Anti-collision device and radiotherapy equipment

Abstract

An anti-collision device and radiotherapy equipment, relating to the technical field of medical equipment, are used to reduce the safety risks of patients during radiotherapy. The anti-collision device comprises an anti-collision cover, and a detection part arranged on the outer side of the bottom end of the anti-collision cover along the axial direction of the anti-collision cover, and an axial gap is provided between the detection part and the anti-collision cover; the detection part is configured to collect a trigger signal and output a collision signal according to the trigger signal; wherein the trigger signal comprises a mechanical trigger signal or an electromagnetic trigger signal generated when the axial gap is reduced to a target value. The anti-collision device is used for radiotherapy.

Description

Technical Field

[0001] The present application relates to the technical field of medical equipment, and in particular to an anti-collision device and radiotherapy equipment. Background Art

[0002] Radiotherapy, chemotherapy and surgery are the three most common methods of cancer treatment at this stage. Among them, about 70% of cancer patients need to use radiotherapy during the treatment of cancer, and about 40% of cancers can be cured by radiotherapy. Radiotherapy equipment is usually divided into two categories: head tumor radiotherapy equipment and body tumor radiotherapy equipment. Among them, head tumor radiotherapy equipment mostly uses a rotating collimator with a hemispherical cavity or a cone-shaped cavity as the irradiation treatment cavity.

[0003] During radiotherapy for patients with lesions in the head, the patient's body is placed supinely on the three-dimensional treatment bed and the head is fixed by the head frame positioning device. Then, the three-dimensional treatment bed is used to send the patient's lesion to the center of the radiation focus according to the set treatment plan and electrical control instructions, so that the patient's lesion can be subjected to fixed-point irradiation treatment. During a radiotherapy process, by moving the three-dimensional treatment bed to change different positions (i.e., automatic positioning), irradiation treatment of multiple targets can be achieved, and the positioning accuracy of the target can be improved, reducing the auxiliary treatment time.

[0004] However, when the patient's lesion is in a relatively remote position, if there is an error in the calculation of the planned treatment space or an error in the motion control system of the three-dimensional treatment bed, it is easy for the actual movement distance of the three-dimensional treatment bed to exceed the space of the irradiation treatment cavity, causing the patient's head frame positioning device to accidentally hit the treatment cavity wall of the collimator (taking the collimator forming the treatment cavity as an example), causing unnecessary damage to the patient. Summary of the invention

[0005] The purpose of this application is to provide an anti-collision device and radiotherapy equipment to reduce the safety risks of patients during radiotherapy.

[0006] In order to achieve the above objectives, some embodiments of the present disclosure provide the following technical solutions:

[0007] On the one hand, an anti-collision device is provided. The anti-collision device includes an anti-collision cover and a detection part arranged on the outer side of the bottom end of the anti-collision cover along the axial direction of the anti-collision cover. An axial gap is provided between the detection part and the anti-collision cover. The detection part is configured to collect a trigger signal and output a collision signal according to the trigger signal. The trigger signal includes a mechanical trigger signal or an electromagnetic trigger signal generated when the axial gap is reduced to a target value.

[0008] The anti-collision device provided in some embodiments of the present disclosure is applied to radiotherapy equipment. The anti-collision device uses a detection unit to collect a trigger signal in real time, that is, a mechanical trigger signal or an electromagnetic trigger signal generated by a reduction in the axial gap between the anti-collision cover and the detection unit, and can output a collision signal according to the trigger signal to control the rotation of the collimator, thereby avoiding the anti-collision cover from colliding with the collimator, or timely controlling the collimator to stop rotating when the anti-collision cover collides with the collimator.

[0009] Furthermore, since the anti-collision cover is usually arranged in the corresponding collimation body and coaxially arranged with the collimation body, the anti-collision device arranges the detection part on the outer side of the bottom end of the anti-collision cover along the axial direction of the anti-collision cover, which can avoid reserving installation space for the detection part between the anti-collision cover and the collimation body, thereby appropriately reducing the radial gap between the anti-collision cover and the collimation body to avoid further reduction of the limited space in the treatment cavity due to the installation of the detection part.

[0010] In some embodiments, the anti-collision device further comprises: a fixing seat located on a side of the detection portion away from the anti-collision cover; and a first elastic portion connected to the fixing seat and the anti-collision cover. The first elastic portion is configured to buffer the first collision force of the anti-collision cover and reset the anti-collision cover.

[0011] In some embodiments, the anti-collision device further comprises: a second elastic part connected to the fixing seat and the detection part; the second elastic part is configured to buffer a second collision force of the anti-collision cover and reset the detection part, wherein the second collision force is smaller than the first collision force.

[0012] In some embodiments, the first elastic part includes: at least three first axial screws, and a first spring sleeved on each of the at least three first axial screws. The anti-collision cover is provided with first through holes corresponding to the at least three first axial screws. Each first axial screw is fixedly connected to the fixing seat through the corresponding first through hole. The two ends of each first spring are respectively against the fixing seat and the anti-collision cover.

[0013] In some embodiments, the detection part includes: a switch disk, and a plurality of detection switches evenly distributed around the switch disk. The second elastic part includes: at least three second axial screws, and a second spring sleeved on each of the at least three second axial screws. The switch disk is provided with second through holes corresponding to the at least three second axial screws. Each second axial screw passes through the corresponding second through hole and is fixedly connected to the fixing seat. The two ends of each second spring are respectively against the fixing seat and the switch disk.

[0014] In some embodiments, the detection switch is a proximity switch or a micro switch.

[0015] In some embodiments, the anti-collision device further comprises: a signal line connected to the detection unit, and a fixing rod connected to the fixing seat. The fixing rod is located on a side of the fixing seat away from the anti-collision cover. The fixing rod adopts a hollow structure, and the signal line is led out from the hollow part of the fixing rod.

[0016] In some embodiments, the anti-collision device further comprises: a signal line plug. The signal line plug is arranged at the end of the fixing rod away from the fixing seat and is connected to the signal line.

[0017] In some embodiments, the anti-collision device further comprises: a spacer sleeve mounted on the fixing rod, the spacer sleeve contacts the end surface of the fixing seat away from the anti-collision cover, and is configured to limit the distance between the fixing seat and the corresponding collimator.

[0018] In some embodiments, the anti-collision device further comprises: an adjusting portion sleeved on the fixing rod, wherein the adjusting portion is configured to adjust the distance between the anti-collision cover and the corresponding collimating body.

[0019] On the other hand, a radiotherapy device is provided, comprising: a body, a collimator rotatable relative to the body, and the anti-collision device as described above, wherein the anti-collision device is located in the collimator and fixedly connected to the body.

[0020] The beneficial effects that can be achieved by the radiotherapy equipment provided by some embodiments of the present disclosure are the same as the beneficial effects that can be achieved by the anti-collision device provided by some of the above embodiments, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0022] Figure 1 A cross-sectional schematic diagram of an anti-collision device provided in some embodiments of the present disclosure;

[0023] Figure 2 A partial side view schematic diagram of an anti-collision device provided in some embodiments of the present disclosure;

[0024] Figure 3 A cross-sectional schematic diagram of an adjustment portion provided in some embodiments of the present disclosure;

[0025] Figure 4 A partial cross-sectional schematic diagram of a radiotherapy device provided for some embodiments of the present disclosure.

[0026] Reference numerals:

[0027] 10-fixed seat, 20-anti-collision cover,

[0028] 30- detection unit, 301- switch panel,

[0029] 302-detection switch, 40-first elastic part,

[0030] 401-first axial screw, 402-first spring,

[0031] 50-second elastic part, 501-second axial screw,

[0032] 502-second spring, 60-fixed rod,

[0033] 601-fastening screw, 70-spacer,

[0034] 80-adjustment part, 801-fixed frame,

[0035] 802-locking nut, 803-fastening bolt,

[0036] 90-signal line plug, 100-body,

[0037] 200-collimator. DETAILED DESCRIPTION

[0038] To facilitate understanding, the anti-collision device and radiotherapy equipment provided by some embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0039] In the description of some embodiments of the present disclosure, it needs to be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing some embodiments of the present disclosure and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of some embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0041] In the description of some embodiments of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in some embodiments of the present disclosure can be understood according to specific circumstances.

[0042] See also Figure 1 and Figure 4 Some embodiments of the present disclosure provide an anti-collision device, which is applied to radiotherapy equipment. The radiotherapy equipment includes: a body 100, a collimator 200 rotatable relative to the body 100, and an anti-collision device. The anti-collision device includes: an anti-collision cover 20, and an anti-collision cover 20 along the axis direction (such as Figure 1 A detection portion 30 is arranged on the outer side of the bottom end thereof (in the direction indicated by the middle dotted line), and an axial gap is provided between the detection portion 30 and the anti-collision cover 20.

[0043] The above-mentioned anti-collision cover 20 is usually located in the collimation body 200 of the radiotherapy device, and the contour of the anti-collision cover 20 is consistent with the shape of the cover cavity of the collimation body 200, and the anti-collision cover 20 is coaxially arranged with the collimation body 200. The detection part 30 is arranged outside the bottom end of the anti-collision cover 20 along the axial direction of the anti-collision cover 20, so as to avoid reserving the installation space of the detection part 30 between the anti-collision cover 20 and the collimation body 200 in the radial direction, so as to appropriately reduce the radial gap between the anti-collision cover 20 and the collimation body 200, so as to avoid further reducing the limited space in the treatment cavity due to the installation of the detection part 30.

[0044] The detection unit 30 is configured to collect a trigger signal and output a collision signal according to the trigger signal, wherein the trigger signal includes a mechanical trigger signal or an electromagnetic trigger signal generated when the axial gap between the detection unit 30 and the anti-collision cover 20 is reduced to a target value.

[0045] Here, the reduction of the axial gap between the detection part 30 and the anti-collision cover 20 means that the anti-collision cover 20 is axially displaced toward the detection part 30 under the action of external force. For example, the anti-collision cover 20 collides with the patient or the patient's head frame positioning device, and the anti-collision cover 20 is deformed or moves to the side where the detection part 30 is located under the action of external force. In this way, when the axial gap between the detection part 30 and the anti-collision cover 20 is reduced to the target value, the detection part 30 can collect the trigger signal brought about by this, and output the collision signal according to the trigger signal to control the rotation of the collimator 200, thereby avoiding the collision between the anti-collision cover 20 and the collimator 200, or timely controlling the collimator 200 to stop rotating at the beginning of the collision between the anti-collision cover 20 and the collimator 200.

[0046] Please continue reading Figure 1 and Figure 4 In some embodiments, the anti-collision device further includes: a fixing seat 10 located on a side of the detection portion 30 away from the anti-collision cover 20; and a first elastic portion 40 connected to the fixing seat 10 and the anti-collision cover 20. The first elastic portion 40 is configured to buffer a first collision force of the anti-collision cover 20 (i.e., a force exerted on the anti-collision cover 20 due to the collision with the foreign object) and to reset the anti-collision cover 20.

[0047] The anti-collision cover 20 is fixed to the body 100 of the radiotherapy device through the fixing seat 10. In this way, when the collimator 200 rotates, the anti-collision cover 20 can remain relatively still with the body 100.

[0048] In some embodiments of the present disclosure, the anti-collision cover 20 is connected to the fixing seat 10 through the first elastic part 40, so that when the anti-collision cover 20 is initially subjected to the first collision external force, the first elastic part 40 is used to buffer the first collision force of the anti-collision cover 20, which can not only protect the anti-collision cover 20, but also gain time for the control response of the corresponding collimator 200, thereby avoiding a serious collision between the anti-collision cover 20 and the collimator 200, and thus effectively reducing the safety risk of the patient during radiotherapy. Of course, the first elastic part 40 can also ensure that the anti-collision cover 20 is reset after the first collision external force is eliminated, that is, the anti-collision cover 20 rebounds to the initial position before the force is applied, so as to facilitate the next use of the anti-collision device.

[0049] In some embodiments, see Figure 1 and Figure 2The detection unit 30 includes: a switch disk 301, and a plurality of detection switches 302 evenly distributed around the switch disk 301. In some embodiments of the present disclosure, a plurality of detection switches 302 are evenly arranged around the switch disk 301, and the plurality of detection switches 302 can be triggered when the axial gap between the anti-collision cover 20 and the plurality of detection switches 302 is reduced to a target value, so as to control the rotation of the alignment body 200 by outputting collision signals by the plurality of detection switches 302.

[0050] In addition, the structure and number of the detection switches 302 are selected and set according to actual needs. Exemplarily, the number of the detection switches 302 is not less than four.

[0051] It should be added that whether the trigger signal collected by the above-mentioned detection unit 30 is a mechanical trigger signal or an electromagnetic trigger signal is related to the structure of the detection unit 30. In some examples, the detection switch 302 is a proximity switch, such as an electromagnetic proximity switch. When the anti-collision cover 20 approaches the proximity switch, if the proximity switch senses that the axial gap between the anti-collision cover 20 and it is less than or equal to the target value, the proximity switch is triggered, that is, the detection unit 30 collects the electromagnetic trigger signal. In other examples, the detection switch 302 is a micro switch, such as a mechanical micro switch; the contact of the micro switch faces the anti-collision cover 20. When the anti-collision cover 20 presses the contact of the micro switch, the micro switch is triggered, that is, the detection unit 30 collects the mechanical trigger signal.

[0052] The collision signal output by the detection unit 30 according to the trigger signal is usually in the form of an electrical signal. For example, the target value is set to 0.1 cm, and the electrical signal that the detection unit 30 can output is 0 (low level) or 1 (high level).

[0053] In some examples, each detection switch 302 of the detection unit 30 takes a normally open signal, that is, each detection switch 302 is in an open state when not triggered. Each detection switch 302 is connected in parallel, corresponding to a logical "or" judgment. In this way, when the distance between the anti-collision cover 20 and each detection switch 302 is greater than 0.1 cm, each detection switch 302 in the detection unit 30 is not triggered and outputs an electrical signal of 0, so as to keep the control circuit of the collimator 200 as a passage, thereby controlling the normal rotation of the collimator 200. When the distance between the anti-collision cover 20 and each detection switch 302 is less than or equal to 0.1 cm (including the anti-collision cover 20 pressing each detection switch 302, that is, the distance between the two is 0 cm), any detection switch 302 in the detection unit 30 is triggered and outputs an electrical signal of 1, to alarm that a collision has occurred or is about to occur, so that the control circuit of the collimator 200 can be turned off to control the collimator 200 to stop rotating.

[0054] In other examples, each detection switch 302 of the detection unit 30 takes a normally closed signal, that is, each detection switch 302 is in a closed state when not triggered. Each detection switch 302 is connected in series, corresponding to the logic "and" judgment. In this way, when the distance between the anti-collision cover 20 and each detection switch 302 is greater than 0.1 cm, each detection switch 302 in the detection unit 30 is not triggered and outputs an electrical signal 1 to keep the control circuit of the collimator 200 open, thereby controlling the normal rotation of the collimator 200. When the distance between the anti-collision cover 20 and each detection switch 302 is less than or equal to 0.1 cm (including the anti-collision cover 20 pressing each detection switch 302, that is, the distance between the two is 0 cm), any detection switch 302 in the detection unit 30 is triggered and outputs an electrical signal 0 to alarm that a collision has occurred or is about to occur, so that the control circuit of the collimator 200 can be turned off to control the collimator 200 to stop rotating.

[0055] In some embodiments, please refer to Figure 1 The anti-collision device further includes a second elastic portion 50. The detection portion 30 is connected to the fixing seat 10 via the second elastic portion 50. The second elastic portion 50 is configured to buffer a second collision force of the anti-collision cover 20 (i.e., a force exerted on the anti-collision cover 20 by the collision with the foreign object) and reset the detection portion 30. The second collision force is smaller than the first collision force.

[0056] Here, the functions of the second elastic part 50 and the first elastic part 40 are similar, and both can buffer the collision force of the anti-collision cover 20. The difference between the two is that they are set in different positions and the magnitude of the forces that can be buffered is different. That is to say, a secondary buffering and resetting structure is provided in the anti-collision device. Since the second collision force that can be buffered by the second elastic part 50 is smaller than the first collision force that can be buffered by the first elastic part 40, when the anti-collision cover 20 collides with an external object (such as a patient or a head frame positioning device of the patient, etc.), the second elastic part 50 is preferentially triggered to perform the first level buffering on the second collision force of the anti-collision cover 20, and then when the force of the external object on the anti-collision cover 20 is greater than the second collision force, the first elastic part 40 is continuously triggered to perform the second level buffering on the first collision force of the anti-collision cover 20.

[0057] Therefore, some embodiments of the present disclosure provide a first elastic part 40 and a second elastic part 50 in the anti-collision device, which can gradually buffer the force applied to the anti-collision cover 20 when the anti-collision cover 20 collides with foreign objects, thereby further buying time for the control response of the collimator 200 to avoid serious collision between the anti-collision cover 20 and the collimator 200, thereby effectively improving the safety of the use of the radiotherapy equipment and further reducing the safety risks of patients during radiotherapy.

[0058] The first elastic portion 40 and the second elastic portion 50 are configured to buffer the collision force of the anti-collision cover 20 , and their structures can be selected and set according to actual needs, such as a force-releasing structure or an elastic structure that can buffer the force.

[0059] In some embodiments, see Figure 1 and Figure 2 The first elastic part 40 includes: at least three first axial screws 401, and a first spring 402 sleeved on each of the at least three first axial screws 401. The anti-collision cover 20 is provided with first through holes corresponding to the at least three first axial screws 401. Each first axial screw 401 passes through the corresponding first through hole and is fixedly connected to the fixing seat 10. The two ends of each first spring 402 are respectively against the fixing seat 10 and the anti-collision cover 20.

[0060] The number of the first through holes on the anti-collision cover 20 and their setting positions are selected and set according to actual needs. The number of the first axial screws 401 corresponds to the first through holes, and the structure of the first axial screws 401 is selected and set according to actual needs. Some embodiments of the present disclosure use the above-mentioned at least three first axial screws 401 to provide stable planar support for the anti-collision cover 20 before the anti-collision cover 20 is displaced by collision.

[0061] Optionally, the screw portion of the first axial screw 401 is a stepped columnar structure with thin ends and a thick middle. The thin end of the first axial screw 401 away from the head is provided with a thread and is threadedly connected to the fixing seat 10. The thin end of the first axial screw 401 close to the head is provided as a bare rod, and there is a gap between the first through hole and the corresponding first through hole, and the size of the gap is related to the safe movement margin allowed by the anti-collision cover 20.

[0062] Exemplarily, the difference between the diameter of the first through hole and the diameter of the thin end of the corresponding first axial screw 401 close to the head is greater than or equal to the safe movement margin allowed by the anti-collision cover 20. For example, the safe movement margin allowed by the anti-collision cover 20 is 5mm, that is, after the foreign object collides with the anti-collision cover 20 and before the collimation body 200 stops rotating, the anti-collision cover 20 can move up to 5mm along the radial direction of the first through hole. In this way, the difference between the diameter of the first through hole and the diameter of the thin end of the corresponding first axial screw 401 close to the head is greater than or equal to 5mm, which can win time for the control response of the collimation body 200, thereby avoiding a serious collision between the anti-collision cover 20 and the collimation body 200.

[0063] On this basis, the two ends of the first spring 402 mounted on each first axial screw 401 respectively abut against the fixed seat 10 and the anti-collision cover 20, so that after the foreign object collides with the anti-collision cover 20 and before the collimation body 200 stops rotating, the anti-collision cover 20 can translate in an indefinite direction or swing at a small angle relative to the fixed seat 10 following the direction of the force it is subjected to.

[0064] In some embodiments, please refer to Figure 1 and Figure 2 The detection part 30 includes: a switch disk 301, and a plurality of detection switches 302 evenly distributed around the switch disk 301. The second elastic part 50 includes: at least three second axial screws 501, and a second spring 502 sleeved on each of the at least three second axial screws 501. The switch disk 301 is provided with second through holes corresponding to the at least three second axial screws 501. Each second axial screw 501 is fixedly connected to the fixing seat 10 through the corresponding second through hole. The two ends of each second spring 502 are respectively against the fixing seat 10 and the switch disk 301.

[0065] The number of the second through holes on the switch plate 301 and their locations are selected and set according to actual needs. The number of the second axial screws 501 corresponds to the second through holes, and the structure of the second axial screws 501 is selected and set according to actual needs. Some embodiments of the present disclosure use the above-mentioned at least three second axial screws 501 to provide stable planar support for the switch plate 301 before the switch plate 301 is displaced by collision.

[0066] Optionally, the screw portion of the second axial screw 501 is a stepped columnar structure with thin ends and a thick middle. The thin end of the second axial screw 501 away from the head is provided with a thread and is threadedly connected to the fixing seat 10. The thin end of the second axial screw 501 close to the head is a bare rod, and there is a gap between the corresponding second through hole.

[0067] In addition, the two ends of the second spring 502 sleeved on each second axial screw 501 respectively abut against the fixing seat 10 and the switch plate 301. In this way, the switch plate 301 is floatingly connected to the fixing seat 10, that is, the switch plate 301 can translate in an indefinite direction or swing at a small angle relative to the fixing seat 10.

[0068] In addition, in some of the above embodiments, the first spring 402 and the second spring 502 are normally in a compressed state after being installed. That is to say, the first spring 402 has an elastic force on the fixing seat 10 and the anti-collision cover 20 at both ends thereof, and the second spring 502 has an elastic force on the fixing seat 10 and the switch plate 301 at both ends thereof. The elastic force of each first spring 402 and the elastic force of each second spring 502 can make the anti-collision cover 20 and the switch plate 301 rebound to the position before the collision after being displaced by the collision.

[0069] In the case where the detection switch 302 adopts a micro switch, the elastic force of the second spring 502 is slightly greater than the trigger force of the micro switch on the switch plate 301. After the foreign object collides with the anti-collision cover 20, the anti-collision cover 20 preferentially compresses the contact of the micro switch to its maximum stroke. If the contact of the micro switch has been compressed to its maximum stroke, but the collision between the foreign object and the anti-collision cover 20 has not yet been detached, then the anti-collision cover 20 continues to compress the second spring 502, and the compression margin of the second spring 502 (that is, the effective stroke that the second spring 502 can still be compressed) is used to buffer the collision force of the anti-collision cover 20, so as to protect the micro switch and gain time for the control response of the collimator 200.

[0070] The compression margin of the first spring 402 is usually greater than or equal to the sum of the compression margin of the second spring 502 and the maximum stroke of the contact in the micro switch. In the case where the compression margin of the first spring 402 is greater than the sum of the compression margin of the second spring 502 and the maximum stroke of the contact in the micro switch, if the compression margin of the second spring 502 has been fully compressed, but the collision between the foreign object and the anti-collision cover 20 has not yet been released, the anti-collision cover 20 can continue to compress the first spring 402, and the compression margin of the first spring 402 is used to buffer the collision force of the anti-collision cover 20, thereby further protecting the micro switch and further gaining time for the control response of the collimator 200.

[0071] It should be noted that the body 100 in the radiotherapy device is relatively large and has a complex structure. Figure 1 and Figure 3 The anti-collision device further includes a fixing rod 60 connected to the fixing seat 10. The fixing rod 60 is located on a side of the fixing seat 10 away from the anti-collision cover 20. The length of the fixing rod 60 is selected and set according to actual needs, and the fixing rod 60 is fixedly connected to the fixing seat 10, for example, by a plurality of fastening screws 601 arranged radially along the fixing rod 60. The anti-collision device is fixed to the body 100 through the fixing seat 10 and the fixing rod 60.

[0072] The body 100 of the radiotherapy device is usually provided with a control system, and the detection unit 30 outputs a collision signal to the control system, and the control system can control the rotation of the collimator 200 according to the collision signal. Exemplarily, the fixing rod 60 adopts a hollow structure. The anti-collision device also includes a signal line connected to the detection unit 30, and the signal line is led out from the hollow part of the fixing rod 60.

[0073] The signal line is usually electrically connected to the pins of each detection switch 302 in the detection unit 30. In some examples, the detection switches 302 are connected in parallel, and the number of signal lines is twice the number of detection switches 302. In other examples, the detection switches 302 are connected in series, and the number of signal lines is two, with less wiring and a simple structure.

[0074] For some examples, see Figure 3 The anti-collision device further includes a signal line plug 90. The signal line plug 90 is disposed at the end of the fixing rod 60 away from the fixing seat 10 and is connected to the signal line.

[0075] Here, one end of the signal line plug 90 is connected to the signal line, and the other end is connected to the control system.

[0076] Optionally, the signal line plug 90 and the end of the fixing rod 60 are connected by a plug-in connection, such as a threaded plug-in connection, which can ensure the rapidity and convenience of the signal line plug 90 and the signal line in installation and maintenance.

[0077] In some embodiments, see Figure 1 and Figure 4 The anti-collision device further includes: a spacer sleeve 70 sleeved on the fixing rod 60. The spacer sleeve 70 contacts the end surface of the fixing seat 10 away from the anti-collision cover 20, and is configured to limit the distance between the fixing seat 10 and the collimating body 200. Here, the size of the spacer sleeve 70 (such as wall thickness, outer wall diameter, axial length, etc.) can be selected and set according to actual needs.

[0078] Since the positions of the body 100 and the collimating body 200 are fixed, some embodiments of the present disclosure utilize the spacer 70 to adjust the gap between the fixing seat 10 and the body 100, thereby ensuring that there is a sufficient gap between the fixing seat 10 and the collimating body 200, thereby avoiding interference between the fixing seat 10 and the collimating body 200 when relative movement occurs, which is beneficial to improving the reliability of the use of the radiotherapy equipment.

[0079] In some embodiments, see Figure 3 The anti-collision device further includes an adjusting portion 80 sleeved on the fixing rod 60 , and the adjusting portion 80 is configured to adjust the distance between the anti-collision cover 20 and the collimating body 200 .

[0080] Here, the structure of the adjustment unit 80 can be selected and set according to actual needs. For example, Figure 3 As shown, the adjusting part 80 includes: a fixing frame 801 which is sleeved on the fixing rod 60 and can move relative to the fixing rod 60, and a locking nut 802 for locking and fixing the fixing frame 801 and the fixing rod 60. Among them, the end of the fixing frame 801 separated from the fixing rod 60 is provided with at least two mounting holes, so as to be fixed to the body 100 of the corresponding radiotherapy device through fastening bolts 803.

[0081] The contour of the anti-collision cover 20 matches the shape of the cover cavity of the collimator 200, and the central axes of the anti-collision cover 20 and the collimator 200 are usually located in the same straight line. In some embodiments of the present disclosure, the adjustment portion 80 sleeved on the fixing rod 60 can be used to adjust the distance between the anti-collision cover 20 and the collimator 200 accordingly, thereby avoiding interference between the anti-collision cover 20 and the collimator 200 when relative movement occurs, which is conducive to further improving the reliability of the radiotherapy device.

[0082] It is worth mentioning that the anti-collision device described in some of the above embodiments exists as an independent device, and its components can be assembled and debugged offline, and then directly installed on the body 100 of the radiotherapy device. This improves the system integration and convenience of the radiotherapy device, can greatly shorten the assembly and maintenance time of the radiotherapy device, and reduce the irradiation time of engineering service personnel under the radiation state.

[0083] See also Figure 4 Some embodiments of the present disclosure provide a radiotherapy device. The radiotherapy device includes: a body 100, a collimator 200 rotatably connected to the body 100, and an anti-collision device as described in some of the above embodiments. The beneficial effects that can be achieved by the radiotherapy device are the same as the beneficial effects that can be achieved by the anti-collision device provided in some of the above embodiments, and will not be described in detail here.

[0084] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0085] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An anti-collision device, characterized in that: include: Anti-collision shield; as well as A detection portion is arranged on the outer side of the bottom end of the anti-collision cover along the axial direction of the anti-collision cover, and an axial gap is provided between the detection portion and the anti-collision cover; The detection unit is configured to collect a trigger signal and output a collision signal according to the trigger signal; Wherein, the trigger signal includes a mechanical trigger signal or an electromagnetic trigger signal generated when the axial clearance is reduced to a target value; The anti-collision device also includes: A fixing seat located on a side of the detection portion away from the anti-collision cover; and a first elastic portion connected to the fixing seat and the anti-collision cover; the first elastic portion is configured to buffer a first collision force of the anti-collision cover and reset the anti-collision cover; a second elastic part connected to the fixing seat and the detection part; the second elastic part is configured to buffer a second collision force of the anti-collision cover and reset the detection part; wherein the second collision force is smaller than the first collision force; The contour of the anti-collision cover is consistent with the shape of the cover cavity of the collimator of the radiotherapy equipment.

2. The anti-collision device according to claim 1, characterized in that: The first elastic part comprises: at least three first axial screws, and a first spring sleeved on each of the at least three first axial screws; Among them, the anti-collision cover is provided with first through holes corresponding to the at least three first axial screws one by one; each of the first axial screws passes through the corresponding first through hole and is fixedly connected to the fixing seat; the two ends of each of the first springs are respectively against the fixing seat and the anti-collision cover.

3. The anti-collision device according to claim 1, characterized in that: The detection unit includes: a switch disk, and a plurality of detection switches evenly distributed around the switch disk; The second elastic part comprises: at least three second axial screws, and a second spring sleeved on each of the at least three second axial screws; Among them, the switch plate is provided with second through holes corresponding to the at least three second axial screws one by one; each of the second axial screws passes through the corresponding second through hole and is fixedly connected to the fixing seat; the two ends of each second spring are respectively against the fixing seat and the switch plate.

4. The anti-collision device according to claim 3, characterized in that: The detection switch is a proximity switch or a micro switch.

5. The anti-collision device according to claim 1, characterized in that: The anti-collision device further comprises: a signal line connected to the detection part, and a fixing rod connected to the fixing seat; Wherein, the fixing rod is located on a side of the fixing seat away from the anti-collision cover; The fixing rod adopts a hollow structure, and the signal line is led out from the hollow part of the fixing rod.

6. The anti-collision device according to claim 5, characterized in that: The anti-collision device further comprises: a signal line plug; the signal line plug is arranged at the end of the fixing rod away from the fixing seat and is connected to the signal line.

7. The anti-collision device according to claim 5, characterized in that: The anti-collision device further comprises: a spacer sleeve sleeved on the fixing rod; The spacer is in contact with an end surface of the fixing seat away from the anti-collision cover, and is configured to limit a distance between the fixing seat and a corresponding collimating body.

8. The anti-collision device according to any one of claims 5 to 7, characterized in that: The anti-collision device further comprises: an adjusting portion sleeved on the fixing rod; the adjusting portion is configured to adjust the distance between the anti-collision cover and the corresponding collimating body.

9. A radiotherapy device, characterized in that: include: Body; a collimator rotatable relative to the body; And, according to any one of claims 1 to 8, the anti-collision device is located in the collimator and fixedly connected to the body.

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