CN119812858B - Straight connector - Google Patents

Abstract

The invention provides a straight connector, and belongs to the field of connecting devices. The straight connector comprises a shell, a signal contact part, an insulator and a shielding piece, wherein the shielding piece is in a cylinder shape, the shielding piece comprises a main body part and a connecting part positioned at one end of the main body part, the insulator is separated from the shell and is fixedly arranged in the main body part of the shielding piece, a cavity for accommodating the plug-in end of the signal contact part is arranged in the insulator in a penetrating manner, the insulator is used for insulating between the signal contact part and the shielding piece, and the connecting part of the shielding piece penetrates through the shell along the plug-in direction of the connector and is fixedly connected with the shell. According to the invention, the shielding piece is arranged into a cylindrical structure which is fully shielded, the insulator is separated from the shell, and the insulator is fixed in the shielding piece, so that on one hand, a better shielding effect can be obtained, and on the other hand, the shell can be conveniently processed in a one-die multi-hole mode, and the production efficiency of the shell is improved.

Description

Straight connector

Technical Field

The invention belongs to the field of connecting devices, and particularly relates to a straight connector.

Background

The straight connector generally includes a housing and terminal modules mounted on the housing, each of the terminal modules including an insulator and conductive terminals secured in the insulator. The prior Chinese patent with the bulletin number of CN212849126U discloses a backboard connector, which belongs to a straight connector. The back-plate connector comprises a housing, wherein an insulating protrusion (i.e., an insulator) is integrally extended from the base of the housing, and a conductive terminal is installed in the insulating protrusion.

The backboard connector further comprises a shielding piece, the upper portion of the shielding piece is cylindrical, the lower portion of the shielding piece is of a C-shaped structure with one side open, the shielding piece is sleeved outside the insulation protrusions, and the shielding piece plays a role in electromagnetic shielding on the conductive terminals in the insulation protrusions. The base of the shell is penetrated and provided with a C-shaped positioning groove around the insulating bulge, and the lower part of the shielding piece is inserted into the positioning groove so as to ensure the stability of the shielding piece.

In the actual production process, in order to improve the production efficiency of the shell, a plurality of shells are generally formed by injection molding through one mold, but the injection molding pressure and temperature need to be controlled more precisely in the injection molding process in the mode, otherwise, the molding quality of weak parts on the shells is poor. The positioning groove weakens the connection strength between the insulation bulge and the base part of the shell, so that the connection part between the insulation bulge and the base part of the shell is weaker, and quality problems are easy to occur in one-time injection molding of a plurality of shells, therefore, in order to ensure molding quality, the number of shells formed by one-time injection molding of one mold is reduced as much as possible, and the production efficiency is seriously influenced.

The lower part of the shield is a C-shaped structure with one side opened in order to enable the insulation protrusion to be integrally connected with the base of the housing, but the opening will cause deterioration of the shielding effect. Especially, when the signal transmission rate is higher, crosstalk between the conductive terminal pairs for transmitting the differential signals is more obvious, and the influence of the open structure on signal transmission is more serious, so that more comprehensive shielding is needed to meet the use requirement of high-speed signal transmission.

Disclosure of Invention

The invention aims to provide a straight connector, which solves the technical problems that in the prior art, the straight connector is difficult to form a plurality of shells through one-step injection molding by one mold, so that the production efficiency is low and the shielding piece cannot form comprehensive shielding.

In order to achieve the above purpose, the technical scheme of the straight connector provided by the invention is as follows:

The utility model provides a straight connector, including casing, signal contact part, insulator and shield, the shield is the tube-shape, the shield includes main part and the connecting portion that is located main part one end, insulator and casing components of a whole that can function independently and fixed the setting in the main part of shield, link up in the insulator and be provided with the cavity that is used for holding signal contact part's grafting end, the insulator is used for insulating between signal contact part and shield, the connecting portion of shield runs through the casing along connector plug direction and with casing fixed connection.

As a further improvement, the connecting portion of the shielding member is provided with at least two openings for dividing the connecting portion into at least two separate bodies, and the housing is provided with a mounting hole or a mounting groove for inserting at least part of the connecting portion in a separate body and interference fit.

As a further improvement, the shielding piece is of a rectangular cylindrical structure, and openings are formed in all corners of the connecting portion.

As a further improvement, the split body of the connecting portion is provided with a protrusion structure for being closely fitted with the inner wall of the mounting hole or the mounting groove to enhance the connection strength of the split body of the corresponding connecting portion and the housing.

As a further improvement, an assembly hole through which the signal contact part passes is provided in the housing, the signal contact part includes an insulating positioning body and a contact fixed on the insulating positioning body, the insulating positioning body includes an assembly portion and a positioning portion, the assembly portion is inserted into the assembly hole, and at least part of the edge of the positioning portion protrudes from the assembly portion to form a positioning step surface between the positioning portion and the assembly portion, which is in stop fit with the housing.

As a further improvement, the straight connector further comprises a positioning plate, the housing comprises a pair insertion end for being inserted with the adapter connector, and a mounting end for being mounted on the printed board, the positioning plate is arranged at the mounting end of the housing, positioning holes are formed in the positioning plate corresponding to the assembly holes, and the positioning parts are inserted in the positioning holes.

As a further improvement, the two parallel split bodies of the connecting part are second split bodies, the two second split bodies are positioned in the positioning hole and are respectively in close fit with the two opposite hole walls of the positioning hole, the positioning part is positioned between the two second split bodies, and the positioning part is in close fit with the two second split bodies and the rest hole walls of the positioning hole.

As a further improvement, the hole wall of the positioning hole for being matched with the connecting part body comprises a plane part and a protruding part, and the protruding part is matched with the corresponding connecting part body tightly.

As a further improvement, the shell is provided with an assembly hole for the signal contact part to pass through, two mutually parallel split bodies of the connecting part are second split bodies, the two second split bodies are positioned in the assembly hole and respectively and tightly matched with two opposite side walls of the assembly hole, the signal contact part comprises an insulation positioning body and a contact piece fixed on the insulation positioning body, the insulation positioning body is inserted in the assembly hole and positioned between the two second split bodies, and the insulation positioning body is tightly matched with the two second split bodies and the rest hole walls of the assembly hole.

As a further improvement, the straight connector further comprises a positioning plate, the housing comprises a counter-insertion end for counter-insertion with the mating connector and a mounting end for mounting on the printed board, the positioning plate is arranged at the mounting end of the housing, and the positioning plate is a conductor and is in contact conduction with each shielding piece.

As a further improvement, the positioning plate is made of conductive plastic or plastic plate with a conductive layer on the outer surface, one side of the positioning plate far away from the shell is provided with a grounding plate, the grounding plate is provided with a grounding bulge for conducting with the grounding of the printed board, and the grounding plate is conducted with the positioning plate.

As a further improvement, an adjusting window for adjusting the impedance is provided on the shield.

As a further improvement, the shielding piece is provided with deformed windows corresponding to the plugging ends of the signal contact parts for outward expansion deformation of the plugging ends, and the insulator is provided with corresponding windows corresponding to the deformed windows one by one.

The invention has the beneficial effects that the straight connector provided by the invention belongs to the invention creation of element relation change type. Compared with the prior art, the straight connector has the advantages that the shielding piece is arranged into the cylindrical structure with complete shielding, a better shielding effect can be obtained, meanwhile, the insulator is separated from the shell, and the insulator is fixedly arranged in the shielding piece, so that the structure of the shell is simplified, the shell can be suitable for a one-die multi-hole production mode, and the production efficiency of the shell is improved.

Drawings

FIG. 1 is an exploded view of the entirety of embodiment 1 of the straight connector of the present invention;

Fig. 2 is a schematic view showing the structure of a shield and an insulator in embodiment 1 of the straight connector of the present invention;

fig. 3 is an exploded view of the shield and insulator of embodiment 1 of the straight connector of the present invention;

fig. 4 is a schematic structural view of a signal contact member in embodiment 1 of the straight connector of the present invention;

fig. 5 is a schematic view showing a partial structure of a housing in embodiment 1 of the straight connector of the present invention;

FIG. 6 is a schematic view showing a partial structure of a positioning plate in an embodiment 1 of a straight connector according to the present invention;

Fig. 7 is a schematic partial structure of a grounding plate in embodiment 1 of the straight connector of the present invention.

Reference numerals illustrate:

1. The device comprises a shell, 11, a base part, 12, a side plate, 13, a mounting hole, 14, a mounting hole, 15, a boss, 16, a groove, 17, a mounting groove, 2, a signal contact part, 21, an insulating positioning body, 211, a mounting part, 212, a positioning part, 213, a positioning step surface, 22, a contact part, 221, a plug end, 222, a signal fish eye, 3, an insulator, 31, a corresponding window, 4, a shielding part, 41, a main body part, 42, a connecting part, 43, a notch, 44, a first split body, 45, a second split body, 46, a grounding fish eye, 47, a protruding structure, 48, a deformation window, 49, an adjustment window, 5, a positioning plate, 51, a positioning jack, 52, a positioning hole, 521, a protruding part, 522, a plane part, 6, a grounding piece, 61, an opening, 62, a grounding protrusion, 63 and a connecting protrusion.

Detailed Description

The present invention is described in further detail below with reference to examples.

To solve the problems in the prior art, the basic idea of the present invention is to provide the shield with a fully shielded cylindrical structure, simultaneously separate the insulator from the housing and fix the insulator within the shield.

Specific embodiment 1 of the straight connector provided by the invention:

Referring to fig. 1, a straight connector includes a housing 1, a signal contact member 2, an insulator 3, a shield 4, a positioning plate 5, and a ground plate 6, and is mounted on a printed board in use.

The housing 1 is an insulating housing made of plastic, the housing 1 comprises a base 11 and two side plates 12, one end of the base 11 in the thickness direction faces towards the printed board, the other end of the base faces away from the printed board, the two side plates 12 are positioned at two opposite side edges of one end of the base 11, which faces away from the printed board, and a part between the two side plates 12 forms an insertion cavity for inserting an adapter connector. The end of the base 11 facing the printed board is the mounting end of the housing 1, and the end of the side plate 12 away from the base 11 is the opposite inserting end of the housing 1.

Referring to fig. 2, the shielding member 4 has a rectangular cylindrical structure, and includes a main body 41 and a connecting portion 42 at one end of the main body 41, wherein the main body 41 is located in the insertion cavity, and the connecting portion 42 penetrates through the base 11 of the housing 1 and is fixedly connected with the base 11.

Referring to fig. 3, the insulator 3 is provided with a cavity penetrating in a plugging direction for accommodating the plugging end 221 of the signal contact member 2, and the plugging direction in the present invention refers to a direction of plugging and unplugging when the straight connector is connected with the mating connector. The insulator 3 is fixedly disposed in the main body 41 of the shielding member 4, and the specific fixing manner may be assembly fixing, gluing or integrally connecting by injection molding. Specifically, the form of assembly fixation can be interference fit, also can process inwards protruding spacing protruding on shield 4, simultaneously process on insulator 3 with spacing protruding joint complex recess 16, with insulator 3 assembly back in shield 4, spacing protruding and recess 16 can realize spacing and fixed in the plug direction.

Four notches 43 are formed in the connecting portion 42 of the shielding piece 4 around the connecting portion 42, the four notches 43 are located at four corners of the connecting portion 42 respectively, the connecting portion 42 of the shielding piece 4 is divided into four split bodies by the four notches 43, two split bodies which are relatively narrow are first split bodies 44, two split bodies which are relatively wide are second split bodies 45, and a grounding fisheye 46 used for conducting with the grounding of the printed board is formed in the first split body 44. The two side walls of each slit 43, that is, the two ends of each split body in the direction around the shielding member 4 are provided with protruding structures 47, and the protruding structures 47 have a semicircular shape, a trapezoidal shape, or the like. In the assembly process, the protruding structures 47 are tightly contacted with the corresponding hole walls on the shell 1 and the positioning plate 5, and the hole walls are embedded into the corresponding hole walls in a mode of deforming the hole walls by extruding the hole walls, so that the stability and reliability of the shielding piece 4 are ensured.

Referring to fig. 5, two mounting holes 13 are provided in the housing 1 at positions corresponding to each of the shields 4, and an assembly hole 14 is provided between the two mounting holes 13. The two first split bodies 44 of the connection portion 42 are respectively inserted into the two mounting holes 13, while the two second split bodies 45 of the connection portion 42 are both inserted into the mounting holes 14, and the two second split bodies 45 are tightly fitted with opposite side walls of the mounting holes 14. The fitting hole 14 is provided for the second split 45 to pass through the housing 1 and to be fitted with the housing 1, on the one hand, and is also provided for the signal contact member 2 to pass through, on the other hand.

Referring to fig. 4, the signal contact part 2 includes an insulating positioning body 21 and a contact 22 fixed to the insulating positioning body 21, the contact 22 for transmitting differential signals, and the insulating positioning body 21 and the contact 22 are connected by integral injection molding. The insulating positioning body 21 includes an fitting portion 211 and a positioning portion 212, wherein the fitting portion 211 is inserted into the fitting hole 14 from the mounting end of the housing 1, and a part of the edge of the positioning portion 212 protrudes from the fitting portion 211, so that a positioning step surface 213 that is in stop-fit with the housing 1 in the insertion-and-extraction direction of the mating connector is formed between the positioning portion 212 and the fitting portion 211.

The two side walls of the assembly hole 14 which are not matched with the second split 45 are provided with bosses 15, the table surface of the bosses 15 is provided with grooves 16, the bosses 15 are integrally C-shaped, and a mounting groove 17 which ensures reliable assembly of the second split 45 is formed between the bosses 15 and the side walls of the assembly hole 14 which are matched with the second split 45. The shape of the assembling portion 211 is adapted to the shape of the space enclosed by the two bosses 15 and the second sub-body 45, and the assembling portion 211 is tightly fitted to both the bosses 15 and the second sub-body 45.

The locating plate 5 is located at the installation end of the shell 1, an embedding groove is formed in the end face of the installation end of the shell 1, and the locating plate 5 is embedded in the embedding groove. After the signal contact member 2 is assembled, the positioning plate 5 is assembled to the housing 1. Referring to fig. 6, the positioning plate 5 is provided with two positioning jacks 51 and a positioning hole 52 between the two positioning jacks 51 corresponding to each shielding piece 4, two first split bodies 44 on the shielding piece 4 respectively pass through the two positioning jacks 51 and are tightly matched with the hole walls of the positioning jacks 51, two second split bodies 45 on the shielding piece 4 respectively pass through the positioning holes 52, and the two second split bodies 45 are respectively tightly matched with two opposite side walls of the positioning hole 52. The positioning portion 212 of the insulating positioning body 21 is inserted into the positioning hole 52 and is tightly matched with the other two side walls of the positioning hole 52 and the two second split bodies 45.

The positioning plate 5 can play a role in stabilizing the respective shields 4 and the signal contact member 2, and in this embodiment the positioning plate 5 is a conductor, and thus can also play a role in electromagnetic shielding. The positioning plate 5 can be a metal conductor, conductive plastic or a plastic plate with a conductive layer on the outer surface. For easy assembly, in this embodiment, a plastic plate with a conductive layer on the outer surface is selected as the positioning plate 5, and the conductive layer may be processed by electroplating or spraying.

The positioning plate 5 is in contact conduction with each shielding piece 4, so that the shielding pieces 4 can be grounded after the positioning plate 5 is grounded, and the positioning plate 5 can play a role in electromagnetic shielding, so that the shielding effect is further improved. A side wall of the positioning hole 52 matched with the second sub-body 45 includes a plane portion 522 and a protruding portion 521, wherein the protruding portion 521 is tightly matched with the corresponding second sub-body 45, the protruding portion 521 can be specifically a convex strip or a convex point, and the protruding portion 521 is easier to be pressed and deformed in the assembling process, so that better conductive contact with the second sub-body 45 can be maintained, and the loading friction force can be avoided to be larger, so that the assembly is convenient.

The positioning plate 5 can be directly contacted with the grounding conductor on the printed board to realize grounding, but the direct contact has poor conductive effect, so that a convex structure can be arranged on the positioning plate 5 and is contacted with the grounding conductor by utilizing the convex structure. In order to further improve the grounding effect, a grounding plate 6 may be provided on the side of the positioning plate 5 away from the housing 1, the grounding plate 6 being a metal plate, and an electrical connection between the positioning plate 5 and the grounding conductor being achieved by the grounding plate 6.

Referring to fig. 7, the grounding plate 6 is provided with an opening 61 for passing through the signal contact part 2 and the shielding member 4, and a grounding protrusion 62 is arranged on one side of the grounding plate 6 facing the printed board, specifically, the grounding protrusion 62 is a spring claw, so that elastic contact with a grounding conductor on the printed board is realized, and the grounding reliability is improved. In other embodiments, the grounding lug 62 may be of a non-elastic construction. The grounding plate 6 is provided with a connection protrusion 63 towards one side of the positioning plate 5, a connection jack is arranged on the positioning plate 5 corresponding to the connection protrusion 63, the connection protrusion 63 is in plug-in fit with the connection jack, and mechanical connection and electrical connection between the positioning plate 5 and the grounding plate 6 are achieved. In other embodiments, the positioning plate 5 and the grounding plate 6 may be formed as a unitary structure by integral injection molding.

The two ends of the contact element 22 of the signal contact part 2 are exposed out of the insulating positioning body 21, wherein one end of the contact element 22 extending into the insulator 3 is of a double-shrapnel structure, a contact pin on the adapter connector can be inserted between the double shrapnels to realize conductive connection, and the double shrapnels form the plug-in end 221 of the signal contact part 2. During the insertion process, the double spring plates can be deformed outwards under the extrusion action of the contact pins. The other end of the contact 22 is formed with a signal fish eye 222 for mounting to a printed board. The shield 4 is provided with a deformation opening 48 corresponding to the insertion end 221 of the signal contact member 2 to reduce the resistance of the insertion end 221 to outward deformation. The insulator 3 is provided with the corresponding opening 31 corresponding to the deformation opening 48, so that the deformation resistance of the plug-in end 221 of the signal contact part 2 is reduced.

The shielding member 4 is further provided with an adjusting window 49 for adjusting the impedance, the adjusting window 49 being located on a side of the deformation window 48 close to the base 11 of the housing 1. The shielding piece 4 is formed by rolling a metal plate, and a dovetail groove structure capable of mutually riveting and biting two side edges is arranged at the rolled seam. Both the adjustment window 49 and the deformation window 48 are arranged on the side of the shielding 4 facing away from the joint.

The assembly process of the straight connector is specifically as follows, firstly, the insulator 3 and the shielding member 4 are fixed together, then the integral component formed by the insulator 3 and the shielding member 4 is assembled to the housing 1 from the opposite insertion end of the housing 1, then the signal contact component 2 is assembled to the housing 1 from the opposite insertion end of the housing 1, then the positioning plate 5 and the grounding plate 6 are assembled in sequence, and after all the components are assembled, the straight connector can be mounted on a printed board. For easy assembly, both end openings of the positioning hole 52 and the mounting hole 13 are provided with chamfers, both ends of the insulating positioning body 21 of the signal contact member 2 are also provided with chamfers, and the opening of each hole on the positioning plate 5 is provided with chamfers.

This straight connector separates insulator 3 and casing 1 to make the structure of casing 1 simpler, reduced the weak position on the casing 1, consequently can increase the quantity of the casing 1 that a mould once injection moulding goes out, can realize a mould 32 cave in the actual production process, and a prior art mould 4 cave all is difficult to realize, consequently greatly improved production efficiency.

And the shielding piece 4 of the straight connector adopts an omnibearing shielding design, so that the shielding effect is greatly enhanced, and the transmission of high-speed signals is facilitated. And after the notch 43 is arranged on the connecting part 42 of the shielding piece 4 of the straight connector, the contact area between the connecting part 42 and the shell 1 can be increased, the higher connection strength of the shielding piece 4 and the shell 1 is ensured, and the higher service life of the straight connector is ensured.

The second split 45 on the shield 4 on the housing 1 shares one fitting hole 14 with the insulating positioning body 21 on the signal contact member 2, and the second split 45 on the shield 4 on the positioning plate 5 shares one positioning hole 52 with the insulating positioning body 21 on the signal contact member 2, so that the straight connector can be compact in structure and is advantageous in size reduction.

Specific embodiment 2 of the straight connector provided by the invention:

this embodiment is based on embodiment 1, and differs from embodiment 1 in that no notch is provided in the shield member in this embodiment, and therefore, through holes through which the shield member passes are provided in both the housing and the positioning plate, and the ground plate, wherein the walls of the through holes in the housing and the positioning plate are brought into close contact with the shield member, so that the shield member is fixed.

The shielding piece in the embodiment is not provided with a notch, and the electromagnetic shielding capability of the shielding piece is stronger.

The signal contact member in this embodiment is required to be assembled into the shield member so that the signal contact member, the shield member and the insulator form a unitary member, and then the unitary member is assembled to the housing.

In other implementations of this embodiment, the insulating positioning body and the insulator of the signal contact member may be integrally injection molded, thereby reducing the number of parts. The signal contact part, the insulator and the shielding piece can be uniformly injection molded, so that the number of parts is further reduced, and the assembly efficiency is improved.

Specific embodiment 3 of the straight connector provided by the invention:

The present embodiment is based on embodiment 1, and is different from embodiment 1 in that the shield member and the housing in the present embodiment are fixedly connected by means of integral injection molding.

Specific embodiment 4 of the straight connector provided by the invention:

the present embodiment is based on embodiment 1, and is different from embodiment 1 in that the shielding member in this embodiment is a cylindrical structure, two slits are provided, and the connection portion of the shielding member is divided into two semicircular split bodies.

In this embodiment, two through holes through which two split bodies of the connecting part of the shielding member respectively pass are formed in the casing, the positioning plate and the grounding plate, and the through holes are arc-shaped holes with shapes matched with the split bodies, wherein hole walls of the through holes in the casing and the positioning plate are in close contact with the shielding member, so that the shielding member is fixed.

In this embodiment, the assembly hole for mounting the signal contact member on the housing is located between the two through holes on the housing, and the positioning hole for positioning the signal contact member on the positioning plate is located between the two through holes on the positioning plate.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. The straight connector is characterized by comprising a shell (1), a signal contact part (2), an insulator (3) and a shielding piece (4), wherein the shielding piece (4) is in a cylinder shape, the shielding piece (4) comprises a main body part (41) and a connecting part (42) positioned at one end of the main body part (41), the insulator (3) is separated from the shell (1) and fixedly arranged in the main body part (41) of the shielding piece (4), a cavity for accommodating a plug-in end (221) of the signal contact part (2) is arranged in the insulator (3) in a penetrating manner, the insulator (3) is used for insulation between the signal contact part (2) and the shielding piece (4), the connecting part (42) of the shielding piece (4) penetrates through the shell (1) along the plug-in direction of the connector and is fixedly connected with the shell (1), the connecting part (42) of the shielding piece (4) is provided with at least two openings (43) for separating the connecting part (42) into at least two parts, and at least parts of the connecting part (42) are inserted into and are in interference fit with each other or are arranged in the shell (1).

2. The straight connector according to claim 1, characterized in that the shielding member (4) has a rectangular cylindrical structure, and that the connecting portion (42) is provided with a notch (43) at each corner.

3. The straight connector according to claim 1 or 2, characterized in that the split of the connecting portion (42) is provided with a protrusion structure (47) for mating with the inner wall of the mounting hole (13) or the mounting groove (17) to enhance the connection strength of the split of the corresponding connecting portion (42) and the housing (1).

4. The straight connector according to claim 1 or 2, characterized in that the housing (1) is provided with a fitting hole (14) through which the signal contact member (2) passes, the signal contact member (2) comprises an insulating positioning body (21) and a contact member (22) fixed to the insulating positioning body (21), the insulating positioning body (21) comprises a fitting portion (211) and a positioning portion (212), the fitting portion (211) is inserted into the fitting hole (14), and at least part of the edge of the positioning portion (212) protrudes from the fitting portion (211) to form a positioning step surface (213) between the positioning portion (212) and the fitting portion (211) for a stop fit with the housing (1).

5. The straight connector according to claim 4, further comprising a positioning plate (5), wherein the housing (1) comprises a mating end for mating with the mating connector, a mounting end for mounting onto the printed board, the positioning plate (5) is disposed at the mounting end of the housing (1), the positioning plate (5) is provided with a positioning hole (52) corresponding to the assembly hole (14), and the positioning portion (212) is inserted into the positioning hole (52).

6. The straight connector according to claim 5, characterized in that the two parallel split parts of the connecting part (42) are second split parts (45), the two second split parts (45) are located in the positioning hole (52) and are respectively tightly matched with two opposite hole walls of the positioning hole (52), the positioning part (212) is located between the two second split parts (45), and the positioning part (212) is tightly matched with the two second split parts (45) and the rest hole walls of the positioning hole (52).

7. The straight connector according to claim 6, wherein the hole wall of the positioning hole (52) for being detachably engaged with the connecting portion (42) includes a flat portion (522) and a convex portion (521), and the convex portion (521) is detachably and tightly engaged with the corresponding connecting portion (42).

8. The straight connector according to claim 1 or 2, characterized in that the housing (1) is provided with a fitting hole (14) through which the signal contact member (2) passes, two mutually parallel split parts of the connecting portion (42) are second split parts (45), the two second split parts (45) are located in the fitting hole (14) and are respectively in close fit with two side walls opposite to the fitting hole (14), the signal contact member (2) comprises an insulating positioning body (21) and a contact piece (22) fixed on the insulating positioning body (21), the insulating positioning body (21) is inserted in the fitting hole (14) and is located between the two second split parts (45), and the insulating positioning body (21) is in close fit with the two second split parts (45) and the remaining hole walls of the fitting hole (14).

9. The straight connector according to claim 1 or 2, characterized in that the straight connector further comprises a positioning plate (5), the housing (1) comprising a counter-spigot for counter-spigot with the mating connector, a mounting end for mounting onto the printed board, the positioning plate (5) being arranged at the mounting end of the housing (1), the positioning plate (5) being a conductor and being in contact communication with the shields (4).

10. The straight connector according to claim 9, characterized in that the positioning plate (5) is a conductive plastic plate or a plastic plate with a conductive layer on the outer surface, a grounding plate (6) is arranged on one side of the positioning plate (5) far away from the housing (1), a grounding protrusion (62) for conducting with the grounding of the printed board is arranged on the grounding plate (6), and the grounding plate (6) is conducted with the positioning plate (5).

11. The straight connector according to claim 1 or 2, characterized in that the shield (4) is provided with an adjustment window (49) for adjusting the impedance.

12. The straight connector according to claim 1 or 2, characterized in that the shielding member (4) is provided with deformed windows (48) corresponding to the insertion ends (221) of the signal contact members (2) for outward expansion deformation of the insertion ends (221), and the insulator (3) is provided with corresponding windows (31) corresponding to the deformed windows (48) one by one.