JPH02128668U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a webbing retractor according to a first embodiment of the present invention, FIG. 2 is a schematic overall side view of an automatic seat belt device to which the webbing retractor of the embodiment is applied, and FIG. The figure is a sectional view showing a part of the locking mechanism of the webbing retractor according to the first embodiment, and FIG. 4 is a front view of the acceleration sensor.
FIG. 5 is a front view showing the installed state of the spool release lever, FIGS. 6 and 7 are schematic side views showing the relationship between the cam plate and the friction spring according to the first embodiment, and FIG. A schematic side view showing the relationship between a cam plate and a friction spring according to a modification of the webbing take-up device of the embodiment,
FIG. 9 is an exploded perspective view of essential parts of a webbing retractor according to a second embodiment of the present invention, and FIGS. 10 and 11 are schematic diagrams showing the relationship between a cam member and a friction spring according to the second embodiment. FIG. 10, 26... webbing winding device, 16...
Webbing, 32... Winding shaft, 48... Main gear, 48A... Claw portion, 50... Lock claw, 52...
... Lock bar, 56 ... Wire spring, 58 ... Inner gear wheel, 58B ... Uneven part, 60 ... Cam plate, 60A ... Cam part, 62 ... Drive disk, 63 ... Friction spring, 6
3A... Protrusion, 63B... Operating part, 65... Cam, 68... Pole, 74... Lock wheel, 78...
Acceleration sensor, 130... webbing retractor,
132...Bending portion, 134...Cam member, 136
...Arm.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A ratchet wheel coaxially fixed to the webbing take-up shaft, a lock pawl that engages with the ratchet wheel to prevent the webbing take-up shaft from rotating in the webbing pull-out direction, and the webbing. An inner gear wheel is arranged coaxially and relatively rotatably with the winding shaft, and has a concave and convex line arranged in a circumferential direction on its outer circumferential surface, and a protrusion that fits into the concave and convex lines arranged in a line on the inner gear wheel. A friction spring that is formed and wrapped around the outer circumferential surface of the inner gear wheel under pressure due to its own spring properties and rotates together with the inner gear wheel to operate the lock pawl, and a friction spring that is coaxial with and capable of relative rotation to the webbing take-up shaft. a cam plate formed with a cam portion that is arranged and rotated by an operation of a passenger to engage a protrusion of a friction spring and release the engagement between the protrusion and the unevenness arranged in a row on the inner gear wheel; An acceleration sensor that detects an emergency state of the vehicle and activates, and a differential wheel that normally rotates following the rotation of the webbing take-up shaft and causes a rotation delay with respect to the webbing take-up shaft due to the activation of the acceleration sensor. , an interlocking means that is operated by a rotation delay of the differential wheel, connects the webbing take-up shaft and the inner gear wheel, and rotates the inner gear wheel in accordance with the rotation of the webbing take-up shaft in the webbing pull-out direction; A webbing retractor equipped with (2) a ratchet wheel coaxially fixed to the webbing take-up shaft; a lock pawl that engages with the ratchet wheel to prevent rotation of the webbing take-up shaft in the webbing pull-out direction; and a lock pawl coaxially fixed to the webbing take-up shaft; The inner gear wheel is arranged so as to be relatively rotatable and has concavities and convexities lined up along the circumferential direction on its outer circumferential surface, and protrusions that fit into the concavities and convexities lined up on the inner gear wheel are formed so that the inner gear wheel has its own spring property. A friction spring is wrapped under pressure around the outer circumferential surface of the gear wheel and rotates together with the inner gear wheel to operate the locking pawl.The protrusion of the friction spring is normally arranged rotatably on the outside of the friction spring. The friction spring is pressed in the direction of fitting into the concavities and convexities arranged in a row on the inner gear wheel, and rotates and engages with the friction spring by the operation of the passenger, thereby causing the protrusions to fit into the concavities and convexities of the inner gear wheel. A cam member to be released, an acceleration sensor that operates by sensing the emergency state of the vehicle, and a cam member that normally rotates following the rotation of the webbing take-up shaft, and rotates relative to the webbing take-up shaft due to the operation of the acceleration sensor. It is operated by the differential wheel that causes a delay and the rotation delay of the differential wheel, and connects the webbing take-up shaft and the inner gear wheel, so that the inner gear wheel follows the rotation of the webbing take-up shaft in the webbing pulling direction. A webbing retractor comprising: an interlocking means for rotating; and a webbing retractor.