Source shut-off device and radiotherapy apparatus

Abstract

The present disclosure relates to a source-off device and a radiotherapy device. The source-off device is applied to the radiotherapy device, the radiotherapy device comprising a fixed gantry, a treatment head, and a switch source driving mechanism arranged on the treatment head, the source-off device being arranged on the fixed gantry, and the source-off device comprising: a movable coupling member configured to be moved relative to the fixed gantry in response to a manual operation on the movable coupling member to engage with the switch source driving mechanism to establish a torque transmission path; and a reset member configured to reset the movable coupling member to a position separated from the switch source driving mechanism after the manual operation is ended. Thus, safe, fast and reliable manual source-off can be achieved.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and particularly to source devices and radiotherapy equipment. Background Technology

[0002] Radiotherapy (RT) is one of the main methods for treating malignant tumors. Precise control of the radiation source is crucial during the operation of radiotherapy equipment. Radiotherapy equipment is typically equipped with an electronic control system to automatically shut off the radiation source when radiotherapy ends or in case of abnormalities.

[0003] However, in certain extreme and abnormal situations, such as a complete power outage, a malfunction of the electronic control system, or the failure of critical electronic components, the source shutdown procedure may not be performed as expected. In such cases, if the radiation source is not shut off in time, it will cause continuous and unintended radiation exposure to the patient and the surrounding environment.

[0004] To address this, related technologies include manual power-off devices. However, the manual operation interface of these devices requires operators to enter the radiation treatment room where radiation is present, posing a potential radiation exposure risk to the operators.

[0005] Therefore, there is an urgent need for a technical solution that can achieve rapid and reliable manual power-off while ensuring the safety of operators. Utility Model Content

[0006] This section provides a general overview of this disclosure, rather than a full disclosure of the entire scope or all features of this disclosure.

[0007] According to embodiments of this disclosure, a source-switching device is provided. This source-switching device is applied to a radiotherapy apparatus, which includes a gantry, a treatment head, and a source-switching drive mechanism disposed on the treatment head. The source-switching device is disposed on the gantry and includes a movable coupling member and a reset member. The movable coupling member is configured to move relative to the gantry in response to manual operation of the movable coupling member to engage with the source-switching drive mechanism to establish a torque transmission path. The reset member is configured to reset the movable coupling member to a position disengaged from the source-switching drive mechanism after the manual operation is completed.

[0008] According to embodiments of this disclosure, a radiotherapy device is also provided, including a fixed gantry, a rotating gantry, a treatment head disposed on the rotating gantry, a switching source drive mechanism disposed on the treatment head, and a switching source device as described above disposed on the fixed gantry, wherein the fixed gantry is a radiation shield.

[0009] The technical solution provided by the embodiments of this disclosure allows for remote, safe, and rapid manual shutdown of the radiotherapy equipment in the event of extreme abnormalities such as power outages. Operators can manually operate a movable coupling component outside the fixed frame to move it, thereby engaging with the switching power supply drive mechanism of the treatment head and establishing a purely mechanical torque transmission path. This enables remote, risk-free manual power shutdown. Furthermore, after the operation is completed, a reset component automatically resets the movable coupling component. Thus, the engagement, torque transmission, and disengagement / reset processes are all achieved entirely through mechanical force, without relying on electricity, resulting in high reliability and safety. Attached Figure Description

[0010] The features and advantages of embodiments of the present disclosure will become more readily understood from the following description with reference to the accompanying drawings. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components. In the drawings: Figure 1 This is a front view of a radiotherapy device according to an embodiment of the present disclosure.

[0011] Figure 2 for Figure 1 A side view of a radiotherapy device.

[0012] Figure 3 for Figure 1 A partial cross-sectional view of a radiotherapy device.

[0013] Figure 4 This is a cross-sectional view of the power supply device according to an embodiment of the present disclosure in its first state.

[0014] Figure 5 for Figure 4 A cross-sectional view of the source device in the second state.

[0015] In the accompanying drawings, the same or corresponding technical features or components are represented by the same or corresponding reference numerals. Detailed Implementation

[0016] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments. It should be noted that the following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the scope of the disclosure.

[0017] It should be noted that, for clarity, not all features of a particular embodiment are described or shown in the specification and drawings. Furthermore, to avoid unnecessary details obscuring the technical solutions of interest in this disclosure, only the device structure closely related to the technical solutions of this disclosure is described and shown in the specification and drawings, while other details that are not closely related to the technical content of this disclosure and are known to those skilled in the art are omitted.

[0018] Reference Figures 1 to 5 According to embodiments of the present disclosure, a radiotherapy device 200 and a radiotherapy device 100 including the radiotherapy device 200 are provided.

[0019] The following reference Figures 1 to 3 The radiotherapy device 100 disclosed herein will be described in detail.

[0020] The radiotherapy device 100 may be a gamma ray therapy device, a linear accelerator, a proton therapy device, or any other medical device that includes a radiation source and requires source-off operation.

[0021] The radiotherapy equipment 100 includes a fixed gantry 120, a rotating gantry 140, a treatment head 160, a power source drive mechanism 180, and a power source off device 200.

[0022] The fixed frame 120 is the load-bearing and support structure of the entire radiotherapy equipment 100. It is usually made of high-strength metal materials (such as steel) to ensure the stability of the radiotherapy equipment 100.

[0023] Understandably, to protect operators and the environment from stray radiation, the fixed rack 120 may be designed as a radiation shield, for example. The radiation shield may be made of lead or other high-density materials to attenuate stray doses in the operating area of ​​the radiotherapy equipment 100 in an open state to below a safe level.

[0024] The rotating frame 140 is rotatably mounted on the fixed frame 120. For example, the rotating frame 140 can be mounted on the fixed frame 120 via bearings. Exemplarily, the rotating frame 140 is... Figure 1 The middle part is shown as a roller.

[0025] The treatment head 160 is mounted on the rotating gantry 140. The treatment head 160 internally houses a source assembly and a collimation assembly. The source assembly contains a radiation source, which is the component that generates radiation rays (e.g., high-energy X-rays). The collimation assembly is used to conform the beam emitted from the radiation source of the source assembly to the shape of the target area of ​​the object, avoiding radiation damage to healthy tissue surrounding the target area. Figure 1 and Figure 2 As shown, when the rotating gantry 140 is driven to rotate, for example by the rotating drive unit 110, the treatment head 160 rotates synchronously with the rotating gantry 140, so as to irradiate the target area from multiple angles.

[0026] like Figure 3As shown, a switching source drive mechanism 180 is disposed on the treatment head 160. The switching source drive mechanism 180 is an actuator used to control the source assembly or collimation assembly within the treatment head 160 to achieve the opening or closing of the beam S (i.e., switching the source). For example, the switching source drive mechanism 180 may include a mechanical linkage mechanism, a cam mechanism, or a gear train, etc., to drive the source assembly to move relative to the collimation assembly. When the rays emitted by the radiation source in the source assembly are blocked by the collimation assembly, the source is closed; when the rays emitted by the radiation source in the source assembly can pass through the collimation aperture of the collimation assembly, the source is opened. Alternatively, the switching source drive mechanism 180 is used to drive the collimation assembly to move or open or close the collimation aperture, so that the rays emitted by the source assembly pass through the collimation aperture or are blocked, thereby achieving the switching of the source. The switching source drive mechanism 180 may be provided with a mechanical interface thereon. Figure 3 The example shown is a manual switch source input shaft 182, used to receive external mechanical torque in extreme abnormal conditions to achieve manual power off.

[0027] The power supply device 200 is mounted on the fixed frame 120 and does not rotate with the rotating frame 140. (See below for reference.) Figure 4 and Figure 5 and combined Figures 1 to 3 The source-removing device 200 is described in detail.

[0028] Figure 4 The manual switching input shaft 182 of the switching device 200 and the switching drive mechanism 180 is schematically shown in cross-sectional view. Figure 4 (The image shown is in a dashed line) indicates a situation where the parts are separated; while Figure 5 The manual switching input shaft 182 of the switching device 200 and the switching drive mechanism 180 is schematically shown in cross-sectional view. Figure 5 (The same dashed line indicates the situation where they are in the joined state.)

[0029] The power-off device 200 includes a movable coupling member 240 and a reset member 260.

[0030] The movable coupling member 240 is capable of moving relative to the fixed frame 120 in response to manual operation of the movable coupling member 240 to engage with the switching source drive mechanism 180, thereby establishing a torque transmission path. Specifically, as Figure 1 As shown, a fixed frame 120 surrounds a rotating frame 140, and a power supply device 200 is mounted outside the fixed frame 120. A movable coupling member 240 is movable relative to the fixed frame 120, for example, it can move radially along the fixed frame 120 to engage with the manual power supply input shaft 182 of the power supply drive mechanism 180, thereby establishing a torque transmission path.

[0031] Understandably, "manual operation" here typically includes two steps: first, applying a thrust, for example, in the radial direction along the fixed frame 120, to the movable coupling member 240, causing it to move closer to the position of the switching source drive mechanism 180; then, after the movable coupling member 240 engages with the manual switching source input shaft 182, applying torque to the movable coupling member 240 to perform the power-off action. "Engagement" refers to an interlocking connection capable of reliably transmitting force to ensure the effectiveness of torque transmission during power-off.

[0032] The reset member 260 is capable of automatically resetting the movable coupling member 240 to a position separated from the manual switching source input shaft 182 and thus from the switching source drive mechanism 180 after manual operation is completed (i.e., after the manual force applied to the movable coupling member 240 is removed). This automatic reset allows the source-off device 200 to automatically return to its normal state of complete separation from the switching source drive mechanism 180 (i.e., from the treatment head 160 and the rotating gantry 140) after the source is turned off, avoiding any interference with the normal operation of the radiotherapy equipment 100.

[0033] The working state of the power supply device 200 will be described below by way of example.

[0034] In a separated state (e.g.) Figure 4 (As shown), for example, when the radiotherapy device 100 is operating normally or in standby mode, the operator does not perform any manual operation. At this time, the reset member 260 applies a reset force (e.g., Figure 4 A biasing force (pointing outward from the fixed frame 120) pushes the movable coupling member 240 to a position separated from the switch source drive mechanism 180 and holds it in that position. In this position, a gap exists in the radial direction of the fixed frame 120 between the end of the movable coupling member 240 and the manual switch source input shaft 182 of the switch source drive mechanism 180. The rotating frame 140 can rotate freely with the switch source drive mechanism 180, and the movable coupling member 240 and the switch source drive mechanism 180 do not interfere with each other.

[0035] When an emergency manual shutdown is required (e.g., after a power outage or failure of the automatic shutdown mechanism), the operator must first align the manual power input shaft 182 of the power switch drive mechanism 180 on the rotating frame 140 with the movable coupling member 240 mounted on the fixed frame 120 in the radial direction of the fixed frame 120 (e.g., ...). Figure 3(As shown). At this time, the operator is located in a safe area outside the fixed frame 120 and applies a manual operation (e.g., a thrust) in the radial direction of the fixed frame 120 to the exposed end 2422 of the movable coupling member 240 outside the fixed frame 120. This thrust overcomes the reset force of the reset member 260, causing the movable coupling member 240 to move inward in the radial direction of the fixed frame 120 and eventually engage with the aligned manual switch source input shaft 182. That is, the power-off device 200 is now in the engaged state (e.g., Figure 5 (As shown).

[0036] Once engaged, a purely mechanical torque transmission path can be established between the movable coupling member 240 and the switching source drive mechanism 180. At this point, the operator can transmit torque to the switching source drive mechanism 180 by rotating the movable coupling member 240, driving it to operate until the power is turned off.

[0037] After the power-off operation is completed, the operator removes the thrust applied to the movable coupling member 240. Upon removal of the manual force, the energy stored in the reset member 260 is immediately released, automatically pushing the movable coupling member 240 back to its original position. Figure 4 The position shown is where the device is separated from the switching power source drive mechanism 180. The torque transmission path is thus broken, the switching device 200 is disengaged from the switching power source drive mechanism 180, and the rotating frame 140 can rotate freely again.

[0038] In this way, when the radiotherapy equipment 100 experiences extreme abnormalities such as power failure, the operator can manually operate the movable coupling member 240 from outside the fixed frame 120 to move the movable coupling member 240 and engage it with the switching power source drive mechanism 180, thereby establishing a purely mechanical torque transmission path to achieve remote, risk-free, and rapid manual power-off. Furthermore, after the operation is completed, the reset member 260 can automatically reset the movable coupling member 240. Thus, the above-mentioned engagement, torque transmission, and disengagement / reset processes can be achieved entirely based on mechanical force, without relying on electricity, resulting in high reliability and safety.

[0039] It is conceivable that, for example Figure 4 and Figure 5 As shown, the power supply device 200 may further include a fixing component 220. The fixing component 220 is fixed to the fixing frame 120. Figure 4 and Figure 5 (All are shown schematically in dashed lines). The movable coupling member 240 slides through the fixed component 220 and can engage with the switch source drive mechanism 180 through the fixed component 220.

[0040] For example, the fixing component 220 can be securely mounted on the outer wall of the fixed frame 120 by means of bolts or other methods. This provides a stable mounting reference for other components of the power-off device 200. In traditional manual power-off devices, at least part of the structure needs to be fixed to the treatment head 160, which undoubtedly increases the weight of the treatment head 160 and makes it more difficult for the drive mechanism to move the treatment head 160. However, in this solution, the power-off device 200 is fixed to the fixed frame 120, avoiding adding weight to the treatment head 160 and reducing the requirements for the device's drive mechanism.

[0041] It is conceivable that, for example Figure 4 and Figure 5 As shown, the reset member 260 can be a conventional component in the art that deforms / compresses under force and recovers upon loss of force, and can be an elastic element (e.g., a compression spring) or a cylinder. Specifically, the elastic element or cylinder can be configured to be compressed and recovered in response to force changes in manual operation of the movable coupling member 240, thereby moving the movable coupling member 240 closer to or further away from the setting position of the switching source drive mechanism, thereby establishing or disconnecting the torque transmission path.

[0042] However, the reset member 260 is not limited to this implementation. Exemplarily, the reset member 260 may also be a mechanism biased by magnetic force. This disclosure is not intended to limit the scope.

[0043] It is conceivable that, for example Figure 4 and Figure 5 As shown, the movable coupling member 240 may include an operating shaft 242 and a sleeve 244.

[0044] The operating shaft 242 is the main body of the movable coupling member 240, and its exposed end 2422 outside the fixed frame 120 is used to receive manual operations by the operator, such as thrust and torque.

[0045] Sleeve 244 can be detachably connected to end 2424 of operating shaft 242 (i.e., the end facing the switch source drive mechanism 180) for engagement with switch source drive mechanism 180 (specifically, with manual switch source input shaft 182 of switch source drive mechanism 180).

[0046] This detachable design provides excellent flexibility and maintainability. On the one hand, if the inner bore 2442 of the sleeve 244, which mates with the manual switch source input shaft 182, wears, only the sleeve 244 can be replaced without replacing the entire movable coupling member 240. On the other hand, by replacing the sleeve 244 with one of different inner bore shapes or sizes, the source-closing device 200 can be easily adapted to radiotherapy equipment with manual switch source input shafts 182 of different specifications (e.g., different diameters or shapes), improving the versatility of the components.

[0047] For example, the sleeve 244 may be hinged to the end 2424 of the operating shaft 242.

[0048] The hinge can compensate for minor alignment errors that may exist between the operating shaft 242 and the manual switch input shaft 182 to some extent. This improves the success rate and reliability of engagement.

[0049] It is also conceivable that the sleeve 244 could be integrally formed with the operating shaft 242, for example, by casting or machining.

[0050] It is understandable that, in order to achieve smooth sliding of the movable coupling member 240 relative to the fixed frame 120, for example, along its radial direction, and to effectively cooperate with the reset member 260, as... Figure 4 and Figure 5 As shown, the power supply device 200 may also include a first sliding sleeve 280.

[0051] The first sliding sleeve 280 is sleeved on the movable coupling member 240 (specifically, on its operating shaft 242) and can move synchronously with the movable coupling member 240. For example, the first sliding sleeve 280 can be sleeved on the movable coupling member 240 via a bearing 282, so that the movable coupling member 240 can move synchronously with the first sliding sleeve 280 along the radial direction of the fixed frame 120, and can also rotate relative to the first sliding sleeve 280.

[0052] For example, the first sliding sleeve 280 is slidable radially relative to the fixing component 220 along the fixing frame 120. For instance, the outer diameter of the first sliding sleeve 280 can be precisely fitted with the inner hole of the fixing component 220.

[0053] Furthermore, the first sliding sleeve 280 can also be connected to the reset member 260. For example, as Figure 4 and Figure 5 As shown, the reset member 260 can be disposed between the first sliding sleeve 280 and the fixing component 220, wherein one end of the reset member 260 is connected to the first sliding sleeve 280 and the other end is connected to the fixing component 220.

[0054] When the operator applies a thrust, the thrust is transmitted to the first sliding sleeve 280 through the movable coupling member 240, causing the first sliding sleeve 280 to slide inward relative to the fixing assembly 220 in the radial direction of the fixing frame 120 and compress the reset member. Figure 4 and Figure 5 The compression spring shown in the example) 260 (as shown in the example) Figure 5(As shown). When the thrust disappears, the compressed reset member 260 pushes the first sliding sleeve 280, which in turn drives the movable coupling member 240 to reset in the opposite direction (as shown). Figure 4 (As shown).

[0055] It is conceivable that in other embodiments, the power-off device 200 may also include a second sliding sleeve, which is sleeved on the movable coupling member 240 and connected to the reset member 260, and the movable coupling member 240 is slidable relative to the second sliding sleeve.

[0056] For example, it is conceivable that the fixing component 220 takes the form of a sliding sleeve as a second sliding sleeve. In this case, the movable coupling member 240 can move and rotate relative to the second sliding sleeve in the radial direction of the fixing frame 120.

[0057] Exemplarily, a reset member 260 may be disposed between the second sliding sleeve and the movable coupling member 240, wherein one end of the reset member 260 is connected to the second sliding sleeve, and the other end is connected to the movable coupling member 240. Thus, when an operator applies a thrust, the thrust causes the movable coupling member 240 to slide inward relative to the second sliding sleeve along the radial direction of the fixed frame 120 and compress the reset member 260. When the thrust disappears, the compressed reset member 260 pushes the movable coupling member 240 to reset in the opposite direction.

[0058] It is also conceivable that a first sliding sleeve 280 and a second sliding sleeve can be provided simultaneously. The second sliding sleeve can be fitted onto the first sliding sleeve 280 and connected to the reset member 260, and the movable coupling member 260 can slide relative to the second sliding sleeve. For example, in this case, the reset member 260 can be disposed between the first sliding sleeve 280 and the second sliding sleeve, wherein one end of the reset member 260 is connected to the first sliding sleeve 280 and the other end is connected to the second sliding sleeve.

[0059] In order to reduce friction on the sliding mating surfaces and prevent wear and jamming, it is conceivable that the power supply device 200 may also include a third sliding sleeve 250 for reducing the sliding friction on the outer surface of the movable coupling member 240 or the first sliding sleeve 280.

[0060] like Figure 4 and Figure 5As shown, the third sliding sleeve 250 can be disposed outside the first sliding sleeve 280. For example, the third sliding sleeve 250 can be located between the sliding mating surfaces of the first sliding sleeve 280 and the fixing component 220; or the third sliding sleeve 250 can be located between the sliding mating surfaces of the first sliding sleeve 280 and the second sliding sleeve. This effectively reduces the frictional force on the sliding mating surfaces. It is also conceivable that the third sliding sleeve 250 can be disposed inside the second sliding sleeve. For example, the third sliding sleeve 250 can be located between the sliding mating surfaces of the movable coupling member 240 and the second sliding sleeve. This effectively reduces the frictional force on the sliding mating surfaces. Exemplarily, the third sliding sleeve 250 can be made of a material with a low coefficient of friction, such as polytetrafluoroethylene (PTFE).

[0061] The source-shutting device 200 is a manually operated emergency device that may only be used a few times during the entire lifespan of the radiotherapy equipment 100, or remain stationary for extended periods. Therefore, the movement of the movable coupling member 240 may become stuck in an emergency. The third sliding sleeve 250 maintains a low coefficient of friction over a long period, ensuring that the source-shutting device 200 can be smoothly pushed in an emergency, thereby improving its reliability and maintenance-free operation.

[0062] It is conceivable that, for example Figure 4 and Figure 5 As shown, the power supply device 200 may also include a guide structure 210 for guiding the movement of the movable coupling member 240.

[0063] For example, such as Figure 4 and Figure 5 As shown, the guide structure 210 may include at least one guide shaft arranged parallel to the central axis of the movable coupling member 240 (e.g., the radial direction of the fixed frame 120). One end of the guide shaft may be fixed to the fixing assembly 220, and the other end may pass through a guide hole provided on the first sliding sleeve 280. Furthermore, the guide structure 210 may take any other suitable form, without limitation.

[0064] In this way, the movable coupling member 240 can move along a predetermined path (e.g., a straight path), avoiding tilting and jamming during movement. Especially when the spring-loaded return member 260 is compressed, it may tend to bend or deflect. The presence of the guide structure 210 provides additional radial support and guidance for the movable coupling member 240, resisting any unbalanced forces that the spring may generate, thus ensuring that the movable coupling member 240 always moves in a straight line. This ensures that the movable coupling member 240 can smoothly and accurately align and engage with the manual switch input shaft 182, thereby further improving the reliability and accuracy of manual power-off operations.

[0065] It is conceivable that, for example Figure 4 and Figure 5 As shown, the power supply device 200 may further include a limiting mechanism 230, which limits the movement position of the movable coupling member 240. For example, as... Figure 4 and Figure 5 As shown, the limiting mechanism 230 may be one or more limiting screws. The limiting screws may define the start and end points of movement of the first sliding sleeve 280 and thus the movable coupling member 240 by engaging with a specific structure (e.g., a groove or a boss) on the first sliding sleeve 280 through their head or shank.

[0066] In this way, the reset stroke of the movable coupling member 240 can be precisely controlled, preventing the movable coupling member 240 from exceeding its designed stroke during movement and potentially causing damage to the movable coupling member 240 itself or the reset member 260.

[0067] It is conceivable that the end 2422 of the movable coupling member 240 (specifically, for example, the operating shaft 242) for receiving manual operation can be used with standardized manual tools.

[0068] For example, the end portion 2422 can be machined into a standard square, hexagonal, or other standard shape. Thus, an operator can use a standardized hand tool, such as a socket wrench, to engage with the end portion 2422 of the movable coupling member 240 to manually operate the movable coupling member 240.

[0069] In this way, operators can more easily apply sufficient axial thrust and provide strong rotational torque after engagement.

[0070] As mentioned earlier, when performing manual power off, the rotating gantry 140 must first be rotated to a specific alignment position so that the movable coupling member 240 is aligned with the manual power off input shaft 182. However, in the event that the radiotherapy equipment 100 is completely de-energized, the power source driving the rotation of the rotating gantry 140 will also fail.

[0071] In this regard, it is conceivable that, for example Figure 1 As shown, the radiotherapy device 100 may also include a manual drive device 130 for manually driving the rotating gantry 140 to rotate.

[0072] For example, the manual drive unit 130 can be connected to the rotary drive unit 110, and the manual operation portion of the manual drive unit 130 extends to the outside of the fixed gantry 120. When the radiotherapy equipment 100 is powered off, the operator can drive the rotary drive unit 110 from a safe area outside the fixed gantry 120 by operating the manual operation portion of the manual drive unit 130, thereby driving the rotary gantry 140 to rotate.

[0073] Other implementations of the manual drive device 130 are also conceivable. For example, the manual drive device 130 may be a mechanical transmission mechanism independent of the rotary drive unit 110, which directly drives the rotary frame 140 to rotate. This disclosure does not limit this.

[0074] In addition, in order to enable operators to accurately determine when a manual power-off operation can be performed, it is conceivable that the rotating frame 140 may be provided with alignment indicators to indicate that the power-off drive mechanism 180 and the movable coupling member 240 are in an aligned position that can engage.

[0075] For example, the alignment indicator mark can be a scribed line, arrow, or the like, provided on the surface of the rotating frame 140. Correspondingly, an alignment part (e.g., a fixed scribed line or arrow) can be provided on the fixed frame 120 or the power supply device 200. When the operator rotates the rotating frame 140 until the alignment indicator mark aligns with the alignment part, it indicates that the internal power supply drive mechanism 180 and the movable coupling member 240 are in an aligned position that can engage precisely.

[0076] The following is a complete description of the operation procedure for manually shutting off the power using the power-off device 200, by way of example.

[0077] When the radiotherapy equipment 100 encounters an extreme abnormality during radiotherapy (such as a power outage), the operator operates the manual drive device 130 from a safe area outside the fixed gantry 120 to rotate the rotating gantry 140 until the alignment indicator on the rotating gantry 140 aligns with the alignment part on the fixed gantry 120. At this time, the operator uses a standardized manual tool to press the movable coupling member 240 axially along its end 2422. This pressing action compresses the reset member 260 and engages the sleeve 244 of the movable coupling member 240 with the manual switching input shaft 182 of the switching source drive mechanism 180 to establish a torque transmission path. Then, the operator rotates the standardized manual tool to the designated position. This rotation is transmitted through the movable coupling member 240 to the switching source drive mechanism 180 to shut down the radiation source. Afterwards, the operator removes the force applied to the standardized manual tool, and the reset component 260 immediately springs back, pushing the movable coupling component 240 back to the position separated from the manual switch source input shaft 182, thus achieving automatic reset.

[0078] This enabled an emergency manual shutdown operation that did not rely on electricity, and the operators were not exposed to radiation throughout the process.

[0079] Although this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the specific embodiments described and shown herein. Various changes can be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims of this disclosure.

[0080] The features mentioned and / or shown in the foregoing description of exemplary embodiments of this disclosure may be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. Such combinations or substitutions should also be considered as including within the scope of protection of this disclosure.

Claims

1. A source-closing device, applied in radiotherapy equipment, characterized in that, The radiotherapy equipment includes a fixed frame, a treatment head, and a switching source drive mechanism disposed on the treatment head. The switching source device is disposed on the fixed frame, and the switching source device includes: A movable coupling member, configured to move relative to the fixed frame in response to manual operation of the movable coupling member, to engage with the switching source drive mechanism thereby establishing a torque transmission path; and The reset component is configured to reset the movable coupling component to a position separated from the switch source drive mechanism after the manual operation is completed.

2. The power-off device according to claim 1, characterized in that, The movable coupling member includes: An operating axis for receiving the manual operation; and A sleeve, detachably connected to the end of the operating shaft, is used to engage with the switching source drive mechanism.

3. The power-off device according to claim 1, characterized in that, The power-off device further includes a first sliding sleeve, which is sleeved on the movable coupling member and connected to the reset member, and the first sliding sleeve is capable of moving synchronously with the movable coupling member; or, The power-off device further includes a second sliding sleeve, which is sleeved on the movable coupling member and connected to the reset member, and the movable coupling member is slidable relative to the second sliding sleeve. or, The power-off device further includes a first sliding sleeve and a second sliding sleeve. The first sliding sleeve is sleeved on the movable coupling member and connected to the reset member, and the first sliding sleeve can move synchronously with the movable coupling member. The second sliding sleeve is sleeved on the first sliding sleeve and connected to the reset member, and the movable coupling member can slide relative to the second sliding sleeve.

4. The power-off device according to claim 3, characterized in that, It also includes a third sliding sleeve for reducing the sliding friction of the movable coupling member, the third sliding sleeve being disposed outside the first sliding sleeve or inside the second sliding sleeve.

5. The power-off device according to claim 1, characterized in that, It also includes at least one of the following: A guiding structure for guiding the movement of the movable coupling member; A limiting mechanism is used to limit the movement position of the movable coupling member; A fixing component is used to fix it to the fixing frame, and the movable coupling member slides through the fixing component and can engage with the switching source drive mechanism through the fixing component.

6. The power-off device according to claim 1, characterized in that, The reset member is an elastic element configured to be compressed and restored in response to force changes during the manual operation, thereby allowing the movable coupling member to be positioned closer to or further away from the switch source drive mechanism.

7. The power-off device according to claim 1, characterized in that, The movable coupling member for receiving the manual operation end is configured to cooperate with standardized manual tools.

8. A radiotherapy device, characterized in that, The device includes a fixed frame, a rotating frame, a treatment head disposed on the rotating frame, a switching source drive mechanism disposed on the treatment head, and a switching source device disposed on the fixed frame according to any one of claims 1 to 7, wherein the fixed frame is a radiation shield.

9. The radiotherapy device according to claim 8, characterized in that, It also includes a manual drive device for manually driving the rotating frame to rotate.

10. The radiotherapy device according to claim 8, characterized in that, The rotating frame is provided with alignment indicator marks, which are used to indicate that the switching source drive mechanism and the movable coupling member are in an aligned position that can engage.

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