fig1 shows an ecg device 1 embodied as a portable handheld device , including a housing 2 , on the outer side of which ecg sensors ( not visible in fig1 ) are arranged in a sensor region 3 . the ecg sensors are fastened to the ecg device 1 by means of a flexible holding pad 4 which is pulled over the lateral edges of the housing 2 . a handle 5 which is connected to the housing 2 is arranged on the rear side of the ecg device 1 facing away from the sensor region 3 . an operating button 7 and a display apparatus 8 , e . g . in the form of a display , are integrated into the handle 5 . moreover , a switch 6 serving to switch the ecg device 1 on and off is situated on the rear side of the housing 2 . the ecg device 1 moreover includes a connector for an external sensor pad 9 . the external sensor pad 9 can be connected to the ecg device 1 by means of a connection cable 10 and a plug - in connector 11 . when not in use , the external sensor pad 9 can be latched onto , or clipped into , the housing 2 using corresponding latching means . by way of example , the external sensor pad 9 can be embodied as the aforementioned satellite electrode arrangement or the external ecg sensor described above . fig2 shows the ecg device 1 in accordance with fig1 in a different view , likewise from the rear side . in the illustration in accordance with fig2 , the external sensor pad 9 has been taken off the housing 2 . it is possible to identify that ecg sensors are arranged on the external sensor pad 9 , for example six ecg sensors which are embodied as capacitive electrodes like the ecg sensors of the ecg device 1 . the ecg sensors 13 are likewise fastened to the housing of the sensor pad 9 by means of a holding pad . the explanations below in respect of the holding pad 4 of the ecg device 1 and the ecg sensors thereof , as well as the attachment thereof , apply analogously to the external sensor pad 9 as well . in fig2 , it is also possible to identify that the ecg device 1 includes electrical contacts 12 on a housing side on which the handle 5 merges into the housing 2 . the electrical contacts 12 serve to connect the ecg device 1 to a charge device in order to charge a rechargeable battery present in the ecg device 1 for power supply purposes . by way of example , the ecg device 1 can be placed into a suitably shaped charge station leading with the contacts 12 . fig3 shows the ecg device 1 with the external sensor pad 9 fastened thereto , in a view onto the sensor region 3 such that the holding pad 4 with fastening points 40 , provided thereon , for the ecg sensors is visible . in fig3 , the holding pad 4 is still depicted without ecg sensors fastened thereto , and so the interior of the fastening points 40 can also be seen . by way of example , provision is made for 5 × 5 = 25 fastening points 40 for 25 ecg sensors . each fastening point 40 includes a receptacle space 41 with a receptacle frame 43 , into which an ecg sensor can be placed . in the respective receptacle space 41 , the holding pad 4 includes a passage opening 42 , through which electric lines of the ecg sensor are guided . fig4 shows a view of the ecg device 1 , once again from the side of the sensor region 3 but with the external sensor pad 9 taken off . what can be seen is that a receptacle region 13 is present for receiving the sensor pad 9 on the housing 2 of the ecg device 1 . it is possible to identify latching lugs 14 , 15 at the housing 2 , into which the external sensor pad 9 can be latched . in accordance with fig4 , the holding pad 4 is moreover depicted with ecg sensors 20 arranged at the fastening points 40 . the ecg sensors 20 lie substantially flush with the upper side of the fastening points 40 embodied in a mesa - like manner , and so an even surface results . fig5 shows , in an exploded illustration , the design of the ecg device in a side view . it is possible to identify five ecg sensors 20 , which each include a front - side sensor platelet 21 , a holding body 24 for receiving the sensor platelet 21 and a cup - shaped sensor housing 25 . the sensor platelets 21 each have electric lines 22 , 23 , which serve for electric contacting of the respective sensors 20 . the sensor platelets 21 consist of electrically conducting material or include a layer made of such material , e . g . metal . on their outwardly pointing sides , the sensor platelets 21 are insulated , e . g . by a lacquer layer . the sensors 20 are embodied in the form of capacitive electrodes and can be designed as described in e . g . wo 2012 / 019760 a1 . the ecg sensors 20 assembled in this manner are inserted into the receptacle frames 43 and are held therein , e . g . by an interlock or due to a latching connection . as can be identified in fig5 , the holding pad 4 moreover includes , respectively at the side of a fastening point 40 facing away from the receptacle space 41 , respective projections 44 which serve for holding and centering compression springs 50 in each case . the compression springs 50 can be preassembled on an outer wall of a housing component 51 of the housing 2 pointing toward the sensor region 3 . fig5 moreover shows a layer 30 made of elastic damping material which is arranged between the housing component 51 and the holding pad 4 . by way of example , the layer 30 can be embodied as a foam block or latex block . the layer 30 includes passage openings 31 , through which the springs 50 are guided . furthermore , it is possible to identify that an electric printed circuit board 52 with electronic components is arranged in the housing 2 , to be precise between the housing component 51 and a housing component 53 . the electric printed circuit board 52 includes an evaluation circuit for evaluating the ecg signals received by the ecg sensors 20 and for forwarding the signals to an external visualization and storage apparatus . fig6 shows the components explained on the basis of fig5 in the assembled state , i . e . the complete ecg device 1 in a sectional illustration . moreover , it is possible to identify , in particular on the basis of the detailed illustration in fig6 a , that each fastening point 40 may include sealing means 46 which are configured for sealing the passage opening 42 in a liquid - tight manner . the seal is effected by inserting an ecg sensor 20 into the receptacle space 41 . the sensor 20 then comes to rest on the sealing means 46 and thereby brings about the liquid - tight seal of the passage opening 42 . furthermore , it is possible to identify in fig6 a that a receptacle space 41 may include lugs 45 , by means of which a sensor 20 is held in the receptacle space 41 in the style of a latching connection , at the inner wall , for example the inner wall of the receptacle frame 43 . fig7 shows the ecg device 1 in a section , wherein the display apparatus 8 in particular is depicted with further details . as is possible to identify , graphic display information , e . g . in the form of arrows 80 , 81 , can be depicted on the display apparatus 8 , by means of which a user is instructed to position the ecg device 1 correctly on a patient .
an ecg device designed as a portable hand - held device , comprising a housing , on the outer face of which a plurality of ecg sensors in the form of capacitive electrodes is arranged in a sensor region , characterized by the following features : the egg device has at least one flexible retaining mat in the sensor region , which retaining mat is designed to retain at least some or all ecg sensors , the retaining mat is made of liquid - tight material , at least some or all ecg sensors are fastened to the outer face of the retaining mat facing away from the housing .