Head-mounted assembly and near-infrared brain function imaging head cap assembly

Abstract

The utility model provides a head-mounted assembly and a near-infrared brain function imaging head cap assembly. The head-mounted assembly is used for being worn on the head of a subject together with the near-infrared brain function imaging head cap, the head-mounted assembly comprises a head band surrounding the head of the subject, the front side of the head band is provided with a shading section containing a near-infrared light shading material, and the shading section is provided with an upper edge, a lower edge and a shading part continuously extending between the upper edge and the lower edge; the upper edge and the lower edge respectively comprise a first smooth part and a second smooth part which are centered; under the condition that the head-mounted assembly is worn on the head of a subject, the upper edge extends across the forehead of the subject, and the first smooth part is located at a first preset height above the high points of orbital bones on the two sides of the subject; the lower edge extends across the upper eyelid of the subject, and the second smooth part is located at a second preset height below the high points of orbital bones on the two sides of the subject, so that no exposed area exists at the forehead of the subject, the blocking efficiency of the shading section to near-infrared light is improved, and the accuracy of measured data of the fNIRS probe is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a head-mounted assembly and a near-infrared brain functional imaging headgear assembly. Background Technology

[0002] Near-infrared functional brain imaging (fNIRS) equipment is susceptible to interference from ambient light during signal acquisition, especially when used in conjunction with other modalities (eye tracking, motion capture, etc.). The near-infrared frequency band with wavelengths of 650-900 nm is particularly prone to interfering with fNIRS equipment, causing signal interference in the acquired data.

[0003] To reduce the impact of ambient light, especially near-infrared light, researchers have adopted various strategies, including using equipment with strong anti-interference capabilities, optimizing the experimental environment, improving the configuration of light sources and detectors, and developing advanced signal processing algorithms to remove or correct interference caused by external light sources. However, the effect of reducing ambient light interference, especially near-infrared light, is not particularly ideal. Utility Model Content

[0004] This application aims to provide a headgear assembly and a near-infrared brain functional imaging headgear assembly to solve the problem that near-infrared brain functional imaging equipment is easily interfered with by external ambient light, especially near-infrared light, during the detection process.

[0005] According to a first aspect of this application, a headgear assembly is provided. The headgear assembly is worn on the head of a subject together with a near-infrared brain functional imaging headgear. The headgear assembly includes: a headband surrounding the subject's head, the headband including a light-shielding section located on the front side, the light-shielding section containing a near-infrared light-shielding material, the light-shielding section having an upper edge and a lower edge, and a light-shielding portion continuously extending between the upper edge and the lower edge, the upper edge including a centrally located first smooth portion, and the lower edge including a centrally located second smooth portion; when the headgear assembly is worn on the subject's head, the upper edge extends across the subject's forehead in a natural or stretched state, and the first smooth portion is located at a first predetermined height above the highest points of the orbital bones on both sides of the subject; the lower edge extends across the subject's upper eyelids in a natural or stretched state, and the second smooth portion is located at a second predetermined height below the highest points of the orbital bones on both sides of the subject.

[0006] In some embodiments, the first preset height is 5mm-30mm above the highest point of the orbital bone, and the second preset height is 3mm-35mm below the highest point of the orbital bone.

[0007] In some embodiments, the headband also includes a pressure section located at the rear, which extends circumferentially across the occipital bone of the subject in a natural or stretched state when the headband is worn on the subject's head, and the width of the pressure section is not less than 40 mm.

[0008] In some embodiments, the head-mounted assembly further includes a positioning mechanism connected to the headband and configured to position the headband onto the subject's head.

[0009] In some embodiments, the headband has a first end and a second end, and the positioning mechanism includes a first positioning mechanism configured to have a connected state and a released state for the first end and the second end. When the first end and the second end are in the connected state, the headband can be worn on the subject's head, and when the first end and the second end are in the released state, the headband can be removed from the subject's head.

[0010] In some embodiments, the first positioning mechanism includes: a first portion disposed at a first end; and a second portion disposed at a second end, wherein the connection or disconnection of the first portion and the second portion allows the first end and the second end to have a connected state or a released state, wherein the ratio between the width of the second end and the width of the first end is in the range of 75%-135%.

[0011] In some embodiments, the first positioning mechanism includes a rigid member connected between a first end and a second end and extending in a plane containing the first end and the second end, the curvature of the rigid member being adjustable under external force, such that the first end and the second end have a connected state and a released state.

[0012] In some embodiments, the positioning mechanism includes a second positioning mechanism configured to connect a headband to the subject's ears and / or chin and / or near-infrared brain functional imaging cap when the headgear is worn on the subject's head.

[0013] In some embodiments, anti-slip strips are provided on the inner side of the headband.

[0014] In some embodiments, the light-shielding section containing near-infrared light-shielding material includes one layer or several layers arranged sequentially from the inside to the outside, wherein at least one layer is light-shielding velvet.

[0015] According to a second aspect of this application, a near-infrared brain functional imaging headgear assembly is provided. The near-infrared brain functional imaging headgear assembly includes: a near-infrared brain functional imaging headgear, on which multiple probe mounting portions are disposed, and the near-infrared brain functional imaging headgear includes a forehead extension located in front of the probe mounting portions at the forehead; and a headband assembly according to various embodiments of this application, wherein when the near-infrared brain functional imaging headgear and the headband assembly are worn together on the subject's head, the upper edge is circumferentially fitted to the forehead extension of the near-infrared brain functional imaging headgear in a natural or stretched state, and the lower edge is lower than the forehead extension of the near-infrared brain functional imaging headgear, such that there is no exposed area between the forehead extension of the near-infrared brain functional imaging headgear and the light-blocking section of the headband.

[0016] Compared with the prior art, the beneficial effects of the embodiments of this utility model are as follows:

[0017] The head-mounted assembly provided in this embodiment of the invention, when worn on the subject's head together with a near-infrared brain functional imaging headgear, has its upper edge extending across the subject's forehead in either a natural or stretched state, with a first smooth portion located at a first preset height above the highest points of the orbital bones on both sides of the subject; the lower edge extends across the subject's upper eyelid in either a natural or stretched state, with a second smooth portion located at a second preset height below the highest points of the orbital bones on both sides of the subject. This ensures the coverage of the subject's head by the light-blocking section, effectively improving the blocking efficiency of the light-blocking section against the near-infrared light emitted by the modal device, and significantly reducing the interference of near-infrared light on the fNIRS probe signal acquisition. Thus, the accuracy of the measurement data from the fNIRS probe can be greatly improved.

[0018] This utility model description introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0019] The advantages and features of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] The following drawings, which are incorporated herein by reference and are used to understand this application, illustrate embodiments of the invention and their descriptions to explain the principles of the invention. In the drawings,

[0021] Figure 1a and 1b The front view and side view of the near-infrared brain functional imaging headgear assembly according to the first exemplary embodiment of this application, worn on the head of a subject, are shown respectively.

[0022] Figure 2a and 2b The side and rear views of the near-infrared brain functional imaging headgear assembly according to the second exemplary embodiment of this application, worn on the head of a subject, are shown respectively.

[0023] Figure 3a and 3b A side view and a rear view of a near-infrared brain functional imaging headgear assembly according to a third exemplary embodiment of this application are shown respectively;

[0024] Figure 4 It shows Figure 3a and 3b A schematic diagram of the use of the first positioning mechanism in the embodiment shown, in which the first end and the second end are in a released state.

[0025] Figure 5 It shows Figure 3a and 3b A schematic diagram of the use of the first positioning mechanism in the embodiment shown, in which the first end and the second end are connected.

[0026] Figure 6 A side view of a near-infrared brain functional imaging headgear assembly according to a fourth exemplary embodiment of this application is shown;

[0027] Figure 7 A side view of a near-infrared brain functional imaging headgear assembly according to a fifth exemplary embodiment of this application is shown;

[0028] Figure 8a and 8b A side view and a rear view of a near-infrared brain functional imaging headgear assembly according to a sixth exemplary embodiment of this application are shown;

[0029] Figure 9 A front view of an anti-slip strip according to an exemplary embodiment of this application is shown; and

[0030] Figure 10 A schematic diagram showing the position of the headband on the skull is shown.

[0031] The above figures include the following reference numerals:

[0032] 100. Headgear assembly; 1001. High point of the orbital bone; 200. Head cap; 210. Forehead extension; 220. Rear part; 230. Probe mounting part; 240. fNIRS probe; 250. Hole position; 300. Headband; 301. First end; 302. Second end; 310. Light-shielding section; 311. Upper edge; 311a. First smooth part; 312. Lower edge; 312a. Second smooth part; 313. Light-shielding part; 320. Pressure section; 330. Anti-slip strip; 400. Positioning mechanism; 410. First positioning mechanism; 411. First part; 412. Second part; 413. Rigid component; 420. Second positioning mechanism; 500. Subject's head. Detailed Implementation

[0033] In the following description, numerous details are provided to enable a thorough understanding of this application. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the application, and that the application can be implemented without one or more of these details. Furthermore, to avoid confusion with this application, some technical features well-known in the art have not been described in detail.

[0034] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.

[0035] The researchers in this application found that the main reasons why near-infrared functional brain imaging (fNIRS) devices are susceptible to the influence of ambient light, especially near-infrared light, include: 1) Light source sensitivity: fNIRS devices measure brain activity by emitting and receiving near-infrared light. The device is very sensitive to light sources, and changes in ambient light, especially near-infrared light, may interfere with these measurements; 2) Light scattering and absorption: Near-infrared light is scattered and absorbed when penetrating brain tissue. The presence of external light sources may increase scattered light, thereby affecting the accurate detection of changes in brain hemoglobin by the fNIRS device; 3) Device calibration: The intensity and wavelength of the light source need to be kept stable to ensure data quality. Fluctuations in ambient light may affect device calibration, thereby affecting the stability and reliability of the data; 4) Data acquisition environment: The stability of the experimental environment is crucial during data acquisition. Interference from external light sources and the movement of the subject may produce artifacts, affecting the accuracy of the data. 5) Non-stationary waveforms: fNIRS signals are inherently non-stationary, meaning they may contain components not related to neuronal activity caused by changes in the external environment. These components need to be removed through preprocessing to reduce interference with the data. 6) Systemic hemodynamic responses: Modulation of the heart, respiration, and blood pressure can also affect the recorded data. These systemic hemodynamic response sources are part of the high-frequency interference of neuronal hemodynamic responses. Ambient light may affect these physiological processes, thereby affecting the fNIRS signal.

[0036] To reduce the influence of ambient light, especially near-infrared light, existing technologies have adopted various strategies for equipment improvement and environmental optimization, but the effects have been limited. The inventors of this application have verified that interference signals are mainly concentrated in the area directly above the eye socket on the forehead, where the channel signal interference around the receiving probe is most pronounced. Therefore, this invention provides a head-mounted assembly that, when worn in conjunction with a near-infrared brain functional imaging cap, extends across the subject's forehead in both natural and stretched states, with a first smooth portion located at a first preset height above the highest points of the orbital bones on both sides of the subject. The lower edge extends across the subject's upper eyelids in both natural and stretched states, with a second smooth portion located at a second preset height below the highest points of the orbital bones on both sides of the subject, ensuring no exposed area on the subject's forehead. This ensures that the light-blocking section covers the subject's head, effectively improving the blocking efficiency of the light-blocking section against the near-infrared light emitted by the modal device, and significantly reducing the interference of near-infrared light on the fNIRS probe signal acquisition. As a result, the accuracy of the measurement data of the fNIRS probe can be greatly improved, while also saving costs.

[0037] According to one aspect of this application, a head-mounted assembly 100 is provided. For example... Figure 1a and 1b As shown, the headgear 100 can be worn in conjunction with the near-infrared brain functional imaging headgear 200 (hereinafter referred to as headgear 200) on the subject's head 500. When the headgear 100 is worn on the subject's head 500, it can be located on the outside of the headgear 200. The fNIRS probe 240 provided on the headgear 200 can detect the fNIRS signal of the subject's brain. The term "head" as used in this application refers to organs above the neck (cervical spine), including the brain and extracranial tissues such as the skull, skin, and hair. The term "brain" as used in this application refers to the organ remaining after the removal of extracranial tissues, mainly intended to refer to the cerebrum, but not limited to it, and may also include the cerebrum, cerebellum, and brainstem.

[0038] According to another aspect of this application, a near-infrared brain functional imaging headgear assembly (hereinafter referred to as the headgear assembly) is also provided. The headgear assembly may include a headgear 200 and a head-mounted assembly 100 according to various embodiments of this application. The headgear 200 may be provided with a plurality of probe mounting portions 230. Typically, each probe mounting portion 230 can be used to mount one fNIRS probe 240. With the aid of the probe mounting portions 230, the fNIRS probe 240 can be conveniently and detachably connected to a predetermined position on the headgear 200. The probe mounting portions 230 can be constructed in any structure, as long as they can accommodate the fNIRS probe 240. After the fNIRS probe 240 is mounted on the headgear 200, the detection channel formed between the transmitting probe and the receiving probe can cover any brain region of interest, including but not limited to one or more of the frontal lobe, temporal lobe, parietal lobe, occipital lobe, and greater motor cortex. Figure 2a As shown, the headgear 200 may include a forehead extension 210. The forehead extension 210 extends along the circumferential direction of the subject's head. The fNIRS probe 240 corresponding to the frontal lobe region may be located above the forehead extension 210, that is, the forehead extension 210 is located in front of the probe mounting portion 230 at the forehead, and the forehead extension 210 forms the front end of the headgear 200. When the headgear 200 is worn on the subject's head 500, the forehead extension 210 may abut against the forehead of the subject's head 500.

[0039] The headgear assembly 100 may include a headband 300. The headband 300 may be generally loop-shaped. When the headgear assembly 100 is worn on the head 500 of a subject, the headband 300 may wrap around the subject's head 500. For example, as shown... Figure 1a and 1b As shown, the headband 300 generally extends circumferentially along the head 500 of the subject. The headband 300 may include a light-shielding section 310. The light-shielding section 310 may be located at the front of the headband 300. The light-shielding section 310 may contain a near-infrared light-shielding material. That is, the light-shielding section 310 may be made of a light-shielding material that completely prevents the passage of near-infrared light, or it may be made of a light-shielding material that blocks a portion of the near-infrared light (especially wavelengths in the 650-900 nm range) or that does not achieve 100% blocking of near-infrared light. Thus, the light-shielding section 310 containing a near-infrared light-shielding material can effectively reduce or prevent the passage of near-infrared light. Near-infrared light-shielding materials include, but are not limited to, fabric, plastic, or metal. Exemplarily, other parts of the headband 300 may also contain near-infrared light-shielding materials.

[0040] The light-blocking section 310 may have an upper edge 311, a lower edge 312, and a light-blocking portion 313. The light-blocking portion 313 may extend continuously between the upper edge 311 and the lower edge 312. The upper edge 311 may include a centrally located first smooth portion 311a. The lower edge 312 may include a centrally located second smooth portion 312a. The central location is relative to the subject's head 500; that is, along the circumferential direction of the subject's head 500, the first smooth portion 311a and the second smooth portion 312a may be generally located in the middle region of the subject's face. The middle region, for example, corresponds to the area between the eyes. Optionally, along the circumferential direction, the middle region may be longer or shorter than the area between the eyes. The first smooth portion 311a and the second smooth portion 312a may each be a smooth line without breaks and / or obvious inflections.

[0041] Optionally, the headband 300 can be elastic. Thus, the headband 300 can have a natural state and a stretched state. The headband 300 can switch from a natural state to a stretched state under the action of an external force. When the headband 300 is worn on the subject's head 500, the headband 300 can be in a stretched state. When the headband 300 is properly worn and the external force is removed, it can return to its natural state due to its own elasticity, or it can remain in a slightly stretched state to provide some pressure to the headgear 200. Therefore, it can be tightly secured to the subject's head 500 together with the headgear 200, preventing the headband 300 from slipping off. Optionally, the headband 300 may also be non-elastic. Thus, the headband 300 can only have a natural state. In this embodiment, the headband 300 can have a connecting structure at which it can be broken into a strip shape, and when the connecting structure is connected, the headband 300 can also be in a loop shape. Before the headband 300 is placed on the subject's head 500, the connecting structure can be disconnected. During the process of placing it on the subject's head 500, a certain tension can be applied to both ends of the headband 300 to secure the connecting structure. Although the headband 300 is not elastic at this time, it can still apply a certain amount of pressure to the subject's head 500 after it is properly placed. That is to say, after it is properly placed, the circumference of the headband 300 is slightly smaller than the circumference of the subject's head within the plane it surrounds. Thus, it can be tightly secured to the subject's head 500 together with the headgear 200 to prevent the headband 300 from slipping off.

[0042] Optionally, the headband 300 may be partially elastic while the other part is not. For example, one or both of the upper edge 311 and the lower edge 312 may be elastic, or neither may be elastic. Therefore, the upper edge 311 and the lower edge 312 will be described in detail below.

[0043] With the headgear 100 worn on the subject's head 500, the upper edge 311 can extend across the subject's forehead in either a natural or stretched state. The upper edge 311 can be elastic or inelastic; in either case, it can cross the subject's forehead after the head 500 is in place. Furthermore, the first smooth portion 311a can be located at a first predetermined height above the orbital bone high points 1001 on both sides of the subject. The orbital bone high points 1001 can be found in [reference needed]. Figure 10 The first smooth portion 311a extends smoothly across the orbital bone high points 1001 on both sides of the subject at a first preset height above the orbital bone high point 1001.

[0044] With the headgear 100 worn on the subject's head 500, the lower edge 312 can extend across the upper eyelids on both sides of the subject in either a natural or stretched state. Similar to the upper edge 311, the lower edge 312 can be elastic or non-elastic, and in either case, it can extend across the upper eyelids on both sides of the subject after the head 500 is in place. Furthermore, the second smooth portion 312a can be located at a second predetermined height below the orbital bone high point 1001 on both sides of the subject. Thus, the lower edge 312 can be lower than the forehead extension 210 of the cap 200. Therefore, when the headgear 100 and cap 200 are worn on the subject's head 500, there is no gap between the projections formed on the subject's forehead by the forehead extension 210 of the cap 200 and the light-blocking section 310 of the headband 300, resulting in no exposed area of ​​the forehead between them.

[0045] On the one hand, the light-blocking section 310 of the headband 300 can cover more of the subject's forehead, effectively extending the forehead extension 210 of the cap 200 downwards. This lengthens the path of ambient light entering the cap 200 through the gap between the forehead extension 210 and the forehead, and also increases the bend in this path, thereby reducing the amount of light entering the cap 200. On the other hand, as mentioned earlier, to prevent the headband 300 from slipping off, the headband 300 typically applies a certain amount of pressure to the cap 200. For example, the upper edge 311 can apply an external force along the circumferential direction to the forehead extension 210 of the headgear 200, so that the forehead extension 210 of the headgear 200 can fit tightly against the forehead of the subject, thereby reducing the gap between the forehead extension 210 of the headgear 200 and the forehead, reducing the amount of ambient light entering the headgear 200 through the gap, thereby significantly reducing the interference of external ambient light, especially near-infrared light, on the near-infrared brain functional imaging headgear assembly during the detection process, greatly improving the stability and reliability of the data during the acquisition process, and effectively ensuring the accuracy of the detection data.

[0046] Furthermore, in practice, it has been found that the shape of the foreheads of test subjects varies considerably. After the cap 200 and headband assembly 100 are worn together on the test subject's head 500, the forehead extension 210 of the cap 200 can be held between the headband 300 and the forehead of the test subject's head 500 under the use of the headband 300. This overcomes the differences in head shape of the test subject's head 500, ensuring that the cap 200 does not become loose. Thus, the near-infrared light emitted by the fNIRS probe 240 and ambient light cannot be transmitted through the gap between the forehead extension 210 and the test subject's forehead, thereby avoiding the possibility of light leakage and significantly reducing the probability of near-infrared light interference with the acquired signal. Moreover, the light-blocking section 310 can block the near-infrared light emitted by the modal device, preventing it from illuminating the test subject's head 500. This greatly improves the accuracy of the measurement data from the fNIRS probe 240.

[0047] In some embodiments, the first preset height can be 5mm-30mm above the orbital bone high point 1001, for example, it can be 5mm, 10mm, 15mm, 20mm, 25mm, 30mm or any value between them. When the distance between the first smooth portion 311a and the orbital bone high point 1001 is less than 5mm, the first smooth portion 311a is too close to the orbital bone high point 1001, making it difficult to fully fit the forehead extension 210, and thus difficult to achieve no exposed area between it and the forehead extension 210. When the distance between the first smooth portion 311a and the orbital bone high point 1001 is greater than 30mm, the light-blocking section 310 will cover an excessively large area of ​​the headgear 200, causing the probe mounting portion 230 of the headgear 200 to be set backward, thus causing the fNIRS probe 240 to not fully cover the frontal lobe area of ​​the subject. In this way, the fNIRS probe 240 cannot fully measure the effective data of the subject's frontal lobe area.

[0048] In some embodiments, the second preset height can be 3mm-35mm below the orbital bone high point 1001, for example, it can be 3mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm or any value between them. When the distance between the second smooth portion 312a and the orbital bone high point 1001 is less than 3mm, it will affect the coverage of the light-blocking section 310, which may cause a small amount of ambient light to enter the headgear. When the distance between the second smooth portion 312a and the orbital bone high point 1001 is greater than 35mm, the light-blocking section 310 will affect the subject's eye movement and even block the subject's vision, which will cause excessive pressure on the subject, causing extreme discomfort during the test, and making the subject prone to anxiety, irritability and other problems. The subject is likely to resist the test, thus reducing the test results.

[0049] In some embodiments, the light-shielding section 310 containing near-infrared light-shielding material may include one layer or several layers arranged sequentially from the inside out, such as two, three, or more layers. At least one layer may be a light-shielding fleece. Exemplarily, the light-shielding fleece may include a matte frosted fleece. Exemplarily, the light-shielding fleece may be made of matte, high-fastness nylon fabric. Exemplarily, the lining or the entire light-shielding fabric may be black. Black offers better light-shielding properties compared to other colors. Exemplarily, the weight of the light-shielding fleece may be 100 g / m². 2 -200g / m 2 For example, the entire headband 300 can be made of light-blocking fleece. Light-blocking fleece has good light-blocking properties, effectively preventing near-infrared light from passing through. Furthermore, the light-blocking fleece has good elasticity, exhibiting uniform stretching capacity in at least two perpendicular directions within its plane, facilitating switching between a natural state and a stretched state. Thus, the light-blocking section 310 can be switched to the stretched state without requiring significant force, facilitating the wearing of the headgear 100 on the subject's head 500. And, when the headgear 100 is worn on the subject's head 500, the headband 300 can apply adequate pressure to the headgear 200. This pressure secures the headgear 200, reducing the possibility of near-infrared light interference with the acquired signal, while ensuring that the pressure on the subject is not excessive and does not cause discomfort.

[0050] In some embodiments, such as Figure 2a , 2bAs shown in 3b, the headband 300 may further include a pressure section 320. The pressure section 320 may be located at the rear of the headband 300. The pressure section 320 and the light-shielding section 310 may be arranged opposite each other in the front-back direction. When the headgear 100 is worn on the subject's head 500, the pressure section 320 may extend circumferentially across the subject's occipital bone in a natural or stretched state. In other words, the pressure section 320 may extend circumferentially along the occipital bone corresponding to the fNIRS probe 240 at a corresponding position in the occipital lobe region. The pressure section 320 may be located outside the fNIRS probe 240 at the rear 220 of the headgear 200. The fNIRS probe 240 at the rear 220 of the headgear 200 may be generally used to detect fNIRS signals in the occipital lobe region. The pressure section 320 applies pressure to the fNIRS probe 240 at the rear 220, allowing the fNIRS probe 240 to better conform to the subject's scalp for more accurate fNIRS signal detection. This effectively prevents movement of the fNIRS probe 240 at the rear 220, especially during subject movement. The width of the pressure section 320 can be no less than 40 mm, for example, 40 mm, 42 mm, 45 mm, or any value between them. The term "width" as used in this application refers to the dimension perpendicular to the extension direction of its corresponding component; the angle shown in the figures is generally a dimension in the vertical direction. Thus, the pressure section 320 can cover at least two rows of fNIRS probes 240 at the rear 220 of the cap 200.

[0051] In some embodiments, such as Figure 3a , Figures 4 to 5 As shown, the headband assembly 100 may further include a positioning mechanism 400. The positioning mechanism 400 can be connected to the headband 300 by any suitable method, such as adhesive or sewing. The positioning mechanism 400 can be configured to position the headband 300 to the subject's head 500. Exemplarily, the positioning mechanism 400 can position the headband 300 to the subject's head 500 in various ways, such as by stretching the headband 300 to secure it tightly to the subject's head 500, or by connecting it to tissues such as the subject's ears. The structure of the positioning mechanism 400 can be arbitrary, including but not limited to straps, Velcro, tape, hooks, and / or clips. By setting up the positioning mechanism 400, displacement of the headband 300 can be prevented, thereby ensuring the stability and reliability of the collected data.

[0052] In some embodiments, such as Figure 3a , Figures 4 to 5As shown, the headband 300 may have a first end 301 and a second end 302. The first end 301 and the second end 302 may be spaced apart along the circumferential direction of the subject's head 500. The positioning mechanism 400 may include a first positioning mechanism 410. The first positioning mechanism 410 may be configured to allow the first end 301 and the second end 302 to be in a connected state (e.g., Figure 5 (as shown) and release state (as shown) Figure 4 (As shown). The first positioning mechanism 410 includes, but is not limited to, straps, Velcro, or tape.

[0053] When the first end 301 and the second end 302 are connected, the headband 300 can be worn on the subject's head 500.

[0054] With the first end 301 and the second end 302 in the released state, the headband 300 can detach from the subject's head 500. In practical applications, when testing is not required, the first end 301 and the second end 302 can be in the released state, allowing the headband 300 to be in a natural state. When testing is required, the headband 300 can be moved to the subject's head 500. Then, the first positioning mechanism 410 can connect the first end 301 and the second end 302, allowing the headband 300 to be worn on the subject's head 500, thus placing the headband 300 in a stretched state. After testing is completed, the first positioning mechanism 410 can switch the first end 301 and the second end 302 back to the released state, allowing the headband 300 to detach from the subject's head 500. This configuration makes the headband 300 easy to put on and take off, providing a better user experience. The first positioning mechanism 410 can apply a force to the headband 300 along the circumferential direction of the subject's head 500, allowing the headband 300 to be in both a natural and stretched state.

[0055] In some embodiments, the first positioning mechanism 410 may include a first portion 411 and a second portion 412. The first portion 411 may be disposed at a first end 301. The second portion 412 may be disposed at a second end 302. When the first portion 411 is connected to the second portion 412, the first end 301 and the second end 302 may be in a connected state. When the first portion 411 is disengaged from the second portion 412, the first end 301 and the second end 302 may be in a released state. The ratio between the width of the second end 302 and the width of the first end 301 may be in the range of 75%-135%. When the ratio between the width of the second end 302 and the width of the first end 301 is lower than or higher than this range, when the first portion 411 is connected to the second portion 412, under pressure, the wider end of the first end 301 and the second end 302 may fold outwards, thereby affecting the anti-ambient light, especially near-infrared light interference effect of the light-shielding section 310, and the magnitude of the pressure applied by the pressure section 320 to the fNIRS probe 240.

[0056] In some embodiments, one of the first portion 411 and the second portion 412 can be a Velcro strap, while the other of the first portion 411 and the second portion 412 can be an annular hole. The Velcro strap can pass through the annular hole, then fold and adhere to itself. The Velcro strap can adjust the distance between the first end 301 and the second end 302 according to the head shape of the subject's head 500, so that the headband 300 can be worn on the heads of subjects 500 with different head shapes and provides good pressure to the subject's head 500. Thus, the headband 300 has good applicability. The first positioning mechanism 410 can be located on the left, right, or rear side of the subject's head 500 (e.g., Figure 8a and Figure 8b (As shown).

[0057] In other embodiments, such as Figure 6 As shown, the first positioning mechanism 410 may include a rigid member 413. The rigid member 413 can be connected between the first end 301 and the second end 302. Furthermore, the rigid member 413 can bend and extend within the plane containing the first end 301 and the second end 302. The curvature of the rigid member 413 is adjustable under external force, allowing adjustment of the distance between the first end 301 and the second end 302, enabling both a connected state and a released state. Moreover, by adjusting the curvature of the rigid member 413, it can pass through the gaps between the fNIRS probes 240, thereby reducing the impact on the fNIRS probes 240 and preventing artifact interference from contact with the fNIRS probes 240. The placement of the rigid member 413 does not alter the arrangement of the fNIRS probes 240 on the cap 200.

[0058] In some embodiments, such as Figure 7 , Figure 8a and 8b As shown, the positioning mechanism 400 may include a second positioning mechanism 420. The second positioning mechanism 420 may be configured to connect the headband 300 to the subject's ears and / or chin and / or headgear 200 when the headgear assembly 100 is worn on the subject's head 500. The chin refers to the lowest part of the face, below the mouth, commonly known as the "chin." In some embodiments, the second positioning mechanism 420 may connect the headband 300 to the subject's chin. Figure 7 In the illustrated embodiment, the second positioning mechanism 420 can connect the headband 300 to the subject's ears. Exemplarily, the second positioning mechanism 420 can connect the headband 300 to one or both ears of the subject. The second positioning mechanism 420 can be secured to the lower edge of the subject's ears. The second positioning mechanism 420 includes, but is not limited to, cables or strips of cloth. Figure 8a and Figure 8bIn the illustrated embodiment, the second positioning mechanism 420 can connect the headband 300 to the chin rest positions 250 at both ends of the headgear 200. The second positioning mechanism 420 includes, but is not limited to, cables or strips of cloth.

[0059] In some embodiments, such as Figure 8a and Figure 8b As shown, the positioning mechanism 400 may include a first positioning mechanism 410 and a second positioning mechanism 420. The first positioning mechanism 410 and the second positioning mechanism 420 may apply force to the headband 300 in different directions to make the headgear assembly 100 more stably worn on the subject's head 500.

[0060] In some embodiments, such as Figure 9 As shown, an anti-slip strip 330 may be provided on the inner surface of the headband 300. The anti-slip strip 330 includes, but is not limited to, rubber strips, silicone strips, or other anti-slip strips with anti-slip properties. The anti-slip strip 330 can be clamped between the headband 300 and the cap 200, thereby providing significant friction with both the headband 300 and the cap 200. One or more anti-slip strips 330 may be included. In embodiments where multiple anti-slip strips 330 are included, the multiple anti-slip strips 330 may be clamped between the headband 300 and the cap 200 at different positions. By providing the anti-slip strip 330, relative sliding between the headband 300 and the cap 200 can be prevented (e.g., relative sliding along the circumferential direction of the subject's head 500, or relative sliding along the longitudinal direction of the subject's head 500). Thus, even if the subject moves during the test, the headband 300, fixed relative to the cap 200, can always ensure that the effect of reducing interference light does not deteriorate, thereby maintaining the accuracy of the measurement data.

[0061] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0062] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0063] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0064] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar subjects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0065] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the scope of the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A head-mounted assembly, characterized in that, The headgear assembly is worn on the head of a subject together with a near-infrared brain functional imaging headgear. The headgear assembly includes: a headband that surrounds the subject's head, the headband including a light-shielding section located on the front side, the light-shielding section containing a near-infrared light-shielding material, the light-shielding section having an upper edge and a lower edge and a light-shielding portion extending continuously between the upper edge and the lower edge, the upper edge including a centrally located first smooth portion, and the lower edge including a centrally located second smooth portion; When the headgear is worn on the subject's head, the upper edge extends across the subject's forehead in a natural or stretched state, and the first smooth portion is located at a first preset height above the highest point of the orbital bone on both sides of the subject; the lower edge extends across the upper eyelids on both sides of the subject in a natural or stretched state, and the second smooth portion is located at a second preset height below the highest point of the orbital bone on both sides of the subject.

2. The head-mounted assembly according to claim 1, characterized in that, The first preset height is 5mm-30mm above the highest point of the orbital bone, and the second preset height is 3mm-35mm below the highest point of the orbital bone.

3. The head-mounted assembly according to claim 1, characterized in that, The headband also includes a pressure section located at the rear. When the headband is worn on the subject's head, the pressure section extends circumferentially across the subject's occipital bone in a natural or stretched state, and the width of the pressure section is not less than 40 mm.

4. The head-mounted assembly according to any one of claims 1-3, characterized in that, The headgear also includes a positioning mechanism connected to the headband and configured to position the headband onto the subject's head.

5. The head-mounted assembly according to claim 4, characterized in that, The headband has a first end and a second end. The positioning mechanism includes a first positioning mechanism, which is configured to allow the first end and the second end to have a connected state and a released state. When the first end and the second end are in the connected state, the headband can be worn on the subject's head. When the first end and the second end are in the released state, the headband can be detached from the subject's head.

6. The head-mounted assembly according to claim 5, characterized in that, The first positioning mechanism includes: The first part is disposed at the first end; and A second portion is disposed at the second end, and the connection or disconnection of the first portion and the second portion causes the first end and the second end to correspondingly have the connected state or the released state, wherein: The ratio between the width of the second end and the width of the first end is in the range of 75%-135%.

7. The head-mounted assembly according to claim 5, characterized in that, The first positioning mechanism includes a rigid member connected between the first end and the second end and extending in a plane containing the first end and the second end. The curvature of the rigid member is adjustable under the action of an external force, so that the first end and the second end have the connected state and the released state.

8. The head-mounted assembly according to claim 4, characterized in that, The positioning mechanism includes a second positioning mechanism configured to connect the headband to the subject's ears and / or chin and / or near-infrared brain functional imaging cap when the headgear is worn on the subject's head.

9. The head-mounted assembly according to any one of claims 1-8, characterized in that, The headband has anti-slip strips on its inner side.

10. The head-mounted assembly according to any one of claims 1-8, characterized in that, The light-shielding section containing near-infrared light-shielding material includes one layer or several layers arranged sequentially from the inside to the outside, wherein at least one layer is light-shielding velvet.

11. A near-infrared brain functional imaging headgear assembly, characterized in that, include: A near-infrared brain imaging headgear, comprising multiple probe mounting portions, including a forehead extension located anterior to the probe mounting portions on the forehead; and... According to any one of claims 1-10, when the near-infrared brain imaging headgear is worn in conjunction with the headgear on the subject's head, the upper edge is circumferentially fitted to the forehead extension of the near-infrared brain imaging headgear in a natural or stretched state, and the lower edge is lower than the forehead extension of the near-infrared brain imaging headgear, such that there is no exposed area between the forehead extension of the near-infrared brain imaging headgear and the light-shielding section of the headband.

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