Cylidner body structure of pre-tensioning device and method for manufacturing the pre-tensioning device
A technology of pretensioners and cylinders, applied in the direction of belt tighteners, etc., can solve the problems of leaving scars and damaging the inner peripheral surface of the cylinder 1b, and achieves the effect of easy manufacture
Inactive Publication Date: 2011-07-13
KK TOKAI RIKA DENKI SEISAKUSHO
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Problems solved by technology
In addition, it is necessary to provide a process of inserting the reinforcing guide member into the cylinder body 1b before processing the end portion 13a1, and inserting the reinforcing guide member from the seat belt buckle 2b side after the processing. The opening at the end of the pretensioner is drawn out, thus becoming a limitation on the manufacture of the pretensioner 1
In addition, in the case of inserting the reinforcement guide member into the cylinder 1b in this way, the Image 6 The inner peripheral surface of the cylinder 1b may be damaged or scratches may be left on the inner peripheral surface of the cylinder 1b by the reinforcing guide member.
Method used
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[0033] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, in this embodiment, except for the parts described below, it also has the same structure and performance as the seat belt device 2 and the pretensioner 1 described in the background art, and the same symbols are assigned to the common parts, and omit its description.
[0034] The pretensioner 1 in this embodiment is installed in the vehicle interior, and the seat belt buckle 2b is retracted (pulled) by the piston 12 as a moving body inserted into the cylinder 1b, and the seat belt device 2 The webbing 2a (seat belt) restrains the occupants of the vehicle (see Figure 4 ).
[0035] Such as figure 1 As shown, the cylinder 1b has: a cylindrical portion in which the piston 12 can slide; and an end portion 13a located on the opposite side to the seat belt buckle 2b. A pair of notch parts 13c, 13c facing each other are formed in this end part 13a.
[0036] A...
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The present invention provides a cylinder structure of a pre-tensioning device and a method for manufacturing the pre-tensioning device. The pre-tensioning device is loaded in the vehicle, socket with the belt buckle of the armchair safety belt through a piston (12) inserted in the cylinder (1b), and then the armchair safety belt binds up the riding personnel. A pair of mutual contraposition incisions (13c, 13c) are formed on the end (13a) of the side opposite to the belt buckle of the armchair safety belt on the cylinder (1b). The opening of the cylinder end is partly blocked by bending a pair of residual tongue sections (13b, 13b) without being cut on the end (13a) towards the internal of the cylinder (1b).
Description
technical field [0001] The present invention relates to a cylinder structure of a pretensioner and a method of manufacturing the pretensioner having the cylinder structure. The pretensioner is mounted on a vehicle and imparts tension through a piston inserted into the cylinder. The seat belt is used to restrain the occupant with the seat belt. Specifically, the present invention relates to a method of applying tension to a seat belt through a piston slidably inserted into the cylinder by utilizing the air pressure generated in an emergency such as when a vehicle collides. A cylinder structure of a pretensioner restraining an occupant and a method of manufacturing the pretensioner having the cylinder structure. Background technique [0002] Conventionally, vehicles such as automobiles are provided with seat belt devices for restraining the occupants in order to protect the occupants in an emergency such as when the vehicle collides. [0003] Such a seat belt device is provi...
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IPC IPC(8): B60R22/46
Inventor 浮田优室町哲史
Owner KK TOKAI RIKA DENKI SEISAKUSHO