Sensor, automobile seat and automobile

Abstract

The utility model discloses a sensor, an automobile seat and an automobile, and belongs to the technical field of sensors. The sensor is used for pressure detection and comprises a detection sheet production unit and an electric connection unit which are electrically connected with each other, the detection sheet-making unit comprises a spacing layer, a thin film layer and a conductive material layer, and the spacing layer is provided with a hollow hole; the film layers are arranged on two sides of the spacing layer; the two conductive material layers are located on the two opposite sides of the spacing layer and arranged between the spacing layer and the thin film layer on the corresponding side respectively, each conductive material layer comprises a conductive contact part arranged corresponding to the same hollow hole to form a pressure switch, and connecting leads are arranged on the conductive material layers and used for being electrically connected with the electric connection unit. Further forming a detection circuit comprising a pressure switch; and the vertical projection area of the conductive contact part on the spacing layer is smaller than the area of the hollow hole. The sensor can save conductive materials and reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a sensor and an automobile seat and vehicle. Background Technology

[0002] Currently, many modes of transportation (especially automobiles) are generally equipped with occupancy sensors to automatically detect whether there is a driver or passenger in the seat, which can be used in various in-vehicle functions such as seat belt reminder systems, airbag suppression control, seat adjustment and smart cockpit interaction.

[0003] However, as users' demands for seat comfort continue to increase, the number of sensors that need to be installed on the seats increases, and the cost also increases accordingly.

[0004] Therefore, how to reduce the cost of the sensor without affecting its functionality is one of the problems studied in this application. Utility Model Content

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first aspect of the present invention aims to provide a sensor that reduces sensor cost by reasonably reducing the amount of conductive material used.

[0006] The second aspect of this invention aims to provide a car seat with the aforementioned sensors.

[0007] The objective of the third aspect of this utility model is to provide a vehicle having the aforementioned sensor or the aforementioned car seat.

[0008] According to a first aspect of the present invention, a sensor for pressure detection includes: a detection sheet preparation unit and an electrical connection unit, the electrical connection unit being connected to the detection sheet preparation unit; the detection sheet preparation unit includes: a spacer layer, two thin film layers, and two conductive material layers; the spacer layer has at least one perforation; the two thin film layers are disposed on opposite sides of the spacer layer; the two conductive material layers are located on opposite sides of the spacer layer, and each is disposed between the spacer layer and the corresponding side of the thin film layer; each of the two conductive material layers includes a conductive contact portion corresponding to the same perforation to form a pressure switch; each conductive material layer also includes a connecting lead connecting the conductive contact portion; the two conductive material layers have at least two connecting leads connected to the electrical connection unit to form a circuit with the pressure switch; wherein, the vertical projection area of ​​at least one conductive contact portion on the spacer layer is smaller than the area of ​​the perforation.

[0009] According to an embodiment of this utility model, the sensor comprises a spacer layer, upper and lower thin film layers, and a conductive material layer sandwiched between them. A perforation is formed in the spacer layer, allowing the conductive material layers on both sides to form a pressure-controlled switch structure at corresponding positions. Simultaneously, the vertical projected area of ​​at least one conductive contact is designed to be smaller than the area of ​​the perforation. When the sensor detects pressure on the substrate unit, the area of ​​the conductive contact at the perforation decreases, reducing its rigidity. Therefore, the thin film layer easily bends the conductive contact into the perforation, allowing the conductive contacts of the two conductive material layers to contact and conduct within the perforation, forming a closed circuit. This ensures the sensor's sensitivity to pressure detection.

[0010] By setting the vertical projection area of ​​the conductive contact portion to be smaller than the area of ​​the perforated hole, the amount of conductive material used can be reduced, thereby lowering costs.

[0011] In some optional embodiments, the conductive contact portion includes a conductive sheet with the same shape as the perforated hole.

[0012] Furthermore, the perforated hole is a circular hole, and the conductive sheet is a circular sheet, coaxially arranged with the perforated hole; the diameter of the conductive sheet is greater than the width of the connecting lead, but smaller than the diameter of the perforated hole.

[0013] Alternatively, the conductive contact portion further includes: a first radial segment and a second radial segment spaced apart, the first radial segment connecting the conductive sheet and the connecting lead, and one end of the second radial segment connecting the conductive sheet and the other end located outside the perforated hole.

[0014] Optionally, the conductive contact portion further includes a linear conductor, one end of which is connected to the connecting lead, and the other end of which is located outside the perforated hole.

[0015] According to some optional embodiments of the sensor in this application, the conductive material layer further includes: a widened protective sheet, the widened protective sheet being connected between the conductive contact portion and the connecting lead, wherein the outline of the hollow hole located between the conductive contact portion and the connecting lead is located on the widened protective sheet; wherein the width of the widened protective sheet is greater than the width of the connecting lead.

[0016] Furthermore, at least one of the opposite edges of the widened protective sheet is an outwardly protruding arc-shaped edge.

[0017] Furthermore, the spacer layer is also provided with an air passage that connects to at least one of the hollow holes.

[0018] According to a second aspect of the present invention, the car seat includes a seat cushion and a backrest, and the seat cushion and / or the backrest are provided with a sensor according to a first aspect of the present invention.

[0019] A vehicle according to a third aspect of the present invention includes the sensor described in the first aspect of the present invention, or includes the car seat described in the second aspect of the present invention.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the sensor (first embodiment structure) in some embodiments of the present invention;

[0023] Figure 2 This is an exploded view of the sensor (first embodiment) in some embodiments of the present invention;

[0024] Figure 3 This is a circuit diagram of the sensor (first embodiment structure) in some embodiments of the present invention;

[0025] Figure 4 This is a schematic diagram of the sensor (second embodiment structure) in some embodiments of the present invention;

[0026] Figure 5 This is an exploded view of the sensor (second embodiment structure) in some embodiments of the present invention;

[0027] Figure 6 The circuit diagrams are of the sensors (second embodiment structures) in some embodiments of this utility model;

[0028] Figure 7 This is a schematic diagram of the sensor (third embodiment structure) in some embodiments of the present invention;

[0029] Figure 8 This is an exploded view of the sensor (third embodiment) in some embodiments of the present invention;

[0030] Figure 9 This is a circuit diagram of the sensor (third embodiment structure) in some embodiments of the present invention;

[0031] Figure 10This is a schematic diagram of the sensor (fourth embodiment structure) in some embodiments of the present invention;

[0032] Figure 11 This is an exploded view of the sensor (fourth embodiment) in some embodiments of the present invention;

[0033] Figure 12 This is a circuit diagram of the sensor (fourth embodiment structure) in some embodiments of the present invention;

[0034] Figure 13 This is a schematic diagram of the sensor (fifth embodiment) in some embodiments of the present invention;

[0035] Figure 14 This is an exploded view of the sensor (fifth embodiment) in some embodiments of the present invention.

[0036] Figure label:

[0037] Sensor 100;

[0038] Inspection unit 10;

[0039] Spacer layer 11; Hole 112; Air passage 113; Air pore 1131;

[0040] Thin film layer 13;

[0041] Conductive material layer 15;

[0042] Pressure switch 151;

[0043] Conductive contact portion 152; conductive sheet 1521; linear conductor 1522;

[0044] Connect lead 153;

[0045] First radial segment 154; Second radial segment 155;

[0046] Widened protective plate 156; curved edge 1561;

[0047] Printed silver layer 1571; Printed carbon layer 1572;

[0048] Electrical connection unit 20. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0050] In the description of this utility model, it should be understood that the terms "center," "inner," and "outer," 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 utility model 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 utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] The following is for reference. Figure 1 - Figure 14 A sensor 100 according to a first aspect embodiment of the present invention is described.

[0053] A sensor 100 according to one embodiment of the present invention is used for pressure detection. When pressure is detected, the sensor 100 outputs a corresponding electrical signal. When pressure is lost, the sensor 100 returns to its initial state.

[0054] This sensor 100 can be used in various pressure detection scenarios, such as detecting seat occupancy in vehicles. When a passenger sits on the seat, the pressure on the seat triggers the sensor 100 to generate an electrical signal, thus determining that the seat is occupied. When the passenger leaves and the pressure is released, the sensor 100 signal resets, thus determining that the seat is vacant. By detecting changes in seat pressure using the sensor 100, real-time monitoring of vehicle seat occupancy can be achieved.

[0055] Specifically, the pressure sensor 100 can be placed inside the foam of the seat cushion, or in the contact layer between the seat cushion and the seat frame.

[0056] like Figure 1 , Figure 4 , Figure 7 , Figure 10 and Figure 13 As shown, the sensor 100 of this utility model embodiment includes: a detection film preparation unit 10 and an electrical connection unit 20, wherein the electrical connection unit 20 is connected to the detection film preparation unit 10.

[0057] The detection chip unit 10 acts as a sensing component, responding to changes in external pressure. Specifically, the detection chip unit is integrated into the seat cushion to respond to changes in the pressure of the seat cushion, thereby detecting in real time whether the seat is occupied.

[0058] The electrical connection unit 20 is connected to the detection plate making unit 10, and extracts the changes in electrical signals generated by the detection plate making unit 10 during the pressure or depressurization process, and connects them to external circuits, such as control modules or signal processing units, so as to realize the real-time transmission and identification of pressure status.

[0059] For example, when the detection chip unit senses that the seat is occupied and a pressure change occurs, it will output a corresponding change in electrical signal. The electrical connection unit 20 leads out the signal and transmits it to the signal processing unit in the body control module or other vehicle system modules, thereby realizing real-time identification and response to the seat occupancy status.

[0060] Specifically, such as Figure 2 , Figure 5 , Figure 8 , Figure 11 and Figure 14 As shown, the detection substrate unit 10 includes: a spacer layer 11, two thin film layers 13, and two conductive material layers 15. The spacer layer 11 has at least one perforation 112. The two thin film layers 13 are disposed on opposite sides of the spacer layer 11. The two conductive material layers 15 are located on opposite sides of the spacer layer 11, and each is disposed between the spacer layer 11 and the corresponding thin film layer 13.

[0061] With this configuration, the two conductive material layers 15 correspond one-to-one with the two thin film layers 13, and each conductive material layer 15 is located between the thin film layer 13 and the spacer layer 11 on the corresponding side.

[0062] The detection film preparation unit 10 adopts a multi-layer composite structure, which includes, in sequence: a thin film layer 13 on one side, a conductive material layer 15 on one side, a spacer layer 11, a conductive material layer 15 on the other side, and a thin film layer 13 on the other side.

[0063] Under no pressure, the two conductive material layers 15 are separated by the spacer layer 11, and they also remain separated at the corresponding positions of the cutout holes 112. At this time, the internal current path of the detection unit 10 is disconnected, and a conductive path cannot be formed, so the electrical connection unit 20 cannot detect a conductive signal.

[0064] When external pressure is applied to the surface of sensor 100, such as when a passenger sits on a vehicle seat, the two thin film layers 13 move closer to the spacer layer 11 under pressure. Simultaneously, each of the two thin film layers 13 causes its attached conductive material layer 15 to move closer together. It is worth noting that... Figure 1The spacer layer 11 and the thin film layer 13 are displayed overlapping in the projection direction, but this does not mean that they are on the same plane. In fact, the spacer layer 11 is located between the two thin film layers 13, and the detection area is formed through the perforation 112 on it. The two thin film layers 13 are respectively disposed on opposite sides of the spacer layer 11, and each is coupled with a conductive material layer 15.

[0065] Here, the thin film layer 13 is made of a material layer with good flexibility and elasticity, which can deform under small pressure and return to its initial state after the pressure is removed, and is not easily deformed.

[0066] The conductive material layer 15 is located on the side of the thin film layer 13 and can be displaced as the thin film layer 13 moves.

[0067] When pressure is applied to the detection film unit 10, the conductive material layers 15 on both sides approach and contact each other in the area corresponding to the hollow hole 112 of the spacer layer 11, so that the current path is connected, thereby causing a change in the electrical signal.

[0068] When the pressure is removed, the conductive material layers 15 on both sides separate under the action of elastic restoring force, the current path is broken, and the electrical signal is restored to the initial state.

[0069] It is worth noting that the conductive material layer 15 can take many forms. For example, the conductive material layer 15 can be flexibly selected according to cost, flexibility and process requirements.

[0070] For example, the conductive material layer 15 can be a metal wire such as copper or aluminum wire; it can also be a conductive layer formed by printing, such as a printed silver layer 1571, a printed carbon layer 1572, or a conductive ink layer. In addition, conductive fabrics, metal films, or composite conductive adhesives can also be used as material layers.

[0071] In this embodiment, the conductive material layer 15 includes a stacked printed silver layer 1571 and a printed carbon layer 1572.

[0072] As is well known to those skilled in the art, the printed silver layer 1571 has good conductivity and low contact resistance. The printed carbon layer 1572, on the other hand, is less expensive, more flexible, and possesses certain wear resistance and anti-aging properties. By using both in combination, reliable triggering of the sensor 100 can be ensured, while also balancing manufacturing cost and long-term durability.

[0073] Furthermore, the use of printed silver layer 1571 and printed carbon layer 1572 facilitates the refinement of patterns, which is beneficial for arranging fine conductive contact part 152 structure and connecting lead 153 structure in a limited space, thereby improving the reliability of the product.

[0074] Both conductive material layers 15 include conductive contact portions 152 corresponding to the same perforated hole 112 to form a pressure switch 151.

[0075] When subjected to external pressure, the conductive contact portions 152 of the two conductive material layers 15 in the area of ​​the hollow hole 112 approach each other and make contact, so that the current path is connected and the pressure switch 151 is in the open state.

[0076] When the external pressure disappears, the two conductive material layers 15 separate, the current path is broken, and the pressure switch 151 is closed.

[0077] Since the conductive contact portion 152 is only arranged in the area corresponding to the hollow hole 112, and the rest is always separated by the spacer layer 11, the triggering reliability of the sensor 100 is ensured, false triggering is avoided, and the detection accuracy is improved.

[0078] It is worth noting that sensor 100 can perform single-point detection or multi-point detection.

[0079] When the sensor 100 is used for multi-point detection, by setting multiple independent hollow holes 112 on the spacer layer 11 and configuring a pair of conductive contact parts 152 at the corresponding position of each hollow hole 112, multiple pressure sensing areas that do not interfere with each other can be realized in the same detection film unit 10, so as to meet the flexible requirements of pressure detection position and number in different application scenarios.

[0080] For example, in a vehicle seat occupancy detection system, multiple detection points can be placed in key stress areas of the seat cushion, such as the buttocks and the sides of the thighs. This helps the vehicle control system to more accurately determine whether the occupant is seated, and even distinguish between adults, children, or objects, thereby providing a reliable basis for systems such as airbag control and seat adjustment.

[0081] refer to Figure 1 , Figure 4 , Figure 7 , Figure 10 and Figure 13 Each conductive material layer 15 also includes a connecting lead 153 that connects to the conductive contact portion 152. The two conductive material layers 15 have at least two connecting leads 153 that connect to the electrical connection unit 20 to form a circuit with a pressure switch 151.

[0082] Specifically, when pressure causes the two conductive contacts 152 to touch, the pressure switch 151 is in the open state, the circuit is connected, and the electrical signal is transmitted to the electrical connection unit 20 through the connecting lead 153. When the pressure is released, the two conductive contacts 152 separate, the pressure switch 151 closes, the circuit is broken, and an electrical signal change is generated at the electrical connection unit 20.

[0083] The connecting lead 153 is directly integrated on the conductive material layer 15, which has a simple structure and is not easy to loosen.

[0084] Optionally, the connecting lead 153 and the conductive contact portion 152 located on the same side of the spacer layer 11 are the same printed silver layer 1571 or the same printed carbon layer 1572 to ensure consistent electrical characteristics and improve structural reliability.

[0085] Against this backdrop, and in view of the problem of large amounts of conductive material used in the prior art, this application has made certain optimizations to the conductive contact portion 152.

[0086] Specifically, the vertical projection area of ​​at least one conductive contact portion 152 in the conductive material layer 15 on the spacer layer 11 is smaller than the area of ​​the perforated hole 112.

[0087] This design reduces the amount of conductive material used, thereby effectively lowering costs. The material savings are even more significant when the sensor 100 incorporates multiple conductive contact portions 152. Furthermore, when multiple sensors 100 are installed in a vehicle seat, the improved design of each sensor 100 further reduces overall manufacturing costs.

[0088] Furthermore, when the optimized sensor 100 is pressed on the film preparation unit 10, the area and stiffness of the conductive contact portion 152 at the perforation 112 decrease. Therefore, the thin film layer 13 easily bends the conductive contact portion 152 into the perforation 112, allowing the conductive contact portions 152 of the two conductive material layers 15 to make contact and conduct within the perforation 112, forming a closed circuit. In this way, the sensitivity of the sensor 100 to pressure detection is ensured.

[0089] Furthermore, the conductive contact portion 152 is confined within the coverage area of ​​the perforated hole 112, thus reducing its contact area and facilitating a smaller space occupied by the sensing unit, which is beneficial for miniaturizing the sensor 100. With a smaller sensor 100, it is easier to embed it into the seat cushion or backrest of a vehicle, reducing the space occupied inside the seat, improving the space utilization rate, and also helping to avoid affecting ride comfort due to an excessively large sensor 100.

[0090] Moreover, the small-area conductive contact portion 152 requires less restoring force to separate after contact, reducing adhesion and helping to improve the sensitivity of the sensor 100.

[0091] In some alternative technical solutions, the conductive contact portion 152 can be a conductive sheet 1521, a conductive wire, or a conductive dot, conductive coating, or flexible conductive film formed by printing. Regardless of the form used, as long as the vertical projection area of ​​the conductive contact portion on the spacer layer 11 is less than the area of ​​the perforated hole 112, it will fall within the protection scope of this application.

[0092] In summary, the sensor 100 according to this embodiment of the present invention, by providing a spacer layer 11, upper and lower thin film layers 13, and a conductive material layer 15 sandwiched therebetween, and by forming a perforation 112 in the spacer layer 11, forms a pressure-controlled switch structure at corresponding positions on both sides of the conductive material layers 15. Simultaneously, the vertical projected area of ​​at least one conductive contact portion 152 is constructed to be smaller than the area of ​​the perforation 112. While ensuring detection sensitivity, this design saves on the use of conductive material, thereby reducing costs.

[0093] In some alternative embodiments, such as Figure 1 , Figure 4 , Figure 7 , Figure 10 and Figure 13 As shown, the conductive contact portion 152 includes a conductive sheet 1521 with the same shape as the perforated hole 112.

[0094] This configuration allows the upper and lower conductive contact portions 152 to achieve maximum alignment and contact when under pressure, improving the reliability of conduction and the consistency of contact area.

[0095] Furthermore, since the conductive contact portion 152 and the hollow hole 112 are shaped to match, the pressure distribution is more uniform, thereby enhancing the stability of the sensor 100 and its reliability under repeated use.

[0096] In this embodiment, the shape of the conductive sheet 1521 can be a regular or irregular shape such as a circle, ellipse, square, rectangle, or polygon.

[0097] Here, the specific shape of the conductive sheet 1521 can be selected according to the pressure distribution characteristics, trigger sensitivity requirements, and the installation space of the sensor 100.

[0098] For example, using a circular or elliptical shape for the conductive sheet 1521 facilitates uniform pressure and center alignment; using a square or polygonal shape for the conductive sheet 1521 facilitates arrangement and saves space.

[0099] Furthermore, the perforated hole 112 is a circular hole, and the conductive sheet 1521 is a circular sheet, and is coaxially arranged with the perforated hole 112.

[0100] Under pressure, the upper and lower circular conductive sheets 1521 first contact the central area and gradually expand to the periphery, so that the trigger point is concentrated at the geometric center of the hollow hole 112, thereby improving the detection sensitivity and response consistency.

[0101] Meanwhile, the circular structure itself has good stress symmetry, which can evenly disperse the local stress of the conductive sheet 1521 during the compression process, avoid material fatigue and deformation caused by stress concentration, and extend the service life of the sensor 100.

[0102] Since the conductive sheet 1521 and the perforated hole 112 are coaxially arranged, when external pressure is applied to the surface of the sensor 100, the upper and lower thin film layers 13 will deform uniformly along the central symmetrical direction, so that the two circular conductive sheets 1521 will make preferential contact in the central area of ​​the perforated hole 112, reducing contact delay or poor contact that may be caused by eccentricity, and making the pressure response more timely and stable.

[0103] The diameter of the conductive sheet 1521 is greater than the width of the connecting lead 153 and smaller than the diameter of the cutout hole 112.

[0104] First, the diameter of the conductive sheet 1521 is larger than the width of the connecting lead 153, which ensures that there is sufficient connection area between the connecting lead 153 and the conductive contact part 152, reduces contact resistance, improves the stability of current transmission, and reduces the break-circuit caused by mechanical stress concentration, thereby enhancing the reliability of long-term use.

[0105] Secondly, the diameter of the conductive sheet 1521 is smaller than the diameter of the perforated hole 112, ensuring that the vertical projection of the conductive sheet 1521 on the spacer layer 11 falls entirely within the perforated area, thus preventing its edges from contacting the spacer layer 11 and affecting the contact area. This ensures that the upper and lower conductive sheets 1521 can make full contact under pressure, maximizing the conductive area within the designed size range of the conductive contact part, thereby improving contact reliability and conductivity stability.

[0106] Alternatively, refer to Figure 1 The conductive contact portion 152 further includes: a first radial segment 154 and a second radial segment 155 spaced apart. The first radial segment 154 is connected between the conductive sheet 1521 and the connecting lead 153. One end of the second radial segment 155 is connected to the conductive sheet 1521 and the other end is located outside the hollow hole 112.

[0107] It should be noted that the first radial segment 154 and the second radial segment 155 in the above technical solution are mainly used for functional testing after the sensor 100 is manufactured. The specific testing method adopts a known testing method in the prior art. The testing equipment is connected to the exposed ends of the first radial segment 154 and the second radial segment 155 respectively, thereby verifying whether the conductive sheet 1521 is intact, whether the contact circuit is conductive, and whether there are defects such as open circuits or short circuits without damaging the finished product structure or connecting the final electrical connection unit 20.

[0108] Since the second radial segment 155 is located outside the hollow hole 112, it is always in the off state when the sensor 100 is working normally, and will not interfere with the main circuit function of the pressure switch 151, thus ensuring reliable use.

[0109] The test points for testing are integrated into the conductive contact part 152 itself, eliminating the need for additional independent test lines, further saving space, and simplifying the testing process.

[0110] Further optional, such as Figure 13 - Figure 14 As shown, the conductive contact portion 152 also includes a linear conductor 1522, one end of which is connected to the connecting lead 153, and the other end of which is located outside the hollow hole 112.

[0111] The linear conductor 1522 serves as the conductive part of the conductive contact portion 152. When the sensor 100 is pressed, the linear conductors 1522 on the upper and lower sides come into contact with each other to conduct the current path.

[0112] The linear conductors 1522 of the two conductive contact portions 152 can face the same direction. In this way, under pressure, the linear conductors 1522 on the upper and lower sides can be aligned and fully fit together in the same direction, maximizing the contact area and improving the reliability of conduction and signal stability.

[0113] Alternatively, the linear conductors 1522 of the two conductive contact portions 152 can be arranged in an alternating orientation, which can ensure effective contact in at least some areas under different force angles or eccentric pressing conditions, thereby enhancing the sensor 100's adaptability to non-central pressure or uneven loads and improving trigger sensitivity.

[0114] It should be noted that in actual working conditions, when external pressure is applied to the surface of the sensor 100, the upper and lower conductive contact parts 152 form a circuit in the area of ​​the hollow hole 112. However, during repeated pressing, the edge of the hollow hole 112 is prone to stress concentration in the connection area between the conductive contact part 152 and the connecting lead 153, causing it to break due to fatigue and affecting the service life of the sensor 100.

[0115] Therefore, in some optional embodiments of this application, reference is made to Figure 1 and Figure 2 The conductive material layer 15 further includes a widened protective sheet 156, which is connected between the conductive contact portion 152 and the connecting lead 153. The outline of the hollow hole 112 located between the conductive contact portion 152 and the connecting lead 153 is located on the widened protective sheet 156.

[0116] This design provides a wider protective plate 156 in the connection area between the conductive contact part 152 and the connecting lead 153, which can increase the stress area of ​​the connection area, disperse the mechanical stress caused by the edge of the hollow hole 112, and thus reduce the risk of cracking of the conductive material layer 15.

[0117] The width of the widened protective plate 156 is greater than the width of the connecting lead 153.

[0118] The widened protective sheet 156 forms a stress-dispersing zone between the conductive contact portion 152 and the connecting lead 153. Since the connecting lead 153 is typically narrow to save space, it and the conductive contact portion 152 are prone to fracture under repeated bending or pressure. The widened protective sheet increases the cross-sectional area and structural rigidity of this region, dispersing localized stress from the edge of the perforated hole 112, preventing stress concentration, and effectively suppressing the formation of microcracks.

[0119] Furthermore, the wider protective sheet 156 has a greater width, which can also improve the redundancy of the conductive path. Even if minor damage occurs in a localized area during long-term use, the widened area can still maintain the current path, ensuring that the sensor 100 function is uninterrupted and improving the durability and service life of the sensor 100.

[0120] Optionally, the shape of the widened protective plate 156 can be a regular or irregular shape such as a circle, ellipse, square, rectangle, or polygon.

[0121] In some further optional embodiments, at least one of the opposite side edges of the widened protective sheet 156 is an outwardly protruding arcuate edge 1561.

[0122] It is known that, compared with straight or angular edges, the curved edge 1561 eliminates geometric abrupt change points, making the stress distribution of the widened protective plate 156 more uniform under repeated pressure, thus reducing the risk of breakage.

[0123] Specifically, when the sensor 100 is under pressure, the local stress generated at the edge of the perforated hole 112 is transferred to the widened protective sheet 156 area, while the outwardly protruding arc-shaped edge 1561 can guide the stress to gradually diffuse outward along the smooth curved surface, avoiding stress concentration at right angles or sharp corners, and further improving the service life of the sensor 100.

[0124] Furthermore, the opposite edges of the widened protective sheet 156 are both outwardly protruding arc-shaped edges 1561. In this way, both sides of the widened protective sheet 156 can effectively guide stress to diffuse outward along the smooth curved surface, further avoiding local stress concentration, and improving the fatigue resistance of the conductive material layer 15 and the durability of the sensor 100.

[0125] Furthermore, combining Figure 4 and Figure 10 The spacer layer 11 is also provided with an air passage 113 that connects to at least one hollow hole 112.

[0126] By providing an air passage 113 that connects to the perforated hole 112, air can be quickly expelled from the perforated hole 112 when under pressure, reducing air resistance and allowing the upper and lower conductive contact parts 152 to make contact more quickly.

[0127] Furthermore, after the pressure is removed, external air can be replenished in time through the air passage 113, which helps the thin film layer 13 to quickly reset, so that the two conductive contacts are accurately disconnected, avoiding adhesion and improving the sensitivity of the sensor 100.

[0128] Among them, the airway 113 has a simple structure and can be constructed as a fine groove or a relatively wide channel.

[0129] In some technical solutions, the air passage 113 is provided with an air hole 1131 that extends to the outside.

[0130] Furthermore, the air passage 113 is provided with multiple spaced air holes 1131. This helps to shorten the gas flow path between the perforated hole 112 area and the outside world, accelerates the pressure equalization speed, and thus improves the response sensitivity and reset reliability of the sensor 100.

[0131] According to a second aspect of the present invention, the car seat includes a seat cushion and a backrest, and the seat cushion and / or backrest are provided with a sensor 100 according to a first aspect of the present invention.

[0132] By adopting the optimized sensor 100, not only is the cost of sensor 100 reduced, but the overall manufacturing cost of the car seat is also reduced.

[0133] Meanwhile, the sensor 100 is small in size and does not take up much space, allowing it to be embedded in the seat cushion and / or backrest without affecting the comfort of the car seat. Furthermore, the smaller size of the sensor 100 also reduces its space occupation, thereby providing installation space for other internal structures in the seat cushion and / or backrest, further improving the space utilization rate inside the car seat.

[0134] Different types of sensors 100 can be configured with different circuit structures according to actual needs: some types do not include series or parallel resistors and directly output switching signals; others introduce series or parallel resistors in specific areas to make the occupied state correspond to different resistance ranges with the unoccupied state. In this way, the sensor 100 can output diverse electrical signal characteristics to meet the differentiated needs of users. The specific circuit structure can be flexibly customized according to the user's application scenario.

[0135] like Figure 1 - Figure 3As shown, in the first embodiment of the sensor, the detection unit 10 in the sensor 100 includes four pressure switches 151: K1, K2, K3, and K4, which form a composite switch network through parallel and series connections. Multi-area occupancy detection is achieved by connecting or disconnecting the pressure switches 151.

[0136] like Figure 4 - Figure 6 As shown, in the second embodiment of sensor 100, the sensor 100 is linear overall. The detection unit 10 includes four pressure switches K5, K6, K7, and K8, corresponding to the printed detection points. K5 and K7 are connected in parallel, and K6 and K8 are connected in parallel; these two sets are then connected in series to the circuit. This structure can also achieve multi-area seat occupancy recognition through different contact combinations.

[0137] Or, combined with Figure 7 - Figure 9 In the third embodiment of sensor 100, the detection plate unit 10 in sensor 100 includes eight pressure switches K9-K16. Among them, K9 and K10, K11 and K12, K13 and K14, and K15 and K16 form parallel pairs, and then form a composite switch network through parallel and series connections.

[0138] Combined Figure 10 - Figure 12 In the fourth embodiment of the sensor 100, the detection plate unit 10 in the sensor 100 may also include ten pressure switches K17 to K26, K22-K26 in the upper region and K17-K21 in the lower region. Each contact forms a composite switch network through parallel and series connection.

[0139] In all four embodiments described above, the conductive contact portion 152 includes a central conductive sheet 1521.

[0140] Of course, this application is not limited to this, and in some other cases... Figures 13-14 In the fifth embodiment of the sensor 100 shown, the conductive contact portion 152 includes a linear conductor 1522.

[0141] Here, we can combine Figure 3 Because the fifth implementation structure of sensor 100 adopts Figure 3 The circuit schematic. Continue referring to... Figure 13 - Figure 14 The detection unit 10 in the sensor 100 includes four pressure switches 151, wherein the conductive contact portion 152 includes a linear conductor 1522.

[0142] A vehicle according to a third aspect of the present invention includes the sensor 100 of the first aspect of the present invention, or includes a car seat of the second aspect of the present invention.

[0143] It is worth noting that the type of vehicle in this application embodiment is not limited. For example, the vehicle can be a passenger car, commercial vehicle, bus, truck, special-purpose vehicle, electric motorcycle, etc. As long as the vehicle is equipped with seats and the occupant's seating status needs to be detected, the sensor 100 provided by this utility model can be used to realize seat occupancy identification.

[0144] Because of the reduced cost of sensor 100, the overall vehicle manufacturing cost has also been reduced.

[0145] The following is for reference. Figure 1 - Figure 2 , Figure 4 - Figure 5 , Figure 7 - Figure 8 , Figure 10 - Figure 11 and Figure 13 - Figure 14 Some sensors 100 according to embodiments of the present invention are described.

[0146] Example 1

[0147] Reference Figure 1 - Figure 2 , Figure 4 - Figure 5 , Figure 7 - Figure 8 , Figure 10 - Figure 11 The sensor 100 includes a detection film preparation unit 10 and an electrical connection unit 20, wherein the electrical connection unit 20 is connected to the detection film preparation unit 10.

[0148] The detection unit 10 includes: a spacer layer 11, two thin film layers 13 and two conductive material layers 15.

[0149] The spacer layer 11 has four perforated holes 112 and an air passage 113 connecting each perforated hole 112.

[0150] Two thin film layers 13 are disposed on opposite sides of the spacer layer 11.

[0151] Two conductive material layers 15 correspond one-to-one with two thin film layers 13, and each conductive material layer 15 is located between the thin film layer 13 and the spacer layer 11.

[0152] Each conductive material layer 15 includes: a conductive contact portion 152, a connecting lead 153, a first radial segment 154, a second radial segment 155, and a widened protective sheet 156.

[0153] Two conductive contact parts 152 corresponding to the same hollow hole 112 constitute a pressure switch 151.

[0154] Connecting lead 153 connects to conductive contact part 152.

[0155] Each conductive material layer 15 is connected to an electrical connection unit 20 via a connecting lead 153 to form a circuit equipped with a pressure switch 151.

[0156] The vertical projection area of ​​the conductive contact portion 152 on the spacer layer 11 is smaller than the area of ​​the perforated hole 112.

[0157] A widened protective plate 156 is connected between the conductive contact portion 152 and the connecting lead 153. The outline of the perforated hole 112 located between the conductive contact portion 152 and the connecting lead 153 is located on the widened protective plate 156. The width of the widened protective plate 156 is greater than the width of the connecting lead 153.

[0158] The opposite two sides of the widened protective plate 156 are both outwardly protruding arc-shaped edges 1561.

[0159] The conductive contact portion 152 includes a conductive sheet 1521 with the same shape as the perforated hole 112.

[0160] The perforated hole 112 is a circular hole, and the conductive sheet 1521 is a circular sheet, which is coaxially arranged with the perforated hole 112.

[0161] The diameter of the conductive sheet 1521 is greater than the width of the connecting lead 153 and smaller than the diameter of the cutout hole 112.

[0162] The first radial segment 154 is connected between the conductive sheet 1521 and the connecting lead 153.

[0163] One end of the second radial segment 155 is connected to the conductive sheet 1521, and the other end is located outside the hollow hole 112.

[0164] Example 2

[0165] Reference Figure 13 - Figure 14 The structure of this embodiment is basically the same as that of Embodiment 1, except that the conductive contact part 152 includes: a linear conductor 1522, one end of the linear conductor 1522 is connected to the connecting lead 153, and the other end of the linear conductor 1522 is located outside the hollow hole 112.

[0166] Other components of the sensor 100 according to embodiments of the present invention, such as the thin film layer 13 and the spacer layer 11, as well as its operation, are known to those skilled in the art and will not be described in detail here.

[0167] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0168] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A sensor (100) for pressure detection, characterized in that The utility model relates to a detection wafer making unit (10) and an electric connection unit (20) are connected, and the detection wafer making unit (10) comprises: A spacer layer (11) is provided with at least one hollow hole (112); Two film layers (13) are arranged on opposite sides of the spacer layer (11); Two conductive material layers (15) are arranged on opposite sides of the spacer layer (11), and each is arranged between the spacer layer (11) and the corresponding film layer (13) on the side; both the conductive material layers (15) comprise a conductive contact part (152) arranged corresponding to the same hollow hole (112) to form a pressure switch (151), and each conductive material layer (15) further comprises a connecting lead (153) connected to the conductive contact part (152); at least two connecting leads (153) of the two conductive material layers (15) are connected to the electric connection unit (20) to form a circuit provided with the pressure switch (151); At least one vertical projection area of the conductive contact part (152) on the spacer layer (11) is smaller than the area of the hollow hole (112); The conductive material layer (15) further comprises a widened protective sheet (156). The conductive contact part (152) comprises a conductive sheet (1521) with the same shape as the hollow hole (112). The hollow hole (112) is a circular hole, the conductive sheet (1521) is a circular sheet, and the conductive sheet (1521) is coaxially arranged with the hollow hole (112); 2. The sensor (100) according to claim 1, characterized in that The diameter of the conductive sheet (1521) is greater than the width of the connecting lead (153) and smaller than the diameter of the hollow hole (112).

3. The sensor (100) according to claim 2, characterized in that The conductive contact part (152) further comprises a first radial line segment (154) and a second radial line segment (155) separated from each other, the first radial line segment (154) is connected between the conductive sheet (1521) and the connecting lead (153), and one end of the second radial line segment (155) is connected to the conductive sheet (1521) and the other end is located outside the hollow hole (112). The conductive contact part (152) further comprises a linear conductive body (1522), one end of the linear conductive body (1522) is connected to the connecting lead (153), and the other end of the linear conductive body (1522) is located outside the hollow hole (112).

4. The sensor (100) according to claim 2, characterized in that The widened protective sheet (156) is connected between the conductive contact part (152) and the connecting lead (153), and the contour line between the conductive contact part (152) and the connecting lead (153) is located on the widened protective sheet (156); 5. The sensor (100) according to claim 1, characterized in that The width of the widened protective sheet (156) is greater than the width of the connecting lead (153).

6. The sensor (100) according to any one of claims 1-5, characterized in that, At least one of the opposite side edges of the widened protective sheet (156) is an outwardly convex arc-shaped edge (1561). ​ 7. The sensor (100) according to claim 6, characterized in that ​ 8. The sensor (100) according to any one of claims 1-5, characterized in that, The interval layer (11) is further provided with an air passage (113) communicating with at least one of the hollow holes (112).

9. An automobile seat characterized by comprising: The automobile seat comprises a cushion and a backrest, and the cushion and / or the backrest is provided with the sensor (100) according to any one of claims 1-8.

10. A vehicle characterized by comprising: The sensor (100) according to any one of claims 1-8 or the automobile seat according to claim 9 is included.

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