Miniature coaxial socket and coaxial connector assembly

Abstract

A miniature coaxial socket comprises an outer conductor, a central conductor and an insulating body for fixedly holding the outer conductor and the central conductor into a whole, the outer conductor comprises a cylindrical part, extension parts formed by bending and extending the lower ends of the two transverse sides of the cylindrical part, and forming spaces formed in the two longitudinal sides of the cylindrical part, the central conductor comprises a cylindrical contact part located at the axis position of the cylindrical part, a holding part formed at the bottom end of the cylindrical contact part, and a weld leg extending outwards from one side of the holding part to the outside of the cylindrical part, and the insulating body comprises a base part located in the cylindrical part and a drawing part filled in the forming space. The surface of the extension part is pressed to be thin to form a filling groove communicated with the forming space, and the extraction part comprises a filling part filled into the filling groove. The utility model further discloses a coaxial connector assembly.

Description

Technical Field

[0001] The present application relates to the field of electrical connectors, and in particular to a miniature coaxial socket and a coaxial connector assembly. Background Art

[0002] Patent No. 201320345758.X of the People's Republic of China discloses an ultra-micro RF connector, comprising an outer conductor, a center conductor, and an insulating body that holds the outer conductor and the center conductor as one body, the outer conductor comprising a cylindrical portion, and an extension portion formed by vertically bending from the bottom end of the cylindrical portion, the center conductor comprising a columnar contact portion located at the axial center position of the cylindrical portion, a holding portion formed at the bottom end of the columnar contact portion, and a solder foot extending outward from one side of the holding portion to the outside of the cylindrical portion, the insulating body comprising a base located within the cylindrical portion of the outer conductor, and a pull-out portion extending outward from the base outside the cylindrical portion with the same thickness as the extension portion of the outer conductor, a notch being provided at the bottom of the cylindrical portion above the solder foot of the center conductor, and the insulating body being filled with a step portion at the notch of the cylindrical portion when being integrally formed with the outer conductor and the center conductor.

[0003] The overall height of the above-mentioned ultra-micro RF connector can be achieved at 0.5mm, but the new technical requirements put forward the requirement that the RF connector assembly as a whole should reach a height of 0.7mm, and the height requirement for the ultra-micro RF socket should reach 0.38mm. When the above structure is used to achieve this technical performance, there will be a problem that the insulating body cannot be tightly combined with the center conductor and the outer conductor. Design changes are needed to improve the holding force of the center conductor and the outer shell through a thinner insulating body. Utility Model Content

[0004] In view of this, it is necessary to provide an ultra-low-profile micro coaxial socket and a coaxial connector socket.

[0005] In order to solve the above technical problems, the present application provides a miniature coaxial socket, comprising an outer conductor, a center conductor, and an insulating body that holds the outer conductor and the center conductor as one body, the outer conductor comprising a cylindrical portion, an extension portion formed by bending and extending from the lower ends of the cylindrical portion on both lateral sides, and a molding space opened on both longitudinal sides of the cylindrical portion, the center conductor comprising a columnar contact portion located at the axial center position of the cylindrical portion, a holding portion formed at the bottom end of the columnar contact portion, and a solder foot extending outward from one side of the holding portion to the outside of the cylindrical portion, the insulating body comprising a base located in the cylindrical portion and a withdrawal portion filled in the molding space, the surface of the extension portion being thinned to form a filling groove connected to the molding space, and the withdrawal portion comprising a filling portion filled in the filling groove.

[0006] Preferably, the filling groove is located on both lateral sides of the molding space, and the filling groove includes an open end facing and connected to the molding space and a closed end opposite to the open end, and the minimum width of the open end is smaller than the maximum width of the closed end.

[0007] Preferably, the inner side of the filling groove extends from the molding space along the arc surface of the cylindrical portion, the outer side of the filling groove is arranged opposite to the inner side of the filling groove, and the outer side of the filling groove is arranged as an inclined surface toward the molding space.

[0008] Preferably, the thickness of the withdrawal portion is equal to the thickness of the outer conductor, that is, the upper and lower surfaces of the withdrawal portion are flush with the upper surface of the extension portion, and the upper surface of the filling portion is flush with the upper surface of the extension portion.

[0009] Preferably, a notch is provided at the bottom of the cylindrical portion above the welding foot of the center conductor. When the insulating body is integrally formed with the outer conductor and the center conductor, a step portion is filled in the notch of the cylindrical portion. The base and the pull-out portion are connected as a whole through the area where the step portion is located, and the filling portion and the pull-out portion are connected as a whole.

[0010] Preferably, an upwardly inclined wall is stamped and formed on the outer periphery of the holding portion of the central conductor, the base of the insulating body wraps the inclined wall, and the base covers the upper surface of the holding portion.

[0011] Preferably, a terminal groove is formed on the ground on either longitudinal side of the insulating body, the welding foot of the central conductor is formed in the terminal groove, and the bottom surface of the welding foot is flush with the bottom surface of the insulating body.

[0012] Preferably, the thickness of the extension portion of the outer conductor is 0.1 mm, the depth of the filling groove is 0.05 mm, the thickness of the welding foot of the central conductor is 0.05 mm, and the thickness of the insulating body is 0.1 mm.

[0013] In order to solve the above technical problems, the present application also provides a coaxial connector assembly, including the aforementioned micro coaxial socket and a micro coaxial plug that is mated with the micro coaxial socket.

[0014] Preferably, the micro coaxial plug includes a plug body, a plug terminal assembly assembled in the plug body and a plug shell wrapping the plug body; the plug body includes a cylindrical body, a fixed head formed at the upper end of the cylindrical body, a shoulder extending radially outward from one side of the cylindrical body, and a mounting groove opened on the upper side of the shoulder and connected to the cylindrical body; the plug terminal assembly includes a plug terminal and a coaxial line riveted and conducted by the plug terminal, the plug terminal includes a conducting portion extending into the cylindrical body, a terminal body bent from the top of the conducting portion and extending into the mounting groove, and a cable riveting portion formed at the end of the terminal body; the cylindrical body is inserted into the cylindrical portion, the conducting portion is connected to the columnar contact portion, and the plug shell portion is inserted into the outside of the cylindrical portion and conducted.

[0015] The micro coaxial socket and coaxial connector assembly of the present application forms a filling groove connected to the molding space by thinning the extension portion of the outer conductor, so that the extraction portion of the insulating body extends into the filling groove to press the outer conductor and maintain relatively good bonding force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A three-dimensional assembly diagram of the micro coaxial socket of this application;

[0018] Figure 2 This is a three-dimensional exploded view of the micro coaxial socket of this application;

[0019] Figure 3 This is a three-dimensional exploded view of the micro coaxial socket of the present application from another angle;

[0020] Figure 4 For the Figure 1 A cross-sectional view taken along the dashed line AA is shown;

[0021] Figure 5 For the Figure 1 A cross-sectional view taken along the dashed line BB shown;

[0022] Figure 6 This is a perspective exploded view of the coaxial plug of the coaxial connector assembly of the present application;

[0023] Figure 7 A cross-sectional view of a coaxial connector assembly according to the present invention.

[0024] Description of Reference Numerals

[0025] Insulating body 10; base 11; extraction portion 12; filling portion 13; terminal slot 14; step portion 15; outer conductor 20; cylindrical portion 21; snap-fit ​​slot 211; extension portion 22; molding space 23; filling slot 24; open end 241; closed end 242; notch 25; center conductor 30; columnar contact portion 31; retaining portion 32; solder foot 33; inclined wall 35; plug body 40; cylindrical body 412; fixing head 411; shoulder 413; mounting slot 414; plug housing 50; plug terminal assembly 70; plug terminal 71; conducting portion 711; cable rivet portion 713; terminal body 712; coaxial line 72. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of this application more clear, the technical solutions of this application will be described clearly and completely below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of them.

[0027] See also Figures 1 to 7 As shown, the coaxial connector assembly of the present application includes a micro coaxial receptacle A (hereinafter referred to as the receptacle) and a micro coaxial plug B (hereinafter referred to as the plug) that mates with the micro coaxial receptacle A. When the receptacle A and the plug B are engaged, the distance between the bottom surface of the receptacle A and the top surface of the plug B is 0.7 mm, and the height of the receptacle A is 0.38 mm.

[0028] Please refer to Figures 1 to 5 As shown, the socket A described in the present application includes an outer conductor 20 , a center conductor 30 , and an insulating body 10 that holds the outer conductor 20 and the center conductor 30 as a whole.

[0029] The outer conductor 20 comprises a cylindrical portion 21, a pair of extensions 22 extending vertically outward from the left and right sides of the bottom of the cylindrical portion 21, and forming spaces 23 formed on both longitudinal sides of the cylindrical portion 21. Notches 25 are also defined at the bottom of both longitudinal ends of the cylindrical portion 21, connecting the interior of the cylindrical portion 21 with the forming space 23. The extensions 22 extend longitudinally to both sides of the forming space 23. The surface of the extension 22, located near the forming space 23, is pressed downward to form a filling groove 24 that connects to the forming space 23. The filling groove 24 includes an open end 241 that connects to the forming space 23 and a closed end 242 opposite the open end 241. The inner side of the open end 241 extends along the edge of the cylindrical portion 21 to form an arc path, and the outer side of the open end 241 extends toward the molding space 23 in an inclined path. The inclined extension path of the outer side of the open end 241 can reduce the area of ​​the longitudinal outer end surface of the extension portion 22 that needs to be thinned and make the minimum opening of the open end 241 smaller than the width of the widest part of the closed end 242.

[0030] The center conductor 30 includes a columnar contact portion 31 extending from the axis of the cylindrical portion 21 of the outer conductor 20, a retaining portion 32 formed at the bottom end of the columnar contact portion 31, and a weld leg 33 extending radially outward from one side of the retaining portion 32. The bottom of the retaining portion 32 is crushed to form a crushed portion 35 that increases the plastic's holding force. The periphery of the retaining portion 32 is processed to form an inclined wall 35 that tilts upward. The center conductor 30 is made of the same material, specifically, a copper plate that is stretched and stamped. The columnar contact portion 31 is stretched and has a cavity formed in the center.

[0031] The insulating body 10 includes a base 11 positioned within the cylindrical portion 21 of the outer conductor 20, a drawout portion 12 extending outward from the base 11, and a filling portion 13 extending laterally from both sides of the drawout portion 12 and filling the filling slot 24. The thickness of the base 11 is consistent with that of the drawout portion 12, which in turn is consistent with that of the extension portion 22 of the outer conductor 20. The bottoms of the base 11 and drawout portion 12 on either longitudinal side of the insulating body 10 form terminal slots 14 for the solder legs 33 of the center conductor 30 to extend out of the cylindrical portion 21 of the outer conductor 20. The thickness of the center conductor 30 is less than that of the outer conductor 20 and is no greater than three-quarters of the thickness of the outer conductor 20. The bottom surface of the center conductor 30 is flush with the bottom surface of the extension portion 22 and the bottom surface of the insulating body 10. The upper surface of the base 11 is higher than the upper surface of the retaining portion 32 of the center conductor 30, and the upper surface of the retaining portion 32 is embedded in the base 11. The base 11 also wraps around the outer periphery of the inclined wall 35 at the periphery of the retaining portion 32 to increase the retaining force of the insulating body 10 on the center conductor 30. The filling portion 13 is integrally connected to the insulating body 10 and covers the filling groove 24 of the extension portion 22 of the outer conductor 20 to increase the retaining force of the outer conductor 20.

[0032] The notch 25 at the bottom of the cylindrical portion 21 of the outer conductor 20 is located above the extension direction of the solder leg 33 of the center conductor 30. When the outer conductor 20, center conductor 30, and insulator body 10 are integrally formed, the insulator body 10 forms a step 15 of a certain thickness within the notch 25 of the outer conductor 20. The width of the step 15 is consistent with the width of the bottom of the cylindrical portion 21 of the outer conductor 20. The step 15 is located at the edge of the base 11 and is thicker than the thickness of the insulator body 10. The width of the notch 25 is greater than the width of the solder leg 33 of the center conductor 30.

[0033] The outer circumference of the cylindrical portion 21 is provided with a circle of locking grooves 211 for mating with the plug B.

[0034] In one embodiment, to achieve technical performance goals, the thickness of the insulating body 10 in this application is only 0.1 mm, the thickness of the outer conductor 20 is 0.1 mm, and the thickness of the center conductor 30 is 0.05 mm. The filling groove 24 on the extension 22 of the outer conductor 20 is thinned downward to a depth of 0.05 mm, that is, the extension 22 is thinned to half its original thickness.

[0035] The cylindrical portion 21 of the outer conductor 20 is provided with a notch 25 above the extension direction of the solder leg 33 of the center conductor 30, and the notch 25 is filled with a stepped portion 15 formed of plastic. In this way, the thickness of the insulation layer between the outer conductor 20 and the center conductor 30 is increased. As the size of the product becomes increasingly smaller, the manufacturing precision of the product is reduced, thereby reducing the manufacturing difficulty and cost of the product.

[0036] The micro coaxial socket A of the present application forms a filling groove 24 connected to the molding space 23 by thinning the extension portion 22 of the outer conductor 20, so that the extraction portion 12 of the insulating body 10 extends into the filling groove 24 to press the outer conductor 20 and maintain relatively good bonding force.

[0037] Please continue reading Figure 6 、 Figure 7 As shown, the micro coaxial plug B includes a plug body 40, a plug terminal assembly 70 assembled within the plug body 40, and a plug housing 50 that encases the plug body 40. The plug body 40 includes a cylindrical body 412, a fixed head 411 formed at the upper end of the cylindrical body 412, a shoulder 413 extending radially outward from one side of the cylindrical body 412, and a mounting groove 414 formed above the shoulder 413 and connected to the cylindrical body 412. The plug terminal assembly 70 includes a plug terminal 71 and a coaxial cable 72 riveted to the plug terminal 71. The plug terminal 71 includes a conductive portion 711 extending into the cylindrical body 412, a terminal body 713 bent from the top of the conductive portion 711 and extending into the mounting groove 414, and a cable rivet portion 712 formed at the end of the terminal body 713. The plug body 40 further includes an insulating sheet 42 covering the upper side of the plug terminal 71. The insulating sheet 42 can be a separate sheet structure or a sheet integrally formed with the plug body 40. Specifically, the insulating sheet 42 is integrally formed on the other side of the fixed head 411 relative to the shoulder 413. After the plug terminal assembly 70 is assembled, the insulating sheet 42 is bent inward and covers the upper side of the plug terminal 71. The plug housing 50 entirely encloses the plug body 40.

[0038] When plug B is plugged into socket A, the cylindrical body 412 of the plug body 40 is inserted into the cylindrical portion 21 of socket A, the conductive portion 711 is conductively connected to the columnar contact portion 31, and the plug housing 50 is partially inserted into the outer side of the cylindrical portion 21, thereby achieving electrical connection. The structure of plug B is largely conventional and will not be further described here.

[0039] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0040] The above embodiments merely represent preferred implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A miniature coaxial receptacle comprising an outer conductor, a center conductor, and an insulating body integrally holding the outer and center conductors. The outer conductor comprises a cylindrical portion, an extension portion bent and extending from the lower ends of the cylindrical portion on both sides thereof, and a molding space defined on both sides thereof. The center conductor comprises a columnar contact portion located at the axial center of the cylindrical portion, a holding portion formed at the bottom end of the columnar contact portion, and a solder leg extending outward from one side of the holding portion to the outside of the cylindrical portion. The insulating body comprises a base portion located within the cylindrical portion and a draw-out portion filled in the molding space. The invention is characterized in that: A filling groove communicating with the molding space is formed on a surface of the extending portion by being pressed thinly, and the withdrawing portion includes a filling portion filled into the filling groove.

2. The miniature coaxial socket according to claim 1, wherein: The filling slot is located on both lateral sides of the molding space. The filling slot includes an open end facing and communicating with the molding space and a closed end opposite to the open end. The minimum width of the open end is smaller than the maximum width of the closed end.

3. The miniature coaxial socket according to claim 2, wherein: The inner side of the filling groove extends from the molding space along the arc surface of the cylindrical portion, the outer side of the filling groove is arranged opposite to the inner side of the filling groove, and the outer side of the filling groove is arranged as an inclined surface toward the molding space.

4. The miniature coaxial socket according to claim 3, wherein: The thickness of the withdrawal portion is equal to the thickness of the outer conductor, that is, the upper and lower surfaces of the withdrawal portion are flush with the upper surface of the extension portion, and the upper surface of the filling portion is flush with the upper surface of the extension portion.

5. The miniature coaxial socket according to claim 4, wherein: A notch is provided at the bottom of the cylindrical portion above the solder foot of the center conductor. When the insulating body is integrally formed with the outer conductor and the center conductor, a step portion is filled at the notch of the cylindrical portion. The base and the pull-out portion are connected as a whole through the area where the step portion is located, and the filling portion and the pull-out portion are connected as a whole.

6. The miniature coaxial socket according to claim 5, wherein: An upwardly inclined wall is formed by punching the outer periphery of the holding portion of the central conductor. The base of the insulating body wraps the inclined wall inside, and the base covers the upper surface of the holding portion.

7. The miniature coaxial socket according to claim 6, wherein: A terminal groove is formed on the ground at either longitudinal side of the insulating body. The welding foot of the central conductor is formed in the terminal groove, and the bottom surface of the welding foot is flush with the bottom surface of the insulating body.

8. The miniature coaxial socket according to claim 7, wherein: The thickness of the extension portion of the outer conductor is 0.1 mm, the depth of the filling groove is 0.05 mm, the thickness of the welding foot of the central conductor is 0.05 mm, and the thickness of the insulating body is 0.1 mm.

9. A coaxial connector assembly, characterized in that: The invention comprises the micro coaxial socket according to any one of claims 1 to 8 and a micro coaxial plug mated with the micro coaxial socket.

10. The coaxial connector assembly according to claim 9, wherein: The micro coaxial plug includes a plug body, a plug terminal assembly assembled in the plug body and a plug shell wrapping the plug body; the plug body includes a cylindrical body, a fixed head formed at the upper end of the cylindrical body, a shoulder extending radially outward from one side of the cylindrical body, and a mounting groove opened on the upper side of the shoulder and connected to the cylindrical body; the plug terminal assembly includes a plug terminal and a coaxial line riveted and conducted by the plug terminal, the plug terminal includes a conducting portion extending into the cylindrical body, a terminal body bent from the top of the conducting portion and extending into the mounting groove, and a cable riveting portion formed at the end of the terminal body; the cylindrical body is inserted into the cylindrical portion, the conducting portion is conductively connected to the columnar contact portion, and the plug shell portion is inserted into the outside of the cylindrical portion and is conductive.

Images