Radio frequency connector and method of encapsulating the same

Abstract

Disclosed are a radio frequency connector and a packaging method thereof, the packaging method comprising the following steps: placing a plastic shell of an at least partially metal shell accommodating a ring outside an at least partially metal terminal into a cavity of a mold; wherein a filling space is formed between one end of the plastic shell and the metal shell; injecting hot melt adhesive into the cavity under predetermined conditions; wherein the predetermined conditions include that the injection time is 1-20.4 seconds and / or the injection pressure is lower than 7 MPa, further, the injection time is 1.8-20 seconds, and the injection pressure is 0.3-6.8 MPa; further, the injection time is 2.13-15.24 seconds, and the injection pressure is 0.35-5.23 MPa; curing the hot melt adhesive to form a sealing fixing member of an integrally formed structure at least partially filled in the filling space, and constructing a non-detachable structure of the metal shell and the plastic shell. The radio frequency connector and the packaging method thereof provided in the specification can simplify the sealing structure.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of connector, in particular to a radio frequency connector and a packaging method thereof. BACKGROUND

[0002] Radio frequency connector is usually attached to cable or equipment for transmission line system electrical connection, which is a separable component. FAKRA connector is designed for automotive applications, generally used in automotive industry RF radio frequency signal connector, GPS positioning system, satellite radio, vehicle internet access. FAKRA connector is usually detachably assembled on the fixed seat by means of fastener, and it is mainly composed of protective shell, inner shielding shell, plastic plug and metal terminal.

[0003] At present, the assembly process of FAKRA connector is relatively complex, generally needs to insert the connector sleeve into the plastic shell after setting the sealing ring, and needs to put the waterproof gasket and metal plug in the rear end for sealing, and finally the cable and the connector are connected by heat shrink tube. Not only leads to the sealing measures of FAKRA connector complex, but also the assembly process is complex. SUMMARY

[0004] In view of the deficiencies of the prior art, one object of the present specification is to provide a radio frequency connector and a packaging method thereof, which can simplify the sealing structure.

[0005] To achieve the above-mentioned purpose, the packaging method of the radio frequency connector provided by the embodiment of the present specification comprises the following steps:

[0006] Placing the plastic shell of the metal shell at least partially sleeved with the containing ring outside the metal terminal in the cavity of the mold; wherein, the plastic shell has a filling space between one end and the metal shell;

[0007] The predetermined conditions include that the injection time is 1-20.4 seconds and / or the injection pressure is lower than 7 MPa, further, the injection time is 1.8-20 seconds, and the injection pressure is 0.3-6.8 MPa; still further, the injection time is 2.13-15.24 seconds, and the injection pressure is 0.35-5.23 MPa;

[0008] Curing the hot melt adhesive to form a sealing fixing part of an integrally formed structure at least partially filled in the filling space, and constructing the non-detachable structure of the metal shell and the plastic shell.

[0009] As a preferred embodiment, in the step of injecting hot melt adhesive into the cavity under predetermined conditions, the injection time is 2-20 seconds, and the injection pressure is 0.05-0.3 MPa.

[0010] As a preferred embodiment, in the step of injecting hot melt adhesive into the cavity under predetermined conditions, the temperature of one or more of the glue cylinder, glue gun and glue pipe is maintained below 240°C.

[0011] As a preferred embodiment, the temperature of the glue cylinder, the glue gun and the glue pipe is maintained below 210°C, such as 170-210°C.

[0012] As a preferred embodiment, in the step of curing the hot melt adhesive, the holding time is set to 10-50 seconds, and the cooling time is set to 10-50 seconds.

[0013] As a preferred embodiment, in the step of injecting hot melt adhesive into the cavity under predetermined conditions, the glue injection rotation speed is set below 100 revolutions per minute.

[0014] As a preferred embodiment, in the step of injecting hot melt adhesive into the cavity under predetermined conditions and the step of curing the hot melt adhesive, the mold temperature is maintained at 15-25°C.

[0015] As a preferred embodiment, before the step of injecting hot melt adhesive into the cavity under predetermined conditions, it further comprises:

[0016] The surface of the plastic shell in contact with the sealing fixture is treated to have a roughness of Ra3.2±0.5.

[0017] As a preferred embodiment, before the step of injecting hot melt adhesive into the cavity under predetermined conditions, it further comprises:

[0018] The plastic shell is subjected to plasma surface treatment using a plasma treatment device.

[0019] As a preferred embodiment, in the step of performing plasma surface treatment, the flow rate of argon is 400-600 SCCM; the flow rate of oxygen is 400-600 SCCM; the ratio of argon to oxygen is 0.8-1.2:1.

[0020] As a preferred embodiment, in the step of performing plasma surface treatment, the power of the plasma treatment device is 350-450 watts; the treatment time is 450-500 seconds.

[0021] As a preferred embodiment, in the step of performing plasma surface treatment, the oxygen gas flow pressure is 0.3-0.4 MPa; the argon gas flow pressure is 0.3-0.4 MPa; the backing vacuum is 10-50 Pa; the vacuum working pressure is 50-65 Pa.

[0022] As a preferred embodiment, in the step of performing the plasma surface treatment, the flow rate of argon is 500 SCCM; the flow rate of oxygen is 500 SCCM; the ratio of argon and oxygen is 1:1; the power of the plasma treatment device is 400 watts; the treatment time is 480 seconds; the oxygen gas flow pressure is 0.35 MPa; the argon gas flow pressure is 0.35 MPa; the background vacuum is 30 Pa; and the vacuum working pressure is 57 Pa.

[0023] The present disclosure also provides a packaging method of a radio frequency connector, comprising the following steps:

[0024] Placing a plastic housing of the metal housing at least partially surrounding the metal terminal into a cavity of a mold; wherein the plastic housing is provided with a protrusion and / or a recess, and a filling space is formed between one end of the plastic housing and the metal housing;

[0025] Injecting hot melt adhesive into the cavity, and the hot melt adhesive is solidified to form a sealing fixing member of an integrally formed structure at least partially filling in the filling space; wherein at least part of the sealing fixing member is in contact with the protrusion, and / or at least part of the sealing fixing member fills the recess; and the metal housing and the plastic housing form an inseparable structure through the sealing fixing member.

[0026] The present disclosure also provides a radio frequency connector, comprising:

[0027] A metal terminal;

[0028] A metal housing surrounding at least part of the metal terminal;

[0029] A plastic housing for accommodating the metal housing; a filling space is formed between one end of the plastic housing and the metal housing;

[0030] A sealing fixing member of an integrally formed structure formed by injecting hot melt adhesive under the condition that the injection time is 1.5-20.4 seconds and / or the injection pressure is 0.045-0.345 MPa; at least part of the sealing fixing member fills in the filling space, and the metal housing and the plastic housing form an inseparable structure through the sealing fixing member.

[0031] The present disclosure also provides a radio frequency connector, comprising:

[0032] A metal terminal;

[0033] A metal housing surrounding at least part of the metal terminal;

[0034] The plastic shell is provided with a protrusion and / or a recess, and a filling space is formed between one end of the plastic shell and the metal shell;

[0035] The sealing fixing member is an integral structure, at least part of the sealing fixing member is filled in the filling space, and the sealing filling between one end of the plastic shell and the metal shell is achieved. At least part of the sealing fixing member is in contact with the protrusion, and / or at least part of the sealing fixing member fills the recess. The metal shell and the plastic shell form an inseparable structure through the sealing fixing member.

[0036] Advantages:

[0037] The radio frequency connector and the packaging method thereof provided by the embodiment can form the sealing fixing member of the integral structure by injecting the hot melt adhesive under the condition that the injection time is 1.5-20.4 seconds and / or the injection pressure is 0.045-0.345 MPa, and the sealing fixing member is at least partially filled in the filling space, so that the inseparable structure of the metal shell and the plastic shell is constructed, and the sealing structure of the radio frequency connector is simplified.

[0038] The radio frequency connector and the packaging method thereof provided by the embodiment, the plastic shell is provided with a protrusion and / or a recess, so that when the sealing fixing member of the integral structure is formed, at least part of the sealing fixing member is filled in the filling space between one end of the plastic shell and the metal shell, and at least part of the sealing fixing member is in contact with the protrusion, and / or at least part of the sealing fixing member fills the recess. Through the contact between the sealing fixing member and the protrusion and / or the recess, the contact area between the sealing fixing member and the plastic shell is increased, and the connection between the sealing fixing member and the plastic shell is tight, so that the connection is not easy to be separated.

[0039] Specific embodiments of the application are disclosed in detail in the following description and claims. Specific embodiments of the application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0040] Features described and / or illustrated with respect to one embodiment can be used in the same or similar manner in one or more other embodiments, in combination with or in place of features in other embodiments, or in place of features in other embodiments.

[0041] It should be emphasized that the term "comprises / comprising" when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to make the technical solutions of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0043] Figure 1 Structure diagram of a radio frequency connector provided in the embodiment;

[0044] Figure 2 Structure diagram of a plastic shell provided in the embodiment;

[0045] Figure 3 Structure diagram of another radio frequency connector provided in the embodiment;

[0046] Figure 4 Structure diagram of still another radio frequency connector provided in the embodiment, in which the sealing fixing member is assumed to be transparent so that the protruding part and the recessed part can be seen;

[0047] Figure 5 Flow diagram of a packaging method of a radio frequency connector provided in the embodiment;

[0048] Figure 6 Flow diagram of a packaging method of another radio frequency connector provided in the embodiment;

[0049] Figure 7 Flow diagram of a packaging method of still another radio frequency connector provided in the embodiment.

[0050] Explanation of reference numerals:

[0051] 10, metal terminal;

[0052] 20, metal shell; 21, front pipe part; 22, rear pipe part;

[0053] 30, plastic shell; 31, front end; 32, rear end; 33, protruding part; 331, first section; 332, second section; 333, third section; 334, fourth section; 34, connecting part; 35, recessed part; 36, step surface;

[0054] 40, sealing fixing member; 41, filling part; 42, extending part; 43, sleeving part;

[0055] 50, cable; 51, core wire; 52, inner insulation layer; 53, outer insulation layer;

[0056] 60, plastic member. DETAILED DESCRIPTION

[0057] In order to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of the present application.

[0058] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustration purposes only and are not intended to be limiting.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the terms "and / or" includes any and all combinations of one or more of the associated listed items.

[0060] Reference will now be made to Figures 1 to 4 The embodiments of the present application provide a radio frequency connector, which comprises a metal terminal 10, a metal shell 20, a plastic shell 30 and a sealing fixing member 40.

[0061] The metal shell 20 is sleeved on at least part of the metal terminal 10. The plastic shell 30 is used for accommodating the metal shell 20. The plastic shell 30 is provided with a protruding portion 33 and / or a recessed portion 35. The plastic shell 30 has a filling space between one end thereof and the metal shell 20. The sealing fixing member 40 is an integral structure. At least part of the sealing fixing member 40 is filled in the filling space, so as to seal and fill between one end of the plastic shell 30 and the metal shell 20. At least part of the sealing fixing member 40 is in contact with the protruding portion 33, and / or at least part of the sealing fixing member 40 fills the recessed portion 35. The metal shell 20 and the plastic shell 30 form an inseparable structure through the sealing fixing member 40.

[0062] The radio frequency connector provided by the embodiment has the protruding portion 33 and / or the recessed portion 35 on the plastic shell 30, so that at least part of the sealing fixing member 40 contacts the protruding portion 33 when the sealing fixing member 40 fills the filling space between the plastic shell 30 and the metal shell 20, and / or at least part of the sealing fixing member 40 fills the recessed portion 35. Through the contact between the sealing fixing member 40 and the protruding portion 33 and / or the recessed portion 35, the contact area between the sealing fixing member 40 and the plastic shell 30 is increased, and the connection between the sealing fixing member 40 and the plastic shell 30 is tight, so that the connection is not easy to be disconnected.

[0063] In the embodiment, the radio frequency connector is a FAKRA connector. Of course, the radio frequency connector can also be other types of connectors, which are not limited in the application.

[0064] The metal terminal 10 in the embodiment can be a metal core in the shape of a needle body, or can be a metal tube body for insertion into the metal core. The metal core of one radio frequency connector can be inserted into the metal tube body of another radio frequency connector, and the two radio frequency connectors are connected as a male head and a female head, respectively. The number of the metal terminal 10 and the metal shell 20 is not limited in the embodiment, and in the embodiment, the number of the metal terminal 10 and the metal shell 20 is one. In other embodiments, the number of the metal terminal 10 and the metal shell 20 can be set as needed.

[0065] In the embodiment, the plastic shell 30 has opposite front and rear ends 31 and 32, and the filling space is between the rear end 32 and the metal shell 20. Specifically, the plastic shell 30 can extend from the front end 31 to the rear end 32. The metal terminal 10 can be positioned in the metal shell 20 by the plastic member 60. The metal shell 20 can include a magnetic shielding shell to improve the shielding performance of the radio frequency connector, so that the signal is not disturbed by the external magnetic field during transmission. In addition, by providing the metal shell 20, the structural strength of the radio frequency connector can be improved, the internal metal terminal 10 is prevented from being deformed and damaged during installation, and the connection reliability and installation accuracy are ensured.

[0066] The magnetic shielding shell is a metal cylindrical structure, which is sleeved outside the metal terminal 10. The magnetic shielding shell corresponds to the metal terminal 10 one by one, that is, the number of the magnetic shielding shell is the same as that of the metal terminal 10. The extension direction of the magnetic shielding shell and the metal terminal 10 can be from the front end 31 to the rear end 32, that is, the extension directions of the magnetic shielding shell, the metal terminal 10 and the plastic shell 30 can be the same, and they are coaxially arranged.

[0067] Further, the metal shell 20 can further comprise a connecting shell which can be fixedly connected to the outside of the magnetic shielding shell. Specifically, the connecting shell can be located outside the front end 31 of the plastic shell 30. The connecting shell can be provided with a connecting hole or other connecting structure to facilitate the connection of the radio frequency connector to other components.

[0068] In one embodiment, the plastic shell 30 can entirely wrap the metal shell 20 away from the surface of the metal terminal 10 in the extension direction of the metal terminal 10. In this embodiment, the front end 31 of the plastic shell 30 is flush with the end of the metal shell 20 close to the front end 31, and the rear end 32 of the plastic shell 30 extends beyond the end of the metal shell 20 close to the rear end 32, i.e., the length of the plastic shell 30 is greater than the length of the metal shell 20 in the extension direction of the metal terminal 10.

[0069] In another embodiment, the plastic shell 30 can partially wrap the metal shell 20 away from the surface of the metal terminal 10 in the extension direction of the metal terminal 10, and the metal shell 20 can have a connecting shell which is not wrapped by the shell. In this embodiment, the end of the metal shell 20 close to the front end 31 extends beyond the front end 31 of the plastic shell 30, and the rear end 32 of the plastic shell 30 extends beyond the end of the metal shell 20 close to the rear end 32, i.e., the length of the plastic shell 30 can be greater than, less than or equal to the length of the metal shell 20 in the extension direction of the metal terminal 10.

[0070] In this way, the metal shell 20 is wrapped in the plastic shell 30, or the end of the metal shell 20 extends beyond the front end 31 of the plastic shell 30, and the connecting shell extending beyond the front end 31 of the plastic shell 30 can be provided with a connecting end such as a flange or an ear.

[0071] In the present embodiment, the radio frequency connector can further comprise a cable 50 electrically connected to the metal terminal 10. The core wire 51 of the cable 50 extends into the metal shell 20 and is electrically connected to the end of the metal terminal 10 close to the rear end 32. Specifically, one end of the cable 50 extends into the metal shell 20 in the sealing fixture 40 and is electrically connected to the end of the metal terminal 10 close to the rear end 32. Part of the sealing fixture 40 wraps the cable 50.

[0072] In the present embodiment, the front end 31 of the plastic shell 30 can be a front tube structure, and the front end 31 of the plastic shell 30 is wrapped outside the metal shell 20 and the metal terminal 10. The metal terminal 10 is coaxially arranged in the metal shell 20, and the metal shell 20 is coaxially arranged in the lumen of the front end 31 of the plastic shell 30.

[0073] In the embodiment, the rear end 32 of the plastic shell 30 can be an open structure, and a low-pressure injection molding device can inject hot melt glue into the interior of the rear end 32 of the plastic shell 30 through the open structure, and form the sealing fixing member 40 after solidification.

[0074] Specifically, the sealing fixing member 40 includes a filling portion 41 located in the filling space and an extending portion 42 located outside the filling space. The extending portion 42 is located on the side of the filling portion 41 away from the plastic shell 30 in the extending direction of the cable 50. The filling portion 41 is filled between the metal shell 20 and the plastic shell 30, and the extending portion 42 is sleeved on the cable 50 outside the plastic shell 30. The radio frequency connector provided in the embodiment seals and fills between the plastic shell 30 and the metal shell 20 by providing the sealing fixing member 40, thereby simplifying the sealing structure of the radio frequency connector.

[0075] The shape of the filling portion 41 is determined according to the space (filling space) between the inner wall of the rear end 32 of the metal shell 20 and the plastic shell 30. The extending portion 42 is located on the side of the filling portion 41 away from the plastic shell 30 in the extending direction of the cable 50. The extending portion 42 extends backward and blocks the open structure of the rear end 32. The extending portion 42 wraps and fixes the cable 50 outside the plastic shell 30.

[0076] In the embodiment, the sealing fixing member 40 is bonded to the plastic shell 30. The sealing fixing member 40 is an integral structure formed by hot melt glue solidification, and the hot melt glue has the advantages of convenient storage, no pollution, non-toxicity, high bonding strength, and fast speed. Of course, in other embodiments, the material of the sealing fixing member 40 can be selected from other materials that can be integrally formed by low-pressure injection molding, and the application does not make a unique limitation on this. The sealing fixing member 40 is bonded to the inner wall of the plastic shell 30 during solidification. The filling portion 41 wraps the metal shell 20 in the plastic shell 30 and fills the external space, thereby realizing the sealing between the metal shell 20 and the plastic shell 30.

[0077] As shown in Figure 1 The cable 50 has an outer insulating layer 53 and a core wire 51. The outer insulating layer 53 is sleeved on the core wire 51. The end of the sealing fixing member 40 away from the plastic shell 30 is directly bonded to the outer insulating layer 53. An electromagnetic shielding layer can also be provided outside the core wire 51. The metal shell 20 is in electrical contact with the electromagnetic shielding layer of the cable 50. An inner insulating layer 52 is also provided between the core wire 51 and the electromagnetic shielding layer to separate them.

[0078] In the embodiment, part of the sealing fixing member 40 sleeves part of the metal shell 20. As shown in Figure 1As shown, part of the sealing fixing member 40 is sleeved between the plastic shell 30 and the metal shell 20, filling the space between the rear end 32 of the plastic shell 30 and the metal shell 20, and also fixing the position of the metal shell 20, improving the structural strength. The metal shell 20 can have an outer end extending out of the plastic shell 30. The sealing fixing member 40 is sleeved outside the outer end.

[0079] In the embodiment as shown, Figure 1 In the embodiment as shown, the metal shell 20 has a rear tube part 22 extending in the same direction as the cable 50. The cable 50 extends into the rear tube part 22 and is electrically connected with the metal terminal 10. The filling part 41 fills between one end of the rear tube part 22 and the inner wall of the plastic shell 30. The metal shell 20 further has a front tube part 21 perpendicular to the rear tube part 22. The metal terminal 10 is coaxially fixed in the front tube part 21. The front tube part 21 is located in the plastic shell 30 and coaxially arranged with the plastic shell 30. The metal shell 20 can be a tube structure in "L" shape or a cylindrical structure. The metal shell 20 provides a space for accommodating the metal terminal 10 and a space for connecting the metal terminal 10 with the cable 50.

[0080] The length of the sealing fixing member 40 extending out of the plastic shell 30 in the direction of the cable 50 is greater than the length of the metal shell 20 extending out of the plastic shell 30. One end of the metal shell 20 extends out of the plastic shell 30, and the outer end is wrapped by the sealing fixing member 40. Part of the sealing fixing member 40 is directly sleeved outside the cable 50, avoiding the exposure of the metal shell 20.

[0081] In the embodiment as shown, Figure 3 In the embodiment as shown, the radio frequency connector is a straight connector. The metal terminal 10, the metal shell 20 and the cable 50 are coaxially arranged. The filling part 41 is sleeved between the metal shell 20 and the plastic shell 30, and the extending part 42 is sleeved outside the cable 50 and the metal shell 20 outside the plastic shell 30.

[0082] In the embodiment as shown, Figure 3 In order to improve the sealing and waterproof performance, the sealing fixing member 40 further includes a sleeving part 43 in the embodiment as shown. The sleeving part 43 is sleeved outside the rear end 32 of the plastic shell 30, so that the sealing fixing member 40 is arranged on both sides of the rear end 32 of the plastic shell 30.

[0083] As shown, Figure 2 In one embodiment, the protruding part 33 is located in the plastic shell 30 and between the front end 31 and the rear end 32, so that the sealing fixing member 40 filled in the filling space can contact with the protruding part 33, increasing the contact area between the sealing fixing member 40 and the plastic shell 30, and making the connection between the sealing fixing member 40 and the plastic shell 30 more closely, so that they are not easy to be separated.

[0084] Specifically, the inner wall of the plastic shell 30 can be provided with a connecting portion 34 for supporting the protruding portion 33. The protruding portion 33 can be connected to the connecting portion 34 away from the end of the plastic shell 30. The connecting portion 34 can be annular, with its inner wall surface connected to the protruding portion 33 and its outer wall surface connected to the plastic shell 30.

[0085] The extension direction of the protruding portion 33 can be the same as the extension direction of the plastic shell 30, and an open rear-end filling cavity is formed between the protruding portion 33 and the inner wall of the plastic shell 30. The rear-end opening of the filling cavity facilitates the entry of hot melt adhesive, avoiding the difficulty of adhesive entry and poor forming effect. That is, the protruding portion 33 extends in the direction from the front end 31 to the rear end 32, thereby significantly increasing the contact area between the sealing and fixing member 40 and the plastic shell 30. The protruding portion 33 does not exceed the rear end of the plastic shell 30, and the length of the protruding portion 33 in the direction from the front end 31 to the rear end 32 can be greater than or equal to 2 mm.

[0086] In other embodiments, at least part of the protruding portion 33 can extend in the radial direction of the plastic shell 30, that is, at least part of the protruding portion 33 extends perpendicular to the direction from the front end 31 to the rear end 32, thereby forming a hook structure between the sealing and fixing member 40 and the plastic shell 30, and having a better anti-dropping effect.

[0087] As shown in Figure 2 The protruding portion 33 can have a first segment 331 and a second segment 332 connected in the direction from the front end 31 to the rear end 32. The first segment 331 is connected to the connecting portion 34 to provide a connection position for the protruding portion 33.

[0088] Preferably, in the direction from the front end 31 to the rear end 32, the outer diameter of the first segment 331 is constant, and the outer diameter of the second segment 332 gradually decreases, so that the radial dimension of at least part of the sealing and fixing member 40 gradually increases in the direction from the front end 31 to the rear end 32. Alternatively, in the direction from the front end 31 to the rear end 32, the outer diameter of the second segment 332 gradually increases, so that the radial dimension of at least part of the sealing and fixing member 40 gradually decreases in the direction from the front end 31 to the rear end 32, and the anti-dropping effect between the sealing and fixing member 40 and the plastic shell 30 is better.

[0089] In the present embodiment, the inner diameters of the first segment 331 and the second segment 332 can be equal. In other embodiments, the inner diameters of the first segment 331 and the second segment 332 can not be equal, thereby changing the shape of the sealing and fixing member 40 and optimizing the anti-dropping effect.

[0090] As shown in Figure 2As shown, the plastic shell 30 can be provided with a stepped surface 36, which is in contact with the sealing fixing member 40. The stepped surface 36 can be located on the inner wall of the plastic shell 30 or on the outer wall of the rear end 32 of the plastic shell 30. When the stepped surface 36 is located on the inner wall of the plastic shell 30, the stepped surface 36 is specifically located between the protruding portion 33 and the rear end 32. The stepped surface 36 can further increase the contact area between the plastic shell 30 and the sealing fixing member 40, thereby optimizing the anti-disengagement effect.

[0091] To improve the bonding effect and the anti-disengagement probability, part of the connecting surface (such as the stepped surface 36) between the plastic shell 30 and the sealing fixing member 40 is configured as a rough surface. Preferably, the stepped surface 36 has a predetermined roughness, thereby improving the bonding between the plastic shell 30 and the sealing fixing member 40 and achieving the anti-disengagement effect. Specifically, the stepped surface 36 can be treated to have a predetermined roughness. In a specific embodiment, the roughness can be VDI30 (i.e. Ra3.2). The protruding portion 33 (filling cavity) and the stepped surface 36 are both located on the rear tube portion 22, so as to facilitate the injection and contact of the glue solution.

[0092] The stepped surface 36 can be multiple, annular and arranged in the direction from the front end 31 to the rear end 32. The number of the stepped surface 36 is not limited in the present embodiment and can be selected as appropriate according to the needs.

[0093] As shown in FIG. 1, Figure 4 In another embodiment, the protruding portion 33 is located outside the plastic shell 30 and at the rear end 32 of the plastic shell 30, and part of the sealing fixing member 40 is located outside the protruding portion 33, so that the sealing fixing member 40 can have good contact with the plastic shell 30 provided with the protruding portion 33 and tightly fit with the plastic shell 30.

[0094] Specifically, the recessed portion 35 can be multiple and arranged on the outer surface of the protruding portion 33 in the circumferential direction, and part of the sealing fixing member 40 fills the recessed portion 35, thereby further optimizing the anti-disengagement effect. The recessed portion 35 can be cylindrical or have other shapes, which are not limited in the present application.

[0095] In a preferred embodiment, the protruding portion 33 has a third segment 333 and a fourth segment 334 connected in the direction from the front end 31 to the rear end 32. The recessed portion 35 is located on the third segment 333, and the outer diameter of the third segment 333 is smaller than that of the fourth segment 334. The sealing fixing member 40 can not only fill into the recessed portion 35, but also form a stepped structure at the connection between the third segment 333 and the fourth segment 334, thereby further optimizing the anti-disengagement effect.

[0096] In other embodiments, the recess 35 can be arranged on the inner wall or the outer wall of the plastic shell 30, and at least part of the sealing fixture 40 fills the recess 35, so that the plastic shell 30 and the sealing fixture 40 are in close contact, and an anti-disengagement structure filling the recess 35 is formed, thereby optimizing the anti-disengagement effect.

[0097] In one embodiment, the metal shell 20 and / or the plastic shell 30 can be coated with an adhesion layer to improve the adhesion and bonding between the plastic shell 30 and the sealing fixture 40, and / or between the metal shell 20 and the sealing fixture 40, so that the structure is more stable and reliable. Alternatively, the surface of the plastic shell can be subjected to plasma treatment to improve the activity of the surface of the plastic shell, thereby improving the adhesion between the plastic shell and the sealing fixture 40.

[0098] The present embodiment provides a radio frequency connector, which includes a metal terminal 10, a metal shell 20, a plastic shell 30, and a sealing fixture 40.

[0099] The metal shell 20 is sleeved around at least part of the metal terminal 10. The plastic shell 30 is used to accommodate the metal shell 20. The plastic shell 30 has a filling space between one end of the plastic shell 30 and the metal shell 20. The sealing fixture 40 is an integrally formed structure formed by injecting hot melt glue under the condition that the injection time is 1.5-20.4 seconds and / or the injection pressure is 0.045-0.345 MPa. At least part of the sealing fixture 40 fills the filling space, and the metal shell 20 and the plastic shell 30 form a non-detachable structure through the sealing fixture 40.

[0100] The radio frequency connector provided by the present embodiment can construct a non-detachable structure of the metal shell 20 and the plastic shell 30 by injecting hot melt glue under the condition that the injection time is 1.5-20.4 seconds and / or the injection pressure is 0.045-0.345 MPa, and curing to form the sealing fixture 40 of the integrally formed structure which is at least partially filled in the filling space, thereby simplifying the sealing structure of the radio frequency connector.

[0101] Please refer to FIG. 5. The present embodiment provides a packaging method of a radio frequency connector, which includes the following steps:

[0102] Step S100: placing the plastic shell 30 accommodating at least part of the metal shell 20 sleeved around at least part of the metal terminal 10 in a cavity of a mold.

[0103] The plastic shell 30 has a filling space between one end of the plastic shell 30 and the metal shell 20.

[0104] Step S200: injecting hot melt glue into the cavity under a predetermined condition.

[0105] The predetermined condition includes a glue injection time of 1-20.4 seconds and / or a glue injection pressure of less than 7 MPa. Further, the glue injection time is 1.8-20 seconds, and the glue injection pressure is 0.3-6.8 MPa. Further, the glue injection time is 2.13-15.24 seconds, and the glue injection pressure is 0.35-3.23 MPa.

[0106] Step S300: curing the hot melt glue to form a sealing fixture of an integrally formed structure at least partially filled in the filling space, to construct the non-detachable structure of the metal shell and the plastic shell.

[0107] The encapsulation method of the radio frequency connector provided by the embodiment can inject hot melt glue under the condition of a glue injection time of 1.5-20.4 seconds and / or a glue injection pressure of 0.35-3.23 MPa, and cure to form a sealing fixture 40 of an integrally formed structure at least partially filled in the filling space, to construct the non-detachable structure of the metal shell 20 and the plastic shell 30, thereby simplifying the sealing structure of the radio frequency connector.

[0108] In the embodiment, the mold with the cavity can be used for low-pressure injection molding, and the shape of the mold and the cavity can be designed according to the shape of the radio frequency connector, which is not uniquely limited in the application.

[0109] Preferably, in step S200, the glue injection time is 2-20 seconds, and the glue injection pressure is 0.35-3.23 MPa, so that the sealing fixture 40 formed by curing the glue injection can better construct the non-detachable structure of the metal shell 20 and the plastic shell 30.

[0110] In step S200, the temperature of one or more of the glue cylinder, the glue gun, and the glue pipe can be maintained below 240°C. Preferably, the temperature of the glue cylinder, the glue gun, and the glue pipe is maintained below 210°C, such as 170-210°C.

[0111] Specifically, in the step of curing the hot melt glue, the holding time is set to 10-50 seconds, and the cooling time is set to 10-50 seconds. In step S200, the glue injection rotation speed is set to be lower than 100 revolutions per minute. In the steps of injecting hot melt glue into the cavity under the predetermined condition and curing the hot melt glue, the mold temperature is maintained at 15-25°C.

[0112] In a preferred embodiment, before step S200, the surface of the plastic shell 30 in contact with the sealing fixture 40 can also be treated as a rough surface with a predetermined roughness.

[0113] The predetermined roughness can be VDI30 (i.e. Ra3.2). The roughness of the surface of the plastic shell 30 is increased, and the surface of the plastic shell 30 in contact with the sealing fixing member 40 is a rough surface. The adhesion between the plastic shell 30 and the sealing fixing member 40 is improved, and the plastic shell 30 and the sealing fixing member 40 are prevented from being separated.

[0114] As shown in FIG. 1, the method can further include the following steps before step S200: Figure 6

[0115] Step S101: performing plasma surface treatment on the plastic shell 30 by using a plasma treatment device.

[0116] In step S101, the surface activity of the plastic shell 30 is improved by performing plasma surface treatment on the plastic shell 30, and the adhesion between the plastic shell 30 and the sealing fixing member 40 is improved.

[0117] In the plasma surface treatment on the plastic shell 30 by using the plasma treatment device, the flow rate of argon is 400-600 SCCM, the flow rate of oxygen is 400-600 SCCM, the ratio of argon to oxygen is 0.8-1.2:1, the power of the plasma treatment device is 350-450 W, the treatment time is 450-500 seconds, the oxygen flow pressure is 0.3-0.4 MPa, the argon flow pressure is 0.3-0.4 MPa, the background vacuum is 10-50 Pa, and the vacuum working pressure is 50-65 Pa. SCCM refers to Standard Cubic Centimeter / Minute, i.e. the number of cubic centimeters flowing per minute under standard conditions.

[0118] In a specific embodiment, the flow rate of argon can be 500 SCCM, the flow rate of oxygen can be 500 SCCM, the ratio of argon to oxygen can be 1:1, the power of the plasma treatment device can be 400 W, the treatment time can be 480 seconds, the oxygen flow pressure can be 0.35 MPa, the argon flow pressure can be 0.35 MPa, the background vacuum can be 30 Pa, and the vacuum working pressure can be 57 Pa.

[0119] In the embodiment, in step S100, the metal terminal 10 is electrically connected with the cable 50. Accordingly, the upper step S101 can include: performing plasma surface treatment on the plastic shell 30 and the cable 50, and equalizing the surface tension of the plastic shell 30 and the cable 50. Specifically, the plastic shell 30 and the cable 50 can be respectively or jointly placed in the cavity of the plasma treatment device for surface treatment. The working parameters of the plasma treatment device refer to the working parameters of the plasma treatment on the plastic shell 30. After the treatment, the surface tension of the shell and the cable can be ensured to be uniform by hydrophilic or daoyin pen test. ​

[0120] In the embodiment, after step S101 and before step S200, a primer can be applied to the plastic housing 30 and the cable 50.

[0121] The primer can be applied evenly to the surfaces of the plastic housing 30 and the cable 50 by spraying or brushing, which can improve adhesion and the bonding performance between the plastic housing 30 and the sealing fixture 40 and between the cable 50 and the sealing fixture 40. Specifically, a brush can be used to apply the primer evenly to the surfaces of the plastic housing 30 and the cable 50. In particular, the primer needs to be applied to the cable 50 at a length of 2-3 cm at the crimping position to ensure that the entire circumference of the cable 50 is coated with the primer.

[0122] Specifically, the metal terminal 10 and the metal housing 20 are pre-positioned in the plastic housing 30, and the cable 50 is electrically connected to the metal terminal 10. The plastic housing 30 with the metal terminal 10 and the metal housing 20 and the cable 50 are placed together in a mold cavity for low-pressure injection molding to form a sealing fixture 40 with an integrated structure.

[0123] Preferably, after step S300, an appearance inspection can be performed to determine whether the appearance and size of the completed radio frequency connector meet the requirements.

[0124] Referring to Figure 7 The application also provides a packaging method for a radio frequency connector, which includes the following steps:

[0125] Step S400: Placing the plastic housing 30, which contains at least part of the metal housing 20 outside at least part of the metal terminal 10, in a mold cavity of a mold.

[0126] The plastic housing 30 is provided with a protruding portion 33 and / or a recessed portion 35, and the plastic housing 30 has a filling space between one end and the metal housing 20.

[0127] Step S500: Injecting hot melt adhesive into the mold cavity, and the hot melt adhesive solidifies to form a sealing fixture 40 with an integrated structure that is at least partially filled in the filling space.

[0128] At least part of the sealing fixture 40 is in contact with the protruding portion 33, and / or at least part of the sealing fixture 40 fills the recessed portion 35; and the metal housing 20 and the plastic housing 30 form a non-detachable structure through the sealing fixture 40.

[0129] The encapsulation method of the radio frequency connector provided by the embodiment provides the plastic shell 30 with the protrusion 33 and / or the recess 35, so that at least part of the sealing fixing member 40 is filled in the filling space between one end of the plastic shell 30 and the metal shell 20 when the sealing fixing member 40 forms an integrally formed structure, and at least part of the sealing fixing member 40 is in contact with the protrusion 33, and / or at least part of the sealing fixing member 40 fills the recess 35. Through the contact between the sealing fixing member 40 and the protrusion 33 and / or the recess 35, the contact area between the sealing fixing member 40 and the plastic shell 30 is increased, and the connection between the sealing fixing member 40 and the plastic shell 30 is tight, so that it is not easy to be separated.

[0130] In the embodiment, the related features of the protrusion 33 and / or the recess 35 can be referred to the related description in the foregoing radio frequency connector, which will not be described here again.

[0131] It should be noted that in the description of the present specification, the terms "first", "second", and the like are only for the purpose of description and distinguishing similar objects, and there is no sequence between them, nor can it be understood or implied as indicating or implying relative importance. In addition, in the description of the present specification, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0132] Any numerical value cited herein encompasses all values from the lower value to the upper value in increments of one unit, provided that there are at least two units of separation between any lower value and any higher value. In other words, if a value for a quantity of a component or a process variable (e.g., temperature, pressure, time, etc.) is stated as from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended to state explicitly also values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. For values less than 1, it is appropriate to consider one unit as 0.0001, 0.001, 0.01, 0.1. These are merely examples of what is intended to be explicitly stated, and all possible combinations of numerical values between the lowest value and the highest value stated in the specification can be considered to be explicitly stated in a similar manner.

[0133] Unless otherwise stated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" as applied to a range generally means that the range is intended to cover the two endpoints and all numbers between the endpoints. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0134] All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of to describe a combination shall include the elements, ingredients, components or steps identified, and such other elements, ingredients, components or steps that do not materially affect the basic and novel characteristics of the combination. The use of the term "comprising" or "including" to describe combinations of elements, ingredients, components or steps herein also is taken to mean that other elements, ingredients, components or steps are optional in an embodiment of the present teachings to the extent that "comprising" or "including" is used. The use of the term "about" to describe any property, parameter or value is meant to convey that the exact value need not be used, but that the desired range is within 10% of the exact value.

[0135] Plural elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step might be divided into separate plural elements, ingredients, components or steps. To the extent any of the above descriptions are presented in terms of methods, acts or steps, it should be understood that such methods, acts or steps can be performed in the order presented, or in any other order that is logically possible.

[0136] It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and applications other than the examples provided would be apparent to those of skill in the art upon reading the above description. The scope of the teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated by reference for all purposes. The omission of any aspect of the subject matter disclosed herein does not preclude coverage of that aspect of the subject matter in the claims.

Claims

1. A method of encapsulating a radio frequency connector, the method comprising: The method comprises the following steps: placing a plastic shell containing a metal terminal and a metal shell outside the metal terminal into a cavity of a mold; wherein, a filling space is formed between one end of the plastic shell and the metal shell; the metal terminal is electrically connected with a cable; the metal terminal and the metal shell are arranged in the plastic shell in advance, and the cable is electrically connected with the metal terminal; the plastic shell with the metal terminal and the metal shell and the cable are placed into the cavity of the mold together; performing plasma surface treatment on the plastic shell and the cable by using a plasma treatment device, and equalizing the surface tension of the plastic shell and the cable; applying a primer to the plastic shell and the cable; and uniformly applying the primer to a 2cm-3mm ring of the cable crimping part and the plastic shell; injecting hot melt adhesive into the cavity under predetermined conditions; wherein, the predetermined conditions include an injection time of 1-20.4 seconds and / or an injection pressure of less than 7 MPa, further, the injection time is 1.8-20 seconds, and the injection pressure is 0.3-6.8 MPa; further, the injection time is 2.13-15.24 seconds, and the injection pressure is 0.35-3.23 MPa; curing the hot melt adhesive to form a sealing fixing member of an integrally formed structure at least partially filled in the filling space, and constructing a non-detachable structure of the metal shell and the plastic shell.

2. The method of packaging a radio frequency connector of claim 1, wherein, In the step of injecting the hot melt adhesive into the cavity under the predetermined conditions, the temperature of one or more of an adhesive cylinder, an adhesive gun, and an adhesive pipe is maintained below 240 DEG C; further, the temperature of the adhesive cylinder, the adhesive gun, and the adhesive pipe is maintained below 210 DEG C.

3. The method of packaging a radio frequency connector of claim 1, wherein, In the step of curing the hot melt adhesive, the holding time is set to 10-50 seconds, and the cooling time is set to 10-50 seconds.

4. The method of packaging a radio frequency connector of claim 1, wherein, In the step of injecting the hot melt adhesive into the cavity under the predetermined conditions, the injection rotation speed is set to be lower than 100 rpm.

5. The method of packaging a radio frequency connector of claim 1, wherein, In the steps of injecting the hot melt adhesive into the cavity under the predetermined conditions and curing the hot melt adhesive, the mold temperature is maintained at 15-25 DEG C.

6. The method of packaging a radio frequency connector of claim 1, wherein, Before the step of injecting the hot melt adhesive into the cavity under the predetermined conditions, the method further comprises: treating the surface of the plastic shell in contact with the sealing fixing member into a rough surface with a roughness of Ra3.2±0.

5.

7. The method of packaging a radio frequency connector of claim 1, wherein, In the step of performing the plasma surface treatment, the flow rate of argon is 400-600 SCCM; the flow rate of oxygen is 400-600 SCCM; the ratio of argon to oxygen is 0.8-1.2:1; the power of the plasma treatment device is 350-450 W; the treatment time is 450-500 seconds; the oxygen flow pressure is 0.3-0.4 MPa; the argon flow pressure is 0.3-0.4 MPa; the backing vacuum is 10-50 Pa; and the vacuum working pressure is 50-65 Pa.

8. The method of packaging a radio frequency connector of claims 1 or 7, wherein, The step of performing the plasma surface treatment has an argon flow rate of 500 SCCM, an oxygen flow rate of 500 SCCM, an argon-to-oxygen ratio of 1:1, a power of 400 watts, a treatment time of 480 seconds, an oxygen gas flow pressure of 0.35 MPa, an argon gas flow pressure of 0.35 MPa, a backing vacuum of 30 Pa, and a vacuum working pressure of 57 Pa.

9. A method of encapsulating a radio frequency connector, the method comprising: The method comprises the following steps: The plastic shell of the metal terminal is placed in the cavity of the mold; wherein, the plastic shell is provided with a protrusion and / or a recess, and has a filling space between one end of the plastic shell and the metal shell; the protrusion is located in the plastic shell and between the front end and the rear end of the plastic shell; the extension direction of the protrusion is the same as that of the plastic shell, and a filling cavity with an opening towards the rear end is formed between the protrusion and the inner wall of the plastic shell; the protrusion does not exceed the rear end of the plastic shell, and the length of the protrusion in the direction from the front end to the rear end is greater than or equal to 2 mm; the metal terminal is electrically connected with the cable; the metal terminal and the metal shell are prearranged in the plastic shell, and the cable is electrically connected with the metal terminal; The plastic shell and the cable are subjected to plasma surface treatment by using a plasma treatment device, so as to equalize the surface tension of the plastic shell and the cable; The plastic shell and the cable are subjected to plasma surface treatment by using a plasma treatment device, so as to equalize the surface tension of the plastic shell and the cable; The plastic shell and the cable are subjected to plasma surface treatment by using a plasma treatment device, so as to equalize the surface tension of the plastic shell and the cable; Hot melt adhesive is injected into the cavity, and the hot melt adhesive is solidified to form a sealing fixing member of an integrally formed structure which is at least partially filled in the filling space; wherein, at least part of the sealing fixing member is in contact with the protrusion, and / or at least part of the sealing fixing member fills the recess; the metal shell and the plastic shell form an inseparable structure through the sealing fixing member.

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