Title:
AIR PASSAGE CONTROL DEVICE FOR USE IN BREATHING MASK AND BREATHING MASK APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/114427
Kind Code:
A1
Abstract:
Provided are an air passage control device (100) for use in a breathing mask (10) and a breathing mask apparatus. The air passage control device (100) comprises a valve assembly (210) and an adjustment mechanism (220). The valve assembly (210) comprises: a valve base (211); a valve cover (212); a valve core (213); and an elastic member (214). The valve cover (212) is rotatably connected to the valve base (211) to form a valve cavity (215). The valve cavity (215) has an air flow path. The valve core (213) is located in the valve cavity (215) and can control the speed of an air flow passing through the air flow path. The elastic member (214) is located in the valve cavity (215) and disposed between the valve core (213) and the valve cover (212) to provide resistance against a movement of the valve core (213) in a predetermined direction. The adjustment mechanism (220) comprises an engagement member (221) and multiple position recesses (222). One of the valve base (211) and the valve cover (212) is provided with the multiple position recesses (222) arranged in a circumferential direction thereof, and the other is provided with the engagement member (221) thereon. The engagement member (221) engages at at least one of the position recesses (222). When the valve cover (212) rotates with respect to the valve base (211), the engagement member (221) can engage at an adjacent position recess (222). Upon adjusting a therapeutic pressure, the air passage control device (100) can provide feedback to a user by feel and sound, thereby performing a series of precise adjustments.
Inventors:
ZHOU MINGZHAO (CN)
WANG YAJIE (CN)
ZHUANG ZHI (CN)
WANG YAJIE (CN)
ZHUANG ZHI (CN)
Application Number:
PCT/CN2016/112690
Publication Date:
July 06, 2017
Filing Date:
December 28, 2016
Export Citation:
Assignee:
BMC MEDICAL CO LTD (CN)
International Classes:
A61M16/06
Foreign References:
| CN105641793A | 2016-06-08 | |||
| CN101642599A | 2010-02-10 | |||
| CN202775821U | 2013-03-13 | |||
| CN101837582A | 2010-09-22 | |||
| CN103083777A | 2013-05-08 | |||
| US5950623A | 1999-09-14 |
Attorney, Agent or Firm:
BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)
Download PDF:
Previous Patent: PRESSURE WASHER AND METHOD FOR IDENTIFYING SPRAY BAR THEREOF
Next Patent: LIGHT SOURCE MODULE AND LIGHTING DEVICE
Next Patent: LIGHT SOURCE MODULE AND LIGHTING DEVICE