Cathode structure of X-ray tube assembly

Abstract

The utility model discloses a cathode structure of an X-ray tube assembly, which comprises a tube core cathode end, a high-voltage cable reel arranged on the tube core cathode end and a plurality of electric conductors electrically connected with the high-voltage cable reel, and the plurality of electric conductors are arranged between the high-voltage cable reel and the tube core cathode end. The cathode end of the tube core is provided with a plurality of conductive areas corresponding to the plurality of conductors, and conductive contact pins are telescopically arranged in the conductors and are electrically connected with the conductive areas. Through the above mode, the conductive contact pin of the cathode structure of the X-ray tube assembly disclosed by the utility model is telescopically arranged, and the conductive contact pin is electrically connected with the conductive area of the cathode end of the tube core, so that the contact between the cable and the cathode end of the tube core is stable, the telescopic state of the conductive contact pin can be changed according to heating and cooling, the virtual connection phenomenon is avoided, and the service life of the X-ray tube assembly is prolonged. And the phenomenon of sparking and arcing of the X-ray tube core is not easily caused, and the safety is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of X-rays, in particular to a cathode structure of an X-ray tube assembly. Background Art

[0002] The X-ray tube core assembly is the main core component of the CT machine. The X-ray tube core assembly is a vacuum diode working under high voltage. Generally, the cathode high-voltage cable and the cathode end of the X-ray tube core assembly are connected, which is a necessary component for the X-ray tube assembly to generate X-rays. The cable provides negative high voltage to the X-ray tube core through the cathode end, so that the electron cloud in the X-ray tube core assembly moves quickly to the anode area, thereby achieving the purpose of generating X-rays.

[0003] However, in the traditional way, the wiring method between the high-voltage cable and the cathode end is a simple one-to-one plug-in interface connection, which cannot be moved after connection. The contact position of the traditional plug-in connection will have a false connection after repeated heating and cooling, which can easily cause the X-ray tube core assembly to ignite and arc, and is not very safe. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a cathode structure of an X-ray tube assembly, which can solve the above technical problems.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a cathode structure of an X-ray tube assembly, comprising a tube core cathode end, a high-voltage cable reel arranged on the tube core cathode end, and a plurality of conductors electrically connected to the high-voltage cable reel, characterized in that the plurality of conductors are arranged between the high-voltage cable reel and the tube core cathode end, the tube core cathode end is provided with a plurality of conductive areas corresponding to the plurality of conductors, wherein a conductive contact pin is retractably provided in the conductor, and the conductive contact pin is electrically connected to the conductive area.

[0008] Furthermore, a receiving groove is provided in the conductor along its length direction, a squeezing spring is provided in the receiving groove, and a conductive extension rod received in the receiving groove is extended from one end of the conductive contact pin, wherein one end of the squeezing spring is supported on the top wall of the receiving groove, and the other end of the squeezing spring is supported on the top end of the conductive extension rod.

[0009] Furthermore, a clamping block is provided on the inner wall of the receiving groove, and the clamping block divides the receiving groove into a first receiving groove and a second receiving groove located below the first receiving groove, wherein the top end of the conductive extension rod is provided with a clamping portion located in the first receiving groove and clamped by the clamping block, and the extrusion spring is located in the first receiving groove, one end of the extrusion spring is arranged on the top wall of the first receiving groove, and the other end of the extrusion spring is arranged in the clamping portion.

[0010] Furthermore, the distance between the top wall of the first receiving groove and the locking block is smaller than the length of the extrusion spring in a normal state.

[0011] Furthermore, the clamping block is in an annular shape, and the clamping portion is in a circular shape, wherein the outer diameter of the clamping portion is larger than the aperture of the inner hole of the clamping block.

[0012] Furthermore, the first receiving groove and the second receiving groove are cylindrical, and the conductive extension rod is cylindrical, wherein the outer diameter of the clamping portion is smaller than the aperture of the first receiving groove, and the aperture of the second receiving groove is larger than the outer diameter of the conductive extension rod.

[0013] Furthermore, the conductive contact pin is cylindrical, and the outer diameter of the conductive contact pin is larger than the aperture of the second receiving groove.

[0014] Furthermore, the conductive area is provided with a plurality of concave holes, and the conductive contact pin is provided with a plurality of convex tips inserted into the plurality of concave holes.

[0015] Furthermore, a protrusion is provided at a bottom end of the conductive contact needle away from the conductor, and the plurality of protrusions are arranged at intervals at the bottom end of the protrusion.

[0016] Furthermore, the protrusion is cylindrical, wherein the outer diameter of the protrusion is greater than the outer diameter of the conductive contact pin.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a cathode structure of an X-ray tube assembly, which has the following beneficial effects: the cathode structure of the X-ray tube assembly disclosed in the utility model includes a tube core cathode end, a high-voltage cable reel arranged on the tube core cathode end, and a plurality of conductors electrically connected to the high-voltage cable reel, wherein the plurality of conductors are arranged between the high-voltage cable reel and the tube core cathode end, the tube core cathode end is provided with a plurality of conductive areas corresponding to the plurality of conductors, a conductive contact pin is retractably arranged in the conductor, and the conductive contact pin is electrically connected to the conductive area. In the above manner, the conductive contact pin of the cathode structure of the X-ray tube assembly disclosed in the utility model can be retractably arranged, and the conductive contact pin is electrically connected to the conductive area of ​​the tube core cathode end, so that the contact between the cable and the tube core cathode end is stable, so that the conductive contact pin can change the retractable state according to heating and cooling, and there will be no virtual connection phenomenon, and it is not easy to cause the X-ray tube core to ignite and arc, and the safety is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the cathode structure of the X-ray tube assembly of the utility model;

[0020] Figure 2 for Figure 1 A first partial structural schematic diagram of the cathode structure of the X-ray tube assembly;

[0021] Figure 3 for Figure 1 A schematic diagram of the structure of the conductor of the cathode structure of the X-ray tube assembly;

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-section structure of the conductor;

[0023] Figure 5 for Figure 4 A schematic diagram of the first partial structure of the conductor;

[0024] Figure 6 for Figure 4 A schematic diagram of a second partial structure of the conductor in the middle;

[0025] Figure 7 for Figure 1 A schematic diagram of the structure of the cathode end of the tube core of the cathode structure of the X-ray tube assembly;

[0026] Figure 8 for Figure 7 Schematic diagram of the enlarged structure of local structure A. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1-8 The utility model provides a cathode structure of an X-ray tube assembly, including a tube core cathode terminal 10, a high-voltage cable drum 11 arranged on the tube core cathode terminal 10, and a plurality of conductors 12 electrically connected to the high-voltage cable drum 11.

[0029] It should be understood that the high-voltage cable reel can be set on the cathode end 10 of the tube core by threaded connection, and the cathode end 10 of the tube core and the high-voltage cable reel 11 of this embodiment can be implemented by products in the prior art, and their principles and structures are not described here one by one.

[0030] A plurality of conductors 12 are arranged between the high-voltage cable drum 12 and the cathode end 10 of the tube core. It should be understood that the conductors 12 are partially fixed in the high-voltage cable drum 12, that is, the conductors 12 are electrically connected to the cables of the high-voltage cable drum 12.

[0031] In this embodiment, the cathode end 10 of the tube core is provided with a plurality of conductive areas 101 corresponding to the plurality of conductors 12, wherein a conductive contact pin 13 is retractably provided in the conductor 12, and the conductive contact pin 13 is electrically connected to the conductive area 101. It should be understood that since the conductive contact pin 13 is retractably provided in the conductor 12, the conductive contact pin 13 can change the retracted state according to heating and cooling, so that the contact between the cable and the cathode end 10 of the tube core is stable, and there will be no virtual connection phenomenon, which is not easy to cause the X-ray tube core to ignite and arc, and the safety is relatively high.

[0032] Preferably, a receiving groove is provided in the conductor 12 along its length direction, and a squeezing spring 14 is provided in the receiving groove. A conductive extension rod 15 is extended from one end of the conductive contact pin 13 and is received in the receiving groove, wherein one end of the squeezing spring 14 is supported on the top wall of the receiving groove, and the other end of the squeezing spring 14 is supported on the top end of the conductive extension rod 15.

[0033] Furthermore, a clamping block 120 is provided on the inner wall of the receiving groove, wherein the clamping block 120 divides the receiving groove into a first receiving groove 121 and a second receiving groove 122 located below the first receiving groove 121, and a clamping portion 151 is provided at the top end of the conductive extension rod 15 which is located in the first receiving groove 121 and is clamped by the clamping block 120.

[0034] Further, the extrusion spring 14 is in the first receiving groove 121, one end of the extrusion spring 14 is arranged on the top wall of the first receiving groove 121, and the other end of the extrusion spring 14 is arranged in the clamping portion 151. It should be understood that the extrusion spring 14, the conductor 12 and the conductive contact pin 13 of this embodiment are all conductive.

[0035] Preferably, the distance between the top wall of the first receiving groove 121 and the locking block 120 is smaller than the length of the extrusion spring 14 in a normal state, so that in a normal state, the extrusion spring 14 squeezes the locking portion 151 to move toward the second receiving groove 122 .

[0036] In this embodiment, the locking block 120 is in a ring shape, and the locking portion 151 is in a circular shape, wherein the outer diameter of the locking portion 151 is greater than the diameter of the inner hole of the locking block 120 .

[0037] Furthermore, the first receiving groove 121 and the second receiving groove 122 are cylindrical, and the conductive extension rod 15 is cylindrical, wherein the outer diameter of the clamping portion 151 is smaller than the aperture of the first receiving groove 121, and the aperture of the second receiving groove 122 is larger than the outer diameter of the conductive extension rod 15, that is, the aperture of the first receiving groove 121 is larger than the outer diameter of the conductive extension rod 15.

[0038] Preferably, the conductive contact pin 13 is cylindrical, and the outer diameter of the conductive contact pin 13 is larger than the aperture of the second receiving groove 122 .

[0039] In this embodiment, the conductive area 101 is provided with a plurality of recessed holes 102 , wherein the conductive contact pin 13 is provided with a plurality of protrusions 131 inserted into the plurality of recessed holes 102 , so that the connection between the conductive contact pin 13 and the conductive area 101 is more stable.

[0040] Furthermore, a protrusion 130 is provided at the bottom end of the conductive contact pin 13 away from the conductor 12 , wherein a plurality of protrusions 131 are arranged at intervals at the bottom end of the protrusion 130 .

[0041] Preferably, the protrusion 130 is cylindrical, wherein the outer diameter of the protrusion 130 is greater than the outer diameter of the conductive contact pin 13. It should be understood that the protrusion 130 is provided to increase the contact area with the conductive area 101.

[0042] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cathode structure of an X-ray tube assembly, comprising a cathode end of a tube core, a high-voltage cable reel disposed on the cathode end of the tube core, and a plurality of conductors electrically connected to the high-voltage cable reel, characterized in that: The plurality of conductors are arranged between the high-voltage cable reel and the cathode end of the tube core, and the cathode end of the tube core is provided with a plurality of conductive areas corresponding to the plurality of conductors, wherein conductive contact pins are retractably provided in the conductors, and the conductive contact pins are electrically connected to the conductive areas.

2. The cathode structure of the X-ray tube assembly according to claim 1, characterized in that: A receiving groove is provided in the conductor along its length direction, and a squeezing spring is provided in the receiving groove. A conductive extension rod is extended from one end of the conductive contact pin and received in the receiving groove, wherein one end of the squeezing spring is supported on the top wall of the receiving groove, and the other end of the squeezing spring is supported on the top end of the conductive extension rod.

3. The cathode structure of the X-ray tube assembly according to claim 2, characterized in that: A clamping block is provided on the inner wall of the receiving groove, and the clamping block divides the receiving groove into a first receiving groove and a second receiving groove located below the first receiving groove, wherein the top end of the conductive extension rod is provided with a clamping portion located in the first receiving groove and clamped by the clamping block, and the extrusion spring is located in the first receiving groove, one end of the extrusion spring is arranged on the top wall of the first receiving groove, and the other end of the extrusion spring is arranged in the clamping portion.

4. The cathode structure of the X-ray tube assembly according to claim 3, characterized in that: The distance between the top wall of the first receiving groove and the locking block is smaller than the length of the pressing spring in a normal state.

5. The cathode structure of the X-ray tube assembly according to claim 3, characterized in that: The clamping block is in an annular shape, and the clamping portion is in a circular shape, wherein the outer diameter of the clamping portion is larger than the aperture of the inner hole of the clamping block.

6. The cathode structure of the X-ray tube assembly according to claim 3, characterized in that: The first receiving groove and the second receiving groove are cylindrical, and the conductive extension rod is cylindrical, wherein the outer diameter of the clamping portion is smaller than the aperture of the first receiving groove, and the aperture of the second receiving groove is larger than the outer diameter of the conductive extension rod.

7. The cathode structure of the X-ray tube assembly according to claim 3, characterized in that: The conductive contact pin is cylindrical, and the outer diameter of the conductive contact pin is larger than the aperture of the second receiving groove.

8. The cathode structure of an X-ray tube assembly according to claim 3, characterized in that: The conductive area is provided with a plurality of concave holes, and the conductive contact pin is provided with a plurality of convex tips inserted into the plurality of concave holes.

9. The cathode structure of an X-ray tube assembly according to claim 8, characterized in that: A protrusion is provided at the bottom end of the conductive contact pin away from the conductor, and the plurality of protrusions are arranged at intervals at the bottom end of the protrusion.

10. The cathode structure of the X-ray tube assembly according to claim 9, characterized in that: The protrusion is cylindrical, wherein the outer diameter of the protrusion is greater than the outer diameter of the conductive contact pin.

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