JP2015030430A - Integrated sensor device and method for producing the same, and contact member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an integrated sensor device and a method for producing the same, and a contact member, allowing detection of an accurate temperature of the inner face of a windshield, and allowing reduction of assembling man-hours.SOLUTION: An integrated sensor device 10 includes: a contact member 20; a first sensor 30 detecting a humidity of the inner face 100b of a windshield; and a second sensor 40 detecting a raindrop of the outer face 100a of the windshield. The contact member 20 has a light transmission part 21 in a portion provided oppositely to an inner face temperature detection element 31 of the first sensor 30, and has a high heat transfer part 22 in a portion provided oppositely to a lens part 41 of the second sensor 40. Thereby, the inner face temperature detection element 31 can detect an accurate temperature of the inner face 100b of the windshield. The light transmission part 21 can be disposed in a state that the light transmission part 21 contacts with the lens part 41, and the high heat transfer part 22 can be disposed in a state that the high heat transfer part 22 contacts with the inner face temperature detection element 31. Accordingly, assembling man-hours can be reduced.

Description

  The present invention relates to an integrated sensor device that includes a contact member and is disposed on an inner surface of a windshield of a vehicle, a manufacturing method thereof, and a contact member.

  Conventionally, a raindrop detection device (integrated sensor device) disposed on the inner surface of a windshield of a vehicle is known. This raindrop detection apparatus includes a humidity detection unit (first sensor) that detects humidity on the inner surface of the windshield and a raindrop detection unit (second sensor) that detects raindrops on the outer surface of the windshield.

  The humidity detection unit includes an in-vehicle humidity element (in-vehicle humidity detection element) that detects humidity inside the vehicle, an in-vehicle temperature element (in-vehicle temperature detection element) that detects the temperature inside the vehicle, and a window that detects the temperature of the inner surface of the windshield. It has a shield temperature element (inner surface temperature detection element). Between the windshield temperature element and the inner surface of the windshield, a heat conductive member (high heat transfer portion) having high heat conductivity is interposed. The raindrop detection unit includes a lens (lens unit), and silicon (light transmission unit) that transmits light is interposed between the lens and the windshield.

JP2013-11559A

  In Patent Document 1, silicon and the heat conducting member are separate members, and it is necessary to bond them together. Therefore, even if silicon is bonded to the lens with high positional accuracy, a positional shift may occur when the heat conducting member is bonded to the windshield temperature element. And there exists a possibility that a heat conductive member may contact a lens by this position shift.

  Since heat generated in the raindrop detector is transmitted to the lens, if the position of the heat conducting member is displaced as described above, an error occurs in the detected temperature of the inner windshield temperature element. That is, the inner side windshield temperature element cannot detect an accurate temperature.

  Further, as described above, there is a problem that the number of assembling steps is large because bonding of silicon and the heat conducting member is necessary.

  In view of the above problems, an object of the present invention is to provide an integrated sensor device, a manufacturing method thereof, and a contact member that can detect an accurate temperature of the inner surface of the windshield and reduce the number of assembly steps.

  The invention disclosed herein employs the following technical means to achieve the above object. Note that the reference numerals in parentheses described in the claims and in this section indicate a corresponding relationship with specific means described in the embodiments described later as one aspect, and limit the technical scope of the invention. Not what you want.

  One of the disclosed inventions is an integrated sensor device (10) disposed on an inner surface (100b) of a windshield (100) of a vehicle, and has one surface (20a) and a back surface (20b) opposite to the one surface. And a contact member (20) whose one surface is disposed in contact with the inner surface of the windshield, and an inner surface temperature detection element which is disposed in contact with the rear surface of the contact member and detects the temperature of the inner surface of the windshield via the contact member ( 31), a lens part (41) disposed in contact with a part different from the first sensor on the back surface of the contact member, and irradiating the windshield with the reference light through the lens part And a light receiving element (43) that receives the reference light reflected by the windshield through the lens unit, and has an outer surface (100a) of the windshield. A second sensor (40) for detecting raindrops, wherein the contact member is provided facing the lens unit, and transmits a reference light and a reflected reference light, a light transmission part (21), and a light transmission part And a high heat transfer portion (22) that is provided so as to face at least the inner surface temperature detection element and has higher thermal conductivity than the light transmission portion.

  According to this, the light transmission part and the high heat-transfer part are implement | achieved by the common contact member. For example, when the light transmission part is placed in contact with the lens part at a correct position, a two-dimensional position is determined in the entire contact member. Therefore, the high heat transfer portion does not come into contact with the lens portion. Thereby, it is possible to suppress the heat generated by the second sensor from being transmitted directly from the lens unit to the high heat transfer unit and being transmitted to the inner surface temperature detection element. Therefore, the inner surface temperature detecting element can detect the accurate temperature of the windshield inner surface.

  In addition, since the light transmission part and the high heat transfer part are realized in the common contact member, the light transmission part can be placed in contact with the lens part, and the high heat transfer part can be placed in contact with the inner surface temperature detection element. it can. Therefore, the assembly man-hour can be reduced as compared with the conventional art.

  In another disclosed invention, a contact member (20) having one surface (20a) in contact with an inner surface (100b) of a windshield (100) of a vehicle, and a temperature of the inner surface of the windshield are detected via the contact member. A first sensor (30) having an inner surface temperature detecting element (31) and a lens portion (41) disposed in contact with a back surface (20b) opposite to one surface of the contact member, and a windshield via the lens portion And a second sensor (40) for receiving the reference light reflected by the windshield through the lens unit, and manufacturing the integrated sensor device (10), and facing the lens unit A light transmission part (21) that transmits the reference light and the reflected reference light, and a part excluding the light transmission part, provided to face at least the inner surface temperature detection element, A contact member is prepared so as to have a high heat transfer portion (22) having a higher thermal conductivity than the portion and a cut (25a to 25d) between the light transmitting portion and the high heat transfer portion. The first sensor, the second sensor, and the contact member so that the lens portion is in contact with the light transmission portion and the inner surface temperature detection element is in contact with the high heat transfer portion on the back surface of the prepared contact member. And a dividing step of removing the portion of the contact member provided with the cut and dividing it into a light transmitting portion and a high heat transfer portion after the bonding step. To do.

  According to this, since the light transmission part and the high heat transfer part are divided, it is more effective that the heat generated in the second sensor and transmitted to the light transmission part is transferred from the light transmission part to the high heat transfer part. Can be suppressed. Therefore, the inner surface temperature detecting element can detect a more accurate temperature of the inner surface of the windshield.

  Furthermore, since the light transmission part and the high heat transfer part are configured as one contact member at the time of bonding, the light transmission part and the high heat transfer part can be bonded at a time in the same process. And since it divides | segments after a bonding process, it is not necessary to position with respect to each of a lens part and an internal surface temperature detection element, and an assembly man-hour can be reduced compared with the past.

  Another disclosed invention has one surface (20a) and a back surface (20b) opposite to the one surface, one surface being in contact with the inner surface (100b) of the windshield (100) of the vehicle, and the back surface being a windshield. The window shield is irradiated with the reference light via the inner surface temperature detecting element of the first sensor (30) having the inner surface temperature detecting element (31) for detecting the temperature of the inner surface and the lens portion (41), and the wind shield A contact member disposed in contact with the lens portion of the second sensor (40) that receives the reference light reflected by the lens portion through the lens portion, and is provided so as to face the lens portion and reflects the reference light and A light transmission part (21) that transmits the reference light, and a high heat transfer part (22) that is provided to face the inner surface temperature detection element and has a heat transfer property higher than that of the light transmission part. It is characterized in.

  According to this, since there exists an effect equivalent to an above-described integrated sensor apparatus, the description is abbreviate | omitted.

It is a top view which shows the state which has arrange | positioned the integrated sensor apparatus which concerns on 1st Embodiment in the windshield. It is sectional drawing which follows II-II of FIG. It is a top view which shows schematic structure of a contact member among the integrated sensor apparatuses which concern on 2nd Embodiment. It is sectional drawing which follows IV-IV of FIG. It is a top view which shows schematic structure of a contact member among the integrated sensor apparatuses which concern on 3rd Embodiment. It is sectional drawing which follows the VI-VI line of FIG. It is a figure which shows the manufacturing method of the integrated sensor apparatus which concerns on 4th Embodiment. It is a top view of the integrated sensor apparatus which concerns on 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, common or related elements are given the same reference numerals.

(First embodiment)
First, a schematic configuration of the integrated sensor device 10 will be described.

  The integrated sensor device 10 shown in FIGS. 1 and 2 detects raindrops on the outer surface 100a (hereinafter referred to as the windshield outer surface 100a) of the windshield 100 in the vehicle, and also detects the inner surface 100b (hereinafter referred to as the windshield inner surface) of the windshield 100. 100b)). The integrated sensor device 10 is disposed on the windshield inner surface 100b of the vehicle. The integrated sensor device 10 includes a contact member 20, a first sensor 30, and a second sensor 40. Furthermore, in this embodiment, the integrated sensor device 10 includes a connector 50 for external connection, and a housing 60 that houses the first sensor 30, the second sensor 40, and the connector 50.

  Next, the contact member 20 will be described.

  The contact member 20 is interposed between the first sensor 30 and the windshield inner surface 100b in order for the first sensor 30 described later to detect the temperature of the windshield inner surface 100b. Specifically, in order for an inner surface temperature detecting element 31 (to be described later) of the first sensor 30 to detect the temperature of the windshield inner surface 100b, the contact member 20 contacts the inner surface temperature detecting element 31 and the windshield inner surface 100b. Be placed.

  Further, the contact member 20 is interposed between the second sensor 40 and the windshield inner surface 100b so that the second sensor 40 described later detects raindrops on the windshield outer surface 100a. Specifically, in order to suppress a reflection loss on a lower surface 41a (hereinafter, referred to as a lens unit lower surface 41a) of the lens unit 41 (to be described later) of the second sensor 40 and a windshield inner surface 100b, the contact member 20 includes a lens unit. It arrange | positions in contact with the lower surface 41a and the windshield inner surface 100b.

  This contact member 20 has one surface 20a disposed in contact with the windshield inner surface 100b, and a back surface 20b opposite to the one surface 20a and disposed in contact with the lens portion lower surface 41a. In this embodiment, the contact member 20 has a silicon sheet formed by molding silicon into a sheet shape. The silicon sheet has adhesiveness, and one surface of the silicon sheet, that is, one surface 20a of the contact member 20 is attached to the windshield inner surface 100b. Moreover, a silicon sheet has high permeability | transmittance with respect to infrared rays, for example.

Moreover, a metal filler is added to a part of the silicon sheet, and the heat transfer property is enhanced with respect to the part where the metal filler is not added. The metal filler may be employed, for example, _γ-Al 2 _{O 3.}

  As the contact member 20, it is possible to adopt a member having a refractive index such that reflection loss at the interface with the lens portion 41 and the interface with the windshield 100 is small. Thus, the contact member 20 has the light transmission part 21 which is a part to which a metal filler is not added in the silicon sheet, and the high heat transfer part 22 which is a part to which the metal filler is added.

  In the present embodiment, the lens portion 41 is made of polycarbonate, and the windshield 100 is made of glass. The refractive index of silicon is 1.44, which is close to the refractive index of polycarbonate 1.56 and the refractive index of glass 1.62.

  Further, as shown in FIG. 1, the contact member 20 has a planar rectangular shape, and a light transmission part 21 and a high heat transfer part 22 are provided so as to divide the contact member 20 into two in the longitudinal direction. A two-dot chain line shown in FIG. 1 indicates a boundary between the light transmission part 21 and the high heat transfer part 22. As shown in FIG. 1, the light transmitting portion 21 is provided so as to face the entire lens portion lower surface 41a, and preferably larger than the lens portion lower surface 41a. The high heat transfer section 22 is provided so as to face an inner surface temperature detection element 31 (to be described later) of the first sensor 30, and is preferably provided also around the inner surface temperature detection element 31 in order to improve heat transfer efficiency. . In the present embodiment, it is provided larger than a first substrate 34 described later, and is also placed in contact with the first substrate 34.

  Next, the first sensor 30 will be described.

  The first sensor 30 includes an inner surface temperature detecting element 31 for detecting the temperature of the windshield inner surface 100b, an in-vehicle humidity detecting element 32 for detecting the humidity in the vehicle interior, an in-vehicle temperature detecting element 33 for detecting the temperature in the vehicle interior, And a first substrate 34. In the present embodiment, as shown in FIG. 2, the inner surface temperature detection element 31 is mounted on the surface of the first substrate 34 on the windshield 100 side and is disposed in contact with the high heat transfer portion 22. The in-vehicle humidity detecting element 32 and the in-vehicle temperature detecting element 33 are mounted on the surface of the first substrate 34 opposite to the surface on which the inner surface temperature detecting element 31 is mounted.

  The inner surface temperature detection element 31 detects the temperature of the windshield inner surface 100b via the high heat transfer section 22, and outputs a signal corresponding to the detected temperature. The in-vehicle humidity detection element 32 detects the humidity in the vicinity of the inner surface temperature detection element 31 in the vehicle interior, and outputs a signal corresponding to the detected humidity. The in-vehicle temperature detection element 33 detects the temperature in the vehicle interior and in the vicinity of the inner surface temperature detection element 31, and outputs a signal corresponding to the detected temperature.

  Output signals from the elements 31, 32, 33 are input to the ECU 44 via a terminal 60b inserted in the housing side wall 60a and a second substrate 45 described later. The ECU 44 calculates the humidity of the windshield inner surface 100b based on the input signal and determines the presence or absence of water droplets adhering to the windshield inner surface 100b. The ECU 44 outputs a detection signal to the outside via the connector 50 when detecting water droplets adhering to the windshield inner surface 100b. Accordingly, the air conditioner can be operated so that water droplets adhering to the windshield inner surface 100b are removed.

  As the inner surface temperature detection element 31 and the in-vehicle temperature detection element 33, for example, a thermistor can be employed. Further, as the in-vehicle humidity detection element 32, a resistance type or capacitance change type humidity detection element can be adopted.

  Next, the second sensor 40 will be described.

  The second sensor 40 includes a lens unit 41, an LED 42, and a PD 43. Further, in the present embodiment, the second sensor 40 includes an ECU 44 and a second substrate 45. As shown in FIG. 2, the LED 42, the PD 43, and the ECU 44 are mounted on the surface of the second substrate 45 on the windshield 100 side. The LED 42 corresponds to a “light emitting element” recited in the claims, and the PD 43 corresponds to a “light receiving element”.

  In the lens unit 41, the lens unit lower surface 41 a is disposed in contact with the light transmission unit 21. That is, the lens portion lower surface 41a and the surface of the first substrate 34 on the windshield 100 side are substantially flush with each other. The second substrate 45 is disposed on the opposite side of the windshield 100 with respect to the lens unit 41 and is spaced apart from the lens unit 41. In other words, the second substrate 45 is disposed farther than the first substrate 34 with respect to the contact member 20.

  The LED 42 emits reference light in the direction of the windshield 100. The reference light is, for example, infrared. The irradiated reference light is incident on the incident surface 41b among the surfaces of the lens unit 41 opposite to the lens unit lower surface 41a. Then, the reference light is refracted to become parallel light and is emitted from the lens unit lower surface 41a. The reference light emitted from the lens unit lower surface 41a passes through the light transmission unit 21 and is reflected by the windshield outer surface 100a.

  The reference light reflected by the windshield outer surface 100a is transmitted again through the light transmitting portion 21 and enters the lens unit lower surface 41a. From the surface of the lens unit 41 opposite to the lens unit lower surface 41a, from the lens unit emission surface 41c. It is injected. The reference light is refracted so as to be condensed toward the PD 43 and received by the PD 43.

  The PD 43 outputs a signal corresponding to the intensity of the received reference light to the ECU 44. When raindrops are attached to the windshield outer surface 100a, the intensity of the reference light reflected by the windshield outer surface 100a is lower than when no raindrops are attached. Therefore, the ECU 44 detects raindrops attached to the windshield outer surface 100a based on the output signal of the PD 43. The ECU 44 outputs a detection signal to the outside via the connector 50 when it detects adhesion of raindrops on the windshield outer surface 100a. Accordingly, the wiper can be operated so that water droplets adhering to the windshield outer surface 100a are removed.

  Next, the connector 50 and the housing 60 will be described.

  The connector 50 is molded integrally with the housing 60 or attached to the housing 60. In the present embodiment, the connector 50 is attached to the housing 60. A part of the connector 50 is accommodated in the housing 60, and the terminal 50 a of the connector 50 is electrically connected to the second substrate 45. Therefore, the ECU 44 can output a signal to the outside via the terminal 50a.

  The housing 60 has a housing side wall 60a. One side of the housing 60 is open, and the first sensor 30, the second sensor 40, and a part of the connector 50 are accommodated therein. That is, the first substrate 34, the second substrate 35, and the lens portion 41 are also accommodated. The lens portion lower surface 41a, the first surface of the first substrate 34, and the inner surface temperature detection element 31 face the outside from the opening of the housing 60.

  The housing side wall 60 a is located at a position separating the first sensor 30 and the second sensor 40. A terminal 60b that electrically connects the first substrate 34 and the second substrate 45 is inserted into the housing side wall 60a.

  Next, the effect of the integrated sensor device 10 described above will be described.

  In the present embodiment, the light transmitting portion 21 and the high heat transfer portion 22 are realized in the common contact member 20. According to this, when the light transmission part 21 is placed in contact with the lens part 41 at a correct position, a two-dimensional position in the entire contact member 20 is determined. Therefore, the high heat transfer portion 22 does not come into direct contact with the lens portion 41. Thereby, it is possible to suppress the heat generated by the second sensor 40 from being transmitted directly from the lens part 41 to the high heat transfer part 22 and being transmitted to the inner surface temperature detection element 31. Therefore, the inner surface temperature detecting element 31 can detect the accurate temperature of the windshield inner surface 100b.

  The heat generated by the second sensor 40 includes the heat of the lens unit 41 due to the emission of the reference light emitted from the LED 42 and received by the PD 43 in addition to the heat generated by the LED 42, the PD 43, and the ECU 44.

  In addition, since the light transmission part 21 and the high heat transfer part 22 are realized in the common contact member 20, the light transmission part 21 is disposed in contact with the lens part 41, and the high heat transfer part 22 is arranged on the inner surface temperature detection element 31. Can be placed in contact with each other. Therefore, the assembly man-hour can be reduced as compared with the conventional art.

(Second Embodiment)
In the present embodiment, description of portions common to the integrated sensor device 10 shown in the above embodiment is omitted.

  As shown in FIGS. 3 and 4, the contact member 20 of the integrated sensor device 10 according to the present embodiment has a notch portion 23 that suppresses heat transfer from the light transmitting portion 21 to the high heat transfer portion 22. In FIG. 3, the inner surface temperature detection element 31 and the lens unit 41 are indicated by broken lines as a reference for the position.

  In the contact member 20, the notch portion 23 is formed between a portion facing the inner surface temperature detection element 31 and a portion facing the lens portion 41. In the present embodiment, as shown in FIG. 4, the notch portion 23 is provided between the light transmission portion 21 and the high heat transfer portion 22. Further, the notch 23 is provided on at least one of the one surface 20a and the back surface 20b of the contact member 20. In this embodiment, as shown in FIG. 4, the notch part 23 is formed in the back surface 20b. Moreover, the cross-sectional shape orthogonal to the extending direction of the notch 23 is substantially triangular.

  Here, the heat generated by the second sensor 40 is transferred in the order of the lens portion 41, the light transmission portion 21, the high heat transfer portion 22, and the inner surface temperature detection element 31. In the contact member 20, the smaller the thermal resistance between the portion facing the lens portion 41 and the portion facing the inner surface temperature detection element 31, the more heat is transferred to the inner surface temperature detection element 31.

  On the other hand, the notch 23 has a thermal insulation effect due to its own air layer, and therefore has a lower thermal conductivity than the other parts of the contact member 20. As described above, when the notch portion 23 is provided, the heat transfer path in the contact member 20 becomes narrow. Therefore, heat transfer from the lens unit 41 to the inner surface temperature detection element 31 can be suppressed. That is, the inner surface temperature detection element 31 can detect a more accurate temperature.

  As described above, in the contact member 20, the smaller the thermal resistance between the portion facing the lens portion 41 and the portion facing the inner surface temperature detection element 31, the more heat is transferred to the inner surface temperature detection element 31. That is, in the direction perpendicular to both surfaces 20a and 20b of the contact member 20, that is, in the depth direction, the heat transfer amount from the second sensor 40 to the inner surface temperature detection element 31 increases as the distance from the back surface 20b increases.

  On the other hand, in this embodiment, the notch part 23 is formed in the back surface 20b side. The notch 23 has a heat insulating effect as described above. Therefore, heat is transferred around the notch 23, and the heat transfer path becomes longer compared to the configuration in which the notch 23 is not provided on the back surface 20b. That is, since the thermal resistance is increased, heat transfer from the second sensor 40 to the inner surface temperature detection element 31 can be more effectively suppressed.

  Further, in the contact member 20, since the distance between the light transmission part 21 and the high heat transfer part 22 is short, as described above, it is a part that transfers a large amount of heat to the inner surface temperature detection element 31. Therefore, in the contact member 20, by forming the notch portion 23 between the light transmission portion 21 and the high heat transfer portion 22, heat transfer from the lens portion 41 to the inner surface temperature detection element 31 can be suppressed. it can. That is, the inner surface temperature detection element 31 can detect a more accurate temperature.

  Moreover, in this embodiment, as shown in FIG. 3, the notch part 23 is one side of the long side of the contact member 20, ie, one end 20c, with respect to the planar rectangular contact member 20, and the other end opposite to the one end 20c. 20d, that is, formed across the other of the long sides. According to this, since the heat transfer path from the lens part 41 to the inner surface temperature detection element 31 always passes through the portion narrowed by the notch part 23, heat transfer from the light transmitting part 21 to the high heat transfer part 22 is achieved. It is suppressed. Therefore, the inner surface temperature detecting element 31 can detect a more accurate temperature.

  In addition, since the heat transfer path to the inner surface temperature detection element 31 becomes narrower as the depth of the notch 23 becomes deeper, heat transfer from the lens portion 41 to the inner surface temperature detection element 31 can be suppressed.

(Third embodiment)
In the present embodiment, description of portions common to the integrated sensor device 10 shown in the above embodiment is omitted.

  As shown in FIG. 5 and FIG. 6, the contact member 20 of the integrated sensor device 10 according to the present embodiment is provided between the light transmission part 21 and the high heat transfer part 22, and is more thermally conductive than the light transmission part 21. Has a low low heat transfer section 24. In FIG. 5, the inner surface temperature detecting element 31 and the lens unit 41 are indicated by broken lines as a reference for the position.

  As shown in FIG. 6, in the present embodiment, a groove having a predetermined depth is formed on the silicon sheet from the back surface 20 b side of the contact member 20. The low heat transfer portion 24 includes a lid portion 24a that covers the groove, a gap portion 24b that is a portion where the groove is covered with the lid portion 24a and air remains in the groove, and a bottom portion 24c that corresponds to the bottom of the groove. And having. The lid portion 24a is formed using the same material as the silicon sheet. Thus, the low heat transfer part 24 has the gap part 24b, and since the gap part 24b has a heat insulating effect, it is a part having lower thermal conductivity than the light transmission part 21.

  In the contact member 20, the portion between the light transmitting portion 21 and the high heat transfer portion 22 is a portion that conducts a large amount of heat to the inner surface temperature detection element 31 as described above. Therefore, in the contact member 20, the heat from the lens portion 41 to the inner surface temperature detection element 31 is formed by forming the low heat transfer portion 24 having low thermal conductivity between the light transmission portion 21 and the high heat transfer portion 22. Can be suppressed. That is, the inner surface temperature detection element 31 can detect a more accurate temperature.

  In the present embodiment, as shown in FIG. 5, the low heat transfer portion 24 is configured so that the low-temperature heat transfer portion 24 is one end of the long side of the contact member 20, that is, one end 20 c and the other end 20 d opposite to the one end 20 c. That is, it is formed across the other of the long sides. According to this, in the heat transfer from the lens part 41 to the inner surface temperature detection element 31, the heat transfer path always passes through the low heat transfer part 24, so that the heat transfer from the light transmitting part 21 to the high heat transfer part 22 is suppressed. Is done. Therefore, the inner surface temperature detecting element 31 can detect a more accurate temperature.

  In the present embodiment, the low heat transfer portion 24 having the gap portion 24b is employed. Gases have higher heat insulation than liquids and solids. According to this, heat transfer from the light transmission part 21 to the high heat transfer part 22 can be more effectively suppressed due to the heat insulation of air. Therefore, the inner surface temperature detecting element 31 can detect a more accurate temperature. In particular, heat transfer from the lens part 41 to the inner surface temperature detection element 31 can be suppressed as the height of the gap 24b is higher.

  Further, the gap 24b is not closed on the back surface 20b. It is closed by the lid 24a. Therefore, at the time of bonding or after bonding, the air in the gap portion 24b moves to the interface between the light transmission portion 21 and the second sensor 40 or the interface between the high heat transfer portion 22 and the first sensor 30, and Generation of bubbles at the interface can be suppressed.

  Further, on the back surface 20 b of the contact member 20, the lid portion 24 a is substantially flush with the light transmitting portion 21 and the high heat transfer portion 22. Therefore, it is possible to suppress the generation of bubbles at the interface between the light transmission part 21 and the second sensor 40 and the interface between the high heat transfer part 22 and the first sensor 30 at the time of bonding. The interface between the light transmission part 21 and the second sensor 40 is an interface between the light transmission part 21 and the lens part 41. The interface between the high heat transfer unit 22 and the first sensor 30 is an interface between the high heat transfer unit 22, the inner surface temperature detection element 31, and the first substrate 34.

  If bubbles are generated at the interface between the contact member 20 and the lens portion lower surface 41a, the bubbles cause reflection and scattering of the reference light, which causes an error in the reference light detection of the PD 43. In the present embodiment, as described above, it is possible to suppress the generation of bubbles at the interface between the light transmission part 21 and the lens part lower surface 41a. Therefore, the PD 43 can receive the reference light having a more accurate intensity. That is, the ECU 44 can more accurately detect raindrops attached to the windshield outer surface 100a.

  Further, when bubbles are generated at the interface between the high heat transfer section 22 and the first substrate 34 and the interface between the high heat transfer section 22 and the inner surface temperature detecting element 31, the bubbles have a heat insulating effect, and the wind shield 100 Heat transfer to the temperature detection element 31 is suppressed. As a result, an error occurs in the detection of the inner surface temperature detection element 31. In the present embodiment, it is possible to suppress the generation of bubbles at the interface between the high heat transfer unit 22 and the first substrate 34 and the interface between the high heat transfer unit 22 and the inner surface temperature detection element 31. Therefore, the inner surface temperature detecting element 31 can detect a more accurate temperature.

(Fourth embodiment)
In the present embodiment, description of portions common to the integrated sensor device 10 shown in the above embodiment is omitted. 7A to 7C showing the method for manufacturing the integrated sensor device 10, in FIGS. 7B and 7C, a part of the integrated sensor device 10 is omitted for convenience. Yes.

  In the present embodiment, the integrated sensor device 10 having the structure shown in FIG. 8 is formed using the manufacturing method shown in FIGS.

  First, the preparation process shown in FIG.

  In this preparation step, the contact member 20 having the cuts 25a to 25d is prepared. In the present embodiment, the cuts 25 a and 25 c are formed at portions of the light transmission portion 21 that face each other. In addition, the cuts 25b and 25d are formed at portions of the high heat transfer section 22 that face each other. That is, the cuts 25a and 25c and the cuts 25b and 25d are formed on both sides in the vicinity of the boundary so that the boundary between the light transmission part 21 and the high heat transfer part 22 is sandwiched therebetween. In addition, each of the cuts 25a to 25d straddles one of the long sides of the contact member 20, that is, one end 20c, to the other end 20d opposite to the one end 20c, that is, the other of the long sides. To form.

  Moreover, as shown to Fig.7 (a), let the cross-sectional shape orthogonal to the extending direction of each notch 25a-25d be a substantially triangle. The depths of the notches 25a to 25d are set so as not to contact each other.

  When the preparation process is completed, a bonding process shown in FIG.

  In this bonding step, on the back surface 20b of the contact member 20, the first sensor 30 and the inner surface temperature detection element 31 are in contact with the light transmission portion 21 while the lens portion lower surface 41a is in contact with the high heat transfer portion 22. The second sensor 40 and the contact member 20 are bonded together.

  In the present embodiment, the first sensor 30 and the second sensor 22 are arranged such that the high heat transfer unit 22 faces the inner surface temperature detection element 31 and the first substrate 34 and the light transmission unit 21 faces the lens unit lower surface 41a. The sensor 40 and the contact member 20 are bonded together.

  When the bonding process is completed, a dividing process shown in FIG.

  In this dividing step, portions of the contact member 20 that are sandwiched between the cuts 25a to 25d are removed. Since the cuts 25a and 25c and the cuts 25b and 25d are formed across the boundary between the light transmission part 21 and the high heat transfer part 22, the contact member 20 is made to transmit light by removing the part between the cuts 25a to 25d. It can be divided into a part 21 and a high heat transfer part 22. Through the above steps, the integrated sensor device 10 shown in FIG. 8 is formed.

  In the present embodiment, the contact member 20 is divided into a light transmission part 21 and a high heat transfer part 22, and an air layer is provided between the light transmission part 21 and the high heat transfer part 22. Therefore, the heat generated by the second sensor 40 and transmitted to the light transmission part 21 can be more effectively suppressed from being transmitted from the light transmission part 21 to the high heat transfer part 22. Thereby, the inner surface temperature detection element 31 can detect the more accurate temperature of the windshield inner surface 100b.

  Moreover, since the light transmission part 21 and the high heat transfer part 22 are comprised in the one contact member 20 at the time of bonding, the light transmission part 21 and the high heat transfer part 22 are bonded together at the same process. Can do. And since it divides | segments after a bonding process, it is not necessary to position with respect to each of the lens part 41 and the inner surface temperature detection element 31, and an assembly man-hour can be reduced compared with the past.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the above embodiment, the light emitting element is the LED 42 and the light receiving element is the PD 43. However, the present invention is not limited to this.

  Although an example in which the in-vehicle humidity detection element 32 and the in-vehicle temperature detection element 33 are mounted on the first substrate 34 has been shown, they may be mounted on the second substrate 45.

  The shapes of the notch 23 and the cuts 25a to 25d are not limited to the above examples.

  Moreover, although the example in which the notch 23 is formed only on the back surface 20b of the contact member 20 has been shown, it may be formed only on the one surface 20a. According to this, the notch part 23 is not formed in the back surface 20b. Therefore, at the time of bonding or after bonding, the air in the cutout portion 23 moves to the interface between the light transmission portion 21 and the second sensor 40 or the interface between the high heat transfer portion 22 and the first sensor 30. It is possible to suppress the generation of bubbles at the interface. Moreover, the back surface 20b is flat. Therefore, it is possible to suppress the generation of bubbles at the interface between the light transmission part 21 and the second sensor 40 and the interface between the high heat transfer part 22 and the first sensor 30 at the time of bonding.

  According to this, the inner surface temperature detecting element 31 detects a more accurate temperature by suppressing the generation of bubbles at the interface between the high heat transfer section 22 and the inner surface temperature detecting element 31 and the first substrate 34. Can do. Further, by suppressing the generation of air bubbles at the interface between the light transmission part 21 and the lens part lower surface 41a, the ECU 44 can more accurately detect raindrops attached to the windshield outer surface 100a.

  Moreover, the notch part 23 may be formed in both surfaces 20a and 20b. In that case, the heat transfer path from the second sensor 40 to the inner surface temperature detection element 31 can be further narrowed by forming the notches 23 of the both surfaces 20a and 20b so as to face each other. In addition, the depth of the notch part 23 formed in both surfaces 20a and 20b shall be the depth which does not contact mutually.

  Moreover, although the notch part 23 and the notches 25a-25d showed the example formed ranging over the other end 20d opposite to one end from the one end 20c of the contact member 20, it is not limited to this. About the notch part 23, what is necessary is just to provide so that the transmission of the heat from the light transmissive part 21 to the high heat-transfer part 22 may be suppressed.

  In the said Example, although the low heat-transfer part 24 showed the example which has the cover part 24a, the space | gap part 24b, and the bottom part 24c, it is not limited to this. The low heat transfer part 24 can be adopted as long as it is formed of a material having lower heat transfer than the light transmission part 21.

DESCRIPTION OF SYMBOLS 10 ... Integrated sensor apparatus, 20 ... Contact member, 20a ... One side, 20b ... Back side, 21 ... Light transmission part, 22 ... High heat-transfer part, 23 ... Notch , 24 ... low heat transfer part, 24 a ... lid part, 24 b ... gap part, 24 c ... bottom part, 25 a to d ... notch, 30 ... first sensor, 31 ... Inner surface temperature detection element, 32 ... In-vehicle humidity detection element, 33 ... In-vehicle temperature detection element, 34 ... First substrate, 40 ... Second sensor, 41 ... Lens part, 41a ... -Lower surface, 41b ... Incident surface, 41c ... Outgoing surface, 42 ... LED, 43 ... PD, 44 ... ECU, 45 ... Second substrate, 50 ... Connector, 50a ... Terminal, 60 ... Housing, 60a ... Housing side wall, 60b ... Terminal, 100 ... Windshield, 100a ··· outer surface, 100b ··· inner surface

Claims (14)

An integrated sensor device disposed on an inner surface (100b) of a windshield (100) of a vehicle,
A contact member (20) having one surface (20a) and a back surface (20b) opposite to the one surface, wherein the one surface is in contact with the inner surface of the windshield;
A first sensor (30) disposed in contact with the back surface of the contact member and having an inner surface temperature detection element (31) for detecting the temperature of the inner surface of the windshield via the contact member;
A lens portion (41) disposed in contact with a portion different from the first sensor on the back surface of the contact member; and a light emitting element (42) for irradiating the windshield with reference light through the lens portion; A second sensor (40) for detecting raindrops on the outer surface (100a) of the windshield, the light receiving element (43) receiving the reference light reflected by the windshield through the lens unit; And comprising
The contact member is provided so as to face the lens unit, and transmits the reference light and the reflected reference light. The light transmission part (21) and a portion excluding the light transmission part, and at least the inner surface An integrated sensor device comprising: a high heat transfer portion (22) provided to face the temperature detection element and having higher thermal conductivity than the light transmission portion.   2. The integrated sensor device according to claim 1, wherein the contact member has a cutout portion (23) for suppressing heat transfer from the light transmission portion to the high heat transfer portion.   3. The integrated sensor device according to claim 2, wherein the notch portion is formed between a portion facing the inner surface temperature detection element and a portion facing the lens portion in the contact member. .   The integrated sensor device according to claim 3, wherein the notch is formed so as to straddle from one end (20 c) of the contact member to the other end (20 d) opposite to the one end.   The said contact member is provided between the said light transmissive part and the said high heat-transfer part, and has a low heat-transfer part (24) whose heat conductivity is lower than the said light transmissive part. The integrated sensor device according to 1. The contact member has a silicon sheet,
The integrated sensor device according to any one of claims 1 to 5, wherein the high heat transfer section is formed by adding a metal filler to the silicon sheet.   The first sensor further includes an in-vehicle humidity detecting element (32) for detecting an internal humidity in the vehicle, and an in-vehicle temperature detecting element (33) for detecting an internal temperature in the vehicle, and the windshield The integrated sensor device according to claim 1, wherein the humidity of the inner surface of the sensor is detected. A contact member (20) having one surface (20a) in contact with the inner surface (100b) of the windshield (100) of the vehicle, and an inner surface temperature detecting element (detecting the temperature of the inner surface of the windshield via the contact member) 31) and a lens portion (41) disposed in contact with the back surface (20b) opposite to the one surface of the contact member, and a reference light is transmitted to the windshield via the lens portion. A second sensor (40) that receives the reference light reflected by the windshield via the lens unit, and a manufacturing method of an integrated sensor device (10),
A light transmission part (21) provided opposite to the lens part and transmitting the reference light and the reflected reference light, and a part excluding the light transmission part, at least facing the inner surface temperature detection element And a high heat transfer portion (22) having a higher thermal conductivity than the light transmission portion, and a notch (25a to 25a) between the light transmission portion and the high heat transfer portion. A preparation step of preparing the contact member to have 25d);
In the back surface of the prepared contact member, the first sensor, the second sensor, and the second sensor are arranged so that the lens unit is in contact with the light transmission unit and the inner surface temperature detection element is in contact with the high heat transfer unit. A bonding step of bonding the contact member;
An integrated sensor comprising: a splitting step of removing the cut portion of the contact member after the bonding step and dividing the contact member into the light transmitting portion and the high heat transfer portion. Device manufacturing method. One surface (20a) and a back surface (20b) opposite to the one surface, the one surface being disposed in contact with an inner surface (100b) of a windshield (100) of a vehicle, and the rear surface being a temperature of the inner surface of the windshield The window shield is irradiated with reference light via the inner surface temperature detecting element of the first sensor (30) having the inner surface temperature detecting element (31) for detecting the light and the lens part (41), and the wind shield A contact member disposed in contact with the lens portion of the second sensor (40) that receives the reflected reference light through the lens portion;
A light transmission part (21) provided so as to face the lens part and transmitting the reference light and the reflected reference light;
A contact member, comprising: a high heat transfer portion (22) provided to face the inner surface temperature detection element and having a heat transfer property higher than that of the light transmission portion.   The contact member according to claim 9, further comprising a notch portion (23) for suppressing heat transfer from the light transmission portion to the high heat transfer portion.   The contact member according to claim 10, wherein the notch is formed between a portion facing the inner surface temperature detection element and a portion facing the lens portion.   The contact member according to claim 11, wherein the cutout portion is formed to extend from one end (20 c) to the other end (20 d) opposite to the one end.   The contact member according to claim 12, further comprising a low heat transfer portion (24) provided between the light transmission portion and the high heat transfer portion and having lower thermal conductivity than the light transmission portion. . With a silicon sheet,
The contact member according to claim 9, wherein the high heat transfer portion is formed by adding a metal filler to the silicon sheet.

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