CN112535814A

CN112535814A - Anti-collision device and radiotherapy equipment

Info

Publication number: CN112535814A
Application number: CN201910895139.XA
Authority: CN
Inventors: 聂子恒
Original assignee: Our United Corp
Current assignee: Our United Corp
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2021-03-23

Abstract

An anti-collision device and radiotherapy equipment relate to the technical field of medical equipment and are used for reducing the safety risk of a patient in the radiotherapy process. The anti-collision device comprises an anti-collision cover and a detection part arranged outside the bottom end of the anti-collision cover along the axial direction of the anti-collision cover, and an axial gap is formed 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 in the event of a reduction of the axial clearance to a target value. The anti-collision device is used for radiotherapy.

Description

Anti-collision device and radiotherapy equipment

Technical Field

The application relates to the technical field of medical equipment, in particular to an anti-collision device and radiotherapy equipment.

Background

Radiotherapy, chemotherapy and surgery are three common approaches in the current cancer treatment process. Of these, about 70% of cancer patients require radiation therapy in the course of cancer treatment, and about 40% of cancers can be cured by radiation therapy. Radiotherapy apparatus is generally divided into two categories, head tumor radiotherapy apparatus and body tumor radiotherapy apparatus. Most of the head tumor radiotherapy equipment adopts a rotary collimating body with a hemispherical cavity or a conical cavity as an irradiation treatment cavity.

During the process of radiotherapy of a patient with a focus on the head, the body of the patient lies on the back on a three-dimensional treatment bed, the head of the patient is fixed through a head frame positioning device, and then the focus of the patient is sent to the center of a radiation focus by the three-dimensional treatment bed according to a set treatment plan and an electrical control instruction, so that fixed-point irradiation treatment can be carried out on the focus of the patient. In the process of one-time radiotherapy, different positions (namely automatic positioning) are replaced through the movement of the three-dimensional treatment bed, so that multi-target irradiation treatment can be realized, the positioning precision of the target is improved, and the treatment auxiliary time is shortened.

However, when the focus of the patient is in a deviated position, if the calculation of the planned treatment space is wrong, or the motion control system of the three-dimensional treatment couch is wrong, the actual motion distance of the three-dimensional treatment couch is easily beyond the space of the irradiation treatment chamber, which may cause the head frame positioning device of the patient to mistakenly touch the treatment chamber wall of the collimator body (taking the collimator body to form the treatment chamber as an example), and may cause unnecessary damage to the patient.

Disclosure of Invention

The application aims to provide an anti-collision device and radiotherapy equipment, which are used for reducing the safety risk of a patient in the radiotherapy process.

In order to achieve the above object, some embodiments of the present disclosure provide the following technical solutions:

in one aspect, a collision avoidance apparatus is provided. The anti-collision device comprises an anti-collision cover and a detection part arranged outside the bottom end of the anti-collision cover along the axial direction of the anti-collision cover. An axial gap is formed between the detection part and the anti-collision cover. The detection portion is configured to acquire 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 in the event of a reduction of the axial clearance to a target value.

The anti-collision device provided by some embodiments of the present disclosure is applied to radiotherapy equipment. The anti-collision device utilizes the detection part to collect the trigger signal in real time, namely, the mechanical trigger signal or the electromagnetic trigger signal generated by reducing the axial clearance between the anti-collision cover and the detection part can output the collision signal according to the trigger signal to control the rotation of the alignment body, thereby avoiding the collision between the anti-collision cover and the alignment body, or timely controlling the alignment body to stop rotating at the initial time of the collision between the anti-collision cover and the alignment body.

And, because anticollision cover sets up in the collimation that corresponds usually, and set up with the collimation coaxial line, consequently, this collision device sets up the detection part in the bottom outside of anticollision cover along the axis direction of anticollision cover, can avoid reserving the installation space of detection part between anticollision cover and collimation body to can suitably reduce the radial clearance between anticollision cover and the collimation body, further reduce limited treatment intracavity space because of the installation of detection part.

In some embodiments, the collision avoidance apparatus further comprises: the fixing seat is positioned on one side of the detection part, which is far away from the anti-collision cover; and the first elastic part is connected with the fixed seat and the anti-collision cover. The first elastic part is configured to buffer a first collision force of the anti-collision cover and to reset the anti-collision cover.

In some embodiments, the collision avoidance apparatus further comprises: the second elastic part is connected with the fixed seat and the detection part; the second elastic portion is configured to buffer a second collision force of the anti-collision cover and to reset the detection portion. Wherein the second impact force is less than the first impact force.

In some embodiments, the first elastic portion includes: the spring comprises at least three first axial screws and a first spring sleeved on each first axial screw in 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 one to one. Each first axial screw passes through the corresponding first through hole and is fixedly connected with the fixed seat. The two ends of each first spring are respectively propped against the fixed seat and the anti-collision cover.

In some embodiments, the detection portion includes: the switch panel and a plurality of detection switches evenly distributed on the periphery side of the switch panel. The second elastic portion includes: the spring comprises at least three second axial position screws and a second spring sleeved on each of the at least three second axial position screws. And second through holes which correspond to the at least three second axial screws one to one are formed in the switch panel. Each second axial screw passes through the corresponding second through hole and is fixedly connected with the fixed seat. Two ends of each second spring are respectively propped against the fixed seat and the switch panel.

In some embodiments, the detection switch is a proximity switch or a microswitch.

In some embodiments, the collision avoidance apparatus further comprises: a signal wire connected with the detection part and a fixed rod connected with the fixed seat. Wherein, the dead lever is located the one side of keeping away from the anticollision cover of fixing base. The fixing rod adopts a hollow structure, and the signal wire is led out from the hollow part of the fixing rod.

In some embodiments, the collision avoidance apparatus further comprises: and a signal line plug. The signal line plug is arranged at the end part of the fixed rod, which is far away from the fixed seat, and is connected with the signal line.

In some embodiments, the collision avoidance apparatus further comprises: the spacer bush is sleeved on the fixed rod. The spacer bush is in contact with the end face, far away from the anti-collision cover, of the fixed seat and is configured to limit the distance between the fixed seat and the corresponding alignment body.

In some embodiments, the collision avoidance apparatus further comprises: the adjusting part is sleeved on the fixing rod. The adjustment portion is configured to adjust a distance between the anti-collision cover and the corresponding collimating body.

In another aspect, a radiotherapy apparatus is provided. The radiotherapy apparatus comprises: the collision avoidance device comprises a machine body, a collimating body which can rotate relative to the machine body and the collision avoidance device. The anti-collision device is positioned in the collimating body and is fixedly connected with the machine body.

The beneficial effects that the radiotherapy equipment provided by some embodiments of the present disclosure can achieve are the same as those that the anti-collision device provided by some embodiments of the present disclosure can achieve, and are not described herein again.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a schematic cross-sectional view of a collision avoidance apparatus according to some embodiments of the present disclosure;

fig. 2 is a side view of a portion of a collision avoidance device according to some embodiments of the present disclosure;

FIG. 3 is a schematic cross-sectional view of an adjustment portion provided in some embodiments of the present disclosure;

figure 4 is a schematic cross-sectional view of a portion of a radiotherapy apparatus provided in some embodiments of the present disclosure.

Reference numerals:

10-a fixed seat, 20-an anti-collision cover,

30-a detection part, 301-a switch panel,

302-detection switch, 40-first elastic part,

401-first axial screw, 402-first spring,

50-a second elastic part, 501-a second axial screw,

502-a second spring, 60-a fixed rod,

601-fastening screw, 70-spacer bush,

80-an adjusting part, 801-a fixing frame,

802-lock nuts, 803-fastening bolts,

90-signal line plug, 100-machine body,

200-a collimator.

Detailed Description

For the convenience of understanding, the collision-preventing device and the radiotherapy apparatus provided by some embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

In the description of some embodiments of the present disclosure, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is used for convenience in describing some embodiments of the present disclosure and to simplify description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered limiting of the present disclosure.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed 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 that feature. In the description of some embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

In the description of some embodiments of the present disclosure, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in some embodiments of the present disclosure may be understood as appropriate by one of ordinary skill in the art.

Referring to fig. 1 and 4, some embodiments of the present disclosure provide a collision prevention device for radiotherapy equipment. Radiotherapy apparatus comprising: a body 100, a collimating body 200 rotatable relative to the body 100, and a collision preventing device. This collision preventing device includes: the collision avoidance system includes a collision avoidance cover 20, and a detection unit 30 provided outside a bottom end of the collision avoidance cover 20 in an axial direction thereof (a direction indicated by a dotted line in fig. 1), wherein an axial gap is provided between the detection unit 30 and the collision avoidance cover 20.

The anti-collision shield 20 is generally located in the collimating body 200 of the radiotherapy apparatus, and the contour of the anti-collision shield 20 matches the shape of the shield cavity of the collimating body 200, and the anti-collision shield 20 and the collimating body 200 are coaxially arranged. The detection part 30 is arranged at the outer side of the bottom end of the anti-collision cover 20 along the axial direction of the anti-collision cover 20, so that the installation space of the detection part 30 reserved between the anti-collision cover 20 and the collimating body 200 in the radial direction can be avoided, the radial gap between the anti-collision cover 20 and the collimating body 200 can be properly reduced, and the limited treatment cavity inner space is further reduced due to the installation of the detection part 30.

The above-described detection section 30 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 between the detection unit 30 and the collision avoidance cover 20 is reduced to a target value.

Here, the reduction in the axial gap between the detection unit 30 and the collision avoidance cover 20 means that the collision avoidance cover 20 is axially displaced toward the detection unit 30 by an external force. For example, when the anti-collision cap 20 collides with the patient or the headgear positioning device of the patient, the anti-collision cap 20 deforms or moves to the side where the detecting portion 30 is located under the action of external force, so that when the axial gap between the detecting portion 30 and the anti-collision cap 20 decreases to a target value, the detecting portion 30 can acquire a trigger signal caused by the axial gap, and output a collision signal according to the trigger signal to control the rotation of the collimator 200, thereby preventing the anti-collision cap 20 from colliding with the collimator 200, or timely controlling the collimator 200 to stop rotating at the beginning of the collision between the anti-collision cap 20 and the collimator 200.

With continuing reference to fig. 1 and 4, in some embodiments, the collision avoidance apparatus further comprises: a fixed seat 10 located on a side of the detection part 30 facing away from the collision prevention cover 20; and a first elastic part 40 connected with the holder 10 and the anti-collision cover 20. The first elastic part 40 is configured to buffer a first collision force of the anti-collision cover 20 (i.e., a force to which the anti-collision cover 20 is subjected due to a collision with a foreign object), and to restore the anti-collision cover 20.

The anti-collision cover 20 is fixed on the body 100 of the radiotherapy equipment through the fixing seat 10. Thus, in the case that the collimating body 200 rotates, the anti-collision cover 20 may remain relatively stationary with respect to the machine body 100.

In some embodiments of the present disclosure, the anti-collision cover 20 is connected to the fixing base 10 through the first elastic portion 40, so that at the beginning of the first collision external force acting on the anti-collision cover 20, the first elastic portion 40 is utilized to buffer the first collision stress of the anti-collision cover 20, the anti-collision cover 20 can be protected, and the time can be won for the control response of the corresponding collimating body 200, so as to avoid the severe collision between the anti-collision cover 20 and the collimating body 200, and further effectively reduce the safety risk of the patient during the radiotherapy process. Of course, the first elastic portion 40 can also ensure that the anti-collision cover 20 is reset after the first external collision force is removed, that is, the anti-collision cover 20 is rebounded to the initial position before being stressed, so that the next use of the anti-collision device is facilitated.

In some embodiments, referring to fig. 1 and 2, the detecting portion 30 includes: a switch board 301, and a plurality of detection switches 302 uniformly distributed on the circumferential side of the switch board 301. Some embodiments of the present disclosure provide a plurality of detection switches 302 uniformly on the circumferential side of the switch board 301, and can trigger the plurality of detection switches 302 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 straight body 200 by using the plurality of detection switches 302 to output collision signals.

In addition, the structure and the number of the detection switches 302 are selected according to actual requirements. Illustratively, the number of detection switches 302 is not less than four.

It should be added that the trigger signal collected by the detection unit 30 is a mechanical trigger signal or an electromagnetic trigger signal, and 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 the proximity switch is less than or equal to the target value, the proximity switch is triggered, that is, the detection part 30 acquires the electromagnetic trigger signal. In other examples, the detection switch 302 is a micro-switch, such as a mechanical micro-switch; the contacts of the micro-switches face 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 part 30 collects a mechanical trigger signal.

The detection unit 30 normally outputs an electric signal as a collision signal based on the trigger signal. For example, the target value is set to 0.1cm, and the electric signal that can be output by the detection unit 30 is 0 (low level) or 1 (high level).

In some examples, each detection switch 302 of the detection portion 30 takes a normally open signal, that is, each detection switch 302 is in an off state in an unfired state. The detection switches 302 are connected in parallel, as opposed to a logical OR determination. In this way, when the distance between the anti-collision cover 20 and each detection switch 302 is greater than 0.1cm, each detection switch 302 in the detection part 30 is not triggered and outputs the electrical signal 0 to maintain the control circuit of the collimating body 200 as a path, thereby controlling the collimating body 200 to normally rotate. When the distance between the anti-collision cover 20 and each detection switch 302 is less than or equal to 0.1cm (including the anti-collision cover 20 pressing each detection switch 302, that is, the distance between the two is 0cm), any detection switch 302 in the detection portion 30 is triggered and outputs the electrical signal 1 to alarm and prompt that a collision occurs or is about to occur, so that the control circuit of the collimating body 200 can be turned off to control the collimating body 200 to stop rotating.

In other examples, each detection switch 302 of the detection portion 30 takes a normally closed signal, that is, each detection switch 302 is in a closed state in an unfired state. The detection switches 302 are connected in series, as opposed to a logical AND determination. In this way, when the distance between the anti-collision cover 20 and each detection switch 302 is greater than 0.1cm, each detection switch 302 in the detection part 30 is not triggered and outputs the electrical signal 1 to maintain the control circuit of the collimating body 200 as a path, thereby controlling the collimating body 200 to normally rotate. In the case that the distance between the anti-collision cover 20 and each detection switch 302 is less than or equal to 0.1cm (including the anti-collision cover 20 pressing each detection switch 302, that is, the distance between the two is 0cm), any detection switch 302 in the detection portion 30 is triggered and outputs an electrical signal 0 to alarm that a collision occurs or is about to occur, so that the control circuit of the collimating body 200 can be turned off to control the collimating body 200 to stop rotating.

In some embodiments, with continued reference to fig. 1, the anti-collision device further includes a second elastic portion 50. The detecting unit 30 is connected to the fixing base 10 through the second elastic unit 50. The second elastic portion 50 is configured to buffer a second collision force of the anti-collision cover 20 (i.e., a force applied to the anti-collision cover 20 due to collision with a foreign object), and to reset the detection portion 30. Wherein the second impact force is less than the first impact force.

Here, the second elastic portion 50 and the first elastic portion 40 have similar functions and are each capable of buffering the collision force of the anti-collision cover 20, and the difference between the two portions is that the positions are different and the magnitudes of the buffered forces are different. That is, the collision prevention device is provided with a two-stage buffering reset structure. Since the second collision stress that can be buffered by the second elastic portion 50 is smaller than the first collision stress that can be buffered by the first elastic portion 40, at the beginning of a collision between the anti-collision cover 20 and a foreign object (e.g., a patient or a headgear positioning device of the patient), the second elastic portion 50 is preferentially triggered to perform a first-stage buffering on the second collision stress of the anti-collision cover 20, and then the first elastic portion 40 is continuously triggered to perform a second-stage buffering on the first collision stress of the anti-collision cover 20 when the acting force of the foreign object on the anti-collision cover 20 is larger than the second collision stress.

Therefore, the first elastic part 40 and the second elastic part 50 are arranged in the anti-collision device according to some embodiments of the present disclosure, and the force applied to the anti-collision cover 20 when the anti-collision cover 20 collides with a foreign object can be buffered step by step, so as to further win time for the control response of the collimating body 200, thereby avoiding the anti-collision cover 20 from seriously colliding with the collimating body 200, further effectively improving the use safety of radiotherapy equipment, and further reducing the safety risk of a patient in the radiotherapy process.

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 the structure thereof may be selectively set according to actual requirements, such as a force unloading structure or an elastic structure capable of buffering the force.

In some embodiments, referring to fig. 1 and 2, the first elastic portion 40 includes: at least three first axial screws 401, and a first spring 402 disposed around 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 one to one. Each first axial screw 401 passes through the corresponding first through hole and is fixedly connected with the fixed seat 10. Two ends of each first spring 402 respectively abut against the fixed seat 10 and the anti-collision cover 20.

The number of the first through holes on the anti-collision cover 20 and the arrangement positions thereof are selected according to actual requirements. The number of the first axial screws 401 corresponds to the number of the first through holes, and the structure of the first axial screws 401 is selected according to actual requirements. Some embodiments of the present disclosure may utilize the at least three first axial screws 401 to provide stable planar support of the collision avoidance shield 20 before the collision avoidance shield 20 is not displaced by a collision.

Optionally, the screw portion of the first axial screw 401 is a stepped columnar structure with two thin ends and a thick middle. The thin end of the first axial screw 401 far from the head is provided with a thread and is in threaded connection with the fixed seat 10. The thin end of the first axial screw 401 close to the head is arranged in a polished rod, and has a space with the corresponding first through hole, and the size of the space is related to the safety movement allowance allowed by the anti-collision cover 20.

Illustratively, the difference between the diameter of the first through hole and the diameter of the thin end of the corresponding first axial screw 401 near the head is greater than or equal to the safety movement allowance allowed by the anti-collision cover 20. For example, the allowable safe movement margin of the anti-collision cover 20 is 5 mm, that is, the anti-collision cover 20 can move by up to 5 mm in the radial direction of the first through hole after the foreign object collides with the anti-collision cover 20 until the collimator body 200 stops rotating. Thus, 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 5 mm, which can be used for gaining time for the control response of the collimating body 200, thereby avoiding the collision between the anti-collision cover 20 and the collimating body 200.

On this basis, two ends of the first spring 402 sleeved 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 collimating body 200 stops rotating, the anti-collision cover 20 can perform translation or small-angle swing in an indefinite direction relative to the fixed seat 10 along with the force direction of the anti-collision cover.

In some embodiments, with continuing reference to fig. 1 and 2, the detecting portion 30 includes: a switch board 301, and a plurality of detection switches 302 uniformly distributed on the circumferential side of the switch board 301. The second elastic portion 50 includes: at least three second axial screws 501, and a second spring 502 sleeved on each second axial screw 501 of the at least three second axial screws 501. The switch board 301 is provided with second through holes corresponding to the at least three second axial screws 501 one to one. Each second axial screw 501 passes through the corresponding second through hole and is fixedly connected with the fixed seat 10. Two ends of each second spring 502 are respectively abutted against the fixed seat 10 and the switch panel 301.

The number of the second through holes on the switch board 301 and the arrangement positions thereof are selected according to actual requirements. The number of the second axial screws 501 corresponds to the number of the second through holes, and the structure of the second axial screws 501 is selected and set according to actual requirements. Some embodiments of the present disclosure can provide stable planar support for the switchplate 301 before the switchplate 301 is displaced by collision using the at least three second axial screws 501.

Optionally, the screw portion of the second axial screw 501 is a stepped cylindrical structure with two thin ends and a thick middle. The thin end of the second axial screw 501 far from the head is provided with threads and is in threaded connection with the fixed seat 10. The thin end of the second axial screw 501 close to the head is arranged in a polished rod, and has a space with the corresponding second through hole.

Moreover, two ends of the second spring 502 sleeved on each second axial screw 501 respectively abut against the fixed seat 10 and the switch panel 301. In this way, the switch board 301 is connected to the fixing base 10 in a floating manner, that is, the switch board 301 can perform a translational motion or a small-angle swing motion with respect to the fixing base 10 in an indefinite direction.

Further, in some embodiments described above, the installed first and second springs 402, 502 are normally in a compressed state. That is, the first spring 402 elastically acts on the fixing seats 10 and the anti-collision covers 20 at both ends thereof, and the second spring 502 elastically acts on the fixing seats 10 and the switch board 301 at both ends thereof. The elastic force of each first spring 402 and the elastic force of each second spring 502 enable the anti-collision cover 20 and the switch panel 301 to rebound to a position before collision after being displaced by collision.

In the case where the detection switch 302 is a micro switch, the elastic force of the second spring 502 is slightly larger than the trigger force of the micro switch on the switch board 301. After a foreign object impacts the anti-collision cover 20, the anti-collision cover 20 preferentially compresses the contacts of the micro-switch to their maximum amount of travel. If the contact of the micro switch has been compressed to its maximum stroke amount, but the collision between the foreign object and the anti-collision cover 20 has not been released, the anti-collision cover 20 continues to compress the second spring 502, the collision force of the anti-collision cover 20 is buffered by using the compression allowance of the second spring 502 (i.e. the effective stroke of the second spring 502 that can also be compressed), the micro switch can be protected, and time is won for the control response of the collimating body 200.

The compression margin of the first spring 402 is typically greater than or equal to the sum of the compression margin of the second spring 502 and the maximum amount of travel of the contacts in the microswitch. Under the condition that the compression allowance of the first spring 402 is larger than the sum of the compression allowance of the second spring 502 and the maximum stroke amount of the contact in the microswitch, if the compression allowance of the second spring 502 is already compressed, but the collision between the foreign object and the anti-collision cover 20 is not released yet, the anti-collision cover 20 can still continue to compress the first spring 402, the collision stress of the anti-collision cover 20 is buffered by using the compression allowance of the first spring 402, so that the microswitch is further protected, and the time is further won for the control response of the collimating body 200.

It should be noted that the body 100 of the radiotherapy apparatus is large in size and complex in structure. In some embodiments, referring to fig. 1 and 3, the anti-collision device further includes a fixing rod 60 connected to the fixing base 10. The fixing lever 60 is located at a side of the fixing base 10 away from the anti-collision cover 20. The length of the fixing rod 60 is selected according to actual requirements, and the fixing rod 60 is fixedly connected with the fixing seat 10, for example, by a plurality of fastening screws 601 arranged along the radial direction of the fixing rod 60. The anti-collision device is fixed to the machine body 100 through the fixing base 10 and the fixing rod 60.

The body 100 of the radiotherapy apparatus is generally provided with a control system to which the detection unit 30 outputs a collision signal, and the control system can control the rotation of the collimating body 200 according to the collision signal. Illustratively, the fixing rod 60 has a hollow structure. The anti-collision device further includes a signal line connected to the detection part 30, the signal line being drawn out from a hollow portion of the fixing lever 60.

The signal line is usually electrically connected to a pin 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, the number of signal lines is two, the wiring is less, and the structure is simple.

In some examples, referring to fig. 3, the collision avoidance device further includes a signal line plug 90. The signal line plug 90 is disposed at an end of the fixing rod 60 far from the fixing base 10, and is connected to a signal line.

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

Optionally, the signal line plug 90 and the end of the fixing rod 60 are connected in a plug-in manner, for example, in a screw plug-in manner, so that rapidity and convenience of installation and maintenance of the signal line plug 90 and the signal line can be ensured.

In some embodiments, referring to fig. 1 and 4, the collision preventing device further includes: the spacer 70 is sleeved on the fixing rod 60. The spacer 70 is in contact with an end surface of the fixed seat 10 remote from the anti-collision cover 20 and is configured to define a spacing between the fixed seat 10 and the collimating body 200. Here, the size (for example, wall thickness, outer wall diameter, axial length, etc.) of the spacer 70 may be selected according to actual requirements.

Because the position of the machine body 100 and the collimating body 200 is fixed, some embodiments of the present disclosure can ensure that there is a sufficient gap between the fixing base 10 and the collimating body 200 by adjusting the gap between the fixing base 10 and the machine body 100 using the spacer 70, thereby avoiding interference between the fixing base 10 and the collimating body 200 when relative movement occurs, and facilitating improvement of the reliability of the radiotherapy apparatus.

In some embodiments, referring to fig. 3, the anti-collision device further includes an adjusting portion 80 sleeved on the fixing rod 60, wherein the adjusting portion 80 is configured to adjust a distance between the anti-collision cover 20 and the collimating body 200.

Here, the structure of the adjusting portion 80 may be selectively set according to actual requirements. Illustratively, as shown in fig. 3, the adjusting portion 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 which is used for locking and fixing the fixing frame 801 and the fixing rod 60. At least two mounting holes are formed at the end of the fixing frame 801 selected from the fixing rod 60, so as to be fixed on the machine body 100 of the corresponding radiotherapy apparatus by fastening bolts 803.

The contour of the anti-collision shield 20 matches the shape of the cavity of the collimating body 200, and the central axes of the anti-collision shield 20 and the collimating body 200 are generally collinear. Some embodiments of the present disclosure utilize the adjusting portion 80 sleeved on the fixing rod 60 to correspondingly adjust the distance between the anti-collision cover 20 and the collimating body 200, thereby avoiding interference between the anti-collision cover 20 and the collimating body 200 when relative motion occurs, and facilitating further improvement of the reliability of the radiotherapy apparatus.

It should be noted that the anti-collision device according to some embodiments of the present invention is provided as a separate device, and the components of the anti-collision device can be assembled and debugged online and then directly mounted on the body 100 of the radiotherapy apparatus. Therefore, the system integration and the convenience of the radiotherapy equipment are improved, the assembly and maintenance time of the radiotherapy equipment can be greatly shortened, and the irradiation time of engineering service personnel in a ray state is reduced.

Referring to fig. 4, some embodiments of the present disclosure provide a radiotherapy apparatus. The radiotherapy apparatus comprises: the collision preventing device comprises a machine body 100, an alignment body 200 rotatably connected with the machine body 100, and the collision preventing device according to some embodiments. The beneficial effects that this radiotherapy equipment can realize are the same with the beneficial effects that the collision preventing device that some embodiments provided can reach, do not describe here again.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A collision prevention device, comprising:

an anti-collision cover; and

the detection part 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 formed 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 in the event of a reduction of the axial clearance to a target value.

2. The collision avoidance device of claim 1, further comprising: the fixing seat is positioned on one side of the detection part, which is far away from the anti-collision cover; and

the first elastic part is connected with the fixed seat and the anti-collision cover; the first elastic part is configured to buffer a first collision stress of the anti-collision cover and reset the anti-collision cover.

3. The collision avoidance device of claim 2, wherein the collision avoidance device further comprises: the second elastic part is connected with the fixed seat and the detection part;

the second elastic part is configured to buffer a second collision stress of the anti-collision cover and reset the detection part; wherein the second impact force is less than the first impact force.

4. The collision prevention device according to claim 2 or 3,

the first elastic portion includes: the first spring is sleeved on each first axial screw in 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 one to one; each first axial screw passes through the corresponding first through hole and is fixedly connected with the fixed seat; and two ends of each first spring are respectively abutted against the fixed seat and the anti-collision cover.

5. The collision avoidance device according to claim 3, wherein the detection section includes: the detection switch comprises a switch disc and a plurality of detection switches uniformly distributed on the peripheral side of the switch disc;

the second elastic portion includes: the second spring is sleeved on each second axial screw in the at least three second axial screws;

the switch panel is provided with second through holes which correspond to the at least three second axial screws one to one; each second axial screw penetrates through the corresponding second through hole to be fixedly connected with the fixed seat; and two ends of each second spring are respectively propped against the fixed seat and the switch panel.

6. The collision avoidance device of claim 5, wherein the detection switch is a proximity switch or a micro switch.

7. The collision avoidance device of claim 2, wherein the collision avoidance device further comprises: the signal wire is connected with the detection part, and the fixing rod is connected with the fixing seat;

the fixing rod is positioned on one side of the fixing seat, which is far away from the anti-collision cover;

the fixing rod is of a hollow structure, and the signal wire is led out from the hollow part of the fixing rod.

8. The collision avoidance device of claim 7, wherein the collision avoidance device further comprises: a signal line plug; the signal line plug is arranged at the end part of the fixed rod, which is far away from the fixed seat, and is connected with the signal line.

9. The collision avoidance device of claim 7, wherein the collision avoidance device further comprises: the spacer bush is sleeved on the fixed rod;

the spacer bush is in contact with the end face of the fixed seat far away from the anti-collision cover and is configured to limit the distance between the fixed seat and the corresponding alignment body.

10. The collision avoidance device according to any one of claims 7 to 9, wherein the collision avoidance device further comprises: the adjusting part is sleeved on the fixed rod; the adjusting part is configured to adjust a distance between the anti-collision cover and the corresponding collimating body.

11. A radiotherapy apparatus, characterized by comprising:

a body;

a collimating body rotatable relative to the body;

and the collision preventing device as claimed in any one of claims 1 to 10, wherein the collision preventing device is located in the collimating body and is fixedly connected with the machine body.