Automatic injection device with cap

Abstract

To provide a drug delivery device that also automatically shields a needle after use of the device to prevent any unintended contact with the needle.SOLUTION: A drug delivery device (10) includes: a cap (18) comprising an outer portion (20) including a proximal end, a distal end, a side wall, and a plurality of projections (120); and a retainer (160) including a proximal end, a distal end, and a side wall. In the retainer (160), the side wall includes a plurality of removal projections (164), the distal end includes a plurality of wings (170), and the removal projections (164) are configured to remove a rigid needle shield (58) upon axial movement of the outer portion (20) of the cap (18) away from a housing (26,28,46). The wings (170) are configured to engage the projections (120). The engagement between the wings (170) and the projections (120) restricts relative movement between the outer portion (20) and the retainer (160).SELECTED DRAWING: Figure 13A

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates generally to drug delivery devices, and more particularly to automatic injection devices. [Background technology]

[0002] Various types of automatic injection devices have been developed to allow medications and other liquid therapeutic preparations to be administered or self-injected by untrained individuals. Summary of the Invention [Problem to be solved by the invention]

[0003] Generally, these devices include a reservoir prefilled with a liquid therapeutic formulation and some type of automatic needle injection mechanism that can be triggered by the user. Many of these devices, such as auto-injectors, are designed so that a prefilled reservoir, such as a syringe, is assembled to the device during assembly. In addition to automatically deploying the needle injection mechanism, many drug delivery devices also automatically shield the needle after use of the device to prevent any unintentional contact with the needle. [Means for solving the problem]

[0004] In one aspect, a drug delivery device includes a housing, a syringe assembly including a barrel, a stopper, a cannula, and a rigid needle shield that receives at least a portion of the cannula, at least a portion of the syringe assembly being disposed within the housing, a drive assembly configured to move the stopper within the barrel upon actuation of the drive assembly, at least a portion of the drive assembly being disposed within the housing, a cap secured to the housing, the cap including a retainer including a body having an outer portion defining an interior space and a removal projection configured to remove the rigid needle shield upon axial movement of the outer portion of the cap away from the housing, and a needle cover having a pre-use position in which the cannula is disposed within the needle cover, an actuated position in which the drive assembly is actuated, and a post-use position in which the cannula is disposed within the needle cover, the outer portion receiving a portion of the needle cover and configured to prevent movement of the needle cover from the pre-use position to the actuated position.

[0005] The outer portion includes a protrusion received by a cap opening defined by the needle cover, the protrusion on the outer portion configured to engage the needle cover upon movement of the needle cover from the pre-use position to the activated position.

[0006] A portion of the retainer can be received within the interior space of the outer portion, the retainer secured to the outer portion and axially movable relative to the outer portion. The outer portion can include a retention tab received by a retainer opening defined by a body of the retainer, the retention tab disengaging from the body of the retainer when the outer portion is secured to the housing, the retention tab of the outer portion configured to engage with the retainer upon axial movement of the outer portion away from the housing and relative to the retainer. The retainer can include a pair of wings extending radially outward from the body of the retainer, each wing configured to engage with a rib extending radially inward from the body of the outer portion.

[0007] The retention tab may extend radially outward through the retainer opening in the retainer. The retention tab of the outer portion may be secured to the body of the cap via an extension arm, and the retention tab may be movable radially inward via the extension arm. The retainer may include a flange that engages with the outer portion when the outer portion is secured to the housing. The flange of the retainer may be spaced apart from the outer portion upon axial movement of the outer portion away from the housing. The surface of the removal projection may be flat, and the corresponding surface of the rigid needle shield may be flat.

[0008] The body of the retainer may include a first end and a second end disposed opposite the first end, the removal projection extending radially inward from the body of the retainer via a removal arm, the removal arm extending radially inward from the second end to the first end of the body, and the removal projection may be movable relative to the body of the retainer via the removal arm.

[0009] The device may further include a syringe holder disposed within the housing, the syringe holder receiving the syringe assembly, the syringe holder movable relative to the housing, the syringe holder disengaging from the drive assembly when the outer portion is secured to the housing, and the syringe holder engaging the drive assembly upon axial movement of the outer portion away from the housing.

[0010] The surface of the removal projection may be configured to engage a corresponding surface of the rigid needle shield to remove the rigid needle shield upon axial movement of the outer portion of the cap away from the housing, and the surface of the removal projection disengages from the corresponding surface of the rigid needle shield when the outer portion is secured to the housing. The protrusion may be configured such that upon axial movement of the outer portion away from the housing, the surface of the removal projection disengages from the cap opening before engaging the corresponding surface of the rigid needle shield.

[0011] The outer portion may include one of a locking projection and a locking recess, and the housing may include the other of the locking projection and the locking recess, the locking projection being received by the locking recess to secure the outer portion to the housing, and the locking projection being disengaged from the locking recess upon axial movement of the outer portion away from the housing before a surface of the removal projection engages a corresponding surface of the rigid needle shield.

[0012] The device may include one or more of the following aspects, taken individually or according to all technically possible combinations: -The drug delivery device Housing and a syringe assembly including a barrel, a stopper, a cannula, and a rigid needle shield that receives at least a portion of the cannula, at least a portion of the syringe assembly being disposed within the housing; a drive assembly configured to move the stopper within the barrel upon actuation of the drive assembly, at least a portion of the drive assembly being disposed within the housing; a cap secured to the housing, the cap including an outer portion defining an interior space and a retainer including a body with a removal projection, the removal projection configured to remove the rigid needle shield upon axial movement of the outer portion of the cap away from the housing; a needle cover having a pre-use position in which the cannula is disposed within the needle cover, an actuation position in which the drive assembly is actuated, and a post-use position in which the cannula is disposed within the needle cover; Including, the outer portion is configured to receive a portion of the needle cover, the outer portion being configured to prevent movement of the needle cover from a pre-use position to an activated position; the outer portion may include a protrusion received by a cap opening defined by the needle cover, the protrusion of the outer portion configured to engage the needle cover upon movement of the needle cover from the pre-use position to the activated position; a portion of the retainer may be received within an interior space of the outer portion of the cap, the retainer being fixed to the outer portion and axially movable relative to the outer portion; the outer portion may include a retention tab received by a retainer opening defined by a body of the retainer, the retention tab disengaging from the body of the retainer when the outer portion is secured to the housing, the retention tab of the outer portion configured to engage the retainer upon axial movement of the outer portion away from the housing and upon axial movement of the outer portion relative to the retainer; the retainer may include a pair of wings extending radially outward from a body of the retainer, each wing configured to engage a rib extending radially inward from the body of the outer portion; The retention tabs may extend radially outward through retainer openings in the retainer; the retention tabs of the outer portion may be fixed to the body of the outer portion via extension arms, the retention tabs being movable radially inwardly via the extension arms; The retainer may include a flange that engages with the outer portion when the outer portion is secured to the housing; the flange of the retainer can be moved away from the outer part by axial movement of the outer part away from the housing; The surface of the removal protrusion may be planar and the corresponding surface of the rigid needle shield is planar; the body of the retainer may include a first end and a second end disposed opposite the first end, the removal projection extending radially inward from the body of the retainer via a removal arm, the removal arm extending radially inward in a direction extending from the second end of the body to the first end of the body; the removal projection is movable relative to the body of the retainer via a removal arm; a syringe holder may be disposed within the housing, the syringe holder receiving the syringe assembly, the syringe holder being movable relative to the housing, the syringe holder disengaging from the drive assembly when the outer portion is secured to the housing, the syringe holder engaging the drive assembly upon axial movement of the outer portion away from the housing; a surface of the removal projection may be configured to engage a corresponding surface of the rigid needle shield upon axial movement of the outer portion of the cap away from the housing to remove the rigid needle shield, and the surface of the removal projection disengages from the corresponding surface of the rigid needle shield when the outer portion is secured to the housing; the outer portion may include one of a locking projection and a locking recess, and the housing includes the other of the locking projection and the locking recess, the locking projection being received by the locking recess to secure the outer portion to the housing, and the locking projection being disengaged from the locking recess upon axial movement of the outer portion away from the housing before a surface of the removal projection engages a corresponding surface of the rigid needle shield; -The drug delivery device Housing and a syringe assembly including a barrel, a stopper, a cannula, and a rigid needle shield that receives at least a portion of the cannula, at least a portion of the syringe assembly being disposed within the housing; a drive assembly configured to move a stopper within the barrel upon actuation of the drive assembly, at least a portion of the drive assembly being disposed within the housing; a cap secured to a housing, the cap including an outer portion defining an interior space and a retainer including a body with a removal projection, the surface of the removal projection configured to engage a corresponding surface of the rigid needle shield upon axial movement of the outer portion of the cap away from the housing to remove the rigid needle shield, the surface of the removal projection disengaging from the corresponding surface of the rigid needle shield when the outer portion is secured to the housing; may include -The drug delivery device Housing and a syringe assembly including a barrel, a stopper, a cannula, and a rigid needle shield that receives at least a portion of the cannula, at least a portion of the syringe assembly being disposed within the housing; a drive assembly configured to move the stopper within the barrel upon actuation of the drive assembly, at least a portion of the drive assembly being disposed within the housing; a cap secured to a housing, the cap including an outer portion defining an interior space and a retainer including a body with a removal projection, a portion of the retainer received within the interior space of the outer portion of the cap, the retainer secured to the outer portion and axially movable relative to the outer portion, the outer portion including a retention tab received in a retainer opening defined by the body of the retainer, the retention tab disengaging from the body of the retainer when the outer portion is secured to the housing, the retention tab of the outer portion configured to engage the retainer upon axial movement of the outer portion away from the housing and upon axial movement of the outer portion relative to the retainer; may include -The drug delivery device Housing and a syringe assembly including a barrel, a stopper, a cannula, and a rigid needle shield that receives at least a portion of the cannula, at least a portion of the syringe assembly being disposed within the housing; a drive assembly configured to move the stopper within the barrel upon actuation of the drive assembly, at least a portion of the drive assembly being disposed within the housing; a cap secured to the housing, the cap including a retainer including an outer portion defining an interior space and a body with a removal projection; The housing may include a syringe holder disposed within the housing, the syringe holder receiving the syringe assembly, the syringe holder movable relative to the housing, the syringe holder disengaging from the drive assembly when the outer portion is secured to the housing, and the syringe holder engaging with the drive assembly upon axial movement of the outer portion away from the housing.

[0013] The above and other features and advantages of this disclosure, as well as the manner in which they are achieved, will become more apparent, and the disclosure itself will be better understood, by reference to the following description of embodiments of the disclosure, taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0014] [Figure 1A] FIG. 1 is a perspective view of a drug delivery device according to one aspect of the present application, showing the device in a stored position. [Figure 1B] FIG. 2 is a perspective view of the drug delivery device of FIG. 1, showing the device in a pre-use position. [Figure 2A] FIG. 2 is a cross-sectional view of the drug delivery device of FIG. 1, showing the device in a stored position. [Figure 2B] FIG. 2 is a cross-sectional view of the drug delivery device of FIG. 1, showing the device in a pre-use position. [Figure 3] FIG. 2 is a perspective view of the drug delivery device of FIG. 1, showing the device in an actuated position. [Figure 4] FIG. 2 is a cross-sectional view of the drug delivery device of FIG. 1, showing the device in an actuated position. [Figure 5] FIG. 2 is a perspective view of the drug delivery device of FIG. 1, showing the injection position of the device. [Figure 6] FIG. 2 is a cross-sectional view of the drug delivery device of FIG. 1, showing the injection position of the device. [Figure 7] FIG. 2 is a perspective view of the drug delivery device of FIG. 1, showing the post-use position of the device. [Figure 8] FIG. 2 is a cross-sectional view of the drug delivery device of FIG. 1, showing the position of the device after use. [Figure 9] FIG. 2 is a perspective view of the drug delivery device of FIG. 1 showing a locking clip. [Figure 10] FIG. 2 is an exploded perspective view of the drug delivery device of FIG. 1, showing the locking clip. [Figure 11A] 2 is a partial cross-sectional view of the drug delivery device of FIG. 1, showing the locking arm of the cassette body. FIG. [Figure 11B] FIG. 11B is an enlarged cross-sectional view of the area indicated in FIG. 11A. [Figure 12] 2 is a cross-sectional view of the drug delivery device of FIG. 1, showing the post-use position of the device prior to complete delivery of the agent. [Figure 13A] FIG. 2 is a partial cross-sectional view of the drug delivery device of FIG. 1, showing the cap of the device. [Figure 13B] FIG. 13B is an enlarged cross-sectional view of the area indicated in FIG. 13A. [Figure 14] FIG. 2 is a partial cross-sectional view of the drug delivery device of FIG. 1 showing the lever actuation member with the device in a stored position. [Figure 15A] 2 is a partial cross-sectional view of the drug delivery device of FIG. 1 illustrating the storage position of the device and movement of the needle cover. [Figure 15B] FIG. 15B is an enlarged cross-sectional view of the area indicated in FIG. 15A. [Figure 15C] FIG. 15B is an enlarged cross-sectional view of the area indicated in FIG. 15A. [Figure 16] FIG. 2 is a perspective view of a lever actuation member according to one aspect of the present application. [Figure 17A] FIG. 2 is a cross-sectional view of the drug delivery device of FIG. 1, showing the device in a stored position. [Figure 17B] FIG. 17B is an enlarged cross-sectional view of the area indicated in FIG. 17A. [Figure 17C] FIG. 17B is an enlarged cross-sectional view of the area indicated in FIG. 17A. [Figure 17D] FIG. 17B is an enlarged cross-sectional view of the area indicated in FIG. 17A. [Figure 17E] FIG. 17B is an enlarged cross-sectional view of the area indicated in FIG. 17A. [Figure 17F] FIG. 17B is an enlarged cross-sectional view of the area indicated in FIG. 17A. [Figure 18A] FIG. 2 is a partial cross-sectional view of the drug delivery device of FIG. 1 illustrating the initial removal of the cap of the device. [Figure 18B] FIG. 18B is an enlarged cross-sectional view of the area indicated in FIG. 18A. [Figure 18C] FIG. 18B is an enlarged cross-sectional view of the area indicated in FIG. 18A. [Figure 18D] FIG. 18B is an enlarged cross-sectional view of the area indicated in FIG. 18A. [Figure 18E]FIG. 18B is an enlarged cross-sectional view of the area indicated in FIG. 18A. [Figure 18F] FIG. 18B is an enlarged cross-sectional view of the area indicated in FIG. 18A. [Figure 19A] FIG. 2 is a partial cross-sectional view of the drug delivery device of FIG. 1 illustrating removal of the cap of the device. [Figure 19B] FIG. 19B is an enlarged cross-sectional view of the area indicated in FIG. 19A. [Figure 19C] FIG. 19B is an enlarged cross-sectional view of the area indicated in FIG. 19A. [Figure 19D] FIG. 19B is an enlarged cross-sectional view of the area indicated in FIG. 19A. [Figure 19E] FIG. 19B is an enlarged cross-sectional view of the area indicated in FIG. 19A. [Figure 19F] FIG. 19B is an enlarged cross-sectional view of the area indicated in FIG. 19A. [Figure 20A] FIG. 2 is a partial cross-sectional view of the drug delivery device of FIG. 1 illustrating removal of the cap of the device. [Figure 20B] FIG. 20B is an enlarged cross-sectional view of the area indicated in FIG. 20A. [Figure 20C] FIG. 20B is an enlarged cross-sectional view of the area indicated in FIG. 20A. [Figure 20D] FIG. 20B is an enlarged cross-sectional view of the area indicated in FIG. 20A. [Figure 20E] FIG. 20B is an enlarged cross-sectional view of the area indicated in FIG. 20A. [Figure 20F] FIG. 20B is an enlarged cross-sectional view of the area indicated in FIG. 20A. [Figure 21A] FIG. 2 is a partial cross-sectional view of the drug delivery device of FIG. 1 illustrating removal of the cap of the device. [Figure 21B] FIG. 21B is an enlarged cross-sectional view of the area indicated in FIG. 21A. [Figure 21C] FIG. 21B is an enlarged cross-sectional view of the area indicated in FIG. 21A. [Figure 21D] FIG. 21B is an enlarged cross-sectional view of the area indicated in FIG. 21A. [Figure 21E] FIG. 21B is an enlarged cross-sectional view of the area indicated in FIG. 21A. [Figure 21F] FIG. 21B is an enlarged cross-sectional view of the area indicated in FIG. 21A. [Figure 22A]FIG. 2 is a partial cross-sectional view of the drug delivery device of FIG. 1 illustrating removal of the cap of the device. [Figure 22B] FIG. 22B is an enlarged cross-sectional view of the area indicated in FIG. 22A. [Figure 22C] FIG. 22B is an enlarged cross-sectional view of the area indicated in FIG. 22A. [Figure 22D] FIG. 22B is an enlarged cross-sectional view of the area indicated in FIG. 22A. [Figure 22E] FIG. 22B is an enlarged cross-sectional view of the area indicated in FIG. 22A. [Figure 22F] FIG. 22B is an enlarged cross-sectional view of the area indicated in FIG. 22A. [Figure 23] FIG. 1 is a perspective view of a cap, a retainer, and a rigid needle shield according to one aspect of the present application. [Figure 24] FIG. 2 is a perspective view of a retainer according to one aspect of the present application. [Figure 25] FIG. 10 is a perspective view of a drug delivery device according to a further aspect of the present application, showing the device in a stored position. [Figure 26] 26 is a cross-sectional view taken along line 26-26 shown in FIG. 25. [Figure 27] FIG. 26 is a top perspective view of the motor body of the drug delivery device of FIG. 25. [Figure 28] FIG. 28 is a bottom perspective view of the motor body of FIG. 27. [Figure 29] FIG. 26 is a front perspective view of the plunger body of the drug delivery device of FIG. 25. [Figure 30] FIG. 30 is a rear perspective view of the plunger body of FIG. 29. [Figure 31] FIG. 26 is a front perspective view of a plunger rod portion of the drug delivery device of FIG. 25. [Figure 32] FIG. 32 is a rear perspective view of the plunger rod portion of FIG. 31. [Figure 33] FIG. 26 is a top perspective view of a lever actuation member of the drug delivery device of FIG. 25. [Figure 34] FIG. 34 is a bottom perspective view of the lever actuation member of the drug delivery device of FIG. 33. [Figure 35] FIG. 26 is a front perspective view of a syringe holder of the drug delivery device of FIG. 25. [Figure 36]FIG. 36 is a rear perspective view of the syringe holder of the drug delivery device of FIG. 35. [Figure 37] FIG. 26 is a front perspective view of a needle cover of the drug delivery device of FIG. 25. [Figure 38] FIG. 38 is a rear perspective view of the needle cover of the drug delivery device of FIG. 37. [Figure 39] FIG. 26 is a top perspective view of the cassette body of the drug delivery device of FIG. 25. [Figure 40] FIG. 40 is a bottom perspective view of the cassette body of the drug delivery device of FIG. 39. [Figure 41] 26 is a top perspective view of the cap of the drug delivery device of FIG. [Figure 42] FIG. 42 is a cross-sectional view taken along line 42-42 of FIG. 41. [Figure 43] FIG. 26 is a perspective view of a retainer of the drug delivery device of FIG. 25. [Figure 44] FIG. 26 is a cross-sectional view of the upper housing shell of the drug delivery device of FIG. 25. [Figure 45] FIG. 26 is a perspective view of the lower housing shell of the drug delivery device of FIG. 25. [Figure 46] FIG. 46 is a cross-sectional view taken along line 46-46 of FIG. 45. [Figure 47] FIG. 26 is a cross-sectional view of the drug delivery device of FIG. 25, showing the injection position of the device. [Figure 48] FIG. 26 is a partial cross-sectional view of the drug delivery system of FIG. 25. [Figure 49] FIG. 26 is a cross-sectional view of the drug delivery system of FIG. 25. DETAILED DESCRIPTION OF THE INVENTION

[0015] Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set forth herein illustrate exemplary embodiments of the present disclosure, and such exemplifications should not be construed as limiting the scope of the present disclosure in any way.

[0016] The following description is provided to enable any person skilled in the art to make and use the described embodiments contemplated for practicing the invention. However, various modifications, equivalents, variations, and alternatives will readily occur to those skilled in the art. All such modifications, variations, equivalents, and alternatives are intended to be within the spirit and scope of the invention.

[0017] For purposes of the following description, the terms "upper," "lower," "right," "left," "vertical," "horizontal," "top," "lower," "transverse," "longitudinal," and derivatives thereof will refer to the present invention when oriented in the view of the drawings. However, it should be understood that the present invention may assume various alternative modifications, except where expressly specified otherwise. It should also be understood that the specific devices illustrated in the accompanying drawings and described in the following specification are merely exemplary embodiments of the invention. Hence, specific dimensions and other physical characteristics related to the embodiments disclosed herein are not to be considered limiting.

[0018] 1A-10 , a drug delivery device 10 according to one embodiment of the present invention includes a first subassembly 12, a second subassembly 14, and a syringe assembly 16. The first subassembly 12 includes a cap 18 having an outer portion 20, a needle cover 22, a syringe holder 24, a cassette body 26, and a lower housing shell 28. The second subassembly 14 includes a drive assembly 40, a motor body 42, a lever actuation member 44, and an upper housing shell 46. The syringe assembly 16 is received by the syringe holder 24 and includes a barrel 52, a stopper 54, a cannula 56, and a rigid needle shield (RNS) 58. While an RNS is utilized, other suitable needle shield configurations may be utilized. The lower housing shell 28, the cassette body 26, and the upper housing shell 46 generally form a housing for receiving the various components of the device 10, although other suitable housing configurations may be utilized. As discussed in more detail below, first subassembly 12 and second subassembly 14 are secured together during assembly by locking clip 64, although other suitable configurations may be utilized. Drug delivery device 10 may be an automatic injection device, although embodiments described herein may be incorporated into other suitable drug delivery devices.

[0019] The drug delivery device 10 is configured to automatically deliver a dose of medication from the syringe assembly 16 to a patient upon actuation of the device 10. More specifically, actuation of the drug delivery device 10 causes the drive assembly 40 to engage the stopper 54 of the syringe assembly 16, displace the syringe assembly 16 so that the cannula 56 pierces the patient's skin, and displace the stopper 54 within the barrel 52 of the syringe assembly 16 to deliver the medication within the barrel 52. The drug delivery device 10 includes a storage position ( FIGS. 1A and 2A ), a pre-use position ( FIGS. 1B and 2B ), an actuated position ( FIGS. 3 and 4 ), an injection position ( FIGS. 5 and 6 ), and a post-use position ( FIGS. 7 and 8 ). As discussed in more detail below, the needle cover 22 is configured to shield the cannula 56 of the syringe assembly 16 from the patient when the device 10 is in the pre-use and post-use positions. In particular, the needle shroud 22 is movable between a pre-use position, an activated position, and a post-use position, and the spring 68 biases the needle shroud 22 toward the pre-use position and the post-use position. The spring 68 is disposed between the needle shroud 22 and the syringe holder 24, although other suitable configurations may be utilized. The lever actuating member 44 is movable between a locked position, in which movement of the drive assembly 40 is prevented, and a released position, in which movement of the drive assembly 40 is permitted. More specifically, the lever actuating member 44 is rotatable about a rotation axis 70 between the locked and released positions. When the lever actuating member 44 is in the locked position, the lever actuating member 44 engages the motor body 42 and the drive assembly 40, preventing movement of the drive assembly 40. When the lever actuating member 44 is in the released position, the lever actuating member 44 disengages from the motor body 42, thereby permitting movement of the drive assembly 40 toward the syringe assembly 16. The axis of rotation 70 of the lever actuating member 44 extends perpendicular to the longitudinal axis of the device 10, although other suitable configurations may be utilized.

[0020] 1-10 , the drive assembly 40 includes a plunger body 80 having a plunger rod portion 82 and a drive member 84. The drive member 84 is a compression spring received within a drive opening 86 defined by the plunger body 80, although other suitable drive members may be utilized, including, but not limited to, compressed gas, an electric motor, hydraulics, other types of springs, etc. The drive member 84 engages the plunger body 80 and the motor body 42 to bias the plunger body 80 in a direction extending from the second subassembly 14 toward the first subassembly 12. The plunger body 80 defines a lever opening 88 that receives the lever actuating member 44 and defines the axis of rotation 70 of the lever actuating member 44. The lever actuating member 44 prevents movement of the plunger body 80 by engaging the lever actuating member 44 with the motor body 42 when the lever actuating member 44 is in the locked position. Rotation of lever actuating member 44 from the locked position to the released position disengages lever actuating member 44 from motor body 42, thereby allowing drive member 84 to move plunger body 80 and plunger rod portion 82 toward first subassembly 12. Plunger rod portion 82 and drive member 84 are spaced apart and parallel to one another and extend longitudinally of device 10.

[0021] Drive assembly 40 further includes a spring guide member 90 secured to upper housing shell 46 and received within drive opening 86 of plunger body 80. Drive member 84 is received by spring guide member 90, with drive member 84 disposed between plunger body 80 and spring guide member 90. Drive assembly 40 also includes a plunger rod cover 92 that receives plunger rod portion 82 of plunger body 80. Plunger rod cover 92 is configured to guide insertion of plunger rod portion 82 into barrel 52 of syringe assembly 16 and to engage stopper 54 of syringe assembly 16 to dispense medicament from barrel 52 of syringe assembly 16. Plunger rod cover 92 and plunger rod portion 82 may be integrally formed or may be formed as separate components.

[0022] The plunger body 80 of the drive assembly 40 also includes an audible indicator member 94 configured to provide an audible indication to the user when the device 10 transitions to the post-use position. As discussed in more detail below, the audible indicator member 94 is configured to engage one or more ribs 96 of the cassette body 26 when the device 10 is in the injection position, thereby deflecting the audible indicator member 94. When the drug delivery device 10 transitions from the injection position to the post-use position, the audible indicator member 94 disengages from the rib 96(s) of the cassette body 26 and contacts the lower housing shell 28 to provide an audible click, although the audible indicator member 94 may also contact any other suitable portion of the device 10 to provide an audible indication.

[0023] 1A-2B, in the storage position, the cap 18 is secured to the lower housing shell 28 and engages the needle cover 22. Movement of the needle cover 22 from the pre-use position to the actuated position results in engagement between the needle cover 22 and the lever actuation member 44, thereby actuating the drive assembly 40. After removal of the cap 18 by grasping the outer portion 20, the needle cover 22 can be moved from the pre-use position to the actuated position by pressing the needle cover 22 against the patient's skin surface and pressing the device 10 axially against the skin surface. As described in more detail below, the engagement between the cap 18 and the needle cover 22 prevents the needle cover 22 from moving into engagement with the lever actuation member 44. Thus, removal of the cap 18 from the device 10 allows actuation of the device 10. As discussed in more detail below, removal of cap 18 from device 10 also removes RNS 58 from syringe barrel 52, as shown in FIGS. 1B and 2B, thereby exposing cannula 56, which is still received within needle cover 22 in the pre-use position of device 10.

[0024] 3 and 4, in the activated position, the cap 18 is removed and the needle cover 22 is placed in the activated position by engaging the patient's skin surface, which moves the needle cover 22 further within the device 10 toward the second subassembly 14. When the needle cover 22 moves a sufficient distance within the device 10, a portion of the needle cover 22 engages the lever actuating member 44, which rotates the lever actuating member 44 about the axis of rotation 70 from the locked position to the released position.

[0025] 5 and 6 , in the injection position, lever actuation member 44 is in a released position, which allows plunger body 80 of drive assembly 40 to move toward first subassembly 12, resulting in plunger body 80 or plunger rod cover 92 engaging the stopper of syringe assembly 16. Initial engagement of drive assembly 40 with syringe assembly 16 moves syringe assembly 16 and syringe holder 24 within device 10 relative to cassette body 26 until syringe holder 24 abuts stop 102 defined by cassette body 26. During this initial movement of syringe assembly 16 and syringe holder 24, with needle cover 22 pressed against the patient's skin surface, cannula 56 of syringe assembly 16 extends beyond needle cover 22 and pierces the patient's skin surface. Further movement of the plunger body 80, driven by the drive member 84, moves the stopper 54 relative to the barrel 52 of the syringe assembly 16, dispensing the medication from the barrel 52 of the syringe assembly 16, through the cannula 56, and into the patient. The plunger body 80 will continue to move until the stopper 54 bottoms out on the barrel 52 of the syringe assembly 16. When, or just before, the stopper 54 bottoms out, the audible indicator member 94 disengages from the rib(s) 96 of the cassette body 26 and substantially simultaneously contacts the lower housing shell 28, providing an audible indication to the patient that a dose of medication has been delivered. In addition to the audible indication, the drug delivery device 10 provides one or more visual indicators to inform the patient of the status of the device 10. In particular, cassette body 26 may be formed from a transparent material to allow visual confirmation of movement of stopper 54 and / or another visual indicator provided by drive assembly 40, syringe holder 24, and / or syringe assembly 16. Lower housing shell 28 also defines indicator opening 104 that provides a visual indication that plunger body 80 is in a final position and a dose of medication has been delivered. The visual indicator may utilize contrasting colors, symbols, patterns, or other suitable visual markers to indicate various states of the device.

[0026] 7, 8, 11A, 11B, and 12, in the post-use position, when the needle cover 22 is removed from the patient's skin surface, the needle cover 22 extends to the post-use position and shields the cannula 56. As shown more clearly in FIG. 11B, the cassette body 26 includes at least one locking arm 106 and the needle cover 22 includes at least one locking protrusion 108, although other suitable configurations may be utilized. The locking arm 106 of the cassette body 26 engages with the locking protrusion 108 of the needle cover 22 to prevent any further use of the device 10 and to prevent exposure of the cannula 56 of the syringe assembly 16. During transition of device 10 from the injection position to the post-use position, locking arm 106 of cassette body 26 flexes to allow locking projection 108 of needle cover 22 to pass through cassette body 26, and locking arm 106 returns to its original position, preventing movement of needle cover 22 back to the pre-use and activated position. In the pre-use position of needle cover 22, a portion of needle cover 22 engages cover stop 110 of syringe holder 24 to limit axial movement of needle cover 22 in a direction extending from second subassembly 14 toward first subassembly 12. After use of device 10, syringe holder 24 is displaced within cassette body 26 relative to needle cover 22, which allows needle cover 22 to extend to the post-use position when the patient removes needle cover 22 from the skin surface. 12, when the needle cover 22 is removed from the patient's skin surface, the needle cover 22 will move to the post-use position regardless of the position of the stopper 54 in the barrel 52 of the syringe assembly 16. Thus, if the patient removes the needle cover 22 from the skin surface after only a portion of the dose of medication has been delivered, the needle cover 22 will still move to the post-use position and prevent further use of the device 10.

[0027] 1A, 1B, and 13A-15C, as described above, engagement between cap 18 and needle cover 22 prevents needle cover 22 from moving into engagement with lever actuation member 44. Cannula 56 is disposed within needle cover 22 when needle cover 22 is in the pre-use and post-use positions. Needle cover 22 is configured to actuate drive assembly 40 when needle cover 22 is in the actuated position. Removal of cap 18 from device 10 enables actuation of device 10. More precisely, in one aspect of the present application, outer portion 20 of cap 18 includes body 116 defining interior space 118 that receives a portion of needle cover 22 when device 10 is in a storage position with outer portion 20 secured to lower housing shell 28. The outer portion 20 of the cap 18 is secured to the lower housing shell 28 via a locking projection 112 that is received in a locking recess 114 defined by a body 116 of the outer portion 20 of the cap 18. The outer portion 20 also includes a gripping surface 130 to facilitate gripping and removal of the outer portion 20 of the cap 18 from the lower housing shell 28.

[0028] The outer portion 20 includes a pair of protrusions 120 that are received by a cap opening 122 defined by the needle cover 22, although one or more protrusions 120 and one or more cap openings 122 can be utilized. The protrusions 120 of the outer portion 20 are configured to engage with the needle cover 22 upon movement of the needle cover 22 from the pre-use position to the activated position. For example, if the device 10 is dropped or impacted while in the storage position and the outer portion 20 is secured to the lower housing shell 28, applying a force to the needle cover 22, the lever actuation member 44, and / or other components, the protrusions 120 of the outer portion 20 limit the movement of the needle cover 22, which prevents unintended actuation of the device 10. The protrusions 120 of the outer portion 20 are radially movable via extension arms 124 of the outer portion 20. 13B, for example, engagement between extension arms 124 and lower housing shell 28 prevents radially outward movement of protrusions 120. More precisely, lower housing shell 28 includes a skirt configured to surround extension arms 124 of outer part 20 when outer part 20 is attached to lower housing shell 28, which prevents radially outward movement of protrusions 120 as long as outer part 20 is attached to lower housing shell 28. Protrusions 120 are configured to be removed from cap openings 122 of needle cover 22 by axial movement of outer part 20. In particular, protrusions 120 are configured to engage needle cover 22 and be deflected radially outward by axial movement of outer part 20 of cap 18.

[0029] 13B, each protrusion 120 defines a first cam surface 126 and needle cover 22 defines a second cam surface 128, with first cam surface 126 configured to engage second cam surface 128 to bias each protrusion 120 radially outward, which allows separation of outer portion 20 from needle cover 22. First and second cam surfaces 126, 128 are complementary ramped surfaces, although other suitable arrangements may be utilized.

[0030] As shown in FIGS. 14-16 , the needle cover 22 prevents movement or rotation of the lever actuating member 44 from the locked position to the released position when the needle cover 22 is in the pre-use position. The lever actuating member 44 includes a body 132 having a limiting surface 134 configured to engage the needle cover 22 and limit rotation of the lever actuating member 44 when the needle cover 22 is in the pre-use position. If the device 10 is dropped or impacted while in the storage position, applying a force to the lever actuating member 44, the lever actuating member 44 is prevented from fully rotating to enable actuation of the drive assembly 40 due to engagement between the limiting surface 134 of the lever actuating member 44 and the needle cover 22. The limiting surface 134 is spaced from the needle cover 22, forming a gap 136 when the device 10 is in the storage and pre-use positions, preventing any increased friction in the movement of the needle cover 22 while still preventing unintended actuation of the device 10.

[0031] The lever actuating member body 132 also includes an assembly surface 138 configured to engage a locking pin (not shown) that is received by a pin opening 140 defined by the motor body 42. Prior to assembly, the second subassembly 14 may include a locking pin extending through the pin opening 140, which prevents rotation of the lever actuating member 44 and unintended actuation of the drive assembly 40 during assembly of the device 10. The lever actuating member body 132 also includes a needle cover contact surface 142, a motor body contact surface 144, and defines a recessed area 146. The needle cover contact surface 142 of the lever actuating member 44 engages a lever contact portion 148 of the needle cover 22 when the needle cover 22 is moved to the actuated position, thereby rotating the lever actuating member 44 from the locked position to the released position. When the lever actuating member 44 is in the locked position, the motor body contact surface 144 of the lever actuating member 44 engages the stop surface 150 of the motor body 42, which prevents movement of the plunger body 80. When the lever actuating member 44 is rotated from the locked position to the released position, the motor body contact surface 144 disengages from the stop surface 150 of the motor body 42, which allows the drive member 84 to move the plunger body 80.

[0032] The recessed area 146 of the lever actuating member 44 provides clearance for the lever contact portion 148 of the needle cover 22, allowing rotation of the lever actuating member 44 from the locked position to the released position. The limiting surface 134 of the lever actuating member 44 overlaps with the lever contact portion 148 of the needle cover 22 in the axial direction of the device 10 when the needle cover 22 is in the pre-use position and until the needle cover 22 is fully moved to the activated position, which prevents unintended actuation of the device 10, as described above. When the needle cover 22 is fully moved to the activated position, the lever contact portion 148 of the needle cover 22 no longer overlaps with the limiting surface 134 of the lever actuating member but instead overlaps with the recessed area 146 in the axial direction of the device 10, engaging the needle cover contact surface 142 and rotating the lever actuating member 44, as described above. The limiting surface 134 of the lever actuating member 44 is planar and is configured to engage a corresponding planar surface on the bottom of the needle cover contact surface 142 when the needle cover 22 is in the pre-use position, although other suitable configurations may be utilized.

[0033] 17A-24 , according to one aspect of the present application, the device further includes a retainer 160 having a body 162 with a removal projection 164 configured to remove the RNS 58 upon axial movement of the outer portion 20 of the cap 18 away from the lower housing shell 28. A portion of the retainer 160 is received within the interior space 118 of the outer portion 20. The outer portion 20 includes a retention tab 166 that is received by a retainer opening 168 defined by the body 162 of the retainer 160 to secure the retainer 160 to the outer portion 20. As described in more detail below, the retention tab 166 is configured to engage the retainer 160 upon axial movement of the outer portion 20 away from the lower housing shell 28. 23 and 24, retainer 160 further includes a pair of wings 170 extending radially outward from body 162 of retainer 160, with each wing 170 configured to engage with a rib 172 extending radially inward from body 162 of outer portion 20. Wings 170 prevent wobble between outer portion 20 and retainer 160 when outer portion 20, retainer 160, and RNS 58 are removed.

[0034] As shown in FIG. 17C , the retention tabs 166 of the outer portion 20 disengage from the retainer 160 when the outer portion 20 is secured to the lower housing shell 28 with the device 10 in the storage position. As shown in FIGS. 20C , 21C , and 22C , the retention tabs 166 of the outer portion 20 disengage from the retainer 160 when the outer portion 20 is secured to the lower housing shell 28. The retention tabs 166 of the outer portion 20 are secured to the body 116 of the outer portion 20 via extension arms 174. The retention tabs 166 are movable radially inward via the extension arms 174. The flexibility of the extension arms 174 facilitates assembly of the retainer 160 to the outer portion 20 by allowing the retention tabs 166 to deflect radially inward when engaging the retainer 160 until the retention tabs 166 are received within the retainer openings 168. Retainer 160 includes a flange 176 that engages outer portion 20 when outer portion 20 is secured to lower housing shell 28. Flange 176 of retainer 160 is moved away from outer portion 20 upon axial movement of outer portion 20 away from lower housing shell 28.

[0035] 17E, the body 162 of the retainer 160 is cylindrical and includes a first end 178 and a second end 180 disposed opposite the first end 178. The removal protrusion 164 extends radially inward from the body 162 of the retainer 160 via a removal arm 182. The removal arm 182 extends radially inward from the second end 180 of the body 162 to the first end 178 of the body 162, which allows the retainer 160 to be positioned on the RNS 58 and syringe assembly 16 during assembly of the outer portion 20 and the retainer 160 into the device 10. The removal protrusion 164 is movable relative to the body 162 of the retainer 160 via the removal arm 182. More specifically, the removal projection 164 is movable radially outward during assembly of the retainer 160 to the RNS 58 and is movable radially inward during removal of the outer portion 20 and the retainer 160. The removal projection 164 includes a surface 184 configured to engage a complementary surface 186 on the RNS 58. The surface 184 of the removal projection 164 of the retainer 160 disengages from the corresponding surface 186 on the RNS 58 when the outer portion 20 is secured to the lower housing shell 28. The surface 184 of the removal projection 164 is planar, although other suitable shapes and configurations may be utilized. The corresponding surface 186 on the RNS 58 is planar, although other suitable shapes and configurations may be utilized. The corresponding surface 186 on the RNS 58 is defined by a flange portion of the RNS 58.

[0036] 17F, the syringe holder 24 disengages from the plunger body 80 of the drive assembly 40 when the outer portion 20 is secured to the lower housing shell 28. Referring to FIG. 19F, for example, the syringe holder 24 engages with the plunger body 80 of the drive assembly 40 by axial movement of the outer portion 20 of the cap 18 away from the lower housing shell 28. More specifically, a pair of arms extend from the syringe holder 24 and engage with the audible indicator member 94 of the plunger body 80, although other suitable configurations may be utilized. The engagement between the syringe holder 24 and the plunger body 80 of the drive assembly 40 prevents removal of the outer portion 20 and RNS 58 from moving the syringe holder 24 relative to the cassette body 26 due to friction between the syringe assembly 16 and the syringe holder 24. The engagement between the syringe holder 24 and the plunger body 80 also limits axial movement of the syringe holder 24 within the device 10 caused by movement of the device 10 or by gravity when the device is in the pre-use position.

[0037] 17A-17F, when device 10 is in the storage position with outer portion 20 secured to lower shell assembly 28, flange 176 of retainer 160 abuts outer portion 20 (FIG. 17B), retention tab 166 of outer portion 20 is disposed within retainer opening 168 and spaced from a proximal portion of body 162 of retainer 160 (FIG. 17C), cap projection 120 is received within cap opening 122 of needle cover 22 and spaced from needle cover 22 (FIG. 17D), surface 184 of removal projection 164 is spaced from corresponding surface 186 of RNS 58 (FIG. 17E), and syringe holder 24 is spaced from plunger body 80 of drive assembly 40 (FIG. 17F). In the storage position of device 10, retainer 160 engages syringe holder 24. When flange 176 of retainer 160 abuts outer portion 20, surface 184 of removal projection 164 of retainer 160 is properly positioned against complementary surface 186 of RNS 58. In other words, abutment of flange 176 with outer portion 20 ensures that retainer 160 is axially positioned toward lower housing shell 28 sufficiently to allow removal of RNS 58, as described below.

[0038] 18A-18F, when outer portion 20 is initially moved axially away from lower housing shell 28 (FIG. 18B), locking projection 112 is only partially received within locking recess 114, flange 176 of retainer 160 is spaced apart from outer portion 20, retention tab 166 is still spaced apart from body 162 of retainer 160 (FIG. 18C), protrusion 120 of outer portion 20 engages needle cover 22 (FIG. 18D), surface 184 of removal projection 164 is spaced apart from corresponding surface 186 of RNS 58 (FIG. 18E), and syringe holder 24 is spaced apart from plunger body 80 of drive assembly 40 (FIG. 18F).

[0039] 19A-19F, as outer portion 20 continues to be moved axially away from lower housing shell 28 (FIG. 19B), locking projection 112 is only partially received within locking recess 114, flange 176 of retainer 160 is spaced apart from outer portion 20, retention tab 166 is still spaced apart from body 162 of retainer 160 (FIG. 19C), protrusion 120 of outer portion 20 engages needle cover 22 (FIG. 19D), surface 184 of removal projection 164 is spaced apart from corresponding surface 186 of RNS 58 (FIG. 19E), and syringe holder 24 engages plunger body 80 of drive assembly 40 (FIG. 19F).

[0040] 20A-20F, as outer portion 20 continues to be moved axially away from lower housing shell 28 (FIG. 20B), locking projection 112 is disengaged from locking recess 114, flange 176 of retainer 160 is further moved away from outer portion 20, retention tab 166 engages body 162 of retainer 160 (FIG. 20C), such that outer portion 20 and retainer 160 move axially together away from lower housing shell 28, protrusion 120 of outer portion 20 disengages from needle cover 22 (FIG. 20D) and is removed from cap opening 122, surface 184 of removal projection 164 is moved away from corresponding surface 186 of RNS 58 (FIG. 20E), and syringe holder 24 engages plunger body 80 of drive assembly 40 (FIG. 20F).

[0041] 21A-21F, as outer portion 20 continues to be moved axially away from lower housing shell 28 (FIG. 21B), flange 176 of retainer 160 is forced away from outer portion 20 and retention tab 166 engages body 162 of outer portion 20 (FIG. 21C), such that outer portion 20 and retainer 160 move axially together away from lower housing shell 28, protrusion 120 of outer portion 20 continues to disengage from needle cover 22 (FIG. 21D), surface 184 of removal projection 164 engages corresponding surface 186 of RNS 58 (FIG. 21E), and syringe holder 24 engages plunger body 80 of drive assembly 40 (FIG. 21F).

[0042] 22A-22F, as outer portion 20 continues to be moved axially away from lower housing shell 28 and separated therefrom (FIG. 22B), flange 176 of retainer 160 is forced away from outer portion 20 and retention tab 166 engages body 162 of retainer 160 (FIG. 22C), such that outer portion 20 and retainer 160 move axially together away from lower housing shell 28, protrusion 120 of outer portion 20 continues to disengage from needle cover 22 (FIG. 22D), surface 184 of removal projection 164 continues to engage corresponding surface 186 of RNS 58, axially displacing RNS 58 relative to barrel 52 of syringe assembly 16 (FIG. 22E), and syringe holder 24 engages plunger body 80 of drive assembly 40 (FIG. 22F).

[0043] Referring to FIG. 23, upon complete removal of outer portion 20 from lower housing shell 28, RNS 58 remains engaged with retainer 160 and RNS 58 is completely separated from barrel 552 of syringe assembly 16.

[0044] 17A-24 , as described above, outer portion 20 and retainer 160 are configured to minimize the amount of force required to remove outer portion 20 and retainer 160 from device 10 by sequentially separating the various components from one another, rather than simultaneously. By sequentially removing outer portion 20 from lower housing shell 28, separating projection 120 of outer portion 20 from needle cover 22, and removing RNS 58 from syringe assembly 16, the patient need only apply sufficient force for each step in the sequence, rather than the large force that would be required to remove such components simultaneously. As described above, such sequencing is provided through the relative movement between outer portion 20 and retainer 160, the relative movement between outer portion 20 and needle cover 22, and the relative movement between retainer 160 and RNS 58.

[0045] 25-49, a drug delivery device 300 according to a further embodiment of the present invention is shown. The drug delivery device 300 is similar to the drug delivery device 10 shown in FIGS. 1A-24, with certain differences being described in detail below. The drug delivery device 300 includes, among other components, a motor body 302, a plunger body 304, a plunger rod portion 306, a lever actuation member 308, a syringe holder 310, a needle cover 312, a cassette body 314, a cap 316, a retainer 318, an upper housing shell 320, and a lower housing shell 322.

[0046] 24-28, the motor body 302 is similar to and functions similarly to the motor body 42 of FIGS. 1A-24, but further includes a longitudinal groove 324, reinforcing ribs 326(s), and cassette clip(s) 328. The longitudinal groove 324 is configured to receive a molded parting line of the plunger body 304 to ensure smooth sliding between the motor body 302 and the plunger body 304. The reinforcing ribs 326(s) provide additional support to the pair of arms 260 of the motor body 302. The cassette clip(s) 328 are received by opening(s) 330 defined by the cassette body 314 to secure the motor body 302 to the cassette body 314, as will be described in more detail below. The cassette clip(s) 328 include angled surfaces 332 and flat surfaces 334 that are configured to allow the cassette clip(s) 328 to be inserted into the opening(s) 330 of the cassette body 314, but to prevent easy removal of the cassette clip(s) 328 once inserted into the opening(s) 330 of the cassette body 314. A bottom surface 336 of the motor body 302 includes a chamfered portion 338 to aid in assembly of the device 300.

[0047] 26 and 29-32, the plunger body 304 is formed separately from, rather than integrally with, the plunger rod portion 306. Additionally, the device 300 does not include the plunger rod cover 92. The plunger body 304 defines an opening 340 that receives the plunger rod clip 342 of the plunger rod portion 306. The plunger rod clip 342 is barb-shaped and configured to be inserted into, but not easily removed from, the opening 340 in the plunger body 304, although other suitable shapes and configurations may be utilized. The plunger rod clip 342 defines a central opening 344 that compresses the plunger rod clip 342 when inserted into the opening 340 in the plunger body 304 and allows the plunger rod clip 342 to expand to its original shape once received within the plunger body 304. The plunger rod portion 306 includes plunger body stops 346(s) and a biasing member 348. The plunger body stops 346, which may be one or more protrusions, contact the plunger body 304 when the plunger rod clip 342 is inserted into the opening 340 of the plunger body 304. The biasing member 348 engages the plunger body 304 during insertion of the plunger rod clip 342 into the opening 340 of the plunger body 304, biasing the plunger rod portion 306 toward the plunger body 304. The biasing member 348 provides additional tolerance for insertion of the plunger rod clip 342 into the opening 340 of the plunger body 304 while ensuring that there are no gaps between the plunger body 304 and the plunger rod portion 306 after assembly. The biasing member 348 of the plunger rod portion 306 is annular, although other suitable shapes and configurations may be utilized.

[0048] Plunger rod portion 306 further includes a stopper interface 350 that is received by stopper 54. Stopper interface 350 is a cross-shaped protrusion, although other suitable shapes and configurations may be utilized. Plunger rod portion 306 has a conical profile configured to reduce stress on syringe assembly 16, although other suitable shapes may be utilized. Plunger body 304 includes a lever rib 352 that extends into lever opening 88 of plunger body 304. Lever rib 352 is configured to be received by lever actuating member 308, as discussed in more detail below.

[0049] 33 and 34, lever actuating member 308 is similar to and functions similarly to lever actuating member 44, described above and shown in FIGS. 1A-24. However, lever actuating member 308 defines a groove 354 in pivot 70 that receives lever rib 352 of plunger body 304. Engagement between groove 354 and lever rib 352 prevents relative lateral movement between plunger body 304 and lever actuating member 308. Needle cover contact surface 142 of lever actuating member 308 includes a larger surface area compared to needle cover contact surface 142 of lever actuating member 44 of FIGS. 1A-24.

[0050] 35 and 36, syringe holder 310 is similar to syringe holder 24 of FIGS. 1A-24 and functions similarly. However, syringe holder 310 further includes a plurality of ribs 356 extending circumferentially around syringe holder 310. The ribs engage spring 68. Locking ring 220 of syringe holder 310 further includes a plurality of protrusions 358 extending radially inward. Protrusions 358 engage syringe assembly 16 to eliminate any gaps between the outer surface of syringe assembly 16 and syringe holder 310. Protrusions 358 are elastomeric and can be compressed when syringe assembly 16 is received within syringe holder 310.

[0051] 37 and 38, the needle cover 312 is similar to and functions similarly to the needle cover 22 of FIGS. 1A-24. The needle cover 312 includes spring ribs 360 that engage the spring 68 to retain the spring 68 between the needle cover 312 and the syringe holder 310. The needle cover 312 also includes cassette ribs 362 for guiding movement of the needle cover 312 relative to the cassette body 314.

[0052] 39, 40, 48, and 49, the cassette body 314 is similar to and functions similarly to the cassette body 26 of FIGS. 1A-24. As described above, the cassette body 314 includes openings 330(s) that receive the cassette clip(s) 328 of the motor body 302. The cassette body 314 includes needle cover clip(s) 364 that engage with clip surface(s) 366 of the needle cover 312. The clip surface(s) 366 of the needle cover 312 are planar, although other suitable shapes and configurations may be utilized. The needle cover clip(s) 364 are configured to limit axial movement of the needle cover 312 relative to the cassette body 314. The cassette body 314 further includes motor body rib(s) 368 and upper housing shell rib(s) 370 configured to engage corresponding portions of the motor body 302 and upper housing shell 320 to assist in assembly of the device 300. The cassette body 314 also includes syringe holder stop(s) 372 configured to engage a portion of the syringe holder 310 and limit axial movement of the syringe holder 310 relative to the cassette body 314. Although not shown in FIG. 48 , a locking clip 64 may also be utilized with the drug delivery device 300.

[0053] 41-46, cap 316 is similar to and functions similarly to cap 18, described above and shown in FIGS. 1A-24. Cap 316 includes protrusion(s) 374 received by cap opening(s) 376 defined by needle cover 312, which are disposed 90 degrees relative to the positions of those elements of cap 18 in FIGS. 1A-24. Protrusion(s) 374 of cap 316 are configured to engage needle cover 312 upon movement of needle cover 312 from the pre-use position to the activated position. For example, if device 300 is in the storage position and cap 316 is secured to lower housing shell 322 and the device is dropped or impacted, applying force to needle cover 312, lever actuation member 308, and / or other components, protrusion(s) 374 limit movement of needle cover 312, which prevents unintended actuation of device 300. Cap 316 further includes retainer clip(s) 378 and rib(s) 380 that engage with wing(s) 382 of retainer 318. Retainer clip(s) 378 and rib(s) 380 secure retainer 318 to cap 316 and prevent any movement or wobble of retainer 318 relative to cap 316. Retainer 318 is configured to remove RNS 58 when cap 316 is removed from lower housing shell 322. Cap 316 includes lower housing shell clip(s) 384 that engage lower housing shell 322 to secure cap 316 to lower housing shell 322. Upper housing shell 320 and lower housing shell 322 are similar to and function similarly to upper housing shell 46 and lower housing shell 28, described above and shown in FIGS. 1A-24 . However, the lower housing shell 322 has a cap interface 386 for receiving the lower housing shell clip(s) 384 of the cap 316 .

[0054] 47, the drug delivery device 300 is shown in the injection position. The injection depth of the cannula 56 is determined by the contact between the syringe holder 310 and the cassette body 314 at point X and the contact between the needle cover 312 and the syringe holder 310 at point Y.

[0055] 47, the drug delivery device 300 includes an audible indicator member 388, which is similar to and functions similarly to the audible indicator member 94 described above and shown in FIGS. 1A-24. Like the audible indicator member 94 described above, the audible indicator member 388 of the drug delivery device 300 is configured to provide an audible indication to the user when the device 300 transitions to the post-use position. The audible indicator member 388 is configured to engage with ribs 390(s) of the cassette body 314, which deflect the audible indicator member 388 when the device 300 is in the injection position. The audible indicator member 388 disengages from the ribs 390(s) of the cassette body 314 and contacts the lower housing shell 322 to provide an audible click when the drug delivery device 300 transitions from the injection position to the post-use position. However, the distal ends 392 of the ribs 390(s) on the cassette body 314 are angled rearward toward the upper housing shell 320, which beneficially provides a larger audible click compared to the arrangement of the ribs 96(s) on the cassette body described above in connection with Figures 1A-24.

[0056] In one aspect or embodiment, angle Z of distal ends 392 of ribs 390(s) of cassette body 314 relative to a plane extending perpendicular to the longitudinal axis of device 300 is greater than 5 degrees. In one aspect or embodiment, angle Z of distal ends 392 of ribs 390(s) is greater than 10 degrees. In one aspect or embodiment, angle Z of distal ends 392 is 25 degrees.

[0057] Elements of one disclosed embodiment may be combined with elements of one or more other disclosed embodiments to form different combinations, all of which are considered to be within the scope of the present invention.

[0058] While this disclosure has been described as having an exemplary design, the disclosure can be further modified within the spirit and scope of the disclosure. Accordingly, this application is intended to cover any variations, uses, or adaptations of the disclosure using its general principles. Further, this application is intended to cover such departures from the disclosure as come within known or customary practice in the art to which this disclosure pertains and which fall within the scope of the appended claims.

Claims

1. 1. A drug delivery device comprising: Housing and a syringe assembly including a barrel having a proximal end, a distal end including a cannula and a rigid needle shield disposed near said cannula, and a sidewall that holds a composition and a stopper and is positioned between said composition and said stopper, wherein at least a portion of said syringe assembly is received within said housing; a drive assembly configured to move the stopper within the barrel upon actuation of the drive assembly, at least a portion of the drive assembly being disposed within the housing; and the needle cover having a pre-use position in which the cannula is disposed within the needle cover, an actuation position in which the drive assembly is actuated, and a post-use position in which the cannula is disposed within the needle cover; a cap secured to the housing, the cap including an outer portion having a proximal end, a distal end, a single sidewall positioned between the proximal end and the distal end and defining an interior space, a plurality of ribs extending into the interior space, and a plurality of retainer clips positioned proximally of the plurality of ribs, the sidewall being positioned to cover the needle cover; a retainer having a proximal end, a distal end, and a sidewall located between the proximal end and the distal end, the sidewall including a plurality of removal projections, and the distal end including a plurality of wings; Including, the removal projection is configured to remove the rigid needle shield upon axial movement of the outer portion of the cap away from the housing; the plurality of wings are configured to engage the plurality of ribs and the plurality of retainer clips; The drug delivery device, wherein engagement between the wings and the plurality of ribs and the plurality of retainer clips limits relative movement between the outer portion and the retainer.

2. 10. The drug delivery device of claim 1, wherein the retainer comprises a body at the distal end of the retainer, the plurality of wings extending from the body.

3. 3. The drug delivery device of claim 2, wherein the rib and the retainer clip extend radially inward from the outer portion.

4. 4. The drug delivery device of claim 3, wherein the ribs are arranged in pairs, and the wings are received between the pair of ribs.

5. 2. The drug delivery device of claim 1, wherein the plurality of wings comprises two wings positioned on opposite sides of the retainer.

6. 6. A drug delivery device as described in claim 5, wherein the outer portion further has a plurality of protrusions extending into the interior space, the plurality of protrusions consisting of two protrusions positioned on opposite sides of the outer portion.

7. 10. The drug delivery device of claim 1, wherein the removal projection is circumferentially offset from the wing.

8. 2. The drug delivery device according to claim 1, wherein the plurality of removal protrusions comprises two removal protrusions disposed on opposite sides of the retainer.

9. 1. A cap assembly for a drug delivery device, comprising: an outer portion having a proximal end, a distal end, a single sidewall positioned between the proximal end and the distal end and defining an interior space, a plurality of ribs extending into the interior space, and a plurality of retainer clips positioned proximally of the plurality of ribs, the sidewall being positioned to cover the needle cover; a retainer having a proximal end, a distal end, and a sidewall located between the proximal end and the distal end, the sidewall including a plurality of removal projections, and the distal end including a plurality of wings; Including, the plurality of wings are configured to engage the plurality of ribs and the plurality of retainer clips; A cap assembly for a drug delivery device, wherein engagement between the wings and the plurality of ribs and the plurality of retainer clips limits relative movement between the outer portion and the retainer.

10. 10. The cap assembly of claim 9, wherein the retainer comprises a body at the distal end of the retainer, the plurality of wings extending from the body.

11. 10. The cap assembly of claim 9, wherein the rib and the retainer clip extend radially inward from the outer portion.

12. 12. The cap assembly of claim 11, wherein the ribs are arranged in pairs, and the wings are received between the pair of ribs.

13. 10. The cap assembly of claim 9, wherein the plurality of wings comprises two wings located on opposite sides of the retainer.

14. 14. The cap assembly of claim 13, wherein the outer portion further comprises a plurality of protrusions extending into the interior space, the plurality of protrusions consisting of two protrusions positioned on opposite sides of the outer portion.

15. 10. The cap assembly of claim 9, wherein the removal projection is circumferentially offset from the wing.

16. 10. The cap assembly according to claim 9, wherein the plurality of removal protrusions comprises two removal protrusions disposed on opposite sides of the retainer.

Images