Double-shot molding rear shell module based on optical micro lens and intelligent wearable equipment

Abstract

The utility model provides a double-color injection molding rear shell module based on an optical micro lens and intelligent wearable equipment, belongs to the technical field of electronics, and aims to solve the problem that in the prior art, when intelligent wearable electronic equipment is used, a Fresnel lens adopted by a blood oxygen detection module and detection light emitted by a light emitter are poor in sensitivity. The problems that in the prior art, human biological characteristics of deep skin cannot be monitored, a blood oxygen detection module is far away from the human skin in a motion scene, detection light cannot detect a target object, and the detection precision is affected are solved, the blood oxygen detection module comprises a rear shell, the rear shell is provided with a containing cavity, a detection assembly is arranged in the containing cavity, and the rear shell is further provided with a plurality of light-transmitting windows; an optical micro lens is embedded in the light-transmitting window, a dot matrix type micro lens structure is integrated on the optical micro lens, and the optical micro lens corresponds to the detection assembly.

Description

Technical Field

[0001] The utility model belongs to the field of electronic technology, and more specifically, particularly relates to a two-color injection molding rear shell module based on optical microlenses and a smart wearable device. Background Art

[0002] With the continuous development of science and technology, electronic devices, such as smart watches, bracelets and other smart wearable devices, are no longer limited to checking time, timing and step counting. As people pay more attention to their own health, smart wearable devices have added physiological monitoring functions such as blood oxygen, heart rate, body fat, ECG (electrocardiogram), etc., so that users can understand their health status at any time, which has brought great convenience to people's lives.

[0003] In existing smart wearable electronic devices, a blood oxygen detection module is usually used to monitor human blood oxygen and heart rate. The blood oxygen detection module generally includes a shell, an optical lens and a monitoring component in the shell. The light emitter on the monitoring component emits detection light to the human skin through the optical lens. The detection light is reflected by the skin tissue and received by the light receiver of the monitoring component, and converted into an electrical signal and then converted into a digital signal by an analog-to-digital converter. The electronic values ​​of blood oxygen and heart rate are calculated based on the digital signal, thereby achieving blood oxygen and heart rate monitoring. However, the Fresnel lens used in the existing blood oxygen detection module can only focus the detection light emitted by the light emitter on the epidermis of the human skin, and cannot monitor the biological characteristics of the deep skin. In addition, the application scenarios of existing smart wearable devices are generally sports scenes. In sports scenes, the blood oxygen detection module will be far away from the human skin. The Fresnel lens focuses the light emitted by the light emitter to form a single focal length detection light that cannot be focused on the human skin. In sports scenes, the blood oxygen detection module is far away from the human skin and its detection light cannot detect the target object, thereby affecting the detection accuracy.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a two-color injection molding back shell module and a smart wearable device based on an optical microlens are provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a two-color injection-molded back shell module and a smart wearable device based on an optical microlens, so as to solve the problem in the prior art that when the smart wearable electronic device is in use, the detection light emitted by the Fresnel lens and the light emitter used in the blood oxygen detection module cannot monitor the human biological characteristics in the deep skin, and in the motion scene, the blood oxygen detection module is far away from the human skin and its detection light cannot detect the target object, thereby affecting the detection accuracy.

[0006] The purpose and effect of the double-color injection molding rear shell module and smart wearable device based on optical microlenses of the utility model are achieved by the following specific technical means:

[0007] A two-color injection-molded back shell module and a smart wearable device based on optical microlenses include a back shell, the back shell is provided with a receiving cavity, a monitoring component is arranged in the receiving cavity, a plurality of light-transmitting windows are also provided on the back shell, an optical microlens is embedded in the light-transmitting window, a dot matrix microlens structure is integrated on the optical microlens, and the optical microlens corresponds to the monitoring component.

[0008] Furthermore, the dot matrix microlens structure includes a plurality of large lenses and small lenses distributed in an array, wherein the large lenses are spread outward in an array in a concentric ring pattern around the center of the optical microlens, the large lenses are arranged at intervals along the concentric ring array, the small lens array is integrated in the area of ​​the optical microlens not covered by the large lens, and the large lenses and the small lenses are arranged in an alternating manner.

[0009] Furthermore, the diameter of the large lens is larger than the diameter of the small lens.

[0010] Furthermore, the monitoring component includes at least one light transmitter and at least one light receiver, the light-transmitting window includes a detection light light-transmitting window and a reflection light light-transmitting window, the detection light light-transmitting window is located at the center of the rear shell, the reflection light light-transmitting window is arranged around the outer circle of the detection light light-transmitting window, the detection light light-transmitting window corresponds to the light transmitter, and the light receiver is arranged corresponding to the reflection light light-transmitting window.

[0011] Furthermore, a forward optical micro-lens is embedded in the detection light transmission window, and a reverse optical micro-lens is embedded in the reflection light transmission window.

[0012] Furthermore, the rear shell and the optical micro-lens are made by a two-color injection molding process, the rear shell is made of ABS plastic or elastic PU glue, and the optical micro-lens is made of polymethyl methacrylate, polystyrene or polycarbonate.

[0013] Furthermore, a transparent layer is coated on the rear shell.

[0014] Another embodiment provides a smart wearable device, including any of the above-mentioned two-color injection-molded rear shell modules based on optical microlenses.

[0015] Compared with the prior art, the utility model has the following beneficial effects.

[0016] By setting an optical microlens on the rear shell module to replace the traditional Fresnel lens, the light emitted by the light emitter on the monitoring component is focused on the optical microlens to form multiple focal points on the projection object, thereby increasing the detection range on the object to be measured and improving the monitoring accuracy of the optical microlens two-color injection rear shell module. At the same time, the large lens and small lens in the dot matrix microlens structure convert the light emitted by the light emitter into detection light with different focal lengths. The detection light with a longer focal length formed by the large lens can irradiate the deep skin of the human body, and the detection light with a shorter focal length formed by the small lens can irradiate the surface skin of the human body. After the reflected light formed by the detection light of the target object is compared and analyzed by the optical receiver on the monitoring component, a more accurate human health value can be obtained, which improves the monitoring accuracy of the two-color injection molded rear shell monitoring module. In addition, in sports scenes, when the two-color injection molded rear shell module is far away from the human skin, if the shorter focal length detection light formed by the small lens cannot detect the human skin, the longer focal length detection light formed by the large lens can also detect the biological health characteristics of the human skin and return it to the optical receiver to form accurate monitoring data, thereby improving the accuracy of blood oxygen monitoring by the two-color injection molded rear shell module in sports scenes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereoscopic diagram of a two-color injection-molded rear shell module based on an optical microlens of the utility model.

[0018] Figure 2 The utility model is a schematic structural diagram of a two-color injection-molded rear shell module based on an optical microlens without a transparent layer.

[0019] Figure 3 It is a plan view of a double-color injection-molded rear shell module based on an optical microlens of the utility model.

[0020] Figure 4 yes Figure 3 A-A cross-sectional view.

[0021] Figure 5 It is an exploded view of a two-color injection-molded rear shell module based on an optical microlens of the utility model.

[0022] Figure 6 This is an exploded view of another angle of view of the double-color injection-molded rear shell module based on the optical microlens of the utility model.

[0023] Figure 7 It is a structural schematic diagram of the optical microlens of the utility model.

[0024] Figure 8 It is a schematic diagram of light passing through an optical microlens of the utility model.

[0025] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0026] 1. Back shell; 2. Accommodating cavity; 3. Monitoring component; 4. Light-transmitting window; 5. Optical microlens; 6. Large lens; 7. Small lens; 8. Light transmitter; 9. Light receiver; 10. Detection light light-transmitting window; 11. Reflection light light-transmitting window; 12. Transparent layer. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example:

[0031] As attached Figure 1 To Attachment Figure 8 As shown:

[0032] The double-color injection molded back shell module and the smart wearable device based on the optical microlens include a back shell 1, the back shell 1 is provided with a receiving cavity 2, a monitoring component 3 is arranged in the receiving cavity 2, the monitoring component 3 is used as a detection light transmitting end and a reflected light receiving and analyzing end of the measured object, a plurality of light-transmitting windows 4 are also provided on the back shell 1, the light-transmitting windows 4 are used as the light channels of the detection light and the reflected light of the measured object, an optical microlens 5 is embedded in the light-transmitting window 4, the optical microlens 5 is used for focusing the light, a dot matrix microlens structure is integrated on the optical microlens 5, and the dot matrix microlens structure on the optical microlens 5 can quickly focus the detection light and the reflected light of the measured object Focusing, the optical microlens 5 corresponds to the monitoring component 3, which is convenient for the monitoring component 3 to efficiently monitor the health characteristics of the object being measured. The optical microlens 5 is made of glass, quartz, germanium, zinc selenide (ZnSe), silicon, K7, calcium fluoride or PMMA and other plastic materials. Specifically, the optical microlens 5 is used to replace the traditional Fresnel lens. The dot matrix microlens structure on the optical microlens 5 can focus the light to form multiple focal points on the projection object, increase the detection range on the object being measured, improve the monitoring accuracy of the optical microlens two-color injection molding rear shell module, and at the same time improve the optical microlens two-color injection molding rear shell module The efficiency of light conversion is improved.

[0033] The dot matrix microlens structure includes a plurality of large lenses 6 and small lenses 7 distributed in an array, the large lenses 6 are spread outward in an array in a concentric ring around the center of the optical microlens 5, the large lenses 6 are arranged at intervals along the concentric ring array, the small lenses 7 are integrated in the area not covered by the large lenses 6 on the optical microlens 5, the large lenses 6 and the small lenses 7 are arranged in an alternating manner, the shapes of the large lenses 6 and the small lenses 7 can be circular, square, rectangular, hexagonal or other shapes specified by the customer, and the large lenses 6 and the small lenses 7 can be arranged in an alternating manner on the optical microlens 5 in an array in a square array, a hexagonal arrangement, a chirped arrangement, a random arrangement or other arrangements;

[0034] Specifically, the large lens 6 and the small lens 7 on the optical microlens 5 focus and convert the light emitted by the monitoring component 3 into detection light with different focal lengths. The large lens 6 forms a detection light with a longer focal length that can irradiate the deep skin of the human body, and the small lens 7 forms a detection light with a shorter focal length that can irradiate the surface skin of the human body. After the reflected light formed by the detection light of different skin layers is compared and analyzed by the monitoring component 3, more accurate human blood oxygen health data can be obtained, thereby improving the monitoring accuracy of the two-color injection molded rear shell monitoring module. In addition, in a sports scene, when the two-color injection molded rear shell module is far away from the human skin, if the shorter focal length detection light formed by the small lens 7 cannot detect the human skin, the longer focal length detection light formed by the large lens 6 can also detect the biological health characteristics of the human skin, and return it to the monitoring component 3 to form accurate monitoring data, thereby improving the accuracy of the two-color injection molded rear shell module in monitoring blood oxygen in a sports scene. It is worth noting that a plurality of large lenses 6 and small lenses 7 arranged in an array will form multiple focal points in different skin surfaces of the human body, thereby further improving the monitoring efficiency and accuracy of the two-color injection molded rear shell module.

[0035] Among them, the diameter of the large lens 6 is larger than the diameter of the small lens 7. The large lens 6 and the small lens 7 with different diameters can form focal points with different focal lengths to focus on the object to be measured. According to customer requirements, the diameters of the large lens 6 and the small lens 7 can be the same, but multiple focal points are formed on the object to be measured to increase the monitoring range and improve the monitoring efficiency and accuracy of the two-color injection molded rear shell module.

[0036] Among them, the monitoring component 3 includes at least one light transmitter 8 and at least one light receiver 9. The light transmitter 8 is used to emit detection light to the object to be measured. The light transmitter 8 emits light suitable for monitoring biological characteristics such as human blood oxygen and heart rate. The light receiver 9 is used to receive light reflected from the object to be measured and convert it into an electrical signal. The light-transmitting window 4 includes a detection light light-transmitting window 10 and a reflected light light-transmitting window 11. The detection light light-transmitting window 10 is located at the center of the rear shell 1, and the reflected light light-transmitting window 11 is arranged around the outer circle of the detection light light-transmitting window 10. The detection light emitting end light-transmitting window 4 is arranged in the center, and the reflected light receiving end light-transmitting windows 4 of the object to be measured are arranged around, which can effectively reduce the energy consumption of the transmitting end of the monitoring component 3 and avoid the heat generation caused by excessive power consumption of the transmitting end of the monitoring component 3. The problem of data processing stability at the receiving end of the monitoring component 3 is solved, thereby improving the accuracy of the monitoring data of the monitoring component 3. It should be noted that the power consumption of the transmitting end of the monitoring component 3 is relatively large, and the power consumption of the receiving end is relatively small and can be ignored. The detection light transparent window 10 corresponds to the light transmitter 8. The detection light transparent window 10 is located downstream of the detection light emitted by the light transmitter 8 to focus the detection light on the object to be measured. The light receiver 9 is set corresponding to the reflected light transparent window 11. The reflected light transparent window 11 is located upstream of the light receiver 9 receiving the reflected light, which can allow the reflected light of the object to be measured to pass through the reflected light transparent window 11 quickly and accurately, and quickly focus the light reflected back from the object to be measured on the light receiver 9, thereby improving the monitoring efficiency of the two-color injection molding rear shell module;

[0037] Specifically, the light emitted by the light transmitter 8 passes through the optical microlens 5 on the detection light transparent window 10, and the detection light is emitted toward the human skin through the optical microlens 5 focusing the light. The detection light passes through the reflected light of the skin tissue and is projected to the light receiver 9 through the focusing of the optical microlens 5. The light receiver 9 converts the received light signal into an electrical signal and then converts it into a digital signal through the analog-to-digital converter on the monitoring component 3. The electronic values ​​of human health characteristics such as blood oxygen and heart rate are calculated based on the digital signal, thereby achieving the monitoring of human health characteristics such as blood oxygen and heart rate by the two-color injection molded back shell module.

[0038] Among them, the detection light transparent window 10 is embedded with a forward optical microlens 5, which adapts to the direction of the light path, so that the forward optical microlens 5 can focus the light emitted by the light emitter 8 and project the detection light onto the skin layer of the object to be measured. The reflected light transparent window 11 is embedded with a reverse optical microlens 5. The reverse optical microlens 5 can well focus the reflected light reflected back by the detection light of the object to be measured, and project the reflected light onto the light receiver 9, so that the detection light and the reflected light are quickly focused and projected, thereby improving the optical coupling efficiency and further improving the monitoring efficiency of the two-color injection molded rear shell module. It should be noted that the optical microlens 5 embedded in the reflected light transparent window 11 can also be a Fresnel lens or other lens that meets the requirements of fast focusing of reflected light.

[0039] Among them, the back shell 1 and the optical microlens 5 are made by a two-color injection molding process. The material of the back shell 1 is ABS plastic or elastic PU glue, and the material of the optical microlens 5 is polymethyl methacrylate, polystyrene or polycarbonate. The back shell 1 uses a light-shielding material, or is coated with a light-shielding ink on the surface to prevent light scattering, so that light can only pass through the light-transmitting window 4, thereby improving the utilization rate of light. The transparent optical microlens 5 is embedded in the light-transmitting window 4 of the back shell 1 and multiple light-transmitting windows 4 are staggered with each other. The back shell 1 is light-shielded and the multiple light-transmitting windows 4 are staggered with each other, which can effectively avoid the problem of light crossover between the detection light light-transmitting window 10 and the reflected light light-transmitting window 11, and further improve the accuracy of the monitoring data of the two-color injection molded back shell module.

[0040] Among them, the back shell 1 is coated with a transparent layer 12. The material used for the transparent layer 12 can be nanomaterials (such as ATO solution, ITO solution, AZO solution, GZO solution) and various resins (such as acrylic resin, polyurethane resin, silicone resin, silicone-acrylic resin, etc.) and other coating additives (such as wetting agent, curing agent, leveling agent, defoaming agent, stabilizer, coupling agent, etc.) and other transparent heat-insulating coatings, which are easy to adhere to human skin and improve the user's comfort experience.

[0041] Another embodiment of the present invention further provides a smart wearable device, comprising any of the above-mentioned two-color injection-molded rear shell modules based on optical microlenses.

[0042] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A two-color injection molding rear shell module based on optical microlenses, characterized in that: include: A rear shell (1), the rear shell (1) being provided with a receiving cavity (2), a monitoring component (3) being arranged in the receiving cavity (2), the rear shell (1) being further provided with a plurality of light-transmitting windows (4), an optical micro-lens (5) being embedded in the light-transmitting window (4), a dot matrix micro-lens structure being integrated on the optical micro-lens (5), and the optical micro-lens (5) corresponding to the monitoring component (3).

2. The double-color injection-molded rear shell module based on optical microlenses according to claim 1, characterized in that: The dot matrix microlens structure comprises a plurality of large lenses (6) and small lenses (7) distributed in an array, wherein the large lenses (6) are arranged around the center of the optical microlens (5) in a concentric ring-like array and spread outward, the large lenses (6) are arranged at intervals along the concentric ring array, the small lens (7) array is integrated in the area of ​​the optical microlens (5) not covered by the large lenses (6), and the large lenses (6) and the small lenses (7) are arranged at intervals.

3. The double-color injection-molded rear shell module based on optical microlenses according to claim 2, characterized in that: The diameter of the large lens (6) is greater than the diameter of the small lens (7).

4. The double-color injection-molded rear shell module based on optical microlenses according to claim 1, characterized in that: The monitoring component (3) comprises at least one light transmitter (8) and at least one light receiver (9); the light-transmitting window (4) comprises a detection light light-transmitting window (10) and a reflection light light-transmitting window (11); the detection light light-transmitting window (10) is located at the center of the rear shell (1); the reflection light light-transmitting window (11) is arranged around the outer ring of the detection light light-transmitting window (10); the detection light light-transmitting window (10) corresponds to the light transmitter (8); and the light receiver (9) is arranged corresponding to the reflection light light-transmitting window (11).

5. The double-color injection-molded rear shell module based on optical microlenses according to claim 4, characterized in that: A positive optical micro-lens (5) is embedded in the detection light transmission window (10), and a negative optical micro-lens (5) is embedded in the reflection light transmission window (11).

6. The double-color injection-molded rear shell module based on optical microlenses according to claim 1, characterized in that: The rear shell (1) and the optical micro-lens (5) are made by a two-color injection molding process; the material of the rear shell (1) is ABS plastic or elastic PU glue; the material of the optical micro-lens (5) is polymethyl methacrylate, polystyrene or polycarbonate.

7. The double-color injection-molded rear shell module based on optical microlenses according to claim 1, characterized in that: The rear shell (1) is coated with a transparent layer (12).

8. A smart wearable device, characterized in that: It comprises a double-color injection-molded rear shell module based on an optical microlens as described in any one of claims 1-7.

Images