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A precise positioning device for an ionization chamber used in a medical accelerator

A precise positioning and ionization chamber technology, which is applied in the fields of therapy, radiotherapy, X-ray/γ-ray/particle irradiation therapy, etc., can solve the problems of difficult to adjust the positioning error, the influence of processing accuracy is large, and the ionization chamber is damaged. Small impact, meet the requirements of precise positioning, and the effect of accurate adjustment

Active Publication Date: 2019-05-17
江苏海明医疗器械有限公司
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Problems solved by technology

Usually, the micro switch is used for rough positioning, and then the V-shaped groove and the roller are used for fine positioning. This kind of positioning device is greatly affected by the machining accuracy, and it is difficult to adjust and has positioning errors.
During operation, when the torsion spring drive roller cooperates with the V-shaped groove, the impact is relatively large, which may easily cause damage to the ionization chamber

Method used

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  • A precise positioning device for an ionization chamber used in a medical accelerator
  • A precise positioning device for an ionization chamber used in a medical accelerator

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Embodiment Construction

[0018] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0019] as attached figure 1 As shown, the present invention provides a precision positioning device for an ionization chamber for a medical accelerator, which includes a substrate, a guide mechanism, a driving mechanism, a tensioning mechanism, a positioning mechanism and an ionization chamber;

[0020] The guiding mechanism comprises a guiding slide bar 3, a screw mandrel 4 and a screw nut cover 5, and the profile of the screw nut cover 5 is rectangular;

[0021] The drive mechanism includes a pulley 13, a synchronous belt 14, a geared motor 15, a motor bracket 16, a coupling 17, an encoder 18 and an encoder bracket 19;

[0022] The tensioning mechanism includes a retaining ring 6 and a compression spring 7;

[0023] The positioning mechanism includes an ionization chamber seat 8, a positioning block 10, an adjusting screw 11 and a locking nut 12;

[0...

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Abstract

The invention discloses a device for precise positioning of an ionization chamber for a medical accelerator, and belongs to the technical field of radiotherapy instruments. The positioning device comprises a base plate, a guiding mechanism, a driving mechanism, a tensioning mechanism, a positioning mechanism and the external ionization chamber. The guiding mechanism is fixedly installed on the base plate. The ionization chamber is fixedly connected with a motion component in the guiding mechanism so as to move relative to the base plate. The driving mechanism is connected with the guiding mechanism and drives the motion part of the guiding mechanism to move. The tensioning mechanism is installed on the motion component in the guiding mechanism, and applies elastic pre-tightening force to the ionization chamber in real time before the ionization chamber is in place; after the ionization chamber is in place, the ionization chamber is positioned precisely through the positioning mechanism and the tensioning mechanism.

Description

technical field [0001] The invention relates to a device for positioning an ionization chamber in a medical accelerator, in particular to a precise positioning device for an ionization chamber for a medical accelerator, which belongs to the technical field of radiotherapy equipment. Background technique [0002] When using an accelerator to treat tumor patients with radiation, it is required that the position and dose of the treatment beam can be precisely controlled to ensure the quality of the radiation beam. Usually, the micro switch is used for rough positioning, and then the V-shaped groove is used to cooperate with the roller for fine positioning. This kind of positioning device is greatly affected by the machining accuracy, and it is difficult to adjust and has positioning errors. During operation, when the torsion spring driving roller cooperates with the V-shaped groove, the impact is relatively large, which may easily cause damage to the ionization chamber. Conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/1048A61N5/1077A61N2005/1092
Inventor 沙福泰吴建兴柘江王春波柏磊
Owner 江苏海明医疗器械有限公司
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