A detachable liquid injection head structure of a contact lens liquid injection machine

Abstract

This utility model discloses a detachable injection head structure for a contact lens injection machine, relating to the technical field of contact lens production equipment. It includes an upper mounting plate, a lower mounting plate, an anti-foaming injection mechanism, and a locking and anti-shaking mechanism. The lower mounting plate is fixedly connected to the lower mounting plate via multiple evenly distributed, circumferentially arranged support rods on the lower surface of the upper mounting plate. This utility model, by incorporating a pulsating damping cavity, an expanded buffer cavity with spiral guide ribs, and a fluoropolymer inner coating, helps stabilize the liquid flow, separate air bubbles, and reduce liquid adhesion, thereby improving the accuracy and cleanliness of the injection. Furthermore, the locking groove is tightened by fixing bolts to provide a circumferential fixation of the injection head, which facilitates calibration of its installation center and resists vibration. Simultaneously, the injection needle tip can be quickly replaced using a Luer connector, and the upper and lower mounting plates can be separated by unscrewing the threaded support rods, providing convenience for equipment cleaning and maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of contact lens manufacturing equipment, specifically a detachable injection head structure for a contact lens injection machine. Background Technology

[0002] Contact lenses, as a widely used vision correction medical product, have a highly automated production process with extremely stringent technical requirements. One of the key steps on the production line is injecting a measured amount of care solution or preservation solution into the contact lens packaging. The quality of this step affects the product's sterility and safety, user experience, and product yield.

[0003] However, there are some problems with the design of the infusion head structure of contact lens injection machines:

[0004] The injection process is prone to generating air bubbles, which affects product quality: Traditional injection heads are usually simple straight pipe structures. The liquid flows at high speed through the narrow pipe driven by the pump, and air is easily drawn in due to turbulence and pressure fluctuations. When injected into the packaging, visible air bubbles are formed. The presence of air bubbles not only affects the appearance of the product, but may also pose potential risks to product quality and sealing in subsequent sealing, sterilization and other processes.

[0005] Inconvenient disassembly and maintenance, low production efficiency: As a component that directly contacts the liquid, the injection needle tip requires frequent cleaning, disinfection, or replacement to meet the requirements of aseptic production or to adapt to the switching between different product specifications. Existing injection heads are mostly one-piece designs or use complex bolt fixation, making it time-consuming and labor-intensive to disassemble the entire injection head.

[0006] To address this, we propose a detachable injection head structure for a contact lens injection machine. Utility Model Content

[0007] 1. The problem to be solved

[0008] In view of the problems existing in the prior art, the purpose of this utility model is to provide a detachable injection head structure for a contact lens injection machine to solve the problems mentioned in the background art.

[0009] 2. Technical Solution

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A detachable injection head structure for a contact lens injection machine includes an upper mounting plate, a lower mounting plate, an anti-foaming injection mechanism, and a locking and anti-swaying mechanism. The lower mounting plate is fixedly connected to the lower mounting plate via multiple evenly distributed, circumferentially arranged support rods on the lower surface of the upper mounting plate. Both the upper and lower mounting plates have four evenly distributed mounting holes. The anti-foaming injection mechanism is installed within each mounting hole. The anti-foaming injection mechanism includes an injection head, an expansion buffer chamber, an injection needle tip, a sub-injection tube, and a main injection tube. The injection head is inserted into the mounting hole. The bottom end of the injection head is fixedly connected to the injection needle tip via a Luer connector. An expansion buffer chamber is integrally formed in the middle section of the liquid flow path of the injection head. The main injection tube is fixedly connected to the upper surface of the upper mounting plate. The top end of the injection head is fixedly connected to a sub-injection tube, which is connected to the main injection tube. A locking and anti-swaying mechanism is provided on the outside of each mounting hole.

[0012] As a further embodiment of this utility model: the inner wall of the expanded buffer cavity is fixedly connected with a spiral guide rib.

[0013] As a further embodiment of this utility model: both ends of the support rod are provided with external threads, and are respectively threaded to the corresponding internal threaded holes opened on the upper mounting plate and the lower mounting plate.

[0014] As a further embodiment of this utility model: the locking anti-sway mechanism includes a fixing bolt, and four evenly distributed and circumferentially distributed locking grooves are provided on the outer surfaces of the upper mounting plate and the lower mounting plate, and the locking grooves are interconnected with the corresponding mounting holes. Threaded grooves and through holes are respectively provided on both sides of the locking grooves. Four evenly distributed fastening grooves are provided on the outer surfaces of the upper mounting plate and the lower mounting plate, and fixing bolts are provided in the fastening grooves. The fixing bolts pass through the through holes and are threadedly connected to the threaded grooves on the locking grooves.

[0015] As a further embodiment of this utility model, the outer surface of the injection head is provided with anti-slip texture.

[0016] As a further embodiment of this utility model: the middle part of the liquid flow path of the injection head and the upper end of the expansion buffer cavity are further provided with a pulsation damping cavity sealed by a flexible diaphragm.

[0017] As a further embodiment of this utility model: the inner wall of the expansion buffer cavity, the spiral guide ribs, and the inner flow channel surface of the injection needle tip are all coated with a fluoropolymer coating.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model, by setting up a pulsating damping cavity, an expanded buffer cavity with spiral guide ribs, and a fluoropolymer inner coating, helps to stabilize the liquid flow, separate air bubbles, and reduce liquid adhesion, thereby improving the accuracy and cleanliness of the injection.

[0020] 2. This utility model is equipped with a locking and anti-sway mechanism. The locking groove is tightened by fixing bolts to fix the injection head in a ring-like manner, which is conducive to calibrating its installation center and resisting vibration. At the same time, the injection needle tip can be quickly replaced by using Luer connector. The upper and lower mounting plates can be separated by unscrewing the threaded support rod, which provides convenience for cleaning and maintenance of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a detachable infusion head structure for a contact lens infusion machine;

[0022] Figure 2 This is a schematic diagram of the injection head structure in a detachable injection head structure of a contact lens injection machine;

[0023] Figure 3 This is a schematic diagram of the expansion buffer chamber in the detachable injection head structure of a contact lens injection machine;

[0024] Figure 4 for Figure 1 A magnified structural diagram of region A in the middle.

[0025] In the diagram: 1. Upper mounting plate; 2. Mounting hole; 3. Support rod; 4. Lower mounting plate; 5. Locking groove; 6. Main injection pipe; 7. Sub-injection pipe; 8. Injection head; 9. Expanding buffer chamber; 10. Injection needle tip; 11. Luer connector; 13. Spiral guide rib; 14. Fixing bolt; 15. Fastening groove. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] Please see Figures 1-4 In this embodiment of the present invention, a detachable injection head structure for a contact lens injection machine includes an upper mounting plate 1, a lower mounting plate 4, an anti-foaming injection mechanism, and a locking and anti-shaking mechanism.

[0028] The lower surface of the upper mounting plate 1 is fixedly connected to the lower mounting plate 4 by a plurality of evenly distributed and circumferentially arranged support rods 3. Both ends of the support rods 3 are provided with external threads and are threadedly connected to the corresponding internal threaded holes on the upper mounting plate 1 and the lower mounting plate 4, respectively. The upper mounting plate 1 and the lower mounting plate 4 are each provided with four evenly distributed mounting holes 2. An antifoaming injection mechanism is provided in the mounting holes 2. The antifoaming injection mechanism includes an injection head 8, an expansion buffer chamber 9, an injection needle tip 10, a branch injection tube 7, and a main injection tube 6. The injection head 8 is inserted into the mounting holes 2, and the bottom end of the injection head 8 is connected to a Luer connector 11. The injection head 8 is fixedly connected to the injection needle tip 10, and an expansion buffer cavity 9 is integrally formed in the middle section of the liquid flow path. The inner wall of the expansion buffer cavity 9 is fixedly connected to a spiral guide rib 13. The upper surface of the upper mounting plate 1 is fixedly connected to the main injection pipe 6. The top end of the injection head 8 is fixedly connected to a branch injection pipe 7, which is connected to the main injection pipe 6. The middle part of the liquid flow path of the injection head 8 and the upper end of the expansion buffer cavity 9 are also provided with a pulsation damping cavity sealed by a flexible diaphragm. The inner wall of the expansion buffer cavity 9, the spiral guide rib 13, and the inner flow channel surface of the injection needle tip 10 are all covered with a fluoropolymer coating.

[0029] It should be noted that since both ends of the support rod 3 are provided with external threads, when the equipment needs to be deeply cleaned or maintained, the staff can easily unscrew the support rod 3 to separate the upper mounting plate 1 from the lower mounting plate 4. Compared with the traditional integrated or welded frame, this greatly simplifies the cleaning work of the internal space of the equipment, helps to maintain the cleanliness of the production environment, and reduces the time cost required for maintenance.

[0030] Furthermore, in terms of defoaming function, the liquid flowing from the injection pipe 7 into the injection head 8 will first pass through the pulsation damping chamber, thereby absorbing the flow pulsation generated by the upstream supply pump. Specifically, a groove or small chamber can be opened on the pipe wall of the injection head 8 and sealed by a flexible diaphragm (since the specific structure of the pulsation damping chamber is a conventional technology for those skilled in the art, and its structure is simple and easy to implement, it is not shown in detail in the attached drawings), making the liquid flow that finally enters the expansion buffer chamber 9 more stable.

[0031] Furthermore, the spiral guide ribs 13 set on the inner wall of the expansion buffer chamber 9 can guide the liquid to flow smoothly downward along the spiral path, which not only orderly prolongs the residence time of the liquid in the chamber, but also makes it more conducive to using centrifugal force to cause the tiny bubbles that may exist in the liquid flow to gather towards the center, float up and separate from the mainstream liquid, thus improving the reliability of the defoaming effect.

[0032] Furthermore, the injection needle tip 10 is connected to the main body of the injection head 8 via a Luer connector 11. As a mature aseptic connection standard, the Luer connector 11 allows operators to quickly disassemble and install the injection needle tip 10 without the aid of any tools. For actual production scenarios that require frequent cleaning, sterilization, or needle tip replacement according to different product specifications, this significantly shortens the equipment downtime and improves overall production efficiency. At the same time, the fluoropolymer coating on the expansion buffer chamber 9, the spiral guide rib 13, and the inner flow channel surface of the injection needle tip 10 reduces the adhesion of liquid to the inner wall, avoids wall residue and dripping, and prevents cross-contamination between different batches of products.

[0033] A locking anti-sway mechanism is provided on the outside of the mounting hole 2. The locking anti-sway mechanism includes a fixing bolt 14. Four evenly distributed and circumferentially distributed locking grooves 5 are opened on the outer side of the upper mounting plate 1 and the lower mounting plate 4. The locking grooves 5 are interconnected with the corresponding mounting holes 2. Threaded grooves and through holes are opened on both sides of the locking grooves 5. Four evenly distributed fastening grooves 15 are opened on the outer side of the upper mounting plate 1 and the lower mounting plate 4. Fixing bolts 14 are provided in the fastening grooves 15. The fixing bolts 14 pass through the through holes and are threadedly connected to the threaded grooves on the locking grooves 5. Anti-slip textures are opened on the outer side of the injection head 8, which increases the static friction coefficient between the injection head 8 and the inner wall of the mounting hole 2 and improves the stability of the device.

[0034] It should be noted that the locking anti-sway mechanism transforms the originally closed mounting hole 2 into a flexible "C"-shaped opening clamping ring. When the locking bolt 14 passes through the through hole and is screwed into the threaded hole on the opposite side, the thread tension will narrow the gap of the locking groove 5, allowing the inner wall of the mounting hole 2 to apply a uniform, encircling clamping force to the injection head 8 placed therein. Compared with the traditional single-point set screw fixing, the encircling clamping force ensures that the landing point of the injection needle tip 10 is more accurate, and the uniform force also avoids damage caused by local stress concentration on the injection head 8 body. Furthermore, the locking effect is more stable, reducing the loosening and shaking problems that may occur under long-term vibration of the equipment.

[0035] In summary, this utility model discloses a detachable injection head structure for a contact lens injection machine. By incorporating a pulsating damping chamber, an expanded buffer chamber 9 with spiral guide ribs 13, and a fluoropolymer inner coating, it helps stabilize the liquid flow, separate air bubbles, and reduce liquid adhesion, thereby improving the accuracy and cleanliness of the injection. Furthermore, its locking and anti-sway mechanism tightens the locking groove 5 with fixing bolts 14 to provide a circumferential fixation for the injection head 8, which is beneficial for calibrating its installation center and resisting vibration. At the same time, the injection needle tip 10 can be quickly replaced using the Luer connector 11, and the upper and lower mounting plates can be separated by unscrewing the threaded support rod 3, providing convenience for the cleaning and maintenance of the equipment.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detachable infusion head structure for a contact lens infusion machine, characterized in that, include: Upper mounting plate (1); The lower mounting plate (4) is fixedly connected to the lower surface of the upper mounting plate (1) by a plurality of evenly distributed and circumferentially distributed support rods (3), and both the upper mounting plate (1) and the lower mounting plate (4) are provided with four evenly distributed mounting holes (2). The defoaming injection mechanism is provided in the mounting hole (2). The defoaming injection mechanism includes an injection head (8), an expansion buffer chamber (9), an injection needle tip (10), a sub-injection tube (7), and a main injection tube (6). The injection head (8) is inserted in the mounting hole (2). The bottom end of the injection head (8) is fixedly connected to the injection needle tip (10) through a Luer connector (11). The expansion buffer chamber (9) is integrally formed in the middle section of the liquid flow path of the injection head (8). The main injection tube (6) is fixedly connected to the upper surface of the upper mounting plate (1). The top end of the injection head (8) is fixedly connected to the sub-injection tube (7). The sub-injection tube (7) is connected to the main injection tube (6). A locking anti-sway mechanism is provided on the outside of the mounting hole (2).

2. The detachable infusion head structure of a contact lens infusion machine according to claim 1, characterized in that, The inner wall of the expanded buffer cavity (9) is fixedly connected with a spiral guide rib (13).

3. The detachable infusion head structure of a contact lens infusion machine according to claim 1, characterized in that, Both ends of the support rod (3) are provided with external threads, and are threadedly connected to the corresponding internal threaded holes on the upper mounting plate (1) and the lower mounting plate (4), respectively.

4. The detachable infusion head structure of a contact lens infusion machine according to claim 1, characterized in that, The locking anti-sway mechanism includes a fixing bolt (14). The outer surfaces of the upper mounting plate (1) and the lower mounting plate (4) are provided with four evenly distributed locking grooves (5) in a circular pattern. The locking grooves (5) are connected to the corresponding mounting holes (2). The two sides of the locking grooves (5) are respectively provided with threaded grooves and through holes. The outer surfaces of the upper mounting plate (1) and the lower mounting plate (4) are provided with four evenly distributed fastening grooves (15). The fastening grooves (15) are provided with fixing bolts (14). The fixing bolts (14) pass through the through holes and are threadedly connected to the threaded grooves on the locking grooves (5).

5. The detachable infusion head structure of a contact lens infusion machine according to claim 1, characterized in that, The outer surface of the injection head (8) is provided with anti-slip texture.

6. The detachable infusion head structure of a contact lens infusion machine according to claim 1, characterized in that, The middle part of the liquid flow path of the injection head (8) and the upper end of the expansion buffer chamber (9) are also provided with a pulsating damping chamber sealed by a flexible diaphragm.

7. The detachable infusion head structure of a contact lens infusion machine according to claim 1, characterized in that, The inner wall of the expansion buffer cavity (9), the spiral guide rib (13), and the inner flow channel surface of the injection needle tip (10) are all covered with a fluoropolymer coating.

Images