JPH02117953U

JPH02117953U -

Info

Publication number: JPH02117953U
Application number: JP2793789U
Authority: JP
Priority date: 1989-03-10
Filing date: 1989-03-10
Publication date: 1990-09-21
Anticipated expiration: 2004-03-10
Also published as: JP2536106Y2

Description

[Brief explanation of the drawing]

第１図はこの考案に係るワイパ装置の一実施例
を示すワイパブレード側を省略した正面方向から
の説明図、第２図は第１図−線での拡大断面
説明図、第３図は第１図のワイパ装置の車体への
取付状況を示す外観概略説明図、第４図は第１図
のワイパ装置のピボツトまわりの状況を示す部分
斜視説明図、第５図はこの考案に係るワイパ装置
の払拭面上におけるワイパブレードの位置とワイ
パブレードに対する押圧力との関係を説明するフ
ローチヤート、第６図はこの考案に係るワイパ装
置の作用を示す概略説明図、第７図はワイパブレ
ードの反転時の状態を説明する部分拡大断面図、
第８図は従来のワイパ装置におけるアームヘツド
およびワイパアームでの縦断面説明図、第９図は
従来のワイパ装置の払拭面上におけるワイパブレ
ードの位置とワイパブレードに対する押圧力との
関係を示すフローチヤートである。１……ワイパ装置、４……車体、５……払拭面
、６……アームヘツド、７……ワイパアーム、８
……コイルスプリング（ブレード押圧用弾性体）
、１２……ワイパブレード、２０……レバー、２
０ｃ……ローラ保持壁（カムフオロワ）、２０ｄ
……ローラ軸（カムフオロワ）、２０ｅ……ロー
ラ（カムフオロワ）、３０……押圧力変更カム、
３０ａ……中間部カム面（カム部）、３０ｂ……
端部カム面（カム部）。 Fig. 1 is an explanatory view from the front direction showing one embodiment of the wiper device according to this invention, with the wiper blade side omitted; Fig. 2 is an explanatory enlarged cross-sectional view taken along the line - Fig. 1; Fig. 1 is a schematic external view showing how the wiper device is installed on the vehicle body, Fig. 4 is a partial perspective view showing the situation around the pivot of the wiper device shown in Fig. 1, and Fig. 5 is the wiper device according to this invention. Flowchart for explaining the relationship between the position of the wiper blade on the wiping surface and the pressing force on the wiper blade, FIG. 6 is a schematic explanatory diagram showing the operation of the wiper device according to this invention, and FIG. 7 is a diagram showing the reversal of the wiper blade. A partially enlarged sectional view explaining the state at the time,
FIG. 8 is an explanatory longitudinal cross-sectional view of the arm head and wiper arm in a conventional wiper device, and FIG. 9 is a flowchart showing the relationship between the position of the wiper blade on the wiping surface of the conventional wiper device and the pressing force against the wiper blade. be. DESCRIPTION OF SYMBOLS 1... Wiper device, 4... Vehicle body, 5... Wiping surface, 6... Arm head, 7... Wiper arm, 8
...Coil spring (elastic body for pressing the blade)
, 12... wiper blade, 20... lever, 2
0c...Roller holding wall (cam follower), 20d
...Roller shaft (cam follower), 20e...Roller (cam follower), 30...Press force changing cam,
30a... intermediate cam surface (cam part), 30b...
End cam surface (cam part).

Claims

[Scope of Claim for Utility Model Registration] An arm head rotatably attached to the vehicle body, a wiper arm having one end pivotally supported by the arm head and a wiper blade attached to the other end, and a wiper arm provided between the arm head and the wiper arm. a blade-pressing elastic body that presses the wiper blade against the wiping surface; and a blade-pressing elastic body that extends along the arm head and is lever-supported at an intermediate portion by the arm head, and one end is connected to the blade-pressing elastic body. and a lever having a cam follower provided at the other end thereof, and a blade pressing elastic body connected to one end of the lever at an intermediate portion of the rotation range of the cam follower provided at the other end of the lever, in a direction away from the wiper arm side. A cam portion that strengthens the pressing force against the wiping surface of the wiper blade and an elastic body for pressing the blade connected to one end of the lever at both ends of the rotation range of the cam follower are displaced in the direction approaching the wiper arm side, and the wiper blade is moved closer to the wiper arm side. A wiper device comprising: a pressing force changing cam continuously formed with a cam portion that weakens the pressing force against the wiped surface;