Flexible circuit board for high performance transducers

Abstract

The utility model discloses a kind of flexible circuit board for high-performance transducer, belong to medical ultrasonic equipment technical field, including circuit area, superimposed area, auxiliary folding FPC, positioning FPC, connector and pad;Circuit area is equipped with FPC circuit, one side of circuit area is integrally connected with auxiliary folding FPC, FPC is equipped with FPC on slot on auxiliary folding FPC, the position of FPC on slot of circuit area is equipped with FPC lower slot, superimposed area is integrally connected with the bottom end of circuit area, superimposed area both ends are equipped with positioning FPC, and positioning FPC is equipped with positioning hole;Multiple foldable units are fixed to the back of superimposed area after folding along FPC on slot and FPC lower slot;The utility model uses the above structure's a kind of flexible circuit board for high-performance transducer, improves efficiency and the reliability of transducer by unique structure improvement and process optimization.

Description

Technical Field

[0001] This utility model relates to the field of medical ultrasound equipment technology, and in particular to a flexible circuit board for a high-performance transducer. Background Technology

[0002] In the actual operation of transducers, flexible printed circuit boards (FPCs) play a crucial role in signal transmission and energy conversion. However, traditional transducer FPCs have many drawbacks. When faced with frequent bending or complex stress environments, their internal circuitry is prone to damage due to stress concentration, leading to abnormal signal transmission and severely affecting transducer performance. Furthermore, the dimensional consistency of traditional transducer FPCs is difficult to guarantee after processes such as lamination and folding, especially for smaller interstitial transducers, which negatively impacts transducer stability and energy conversion efficiency. In addition, traditional FPC manufacturing processes struggle to meet the growing demand for miniaturized and high-performance transducers. Utility Model Content

[0003] The purpose of this invention is to provide a flexible circuit board for high-performance transducers to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides a flexible circuit board for a high-performance transducer, including a circuit area, a stacking area, an auxiliary folding FPC, a positioning FPC, a connector, and pads.

[0005] The circuit area is provided with FPC circuits. One side of the circuit area is integrally connected with the auxiliary folding FPC. The auxiliary folding FPC is provided with an upper FPC slot. The circuit area is provided with an lower FPC slot corresponding to the position of the upper FPC slot. The upper FPC slot and the lower FPC slot are one-to-one and their center lines in the extension direction are collinear. The upper FPC slot and the lower FPC slot together divide the flexible circuit board into multiple foldable units.

[0006] The overlapping area is integrally connected to the bottom end of the line area, and positioning FPCs are respectively provided at both ends of the overlapping area, and positioning holes are provided on the positioning FPCs;

[0007] The pad is located at one end of the circuit area near the overlapping area and is electrically connected to the FPC circuit. The connector is located at one end of the circuit area away from the overlapping area and is electrically connected to the FPC circuit.

[0008] After the plurality of foldable units are folded along the upper slot and the lower slot of the FPC, they are fitted and fixed to the back of the overlapping area.

[0009] The auxiliary folding FPC and the positioning FPC are detachable auxiliary structures that are cut off after the transducer test is completed.

[0010] Preferably, the slots on the upper and lower parts of the FPC are evenly distributed along the length of the flexible circuit board.

[0011] Preferably, the number of positioning holes is at least two, and the axis of the positioning holes is located on the center line of the overlapping area.

[0012] Preferably, the plurality of foldable units are fixed to the back side of the overlapping area by adhesive bonding.

[0013] Preferably, the pads are provided in multiple locations and are distributed at intervals along the edge of the circuit area near the overlap area.

[0014] Therefore, the flexible circuit board for a high-performance transducer using the above-described structure of this utility model has the following beneficial effects:

[0015] (1) The added auxiliary folding FPC punching and slotting design makes the FPC folding smoother. The upper and lower slot centers are on a straight line, which can improve the folding accuracy and ensure that adjacent holes cooperate with each other during the FPC folding process, guide the folding path, and reduce local stress concentration. At the same time, it reduces the number of folding operations and avoids damage caused by frequent bending and stress on the FPC. With the positioning FPC and folding tooling, the size after folding can be better controlled within the required range.

[0016] (2) Due to the small size of the intervening transducer and the difficulty of operation, the positioning FPC with positioning holes can reduce the difficulty of stacking and folding operations, improve efficiency, and improve the size consistency of the transducer after folding, thus improving product quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a flexible circuit board for a high-performance transducer according to the present invention.

[0018] Figure 2 This is an enlarged schematic diagram of the detachable portion of a flexible circuit board for a high-performance transducer according to this utility model.

[0019] Figure 3 This is a schematic diagram of a folded flexible circuit board for a high-performance transducer according to the present invention.

[0020] Reference numerals: 1. FPC circuit; 2. Upper slot of FPC; 3. Lower slot of FPC; 4. Auxiliary folding FPC; 5. Overlapping area; 6. Positioning FPC; 7. Positioning hole; 8. Solder pad; 9. Connector; 10. Folded transducer. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] Example

[0024] like Figures 1-3 As shown, a flexible circuit board for a high-performance transducer includes a circuit area, a stacking area 5, an auxiliary folding FPC 4, a positioning FPC 6, a connector 9, and a pad 8.

[0025] The circuit area is equipped with an FPC line 1 for transmitting electrical signals. One side of the circuit area is integrally connected with an auxiliary folding FPC 4. The auxiliary folding FPC 4 is provided with an upper FPC slot 2. The circuit area is provided with an lower FPC slot 3 at the position corresponding to the upper FPC slot 2. The upper FPC slot 2 and the lower FPC slot 3 correspond one-to-one and their center lines in the extension direction are collinear. The upper FPC slot 2 and the lower FPC slot 3 are evenly distributed along the length direction of the flexible circuit board. The upper FPC slot 2 and the lower FPC slot 3 together divide the flexible circuit board into multiple foldable units. After the multiple foldable units are folded along the upper FPC slot 2 and the lower FPC slot 3, they are attached and fixed to the back of the stacking area 5. The multiple foldable units are fixed to the back of the stacking area 5 by adhesive bonding to form a multi-layer stacked structure to shorten the signal transmission distance and improve space utilization. The folded transducer 10 is shown in the figure.

[0026] The overlapping area 5 is integrally connected to the bottom of the line area. The overlapping area 5 is provided with positioning FPC6 at both ends. The positioning FPC6 is provided with positioning holes 7. There are at least two positioning holes 7, and the axis of the positioning holes 7 is located on the center line of the overlapping area 5.

[0027] The pad 8 is located at one end of the circuit area near the overlapping area 5 and is electrically connected to the FPC line 1. Multiple pads 8 are provided and are distributed at intervals along the edge of the circuit area near the overlapping area 5. The connector 9 is located at one end of the circuit area away from the overlapping area 5 and is electrically connected to the FPC line 1.

[0028] The auxiliary folding FPC4 and positioning FPC6 are detachable auxiliary structures that are cut off after the transducer testing is completed to reduce redundant structures, reduce interference, and reduce weight.

[0029] Working principle: External electrical signals enter FPC line 1 through connector 9, are transmitted to pad 8, and then connected to the piezoelectric element or other functional components of the transducer. After signal processing, the signals are transmitted back to connector 9 along the reverse path and output to external devices. The folded structure reduces signal attenuation and interference by shortening the signal transmission path. The symmetrical design of the upper slot 2 and lower slot 3 of the FPC ensures uniform stress distribution during folding to avoid line breakage. The multi-layer folded structure enhances the rigidity of the circuit board to reduce the impact of vibration on signal transmission. The positioning hole 7 of positioning FPC 6 cooperates with the folding pressure holding fixture to ensure folding accuracy. After testing, the auxiliary structure is removed to avoid interference with the actual working environment of the transducer. The multi-layer structure after folding reduces the size of the circuit board to meet the miniaturization requirements of the transducer. At the same time, the compact circuit layout reduces parasitic effects to improve high-frequency signal transmission performance. Thus, while ensuring the reliability of signal transmission, miniaturization, lightweighting, and high integration are achieved, meeting the stringent requirements of high-performance transducers.

[0030] Therefore, this utility model presents a high-performance flexible circuit board for a transducer with the above-mentioned structure, which represents a breakthrough innovative design. Through unique structural improvements and process optimization, it enhances efficiency and transducer reliability.

[0031] Finally, it should be noted that the above embodiments are only preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be covered within the protection scope of the present utility model.

Claims

1. A flexible circuit board for high performance transducers, characterized by: This includes the circuit area, the overlapping area, the auxiliary folding FPC, the positioning FPC, the connector, and the pads; The circuit area is provided with FPC circuits. One side of the circuit area is integrally connected with the auxiliary folding FPC. The auxiliary folding FPC is provided with an upper FPC slot. The circuit area is provided with an lower FPC slot corresponding to the position of the upper FPC slot. The upper FPC slot and the lower FPC slot are one-to-one and their center lines in the extension direction are collinear. The upper FPC slot and the lower FPC slot together divide the flexible circuit board into multiple foldable units. The overlapping area is integrally connected to the bottom end of the line area, and positioning FPCs are respectively provided at both ends of the overlapping area, and positioning holes are provided on the positioning FPCs; The pad is located at one end of the circuit area near the overlapping area and is electrically connected to the FPC circuit. The connector is located at one end of the circuit area away from the overlapping area and is electrically connected to the FPC circuit. After the plurality of foldable units are folded along the upper slot and the lower slot of the FPC, they are fitted and fixed to the back of the overlapping area. The auxiliary folding FPC and the positioning FPC are detachable auxiliary structures that are cut off after the transducer test is completed.

2. A flexible circuit board for a high performance transducer according to claim 1, characterized in that: The slots on the upper and lower parts of the FPC are evenly distributed along the length of the flexible circuit board.

3. The flexible circuit board for a high-performance transducer according to claim 1, characterized in that: The number of positioning holes is at least two, and the axis of the positioning holes is located on the center line of the overlapping area.

4. The flexible circuit board for a high-performance transducer according to claim 1, characterized in that: The plurality of foldable units are fixed to the back of the overlapping area by adhesive bonding.

5. The flexible circuit board for a high-performance transducer according to claim 1, characterized in that: The pads are configured as a plurality and are distributed at intervals along the edge of the circuit area near the overlapping area.

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