Automobile cushion sensor

Abstract

The utility model discloses an automobile cushion sensor, which belongs to the technical field of automobiles and comprises a circuit layer, the circuit layer comprises a silver paste circuit and a carbon paste circuit, a sensing unit is arranged at the tail end of the silver paste circuit, and the carbon paste circuit extends from the sensing unit along the path of the silver paste circuit to cover the surface of the silver paste circuit. The carbon paste circuit extends to the front of the output end of the silver paste circuit so as to form an avoiding area at the output end of the silver paste circuit, and the avoiding area is provided with a puncture terminal. According to the automobile cushion sensor, the problem that the output resistance is unstable due to the fact that a carbon paste circuit is broken when a terminal is punctured by an existing automobile cushion sensor is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile, especially a kind of automobile seat cushion sensor. BACKGROUND

[0002] The existing automobile seat cushion sensor generally will be set by two circuit layers, when sensor is not received pressure, two circuit layers do not contact, and there is no electric signal generation between two circuit layers, when sensor is received pressure, the degree of contact of two circuit layers can reflect the size of pressure, so as to receive different electric signals by host computer to obtain different pressure received by sensor.

[0003] The current automobile seat cushion sensor in the process of production, first by silk screen silver paste line is printed on PET substrate as to play the role of transmission electric signal, then carbon paste line full coverage is printed on silver paste line to play the role of moisture-proof, anti-oxidation and anti-aging, then silver paste line and carbon paste line form a circuit layer;After doing two circuit layers, two circuit layers are separated by adhesive middle layer and then packaged;Then metal piercing terminal is punched on the output end of each circuit layer to facilitate welding external components required in later period, such as electrical connection with host computer.But in the process of production, since carbon paste line will be full coverage on silver line, when metal piercing terminal is punched, piercing terminal will also pass through carbon paste line, and carbon paste line may be broken at the position where piercing terminal passes through, resulting in unstable output resistance phenomenon. UTILITARIAN CONTENT

[0004] In order to overcome the defects existing in the prior art, the utility model provides an automobile seat cushion sensor to solve the above problems.

[0005] The utility model solves technical scheme that it adopts: an automobile seat cushion sensor, including circuit layer, the circuit layer includes silver paste line and carbon paste line, the end of silver paste line is equipped with sensing unit, carbon paste line extends along the path of silver paste line to cover the surface of silver paste line from sensing unit, carbon paste line extends to the output end of silver paste line to form avoidance area in the output end of silver paste line, the avoidance area is equipped with piercing terminal.

[0006] Preferably, the automobile seat cushion sensor further comprises an intermediate spacer layer, and the intermediate spacer layer is provided with circuit layers on both sides.

[0007] Optionally, the intermediate spacer layer is provided with a through hole, and the sensing units corresponding to different circuit layers are located on both sides of the through hole.

[0008] Specifically, each circuit layer has multiple sensing units at the end of the silver paste lines, and the sensing units of the two circuit layers correspond one-to-one, with the two corresponding sensing units located on both sides of the same through hole.

[0009] It is worth noting that the silver paste circuit has a PET substrate on the side opposite to the carbon paste circuit.

[0010] Preferably, the car seat sensor further includes an injection molded part that covers the output terminal of the silver paste circuit.

[0011] The beneficial effect of this utility model is that, in the car seat sensor, by shortening the length of the carbon paste line, a position for piercing the terminal is exposed at the output end of the silver paste line. In this way, when the piercing terminal is inserted into the output end of the silver paste line, the integrity of the carbon paste line will not be affected, thereby avoiding contact between the carbon paste line and the piercing terminal and affecting the resistance value output from the output end to the host computer. Attached Figure Description

[0012] Figure 1 This is a structural view of a car seat cushion sensor in one embodiment of the present invention;

[0013] Figure 2 for Figure 1 An enlarged schematic diagram of the dashed circle A;

[0014] Figure 3 This is a schematic diagram of the circuit layer structure in one embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the structure of the intermediate spacer layer in one embodiment of the present invention;

[0016] Figure 5 This is an exploded view of a car seat cushion sensor in one embodiment of the present invention;

[0017] In the diagram: 1. Circuit layer; 11. Silver paste circuit; 12. Carbon paste circuit; 13. Sensing unit; 14. PET substrate; 2. Intermediate spacer layer; 21. Through hole; 3. Piercing terminal; 4. Injection molded part. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] like Figures 1-5As shown, a car seat cushion sensor comprises a circuit layer 1, the circuit layer 1 comprises a silver paste circuit 11 and a carbon paste circuit 12, the silver paste circuit 11 is provided with a sensing unit 13 at the end, the carbon paste circuit 12 extends along the path of the silver paste circuit 11 from the sensing unit 13 to cover the surface of the silver paste circuit 11, the carbon paste circuit 12 does not cover the sensing unit 13, ensuring that the sensing unit 13 can contact the sensing unit 13 of another layer of circuit layer under pressure, the carbon paste circuit 12 extends to the output end of the silver paste circuit 11, ensuring that the carbon paste circuit 12 does not extend to the output end of the silver paste circuit 11, so as to form a avoiding area at the output end of the silver paste circuit 11, the avoiding area is provided with a piercing terminal 3.

[0020] In the car seat cushion sensor, by shortening the length of the carbon paste circuit 12, the position where the silver paste circuit 11 leaks out can be pierced by the piercing terminal 3, so that when the piercing terminal 3 is pierced into the output end of the silver paste circuit 11, the integrity of the carbon paste circuit 12 is not affected, thereby avoiding the carbon paste circuit 12 contacting the piercing terminal 3 and affecting the resistance value output by the output end to the host computer.

[0021] Preferably, the car seat cushion sensor further comprises an intermediate separation layer 2, and the two sides of the intermediate separation layer 2 are provided with the circuit layer 1. The sensing unit 13 of the two circuit layers 1 is separated by the intermediate separation layer 2, and the silver paste circuit 11 of the two circuit layers 1 is in an open circuit relationship under the condition that the sensing unit 13 is not under pressure.

[0022] Optionally, the intermediate separation layer 2 is provided with a through hole 21, and the sensing units 13 corresponding to different circuit layers 1 are located on the two sides of the through hole 21. Under the condition that the sensing unit 13 is under pressure, the sensing unit 13 will pass through the through hole 21 and contact the sensing unit 13 of the other layer of circuit layer 1, so that the silver paste circuit 11 of the two circuit layers 1 is in communication, so that the electrical signal output by the output end to the host computer can reflect the current pressure, and the electrical signal can reflect the current resistance value.

[0023] Specifically, the end of the silver paste circuit 11 of each circuit layer 1 is provided with a plurality of sensing units 13, and the sensing units 13 of the two circuit layers 1 correspond one by one, and the corresponding two sensing units 13 are located on the two sides of the same through hole 21. By providing a plurality of sensing units 13, the sensing units 13 can be distributed at a plurality of positions under the car seat cushion, so that the pressure detection is more comprehensive and the covered position is wider. In this embodiment, the corresponding two sensing units 13 contact each other and can output an electrical signal reflecting the current pressure to the host computer at the output end.

[0024] It is worth mentioning that the silver paste circuit 11 is provided with a PET substrate 14 on the side away from the carbon paste circuit 12. The PET substrate 14 can protect the silver paste circuit 11.

[0025] Preferably, the automobile cushion sensor further comprises an injection molding part 4, which wraps the output end of the silver paste circuit 11. The output end of the silver paste circuit 11 is wrapped by injection molding, thereby protecting the output end and the piercing terminal 3. In addition, the injection molding part 4 is provided with an opening on the side away from the silver paste circuit 11, and the end of the piercing terminal 3 away from the silver paste circuit 11 is inserted into the opening, thereby facilitating the electrical connection between the piercing terminal 3 and the external required elements, such as the upper computer.

[0026] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. An automotive seat cushion sensor, characterized by: The circuit layer comprises silver paste circuit and carbon paste circuit, the end of the silver paste circuit is provided with a sensing unit, the carbon paste circuit extends along the path of the silver paste circuit from the sensing unit to cover the surface of the silver paste circuit, the carbon paste circuit extends to the output end of the silver paste circuit to form an avoiding area at the output end of the silver paste circuit, and the avoiding area is provided with a piercing terminal.

2. The automotive seat cushion sensor according to claim 1, wherein: The automobile cushion sensor further comprises an intermediate separation layer, and the intermediate separation layer is provided with the circuit layers on both sides.

3. The automotive seat cushion sensor of claim 2, wherein: The intermediate separation layer is provided with a through hole, and the sensing units corresponding to different circuit layers are located on both sides of the through hole.

4. The automotive seat cushion sensor of claim 3, wherein: The end of the silver paste circuit of each circuit layer is provided with a plurality of sensing units, the sensing units of the two circuit layers correspond to each other, and the corresponding two sensing units are located on both sides of the same through hole.

5. The automotive seat cushion sensor of claim 1, wherein: The side of the silver paste circuit away from the carbon paste circuit is provided with a PET substrate.

6. The automotive seat cushion sensor of claim 1, wherein: The automobile cushion sensor further comprises an injection molding part, and the injection molding part wraps the output end of the silver paste circuit.

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