An anti-collision protection mechanism and a radiotherapy device

Abstract

The present invention discloses an anti-collision protection mechanism and a radiotherapy device. The anti-collision protection mechanism is used for a radiotherapy device with a radiation unit having an internal cavity, and includes: an anti-collision protection cover located inside the cavity of the radiation unit, and an anti-collision detection member located at the rear end of the anti-collision protection cover and movable along the axis direction of the radiation unit. The anti-collision protection mechanism is used to detect a collision event and send out a collision signal when a patient is in the cavity of the radiation unit, and the patient or any device fixed to the patient's body collides with the anti-collision protection cover, causing the anti-collision protection cover to deform or move. When the patient or any device fixed to the patient accidentally touches the anti-collision protection cover, it deforms or moves and can touch the anti-collision detection member, and the anti-collision detection member detects the occurrence of the collision event and sends out a collision signal, so as to take timely measures to protect the patient. The anti-collision protection cover is located inside the cavity of the radiation unit, and the two can be as closely fitted as possible to avoid reducing the limited treatment cavity space.

Description

Technical Field

[0001] The present invention relates to the field of radiotherapy equipment, and particularly to an anti-collision protection mechanism and a radiotherapy equipment. Background Art

[0002] For radiotherapy equipment for head tumors, a rotating collimator is generally used as the treatment cavity. During treatment, the patient's head is positioned within the treatment cavity. However, the space of this treatment cavity is limited, and during the treatment process, the patient's head may accidentally touch the wall of the treatment cavity, causing unnecessary harm to the patient.

[0003] The prior art provides an anti-collision protection mechanism, which includes: an anti-collision protection cover and an anti-collision detection member. Among them, the contour of the anti-collision protection cover fits the shape of the cover cavity of the collimator, and there is a gap between the anti-collision protection cover and the collimator. The anti-collision detection member is arranged at this gap. When the anti-collision protection cover touches the anti-collision detection member, the anti-collision detection member emits a collision signal so that the radiotherapy equipment can stop working in time.

[0004] However, the existence of the gap between the anti-collision protection cover and the collimator will further reduce the limited space of the treatment cavity.

[0005] Disclosure

[0006] In view of this, the present invention provides an anti-collision protection mechanism and a radiotherapy equipment, which can solve the above technical problems. Specifically, the following technical solutions are included:

[0007] On the one hand, an anti-collision protection mechanism for a radiotherapy equipment is provided. The radiotherapy equipment includes a radiation unit having an internal cavity. The anti-collision protection mechanism includes: an anti-collision protection cover located inside the cavity of the radiation unit, and an anti-collision detection member located at the rear end of the anti-collision protection cover and movable along the axis direction of the radiation unit;

[0008] The anti-collision protection mechanism is used for when a patient is inside the cavity of the radiation unit, and the patient or any equipment fixed to the patient's body collides with the anti-collision protection cover, causing the anti-collision protection cover to deform or move, the anti-collision detection member detects the collision event and emits a collision signal.

[0009] In a possible implementation manner, the radiotherapy equipment further includes: a driving part located at the rear end of the radiation unit. The anti-collision detection member includes: a push rod located inside the driving part of the radiation unit and movable along the axis direction of the radiation unit; and a collision detector arranged at an interval from the push rod;

[0010] When the patient or any device fixedly attached to the patient's body collides with the anti-collision protective cover, causing the anti-collision protective cover to deform or move, the push rod moves along the axis direction of the radiation unit and contacts the collision detector to detect the collision event and issue a collision signal.

[0011] In a possible implementation, the driving part includes a transmission shaft connected to the radiation unit and a driver, and the driver drives the transmission shaft to rotate, thereby driving the radiation unit to rotate along the axis of the radiation unit.

[0012] The push rod is located inside the transmission shaft.

[0013] In a possible implementation, the anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is fixedly connected to the rear end of the anti-collision protective cover; and

[0014] A collision detector spaced a first set distance from the rear end of the push rod.

[0015] In a possible implementation, the anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is fixedly connected to the rear end of the anti-collision protective cover;

[0016] A collision detector located on the rear end face of the push rod; and

[0017] A collision body spaced a second set distance from the collision detector.

[0018] In a possible implementation, the collision body is a telescopic structure.

[0019] In a possible implementation, the anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is spaced a third set distance from the rear end of the anti-collision protective cover; and

[0020] A collision detector located on the front end face of the push rod.

[0021] In a possible implementation, an elastic buffer is further provided on the front end face of the push rod. When a touch event occurs, the elastic buffer touches the anti-collision protective cover prior to the anti-collision detection member.

[0022] In a possible implementation, the anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is spaced a fourth set distance from the rear end of the anti-collision protective cover;

[0023] and a collision detector located on the rear end face of the anti-collision protection cover.

[0024] In a possible implementation, an elastic reset member is provided between the push rod and the transmission shaft. After a touch event occurs, the elastic reset member is used to reset the anti-collision protection cover.

[0025] In a possible implementation, a lubricating sleeve is provided on the inner wall of the transmission shaft.

[0026] On the other hand, a radiotherapy device is provided, and the radiotherapy device includes any one of the above anti-collision protection mechanisms.

[0027] In a possible implementation, the radiotherapy device includes: a source body and a collimator body that have a common central axis and are sequentially covered from the outside to the inside;

[0028] a first gear transmission mechanism for driving the collimator body to rotate; and a second gear transmission mechanism for driving the source body to rotate.

[0029] In a possible implementation, the radiotherapy device further includes: a shielding body, and a first rolling support mechanism is provided between the source body and the shielding body;

[0030] a second rolling support mechanism is provided between the source body and the collimator body.

[0031] The beneficial effects of the technical solutions provided by the embodiments of the present invention at least include:

[0032] The anti-collision protection mechanism provided by the embodiments of the present invention sets an anti-collision protection cover in the cavity of the radiation unit. When a patient or any device fixed to the patient's body accidentally touches the anti-collision protection cover, the anti-collision protection cover deforms or moves, and can touch the anti-collision detection member located behind it. The anti-collision detection member detects the occurrence of a collision event and emits a collision signal, so that the treating physician can take measures in time to protect the patient, such as stopping the radiotherapy device in time to protect the patient from further harm. Among them, the anti-collision protection cover is located inside the cavity of the radiation unit, and the two can be as close as possible to avoid reducing the limited treatment cavity space. The anti-collision detection member is located at the rear end of the anti-collision protection cover, can detect the collision event in time and effectively, and when it is collided and the collision event is detected, since the anti-collision detection member can move axially, it can be effectively buffered to ensure that it will not be damaged due to the collision. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 It is a schematic diagram of the overall structure of an exemplary anti-collision protection mechanism;

[0035] Figure 2 It is Figure 1 An exemplary partial enlarged view of area A in

[0036] Figure 3 It is Figure 1 Another exemplary partial enlarged view of area A in

[0037] Figure 4 It is Figure 1 An exemplary partial enlarged view of area B in

[0038] Figure 5 It is Figure 1 Another exemplary partial enlarged view of area B in

[0039] Figure 6 It is a schematic diagram of the structure when a collision detector is provided at the front end of the push rod;

[0040] Figure 7 It is a schematic diagram of the structure when an elastic reset member is provided between the push rod and the collimator rotating shaft;

[0041] Figure 8 It is a schematic diagram of a partial structure of an exemplary radiotherapy device.

[0042] The reference numerals respectively represent:

[0043] 1 - anti-collision protection cover, 201 - push rod, 202 - collision detector, 203 - collision body, 204 - working end,

[0044] 3 - elastic buffer, 4 - elastic reset member, 5 - lubricating sleeve,

[0045] M1 - collimator, M2 - collimator rotating shaft, M3 - shielding body, M4 - source body, M5 - first driven gear,

[0046] M6 - first driving gear, M7 - first driving mechanism, M8 - source body transmission sleeve,

[0047] M9 - second driven gear, M10 - second driving gear, M11 - second driving mechanism,

[0048] M12 - Fixed sleeve, M13 - First bearing, M14 - Second bearing. Detailed implementation manners

[0049] To make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] An embodiment of the present invention provides a collision protection mechanism for a radiotherapy device. Among them, the radiotherapy device includes a radiation unit with an internal cavity. The collision protection mechanism includes: a collision protection cover located inside the cavity of the radiation unit, and a collision detection member located at the rear end of the collision protection cover and movable along the axis direction of the radiation unit.

[0051] When a patient is inside the cavity of the radiation unit, and the patient or any device fixed to the patient's body collides with the collision protection cover, causing the collision protection cover to deform or move, the collision detection member of this collision protection mechanism detects the collision event and emits a collision signal.

[0052] For the collision protection mechanism provided by the embodiment of the present invention, a fixed collision protection cover is arranged inside the cavity of the radiation unit. When the patient or any device fixed to the patient's body accidentally touches the collision protection cover, the collision protection cover deforms or moves, and can touch the collision detection member located behind it. The collision detection member detects the occurrence of the collision event and emits a collision signal, so that the treating physician can take timely measures to protect the patient, such as stopping the radiotherapy device in time to protect the patient from further harm. Among them, the collision protection cover is fixed inside the cavity of the radiotherapy device, and the two can be as closely attached as possible to avoid reducing the limited treatment cavity space. The collision detection member is located at the rear end of the collision protection cover, can detect the collision event in a timely and effective manner, and when it is collided and detects the occurrence of the collision event, since the collision detection member can move axially, it can be effectively buffered to ensure that it will not be damaged due to the collision.

[0053] Considering that the internal structures of different radiotherapy devices are different, in the following examples of the present invention, it is described by taking the radiation unit including a source body and a collimator as an example. Among them, a radiation source is arranged on the source body for emitting radiation, a collimator is arranged on the collimator, the radiation emitted by the radiation source intersects at a common focus through the collimator, and the inner wall of the collimator forms the cavity of the radiation unit. That is, the cavity of the above-mentioned radiation unit can be considered as the cavity of the collimator M1.

[0054] As shown in the attached Figure 1 figure, the collision protection cover 1 can be located inside the collimator M1 of the radiotherapy device, and the collision detection member can be axially movably located on the collimator rotating shaft M2.

[0055] In an embodiment of the present invention, the outer contour of the anti-collision protection cover 1 can conform to the cavity of the radiation unit, for example, the inner cavity shape of the collimator M1. On the premise of not affecting the anti-collision protection cover 1 from being touched and undergoing appropriate deformation or movement, the two can be as closely attached as possible. As an example, the anti-collision protection cover 1 can be arranged in the cavity of the radiation unit through a connecting member. The connecting member can be a fastening screw, and an elastic member, such as a spring member, can be further sleeved on the rod body of the fastening screw located between the anti-collision protection cover 1 and the cavity of the radiation unit.

[0056] Exemplarily, the radiotherapy device provided by the embodiment of the present invention may further include: a driving part located at the rear end of the radiation unit. Among them, the anti-collision detection member includes: a push rod located in the driving part of the radiation unit and movable along the axis direction of the radiation unit; and a collision detector spaced from the push rod.

[0057] When a patient or any device fixed to the patient's body collides with the anti-collision protection cover, causing the anti-collision protection cover to deform or move, the push rod moves along the axis direction of the radiation unit and contacts the collision detector to detect the collision event and send out a collision signal. By using the axial movement of the push rod to contact the collision detector, the effective detection of the collision event is realized.

[0058] As an example, the driving part may include: a transmission shaft connected to the radiation unit and a driver. The driver drives the transmission shaft to rotate, thereby driving the radiation unit to rotate along the axis of the radiation unit; and the push rod is located inside the transmission shaft.

[0059] Among them, the transmission shaft connected to the radiation unit can be the collimator rotation shaft M2.

[0060] The following gives an example of how the anti-collision detection member detects the occurrence of a collision event:

[0061] As an example (1), the anti-collision detection member includes: a push rod 201 located inside the transmission shaft and movable along the axis direction of the radiation unit, for example, as shown Figure 2 The push rod 201 is axially movably located inside the collimator rotation shaft M2, and the front end of the push rod 201 is fixedly connected to the rear end of the anti-collision protection cover 1; and a collision detector 202 spaced a first set distance from the rear end of the push rod 201. Among them, the first set distance can be set according to the monitoring requirements of anti-collision.

[0062] It should be noted that in the embodiment of the present invention, the front end of the push rod 201 involved refers to the end close to the anti-collision protection cover 1, and vice versa, the rear end refers to the end far from the anti-collision protection cover 1.

[0063] For Example (i), when the patient (such as the patient's head) or any device fixed to the patient's body accidentally touches the anti-collision protection cover 1, after the anti-collision protection cover 1 deforms or displaces, it can push the push rod 201 backward. The moving push rod 201 can touch the collision detector 202, and the collision detector 202 detects the occurrence of a collision event and emits a collision signal.

[0064] Exemplarily, the collision detector 202 can be directly installed on other components behind the push rod 201, or alternatively, brackets can be installed on these other components, and the collision detector 202 can be installed on the brackets, as long as it is ensured that the collision detector 202 is located behind the push rod 201 and is opposite to the rear end face of the push rod 201.

[0065] As Example (ii), the anti-collision detection member includes: a push rod 201 located inside the transmission shaft and movable along the axis direction of the radiation unit, for example, as Figure 3 shown, the push rod 201 is axially movable inside the collimator shaft M2, and the front end of the push rod 201 is fixedly connected to the rear end of the anti-collision protection cover 1; a collision detector 202 located on the rear end face of the push rod 201; and a collision body 203 spaced a second set distance opposite to the collision detector 202. Among them, the second set distance can be set according to the monitoring requirements of anti-collision.

[0066] For Example (ii), when the patient (such as the patient's head) or any device fixed to the patient's body accidentally touches the anti-collision protection cover 1, the anti-collision protection cover 1 can push the push rod 201 and the collision detector 202 thereon backward. The moving collision detector 202 can touch the collision body 203, and the collision detector 202 detects the occurrence of a collision event and emits a collision signal.

[0067] Among them, the collision body 203 can be directly installed on other components behind the push rod 201, or alternatively, brackets can be installed on these other components, and the collision body 203 can be installed on the brackets, as long as it is ensured that the collision body 203 is located behind the collision detector 202 and is opposite to it.

[0068] To protect the collision detector 202, the collision body 203 can be set as a retractable structure. After the collision detector 202 touches it, it can retract to protect the collision detector 202. Further, if the collision detector 202 returns to its original position, the collision body 203 can also return to its original position.

[0069] The structure of the collision body 203 can be various. For example, its structure includes but is not limited to: plate-shaped, block-shaped, spherical or hemispherical, etc.

[0070] As Example (iii), the anti-collision detection member includes: a push rod 201 located inside the transmission shaft and movable along the axis direction of the radiation unit, for example, asFigure 4 As shown, the push rod 201 is axially movable inside the collimator body rotation axis M2, and the front end of the push rod 201 is opposite to the rear end of the anti-collision protection cover 1 at a third set distance; and a collision detector 202 is located on the front end face of the push rod 201. Among them, the third set distance can be set according to the monitoring requirements of anti-collision.

[0071] For Example (III), when the patient (such as the patient's head) or any device fixed to the patient's body accidentally touches the anti-collision protection cover 1, the anti-collision protection cover 1 moves backward. The moving anti-collision protection cover 1 can touch the collision detector 202, and the collision detector 202 detects the occurrence of a collision event and issues a collision signal.

[0072] Furthermore, in Example (III), as shown in the attached Figure 4 and the attached Figure 6 As shown, an elastic buffer member 3 can also be provided on the front end face of the push rod 201. When a touch event occurs, the elastic buffer member 3 touches the anti-collision protection cover 1 prior to the collision detector 202. In this way, not only can it be ensured that the anti-collision protection cover 1 and the collision detector 202 do not touch when a collision event does not occur, preventing false detection, but also the collision detector 202 can be protected.

[0073] The elastic buffer member 3 can include: a fixed section fixedly connected to the front end face of the push rod 201; and a buffer section connected to the fixed section and in contact with the rear end face of the anti-collision protection cover 1 at the same time. By using the buffer section to always be in contact with the anti-collision protection cover 1, it is more conducive to optimizing the above effects.

[0074] For example, the fixed section can be closely attached to the front end face of the push rod 201, and the buffer section can extend in a direction perpendicular to the fixed section until it contacts the anti-collision protection cover 1. Furthermore, the buffer section can not only include the above-mentioned vertical section, but also include a horizontal section perpendicularly connected to the vertical section to increase the contact area with the anti-collision protection cover 1 and optimize the above effects.

[0075] As an example of (IV), the anti-collision detection member includes: a push rod 201 located inside the transmission shaft and movable along the axis direction of the radiation unit. For example, as shown in the attached Figure 5 As shown, the push rod 201 is axially movable inside the collimator body rotation axis M2, and the front end of the push rod 201 is opposite to the rear end of the anti-collision protection cover 1 at a fourth set distance; and a collision detector 202 is located on the rear end face of the anti-collision protection cover 1. Among them, the fourth set distance can be set according to the monitoring requirements of anti-collision.

[0076] For Example (4), when the patient (such as the patient's head) or any device fixed to the patient's body accidentally touches the anti-collision protection cover 1, the anti-collision protection cover 1 drives the collision detector 202 to move backward. The moving collision detector 202 can touch the front end face of the push rod 201. The collision detector 202 detects the occurrence of a collision event and emits a collision signal.

[0077] For each of the above examples, the sizes of the set distances involved are such that, when no collision event occurs, the collision detector 202 will not be touched, and only when a collision event occurs, the collision detector 202 can be touched in a timely and effective manner.

[0078] In the embodiments of the present invention, the collision detector 202 may not be set to only one. In a possible implementation, the collision detector 202 may be set to a plurality of uniformly distributed ones. As shown in the attached Figure 6 figure, the collision detector 202 may be set to a plurality of uniformly distributed ones along the circumferential direction, such as 3, 4, 5, etc.

[0079] As mentioned above, the push rod 201 may be disposed inside the collimator rotating shaft M2 of the radiotherapy device, that is, a rod cavity for accommodating the push rod 201 may be provided along the axial direction of the collimator rotating shaft M2. The axial length of the rod cavity is longer than the axial length of the push rod 201 to facilitate the axial movement of the push rod 201 therein. Among them, the rod cavity may be coaxial with the collimator rotating shaft M2. The push rod 201 may completely pass through the collimator rotating shaft M2 or may only be located in the front section of the collimator rotating shaft M2. In a possible implementation, the push rod 201 may be made to penetrate the collimator rotating shaft M2 along the axial direction.

[0080] To optimize the above anti-collision effect, as shown in the attached Figure 6 figure, an operating end 204 widened along the radial direction may be provided at the front end of the push rod 201, that is, the area of the end face of the operating end 204 is larger than the area of the front end face of the push rod 201. The operating end 204 may replace the front end of the push rod 201 involved in the above examples and achieve the same and more beneficial effects. For example, the operating end 204 may be in the shape of a circular plate or a rectangular plate, and the rear end face of the operating end 204 may be opposite to the front end face of the collimator rotating shaft M2.

[0081] For example, as shown in the attached Figure 7 figure, an elastic reset member 4 may be provided between the push rod 201 and the collimator rotating shaft M2. After a touch event occurs, the elastic reset member 4 is used to reset the anti-collision protection cover 1. This facilitates the repeated use of the anti-collision protection mechanism. At the same time, the resilience provided by the elastic reset member 4 can make both the anti-collision protection cover 1 and the push rod 201 rebound to the initial position before the collision.

[0082] Regarding the arrangement of the elastic reset member 4, a first step can be provided on the outer wall of the push rod 201, for example, on the outer wall of its front end, and a second step can be provided on the inner wall of the transmission shaft, for example, on the inner wall of the collimator rotating shaft M2 at its front end, and the elastic reset member 4 is limited between the first step and the second step.

[0083] It can be understood that the first step is in the front and the second step is in the rear to ensure that when the push rod 201 moves backward, the first step can compress the elastic reset member 4 backward, while the position of the second step is fixed to ensure that a reset force is provided for the subsequent elastic expansion and contraction of the elastic reset member 4.

[0084] The structures of the first step and the second step can be the same or different. For example, they can be multiple bumps distributed at intervals in the circumferential direction, or they can be an integral annular boss. The applicable reset elastic members include but are not limited to: springs or elastic blocks.

[0085] Furthermore, as shown in the appendix Figure 1 In order to reduce the frictional force generated when the push rod 201 slides relative to the transmission shaft, for example, the collimator rotating shaft M2, in an embodiment of the present invention, a lubricating sleeve 5 is provided on the inner wall of the transmission shaft to avoid wear and reduce resistance. Among them, the lubricating sleeve 5 can be a bushing with self-lubricating function, or a lubricating coating formed on, for example, coated on the inner wall of the transmission shaft.

[0086] In an embodiment of the present invention, the collision detector 202 involved can be a microswitch or a proximity switch, and it can also be connected to the control system of the radiotherapy device, so that a collision signal can be sent to the control system of the radiotherapy device, and the control system can then issue an instruction to stop the operation of the radiotherapy device.

[0087] On the other hand, an embodiment of the present invention also provides a radiotherapy device, where the radiotherapy device includes any one of the above anti-collision protection mechanisms.

[0088] In an embodiment of the present invention, the radiotherapy device is used to emit radiation and use the radioactivity of the radiation to kill tumor cells, so as to achieve the purpose of treatment. The type of radiation in this application is not limited. For example, it can be γ-rays, X-rays, or other protons, neutrons, or heavy ions, etc.

[0089] In addition, the radiotherapy device can be a stereotactic radiotherapy device, and the radiotherapy device is a rotational focusing radiotherapy device, or a static focusing radiotherapy device.

[0090] The following takes the radiotherapy device as a rotational focusing radiotherapy device as an example for illustration.

[0091] Exemplarily, the radiotherapy device includes: a source body and a collimator body that have a common central axis and are coaxially enclosed from outside to inside. The source body is provided with a radiation source for emitting radiation. The radiation source can be, for example, a natural isotope radiation source, such as cobalt-60, which can emit γ rays; or it can be an accelerator, which can emit X rays. The collimator body is provided with a collimator, and the radiation emitted by the radiation source can be focused on a common focus after passing through the collimator. For the type of the radiation source, the embodiments of the present invention do not make any limitations. For example, when the radiation source is an accelerator, the radiation unit can include multiple accelerators, each accelerator emits X rays respectively, and the X rays emitted by the multiple accelerators are focused on a common focus; or the radiation unit includes at least one accelerator, and the X-ray beam emitted by the accelerator is split, so that multiple X rays are focused on a common focus; or the radiation unit includes at least one accelerator, the accelerator can move relative to the collimator body, and the X rays emitted by the accelerator sequentially pass through different collimators of the collimator body, so as to achieve the focusing of the X rays on a common focus.

[0092] In the following embodiments and accompanying drawings, a radiotherapy device with a γ radiation source as the radiation source is taken as an example for illustration.

[0093] Exemplarily, as shown in the attached Figure 8 figure, the radiotherapy device further includes a source body M4 and a collimator body M1 that have a common central axis and are coaxially enclosed from outside to inside. Among them, both the collimator body M1 and the source body M4 can be rotated through a transmission mechanism to achieve the selection of different collimation apertures.

[0094] In a possible example, the radiotherapy device may further include: a first gear transmission mechanism for driving the rotation of the collimator body M1; and a second gear transmission mechanism for driving the rotation of the source body M4.

[0095] Among them, the first gear transmission mechanism includes: a collimator body rotating shaft M2 whose front end is fixedly connected to the collimator body M1 (which can be understood as the transmission shaft mentioned above connected to the radiation unit);

[0096] a first driven gear M5 fixedly connected to the rear end of the collimator body rotating shaft M2;

[0097] a first driving gear M6 meshing with the first driven gear M5;

[0098] a first driving mechanism M7 for driving the rotation of the first driving gear M6.

[0099] The second gear transmission mechanism includes: a source body transmission sleeve M8 sleeved outside the collimator body rotating shaft M2 and whose front end is fixedly connected to the source body M4;

[0100] a second driven gear M9 fixedly connected to the rear end of the source body transmission sleeve M8;

[0101] A second driving gear M10 meshing with a second driven gear M9;

[0102] A second driving mechanism M11 for driving the second driving gear M10 to rotate.

[0103] The radiotherapy device provided by the embodiment of the present invention drives the collimator M1 to rotate by using a first gear transmission mechanism, and drives the source body M4 to rotate by using a second gear transmission mechanism. The gear transmission mechanism is driven based on a rolling contact method, and the friction during the transmission process is line-line friction, which can significantly reduce the wear of the gear transmission mechanism. Furthermore, it can ensure that the rotary gamma radiation unit still maintains good rotation accuracy during long-term use. In addition, by driving the collimator M1 and the source body M4 to rotate independently through two gear transmission mechanisms respectively, it is not only beneficial to improve the service life of the gear transmission mechanism, but also can improve the controllability of the rotation process.

[0104] Furthermore, the radiotherapy device may further include: a shielding body M3, and a fixing sleeve M12 may be provided between the source body transmission sleeve M8 and the shielding body M3 to facilitate the disassembly and assembly of the shielding body M3.

[0105] A first rolling support mechanism may be provided between the source body M4 and the shielding body M3, and a second rolling support mechanism may be provided between the source body M4 and the collimator M1. By using the rolling support mechanism, it is beneficial for following and has a supporting effect, which can avoid the sagging of the source body M4 and the collimator M1 caused by only supporting the source body M4 through the source body transmission sleeve M8 and only supporting the collimator M1 through the collimator rotating shaft M2. Among them, both the first rolling support mechanism and the second rolling support mechanism may be bearings or cam follower bearings.

[0106] In order to reduce friction, a first bearing M13 may be provided between the collimator rotating shaft M2 and the source body transmission sleeve M8, and a second bearing M14 is provided between the source body transmission sleeve M8 and the fixing sleeve M12.

[0107] The above description is only for facilitating the understanding of the technical solution of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An anti-collision protection mechanism for radiotherapy equipment, characterized in that, The radiotherapy device includes a radiation unit having an internal cavity. The anti-collision protection mechanism includes: an anti-collision protection cover located inside the cavity of the radiation unit, and an anti-collision detection member located at the rear end of the anti-collision protection cover and movable along the axis direction of the radiation unit. The radiotherapy device further includes: a driving part located at the rear end of the radiation unit. The anti-collision detection member includes: a push rod located inside the driving part of the radiation unit and movable along the axis direction of the radiation unit; and a collision detector spaced from the push rod. The anti-collision protection mechanism is used to detect a collision event and send a collision signal when a patient is inside the cavity of the radiation unit and the patient or any device fixed to the patient's body collides with the anti-collision protection cover, causing the anti-collision protection cover to deform or move. Among them, the collision detector is a microswitch or a proximity switch, and the collision detector is connected to the control system of the radiotherapy device. The control system is configured to send an instruction to stop the operation of the radiotherapy device after receiving the collision signal sent by the anti-collision detector.

2. The anti-collision protection mechanism according to claim 1, characterized in that, The driving part includes: a transmission shaft connected to the radiation unit and a driver. The driver drives the transmission shaft to rotate, thereby driving the radiation unit to rotate along the axis of the radiation unit. The push rod is located inside the transmission shaft.

3. The anti-collision protection mechanism according to claim 2, characterized in that, The anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is fixedly connected to the rear end of the anti-collision protection cover; and A collision detector spaced a first set distance from the rear end of the push rod.

4. The anti-collision protection mechanism according to claim 2, characterized in that, The anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is fixedly connected to the rear end of the anti-collision protection cover; A collision detector located on the rear end face of the push rod; and A collision body spaced a second set distance from the collision detector.

5. The anti-collision protection mechanism according to claim 4, characterized in that, The collision body is a telescopic structure.

6. The anti-collision protection mechanism according to claim 2, characterized in that The anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is spaced a third set distance from the rear end of the anti-collision protection cover; and A collision detector located on the front end face of the push rod.

7. The anti-collision protection mechanism according to claim 6, characterized in that, An elastic buffer is further provided on the front end face of the push rod. When a touch event occurs, the elastic buffer touches the anti-collision protection cover prior to the anti-collision detection member.

8. The anti-collision protection mechanism according to claim 2, characterized in that, The anti-collision detection member includes: a push rod located inside the transmission shaft and movable along the axis direction of the radiation unit, and the front end of the push rod is spaced a fourth set distance from the rear end of the anti-collision protection cover; And a collision detector located on the rear end face of the anti-collision protection cover.

9. The anti-collision protection mechanism according to claim 2, characterized in that, An elastic reset member is provided between the push rod and the transmission shaft. After a touch event occurs, the elastic reset member is used to reset the anti-collision protection cover.

10. The anti-collision protection mechanism according to claim 2, characterized in that, A lubricating sleeve is provided on the inner wall of the transmission shaft.

11. A radiotherapy device, characterized in that, The radiotherapy device includes the anti-collision protection mechanism according to any one of claims 1-10.

12. The radiotherapy device according to claim 11, wherein The radiotherapy device includes: a source body and a collimator body that have a common central axis and are coaxially enclosed from the outside to the inside in sequence; a first gear transmission mechanism for driving the rotation of the collimator body; and a second gear transmission mechanism for driving the rotation of the source body.

13. The radiotherapy device according to claim 12, characterized in that, The radiotherapy device further includes: a shielding body, and a first rolling support mechanism is provided between the source body and the shielding body; a second rolling support mechanism is provided between the source body and the collimator body.

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