Monitoring device based on optical signal

Abstract

A monitoring device based on optical signals comprises a first shell assembly, a circuit board assembly, a light emitting source, a second shell assembly and an optical sensor. The first housing assembly has a first accommodation space and a light guide portion. The circuit board assembly comprises a first circuit board, a flexible connecting part and a second circuit board which are connected in sequence; the first circuit board is arranged in the first accommodating space; the light-emitting light source is arranged in the first containing space and fixed to the first circuit board. The light-emitting light source is arranged opposite to the light guiding part and emits a light signal towards the target object through the light guiding part. The second shell assembly is movably connected to the first shell assembly. The second shell assembly is provided with a second containing space and a light receiving part. The second circuit board is arranged in the second containing space, and at least part of the flexible connecting part is located outside the first shell assembly and the second shell assembly. The light sensor is arranged in the second containing space and fixed to the second circuit board. And the light sensor receives the light signal passing through the target object through the light receiving part.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of human body monitoring, in particular to a monitoring device based on light signals. BACKGROUND

[0002] With the development of microelectronic technology, wearable monitoring devices are widely used in monitoring physiological information of a subject, so as to determine the physical condition of the subject. For example, in the related art, a cerebral oximetry probe can be worn on the forehead of a subject, and a light source emits near-infrared light, which is received by an optical sensor after being irradiated through the skull of the head, thereby realizing the monitoring of the cerebral oxygen saturation of the subject.

[0003] However, if the light source or the optical sensor does not match the shape of the subject's head well, it will affect the emission or reception of the near-infrared light signal, thereby affecting the measurement accuracy of such monitoring devices. CONTENT OF THE INVENTION

[0004] In view of the above, it is necessary to provide a monitoring device based on light signals.

[0005] The present application provides a monitoring device based on light signals, comprising a first housing assembly, a circuit board assembly, a light source, a second housing assembly and a light sensor. The first housing assembly has a first accommodating space and a light guiding portion in optical communication with the first accommodating space. The circuit board assembly comprises a first circuit board, a flexible connecting portion and a second circuit board connected in sequence, and the first circuit board is arranged in the first accommodating space. The light source is arranged in the first accommodating space and fixed to the first circuit board. The light source is arranged opposite to the light guiding portion and is configured to emit light signals towards a target object through the light guiding portion. The second housing assembly is movably connected to the first housing assembly, and the second housing assembly has a second accommodating space and a light receiving portion in optical communication with the second accommodating space. The second circuit board is arranged in the second accommodating space, and at least part of the flexible connecting portion is located outside the first housing assembly and the second housing assembly. The light sensor is arranged in the second accommodating space and fixed to the second circuit board. The light sensor is arranged opposite to the light receiving portion and is configured to receive light signals after passing through the target object through the light receiving portion.

[0006] In some possible implementations, the flexible connecting portion is fixedly connected to the first circuit board and / or the second circuit board by welding.

[0007] In some possible implementations, the flexible connecting portion is fixedly connected to the first circuit board and / or the second circuit board by welding.

[0008] In some possible implementations, the light source is a dual-wavelength light source.

[0009] In some possible implementations, there are two light sensors, with the light source and the two light sensors arranged sequentially along a first direction, which is the connection direction between the first housing assembly and the second housing assembly.

[0010] In some possible implementations, along the first direction, the center distance between the light source and a photosensor located adjacent to the light source is 2 cm to 3 cm, and the center distance between the two photosensors is 5-20 mm.

[0011] In some possible implementations, the light-signal-based monitoring device also includes a chip and a display screen disposed within a second receiving space. The chip is configured to determine human physiological information based on light signals received by a light sensor. The display screen is configured to display the human physiological information.

[0012] In some possible implementations, the optical signal-based monitoring device also includes a resilient fastener. The two ends of the resilient fastener are respectively fixed to the first housing assembly and the second housing assembly.

[0013] In some possible implementations, the flexible connector is a cable.

[0014] In some possible implementations, the light signal-based monitoring device is a cerebral oxygenation monitoring device, where the light signal is a near-infrared light signal and is configured to determine cerebral oxygenation saturation information.

[0015] In some possible implementations, the first housing assembly and the second housing assembly are pivotally connected or hinged.

[0016] In this application, when the first housing assembly and the second housing assembly move relative to each other to better fit the subject's head, the angle between the first circuit board and the second circuit board can also be adjusted accordingly by the flexible connection, so that the light source and the light sensor are more adapted to the shape of the head, improving the transmission and reception quality of the light signal, thereby improving the measurement accuracy of the monitoring device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a monitoring device based on optical signals provided in one embodiment of this application.

[0018] Figure 2 for Figure 1 The diagram shows the structure of the monitoring device after the straps have been removed.

[0019] Figure 3 for Figure 2 The monitoring device shown is a cross-sectional view along section line AA.

[0020] Figure 4 for Figure 1 An exploded view of the monitoring device shown.

[0021] Figure 5 For Figure 3 Structure diagram of the circuit board assembly, the light emitting source and the light sensor of the monitoring device. DETAILED DESCRIPTION

[0022] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as a limitation of the present application.

[0023] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0024] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless specifically defined otherwise, a first feature "on" or "under" a second feature can include the first and second features being directly in contact with each other, or the first and second features not being directly in contact with each other but being in contact with each other through another feature between them. In addition, the first feature "on", "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or only indicating that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes the first feature being directly above and obliquely above the second feature, or only indicating that the first feature is lower in horizontal height than the second feature.

[0026] Referring to Figure 1 and Figure 2 , an embodiment of the present application provides a light signal based monitoring device 1 which can be used to monitor physiological information of a subject, such as cerebral oxygen saturation, blood pressure, heart rate, etc. In some embodiments, the monitoring device 1 is used to monitor cerebral oxygen saturation of a subject, i.e. the monitoring device 1 is a cerebral oximetry device 1.

[0027] The monitoring device 1 can be worn on the head of a subject to be monitored. As shown in Figure 3 , the monitoring device 1 comprises a light emitting source 10 and a light sensor 20. The light emitting source 10 emits near-infrared light, when the near-infrared light irradiates through the skull, the photons disperse along multiple paths in the intracranial, a part of the light is absorbed by different layers of tissue such as the skull, the scalp, and the brain, and the remaining photons are scattered in the brain tissue and received by the light sensor 20, thereby realizing the monitoring of the cerebral oxygen saturation of the subject to be monitored.

[0028] As shown in Figures 2 to 4 , the monitoring device 1 further comprises a first housing assembly 30, a second housing assembly 40 and a circuit board assembly 50. The first housing assembly 30 can comprise a first housing 31 and a second housing 32 fixed to the first housing 31, and the first housing 31 and the second housing 32 enclose and define a first accommodating space 300. The second housing assembly 40 is movably connected to one end of the first housing assembly 30. The second housing assembly 40 can comprise a third housing 41 and a fourth housing 42 fixed to the third housing 41, and the third housing 41 and the fourth housing 42 enclose and define a second accommodating space 400. The circuit board assembly 50 comprises a first circuit board 51, a flexible connecting portion 53 and a second circuit board 52 connected in sequence.

[0029] The first circuit board 51 and the light emitting source 10 are accommodated in the first accommodating space 300, and the light emitting source 10 is fixed on the surface of the first circuit board 51. The first shell 31 is on the side facing the subject during use, and the second shell 32 is on the side away from the subject during use. The first shell 31 is provided with a light guiding part 310 in optical communication with the first accommodating space 300. The light emitting source 10 is arranged opposite to the light guiding part 310 and is used to emit light signals to the target object (such as the head of the monitor) through the light guiding part 310. The connection direction of the first shell assembly 30 and the second shell assembly 40 is defined as the first direction X, and the thickness direction of the first shell assembly 30 or the second shell assembly 40 (i.e. the stacking direction of the first shell 31 and the second shell 32, or the stacking direction of the third shell 41 and the fourth shell 42) is defined as the second direction Y. The first direction X is perpendicular to the second direction Y. As viewed from the second direction Y, the light guiding part 310 overlaps the light emitting source 10, so that the light emitting source 10 can emit light signals to the subject through the light guiding part 310. Since the first shell assembly 30 is movably connected to the second shell assembly 40, the light emitting source 10 fixed to the first shell assembly 30 can be fully attached to the head of the subject. In some embodiments, the light guiding part 310 can be a light emitting hole formed on the first shell 31. In other embodiments, the light guiding part 310 can also be a solid structure that the first shell 31 itself has. For example, part of the first shell 31 can be made of light-transmitting material. At this time, the light emitting source 10 can emit light signals to the target object through the part of the first shell 31. In some embodiments, the light emitting source 10 can protrude out of the light guiding part 310. The light emitting source 10 protruding out of the light guiding part 310 can have a curved surface structure. When the monitoring device 1 is a brain oxygen monitoring device 1, the light signals emitted by the light emitting source 10 can be near-infrared light signals. As shown in FIG. 6, in some embodiments, the first shell assembly 30 and the second shell assembly 40 are pivotally connected. Specifically, the first shell assembly 30 is pivotally connected to one end of the second shell assembly 40 along the first direction X through a rotating shaft S. In other embodiments, the first shell assembly 30 and the second shell assembly 40 can also be hingedly connected. Figure 3

[0030] ​The second circuit board 52 and the light sensor 20 are arranged in the second accommodating space 400, and the light sensor 20 is fixed on the second circuit board 52. The third shell 41 is arranged on the side facing the subject in use, and the fourth shell 42 is arranged on the side away from the subject in use. The third shell 41 is provided with a light receiving portion 410 in optical communication with the second accommodating space 400. The light sensor 20 is arranged opposite to the light receiving portion 410 and is used to receive the light signal after passing through the target object through the light receiving portion 410. Further, the light sensor 20 also converts the received light signal into an electrical signal, such as a current signal or a voltage signal, which is processed to obtain the human physiological information. Wherein, from the second direction Y, the light receiving portion 410 and the light sensor 20 are overlapped, so that the light sensor 20 can receive the light signal transmitted back through the light receiving portion 410. In some embodiments, the light receiving portion 410 can be a light receiving hole opened on the third shell 41, and in other embodiments, the light receiving portion 410 can also be a solid structure that the third shell 41 itself has, for example, part of the third shell 41 can be arranged as a light-transmitting material.

[0031] In some embodiments, the number of light sensors 20 is two, and the light emitting light source 10 and the two light sensors 20 are arranged along the first direction X in sequence. Please refer to Figure 5 Further, along the first direction X, the center distance L1 between the light emitting light source 10 and the light sensor 20 arranged adjacent to the light emitting light source 10 is 2-3 cm, and the center distance L2 between the two light sensors 20 is 5-20 mm. Since the center distance L1 is large, the light signal emitted by the light emitting light source 10 penetrates the brain tissue deep in the head of the subject after entering the head, and carries more information of the cerebral oxygen saturation, thereby facilitating to improve the accuracy of the measurement results of the monitoring device 1. Optionally, L1 is 3 cm, and correspondingly, the depth of the brain tissue penetrated by the light signal is about 2 cm.

[0032] The at least partially flexible connection 53 is located outside the first housing assembly 30 and the second housing assembly 40. More specifically, the at least partially flexible connection 53 can be located outside the connection between the first housing assembly 30 and the second housing assembly 40. The flexible connection 53 is used to connect the first circuit board 51 and the second circuit board 52 to achieve signal transmission. Moreover, since the flexible connection 53 is made of flexible material and the head of the subject is approximately circular, when the first housing assembly 30 and the second housing assembly 40 are relatively moved to better fit the head of the subject, the angle between the first circuit board 51 and the second circuit board 52 can also be adjusted by the flexible connection 53, so that the light emitting source 10 and the light sensor 20 are more suitable for the shape of the head. For example, the emitting surface 11 of the light emitting source 10 can be tightly attached to the skin of the head, or the sensing surface 21 of the light sensor 20 can be parallel to the tangent line at the corresponding point of the head. In some embodiments, the first circuit board 51 and the second circuit board 52 can be rigid circuit boards to provide support for the light emitting source 10 and the light sensor 20, respectively; the flexible connection 53 can be a cable to facilitate the adjustment of the angle between the first circuit board 51 and the second circuit board 52. In some embodiments, according to the function of the monitoring device 1, the cable can include three or four core wires to transmit the required electrical signals (such as driving signals for driving the light emitting source 10).

[0033] In the related art, the light emitting source and the light sensor are both fixed on the same rigid circuit board. Since the head of the subject is approximately circular, the light emitting source and the light sensor can be difficult to adapt to the shape of the head, especially when the number of light sensors is two and the light emitting source and the two light sensors are arranged in sequence along the first direction, the outermost light sensor is more likely to be tilted compared to the head, thereby affecting the emission or transmission of the light signal and the quality of the electrical signal after photoelectric conversion, and thus reducing the accuracy of the measurement results of the monitoring device. Moreover, it can be understood that if the distance between the light emitting source and the adjacent light sensor is correspondingly shortened in order to avoid the tilting of the outermost light sensor, the brain tissue penetrated by the light signal emitted by the light emitting source after entering the head of the subject becomes shallower, reducing the accuracy of the measurement results of the monitoring device. Even if the rigid circuit board used to fix the light emitting source and the light sensor is replaced by a flexible circuit board that can be bent to make the light emitting source and the light sensor adapt to the shape of the head as much as possible, however, the flexible circuit board can have broken circuit patterns or even the pins of the electronic components soldered on the flexible circuit board can be unsoldered under stress after long-term and frequent bending, affecting the reliability of the monitoring device.

[0034] In this application, when the first housing assembly 30 and the second housing assembly 40 move relative to each other to better fit the subject's head, the angle between the first circuit board 51 and the second circuit board 52 can also be adjusted accordingly by the flexible connection part 53, making the light source 10 and the light sensor 20 more adaptable to the shape of the head, improving the transmission and reception quality of the light signal, thereby improving the measurement accuracy of the monitoring device 1. Moreover, this application does not require shortening the center distance between the light source 10 and the light sensor 20 located adjacent to the light source 10, meaning that the light signal emitted by the light source 10 can penetrate deeper into the brain tissue after entering the subject's head. This application can also avoid the circuit pattern and electronic component desoldering caused by bending the circuit board itself, thus improving the reliability of the monitoring device 1.

[0035] In some embodiments, the flexible connector 53 can be welded to the first circuit board 51, and the flexible connector 53 can also be welded to the second circuit board 52, thereby improving the connection reliability between the flexible connector 53 and the first circuit board 51 and the second circuit board 52 and reducing manufacturing costs. For example, solder pads can be provided on the first circuit board 51 and the second circuit board 52 respectively to achieve connection with the flexible connector 53. In other embodiments, the flexible connector 53 can also be plugged into the first circuit board 51, and the flexible connector 53 can also be plugged into the second circuit board 52. For example, sockets can be provided on the first circuit board 51 and the second circuit board 52 respectively to achieve connection with the flexible connector 53.

[0036] In some embodiments, the light source 10 is a dual-wavelength light source, more specifically a dual-wavelength LED. For example, the light source 10 can emit near-infrared light with wavelengths of 730 nm and 850 nm respectively, and the final brain oxygen saturation can be calculated by sampling under different wavelength illumination.

[0037] like Figure 4 As shown, in some embodiments, the first housing 31 and the second housing 32 can be fixed to each other by fasteners (such as screws or bolts, not shown). More specifically, the second housing 32 is provided with a first mounting post 321 located in the first receiving space 300, and correspondingly, the first housing 31 is provided with a first mounting hole 311. Viewed from the second direction Y, the first mounting post 321 and the first mounting hole 311 overlap. Fasteners pass sequentially through the first mounting hole 311 and the first mounting post 321 from the side of the first housing 31 away from the second housing 32, thereby fixing the first housing 31 and the second housing 32 to each other. In other embodiments, the first housing 31 and the second housing 32 can also be fixed by other methods such as bonding or snap-fitting. In other embodiments, the first housing 31 and the second housing 32 can also be integrally formed.

[0038] Further, the first accommodating space 300 can further be provided with a pressing plate 33 located on the side of the first circuit board 51 away from the light emitting source 10. The pressing plate 33 can be fixed in the first housing assembly 30 and press the first circuit board 51 in the first accommodating space 300 to prevent the first circuit board 51 and the light emitting source 10 from moving in the first accommodating space 300. The pressing plate 33 can be provided with a first through hole 330. The fastener can pass through the first mounting hole 311, the first through hole 330 and the first mounting post 321 in sequence from the side of the first housing 31 away from the second housing 32, so as to fix the pressing plate 33 in the first housing assembly 30 while fixing the first housing 31 and the second housing 32 to each other.

[0039] The third housing 41 and the fourth housing 42 can be fixed to each other by another fastener (not shown). More specifically, the fourth housing 42 is provided with a second mounting post 421 located in the second accommodating space 400, and the third housing 41 is correspondingly provided with a second mounting hole 411. The second mounting post 421 overlaps the second mounting hole 411 as viewed from the second direction Y. The fastener passes through the second mounting hole 411 and the second mounting post 421 in sequence from the side of the third housing 41 away from the fourth housing 42, so as to fix the third housing 41 and the fourth housing 42 to each other. In other embodiments, the third housing 41 and the fourth housing 42 can also be fixed by adhesion, clamping or other ways. In other embodiments, the third housing 41 and the fourth housing 42 can be integrally formed. The second circuit board 52 can be provided with a second through hole 520. The fastener can pass through the second mounting hole 411, the second through hole 520 and the second mounting post 421 in sequence from the side of the third housing 41 away from the fourth housing 42, so as to fix the second circuit board 52 in the second housing assembly 40 while fixing the third housing 41 and the fourth housing 42 to each other.

[0040] As shown in some embodiments, the monitoring device 1 further comprises an elastic fixing member 60, and both ends of the elastic fixing member 60 are fixed to the first housing assembly 30 and the second housing assembly 40 respectively. Figure 1 As shown in some embodiments, the first housing assembly 30 can be further provided with a first plug-in slot 301 communicating with the first accommodating space 300, and the second housing assembly 40 is correspondingly provided with a second plug-in slot 401 at the other end thereof away from the first housing assembly 30 along the first direction X. The monitoring device 1 can further comprise the elastic fixing member 60, and both ends of the elastic fixing member 60 are inserted into the first plug-in slot 301 and the second plug-in slot 401 respectively, so that the monitoring device 1 can be worn on the head of the monitored person by the elastic fixing member 60. In some embodiments, the elastic fixing member 60 can be an elastic band.

[0041] As shown in some embodiments, the first housing assembly 30 can be further provided with a first plug-in slot 301 communicating with the first accommodating space 300, and the second housing assembly 40 is correspondingly provided with a second plug-in slot 401 at the other end thereof away from the first housing assembly 30 along the first direction X. The monitoring device 1 can further comprise the elastic fixing member 60, and both ends of the elastic fixing member 60 are inserted into the first plug-in slot 301 and the second plug-in slot 401 respectively, so that the monitoring device 1 can be worn on the head of the monitored person by the elastic fixing member 60. In some embodiments, the elastic fixing member 60 can be an elastic band. Figure 3As shown in FIG. 1, in some embodiments, the second housing assembly 40 further comprises a first light-transmissive member 43 arranged in the light-receiving portion 410. The first light-transmissive member 43 covers the sensing surface 21 of the light sensor 20. The projection of the sensing surface 21 on the first light-transmissive member 43 along the second direction Y is within the projection range of the first light-transmissive member 43. That is, along the first direction X, the width of the first light-transmissive member 43 is greater than the width of the sensing surface 21. In some embodiments, the first light-transmissive member 43 is a sheet-like structure which can be made of acrylic plastic (PMMA) with high light transmittance.

[0042] As shown in FIG. 1, in some embodiments, the second housing assembly 40 further comprises a first light-transmissive member 43 arranged in the light-receiving portion 410. The first light-transmissive member 43 covers the sensing surface 21 of the light sensor 20. The projection of the sensing surface 21 on the first light-transmissive member 43 along the second direction Y is within the projection range of the first light-transmissive member 43. That is, along the first direction X, the width of the first light-transmissive member 43 is greater than the width of the sensing surface 21. In some embodiments, the first light-transmissive member 43 is a sheet-like structure which can be made of acrylic plastic (PMMA) with high light transmittance. Figure 3 Figure 4 As shown in FIG. 1, in some embodiments, the second housing assembly 40 further comprises a first light-transmissive member 43 arranged in the light-receiving portion 410. The first light-transmissive member 43 covers the sensing surface 21 of the light sensor 20. The projection of the sensing surface 21 on the first light-transmissive member 43 along the second direction Y is within the projection range of the first light-transmissive member 43. That is, along the first direction X, the width of the first light-transmissive member 43 is greater than the width of the sensing surface 21. In some embodiments, the first light-transmissive member 43 is a sheet-like structure which can be made of acrylic plastic (PMMA) with high light transmittance.

[0043] As shown in FIG. 1, in some embodiments, the second housing assembly 40 further comprises a first light-transmissive member 43 arranged in the light-receiving portion 410. The first light-transmissive member 43 covers the sensing surface 21 of the light sensor 20. The projection of the sensing surface 21 on the first light-transmissive member 43 along the second direction Y is within the projection range of the first light-transmissive member 43. That is, along the first direction X, the width of the first light-transmissive member 43 is greater than the width of the sensing surface 21. In some embodiments, the first light-transmissive member 43 is a sheet-like structure which can be made of acrylic plastic (PMMA) with high light transmittance. Figure 3 Figure 4 As shown in FIG. 1, in some embodiments, the second housing assembly 40 further comprises a first light-transmissive member 43 arranged in the light-receiving portion 410. The first light-transmissive member 43 covers the sensing surface 21 of the light sensor 20. The projection of the sensing surface 21 on the first light-transmissive member 43 along the second direction Y is within the projection range of the first light-transmissive member 43. That is, along the first direction X, the width of the first light-transmissive member 43 is greater than the width of the sensing surface 21. In some embodiments, the first light-transmissive member 43 is a sheet-like structure which can be made of acrylic plastic (PMMA) with high light transmittance.

[0044] Further, the fourth housing 42 is provided with a window 420. The subject or other relevant personnel can read the physiological information of the human body displayed on the display screen 71 through the window 420. The second housing assembly 40 further comprises a second light-transmissive member 45 arranged in the window 420, which covers the display screen 71. The projection of the display screen 71 on the second light-transmissive member 45 along the second direction Y is within the projection range of the second light-transmissive member 45. That is, along the first direction X, the width of the second light-transmissive member 45 is greater than the width of the display screen 71. The display screen 71 covers the entire window 420, so as to avoid the external light entering the inside of the monitoring device 1 through the window 420, i.e. to prevent the interference of external light. In some embodiments, the second light-transmissive member 45 is a sheet-like structure which can be made of acrylic plastic (PMMA).

[0045] ​​In some embodiments, the second housing assembly 40 further comprises a fixing frame 46 fixed to one side of the third housing 41 facing the fourth housing 42, and the display screen 71 is fixed to the fixing frame 46, so as to fix the display screen 71 inside the monitoring device 1. The first circuit board 51 and the power supply component 80 are located on the side of the fixing frame 46 away from the display screen 71. Among them, the number of fixing frames 46 can be two or more, which are arranged on the third housing 41 in the first direction X.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An optical signal based monitoring device, characterized in that, The application relates to a monitoring device based on light signals, comprising: a first shell assembly having a first accommodating space and a light guiding part in optical communication with the first accommodating space; a circuit board assembly comprising a first circuit board, a flexible connecting part and a second circuit board connected in sequence, the first circuit board being arranged in the first accommodating space; a light emitting light source arranged in the first accommodating space and fixed to the first circuit board, the light emitting light source being arranged opposite to the light guiding part and configured to emit a light signal towards a target object through the light guiding part; a second shell assembly movably connected to the first shell assembly, the second shell assembly having a second accommodating space and a light receiving part in optical communication with the second accommodating space, the second circuit board being arranged in the second accommodating space, and at least part of the flexible connecting part being arranged outside the first shell assembly and the second shell assembly; and a light sensor arranged in the second accommodating space and fixed to the second circuit board, the light sensor being arranged opposite to the light receiving part and configured to receive the light signal after passing through the target object through the light receiving part. The flexible connecting part is welded to the first circuit board and / or the second circuit board.

2. The optical signal based monitoring device of claim 1, wherein, The flexible connecting part is inserted into the first circuit board and / or the second circuit board.

3. The optical signal based monitoring device of claim 1, wherein, The light emitting light source is a dual-wavelength light emitting light source.

4. The optical signal based monitoring device of claim 1, wherein, The number of the light sensors is two, the light emitting light source and the two light sensors are arranged in a first direction in sequence, and the first direction is the connecting direction of the first shell assembly and the second shell assembly.

5. The optical signal based monitoring device of claim 1, wherein, In the first direction, the center distance between the light emitting light source and one of the light sensors arranged adjacent to the light emitting light source is 2-3 cm, and the center distance between the two light sensors is 5-20 mm.

6. The optical signal based monitoring device of claim 5, wherein, The monitoring device further comprises a chip and a display screen arranged in the second accommodating space, the chip is configured to determine human physiological information based on the light signal received by the light sensor, and the display screen is configured to display the human physiological information.

7. The optical signal based monitoring device of claim 1, wherein, The monitoring device further comprises an elastic fixing member, two ends of the elastic fixing member being fixed to the first shell assembly and the second shell assembly respectively.

8. The optical signal based monitoring device of claim 1, wherein, The flexible connecting part is a cable.

9. The optical signal based monitoring device of claim 1, wherein, The first shell assembly and the second shell assembly are pivotally connected or hinged.

10. The optical signal based monitoring device of claim 1, wherein, The monitoring device based on light signals is a brain blood oxygen monitoring device, the light signal is a near-infrared light signal and is configured to determine brain blood oxygen saturation information.

11. The optical signal based monitoring device according to any of claims 1 to 10, characterized in that ​

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