Beam limiting device

Abstract

The utility model discloses a beam limiting device, which relates to the technical field of beam limiting devices, and comprises a bottom plate, a filtering assembly, a mounting rack, a shading assembly, a mainboard assembly, a light assembly and a shell, the filtering assembly and the mounting rack are both mounted on the bottom plate, the shading assembly, the mainboard assembly and the light assembly are all mounted on the mounting rack, and the shell is fixedly arranged on the bottom plate; the main board assembly comprises a mounting plate fixedly connected to the mounting frame, four moving frames are arranged on the mounting plate in a sliding mode, two moving frames are arranged on the surface of one side of the mounting plate and can slide in the X direction, the other two moving frames are arranged on the surface of the other side of the mounting plate and can slide in the Y direction, and a lead page is fixedly installed in each moving frame; according to the beam limiting device, the movement mode of the lead page is changed, the lead page is driven by the motor to independently and continuously move in four directions, and remote control over the X-ray light field and independent and continuous movement in four directions are achieved. By adding the internal filtering assembly, the filtering of different aluminum equivalents can be remotely controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of collimators, and particularly relates to a collimator. Background Technique

[0002] An X-ray generating device is a device that can generate X-rays for clinical diagnosis. The X-ray generating device mainly consists of a high-voltage generator, an X-ray tube, and a collimator. The collimator is usually arranged under the X-ray tube, and the X-rays emitted by the X-ray tube are irradiated onto the object to be examined through the collimator. The collimator, also known as a "beam stopper", "light reducer", or "beam limiter", is used to limit the irradiation range of the X-rays emitted from the X-ray tube, so as to minimize the dose of X-rays received by the object to be examined. The collimator generally includes a bottom plate, an additional filtration assembly, a light-shielding cylinder assembly, a main board assembly, a positioning lamp, and a housing. The main board assembly is used to control the size of the opening of the collimator, thereby determining the irradiation range of the X-rays.

[0003] Now, with the development of the imaging system, it is required that the collimator can limit the lead sheets for X-rays to move independently and continuously in four directions according to the system program on the premise of ensuring a large light field and high protection. At the same time, it is also required that the size of the light field can be remotely controlled and different aluminum equivalent filtrations can be achieved. The old collimator can only make the lead sheets move relatively, and cannot move independently and continuously, nor can it remotely control different aluminum equivalent filtrations. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a collimator. Through structural design of the old collimator, on the premise of ensuring the protection and large light field of the collimator, the relative movement of the lead sheets in a single direction is changed, and an additional built-in filtration is added to realize remote control of different aluminum equivalent filtrations.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: A collimator includes a bottom plate, a filtration component, a mounting rack, a light-shielding component, a main board component, a lighting component, and a housing. The filtration component and the mounting rack are both installed on the bottom plate. The light-shielding component, the main board component, and the lighting component are all installed on the mounting rack. The housing is fixedly arranged on the bottom plate;

[0006] The main board component includes a mounting plate fixedly connected to the mounting rack. Four moving racks are slidably arranged on the mounting plate. Two of the moving racks are placed on one side surface of the mounting plate and can slide along the X direction. The other two moving racks are placed on the other side surface of the mounting plate and can slide along the Y direction. A lead sheet is fixedly installed in each moving rack. The sliding of the four moving racks is separately controlled by four driving components. An optocoupler one capable of detecting the position of the moving rack is fixedly arranged on the mounting plate;

[0007] The light-shielding component includes a light-shielding cylinder fixedly connected to the mounting bracket. A pair of rotating shafts are rotatably arranged on both side walls of the light-shielding cylinder. Lenses are fixedly arranged on the pair of rotating shafts. A set screw is installed outside the light-shielding cylinder to limit the rotation of the rotating shafts.

[0008] Preferably, the driving component includes a first motor fixedly arranged on the mounting plate. A driving pulley is fixedly arranged at the driving end of the first motor. A driven pulley is rotatably arranged on the mounting plate. A synchronous belt is wound around the driving pulley and the driven pulley. The moving bracket is fixedly connected to one side of the synchronous belt through a connecting piece.

[0009] Preferably, the lighting component includes a fixing plate fixedly arranged on the mounting bracket. A lighting lamp is fixedly arranged on one side of the fixing plate. A heat sink is also fixedly arranged on the fixing plate. The light emitted by the lighting lamp can irradiate onto the lens.

[0010] Preferably, the filtering component includes a filtering gear rotatably arranged on the bottom plate. A plurality of filtering sheets are arranged on the filtering gear. A second motor capable of driving the filtering gear to rotate is fixedly arranged on the bottom plate. An optocoupler two capable of detecting the position of the filtering gear is also fixedly arranged on the bottom plate.

[0011] Preferably, a circuit board is fixedly arranged on the mounting bracket.

[0012] Preferably, a socket is fixedly arranged on the bottom plate. A hanging plate capable of rotating is installed inside the socket. A pressing plate capable of lapping on the hanging plate is installed on the socket. A protection plate is fixedly arranged inside the hanging plate on the bottom plate. A threaded ejector rod is screwed onto the socket. One end of the threaded ejector rod can abut against the side wall of the hanging plate.

[0013] Preferably, a control panel is arranged on one side wall of the housing. A keypad, an encoder, and a display screen are arranged on the control panel.

[0014] Advantageous Effects

[0015] The present utility model provides a beam limiter, which has the following advantageous effects: Through a new structural design, while ensuring the protection of the light-shielding cylinder, the movement mode of the lead sheet is changed. The lead sheet is driven by a stepping motor to move independently and continuously in 4 directions, realizing remote control of the X-ray light field and independent and continuous movement in 4 directions. By adding an internal filtering component and driving it by a motor, remote control of different aluminum equivalent filtrations is realized. Description of the Drawings

[0016] Figure 1 It is the front view internal structure diagram of the present utility model;

[0017] Figure 2Isometric view of the main board assembly Figure 1 ;

[0018] Figure 3 Isometric view of the main board assembly Figure 2 ;

[0019] Figure 4 Isometric view of the light-shielding component;

[0020] Figure 5 Isometric view of the lighting component;

[0021] Figure 6 Front view of the lighting component;

[0022] Figure 7 Isometric view of the filtration component;

[0023] Figure 8 Isometric view of the mounting bracket;

[0024] Figure 9 Isometric view of the bottom plate;

[0025] Figure 10 Cross-sectional view of the bottom plate;

[0026] Figure 11 Isometric view of the control panel.

[0027] In the figure:

[0028] 1. Bottom plate; 1-1. Connecting ring; 1-2. Hanging plate; 1-3. Pressure plate; 1-4. Protective plate; 1-5. Threaded ejector rod;

[0029] 2. Filtration component; 2-1. Filtration gear; 2-2. Filtration sheet; 2-3. Motor 2; 2-4. Opto-coupler 2;

[0030] 3. Mounting bracket; 3-1. Circuit board;

[0031] 4. Light-shielding component; 4-1. Light-shielding cylinder; 4-2. Rotating shaft; 4-3. Lens; 4-4. Set screw;

[0032] 5. Main board assembly; 5-1. Mounting plate; 5-2. Guide rail; 5-3. Moving frame; 5-4. Lead sheet; 5-5. Motor 1; 5-6. Driving pulley; 5-7. Driven pulley; 5-8. Timing belt; 5-9. Connector; 5-10. Opto-coupler 1;

[0033] 6. Lighting component; 6-1. Fixed plate; 6-2. Lighting lamp; 6-3. Heat sink;

[0034] 7. Housing; 7-1. Control panel; 7-2. Keypad; 7-3. Encoder; 7-4. Display screen. Detailed implementation method

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0036] Please refer to Figures 1-11 , the present utility model provides a technical solution: a beam limiter, including a bottom plate 1, a filtering component 2, a mounting bracket 3, a light-shielding component 4, a main board component 5, a lighting component 6, and a housing 7. The filtering component 2 and the mounting bracket 3 are both mounted on the bottom plate 1, and the light-shielding component 4, the main board component 5, and the lighting component 6 are all mounted on the mounting bracket 3. The housing 7 is fixedly arranged on the bottom plate 1;

[0037] The main board component 5 includes a mounting plate 5-1 fixedly connected to the mounting bracket 3. Four moving brackets 5-3 are slidably arranged on the mounting plate 5-1. Two of the moving brackets 5-3 are located on one side surface of the mounting plate 5-1 and can slide along the X direction, and the other two moving brackets 5-3 are located on the other side surface of the mounting plate 5-1 and can slide along the Y direction. A lead sheet 5-4 is fixedly installed in each moving bracket 5-3. The sliding of the four moving brackets 5-3 is separately controlled by four driving components. An optocoupler 5-10 capable of detecting the position of the moving bracket 5-3 is fixedly arranged on the mounting plate 5-1. When the moving bracket 5-3 moves to the outermost end, it can cross the notch in the optocoupler 5-10. At this time, the lead sheet 5-4 moves to the maximum in this direction. A guide rail 5-2 for restricting the moving track of the moving bracket 5-3 is provided on the mounting plate 5-1;

[0038] The light-shielding component 4 includes a light-shielding cylinder 4-1 fixedly connected to the mounting bracket 3. A pair of rotating shafts 4-2 are rotatably arranged on both side walls of the light-shielding cylinder 4-1. A lens 4-3 is fixedly arranged on the pair of rotating shafts 4-2. A set screw 4-4 capable of restricting the rotation of the rotating shaft 4-2 is installed outside the light-shielding cylinder 4-1. The angle of the lens 4-3 can be adjusted by loosening the set screw 4-4.

[0039] As an embodiment of the present utility model, the driving component includes a motor 5-5 fixedly arranged on the mounting plate 5-1. The driving end of the motor 5-5 is fixedly provided with a driving pulley 5-6. A driven pulley 5-7 is rotatably arranged on the mounting plate 5-1. A synchronous belt 5-8 is wound around the driving pulley 5-6 and the driven pulley 5-7. The moving bracket 5-3 is fixedly connected to one side of the synchronous belt 5-8 through a connecting member 5-9. The synchronous belt 5-8 can be driven to rotate by the motor 5-5. When the synchronous belt 5-8 rotates, it can drive the moving bracket 5-3 to slide on the guide rail 5-2.

[0040] As an embodiment of the present utility model, the lighting assembly 6 includes a fixing plate 6-1 fixedly arranged on the mounting bracket 3. On one side of the fixing plate 6-1, a lighting lamp 6-2 is fixedly arranged. On the fixing plate 6-1, a heat sink 6-3 for dissipating heat from the lighting lamp 6-2 is also fixedly arranged. The light emitted by the lighting lamp 6-2 can irradiate on the lens 4-3. The lighting lamp 6-2 adopts an LED lamp, and silicone grease is smeared behind the LED lamp and it is installed on the fixing plate 6-1. When the light emitted by the lighting lamp 6-2 irradiates on the lens 4-3, it realizes the reflection of visible light to replace the X-ray irradiation range representation.

[0041] As an embodiment of the present utility model, the filtering assembly 2 includes a filtering gear 2-1 rotatably arranged on the bottom plate 1. A plurality of filtering sheets 2-2 are arranged on the filtering gear 2-1. On the bottom plate 1, a second motor 2-3 capable of driving the filtering gear 2-1 to rotate is fixedly arranged. On the bottom plate 1, an optocoupler 2-4 capable of detecting the position of the filtering gear 2-1 is also fixedly arranged.

[0042] As an embodiment of the present utility model, a circuit board 3-1 is fixedly arranged on the mounting bracket 3.

[0043] As an embodiment of the present utility model, a connection ring 1-1 is fixedly arranged on the bottom plate 1. A rotatable hanging plate 1-2 is installed inside the connection ring 1-1. A pressing plate 1-3 capable of overlapping on the hanging plate 1-2 is installed on the connection ring 1-1. A protective plate 1-4 is fixedly arranged on the bottom plate 1 inside the hanging plate 1-2. A threaded top rod 1-5 is screwed on the connection ring 1-1. One end of the threaded top rod 1-5 can abut against the side wall of the hanging plate 1-2. Tightening the threaded top rod 1-5 can fix the hanging plate 1-2 inside the connection ring 1-1, and after loosening the threaded top rod 1-5, the bottom plate 1 can be rotated.

[0044] As an embodiment of the present utility model, a control panel 7-1 is provided on one side wall of the housing 7. A key board 7-2, an encoder 7-3, and a display screen 7-4 are arranged on the control panel 7-1.

[0045] Those skilled in the art connect all the electrical components in this case to their adapted power supplies through wires, and should select a suitable controller according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of the electrical components working successively in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and no further description of the electrical control will be made.

[0046] Working principle and usage process of the present utility model: During use, connect Motor 1 and Motor 2 to the motor control system through cables. Motor 1 can control the running position of the lead page according to the number of signal pulses, and Motor 2 can drive the filtration gear to rotate according to the number of signal pulses, so as to align the filtration sheet with the corresponding material thickness with the light inlet hole of the bottom plate. When the light emitted by the lighting lamp shines on the lens, it reflects visible light, replacing the X-ray irradiation range for indication.

[0047] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A beam limiter, characterized in that: It comprises a base plate (1), a filter assembly (2), a mounting frame (3), a shading assembly (4), a mainboard assembly (5), a lighting assembly (6), and a shell (7); the filter assembly (2) and the mounting frame (3) are both mounted on the base plate (1); the shading assembly (4), the mainboard assembly (5), and the lighting assembly (6) are both mounted on the mounting frame (3); and the shell (7) is fixedly arranged on the base plate (1); The mainboard assembly (5) comprises a mounting plate (5-1) fixedly connected to the mounting frame (3); four movable frames (5-3) are slidably arranged on the mounting plate (5-1); two of the movable frames (5-3) are placed on one side surface of the mounting plate (5-1) and can slide along the X direction; the other two movable frames (5-3) are placed on the other side surface of the mounting plate (5-1) and can slide along the Y direction; a lead sheet (5-4) is fixedly installed in each of the movable frames (5-3); the sliding of the four movable frames (5-3) is controlled separately by four driving assemblies; and an optical coupler (5-10) capable of detecting the position of the movable frame (5-3) is fixedly arranged on the mounting plate (5-1); The shading assembly (4) comprises a shading cylinder (4-1) fixedly connected to the mounting frame (3), a pair of rotating shafts (4-2) are rotatably provided on the two side walls of the shading cylinder (4-1), lenses (4-3) are fixedly provided on the pair of rotating shafts (4-2), and a set screw (4-4) capable of limiting the rotation of the rotating shaft (4-2) is installed on the outer side of the shading cylinder (4-1).

2. A beam limiter according to claim 1, characterized in that: The driving assembly comprises a motor 1 (5-5) fixedly arranged on the mounting plate (5-1), a driving pulley (5-6) being fixedly arranged on the driving end of the motor 1 (5-5), a driven pulley (5-7) being rotatably arranged on the mounting plate (5-1), a synchronous belt (5-8) being wound around the driving pulley (5-6) and the driven pulley (5-7), and the moving frame (5-3) being fixedly connected to one side of the synchronous belt (5-8) via a connecting piece (5-9).

3. A beam limiter according to claim 1, characterized in that: The lighting assembly (6) comprises a fixing plate (6-1) fixedly arranged on the mounting frame (3), a lighting lamp (6-2) being fixedly arranged on one side of the fixing plate (6-1), and a heat sink (6-3) being fixedly arranged on the fixing plate (6-1), and light emitted by the lighting lamp (6-2) can be irradiated onto the lens (4-3).

4. A beam limiter according to claim 1, characterized in that: The filter assembly (2) comprises a filter gear (2-1) rotatably arranged on the bottom plate (1), a plurality of filter plates (2-2) being arranged on the filter gear (2-1), a motor (2-3) capable of driving the filter gear (2-1) to rotate being fixedly arranged on the bottom plate (1), and an optical coupler (2-4) capable of detecting the position of the filter gear (2-1) being also fixedly arranged on the bottom plate (1).

5. The beam limiter according to claim 1, characterized in that: A circuit board (3-1) is fixedly arranged on the mounting frame (3).

6. A beam limiter according to claim 1, characterized in that: A connecting ring (1-1) is fixedly arranged on the bottom plate (1), a rotatable hanging plate (1-2) is installed inside the connecting ring (1-1), a pressure plate (1-3) capable of overlapping the hanging plate (1-2) is installed on the connecting ring (1-1), a protective plate (1-4) is fixedly arranged on the bottom plate (1) and located inside the hanging plate (1-2), a threaded top rod (1-5) is screwed onto the connecting ring (1-1), and one end of the threaded top rod (1-5) can abut against the side wall of the hanging plate (1-2).

7. The beam limiter according to claim 1, characterized in that: A control panel (7-1) is provided on one side wall of the housing (7), and a keypad (7-2), an encoder (7-3) and a display screen (7-4) are provided on the control panel (7-1).

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