Fluid dispensing device and method of use thereof
The fluid dispensing device addresses the inefficiencies of conventional devices by providing precise and efficient fluid distribution with interchangeable cartridges, minimizing waste and surgical costs.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- MEDIFABRICA LTD
- Filing Date
- 2023-07-24
- Publication Date
- 2026-07-23
AI Technical Summary
Conventional fluid delivery devices are wasteful and imprecise, leading to increased surgical costs and accidental administration of large fluid volumes due to their fixed volume and difficulty in controlling flow rates.
A fluid dispensing device with a slidable drug cylinder and trigger mechanism that allows precise distribution of varying fluid volumes at a uniform flow rate, enabling complete administration before replacement.
Enables accurate and efficient fluid distribution to surgical targets, preventing accidental over-administration and reducing waste by allowing interchangeable drug cartridges.
Smart Images
Figure 2026524659000001_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of surgical instruments, and more particularly to fluid delivery devices and methods of using the same.
Background Art
[0002] In surgery, it is often necessary to administer a certain volume of fluid (e.g., a drug solution) to a target location (e.g., a lesion in the human body) using a fluid delivery device. Conventional fluid delivery devices are basically disposable devices, and since such devices have a predetermined volume, they can only administer a predetermined volume of fluid at a time. If the volume of fluid to be administered is smaller than the predetermined volume, waste of fluid occurs and the surgical cost may increase. Therefore, conventional disposable fluid delivery devices often have a relatively small predetermined volume. If the required volume of fluid is larger than the predetermined volume, multiple fluid delivery devices will be used, which is also wasteful and increases the surgical cost.
[0003] Furthermore, being a disposable device, the user cannot precisely control the volume of fluid administered and distributed to the target location. To enable the user to control the volume of fluid to be distributed, fluid delivery devices including syringes have been proposed, but in such devices including syringes, it is difficult for the user to distribute the fluid at a uniform flow rate. Furthermore, if "slippage" occurs in the syringe, a large amount of fluid may be unexpectedly administered to the target location.
Summary of the Invention
Problems to be Solved by the Invention
[0004] In view of the above circumstances, in response to the above technical problems, there is a need to provide a fluid delivery device and a method of using the same that can accurately administer and distribute different volumes of fluid required for surgery to a target location and prevent a large amount of fluid from being unexpectedly administered to the target location.
Means for Solving the Problems
[0005] According to one aspect of the present invention, a fluid dispensing device is provided, comprising: a housing having a mounting opening and a housing cavity located inside it, the mounting opening and the housing cavity communicating; a drug cylinder inserted into the mounting opening and removably mounted within the housing cavity, and configured to be slidable within the housing cavity between a first axial position and a second axial position along the axial direction; and a trigger device provided on the housing and operably connected to the drug cylinder, the trigger device being able to drive the drug cylinder to slide from a first axial position to a second axial position, and as the drug cylinder slides from the first axial position to the second axial position, the drug cylinder gradually enters the housing cavity.
[0006] In the fluid administration device according to the embodiment of the present invention, a trigger device drives the drug cylinder to slide from a first axial position to a second axial position, thereby gradually distributing the fluid at a uniform flow rate. This allows for the precise administration and distribution of different volumes of fluid required for surgery to the target location, while preventing the accidental administration of large amounts of fluid to the target location. When the drug cylinder reaches the second axial position, the drug solution inside the cylinder is completely distributed. By replacing the drug cylinder, continuous distribution of the drug solution becomes possible.
[0007] In one embodiment, the fluid dispensing device further includes an end cap connected to a mounting port. The end cap includes a through hole into which a drug cylinder is inserted and removably mounted within a housing cavity, and into which the drug cylinder can rotate between a first rotational position and a second rotational position, and a first projection projecting from the inner wall of the through hole. The drug cylinder includes a first groove provided on the outer wall of the drug cylinder, extending axially, and having a second projection, and a second groove provided on the outer wall of the drug cylinder, extending parallel to the first groove. The first projection is slidable along the first groove or the second groove. When the drug cylinder is in the first rotational position, the first projection is located in the first groove. When the drug cylinder is in the second rotational position, the first projection is located in the second groove.
[0008] In one embodiment, when the drug cylinder is inserted into the through hole at a first rotational position and slides in the direction in which the drug cylinder enters the housing cavity until the first protrusion and the second protrusion come into contact, the drug cylinder reaches a first axial position. When the drug cylinder is in the first axial position and the first rotational position, the drug cylinder is rotated so that it enters a second rotational position and is operably connected to a trigger device.
[0009] In one embodiment, when the drug cylinder is in a second axial position and a second rotational position, the drug cylinder is rotated so that it enters a first rotational position, and the drug cylinder is disengaged from the operable connection with the trigger device.
[0010] In one embodiment, a first stepped surface is provided at one end of the first protrusion facing the mounting opening, and a second stepped surface is provided at one end of the second protrusion facing the second axial position, and the second stepped surface is configured to abut against the first stepped surface.
[0011] In one embodiment, a first inclined surface is provided at one end of the first protrusion facing the housing cavity, and a second inclined surface is provided at the other end of the second protrusion away from the second axial position. The second inclined surface is configured to cooperate with the first inclined surface to bias the first protrusion and release the second protrusion.
[0012] In one embodiment, a relief groove is provided on the first protrusion, and when the drug cylinder slides away from the containment cavity until the second protrusion contacts the first protrusion, the second protrusion biases the first protrusion toward the relief groove, causing the first protrusion to retract from the second protrusion, and the first protrusion to release the second protrusion.
[0013] In one embodiment, the fluid dispensing device further includes a first reset member provided within a containment cavity, which abuts against one end of the drug cylinder and biases the drug cylinder away from the containment cavity.
[0014] In one embodiment, the fluid dispensing device further includes a carriage, which is provided within a housing cavity, with one end of the carriage in contact with a drug cylinder and the other end of the carriage in contact with a first reset member, the first reset member biasing the carriage toward the drug cylinder.
[0015] In one embodiment, the carriage is provided with a third protrusion, the housing is provided with a through groove, the through groove extends in the axial direction, and the third protrusion penetrates the through groove and slides along the through groove.
[0016] In one embodiment, at least one first position restricting portion is provided on the inner wall of the through hole of the end cap, and at least one second position restricting portion is provided on the outer wall of the drug cylinder. When the first position restricting portion and the second position restricting portion are aligned in the axial direction, the drug cylinder can be inserted into the through hole at a first rotational position.
[0017] In one embodiment, the inner wall of the through hole is further provided with a accommodating section for housing a second position limiting section.
[0018] In one embodiment, the first position limiting portion is a recess, and the second position limiting portion is a convex portion. When the convex portion and the recess are aligned in the axial direction, the convex portion can enter the recess.
[0019] In one embodiment, the drug cylinder further includes a rack, which is provided on the outer wall of the drug cylinder and extends axially, and a gear set is provided in the housing cavity, and the drug cylinder is operably connected to a trigger device through the cooperation of the rack and the gear set.
[0020] According to another aspect of the present invention, a method of using the fluid dispensing device in the above-described embodiment is provided. This method of use is The steps include inserting the drug cylinder into the through-hole of the end cap at a first rotational position and aligning the first groove with the first through-hole, The first protrusion contacts the second protrusion, and the drug cylinder is pushed in the direction of entering the through hole until the drug cylinder reaches the first axial position. Rotating the drug cartridge so that the drug cartridge enters the second rotational position and operably connecting the drug cartridge to the trigger device; Operating the trigger device to drive the drug cartridge to slide toward the second axial position; When the drug cartridge reaches the second axial position, rotating the drug cartridge so that the drug cartridge enters the first rotational position and disengaging the drug cartridge from the connection with the trigger device; The first reset member slides the drug cartridge in the direction of detachment from the receiving cavity to the first axial position, and the first protrusion contacts the second protrusion; By urging the first inclined surface with the second inclined surface, the first protrusion releases the second protrusion, and the drug cartridge continues to slide in the direction of detachment from the receiving cavity until the drug cartridge is completely detached from the receiving cavity.
[0021] In one embodiment, before inserting the drug cartridge into the through hole of the end cap at the first rotational position and aligning the first groove and the first through hole, the method further includes axially aligning the first position restricting portion and the second position restricting portion.
[0022] The above and other objects, features, and advantages of the present application will become clearer from the more detailed description of the preferred embodiments of the present application shown in the accompanying drawings. In all the drawings, the same parts are denoted by the same reference numerals, and there are cases where they are not drawn to the same scale as the actual dimensions as long as it does not hinder the description of the gist of the present application.
[0023] Other features, objects, and advantages of the present application will become clearer by describing non-limiting embodiments in detail with reference to the following drawings.
Brief Description of the Drawings
[0024] [Figure 1] It is an exploded view schematically showing a part of a fluid administration device according to an embodiment of the present application, with a part of the housing omitted. [Figure 2] It is a schematic perspective view of the fluid administration device shown in FIG. 1. [Figure 3] This is a schematic perspective view of a medicine cartridge according to an embodiment of the present application. [Figure 4] This is another schematic perspective view of the medicine cartridge shown in FIG. 3. [Figure 5] This is a schematic side view of a fluid administration device according to an embodiment of the present application, with a part of the housing omitted, and the medicine cartridges in the first axial position and the second axial position are respectively shown. [Figure 6] This is a schematic perspective view of an end cap according to an embodiment of the present application. [Figure 7] This is a schematic rear view of a fluid administration device according to an embodiment of the present application, and the medicine cartridges located in the first rotational position and the second rotational position are respectively shown. [Figure 8] This is a schematic cross-sectional view of a medicine cartridge and an end cap according to an embodiment of the present application, with a part of the end cap omitted. [Figure 9] This is a partially enlarged view of part A in FIG. 8. [Figure 10] This is a schematic perspective view of a carriage according to an embodiment of the present application. [Figure 11] This is a schematic perspective view of a fluid administration device according to an embodiment of the present application, with the medicine cartridge and other components omitted. [Figure 12] This is a schematic configuration diagram of a medicine cartridge and an end cap according to an embodiment of the present application. [Figure 13] This is a schematic configuration diagram of a medicine cartridge and an end cap according to an embodiment of the present application. [Figure 14] This is a schematic configuration diagram of a medicine cartridge and an end cap according to an embodiment of the present application. [Figure 15] This is a schematic configuration diagram of a medicine cartridge, a trigger device, and a gear set according to an embodiment of the present application. [Figure 16] This is a schematic exploded view of a medicine cartridge, a trigger device, and a gear set according to an embodiment of the present application. [Figure 17] This is a schematic exploded view of a medicine cartridge, a trigger device, and a gear set according to an embodiment of the present application.
MODE FOR CARRYING OUT THE INVENTION
[0025] To facilitate understanding of this application, the application will be described in more detail below with reference to the drawings. The drawings show preferred embodiments of the application, but the application is not limited to the embodiments described herein and can be carried out in various different forms. The purpose of providing these embodiments is to make the disclosure of the application more thorough and comprehensive.
[0026] Note that when describing one element as "connected" to another, it may be directly connected to the other element, joined together as one, or connected via an intermediate element. The terms "attachment," "one end," "the other end," and similar expressions used herein are for illustrative purposes only.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Terms used herein are for illustrative purposes only and do not limit the application. The terms “and / or” as used herein include any combination of one or more related items, and all combinations thereof.
[0028] Referring to Figures 1 and 2, one embodiment of the present invention provides a fluid administration device 1 comprising a housing 10, a drug cylinder 20, a trigger device 30, and a fluid delivery pipe 80. The housing 10 is provided with a mounting port 101, and a housing cavity 102 is provided inside the housing 10, with the mounting port 101 communicating with the housing cavity 102. In Figures 1 and 2, a portion of the housing 10 is omitted to show the components inside the housing 10. The drug cylinder 20 is inserted into the mounting port 101 and is removably mounted inside the housing cavity 102. The drug cylinder 20 is configured to slide axially between a first axial position and a second axial position within the housing cavity 102. The drug cylinder 20 contains a predetermined volume of drug solution to be administered to a target location (e.g., a patient's lesion). The trigger device 30 is provided in the housing 10 and is operably connected to the drug cylinder 20. The user can drive the drug cylinder 20 to slide from a first axial position to a second axial position by operating the trigger device 30. As the drug cylinder 20 slides from the first axial position to the second axial position, the drug cylinder 20 gradually enters the containment cavity 102. The liquid delivery pipe 80 is for delivering the drug solution in the drug cylinder 20 to the target position. Selectively, the liquid delivery pipe 80 can be selected to have an appropriate length and inner diameter according to the actual needs. In this embodiment, after the drug solution in the drug cylinder 20 has been completely distributed to the target position, the drug cylinder 20 can be removed and replaced with a new drug cylinder 20.
[0029] Referring to Figures 1 and 5, the upper part of Figure 5 shows the drug cylinder 20 in the first axial position, where it has just been inserted into the mounting port 101 and the fluid dispensing device 1 has not yet begun distributing the drug solution in the drug cylinder 20 to the target position. The lower part of Figure 5 shows the drug cylinder 20 in the second axial position, where the drug solution in the drug cylinder 20 has been completely distributed to the target position. The drug cylinder 20 has a stroke T between the first axial position and the second axial position. As will be understood by those skilled in the art, the stroke T is related to the volume of the drug cylinder 20, and generally, drug cylinders with larger volumes have larger stroke T, and vice versa. Selectively, the stroke T is 27 mm.
[0030] Referring to Figures 1 and 2, in one embodiment, the fluid dispensing device 1 further includes an end cap 40 connected to the mounting port 101. The end cap 40 includes a through hole 401 and a first projection 402. A drug cylinder 20 passes through the through hole 401 and is removably mounted in the housing cavity 102. The drug cylinder 20 is rotatable between a first rotation position and a second rotation position. The first projection 402 protrudes from the inner wall of the through hole 401. In this embodiment, the drug cylinder 20 includes a first groove 201 and a second groove 203. The first groove 201 is provided on the outer wall of the drug cylinder 20 and extends axially. The first groove 201 is provided with a second projection 202. The second groove 203 is provided on the outer wall of the drug cylinder 20 and extends parallel to the first groove 201. The first protrusion 402 is configured to slide along the first groove 201 or the second groove 203. When the drug cylinder 20 is in the first rotation position, the first protrusion 402 is located in the first groove 201. When the drug cylinder 20 is in the second rotation position, the first protrusion 402 is located in the second groove 203.
[0031] Referring to Figures 3 and 4, in one embodiment, the drug cylinder 20 further includes an operating section 206. The user inserts the drug cylinder 20 into the through hole 401 by operating the operating section 206 and switches the drug cylinder 20 between a first rotation position and a second rotation position. In this embodiment, the operating section 206 is sheet-shaped. As those skilled in the art will understand, the operating section 206 may be selected in other appropriate shapes, such as rod-shaped or spherical, depending on the actual needs, and this application is not limited thereto. Referring together to Figures 2, 3 and 7, the left side of Figure 7 shows the drug cylinder 20 in the first rotation position, and the right side of Figure 7 shows the drug cylinder 20 in the second rotation position. In this embodiment, when the drug cylinder 20 is in the first rotation position, the angle between the operating section 206 and the horizontal direction is α, and when the drug cylinder 20 is in the second rotation position, the angle between the operating section 206 and the horizontal direction is β. The drug cylinder 20 rotates along the D3 direction from a first rotation position to a second rotation position. Selectively, α is 45°. Selectively, β is 90°. In this embodiment, first, the user inserts the drug cylinder 20 into the through hole 401 at the first rotation position by operating the operating part 206. Then, the drug cylinder 20 is pressed toward the second axial position, and when the first protrusion 402 comes into contact with the second protrusion 202, the drug cylinder 20 reaches the first axial position. At this time, because the first protrusion 402 and the second protrusion 202 are in contact, the sliding of the drug cylinder 20 toward the second axial position is restricted. By rotating the drug cylinder 20 using the operating unit 206 (for example, by rotating the drug cylinder 20 along the D3 direction), the drug cylinder 20 enters a second rotation position, the first protrusion 402 and the second protrusion 202 no longer come into contact with each other, and the drug cylinder 20 and the trigger device 30 become operablely connected. Subsequently, the user can operate the trigger device 30 to gradually slide the drug cylinder 20 toward a second axial position, gradually distributing the liquid medicine inside the drug cylinder 20 to the target position. When the drug cylinder 20 reaches the second axial position, the liquid medicine inside the drug cylinder 20 is completely distributed to the target position, and at this time, the drug cylinder 20 is in the second rotation position.The user rotates the drug cartridge 20 using the operating unit 206, returning the drug cartridge 20 to the first rotation position. This disengages the drug cartridge 20 from its operable connection with the trigger device 30, allowing it to be removed from the housing cavity 102 and replaced with a new drug cartridge 20.
[0032] Referring to Figures 8 and 9, in one embodiment, one end of the first protrusion 402 toward the mounting opening 101 (i.e., the right end of the first protrusion 402 in Figure 9) is defined as the outer end, and the other end of the first protrusion 402 toward the housing cavity 102 is defined as the inner end (i.e., the left end of the first protrusion 402 in Figure 9). A first stepped surface 4021 is provided at the outer end of the first protrusion 402, and a second stepped surface 2021 is provided at one end of the second protrusion 202 toward the second axial position, and the second stepped surface 2021 is configured to abut against the first stepped surface 4021. Specifically, when the drug cylinder 20 is inserted into the through hole 401 and slides to the second axial position, the first protrusion 402 and the second protrusion 202 come into contact with each other, the second stepped surface 2021 comes into contact with the first stepped surface 4021, and the drug cylinder 20 reaches the first axial position. Referring further to Figures 8 and 9, in this embodiment, the inner end of the first protrusion 402 is further provided with a first inclined surface 4022, and the end of the second protrusion 202 that is away from the second axial position is also provided with a second inclined surface 2022, and the second inclined surface 2022 cooperates with the first inclined surface 4022 to bias the first protrusion 402, thereby releasing the second protrusion 202 from the first protrusion 402. In this embodiment, the first protrusion 402 is further provided with a relief groove 4023. Specifically, as the drug cylinder 20 slides toward the first inclined surface 4022 and the second inclined surface 2022 in contact toward the second inclined surface 4022 toward the second inclined surface 4022 and the first inclined surface 4022 cooperate to bias the second protrusion 202 toward the relief groove 4023 toward the first protrusion 402, causing at least a portion of the first protrusion 402 to deform toward the relief groove 4023 (for example, to curve). This eliminates the restriction of the first protrusion 402 on the second protrusion 202, allowing the drug cylinder 20 to continue sliding toward the second inclined surface 402 until the first protrusion 402 releases the second protrusion 402 and the drug cylinder 20 is completely detached from the housing cavity 102.
[0033] Referring again to Figure 5, the fluid dispensing device 1 further includes a first reset member 50. The first reset member 50 is provided in the housing cavity 102 and abuts against one end of the drug cylinder 20. The first reset member 50 biases the drug cylinder 20 away from the housing cavity 102. In this embodiment, the first reset member 50 is a spring. As those skilled in the art will understand, the first reset member 50 may be other suitable elastic devices, such as a torsion spring or a sheet spring, and is not limited thereto.
[0034] Referring to Figures 1, 10, and 11, in one embodiment, the fluid dispensing device 1 further includes a carriage 60. The carriage 60 is provided within the housing cavity 102, with one end of the carriage 60 in contact with the drug cylinder 20 and the other end of the carriage 60 in contact with a first reset member 50 (e.g., a spring). The first reset member 50 biases the carriage 60 toward the drug cylinder 20. Specifically, when the drug cylinder 20 is in a second axial position and a second rotational position, after the user rotates the drug cylinder 20 to the first rotational position, the first reset member 50 pushes the drug cylinder 20 toward the housing cavity 102 via the carriage 60, eliminating the need for the user to manually slide the drug cylinder 20 toward the housing cavity 102.
[0035] Referring to Figures 10 and 11, in one embodiment, the carriage 60 is provided with a third projection 601. The housing 10 is provided with a through groove 103 that extends in the axial direction. The third projection 601 penetrates the through groove 103 and slides along the through groove 103. The third projection 601 slides along the through groove 103 and guides the sliding of the carriage 60 within the housing cavity 102. Furthermore, because the third projection 601 penetrates the through groove 103, the user can observe the axial position of the third projection 601 to grasp the current axial position of the carriage 60 and determine the axial position of the drug cylinder 20. Selectively, to facilitate the user's observation of the axial position of the third projection 601, a colored indicator is provided on the portion of the third projection 601 that is exposed outside the through groove 103.
[0036] Referring to Figures 6 and 7, in one embodiment, the inner wall of the through-hole 401 of the end cap 40 is provided with at least one first position limiting portion 4011. The outer wall of the drug cylinder 20 is provided with at least one second position limiting portion 204. When the first position limiting portion 4011 and the second position limiting portion 204 are aligned in the axial direction, the drug cylinder 20 can be inserted into the through-hole 401 at a first rotational position. In this embodiment, the first position limiting portion 4011 is a recess, and the second position limiting portion 204 is a protrusion, and when the protrusion and the recess are aligned in the axial direction, the protrusion can enter into the recess and engage with the recess. The engagement between the protrusion and the recess restricts the rotation of the drug cylinder 20 around the axial direction. The inner wall of the through-hole 401 is further provided with a accommodating portion 4012 for accommodating the protrusion. Specifically, the recess has an axially extending length. When the drug cylinder 20 is inserted into the through hole 401 at the first rotational position (i.e., the convex and concave portions are aligned in the axial direction, and the convex portion enters the concave portion), and slides toward the second axial position by a stroke exceeding the said extension length, the convex portion disengages from the concave portion, and at this time the convex portion enters the housing portion 4012, allowing rotation of the drug cylinder 20 around the axial direction. In this embodiment, the first position limiting portion 4011 is a concave portion and the second position limiting portion 204 is a convex portion, but this is merely illustrative. In other embodiments, the first position limiting portion 4011 may be a convex portion, and the second position limiting portion 204 may be a concave portion.
[0037] Figures 12 to 14 show selective embodiments of the first limiting portion 4011 and the second limiting portion 204. Comparing Figure 12 and Figure 13, the second position limiting portion 204 has a larger volume in the embodiment shown in Figure 13 compared to the embodiment shown in Figure 12. Comparing Figure 12 and Figure 14, the circumferential distance between the two second position limiting portions 204 is smaller in the embodiment shown in Figure 14 compared to the embodiment shown in Figure 12. By providing the first limiting portion 4011 and the second limiting portion 204, a "poka-yoke" (error-proofing) function is realized for the drug cylinder 20. Specifically, when the first position limiting portion 4011 and the second position limiting portion 204 are aligned in the axial direction, the drug cylinder 20 is positioned in a first rotational position. The drug cylinder 20 can only be inserted into the through hole 401 when the first position limiting portion 4011 and the second position limiting portion 204 are aligned in the axial direction. This ensures that the drug cylinder 20 can only be inserted into the through hole 401 in the first rotational position. As those skilled in the art will understand, the shape, position, and number of the first position limiting section 4011 and the second position limiting section 204 shown in Figures 12 to 14 are merely illustrative, and any appropriate shape, position, and number can be selected for the first position limiting section 4011 and the second position limiting section 204 according to actual needs. For example, in one embodiment, only one first position limiting section 4011 and one second position limiting section 204 are provided. For example, in one embodiment, three first position limiting sections 4011 and three second position limiting sections 204 are provided. For example, in one embodiment, the first position limiting section 4011 and the second position limiting section 204 are configured as semicircles, triangles, or rectangles.
[0038] Referring to Figures 15 to 17, in one embodiment, the drug cylinder 20 further includes a rack 205. The rack 205 is provided on the outer wall of the drug cylinder 20 and extends axially. A gear set 70 is provided in the housing cavity 102, and the drug cylinder 20 is operably connected to the trigger device 30 through the cooperation of the rack 205 and the gear set 70. Specifically, the trigger device 30 includes a trigger pivotably mounted in the housing 10. The gear set 70 includes a first gear 701, a second gear 702, and a third gear 703. The first gear 701 is fixedly connected to the pivot axis of the trigger and is pivotally movable with the trigger. The second gear 702 is pivotally mounted in the housing cavity 102 and meshes with the first gear 701. The third gear 703 is pivotably mounted within the housing cavity 102 and meshes with the second gear 702 and also with the rack 205. When the user presses the trigger, the trigger is forcibly pivoted, and the first gear 701 pivots with the trigger. The transmission of the second gear 702, the third gear 703 and the rack 205 converts the pivoting motion of the trigger in the D1 direction into axial sliding of the drug cylinder 20 in the D2 direction (i.e., the second axial position). This enables the drug cylinder 20 to slide to the second axial position when the trigger is pressed, and the drug solution inside the drug cylinder 20 to be gradually distributed to the target position.
[0039] Referring to Figure 16, in one embodiment, the fluid dispensing device 1 further includes a second reset member 90. The second reset member 90 is connected to the trigger device 30 and configured to bias the trigger device 30 to its initial position. Selectively, the second reset member 90 is a torsion spring, and after the user releases the pressing force on the trigger device 30, the torsion spring resets the trigger device 30 to its initial position. Selectively, the trigger device 30 is connected to a first gear 701 via a one-way connector, and the first gear 701 pivots with the trigger device 30 only when the trigger device 30 pivots in the direction of D1, and the first gear 701 does not pivot with the trigger device 30 when the trigger device 30 pivots in the direction opposite to D1 (for example, when the torsion spring resets the trigger device 30 to its initial position). The one-way connection device in question is known to those skilled in the art, and is, for example, a ratchet mechanism, for which this application omits a detailed explanation.
[0040] Embodiments of the present invention further provide a method for using the fluid dispensing device 1 in the above-described embodiment. This method is Step 101 involves inserting the drug cylinder 20 into the through hole 401 of the end cap 40 at a first rotational position and aligning the first groove 201 with the first through hole 401, Step 102 involves pushing the drug cylinder 20 in the direction of entering the through hole 401 until the first protrusion contacts the second protrusion and the drug cylinder 20 reaches the first axial position, Step 103 involves rotating the drug cylinder 20 so that it enters a second rotation position, and connecting the drug cylinder 20 to the trigger device 30 in an operable manner. Step 104 involves operating the trigger device 30 to drive the drug cylinder 20 to slide toward a second axial position, Step 105 involves rotating the drug cylinder 20 so that it enters the first rotation position when the drug cylinder 20 reaches the second axial position, thereby disengaging the drug cylinder 20 from the trigger device 30. Step 106 involves the first reset member 50 pushing the drug cylinder 20 and sliding it to a first axial position in a direction that moves it away from the housing cavity 102, and the first protrusion 402 coming into contact with the second protrusion 202, Step 107 includes biasing the first inclined surface 4022 with the second inclined surface 2022, thereby releasing the first protrusion 402 from the second protrusion 202, and causing the drug cylinder 20 to continue sliding in a direction away from the housing cavity 102 until it is completely detached from the housing cavity 102.
[0041] In one embodiment, step 100 is further included before step 101 in which the first position limiting portion 4011 and the second position limiting portion 204 are aligned in the axial direction.
[0042] Each of the technical features of the above embodiments can be combined in any way, and for the sake of brevity, not all possible combinations of each of the technical features in the above embodiments have been described. However, as long as these combinations of technical features are inconsistent, they should be considered to fall within the scope described herein.
[0043] The above embodiments represent only a few embodiments of the present invention, and while the description is more specific and detailed, it should not be understood as limiting the scope of the claims. A person skilled in the art could make some modifications and improvements without departing from the spirit of the present invention, and all of these would fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention is subject to the attached claims.
Claims
1. A fluid dispensing device (1), A housing (10) is provided with a mounting opening (101) and an internal housing cavity (102), and the mounting opening (101) and the housing cavity (102) are in communication with each other. A drug cylinder (20) is inserted into the mounting opening (101), is removably mounted within the housing cavity (102), and is configured to slide between a first axial position and a second axial position along the axial direction within the housing cavity (102), The trigger device (30) is provided on the housing (10) and is operably connected to the drug cylinder (20), The trigger device (30) can drive the drug cylinder (20) to slide from a first axial position to a second axial position. A fluid dispensing device (1) characterized in that, as the drug cylinder (20) slides from the first axial position to the second axial position, the drug cylinder (20) gradually enters the containment cavity (102).
2. The system further includes an end cap (40) connected to the mounting opening (101), The end cap (40) is A through hole (401) into which the drug cylinder (20) is inserted and removably mounted within the housing cavity (102), and the drug cylinder (20) is rotatable between a first rotation position and a second rotation position. The first protrusion (402) protrudes from the inner wall of the through hole (401), The aforementioned drug container (20) is A first groove (201) is provided on the outer wall of the drug cylinder (20), extends along the axial direction, and has a second protrusion (202), The drug cylinder (20) includes a second groove (203) provided on its outer wall and extending parallel to the first groove (201), The first protrusion (402) is slidable along the first groove (201) or the second groove (203), When the drug cylinder (20) is in the first rotation position, the first protrusion (402) is located in the first groove (201), The fluid dispensing device (1) according to claim 1, characterized in that when the drug cylinder (20) is in the second rotation position, the first protrusion (402) is located in the second groove (203).
3. When the drug cylinder (20) is inserted into the through hole (401) at a first rotational position, and slides toward the direction of entering the housing cavity (102) until the first protrusion (402) and the second protrusion (202) come into contact, the drug cylinder (20) reaches the first axial position. The fluid administration device (1) according to claim 2, characterized in that when the drug cylinder (20) is in the first axial position and the first rotational position, the drug cylinder (20) is rotated so that the drug cylinder (20) enters the second rotational position and the drug cylinder (20) is operably connected to the trigger device (30).
4. The fluid administration device (1) according to claim 3, characterized in that when the drug cylinder (20) is in the second axial position and the second rotational position, the drug cylinder (20) is rotated to enter the first rotational position, and the drug cylinder (20) is disengaged from the operable connection with the trigger device (30).
5. The fluid dispensing device (1) according to any one of claims 1 to 4, characterized in that a first stepped surface (4021) is provided at the outer end of the first protrusion (402), a second stepped surface (2021) is provided at one end of the second protrusion (202) toward the second axial position, and the second stepped surface (2021) is configured to abut against the first stepped surface (4021).
6. A first inclined surface (4022) is provided at the inner end of the first protrusion (402), A second inclined surface (2022) is provided at one end of the second protrusion (202) that is separated from the second axial position. The fluid dispensing device (1) according to any one of claims 1 to 4, characterized in that the second inclined surface (2022) is configured to cooperate with the first inclined surface (4022) to bias the first protrusion (402) and release the second protrusion (202).
7. The fluid dispensing device (1) according to claim 6, characterized in that the first protrusion (402) is provided with a relief groove (4023), and when the drug cylinder (20) slides away from the housing cavity (102) until the second protrusion (202) contacts the first protrusion (402), the second protrusion (202) biases the first protrusion (402) toward the relief groove (4023), causing the first protrusion (402) to retract from the second protrusion (202) and the first protrusion (402) to release the second protrusion (402).
8. The fluid dispensing device (1) further includes a first reset member (50), the first reset member (50) being provided in the housing cavity (102) and in contact with one end of the drug cylinder (20), and the first reset member (50) biasing the drug cylinder (20) in a direction toward separation from the housing cavity (102), characterized in that the fluid dispensing device (1) according to claim 1.
9. The fluid dispensing device (1) further includes a carriage (60), the carriage (60) is provided in the housing cavity (102), one end of the carriage (60) abuts against the drug cylinder (20), the other end of the carriage (60) abuts against the first reset member (50), and the first reset member (50) biases the carriage (60) toward the drug cylinder (20), as described in claim 8.
10. The fluid dispensing device (1) according to claim 8, characterized in that the carriage (60) is provided with a third protrusion (601), the housing (10) is provided with a through groove (103), the through groove (103) extends in the axial direction, and the third protrusion (601) penetrates the through groove (103) and slides along the through groove (103).
11. The inner wall of the through hole (401) of the end cap (40) is provided with at least one first limiting portion (4011), The outer wall of the drug cylinder 20 is provided with at least one second limiting portion 204, The fluid administration device (1) according to claim 2, characterized in that when the first position limiting portion (4011) and the second position limiting portion (204) are aligned in the axial direction, the drug cylinder (20) can be inserted into the through hole (401) at the first rotational position.
12. The fluid dispensing device (1) according to claim 11, characterized in that a housing portion (4012) for housing the second position limiting portion (204) is further provided on the inner wall of the through hole (401).
13. The fluid dispensing device (1) according to claim 12, characterized in that the first position limiting portion (4011) is a recess, the second position limiting portion (204) is a convex portion, and when the convex portion and the recess are aligned in the axial direction, the convex portion can enter the recess.
14. The drug cylinder (20) further includes a rack (205), the rack (205) is positioned on the outer wall of the drug cylinder (20) and extends in the axial direction, The fluid dispensing device (1) according to claim 1, characterized in that a gear set (70) is provided in the housing cavity (102), and the drug cylinder (20) is operably connected to the trigger device (30) by the cooperation of the rack (205) and the gear set (70).
15. A method for using the fluid dispensing device (1) according to any one of claims 1 to 14, The steps include inserting the drug cylinder (20) into the through hole (401) of the end cap (40) at a first rotational position, and aligning the first groove (201) with the first through hole (401), The first protrusion (402) comes into contact with the second protrusion (202), and the drug cylinder (20) is pushed in the direction of entering the through hole (401) until the drug cylinder (20) reaches the first axial position, The steps include: rotating the drug cylinder (20) so that it enters a second rotation position, and connecting the drug cylinder (20) to the trigger device (30) in an operable manner; The steps include operating the trigger device (30) to drive the drug cylinder (20) and slide it toward the second axial position, When the drug cylinder (20) reaches the second axial position, the drug cylinder (20) is rotated so that it enters the first rotation position, and the drug cylinder (20) is disconnected from the trigger device (30). The first reset member (50) slides the drug cylinder (20) to the first axial position in a direction that moves it away from the containment cavity (102), and the first protrusion (402) comes into contact with the second protrusion (202), A method of use characterized by comprising the step of biasing the first inclined surface (4022) with the second inclined surface (2022) so that the first protrusion (402) releases the second protrusion (202), and the drug cylinder (20) continues to slide in a direction away from the housing cavity (102) until it is completely detached from the housing cavity (102).
16. Before step 101, The method of use according to claim 15, further comprising the step of aligning the first position regulating portion (4011) and the second position regulating portion (204) in the axial direction.