Brush assembly and CT device

Abstract

The invention provides an electric brush assembly and a CT device. The electric brush assembly is simple in structure and good in abrasion powder collecting effect. The brush assembly is used for a CT device having a slip ring and a stand fixing part, and is characterized by comprising: a brush holder having an arc-shaped plate shape with an opening formed therein, the brush holder being provided on the stand fixing part; a brush which is attached to the brush holder and contacts the slip ring to transmit electric power or signals; and the abrasion powder collecting mechanism is mounted on the electric brush holder in a manner of forming a roughly sealed space with the electric brush and the electric brush holder.

Description

Technical Field

[0001] The present disclosure relates to a brush assembly in a CT device that utilizes slip rings and brushes for signal and power transmission, and the CT device. Background Art

[0002] At present, there are many structural systems in medical devices that need to transmit power and signals while rotating. In such systems, slip rings and brushes are indispensable. Slip rings and brushes are components that can be used in electromechanical systems that require continuous rotation and require power and signals to be transmitted from a fixed position to a rotating position. When using slip rings and brushes to transmit power and signals, the brush head rubs against the slip ring, which will produce abrasive powder.

[0003] Wear powder may cause disadvantages. For example, if the wear powder is scattered to the substrate inside the gantry, it may easily cause a short circuit or affect the imaging quality. On the other hand, if the wear powder is scattered to the outside of the gantry, it may easily cause the patient's wound to be infected or make the gantry dirty, affecting the appearance.

[0004] Therefore, for systems with slip rings and brushes, the prior art has studied various methods for collecting wear powder of the brushes.

[0005] For example, in an existing system with slip rings and brushes, a collection tank is provided under the slip ring housing, and a maintenance window is provided on the collection tank. In this way, the wear powder generated by the slip ring and the brush during operation will freely fall into the collection tank provided under the slip ring housing, and the operator can clean it regularly through the maintenance window.

[0006] However, in such a system with slip rings and brushes, the wear powder is simply dropped to the collection box at the bottom of the slip ring by the rotating gravity of the frame for collection and maintenance. Although the wear powder can be collected, the wear powder will be scattered at the source due to its dispersibility, so this collection method has poor collection effect. Therefore, a technology that can simply and effectively collect wear powder is needed. Summary of the invention

[0007] In order to solve the technical problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a brush assembly and a CT device, which can collect wear powder closer to the source of wear powder, reduce the scattering of wear powder, improve the collection effect of wear powder, and increase the collection rate of wear powder. Furthermore, it can reduce the risk of wear powder causing infection of patient wounds, make the gantry more beautiful, improve the hospital environment, improve the doctor's operating environment, improve the air quality of the operating room, etc., reduce the risk of short circuit of the substrate, stabilize the image quality taken by the CT device, and improve the performance of the CT device.

[0008] A brush assembly according to an embodiment of the present invention is used in a CT device having a slip ring and a gantry fixing portion, and is characterized in that it comprises: a brush holder, which is an arc-shaped plate with an opening and is arranged on the gantry fixing portion; a brush, which is installed on the brush holder and contacts the slip ring to transmit power or signals; and a wear powder collecting mechanism, which is installed on the brush holder in a manner to form a substantially sealed space with the brush and the brush holder.

[0009] In addition, the brush assembly provided by the present invention is characterized in that the wear powder collection mechanism includes: a dust collecting mechanism, which is installed on the radial outer side of the brush holder on the surface of the brush holder on the side where the brush is installed, and is near the contact part between the brush and the slip ring; an air duct baffle, which is installed on the opening part of the brush holder and the two end parts along the circumferential direction; a sealing plate, which is installed on the surface of the brush holder on the opposite side of the side where the brush is installed, at a radial outer part of the brush holder in a manner close to the slip ring from the radial outer side; and a wear powder baffle, which is installed on the radial inner part of the brush holder in a manner opposite to the sealing plate with the air duct baffle in between.

[0010] In addition, the brush assembly provided by the present invention is characterized in that the dust collecting mechanism includes: a box body, one surface of the box body is installed on the brush holder, a chamber is formed inside the box body and is open to the surface side opposite to the surface of the box body installed on the brush holder, a powder inlet for sucking wear powder is formed on the radially inner surface when the box body is installed on the brush holder, and an opening is formed on the radially outer surface when the box body is installed on the brush holder; adsorption cotton is installed in the chamber of the box body in a detachable manner; and an air suction mechanism is installed on the box body in a manner connected to the opening.

[0011] In addition, the brush assembly provided by the present invention is characterized in that the air duct baffle is formed in an L-shaped cross-section, and radially extends from a portion radially inner than a portion radially inner than a portion radially outer than a portion radially outer than a portion radially outer than a portion radially outer than a portion of the contact between the brush and the slip ring, and the radially outer end of the air duct baffle is close to the circumferentially outer end of the powder inlet, and the air duct baffle extends from the surface of the brush holder along a direction perpendicular to the plate surface of the brush holder toward the direction in which the brush is installed to the root of the brush column of the brush.

[0012] In addition, the brush assembly provided by the present invention is characterized in that the plate surface of the sealing plate extends along an arc with the same arc as that of the brush holder, the arc length of the sealing plate is greater than the arc length of the brush holder, and the sealing plate is installed at a position radially outside the opening of the brush holder.

[0013] In addition, the brush assembly provided by the present invention is characterized in that the radial cross-section of the sealing plate is an inverted L-shape, fins are formed on the sealing plate toward the inner side of the arc, and a cutout portion is formed on the sealing plate for accommodating the dust collecting mechanism.

[0014] In addition, the brush assembly provided by the present invention is characterized in that the plate surface of the wear powder baffle extends along an arc with the same arc as the brush holder, the arc length of the wear powder baffle is equal to the arc length of the brush holder at the same radius, and the wear powder baffle is installed at a position radially inner than the opening of the brush holder.

[0015] In addition, the brush assembly provided by the present invention is characterized in that the radial cross-section of the wear powder baffle is an inverted L-shape, and fins are formed on the wear powder baffle toward the outer side of the arc.

[0016] In addition, the brush assembly provided by the present invention is characterized in that the wear powder baffle is arranged close to the slip ring in a direction perpendicular to the plate surface of the brush holder, and the distance between the wear powder baffle and the slip ring in a direction perpendicular to the surface of the brush holder is more than 5 mm.

[0017] In addition, the brush assembly provided by the present invention is characterized in that the air suction mechanism is an axial flow fan, a centrifugal fan or a bladeless fan.

[0018] In addition, the brush assembly provided by the present invention is characterized in that the brush assembly further comprises: a noise-proof mechanism, which surrounds the air suction mechanism and is disposed in the box body in a manner that the air outlet is exposed.

[0019] In addition, the brush assembly provided by the present invention is characterized in that the noise prevention mechanism is formed as a hexahedron in which two adjacent faces are open.

[0020] In addition, the brush assembly provided by the present invention is characterized in that the brush assembly also has: an abrasion powder blocking cover extending from the partition between the box body and the fan toward the direction of the air outlet of the suction mechanism to cover the air outlet of the suction mechanism.

[0021] In addition, the CT device provided by the present invention comprises: a gantry fixing portion; a slip ring; and the brush assembly described in any one of the above items.

[0022] In addition, the CT apparatus provided by the present invention is characterized by comprising a slip ring sealing mechanism provided along the slip ring except for a portion of the slip ring overlapping with the brush assembly, and surrounding the slip ring in a manner that substantially seals the slip ring.

[0023] In addition, the CT device provided by the present invention is characterized in that the slip ring sealing mechanism includes: a slip ring shell, which is installed on the platform fixing part in a manner of surrounding the radial outer side of the slip ring and the opposite side of the slip ring to the platform fixing part; and a slip ring shell sealing plate, which is installed on the slip ring shell in a manner of covering the radial inner side of the slip ring.

[0024] In addition, the CT device provided by the present invention is characterized in that the slip ring sealing mechanism includes: a sealed fixing plate installed on the stand fixing part between the slip ring and the stand fixing part; a slip ring shell installed on the sealed fixing plate in a manner of surrounding the radial outer side of the slip ring and the opposite side of the slip ring opposite to the side of the stand fixing part; and a slip ring shell sealing plate installed on the slip ring shell in a manner of covering the radial inner side of the slip ring.

[0025] In addition, the CT apparatus provided by the present invention is characterized in that the sealed fixing plate is mounted on the gantry fixing portion in a manner such that at least a portion of the sealed fixing plate is spaced apart from the gantry fixing portion.

[0026] In addition, the CT device provided by the present invention is characterized in that a sealing gasket is sandwiched between the at least one portion of the sealed fixing plate and the gantry fixing portion, and between the at least another portion of the sealed fixing plate and the slip ring housing.

[0027] In addition, the CT apparatus provided by the present invention is characterized in that the sealing gasket is made of an elastically deformable material, and the sealing gasket is sandwiched in a manner to be compressed and elastically deformed.

[0028] In addition, the CT device provided by the present invention is characterized in that, when observed in a cross section perpendicular to the circumferential direction, the slip ring housing is in an inverted L shape.

[0029] In addition, the CT device provided by the present invention is characterized in that, when observed in a cross section perpendicular to the circumferential direction, the slip ring housing sealing plate and the slip ring housing are integrally formed into a U-shape.

[0030] In addition, the CT apparatus provided by the present invention is characterized in that a distance between the slip ring housing sealing plate and a radially inner edge of a surface of the slip ring on a side opposite to the gantry fixing portion is greater than 5 mm.

[0031] In addition, the CT apparatus provided by the present invention is characterized in that the interval between the at least a portion of the sealed fixing plate and the gantry fixing portion is greater than 5 mm.

[0032] Effects of the Invention

[0033] By using the brush assembly and CT device of the embodiment of the present invention, the wear powder can be collected closer to the source of the wear powder, the scattering of the wear powder is reduced, the collection effect of the wear powder is improved, and the collection rate of the wear powder is increased. Furthermore, the risk of the patient's wound infection caused by the wear powder can be reduced, the gantry can be made more beautiful, the hospital's medical environment can be improved, the doctor's operating environment can be improved, the air quality of the operating room can be improved, the risk of short circuit of the substrate can be reduced, the image quality taken by the CT device can be stabilized, and the performance of the CT device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram showing the structure of a brush assembly and a CT device according to the first embodiment of the present invention.

[0035] Figure 2A It is a schematic perspective view of a slip ring and a brush assembly for explaining the first embodiment of the present invention.

[0036] Figure 2B The brush assembly of the first embodiment of the present invention is used to explain the brush assembly of the first embodiment of the present invention, and the viewing angle is different from Figure 2A An enlarged exploded perspective view of .

[0037] Figure 3A It is a perspective view for explaining the brush assembly according to the first embodiment of the present invention.

[0038] Figure 3B It is an exploded perspective view of the brush assembly for explaining the first embodiment of the present invention.

[0039] Figure 3C The brush assembly of the first embodiment of the present invention is used to explain the brush assembly of the first embodiment of the present invention, and the viewing angle is different from Figure 3B Exploded three-dimensional diagram.

[0040] Figure 4A It is an exploded perspective view for explaining the dust collecting mechanism of the brush assembly according to the first embodiment of the present invention.

[0041] Figure 4B The dust collecting mechanism of the brush assembly of the first embodiment of the present invention is described with a different viewing angle from that of the brush assembly. Figure 4A Exploded three-dimensional diagram.

[0042] Figure 5 It is a perspective view for explaining a dust collecting mechanism of a brush assembly according to a second embodiment of the present invention.

[0043] Fig. 6A It is an exploded perspective view for explaining a dust collecting mechanism of a brush assembly according to a second embodiment of the present invention.

[0044] Figure 6BThe dust collecting mechanism of the brush assembly of the second embodiment of the present invention is described with a different viewing angle from that of the brush assembly. Fig. 6A Exploded three-dimensional diagram.

[0045] Figure 7 It is a schematic diagram for explaining a slide ring seal mechanism of a CT apparatus according to a third embodiment of the present invention.

[0046] Fig. 8A This is a perspective view showing a slide ring seal mechanism of a CT apparatus according to a third embodiment of the present invention, taken along a cross section perpendicular to the circumferential direction.

[0047] Figure 8B It is a cross-sectional view taken along a cross section perpendicular to the circumferential direction for explaining a slide ring seal mechanism of a CT apparatus according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0048] Hereinafter, a brush assembly and a CT apparatus according to embodiments of the present invention will be described with reference to the drawings.

[0049] In addition, in this specification and drawings, only components related to the technical idea of ​​the present invention are described and shown, and other components are omitted.

[0050] In addition, in this specification and the drawings, the same reference numerals are attached to components having the same or similar functions, and duplicate descriptions are appropriately omitted.

[0051] In addition, in this specification and the drawings, the diameter direction of the circular slip ring 103 is set as the radial direction, the side of the slip ring 103 closer to the center of the circle is set as the radial inner side, the side of the slip ring 103 away from the center of the circle is set as the radial outer side, and the direction drawn by the circumference of the slip ring 103 is set as the circumferential direction.

[0052] In addition, the drawings are shown for the convenience of explanation, and the conditions shown in the drawings are not necessarily the conditions in actual use. Moreover, for the convenience of display, the display scales of the components in the drawings are not exactly the same. In addition, the drawings are not displayed in complete correspondence, and sometimes some components are omitted for convenience.

[0053] (First Embodiment)

[0054] Reference Figure 1 to Figure 4B , a brush assembly according to a first embodiment will be described.

[0055] Figure 1 It is a schematic diagram of the structure of the brush assembly and the CT device of the present invention.

[0056] like Figure 1As shown in FIG. 1 , the CT apparatus of the present invention includes a rotating portion 101 , a fixed portion (gantry fixed portion) 102 , a slip ring 103 , and a brush assembly 104 provided on the fixed portion 102 .

[0057] The rotating unit 101 is used to carry an X-ray tube and a detector for receiving X-rays and rotate. The rotating unit 101 is controlled by a control unit (not shown) to periodically rotate in several fixed modes. In each mode, the rotating unit 101 rotates at a constant speed.

[0058] The fixing portion 102 is used to support the rotating portion 101 and to install the brush assembly 104 .

[0059] The slip ring 103 is disposed on the rotating part 101 and is made of a conductive material. The slip ring 103 cooperates with the brush assembly 104 to transmit power and signals between the rotating part 101 and the fixed part 102 .

[0060] The brush assembly 104 is disposed on the fixed part 102 and is made of a conductive material. When the CT device is working, the brush assembly 104 contacts the slip ring 103, and power and signal transmission are performed between the rotating part 101 and the fixed part 102 while the slip ring 103 rotates.

[0061] Next, combine Figure 2A to Figure 4B , the brush assembly of the present invention is described. Figure 2A It is a schematic perspective view of a slip ring and a brush assembly for explaining the first embodiment of the present invention. Figure 2B The brush assembly of the first embodiment of the present invention is used to explain the brush assembly of the first embodiment of the present invention, and the viewing angle is different from Figure 2A An enlarged exploded perspective view of . Figure 3A It is a perspective view for explaining the brush assembly according to the first embodiment of the present invention. Figure 3B It is an exploded perspective view of the brush assembly for explaining the first embodiment of the present invention. Figure 3C The brush assembly of the first embodiment of the present invention is used to explain the brush assembly of the first embodiment of the present invention, and the viewing angle is different from Figure 3B Exploded three-dimensional diagram. Figure 4A It is an exploded perspective view for explaining the dust collecting mechanism of the brush assembly according to the first embodiment of the present invention. Figure 4B The dust collecting mechanism of the brush assembly of the first embodiment of the present invention is described with a different viewing angle from that of the brush assembly. Figure 4A Exploded three-dimensional diagram.

[0062] For easy observation, Figure 2A and Figure 2B Only the slip ring 103 and the brush assembly 104 are shown. Figure 3A to Figure 3C Only the brush assembly 104 is shown, and illustration of other components is omitted.

[0063] The brush assembly 104 is used in a CT device having a slip ring 103 and a gantry fixing portion (not shown). The brush assembly 104 includes: a brush 10 mounted on a brush holder 20 described later, which contacts the slip ring 103 to transmit power or signals; the brush holder 20 is an arc-shaped plate having an opening L, which is disposed on the gantry fixing portion (not shown); and a wear powder collecting mechanism, which is mounted on the brush holder 20 in a manner that forms a substantially sealed space with the brush 10 and the brush holder 20.

[0064] Here, the brush 10 is connected to the Figure 3B The upper side of the paper in FIG. 1 is mounted on the opening L of the brush holder 20 and Figure 3B The lower side of the paper in the figure is exposed from the opening L so as to be able to be in contact with the brush holder 20. Figure 3B The brush 10 contacts the slip ring 103 rotating at the lower side of the paper. The brush 10 contacts the slip ring 103 and rubs with the rotation of the slip ring 103, and the wear powder generated thereby flows from the contact portion between the brush 10 and the slip ring 103 and the air movement generated by the rotation of the slip ring 103 to form a wear powder flow. In addition, there is also wear powder that does not form a wear powder flow and flies to various places in various directions from the contact portion between the brush 10 and the slip ring 103.

[0065] In addition, if Figure 3A to Figure 3C As shown, the brush holder 20 is formed with an opening L for mounting the brush 10 and a cutout K for mounting the dust collecting mechanism 30 described later.

[0066] like Figure 2A to Figure 3C As shown, the wear powder collecting mechanism may include, for example: a dust collecting mechanism 30 , an air duct baffle 40 , a sealing plate 50 and a wear powder baffle 60 .

[0067] The dust collecting mechanism 30 is also called a dust box, and is mounted on the surface of the brush holder 20 on the side where the brush 10 is mounted, radially outward of the brush holder 20. The dust collecting mechanism 30 is accommodated in the cutout portion K of the brush holder 20. In addition, the dust collecting mechanism 30 is preferably arranged near the contact portion between the brush 10 and the slip ring 103, that is, near the wear powder generation source. In this way, the wear powder generated at the contact portion between the brush 10 and the slip ring 103 due to the friction between the brush 10 and the slip ring 103 can be collected in the dust collecting mechanism 30 arranged near the wear powder generation source. In addition, the number of dust collecting mechanisms 30 is preferably the same as the number of openings L provided on the brush holder 20, and the dust collecting mechanism 30 and the openings L provided on the brush holder 20 are provided corresponding to each other.

[0068] like Figure 4A and Figure 4B As shown, the dust collecting mechanism 30 includes a box body 301 , adsorbent cotton 302 , and an air suction mechanism 303 .

[0069] like Figure 4BAs shown, the case 301 is attached to the brush holder 20. In addition, a cavity is formed inside the case 301, which is open to the surface 301b side of the case 301 that is opposite to the surface 301a.

[0070] In addition, if Figure 4B As shown, a powder inlet 304 for sucking wear powder is formed on the radially inner surface of the case 301 when the case 301 is mounted on the brush holder 20. In addition, a guide portion 304a is formed around the inlet powder 304.

[0071] In addition, if Figure 4A As shown, an opening a1 is formed on a surface 301 d of the case 301 that is located radially outward when the case 301 is attached to the brush holder 20 .

[0072] The adsorption cotton 302 is detachably mounted in the chamber of the box body 301. The adsorption cotton 302 is made of a porous, air-permeable material such as a sponge, and is used to adsorb the wear powder collected by the dust collecting mechanism 30, and reliably adsorb the collected wear powder to prevent it from scattering.

[0073] The air suction mechanism 303 is installed on the box body 301 in a manner that it communicates with the opening a1 formed on the surface 301d of the box body 301. The air suction mechanism 303 can be installed on the box body 301 by, for example, a screw hole H formed on the air suction mechanism 303, a screw hole H formed on the surface 301d of the box body 301, and a screw D as a fixing member. In addition, the air suction mechanism 303 can be an axial flow fan, a centrifugal fan, or a bladeless fan, as long as it can suck air from the box body 301 to generate negative pressure to attract wear powder, or it can be other components.

[0074] In addition, the dust collecting mechanism 30 may include a plurality of plate members c1 to c4, each of which is formed to be substantially the same size as the corresponding surface of the box body 301. In addition, the plate members c1 to c4 are provided with screw holes H corresponding to the screw holes H provided on the corresponding surface of the box body 301.

[0075] The plate members c1 and c4 are made of elastically deformable materials such as rubber, and are used to seal and prevent the wear powder from flying out. In addition, the dust collecting mechanism 30 is shown to include the plate members c1 and c4, but the plate members c1 and c4 are not necessary and can be omitted according to actual conditions.

[0076] In addition, the plate member c2 is made of a metal material and is used to support and fix the adsorbent cotton 302. Specifically, the plate member c2 is formed to be the same size as the surface 301b of the box body 301, and screw holes H are provided on the plate member c2 in a one-to-one correspondence with the screw holes H provided on the surface 301b of the box body 301. Thus, after the adsorbent cotton 302 is placed in the chamber of the box body 301, the plate member c2 is screwed to the surface 301b of the box body 301 by screws, so that the adsorbent cotton 302 is reliably installed in the chamber of the box body 301. In addition, when the adsorbent cotton 302 needs to be cleaned or maintained, the screws that screw the plate member c2 to the surface 301b of the box body 301 are unscrewed, and the adsorbent cotton 302 placed in the chamber of the box body 301 can be taken out and cleaned.

[0077] In addition, when the plate member c1 is provided, the plate member c1 is provided with screw holes H in a one-to-one correspondence with the holes provided on the surface 301b of the box body 301, similarly to the plate member c2. In this case, after the adsorbent cotton 302 is placed in the chamber of the box body 301, the plate members c1 and c2 are screwed together to the surface 301b of the box body 301 by screws, so that the adsorbent cotton 302 is reliably installed in the chamber of the box body 301 in a sealed manner.

[0078] In addition, the plate member c3 is made of a metal material and is used to support and fix the air suction mechanism 303. Specifically, the plate member c3 is formed to be the same size as the surface 301d of the box body 301, and a screw hole H and an opening a are provided on the plate member c3 in a one-to-one correspondence with the screw hole H and the opening a1 provided on the surface 301d of the box body 301. Thus, in a state where the air inlet of the air suction mechanism 303 is connected to the opening a1 provided on the surface 301d of the box body 301, the plate member c3 is screwed to the surface 301d of the box body 301 by a screw, so that the air suction mechanism 303 is reliably mounted on the surface 301d of the box body 301.

[0079] In addition, when the plate member c4 is provided, the plate member c4 is provided with a hole (which may be a screw hole) H and an opening a in a one-to-one correspondence with the screw hole H provided on the surface 301d of the box body 301, similarly to the plate member c3. In this case, the plate members c3 and c4 are screwed together to the surface 301d of the box body 301 by screws, while the air inlet of the air suction mechanism 303 is connected to the opening a1 provided on the surface 301d of the box body 301 and the opening provided on the plate member c4, so that the air suction mechanism 303 is reliably mounted on the surface 301d of the box body 301 in a sealed manner.

[0080] In addition, the plate member c3 may be provided with fixing members on both sides in the length direction, and the fixing members may be provided with holes H3 and / or notches Q3 corresponding to the holes (e.g. H2) or claws Q2 provided on the box body 301. Thus, the plate member c3 can be reliably fixed to the box body 301 by screwing or engaging with screws.

[0081] In addition, if Figure 4A as well as Figure 4B As shown, a screw hole H31 is formed near the powder inlet 304 on the box body 301. Figure 3B The screw holes H31 on the box body 301 and the screw holes between the opening L and the cutout K on the brush holder 20 are sequentially penetrated from the upper side of the paper (refer to Figure 3B and Figure 3C ), and screw from e.g. Figure 3B The screw holes H1 on the box body 301 are sequentially penetrated from the upper side of the paper (refer to Figure 4B ) and the mounting portion 20a (or mounting portion 20c) of the brush holder 20 (refer to Figure 3B and Figure 3C ), and screw from e.g. Figure 3B The screw holes H1 on the box body 301 are sequentially penetrated from the upper side of the paper (refer to Figure 2B ) and the mounting portion 20b (or mounting portion 20d) of the brush holder 20, thereby enabling the dust collecting mechanism 30 to be mounted on the brush holder 20.

[0082] In addition, regarding the air duct baffle 40, as shown in FIG. Figure 3A As shown, it is installed in the opening L on the brush holder 20. And, the air duct baffle 40 is installed at the positions of the two ends of the opening L in the circumferential direction. In addition, the air duct baffle 40 is provided corresponding to the opening L provided on the brush holder 20. In the case where one air duct baffle 40 corresponds to one opening L, the air duct baffle 40 is preferably installed on the downstream side where the abrasive powder flow flows, but it is not limited to this, and of course it can also be installed on the upstream side where the abrasive powder flow flows. In addition, in the case where two air duct baffles 40 correspond to one opening L, it is preferred that the two air duct baffles 40 are respectively installed at the positions of the two ends of one opening L in the circumferential direction, that is, the air duct baffle 40 is installed on both the upstream side and the downstream side where the abrasive powder flow flows.

[0083] In addition, if Figure 2B As shown in FIGS. 1 and 2 , the air duct baffle 40 is formed in an L-shaped cross section. Specifically, the air duct baffle 40 can be formed by bending a strip metal plate by approximately 90 degrees and then punching it.

[0084] In addition, if Figure 2BAs shown in the figures, the air duct baffle 40 includes a base 40a and a vertical portion 40b. A screw hole (not shown) for mounting the air duct baffle 40 on the brush holder 20 is provided in the base 40a. The vertical height of the vertical portion 40b from the base 40a is less than the thickness of the brush holder 20. The vertical height of the vertical portion 40b from the base 40a is set to be less than the thickness of the brush holder 20, so that the air duct baffle 40 extends from the surface of the brush holder 20 in a direction perpendicular to the plate surface of the brush holder 20 toward the direction of mounting the brush 10 to the root of the brush column of the brush 10.

[0085] In addition, if Figure 3A As shown, the air duct baffle 40 preferably extends radially from a position radially inward than the radial inner side of the contact portion between the brush 10 and the slip ring 103 to a position radially outward than the radial outer side of the contact portion between the brush 10 and the slip ring 103. In addition, it is preferred that the radial outer end of the air duct baffle 40 is close to the circumferential outer end of the powder inlet 304 of the dust collecting mechanism 30 described later. Thus, when the abrasion powder generated from the abrasion powder generating source forms an abrasion powder flow and flows in the air duct, it flows to the air duct baffle 40 and is guided by the air duct baffle 40 to the powder inlet 304 of the dust collecting mechanism 30. Thus, on the one hand, sealing is achieved by the air duct baffle 40, and on the other hand, the air duct baffle 40 guides the abrasion powder flow. In this way, the abrasion powder can be better guided to prevent the abrasion powder from being dispersed.

[0086] In addition, if Figure 3A As shown, the sealing plate 50 is installed on the radially outer portion of the brush holder 20 on the surface on the opposite side of the brush holder 20 to the side on which the brush 10 is installed, in a manner close to the slip ring 103 from the radially outer side. In addition, it is preferred that the plate surface of the sealing plate 50 extends along an arc with the same arc as the brush holder 20. The arc length of the sealing plate 50 is preferably greater than the arc length of the brush holder 20 at the same diameter. In this way, the sealing plate 50 can be tightly connected to the slip ring housing 2 of other parts described later, thereby forming a good closed space relative to the wear powder. In addition, the sealing plate 50 is preferably installed at a position of the brush holder 20 that is radially outward of the opening L. In addition, the radial cross-section of the sealing plate 50 is preferably roughly an inverted L shape.

[0087] In addition, if Figure 2B As shown, a fin 50f is formed on the sealing plate 50 toward the inner side of the arc, and the fin 50f helps to achieve the sealing of the slip ring 103 and the brush holder 20 to prevent the wear powder from scattering and leaking. In addition, a cutout portion 50k is formed on the sealing plate 50, and the cutout portion 50k is used to accommodate the dust collecting mechanism 30 in the assembled state of the brush assembly.

[0088] In addition, if Figure 3AAs shown, the wear powder baffle 60 is mounted on the radial inner side of the brush holder 20 in a manner opposed to the sealing plate 50 via the air duct baffle 40. In addition, the radial cross section of the wear powder baffle 60 is an inverted L-shape, and fins 60f are formed on the wear powder baffle 60 toward the arc-shaped outer side. The wear powder baffle 60 is fixed to the brush holder 20 by screw holes and screws opened on the fins 60f.

[0089] The plate surface of the wear powder baffle 60 extends along the same arc as the brush holder 20. The arc length of the wear powder baffle 60 is equal to the arc length of the brush holder 20 at the same diameter. In addition, the wear powder baffle 60 is preferably installed radially inward of the opening L of the brush holder 20.

[0090] The wear powder baffle 60 is preferably provided close to the slip ring 103 in a direction perpendicular to the plate surface of the brush holder 20. The wear powder baffle 60 is preferably provided at a distance of 5 mm or more from the slip ring 103 in a direction perpendicular to the surface of the brush holder 20.

[0091] Thus, the brush assembly of this embodiment includes the brush 10, the brush holder 20 and the wear powder collecting mechanism, and the wear powder collecting mechanism forms a substantially sealed space with the brush 10 and the brush holder 20. This can effectively prevent the wear powder from scattering and shorten the wear powder collecting process.

[0092] In addition, the wear powder collecting mechanism includes a dust collecting mechanism 30, an air duct baffle 40, a sealing plate 50, and a wear powder baffle 60, so that when the brush assembly 104 cooperates with the slip ring 103, the brush 10, the brush holder 20, the dust collecting mechanism 30, the air duct baffle 40, the sealing plate 50, the wear powder baffle 60, and the slip ring 103 jointly form a substantially sealed first space that can guide the flow of wear powder. In this way, the wear powder can be effectively prevented from scattering, and the wear powder collection stroke can be shortened.

[0093] In addition, the dust collecting mechanism 30 of the brush assembly is installed near the contact portion between the brush 10 and the slip ring 103, and the powder inlet 304 of the dust collecting mechanism 30 is oriented toward the first space near the contact portion between the brush 10 and the slip ring 103, which is the source of the wear powder. Thus, the dust collecting mechanism 30 is close to the source of the wear powder, and can effectively collect the wear powder before the wear powder is scattered.

[0094] In addition, the dust collecting mechanism 30 of the brush assembly includes detachably mounted adsorbent cotton 302 for adsorbing the wear powder collected by the dust collecting mechanism 30 , thereby reliably adsorbing the collected wear powder to prevent it from scattering.

[0095] In addition, the dust collecting mechanism 30 of the brush assembly has a suction mechanism 303, and the suction of the suction mechanism 303 forms a negative pressure in the dust collecting mechanism 30 and the first space, thereby better guiding and attracting the wear powder, and reliably and efficiently adsorbing the wear powder into the adsorption cotton.

[0096] In addition, the seal plate 50 of the brush assembly includes the fins 50 f , which contribute to the sealing between the slip ring 103 and the brush 20 and prevent the wear powder from scattering and leaking.

[0097] In addition, the arc length of the seal plate 50 of the brush assembly is preferably greater than the arc length of the brush holder 20 where it is installed. Thus, the seal plate 50 can be closely connected with the later described sliding ring housing seal plate, thereby forming a good closed space for the wear powder.

[0098] In addition, the wear powder baffle 60 of the brush assembly is arranged close to the slip ring 103 in a direction perpendicular to the plate surface of the brush holder 20. In addition, the wear powder baffle 60 is preferably at a distance of 5 mm or more from the slip ring 103 in a direction perpendicular to the surface of the brush holder 20. Thus, it is possible to ensure that the wear powder collecting mechanism forms a substantially sealed space with the brush 10 and the brush holder 20, prevent the wear powder from scattering, and shorten the wear powder collection stroke. On the other hand, it is possible to avoid the wear powder baffle 60 from contacting the slip ring 103, thereby preventing the slip ring 103 from being unable to rotate or being damaged.

[0099] In addition, two dust collecting mechanisms 30 are provided in the brush assembly, and the two dust collecting mechanisms 30 are adjacent to each other and close to the source of the wear powder, so that the dust collecting mechanism 30 located on the downstream side of the wear powder flow also plays a role of supplementing the collection of the dust collecting mechanism 30 located on the upstream side, so that the wear powder not collected by the dust collecting mechanism 30 on the upstream side is supplemented by the dust collecting mechanism 30 on the downstream side. As a result, the wear powder collection rate and collection efficiency are improved.

[0100] (Second Embodiment)

[0101] Below, refer to Figure 5 to Figure 6B A brush assembly according to a second embodiment of the present invention will be described. Figure 5 It is a perspective view for explaining a dust collecting mechanism of a brush assembly according to a second embodiment of the present invention. Fig. 6A It is an exploded perspective view for explaining a dust collecting mechanism of a brush assembly according to a second embodiment of the present invention. Figure 6B The dust collecting mechanism of the brush assembly of the second embodiment of the present invention is described with a different viewing angle from that of the brush assembly. Fig. 6A Exploded three-dimensional diagram.

[0102] In addition, the second embodiment is different from the first embodiment only in the structure related to the suction mechanism 303 of the dust collecting mechanism 30, and the rest is the same as the first embodiment. Therefore, in this embodiment, the description of the same parts as the first embodiment is omitted, and only the structure related to the suction mechanism 303 of the dust collecting mechanism 30 is described.

[0103] like Figure 5 As shown, the dust collecting mechanism 300 of the second embodiment is different from the dust collecting mechanism 30 of the first embodiment in that a plate member c33 is provided to replace the plate member c3 of the dust collecting mechanism 30, and a noise prevention mechanism 400 is also provided.

[0104] The noise prevention mechanism 400 is disposed in the box body 301 so as to surround the air suction mechanism 303 with the air outlet exposed.

[0105] like Fig. 6A as well as Figure 6B As shown, the noise-proofing mechanism 400 is formed as a hexahedron in which two adjacent faces are open. The noise-proofing mechanism 400 is formed, for example, by cutting, bending, and stamping a metal plate. Specifically, the noise-proofing mechanism 400 includes a first side wall 401, a second side wall 402 opposite to the first side wall, a third side wall 403 sandwiched between the first side wall 401 and the second side wall 402, and a bottom wall 404 adjacent to the first side wall 401, the second side wall 402, and the third side wall 403. The noise-proofing mechanism 400 is configured to be able to accommodate the size of the suction mechanism 303. That is, the size of the bottom wall 404 adjacent to the first side wall 401, the second side wall 402, and the third side wall 403 is configured to match the size of the suction mechanism 303.

[0106] The third side wall 403 is provided with a hole for riveting or welding with the second side wall.

[0107] The noise prevention mechanism 400 is fixed to the plate member c33 by welding, bonding, or the like.

[0108] By providing the noise-proofing mechanism 400, the noise generated by the suction mechanism 303 can be shielded and absorbed, thereby reducing the discomfort of patients and operators, creating a good medical environment, and improving the performance of the brush assembly and equipment using the brush assembly.

[0109] In addition, it is preferred that a noise elimination mechanism such as sound-absorbing cotton is attached to the bottom wall 404 of the noise prevention mechanism 400. This can further absorb the noise generated by the air suction mechanism 303, achieving a better noise prevention effect.

[0110] In addition, of course, noise elimination mechanisms such as sound-absorbing cotton can also be set on the inner wall of the noise prevention mechanism 400 to achieve a better noise prevention effect.

[0111] In addition, the noise prevention mechanism 400 surrounds the air suction mechanism 303 in such a manner that the air outlet of the air suction mechanism 303 is exposed. Thus, the air outlet of the air suction mechanism 303 is guaranteed to ensure that the air suction mechanism 303 works normally.

[0112] In addition, the dust collecting mechanism 300 of this embodiment preferably has a plate member c5 sandwiched between the plate member c33 and the air suction mechanism 303. The plate member c5 is made of elastically deformable material such as rubber, and is used to absorb noise, further eliminate noise, and more effectively prevent wear powder from flying out.

[0113] In addition, preferably, the plate component c33 of the dust collecting mechanism 300 of this embodiment is bent and extended from the partition part between the box body 301 and the suction mechanism 303 toward the direction of the air outlet of the suction mechanism 303 to block the air outlet of the suction mechanism 303.

[0114] Specifically, Figure 5 , Fig. 6A As shown, the plate member c33 of the dust collecting mechanism 300 includes a first extension portion 331 , a second extension portion 332 and a third extension portion 333 in addition to a partition portion located between the box body 301 and the suction mechanism 303 in the installed state.

[0115] The first extension portion 331 extends from at least a portion of the partition between the box body 301 and the suction mechanism 303 (a portion overlapping the suction mechanism) to a predetermined height substantially perpendicular to the direction of the suction mechanism 303. The predetermined height is set to be slightly greater than the height of the suction mechanism 303.

[0116] The second extension portion 332 extends from the long side of the first extension portion 331 substantially orthogonally toward the direction approaching the air suction mechanism 303. The second extension portion 332 is substantially parallel to the partition portion between the box body 301 and the air suction mechanism 303.

[0117] The third extension portion 333 extends from one side of the short side of the first extension portion 331 substantially orthogonally toward the direction close to the air suction mechanism 303. The third extension portion 332 is adjacent to the partition portion between the box body 301 and the air suction mechanism 303, substantially parallel to the partition portion between the box body 301 and the air suction mechanism 303, the first extension portion 331, and the second extension portion 332.

[0118] The sizes of the first extension portion 331 , the second extension portion 332 and the third extension portion 333 are configured to match the air suction mechanism 303 .

[0119] The plate component c33 of the dust collecting mechanism 300 can constitute an abrasion powder blocking cover, which has a first extension part 331, a second extension part 332 and a third extension part 333, thereby being able to receive a small amount of abrasion powder flying out from the air outlet of the suction mechanism 303 and more reliably collect the abrasion powder.

[0120] In addition, it is preferable that a wear powder collecting groove is formed inside the second extending portion 333 , thereby being able to more reliably collect the wear powder and prevent the wear powder from being further scattered.

[0121] Thus, according to the brush assembly of the second embodiment, in addition to the effects of the first embodiment, the noise generated by the air suction mechanism 303 can be absorbed by the anti-noise mechanism 400, and the wear powder can be prevented from flying out more effectively. In addition, the wear powder blocking cover is provided, and the first extension portion 331, the second extension portion 332 and the third extension portion 333 are provided, so that a small amount of wear powder flying out from the air outlet of the air suction mechanism 303 can be received, and the wear powder can be collected more reliably.

[0122] (Third Embodiment)

[0123] Below, refer to Figure 7 to Figure 8B A third embodiment of the present invention will be described. Figure 7 It is a schematic diagram for explaining a slide ring seal mechanism of a CT apparatus according to a third embodiment of the present invention. Fig. 8A This is a perspective view showing a slide ring seal mechanism of a CT apparatus according to a third embodiment of the present invention, taken along a cross section perpendicular to the circumferential direction. Figure 8B It is a cross-sectional view taken along a cross section perpendicular to the circumferential direction for explaining a slide ring seal mechanism of a CT apparatus according to a third embodiment of the present invention.

[0124] In addition, the CT apparatus of the third embodiment may include the brush assembly of the first and second embodiments, and in addition, a slip ring sealing mechanism is further provided for the portion of the slip ring 103 other than the portion overlapping with the brush assembly. The slip ring sealing mechanism will be mainly described below, and the structure of the brush assembly included in the CT apparatus of the third embodiment may refer to the description of the brush assembly of the first and second embodiments.

[0125] like Figure 7 As shown, the CT apparatus of this embodiment includes a slip ring 103 and a slip ring sealing mechanism. The slip ring sealing mechanism includes a first portion 501 , a second portion 502 , and a third portion 503 .

[0126] The first part 501, the second part 502 and the third part 503 as the slip ring sealing mechanism are arranged along the circumferential direction of the slip ring 103. The first part 501, the second part 502 and the third part 503 are not arranged throughout the entire circumferential direction of the slip ring 103, but are arranged along the circumferential direction of the slip ring 103 except for the part overlapping with the brush assembly ( Figure 7 The part other than the circled part in the figure.

[0127] Fig. 8A and Figure 8B The structure of the first portion 501 when viewed in a cross section perpendicular to the circumferential direction is shown. Since the structures of the first portion 501, the second portion 502 and the third portion 503 are substantially the same, the detailed description of the structure of the cross section perpendicular to the circumferential direction of the second portion 502 and the third portion 503 is omitted.

[0128] like Fig. 8A and Figure 8B As shown, the slide ring sealing mechanism surrounds the slide ring 103 supported by the slide ring fixing ring 4 so as to substantially seal the slide ring 103 .

[0129] The sliding ring sealing mechanism comprises a sealed fixing plate 1 , a sliding ring housing 2 and a sliding ring housing sealing plate 3 .

[0130] The sealed fixing plate 1 is attached to the main frame 5 as the platform fixing part between the slip ring 103 and the main frame 5 as the platform fixing part. The sealed fixing plate 1 can be fixed to the main frame 5 by screws.

[0131] The slip ring housing 2 is mounted on the sealed fixing plate 1 in a manner that surrounds the radial outer side of the slip ring 103 and the opposite side of the slip ring 103 that is opposite to the main frame 5. The slip ring housing 2 is mounted on the sealed fixing plate 1 by, for example, bonding. When viewed in a cross section perpendicular to the circumferential direction, the slip ring housing 2 is an inverted L-shape. In addition, the slip ring housing 2 may be an integrally formed component.

[0132] The slip ring housing sealing plate 3 is installed on the slip ring housing 2 in a manner of covering the radial inner side of the slip ring 103. The material of the slip ring housing sealing plate 3 can be the same as that of the slip ring housing 2. The slip ring housing sealing plate 3 can be installed on the slip ring housing 2 by bonding, riveting, welding, screwing, etc. In addition, the slip ring housing sealing plate 3 is tightly connected to the sealing plate 50 of the brush assembly mentioned above.

[0133] Thus, the second space substantially sealingly surrounding the slide ring 103 is formed by the sealing fixing plate 1, the slide ring housing 2 and the slide ring housing sealing plate 3, thereby guiding the wear powder to flow in the second space and effectively preventing the wear powder from scattering.

[0134] In addition, preferably, when viewed in a cross section perpendicular to the circumferential direction, the sliding ring housing sealing plate 3 and the sliding ring housing 2 are integrally formed into a U-shape, thereby facilitating component processing and enhancing the sealing effect.

[0135] In addition, it is preferred that the sealed fixing plate 1 is installed on the main frame 5 in a manner that at least a portion of the sealed fixing plate 1 is spaced apart from the main frame 5. In addition, it is preferred that at least a portion of the sealed fixing plate 1 is spaced apart from the main frame 5 by a distance of 5 mm or more. This prevents the sealed fixing plate 1 from interfering with the main frame 5 and generating abnormal noises such as rattling.

[0136] In addition, it is preferred that at least a portion of the sealed fixing plate 1 ( Figure 8B left side) and the main frame 5, and at least one portion of the other sealed fixing plate 1 ( Figure 8B A sealing gasket 6 is sandwiched between the right side of the housing and the sliding ring housing 2 described later. Here, the sealing gasket 6 is made of a material that can be elastically deformed, such as rubber, and the sealing gasket 6 is sandwiched in a manner that is compressed and elastically deformed. In this way, the sealing effect can be enhanced, and abnormal noises such as clicking sounds caused by contact between the components can be prevented.

[0137] As can be seen from the above, the brush assembly and the first part 501, the second part 502 and the third part 503 as the slip ring sealing mechanism are arranged throughout the entire circumferential direction of the slip ring 103 of the CT device of this embodiment. Moreover, at the position where the brush assembly is arranged, the brush 10, the brush holder 20, the dust collecting mechanism 30, the air duct baffle 40, the sealing plate 50, the wear powder baffle 60 and the slip ring 103 together form a roughly sealed first space that can guide the flow of wear powder. On the other hand, the first part 501, the second part 502 and the third part 503 as the slip ring sealing mechanism respectively form a roughly sealed second space. In addition, the sealing plate 50 of the brush assembly is tightly connected to the slip ring housing 2, and the wear powder baffle 60 is tightly connected to the slip ring housing sealing plate 3. As a result, a good closed space relative to the wear powder is formed throughout the entire circumference of the slip ring 103, which can effectively prevent the wear powder from flying and shorten the wear powder collection stroke.

[0138] In addition, a good enclosed space relative to the wear powder is formed throughout the entire circumference of the slip ring 103. When the suction mechanism 303 is working, negative pressure will be generated in the relatively enclosed space, which can efficiently guide and attract the wear powder to be collected in the dust collecting mechanism 30.

[0139] (Variation Example)

[0140] In addition, in the description of the above embodiment, the brush holder 20 is provided with two openings L and cutouts K, but the present invention is not limited thereto. According to actual conditions, the brush holder 20 may be provided with one opening L and cutouts K, or may be provided with three or more openings L and cutouts K. As long as the number of the openings L and cutouts K corresponds to the number of the brushes 10 and the number of the dust collecting mechanisms 30, it will be sufficient.

[0141] In addition, in the description of the above embodiment, the sliding ring sealing mechanism is illustrated as including three parts: a first part 501, a second part 502 and a third part 503, but it is not limited to three parts, and can be other numbers of parts according to actual conditions, technological development conditions, product specifications, etc.

[0142] In the second embodiment, an example is shown in which both the noise prevention mechanism and the wear powder blocking cover are provided. However, the present invention is not limited thereto, and the brush assembly may include only one of the noise prevention mechanism and the wear powder blocking cover.

[0143] Several embodiments and examples of the present invention have been described above, but these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

Claims

1. A brush assembly for a CT device having a slip ring and a gantry fixing portion, characterized in that: have: The brush holder is in the shape of an arc-shaped plate with an opening, and is arranged on the stand fixing portion; A brush mounted on the brush holder and in contact with the slip ring to transmit power or signals; and The wear powder collecting mechanism is mounted on the brush holder so as to form a substantially sealed space with the brush and the brush holder.

2. The brush assembly according to claim 1, characterized in that: The wear powder collecting mechanism comprises: A dust collecting mechanism is mounted radially outside the brush holder on a surface of the brush holder on a side where the brush is mounted and near a contact portion between the brush and the slip ring; An air duct baffle is installed at the opening of the brush holder and at two ends along the circumferential direction; a sealing plate mounted on a surface of the brush holder on the opposite side to the side on which the brush is mounted, and mounted on a radially outer portion of the brush holder so as to be close to the slip ring from the radially outer side; and The wear powder baffle is mounted on the radially inner side of the brush holder so as to face the sealing plate with the air duct baffle interposed therebetween.

3. The brush assembly according to claim 2, characterized in that: The dust collecting mechanism comprises: A box body, one surface of which is mounted on the brush holder, a chamber is formed inside the box body and is open to a surface side opposite to the surface of the box body mounted on the brush holder, a powder inlet for sucking wear powder is formed on the surface located on the radial inner side when the box body is mounted on the brush holder, and an opening is formed on the surface located on the radial outer side when the box body is mounted on the brush holder; Adsorbent cotton, detachably mounted in the chamber of the box body; and The air suction mechanism is installed on the box body in a manner of being communicated with the opening.

4. The brush assembly according to claim 3, characterized in that: The air duct baffle is formed in an L-shaped cross section, and extends radially from a radially inner side than a radially inner side of a contact portion between the brush and the slip ring to a radially outer side than a radially outer side of a contact portion between the brush and the slip ring. The radial outer end of the air duct baffle is close to the circumferential outer end of the powder inlet. The air duct baffle extends from the surface of the brush holder along a direction perpendicular to the plate surface of the brush holder toward the direction in which the brush is installed to the root of the brush column of the brush.

5. The brush assembly according to claim 2, characterized in that: The plate surface of the sealing plate extends along an arc having the same arc as that of the brush holder. The arc length of the sealing plate is greater than the arc length of the brush holder at the same diameter, The sealing plate is attached to the brush holder at a position radially outward of the opening.

6. The brush assembly according to claim 2 or 5, characterized in that: The radial cross section of the sealing plate is an inverted L-shape. A fin is formed on the sealing plate toward the inner side of the arc, A cutout portion is formed on the sealing plate, and the dust collecting mechanism is accommodated in the cutout portion.

7. The brush assembly according to claim 2, characterized in that: The surface of the wear powder baffle plate extends along an arc having the same arc as that of the brush holder. The arc length of the wear powder baffle is equal to the arc length of the brush holder at the same diameter. The wear powder baffle is attached to the brush holder at a position radially inward of the opening.

8. The brush assembly according to claim 2, characterized in that: The radial cross section of the wear powder baffle is an inverted L shape. Fins are formed on the wear powder baffle toward the outer side of the arc shape.

9. The brush assembly according to any one of claims 2, 7 or 8, characterized in that: The wear powder baffle is arranged close to the slip ring in a direction perpendicular to the plate surface of the brush holder. The distance between the wear powder baffle and the slip ring in a direction perpendicular to the surface of the brush holder is greater than 5 mm.

10. The brush assembly according to claim 3, characterized in that The air suction mechanism is an axial flow fan, a centrifugal fan or a bladeless fan.

11. The brush assembly according to claim 3, characterized in that The brush assembly also has: The noise-proof mechanism surrounds the air suction mechanism and is arranged in the box body in a manner that the air outlet is exposed.

12. The brush assembly according to claim 11, characterized in that The noise preventing mechanism is formed into a hexahedron in which two adjacent faces are open.

13. The brush assembly according to claim 8, characterized in that The brush assembly also has: The abrasion powder blocking cover extends from the partition between the box body and the fan toward the direction of the air outlet of the air suction mechanism to block the air outlet of the air suction mechanism.

14. A CT device comprising: Stand fixing part; Slip rings; and The brush assembly according to any one of claims 1 to 13.

15. The CT device according to claim 14, characterized in that: A slip ring sealing mechanism is provided along the slip ring except for a portion of the slip ring overlapping with the brush assembly, and surrounds the slip ring so as to substantially seal the slip ring.

16. The CT device according to claim 15, characterized in that: The sliding ring sealing mechanism comprises: a slip ring housing mounted on the platform fixing portion so as to surround the radial outer side of the slip ring and the side of the slip ring opposite to the side facing the platform fixing portion; and The slip ring housing sealing plate is mounted on the slip ring housing in a manner of covering the radial inner side of the slip ring.

17. The CT device according to claim 16, characterized in that: The sliding ring sealing mechanism comprises: A sealed fixing plate, mounted on the platform fixing portion between the slip ring and the platform fixing portion; a slip ring housing mounted on the sealed fixing plate so as to surround the radial outer side of the slip ring and the side of the slip ring opposite to the side facing the mounting fixing portion; and The slip ring housing sealing plate is mounted on the slip ring housing in a manner of covering the radial inner side of the slip ring.

18. The CT device according to claim 17, characterized in that: The sealed fixing plate is mounted on the stand fixing portion in a manner such that at least a portion of the sealed fixing plate is spaced apart from the stand fixing portion.

19. The CT device according to claim 17 or 18, characterized in that: A sealing gasket is interposed between the at least one portion of the sealed fixing plate and the stand fixing portion, and between the at least another portion of the sealed fixing plate and the slip ring housing.

20. The CT device according to claim 19, characterized in that: The sealing gasket is made of a material capable of elastic deformation. The sealing gasket is interposed so as to be compressed and elastically deformed.

21. The CT device according to claim 16 or 17, characterized in that: When observing in a cross section perpendicular to the circumference, The slip ring housing is in an inverted L shape.

22. The CT device according to claim 16 or 17, characterized in that: The sliding ring housing sealing plate is integrally formed with the sliding ring housing into a U shape.

23. The CT device according to claim 16 or 17, characterized in that: A distance between the slip ring housing sealing plate and a radially inner edge of a surface of the slip ring on a side facing the mount fixing portion is 5 mm or more.

24. The CT device according to claim 18, characterized in that: The interval between the at least a portion of the sealed fixing plate and the stand fixing portion is 5 mm or more.

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