Disclosed are safety glasses for blocking of harmful electromagnetic radiation and prevention of dazzling which protect eyes from harmful electromagnetic radiation and are ergonomically balanced by arranging the lens portion at the front and the adjuster and battery at the rear side of the temple to ensure convenient wearing of the glasses. The safety glasses include an inner / outer hosing formed of a soft material to closely contact the face of the user and fabricated through double injection molding, thereby ensuring convenient wearing of the glasses.
The invention relates to an automatically matched natural labor bed used in the obstetrics and gynecology department. The automatically matched natural labor bed comprises a supporting plate, a backrest device and a leg supporting device, wherein the backrest device is installed at the top of the left end of the supporting plate and is connected with the leg supporting device through hinge pins. The backrest device comprises a backrest supporting plate, a headrest, a backrest adjusting push rod, an armrest adjusting mechanism and an armrest mechanism. The leg supporting device comprises a bedboard, bed columns, a locking mechanism, a left supporting mechanism, a pedal mechanism and a buffer mechanism. The problems can be solved during delivery of puerperae that a puerpera using an existing bed cannot utilize a guardrail of the labor bed to apply a force, the gripping angle of gripped armrests cannot be adjusted, the legs of the puerpera cannot be fit with the leg supporting device, there is no place for the feet of the puerpera to put, and inward movements of the legs of the puerpera cannot be limited. The functions of providing adjustable-angle supporting for the arms of a puerpera during delivery and fitting, supporting and protecting the legs of the puerpera are achieved.
The invention provides a lifting support. The lifting support comprises a base, a stand column and a lifting seat, wherein the stand column is erected on the base; a first coil spring and a second coil spring are arranged in a containing groove of the stand column. When the lifting seat slides up and down, the first coil spring and the second coil spring are synchronously and gradually spread or coiled up. The supporting force provided by the first coil spring and the supporting force provided by the second coil spring change linearly in the spreading or coiling-up process, and the supportingforce provided by the first coil spring and the supporting force provided by the second coil spring are synchronously and reversely reduced linearly, and the sum of the supporting force provided by the first coil spring and the supporting force provided by the second coil spring keeps constant. One of the first coil spring and the second coil spring is independently coiled up or spread, the firstcoil spring and the second coil spring move in the coiling-up or spreading direction, and the sum of the supporting force provided by the first coil spring and the supporting force provided by the second coil spring changes. The lifting support is simple in structure and adjustable in supporting force, thereby being capable of meeting the use requirements of displayers in different specifications.The universality is good, and the production cost is greatly reduced.