CT detector module structure

Abstract

The utility model relates to a CT (Computed Tomography) detector module structure, which is characterized in that each corner end of a support table surface on the upper side of a support is provided with a positioning boss, a scintillator PCB (Printed Circuit Board) and an ASG (Amplified Spontaneous Grating) module are fixed on the support table surface through a plurality of locking elements, the lower ends of the locking elements are inserted into assembly positioning holes in the corresponding positioning bosses, the locking elements are provided with isolation convex parts, and the isolation convex parts are fixed on the support table surface through the positioning bosses. An isolation protruding part is arranged on the scintillator PCB and is arranged between the scintillator PCB and the ASG module, a connecting plate limiting plate and a grating limiting plate are arranged on the lower side of the ASG module, a scintillator is arranged in the middle of the scintillator PCB, the connecting plate limiting plate is in contact with the longitudinal side face of the corresponding side of the scintillator, and the grating limiting plate is in contact with the transverse side face of the corresponding side of the scintillator. According to the utility model, the accurate assembly and positioning of each part are ensured, and the installation requirements of different convex part shapes of the scintillator PCB can be better met.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, and particularly to a CT detector module structure. Background Art

[0002] The core components in a CT detector include components such as an ASG, a scintillator, and an aluminum profile bracket. Among them, the ASG (the full English name is Anti-Scatter grid, and the Chinese name is anti-scatter grid) is provided with an anti-scatter grid, whose function is to absorb scattered X-rays, prevent them from interfering with the image, and ensure that the sensor of the detector will not be interfered by X-rays. The scintillator, as a component for data acquisition and photoelectric signal conversion, is generally embodied in the form of a PCB board. The ASG and the scintillator are installed on the aluminum profile bracket to obtain protection, and at the same time, they can withstand the impact of external forces such as CT centrifugal force. Moreover, the aluminum profile bracket can transfer heat to achieve a heat dissipation effect. The assembly accuracy requirements of a CT detector are relatively high and will affect the imaging quality. Therefore, in the prior art, there have emerged some positioning structures for ASG modules. For example, a patent with the patent number 202120495297.9 discloses a precision CT detector module, which includes an ASG, a detector unit, and a fixed base. However, the overall structure of this device is symmetrically arranged, and the device realizes assembly positioning through the positioning groove on the lower side of the ASG and the positioning long holes and positioning surfaces on the connecting plates on both sides of the ASG. For some asymmetric CT detector modules, the above positioning structure is not applicable, especially in the case where the surface of the scintillator PCB board has irregular protrusions due to the setting of electronic components. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a CT detector module structure, which can not only ensure the accurate assembly positioning of each component, but also better meet the installation needs of different protrusion shapes of the scintillator PCB board.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] A CT detector module structure includes a bracket, a scintillator PCB board, and an ASG module. Among them, a bracket table surface is provided on the upper side of the bracket, and positioning bosses with assembly positioning holes are provided at each corner end of the bracket table surface. The scintillator PCB board and the ASG module are fixed on the bracket table surface from bottom to top through a plurality of locking elements, and the lower ends of the locking elements are inserted into the assembly positioning holes on the corresponding positioning bosses. An isolation protrusion is provided on the locking element, and the isolation protrusion is arranged between the scintillator PCB board and the ASG module. A connecting plate limiting plate and a grid limiting plate are provided on the lower side of the ASG module. A scintillator is provided in the middle of the scintillator PCB board, and the connecting plate limiting plate is in contact with the corresponding longitudinal side surface of the scintillator, and the grid limiting plate is in contact with the corresponding transverse side surface of the scintillator.

[0006] One side of the bracket tabletop is provided with a first support seat, and the other side is provided with a second support seat. Moreover, on the first support seat tabletop at the upper end of the first support seat and on the second support seat tabletop at the upper end of the second support seat, a support seat positioning pin hole is provided in the middle, and support seat connection holes are provided on both sides.

[0007] Both sides of the bracket tabletop are provided with support seats, and at least one side of the support seats is connected to the bracket through a connecting arm, and an installation space is formed on the upper side of the connecting arm.

[0008] The lower end of the bracket is provided with heat dissipation fins.

[0009] The ASG module includes a middle anti-scattering grille and positioning connecting plates respectively arranged on both sides of the anti-scattering grille. Among them, a grille limiting plate is provided on either side at the lower end of the anti-scattering grille, and a connecting plate limiting plate is provided on the lower side of the connecting end of either side positioning connecting plate and the anti-scattering grille.

[0010] Both ends of the anti-scattering grille are provided with grille positioning columns. One end of each of the two positioning connecting plates connected to the anti-scattering grille is provided with a connecting plate limiting boss, and a connecting plate positioning hole is provided on the connecting plate limiting boss. Moreover, the grille positioning columns are respectively inserted into the corresponding connecting plate positioning holes.

[0011] The advantages and positive effects of the present utility model are as follows:

[0012] 1. The present utility model can ensure accurate assembly and positioning of each component. Among them, the scintillator PCB board is supported and positioned by the positioning bosses provided at each corner end of the bracket tabletop. Moreover, the processing area of each positioning boss is small, which is convenient for processing to ensure the flatness and accuracy of the reference. Between the scintillator PCB board and the ASG module, accurate positioning of the two is achieved through the cooperation of structures such as the scintillator, the connecting plate limiting plate, and the grille limiting plate.

[0013] 2. The present utility model can better meet the installation requirements of different protruding part shapes of the scintillator PCB board. Among them, the positioning bosses at each corner end of the bracket tabletop can ensure that there is enough clearance between the scintillator PCB board and the bracket tabletop so that the tiny protruding parts formed due to the setting of electronic components on the scintillator PCB board have enough accommodation space, and at the same time, it is also convenient for heat dissipation. Moreover, the locking element of the present utility model is provided with an isolation protruding part, and the present utility model uses the isolation protruding part to form a gap between the ASG module and the scintillator PCB board to accommodate the tiny protruding parts formed due to the setting of electronic components on the scintillator PCB board, and at the same time, it is also convenient for heat dissipation. In addition, the support seats on both sides of the bracket of the present utility model can also be connected to the bracket body through the connecting arm, so that an installation space can be formed on the upper side of the connecting arm to accommodate the larger protruding parts on the scintillator PCB board.

[0014] 3. The present utility model also simplifies the assembly operation. When assembling the present utility model, the scintillator PCB board is fixed first, and at this time, the upward displacement of the scintillator PCB board can be limited and locked by using the isolation protrusion on the locking element. When assembling the ASG module, the ASG module can be directly placed on the scintillator PCB board, and the position can be adjusted so that the connecting plate limiting plate on the lower side of the ASG module contacts the corresponding longitudinal side surface of the scintillator, and the grid limiting plate contacts the corresponding transverse side surface of the scintillator to complete accurate positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model,

[0016] Figure 2 is Figure 1 a schematic structural diagram of the middle bracket,

[0017] Figure 3 is Figure 2 a schematic diagram of the usage state of the middle support connection hole and the support positioning pin hole,

[0018] Figure 4 is Figure 1 a schematic structural diagram of the anti-scattering grid of the middle ASG module,

[0019] Figure 5 is Figure 1 a schematic structural diagram of the positioning connecting plate of the middle ASG module,

[0020] Figure 6 is Figure 5 the front view of the positioning connecting plate,

[0021] Figure 7 is Figure 1 a three-dimensional schematic diagram of the middle ASG module,

[0022] Figure 8 is Figure 1 the front view of the present utility model,

[0023] Figure 9 is Figure 1 the enlarged view at I in,

[0024] Figure 10 is Figure 8 the A-A view in,

[0025] Figure 11 is Figure 1 the top view of the present utility model,

[0026] Figure 12 is Figure 1 a schematic diagram of the cooperation state between the scintillator PCB board and the bracket.

[0027] Among them, 1 is a bracket, 101 is the first support base, 1011 is the first support base tabletop, 1012 is the installation space, 102 is the second support base, 1021 is the second support base tabletop, 103 is the positioning boss, 104 is the heat dissipation fin, 105 is the support connection hole, 106 is the support positioning pin hole, 107 is the bracket tabletop, 2 is the scintillator PCB board, 201 is the horizontal side, 202 is the vertical side, 3 is the ASG module, 301 is the anti-scattering grid, 3011 is the grid positioning post, 3012 is the grid limiting plate, 302 is the positioning connection plate, 3021 is the installation hole, 3022 is the connection plate positioning hole, 3023 is the connection plate limiting plate, 3024 is the connection plate limiting boss, 4 is the locking element, 401 is the isolation protrusion, and 402 is the locking nut. Detailed implementation mode

[0028] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] As Figures 1 to 12 shown, the present utility model includes a bracket 1, a scintillator PCB board 2, and an ASG module 3. Among them, as Figure 2 shown, a bracket tabletop 107 is provided on the upper side of the bracket 1, and positioning bosses 103 with assembly positioning holes are provided at each corner end of the bracket tabletop 107. As Figure 1 shown, the scintillator PCB board 2 and the ASG module 3 are fixed to the bracket tabletop 107 from bottom to top by a plurality of locking elements 4, and the lower end of the locking element 4 is inserted into the assembly positioning hole on the corresponding positioning boss 103. An isolation protrusion 401 is provided on the locking element 4, and the isolation protrusion 401 is provided between the scintillator PCB board 2 and the ASG module 3. A connection plate limiting plate 3023 and a grid limiting plate 3012 are provided on the lower side of the ASG module 3. A scintillator in the shape of a square (or rectangle) is provided in the middle of the scintillator PCB board 2, and Figures 8 to 10 shown, the connection plate limiting plate 3023 contacts the corresponding side vertical side 202 of the scintillator, and the grid limiting plate 3012 contacts the corresponding side horizontal side 201 of the scintillator.

[0030] As Figure 2 shown, a first support base 101 is provided on one side of the bracket tabletop 107, and a second support base 102 is provided on the other side. A support positioning pin hole 106 is provided in the middle on the upper end of the first support base 101 and support connection holes 105 are provided on both sides, and a support positioning pin hole 106 is provided in the middle on the upper end of the second support base 102 and support connection holes 105 are provided on both sides. As Figure 3 shown, when the present utility model is installed on a corresponding structure, positioning can be achieved first by inserting a positioning pin into the support positioning pin hole 106, and then connection can be achieved by inserting a fastening bolt into the corresponding support connection hole 105.

[0031] As shown Figure 2 in the figure, the utility model is of an asymmetric structure, wherein the first support base 101 is fixedly connected to the body of the bracket 1 through a connecting arm, and an installation space 1012 is formed on the upper side of the connecting arm. As shown Figure 12 in the figure, the electronic components at one end of the scintillator PCB board 2 form a relatively large convex portion, and the convex portion can be placed in the installation space 1012. Additionally, as shown Figure 2 in the figure, in this embodiment, heat dissipation fins 104 are provided at the lower end of the bracket 1 to facilitate heat dissipation.

[0032] As shown Figures 4 to 11 in the figure, the ASG module 3 includes a middle anti-scattering grid 301 and positioning connecting plates 302 respectively arranged on both sides of the anti-scattering grid 301. Among them, as shown Figure 4 in the figure, grid positioning posts 3011 are provided at both ends of the anti-scattering grid 301, and a grid limiting plate 3012 is provided on either side of the lower end. And as shown Figure 5 in the figure, at one end where the two positioning connecting plates 302 are connected to the anti-scattering grid 301, connecting plate limiting bosses 3024 are provided, and connecting plate positioning holes 3022 are provided on the connecting plate limiting bosses 3024. During connection, the grid positioning posts 3011 are respectively inserted into the corresponding connecting plate positioning holes 3022, and a connecting plate limiting plate 3023 is provided on the lower side of the connection end of any one side positioning connecting plate 302 and the anti-scattering grid 301. With the above structure of the utility model, accurate positioning can be ensured during the combined connection of the ASG module 3, and further, the positions of the grid limiting plate 3012 and the connecting plate limiting plate 3023 for assembly positioning can be ensured to be accurate. The anti-scattering grid 301 can be made by 3D printing technology, which is a well-known technology in this field.

[0033] The working principle of the utility model is as follows:

[0034] The scintillator PCB board 2 of the utility model is fixed on the bracket table surface 107 on the upper side of the bracket 1, and as shown Figure 2 in the figure, the scintillator PCB board 2 is supported by the positioning bosses 103 at the respective corner ends of the bracket table surface 107. In this way, on the one hand, sufficient gaps can be ensured between the scintillator PCB board 2 and the bracket table surface 107 so that the small convex portions formed due to the arrangement of the electronic components on the scintillator PCB board 2 have sufficient accommodation space, and at the same time, heat dissipation is facilitated. On the other hand, the processing area of each positioning boss 103 is small, which is also convenient for processing to ensure that the reference is flat and accurate, and further ensure the horizontality of the scintillator PCB board 2.

[0035] In addition, an isolation protrusion 401 is provided on the locking element 4. When the present utility model is assembled, the scintillator PCB board 2 is fixed first. At this time, the upward displacement of the scintillator PCB board 2 can be limited and locked by using the isolation protrusion 401 on the locking element 4. And the isolation protrusion 401 forms a gap between the ASG module 3 and the scintillator PCB board 2 to accommodate the tiny protrusions formed by the arrangement of electronic components on the scintillator PCB board 2, and at the same time, it is also convenient for heat dissipation. The locking element 4 can select structures such as a positioning pin and a positioning bolt according to actual needs. The isolation protrusion 401 can also select a fixing structure according to actual needs, such as an isolation block and an isolation flange plate integrally formed with the locking element 4, or a movable structure, such as an isolation nut and an isolation pad block threadedly sleeved on the locking element 4. When fixing the ASG module 3, as Figure 1 shown, a locking nut 402 can be installed at the upper end of the locking element 4 to realize the connection of each component.

[0036] When the present utility model assembles the ASG module 3, only the ASG module 3 needs to be directly placed on the scintillator PCB board 2 and the position is adjusted. It does not require an additional auxiliary positioning tooling. In addition, the present utility model only sets the grid limiting plate 3012 and the connecting plate limiting plate 3023 on any one side in the horizontal direction and any one side in the vertical direction of the anti-scattering grid 301, and the ASG module 3 on the side without the limiting plate can move freely, so that the ASG module 3 also has sufficient adjustment space during assembly. During assembly, the positioning connecting plate 302 is fixed by the locking element 4, as Figure 5 shown, and the positioning connecting plate 302 is provided with a mounting hole 3021 for the locking element 4 to pass through.

[0037] The present utility model realizes the accurate positioning of the two by the cooperation of the scintillator on the lower side of the scintillator PCB board 2 and the connecting plate limiting plate 3023 and the grid limiting plate 3012 on the lower side of the ASG module 3. At the same time, there is enough gap between the scintillator PCB board 2 and the bracket table surface 107 on the upper side of the bracket 1, and between the ASG module 3 and the scintillator PCB board 2 to accommodate the protrusions on the scintillator PCB board 2 due to the arrangement of electronic components. In addition, as Figure 2 shown, the support seats 101 on both sides of the bracket 1 can also be connected to the bracket 1 body through connecting arms, so that an installation space 1012 can be formed on the upper side of the connecting arms to accommodate the larger protrusions on the scintillator PCB board 2. Therefore, the present utility model can better meet the installation needs of different protrusion shapes of the scintillator PCB board 2 while ensuring the accurate assembly and positioning of each component.

Claims

1. A CT detector module structure, characterized in that: The invention comprises a bracket (1), a scintillator PCB board (2) and an ASG module (3), wherein a bracket table (107) is provided on the upper side of the bracket (1), and each corner end of the bracket table (107) is provided with a positioning boss (103) with an assembly positioning hole, and the scintillator PCB board (2) and the ASG module (3) are fixed on the bracket table (107) from bottom to top through a plurality of locking elements (4), and the lower ends of the locking elements (4) are inserted into the assembly positioning holes on the corresponding positioning bosses (103), and the upper ends of the locking elements (4) are fixed to the bracket table (107) from bottom to top. An isolation protrusion (401) is provided, and the isolation protrusion (401) is provided between the scintillator PCB board (2) and the ASG module (3); a connection plate limit plate (3023) and a grille limit plate (3012) are provided on the lower side of the ASG module (3); a scintillator is provided in the middle of the scintillator PCB board (2); the connection plate limit plate (3023) is in contact with the longitudinal side surface (202) corresponding to the scintillator, and the grille limit plate (3012) is in contact with the transverse side surface (201) corresponding to the scintillator.

2. The CT detector module structure according to claim 1, characterized in that: A first support seat (101) is provided on one side of the support table (107), and a second support seat (102) is provided on the other side, and a support positioning pin hole (106) is provided in the middle of the first support seat table (1011) at the upper end of the first support seat (101) and a second support seat table (1021) at the upper end of the second support seat (102), and support connection holes (105) are provided on both sides.

3. The CT detector module structure according to claim 1, characterized in that: Support seats are provided on both sides of the support table (107), and the support seat on at least one side is connected to the support (1) via a connecting arm, and an installation space (1012) is formed on the upper side of the connecting arm.

4. The CT detector module structure according to claim 1, characterized in that: The lower end of the bracket (1) is provided with a heat dissipation fin (104).

5. The CT detector module structure according to claim 1, characterized in that: The ASG module (3) comprises an anti-scatter grid (301) in the middle and positioning connecting plates (302) arranged on both sides of the anti-scatter grid (301), wherein a grid limiting plate (3012) is arranged on either side of the lower end of the anti-scatter grid (301), and a connecting plate limiting plate (3023) is arranged on the lower side of the connection end of the positioning connecting plate (302) on either side and the anti-scatter grid (301).

6. The CT detector module structure according to claim 5, characterized in that: Both ends of the anti-scatter grid (301) are provided with grid positioning columns (3011), and one end of two positioning connecting plates (302) connected to the anti-scatter grid (301) is provided with a connecting plate limiting boss (3024), the connecting plate limiting boss (3024) is provided with a connecting plate positioning hole (3022), and the grid positioning columns (3011) are respectively inserted into the corresponding connecting plate positioning holes (3022).

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