WO2017098842A1

WO2017098842A1 - Heater device and heater device production method

Info

Publication number: WO2017098842A1
Application number: PCT/JP2016/082796
Authority: WO
Inventors: 公威石川; 英章加古; 裕康生出; 関　秀樹; 田中　祐介; 近藤　宏司; 多田　和夫; 正晃井ノ口
Original assignee: 株式会社デンソー
Priority date: 2015-12-09
Filing date: 2016-11-04
Publication date: 2017-06-15
Also published as: JPWO2017098842A1; JP6432695B2

Abstract

This heater device comprises: a first sheet member (10) having a sheet-form heating unit (11) generating heat by being electrified, a first insulation layer (12) whereof one surface side is provided with the heating unit, and first electrodes (31, 31a, 31b) each formed on the surface side of the heating unit facing away from the first insulation layer side; and a second sheet member (20) having a second insulation layer (21) disposed to face the one surface of the first insulation layer, and second electrodes (32) formed at positions on the second insulation layer respectively facing the first electrodes formed on the first insulation layer. At least one among the portions in the first sheet member where the first electrodes are formed and the portions in the second sheet member where the second electrodes are formed is configured as dome portions (10a, 20a) yielding dome-shapes protruding toward the surface sides that face away from the surfaces of the first sheet member and the second sheet member which face each other.

Description

Heater device and method for manufacturing heater device

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2015-240494 filed on Dec. 9, 2015, the description of which is incorporated herein by reference.

The present disclosure relates to a heater device that radiates radiant heat by heat of a heat generating portion that generates heat when energized, and a method of manufacturing the heater device.

Conventionally, for example, Patent Document 1 discloses a radiation heater device having an electrode embedded in a substrate portion and a plurality of heat generating portions. In this heater device, the electrode and the heat generating portion are electrically connected inside the substrate, and each is formed in a film shape. In this heater device, since the electrode and the heat generating portion are formed in a film shape, when an object comes into contact with the heat generating portion, the temperature of the heat generating portion is quickly reduced to ensure safety.

JP 2014-189251 A

The apparatus described in Patent Document 1 is such that the temperature of the heat generating part decreases rapidly when the object contacts the heat generating part, but if the object continues to contact the heat generating part, the temperature of the heat generating part Rises gradually, giving the user a thermal discomfort. Therefore, it is conceivable that a switch for detecting an object is provided, and when the object is detected by this switch, the energization amount to the heat generating portion is reduced.

For example, there is a switch described in Japanese Patent Application Laid-Open No. 2006-202732 (hereinafter referred to as Patent Document 2) as a device that detects the contact of such an object. The switch includes an insulating layer as a first sheet, a fixed contact formed on one surface of the first sheet, and an insulating layer as a second sheet facing the one surface of the first sheet. Furthermore, the switch has a flexible movable contact. The flexible movable contact is formed on one surface of the second sheet and opposes the fixed contact through the space so as to be detachable. Further, the switch includes an insulator provided on the flexible movable contact and at a position excluding the pressing portion.

However, when the switch described in Patent Document 2 is brought into close contact with the heater device described in Patent Document 1, the first sheet (that is, the insulating layer) is thermally deteriorated by the heat of the heater device. Then, the first sheet may sag and the first sheet may sag over the second sheet. In this case, although the object is not in contact, it may be erroneously detected that the fixed contact and the movable contact are in contact and the object is in contact.

For this reason, the thickness of the first and second sheets is increased to improve heat resistance, or the spacer for maintaining the distance between the first sheet and the second sheet is increased to increase the fixed contact (that is, the fixed contact). It is necessary to take measures such as increasing the distance between the electrode) and the movable contact (that is, the movable electrode).

However, if the thicknesses of the first and second sheets and spacers are increased, the heat capacities of the first and second sheets and spacers increase, and the amount of heat stored in the first and second sheets and spacers increases when the heater is activated. .

When the amount of heat stored in the first and second sheets and the spacers increases in this way, for example, the heat transfer to the fingers increases at the moment when the finger of the human body touches the heat generating part. The temperature of the part which touched fell rapidly, and the problem that the effect that safety was ensured was impaired was discovered.

This disclosure is intended to provide a heater device that can secure a space between electrodes while suppressing an increase in heat capacity, and to provide a method for manufacturing the heater device.

According to one aspect of the present disclosure, the heater device includes a sheet-like heat generating portion (11) that generates heat by energization, a first insulating layer provided with the heat generating portion on one side, and a first insulating layer of the heat generating portion. A first sheet member having a first electrode formed on a side opposite to the first side, a second insulating layer disposed opposite to one surface of the first insulating layer, and a first electrode of the second insulating layer A second sheet member having a second electrode formed at a position. And at least one of the part in which the 1st electrode in the 1st sheet member was formed, and the part in which the 2nd electrode in the 2nd sheet member was formed is with respect to the surface where the 1st sheet member and the 2nd sheet member oppose It is comprised as a dome part which makes the dome shape which becomes convex toward the opposite surface side.

According to such a configuration, at least one of the portion of the first sheet member where the first electrode is formed and the portion of the second sheet member where the second electrode is formed is the first sheet member and the second sheet member. It is comprised as a dome part which makes the dome shape which becomes convex toward the opposite surface side with respect to the opposing surface. And the force which ensures the space | interval of a 1st electrode and a 2nd electrode arises with such a shape. Therefore, a space between the electrodes can be secured without increasing the heat capacity.

According to another aspect, the method for manufacturing a heater device includes: applying a conductive paste having a larger linear expansion coefficient than the first insulating layer to the first insulating layer; and increasing the linear expansion coefficient than the second insulating layer. Performing at least one of applying a large conductive paste to the second insulating layer, and drying and curing the conductive paste applied to at least one of the first insulating layer and the second insulating layer at a high temperature, A dome part is comprised in at least one of the part in which the 1st electrode in the 1st insulating layer was formed, and the part in which the 2nd electrode in the 2nd insulating layer was formed.

The heater device of the present disclosure can be manufactured by such a manufacturing method.

It is a front view of the heater device concerning a 1st embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. It is the figure which showed arrangement | positioning of the 1st contact electrode and 2nd contact electrode of the heater apparatus which concerns on 1st Embodiment. It is a figure for demonstrating the action | operation of the contact detection part of the heater apparatus which concerns on 1st Embodiment. It is a figure for demonstrating the shaping | molding method of a 2nd contact electrode. It is sectional drawing of the heater apparatus which concerns on 2nd Embodiment. It is sectional drawing of the heater apparatus which concerns on 3rd Embodiment. It is sectional drawing of the heater apparatus which concerns on 4th Embodiment. It is a figure for demonstrating the action | operation of the contact detection part of the heater apparatus which concerns on 4th Embodiment. It is the figure which showed arrangement | positioning of the 1st contact electrode and 2nd contact electrode of the heater apparatus which concerns on 4th Embodiment. It is sectional drawing of the heater apparatus which concerns on 5th Embodiment. It is a front view of the heater device concerning a 6th embodiment. It is a front view of the heater apparatus which concerns on a modification.

Hereinafter, embodiments will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
The configuration of the heater device according to the first embodiment will be described with reference to FIGS. FIG. 1 is a front view of the heater device 1 according to the first embodiment. In FIG. 1, the first insulating layer 12 is omitted. FIG. 2 is a cross-sectional view taken along line II-II in FIG.

The heater device 1 of the present embodiment is installed in a room of a road traveling vehicle. The heater device 1 constitutes a part of a room heating device. The heater device 1 is an electric heater that generates heat by being fed from a power source such as a battery or a generator mounted on a road vehicle. The heater device 1 is formed in a thin sheet shape. The heater device 1 radiates radiant heat mainly in a direction perpendicular to the surface in order to warm an object to be heated positioned in a direction perpendicular to the surface.

The heater device 1 is configured by integrating a first sheet member 10 and a second sheet member 20. The thickness t of the heater device 1 is about 40 to 80 microns.

The first sheet member 10 includes a heat generating portion 11, a first insulating layer 12, and a first contact electrode 31. The heat generating part 11 is formed on one surface side of the first insulating layer 12. The heat generating part 11 generates heat when energized. The first insulating layer 12 is made of a resin material having excellent electrical insulation and withstanding high temperatures. The first insulating layer 12 has a film shape. The first contact electrode 31 is formed on the surface of the heat generating portion 11 opposite to the first insulating layer 12 side.

The second sheet member 20 has a second insulating layer 21 and a second contact electrode 32. The second insulating layer 21 is made of a resin material that has excellent electrical insulation and withstands high temperatures. The second insulating layer 21 has a film shape. The second contact electrode 32 is formed at a position facing the first contact electrode 31 formed on the first insulating layer 12 of the second insulating layer 21. That is, the second contact electrode 32 is formed on the surface of the second insulating layer 21 on the first contact electrode 31 side.

The heat generating part 11 has the same configuration as the heater device described in Patent Document 1 above. That is, the heat generating portion 11 extends along the XY plane defined by the axis X and the axis Y. The heat generating part 11 is formed in a substantially rectangular thin surface. The axes X and Y are orthogonal to each other and are also orthogonal to the axis Z. The axis Z is parallel to the stacking direction of the first sheet member 10 and the second sheet member and is perpendicular to the surface of the heater device 1. The axis X is parallel to the longitudinal direction of the heater device 1 and the heat generating part 11. Further, the axis Y is parallel to the short direction of the heater device 1 and the heat generating unit 11.

The heat generating part 11 has an electrode formed on one surface side of the first insulating layer 12 and a plurality of heat generating elements (none of which are shown). The electrode of the heat generating portion 11 is formed of a material having a low specific resistance, and the heating element is formed of a material having a high specific resistance in order to generate heat so as to generate radiant heat.

The electrode of the heat generating part 11 and the heating element are electrically connected. The plurality of heating elements are arranged in parallel between the electrodes of the pair of heating portions 11. The electrode and the heating element of the heat generating part 11 are formed in a film shape, and the thermal capacity is suppressed. As a result, the temperature of the heating element rises quickly in response to energization. Further, when the object comes into contact, the temperature of the heating element quickly decreases.

The first contact electrode 31 and the second contact electrode 32 constitute a contact detection unit that detects contact of an object with the heat generating unit 11. As shown in FIG. 1, each of the first contact electrode 31 and the second contact electrode 32 has a circular shape. As shown in FIG. 2, the first contact electrode 31 and the second contact electrode 32 are disposed to face each other with the space layer 33 interposed therebetween. The first contact electrode 31 and the second contact electrode 32 are arranged in a region covering almost the entire area of the heat generating portion 11.

The portion where the first contact electrode 31 is formed in the first sheet member 10 is a dome that is convex toward the opposite surface side with respect to the opposing surfaces of the first sheet member 10 and the second sheet member 20. It is configured as a part 10a. This “opposing surface” is a virtual surface sandwiched between the first sheet member 10 and the second sheet member 20. This “opposing surface” may be a flat surface or a curved surface. In another aspect, the portion of the first sheet member 10 where the first contact electrode 31 is formed is configured as a dome portion 10a having a dome shape that is convex toward the opposite side to the second sheet member 20 side. Yes.

Furthermore, the portion of the second sheet member 20 where the second contact electrode 32 is formed also has a dome shape that is convex toward the opposite surface side with respect to the opposing surfaces of the first sheet member 10 and the second sheet member 20. The dome portion 20a is formed. In another aspect, the portion of the second sheet member 20 where the second contact electrode 32 is formed is configured as a dome portion 20a having a dome shape that protrudes toward the side opposite to the first sheet member 10 side. Yes.

The

dome portions

10a and 20a form a dome shape means that the

dome portions

10a and 20a become convex so as to gradually move away from the facing surfaces as they go from the outer edge portions to the

vertexes

10z and 20z. . Outer edge portions of the

dome portions

10a and 20a are located at positions closest to the facing surfaces of the

dome portions

10a and 20a. The outer edge part of the

dome parts

10a and 20a is circular.

Further, the first contact electrode 31 and the second contact electrode 32 are directed toward opposite surfaces with respect to the opposing surfaces of the first contact electrode 31 and the second contact electrode 32 so that the center portions of the electrodes are kept at a distance from each other. Convex shape that is convex.

The first sheet member 10 and the second sheet member 20 are fixed to each other by thermocompression bonding in a region around a portion where the first contact electrode 31 and the second contact electrode 32 arranged to face each other are formed. The region fixed to the second sheet member 20 in this manner in the first sheet member 10 is a fixed portion 10x adjacent to the outer edge portion of the dome portion 10a. The region fixed to the first sheet member 10 in this way in the second sheet member 20 is a fixed portion 20x adjacent to the outer edge portion of the dome portion 20a.

FIG. 3 is a view showing the arrangement of the first contact electrode 31 and the second contact electrode 32. (A) is the figure which showed arrangement | positioning of the 1st contact electrode 31 formed in the heat generating part 11, (b) showed arrangement | positioning of the 2nd contact electrode 32 formed in the 2nd insulating layer 21. FIG.

As shown in FIG. 3A, a plurality of first contact electrodes 31 are arranged in a lattice shape and a matrix shape in the heat generating portion 11. Further, the first contact electrodes 31 are connected to each other via the intermediate electrode 34. Further, each first contact electrode 31 is connected to a power supply terminal via an intermediate electrode 34.

Therefore, the first sheet member 10 has a plurality of dome portions 10a arranged in a grid and in a matrix. Among any one of the plurality of dome portions 10a, a certain relationship is established regardless of which pair of adjacent dome portions 10a is taken. The relationship means that the shortest distance between the pair of dome portions 10a is smaller than any of the maximum diameters of the pair of dome portions 10a. Here, the maximum diameter of a certain dome portion 10a refers to the longest distance among the linear distances from one point to the other one of the outer edge portions of the dome portion 10a. If the outer edge portion of the dome portion 10a is circular, the maximum diameter of the dome portion 10a is the diameter. With this configuration, the plurality of dome portions 10a can be densely arranged.

Note that the above relationship does not hold for any pair of adjacent dome portions 10a, but a part of all combinations that can be selected as a pair of adjacent dome portions 10a from the plurality of dome portions 10a. The combination may be established. Even in this case, the effect that the plurality of dome portions 10a constituting the partial combination can be arranged densely is realized.

Further, as shown in FIG. 3B, the second insulating layer 21 has a plurality of second contact electrodes 32 arranged in a lattice pattern. When each first contact electrode 31 and each second contact electrode 32 face each other and the second insulating layer 21 is superimposed on the first insulating layer 12, each second contact electrode 32 and each first contact electrode 31 are It is arranged at the overlapping position. The second contact electrodes 32 are connected to each other via the intermediate electrode 35. Further, each second contact electrode 32 is connected to a ground terminal via an intermediate electrode 35.

Therefore, the second sheet member 20 has a plurality of dome portions 20a arranged in a lattice pattern. Among any one of the plurality of dome parts 20a, a certain relationship is established regardless of which pair of adjacent dome parts 20a is taken. The relationship means that the shortest distance between the pair of dome portions 20a is smaller than any of the maximum diameters of the pair of dome portions 20a. Here, the maximum diameter of a certain dome portion 20a refers to the longest distance among linear distances from one point to the other one of the outer edge portions of the dome portion 20a. If the outer edge portion of the dome portion 20a is circular, the maximum diameter of the dome portion 20a is the diameter. With this configuration, the plurality of dome portions 20a can be densely arranged.

Note that the above relationship does not hold for any pair of adjacent dome portions 20a, but a part of all combinations that can be selected as a pair of adjacent dome portions 20a from the plurality of dome portions 20a. The combination may be established. Even in this case, the effect that the plurality of dome portions 20a constituting the partial combination can be arranged densely is realized.

Here, the arrangement of the plurality of first contact electrodes 31 will be described in more detail. In each row in the matrix arrangement of the plurality of first contact electrodes 31, the combination of the positions in the column direction of all the first contact electrodes 31 in the row, and all the first contact electrodes 31 in the row adjacent to the row. The combinations of positions in the column direction are different. More specifically, in each row, the combination of the positions in the column direction of all the first contact electrodes 31 in the row and the combination of the positions in the column direction of all the first contact electrodes 31 in the row adjacent to the row are: The first predetermined length is shifted. The first predetermined length is a distance between the centers of two first contact electrodes 31 adjacent in the column direction.

Note that the row direction in the matrix arrangement of the plurality of first contact electrodes 31 coincides with the direction of the axis Y, and the column direction coincides with the direction of the axis X.

Also, the position of the first contact electrode 31 at one end in the column direction is alternately shifted in the column direction for each row. Further, the position of the first contact electrode 31 at the other end in the column direction is alternately shifted in the column direction for each row and opposite to the one end of the first contact electrode 31 in the column direction. As a result, the length in the column direction of the entire first contact electrodes 31 belonging to the same row is alternately increased or decreased for each row. The number of first contact electrodes 31 belonging to the same row is also increased or decreased alternately for each row.

In each column, the combination of the positions in the row direction of all the first contact electrodes 31 in the column and the combination of the positions in the row direction of all the first contact electrodes 31 in a column adjacent to the column are different. Yes. More specifically, in each column, combinations of positions in the row direction of all the first contact electrodes 31 in the column, and positions in the row direction of all the first contact electrodes 31 in a column adjacent to the column. Are shifted by a second predetermined length. The second predetermined length is a distance between the centers of two first contact electrodes 31 adjacent in the row direction, and is longer than the first predetermined length.

Further, in each row, a range of existing positions in the row direction of all the first contact electrodes 31 in the row and a range of existing positions in the row direction of all the first contact electrodes 31 in a row adjacent to the row are: Partly overlap.

Further, in each column, the range of the position in the column direction of all the first contact electrodes 31 in the column, and the range of the position in the column direction of all the first contact electrodes 31 in the column adjacent to the column, But partially overlap.

Further, in this example, the first contact electrodes 31 other than the first contact electrodes 31 at the end portions are surrounded by the six first contact electrodes 31 closest to each other.

In this example, the first contact electrode 31 other than the first contact electrode 31 at the end includes another first contact electrode 31 whose distance from the center of the first contact electrode 31 is equal to or less than the reference distance. There are only six. Here, the reference distance is a distance having the same length as the maximum diameter of the first contact electrode 31.

In this example, each first contact electrode 31 and the other first contact electrode closest to the first contact electrode 31 are arranged in the column direction. In this example, each first contact electrode 31 and the other first contact electrode closest to the first contact electrode 31 are arranged in a direction intersecting the column direction at an angle of 60 °.

In addition, it can be said that the arrangement feature of the first contact electrode 31 is the same for the dome portion 10a, the second contact electrode 32, and the dome portion 10b.

FIG. 4 is a diagram for explaining the operation of the contact detection unit 53. Here, description will be made assuming that the heat generating portion 11 and the first contact electrode 31 are insulated. The first contact electrode 31 and the second contact electrode 32 are connected in series with the power source 50 and the resistor 51. The contact detection unit 53 outputs a signal indicating that an object is in contact with the heater device 1 when the voltage between the terminals of the resistor 51 is equal to or higher than a predetermined voltage. Moreover, the contact detection part 53 outputs the signal which shows that there is no contact of the object to the heater apparatus 1, when the voltage between the terminals of the resistance 51 is less than predetermined voltage. The signal output from the contact detection unit 53 is input to a control unit (not shown).

As shown to (a) of FIG. 4, when there is no contact of the object with the heat generating part 11, and between the 1st contact electrode 31 and the 2nd contact electrode 32 is open | released, the 1st contact electrode 31 and the 2nd The contact electrode 32 becomes non-conductive and no current flows through the resistor 51. At this time, the voltage between the terminals of the resistor 51 is less than a predetermined voltage. Therefore, the contact detection unit 53 outputs a signal indicating that there is no object contact to the heater device 1 to the control unit.

In addition, as shown in FIG. 4B, when an object comes into contact with the heat generating part 11 and the first contact electrode 31 and the second contact electrode 32 are short-circuited, the first contact electrode 31 and the second contact point. The electrode 32 becomes conductive and current I flows through the resistor 51. At this time, the voltage between the terminals of the resistor 51 is equal to or higher than a predetermined voltage. Therefore, the contact detection unit 53 outputs a signal indicating that an object is in contact with the heater device 1 to the control unit.

In addition, since the 1st contact electrode 31 of this embodiment is formed in the one surface side of the heat generating part 11, when the short circuit between the 1st contact electrode 31 and the 2nd contact electrode 32 is carried out, it is the 1st contact from the power supply 50. A current flows through the electrode 31, the second contact electrode 32, and the resistor 51 to the ground terminal.

Next, a method for forming the second contact electrode 32 will be described with reference to FIG. Here, an example of forming one second contact electrode 32 by printing the contact electrode paste 100 on the second insulating layer 21 is shown. The following molding method may be performed entirely by an operator using various apparatuses, or may be performed automatically by an automatic molding apparatus. In addition, in the following molding method, an operator may perform a part using various apparatuses and the automatic molding apparatus may automatically perform the remaining part.

First, as shown in FIG. 5A, the main body performing this molding method prepares the second insulating layer 21 and prints it on one side of the second insulating layer 21 by printing at room temperature (for example, 25 ° C.). A contact electrode paste 100 is formed. Here, the contact electrode paste 100 having a larger linear expansion coefficient than the second insulating layer 21 is selected.

Next, as shown in FIG. 5B, the main body dries the contact electrode paste 100 under a high temperature on the second insulating layer 21 on which the contact electrode paste 100 is formed. Specifically, the contact electrode paste 100 is dried at a temperature equal to or higher than the glass transition temperature of the contact electrode paste 100. Thereby, the contact electrode paste 100 is cured and the contact electrode paste 100 is fixed to the second insulating layer 21.

At this time, since the contact electrode paste 100 has a larger linear expansion coefficient than the second insulating layer 21, the contact electrode paste 100 extends more in the XY plane direction than the second insulating layer 21. That is, the contact electrode paste 100 is cured and the contact electrode 32 is bonded to the second insulating layer 21 in a state where the contact electrode paste 100 extends more in the XY plane direction than the second insulating layer 21.

Next, the main body cools the second insulating layer 21 on which the contact electrode 32 is formed and returns it to room temperature. Then, as shown in FIG. 5C, the contact electrode 32 and the second insulating layer 21 try to return to their original sizes. At this time, since the contact electrode 32 has a larger linear expansion coefficient than the second insulating layer 21, the contact electrode 32 tends to return larger than the second insulating layer 21. That is, since the contact electrode 32 contracts more than the second insulating layer 21, a difference in circumferential length occurs. As a result, a dome shape in which the contact electrode 32 is disposed on the inner surface side is formed.

In addition, the continuous dome shape as shown in FIG. 2 can be formed by printing the contact electrode paste 100 on the second insulating layer 21 at regular intervals.

The method for forming the second contact electrode 32 has been described above. The same operation can be performed when the first contact electrode 31 is formed on the first insulating layer 12. However, the heat generating portion 11 is provided between the first contact electrode 31 and the first insulating layer 12. However, when the ambient temperature of the first insulating layer 12 is changed, the heat generating portion 11 expands and contracts similarly to the first insulating layer 12.

That is, even if the heat generating portion 11 is provided between the first contact electrode 31 and the first insulating layer 12, the linear expansion coefficient of the contact electrode paste is made larger than that of the first insulating layer 12. As a result, the contact electrode paste expands and contracts more greatly in response to temperature changes than the first insulating layer 12 and the heat generating portion 11, so that a dome shape similar to that for forming the second contact electrode 32 can be formed. .

The first and

second contact electrodes

31, 32 are arranged over the entire heat generating part 11 so that there is no gap of 4 millimeters or more. Specifically, the first and

second contact electrodes

31 and 32 are arranged at intervals of 4 to 5 millimeters. For example, the center points of the first and

second contact electrodes

31 and 32 are arranged at intervals of 4 to 5 millimeters. That is,

such dome portions

10a and 20a are arranged at intervals of 4 to 5 millimeters. By arranging the

dome portions

10a and 20a at intervals of 4 to 5 millimeters in this way, it is possible to reliably detect contact even when a child's finger contacts.

As described above, the dome portion 10 a is formed on the first sheet member 10 and the dome portion 20 a is formed on the second sheet member 20. Thereafter, when the first sheet member 10 and the second sheet member 20 are fixed to each other in a region around the portion where the first contact electrode 31 and the second contact electrode 32 arranged so as to face each other, the heater device is completed. To do.

According to the configuration described above, the portion of the first sheet member 10 where the first contact electrode 31 is formed and the portion of the second sheet member 20 where the second contact electrode 32 is formed are the

dome portions

10a and 20a, respectively. It is configured. The

dome portions

10 a and 20 a have a hollow dome shape that is convex toward the opposite surface side with respect to the opposing surfaces of the first sheet member 10 and the second sheet member 20. And the force which ensures the space | interval of a 1st electrode and a 2nd electrode arises with such a shape. Therefore, a space between the electrodes can be secured without increasing the heat capacity.

Further, the

dome portions

10a and 20a are configured in both the portion of the first sheet member 10 where the first contact electrode 31 is formed and the portion of the second sheet member 20 where the second contact electrode 32 is formed. Accordingly, the distance between the first contact electrode 31 and the second contact electrode 32 can be increased as compared with the case where the dome portion is formed on one of the first sheet member 10 and the second sheet member 20. it can.

Further, the contact detection unit 53 detects contact or non-contact of an object with the first sheet member 10 based on whether or not the first contact electrode 31 and the second contact electrode 32 are in a conductive state. Therefore, it is possible to easily detect contact or non-contact of an object with the first sheet member 10.

Further, the first contact electrode 31 formed on the first sheet member 10 and the second contact electrode 32 formed on the second sheet member 20 are arranged over the entire heat generating portion 11 so that there is no gap of 4 millimeters or more. Yes. Therefore, for example, even when a child's finger contacts, it is possible to reliably detect contact.

Further, the first sheet member 10 and the second sheet member 20 are fixed

portions

10x and 20x, which are regions around the portion where the first contact electrode 31 and the second contact electrode 32 arranged so as to face each other, They are fixed to each other. Thus, the 1st sheet member 10 and the 2nd sheet member 20 can be fixed in the field around the part in which the 1st contact electrode 31 and the 2nd contact electrode 32 arranged so that it opposes were formed.

Further, the portion of the first sheet member 10 where the first contact electrode 31 is formed is configured as a dome portion 10 a, and the first contact electrode 31 is a conductive paste having a larger linear expansion coefficient than the first insulating layer 12. Can be used.

The portion of the second sheet member 20 where the second contact electrode 32 is formed is configured as a dome portion 20a, and the second contact electrode 32 is a conductive paste having a larger linear expansion coefficient than the second insulating layer 21. Can be used.

The main body prints a conductive paste having a linear expansion coefficient larger than that of the first insulating layer 12 on the first insulating layer 12 and also performs a second insulation on the conductive paste having a linear expansion coefficient larger than that of the second insulating layer 21. Print on layer 21. After that, the main body formed the first contact electrode 31 in the first insulating layer 12 by drying and curing the conductive paste printed on the first insulating layer 12 and the second insulating layer 21 at a high temperature.

Domes

10a and 20a are formed in the portion and the portion of the second insulating layer 21 where the second contact electrode 32 is formed.

The heater device 1 can be manufactured by such a manufacturing method. Moreover, a dome part is comprised in the part in which the electrode was formed, without performing separately the process of forming a contact in the 1st sheet member 10 or the 2nd sheet member 20, and the process of processing the

dome parts

10a and 20a. Can do.

When the conductive paste printed on the first insulating layer 12 and the second insulating layer 21 is dried and cured at a high temperature, the conductive paste printed on the first insulating layer 12 and the second insulating layer 21 is used. Is preferably dried and cured at a temperature equal to or higher than the glass transition temperature of the conductive paste.

(Second Embodiment)
The configuration of the heater device 1 according to the second embodiment will be described with reference to FIG. FIG. 6 is a cross-sectional view of the heater device of the present embodiment. In the heater device 1 of the first embodiment, both the portion where the first contact electrode 31 is formed in the first sheet member 10 and the portion where the second contact electrode 32 is formed in the second sheet member 20 are both dome portions. 10a and 20a. On the other hand, in the heater device 1 of the present embodiment, the portion where the second contact electrode 32 is formed in the second sheet member 20 is configured as the dome portion 20a, but the first contact in the first sheet member 10 is configured. The portion where the electrode 31 is formed is flat.

Here, the second insulating layer 21 side forms a hollow dome shape, and the first insulating layer 12 side is configured to be flat, but the first insulating layer 12 side forms a hollow dome shape, You may comprise so that the 2nd insulating layer 21 side may become flat.

In the present embodiment, it is possible to obtain the same effect as that of the first embodiment, which is the same as that obtained from the configuration common to the first embodiment. That is, even when the dome shape is formed only on one of the first sheet member 10 and the second sheet member 20, the same effect as that of the heater device of the first embodiment can be obtained.

(Third embodiment)
The configuration of the heater device 1 according to the third embodiment will be described with reference to FIG. FIG. 7 is a cross-sectional view of the heater device 1 of the present embodiment. In each said embodiment, between the 1st sheet member 10 and the 2nd sheet member 20 was made to adhere by thermocompression bonding.

In contrast, in the heater device 1 of the present embodiment, the adhesive 60 is bonded between the fixing portion 10x of the first sheet member 10 and the fixing portion 20x of the second sheet member 20. The distance between the first contact electrode 31 and the second contact electrode 32 can be increased by bonding the first sheet member 10 and the second sheet member 20 with the adhesive 60.

In the present embodiment, it is possible to obtain the same effect as that of the first embodiment, which is the same as that obtained from the configuration common to the first embodiment.

In addition, as a method of adhering between the adhering portion 10x of the first sheet member 10 and the adhering portion 20x of the second sheet member 20, in addition to the above-described thermocompression bonding and bonding with the adhesive 60, for example, by thermal wearing It can also be fixed.

(Fourth embodiment)
The configuration of the heater device 1 according to the fourth embodiment will be described with reference to FIGS. FIG. 8 is a cross-sectional view of the heater device 1 of the present embodiment. FIG. 9 is a diagram for explaining the operation of the contact detection unit of the heater device 1 of the present embodiment. FIG. 10 is a view showing the arrangement of the first contact electrode and the second contact electrode of the heater device 1 according to the present embodiment.

In the heater device 1 of the first embodiment, the first contact electrode 31 has a circular shape. On the other hand, in the heater device 1 of the present embodiment, as shown in FIGS. 10A and 10B, the first contact electrode is divided into the first contact electrode 31a and the first contact electrode 31b. ing. Specifically, the first contact electrode 31a and the first contact electrode 31b each have a semicircular shape. The first contact electrode 31a has a positive polarity, and the first contact electrode 31b has a negative polarity.

As shown in FIG. 10A, the first contact electrodes 31a are connected to each other via the intermediate electrode 34a. Each first contact electrode 31a is connected to a power supply terminal via an intermediate electrode 34a.

The first contact electrodes 31b are connected to each other via the intermediate electrode 34b. Each first contact electrode 31b is connected to a ground terminal via an intermediate electrode 34b.

In the heater device 1 of the present embodiment, the intermediate electrode 34a connected to the power supply terminal and the intermediate electrode 34b connected to the ground terminal are formed on the first sheet member 10 side.

As shown in FIG. 10B, the second contact electrodes 32 of the heater device 1 of the present embodiment are electrically separated. Each second contact electrode 32 is provided as a conductor that conducts between the first contact electrode 32a and the first contact electrode 32b.

FIG. 9 is a diagram for explaining the operation of the contact detection unit 53. The

first contact electrodes

31 a and 31 b are disposed so as to face the second contact electrode 32. When the first contact electrode 31a and the second contact electrode 32 and the first contact electrode 31b and the second contact electrode 32 are open as shown in FIG. 9A, the first contact electrode 31a. And the second contact electrode 32 and between the first contact electrode 31b and the second contact electrode 32 become non-conductive. At this time, no current flows through the resistor 51. At this time, the voltage between the terminals of the resistor 51 is less than a predetermined voltage. Therefore, the contact detection unit 53 outputs a signal indicating that there is no object contact to the heater device 1 to the control unit.

Further, as shown in FIG. 9B, an object comes into contact with the heat generating portion 11, and the first contact electrode 31a and the second contact electrode 32 are short-circuited, and the first contact electrode 31b and the second contact are also short-circuited. When the electrode 32 is short-circuited, the first contact electrode 31 a and the first contact electrode 31 b are in a conductive state via the second contact electrode 32, and a current I flows through the resistor 51. At this time, the voltage between the terminals of the resistor 51 is equal to or higher than a predetermined voltage. Therefore, the contact detection unit 53 outputs a signal indicating that an object is in contact with the heater device 1 to the control unit.

According to the configuration described above, the first contact electrode 32a and the first contact electrode 32b are arranged on the first sheet member 10 side, respectively, and the intermediate electrode 34a connected to the power supply terminal and the intermediate connected to the ground terminal The electrode 34b is disposed on the first sheet member 10 side. Therefore, the intermediate electrode 34a connected to the power supply terminal and the intermediate electrode 34b connected to the ground terminal can be formed on the sheet member on one side. Thereby, the structure of the external wiring connected to the power supply terminal and the ground terminal can be simplified.

(Fifth embodiment)
The configuration of the heater device 1 according to the fifth embodiment will be described with reference to FIG. FIG. 11 is a cross-sectional view of the heater device 1 of the present embodiment. In the heater device 1 of the first embodiment, the first contact electrode 31 is formed on one surface side of the heat generating portion 11 in the first sheet member 10. On the other hand, in the heater device 1 of this embodiment, the insulating layer 13 is disposed between the heat generating portion 11 and the first contact electrode 31.

As described above, the insulating layer 13 may be disposed between the heat generating part 11 and the first contact electrode 31 to insulate the heat generating part 11 and the first contact electrode 31.

(Sixth embodiment)
The configuration of the heater device 1 according to the sixth embodiment will be described with reference to FIG. FIG. 12 is a front view of the heater device 1 of the present embodiment. In the heater device 1 according to the first embodiment, the first contact electrode 31 and the second contact electrode 32 are arranged in regions covering almost the entire area of the heat generating portion 11. On the other hand, in the heater device 1 of the present embodiment, the first contact electrode 31 and the second contact electrode 32 are arranged in a partial region of the center with respect to the heat generating portion 11 spreading in a planar shape.

That is, in the region where the first contact electrode 31 and the second contact electrode 32 are disposed, the contact of the object is detected, and in the region where the first contact electrode 31 and the second contact electrode 32 are not disposed, the contact of the object is detected. It is configured not to detect.

Further, the first contact electrode 31 and the second contact electrode 32 can be arranged in a partial region with respect to the heat generating portion 11 spreading in a planar shape.

(Other embodiments)
(1) In each of the above embodiments, the contact electrode paste 100 is applied by printing. However, for example, the contact electrode paste 100 may be applied manually.

(2) In the above embodiments, the contact electrode paste 100 is dried at a temperature equal to or higher than the glass transition temperature of the contact electrode paste 100. If the contact electrode paste 100 does not have a glass transition point, the contact electrode paste 100 may be dried at a temperature equal to or higher than the softening temperature of the contact electrode paste 100. In addition, when the heat generation temperature of the heat generating portion 11 is equal to or higher than the glass transition temperature or the softening temperature, the dome-shaped

dome portions

10a and 20a may be deformed. For this reason, the heater device is configured so that the heat generation temperature of the heat generating portion 11 is lower than the glass transition temperature or lower than the softening temperature of the contact electrode paste 100.

(3) In the first embodiment, after the contact electrode paste 100 having a larger linear expansion coefficient than the insulating layer is printed on the insulating layer, and the contact electrode paste 100 printed on the insulating layer is dried and cured at a high temperature The

dome portions

10a and 20a were configured by cooling the insulating layer and returning to normal temperature. On the other hand, you may make it comprise the

dome parts

10a and 20a in the insulating layer which formed the contact electrode using the shaping | molding die. Moreover, you may make it comprise the

dome parts

10a and 20a in an insulating layer by arrange | positioning a convex contact electrode in a film-like insulating layer.

(4) In each of the above embodiments, the example in which the heater device 1 is mounted on a vehicle has been described. However, the present invention is not limited to the one mounted on the vehicle.

(5) In the above embodiments, the outer edge portions of the

dome portions

10a and 20a are circular. However, the outer edge portions of the

dome portions

10a and 20a are not limited to a circle but may be a polygon.

(6) In each of the above embodiments, the arrangement of the plurality of first contact electrodes 31 may be as shown in FIG. In the example of FIG. 13, the point that the plurality of first contact electrodes 31 are arranged in a matrix is the same as in each of the above embodiments.

However, in the example of FIG. 13, in any two rows, the combination of the positions in the column direction of all the first contact electrodes 31 in one row and the column direction of all the first contact electrodes 31 in the other row. The combination of positions is the same. Therefore, in each row, the combination of the positions in the column direction of all the first contact electrodes 31 in the row and the combination of the positions in the column direction of all the first contact electrodes 31 in the row adjacent to the row are the same. .

Further, in this example, in any two columns, the combination of the positions in the row direction of all the first contact electrodes 31 in one column and the position in the row direction of all the first contact electrodes 31 in the other column. The combination of is the same. Therefore, in each column, the combination of the positions in the row direction of all the first contact electrodes 31 in the column and the combination of the positions in the row direction of all the first contact electrodes 31 in the row adjacent to the column are the same. It is.

In this example, in each row, the range of the existing positions in the row direction of all the first contact electrodes 31 in that row, and the range of the existing positions in the row direction of all the first contact electrodes 31 in the row adjacent to that row. Does not overlap even partially.

Further, in this example, in each column, the range of the position of all the first contact electrodes 31 in the column in the column direction, and the position of all the first contact electrodes 31 in the column adjacent to the column in the column direction. This range does not overlap even partly.

Further, in this example, the first contact electrodes 31 other than the first contact electrodes 31 at the end portions are surrounded by only the four first contact electrodes 31 closest to each other.

In this example, the first contact electrode 31 other than the first contact electrode 31 at the end includes another first contact electrode 31 whose distance from the center of the first contact electrode 31 is equal to or less than the reference distance. There are only four. Here, the reference distance is a distance having the same length as the maximum diameter of the first contact electrode 31.

In this example, each first contact electrode 31 and the other first contact electrode closest to the first contact electrode 31 are arranged in the column direction. In this example, each first contact electrode 31 and the other first contact electrode closest to the first contact electrode 31 are arranged in the row direction.

Also, the positions of the first contact electrodes 31 at both ends in the column direction are the same in any row. As a result, the length of the entire first contact electrode 31 belonging to the same row in the column direction is the same in any row. The number of first contact electrodes 31 belonging to the same row is the same in every row.

Note that the present disclosure is not limited to the above-described embodiment, and can be changed as appropriate. In addition, the above embodiments are not irrelevant to each other, and can be appropriately combined unless the combination is clearly impossible. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case.

(Summary)
According to the first aspect shown in part or all of the above embodiment, the heater device includes a portion where the first electrode in the first sheet member is formed and a second electrode in the second sheet member. At least one of these portions is configured as a dome portion having a dome shape that is convex toward the opposite surface side with respect to the opposing surfaces of the first sheet member and the second sheet member. And the force which ensures the space | interval of a 1st electrode and a 2nd electrode arises with such a shape. Therefore, a space between the electrodes can be secured without increasing the heat capacity.

According to the second aspect, the dome portion is configured in both the portion of the first sheet member where the first electrode is formed and the portion of the second sheet member where the second electrode is formed. Thereby, the distance of a 1st electrode and a 2nd electrode can be lengthened compared with the case where a dome part is comprised in either one of a 1st sheet member and a 2nd sheet member.

According to a third aspect, a contact detection unit that detects contact or non-contact of an object with the first sheet member based on whether or not the first electrode and the second electrode are in a conductive state is provided. Thereby, it is possible to easily detect contact or non-contact of an object with the first sheet member.

According to the 4th viewpoint, the 1st electrode formed in the 1st sheet member and the 2nd electrode formed in the 2nd sheet member are arranged over the whole exothermic part 11 so that there may be no gap of 4 millimeters or more. Yes. Thereby, even when a child's finger contacts, it is possible to reliably detect contact.

According to the fifth aspect, the first sheet member and the second sheet member are fixed to each other in a region around the portion where the first electrode and the second electrode arranged to face each other are formed. In this manner, the first sheet member and the second sheet member can be fixed in the region around the portion where the first electrode and the second electrode arranged to face each other are formed.

According to the sixth aspect, the portion of the first sheet member where the first electrode is formed is configured as a dome portion, and the first electrode is made of a conductive paste having a larger linear expansion coefficient than the first insulating layer. It is formed using. Thus, the first electrode can be formed using a conductive paste having a larger linear expansion coefficient than the first insulating layer.

According to the seventh aspect, the portion of the second sheet member where the second electrode is formed is configured as a dome portion, and the second electrode is made of a conductive paste having a larger linear expansion coefficient than the second insulating layer. It is formed using. Thus, the second electrode can be formed using a conductive paste having a larger linear expansion coefficient than the second insulating layer.

According to an eighth aspect, the heater device includes a first sheet member (10) and a second sheet member (20). The first sheet member is formed on a sheet-like heat generating portion that generates heat when energized, a first insulating layer on which the heat generating portion is provided on one surface side, and a surface opposite to the first insulating layer side of the heat generating portion. A plurality of first electrodes. The second sheet member includes a second insulating layer (21) disposed to face the one surface of the first insulating layer, and the plurality of first electrodes formed on the first insulating layer of the second insulating layer. A plurality of second electrodes (32) formed at opposing positions. At least one of the portion of the first sheet member where the plurality of first electrodes are formed and the portion of the second sheet member where the plurality of second electrodes are formed are the first sheet member and the second sheet. It is configured as a plurality of dome portions (10a, 20a) that form a dome shape convex toward the opposite surface side with respect to the opposing surfaces of the members. The shortest distance between a pair of adjacent dome parts among the plurality of dome parts is smaller than any of the maximum diameters of the pair of dome parts.

According to a ninth aspect, there is provided a method for manufacturing a heater device, wherein a conductive paste having a linear expansion coefficient larger than that of a first insulating layer is applied to the first insulating layer, and a wire is formed more than the second insulating layer. At least one of applying a conductive paste having a large expansion coefficient to the second insulating layer is performed. Thereafter, the conductive paste applied to at least one of the first insulating layer and the second insulating layer is dried and cured at a high temperature, so that the portion of the first insulating layer where the first electrode is formed and the second insulating layer A dome portion is formed on at least one of the portions where the second electrode is formed.

The heater device according to the present disclosure can be manufactured by such a manufacturing method. Further, the dome portion can be formed in the portion where the electrode is formed without separately performing the step of forming the contact point on the first sheet member or the second sheet member and the step of processing the dome portion.

According to the tenth aspect, the conductive paste applied to at least one of the first insulating layer and the second insulating layer is dried and cured at a temperature equal to or higher than the glass transition temperature of the conductive paste or equal to or higher than the softening temperature of the conductive paste. It is preferable to do so.

Claims

A sheet-like heat generating portion (11) that generates heat when energized, a first insulating layer (12) provided with the heat generating portion on one side, and a surface opposite to the first insulating layer side of the heat generating portion. A first sheet member (10) having a first electrode (31, 31a, 31b);
A second insulating layer (21) disposed opposite to the one surface of the first insulating layer; and a second electrode (32) formed at a position facing the first electrode of the second insulating layer. A heater device comprising a second sheet member (20),
At least one of the portion of the first sheet member where the first electrode is formed and the portion of the second sheet member where the second electrode is formed opposes the first sheet member and the second sheet member. The heater apparatus comprised as a dome part (10a, 20a) which makes the dome shape which becomes convex toward the opposite surface side with respect to a surface.
2. The heater according to claim 1, wherein the dome portion is configured in both a portion of the first sheet member where the first electrode is formed and a portion of the second sheet member where the second electrode is formed. apparatus.
The contact detection part (53) provided with the contact detection part (53) which detects the contact or non-contact of the object to the said 1st sheet | seat member based on whether the said 1st electrode and the said 2nd electrode are a conduction | electrical_connection state. The heater apparatus as described in.
2. The first electrode formed on the first sheet member and the second electrode formed on the second sheet member are arranged over the entire heat generating portion so that there is no gap of 4 mm or more. The heater apparatus as described in any one of thru | or 3.
The said 1st sheet | seat member and the said 2nd sheet | seat member are mutually adhere | attached in the area | region around the part in which the said 1st electrode arrange | positioned so as to oppose and the said 2nd electrode were formed. The heater apparatus as described in any one.
The portion of the first sheet member where the first electrode is formed is configured as the dome portion,
The heater device according to any one of claims 1 to 5, wherein the first electrode is formed using a conductive paste having a larger linear expansion coefficient than the first insulating layer.
The portion of the second sheet member where the second electrode is formed is configured as the dome portion,
The heater device according to any one of claims 1 to 6, wherein the second electrode is formed using a conductive paste having a larger linear expansion coefficient than the second insulating layer.
A sheet-like heat generating portion (11) that generates heat when energized, a first insulating layer (12) provided with the heat generating portion on one side, and a surface opposite to the first insulating layer side of the heat generating portion. A first sheet member (10) having a plurality of first electrodes (31, 31a, 31b);
The second insulating layer (21) disposed opposite to the one surface of the first insulating layer and the plurality of first electrodes formed on the first insulating layer of the second insulating layer. A second sheet member (20) having a plurality of second electrodes (32), and a heater device comprising:
At least one of the portion of the first sheet member where the plurality of first electrodes are formed and the portion of the second sheet member where the plurality of second electrodes are formed are the first sheet member and the second sheet. It is configured as a plurality of dome parts (10a, 20a) that form a dome shape convex toward the opposite surface side with respect to the opposing surface of the member,
The shortest distance between a pair of adjacent dome parts among the plurality of dome parts is a heater device smaller than any of the maximum diameters of the pair of dome parts.
A sheet-like heat generating portion (11) that generates heat when energized, a first insulating layer (12) provided with the heat generating portion on one side, and a surface opposite to the first insulating layer side of the heat generating portion. A first sheet member (10) having first electrodes (31, 31a, 31b), a second insulating layer (21) disposed opposite to the one surface of the first insulating layer, and the second insulating member. A second sheet member (20) having a second electrode (32) formed at a position facing the first electrode formed on the first insulating layer of the first sheet member, and the first sheet member At least one of the portion where the first electrode is formed and the portion where the second electrode is formed on the second sheet member is opposite to the opposing surfaces of the first sheet member and the second sheet member Dome with a dome shape that protrudes toward the surface 10a, a manufacturing method of a heater apparatus is configured as 20a),
Applying a conductive paste having a linear expansion coefficient larger than that of the first insulating layer to the first insulating layer; and applying a conductive paste having a linear expansion coefficient larger than that of the second insulating layer to the second insulating layer. The conductive paste applied to at least one of the first insulating layer and the second insulating layer is dried and cured at a high temperature, so that the first insulating layer in the first insulating layer is dried. The manufacturing method of the heater apparatus which comprises the said dome part (10a, 20a) in at least one of the part in which the said 2nd electrode was formed in the part in which the 1 electrode was formed, and the said 2nd insulating layer.
The conductive paste applied to at least one of the first insulating layer and the second insulating layer is dried and cured at a temperature equal to or higher than a glass transition temperature of the conductive paste or equal to or higher than a softening temperature of the conductive paste. A method for manufacturing the heater device according to claim 9.