CN201425869Y

CN201425869Y - Force sensing resistor

Info

Publication number: CN201425869Y
Application number: CN2008201577976U
Authority: CN
Inventors: 杨恺; 汪新
Original assignee: SHANGHAI PUCKA ELECTRONIC Inc
Current assignee: SHANGHAI PUCKA ELECTRONIC Inc
Priority date: 2008-12-25
Filing date: 2008-12-25
Publication date: 2010-03-17
Anticipated expiration: 2018-12-25

Abstract

The utility model discloses a force sensing resistor, which belongs to the application field of film circuit in pressure sensing area. The force sensing resistor is characterized in that it is composed of three superimposed layers. The low resistance conducting layer substrate in comb-like or labyrinth-like pattern is silk printed at the inside of the upper layer, the carbon film conducting layersubstrate is coated or silk printed at the lower layer, and a insulating layer with holes corresponding to the carbon film conducting layer in size. The utility model applies to the electronic equipments that need to contact pressure control with lower accuracy requirement, such as automated electronic instruments, medical equipments, electronic musical instruments, electronic games, etc. The utility model is a low-cost pressure sensor.

Description

The resistance of power electrification

Technical field

The utility model relates to a kind of power electrification resistance, belongs to the application of thin film circuit aspect pressure sensing.

Background technology

At automation electronic instrument, Medical Devices, electronic musical instrument, need more pressure sensor in the instrument and equipments such as electronic game machine, but pressure sensor structure complexity in the market, price is expensive, can not satisfy that some are not high to required precision, but the more use occasion that quantity is used.

Summary of the invention

The utility model is to have the pressure sensor structure complexity now in order to overcome, and the shortcoming that price is expensive provides a kind of power electrification as pressure sensor simple in structure, that cost is low to hinder.

The technical solution of the utility model is, a kind of power electrification resistance, be characterized in that it is formed by stacking up and down by three layers, the low resistance conductive layer substrate of inboard silk-screen pectination in upper strata or labyrinth-like pattern, lower floor scribbles or silk-screen has carbon film conductive layer substrate, and the centre is lined with one deck and has insulating barrier with the corresponding hole of carbon film conductive layer size.

The beneficial effects of the utility model are simple in structure as the resistance of the power electrification of pressure sensor, and cost is low, can satisfy not high but the more occasion that quantity is used of required precision.

Description of drawings

Fig. 1 is power electrification resistance embodiment 1 schematic diagram: wherein

Fig. 1 a is a low resistance conductive layer substrate schematic diagram;

Fig. 1 b is a carbon film conductive layer substrate schematic diagram;

Fig. 1 c is the intermediate insulating layer schematic diagram;

Fig. 2 is power electrification resistance embodiment 2 schematic diagrames: wherein

Fig. 2 a is a low resistance conductive layer substrate schematic diagram;

Fig. 2 b is a carbon film conductive layer substrate schematic diagram;

Fig. 2 c is the intermediate insulating layer schematic diagram;

Fig. 3 is power electrification resistance three-decker profile;

Fig. 4 is pressure f-impedance R variation relation figure.

Embodiment

By Fig. 1, Fig. 2 and shown in Figure 3, a kind of power electrification resistance, be characterized in that it is formed by stacking up and down by three layers, the low resistance conductive layer substrate of inboard silk-screen pectination in upper strata or labyrinth-like pattern, lower floor scribbles or silk-screen has carbon film conductive layer substrate, and the centre is lined with one deck and has insulating barrier with the corresponding hole of carbon film conductive layer size.

The shape of described power electrification resistance can be geometry arbitrarily such as rectangle, circle, ring-type or strip.Described intermediate insulating layer can be the laminar insulating barrier that has viscose glue that forms through machining, also can be the insulating barrier that forms by the silk-screen dielectric ink.

Operation principle of the present utility model is: by exerting pressure in the power electrification resistance region of interest as pressure sensor, on making accordingly, the lower conductiving layer contact, contact-making surface resistance and the contact pressure relation of being inversely proportional to because of the carbon film layer, output output resistance at transducer changes with the size variation of exerting pressure thus, Changing Pattern: pressure ↑ resistance value ↓, application of the present utility model: press by finger or other application of force method at the corresponding site of transducer, the resistance of its corresponding output can change, when the power that applies becomes big, then the resistance of output diminishes, diminish otherwise work as the power that applies, then the resistance of output becomes big.Its Changing Pattern approximate reverse is seen Fig. 4 than rate curve.

Embodiment 1:

By shown in Figure 1, Fig. 1 a is a low resistance conductive layer substrate schematic diagram, the low resistance conductive layer of the inboard silk-screen pectination pattern of layer, Fig. 1 b is a carbon film conductive layer substrate schematic diagram, scribble on the layer or silk-screen has the carbon film conductive layer of monoblock rectangle, Fig. 1 c is the intermediate insulating layer schematic diagram, has and the corresponding rectangular opening of carbon film conductive layer size on the layer.

Embodiment 2:

By shown in Figure 2, Fig. 2 a is a low resistance conductive layer substrate schematic diagram, the low resistance conductive layer of the inboard silk-screen rice of layer palace shape pattern, Fig. 2 b is a carbon film conductive layer substrate schematic diagram, scribble on the layer or silk-screen has carbon film conductive layer with the corresponding a plurality of circles of low resistance conductive layer, Fig. 2 c is the intermediate insulating layer schematic diagram, has on the layer and the corresponding circular hole of a plurality of circular dimension sizes of carbon film conductive layer.

Two above-mentioned embodiment, superimposed mode is identical, be formed by stacking up and down by three layers equally, as shown in Figure 3, upper strata (also can be lower floor) is for being printed on low resistance conductive layer substrate 1, and lower floor's (also can be the upper strata) is for being printed on carbon film conductive layer substrate 3, and is middle for having the insulating barrier 2 with the corresponding hole of carbon film conductive layer size, 4 is the carbon film conductive layer, and 5 is the low resistance conductive layer.Described low resistance is below 40 ohm.

The utility model is applicable to needs contact pressure to control electronic equipment that required precision is not high such as automation electronic instrument, Medical Devices, electronic musical instrument, electronic game machine etc.The utility model is a kind of pressure sensor cheaply.

Claims

1. power electrification resistance, it is characterized in that it is formed by stacking up and down by three layers, the low resistance conductive layer substrate of inboard silk-screen pectination in upper strata or labyrinth-like pattern, lower floor scribbles or silk-screen has carbon film conductive layer substrate, and the centre is lined with one deck and has insulating barrier with the corresponding hole of carbon film conductive layer size.

2. power electrification resistance according to claim 1 is characterized in that described intermediate insulating layer is laminar insulating barrier that has viscose glue that forms through machining or the insulating barrier that forms by the silk-screen dielectric ink.