An anti-interference flexible printed circuit board suitable for a blood oxygen probe

Abstract

The application discloses an anti-interference flexible printed circuit board suitable for a blood oxygen probe and relates to the technical field of medical devices.The structure comprises a first shielding layer, a PI substrate layer and a second shielding layer arranged in sequence from top to bottom; a plurality of shielding vias in a cylindrical structure, one end of the shielding via being arranged on the first shielding layer, the other end of the shielding via being arranged on the second shielding layer, and the shielding via penetrating through the PI substrate layer; a plurality of electronic components arranged on the PI substrate layer, each electronic component being connected through different signal lines laid on the PI substrate layer based on a preset circuit diagram; a corresponding component opening is arranged in a region above the electronic components of the first shielding layer, and the size of the component opening is matched with the size of the corresponding electronic component. Through the specific circuit board structure, the anti-static and anti-interference capabilities of the circuit board are improved under the premise of ensuring the strength of the circuit board, the user experience is improved, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to an anti-interference flexible printed circuit board suitable for blood oxygen probes. Background Technology

[0002] Existing pulse oximeter probes for patients mostly use manual soldering of LEDs and PDs, which easily leads to poor soldering, component damage, and affects production efficiency and cost. Another approach uses simplified flexible printed circuit boards (FPCs), employing automated surface mount equipment to solder LEDs and PDs, thus resolving issues such as cold solder joints and short circuits. While FPCs have a simple design and relatively low cost, their lack of electromagnetic shielding reduces production costs. However, they are susceptible to interference from external electromagnetic fields, leading to signal transmission distortion, affecting product performance, and causing crosstalk between internal signals, thus degrading signal quality.

[0003] Therefore, to meet practical needs, an anti-interference flexible printed circuit board suitable for blood oxygen probes is provided. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide an anti-interference flexible printed circuit board suitable for pulse oximeter probes. Through a specific circuit board structure, while ensuring the strength of the circuit board itself, it prevents the LEDs and PDs in the probe from shifting when the user uses the probe, thereby increasing the reliability of the probe. Automated soldering of LEDs and PDs improves production efficiency and reduces production costs. After adding EMC measures, the anti-interference capability is enhanced, effectively improving the user experience and extending the service life.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] This application provides an anti-interference flexible printed circuit board suitable for pulse oximeter probes, the anti-interference flexible printed circuit board comprising:

[0007] The first shielding layer, the PI substrate layer, and the second shielding layer are arranged sequentially from top to bottom;

[0008] Multiple cylindrical shielding vias are provided, with one end of the shielding via opening on the first shielding layer and the other end of the shielding via opening on the second shielding layer, and the shielding vias passing through the PI substrate layer;

[0009] Multiple electronic components are disposed on the PI substrate layer, and each electronic component is connected by different signal lines laid on the PI substrate layer based on a preset circuit diagram.

[0010] The first shielding layer has a corresponding component opening in the area directly above the electronic component, and the size of the component opening matches the size of the corresponding electronic component; wherein...

[0011] The electronic components include LEDs, PDs, cable solder joints, and bare copper points.

[0012] Based on the above technical solution, the anti-interference flexible printed circuit board further includes:

[0013] The pulse oximeter terminal has a pulse oximeter cable that is connected to the corresponding signal line laid on the PI substrate layer based on a preset circuit diagram.

[0014] The outer shielding wire of the blood oxygen terminal is connected to the second shielding layer.

[0015] Based on the above technical solution, the first shielding layer includes a first electrostatic layer, a first electromagnetic film, and a first copper cladding layer arranged sequentially from top to bottom.

[0016] Based on the above technical solution, the second shielding layer includes a second copper cladding layer, a second electromagnetic film, and a second electrostatic layer arranged sequentially from top to bottom.

[0017] Based on the above technical solution, a plurality of back reinforcement plates are provided on the outer side of the second shielding layer;

[0018] One of the aforementioned back reinforcement plates corresponds to one of the aforementioned electronic components;

[0019] The back reinforcement plate and the corresponding electronic components are located on the bottom and top surfaces of the second shielding layer at the same position, respectively.

[0020] The size of the central through hole of the back reinforcement plate matches the size of the corresponding outer edge contour of the back reinforcement plate.

[0021] Based on the above technical solution, the anti-interference flexible printed circuit board also includes a back-side tear-resistant copper structure;

[0022] The back tear-resistant copper structure is located at the edge of the bottom surface of the second shielding layer and flips over from top to bottom to wrap around the corresponding sides of the first shielding layer and the PI substrate layer.

[0023] Based on the above technical solution, the anti-interference flexible printed circuit board also includes a protective cover;

[0024] The protective cover is used to detachably wrap the cable solder joints.

[0025] Compared with the prior art, the advantages of this application are:

[0026] This application utilizes a specific circuit board structure to improve the circuit board's anti-static and anti-interference capabilities while ensuring its own strength, thereby effectively enhancing user experience and extending its service life. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the anti-interference flexible printed circuit board for a pulse oximeter according to an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the layered structure of the first shielding layer, the PI substrate layer, and the second shielding layer in the anti-interference flexible printed circuit board for pulse oximeter probes according to an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the internal structure of an anti-interference flexible printed circuit board suitable for a pulse oximeter probe according to an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the top surface structure of an anti-interference flexible printed circuit board suitable for a pulse oximeter probe according to an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the bottom structure of an anti-interference flexible printed circuit board suitable for a pulse oximeter probe according to an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the layout of the back-side tear-resistant copper structure in the anti-interference flexible printed circuit board for pulse oximeters according to an embodiment of this application.

[0034] Figure 7 This is a schematic diagram of the assembly of the protective cover in the anti-interference flexible printed circuit board for a pulse oximeter probe according to an embodiment of this application;

[0035] In the picture:

[0036] 1. First shielding layer; 10. Component opening; 11. First electrostatic layer; 12. First electromagnetic film; 13. First copper cladding layer; 2. PI substrate layer; 3. Second shielding layer; 30. Second copper cladding layer; 31. Second electromagnetic film; 32. Second electrostatic layer; 4. Shielding via; 5. Signal line; 6. Blood oxygen terminal; 60. Blood oxygen cable; 61. Outer shielding wire; 7. Back reinforcement plate; 8. Back tear-resistant copper structure; 9. Protective cover; A. Electronic components. Detailed Implementation

[0037] Terminology Explanation:

[0038] PI: Polyimide;

[0039] LED: Light-Emitting Diode;

[0040] PD: Photodiode;

[0041] FPC: Flexible Printed Circuit.

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0044] This application provides an anti-interference flexible printed circuit board suitable for pulse oximeter probes. Through a specific circuit board structure, the anti-static and anti-interference capabilities of the circuit board are improved while ensuring its own strength, effectively enhancing user experience and extending service life.

[0045] To achieve the aforementioned technical effects, the overall concept of this application is as follows:

[0046] An anti-interference flexible printed circuit board for use with a pulse oximeter probe, the anti-interference flexible printed circuit board comprising:

[0047] The first shielding layer 1, the PI substrate layer 2, and the second shielding layer 3 are arranged sequentially from top to bottom;

[0048] Multiple cylindrical shielding vias 4 are provided, with one end of the shielding via 4 opening onto the first shielding layer 1 and the other end of the shielding via 4 opening onto the second shielding layer 3. The shielding via 4 passes through the PI substrate layer 2.

[0049] Multiple electronic components A are disposed on the PI substrate layer 2, and each electronic component A is connected by different signal lines 5 laid on the PI substrate layer 2 based on a preset circuit diagram.

[0050] The first shielding layer 1 has a corresponding component opening 10 located directly above the electronic component A, and the size of the component opening 10 matches the size of the corresponding electronic component A; wherein...

[0051] The electronic component A includes LEDs, PDs, cable solder joints, and bare copper points.

[0052] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0053] See Figures 1-7 As shown in the figure, this application provides an anti-interference flexible printed circuit board suitable for pulse oximeter probes, the anti-interference flexible printed circuit board comprising:

[0054] The first shielding layer 1, the PI substrate layer 2, and the second shielding layer 3 are arranged sequentially from top to bottom;

[0055] Multiple cylindrical shielding vias 4 are provided, with one end of the shielding via 4 opening onto the first shielding layer 1 and the other end of the shielding via 4 opening onto the second shielding layer 3. The shielding via 4 passes through the PI substrate layer 2.

[0056] Multiple electronic components A are disposed on the PI substrate layer 2, and each electronic component A is connected by different signal lines 5 laid on the PI substrate layer 2 based on a preset circuit diagram.

[0057] The first shielding layer 1 has a corresponding component opening 10 located directly above the electronic component A, and the size of the component opening 10 matches the size of the corresponding electronic component A; wherein...

[0058] The electronic component A includes LEDs, PDs, cable solder joints, and bare copper points.

[0059] It should be noted that the following technical solutions are commonly used in existing technologies:

[0060] Similar solution 1: The FPC body is provided with a first copper layer, a PI substrate and a second copper layer. The first and second copper layers are provided with vias, and shielding pads are connected through the vias. The shielding wires are connected to improve the electromagnetic interference performance.

[0061] Similar solution 2: The FPC body is provided with a first electrostatic layer, a first copper layer, a PI substrate, a second copper layer, and a second electrostatic layer. Via connection shielding pads are provided in both the first and second copper layers, and they are connected by a shielding wire to improve electromagnetic interference resistance.

[0062] Solution 3: The FPC body is provided with a first reinforcing area, a first electrostatic layer, a first copper layer, a PI substrate, a second copper layer, a second electrostatic layer, and a second reinforcing area. Via connection shielding pads are provided in both the first and second copper layers, and they are connected by a shielding wire to improve electromagnetic interference resistance.

[0063] In this embodiment, a specific circuit board structure is used to improve the circuit board's anti-static and anti-interference capabilities while ensuring its own strength, thereby effectively enhancing the user experience and extending its service life.

[0064] Furthermore, the anti-interference flexible printed circuit board also includes:

[0065] The blood oxygen terminal 6, and the blood oxygen cable 60 of the blood oxygen terminal 6 are connected to the corresponding signal line 5 laid on the PI substrate layer 2 based on a preset circuit diagram.

[0066] The outer shielding wire 61 of the blood oxygen terminal 6 is connected to the second shielding layer 3.

[0067] Furthermore, the first shielding layer 1 includes a first electrostatic layer 11, a first electromagnetic film 12, and a first copper cladding layer 13 arranged sequentially from top to bottom.

[0068] Furthermore, the second shielding layer 3 includes a second copper cladding layer 30, a second electromagnetic film 31, and a second electrostatic layer 32 arranged sequentially from top to bottom.

[0069] Furthermore, a plurality of back reinforcement plates 7 are provided on the outer side of the second shielding layer 3;

[0070] One of the back reinforcement plates 7 corresponds to one of the electronic components A;

[0071] The back reinforcement plate 7 and the corresponding electronic component A are located on the bottom and top surfaces of the second shielding layer 3 at the same position, respectively.

[0072] The size of the central through hole of the back reinforcement plate 7 matches the size of the corresponding outer edge contour of the back reinforcement plate 7.

[0073] Furthermore, the anti-interference flexible printed circuit board also includes a back-side tear-resistant copper structure 8;

[0074] The back tear-resistant copper structure 8 is disposed on the edge of the bottom surface of the second shielding layer 3, and flips over from top to bottom to wrap around the corresponding sides of the first shielding layer 1 and the PI substrate layer 2.

[0075] Furthermore, the anti-interference flexible printed circuit board also includes a protective cover 9;

[0076] The protective cover 9 is used to detachably wrap the cable welding points.

[0077] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0078] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0079] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An anti-interference flexible printed circuit board suitable for pulse oximeter probes, characterized in that, The anti-interference flexible printed circuit board includes: The first shielding layer (1), the PI substrate layer (2), and the second shielding layer (3) are arranged sequentially from top to bottom; Multiple cylindrical shielding vias (4) are provided, with one end of the shielding via (4) open on the first shielding layer (1) and the other end of the shielding via (4) open on the second shielding layer (3). The shielding via (4) passes through the PI substrate layer (2). Multiple electronic components (A) are disposed on the PI substrate layer (2), and each electronic component (A) is connected by different signal lines (5) laid on the PI substrate layer (2) based on a preset circuit diagram. The first shielding layer (1) has a corresponding component opening (10) located directly above the electronic component (A), and the size of the component opening (10) matches the size of the corresponding electronic component (A); wherein, The electronic components (A) include LEDs, PDs, cable solder joints, and bare copper points.

2. The anti-interference flexible printed circuit board suitable for pulse oximeter probes as described in claim 1, characterized in that, The anti-interference flexible printed circuit board also includes: The blood oxygen terminal (6) and the blood oxygen cable (60) of the blood oxygen terminal (6) are connected to the corresponding signal line (5) laid on the PI substrate layer (2) based on a preset circuit diagram. The outer shielding wire (61) of the blood oxygen terminal (6) is connected to the second shielding layer (3).

3. The anti-interference flexible printed circuit board for pulse oximeters as described in claim 1, characterized in that: The first shielding layer (1) includes a first electrostatic layer (11), a first electromagnetic film (12), and a first copper cladding layer (13) arranged sequentially from top to bottom.

4. The anti-interference flexible printed circuit board for pulse oximeters as described in claim 1, characterized in that: The second shielding layer (3) includes a second copper cladding layer (30), a second electromagnetic film (31), and a second electrostatic layer (32) arranged sequentially from top to bottom.

5. The anti-interference flexible printed circuit board for pulse oximeters as described in claim 1, characterized in that: Multiple back reinforcement plates (7) are provided on the outer side of the second shielding layer (3); One of the back reinforcement plates (7) corresponds to one of the electronic components (A); The back reinforcement plate (7) and the corresponding electronic component (A) are located on the bottom and top surfaces of the second shielding layer (3) at the same position, respectively. The size of the central through hole of the back reinforcement plate (7) matches the size of the outer edge contour of the corresponding back reinforcement plate (7).

6. The anti-interference flexible printed circuit board for a pulse oximeter as described in claim 1, characterized in that, The anti-interference flexible printed circuit board also includes a back-side tear-resistant copper structure (8); The back tear-resistant copper structure (8) is set at the edge of the bottom surface of the second shielding layer (3) and flips over from top to bottom to wrap around the corresponding sides of the first shielding layer (1) and the PI substrate layer (2).

7. The anti-interference flexible printed circuit board for a pulse oximeter probe as described in claim 1, characterized in that, The anti-interference flexible printed circuit board also includes a protective cover (9); The protective cover (9) is used to detachably wrap the cable welding points.

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