CN-121989836-A - Conductive cloth, steering wheel with conductive cloth mounted thereon, and method for manufacturing steering wheel

Abstract

Provided are a conductive cloth, a steering wheel on which the conductive cloth is mounted, and a method for manufacturing the steering wheel, wherein the sensor sensitivity at the sewed portion can be prevented from being reduced. The conductive cloth for the steering wheel mounted on the movable body comprises a conductive woven cloth which is formed by a textile yarn containing crimped yarn, and the density of the woven cloth at the position corresponding to the sewing part of the surface skin of the steering wheel is higher than the density of the woven cloth at the position corresponding to the part of the surface skin except the sewing part under the state that the conductive cloth is mounted on the rim body of the steering wheel.

Inventors

• IEDA MASAAKI
• NAKAMURA SHINTARO
• IEDA JUNICHI
• NAKAYAMA SHIN
• Satsuji Toshinori

Assignees

• 丰田合成株式会社
• 世联株式会社

Dates

Publication Date

20260508

Application Date

20251106

Priority Date

20241107

Claims (4)

1. 1. A conductive cloth for a steering wheel mounted on a moving body, The conductive part comprises a conductive fabric which is formed by textile yarns containing crimped yarns, In a state where the conductive cloth is attached to the rim body of the steering wheel, the density of the woven cloth at a position of the steering wheel corresponding to the sewn portion of the skin is higher than the density of the woven cloth at a position corresponding to a portion of the skin other than the sewn portion.
2. 2. A steering wheel carrying the conductive cloth of claim 1.
3. 3. A method for manufacturing a steering wheel having a rim portion to be held by an occupant of a moving body, The manufacturing method comprises the following steps: A preparation step of preparing a rim body of the rim portion and a conductive cloth including a woven fabric having conductivity, the woven fabric being made of a woven yarn including crimped yarn, and And a covering step of covering the rim body with the conductive cloth so that the density of the woven cloth at a predetermined position corresponding to a sewn portion of the steering wheel, the sewn portion being covered with the conductive cloth, is higher than the density of the woven cloth at a position corresponding to a portion of the surface other than the sewn portion.
4. 4. The method for manufacturing a steering wheel according to claim 3, wherein, The sewing part is arranged along the inner periphery of the rim part when the steering wheel is seen from the front, The covering step includes: A step of disposing the conductive cloth along the outer peripheral surface of the rim body, and And a step of positioning the conductive cloth disposed on the outer peripheral surface so that both end portions of the conductive cloth are disposed at the predetermined positions of the rim body corresponding to the sewn portions, the conductive cloth being oriented toward the inner portion Zhou Lashen.

Description

Conductive cloth, steering wheel with conductive cloth mounted thereon, and method for manufacturing steering wheel Technical Field The present invention relates to a conductive cloth, a steering wheel on which the conductive cloth is mounted, and a method for manufacturing the steering wheel. Background Various steering wheels equipped with sensors for detecting the grip of an occupant have been proposed. For example, patent document 1 discloses a steering wheel having a sensor layer including a braid having conductivity. The sensor layer is covered by a skin. Patent document 1 Japanese patent laid-open No. 2022-026032 The skin is fixed by sewing the end portions of the skin members to each other, and the sensor layer is covered. To ensure the seam, the seam is thicker than the rest of the epidermis. Therefore, the sensitivity of the sensor for grip detection at the suture portion may be lowered. Disclosure of Invention The present invention can be implemented in the following manner. According to one aspect of the present invention, there is provided a conductive cloth for a steering wheel mounted on a moving body. The conductive cloth includes a conductive woven fabric composed of a spun yarn including a crimped yarn, and the density of the woven fabric is higher at a position of the steering wheel corresponding to a sewn portion of the skin than at a position corresponding to a portion of the skin other than the sewn portion in a state where the conductive cloth is attached to the rim body of the steering wheel. According to the conductive cloth of this aspect, the density of the woven fabric at the position corresponding to the sewn portion is higher than the density of the woven fabric at the position corresponding to the portion of the epidermis other than the sewn portion, so that the sensor sensitivity at the sewn portion can be suppressed from being lowered. Further, since the woven fabric is made of the spun yarn containing the crimped yarn, the woven fabric stretches easily as compared with a structure in which the spun yarn does not contain the crimped yarn. Thus, the density difference of the woven fabric in the conductive fabric can be easily set, and the density of the woven fabric at the position corresponding to the sewn portion can be easily increased. Further, since the conductive cloth includes the woven fabric, the deformation of the conductive cloth can be suppressed as compared with a structure in which the conductive cloth does not include the woven fabric but only the woven fabric. The invention can be implemented in various ways. For example, the present invention can be implemented as a steering wheel on which a conductive cloth is mounted, a moving body on which the steering wheel is mounted, a method of manufacturing the steering wheel, and the like. Drawings Fig. 1 is a front view of a steering wheel according to an embodiment of the present invention. Fig. 2 is a cross-sectional view of the rim portion taken along line II-II of fig. 1. Fig. 3 is a flowchart showing a flow of a method for manufacturing a steering wheel. Detailed Description A. Embodiments are described below: A1. the device structure is as follows: Fig. 1 is a front view of a steering wheel 100 according to an embodiment of the present invention. The X-axis, Y-axis, and Z-axis shown in the figure are axes representing directions intersecting each other at 90 degrees. In the present embodiment, the Y axis is parallel to the left-right direction of the vehicle, and the Z axis is parallel to the rotation axis 101. The steering wheel 100 of the present embodiment is mounted on a vehicle and is used for indicating the traveling direction of the vehicle. Steering wheel 100 has a hub portion 110, a rim portion 120, and spoke portions 130. The hub 110 is located at the center of the steering wheel 100 when viewed from the front, and is connected to the rotating shaft 101 of the vehicle. The rim portion 120 is provided so as to surround the periphery of the hub portion 110. The rim portion 120 is held by an occupant who manipulates the vehicle. The rim portion 120 of the present embodiment has an annular external shape. The spoke portions 130 interconnect the hub portion 110 and the rim portion 120. The spoke 130 is provided with a functional member such as a switch. Fig. 2 is a cross-sectional view of the rim portion 120 taken along line II-II of fig. 1. The rim portion 120 includes a rim body 200, a conductive cloth 300, and a skin 400. The rim body 200 has a rim core 210 and a buffer 220. The rim core 210 is a skeleton of the rim portion 120. The rim core 210 has a U-shape protruding toward the outer peripheral side of the steering wheel 100 (in a direction away from the rotation shaft 101) in a section parallel to the rotation shaft 101 and passing through the rotation shaft 101. The rim core 210 is composed of metal. The buffer 220 covers the rim core 210. In addition, "covering" in the present invention also refe