Light guide positioning assembly structure

Abstract

The utility model relates to the technical field of jaundice measurement, in particular to a light guide positioning assembly structure. The light guide positioning assembly structure comprises a first reflection light guide column and an emission light guide column which are coaxially connected in a sleeved mode and are sequentially arranged from inside to outside. The emission end of the emission light guide column is separated from the first circuit board by a first preset distance. The receiving end of the first reflection light guide column is separated from the third circuit board by a second preset distance. The setting of the first preset distance and the second preset distance can be used as a reference for positioning and installing the emission light guide column and the first reflection light guide column, so that the assembly consistency between the emission light guide column and the corresponding circuit board and between the first reflection light guide column and the corresponding circuit board is ensured. By accurately controlling the distance between the emission light guide column and the corresponding circuit board and the distance between the first reflection light guide column and the corresponding circuit board, the problem of heat concentration or interference caused by too short distance can be avoided while high-efficiency light transmission is maintained, so that the stability and the reliability of measurement are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to jaundice measurement technical field, especially a light guide positioning assembly structure. BACKGROUND

[0002] With the continuous progress of medical detection technology, as a key link of the health assessment of newborns, the portability, accuracy and cost-effectiveness of the equipment of jaundice measurement are increasingly valued. At present, the jaundice measurement probe mostly uses xenon lamp as the light source, but limited by its high voltage requirement and complex voltage boosting circuit design, not only increases the volume and weight of the device, but also limits the continuous detection capability and integration of the equipment. In addition, although the optical fiber transmission provides flexibility in the light path design, its complex structure layout, uneven distribution of optical fibers and high production cost also restrict the popularization and application of jaundice measurement technology.

[0003] In the prior art, the light guide column technology gradually stands out in the light path design of the jaundice measurement device, gradually replacing the traditional optical fiber bundle transmission mode, but the existing installation structure of the light guide column and the circuit board for jaundice test is complex, lacks accurate positioning installation reference, and the assembly consistency is poor; the distance between the light guide column and the circuit board is not properly set, and the light cannot be uniformly distributed before reaching the circuit board, resulting in uneven light spot, affecting the light source efficiency and color uniformity. UTILITY MODEL CONTENTS

[0004] The utility model discloses in view of the technical problem, such as inaccurate installation and positioning of the light guide column and the circuit board in the prior art, weak light uniformity and large optical signal loss, provides a light guide positioning assembly structure.

[0005] In view of the above technical problems, the utility model embodiment provides a light guide positioning assembly structure, which comprises a first reflective light guide column and an emitting light guide column coaxially connected and arranged from inside to outside in sequence, and a first circuit board, a second circuit board and a third circuit board are sequentially arranged along the length direction of the emitting light guide column.

[0006] The emitting end of the emitting light guide column penetrates the first circuit board and is arranged opposite to the second circuit board, and the emitting end of the emitting light guide column is separated from the second circuit board by a first preset distance.

[0007] The receiving end of the first reflective light guide column penetrates the first circuit board and the second circuit board in sequence and is arranged opposite to the third circuit board, and the receiving end of the first reflective light guide column is separated from the third circuit board by a second preset distance.

[0008] The first preset distance is less than the second preset distance.

[0009] Optionally, a second reflective light guide column is sleeved on the emitting light guide column, the receiving end of the second reflective light guide column is arranged opposite to the first circuit board, and the receiving end of the second reflective light guide column is separated from the first circuit board by a third preset distance, which is smaller than the second preset distance.

[0010] Optionally, the first preset distance is 1.1mm-1.2mm.

[0011] Optionally, the second preset distance is 1.8mm-1.9mm.

[0012] Optionally, the third preset distance is 0.9mm-1.0mm.

[0013] Optionally, a light source assembly is mounted on the second circuit board, the emitting end of the emitting light guide column is arranged corresponding to the light source assembly, and the distance between the light source assembly and the emitting end of the emitting light guide column is smaller than the first preset distance.

[0014] Optionally, the light source assembly comprises a plurality of blue light LFDs, a plurality of green light LEDs and a plurality of red light LEDs which are uniformly and symmetrically arranged on the second circuit board.

[0015] Optionally, a first sensing assembly is mounted on the third circuit board, the receiving end of the first reflective light guide column is arranged corresponding to the first sensing assembly, and the distance between the first sensing assembly and the receiving end of the first reflective light guide column is smaller than the second preset distance; the first sensing assembly comprises a first sensor.

[0016] Optionally, a second sensing assembly is mounted on the first circuit board, the receiving end of the second reflective light guide column is arranged corresponding to the second sensing assembly, and the distance between the second sensing assembly and the second reflective light guide column is smaller than the third preset distance; the second sensing assembly comprises a second sensor and a third sensor.

[0017] Optionally, a probe shell is further included, the probe shell comprises a first shell, a second shell and a third shell which are connected in sequence, two ends of the first circuit board are connected between the inner walls of the opposite sides of the first shell, two ends of the second circuit board are connected between the inner walls of the opposite sides of the second shell, and two ends of the third circuit board are connected between the inner walls of the opposite sides of the third shell.

[0018] Optionally, a silica gel sealing layer is arranged between the first circuit board and the inner wall of the first shell, between the second circuit board and the inner wall of the second shell, and between the third circuit board and the inner wall of the third shell.

[0019] Optionally, a positioning plate is arranged between the second reflective light guide column and the first circuit board, and the first circuit board is fixedly installed on the first housing by pressing the positioning plate through bolts.

[0020] Optionally, the first circuit board, the second circuit board and the third circuit board are connected through a plurality of groups of 5pin pin headers.

[0021] In the utility model, the first preset distance, the second preset distance and the second preset distance can be used as the positioning installation reference of the emitting light guide column and the first reflective light guide column, so that the assembly consistency between the emitting light guide column and the first reflective light guide column and the corresponding circuit boards is ensured. By accurately controlling the distance (i.e. the first preset distance and the second preset distance) between the emitting light guide column and the first reflective light guide column and the corresponding circuit boards, the heat concentration or interference problem caused by too close distance can be avoided while maintaining efficient light transmission, so that the stability and reliability of measurement are improved. The sequential arrangement of the first circuit board, the second circuit board and the third circuit board and the penetrating arrangement of the light guide column also help to reduce the complexity and potential failure points in the system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of the light guide positioning assembly structure of an embodiment of the utility model;

[0023] Figure 2 It is a schematic view of the first preset distance, the second preset distance and the second preset distance distribution of an embodiment of the utility model;

[0024] Figure 3 It is a schematic view of the mounting structure of the light source assembly of an embodiment of the utility model;

[0025] Figure 4 It is a schematic view of the mounting structure of the first circuit board, the second circuit board and the third circuit board of an embodiment of the utility model;

[0026] Figure 5 It is a schematic view of the structure of the probe of an embodiment of the utility model;

[0027] Figure 6 It is a schematic view of the structure of the jaundice detection device including the probe assembly of an embodiment of the utility model.

[0028] 1-probe housing, 101-first housing, 102-second housing, 103-third housing, 2-first circuit board, 3-second circuit board, 4-third circuit board, 5-transmitting light guide column, 6-first reflecting light guide column, 7-second reflecting light guide column, 8-light source assembly, 801-blue light LED, 802-green light LED, 803-red light LED, 9-first sensing assembly, 10-second sensing assembly, 11-positioning plate, 12-5pin pin header, 100-probe assembly, 200-mainboard, 300-power supply part, 400-machine body, 500-matching assembly. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and not used to limit the utility model.

[0030] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only used to facilitate the description of the utility model and simplify the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In an embodiment, as Figure 1 and Figure 2As shown, a light guide positioning assembly structure includes a first reflective light guide column 6 and a transmitting light guide column 5 coaxially connected and arranged from inside to outside, and a first circuit board 2, a second circuit board 3 and a third circuit board 4 are sequentially arranged along the length direction of the transmitting light guide column 5; the transmitting end of the transmitting light guide column 5 penetrates the first circuit board 2 and is arranged opposite to the second circuit board 3, and the transmitting end of the transmitting light guide column 5 is separated from the second circuit board 3 by a first preset distance; the receiving end of the first reflective light guide column 6 penetrates the first circuit board 2 and the second circuit board 3 in sequence and is arranged opposite to the third circuit board 4, and the receiving end of the first reflective light guide column 6 is separated from the third circuit board 4 by a second preset distance; the second preset distance is greater than the first preset distance. Wherein, through the coaxial connection of the first reflective light guide column 6 and the transmitting light guide column 5, the accurate transmission and positioning of light are ensured, the transmitting end of the transmitting light guide column 5 is arranged opposite to the second circuit board 3 and maintains the first preset distance, which helps to reduce the loss of light in the transmission process, while ensuring that the light can be accurately and efficiently transmitted to the target position. The receiving end of the first reflective light guide column 6 penetrates the first and second circuit boards 3 in sequence and is arranged opposite to the third circuit board 4, and maintains the second preset distance, the second preset distance is less than the first preset distance, so that the reflected light can be more effectively received by the third circuit board 4, reducing the light loss caused by too long distance.

[0033] The setting of the first preset distance can ensure that the light is uniformly distributed before reaching the transmitting light guide column 5, and when the light source assembly on the second circuit board 3 emits red, green and blue light separately, it can ensure that the light is uniformly distributed before reaching the transmitting light guide column 5; reducing the unevenness of the light spot while maximizing the efficiency of the light source; especially when the light source assembly 8 contains a red, green and blue three-color LED lamp group, the red, green and blue three-color lamp group, each lamp group emits light separately, the first preset distance helps the light to be uniformly distributed before reaching the transmitting light guide column 5; the red, green and blue three groups of lamps, four red lamps, four blue lamps and four green lamps are arranged, and the three groups of lamps are not lit at the same time, but are lit in turn, because each group of lamps is arranged up and down and left and right, the setting of the first preset distance can reduce the light spot while ensuring the uniformity of the light. In addition, when the transmitting light guide column 5 is working, the LED lamp group will generate heat, the first preset distance provides space for natural convection and radiation heat dissipation of heat, which helps to prevent heat accumulation from adversely affecting the circuit board and other elements.

[0034] The setting of the second preset distance enables the first sensing assembly 9 to effectively receive the reflected light signal, while avoiding the light signal being too strong or saturated due to too close distance, or signal attenuation due to too far distance, thereby helping to maintain the stability of the light signal in the transmission process and reducing signal fluctuations.

[0035] In the above embodiments of the utility model, the first preset distance, the second preset distance and the third preset distance can be used as the reference for positioning and installing the emitting light guide column 5 and the first reflecting light guide column 6, so as to ensure the assembly consistency between the emitting light guide column 5 and the first reflecting light guide column 6 and the corresponding circuit board. By accurately controlling the distance between the emitting light guide column 5 and the first reflecting light guide column 6 and the corresponding circuit board (i.e. the first preset distance and the second preset distance), the heat concentration or interference problem caused by the too close distance can be avoided while maintaining the efficient light transmission, so as to improve the stability and reliability of the measurement. The sequential arrangement of the first circuit board 2, the second circuit board 3 and the third circuit board 4 and the penetrating arrangement of the light guide column also help to reduce the complexity and potential failure points inside the system. By adjusting the size, shape and distance between the emitting light guide column 5 and the first reflecting light guide column 6 and the circuit board, different application scenarios and requirements can also be adapted.

[0036] In an embodiment, as shown in Figure 1 and Figure 2 The light guide positioning and assembling structure further comprises a second reflecting light guide column 7 sleeved on the emitting light guide column 5, the receiving end of the second reflecting light guide column 7 is arranged opposite to the first circuit board 2, and the receiving end of the second reflecting light guide column 7 is separated from the first circuit board 2 by a third preset distance, and the third preset distance is smaller than the second preset distance. Understandably, by sleeving the second reflecting light guide column 7 on the emitting light guide column 5 and arranging a reasonable third preset distance between the receiving end of the second reflecting light guide column 7 and the first circuit board 2, the influence of external interference on the light signal transmission can be reduced to a certain extent, the system can better adapt to complex and variable environmental conditions, and the stable transmission and accurate reception of the light signal can be ensured. The third preset distance is smaller than the second preset distance, because the light signal received by the second reflecting light path is weak, and the shorter distance helps to reduce the loss of the light signal in the transmission process, so that the second sensor (not shown in the figure) and the third sensor (not shown in the figure) of the second sensing assembly can effectively receive the signal even in the case of weak light signal; by adjusting the third preset distance, the response speed and sensitivity of the system to weak light signals can be optimized.

[0037] In another embodiment, when a plurality of second reflecting light guide columns 3 are sleeved on the emitting light guide column 1, that is, a plurality of reflecting light guide columns such as third reflecting light guide columns, fourth reflecting light guide columns, fifth reflecting light guide columns, etc. are sleeved on the second reflecting light guide column 3, the number of the reflecting light guide columns can be set according to the requirements; the smaller the outer diameter and the diameter of the reflecting light guide column, the larger the corresponding preset distance. The third reflecting light guide column, the fourth reflecting light guide column and the fifth reflecting light guide column correspond to the arrangement of the respective circuit boards, and the distances between them are the fourth preset distance, the fifth preset distance and the sixth preset distance respectively, and the second preset distance > the third preset distance > the fourth preset distance > the fifth preset distance > the sixth preset distance.

[0038] In one embodiment, such as Figure 2 As shown, the first preset distance is 1.1mm-1.2mm. Understandably, the first preset distance can be set according to requirements, specifically, according to the light source efficiency, light uniformity, and assembly tolerance. The first preset distance can be 1.1mm or 1.2mm.

[0039] In one embodiment, such as Figure 2 As shown, the second preset distance is 1.8mm-1.gmm. Understandably, the second preset distance can be set according to requirements, specifically, based on the optical signal receiving efficiency and signal stability, the second preset distance can be 1.8mm or 1.gmm.

[0040] In one embodiment, such as Figure 2 As shown, the third preset distance is 0.9 mm to 1.0 mm. Understandably, the third preset distance can be set according to requirements; specifically, it can be set to enhance the reception rate of weak light signals and improve system sensitivity, and can be 0.9 mm or 1.0 mm.

[0041] In one embodiment, such as Figure 2 As shown, the light guide positioning assembly structure also includes a light source assembly 8 mounted on the second circuit board 3. The emitting end of the emitting light guide post 5 is correspondingly arranged with the light source assembly 8, and the distance between the light source assembly 8 and the emitting end of the emitting light guide post 5 is less than the first preset distance. Understandably, since the light source assembly 8 is directly mounted on the second circuit board 3 and closely corresponds to the emitting end of the emitting light guide post 5, the light signal emitted from the light source can quickly and efficiently enter the emitting light guide post 5. The distance between the light source assembly 8 and the emitting end of the emitting light guide post 5 is less than the first preset distance, reducing the loss of the light signal during transmission and improving the light transmission efficiency. Light emitted from 0.4mm can be accurately captured and transmitted by the emitting light guide post 5.

[0042] In one embodiment, such as Figure 2 As shown, the light guide positioning assembly structure also includes a first sensing component 9 mounted on the third circuit board 4. The receiving end of the first reflective light guide post 6 is correspondingly arranged with the first sensing component 9, and the distance between the first sensing component 9 and the receiving end of the first reflective light guide post 6 is less than a second preset distance. The first sensing component 9 includes a first sensor (not shown). Understandably, because the distance between the first sensing component 9 and the receiving end of the first reflective light guide post 6 is relatively short (less than the second preset distance), the attenuation and interference of the light signal during transmission can be reduced, enabling the first sensor to more accurately capture the reflected light signal, which helps to improve the accuracy and precision of signal detection.

[0043] In an embodiment, as shown in Figure 2 The light guide positioning assembly further comprises a second sensing component 10 mounted on the first circuit board 2, the receiving end of the second reflective light guide column 7 is arranged corresponding to the second sensing component 10, and the distance between the second sensing component 10 and the second reflective light guide column 7 is less than a third preset distance. The second sensing component 10 comprises a second sensor (not shown) and a third sensor (not shown). Understandably, since the receiving end of the second reflective light guide column 7 corresponds to the second sensing component 10 closely and the distance is less than the third preset distance, the attenuation and interference of the optical signal in the transmission process are reduced, and the accuracy of signal detection is improved.

[0044] In an embodiment, as shown in Figure 1 In the direction from the emitting end of the emitting light guide column 5 to the exit end of the emitting light guide column 5, the cross-sectional diameter of the emitting light guide column 5 gradually decreases to form a horn-shaped or conical light guide column. In the direction from the emitting end of the first reflective light guide column 6 to the receiving end of the first reflective light guide column 6, the cross-sectional diameter of the first reflective light guide column 6 gradually increases to form a horn-shaped or conical light guide column. In the direction from the emitting end of the second reflective light guide column 7 to the receiving end of the second reflective light guide column 7, the cross-sectional diameter of the second reflective light guide column 7 gradually increases to form a horn-shaped or conical light guide column. In this way, the first reflective light guide column 6, the emitting light guide column 5 and the second reflective light guide column 7 are all arranged in a horn-shaped or conical structure with one end small and the other end large. Not only can it adapt to the layout requirements of multi-layer light paths (layout requirements of sensors and LED light groups), but also can reduce the reflection and scattering loss of light in the transmission process, so that more light can be focused on the detection area. The horn-shaped or conical light guide column can also reduce the interference of external environmental light on the measurement results to a certain extent.

[0045] In an embodiment, as shown in Figure 1As shown, the inner diameter of the exit end section of the emitting light guide column 5 is 3.2 mm, and the outer diameter is 6.3 mm-6.5 mm; the inner diameter of the emitting end section of the emitting light guide column 5 is 4.2 mm, and the outer diameter is 9 mm; the diameter of the emitting end section of the first reflecting light guide column 6 is 2.8 mm-3.2 mm; the diameter of the receiving end section of the first reflecting light guide column 7 is 4.1 mm; the inner diameter of the emitting end section of the second reflecting light guide column 7 is 7.5 mm-7.8 mm, and the outer diameter is 9.7 mm-10 mm. Understandably, the cross-sectional radius of the emitting light guide column 5, the first reflecting light guide column 6, and the second reflecting light guide column 7 near the skin of the to-be-detected person can be set according to the requirements of the structure, optical performance, and application scenarios, and the cross-sectional radii of the first reflecting light guide column 6, the emitting light guide column 5, and the second reflecting light guide column 7 increase in turn; the inner diameter of the exit end section of the emitting light guide column 5 is not greater than 3.2 mm, and the outer diameter is not greater than 6.5 mm, and the reason why the cross-sectional radius of the exit end section of the emitting light guide column 5 should not be too large is mainly to maintain the light intensity and signal quality of the light path collection surface (the skin surface), and a too large cross-sectional radius will make the distance between the light path and the corresponding receiving light path too long, which will increase the attenuation of the light under the skin, making the signal collected by the distal light path weaker, and a suitable cross-sectional radius can reduce the diffusion and attenuation of the light when penetrating the skin, more concentratedly collect reflected light signals, reduce the interference of ambient light on the detection signal, improve the signal-to-noise ratio, and thus ensure the accuracy and reliability of the detection result.

[0046] In an embodiment, as Figure 1As shown, in the direction from the emitting end of the emitting light guide 5 to the emitting end of the emitting light guide 5, the cross-sectional diameter of the emitting light guide 5 gradually decreases; in the direction from the emitting end of the first reflecting light guide 6 to the receiving end of the first reflecting light guide 6, the cross-sectional diameter of the first reflecting light guide 6 gradually increases; and in the direction from the emitting end of the second reflecting light guide 7 to the receiving end of the second reflecting light guide 7, the cross-sectional diameter of the second reflecting light guide 7 gradually increases. The first reflective light guide post 6, the emitting light guide post 5, and the second reflective light guide post 7 are coaxially connected from the inside out, ensuring precise alignment of the light source and the receiving light while forming three independent channels for light propagation to avoid interference between light paths. The emitting light guide post 5 transmits light of a specific wavelength emitted by the light source assembly 8 to the skin surface. The first reflective light guide post 6 and the second reflective light guide post 7 receive the light reflected, scattered, and refracted by the subcutaneous tissue of the skin. These signals are converted into electrical signals by the first sensing component 9 and the second sensing component 10. The concentration of bilirubin is calculated by measuring the intensity and wavelength of the light reflected back from the first reflective light guide post 6 and the second reflective light guide post 7 using these electrical signals. Due to bilirubin deposition, the presence of jaundice is determined based on changes in the spectrum of skin reflection. The number of second reflective light guide posts 7 can be set to multiple as needed, with multiple second reflective light guide posts 7 sequentially connected to the emitting light guide post 5 to counteract the influence of skin melanin. The first reflective light guide post 6 is used to detect jaundice levels.

[0047] Furthermore, the first reflective light guide post 6, the emitting light guide post 5, and the second reflective light guide post 7 can all be injection molded from transparent acrylic materials such as PMMA, polycarbonate, and epoxy resin, giving the three light guide posts excellent light transmission performance and stable physical properties. This ensures that the light signal will not be significantly attenuated due to material absorption or scattering during transmission, thereby improving the accuracy and precision of jaundice detection.

[0048] In one embodiment, such as Figure 1 As shown, the outer surfaces of the emitting light guide 5, the first reflecting light guide 6, and the second reflecting light guide 7 are all provided with an electroplated layer. Understandably, the electroplated layer isolates the first reflecting light path, the emitting light path, and the second reflecting light path, further preventing interference between the light paths. Each light path can propagate independently, ensuring the stability and accuracy of the optical signal. The electroplated layer also provides a protective layer for the surface of the light guide, preventing it from being corroded and damaged by the external environment.

[0049] In one embodiment, such as Figure 1As shown, a metal ring (not shown in the figure) is sleeved between the emitting light guide column 5 and the second reflecting light guide column 7. Understandably, the metal ring can be a copper ring. The metal ring can increase the distance of the emitting light path to the second reflecting light path (long light path), and the increased distance is the thickness of the metal ring. Thus, the path length and attenuation characteristics of the light during propagation can be changed, and thus the intensity and quality of the final received light signal can be affected. By mixing the signals of the first reflecting light path (short light path) and the second reflecting light path (long light path), the different absorption characteristics of the two paths to different components (such as bilirubin and melanin) when penetrating the skin are utilized, and the influence of melanin on the measurement results can be effectively removed or reduced.

[0050] Further, by adjusting the thickness of the metal ring, the length of the second reflecting light path can be accurately controlled, and the accuracy of the entire optical measurement system can be optimized.

[0051] In an embodiment, as shown in Figure 1 and Figure 3 The light source assembly 8 includes a plurality of blue light LEDs 801, a plurality of green light LEDs 802, and a plurality of red light LEDs 803 symmetrically arranged on the second circuit board 3. Understandably, the second circuit board 3 is arranged opposite to the emitting end of the emitting light guide column 5, that is, the plurality of blue light LEDs 801, the plurality of green light LEDs 802, and the plurality of red light LEDs 803 of the light source assembly 8 are arranged opposite to the emitting end of the emitting light guide column 5, so that the light emitted by the light source assembly 8 can directly irradiate the emitting end of the emitting light guide column 5, reducing the loss and scattering of the light during propagation. The light emitting direction of the light source assembly 8 is perpendicular to the emitting end of the emitting light guide column 5, which helps to reduce the angle deviation of the light when it enters, improves the efficiency of the light entering the emitting light guide column 5, and promotes the uniform distribution of the light intensity at the emitting end.

[0052] In an embodiment, as shown in Figure 1 There is a certain distance between the emitting end of the emitting light guide column 5 and the lamp beads of the LEDs of the light source assembly, which enhances the uniformity of the red, green, and blue light. If the distance between the red, green, and blue lamp beads is too close, the intensity is good, but the uniformity is not good. By maintaining a certain distance, the emitting light intensity can be ensured, and the uniformity of the emitting light can be enhanced.

[0053] In an embodiment, as shown in Figure 2As shown, the number of blue LEDs 801 and green LEDs 802 are the same, and they are grouped in pairs to form a light source unit. All the light source units are evenly arranged along the mounting holes. The plurality of red LEDs 803 are arranged at intervals between adjacent light source units. In essence, one blue LED 801 and one green LED 802 constitute a light source unit, and the plurality of light source units are evenly arranged on the second circuit board 3 relative to the mounting holes, with a red LED 803 arranged between adjacent light source units. Thus, the green LED 802 and blue LED 801 are closely adjacent and evenly distributed in the four directions of top, bottom, left, and right on the second circuit board 3, while the red LED 803 is distributed in the four directions of northeast, northwest, southwest, and southeast on the second circuit board 3. This arrangement increases the mixing effect of the light, making the light entering the emitting light guide column 5 more uniform in color and avoiding visual errors caused by uneven color distribution. At the same time, it also considers the uniformity of light, ensuring the uniform light effect, so that the light intensity on the emitting end cross section of the emitting light guide column 5 is uniform, reducing the difference in reflected light intensity signal caused by uneven light intensity. It also takes into account color balance. Red light has a high saturation in visual perception. Through reasonable distribution, it can avoid local over-brightness or under-brightness, and improve the overall detection accuracy.

[0054] Furthermore, by alternately lighting a 460nm blue LED 801 and a 550nm green LED 802, and considering that hemoglobin has the same absorption peak at 460nm blue light and 550nm green light, while bilirubin has the strongest absorption peak at 460nm blue light, the bilirubin content in subcutaneous tissue is determined by measuring the difference in optical intensity between blue and green light. A 630nm red LED is primarily used to assist in addressing the influence of skin melanin on the measurement accuracy of 460nm blue light and 550nm green light, thus improving the accuracy of bilirubin measurement. The red LED 803 is lit when the blue LED 801 and the green LED 802 are off. Understandably, bilirubin has the strongest absorption peak at a wavelength of 460nm. When blue light shines on the skin, most of the blue light is absorbed by bilirubin in the subcutaneous tissue. The degree of absorption is directly related to the bilirubin content. By measuring the change in the intensity of blue light before and after irradiation, the amount of bilirubin absorbed by blue light can be indirectly calculated, and thus the bilirubin content can be assessed.

[0055] Hemoglobin has similar absorption peaks at wavelengths of 460nm (blue light) and 550nm (green light), but bilirubin absorbs much less at wavelengths of 550nm (green light) than at wavelengths of blue light. Therefore, green light can be used as a reference to help correct measurement errors caused by the absorption of other substances such as hemoglobin.

[0056] When skin is irradiated with 630nm red light, melanin in the skin absorbs red light. Bilirubin and hemoglobin absorb less 630nm red light, while melanin absorbs some 460nm blue light and 550nm red light, which can affect the measurement accuracy.

[0057] In one embodiment, such as Figure 3 As shown, the number of blue LED 801, green LED 802, and red LED 803 is at least four. Understandably, the number of blue LED 801, green LED 802, and red LED 803 can be set according to requirements, and can be four for each. Understandably, even if one of the LEDs fails or its performance degrades, the other LEDs can continue to work, ensuring the continuity and stability of the measurement. If only one blue LED 801 or one green LED 802 is used, if one of them fails, the accuracy of the detection may be significantly reduced, potentially leading to extremely serious consequences.

[0058] In one embodiment, such as Figure 1 As shown, the first circuit board 2, the second circuit board 3, and the third circuit board 4 are sequentially connected along the length of the probe housing 1, dividing the receiving cavity into a first mounting cavity, a second mounting cavity, and a third mounting cavity. A first reflective light guide post 6, a emitting light guide post 5, and a second reflective light guide post 7 are coaxially sleeved within the probe housing 1 and sequentially arranged from the inside out. The receiving end of the second reflective light guide post 7 is located below the first circuit board 2 and outside the first mounting cavity. The emitting end of the emitting light guide post 5 passes through the first circuit board 2 and is located within the first mounting cavity, with the emitting end of the emitting light guide post 5 facing the second circuit board 3. The receiving end of the first reflective light guide post 6 passes through the first circuit board 2 and the second circuit board 3 and is located within the second mounting cavity, with the receiving end of the first reflective light guide post 6 facing the third circuit board 4. The first circuit board 2, the second circuit board 3, and the third circuit board 4 are sequentially installed along the length of the probe housing 1, dividing the housing into three independent mounting cavities, namely the first mounting cavity, the second mounting cavity, and the third mounting cavity. The receiving end of the first reflective light guide post 6 is located in the second mounting cavity, and the emitting end of the emitting light guide post 5 passes through the first circuit board 2 and is located in the first mounting cavity. The emitting light guide post 5 and the first reflective light guide post 6 are installed in different mounting cavities, realizing the physical isolation between the optical path and the circuit board.

[0059] In one embodiment, such as Figure 1As shown, the device also includes a probe housing 1, which comprises a first housing 101, a second housing 102, and a third housing 103 connected in sequence. The two ends of the first circuit board 2 are connected between the inner walls of opposite sides of the first housing 101; the two ends of the second circuit board 3 are connected between the inner walls of opposite sides of the second housing 102; and the two ends of the third circuit board 4 are connected between the inner walls of opposite sides of the third housing 103. Understandably, the first housing 101 forms a first mounting cavity, the second housing 102 forms a second mounting cavity, and the third housing 103 forms a third mounting cavity. The first housing 101, the second housing 102, and the third housing 103 constitute the probe housing 1, which can protect the circuit boards and optical components. The split-type design of the probe housing 1 facilitates maintenance and replacement and also helps to clearly distinguish its functions.

[0060] In one embodiment, such as Figure 1 As shown, silicone sealing layers (not shown) are provided between the first circuit board 2 and the inner wall of the first housing 101, between the second circuit board 3 and the inner wall of the second housing 102, and between the third circuit board 4 and the inner wall of the third housing 103. Understandably, the silicone sealing layer can effectively absorb light, reducing or eliminating light leakage caused by assembly gaps; it not only effectively prevents light leakage from structural component assembly gaps but also improves sealing performance, shock absorption and cushioning capabilities, aesthetics, and ease of maintenance.

[0061] In one embodiment, such as Figure 1 and Figure 5 As shown, the light guide positioning assembly structure also includes a positioning plate 11 disposed between the second reflective light guide post 7 and the first circuit board 2. The first circuit board 2 presses the positioning plate 11 and is fixedly mounted on the first housing 101 by bolts. Understandably, the positioning plate 11 effectively blocks some of the excess reflected light, and together with the first circuit board 2, it can further prevent these lights from entering the cavity where the first circuit board 2 is located, thereby reducing light interference.

[0062] In one embodiment, such as Figure 1 and Figure 5 As shown, the second reflective light guide post 7 also includes two protrusions (not shown) symmetrically arranged at the receiving end of the second reflective light guide post 7. The positioning plate 11 is provided with positioning holes (not shown) that are adapted to the protrusions. The positioning holes on the positioning plate 11 that are adapted to the protrusions ensure that the protrusions are accurately positioned on the positioning plate 11, avoiding optical path offset due to installation errors. The protrusions can also accurately guide the reflected light to the corresponding second sensing component 10. The two symmetrically arranged protrusions help maintain the symmetry of the optical path, making the intensity of the light signal received by the second sensing component 10 more uniform.

[0063] In one embodiment, the second sensing component 10 includes a second sensor and a third sensor. To meet the installation requirements of the second and third sensors (whose layout is strictly limited by their dimensions and circuit pad packaging), and to simultaneously avoid the problem of increased probe thickness caused by placing the second and third sensors vertically, the second and third sensors are arranged horizontally. This effectively controls the probe thickness, keeping it within a relatively reasonable and aesthetically pleasing range. To accommodate the above layout, the outer contour of the receiving end of the second reflective light guide post 7 can be designed as an ellipse, which not only meets the installation requirements but also optimizes the optical path to a certain extent, improving the utilization rate of light.

[0064] In another embodiment, the protrusion is disposed opposite to the second or third sensor, and the center of the protrusion is directly opposite to the center of the acquisition window of the second or third sensor. The cross-sectional area of ​​the protrusion is larger than the cross-sectional area of ​​the acquisition window (light-receiving window) of the second or third sensor. Understandably, the relative arrangement of the protrusion and the area difference design allow reflected light to enter the acquisition window directly and efficiently. The protrusion with a larger cross-sectional area can capture more reflected light and guide it to the acquisition window, which not only increases the receiving area of ​​the light signal and reduces light scattering and loss, but also improves the sensor's sensitivity and receiving capability for light signals.

[0065] In one embodiment, such as Figure 4 As shown, the first circuit board 2, the second circuit board 3, and the third circuit board 4 are connected by soldering with several sets of 5-pin headers 12. Understandably, using several sets of 5-pin headers 12 to connect the third circuit board 4, the second circuit board 3, and the first circuit board 2 offers multiple advantages. First, the solder joints firmly fix these three circuit boards together, forming a stable whole, effectively resisting the influence of external factors such as vibration and impact on the stability of the circuit board connection, and preventing loosening or separation. Second, this soldering connection method ensures reliable transmission of electrical signals between the circuit boards. Each set of 5-pin headers 12 is precisely connected to the corresponding pad, forming a low-impedance, high-stability electrical path, ensuring the integrity and accuracy of signals between the circuit boards. Furthermore, using 5-pin headers 12 for circuit board connection significantly simplifies the assembly process and improves production efficiency. The design of the 5-pin headers 12 makes the alignment between circuit boards intuitive and easy to operate, reducing the complexity and human error in the assembly process, while also shortening assembly time and improving overall work efficiency.

[0066] In one embodiment, a light-blocking ring (not shown) is also provided on the second housing 102, and the light-blocking ring is arranged around the emitting end of the emitting light guide column 5. Understandably, the light-blocking ring can limit or block the light emitted from the emitting light guide column 5 from scattering in an unintended direction, so that the light propagates in a set direction, thereby improving the utilization rate of light and the overall performance of the device.

[0067] This utility model also provides a jaundice detection device, including the aforementioned probe assembly. The jaundice detection device includes a body 400, a probe assembly 100, a main board 200, a power supply unit 300, and supporting components 500. The probe assembly 100 includes the aforementioned probe assembly. The device integrates the body 400 as the main frame and the probe assembly 100 as the core component, directly acting on the skin being tested. By emitting and receiving light, it efficiently converts the light signal into an electrical signal using a photoelectric sensor. These electrical signals can be further processed on the main board 200 to accurately analyze jaundice indicators, or they can be pre-processed on the probe and directly transmitted to the main board 200, ensuring efficient and accurate data processing. The main board 200 is responsible for integrating and analyzing these signals, generating intuitive detection data that can be displayed on a screen for user viewing. Furthermore, the jaundice detection device has a built-in power supply unit 300 to ensure a continuous and stable power supply for the entire device. To ensure measurement accuracy, the supporting components 500 provide calibration devices, facilitating regular calibration and maintenance of the device and ensuring the reliability and accuracy of the detection results.

[0068] The above are merely embodiments of the light-guiding positioning assembly structure and jaundice detection device of this utility model, and are not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A light guide positioning assembly structure, characterized in that, It includes a first reflective light guide post (6) and a emitting light guide post (5) that are coaxially connected and arranged sequentially from the inside to the outside. A first circuit board (2), a second circuit board (3) and a third circuit board (4) are arranged sequentially along the length direction of the emitting light guide post (5). The emitting end of the light-emitting column (5) passes through the first circuit board (2) and is positioned opposite to the second circuit board (3), and the emitting end of the light-emitting column (5) and the second circuit board (3) are separated by a first preset distance; The receiving end of the first reflective light guide column (6) passes through the first circuit board (2) and the second circuit board (3) in sequence and is positioned opposite to the third circuit board (4), and the receiving end of the first reflective light guide column (6) is separated from the third circuit board (4) by a second preset distance; The first preset distance is less than the second preset distance.

2. The light guide positioning assembly structure according to claim 1, characterized in that, It also includes a second reflective light guide (7) sleeved on the emitting light guide (5), the receiving end of the second reflective light guide (7) being disposed opposite to the first circuit board (2), and the receiving end of the second reflective light guide (7) being separated from the first circuit board (2) by a third preset distance, the third preset distance being less than the second preset distance.

3. The light guide positioning assembly structure according to claim 1, characterized in that, The first preset distance is 1.1mm-1.2mm.

4. The light guide positioning assembly structure according to claim 1, characterized in that, The second preset distance is 1.8mm-1.9mm.

5. The light guide positioning assembly structure according to claim 2, characterized in that, The third preset distance is 0.9mm-1.0mm.

6. The light guide positioning assembly structure according to claim 5, characterized in that, It also includes a light source assembly (8) mounted on a second circuit board (3), the emitting end of the light guide column (5) is correspondingly arranged with the light source assembly (8), and the distance between the light source assembly (8) and the emitting end of the light guide column (5) is less than the first preset distance.

7. The light guide positioning assembly structure according to claim 6, characterized in that, The light source assembly (8) includes a plurality of blue LEDs (801), a plurality of green LEDs (802) and a plurality of red LEDs (803) uniformly and symmetrically arranged on the second circuit board (3).

8. The light guide positioning assembly structure according to claim 5, characterized in that, It also includes a first sensing component (9) mounted on a third circuit board (4), the receiving end of the first reflective light guide column (6) is correspondingly set with the first sensing component (9), and the distance between the first sensing component (9) and the receiving end of the first reflective light guide column (6) is less than a second preset distance; the first sensing component (9) includes a first sensor.

9. The light guide positioning assembly structure according to claim 5, characterized in that, It also includes a second sensing component (10) mounted on the first circuit board (2), the receiving end of the second reflective light guide column (7) is correspondingly set with the second sensing component (10), and the distance between the second sensing component (10) and the second reflective light guide column (7) is less than a third preset distance; the second sensing component (10) includes a second sensor and a third sensor.

10. The light guide positioning assembly structure according to claim 2, characterized in that, It also includes a probe housing (1), which includes a first housing (101), a second housing (102) and a third housing (103) connected in sequence. The two ends of the first circuit board (2) are connected between the inner walls of the opposite sides of the first housing (101); the two ends of the second circuit board (3) are connected between the inner walls of the opposite sides of the second housing (102); and the two ends of the third circuit board (4) are connected between the inner walls of the opposite sides of the third housing (103).

11. The light guide positioning assembly structure according to claim 10, characterized in that, A silicone sealing layer is provided between the first circuit board (2) and the inner wall of the first housing (101), between the second circuit board (3) and the inner wall of the second housing (102), and between the third circuit board (4) and the inner wall of the third housing (103).

12. The light guide positioning assembly structure according to claim 10, characterized in that, It also includes a positioning plate (11) disposed between the second reflective light guide post (7) and the first circuit board (2), wherein the first circuit board (2) presses the positioning plate (11) and is fixedly installed on the first housing (101) by bolts.

13. The light guide positioning assembly structure according to claim 12, characterized in that, The first circuit board (2), the second circuit board (3) and the third circuit board (4) are connected by several sets of 5-pin headers (12).

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