A small or zero insertion force electrical connector socket

Abstract

The present invention discloses an electrical connector socket with small or zero insertion force, which includes an insulating socket body, a conductive jack post, a clamping sleeve, a clamping sleeve base body, a compression spring, a pressure plate and a control screw. The insertion end of the jack post is provided with a jack piece. The jack post passes through the socket through-hole of the socket body. The pressure plate is placed in the pressure plate inner cavity of the socket body. The control screw passes through the socket screw hole and can be placed in the pressure plate inner cavity. The clamping sleeve base body is placed in the socket body and generates an upward stress through the compression spring. The clamping sleeve is installed in the base body through-hole of the clamping sleeve base body. A section of clamping sleeve tapered hole is provided at the lower section of the clamping sleeve through-hole of the clamping sleeve. The jack piece passes through the corresponding base body through-hole and clamping sleeve through-hole. The present invention realizes the function of small or zero insertion force on the premise of not affecting the good electrical conductivity of the jack post and the pin, significantly improves the electrical connection reliability of the electrical connector, reduces the contact heating of the connector, and improves the service life of the electrical connector.

Description

Technical Field

[0001] The present invention relates to a multi-core electrical connector socket, and more particularly to an electrical connector socket with small or zero insertion and extraction force. Background Art

[0002] An electrical connector includes a plug and a socket. Usually, pins are installed in the plug, and jack posts are installed in the socket. The plug is inserted into the jacks of the jack posts to achieve electrical connection between the plug and the socket. In order to achieve good electrical connection between the pins and the jack posts and facilitate the insertion and extraction of the pins, the insertion end of the jack post is provided with notches to form a plurality of jack pieces with a circular arc-shaped radial cross-section. Through closing processing, stress is formed by the mutual closing of two or more jack pieces. A flared mouth is provided at the end between two or more jack pieces to achieve the guiding of the insertion of the pins. When the pins are inserted into the flared mouth between two or more jack pieces, the jack pieces tightly hold the surface of the pin shaft with the elasticity of the material itself, constituting a positive pressure. This positive pressure provided only by the elasticity of the material enables good electrical connection between the pins and the jack posts on the one hand, and on the other hand, this positive pressure will also form an insertion and extraction force, that is, the frictional force with the jack pieces that needs to be overcome when the pins are inserted and extracted. Therefore, inserting and extracting with an insertion and extraction force is a basic attribute of an electrical connector.

[0003] Since inserting and extracting with an insertion and extraction force is the basic normal state of an electrical connector, users generally do not think about improving it. However, in actual operation, when users use electrical connectors, especially multi-core electrical connectors (i.e., electrical connectors with multiple pins and jack posts), they often encounter the situation that the insertion and extraction force is too large and it is very difficult to insert or extract. However, in order to avoid poor contact, it is not possible to simply reduce the elasticity of the jack pieces. Therefore, the good electrical conductivity and easy insertion and extraction operation of multi-core electrical connectors are a pair of contradictions.

[0004] In addition, even if the insertion and extraction force problem is not considered, it is very difficult to maintain the good electrical conductivity of the electrical connector for a long time by using the elasticity of the jack pieces themselves. According to relevant data statistics, the failure of electrical connectors accounts for about 40% - 50% of the total number of failure cases of electronic components in the system. The decline in the electrical conductivity of electrical connectors is one of the main reasons for the failure of most electronic devices. Generally speaking, there are three normal failure modes of electrical connectors: open circuit (probability is 61%), poor contact (instantaneous open circuit, probability is 23%), and short circuit (probability is 16%). Open circuit generally refers to instantaneous break. The first two are both related to the instability of the contact positive pressure. Among them, the connection point or contact interface between the pin and the jack post usually fails because the contact positive pressure provided only by the elasticity of the material is insufficient or unstable, resulting in a short service life of the electrical connector. Summary of the Invention

[0005] The object of the present invention is to provide a small insertion and extraction force or zero insertion and extraction force electrical connector socket that is easy to plug and unplug, has good electrical conductivity, and has a long service life in order to solve the above problems.

[0006] The present invention achieves the above object through the following technical solutions:

[0007] A small plug-in force or zero plug-in force electrical connector socket, comprising an insulating socket body and a conductive socket column, the plug-in end of the socket column is provided with a notch to form a plurality of socket plates with a radial cross-section of a circular arc, a plurality of socket through holes are provided in the socket body and the axial direction of the socket through holes is vertical, a plurality of vertical socket columns respectively pass through the plurality of socket through holes and the socket plates are located at the lower end, the small plug-in force or zero plug-in force electrical connector socket also comprises a clamping sleeve, a clamping sleeve base, a compression spring, a pressure plate and a control screw, a pressure plate inner cavity is provided in the socket body and all the socket through holes pass through the pressure plate inner cavity, the transverse pressure plate is placed in the pressure plate inner cavity The socket body is provided with a plurality of vertical socket screw holes at a position above the inner cavity of the pressure plate, and the lower ends of the screw rods of the plurality of control screws respectively pass through the socket screw holes from top to bottom and can be placed in the inner cavity of the pressure plate. A convex ring groove which increases toward the circumference is provided in the middle part of a section of the socket through hole located above the inner cavity of the pressure plate, and a convex ring which protrudes toward the circumference is provided at a position corresponding to the convex ring groove on the jack column, and the convex ring is placed in the convex ring groove. The pressure plate is provided with a plurality of vertical pressure plate through holes corresponding to the socket through holes, and the jack column passes through the corresponding pressure plate through holes. The socket through hole has a section whose diameter is enlarged below the inner cavity of the pressure plate to form a socket large diameter hole, and the lower end of the socket large diameter hole has a reduced diameter to form a socket small diameter hole. The columnar and vertical clamping sleeve base is provided with a vertical base through hole. The outer wall of the lower section of the clamping sleeve base is thinned to form a base thin-wall section. The plurality of clamping sleeve bases are respectively placed in the plurality of corresponding socket large diameter holes and their upper ends are placed in the inner cavity of the pressure plate, and their lower ends pass through the corresponding socket small diameter holes. The plurality of compression springs are respectively sleeved on the outside of the plurality of corresponding base thin-wall sections and are located in the plurality of corresponding socket large diameter holes. The upper ends of the compression springs are connected to the corresponding The base annular outer step at the upper end of the thin-walled section of the base contacts, the lower end of the compression spring contacts the corresponding socket annular inner step at the lower end of the large-diameter hole of the socket, and the plurality of clamping sleeves are respectively installed in the lower sections of the corresponding base through holes, the clamping sleeve is provided with a vertical clamping sleeve through hole, the aperture of the clamping sleeve through hole is larger than the outer diameter of the jack column, the lower section of the clamping sleeve through hole is provided with a clamping sleeve tapered hole with a larger upper portion and a smaller lower portion, the aperture of the lower end of the clamping sleeve tapered hole is smaller than the outer diameter of the cylinder formed by the plurality of jack sheets on one jack column, and the plurality of jack sheets on one jack column pass through the corresponding base through hole and the clamping sleeve through hole. The jack sheet can be closed or not closed, if closed, the jack sheet has stress in the inward direction, the stress can be smaller than the stress of the traditional jack sheet, thereby achieving a small plug-in and pull-out force effect, if not closed, the jack sheet has no stress in the inward direction, thereby achieving a zero plug-in and pull-out force effect.

[0008] Preferably, in order to facilitate the installation of the clamping sleeve in the clamping sleeve base body and achieve vertical positioning, a notch is provided in the upper section of the clamping sleeve to form a plurality of clamping pieces. The upper end of each clamping piece protrudes outwardly to form an outer convex step. The aperture of the lower section of the base body through hole is reduced to form a base body small diameter hole. The clamping sleeve is placed in the corresponding base body small diameter hole, and the outer convex step is placed on the base body annular inner step at the upper end of the corresponding base body small diameter hole.

[0009] Preferably, in order to achieve better vertical positioning of the clamping sleeve and maintain aesthetics, a sleeve cap with a larger outer diameter is provided at the lower end of the clamping sleeve. The outer diameter of the sleeve cap is larger than the aperture of the base body small diameter hole and smaller than the aperture of the socket small diameter hole. The sleeve cap is placed outside the corresponding base body small diameter hole and inside the corresponding socket small diameter hole.

[0010] Preferably, in order to achieve a better clamping effect on the jacking piece through the clamping sleeve, the angle between the hole wall of the conical hole of the clamping sleeve and the vertical direction is 15° - 45°.

[0011] Preferably, in order to facilitate the insertion of the pin, a section of cylindrical hole of the clamping sleeve is connected below the conical hole of the clamping sleeve. The aperture of the cylindrical hole of the clamping sleeve is the same as the aperture of the lower end of the conical hole of the clamping sleeve.

[0012] Preferably, in order to improve the smoothness of the clamping and loosening operations of the clamping sleeve on the jacking piece, a smooth transition is provided between the conical hole of the clamping sleeve and the upper through hole of the clamping sleeve and the lower cylindrical hole of the clamping sleeve.

[0013] Preferably, in order to further improve the smoothness of the clamping and loosening operations of the clamping sleeve on the jacking piece, a conical surface matching the hole wall of the conical hole of the clamping sleeve is provided on the outer wall of the lower end of the jacking piece.

[0014] Preferably, in order to facilitate the processing and assembly of the socket body, the socket body includes a first socket plate, a second socket plate, a third socket plate, and a fourth socket plate that are arranged horizontally and sequentially from top to bottom and are connected to each other. The third socket plate is provided with a vertical central through hole to form the pressing plate inner cavity. The first socket plate is provided with a plurality of corresponding vertical screw holes, and the second socket plate is provided with a plurality of corresponding vertical through holes to form a plurality of socket screw holes. The first socket plate and the second socket plate are respectively provided with a plurality of corresponding vertical through holes to form the upper section of a plurality of socket through holes. The aperture of the lower section of the vertical through hole of the first socket plate is increased to form the convex ring groove. The fourth socket plate is provided with a plurality of corresponding vertical through holes to form a plurality of socket large diameter holes and a plurality of socket small diameter holes.

[0015] Preferably, in order to quickly and stably connect the socket boards, the first socket board, the second socket board, the third socket board and the fourth socket board are connected by a plurality of vertical rivets located near the edge.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a socket large diameter hole in the socket body and installs a clamping sleeve base, and generates an upward elastic force on the clamping sleeve base through a compression spring, so that the clamping sleeve base drives the clamping sleeve to maintain an upward stress, and the hole wall of the tapered hole of the clamping sleeve pushes the jack piece toward the center to realize the clamping function, and the clamping function enables the jack piece to clamp the plug pin to maintain good conductive performance; a pressure plate inner cavity is provided in the socket body and the pressure plate is installed, and before the plug pin is inserted, the pressure plate is pushed downward by a control screw, and the pressure plate pushes the clamping sleeve base and the clamping sleeve to move downward, and the tapered hole of the clamping sleeve moves downward to restore the plug pin to a natural state. At this time, the plug pin is inserted, and the pressure on the plug pin by the plug pin is small (when the plug pin is closed) or no pressure (when the plug pin is not closed), and the friction is small or no friction. After the plug pin is inserted into place, the control screw is rotated in the opposite direction, and the pressure plate moves upward. Under the elastic force of the compression spring, the clamping effect of the jack plate on the pin is achieved. Similarly, before pulling out the pin, the pressure plate is pushed downward by the control screw until the jack plate returns to its natural state. At this time, there is little or no friction when pulling out the pin. In this way, small plugging and unplugging force or zero plugging and unplugging force function is achieved without affecting the good conductivity of the jack column and the pin. It is not only convenient for plugging and unplugging operations, but also no longer relies solely on the elasticity of the jack plate itself to achieve the clamping function and good conductivity of the pin. For the structure of the jack plate closing, the double contact positive pressure provided by the compression spring and the elasticity of the jack plate's own material significantly reduces the contact resistance and achieves insertion or extraction with small plugging and unplugging force. The present invention significantly improves the electrical connection reliability of the electrical connector, reduces the contact resistance, improves the current conduction capacity, reduces the contact heat of the connector, and improves the service life of the electrical connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front cross-sectional view of the electrical connector socket with low insertion force or zero insertion force according to the present invention;

[0019] Figure 2 It is a front cross-sectional view of the electrical connector socket with low insertion force or zero insertion force of the present invention after removing the jack column, the clamping sleeve, the clamping sleeve base, and the compression spring;

[0020] Figure 3 yes Figure 1 A magnified view of "A" in the figure;

[0021] Figure 4is the front view cross-sectional view of the clamping sleeve base of the small insertion force or zero insertion force electrical connector socket according to the present invention, and the scale in the figure is greater than Figure 1 and less than Figure 3 ;

[0022] Figure 5 is the front view cross-sectional view of the clamping sleeve of the small insertion force or zero insertion force electrical connector socket according to the present invention, and the scale in the figure is greater than Figure 4 ;

[0023] Figure 6 is the partial perspective view of the jack post of the small insertion force or zero insertion force electrical connector socket according to the present invention. Detailed implementation mode

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Such as Figures 1 - 6As shown, the electrical connector socket with low insertion and extraction force or zero insertion and extraction force of the present invention comprises an insulating socket body, a conductive socket column 1, a clamping sleeve 23, a clamping sleeve base 3, a compression spring 17, a pressure plate 4 and a control screw 5. The plug-in end of the socket column 1 is provided with a slot to form a plurality of (generally two) socket pieces 21 with a radial arc-shaped cross-section. A plurality of socket through holes 13 are provided in the socket body and the axial direction of the socket through holes 13 is vertical. A plurality of vertical socket columns 1 respectively pass through a plurality of socket through holes 13 and the socket pieces 21 are located at the lower end. A pressure plate inner cavity 8 is provided in the socket body and all the socket through holes 13 pass through the pressure plate inner cavity 8. The transverse pressure plate 4 is placed in the pressure plate inner cavity 8. The vertical height is smaller than the vertical height of the pressure plate inner cavity 8. A plurality of vertical socket screw holes 6 are provided on the socket body at a position above the pressure plate inner cavity 8. The socket screw hole 6 can be a screw hole in its entirety, or a screw hole in the upper section and a through hole in the lower section. The lower ends of the screw rods of a plurality of control screws 5 pass through the socket screw holes 6 from top to bottom and can be placed in the pressure plate inner cavity 8. A convex annular groove 14 which increases in the circumferential direction is provided in the middle of a section of the socket through hole 13 which is located above the pressure plate inner cavity 8. A convex ring 2 which protrudes in the circumferential direction is provided at a position corresponding to the convex annular groove 14 on the jack column 1. The convex ring 2 is placed in the convex annular groove 14. A plurality of vertical pressure plate through holes corresponding to the socket through hole 13 are provided on the pressure plate 4. The jack column 1 passes through Through the corresponding pressure plate through hole, the diameter of a section of the socket through hole 13 located below the pressure plate inner cavity 8 is increased to form a socket large diameter hole 15, and the lower end diameter of the socket large diameter hole 15 is reduced to form a socket small diameter hole 16. The columnar and vertical clamping sleeve base 3 is provided with a vertical base through hole 19, and the outer wall of the lower section of the clamping sleeve base 3 is thinned to form a base thin-walled section 18. A plurality of clamping sleeve bases 3 are respectively placed in the corresponding socket large diameter holes 15 and their upper ends are placed in the pressure plate inner cavity 8, and their lower ends pass through the corresponding socket small diameter holes 16. A plurality of spiral compression springs 17 are respectively sleeved on the outside of the corresponding base thin-walled sections 18 and are located in the corresponding socket large diameter holes 15. The upper ends of the compression springs 17 are connected to the corresponding The corresponding base thin-walled section 18 is in contact with the base annular outer step 27 at the upper end, and the lower end of the compression spring 17 is in contact with the corresponding socket annular inner step at the lower end of the socket large-diameter hole 15. A plurality of clamping sleeves 23 are respectively installed in the lower sections of the corresponding base through holes 19. The clamping sleeve 23 is provided with a vertical clamping sleeve through hole 30. The aperture of the clamping sleeve through hole 30 is larger than the outer diameter of the jack column 1. The lower section of the clamping sleeve through hole 30 is provided with a clamping sleeve tapered hole 31 which is larger at the top and smaller at the bottom. The aperture of the lower end of the clamping sleeve tapered hole 31 is smaller than the outer diameter of the cylinder formed by the multiple jack sheets 21 on a jack column 1. The multiple jack sheets 21 on a jack column 1 pass through the corresponding base through holes 19 and the clamping sleeve through holes 30.

[0026] like Figures 1 - 6As shown in the figure, the present invention also discloses the following various more optimized specific structures. According to actual needs, the above structure can be superimposed and combined with one or more of the following structures to form a more optimized technical solution.

[0027] To facilitate the installation of the clamping sleeve 23 in the clamping sleeve base 3 and achieve vertical positioning, a notch is provided in the upper section of the clamping sleeve 23 to form a plurality of clamping pieces 22. The upper end of each clamping piece 22 protrudes outwardly to form an outer convex step 20. The diameter of the lower section of the base through hole 19 is reduced to form a base small diameter hole 29. The clamping sleeve 23 is placed in the corresponding base small diameter hole 29, and the outer convex step 20 is placed on the base annular inner step 28 at the upper end of the corresponding base small diameter hole 29. During assembly, through the material elasticity of the clamping sleeve 23 itself, the clamping sleeve is compressed and installed in place from bottom to top. That is, after the outer convex step 20 passes over the base annular inner step 28, the outer convex step 20 snaps and hangs, and is assembled with the clamping sleeve base 3 into a whole.

[0028] To achieve better vertical positioning of the clamping sleeve 23 and maintain aesthetics, a sleeve cap 26 with a larger outer diameter is provided at the lower end of the clamping sleeve 23. The outer diameter of the sleeve cap 26 is larger than the diameter of the base small diameter hole 29 and smaller than the diameter of the socket small diameter hole 16. The sleeve cap 26 is placed outside the corresponding base small diameter hole 29 and inside the corresponding socket small diameter hole 16.

[0029] To achieve a better clamping effect on the jacking piece 21 through the clamping sleeve 23, the angle between the hole wall 24 of the conical hole 31 of the clamping sleeve and the vertical direction is 15° - 45°, preferably 30°.

[0030] To facilitate the insertion of the pin, a section of cylindrical hole 25 of the clamping sleeve is connected below the conical hole 31 of the clamping sleeve. The diameter of the cylindrical hole 25 of the clamping sleeve is the same as the diameter of the lower end of the conical hole 31 of the clamping sleeve.

[0031] To improve the smoothness of the clamping and loosening operations of the clamping sleeve 23 on the jacking piece 21, both the conical hole 31 of the clamping sleeve and the upper clamping sleeve through hole 30 and the lower cylindrical hole 25 of the clamping sleeve have smooth transitions.

[0032] To further improve the smoothness of the clamping and loosening operations of the clamping sleeve 23 on the jacking piece 21, a conical surface 32 matching the hole wall 24 of the conical hole 31 of the clamping sleeve is provided on the outer wall of the lower end of the jacking piece 21.

[0033] In order to facilitate the processing and assembly of the socket body, the socket body includes a first socket plate 9, a second socket plate 10, a third socket plate 11 and a fourth socket plate 12 which are arranged horizontally and in sequence from top to bottom and are interconnected. The third socket plate 11 is provided with a vertical central through hole and forms a pressure plate inner cavity 8. The first socket plate 9 is provided with a plurality of corresponding vertical screw holes and the second socket plate 10 is provided with a plurality of corresponding vertical through holes to form a plurality of socket screw holes 6. The first socket plate 9 and the second socket plate 10 are respectively provided with a plurality of corresponding vertical through holes to form the upper sections of a plurality of socket through holes 13. The aperture of the lower section of the vertical through hole of the first socket plate 9 is enlarged to form a convex annular groove 14. The fourth socket plate 12 is provided with a plurality of corresponding vertical through holes to form a plurality of socket large-diameter holes 15 and a plurality of socket small-diameter holes 16.

[0034] In order to quickly and stably connect the socket boards, the first socket board 9, the second socket board 10, the third socket board 11 and the fourth socket board 12 are connected by a plurality of vertical rivets 7 located near the edge.

[0035] like Figures 1 - 5 As shown, when used, the upper end of the jack column 1 is welded to the wire and used in conjunction with the plug; when connecting the socket and the plug, first rotate the control screw 5 downward to push the pressure plate 4, the clamping sleeve base 3 and the clamping sleeve 23 downward, and the clamping sleeve tapered hole 31 moves downward so that the jack piece 21 is no longer subjected to the pressure of the hole wall 24 of the tapered hole 31 of the tight sleeve and restores to a natural state. At this time, multiple pins of the plug are correspondingly inserted into the jack pieces 21 of multiple jack columns 1. The pins are subjected to less pressure from the jack piece 21 (when the jack piece 21 itself is closed) or no pressure (when the jack piece 21 itself is not closed), and the friction is small or no friction. After being inserted into place, the control screw 5 is rotated in the opposite direction. Under the elastic force of the compression spring 17, the pressure plate 4 moves upward, and the clamping sleeve tapered hole 31 moves upward so that its hole wall 24 presses against the jack piece 21. The inner side is squeezed to realize the clamping effect of the jack plate 21 on the pin, and the clamping power is provided by the compression spring 17, so it has the characteristics of stable clamping and relatively long-lasting; before pulling out the pin, first rotate the control screw 5 downward until the jack plate 21 returns to its natural state. At this time, the friction for pulling out the pin is small or there is no friction, so that the small plugging and unplugging force or zero plugging and unplugging force function can be achieved without affecting the good conductive performance of the jack column 1 and the pin, which is not only convenient for plugging and unplugging operations, but also no longer relies solely on the elasticity of the jack plate 21 itself to realize the clamping function and good conductive function of the pin. For the structure of the closed end of the jack plate 21, the double contact positive pressure provided by the compression spring 17 and the material elasticity of the jack plate 21 itself significantly reduces the contact resistance, and realizes insertion or extraction with a small plugging and unplugging force, thereby significantly improving the electrical connection reliability of the electrical connector.

[0036] Description: The small insertion force or zero insertion force electrical connector socket described in the present invention can be square, circular or other required shapes, and the number and arrangement of the jack posts 1 are determined according to actual needs. In practical applications, the small insertion force or zero insertion force electrical connector socket described in the present invention can be directly applied, and the stable connection between the pins of the plug and the jack posts 1 can be used in relatively static application scenarios; or a fixing structure for fixedly connecting with the plug can be added to the socket body, so that it can be reliably applied in a vibrating environment. This fixing structure is a conventional structure adopted in the prior art of electrical connectors, so it will not be specifically described in the present invention.

[0037] The above embodiments are only preferred embodiments of the present invention and do not limit the technical solutions of the present invention. Any technical solutions that can be achieved on the basis of the above embodiments without creative labor shall be regarded as falling within the scope of the patent rights of the present invention.

Claims

1. An electrical connector socket with small or zero insertion force, comprising an insulating socket body and conductive jack posts. A notch is provided at the insertion end of the jack posts to form a plurality of jack pieces with circular-arc-shaped radial cross-sections. A plurality of socket through-holes are provided in the socket body, and the axial direction of the socket through-holes is vertical. A plurality of vertical jack posts respectively pass through the plurality of socket through-holes, and the jack pieces are located at the lower end. It is characterized in that: The small insertion force or zero insertion force electrical connector socket further includes a clamping sleeve, a clamping sleeve base body, a compression spring, a pressing plate, and a control screw. A pressing plate inner cavity is provided in the socket body, and all the socket through holes pass through the pressing plate inner cavity. The horizontal pressing plate is placed in the pressing plate inner cavity. The vertical height of the pressing plate is less than the vertical height of the pressing plate inner cavity. A plurality of vertical socket screw holes are provided at a position above the pressing plate inner cavity on the socket body. The lower ends of the screw rods of the plurality of control screws respectively pass through the socket screw holes from top to bottom and can be placed in the pressing plate inner cavity. A convex ring groove that increases in the peripheral direction is provided in the middle of a section of the socket through hole above the pressing plate inner cavity. A convex ring that protrudes in the peripheral direction is provided at a position on the jack post corresponding to the convex ring groove. The convex ring is placed in the convex ring groove. A plurality of vertical pressing plate through holes corresponding to the socket through holes are provided on the pressing plate. The jack post passes through the corresponding pressing plate through hole. The diameter of a section of the socket through hole below the pressing plate inner cavity increases to form a socket large diameter hole, and the diameter of the lower end of the socket large diameter hole decreases to form a socket small diameter hole. The columnar and vertical clamping sleeve base body is provided with a vertical base body through hole. The outer wall of the lower section of the clamping sleeve base body is thinned to form a base body thin wall section. A plurality of clamping sleeve base bodies are respectively placed in a plurality of corresponding socket large diameter holes, and their upper ends are placed in the pressing plate inner cavity, and their lower ends pass through the corresponding socket small diameter holes. A plurality of compression springs are respectively sleeved outside a plurality of corresponding base body thin wall sections and are located in a plurality of corresponding socket large diameter holes. The upper end of the compression spring contacts the base body annular outer step at the upper end of the corresponding base body thin wall section, and the lower end of the compression spring contacts the socket annular inner step at the lower end of the corresponding socket large diameter hole. A plurality of clamping sleeves are respectively installed in the lower section of a plurality of corresponding base body through holes. The clamping sleeve is provided with a vertical clamping sleeve through hole. The diameter of the clamping sleeve through hole is larger than the outer diameter of the jack post. A section of the clamping sleeve through hole at the lower section has a clamping sleeve tapered hole that is large at the top and small at the bottom. The diameter of the lower end of the clamping sleeve tapered hole is smaller than the outer diameter of a cylinder formed by enclosing a plurality of jack pieces on one jack post. A plurality of jack pieces on one jack post pass through the corresponding base body through hole and the clamping sleeve through hole.

2. The electrical connector socket with small or zero insertion force according to claim 1, characterized in that: A notch is provided in the upper section of the clamping sleeve to form a plurality of clamping pieces. The upper end of each clamping piece protrudes outward in the peripheral direction to form an outer convex step. The diameter of the lower section of the base body through hole decreases to form a base body small diameter hole. The clamping sleeve is placed in the corresponding base body small diameter hole, and the outer convex step is placed on the base body annular inner step at the upper end of the corresponding base body small diameter hole.

3. The electrical connector socket with small or zero insertion force according to claim 2, characterized in that: The lower end of the clamping sleeve is provided with a sleeve cap with a larger outer diameter. The outer diameter of the sleeve cap is larger than the diameter of the base body small diameter hole and smaller than the diameter of the socket small diameter hole. The sleeve cap is placed outside the corresponding base body small diameter hole and inside the corresponding socket small diameter hole.

4. The electrical connector socket with small or zero insertion force according to claim 1, 2 or 3, characterized in that: The included angle between the hole wall of the clamping sleeve tapered hole and the vertical direction is 15° - 45°.

5. The electrical connector socket with small or zero insertion force according to claim 4, characterized in that: Below the tapered hole of the clamping sleeve is connected with a cylindrical hole of the clamping sleeve, and the aperture of the cylindrical hole of the clamping sleeve is the same as the aperture of the lower end of the tapered hole of the clamping sleeve.

6. The female electrical connector socket with small or zero insertion force according to claim 5, characterized in that: There is a smooth transition between the tapered hole of the clamping sleeve and the through hole of the clamping sleeve above and the cylindrical hole of the clamping sleeve below.

7. The electrical connector socket with small or zero insertion force according to claim 1, 2 or 3, characterized in that: On the outer wall of the lower end of the socket piece, there is a tapered surface that matches the hole wall of the tapered hole of the clamping sleeve.

8. The electrical connector socket with small or zero insertion force according to claim 1, 2 or 3, characterized in that: The socket body includes a first socket plate, a second socket plate, a third socket plate, and a fourth socket plate that are arranged horizontally and sequentially from top to bottom and are connected to each other. The third socket plate is provided with a vertical central through hole to form the inner cavity of the pressing plate. The first socket plate is provided with a plurality of corresponding vertical screw holes, and the second socket plate is provided with a plurality of corresponding vertical through holes to form a plurality of socket screw holes. The first socket plate and the second socket plate are respectively provided with a plurality of corresponding vertical through holes to form the upper segments of a plurality of socket through holes. The lower segment of the vertical through hole of the first socket plate has an increased aperture to form the convex ring groove. The fourth socket plate is provided with a plurality of corresponding vertical through holes to form a plurality of socket large-diameter holes and a plurality of socket small-diameter holes.

9. The electrical connector socket with small or zero insertion force according to claim 8, characterized in that: The first socket plate, the second socket plate, the third socket plate, and the fourth socket plate are connected by a plurality of vertical rivets located near the edge positions.

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