JPH0360459U

JPH0360459U -

Info

Publication number: JPH0360459U
Application number: JP12010589U
Authority: JP
Priority date: 1989-10-13
Filing date: 1989-10-13
Publication date: 1991-06-13

Description

[Brief explanation of the drawing]

第１図〜第７図は本考案の一実施例を示し、第
１図は一実施例に係るシートベルト巻取装置を示
す縦断面図、第２図は一部を取り除いてシートベ
ルト巻取装置の内部構造を概略的に示す正面図、
第３図はシートベルト巻取装置の要部を示す断面
図、第４図は第３図の矢視図、第５図は第３図
の矢視図、第６図はロツクアームと支持軸との
関係を示す拡大平面図、第７図ａ〜第７図ｆは作
動説明図で、第７図ａはウエビングを装着してな
いときの状態を示す図、第７図ｂはウエビングを
装着したときの状態を示す図、第７図ｃは巻取力
軽減位置を示す図、第７図ｄは巻取力軽減位置か
らウエビングを引出したときの状態を示す図、第
７図ｅはウエビングを巻取力軽減位置から最大記
憶位置まで引出したときの状態を示す図、第７図
ｆはウエビングを外したときの状態を示す図、第
８図は変形例の要部を示す断面図、第９図は第８
図の矢視図である。Ｗ……ウエビング、１……巻取装置本体、２…
…側板（ケース）、６……ウエビング巻取用巻取
軸、８……ラチエツトホイール、８ａ……歯、９
……小ばね、１０……大ばね、１２……コントロ
ールプレート、１２ｃ，１２ｅ……カム面、１２
ｄ……カム溝、３０……ロツクレバー、４０……
ロツクアーム、４０ａ……先端。 1 to 7 show an embodiment of the present invention, FIG. 1 is a vertical sectional view showing a seatbelt retractor according to an embodiment, and FIG. 2 is a partially removed seatbelt retractor. a front view schematically showing the internal structure of the device;
Figure 3 is a sectional view showing the main parts of the seat belt retractor, Figure 4 is a view taken in the direction of the arrow in Figure 3, Figure 5 is a view taken in the direction of the arrow in Figure 3, and Figure 6 shows the lock arm and support shaft. 7a to 7f are operation explanatory diagrams, FIG. 7a is a diagram showing the state when the webbing is not attached, and FIG. 7b is a diagram showing the state when the webbing is attached. Figure 7c is a diagram showing the state when the webbing is pulled out from the winding force reduction position, Figure 7e is a diagram showing the state when the webbing is pulled out from the winding force reduction position, and Figure 7e is a diagram showing the state when the webbing is pulled out from the winding force reduction position. FIG. 7f is a diagram showing the state when the webbing is removed from the winding force reduction position to the maximum storage position, FIG. 8 is a sectional view showing the main parts of the modified example, Figure 9 is the 8th
FIG. W...Webbing, 1... Winding device main body, 2...
...Side plate (case), 6... Winding shaft for webbing winding, 8... Ratchet wheel, 8a... Teeth, 9
...Small spring, 10...Large spring, 12...Control plate, 12c, 12e...Cam surface, 12
d...Cam groove, 30...Lock lever, 40...
Lock arm, 40a... tip.

Claims

[Claims for Utility Model Registration] 1. A winding shaft for webbing winding that is rotatably supported by the case of the winding device body, and a winding shaft that is rotatably supported by the winding shaft and that the rotation of the winding shaft is a ratchet wheel connected to the take-up shaft so as to transmit the information, a small spring with a small biasing force that biases the take-up shaft in the webbing winding direction, and a small spring that biases the ratchet wheel in the webbing winding direction. At least the urging force of the large spring acts on the take-up shaft when the webbing is retracted, and when the rotation of the ratchet wheel is stopped when the webbing is attached, the small A seat belt retractor configured such that only the biasing force of a spring acts on the retracting shaft in the webbing retracting direction, comprising: a control plate connected to the retracting shaft via a rotation transmission means and a frictional force; a lock lever that assumes a lock position that prevents rotation of the control plate until the webbing is attached, and a lock lever that assumes a lock release position that allows rotation when the webbing is attached; A lock arm is provided, which is rotatable between a first position where the rotation of the edge wheel is locked and a second position where it cannot be engaged, and which rotates toward the first position when the webbing is attached, and a lock arm that rotates toward the first position when the webbing is attached. A cam is provided on the outer periphery of the webbing for preventing the tip of the lock arm from engaging with the teeth of the ratchet wheel from when the webbing is attached until the webbing is pulled out by a certain amount and the control plate is rotated by a certain amount in the direction of pulling out the webbing. and a cam groove that allows the tip to engage the tooth when the control plate rotates the predetermined amount and stores this position as a winding force reduction position. Seatbelt retractor. 2. On the outer periphery of the control plate, the tip of the lock arm engages with the teeth of the ratchet wheel while the control plate rotates within a predetermined storage range from the take-up force reduction position in the webbing pull-out direction. The seat belt retractor according to claim 1, further comprising a cam surface that prevents the seat belt retractor from moving. 3. The seat belt retractor according to claim 1, wherein the ratchet wheel is connected to the retractor shaft via the small spring. 4. The rotation transmission means is a reduction gear system that transmits the rotation of the take-up shaft at a predetermined reduction ratio, and the output gear of the gear system and the control plate are connected via a friction spring. The seat belt retractor according to claim 1.