CN206406777U - Load detection sensor unit - Google Patents

Abstract

The utility model provides a kind of load detection sensor unit.The load detection sensor unit (1A) is configured under seat cushion (SC), and it possesses load detection sensor (5), and the load detection sensor possesses：Sensor chip (50), it has resinous a pair of insulating trips (56s, 57s), the 1st electrode (56e) being arranged on the face of the insulating trip (56s) of an opposed side for the pair of insulating trip and 2nd electrode (57e) paired with the 1st electrode；Metallic plate (60), it is arranged at the position at least overlapping with the 1st electrode and the 2nd electrode in the face of a side of sensor chip；Load detection sensor is also equipped with pressing component (4), the press section (46) that the pressing component has the side opposite with sensor chip side for being configured at metallic plate and pressed metallic plate.Fitted than seat cushion (SC) hard, sensor chip with metallic plate by adhesive layer (70) press section.

Description

Load detection sensor unit

Technical field

The utility model is related to load detection sensor unit, it is adaptable to the situation that suitably detection is taken one's seat etc..

Background technology

As one of security system in vehicle, using having what the situation of non-wear safety belt while taking a bus was alerted Warning system.In the warning system, in the case that the state taken one's seat for perceiving people does not perceive the wearing of safety belt, Give a warning.As the device that is perceived of taking one's seat to the people, exist using being detected to the load caused by taking one's seat The situation for detection means of taking one's seat.

It is used as detection means of taking one's seat, it is known to use the load detection sensor with following structure：It is formed between opening Spacing body is configured between a pair of resinous films, and the electrode formed on each film is in the opening of distance piece mutually across rule Fixed interval and it is opposed (with reference to following patent documents 1).

Patent document 1：Japanese Unexamined Patent Publication 09-315199 publications

But, resinous film generally there are if temperature rise if intensity decreases and because low force bend trend.Therefore, If being placed in the in-car of the automobile under the hot sunlight environment of high temperature like that, there are the intensity decreases of resinous film Situation.In this case, exist put on even if the load lighter than the load of common people seat unit also error detection to take one's seat Worry.

Utility model content

Therefore, the purpose of this utility model is to provide a kind of load that suitably can be detected and take one's seat etc. and accordingly apply The load detection sensor unit of lotus.

In order to solve above-mentioned problem, load detection sensor unit configuration of the present utility model is under seat cushion, above-mentioned load Detection sensor unit is characterised by possessing load detection sensor, and the load detection sensor possesses sensor chip and gold Belong to plate, wherein, the sensor piece have resinous a pair of insulating trips, be arranged at it is mutually opposing in above-mentioned a pair of insulating trips The 1st electrode and configuration 2nd electrode paired between above-mentioned a pair of insulating trips and with above-mentioned 1st electrode of one side in face；Gold Category plate is arranged at the portion at least overlapping with above-mentioned 1st electrode and above-mentioned 2nd electrode in the face of a side of the sensor piece Position, above-mentioned load detection sensor unit is also equipped with pressing component, the pressing component have be configured at above-mentioned metallic plate with biography The opposite side in sensor piece side and the press section pressed above-mentioned metallic plate, above-mentioned press section than above-mentioned seat cushion hard, on Sensor chip is stated to fit by adhesive layer with above-mentioned metallic plate.

In such load detection sensor unit, in the case where metallic plate pressed portion is pressed, the metallic plate is scratched It is bent and cause resinous sensor chip bend and make the 1st electrode and the 2nd electrode contact or make the 1st electrode and the 2nd electrode it Between resistance value capacitance variation so that load detection sensor is connected, and then detect load.

Press section is than seat cushion hard, because metallic plate is pressed by the press section, so directly being pressed with metallic plate by seat cushion Situation compare, metallic plate can be made suitably to bend, be taken one's seat so as to suitably detect.In addition, metal is compared with resin It is difficult to produce creep, therefore is also difficult to leave impression in metallic plate even if pressed portion pressing.Therefore, detect and sense in the load In device unit, the error detection with the load accordingly applied such as take one's seat as caused by impression can be suppressed, as a result, can fit The load that locality detection accordingly applies with taking one's seat etc..

However, with metal phase it is more flexible than resin it is easy changed according to the change of environment temperature, therefore exist and easily produce Creep and the trend for also easily leaving impression.But, in the load detection sensor unit, because metal is passed with resinous The surface side of one side of sensor piece is fitted by adhesive layer, so being released from the pressing carried out by press section, metallic plate is returned During to position when not pressing, metallic plate can make resinous sensor chip be back to the position.Therefore, detected in the load In sensor unit, in the case of the variation of ambient temperature around the load detection sensor unit, it is also difficult to Resinous sensor chip leaves impression, so as to suppress as caused by the impression with the load that accordingly applies such as take one's seat Error detection.As a result, the load accordingly applied such as suitably can detect and take one's seat.

It is preferred that, be also equipped with pedestal, in pedestal configuration the sensor piece at least than above-mentioned 1st electrode and above-mentioned by the The wide block of 2 electrodes.

Additionally, it is preferred that, the sensor piece is formed as：It is in the pedestal opposed faces opposed with above-mentioned pedestal, at least with it is upper The peripheral part for stating the 1st electrode and the overlapping region of above-mentioned 2nd electrode is not bonded in above-mentioned pedestal, wherein, above-mentioned pedestal Opposed faces are the faces of the opposite side in the face with being pasted with above-mentioned metallic plate of the sensor piece.

There is following trend in the case of sensor chip of the configuration on pedestal with pedestal bonding, i.e.,：Sensor chip Bond site is pressed even if the flexure because of metallic plate to be also difficult to deform, the only upper side local deformation of the sensor chip.With This is relative, the peripheral part in the region at least overlapping with the 1st electrode and the 2nd electrode in the pedestal opposed faces of sensor chip That is, in the case that peripheral part is not bonded in pedestal, the peripheral part when the flexure because of metallic plate is pressed easily with The mode floated is deformed.Therefore, in this case, at least the 1st electrode and above-mentioned 2nd electrode perimeter part are easily to follow gold The mode of flexure mode for belonging to plate is deformed, as a result, the load accordingly applied such as suitably can detect and take one's seat.

Additionally, it is preferred that, configure the whole above-mentioned pedestal opposed faces of sensor chip on above-mentioned pedestal not with above-mentioned pedestal Bonding.

In this case, due to configuring the overall easy flexure side to follow metallic plate of the sensor chip on pedestal The mode of formula is deformed, so can easily make sensor chip be deformed in the way of further following metallic plate in pressing.

Additionally, it is preferred that, the above-mentioned zone and above-mentioned pedestal for configuring the sensor chip on above-mentioned pedestal are bonded, above-mentioned zone Above-mentioned pedestal opposed faces in addition are overall not to be bonded with above-mentioned pedestal.

In the case where the region overlapping with the 1st electrode and above-mentioned 2nd electrode is by bonding, suppress the relative of sensor chip In the skew of pedestal.Therefore, it is possible to suppress the sensor chip as caused by sensor chip relative to the skew of pedestal and metallic plate The skew of relative position.Therefore, it is possible to suppress even if metallic plate from press section is depressed, load detection sensor is also disconnected Undesirable condition.On the other hand, due to the position beyond the region overlapping with the 1st electrode and above-mentioned 2nd electrode it is overall not with Pedestal is bonded, so when being pressed as described above, sensor chip can easily follow the side of the flexure mode of metallic plate Formula is deformed.

Additionally, it is preferred that, the phase of the sensor piece and above-mentioned pedestal that are also equipped with the direction to above-mentioned pedestal opposed faces To the mobile movement restricting member limited.

In this case, even if the overall non-adhering of sensor chip of the configuration on pedestal, also suppresses the phase of sensor chip For the skew of pedestal.Therefore, it is possible to suppress even if metallic plate from press section is depressed, load detection sensor is also disconnected Undesirable condition.

Additionally, it is preferred that, above-mentioned movement restricting member is inserted through the insertion in the sensor piece and the formation of above-mentioned pedestal Hole.

In this case, the skew relative to pedestal of sensor chip is easily suppressed.

Additionally, it is preferred that, above-mentioned movement restricting member is a part for above-mentioned pressing component.

In this case, press section and the skew of the 1st electrode and the position relationship of the 2nd electrode, therefore energy are suppressed Enough suppress even if the undesirable condition also disconnected from the depressed load detection sensor in the press section.

Additionally, it is preferred that, above-mentioned pressing component, which has, is formed as bigger than the area that above-mentioned press section is contacted with above-mentioned metallic plate Area and bear the roof of the pressing from above-mentioned seat cushion.

Because the area of press section of the area than being contacted with metallic plate for the roof for bearing the pressing from seat cushion is big, so The pressing force from seat cushion can be made to concentrate on press section by the roof, so as to more suitably make metal plate benging. Therefore, it is possible to more suitably detect load.

Additionally, it is preferred that, above-mentioned roof is formed as than above-mentioned 1st electrode and the above-mentioned great area of 2nd electricity, above-mentioned pressing Portion is formed as than above-mentioned 1st electrode and the small area of above-mentioned 2nd electrode.

By making press section be formed as than the 1st electrode and the small area of the 2nd electrode, so as to make by pressing component Roof concentrates on the pressing force of the press section not dispersedly to the 1st electrode and the 2nd electrodes transfer.

Additionally, it is preferred that, the thickness of above-mentioned adhesive layer more than 10 μm, and in above-mentioned a pair of insulating trips and adhesive layer Less than 0.8 times of the thickness of the insulating trip of contact.

In this case, whether in high temperature environments or at low ambient temperatures, load can suitably be detected Lotus.

Additionally, it is preferred that, the front end of above-mentioned press section is formed as the curve form of convex.

In this case, compared with being formed as the situation of flat shape with front end, it can make from press section towards load The pressing force that detection sensor applies is concentrated.Therefore, in the case that the metallic plate of load detection sensor is thicker wait, from The pressing force that press section is subject to is difficult in the state of being transmitted to load detection sensor, also can suitably detect load.

Additionally, it is preferred that, the front end of above-mentioned press section is formed as flat shape.

In this case, compared with the situation that front end is formed as the curve form of convex, load detection sensor from The pressing force that press section is subject to is disperseed, therefore makes the adhesive layer that sensor chip is fitted with metallic plate in the load detection sensor It is difficult to escape to side because of the pressing of press section.Accordingly, it is difficult to leave impression in adhesive layer, followed as a result, also reducing The situation of impression is left in metallic plate adhesive layer.

Additionally, it is preferred that, the sensor piece has also between above-mentioned a pair of insulating trips to be provided with and above-mentioned a pair of electrodes The distance piece of corresponding opening, the area of the flat shape of the front end of above-mentioned press section is in 3.0mm²More than, and opened above-mentioned Less than 0.8 times of the area of mouth.

In the case where the male of heavier-weight is seated etc. and to be applied with excessive load, applied from press section towards metallic plate Big power, the part of the pressed portion pressing of metallic plate produces plastic deformation sometimes, can not suitably examine in this case Survey load.On the other hand, by the area of the flat shape of the front end that makes press section in 3.0mm²More than, and in the opening Less than 0.8 times of area, so that the part that can either more suppress the pressed portion pressing of metallic plate produces plastic deformation, and energy The undesirable condition for enough preventing pressing force from excessively disperseing and causing load detection sensor to be not turned on.

As described above, according to the utility model, there is provided a kind of load that suitably can be detected and take one's seat etc. and accordingly apply The load detection sensor unit of lotus.

Brief description of the drawings

Fig. 1 is the exploded view of the structure for the load detection sensor unit for representing the 1st embodiment.

Fig. 2 is to represent that load detection sensor unit is installed on the sectional view of the appearance of S-shaped spring.

Fig. 3 is the figure that pressing component is represented with the viewpoint different from Fig. 1.

Fig. 4 is the exploded view of load detection sensor.

Fig. 5 is the figure of the appearance for the on-state for representing load detection sensor.

Fig. 6 is in the case of representing to press load detection sensor for the press section of flat shape using front end The chart of experimental result.

Fig. 7 is to represent that the load with front end as the press section of the curve form of convex is detected with Fig. 2 identical viewpoints The figure of sensor unit.

Fig. 8 is the feelings for representing to press load detection sensor for the press section of the curve form of convex using front end The chart of experimental result under condition.

Fig. 9 is to represent the figure of the load detection sensor unit of the 2nd embodiment with Fig. 2 identical viewpoints.

Figure 10 is the appearance of a part for the 1st insulating trip from the opposed surface side front opposed with the mounting surface of pedestal Figure.

Figure 11 is the figure of the pressing component of another embodiment from upper surface side.

The explanation of reference

1A, 1B ... load detection sensor unit；2 ... pedestals；4 ... pressing components；5 ... load detection sensors；46、 146 ... press sections；49 ... ribs；50 ... sensor chips；56 ... the 1st electrode slices；The electrodes of 56e ... the 1st；The insulating trips of 56s ... the 1st； 57 ... the 2nd electrode slices；The electrodes of 57e ... the 2nd；The insulating trips of 57s ... the 2nd；58 ... distance pieces；60 ... metallic plates；SC ... seat cushions；SW… Switch.

Embodiment

Hereinafter, referring to the drawings preferred embodiment entering to the load detection sensor unit involved by the utility model Row detailed description.In addition, in order to make it easy to understand, to there is the engineer's scale of each figure different from the engineer's scale described in the following description Situation.

(1) the 1st embodiment

Fig. 1 is the exploded view of the structure for the load detection sensor unit for representing the 1st embodiment, and Fig. 2 is to represent load Detection sensor unit is installed on the sectional view of the appearance of the S-shaped spring of seat unit.In addition, Fig. 2 be seat unit along The sectional view of load detection sensor unit on the face of left and right directions.As shown in Figure 1 and Figure 2, load detection sensor unit 1A Possess pedestal 2, pressing component 4 and load detection sensor 5 as main structure.

Load detection sensor 5 possesses：With by the 1st electrode 56e and the 2nd electrode 57e the switch SW constituted and having Flexible sensor chip 50；Metallic plate 60；And the adhesive layer 70 for bonding sensor chip 50 and metallic plate 60.Utilize adhesive layer 70 fit sensor chip 50 with metallic plate 60.

Sensor chip 50 is the thin film switch of sheet, and it has main piece of 50m of general rectangular and is connected with main piece of 50m And tail block 50t narrow than main piece 50m of width.It is provided with main piece of 50m by opening that the 1st electrode 56e and the 2nd electrode 57e are constituted Close SW.In addition, being formed with the blade part 50f of wider width in tail block 50t.In addition, being formed about on main piece of 50m each summit Through hole 50H.

As shown in Fig. 2 metallic plate 60 is pasted on the face of a side of sensor chip 50 by adhesive layer 70.In present embodiment In, the face of the seat cushion SC sides of the seat unit in the main piece of 50m as a part for sensor chip 50 that is, seat cushion side 50mcs, is pasted with metallic plate 60.In addition, seat cushion side 50mcs be included in the direction orthogonal with seat cushion side 50mcs on and 1st electrode 56e of sensor chip 50 and the overlapping regions of the 2nd electrode 57e, on the seat cushion side 50mcs comprising the region It is pasted with metallic plate 60.That is, in the case of the observation seat cushion side 50mcs of front, the 1st electrode 56e and 57e, the 2nd electrode The scope position in the inner part surrounded in the ratio on the direction orthogonal with the thickness direction of metallic plate 60 by the side of metallic plate 60.

Adhesive layer 70 is the part for the stratiform that sensor chip 50 is fitted with metallic plate 60.Adhesive layer 70 can be arranged at biography Entirety between sensor piece 50 and metallic plate 60, can also be arranged at a part.But, adhesive layer 70 is being arranged at sensor In the case of a part between piece 50 and metallic plate 60, at least by the adhesive layer 70 be arranged in a thickness direction with it is described later The overlapping region in the press section 46 of pressing component 4.Furthermore it is preferred that also adhesive layer 70 is arranged at electric with the 1st in a thickness direction Pole 56e and the overlapping regions of the 2nd electrode 57e.As the material of the adhesive layer 70, as long as can be by sensor chip 50 and metal Plate 60 is fitted, it is possible to be arbitrary material, but such as can enumerate thermoplastic resin, heat-curing resin, light-cured resin. In addition, as adhesive layer 70, can also be formed with the two sides of the base materials such as polyethylene terephthalate (PET), non-woven fabrics Adhesive layer.Here, as the glass transition point Tg of adhesive layer 70, preferably more than 85 DEG C.By making glass transition point Tg More than 85 DEG C, so that in the in-car environment of high temperature like that of the automobile under hot sunlight, it is also difficult to flow, because This can suppress the error detection taken one's seat as caused by the flowing of adhesive layer 70.

Pedestal 2 has：The mounting portion 21 loaded for load detection sensor 5；And a pair linked with the mounting portion 21 Hook portion 22.The face of the upside of mounting portion 21 is mounting surface 21S.Main piece of 50m is configured with mounting surface 21S.As shown in Fig. 2 For main piece of 50m, the face opposed with the mounting surface 21S of mounting portion 21 that is, pedestal opposed faces 50mps it is overall not with mounting Portion 21 is bonded, and mounting surface 21S is abutted with pedestal opposed faces 50mps.In addition, in mounting portion 21, being formed with from mounting surface 21S insertions are gone back to multiple through hole 20H (Fig. 1) in the face (face of the side opposite with mounting surface 21S) of the downside of mounting portion 21 It is formed with multiple hook openings 24 (Fig. 1).

A pair of hook portions 22 are respectively arranged at across mounting portion 21 and mutually opposing position, and are respectively embedded into vehicle The opening of framework in seat unit opens a pair of S-shaped springs 100 of the adjoining in the multiple S-shaped springs 100 (Fig. 2) set side by side. Therefore, each hook portion 22 is the fastener that pedestal 2 is locked to S-shaped spring 100.In the present embodiment, a pair of shapes of hook portion 22 As along the transversely arranged of seat unit, and it is embedded in adjacent a pair of S-shaped springs 100 in the transverse direction.In addition, in a pair of hooks Portion 22 is so embedded in the state of a pair of adjacent S-shaped springs 100, and mounting portion 21 is located to be uploaded in multiple S-shaped springs 100 The seat cushion SC (Fig. 2) put lower section, and in the case of multiple S-shaped springs viewed from above, mounting portion 21 configure this one To between S-shaped spring 100.In the state of a pair of hook portions 22 are embedded in a pair of S-shaped springs 100 as described above, in this implementation In mode, positions of the mounting surface 21S positioned at the bottom than each S-shaped spring 100 on the lower.In addition, in present embodiment In the case of, metallic plate is formed to obtain pedestal 2, thickness of slab in this case is, for example, 0.8mm.

Pressing component 4 is to cover the main piece of 50m for the mounting surface 21s for being placed in mounting portion 21 to protect the 1st of main piece of 50m The part such as electrode 56e and the 2nd electrode 57e.In addition, as shown in Fig. 2 pressing component 4 is also to be pressed by seat cushion SC so as to carrying The pressing component that the switch SW being made up of the 1st electrode 56e and the 2nd electrode 57e of lotus detection sensor 5 is pressed.

The pressing component 4 has roof 45 and frame wall 48.Roof 45 is the part of generally round tabular.In addition, The frame wall 48 of pressing component 4 is divided into multiple, and is connected with the periphery shape of roof 45.It is being divided into each multiple frame walls Between 48, hook tabs 47 is connected with roof 45.Each hook tabs 47 is formed as being embedded in the hook use in the formation of mounting portion 21 of pedestal 2 The structure of opening 24.By making each hook tabs 47 be embedded in hook opening 24, so as to limit the mounting of pedestal 2 and pressing component 4 Relative movement on the 21S directions of face.

Fig. 3 is the figure that pressing component 4 is represented with the viewpoint different from Fig. 1.As shown in figure 3, in the roof of pressing component 4 45, it is provided with the press section 46 from the bottom surface protrusion opposed with the mounting portion 21 of pedestal 2.In this case, press The front end of splenium 46 is formed as flat shape, and the plane is generally circular.The press section 46 be formed as than the 1st electrode 56e and Area small 2nd electrode 57e.That is, in the case of the upper surface 45S of front observation pressing component 4, the 1st electrode 56e and the Positions of the 2 electrode 57e positioned at the scope than the surrounded by edges by the upper surface in the inner part.In addition, observing pressing component 4 in front Upper surface 45S in the case of, press section 46 be located at the side orthogonal with the 1st electrode 56e and the 2nd electrode 57e thickness direction The scope position in the inner part that upward ratio is surrounded by the side of electrode.

In addition, in the roof 45 of pressing component 4, being provided with from the side identical bottom surface set by press section 46 and protruding Multiple ribs 49, above-mentioned rib 49 is formed at the overlapping positions of multiple through hole 20H with the formation of mounting portion 21 in pedestal 2. Pressing component 4 covers the load detection sensor 5 for the mounting portion 21 for being placed in pedestal 2 and each hook tabs 47 is embedded in each hook In the state of opening 24, each rib 49 is inserted in corresponding through hole 20H.Thus, even if the sheet material table of load detection sensor 5 Face is not integrally bonded in mounting portion 21, limits the load detection sensor 5 with the press section 46 of pressing component 4 in mounting surface yet Relative movement on 21S directions.In addition, pressing component 4 cover be placed in mounting portion 21 load detection sensor 5 and Each hook opening 24 is embedded with the state of corresponding hook tabs 47, and the front end of press section 46 is contacted with load detection sensor 5.

In addition, pressing component 4 is formed by the material than seat cushion SC hard.Therefore, pressed as a part for pressing component 4 Splenium 46 is also formed by the material than seat cushion SC hard.Usually, seat cushion SC is made up of the polyurethane resin foamed, because This can enumerate makrolon (PC), polyamide (PA), PBT, phenolic resin, epoxy resin as the material of this pressing component 4 Deng resin.

In the state of this load detection sensor unit 1A is installed on a pair of S-shaped springs 100, the top of pressing component 4 The upper surface 45S and seat cushion SC of wall 45 lower surface across predetermined distance it is opposed.Upper surface 45S is in plane.Upper surface 45S is subject to the compression face of the pressing from seat cushion SC, and upper surface 45S area is formed as than in press section 46 and load The area for the part that the metallic plate 60 of detection sensor 5 is contacted is big.

Next, load detection sensor 5 is described in more details.

Fig. 4 is the exploded view of load detection sensor 5.As shown in figure 4, sensor chip 50 possesses the 1st electrode slice 56, interval The electrode slice 57 of part 58 and the 2nd.There is 1st electrode slice 56 the 1st insulating trip 56s, the 1st electrode 56e and the 1st terminal 56c to make For main structure.

1st insulating trip 56s is with flexible resinous insulating trip.1st insulating trip 56s by with sensor chip 50 Main piece of 56m of main piece of 50m same shape and be connected with main piece of 56m and with the tail block 50t same general shapes of sensor chip 50 Tail block 56t constitute.For tail block 56t shape, be formed as comparing tail at the front end position of the side opposite with main piece of 56m It is on this point of the narrow width in block 56t other positions, different from the tail block 50t of sensor chip 50 shape.In addition, at main piece 56m and in the through hole 50H identicals position with sensor chip 50, is formed with through hole 56H.It is used as this 1st insulating trip 56s Material, the resins such as PET, polyimides (PI) or PEN (PEN) can be enumerated.In addition, the 1st insulating trip Turn into the master of sensor chip 50 as described above with the face of the opposite side for the side that distance piece 58 is opposed in 56s main piece of 56m Block 50m pedestal opposed faces 50mps (Fig. 2).

1st electrode 56e is arranged on the face of a side of main piece 56 of substantially centre.1st electrode 56e is by conductor layer structure Into it is, for example, approximate circle metal printing brush layer.1st terminal 56c is made up of conductor layer, and it is, for example, the gold of approximate quadrangle Belong to layer.1st terminal 56c is arranged at being provided with the face of the 1st electrode 56e side in tail block 56t above-mentioned front end position.Separately Outside, the 1st electrode 56e and the 1st terminal 56c is electrically connected to each other via the 1st wiring 56w.

There is 2nd electrode slice 57 the 2nd insulating trip 57s, the 2nd electrode 57e and the 2nd terminal 57c to be used as main structure.

2nd insulating trip 57s is configured at the position (Fig. 2) than the seat pad SC sides of the 1st electrode slice 56, itself and the 1st insulating trip 56s Equally it is resinous insulating trip.In this case, the 2nd insulating trip 57s is by main piece with the 1st insulating trip 56s Main piece of 57m of 56m identical shapes and it is connected with main piece of 57m and being shaped so as to and the 1st insulating trip beyond the position of front end The tail block 57t of 56s tail block 56t identical shapes is constituted.Tail block 57t front end position is formed as other portions than tail block 57t The narrow width in position, when making the 1st insulating trip 56s overlapping with the 2nd insulating trip 57s, does not make before the 1st insulating trip 56s tail block 56t End position and the 2nd insulating trip 57s tail block 57t front end position are overlapped.In addition, in main piece of 57m, with the 1st insulating trip 56s Similarly through hole 57H is formed with the through hole 50H identicals position with sensor chip 50.It is used as the 2nd insulating trip 57s material Material, ground identical with the 1st insulating trip 56s can enumerate the resins such as PET, PI or PEN, and the 2nd insulating trip 57s material can be with the 1st Insulating trip 56s material is identical, can also be different.

2nd electrode 57e is the electrode paired with the 1st electrode 56e, and it is formed as and the 1st electrode 56e identical structures.Should 2nd electrode 57e is arranged on the face of a side of the 2nd insulating trip 57s main piece of 57m substantially centre.In addition, the 2nd electrode 57e Set position turns into the position overlapping with the 1st electrode 56e when making the 1st electrode slice 56 overlapping with the 2nd electrode slice 57.2nd Terminal 57c be formed as with the 1st terminal 56c identical structures, it is arranged in tail block 57t above-mentioned front end position and is provided with On the face of 2 electrode 57e side.In addition, as described above, when making the 1st insulating trip 56s overlapping with the 2nd insulating trip 57s, respectively The front end position of individual insulating trip is not overlapped, thus the 1st terminal 56c and the 2nd terminal 57c be located at the 1st insulating trip 56s with Expose between 2nd insulating trip 57s.In addition, the 2nd electrode 57e and the 2nd terminal 57c is electrically connected to each other via the 2nd wiring 57w.

Distance piece 58 is configured between the 1st electrode slice 56 and the 2nd electrode slice 57, and it is resinous exhausted with flexibility Embolium.The tail block 58t that the distance piece 58 is connected by main piece of 58m and with main piece of 58m is constituted.Main piece of 58m profile and the 1st exhausted Embolium 56s, the 2nd insulating trip 57s main piece of 56m, 57m profile it is identical.In addition, being formed with opening in main piece of 58ta center 58c, in addition, identically with the 1st insulating trip 56s, the 2nd insulating trip 57s in the through hole 50H identicals position with sensor chip 50 It is formed with through hole 58H.Tail block 58t is formed as the width in the 1st insulating trip 56s, the 2nd insulating trip 57s tail block 56t, 57t Shape obtained by narrower front end position removing.

The 58c that is open is in approximate circle shape, and it is formed as diameter of the diameter than the 1st electrode 56e and the 2nd electrode 57e It is slightly smaller.In this case, the area of the plane preferably on the front end of press section 46 is in 3.0mm²More than.In addition, The profile of plane on the front end of press section 46 is in approximate circle shape, as the diameter D2 of the plane, preferably 2.0mm with On.Additionally, it is preferred that area of the area of the plane on the front end of press section 46 relative to opening 58c is below 0.8 times.In addition, In the case that the profile of plane on the front end of opening 58c and press section 46 is all in approximate circle, preferably before press section 46 Diameter D1s of the diameter D2 of plane on end relative to opening 58c is below 0.8 times.

Such opening 58c is formed as, and making, distance piece 58 and the 1st electrode slice 56 and the 2nd electrode slice 57 are overlapping and bow In the case of observation distance piece 58, opening 58c is located at the inner side of the 1st electrode 56e and the 2nd electrode 57e peripheries.Also, Distance piece 58 is formed with the slit 58b for being connected in the space in opening 58c with the space of the outside of sensor chip 50.The slit 58b is when making the 1st electrode slice 56, the electrode slice 57 of distance piece 58 and the 2nd distinguish overlapping, as passage.In addition, between making Spacing body 58 and the 1st electrode slice 56 and the 2nd electrode slice 57 is overlapping and top view distance piece 58 in the case of, can also be formed as The 58c that is open is located at the outside of the 1st electrode 56e and the 2nd electrode 57e peripheries.

It is identical with the 1st insulating trip 56s and the 2nd insulating trip 57s as the material of distance piece 58, can enumerate PET, PI or The resins such as person PEN.In addition, the material of distance piece 58 can be identical with the 1st insulating trip 56s or the 2nd insulating trip 57s material, Can also be different.In addition, distance piece 58 coated on both sides have for the 1st electrode slice 56 and the 2nd electrode slice 57 bonding Adhesive (not shown).

In the state of above-mentioned 1st electrode slice 56, the electrode slice 57 of distance piece 58 and the 2nd are pasted successively, the 1st electrode It is exhausted that the wirings of wiring 56w and the 2nd electrode 57e of the 2nd electrode slice 57 and the 2nd of 1st electrode 56e of piece 56 and the 1st 57w is located at the 1st Between embolium 56s and the 2nd insulating trip 57s.Moreover, the 1st electrode 56e is opposed so as to constitute via opening 58c with the 2nd electrode 57e Switch SW.In addition, in the state of the 1st electrode slice 56, the electrode slice 57 of distance piece 58 and the 2nd are overlapping, each through hole 56H, 57H, 58H are overlapped, so that the through hole 50H as sensor chip 50.

In addition, in the 1st terminal 56c of sensor chip 50 and the 2nd terminal 57c, being connected to and control (not shown) The signal cable 19 of device connection.1st terminal 56c and the 2nd terminal 57c passes through conductive paste, weldering with each signal cable 19 Connect etc. and connect.As shown in figure 1, the sensing including being connected with the 1st terminal 56c and the 2nd terminal 57c of signal cable 19 The tail block 50t of device piece 50 end is covered by terminal sealing resin 18.The terminal sealing resin 18 is for example by PUR, photocuring Resin etc. is constituted.So, suppress each signal cable 19 respectively from the 1st terminal 56c and the 2nd terminal 57c to depart from, and suppress 1st terminal 56c and the 2nd terminal 57c are short-circuit because of dust of electric conductivity etc..

Metallic plate 60 is made up of the flexible sheet metal with the degree for being difficult to bend than sensor chip 50.It is used as metal The material of plate 60, as long as conductive metal, just there is no particular limitation, but such as can enumerate copper, stainless steel. In the case of present embodiment, metallic plate 60 is formed as the shape being substantially the same with main piece of 50m of sensor chip 50.

Through hole 60H is formed with the metallic plate 60 and in the through hole 50H identicals position with sensor chip 50, is made When sensor chip 50 is overlapping with metallic plate 60, the through hole 50H of sensor chip 50 and the through hole 60H phase mutual respects of metallic plate 60 It is folded.In addition, when making sensor chip 50 overlapping with metallic plate 60, metallic plate 60 covers sensor chip 50 via adhesive layer 70 The switch SW being made up of the 1st electrode 56e and the 2nd electrode 57e, so as to be pasted on seat cushion side 50mcs.

As shown in Fig. 2 the load detection sensor 5 with said structure is configured in the mounting portion 21 of pedestal 2.It is specific and Speech, main piece of 50m of the sensor chip 50 with the 1st electrode 56e and the 2nd electrode 57e is located in the mounting portion 21 of pedestal 2.And And, tail block 50t, terminal sealing resin 18 and a pair of the signal cables 19 of sensor chip 50 are exported from pedestal 2.

In addition, as described above, the load detection sensor 5 and each hook for being placed in pedestal 2 are covered in pressing component 4 Piece 47 is embedded in the state of each hook opening 24, and the front end of press section 46 is contacted with the metallic plate of load detection sensor 5 The position overlapping with the 1st electrode 56e and the 2nd electrode 57e in 60.In addition, in this condition, each rib 49 passes through corresponding gold Belong to through hole 60H, the through hole 50H of sensor chip 50 of plate 60 and the through hole 20H of pedestal 2.Therefore, even in pedestal 2 With under the 1st insulating trip 56s unbonded states, also limiting the load detection sensor 5 and the phase of the press section 46 of pressing component 4 To movement.That is, rib 49 can be interpreted as to phase of the limiting sensor piece 50 with pedestal 2 in pedestal opposed faces 50mps direction To mobile movement restricting member.

Next, the detection taken one's seat to the load detection sensor unit 1A execution by present embodiment is illustrated.

Fig. 5 is the figure for the on-state for representing load detection sensor 5.If people is seated at seat unit, seat cushion SC's Following table is moved downwards, and seat cushion SC lower surface contacts with the upper surface 45S of pressing component 4 and upper surface 45S is entered Row pressing.Then, if seat cushion SC lower surface is further moved downwards, as shown in figure 5, the front end of press section 46 is to metal Plate 60 is pressed, and because of the flexure of metallic plate 60 the 2nd insulating trip 57s main piece of 57m is also bent.Now, because the 1st is exhausted Embolium 56s main piece of 56m pedestal opposed faces 50mps is not bonded with pedestal 2, so at least the 1st electrode 56e and the 2nd electrode 57e peripheral part in the way of the flexure mode for following metallic plate 60 to be deformed.As a result, the 2nd electrode 57e and the 1st Electrode 56e is contacted, and load detection sensor 5 is connected, and thus detects load.Then, it is connected not using with signal cable 19 The vehicle of diagram is detected with control unit takes one's seat.

As described above, the resinous sensor chip 50 of the load detection sensor unit 1A in present embodiment, is set There is the switch SW being made up of a pair of electrodes 56e, 57e being separated from each other.It is used as the seat cushion side in the face of a side of the sensor chip 50 Face 50mcs is fitted with metallic plate 60 by adhesive layer 70, and is configured between the seat cushion SC and metallic plate 60 of seat unit Press section 46.

In the case where metallic plate 60 is pressed by the press section 46, the metallic plate 60 bends and presses resinous sensor Piece 50, then the sensor chip 50 bend and so that be separated from each other a pair of electrodes 56e, 57e contact so that load detection sensing Device 5 is connected, and then detects load.

Press section 46 is than seat cushion hard, because metallic plate 60 is pressed by the press section 46, thus with the directly quilt of metallic plate 60 The situation of seat cushion SC pressings is compared, and metallic plate 60 can be made suitably to bend, can suitably detect and take one's seat.

In addition, metal be difficult to compared with resin produce creep, even if therefore pressed portion 46 press, it is also difficult in metallic plate 60 leave impression.Therefore, in load detection sensor unit 1A, the error detection taken one's seat as caused by impression can be suppressed, Taken one's seat as a result, can suitably detect.

However, with metal phase ratio, in resin flexibility easily changed according to the change of environment temperature, therefore exist easily Produce creep and also easily leave the trend of impression.But, in load detection sensor unit 1A, due to metallic plate 60 with The surface side of one side of resinous sensor chip 50 is fitted by adhesive layer 70, so in the pressing quilt carried out by press section 46 When releasing, metallic plate 60 are back to position when not pressing, metallic plate 60 can make resinous sensor chip 50 be back to this Position.Therefore, in load detection sensor unit 1A, the environment around load detection sensor unit 1A In the case that temperature produces change, it is also difficult to leave impression in resinous sensor chip 50, can suppress to be caused by the impression The error detection taken one's seat.Taken one's seat as a result, can suitably detect.

In addition, in the load detection sensor unit 1A of present embodiment, sensor chip 50 of the configuration on pedestal 2 The main piece of 50m pedestal opposed faces 50mps opposed with pedestal 2 is not integrally bonded in pedestal 2.Pedestal in main piece of 50m is opposed In the 50mps of face, the peripheral part at least region overlapping with the 1st electrode 56e and the 2nd electrode 57e is easy in the way of floating Deformation.Therefore, at least the 1st electrode 56e and the 2nd electrode 57e peripheral part that is, peripheral part is easily to follow metallic plate The mode of 60 flexure mode is deformed (Fig. 4), is taken one's seat as a result, can suitably detect.

So, in the load detection sensor unit 1A of present embodiment, pressing when easily make sensor chip 50 with The mode for following metallic plate 60 is deformed, and on the other hand easily sensor chip 50 is back to original by metallic plate 60 when not pressing Come shape and deform.

In addition, in the load detection sensor unit 1A of present embodiment, setting restricted pedestal opposed faces 50mps's Main piece of 50m and the rib 49 of the relative movement of pedestal 2 on direction.

Therefore, even if the overall non-adhering of main piece of 50m being configured on pedestal 2, also suppresses main piece of 50m relative to pedestal 2 Skew, so as to suppress skews of the main piece of 50m relative to the pedestal 2.Even if therefore, it is possible to suppress from press section 46 by by The undesirable condition that pressure, load detection sensor 5 are also disconnected.

In addition, in the load detection sensor unit 1A of present embodiment, because rib 49 will be formed in sensor chip 50 Through hole 50H and be formed at pedestal 2 through hole 20H insert, so easily suppress sensor chip 50 relative to pedestal 2 Skew.

In addition, in the load detection sensor unit 1A of present embodiment, rib 49 is a part for pressing component 4.

Therefore, the position relationship of press section 46 and the 1st electrode 56e and the 2nd electrode 57e in pressing component 4 is suppressed Skew, so as to suppress even if from the undesirable condition that the press section 46 is depressed, load detection sensor 5 is also disconnected. Further, since a part for the pressing component 4 is formed as rib 49, without setting movement in addition in addition to pressing component 4 Limiting part, even if the overall non-adhering of main piece 50m of the configuration on pedestal 2, can also suppress main piece of 50m relative to pedestal 2 Skew.Therefore, in the case where load detection sensor unit 1A has pressing component 4 as in the present embodiment, Neng Goujian Change load detection sensor unit 1A structure.

In addition, in the load detection sensor unit 1A of present embodiment, pressing component 4 has roof 45, the roof 45 are formed as the area bigger than the area that press section 46 is contacted with metallic plate 60 and bear the pressing from seat cushion SC.

Because the area of the press section 46 by the area of the seat cushion SC roofs 45 pressed than being contacted with metallic plate 60 is big, so Using the roof 45 pressing force from seat cushion SC can be made to concentrate on press section 46, can more suitably make metallic plate 60 curved It is bent.Therefore, according to the pressing component 4, the 1st electrode 56e and the 2nd electrode 57e of sensor chip 50 etc. can not only be protected, also It can more suitably detect and take one's seat.

In addition, in the load detection sensor unit 1A of present embodiment, the area of roof 45 is pressed than pressed portion 46 The 1st electrode 56e and the 2nd electrode 57e of pressure area are big.Therefore, seat cushion SC can be from the surface of a pair of electrodes 56e, 57e Power is transmitted towards roof 45 in direction in addition.Therefore, it is possible to more suitably make pressing force concentrate on press section 46, can more it fit Locality bends metallic plate 60.As a result, being taken one's seat therefore, it is possible to more suitably detection.

In addition, in the load detection sensor unit 1A of present embodiment, press section 46 is formed as than the 1st electrode 56e And the 2nd small area of electrode 57e.Therefore, it is possible to make the pressing that press section 46 is concentrated on by the roof 45 of pressing component 4 Power is not transmitted dispersedly to the 1st electrode 56e and the 2nd electrode 57e.

In addition, in the load detection sensor unit 1A of present embodiment, the front end of press section 46 is formed as planar shaped Shape.In the case of being flat shape in the front end of the press section 46, be formed as the situation phase of the curve form of convex with the front end Than the pressing force that load detection sensor 5 is subject to from press section 46 is disperseed, therefore the adhesive layer 70 of load detection sensor 5 is difficult Kept out of the way with the pressing because of press section 46 to side.Accordingly, it is difficult to impression be left in adhesive layer 70, as a result, can also subtract The situation that the ground of adhesive layer 70 leaves impression in metallic plate 60 is followed less.

Here, the press section 46 using front end for the present embodiment of flat shape is carried out to load detection sensor 5 Experimental result in the case of pressing is shown in Fig. 6.In addition, before being used as shown in Figure 7 instead of the ground of press section 46 of present embodiment Hold the press section 146 of the curve form for convex, and load detection sensor 5 will be pressed using the press section 146 In the case of experimental result be shown in Fig. 8.Experimental method is, load detection sensor 5 is applied 1 second in the environment of 25 DEG C Provide after plus load, when being determined again to the imposed load of load detection sensor 5 at the time of a pair of electrodes 56e, 57e is contacted Load (connection load).Plus load is set to increase 10N every time from no load state (connection), and with each plus load accordingly Determine and connect load.In addition, the measure number of times for connecting load is 3 times.As shown in Fig. 6 and Fig. 8, end is planar shaped before application In the case of the press section 46 of shape, compared with situation of the application front end for the press section 146 of the curve form of convex, load is connected Difference it is smaller, it is to be understood that to be difficult to leave impression in adhesive layer 70, the metallic plate 60 of load detection sensor 5.

However, being sat as the male (male of the relatively low male to 95% from the statistics of the body weight of male) of heavier-weight Body weight when, is about 20N to the load detection sensor unit 1A load applied.Moreover, the load in about 20N puts on load During lotus detection sensor unit 1A, apply excessive power from press section 46 towards metallic plate 60, the pressed portion that there is metallic plate 60 The part of 46 pressings produces the situation of plastic deformation, in this case, connects load reduction, it is impossible to suitably detect load.

In this case, the area of the plane on the front end of press section 46 is 3.0mm²More than.In addition, pressing The profile of plane on the front end of splenium 46 is approximate circle shape, and the diameter D2 of the plane is more than 2.0mm.In the situation Under, it can either more suppress the part generation plastic deformation that the pressed portion 46 of metallic plate 60 is pressed, pressing force can be prevented again The undesirable condition for excessively disperseing and causing load detection sensor 5 to be not turned on.

Also, in this case, the area of the plane on the front end of press section 46 is relative to opening 58c's Area is below 0.8 times.In addition, diameter D1s of the diameter D2 of the plane on the front end of press section 46 relative to opening 58c is 0.8 Below times.In this case, press section 46 can be suppressed excessive and make the scattered situation of pressing force, so as to suppress load inspection Survey the undesirable condition that sensor 5 is not turned on.

(2) the 2nd embodiments

Next, being illustrated to the 2nd embodiment of the present utility model.In addition, being illustrated to present embodiment When, for the inscape identical or equal with the 1st embodiment, mark identical reference numbers, and omit except The explanation of repetition outside the situation of special instruction.

In the 1st embodiment, for configuring the main piece of 50m on pedestal 2, the mounting surface 21S with mounting portion 21 The pedestal opposed faces 50mps of main piece of opposed 50m is not bonded integrally with mounting portion 21.On the other hand, in the present embodiment, it is main A block 50m pedestal opposed faces 50mps part is bonded in mounting portion 21.

Fig. 9 is to represent the load detection sensor unit 1B of the 2nd embodiment figure, Figure 10 with Fig. 2 identical viewpoints It is the part for representing the 1st insulating trip 56s from the pedestal opposed faces 50mps side front opposed with the mounting surface 21S of pedestal 2 Appearance figure.In addition, specifically main piece 56m of a 1st insulating trip 56s part.

As shown in Fig. 9 and Figure 10, in the load detection sensor unit 1B of present embodiment, main piece of 50m pedestal In opposed faces 50mps on the thickness direction of sensor chip 50 with the 1st electrode 56e of the sensor chip 50 and the 2nd electrode Region AR (Figure 10) overlapping 57e is bonded by adhesive A D (Fig. 9).In addition, the pedestal opposed faces 50mps beyond the AR of the region is whole Body is not bonded.In addition, in the sensor chip from the pedestal opposed faces 50mps side front opposed with the mounting surface 21S of pedestal 2 In the case of 50, adhesive A D is located at the position of edge in the inner part than the main piece of 50m for being configured at pedestal 2 in the sensor chip 50 Put.In addition, making the 1st electrode contemplating along the 1st electrode 56e and the 2nd electrode 57e of sensor chip 50 thickness direction It is substantially uniform with adhesive A D (Fig. 9) in pedestal opposed faces 50mps in the case of 56e and the 2nd electrode 57e movements.

So, in the case where the region AR overlapping with the 1st electrode 56e and the 2nd electrode 57e is by bonding, main piece is suppressed Skews of the 50m relative to pedestal 2.Therefore, even if eliminating rib 49, the skew relative to pedestal 2 by main piece of 50m can also be suppressed Caused main piece of 50m and the skew of the relative position of metallic plate 60.Even if therefore, it is possible to suppress metallic plate 60 from press section 46 by The undesirable condition also disconnected to pressing, load detection sensor 5.On the other hand, with the 1st electrode 56e and the 2nd electrode 57e Pedestal opposed faces 50mps beyond overlapping region AR is not bonded integrally.Therefore, it is configured at as described above on pedestal 2 Main piece of 50m is overall easily to be deformed in the way of the flexure mode for following metallic plate 60, can suppress to be difficult to deform by the main piece of 50m The caused error detection taken one's seat.

(3) variation

More than, load detection sensor unit of the present utility model is illustrated by taking above-mentioned embodiment as an example, but The utility model is not limited to above-mentioned embodiment.

For example, in the above-described embodiment, in main piece of 50m of the part as sensor chip 50 seat cushion side 50mcs is pasted with metallic plate 60.However, it is possible in the face of a side of seat cushion SC sides in sensor chip 50 including main piece 50m and a part of tail block 50t position is pasted with metallic plate 60, can also integrally be pasted with metallic plate 60 in the face of a side. In a word, if in the face of a side of seat cushion SC sides in sensor chip 50, observe the face in front in the case of at least with 1st electrode 56e and the overlapping positions of the 2nd electrode 57e are pasted with metallic plate.

In addition, in the above-described embodiment, including the 1st electrode 56e and the 2nd electrode 57e, than the 1st electrode 56e And the 2nd the wide main piece of 50m of electrode 57e configure on pedestal 2.However, it is possible to main piece of 50m and tail block 50t part configuration On pedestal 2, can also sensor chip 50 be integrally provided on pedestal 2.In addition, in the above-described embodiment, pedestal is to be used for Sensor chip 50 is configured into the pedestal 2 between a pair of S-shaped springs 100, but is not limited to the pedestal 2.As long as can be at least Configure the 1st electrode 56e and the 2nd electrode 57e parts, then such as also can by seat plate, a part for car body various portions Part is used as pedestal.

In addition, in the above-described embodiment, in the 1st embodiment, for configuring the main piece of 50m on pedestal 2, The main piece 50m opposed with the mounting surface 21S of mounting portion 21 pedestal opposed faces 50mps is not bonded integrally with mounting portion 21.It is another Aspect, it is heavy with the 1st electrode 56e and the 2nd electrode 57e in main piece of 50m pedestal opposed faces 50mps in the 2nd embodiment Folded region AR is bonded, and the pedestal opposed faces 50mps beyond the AR of the region is not bonded integrally.However, example is such as disposed in platform Main piece of 50m on seat 2 can also integrally be bonded with pedestal 2.In addition, in the 1st electrode 56e and the 2nd electrode 57e peripheral part Easily in the case of being deformed in the way of the flexure mode for following metallic plate 60, preferably at least with the electricity of the 1st electrode 56e and the 2nd The peripheral part in region overlapping pole 57e that is, peripheral part is not bonded with pedestal 2.

In addition, in the above-described embodiment, using rib 49 come on the face direction of limiting sensor piece 50 and metallic plate 60 Relative movement.But, rib 49 it is not necessary to.In this case, for example, can make as described above in main piece of 50m with 1st electrode 56e and the overlapping region AR of the 2nd electrode 57e are bonded.

In addition, in the above-described embodiment, press section 46 and the roof 45 of pressing component 4 are integrally formed.However, pressing Portion 46 can also be formed as split with roof 45, and be installed on the roof 45 etc..

In addition, in the above-described embodiment, the planar shape in front end of press section 46.However, the front end of press section 46 It can be in the curve form of the convex shown in Fig. 7.In the case of the convex curve form in the front end of press section 46, and before it Hold the situation of planar shape to compare, can concentrate the pressing force applied from press section 46 towards load detection sensor 5.Cause This, waited in the case that the metallic plate 60 of load detection sensor 5 is thicker, the pressing force that is subject to from press section 46 be difficult to In the state of load detection sensor 5 is transmitted, load also can be suitably detected.

In addition, especially effective during the action of the effect at low ambient temperatures.It is known at low ambient temperatures, adhesive layer 70 consolidate Change, and modulus of elasticity is significantly improved, the nothing particularly in the case where temperature is in below the glass transition point of adhesive layer 70 Method ignores the influence of the modulus of elasticity of adhesive layer 70.Because the modulus of elasticity of adhesive layer 70 produces large change because of temperature, institute With the stabilization of the connection load for sensor, preferably the influence of the modulus of elasticity of adhesive layer 70 is below 10%.For example, low Under warm environment, adhesive layer 70 modulus of elasticity rise to the 2nd insulating trip 57s modulus of elasticity 20% or so in the case of, It is required that making the thickness of adhesive layer 70 at less than 0.8 times of the 2nd insulating trip 57s.That is, for making front end be formed as the curved of convex For the effect of shape, in the case where temperature is in below the glass transition point of adhesive layer 70, king-sized effect can be expected Really, the thickness of adhesive layer 70 and is preferably made at less than 0.8 times of the 2nd insulating trip 57s.In addition, being in the front end of press section 46 In the case of flat shape, compared with situation of the front end for the curve form of convex, effect is smaller, but by making adhesive layer 70 thickness is at less than 0.8 times of the 2nd insulating trip 57s, so as to make the connection stable load of sensor.

On the other hand, preferably adhesive layer 70 is more than 10 μm.The mobility increase of adhesive layer 70 in high temperature environments, at this Under state, if applying excessive pressing force, can the adhesive layer 70 of pair position overlapping with press section 46 apply excessive pressing Power and it is flowed to side so that it is thinning and make connection load reduction or cohesive with certain thickness to there is adhesive layer 70 The possibility for being damaged and making electrode contact all the time, still, by making adhesive layer 70 more than 10 μm, so as to prevent load to examine The connection load reduction of sensor 5, cohesive is surveyed to be damaged.In addition, in the case of being flat shape in the front end of press section 46, with The front end is compared for the situation of the curve form of convex, and effect is smaller, but by making adhesive layer 70 more than 10 μm, so as to The connection load reduction of load detection sensor 5, cohesive is prevented to be damaged.

In addition, in the above-described embodiment, opening is not provided with the roof 45 of pressing component 4.However, such as Figure 11 institutes Show, opening 45OP can also be provided with the roof 45 of pressing component 4.By setting such opening 45OP, so that correspondingly Easily bend roof 45, by deforming roof 45, so that press section 46 is pressed on into metallic plate 60.Therefore, it is possible to utilize The pressing force being subject to by the upper surface 45S of pressing component 4 is further easily transmitted in press section 46, even and if by press section The part beyond roof 45 in part 4 is fixed, and can also connect suitably load detection sensor 5.In addition, the Figure 11's In example, the opening 45OP from the front of upper surface 45S sides in the case of pressing component 4 is shaped as trapezoidal shape, 6 openings 45OP becomes wider further away from the central portion of roof 45, and is arranged radially from the central portion, but opening 45OP Shape, quantity, set-up mode are not limited to the example of the Figure 11.

In addition, in the above-described embodiment, do not apply external pressure detect take one's seat when beyond in the state of, press section 46 Abutted with metallic plate 60.However, do not apply external pressure detect take one's seat when beyond in the state of, press section 46 can also be with gold Category plate 60 is separated.In addition, although press section 46 and metallic plate 60 are arranged between seat cushion SC and sensor chip, but it is also possible to made The face of the side opposite with seat cushion SC in sensor chip 50 and metallic plate 60 are fitted, and the metallic plate 60 and sensor chip 50 opposite sides (side opposite with seat cushion SC) set press section 46.In this case, as long as can be by sensor chip 50 Fixed with seat cushion SC, then can also be not provided with pedestal 2.

In addition, in the above-described embodiment, do not apply external pressure, detect take one's seat when beyond in the state of, press section The roof 45 of part 4 is separated with seat cushion SC.However, do not apply external pressure, detect take one's seat when beyond in the state of, pressing component 4 roof 45 can also be abutted with seat cushion SC.

In addition, in the above-described embodiment, with switch SW, and by a pair of mutually opposing insulating trip 56s, 57s, match somebody with somebody Put between insulating trip 56s, 57s and the distance piece 58 with opening 58c, being arranged at and 57s pairs of insulating trip in insulating trip 56s The 1st electrode 56e in the face put and with the 1st electrode 56e in pairs and clip opening 58C and separated by a distance with the 1st electrode The 2nd electrode 57e that insulating trip 57s is arranged in the state of 56e is opposed constitutes sensor chip 50.However, the knot of sensor chip 50 Structure is not limited to above-mentioned embodiment.

For example, the 1st electrode 56e or the 2nd electrode 57e in sensor chip 50 can also by the 1st comb-like electrode piece, with And the 2nd pole piece arranged in the way of being engaged across gap with the 1st comb-like electrode piece is constituted.

In addition, for example, it is also possible to existing using by the 1st electrode and the 2nd electrode that are made up of the higher material of the resistance values such as carbon In the state of being contacted with each other via the opening 58c of distance piece 58, it is respectively arranged in a pair of insulating trips 56s, 57s opposed faces Sensor chip.In the sensor chip, if being applied in pressing force, the resistance value of a pair of electrodes declines.What is so changed In the case that resistance value is less than setting as the threshold value by resistance value during ordinance load, detect to receive load.

In addition, for example, it is also possible to making the 1st electricity using in the conductive rubber via the opening 58c for being configured at distance piece 58 Pole 56e contacted with the 2nd electrode 57e in the state of, above-mentioned electrode 56e, 57e are respectively arranged to a pair of insulating trips 56s, 57s Sensor chip in opposed faces.In the sensor chip, if being applied in pressing force, conductive rubber displacement and cause a pair of electrodes Resistance value between 56e, 57e declines.In the resistance value so changed less than resistance value when setting as by ordinance load In the case of threshold value, detect to receive load.

In addition, for example, being provided as on the face opposed with the insulating trip 57s of the opposing party in the insulating trip 56s of a side The 1st comb-like electrode piece and the 2nd pole piece as the 2nd electrode of 1st electrode, and in the insulating trip 57s of the opposing party In the face opposed with the insulating trip 56s of a side on conductive rubber is set.In addition, can also use so that conductive rubber with 1st comb-like electrode piece and the 2nd pole piece are arranged at a pair across opening 58c and opposed mode, by distance piece 58 Sensor chip between insulating trip 56s, 57s.In the sensor chip, if being applied in pressing force, conductive rubber and the 1st broach Shape electrode slice and the 2nd pole piece contact area increase and decline output resistance, and conductive rubber displacement and Decline the resistance value between the 1st comb-like electrode piece and the 2nd comb-like electrode piece.In the resistance value so changed less than setting In the case of as the threshold value by resistance value during ordinance load, detect to receive load.In addition it is also possible to omit the biography The distance piece 58 of sensor piece.

In addition, for example, it is also possible to using the spacer arrangement of the sheet with flexibility by opening 58c is eliminated at a pair It is between insulating trip 56s, 57s and corresponding by being arranged on across the distance piece and the 1st opposed electrode 56e with the 2nd electrode 57e Capacitive sensor chip on insulating trip 56s, 57s face.In the sensor chip, if being applied in pressing force, distance piece Bend and make it that the distance between a pair of electrodes 56e, 57e diminishes, so that the electric capacity increase produced between the electrode 56e, 57e. In the case of threshold value of the electric capacity so changed higher than electric capacity when setting as by ordinance load, detect to receive load Lotus.

For above-mentioned load detection sensor unit 1A, 1B each inscape, except above-mentioned embodiment, variation institute Outside the content shown, can be suitably combined in the range of the application purpose is not departed from, omit, change, known technology It is additional etc..

As long as load detection sensor unit of the present utility model, which is arranged under seat cushion, should detect the place of load, just There is a possibility that to utilize.In the above-described embodiment, load detection sensor unit is configured under the seat cushion of the seat of vehicle, And taking one's seat for people is detected, but the presence or absence of the presence under the mattress such as can also configure in Bed with special provision for nursing and to people is entered Row detection.

Claims (14)

1. a kind of load detection sensor unit, it is configured under seat cushion, and the load detection sensor unit is characterised by,

Possess：

Load detection sensor, the load detection sensor has sensor chip and metallic plate, wherein, the sensor chip has Resinous a pair of insulating trips, be arranged at face mutually opposing in the pair of insulating trip a side the 1st electrode and configuration The 2nd paired electrode between the pair of insulating trip and with the 1st electrode；The metallic plate is arranged at the sensor chip A side face in position at least overlapping with the 1st electrode and the 2nd electrode；

And

Pressing component, the pressing component is configured at the side opposite with sensor chip side of the metallic plate and with to the gold The press section that category plate is pressed,

The press section than the seat cushion hard,

The sensor chip is fitted with the metallic plate by adhesive layer.

2. load detection sensor unit according to claim 1, it is characterised in that

Pedestal is also equipped with, the pedestal configures at least wider than the 1st electrode and the 2nd electrode in the sensor chip Block.

3. load detection sensor unit according to claim 2, it is characterised in that

The sensor chip is formed as：It is in the pedestal opposed faces opposed with the pedestal, at least with the 1st electrode and institute The peripheral part for stating the overlapping region of the 2nd electrode is not bonded in the pedestal, wherein, the pedestal opposed faces are the sensings The face of the opposite side in the face with being pasted with the metallic plate of device piece.

4. load detection sensor unit according to claim 3, it is characterised in that

The whole pedestal opposed faces for configuring the sensor chip on the pedestal are not bonded with the pedestal.

5. load detection sensor unit according to claim 3, it is characterised in that

The sensor chip configured on the pedestal is formed as：The region is bonded with the pedestal, the institute beyond the region Pedestal opposed faces entirety is stated not bond with the pedestal.

6. the load detection sensor unit according to any one of claim 2~5, it is characterised in that

Movement restricting member is also equipped with, the movement restricting member is to the sensor chip and the pedestal in the sensor chip Relative movement on sheet surface direction is limited.

7. load detection sensor unit according to claim 6, it is characterised in that

The movement restricting member is inserted through the through hole in the sensor chip and pedestal formation.

8. load detection sensor unit according to claim 7, it is characterised in that

The movement restricting member turns into a part for the pressing component.

9. according to load detection sensor unit according to any one of claims 1 to 5, it is characterised in that

The pressing component has roof, and the area of the roof is bigger than the area that the press section is contacted with the metallic plate, and Bear the pressing from the seat cushion.

10. load detection sensor unit according to claim 9, it is characterised in that

It is bigger than the area of the 1st electrode and the 2nd electrode that the roof is formed as area,

It is smaller than the area of the 1st electrode and the 2nd electrode that the press section is formed as area.

11. according to load detection sensor unit according to any one of claims 1 to 5, it is characterised in that

The thickness of the adhesive layer is more than 10 μm, and the insulating trip contacted with adhesive layer in the pair of insulating trip Less than 0.8 times of thickness.

12. according to load detection sensor unit according to any one of claims 1 to 5, it is characterised in that

The front end of the press section is formed as the curve form of convex.

13. according to load detection sensor unit according to any one of claims 1 to 5, it is characterised in that

The front end of the press section is formed as flat shape.

14. load detection sensor unit according to claim 13, it is characterised in that

The sensor chip has also between the pair of insulating trip to be provided between opening corresponding with the pair of electrode Spacing body,

The area of the flat shape of the front end of the press section is in 3.0mm²Above and 0.8 times of area of the opening with Under.