Lead hinge driving device for beam limiting device and beam limiting device

Abstract

The utility model provides a lead page driving device for a beam limiting device and the beam limiting device, the lead page driving device comprises a slide rail and a lead page assembly located on one side of the slide rail, and the lead page assembly comprises two lead pages which are symmetrically arranged; the lower surface of the lead hinge is connected with a sheet metal part, and a connecting part of the sheet metal part is connected with a sliding block located on the sliding rail through a screw so as to guide movement of the lead hinge. A U-shaped limiting block is arranged on the side, close to the lead hinge, of the sliding rail, a U-shaped opening of the limiting block faces the sliding block and is attached to the side wall of the sliding block, and meanwhile the limiting block is further connected with the lower surface of the connecting part through a screw. The limiting block can fix the sheet metal part for the second time, can well prevent relative displacement of the sliding block and the sheet metal part, and avoids the problem of deflection of the lead page during movement, that is, the opening and closing edge of the lead page is limited to be always kept vertical to the sliding rail, so that the gap of the lead page is adjusted more accurately, and timely and effective control over the X-ray imaging function is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to radiodiagnosis equipment technical field especially is related to a lead page drive arrangement and beam limiting device for beam limiting device. BACKGROUND

[0002] The beam limiting device is a kind of electromechanical optical device installed in the front of X-ray tube assembly tube cover output window, its main function is to control the illumination field of X-ray tube output line, so that under the premise of satisfying X-ray imaging and diagnosis, the projection range is reduced as far as possible, unnecessary dose is avoided;And can absorb some scattered rays, improve image definition.In medical diagnosis, the beam limiting device can limit the radiation range of X-ray in space to protect the health of examinee, and prevent X-ray radiation from polluting the surrounding environment.

[0003] The beam limiting device uses lead page to control the size of the light field of X-ray, and a beam limiting device contains multiple groups of lead pages, and a single group of lead pages includes two pieces of lead pages located in the same plane, and the radiation range is adjusted by controlling the gap between the two pieces of lead pages.For electric beam limiting device, the opening and closing of lead page are generally driven by motor, and the lead page is moved by motor, and by appropriately controlling the forward rotation, reverse rotation and running time of motor, the illumination range can be adjusted to the required size.In the process of lead page movement, the moving direction of lead page needs to be limited by guide rail, and the guide rail is provided with sliding block, and the sliding block is fixedly connected with the sheet metal part of lead page, so that the lead page moves along the length direction of guide rail.However, in the existing design, the sliding block is only connected with the sheet metal part of lead page by screw, and the lead page is prone to deflection when moving due to assembly error or screw loosening, especially at the start-stop moment of motor, due to inertia, the lead page will produce slight relative displacement with the sliding block, leading to small-angle deflection of the lead page, which finally affects the adjustment accuracy of lead page gap, causing problems such as loose lead page.

[0004] Therefore, it is necessary to design a limiting component to solve the deflection and shaking problems of lead page during movement. UTILITY MODEL CONTENTS

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a lead page drive arrangement for beam limiting device, the lead page drive arrangement includes slide rail and lead page assembly located on the same side of slide rail, the lead page assembly includes two pieces of lead pages located in the same plane and symmetrically arranged:

[0006] The lower surface of the lead page is connected with sheet metal part, the sheet metal part has connecting portion protruding from the outer edge of lead page, the lower surface of connecting portion is connected with sliding block by screw, and the sliding block is located on the slide rail, one side of the slide rail close to lead page is provided with U-shaped limiting block, the U-shaped opening of limiting block faces sliding block and is fitted with the side wall of sliding block, and the limiting block and the lower surface of connecting portion are connected by screw;

[0007] The upper surface of the limiting block has at least one square protrusion capable of being filled into a square through hole provided in the connecting portion.

[0008] Optionally, the two lead leaves of the lead leaf assembly have mutually approaching opening and closing edges, which are perpendicular to the direction of the slide rail.

[0009] Optionally, the U-shaped opening of the limiting block has a bottom contact surface and side contact surfaces opposite to each other, the bottom contact surface is fitted with the side wall surface of the slide block parallel to the slide rail, and the side contact surfaces are fitted with the side wall surface of the slide block perpendicular to the slide rail.

[0010] Optionally, the thickness of the limiting block is the same as the thickness of the slide block, and the upper surface of the limiting block is flush with the upper surface of the slide block.

[0011] Optionally, the upper surface of the connecting portion of the sheet metal part is fixed with a rack, and the rack is arranged parallel to the slide rail.

[0012] Optionally, the racks connected by the two lead leaves of the lead leaf assembly are engaged with the driving gears of the same motor, so that the two lead leaves move towards or away from each other along the slide rail.

[0013] The utility model also provides a limiting device, the limiting device includes the lead leaf driving device.

[0014] Optionally, the number of the lead leaf driving devices is two sets, the lead leaves of the two sets of lead leaf driving devices are arranged in parallel, and the slide rails of the two sets of lead leaf driving devices are perpendicular to each other.

[0015] As described above, the utility model provides a lead leaf driving device for limiting device and limiting device, the lead leaf driving device includes slide rail and lead leaf assembly on the same side of slide rail, and the lead leaf assembly includes two symmetrical lead leaves, the lower surface of lead leaf is connected with sheet metal part, and the connecting portion of sheet metal part is connected with slide block on slide rail through screw, so as to provide the guidance of lead leaf movement. The side of slide rail close to lead leaf is equipped with U-shaped limiting block, the U-shaped opening of limiting block faces slide block and is fitted with the side wall of slide block, and simultaneously limiting block is also connected with the lower surface of connecting portion through screw. The limiting block can be fixed twice to sheet metal part, can prevent the relative displacement of slide block and sheet metal part well, avoids the deflection problem of lead leaf when moving, that is, the opening and closing edges of lead leaf always keep perpendicular state with slide rail, so as to adjust the lead leaf gap more accurately, and ensure the timely and effective control of X-ray imaging function. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is shown that the lead leaf driving device overall structure schematic diagram in the utility model embodiment one.

[0017] Figure 2 Figure 2 is an enlarged structural schematic view of the sliding block and the limiting block shown in Figure 1.

[0018] Element number explanation

[0019] Lead sheet 11; rack 12; motor 13; connecting portion 101; limiting block 102; sliding block 103; sliding rail 104; square-shaped protruding block 105; square-shaped through hole 106; screw 107; screw 108; bottom contact surface 1021; side contact surface 1022. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail with specific examples. Those skilled in the art can easily understand other advantages and functions of the present application from the content disclosed in the specification. The present application can also be implemented or applied in other different embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application.

[0021] It should be noted that the diagrams provided in the embodiments only schematically illustrate the basic concept of the present application, and thus the diagrams only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be randomly changed, and the layout pattern of the components can be more complex.

[0022] Embodiment one

[0023] As shown in Figures 1 and 2, the present embodiment provides a lead sheet driving device for a beam limiter, which comprises a sliding rail 104 and a lead sheet assembly located on the same side of the sliding rail. The lead sheet assembly comprises two pieces of lead sheet 11 located on the same plane and symmetrically arranged. Figure 1 Figure 2 The lower surface of the lead sheet 11 is connected with a sheet metal part, which has a connecting portion 101 protruding from the outer edge of the lead sheet. The lower surface of the connecting portion 101 is connected with a sliding block 103 through a screw, and the sliding block 103 is located on the sliding rail 104 to provide guidance for the movement of the lead sheet 11. The two pieces of lead sheet 11 have opening and closing edges close to each other, and the opening and closing edges are perpendicular to the direction of the sliding rail.

[0024] The sliding rail 104 is provided with a U-shaped limiting block 102 close to the lead sheet. The U-shaped opening of the limiting block 102 faces the sliding block 103 and is fitted with the side wall of the sliding block 103. The limiting block 102 and the lower surface of the connecting portion 101 are connected through a screw.

[0025] The sliding rail 104 is provided with a U-shaped limiting block 102 close to the lead sheet. The U-shaped opening of the limiting block 102 faces the sliding block 103 and is fitted with the side wall of the sliding block 103. The limiting block 102 and the lower surface of the connecting portion 101 are connected through a screw.

[0026] ​More specifically, the U-shaped opening of the limiting block 102 has a bottom contact surface 1021 and side contact surfaces 1022 opposite to each other, the bottom contact surface 1021 is in close contact with the side wall surface of the sliding block parallel to the sliding rail, and the side contact surfaces 1022 are in close contact with the side wall surface of the sliding block perpendicular to the sliding rail. The bottom contact surface and the side contact surface need to be designed according to the side wall surface of the sliding block to ensure the close contact. The thickness of the limiting block 102 is the same as the thickness of the sliding block 103, and the upper surface of the limiting block 102 is flush with the upper surface of the sliding block 103, so that both are in close contact with the connecting part.

[0027] The U-shaped opening of the limiting block is clamped and in close contact with the sliding block, and the limiting block is also fixedly connected with the sheet metal part, which is equivalent to a secondary fixation of the sheet metal part, which can well prevent the relative displacement of the sliding block and the sheet metal part, avoid the deflection problem of the lead page during movement, that is, limit the opening and closing edges of the lead page to always maintain a vertical state with the sliding rail, thereby more accurately adjusting the lead page gap. At the same time, the limiting block also supports the lower surface of the sheet metal part, reduces the up-down swing amplitude of the tail end of the lead page, as a reinforcing structure, it can also prevent damage to the beam limiter under extreme working conditions such as packaging and transportation. Limited by the internal space of the beam limiter, it is not possible to add a full-wrapped limiting structure at the connection between the sliding block and the connecting part, and considering that the displacement of the lead page is mainly the deflection along the sliding rail direction, therefore, only adding a limiting block to the lower surface of the sheet metal part can solve the problem without making too many changes to the existing structure.

[0028] As an example, the lower surface of the connecting part 101 and the sliding block 103 are connected by 4 M2x5 screws 108, and the limiting block 102 and the lower surface of the connecting part 101 are connected by 2 M3x6 screws 107. It should be understood that the number and type of screws are not limited to this, and can be flexibly selected according to actual conditions.

[0029] Further, the upper surface of the limiting block 102 has at least one square protrusion 105, which can be filled into the square through hole 106 provided in the connecting part 101. The cooperation of the square protrusion 105 and the square through hole 106 can further limit the sheet metal part and eliminate the deflection problem of the lead page during movement.

[0030] Further, the upper surface of the sheet metal connecting part 101 is fixed with a rack 12, and the rack 12 is arranged parallel to the sliding rail 104, so as to drive the synchronous movement of the sheet metal part and the lead page through the rack.

[0031] Further, the two racks 12 connected by the two lead pages 11 are engaged with the driving gear of the same motor 13, so that the two lead pages 11 move towards or away from each other along the sliding rail, realizing opening and closing and adjusting the radiation range.

[0032] Embodiment two

[0033] Based on the limiting component in embodiment one, the embodiment provides a beam limiter, which comprises the lead page driving device in embodiment one. As an example, the number of the lead page driving device is two sets, the lead pages of the two sets of lead page driving devices are arranged in parallel, and the sliding rails of the two sets of lead page driving devices are perpendicular to each other, so as to shield X-rays in the horizontal and vertical directions.

[0034] In summary, the lead page driving device for the beam limiter and the beam limiter are provided, which comprises a sliding rail and a lead page assembly located on the same side of the sliding rail, the lead page assembly comprises two symmetrical lead pages; the lower surface of the lead page is connected with a sheet metal part, the connecting part of the sheet metal part is connected with the sliding block on the sliding rail through a screw, so as to provide the guidance of the lead page movement. The side of the sliding rail close to the lead page is provided with a U-shaped limiting block, the U-shaped opening of the limiting block faces the sliding block and is fitted with the side wall of the sliding block, and the limiting block is also connected with the lower surface of the connecting part through a screw. The limiting block can fix the sheet metal part again, which can prevent the relative displacement of the sliding block and the sheet metal part, avoid the deflection problem of the lead page during movement, that is, limit the opening and closing edges of the lead page to keep perpendicular with the sliding rail at all times, so as to more accurately adjust the lead page gap and ensure the timely and effective control of the X-ray imaging function.

[0035] The above embodiments only exemplarily illustrate the principles and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A lead leaf drive for a collimator, characterized by, The lead page driving device comprises a slide rail and a lead page assembly located on the same side of the slide rail, the lead page assembly comprises two pieces of lead pages located on the same plane and symmetrically arranged; The lower surface of the lead page is connected with a sheet metal part, the sheet metal part has a connecting part protruding from the outer edge of the lead page, the lower surface of the connecting part is connected with a sliding block on the slide rail through a screw, the slide rail is provided with a U-shaped limiting block on the side close to the lead page, the U-shaped opening of the limiting block faces the sliding block and is fitted with the side wall of the sliding block, and the limiting block and the lower surface of the connecting part are connected through a screw; The upper surface of the limiting block has at least one square protrusion, and the square protrusion can be filled into the square through hole provided in the connecting part.

2. A lead leaf drive for a collimator according to claim 1, characterised in that: The two pieces of lead pages of the lead page assembly have opening and closing edges close to each other, and the opening and closing edges are perpendicular to the direction of the slide rail.

3. A lead leaf drive for a collimator according to claim 1, characterised in that: The U-shaped opening of the limiting block has a bottom contact surface and opposite side contact surfaces, the bottom contact surface is fitted with the side wall surface of the sliding block parallel to the slide rail, and the side contact surfaces are fitted with the side wall surface of the sliding block perpendicular to the slide rail.

4. A lead leaf drive for a collimator according to claim 1, characterised in that: The thickness of the limiting block is the same as the thickness of the sliding block, and the upper surface of the limiting block is flush with the upper surface of the sliding block.

5. A lead leaf drive for a collimator according to claim 1, wherein: The upper surface of the connecting part of the sheet metal part is fixed with a rack, and the rack is arranged parallel to the slide rail.

6. A lead leaf drive for a collimator according to claim 5, characterised in that: The racks connected by the two pieces of lead pages of the lead page assembly are engaged with the driving gears of the same motor, so that the two pieces of lead pages move towards or away from each other along the slide rail.

7. A beam stop, characterized by: The lead page driving device comprises a slide rail and a lead page assembly located on the same side of the slide rail, the lead page assembly comprises two pieces of lead pages located on the same plane and symmetrically arranged; 8. The beam stop of claim 7, wherein: The number of the lead page driving devices is two, the lead pages of the two sets of lead page driving devices are arranged in parallel, and the slide rails of the two sets of lead page driving devices are perpendicular to each other.

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