Patent Description:
In the medical field, medical imaging devices are often used to emit rays to examine patients radiologically and generate images. Medical staffs make medical diagnosis by observing images. In order to facilitate the medical staff to operate the X-ray tube assembly on the medical imaging device to examine patients, the X-ray tube assembly is mounted on a column, and a ground rail is provided on the ground near the medical imaging device. The column can slide along the ground rail so as to drive the X-ray tube assembly to slide. However, the alignment process of the medical imaging device is complex.

<CIT> discloses an X-ray examination apparatus, comprising a frame, a patient examination table, slidably connected to the frame a guide rail extending in a longitudinal direction a column, movable on the guide rail in the longitudinal direction, and an X-ray source on the column. The X-ray examination apparatus further comprises a carriage, movable on the frame in the longitudinal direction, the guide rail being movable on the carriage in the longitudinal direction; and linkage means for assuring that when the carriage, the guide rail, or the column are moved relative to the frame, the guide rail is moved in the same direction as the carriage but at twice the distance relative to the frame, and the column is moved in the same direction as the carriage but at three times the distance relative to the frame.

<CIT> and <CIT> show, respectively, a further X-ray apparatus.

An object of the invention is to provide a medical imaging device according to claim <NUM>. Preferred embodiments are included as dependent claims.

An object of the disclosure is to provide a medical imaging device, which has the advantages of simple alignment process and high mounting efficiency.

The disclosure provides a medical imaging device, including: a sliding seat, a bracket, a column and an X-ray tube assembly. The sliding seat is fixedly arranged on a bed of the medical imaging device, and the sliding seat has a slideway extending along a length direction of the bed. The bracket is provided with a moving component and a restraining member. The moving component moves along the slideway, and the restraining member is fitted with the sliding seat to limit a displacement of the bracket in a width direction of the bed. The column is vertically arranged on the bracket. The X-ray tube assembly is arranged on the column. The sliding seat includes a rail seat body. The rail seat body is provided with a bottom edge, a connecting edge, a top edge and a bend edge that are connected sequentially. The bottom edge and the top edge are arranged opposite to each other. The connecting edge and the bend edge are opposite to each other and both perpendicular to the bottom edge. The bottom edge, the connecting edge, the top edge and the bend edge together form the slideway, and the moving component is located in the slideway and contacts the bottom edge. The medical imaging device further includes a first auxiliary support member. The first auxiliary support member is located in the slideway. Along a height direction of the bed, a distance between the first auxiliary support member and a bottom surface of the slideway is a first distance, and a distance between the first auxiliary support member and a top surface of the slideway is a second distance. The second distance is configured such that when the X-ray tube assembly rotates around a central axis of the column to make the column have a tendency to overturn, the first auxiliary support member is capable of abutting against the top edge.

According to the medical imaging device provided by embodiments of the disclosure, the sliding seat is fixedly arranged on the bed. The sliding seat has the slideway extending along the length direction of the bed. The bracket for the arrangement of the column is provided with the moving component. The moving component moves along the slideway, that is, the sliding seat that provides the slideway for the column to slide is mounted on the bed. In this way, the sliding seat and the bed are integrated into a whole. Therefore, during the alignment of the medical imaging device, it is only required to make the bed horizontal, which simplifies the alignment process and thereby is beneficial to reduce the mounting time and improve the mounting efficiency.

In some embodiments, along a height direction of the bed, there is a gap between the moving component and a top surface of the slideway.

In some embodiments, the moving component includes two first support bearings. The two first support bearings are spaced apart along the length direction of the bed.

In some embodiments, a dodging opening is formed between the bend edge and the bottom edge. The moving component is connected to the bracket through a connecting member. The dodging opening is configured to allow the connecting member to pass through, and a size of the moving component along a height direction of the bed is greater than a size of the dodging opening along the height direction of the bed.

In some embodiments, the first auxiliary support member includes two first rolling bearings. The two first rolling bearings are spaced apart along the length direction of the bed, and the first rolling bearings are connected to the bracket through a first eccentric shaft such that the second distance is adjustable.

In some embodiments, the sliding seat further includes a cylinder. The cylinder extends along the length direction of the bed. The restraining member includes a pair of first abutting members and a pair of second abutting members. The first abutting members are located on a front side of the cylinder away from the column and abut against the cylinder, or the first abutting members are located on a front side of the bend edge away from the column and abut against the bend edge. The second abutting members are located on a rear side of the cylinder near the column and abut against the cylinder, or the second abutting members are located on a rear side of the bend edge near the column and abut against the bend edge.

In some embodiments, the cylinder is located above the rail seat body, the first abutting members abut against the cylinder, and the second abutting members abut against the bend edge. The medical imaging device further includes a second auxiliary support member and a third auxiliary support member. The second auxiliary support member is located on the rear side of the cylinder, and along the width direction of the bed, a distance between the second auxiliary support member and the cylinder is a third distance. The third auxiliary support member is located on the front side of the bend edge and in the slideway, and along the width direction of the bed, a distance between the third auxiliary support member and the bend edge is a fourth distance.

The third distance and the fourth distance are configured such that when the X-ray tube assembly receives an acting force to make the column have a tendency to overturn, the second auxiliary support member is capable of abutting against the cylinder and the third auxiliary support member is capable of abutting against the bend edge.

In some embodiments, the second auxiliary support member includes two second rolling bearings. The two second rolling bearings are spaced apart along the length direction of the bed, and the second rolling bearings are connected to the bracket through a second eccentric shaft such that the third distance is adjustable. The third auxiliary support member includes two third rolling bearings. The two third rolling bearings are spaced apart along the length direction of the bed, and the third rolling bearings are connected to the bracket through a third eccentric shaft such that the fourth distance is adjustable.

In some embodiments, the bracket includes a support plate, and a first mounting plate and a second mounting plate that are perpendicularly connected to the support plate. The first abutting members and the second auxiliary support member are fixed to the first mounting plate, and the second abutting members and the third auxiliary support member are fixed to the second mounting plate.

In some embodiments, the medical imaging device further includes a fourth auxiliary support member fixedly arranged on the bracket. The fourth auxiliary support member is located on the rear side of the bend edge and abuts against the bend edge, or the fourth auxiliary support member is located on the rear side of the cylinder and abuts against the cylinder.

In some embodiments, the sliding seat further includes a supporting table fixedly arranged on the bed. The cylinder and the rail seat body are both fastened and connected to the supporting table. One of the cylinder and the rail seat body is connected to a top surface of the supporting table, and the other is connected to a bottom surface of the supporting table.

The embodiments of the disclosure will be described in detail below with reference to the accompanying drawings, so that the above and other features and advantages of the disclosure will be made clearer to those of ordinary skill in the art. In the figures:.

In order to have a clearer understanding of the technical features, objects and effects of the disclosure, specific implementations of the disclosure will be described with reference to the accompanying drawings, in which the same reference numerals denote the same parts.

Here, "schematic" means "serving as a case, example, or illustration", and any illustration or implementation described herein as "schematic" should not be interpreted as a more preferred or more advantageous technical solution.

For the sake of brevity, only the parts related to the disclosure are schematically shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, for the components having the same structure or function in some drawings, only one of them is schematically illustrated, or only one of them is marked.

"One" herein not only means "only one", but also means "more than one". "First" and "second" are only used to distinguish each other, not to indicate their importance and sequence, or the premise of their mutual existence, etc..

It should be noted that the directional indications (such as on, under, left, right, front, rear,. ) in the embodiments of the disclosure are used merely to explain the relative position relationship, movement, etc. between the components in a particular attitude (as shown in the accompanying drawings), and if the particular attitude changes, the directional indications change accordingly.

In the disclosure, unless otherwise explicitly specified and defined, the terms "connection", "fixation" and the like shall be understood broadly. For example, the "fixation" may be a fixed connection, a detachable connection or integration; or may be a mechanical connection or an electrical connection; or may be a direct connection, an indirect connection through an intermediate medium, or an internal communication between two components or interaction between two components, unless otherwise specified. For those of ordinary skill in the art, the specific meaning of the above terms in the disclosure can be understood according to specific situations.

<FIG> is a schematic front view of a medical imaging device 100a in the related art. <FIG> is a schematic top view of the medical imaging device 100a in the related art. Referring to <FIG>, in an example of the related art, the medical imaging device 100a includes a bed 110a, a column 170a, a ground rail 190a and an X-ray tube assembly 180a. The ground rail 190a is arranged on the ground near the bed 110a and extends along a length direction of the bed 110a. The column 170a is slidably arranged on the ground rail 190a. The X-ray tube assembly 180a is arranged on the column 170a. In this way, the column 170a can slide along the ground rail 190a so as to drive the X-ray tube assembly 180a to slide.

However, the inventors found that after the medical imaging device 100a is assembled, during the adjustment, it is required not only to make bed 110a and the ground rail 190a horizontal separately, but also to calibrate the accuracy between the bed 110a and the ground rail 190a. This leads to complex adjustment process, long mounting time and low mounting efficiency of the medical imaging device 100a. In addition, in order to ensure high stability of the medical imaging device 100a, the medical imaging device is further provided with a support structure for supporting the ground rail 190a and the column 170a, which leads to complex structure and high manufacturing cost of the medical imaging device 100a. After careful study, the inventors found that the main reason for the above problems of the medical imaging device 100a is that the ground rail 190a and the bed 110a are separated, so they need to be supported and aligned separately.

In view of this, the inventors have come up with a medical imaging device. In this medical imaging device, the column is mounted on the bracket, the bracket is provided with a moving component, and a sliding seat fitted with the moving component is fixedly arranged on the bed, rather than being independent of the bed. Further, the inventors also have found that the medical imaging device is unstable in use. Therefore, the inventors design the medical imaging device to further have a restraining member, so as to ensure that the bracket can move only along the length direction of the bed. The medical imaging device in the disclosure can be various X-ray medical imaging devices, especially X-ray medical imaging devices containing a bed.

The implementation manners of the medical imaging device provided by embodiments of the disclosure will be described in detail below in conjunction with accompanying drawings.

<FIG> is a schematic structure diagram of a medical imaging device <NUM> when an X-ray tube assembly <NUM> is in a working position according to an embodiment of the disclosure. <FIG> is a schematic diagram of the medical imaging device <NUM> shown in <FIG> with part of the structure omitted. <FIG> is a schematic diagram of the medical imaging device <NUM> shown in <FIG> when a sliding seat <NUM> is fitted with a bracket. Referring to <FIG>, the medical imaging device <NUM> includes a bed <NUM>, a sliding seat <NUM>, a bracket <NUM>, a column <NUM> and an X-ray tube assembly <NUM>. The bed <NUM> is fixed to the ground. The bed <NUM> is available for the patient to lie flat. The sliding seat <NUM> is fixedly arranged on the bed <NUM>. The bracket <NUM> is connected to the sliding seat <NUM>. The column <NUM> is vertically arranged on the bracket <NUM>. The X-ray tube assembly <NUM> is arranged on the column <NUM>.

The bracket <NUM> can slide along a length direction (X direction in <FIG>) of the bed <NUM> relative to the sliding seat <NUM>, so that the column <NUM> and the X-ray tube assembly <NUM> can move along the X direction. The column <NUM> can rotate around its central axis relative to the bracket <NUM>, so that the X-ray tube assembly <NUM> can rotate around the central axis of the column <NUM>. The X-ray tube assembly <NUM> can slide up and down along a height direction (Z direction in <FIG>) of the bed <NUM> relative to the column <NUM>. In this way, medical staff can conveniently move the X-ray tube assembly <NUM> to a proper position so as to examine the patient. It should be understood that the X-ray tube assembly <NUM> has a working position and an idle position. In <FIG>, when the X-ray tube assembly <NUM> is in the working position, an orthographic projection of the X-ray tube assembly in the Z direction may fall on the bed <NUM>. When the patient lies on the bed <NUM>, X-rays emitted downward from the X-ray tube assembly <NUM> can be projected onto the patient's body, thereby examining the patient.

The bracket <NUM> can slide along the X direction relative to the sliding seat <NUM> in the following specific implementations:
In a first example, referring to <FIG>, the sliding seat <NUM> is arranged on one side of the bed <NUM> along its width direction (Y direction in <FIG>). The sliding seat <NUM> includes a rail seat body <NUM>. The rail seat body <NUM> is configured to have a groove extending along the X direction, and the groove forms a slideway. The bracket <NUM> is provided with a first support bearing <NUM>. The first support bearing <NUM> moves along the slideway on the rail seat body <NUM>. The bracket <NUM> slides along the slideway along with the first support bearing <NUM>. <FIG> is a schematic structure diagram of the bracket <NUM> in <FIG>.

In a second example, referring to <FIG>, the sliding seat <NUM> may be a blocky structure. The sliding seat <NUM> is provided with a groove extending along the X direction, and the groove forms a slideway <NUM>. The bracket <NUM> is provided with a first support bearing <NUM>. The first support bearing <NUM> contacts the groove and slides along the slideway <NUM>. The bracket <NUM> slides along the slideway <NUM> along with the first support bearing <NUM>. <FIG> is a schematic diagram of a medical imaging device <NUM> of another embodiment when the sliding seat <NUM> is fitted with the bracket <NUM>.

It should be noted that in the above two examples, the first support bearing <NUM> may be a sliding bearing, and in this case, the first support bearing <NUM> slides in the slideway <NUM> so as to drive the bracket <NUM> to move along the X direction. Alternatively, the first support bearing <NUM> may also be a rolling bearing, and in this case, the first support bearing <NUM> rolls in the slideway <NUM> so as to drive the bracket <NUM> to move along the X direction. In the above two examples, the first support bearing <NUM> may also be replaced with a roller wheel, and the roller wheel rolls in the slideway <NUM> so as to drive the bracket <NUM> to move along the X direction. The number of the first support bearings <NUM> may be two.

Based on the above, the medical imaging device <NUM> of this embodiment has the sliding seat <NUM> and the bracket <NUM>. The sliding seat <NUM> is provided with the slideway <NUM> extending along the X direction (for example, the groove formed in the rail seat body <NUM>, or the groove formed in the sliding seat <NUM> in <FIG>). The bracket <NUM> is provided with a moving component <NUM>. The moving component <NUM> may include the two first support bearings <NUM> or the two roller wheels spaced apart along the X direction. In the implementation where the moving component <NUM> includes the two first support bearings <NUM>, the two first support bearings <NUM> can move in the slideway <NUM> in a sliding or rolling manner, thereby driving the bracket <NUM> and the column <NUM> to move. In the implementation where the moving component <NUM> includes the two roller wheels, the two roller wheels roll in the slideway <NUM> so as to drive the bracket <NUM> and the column <NUM> to move along the slideway <NUM>.

It should be understood that since the number of the first support bearings <NUM> is two, the two first support bearing <NUM> each have a contact point with the slideway <NUM>, the two contact points can form a straight line, and the contact reference of the moving component <NUM> with the slideway <NUM> is line contact. Therefore, the straightness of the motion path of the moving component <NUM> can be ensured, so that the column <NUM> can smoothly slide along a straight line, thereby reducing the probability of the moving component <NUM> getting stuck, which may cause unsmooth sliding of the X-ray tube assembly <NUM> and bring bad experience to the patient.

In a third example, referring to <FIG>, the sliding seat <NUM> may be a blocky structure. The sliding seat <NUM> is provided with a guide rail bar <NUM> extending along the X direction. The slideway <NUM> is formed on the guide rail bar <NUM>. The moving component <NUM> may be a sliding block <NUM>. The sliding block <NUM> is slidably mounted on the guide rail bar <NUM>. The sliding block <NUM> slides along the guide rail bar <NUM> so as to drive the bracket <NUM> to move along the X direction. <FIG> is a schematic diagram of a medical imaging device <NUM> of yet another embodiment when the sliding seat <NUM> is fitted with the bracket <NUM>. It can be understood that in some embodiments, the sliding block <NUM> may be replaced with a slide rail fitted with the guide rail bar <NUM>, which is not limited in this embodiment. Specifically, the guide rail bar <NUM> is commercially available, and thus, is easy to obtain.

It should be understood that the moving component <NUM> contacts the slideway <NUM>, and the sliding seat <NUM> also supports the moving component <NUM> so as to support the bracket <NUM>, the column <NUM> and the X-ray tube assembly <NUM>. The following description is an example in which the sliding seat <NUM> includes the rail seat body <NUM>, the slideway <NUM> is the groove formed in the rail seat body <NUM> and the moving component <NUM> includes the first support bearings <NUM>.

In addition, referring to <FIG>, the bracket <NUM> is further provided with a restraining member <NUM>, and the restraining member <NUM> is fitted with the sliding seat <NUM> to limit a displacement of the bracket <NUM> in the Y direction. This can ensure the bracket <NUM> to move only along the X direction as much as possible, which helps in reducing the possibility of overturning or shaking of the column <NUM> due to the movement of the bracket <NUM> along the Y direction, thereby improving the stability of the column <NUM>. In this way, the X-rays emitted from the X-ray tube assembly <NUM> in the working position can be stably projected onto the bed <NUM> as much as possible, so that high-quality images can be obtained.

Based on the above, according to the medical imaging device <NUM> of this embodiment, the sliding seat <NUM> is fixedly arranged on the bed <NUM>, the sliding seat <NUM> has the slideway <NUM> extending along the X direction, the bracket <NUM> for the arrangement of the column <NUM> is provided with the moving component <NUM>, and the moving component <NUM> moves along the slideway <NUM>. Thus, in the medical imaging device <NUM>, the sliding seat <NUM> that provides the slideway <NUM> for the column <NUM> to slide is mounted on the bed <NUM>. In this way, the sliding seat <NUM> and the bed <NUM> are integrated into a whole. Therefore, during the alignment of the medical imaging device <NUM>, it is only required to make the bed <NUM> horizontal, which simplifies the alignment process and thereby is beneficial to reduce the mounting time and improve the mounting efficiency. Moreover, there is no need to provide an additional support structure to support the sliding seat <NUM>, which avoids increasing the components, thereby avoiding complicating the structure of the medical imaging device <NUM> and helping in avoiding an increase in the manufacturing cost.

<FIG> is a schematic diagram of <FIG> when the sliding seat <NUM> is fitted with the bracket <NUM>. <FIG> is a partial schematic diagram of <FIG> when the rail seat body <NUM> is fitted with the bracket <NUM>. Referring to <FIG>, when the sliding seat <NUM> includes the rail seat body <NUM>, the rail seat body <NUM> is provided with a bottom edge <NUM>, a connecting edge <NUM>, a top edge <NUM> and a bend edge <NUM> that are connected sequentially. The bottom edge <NUM> and the top edge <NUM> are arranged opposite to each other. The connecting edge <NUM> and the bend edge <NUM> are opposite to each other and both perpendicular to the bottom edge <NUM>. The connecting edge <NUM> is located on the same side of the bottom edge <NUM> and the top edge <NUM>. The bottom edge <NUM>, the connecting edge <NUM>, the top edge <NUM> and the bend edge <NUM> together form the slideway <NUM>.

Further, the rail seat body <NUM> may be further provided with a first edge <NUM>, a second edge <NUM> and a third edge <NUM> connected sequentially. An end of the first edge <NUM> away from the second edge <NUM> is connected to an end of the bottom edge <NUM> away from the connecting edge <NUM>. The first edge <NUM> is closely attached to the bottom edge <NUM>, the second edge <NUM> is closely attached to the connecting edge <NUM>, and the third edge <NUM> is closely attached to the top edge <NUM>. This can increase the structural strength of the rail seat body <NUM>, thereby improving the stability of the first support bearing <NUM> and the bracket <NUM>. In this embodiment, all the edges constituting the rail seat body <NUM> together form the slideway <NUM>. It should be understood that the rail seat body <NUM> may be a sheet metal structure, which is made by bending many times. Exemplarily, a flat plate may be folded once first, so that the first part and the second part of the flat plate are stacked along the thickness direction of the flat plane and the third part of the flat plate protrudes; the third part is bent to obtain the bend edge <NUM>; and the first part and the second part are bent twice.

In an example shown in <FIG>, an end of the bend edge <NUM> away from the top edge <NUM> does not contact the bottom edge <NUM>, so that a dodging opening is formed between the bend edge <NUM> and the bottom edge <NUM>. The dodging opening can dodge the connecting member <NUM>, so that the connecting member <NUM> can pass through the dodging opening so as to connect the first support bearing <NUM> with the bracket <NUM>. Moreover, a size H1 of the first support bearing <NUM> along the Z direction is greater than a size H2 of the dodging opening along the Z direction, so that the first support bearing <NUM> cannot pass through the dodging opening, which prevents the first support bearing <NUM> from coming out of the dodging opening. Thus, the first support bearing <NUM> can remain fitted with the slideway <NUM>, and the sliding seat <NUM> can support the bracket <NUM>, thereby ensuring the sustained use of the medical imaging device <NUM>.

As shown in <FIG>, along the Z direction, there is a gap between the first support bearing <NUM> and a top surface of the slideway <NUM>. In this way, the first support bearing <NUM> only contacts a bottom surface of the slideway <NUM> and does not contact the top surface of the slideway <NUM>, thereby reducing the possibility of the first support bearing <NUM> getting stuck due to the contact of the first support bearing <NUM> with both the bottom surface and the top surface of the slideway <NUM>. Thus, the bracket <NUM> and the column <NUM> can smoothly slide along the slideway <NUM>.

<FIG> is a schematic cross-sectional view of <FIG> when the sliding seat <NUM> is fitted with the bracket <NUM>. Referring to <FIG> and <FIG>, a groove is formed in the sliding seat <NUM>. When the groove is formed as the slideway <NUM>, the bracket <NUM> is further provided with a first auxiliary support member <NUM>. The first auxiliary support member <NUM> is located in the slideway <NUM>. When the X-ray tube assembly <NUM> is in the working position, the first auxiliary support member <NUM> has a first distance d1 (d1><NUM>) from the bottom surface of the slideway <NUM> in the Z direction. The first auxiliary support member <NUM> has a second distance d2 (d2><NUM>) from the top surface of the slideway <NUM> in the Z direction. The first distance d1 and the second distance d2 may be designed to be the same or different, for example, d2<d1. When the X-ray tube assembly <NUM> is in the working position, its center of gravity is directly in front of the central axis of the column <NUM>, and the first auxiliary support member <NUM> contacts neither the top surface of the slideway <NUM> nor the bottom surface of the slideway <NUM>, that is, the first auxiliary support member <NUM> does not function as a support. At this time, the column <NUM> may be regarded as being in a balanced state. Here, the front side refers to a side of the column <NUM> facing the bed <NUM> along the Y direction (denoted by arrow F in <FIG>). Accordingly, the rear side refers to a side of the column <NUM> facing away from the bed <NUM> along the Y direction (denoted by arrow R in <FIG>), and the left side and the right side are two sides of the column <NUM> along the X direction.

The second distance d2 is further configured such that when the X-ray tube assembly <NUM> rotates around the central axis of the column <NUM> to make the column <NUM> have a tendency to overturn, the first auxiliary support member <NUM> is capable of abutting against the top surface of the slideway <NUM>. It should be understood that after the medical staff finishes examining the patient, they may operate the X-ray tube assembly <NUM> in the working position to rotate around the central axis of the column <NUM> along the counterclockwise or clockwise direction, for example, by <NUM>°, so that the X-ray tube assembly <NUM> moves away from the bed <NUM> to the idle position, which prevents a stand-up patient from hitting the X-ray tube assembly <NUM>. When the X-ray tube assembly <NUM> is rotated by <NUM>° from the working position, the center of gravity of the X-ray tube assembly <NUM> deviates to the left side or the right side of the column <NUM>, and the column <NUM> loses its balance, so that the column <NUM> and the bracket <NUM> connected to the column <NUM> tilt to the left side or the right side correspondingly. With this design of this embodiment, when the column <NUM> and the bracket <NUM> tilt to the left side or the right side, the bracket <NUM> drives the first support bearing <NUM> and the first auxiliary support member <NUM> to tilt, the first support bearing <NUM> is out of contact with the bottom surface of the slideway <NUM>, and the first auxiliary support member <NUM> abuts against the top surface of the slideway <NUM>. Since the sliding seat <NUM> is fixed to the bed <NUM>, due to the limit of the sliding seat <NUM>, the first auxiliary support member <NUM>, the bracket <NUM> and the column <NUM> cannot tilt further.

Thus, when the X-ray tube assembly <NUM> is in the working position, the first auxiliary support member <NUM> contacts neither the top surface nor the bottom surface of the slideway <NUM>, thereby preventing the first support bearing <NUM> from getting stuck. Moreover, the first auxiliary support member <NUM> can avoid the risk of the column <NUM> overturning due to the change of the center of gravity of the X-ray tube assembly <NUM> after its position changes, so that the column <NUM> and the X-ray tube assembly <NUM> have high stability.

In this embodiment, the second distance d2 can be designed reasonably according to the model and size of the column <NUM> and the X-ray tube assembly <NUM> in the medical imaging device <NUM>. For example, when the X-ray tube assembly <NUM> has a large weight, even if it rotates by a small angle, the column <NUM> will have a tendency to overturn. In this case, the second distance d2 should be smaller. Therefore, the second distance d2 can be small, so that when the column <NUM> tilts slightly after the center of gravity of the X-ray tube assembly <NUM> changes due to its position change, the first auxiliary support member <NUM> can abut against the top surface of the slideway <NUM>, thereby preventing the column <NUM> from tilting seriously.

According to the example shown in <FIG> and <FIG>, the first auxiliary support member <NUM> may specifically include two first rolling bearings. The two first rolling bearings are spaced apart along the X direction. An inner ring of the first rolling bearing is sleeved on one end of a first eccentric shaft <NUM>, and the other end of the first eccentric shaft <NUM> is connected to the bracket <NUM> through a screw member. In this way, after the screw member is loosened, the second distance d2 can be adjusted by screwing the first eccentric shaft <NUM>. Thus, the second distance d2 can be flexibly designed to better adapt to the actual working conditions. For example, when the X-ray tube assembly <NUM> has a large weight, the second distance d2 can be decreased. When the X-ray tube assembly <NUM> has a small weight, the second distance d2 can be increased. Of course, the first rolling bearings may also be replaced with other types of bearing structures or blocky structures.

The fit between the restraining member <NUM> and the sliding seat <NUM> will be described in detail below. The restraining member <NUM> may include a first abutting member <NUM> and a second abutting member <NUM>. Along the Y direction, the first abutting member <NUM> and the second abutting member <NUM> are spaced apart.

For example, the first abutting member <NUM> may be located on a front side of the bend edge <NUM> and abut against the bend edge <NUM>, and the second abutting member <NUM> may be located on a rear side of the bend edge <NUM> and abut against the bend edge <NUM>. That is, the restraining member <NUM> abuts against the front side and the rear side of the bend edge <NUM> at the same time, so that the bend edge <NUM> restrains a displacement of the restraining member <NUM> in the Y direction.

For another example, as shown in <FIG>, the sliding seat <NUM> may be further provided with a cylinder <NUM>. The cylinder <NUM> extends along the X direction. The first abutting member <NUM> may be located on a front side of the cylinder <NUM> and abut against the cylinder <NUM>, and the second abutting member <NUM> may be located on a rear side of the cylinder <NUM> and abut against the cylinder <NUM>. That is, the restraining member <NUM> abuts against the front side and the rear side of the cylinder <NUM> at the same time, so that the cylinder <NUM> restrains a displacement of the restraining member <NUM> in the Y direction.

For still another example, as shown in <FIG>, the sliding seat <NUM> may be further provided with a cylinder <NUM>. The cylinder <NUM> extends along the X direction. The first abutting member <NUM> may be located on a front side of the cylinder <NUM> and abut against the cylinder <NUM>, and the second abutting member <NUM> may be located on a rear side of the bend edge <NUM> and abut against the bend edge <NUM>. In this case, the cylinder <NUM> prevents the restraining member <NUM> from moving to the rear side, and the bend edge <NUM> prevents the restraining member <NUM> from moving to the front side. Alternatively, in other embodiments, the first abutting member <NUM> may be located on a front side of the bend edge <NUM> and abut against the bend edge <NUM>, and the second abutting member <NUM> may be located on a rear side of the cylinder <NUM> and abut against the cylinder <NUM>. In this case, the bend edge <NUM> prevents the restraining member <NUM> from moving to the rear side, and the cylinder <NUM> prevents the restraining member <NUM> from moving to the front side.

With such design, the restraining member <NUM> can be fitted with the sliding seat <NUM> in many ways. Moreover, on the basis of the restraining member <NUM> abutting against the sliding seat <NUM>, the sliding seat <NUM> can also support the bracket <NUM> along the Y direction. Here a cross-sectional shape of the cylinder <NUM> is not limited to the rectangle shown in <FIG>, and may also be a circle or other shapes.

The number of the first abutting members <NUM> may be two. Thus, the first abutting members <NUM> have two contact points with the bend edge <NUM> or the cylinder <NUM>, the two contact points can form a straight line, and the contact reference of the first abutting members <NUM> with the bend edge <NUM> or the cylinder <NUM> is line contact. Therefore, the first abutting members <NUM> have a high contact accuracy with the bend edge <NUM> or the cylinder <NUM>, and the first abutting members <NUM> are in good contact with the bend edge <NUM> or the cylinder <NUM>. Similarly, the number of the second abutting members <NUM> may also be two. Then, the second abutting members <NUM> have a high contact accuracy with the bend edge <NUM> or the cylinder <NUM>, and are in good contact with the bend edge <NUM> or the cylinder <NUM>.

Still referring to <FIG>, in the implementation where the cylinder <NUM> is located above the rail seat body <NUM>, the first abutting member <NUM> is located on the front side of the cylinder <NUM> and abuts against the cylinder <NUM> and the second abutting member <NUM> is located on the rear side of the bend edge <NUM> and abuts against the bend edge <NUM>, the medical imaging device <NUM> may further include a second auxiliary support member <NUM> and a third auxiliary support member <NUM>. The second auxiliary support member <NUM> is located on the rear side of the cylinder <NUM>, a distance between the second auxiliary support member <NUM> and the cylinder <NUM> along the Y direction is a third distance d3. The third auxiliary support member <NUM> is located on the front side of the bend edge <NUM>, the third auxiliary support member <NUM> is located in the slideway <NUM>, and a distance between the third auxiliary support member <NUM> and the bend edge <NUM> along the Y direction is a fourth distance d4.

The third distance d3 and the fourth distance d4 are configured such that when an acting force is applied to the X-ray tube assembly <NUM> to make the column <NUM> have a tendency to overturn, the second auxiliary support member <NUM> is capable of abutting against the cylinder <NUM> and the third auxiliary support member <NUM> is capable of abutting against the bend edge <NUM>.

It should be understood that after the patient lies on the bed <NUM>, when the medical staff examines the patient, they may apply a downward acting force on the X-ray tube assembly <NUM> in the working position, so that the X-ray tube assembly <NUM> slides downward along the column <NUM> to be close to the patient. Due to the large height of the column <NUM>, when a large acting force is applied to the X-ray tube assembly <NUM> suspended on the top of the column <NUM>, the column <NUM> may easily lose its balance and tilt to the front side. With this design of this embodiment, when the column <NUM> tilts to the front side, the bracket <NUM> tilts forward along with the column <NUM>, the first abutting member <NUM> is separated from the cylinder <NUM>, and the second abutting member <NUM> is separated from the bend edge <NUM>. The second auxiliary support member <NUM> abuts against the cylinder <NUM> forward, and the third auxiliary support member <NUM> abuts against the bend edge <NUM> backward. Therefore, due to the limit of the cylinder <NUM> to the second auxiliary support member <NUM> and the limit of the bend edge <NUM> to the third auxiliary support member <NUM>, the column <NUM> and the bracket <NUM> cannot tilt forward further.

In this way, when the medical staff operate the X-ray tube assembly <NUM> in the working position to move down, the second auxiliary support member <NUM> and the third support member can prevent the column <NUM> from tilting forward, so that the column <NUM> and the X-ray tube assembly <NUM> have high stability in use.

Of course, when the medical imaging device <NUM> is in actual use, after finishing examining the patient, the medical staff may also apply an upward acting force to the X-ray tube assembly <NUM>, so that the X-ray tube assembly <NUM> moves upward.

In this embodiment, the third distance d3 and the fourth distance d4 can be designed reasonably according to the model and size of the column <NUM> and the X-ray tube assembly <NUM> in the medical imaging device <NUM>. For example, when the column <NUM> is long and thin, the X-ray tube assembly <NUM> receives a smaller acting force, and at this time, the column <NUM> has a tendency to overturn. In this case, the third distance d3 and the fourth distance d4 should be smaller.

Both the third distance d3 and the fourth distance d4 are smaller, and are further configured such that when the column <NUM> tilts forward slightly, the second auxiliary support member <NUM> is capable of abutting against the cylinder <NUM>, and the third auxiliary support member <NUM> is capable of abutting against the bend edge <NUM>, thereby preventing the column <NUM> from tilting seriously. The third distance d3 and the fourth distance d4 may be the same or different. When the third distance d3 and the fourth distance d4 are different, the third distance d3 may be designed to be less than the fourth distance d4. This is because the third auxiliary support member <NUM> is located in the slideway <NUM>. By designing the fourth distance d4 to be slightly greater than the third distance d3, when the fourth distance d4 is adjustable, the fourth distance d4 can be adjusted more conveniently.

Further, according to the example shown in <FIG>, the bracket <NUM> may specifically include a support plate <NUM>, a first mounting plate <NUM> and a second mounting plate <NUM>. The first mounting plate <NUM> and the second mounting plate <NUM> are perpendicularly connected to the support plate <NUM>. The first mounting plate <NUM> and the second mounting plate <NUM> are opposite to each other and are respectively located on an upper part and a lower part of the support plate <NUM>. The first abutting member <NUM> and the second auxiliary support member <NUM> are fixed to the first mounting plate <NUM>, and the second abutting member <NUM> and the third auxiliary support member <NUM> are fixed to the second mounting plate <NUM>.

Exemplarily, the second auxiliary support member <NUM> may include two second rolling bearings. The two second rolling bearings are spaced apart along the X direction. The second rolling bearings are connected to the first mounting plate <NUM> through a second eccentric shaft, and the second eccentric shaft is perpendicular to the first mounting plate <NUM> along the Z direction. In this case, the third distance d3 can be adjusted by screwing the second eccentric shaft. Thus, the third distance d3 can be flexibly adjusted according to the actual working conditions. The number of the second rolling bearings is not limited to two, and may also be three or more. In the case where the number of the second rolling bearings is two, when the X-ray tube assembly <NUM> receives a downward force that makes the column <NUM> tilt forward, the two second rolling bearings abut against the cylinder <NUM> at the same time, so that the contact reference of the second rolling bearings with the cylinder <NUM> is line contact. Of course, the second rolling bearings may also be replaced with other types of bearing structures or blocky structures as long as they are capable of abutting against the cylinder <NUM>.

The third auxiliary support member <NUM> may include two third rolling bearings. The two third rolling bearings are spaced apart along the X direction. The third rolling bearings are connected to the second mounting plate <NUM> through a third eccentric shaft. The third eccentric shaft is perpendicular to the second mounting plate <NUM> along the Z direction. Thus, the fourth distance d4 can be adjusted by screwing the third eccentric shaft, so that the fourth distance d4 can be flexibly designed to adapt to the actual working conditions. The number of the third rolling bearings is not limited to two, and may also be three or more. In the case where the number of the third rolling bearings is two, when the X-ray tube assembly <NUM> receives a downward force that makes the column <NUM> tilt forward, the two third rolling bearings abut against the bend edge <NUM> at the same time, so that the contact reference of the third rolling bearings with the bend edge <NUM> is line contact. Of course, the third rolling bearings may also be replaced with other types of bearing structures or blocky structures as long as they are capable of abutting against the bend edge <NUM>.

It should be noted that in the implementation where the cylinder <NUM> is located below the rail seat body <NUM>, the first abutting member <NUM> is located on the front side of the bend edge <NUM> and abuts against the bend edge <NUM>, and the second abutting member <NUM> is located on the rear side of the cylinder <NUM> and abuts against the cylinder <NUM>. In this case, the second auxiliary support member <NUM> of the medical imaging device <NUM> is designed to be located on the front side of the cylinder <NUM> and have a spacing from the cylinder <NUM> along the Y direction, and the third auxiliary support member <NUM> is designed to be located on the rear side of the bend edge <NUM> and have a spacing from the bend edge <NUM> along the Y direction. The spacings are configured such that when the X-ray tube assembly <NUM> in the working position receives a downward acting force and the column <NUM> has a tendency to overturn forward, the second auxiliary support member <NUM> is capable of abutting against the cylinder <NUM> and the third auxiliary support member <NUM> is capable of abutting against the bend edge <NUM>, thereby improving the stability of the column <NUM>.

The first abutting member <NUM> and the second abutting member <NUM> may be rolling bearings or blocky structures as long as they are capable of abutting against the sliding seat <NUM>. In a preferred example, the first abutting member <NUM> and the second abutting member <NUM> are both rolling bearings, and arc surfaces of the rolling bearings abut against the sliding seat <NUM>. In this way, on the premise of ensuring that the first abutting member <NUM> and the second abutting member <NUM> can withstand the support of the sliding seat <NUM> and have a limiting function, the small friction coefficient of the rolling bearings helps in alleviating the effect of the friction between the first abutting member <NUM> and second abutting member <NUM> and the sliding seat <NUM> on the sliding of the bracket <NUM>.

<FIG> is a partial schematic diagram I of the bracket <NUM> shown in <FIG>. As shown in <FIG>, the support plate <NUM> may be provided with a first through hole. The second abutting member <NUM> is mounted in the first through hole, and a part of the second abutting member <NUM> protrudes out of the support plate <NUM> through the first through hole so as to abut against the cylinder <NUM> or the bend edge <NUM>. In this way, on the premise that the second abutting member <NUM> has a high structural strength to withstand the large supporting force provided by the sliding seat <NUM>, the distance between the support plate <NUM> and the slideway <NUM> in the Y direction can be reduced, and the bracket <NUM> has high stability.

<FIG> is a partial schematic diagram II of the bracket <NUM> shown in <FIG>. In some embodiments of the disclosure, as shown in <FIG>, the medical imaging device <NUM> further includes a fourth auxiliary support member <NUM>. The fourth auxiliary support member <NUM> is provided with two deep groove ball bearings <NUM>. The two deep groove ball bearings <NUM> are connected to the support plate <NUM> and spaced part along the X direction. Arc surfaces of the two deep groove ball bearings <NUM> both contact the bend edge <NUM>. In this way, the sliding seat <NUM> also provides a support for the fourth auxiliary support member <NUM>, so that more positions on the bracket <NUM> abut against the sliding seat <NUM>, which can improve the force applied on the moving component <NUM>. Thus, the friction between the moving component <NUM> and the slideway <NUM> is reduced, which helps in reducing noise generated when the moving component <NUM> moves along the slideway <NUM>. The deep groove ball bearings <NUM> have a small friction coefficient, which helps in reducing noise generated by the friction between the deep groove ball bearings <NUM> and the bend edge <NUM>. Of course, the deep groove ball bearings <NUM> may also be replaced with rolling bearings or other structures, which is not limited in this embodiment. The number of the deep groove ball bearings <NUM> is two, so that the contact reference of the two deep groove ball bearings <NUM> with the bend edge <NUM> is line contact, thereby ensuring both of the deep groove ball bearings to be in good contact with the bend edge <NUM>. Of course, in some embodiments, the number of the deep groove ball bearings <NUM> may also be one, three, four or more, which is not limited in this embodiment.

Specifically, the support plate <NUM> may be provided with a second through hole. The fourth auxiliary support member <NUM> is further provided with a fixed plate <NUM>. The fixed plate <NUM> is mounted in the second through hole. The two deep groove ball bearings <NUM> are respectively connected to two ends of the fixed plate <NUM> along the X direction. In this way, a part of the deep groove ball bearing <NUM> protrudes out of the support plate <NUM> through the second through hole so as to abut against the bend edge <NUM>.

In other embodiments of the disclosure, the fourth auxiliary support member <NUM> is provided with two deep groove ball bearings <NUM>. The two deep groove ball bearings <NUM> may be connected to the first mounting plate <NUM>, and arc surfaces of the two deep groove ball bearing <NUM> both abut against the cylinder <NUM>. Thus, more positions on the bracket <NUM> abut against the sliding seat <NUM>, which can also improve the force applied on the moving component <NUM>, which helps in reducing noise generated when the moving component <NUM> moves along the slideway <NUM>.

On the basis of the above embodiments, the sliding seat <NUM> may include a supporting table <NUM>. The supporting table <NUM> is fixedly arranged on the bed <NUM>, and the rail seat body <NUM> and the cylinder <NUM> may both be fastened and connected to the supporting table <NUM>. By providing the supporting table <NUM>, the supporting table <NUM> provides a support for the rail seat body <NUM>, the cylinder <NUM>, the bracket <NUM> and the column <NUM>. The rail seat body <NUM> and the cylinder <NUM> are connected to the supporting table <NUM> by, but not limited to, soldering, a snap fit joint or a screw joint. As shown in <FIG>, the rail seat body <NUM> may be connected to a bottom surface of the supporting table <NUM>, and the cylinder <NUM> is connected to a top surface of the supporting table <NUM>. Alternatively, in other embodiments, the rail seat body <NUM> may be connected to the top surface of the supporting table <NUM>, and the cylinder <NUM> is connected to the bottom surface of the supporting table <NUM>.

Schematically, as shown in <FIG>, the medical imaging device <NUM> may further include a housing <NUM>. The housing <NUM> is fixedly connected to the bed <NUM>. A rear side of the housing <NUM> has an opening. The supporting table <NUM> is located in the opening and fixedly connected to the housing <NUM>. Thus, the housing <NUM> covers the sliding seat <NUM>, so that the medical imaging device <NUM> has a good overall visual effect.

Claim 1:
A medical imaging device (<NUM>), wherein the medical imaging device (<NUM>) comprises:
a sliding seat (<NUM>), fixedly arranged on a bed (<NUM>) of the medical imaging device (<NUM>), the sliding seat (<NUM>) having a slideway (<NUM>) extending along a length direction (X) of the bed (<NUM>);
a bracket (<NUM>), provided with a moving component (<NUM>) and a restraining member (<NUM>), the moving component (<NUM>) moving along the slideway (<NUM>), and the restraining member (<NUM>) being fitted with the sliding seat (<NUM>) to limit a displacement of the bracket (<NUM>) in a width direction (Y) of the bed (<NUM>);
a column (<NUM>), vertically arranged on the bracket (<NUM>); and
an X-ray tube assembly (<NUM>), arranged on the column (<NUM>), wherein
the sliding seat (<NUM>) comprises a rail seat body (<NUM>), the rail seat body (<NUM>) being provided with a bottom edge (<NUM>), a connecting edge (<NUM>), a top edge (<NUM>) and a bend edge (<NUM>) that are connected sequentially, the bottom edge (<NUM>) and the top edge (<NUM>) being arranged opposite to each other, the connecting edge (<NUM>) and the bend edge (<NUM>) being opposite to each other and both perpendicular to the bottom edge (<NUM>), the bottom edge (<NUM>), the connecting edge (<NUM>), the top edge (<NUM>) and the bend edge (<NUM>) together forming the slideway (<NUM>), and the moving component (<NUM>) being located in the slideway (<NUM>) and contacts the bottom edge (<NUM>), characterized in that
the medical imaging device (<NUM>) further comprises a first auxiliary support member (<NUM>), wherein the first auxiliary support member (<NUM>) is located in the slideway (<NUM>); along a height direction (Z) of the bed (<NUM>), a distance between the first auxiliary support member (<NUM>) and a bottom surface of the slideway (<NUM>) is a first distance, and a distance between the first auxiliary support member (<NUM>) and a top surface of the slideway (<NUM>) is a second distance; and the second distance is configured such that when the X-ray tube assembly (<NUM>) rotates around a central axis of the column (<NUM>) to make the column (<NUM>) have a tendency to overturn, the first auxiliary support member (<NUM>) abuts against the top edge (<NUM>).