JP6309354B2 - Steering - Google Patents

Description

  The present invention relates to steering.

  Patent Document 1 below discloses a steering wheel in which a metal core is fixed to a steering shaft of a vehicle. The rim cored bar part of the cored bar is provided with a decorated part decorated as a wood grain by the main tree. A heater is provided inside the decorating portion, and the heater is configured to warm the decorating portion.

  By the way, the inner peripheral surface of the decoration part is made into a concave curved surface shape, and the sheet-like heater is affixed along this inner peripheral surface. However, if the distance between the decoration part and the heater varies, there is a possibility that the heat transmitted from the heater to the decoration part varies.

JP 2010-36840 A

  In view of the above facts, the present invention has an object to obtain a steering that can suppress variation in heat transmitted from a heating element to a decoration portion.

  The steering according to the first aspect of the present invention is provided on the inner peripheral side of the decorative portion, the cylindrical decorative portion in which the decorated decorative portion is assembled, and the occupant can grip the steering portion. The sheet-like heating body and a locking portion that is provided in a pair in the circumferential direction of the decoration portion and is locked in a state where the heating body is bent toward the decoration portion side.

  In the steering according to the first aspect, a tubular decorative portion that can be gripped by an occupant is provided. The decorating unit is configured by assembling decorated decorating parts. And a sheet-like heating body is provided in the inner peripheral side of a decoration part.

  Here, a pair of locking portions are provided in the decorative portion in the circumferential direction of the decorative portion, and the heating body is locked to the locking portion in a state bent to the decorative portion side. For this reason, the dispersion | variation in the distance of a decoration site | part and a heating body can be suppressed.

  In the steering according to the second aspect of the present invention, in the steering according to the first aspect, the locking portion protrudes from the edge of the decorative portion to the inner peripheral side and is disposed at a position where the decorative portion is assembled. Is done.

  According to the steering according to the second aspect, the locking portion is disposed at a position where the decorative portion is assembled, and the locking portion protrudes from the edge of the decorative portion toward the inner peripheral side. For this reason, the assembly area of a decoration part can be increased in the protrusion direction of a latching | locking part, and the thickness of the decoration part except a latching part is thickened for the increase in the assembly area of a decoration part. There is no need. Therefore, the thickness of the decoration part can be made thin and the thermal resistance of the decoration part can be reduced.

  In the steering according to the invention described in claim 3, in the steering according to claim 1 or claim 2, a plurality of decoration portions are provided, and the locking portion is part of the extending direction of the decoration portions. Provided.

  According to the steering according to the third aspect, the locking portion is provided in a part of the extending direction of the decorative portion. For this reason, since the latching | locking part is not provided in the other part of the extending direction of a decorating part, between the heating bodies each provided in the some decorating part connects in the other part of the extending direction of a decorating part It is possible.

  In the steering according to the invention described in claim 4, in the steering according to claim 2, the locking portion is provided in the entire extending direction of the decorative portion.

  According to the steering according to claim 4, since the locking portions are provided in the entire extending direction of the decorative part, the assembly area of the decorative part can be increased in the entire extending direction of the decorative part. it can. For this reason, since the thickness of the decoration part except a latching | locking part can be made still thinner, the thermal resistance of a decoration part can further be reduced.

  In the steering according to the fifth aspect of the present invention, in the steering according to any one of the first to fourth aspects, the heating body is bonded to the decorative portion via an adhesive.

  According to the steering according to the fifth aspect, since the heating body is bonded to the decoration part via the adhesive, the variation in the distance between the decoration part and the heating body can be further suppressed. In addition, since the air layer between the decoration part and the heating element is reduced, the thermal resistance from the heating element to the decoration part can be reduced.

  The steering which concerns on this invention has the outstanding effect that the dispersion | variation in the heat transmitted from a heating body to a decorating part can be suppressed.

It is the front view which looked at the steering wheel which concerns on 1st Embodiment of this invention from the passenger | crew of the seating state in the driver's seat of the vehicle. FIG. 2 is an exploded perspective view showing, in an enlarged manner, a portion surrounded by a dotted line B with a dashed line in the steering wheel shown in FIG. 1. FIG. 2 is a cross-sectional view of the steering wheel shown in FIG. 1 as viewed from the direction indicated by an arrow cut along the line AA. It is the principal part expanded sectional view which expanded the circumferential direction edge part of the decoration site | part in the steering wheel shown by FIG. It is a perspective view explaining the manufacturing method of the decoration part of the steering wheel which concerns on 1st Embodiment. It is sectional drawing corresponding to FIG. 3 explaining the manufacturing method of a decorating part. It is a perspective view of the decoration part of a decoration part in the steering wheel which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, the steering wheel according to the first embodiment of the present invention will be described with reference to FIGS.

(Overall configuration of steering wheel)
As shown in FIG. 1, a steering wheel 10 as a steering includes a cored bar 12. The cored bar 12 is formed, for example, by casting an alloy material. For example, an aluminum alloy material, a magnesium alloy material, or the like is used as the alloy material.

  The cored bar 12 has a boss 14 at the center. The boss portion 14 is fixed to a steering shaft 16 constituting a vehicle steering device (steering device). A rim cored bar portion 20 constituting a part of the cored bar 12 is provided around the bossed part 14 centered on the bossed section 14. The rim cored bar portion 20 is installed facing the driver's seat, and is formed in a substantially annular shape when an occupant seated in the driver's seat is viewed from the front. As shown in FIGS. 2 and 3, the cross-section of the rim cored bar 20 cut along the axial direction (steering axis direction) of the steering shaft 16 is bifurcated so as to be below the steering shaft (FIG. 3). In the middle, the direction of the arrow C is a C-shape opened to the side. In the present embodiment, an iron weight 22 constituting the metal core 12 is fitted into the rim metal core part 20. Although not shown, the weight 22 has a substantially annular shape when viewed from the front of the occupant.

  As shown in FIG. 1, a plurality of spoke portions 18 constituting the core metal 12 are provided between the boss portion 14 and the rim core metal portion 20. The spoke part 18 is configured to connect the boss part 14 and the rim core part 20, and the boss part 14, the spoke part 18 and the rim core part 20 are integrally formed. That is, when the rim core 20 is rotated about its rotational axis, the boss 14 is rotated via the spoke 18 and the steering shaft 16 fixed to the boss 14 is rotated about the steering axis.

  As shown in FIGS. 1 and 2, grips 24 that can be gripped by the occupant when operating the steering wheel 10 are provided on the left and right sides and the lower side of the steering wheel 10 as viewed from the front. In the present embodiment, the grip portion 24 covers the periphery of the portion on the rim core metal portion 20 side of each spoke portion 18 and the left and right sides and the lower portion of the rim core metal portion 20, so that each spoke portion 18. And attached to the rim cored bar 20. The grip portion 24 is formed of, for example, a leather material (outer leather material) that is not slippery during operation, has a good touch, and has a high-quality decoration and excellent decoration. As the leather material, either genuine leather or synthetic leather can be used. Although not shown, the end of the grip 24 in the axial direction (longitudinal direction) of the rim core 20 is bent toward the rim core 20. As shown in FIG. 2, the grip portion 24 includes a pair of first grip portion 24A and second grip portion 24B in the present embodiment. The first gripping portion 24 </ b> A is formed in a semi-cylindrical shape that covers a half of the circumference around the axial center of the rim cored bar 20. The second gripping portion 24 </ b> B is formed in a semi-cylindrical shape that covers the remaining half around the rim cored bar 20. The first gripping portion 24A and the second gripping portion 24B are sewn and assembled, and as a finished product, the gripping portion 24 is formed in a cylindrical shape that covers the entire periphery of the rim metal core portion 20.

  As shown in FIG. 2, a soft member 26 as a core material is provided inside the grip portion 24 on the rim core metal portion 20 side. As the soft member 26, a synthetic resin material that is softer than the rim core member 20 and a hard urethane resin material in the present embodiment are used. In other words, the soft member 26 is provided so as to cover the left and right sides and the lower side of the rim core member 20, and the grip portion 24 is provided so as to cover the periphery of the soft member 26.

  As shown in FIGS. 1 and 2, an intermediate member 30 is provided around the rim core metal part 20 in contact with the end of the soft member 26 in the axial direction of the rim core metal part 20. The intermediate member 30 has a width of several millimeters to several centimeters in the same direction as the axial direction of the rim core member 20, and the thickness from the rim core member 20 is substantially equal to the height of the outer peripheral surface of the soft member 26. It is made into an annular shape (ring shape) and is fitted into the rim cored bar 20. The intermediate member 30 is configured as a resin piece formed of, for example, a resin material. The intermediate member 30 is located at the end of the soft member 26 when the soft member 26 is formed on the rim core metal part 20, and suppresses the generation of burrs at the end of the soft member 26, and the soft member 26 with respect to the rim core metal part 20. The positioning is performed.

  As shown in FIG. 1, when viewed from the front, the occupant can grip the steering wheel 10 on the upper side of the steering wheel 10 where the grip portion 24 is not provided and the diagonally lower sides of the left and right sides when operating the steering wheel 10. The decoration part 40 decorated is provided. As shown in FIGS. 1 to 3, the decorative portion 40 is attached to the rim core metal portion 20 with a resin spacer 48 interposed therebetween, covering the periphery of the rim core metal portion 20. Since the spacer 48 is interposed, an air layer in which the reference numerals are omitted is formed between the decorative portion 40 excluding the spacer 48 and the rim core metal portion 20. The decorative portion 40 is made of, for example, wood (main tree) having a grain that is hard to slip during operation, feels good, and has a high-quality feeling and excellent decoration. Moreover, it may replace with wood and the resin material by which decorations, such as a woodgrain tone, a metal tone, and a carbon tone, were given to the surface at least may be sufficient.

  As shown in FIG. 2 and FIG. 3, the decoration unit 40 includes a pair of first decoration part 40A and second decoration part 40B in the present embodiment. The first decorative portion 40A is formed in a semi-cylindrical shape that covers about half of the periphery of the rim core metal part 20 around the axis core of the rim core metal part 20. The inner periphery 42A of the first decorative portion 40A on the rim cored bar 20 side has a concave curved surface shape that is recessed toward the outer periphery (not shown), and the inner periphery 42A is separated from the rim cored bar 20. The second decorative portion 40B is formed in a semi-cylindrical shape that covers the remaining half of the periphery of the rim core member 20. Similarly to the inner periphery 42A of the first decorative part 40A, the inner periphery 42B of the second decorative part 40B is formed in a concave curved surface shape and is separated from the rim metal core part 20. As shown in FIG. 3, the first decorating part 40 </ b> A and the second decorating part 40 </ b> B are assembled by being bonded by an adhesive 52 at both edges in the circumferential direction, and around the rim cored bar part 20. It is comprised by the cylinder shape which coat | covers the whole. As the adhesive 52, for example, a resin adhesive for woodworking is used.

  In the steering wheel 10 according to the present embodiment, as shown in FIGS. 2 and 3, the sheet-shaped first heating body (heater) 60 </ b> A is provided along the concave curved surface of the inner periphery 42 </ b> A of the first decorative portion 40 </ b> A. Is provided. Similarly, a sheet-like second heating body (heater) 60B is provided along the concave curved surface of the inner periphery 42B of the second decorative portion 40B. The first heating body 60A and the second heating body 60B are electrically connected in series or in parallel to form one heating body 60, and the heating body 60 is configured to warm the decorating unit 40. The heating body 60 is connected to the controller 70 shown in FIG. 1 through a harness (wiring) 78. A power source 72 and a switch 74 are connected to the controller 70. When the switch 74 is turned on, a current flows from the power source 72 to the harness 78 via the controller 70. As the power source 72, a battery mounted on the vehicle is used.

  The first heating body 60A of the heating body 60 will be described in detail. As shown in FIG. 2, the first heating body 60A is a sheet (film) 62, a heat wire 64 meandering around the surface of the sheet 62, and an end of the heat wire 64. And wiring for wiring 66 provided in the section. The sheet 62 is formed, for example, as a rectangular sheet having the same direction as the axial direction of the rim cored bar 20 as the longitudinal direction and the same direction as the circumferential direction of the rim cored bar 20 as the short direction. The sheet 62 is formed using, for example, a resin sheet or a rubber sheet as a base. In the present embodiment, the thickness of the sheet 62 is set to 0.1 mm to 0.5 mm. The heat wire 64 is a nichrome wire. Further, the connection wiring 66 is connected to the harness 78 described above. On the other hand, the second heating body 60B has the same configuration as the first heating body 60A.

  As shown in FIGS. 3 and 4, the first heating body 60 </ b> A is bonded to the inner periphery 42 </ b> A of the first decorative portion 40 </ b> A via an adhesive 50 </ b> A. More specifically, as shown in FIGS. 2 to 4, the engagement that is engaged with both ends 62 </ b> A in the circumferential direction of the sheet 62 of the first heating body 60 </ b> A at both circumferential edges of the first decorative portion 40 </ b> A. A locking portion 44B that is locked to the portion 44A and the other end 62B in the circumferential direction of the sheet 62 is provided. Here, the locking portion 44A and the locking portion 44B are formed integrally with the first decorative portion 40A and a pair, and both edges of the first decorative portion 40A serving as an assembly position with the second decorative portion 40B. It is formed as a protruding portion having a rectangular cross section protruding from the portion toward the rim cored bar 20 side (inner side). That is, in the first heating body 60A, one end 62A of the sheet 62 is locked by the locking portion 44A, the other end 62B of the sheet is locked by the locking portion 44B, and the inner peripheral surface 42A has a concave curved surface shape. In a state where the same curved surface shape is drawn and bent toward the first decorative portion 40A, it is adhered to the first decorative portion 40A. In the present embodiment, the locking portion 44A and the locking portion 44B are provided in the entire longitudinal direction of the first decorative portion 40A.

  As shown in FIG. 4, when the thickness of the sheet 62 is t1, and the thickness of the adhesive 50A is t2, the protrusion dimension d of the locking portion 44A exceeds the thickness t2 of the adhesive 50A and the rim. It is set within a range in which the separation distance l from the cored bar portion 20 can be secured. That is, the projecting dimension d is set within a range from a dimension in which the one end 62A (or the other end 62B) of the sheet 62 is hooked and locked to a dimension that does not contact the rim cored bar 20. In the present embodiment, 0.1 mm is required as the separation dimension l in consideration of the expansion and contraction of the first decorative portion 40A that accompanies changes in temperature and humidity. In this embodiment, when a chloroprene rubber-based resin adhesive is used as the adhesive 50A, the thickness t2 of the adhesive 50A is set to 0.05 mm to 0.20 mm, for example. Therefore, in the present embodiment, the protruding dimension d is set to 0.3 mm to 0.5 mm. In the present embodiment, the protruding dimension d is set to a dimension that is equal to or slightly larger than the dimension obtained by adding the thickness t1 of the sheet 62 and the thickness t2 of the adhesive 50A. In the present embodiment, the angle α formed by the side surface 44S of the locking portion 44A to which the one end 62A of the sheet 62 is locked and the inner periphery 42A is a right angle. The locking capability at the locking portion 44A may be further improved. The configuration of the locking portion 44B is the same as that of the locking portion 44A.

  Similar to the first heating body 60A, the second heating body 60B is bonded to the inner circumference 42B of the second decorative portion 40B via an adhesive 50B, as shown in FIG. As shown in FIG.2 and FIG.3, the circumferential direction of the sheet | seat 62 of the 2nd heating body 60B is provided in the circumferential direction both edges of the 2nd decoration site | part 40B used as the assembly position with the 1st decoration site | part 40A. A locking portion 44C locked with the one end 62C and a locking portion 44D locked with the other end 62D in the circumferential direction of the sheet 62 are provided. Similarly to the locking portion 44A and the locking portion 44B, the locking portion 44C and the locking portion 44D are formed integrally with the second decorative portion 40B and a pair, and from both edges of the second decorative portion 40B. It is formed as a protruding portion having a rectangular cross section protruding toward the rim cored bar 20 side (inner side). That is, in the second heating body 60B, one end 62C of the sheet 62 is locked by the locking portion 44C, and the other end 62D of the sheet is locked by the locking portion 44D, and the concave shape of the inner periphery 42B is obtained. In the state where the same curved surface shape is drawn and bent toward the second decorative portion 40B, the second decorative portion 40B is bonded. The protruding dimension d and shape of the locking part 44C and the locking part 44D are the same as the protruding dimension d and shape of the locking part 44A and the locking part 44B.

(Manufacturing method of decoration part)
Here, the manufacturing method of the above-mentioned decorating part 40 is demonstrated easily using FIG.5 and FIG.6. First, a square member 40C serving as a raw material of the first decoration portion 40A of the decoration unit 40 is prepared (see FIG. 5). On the other hand, a cutting tool 80 for cutting the square bar 40C is prepared (see FIG. 5). The cutting tool 80 has a hemispherical blade portion 82 that forms a concave curved surface shape of the inner periphery 42A of the first decorative portion 40A, a diameter smaller than the diameter of the blade portion 82, and the locking portion 44A and the locking portion 44B. And a cylindrical blade portion 84 forming the protruding portion. The cutting tool 80 is moved relative to the square bar 40C while rotating the cutting tool 80 relatively from one end to the other end in the longitudinal direction of the square bar 40C. As a result, as shown in FIG. 5, a concave curved inner periphery 42 </ b> A, a locking portion 44 </ b> A, and a locking portion 44 </ b> B are formed on the square member 40 </ b> C. Using a similar cutting tool 80, a concave surface-shaped inner periphery 42B, a locking portion 44C, and a locking portion 44D are formed on a square member 40D as a raw material of the second decorative portion 40B (see FIG. 6).

  Next, the first heating body 60A is bonded along the inner periphery 42A of the square member 40C via the adhesive 50A (see FIG. 6). At this time, in the first heating body 60A, one end 62A of the sheet 62 is locked to the locking portion 44A, and the other end 62B is locked to the locking portion 44B. Is maintained in a state of being curved into a concave curved surface shape. For this reason, regardless of whether the adhesive 50A is dried or not, the first heating body 60A is in close contact with the inner periphery 42A of the first decorative portion 40A via the adhesive 50A. On the other hand, the first heating body 60A does not float.

  Similarly, the 2nd heating body 60B is adhere | attached via the adhesive agent 50B along the inner periphery 42B of square member 40D (refer FIG. 6). At this time, in the second heating body 60B, one end 62C of the sheet 62 is locked to the locking portion 44C, and the other end 62D is locked to the locking portion 44D. It is maintained in a state of being bent into a concave curved surface shape along the line. For this reason, the 2nd heating body 60B is closely_contact | adhered via the adhesive agent 50B to the inner periphery 42B of the 2nd decorating part 40B irrespective of before and behind drying of the adhesive agent 50B, and after drying of the adhesive agent 50B, it becomes inner periphery 42B. On the other hand, the second heating body 60B does not float.

  Next, as shown in FIG. 6, the square member 40 </ b> C and the square member 40 </ b> D are bonded to each other with an adhesive 52 so as to cover the periphery of the rim cored bar 20 and face each other with the inner circumference 42 </ b> A and the inner circumference 42 </ b> B. Then, the square member 40C and the square member 40D are assembled to the rim core member 20. A spacer 48 is interposed between the rim core member 20 and the square members 40C and 40D. Subsequently, the outsides of the square member 40C and the square member 40D are scraped into a circular arc shape in cross section. As a result, as shown in FIG. 3 described above, the semi-cylindrical first decorative portion 40A and the semi-cylindrical second decorative portion 40B are formed, and the cylindrical decorative member in which they are assembled is formed. The decoration part 40 is formed.

  As shown in FIG. 6 described above, when the square member 40C and the square member 40D are bonded by the adhesive 52, the excess surplus portion 52A of the adhesive 52 is outward from the bonding surface of the square member 40C and the square member 40D. Protruding. The surplus portion 52A does not need to be removed by providing a step, and is removed when the outsides of the square member 40C and the square member 40D are scraped. Moreover, since the excess surplus part (a code | symbol is abbreviate | omitted) of the adhesive agent 52 protruded inside from an adhesive surface does not affect the decorating property of the decorating part 40, it is left as it is, without removing especially. .

(Operation and effect of the present embodiment)
As shown in FIG. 1, the steering wheel 10 according to the present embodiment is provided with a tubular decorative portion 40 that can be gripped by an occupant. As shown in FIGS. 2 and 3, the decorating unit 40 is configured by assembling the decorated first decorated part 40A and the second decorated part 40B. And while the sheet-like 1st heating body 60A is provided in the inner periphery 42A of the 1st decorating site | part 40A, the sheet-like 2nd heating body 60B is provided in the inner periphery 42B of the 2nd decorating site | part 40B.

  Here, as shown in FIGS. 3 and 4, the first decorative portion 40A is provided with a pair of locking portions 44A and locking portions 44B in the circumferential direction of the decorative portion 40, and the first heating body 60A is provided. It latches by 44 A of latching | locking parts and 44B of latching parts in the state bent to the 1st decorating part 40A side. Similarly, the second decorative portion 40B is provided with a pair of locking portions 44C and locking portions 44D in the circumferential direction of the decorative portion 40, and the second heating body 60B is bent toward the second decorative portion 40B side. To be locked to the locking portion 44C and the locking portion 44D. For this reason, since the shape restoring force of the 1st heating body 60A and the 2nd heating body 60B is restrict | limited, the dispersion | variation in the distance of 40 A of 1st decorating parts and the 1st heating body 60A, and 2nd decorating part 40B and 1st Variation in distance from the two heating bodies 60B can be suppressed.

  Therefore, according to the steering wheel 10 according to the present embodiment, the thermal resistance between the first heating body 60A and the first decoration part 40A and the second heating body 60B and the second decoration part 40B. Since the variation in thermal resistance can be suppressed, the variation in heat transmitted from the heating body 60 to the decorating unit 40 can be suppressed.

  In particular, as shown in FIG. 3, in the steering wheel 10, the concave curved surface shape of the inner periphery 42A of the first decorative portion 40A matches the curved shape of the first heating body 60A. The distance between 40A and the first heating body 60A can be reduced. Similarly, since the concave curved surface shape of the inner periphery 42B of the second decorative portion 40B matches the curved shape of the second heating body 60B, the distance between the second decorative portion 40B and the second heating body 60B is reduced. can do. For this reason, since the thermal resistance from the heating body 60 to the decorating part 40 can be reduced, the decorating part 40 is efficiently warmed by the heating body 60.

  Further, in the steering wheel 10 according to the present embodiment, as shown in FIGS. 2 to 4, the locking portion 44 </ b> A and the locking portion 44 </ b> B are arranged at a position where the first decorative portion 40 </ b> A is assembled. 44 A of stop parts and the latching | locking part 44B protrude from the both edge parts of 40 A of 1st decoration parts to the inner periphery 42A side. Similarly, the locking portion 44C and the locking portion 44D are disposed at a position where the second decorative portion 40B is assembled, and the locking portion 44C and the locking portion 44D are located from both edges of the second decorative portion 40B. It protrudes toward the circumference 42B. For this reason, the assembly area (adhesive area of the adhesive agent 52) of the 1st decoration site | part 40A and the 2nd decoration site | part 40B can be increased in the protrusion direction of the latching | locking part 44A-the latching | locking part 44D. Therefore, in order to increase the assembly area of the first decorative part 40A and the second decorative part 40B, the first decorative part 40A and the second decorative part 40B except for the locking part 44A to the locking part 44D. There is no need to increase the wall thickness. That is, the thermal resistance of the decoration part 40 can be reduced by reducing the thickness of the decoration part 40. In the present embodiment, the thickness of the decorative portion 40 can be reduced to 2.5 mm to 3.5 mm. As a result, the decoration part 40 can be efficiently warmed by the heating body 60.

  Furthermore, in the steering wheel 10 according to the present embodiment, as shown in FIGS. 2 and 5, the locking portion 44 </ b> A and the locking portion 44 </ b> B are provided in the entire extending direction of the first decorative portion 40 </ b> A. The locking portion 44C and the locking portion 44D are provided in the entire extending direction of the second decorative portion 40B. For this reason, while the assembly area (bonding area of the adhesive agent 52) of the 1st decorating part 40A can be increased in all the extending directions of the 1st decorating part 40A, the extension of the 2nd decorating part 40B can be increased. The assembly area of the second decorative portion 40B (the adhesion area of the adhesive 52) can be increased in all the existing directions. Therefore, the thickness of the first decorative portion 40A and the second decorative portion 40B excluding the locking portion 44A to the locking portion 44D can be further reduced, and the thermal resistance of the decorative portion 40 can be further reduced. Can do.

  Further, in the steering wheel 10 according to the present embodiment, as shown in FIG. 3 and FIG. 4, the first heating body 60A is bonded to the first decoration part 40A via the adhesive 50A. The shape restoring force of the heating body 60A is further limited. Similarly, since the 2nd heating body 60B is adhere | attached on the 2nd decorating part 40B via the adhesive agent 50B, the shape restoring force of the 2nd heating body 60B is further restrict | limited. For this reason, the dispersion | variation in the distance of 40 A of 1st decorating site | parts and 60 A of 1st heating bodies, and the dispersion | variation in the distance of the 2nd decorating site | part 40B and the 2nd heating body 60B can further be suppressed. In addition, the air layer between the first decorative portion 40A and the first heating body 60A can be reduced. Similarly, the air layer between the 2nd decorating site | part 40B and the 2nd heating body 60B can be decreased. For this reason, since an air layer with high heat resistance is reduced, the heat resistance from the heating body 60 to the decorating part 40 can be reduced.

[Second Embodiment]
Hereinafter, a steering wheel according to a second embodiment of the present invention will be described with reference to FIG. Note that, in the present embodiment, the same components as those of the steering wheel 10 according to the first embodiment are denoted by the same reference numerals, and the description of the same components is omitted because it is repeated.

(Composition of decoration part)
As FIG. 7 shows, the decoration part 40 of the steering wheel 10 which concerns on this Embodiment is a pair of 1st decoration site | part 40A and 2nd decoration similarly to the decoration part 40 of 1st Embodiment. The part 40B is assembled and configured. A locking portion 44A and a locking portion 44B are provided at both circumferential edges of the first decorative portion 40A. The locking portion 44A and the locking portion 44B are provided not at all in the extending direction of the first decorative portion 40A but at a part thereof. The location on the inner peripheral 42A side along the circumferential edge of the first decorative portion 40A where the locking portion 44A and the locking portion 44B of the first decorative portion 40A are not provided is the first decorative portion 40A. It can be used as a passage 44E and a passage 44F that communicate with the second decorative portion 40B.

  Similarly, a locking portion 44C and a locking portion 44D are provided at both circumferential edges of the second decorative portion 40B. The locking part 44C and the locking part 44D are disposed at positions corresponding to the locking part 44A and the locking part 44B, and are provided in a part of the extending direction of the second decorative portion 40B. Locations on the inner circumference 42B side along the circumferential edge of the second decorative portion 40B where the locking portion 44C and the locking portion 44D of the second decorative portion 40B are not provided are used as the passage 44E and the passage 44F. It is possible.

(Operation and effect of the present embodiment)
In the steering wheel 10 according to the present embodiment, as shown in FIG. 7, in addition to the operational effects obtained by the steering wheel 10 according to the first embodiment, the locking portion 44 </ b> A and the locking portion 44 </ b> B are the first. It is provided in a part of the extending direction of the decoration part 40A. Similarly, the locking portion 44C and the locking portion 44D are provided in a part of the extending direction of the second decorative portion 40B. For this reason, the locking part 44A and the locking part 44B are provided in the other part of the extending direction of the first decorative part 40A, and the locking part 44C and the locking part are provided in the other part of the extending direction of the second decorative part 40B. Since 44D is not provided, the first heating body 60A provided in the first decoration part 40A and the second heating body 60B provided in the second decoration part 40B include the locking part 44A to the locking part. It can be simply connected through the harness 78 (see FIG. 1) or the wiring for connection 66 (see FIG. 2) through the places (the passage 44E and the passage 44F) where 44D is not provided.

[Supplementary explanation of the above embodiment]
The present invention is not limited to the above-described embodiment, and can be modified as follows, for example, without departing from the scope of the invention. For example, in the said embodiment, although the heating body was provided only in the decorating part, this invention may provide a heating body also in a holding part. Moreover, this invention may provide a heating body in any one of the 1st decorating site | part of a decorating part, and a 2nd decorating site | part. Furthermore, the present invention increases the ratio of the semi-cylindrical shape of the first decorative portion of the decorative portion and the proportion of the semi-cylindrical shape of the second decorative portion (percentage of the length in the circumferential direction of the decorative portion) by 50%. For example, the semi-cylindrical ratio may be set to 40% and 60%. Moreover, in this invention, the decoration site | part may be divided | segmented into 3 or more division | segmentation in the circumferential direction of a decoration part.

  Furthermore, in the present invention, a decorative portion may be assembled to the entire circumference of the steering wheel without providing a grip portion. The present invention is not limited to an annular steering wheel, and can be applied to, for example, a rectangular or H-shaped steering.

10 Steering wheel (steering)
12 cored bar 16 steering shaft 20 rim cored bar part 24 gripping part 40 decoration part 40A first decoration part 40B second decoration part 40C, 40D square material 42A, 42B inner circumference 44A-44D locking part 44E, 44F passage 50 , 50A, 50B, 52 Adhesive 60 Heating body 60A First heating body 60B Second heating body 62A, 62C One end 62B, 62D The other end

Claims (5)

Decorated decoration parts are assembled, a tubular decorative part that can be held by the occupant,
A sheet-like heating body provided on the inner peripheral side of the decorative portion;
A pair of the decorative portions are provided in the circumferential direction of the decorative portion, and the heating body is locked in a state of being curved into a concave curved shape along the inner periphery of the decorative portion against the shape recovery force. A locking portion to be
Steering with. The locking portion includes a steering according to claim 1, wherein the protruding portion that protrudes to the inner circumferential side from the circumferential edges of the decorative portion.   The steering according to claim 1 or 2, wherein a plurality of the decorative portions are provided, and the locking portion is provided in a part of the extending direction of the decorative portions.   The steering according to claim 2, wherein the locking portion is provided in the entire extending direction of the decoration part.   The steering according to any one of claims 1 to 4, wherein the heating body is bonded to the decoration part via an adhesive.

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