X-ray radiation source

Patent metadata

Field	Value
Publication number	US-9349563-B2
Application number	US-201314380988-A
Country	US
Kind code	B2
Filing date	Feb 7, 2013
Priority date	Mar 2, 2012
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

In an X-ray radiation source, a lid part is fastened to a main part with screws, so that an X-ray tube is secured to a housing while being pressed against an inner surface of the wall part a by a first circuit board. The X-ray tube can be secured stably within the housing by thus being held between the first circuit board and the wall part. The X-ray radiation source uses the first circuit board incorporated in the housing itself for pressing the X-ray tube. This makes it unnecessary to provide new members for pressing the X-ray tube and can prevent the device structure from becoming complicated.

First claim

The invention claimed is:

1. An X-ray radiation source comprising:
an X-ray tube for outputting an X-ray from an output window;
a first circuit board for mounting the X-ray tube; and
a housing containing the X-ray tube and first circuit board and having a wall part formed with an X-ray emission window for emitting to the outside the X-ray outputted from the X-ray tube;
wherein the X-ray tube is secured to the housing while being pressed against an inner surface of the wall part by the first circuit board.

2. An X-ray radiation source according to claim 1 , wherein a conductive buffer member is arranged between the X-ray tube and the inner surface of the wall part so as to come into contact with at least a part of the output window.

3. An X-ray radiation source according to claim 1 , wherein the housing has a main part having the wall part and a lid part for securing thereto the X-ray tube and first circuit board;
wherein the lid part is fastened to the main part by a fastening member so as to press the X-ray tube against the inner surface of the wall part.

4. An X-ray radiation source according to claim 3 , wherein the X-ray tube and first circuit board are supported by a spacer member erected on the lid part.

5. An X-ray radiation source according to claim 4 , further comprising a high voltage generation module for raising a voltage supplied to the first circuit board and a second circuit board for mounting the high voltage generation module;
wherein the high voltage generation module and second circuit board are supported at a position closer to the lid part than are the X-ray tube and first circuit board by the spacer erected on the lid part.

6. An X-ray radiation source according to claim 1 , wherein the X-ray tube is provided with a laterally-projecting power pin;
wherein the first circuit board is provided with a through hole corresponding to a two-dimensional form of the X-ray tube; and
wherein the power pin is connected to an edge part about the through hole while a part of the X-ray tube is located within the through hole, so that the X-ray tube is held by the first circuit board.

7. An X-ray radiation source according to claim 1 , wherein the X-ray tube is provided with a laterally-projecting power pin;
wherein the first circuit board is provided with a depression corresponding to a two-dimensional form of the X-ray tube; and
wherein the power pin is connected to an edge part about the depression while a part of the X-ray tube is located within the depression, so that the X-ray tube is held by the first circuit board.

Assignees

• Hamamatsu Photonics Kk

Inventors

• Kosugi Norimasa
• Okumura Naoki
• Nakamura Tatsuya
• Fujita Toru
• Okada Tomoyuki
• Ujima Akiomi

Classifications

• H01J2235/02

  Electrical arrangements · CPC title

• H01J2235/186

  Electricity · mapped topic

• H01J35/045

  Electrodes for controlling the current of the cathode ray, e.g. control grids · CPC title

• H01J35/18

  Windows · CPC title

• H01J35/025 Primary

  X-ray tubes with structurally associated circuit elements · CPC title