Access hole panel structure capable of preventing negative pressure loosening

Abstract

The invention provides an access hole panel structure capable of preventing negative pressure loosening, and relates to the technical field of decoration design. The access hole panel structure capable of preventing negative pressure loosening comprises a ceiling plate, an access cover plate, a sliding rail frame and a locking device, wherein the sliding rail frame is arranged above the ceiling plate, the locking device is arranged above the access cover plate, the locking device is in sliding connection with the sliding rail frame, the locking device comprises a shell and a pressing block, a sliding rail is arranged on the sliding rail frame, and the shell and the pressing block are located on the two sides of the sliding rail frame. The access hole panel structure is simple to operate, rapid to assemble and install, free of grooving in the ceiling plate on site, stable in structure, free of shaking after being locked, smooth in closing between the surface of the access hole panel and the surface of the ceiling plate, better in attractiveness and capable of effectively preventing the access hole panel from loosening caused by negative pressure.

Description

technical field [0001] The invention relates to the technical field of decoration design, [0002] More particularly, the present invention relates to a service hatch panel structure that prevents loosening by negative pressure. Background technique [0003] At this stage, there are basically two types of access openings on the top surface of the house, one is the detachment type; the other is the modular clamshell type. The first type of access cover is vulnerable to damage, and the second type is a rear-mounted access type access port. Although the problem of the first type of detachable access port is easily damaged, there are hidden Problems with poor performance, and the flip-up access opening requires a lot of headroom. When the pressure of the indoor space is greater than the pressure inside the cavity at the top of the suspended ceiling, a negative pressure phenomenon will appear to push the top inspection port plate upward. For example, Chinese patent CN112282176...

AI Technical Summary

Problems solved by technology

[0004] However, the locking mechanism needs to make grooves on the side of the ceiling board. It is difficult to make grooves on the side of the thin ceiling board, and it will reduce the strength of the ceiling board. Under the condition of large local stress, the lock tongue is easy to cause damage to the ceiling panel, and in order to facilitate the lock tongue to enter the slot on the side of the ceiling panel smoothly, the thickness of the slot must be greater than the thickness of the lock tongue. The easier it is for the tongue to enter the slot to complete the locking step, but the larger the gap, the greater the shaking between the inspection hatch cover and the ceiling panel in the locked state, which will cause the inspection hatch cover and the ceiling panel to be in a static state. The surface is uneven. Under negative pressure, the gap between the inspection hatch cover and the ceiling plate will give the inspection hatch cover a certain shaking space. Under negative pressure, the inspection hatch cover and the lock tongue will continue to collide with the ceiling panel. Abnormal noise

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