Positioning mechanism and radiotherapy equipment

Abstract

The present invention discloses a positioning mechanism and radiotherapy equipment, wherein the positioning mechanism comprises: two side supports respectively connected to two sides of a radiation head; a top support connected to the top of the side supports; a first positioning member located on the top support; and a second positioning member located on the top of a frame, wherein the first positioning member and the second positioning member correspond one to one. The positioning mechanism can improve the installation accuracy of the radiation head, and during the installation process, there is no need to repeatedly disassemble and assemble the heavy radiation head, which significantly simplifies the installation process and reduces the installation difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of radiotherapy, and in particular to a positioning mechanism and radiotherapy equipment. Background Art

[0002] Gamma knife and medical linear accelerator are common radiotherapy equipment used for tumor treatment. Taking the gamma knife as an example, it includes: a frame, a focused radiation head installed on the frame, wherein the focused radiation head is installed with multiple radiation sources. In order to focus the multiple radiation sources on the isocenter, it is very necessary to ensure the installation accuracy of the focused radiation head.

[0003] At present, the focused radiation head is usually preliminarily installed on the rack, and fitting pads are set between the guide rails on both sides of the focused radiation head and the mounting side panels of the rack on the same side. The position of the focused radiation head on the rack is adjusted by selecting fitting pads of different thicknesses to achieve good installation accuracy.

[0004] The above process requires repeated disassembly and assembly of the focused radiation head, and the focused radiation head is heavy, which increases the difficulty of installation. Summary of the invention

[0005] In view of this, the present invention provides a positioning mechanism and radiotherapy equipment, which can solve the above technical problems. Specifically, it includes the following technical solutions:

[0006] In one aspect, a positioning mechanism is provided, the positioning mechanism comprising: two side supports respectively connected to two sides of the radiation head;

[0007] a top support connected to the top of the side support;

[0008] a first positioning member located on the top support;

[0009] A second positioning member located at the top of the frame;

[0010] The first positioning member corresponds to the second positioning member one by one.

[0011] In a possible implementation, the positioning mechanism further includes: an adjusting member;

[0012] The adjusting member is movably installed in or on the first positioning member, and the adjusting member has a mounting hole adapted to the second positioning member; or,

[0013] The adjusting member is movably installed in or on the second positioning member, and the adjusting member is provided with a mounting hole matched with the first positioning member.

[0014] In a possible implementation manner, the first positioning member and the second positioning member are plug-connected, welded, bolted, or snap-fitted.

[0015] In a possible implementation, the first positioning member is a positioning hole, and the second positioning member is a positioning pin;

[0016] Alternatively, the first positioning member is a positioning pin, and the second positioning member is a positioning hole.

[0017] In a possible implementation, the adjusting member is movably mounted on the positioning hole, and the positioning pin passes through the positioning hole and is fixed in the mounting hole of the adjusting member.

[0018] In a possible implementation, the first positioning member is a socket, and the second positioning member is an insert block;

[0019] Alternatively, the first positioning member is a socket, and the second positioning member is an insert block.

[0020] In a possible implementation, the adjusting member includes: an adjusting body movably located inside the plug hole, and the adjusting body has the mounting hole;

[0021] The fixing body connected to the end of the adjusting body is used to fix the adjusting body inside the insertion hole.

[0022] In a possible implementation, the positioning mechanism further includes: a reinforcing support having two ends respectively connected to the two side supports.

[0023] In a possible implementation, the positioning mechanism further includes: a positioning support connected to the frame and located between the side support and the frame;

[0024] The thickness of the positioning support is adjustable.

[0025] In a possible implementation, the positioning mechanism further includes:

[0026] A load-relief support connected to the frame and located between the side support and the frame, wherein the thickness of the load-relief support is adjustable;

[0027] The unloading support is provided with a rolling element, and the rolling element is used to form rolling friction with the side support.

[0028] On the other hand, a radiotherapy device is provided, the radiotherapy device comprising: any one of the above-mentioned positioning mechanisms;

[0029] A radiation head connected to a side support of the positioning mechanism;

[0030] A frame is connected to the first positioning member on the top support through the second positioning member of the positioning mechanism.

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

[0032] The positioning mechanism provided in the embodiment of the present invention can be used for the installation and positioning of the radiation head in the radiotherapy device. When used, the two sides of the radiation head are connected to the side supports of the positioning mechanism, and then the whole is placed in the installation position of the frame of the radiotherapy device for installation, wherein a second positioning member is arranged on the top of the frame, and firstly, the first positioning member on the top support is made to correspond to the second positioning member one by one, and the two cooperate to realize the positioning of the radiation head on the frame, thereby improving the installation accuracy. After the positioning is completed, the radiation head is connected to the frame to realize the fixing of the position of the radiation head on the frame. It can be seen that the positioning mechanism provided in the embodiment of the present invention can improve the installation accuracy of the radiation head, and there is no need to repeatedly disassemble and assemble the heavy radiation head during the installation process, which significantly simplifies the installation process and reduces the difficulty of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1-1 A schematic diagram of the structure of a positioning mechanism provided by an embodiment of the present invention;

[0035] Figure 1-2 A schematic structural diagram of a positioning mechanism with an adjusting member provided in an embodiment of the present invention;

[0036] Figure 1-3 A schematic diagram of another positioning mechanism provided by an embodiment of the present invention, wherein: Figure 1-3 The positioning support and unloading support are not installed on the side support, but are fitted with the side support;

[0037] Figure 2 A schematic diagram of the structure of a radiotherapy device provided by an embodiment of the present invention;

[0038] Figure 3 It is a schematic diagram of the structure of the rack;

[0039] Figure 4 A schematic diagram of the structure of a positioning support provided by an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of the working relationship between the positioning support and the side support provided in an embodiment of the present invention;

[0041] Figure 6 A schematic structural diagram of a load-relief support provided in an embodiment of the present invention.

[0042] The reference numerals represent:

[0043] 1-side support, 101-connection groove,

[0044] 2-top support, 201-first positioning member, 202-second positioning member, 203-adjusting member,

[0045] 3-positioning support, 301-first fixing block, 302-first thickness adjustment block,

[0046] 4-unloading support, 401-rolling element, 4011-fixed body, 4012-ball,

[0047] 402-second fixing block, 403-second thickness adjusting block,

[0048] 5-reinforced support, 6-through hole, 7-first driving member, 8-second driving member, 9-reinforcement block,

[0049] M-radiation head, N-frame, P-mounting side panel. DETAILED DESCRIPTION

[0050] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0051] It should be noted that, for radiotherapy equipment, its radiation head includes but is not limited to: treatment head, imaging head, etc., with the radiation head installed on the frame, and the frame has a corresponding mounting position to accommodate the radiation head. Generally, the mounting position of the frame has two mounting side panels, which are used to connect with the two sides of the radiation head (generally the guide rails on both sides). It is understandable that according to the specific radiotherapy equipment, the corresponding radiation head is named differently. For example, for a gamma knife, its radiation head is called a focusing treatment head, and for a linear accelerator, its radiation head is an accelerator treatment head.

[0052] Based on the above structure of the radiation head and the frame, the embodiment of the present invention provides a positioning mechanism that facilitates the installation and positioning of the radiation head. The structure is summarized as follows:

[0053] On the one hand, an embodiment of the present invention provides a positioning mechanism, as shown in the attached Figure 1-1 And attached Figure 3As shown, the positioning mechanism includes: two side supports 1 respectively connected to the two sides of the radiation head M of the radiotherapy equipment; a top support 2 connected to the top of the side support 1; a first positioning member 201 located on the top support 2; and a second positioning member 202 located on the top of the frame N of the radiotherapy equipment, wherein the first positioning member 201 corresponds to the second positioning member 202 one by one.

[0054] The positioning mechanism provided in the embodiment of the present invention can be used for the installation and positioning of the radiation head M in the radiotherapy device. When used, the two sides of the radiation head M are connected to the side supports 1 of the positioning mechanism, and then the whole is placed in the installation position of the frame N of the radiotherapy device for installation, wherein a second positioning member 202 is arranged on the top of the frame N, and firstly, the first positioning member 201 on the top support 2 corresponds to the second positioning member 202 one by one, and the two cooperate to realize the position positioning of the radiation head M on the frame N, thereby improving the installation accuracy. After the positioning is completed, the radiation head M is connected to the frame N to realize the position fixing of the radiation head M on the frame N. It can be seen that the use of the positioning mechanism provided in the embodiment of the present invention can improve the installation accuracy of the radiation head M, and there is no need to repeatedly disassemble and assemble the heavy radiation head M during the installation process, which significantly simplifies the installation process and reduces the difficulty of installation.

[0055] The number of the first positioning members 201 on the same top support 2 may be more than one, for example, two, three, etc. It is understandable that the number of the second positioning members 202 is the same as the number of the first positioning members 201 .

[0056] As mentioned above, the radiation head M is positioned during installation by the first positioning member 201 corresponding to the second positioning member 202. The positioning methods between the two include but are not limited to: plug connection, bolt connection, welding connection, snap connection, etc. In order to achieve fast and effective connection, the plug connection can be selected. The above-mentioned connection methods are described below:

[0057] For the bolt connection, the first positioning member 201 and the second positioning member 202 can both be bolt holes. When used, the first positioning member 201 and the second positioning member 202 are connected one by one, and bolts are used to thread the two to achieve effective positioning.

[0058] For the welding connection method, the first positioning member 201 and the second positioning member 202 can both be indicators. When used, the first positioning member 201 and the second positioning member 202 are overlapped one by one, and then the top support 2 is welded to the top of the frame N to achieve effective positioning.

[0059] For the snap-fit ​​connection, the first positioning member 201 may be a slot, and the second positioning member 202 may be a clamp. When used, the second positioning member 202 is inserted into the first positioning member 201 to achieve effective positioning.

[0060] The plug-in connection method has the advantages of simple, fast and reliable positioning. As an example, the first positioning member 201 is a socket and the second positioning member 202 is a plug. Of course, it does not rule out the situation where the first positioning member 201 is a plug and the second positioning member 202 is a socket.

[0061] Generally, the structure of the plug block is adapted to the socket. For example, when the socket is a circular hole, the plug block is a cylindrical block; when the socket is a diamond-shaped hole, the plug block is a diamond-shaped column.

[0062] As another example, the first positioning member 201 is a positioning hole, and the second positioning member 202 is a positioning pin;

[0063] Alternatively, the first positioning member 201 is a positioning pin, and the second positioning member 202 is a positioning hole.

[0064] The outer contour of the plug (or positioning pin) can be exactly matched with the inner contour of the plug hole (or positioning hole) to achieve a stable positioning effect. The outer contour volume of the plug (or positioning pin) can also be smaller than the inner contour volume of the plug hole (or positioning hole). For example, the radial width of the plug hole (or positioning hole) can be larger than the radial width of the plug (or positioning pin). In this case, as shown in the attached figure, Figure 1-2 As shown, in the embodiment of the present disclosure, the top of the rack N can be used to support the top support 2, that is, when used, the top support 2 can be made to fit the top wall of the rack N.

[0065] Furthermore, as attached Figure 1-2 As shown, the positioning mechanism provided in the embodiment of the present disclosure further includes: an adjusting member 203, wherein the adjusting member 203 is movably mounted in or on the first positioning member 201, and the adjusting member 203 has a mounting hole adapted to the second positioning member 202. Or,

[0066] The adjusting member 203 is movably installed in or on the second positioning member 202 , and the adjusting member 203 has a mounting hole adapted to the first positioning member 201 .

[0067] By making the adjustment member 203 movable in or on one of the positioning members, the position of the radiation head M on the rack N can be further appropriately adjusted to ensure a higher installation accuracy. By providing a mounting hole on the adjustment member 203 to match with another positioning member, the relative fixation between the first positioning member 201 and the second positioning member 202 can be achieved.

[0068] For example, when the first positioning member 201 and the second positioning member 202 are matched in the form of plug-in connection between a socket and an insert block, the adjusting member 203 may include: an adjusting body movably located inside the socket, the adjusting body having a mounting hole; and a fixing body connected to the end of the adjusting body, for fixing the adjusting body inside the socket.

[0069] The position of the radiation head M on the rack N is finally adjusted by adjusting the body to move in the socket. After the above positional relationship is determined, the adjustment member 203 is fixed relative to the inside of the socket by the fixing body, thereby ensuring that the radiation head M is fixed relative to the rack N.

[0070] The fixing body may be a plate-like structure surrounding the end of the adjusting body. In this case, the fixing body may be fixed to the top support by screws so that the adjusting member 203 is fixed relative to the insertion hole.

[0071] For example, when the first positioning member 201 and the second positioning member 202 are matching positioning holes and positioning pins, the adjusting member 203 can be movably mounted on the positioning holes, and the positioning pin passes through the positioning holes and is fixed in the mounting hole of the adjusting member 203. Figure 1-2 As shown, the adjusting member 203 may be plate-shaped and may be mounted on the plate surface around the positioning hole by means of screws or the like.

[0072] As can be seen from the above, the two side supports 1 can be separated and relatively independent. In order to simplify the structure of the positioning mechanism and increase its strength, as shown in the attached Figure 1-1 As shown, the positioning mechanism further includes: a reinforcing support 5 with two ends respectively connected to the two side supports 1 .

[0073] For example, the reinforcing support 5 may be a connecting rod structure, and may be provided as one or two, with both ends respectively connected to the same side ends of the two side supports 1 .

[0074] Furthermore, the length of the reinforcing support 5 can be made adjustable so that the positioning mechanism can adapt to radiation heads M of various specifications.

[0075] As mentioned above, after the radiation head M is accurately positioned relative to the rack N, the radiation head M is conventionally fastened to the rack N. Generally, the guide rail of the radiation head M is connected to the mounting side plate P of the rack N by connecting screws. The second positioning member 202 can be disposed on the top of the mounting side plate P.

[0076] Considering that in the application state, the side support 1 is clamped between the guide rail and the mounting side plate P, Figure 4 As shown, the side support 1 has a through hole 6 for allowing the connecting screws of the frame N and the radiation head M to pass through.

[0077] The side support 1 can be used to connect with the guide rails on both sides of the radiation head M. According to the shape of the guide rails, a connection groove that matches the shape of the guide rails can be set on the side support 1. Generally, the guide rails on both sides of the radiation head M are semi-circular arc-shaped. In this case, a semi-circular arc-shaped connection groove 101 can be set on the side support 1, and the guide rails are inserted into the connection groove 101 for preliminary positioning, and then fasteners, such as screws, are used for connection. Such a setting is conducive to improving the connection strength and simplifying the connection difficulty.

[0078] Furthermore, as attached Figure 1-3 As shown, the positioning mechanism provided in the embodiment of the present invention further includes: a positioning support 3 connected to the frame N and located between the side support 1 and the frame N; the thickness of the positioning support 3 is adjustable.

[0079] During application, after the radiation head M and the rack N are precisely positioned by the first positioning member 201 and the second positioning member 202, the radiation head M is preliminarily installed on the rack N. Since the positioning support 3 is connected to the rack N, the positioning support 3 is located between the side support 1 and the rack N. The thickness of the positioning support 3 is adjusted until the installation gap between the side support 1 and the rack N is eliminated, that is, the side support 1 and the positioning support 3 are closely attached to each other. At this time, the positioning support 3 can be used to provide lateral support for the radiation head M, effectively improving the installation rigidity of the radiation head M. Subsequently, the radiation head M can be subsequently fastened to the rack N.

[0080] Furthermore, as attached Figure 1-3 As shown, the positioning mechanism also includes: a unloading support 4 connected to the frame N and located between the side support 1 and the frame N, the thickness of the unloading support 4 is adjustable; a rolling member 401 is provided on the unloading support 4, and the rolling member 401 is used to form rolling friction with the side support 1.

[0081] The unloading support 4 and the positioning support 3 cooperate and can be used for the disassembly and reinstallation process of the radiation head M. When the radiation head M is disassembled, the frame N is rotated so that the radiation head M is located on the side of the frame N (that is, the central axis of the radiation head M extends in the horizontal direction). First, the preliminary positioning of the frame N and the radiation head M is released. Then, the thickness of the positioning support 3 located between the frame N and the radiation head M is adjusted until the installation gap between the side support 1 and the frame N is restored, that is, the positioning support 3 and the side support 1 have a gap to facilitate disassembly. Then, the thickness of the unloading support 4 located between the frame N and the radiation head M is adjusted to eliminate the installation gap between the side support 1 and the frame N, and the unloading support 4 is used to provide lateral support for the radiation head M so that it maintains a good positioning relative to the frame N (this process is equivalent to switching the positioning support 3 to the unloading support 4). Since the unloading support 4 has a rolling member 401, the rolling member 401 is used to form rolling friction with the side support 1. Based on the rolling friction, after releasing the fastening connection between the radiation head M and the rack N, the radiation head M can be smoothly pulled out of the rack N using the radiation head disassembly tool (it can be understood that the radiation head M and the side support 1 and the top support 2 connected thereto are pulled out of the rack N together). When the radiation head M is reinstalled, it only needs to return to the original path and switch the unloading support 4 to the positioning support 3 to ensure the installation accuracy of the reinstalled radiation head M.

[0082] It can be seen that by switching the positioning support 3 and the unloading support 4, the installation state of the radiation head M (the positioning support 3 is in effect) can be switched to the disassembly state (the unloading support 4 is in effect). Through the above switching, it can be ensured that the radiation head M always maintains good installation accuracy when it is disassembled and then installed. Under the premise of maintaining the installation accuracy, the radiation head M is disassembled from the frame N, thereby making various operations on the radiation head M, such as component maintenance and source replacement, more convenient and feasible, which is of great significance for reducing the volume and cost of radiotherapy equipment and effectively improving product competitiveness.

[0083] The positioning support 3 and the unloading support 4 can be connected to the mounting side plate P of the rack N. In the embodiment of the present invention, the positioning support 3 can effectively improve the rigidity of the radiation head M during installation, and provide stable lateral support for the radiation head M when in use. In order to achieve adjustable thickness of the positioning support 3, the following is an overview of its applicable structure:

[0084] For example, as shown in the attached Figure 4 As shown, the positioning support 3 includes: a first fixing block 301 connected to the frame N, for example, its mounting side plate P; and a first thickness adjustment block 302 sliding relative to the first fixing block 301. Figure 2 As shown, the installation mechanism further includes: a first driving member 7 for driving the first thickness adjustment block 302 to slide bidirectionally.

[0085] During application, the first fixed block 301 can be fixedly connected to the mounting side plate P of the frame N, and the first thickness adjustment block 302 and the first fixed block 301 form a sliding pair. The first thickness adjustment block 302 is driven by the first driving member 7 to slide bidirectionally along the first fixed block 301, so as to increase or decrease the thickness of the positioning support 3, thereby achieving the purpose of eliminating or restoring the installation gap between the side support 1 and the mounting side plate P of the frame N.

[0086] For the sliding of the first thickness adjustment block 302 relative to the first fixed block 301, matching slide grooves and slide rails can be provided on the contact surfaces of the two. For example, a slide rail can be provided on the first thickness adjustment block 302, and a slide groove can be provided on the first fixed block 301. The above relative sliding is achieved through the cooperation of the slide rail and the slide groove. It can be understood that the length of the slide groove is greater than the length of the slide rail, so as to facilitate the bidirectional sliding of the first thickness adjustment block 302.

[0087] In particular, considering that the first fixing block 301 is closely fitted with the mounting side plate P of the rack N, and the first thickness adjustment block 302 needs to be closely fitted with the side support 1 (see the attached Figure 5 ), when the side support 1 is a flat plate structure, it is expected that the surface of the first thickness adjustment block 302 that is in contact with it is also a flat surface. In this way, in order to achieve the purpose of thickness change when the first thickness adjustment block 302 slides in both directions (for example, sliding up and down), it is also possible to ensure that the first fixing block 301 and the first thickness adjustment block 302 are always in close contact with each other. In the embodiment of the present invention, as shown in the attached Figure 4 As shown, the first fixing block 301 and the first thickness adjustment block 302 are adapted wedge-shaped blocks, so that the first thickness adjustment block 302 can be wedged tightly with the side support 1 to form a lateral support.

[0088] For example, the first fixing block 301 may be a wedge-shaped block with a rectangular profile, and its thickness may gradually decrease from the top to the bottom, and the first thickness adjustment block 302 may also be a wedge-shaped block with a rectangular profile, and its thickness may gradually increase from the top to the bottom. In other words, the contact surfaces of the first fixing block 301 and the first thickness adjustment block 302 are matching inclined surfaces.

[0089] As mentioned above, the first driving member 7 is used to drive the bidirectional sliding of the first thickness adjustment block 302. As an example, the first driving member 7 can be threadedly connected to the first thickness adjustment block 302. By rotating the first driving member 7 in situ and changing the rotation direction, the bidirectional sliding of the first thickness adjustment block 302 can be achieved.

[0090] The first driving member 7 can be limited on the top support 2 to ensure in-situ rotation. For example, the first driving member 7 can be a bolt, which can pass through the top support 2 and be threadedly connected to the first thickness adjustment block 302, and based on the limiting effect of its head, it can always be limited on the top support 2, so as to achieve the purpose of being able to rotate but not being able to move axially. At the same time, when the bolt is used, it can keep the position of the first thickness adjustment block 302 unchanged, ensuring that the side support 1 and the mounting side plate P of the frame N are always in a wedged state.

[0091] Furthermore, a reinforcement block 9 may be provided on the top support 2, so that the first driving member 7 passes through the reinforcement block 9 and the top support 2 at the same time to be threadedly connected with the first thickness adjustment block 302, thereby increasing the strength at the connection position. The reinforcement block 9 may be a plate-like structure.

[0092] The unloading support 4 may be located on both mounting side plates P of the rack N, or may be located on only one of the mounting side plates P. Considering that being located on only one side may also achieve a good unloading effect, in an embodiment of the present invention, the unloading support 4 may be disposed only on the mounting side plate P on one side of the rack N.

[0093] As mentioned above, the unloading support 4 is used to provide lateral support to the radiation head M when it is disassembled. In order to achieve adjustable thickness of the unloading support 4, the applicable structure is summarized as follows:

[0094] For example, as shown in the attached Figure 6 As shown, the unloading support 4 includes: a second fixing block 402 connected to the frame N, for example, the mounting side plate P thereof; and a second thickness adjusting block 403 sliding relative to the second fixing block 402. The rolling element 401 is located on the second thickness adjusting block 403.

[0095] Furthermore, the installation mechanism also includes: a second driving member 8 for driving the second thickness adjustment block 403 to slide bidirectionally.

[0096] During application, the second fixed block 402 can be fixedly connected to the mounting side plate P of the frame N, and the second thickness adjustment block 403 and the second fixed block 402 form a sliding pair. The second thickness adjustment block 403 is driven by the second driving member 8 to slide bidirectionally along the second fixed block 402, so as to increase or decrease the thickness of the unloading support 4, thereby achieving the purpose of eliminating or restoring the gap between the side support 1 and the mounting side plate P of the frame N.

[0097] The relative sliding manner between the second thickness adjustment block 403 and the second fixed block 402 can refer to the above description of the first thickness adjustment block 302 and the first fixed block 301, which will not be repeated here. In addition, the second fixed block 402 and the second thickness adjustment block 403 can also be compatible wedge blocks.

[0098] The second driving member 8 is threadedly connected to the second thickness adjustment block 403 to achieve the purpose of bidirectional sliding of the second thickness adjustment block 403. For example, the second driving member 8 can also be a bolt.

[0099] Similarly, the second driving member 8 can also pass through the reinforcing block 9 and the top support 2 to be threadedly connected with the second thickness adjustment block 403 to increase the strength at the connection position. In this way, the unloading support 4 can be arranged adjacent to the positioning support 3 on the same side.

[0100] In the embodiment of the present invention, the rolling element 401 is used to form rolling friction with the side support 1. As an example, the rolling element 401 includes: a fixed body 4011 fixed to the second thickness adjustment block 403, and a plurality of balls 4012 rotatably arranged on the fixed body 4011. The rolling friction is formed with the side support 1 through the balls 4012. It can be understood that the structure of the rolling element 401 can refer to the structure of an abacus, and will not be described in detail here.

[0101] In order to optimize the functions of the positioning support 3 and the unloading support 4, multiple positioning supports 3 and unloading supports 4 can be set at the same time. In a possible implementation, multiple positioning supports 3 can be set on the mounting side plate P on each side of the rack N, for example, 2 or 3 (see Figure 1-3 ), 4, etc. At the same time, multiple unloading supports 4, such as 2 or 3 (see Figure 1-3 ) or 4, etc.

[0102] On the other hand, an embodiment of the present invention further provides a radiotherapy device, the radiotherapy device comprising: any one of the positioning mechanisms provided in the embodiments of the present invention;

[0103] A radiation head connected to the side support;

[0104] The frame is connected with the first positioning member on the top support through the second positioning member of the positioning mechanism.

[0105] Regarding the radiotherapy equipment provided above, the installation and removal process of its radiation head is described below:

[0106] Installation of the radiation head:

[0107] First, connect the first fixed block of the positioning support of the positioning mechanism to the mounting side plate of the rack, connect the two side supports of the positioning mechanism to the guide rails on both sides of the radiation head, and then position the top support and the top of the mounting side plate of the rack through the first positioning piece and the second positioning piece to achieve the preliminary installation of the radiation head on the rack.

[0108] The first thickness adjustment block is driven to move by the first driving member to increase the thickness of the positioning support until the installation gap between the side support and the mounting side plate of the frame is eliminated, that is, the first thickness adjustment block is wedged with the side support, and the positioning support is used to provide lateral support for the focused radiation head, so that the focused radiation head can be accurately positioned relative to the frame. Then, the guide rail of the focused radiation head is fastened to the mounting side plate of the frame using connecting screws. The above installation process can achieve good installation accuracy and ensure that the multiple radiation sources on the focused radiation head are always focused on the isocenter.

[0109] Disassembly of the radiation head:

[0110] The rotating rack bracket drives the rack to rotate so that the radiation head is located on the side of the rack (that is, the central axis of the radiation head extends in the horizontal direction). Remove the pins on the top of the mounting side plate to release the initial positioning of the rack and the radiation head.

[0111] The first thickness adjustment block is driven by the first driving member to move in the opposite direction, so that the thickness of the positioning support is reduced until the installation gap between the side support and the mounting side plate of the frame is restored, that is, the first thickness adjustment block is separated from the side support to facilitate disassembly. Subsequently, the thickness of the unloading support located between the mounting side plate of the frame and the guide rail of the focusing radiation head is adjusted, specifically, the second thickness adjustment block is driven by the second driving member to slide along the second fixed block, so that the thickness of the unloading support is increased to eliminate the gap between the side support and the mounting side plate of the frame (that is, the second thickness adjustment block is wedged with the side support), and the unloading support is used to provide lateral support for the focusing radiation head so that it maintains a good positioning relative to the frame (this process is equivalent to switching the side support to the unloading support). Since there is a rolling member on the unloading support, the rolling member is used to form rolling friction with the side support. Based on the above rolling friction, after releasing the fastening connection between the focusing radiation head and the frame, the radiation head can be smoothly pulled out of the frame using the radiation head disassembly tool (it can be understood that the radiation head is pulled out of the frame together with the side support and the top support of the positioning mechanism). When the radiation head is reinstalled, it is only necessary to return to the original path and switch the unloading support to the side support to ensure the installation accuracy of the reinstalled radiation head.

[0112] The radiation head disassembly tool and the operation process of disassembling and assembling the radiation head are common in the art, and the following examples are given to illustrate:

[0113] The base of the radiation head disassembly tool is fixed on the foundation on the side of the rack and is reliably connected to the foundation by screws. The radiation head disassembly tool has three orthogonal linear motions for adjusting the posture of the radiation head. The radiation head disassembly tool is connected to the rack to keep the rack balanced during the disassembly process. The horizontal guide rail on the radiation head disassembly tool extends under the guide rail of the radiation head inside the rack.

[0114] During the disassembly process, the height of the radiation head disassembly tool is adjusted so that the upper horizontal guide rail is close to the guide rail of the radiation head, and the radiation head is lifted together with the unloading support. The horizontal screw on the radiation head disassembly tool is fixed by the adapter plate and the guide rail of the radiation head. By manually cranking the horizontal screw, the radiation head can be moved out of the rack in the horizontal direction.

[0115] The above description is only for the purpose of facilitating those skilled in the art to understand the technical solution of the present invention 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 in the protection scope of the present invention.

Claims

1. A positioning mechanism, characterized in that: The positioning mechanism comprises: two side supports (1) respectively connected to two sides of the radiation head (M); A top support (2) connected to the top of the side support (1); A first positioning member (201) located on the top support (2); A second positioning member (202) located on the top of the frame (N); The first positioning member (201) corresponds to the second positioning member (202) one by one; The positioning mechanism further comprises: a positioning support (3) connected to the frame (N) and located between the side support (1) and the frame (N); The thickness of the positioning support (3) is adjustable; There are multiple first positioning members (201) located on the top support (2), and the number of the second positioning members (202) is the same as the number of the first positioning members (201).

2. The positioning mechanism according to claim 1, characterized in that: The positioning mechanism further comprises: an adjusting member (203); The adjusting member (203) is movably mounted in the first positioning member (201) or on the first positioning member (201), and the adjusting member (203) has a mounting hole adapted to the second positioning member (202); or, The adjusting member (203) is movably installed in the second positioning member (202) or on the second positioning member (202), and the adjusting member (203) has a mounting hole adapted to the first positioning member (201).

3. The positioning mechanism according to claim 2, characterized in that: The first positioning member (201) and the second positioning member (202) are plug-connected, welded, bolted, or snap-fitted.

4. The positioning mechanism according to claim 3, characterized in that: The first positioning member (201) is a positioning hole, and the second positioning member (202) is a positioning pin; Alternatively, the first positioning member (201) is a positioning pin, and the second positioning member (202) is a positioning hole.

5. The positioning mechanism according to claim 4, characterized in that: The adjusting member (203) is movably mounted on the positioning hole, and the positioning pin passes through the positioning hole and is fixed in the mounting hole of the adjusting member (203).

6. The positioning mechanism according to claim 3, characterized in that: The first positioning member (201) is a plug hole, and the second positioning member (202) is an insert block; Alternatively, the first positioning member (201) is an insert block, and the second positioning member (202) is a socket.

7. The positioning mechanism according to claim 6, characterized in that: The adjusting member (203) comprises: an adjusting body movably located inside the plug hole, and the adjusting body is provided with the mounting hole; The fixing body connected to the end of the adjusting body is used to fix the adjusting body inside the insertion hole.

8. The positioning mechanism according to claim 1, characterized in that: The positioning mechanism further comprises: a reinforcing support (5) with two ends respectively connected to the two side supports (1).

9. The positioning mechanism according to claim 8, characterized in that: The positioning mechanism also includes: A load-relief support (4) connected to the frame (N) and located between the side support (1) and the frame (N), wherein the thickness of the load-relief support (4) is adjustable; The unloading support (4) is provided with a rolling element (401), and the rolling element (401) is used to form rolling friction with the side support (1).

10. A radiotherapy device, characterized in that: The radiotherapy device comprises: the positioning mechanism according to any one of claims 1 to 9; A radiation head connected to a side support of the positioning mechanism; A frame is connected to the first positioning member on the top support through the second positioning member of the positioning mechanism.

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