Multi-channel coaxial connector

Abstract

The invention discloses a multi-channel coaxial connector. The multi-channel coaxial connector comprises a base; each contact unit comprises a signal terminal, a signal pin unit and a grounding piece, a second contact part of each signal terminal is a width step gradual change type elastic sheet type cantilever beam contact piece, and each signal pin unit is a combined piece formed by embedding plastic into the corresponding signal terminal in an injection molding mode. A second contact part of the grounding piece and a second contact part of the signal terminal are arranged in parallel, form a tail contact part for power transmission and are of a three-section parallel side-by-side structure of'ground, signal and ground '; and the at least two separators are arranged in the base and are used for separating the signal terminals of the contact units from the grounding sheets. The multi-channel coaxial connector is high in integration level, small in size, light and thin, the SI performance under high frequency is met, and the outer conductor of the coaxial connector can be used for conducting current setting.

Description

Technical Field

[0001] The invention belongs to the technical field of connectors, and in particular relates to a multi-channel coaxial connector. Background Art

[0002] Coaxial connectors, such as RF coaxial connectors, are commonly used to connect coaxial cables to achieve electrical / signal transmission in communications or electronic devices.

[0003] Most conventional coaxial connectors have single-channel coaxial terminals, and more coaxial terminals are densely arranged. If the coaxial terminals are arranged at a high density, there are cases where the desired electrical characteristics are not satisfied.

[0004] Conventional multi-channel RF connectors are generally not used at high frequencies, or cannot guarantee signal integrity (SI) performance in high-frequency applications. In some applications, multi-channel coaxial connectors are required to meet both SI performance at high frequencies and the outer conductor of the coaxial connector must conduct current. Conventional multi-channel RF connectors cannot meet this requirement.

[0005] With the development of high-speed communication technology, high-speed RF power supply is gradually integrated, miniaturized, and lightweight. The entire link is increasingly inclined to use connectors with high integration, small size, and easy installation and maintenance; however, the multi-channel coaxial connectors on the market are large in size, complex in structure, and have a single function. Summary of the invention

[0006] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0007] Multi-channel coaxial connectors, including:

[0008] Pedestal;

[0009] At least two contact units, the contact units include a signal terminal, a signal needle unit and a grounding sheet, the second contact portion of the signal terminal is a width-stepped spring-type cantilever beam contact piece, the signal needle unit is a composite piece formed by plastic injection molding and embedded in the signal terminal, the second contact portion of the grounding sheet is arranged in parallel with the second contact portion of the signal terminal, the two constitute the tail contact portion of the power transmission and present a "ground, signal, ground" three-section parallel side-by-side structure;

[0010] At least two isolating members are installed in the base and used to separate the signal terminal and the grounding sheet of the contact unit.

[0011] As a preferred embodiment of the above technical solution, at least two of the contact units include a short contact unit and a long contact unit;

[0012] The short contact unit includes a short signal terminal, a short signal needle unit and a short grounding sheet;

[0013] The long contact unit includes a long signal terminal, a long signal needle unit and a long grounding sheet.

[0014] As a preferred embodiment of the above technical solution, the short signal terminal includes a first short contact portion and a second short contact portion, the long signal terminal includes a first long contact portion and a second long contact portion, the first short contact portion and the first long contact portion both include a cage spring type contact, the second short contact portion is a spring-type cantilever beam contact with a stepped width gradient, the three-stage gradient width is W1>W2>W3, and there is a ridge at the bend of W3, the second long contact portion is a spring-type cantilever beam contact with a stepped width gradient, the two-stage gradient width is W4>W5, there is a rectangular boss on W4, and there is a ridge at the bend of W5;

[0015] The short signal pin unit and the long signal pin unit are both plastic injection-molded components respectively embedded in the short signal terminal and the long signal terminal.

[0016] The short grounding piece and the long signal pin unit are respectively arranged in parallel with the second short contact portion and the second long contact portion, and constitute the tail contact portion for power transmission and present a three-section parallel and side-by-side structure of "ground, signal, and ground".

[0017] As a preferred embodiment of the above technical solution, at least two of the isolation members include a fixing plate and a clamping plate, the fixing plate is used to separate the short signal terminal and the short grounding plate in the short contact unit, and the clamping plate is used to separate the long signal terminal and the long grounding plate in the long contact unit.

[0018] As a preferred embodiment of the above technical solution, the fixed plate includes a plurality of fixed plate mounting grooves, and the plurality of fixed plate mounting grooves are evenly arranged in a horizontal direction, each fixed plate mounting groove includes a fixed plate step and two fixed plate mounting holes, and each fixed plate mounting hole separates the short signal terminal and the short grounding plate in the horizontal direction; between every two adjacent fixed plate mounting grooves, there is a short signal terminal and a short grounding plate arranged in the longitudinal direction.

[0019] As a preferred embodiment of the above technical solution, the clamping plate includes a plurality of clamping plate mounting grooves, and the plurality of clamping plate mounting grooves are evenly arranged in a horizontal direction, each clamping plate mounting groove includes a clamping plate step and two clamping plate partitions, and each clamping plate partition separates the long signal terminal and the long grounding plate in the horizontal direction; between every two adjacent clamping plate mounting grooves, there is a long signal terminal and a long grounding plate arranged in the longitudinal direction.

[0020] As a preferred embodiment of the above technical solution, the multi-channel coaxial connector further includes a wiring board;

[0021] The base includes a fixing plate slot, a clamping plate pushing slot and a wiring installation slot. The multi-channel coaxial connector includes a fixing plate and two clamping plates. The fixing plate is installed in the fixing plate slot, and the two clamping plates are installed in the clamping plate pushing slot, so that an installation cavity for the wiring board is formed between a longitudinal slot and the wiring installation slot.

[0022] As a preferred embodiment of the above technical solution, the short contact units and the long contact units are symmetrically arranged in two longitudinal rows of the base, and each forms at least one column in the transverse direction.

[0023] The beneficial effects of the present invention are:

[0024] The multi-channel coaxial connector of the present invention is not only highly integrated, miniaturized, and lightweight, but also meets SI performance at high frequencies and can use the outer conductor of the coaxial connector to conduct current settings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is an exploded view of a multi-channel coaxial connector in an embodiment;

[0026] Figure 2 What is shown is a schematic diagram of the structure of a base in a multi-channel coaxial connector in an embodiment;

[0027] Figure 3 What is shown is a partial enlarged view of the mounting cavity in the multi-channel coaxial connector in the embodiment;

[0028] Figure 4 What is shown is a schematic diagram of the structure of a short contact unit in a multi-channel coaxial connector in an embodiment;

[0029] Figure 5 What is shown is a schematic diagram of the structure of a long contact unit in a multi-channel coaxial connector in an embodiment;

[0030] Figure 6 What is shown is a schematic diagram of the structure of a cage spring type contact in a multi-channel coaxial connector in an embodiment;

[0031] Figure 7 What is shown is a schematic diagram of the structure of a fixing plate in a multi-channel coaxial connector in an embodiment;

[0032] Figure 8 What is shown is a schematic diagram of the structure of a clamping plate in a multi-channel coaxial connector in an embodiment;

[0033] Fig. 9 The figure shows a cross-sectional view of the internal structure of the multi-channel coaxial connector after assembly in the embodiment;

[0034] Fig.10 Shown is a schematic structural diagram of a wiring board in a multi-channel coaxial connector in an embodiment.

[0035] In the figure: 1, base; 11, guide hole; 12, front mounting hole; 13, rear mounting hole; 14, mounting cavity; 15, fixing plate groove; 16, clamping plate pushing groove; 17, wiring mounting groove; 18, clamp edge; 141, outer conductor clamp pushing groove; 142, outer conductor mounting groove; 143, inner conductor mounting hole; 144, inner conductor mounting cavity fixing beam; 2, short contact unit; 21, short signal terminal; 22, short signal pin unit; 23, short grounding plate; 211, first short contact part; 212, second short Contact part; 3. Long contact unit; 31. Long signal terminal; 32. Long signal pin unit; 33. Long grounding plate; 311. First long contact part; 312. Second long contact part; 4. Fixed plate; 41. Fixed plate mounting groove; 42. Fixed plate step; 43. Fixed plate mounting hole; 5. Clamp; 51. Clamp mounting groove; 52. Clamp step; 53. Clamp partition; 54. Clamp mounting hole; 6. Cage spring type contact; 61. Segmented spring; 7. Wiring board; 71. Wiring board pin. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0037] Example

[0038] like Figure 1 As shown, a miniaturized rectangular multi-channel coaxial connector includes: a base 1, a short contact unit 2, a long contact unit 3, a fixing plate 4, and a clamping plate 5. A portion of the short contact unit 2 and the long contact unit 3 are installed in the base 1, and a portion is exposed outside the base 1. The fixing plate 4 and the clamping plate 5 are installed in the base 1 to separate the signal terminal and the grounding plate in the contact unit.

[0039] like Figure 2 , Figure 3 As shown, the base 1 includes: a guide hole 11, a front mounting hole 12, a rear mounting hole 13, a mounting cavity 14, a fixing plate slot 15, a clamping plate pushing slot 16, a wiring board mounting slot 17, and a clamping edge 18;

[0040] The guide holes 11 are arranged on both sides of the lower left and upper right of the end surface of the base 1, and are 360° rotationally symmetrical; the installation cavity 14 is arranged on the end surface of the base 1, evenly arranged up and down, left and right, with consistent spacing up and down, left and right, and 360° rotationally symmetrical; the fixing plate groove 15, the clamping plate pushing groove 16, the wiring board installation groove 17, and the clamping edge 18 are all symmetrical left and right relative to the center line of the base to form a symmetrical part.

[0041] The mounting cavity 14 includes: an outer conductor clamping advancement groove 141, an outer conductor mounting groove 142, an inner conductor mounting hole 143, and an inner conductor mounting cavity fixing beam 144; the outer conductor clamping advancement groove 141 is four-directional and is evenly distributed 360° relative to the single mounting cavity 14; the inner conductor mounting cavity fixing beam 144 is deflected 45° relative to the single mounting cavity 14.

[0042] like Figure 4 , Figure 5 As shown, the short contact unit 2 includes: a short signal terminal 21 , a short signal needle unit 22 , and a short grounding plate 23 .

[0043] The short signal terminal 21 includes: a first short contact portion 211 and a second short contact portion 212; wherein the first short contact portion 211 is a cage spring type contact 6; wherein the second short contact portion 212 is a width step-gradient spring-type cantilever beam contact, and the three-stage gradient width is W1>W2>W3, and there is a ridge at the bend of W3, which is used to limit the impedance between the short signal terminal 21 and the short grounding plate 23; the short signal terminal 21 also includes a first insert matching portion 213, and the first insert matching portion 213 has a first step thickness transition section 214, and has a first semicircular conical small boss 215.

[0044] The short signal pin unit 22 has symmetrical rectangular notches 221 on both sides of the signal terminal; a semicircular long notch 222 at the bottom; a rectangular notch 223, a symmetrical cutout 224, and a long strip convex ridge 225 at the top; and irregular convex ridges 226 and 227 on the left.

[0045] The short grounding piece 23 includes: a first contact portion 231 and a second contact portion 232; wherein the first contact portion 231 is a four-petal cantilever beam contact piece; wherein the second contact portion 232 is an irregular spring-type cantilever beam contact piece; there is a rectangular U-shaped notch 233 on the upper part of the short grounding piece 23, and there are semicircular bosses 234 on the upper tail and the front and rear parts of the left side, and the specifications of the boss on the front part of the left side are smaller than those on the rear part.

[0046] The first short contact portion 211 of the short signal terminal 21 and the first contact portion 231 of the short grounding plate 23 form the head inner outer contact portion of the integral connector inner contact piece signal power transmission; the second short contact portion 212 of the short signal terminal 21 and the second contact portion 232 of the short grounding plate 23 form the tail contact portion of the integral connector inner contact piece signal power transmission, and present a "ground, signal, ground" three-section parallel side-by-side structure;

[0047] The long contact unit 3 includes: a long signal terminal 31 , a long signal needle unit 32 , and a long grounding sheet 33 .

[0048] The long signal terminal 31 includes: a first long contact portion 311 and a second long contact portion 312; wherein the first long contact portion 311 is a cage spring type contact 6; wherein the second long contact portion 312 is a spring-type cantilever beam contact with a stepped width gradient, and the two sections of the gradient width are W4>W5, W4 has a rectangular boss, and W5 has a ridge at the bend, which is used to limit the impedance between the long signal terminal 31 and the long grounding plate 33; the long signal terminal 31 also includes a second insert matching portion 313, the second insert matching portion 313 has a second stepped thickness transition section 314, and has a second semicircular conical small boss 315.

[0049] The long signal needle unit 32 has symmetrical rectangular notches 321 on both sides of the signal terminal; a rectangular long notch 322 at the bottom; a rectangular notch 323, a symmetrical cutout 324, and a semicircular boss 325 at the top; and an irregular ridge 326 on the left.

[0050] The long grounding piece 33 includes: a first contact portion 331 and a second contact portion 332; wherein the first contact portion 331 is a four-petal cantilever beam contact piece; wherein the second contact portion 332 is an irregular spring-type cantilever beam contact piece; there is a rectangular U-shaped notch 333 on the upper part of the short grounding piece 33, and there are semicircular bosses 334 on the front and rear parts of the upper part and the front and rear parts of the right side, and the specifications of the front boss are smaller than those of the rear part.

[0051] The first long contact portion 311 of the long signal terminal 31 and the first contact portion 331 of the long grounding plate 33 form the outer contact portion of the head for signal and power transmission of the contact piece inside the overall connector; the second long contact portion 312 of the long signal terminal 31 and the second contact portion 332 of the long grounding plate 33 form the tail contact portion of the signal and power transmission of the contact piece outside the overall connector, and present a three-section parallel and side-by-side structure of "ground, signal, ground";

[0052] like Figure 6 As shown, the cage spring type contact 6 is formed by rolling and winding segmented spring pieces 61, and the segmented spring pieces 61 are in an arc shape; an odd number of segmented spring pieces 61 or an even number of segmented spring pieces 61 are combined into the cage spring type contact 6.

[0053] like Figure 7 , Figure 8 As shown, the fixing plate 4 includes: a fixing plate mounting groove 41 , a fixing plate step 42 , and a fixing plate partition 43 ; the clamping plate 5 includes: a clamping plate mounting groove 51 , a clamping plate step 52 , a clamping plate partition 53 , and a clamping plate mounting hole 54 .

[0054] like Fig. 9 , Fig.10As shown, the multi-cavity short contact units 2 and the long contact units 3 are symmetrically arranged in two longitudinal rows of the base 1, and each forms at least one column in the transverse direction, so as to achieve electrical and signal connection with the wiring board pins 71 on the opposite sides when the wiring board 7 is inserted.

[0055] A connector assembly is provided: a wiring board 7; multi-cavity short contact units 2 and long contact units 3 are symmetrically arranged in two longitudinal rows on a base 1, and each forms at least one column in the transverse direction, so that when the wiring board 7 is inserted, electrical and signal connections can be achieved with the wiring board pins 71 on the opposite sides.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A multi-channel coaxial connector, characterized in that: include: Base (1); At least two contact units, the contact units include a signal terminal, a signal needle unit and a grounding sheet, the second contact portion of the signal terminal is a width-stepped spring-type cantilever beam contact piece, the signal needle unit is a composite piece formed by plastic injection molding and embedded in the signal terminal, the second contact portion of the grounding sheet is arranged in parallel with the second contact portion of the signal terminal, the two constitute the tail contact portion of the power transmission and present a "ground, signal, ground" three-section parallel side-by-side structure; At least two isolating members are installed in the base (1) and are used to separate the signal terminal and the grounding plate of the contact unit.

2. The multi-channel coaxial connector according to claim 1, characterized in that: At least two of the contact units include a short contact unit (2) and a long contact unit (3); The short contact unit (2) comprises a short signal terminal (21), a short signal needle unit (22) and a short grounding plate (23); The long contact unit (3) comprises a long signal terminal (31), a long signal needle unit (32) and a long grounding sheet (33).

3. The multi-channel coaxial connector according to claim 2, characterized in that: The short signal terminal (21) comprises a first short contact portion (211) and a second short contact portion (212); the long signal terminal (31) comprises a first long contact portion (311) and a second long contact portion (312); the first short contact portion (211) and the first long contact portion (311) both comprise a cage spring type contact piece (6); the second short contact portion (212) is a spring-type cantilever beam contact piece with a stepped gradient width, wherein the three-stage gradient width is W1>W2>W3, and a ridge is present at the bend of W3; the second long contact portion (312) is a spring-type cantilever beam contact piece with a stepped gradient width, wherein the two-stage gradient width is W4>W5, and a rectangular boss is present at W4, and a ridge is present at the bend of W5; The short signal needle unit (22) and the long signal needle unit (32) are both plastic injection-molded components respectively embedded in the short signal terminal (21) and the long signal terminal (31); The (232) in the short grounding sheet (23) and the (332) in the long signal needle unit (32) are respectively arranged in parallel with the second short contact portion (212) and the second long contact portion (312), and constitute the tail contact portion for power transmission and present a "ground, signal, ground" three-section parallel parallel structure.

4. The multi-channel coaxial connector according to claim 3, characterized in that: At least two of the isolating members include a fixing plate (4) and a clamping plate (5), wherein the fixing plate (4) is used to separate the short signal terminal (21) and the short grounding plate (23) in the short contact unit (2), and the clamping plate (5) is used to separate the long signal terminal (31) and the long grounding plate (33) in the long contact unit (3).

5. The multi-channel coaxial connector according to claim 4, characterized in that: The fixing plate (4) comprises a plurality of fixing plate mounting grooves (41), the plurality of fixing plate mounting grooves (41) are evenly arranged in a horizontal direction, each fixing plate mounting groove (41) comprises a fixing plate step (42) and two fixing plate mounting holes (43), each fixing plate mounting hole (43) separates the short signal terminal (21) and the short grounding plate (23) in the horizontal direction; between every two adjacent fixing plate mounting grooves (41) there is a short signal terminal (21) and a short grounding plate (23) arranged in the longitudinal direction.

6. The multi-channel coaxial connector according to claim 5, characterized in that: The clamping plate (5) comprises a plurality of clamping plate mounting grooves (51), the plurality of clamping plate mounting grooves (51) are evenly arranged in a horizontal direction, each clamping plate mounting groove (51) comprises a clamping plate step (52) and two clamping plate partitions (53), each clamping plate partition (53) separates the long signal terminal (31) and the long grounding plate (33) in the horizontal direction; between every two adjacent clamping plate mounting grooves (51), there is a long signal terminal (31) and a long grounding plate (33) arranged in the longitudinal direction.

7. The multi-channel coaxial connector according to claim 6, characterized in that: The multi-channel coaxial connector also includes a wiring board (7); The base (1) comprises a fixing plate slot (15), a clamping plate pushing slot (16) and a wiring installation slot (17); the multi-channel coaxial connector comprises a fixing plate (4) and two clamping plates (5); the fixing plate (4) is installed in the fixing plate slot (15), and the two clamping plates (5) are installed in the clamping plate pushing slot (16), so that an installation cavity for the wiring board (7) is formed between a longitudinal slot and the wiring installation slot (17).

8. The multi-channel coaxial connector according to claim 2, characterized in that: The short contact units (2) and the long contact units (3) are symmetrically arranged in two longitudinal rows of the base (1), and each forms at least one column in the transverse direction.

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