Drug delivery device
A drug delivery device mainly has a housing, which can be easily held and operated. The housing has one end formed with an adjustment seat capable of adjusting a range distance, and the other end connected to a gas pressure control source for providing mainstream and substream gas pressures. Disposed in the housing are a drug delivery pressuring tube, an embedded drug-can connecting seat or an external drug-can connecting seat, a replaceable drug-can container and a gas communication tube. According to this design, the minor liquid drug can be controlled, the drug-can can be replaced and the continuous quantitative injection of drug can be made. Also, all damaged or dirty members of the invention may be disassembled, cleaned or replaced.
1. 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 ).
2. The drug delivery device ( 1 ) of claim 1 , wherein the base ( 10 ) further has:
two depressions ( 103 ), being oppositely formed on the edge of the front end of the accommodating space;
two through holes ( 107 ), being formed on the end-face of the front end of the base ( 10 ); and
two lugs ( 100 ), being formed on the inner surface of the accommodating space and opposite to each other, wherein the lug ( 100 ) is adjacent to the sliding slot ( 106 ).
3. The drug delivery device ( 1 ) of claim 2 , wherein the front sliding cover ( 11 ) further has:
two protrusions ( 112 ), being oppositely formed on both sides of the opening of the front sliding cover ( 11 ) for matching the two depressions ( 103 ) when the base ( 10 ) is covered with the front sliding cover ( 11 );
a hole seat ( 114 ), being disposed on the inner surface of the front end of the front sliding cover ( 11 );
two base posts ( 117 ), being oppositely disposed on inner surface of the front sliding cover ( 11 ) for locating the drug delivery tube ( 30 ) when the drug delivery tube ( 30 ) is disposed in the accommodating space of the base ( 10 ); and
a slip-resistant emboss ( 113 ), being formed on the outer surface of the front sliding cover ( 11 ).
4. The drug delivery device ( 1 ) of claim 2 , wherein a transversal wing ( 432 ) and a longitudinal protrusion ( 433 ) are formed on the gas communication tube ( 43 ).
5. The drug delivery device ( 1 ) of claim 4 , wherein the rear sliding cover ( 12 ) further has:
a notch ( 124 ), being formed on the rear end of the rear sliding cover ( 12 ) for allowing the gas communication tube ( 43 ) to be moved;
a slip-resistance emboss ( 122 ), being formed on the outer surface of the rear sliding cover ( 12 ); and
a stopper ( 123 ), being formed on the inner surface of the rear sliding cover ( 12 ), for pushing the transversal wing ( 432 ) when the tip portion ( 431 ) is penetrated through the slotted plug ( 423 ), such that the plug ( 423 ) would be completely run through.
6. The drug delivery device ( 1 ) of claim 1 , wherein the drug delivery tube ( 30 ) further comprises an auxiliary positioning hole ( 35 ) adjacent to the connection portion ( 32 ).
7. The drug delivery device ( 1 ) of claim 6 , wherein a circular protrusion ( 401 ) is disposed on the bottom of the connecting seat ( 40 ) for being inserted into the auxiliary positioning hole ( 35 ) of the drug delivery pressuring tube ( 30 ).
8. The drug delivery device ( 1 ) of claim 3 , wherein the adjustment seat ( 20 ) has at least one elastic hook ( 21 ) for being correspondingly inserted into the hole seat ( 114 ) of the front sliding cover ( 11 ) and at least one inserting rod ( 22 ) for being correspondingly inserted into the through hole ( 107 ) of the base ( 10 ); such that the gap between the adjustment seat ( 20 ) and the housing would be adjusted by the disposing of the elastic hook ( 21 ) being inserted into the hole seat ( 114 ).
9. The drug delivery device ( 1 ) of claim 4 , wherein the fixed connection seat ( 50 ) further has:
a notch ( 521 ), being formed on the secondary-stream gas hole ( 52 ) for allowing the longitudinal protrusion ( 433 ) to be moved, and preventing the gas communication tube ( 43 ) from being rotated; and
two joining portions ( 53 ), being respectively disposed on both sides of the notch ( 521 ), wherein when the fixed connection seat ( 50 ) is connected to the base ( 10 ), the two joining portion ( 53 ) would be correspondingly and respectively fixed on the two lugs ( 100 ) of the base ( 10 ).
10. The drug delivery device ( 1 ) of claim 4 , wherein the rear-mount seat ( 60 ) further has:
a V-shaped joining portion ( 62 ), being formed on the through hole ( 61 ) for providing the secondary-stream gas pressure ( 71 ) to be conveniently inputted; and
two screw holes ( 63 ), being formed on the periphery of the rear-mount seat ( 60 ), and used for facilitating the rear-mount seat ( 60 ) be fixed on the connection seat ( 50 ).
11. The drug delivery device ( 1 ) of claim 1 , wherein the primary-stream gas pressure ( 70 ) is ranged from 5 kg/cm2 to 12 kg/cm2, and the secondary-stream gas pressure ( 71 ) is ranged from 0.02 kg/cm2 to 0.1 kg/cm2.
12. The drug delivery device ( 1 ) of claim 1 , wherein a shallow slot ( 424 ) is formed on the surface of the plug ( 423 ) for reducing the residual amount of the drug by way of surface tension.
13. The drug delivery device ( 1 ) of claim 1 , wherein a pressure-reducing chamber is formed by a thin slot in the gas communication tube ( 43 ), and two diameter-reduced openings are formed at the inlet and outlet of the of the gas communication tube ( 43 ).