Key type fixing structure and patient fixing device for radiotherapy

Abstract

The utility model relates to the technical field of medical instruments, in particular to a button type fixing structure and a patient fixing device for radiotherapy, the fixing structure comprises a base, an insertion part and a button part, the insertion part is clamped with the base, the base is provided with an insertion groove, and the button part is arranged in the insertion groove. The side wall of the slot is provided with a sliding groove communicated with the slot and the outside of the base, the insertion part is connected with the slot in an inserted mode, the key part is connected with the sliding groove in a sliding mode, and the key part can stretch into the slot and eject the insertion part out of an inner cavity of the slot. According to the scheme of the utility model, the action of releasing the clamping between the base and the insertion part can be completed only by pressing the key part on the base during use, the insertion part can be automatically ejected out of the base, the operation is simple and convenient, the base can be mounted on the bottom plate at a position which can be seen by an operator, and the working efficiency is improved. Therefore, an operator can accurately press the key part to release the fixation between the base and the insertion part.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and more specifically, to a button-type fixation structure and a patient fixation device for radiotherapy. Background Technology

[0002] During radiotherapy, patients need to be immobilized on the radiotherapy bed to prevent movement that could cause deviations in the radiotherapy position. Currently, radiotherapy positioning diaphragms are commonly used for patient immobilization. These diaphragms are made of low-temperature thermoplastic sheets that can be easily shaped after softening. Their shape can be adjusted to fit the patient's body type, resulting in a better fixation effect.

[0003] Currently, the positioning diaphragm is mainly fixed to the base plate of the radiotherapy bed using snap-fit ​​connections and bolt positioning. When using bolts to connect the positioning diaphragm and the base plate, each bolt needs to be tightened individually, making the fixing method cumbersome. When using snap-fit ​​connections, the operator needs to press a lever on the snap-fit ​​to release the snap-fit ​​from the socket. To facilitate applying pressure to the lever, the snap-fit ​​is mostly located at the bottom edge of the base plate. However, the bottom edge of the base plate is a blind spot for the operator, making it difficult to accurately press the lever on the first try. The operator needs to feel around on the bottom of the base plate to find the lever's position, which also presents a cumbersome problem in releasing the snap-fit. Furthermore, when the snap-fit ​​is located at the bottom edge of the base plate, the operator cannot directly observe the unlocking state of the snap-fit ​​while pressing the lever, which can easily cause the lever to break due to excessive pressure, thus damaging the snap-fit. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies in that it is difficult to easily and conveniently fix the diaphragm to the fixed base plate of the radiotherapy bed, and to provide a button-type fixing structure and a patient fixation device for radiotherapy. The button-type fixing structure in this solution can unlock the diaphragm from the fixed base plate simply by pressing the button, which is simple and convenient to operate.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A button-type fixing structure is provided, including a base, an insertion part, and a button part. The insertion part is snapped into the base. The base is provided with a slot. The side wall of the slot is provided with a sliding groove that connects the slot and the outside of the base. The insertion part is inserted into the slot. The button part is slidably connected to the sliding groove. The button part can extend into the slot and push the insertion part out of the inner cavity of the slot.

[0007] In use, the button-type fixing structure of this utility model involves inserting the insertion part into the slot on the base, after which the insertion part and the base engage, thus fixing the base and the insertion part. To release the fixing between the base and the insertion part, the operator presses the button, causing the button to slide towards the slot within the groove until the button extends into the slot and pushes the insertion part out of the slot's inner cavity. During this process, the button automatically releases the engagement between the insertion part and the base. Once the button has pushed the insertion part out of the slot, the fixing between the insertion part and the base is released.

[0008] The insertion part of this utility model's button-type fixing structure does not have a lever. When it is necessary to release the engagement between the base and the insertion part, simply pressing the button on the base will release the engagement and automatically push the insertion part out of the base, making operation simple and convenient. Since there is no lever on the insertion part, there is no need to place the fixing structure at the bottom of the fixing plate—a blind spot for the operator—to facilitate applying pressure to the lever. The base can be installed on the base plate in a position visible to the operator, allowing the operator to accurately press the button to release the engagement between the base and the insertion part.

[0009] Further, the insertion part includes a connecting body, a first deformation groove, an insertion body, and a snap-fit ​​body. Both the insertion body and the snap-fit ​​body are located on the connecting body. The insertion body is positioned beside the snap-fit ​​body, and the first deformation groove is located between the insertion body and the snap-fit ​​body. The snap-fit ​​body snaps into the base. The button can extend into the slot and push the snap-fit ​​body to bend it under force. Bending the snap-fit ​​body releases the snap-fit ​​between the snap-fit ​​body and the base. When the snap-fit ​​between the snap-fit ​​body and the base is released, the button can push the snap-fit ​​body out of the slot's cavity. The ejection of the snap-fit ​​body causes the insertion body to extend out of the slot along with it. There are two first deformation grooves and two insertion bodies, so that each side of the snap-fit ​​body has a first deformation groove and an insertion body. The first deformation groove facilitates the snap-fit ​​body bending and deforming under the pushing force of the button, thereby releasing the snap-fit ​​between the snap-fit ​​body and the base. There are two first deformation grooves, which makes it easier for the main body to deform under force. Operators can release the locking between the main body and the base by pressing the button with less force, making it easier for operators to use.

[0010] Furthermore, the snap-fit ​​body has a groove, and the side wall of the slot cavity has a protrusion. The protrusion can extend into the groove and engage with it. To facilitate the button part smoothly ejecting the insertion part from the slot cavity, the protrusion and the slide groove need to be located on the same side of the slot. On a plane parallel to both the slot axis and the slide groove axis, the cross-section of the protrusion is a right-angled triangle or a right-angled trapezoid. The right-angled side of the protrusion cross-section is the end where the protrusion connects to the slot cavity; the right-angled base of the protrusion cross-section is the end where the protrusion engages with the groove; the inclined side of the protrusion is located on the inclined side of the protrusion, which can guide the insertion part entering the slot cavity, making it easier for the insertion part to smoothly insert into the slot cavity until the groove on the insertion part engages with the protrusion in the slot.

[0011] Furthermore, the snap-fit ​​body has a first inclined surface that abuts against the button portion. The bottom of the first inclined surface slopes away from the slide groove. The button portion has a second inclined surface that fits against the first inclined surface. The first inclined surface allows the button portion to abut against the first inclined surface on the snap-fit ​​body after it extends into the slot. As the button portion continues to extend into the slot, the pushing force exerted by the button portion on the snap-fit ​​body is decomposed by the first inclined surface into an upward component along the slide groove axis and a component along the slot axis. The component along the slot axis can push the snap-fit ​​body to bend, causing the groove on the snap-fit ​​body to disengage from the protrusion on the inner side wall of the slot. The upward component along the slide groove axis can push the snap-fit ​​body out of the slot. When the insertion portion is inserted into the slot, after the first inclined surface on the insertion portion abuts against the second inclined surface, the insertion portion continues to move downward. Similarly, the second inclined surface decomposes the thrust of the insertion part into an outward component force along the axis of the slide groove. This component force pushes the button part to slide outward within the slide groove until the button part returns to its original position. Furthermore, the second inclined surface on the button part facilitates better contact between the button part and the first inclined surface on the insertion part, allowing the button part to better push the insertion body to deform, thereby releasing the engagement between the protrusion and the groove and pushing the insertion part out of the slot. This design eliminates the need for springs or other metal components to drive the button part to return to its original position. The entire fixing structure is made of plastic, avoiding the reflection of radiation from metal materials during proton therapy, which could affect the treatment effect.

[0012] Furthermore, there are two slide grooves, each containing a button portion slidably connected to it. The two slide grooves are located on opposite sides of the protrusion. The arrangement of two button portions allows pressure to be applied simultaneously to both sides of the locking body when the button portion is pushed, resulting in more even force distribution and better deformation of the locking body.

[0013] Furthermore, it also includes a button cap, with one end of the button portion away from the insertion portion fixedly connected to the button cap. The base is provided with a receiving groove, and the button cap portion is located in the receiving groove and slidably connected to the receiving groove. After the button cap is provided, the operator can drive the two button bodies to move synchronously when the button cap is pressed. At the same time, the setting of the button cap can increase the contact area between the operator's fingers and the button portion, making it easier for the operator to use.

[0014] Furthermore, the end of the snap-fit ​​body connected to the connecting body is provided with a second deformation groove, the axis of which is perpendicular to the axis of the first deformation groove. The second deformation groove reduces the thickness at the connection point between the snap-fit ​​body and the connecting body, allowing the operator to deform the snap-fit ​​body with less force, thus facilitating its use.

[0015] Furthermore, the axis of the slot is an inclined straight line, and the angle between the axis of the slot and the horizontal plane is 30°-75°. When the fixing structure is installed on the base plate of the radiotherapy bed, the axis of the slot is inclined away from the center of the base plate. When the button-type fixing structure of this solution is used to fix the patient's chest and abdomen on the radiotherapy bed, the patient's breathing will cause the chest and abdomen to rise and fall. The rise and fall of the patient's chest and abdomen will push the diaphragm. Because the pushing force is relatively large, the diaphragm will increase the tension on the insertion part after being pushed, which can easily cause the insertion part to break off from the base, damaging the fixing structure and preventing the diaphragm from being fixed to the base plate. After the slot is set as an inclined slot, after the insertion part is inserted into the slot, the force of the diaphragm pulling the insertion part will be decomposed into a component force along the slot axis and a component force perpendicular to the slot axis. At this time, the tension on the insertion part along the slot axis is smaller, which can prevent the rise and fall of the patient's chest and abdomen from causing the insertion part in the fixing structure to break off from the base, and prevent the diaphragm from falling off the base plate and failing to fix the patient. Tests have shown that when the angle between the slot axis and the horizontal plane is 30°-75°, it is more effective in preventing the diaphragm from pulling the insertion part and causing it to break off from the base, resulting in the best fixing effect. An angle of 30°-75° between the slot axis and the horizontal plane corresponds to an angle of 15°-60° between the slot axis and the vertical direction.

[0016] This solution also provides a patient fixation device for radiotherapy, including a base plate and a fixation structure. The fixation structure is a push-button type fixation structure as described above, and the base is mounted on the base plate. The diaphragm edge strip for fixing the patient is connected to the insertion part, and the connection is generally detachable to facilitate replacement of the diaphragm edge strip.

[0017] The radiotherapy fixation device of this solution uses the above-mentioned fixation structure to fix the membrane frame to the base plate. The membrane frame can be unlocked by simply pressing the button in the fixation structure, which is simple and convenient to operate.

[0018] Furthermore, the base plate is provided with a head and neck support for supporting the patient's head and neck, and the fixing structure is fixedly connected to the head and neck support. Several fixing structures are fixed to the head and neck support, arranged linearly along the edges of the head and neck support. When the base of the fixing structure is installed on the head and neck support, its base is embedded in the edge of the base plate, so that the side surface of the base is flush with the side surface of the base plate, and the top surface of the base is flush with the top surface of the base plate.

[0019] Furthermore, the base plate is provided with a torso section for supporting the patient's body, and the fixing device can slide along the edge strip of the torso section. The torso section has a guide groove and a locking mechanism for fixing the fixing structure to the torso section. The guide groove is located on the edge strip of the torso section, and the base has a limiting part that slides with the guide groove. The locking mechanism is fixedly installed on the base. The edge strip of the torso section is where it connects to the diaphragm. Several fixing structures are installed on the torso section, and these fixing structures are arranged linearly along the edge line of the torso section. The base can slide along the guide groove, making the position of the fixing structure adjustable, which facilitates adjusting the position of the diaphragm on the base plate according to the patient's actual condition.

[0020] Furthermore, the body section's edge strip is provided with several positioning holes arranged linearly along the axis of the guide groove. The locking mechanism includes a positioning part that can extend into the positioning hole, and the positioning part can slide within the base. The locking mechanism also includes a cam, which is rotatably connected to the base. The cam has a handle that can drive the cam to rotate. The bottom of the positioning part has an abutment plate that can abut against the cam. The positioning part is fixedly mounted on the abutment plate, and the positioning part and the abutment plate can slide within the base. When the cam is rotated so that the larger diameter of the cam abuts against the abutment plate, the cam can push the positioning part out of the base, and the positioning part extends into the positioning hole, thus fixing the base to the body section. Similarly, when the smaller diameter of the cam abuts against the abutment plate, the positioning part does not extend into the positioning hole, and the base can slide along the guide groove. The positioning holes can be set on the top, side, or bottom surface of the base plate edge strip. The position of the positioning part in the locking mechanism matches the position of the positioning hole.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] The insertion part of this utility model's button-type fixing structure does not have a lever. When it is necessary to release the engagement between the base and the insertion part, simply pressing the button on the base will release the engagement and automatically push the insertion part out of the base, making operation simple and convenient. Furthermore, this utility model's fixing structure allows the base to be mounted on the base plate in a position visible to the operator, enabling the operator to accurately press the button to release the engagement between the base and the insertion part.

[0023] The radiotherapy fixation device of this invention uses the above-mentioned fixation structure to fix the membrane frame to the base plate. The membrane frame can be unlocked from the fixation structure simply by pressing the button in the fixation structure. The operation is simple and convenient. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a button-type fixing structure;

[0025] Figure 2 A schematic diagram of a button part and a button cap with a button-type fixed structure;

[0026] Figure 3 A schematic diagram of the insertion part of a button-type fixing structure;

[0027] Figure 4 This is a schematic diagram of the insertion part of a button-type fixing structure from another angle.

[0028] Figure 5 A schematic diagram of a base with a button-type fixing structure;

[0029] Figure 6 This is a schematic diagram of a base with a button-type fixing structure from another angle.

[0030] Figure 7 This is a schematic diagram of the internal structure of a button-type fixing structure when the protrusion and groove are engaged.

[0031] Figure 8 This is a schematic diagram of the internal structure of a button-type fixing structure when the first inclined surface and the second inclined surface are in contact.

[0032] Figure 9 This is a schematic diagram of a third embodiment of a button-type fixing structure;

[0033] Figure 10 A schematic diagram of a patient fixation device for radiotherapy;

[0034] Figure 11 This is a schematic diagram of a patient fixation device for radiotherapy from another angle.

[0035] Figure 12 for Figure 11 Enlarged view of part A;

[0036] Figure 13 This is a schematic diagram of the locking mechanism of a patient fixation device for radiotherapy.

[0037] The components are as follows: 1. Base; 2. Insertion part; 3. Button part; 4. Groove; 5. Protrusion; 6. Button cap; 7. Base plate; 8. Diaphragm frame; 9. Positioning part; 10. Cam; 11. Abutting plate; 12. Handle; 101. Slot; 102. Slide groove; 103. Receiving groove; 104. Limiting part; 201. Connecting body; 202. First deformation groove; 203. Insertion body; 204. Snap-fit ​​body; 241. First inclined surface; 242. Second deformation groove; 301. Second inclined surface; 701. Head and neck; 702. Body part; 721. Guide groove; 722. Positioning hole. Detailed Implementation

[0038] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0039] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0040] Example 1

[0041] This embodiment is a first embodiment of a button-type fixing structure, such as... Figures 1-8 As shown, it includes a base 1, an insertion part 2, and a button part 3, with the insertion part 2 engaging with the base 1. Figure 5 As shown, the base 1 is provided with a slot 101, and the side wall of the slot 101 is provided with a sliding groove 102 that connects the slot 101 and the outside of the base 1. The insertion part 2 is inserted into the slot 101, and the button part 3 is slidably connected to the sliding groove 102. The button part 3 can extend into the slot 101 and push the insertion part 2 out from the inner cavity of the slot 101.

[0042] Specifically, such as Figure 3As shown, the insertion part 2 includes a connecting body 201, a first deformation groove 202, an insertion body 203, and a snap-fit ​​body 204. Both the insertion body 203 and the snap-fit ​​body 204 are located on the connecting body 201. The insertion body 203 is located beside the snap-fit ​​body 204, and the first deformation groove 202 is located between the insertion body 203 and the snap-fit ​​body 204. The snap-fit ​​body 204 snaps into the base 1. The button part 3 can extend into the slot 101 and push the snap-fit ​​body 204 to bend it. After bending, the snap-fit ​​body 204 can release the snap-fit ​​between itself and the base 1. When the snap-fit ​​between the snap-fit ​​body 204 and the base 1 is released, the button part 3 can push the snap-fit ​​body 204 out of the cavity of the slot 101. The ejection of the snap-fit ​​body 204 can cause the insertion body 203 to extend out of the slot 101 together. There are two first deformation grooves 202 and two insertion bodies 203. The two sides of the snap-fit ​​body 204 are respectively provided with a first deformation groove 202 and an insertion body 203.

[0043] Specifically, the snap-fit ​​body 204 has a groove 4, and the side wall of the inner cavity of the slot 101 has a protrusion 5. The protrusion 5 and the slide groove 102 are located on the same side of the slot 101, and the protrusion 5 can extend into the groove 4 and snap-fit ​​with the groove 4. Figure 6 As shown, on a plane parallel to both the axis of slot 101 and the axis of slide 102, the cross-section of protrusion 5 is a right-angled triangle or a right-angled trapezoid. The right-angled side of the cross-section of protrusion 5 is the end connecting protrusion 5 to the inner cavity of slot 101; the right-angled base of the cross-section of protrusion 5 is the end where protrusion 5 engages with groove 4; the inclined side of protrusion 5 is located on its inclined side, which guides the insertion part 2 entering the inner cavity of slot 101, facilitating smooth insertion of the insertion part 2 into the inner cavity of slot 101 until the groove 4 on the insertion part 2 engages with the protrusion 5 inside slot 101.

[0044] Specifically, the snap-fit ​​body 204 is provided with a first inclined surface 241 that can abut against the button part 3. The bottom of the first inclined surface 241 is inclined away from the slide groove 102. The button part 3 is provided with a second inclined surface 301 that can fit against the first inclined surface 241.

[0045] The working principle or process of this embodiment is as follows:

[0046] In use, the insertion part 2 is inserted into the slot 101 on the base 1. During insertion, the insertion body 203 and the engaging body 204 of the insertion part 2 extend into the slot 101 until the engaging body 204 abuts against the inclined sidewall of the protrusion 5 within the slot 101. As the insertion part 2 continues to be inserted, the engaging body 204 continues to move downwards along the inclined plane of the protrusion 5. At this time, the protrusion 5 pushes the engaging body 204 to deform through the inclined plane, allowing the engaging body 204 to continue to be smoothly inserted downwards until the protrusion 5 engages with the groove 4 on the engaging body 204, thus completing the fixation between the base 1 and the insertion part 2. Figure 7 As shown. Simultaneously, during the process of inserting the insertion part 2 into the slot 101, as... Figure 8 As shown, after the first inclined surface 241 on the insertion part 2 comes into contact with the second inclined surface 301, the insertion part 2 continues to move downward. The second inclined surface 301 decomposes the thrust of the insertion part 2 to obtain a component force that moves outward along the axis of the slide groove 102. This component force pushes the button part 3 to slide outward in the slide groove until the protrusion 5 engages with the groove 4 on the locking body 204. At this time, the button part 3 protrudes out of the slide groove 102.

[0047] When it is necessary to release the fixation between the base 1 and the insertion part 2, the operator presses the button part 3, causing the button part 3 to slide in the slide groove 102 towards the slot 101 until the button part 3 extends into the slot 101 and abuts against the first inclined surface 241 at the bottom of the locking body 204. Figure 8 As shown, as the button part 3 continues to extend, the button part 3 pushes the locking body 204 through the first inclined surface 241. The first inclined surface 241 decomposes the pushing force of the button part 3 into a horizontal pushing force and a vertical pushing force. The horizontal pushing force can push the locking body 204 to bend and deform away from the protrusion 5 until the protrusion 5 and the groove 4 are released from the locking. The vertical pushing force can push the locking body 204 out of the slot 101. That is, when the groove 4 and the protrusion 5 are released from the locking, the locking body 204 is pushed out of the slot 101.

[0048] The beneficial effects of this embodiment are as follows:

[0049] In this embodiment, the insertion part 2 of the button-type fixing structure does not have a lever. When it is necessary to release the connection between the base 1 and the insertion part 2, simply pressing the button 3 on the base 1 is sufficient to release the connection between the base 1 and the insertion part 2, and the insertion part 2 will automatically be pushed out of the base 1. The operation is simple and convenient. Since there is no lever on the insertion part 2, it is unnecessary to place the fixing structure at the bottom of the fixing base plate 7, which is in a blind spot for the operator, in order to facilitate applying pressure to the lever. The base 1 can be installed on the base plate 7 in a position that the operator can see, so that the operator can accurately press the button 3 to release the connection between the base 1 and the insertion part 2.

[0050] The first deformation groove 202 facilitates the deformation and bending of the locking body 204 after receiving the pushing force from the button part 3, thus smoothly releasing the locking body 204 from the base 1. There are two first deformation grooves 202, allowing the operator to release the locking body 204 from the base 1 with less force when pressing the button part 3, making it easier for the operator to use. The first inclined surface 241 and the second inclined surface 301 further facilitate the release of the engagement between the protrusion 5 and the groove 4 when the button part 3 pushes the locking body 204, and pushes the locking body 204 out of the slot 101.

[0051] Example 2

[0052] This embodiment is a second embodiment of a button-type fixing structure, such as... Figures 2-6 As shown, this embodiment further defines the fixing structure based on embodiment one.

[0053] Specifically, there are two slides 102, and each slide 102 has a button part 3 slidably connected inside it. The two slides 102 are located on both sides of the protrusion 5.

[0054] Specifically, it also includes a button cap 6. The end of the button part 3 away from the insertion part 2 is fixedly connected to the button cap 6. The base 1 shown is provided with a receiving groove 103. The button cap 6 is located in the receiving groove 103 and is slidably connected to the receiving groove 103.

[0055] Specifically, such as Figure 4 As shown, the end of the snap-fit ​​body 204 connected to the connecting body 201 is also provided with a second deformation groove 242, and the axis of the second deformation groove 242 is perpendicular to the axis of the first deformation groove 202.

[0056] The beneficial effects of this embodiment are as follows:

[0057] The two button sections 3 allow pressure to be applied simultaneously to both sides of the locking body 204 when the button section 3 is pushed, resulting in more even force distribution and better deformation of the locking body 204. With the button cap 6, pressing the button cap 6 drives the two button bodies to move synchronously. The button cap 6 also increases the contact area between the operator's fingers and the button section 3, making it easier for the operator to use. The second deformation groove 242 reduces the thickness at the connection between the locking body 204 and the connecting body 201, allowing the operator to deform the locking body 204 with less force, further facilitating operation.

[0058] Example 3

[0059] This embodiment is a third embodiment of a button-type fixing structure. This embodiment is based on Embodiments 1 and 2, such as... Figure 9 As shown, the slot 101 on the base 1 is further defined.

[0060] Specifically, the axis of slot 101 is an inclined straight line, and the angle between the axis of slot 101 and the horizontal plane is 30°-75°. When the fixing structure is installed on the base plate 7 of the radiotherapy bed, the axis of slot 101 is inclined away from the center of the base plate 7.

[0061] The beneficial effects of this embodiment are as follows:

[0062] After the slot 101 is set as an inclined slot, when the insertion part 2 is inserted into the slot 101, the force of the diaphragm pulling the insertion part 2 will be decomposed into a component force along the axis of the slot 101 and a component force perpendicular to the axis of the slot 101. At this time, the tension on the insertion part 2 along the axis of the slot 101 is smaller, which can prevent the insertion part 2 in the fixation structure from breaking off from the base 1 due to the rise and fall of the patient's chest and abdomen, and prevent the diaphragm from falling off the base plate 7 and failing to fix the patient.

[0063] Example 4

[0064] This embodiment is an example of a patient fixation device for radiotherapy, such as... Figure 10 As shown, it includes a base plate 7 and a fixing structure. The fixing structure is a button-type fixing structure as described in Embodiments 1 to 3. The base 1 is mounted on the base plate 7. The insertion part 2 is detachably connected to the diaphragm frame.

[0065] The beneficial effects of this embodiment are as follows:

[0066] The radiotherapy fixation device of this embodiment uses the above-described fixation structure to fix the membrane frame to the base plate 7. The membrane frame can be unlocked from the fixation structure simply by pressing the button 3 in the fixation structure. The operation is simple and convenient.

[0067] Example 5

[0068] This embodiment is one example of a patient fixation device for radiotherapy. This embodiment is based on Embodiment 4, as follows: Figure 10 and Figure 11 As shown, the base plate 7 is further defined.

[0069] Specifically, the base plate 7 is provided with a head and neck support 701 for supporting the patient's head and neck, and a fixing structure is fixedly connected to the head and neck support 701. The fixing structure is a button-type fixing structure as described in Embodiment 2.

[0070] Specifically, there are several fixing structures fixed to the head and neck 701, and these fixing structures are arranged linearly along the edge of the head and neck 701. When the base 1 of the fixing structure is installed on the head and neck 701, the base 1 is embedded in the edge of the base plate 7, so that the side of the base 1 is flush with the side of the base plate 7, and the top surface of the base 1 is flush with the top surface of the base plate 7.

[0071] The beneficial effects of this embodiment are as follows:

[0072] When the patient's head and neck are being fixed, the patient's head and neck can be successfully fixed to the base plate 7.

[0073] Example 6

[0074] This embodiment is one example of a patient fixation device for radiotherapy, such as... Figures 10-13 As shown, this embodiment further defines the base plate 7 based on embodiments four and five.

[0075] Specifically, the base plate 7 is provided with a body part 702 for supporting the patient's body. The fixing device slides along the edge strip of the body part 702, and the fixing structure is a button-type fixing structure as described in Embodiment 3. The body part 702 is provided with a guide groove 721 and a locking mechanism that can fix the fixing structure to the body part 702. The guide groove 721 is located on the edge strip of the body part 702, such as... Figure 9 As shown, the base 1 is provided with a limiting part 104 that is slidably connected to the guide groove 721, and the locking mechanism is fixedly installed on the base 1. There are several fixing structures installed on the body part 702, and the several fixing structures are arranged linearly along the edge strip of the body part 702.

[0076] Specifically, the body part 702 has several positioning holes 722 arranged linearly along the axis of the guide groove 721 on its side strip. The locking mechanism includes a positioning part 9 that can extend into the positioning hole 722 and can slide within the base 1. The locking mechanism also includes a cam 10, which is rotatably connected to the base 1. The cam 10 has a handle 12 that can drive the cam 10 to rotate. The bottom of the positioning part 9 has an abutment plate 11 that can abut against the cam 10. The positioning part 9 is fixedly mounted on the abutment plate 11, and the positioning part 9 and the abutment plate 11 can slide within the base 1.

[0077] Specifically, the positioning hole 722 is hemispherical, and the end of the positioning part 9 that can extend into the positioning hole 722 is also hemispherical. The side strip of the body part 702 is also provided with a scale along the axial direction of the guide groove 721.

[0078] The working principle or process of this embodiment is as follows:

[0079] The operator rotates the handle 12 to drive the cam 10 to rotate within the base 1. When the cam 10 rotates to the point where its larger diameter end abuts against the abutment plate 11, the cam 10 pushes the positioning part 9 off the base 1, and the positioning part 9 extends into the positioning hole 722, thus fixing the base 1 onto the body part 702. When the cam 10 rotates to the point where its smaller diameter end abuts against the abutment plate 11, the abutment plate 11, due to its own weight, causes the positioning part 9 to fall. At this time, the positioning part 9 separates from the positioning hole 722, and the base 1 can slide on the body part 702.

[0080] The beneficial effects of this embodiment are as follows:

[0081] The guide groove 721 allows the fixing structure to slide along it, enabling adjustment of the diaphragm position on the fixing plate. Both the positioning hole 722 and the end of the positioning part 9 that extends into the positioning hole 722 are hemispherical, providing better guidance and facilitating smooth insertion of the positioning part 9 into the positioning hole 722. The graduations on the side strip of the body part 702 further facilitate adjustment of the fixing structure's position on the side strip of the body part 702.

[0082] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0083] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A button-type fixing structure, characterized in that, The device includes a base (1), an insertion part (2), and a button part (3). The insertion part (2) is engaged with the base (1). The base (1) has a slot (101). The side wall of the slot (101) has a groove (102) that connects the slot (101) and the outside of the base (1). The insertion part (2) is inserted into the slot (101). The button part (3) is slidably connected to the groove (102). The button part (3) can extend into the slot (101) and push the insertion part (2) out of the cavity of the slot (101).

2. The button-type fixing structure according to claim 1, characterized in that, The insertion part (2) includes a connecting body (201), a first deformation groove (202), an insertion body (203), and a snap-fit ​​body (204). The insertion body (203) and the snap-fit ​​body (204) are both disposed on the connecting body (201). The insertion body (203) is disposed on the side of the snap-fit ​​body (204), and the first deformation groove (202) is located between the insertion body (203) and the snap-fit ​​body (204). The snap-fit ​​body (204) snaps into the base (1).

3. The button-type fixing structure according to claim 2, characterized in that, The snap-fit ​​body (204) is provided with a groove (4), and the side wall of the inner cavity of the slot (101) is provided with a protrusion (5). The protrusion (5) can extend into the groove (4) and snap-fit ​​with the groove (4).

4. The button-type fixing structure according to claim 3, characterized in that, The snap-fit ​​body (204) is provided with a first inclined surface (241) that can abut against the button part (3). The bottom of the first inclined surface (241) is inclined away from the slide groove (102). The button part (3) is provided with a second inclined surface (301) that can fit against the first inclined surface (241).

5. A button-type fixing structure according to claim 2, characterized in that, There are two slide grooves (102), and each slide groove (102) is slidably connected to a button part (3). The two slide grooves (102) are located on both sides of the protrusion (5).

6. The button-type fixing structure according to claim 5, characterized in that, It also includes a button cap (6), one end of the button part (3) away from the insertion part (2) is fixedly connected to the button cap (6), and the base (1) is provided with a receiving groove (103), the button cap (6) is located in the receiving groove (103) and is slidably connected to the receiving groove (103).

7. A button-type fixing structure according to claim 2, characterized in that, The snap-fit ​​body (204) is further provided with a second deformation groove (242) at one end connected to the connecting body (201), and the axis of the second deformation groove (242) is perpendicular to the axis of the first deformation groove (202).

8. A button-type fixing structure according to any one of claims 1-7, characterized in that, The axis of the slot (101) is an inclined straight line, and the angle between the axis of the slot (101) and the horizontal plane is 30°-75°.

9. A patient fixation device for radiotherapy, characterized in that, It includes a base plate (7) and a fixing structure, wherein the fixing structure is a button-type fixing structure as described in any one of claims 1-8, and the base (1) is mounted on the base plate (7).

10. A patient fixation device for radiotherapy according to claim 9, characterized in that, The base plate (7) is provided with a head and neck support (701) for supporting the patient's head and neck, and the fixing structure is fixedly connected to the head and neck support (701).

11. A patient fixation device for radiotherapy according to claim 9, characterized in that, The base plate (7) is provided with a body part (702) for supporting the patient's body, and the fixing device can slide along the edge strip of the body part (702).

12. A patient fixation device for radiotherapy according to claim 11, characterized in that, The body part (702) is provided with a guide groove (721) and a locking mechanism that can fix the fixing structure on the body part (702). The guide groove (721) is located on the side strip of the body part (702). The base (1) is provided with a limiting part (104) that is slidably connected to the guide groove (721). The locking mechanism is fixedly installed on the base (1).

13. A patient fixation device for radiotherapy according to claim 12, characterized in that, The body part (702) is also provided with a plurality of positioning holes (722) arranged linearly along the axis of the guide groove (721). The locking mechanism includes a positioning part (9) that can extend into the positioning hole (722) and the positioning part (9) can slide in the base (1).

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