Photodynamic treatment frame

Abstract

The invention belongs to the technical field of medical instruments, and discloses a photodynamic therapy frame. Comprising a machine body and a light-emitting plate, the light-emitting plates comprise a plurality of first irradiation plates and a plurality of second irradiation plates, and a positioning device is connected between every two adjacent first irradiation plates so that the first light-emitting plates can be hinged to each other and the angles of the first light-emitting plates can be fixed. The multiple second irradiation plates are longitudinally connected with the back face of the first irradiation plate in a sliding mode, and a speed limiting device is connected between the first irradiation plate and the second irradiation plates in a sliding mode to limit the sliding distance of the second irradiation plates. The problems that in the prior art, diseased parts are not regular in shape, and a light-emitting plate does not have an adjusting function and cannot meet the irradiation requirements of different focuses are solved.

Description

Technical Field

[0001] The invention relates to the field of medical device technology, specifically to a photodynamic therapy frame. Background Technology

[0002] Photodynamic therapy basically involves applying light of a specific wavelength to a patient's skin to repair damage, destroy unwanted cells, or provide information that can be used to diagnose various skin conditions.

[0003] During treatment, the patient wears protective goggles and lies on the treatment bed, adjusting the position of the photodynamic therapy device's output shield to target the affected area. Depending on the need, the device emits high-purity, high-power-density red, blue, and yellow light to irradiate the skin. It uses continuous or pulsed light to alter cell structure, kill bacteria, and provide a suitable environment for new cells.

[0004] In treatment rooms, existing photodynamic therapy devices typically have fixed, non-adjustable light-emitting panels. Therefore, it's inconvenient to place several devices and their associated treatment beds simultaneously, as the angles of the light-emitting panels vary depending on the affected area. Furthermore, since the affected area is not a regular shape, some areas require treatment while others do not. Existing devices irradiate the entire affected area, causing some damage to healthy tissue. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a photodynamic therapy frame to solve the problems that existing technologies have non-regularly shaped lesion sites and lack adjustable light-emitting panels that cannot adapt to the irradiation needs of different lesions.

[0006] A photodynamic therapy frame includes a body and a light-emitting plate, wherein one side of the light-emitting plate is connected to the body; The light-emitting plate includes a first irradiation plate and a second irradiation plate. There are multiple first irradiation plates arranged linearly in sequence. A positioning device is connected between adjacent first irradiation plates so that the first irradiation plates can be adjusted and locked. There are multiple second irradiation plates and they are horizontally and longitudinally slidably connected to the side of the first irradiation plate away from the light-emitting side. A speed limiting device is slidably connected between the first irradiation plate and the second irradiation plate to limit the sliding distance of the second irradiation plate.

[0007] Furthermore, the positioning device includes: a fixed block, a rotating shaft, an elastic element, and a connecting rod. The fixed block and the rotating shaft are respectively arranged between two adjacent first irradiation plates. The rotating shaft has a first groove radially opened at one end near the fixed block, and one end of the elastic element is located in the first groove. The fixed block has a groove on the side near the rotating shaft so that the rotating shaft can extend into it. One end of the elastic element extends out of the first groove and slides against the groove to limit the angle. The connecting rod is located between two adjacent rotating shafts.

[0008] Furthermore, the elastic element includes a first spring and a first sliding rod. One end of the first sliding rod passes through and is slidably connected to the first sliding groove. The end of the sliding rod near the groove is arc-shaped, and the first spring is located between the sliding rod and the first sliding groove.

[0009] Furthermore, a second sliding groove is connected to the outer side of the second irradiation plate. The speed limiting device includes a fixed rod, a second sliding rod, and a second spring. One end of the fixed rod is slidably connected to the second sliding groove, and the other end of the fixed rod is slidably connected to the back of the first irradiation plate. A third sliding groove is provided at the end of the fixed rod that extends into the second sliding groove. One end of the second sliding rod extends into the third sliding groove and is slidably connected thereto. One end of the second spring abuts against the outer side of the second sliding rod, and the other end of the second spring abuts against the third sliding groove. One end of the second sliding rod is slidably connected to the second sliding groove.

[0010] Furthermore, an adjustment device is connected to the back of the second irradiation plate located at both ends of the machine body. The first irradiation plate is laterally slidably connected to a first adjustment rod and passes through the adjustment device. The first irradiation plate is longitudinally slidably connected to a second adjustment rod and passes through the adjustment device. The adjustment device limits the sliding distance between the first adjustment rod and the second adjustment rod.

[0011] Furthermore, the adjustment device includes: a stabilizing block, a third sliding rod, a third spring, and a clamping block. The fixing block is fixedly connected to the back of the second irradiation plate. One end of the first adjusting rod and the second adjusting rod passes through the fixing block and is slidably connected to the fixing block. A fourth sliding groove is provided in the fixing block. The clamping block is slidably connected to the fourth sliding groove. One end of the third sliding rod passes through the fourth sliding groove and is fixedly connected to the clamping block. The third spring is located between the fourth sliding groove and the clamping block to support the clamping block. The fourth sliding groove and the clamping block have multiple clamping positions corresponding to the first adjusting rod and the second adjusting rod, respectively.

[0012] Furthermore, the clamping block is arc-shaped to conform to the shape of the adjusting rod.

[0013] Furthermore, the length of the second adjusting rod is greater than that of the first adjusting rod, so that when the second irradiation plate moves longitudinally, it can exceed the area of ​​the first irradiation plate.

[0014] Furthermore, a rolling wheel is rotatably connected to one end of the second slide bar near the second slide groove. The rolling wheel rolls on the inner wall of the second slide groove to reduce wear.

[0015] Furthermore, the outer side of the rolling wheel is polygonal and has an arc surface to prevent the rolling wheel from continuously rolling without generating friction, which would result in low speed limiting efficiency.

[0016] As can be seen from the above technical solution, the beneficial technical effects of the present invention are as follows: 1. By dividing the light-emitting plate into multiple first irradiation plates and multiple second irradiation plates, and enabling them to rotate and slide longitudinally, the irradiation area of ​​photodynamic therapy is effectively increased, and it can adapt to the irradiation needs of different patients or different disease sites. The positioning device (including a fixing block, a rotating shaft, and elastic elements) automatically fixes the angle of the first irradiation plate. After rotation adjustment, there is no need to manually lock it. The angle can be kept stable by the damping and resistance of the elastic elements, making the operation simple and safe. A speed limiting device is installed between the first and second irradiation plates. When adjusting the position of the second irradiation plate, it can limit its sliding speed and achieve automatic fixation after movement, avoiding accidental sliding caused by inertia or equipment tilt, thus improving the accuracy and safety of treatment.

[0017] 2. Each second irradiation plate can be independently and smoothly adjusted longitudinally by means of a speed limiting device (including a fixed rod, a second slide rod, a second spring, and a rolling wheel); this allows doctors to accurately supplement irradiation of areas beyond the coverage of the first irradiation plate, based on the irregular shape of the patient's diseased area. The roller design in the speed limiter provides sliding friction to limit the speed during normal adjustment, and can roll to reduce resistance when pushed quickly, balancing the operating feel and positioning stability; the polygonal wheel design with curved surface prevents speed limit failure caused by continuous rolling, while reducing component wear. The sliding rod structure supported by the second spring allows the second irradiation plate to automatically fix its position after being moved, without the need for additional locking steps. This simplifies the operation process and prevents the treatment effect from being affected or safety hazards from being caused by accidental movement of the device during treatment.

[0018] 3. By adding adjustment devices to the second irradiation plates located at both ends of the body, it is possible not only to slide longitudinally but also to move laterally, further expanding the irradiation coverage of the treatment and better adapting to lesion areas of various sizes and shapes; The adjustment device uses a clamping block to simultaneously clamp the first adjustment rod (controlling the longitudinal direction) and the second adjustment rod (controlling the lateral direction) under the action of a spring, achieving an automatic braking effect where the second irradiation plate stops as soon as it is released during lateral or longitudinal movement; no secondary manual fixing is required, improving adjustment efficiency and ease of operation; Multiple clamping blocks correspond to different adjusting rods and fit the rods in an arc shape, providing uniform and reliable clamping force; this ensures that the second irradiation plate will not slide due to gravity or vibration when stationary, guaranteeing the stability and accuracy of the irradiation position during treatment; The horizontal and vertical adjustment and restriction mechanisms are integrated into one adjustment device, which has a compact structure. Doctors can easily push and pull the second irradiation plate with one hand to make multi-directional fine adjustments and immediately obtain a stable position, simplifying the operation process of complex position adjustment. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the invention, the accompanying drawings used in the description of the specific embodiments or prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 Front view of an invention photodynamic therapy frame; Figure 2 Partial view of components such as the first irradiation plate in a photodynamic therapy frame for the invention; Figure 3 An enlarged schematic diagram of point A in a photodynamic therapy frame for invention; Figure 4 Partial view of components such as the first irradiation plate in a photodynamic therapy frame for the invention; Figure 5 Enlarged schematic diagram of points B and B1 in a photodynamic therapy frame for invention; Figure 6 A bottom view of a photodynamic therapy frame for invention; Figure 7 This is an enlarged schematic diagram of points C and C1 in a photodynamic therapy frame for invention.

[0021] Figure label: 1. Body; 2. Light-emitting plate; 21. First irradiation plate; 22. Second irradiation plate; 3. Positioning device; 31. Fixing block; 310. Groove; 32. Rotating shaft; 33. Connecting rod; 34. Elastic element; 341. First sliding rod; 342. First spring; 35. First sliding groove; 4. Speed ​​limiting device; 41. Fixing rod; 42. Third sliding groove; 43. Second sliding rod; 44. Second spring; 45. Rolling wheel; 5. Second sliding groove; 6. Adjustment device; 61. First adjusting rod; 62. Second adjusting rod; 63. Fixing block; 64. Third sliding rod; 65. Third spring; 66. Clamping block; 67. Fourth sliding groove. Detailed Implementation

[0022] The embodiments of the invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the invention and should not be construed as limiting the scope of protection of the invention. Example 1:

[0023] like Figure 1-3 As shown, this embodiment provides a photodynamic therapy frame, including: a body 1 and a light-emitting plate 2. One side of the light-emitting plate 2 is connected to the body 1. The body 1 can power the light-emitting plate 2 to drive the light-emitting plate 2 to rise and fall. The light-emitting plate 2 includes a first irradiation plate 21 and a second irradiation plate 22. Multiple first irradiation plates 21 are present to increase the irradiation area. A positioning device 3 connects adjacent first irradiation plates 21, hinges them together, and fixes the angle, allowing the first irradiation plates 21 to automatically fix themselves without manual intervention during rotation. Multiple second irradiation plates 22 are present and slide horizontally and longitudinally on the back of the first irradiation plates 21, allowing the first irradiation plates 21 to slide longitudinally beyond the area of ​​the second irradiation plates 22, thereby increasing the irradiation treatment area. The machine body 1 can control the activation and deactivation of the first irradiation plates 21 and the second irradiation plates 22. A speed limiting device 4 is slidably connected between the first irradiation plates 21 and the second irradiation plates 22 to limit the sliding distance of the second irradiation plate 22, preventing the second plate from continuing to slide after moving to a new position. Simultaneously, the speed limiting device 4 automatically fixes itself without requiring manual secondary fixing.

[0024] The positioning device 3 includes: a fixing block 31, a rotating shaft 32, an elastic element 34, and a connecting rod 33. Multiple fixing blocks 31 are arranged between adjacent first irradiation plates 21. The rotating shaft 32 has a first groove 35 radially formed at one end near the fixing block 31, and one end of the elastic element 34 is located within the first groove 35. The elastic element 34 limits the rotation angle of the rotating shaft 32. A groove 310 is formed on the side of the fixing block 31 near the rotating shaft 32, allowing the rotating shaft 32 to extend into it. The rotating shaft 32 is rotatably connected to the groove 310. One end of the elastic element 34 extends out of the first groove 35 and slides against the groove 310 to limit the angle, ensuring that the rotating shaft 32 does not rotate under normal conditions. When manually moved, the first irradiation plate 21 and the rotating shaft 32 rotate accordingly. The connecting rod 33 is located between two adjacent rotating shafts 32.

[0025] The elastic element 34 includes a first spring 342 and a sliding rod. One end of the first sliding rod 341 passes through and is slidably connected to the first sliding groove 35, and slides within the first sliding groove 35. The end of the sliding rod near the groove 310 is arc-shaped to reduce wear. The first spring 342 is located between the sliding rod and the first sliding groove 35, and the first spring 342 supports the sliding rod.

[0026] The working principle of Embodiment 1 is described in detail below: The body 1 positions the light-emitting plate 2 above the patient. The first irradiation plate 21 is rotated to adjust its angle to suit the affected area. When the first irradiation plate 21 is rotated, the first spring 342 drives the first slide rod 341 to abut against the groove 310, affecting the rotation speed of the rotating shaft 32. Without pushing the first irradiation plate 21, the first irradiation plate 21 will not rotate due to the influence of the first spring 342 and the first slide rod 341, thus fixing its angle. When an increased irradiation area is needed, no additional photodynamic therapy devices are required. The second irradiation plate 22 is slidable to adjust the irradiation area, and multiple second irradiation plates 22 can move freely longitudinally without needing to move uniformly, thus adapting to different irradiation needs.

[0027] The beneficial effects of the above scheme are as follows: by dividing the light-emitting plate 2 into multiple first irradiation plates 21 and multiple second irradiation plates 22, and enabling them to rotate and slide longitudinally respectively, the irradiation area of ​​photodynamic therapy is effectively increased, and it can adapt to the irradiation needs of different patients or different disease sites.

[0028] The positioning device 3 (including a fixing block 31, a rotating shaft 32, and an elastic element 34) automatically fixes the angle of the first irradiation plate 21. After rotation adjustment, manual locking is not required; the angle remains stable due to the damping and resisting action of the elastic element 34, making operation simple and safe.

[0029] A speed limiting device 4 is provided between the first irradiation plate 21 and the second irradiation plate 22. When adjusting the position of the second irradiation plate 22, it can limit its sliding speed and achieve automatic fixation after movement, avoiding accidental sliding caused by inertia or equipment tilt, and improving the accuracy and safety of treatment. Example 2:

[0030] like Figures 1-7 As shown, a second sliding groove 5 is connected to the outer side of the second irradiation plate 22. The speed limiting device 4 includes a fixed rod 41, a second sliding rod 43, and a second spring 44. One end of the fixed rod 41 is slidably connected to the second sliding groove 5, and the other end of the fixed rod 41 is slidably connected to the back of the first irradiation plate 21, so that the fixed rod 41 supports the second irradiation plate 22 while allowing the second irradiation plate 22 to slide. A third sliding groove 42 is formed at the end of the fixed rod 41 that extends into the second sliding groove 5. One end of the second sliding rod 43 extends into the third sliding groove 42 and is slidably connected thereto, allowing the second sliding rod 43 to slide within the third sliding groove 42. One end of the second spring 44 abuts against the outer side of the second sliding rod 43, and the other end of the second spring 44 abuts against the third sliding groove 42, with the second spring 44 supporting the second sliding rod 43. One end of the second sliding rod 43 is slidably connected to the second sliding groove 5.

[0031] A rolling wheel 45 is rotatably connected to one end of the second slide bar 43 near the second slide groove 5. The rolling wheel 45 rolls on the inner wall of the second slide groove 5 to reduce wear. The outer side of the rolling wheel 45 is polygonal and has an arc surface to prevent the rolling wheel 45 from continuously rolling without generating friction, which would result in low speed limiting efficiency.

[0032] The working principle of Embodiment 2 is explained in detail below: The second spring 44 drives the second slide rod 43 and roller to abut against the second slide groove 5, so that when the fixed rod 41 moves within the second slide groove 5, the speed of the second irradiation plate 22 decreases to prevent the second irradiation plate 22 from being difficult to adjust the distance. When the second irradiation plate 22 moves, the fixed rod 41 and roller and other components move accordingly, and the outer arc surface of the roller slides with the second slide groove 5. When pushed too hard, the roller will roll and reduce friction due to excessive speed. Each second irradiation plate 22 can move independently to adapt to individual irradiation of different parts of the patient. Because the area to be irradiated by the patient is not a regular shape, it is necessary to adjust the distance of the second irradiation plate 22 to irradiate the irregular area of ​​the diseased area that exceeds the first irradiation plate 21 while the first irradiation plate 21 irradiates the large area of ​​the diseased area.

[0033] The beneficial effects of the above scheme are as follows: the speed limiting device 4 (including a fixed rod 41, a second sliding rod 43, a second spring 44, and a rolling wheel 45) allows each second irradiation plate 22 to be independently and smoothly adjusted longitudinally. This allows doctors to provide precise supplementary irradiation to areas beyond the coverage of the first irradiation plate 21, taking into account the irregular shape of the patient's affected area.

[0034] The roller 45 in the speed limiting device 4 provides sliding friction to limit speed during normal adjustment, and can roll to reduce resistance during rapid pushing, balancing the operating feel and positioning stability. The polygonal wheel design with curved surfaces prevents speed limiting failure caused by continuous rolling, while also reducing component wear.

[0035] The sliding rod structure supported by the second spring 44 allows the second irradiation plate 22 to automatically lock in position after movement, eliminating the need for additional locking steps. This simplifies the operation process and prevents the treatment effect from being affected or safety hazards from accidental movement of the device during treatment. Example 3:

[0036] like Figures 1-6As shown, the back of the second irradiation plate 22 located at both ends of the machine body 1 is connected to an adjustment device 6, so that the second irradiation plate 22 can be stopped at any time during lateral or longitudinal movement without secondary fixing, facilitating operation. The first irradiation plate 21 is laterally slidably connected to a first adjustment rod 61 and passes through the adjustment device 6, so that the adjustment device 6 limits the sliding speed of the first adjustment rod 61. The first irradiation plate 21 is longitudinally slidably connected to a second adjustment rod 62 and passes through the adjustment device 6, thereby limiting the longitudinal movement speed of the second irradiation plate 22. The adjustment device 6 limits the sliding distance between the first adjustment rod 61 and the second adjustment rod 62.

[0037] The adjusting device 6 includes a stabilizing block 63, a third sliding rod 64, a third spring 65, and a clamping block 66. The stabilizing block 63 is fixedly connected to the back of the second irradiation plate 22. One end of the first adjusting rod 61 and the second adjusting rod 62 passes through the stabilizing block 63 and is slidably connected to it. A fourth sliding groove 67 is formed in the stabilizing block 63, and the clamping block 66 is slidably connected to the fourth sliding groove 67, sliding to abut the adjusting rod. One end of the third sliding rod 64 passes through the fourth sliding groove 67 and is fixedly connected to the clamping block 66. The third spring 65 is located between the fourth sliding groove 67 and the clamping block 66 to support the clamping block 66, causing the clamping block 66 to abut the adjusting rod and preventing the second irradiation plate 22 from sliding under normal conditions.

[0038] The fourth sliding groove 67 and the clamping block 66 have multiple corresponding clamping mechanisms for the first adjusting rod 61 and the second adjusting rod 62. The clamping block 66 is arc-shaped to conform to the shape of the adjusting rod. The second adjusting rod 62 is longer than the first adjusting rod 61, so that when the second irradiation plate 22 moves longitudinally, it can exceed the area of ​​the first irradiation plate 21.

[0039] The working principle of Embodiment 3 is explained in detail below: When it is necessary to increase the lateral irradiation area, the second irradiation plate 22 located at both ends is slid to increase the lateral irradiation area. The second irradiation plate 22 at both ends can also move longitudinally to increase the irradiation area, thus adapting to the needs of different diseased sites. When the second irradiation plate 22 moves longitudinally, the clamping block 66 affects the clamping of the first adjusting rod 61 and the stabilizing block 63, thereby reducing the sliding speed. The second irradiation plate 22 will not move when not pushed. At this time, the second adjusting rod 62 moves along with the stabilizing block 63. When the second irradiation plate 22 moves laterally, the clamping block 66 clamps the second adjusting rod 62, causing the second irradiation plate 22 to stop and cease sliding when no further pushing occurs, preventing the second irradiation plate 22 from sliding under normal conditions. This also eliminates the need for fixing the second irradiation plate 22, allowing it to stop automatically. Simultaneously, the stabilizing block 63 drives the first adjusting rod 61 to move accordingly.

[0040] The beneficial effects of the above scheme are as follows: by adding adjustment devices 6 to the second irradiation plates 22 located at both ends of the body 1, it can not only slide longitudinally, but also move laterally, which further expands the irradiation coverage of the treatment and can better adapt to lesion areas of various sizes and shapes.

[0041] The adjusting device 6, through the clamping block 66, simultaneously clamps the first adjusting rod 61 (controlling the longitudinal direction) and the second adjusting rod 62 (controlling the lateral direction) under the action of the spring, achieving an automatic braking effect where the second irradiation plate 22 stops as soon as it is released during lateral or longitudinal movement. This eliminates the need for secondary manual fixing, greatly improving adjustment efficiency and operational convenience.

[0042] Multiple clamping blocks 66 correspond to different adjusting rods and fit the rods in an arc shape, providing uniform and reliable clamping force. This ensures that the second irradiation plate 22 will not slide due to gravity or vibration when stationary, guaranteeing the stability and accuracy of the irradiation position during treatment.

[0043] The lateral and longitudinal adjustment and restraint mechanisms are integrated into an adjustment device 6, resulting in a compact structure. Doctors can easily perform multi-directional fine-tuning of the second irradiation plate 22 with one hand and immediately achieve stable positioning, simplifying the operation process for complex position adjustments.

[0044] The above embodiments are only used to illustrate the technical solutions of the invention, and are not intended to limit it. Although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the invention, and they should all be covered within the scope of the claims and specification of the invention.

Claims

1. A photodynamic therapy frame, characterized in that, include: The body (1) and the light-emitting plate (2) are connected to the body (1) on one side; The light-emitting plate (2) includes a first irradiation plate (21) and a second irradiation plate (22). There are multiple first irradiation plates (21) arranged in a linear sequence. A positioning device (3) is connected between adjacent first irradiation plates (21) so that the angle between the first irradiation plates (21) can be adjusted and locked. There are multiple second irradiation plates (22) and they are horizontally and longitudinally slidably connected to the side of the first irradiation plate (21) away from the light-emitting side. A speed limiting device (4) is slidably connected between the first irradiation plate (21) and the second irradiation plate (22) to limit the sliding distance of the second irradiation plate (22).

2. The photodynamic therapy frame according to claim 1, characterized in that, The positioning device (3) includes: a fixed block (31), a rotating shaft (32), an elastic element (34), and a connecting rod (33). The fixed block (31) and the rotating shaft (32) are respectively arranged between two adjacent first irradiation plates (21). The rotating shaft (32) has a first groove (35) radially opened at one end near the fixed block (31), and one end of the elastic element (34) is located in the first groove (35). The fixed block (31) has a groove (310) on one side near the rotating shaft (32) so that the rotating shaft (32) can be inserted therein. One end of the elastic element (34) extends out of the first groove (35) and slides against the groove (310) to limit the angle. The connecting rod (33) is located between two adjacent rotating shafts (32).

3. The photodynamic therapy frame according to claim 2, characterized in that, The elastic element (34) includes a first spring (342) and a first slide rod (341). One end of the first slide rod (341) is inserted into the first slide groove (35) and slidably connected thereto. The end of the slide rod near the groove (310) is arc-shaped. The first spring (342) is located between the slide rod and the first slide groove (35).

4. The photodynamic therapy frame according to claim 1, characterized in that, The second irradiation plate (22) is connected to a second slide groove (5) on the outside. The speed limiting device (4) includes a fixed rod (41), a second slide rod (43) and a second spring (44). One end of the fixed rod (41) is slidably connected to the second slide groove (5), and the other end of the fixed rod (41) is slidably connected to the back of the first irradiation plate (21). A third slide groove (42) is opened at one end of the fixed rod (41) that extends into the second slide groove (5). One end of the second slide rod (43) extends into the third slide groove (42) and is slidably connected thereto. One end of the second spring (44) abuts against the outside of the second slide rod (43), and the other end of the second spring (44) abuts against the third slide groove (42). One end of the second slide rod (43) is slidably connected to the second slide groove (5).

5. A photodynamic therapy frame according to claim 2, characterized in that, An adjustment device (6) is connected to the back of the second irradiation plate (22) located at both ends of the body (1). The first irradiation plate (21) is slidably connected to the first adjustment rod (61) and passes through the adjustment device (6). The first irradiation plate (21) is slidably connected to the second adjustment rod (62) and passes through the adjustment device (6). The adjustment device (6) limits the sliding distance between the first adjustment rod (61) and the second adjustment rod.

6. A photodynamic therapy frame according to claim 5, characterized in that, The adjustment device (6) includes: a stabilizing block (63), a third sliding rod (64), a third spring (65), and a clamping block (66). The fixing block (31) is fixedly connected to the back of the second irradiation plate (22). One end of the first adjusting rod (61) and the second adjusting rod (62) passes through the fixing block (31) and is slidably connected to the fixing block (31). A fourth sliding groove (67) is provided in the fixing block (31). The clamping block (66) is slidably connected to the fourth sliding groove (67). One end of the third sliding rod (64) passes through the fourth sliding groove (67) and is fixedly connected to the clamping block (66). The third spring (65) is located between the fourth sliding groove (67) and the clamping block (66) to support the clamping block (66). The fourth sliding groove (67) and the clamping block (66) have multiple clamping positions corresponding to the first adjusting rod (61) and the second adjusting rod (62).

7. A photodynamic therapy frame according to claim 6, characterized in that, The clamping block (66) is arc-shaped to fit the shape of the adjusting rod.

8. A photodynamic therapy frame according to claim 5, characterized in that, The second adjusting rod (62) is longer than the first adjusting rod (61), so that when the second irradiation plate (22) moves longitudinally, it can exceed the area of ​​the first irradiation plate (21).

9. A photodynamic therapy frame according to claim 4, characterized in that, The second slide bar (43) is rotatably connected to a roller (45) at one end near the second slide groove (5). The roller (45) rolls on the inner wall of the second slide groove (5) to reduce wear.

10. A photodynamic therapy frame according to claim 9, characterized in that, The outer side of the rolling wheel (45) is polygonal and has an arc surface to prevent the rolling wheel (45) from rolling continuously without generating friction, which would result in low speed limiting efficiency.

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