Waterproof SMB connector

Abstract

The utility model discloses a waterproof SMB connector. The SMB connector comprises a metal shell, a first sealing ring, an inner terminal, a cable, a rear plastic shell and an interface shell, the front end of a first shaft hole of a transverse section of the metal shell is provided with an inserting groove, a shaft shoulder is formed below a first annular groove in the outer wall of a vertical section, a first sealing ring is sleeved with the first annular groove in an interference mode and attached to the shaft shoulder, an inner terminal shaft sleeve is connected to the first shaft hole, a cable shaft sleeve is connected to a second shaft hole, and the upper end of the cable shaft sleeve is electrically connected with the rear end of an inner terminal. The rear plastic shell is integrally encapsulated and injection-molded outside the rear end of the transverse section, the vertical section and the first sealing ring; the rear end of the interface shell is inserted into the inserting groove in an interference mode. An annular protrusion on the inner wall of a central shaft hole of the interface shell is in clearance shaft sleeve connection with a reed. The utility model has the advantages of good sealing performance, high waterproofness, long product service life, stable interworking connection structure, good line contact and stable signal.

Description

Technical Field

[0001] The utility model relates to the field of electrical connection, in particular to a waterproof SMB connector. Background Art

[0002] With the national policy support for new energy, electric vehicles are becoming more and more popular. Car panoramic cameras often use SMB connectors to connect RF circuit signals, which have the following defects: First, SMB connectors need to have good waterproof performance, but the current SMB connectors have poor sealing performance, and water easily seeps into the connector in humid weather, which poses a risk of sealing and the waterproof performance cannot meet the requirements; second, SMB connectors need to have good reliability, but the current SMB connectors have poor matching stability between the interface shell and the contact head, which is prone to shaking of the mating section, affecting the shielding performance, and causing poor line contact and unstable signals. Utility Model Content

[0003] In order to solve one or more of the above problems, the utility model provides a waterproof SMB connector.

[0004] According to one aspect of the utility model, the waterproof SMB connector comprises: a metal housing, a first sealing ring, an inner terminal, a cable, a rear plastic housing and an interface housing;

[0005] The vertical section of the metal shell is integrally connected to the rear end of the transverse section, the front end of the first axial hole of the transverse section is provided with an insertion groove, the upper end of the second axial hole of the vertical section is connected to the first axial hole, and a shaft shoulder is formed below the first annular groove on the outer wall of the vertical section;

[0006] The first sealing ring interferes with the first annular groove of the shaft sleeve and fits the shaft shoulder;

[0007] The inner terminal sleeve is connected to the first axial hole; the cable sleeve is connected to the second axial hole and the upper end thereof is electrically connected to the rear end of the inner terminal;

[0008] The rear plastic shell is integrally encapsulated and injection-molded at the rear end of the transverse section, the vertical section and outside the first sealing ring;

[0009] The rear end of the interface shell is inserted into the insertion groove through interference, and the annular protrusion clearance sleeve on the inner wall of the central shaft hole of the interface shell is connected with the spring sheet.

[0010] In some embodiments, the outer wall of the transverse section is provided with a plurality of inwardly concave second annular grooves, the second ridge of the rear plastic shell is integrally connected to the second annular groove, and the first ridge is integrally connected to the first sealing ring and the first annular groove.

[0011] In some embodiments, a clamping sleeve made of metal is inserted outside the vertical section of the sleeve, the clamping sleeve fits under the shaft shoulder, and the lower end of the rear plastic shell is injection molded to cover the outer wall of the clamping sleeve.

[0012] In some embodiments, the cross section of the protrusion is bilaterally symmetrical, an annular concave curved surface is provided in the middle of the spring leaf, and the concave curved surface and the protrusion are arranged opposite to each other.

[0013] In some embodiments, positioning steps are provided on the left and right end surfaces of the central axis hole, and in a natural state, a gap is set between the left and right end surfaces of the spring and the positioning steps.

[0014] In some embodiments, a circumferential array of transverse elastic columns is provided on the rear end outer wall of the interface housing, and the elastic columns are interference-connected with the insertion slots.

[0015] In some embodiments, an annular groove is provided on the front side of the annular flange at the front end of the transverse section, and a second sealing ring is placed in the annular groove; the dust cover interference sleeve is sleeved on the outer wall of the transverse section and fits the annular groove to press the second sealing ring.

[0016] In some embodiments, the rear end of the first axial hole is connected to a sealing cover plate, the third sealing ring is interference-connected to a rear sealing ring groove of the first axial hole, and the sealing cover plate presses the third sealing ring.

[0017] In some embodiments, a fourth sealing ring placed in the annular groove of the insulator is interference-connected with the first axial hole;

[0018] The shielding layer sleeve of the cable is connected to the second axial hole, and the core wire exposed outside the shielding layer is electrically connected to the inner conductor of the inner terminal.

[0019] In some embodiments, the metal shell is a zinc alloy; and the first sealing ring is a rubber ring.

[0020] The beneficial effects of the waterproof SMB connector are: first, the SMB connector has an integrally injection-molded rear plastic shell for sealing, and a first sealing ring is arranged inside for double sealing, which reduces the risk of air leakage during use, effectively solves the problem of water seeping into the connector in humid weather, has good sealing performance, effectively satisfies the waterproof performance, and effectively improves the product life; second, the protrusion of the interface shell effectively reduces the amount of shaking of the mating ends after mating, and enhances the structural fixation; it can ensure the stable combination of the two, ensure good line contact and good shielding performance, and stable signals; third, the device has a simple structure, does not increase the additional product volume, has low cost, and can ensure good performance for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional schematic diagram of a waterproof SMB connector according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 A schematic cross-sectional view of the waterproof SMB connector shown;

[0023] Figure 3 for Figure 2 A three-dimensional schematic diagram of the metal housing shown (a);

[0024] Figure 4 for Figure 2 A three-dimensional schematic diagram of the metal housing shown (ii);

[0025] Figure 5 for Figure 1 A three-dimensional schematic diagram of the interface shell shown;

[0026] Metal housing 1, vertical section 10, second axial hole 100, first annular groove 101, shaft shoulder 102, transverse section 11, first axial hole 110, insertion groove 111, second annular groove 112, sealing cover plate 12, flange 13, annular groove 131, second sealing ring 14, third sealing ring 15; first sealing ring 2;

[0027] Inner terminal 3, insulator 32, inner conductor 31, fourth sealing ring 33;

[0028] Cable 4, outer jacket 41, shielding layer 42, core wire 43;

[0029] The rear plastic shell 5, the first convex ridge 51, the second convex ridge 52, the clamping hole 53;

[0030] Interface housing 6, central axis hole 60, protrusion 61, positioning step 62, elastic column 63;

[0031] Reed 7; clamping sleeve 8; dust cover 9. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0033] Figures 1 to 5 A waterproof SMB connector according to an embodiment of the present invention is schematically shown. As shown in the figure, the device comprises: a metal housing 1, a first sealing ring 2, an inner terminal 3, a cable 4, a rear plastic housing 5 and an interface housing 6;

[0034] The vertical section 10 of the metal shell 1 is integrally connected to the rear end of the transverse section 11. The front end of the first axial hole 110 of the transverse section 11 is provided with an insertion groove 111. The upper end of the second axial hole 100 of the vertical section 10 is connected to the first axial hole 110. A shaft shoulder 102 is formed below the first annular groove 101 on the outer wall of the vertical section 10.

[0035] The first sealing ring 2 interferes with the first annular groove 101 of the sleeve and fits the shaft shoulder 102;

[0036] The inner terminal 3 sleeve is connected to the first axial hole 110; the cable 4 sleeve is connected to the second axial hole 100 and its upper end is electrically connected to the rear end of the inner terminal 3;

[0037] The rear plastic shell 5 is integrally molded by plastic injection molding at the rear end of the transverse section 11, the vertical section 10 and the outside of the first sealing ring 2;

[0038] The rear end of the interface housing 6 is inserted into the insertion groove 111 with interference fit, and the annular protrusion 61 on the inner wall of the central axis hole 60 of the interface housing 6 is connected to the spring sheet 7 through the clearance sleeve. When the inner terminal 3 and the plug end are mutually connected, the protrusion 61 fixes the left and right movement of the spring sheet 7.

[0039] The beneficial effects of the waterproof SMB connector are as follows: first, the SMB connector has an integrally injection-molded rear plastic shell 5 for sealing, and a first sealing ring 2 is arranged inside for double sealing, which reduces the risk of air leakage during use, effectively solves the problem of water seeping into the connector in humid weather, has good sealing performance, effectively satisfies the waterproof performance, and effectively improves the product life; second, the protrusion 61 of the interface shell 6 effectively reduces the amount of shaking of the mating ends after mating, and enhances the structural fixation; it can ensure the stable combination of the two, ensure good line contact and good shielding performance, and stable signals; third, the device has a simple structure, does not increase the additional product volume, has low cost, and can ensure good performance for a long time.

[0040] Furthermore, the outer wall of the transverse section 11 is provided with a plurality of inwardly concave second annular grooves 112, the second convex ridge 52 of the rear plastic shell 5 is integrally connected to the second annular groove 112, and the first convex ridge 51 is integrally connected to the first sealing ring 2 and the first annular groove 101. The beneficial effect is that the first annular groove 101 and the second annular groove 112 can improve the vertical and transverse connection strength of the two, and will not be separated when subjected to increased load, and at the same time further improve the connection stability of the two.

[0041] Furthermore, the metal clamping sleeve 8 is inserted outside the vertical section 10, the clamping sleeve 8 fits under the shaft shoulder 102, and the lower end of the rear plastic shell 5 is plastic-coated on the outer wall of the clamping sleeve 8. The beneficial effect is that the clamping sleeve 8 effectively supports the rear plastic shell 5, fixes the cable 4, and has high stability in long-term use.

[0042] Furthermore, the cross section of the protrusion 61 is symmetrically arranged, and a ring-shaped concave surface is arranged in the middle of the spring sheet 7. The concave surface and the protrusion 61 are arranged oppositely. When the inner terminal 3 and the mating end are mutually connected, the concave surface deforms outward to fit the protrusion 61. Preferably, the cross section of the protrusion 61 is symmetrically spherical, elliptical and parabolic top. The beneficial effect is that the protrusion 61 can well fix the spring sheet 7 to prevent the poor signal caused by its left-right displacement.

[0043] Preferably, the left and right end faces of the central axis hole 60 are provided with positioning steps 62. In the natural state, the left and right end faces of the spring 7 and the positioning steps 62 are spaced apart. When the inner terminal 3 and the plug end are mutually connected, the spring 7 and the left and right end faces of the positioning steps 62 are in contact with each other. The beneficial effect is that the positioning steps 62 are limited to the limit to ensure product performance.

[0044] Preferably, the rear end outer wall of the interface housing 6 is provided with a circumferential array of transverse elastic columns 63, and the elastic columns 63 are interference-connected with the insertion slots 111. The beneficial effect is that the elastic columns 63 can ensure that the connection between the two is tight and convenient for plugging and unplugging.

[0045] Furthermore, an annular groove 131 is provided on the front side of the annular flange 13 at the front end of the transverse section 11, and a second sealing ring 14 is placed in the annular groove 131; the dust cover 9 is sleeved on the outer wall of the transverse section 11 and fits the annular groove 131 to press the second sealing ring 14. The beneficial effect is that this arrangement can improve the end-to-end sealing performance, prevent water vapor from entering from the front end, and has good waterproof performance.

[0046] Furthermore, the rear end of the first axial hole 110 of the transverse section 11 is also detachably connected with a sealing cover plate 12 through interference; the rear end of the first axial hole 110 is also provided with a rear sealing ring groove, the third sealing ring 15 is interference-connected in the rear sealing ring groove, and the sealing cover plate 12 presses the third sealing ring 15. The beneficial effect is that the sealing cover plate 12 is provided to improve the convenience of connecting the inner terminal 3 and the cable 4, and the third sealing ring 5 is provided to improve the sealing performance and play a good waterproof performance.

[0047] Furthermore, the insulator 32 of the inner terminal 3 is integrally wrapped around the inner conductor 31, and the fourth sealing ring 33 placed in the annular groove on the outer wall of the insulator 32 is interference-connected with the first axial hole 110; the beneficial effect is that the fourth sealing ring 33 can further improve the end-to-end sealing performance, prevent water vapor from entering the interior, and achieve good waterproof performance.

[0048] The end of the outer sheath 41 of the cable 4 is inserted into the clamping hole 53 at the lower end of the rear plastic shell 5, the shielding layer 42 exposed outside the outer sheath 41 is sleeved and connected to the second axial hole 100 of the vertical section 10, and the core wire 43 exposed outside the shielding layer 42 is electrically connected to the inner conductor 31. The beneficial effect is that the arrangement can ensure good fixing performance of the cable 4, and is stable and reliable for a long time.

[0049] Preferably, the metal shell 1 is made of zinc alloy; the first sealing ring 2 is an O-type rubber ring; the beneficial effects are: the zinc alloy material has good structural strength and injection molding bonding, and the O-type rubber ring has high sealing performance.

[0050] Preferably, the rear plastic shell 5 is made of polypropylene or ABS.

[0051] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. Waterproof SMB connector, characterized in that: It comprises: a metal shell (1), a first sealing ring (2), an inner terminal (3), a cable (4), a rear plastic shell (5) and an interface shell (6); The vertical section (10) of the metal shell (1) is integrally connected to the lower rear end of the transverse section (11); a first axial hole (110) of the transverse section (11) is provided with an insertion groove (111) at the front end; the second axial hole (100) of the vertical section (10) is connected to the first axial hole (110) at the upper end; and a shaft shoulder (102) is formed below the first annular groove (101) on the outer wall of the vertical section (10); The first sealing ring (2) is inserted into the first annular groove (101) of the shaft sleeve and fits the shaft shoulder (102); The inner terminal (3) shaft sleeve is connected to the first shaft hole (110); the cable (4) shaft sleeve is connected to the second shaft hole (100) and the upper end thereof is electrically connected to the rear end of the inner terminal (3); The rear plastic shell (5) is integrally molded by plastic overmolding at the rear end of the transverse section (11), the vertical section (10) and outside the first sealing ring (2); The rear end of the interface housing (6) is inserted into the insertion groove (111) through interference fit, and the annular protrusion (61) on the inner wall of the central shaft hole (60) of the interface housing (6) is spaced from the shaft sleeve to connect the spring leaf (7).

2. The waterproof SMB connector according to claim 1, characterized in that: The outer wall of the transverse section (11) is provided with a plurality of inwardly concave second annular grooves (112); the second ridge (52) of the rear plastic shell (5) is integrally formed and connected to the second annular groove (112); and the first ridge (51) is integrally formed and connected to the first sealing ring (2) and the first annular groove (101).

3. The waterproof SMB connector according to claim 1, characterized in that: A clamping sleeve (8) made of metal material is inserted into the outside of the vertical section (10), the clamping sleeve (8) fits under the shaft shoulder (102), and the lower end of the rear plastic shell (5) is injection molded to cover the outer wall of the clamping sleeve (8).

4. The waterproof SMB connector according to claim 1, characterized in that: The cross section of the protrusion (61) is arranged symmetrically on the left and right, and an annular concave curved surface is provided in the middle of the spring leaf (7), and the concave curved surface and the protrusion (61) are arranged opposite to each other.

5. The waterproof SMB connector according to claim 4, characterized in that: The left and right end surfaces of the central axis hole (60) are provided with positioning steps (62), and in a natural state, a gap is provided between the left and right end surfaces of the spring leaf (7) and the positioning steps (62).

6. The waterproof SMB connector according to claim 1, characterized in that: The rear end outer wall of the interface housing (6) is provided with a circumferential array of transverse elastic columns (63), and the elastic columns (63) are interference-connected to the insertion slots (111).

7. The waterproof SMB connector according to claim 1, characterized in that: An annular groove (131) is provided on the front side of the annular flange (13) at the front end of the transverse section (11), and a second sealing ring (14) is placed in the annular groove (131); the dust cover (9) is sleeved on the outer wall of the transverse section (11) and fits the annular groove (131) to press the second sealing ring (14).

8. The waterproof SMB connector according to claim 1, characterized in that: The rear end of the first shaft hole (110) is connected to a sealing cover plate (12), the third sealing ring (15) is interference-connected to a rear sealing ring groove of the first shaft hole (110), and the sealing cover plate (12) presses the third sealing ring (15).

9. The waterproof SMB connector according to claim 1, characterized in that: A fourth sealing ring (33) placed in the annular groove of the insulator (32) is interference-connected to the first axial hole (110); The shielding layer (42) of the cable (4) is sleeved and connected to the second axial hole (100), and the core wire (43) exposed outside the shielding layer (42) is electrically connected to the inner conductor (31) of the inner terminal (3).

10. The waterproof SMB connector according to any one of claims 1 to 9, characterized in that: The metal shell (1) is a zinc alloy; and the first sealing ring (2) is a rubber ring.

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