Quick connect locking mechanism and pre-filled syringe

Abstract

The utility model relates to injection device field, concretely is a kind of quick connection locking mechanism and pre-filled sealed syringe, the quick connection locking mechanism includes medicine bin and host, host includes middle ring and medicine bin limiting ring, medicine bin limiting ring is set in middle ring, medicine bin is inserted into middle ring and is connected with medicine bin limiting ring, and drive medicine bin limiting ring and make rotational movement from starting position to terminal position along the inside of middle ring, so that medicine bin is clamped in middle ring and is connected with host. The utility model's medicine bin cooperation drive medicine bin limiting ring and rotate along the inside of middle ring can realize installation and disassembly, overall structure is simple, process is fast and convenient.

Description

Technical Field

[0001] This utility model relates to the field of injection devices, specifically a quick-connect locking mechanism and a pre-filled syringe. Background Technology

[0002] Disposable pre-filled syringes are currently a commonly used product in the self-medication system field, with a large user market. Disposable pre-filled syringes eliminate the need to draw medication from the vial into the syringe, reducing administration time and minimizing waste.

[0003] A disposable pre-filled syringe typically consists of a main unit and a cartridge. The main unit is designed to be reusable with a motor and battery, while the cartridge is designed for single-use. The cartridge contains a disposable pre-filled vial, and the cartridge is detachably connected to the main unit for easy replacement of the pre-filled vial. Therefore, a quick, stable, and reliable connection and disassembly structure between the cartridge and the main unit is crucial. Utility Model Content

[0004] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a quick connection and locking mechanism and a pre-filled syringe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-connect locking mechanism, comprising a medicine compartment and a main unit, wherein the main unit comprises a middle ring and a medicine compartment limiting ring, and the medicine compartment limiting ring is disposed within the middle ring;

[0006] The medicine container is inserted into the middle ring and connected to the medicine container limiting ring. The medicine container limiting ring rotates along the inner side of the middle ring from the starting position to the ending position, so that the medicine container is locked in the middle ring and connected to the main unit.

[0007] The present invention is further configured such that: the medicine container includes a medicine container shell, the top of the medicine container shell is provided with an alignment groove, the bottom of the alignment groove is provided with a first sliding protrusion, the first sliding protrusion protrudes from the medicine container shell; the alignment groove and the first sliding protrusion are symmetrically arranged in two sets with the center of the medicine container shell as the center.

[0008] The present invention is further configured such that: the medicine compartment limiting ring includes a second sliding convex hull and an alignment convex hull, the alignment convex hull is disposed at the bottom of the medicine compartment limiting ring, and the second sliding convex hull is disposed on the outer side of the alignment convex hull;

[0009] The shape and position of the alignment convex hull match the shape and position of the alignment groove.

[0010] During actual installation, the medicine chamber is inserted into the middle ring, and the alignment protrusion of the medicine chamber limiting ring is engaged in the alignment groove of the medicine chamber shell. Rotating the medicine chamber will drive the medicine chamber limiting ring to rotate, at which time the first slider protrusion and the second slider protrusion will come into contact.

[0011] The present invention is further configured such that: a sliding track is provided on the side wall of the middle ring, a medicine tank insertion track is provided on the inner side of the side wall of the middle ring, and a threaded connecting stop surface is provided on the top of the inner side of the middle ring; the sliding track includes a starting section, and the medicine tank insertion track is connected to the starting section;

[0012] The outer wall of the top of the medicine tank limiting ring is also provided with a threaded limiting ring stop surface. The medicine tank limiting ring is threadedly connected to the middle ring through the limiting ring stop surface, and in the initial state, the second sliding convex hull extends into the starting section of the sliding track.

[0013] The present invention is further configured such that: the sliding track includes a transition section and a termination section; the termination section is positioned higher than the starting section, and the termination section and the starting section are connected by an inclined transition section.

[0014] During actual installation, the first slider protrusion of the medicine compartment is inserted into the middle ring along the medicine compartment insertion track, and the alignment protrusion of the medicine compartment limiting ring is engaged in the alignment groove of the medicine compartment shell. Rotating the medicine compartment will drive the medicine compartment limiting ring to rotate along the sliding track.

[0015] Because the inner wall of the middle ring is thicker than the insertion track of the medicine container, after rotating out of the starting section, the medicine container can be engaged in the transition or end section of the sliding track by the first sliding protrusion. As the rotation continues, due to the threaded connection between the middle ring and the medicine container limiting ring, the position of the medicine container and the medicine container limiting ring will gradually rise relative to the middle ring until it is fixed after rotating to the end section. At this time, the limiting ring stop surface of the medicine container limiting ring and the connecting stop surface of the middle ring are in a tightly screwed state.

[0016] The present invention is further configured such that: the quick connection and locking mechanism also includes a haptic feedback mechanism, which includes a haptic feedback convex hull and a haptic feedback groove;

[0017] The tactile feedback convex bulge is an elastic structure and is disposed on the outer wall of the medicine compartment limiting ring; the shapes of the tactile feedback convex bulge and the tactile feedback groove are matched.

[0018] The tactile feedback groove includes a first feedback groove and a second feedback groove. When the second sliding protrusion of the medicine tank limiting ring is located in the starting section, the first feedback groove is provided on the inner wall of the middle ring corresponding to the tactile feedback protrusion. When the second sliding protrusion of the medicine tank limiting ring is located in the ending section, the second feedback groove is provided on the inner wall of the middle ring corresponding to the tactile feedback protrusion.

[0019] The present invention is further configured such that the tactile feedback convex hull has a triangular convex structure, including two asymmetrical inclined thin surfaces.

[0020] The present invention is further configured such that: the angle range of the inclined thin surface in the rotational installation direction of the tactile feedback convex bulge is 15°-30°; and the angle range of the inclined thin surface in the rotational removal direction is 50°-70°.

[0021] The haptic feedback structure is designed as a locally thin-walled elastic structure that can elastically deform during movement. The clockwise rotating mounting ramp is set with a small acute angle, requiring less force to overcome the deformation of the elastic wall. The counterclockwise rotating disassembly ramp is set with a larger acute angle, requiring greater force to overcome during disassembly. This provides the user with a second type of installation force feedback in addition to haptic feedback, enhancing the user experience.

[0022] The present invention is further configured such that: the quick-connect locking mechanism also has an activation feedback structure, the activation feedback structure includes a wake-up lever, a trigger switch and a buzzer, the host also includes a control component, the control component is installed on the top of the middle ring; a wake-up lever clearance groove is opened on the top of the middle ring, the wake-up lever is set on the medicine compartment limiting ring and extends out of the wake-up lever clearance groove;

[0023] The trigger switch and buzzer are mounted on the control assembly, with the trigger switch located at the end position of the wake-up lever.

[0024] When the medicine cartridge drives the medicine cartridge limit ring to rotate from the starting section to the ending section, the wake-up lever will activate the trigger switch set on the PCBA. The function of this switch is to wake up the host control component in the dormant state and put it into the injection ready state. Simultaneously, the buzzer set on the host will sound to remind the user that the medicine cartridge is installed in place.

[0025] The present invention is further configured such that: the host also includes a host housing, the inner wall of the host housing is provided with a middle ring limiting groove, the outer wall of the middle ring is provided with a middle ring limiting rib that cooperates with the middle ring limiting groove, and the middle ring and the host housing are fixed by ultrasonic welding.

[0026] This utility model also relates to a pre-filled syringe, including the aforementioned quick-connect locking mechanism.

[0027] In summary, the beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0028] 1. The medicine container of this utility model can be installed and disassembled by rotating the medicine container limiting ring along the inner side of the middle ring; the structure is simple and the process is quick and convenient.

[0029] 2. The medicine compartment limiting ring and the middle ring are respectively equipped with a second stop structure, namely the limiting ring stop surface of the medicine compartment limiting ring and the connecting stop surface of the middle ring, which provides double protection and locking position. The two are threadedly connected, providing auxiliary force to the medicine compartment during the rotation and disassembly action, improving the disassembly and user experience, and improving product quality.

[0030] 3. The convex humps of the tactile feedback structure with different tilt angles are designed so that the force required to overcome the deformation of the elastic wall during installation is smaller, and the force required to overcome during installation and removal is larger. This provides users with a second type of installation force feedback in addition to tactile feedback, thus improving the user experience.

[0031] 4. After the medicine compartment is installed, the user can use the wake-up lever to trigger the switch, which will automatically wake up the host and provide sound feedback indicating that the installation is complete. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is an axonometric view of the medicine container of the present invention;

[0034] Figure 2 This is an isometric view of the drug compartment limiting ring of the present invention;

[0035] Figure 3 This is a schematic diagram of the outer ring in this invention;

[0036] Figure 4 This is a schematic diagram of the interior of the ring in this invention;

[0037] Figure 5 This is a schematic diagram of the stop surface of the limit ring;

[0038] Figure 6 This is an isometric view of the main body casing of the present invention;

[0039] Figure 7 An isometric view of the initial installation with the alignment grooves and protrusions in place (hiding the outer casing and the middle ring);

[0040] Figure 8 for Figure 7 Enlarged view of a portion of point A in the middle;

[0041] Figure 9 The isometric view (without the outer shell) of the medicine tank and medicine tank limiting ring when they rotate to the termination segment after the medicine tank and main unit of the present invention are installed;

[0042] Figure 10for Figure 9 Enlarged view of a section at point B in the middle;

[0043] Figure 11 This is a partial cross-sectional view of the main unit when the medicine compartment limiting ring set in the middle ring of the present invention is in the initial segment;

[0044] Figure 12 This is a partial cross-sectional view of the main unit when the drug compartment limiting ring set within the middle ring of the present invention is in the termination section;

[0045] Figure 13 This is a schematic diagram showing the position of the wake-up lever relative to the trigger switch during the initial segment of the drug compartment limiting ring of the present invention;

[0046] Figure 14 This is a schematic diagram showing the position of the trigger switch activated by the wake-up lever when the medicine compartment limiting ring of the present invention is in the termination segment.

[0047] The attached diagram lists the components represented by each number as follows:

[0048] 1. Medicine compartment; 1-1. First sliding convex hull; 1-2. Alignment groove;

[0049] 2. Middle ring; 2-1. Sliding track; 2-11. Starting section; 2-12. Transition section; 2-13. Ending section; 2-2. Medicine compartment insertion track; 2-3. Tactile feedback groove; 2-4. Connecting stop surface; 2-5. Wake-up lever clearance groove; 2-6. Middle ring limiting rib;

[0050] 3. Medicine compartment limiting ring; 3-1. Second sliding convex hull; 3-2. Alignment convex hull; 3-3. Tactile feedback convex hull; 3-4. Limiting ring stop surface; 3-5. Wake-up lever.

[0051] 4. Main unit, 4-1. Middle ring limit groove, 4-2. Trigger switch. Detailed Implementation

[0052] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this utility model, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the protection scope of this utility model. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the scope of this utility model.

[0053] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0054] Example 1:

[0055] like Figures 1-14 As shown, this is a preferred embodiment of the present invention, a quick-connect locking mechanism, including a medicine compartment 1 and a main unit 4, wherein the main unit 4 includes a middle ring 2 and a medicine compartment limiting ring 3, and the medicine compartment limiting ring 3 is disposed inside the middle ring 2;

[0056] The medicine container 1 is inserted into the middle ring 2 and connected to the medicine container limiting ring 3. The medicine container limiting ring 3 is driven to rotate along the inner side of the middle ring 2 from the starting position to the ending position, so that the medicine container 1 is locked in the middle ring 2 and connected to the main unit 4.

[0057] like Figure 1 As shown, the medicine container 1 includes a medicine container shell. The top of the medicine container shell is provided with an alignment groove 1-2, and the bottom of the alignment groove 1-2 is provided with a first sliding protrusion 1-1. The first sliding protrusion 1-1 protrudes from the medicine container shell. The alignment groove 1-2 and the first sliding protrusion 1-1 are symmetrically arranged in two sets with the center of the medicine container shell as the center.

[0058] like Figure 2 As shown, the medicine compartment limiting ring 3 includes a second sliding convex 3-1 and an alignment convex 3-2. The alignment convex 3-2 is disposed at the bottom of the medicine compartment limiting ring 3, and the second sliding convex 3-1 is disposed on the outer side of the alignment convex 3-2.

[0059] The shape and position of the alignment protrusion 3-2 match the shape and position of the alignment groove 1-2.

[0060] During actual installation, the medicine chamber 1 is inserted into the middle ring 2, and the alignment protrusion 3-2 of the medicine chamber limiting ring 3 is engaged in the alignment groove 1-2 of the medicine chamber shell. Rotating the medicine chamber 1 will drive the medicine chamber limiting ring 3 to rotate. At this time, the first slider protrusion 1-1 and the second slider protrusion 3-1 are in contact.

[0061] Combination Figures 3-5 , Figure 10 As shown, the side wall of the middle ring 2 is provided with a sliding track 2-1, and the inner side of the side wall of the middle ring 2 is provided with a medicine tank insertion track 2-2. The top of the inner side of the middle ring 2 is provided with a threaded connecting stop surface 2-4. The sliding track 2-1 includes a starting section 2-11, and the medicine tank insertion track 2-2 is connected to the starting section 2-11.

[0062] The outer wall of the top of the medicine tank limiting ring 3 is also provided with a threaded limiting ring stop surface 3-4. The medicine tank limiting ring 3 is threadedly connected to the middle ring through the limiting ring stop surface 3-4, and in the initial state, the second sliding protrusion 3-1 extends into the starting section 2-11 of the sliding track 2-1.

[0063] The limiting ring stop surface 3-4 and the connecting stop surface 2-4 are spiral surfaces.

[0064] The sliding track 2-1 further includes a transition section 2-12 and a termination section 2-13; the termination section 2-13 is positioned higher than the starting section 2-11, and the termination section 2-13 and the starting section 2-11 are connected by the inclined transition section 2-12.

[0065] like Figures 7-10 As shown, during actual installation, the first slider protrusion 1-1 of the medicine chamber 1 is inserted into the middle ring 2 along the medicine chamber insertion track 2-2, and the alignment protrusion 3-2 of the medicine chamber limiting ring 3 is engaged in the alignment groove 1-2 of the medicine chamber shell. Rotating the medicine chamber 1 will drive the medicine chamber limiting ring 3 to rotate along the sliding track 2-1.

[0066] Since the inner wall of the middle ring 2 is thicker than the medicine container insertion track 2-2, after rotating out of the starting section 2-11, the medicine container 1 can be engaged in the transition section 2-12 or the ending section 2-13 of the sliding track 2-1 through the first sliding protrusion 1-1; as it continues to rotate, due to the threaded connection between the middle ring 2 and the medicine container limiting ring 3, the position of the medicine container 1 and the medicine container limiting ring 3 will gradually rise relative to the middle ring 2 until they are fixed after rotating to the ending section 2-13. At this time, the limiting ring stop surface 3-4 of the medicine container limiting ring 3 and the connecting stop surface 2-4 of the middle ring 2 are in a tightly screwed state.

[0067] Combination Figures 11-12 As shown, the quick-connect locking mechanism also includes a haptic feedback mechanism, which includes a haptic feedback convex 3-3 and a haptic feedback groove 2-3;

[0068] The tactile feedback protrusion 3-3 is an elastic structure and is set on the outer wall of the medicine compartment limiting ring 3; the shapes of the tactile feedback protrusion 3-3 and the tactile feedback groove 2-3 are matched.

[0069] The tactile feedback groove 2-3 includes a first feedback groove and a second feedback groove. When the second sliding protrusion 3-1 of the medicine tank limiting ring 3 is located at the starting segment 2-11, the first feedback groove is provided at the inner wall of the middle ring 2 corresponding to the tactile feedback protrusion 3-3. When the second sliding protrusion 3-1 of the medicine tank limiting ring 3 is located at the ending segment 2-13, the second feedback groove is provided at the inner wall of the middle ring 2 corresponding to the tactile feedback protrusion 3-3.

[0070] The haptic feedback convex hull 3-3 has a triangular convex structure, including two asymmetrical inclined thin surfaces.

[0071] The angle range of the inclined thin surface of the tactile feedback protrusion 3-3 in the rotational installation direction is 15°-30°; the angle range of the inclined thin surface in the rotational removal direction is 50°-70°.

[0072] The haptic feedback mechanism is designed as a locally thin-walled elastic structure that can elastically deform during movement. The clockwise rotating mounting ramp is set with a small acute angle, requiring less force to overcome the deformation of the elastic wall. The counterclockwise rotating disassembly ramp is set with a larger acute angle, requiring greater force to be overcome during disassembly of the medicine compartment 1. This provides the user with a second type of installation force feedback in addition to haptic feedback, enhancing the user experience.

[0073] like Figures 13-14 As shown, the quick-connect locking mechanism also has an activation feedback structure, which includes a wake-up lever 3-5, a trigger switch 4-2, and a buzzer. The host 4 also includes a control component, which is installed on the top of the middle ring 2. A wake-up lever clearance groove 2-5 is opened on the top of the middle ring 2, and the wake-up lever 3-5 is set on the medicine compartment limiting ring 3 and extends out of the wake-up lever clearance groove 2-5.

[0074] The trigger switch 4-2 and the buzzer are mounted on the control assembly, with the trigger switch 4-2 located at the end position of the wake-up lever 3-5.

[0075] When the medicine container 1 drives the medicine container limit ring 3 to rotate from the starting section to the ending section, the wake-up lever 3-5 will activate the trigger switch 4-2 set on the PCBA. The function of the trigger switch 4-2 is to wake up the host control component in the dormant state and put it into the injection ready state. At the same time, the buzzer set on the host 4 will sound to remind the user that the medicine container is installed in place.

[0076] like Figure 6 As shown, the host 4 also includes a host housing, the inner wall of which is provided with a middle ring limiting groove 4-1, and the outer wall of the middle ring 2 is provided with a middle ring limiting rib 2-6 that cooperates with the middle ring limiting groove 4-1. The middle ring 2 and the host housing are fixed by ultrasonic welding.

[0077] Example 2:

[0078] A pre-filled syringe includes the quick-connect locking mechanism described in Example 1.

[0079] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A quick-connect locking mechanism, comprising a medicine compartment and a main unit, characterized in that, The host includes a central ring and a drug compartment limiting ring, wherein the drug compartment limiting ring is disposed within the central ring; The medicine container is inserted into the middle ring and connected to the medicine container limiting ring. The medicine container limiting ring rotates along the inner side of the middle ring from the starting position to the ending position, so that the medicine container is locked in the middle ring and connected to the main unit.

2. The quick-connection locking mechanism according to claim 1, characterized in that, The medicine container includes a medicine container shell, the top of which is provided with an alignment groove, and the bottom of which is provided with a first sliding protrusion, the first sliding protrusion protruding from the medicine container shell; the alignment groove and the first sliding protrusion are symmetrically arranged in two sets with the center of the medicine container shell as the center.

3. The quick-connect locking mechanism according to claim 2, characterized in that, The drug compartment limiting ring includes a second sliding convex hull and an alignment convex hull. The alignment convex hull is disposed at the bottom of the drug compartment limiting ring, and the second sliding convex hull is disposed on the outer side of the alignment convex hull. The shape and position of the alignment convex hull match the shape and position of the alignment groove.

4. The quick-connection locking mechanism according to claim 3, characterized in that, The middle ring has a sliding track on its side wall, and a medicine cartridge insertion track is provided on the inner side of the middle ring. The top of the inner side of the middle ring has a threaded connection stop surface. The sliding track includes a starting section, and the medicine cartridge insertion track is connected to the starting section. The outer wall of the top of the medicine tank limiting ring is also provided with a threaded limiting ring stop surface. The medicine tank limiting ring is threadedly connected to the middle ring through the limiting ring stop surface, and in the initial state, the second sliding convex hull extends into the starting section of the sliding track.

5. The quick-connect locking mechanism according to claim 4, characterized in that, The sliding track further includes a transition section and a termination section; the termination section is positioned higher than the starting section, and the termination section and the starting section are connected by an inclined transition section.

6. The quick-connect locking mechanism according to claim 5, characterized in that, The quick-connect locking mechanism also includes a haptic feedback mechanism, which includes a haptic feedback convex hull and a haptic feedback groove; The tactile feedback convex bulge is an elastic structure and is disposed on the outer wall of the medicine compartment limiting ring; the shapes of the tactile feedback convex bulge and the tactile feedback groove are matched. The tactile feedback groove includes a first feedback groove and a second feedback groove. When the second sliding protrusion of the medicine tank limiting ring is located in the starting section, the first feedback groove is provided on the inner wall of the middle ring corresponding to the tactile feedback protrusion. When the second sliding protrusion of the medicine tank limiting ring is located in the ending section, the second feedback groove is provided on the inner wall of the middle ring corresponding to the tactile feedback protrusion.

7. The quick-connect locking mechanism according to claim 6, characterized in that, The haptic feedback convex hull has a triangular convex structure, including two asymmetrical inclined thin surfaces.

8. The quick-connect locking mechanism according to claim 7, characterized in that, The angle range of the inclined thin surface in the rotational installation direction of the tactile feedback convex bulge is 15°-30°; the angle range of the inclined thin surface in the rotational removal direction is 50°-70°.

9. The quick-connect locking mechanism according to claim 1, characterized in that, The quick-connect locking mechanism also includes a start-up feedback structure, which includes a wake-up lever, a trigger switch, and a buzzer. The host also includes a control component, which is installed on the top of the middle ring. A wake-up lever clearance groove is provided on the top of the middle ring, and the wake-up lever is set on the medicine compartment limiting ring and extends out of the wake-up lever clearance groove. The trigger switch and buzzer are mounted on the control assembly, with the trigger switch located at the end position of the wake-up lever.

10. A pre-filled syringe, characterized in that, Includes the quick-connect locking mechanism as described in any one of claims 1-9.

Images