Filling needle mounting structure

Abstract

The utility model discloses a filling needle mounting structure which comprises a filling needle and a filling needle seat, a needle seat hole is formed in the filling needle seat, the filling needle is arranged in the needle seat hole in a penetrating mode, and a limiting groove is formed in the outer wall of the filling needle. And a locking piece and an elastic piece for driving the locking piece to be clamped into the limiting groove are arranged on one side of the needle seat hole of the filling needle seat. The filling needle penetrates through the needle seat hole to be positioned, the limiting groove is formed in the outer wall of the filling needle, and the elastic piece drives the locking piece to be clamped into the limiting groove, so that the filling needle is prevented from moving up and down, the structure is simple, and the reliability is good. When the filling needle needs to be detached, the locking piece is separated from the limiting groove after the elastic force of the elastic piece is manually overcome, the filling needle can be pulled out of the needle seat hole, tools are not needed, operation in equipment such as an isolator is more convenient, and efficiency is higher.

Description

Technical Field

[0001] This utility model relates to food and pharmaceutical packaging equipment, and more particularly to a filling needle mounting structure. Background Technology

[0002] Currently, there are two main types of installation structures for injection needles:

[0003] The first type is as follows Figure 1 As shown, the needle holder is made of PEEK material (polyetheretherketone, a high-performance engineering plastic with good thermal stability and mechanical properties). By controlling the fit tolerance between the needle holder hole and the outer diameter of the filling needle, the filling needle is quickly clamped into place and has a certain clamping force. The defects of this structure are: first, there is no upper and lower limit after the filling needle is installed. Although there is a certain clamping force, it is too small. With long-term use, there is a risk that the filling needle will move up and down, causing the filling needle to hit the inner wall of the bottle; second, the PEEK material will deform after long-term use, causing the inner hole tolerance to become out of control, the gap between the needle holder and the filling needle to increase, and thus the filling needle will loosen.

[0004] The second type is as follows Figure 2 As shown, the needle holder is made of stainless steel (e.g., S30408). After the filling needle passes through the needle holder hole and fits against the needle holder, the filling needle is tightened with a screw. This helps prevent the filling needle from moving up and down and is not easily deformed or loosened after long-term use. The disadvantage of this structure is that it requires tools to disassemble and install. When installed in equipment such as isolators, it is necessary to wear protective gloves, which is inconvenient to operate and has low installation efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a simple needle installation structure that can prevent vertical movement and does not require special tools for disassembly and assembly.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A filling needle mounting structure includes a filling needle and a filling needle seat. The filling needle seat has a needle seat hole, and the filling needle passes through the needle seat hole. A limiting groove is provided on the outer wall of the filling needle. The filling needle seat has a locking member and an elastic member for driving the locking member to engage in the limiting groove on one side of the needle seat hole.

[0008] As a further improvement to the above technical solution: the injection needle seat is provided with a sleeve, the locking member passes through the sleeve, the elastic member is sleeved on the outer periphery of the locking member, the locking member is provided with a first stop part, the sleeve is provided with a second stop part, and the elastic member abuts between the first stop part and the second stop part.

[0009] As a further improvement to the above technical solution: the sleeve is provided with a third stop, which is located on the side of the first stop near the injection needle.

[0010] As a further improvement to the above technical solution: the sleeve and the filling needle seat are connected by a thread, and the second stop part is connected to the sleeve by a thread.

[0011] As a further improvement to the above technical solution: the end of the locking member away from the injection needle passes through the second stop and is connected to a cap, and the sleeve is located inside the cap.

[0012] As a further improvement to the above technical solution: the cap has flat portions on opposite sides, and a protrusion is formed on the side of the flat portion away from the needle seat.

[0013] As a further improvement to the above technical solution: the locking member is hinged to the injection needle seat, one end of the locking member is provided with a hook-shaped part for engaging in the limiting groove, and the elastic member abuts between the other end of the locking member and the injection needle seat.

[0014] As a further improvement to the above technical solution: an anti-rotation structure is provided between the injection needle and the injection needle seat to prevent relative rotation.

[0015] As a further improvement to the above technical solution: the injection needle is provided with a first anti-rotation plane, the first anti-rotation plane is located above the limiting groove, the top of the injection needle seat is provided with an anti-rotation protrusion, and the side of the anti-rotation protrusion near the injection needle is provided with a second anti-rotation plane, the second anti-rotation plane being in close contact with the first anti-rotation plane.

[0016] As a further improvement to the above technical solution: a notch is provided on one side of the needle seat hole, through which the needle tube of the injection needle can pass.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] This utility model discloses a filling needle mounting structure in which the filling needle is positioned by passing through a needle seat hole. A limiting groove is provided on the outer wall of the filling needle. An elastic element drives a locking element to engage in the limiting groove, thereby preventing the filling needle from moving up and down. The structure is simple and reliable. When the filling needle needs to be disassembled, the elastic force of the elastic element is manually overcome to separate the locking element from the limiting groove, allowing the filling needle to be pulled out of the needle seat hole without the need for tools. This makes operation inside isolators and other equipment more convenient and efficient.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the first existing injection needle mounting structure.

[0021] Figure 2 This is a schematic diagram of the existing second type of injection needle mounting structure.

[0022] Figure 3 This is a perspective view of Embodiment 1 of the injection needle installation structure of this utility model.

[0023] Figure 4 This is a cross-sectional view of Embodiment 1 of the injection needle mounting structure of this utility model.

[0024] Figure 5 This is a perspective view of Embodiment 2 of the injection needle installation structure of this utility model.

[0025] Figure 6 This is a cross-sectional view of Embodiment 2 of the injection needle mounting structure of this utility model.

[0026] The labels in the diagram represent:

[0027] 1. Filling needle; 11. Limiting groove; 12. First anti-rotation plane; 2. Filling needle seat; 21. Needle seat hole; 22. Second anti-rotation plane; 23. Anti-rotation protrusion; 24. Notch; 3. Locking element; 31. First stop; 32. Hook-shaped part; 4. Elastic element; 5. Sleeve; 51. Second stop; 52. Third stop; 6. Cap; 61. Pin; 62. Flat part; 63. Protrusion. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] Figures 3 to 4 This illustration shows one embodiment of the injection needle mounting structure of this utility model. The injection needle mounting structure of this embodiment includes an injection needle 1 and an injection needle seat 2. The injection needle seat 2 has a needle seat hole 21, through which the injection needle 1 passes. A limiting groove 11 is provided on the outer wall of the injection needle 1. The injection needle seat 2 has a locking member 3 and an elastic member 4 for driving the locking member 3 into the limiting groove 11 on one side of the needle seat hole 21. Preferably, the injection needle seat 2 is made of stainless steel (e.g., S30408), which has high strength and is easy to machine; the elastic member 4 is a helical spring, but in other embodiments, it can also be an elastic rope, an elastic rubber block, etc.

[0034] In this embodiment, the injection needle mounting structure has an injection needle 1 positioned within the needle seat hole 21. A limiting groove 11 is provided on the outer wall of the injection needle 1. An elastic element 4 drives a locking element 3 to engage in the limiting groove 11, thus preventing the injection needle 1 from moving up and down. The structure is simple and reliable. When the injection needle 1 needs to be disassembled, the locking element 3 is separated from the limiting groove 11 by manually overcoming the elastic force of the elastic element 4, allowing the injection needle 1 to be pulled out of the needle seat hole 21 without the need for tools. This makes operation inside devices such as isolators more convenient and efficient.

[0035] See details Figure 4 In this embodiment, the injection needle holder 2 is provided with a sleeve 5, a locking member 3 passes through the sleeve 5, and an elastic member 4 is sleeved on the outer periphery of the locking member 3. The locking member 3 is provided with a first stop 31, and the sleeve 5 is provided with a second stop 51. The elastic member 4 abuts against the first stop 31 and the second stop 51. The elastic member 4 can drive the locking member 3 to engage in the limiting groove 11 through the first stop 31. The sleeve 5 can provide a guiding function for the locking member 3 to prevent the locking member 3 from shifting. The structure is simple and reliable. Conversely, when it is necessary to disassemble the injection needle 1, the locking member 3 is manually pulled outward to separate from the limiting groove 11, while the first stop 31 compresses the elastic member 4. Preferably, the first stop 31 is a radial flange structure with high strength.

[0036] Furthermore, in this embodiment, the sleeve 5 is provided with a third stop 52, which is located on the side of the first stop 31 near the filling needle 1. When the first stop 31 contacts the third stop 52, the locking member 3 cannot continue to move into the limiting groove 11, thus preventing the locking member 3 from impacting the filling needle 1 under the elastic force of the elastic member 4, causing the filling needle 1 to deform or be damaged.

[0037] In a preferred embodiment, the sleeve 5 and the filling needle seat 2 are connected by threads, and the second stop part 51 is connected to the sleeve 5 by threads, which provides good connection reliability and convenient disassembly and assembly.

[0038] Furthermore, in this embodiment, the end of the locking member 3 furthest from the filling needle 1 passes through the second stop portion 51 and is connected to a cap 6, with the sleeve 5 located inside the cap 6. The locking member 3 can be pulled by the cap 6, making operation more convenient, and the cap 6 can also provide a shielding and protective function, preventing components from being exposed and improving the appearance quality. Preferably, the locking member 3 and the cap 6 are connected by a pin 61, which has a simple structure and reliable connection.

[0039] In a preferred embodiment, the cap 6 has flat portions 62 on opposite sides, and a protrusion 63 is formed on the side of the flat portion 62 away from the needle holder 2. The protrusion 63 can act as a limit, making it easy to pull the cap 6 and preventing it from slipping out of the hand. Preferably, the pin 61 is located in the flat portion 62, which facilitates the machining of a pin hole for the pin 61 to pass through in the flat portion 62.

[0040] See details Figure 3 In this embodiment, an anti-rotation structure is provided between the filling needle 1 and the filling needle seat 2 to prevent relative rotation. The locking member 3 can prevent the filling needle 1 from moving up and down, but it cannot prevent the filling needle 1 from rotating. The anti-rotation structure between the filling needle 1 and the filling needle seat 2 can further restrict the rotation of the filling needle 1 on the filling seat 2.

[0041] Furthermore, in this embodiment, the filling needle 1 is provided with a first anti-rotation plane 12, which is located above the limiting groove 11. The top of the filling needle seat 2 is provided with an anti-rotation protrusion 23, and a second anti-rotation plane 22 is provided on the side of the anti-rotation protrusion 23 near the filling needle 1. The second anti-rotation plane 22 is in close contact with the first anti-rotation plane 12. Since the second anti-rotation plane 22 is in close contact with the first anti-rotation plane 12, the filling needle 1 can be effectively prevented from rotating on the filling seat 2, resulting in a simple and reliable structure.

[0042] Furthermore, in this embodiment, a notch 24 is provided on one side of the needle seat hole 21, through which the needle tube of the injection needle 1 can pass. When installing the injection needle 1, the needle tube can be inserted into the injection needle seat 2 through the notch 24, without having to raise the injection needle 1 to a higher position and then pass it through the needle seat hole 21 from top to bottom. The structure is simple and effective.

[0043] The installation process of the filling needle 1 in this embodiment is as follows:

[0044] Insert the needle tube portion of the injection needle 1 into the injection needle seat 2 through the notch 24. Align the first anti-rotation plane 12 of the injection needle 1 with the second anti-rotation plane 22. Pull the cap 6 to make the locking member 3 exit the needle seat hole 21. Then move the injection needle 1 downward until the stepped surface at the upper end of the injection needle 1 contacts the top of the needle seat hole 21. Finally, release the cap 6. The elastic member 4 drives the locking member 3 to engage in the limiting groove 11 through the first stop portion 31. The installation of the injection needle 1 can be completed quickly.

[0045] Example 2

[0046] Figures 5 to 6 This invention illustrates another embodiment of the injection needle mounting structure. This embodiment is essentially the same as the first embodiment, except that:

[0047] In this embodiment, the locking member 3 is hinged to the filling needle seat 2. One end of the locking member 3 is provided with a hook-shaped part 32 for engaging in the limiting groove 11, and the elastic member 4 is abutted between the other end of the locking member 3 and the filling needle seat 2.

[0048] See details Figure 6 When it is necessary to disassemble the filling needle 1, manually press the lower end of the locking part 3 to overcome the elastic force of the elastic part 4 and separate the hook-shaped part 32 at the upper end of the locking part 3 from the limiting groove 11. Then the filling needle 1 can be pulled out from the needle seat hole 21 without the need for tools. This makes it more convenient and efficient to operate inside equipment such as isolators.

[0049] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A needle filling installation structure comprising a needle (1) and a needle seat (2), wherein a needle seat hole (21) is provided on the needle seat (2), and the needle (1) is arranged in the needle seat hole (21), characterized in that: The outer wall of the injection needle (1) is provided with a limiting groove (11), and the injection needle seat (2) is provided with a locking member (3) and an elastic member (4) for driving the locking member (3) to be engaged in the limiting groove (11) on one side of the needle seat hole (21).

2. The needle filling installation structure according to claim 1, characterized by: The needle holder (2) is provided with a sleeve (5), the locking member (3) is inserted into the sleeve (5), the elastic member (4) is sleeved on the outer periphery of the locking member (3), the locking member (3) is provided with a first stop (31), the sleeve (5) is provided with a second stop (51), and the elastic member (4) abuts between the first stop (31) and the second stop (51).

3. The needle filling installation according to claim 2, wherein: The sleeve (5) is provided with a third stop (52), which is located on the side of the first stop (31) near the injection needle (1).

4. The needle filling installation structure according to claim 2, wherein: The sleeve (5) is threadedly connected to the needle holder (2), and the second stop (51) is threadedly connected to the sleeve (5).

5. The needle filling installation structure according to claim 2, wherein: The locking member (3) has one end away from the filling needle (1) that passes through the second stop (51) and is connected to a cap (6), and the sleeve (5) is located inside the cap (6).

6. The needle filling installation according to claim 5, wherein: The cap (6) has flat portions (62) on opposite sides, and a protrusion (63) is formed on the side of the flat portion (62) away from the needle seat (2).

7. The needle filling installation according to claim 1, wherein: The locking member (3) is hinged to the injection needle seat (2). One end of the locking member (3) is provided with a hook-shaped part (32) for engaging in the limiting groove (11). The elastic member (4) is abutted between the other end of the locking member (3) and the injection needle seat (2).

8. The needle filling installation according to any one of claims 1 to 7, characterized in that: An anti-rotation structure is provided between the injection needle (1) and the injection needle seat (2) to prevent relative rotation.

9. The needle filling installation according to claim 8, wherein: The injection needle (1) is provided with a first anti-rotation plane (12), which is located above the limiting groove (11). The injection needle seat (2) is provided with an anti-rotation protrusion (23) at the top. The anti-rotation protrusion (23) is provided with a second anti-rotation plane (22) on the side of the anti-rotation protrusion (23) close to the injection needle (1). The second anti-rotation plane (22) is in close contact with the first anti-rotation plane (12).

10. The needle filling installation according to any one of claims 1 to 7, characterized in that: The needle seat hole (21) has a notch (24) on one side for the needle tube of the injection needle (1) to pass through.

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