Fixed metering injector
By adding the coupling between the limit hook and the stop portion on the syringe core rod, the problem that existing syringes are difficult to achieve fixed dose feeding, and quantitative absorption of liquid food is achieved, which improves the convenience and accuracy of use.
Patent Information
- Application Number
- CN202421898995.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-07
AI Technical Summary
When existing syringes are fed severely or unable to eat, it is difficult to achieve fixed dose feeding, especially when caregivers are inconvenient to operate or cannot recognize the scale, which can easily lead to insufficient or excessive feeding.
Add a limit hook to the core rod of the syringe. The limit hook cooperates with the stop portion on the sleeve surface to limit the maximum pull-out amount to ensure that the fixed dose of liquid food is absorbed at each time.
The quantitative absorption of liquid food of the syringe is realized, reducing the difficulty of use, and ensuring the accuracy and safety of feeding.
Smart Images
Figure CN223233074U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a fixed metering syringe. Background Art
[0002] Severely ill patients or other patients who are unable to eat usually need to be fed through a gastric tube. Liquid food is fed through the tube to ensure that the patient takes in enough nutrition. In this case, a special syringe is needed. In order to feed a fixed dose, it is generally necessary to quantitatively draw or push the liquid food according to the scale line on the syringe. However, for some elderly caregivers who cannot read or see the scale line clearly, or the operator's posture is not convenient to see the scale line, conventional syringes are inconvenient to use, and it is easy to cause negligence and lead to insufficient or overfeeding. Therefore, there is room for improvement. Utility Model Content
[0003] Based on the above problems, the purpose of the present invention is to provide a fixed metering syringe, which is convenient and intuitive to determine the dosage and operate to draw a fixed amount of liquid food, thereby achieving fixed-dose feeding and reducing the difficulty of use.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A fixed metering syringe comprises a sleeve and a core rod, wherein the head end of the sleeve is provided with a joint, the tail end of the sleeve is provided with a convex edge, the head end of the core rod is provided with a rubber plug extending into the sleeve, the tail end of the core rod is provided with a push-pull handle, the core rod is provided with a support rod extending from the push-pull handle toward the rubber plug, the support rod extends to the outside of the sleeve, the surface of the sleeve is provided with a stop portion, and the support rod is provided with a limit hook that cooperates with the stop portion to stop.
[0006] As an optional solution, the support rod, the limiting hook and the core rod are integrally injection-molded, and a gap is left between the support rod and the core rod to avoid the convex edge.
[0007] As an optional solution, the stop portion is a convex edge.
[0008] As an optional solution, the stop portion is a limiting ring sleeved on the surface of the sleeve, and the limiting ring is threadedly connected to the sleeve, so that the distance between the limiting ring and the convex edge is adjustable.
[0009] As an optional solution, the surface of the sleeve is provided with a threaded section that is threadedly connected to the limiting ring, and the threaded section is provided with a smooth area, and the smooth area is marked with scales, and the values of the scales correspond to different doses.
[0010] As an optional solution, the stop portion is a plurality of adjustment rings sleeved on the surface of the sleeve, each adjustment ring is in abutment with the convex edge in turn, each adjustment ring can rotate relative to the sleeve, and each adjustment ring is provided with a notch for the passage of the limit hook. When the limit hook is axially misaligned with the notch of an adjacent adjustment ring, the limit hook is stopped by the adjustment ring; when the limit hook is axially aligned with the notch of an adjacent adjustment ring, the limit hook passes through the adjustment ring and is stopped by the next adjustment ring or the convex edge.
[0011] As an optional solution, a groove is provided on the surface of the sleeve, and all the adjustment rings are installed in the groove, and the groove limits the adjustment rings on the outermost sides.
[0012] The beneficial effects of the utility model are as follows: the fixed metering syringe adds a limit hook on the existing core rod to limit the maximum pull-out amount of the core rod. The existence of the limit hook enables the syringe to draw a fixed amount of liquid food at a time, thereby realizing fixed-dose feeding. The structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic structural diagram of a fixed metering syringe provided in Example 1 of the present utility model;
[0014] Figure 2 This is a schematic structural diagram of a fixed metering syringe provided in Example 2 of the present utility model;
[0015] Figure 3 This is a schematic structural diagram of a fixed metering syringe provided in Example 3 of the present utility model.
[0016] In the attached figure:
[0017] 1. Sleeve; 2. Core rod; 3. Joint; 4. Raised edge; 5. Rubber plug; 6. Push-pull handle; 7. Support rod; 8. Limit hook; 9. Gap; 10. Limit ring; 11. Threaded section; 12. Scale; 13. Adjustment ring; 14. Notch; 15. Groove. DETAILED DESCRIPTION
[0018] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.
[0019] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0020] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.
[0022] Example 1:
[0023] See also Figure 1 As shown, this embodiment provides a fixed metering syringe, including a sleeve 1 and a core rod 2, the head end of the sleeve 1 is provided with a joint 3, the tail end of the sleeve 1 is provided with a convex edge 4, the head end of the core rod 2 is provided with a plug 5 extending into the sleeve 1, and the tail end of the core rod 2 is provided with a push-pull handle 6. In particular, the core rod 2 is provided with a support rod 7 extending from the push-pull handle 6 to the plug 5, and the support rod 7 extends to the outside of the sleeve 1. A stop portion is provided on the surface of the sleeve 1, and a limit hook 8 is provided on the support rod 7 for cooperating with the stop portion to stop.
[0024] Specifically, the support rod 7 , the limiting hook 8 and the core rod 2 are integrally injection-molded, and a gap 9 is left between the support rod 7 and the core rod 2 to avoid the convex edge 4 .
[0025] Preferably, the stopping portion here is the convex edge 4 , and the convex edge 4 stops the limiting hook 8 .
[0026] During use, the core rod 2 is pulled out until the limit hook 8 abuts against the convex edge 4, and a fixed amount of liquid food is sucked in, without the need to determine the dosage according to the traditional scale line.
[0027] Therefore, a limit hook 8 for limiting the maximum pull-out amount of the core rod 2 is added to the existing core rod structure. The existence of the limit hook 8 allows the syringe to draw a fixed amount of liquid food at a time, thereby achieving fixed-dose feeding, with a simple structure and easy use.
[0028] Example 2:
[0029] See also Figure 2 As shown, this embodiment provides a fixed metering syringe based on the embodiment 1, and further, the dosage of the fixed amount of liquid food can be fine-tuned.
[0030] The difference is that the stop portion here is a limit ring 10 sleeved on the surface of the sleeve 1. The limit ring 10 is threadedly connected to the sleeve 1 so that the distance between the limit ring 10 and the flange 4 is adjustable. The limit ring 10 is used to replace the flange 4 to stop the limit hook 8.
[0031] Specifically, the surface of the sleeve 1 is provided with a threaded section 11 that is threadably connected to the retaining ring 10. The threaded section 11 is provided with a smooth surface area, on which a scale 12 is marked. The values of the scale 12 correspond to different dosages. It should be noted that the retaining ring 10 is adjusted to the target scale 12 position before the liquid food is drawn. After the adjustment, the position of the retaining ring 10 is stable and does not affect the subsequent feeding operation.
[0032] When in use, first rotate the limit ring 10 to the target scale 12 to determine the dosage, and then operate the core rod 2 to pull out until the limit hook 8 abuts against the limit ring 10, and a fixed amount of liquid food is sucked in. It is suitable for use in occasions with different dosage requirements.
[0033] Example 3:
[0034] See also Figure 3 As shown, this embodiment further provides a fixed metering syringe based on the embodiment 1, and further, the dosage of the fixed amount of liquid food can also be adjusted.
[0035] The difference is that the stop portion here is a plurality of adjustment rings 13 sleeved on the surface of the sleeve 1, each adjustment ring 13 is adjacent to the convex edge 4 in turn, each adjustment ring 13 can rotate relative to the sleeve 1, and each adjustment ring 13 is provided with a notch 14 for the limit hook 8 to pass through.
[0036] When the limiting hook 8 is axially misaligned with the notch 14 of an adjacent adjusting ring 13, the limiting hook 8 is stopped by the adjusting ring 13; when the limiting hook 8 is axially aligned with the notch 14 of an adjacent adjusting ring 13, the limiting hook 8 passes through the adjusting ring 13 and is stopped by the next adjusting ring 13 or the protruding edge 4.
[0037] Specifically, a groove 15 is formed on the surface of the sleeve 1 , and all the adjustment rings 13 are installed in the groove 15 . The groove 15 limits the adjustment rings 13 on the outermost sides, so that each adjustment ring 13 can only rotate.
[0038] When the limit hook 8 is stopped by different adjustment rings 13 or ridges 4, different liquid food dosages are corresponding. During use, the limit hook 8 is first determined according to the dosage requirement, and the corresponding number of adjustment rings 13 are rotated to align the notch 14 with the limit hook 8 axially. The core rod 2 is then operated and pulled out until the limit hook 8 abuts against a certain limit ring 10 or ridge 4. This has a fixed amount of liquid food. This is suitable for use in different dosage requirements.
[0039] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A fixed metering syringe, comprising a sleeve (1) and a core rod (2), wherein the head end of the sleeve (1) is provided with a joint (3), the tail end of the sleeve (1) is provided with a convex edge (4), the head end of the core rod (2) is provided with a rubber plug (5) extending into the sleeve (1), and the tail end of the core rod (2) is provided with a push-pull handle (6), characterized in that: The core rod (2) is provided with a support rod (7) extending from the push-pull handle (6) toward the rubber plug (5), the support rod (7) extends to the outside of the sleeve (1), the surface of the sleeve (1) is provided with a stop portion, and the support rod (7) is provided with a limit hook (8) that cooperates with the stop portion to stop.
2. The fixed metered syringe according to claim 1, characterized in that The support rod (7), the limiting hook (8) and the core rod (2) are integrally injection-molded, and a gap (9) is left between the support rod (7) and the core rod (2) to avoid the convex edge (4).
3. The fixed metered syringe according to claim 1, characterized in that The stop portion is the convex edge (4).
4. The fixed metered syringe according to claim 1, characterized in that The stop portion is a limiting ring (10) sleeved on the surface of the sleeve (1), and the limiting ring (10) is threadedly connected to the sleeve (1), so that the distance between the limiting ring (10) and the convex edge (4) is adjustable.
5. The fixed metered syringe according to claim 4, characterized in that: The surface of the sleeve (1) is provided with a threaded section (11) threadedly connected to the limiting ring (10), and the threaded section (11) is provided with a smooth surface area, and the smooth surface area is marked with a scale (12), and the values of the scale (12) correspond to different dosages.
6. The fixed metered syringe according to claim 1, characterized in that: The stop portion is a plurality of adjustment rings (13) sleeved on the surface of the sleeve (1), each of the adjustment rings (13) is adjacent to the convex edge (4) in sequence, each of the adjustment rings (13) can rotate relative to the sleeve (1), and each of the adjustment rings (13) is provided with a notch (14) for the limit hook (8) to pass through. When the limiting hook (8) is axially misaligned with the notch (14) of an adjacent adjusting ring (13), the limiting hook (8) is stopped by the adjusting ring (13); When the limiting hook (8) is axially aligned with the notch (14) of an adjacent adjusting ring (13), the limiting hook (8) passes through the adjusting ring (13) and is stopped by the next adjusting ring (13) or the convex edge (4).
7. The fixed metered syringe according to claim 6, characterized in that: A groove (15) is provided on the surface of the sleeve (1), and all the adjustment rings (13) are installed in the groove (15). The groove (15) limits the adjustment rings (13) on the outermost sides.