Tube assembly and suspended DR equipment

Abstract

The ball tube assembly and suspended DR equipment for which protection is sought in this application include a core shaft, a positioning device and a positioning plate. The positioning device is movably mounted on the cross arm, and the positioning device includes a positioning piece. The positioning plate is mounted on the core shaft and fixedly connected to the core shaft, and the positioning plate can rotate relative to the cross arm under the drive of the core shaft, wherein a groove is provided on the positioning plate, and the groove matches the positioning piece setting. When the positioning plate stops rotating, the positioning piece can engage with the groove. In other words, the ball tube assembly utilizes the engagement between the positioning piece and the groove on the positioning plate to achieve positioning of the core shaft when it stops rotating at the expected position. This can achieve positioning of the ball tube assembly when it stops at the preset position, with good repeatability and stable structure. On the other hand, it also simplifies the control system of the ball tube assembly, which has the effect of reducing costs.

Description

Technical Field

[0001] The utility model belongs to the technical field related to medical equipment, and particularly relates to a ball tube assembly and a suspended DR device. Background Art

[0002] DR, the abbreviation of Digital Radiography, is an X-ray imaging device that can directly complete the shooting of X-ray images within a few seconds and display it on a computer screen for doctors to make a diagnosis. When the suspended DR device is working, the tube assembly of the suspended DR device needs to stop accurately at the expected position during the rotation movement along the vertical axis, otherwise it will affect the quality of the pictures taken when the suspended DR device is working.

[0003] At present, there are two main ways to stop and position the tube assembly at the expected position in the existing suspended DR equipment. The first is manual pin-type positioning, and the second is to use a motor to drive the tube assembly to rotate, wherein the motor can use a potentiometer feedback method to control the stop positioning of the tube assembly at the expected position when it is working. Although both of the above methods can achieve the stop positioning of the tube assembly at the expected position, the first method requires manual control by the operator in actual operation, and the operating experience is poor; the second method uses a motor to control the rotation of the tube assembly, which not only makes the control system of the tube assembly complicated, but also increases the cost. Therefore, it is necessary to provide a new implementation method to achieve accurate stop positioning of the tube assembly at the expected position. Utility Model Content

[0004] In view of this, it is necessary to provide a tube assembly and a suspended DR device for solving the above-mentioned technical problems.

[0005] A ball tube assembly, the ball tube assembly comprising:

[0006] Mandrel;

[0007] A positioning device is movably mounted on the cross arm, and the positioning device includes a positioning member;

[0008] A positioning plate, which is sleeved on the core shaft and fixedly connected to the core shaft, and the positioning plate can rotate relative to the cross arm under the drive of the core shaft, wherein a groove is provided on the positioning plate, and the groove matches the positioning member;

[0009] When the positioning plate stops rotating, the positioning member can be snap-fitted with the groove.

[0010] It can be understood that the positioning of the core shaft when it stops rotating at the expected position is achieved by utilizing the snap-fitting between the positioning piece and the groove on the positioning plate. This can, on the one hand, achieve the positioning of the ball tube assembly when it stops at a preset position, with good repeatability and stable structure. On the other hand, it also simplifies the control system of the ball tube assembly, thereby reducing costs.

[0011] In one embodiment, the groove wall of the groove comprises a first groove wall and a second groove wall, and a notch of the groove is formed between the first groove wall and the second groove wall, and the notch can be inserted into the positioning member;

[0012] When the first groove wall or the second groove wall on the positioning plate abuts against the outer periphery of the positioning member and stops rotating, the positioning plate can be adjusted in the circumferential direction under the push of the positioning member, so that the outer periphery of the positioning member abuts against the first groove wall and the second groove wall at the same time, and the positioning member is engaged with the corresponding groove.

[0013] It can be understood that since the positioning plate can drive the core shaft to adjust its position in the circumferential direction under the push of the positioning member, the ball tube assembly can automatically repair the stop position of the core shaft when it is working, so that the ball tube assembly can be accurately positioned when it stops at the expected position with high positioning accuracy.

[0014] In one embodiment, the first groove wall and / or the second groove wall transitions to the outer peripheral wall of the positioning plate in an arc shape.

[0015] It can be understood that by utilizing the arc transition between the first groove wall and / or the second groove wall and the outer peripheral wall of the positioning plate, when the positioning member is rotated under the drive of the core shaft, the transition of the upper periphery of the positioning member between the upper peripheral wall of the positioning plate and the first groove wall and / or the second groove wall can be facilitated. This can reduce the resistance of the positioning plate to the positioning member during the rotation of the core shaft and improve the smoothness of the rotation of the core shaft.

[0016] In one embodiment, the positioning device further comprises a mounting plate and an elastic component, wherein the mounting plate is rotatably mounted on the cross arm, and the elastic component is assembled between the mounting plate and the cross arm in a pre-compressed manner to provide an elastic restoring force when the mounting plate rotates on the cross arm;

[0017] The positioning member is rotatably mounted on the mounting plate, and the outer periphery of the positioning member partially extends outward relative to the mounting plate.

[0018] It can be understood that the elastic restoring force of the elastic component during pre-compression is used to provide the force for the positioning member to push the positioning plate, so that the positioning member can automatically repair the position of the positioning plate when it stops.

[0019] In one embodiment, the elastic component includes a first elastic member and a second elastic member, the first elastic member can provide an elastic restoring force to the mounting plate along a first direction, and the second elastic member can provide an elastic restoring force to the mounting plate along a second direction;

[0020] Wherein, an angle is formed between the first direction and the second direction.

[0021] In one embodiment, one end of the first elastic member and / or the second elastic member abuts against the mounting plate, and the other end abuts against the cross arm and is connected to an adjusting nut;

[0022] Wherein, the mounting position of the adjusting nut on the cross arm can be adjusted.

[0023] It can be understood that the pre-compression amount of the corresponding first elastic member and / or second elastic member can be adjusted by adjusting the installation position of the adjusting nut on the cross arm. This not only facilitates the assembly of the first elastic member and / or the second elastic member, but also ensures that the first elastic member and / or the second elastic member can provide sufficient force to the positioning member through the mounting plate to meet the use requirements of the positioning member to push the positioning plate.

[0024] In one of the embodiments, the tube assembly further comprises a detection sensor, and when the positioning member is engaged with the groove, the detection sensor can be triggered and generate a feedback signal.

[0025] It can be understood that the feedback signal generated when the detection sensor is triggered is used to realize the signal feedback when the positioning plate stops at the expected position, which can meet the use requirements of the automatic control of the ball tube assembly.

[0026] In one embodiment, the ball tube assembly further includes a brake disc and a brake body, wherein the brake disc is sleeved on the core shaft and fixedly connected to the core shaft;

[0027] When the positioning member is engaged with the groove on the positioning disc, the brake body can control the locking / unlocking of the brake disc.

[0028] It can be understood that by utilizing the brake body to lock / unlock the brake disc, the core shaft can be locked / unlocked after the rotation stops when the ball tube assembly is working. This not only achieves the locking of the positioned core shaft to prevent the ball tube assembly from being accidentally triggered, but also allows the core shaft to stop within the entire range of rotational movement and be reliably locked, thus preventing the ball tube assembly from being accidentally triggered.

[0029] In one of the embodiments, the brake body is configured as a permanent magnet brake;

[0030] Alternatively, the brake body is configured as an electromagnetic brake.

[0031] The present application also provides a suspended DR device, comprising a cross arm and the above-mentioned ball tube assembly, wherein the ball tube assembly can perform rotational movement relative to the cross arm;

[0032] Wherein, the positioning device is installed on the cross arm.

[0033] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0034] The tube assembly and suspended DR equipment for which protection is sought in the present application utilize the snap-fitting fit between the positioning piece and the groove on the positioning plate to achieve positioning of the core shaft when it stops rotating at the expected position. This can, on the one hand, achieve positioning of the tube assembly when it stops at a preset position, with good repeatability and stable structure; on the other hand, it also simplifies the control system of the tube assembly, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of a partial structure of a ball tube assembly provided in some embodiments of the present application;

[0037] Figure 2 A schematic diagram of the structure of the ball tube assembly provided in some embodiments of the present application when assembled on the cross arm;

[0038] Figure 3 for Figure 2 Enlarged view of the middle P part;

[0039] Figure 4 A schematic diagram of the structure of the positioning member and the positioning plate provided in some embodiments of the present application when they cooperate with each other;

[0040] Figure 5 for Figure 4 Enlarged view of the middle Q section;

[0041] Figure 6 This is a schematic structural diagram of another state of the positioning plate and the positioning member provided in some embodiments of the present application when they cooperate.

[0042] : Illustration numerals: 100, ball tube assembly; 11, core shaft; 20, positioning device; 21, positioning member; 211, periphery; 22, mounting plate; 221, mounting body; 222, first connecting arm; 223, second connecting arm; 23, elastic assembly; 231, first elastic member; 232, second elastic member; 30, positioning plate; 301, peripheral wall; 31, groove; 310, notch; 311, first groove wall; 312, second groove wall; 313, third groove wall; 40, brake disc; 50, brake body; 60, detection sensor; 101, screw; 200, cross arm; 210, adjusting nut; 220, adjusting rod. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] It should be noted that when an element is referred to as being "provided on" another element, it may be directly provided on the other element or there may be a central element. When an element is considered to be "provided on" another element, it may be directly provided on the other element or there may be a central element at the same time. When an element is considered to be "fixed to" another element, it may be directly fixed to the other element or there may be a central element at the same time.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0046] like Figures 2 to 6As shown, the ball tube assembly 100 provided in one embodiment of the present application includes a spindle 11, a positioning device 20 and a positioning disk 30, wherein the positioning device 20 is movably mounted on the cross arm 200, and the positioning device 20 includes a positioning member 21; the positioning disk 30 is mounted on the spindle 11 and fixedly connected to the spindle 11, and the positioning disk 30 can rotate relative to the cross arm 200 under the drive of the spindle 11, wherein a groove 31 is provided on the positioning disk 30, and the groove 31 matches the positioning member 21; when the positioning disk 30 stops rotating, the positioning member 21 can engage with the groove 31. In other words, the ball tube assembly 100 utilizes the engagement between the positioning member 21 and the groove 31 on the positioning disk 30 to realize the positioning of the spindle 11 when it stops at the expected position. Here, by utilizing the fixed connection between the spindle 11 and the positioning disk 30, the spindle 11 can drive the positioning disk 30 to rotate or stop. It should be noted that, according to the requirements of use, the number of grooves 31 on the positioning plate 30 is configured to be four, and the four grooves 31 are symmetrically arranged in pairs, so that the ball tube assembly 100 has four expected positions where it can stop when working, and can switch between the four expected positions.

[0047] It can be understood that the positioning of the core shaft 11 when it stops rotating at the expected position is achieved by utilizing the snap-fitting between the positioning member 21 and the groove 31 on the positioning plate 30. This can, on the one hand, achieve the positioning of the ball tube assembly 100 when it stops at a preset position, with good repeatability and stable structure. On the other hand, it also simplifies the control system of the ball tube assembly 100, thereby reducing costs.

[0048] like Figures 2 to 6 As shown, the groove wall of the groove 31 on the positioning plate 30 has a first groove wall 311 and a second groove wall 312, and a notch 310 of the groove 31 is formed between the first groove wall 311 and the second groove wall 312, and the notch 310 can be inserted into the positioning member 21; when the first groove wall 311 or the second groove wall 312 on the positioning plate 30 abuts against the outer periphery 211 of the positioning member 21 and stops rotating, the positioning plate 30 can be adjusted under the push of the positioning member 21, so that the outer periphery 211 of the positioning member 21 abuts against the first groove wall 311 and the second groove wall 312 at the same time, and the positioning member 21 is engaged with the corresponding groove 31. This allows the ball tube assembly 100 to automatically repair the stop position of the core shaft 11 when working, so that the ball tube assembly 100 can be accurately positioned when it stops at the expected position, and the positioning accuracy is high. Here, the groove 31 on the positioning plate 30 is configured as a trapezoidal groove. Of course, in other embodiments, the groove 31 on the positioning plate 30 can be configured as an arc groove, which will not be elaborated here.

[0049] It should be noted that when the ball tube assembly 100 is working, when it is necessary to control the ball tube assembly to stop at the expected position, according to the setting of the control program, the core shaft 11 will drive the positioning plate 30 to stop only at the expected position or at a position that is only appropriately offset from the expected position. Obviously, if the offset occurs, the offset will not be large. At this time, the first groove wall 311 or the second groove wall 312 on the positioning plate 30 will separately abut against the outer periphery 211 of the positioning member 21. In this way, the positioning member 21 can push the positioning plate 30 to automatically repair the offset position and achieve accurate positioning of the core shaft 11 when it stops.

[0050] like Figure 2 As shown, in some embodiments, the positioning device 20 further includes a mounting plate 22 and an elastic component 23, wherein the mounting plate 22 is rotatably mounted on the cross arm 200, and the elastic component 23 is pre-compressed and assembled between the mounting plate 22 and the cross arm 200, and is used to provide an elastic restoring force when the mounting plate 22 rotates on the cross arm 200; wherein the positioning member 21 is rotatably mounted on the mounting plate 22, and the outer periphery 211 of the positioning member 21 partially extends outward relative to the mounting plate 22. In other words, the positioning device 20 can use the mounting plate 22 to carry the positioning member 21, and utilize the elastic restoring force of the elastic component 23 itself to increase the force required for the positioning member 21 to push the positioning plate 30, so that the positioning member 21 can automatically repair the position of the positioning plate 30 when it stops, and achieve accurate positioning of the position of the mandrel 11 when it stops. Here, the outer periphery of the positioning member 21 is configured as a circumferential surface, and specifically the positioning member 21 can be configured as a positioning wheel, so that the positioning member 21 can abut against the positioning disk 30 with its circumferential surface, thereby reducing the resistance of the positioning disk 30 to the positioning member 21 during rotation.

[0051] like Figure 2 , Figure 3 As shown, in some embodiments, the elastic component 23 includes a first elastic member 231 and a second elastic member 232, the first elastic member 231 can provide an elastic reset force to the mounting plate 22 along the first direction, and the second elastic member 232 can provide an elastic reset force to the mounting plate 22 along the second direction; wherein an angle is formed between the first direction and the second direction. Here, the first direction is the direction of the plane when the rotation center line of the core shaft 11 and the rotation center line of the positioning member 21 are coplanar, the first direction and the second direction are arranged vertically, the first elastic member 231 and the second elastic member 232 are both configured as springs, wherein the number of the first elastic member 231 is configured as two, the two first elastic members 231 are arranged at intervals along the second direction, and the number of the second elastic member 232 is configured as one. Of course, in other embodiments, the first elastic member 231 and / or the second elastic member 232 can also be configured with a rubber sleeve with high elasticity, a bellows, etc., or the elastic component 23 is configured as a gas spring as a whole.

[0052] It can be understood that in addition to using the first elastic member 231 to push the mounting plate 22 in the first direction, the second elastic member 232 is also used to push the mounting plate 22 in the second direction. This can increase the elastic force on the mounting plate 22 when it is assembled on the cross arm 200, so that the mounting plate 22 can provide a sufficiently large force when driving the positioning member 21 to push the positioning plate 30 in the rotation direction of the mounting plate 22, so as to meet the use requirements of the positioning plate 30 to drive the core shaft 11 to adjust its position.

[0053] like Figure 3 As shown, in some embodiments, the mounting plate 22 includes a mounting body 221, a first connecting arm 222 and a second connecting arm 223, the mounting body 221 is rotatably connected to the cross arm 200, the first connecting arm 222 and the second connecting arm 223 are respectively connected to the mounting body 221, wherein the first elastic member 231 abuts against the first connecting arm 222, and the second elastic member 232 abuts against the second connecting arm 223.

[0054] like Figure 3 As shown, in some embodiments, one end of the first elastic member 231 and / or the second elastic member 232 abuts against the mounting plate 22, and the other end abuts against the cross arm 200 and is connected to an adjusting nut 210; wherein, the mounting position of the adjusting nut 210 on the cross arm 200 can be adjusted. In this way, the pre-compression amount of the corresponding first elastic member 231 and / or the second elastic member 232 can be adjusted, which not only facilitates the assembly of the first elastic member 231 and / or the second elastic member 232, but also ensures that the first elastic member 231 and / or the second elastic member 232 can provide sufficient force to the positioning member 21 through the mounting plate 22, so as to meet the use requirement of the positioning member 21 pushing the positioning plate 30. Here, the first elastic member 231 and the second elastic member 232 both abut against the adjusting nut 210 of the cross arm 200, wherein the adjusting nut 210 is specifically connected to the adjusting rod 220 of the cross arm 200 in a threaded manner, and accordingly, the portions of the first elastic member 231 and the second elastic member 232 away from the mounting plate 22 can be fitted onto the corresponding adjusting rod 220 and abut against the corresponding adjusting nut 210.

[0055] like Figure 5As shown, in some embodiments, the first groove wall 311 and / or the second groove wall 312 transitions with the outer peripheral wall 301 of the positioning plate 30 in an arc shape. In this way, the arc transition between the first groove wall 311 and / or the second groove wall 312 and the outer peripheral wall 301 of the positioning plate 30 is utilized, so that when the positioning plate 30 is driven by the mandrel 11 to rotate, it is convenient to facilitate the transition between the outer periphery 211 of the positioning member 21 and the upper outer peripheral wall 301 of the positioning plate 30 and the first groove wall 311 and / or the second groove wall 312. In this way, the resistance of the positioning plate to the positioning member during the rotation following the mandrel can be reduced, so as to improve the smoothness of the rotation of the mandrel 11. Here, the outer peripheral wall 301 of the positioning plate 30 specifically refers to the remaining portion of the outer peripheral surface of the positioning plate 30 except the groove 31, wherein the first groove wall 311 and the second groove wall 312 respectively transition with the outer peripheral wall 301 of the positioning plate 30 in an arc shape. Of course, in other embodiments, a curved transition may be used between the first groove wall 311 and / or the second groove wall 312 and the outer peripheral wall 301 of the positioning plate 30 , which will not be elaborated herein.

[0056] like Figure 5 As shown, in some embodiments, the groove wall of the groove 31 further has a third groove wall 313, and the first groove wall 311 and the second groove wall 312 are arranged on both sides of the third groove wall 313 and are respectively connected to the third groove wall 313. That is to say, the cross section of the groove 31 on the positioning plate 30 of this implementation example is configured as a trapezoid. Of course, in other embodiments, the shape of the groove 31 on the positioning plate 30 can also be configured as other irregular shapes, as long as the groove wall of the groove 31 has the first groove wall 311 and the second groove wall 312 described above. Here, the first groove wall 311 and the second groove wall 312 are arranged symmetrically with respect to the third groove wall 313.

[0057] like Figure 1 , Figure 2 As shown, in some embodiments, the ball tube assembly 100 further includes a brake disc 40 and a brake body 50. The brake disc 40 is mounted on the spindle 11 and fixedly connected to the spindle 11. When the positioning member 21 is engaged with the groove 31 on the positioning disc 30, the brake body 50 can control the brake disc 40 to lock / unlock, so that not only the positioned spindle 11 can be locked to prevent the ball tube assembly 100 from being triggered by mistake, but also the spindle 11 can be stopped and reliably locked within the entire range of rotational movement, so that the ball tube assembly 100 can be prevented from being triggered by mistake. Here, the brake disc 40, the positioning disc 30 and the spindle 11 can be connected and fixed by screws 101, and the brake body 50 is installed on the cross arm 200.

[0058] like Figure 1 , Figure 2As shown, in some embodiments, the material of the brake disc 40 is configured as ferromagnetic, and the brake body 50 is configured as a permanent magnet brake, so that when the brake disc 40 is separated from the permanent magnet brake, the core shaft 11 can drive the positioning disc 30 and the brake disc 40 to rotate, and when the permanent magnet brake and the brake disc 40 are magnetically attracted, the brake disc 40 can be locked. Since the brake disc 40 is fixedly connected to the core shaft 11, the rotation of the core shaft 11 can be locked. Of course, the brake body 50 is not limited to the permanent magnet brake described above. In other embodiments, the brake body 50 can also be configured as an electromagnetic brake, which will not be elaborated here.

[0059] like Figure 2 As shown, in some embodiments, the ball tube assembly 100 further includes a detection sensor 60. When the outer periphery 211 of the positioning member 21 abuts against the first groove wall 311 and the second groove wall 312 at the same time, the detection sensor 60 can be triggered and generate a feedback signal, so that feedback can be provided when the positioning plate 30 stops at the expected position, so as to meet the use requirements of the automatic control of the ball tube assembly 100. Here, the detection sensor 60 is configured as a micro switch, a laser detection sensor, etc., and can be specifically triggered by the brake disc 40.

[0060] As can be seen from the above, when the ball tube assembly 100 of the present application is working, the brake body 50 can be used to lock the spindle 11 at any position during the rotation process, and the positioning member 21 can be used to push the positioning disk 30 to ensure the accuracy of the position of the spindle 11 when it stops at the expected position, and then the brake body 50 can be used to lock the brake disk 40 to finally achieve the locking of the ball tube assembly 100 when it stops at the expected position. In addition, when the manual movement of the ball tube assembly 100 stops, the brake body 50 is temporarily released from the lock of the brake disk 40, and the positioning member 21 on the positioning device 20 pushes the positioning disk 30 elastically, so that the positioning member 21 can be accurately introduced into the corresponding groove 31 on the positioning disk 30, and the positioning member 21 and the corresponding groove 31 are engaged and matched, so that the ball tube assembly 100 can be automatically repaired if it does not fully enter the expected position, so that the repeated positioning accuracy of the ball tube assembly 100 is high when working.

[0061] like Figure 1 , Figure 2 As shown, the present application also provides a suspended DR device, including a cross arm 200 and the above-mentioned ball tube assembly 100 , wherein the ball tube assembly 100 can perform rotational motion relative to the cross arm 200 .

[0062] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. A tube assembly, characterized in that: The tube assembly (100) comprises: Mandrel (11); A positioning device (20) is movably mounted on the cross arm (200), wherein the positioning device (20) comprises a positioning member (21); A positioning plate (30) is mounted on the core shaft (11) and fixedly connected to the core shaft (11), and the positioning plate (30) can rotate relative to the cross arm (200) under the drive of the core shaft (11), wherein a groove (31) is formed on the positioning plate (30), and the groove (31) is matched with the positioning member (21); When the positioning disc (30) stops rotating, the positioning member (21) can be snap-fitted with the groove (31).

2. The tube assembly according to claim 1, characterized in that: The groove wall of the groove (31) comprises a first groove wall (311) and a second groove wall (312), a notch (310) of the groove (31) is formed between the first groove wall (311) and the second groove wall (312), and the notch (310) can be inserted into the positioning member (21); When the first groove wall (311) or the second groove wall (312) on the positioning plate (30) abuts against the outer periphery (211) of the positioning member (21) and stops rotating, the positioning plate (30) can be adjusted in the circumferential direction under the pushing of the positioning member (21), so that the outer periphery (211) of the positioning member (21) abuts against the first groove wall (311) and the second groove wall (312) at the same time, and the positioning member (21) is engaged with the corresponding groove (31).

3. The tube assembly according to claim 2, characterized in that: The first groove wall (311) and / or the second groove wall (312) transitions to the outer peripheral wall (301) of the positioning plate (30) in an arc shape.

4. The tube assembly according to claim 1, characterized in that: The positioning device (20) further comprises a mounting plate (22) and an elastic component (23), wherein the mounting plate (22) is rotatably mounted on the cross arm (200), and the elastic component (23) is pre-compressedly mounted between the mounting plate (22) and the cross arm (200) to provide an elastic restoring force when the mounting plate (22) rotates on the cross arm (200); The positioning member (21) is rotatably mounted on the mounting plate (22), and the outer periphery (211) of the positioning member (21) partially protrudes outward relative to the mounting plate (22).

5. The tube assembly according to claim 4, characterized in that: The elastic component (23) comprises a first elastic member (231) and a second elastic member (232), wherein the first elastic member (231) can provide an elastic restoring force to the mounting plate (22) along a first direction, and the second elastic member (232) can provide an elastic restoring force to the mounting plate (22) along a second direction; Wherein, an angle is formed between the first direction and the second direction.

6. The tube assembly according to claim 5, characterized in that: One end of the first elastic member (231) and / or the second elastic member (232) abuts against the mounting plate (22), and the other end abuts against the cross arm (200) and is connected to an adjusting nut (210); Wherein, the installation position of the adjusting nut (210) on the cross arm (200) can be adjusted.

7. The tube assembly according to claim 1, characterized in that: The tube assembly (100) further comprises a detection sensor (60), and when the positioning member (21) is engaged with the groove (31), the detection sensor (60) can be triggered and generate a feedback signal.

8. The tube assembly according to claim 1, characterized in that: The ball tube assembly (100) further comprises a brake disc (40) and a brake body (50), wherein the brake disc (40) is sleeved on the core shaft (11) and fixedly connected to the core shaft (11); When the positioning member (21) is engaged with the groove (31) on the positioning disc (30), the brake body (50) can control the locking / unlocking of the brake disc (40).

9. The tube assembly according to claim 8, characterized in that: The brake body (50) is configured as a permanent magnet brake; Alternatively, the brake body (50) is configured as an electromagnetic brake.

10. A suspended DR device, characterized in that: A device comprising a cross arm (200) and a tube assembly (100) according to any one of claims 1 to 9, wherein the tube assembly (100) is capable of rotating relative to the cross arm (200); Wherein, the positioning device (20) is installed on the cross arm (200).

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