CN208313478U - A kind of novel pressure sensor - Google Patents

Abstract

A kind of novel pressure sensor, including the first pressure sensitivity layer, second pressure sensitivity layer, and it is folded in the separation layer between the first pressure sensitivity layer and the second pressure sensitivity layer, the first pressure sensitivity layer includes the first induction zone and the first conductive bar for being connected to the first induction zone, the second pressure sensitivity layer includes the second induction zone and the second conductive bar for being connected to the second induction zone, first conductive bar, second conductive bar is located at the opposite sides of the pressure sensor, first conductive bar, the first induction zone is stretched out in the end of second conductive bar respectively, except second induction zone, as output end, the utility model pressure sensor is according to first, the tightness degree of second induction zone contact changes the output resistance of sensor, piezoresistive characteristic it is linear more preferable, it is sensitiveer；In addition complicated conducting wire is substituted using two conductive bars, and easy to process, it is low in cost.

Description

A kind of novel pressure sensor

Technical field

The utility model relates to sensor technical fields, more particularly to a kind of novel pressure sensor.

Background technique

Pressure sensor is usually made of substrate with electrode and pressure sensitivity material, wherein pressure sensitivity material be elastic material and The mixture of conductive material has certain elasticity；Electrode is generally silver paste route, is formed in substrate by printing, etching etc. On.It is contacted in use, the compression of pressure sensitivity material is deformed with the formation of silver paste circuit, with the contact area of film and silver paste route Increase, electric current between film and silver paste route increases, to change the output resistance of device.

On the one hand the pressure sensor of above structure it is high to form silver paste circuit processing cost itself, it is also necessary to external metal Terminal forms connecting interface, and manufacturing cost is high；Another aspect silver paste circuit wear no resistance and it is easy to oxidize, it is difficult to it is full The harsh use environment of foot.

Utility model content

In view of this, providing a kind of sensitive and durable and low-cost novel pressure sensor.

A kind of novel pressure sensor, including the first pressure sensitivity layer, the second pressure sensitivity layer and it is folded in the first pressure sensitivity layer and Separation layer between two pressure sensitivity layers, the first pressure sensitivity layer include the first induction zone and are connected to the first of the first induction zone Conductive bar, the second pressure sensitivity layer include the second induction zone and the second conductive bar for being connected to the second induction zone, and described One conductive bar, the second conductive bar end stretched out except the first induction zone, the second induction zone respectively, as output end.

Preferably, first induction zone is resistance carbon oil.

Preferably, second induction zone is resistance carbon oil.

Preferably, first conductive bar is pasted on the first induction zone by conductive double sided adhesive tape, second conductive bar It is pasted on the second induction zone by conductive double sided adhesive tape.

Preferably, second conductive bar is copper chaff.

Preferably, first conductive bar is copper chaff.

Preferably, being also formed with dielectric ink on the first induction zone.

Preferably, the dielectric ink is the lattice-like of discrete distribution.

Preferably, being also formed with dielectric ink on second induction zone.

Preferably, the separation layer is double-adhesive tab, it is in closed middle empty frame shape.

Compared to the prior art, the utility model pressure sensor is in contact by first/second induction zone compressive deformation And be connected, change the output resistance of sensor according to the tightness degree of first/second induction zone contact, piezoresistive characteristic It is linear more preferable, it is sensitiveer；In addition silver paste circuit is substituted using two conductive bars, structure is more simple and practical, and is not necessarily to additional riveting It connects metal terminal and forms connecting interface, not only make the consistency of sensor good but also easy to process, it is low in cost.

Detailed description of the invention

Fig. 1 is the schematic diagram according to the novel pressure sensor of an embodiment of the present invention.

Fig. 2 is the explosive view of sensor shown in Fig. 1.

Fig. 3 is the original state schematic diagram of sensor shown in Fig. 1.

Fig. 4 is the status diagram that sensor shown in Fig. 1 is pressurized.

Specific embodiment

The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model, It states.One or more embodiments of the utility model are illustratively given in attached drawing, so that disclosed in the utility model The understanding of technical solution is more accurate, thorough.However, it should be understood that the utility model can be with many different forms To realize, however it is not limited to embodiments described below.

Fig. 1 show the novel pressure sensor of one specific embodiment of the utility model, and the sensor includes the first pressure Feel layer 10, the second pressure sensitivity layer 20 and the separation layer 30 being located between the first pressure sensitivity layer 10 and the second pressure sensitivity layer 20.

Please refer to Fig. 2, the first pressure sensitivity layer 10 includes first base material 12, first be formed in first base material 12 Resistance carbon oil 14 and the first conductive bar 16 being connected on first resistor carbon oil 14.The first base material 12 is preferably The thin film flexibles material such as PET, PI, FR4 has certain flexibility.First base material 12 is rectangular thin in the present embodiment Piece, one first convex block 13 of the protruding formation in one angle.The first resistor carbon oil 14 is formed in by techniques such as printing, sprayings On the surface of first base material 12, it is dimensioned slightly smaller than first base material 12, the first convex block 13 is not covered by first resistor carbon oil 14.Institute First resistor carbon oil 14 is stated as induction zone, there is certain initial resistance value.

First conductive bar 16 is fixed on first resistor carbon oil 14 and is electrically connected with first resistor carbon oil 14, preferably Ground first conductive bar 16 is copper chaff.In the present embodiment, lead between first conductive bar 16 and first resistor carbon oil 14 Conductive double sided adhesive tape connection is crossed, is electrically connected while forming mechanical connection.First conductive bar 16 is elongated structures, It is arranged close to a long side of first resistor carbon oil 14.The length of first conductive bar 16 is slightly larger than first resistor carbon oil 14 Length, both ends are extend out to except first resistor carbon oil 14.Preferably, first conductive bar 16 is set to first base material 12 It is formed with the side of the first convex block 13, one end 17 of the first conductive bar 16 is extend out on the first convex block 13, and one as sensor A output end.

Preferably, it is also formed with dielectric ink 18 by the techniques such as printing or spraying on the first resistor carbon oil 14, this Dielectric ink 18 is discrete lattice structure in embodiment, is distributed on first resistor carbon oil 14 evenly and at intervals.

The second pressure sensitivity layer 20 include the second substrate 22 and be formed in second resistance carbon oil 24 on the second substrate 22, And it is connected to the second conductive bar 26 on second resistance carbon oil 24.Second substrate 22 is preferably PET, PI, FR4 etc. thin Film flexible material has certain flexibility.In the present embodiment the second substrate 22 be rectangular thin slice, size, shape with First base material 12 is suitable.One jiao of second substrate 22, one second convex block 23 of protruding formation.The second resistance carbon oil 24 are used as induction zone, are formed on the surface of the second substrate 22 by the techniques such as printing, spraying, are dimensioned slightly smaller than the second substrate 22, the second convex block 23 is not covered by second resistance carbon oil 24.

Second conductive bar 26, such as copper chaff be fixed on second resistance carbon oil 24 by conductive double sided adhesive tape item and with Second resistance carbon oil 24 is electrically connected.Second conductive bar 26 is elongated structures, close to a long side of second resistance carbon oil 24 Side setting.The length of second conductive bar 26 is slightly larger than the length of second resistance carbon oil 24, and both ends extend out to second resistance Except carbon oil 24.Preferably, second conductive bar 26 is set to the side that the second substrate 22 is formed with the second convex block 23, the One end 27 of two conductive bars 26 is extend out on the second convex block 23, the another output as sensor.

The separation layer 30 is double-adhesive tab material, and two sides all has good viscosity.In the present embodiment, the isolation Whole layer 30 is in hollow closing box shape, and outer dimension matches with first base material 12, the second substrate 22.

When assembling, the first pressure sensitivity layer 10, separation layer 30,20 sequence of the second pressure sensitivity layer are stacked, wherein on the first pressure sensitivity layer 10 First resistor carbon oil 14, the second resistance carbon oil 24 on the second pressure sensitivity layer 20 respectively for separation layer 30 opposite sides face, The second conductive bar 26 on the first conductive bar 16, the second pressure sensitivity layer 20 on first pressure sensitivity layer 10 is located at the phase of separation layer 30 To two long sides, two output ends 17,27 are located at the both ends of the same short side of separation layer 30, can directly soldering conducting wire formed Lead-out wire.First pressure sensitivity layer 10 and the second pressure sensitivity layer 20 are bonded as one by the separation layer 30, and by the first pressure sensitivity layer 10 with Second pressure sensitivity layer 20 is spaced apart, and deformation space 40 is formed between first resistor carbon oil 14, second resistance carbon oil 24, such as Fig. 3 institute Show.

As shown in figure 4, the utility model sensor is when in use, apply pressure F in (or the second substrate of first base material 12 22) make its deformation on, first resistor carbon oil 14 (or second resistance carbon oil 24) is driven to be deformed recessed, the first, second resistance Carbon oil 14,24 forms contact.Pressure F is bigger, and the deformation extent of first/second resistance carbon oil 14/24 is bigger, the first, second electricity The contact area of resistance carbon oil 14,24 is bigger, contact tightness degree is higher, and the electric current flowed through is bigger, as shown by the arrows in Figure 4, two Resistance between output end 17,27 is smaller；Otherwise pressure F is smaller, and the deformation extent of first/second resistance carbon oil 14/24 is smaller, The contact area of first, second resistance carbon oil 14,24 is smaller, contact tightness degree is lower, and the electric current flowed through is smaller, two output ends 17, the resistance between 27 is bigger.After pressure F removal, first/second resistance carbon oil 14/24 restores deformation, is separated from each other, defeated Infinite between outlet 17,27, to obtain the corresponding relationship between pressure and resistance.

The utility model pressure sensor is deformed first/second resistance carbon oil 14/24 by force, thus the two It contacts and is connected, change the output resistance of sensor according to the tightness degree that first/second resistance carbon oil 14/24 contacts, obtain Pressure and resistance corresponding relationship, piezoresistive characteristic it is linear more preferable, it is sensitiveer.And the utility model pressure sensor is set It sets two conductive bars 16,26 and draws output end 17,27 outward, no matter the pressure position on sensor is in which position, electricity The stroke of stream is all the distance between output end 17,27 of two conductive bars 16,26, so that the consistency of sensor is good；And it leads Electric item 16,26 is directly attached on resistance carbon oil 14,24, easy to process relative to silver paste circuit, low in cost；And it is conductive Directly lead-out wire can be formed by soldering conducting wire on the output end 17,27 of item 16,26, form connection without additional riveting metal terminal Interface further reduced processing cost, be particularly suitable for the scene that large scale incudes on a large scale.

In addition, the utility model pressure sensor is formed with dielectric ink 18 on first resistor carbon oil 14, such as Fig. 3 institute Show, the dielectric ink 18 provides support between first resistor carbon oil 14 and second resistance carbon oil 24, makes first resistor carbon oil 14 are in isolation with second resistance carbon oil 24 in its natural state, prevent sensor under no pressure or low-pressure state It connects；As shown in figure 4, when sensor compression contacts the first, second resistance carbon oil 14,24 and is connected, dielectric ink 18 Pressure and frictional force between the first, second resistance carbon oil 14,24 of support and dispersion, to improve the wearability and stabilization of sensor Property.And dielectric ink 18 is lattice-like, can ignore its influence to the first, second resistance carbon oil 14,24 contacts area substantially. It should be understood that ground, the dielectric ink 18 can also be formed on second resistance carbon oil 24, or it is formed simultaneously in the first, second electricity It hinders on carbon oil 14,24.

Still further, the separation layer 30 of the utility model pressure sensor uses closed hollow frame-shaped construction, can both protect It demonstrate,proves and forms sufficiently large deformation space 40 between the first, second resistance carbon oil 14,24, while there is splendid waterproof performance, protect Demonstrate,prove the electrical safety of sensor.Therefore, the utility model pressure sensor can satisfy harsh use environment, be widely used in All trades and professions.

It should be noted that the utility model is not limited to above embodiment, creation essence according to the present utility model Mind, those skilled in the art can also make other variations, these variations done according to the creative spirit of the utility model, all Should be included in the utility model it is claimed within the scope of.

Claims (10)

1. a kind of novel pressure sensor, including the first pressure sensitivity layer, the second pressure sensitivity layer and it is folded in the first pressure sensitivity layer and second Separation layer between pressure sensitivity layer, it is characterised in that: the first pressure sensitivity layer includes the first induction zone and is connected to the first sense First conductive bar in area is answered, the second pressure sensitivity layer includes the second induction zone and the second conduction for being connected to the second induction zone Item, first conductive bar, the second conductive bar are located at the opposite sides of the pressure sensor, first conductive bar, The end of second conductive bar is stretched out respectively except the first induction zone, the second induction zone, as output end.

2. novel pressure sensor as described in claim 1, which is characterized in that first induction zone is resistance carbon oil.

3. novel pressure sensor as described in claim 1, which is characterized in that second induction zone is resistance carbon oil.

4. novel pressure sensor as described in claim 1, which is characterized in that first conductive bar passes through conductive double sided adhesive tape It is pasted on the first induction zone, second conductive bar is pasted on the second induction zone by conductive double sided adhesive tape.

5. novel pressure sensor as claimed in claim 4, which is characterized in that second conductive bar is copper chaff.

6. novel pressure sensor as claimed in claim 4, which is characterized in that first conductive bar is copper chaff.

7. novel pressure sensor as described in claim 1, which is characterized in that be also formed with insulating oil on the first induction zone Ink.

8. novel pressure sensor as claimed in claim 7, which is characterized in that the dielectric ink is the dot matrix of discrete distribution Shape.

9. novel pressure sensor as claimed in claim 6, which is characterized in that be also formed with insulation on second induction zone Ink.

10. novel pressure sensor as described in claim 1, which is characterized in that the separation layer is double-adhesive tab, in envelope The middle empty frame shape closed.