A latch system fixing device

Abstract

The invention relates to an LATCH system fixing device which comprises a main frame, a shell, a fixing hook and a push button. The shell is arranged on the main frame, an opening allowing a berth shaft to be clamped in is formed in the front end of the shell, the middle of the fixing hook is connected to the main frame in the shell through a fixing hook shaft, the push button is arranged at the rear end of the shell, the front portion of the fixing hook and the rear portion of the fixing hook are provided with a front hook body and a rear hook body corresponding to the opening and the push button respectively, a sliding block supported on the main frame in a sliding mode is arranged in the shell, the fixing hook is connected with the sliding block through a clamping spring staggered with the fixing hook shaft in the extension direction, a bayonet for clamping the berth shaft is formed between the front portion of the sliding block and the front hook body of the fixing hook, a tight ejecting groove in the front-and-back direction of the shell is formed in the sliding block, the push button is connected with the tight ejecting groove through a tight ejecting shaft in a penetrating mode to be connected with the sliding block, the tight ejecting shaft is connected with the sliding block through a tight ejecting spring, the tight ejecting shaft tightly butts against the bottom end of the rear hook body of the fixing hook, and the upper end and / or the rear end of the rear hook body of the fixing hook, back to the push button, undergo or undergoes smooth transition and tightly butt or butts against the push button. The LATCH system fixing device is simple in structure, convenient to use, stable, safe, long in service life and suitable for an LATCH system.

Description

technical field [0001] The invention relates to a child restraint system fixing device, in particular to a child restraint system LATCH system fixing device. Background technique [0002] LATCH is the abbreviation of "Lower Anchors and Tethers for Children". The Chinese translation is "the lower fasteners and tethers used by children". Since September 1, 2002, the United States has stipulated that almost all types of cars must provide child safety seat fixation of the LATCH system. Way. The biggest difference between LATCH and the European standard ISOFIX fixing method is that there is one more hook fixing point than ISOFIX. Both LATCH and ISO systems have two lower interfaces. The LATCH interface has one more upper interface above the rear seat, and the LATCH interface is three. hooks and safety straps. [0003] The existing patent number is 200920121196.4, which discloses a connection device for a child safety restraint system. A buckle plate with a bayonet is used to cl...

AI Technical Summary

Problems solved by technology

[0003] The existing patent number is 200920121196.4, which discloses a connection device for a child safety restraint system. A buckle plate with a bayonet is used to clamp the fixed point of the car. The disadvantage of locking and disengaging is that when the pinch plate is not locked, the ejector part is pressed against the pinch plate by the spring, and when the pinch plate is locked, the ejector part is pressed against the notch on the pinch plate by the spring , the spring is always in a compressed state, long-term elastic compression changes the original shape of the spring, the spring is prone to failure, and the service life of the connecting device is short; another example is the connecting device on the ISOFIX interface disclosed in Patent No. 201110308038.1. Under the action of the torsion spring and the pull rod, the claw realizes the locking and disengagement of the car interface respectively

The connection devices used on the above two kinds of ISOFIX are all released by pulling the ejector or the pull rod, and the reaction force of the spring or torsion spring must be overcome, which is laborious and inconvenient to operate.

If it is used in the LATCH system, the seat belt is connected to the non-interface end of the connection device shell, and the ejector or pull rod protrudes from the non-interface end, which affects the use and appearance of the connection device structure. For example, the seat belt is connected to the ejector or pull rod. , when the seat belt is tightened, it is easy to disengage from the fixed point of the car, and it is not suitable for the fixed use of the LATCH system.

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