Square middle beam, lenses and glasses

The utility model discloses a square middle beam, lenses and glasses, which are used for improving the firmness of the glasses. The square middle beam is characterized in that the square middle beam comprises a nose support arm, a left fixing arm, a right fixing arm and a connecting beam, one end of the nose support arm is fixedly connected with the connecting beam, the left fixing arm is fixed to the left end of the connecting beam, and the right fixing arm is connected with the right end of the connecting beam; a left tooth nail is arranged on the left fixing arm, a right tooth nail is arranged on the right fixing arm, the left tooth nail and the right tooth nail are used for being connected with a lens, and the cross section of the left tooth nail and the cross section of the right tooth nail are non-circular cross sections. 本申请公开了一种方形中梁、镜片以及眼镜，用于提高眼镜的牢固性。本申请包括：一种方形中梁，其特征在于，包括：鼻托臂、左固定臂、右固定臂以及连接梁，所述鼻托臂的一端与所述连接梁固定连接，所述左固定臂固定于所述连接梁的左端，所述右固定臂与所述连接梁的右端连接；所述左固定臂上设置有左牙钉，所述右固定臂上设置有右牙钉，所述左牙钉以及所述右牙钉用于与镜片连接，所述左牙钉以及所述