Bonding-wire-free D-SUB electric connector

Abstract

The utility model discloses a bonding-wire-free D-SUB electric connector, which comprises a shell, a plurality of conductive terminals and a plurality of fastening screws, the shell is provided with a plurality of through holes along the vertical direction, the shell is provided with a plurality of threaded holes along the transverse direction, the plurality of threaded holes are communicated with the plurality of through holes in a one-to-one correspondence manner, and the plurality of conductive terminals and the plurality of fastening screws are arranged on the shell. The plurality of conductive terminals are respectively inserted into the plurality of through holes in a one-to-one correspondence manner, each conductive terminal comprises a wiring end and a connecting end, one side, facing the threaded holes, of each wiring end is provided with an abutting surface, and the plurality of fastening screws are respectively inserted into the plurality of threaded holes in a one-to-one correspondence manner; the external cable is inserted into one end of the through hole and abuts against the abutting face of the wiring end through the fastening screw so that wiring can be conducted, rapid wiring can be achieved by screwing down the fastening screw, the wiring operation process is simple and rapid, production efficiency is effectively improved, welding does not need to be conducted through professional technologies and equipment, and the production cost is reduced. And the processing and manufacturing difficulty and cost are low, and wiring is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a welding wire-free D-SUB electric connector. Background Art

[0002] D-SUB is commonly known as VGA (Video Graphics Adapter) interface. This is an analog signal interface with different numbers of interfaces as required. D-SUB electrical connector and connector assembly is a rectangular connector with a frequency lower than 3MHz. It has various forms and can be used for AC and DC. It is the most common input / output connector. With the development of communication technology, D-SUB electrical connector and connector assembly have been widely used in communication equipment. The interfaces of power supply, alarm, network management and fan unit of communication equipment can all use D-SUB electrical connector and connector assembly.

[0003] At present, in the prior art, multiple cable connectors of the traditional DD-SUB interface are usually connected by welding. The traditional electrical connector welding operation process is cumbersome and requires professional technology and equipment, including welding tools, solder, etc., which increases manufacturing costs and production time and is inefficient. At the same time, traditional welding points are easily affected by mechanical stress and temperature changes, causing the welding points to break or loosen, thereby affecting the reliability and stability of the connection. Utility Model Content

[0004] The utility model aims to provide a D-SUB electrical connector without soldering wires, aiming to solve the technical problem in the prior art that the production efficiency of the electrical connector is low due to the complicated soldering process.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a solder-free D-SUB electrical connector, comprising:

[0006] A shell, wherein the shell is provided with a plurality of through holes in a vertical direction, and the shell is provided with a plurality of threaded holes in a horizontal direction, and the plurality of threaded holes are connected and arranged in a one-to-one correspondence with the plurality of through holes;

[0007] A plurality of conductive terminals, each of which is inserted into the plurality of through holes in a one-to-one correspondence, and each of which comprises a wiring terminal and a connecting terminal, and a contact surface is disposed on a side of the wiring terminal facing the threaded hole; and

[0008] A plurality of fastening screws are inserted into the plurality of threaded holes one by one in correspondence, so that an external cable is inserted into one end of the through hole and the external cable is abutted against the abutting surface of the wiring terminal by the fastening screws to perform wiring.

[0009] Furthermore, the connecting end is a tubular interface, and strip-shaped gaps are vertically provided on two opposite sides of the tubular interface, so as to divide the tubular interface into two elastic tube wall parts through the strip-shaped gaps.

[0010] Furthermore, the through hole includes a coaxially arranged connecting hole, a limiting hole and a wiring hole, and the middle part of the conductive terminal protrudes and extends circumferentially to form a flange, so that the conductive terminal can be limited by cooperating with the limiting hole, the connecting end is located in the connecting hole, the wiring end is located in the wiring hole, and the wiring hole is connected to the threaded hole.

[0011] Furthermore, a cutting plane is provided on one side of the wiring terminal facing the threaded hole to form the abutting surface.

[0012] Furthermore, the shell includes an insulating upper body and an insulating lower body that are joined together, the limiting hole is arranged between the insulating upper body and the insulating lower body, the connecting hole is arranged on the insulating upper body, and the wiring hole is arranged on the insulating lower body.

[0013] Furthermore, a plurality of accommodating cavities are provided inside the insulating lower body, the upper ends of the accommodating cavities are communicated with the limiting holes, the lower ends of the accommodating cavities are open, a plurality of wiring blocks are provided in one-to-one correspondence in the plurality of accommodating cavities, and the wiring holes and the threaded holes are both provided on the wiring blocks.

[0014] Furthermore, a plurality of countersunk holes are provided on the side of the insulating lower body, and the plurality of countersunk holes are connected and arranged in a one-to-one correspondence with the plurality of threaded holes. The end cap of the fastening screw is arranged in the countersunk hole, and the end cap of the fastening screw is provided with a groove.

[0015] Furthermore, the insulating lower body includes a lower body and a tail cover that are connected to each other, and a plurality of wire holes are opened at the bottom of the tail cover. The plurality of wire holes are connected and arranged in a one-to-one correspondence with the plurality of wiring holes, and a guide slope is provided on the inner wall of one side of the wire hole to guide the external cable to be inserted between the abutment surface and the fastening screw through the guide slope.

[0016] Furthermore, a slot is provided on the side edge of the lower body, and a buckle is provided on the side edge of the tail cover, so that the lower body and the tail cover are engaged with each other through the buckle and the slot, and the tail cover is protrudingly provided with a plurality of limit blocks, and the plurality of limit blocks are inserted into the openings of the plurality of accommodating cavities one by one.

[0017] Furthermore, the shell body also includes an upper shell and a lower shell that are connected to each other, so as to form an accommodation space that passes through from top to bottom between the upper shell and the lower shell, and the insulating upper body and the insulating lower body are both accommodated in the accommodation space, and the lower end of the insulating lower body protrudes out from the accommodation space, and a snap buckle is provided at the bottom of the lower shell, and a snap groove is opened on one side of the insulating lower body, and the snap buckle is inserted into the snap groove.

[0018] It can be seen from the above technical scheme that the solder-free D-SUB electrical connector of the utility model allows the external cable to be inserted into one end of the through hole and the external cable is abutted against the wiring end of the conductive terminal by tightening the screws for wiring. Quick wiring can be achieved by tightening the screws. The wiring operation process is simple and fast, which effectively improves production efficiency. There is no need to use professional technology and equipment for welding, and the processing and manufacturing difficulty and cost are low. The external cable is tightly abutted against the abutting surface of the wiring terminal by tightening the screws, thereby enhancing the stability and reliability of the wiring structure and facilitating wiring.

[0019] In order to make the technical concept and other purposes, advantages, features and functions of the present invention more clearly understood, preferred embodiments will be specifically cited in the following specific implementation manner and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a three-dimensional diagram of a D-SUB electrical connector without solder wires provided in an embodiment of the present application;

[0022] Figure 2 is a three-dimensional diagram of a D-SUB electrical connector without solder wires provided by an embodiment of the present application from another perspective;

[0023] Figure 3 This is a front view of a D-SUB electrical connector without solder wires provided in an embodiment of the present application;

[0024] Figure 4 The embodiment of this application provides Figure 3 Sectional view of the middle section AA;

[0025] Figure 5 It is a structural schematic diagram of a D-SUB electrical connector without solder wires provided in an embodiment of the present application;

[0026] Figure 6 This is a structural exploded view of a D-SUB electrical connector without solder wires provided in an embodiment of the present application;

[0027] Figure 7 is a structural exploded view of a D-SUB electrical connector without solder wires provided in an embodiment of the present application from another perspective;

[0028] Figure 8 It is a schematic diagram of the structure of the conductive terminal and the fastening screw provided in the embodiment of the present application.

[0029] The above drawings include the following reference numerals:

[0030] 100, housing; 110, insulating upper body; 111, connecting hole; 112, limiting hole; 120, lower body; 121, slot; 122, snap-fit ​​slot; 123, accommodating cavity; 130, tail cover; 131, buckle; 132, limiting block; 133, countersunk hole; 134, wire hole; 135, guiding inclined surface; 140, upper housing; 141, upper extended edge; 142, riveted column; 150, lower housing; 151, lower extended edge; 152, fixing hole; 153, snap-fit ​​buckle; 160, accommodating space; 170, through hole;

[0031] 200, conductive terminal; 210, wiring terminal; 211, abutting surface; 220, connecting end; 221, strip-shaped notch; 222, elastic tube wall portion; 230, flange;

[0032] 300, fastening screw; 310, end cap; 311, groove;

[0033] 400, wiring block; 410, wiring hole; 420, threaded hole. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0035] Please also read Figures 1 to 8The present embodiment provides a solder-free D-SUB electrical connector, including a shell 100, a plurality of conductive terminals 200, and a plurality of fastening screws 300. The shell 100 is provided with a plurality of through holes 170 in the vertical direction, and the shell 100 is provided with a plurality of threaded holes 420 in the horizontal direction. The plurality of threaded holes 420 are connected and arranged one-to-one with the plurality of through holes 170. The plurality of conductive terminals 200 are respectively inserted into the plurality of through holes 170 in a one-to-one correspondence, and the conductive terminals 200 include wiring terminals 210 and connecting terminals 220. The connecting terminals 220 are used to be electrically connected to plugs of other matching electrical connectors. The wiring terminals 210 are provided with abutting surfaces 211 on one side facing the threaded holes 420. The plurality of fastening screws 300 are respectively inserted into the plurality of threaded holes 420 in a one-to-one correspondence, so that an external cable is inserted into one end of the through hole 170 and the external cable is abutted against the abutting surface 211 of the wiring terminal 210 by the fastening screws 300 for wiring.

[0036] It can be seen that the solder-free D-SUB electrical connector of this embodiment allows the external cable to be inserted into one end of the through hole 170 and the external cable is abutted against the wiring terminal 210 of the conductive terminal 200 by tightening the screw 300 for wiring. Quick wiring can be achieved by tightening the screw 300. The wiring operation process is simple and fast, which effectively improves production efficiency. There is no need to use professional technology and equipment for welding, and the processing and manufacturing difficulty and cost are low. By tightening the screw 300, the external cable is tightly abutted against the abutment surface 211 of the wiring terminal 210, thereby enhancing the stability and reliability of the wiring structure and facilitating wiring.

[0037] In this embodiment, if Figure 8 As shown, the connection end 220 is a tubular interface, which is made of metal material, and strip notches 221 are vertically provided on opposite sides of the tubular interface. The strip notches 221 are in the shape of a slit, so that the tubular interface is divided into two elastic tube wall parts 222 by the strip notches 221. In this way, when a plug of another connector is inserted into the tubular interface, the plug is tightly clamped by the elastic force of the two elastic tube wall parts 222, thereby improving the stability and reliability of the electrical contact and avoiding loose connection and poor electrical contact.

[0038] Specifically, if Figure 4As shown, the through hole 170 includes a coaxially arranged connecting hole 111, a limiting hole 112 and a wiring hole 410, and a flange 230 is formed on the middle part of the conductive terminal 200 protruding and extending in the circumferential direction, so that the conductive terminal 200 is axially limited by the flange 230 and the limiting hole 112. The connecting end 220 is located in the connecting hole 111, and the wiring end 210 is located in the wiring hole 410. The wiring hole 410 is connected with the threaded hole 420, wherein the outer end of the connecting hole 111 is in an outwardly expanding cone shape to facilitate another plug to be inserted into the tubular interface through the connecting hole 111.

[0039] Furthermore, if Figure 4 As shown, a cutting plane is provided on one side of the terminal 210 facing the threaded hole 420 to form a contact surface 211. The terminal 210, flange 230 and connecting end 220 of the conductive terminal 200 are an integral structure made of metal material. The contact surface 211 is a planar structure to increase the electrical contact area with the external cable to avoid poor contact and affect the use effect.

[0040] In this embodiment, if Figure 4 As shown, the housing 100 includes an insulating upper body 110 and an insulating lower body that are joined together. The insulating upper body 110 and the insulating lower body are both made of plastic material. The limiting hole 112 is set between the insulating upper body 110 and the insulating lower body. The connecting hole 111 is set on the insulating upper body 110. The wiring hole 410 is set on the insulating lower body. The aperture of the limiting hole 112 is larger than the aperture of the connecting hole 111. In this way, when assembling, first assemble the insulating upper body 110 and the insulating lower body. The lower body is separated to open the limiting hole 112, and then the connecting end 220 of the conductive terminal 200 is passed through the limiting hole 112 of the insulating upper body 110 and inserted into the connecting hole 111, and then the insulating lower body is connected to the insulating upper body 110 accordingly, and the wiring end 210 of the conductive terminal 200 is inserted into the wiring hole 410 on the insulating lower body, so that the conductive terminal 200 is installed in the through hole 170 of the shell 100, which has a simple structure, convenient assembly, and is stable and reliable.

[0041] Specifically, if Figure 6 and Figure 7 As shown, a plurality of accommodating cavities 123 are provided inside the insulating lower body, the upper end of the accommodating cavity 123 is communicated with the limiting hole 112, and the lower end of the accommodating cavity 123 is open. A plurality of wiring blocks 400 are provided in correspondence with each other in the plurality of accommodating cavities 123, and the wiring holes 410 and the threaded holes 420 are both provided on the wiring blocks 400 so that the wiring blocks 400 can be installed in the accommodating cavity 123 through the opening of the accommodating cavity 123. In this way, the structure is simplified to separate the cavity and hole structure inside the shell 100, thereby reducing the difficulty of the processing technology and the manufacturing cost.

[0042] Furthermore, if Figures 1 to 4 As shown, a plurality of countersunk holes 133 are provided on the side of the insulating lower body, and the plurality of countersunk holes 133 are connected and arranged in a one-to-one correspondence with the plurality of threaded holes 420. The end cap 310 of the fastening screw 300 is arranged in the countersunk hole 133, and the end cap 310 of the fastening screw 300 is provided with a groove 311, and the groove 311 is a slot structure. In this way, the end cap 310 of the fastening screw 300 is hidden in the countersunk hole 133, thereby improving the flatness and safety of the outer surface of the product, so that the fastening screw 300 can be turned by inserting a tool into the groove 311 to perform wiring.

[0043] Furthermore, if Figure 4 and Figure 5 As shown, the insulating lower body includes a lower body 120 and a tail cover 130 that are connected to each other. A plurality of wire holes 134 are opened at the bottom of the tail cover 130. The plurality of wire holes 134 are connected and arranged in a one-to-one correspondence with the plurality of wiring holes 410, and a guide slope 135 is provided on the inner wall of one side of the wire hole 134 to guide the external cable to be inserted between the abutment surface 211 and the fastening screw 300 through the guide slope 135. In this way, the external cable is ensured to be inserted between the abutment surface 211 and the fastening screw 300 through the guiding effect of the guide slope 135, and then the fastening screw 300 is screwed to tightly abut the external cable against the abutment surface 211 of the conductive terminal 200 for wiring, thereby further improving the practicality and convenience of wiring.

[0044] Preferably, if Figures 1 to 4 As shown, a slot 121 is provided on the side edge of the lower body 120, and a buckle 131 is provided on the side edge of the tail cover 130, so that the lower body 120 and the tail cover 130 can be buckled and connected by matching the buckle 131 with the slot 121, and the tail cover 130 is protrudingly provided with a plurality of limit blocks 132, and the plurality of limit blocks 132 are inserted into the openings of the plurality of accommodating cavities 123 one by one. In this way, the opening at the bottom of the accommodating cavity 123 is blocked by the limit block 132, so that the wiring block 400 is installed in the accommodating cavity 123, and the cross-sectional shapes of the accommodating cavity 123, the wiring block 400 and the limit block 132 are all rectangular, and the wire hole 134 passes through the limit block 132 and is connected to the wiring hole 410 of the wiring block 400.

[0045] Among them, Figures 1 to 4 As shown, a plurality of conductive terminals 200 and a plurality of fastening screws 300 are arranged in two corresponding groups, and the two groups of fastening screws 300 are respectively arranged on opposite sides of the shell 100. Specifically, the cross-sectional shape of the tail cover 130 is roughly a U-shaped structure, and two groups of countersunk holes 133 are respectively opened on the opposite side walls of the tail cover 130, and the two groups of fastening screws 300 are respectively arranged in the two groups of countersunk holes 133.

[0046] In this embodiment, if Figure 6 and Figure 7 As shown, the housing 100 further includes an upper housing 140 and a lower housing 150 which are connected to each other, so as to form an accommodation space 160 which is connected from top to bottom between the upper housing 140 and the lower housing 150. The insulating upper body 110 and the insulating lower body are both accommodated in the accommodation space 160, and the lower end of the insulating lower body protrudes out from the accommodation space 160. A snap-fit ​​buckle 153 is arranged at the bottom of the lower housing 150, and a snap-fit ​​groove 122 is opened on one side of the insulating lower body. The snap-fit ​​buckle 153 is inserted into the snap-fit ​​groove 122. The insulating lower body is limited by the cooperation of the snap buckle 153 and the snap groove 122, and the side wall step of the insulating upper body 110 is limited by the inner wall of the accommodating space, wherein the connecting hole 111 of the through hole 170 is exposed through the through opening at the upper end of the accommodating space, so as to facilitate the electrical connection of the connecting end 220 at the upper end of the conductive terminal 200, and the lower end of the insulating lower body protrudes from the through opening at the lower end of the accommodating space 160, so that the wiring terminal 210 at the lower end of the conductive terminal 200 can be connected.

[0047] Specifically, if Figure 6 and Figure 7 As shown, the outer peripheral side edge of the upper shell 140 protrudes and extends to form an upper extension 141, and riveting columns 142 are provided on both sides of the upper extension 141. The riveting columns 142 are tubular wall structures made of metal materials. The outer peripheral side edge of the lower shell 150 protrudes and extends to form a lower extension 151, and fixing holes 152 are opened on both sides of the lower extension 151, so that the upper shell 140 and the lower shell 150 are joined and riveted by inserting the riveting columns 142 into the fixing holes 152 to achieve fixed connection.

[0048] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0049] The solder-free D-SUB electrical connector of the present invention allows an external cable to be inserted into one end of the through hole 170 and the external cable is abutted against the wiring terminal 210 of the conductive terminal 200 by tightening the screw 300 for wiring. Quick wiring can be achieved by tightening the screw 300. The wiring operation process is simple and fast, which effectively improves production efficiency. There is no need to use professional technology and equipment for welding, and the processing and manufacturing difficulty and cost are low. In addition, the external cable is tightly abutted against the abutment surface 211 of the wiring terminal 210 by tightening the screw 300, thereby enhancing the stability and reliability of the wiring structure.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0052] It should be noted that, in the description of the present application, unless otherwise clearly specified and limited, the terms "set, connect, connect, install" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, longitudinal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; in addition, the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. In the description of the present utility model, unless otherwise specified, the meaning of "multiple" refers to two or more.

[0054] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A D-SUB electrical connector without solder wires, characterized in that: include: A shell (100), wherein the shell (100) is provided with a plurality of through holes (170) in a vertical direction, and the shell (100) is provided with a plurality of threaded holes (420) in a horizontal direction, and the plurality of threaded holes (420) are connected and arranged in a one-to-one correspondence with the plurality of through holes (170); A plurality of conductive terminals (200), the plurality of conductive terminals (200) being inserted into the plurality of through holes (170) in a one-to-one correspondence, and the conductive terminals (200) comprising a wiring terminal (210) and a connecting terminal (220), and a contact surface (211) being provided on a side of the wiring terminal (210) facing the threaded hole (420); and A plurality of fastening screws (300) are respectively inserted into the plurality of threaded holes (420) in a one-to-one correspondence, so that an external cable is inserted into one end of the through hole (170) and the external cable is abutted against the abutting surface (211) of the wiring terminal (210) by the fastening screws (300) to perform wiring.

2. The solderless D-SUB electrical connector according to claim 1, characterized in that: The connecting end (220) is a tubular interface, and strip-shaped notches (221) are provided vertically on opposite sides of the tubular interface, so as to divide the tubular interface into two elastic tube wall parts (222) through the strip-shaped notches (221).

3. The solder-free D-SUB electrical connector according to claim 1, characterized in that: The through hole (170) comprises a connecting hole (111), a limiting hole (112) and a wiring hole (410); a flange (230) is formed on the middle part of the conductive terminal (200) and extends in a circumferential direction so as to limit the conductive terminal (200) by cooperating with the limiting hole (112); the connecting end (220) is located in the connecting hole (111); the wiring end (210) is located in the wiring hole (410); and the wiring hole (410) is communicated with the threaded hole (420).

4. The solderless D-SUB electrical connector according to claim 1, characterized in that: A cutting plane is provided on one side of the wiring terminal (210) facing the threaded hole (420) to form the abutment surface (211).

5. The solderless D-SUB electrical connector according to claim 3, characterized in that: The shell (100) comprises an insulating upper body (110) and an insulating lower body which are joined together, the limiting hole (112) is arranged between the insulating upper body (110) and the insulating lower body, the connecting hole (111) is arranged on the insulating upper body (110), and the wiring hole (410) is arranged on the insulating lower body.

6. The solderless D-SUB electrical connector according to claim 5, characterized in that: A plurality of accommodating cavities (123) are provided inside the insulating lower body, the upper ends of the accommodating cavities (123) are communicated with the limiting holes (112), and the lower ends of the accommodating cavities (123) are open. A plurality of wiring blocks (400) are provided in a one-to-one correspondence in the plurality of accommodating cavities (123), and the wiring holes (410) and the threaded holes (420) are both provided on the wiring blocks (400).

7. The solderless D-SUB electrical connector according to claim 6, characterized in that: A plurality of countersunk holes (133) are provided on the side surface of the insulating lower body, and the plurality of countersunk holes (133) are connected and arranged in a one-to-one correspondence with the plurality of threaded holes (420); the end cap (310) of the fastening screw (300) is arranged in the countersunk hole (133), and the end cap (310) of the fastening screw (300) is provided with a groove (311).

8. The solderless D-SUB electrical connector according to claim 6, characterized in that: The insulating lower body comprises a lower body (120) and a tail cover (130) which are connected to each other. A plurality of wire holes (134) are provided at the bottom of the tail cover (130). The plurality of wire holes (134) are connected and arranged in a one-to-one correspondence with the plurality of wiring holes (410). A guide slope (135) is provided on one inner wall of the wire hole (134) so ​​as to guide an external cable to be inserted between the abutting surface (211) and the fastening screw (300) through the guide slope (135).

9. The solder-free D-SUB electrical connector according to claim 8, characterized in that: A slot (121) is provided on the side edge of the lower body (120), and a buckle (131) is provided on the side edge of the tail cover (130), so that the lower body (120) and the tail cover (130) are engaged with the slot (121) through the buckle (131) and are thus snap-fitted and connected, and a plurality of limit blocks (132) are protrudingly provided on the tail cover (130), and the plurality of limit blocks (132) are accommodated in the openings of the plurality of accommodating cavities (123) in a one-to-one correspondence.

10. The solder-free D-SUB electrical connector according to claim 5, characterized in that: The shell (100) further comprises an upper shell (140) and a lower shell (150) which are joined to each other, so as to form a vertically through-going accommodation space (160) between the upper shell (140) and the lower shell (150); the insulating upper body (110) and the insulating lower body are both accommodated in the accommodation space (160), and the lower end of the insulating lower body protrudes out from the accommodation space (160); a snap-fit ​​buckle (153) is arranged at the bottom of the lower shell (150); a snap-fit ​​groove (122) is provided on one side of the insulating lower body, and the snap-fit ​​buckle (153) is inserted into the snap-fit ​​groove (122).

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