Dripping-proof dispensing needle structure

Abstract

The utility model belongs to the technical field of glue dispensing equipment, specifically disclose a kind of glue dispensing needle head structure of anti-dripping, including needle head main part, anti-dripping subassembly and locking assembly, the anti-dripping subassembly is arranged in needle head main part inboard, and locking assembly is arranged in needle head main part side edge.Needle head main part includes feed pipe, glue dispensing head and connecting sleeve, glue dispensing head is fixed in the lower of feed pipe, and screw connecting sleeve is fixed in the upper of feed pipe, and the side edge of feed pipe is provided with positioning groove, and positioning hole is provided in positioning groove;Anti-dripping subassembly includes connecting pipe and the taper hose fixed below connecting pipe, and connecting pipe is located in feed pipe, and taper hose is located in glue dispensing head, and the side edge of connecting pipe is fixed with the positioning block matched with positioning groove, and locking hole is provided on positioning block, and positioning hole is aligned with locking hole and is fixed by locking assembly;The design of locking assembly makes the dismounting operation of anti-dripping subassembly simple, and it is convenient to replace or maintain anti-dripping subassembly in later period, and it reduces operation difficulty and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of dispensing equipment technology, specifically to a drip-proof dispensing needle structure. Background Technology

[0002] Dispensing needles are detachable precision accessories mounted on the top of dispensing syringes, primarily used in fluid dispensing processes in the SMT, LED, semiconductor manufacturing, and pharmaceutical industries. They are available in sizes ranging from 14g to 35g, adaptable to colloids of varying viscosities and flow rates, and can be connected to syringes via threads, snap-fits, or other methods.

[0003] During use, the adhesive inside the existing dispensing needle is prone to dripping due to gravity. Therefore, some people will set an anti-drip device inside the dispensing needle, which is achieved by using a tapered anti-drip hose and an anti-drip ring. For example, Chinese utility model patent with announcement number CN211160474U discloses an anti-drip dispensing needle.

[0004] However, in actual use, it is found that the anti-drip dispensing needle has a screw-in connection inside the needle, which is very troublesome. If the anti-drip device needs to be removed later, it is difficult to rotate the anti-drip device, making it inconvenient for disassembly and maintenance. Utility Model Content

[0005] The purpose of this invention is to provide a drip-proof dispensing needle structure, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drip-proof dispensing needle structure, comprising a needle body, a drip-proof component, and a locking component, wherein the drip-proof component is disposed on the inner side of the needle body, and the locking component is disposed on the side of the needle body.

[0007] The needle body includes a feeding tube, a dispensing head, and a connecting sleeve. The dispensing head is fixed below the feeding tube, and the connecting sleeve is fixed above the feeding tube. A positioning groove is provided on the side of the feeding tube, and a positioning hole is provided in the positioning groove. The dispensing head is used for dispensing adhesive, and the connecting sleeve is used to install the needle body; the positioning groove serves to position the anti-drip component.

[0008] The anti-drip assembly includes a connecting tube and a tapered flexible tube fixed below the connecting tube. The connecting tube is located inside the feed tube, and the tapered flexible tube is located inside the dispensing head. A positioning block that mates with a positioning groove is fixed to the side of the connecting tube. The positioning block has a locking hole, which is aligned with the positioning hole and secured by a locking assembly. The tapered flexible tube provides an anti-drip effect, the positioning block inserted into the positioning groove positions the anti-drip assembly, and the locking assembly securely locks the anti-drip assembly inside the needle body.

[0009] As a preferred embodiment of this invention, the inner wall of the connecting sleeve is provided with threads, and the connecting sleeve is fixed to the dispensing equipment by bolts.

[0010] As a preferred embodiment of this invention, a sealing gasket is fixed above the connecting pipe. The sealing gasket is used to improve the sealing effect by squeezing the dispensing port of the dispensing equipment after installation.

[0011] As a preferred embodiment of this invention, a leak-proof ring is fixed to the outlet at the bottom of the tapered hose. Both the leak-proof ring and the tapered hose are made of elastic material, and the leak-proof ring is filled with gas. In its natural state, the leak-proof ring seals the opening at the bottom of the tapered hose. Only when the adhesive inside the delivery tube is subjected to significant pressure will the opening at the bottom of the tapered hose open, and the pressure will cause the leak-proof ring to contract and open, thereby allowing the adhesive to be delivered. When not subjected to pressure, the tapered hose and the leak-proof ring are in a contracted state.

[0012] In a preferred embodiment of this invention, the locking assembly includes a U-shaped frame, a movable plate, a pull rod, a spring, a connecting plate, and a locking rod. The U-shaped frame is fixed to the outside of the positioning groove. The movable plate is located between the U-shaped frame and the positioning groove. The pull rod passes through the U-shaped frame and is fixed to the movable plate. The spring is parallel to the pull rod and fixed between the movable plate and the U-shaped frame. The connecting plate is fixed to the end of the pull rod away from the movable plate. The locking rod is fixed to the movable plate. The locking rod passes through the positioning hole and is inserted into the locking hole to fix the anti-drip assembly. By using the locking rod to fix the anti-drip assembly, when removal is required, simply pull the movable plate with the pull rod, causing the movable plate to pull the locking rod out of the locking hole, thus removing the anti-drip assembly from the needle body. The operation is simple and easy to understand, making subsequent disassembly and assembly very convenient.

[0013] As a preferred embodiment of this utility model, a pull ring is fixed on the connecting plate. The pull ring is mainly for the convenience of pulling the connecting plate, thereby using the connecting plate to pull the movable plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a conical hose and an internally inflatable leak-proof ring to effectively seal the outlet in its natural state, opening only when the adhesive has sufficient pressure. This prevents adhesive dripping after dispensing stops, ensuring dispensing accuracy and a clean working environment. The locking component design simplifies the installation and removal of the leak-proof component, requiring only the pulling ring. This facilitates future replacement or maintenance, reducing operational difficulty and maintenance costs. The tight fit of all components, with the positioning groove and block ensuring accurate installation, and the locking component guaranteeing stable fixation, results in a structure that balances functionality and practicality. Attached Figure Description

[0015] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of the needle of this utility model; Figure 3 This is a schematic diagram of the anti-drip component structure of this utility model; Figure 4 This is a schematic diagram of the locking component structure of this utility model.

[0016] In the diagram: 1. Needle body; 101. Feed tube; 102. Dispensing head; 103. Connecting sleeve; 2. Anti-drip assembly; 201. Connecting tube; 2011. Sealing gasket; 202. Conical hose; 2021. Anti-leak ring; 3. Locking assembly; 301. U-shaped frame; 302. Movable plate; 303. Pull rod; 304. Spring; 305. Connecting plate; 3051. Pull ring; 306. Locking rod; 4. Positioning groove; 401. Positioning hole; 5. Positioning block; 501. Locking hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Please see Figure 1-4This utility model provides a technical solution: a drip-proof dispensing needle structure, including a needle body 1, a drip-proof component 2 and a locking component 3, wherein the drip-proof component 2 is disposed on the inner side of the needle body 1 and the locking component 3 is disposed on the side of the needle body 1.

[0021] The needle body 1 includes a feeding tube 101, a dispensing head 102, and a connecting sleeve 103. The dispensing head 102 is fixed below the feeding tube 101, and the connecting sleeve 103 is fixed above the feeding tube 101. A positioning groove 4 is provided on the side of the feeding tube 101, and a positioning hole 401 is provided in the positioning groove 4. The dispensing head 102 is used for dispensing adhesive, and the connecting sleeve 103 is used to install the needle body 1; the positioning groove 4 serves to position the anti-drip component 2.

[0022] The anti-drip assembly 2 includes a connecting tube 201 and a tapered flexible tube 202 fixed below the connecting tube 201. The connecting tube 201 is located inside the feed tube 101, and the tapered flexible tube 202 is located inside the dispensing head 102. A positioning block 5 that mates with the positioning groove 4 is fixed to the side of the connecting tube 201. The positioning block 5 has a locking hole 501. The positioning hole 401 and the locking hole 501 are aligned and fixed by the locking assembly 3. The tapered flexible tube 202 provides an anti-drip effect, the positioning block 5 is inserted into the positioning groove 4 to position the anti-drip assembly 2, and the locking assembly 3 fixes and locks the anti-drip assembly 2 inside the needle body 1.

[0023] Furthermore, the inner wall of the connecting sleeve 103 is provided with threads, and the connecting sleeve 103 is fixed to the dispensing equipment by bolts.

[0024] Furthermore, a sealing gasket 2011 is fixed above the connecting pipe 201. The sealing gasket 2011 is used to squeeze the dispensing port of the dispensing equipment after installation to improve the sealing effect.

[0025] Furthermore, a leak-proof ring 2021 is fixed to the outlet below the tapered hose 202. Both the leak-proof ring 2021 and the tapered hose 202 are made of elastic material, and the leak-proof ring 2021 is filled with gas. In its natural state, the leak-proof ring 2021 seals the opening at the bottom of the tapered hose 202. Only when the adhesive inside the delivery tube is subjected to a large compressive force will the opening at the bottom of the tapered hose 202 be opened, and the compressive force will cause the leak-proof ring 2021 to contract and open, thereby allowing the adhesive to be delivered. When not subjected to compressive force, the tapered hose 202 and the leak-proof ring 2021 are in a contracted state.

[0026] Furthermore, the locking assembly 3 includes a U-shaped frame 301, a movable plate 302, a pull rod 303, a spring 304, a connecting plate 305, and a locking rod 306. The U-shaped frame 301 is fixed to the outside of the positioning groove 4. The movable plate 302 is located between the U-shaped frame 301 and the positioning groove 4. The pull rod 303 passes through the U-shaped frame 301 and is fixed to the movable plate 302. The spring 304 is parallel to the pull rod 303 and fixed between the movable plate 302 and the U-shaped frame 301. The connecting plate 305 is fixed to the end of the pull rod 303 away from the movable plate 302. The locking rod 306 is fixed to the movable plate 302. The locking rod 306 passes through the positioning hole 401 and is inserted into the locking hole 501 to fix the anti-drip assembly 2. By fixing the anti-drip component 2 with the locking rod 306, when it needs to be removed, simply pull the movable plate 302 with the pull rod 303 so that the movable plate 302 drives the locking rod 306 out of the locking hole 501, and the anti-drip component 2 can be taken out from the needle body 1. The operation is simple and easy to understand, and it is very convenient for later disassembly and assembly.

[0027] Furthermore, a pull ring 3051 is fixed on the connecting plate 305. The pull ring 3051 is mainly for conveniently pulling the connecting plate 305, thereby using the connecting plate 305 to pull the movable plate 302.

[0028] In summary, during operation, the anti-drip dispensing needle structure first installs and fixes the needle body 1 onto the dispensing equipment via the threads on the inner wall of the connecting sleeve 103. After installation, the sealing gasket 2011 above the connecting tube 201 makes tight contact with the dispensing port of the dispensing equipment, ensuring a tight seal. The anti-drip component 2 is positioned by inserting the positioning block 5 into the positioning groove 4, and then the locking rod 306 of the locking component 3 passes through the positioning hole 401 and the locking hole 501 to fix it inside the needle body 1. During the dispensing process, when the dispensing equipment delivers the adhesive, the adhesive enters the feed pipe 101 and exerts significant pressure on the tapered hose 202. Since the tapered hose 202 and the leak-proof ring 2021 are made of elastic material, and the leak-proof ring 2021 is inflated, the pressure causes the bottom opening of the tapered hose 202 to open, while the leak-proof ring 2021 contracts, allowing the adhesive to pass through and complete the dispensing. When the adhesive delivery stops and the pressure is no longer applied, the tapered hose 202 and the leak-proof ring 2021 contract due to their elasticity, and the leak-proof ring 2021 seals the bottom opening of the tapered hose 202, preventing leakage. If it is necessary to disassemble or assemble the anti-drip component 2, pull the pull ring 3051 to move the connecting plate 305, pull rod 303 and movable plate 302. The spring 304 is compressed, and the locking rod 306 is removed from the locking hole 501, so the anti-drip component 2 can be taken out. During installation, the positioning block 5 is inserted into the positioning groove 4, the pull ring 3051 is released, the spring 304 returns to its original position and pushes the movable plate 302 to insert the locking rod 306 into the locking hole 501, thus completing the fixing.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drip-proof dispensing needle structure, characterized in that: It includes a needle body (1), an anti-drip assembly (2) and a locking assembly (3), wherein the anti-drip assembly (2) is disposed inside the needle body (1) and the locking assembly (3) is disposed on the side of the needle body (1); The needle body (1) includes a feeding tube (101), a dispensing head (102) and a connecting sleeve (103). The dispensing head (102) is fixed below the feeding tube (101), and the connecting sleeve (103) is fixed above the feeding tube (101). A positioning groove (4) is provided on the side of the feeding tube (101), and a positioning hole (401) is provided in the positioning groove (4). The anti-drip assembly (2) includes a connecting pipe (201) and a tapered hose (202) fixed below the connecting pipe (201). The connecting pipe (201) is located inside the conveying pipe (101), and the tapered hose (202) is located inside the dispensing head (102). A positioning block (5) that mates with the positioning groove (4) is fixed on the side of the connecting pipe (201). A locking hole (501) is provided on the positioning block (5). The positioning hole (401) is aligned with the locking hole (501) and fixed by the locking assembly (3). A leak-proof ring (2021) is fixed to the outlet below the conical hose (202). Both the leak-proof ring (2021) and the conical hose (202) are made of elastic material, and the leak-proof ring (2021) is filled with gas. The locking assembly (3) includes a U-shaped frame (301), a movable plate (302), a pull rod (303), a spring (304), a connecting plate (305), and a locking insert (306). The U-shaped frame (301) is fixed to the outside of the positioning groove (4), the movable plate (302) is located between the U-shaped frame (301) and the positioning groove (4), and the pull rod (303) passes through the U-shaped frame (301) and is connected to the movable plate (302). The spring (304) is parallel to the pull rod (303) and fixed between the movable plate (302) and the U-shaped frame (301). The connecting plate (305) is fixed at the end of the pull rod (303) away from the movable plate (302). The locking rod (306) is fixed on the movable plate (302). The locking rod (306) passes through the positioning hole (401) and is inserted into the locking hole (501) to fix the anti-drip component (2).

2. The anti-drip dispensing needle structure according to claim 1, characterized in that: The inner wall of the connecting sleeve (103) is provided with threads.

3. The anti-drip dispensing needle structure according to claim 1, characterized in that: A sealing gasket (2011) is fixed above the connecting pipe (201).

4. The anti-drip dispensing needle structure according to claim 1, characterized in that: A pull ring (3051) is fixed on the connecting plate (305).

Images