A radiation therapy bed

Abstract

The present invention discloses a radiotherapy bed, including a lifting device and a bed board, the lifting device includes a top platform, a plurality of guide rails are fixedly arranged on the top platform, the bed board is slidably connected to the guide rails, a plurality of cavities are provided in the bed board, a braking device is fixedly arranged in each cavity, the braking device includes a fixed plate, a braking slider is slidably arranged on the side of the fixed plate facing the top platform, a brake pad is detachably arranged on the side of the braking slider facing the top platform, a motor bracket is fixedly arranged on any side of the fixed plate, a power device is fixedly arranged on the side of the motor bracket away from the fixed plate, a braking cam is fixedly arranged on the output end of the power device, and the outer edge of the braking cam abuts against the braking slider. The purpose of the present invention is to provide a tumor radiotherapy device bed with a simple structure, a precise braking function, and adaptability to various electrical working conditions.

Description

Technical Field

[0001] The invention relates to clinical medical equipment, in particular to a radiotherapy couch. Background Art

[0002] Nowadays, the treatment for malignant tumors usually involves early removal of the tumor, and then using radiation such as x-rays, alpha rays, beta rays, gamma rays, electron beams, proton beams, etc. to irradiate the area where the malignant tumor is formed, using radiation to destroy tumor cells as much as possible, preventing the proliferation and spread of tumor cells, thereby achieving the purpose of treatment.

[0003] Since radiation not only destroys tumor cells, but also normal cells in the human body, causing damage to the human body and affecting human health, radiation therapy requires not only accurate calculation of radiation doses, but also precise staying at the radiation therapy position to damage normal cells as little as possible.

[0004] The braking device of the tumor radiotherapy bed on the current market mainly relies on the following three methods: 1. Braking by brake motor; 2. Braking by cylinder; 3. Braking by electromagnetic brake. However, none of these three braking methods can achieve precise braking for the following reasons: 1. When braking is required, direct current is passed through the stator to generate a magnetic field in the opposite direction of the rotor rotation, forcing the rotor to slow down until it stops. However, after the direct current is passed through, the rotor of the motor will still rotate to a certain extent due to inertia and will not stop immediately. Therefore, there is a certain error between the stop position and the optimal braking position; 2. Cylinder braking cannot achieve timely braking due to its complex mechanism; 3. The electromagnetic brake has a large braking volume and will generate vibration during the braking process, so there may be a certain error between the braking position and the optimal braking position. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a radiotherapy bed with a simple structure, precise braking function and the ability to adapt to a variety of electrical working conditions.

[0006] Technical solution: A radiotherapy bed described in the present invention comprises a lifting device and a bed plate, wherein the lifting device comprises a top platform, a plurality of guide rails are fixedly arranged on the top platform, the bed plate is slidably connected to the guide rails, a plurality of cavities are provided in the bed plate, a braking device is fixedly arranged in each of the cavities, the braking device comprises a fixed plate, a braking slider is slidably arranged on the side of the fixed plate facing the top platform, a brake pad is detachably arranged on the side of the brake slider facing the top platform, a motor bracket is fixedly arranged on any side of the fixed plate, a power device is fixedly arranged on the side of the motor bracket away from the fixed plate, a braking cam is fixedly arranged on the output end of the power device, and the outer edge of the braking cam abuts against the braking slider. The fixed plate is used to fix the motor bracket of the present invention, and the braking cam can be either an irregularly shaped cam or a circular wheel eccentrically connected to the output end of the power device. The shape of the braking end of the brake pad can be selectively replaced according to the shape of the guide rail.

[0007] Furthermore, a manual unlocking opening is provided on the cavity side wall of the bed board, and a fixing seat fixedly connected to the bed board is provided on the side of the fixing plate close to the manual unlocking opening. The fixing plate is rotatably connected to the fixing seat and extends in the direction of the manual unlocking opening to form an extension plate. A locking cam for locking the posture of the extension plate is rotatably provided on the side of the fixing seat close to the manual unlocking opening, and a handle is fixedly provided on the locking cam, and the handle extends out of the manual unlocking opening.

[0008] Furthermore, one end of the guide column is fixedly connected to the brake slider, and the other end of the guide column extends out of the fixing plate and is slidably connected to the fixing plate.

[0009] Furthermore, a reciprocating spring is disposed on the outer shell of the guide column, one end of the reciprocating spring is fixedly connected to the brake slider, and the other end of the reciprocating spring is fixedly connected to the fixing plate.

[0010] Furthermore, a travel switch is fixedly arranged on either side of the fixing plate, and a touch plate corresponding to the contact position of the travel switch is fixedly arranged on the brake slider. The travel switch and the touch plate are used to accurately control the braking depth of the brake pad to prevent the brake pad from locking too deeply.

[0011] Furthermore, the power device includes a brake motor and a reducer, the reducer is fixedly connected to the output end of the brake motor, and the output end of the reducer is the output end of the power device.

[0012] Furthermore, the brake pad is made of rubber.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. The present invention has a simple structure, and utilizes the two dead points of the brake cam to lock the state of the brake cam, and then lock the position of the brake pad. When braking is not required, the brake cam is located at the first dead point; when braking is required, the brake cam rotates until the second dead point, at which time the brake pad is locked with the lifting top platform, and the brake cam is immediately locked by the second dead point and will not continue to rotate, so the braking effect is sensitive; 2. The power device is only used to change the locking position of the brake pad. When the brake cam is at the first dead point or the second dead point, the power device does not need to be powered, so the energy consumption of the present invention is low; 3. The present invention is provided with a device for manually releasing the locked state, and the brake pad has a downward pressure on the top platform, so the top platform has an upward reaction force on the brake pad. When the braking state needs to be released and the power device happens to be out of power, the handle drives the locking cam to rotate so that the locking cam is separated from the extension plate, and the fixing plate drives the brake pad to rotate around the fixing seat, and finally the brake pad is released from the locked state with the top platform, so that the present invention can cope with a variety of situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereogram of the present invention.

[0015] Figure 2 It is a stereogram corresponding to the braking device and the top platform in the present invention.

[0016] Figure 3 It is a combined cross-sectional view of the braking device and the bed board in the present invention.

[0017] Figure 4 It is a three-dimensional diagram of the braking device in the present invention at one angle.

[0018] Figure 5 It is a three-dimensional diagram of the braking device of the present invention from another angle.

[0019] Figure 6 It is a schematic diagram of the braking device of the present invention when not braking.

[0020] Figure 7 It is a schematic diagram of the braking device of the present invention during braking.

[0021] Figure 8 It is a schematic diagram of the cooperation between the brake cam, the brake slider and the power device in the present invention.

[0022] Fig. 9 It is a schematic diagram of manually releasing the locking state in the present invention.

[0023] Fig.10 It is a stereoscopic diagram of manually releasing the locking state in the present invention.

[0024] Among them: 1. bed board; 101. upper bed; 102. lower bed; 2. lifting device; 201. top platform; 2011. guide rail; 202. lifting arm; 203. lifting base; 3. braking device; 4. brake motor; 5. reducer; 6. fixed plate; 7. guide column; 8. travel switch; 9. reciprocating spring; 10. brake slider; 11. brake pad; 12. touch plate; 13. brake cam; 14. handle; 15. locking cam; 16. fixed seat; 17. motor bracket. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0026] See attached Figures 1 to 10The radiotherapy bed shown in the present invention comprises a lifting device 2 and a bed board 1. The lifting device 2 is composed of a top platform 201, two cross-shaped lifting arms 202 and a lifting base 203, and two guide rails 2011 are fixedly arranged on the top platform 201; the bed board 1 is composed of an upper bed 101 and a lower bed 102, and the lower bed 102 is slidably connected to the guide rails 2011. The upper bed 101 and the lower bed 102 enclose a plurality of cavities, and a manual unlocking port is provided on the side wall of the cavity, and a brake port for the brake pad 11 to pass through is provided at the bottom of the cavity, and a brake device 3 is fixedly arranged in each cavity. The brake device 3 includes a fixed seat 16 and a fixed plate 6. The fixed seat 16 is used to fix the brake device 3 in the cavity. The fixed seat 16 is fixedly set on one side of the fixed plate 6 close to the manual unlocking port. The fixed plate 6 is rotatably connected to the fixed seat 16, and the fixed plate 6 extends in the direction of the manual unlocking port at the position where the fixed seat 16 is rotatably connected to form an extension plate. A locking cam 15 for locking the posture of the extension plate is rotatably set on one side of the fixed seat 16 close to the manual unlocking port. A handle 14 is fixedly set on the locking cam 15, and the handle 14 extends out of the manual unlocking port; a brake slider 10 is slidably set on one side of the fixed plate 6 toward the top platform 201, the bottom end of the guide column 7 is fixedly connected to the top of the brake slider 10, the top end of the guide column 7 extends out of the fixed plate 6 and is slidably connected to the fixed plate 6, and a reciprocating spring 9 is arranged on the outer shell of the guide column 7. One end of the reciprocating spring 9 is fixedly connected to the brake slider 10, and the other end of the reciprocating spring 9 is fixedly connected to the fixed plate 6. A rubber brake pad 11 is detachably provided on the side of the brake slider 10 facing the top platform 201; a motor bracket 17 is fixedly provided on any side of the fixed plate 6, and a power device is fixedly provided on the side of the motor bracket 17 away from the fixed plate 6. The power device includes a brake motor 4 and a reducer 5. The brake motor 4 is a servo motor, and the reducer 5 is a planetary reducer. The reducer 5 is fixedly connected to the output end of the brake motor 4, and a brake cam 13 is fixedly provided on the output end of the reducer 5, and the outer edge of the brake cam 13 abuts against the brake slider 10; a travel switch 8 is fixedly provided on any side of the fixed plate 6, and a touch plate 12 corresponding to the contact position of the travel switch 8 is fixedly provided on the brake slider 10.

[0027] like Figure 6 As shown, when braking is not in progress, the locking cam 15 abuts against the fixing plate 6 to maintain the locking cam 15 in position; when braking is required, the brake motor 4 drives the brake cam 13 to rotate, pushing the brake slider 10 to drive the brake pad 11 to move toward the top platform 201 until the brake cam 13 rotates to the second dead point, at which time the brake pad 11 is locked with the top platform 201. Figure 7 When the brake needs to be released, the brake motor 4 drives the brake cam 13 to rotate to the first dead point, pushing the brake slider 10 to drive the brake pad 11 to move away from the top platform 201 until the recovery state is as shown Figure 6As shown; when the brake needs to be released but the brake motor 4 cannot rotate, the handle 14 is turned to drive the locking cam 15 to release the contact between the locking cam 15 and the fixed plate 6. Since the brake pad 11 exerts downward pressure on the top platform 201 when locked, the top platform 201 has an upward reaction force on the brake pad 11. When the locking cam 15 releases the contact with the fixed plate 6, the fixed plate 6 drives the locking device to rotate, and finally the brake pad 11 is released from the locked state with the top platform 201.

Claims

1. A radiotherapy bed, comprising a lifting device (2) and a bed plate (1), wherein the lifting device (2) comprises a top platform (201), a plurality of guide rails (2011) are fixedly arranged on the top platform (201), and the bed plate (1) is slidably connected to the guide rails (2011). Features: A plurality of cavities are provided in the bed board (1), and a brake device (3) is fixedly arranged in each of the cavities. The brake device (3) comprises a fixed plate (6), a brake slider (10) is slidably arranged on the side of the fixed plate (6) facing the top platform (201), a brake pad (11) is detachably arranged on the side of the brake slider (10) facing the top platform (201), a motor bracket (17) is fixedly arranged on any side of the fixed plate (6), a power device is fixedly arranged on the side of the motor bracket (17) away from the fixed plate (6), a brake cam (13) is fixedly arranged on the output end of the power device, and the outer edge of the brake cam (13) abuts against the brake slider (10); A manual unlocking opening is provided on the side wall of the cavity of the bed board (1); a fixing seat (16) fixedly connected to the bed board (1) is arranged on a side of the fixing plate (6) close to the manual unlocking opening; the fixing plate (6) is rotatably connected to the fixing seat (16) and extends in the direction of the manual unlocking opening to form an extension plate; a locking cam (15) for locking the posture of the extension plate is rotatably arranged on a side of the fixing seat (16) close to the manual unlocking opening; a handle (14) is fixedly arranged on the locking cam (15), and the handle (14) extends out of the manual unlocking opening; A travel switch (8) is fixedly arranged on any one side of the fixed plate (6), and a touch plate (12) corresponding to the contact position of the travel switch (8) is fixedly arranged on the brake slider (10). The travel switch (8) and the touch plate (12) are used to accurately control the braking depth of the brake pad (11) to prevent the brake pad (11) from locking too deeply.

2. A radiotherapy couch according to claim 1, Features: One end of the guide column (7) is fixedly connected to the brake slider (10), and the other end of the guide column (7) extends out of the fixing plate (6) and is slidably connected to the fixing plate (6).

3. A radiotherapy couch according to claim 2, Features: A reciprocating spring (9) is disposed on the outer surface of the guide column (7), one end of the reciprocating spring (9) is fixedly connected to the brake slider (10), and the other end of the reciprocating spring (9) is fixedly connected to the fixed plate (6).

4. A radiotherapy couch according to claim 1, Features: The power device comprises a brake motor (4) and a reducer (5); the reducer (5) is fixedly connected to the output end of the brake motor (4); and the output end of the reducer (5) is the output end of the power device.

5. A radiotherapy couch according to claim 1, Features: The brake pad (11) is made of rubber.

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