Drug delivery device

A drug delivery device (1), comprising:

• a housing, comprising:
• a base (10), having an accommodating space, wherein a rib (108) is formed on a bottom surface of the accommodating space, and two longitudinal slots (101), two elastic hooks (109), two locks (104) being disposed on the middle section of two inner sidewalls of the accommodating space;
• moreover, each of the locks (104) being provided with a tab (105) thereon, and the tab (105) is formed with two sliding slots (106) thereunder;
• a front sliding cover (11), having two engaging portions (110) and two circle posts (111) on two inner sidewalls of a rear opening thereof;
• wherein the two circle posts (111) are respectively embedded into the two longitudinal slots (101) of the base (10), such that the front sliding cover (11) connected to the base (10) is able to cover the base (10) slidably;
• moreover, the front sliding cover (11) is connected to the base (10) by the two elastic hooks (109) being hooked on the two engaging portions (110);
• and
• a rear sliding cover (12), having two hooking portions (121) on two inner sidewalls thereof, wherein the rear sliding cover (12) is connected to the base (10) by the two hooking portions (121), and the rear sliding cover (12) being able to slidably cover the base (10) when the two hooking portions (121) sliding on the two sliding slots (106) and then hooked on the two locks (104);
• a drug delivery pressuring tube (30), being disposed in the accommodating space of the base (10), and comprising:
• an inner hole (31), being formed in the drug delivery pressuring tube (30) and a diameter-reduced channel is formed from the inner hole (31) to the center of the drug delivery pressuring tube (30);
• a connection portion (32), being disposed on the middle section of the outer circumferential surface of the drug delivery pressuring tube (30), and having a penetrated channel (33) for communicating with the inner hole (31);
• and
• a positioning groove (34), being disposed on the outer surface of the bottom of the drug delivery pressuring tube (30) for combining with the rib (108), such that the drug delivery pressuring tube (30) would be fixed onto the bottom surface of the accommodating space of the base (10);
• a connecting seat (40), having a hole (402) and a channel (41) for making the connecting seat (40) be disposed on the drug delivery pressuring tube (30), so as to combine with the connection portion (32) of the drug delivery pressuring tube (30);
• a drug container (42), being formed with a diameter-reduced inserting portion (420) on the front end thereof, wherein the drug container (42) is combined with the connecting seat (40) by inserting the diameter-reduced inserting portion (420) into the hole (402) and connecting the diameter-reduced inserting portion (420) to the channel (41);
• moreover, the drug container (42) further comprising a fitting portion (422) on the rear end thereof, and a slotted plug (423) is disposed in the fitting portion (422);
• a gas communication tube (43), having a tip portion (431) for being penetrated through the slotted plug (423) of the drug container (42);
• a fixed connection seat (50), having a primary-stream gas hole (51) and secondary-stream gas hole (52), wherein the secondary-stream gas hole (52) is connected to the rear end of the gas communication tube (43);
• a rear-mount seat (60), having a through hole 61, wherein the rear-mount seat (60) is combined with the fixed connection seat (50) through the through hole (61) being combined with the primary-stream gas hole (51);
• and
• an adjustment seat (20), being combined with the front end of the housing constituted by the base (10), the front sliding cover (11) and the rear sliding cover (12), wherein the adjustment seat (20) is a triangular inserting member, and the gap between the adjustment seat (20) and the housing is adjustable;
• wherein the primary-stream gas hole (51) and the secondary-stream gas hole (52) are respectively connected to two conduits (72), such that a drug in the drug container (42) can be atomized through a primary-stream gas pressure (70) and a secondary-stream gas pressure (71) delivered by using the two conduits (72);
• such that the drug would be entered into the inner hole (31) of the drug delivery pressuring tube (30) through the hole (402) and the channel (41) by the driving force of the secondary-stream gas pressure (71), and then quantitatively ejected from The drug delivery device (1) in an atomization form by the driving force of the primary-stream gas pressure (70).