A blood oxygen sensor

Abstract

The present invention relates to the field of sensor technology, and provides a blood oxygen sensor, comprising a circuit board, an optical device electrically connected to the circuit board for detecting the blood oxygen saturation of a patient, a connector electrically connected to the circuit board, and a cable connected to the connector, wherein the optical device and the connector respectively comprise an electrical connection part, and the electrical connection part is surface mounted to the flexible circuit board; the blood oxygen sensor provided by the present invention has a connector connected to the optical device, and the cable is electrically connected to the optical device through the connector, and the contact reliability is high and short circuit is not easy to occur, and the step of welding in the process of connecting the cable and the connector is eliminated, thereby further saving working procedures and improving processing efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of sensors, and in particular relates to a blood oxygen sensor. Background Art

[0002] Most of the existing manufacturing processes of disposable blood oxygen sensors use manual welding of optical components and connecting wires, and manual bonding of the upper tape that contacts the patient's skin and the inner tape that serves as an isolation layer. The manufacturing process has the following disadvantages: 1. The structure of the welding assembly is loose and has poor consistency, which is not conducive to automated production; 2. Manual assembly is complex and has high labor costs. Summary of the invention

[0003] The object of the present invention is to provide a blood oxygen sensor to solve the problems of loose structure and poor consistency of the blood oxygen sensor in the prior art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a blood oxygen sensor, including a circuit board, an optical device electrically connected to the circuit board for detecting the patient's blood oxygen saturation, a connector electrically connected to the circuit board and a cable connected to the connector, the optical device and the connector respectively include an electrical connection part, and the electrical connection part is surface-mounted to the circuit board.

[0005] Furthermore, the connector includes a plurality of spaced connection terminals and a fixing joint disposed at the top of the connection terminals and used to fix the plurality of connection terminals, and the connection terminals include a connection body electrically connected to the circuit board and a fixing member disposed on the connection body and used to fix the cable.

[0006] Furthermore, the connector is an integrated piece.

[0007] Furthermore, the circuit board includes a circuit board body, a first substrate arranged at one end of the circuit board body, and a second substrate arranged at the other end of the circuit board body; the optical device includes a transmitting optical element arranged on the first substrate and a receiving optical element arranged on the second substrate; the transmitting optical element is configured to transmit an optical signal to the receiving optical element.

[0008] Furthermore, the circuit board is a flexible circuit board.

[0009] Furthermore, the fixing member includes two fixing claws symmetrically arranged with respect to the axis of the connecting body, a space for accommodating the cable is formed between the two fixing claws, and an opening for the cable to enter is formed between the top ends of the two fixing claws.

[0010] Furthermore, the first substrate comprises a first containing groove for containing the emitting optical element and a light-transmitting film arranged at the bottom of the first containing groove, and the emitting surface of the emitting optical element faces the light-transmitting film.

[0011] Furthermore, the second substrate comprises a second accommodating groove for accommodating the receiving optical element and a light-transmitting hole arranged at the bottom of the second accommodating groove, and the receiving surface of the receiving optical element faces the light-transmitting hole.

[0012] Furthermore, the emitting optical element emits red light and infrared light.

[0013] Furthermore, the receiving optical element body receives the red light and infrared light emitted by the emitting optical element.

[0014] Furthermore, it also includes: a sealing member, wherein the sealing member covers the electrical connection portion between the optical device and the circuit board.

[0015] Furthermore, it also includes: the sealing component is an epoxy resin component.

[0016] Furthermore, the emitting optical element includes an emitting optical body and two first pins electrically connected to the emitting optical body; the first pins are electrically connected to the circuit board and are wrapped by the sealing member.

[0017] Furthermore, the receiving optical element includes a receiving optical body and two second pins electrically connected to the receiving optical body; the second pins are electrically connected to the circuit board and are wrapped by the sealing member.

[0018] Furthermore, it also includes: a sealing member, wherein the sealing member covers the electrical connection portion between the connecting terminal and the circuit board.

[0019] Furthermore, the sealing component is an epoxy resin component.

[0020] Furthermore, a first pearlescent film is provided on the bottom surface of the flexible circuit board.

[0021] Furthermore, an adhesive film is attached to the bottom surface of the first pearlescent film.

[0022] Furthermore, a release film is attached to the bottom surface of the adhesive film.

[0023] Furthermore, two layers of double-sided adhesive films are arranged on the top surface of the flexible circuit board, a second pearl film is arranged between the two layers of double-sided adhesive films, and the double-sided adhesive film is adhered to the first pearl film and the adhesive film to wrap the flexible circuit board.

[0024] Furthermore, a tape is provided on the top surface of the double-sided adhesive film.

[0025] Another object of the present invention is to provide a disposable blood oxygen sensor suitable for automated assembly, comprising a support member and the above-mentioned blood oxygen sensor; the support member is a multi-layer structure; and the blood oxygen sensor is fixedly arranged between the multiple layer structures.

[0026] Furthermore, the adjacent layer structures are discontinuous.

[0027] The beneficial effects of the blood oxygen sensor provided by the present invention are:

[0028] By setting the circuit board, the blood oxygen sensor can be easily wrapped around the patient's finger; and the circuit board has high reliability and can be used to set an optical device for detecting blood oxygen saturation. The optical device set on the circuit board is accurately positioned and easy to process; by setting a connector connected to the optical device, the cable is electrically connected to the optical device through the connector, and the contact reliability is high and short circuit is not easy to occur, and the step of welding during the connection between the cable and the connector is eliminated, which saves working procedures and improves processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional structural diagram of a blood oxygen sensor provided by an embodiment of the present invention;

[0030] Figure 2 is an exploded view of the three-dimensional structure of the blood oxygen sensor provided by an embodiment of the present invention;

[0031] Figure 3 is a top view of a blood oxygen sensor provided by an embodiment of the present invention;

[0032] Figure 4 It is an exploded view of the three-dimensional structure of the blood oxygen sensor provided by an embodiment of the present invention.

[0033] The reference numerals in the figures are:

[0034] Circuit Board 1 Light-transmitting film 112 Connect the main body 311 Optics 2 Second accommodating groove 121 Fixings 312 Connectors 3 Light hole 122 Fixed claw 3121 cable 4 Transmitting optics 21 The first pearlescent film 71 Epoxy resin 5 Receiving optics 22 Adhesive film 72 plug 6 Transmitting optical body 211 Release film 73 Circuit board body 10 First Pin 212 Double-sided adhesive film 74 First substrate 11 Receiving optical body 221 Second pearl film 75 Second substrate 12 Second pin 222 perforation 711 Protection board 13 Connection Terminals 31 First receiving groove 111 Fixed joint 32 DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The specific implementation of the present invention is described in more detail below in conjunction with specific embodiments:

[0039] Figures 1 to 3 A blood oxygen sensor provided by an embodiment of the present invention is shown.

[0040] like Figure 1 and Figure 2 A blood oxygen sensor provided by an embodiment of the present invention comprises a strip-shaped circuit board 1 for wrapping around a patient's finger, an optical device 2 for detecting the patient's blood oxygen saturation, which is arranged at both ends of the circuit board 1 and electrically connected to the circuit board 1, a connector 3 arranged on the circuit board 1 and connected to the optical device 2, and a cable 4 connected to the connector 3, wherein the optical device 2 and the connector 3 respectively comprise an electrical connection part, and the electrical connection part is soldered to the circuit board 1 using surface mounting technology,

[0041] The blood oxygen sensor of this embodiment has the following technical effects:

[0042] The blood oxygen sensor includes a long strip-shaped circuit board 1, which is flexible and has good bendability. By setting the circuit board 1, the blood oxygen sensor can be easily wrapped around the patient's finger; and the circuit board 1 has high reliability and can be used to set an optical device 2 for detecting blood oxygen saturation. The optical device 2 set on the circuit board 1 is accurately positioned and easy to process; by setting a connector 3 connected to the optical device 2, the cable 4 is electrically connected to the optical device 2 through the connector 3, and the contact reliability is high and short circuit is not easy to occur, and the step of welding during the connection between the cable 4 and the connector 3 is eliminated, which saves working procedures and improves processing efficiency.

[0043] Specifically, the connector 3 includes a plurality of connection terminals 31 that are parallel to each other and arranged at intervals, and a fixing joint 32 that is arranged at the top of the connection terminal 31 and is used to fix the plurality of connection terminals 31. The connection terminal 31 includes a connection body 311 connected to the circuit board 1 and a fixing part 312 that is arranged on the connection body 311 and is used to fix the cable 4.

[0044] By arranging the connecting terminals 31 parallel to each other and at intervals, when processing the cable 4 onto the connecting terminal 31, an automated assembly method can be used to process multiple cables 4 onto the corresponding connecting terminals 31 at one time, thereby improving processing efficiency; when the cable 4 is fixed on the connecting terminal 31, it is connected to the connecting terminal 31, and by providing the fixing member 312, the need to use welding to fix the cable 4 and the connecting terminal 31 during the processing is eliminated, thereby reducing the welding steps, saving material costs and improving processing efficiency. In addition, during the processing, the connecting terminals 31 are very close to each other, and welding can easily cause a short circuit in adjacent connecting terminals 31, resulting in the scrapping of the blood oxygen sensor. Therefore, the defective rate of the product is reduced by providing the fixing member 312.

[0045] Specifically, the circuit board 1 is a flexible circuit board.

[0046] Specifically, the connector 3 is an integrated piece.

[0047] Specifically, the optical device 2 and the connector 3 are both soldered to the circuit board 1 by using the surface mount technology (SMT), and the cable 4 is connected to the circuit board 1 by using the automatic clamping method through the connector 3. The components mounted by the SMT process have a compact structure and can be modularized. Their high consistency is conducive to automated production, and the automated assembly has a simple process and low labor cost.

[0048] Furthermore, if Figure 2The circuit board 1 includes a circuit board body 10, a first substrate 11 arranged at one end of the circuit board body 10, and a second substrate 12 arranged at the other end of the circuit board body 10; the optical device 2 includes an emitting optical element 21 arranged on the first substrate 11 and a receiving optical element 22 arranged on the second substrate 12; the emitting optical element 21 is configured to emit a light signal to the receiving optical element 22. Preferably, when the circuit board 1 is wrapped around the patient's finger, the emitting optical element 21 is directly opposite to the receiving optical element 22. Among them, the emitting optical element 21 includes a red light emitting tube with a wavelength of 660nm or 650nm and an infrared light emitting tube with a wavelength of 940nm or 910nm, and the receiving optical element 22 is a photosensitive receiving device, most of which adopt a PIN-type photosensitive diode with a large receiving area, high sensitivity, small dark current and low noise, which converts the received incident light signal into an electrical signal. When in use, the blood oxygen sensor can be put on the fingertip, the transmitting optical element 21 and the receiving optical element 22 are directly opposite each other with the fingertip between them, and the receiving optical element 22 receives the red light and infrared light emitted by the transmitting optical element 21 and transmitted through the finger and converts them into electrical signals. When the blood oxygen sensor is in operation, the time-sharing driving circuit allows the two light-emitting diodes to emit light at a certain time interval and at a low duty cycle. The whole blood absorption rate can be calculated based on the light intensity and the intensity ratio of the red light and infrared light received by the receiving optical element 22, and then the coefficients calibrated by the experiment are substituted into the corresponding formula to calculate the value of blood oxygen saturation.

[0049] Furthermore, the transmitting optical element 21 and the receiving optical element 22 are connected to a plurality of connection terminals 31 , respectively.

[0050] Furthermore, the fixing member 312 includes two fixing claws 3121 symmetrically arranged with respect to the axis of the connecting body 311, a space for accommodating the cable 4 is formed between the two fixing claws 3121, and an opening for the cable 4 to enter is formed between the top ends of the two fixing claws 3121. During processing, a plurality of cables 4 are inserted between the two fixing claws 3121 through the opening, and the fixing claws 3121 fix the cables 4 on the connecting body 311, so that the cables 4 are connected to the connecting body 311.

[0051] Furthermore, the fixing claws 3121 are flexible parts. After the cable 4 is inserted between the two fixing claws 3121, the fixing claws 3121 are automatically clamped to retract toward the central axis direction of the fixing member 312, and the cable 4 is firmly fixed between the fixing claws 3121 to prevent the cable 4 from falling out and causing poor contact.

[0052] Furthermore, the transmitting optical element 21 includes a transmitting optical body 211 and two first pins 212 arranged on the side of the transmitting optical body 211, and the first pins 212 are connected to the connecting body 311. The receiving optical element 22 includes a receiving optical body 221 and two second pins 222 arranged on the side of the receiving optical body 221, and the second pins 222 are connected to the connecting body 311.

[0053] Furthermore, the first substrate 11 includes a first receiving groove 111 for receiving the emitting optical body 211 and a light-transmitting film 112 disposed at the bottom of the first receiving groove 111, and the emitting surface of the emitting optical body 211 faces the light-transmitting film 112. By providing the first receiving groove 111, positioning during surface mounting is facilitated. The bottom of the first receiving groove 111 is provided with the light-transmitting film 112. The light emitted by the emitting optical body 211 is emitted from the emitting surface and is emitted to the receiving optical element 22 through the light-transmitting film 112. By providing the light-transmitting film 112, excessive loss of the light emitted by the emitting optical body 211 during the transmission process is avoided to affect the test results.

[0054] Furthermore, the second substrate 12 includes a second accommodating groove 121 for accommodating the receiving optical body 221 and a light-transmitting hole 122 arranged at the bottom of the second accommodating groove 121, and the receiving surface of the receiving optical body 221 faces the light-transmitting hole 122. Similarly, by providing the second accommodating groove 121, positioning during surface mounting is facilitated, and the light-transmitting hole 122 is provided at the bottom of the second accommodating groove 121 to prevent the light emitted by the transmitting optical body 211 from being blocked during the transmission process, thereby avoiding excessive loss, affecting the receiving effect, and causing inaccurate test results.

[0055] Further, the emitting optical body 211 emits red light and infrared light.

[0056] Furthermore, the receiving optical body 221 receives the red light and infrared light emitted by the emitting optical body 211 .

[0057] Furthermore, if Figure 3 The blood oxygen sensor also includes a seal 5 , which wraps the optical device 2 and the electrical connection part of the circuit board 1 .

[0058] Furthermore, the sealing member 5 is epoxy resin 5 .

[0059] Furthermore, if Figure 3The first pin 212 and the second pin 222 are wrapped with epoxy resin 5, and the connection between the connecting terminal 31 and the cable 4 is also wrapped with epoxy resin 5. The epoxy resin 5 seals the first pin 212 and the second pin 222 on the circuit board 1 to play a waterproof role. Similarly, the epoxy resin 5 wraps the connection between the connecting terminal 31 and the cable 4 to prevent the invasion of moisture and cause a short circuit. Therefore, the blood oxygen sensor of this embodiment has a waterproof function. The traditional waterproof structure is to wrap the optical element with a waterproof tape, which has a poor waterproof effect and is difficult to automatically produce. The wiring part of this embodiment is sealed with epoxy resin 5, and the epoxy resin 5 adopts an automated dispensing process to cover the corresponding connection, which reduces the complexity of the processing process, and can be automatically produced with low labor costs. In the subsequent process, since there is no need to wrap with waterproof tape, it is only necessary to fit the component layers together, which is conducive to realizing automated production and has a better waterproof effect.

[0060] Furthermore, the sealing member 5 wraps the connecting terminal 31 and the electrical connection portion of the circuit board 1 .

[0061] Further, please refer again to Figure 2 The circuit board 1 further includes a protection plate 13 disposed above the emitting optical element 21 and the connector 3. The protection plate 13 is used to enhance the stability and firmness of the emitting optical element 21 and the connector 3, and to prevent the emitting optical element 21 from being pressed by the patient when emitting light, thereby preventing the emitting direction from being deviated, causing the receiving optical element 22 to be unable to receive light.

[0062] Furthermore, the blood oxygen sensor also includes a plug 6 connected to the cable 4 and the terminal device. The data measured by the blood oxygen sensor is transmitted to the terminal device through the cable 4 and the plug 6, and the patient or medical staff can obtain the data from the terminal device.

[0063] Furthermore, if Figure 4 A first pearlescent film 71 is provided on the bottom surface of the circuit board 1. The first pearlescent film 71 has two perforations 711 corresponding to the positions of the emitting optical element 21 and the receiving optical element 22 for the emitted light to pass through. The first pearlescent film 71 is waterproof and has a certain mechanical support strength. By providing the first pearlescent film 71, the waterproof function of the blood oxygen sensor is further enhanced.

[0064] Furthermore, an adhesive film 72 is attached to the bottom surface of the first pearlescent film 71 .

[0065] Furthermore, a release film 73 is attached to the bottom surface of the adhesive film 72 .

[0066] Furthermore, two double-sided adhesive films 74 are disposed on the top surface of the circuit board 1 , a second pearl film 75 is disposed between the two double-sided adhesive films 74 , and the double-sided adhesive film 74 is adhered to the first pearl film 75 and the adhesive film 72 to wrap the circuit board.

[0067] Furthermore, an adhesive tape 76 is provided on the top surface of the double-sided adhesive film 74 .

[0068] The first pearlescent film 71, the adhesive film 72, and the release film 73 are stacked in sequence to form structure one, which is tightly attached to the bottom surface of the circuit board 1. The double-sided adhesive film 74, the second pearlescent film 75, the double-sided adhesive film 74, the first pearlescent film 75 and the adhesive film 72 are stacked in sequence to form structure two, which is tightly attached to the top surface of the circuit board 1. The structure one and the structure two are attached to each other and wrap the circuit board 1 therein.

[0069] The blood oxygen sensor of this embodiment is provided with a first pearlescent film 71 and a second pearlescent film 75 on the top and bottom surfaces of the circuit board 1, so that the waterproof function of the blood oxygen sensor is further improved and the strength of the blood oxygen sensor is enhanced, and the materials of the adhesive film 72 and the tape 76 that contact the patient's skin are biocompatible and will not cause allergies to the patient's skin; when using the blood oxygen sensor of this embodiment, first, tear off the release film 73, and fit the adhesive film 72 around the side of the patient's finger so that the transmitting optical element 21 and the receiving optical element 22 are directly opposite.

[0070] In another embodiment, a disposable blood oxygen sensor suitable for automated assembly is provided, comprising a support member and the above-mentioned blood oxygen sensor; the support member is a multi-layer structure; and the blood oxygen sensor is fixedly disposed between the multi-layer structures.

[0071] Furthermore, adjacent layer structures are discontinuous.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A blood oxygen sensor, characterized in that: The invention comprises a circuit board, an optical device electrically connected to the circuit board for detecting the blood oxygen saturation of a patient, a connector electrically connected to the circuit board and a cable connected to the connector, wherein the optical device and the connector respectively comprise an electrical connection part, wherein the electrical connection part is surface mounted and connected to the circuit board, wherein the connector comprises a plurality of connection terminals arranged at intervals and a fixing joint arranged at the top of the connection terminal and used to fix the plurality of connection terminals, wherein the connection terminal comprises a connection body electrically connected to the circuit board and a fixing member arranged on the connection body and used to fix the cable, wherein the cable is connected to the connection terminal when fixed on the connection terminal, wherein the fixing member comprises two fixing claws symmetrically arranged about the axis of the connection body, wherein a space for accommodating the cable is formed between the two fixing claws, and an opening for the cable to enter is formed between the tops of the two fixing claws; wherein the circuit board comprises a circuit board body, a first substrate arranged at one end of the circuit board body and a second substrate arranged at the other end of the circuit board body; wherein the optical device comprises a transmitting optical element arranged on the first substrate and a receiving optical element arranged on the second substrate; The transmitting optical element is configured to transmit an optical signal to the receiving optical element; The blood oxygen sensor also includes a sealant, which covers the electrical connection portion between the optical device and the circuit board. The transmitting optical element includes a transmitting optical body and two first pins electrically connected to the transmitting optical body; the first pins are electrically connected to the circuit board and are wrapped by the sealant. The receiving optical element includes a receiving optical body and two second pins electrically connected to the receiving optical body; the second pins are electrically connected to the circuit board and are wrapped by the sealant. The sealant covers the electrical connection portion between the connecting terminal and the circuit board.

2. The blood oxygen sensor according to claim 1, characterized in that: The connector is a one-piece piece.

3. The blood oxygen sensor according to claim 1, wherein: The circuit board is a flexible circuit board.

4. The blood oxygen sensor according to claim 1, characterized in that: The first substrate comprises a first containing groove for containing the emitting optical element and a light-transmitting film arranged at the bottom of the first containing groove, and the emitting surface of the emitting optical element faces the light-transmitting film.

5. The blood oxygen sensor according to claim 1, characterized in that: The second substrate comprises a second accommodating groove for accommodating the receiving optical element and a light-transmitting hole arranged at the bottom of the second accommodating groove, and the receiving surface of the receiving optical element faces the light-transmitting hole.

6. The blood oxygen sensor according to claim 1, characterized in that: The emission optical element emits red light and infrared light.

7. The blood oxygen sensor according to claim 6, characterized in that: The receiving optical element receives the red light and the infrared light emitted by the emitting optical element.

8. The blood oxygen sensor according to claim 1, characterized in that: The sealing member is also comprised of an epoxy resin member.

9. The blood oxygen sensor according to claim 3, characterized in that: The bottom surface of the flexible circuit board is provided with a first pearlescent film.

10. The blood oxygen sensor according to claim 9, characterized in that: The bottom surface of the first pearlescent film is adhered with an adhesive film.

11. The blood oxygen sensor according to claim 10, characterized in that: A release film is attached to the bottom surface of the adhesive film.

12. The blood oxygen sensor according to claim 11, characterized in that: The top surface of the flexible circuit board is provided with two layers of double-sided adhesive films, a second pearl film is provided between the two layers of double-sided adhesive films, and the double-sided adhesive film is adhered to the first pearl film and the adhesive film to wrap the flexible circuit board.

13. The blood oxygen sensor according to claim 12, characterized in that: The top surface of the double-sided adhesive film is provided with an adhesive tape.

14. A disposable blood oxygen sensor device suitable for automated assembly, characterized in that: It comprises a supporting member and a blood oxygen sensor as described in any one of claims 1 to 13; the supporting member is a multi-layer structure; and the blood oxygen sensor is fixedly arranged between the multiple layer structures.

15. The blood oxygen sensor device according to claim 14, characterized in that: The adjacent layer structures are discontinuous.

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