TWI804959B - Blood oxygen concentration measuring device - Google Patents

Abstract

A blood oxygen concentration measuring device comprises a light transmitting cover, a side portion, a substrate fixed on the side portion, at least one light emitting device and a light receiver formed on the substrate, a trigger portion formed on a bottom surface of the substrate, a processing element, a base and an elastic element disposed between the substrate and the base. The elastic element includes an elastic body and a trigger member. A top surface of the elastic body disposed under the bottom surface of the substrate such that an opening of a hole of the elastic body is aligned with the trigger portion. A trigger terminal of the trigger member disposed in the elastic body such that the trigger terminal is exposed to a bottom of the hole to align with the trigger portion. When a user using a finger to press the light transmitting cover with a downward pressure greater than a lower pressure threshold, the elastic body deforms and such that the trigger terminal contacts with and triggers the trigger portion. When the trigger terminal contacts with and triggers the trigger portion continuously within a trigger period, the processing element calculates a blood oxygen concentration of the user through a reflection light received by the light receiver and an emitting light emitted by the at least one light emitting device within the trigger period.

Description

blood oxygen concentration measuring device

A blood oxygen concentration measuring device, especially a push-button blood oxygen concentration measuring device.

In our daily life, when performing high-intensity mental work, the oxygen consumption of the brain can account for 20% of the oxygen uptake of the whole body. For people who work or study for a long time every day, it is necessary to strengthen the monitoring of their blood oxygen saturation at any time. In addition, high-oxygen-consuming activities such as indoor sports or gymnasiums also require special attention to blood oxygen concentration to avoid insufficient oxygen content in the blood due to exercise or excessive retraining, which may easily cause temporary hypoxia in the brain. In the design of the push-type blood oxygen concentration measuring device in the prior art, when the force of the finger pressing is too light, there is likely to be a gap between the finger and the blood oxygen concentration measuring device, resulting in light leakage, resulting in measurement errors; when the finger presses When the force is too heavy, the microvessels in the finger will be deformed, and the blood flow will be uneven or not smooth, which will also cause measurement errors. In addition, the design of the push-type blood oxygen concentration measuring device in the prior art does not have an effective mechanism to confirm that the finger is flat against the push-type blood oxygen concentration measuring device to avoid light leakage.

The technical problem to be solved by the present invention is how to design a blood oxygen concentration measuring device, which can measure when the downward pressure of the finger is appropriate, and not measure when the downward pressure is too large or too small, so as to avoid the blood oxygen concentration. measurement error.

In order to solve the aforementioned problems and achieve the expected effect, the present invention provides a blood oxygen concentration measuring device, which includes a keycap, a processing element, a key base located under the key cap, and a key base arranged on the key cap and the key base. One of the first elastic elements. The keycap includes a base plate, a casing, at least one light emitter, a light receiver and a first trigger part arranged on a lower surface of the base plate. The casing includes a light-transmitting upper cover and a side part, wherein the base plate is fixed on the side part, and an accommodating space is formed between the light-transmitting upper cover, the side part and the base plate. At least one light emitter and light receiver are arranged in the accommodating space above the substrate. At least one light transmitter and light receiver are respectively electrically connected to the processing element via a first circuit on the substrate. The first trigger part is electrically connected with the processing element through a second circuit under the substrate. The first elastic element includes a first elastic body and a first trigger piece. The first elastic body has a first upper surface, a first bottom and a first hole. The first elastic body protrudes downward from the first upper surface to the first bottom. One opening of the first hole is located on the first upper surface. The first trigger has a first trigger end and a first bottom end. Wherein the first trigger end is arranged in the first elastic body, so that the first trigger end is exposed at the bottom of one of the first holes. The first upper surface is disposed under the lower surface of the substrate, so that the first trigger end is aligned with the first trigger portion through the first hole, and there is a first gap between the first trigger end and the first trigger portion. Wherein the first bottom end is exposed from the first bottom of the first elastic body, and the first bottom end is accommodated in the key seat. When a user depresses the light-transmitting upper cover with a finger and the pressure is greater than the lower limit of a pressure threshold, the first elastic body deforms, causing the keycap to move downward, and the first trigger end contacts and triggers the first trigger part, When the first trigger end continuously touches and triggers the first trigger part during a trigger period, the processing element passes through a reflected light received by the light receiver and an emitted light emitted by at least one light emitter during the trigger period , to calculate the blood oxygen concentration of one of the users.

In practice, the aforementioned blood oxygen concentration measuring device further includes a second elastic element, and the keycap further includes a second trigger part, wherein the second trigger part is spaced apart from the first trigger part on the lower surface of the substrate, and the second trigger part is spaced from the first trigger part. The trigger part is electrically connected to the processing element via the second circuit, wherein the second elastic element and the first elastic element are spaced between the keycap and the key base, and the second elastic element includes a second elastic body and a second trigger element , the second elastic body has a second upper surface, a second bottom and a second hole, the second elastic body protrudes downward from the second upper surface to the second bottom, one opening of the second hole is located on the second upper surface On the surface, the second trigger part has a second trigger end and a second bottom end, wherein the second trigger end is arranged in the second elastic body, so that the second trigger end is exposed at the bottom of the second hole, and the second upper surface It is arranged under the lower surface of the substrate, so that the second trigger end is aligned with the second trigger part through the second hole, and there is a second gap between the second trigger end and the second trigger part, and the second gap is larger than the first gap , wherein the second bottom end is exposed from the second bottom of the second elastic body, and the second bottom end is accommodated in the key base; when the user's finger presses down on the light-transmitting upper cover during the triggering period, the pressure is greater than the lower limit of the pressure threshold and When it is less than a pressure threshold upper limit, the first trigger end continuously contacts and triggers the first trigger part during the trigger period and the second trigger end does not touch the second trigger part during the trigger period, and the processing element is received by light during the trigger period The reflected light received by the device and the emitted light emitted by at least one light emitter are used to calculate the blood oxygen concentration of the user; when the user's finger presses down on the light-transmitting upper cover during the trigger period, the pressure is greater than the upper limit of the pressure threshold , the keycap moves downward again, so that the second trigger end contacts and triggers the second trigger part, and the processing element stops calculating the blood oxygen concentration.

In practice, the first trigger end has a compressible length.

In addition, the present invention further provides a blood oxygen concentration measuring device, which includes a keycap, a processing element, a key base under the key cap, and an elastic element disposed between the key cap and the key base. The keycap includes a base plate, a casing, at least one light emitter, a light receiver, and a first trigger portion and a second trigger portion arranged on a lower surface of the base plate. The casing includes a light-transmitting upper cover and a side part, wherein the base plate is fixed on the side part, and an accommodating space is formed between the light-transmitting upper cover, the side part and the base plate. At least one light emitter and light receiver are arranged in the accommodating space above the substrate. At least one light transmitter and light receiver are respectively electrically connected to the processing element via a first circuit on the substrate. Wherein at least part of the second trigger part surrounds the first trigger part, and there is a trigger part gap between the second trigger part and the first trigger part. The first trigger part and the second trigger part are electrically connected to the processing element through a second circuit under the substrate. The elastic element includes an elastic body and a trigger piece. The elastic body has an upper surface, an elastic bottom and a hole. The elastic body protrudes downward from the upper surface to the bottom of the elastic body. One opening of the hole is located on the upper surface. The trigger has a top end and a bottom end. The top has a first trigger end and a second trigger end. The second trigger end is arranged around the first trigger end, and there is a trigger end gap between the second trigger end and the first trigger end. The top end is arranged in the elastic body, so that the first trigger end and the second trigger end are exposed at the bottom of one of the holes. The upper surface is arranged under the lower surface of the substrate, so that the first trigger end and the second trigger end are respectively aligned with the first trigger part and the second trigger part through the hole, and there is a gap between the first trigger end and the first trigger part. The first gap, there is a second gap between the second trigger end and the second trigger part, and the first gap is not equal to the second gap. Wherein the bottom end is exposed from the elastic body bottom of the elastic body, and the bottom end is accommodated in the key seat. (1) The first trigger end has a compressible length. When a user presses down the light-transmitting upper cover with a finger and the pressure is greater than the lower limit of a pressure threshold and less than the upper limit of a pressure threshold, the elastic body deforms, making the keycap downward displacement, and make the first trigger end contact and trigger the first trigger part and the second trigger end does not contact the second trigger part, when the first trigger end continues to contact and trigger the first trigger part within a trigger period and When the second trigger terminal does not touch the second trigger part during the trigger period, the processing element calculates the use of One of the blood oxygen levels, when the user presses down the light-transmitting upper cover with a finger and the pressure is greater than the upper limit of the pressure threshold during the trigger period, the keycap will move downward again, so that the second trigger end contacts and triggers the second trigger part, The processing element stops calculating the blood oxygen concentration, or (2) the second trigger end has a compressible length, when a user depresses the light-transmitting upper cover with a finger and the pressure is greater than a lower limit of a pressure threshold and less than an upper limit of a pressure threshold, The elastic body is deformed, so that the keycap is displaced downward, and the second trigger end contacts and triggers the second trigger part and the first trigger end does not contact the first trigger part. When the second trigger end continues to contact within a trigger period And when the second trigger part is triggered and the first trigger end does not touch the first trigger part during the trigger period, the processing element passes through a reflected light received by the light receiver and emitted by at least one light emitter during the trigger period One emits light to calculate the blood oxygen concentration of the user. When the user presses the light-transmitting upper cover with a finger during the trigger period, when the pressure is greater than the upper limit of the pressure threshold, the keycap will move downward again, so that the first trigger end When the first trigger part is touched and triggered, the processing element stops calculating the blood oxygen concentration, and has a compressible length.

During implementation, the blood oxygen concentration measuring device and an antenna of an electronic device are arranged in an antenna slot of the electronic device adjacent to the antenna of the electronic device, and the blood oxygen concentration measuring device detects the user through a light receiver Close to the antenna of the electronic device, so that the electronic device reduces the output power of the antenna.

During implementation, the blood oxygen concentration measuring device is a sunken button.

During implementation, wherein the light-transmitting upper cover further includes a first confirmation part and a second confirmation part, the first confirmation part and the second confirmation part are respectively located at two ends of an upper surface of the upper cover of the light-transmissive upper cover, and the first confirmation part One of the outer surfaces is one of a convex surface and a concave lower surface, one of the outer surface of the second confirmation part is one of a convex surface and a concave lower surface, the first confirmation part and the second confirmation part are It is used to confirm whether the user's finger touches the first confirmation part and the second confirmation part at the same time.

During implementation, the first confirmation part and the second confirmation part are respectively a sensor, and the first confirmation part and the second confirmation part are used to sense whether the user's fingers touch the first confirmation part and the second confirmation part respectively. part, when the user's finger does not keep touching the first confirmation part and the second confirmation part during the trigger period, the processing element stops calculating the blood oxygen concentration.

In order to further understand the present invention, the preferred embodiments are given below, and the specific composition and the achieved effects of the present invention are described in detail below in conjunction with the drawings and figure numbers.

Please refer to FIG. 1 , which is a schematic cross-sectional view of a specific embodiment of a blood oxygen concentration measuring device of the present invention. Please refer to FIG. 2 and FIG. 3 at the same time, which are schematic diagrams of the configuration above and below the substrate of the embodiment shown in FIG. 1 . A blood oxygen concentration measuring device 1 of the present invention includes a keycap 2 , a processing element 64 , a scissors structure 35 , a key base 3 and a first elastic element 4 . The keycap 2 includes a substrate 6 , a casing 20 , two red light emitters 70 , 71 , two infrared light emitters 72 , 73 , a light shield 74 , a light receiver 7 and a first trigger portion 75 . The casing 20 includes a transparent top cover 22 and a side portion 21 . The substrate 6 is fixed on the side portion 21 of the casing 20 . An accommodating space 23 is formed between the transparent upper cover 22 , the side portion 21 and the base plate 6 . The two red light emitters 70 , 71 , the two infrared light emitters 72 , 73 , the light shield 74 and the light receiver 7 are disposed in the accommodating space 23 above the substrate 6 . There is a first circuit 62 on the substrate 6 , and the two red light emitters 70 , 71 , the two infrared light emitters 72 , 73 and the light receiver 7 are respectively electrically connected to the processing element 64 via the first circuit 62 . The first trigger portion 75 is disposed on a lower surface 61 of the substrate 6 . There is a second circuit 63 under the substrate 6 , and the first trigger portion 75 is electrically connected to the processing element 64 through the second circuit 63 . In some embodiments, the first circuit 62 and the second circuit 63 can be integrated into a row of wires to be electrically connected to the processing element 64 . The key base 3 is located under the key cap 2 . The scissor foot structure 35 is respectively connected to the side part 21 and the key base 3 for stabilizing the vertical displacement of the key cap 2 . The first elastic element 4 is disposed between the keycap 2 and the key base 3 . The first elastic element 4 includes a first elastic body 40 and a first trigger 41 . The first elastic body 40 has a first upper surface 45 , a first bottom 46 and a first hole 44 . The first elastic body 40 protrudes downward from the first upper surface 45 to the first bottom 46 . An opening of the first hole 44 is located on the first upper surface 45 . The first trigger member 41 has a first trigger end 42 and a first bottom end 43, wherein the first trigger end 42 is disposed in the first elastic body 40, so that the first trigger end 42 is exposed at the bottom of the first hole 44 . The first upper surface 45 of the first elastic body 40 is arranged under the lower surface 61 of the substrate 6, so that the first hole 44 is aligned with the first trigger portion 75, so that the first trigger end 42 is aligned with the first trigger portion 42 through the first hole 44. The trigger portion 75 , and there is a first gap 47 between the first trigger end 42 and the first trigger portion 75 . The first bottom end 43 of the first trigger member 41 is exposed from the first bottom 46 of the first elastic body 40 . The key base 3 has a groove 32 for accommodating the first bottom end 43 of the first trigger member 41 . The light-transmitting upper cover 22 includes a first confirming portion 24 and a second confirming portion 25 respectively disposed on two ends of an upper surface 26 of the light-transmitting upper cover 22 . The first confirming part 24 and the second confirming part 25 can be strip-shaped or dot-shaped. The first confirmation part 24 and the second confirmation part 25 respectively have a protruding outer surface. The first confirming part 24 and the second confirming part 25 are used to assist a user to confirm whether a finger is in contact with the first confirming part 24 and the second confirming part 25 at the same time, so as to ensure the integrity of the finger pressing. The two red light emitters 70, 71 can be respectively a light-emitting diode capable of emitting a red light. The two infrared light emitters 72 and 73 can be respectively a light-emitting diode capable of emitting an infrared light. The light receiver 7 can be a photodiode. The light-transmitting upper cover 22 allows at least part of the red light emitted by the two red light emitters 70 , 71 and at least part of the infrared light emitted by the two infrared light emitters 72 , 73 to pass through. Please also refer to FIG. 4 , which is a schematic cross-sectional view of a specific embodiment in which the user presses down on FIG. 1 with his fingers. The present invention can select the elastic coefficient of the first elastic body 40 so that when a user presses down the light-transmitting upper cover 22 with a finger, the pressure is greater than the lower limit of a pressure threshold (the present invention selects the elasticity of the first elastic body 40 The coefficient can make the pressure under this moment be large enough, and it is less likely that there will be a gap between the finger and the light-transmitting upper cover 22 to cause light leakage, which can reduce the measurement error, and is suitable for measuring the pressure under the blood oxygen concentration), the first elastic body 40 is deformed, so that the keycap 2 is displaced downward, and the first trigger end 42 contacts and triggers the first trigger part 75 (for example, the first trigger part 75 is two wires, and the first trigger end 42 contacts the second trigger part 75 at the same time. two wires of a trigger part 75, and make the two wires conduct). When the first trigger terminal 42 continuously contacts and triggers the first trigger part 75 within a trigger period (for example, the first trigger terminal 42 makes the two wires of the first trigger part 75 continuously conduct), the processing element 64 passes through the trigger period A reflected light received by the light receiver 7 and a emitted light emitted by two red light emitters 70, 71 and two infrared light emitters 72, 73 respectively, calculate a ratio of reflected light and emitted light, to Calculate the blood oxygen concentration of one of the users. When calculating the blood oxygen concentration, the transmittance of the light-transmitting upper cover 22 to the red light emitted by the two red light emitters 70, 71 and the transmittance to the infrared light emitted by the two infrared light emitters 72, 73 can be calculated. Transparency is taken into consideration. During the triggering period, if the first triggering end 42 does not continue to touch and trigger the first triggering part 75, the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again, because the triggering During this period, the user does not press the light-transmitting upper cover 22 continuously and stably, which may cause errors in blood oxygen concentration measurement. During the triggering period, the user can confirm whether his fingers are in continuous contact with the first confirmation part 24 and the second confirmation part 25. If he does not touch the first confirmation part 24 and the second confirmation part 25 continuously, because If the finger is not placed in the correct position, it will affect the accuracy of blood oxygen concentration measurement and may cause errors in blood oxygen concentration measurement. In some embodiments, the first confirmation part 24 and the second confirmation part 25 are respectively a sensor for sensing whether the user's finger touches the first confirmation part 24 and the second confirmation part 25 . When the user's finger does not continuously touch the first confirmation part 24 and the second confirmation part 25 during the trigger period, the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again. If the finger is not placed in the correct position, it will affect the accuracy of blood oxygen concentration measurement and may cause errors in blood oxygen concentration measurement. In some embodiments, the first confirmation portion 24 has a concave outer surface. In some other embodiments, the second confirmation portion 25 has a concave outer surface.

Please refer to FIG. 5 , which is a schematic cross-sectional view of another embodiment of a blood oxygen concentration measuring device of the present invention. Please refer to FIG. 6 at the same time, which is a schematic diagram of the configuration under the substrate of the embodiment shown in FIG. 5 . Also refer to Figure 2. A blood oxygen concentration measuring device 1 of the present invention includes a keycap 2 , a processing element 64 , a scissors structure 35 , a key base 3 , a first elastic element 4 and a second elastic element 5 . The key cap 2 includes a substrate 6, a housing 20, two red light emitters 70, 71 (as shown in Figure 2), two infrared light emitters 72, 73, a light shielding member 74, a light receiver 7, a The first trigger part 75 and a second trigger part 76 . The casing 20 includes a transparent top cover 22 and a side portion 21 . The substrate 6 is fixed on the side portion 21 of the casing 20 . An accommodating space 23 is formed between the transparent upper cover 22 , the side portion 21 and the base plate 6 . Two red light emitters 70 , 71 , two infrared light emitters 72 , 73 , a light shield 74 and a light receiver 7 are disposed in the accommodating space 23 on the substrate 6 (as shown in FIG. 2 ). There is a first circuit 62 on the substrate 6, and two red light emitters 70, 71, two infrared light emitters 72, 73, and the light receiver 7 are electrically connected to the processing element 64 via the first circuit 62 respectively (as shown in FIG. 2 shown). The first triggering portion 75 and the second triggering portion 76 are disposed on the lower surface 61 of the substrate 6 at intervals. There is a second circuit 63 under the substrate 6 , and the first trigger part 75 and the second trigger part 76 are respectively electrically connected to the processing element 64 via the second circuit 63 . In some embodiments, the first circuit 62 and the second circuit 63 can be integrated into a row of wires to be electrically connected to the processing element 64 . The key base 3 is located under the key cap 2 . The scissor foot structure 35 is respectively connected to the side part 21 and the key base 3 for stabilizing the vertical displacement of the key cap 2 . The first elastic element 4 and the second elastic element 5 are spaced between the keycap 2 and the key base 3 . The first elastic element 4 includes a first elastic body 40 and a first trigger 41 . The first elastic body 40 has a first upper surface 45 , a first bottom 46 and a first hole 44 . The first elastic body 40 protrudes downward from the first upper surface 45 to the first bottom 46 . An opening of the first hole 44 is located on the first upper surface 45 . The first trigger member 41 has a first trigger end 42 and a first bottom end 43 . Wherein the first trigger end 42 has a compressible length. The first trigger end 42 is disposed in the first elastic body 40 such that the first trigger end 42 is exposed at a bottom of the first hole 44 . The first upper surface 45 of the first elastic body 40 is arranged under the lower surface 61 of the substrate 6, so that the first hole 44 is aligned with the first trigger portion 75, so that the first trigger end 42 is aligned with the first trigger portion 42 through the first hole 44. The trigger portion 75 , and there is a first gap 47 between the first trigger end 42 and the first trigger portion 75 . The first bottom end 43 of the first trigger member 41 is exposed from the first bottom 46 of the first elastic body 40 . The key base 3 has a first groove 30 and a second groove 31 . The first groove 30 accommodates the first bottom end 43 of the first trigger member 41 . The second elastic element 5 includes a second elastic body 50 and a second trigger 51 . The second elastic body 50 has a second upper surface 55 , a second bottom 56 and a second hole 54 . The second elastic body 50 protrudes downward from the second upper surface 55 to the second bottom 56 . An opening of the second hole 54 is located on the second upper surface 55 . The second trigger member 51 has a second trigger end 52 and a second bottom end 53, wherein the second trigger end 52 is disposed in the second elastic body 50, so that the second trigger end 52 is exposed at the bottom of the second hole 54 . The second upper surface 55 of the second elastic body 50 is arranged under the lower surface 61 of the substrate 6, so that the second hole 54 is aligned with the second trigger portion 76, so that the second trigger end 52 is aligned with the second trigger portion 52 through the second hole 54. The trigger portion 76 , and there is a second gap 57 between the second trigger end 52 and the second trigger portion 76 , wherein the second gap 57 is larger than the first gap 47 . The second bottom end 53 of the second trigger member 51 is exposed from the second bottom 56 of the second elastic body 50 . The second groove 31 of the key base 3 is used for accommodating the second bottom end 53 of the second trigger member 51 . The light-transmitting upper cover 22 includes a first confirming portion 24 and a second confirming portion 25 respectively disposed on two ends of an upper surface 26 of the light-transmitting upper cover 22 . The first confirming part 24 and the second confirming part 25 can be strip-shaped or dot-shaped. The first confirmation part 24 and the second confirmation part 25 respectively have a concave outer surface. The first confirming part 24 and the second confirming part 25 are used to assist a user to confirm whether a finger is in contact with the first confirming part 24 and the second confirming part 25 at the same time, so as to ensure the integrity of the finger pressing. The two red light emitters 70, 71 can be respectively a light-emitting diode capable of emitting a red light. The two infrared light emitters 72 and 73 can be respectively a light-emitting diode capable of emitting an infrared light. The light receiver 7 can be a photodiode. The light-transmitting upper cover 22 allows at least part of the red light emitted by the two red light emitters 70 , 71 and at least part of the infrared light emitted by the two infrared light emitters 72 , 73 to pass through. Please also refer to FIG. 7 , which is a schematic cross-sectional view of a specific embodiment in which the user presses down the finger of FIG. 5 . The present invention can respectively select the elastic coefficient of the first elastic body 40 and the elastic coefficient of the second elastic body 50 so that when a user depresses the light-transmitting upper cover 22 with a finger, the pressure is greater than a lower limit of a pressure threshold and less than When the upper limit of the pressure threshold (the present invention can make the pressure under this moment be large enough by selecting the elastic coefficient of the first elastic body 40 and the elastic coefficient of the second elastic body 50, it is less likely to have a gap between the finger and the light-transmitting upper cover 22 The gap causes light leakage, and the pressure under this time will not be too high, so that the microvascular deformation in the finger will not cause uneven or smooth blood flow, which can reduce measurement errors, and is suitable for measuring blood oxygen concentration under pressure) , the first elastic body 40 is deformed, but the second elastic body 50 has not been deformed or the deformation of the second elastic body 50 is not large, so that the keycap 2 is displaced downward, and the first trigger end 42 contacts and triggers the first trigger part 75 (for example, the first trigger part 75 is two wires, the first trigger end 42 contacts the two wires of the first trigger part 75 at the same time, and makes the two wires conduct), and at this time the second trigger end 52 The second trigger portion 76 has not been touched yet. When the first trigger terminal 42 continuously contacts and triggers the first trigger part 75 during a trigger period (for example, the first trigger terminal 42 makes the two wires of the first trigger part 75 continuously conduct), and the second trigger part 75 is triggered during the trigger period. When the terminal 52 is not in contact with the second trigger part 76, the processing element 64 is activated by a reflected light received by the light receiver 7 during the trigger period and by the two red light emitters 70, 71 and the two infrared light emitters 72, 73. The emitted light is respectively emitted, and the ratio of the reflected light to the emitted light is calculated to calculate the blood oxygen concentration of the user. When calculating the blood oxygen concentration, the transmittance of the light-transmitting upper cover 22 to the red light emitted by the two red light emitters 70, 71 and the transmittance to the infrared light emitted by the two infrared light emitters 72, 73 can be calculated. Transparency is taken into consideration. During the triggering period, if the first triggering end 42 does not continue to touch and trigger the first triggering part 75, the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again, because the triggering During this period, the user does not press the light-transmitting upper cover 22 continuously and stably, which may cause errors in blood oxygen concentration measurement. During the triggering period, the user can confirm whether his fingers are in continuous contact with the first confirmation part 24 and the second confirmation part 25. If he does not touch the first confirmation part 24 and the second confirmation part 25 continuously, because If the finger is not placed in the correct position, it will affect the accuracy of blood oxygen concentration measurement and may cause errors in blood oxygen concentration measurement. Please also refer to FIG. 8 , which is a schematic cross-sectional view of the specific embodiment of FIG. 5 that the user presses excessively with fingers. When the user's finger presses down on the light-transmitting upper cover 22 during the trigger period, the pressure is greater than the upper limit of the pressure threshold (the present invention can make the elastic coefficient of the first elastic body 40 and the elastic coefficient of the second elastic body 50 be selected at this time The lower pressure is greater than the lower pressure suitable for measuring the blood oxygen concentration, and the microvessels in the fingers are easily deformed, making the blood flow uneven or not smooth, thus causing measurement errors), the deformation of the second elastic body 50 is large enough, Make the keycap 2 move downward again (compared to FIG. 7 ), so that the second trigger end 52 contacts and triggers the second trigger part 76 (for example, the second trigger part 76 is two wires, and the second trigger end 52 simultaneously touch the two wires of the second trigger part 76 and make the two wires conduct), the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again, because when the pressure of the finger is too large, the Affect the measurement accuracy of blood oxygen concentration. In some embodiments, the first confirmation part 24 and the second confirmation part 25 are respectively a sensor for sensing whether the user's finger touches the first confirmation part 24 and the second confirmation part 25 . When the user's finger does not continuously touch the first confirmation part 24 and the second confirmation part 25 during the trigger period, the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again. If the finger is not placed in the correct position, it will affect the accuracy of blood oxygen concentration measurement and may cause errors in blood oxygen concentration measurement. In some embodiments, the first confirmation portion 24 has a convex outer surface. In other embodiments, the second confirmation portion 25 has a protruding outer surface.

Please refer to FIG. 9 , which is a schematic cross-sectional view of another embodiment of a blood oxygen concentration measuring device of the present invention. Please also refer to FIG. 10 , which is a schematic diagram of the configuration under the substrate of the embodiment shown in FIG. 9 . Also refer to Figure 2. A blood oxygen concentration measuring device 1 of the present invention includes a keycap 2 , a processing element 64 , a scissors structure 35 , a key base 3 and an elastic element 8 . The key cap 2 includes a substrate 6, a housing 20, two red light emitters 70, 71 (as shown in Figure 2), two infrared light emitters 72, 73, a light shielding member 74, a light receiver 7, a The first trigger part 75 and a second trigger part 76 . The casing 20 includes a transparent top cover 22 and a side portion 21 . The substrate 6 is fixed on the side portion 21 of the casing 20 . An accommodating space 23 is formed between the transparent upper cover 22 , the side portion 21 and the base plate 6 . Two red light emitters 70 , 71 , two infrared light emitters 72 , 73 , a light shield 74 and a light receiver 7 are disposed in the accommodating space 23 on the substrate 6 (as shown in FIG. 2 ). There is a first circuit 62 on the substrate 6, and two red light emitters 70, 71, two infrared light emitters 72, 73, and the light receiver 7 are electrically connected to the processing element 64 via the first circuit 62 respectively (as shown in FIG. 2 shown). The first triggering portion 75 and the second triggering portion 76 are respectively disposed on a lower surface 61 of the substrate 6 , wherein at least part of the second triggering portion 76 surrounds the first triggering portion 75 , and the connection between the second triggering portion 76 and the first triggering portion 75 There is a trigger gap 77 between them. There is a second circuit 63 under the substrate 6 , and the first trigger part 75 and the second trigger part 76 are respectively electrically connected to the processing element 64 via the second circuit 63 . In some embodiments, the first circuit 62 and the second circuit 63 can be integrated into a row of wires to be electrically connected to the processing element 64 . The key base 3 is located under the key cap 2 . The scissor foot structure 35 is respectively connected to the side part 21 and the key base 3 for stabilizing the vertical displacement of the key cap 2 . The elastic element 8 is disposed between the keycap 2 and the key base 3 . The elastic element 8 includes an elastic body 80 and a trigger 81 . The elastic body 80 has an upper surface 85 , an elastic body bottom 86 and a hole 84 . The elastic body 80 protrudes downward from the upper surface 85 to the bottom 86 of the elastic body. One opening of the hole 84 is located on the upper surface 85 . The trigger member 81 has a top end 82 and a bottom end 83 . The top 82 has a first trigger end 87 and a second trigger end 88, the second trigger end 88 is arranged around the first trigger end 87, and there is a trigger end gap between the second trigger end 88 and the first trigger end 87 89, wherein the first trigger end 87 has a compressible length. The top end 82 is disposed in the elastic body 80 such that the first trigger end 87 and the second trigger end 88 are exposed at a bottom of the hole 84 . The upper surface 85 of the elastic body 80 is disposed under the lower surface 61 of the substrate 6, so that the hole 84 is aligned with the first triggering portion 75 and the second triggering portion 76, so that the first triggering end 87 and the second triggering end 88 pass through the hole 84 respectively aligning the first triggering portion 75 and the second triggering portion 76 (the triggering end gap 89 corresponds to the triggering portion gap 77 ), and there is a first gap 870 between the first triggering end 87 and the first triggering portion 75 , There is a second gap 880 between the second trigger end 88 and the second trigger portion 76, wherein the first gap 870 is smaller than the second gap 880 (that is, a length of the first trigger end 87 is greater than one of the second trigger end 88 length). The bottom end 83 of the trigger member 81 is exposed from the elastic body bottom 86 of the elastic body 80 . The key base 3 has a groove 32 . The groove 32 accommodates the bottom end 83 of the trigger member 81 . The light-transmitting upper cover 22 includes a first confirming portion 24 and a second confirming portion 25 respectively disposed on two ends of an upper surface 26 of the light-transmitting upper cover 22 . The first confirming part 24 and the second confirming part 25 can be strip-shaped or dot-shaped. The first confirmation part 24 and the second confirmation part 25 respectively have a protruding outer surface. The first confirming part 24 and the second confirming part 25 are used to assist a user to confirm whether a finger is in contact with the first confirming part 24 and the second confirming part 25 at the same time, so as to ensure the integrity of the finger pressing. The two red light emitters 70, 71 can be respectively a light-emitting diode capable of emitting a red light. The two infrared light emitters 72 and 73 can be respectively a light-emitting diode capable of emitting an infrared light. The light receiver 7 can be a photodiode. The light-transmitting upper cover 22 allows at least part of the red light emitted by the two red light emitters 70 , 71 and at least part of the infrared light emitted by the two infrared light emitters 72 , 73 to pass through. Please also refer to FIG. 11 , which is a schematic cross-sectional view of the embodiment shown in FIG. 9 when the user presses down with his finger. In the present invention, by selecting the elastic coefficient of the elastic body 80, when a user presses down the light-transmitting upper cover 22 with a finger, the pressure is greater than a lower limit of a pressure threshold and smaller than an upper limit of a pressure threshold (the present invention selects the elastic coefficient of the elastic body 80 The coefficient of elasticity can make the pressure under this moment be large enough, and it is less likely that there will be a gap between the finger and the light-transmitting upper cover 22 to cause light leakage, and the pressure under this moment will not be too large, so that the microvascular deformation in the finger will not cause blood The flow is uneven or not smooth, which can reduce the measurement error. In order to be suitable for measuring the blood oxygen concentration under pressure), the elastic body 80 is deformed, so that the keycap 2 is displaced downward, and the first trigger end 87 is contacted and triggered The first trigger part 75 (for example, the first trigger part 75 is two wires, the first trigger end 87 contacts the two wires of the first trigger part 75 at the same time, and makes the two wires conduct), and at this time the second The trigger end 88 does not contact the second trigger portion 76 . When the first trigger terminal 87 continuously contacts and triggers the first trigger part 75 during a trigger period (for example, the first trigger terminal 87 makes the two wires of the first trigger part 75 continuously conduct), and the second trigger part 75 is triggered during the trigger period. When the end 88 does not touch the second trigger part 76, the processing element 64 passes through a reflected light received by the light receiver 7 during the trigger period and is transmitted by the two red light emitters 70, 71 and the two infrared light emitters 72, 73. The emitted light is respectively emitted, and the ratio of the reflected light to the emitted light is calculated to calculate the blood oxygen concentration of the user. When calculating the blood oxygen concentration, the transmittance of the light-transmitting upper cover 22 to the red light emitted by the two red light emitters 70, 71 and the transmittance to the infrared light emitted by the two infrared light emitters 72, 73 can be calculated. Transparency is taken into consideration. During the triggering period, if the first triggering end 87 does not continue to touch and trigger the first triggering part 75, the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again, because the triggering During this period, the user does not press the light-transmitting upper cover 22 continuously and stably, which may cause errors in blood oxygen concentration measurement. During the triggering period, the user can confirm whether his fingers are in continuous contact with the first confirmation part 24 and the second confirmation part 25. If he does not touch the first confirmation part 24 and the second confirmation part 25 continuously, because If the finger is not placed in the correct position, it will affect the accuracy of blood oxygen concentration measurement and may cause errors in blood oxygen concentration measurement. Please also refer to FIG. 12 , which is a schematic cross-sectional view of the specific embodiment of FIG. 9 that the user presses down excessively with fingers. When the user's finger presses down on the light-transmitting upper cover 22 during the trigger period, the pressure is greater than the upper limit of the pressure threshold (the present invention can make the pressure under the pressure greater than the one suitable for measuring the blood oxygen concentration by selecting the elastic coefficient of the elastic body 80. Under pressure, the microvessels in the fingers are easily deformed, making the blood flow uneven or not smooth, thus causing measurement errors), at this time, the length of the first trigger end 87 is slightly shortened due to compression, and the keycap 2 is then downward. Displacement (compared to FIG. 11 ), so that the second trigger end 88 contacts and triggers the second trigger part 76 (for example, the second trigger part 76 is two wires, and the second trigger end 88 contacts the second trigger part 76 at the same time two wires, and make the two wires conduction), the processing unit 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again, because when the pressure of the finger is too large, the amount of blood oxygen concentration will be affected The accuracy of the measurement may cause errors in the measurement of blood oxygen concentration. In some embodiments, the first confirmation part 24 and the second confirmation part 25 are respectively a sensor for sensing whether the user's finger touches the first confirmation part 24 and the second confirmation part 25 . When the user's finger does not continuously touch the first confirmation part 24 and the second confirmation part 25 during the trigger period, the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again. If the finger is not placed in the correct position, it will affect the accuracy of blood oxygen concentration measurement and may cause errors in blood oxygen concentration measurement. In some embodiments, the first confirmation portion 24 has a concave outer surface. In some other embodiments, the second confirmation portion 25 has a concave outer surface.

In another embodiment (not shown in the figure), the main structure of the blood oxygen concentration measuring device 1 of the present invention is substantially the same as that of the specific embodiment in Fig. 9 and Fig. 10, except that the first gap 870 is larger than The second gap 880 (that is, the length of the first trigger end 87 is smaller than the length of the second trigger end 88 ), and the second trigger end 88 has a compressible length. When the user presses down the light-transmitting upper cover 22 with his fingers, the pressure is greater than the lower limit of the pressure threshold and less than the upper limit of the pressure threshold (the present invention can make the pressure under this moment large enough by selecting the elastic coefficient of the elastic body 80, and the finger and the transparent It is less likely that there will be gaps between the upper cover 22 to cause light leakage, and the pressure under the pressure will not be too high at this time, so as not to deform the capillaries in the fingers and cause blood flow to be uneven or unsmooth, which can reduce measurement errors and be an appropriate amount. measure blood oxygen concentration), the elastic body 80 deforms, causing the keycap 2 to displace downward, and makes the second trigger end 88 contact and trigger the second trigger part 76, and at this time the first trigger end 87 is not in contact with The first trigger part 75 . When the second trigger end 88 continuously touches and triggers the second trigger portion 76 during a trigger period, and the first trigger end 87 does not touch the first trigger portion 75 during the trigger period, the processing element 64 is activated by The reflected light received by the light receiver 7 and the emitted light respectively emitted by the two red light emitters 70, 71 and the two infrared light emitters 72, 73 calculate the ratio of the reflected light to the emitted light to calculate the user's blood oxygen concentration. When the user's finger presses down on the light-transmitting upper cover 22 during the trigger period, the pressure is greater than the upper limit of the pressure threshold (the present invention can make the pressure under the pressure greater than the one suitable for measuring the blood oxygen concentration by selecting the elastic coefficient of the elastic body 80. Under pressure, the microvessels in the fingers are easily deformed, making the blood flow uneven or not smooth, thus causing measurement errors), at this time, the length of the second trigger end 88 is slightly shortened due to compression, and the keycap 2 is then downward. Displacement, so that the first trigger end 87 contacts and triggers the first trigger part 75, and the processing element 64 stops calculating the blood oxygen concentration of the user, and the user must perform the measurement again, because when the pressure of the finger is too large, it will affect the blood oxygen concentration. The accuracy of oxygen concentration measurement.

Please refer to FIG. 13 , which is a three-dimensional schematic diagram of an installation position of a specific embodiment of a blood oxygen concentration measuring device according to the present invention. Please also refer to FIG. 14 , which is a schematic cross-sectional view of the embodiment shown in FIG. 13 . The structure of the blood oxygen concentration measuring device 1 in the embodiment of Fig. 13 and Fig. 14 is exactly the same as that of the blood oxygen concentration measuring device 1 in the embodiment of Fig. 5 and Fig. 6 . In the embodiment of FIG. 13 , an antenna 12 of an electronic device 10 (for example, a notebook computer) is disposed in an elongated antenna slot 11 of the electronic device 10 . The blood oxygen concentration measuring device 1 of the present invention is disposed in the antenna slot 11 adjacent to the antenna 12 . In this embodiment, the blood oxygen concentration measuring device 1 is designed as a sunken button. In addition to measuring the blood oxygen concentration of the user, the blood oxygen concentration measuring device 1 of the present invention can emit two infrared lights when the user (or the user's finger) approaches the antenna 12 of the electronic device 10. Devices 72, 73 respectively emit an infrared light (or an infrared light is emitted by one of the two infrared light emitters 72, 73), and then received by the light receiver 7 of the blood oxygen concentration measuring device 1 of the present invention A change in reflected light, whereby it can be detected that the user is close to the blood oxygen concentration measuring device 1 (that is, approaching the antenna 12 of the electronic device 10 adjacent to the blood oxygen concentration measuring device 1), so that the electronic device 10 lowers the antenna The output power of 12 is to meet the requirements of the safety regulations of electromagnetic wave energy specific absorption rate (SAR: Specific Absorption Rate). This can avoid the problem that when the user approaches the antenna 12 of the electronic device 10 , the output power of the antenna 12 is too high and the health of the user is affected. Since the two infrared light emitters 72, 73 emit infrared light, it is possible to detect whether the user (or the user's finger) is close to the antenna 12 of the electronic device 10 at all times without affecting the user's line of sight. . This design not only saves space, but also does not need to open another slot for installing the blood oxygen concentration measuring device 1 of the present invention, which can save costs (the cost of slotting the metal shell is quite high), and the blood oxygen concentration of the present invention The detection device 1 can also be used as a user approaching detector, which can reduce the need for another human body approaching detector. In some embodiments, the electronic device 10 can also be a tablet computer. In some embodiments, the structure of the blood oxygen concentration measuring device 1 in the embodiment shown in FIG. 13 and FIG. 14 is exactly the same as that in the embodiment shown in FIG. 1 , FIG. 2 and FIG. 3 . In some other embodiments, the structure of the blood oxygen concentration measuring device 1 in the embodiment shown in Fig. 13 and Fig. 14 is exactly the same as that of the blood oxygen concentration measuring device 1 in the embodiment shown in Fig. 9 and Fig. 10 .

Please refer to FIG. 15 , which is a three-dimensional schematic diagram of another installation position of a specific embodiment of a blood oxygen concentration measuring device according to the present invention. The main structure of the embodiment of FIG. 15 is substantially the same as that of the embodiment of FIG. 13 , except that the antenna slot 11 of the electronic device 10 is an L-shaped antenna slot.

Please refer to FIG. 16 , which is a three-dimensional schematic diagram of the installation position of a specific embodiment of a blood oxygen concentration measuring device according to the present invention. In the embodiment of Fig. 16, the blood oxygen concentration measuring device 1, the blood oxygen concentration measuring device 1', the blood oxygen concentration measuring device 1'' and the blood oxygen concentration measuring device 1''' are all blood of the present invention. Oxygen concentration measuring device. In the embodiment of Fig. 16 , the blood oxygen concentration measuring device 1, the blood oxygen concentration measuring device 1', the blood oxygen concentration measuring device 1'' and the blood oxygen concentration measuring device 1'' of the present invention are shown. possible setting position. Wherein the blood oxygen concentration measuring device 1''' of the present invention is combined with a key in the keyboard of the electronic device 10 (such as a shift key or a control key). The user of the electronic device 10 can measure his own blood oxygen concentration with the blood oxygen concentration measuring device of the present invention at any time.

Please refer to FIG. 17 , which is a three-dimensional schematic diagram of another installation position of a specific embodiment of a blood oxygen concentration measuring device according to the present invention. In the embodiment of FIG. 17, the blood oxygen concentration measuring device 1 of the present invention is arranged on a control panel 13 of a treadmill. Users of the treadmill can measure their own blood oxygen concentration at any time with the blood oxygen concentration measuring device 1 of the present invention.

1: blood oxygen concentration measuring device 1': blood oxygen concentration measuring device 1'': blood oxygen concentration measuring device 1''': blood oxygen concentration measuring device 10: Electronic device 11: Antenna slot 12: Antenna 13: Control panel 2: Keycap 20: shell 21: side 22: Light-transmitting upper cover 23:Accommodating space 24: First Confirmation Department 25:Second Confirmation Department 26: The upper surface of the upper cover 3:Keyboard 30: the first groove 31: Second groove 32: Groove 35: Scissor foot structure 4: The first elastic element 40: first elastomer 41: The first trigger 42: The first trigger terminal 43: First Bottom 44: The first hole 45: First upper surface 46: First Bottom 47: First gap 5: Second elastic element 50:Second elastic body 51: The second trigger 52: The second trigger terminal 53: Second Bottom 54: Second Hole 55: second upper surface 56: Second Bottom 57:Second gap 6: Substrate 61: lower surface 62: The first circuit 63: The second circuit 64: Processing elements 7: Optical receiver 70: Red light emitter 71: Red light emitter 72:Infrared light emitter 73:Infrared light emitter 74: light shield 75: The first trigger department 76: The second trigger part 77: trigger gap 8: elastic element 80:Elastomer 81: Trigger 82: top 83: Bottom 84: hole 85: upper surface 86: Elastomer bottom 87: The first trigger terminal 870: First gap 88: The second trigger terminal 880: second gap 89: Trigger end clearance

[Fig. 1] is a schematic cross-sectional view of a specific embodiment of a blood oxygen concentration measuring device of the present invention. [FIG. 2] is a schematic diagram of the configuration on the substrate of the embodiment shown in FIG. 1. [FIG. 3] is a schematic diagram of the configuration under the substrate of the specific embodiment in FIG. 1. [Fig. 4] is a schematic cross-sectional view of a specific embodiment in which the user presses down on Fig. 1 with his finger. [ FIG. 5 ] is a schematic cross-sectional view of another embodiment of a blood oxygen concentration measuring device of the present invention. [FIG. 6] is a schematic diagram of the configuration under the substrate of the embodiment shown in FIG. 5. [Fig. 7] is a schematic cross-sectional view of a specific embodiment in which the user presses down Fig. 5 with his finger. [Fig. 8] is a schematic cross-sectional view of the specific embodiment of Fig. 5, which is excessively pressed by the user's fingers. [ Fig. 9 ] is a schematic cross-sectional view of another embodiment of a blood oxygen concentration measuring device of the present invention. [FIG. 10] is a schematic diagram of the configuration under the substrate of the embodiment shown in FIG. 9. [Fig. 11] is a schematic cross-sectional view of the specific embodiment in which the user presses down the finger in Fig. 9 . [Fig. 12] is a schematic cross-sectional view of the embodiment shown in Fig. 9 when the user presses down excessively with his fingers. [ FIG. 13 ] is a three-dimensional schematic diagram of an installation position of a specific embodiment of a blood oxygen concentration measuring device according to the present invention. [Fig. 14] is a schematic cross-sectional view of the embodiment shown in Fig. 13. [Fig. 15] is a three-dimensional schematic diagram of another installation position of a specific embodiment of a blood oxygen concentration measuring device according to the present invention. [Fig. 16] is a three-dimensional schematic diagram of the installation position of a specific embodiment of a blood oxygen concentration measuring device according to the present invention. [ Fig. 17 ] is a three-dimensional schematic diagram of another installation position of a specific embodiment of a blood oxygen concentration measuring device of the present invention.

1: blood oxygen concentration measuring device 2: Keycap 20: Housing 21: Side 22: Transparent top cover 23: Storage space 24: First Confirmation Department 25: Second Confirmation Department 26: Top cover surface 3: Keypad 32: Groove 35: Scissor foot structure 4: First elastic element 40: Primary elastomer 41: First Trigger 42: First trigger terminal 43: First Bottom 44: First Hole 45: first upper surface 46: First Bottom 47: First Clearance 6: Substrate 61: lower surface 7: Optical Receiver 72: Infrared light emitter 73: Infrared light emitter 74: Light shield 75: First trigger unit

Claims (10)

A device for measuring blood oxygen concentration, comprising: a keycap, including: a substrate, which has a first circuit and a second circuit; a housing, which includes a light-transmitting upper cover and a side portion, wherein the substrate is fixed On the side part, an accommodating space is formed between the light-transmitting upper cover, the side part and the substrate; at least one light emitter is arranged in the accommodating space on the substrate; a light receiver is arranged in the accommodating space In the accommodating space above the substrate; and a first trigger part, disposed on a lower surface of the substrate; a processing element, wherein the at least one light emitter and the light receiver communicate with the processing element respectively via the first circuit Electrically connected, the first trigger part is electrically connected to the processing element through the second circuit; a key base is located under the key cap; and a first elastic element is arranged between the key cap and the key base Between, wherein the first elastic element includes a first elastic body and a first trigger, the first elastic body has a first upper surface, a first bottom and a first hole, the first elastic body from the The first upper surface protrudes downward to the first bottom, an opening of the first hole is located on the first upper surface, the first trigger has a first trigger end and a first bottom end, wherein the first The trigger end is arranged in the first elastic body, so that the first trigger end is exposed at the bottom of the first hole, and the first upper surface is arranged under the lower surface of the substrate, so that the first trigger end passes through The first hole is aligned with the first trigger part, and there is a first gap between the first trigger end and the first trigger part, wherein the first bottom end is exposed from the first bottom of the first elastic body , and the first bottom end is accommodated in the key base; when a user depresses the light-transmitting upper cover with a finger, the pressure is greater than the lower limit of a pressure threshold, so that the finger and the light-transmitting upper cover are not easily separated. There is a gap to cause light leakage, and the first elastic body is deformed, so that the keycap is displaced downward, and the first trigger end contacts and triggers the first trigger part, when the first trigger end is within a trigger period When continuously touching and triggering the first trigger part, the processing element calculates the usage through a reflected light received by the light receiver and an emitted light emitted by the at least one light emitter during the triggering period. One of the blood oxygen concentration. The blood oxygen concentration measuring device as described in Claim 1, wherein the blood oxygen concentration measuring device and an antenna of an electronic device are arranged in an antenna slot of the electronic device adjacent to the antenna of the electronic device, the The blood oxygen concentration measuring device detects that the user approaches the antenna of the electronic device through the light receiver, so that the electronic device reduces an output power of the antenna. The blood oxygen concentration measuring device as described in Claim 1 further includes a second elastic element, and the keycap further includes a second trigger part, wherein the second trigger part is spaced apart from the first trigger part The lower surface of the substrate, the second trigger part is electrically connected to the processing element via the second circuit, wherein the second elastic element and the first elastic element are spaced between the keycap and the key base, The second elastic element includes a second elastic body and a second trigger, the second elastic body has a second upper surface, a second bottom and a second hole, the second elastic body The surface protrudes downward to the second bottom, an opening of the second hole is located on the second upper surface, the second trigger has a second trigger end and a second bottom end, wherein the second trigger end is set In the second elastic body, the second trigger end is exposed at the bottom of the second hole, and the second upper surface is arranged under the lower surface of the substrate, so that the second trigger end passes through the second The hole is aligned with the second triggering portion, and there is a second gap between the second triggering end and the second triggering portion, the second gap is larger than the first gap, and the second bottom end is formed from the second elastic The second bottom of the body is exposed, and the second bottom end is accommodated in the key base; when the finger of the user presses down the light-transmitting upper cover during the trigger period, the pressing force is greater than When the lower limit of the pressure threshold is less than an upper limit of the pressure threshold, the first trigger end continues to contact and trigger the first trigger portion during the trigger period, and the second trigger end does not contact the second trigger portion during the trigger period. , the processing element calculates the blood oxygen concentration of the user through the reflected light received by the light receiver and the emitted light emitted by the at least one light transmitter during the triggering period; During the triggering period, when the pressing force of the user's finger on the light-transmitting upper cover is greater than the upper limit of the pressure threshold, the keycap is then displaced downwards, so that the second triggering end contacts and triggers the second triggering part, the The processing element stops calculating the blood oxygen concentration. The blood oxygen concentration measuring device as described in claim 3, wherein the blood oxygen concentration measuring device and an antenna of an electronic device are arranged in an antenna slot of the electronic device adjacent to the antenna of the electronic device, the The blood oxygen concentration measuring device detects that the user approaches the antenna of the electronic device through the light receiver, so that the electronic device reduces an output power of the antenna. The blood oxygen concentration measuring device according to claim 3, wherein the first trigger end has a compressible length. A device for measuring blood oxygen concentration, comprising: a keycap, including: a substrate, which has a first circuit and a second circuit; a housing, which includes a light-transmitting upper cover and a side portion, wherein the substrate is fixed On the side part, an accommodating space is formed between the light-transmitting upper cover, the side part and the substrate; at least one light emitter is arranged in the accommodating space on the substrate; a light receiver is arranged in the accommodating space In the accommodating space above the substrate; a first triggering part is arranged on a lower surface of the substrate; and a second trigger part, disposed on the lower surface of the substrate, wherein at least part of the second trigger part surrounds the first trigger part, and there is a trigger part gap between the second trigger part and the first trigger part ; a processing element, wherein the at least one optical transmitter and the optical receiver are respectively electrically connected to the processing element via the first circuit, the first trigger part and the second trigger part are respectively connected to the second circuit via the second circuit The processing element is electrically connected; a key base is located under the key cap; and an elastic element is arranged between the key cap and the key base, wherein the elastic element includes an elastic body and a trigger piece, and the elastic body It has an upper surface, an elastic body bottom and a hole, the elastic body protrudes downward from the upper surface to the elastic body bottom, an opening of the hole is located on the upper surface, the trigger has a top end and a bottom end , the top has a first trigger end and a second trigger end, the second trigger end is arranged around the first trigger end, and there is a trigger end gap between the second trigger end and the first trigger end, The top end is arranged in the elastic body, so that the first trigger end and the second trigger end are exposed at the bottom of the hole, and the upper surface is arranged under the lower surface of the substrate, so that the first trigger end and the second trigger end are exposed at the bottom of the hole. The second trigger end is respectively aligned with the first trigger part and the second trigger part through the hole, and there is a first gap between the first trigger end and the first trigger part, and the second trigger end and the second trigger part There is a second gap between the second trigger parts, the first gap is not equal to the second gap, wherein the bottom end is exposed from the elastic body bottom of the elastic body, and the bottom end is accommodated in the key base; wherein , the first trigger end has a compressible length, and when a user presses down the light-transmitting upper cover with a finger, the pressure is greater than a lower limit of a pressure threshold and less than an upper limit of a pressure threshold, so that the finger and the light-transmitting upper cover It is not easy to have gaps between them to cause light leakage, and to deform the elastic body, so that the The keycap is displaced downward so that the first trigger end contacts and triggers the first trigger portion and the second trigger end does not contact the second trigger portion, when the first trigger end continues to contact and trigger within a trigger period When the first triggering part is triggered and the second triggering end does not touch the second triggering part during the triggering period, the processing element passes through a reflected light received by the light receiver during the triggering period and by the The emitted light emitted by at least one light emitter is used to calculate the blood oxygen concentration of the user, and when the user presses down the light-transmitting upper cover with the finger during the trigger period, the pressure is greater than the pressure threshold upper limit , the keycap moves downward again, so that the second trigger end contacts and triggers the second trigger part, and the processing element stops calculating the blood oxygen concentration; or the second trigger end has a compressible length, when a When the user presses down the light-transmitting upper cover with a finger, when the pressure is greater than the lower limit of a pressure threshold and less than the upper limit of a pressure threshold, there is no gap between the finger and the light-transmitting upper cover to cause light leakage, and the elastic body is deformed. The keycap is displaced downward, and the second trigger end contacts and triggers the second trigger portion and the first trigger end does not contact the first trigger portion, when the second trigger end lasts within a trigger period When contacting and triggering the second triggering part and the first triggering end is not in contact with the first triggering part during the triggering period, the processing element passes through a reflected light received by the light receiver during the triggering period and The emitted light emitted by the at least one light emitter is used to calculate the blood oxygen concentration of the user, and when the user presses down the light-transmitting upper cover with the finger during the trigger period, the pressing force is greater than the pressure When the upper limit of the threshold is reached, the keycap is displaced downwards, so that the first trigger end touches and triggers the first trigger part, and the processing element stops calculating the blood oxygen concentration. The blood oxygen concentration measuring device as described in Claim 6, wherein the blood oxygen concentration measuring device and an antenna of an electronic device are arranged in an antenna slot of the electronic device adjacent to the electronic device The antenna, the blood oxygen concentration measuring device detects the user approaching the antenna of the electronic device through the light receiver, so that the electronic device reduces an output power of the antenna. The blood oxygen concentration measuring device according to any one of claim 1 to claim 7, wherein the blood oxygen concentration measuring device is a sink button. The blood oxygen concentration measuring device according to any one of claim 1 to claim 7, wherein the transparent upper cover further includes a first confirmation part and a second confirmation part, the first confirmation part and the second confirmation part The confirming parts are respectively located at the two ends of the upper surface of the upper cover of the light-transmitting cover. One of the outer surfaces of the first confirming part is one of a convex surface and a concave lower surface. It is one of a convex surface and a concave surface, and the first confirmation part and the second confirmation part are used to confirm whether the user's finger touches the first confirmation part and the second confirmation part at the same time . The blood oxygen concentration measuring device as described in Claim 9, wherein the first confirmation part and the second confirmation part are respectively a sensor, and the first confirmation part and the second confirmation part are respectively used to sense the Whether the user's finger touches the first confirmation part and the second confirmation part, when the user's finger does not continuously touch the first confirmation part and the second confirmation part during the trigger period, the The processing element stops calculating the blood oxygen concentration.

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