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CN-115151446-B - Reset cam

CN115151446BCN 115151446 BCN115151446 BCN 115151446BCN-115151446-B

Abstract

The return cam (40) has an annular member (41), a cam wall (42), and at least 1 reinforcing rib (43). The annular member (41) includes an outer peripheral portion (44), an inner peripheral portion (45), and A1 st surface (46) facing an axial direction (D1) parallel to the rotation axis (A1). The cam wall (42) extends from the outer peripheral portion (44) in the axial direction (D1) and extends along the outer peripheral portion (44) in the circumferential direction (D2). At least 1 reinforcing rib (43) connects the cam wall (42) and the annular member (41). The cam wall (42) has a1 st axial length (L1) defined in the axial direction (D1) from a1 st face (46). The inner peripheral portion (45) has a2 nd axial length (L2) defined from the 1 st surface (46) in the axial direction (D1). The 2 nd axial length (L2) is shorter than the 1 st axial length (L1).

Inventors

  • TAJIRI YOJI

Assignees

  • 古河电气工业株式会社
  • 古河AS株式会社

Dates

Publication Date
20260512
Application Date
20210203
Priority Date
20200302

Claims (12)

  1. 1. A reset cam having: An annular member rotatable about a rotation axis integrally with a steering shaft, the annular member including an outer peripheral portion, an inner peripheral portion, and a1 st surface oriented in an axial direction parallel to the rotation axis; A cam wall configured to return the turn signal switch from the active position to the neutral position, the cam wall extending in the axial direction from the outer peripheral portion and extending in the circumferential direction along the outer peripheral portion, and At least 1 reinforcing rib extending from the cam wall toward the inner peripheral portion and connecting the cam wall and the annular member, The cam wall has a1 st axial length defined in the axial direction from the 1 st face, The inner peripheral portion has a2 nd axial length defined from the 1 st face in the axial direction, The 2 nd axial length is shorter than the 1 st axial length, The cam wall extends across the inner peripheral portion from the outer Zhou Buqi toward the side where the inner peripheral portion is located in the axial direction.
  2. 2. The reset cam of claim 1, wherein, The annular member does not have a portion protruding from the 1 st face toward the axial direction in the inner peripheral portion.
  3. 3. The reset cam of claim 1 or 2, wherein, The at least 1 reinforcing rib extends from the cam wall toward the inner peripheral portion and connects the cam wall to the 1 st surface.
  4. 4. The reset cam of claim 1, wherein, The at least 1 reinforcing rib includes an inclined surface extending from the cam wall toward the 1 st surface and inclined with respect to the rotation axis.
  5. 5. The reset cam of claim 1, wherein, The at least 1 reinforcing rib has a3 rd axial length defined from the 1 st face in the axial direction, The 2 nd axial length is shorter than the 3 rd axial length.
  6. 6. The reset cam of claim 5, wherein, The 3 rd axial length is the 1 st axial length or less.
  7. 7. The reset cam of claim 5, wherein, The at least 1 stiffening rib has a radial length defined radially from the cam wall, The radial length is shorter than the 3 rd axial length.
  8. 8. The reset cam of claim 1, wherein, The at least 1 stiffening rib comprises a plurality of stiffening ribs.
  9. 9. The reset cam of claim 1, wherein, The cam wall includes a1 st circumferential end and a2 nd circumferential end, The cam wall extends in the circumferential direction from the 1 st circumferential end to the 2 nd circumferential end.
  10. 10. The reset cam of claim 9, wherein, The at least 1 stiffening rib comprises: A1 st reinforcing rib connected to the 1 st circumferential end, and And a2 nd reinforcing rib connected to the 2 nd circumferential end.
  11. 11. The reset cam of claim 10, wherein, The at least 1 reinforcing rib includes an intermediate reinforcing rib disposed between the 1 st reinforcing rib and the 2 nd reinforcing rib, At least one of the 1 st reinforcing rib and the 2 nd reinforcing rib has a thickness greater than that of the intermediate reinforcing rib.
  12. 12. The reset cam of claim 1, wherein, The annular member includes a1 st annular plate, a 2 nd annular plate, and an intermediate portion, The 1 st annular plate includes the inner peripheral portion, the 1 st surface and the 2 nd surface, The 2 nd annular plate includes the outer peripheral portion, A coupling portion extends from the 1 st annular plate in the axial direction, The 2 nd annular plate is disposed at a position offset from the 1 st annular plate in the axial direction, The outer diameter of the 2 nd annular plate is larger than the outer diameter of the 1 st annular plate, The intermediate portion extends from the 1 st annular plate to the 2 nd annular plate in the axial direction, The intermediate portion extends from the 2 nd face of the 1 st annular plate to the 2 nd annular plate in the axial direction, The cam wall extends from the outer Zhou Buqi in the axial direction beyond the 1 st annular plate toward the side where the 1 st annular plate is located, The cam wall is disposed radially outward of the intermediate portion.

Description

Reset cam Technical Field The disclosed technology relates to reset cams. Background Patent documents 1 and 2 describe reset cams used in a rotary connector device. Prior art literature Patent literature Patent document 1 Japanese patent application No. 5138022 Patent document 2 Japanese patent application laid-open No. 2010-143460 Disclosure of Invention Problems to be solved by the invention When the turn signal switch is operated from the neutral position to the active position, the ratchet of the turn signal switch contacts the reset cam. Therefore, it is preferable to secure the strength of the reset cam. On the other hand, it is preferable to reduce noise generated by contact of the winker switch with the reset cam. The technical subject of the application is to ensure the strength of a reset cam and reduce the noise generated by the contact of a turn signal switch and the reset cam. Means for solving the problems The reset cam of feature 1 has an annular member, a cam wall, and at least 1 stiffening rib. The annular member is rotatable about the rotation axis integrally with the steering shaft, and includes an outer peripheral portion, an inner peripheral portion, and a1 st surface oriented in an axial direction parallel to the rotation axis. The cam wall is configured to return the turn signal switch from the active position to the neutral position, and extends in the axial direction from the outer peripheral portion and in the circumferential direction along the outer peripheral portion. At least 1 reinforcing rib extends from the cam wall toward the inner peripheral portion and connects the cam wall and the annular member. The cam wall has a1 st axial length defined in an axial direction from the 1 st face. The inner peripheral portion has a 2 nd axial length defined from the 1 st surface in the axial direction. The 2 nd axial length is shorter than the 1 st axial length. In the reset cam according to the 1 st aspect, since the 2 nd axial length is shorter than the 1 st axial length, it is possible to suppress noise generated by contact between the winker switch and the cam wall from rattling radially inward of the cam wall. On the other hand, the connection strength between the annular member and the cam wall can be ensured by at least 1 reinforcing rib. This ensures the strength of the reset cam and reduces noise generated by contact between the winker switch and the reset cam. With regard to the reset cam of the 2 nd aspect, in the reset cam of the 1 st aspect, the annular member does not have a portion protruding axially from the 1 st face in the inner peripheral portion. In the reset cam according to the feature 2, the noise generated by the contact of the winker switch with the cam wall can be reliably suppressed from rattling radially inward of the cam wall. In the reset cam according to the 3 rd aspect, in the reset cam according to the 1 st or 2 nd aspect, at least 1 reinforcing rib extends from the cam wall toward the inner peripheral portion, and connects the cam wall to the 1 st surface. In the reset cam according to the 3 rd aspect, the connection strength between the annular member and the cam wall can be improved. In the reset cam according to the 4 th aspect, in the reset cam according to any one of the 1 st to 3 rd aspects, at least 1 reinforcing rib includes an inclined surface extending from the cam wall to the 1 st surface and inclined with respect to the rotation axis. In the return cam according to the 4 th aspect, the connection strength between the annular member and the cam wall can be improved, and the noise generated by the contact between the winker switch and the cam wall can be suppressed from rattling radially inward of the cam wall. With regard to the return cam of the 5 th feature, in the return cam of any one of the 1 st to 4 th features, at least 1 reinforcing rib has a3 rd axial length defined from the 1 st face in the axial direction. The 2 nd axial length is shorter than the 3 rd axial length. In the reset cam according to the 5 th aspect, the noise generated by the contact of the winker switch with the cam wall can be reliably suppressed from rattling radially inward of the cam wall. With regard to the reset cam of the 6 th aspect, in the reset cam of the 5 th aspect, the 3 rd axial length is 1 st axial length or less. In the reset cam according to the 6 th aspect, the generation of noise can be suppressed, and the reset cam can be reduced in weight. With regard to the return cam of the 7 th feature, in the return cam of the 5 th or 6 th feature, at least 1 reinforcing rib has a radial length defined from the cam wall in the radial direction. The radial length is shorter than the 3 rd axial length. In the reset cam according to the 7 th aspect, the generation of noise can be suppressed, and the reset cam can be reduced in weight. With regard to the reset cam of the 8 th aspect, in the reset cam of any one of the 1 st to 7 th aspects, at least 1 reinforcing ri