JP2019177749A - Steering wheel - Google Patents

Abstract

To provide a steering wheel capable of retaining a harness, which is disposed inside a lower cover, by readily coping with a change in an industrial design of the lower cover.SOLUTION: A harness 45 that is connected to electronic equipment 40 in a boss is disposed inside a lower cover 10 that shields an undersurface of a center boss B. The harness 45 is retained by a harness retainer 36 of a harness retaining member 30 disposed inside the lower cover 10. The harness retaining member 30 is disposed while being attached to the lower cover 10 as a body independent of the lower cover 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a steering wheel in which a harness connected to an electronic device in a boss portion is disposed in a lower cover that covers a lower surface side of a central boss portion.

  Conventionally, various electronic devices are arranged in the center boss portion of the steering wheel, and the harness connected to these electronic devices does not move freely in the boss portion when the steering wheel is steered. It was sandwiched and held between the outer peripheral wall of the lower cover covering the lower surface side of the boss part and the inner wall protruding upward from the bottom wall of the lower cover (see, for example, Patent Document 1).

JP 2017-88084 A

  However, in the conventional steering wheel, the harness is held using the outer peripheral wall and the inner wall formed on the lower cover itself. Therefore, if the shape of the lower cover, that is, the design of the lower cover is changed, the harness is newly held. The outer peripheral wall and the inner wall, which are the parts, must be redesigned and the holding part must be arranged. At that time, the lower cover is made of synthetic resin, and it is necessary to prevent the occurrence of sink marks at the time of molding and also to manage the wall thickness of the outer peripheral wall, etc., which is troublesome and easy to use within the lower cover. There was a problem with holding the harness.

  The present invention solves the above-described problems, and provides a steering wheel that can easily cope with and maintain a harness disposed in a lower cover even when the design of the lower cover is changed. With the goal.

A steering wheel according to the present invention is a steering wheel configured by arranging a harness connected to an electronic device in the boss portion in a lower cover that covers a lower surface side of a central boss portion,
A harness holding member having a harness holding portion capable of holding the harness is attached to the lower cover as a separate body from the lower cover, and is arranged.

  In the steering wheel according to the present invention, the harness is held in the harness holding portion of the harness holding member, and the harness holding member itself is configured to be attached to the lower cover as a separate body from the lower cover. Therefore, even if the design of the lower cover is changed, it can be dealt with simply by providing an attachment site corresponding to the harness holding member. And the attachment part of the lower cover corresponding to this harness holding member is simply an attachment hole or the like without providing two three-dimensionally projecting walls separated by a predetermined distance so as to hold and hold the linear harness. It is possible to deal with it simply by providing.

  Therefore, in the steering wheel according to the present invention, even if the design of the lower cover is changed, it is possible to easily cope with the harness disposed in the lower cover.

  In the steering wheel according to the present invention, it is preferable that the harness holding member fastens the electronic device together with the electronic device to the lower cover when the harness holding member is attached to the lower cover.

  In such a configuration, if the harness holding member is attached to the lower cover, the electronic device can be attached to the lower cover, and the electronic device and the harness holding member can be efficiently attached to the lower cover, and the attachment to the lower cover is also possible. The site can be shared by the electronic device and the harness holding member, and even if the design of the lower cover is changed, it is not necessary to consider the mounting site for the electronic device, so it can be easily dealt with.

  Moreover, in the steering wheel according to the present invention, even if the harness is an extended portion extending from the spiral harness on the steering column side, the posture can be suitably stabilized and held.

  That is, the steering wheel rotates relative to the lower steering column side during steering. However, since the extension part of the spiral harness extending from the steering column side is held by the harness holding member disposed on the lower cover of the steering wheel closest to the steering column side, the steering wheel can be rotated and steered. The extension part of the spiral harness is maintained in the posture inserted in the lower cover, and does not interfere with various parts in the boss part, and the signal and power supplied through the harness can be stably supplied to the electronic device. Can be supplied.

  In the steering wheel according to the present invention, it is desirable that the harness holding member is attached by a screw fastened to the bottom wall of the lower cover.

  In such a configuration, even if the design of the lower cover is changed, the effect on the bottom wall of the lower cover due to the change remains in the vicinity of the outer peripheral edge, so the mounting hole for fastening the screw as the mounting portion of the harness holding member is It can be easily disposed on the bottom wall, and therefore, even if the design of the lower cover is changed, it can be more easily dealt with.

1 is a schematic plan view of a steering wheel according to an embodiment of the present invention. It is a schematic sectional drawing of the state mounted in the vehicle in the steering wheel of embodiment, and respond | corresponds to the II-II site | part of FIG. It is a schematic plan view including a part on the steering column side near the lower cover in the steering wheel of the embodiment. It is a schematic perspective view which shows the harness holding member vicinity in the lower cover of embodiment. It is the schematic perspective view which assembled | attached the harness holding member of embodiment to the electronic device. It is a perspective view of the harness holding member of an embodiment. It is a front view of the harness holding member of an embodiment. It is a bottom view of the harness holding member of an embodiment. It is a perspective view of the electronic device of an embodiment. It is a schematic sectional drawing of the attachment site | part vicinity to the lower cover of the harness holding member in the steering wheel of embodiment. It is a schematic sectional drawing near the harness holding part of the harness holding member in the steering wheel of an embodiment. It is a perspective view which shows the modification of the harness holding member of embodiment. It is a schematic sectional drawing which shows the state which the harness holding member shown in FIG. 12 hold | maintained the harness.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A steering wheel 1 according to an embodiment includes a ring portion R gripped by a driver and a central boss of the ring portion R as shown in FIGS. A portion B and a spoke portion S that connects the ring portion R and the boss portion B are provided. The ring part R, the boss part B, and the spoke part S are provided with a core metal 2 that connects the parts. The core metal 2 includes a ring core metal 5 disposed in the ring portion R, a boss core metal 3 disposed in the boss portion B, and a ring core metal 5 and the boss core metal 3 disposed in the spoke portion S. It is comprised from the spoke metal core 4 which connects. The core metal 2 is made of a boss 3a of a boss core metal 3 connected to the steering shaft SS with a nut N, and the other part is formed by die casting from a light alloy material such as an aluminum alloy. .

  In the steering wheel 1, a covering portion 7 is disposed around the ring core 5 and the periphery of the spoke core 4 near the ring core 5. The covering portion 7 is configured by providing leather on the outer peripheral surface side of a resin portion such as urethane covering the core bars 4 and 5. In the case of the embodiment, the spoke core S 4 is not disposed in the spoke portion S on the rear side, and the decorative cover 9 is disposed.

  Moreover, the pad 8 which assembled | attached the airbag apparatus is attached to the upper side of the boss | hub part B, and synthetic resin, such as a polypropylene, is covered to the lower side of the boss | hub part B so that the lower surface side of the boss | hub part B may be covered. A deep dish-shaped lower cover 10 is provided.

  As shown in FIGS. 2, 3, 10, and 11, the lower cover 10 has an annular bottom wall 11 that surrounds the periphery of the boss core 3 and an upward-opening cylindrical shape that extends upward from the outer peripheral edge 11 a of the bottom wall 11. The outer peripheral wall 20 is configured.

  The bottom wall 11 has an insertion hole 12 in the center so that the boss core 3 is exposed upward, and the lower cover 10 is fixed to the boss core 3 with screws 25 around the insertion hole 12 (see FIG. 1). A plurality of mounting boss portions 14 for mounting, a mounting portion 16 to which a later-described harness holding member 30 is fixed with a screw 26 and a mounting portion 18 to which an electronic device 40 to be described later is fixed with a screw 27 are formed. Each mounting boss portion 14 is formed with a mounting hole 14a for fastening a screw 25 (see FIGS. 3 and 4). Attachment holes 16a and 18a for fastening screws 26 and 27 are also formed in the attachment parts 16 and 18 (see FIGS. 3 and 10). In the case of the embodiment, the attachment part 18 protrudes upward from the bottom wall 11 as a columnar shape having the same shape as the attachment part 16 to which the harness holding member 30 is attached.

  The outer peripheral wall 20 is disposed so as to extend upward from the peripheral edge of the bottom wall 11 in the vicinity of each spoke portion S so as to cover the lower surface side in the vicinity of the boss portion B of each spoke portion S. And the attachment piece part 22 for fixing the outer peripheral wall 20 to the spoke metal core 4 with the screw 28 is arrange | positioned in the site | part of the right and left spoke part S (refer FIG. 3). The attachment piece portion 22 is provided so as to close the opening 21 from the front and rear edges of the left and right openings 21, and is provided with an attachment hole 22a through which the screw 28 (see FIG. 1) is inserted.

  Further, when the steering wheel 1 is fastened to the steering shaft SS by fastening the boss 3a of the boss core 3 with a nut N and mounted on the vehicle, a spiral harness 55 is provided on the steering column 50 side. A spiral harness case 51 disposed inside is disposed below the bottom wall 11 of the lower cover 10 (see FIGS. 2 to 4, 10 and 11). The case 51 is rotatably arranged with respect to the lower fixed side portion 53 so that the rotation side portion 52 on the upper surface side can rotate integrally with the steering wheel 1 during rotation steering. Further, a female connector 54 connected to the spiral harness 55 is provided on the rotating side portion 52 so as to project upward (see FIG. 4), and the male connector 46 is fitted into the connector 54. The harness 45 is connected to the electronic device 40 disposed in the lower cover 10 of the boss B.

  In the case of the embodiment, the electronic device 40 is a control device that controls driving of a vibration motor (not shown) provided in the ring portion R and the like, and controls on / off of a heater (not shown) provided in the ring portion R. An operation control signal and power from a control device (not shown) on the side are supplied via the spiral harness 55 and the harness 45. Therefore, the harness 45 is configured as an extended portion (extended portion) of the spiral harness 55. The harness 45 is provided with male connectors 46 and 47 at both ends, the connector 46 is connected to the connector 54 on the spiral harness case 51 side, and the connector 47 is a female connector provided on the electronic device 40. 41. In the case of the embodiment, the harness 45 is covered with a tube 48 made of synthetic resin having flexibility such as polyethylene.

  Moreover, as shown in FIGS. 2 to 5 and 9, the electronic device 40 includes a curved box-shaped main body portion 40a, and attachments with attachment holes 42a and 43a penetrating at both ends of the main body portion 40a, respectively. Flanges 42 and 43 are provided.

  A harness holding member 30 that holds the harness 45 is disposed in the lower cover 10 of the boss portion B. The harness holding member 30 is formed from a synthetic resin such as polypropylene. As shown in FIGS. 2 to 10 and 11, the harness holding part 36 is protruded upward from the outer peripheral edge of the ceiling wall part 31. And an outer peripheral wall portion 32 extending downward. The ceiling wall portion 31 is configured to be divided into an upper portion 31a and a lower portion 31b by providing a stepped side wall portion 31c (see FIG. 10) extending in the vertical direction to provide an upper and lower step. The lower portion 31b constitutes an attachment portion 34 attached to the attachment portion 16 of the lower cover 10, and has an attachment hole 34a through which the screw 26 is inserted vertically penetrated.

  The lower surface side of the ceiling wall portion 31 surrounded by the outer peripheral wall portion 32 constitutes an assembly recess 33 into which one end portion 40b side of the electronic device 40 is fitted, and the lower surface side of the upper portion 31a is the electronic device 40. The main body portion 40a is provided with a main body side portion 33a that accommodates the end portion 40b side, and the lower surface side of the lower portion 31b is provided with an attachment side portion 33b that accommodates the attachment flange 42 side of the electronic device 40. The main body side portion 33a is a part surrounded by the step side wall portion 31c on the lower surface side of the upper portion 31a and the main body side wall portion 32a extending downward from the edge of the upper portion 31a of the outer peripheral wall portion 32, and the mounting side portion 33b is This is an area around the mounting hole 34a on the lower surface side of the lower portion 31b and is a portion surrounded by the mounting side wall portion 32b of the outer peripheral wall portion 32 on the lower surface side of the lower portion 31b. The attachment side wall portion 32b includes a separation portion 32ba separated from the outer peripheral edge of the lower portion 31b so as to surround the periphery of the attachment hole 34a on the lower surface side of the lower portion 31b (see FIGS. 7 and 8).

  The harness holding portion 36 is configured to project upward from the vicinity of the stepped side wall portion 31c of the ceiling wall portion 31 so that the two locking hooks 37 and 38 are opposed to each other. The locking hooks 37, 38 are provided with flanges 37b, 38b protruding from the shaft portions 37a, 38a so as to approach each other at the tips of the shaft portions 37a, 38a extending upward from the ceiling wall portion 31, It is configured. Each of the flange portions 37b and 38b has guide surfaces 37c and 38c whose upper surface is inclined inward and downward in the opposing direction of the locking hooks 37 and 38, and the harness 45 is a holding recess between the locking hooks 37 and 38. It is configured to be easily housed in 36a. That is, when the harness 45 is inserted into the holding recess 36a from the opening 36b between the flanges 37b and 38b of the locking hooks 37 and 38, even if the harness 45 is displaced from the upper position of the opening 36b, the guide surface It is configured to be easily inserted into the holding recess 36a by sliding on 37c, 38c.

  Since the harness 45 is covered with the tube 48 and has a certain degree of shape retention, the connector 46 is coupled to the connector 54 on the case 51 side, and the connector 47 is connected to the connector 41 on the electronic device 40 side. When accommodated in the holding recess 36a in the coupled state, the straight tube 48 is inclined from a direction perpendicular to the opposing direction of the locking hooks 37 and 38 (see FIGS. 3 and 4), and the tube The outer peripheral surface 48a of 48 is brought into pressure contact with both outer peripheral surfaces (outer surfaces) 37aa and 38aa of the shaft portions 37a and 38a of the locking hooks 37 and 38, and is detached from the holding recess 36a by the flange portions 37b and 38b. Is held and held in the holding recess 36a in a state in which the deviation is suppressed by the frictional resistance.

  In the assembly of the steering wheel 1 according to the embodiment, a vibration motor or a heater (not shown) is provided at a predetermined portion of the ring core 5 and a covering portion 7 is provided at a predetermined portion of the ring core 5 or the spoke core 4. . Furthermore, a predetermined electronic device or the like is also attached to other boss cores 3 and spoke cores 4. Further, the lower cover 10 is covered with the mounting recess 33 of the harness holding member 30 on the end 40b side of the electronic device 40 so that the mounting holes 34a and 42a of the mounting portion 34 and the mounting flange 42 are aligned with each other. 34a and 42a are disposed above the mounting hole 16a of the mounting portion 16 of the lower cover 10, and the mounting hole 43a of the mounting flange 43 of the electronic device 40 is disposed above the mounting hole 18a of the mounting portion 18 of the lower cover 10. Then, the screw 26 is screwed into the mounting hole 16a of the mounting part 16 through the mounting holes 34a and 42a (see FIG. 10), and the screw 27 is passed through the mounting hole 43a to the mounting hole 18a of the mounting part 18. If they are screwed together (see FIG. 3), the harness holding member 30 and the electronic device 40 can be attached to the bottom wall 11 of the lower cover 10. Then, after attaching other predetermined parts or the like to the lower cover 10, the lower cover 10 is arranged on the lower side of the boss core 3, and the mounting boss part 14 or the mounting piece part 22 of the lower cover 10 is attached to the core metal 2. Screws 25 and 28 are arranged on the side of the core metal 2 through the mounting holes 14a and 22a of the mounting boss part 14 and the mounting piece part 22 arranged on the upper surface side of a predetermined mounting part of the boss core metal 3 and spoke core metal 4. When fastened, the lower cover 10 can be attached to the lower surface side of the boss core 3 or the spoke core 4 in the core 2 of the boss B.

  After that, the steering wheel 1 excluding the pad 8 with the airbag device is disposed on the vehicle-side steering column 50, the steering shaft SS is inserted into the boss 3a of the boss core 3, and the nut N is attached to the steering shaft SS. The steering wheel 1 is attached to the steering shaft SS by fastening.

  Then, the connector 46 of the harness 45 is connected to the connector 54 of the spiral harness case 51, the connector 47 of the harness 45 is connected to the connector 41 of the electronic device 40, and the harness 45 covered with the tube 48 is connected to the harness holding member. The harness holding portion 36 is inserted into the holding recess 36 a through the opening 36 b of the 30 harness holding portion 36.

  Thereafter, the pad 8 is connected to the cored bar 2 while connecting a harness (not shown) for supplying a signal or power to an airbag device or a horn operating circuit (not shown) to a predetermined part of the spiral harness case 51 and the pad 8 side. If the side assembly hole 6 (see FIGS. 1 and 2) is used for assembly on the core metal 2 side, the assembly of the steering wheel 1 is completed and the steering wheel 1 can be mounted on the vehicle.

  In the steering wheel 1 of the embodiment, the harness 45 is held by the harness holding part 36 of the harness holding member 30 in a state in which the harness 45 is prevented from coming off and the deviation is suppressed by the frictional resistance. The structure itself is configured to be attached to the lower cover 10 as a separate body from the lower cover 10. Therefore, even if the design of the lower cover 10 is changed, it can be dealt with by simply disposing the attachment portion 16 corresponding to the harness holding member 30. And the attachment part 16 of the lower cover 10 corresponding to this harness holding member 30 is simply provided without providing two three-dimensionally protruding walls or the like that are separated by a predetermined distance so as to sandwich and hold the linear harness. Simply providing the part 16 having the mounting hole 16a makes it possible to cope easily.

  Therefore, in the steering wheel of the embodiment, even if the design of the lower cover 10 is changed, the harness 45 disposed in the lower cover 10 can be held easily.

  In the steering wheel 1 according to the embodiment, the harness holding member 30 attaches the electronic device 40 to the lower cover 10 by fastening the electronic device 40 together with the harness holding member 30 when the harness holding member 30 is attached to the lower cover 10.

  Therefore, in the embodiment, if the harness holding member 30 is attached to the lower cover 10, the electronic device 40 can also be attached to the lower cover 10, and the attachment work of the electronic device 40 and the harness holding member 30 to the lower cover 10 is efficiently performed. The attachment part 16 to the lower cover 10 can be shared by the electronic device 40 and the harness holding member 30, and even if the design of the lower cover 10 is changed, the attachment part 16 for the electronic device 40 is not considered. Therefore, it can be dealt with easily.

  Moreover, in the steering wheel 1 of the embodiment, even if the harness 45 is an extended portion extending from the spiral harness 55 on the steering column 50 side, the posture can be suitably stabilized and held.

  That is, the steering wheel 1 rotates relative to the lower steering column 50 side during steering. However, the harness 45 as an extension portion of the spiral harness 55 extending from the steering column 50 side is disposed on the lower cover 10 (particularly, the bottom wall 11 in the embodiment) of the steering wheel 1 closest to the steering column 50 side. Since the harness holding member 30 is held in a state in which it is prevented from coming off and the deviation is suppressed, even if the steering wheel 1 is rotated and steered, the harness 45 as an extension part of the spiral harness 55 is The posture inserted into the lower cover 10 is maintained, and signals, power, etc. supplied via the harness 45 can be stably supplied to the electronic device 40 without interfering with various components in the boss B. it can.

  In the steering wheel 1 of the embodiment, the harness holding member 30 is attached by a screw 26 fastened to the bottom wall 11 of the lower cover 10.

  Therefore, in the embodiment, even if the design of the lower cover 10 is changed, the outer peripheral wall 20 is mainly changed, and the influence on the bottom wall 11 of the lower cover 10 due to the change remains in the vicinity of the outer peripheral edge 11a. The mounting hole 16a for fastening the screw 26 as the mounting portion 16 of the holding member 30 can be easily disposed on the bottom wall 11 even if the cylindrical mounting portion 16 is included. Therefore, the design of the lower cover 10 is changed. Can be dealt with more easily.

  In the embodiment, a pair of locking hooks 37 and 38 is provided as the harness holding part 36 of the harness holding member 30 and is inserted into the holding recess 36a between the locking hooks 37 and 38 to prevent detachment. And it was set as the structure which hold | maintains the harness 45 in the state which suppressed deviation | shift. However, if the harness 45 can be held, a harness holding portion 36A that holds the harness 45 is configured by one locking hook 39 that extends upward from the ceiling wall portion 31 as in the harness holding member 30A shown in FIGS. May be.

  The locking hook 39 of the harness holding portion 36A has the same shape as the locking hook 37 of the harness holding member 30 of the embodiment, but using the restoring force from the deformed state of holding the harness 45. The harness 45 is held. That is, the arrangement position of the shaft portion 39 a extending upward from the ceiling wall portion 31 is determined from the straight line L (see FIG. 3) connecting the connectors 41 and 54 to which the connectors 46 and 47 at both ends of the harness 45 are coupled. As a position away from the electronic device 40, a flange portion 39b protrudes from the tip of the shaft portion 39a so as to be substantially parallel to the ceiling wall portion 31.

  This harness holding member 30 </ b> A includes a ceiling wall portion 31, an outer peripheral wall portion 32, and an attachment portion 34 similar to those of the harness holding member 30 of the embodiment, and uses the screws 26 similarly to the harness holding member 30. And attached to the lower cover 10. And if this harness holding | maintenance part 36A has arrange | positioned the harness 45 which is generating the restoring force to the arrangement | positioning side of the straight line L to the outer peripheral surface (outer surface) 39aa side of the axial part 39a directly under the collar part 39b, The harness 45 is pressed against the outer peripheral surface 39aa side of the shaft portion 39a by the restoring force, and is held by the harness holding portion 36A without being detached from the flange portion 39b and in a state where deviation is suppressed by frictional resistance. The Rukoto.

  In the harness holding member 30 of the embodiment, the harness holding member 30 is attached to the lower cover 10 by one screw 26 inserted through one attachment hole 34a. An attachment recess 33 is provided, and the rotation around the attachment hole 34a (screw 26) is restricted by the fitting of the assembly recess 33 to the end 40b. Therefore, even if it is attachment by one screw 26, the harness holding member 30 can be attached to the attachment part 16 of the lower cover 10 stably without rotating. That is, even if it is only one attachment part 16 protruding in a columnar shape, the harness holding member 30 can be attached without rotating, and even if the design of the lower cover 10 is changed in such an attachment part 16 It can be easily dealt with and protruded from the bottom wall of the changed lower cover.

  DESCRIPTION OF SYMBOLS 1 ... Steering wheel, 10 ... Lower cover, 11 ... Bottom wall, 16 ... Mounting part, 16a ... Mounting hole, 26 ... Screw, 30, 30A ... Harness holding member, 34 ... Mounting part, 34a ... Mounting hole, 36, 36A ... Harness holding part, 40 ... electronic device, 40a ... main body part, 42 ... mounting flange, 42a ... mounting hole, 45 ... (extension part) harness, 50 ... steering column, 55 ... spiral harness, B ... boss part.

Claims (4)

In the lower cover that covers the lower surface side of the central boss portion, a harness connected to the electronic device in the boss portion is a steering wheel that is arranged and configured,
A steering wheel, wherein a harness holding member having a harness holding portion capable of holding the harness is attached to the lower cover as a separate body from the lower cover.   The steering wheel according to claim 1, wherein the harness holding member fastens the electronic device together with the electronic device when the electronic device is attached to the lower cover when the harness holding member is attached to the lower cover.   The steering wheel according to claim 1, wherein the harness is an extended portion extending from a spiral harness on a steering column side. The steering wheel according to any one of claims 1 to 3, wherein the harness holding member is attached by a screw fastened to a bottom wall of the lower cover.

Images