RELATED APPLICATION

This application claims priority to Chinese Application No. 201920915581.X, filed Jun. 18, 2019. The entire teachings of the above application are incorporated herein by reference.

TECHNICAL FIELD

The present application relates to blood oxygen saturation detection, and in particular, to an adaptive finger size ring.

BACKGROUND

Blood oxygen saturation is one of the key clinical physiological parameters. Currently, a monitor with a measurement host separated from a photoelectric sensor or a handheld blood oxygen saturation measurement instrument is mainly used for long term continuous measurement. The monitor is relatively large and is not suitable for wearing to perform continuous measurement. The handheld blood oxygen saturation measurement instrument is easy to wear but also easy to fall off. In order to solve the problem that the handheld blood oxygen saturation measurement instrument is easy to fall off, the degree of tightness of the existing handheld blood oxygen saturation measurement instrument are adjusted by using an elastic finger sleeve or a locking strap, but a problem of over-tightening is caused, and a radial pressure is exerted around a finger due to an axial (circumferential) force. Consequently, when the instrument is worn for a long time, poor blood flow and swelling feeling are easily caused, and wearing comfort is affected. In addition, because shapes of fingers are not the same, the photoelectric sensor is not in good contact with skin, and inaccurate measurement is caused.

SUMMARY

An objective of the present application is to provide an adaptive finger size ring, to implement the accuracy of blood oxygen saturation measurement and adaptability of different finger shapes and finger sizes under a comfortable wearing condition.

To solve the above technical problem, one aspect of the present application discloses an adaptive finger size ring, including a first ring body, a second ring body, and two elastic devices. There is a clamping position between the first ring body and the second ring body, and the clamping position is used to clamp a finger. One end of the elastic device is connected to the first ring body, the other end is connected to the second ring body, and the two elastic devices are respectively located on two sides of the clamping position. The elastic device, the first ring body, and the second ring body form an annular shape, the elastic device is telescopic, and has a tendency to shorten in length, so that the clamping position is reduced in size, the first ring body and the second ring body are in close contact with the finger to clamp the finger.

It can be understood that only the first ring body and the second ring body are in close contact with skin of the finger, and the elastic device is not in contact the skin of the finger, thus, the finger is partially under pressure, so that a swelling feeling caused due to poor blood flow when the ring is worn for a long time is avoided, wearing comfort is improved. In addition, the photoelectric detection device is in close contact with the finger, so that the accuracy of blood oxygen saturation measurement is ensured.

