack 303, a knob 304, a fixing seat 305, a fitting plate 306, a gear 308, a fitting spring 309, and a gear box 310; the fixing seats 305 are symmetrically arranged on both sides of the front end of the tilting plate 214, and a gear box 310 is arranged in the middle; holes are respectively provided on the fixing seats 305 to arrange the fixing rods 302; the connecting rod 301 is arranged at the rear end of the fixing rod 302, and a fixing plate 307 is arranged at the front end; the rack 303 is arranged at the other end of the connecting rod 301; the gear box 3 10 is provided with a gear 308 meshing with the racks 303 at both ends; a knob 304 is provided at the front end of the gear 308 and passes through the gear box 310; the front end of the fixed plate 307 is slidably connected to the bonding plate 306, and a plurality of bonding springs 309 are provided in the middle of the connection between the fixed plate 307 and the bonding plate 306; the connecting rod 301 is L-shaped, the connecting rod 301 is vertically connected to the fixed rod 302 in the vertical direction, and the end of the connecting rod 301 is vertically connected to the rack 303; the rack 303 is parallel to the fixed rod 302, and the racks 303 on both sides are respectively meshed with the gear 308 one above and one below; In this embodiment, when the device is in use, the knob 304 is turned to drive the gear 308 to rotate, so that the rack 303 meshing therewith slides, and the rack 303 drives the connecting rod 301 to slide, so that the connecting rod 301 drives the fixing rod 302 to slide in the hole on the fixing seat 305, so that the fixing rod 302 drives the fixing plate 307 at the front end to be relatively close, so that the fitting plate 306 fits the patient's head to fix the patient's head; After the fitting plate 306 fits the patient's head, the fitting spring 309 between the fixing plate 307 and the fitting plate 306 has an elastic effect, so that the fitting plate 306 follows the expansion and contraction of the fitting spring 309 to bend and fit the curve of the patient's head, thereby improving the fixation effect on the patient's head and improving the discomfort caused by the rigid clamping to the patient. In this embodiment, the two ends of the fitting plate 306 that are slidably connected to the fixed plate 307 are hard plates, and the middle part that fits the head is made of soft material; for example, medical silicone, which has good biocompatibility, wear resistance and flexibility, can adapt to the movement and shape changes of the body, and provide a comfortable fit; In this embodiment, the head fixing mechanism 3 can accurately adjust the position of the fixing plate 307 through the connection between the gear 308 and the rack 303, so that the fixing plate 307 can fit closely to the patient's head, thereby improving the effect of head fixation. The fitting spring 309 arranged between the fitting plate 306 and the fixing plate 307 can be telescopically adjusted according to the facial curve of the patient, so that the fitting plate 306 can be adaptively adjusted according to the concave and convex position of the patient's head, thereby improving the fixation comfort and fixation stability. Example

[0012] like Figure 1 , 2 As shown in , 6, the mandibular fixer 4 includes a rotating rod 401, a support plate 402, a telescopic rod 403, a telescopic limiting rod 404, and a telescopic spring 405; the rotating rod 401 is symmetrically arranged on both sides to be rotatably connected to the fixing rod 302, the rotating rod 401 is hollow, and a plurality of limiting grooves 406 are arranged on both sides; a support plate 402 is arranged in the middle of the telescopic rod 403, and telescopic springs 405 are arranged at the front and rear ends of the telescopic rod 403 respectively; a telescopic limiting rod 404 is arranged at the front end of the telescopic spring 405 to be movably connected to the rotating rod 401; In this embodiment, when the mandibular fixator 4 is in use, the telescopic rod 403 is pulled so that the telescopic limiting rod 404 compresses the telescopic spring 405, so that the limiting rod is freed from the restriction of the limiting groove 406, so that the telescopic rod 403 slides in the rotating rod 401. After being adjusted to a suitable position, the telescopic spring 405 pushes the telescopic limiting rod 404 into the limiting groove 406 through the resetting effect of the telescopic spring 405, so as to limit the telescopic rod 403. After the device is used, the mandibular fixator 4 can be rotated to the rear end of the device by pulling the rotating rod 401 and rotating along the fixing rod 302, so that the mandibular fixator 4 will not block the patient when the device is used next time, and the mandibular fixator 4 can be rotated to the patient after the patient lies down; In this embodiment, the mandibular fixator 4 is designed with a rotating rod 401 and a telescopic rod 403, so that the mandibular fixator 4 can accurately fix the mandibular part of the patient to ensure the stability of the mandibular position during radiotherapy. The mandibular fixator 4 works together with the head fixing mechanism 3 to ensure the overall stability of the patient's head during treatment, thereby improving the accuracy of radiotherapy. The design of the mandibular fixator 4 allows it to be easily rotated to the rear end of the device after the treatment is completed, avoiding obstruction of the patient's entry and exit of the treatment bed, facilitating the reuse of the device and the entry and exit of the patient. By effectively fixing the mandible, the involuntary movement of the patient during radiotherapy can be reduced, thereby reducing the risk of treatment deviation caused by movement.

[0013] In summary, the present invention designs the tilting mechanism 2. When the patient's head angle needs to be adjusted, the rocker 201 is rotated to make the rocker 201 drive the worm 204 to rotate, so that the worm 204 drives the turbine to rotate, and the turbine drives the rotating frame 211 to rotate, so that the sliding wheel 213 slides in the slide groove at the bottom of the tilting plate 214. Since the front end is a rotation connection, the sliding wheel 213 supports the rear end of the tilting plate 214, and the toothed tilting plate 214 tilts, so as to adjust the tilting angle of the tilting plate 214; thereby achieving the angle adjustment of the head; At the same time, the rack 303 is connected to the fixed plates 307 at both ends through the gear 308, and the rotating knob 304 drives the gear 308 to rotate, so that the rack 303 slides along the gear 308 to adjust the relative positions of the two fixed plates 307, and the slidingly connected fitting plate 306, when the fitting plate 306 fits the patient's head, the elastic effect of the fitting spring 309 set between the fitting plate 306 and the fixed plate 307 allows the fitting plate 306 to bend according to the patient's facial curve, so that the fitting plate 306 can fully fit the patient's face, improve the fixing effect and improve the patient's comfort.

[0014] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described.

Claims

1. A head positioning device for radiotherapy of head tumors, characterized in that: include: Bed, tilt mechanism, head fixation mechanism, mandibular fixator; The front end of the bed is provided with a tilting mechanism; the upper end of the tilting mechanism is provided with a head fixing mechanism; the head fixing mechanism is rotatably connected to the mandibular fixer; The tilting mechanism includes a rocker, a base, a rocker seat, a worm, a worm seat, a worm wheel, a rotating seat, a connecting rod, a connecting ring, a connecting seat, a rotating frame, a rotating rod, a sliding wheel, and a tilting plate; a connecting seat is arranged at the front end of the base, a rotating seat is arranged in the middle, a worm seat is arranged on the side of the rotating seat, and a rocker seat is arranged on the side of the end; a connecting rod is arranged in the connecting seat; a cross groove is provided on the rotating seat for rotationally connecting to the rotating frame, one side of the rotating frame is connected to the worm wheel in the horizontal direction, and a rotating rod is provided on the one side in the vertical direction; a sliding wheel is provided at the end of the rotating rod; the worm seat is rotationally connected to the worm; the worm meshes with the worm wheel, and a rocker is provided at one end of the worm to penetrate the rocker seat; a connecting ring is provided at the bottom of the end of the tilting plate for rotationally connecting to the connecting rod; a sliding groove is provided at the bottom of the front end of the tilting plate for sliding connection to the sliding wheel.

2. A head positioning device for head tumor radiotherapy according to claim 1, characterized in that: The depth of the slide groove at the bottom of the inclined plate is consistent with the depth of the cross groove of the rotating seat, and the bottom of the slide groove fits the base when the inclined plate reaches a horizontal position.

3. A head positioning device for head tumor radiotherapy according to claim 1, characterized in that: A supporting leg is arranged at the bottom of the bed body, and a hollow tilting box is arranged at the bottom of the front end of the bed body; a tilting mechanism is arranged in the tilting box, a round hole is arranged at the front end of the tilting box for the rocker to pass through, and a rectangular notch of the same size is arranged on the bed body at the position of the tilting plate slide.

4. A head positioning device for head tumor radiotherapy according to claim 1, characterized in that: The head fixing mechanism includes a connecting rod, a fixing rod, a rack, a knob, a fixing seat, a fitting plate, a gear, a fitting spring, and a gear box; the fixing seats are symmetrically arranged on both sides of the front end of the inclined plate, and a gear box is arranged in the middle; holes are respectively provided on the fixing seats to arrange fixing rods; a connecting rod is arranged at the rear end of the fixing rod, and a fixing plate is arranged at the front end; a rack is arranged at the other end of the connecting rod; racks are arranged at both ends of the gear meshing inside the gear box; a knob is arranged at the front end of the gear and passes through the gear box; the front end of the fixing plate is slidably connected to the fitting plate, and a plurality of fitting springs are arranged in the middle of the connection between the fixing plate and the fitting plate.

5. A head positioning device for head tumor radiotherapy according to claim 4, characterized in that: The connecting rod is L-shaped, the connecting rod is vertically connected to the fixed rod, and the end of the connecting rod is vertically connected to the rack.

6. A head positioning device for head tumor radiotherapy according to claim 4, characterized in that: The rack is parallel to the fixed rod, and the racks on both sides are respectively engaged with the gears one above and one below.

7. A head positioning device for head tumor radiotherapy according to claim 1, characterized in that: The mandibular fixer comprises a rotating rod, a supporting plate, a telescopic rod, a telescopic limiting rod, and a telescopic spring; the rotating rod is symmetrically provided with fixing rods that are respectively rotatably connected on both sides, the rotating rod is hollow, and a plurality of limiting grooves are provided on both sides; a supporting plate is provided in the middle of the telescopic rod, and telescopic springs are respectively provided at the front and rear ends of the telescopic rod; a telescopic limiting rod is provided at the front end of the telescopic spring and is movably connected to the rotating rod.

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