Latch Device

Abstract

A latch device comprises a housing unit, a disk unit, an electromagnetic lock unit, a pressing lock unit, and a detecting unit. The housing unit includes a housing, which has a pressing hole and an insertion slot. The disk unit includes a supporting rod positioned through the housing, and two vertical disks pivotally arranged to the supporting rod. The outer perimeter of the two disks is placed with a hook, a first engaging portion and a second engaging portion. The electromagnetic lock unit includes two electromagnetic mechanisms, two retractable bars connected to the two electromagnetic mechanisms, and two electromagnetic latches respectively connected to the two retractable bars. The pressing lock unit includes a pushbutton, and a button latch connected to the pushbutton. The detecting unit includes two detectors, which are disposed inside the housing for detecting the position of the two electromagnetic latches.

What is claimed is: 
     
         1 . A latch device, applied to selectively secure a latch plate device, wherein comprises a latch plate with two latching holes, comprising:
 a housing unit, including a housing, which has a pressing hole and an insertion slot;   a disk unit, including a supporting rod positioned through the housing, and two vertical disks pivotally arranged to the supporting rod, around an outer perimeter of the two vertical disks being placed with a hook, a first engaging portion and a second engaging portion;   an electromagnetic lock unit, including two electromagnetic mechanisms fixed arranged inside the housing, two retractable bars respectively connected to the two electromagnetic mechanisms, and two electromagnetic latches respectively connected to the two retractable bars;   a pressing lock unit, including a press button slidingly connected to the press hole, and a button latch connected to the press button;   a detecting unit, including two detectors, which are disposed inside the housing for detecting the position of the two electromagnetic latches; wherein the two vertical disks can be moved between an unlatched position and a latched position, and when the two vertical disks are on the unlatched position, the latch plate can be inserted from the insertion slot and push the two vertical disks to the latched position; when the two vertical disks are on the latched position, the two electromagnetic latches are respectively latched with the two first engaging portions, and the button latch is concurrently latched with the two second engaging portions, so that the two vertical disks cannot either move or interfere respectively with the two latching holes, and the latch plate device can be secured to the latch device.   
     
     
         2 . The latch device as claimed in  claim 1 , further includes an illuminating unit, wherein an illuminator is disposed inside the housing. 
     
     
         3 . The latch device as claimed in  claim 2 , wherein the disk unit further includes two disk springs for respectively moving the two vertical disks to the unlatched position, and one end of the disk springs are respectively connected to the two vertical disks, and the other ends are connected to the housing. 
     
     
         4 . The latch device as claimed in  claim 3 , wherein the electromagnetic lock unit further includes two electromagnetic lock springs, which respectively enables the two electromagnetic latches to push against the two first engaging portions, and one end of the two electromagnetic lock springs are respectively connected to the two electromagnetic latches, while the other ends are connected to the housing. 
     
     
         5 . The latch device as claimed in  claim 4 , wherein the pressing lock unit further includes two pressing lock springs, which enables the button latch to be pushed against the two second engaging portions, and one end of the two pressing lock springs are connected to the press button, while the other ends are connected to the housing. 
     
     
         6 . The latch device as claimed in  claim 5 , further includes a forcible release unit, wherein a release hole is opened on the press button, and a release for inserting into the release hole to push the two electromagnetic latches and the button latch. 
     
     
         7 . The latch device as claimed in  claim 6 , wherein the housing unit further includes a fixing flange protruding from the bottom of the housing. 
     
     
         8 . The latch device as claimed in  claim 7 , wherein the insertion slot is provided with a wall for framing a guide passage. 
     
     
         9 . The latch device as claimed in  claim 8 , wherein the electromagnetic lock unit further includes an electromagnetic lock guide rod disposed inside the housing, and two electromagnetic channels respectively disposed inside the two electromagnetic latches and positioned through by the electromagnetic lock guide rod. 
     
     
         10 . The latch device as claimed in  claim 9 , wherein the pressing lock unit further includes two pressing lock guide rods disposed inside the housing, and two pressing lock channels disposed on the press button and positioned through by the two pressing lock guide rods.