Ejector pin and connector module

Abstract

The embodiment of the utility model provides an ejector pin and a connector module. The thimble comprises a needle tube, a needle head, an accessory and an elastic piece. A containing cavity is formed in the needle tube and provided with a first opening. The needle head is arranged in the containing cavity in a sliding mode in the axial direction of the needle tube, and the needle head partially protrudes out of the first opening. The accessory is connected with the needle head and located in the containing cavity, a cavity is formed in the accessory, and the cavity is communicated with the containing cavity. The elastic piece is contained in the containing cavity, one end of the elastic piece abuts against the bottom of the containing cavity, and the other end of the elastic piece stretches into the cavity and abuts against the accessory. In addition to conduction between the needle head and the needle tube, current can also be conducted between the needle tube, the needle head and the accessory, so that the ejector pin has two current conduction paths, the situation that the elastic piece is burnt out when the needle head and the needle tube are instantaneously broken can be avoided, and the ejector pin is resistant to large current.

Description

Technical Field

[0001] The present application relates to the field of connectors, and in particular to a ejector pin and a connector module. Background Art

[0002] Pogo pin is a spring-type probe precision connector made of three basic components: a needle, a spring, and a needle tube. It can be used in some small and delicate electronic products such as mobile phones. It is widely used in semiconductor equipment to play a connecting role.

[0003] In the related art, since the spring is mostly made of metal, when the needle and the needle tube are disconnected, excessive current flows through the spring, causing the spring to burn out and fail. In the prior art, a steel ball is placed in the needle tube to prevent the spring from burning out and failing. However, the space inside some needle tubes is small and is not enough to add a steel ball structure. Utility Model Content

[0004] The embodiment of the present application provides a ejector pin and a connector module, which can meet the requirement of withstanding large currents when the space inside the tube is small.

[0005] The ejector provided in the embodiment of the present application includes a needle tube, a needle, an accessory and an elastic member. A receiving cavity is formed inside the needle tube, and the receiving cavity has a first opening; the needle is slidably mounted in the receiving cavity along the axial direction of the needle tube, and the needle part protrudes from the first opening. The accessory is connected to the needle and is located in the receiving cavity, and a cavity is formed inside the accessory, and the cavity is connected to the receiving cavity. The elastic member is accommodated in the receiving cavity, one end of the elastic member abuts the bottom of the receiving cavity, and the other end extends into the cavity and abuts against the accessory.

[0006] In certain embodiments, a gap between an outer wall of the accessory and an inner wall of the needle tube is 0.05 mm to 0.09 mm.

[0007] In some embodiments, the needle includes a first section and a second section connected to the first section, a portion of the first section protrudes out of the first opening, the second section abuts against the accessory, and an end surface of the second section abutting against the accessory is an inclined surface.

[0008] In certain embodiments, the angle between the inclined surface and the inner wall of the needle tube is 72° to 78°.

[0009] In some embodiments, the outer diameter of the first section is smaller than the outer diameter of the second section, a flange is provided at one end of the needle tube close to the first section, the flange surrounds the first opening, and under the elastic force of the elastic member, the bottom end of the flange abuts against the top end of the second section.

[0010] In certain embodiments, the gap between the inner wall of the needle tube and the side wall of the first section is 0.1 mm to 0.15 mm.

[0011] In certain embodiments, a first positioning groove is formed in the needle tube on a side away from the first opening, one end of the elastic member is accommodated in the first positioning groove, and the other end extends into the cavity to abut against the accessory.

[0012] In certain embodiments, a gap between the bottom wall of the first positioning groove and the bottom surface of the needle tube is greater than or equal to 0.03 mm.

[0013] In certain embodiments, the ejector pin further comprises a pin, and the pin is disposed on a side of the needle tube away from the needle head.

[0014] The connector module provided in the embodiment of the present application comprises a connecting piece and any one of the ejector pins described above, wherein the connecting piece is provided with a plurality of installation holes arranged at intervals, the ejector pins correspond to the installation holes one by one, and a plurality of the ejector pins are installed in the installation holes.

[0015] In the ejector pin and connector module of the embodiment of the present application, in addition to the conduction between the needle and the needle tube, the current can also be conducted between the needle tube, the needle and the accessories, so that the ejector pin has two current conduction paths, which can avoid the elastic part from burning out when the needle and the needle tube are momentarily disconnected, and make the ejector pin resistant to large currents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0017] Figure 1 Schematic diagram of the structure of the ejector pin according to an embodiment of the present application.

[0018] Figure 2 This is a schematic diagram of an exploded view of the ejector pin according to an embodiment of the present application.

[0019] Figure 3 Schematic diagram of a cross-section of an ejector pin according to an embodiment of the present application.

[0020] Figure 4 This is a schematic diagram of the structure of the connector module according to an embodiment of the present application.

[0021] Description of main component symbols:

[0022] Ejector pin 100, needle tube 10, accommodating cavity 11, first opening 12, inner wall 13, needle head 20, first section 21, side wall 211 of first section 21, second section 22, inclined surface 23, accessory 30, cavity 31, head end 32, tail end 33, second positioning groove 34, outer wall 35 of accessory 30, elastic member 40, pin 50, connector module 1000, connecting member 200, mounting hole 201. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0024] In the description of the present application, it should be understood that the terms, "length", "width", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In the description of this application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0028] See also Figure 1-Figure 3The ejector pin 100 provided in the embodiment of the present application includes a needle tube 10, a needle 20, an accessory 30 and an elastic member 40. A receiving cavity 11 is formed inside the needle tube 10, and the receiving cavity 11 has a first opening 12. The needle 20 is slidably mounted in the receiving cavity 11 along the axial direction of the needle tube 10, and a portion of the needle 20 protrudes from the first opening 12. The accessory 30 is connected to the needle 20 and is located in the receiving cavity 11, and a cavity 31 is formed inside the accessory 30, and the cavity 31 is connected to the receiving cavity 11. The elastic member 40 is accommodated in the receiving cavity 11, one end of the elastic member 40 abuts against the bottom of the receiving cavity 11, and the other end extends into the cavity 31 and abuts against the accessory 30.

[0029] In the ejector pin 100 and the connector module 1000 of the embodiment of the present application, in addition to the conduction between the needle 20 and the needle tube 10, the current can also be conducted between the needle tube 10, the needle 20 and the accessory 30, so that the ejector pin 100 has two current conduction paths, which can avoid the elastic member 40 from burning out when the needle 20 and the needle tube 10 are momentarily disconnected, so that the ejector pin 100 can withstand large currents.

[0030] The needle 20, the accessory 30 and the needle tube 10 can be made of copper materials, such as brass, beryllium copper or phosphor bronze, etc., without limitation. In addition, the surfaces of the needle 20, the accessory 30 and the needle tube 10 can be gold-plated, which can reduce the impedance of the ejector pin 100 and improve the conductive performance.

[0031] Specifically, under the elastic force of the elastic member 40, the accessory 30 has a tendency to make the needle 20 slide toward the first opening 12, and the first opening 12 is used to expose the needle 20 so that the needle 20 can be electrically connected to the external electronic components. Due to the limited size of the needle tube 10, the accessory 30 is arranged at the lower end of the needle 20, and the accessory 30 is formed with a cavity 31 for accommodating part of the elastic member 40, so as to avoid burning the elastic member 40 when the needle 20 and the needle tube 10 are disconnected, so that the ejector pin 100 can withstand large currents, and the elastic force, size and downward pressing stroke of the original elastic member 40 can be not affected. The elastic member 40 extends into the cavity 31 formed by the accessory 30, which can avoid the problem of the elastic member 40 swinging and causing the jamming during the elastic expansion and contraction process, so that the elastic member 40 is more stable and works more reliably during the elastic expansion and contraction process.

[0032] The accessory 30 may include a head end 32 and a tail end 33 connected to the head end 32, the head end 32 abuts against the needle 20, and the interior of the tail end 33 is used to accommodate the elastic member 40, wherein the head end 32 may be hemispherical, and the tail end 33 may be cylindrical, and the head end 32 and the tail end 33 together enclose a cavity 31. It should be noted that when the needle 20 is abutted and slid to drive the accessory 30 to slide along the axial direction of the needle tube 10, the side surface of the tail end 33 is a continuous cylindrical surface and can make the needle 20 and the accessory 30 slide more smoothly in the receiving cavity 11.

[0033] When the needle 20 and the external electronic component are in contact with each other and pressed, the external electronic component presses the needle 20 so that the needle 20 slides and retracts into the receiving chamber 11 in the needle tube 10. In the process of the needle 20 moving into the receiving chamber 11, the needle 20 drives the accessory 30 to slide in the receiving chamber 11. In addition to the conduction path between the needle 20 and the needle tube 10, an additional conduction path between the needle tube 10, the needle 20 and the accessory 30 is provided by the connection between the accessory 30 and the needle 20. This can prevent the current from directly passing through the elastic member 40 and causing damage to the elastic member 40 when the needle 20 and the needle tube 10 are disconnected. Therefore, the ejector pin 100 of the embodiment of the present application can withstand large currents and prevent the elastic member 40 from being damaged by the current directly flowing through the elastic member 40.

[0034] In the ejector pin 100 implemented in the present application, the elastic member 40 may be a spring. Of course, in other embodiments, the elastic member 40 may also be an elastic column or a spring sheet, etc., and is not limited thereto.

[0035] See also Figure 3 In some embodiments, the gap between the outer wall 35 of the accessory 30 and the inner wall 13 of the needle tube 10 is 0.05 mm to 0.09 mm. Thus, by setting the gap between the outer wall 35 of the accessory 30 and the inner wall 13 of the needle tube 10 within the above range, the accessory 30 can be prevented from being stuck in the needle tube 10 and thus affecting the movement of the needle 20.

[0036] Specifically, the gap between the outer wall 35 of the accessory 30 and the inner wall 13 of the needle tube 10 can be 0.05mm, 0.06mm, 0.07mm, 0.08mm, etc., or the gap between the outer wall 35 of the accessory 30 and the inner wall 13 of the needle tube 10 can be any value within the numerical range defined by any two of the above values.

[0037] When the gap between the outer wall 35 of the accessory 30 and the inner wall 13 of the needle tube 10 is less than 0.05 mm, the accessory 30 is easily stuck in the needle tube 10, making it difficult or even impossible for the needle 20 to slide when the needle 20 is pressed. However, when the gap between the outer wall 35 of the accessory 30 and the inner wall 13 of the needle tube 10 is greater than 0.09 mm, the accessory 30 is easily deflected relative to the axial direction of the needle tube 10 under the action of external force, and the continuous application of external force may cause the accessory 30 to get stuck in the needle tube 10, thereby affecting the movement of the needle 20.

[0038] See also Figure 2 and Figure 3In some embodiments, the needle 20 includes a first section 21 and a second section 22 connected to the first section 21, a portion of the first section 21 protrudes from the first opening 12, the second section 22 abuts against the accessory 30, and the end surface of the second section 22 abutting against the accessory 30 is an inclined surface 23. In this way, the inclined surface 23 can enable the accessory 30 to have a lateral force to drive the needle 20 to contact the needle tube 10 under the action of elastic force, so that the needle 20 and the needle tube 10 remain connected to avoid instantaneous disconnection.

[0039] Among them, the first section 21 and the second section 22 are both columnar structures, and the second section 22 is loosely matched with the inner wall 13 of the needle tube 10. The second section 22 is tilted under the action of the lateral force to contact the inner wall 13 of the needle tube 10. Specifically, when the external electronic component abuts against the first section 21 to make the needle 20 slide downward, under the action of the elastic force and the cooperation between the accessory 30 and the inclined surface 23, the accessory 30 can decompose the force of the elastic member 40 into a vertical force and a lateral force. The lateral force can make the needle 20 contact the inner wall 13 of the needle tube 10, thereby maintaining the conduction between the needle 20 and the needle tube 10 during the sliding process, and preventing the needle tube 10 and the needle 20 from being disconnected momentarily.

[0040] See also Figure 2 In some embodiments, the end surface of the first section 21 of the needle 20 is a hemispherical arc surface. In this way, the end surface of the first section 21 is a hemispherical arc surface, which can improve the contact smoothness between the first section 21 and the external electronic components and avoid scratching other external electronic components.

[0041] In some embodiments, the end surface of the first section 21 of the needle 20 is a plane. In this way, the end surface of the first section 21 is set to be a plane, so that the needle 20 has a larger conductive area, and when used as a connection electrode, it can effectively contact the conductive end surface to maintain the crimping stability and conductivity of the needle 20. Among them, the end surface of the first section 21 of the needle 20 is a plane, and the circumferential connection between the end surface of the first section 21 and the side wall of the first section 21 is a rounded corner.

[0042] In some embodiments, the head end 32 of the accessory 30 is a spherical structure. Under the elastic force of the elastic member 40, the head end 32 of the accessory 30 abuts against the second section 22 of the needle 20, and the tail end 33 of the accessory 30 and the head end 32 together form a cavity 31. The accessory 30 with a spherical structure can reduce the wear of the second section 22 and the head end 32 under the abutment with the inclined surface 23, thereby extending the service life of the ejector 100. The spherical structure can be a hemisphere, a 1 / 3 sphere, a 2 / 3 sphere, etc., which is not limited here.

[0043] See also Figure 3In some embodiments, the angle between the inclined surface 23 and the inner wall 13 of the needle tube 10 is 72° to 78°. In this way, while ensuring the lateral force, it is also possible to avoid excessive friction between the needle 20 and the inner wall 13 of the needle tube 10, which makes it difficult or even impossible for the needle 20 to slide.

[0044] Specifically, the angle between the inclined surface 23 and the inner wall 13 of the needle tube 10 can be 72°, 73°, 74°, 74°, 75°, 76°, 77° or 78°, etc., or the angle between the inclined surface 23 and the inner wall 13 of the needle tube 10 can be any value within the numerical range defined by any two of the above numerical values.

[0045] When the angle between the inclined surface 23 and the inner wall 13 of the needle tube 10 is less than 72°, the lateral force generated is too small, which may result in poor contact between the needle 20 and the needle tube 10. When the angle between the inclined surface 23 and the inner wall 13 of the needle tube 10 is greater than 78°, the tip of the second section 22 is prone to be sharpened during the processing of the inclined surface 23, resulting in greater friction with the inner wall 13 of the needle tube 10, which makes it difficult or even impossible for the needle 20 to slide in the needle tube 10.

[0046] See also Figure 2 and Figure 3 In some embodiments, the outer diameter of the first section 21 is smaller than the outer diameter of the second section 22, and a flange 14 is provided at one end of the needle tube 10 close to the first section 21, and the flange 14 surrounds the first opening 12. Under the elastic force of the elastic member 40, the bottom end of the flange 14 abuts against the top end of the second section 22. In this way, the flange 14 can abut against the second section 22 to prevent the needle 20 from sliding out of the receiving cavity 11 from the first opening 12 due to the excessive reaction of the elastic member 40. Among them, the outer diameter of the first section 21 is smaller than the outer diameter of the second section 22 so that a step structure is formed at the junction of the first section 21 and the second section 22, and the step structure can abut on the bottom of the flange 14.

[0047] See also Figure 2 and Figure 3 In some embodiments, the gap between the inner wall 13 of the needle tube 10 and the side wall 211 of the first section 21 is 0.1 mm to 0.15 mm. In this way, the gap between the inner wall 13 of the needle tube 10 and the side wall 211 of the first section 21 is controlled within the range of 0.1 mm to 0.15 mm, which ensures that the needle 20 can move normally in the needle tube 10 and prevents the needle 20 from shaking.

[0048] Specifically, the gap between the inner wall 13 of the needle tube 10 and the side wall 211 of the first section 21 can be 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm or 0.15mm, etc., or the gap between the inner wall 13 of the needle tube 10 and the side wall 211 of the first section 21 can be any value within the numerical range defined by any two of the above numerical values.

[0049] When the gap between the inner wall 13 of the needle tube 10 and the side wall 211 of the first section 21 is less than 0.1 mm, the second section 22 may get stuck on the inner wall 13 of the needle tube 10 because the outer diameter of the second section 22 is larger than the outer diameter of the first section 21, so that the needle 20 cannot be pressed to slide. However, when the gap between the inner wall 13 of the needle tube 10 and the side wall 211 of the first section 21 is greater than 0.15 mm, the needle 20 may shake relative to the axial direction of the needle tube 10 when the needle 20 is pressed.

[0050] See also Figure 3 In some embodiments, a first positioning groove 15 is formed on the side of the needle tube 10 away from the first opening 12, one end of the elastic member 40 is accommodated in the first positioning groove 15, and the other end extends into the cavity 31 to abut against the accessory 30. In this way, the first positioning groove 15 can limit the position of the elastic member 40 to prevent the elastic member 40 from swinging relative to the axial direction of the needle tube 10. This ensures that the elastic member 40 is more stable and works more reliably during the elastic expansion and contraction process.

[0051] The shape of the first positioning groove 15 can be conical, cylindrical or arc-shaped, etc., which is not limited here. Preferably, the first positioning groove 15 is a conical groove, which is not only easy to process, but also can directly form the first positioning groove 15 in a conical shape while punching the needle tube 10 to form the receiving cavity 11. In addition, the elastic member 40 can abut against the inclined surface of the conical first positioning groove 15, thereby increasing the friction between the elastic member 40 and the first positioning groove 15 and thus better avoiding the displacement of the elastic member 40.

[0052] See also Figure 3 In some embodiments, a second positioning groove 34 is formed inside the accessory 30, one end of the elastic member 40 is placed in the second positioning groove 34, and the other end of the elastic member 40 abuts against the bottom of the needle tube 10. In this way, the second positioning groove 34 can limit the position of the elastic member 40, and prevent the elastic member 40 from swinging relative to the axial direction of the needle tube 10. This ensures that the elastic member 40 is more stable and works more reliably during the elastic expansion and contraction process.

[0053] The shape of the second positioning groove 34 can be conical, cylindrical or arc-shaped, etc., which is not limited here. Preferably, the second positioning groove 34 is a conical groove, which is not only easy to process, but also can directly form the conical second positioning groove 34 when the accessory 30 is punched to form the cavity 31. In addition, the elastic member 40 can abut against the inclined surface of the conical second positioning groove 34, thereby increasing the friction between the elastic member 40 and the second positioning groove 34 and thus better preventing the elastic member 40 from deflecting.

[0054] See also Figure 3 In some embodiments, a first positioning groove 15 is formed on the side of the needle tube 10 away from the first opening 12, a second positioning groove 34 is formed inside the accessory 30, one end of the elastic member 40 is accommodated in the first positioning groove 15, and the other end of the elastic member 40 is placed in the second positioning groove 34. In this way, the first positioning groove 15 and the second positioning groove 34 can simultaneously define the position of the elastic member 40, thereby better preventing the elastic member 40 from being offset relative to the axial direction of the needle tube 10. The first positioning groove 15 and the second positioning groove 34 are aligned along the axial direction of the needle tube 10 to prevent the elastic member 40 from being placed tilted.

[0055] In some embodiments, the gap between the bottom wall of the first positioning groove 15 and the bottom surface of the needle tube 10 is greater than or equal to 0.03 mm. In this way, the bottom of the needle tube 10 will not be damaged due to the bottom of the needle tube 10 being too thin, and the solder can be prevented from entering the inside of the needle tube 10 when the bottom surface of the ejector pin 100 is welded to the PCB board to weld the elastic member 40 so that it cannot be deformed.

[0056] It should be pointed out that since the shape of the first positioning groove 15 can be conical, cylindrical or arc-shaped, etc., when the first positioning groove 15 is conical or arc-shaped so that the bottom wall of the first positioning groove 15 is not flat, the gap between the lowest point of the bottom wall of the first positioning groove 15 and the bottom surface of the needle tube 10 is greater than or equal to 0.03mm, which can also prevent the solder from entering the inside of the needle tube 10 to weld the elastic part 40 when the bottom surface of the ejector pin 100 is welded to the PCB board.

[0057] See also Figure 2 and Figure 3 In some embodiments, the ejector pin 100 may further include a pin 50, which is disposed on the side of the needle tube 10 away from the needle head 20. In this way, the ejector pin 100 can be connected to the PCB board through the pin 50, thereby realizing the power supply function of the ejector pin 100, and the pin 50 can also ensure that the ejector pin 100 does not fall during the welding process between the ejector pin 100 and the PCB board.

[0058] The pin 50 can be made of copper material, such as brass, beryllium copper or phosphor bronze, etc., which is not limited here. In addition, the surface of the pin 50 is gold-plated, which can reduce the impedance of the ejector pin 100 and improve the conductive performance.

[0059] See also Figure 4 The connector module 1000 provided in the embodiment of the present application includes a connector 200 and any of the ejector pins 100 described above, and the connector 200 is provided with a plurality of installation holes 201 arranged at intervals. The ejector pins 100 correspond to the installation holes 201 one by one, and a plurality of ejector pins 100 are installed in the installation holes 201. Since the connector module 1000 adopts the ejector pins 100 of the embodiment of the present application, it has at least all the beneficial effects brought by the technical solutions of the above embodiments.

[0060] Among them, the connector module 1000 can form a modular structure, and the connector module 1000 can be directly installed on the external device as a conductive connection interface. By making the connector module 1000 modular, it can be easily assembled and the assembly efficiency can be improved. In addition, the connector module 1000 can be standardized so that it can be applied to a variety of devices to improve versatility.

[0061] Specifically, the needle tube 20 of the ejector pin 100 can extend into the mounting hole 201. The plurality of ejector pins 100 described in any of the above items can be two, three, four, etc., which is not limited here, and the number of ejector pins 100 can be selected according to actual needs. It should be noted that in addition to the ejector pin 100 provided in the embodiment of the present application, other types of ejector pins 100 can also be installed on the connector 200 at the same time.

[0062] The ejector pin and connector module provided in the embodiment of the present application are introduced in detail above. Specific examples are used herein to illustrate the principle and implementation method of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A ejector pin, characterized in that: include: A needle tube, wherein a receiving cavity is formed inside the needle tube, and the receiving cavity has a first opening; A needle, the needle is slidably mounted in the receiving cavity along the axial direction of the needle tube, and the needle portion protrudes from the first opening; an accessory, the accessory being connected to the needle and being located in the receiving cavity, the interior of the accessory forming a cavity, the cavity being in communication with the receiving cavity; and An elastic member is accommodated in the receiving cavity, one end of the elastic member abuts against the bottom of the receiving cavity, and the other end extends into the cavity and abuts against the accessory.

2. The ejector pin according to claim 1, characterized in that: The gap between the outer wall of the accessory and the inner wall of the needle tube is 0.05 mm to 0.09 mm.

3. The ejector pin according to claim 1, characterized in that: The needle head includes a first section and a second section connected to the first section, a portion of the first section protrudes out of the first opening, the second section abuts against the accessory, and an end surface of the second section abutting against the accessory is an inclined surface.

4. The ejector pin according to claim 3, characterized in that: The included angle between the inclined surface and the inner wall of the needle tube is 72° to 78°.

5. The ejector pin according to claim 3, characterized in that: The outer diameter of the first section is smaller than that of the second section. A flange is provided at one end of the needle tube close to the first section. The flange surrounds the first opening. Under the elastic force of the elastic member, the bottom end of the flange abuts against the top end of the second section.

6. The ejector pin according to claim 5, characterized in that: The gap between the inner wall of the needle tube and the side wall of the first section is 0.1 mm to 0.15 mm.

7. The ejector pin according to claim 1, characterized in that: A first positioning groove is formed on one side of the needle tube away from the first opening. One end of the elastic member is accommodated in the first positioning groove, and the other end extends into the cavity to abut against the accessory.

8. The ejector pin according to claim 7, characterized in that: The gap between the bottom wall of the first positioning groove and the bottom surface of the needle tube is greater than or equal to 0.03 mm.

9. The ejector pin according to claim 1, characterized in that: The ejector pin further comprises a pin, and the pin is arranged on a side of the needle tube away from the needle head.

10. A connector module, characterized in that: include: A connecting piece, wherein the connecting piece is provided with a plurality of installation holes arranged at intervals; and A plurality of ejector pins according to any one of claims 1 to 9, wherein the ejector pins correspond to the mounting holes one by one, and a plurality of the ejector pins are installed in the mounting holes.

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