Cartridge holder and associated injection system

Abstract

A cartridge holder for a cartridge having a cartridge body and a piston includes a holder for accommodating the cartridge, a first mating member mounted on the holder and unmovable relative to the holder, a second mating member mounted on the holder and unmovable relative to the holder, and an elastic member mounted on the holder and unmovable relative to the first mating member. The second matching piece can move relative to the first matching piece, the second matching piece is separated from the first matching piece through rotation, the elastic piece is arranged between the first matching piece and the second matching piece, and after the second matching piece is separated from the first matching piece through rotation, the elastic piece is arranged between the first matching piece and the second matching piece. The elastic piece is used for driving the second matching piece to push the piston to slide relative to the box body in the first direction.

Description

[0001] This application claims priority to a patent application filed with the United States Patent Office on December 3, 2023, with application number 18 / 527,361 and invention title "Cartridge Holder and Related Injection System", the entire content of which is incorporated herein by reference. Technical Field

[0002] The present invention relates to a cartridge product and a related injection system, and more particularly to a cartridge holder for a cartridge having a cartridge body and a piston and a related injection system. Background Art

[0003] An injection system (such as a pen injector or a wearable injector) is a medical device designed to deliver drugs. To ensure the normal delivery of drugs, the injection system is usually configured with a force application mechanism for pushing against the piston. The release force provided by the force application mechanism can overcome the resistance between the piston and the cartridge so that the piston can smoothly move out of the static state without being stuck. However, the existing injection systems fail to meet the requirements of simple structure and convenient operation, so the injection system urgently needs to be improved. Summary of the Invention

[0004] One object of the present invention is to provide a cartridge holder for a cartridge having a cartridge body and a piston and a related injection system to solve the above problems.

[0005] To achieve the above object, the present invention provides a cartridge holder for a cartridge having a cartridge body and a piston. The cartridge holder includes a holding member, a first engaging member, a second engaging member, and an elastic member. The holding member is used to accommodate the cartridge. The first engaging member is installed on the holding member and cannot move relative to the holding member. The second engaging member can move relative to the first engaging member. The second engaging member is disengaged from the first engaging member by rotation. The elastic member is disposed between the first engaging member and the second engaging member. After the second engaging member is disengaged from the first engaging member by rotation, the elastic member is used to drive the second engaging member to push against the piston to slide relative to the cartridge body in a first direction.

[0006] According to one embodiment of the present invention, the holding member includes a first end and a second end opposite to the first end. The first end is formed with an insertion portion for allowing the insertion of an insert, and the first engaging member is located near the second end.

[0007] According to one embodiment of the present invention, at least a part of the second engaging member is movably disposed between the first engaging member and the first end of the holding member.

[0008] According to one embodiment of the present invention, at least a part of the elastic member is accommodated in one of the first engaging member and the second engaging member.

[0009] According to one embodiment of the present invention, the second fitting member includes a fitting structure, the fitting structure includes an inclined surface, and when the inclined surface is abutted along a second direction opposite to the first direction, the second fitting member is driven to rotate.

[0010] According to one embodiment of the present invention, at least a part of the fitting structure is exposed outside the holding member.

[0011] According to one embodiment of the present invention, the holding member includes a slotted structure, and at least a part of the fitting structure is exposed outside the holding member through the slotted structure.

[0012] According to one embodiment of the present invention, the slotted structure extends along the long axis direction of the holding member, the slotted structure includes a guiding portion and an exposing portion connected to the guiding portion, and at least a part of the fitting structure is exposed outside the holding member through the exposing portion.

[0013] According to one embodiment of the present invention, the first fitting member includes a first engaging structure, the second fitting member includes a second engaging structure, the second engaging structure is used for engaging with the first engaging structure, and when the second fitting member rotates, the second engaging structure is driven to disengage from the first engaging structure.

[0014] According to one embodiment of the present invention, the first fitting member includes a first locking structure, the holding member includes a second locking structure, and the second locking structure is used for engaging with the first locking structure to limit the first fitting member so that the first fitting member cannot move relative to the holding member.

[0015] To achieve the above object, the present invention further provides an injection system, which includes a syringe body and a cartridge device. The syringe body includes an abutting member. The cartridge device is detachably installed on the syringe body. The cartridge device includes a cartridge and a cartridge holder. The cartridge includes a cartridge body and a piston. The piston can slide relative to the cartridge body. The cartridge holder is used for holding the cartridge. The cartridge holder includes a holding member, a first fitting member, a second fitting member, and an elastic member. The holding member is used for accommodating the cartridge. The first fitting member is installed on the holding member and cannot move relative to the holding member. The second fitting member can move relative to the first fitting member. When the cartridge device slides relative to the syringe body along a first direction, the abutting member drives the second fitting member to rotate and disengage from the first fitting member. The elastic member is disposed between the first fitting member and the second fitting member. After the abutting member drives the second fitting member to rotate and disengage from the first fitting member, the elastic member is used for driving the second fitting member to push the piston to slide relative to the cartridge body along the first direction.

[0016] In summary, the present invention uses an abutting member to drive the second engaging member to rotate and disengage from the first engaging member, and after the second engaging member disengages from the first engaging member, an elastic member is used to drive the second engaging member to push the piston to slide relative to the cartridge body in the first direction (that is, after the second engaging member disengages from the first engaging member, the elastic member indirectly applies a disengaging force to the piston through the second engaging member to overcome the resistance between the piston and the cartridge body). Therefore, the present invention has the advantages of simple structure and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of the injection system according to an embodiment of the present invention when the cartridge device is detached from the syringe body.

[0018] Figure 2 FIG. is an exploded view of the components of the cartridge device according to an embodiment of the present invention.

[0019] Figure 3 FIG. is a schematic diagram of the holding member according to an embodiment of the present invention.

[0020] Figure 4 FIG. is a schematic diagram of the first engaging member, the second engaging member and the elastic member according to an embodiment of the present invention.

[0021] Figure 5 FIG. is a schematic diagram of the injection system according to an embodiment of the present invention in the first use state.

[0022] Figure 6 FIG. is a partial structural schematic diagram of the cartridge device according to an embodiment of the present invention when the injection system is in the first use state.

[0023] Figure 7 FIG. is a schematic diagram of the injection system according to an embodiment of the present invention in the second use state.

[0024] Figure 8 FIG. is a partial structural schematic diagram of the cartridge device according to an embodiment of the present invention when the injection system is in the second use state.

[0025] Figure 9 FIG. is a schematic diagram of the injection system according to an embodiment of the present invention in the third use state.

[0026] Figure 10 FIG. is a partial structural schematic diagram of the cartridge device according to an embodiment of the present invention when the injection system is in the third use state.

[0027] In the figure:

[0028] 1: Injection system

[0029] 11: Cartridge device

[0030] 111: Cartridge

[0031] 1111: Cartridge body

[0032] 1112: Piston

[0033] 112: Medicine cartridge holder

[0034] 1121: Holder

[0035] 1121A: Second locking structure

[0036] 1121B: Grooved structure

[0037] 1122: First mating part

[0038] 1122A: First locking structure

[0039] 1122B: First engaging structure

[0040] 1123: Second mating part

[0041] 1123A: Second engaging structure

[0042] 1123B: Mating structure

[0043] 1124: Elastic part

[0044] 12: Syringe body

[0045] 121: Contact part

[0046] 122: Accommodating structure

[0047] 123: Insertion part

[0048] D1: First direction

[0049] D2: Second direction

[0050] E1: First end

[0051] E2: Second end

[0052] H: Insertion part

[0053] P1: Guiding part

[0054] P2: Exposed part

[0055] R: Rotation direction

[0056] L1: Engaging position

[0057] L2: Disengaging position

[0058] S: Inclined plane Detailed implementation manners

[0059] The directional terms mentioned below, such as: up, down, left, right, front or back, etc., are only references to the directions in the drawings. Therefore, the directional terms used are for illustration and not intended to limit the present invention. In addition, unless otherwise specified, the term "coupled" or "connected" mentioned below herein includes any direct and indirect electrical or structural connection means. Therefore, if the text describes that the first device is coupled / connected to the second device, it means that the first device can be directly structurally connected to the second device, or indirectly structurally connected to the second device through other devices or connection means.

[0060] Please refer to Figures 1 to 4 , FIG. 1 is a schematic diagram of the injection system 1 according to Embodiment 1 of the present invention when the cartridge device 11 is detached from the syringe body 12. Figure 2 is an exploded view of the components of the cartridge device 11 according to an embodiment of the present invention. Figure 3 is a schematic diagram of a holding member 1121 according to an embodiment of the present invention. Figure 4 is a schematic diagram of the first mating member 1122, the second mating member 1123 and the elastic member 1124 according to an embodiment of the present invention. As Figures 1 to 4 shown, the injection system 1 includes a cartridge device 11 and a syringe body 12. The cartridge device 11 is detachably mounted on the syringe body 12. For example, the cartridge device 11 can be slid to achieve installation or detachment relative to the syringe body 12. The syringe body 12 includes an abutting member 121, a receiving structure 122 and an inserting member 123. The receiving structure 122 is used to at least partially receive the cartridge device 11. The abutting member 121 is disposed on the side wall of the receiving structure 122 and is used to cooperate with the cartridge device 11. The inserting member 123 is disposed on the bottom wall of the receiving structure 122 and can be inserted into the cartridge device 11 so that the drug in the cartridge device 11 can flow out of the cartridge device 11 through the inserting member 123. In this embodiment, the abutting member 121 can be a rod-shaped structure, and the inserting member 123 can be a hollow needle, but the present invention is not limited to this embodiment.

[0061] Furthermore, as Figures 1 to 4As shown, the cartridge device 11 includes a cartridge 111 and a cartridge holder 112 for holding the cartridge 111. The cartridge 111 can be a cartridge-type container for accommodating drugs and includes a cartridge body 1111 and a piston 1112 that can slide relative to the cartridge body 1111. The cartridge holder 112 includes a holding member 1121, a first engaging member 1122, a second engaging member 1123, and an elastic member 1124. The holding member 1121 is used to provide a receiving space for accommodating the cartridge 111. The first engaging member 1122 is installed on the holding member 1121 and cannot move relative to the holding member 1121. The second engaging member 1123 is releasably engaged with the first engaging member 1122 and can move relative to the first engaging member 1122. The elastic member 1124 is disposed between the first engaging member 1122 and the second engaging member 1123 and is used to give the second engaging member 1123 the potential energy to push the piston 1112 to slide relative to the cartridge body 1111. As Figures 1 to 4 shown, when the cartridge device 11 slides relative to the syringe body 12 in the first direction D1, the second engaging member 1123 can be driven by the abutting member 121 to rotate in the rotation direction R to disengage from the first engaging member 1122. After the second engaging member 1123 is driven by the abutting member 121 to rotate in the rotation direction R to disengage from the first engaging member 1122, the second engaging member 1123 can be further driven by the elastic member 1124 to push the piston 1112 to slide relative to the cartridge body 1111 in the first direction D1 (that is, after the second engaging member 1123 is driven by the abutting member 121 to rotate in the rotation direction R to disengage from the first engaging member 1122, the elastic member 1124 can indirectly apply a disengaging force to the piston 1112 through the second engaging member 1123 to overcome the resistance between the piston 1112 and the cartridge body 1111).

[0062] In this embodiment, as Figures 1 to 4 shown, the holding member 1121 includes a first end E1 and a second end E2 opposite to the first end E1. The first end E1 is formed with an insertion portion H. The insertion portion H is used to allow the insertion member 123 to be inserted into the cartridge body 1111. The first engaging member 1122 is located near the second end E2. Specifically, the insertion portion H includes a perforated structure. When the cartridge device 11 is slidably installed on the syringe body 12, the insertion member 123 can pass through the perforated structure of the insertion portion H and be inserted into the cartridge body 1111.

[0063] As Figures 2 to 4As shown, in order to position the first fitting 1122 on the holding member 1121, the first fitting 1122 includes a first locking structure 1122A, and the holding member 1121 includes a second locking structure 1121A. The second locking structure 1121A is formed at the second end E2 of the holding member 1121 and is used to engage with the first locking structure 1122A to restrict the first fitting 1122 so that the first fitting 1122 cannot move relative to the holding member 1121. In this embodiment, the first locking structure 1122A and the second locking structure 1121A can be a locking ear and a locking recess respectively, but the present invention is not limited to this embodiment.

[0064] In addition, the second fitting 1123 is at least partially movably disposed between the first end E1 of the first fitting 1122 and the holding member 1121. The elastic member 1124 is at least partially received between the first fitting 1122 and the second fitting 1123 and is used to give the second fitting 1123 the potential energy to push the piston 1112 to slide. In this embodiment, the second fitting 1123 can be at least partially movably disposed between the first fitting 1122 and the piston 1112, and the two ends of the elastic member 1124 can be respectively received in the first fitting 1122 and the second fitting 1123, but the present invention is not limited to this embodiment.

[0065] As Figures 2 to 4 shown, the first fitting 1122 further includes a first engaging structure 1122B, and the second fitting 1123 includes a second engaging structure 1123A. The second engaging structure 1123A can engage with the first engaging structure 1122B to restrict the second fitting 1123 so that the second fitting 1123 will not be driven by the elastic member 1124 along the first direction D1. When the second fitting 1123 is driven by the abutting member 121 to rotate in the rotation direction R, the second engaging structure 1123A can disengage from the first engaging structure 1122B to allow the second fitting 1123 to be driven by the elastic member 1124 along the first direction D1. In this embodiment, the first engaging structure 1122B and the second engaging structure 1123A can be a stepped recess and a stepped protrusion respectively, but the present invention is not limited to this embodiment.

[0066] Furthermore, as Figures 2 to 4As shown, in order for the abutting member 121 to drive the second fitting member 1123 to rotate in the rotation direction R, the second fitting member 1123 includes a fitting structure 1123B, and the fitting structure 1123B includes an inclined surface S. When the cartridge device 11 is installed on the syringe body 12, the abutting member 121 can abut against the inclined surface S in the second direction D2 opposite to the first direction D1 to drive the second fitting member 1123 to rotate in the rotation direction R. Specifically, the fitting structure 1123B is at least partially exposed outside the holding member 1121, so that the abutting member 121 can abut against the inclined surface S unobstructed to drive the second fitting member 1123 to rotate in the rotation direction R. In this embodiment, the holding member 1121 includes a slotted structure 1121B, and the fitting structure 1123B can be at least partially exposed outside the holding member 1121 through the slotted structure 1121B. Specifically, the slotted structure 1121B extends along the long axis direction of the holding member 1121, wherein the long axis direction of the holding member 1121 is parallel to the first direction D1. The slotted structure 1121B includes a guiding portion P1 and an exposing portion P2 connected to the guiding portion P1 and located near the second end E2 of the holding member 1121. The fitting structure 1123B is at least partially exposed outside the holding member 1121 through the exposing portion P2.

[0067] Please refer to Figures 5 to 10 , Figure 5 which is a schematic view of the injection system 1 of the embodiment of the present invention in the first use state, Figure 6 and is a partial structural schematic view of the cartridge device 11 of the embodiment of the present invention when the injection system 1 is in the first use state, Figure 7 which is a schematic view of the injection system 1 of the embodiment of the present invention in the second use state, Figure 8 and is a partial structural schematic view of the cartridge device 11 of the embodiment of the present invention when the injection system 1 is in the second use state, Figure 9 which is a schematic view of the injection system 1 of the embodiment of the present invention in the third use state, Figure 10 and is a partial structural schematic view of the cartridge device 11 of the embodiment of the present invention when the injection system 1 is in the third use state. The following will describe the operation of the present invention in detail. When the cartridge device 11 is installed on the syringe body 12, the abutting member 121 slides along the slotted structure 1121B from the guiding portion P1 of the slotted structure 1121B to the exposing portion P2 of the slotted structure 1121B and abuts against the inclined surface S of the fitting structure 1123B, so that the second fitting member 1123 is driven to rotate in the rotation direction R from the Figure 5 and Figure 6 shown engaging position L1 to the Figure 7 and Figure 8 shown disengaging position L2 to disengage from the first fitting member 1122. When the second fitting member 1123 rotates to the Figure 7 and Figure 8After the shown disengaged position L2, the second engaging member 1123 can be driven by the elastic member 1124 to move in the first direction D1 from the initial position K1 as shown in Figure 7 and Figure 8 to the predetermined position K2 as shown in Figure 9 and Figure 10 so as to push against the piston 1112 to slide relative to the cartridge 1111 in the first direction D1 (that is, after the second engaging member 1123 rotates to the disengaged position L2 as shown in Figure 7 and Figure 8 ), the elastic member 1124 can indirectly apply a disengaging force to the piston 1112 through the second engaging member 1123 to overcome the resistance between the piston 1112 and the cartridge 1111), thereby preventing the piston 1112 from being stuck to ensure normal drug delivery.

[0068] Compared with the prior art, the present invention uses the abutting member to drive the second engaging member to rotate and disengage from the first engaging member, and after the second engaging member disengages from the first engaging member, the elastic member is further used to drive the second engaging member to push against the piston to slide relative to the cartridge in the first direction (that is, after the second engaging member disengages from the first engaging member, the elastic member indirectly applies a disengaging force to the piston through the second engaging member to overcome the resistance between the piston and the cartridge), so the present invention has the advantages of simple structure and convenient operation.

[0069] The above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. A medicine box holder for a medicine box having a box body and a piston, characterized in that: The medicine box holder comprises: A holding member for accommodating the medicine box; A first matching member, mounted on the holding member and unable to move relative to the holding member; a second matching piece, movable relative to the first matching piece, the second matching piece being disengaged from the first matching piece by rotating; and The elastic member is disposed between the first fitting member and the second fitting member. After the second fitting member is disengaged from the first fitting member by rotating, the elastic member is used to drive the second fitting member to push the piston to slide relative to the cartridge body along the first direction.

2. The medicine box holder according to claim 1, characterized in that: The retaining member includes a first end and a second end opposite to the first end, the first end is formed with an inserting portion, the inserting portion is used to allow the insertion of the inserting member, and the first matching member is located close to the second end.

3. The medicine box holder according to claim 2, characterized in that: The second matching component is at least partially movably disposed between the first matching component and the first end of the holding component.

4. The medicine box holder according to claim 1, characterized in that: The elastic member is at least partially accommodated in one of the first matching member and the second matching member.

5. The medicine box holder according to claim 1, characterized in that: The second matching member includes a matching structure, the matching structure includes an inclined surface, and when the inclined surface is abutted along a second direction opposite to the first direction, the second matching member is driven to rotate.

6. The medicine box holder according to claim 5, characterized in that: The matching structure is at least partially exposed from the retaining member.

7. The medicine box holder according to claim 6, characterized in that: The retaining member includes a slot structure, and the matching structure is at least partially exposed from the retaining member through the slot structure.

8. The medicine box holder according to claim 7, characterized in that: The slot structure extends along the long axis direction of the holding component, and includes a guiding portion and an exposed portion connected to the guiding portion, and the matching structure is at least partially exposed to the holding component through the exposed portion.

9. The medicine box holder according to claim 1, characterized in that: The first matching piece includes a first engaging structure, and the second matching piece includes a second engaging structure. The second engaging structure is used to engage with the first engaging structure, and when the second matching piece rotates, the second engaging structure is driven to disengage from the first engaging structure.

10. The medicine box holder according to claim 1, characterized in that: The first matching piece includes a first locking structure, the holding piece includes a second locking structure, and the second locking structure is used to engage with the first locking structure, thereby restricting the first matching piece so that the first matching piece cannot move relative to the holding piece.

11. An injection system, characterized in that: Contains: The syringe body includes an abutment member; and A medicine box device is detachably mounted on the syringe body, and the medicine box device comprises: Medicine box, containing: a casing; and a piston slidable relative to the cartridge body; and A medicine box holder, used to hold the medicine box, the medicine box holder comprises: A holding member for accommodating the medicine box; A first matching member, mounted on the holding member and unable to move relative to the holding member; a second mating member movable relative to the first mating member, wherein when the cartridge device slides relative to the syringe body along a first direction, the abutment member drives the second mating member to rotate and disengage from the first mating member; and The elastic member is disposed between the first fitting member and the second fitting member. After the abutment member drives the second fitting member to rotate and disengage from the first fitting member, the elastic member is used to drive the second fitting member to push the piston to slide relative to the cartridge body along the first direction.

12. The injection system according to claim 11, characterized in that: The retaining member includes a first end and a second end opposite to the first end, the first end is formed with an inserting portion, the inserting portion is used to allow the insertion of the inserting member, and the first matching member is located close to the second end.

13. The injection system according to claim 12, characterized in that: The second matching component is at least partially movably disposed between the first matching component and the first end of the holding component.

14. The injection system according to claim 11, characterized in that: The elastic member is at least partially accommodated in one of the first matching member and the second matching member.

15. The injection system according to claim 11, characterized in that: The second matching member includes a matching structure, and the matching structure includes an inclined surface. When the inclined surface is abutted by the abutting member along a second direction opposite to the first direction, the second matching member is driven to rotate.

16. The injection system according to claim 15, characterized in that: The matching structure is at least partially exposed from the retaining member.

17. The injection system according to claim 16, characterized in that: The retaining member includes a slot structure, and the matching structure is at least partially exposed from the retaining member through the slot structure.

18. The injection system according to claim 17, characterized in that: The slot structure extends along the long axis direction of the holding component, and includes a guiding portion and an exposed portion connected to the guiding portion, and the matching structure is at least partially exposed to the holding component through the exposed portion.

19. The injection system according to claim 11, characterized in that: The first matching piece includes a first engaging structure, and the second matching piece includes a second engaging structure. The second engaging structure is used to engage with the first engaging structure, and when the second matching piece rotates, the second engaging structure is driven to disengage from the first engaging structure.

20. The injection system according to claim 11, characterized in that: The first matching piece includes a first locking structure, the holding piece includes a second locking structure, and the second locking structure is used to engage with the first locking structure, thereby restricting the first matching piece so that the first matching piece cannot move relative to the holding piece.

Images