CN111244669A

CN111244669A - Dustproof high-speed electric connector

Info

Publication number: CN111244669A
Application number: CN202010163432.XA
Authority: CN
Inventors: 林海燕; 蔡友华
Original assignee: Xing Wan Lian Electronics Co ltd
Current assignee: Xing Wan Lian Electronics Co ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-06-05

Abstract

The invention discloses a dustproof high-speed electric connector which comprises a longitudinal insulating body, a plurality of metal terminals fixedly held in the insulating body and a metal shell covering the insulating body, wherein the insulating body comprises two longitudinal side walls, an inserting groove is formed between the two side walls, a plurality of accommodating holes are formed in the inner wall surfaces of the two side walls and penetrate through the top and bottom surfaces of the side walls, the metal terminals are arranged along the inner wall surfaces of the side walls and are accommodated in the corresponding accommodating holes, the metal shell comprises two metal shells, the two metal shells are respectively attached to the outer wall surfaces of the two side walls, and the upper ends of the two metal shells are oppositely bent to form shielding parts which completely shield the accommodating holes in the top surfaces of the two side walls. The dustproof high-speed electric connector plays a good role in dust prevention, water vapor prevention, warping prevention and the like by completely shielding the concave accommodating hole on the top surface of the insulating body.

Description

Dustproof high-speed electric connector

Technical Field

The present invention relates to a socket type connector, and more particularly, to a dust-proof high-speed electrical connector.

Background

With the increasing signal transmission speed required by electronic products, the overall dimensions of slot connectors, such as DDR (double data rate) memory bank slot connectors, PCIE (bus interface) expansion slot connectors, and the like, are becoming smaller and smaller, and metal cases are added outside the connectors for shielding and enhancing applications. However, the metal shell does not shield the terminal hole recessed in the top surface of the insulating body, and thus does not have the functions of dust prevention, water vapor prevention and the like.

Disclosure of Invention

The invention aims to provide a dustproof high-speed electric connector which plays good roles of dust prevention, water vapor prevention and the like by completely shielding a concave accommodating hole on the top surface of an insulating body.

In order to achieve the above object, the present invention provides a dustproof high-speed electrical connector, which includes an elongated insulating body, a plurality of metal terminals fixed in the insulating body, and a metal shell covering the insulating body, wherein the insulating body includes two elongated side walls, a slot is formed between the two side walls, a plurality of receiving holes are formed in inner wall surfaces of the two side walls, the receiving holes penetrate through top and bottom surfaces of the side walls, the plurality of metal terminals are arranged along inner wall surfaces of the side walls and are received in the corresponding receiving holes, the metal shell includes two metal shells, the two metal shells are respectively attached to outer wall surfaces of the two side walls, and upper ends of the two metal shells are bent in opposite directions to form a shielding portion for completely shielding the receiving holes on the top surfaces of the two.

As a further improvement of the invention, the top surface of the side wall is recessed to form a first groove distributed along the length direction of the side wall, the first groove extends inwards from the outer wall surface of the side wall to the near side of the inner wall surface of the side wall beyond the accommodating hole of the top surface of the side wall, the bottom wall of the first groove and the top of the inner wall surface form a height difference, the shielding part is just positioned in the first groove, and the top surface of the shielding part is at most flush with the top of the inner wall surface of the side wall.

As a further improvement of the invention, the outer edges of the bottom wall of the first groove and the outer edges of the first groove, which are parallel to the length direction of the slot, are upwards protruded to form a plurality of buckling parts which are distributed at intervals along the length direction of the side wall, the tops of the buckling parts are flush with the top surface of the shielding part, and a plurality of buckling holes matched with the corresponding buckling parts are formed in the bending part of the metal shell, which is bent to form the shielding part.

As a further improvement of the invention, the upper part of the outer wall surface of the side wall is recessed inwards to form a second groove which is distributed along the length direction of the side wall, the side wall of the second groove which is parallel to the slot and vertical to the top surface of the side wall is an upper outer wall surface, the outer edge of the bottom wall of the first groove which is parallel to the length direction of the slot is the upper edge of the upper outer wall surface, the lower part of the outer wall surface of the side wall is a lower outer wall surface, the bottom wall of the second groove is recessed downwards to form a first clamping groove which is distributed along the length direction of the side wall, the lower outer wall surface is positioned outside the first clamping groove, and the metal shell is.

As a further improvement of the invention, the bottom wall of the first clamping groove is provided with a plurality of second clamping grooves which are distributed at intervals along the length direction of the side wall, the second clamping grooves penetrate through the bottom of the side wall, the lower edge of the metal shell extends downwards to form a plurality of buckles which are distributed at intervals, and each buckle is inserted and fixed in the corresponding second clamping groove.

As a further improvement of the invention, the second clamping groove extends inwards to form a top wall of the second clamping groove, the buckle comprises a pin, an opening is formed in the pin, the lower edge of the opening is connected with an inwards inclined buckling part, the pin is inserted into the second clamping groove, and the buckling part is abutted against the top wall of the second clamping groove.

As a further improvement of the invention, a first retaining wall is arranged between the accommodating hole on the top surface of the side wall and the accommodating hole on the inner wall surface, the first groove extends to the position from the accommodating hole on the top surface of the side wall to the first retaining wall and does not exceed the middle part of the first retaining wall, the top of the first retaining wall is the top of the inner wall surface of the side wall, and the inner side surface of the first retaining wall is the inner wall surface of the side wall.

As a further improvement of the invention, two side faces of each accommodating hole perpendicular to the length direction of the slot protrude oppositely to form a second retaining wall, each metal terminal comprises a contact part, a fixing part and a welding part which are distributed up and down, the contact part extends into the slot, the tail end of the contact part is the upper tail end of the metal terminal, the fixing part is fixed on the inner wall of the accommodating hole in an interference mode, a force arm is arranged between the contact part and the fixing part, and the force arm is pre-pressed and supported on the second retaining wall.

As a further improvement of the invention, the contact part is formed by bending upwards from the upper end of the force arm, the width direction of the force arm is the same as the length direction of the slot, and the width of the contact part is smaller than that of the force arm.

As a further improvement of the present invention, the upper end of the second retaining wall extends to the bottom wall of the first retaining wall, and the top end of the metal terminal is located below the bottom wall of the first retaining wall and is not in contact with the bottom wall of the first retaining wall.

Compared with the prior art, the dustproof high-speed electric connector has the following beneficial effects:

(1) the shielding part of the metal shell completely shields the accommodating hole which is recessed on the top surface of the insulating body, no gap is left, and good dustproof and moisture-proof effects are achieved.

(2) The first groove is formed on the top surface of the side wall in a concave mode, so that the shielding part is at most flush with the top of the inner wall surface of the side wall when being located in the first groove and cannot be higher than the top of the inner wall surface of the side wall, and the increase of the height of the insulating body is avoided.

(3) The buckling part is matched with the buckling hole of the metal shell, so that the metal shell is more firmly installed.

(4) Through the second groove sunken in the outer wall surface of the side wall, the metal shell is positioned in the second groove and is inserted into the first clamping groove and attached to the upper outer wall surface, so that the increase of the thickness of the insulating body is avoided.

(5) Through the design of draw-in groove two and buckle, make metal casing's installation more firm, metal casing still assists the enhancement plastic main part simultaneously, reaches the proof warp effect.

(6) The metal terminal is lowered from the position where the metal terminal is pre-pressed and supported on the insulating body to the moment arm position, so that the position where the metal terminal is pre-pressed and supported on the insulating body can be removed, the length of the metal terminal is shortened, and the crosstalk between adjacent metal terminals is reduced; and the distance between the contact point of the contact portion and the end of the contact portion is short, which is the end of the contact portion, that is, the upper end of the metal terminal, so that the antenna effect can be reduced to satisfy the high frequency performance of the product.

(7) The prepressing part of the metal terminal is reduced to the force arm position to be prepressed and supported on the insulating body, so that the metal terminal has enough elasticity and prepressing force, and the contact point intervals of the contact parts of the metal terminals are ensured to be consistent.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.

Drawings

Fig. 1 is an exploded perspective view of the dustproof high-speed electrical connector, a circuit board and an electronic card according to the present invention.

Fig. 2 is a perspective assembly view of the dustproof high-speed electrical connector of the present invention.

Fig. 3 is a perspective view of the metal case of fig. 2 removed.

Fig. 4 is a transverse cross-sectional view of the dustproof high-speed electrical connector of the invention at the buckling hole and buckling position, and only shows a metal shell on one side.

Fig. 5 is a cross-sectional view of the dust-proof high-speed electrical connector of the present invention at the buttonhole and snap position, showing the double-sided metal shell.

Fig. 6 is a transverse cross-sectional view of the dust-proof high-speed electrical connector of the present invention at the location of the receiving hole.

Fig. 7 is a transverse cross-sectional view of the dustproof high-speed electrical connector of the present invention, assembled with a circuit board and an electronic card, the cross-sectional view being at the fastening hole and the fastening position.

Fig. 8 is a longitudinal cross-sectional view of the dust-proof high-speed electrical connector of the present invention at the location of the metal terminals.

Fig. 9 is a perspective view of a metal terminal of the dust-proof high-speed electrical connector of the present invention.

Detailed description of the embodiments reference is made to the accompanying drawings in which:

the insulation structure comprises an insulation body 1, a slot 10, a side wall 11, a first retaining wall 11a, a fool-proof part 11b, a first groove 11c, a buckling part 11d, a second groove 11e, a first clamping groove 11f, a second clamping groove 11g, a clamping groove top wall 11h, an upper outer wall surface a, a lower outer wall surface b, an accommodating hole 12, a top wall 12a, a side surface 121 and a second retaining wall 122; the metal terminal 2, the contact part 21, the end 211, the arm 22, the holding part 23, the welding part 24; the metal shell 3, the metal shell 31, the shielding part 32, the buckle 33, the pin 331, the opening 332, the buckling part 333 and the buckling hole 3 a; an electronic card 4; a circuit board 5.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements.

Referring to fig. 1-9, the dustproof high-speed electrical connector includes an insulative housing 1, a plurality of metal terminals 2 and a metal shell 3.

The insulating body 1 is a longitudinal insulating body, a top surface of the insulating body is recessed downwards along a longitudinal direction to form a slot 10, the slot 10 is used for inserting an electronic card 4 (not shown in the figure), and two side walls 11 are arranged on two sides of the slot 10. The internal wall surfaces of the two side walls 11 are provided with a plurality of receiving holes 12 distributed at intervals along the longitudinal direction of the insulating body 1, the receiving holes 12 on the two side walls 11 correspond to each other one by one and the receiving holes 12 on each side wall 11 penetrate through the two top surfaces and the two bottom surfaces of the side wall 11, the receiving holes 12 on the internal wall surfaces of the two side walls 11 are provided with top walls 12a, that is, a retaining wall 11a is arranged between the receiving holes 12 at the internal wall surfaces of the two side walls 11 and the receiving holes 12 at the top surfaces of the two side walls 11, all the retaining walls 11a on each side wall 11 are connected into a whole, and the top walls 12a of the receiving holes 12 at the internal wall surfaces of the side walls 11 are also the bottom walls. Two side surfaces 121 of the accommodating hole 12 at the inner wall surfaces of the two side walls 11, which are perpendicular to the longitudinal direction of the slot 10, protrude oppositely to form a second retaining wall 122, and the upper end of the second retaining wall 122 extends to the top wall 12a of the accommodating hole 12, that is, the bottom wall of the first retaining wall 11 a. The second retaining wall 122 is designed to reduce the width of the receiving hole 12 on the inner wall of the two side walls 11. The insertion groove 11 is a non-penetrating groove divided by the fool-proof portion 11 b.

The top surface of the side wall 11 is recessed to form a first groove 11c distributed along the length direction of the side wall 11, the first groove 11c extends inwards from the outer wall surface of the side wall 11 and exceeds the accommodating hole 12 on the top surface of the side wall 11 to the near side of the inner wall surface of the side wall 11, and a height difference is formed between the bottom wall of the first groove 11c and the top of the inner wall surface. The first recess 11c extends beyond the receiving hole 12 on the top surface of the sidewall 11 to the first retaining wall 11a and does not exceed the middle of the first retaining wall 11a, the top of the first retaining wall 11a is the top of the inner wall surface of the sidewall 11, and the inner side surface of the first retaining wall 11a is the inner wall surface of the sidewall 11. The bottom wall of the first groove 11c and the outer edge parallel to the length direction of the slot 10 protrude upwards to form a plurality of buckling parts 11d distributed at intervals along the length direction of the side wall 11.

The upper portion of the outer wall surface of the side wall 11 is inwards recessed to form a second groove 11e distributed along the length direction of the side wall 11, the second groove 11e is communicated with a first groove 11c, the side wall, parallel to the slot 10, of the second groove 11e is an upper outer wall surface a, and the outer edge, parallel to the length direction of the slot 10, of the bottom wall of the first groove 11c is the upper edge of the upper outer wall surface a. The lower part of the outer wall surface of the side wall 11 is a lower outer wall surface b, and the lower outer wall surface b and the upper outer wall surface a form the outer wall surface of the side wall 11. The bottom wall of the second groove 11e is recessed downwards to form a first clamping groove 11f distributed along the length direction of the side wall 11, the lower portion of the upper outer wall surface a is the inner wall surface of the first clamping groove 11f, and the lower outer wall surface b is located on the outer side of the first clamping groove 11 f. The bottom wall of the first clamping groove 11f is provided with a plurality of second clamping grooves 11g distributed at intervals along the length direction of the side wall 11, the second clamping grooves 11g penetrate through the bottom of the side wall 11, and the second clamping grooves 11g extend inwards to form clamping groove top walls 11h of the second clamping grooves 11 g.

The metal terminals 2 include a current conducting terminal, a signal conducting terminal and a ground shield terminal. The metal terminals 2 are correspondingly accommodated in the accommodating holes 12, and the top ends of the metal terminals 2 are located below the top wall 12a of the corresponding accommodating holes 12 and do not contact with the top wall 12a of the accommodating holes 12, that is, the bottom wall of the first retaining wall 11 a. The width direction of each metal terminal 2 is the same as the longitudinal direction of the slot 10, and the thickness direction of each metal terminal 2 is perpendicular to the longitudinal direction of the slot 10. The metal terminal 2 is composed of a contact portion 21, a moment arm 22, a holding portion 23, and a soldering portion 24. The contact portion 21 has elasticity, the contact portion 21 protrudes from the inner wall surface of the sidewall 11 into the insertion slot 10, and the electronic card 4 is electrically contacted with the contact portion 21 when inserted into the insertion slot 10. The upper end of the contact portion 21 is a terminal 211, the terminal 211 is an upper terminal of the metal terminal 2, the highest point of the inner wall surface of the contact portion 21 protruding from the sidewall 11 is a contact point 212, the portion between the contact point 212 and the terminal 211 acts as the same as the antenna, and the distance between the contact point 212 and the terminal 211 is short, so that the antenna effect can be reduced. The end 211 is not in contact with the top wall 12a of the receiving hole 12, i.e., the bottom wall of the first retaining wall 11 a. The upper end of the force arm 22 is bent upwards to form the contact part 21, the width of the contact part 21 is smaller than that of the force arm 22, the force arm 22 is pre-pressed and supported on the second retaining wall 122, and is pre-pressed and supported on the side face, away from the slot 10, of the second retaining wall 122, and a retaining force is provided for the upper portion of the metal terminal 2. The contact portion 21 is higher than the arm 22 and is pre-pressed against the second retaining wall 122. The holding portion 23 is formed by extending downward from the lower end of the arm 22, and the holding portion 23 is fixed on the inner wall of the receiving hole 12 near the bottom surface of the insulating housing 1 by interference. The soldering portion 24 is formed by extending from the lower end of the fixing portion 23, the soldering portion 24 is perpendicular to the fixing portion 23, and the soldering portion 24 is used for soldering on a circuit board 5, so that the electronic card 4 is electrically connected with the circuit board 5.

The metal shell 3 comprises two independent metal shells 31, and the two metal shells 31 are respectively located in the two grooves two 11e on the outer sides of the two side walls 11, are respectively inserted into and fixed in the corresponding clamping grooves one 11f, and are attached to the upper outer wall surface a. The upper edges of the two metal shells 31 are oppositely and vertically bent to form shielding parts 32 which completely shield the accommodating holes 12 on the top surfaces of the two side walls 11, the length of the shielding parts 32 in the longitudinal direction of the insulating body 1 is equal to the length of the metal shells 31, the shielding parts 32 are just positioned in the first grooves 11c, and the top surfaces of the shielding parts 32 are at most flush with the top of the inner wall surface of the side walls 11, that is, the top surfaces of the shielding parts 32 are not higher than the top of the inner wall surface of the side walls 11. The top of the engaging portion 11d is flush with the top surface of the shielding portion 32. The metal shell 3 is bent to form a plurality of buckling holes 3a matched with the corresponding buckling parts 11d at the bending part of the shielding part 32.

The lower edge of the metal shell 31 extends downwards to form a plurality of buckles 33 distributed at intervals, the number of the buckle holes 3a is equal to that of the buckles, the buckles are in one-to-one correspondence, and each buckle 32 is inserted and fixed into the corresponding second clamping groove 11 g. The buckle 33 includes a rectangular pin 331, the pin 331 is provided with an opening 332, a lower edge of the opening 332 is integrally connected with a buckling part 333 which inclines inwards, the pin 331 is inserted into the second card slot 11g, and the buckling part 333 is propped against the top wall 11h of the second card slot 11 g. The metal shell 31 can be firmly installed by the cooperation of the buckle 33 and the second clamping groove 11g and the cooperation of the buckling part 11d and the buckling hole 3 a. Meanwhile, the metal shell also assists in reinforcing the plastic main body, so that the buckling prevention effect is achieved. Besides the clips 33, a plurality of conducting pins (not shown in the figures and designed as the prior art) extending downward from the lower edge of the metal shell 31 are electrically connected to the ground shield terminal of the metal terminal, and the conducting pins are distributed between the adjacent clips 33 and spaced from the clips 33, so as to enhance the grounding function of the ground shield terminal, reduce the electromagnetic interference between the metal terminals, and ensure the high-frequency transmission performance of the high-speed dustproof electrical connector.

In the invention, the shielding part 32 of the metal shell 3 is adopted to completely shield the accommodating hole 12 which is concave on the top surface of the insulating body 1 without leaving a gap, thereby achieving good effects of dust prevention, water vapor prevention and the like; after the electronic card 4 is inserted, the two shoulders of the lower end of the electronic card 4 are just positioned at the upper sides of the shielding parts 32 of the two metal shells 3 to block the part of the shielding parts 32 close to the first retaining wall 11a, so that the dustproof and waterproof effects are better. In the invention, the first groove 11c and the second groove 11e which are communicated with each other are respectively formed by recessing the top surface and the side surface of the side wall 11, so that the metal shell 31 is convenient to mount, and the increase of the height and the thickness of the insulating body 1 is avoided. The invention also reduces the position of the metal terminal 2 which is pre-pressed and supported on the insulating body 1 to the moment arm 22 by shortening the length of the metal terminal 2, and reduces the distance from the contact point 212 of the contact part 21 to the tail end 211, thereby reducing the crosstalk between the adjacent metal terminals 2, reducing the antenna effect and meeting the high-frequency performance of the product.

The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are made in accordance with the spirit of the present invention.

Claims

1. The utility model provides a dustproof high-speed electric connector, its characterized in that, includes the insulator of lengthwise, fixes a plurality of metal terminals and the metal casing of cladding insulator in the insulator, insulator includes the side wall of two lengtheners, forms the slot between two side walls, and two side wall internal faces are opened there are a plurality of accepting holes, and the accepting hole link up the top two sides of side wall, a plurality of metal terminals are arranged and are acceptd in corresponding accepting hole along the side wall internal face, metal casing includes two metal casing, and two metal casing attach respectively in the outer wall of two side walls, its characterized in that: the upper ends of the two metal shells are oppositely bent to form shielding parts which completely shield the accommodating holes on the top surfaces of the two side walls.

2. The dust-resistant high-speed electrical connector of claim 1, wherein: the top surface of the side wall is sunken to form a first groove distributed along the length direction of the side wall, the first groove extends inwards from the outer wall surface of the side wall to a position close to the inner wall surface of the side wall and beyond the accommodating hole of the top surface of the side wall, the bottom wall of the first groove and the top of the inner wall surface form a height difference, the shielding part is just positioned in the first groove, and the top surface of the shielding part is at most flush with the top of the inner wall surface of the side wall.

3. The dust-resistant high-speed electrical connector of claim 2, wherein: the outer edge of the bottom wall of the first groove, which is parallel to the length direction of the slot, protrudes upwards to form a plurality of buckling parts which are distributed at intervals along the length direction of the side wall, the top of each buckling part is flush with the top surface of the shielding part, and a plurality of buckling holes matched with the corresponding buckling parts are formed in the bending part of the metal shell, which is bent to form the shielding part.

4. The dust-protected high-speed electrical connector of claim 3, wherein: the utility model discloses a side wall, including the groove two, the groove two is parallel with the slot and is last outer wall with side wall top surface vertically lateral wall, the diapire of groove one is the top edge of last outer wall with the parallel outward flange of slot length direction, the outer wall lower part of side wall is outer wall down, the diapire undercut of groove two forms along the draw-in groove one that side wall length direction distributes, lower outer wall is located the outside of draw-in groove one, metal casing is located groove two and insert and be fixed in draw-in groove one and attached in last outer wall.

5. The dust-protected high-speed electrical connector of claim 4, wherein: the bottom wall of the first clamping groove is provided with a plurality of second clamping grooves distributed at intervals along the length direction of the side wall, the second clamping grooves penetrate through the bottom of the side wall, the lower edge of the metal shell extends downwards to form a plurality of buckles distributed at intervals, and each buckle is inserted and fixed into the corresponding second clamping groove.

6. The dust-protected high-speed electrical connector of claim 5, wherein: the second clamping groove extends inwards to form a second clamping groove top wall, the buckle comprises the plug foot, the plug foot is provided with an opening, the lower edge of the opening is connected with an inwards inclined buckling part, and the plug foot is inserted into the second clamping groove and abuts against the clamping groove top wall of the second clamping groove.

7. The dust-proof high-speed electrical connector of any one of claims 2 to 6, wherein: have barricade one between the accepting hole of side wall top surface and the accepting hole of internal face, recess one extends to barricade one and just is no longer than the position at barricade middle part beyond the accepting hole of side wall top surface, and the top of barricade one is the top of side wall internal face, and the medial surface of barricade one is the internal face of side wall.

8. The dust-protected high-speed electrical connector of claim 7, wherein: the two side faces of each accommodating hole perpendicular to the length direction of the slot protrude oppositely to form a second retaining wall, each metal terminal comprises a contact part, a fixing part and a welding part which are distributed from top to bottom, the contact part extends into the slot, the tail end of the contact part is the upper tail end of the metal terminal, the fixing part is fixed on the inner wall of the accommodating hole in an interference mode, a force arm is arranged between the contact part and the fixing part, and the force arm is pre-pressed and supported on the second retaining wall.

9. The dust-protected high-speed electrical connector of claim 8, wherein: the contact part is formed by bending the upper end of the force arm upwards, the width direction of the force arm is the same as the length direction of the slot, and the width of the contact part is smaller than that of the force arm.

10. The dust-protected high-speed electrical connector of claim 8, wherein: the upper end of the first retaining wall extends to the bottom wall of the second retaining wall, and the top end of the metal terminal is located below the bottom wall of the first retaining wall and is not in contact with the bottom wall of the first retaining wall.