High-performance vane-inserted single-leaf casement screen door

Abstract

The invention relates to the technical field of screening and discloses a high-performance vane-inserted single-leaf casement screen door, comprising a door leaf and a door frame; the door leaf is provided with a door vane, the door frame is provided with a spring part used with the door vane, the spring part comprises a spring, a spring fastener and a spring seat, the inner wall of the spring seat is provided with spring plates abutted to each other, the spring plates are fixed to the inner wall of the spring seat through the spring fastener, a conductive elastic part is arranged in the spring seat and is arranged in a deformation direction where the door vane is inserted into the spring plates, the door leaf and the door frame are closed and locked in wedged manner, and contact between the spring plates and the door vane is ensured. The high-performance vane-inserted single-leaf casement screen door has high screening efficiency, good performance stability, good convenience of opening and closing, good operation stability and zero noise, the screening efficiency under 40-600 MHz may reach 100 dB and above; the high-performance vane-inserted single-leaf casement screen door is applicable to a screen room with MR (magnetic resonance) equipment having high field strength of 7 T and above.

Description

technical field [0001] The invention relates to the field of shielding technology, more specifically, to a high-performance knife-insert single-leaf casement door used in a nuclear magnetic resonance equipment room in the medical field. Background technique [0002] The screen door is mainly used in the MRI equipment room in the medical field. Its function is to block the influence of external electromagnetic signals on the imaging quality of the equipment. With the increasing market demand for high-field shielding, conventional shielded doors are in the door-slit shielding mode, so it is difficult for ordinary shielded doors to meet the shielding efficiency requirements of high-field MR equipment such as 4.7T, 7T, and 9.4T from various manufacturers. [0003] At present, in order to improve the shielding effect of the shielded door, the close contact structure between the door knife and the beryllium copper reed is usually used, such as Figure 11 As shown, it includes a br...

AI Technical Summary

Problems solved by technology

Although this patent overcomes the problem of high insertion resistance, it has the following problems: 1. By adding two door knives and three metal reeds, the structure is complex and requires high machining accuracy, otherwise the failure rate in mass production 2. There is an internal knife 210 on the door frame, which is easy to scratch people; 3. The fixing method of the gold reed is not disclosed. When the door knife is inserted into the metal reed, the metal The reed will be deformed, and it will be difficult to recover after a long time of use, which will affect the shielding effect

[0005] In addition, the shielded doors in the prior art often have poor sound insulation effect, the locking mechanism between the door leaf and the door frame is laborious and slow, the door leaf is easy to sink after long-term use, the life of the door leaf shaft is short, and installation is inconvenient

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