X-ray photography system and telescopic device thereof

Abstract

The utility model relates to an X-ray photography system and a telescopic device thereof, the telescopic device comprises a limiting piece, a fixed joint and a plurality of telescopic joints, the fixed joint and the telescopic joints are sequentially sleeved from outside to inside, the fixed joint is used for being fixedly connected with a hanging bracket of a hanging device, and the innermost telescopic joint is used for being connected with a machine head device; the telescopic joint on the innermost side is further used for being connected with a traction mechanism of the suspension device through a traction rope; the limiting piece is located on the top end side of the telescopic joint. The limiting pieces are used for abutting against the telescopic joints, so that when the telescopic joints retract to the preset positions, the top end faces of the telescopic joints are flush with the top end face of the fixed joint at the same height in the telescopic direction. When the telescopic joints retract to the preset positions relative to the fixed joints (for example, the telescopic joints retract completely), the telescopic joints can be mechanically limited through the limiting pieces so as to reduce or eliminate the height section difference between the telescopic joints and between the telescopic joints and the fixed joints, and therefore a larger lifting range can be given to the machine head device on the premise that the number of the telescopic joints is not increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an X-ray photography system and a telescopic device thereof. BACKGROUND

[0002] A digital X-ray photography (DR) system is a device that can quickly reproduce an X-ray photography image by using an X-ray detector to collect and a computer system to process after X-rays penetrate a subject (for example, a human body). An existing suspension type X-ray photography system usually installs an X-ray head below a telescopic cylinder assembly, drives the X-ray head to move up and down by the telescopic cylinder assembly, and realizes adjustment and transformation of the position of the X-ray head.

[0003] Among them, the installation height of the X-ray head is crucial to the lifting range of the X-ray head. In the related art, the lifting range of the X-ray head is usually increased by increasing the number of telescopic cylinders, but the increase in the number of telescopic cylinders means an increase in the overall weight, cost and structural complexity of the telescopic cylinder or the device system, and also puts higher requirements on the application environment of the suspension type device system. CONTENT OF THE UTILITY MODEL

[0004] The technical problem solved by the present application is to provide a telescopic device and an X-ray photography system applying the telescopic device, which can increase the height position of the X-ray head with as few telescopic sections as possible.

[0005] According to a first aspect, an embodiment provides a telescopic device of an X-ray photography system, the telescopic device comprising a fixed section and a plurality of telescopic sections, the fixed section and the plurality of telescopic sections being sequentially sleeved from outside to inside, and one of the plurality of telescopic sections located at the innermost side being a center section; in the telescopic direction of the telescopic device, the fixed section is used for fixed connection with a hanger of a suspension device, and the center section is used for connection with a head device capable of emitting X-rays; the center section is also used for connecting a traction mechanism of the suspension device through a traction rope, so that the plurality of telescopic sections can be telescopically moved relative to the fixed section along the telescopic direction by winding and unwinding the traction rope.

[0006] Among them, the telescopic device further comprises a limiting piece, and the limiting piece is located at the top end side of the telescopic section; the limiting piece is used for abutting against the telescopic section, so that when the plurality of telescopic sections are retracted to a preset position, the top end faces of the plurality of telescopic sections and the top end face of the fixed section are in the same height in the telescopic direction.

[0007] In one embodiment, the number of limiting pieces is one, and the limiting piece is fixed to the top end of the fixed section or the hanger; wherein:

[0008] The limiting member has a limiting surface with a preset length in the inner-outer direction perpendicular to the telescopic direction, so that the limiting surface can abut against the top end surface of the telescopic sections;

[0009] Or the limiting member has a plurality of limiting surfaces corresponding to the plurality of telescopic sections, and the plurality of limiting surfaces can abut against the top end surface of the corresponding telescopic sections.

[0010] In one embodiment, the number of limiting members is set to be multiple, and the plurality of limiting members are arranged staggered in the circumferential direction around the telescopic direction, and each limiting member has a limiting surface capable of abutting against the top end surface of at least one telescopic section.

[0011] In one embodiment, one of the two adjacent telescopic sections on the outer side is an outer telescopic section, and one on the inner side is an inner telescopic section; wherein:

[0012] At least one of the plurality of limiting members is fixed to the top end of the outer telescopic section to abut against the inner telescopic section;

[0013] And / or

[0014] At least one of the plurality of limiting members is fixed to the top end of the fixed section or the hanger to abut against the inner telescopic section and / or the outer telescopic section.

[0015] In one embodiment, the fixed section and the telescopic section have the same size in the telescopic direction.

[0016] In one embodiment, the telescopic device further comprises a hoisting assembly, the hoisting assembly comprising a hoisting shaft and a hoisting seat, the hoisting seat being connected to the inside of the center section, the hoisting seat having a first connecting part and a second connecting part spaced apart from each other; the hoisting shaft movably connecting the first connecting part and the second connecting part, for sleeving the grommet structure of the traction rope;

[0017] Wherein, when the hoisting shaft is connected with the first connecting part and the second connecting part at the same time, the grommet structure can be limited between the first connecting part and the second connecting part; when at least one of the first connecting part and the second connecting part is separated from the hoisting shaft, the grommet structure can be sleeved on or removed from the hoisting shaft.

[0018] In one embodiment, the first connecting part and the second connecting part are each provided with a first plug hole for inserting both ends of the hoisting shaft;

[0019] The lifting assembly further comprises a locking member, the first connecting part and / or the second connecting part is screwed with the locking member; the locking member is used to abut the peripheral surface of the lifting shaft, so as to lock and fix the lifting shaft with the first connecting part or lock and fix the lifting shaft with the second connecting part.

[0020] In one embodiment, the lifting seat further has a third connecting part, the first connecting part and the second connecting part are protruded on the same side of the third connecting part;

[0021] The lifting assembly further comprises a fixing shaft, the center section is provided with a second insertion hole and a third insertion hole; the fixing shaft penetrates through the second connecting part, and both ends of the fixing shaft are inserted into the second insertion hole and the third insertion hole respectively, so as to limit and fix the lifting seat inside the center section.

[0022] In one embodiment, the fixing shaft has an end head part and a shaft rod part, the radial dimension of the end head part is larger than that of the shaft rod part; the shaft rod part penetrates through the third connecting part, and one end of the shaft rod part away from the end head part is inserted into the second insertion hole; the third insertion hole is a counter-sunk hole, and the end head part is accommodated in the third insertion hole;

[0023] The lifting assembly further comprises an anti-extraction member; the anti-extraction member is connected to the center section, and is used to block the end head part from the side away from the shaft rod part, so as to limit the end head part from being separated from the third insertion hole.

[0024] In one embodiment, one end of the traction rope used to be connected with the lifting shaft comprises a bending section; the bending section is fixedly connected with the main body section of the traction rope through a press joint, so as to form the loop structure.

[0025] In one embodiment, the telescopic device further comprises a synchronous assembly and an adjusting assembly matched with each other; wherein:

[0026] The synchronous assembly comprises a synchronous rope and a synchronous rope wheel; adjacent three of the fixing section and the plurality of telescopic sections are drivingly connected through the synchronous rope and the synchronous rope wheel, so that the plurality of telescopic sections can synchronously move relative to the fixing section in the telescopic direction;

[0027] The adjusting assembly comprises a fixing member and an adjusting member, the fixing member is fixed to the top end of the fixing section or the top end of the telescopic section, the adjusting member penetrates through and is screwed with the fixing member in the telescopic direction, the adjusting member has a third connecting structure, and the synchronous rope has a fourth connecting structure; the third connecting structure and the fourth connecting structure are matched and connected, so as to limit the synchronous rope and the adjusting member from being synchronously rotated, and enable the adjusting member to drive the synchronous rope to move relative to the fixing member in the telescopic direction.

[0028] In one embodiment, the third connecting structure comprises a ball groove structure and a channel structure arranged through the adjusting member along the telescopic direction, and the fourth connecting structure comprises a ball head structure arranged at the end of the synchronous rope; the synchronous rope is arranged through the channel structure to limit the ball head structure in the ball groove structure.

[0029] In one embodiment, the adjusting assembly further comprises a locking member located on the side of the fixing member away from the corresponding telescopic section or fixing section in the telescopic direction; the locking member is threadedly sleeved with the adjusting member to lock the position of the adjusting member relative to the fixing member.

[0030] In one embodiment, among the fixing section and the three adjacent telescopic sections, the outermost one is a first section, the middle one is a second section, and the innermost one is a third section; wherein:

[0031] The synchronous rope wheel is arranged at the bottom end of the second section, one end of the synchronous rope is fixed to the top end of the first section through the adjusting assembly, and the other end of the synchronous rope is fixedly connected with the top end of the third section after passing through the synchronous rope wheel.

[0032] In one embodiment, the number of telescopic sections is three, and the three telescopic sections are sequentially a first telescopic section, a second telescopic section and a third telescopic section from the outside to the inside; the number of synchronous ropes is two, and one of the two synchronous ropes is a first rope and the other is a second rope; the number of synchronous rope wheels is two, and one of the two synchronous rope wheels is a first rope wheel and the other is a second rope wheel; wherein:

[0033] The first rope wheel is arranged at the bottom end of the first telescopic section, one end of the first rope is fixed to the top end of the fixing section through the adjusting assembly, and the other end of the first rope is fixedly connected with the top end of the second telescopic section after passing through the first rope wheel;

[0034] The second rope wheel is arranged at the bottom end of the second telescopic section, one end of the second rope is fixed to the top end of the first telescopic section through the adjusting assembly, and the other end of the second rope is fixedly connected with the top end of the third telescopic section after passing through the second rope wheel.

[0035] According to a second aspect, an embodiment provides a telescopic device of an X-ray photography system, the telescopic device comprising a fixed section and a plurality of telescopic sections, the fixed section and the plurality of telescopic sections are sequentially sleeved from outside to inside, and one of the plurality of telescopic sections located at the innermost side is a central section; in a telescopic direction of the telescopic device, a top end of the fixed section is configured to be fixedly connected with a hanger of a suspension device, and the central section is configured to be connected with a head device capable of emitting X-rays; the central section is further configured to be connected with a traction mechanism of the suspension device through a traction rope, so that the plurality of telescopic sections can be telescopically moved relative to the fixed section along the telescopic direction by winding and unwinding the traction rope;

[0036] The telescopic device further comprises a synchronous assembly and an adjusting assembly which are matched with each other.

[0037] The synchronous assembly comprises a synchronous rope and a synchronous rope wheel; the fixed section and three adjacent telescopic sections of the plurality of telescopic sections are drivingly connected through the synchronous rope and the synchronous rope wheel, so that the plurality of telescopic sections can be synchronously telescopically moved relative to the fixed section.

[0038] The adjusting assembly comprises a fixing member and an adjusting member, the fixing member is fixed to the top end of the fixed section or the top end of the telescopic section, the adjusting member penetrates through the fixing member along the telescopic direction and is screwed to the fixing member, the adjusting member has a third connecting structure, and the synchronous rope has a fourth connecting structure; the third connecting structure and the fourth connecting structure are matched and connected, so as to limit the synchronous rotation of the synchronous rope and the adjusting member, and enable the adjusting member to drive the synchronous rope to move relative to the fixed section along the telescopic direction.

[0039] In an embodiment, the third connecting structure comprises a ball groove structure and a channel structure which are arranged through the adjusting member along the telescopic direction, and the fourth connecting structure comprises a ball head structure arranged at an end of the synchronous rope; the synchronous rope is arranged through the channel structure, so as to limit the ball head structure in the ball groove structure.

[0040] In an embodiment, the adjusting assembly further comprises a locking member, the locking member is located on a side of the fixing member away from the corresponding telescopic section or the fixed section along the telescopic direction; the locking member is threadedly sleeved to the adjusting member, so as to lock the position of the adjusting member relative to the fixing member.

[0041] In an embodiment, the telescopic device further comprises a hoisting assembly, the hoisting assembly comprises a hoisting shaft and a hoisting seat, the hoisting seat is connected to the inside of the central section, and the hoisting seat has a first connecting part and a second connecting part which are spaced apart from each other; the hoisting shaft is movably connected to the first connecting part and the second connecting part, so as to provide a sleeve structure for the traction rope.

[0042] When the hoisting shaft is connected with the first connecting part and the second connecting part at the same time, the sleeve ring structure can be limited between the first connecting part and the second connecting part; when at least one of the first connecting part and the second connecting part is separated from the hoisting shaft, the sleeve ring structure can be sleeved on the hoisting shaft or removed from the hoisting shaft.

[0043] In one embodiment, the first connecting part and the second connecting part are each provided with a first plug-in hole for inserting two ends of the hoisting shaft;

[0044] The hoisting assembly further comprises a locking piece, and the first connecting part and / or the second connecting part is / are threadedly connected with the locking piece; the locking piece is used for abutting against a peripheral surface of the hoisting shaft to lock and fix the hoisting shaft with the first connecting part or lock and fix the hoisting shaft with the second connecting part.

[0045] In one embodiment, the hoisting seat further has a third connecting part, and the first connecting part and the second connecting part are protruded on the same side of the third connecting part;

[0046] The hoisting assembly further comprises a fixing shaft, and the center section is provided with a second plug-in hole and a third plug-in hole; the fixing shaft penetrates through the second connecting part, and two ends of the fixing shaft are respectively plugged into the second plug-in hole and the third plug-in hole to limit and fix the hoisting seat inside the center section.

[0047] In one embodiment, the fixing shaft has an end head part and a shaft rod part, a radial dimension of the end head part is greater than a radial dimension of the shaft rod part; the shaft rod part penetrates through the third connecting part, and one end of the shaft rod part away from the end head part is plugged into the second plug-in hole; the third plug-in hole is a counterbore hole, and the end head part is accommodated in the third plug-in hole;

[0048] The hoisting assembly further comprises an anti-disengagement piece; the anti-disengagement piece is connected to the center section and is used for blocking the end head part from the side away from the shaft rod part to limit the end head part from disengaging from the third plug-in hole.

[0049] According to a third aspect, one embodiment provides an X-ray photography system, comprising an X-ray detector, a processor, a suspension device, a machine head device, and the telescopic device of the first aspect or the second aspect; wherein:

[0050] The machine head device is connected to the center section and is used for emitting X-rays to a shooting object;

[0051] The suspension device comprises a hanger and a traction mechanism, the fixed node is fixedly connected with the hanger; the traction mechanism connects the center node through a traction rope to drive the plurality of telescopic nodes to move relative to the fixed node by winding and unwinding the traction rope, so as to adjust the position of the head device in the telescopic direction.

[0052] The X-ray detector is used for receiving X-rays passing through the photographic object; the processor is signal-connected with the X-ray detector, and is used for processing the X-ray signal output by the X-ray detector and imaging.

[0053] The telescopic device of the X-ray photography system according to the above embodiment comprises a limiting piece and a plurality of telescopic nodes which are sequentially sleeved from outside to inside, the fixed node is used for being fixedly connected with the hanger of the suspension device, the innermost telescopic node is used for connecting the head device, and the innermost telescopic node is also used for being connected with the traction mechanism of the suspension device through a traction rope; the limiting piece is located at the top end side of the telescopic node; the limiting piece is used for abutting against the telescopic node, so that when the plurality of telescopic nodes are retracted to a preset position, the top end faces of the plurality of telescopic nodes and the top end face of the fixed node are in the same height in the telescopic direction. When the telescopic nodes are retracted to the preset position (for example, the telescopic nodes are completely retracted) relative to the fixed node, the telescopic nodes can be mechanically limited by the limiting piece, so as to reduce or eliminate the height step difference between the telescopic nodes and between the telescopic nodes and the fixed node, thereby the head device can be given a larger lifting range without increasing the number of telescopic nodes. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 The application principle schematic diagram (one) of the X-ray photography system of an embodiment.

[0055] Figure 2 The application principle schematic diagram (two) of the X-ray photography system of an embodiment.

[0056] Figure 3 The structural schematic diagram of the telescopic device in a retracted state of an embodiment.

[0057] Figure 4 The structural schematic diagram of the telescopic device in an extended state of an embodiment.

[0058] Figure 5 The structural schematic diagram of the top end part of the telescopic device of an embodiment.

[0059] Figure 6 The structural schematic diagram of the A area of the telescopic device. Figure 5 The structural schematic diagram of the A area of the telescopic device.

[0060] Figure 7 The schematic diagram of the hoisting assembly and the rope connection structure of the telescopic device of an embodiment.

[0061] Figure 8 Structure exploded view of the hoisting assembly in the telescopic device of an embodiment.

[0062] Figure 9 Simplified diagram of the synchronous telescoping principle of the telescopic device of an embodiment.

[0063] Figure 10 Cross-sectional structure diagram of the adjusting assembly in the telescopic device of an embodiment.

[0064] Figure 11 Setting form diagram of the limiting member in the telescopic device of an embodiment (I).

[0065] Figure 12 Setting form diagram of the limiting member in the telescopic device of an embodiment (II).

[0066] Figure 13 Setting form diagram of the limiting member in the telescopic device of an embodiment (II).

[0067] In the figure:

[0068] 100, telescopic device; 100a, first section; 100b, second section; 100c, third section; 110, fixed section; 120, telescopic section; 120a, center section; 120b, second insertion hole; 120c, third insertion hole; 131, hoisting shaft; 132, hoisting seat; 132a, first connecting part; 132b, second connecting part; 132c, third connecting part; 132d, first insertion hole; 133, locking member; 134, fixed shaft; 134a, end part; 134b, shaft part; 135, anti-dropping member; 140, synchronous rope; 140a, ball head structure; 150, synchronous rope wheel; 160, fixing member; 170, adjusting member; 170a, ball groove structure; 180, locking member;

[0069] 200, head device; 300, suspension device; 310, hanger; 320, traction mechanism; 400, traction rope; 400a, bending section; 400b, main body section; 410, pressing joint; 500, limiting member; 500a, limiting surface; 500b, fixing plate; 500c, limiting block; 510, first limiting member; 520, second limiting member; 600, safety rope; 700, X-ray detector; 800, photographic bed; 900, stand. DETAILED DESCRIPTION

[0070] The application will be described in further detail below with specific reference being made to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that the application can be practiced without some or all of these details. In other instances, well known process steps have not been described in detail in order not to unnecessarily obscure the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description is for describing particular embodiments only and is not intended to be limiting of the application. As used in the description, the articles "a", "an", and "the" are intended to mean one or more unless otherwise indicated.

[0071] In addition, features, operations, or steps described in the specification can be combined in any suitable manner without departing from the scope of the application. Similarly, the various steps or acts in a method described in the specification can be combined or omitted without departing from the scope of the application. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.

[0072] The serial numbers of components in this specification, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. The application refers to "connection" and "coupling", unless otherwise specified, which includes direct and indirect connection (coupling).

[0073] Please refer to Figure 1 and Figure 2 The embodiment of the application provides an X-ray photography system, which comprises a telescopic device 100, a head device 200, a suspension device 300, an X-ray detector 700, a processor (not shown in the figure) and other functional components as needed.

[0074] The head device 200 is arranged at one end (for example, the bottom end) of the telescopic device 100 along the telescopic direction of the telescopic device 100, and is mainly used for emitting X-rays and irradiating a shooting object (for example, a human body or other animal body); the suspension device 300 is arranged at the other end (for example, the top end) of the telescopic device 100 along the telescopic direction of the telescopic device 100, and is mainly used for positioning and fixing the telescopic device 100 at a preset position in the environmental space, and driving the telescopic device 100 to perform telescopic movement, so as to adjust the height position of the head device 200 in the telescopic direction.

[0075] The X-ray detector 700 (for example, a flat panel detector) is connected to the processor in signal, for example, through a wireless network or a cable line or other connection mode capable of transmitting signals; the X-ray detector 700 is mainly used for receiving X-rays passing through the photographed object and converting the X-rays into X-ray signals transmitted to the processor; the processor processes the received X-ray signals and performs imaging according to the X-ray signals, thereby achieving the function of X-ray imaging of a specific part of the photographed object to assist doctors in medical diagnosis and treatment.

[0076] In some embodiments, as shown in Figure 1 , the telescopic device 100 and the head device 200 are suspended above the photographic bed 800 (for example, the telescopic device 100 is located below the ceiling) by the suspension device 300, the X-ray detector 700 is arranged on the photographic bed 800, and the photographed object can lie on the photographic bed 800; in this way, the height position of the head device 200 can be adjusted by the telescopic device 100, so that the head device 200 can irradiate the photographed object from above the photographed object, and the X-rays passing through the photographed object can be received by the X-ray detector 700, thereby finally realizing X-ray imaging and imaging.

[0077] In some embodiments, as shown in Figure 2 , the telescopic device 100 and the head device 200 are suspended laterally to the column 900 by the suspension device 300, the X-ray detector 700 is arranged on the column 900, and the photographed object can stand between the column 900 and the head device 200; the height position of the head device 200 can be adjusted by the telescopic device 100, so that the head device 200 can irradiate the photographed object from the side of the column 900 or the photographed object, and the X-rays passing through the photographed object can be received by the X-ray detector 700, thereby finally realizing X-ray imaging and imaging.

[0078] Hereinafter, the telescopic device 100 and related structures will be mainly introduced, and the structures, working principles and the like of other components (for example, the head device 200, the X-ray detector 700, etc.) of the X-ray imaging system can refer to the prior art, which will not be described here.

[0079] As shown in Figures 3 to 13, the telescopic device 100 comprises a fixed section 110 and a plurality of telescopic sections 120 which are sequentially sleeved from outside to inside; for example, the inside of the fixed section 110 is sequentially sleeved with three telescopic sections 120 to form a four-section telescopic device 100; for the convenience of distinguishing and describing, one of the plurality of telescopic sections 120 located at the innermost side is defined as a center section 120a; the suspension device 300 comprises a hanger 310 and a traction mechanism 320; wherein the hanger 310 can be installed on the ceiling of a room or installed on a ceiling track (commonly known as a ceiling rail), the top end of the fixed section 110 in the telescopic direction of the telescopic device 100 is fixed to the hanger 310, and the bottom end of the head device 200 and the center section 120a in the telescopic direction is connected, so as to suspend the head device 200 below the hanger 310 by the telescopic device 100; and the traction mechanism 320 is arranged above the hanger 310, and the traction mechanism 320 is connected to the center section 120a through a traction rope 400 (such as a steel wire rope); for example, the traction rope 400 is wound on the traction mechanism 320, and one end of the traction rope 400 passes through the hanger 310 and is connected to the center section 120a.

[0080] During the process of winding the traction rope 400, the traction mechanism 320 can gradually retract the plurality of telescopic sections 120 including the center section 120a into the fixed section 110 to lift the height position of the head device 200 by relying on the traction rope 400; on the contrary, during the process of releasing the traction rope 400, the plurality of telescopic sections 120 including the center section 120a can gradually extend out of the fixed section 110 under the action of gravity of the head device 200 to lower the height position of the head device 200.

[0081] In some embodiments, the telescopic device 100, the head device 200 and the suspension device 300 (together with the traction rope 400) can be pre-assembled together and then installed in an application scenario.

[0082] In some embodiments, the hanger 310 and the traction mechanism 320 can be two relatively independent functional components, which are structurally combined by the hanger 310 when the telescopic device 100 or the X-ray photography system is applied; it can be understood that in other embodiments, the hanger 310 can be omitted, and the ceiling or the ceiling track is used as a mounting carrier of the traction mechanism 320 and the fixed section 110; all of these will not be repeated here.

[0083] In one embodiment, please refer to Figure 4 , Figures 11 to 13The telescopic device 100 further comprises one or more limiters 500, which are mainly used to mechanically limit the plurality of telescopic sections 120, so as to reduce or eliminate the height difference between the top ends of the telescopic sections 120 and between the top end of the telescopic section 120 and the top end of the fixed section 110, thereby lifting the head device 200 to the highest height position when the telescopic section 120 is retracted to the preset position (e.g. the telescopic device 100 is fully retracted) relative to the fixed section 110, and giving the head device 200 a greater lifting stroke range.

[0084] Specifically, the limiters 500 are located at the top end side of the telescopic device 100, for example, the limiters 500 can be fixed to the top end of the fixed section 110 or the top end of the telescopic section 120, so that the limiters 500 can face the top end faces of the telescopic sections 120 in the telescopic direction; when the telescopic section 120 is retracted to the height position abutting against the limiters 500 relative to the fixed section 110, the top end faces of the plurality of telescopic sections 120 and the top end face of the fixed section 110 are leveled or coplanar in the telescopic direction by the limiters 500, thereby solving the problem that the lifting stroke of the head device 200 is limited due to the height difference between the top end of the telescopic section 120 and the top end of the fixed section 110.

[0085] It should be understood that leveled or coplanar means approximately leveled or coplanar, and in an ideal state, it is absolutely leveled or coplanar; in fact, due to factors such as machining tolerance of components and installation tolerance between components, there may be some deviations in leveled or coplanar, but it will not affect the reduction of the height difference between the top ends of the telescopic sections.

[0086] For example, please refer to Figure 5 , Figure 11 and Figure 12 The number of limiters 500 is one; the limiters 500 are arranged in the form of spanning the plurality of telescopic sections 120 in the inward and outward directions perpendicular to the telescopic direction, and are fixed to the top end of the fixed section 110 or to the suspension device 300 (e.g. the hanger 310).

[0087] Please refer to Figure 11 The limiter 500 can have a limiting surface 500a, and the limiting surface 500a has a preset length in the inward and outward directions, so that the limiting surface 500a can be opposite to the top end faces of the plurality of telescopic sections 120 in the telescopic direction. For example, the limiter 500 is generally a flat plate structure with a preset length in the inward and outward directions, the outer end of the limiter 500 is stacked and fixed to the top end of the fixed section 110, and the limiting surface 500a is arranged in leveled or coplanar with the top end face of the fixed section 110.

[0088] Please refer toFigure 5 and Figure 12 The limiting member 500 can also have a plurality of limiting surfaces 500a corresponding to the plurality of telescopic sections 120; it can be understood that the limiting surfaces 500a are located on the limiting member 500 in a position where they can face each other in the telescopic direction with the top end surfaces of the corresponding telescopic sections 120.

[0089] For example, referring to Figure 5 The limiting member 500 can include a fixed plate 500b and a plurality of limiting blocks 500c, each of which has a limiting surface 500a arranged in the same height as the top end surface of the fixed section 110; the fixed plate 500b is generally a plate-shaped structure with a predetermined length in the inner-outer direction, the outer end of the fixed plate 500b is stacked and fixed to the top end surface of the fixed section 110 or the fixed plate 500b is fixed to the suspension device 300, and the plurality of limiting blocks 500c are arranged on the fixed plate 500b along the length direction of the fixed plate 500b, thereby forming a plurality of limiting surfaces 500a corresponding to the plurality of telescopic sections 120 in the limiting member 500.

[0090] Therefore, when the telescopic section 120 is retracted relative to the fixed section 110 and moves to a position where the limiting surface 500a of the limiting member 500 abuts against the top end surface of the telescopic section 120, the top end surface of the telescopic section 120 will be kept in the same height as the top end surface of the fixed section 110; when the top end surfaces of the plurality of telescopic sections 120 are kept in the same height as the top end surface of the fixed section 110, the telescopic device 100 is in a fully retracted state, at this time, there is basically no step difference between the top ends of the telescopic sections 120 and between the top end of the telescopic section 120 and the fixed section 110, which also makes the head device 200 be lifted to the highest height position, giving the head device 200 a greater lifting stroke range.

[0091] In some embodiments, referring to Figure 13 The number of limiting members 500 is set to be multiple, and the plurality of limiting members 500 are arranged staggered in the circumferential direction around the telescopic direction, for example, a part of the plurality of limiting members 500 can be fixed to the suspension device 300 (specifically, the hanger 310), and another part of the plurality of limiting members 500 can be fixed to the top end of the fixed section 110 or the top end of the telescopic section 120; each limiting member 500 has a limiting surface 500a that can abut against the top end surface of at least one telescopic section 120; when the limiting surface 500a abuts against the top end surface of the corresponding telescopic section 120, the top end surface of the telescopic section 120 and the top end surface of the fixed section 110 are kept in the same height or coplanar.

[0092] For example, referring to Figure 13The plurality of limiting members 500 includes one or more first limiting members 510. For ease of distinction and description, the one located on the outer side of two adjacent expansion joints 120 is defined as the outer expansion joint and the one located on the inner side is defined as the inner expansion joint. The first limiting member 510 is fixed to the top of the outer expansion joint (for example, the outer end of the fixing plate 500b of the first limiting member 510 is stacked and fixed to the top end face of the outer expansion joint), and the limiting surface 500a of the first limiting member 510 is arranged at the same height and in the same plane as the top end face of the outer expansion joint.

[0093] For example, the telescopic device 100 has three telescopic joints 120 and one first limiting member 500; wherein, the central joint 120a is the inner telescopic joint, the telescopic joint 120 adjacent to the central joint 120a is the outer telescopic joint, the outer end of the first limiting member 510 is fixed to the top end face of the outer telescopic joint, and the limiting surface 500a of the first limiting member 510 faces the top end face of the central joint 120a in the telescopic direction.

[0094] In this way, by having the limiting surface 500a of the first limiting member 510 abut against the top end face of the inner telescopic joint, a mechanical limiting relationship can be established between two adjacent telescopic joints 120. When the inner telescopic joint retracts relative to the outer telescopic joint or the fixed joint 110 to the position where its top end face abuts against the limiting surface 500a of the first limiting member 510, the top end face of the inner telescopic joint and the top end face of the outer telescopic joint can be kept at the same height and flush, thereby reducing or eliminating the height difference between the top ends of two adjacent telescopic joints 120.

[0095] For example, please refer to Figure 13 The plurality of limiting members 500 includes one or more second limiting members 520, which can be fixed to the top end of the fixed section 110 or the suspension device 300 (e.g., hanger 310), and the limiting surface 500a of the second limiting member 520 can be opposite to the top end face of one or more telescopic sections 120 in the telescopic direction.

[0096] For example, the telescopic device 100 has three telescopic joints 120 and two second limiting members 520. The telescopic joint 120 adjacent to the fixed joint 110 can be regarded as the outer telescopic joint, and the telescopic joint 120 adjacent to the center joint 120a can be regarded as the inner telescopic joint. The two second limiting members 520 are fixed at intervals to the suspension device 300 (e.g., the hanger 310). The limiting surface 500a of one of the second limiting members 520 faces each other in the telescopic direction with the top end face of the outer telescopic joint, and the limiting surface 500a of the other second limiting member 520 faces each other in the telescopic direction with the top end face of the inner telescopic joint.

[0097] In this way, when the telescopic device 500 is fully retracted, the top end face of each telescopic section 120 is limited to be flush with or coplanar with the top end face of the fixed section 110 by the abutting of the limiting face 500a of one of the second limiting members 520 against the top end face of the outer telescopic section, the abutting of the limiting face 500a of another of the second limiting members 520 against the top end face of the inner telescopic section, and the abutting of the first limiting member 510 against the top end face of the central section 120a, so as to reduce or eliminate the height difference between the top ends of the telescopic sections 120 and the top end of the fixed section 110, and to enable the head device 200 to be lifted to a higher position, and to provide the head device 200 with a larger lifting stroke range.

[0098] In practice, the specific positions, numbers, and structural forms of the first limiting members 510 and the second limiting members 520 can be adjusted according to actual needs, for example, the limiting face 500a of the second limiting member 520 can be extended in the inner-outer direction so as to abut against the top end face of one or more telescopic sections 120. Details are not described herein.

[0099] Therefore, the mechanical limiting of the plurality of telescopic sections 120 from the top end side by the limiting members 520 can make the top end face of each telescopic section 120 coplanar with or flush with the top end face of the fixed section 110 (see Figure 3 and Figure 5 ), so as to effectively reduce or eliminate the height difference between the top ends of the telescopic sections 120 and the top end of the fixed section 110. In this way, the head device 200 can be lifted to a higher position without increasing the number of telescopic sections 120, and the head device 200 is provided with a larger lifting stroke range, and the requirements of the X-ray photography system on the application environment are reduced.

[0100] In one embodiment, please refer to Figure 4 , Figure 5 and Figure 9, the telescopic device 100 has three telescopic sections 120, and the number of the limiters 500 is set to three; for the convenience of distinguishing and describing, the three telescopic sections 120 are defined as a first telescopic section, a second telescopic section and a third telescopic section (it can be understood that the third telescopic section is equivalent to the center section 120a) from outside to inside in sequence; wherein, the first one (for example, the first limiter 510) of the three limiters 500 is fixed to the top end of the telescopic section 120 adjacent to the center section 120a, and the limiting surface 500a of the limiter 500 is used to abut against the top end surface of the center section 120a; the second one (for example, one of the second limiters 520) of the three limiters 500 is fixed to the hanger 310, and the limiting surface 500a of the limiter 500 is used to abut against the top end surface of the second telescopic section; the third one (for example, the other second limiter 520) of the three limiters 500 is fixed to the hanger 310, and the limiting surface 500a of the limiter 500 is used to abut against the top end surface of the first telescopic section.

[0101] Therefore, on the premise that the telescopic device 100 is configured as a four-section telescopic structure, the step difference between the top ends of the telescopic sections 120 and the fixed section 110 can be reduced by the one-to-one correspondence between the limiters 500 and the telescopic sections 120, which not only helps to increase the telescopic stroke of the telescopic device 100 and give the head device 200 a larger lifting range, but also helps to reduce the weight and cost of the telescopic device 100.

[0102] In one embodiment, referring to Figure 4 The fixed section 110 and the telescopic section 120 have the same size in the telescopic direction, for example, the fixed section 110 and the telescopic section 120 adopt a six-prism hollow profile structure with the same length; in this way, when the limiter 500 abuts against the top end surface of the telescopic section 120, the bottom end surface of each telescopic section 120 and the bottom end surface of the fixed section 110 can also be level or coplanar, achieving the effect of reducing or eliminating the height step difference between the bottom ends of the telescopic sections 120 and the fixed section 110, so that the height of the head device 200 is further increased, that is, the lifting range of the head device 200 is further increased.

[0103] In one embodiment, referring to Figures 6 to 8, the telescopic device 100 further comprises a hoisting assembly, the hoisting assembly comprises a hoisting shaft 131 and a hoisting seat 132, the hoisting seat 132 is connected to the inside of the center section 120a (for example, the hoisting seat 132 is locked inside the center section 120a close to the top end position by a screw or the like fastener, and the hoisting seat 132 is an integral structure with the center section 120a), the hoisting seat 132 has a first connecting part 132a and a second connecting part 132b which are opposite in the inside-outside direction; the hoisting shaft 131 is movably connected to the first connecting part 132a and the second connecting part 132b, mainly used for the loop structure of the traction rope 400 to be sleeved, so as to establish a connection relationship between the traction rope 400 and the center section 120a inside the center section 120a.

[0104] Specifically, the hoisting shaft 131 is arranged in the center section 120a along the inside-outside direction, when the hoisting shaft 131 is connected to the first connecting part 132a and the second connecting part 132b at the same time (for example, the hoisting shaft 131 is simultaneously sleeved or inserted into the first connecting part 132a and the second connecting part 132b along the inside-outside direction), the loop structure sleeved on the hoisting shaft 131 can be limited between the first connecting part 132a and the second connecting part 132b, and the locking connection between the traction rope 400 and the center section 120a is realized; on the contrary, at least one of the first connecting part 132a and the second connecting part 132b is separated from the hoisting shaft 131 (for example, one end of the hoisting shaft 131 is separated from the second connecting part 132a), the loop structure can be sleeved on the hoisting shaft 131 or taken off from the hoisting shaft 131, so as to release the connection relationship between the center section 120a and the traction rope 400.

[0105] In the existing X-ray photography system, the common connection mode between the telescopic cylinder assembly and the traction steel wire rope is to use the rope clamp structure protruding from the top of the telescopic cylinder assembly to lock and fix the end of the traction steel wire rope passing out of the telescopic cylinder assembly and the body of the traction steel wire rope; but this connection mode needs to reserve space for operating the rope clamp structure in the top space of the telescopic cylinder assembly (for example, between the center section 120a and the hanger 310), which is one of the factors that limits the lifting height or lifting range of the X-ray head.

[0106] Compared with the prior art, the telescopic device 100 provided by the embodiment of the present application can establish the connection relationship between the traction rope 400 and the center section 120a inside the center section 120a from the side of the center section 120a in a nearly sinking manner by cooperation of the hoisting shaft 131 and the hoisting seat 132, without reserving operation space for the connection between the traction rope 400 and the center section 120a at the top end side of the telescopic device 100, thereby creating conditions for further improving the height position of the head device 200 or making the head device 200 obtain a larger lifting range.

[0107] It should be noted that the forming method and specific structure of the loop structure can be selected and set as needed, as long as it can extend into the inside of the center hub 120a and has a space for the hoisting shaft 131 to pass through. Exemplarily, please refer to Figure 8 The traction rope 400 can be used to connect the end of the hoisting shaft 131 to form a bent section 400a, and the bent section 400a and the main section 400b of the traction rope 400 are press-fitted by the press joint 410, that is, a loop structure can be formed; Exemplarily, one end of the traction rope 400 can be fixedly connected to a component such as a carabiner, and the carabiner is used as the loop structure of the traction rope 400; All of the above will not be repeated here.

[0108] In one embodiment, please refer to Figure 7 and Figure 8 The hoisting assembly further comprises a locking member 133; wherein the first connecting portion 132a and the second connecting portion 132b are each provided with a first plug-in hole 132d, and the peripheral wall of the center hub 120a is provided with a through hole corresponding to the first plug-in hole 132d of the first connecting portion 132a or the first plug-in hole 132d of the second connecting portion 132b; in this way, the hoisting shaft 131 can be connected to the hoisting seat 132 in a plug-in form to achieve locking connection or unlocking of the traction rope 400; for example, the hoisting shaft 131 can be inserted into the first plug-in hole 132d from the outside of the peripheral side of the center hub 120a, thereby connecting the first connecting portion 132a and the second connecting portion 132b.

[0109] Meanwhile, the first connecting portion 132a and the second connecting portion 132b are each correspondingly connected to a locking member 133, which can be a fastener such as a screw arranged through the hole wall of the first plug-in hole 132d; after the loop structure of the traction rope 400 is sleeved on the hoisting shaft 131 and the hoisting shaft 131 is inserted into the corresponding first plug-in hole 132d, the locking member 133 can be made to abut against the peripheral surface of the hoisting shaft 131 inside the first plug-in hole 132d by screwing the locking member 133, thereby locking and fixing the hoisting shaft 131 with the first connecting portion 132a and the hoisting shaft 131 with the second connecting portion 132b, achieving the effect of limiting the loop structure between the first connecting portion 132a and the second connecting portion 132b; and the hoisting shaft 131 can be prevented from moving axially or rotating circumferentially, so as to ensure the stability of the connection between the traction rope 400 and the center hub 120a.

[0110] In one embodiment, please refer to Figure 7 and Figure 8The lifting seat 132 further has a third connecting portion 132c, and the first connecting portion 132a and the second connecting portion 132b are fixedly arranged on the same side of the third connecting portion 132c; the lifting seat 132 adopts an integrated structure, and the first connecting portion 132a and the second connecting portion 132b are protruded on the upper side of the third connecting portion 132c in the telescopic direction; correspondingly, the lifting assembly further comprises a fixing shaft 134, and the peripheral wall of the center joint 120a is provided with a second insertion hole 120b and a third insertion hole 120b which are opposite in the inner-outer direction; wherein the fixing shaft 134 can be arranged through the third connecting portion 132c in a direction intersecting the axial direction of the lifting shaft 131, and the two ends of the fixing shaft 134 are respectively inserted into the second insertion hole 120b and the third insertion hole 120c.

[0111] Therefore, by the cooperation of the fixing shaft 134 and the third connecting portion 132c, the lifting seat 132 is detachably fixed inside the center joint 120a; at the same time, by the second insertion hole 120b and the third insertion hole 120c, it is convenient to pull out and insert the fixing shaft 134 outside the peripheral side of the center joint 120a, and the force borne by the lifting seat 132 can be dispersed to different positions of the center joint 120a, which is beneficial to improve the stability of the overall structure and work of the lifting assembly.

[0112] In some embodiments, referring to Figure 7 and Figure 8 , the lifting assembly further comprises an anti-disengagement piece 135, and the fixing shaft 134 has an end head portion 134a and a shaft rod portion 134b; wherein the shaft rod portion 134b is arranged through the third connecting portion 132c, and the end of the shaft rod portion 134b away from the end head portion 134a can be inserted into the second insertion hole 120b; the radial dimension of the end head portion 134a is greater than the radial dimension of the shaft rod portion 134b, and the third insertion hole 120c adopts a countersunk hole, and the end head portion 134a can be accommodated in the third insertion hole 120c.

[0113] As to the anti-disengagement piece 135, the anti-disengagement piece 135 is connected to the center joint 120a, and is mainly used for blocking the end head portion 134a from the side away from the shaft rod portion 134b to limit the end head portion 134a from disengaging from the third insertion hole 120c, so that the fixing shaft 134 can stably fix the lifting seat 132 inside the center joint 120a.

[0114] In specific implementation, the anti-disengagement piece 135 can be a baffle structure locked on the outer side surface of the center joint 120a by screws or the like, so that the end head portion 134a can be enclosed in the third insertion hole 120c to avoid the end head portion 134a forming a protrusion on the outer surface of the center joint 120a, and the end head portion 134a can also form axial limiting for the fixing shaft 134.

[0115] In some embodiments, referring to Figures 3 to 8 , the X-ray photography system further comprises a balancer (not labeled in the figure) arranged at the top end side of the telescopic device 100, for example, the balancer is arranged above the hanger 310; the balancer is connected with the center joint 120a through a safety rope 600, and the end of the safety rope 600 away from the balancer can be provided with a thimble structure in reference to the traction rope 400, so as to be connected with the center joint 120a by means of the hoisting assembly.

[0116] Thus, in the process of the traction mechanism 320 driving the telescopic joint 120 to telescope relative to the fixed joint 110 through the traction rope 400, the safety rope 600 can be reeled in and out synchronously by means of the balancer; once the traction rope 400 is broken accidentally, the center joint 120a can be pulled by the safety rope 600 to prevent safety accidents such as the falling of the nose device 200; and based on the connection relationship established between the hoisting assembly and the center joint 120a by the safety rope 600, the occupation of the space at the top of the telescopic device 100 can also be avoided.

[0117] In one embodiment, referring to Figure 5 , Figure 9 and Figure 10 , the telescopic device 100 adopts a synchronous telescoping structure, that is, a plurality of telescopic joints 120 can move synchronously relative to the fixed joint 110 under the driving of the traction rope 400; specifically, the telescopic device 100 further comprises a synchronous assembly and an adjusting assembly matched with each other, and at least one synchronous assembly and at least one adjusting assembly are arranged in the three adjacent ones of the fixed joint 110 and the plurality of telescopic joints 120; for the convenience of distinguishing and describing, the one located at the outermost side among the three adjacent ones of the fixed joint 110 and the plurality of telescopic joints 120 is defined as the first joint 100a, the one located in the middle is defined as the second joint 100b, and the one located at the innermost side is defined as the third joint 100c.

[0118] Referring to Figure 9 , the synchronous assembly comprises a synchronous rope 140 and a synchronous rope wheel 150; wherein one end of the synchronous rope 140 is fixed to the top end of the first joint 100a through the adjusting assembly, the synchronous rope wheel 150 is rotatably arranged at the bottom end of the second joint 100b (for example, the direction of the rotation axis of the synchronous rope wheel 150 is the inside-outside direction), and the other end of the synchronous rope 140 is fixed to the top end of the third joint 100c by passing through the synchronous rope wheel 150 (for example, fixedly connected with the top end of the third joint 100c by means of a fixed plate or the like).

[0119] Referring to Figure 10The adjusting assembly comprises a fixing member 160 and an adjusting member 170; the fixing member 160 is fixed to the top end of the first section 100a (for example, fixed to the top end face of the first section 100a in a stacking manner), and the adjusting member 170 is arranged through the fixing member 160 in the telescopic direction and screwed to the fixing member 160; the adjusting member 170 has a third connecting structure, and the synchronous rope 140 has a fourth connecting structure at one end connected to the adjusting assembly; the third connecting structure and the fourth connecting structure are connected in cooperation, on the one hand, to establish a connection relationship between the synchronous rope 140 and the adjusting member 170, and on the other hand, to limit the synchronous rotation of the synchronous rope 140 and the adjusting member 170. It can be understood that the fixing member 160 is fixedly connected to the top end of the corresponding telescopic section 120 or fixed section 110.

[0120] Exemplarily, please refer to Figure 9 The telescopic device 100 has three telescopic sections 120, two synchronous assemblies and two adjusting assemblies; the three telescopic sections 120 are sequentially the first telescopic section, the second telescopic section and the third telescopic section (i.e., the center section 120a) from outside to inside, the synchronous ropes 140 of the two synchronous assemblies are respectively the first rope (for example, the rope shown by the left thick solid line in Figure 9 ) and the second rope (for example, the rope shown by the right thick solid line in Figure 9 ), and the synchronous sheaves 150 of the two synchronous assemblies are respectively the first sheave and the second sheave.

[0121] The first sheave is arranged at the bottom end of the first telescopic section, one end of the first rope is fixed to the top end of the fixed section through a corresponding adjusting assembly, and the other end of the first rope is fixedly connected to the top end of the second telescopic section after passing around the first sheave; the second sheave is arranged at the bottom end of the second telescopic section, one end of the second rope is fixed to the top end of the first telescopic section through a corresponding adjusting assembly, and the other end of the second rope is fixedly connected to the top end of the third telescopic section after passing around the second sheave.

[0122] Therefore, based on the connection relationship established by the synchronous rope 140 and the synchronous sheave 150 in the linkage group, the plurality of telescopic sections 120 can have the condition of synchronous telescopic movement relative to the fixed section 110; by using the threaded connection relationship between the adjusting member 170 and the fixing member 160, the adjusting member 170 can be moved along the telescopic direction relative to the fixing member 160 by screwing the adjusting member 170, so as to realize the adjustment of the tightness of the synchronous rope 140.

[0123] Compared with the existing synchronous stretching structure, the nut is usually arranged on the upper and lower sides of the fixing member 160, and the tightness of the synchronous rope 140 is adjusted based on the nut, and the relative position of the synchronous rope 140 and the fixing member 160 is locked. In the embodiment, the threaded connection relationship between the adjusting member 170 and the fixing member 160 can directly adjust the tightness of the synchronous rope 140 and lock the relative position of the synchronous rope 140 and the fixing member 160 by rotating the adjusting member 170, which is not only convenient and fast to operate, but also saves the operation space of the adjusting member 170 (i.e. only a certain operation space is provided for the adjusting member 170 above the fixing member 160), which can support the height position of the head device 200 or give the head device 200 a larger lifting range.

[0124] In addition, in the case that the telescopic device 100 is provided with multiple synchronous assemblies, the tightness of the synchronous rope 140 is adjusted by the threaded connection relationship between the adjusting member 170 and the fixing member 160, which can also ensure the consistency of the tightness of the multiple synchronous ropes 140, which can not only ensure the synchronous stretching movement of the multiple telescopic sections 120 relative to the fixed section 110, but also improve the stability of the synchronous movement of the telescopic sections 120.

[0125] It should be noted that the synchronous stretching based on the synchronous assembly belongs to the prior art or can be selected and set according to the prior art, which is not described here.

[0126] In one embodiment, please refer to Figure 10 The third connecting structure includes a ball groove structure 170a and a channel structure (not labeled in the figure) arranged through the adjusting member 170 in the stretching direction, for example, the adjusting member 170 is approximately a bolt structure, the ball groove structure 170a is located in the nut part of the adjusting member 170, and the channel structure 170 is arranged through the screw part of the adjusting member 170 in the form of communicating with the ball groove structure 170a; correspondingly, the fourth connecting structure includes a ball head structure 140a formed at one end of the synchronous rope 140 corresponding to the adjusting assembly, for example, the ball head structure 140a can be formed at the end of the synchronous rope 140 by die casting; the synchronous rope 140 passes through the channel structure and is arranged to restrict the ball head structure 140a in the ball groove structure 170a, so as to realize the connection between the synchronous rope and the adjusting member 170.

[0127] Thus, by using the cooperation between the ball head structure 140a and the ball groove structure 170a, a relative rotation connection relationship can be formed between the synchronous rope 140 and the adjusting member 170, so as to limit the synchronous rotation between the synchronous rope 140 and the adjusting member 170; specifically, when the adjusting member 170 is screwed, the synchronous rope 140 can move linearly in the extension direction along with the adjusting member 170 relative to the fixed member 160, but will not or will not easily rotate along with the rotation of the adjusting member 170, so as to avoid interfering with the synchronous extension and contraction of the plurality of telescopic sections 120.

[0128] In other embodiments, the first connection structure and the second connection structure can also adopt other suitable cooperation forms, as long as they can limit the synchronous rotation between the synchronous rope 140 and the adjusting member 170; for example, a conical groove or a cylindrical groove is used instead of the ball groove structure 170, and the profile of the ball head structure 140a is adaptively adjusted.

[0129] In one embodiment, referring to Figure 5 and Figure 10 , the adjusting assembly further comprises a locking member 180, which is mainly used for locking the relative position between the adjusting member 170 and the fixed member 160, so as to avoid affecting the tightness of the synchronous rope 140 or affecting the consistency of the tension of the plurality of synchronous ropes 140 due to the accidental rotation of the adjusting member 170 relative to the fixed member 160; specifically, the locking member 180 is located on the side of the fixed member 160 away from the corresponding telescopic section 120 or fixed section 110 in the extension direction, and the locking member 180 is threadedly sleeved on the adjusting member 170, so that after the tightness of the synchronous rope 140 is adjusted, the locking member 180 can be rotated to abut against the fixed member 160, so as to lock the adjusting member 170 on the fixed member 160.

[0130] Since the space for operating the locking member 180 and the space for operating the adjusting member 170 are located on the same side of the fixed member 160, the lifting range of the head device 200 or the extension stroke of the telescopic device 100 can be avoided. In specific implementation, the locking member 180 can adopt a jam nut, so as to fully utilize the anti-loosening property of the jam nut to lock the adjusting member 170.

[0131] It should be noted that in some embodiments of the present application, the description of the "traction rope 400" and the "safety rope 600" is introduced only for the purpose of understanding the structural configuration, implementation principle, beneficial effects, etc. of the telescopic device 100, and does not mean that the traction rope 400 and the safety rope 600 are necessarily a component of the telescopic device 100. That is, taking the traction rope 400 as an example, in some embodiments, the traction rope 400 can be a component of the telescopic device 100, used to establish a connection relationship between the telescopic device 100 and the suspension device 300 when the telescopic device 100 is installed and applied; in other embodiments, the traction rope 400 can also be a component of the suspension device 300, used to establish a connection relationship between the suspension device 300 and the telescopic device 100 when the telescopic device 100 is installed and applied.

[0132] The above application of specific examples is used to illustrate the present application, which is only used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A telescoping device for an X-ray imaging system, characterized in that, The telescopic device comprises a fixed section and a plurality of telescopic sections, the fixed section is sequentially sleeved with the plurality of telescopic sections from outside to inside, and one of the plurality of telescopic sections located at the innermost side is a central section; in the telescopic direction of the telescopic device, the fixed section is used for fixed connection with a hanger of a suspension device, and the central section is used for connection with a machine head device capable of emitting X-rays; the central section is further used for connection of a traction mechanism of the suspension device through a traction rope, so that the plurality of telescopic sections can be telescopically moved relative to the fixed section along the telescopic direction by winding and unwinding the traction rope; Wherein, the telescopic device further comprises a limiting piece, and the limiting piece is located at the top end side of the telescopic section; the limiting piece is used for abutting against the telescopic section, so that when the plurality of telescopic sections are retracted to a preset position, the top end faces of the plurality of telescopic sections and the top end face of the fixed section are in the same height in the telescopic direction.

2. The retraction device of claim 1, wherein, The number of the limiting piece is one, and the limiting piece is fixed to the top end of the fixed section or the hanger; wherein: The limiting piece has one limiting surface, and the limiting surface has a preset length in the inside-outside direction perpendicular to the telescopic direction, so that the limiting surface can abut against the top end face of the plurality of telescopic sections; Or the limiting piece has a plurality of limiting surfaces, and the plurality of limiting surfaces correspond to the plurality of telescopic sections one by one, and the plurality of limiting surfaces can abut against the top end faces of the corresponding telescopic sections respectively.

3. The retraction apparatus of claim 1, wherein, The number of the limiting piece is a plurality, and the plurality of limiting pieces are arranged staggered in the circumferential direction around the telescopic direction, and each limiting piece has a limiting surface capable of abutting against the top end face of at least one telescopic section.

4. The retraction device of claim 3, wherein, One of the two adjacent telescopic sections located at the outside is an outer telescopic section, and one located at the inside is an inner telescopic section; wherein: At least one of the plurality of limiting pieces is fixed to the top end of the outer telescopic section, and is used for abutting against the inner telescopic section; And / or At least one of the plurality of limiting pieces is fixed to the top end of the fixed section or the hanger, and is used for abutting against the inner telescopic section and / or the outer telescopic section.

5. The retraction apparatus of claim 1, wherein, The fixed section and the telescopic section have the same size in the telescopic direction.

6. The retraction apparatus of claim 1, wherein, The telescopic device further comprises a hoisting assembly, the hoisting assembly comprises a hoisting shaft and a hoisting seat, the hoisting seat is connected to the inside of the central section, and the hoisting seat has a first connecting part and a second connecting part spaced apart from each other; the hoisting shaft movably connects the first connecting part and the second connecting part, and is used for sleeving a sleeve ring structure of the traction rope; Wherein, when the hoisting shaft is connected with the first connecting part and the second connecting part at the same time, the sleeve ring structure can be limited between the first connecting part and the second connecting part; when at least one of the first connecting part and the second connecting part is separated from the hoisting shaft, the sleeve ring structure can be sleeved on the hoisting shaft or removed from the hoisting shaft.

7. The telescoping device of claim 6, wherein, The first connecting part and the second connecting part are each provided with a first plug hole, and the first plug hole is used for inserting both ends of the hoisting shaft. The lifting assembly further comprises a locking member, the first connecting part and / or the second connecting part is screwed with the locking member; the locking member is used to abut the peripheral surface of the lifting shaft, so as to lock and fix the lifting shaft with the first connecting part or lock and fix the lifting shaft with the second connecting part.

8. The telescoping device of claim 6, wherein, The lifting seat further has a third connecting part, the first connecting part and the second connecting part are protruded on the same side of the third connecting part; The lifting assembly further comprises a fixing shaft, the center joint is provided with a second inserting hole and a third inserting hole; the fixing shaft penetrates the second connecting part, and the both ends of the fixing shaft are respectively inserted into the second inserting hole and the third inserting hole, so as to limit and fix the lifting seat inside the center joint.

9. The telescoping device of claim 8, wherein, The fixing shaft has an end head part and a shaft rod part, the radial dimension of the end head part is greater than the radial dimension of the shaft rod part; the shaft rod part penetrates the third connecting part, and one end of the shaft rod part away from the end head part is inserted into the second inserting hole; the third inserting hole is a counter-sunk hole, and the end head part is accommodated in the third inserting hole; The lifting assembly further comprises an anti-extraction member; the anti-extraction member is connected to the center joint, and is used to block the end head part from the side away from the shaft rod part, so as to limit the end head part from being separated from the third inserting hole.

10. The retraction apparatus of claim 6, wherein, The end of the traction rope used to be connected with the lifting shaft comprises a bending section; the bending section is fixedly connected with the main body section of the traction rope through a press joint, so as to form the loop structure.

11. A retraction device as claimed in any one of claims 1 to 10, wherein, The telescopic device further comprises a synchronous assembly and an adjusting assembly which are matched; wherein: The synchronous assembly comprises a synchronous rope and a synchronous rope wheel; the fixed joint and three adjacent telescopic joints in the plurality of telescopic joints are drivingly connected through the synchronous rope and the synchronous rope wheel, so that the plurality of telescopic joints can synchronously move relative to the fixed joint; The adjusting assembly comprises a fixing member and an adjusting member, the fixing member is fixed to the top end of the fixed joint or the top end of the telescopic joint, the adjusting member penetrates and is screwed to the fixing member along the telescopic direction, the adjusting member has a third connecting structure, and the synchronous rope has a fourth connecting structure; the third connecting structure and the fourth connecting structure are matched and connected, so as to limit the synchronous rope and the adjusting member from being synchronously rotated, and so that the adjusting member can drive the synchronous rope to move relative to the fixing member along the telescopic direction.

12. The telescoping device of claim 11, wherein, The third connecting structure comprises a ball groove structure and a channel structure which are arranged through the adjusting member along the telescopic direction, and the fourth connecting structure comprises a ball head structure arranged at the end of the synchronous rope; the synchronous rope penetrates the channel structure, so as to limit the ball head structure in the ball groove structure.

13. The retraction apparatus of claim 11, wherein, The adjusting assembly further comprises a locking member, the locking member is located on the side of the fixing member away from the corresponding telescopic joint or the fixed joint along the telescopic direction; the locking member is screwed to the adjusting member, so as to lock the position of the adjusting member relative to the fixing member.

14. The retraction apparatus of claim 11, wherein, The outermost one of the three adjacent ones among the fixed section and the plurality of telescopic sections is a first section, the middle one is a second section, and the innermost one is a third section. The synchronous rope wheel is arranged at the bottom end of the second section, one end of the synchronous rope is fixed to the top end of the first section through the adjusting assembly, and the other end of the synchronous rope is fixedly connected to the top end of the third section after passing through the synchronous rope wheel.

15. The retraction apparatus of claim 11, wherein, The number of the telescopic sections is three, and the three telescopic sections are sequentially a first telescopic section, a second telescopic section, and a third telescopic section from the outside to the inside; the number of the synchronous ropes is two, and one of the two synchronous ropes is a first rope and the other is a second rope; the number of the synchronous rope wheels is two, and one of the two synchronous rope wheels is a first rope wheel and the other is a second rope wheel; wherein: The first rope wheel is arranged at the bottom end of the first telescopic section, one end of the first rope is fixed to the top end of the fixed section through the adjusting assembly, and the other end of the first rope is fixedly connected to the top end of the second telescopic section after passing through the first rope wheel; The second rope wheel is arranged at the bottom end of the second telescopic section, one end of the second rope is fixed to the top end of the first telescopic section through the adjusting assembly, and the other end of the second rope is fixedly connected to the top end of the third telescopic section after passing through the second rope wheel.

16. A telescopic device of an X-ray imaging system, characterized in that The telescopic device comprises a fixed section and a plurality of telescopic sections, the fixed section and the plurality of telescopic sections are sequentially connected from the outside to the inside, and the innermost one of the plurality of telescopic sections is a central section; in the telescopic direction of the telescopic device, the top end of the fixed section is used for fixedly connecting with a hanger of a suspension device, and the central section is used for connecting with a head device capable of emitting X-rays; the central section is also used for connecting a traction mechanism of the suspension device through a traction rope, so that the plurality of telescopic sections can be telescopically moved relative to the fixed section along the telescopic direction by winding and unwinding the traction rope; The telescopic device further comprises a synchronous assembly and an adjusting assembly which cooperate with each other; The synchronous assembly comprises a synchronous rope and a synchronous rope wheel; the three adjacent ones among the fixed section and the plurality of telescopic sections are drivingly connected through the synchronous rope and the synchronous rope wheel, so that the plurality of telescopic sections can be synchronously telescopically moved relative to the fixed section; The adjusting assembly comprises a fixing member and an adjusting member, the fixing member is fixed to the top end of the fixed section or the top end of the telescopic section, the adjusting member penetrates through and is screwed to the fixing member along the telescopic direction, the adjusting member has a third connecting structure, and the synchronous rope has a fourth connecting structure; the third connecting structure and the fourth connecting structure are connected in cooperation, so as to limit the synchronous rotation of the synchronous rope and the adjusting member, and enable the adjusting member to drive the synchronous rope to move relative to the fixed section along the telescopic direction.

17. The telescoping device of claim 16, wherein, The third connecting structure comprises a ball groove structure and a channel structure penetrating through the adjusting member along the telescopic direction, and the fourth connecting structure comprises a ball head structure arranged at the end of the synchronous rope; the synchronous rope penetrates through the channel structure to limit the ball head structure in the ball groove structure.

18. The telescoping device of claim 16, wherein, The adjusting assembly further comprises a locking member located on the side of the fixing member away from the corresponding telescopic joint or fixing joint in the telescopic direction; the locking member is threadedly sleeved with the adjusting member to lock the position of the adjusting member relative to the fixing member.

19. A retraction device as claimed in any one of claims 16 to 18, wherein, The telescopic device further comprises a hoisting assembly, the hoisting assembly comprising a hoisting shaft and a hoisting seat connected to the inside of the center joint, the hoisting seat having a first connecting part and a second connecting part spaced apart from each other; the hoisting shaft movably connects the first connecting part and the second connecting part for sleeving the grommet structure of the traction rope; When the hoisting shaft is connected with the first connecting part and the second connecting part at the same time, the grommet structure can be limited between the first connecting part and the second connecting part; when at least one of the first connecting part and the second connecting part is separated from the hoisting shaft, the grommet structure can be sleeved on or removed from the hoisting shaft.

20. The telescoping device of claim 19, wherein, The first connecting part and the second connecting part are each provided with a first insertion hole for inserting both ends of the hoisting shaft; The hoisting assembly further comprises a locking member, the first connecting part and / or the second connecting part being threadedly connected with the locking member; the locking member is used for abutting against the peripheral surface of the hoisting shaft to lock and fix the hoisting shaft with the first connecting part or the second connecting part.

21. The telescoping device of claim 19, wherein, The hoisting seat further has a third connecting part, the first connecting part and the second connecting part being protruded on the same side of the third connecting part; The hoisting assembly further comprises a fixing shaft, the center joint being provided with a second insertion hole and a third insertion hole; the fixing shaft penetrates through the second connecting part, and both ends of the fixing shaft are respectively inserted into the second insertion hole and the third insertion hole to limit and fix the hoisting seat inside the center joint.

22. The telescoping device of claim 21, wherein, The fixing shaft has an end head part and a shaft rod part, the radial dimension of the end head part being greater than that of the shaft rod part; the shaft rod part penetrates through the third connecting part, and one end of the shaft rod part away from the end head part is inserted into the second insertion hole; the third insertion hole is a counterbore hole, and the end head part is accommodated in the third insertion hole; The hoisting assembly further comprises an anti-disengagement member connected to the center joint for blocking the end head part from the side away from the shaft rod part to limit the end head part from disengaging from the third insertion hole.

23. An x-ray imaging system characterized by, The telescopic device comprises an X-ray detector, a processor, a suspension device, a nose device, and the telescopic device according to any one of claims 1-22; wherein: The nose device is connected to the center joint for emitting X-rays to a shooting object; The suspension device comprises a hanger and a traction mechanism, the fixed node is fixedly connected with the hanger; the traction mechanism connects the center node through a traction rope to drive the plurality of telescopic nodes to move relative to the fixed node by winding and unwinding the traction rope, so as to adjust the position of the machine head device in the telescopic direction. The X-ray detector is used for receiving X-rays passing through the shooting object; the processor is in signal connection with the X-ray detector, and is used for processing the X-ray signal output by the X-ray detector and imaging.

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