CN108888275A - A kind of blood oxygen transducer - Google Patents

Abstract

The present invention relates to the field of sensor technology, and provides a blood oxygen sensor, including a circuit board, an optical device electrically connected to the circuit board for detecting blood oxygen saturation of a patient, 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 surface mount connection between the electrical connection part and the flexible circuit board; the blood oxygen sensor provided by the present invention has By setting the connector connected with the optical device, the cable is electrically connected with the optical device through the connector, the reliability of the contact is high and the short circuit is not easy to occur, and the step of welding in the connection process of the cable and the connector is eliminated, further saving process and improve processing efficiency.

Description

A blood oxygen sensor

technical field

The invention belongs to the technical field of sensors, in particular to a blood oxygen sensor.

Background technique

Most of the existing manufacturing processes of disposable blood oxygen sensors use manual welding of optical elements and connecting wires to manually complete the bonding of the upper layer of tape that is in contact with the patient's skin and the inner layer of tape that acts as isolation. The manufacturing process has the following disadvantages: 1 . The structure of the welded assembly is loose and the consistency is poor, which is not conducive to automatic production; 2. Manual assembly is used, the process is complicated and the labor cost is high.

Contents of the invention

The purpose 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.

In order to achieve the above object, 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 blood oxygen saturation of the patient, and an optical device electrically connected to the circuit board A connector 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 connected to the circuit board.

Further, the connector includes a plurality of connecting terminals arranged at intervals and a fixed joint arranged at the top of the connecting terminals and used for fixing the connecting terminals, and the connecting terminals include a connection electrically connected to the circuit board. The main body and the fixing piece arranged on the connecting main body and used for fixing the cable.

Further, the connector is one piece.

Further, the circuit board includes a circuit board body, a first substrate disposed at one end of the circuit board body, and a second substrate disposed at the other end of the circuit board body; the optical device includes a substrate disposed at the first The emitting optical element on the substrate and the receiving optical element arranged on the second substrate; the emitting optical element is configured to emit light signals to the receiving optical element.

Further, the circuit board is a flexible circuit board.

Further, the fixing member includes two fixing claws arranged symmetrically to the axial direction of the connecting body, a space for accommodating the cable is formed between the two fixing claws, and the two fixing claws An opening is formed between the tips for the entry of the cable.

Further, the first substrate includes a first accommodating groove for accommodating the emitting optical element and a light-transmitting film arranged at the bottom of the first accommodating groove, and the emitting surface of the emitting optical element faces The light-transmitting film.

Further, the second substrate includes a second accommodating groove for accommodating the receiving optical element and a light transmission hole provided at the bottom of the second accommodating groove, and the receiving surface of the receiving optical element faces The light-transmitting hole.

Further, the emitting optical element emits red light and infrared light.

Further, the receiving optical element body receives the red light and infrared light emitted by the emitting optical element.

Further, it also includes: a sealing member, the sealing member covers the electrical connection part between the optical device and the circuit board.

Further, it also includes: the sealing member is an epoxy resin member.

Further, 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 sealed by the sealing member pack.

Further, 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 sealed by the sealing member pack.

Further, it further includes: a sealing member, the sealing member covers the electrical connection portion between the connecting terminal and the circuit board.

Further, the sealing member is an epoxy resin member.

Further, the bottom surface of the flexible circuit board is provided with a first pearlescent film.

Further, an adhesive film is pasted on the bottom surface of the first pearlescent film.

Further, a release film is pasted on the bottom surface of the adhesive film.

Further, two layers of double-sided adhesive films are arranged on the top surface of the flexible circuit board, a second pearlescent film is arranged between the two layers of double-sided adhesive films, and the double-sided adhesive film and the first pearlescent film sticking to the adhesive film to wrap the flexible circuit board.

Further, an adhesive tape is provided on the top surface of the double-sided adhesive film.

Another object of the present invention is to provide a disposable blood oxygen sensor suitable for automatic assembly, including a support and the above-mentioned blood oxygen sensor; the support has a multi-layer structure; the blood oxygen sensor is fixed disposed between the plurality of layer structures.

Further, the adjacent layer structures are discontinuous.

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

By setting the circuit board, the blood oxygen sensor can be easily wound on the patient's finger; and the circuit board has high reliability and can be used to set the optical device for detecting the blood oxygen saturation, and the optical device arranged on the circuit board is accurately positioned and easy to process; By setting the connector connected with the optical device, the cable is electrically connected with the optical device through the connector, the reliability of the contact is high and the short circuit is not easy to occur, and the step of welding in the connection process between the cable and the connector is eliminated, saving process and improve processing efficiency.

Description of drawings

Fig. 1 is a three-dimensional structure diagram of a blood oxygen sensor provided by an embodiment of the present invention;

Fig. 2 is an exploded view of the three-dimensional structure of the blood oxygen sensor provided by the embodiment of the present invention;

Fig. 3 is a top view of the blood oxygen sensor provided by the embodiment of the present invention;

Fig. 4 is an exploded view of the three-dimensional structure of the blood oxygen sensor provided by the embodiment of the present invention.

Each reference mark in the figure is:

circuit board 1 Light-transmitting film 112 Connect to the body 311 optical instrument 2 Second storage tank 121 Fastener 312 Connector 3 light hole 122 fixed claw 3121 cable 4 launch optics twenty one The first pearlescent film 71 epoxy resin 5 receiving optics twenty two Adhesive film 72 plug 6 launch optics 211 Release film 73 Circuit board body 10 first pin 212 double sided film 74 first substrate 11 receiving optics 221 Second Pearlescent Film 75 second substrate 12 second pin 222 perforation 711 Protection board 13 connection terminal 31 first storage tank 111 fixed joint 32

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be 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.

It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. The specific implementation of the present invention is described in more detail below in conjunction with specific embodiments:

1 to 3 show a blood oxygen sensor provided by an embodiment of the present invention.

As shown in Fig. 1 and Fig. 2, a blood oxygen sensor provided by the embodiment of the present invention includes a strip-shaped circuit board 1 for wrapping around the patient's finger, arranged at both ends of the circuit board 1 and electrically connected to the circuit board 1 The optical device 2 used to detect the patient's blood oxygen saturation, the connector 3 arranged on the circuit board 1 and connected to the optical device 2, and the cable 4 connected to the connector 3, the optical device 2 and the connector 3 respectively include The electrical connection part, the electrical connection part is soldered to the circuit board 1 by surface mount technology,

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

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

Specifically, the connector 3 includes a plurality of connection terminals 31 arranged parallel to each other at intervals and a fixed joint 32 arranged on the top of the connection terminals 31 and used to fix the plurality of connection terminals 31. The connection terminal 31 includes a connection body connected to the circuit board 1 311 and a fixing piece 312 arranged on the connecting body 311 and used for fixing the cable 4 .

By arranging the connection terminals 31 parallel to each other and at intervals, when the cables 4 are processed onto the connection terminals 31, a plurality of cables 4 can be processed to the corresponding connection terminals 31 at one time by an automated assembly method, which improves the processing efficiency. efficiency; when the cable 4 is fixed on the connection terminal 31, it is connected to the connection terminal 31, and by setting the fixing member 312, it is avoided that the cable 4 and the connection terminal 31 need to be fixedly connected by welding in the process of processing , reducing the welding steps, saving material costs and improving processing efficiency, and the distance between the connecting terminals 31 is very close to each other during the processing, and the welding method is easy to cause a short circuit between the adjacent connecting terminals 31, resulting in the blood oxygen sensor Therefore, the defective rate of the product is reduced by setting the fixing member 312.

Specifically, the circuit board 1 is a flexible circuit board.

Specifically, the connector 3 is in one piece.

Specifically, both the optical device 2 and the connector 3 are soldered to the circuit board 1 in the form of surface mount technology (SMT, Surface Mount Technology), and the cable 4 is connected to the circuit board 1 through the connector 3 in an automatic clamping manner. The components mounted by the SMT process are compact and modular, and their high consistency is conducive to automated production, and the use of automated assembly has simple procedures and low labor costs.

Further, as shown in FIG. 2 , the circuit board 1 includes a circuit board body 10, a first substrate 11 disposed at one end of the circuit board body 10, and a second substrate 12 disposed at the other end of the circuit board body 10; A transmitting optical element 21 on a substrate 11 and a receiving optical element 22 disposed on a second substrate 12 ; the transmitting optical element 21 is configured to transmit an optical 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 facing 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, which mostly adopts a large receiving area, high sensitivity, and dark current. A small, low-noise PIN-type photodiode that converts incoming light signals into electrical signals. When in use, just put the blood oxygen sensor on the fingertip. The emitting optical element 21 and the receiving optical element 22 face up and down with the fingertip between them. Red and infrared light are converted into electrical signals. When the blood oxygen sensor is running, the time-sharing drive circuit makes the two light-emitting diodes emit light at a certain time interval and at a lower duty cycle, according to the luminous intensity and the intensity of the red light and infrared light received by the receiving optical element 22 The ratio can be calculated separately for the whole blood absorption rate, and then combined with the coefficient calibrated in the experiment and substituted into the corresponding formula, the value of blood oxygen saturation can be calculated.

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

Further, the fixing member 312 includes two fixing claws 3121 arranged symmetrically to the axial direction of the connecting body 311, a space for accommodating the cable 4 is formed between the two fixing claws 3121, and a space is formed between the top ends of the two fixing claws 3121. An opening for the cable 4 to enter. During processing, a plurality of cables 4 are clamped between two fixing claws 3121 through the opening, and the fixing claws 3121 fix the cables 4 on the connection body 311 , and the cables 4 and the connection body 311 are connected.

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 retracted toward the central axis of the fixing member 312 by means of automatic clamping, and the cable 4 is firmly secured. Ground is fixed between the fixed claws 3121 to prevent the cable 4 from coming out and cause poor contact.

Further, the emitting optical element 21 includes an emitting optical body 211 and two first pins 212 arranged on the sides of the emitting optical body 211, the first pins 212 are connected to the connecting body 311, and the receiving optical element 22 includes a receiving optical body 221 and The two second pins 222 disposed on the side of the receiving optical body 221 are connected to the connecting body 311 .

Further, the first substrate 11 includes a first accommodating groove 111 for accommodating the emitting optical body 211 and a light-transmitting film 112 arranged at the bottom of the first accommodating groove 111, and the emitting surface of the emitting optical body 211 faces the light-transmitting film112. By providing the first accommodation groove 111, it is convenient for positioning during surface mount processing. The bottom of the first accommodation groove 111 is provided with a light-transmitting film 112, and the light emitted by the emitting optical body 211 is emitted from the emitting surface and transmitted through the transparent The light film 112 is emitted to the receiving optical element 22 , and by setting the light-transmitting film 112 , the excessive loss of the light emitted by the emitting optical body 211 during the transmission process is prevented from affecting the test results.

Further, the second substrate 12 includes a second accommodating groove 121 for accommodating the receiving optical body 221 and a light-transmitting hole 122 provided 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 setting the second accommodating groove 121, the positioning during surface mount processing is facilitated, and the bottom of the second accommodating groove 121 is provided with a light-transmitting hole 122 to prevent the light emitted by the emitting optical body 211 from being blocked during transmission. , to avoid excessive loss, affect the reception effect, and cause inaccurate test results.

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

Further, the receiving optical body 221 receives the red light and the infrared light emitted by the emitting optical body 211 .

Further, as shown in FIG. 3 , the blood oxygen sensor further includes a seal 5 , and the seal 5 wraps the electrical connection part of the optical device 2 and the circuit board 1 .

Further, the sealing member 5 is epoxy resin 5 .

Further, as shown in FIG. 3 , the first pin 212 and the second pin 222 are wrapped with epoxy resin 5, and the connection between the connection terminal 31 and the cable 4 is also wrapped with epoxy resin 5, and the epoxy resin 5 connects the first The pin 212 and the second pin 222 are solidly sealed 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 intrusion of moisture and cause short circuit, therefore, the blood oxygen sensor in this embodiment already has waterproof function. The traditional waterproof structure is to wrap the optical components with waterproof tape, which has poor waterproof effect and is difficult to be automatically produced. The epoxy resin used in this embodiment 5 solid-sealed wiring, and epoxy resin 5 adopts automatic dispensing process to cover the corresponding connection, which reduces the complexity of the processing process, and can be automated production, low labor cost, and in the subsequent process, Since there is no need to wrap the waterproof tape, only the component layers need to be bonded between the layers, which is conducive to the realization of automatic production, and its waterproof effect is also better.

Further, the sealing member 5 wraps the connection terminal 31 and the electrical connection portion of the circuit board 1 .

Further, referring to FIG. 2 again, the circuit board 1 further includes a protective plate 13 disposed above the emitting optical element 21 and the connector 3 . The protective plate 13 is used to enhance the stability and firmness of the emitting optical element 21 and the connector 3, avoiding the deviation of the emitting direction caused by the pressing of the patient when the emitting optical element 21 emits light, causing the receiving optical element 22 to fail to receive light. light.

Further, the blood oxygen sensor also includes a plug 6 connected to the cable 4 and connected to 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 patients or medical staff can obtain the data from the terminal device.

Further, as shown in FIG. 4 , the bottom surface of the circuit board 1 is provided with a first pearlescent film 71, and the first pearlescent film 71 is provided with 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 setting the first pearlescent film 71, the waterproof function of the blood oxygen sensor is further enhanced.

Further, an adhesive film 72 is attached to the bottom surface of the first pearlescent film 71 .

Further, a release film 73 is bonded to the bottom surface of the adhesive film 72 .

Further, the top surface of the circuit board 1 is provided with two double-sided adhesive films 74, the second pearlescent film 75 is arranged between the two double-sided adhesive films 74, the double-sided adhesive film 74 is connected with the first pearlescent film 75 and the adhesive glue The film 72 is applied to wrap the circuit board.

Further, an adhesive tape 76 is provided on the top surface of the double-sided adhesive film 74 .

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

The blood oxygen sensor of this embodiment is provided with a first pearlescent film 71 and a second pearlescent film 75 on the top surface and the bottom surface 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 strengthened, and The adhesive film 72 and adhesive tape 76 are biocompatible with the materials that are in contact with the patient's skin, and the use will not cause skin allergies of the patient; The adhesive film 72 is pasted around the side of the patient's finger so that the emitting optical element 21 and the receiving optical element 22 are facing each other.

In another embodiment, a disposable blood oxygen sensor suitable for automatic assembly is provided, including a support and the above-mentioned blood oxygen sensor; the support is a multi-layer structure; the blood oxygen sensor is fixedly arranged between the multi-layer structures between.

Further, adjacent layer structures are discontinuous.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (23)

1. a kind of blood oxygen transducer, it is characterised in that：Including circuit board, with the circuit board electrical connection for detecting patient's blood The optical device of oxygen saturation, with the connector of the circuit board electrical connection and the cable being connect with the connector, the light It learns device and the connector respectively includes electrical connections, surface mount connects between the electrical connections and the circuit board It connects.

2. blood oxygen transducer as described in claim 1, it is characterised in that：The connector includes multiple spaced connections Anchor tip of the terminal with the connection terminal top is set to and for fixing the multiple connection terminal, the connection terminal Including the connection ontology with the circuit board electrical connection and it is set on the connection ontology and is used to fix consolidating for the cable Determine part.

3. blood oxygen transducer as described in claim 1, it is characterised in that：The connector is integrated.

4. blood oxygen transducer as described in claim 1, it is characterised in that：The circuit board include circuit board body, setting exist The first substrate of described circuit board body one end and the second substrate that the circuit board body other end is set；The optics device Part includes the transmitting optical element being set on the first substrate and the reception optical element being set in the second substrate； The transmitting optical element is arranged to that optical signal can be emitted to the reception optical element.

5. blood oxygen transducer as described in claim 1, it is characterised in that：The circuit board is flexible circuit board.

6. blood oxygen transducer as claimed in claim 2, it is characterised in that：The fixing piece includes with the axis of the connection ontology Form the space that can accommodate the cable to symmetrically arranged two fixed jaws, between described two fixed jaws, described two The opening entered for the cable is formed between the top of a fixed jaw.

7. blood oxygen transducer as claimed in claim 4, it is characterised in that：The first substrate includes for accommodating the transmitting The light transmission film of first accommodation groove of optical element and the bottom for being set to first accommodation groove, the transmitting optical element The surface of emission is towards the light transmission film.

8. blood oxygen transducer as claimed in claim 4, it is characterised in that：The second substrate includes for accommodating the reception The loophole of second accommodation groove of optical element and the bottom for being set to second accommodation groove, it is described to receive connecing for optical element It receives facing towards the loophole.

9. blood oxygen transducer as claimed in claim 4, it is characterised in that：Transmitting optical element transmitting feux rouges and infrared Light.

10. blood oxygen transducer as claimed in claim 9, it is characterised in that：The reception optical component body receives the transmitting The feux rouges and infrared light of optical element transmitting.

11. blood oxygen transducer as claimed in claim 4, it is characterised in that：It further include sealing element, described in the sealing element cladding The electrical connections of optical device and the circuit board.

12. blood oxygen transducer as claimed in claim 11, it is characterised in that：Further include the sealing element be epoxy resin part.

13. blood oxygen transducer as claimed in claim 11, it is characterised in that：The transmitting optical element includes transmitting optics sheet Body and two the first pins being electrically connected in the transmitting optical bodies；First pin and the circuit board electrical connection, And it is wrapped up by the sealing element.

14. blood oxygen transducer as claimed in claim 11, it is characterised in that：The reception optical element includes receiving optics sheet Body and two second pins being electrically connected in the reception optical bodies；The second pin and the circuit board electrical connection, And it is wrapped up by the sealing element.

15. blood oxygen transducer as claimed in claim 2, it is characterised in that：It further include sealing element, described in the sealing element cladding The electrical connections of connection terminal and the circuit board.

16. blood oxygen transducer as claimed in claim 15, it is characterised in that：The sealing element is epoxy resin part.

17. such as the described in any item blood oxygen transducers of claim 1-16, it is characterised in that：The bottom surface of the flexible circuit board is set It is equipped with the first pearl film.

18. blood oxygen transducer as claimed in claim 17, it is characterised in that：The bottom surface of first pearl film is bonded toughness Glue film.

19. blood oxygen transducer as claimed in claim 18, it is characterised in that：The bottom surface of the viscosity glue film is fitted with release Film.

20. blood oxygen transducer as claimed in claim 19, it is characterised in that：The top surface of the flexible circuit board is provided with two layers Two-sided glue film, be provided between two layers of two-sided glue film the second pearl film, the two-sided glue film and first pearl film and The viscosity glue film fitting is to wrap up the flexible circuit board.

21. blood oxygen transducer as claimed in claim 20, it is characterised in that：The top surface of the two-sided glue film is provided with adhesive tape.

22. a kind of disposable blood oxygen transducer suitable for automatic assembling, it is characterised in that：Including supporting element and as weighed Benefit requires the described in any item blood oxygen transducers of 1-21；The supporting element is multiple layers of structure；The blood oxygen transducer is fixed It is arranged between the multiple layer structure.

23. blood oxygen transducer as claimed in claim 22, it is characterised in that：The adjacent layer structure is in discontinuous shape.