Shielding structure of 180-degree treatment head

Abstract

The utility model discloses a shielding structure of a 180-degree treatment head, and relates to the field of proton and heavy ion treatment instruments, in particular to the shielding structure of the 180-degree treatment head. The fixed box is fixed on a treatment head shell, the fixed sheet is fixed on the inner wall of one side of the fixed box, the linkage sheet is rotatably connected in the fixed box, the driving sheet is rotatably connected on the inner wall of the other side of the fixed box, the linkage sheet and the driving sheet are coaxially arranged, a torsion spring is arranged in the fixed box, and the torsion spring is arranged in the fixed box. The torsion spring is coaxially arranged on a rotating shaft of the linkage piece in a sleeved mode, one end of the torsion spring is connected with the fixing piece in a clamped mode, the other end of the torsion spring is connected with the driving piece in a clamped mode, and a linkage structure is further arranged among the fixing piece, the linkage piece and the driving piece. The shielding structure is always in an unfolded state, so that a gap between the movable floor and the treatment head can be shielded, and the treading risk of medical staff is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of proton heavy ion therapy apparatus, in particular to a shielding structure of a 180-degree treatment head. BACKGROUND

[0002] It is known that the proton heavy ion therapy apparatus forms a Bragg peak by accelerating protons or heavy ions, realizes precise dose delivery to tumors, reduces damage to normal tissues, and opens a new era of precise radiotherapy for tumors.

[0003] Among them, the 180-degree rotatable treatment head is installed on the movable floor and can rotate with the isocenter, which enables doctors to irradiate tumors from different angles according to the specific position and shape of the tumor, improving the flexibility and accuracy of treatment. For example, for some irregularly shaped or located in complex anatomical position tumors, by adjusting the angle of the treatment head, the Bragg peak can better cover the tumor while avoiding surrounding important organs and tissues.

[0004] However, the 180-degree rotatable treatment head currently in use has exposed serious safety hazards in actual operation. When the treatment head is turned to some specific angles, especially when it is in a horizontal position with the ground, a large gap will be formed between the treatment head and the movable floor. The appearance of this gap makes it easy for the treating doctor to fall during daily operation, observation of patients and equipment debugging, and poses a great risk of injury, directly threatening the personal safety of medical staff. Therefore, it is particularly important to develop a technology that can shield the gap generated by the rotating treatment head. CONTENT OF THE INVENTION

[0005] In order to improve the problem that a large gap will be formed between the treatment head and the movable floor when the treatment head is turned to some specific angles, especially when it is in a horizontal position with the ground, the present application provides a shielding structure of a 180-degree treatment head.

[0006] The shielding structure of a 180-degree treatment head provided by the present application adopts the following technical scheme:

[0007] A shielding structure of a 180-degree treatment head, the shielding structure is installed on the treatment head shell, comprising a fixed box fixed on the treatment head shell, a fixed sheet fixed on the inner wall of one side of the fixed box, a linkage sheet rotatably connected in the fixed box, a driving sheet rotatably connected on the inner wall of the other side of the fixed box, the linkage sheet and the driving sheet are coaxially arranged, a torsional spring is arranged in the fixed box, the torsional spring is coaxially sleeved on the rotating shaft of the linkage sheet, one end of the torsional spring is clamped with the fixed sheet, the other end of the torsional spring is clamped with the driving sheet, and a linkage structure is further arranged between the fixed sheet, the linkage sheet and the driving sheet.

[0008] By adopting the above technical scheme, when the treatment head is in working operation, the two ends of the torsion spring are respectively clamped with the fixed sheet and the driving sheet, and the linkage structure between the fixed sheet, the linkage sheet and the driving sheet can realize the cooperative work of the fixed sheet, the linkage sheet and the driving sheet, so that the shielding structure is always in an unfolded state, thereby the gap between the movable floor and the treatment head can be shielded, and the risk of stepping on by medical staff can be effectively avoided.

[0009] Optionally, the linkage structure comprises a first rod fixed on the driving sheet, a second rod fixed on the linkage sheet, a first slot opened on the linkage sheet, and a second slot opened on the fixed sheet, the fixed sheet, the linkage sheet and the driving sheet are sequentially connected, the second rod on one of the linkage sheets between two adjacent linkage sheets slides in the first slot on the other linkage sheet, the first rod slides in the first slot on the linkage sheet close to the driving sheet, and the second rod on the linkage sheet close to the fixed sheet slides in the second slot.

[0010] By adopting the above technical scheme, in the working process of the treatment head, one end of the torsion spring drives the driving sheet to rotate, and then drives the first rod fixed on the driving sheet to slide in the first slot opened on the linkage sheet close to the driving sheet, and then drives the second rod on one of the linkage sheets between two adjacent linkage sheets to slide in the first slot on the other linkage sheet, so as to sequentially drive each linkage sheet to rotate, and the second rod on the linkage sheet close to the fixed sheet slides in the second slot on the fixed sheet, and the fixed sheet is fixed on the inner wall of the fixed box. Thus, the torsion spring drives the driving sheet to rotate, and then the driving sheet drives the linkage sheet to rotate, so as to shield the gap formed between the treatment head and the movable floor, and provide reliable protection for the safety of medical staff.

[0011] Optionally, the linkage structure is provided with multiple groups.

[0012] By adopting the above technical scheme, by providing multiple groups of linkage structures, the shielding structure can be more stable in the unfolded state, and the gap between the treatment head and the sliding floor can be better shielded.

[0013] Optionally, a limiting block is fixed on the side of the driving sheet away from the linkage sheet, and a baffle for blocking the movement of the limiting block is fixed on the inner wall of the fixed box.

[0014] By adopting the above technical scheme, the limiting block can freely move within a certain range with the driving sheet, and drive the entire linkage structure to realize the unfolding or contraction of the shielding structure. When the driving sheet rotates to the limit position, the limiting block will contact the baffle, which can effectively block the movement of the limiting block, thereby limiting the further rotation of the driving sheet, ensuring that each component in the linkage structure operates within the normal working range, and avoiding faults caused by excessive rotation.

[0015] Optionally, the fixing box is fixed with a connecting plate, the connecting plate is fixed with an arc-shaped slot on one side of the treatment head shell, and the arc-shaped edge of the treatment head shell is embedded in the arc-shaped slot.

[0016] By adopting the above technical scheme, the arc-shaped slot is arranged on one side of the connecting plate and the treatment head shell, so that the contact area between the connecting plate and the treatment head shell is increased, and the connection between the connecting plate and the treatment head shell is more stable.

[0017] To sum up, the present application has at least one of the following beneficial technical effects:

[0018] Since there is a gap between the treatment head and the movable floor during rotation of the treatment head, the shielding structure is clamped at one end of the torsion spring and the fixed sheet, and at the other end of the torsion spring and the driving sheet. During the operation of the treatment head, one end of the torsion spring drives the driving sheet to rotate, thereby driving the first rod fixed on the driving sheet to slide in the first slot arranged on the linkage sheet close to the driving sheet, further driving the second rod on one of the adjacent two linkage sheets to slide in the first slot on the other linkage sheet, realizing the rotation of each linkage sheet in turn, and the second rod on the linkage sheet close to the fixed sheet slides in the second slot on the fixed sheet, and the fixed sheet is fixed on the inner wall of one side of the fixed box, so that the shielding structure is unfolded along the length direction of the driving sheet, and the gap formed between the treatment head and the movable floor can be shielded, providing reliable protection for the safety of medical staff, and effectively avoiding the risk of stepping into the gap during operation of the doctor. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a whole schematic view of the treatment head shell provided by the embodiments of the present application, used to show the shielding structure;

[0021] Figure 2 is a schematic view of the shielding structure provided by the embodiments of the present application;

[0022] Figure 3 is a partial structure schematic view of the shielding structure provided by the embodiments of the present application, used to show the torsion spring;

[0023] Figure 4 is a partial structure schematic view of the shielding structure provided by the embodiments of the present application; Figure 2 is an enlarged view of part A in the above-mentioned schematic view;

[0024] Figure 5 is provided by the embodiment of the present application Figure 2 is a local enlarged view of B in FIG. 1;

[0025] Figure 6 is a partial structural schematic view of the fixing box provided by the embodiment of the present application, for showing the limiting block and the baffle.

[0026] Reference signs: 1, treatment head shell; 2, fixing box; 3, fixing piece; 4, linkage piece; 5, driving piece; 6, torsional spring; 7, linkage structure; 701, first rod; 702, second rod; 703, first slot; 704, second slot; 8, limiting block; 9, baffle; 10, connecting plate. DETAILED DESCRIPTION

[0027] The following will be described in detail in combination with the accompanying Figures 1-6 The present application is further described in detail.

[0028] The embodiment of the present application discloses a shielding structure of a 180-degree treatment head.

[0029] During the treatment or test process, the staff controls the rotation of the treatment head, and the corresponding rotation angle of the treatment head in the embodiment is one hundred and eighty degrees. It is known that the cross section of the existing treatment head shell 1 is rectangular, and in the embodiment, the four corners of the treatment head shell 1 are all arranged in a circular arc shape.

[0030] Referring to Figure 1 , the shielding structure of the 180-degree treatment head comprises a connecting plate 10, and in the embodiment, the connecting plate 10 is installed at the four corners of the treatment head shell 1. In addition, an arc-shaped slot is formed on the side of the connecting plate 10 abutting against the treatment head shell 1, so that the contact area between the inner side of the connecting plate 10 and the treatment head shell 1 is greatly increased, thereby realizing that the connecting plate 10 and the treatment head shell 1 are connected more firmly and stably.

[0031] Referring to Figure 2 and Figure 3 , one side of the connecting plate 10 is provided with a shielding structure, and the shielding structure comprises a fixing box 2, a fixing piece 3, a linkage piece 4, a driving piece 5 and a torsional spring 6. Among them, the shape of the fixing box 2 is circular, and the fixing box 2 is provided with a fan-shaped opening, which reserves a certain movement space for the driving piece 5, the linkage piece 4, the fixing piece 3 and the torsional spring 6.

[0032] In addition, the drive plate 5 is rotatably connected to one inner wall of the fixed box 2, the fixed plate 3 is fixedly connected to the other inner wall of the fixed box 2, and the linkage plate 4 is located between the drive plate 5 and the fixed plate 3. In this embodiment, the optimal number of linkage plates 4 is eleven. The linkage plate 4, drive plate 5, and fixed plate 3 are all coaxially arranged. The torsion spring 6 is disposed inside the fixed box 2 and is coaxially sleeved on the rotating shaft of the linkage plate 4. One end of the torsion spring 6 is engaged with the fixed plate 3, and the other end of the torsion spring 6 is engaged with the drive plate 5, so that one end of the torsion spring 6 can drive the drive plate 5 to rotate. One side of the fixed plate 3 is fixedly installed on the inner wall of the fixed box 2, restricting the fixed plate 3 from moving with the change of the torsion spring 6. In addition, a linkage structure 7 is also provided between the fixed plate 3, linkage plate 4, and drive plate 5.

[0033] Reference Figure 4 and Figure 5 The linkage structure 7 includes a first rod 701, a second rod 702, a first groove 703, and a second groove 704. Specifically, the first rod 701 on the drive plate 5 slides into the first groove 703 on the linkage plate 4 closest to the drive plate 5. Between two adjacent linkage plates 4, the second rod 702 on one of the linkage plates 4 slides into the first groove 703 on its adjacent linkage plate 4, and the second rod 702 on the linkage plate 4 closest to the fixed plate 3 slides into the second groove 704 on the fixed plate 3, thus achieving sequential connection of the fixed plate 3, linkage plate 4, and drive plate 5.

[0034] Reference Figure 3 , Figure 4 and Figure 5 During the operation of the treatment head, one end of the torsion spring 6 drives the drive plate 5 to rotate, thereby triggering the linkage structure 7. This causes the first rod 701 on the drive plate 5 to slide within the first groove 703 on the linkage plate 4 closest to the drive plate 5, which in turn causes the two adjacent linkage plates 4 to slide. Specifically, the second rod 702 on one of the linkage plates 4 slides within the first groove 703 on its adjacent linkage plate 4, thereby sequentially driving each linkage plate 4 to rotate. This further causes the second rod 702 on the linkage plate 4 closest to the fixed plate 3 to slide within the second groove 704 on the fixed plate 3. This mechanism, where the torsion spring 6 drives the drive plate 5 to rotate, and the drive plate 5 in turn drives the linkage plate 4 to rotate, effectively blocks the gap between the treatment head and the raised floor, providing reliable safety for medical personnel.

[0035] Furthermore, in this embodiment, multiple sets of linkage structures 7 are provided, and these multiple sets of linkage structures 7 are arranged sequentially along the length direction of the treatment head housing 1, thereby ensuring that the shielding structure is more stable and smooth during the unfolding process, and quickly shielding the gap between the treatment head and the sliding floor.

[0036] Reference Figure 6A limiting block 8 is fixed on one side of the driving piece 5, and a baffle 9 is fixed on the inner wall of the fixed box 2, and the baffle 9 and the limiting block 8 are arranged on the same side of the fixed box 2. Therefore, when the driving piece 5 rotates to the limit position, the limiting block 8 will be in contact with the baffle 9, which can effectively block the limiting block 8 from moving further, avoiding faults caused by excessive rotation.

[0037] The implementation principle of the shielding structure of the 180-degree treatment head is as follows: since the treatment head needs to realize 180-degree flexible rotation, a certain space needs to be reserved between the treatment head and the movable floor supported thereby to ensure that the treatment head is not hindered during rotation. However, when the treatment head and the movable floor are synchronously and centrally rotated to the horizontal position, a large gap will be formed between the treatment head and the movable floor. This leads to the fact that the doctor is extremely likely to step on the gap during daily operation, observation of patients, and equipment debugging. To solve the above problem, the force acting on the torsional spring 6 drives one end of the torsional spring 6 to rotate the driving piece 5, triggers the linkage structure 7, and under the joint action of the first rod 701, the second rod 702, the first slot 703, and the second slot 704, the driving piece 5 drives the linkage piece 4 to rotate in sequence, so that the driving piece 5 and the linkage piece 4 are in an unfolded state, thereby being able to shield the gap between the treatment head and the movable floor and providing strong protection for the safety of medical staff.

[0038] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the usual meaning understood by a person with ordinary skill in the art to which the present application belongs. The terms "first", "second", "third", and the like used in the specification and claims of the present application do not represent any order, number, or importance, but are only used to distinguish different components. The terms "one" or "a" and the like do not represent a quantity limitation, but represent the existence of at least one. The terms "include" or "contain" and the like mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right", and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0039] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A shielding structure of a 180-degree treatment head, which is mounted on a treatment head housing (1), characterized in that: The utility model relates to a fixing box (2) fixed on the treatment head shell (1), a fixing sheet (3) fixed on the inner wall of one side of the fixing box (2), a linkage sheet (4) rotationally connected in the fixing box (2), a driving sheet (5) rotationally connected on the inner wall of the other side of the fixing box (2), the linkage sheet (4) and the driving sheet (5) are coaxially arranged, a torsional spring (6) is arranged in the fixing box (2), the torsional spring (6) is coaxially sleeved on the rotating shaft of the linkage sheet (4), one end of the torsional spring (6) is clamped with the fixing sheet (3), the other end of the torsional spring (6) is clamped with the driving sheet (5), and linkage structure (7) is further arranged between the fixing sheet (3), the linkage sheet (4) and the driving sheet (5).

2. A shield for a 180 degree treatment head according to claim 1, wherein: The linkage structure (7) includes a first rod (701) fixed on the driving sheet (5), a second rod (702) fixed on the linkage sheet (4), a first slot (703) formed in the linkage sheet (4), and a second slot (704) formed in the fixing sheet (3), the fixing sheet (3), the linkage sheet (4) and the driving sheet (5) are sequentially connected, and the second rod (702) on one of the linkage sheets (4) slides in the first slot (703) on the other linkage sheet (4), the first rod (701) slides in the first slot (703) on the linkage sheet (4) close to the driving sheet (5), and the second rod (702) on the linkage sheet (4) close to the fixing sheet (3) slides in the second slot (704).

3. A shield for a 180 degree treatment head according to claim 2, wherein: The linkage structure (7) is provided with multiple groups.

4. The shield structure of a 180-degree treatment head according to claim 1, characterized in that: The driving sheet (5) is fixed with a limiting block (8) on the side away from the linkage sheet (4), and the inner wall of the fixing box (2) is fixed with a baffle (9) for blocking the movement of the limiting block (8).

5. A shield for a 180 degree treatment head according to claim 1, wherein: The fixing box (2) is fixed with a connecting plate (10), the connecting plate (10) is provided with an arc-shaped groove on one side of the treatment head shell (1), the arc-shaped edge of the treatment head shell (1) is embedded in the arc-shaped groove, and the connecting plate (10) is fixedly connected with the treatment head shell (1).

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