Hole plugs

Abstract

A hole plug for closing a through-hole formed in a compartment wall may include an attaching portion formed from a synthetic resin and a cover portion integrated with the attaching portion at a central portion thereof. The attaching portion can be inserted into the through-hole so as to engage the inner surface of the compartment wall. The cover portion has a size and shape that can enclose the through-hole and has a peripheral edge portion that can closely contact the outer surface of the compartment wall. The cover portion has a thickened portion that is formed in the peripheral edge portion thereof or in a vicinity of the peripheral edge portion and that can maintain a size and configuration of the peripheral edge portion when an external force is applied to the cover portion. The cover portion has a thinned portion that is formed between the thickened portion and the central portion integrated with the attaching portion and that can undergo elastic buckling deformation when an external force is applied thereto.

1 . A hole plug for closing a through-hole formed in a compartment wall, comprising: 
 an attaching portion formed from a synthetic resin, the attaching portion can be inserted into the through-hole so as to engage one surface of the compartment wall; and    a cover portion integrated with the attaching portion at a central portion thereof, the cover portion having a size and shape that can enclose the through-hole and having a peripheral edge portion that can closely contact the other surface of the compartment wall,    wherein the cover portion has a configuration maintaining means that is formed in the peripheral edge portion thereof or in a vicinity of the peripheral edge portion and that can maintain a size and configuration of the peripheral edge portion when an external force is applied to the cover portion, and wherein the cover portion has an elastic force imparting means that is formed between the configuration maintaining means and the central portion integrated with the attaching portion and that can undergo elastic buckling deformation when the external force is applied thereto, the peripheral edge portion of the cover portion being capable to closely contact the other surface of the compartment wall by means of the elastic force imparting means.    
     
     
         2 . The hole plug according to  claim 1 , wherein the cover portion is formed of elastomer, and wherein a portion formed with the configuration maintaining means has a thickness greater than a portion formed with the elastic force imparting means.  
     
     
         3 . A hole plug according to  claim 2 , wherein the thickened portion formed of elastomer and formed with the configuration maintaining means has a double seal structure having a V-shaped cross-sectional configuration.