JP7164866B2 - Steering wheel integrated with capacitance sensor and capacitance sensor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitance sensor suitable for use in a steering wheel, and a steering wheel integrated with a capacitance sensor including the capacitance sensor.

2. Description of the Related Art A steering wheel of a vehicle is a vehicle component that is indispensable for driving a vehicle, and is operated by a driver by firmly gripping the steering wheel during driving. Therefore, from the viewpoint of improving driving safety, there is known a technique in which a pressure sensor is provided on the steering wheel in order to detect in detail the state of the driver's grip on the steering wheel. Such technology is described, for example, in Japanese Patent Application Laid-Open No. 2014-190712 (Patent Document 1).

JP 2014-190712 A

However, in recent years, the way the steering wheel is handled has changed due to the development of autonomous driving technology, and the number of situations where the driver only needs to put his hand on the steering wheel has increased. There is an increasing demand for

In response to such demands, a capacitance sensor with electrodes arranged on a film is known for use in detecting contact or non-contact with an object. In view of this, it is difficult to apply a planar capacitive sensor. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a capacitance sensor that can be easily applied to a steering wheel.

In order to achieve the above objects, the present invention is configured as follows. That is, the present invention is a capacitance sensor having a conductive molded body shaped along the longitudinal direction of a rim of a steering wheel, and a film circuit board shaped along the spokes of the steering wheel.

The capacitance sensor of the present invention has a conductive molded body shaped along the longitudinal direction of the rim portion of the steering wheel and a film circuit board shaped along the spoke portion of the steering wheel. Hand contact or non-contact can be detected as a change in capacitance. Therefore, it is possible to make use such as issuing a warning when the rim portion is not touched by a human hand during automatic driving or the like.

In the present invention, the conductive molded body can be configured to have a length that is part of the length of the rim portion in the longitudinal direction. Since the conductive molded body has a length that is part of the length of the rim portion in the longitudinal direction, it is possible to detect human contact or non-contact with the portion of the rim portion where the conductive molded body is formed. can be done.

In the present invention, the conductive molded body can be configured to cover the core forming the rim portion. The electrically conductive molded body covers the core forming the rim portion, so that it can be incorporated as part of the steering wheel. In addition, the act of gripping and releasing the rim portion with a human hand can directly cause a change in the distance between the conductive molding and the human hand, and the contact or non-contact of the human hand with the rim portion. Contact can be reliably detected.

According to the present invention, the film circuit board is formed in a flat plate shape and has no curved surface other than a curved surface having a Gaussian curvature of substantially zero. Since the film circuit board is formed in a flat plate shape and has no curved surface other than a curved surface having a Gaussian curvature of substantially 0, the capacitance sensor can be arranged in the steering wheel without causing distortion in the film circuit board. be able to. Therefore, the capacitive sensor can be easily accommodated in the steering wheel.

The present invention can be configured such that the circuit wiring of the film circuit board and the conductive molding are conductively connected through molded body connection ends provided on the circuit wiring. In the capacitance sensor, since the circuit wiring of the film circuit board and the conductive molded body are conductively connected through the molded body connection end provided on the circuit wiring, the film circuit is connected to the conductive molded body having a curved surface. It is possible to reliably conduct with the circuit wiring of the substrate.

Further, the present invention relates to a steering wheel integrated with a capacitance sensor, which includes a capacitance sensor for detecting contact or non-contact of an operator with a rim portion of the steering wheel, wherein the capacitance sensor is arranged in the longitudinal direction of the rim portion. and a conductive molded body that covers the core provided in the rim portion along the rim, and a film circuit board that extends along the spoke portion of the steering wheel and intersects the conductive molded body. Body type steering wheel.

The present invention relates to a steering wheel integrated with a capacitance sensor that detects contact or non-contact of an operator with respect to the rim of the steering wheel, wherein the capacitance sensor extends in the longitudinal direction of the rim. and a film circuit board along the spoke portion of the steering wheel and intersecting the conductive molded body. It can be placed in the steering wheel without forcibly deforming the circuit board. Therefore, it is easy to attach the capacitance sensor to the steering wheel.

In the present invention, the conductive molded body is formed as a plurality of mutually insulated conductive molded bodies obtained by dividing the entire length in the longitudinal direction of the rim portion, and the plurality of electrostatic discharge electrodes formed for each of the conductive molded bodies is formed. It can be configured with a capacitive sensor. In the steering wheel integrated with the capacitance sensor, the conductive molded body is formed as a plurality of mutually insulated conductive molded bodies obtained by dividing the entire length of the rim portion in the longitudinal direction. Since it has a plurality of the capacitance sensors, it is possible to arrange another capacitance sensor for each desired location of the rim portion, and to detect contact or non-contact of a human hand at this desired location. can be done.

The present invention can have a left capacitance sensor and a right capacitance sensor when the rim portion is divided into left and right halves. Since the steering wheel integrated with the capacitance sensor has the left side capacitance sensor and the right side capacitance sensor when the rim portion is divided into left and right, the left side and the right side of the rim portion are independent of each other, Human hand contact or non-contact can be detected.

The present invention can have a front-side capacitance sensor and a rear-side capacitance sensor when the rim portion is divided into two front and rear portions. Since the steering wheel integrated with the capacitance sensor has the front side capacitance sensor and the rear side capacitance sensor when the rim portion is divided into the front and rear sides, the front side and the rear side of the rim portion are independent of each other. can detect contact or non-contact of a human hand.

According to the capacitance sensor and the capacitance sensor integrated steering wheel of the present invention, it is possible to detect contact or non-contact of the human hand with the rim portion of the steering wheel.

1 is a plan view of a steering wheel provided with the capacitance sensor of the first embodiment; FIG. Fig. 2(a) is a cross-sectional view along the line IIa-IIa of Fig. 1; Fig. 2(b) is a cross-sectional view along the line IIb-IIb of Fig. 1; is. 2 is a plan view of the capacitive sensor of FIG. 1; FIG. FIG. 4 is a plan view corresponding to FIG. 3 of the capacitance sensor of modification 1-1; FIG. 4 is a plan view corresponding to FIG. 3 of the capacitance sensor of modification 1-2; FIG. 4 is a plan view corresponding to FIG. 3 of the capacitance sensor of modification 1-3; FIG. 4 is a plan view corresponding to FIG. 3 of the capacitance sensor of modification 1-4; FIG. 2B is a cross-sectional view corresponding to FIG. 2(a) of the capacitance sensor of Modified Example 1-5; FIG. 2B is a cross-sectional view of the capacitance sensor of the second embodiment, corresponding to FIG. 2(a); FIG. 10 is a cross-sectional view corresponding to FIG. 2(a) of the capacitance sensor of modification 2-1; FIG. 10 is a cross-sectional view corresponding to FIG. 2(a) of the capacitance sensor of modification 2-2; FIG. 3 is a plan view equivalent to FIG. 3 of the capacitance sensor of the third embodiment;

The present invention will be described in further detail according to embodiments. Members common to each embodiment are denoted by the same reference numerals, and duplicate descriptions thereof are omitted. Duplicate explanations of common materials, actions, effects, etc. are also omitted.

<First Embodiment [Figs. 1 to 3]>: Fig. 1 is a schematic plan view of a steering wheel A to which a capacitive sensor 1 of this embodiment is mounted, and Fig. 2 is a partial sectional view thereof. 3 shows a plan view of the capacitance sensor 1. As shown in FIG. The steering wheel A has a rim portion R that is gripped and operated by hand, and spoke portions S that extend from the rim portion R toward the center of the circle. As shown in FIG. 2, the center of the rim portion R has a core C which is a hard core material. Both the rim portion R and the core C are formed in an endless annular shape, and more specifically, in an annular shape. In the capacitance sensor 1 of this embodiment, two capacitance sensors 1a and 1b are provided symmetrically on the right side and the left side in FIG. 1, respectively. When the capacitance sensors 1a and 1b are not distinguished from each other, either one of them or both of them will be collectively referred to as the capacitance sensor 1. FIG. One of these capacitive sensors 1, as shown in FIG.

The capacitive sensor 1 will be described in more detail based on its constituent elements. As shown in FIG. 2, the conductive molded body 12, which is a component of the capacitance sensor 1, is formed in a cylindrical shape so as to wrap the core C of the steering wheel A, and is made of a rubber-like elastic material with conductive filling. It is made of a dispersed material or a conductive polymer. Thermosetting rubbers such as silicone rubber, acrylonitrile butadiene rubber, chloroprene rubber, urethane rubber, butyl rubber, ethylene propylene rubber, natural rubber, butadiene rubber, styrene thermoplastic elastomer, ester thermoplastic elastomer, etc. , urethane-based thermoplastic elastomers, olefin-based thermoplastic elastomers, amide-based thermoplastic elastomers, butadiene-based thermoplastic elastomers, ethylene-vinyl acetate-based thermoplastic elastomers, and vinyl chloride-based thermoplastic elastomers. Silicone rubber is preferable because it has a small compression set and good temperature characteristics. Examples of the conductive filler include conductive carbon such as carbon black, graphite, graphite, graphene, carbon fiber, and carbon nanotube, or powders of metals or alloys such as silver, copper, nickel, aluminum, iron, and the like. . In addition, the conductive molded body 12 can be formed in a curved cylindrical shape along the core C as described above, and can also be formed in a straight cylindrical shape. When it has a straight cylindrical shape, it can be bent to cover the core.

The conductive molded body 12 made of such material preferably has a JIS-A hardness of 40-70, more preferably 50-60. Moreover, the volume resistivity of the conductive molded body 12 is preferably 1 to 50 Ω·cm. If it is less than 1 Ω·cm, the amount of the conductive filler compounded is large in order to lower the resistivity, and the conductive molded body 12 may become hard and brittle. On the other hand, if it exceeds 50 Ω·cm, the conductivity is too low and it is difficult to detect changes in capacitance.

As shown in FIG. 3, the film circuit board 13, which is another component of the capacitance sensor 1, is formed by forming circuit wiring 32 on a base film 31 and further forming a resist layer 33 on the surface thereof. is. Although the resist layer 33 shown in FIG. 3 is one size smaller than the base film 31 and is transparent, the resist layer 33 may be provided on the entire surface of the base film 31. It may be opaque.

The base film 31 is a flexible film-like material, and resin films such as polyamide, polyethylene terephthalate, polycarbonate, and polyimide can be used, and it is preferable to use a material with excellent moldability and heat resistance. In addition to these materials, elastic sheets made of synthetic rubber or thermoplastic elastomer, fabrics such as woven fabrics and non-woven fabrics, paper, and the like can also be used.

The circuit wiring 32 is a portion exhibiting high conductivity, and as shown in FIG. The molded body connection end 14 is a portion formed with a wide contact surface with the conductive molded body 12 at the end of the circuit wiring 32, and even if the circuit wiring 32 is covered with the resist layer 33, the conductive molded body 12 and are not covered with the resist layer 33 in order to ensure the electrical connection between them. Also, the molded body connection end 14 can be made of the same material as the material that can be used for the circuit wiring 32, which will be described later, or metal foil or the like. It should be noted that the molded body connection end 14 may not be provided if reliable and sufficient conduction between the circuit wiring 32 and the conductive molded body 12 can be ensured.

More specifically, the material of the circuit wiring 32 is formed by etching a metal foil such as copper into a wiring shape, or by printing a conductive paint containing metal powder such as silver or conductive carbon powder to form a wiring shape. and those formed in Particles of various shapes such as spherical, fibrous, needle-like, and scale-like can be used for the metal powder and carbon powder.

The resist layer 33 is a portion that protects the circuit wiring 32 from scratches, moisture, corrosive gas, etc., and is formed of, for example, a coating film formed of acrylic, urethane, or polyester materials, or various resin films. It can be a resist layer 33 .

The terminal portion 34 is a connector portion for electrically connecting the capacitance sensor 1 to other parts, and can be arranged on the central portion of the steering wheel A or the spoke portion S, and the circuit wiring 32 is electrically conductive. It can be formed by covering with a metal foil or carbon coating layer. The terminal portion 34 can be formed as a conductive surface that conducts to the conductive molded body 12 in addition to being used as a connector to other parts.

Such a film circuit board 13 is integrally formed with the conductive molded body 12 so as to be in contact with at least a portion of the conductive molded body 12 . In the capacitive sensor 1, as shown in FIG. 2, the film circuit board 13 extending from the surface of the spoke portion S to cover approximately 1/3 of the core material (core C) in the rim portion R is a conductive molded body. 12 is connected. The circuit wiring 32 on the film circuit board 13 is conductively connected to the conductive molded body 12 through the molded body connection end 14 . On the other hand, the opposite side of the film circuit board 13 extends through the spokes S to the central portion of the steering wheel A, and is connected to other electronic components through terminal portions 34 provided at the ends of the film circuit board 13 .

The integration of the film circuit board 13 and the conductive molded body 12 includes a method of insert-molding the film circuit board 13 into a molding die for the conductive molded body 12 . In order to improve the adhesion of the film circuit board 13 to the conductive molding 12, the film circuit board 13 may be coated with an adhesive or a primer, or subjected to surface treatment such as ultraviolet irradiation.

Such a capacitive sensor 1 is incorporated in the steering wheel A as described at the beginning, but the core C and the conductive molding 12 are preferably electrically insulated. Since the core C is made of iron, a metal such as aluminum, magnesium, zinc, or an alloy containing at least one of these metals, when the core C and the conductive compact 12 are in direct contact, the core C This is because current flows through Therefore, it is preferable to dispose an insulating film or an insulating layer made of silicone rubber, urethane-based elastomer, or the like on the outer surface of the core C or the inner surface of the conductive molded body 12 . In order to fix the conductive molding 12 to the core C, an adhesive, a pressure-sensitive adhesive, double-sided tape, or the like can be used. Alternatively, by stitching together the portions where the ends of the conductive molded body 12 are in contact with each other with a thread or the like, the wound state can be fixed.

The surface of the steering wheel A is covered with an outer skin E made of leather, urethane sheet, or the like, so that the steering wheel A provided with the capacitance sensor 1 can be obtained. Since the outer skin E covers the surface of the conductive molded body 12, it is preferable that it is insulative. This is because it is difficult to insulate adjacent capacitive sensors 1 if they are conductive. The thickness of the skin E is preferably 0.1 to 5 mm, more preferably 0.5 to 3 mm. If the thickness is less than 0.1 mm, peeling may occur. On the other hand, if it is thicker than 5 mm, the sensitivity of detection by the capacitance sensor 1 may deteriorate. In order to fix the outer skin E to the surface of the conductive molding 12, an adhesive, a double-sided tape, or the like can be used.

When the capacitive sensor 1 is fixed to the surface of the steering wheel A by stitching the ends of the outer skin E together, a projecting portion of the seam may be formed. By providing the molded body 12 with grooves, the seams can be accommodated in the grooves and the protrusion of the seams can be reduced.

According to the capacitance sensor 1, a control circuit (not shown) that connects the capacitance between the conductive molding 12 provided on the rim portion R and the driver's hand holding the rim portion R to the terminal portion 34 ), and the difference whether the rim portion R is gripped or not can be detected from the capacitance change.

<Modification 1-1 [FIG. 4]>: In the capacitive sensor 1 of the above embodiment, as shown in FIG. , the end of the film circuit board 13 is placed on the rim portion R, and the formed body connection end 14 is provided at the central portion of the conductive formed body 12 formed in a semicircular shape along the rim portion R. . On the other hand, in the capacitance sensor 1c shown as Modified Example 1-1, as shown in FIG. , and a molded body connection end 14 was provided at the end thereof. That is, the circuit wiring 32 and the conductive molded body 12 are electrically connected through the molded body connection ends 14 at the upper and lower end portions of the conductive molded body 12 formed in a semicircular shape along the rim portion R. The steering wheel A having such a capacitive sensor 1 can also detect whether the rim portion R is in contact or not with a human hand.

<Modification 1-2 [FIG. 5]>: In the capacitance sensor 1d of Modification 1-2, a molded body connection end 14a1 is provided at the central portion of the conductive molded body 12, and a circuit is electrically connected to the terminal portion 34. While the wiring 32a1 is provided, the two circuit wirings 32a2 and 32a3 which are electrically connected to the terminal portion 34 by providing the molded body connection ends 14a2 and 14a3 at both end portions of the conductive molded body 12 are provided separately from the previous circuit wiring 32a. are provided. These two circuit wirings 32a2 and 32a3 are also separate circuit wirings 32 that are not electrically connected to each other. The steering wheel A having such a capacitive sensor 1d can also detect whether the rim portion R is in contact or not with a human hand. By adopting such a mode, it becomes possible to detect which position of the steering wheel A the hand is in contact with by comparing the detected values of the capacitance between the molded body connection ends 14a1, 14a2, and 14a3. .

The capacitance sensor 1d of Modification 1-2 does not use part of the three circuit wirings 32, which are different circuit wirings 32a1, 32a2, and 32a3, for detecting changes in capacitance. It can also be used for heater applications. By using the circuit wirings 32a2 and 32a3 and applying a voltage across the long axis of the conductive molded body 12, the conductive molded body 12 between the molded body connection ends 14a2 and 14a3 can be heated.

<Modification 1-3 [FIG. 6]>: The steering wheel A to which the capacitance sensor 1 described as the first embodiment is attached is divided into left and right parts, and almost the entire left half of the rim part R is electrically conductive. The capacitance sensor 1a provided with the molded body 12 and the electrostatic capacity sensor 1b provided with the conductive molded body 12 on almost the entire right half of the rim portion R are provided. However, the number and arrangement of the conductive molded bodies 12 in the rim portion R can be changed, and the capacitive sensor 1 with such a changed conductive molded body 12 can be provided.

The capacitance sensor 1e shown in FIG. 6 is obtained by forming a conductive molded body 12 which is further divided into three on the left half of the rim portion R. As shown in FIG. These three conductive molded bodies 12, that is, the left middle conductive molded body 12a, the upper left conductive molded body 12b, and the left lower conductive molded body 12c are insulated from each other, and these conductive molded bodies are insulated from each other. By providing circuit wirings 32a, 32b, and 32c conducting to the bodies 12a, 12b, and 12c, respectively, it is possible to detect the presence or absence of contact or non-contact of a human hand for each of the three conductive molded bodies 12a, 12b, and 12c. can. It is preferable to fill the gap by arranging an insulating rubber-like elastic body between adjacent conductive moldings 12 .

The connection between the left middle conductive molded body 12a and the circuit wiring 32a in the capacitance sensor 1e is made through two molded body connection ends 14a1 and 14a2 provided at both ends of the left middle conductive molded body 12a. The upper left conductive molded body 12b and the circuit wiring 32b are connected through a molded body connection end 14b provided at the end of the upper left conductive molded body 12b, and the lower left conductive molded body 12c and the circuit wiring 32c are connected. is performed through a molded body connection end 14c provided at the end of the lower left conductive molded body 12c.

The middle left conductive molded body 12a, the upper left conductive molded body 12b, and the lower left conductive molded body 12c are names given for the purpose of distinguishing each other, and should not be limited to the positions indicated by the names. Therefore, although the conductive molded body 12 obtained by dividing the left half of the rim portion R into three equal parts is shown here, if the purpose is to detect the desired position of the rim portion R, that portion should be insulated from the other portions. It can be configured to provide a more conductive molding 12.

<Modification 1-4 [Fig. -3) is combined. Three circuit wirings 32a1, 32a2, and 32a3 that are insulated from each other are provided for one conductive molded body 12a as in the case of the capacitance sensor 1d, and three conductors that are insulated from each other are provided as in the case of the capacitance sensor 1e. There are formed bodies 12a, 12b and 12c. The steering wheel A having such a capacitive sensor 1f can also detect whether the rim portion R is in contact or not with a human hand. When a voltage is applied across the long axis of the conductive molded body 12a using the circuit wirings 32a2 and 32a3, the conductive molded body 12a between the molded body connecting ends 14a2 and 14a3 is heated and can be used as a heater.

<Modification 1-5 [FIG. 8]>: In the capacitance sensors 1a to 1b in the above example, the conductive molded body 12 is provided in a cylindrical shape so as to surround the entire circumference of the core C of the rim portion R. As described above, the conductive molding 12 can be formed vertically and horizontally in the cross-section of the rim R, such as by arranging the conductive molding 12 on the front, side, or rear of the rim R.

In the steering wheel A to which the capacitance sensors 1g and 1h shown in FIG. It has a capacitance sensor 1g having a film circuit board 13d, a rear conductive molded body 12e having the conductive molded body 12 arranged on the rear surface of the rim portion R, and a rear film circuit board 13e arranged on the rear surface of the spoke portion S. A capacitance sensor 1h is attached to the steering wheel A. These capacitance sensors 1g and 1h can detect whether or not the front surface and the rear surface of the rim portion R are in contact or not with the human hand.

<Second Embodiment [Fig. 9]>: Fig. 9 shows a cross-sectional view of a steering wheel A to which the capacitance sensor 2 of the present embodiment is mounted. The capacitive sensor 2 described in this embodiment is characterized in that the film circuit board 13 is formed integrally with the conductive molding 12 while remaining flat. Therefore, it is not necessary to deform the film circuit board 13 into a curved shape along the surface of the ring-shaped core C in the rim portion R. On the other hand, the capacitance sensor 2 is provided with a height adjustment portion 15 for adjusting the height between the surface of the core C and the core material D in the spoke portion S. The steering wheel A having such a capacitive sensor 2 can also detect whether the rim portion R is in contact or not with a human hand.

<Modification 2-1 [Fig. In addition, an insulating core covering portion 16 was provided between the core C and the conductive molded body 12 . With such a configuration, the film circuit board 13 can be formed into a flat plate shape that is not bent or deformed.

<Modification 2-2 [Fig. An insulating core covering portion 16 is provided between the core C and the conductive molded body 12 and a conductive ground layer 17 is provided on the inner surface side of the core covering portion 16 . A film circuit board 13 extends from the ground layer 17 . The presence of the ground layer 17 can block noise from the core C side.

<Third Embodiment [FIG. 12]>: FIG. 12 shows a plan view of the capacitance sensor 3 of the present embodiment. The capacitance sensor 3 is formed by forming a conductive molded body 12 into a thin layer such as a long flat plate shape. The capacitance sensor 3 can be easily attached to the steering wheel A by winding the thin-layer conductive molding 12 around the core C of the rim R. Since the conductive molded body 12 is a rubber-like elastic body with low hardness and good elongation, it can be easily wound around the rim portion R and fixed. The steering wheel A having such a capacitive sensor 3 can also detect whether the rim portion R is in contact or not with a human hand.

The above embodiments are examples of the present invention, and modifications of the embodiments, additions, combinations, etc. of known techniques can be performed without departing from the scope of the present invention, and such techniques are also within the scope of the present invention. It is included. For example, modifications such as combining the aspects shown as modifications 1-1 to 1-5 with the aspects shown as the second embodiment are possible.

In addition, since the conductive molded body 12 only needs to have conductivity in the longitudinal direction along the steering wheel A, an insulating rubber-like elastic body may be used instead of the conductive rubber-like elastic body as a whole. A part of the conductive molded body 12 can be made conductive, for example, by providing a coating film of a conductive paint on the surface of the body.

Various electronic components can be mounted on the film circuit board 13 . For example, a light-emitting element such as an LED, an input element such as a tact switch, an acoustic element such as a microphone or a speaker, other various sensors, and an imaging element may be used. The electronic components mounted on the film circuit board 13 can be embedded in the conductive molded body 12 or can be exposed through the conductive molded body 12 to form an integral structure.

Although the capacitance sensor 1 has been described as having a configuration in which the film circuit board 13 covers about 1/3 of the core C, the degree of coverage can be changed as appropriate. In the capacitance sensor 1, the film circuit board 13 may be integrally formed on the entire inner surface of the conductive molded body 12 so as to cover the entire circumference of the core C, or may be integrally formed on a part thereof. .

A heating element such as a heater can also be arranged in the capacitance sensor 1 . A heater portion that generates heat by arranging a heating wire can be provided in the conductive molded body 12 . The heater portion can be provided on the surface of the conductive molded body 12 or embedded in the conductive molded body 12 . In addition, it is preferable to have an electrically insulating insulating layer between the heater portion and the conductive molded body 12 so as not to interfere with the detection of the capacitance sensor 1 .

A steering wheel R rim portion C core S spoke portion D core material of spoke portion E outer cover 1, 1a to 1h, 2, 2b, 2c, 3 capacitance sensor 12 conductive molded body 12a middle left conductive molded body 12b upper left Conductive molded body 12c Lower left conductive molded body 12d Front conductive molded body 12e Rear conductive molded body 13 Film circuit board 13d Front film circuit board 13e Rear film circuit board 31 Base film 32, 32a1 to 32a3, 32a, 32b, 32c circuit wiring 33 resist layer 34 terminal portion 14, 14a1 to 14a3, 14a, 14b, 14c molded body connecting end 15 height adjusting portion 16 core covering portion 17 ground layer

Claims (9)

a conductive molded body shaped along the longitudinal direction of the rim of the steering wheel;
a film circuit board shaped along the spokes of the steering wheel,
The film circuit board is formed in a flat plate shape and has no curved surface other than a curved surface having a Gaussian curvature of substantially zero. a conductive molded body shaped along the longitudinal direction of the rim of the steering wheel;
a film circuit board shaped along the spokes of the steering wheel,
A capacitance sensor in which the circuit wiring of the film circuit board and the conductive molded body are conductively connected through a molded body connecting end provided on the circuit wiring. 3. The capacitance sensor according to claim 1, wherein the conductive molding has a length that is part of the length of the rim portion in the longitudinal direction. The capacitance sensor according to any one of claims 1 to 3, wherein the conductive molding covers a core forming the rim portion. A capacitance sensor integrated steering wheel equipped with a capacitance sensor that detects contact or non-contact of an operator with respect to the rim of the steering wheel,
The capacitance sensor includes a conductive molded body extending along the longitudinal direction of the rim portion and covering a core provided on the rim portion, and a film circuit board extending along the spoke portion of the steering wheel and intersecting the conductive molded body. , wherein the film circuit board has no curved surface other than a flat curved surface having a Gaussian curvature of substantially zero. A capacitance sensor integrated steering wheel equipped with a capacitance sensor that detects contact or non-contact of an operator with respect to the rim of the steering wheel,
The capacitance sensor includes a conductive molded body extending along the longitudinal direction of the rim portion and covering a core provided on the rim portion, and a film circuit board extending along the spoke portion of the steering wheel and intersecting the conductive molded body. , wherein the circuit wiring of the film circuit board and the conductive molded body are conductively connected through a molded body connecting end provided on the circuit wiring. The conductive molded body is formed as a plurality of mutually insulated conductive molded bodies obtained by dividing the entire length in the longitudinal direction of the rim portion, and a plurality of the capacitance sensors are formed for each of the conductive molded bodies. The steering wheel integrated with a capacitance sensor according to claim 5 or 6. The steering wheel integrated with a capacitance sensor according to any one of claims 5 to 7, further comprising a left capacitance sensor and a right capacitance sensor when the rim portion is divided into left and right halves. The steering wheel integrated with a capacitance sensor according to any one of claims 5 to 8, further comprising a front capacitance sensor and a rear capacitance sensor obtained by dividing the rim portion into two front and rear portions.

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