Electronic measuring, conditioning and regulating instrument and corresponding panel assembly method

Abstract

Electronic measuring, conditioning and regulating instrument, including a display front-piece having at least a front mask equipped at the rear with lateral walls, where on the front mask there are at least two through holes for the insertion of respective attachment elements, each of the attachment elements including a screw element having a head and a shaft, a helical thread being made on the shaft that develops for not more than 180° on the circumference of the shaft.

1 . Electronic measuring, conditioning and regulating instrument, comprising a display front-piece having at least a front mask equipped at a rear with lateral walls, wherein on said front mask there are at least two through holes for insertion of respective attachment elements, each of said attachment elements comprising a screw element having a head and a shaft, a helical thread being made on the shaft that develops for not more than 180° on the a circumference of the shaft. 
     
     
         2 . Electronic instrument as in  claim 1 , wherein an empty space is provided between a beginning of the helical thread and an internal face of the head. 
     
     
         3 . Electronic instrument as in  claim 1 , wherein through holes suitable to receive mating attachment screw elements are provided in at least two opposite points on a perimeter of the front-piece. 
     
     
         4 . Electronic instrument as in  claim 1 , wherein the lateral walls have a respective window, of a size mating with a maximum transverse size of the helical thread. 
     
     
         5 . Electronic instrument as in  claim 1 , wherein said screw element has an angular position for the insertion of the instrument in which said helical thread is completely comprised inside said lateral walls. 
     
     
         6 . Electronic instrument as in  claim 1 , wherein the helical thread has a progressive increase in thickness from an end facing toward a point of the shaft to an end facing toward the head. 
     
     
         7 . Electronic instrument as in  claim 1 , wherein an external face of the head has a notch for using a screwing instrument. 
     
     
         8 . Electronic instrument as in any  claim 1  wherein said helical thread has a cylindrical development. 
     
     
         9 . Electronic instrument as in  claim 1 , wherein said helical thread has a conical development. 
     
     
         10 . Method for assembling an electronic measuring, conditioning and regulating instrument as in  claim 1  on a panel, comprising:
 preparing on said panel a hole having a minimum size sufficient to allow insertion the lateral walls of the front-piece, keeping the front mask protruding from the panel; 
 during the insertion of the front-piece, keeping the screw elements with the respective threads in an internal position with respect to said lateral walls until the front mask abuts against the panel; 
 having reached this position, rotating the screw element making the thread exit from the respective window provided on said lateral walls and taking it to thrust the edge of the panel outside the hole against the internal face of the front mask, in this way clamping the whole instrument onto the panel.