Thermoplastic film assisted clamping mechanism for radiotherapy

Abstract

The utility model discloses a thermoplastic film auxiliary clamping mechanism for radiotherapy, including auxiliary positioning board body, the left and right sides of auxiliary positioning board body are provided with the traction type positioning clamping strip seat, the inside surface sliding of traction type positioning clamping strip seat is connected with the positioning lever piece, the outer surface of positioning lever piece is connected with the locking sleeve through screw thread, the outer surface of locking sleeve extrudes the outer surface of auxiliary positioning board body, the upper surface fixed connection of traction type positioning clamping strip seat has the positioning shaft, the outer surface sleeve joint of positioning shaft has extruded strip block, the outer surface of positioning shaft is provided with the outer thread, the outer surface of positioning shaft is connected with the locking nut through screw thread, the outer surface fixed connection of locking nut has the handle, adopts the large area pressure tight structure, and extrusion thermoplastic film is stable, and its extrusion positioning subassembly can be adjusted to pull outwards alone, can be taut film, its mechanism is simple, and the cost is low, and convenient operation is convenient for medical field large -area collection use.

Description

Technical Field

[0001] This utility model relates to the field of thermoplastic film auxiliary clamping mechanism for radiotherapy, and more specifically, to a thermoplastic film auxiliary clamping mechanism for radiotherapy. Background Technology

[0002] Radiotherapy, short for radiation therapy, uses alpha, beta, and gamma rays produced by radioactive isotopes and radiation from various accelerators to treat malignant tumors. It explains that radiotherapy uses high-energy rays such as X-rays and gamma rays to precisely irradiate tumor tissue. The radiation causes ionization, damaging the DNA of tumor cells and leading to their death. It mentions utilizing differences in cell sensitivity to kill abnormal cells, further explaining how it inhibits growth and division by destroying DNA structure. These principles need to be integrated to explain the mechanism of action of radiotherapy, including specific implementation methods such as radioactive seed implantation. In the field of radiotherapy, ensuring that patients maintain a consistent body position during each treatment is extremely important. Importantly, to ensure that the radiation dose is accurately delivered to the target area while minimizing the impact on surrounding healthy tissues, traditional fixation methods, such as sandbags, foam pads, or handmade plaster molds, while providing some fixation, are significantly insufficient in terms of accuracy, comfort, and efficiency. In recent years, the emergence of thermoplastic film-assisted clamping devices has greatly improved the patient fixation effect during radiotherapy; however, in actual use, due to the flexibility of the thermoplastic film after heating, it may create a certain gap between the film and the patient after covering the patient area or after cooling for a period of time, resulting in less tight contact with the patient's body, which can lead to movement of the patient's body.

[0003] Among its existing technical patents, such as the invention disclosed in application publication number CN118903714A, is an auxiliary clamping device for thermoplastic film in radiotherapy, which relates to the field of radiotherapy technology. It includes a base plate, on which a clamping mechanism for clamping thermoplastic film is provided. Two sets of positioning mechanisms are slidably provided on the left and right sides of the base plate, and a locking mechanism is slidably provided on the positioning mechanism along the front-back direction. An auxiliary mechanism is provided on the clamping mechanism for locking in conjunction with the locking mechanism. The locking mechanism is used to lock the position of the auxiliary mechanism. The positioning mechanism can be locked on the base plate. This invention, through the cooperative arrangement between the locking mechanism, the auxiliary mechanism and the clamping mechanism, can facilitate the tightening effect of the thermoplastic film during radiotherapy.

[0004] The aforementioned patents employ a multi-point extrusion structure, which results in unstable extrusion. Furthermore, the locking structure and pulling mechanism are overly complex, making them inflexible, inconvenient to operate, and costly to use in large-area medical collection. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide an auxiliary clamping mechanism for radiotherapy thermoplastic film. It adopts a large-area compression structure, which stabilizes the thermoplastic film. Its compression positioning component can be adjusted and pulled outwards independently to tighten the film. The mechanism is simple, low-cost, and easy to operate, making it convenient for large-area collection and use in the medical field.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A thermoplastic film auxiliary clamping mechanism for radiotherapy includes an auxiliary positioning plate. Traction-type positioning clamping strips are provided on the left and right sides of the auxiliary positioning plate. Positioning rods are slidably inserted into the inner surface of each traction-type positioning clamping strip. Locking sleeves are threaded onto the outer surfaces of the positioning rods, and the outer surfaces of the locking sleeves press against the outer surfaces of the auxiliary positioning plate. A positioning shaft is fixedly connected to the upper surface of the traction-type positioning clamping strips. A pressing strip is sleeved on the outer surface of the positioning shaft. External threads are provided on the outer surface of the positioning shaft, and a locking nut is threaded onto the outer surface of the positioning shaft. A handle is fixedly connected to the outer surface of the locking nut. This mechanism employs a large-area compression structure, ensuring stable compression of the thermoplastic film. Its compression positioning components can be individually adjusted and pulled outwards to tighten the film. The mechanism is simple, low-cost, and easy to operate, facilitating large-area collection in the medical field.

[0008] Furthermore, the lower surface of the extrusion strip is provided with an arc-shaped concave surface, and the upper surface of the traction-type positioning clamp seat is provided with an arc-shaped bulge surface.

[0009] Furthermore, the lower surface of the extrusion strip is covered with a rubber layer, and the upper surface of its traction-type positioning clamp seat is covered with a rubber layer.

[0010] Furthermore, the surface of the traction-type positioning clamp seat is provided with a positioning ring groove, which is located on the upper surface of the positioning shaft, and a spring is placed on the inner surface of the positioning ring groove.

[0011] Furthermore, the spring presses upward against the lower surface of the compression bar.

[0012] Furthermore, the handle is welded and fixed to the outer surface of one side of the locking nut, and its handle adopts a strip-shaped structure.

[0013] Furthermore, the auxiliary positioning plate adopts a convex plate structure, and raised strip structures are provided on the left and right sides of the auxiliary positioning plate. The traction-type positioning clamp seat is attached to the outer side of the raised strip of the auxiliary positioning plate.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) It adopts a large-area pressing structure, which stabilizes the extruded thermoplastic film. Its extrusion positioning component can be adjusted and pulled outwards independently to tighten the film. Its mechanism is simple, low-cost, and easy to operate, making it convenient for large-area collection and use in the medical field. Attached Figure Description

[0016] Figure 1 This is a first schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a second schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a top view of the overall structure of this utility model;

[0019] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0020] Figure 5 This is a partial structural diagram of the towable positioning clip seat of this utility model.

[0021] Explanation of the labels in the diagram:

[0022] 1. Auxiliary positioning plate, 2. Tractionable positioning clamp seat, 3. Positioning rod, 4. Locking sleeve, 5. Extrusion block, 6. Positioning shaft, 7. Locking nut, 8. Handle, 9. Positioning ring groove, 10. Spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figure 1-5A thermoplastic film auxiliary clamping mechanism for radiotherapy includes an auxiliary positioning plate 1. Pullable positioning clamping strip seats 2 are provided on the left and right sides of the auxiliary positioning plate 1. Positioning rods 3 are fixed to the outer surface of the pullable positioning clamping strip seats 2. The outer surface of the positioning rods 3 slides through the inner surface of the auxiliary positioning plate 1. A positioning groove is provided on the inner side of the auxiliary positioning plate 1 for sliding insertion of the positioning rods 3. The positioning rods 3 are slidably connected to the inner surface of the auxiliary positioning plate 1. A locking sleeve 4 is threadedly connected to the outer surface of the positioning rods 3. The surface is pressed onto the outer surface of the auxiliary positioning plate 1. The upper surface of the traction-type positioning clamp seat 2 is fixedly connected to the positioning shaft 6. The outer surface of the positioning shaft 6 is sleeved with the extrusion strip 5. The outer surface of the positioning shaft 6 is provided with external threads. The outer surface of the positioning shaft 6 is connected to the locking nut 7 through the threads. The outer surface of the locking nut 7 is fixedly connected to the handle 8. The large-area pressing structure is adopted, and the extrusion thermoplastic film is stable. Its extrusion positioning component can be adjusted and pulled outwards independently to tighten the film. Its mechanism is simple, low-cost, and easy to operate, making it convenient for large-area collection in the medical field.

[0026] The lower surface of the extrusion strip 5 is provided with an arc-shaped concave surface, and the upper surface of the traction-type positioning clamping strip seat 2 is provided with an arc-shaped bulging surface; the concave and convex surfaces can be used for extrusion during clamping, which can clamp and fix the thermoplastic film and is easy to hold.

[0027] The lower surface of the extrusion strip 5 is covered with a rubber layer, and the upper surface of its traction-type positioning clamp 2 is covered with a rubber layer; this increases frictional damping, resulting in greater friction when clamping the thermoplastic film and preventing slippage.

[0028] The surface of the pullable positioning clamp seat 2 is provided with a positioning ring groove 9, which is located on the upper surface of the positioning shaft 6. A spring 10 is placed on the inner surface of the positioning ring groove 9. The spring 10 presses upward against the lower surface of the extrusion strip 5. This facilitates the automatic lifting of the extrusion strip 5 when it is loosened, making it easy to open and introduce the thermoplastic film, and making it convenient to use.

[0029] The handle 8 is welded and fixed to the outer surface of one side of the locking nut 7. The handle 8 adopts a strip-shaped structure, which facilitates the twisting and rotation of the locking nut 7.

[0030] The auxiliary positioning plate 1 adopts a convex plate structure, with raised strips on both the left and right sides. The pullable positioning clamp 2 fits against the outer side of the raised strips on the auxiliary positioning plate 1; it is fitted and positioned with a gap to facilitate the rotation of the locking sleeve. A positioning shaft 6 is fixedly connected to the upper surface of the pullable positioning clamp 2. A pressing strip 5 is sleeved on the outer surface of the positioning shaft 6. The outer surface of the positioning shaft 6 has external threads, and a locking nut 7 is threadedly connected to the outer surface of the positioning shaft 6. A handle 8 is fixedly connected to the outer surface of the locking nut 7. A positioning ring is provided on the surface of the pullable positioning clamp 2. The positioning ring groove 9 is located on the upper surface of the positioning shaft 6, and a spring 10 is placed on the inner surface of the positioning ring groove 9. The spring 10 presses upward against the lower surface of the extrusion strip 5. This facilitates the automatic lifting of the extrusion strip 5 when it is loosened, making it easy to open and introduce the thermoplastic film. It is convenient to use. After lifting the extrusion strip 5, the thermoplastic film can be placed between the pullable positioning clamp seat 2 and the extrusion strip 5. By turning the locking nut 7 through the handle 8, the extrusion strip 5 can be pressed and the thermoplastic film can be clamped and fixed without being pulled outward. This is convenient for clamping thermoplastic film over a large area. It is easy to clamp, convenient to use, has a simple mechanism, and is low in cost.

[0031] When the thermoplastic film is pulled outward, the left and right sides of the auxiliary positioning plate 1 are provided with pullable positioning clamp seats 2. The outer surface of the pullable positioning clamp seats 2 is fixed with positioning rods 3. The inner surface of the auxiliary positioning plate 1 is slidably connected to the positioning rods 3. The outer surface of the positioning rods 3 is connected to the locking sleeves 4 by threads. The outer surface of the locking sleeves 4 is pressed against the outer surface of the auxiliary positioning plate 1. The locking sleeves 4 can be rotated to fit the auxiliary positioning plate 1 and rotate to press outward. The positioning rods 3 can be slid outward, and the pullable positioning clamp seats 2 can be pulled outward to pull the thermoplastic film to tighten. It is convenient to use and easy to operate.

[0032] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A radiotherapy thermoplastic film assisted clamping mechanism comprising an assisted positioning plate body (1), characterized in that: The auxiliary positioning plate (1) is provided with a pullable positioning clamp seat (2) on the left and right sides. The outer surface of the pullable positioning clamp seat (2) is fixedly connected with a positioning rod (3). The outer surface of the positioning rod (3) slides through the inner surface of the auxiliary positioning plate (1). The outer surface of the positioning rod (3) is connected with a locking sleeve (4) by a thread. The outer surface of the locking sleeve (4) is pressed against the outer surface of the auxiliary positioning plate (1). The upper surface of the pullable positioning clamp seat (2) is fixedly connected with a positioning shaft (6). The outer surface of the positioning shaft (6) is sleeved with a pressing strip (5). The outer surface of the positioning shaft (6) is provided with an external thread. The outer surface of the positioning shaft (6) is connected with a locking nut (7) by a thread. The outer surface of the locking nut (7) is fixedly connected with a handle (8).

2. The thermoplastic film assisted clamping mechanism for radiotherapy of claim 1, wherein: The lower surface of the extrusion strip (5) is provided with an arc-shaped concave surface, and the upper surface of the traction-type positioning clamp (2) is provided with an arc-shaped bulging surface.

3. The thermoplastic film assisted clamping mechanism for radiotherapy of claim 1, wherein: The lower surface of the extrusion strip (5) is covered with a rubber layer, and the upper surface of its traction-type positioning clamp (2) is covered with a rubber layer.

4. The thermoplastic film assisted clamping mechanism for radiotherapy of claim 1, wherein: The surface of the traction-type positioning clamp seat (2) is provided with a positioning ring groove (9), which is located on the upper surface of the positioning shaft (6), and a spring (10) is placed on the inner surface of the positioning ring groove (9).

5. The thermoplastic film assisted clamping mechanism for radiotherapy of claim 4, wherein: The spring (10) presses upward against the lower surface of the compression bar (5).

6. The thermoplastic film assisted clamping mechanism for radiotherapy of claim 1, wherein: The handle (8) is welded and fixed to the outer surface of one side of the locking nut (7), and the handle (8) adopts a strip structure.

7. The thermoplastic film assisted clamping mechanism for radiotherapy of claim 1, wherein: The auxiliary positioning plate (1) adopts a convex plate structure, and protruding strip structures are provided on the left and right sides of the auxiliary positioning plate (1). The traction-type positioning clamp seat (2) is attached to the outer side of the protruding strip of the auxiliary positioning plate (1).

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