Mini Fakra connector

Abstract

The utility model discloses a Mini Fakra connector. The Mini Fakra connector comprises a central pin, a first insulator, a second insulator, an outer conductor and a shell, the first insulator and the second insulator are sequentially sleeved outside the center pin at intervals, the center pin is arranged in the outer conductor, and the shell is sleeved outside the outer conductor; the outer conductor is provided with a first fixing cavity for fixing the first insulator; the first fixing cavity is of a two-section structure which comprises a front section and a rear section and is small in front and large in rear, and the first insulator is inserted into the front section from the rear section of the first fixing cavity in the back-to-front direction. The periphery of the first insulator is provided with a convex rib extending along the front-back direction, and the convex rib is used for abutting against the inner wall of the front section so as to fix the first insulator; the rear end of the convex rib is provided with a circle of flange extending along the circumferential direction of the first insulator. The first fixing cavity is arranged to be in a two-section type, so that the scraping distance between the first insulator and the first fixing cavity can be reduced, and the rear end of the convex rib is provided with the flange, so that the coating of the inner cavity of the outer conductor can be prevented from being scraped by the convex rib to the exposed part of the central needle.

Description

Technical Field

[0001] The present application relates to the technical field of connectors, and in particular to a Mini Fakra connector. Background Art

[0002] Mini Fakra connectors typically consist of a center pin, an insulator, an outer conductor, and a housing. The center pin is positioned within the outer conductor, separated from the outer conductor by an insulator integrally molded onto the center pin. The center pin is typically formed with two insulator sections: one at the front and one at the rear, with a gap between them. The center pin is exposed between the two sections.

[0003] During assembly, the center pin, along with the insulator, is inserted from the back to the front into the outer conductor's cavity. The front insulator is provided with longitudinally extending ribs around its periphery, securing the insulator in the outer conductor's cavity. However, during assembly, the ribs on the front insulator's surface can scrape against the outer conductor's cavity, removing the plating from the cavity. This scraped-off plating can then rub against the exposed center pin at the rear, causing a short circuit between the die-cast component and the center pin. Utility Model Content

[0004] The purpose of this application is to provide a Mini Fakra connector to address the deficiencies of the prior art.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] A Mini Fakra connector includes a center pin, a first insulator, a second insulator, an outer conductor, and a housing; the first insulator and the second insulator are sequentially and spaced apart from each other and sleeved around the center pin; the center pin is disposed in the outer conductor; and the housing is sleeved around the outer conductor.

[0007] The outer conductor has a first fixing cavity for fixing the first insulator; the first fixing cavity is a two-section structure including a front section and a rear section, with the front section smaller and the rear section larger; the first insulator is inserted from the rear section of the first fixing cavity to the front section in a rear-forward direction;

[0008] The outer periphery of the first insulator is provided with a convex rib extending in the front-to-back direction, and the convex rib is used to abut against the inner wall of the front section to fix the first insulator; the rear end of the convex rib is provided with a circle of flange extending along the circumference of the first insulator.

[0009] In some embodiments, the flange is at the same height as the rib.

[0010] In some embodiments, the convex rib is in the shape of a wedge with a lower front and a higher back.

[0011] In some embodiments, the ribs are multiple and are arranged at intervals along the circumference of the first insulator.

[0012] In some embodiments, the length of the front segment is 0.7-2.5 mm; the length of the rear segment is 2.5-4.2 mm.

[0013] In some embodiments, the diameter of the rear section is greater than the maximum outer diameter of the first insulator, and the diameter of the front section is less than or equal to the maximum outer diameter of the first insulator.

[0014] In some embodiments, a guide section is provided between the front section and the rear section, and the guide section is trumpet-shaped to transition the front section to the rear section.

[0015] In some embodiments, the front end of the outer conductor is provided with an insertion cavity, and the rear end of the outer conductor is provided with a second fixed cavity; the insertion cavity, the first fixed cavity and the second fixed cavity are connected in sequence; the second insulator is inserted in the second fixed cavity.

[0016] In some embodiments, the second insulator includes a large diameter portion and a small diameter portion, the large diameter portion is inserted into the second fixing cavity, and the small diameter portion is inserted at the rear end of the first fixing cavity.

[0017] In some embodiments, the front end of the center pin is a contact end extending into the plug-in cavity, and the rear end of the center pin is a welding end extending from the second fixing cavity.

[0018] The benefits of this application are:

[0019] In this application, the first fixed cavity is designed as a two-stage structure, with a smaller diameter at the front and a larger diameter at the rear. This prevents the first insulator from scraping against the rear section when inserted into the first fixed cavity, reducing the scraping distance between the first insulator and the first fixed cavity and preventing the plating from being scraped off the inner wall of the first fixed cavity. Furthermore, a flange is provided at the rear end of the ribs on the first insulator to block the scraped plating, preventing it from leaking through the gaps between the ribs and contacting the exposed portion of the center pin at the rear end, thus preventing a short circuit between the outer conductor and the center pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described below are only some embodiments. A person skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the Mini Fakra connector in an embodiment of the present application;

[0022] Figure 2This is a schematic diagram of the exploded structure of the Mini Fakra connector in an embodiment of the present application;

[0023] Figure 3 This is a schematic cross-sectional view of the Mini Fakra connector in an embodiment of the present application;

[0024] Figure 4 Schematic diagram of the cross-sectional structure of the assembly of the center needle, the first insulator, the second insulator and the outer conductor in the embodiment of the present application;

[0025] Figure 5 Schematic diagram of the cross-sectional structure of the outer conductor in the embodiment of the present application;

[0026] Figure 6 for Figure 5 A schematic structural diagram of the structure shown from another perspective;

[0027] Figure 7 This is a schematic diagram of the structure of the center pin, the first insulator, and the second insulator assembled in an embodiment of the present application;

[0028] Figure 8 This is a schematic structural diagram of the first insulator in an embodiment of the present application;

[0029] Figure 9 for Figure 8 Schematic diagram of the structure shown from another perspective.

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0031] 10. Mini Fakra connector;

[0032] 100, center pin; 100a, exposed part; 100b, contact end; 100c, welding end;

[0033] 200, first insulator; 210, rib; 220, flange;

[0034] 300, second insulator; 310, large diameter portion; 320, small diameter portion;

[0035] 400, outer conductor; 410, plug-in cavity; 420, first fixing cavity; 421, front section; 422, rear section; 423, guide section; 430, second fixing cavity; 440, positioning post;

[0036] 500. Shell. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0038] The embodiment of the present application provides a Mini Fakra connector. Figure 1 and Figure 2 As shown, the Mini Fakra connector 10 includes a center pin 100, a first insulator 200, a second insulator 300, an outer conductor 400 and a housing 500. Figure 5 As shown, the first insulator 200 and the second insulator 300 are sequentially and spaced apart from each other and are sleeved on the outside of the center pin 100. Figure 7 The first insulator 200 and the second insulator 300 can be integrally molded on the outside of the center pin 100 by injection molding, so that the first insulator 200, the second insulator 300 and the center pin 100 form an integral part. Figure 1 and Figure 3 As shown, the center needle 100 is disposed in the outer conductor 400 , and the outer shell 500 is sleeved outside the outer conductor 400 .

[0039] like Figure 5 As shown, the outer conductor 400 has an inserting cavity 410, a first fixed cavity 420, and a second fixed cavity 430. The inserting cavity 410 is arranged at the front end of the outer conductor 400, and the second fixed cavity 430 is arranged at the rear end of the outer conductor 400. The inserting cavity 410, the first fixed cavity 420, and the second fixed cavity 430 are connected in sequence from front to back. The front-to-back direction is the Y direction shown in the figure. Figure 4 As shown, the first insulator 200 is inserted into the first fixing cavity 420, and the second insulator 300 is inserted into the second fixing cavity 430. During assembly, the integrated center pin 100, the first insulator 200, and the second insulator 300 are inserted forward from the rear end of the outer conductor 400.

[0040] In the embodiment of this application, Figure 5 and Figure 6 As shown, the first fixing cavity 420 is a two-section structure with a small front and a large rear, including a front section 421 and a rear section 422. Figure 4The first insulator 200 is inserted from the rear section 422 of the first fixed cavity 420 into the front section 421 in a backward-forward direction. Since the rear section 422 has a larger diameter, the first insulator 200 will not scrape against the rear section 422, thereby reducing the scraping distance between the first insulator 200 and the first fixed cavity 420 and preventing the first insulator 200 from scraping off the coating on the inner wall of the first fixed cavity 420. Figure 4 If the plating layer is scraped off, it will contact the exposed portion 100 a of the center pin 100 , causing a short circuit between the outer conductor 400 and the center pin 100 .

[0041] like Figure 8 As shown, the outer periphery of the first insulator 200 is provided with a rib 210 extending in the front-to-back direction (Y direction). The rib 210 is used to abut against the inner wall of the front section 421 of the first fixing cavity 420, thereby fixing the first insulator 200. In other words, the rib 210 is used to press against the inner wall of the front section 421 of the first fixing cavity 420, thereby fixing the first insulator 200 in the front section 421 of the first fixing cavity 420.

[0042] In the embodiment of this application, Figure 8 and Figure 9 As shown, a flange 220 extending along the circumference of the first insulator 200 is provided at the rear end of the rib 210. The flange 220 is similar to a retaining ring blocking the rear end of the rib 210. When the first insulator 200 scrapes the inner wall of the first fixed cavity 420, the rib 210 scrapes against the inner wall of the first fixed cavity 420, scraping off the coating on the inner wall. The scraped coating, i.e., the metal wire, will leak backwards from the gaps between the ribs 210. Figure 4 When the metal wire contacts the exposed portion 100a of the center pin 100, a short circuit occurs between the outer conductor 400 and the center pin 100. In this embodiment, a flange 220 is provided at the rear end of the rib 210 to block any scraped-off plating, preventing it from contacting the center pin 100 and causing a short circuit. This improves the quality and performance stability of the Mini Fakra connector 10 of this embodiment.

[0043] like Figure 9 As mentioned above, the flange 220 is at the same height as the rib 210. That is, the flange 220 is flush with the top of the rib 210, so that the flange 220, like the rib 210, is pressed tightly against the inner wall of the front section 421 of the first fixing cavity 420. In this way, the flange 220 can completely block the scraped-off coating, preventing the coating from leaking to the rear and contacting the exposed portion 100a of the rear center needle 100.

[0044] like Figure 8 and Figure 9As shown, there are multiple ribs 210, which are spaced apart along the circumference of the first insulator 200. Evenly arranging multiple ribs 210 around the first insulator 200 is conducive to fixing the first insulator 200 more tightly.

[0045] Continue to refer Figure 8 and Figure 9 In one embodiment, the rib 210 is in a wedge shape with a lower front and a higher back. Thus, an inclined guide surface is formed at the front end of the rib 210 , which facilitates the insertion of the first insulator 200 into the first fixing cavity 420 .

[0046] As mentioned above, reference Figure 6 In the embodiment of the present application, the first fixed cavity 420 is set as a two-stage type with a small front and a large back. Figure 6 , the length H1 of the front section 421 of the first fixed cavity 420 is 0.7-2.5 mm, and the length H2 of the rear section 422 of the first fixed cavity 420 is 2.5-4.2 mm. Preferably, the length H1 of the front section 421 of the first fixed cavity 420 is 1.4-1.6 mm, and the length H2 of the rear section 422 of the first fixed cavity 420 is 3.4-3.6 mm. Setting the length H2 of the rear section 422 of the first fixed cavity 420 to about 3 mm can reduce the scraping distance by about 3 mm, thereby avoiding scraping off the plating to produce metal wires and causing a short circuit between the outer conductor 400 and the center needle 100. At the same time, the front section 421 of the first fixed cavity 420 maintains a length of about 2 mm, which can ensure that the first insulator 200 is fixed and not loose.

[0047] refer to Figure 6 The diameter D1 of the rear section 422 of the first fixing cavity 420 is greater than the maximum outer diameter of the first insulator 200, allowing the first insulator 200 to pass smoothly through the rear section 422 of the first fixing cavity 420 without scratching the rear section 422. The diameter D2 of the front section 421 of the first fixing cavity 420 is less than or equal to the maximum outer diameter of the first insulator 200, allowing the first insulator 200 to be firmly clamped in the front section 421. The maximum outer diameter of the first insulator 200 refers to the outer diameter formed by the highest points of the rib 210 and the flange 220 on the first insulator 200.

[0048] like Figure 5 and Figure 6As shown, in one embodiment, the first fixed cavity 420 of the outer conductor 400 further includes a guide section 423, which is disposed between the front section 421 and the rear section 422 of the first fixed cavity 420. The guide section 423 is trumpet-shaped, with a small front end and a large rear end. That is, the diameter of the guide section 423 gradually increases from front to rear, thereby transitioning the front section 421 of the first fixed cavity 420, which has a smaller diameter, to the rear section 422 of the first fixed cavity 420, which has a larger diameter. Simultaneously, the guide section 423 can guide the installation of the first insulator 200, guiding the first insulator 200 into the front section 421 of the first fixed cavity 420.

[0049] In one embodiment, if Figure 4 As shown, the second insulator 300 includes a large diameter portion 310 and a small diameter portion 320, wherein the small diameter portion 320 is located in front and the large diameter portion 310 is located in the back, and the diameter of the small diameter portion 320 is smaller than that of the large diameter portion 310. Figure 4 As shown, the large diameter portion 310 of the second insulator 300 is inserted into the second fixing cavity 430, and the small diameter portion 320 is inserted at the rear end of the first fixing cavity 420. It is understood that the diameter of the second fixing cavity 430 is larger than the diameter of the first fixing cavity 420, so that the large diameter portion 310 of the second insulator 300 is retained in the second fixing cavity 430, while the small diameter portion 320 can extend into the first fixing cavity 420, thereby fixing the second insulator 300 and limiting its axial position.

[0050] like Figure 3 As shown, the front end of the center pin 100 extends into the insertion cavity 410 at the front end of the first insulator 200. The front end of the center pin 100 is the contact end 100b, which is used to contact the docking connector to achieve signal transmission. Figure 4 As shown, the rear end of the center pin 100 extends out from the second fixing cavity 430 at the rear end of the first insulator 200 , and the rear end of the center pin 100 is a welding end 100 c for welding to a circuit board.

[0051] like Figure 5 As shown, the rear end of the outer conductor 400 is further provided with a positioning post 440 extending backward, and the positioning post 440 is used for positioning with the circuit board.

[0052] The various technical features in the above-described embodiments can be arbitrarily combined. To make the description concise, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments merely represent implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A Mini Fakra connector, characterized in that: The device comprises a center needle, a first insulator, a second insulator, an outer conductor and a shell; the first insulator and the second insulator are sequentially and spaced apart and sleeved outside the center needle, the center needle is arranged in the outer conductor, and the shell is sleeved outside the outer conductor; The outer conductor has a first fixing cavity for fixing the first insulator; the first fixing cavity is a two-section structure including a front section and a rear section, with the front section smaller and the rear section larger; the first insulator is inserted from the rear section of the first fixing cavity to the front section in a rear-forward direction; The outer periphery of the first insulator is provided with a convex rib extending in the front-to-back direction, and the convex rib is used to abut against the inner wall of the front section to fix the first insulator; the rear end of the convex rib is provided with a circle of flange extending along the circumference of the first insulator.

2. The Mini Fakra connector according to claim 1, characterized in that: The flange is at the same height as the rib.

3. The Mini Fakra connector according to claim 1, characterized in that The shape of the convex rib is a wedge shape with a lower front and a higher back.

4. The Mini Fakra connector according to claim 1, characterized in that There are a plurality of convex ribs, which are arranged at intervals along the circumference of the first insulator.

5. The Mini Fakra connector according to claim 1, characterized in that: The length of the front section is 0.7-2.5 mm; the length of the rear section is 2.5-4.2 mm.

6. The Mini Fakra connector according to claim 1, characterized in that The diameter of the rear section is greater than the maximum outer diameter of the first insulator, and the diameter of the front section is less than or equal to the maximum outer diameter of the first insulator.

7. The Mini Fakra connector according to claim 1, characterized in that A guide section is provided between the front section and the rear section, and the guide section is trumpet-shaped to transition the front section to the rear section.

8. The Mini Fakra connector according to claim 1, characterized in that: The front end of the outer conductor is provided with an inserting cavity, and the rear end of the outer conductor is provided with a second fixing cavity; the inserting cavity, the first fixing cavity and the second fixing cavity are connected in sequence; the second insulator is inserted in the second fixing cavity.

9. The Mini Fakra connector according to claim 8, characterized in that: The second insulator includes a large-diameter portion and a small-diameter portion, the large-diameter portion is inserted into the second fixing cavity, and the small-diameter portion is inserted at the rear end of the first fixing cavity.

10. The Mini Fakra connector according to claim 8, characterized in that The front end of the center needle is a contact end extending into the plug-in cavity, and the rear end of the center needle is a welding end extending from the second fixing cavity.

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