Sealing structure of needle tube and needle head

Abstract

The utility model discloses a sealing structure of a needle tube and a needle head, which relates to the field of cosmetic sealing and comprises a sealing cover, a storage tank mounted at the bottom of the sealing cover, a sealing component mounted on one side of the sealing cover, a connector mounted on one side of the storage tank, and a liquid sealing pad mounted on one side of the connector. According to the sealing structure of the needle tube and the needle head, the friction force between a sealing ring and a sealing cover is enhanced through a plurality of annular grooves formed in the outer side of the sealing ring in the sealing assembly, the sealing stability is ensured, the sealing ring can be tightly arranged on a conical body of a connector in a sleeving mode through a sealing hole groove, and the top of the sealing hole groove abuts against the top of the conical body; liquid is effectively prevented from leaking from the connecting position, the liquid sealing pad is arranged on the outer side of the middle piece in a sleeving mode and abuts against the top of the lower column body through the sealing pad, an additional sealing layer is formed, the liquid sealing pad can be attached to the connector more tightly through the arrangement of the annular groove, the stability of the liquid sealing pad is guaranteed through the installation hole, and leakage caused by looseness is prevented.

Description

Technical Field

[0001] The utility model relates to the sealing technology of cosmetics, in particular to a sealing structure between a syringe barrel and a needle head. Background Art

[0002] Cosmetics refer to chemical industrial products or fine chemical products that are applied, sprayed or otherwise dispersed on any part of the human body surface, such as skin, hair, fingernails, lips and teeth, etc., for the purpose of cleaning, maintaining, beautifying, modifying and changing appearance, or correcting body odor and maintaining a good state.

[0003] The existing sealing methods for cosmetics generally use metal and plastic for sealing, but due to the material properties between metal and plastic, the sealing effect is poor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing structure between a syringe barrel and a needle head to solve the above deficiencies in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A sealing structure between a syringe barrel and a needle head, including a sealing cap, further including:

[0006] A storage tank, which is installed at the bottom of the sealing cap;

[0007] A sealing component, which is installed on one side of the sealing cap;

[0008] A connector, which is installed on one side of the storage tank;

[0009] A liquid sealing gasket, which is installed on one side of the connector.

[0010] Further, the connector includes an upper cylinder;

[0011] A liquid guide pipe, which is opened at the top of the connector and extends through to the bottom of the connector;

[0012] A cone, which is fixedly installed at one end of the upper cylinder, and the cross-section of the cone is trapezoidal;

[0013] A conical body, which is fixedly installed at the other end of the cone, and the cross-section of the conical body is trapezoidal;

[0014] An intermediate member, which is fixedly installed at the other end of the upper cylinder;

[0015] A lower cylinder, which is fixedly installed at the other end of the intermediate member;

[0016] The axes of the upper cylinder, the cone, the conical body, the intermediate member and the lower cylinder coincide.

[0017] Further, the sealing component includes a sealing ring;

[0018] A plurality of annular grooves are linearly arrayed and formed on the outer side of the sealing ring;

[0019] A sealing hole groove is formed at the bottom of the sealing ring, and the diameter of the sealing hole groove is smaller than the outer diameter of the conical body. The top of the sealing hole groove abuts against the top of the conical body.

[0020] Furthermore, the liquid sealing gasket includes:

[0021] A sealing gasket is sleeved on the outer side of the intermediate member, and the bottom of the sealing gasket abuts against the top of the lower cylinder;

[0022] An annular groove is formed at the top of the sealing gasket, and the inner wall dimension of the annular groove is adapted to the outer dimension of the bottom of the upper cylinder;

[0023] An installation hole is formed at the top of the sealing gasket and extends through to the bottom of the sealing gasket, and the inner wall dimension of the installation hole is smaller than the outer dimension of the intermediate member.

[0024] Furthermore, the sealing cover includes a protective shell;

[0025] A housing cavity is formed at the bottom of the protective shell, and the inner diameter dimension of the housing cavity is adapted to the outer diameter of the sealing ring;

[0026] Threads are formed at the bottom of the housing cavity of the protective shell.

[0027] Furthermore, the storage tank includes a tank body;

[0028] A fixed head is fixedly installed at the top of the tank body, and the outer dimension of the fixed head is smaller than the outer dimension of the tank body;

[0029] An installation cavity is formed at the top of the fixed head and extends through to the bottom of the fixed head, and the installation cavity is sleeved on the outer side of the sealing gasket. The outer side of the sealing gasket abuts against the inner side of the installation cavity, and the top dimension of the installation cavity is smaller than the outer dimension of the sealing gasket;

[0030] External threads are formed on the outer side of the fixed head, and the external threads can be threadedly connected with the threads formed on the protective shell;

[0031] A connection cavity is formed through the top of the tank body, and the inner diameter dimension of the connection cavity is larger than the inner diameter dimension of the installation cavity.

[0032] Compared with the prior art, for a needle tube and needle head sealing structure provided by the present utility model, a plurality of annular grooves provided on the outer side of the sealing ring in the sealing assembly enhance the friction force between the sealing ring and the sealing cover, ensuring the stability of the seal. The sealing hole groove enables the sealing ring to be tightly sleeved on the conical body of the connecting head, and the top of the sealing hole groove abuts against the top of the conical body, effectively preventing liquid from leaking from the connection.

[0033] The liquid sealing gasket is sleeved outside the middle piece and abuts against the top of the lower cylinder through the sealing gasket, forming an additional sealing layer. The setting of the annular groove enables the liquid sealing gasket to fit more tightly on the connector, while the installation holes ensure the stability of the liquid sealing gasket during installation and prevent leakage caused by loosening.

[0034] The threaded connection between the storage tank and the sealing cover realizes the stable sealing of the overall structure, and at the same time makes the liquid guide pipe fit more tightly against the sealing ring, enhancing the sealing performance of the device.

[0035] The sealing structure of the syringe and the needle head realizes efficient sealing in terms of storage, connection and overall structure through the coordinated cooperation of the structures, effectively preventing liquid leakage and contamination. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0037] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present utility model;

[0038] Figure 2 Exploded schematic diagram of the overall structure provided by the embodiment of the present utility model;

[0039] Figure 3 Cross-sectional schematic diagram of the overall structure provided by the embodiment of the present utility model;

[0040] Figure 4 Schematic diagram of the structure of the sealing component and the storage tank provided by the embodiment of the present utility model.

[0041] Explanation of the reference numerals in the drawings:

[0042] 1. Sealing cover; 2. Storage tank; 3. Sealing component; 4. Connector; 5. Liquid sealing gasket; 11. Protective shell; 12. Shell cavity; 21. Tank body; 22. Connection cavity; 23. External thread; 24. Fixed head; 25. Installation cavity; 31. Sealing ring; 32. Annular groove; 33. Sealing hole groove; 41. Upper cylinder; 42. Cone; 43. Cone body; 44. Middle piece; 45. Lower cylinder; 46. Liquid guide pipe; 51. Sealing gasket; 52. Annular groove; 53. Installation hole. Detailed Description of the Embodiment

[0043] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0044] Embodiment 1:

[0045] Please refer to Figures 1 - 4 , a sealing structure for a syringe and a needle, including a sealing cap 1, and further including:

[0046] A storage tank 2, which is installed at the bottom of the sealing cap 1;

[0047] A sealing assembly 3, which is installed on one side of the sealing cap 1;

[0048] A connector 4, which is installed on one side of the storage tank 2;

[0049] A liquid sealing gasket 5, which is installed on one side of the connector 4.

[0050] The specific implementation method is: The storage tank 2 and the connector 4 are made of metal, the sealing assembly 3 and the liquid sealing gasket 5 are both made of silica gel. The silica gel adopts a secondary injection molding process, and the material characteristics of the silica gel are used to wrap the liquid outlet of the metal part, so that a better sealing effect is achieved between the metal and the plastic part.

[0051] The connector 4 includes an upper cylinder 41;

[0052] A liquid guiding tube 46, which is opened at the top of the connector 4 and extends through to the bottom of the connector 4;

[0053] A cone 43, which is fixedly installed at one end of the upper cylinder 41, and the cross-section of the cone 43 is trapezoidal;

[0054] A conical body 42, which is fixedly installed at the other end of the cone 43, and the cross-section of the conical body 42 is trapezoidal;

[0055] An intermediate piece 44, which is fixedly installed at the other end of the upper cylinder 41;

[0056] A lower cylinder 45, which is fixedly installed at the other end of the intermediate piece 44;

[0057] The axes of the upper cylinder 41, the cone 43, the conical body 42, the intermediate piece 44 and the lower cylinder 45 coincide.

[0058] The specific implementation method is: The connector 4 includes an upper cylinder 41, a cone 43, a conical body 42, an intermediate piece 44 and a lower cylinder 45. The axes of all components coincide. One end of the upper cylinder 41 is fixedly installed with the cone 43. The cross-section of the cone 43 is trapezoidal. The other end of the cone 43 is fixedly installed with the conical body 42 with a rectangular cross-section. The top of the conical body 42 is in close fit with the sealing hole groove 33 to prevent liquid from flowing out of the sealing assembly 3 through the conical body 42. The liquid guiding tube 46 extends through from the top to the bottom of the connector 4 to form a complete passage.

[0059] The sealing assembly 3 includes a sealing ring 31;

[0060] A plurality of annular grooves 32, which are linearly arrayed and opened on the outer side of the sealing ring 31;

[0061] A sealing hole groove 33, which is opened at the bottom of the sealing ring 31, and the diameter dimension of the sealing hole groove 33 is smaller than the outer diameter dimension of the conical body 42, and the top of the sealing hole groove 33 abuts against the top of the conical body 42.

[0062] The specific implementation method is as follows: The sealing assembly 3 is composed of a sealing ring 31 and a plurality of annular grooves 32. The annular grooves 32 are linearly arrayed on the outer side of the sealing ring 31, enhancing the sealing effect between the sealing ring 31 and the housing cavity 12 and the connector 4. A sealing hole groove 33 is provided at the bottom of the sealing ring 31, and its diameter is smaller than the outer diameter of the conical body 42. When installed in place, the top of the sealing hole groove 33 closely abuts against the top of the conical body 42 to form a sealing barrier.

[0063] The liquid sealing gasket 5 includes:

[0064] A sealing gasket 51, which is sleeved on the outer side of the intermediate member 44, and the bottom of the sealing gasket 51 abuts against the top of the lower cylinder 45;

[0065] An annular groove 52, which is opened at the top of the sealing gasket 51, and the inner wall dimension of the annular groove 52 is adapted to the outer dimension of the bottom of the upper cylinder 41;

[0066] An installation hole 53, which is opened at the top of the sealing gasket 51 and extends through to the bottom of the sealing gasket 51, and the inner wall dimension of the installation hole 53 is smaller than the outer dimension of the intermediate member 44.

[0067] The specific implementation method is as follows: The liquid sealing gasket 5 includes a sealing gasket 51, an annular groove 52 and an installation hole 53. The sealing gasket 51 is sleeved on the outer side of the intermediate member 44. The inner top of the sealing gasket 51 is fixedly connected to the bottom of the upper cylinder 41 through a secondary injection molding process. The middle part of the sealing gasket 51 is fixed to the intermediate member 44. The bottom of the sealing gasket 51 closely abuts against the top of the lower cylinder 45 to ensure the stability and sealing performance of the sealing gasket 51 on the intermediate member 44.

[0068] The sealing cover 1 includes a protective shell 11;

[0069] A housing cavity 12, which is opened at the bottom of the protective shell 11, and the inner diameter dimension of the housing cavity 12 is adapted to the outer diameter dimension of the sealing ring 31;

[0070] Threads are provided at the bottom of the housing cavity 12 of the protective shell 11.

[0071] The specific implementation method is as follows: The sealing cover 1 includes a protective shell 11. A shell cavity 12 is opened at the bottom of the protective shell 11. The inner diameter size of the shell cavity 12 is precisely matched with the outer diameter size of the sealing ring 31 to ensure that the sealing ring 31 can be stably installed in the shell cavity 12. At the bottom of the shell cavity 12, there is also a circle of threads for threaded connection with the fixed head 24 of the storage tank 2.

[0072] The storage tank 2 includes a tank body 21;

[0073] A fixed head 24, which is fixedly installed at the top of the tank body 21, and the outer size of the fixed head 24 is smaller than the outer size of the tank body 21;

[0074] An installation cavity 25, which is opened at the top of the fixed head 24 and extends through to the bottom of the fixed head 24, and the installation cavity 25 is sleeved outside the sealing gasket 51. The outside of the sealing gasket 51 abuts against the inside of the installation cavity 25, and the top size of the installation cavity 25 is smaller than the outside size of the sealing gasket 51;

[0075] An external thread 23, which is opened on the outside of the fixed head 24, and the external thread 23 can be threadedly connected with the thread opened on the protective shell 11;

[0076] A connection cavity 22, which is penetrated and opened at the top of the tank body 21, and the inner diameter size of the connection cavity 22 is larger than the inner diameter size of the installation cavity 25.

[0077] Embodiment 2:

[0078] Please refer to Figures 1 - 3 , on the basis of Embodiment 1, this embodiment provides a technical solution: including a sealing cover 1, and further including:

[0079] A storage tank 2, which is installed at the bottom of the sealing cover 1;

[0080] A sealing assembly 3, which is installed on one side of the sealing cover 1;

[0081] A connection head 4, which is installed on one side of the storage tank 2;

[0082] A liquid sealing gasket 5, which is installed on one side of the connection head 4.

[0083] The connection head 4 includes an upper cylinder 41;

[0084] A liquid guiding pipe 46, which is opened at the top of the connection head 4 and extends through to the bottom of the connection head 4;

[0085] A cone 43, which is fixedly installed at one end of the upper cylinder 41, and the cross-section of the cone 43 is trapezoidal;

[0086] A frustum 42, which is fixedly installed at the other end of the cone 43, and the cross-section of the frustum 42 is rectangular;

[0087] The middleware 44 is fixedly installed at the other end of the upper cylinder 41;

[0088] The lower cylinder 45 is fixedly installed at the other end of the middleware 44;

[0089] The axes of the upper cylinder 41, the cone 43, the conical body 42, the middleware 44 and the lower cylinder 45 coincide.

[0090] The liquid seal gasket 5 includes:

[0091] The sealing gasket 51 is sleeved on the outside of the middleware 44, and the bottom of the sealing gasket 51 abuts against the top of the lower cylinder 45;

[0092] The annular groove 52 is opened at the top of the sealing gasket 51, and the inner wall size of the annular groove 52 is adapted to the outer size of the bottom of the upper cylinder 41;

[0093] The mounting hole 53 is opened at the top of the sealing gasket 51 and extends through to the bottom of the sealing gasket 51, and the inner wall size of the mounting hole 53 is smaller than the outer size of the middleware 44.

[0094] The sealing cover 1 includes the protective shell 11;

[0095] The housing cavity 12 is opened at the bottom of the protective shell 11, and the inner diameter size of the housing cavity 12 is adapted to the outer diameter size of the sealing ring 31;

[0096] Threads are provided at the bottom of the housing cavity 12 of the protective shell 11.

[0097] The storage tank 2 includes the tank body 21;

[0098] The fixed head 24 is fixedly installed at the top of the tank body 21, and the outer size of the fixed head 24 is smaller than the outer size of the tank body 21;

[0099] The mounting cavity 25 is opened at the top of the fixed head 24 and extends through to the bottom of the fixed head 24, and the mounting cavity 25 is sleeved on the outside of the sealing gasket 51, the outside of the sealing gasket 51 abuts against the inside of the mounting cavity 25, and the top size of the mounting cavity 25 is smaller than the outside size of the sealing gasket 51;

[0100] The external thread 23 is provided on the outside of the fixed head 24, and the external thread 23 can be threadedly connected with the thread provided on the protective shell 11;

[0101] The connection cavity 22 is penetrated and opened at the top of the tank body 21, and the inner diameter size of the connection cavity 22 is larger than the inner diameter size of the mounting cavity 25.

[0102] The specific implementation is as follows: The storage tank 2 includes a tank body 21, a fixed head 24, an installation cavity 25, an external thread 23, and a connection cavity 22. The fixed head 24 is fixedly installed at the top of the tank body 21, and its outer dimension is smaller than the outer dimension of the tank body 21, which is convenient for threaded connection with the sealing cover 1. The installation cavity 25 is opened at the top of the fixed head 24 and extends through to its bottom, and is used to accommodate and fix the sealing gasket 51 and the upper cylinder body 41. The inner side of the installation cavity 25 is in close contact with the outer side of the sealing gasket 51, and the top dimension of the installation cavity 25 is smaller than the outer dimension of the sealing gasket 51 to ensure that the sealing gasket 51 will not fall off after installation. The external thread 23 is opened on the outer side of the fixed head 24 and matches the thread at the bottom of the housing cavity 12 of the sealing cover 1, and the storage tank 2 and the sealing cover 1 are tightly connected by rotation. The bottom of the lower cylinder body 45 is snap-connected to the top of the connection cavity 22.

[0103] Working principle: When in use, first, the sealing gasket 51 is fixed on the outer side of the middle piece 44 by secondary injection molding, and then the connecting head 4 is passed through the installation cavity 25 opened in the fixed head 24. The installation cavity 25 positions the sealing gasket 51 inside it to form a seal. The sealing cover 1 is installed on the top of the storage tank 2. At this time, the conical body 42 is located in the sealing hole groove 33 opened in the sealing assembly 3. The connecting head 4 presses the sealing assembly 3, and the sealing assembly 3 completely blocks the liquid guide pipe 46. The greater the pressure of the sealing cover 1 on the connecting head 4, the greater the pressure of the sealing assembly 3 on the connecting head 4, and the stronger the sealing performance. Moreover, the sealing assembly 3 is made of silicone by secondary injection molding, so that the sealing assembly 3 maintains strong recoverability and good sealing effect.

[0104] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A sealing structure for a needle tube and a needle, comprising a sealing cover (1), characterized in that: Also includes: A storage tank (2) mounted on the bottom of the sealing cover (1); A sealing assembly (3), which is installed on one side of the sealing cover (1); A connector (4) mounted on one side of the storage tank (2); A liquid sealing gasket (5) is installed on one side of the connecting head (4).

2. A sealing structure for a needle tube and a needle according to claim 1, characterized in that: The connector (4) comprises an upper cylinder (41); A fluid guide tube (46) is provided at the top of the connector (4) and extends through the connector (4) to the bottom of the connector (4); A cone (43) is fixedly mounted on one end of the upper column (41), and the cross section of the cone (43) is trapezoidal; A cone (42) is fixedly mounted on the other end of the cone (43), and the cross section of the cone (42) is trapezoidal; An intermediate member (44) is fixedly mounted on the other end of the upper cylinder (41); A lower column (45) is fixedly mounted on the other end of the middle member (44); The axes of the upper cylinder (41), the cone (43), the cone (42), the middle piece (44) and the lower cylinder (45) coincide with each other.

3. A sealing structure for a needle tube and a needle according to claim 2, characterized in that: The sealing assembly (3) comprises a sealing ring (31); A plurality of annular grooves (32) are distributed in a linear array and are arranged outside the sealing ring (31); The sealing hole groove (33) is provided at the bottom of the sealing ring (31), and the diameter of the sealing hole groove (33) is smaller than the outer diameter of the cone (42), and the top of the sealing hole groove (33) abuts against the top of the cone (42).

4. A sealing structure for a needle tube and a needle according to claim 2, characterized in that: The liquid seal gasket (5) comprises: A sealing gasket (51) is sleeved on the outside of the middle piece (44), and the bottom of the sealing gasket (51) abuts against the top of the lower column (45); An annular groove (52) is formed on the top of the sealing gasket (51), and the inner wall size of the annular groove (52) is adapted to the outer side size of the bottom of the upper cylinder (41); The mounting hole (53) is opened at the top of the sealing gasket (51) and extends through the sealing gasket (51) to the bottom, and the inner wall size of the mounting hole (53) is smaller than the outer side size of the middle piece (44).

5. The sealing structure of a needle tube and a needle according to claim 3, characterized in that: The sealing cover (1) comprises a protective shell (11); A housing cavity (12) is opened at the bottom of the protective shell (11), and the inner diameter of the housing cavity (12) is adapted to the outer diameter of the sealing ring (31); The bottom of the housing cavity (12) of the protective shell (11) is provided with threads.

6. A sealing structure for a needle tube and a needle according to claim 5, characterized in that: The storage tank (2) comprises a tank body (21); A fixed head (24) is fixedly mounted on the top of the tank body (21), and the outer dimension of the fixed head (24) is smaller than the outer dimension of the tank body (21); An installation cavity (25) is provided at the top of the fixed head (24) and extends through to the bottom of the fixed head (24), and the installation cavity (25) is sleeved on the outside of the sealing gasket (51), the outside of the sealing gasket (51) abuts against the inside of the installation cavity (25), and the top size of the installation cavity (25) is smaller than the outside size of the sealing gasket (51); An external thread (23) is formed on the outside of the fixing head (24), and the external thread (23) can be threadedly connected with a thread formed on the protective shell (11); The connecting cavity (22) is opened through the top of the tank body (21), and the inner diameter of the connecting cavity (22) is larger than the inner diameter of the installation cavity (25).

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