Novel passenger pressure sensor

Abstract

The utility model discloses a novel passenger pressure sensor, and relates to the technical field of automobile seats. The passenger pressure sensor comprises a detection sheet production unit and an electric connection unit. One end of a first thin film layer in the detection sheet-making unit extends outwards along the length direction of the detection sheet-making unit, and an electric connection area exposed out of the spacing layer and the second thin film layer is formed at the tail end of the first thin film layer; the electric connection area is provided with at least two circuit connection ends; the electric connection unit comprises a circuit board structure located at one end of the electric connection unit. At least two first conductive parts are arranged on the circuit board structure; and the first conductive part and the circuit connecting end realize first-first contact conduction through at least one fixing structure, so that conduction of the detection sheet production unit and the electric connecting unit is realized, and a detection loop is formed. The device can effectively reduce the frequency and possibility of using errors of the external resistor module, and improves the assembly convenience and assembly efficiency.

Description

Technical Field

[0001] The present disclosure generally relates to the field of automotive seat technology, and more particularly to a novel occupant pressure sensor. Background Art

[0002] Currently, vehicles such as cars are equipped with occupant occupancy sensors that automatically detect the presence of drivers and passengers in vehicle seats and can distinguish between objects and human bodies, thereby providing seat occupancy signals to various devices.

[0003] The occupant pressure sensors for automotive seats on the market are mainly based on membrane switch structures. The product realizes the detection function by connecting the detection production unit and the wiring harness. The current connection method of the detection production unit and the wiring harness is mainly assembled and connected by terminal crimping, and then the resistance module is arranged according to the detection point circuit.

[0004] However, this makes the assembly steps very cumbersome, which is not conducive to the production efficiency and automation of the occupant pressure sensor. At the same time, when producing products with resistor components, metal film ceramic resistors are generally used. However, resistors of the same power but different resistance values ​​have basically the same appearance and size. During operation, they are often taken or placed incorrectly, resulting in performance failure of the product. Therefore, we propose a new type of occupant pressure sensor. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a new occupant pressure sensor that reduces the frequency of incorrect use of an external resistor and is easy to produce.

[0006] The present application provides a novel occupant pressure sensor, comprising:

[0007] A detection film unit, the detection film unit comprising a first film layer, a spacer layer, and a second film layer arranged in sequence; the first film and the second film are both provided with a conductive material on a side adjacent to the spacer layer; one end of the first film layer extends outward along the length of the detection film unit and forms an electrical connection region at its distal end that is exposed outside the spacer layer and the second film layer; the electrical connection region has at least two circuit connection terminals;

[0008] An electrical connection unit, the electrical connection unit comprising: a circuit board structure located at one end of the electrical connection unit; at least two first conductive parts are provided on the circuit board structure; the circuit board structure and the electrical connection area are fixed by at least one fixed structure so that the first conductive parts are in one-to-one contact with the circuit connection end, thereby achieving conduction between the detection production unit and the electrical connection unit to form a detection circuit.

[0009] According to the technical solution provided in this application, at least one first connection hole is opened on the electrical connection area;

[0010] At least one second connection hole is provided on the circuit board structure, and the second connection hole is arranged corresponding to the first connection hole; the second connection hole and the first connection hole are used to cooperate with the fixing structure to fix the detection and production unit and the electrical connection unit.

[0011] According to the technical solution provided in this application, the fixing structure is a rivet or a bolt and nut or a buckle or a terminal or a clip.

[0012] According to the technical solution provided in the present application, the fixing structure has a fixing surface in contact with the upper surface of the first film layer, and a buffer structure is provided on the fixing surface.

[0013] According to the technical solution provided in this application, the circuit board structure is a printed circuit board or a flexible circuit board.

[0014] According to the technical solution provided in this application, a preset resistance module is provided on the circuit board structure.

[0015] According to the technical solution provided in the present application, at least two second conductive parts are further provided on the circuit board structure, and the second conductive parts are used to conduct with external electrical components through wiring harnesses or terminals.

[0016] According to the technical solution provided in this application, the first conductive part, the preset resistance module and the second conductive part can be distributed on the same side of the circuit board structure, or one of them and the other two can be distributed on both sides of the circuit board structure.

[0017] According to the technical solution provided in the present application, the edge of the spacer layer close to the electrical connection area extends along the length direction of the detection film unit to form an extension section that exceeds the length of the second film layer;

[0018] The edge of the circuit board structure close to the first film layer is arranged in cooperation with the extension section to reduce damage to the circuit board structure and the detection and production unit.

[0019] According to the technical solution provided in the present application, a protective shell is also included; the circuit board structure, the connection between the circuit board structure and the detection and production unit, and the connection between the circuit board structure and the wiring harness are all arranged in the protective shell, and the protective shell is used to protect the connection stability between the circuit board structure and the detection and production unit.

[0020] In summary, the present technical solution specifically discloses a novel occupant pressure sensor. The occupant pressure sensor comprises: a detection film unit and an electrical connection unit; the detection film unit comprises a first film layer, a spacer layer, and a second film layer arranged in sequence; conductive material is provided on the side of the first film and the second film near the spacer layer; one end of the first film layer extends outward along the length direction of the detection film unit and forms an electrical connection region at its end that is exposed outside the spacer layer and the second film layer; the electrical connection region has at least two circuit connection terminals; the electrical connection unit comprises: a circuit board structure located at one end of the electrical connection unit; at least two first conductive parts are provided on the circuit board structure; the circuit board structure and the electrical connection region are fixed by at least one fixing structure so that the first conductive parts are in one-to-one contact with the circuit connection terminals, thereby achieving conduction between the detection film unit and the electrical connection unit, forming a detection circuit.

[0021] When producing products with resistor modules, existing passenger pressure sensors primarily connect the detection unit and wiring harness by crimping terminals, making the entire assembly process very cumbersome and facilitating fully automated production. In view of this, in this application, the circuit board structure in the electrical connection unit is used as the conductive component, and a fixing structure is used to fix the circuit board structure to the first conductive portion and circuit connection end of the detection unit. This achieves contact and conduction between the detection unit and the electrical connection unit, greatly improving assembly simplicity and efficiency, and providing advantages in achieving fully automated production process design. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 This is a structural diagram of a new type of occupant pressure sensor.

[0024] Figure 2 This is a schematic diagram of the assembly of the detection production unit and PCB circuit board in a new type of occupant pressure sensor.

[0025] Figure 3 The figure is a structural diagram of the detection and production unit in a new type of occupant pressure sensor.

[0026] Figure 4 The diagram below is a schematic diagram of the circuit board structure in a new type of occupant pressure sensor.

[0027] Figure 5 This is a schematic diagram of the use of the first fixing structure in a new type of occupant pressure sensor.

[0028] Figure 6This is a schematic diagram of the use of the second fixing structure in a new type of occupant pressure sensor.

[0029] Figure 7 This is a schematic diagram of the first buffer structure corresponding to the fixed structure in a new type of occupant pressure sensor.

[0030] Figure 8 This is a schematic diagram of the second buffer structure corresponding to the fixed structure in a new type of occupant pressure sensor.

[0031] Figure 9 This is a schematic diagram of the third buffer structure corresponding to the fixed structure in a new type of occupant pressure sensor.

[0032] Figure 10 This is a schematic diagram of the installation of the third buffer structure corresponding to the fixed structure in a new type of occupant pressure sensor.

[0033] Figure 11 This is a schematic diagram of the first state of the first film layer in a new type of occupant pressure sensor.

[0034] Figure 12 This is a schematic diagram of the second state of the first film layer in a new type of occupant pressure sensor.

[0035] Figure 13 Schematic diagram of the third state of the first film layer in a new type of occupant pressure sensor.

[0036] Figure 14 This is a schematic diagram of the first structural structure of a circuit board in a new type of occupant pressure sensor.

[0037] Figure 15 This is a circuit diagram corresponding to the first structure of the circuit board structure.

[0038] Figure 16 This is a schematic diagram of the second structure of the circuit board structure in a new type of occupant pressure sensor.

[0039] Figure 17 This is a circuit diagram corresponding to the second structure of the circuit board.

[0040] Figure 18 This is a schematic diagram of the third structural structure of the circuit board in a new type of occupant pressure sensor.

[0041] Figure 19 This is a circuit diagram corresponding to the third structure of the circuit board structure.

[0042] Figure 20 This is an overall schematic diagram of a new type of occupant pressure sensor.

[0043] Numbers in the figure: 1. Detection and production unit; 11. Electrical connection area; 12. Conductive material; 111. Circuit connection end; 13. First film layer; 14. Spacer layer; 141. Extension section; 15. Second film layer; 16. Printed circuit layer; 17. First connection hole; 2. Electrical connection unit; 21. Circuit board structure; 22. Preset resistance module; 23. First conductive part; 24. Second connection hole; 25. Second conductive part; 26. Signal conducting part; 5. Wiring harness; 6. Controller; 3. Fixing structure; 31. Buffer structure; 4. Protective shell. DETAILED DESCRIPTION

[0044] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0045] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] Please refer to Figure 1 and Figure 2 The present embodiment provides a schematic structural diagram of a novel occupant pressure sensor and a schematic diagram of the assembly of a detection production unit and a PCB circuit board. To address the problems of existing occupant pressure sensors, such as complex assembly and frequent incorrect use of external resistors, which can easily lead to product performance failure, the present embodiment provides a novel occupant pressure sensor, which includes:

[0047] Detection production unit 1, detection production unit 1 includes a first film layer 13, a spacer layer 14, and a second film layer 15 arranged in sequence; the first film 13 and the second film 14 are both provided with a conductive material 12 on the side close to the spacer layer 14, and one end of the first film layer 13 extends outward along the length direction of the detection production unit 1 and forms an electrical connection area 11 at its end, which is exposed outside the spacer layer 14 and the second film layer 15. The electrical connection area 11 has at least two circuit connection terminals 111;

[0048] The electrical connection unit 2 includes: a circuit board structure 21 located at one end of the electrical connection unit 2; at least two first conductive parts 23 are provided on the circuit board structure 21; the circuit board structure 21 and the electrical connection area 11 are fixed by at least one fixing structure 3, so that the first conductive parts 23 are in contact with the circuit connection ends 111 one by one, thereby realizing the conduction between the detection production unit 1 and the electrical connection unit 2 and forming a detection circuit.

[0049] The occupant pressure sensor is used to automatically detect the presence of the driver and passengers on the seats of a vehicle, and can distinguish between objects and human bodies, such as a seat belt unfastened reminder system, a vehicle safety system, or a comfort adjustment system. In this embodiment, the occupant sensor mainly includes two parts: a detection film unit 1 and an electrical connection unit 2. Among them, the detection film unit 1 includes a first film layer 13, a spacer layer 14, and a second film layer 15 arranged in sequence, and a conductive material 12 is provided on the side of the first film 13 and the second film 14 close to the spacer layer 14. The conductive material 12 is equivalent to the circuit switch structure on the two film layers, which is used to connect the two electrodes after contact is achieved at the corresponding film sensing position when the detection film unit 1 is pressurized.

[0050] Furthermore, an electrical connection area 11 exposed outside the spacer layer 14 and the second thin film layer 15 is formed at one end of the detection production unit 1. The electrical connection area 11 is used to achieve contact electrical connection with the electrical connection unit 2, thereby forming a conductive detection circuit; here, the electrical connection area 11 has two circuit connection ends 111 insulated from each other formed by a conductive material 12, wherein the conductive material 12 can be a silver layer and a carbon layer, and the carbon layer can also protect the silver layer from oxidation. In addition, the conductive material 12 can also be formed by other conductive substances.

[0051] Next, at least two first conductive parts 23 insulated from each other are provided on the circuit board structure 21 located at one end of the electrical connection unit 2. The two first conductive parts 23 are respectively contacted and fixed to the circuit connection end 111 through the fixing structure 3. After the first conductive part 23 and the circuit connection end 111 are in contact and conductive, it is equivalent to detecting that the film-making unit 1 and the electrical connection unit 2 have completed conductive connection, thereby forming a detection circuit. Here, the first conductive part 23 can be in the form of a conductive material coating or a terminal fixed on the circuit board structure 21.

[0052] It should be explained that the above-mentioned "production sensing position" specifically refers to the position of at least one conductive hole opened on the spacer layer 14; in actual application scenarios, when the first film 13 is subjected to external pressure, the conductive material 12 of the first film 13 and the conductive material 12 on the second film 14 will contact in at least one conductive hole, and realize conduction after contact at the production sensing position. At this time, it is equivalent to detecting that the circuit switch at the production unit 1 is in the on state. Then, when the production unit 1 and the electrical connection unit 2 are also turned on, the overall detection circuit is turned on, and the corresponding electrical signal can be output to the outside.

[0053] In a preferred embodiment, see Figure 13 、 Figure 15 、 Figure 17 as well as Figure 19 , at least one first connection hole 17 is opened on the circuit connection end;

[0054] At least one second connection hole 24 is formed on the circuit board structure 21 , and the second connection hole 24 is corresponding to the first connection hole 17 . The second connection hole 24 and the first connection hole 17 are used to cooperate with the fixing structure 3 to fix the detection and production unit 1 and the electrical connection unit 2 .

[0055] Among them, the first connection hole 17 can be cut by a punching machine, a laser machine or a vibrating knife and other process equipment. Specifically, a single hole can be cut multiple times separately, or multiple holes can be cut at one time. In the specific cutting process, if the first connection hole 17 is cut by a fully automatic punching machine, the equipment will automatically track the marking symbol on the first film layer 13 (the marking symbol can be "cross", "center point", "M", etc.) to ensure the accuracy of the film punching. For details, please refer to Figure 11 and Figure 12 The marker symbol form shown.

[0056] At the same time, a second connection hole 24 corresponding to the first connection hole 17 needs to be planned on the circuit board structure 21. After the second connection hole 24 is opened, space for arranging the first conductive part 23 is reserved around the hole. In this way, the fixing structure 3 can pass through the second connection hole 24 corresponding to the first connection hole 17 in sequence to fix the electrical connection area 11 to the circuit board structure 21.

[0057] In a preferred embodiment, the fixing structure 3 is a rivet, a bolt, a nut, a screw, a buckle, a terminal, or a clip.

[0058] Since the circuit board structure 21 and the electrical connection area 11 are in contact conduction, the circuit board structure 21 and the electrical connection area 11 need to be fixed with the help of the fixing structure 3, which can further improve the ease of assembly. For example, the fixing structure 3 can be in the form of any fixing component such as a rivet, a bolt and a nut, a clip, a terminal, or a clip. The form of the rivet or the bolt and the nut can be respectively referred to in Figure 5 and Figure 6 It should be explained that the fixing structure 3 adopts the form of extrusion to fix the detection film-making unit 1 and the circuit connection unit 2. Its specific form is not limited to the above-mentioned example structure and can be adjusted depending on the actual production process.

[0059] Among them, if the fixing structure is selected as a rivet, the rivet can be a hollow rivet or a solid rivet structure, the material of the rivet can be metal or non-metallic material, and the rivet can be assembled by rotary riveting or press riveting; if it is a non-metallic material, it can also be assembled by ultrasonic welding or other methods, and there is no specific limitation.

[0060] In a preferred embodiment, see Figure 7-10The fixing structure 3 has a fixing surface in contact with the upper surface of the first film layer 13 , and a buffer structure 31 is provided on the fixing surface.

[0061] The buffer structure 31 is arranged on the end face where the fixed structure 3 needs to contact the first film layer 13, and is used to reduce the damage and destruction of the first film layer 13 by the fixed structure 3 during the fixed connection, and to avoid breaking the conductive structure on the first film layer 13. Specifically, the structural form of the buffer structure 31 can be a plurality of protrusions or groove structures arranged in a ring on the fixed surface, or a flat rounded corner structure arranged at the edge of the fixed surface, or a plurality of spaced notch structures arranged around the periphery of the fixed surface, which are used to reduce the contact area of ​​the fixed surface with the first film layer 13, or reduce the impact force of the edge of the fixed surface on the first film layer 13. In the actual design process, the form of the fixed structure 3 can be designed according to the process requirements, and there is no specific limitation.

[0062] In a preferred embodiment, the circuit board structure 21 is a printed circuit board or a flexible circuit board.

[0063] Printed circuit boards, also known as PCBs, usually use glass fiber reinforced epoxy resin as a base material and have a certain degree of hardness and rigidity. Flexible circuit boards, also known as FPCs, usually use flexible materials such as polyimide (PI) and polyester (PET), which can be bent and folded. The specific selection method can be selected according to actual process requirements.

[0064] In a preferred embodiment, see Figure 16 and Figure 18 A preset resistance module 22 is provided on the circuit board structure 21 .

[0065] The circuit board structure 21 serves as an electrical connection and conduction component between the electrical connection unit 2 and the detection production unit 1, so the preset resistor can be fixed on the circuit board structure 21 in advance according to the set connection form and required resistance and other parameters. This is equivalent to standardizing the circuit board structure 21 in the early stage of assembly, avoiding the frequent occurrence of resistors being taken or placed incorrectly during assembly operations, and is also more conducive to automated product production and accelerated production rhythm.

[0066] Specifically, the circuit design of the circuit board structure 21 can be in different forms such as a single loop without resistance, a single loop with resistance, or a dual loop with resistance, and can be adjusted according to the design of the early detection point circuit.

[0067] For example, Figure 14 The single circuit without resistance state shown, or Figure 16 The single circuit with resistance state (series, parallel resistance or only series resistance or only parallel resistance) shown or Figure 18The arrangement of the dual-loop structure state (one without resistance and one with resistance) is shown.

[0068] It is not difficult to find that the number of circuit connection terminals 111 varies under different circuit designs. In the case of a single circuit, two circuit connection terminals should be formed on the electrical connection area 11; if it is a double circuit, four circuit connection terminals will be formed on the electrical connection area 11 accordingly (see Figure 13 ), based on different design forms, the number of the first conductive parts 23 will also be adjusted accordingly, and is not limited to the number listed in this embodiment.

[0069] In a preferred embodiment, see Figure 4 At least two second conductive parts 25 are also provided on the circuit board structure 21. The second conductive parts 25 are used to conduct with external electrical components through the wiring harness 5 or terminals.

[0070] The second conductive part 25 can be in the form of a conductive material coating or a terminal fixed on the circuit board structure 21, and the specific form is not limited. The external electrical components include: a wiring harness 5 / terminal and a controller 6. The controller 6 is used to collect or receive and feedback the electrical signal generated by the detection production unit 1. The wiring harness 5 or the terminal is used to connect to the second conductive part 25. In the actual process, if the second conductive part 25 is in the form of a conductive material coating, the assembly method between the circuit board structure 21 and the wiring harness 5 is to strip the wiring harness head and tin the second conductive part 25 to fix it. Finally, a conductive circuit relationship is established among the detection production unit 1, the circuit board structure 21, and the controller 6. This can save conductive materials and is conducive to platform-based and automated production.

[0071] Specifically, when the second conductive part 25 is used to conduct electricity with an external electrical component through a terminal, the terminal can be integrally provided with the second conductive part 25, or the terminal can be connected to the second conductive part 25 at a later time. The terminal can be directly inserted into the plastic box to form a connector for connecting with a docking connector of an external electrical component.

[0072] Combine Figure 15 、 Figure 17 as well as Figure 19As can be seen from the above introduction to the circuit design of the circuit board structure 21, the positive and negative electrode access terminals and the pins PIN1, PIN2, PIN3 and PIN4 in the circuit schematic diagram are the connection nodes of the corresponding number of second conductive parts 25 and the wiring harness 5 / terminal, which are used to achieve conduction with external electrical components; and the switch mark in the circuit schematic diagram represents the conduction state of the detection production unit 1; when the circuit design is single-point conduction, if the conductive material 12 of the first film 13 and the conductive material 12 on the second film 14 are pressurized and contacted in a set conductive hole and then conductive, the circuit switch is in a closed state; correspondingly, if the conductive material 12 of the first film 13 and the conductive material 12 on the second film 14 are not in contact in the conductive hole, the circuit switch is in an open state. In the case where the circuit is designed to be dual-point conductive, the conductive material 12 of the first film 13 and the conductive material 12 on the second film 14 need to be pressurized and contacted in at least two conductive holes independently arranged on the left and right sides of the spacer layer 14 to be conductive, and the circuit switch will be in a closed state; accordingly, if the conductive material 12 of the first film 13 and the conductive material 12 on the second film 14 are in contact only in one conductive hole or are not in contact in both conductive holes, then the circuit switch will be in an open state.

[0073] For the setting of the preset resistance module in the circuit, please refer to Figures 14-19 From the circuit diagram, it can be seen that whether or not a resistance module is provided will directly affect the expression form of the detection electrical signal; Figure 17 For example, if at this time, the detection production unit 1 is pressurized and turned on, the circuit switch is closed, and the detection circuit will only detect R1; if the detection production unit 1 is not turned on, the circuit switch is disconnected, and the detection circuit will detect R1+R2; at this point, the detection circuit can determine whether there are drivers and passengers on the seats according to the different detection results; in addition, if the preset resistance module 22 is not provided, the detection result can be based on whether the circuit is turned on or not (see Figure 15 );by Figure 19 For example, due to Figure 19 The corresponding circuit design is Figure 18 , so it has two loops, one of which is a resistance-free loop (see Figure 19 The other is a resistor circuit with R4 and R3 in series and parallel (see Figure 19 In actual application scenarios, the two circuits can provide detection functions for different modules of the vehicle. In this case, the detection results can be based on whether the circuit is conductive or not and the detected resistance value; specifically, for Figure 19 For the resistance-free loop in the upper frame, when the circuit switch is closed, the circuit is conductive, and when the circuit switch is open, the circuit is not conductive; Figure 19The resistance loop in series and parallel with R4 and R3 in the lower frame detects R4+R3 when the circuit switch is closed, and detects R3 when the circuit switch is open.

[0074] In a preferred embodiment, the first conductive portion 23 , the preset resistance module 22 and the second conductive portion 25 may be distributed on the same side of the circuit board structure 21 , or one of them and the other two may be distributed on opposite sides of the circuit board structure 21 .

[0075] The design of the first conductive portion 23, the preset resistance module 22 and the second conductive portion 25 can be reasonably arranged according to the specifications of the current circuit board structure 21. If the area of ​​the circuit board structure 21 is small, in order to avoid short circuit, one of the first conductive portion 23, the preset resistance module 22 and the second conductive portion 25 can be arranged on a different side of the circuit board structure 21 (see Figure 4 If the area of ​​the circuit board structure 21 is large enough, the first conductive portion 23, the preset resistance module 22 and the second conductive portion 25 can be arranged on the same side.

[0076] Specifically, the preset resistor module 22 includes a resistor and a circuit connecting the resistor to the first conductive portion 23 and the second conductive portion 25. The resistor and circuit are integrated on the circuit board structure 21, which is modular and standardized. Using this circuit board structure 21 to connect with the production and detection unit 1 reduces the original cumbersome process steps, reduces the risk of misconnection, and reduces the use of conductive materials.

[0077] In a preferred embodiment, see Figure 3 、 Figure 5 and Figure 6 The edge of the spacer layer 14 close to the electrical connection area 11 extends along the length direction of the detection film production unit 1 to form an extension section 141 that exceeds the length of the second film layer 15;

[0078] The edge of the circuit board structure 21 close to the first film layer 13 is arranged in cooperation with the extension section 141 to reduce damage to the circuit board structure 21 and the detection and production unit 1 .

[0079] Since the various layers of film in the detection production unit are made of flexible materials, after the first film layer 13 and the circuit board structure 21 are squeezed and fixed by the fixing structure 3, the edge of the circuit board structure 21 close to the first film layer 13 is located exactly on the lower side of the extension section 141 of the spacer layer 14. In this way, using the spacer layer 14 as a buffer layer can effectively reduce the damage caused by the circuit board structure 21 to the conductive material 12 on the first film layer 13.

[0080] In a preferred embodiment, see Figure 20The occupant pressure sensor also includes a protective shell 4; the circuit board structure 21, the connection between the circuit board structure 21 and the detection production unit 1, and the connection between the circuit board structure 21 and the wiring harness 5 are all arranged in the protective shell 4, and the protective structure 4 is used to protect the connection stability between the circuit board structure 21 and the detection production unit 1.

[0081] After the circuit board structure 21 and the detection production unit 1 are squeezed and fixed using the fixing structure 3, in order to protect the stability and safety of the occupant pressure sensor, the connection stability of the circuit board structure 21, the connection between the circuit board structure 21 and the detection production unit 1, and the connection between the circuit board structure 21 and the wiring harness 5 must be ensured, so they should all be set in the protective shell 4. In addition to being the structure of the shell connector, the protective shell 4 can also be a coated colloid block obtained by injection molding, and there is no special limitation on the specific details.

[0082] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A new type of occupant pressure sensor, characterized in that: include: A detection film production unit (1), the detection film production unit (1) comprising a first film layer (13), a spacer layer (14), and a second film layer (15) arranged in sequence; a conductive material (12) is provided on one side of the first film (13) and the second film (14) close to the spacer layer (14); one end of the first film layer (13) extends outward along the length direction of the detection film production unit (1) and an electrical connection area (11) is formed at its end and is exposed outside the spacer layer (14) and the second film layer (15); the electrical connection area (11) has at least two circuit connection ends (111); An electrical connection unit (2), the electrical connection unit (2) comprising: a circuit board structure (21) located at one end of the electrical connection unit (2); at least two first conductive parts (23) are provided on the circuit board structure (21); the circuit board structure (21) and the electrical connection area (11) are fixed to each other via at least one fixing structure (3), so that the first conductive parts (23) are in one-to-one contact with the circuit connection end (111), thereby achieving conduction between the detection production unit (1) and the electrical connection unit (2), and forming a detection circuit.

2. A novel occupant pressure sensor according to claim 1, characterized in that: At least one first connection hole (17) is provided on the electrical connection area (11); At least one second connection hole (24) is provided on the circuit board structure (21), and the second connection hole (24) is arranged corresponding to the first connection hole (17); the second connection hole (24) and the first connection hole (17) are used to cooperate with the fixing structure (3) to fix the detection and production unit (1) and the electrical connection unit (2).

3. A novel occupant pressure sensor according to claim 2, characterized in that: The fixing structure (3) is a rivet, a bolt, a nut, a screw, a buckle, a terminal, or a clip.

4. A novel occupant pressure sensor according to claim 3, characterized in that: The fixing structure (3) has a fixing surface in contact with the upper surface of the first film layer (13), and a buffer structure (31) is provided on the fixing surface.

5. The novel occupant pressure sensor according to claim 3 is characterized in that: The circuit board structure (21) is a printed circuit board or a flexible circuit board.

6. A novel occupant pressure sensor according to claim 1 or 5, characterized in that: A preset resistance module (22) is provided on the circuit board structure (21).

7. The novel occupant pressure sensor according to claim 5, characterized in that: At least two second conductive parts (25) are also provided on the circuit board structure (21), and the second conductive parts (25) are used to conduct with external electrical components through a wiring harness (5) or a terminal.

8. The novel occupant pressure sensor according to claim 6, characterized in that: The first conductive portion (23), the preset resistance module (22), and the second conductive portion (25) can be distributed on the same side of the circuit board structure (21), or one of them and the other two can be distributed on both sides of the circuit board structure (21).

9. The novel occupant pressure sensor according to claim 1, characterized in that: The edge of the spacer layer (14) on the side close to the electrical connection area (11) extends along the length direction of the detection film production unit (1) to form an extension section (141) that exceeds the length of the second film layer (15); The edge of the circuit board structure (21) close to the first film layer (13) is arranged in cooperation with the extension section (141) to reduce damage to the circuit board structure (21) and the detection film-making unit (1).

10. The novel occupant pressure sensor according to claim 6, characterized in that: The invention also includes a protective shell (4); the circuit board structure (21), the connection between the circuit board structure (21) and the detection and production unit (1), and the connection between the circuit board structure (21) and the wiring harness (5) are all arranged in the protective shell (4); the protective shell (4) is used to protect the connection stability between the circuit board structure (21) and the detection and production unit (1).

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