Auxiliary securely holding device for electronic appliance

An electronic device holder comprising:

• a holding unit disposed on each of two sides thereof, and a connection member that connects the two holding units;
• an electronic device is held tightly and stably by stopping and clipping of the two holding units;
• wherein a depressed area is arranged at each of the two holding units so as to form a securing step due to a height difference between the depressed area and a top surface of the holding unit;
• the connection member that connects the two holding units on two sides includes a length adjustment unit for changing distance between the two holding units;
• the connection member includes at least a first rod part and a second rod part, each of which has one end sleeved with each other while the length adjustment unit is disposed within the first rod part and the second rod part;
• the length adjustment unit includes a pressing part that extends out of a tube wall of the first rod part and has elasticity to be pressed, an auxiliary drive part being pushed by the pressing part, and a location part moved along with the auxiliary drive part to be mounted into a tube wall of the second rod part, and an elastic part arranged between the first rod part and the second rod part;
• the pressing part having a first elastic element disposed between the tube wall of the first rod part and the pressing part and along the pressed direction, a first slanting surface on one side thereof and facing the auxiliary drive part;
• the auxiliary drive part includes a first leaning surface arranged on one side and corresponding to the first slanting surface of the pressing part and a second slanting surface disposed on the other side thereof;
• the location part includes a second leaning surface corresponding to the second slanting surface of the auxiliary drive part, a tenon that extends out of the tube wall of the first rod part to be locked with one of a plurality of locating holes on the tube wall of the second rod part, and a second elastic element arranged at one side of the location part opposite to the tenon and located between the tube wall of the first rod part and the location part;
• and
• when the elastic part arranged between the first rod part and the second rod part is not compressed, distance between the first rod part and the second rod part is the maximum after the first rod part and the second rod part being extended.