A webbing winding device includes a spool, a pair of leg plates, a torsion shaft, a first locking mechanism, a second locking mechanism, and a control mechanism. A webbing belt is wound onto the spool. The two leg plates oppose one another in an axial direction of the spool. The torsion shaft is pro
A webbing winding device includes a spool, a pair of leg plates, a torsion shaft, a first locking mechanism, a second locking mechanism, and a control mechanism. A webbing belt is wound onto the spool. The two leg plates oppose one another in an axial direction of the spool. The torsion shaft is provided passing through the spool and deforms when a torque is applied to the spool. The first locking mechanism, at the side of one of the leg plates, restricts rotation of the spool in an unwinding direction. The second locking mechanism, at the side of the other of the leg plates, switches from a lock-release state to a locking state, and restricts rotation of the torsion shaft in the unwinding direction. The control mechanism is provided passing through the spool and causes the second locking mechanism to switch into the locking state.
대표청구항▼
What is claimed is: 1. A webbing winding deice comprising: a spool at which a length direction base end of a long belt-form webbing belt is anchored, the webbing belt being wound, from the base end, onto the spool by rotation of the spool in a winding direction; a frame including a pair of leg plat
What is claimed is: 1. A webbing winding deice comprising: a spool at which a length direction base end of a long belt-form webbing belt is anchored, the webbing belt being wound, from the base end, onto the spool by rotation of the spool in a winding direction; a frame including a pair of leg plates which oppose one another in an axial direction of the spool; a first energy-absorbing member which is provided passing through the spool along the axial direction of the spool, the first energy-absorbing member deforming when a rotation force of at least a certain magnitude is applied to a portion of the first energy-absorbing member joined to the spool; a first locking mechanism which includes a rotor that is integrally joined to the first energy-absorbing member at one of the pair of leg plates and which, in a predetermined condition, restricts rotation of the rotor in an unwinding direction, which is opposite to the winding direction, and indirectly restricts rotation of the spool in the unwinding direction; a second locking mechanism which is disposed at the other of the pair of leg plates and which switches from a lock-release state to a locking state for restricting rotation of the portion of the first energy-absorbing member in the unwinding direction at the other of the pair of leg plates; a control mechanism which is provided passing through the spool along the axial direction of the spool, the control mechanism causing the second locking mechanism to switch into the locking state in accordance with relative rotation between the rotor and the spool; a first switching member which, by moving in a direction of withdrawal from an initial position, alters a state of at least one of the first locking mechanism and the second locking mechanism, and a restriction structure which restricts a return to the initial position of the first switching member that has withdrawn from the initial position, including a support member which supports the first switching member at the initial position from below, and a guide structure which guides the first switching member which is moved by gravity when support provided by the support mechanism is removed in a direction which is inclined relative to a vertical downward direction, and guides the first switching member to a position opposing the support member if the first switching member moves toward the initial position after withdrawing from the initial position. 2. The webbing winding deice of claim 1 wherein, in a state in which rotation of the first energy-absorbing member is restricted by the second locking mechanism, when a rotation force of at least a predetermined magnitude is applied to the spool, a deformation occurs in the first energy-absorbing member between the portion joined to the spool with the first energy-absorbing and a portion that is subject to the rotation restriction by the second locking mechanism. 3. The webbing winding deice of claim 1, further comprising a lock-release mechanism which disables the rotation restriction of the first energy-absorbing member by the second locking mechanism. 4. The webbing winding deice of claim 1, wherein the control mechanism further includes a second energy-absorbing member, one end of which is anchored at the rotor and another end of which is accommodated at an inner side of the spool, the second energy-absorbing member being deformed while being drawn out toward the rotor when the spool relatively rotates in the unwinding direction with respect to the rotor, and switching of the second locking mechanism into the locking state being enabled by the second energy-absorbing member moving toward the rotor. 5. The webbing winding deice of claim 4, wherein the other end of the second energy-absorbing member protrudes from the spool, engages with the second locking mechanism and maintains the second locking mechanism in the lock-release state, the engagement of the other end with the second locking mechanism being released by the other end being drawn into the spool, for enabling switching of the second locking mechanism into the locking state. 6. The webbing winding deice of claim 4, wherein the second energy-absorbing member comprises a wire. 7. The webbing winding deice of claim 1, wherein the restriction structure comprises a restriction member which opposes, at the initial position, the first switching member that has withdrawn from the initial position, abuts against the first switching member if the first switching member acts to move toward the initial position, and blocks a return of the first switching member to the initial position. 8. The webbing winding deice of claim 1, further comprising: a blocking member which is provided standing at a side of the first switching member that is at the initial position, abuts against the first switching member, and blocks movement of the first switching member in the direction of withdrawal from the initial position; and a clearance cavity which is provided sideward of a path of movement of the first switching member in the direction of withdrawal from the initial position, accommodates the blocking member when the blocking member is detached from a standing direction base end side thereof and falls, and allows the blocking member to be cleared from the movement path. 9. The webbing winding deice of claim 8, wherein an outer diametric dimension of the blocking member is set smaller than a size of the clearance cavity along the standing direction of the blocking member. 10. The webbing winding deice of claim 1, wherein the first energy-absorbing member comprises a torsion shaft.
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이 특허에 인용된 특허 (7)
Fohl Artur (Schorndorf DEX), Belt retractor with an integrated belt pretensioner and an energy converter.
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