Ejector pin and electronic equipment

Abstract

The utility model provides an ejector pin and electronic equipment, and the ejector pin comprises a needle tube which is provided with a containing cavity and a first opening which are communicated with each other; the elastic piece is arranged in the accommodating cavity; at least part of the needle shaft assembly is arranged in the containing cavity, the needle shaft assembly can move in the axial direction of the needle tube, one end of the needle shaft assembly abuts against the elastic piece, and the other end of the needle shaft assembly can stretch out of the first opening; wherein the needle tube comprises a first section, a second section and a third section which are sequentially connected, the first section is provided with a first opening, the diameter of the first section is larger than that of the second section, the diameter of the second section is larger than that of the third section, and a first limiting part is convexly arranged on the outer wall, deviating from the containing cavity, of the second section. According to the thimble, the mounting stability of the thimble can be improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a ejector pin and an electronic device. Background Art

[0002] Ejector pins are components used to achieve electrical connections. They are often used in electronic devices, especially in situations where frequent plugging and unplugging is required or where connection stability is maintained in a dynamic environment. Stably installed ejector pins can ensure the reliability of electrical connections and reduce electronic device failures caused by poor contact or loose connections. However, in the related art, the installation stability of ejector pins is insufficient. Utility Model Content

[0003] The embodiments of the present application provide a ejector pin and an electronic device, which can improve the stability of ejector pin installation.

[0004] In a first aspect, an embodiment of the present application provides a ejector pin, comprising:

[0005] A needle tube, provided with a receiving cavity and a first opening which are communicated with each other;

[0006] An elastic member, disposed in the accommodating cavity;

[0007] a needle shaft assembly, at least partially disposed in the accommodating cavity, the needle shaft assembly being capable of moving along the axial direction of the needle tube, one end of the needle shaft assembly being in contact with the elastic member, and the other end of the needle shaft assembly being capable of extending from the first opening;

[0008] Wherein, the needle tube includes a first section, a second section and a third section connected in sequence, the first section is provided with the first opening, the diameter of the first section is larger than the diameter of the second section, the diameter of the second section is larger than the diameter of the third section, and the second section is provided with a first limiting portion protruding from the outer wall of the accommodating cavity.

[0009] In one embodiment, the first limiting portion is arranged around the second section.

[0010] In one embodiment, the first limiting portion includes a top edge facing the first section, a bottom edge facing the third section, and an intermediate edge connected between the top edge and the bottom edge, the bottom edge is inclined relative to the outer wall of the second section, and the top edge is perpendicular to the outer wall of the second section.

[0011] In one embodiment, the third section includes a connecting portion connected to the second section, and a diameter of the connecting portion gradually decreases in a direction away from the first section.

[0012] In one embodiment, the third section includes a tail end portion away from the second section, and a diameter of the tail end portion gradually decreases in a direction away from the first section.

[0013] In one embodiment, the first section, the second section and the third section are flush with the inner wall of the accommodating cavity.

[0014] In one embodiment, the needle shaft assembly includes a needle shaft and a ball, the ball is disposed in the accommodating cavity and abuts against the elastic member, the needle shaft abuts against a side of the ball away from the elastic member and passes through the first opening.

[0015] In one embodiment, the first section includes a first inner wall and a second limiting portion surrounding the needle shaft, and the first inner wall is provided with the second limiting portion protruding toward the needle shaft; the needle shaft includes a built-in section and a movable section, the diameter of the built-in section is larger than the diameter of the movable section, the built-in section is arranged in the accommodating cavity, and the movable section is passed through the first opening; when the needle shaft extends out of the needle tube, the built-in section abuts against the second limiting portion to limit the built-in section to the accommodating cavity.

[0016] In a second aspect, an embodiment of the present application further provides an electronic device, including:

[0017] A receiving member having a receiving groove;

[0018] An ejector pin, such as the ejector pin described in any of the above embodiments, wherein the ejector pin is disposed in the receiving groove, and the ejector pin is interference-fitted with the receiving groove through the first limiting portion.

[0019] In one embodiment, the accommodating member includes a groove side wall and a groove bottom wall forming the accommodating groove, the groove side wall includes a first surface away from the groove bottom wall; the first section includes a second surface away from the third section, and the second surface is flush with the first surface.

[0020] The needle tube of the ejector pin of the embodiment of the present application has a receiving cavity for placing an elastic member and a needle shaft assembly. The elastic member is placed in the receiving cavity to provide the necessary elastic force for the needle shaft assembly so that the needle shaft assembly can move along the axial direction of the needle tube. The needle tube includes three sections connected in sequence, each section having a different diameter. The third section has the smallest diameter and can play a guiding role during the installation process. When the needle tube is inserted into the receiving groove of the conductive component, the third section can easily enter the receiving groove, thereby improving the alignment accuracy and simplifying the installation process of the ejector pin. The diameter of the second section is smaller than the first section but larger than the third section. The second section is convexly provided with a limiting portion on the outer wall away from the receiving cavity. This first limiting portion can, for example, form an interference fit with the receiving groove, thereby ensuring that the needle tube will not be over-inserted when inserted into the receiving groove, and at the same time provide a fixing effect to prevent the needle tube from shifting or falling off when subjected to external force, thereby improving the stability of the ejector pin installation. Moreover, the first section has a larger diameter and is provided with a first opening to allow one end of the needle shaft assembly to extend. When the needle tube is fully inserted into the receiving groove, the first section with a larger diameter can abut against the inner wall of the receiving groove, thereby helping to stabilize the position of the ejector pin. Therefore, the needle tube of the ejector pin in the embodiment of the present application cleverly adopts a design of three sections with different diameters, thereby achieving convenience and stability in installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the structure of the ejector pin provided in an embodiment of the present application.

[0023] Figure 2 for Figure 1 The cross-sectional view of the ejector pin along the AA direction is shown.

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the needle tube of the ejector pin shown.

[0025] Figure 4 for Figure 2 A partial enlarged view of part B of the ejector pin is shown.

[0026] Figure 5 for Figure 2 A partial enlarged view of part C of the ejector pin is shown.

[0027] Figure 6 for Figure 2 A partial enlarged view of part D of the ejector pin is shown.

[0028] Figure 7It is a structural schematic diagram of an ejector pin in the related art. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0030] The present application embodiment provides a ejector pin, which is described below in conjunction with the accompanying drawings. Figure 1 , Figure 2 and Figure 3 . Figure 1 A schematic diagram of the structure of the ejector pin provided in the embodiment of the present application, Figure 2 for Figure 1 The cross-sectional view of the ejector pin along the AA direction is shown. Figure 3 for Figure 1 Schematic diagram of the needle tube structure of the ejector pin shown.

[0031] The ejector pin 10 provided in the embodiment of the present application includes a needle tube 100, an elastic member 200 and a needle shaft assembly 300. The needle tube 100 includes a accommodating cavity 110 and a first opening 120 which are interconnected. The elastic member 200 is disposed in the accommodating cavity 110. The needle shaft assembly 300 is at least partially disposed in the accommodating cavity 110. The needle shaft assembly 300 can move along the axial direction of the needle tube 100. One end of the needle shaft assembly 300 abuts against the elastic member 200, and the other end of the needle shaft assembly 300 can extend from the first opening 120.

[0032] The needle tube 100 has a receiving cavity 110 for placing the elastic member 200 and the needle shaft assembly 300. The elastic member 200 is placed in the receiving cavity 110 to provide the necessary elastic force for the needle shaft assembly 300. The needle shaft assembly 300 can move along the axial direction (i.e., the length direction) of the needle tube 100. One end of the needle shaft assembly 300 abuts against the elastic member 200, and the other end can extend from the first opening 120 of the needle tube 100 to establish an electrical connection with the conductive component. The elastic member 200 can be, for example, a spring. In addition to the spring, it can also be other types of elastic members, such as elastic polymers, rubber washers, etc., which are not limited in this embodiment.

[0033] The needle tube 100 includes three sections connected in sequence, each section having a different diameter. It is understandable that when the ejector pin 10 is used, the ejector pin 10 needs to be inserted into the receiving groove of the conductive component. The third section 170 has the smallest diameter, and the diameter of the third section 170 can be set to be smaller than the receiving groove of the conductive component. Due to the small diameter, it can play a guiding role during the installation process. The third section 170 can be easily inserted into the receiving groove, which improves the alignment accuracy and simplifies the installation process of the ejector pin 10.

[0034] The diameter of the second section 150 is smaller than that of the first section 130 but larger than that of the third section 170, and a first limiting portion 151 is protruded from the outer wall of the second section 150 away from the accommodating cavity 110. The diameter of this protruding first limiting portion 151 is larger than that of the second section 150, and can form an interference fit with the accommodating groove, thereby ensuring that the needle tube 100 is not over-inserted into the accommodating groove, and at the same time providing a fixing effect to prevent the needle tube 100 from shifting or falling off when subjected to external force, thereby improving the stability of the installation of the ejector pin 10.

[0035] The first section 130 has a larger diameter and is provided with a first opening 120, allowing one end of the needle shaft assembly 300 to extend out. When the needle tube 100 is fully inserted into the receiving groove, the first section 130 abuts against the inner wall of the receiving groove, which not only provides an additional limiting effect, but also helps to stabilize the position of the needle tube 100 and ensure the stability and reliability of the electrical connection. Therefore, the needle tube 100 of the ejector 10 of the embodiment of the present application achieves convenience and stability in installation by cleverly adopting a design of three sections with different diameters.

[0036] In some embodiments, the first limiting portion 151 is arranged around the second section 150. The first limiting portion 151 is an annular structure surrounding the periphery of the second section 150, and can provide a more uniform supporting force. The close fit between the annular first limiting portion 151 and the receiving groove helps to improve the stability of the ejector pin and reduce looseness caused by vibration or external force.

[0037] In some embodiments, please combine Figure 4 , Figure 4 for Figure 2 The first limiting portion 151 includes a top edge 152 facing the first section 130, a bottom edge 153 facing the third section 170, and a middle edge 154 connected between the top edge 152 and the bottom edge 153, the bottom edge 153 is inclined relative to the outer wall of the second section 150, and the top edge 152 is perpendicular to the outer wall of the second section 150.

[0038] The bottom edge 153 is inclined toward the third section 170 and relative to the outer wall of the second section 150. The inclined design of the bottom edge 153 helps to guide the first limiting portion 151 to enter the receiving groove smoothly during the insertion of the needle tube 100 into the receiving groove, which can reduce the force required for the insertion of the needle tube 100. In addition, the inclined setting of the bottom edge 153 makes the outer diameter of the first limiting portion 151 gradually increase from the bottom edge 153 to the top edge 152. The progressive diameter change helps to provide a smooth transition during the insertion of the first limiting portion 151, and at the same time ensures that the first limiting portion 151 can be tightly matched with the receiving groove after being inserted into place, thereby increasing the stability of the installation. The middle edge 154 connects the top edge 152 and the bottom edge 153. For example, the middle edge 154 can be parallel to the axial direction of the needle tube 100, increase the contact area with the inner wall of the receiving groove, and improve the stability of the connection. Of course, the middle edge 154 can also have a certain curvature, which is not limited in this embodiment.

[0039] In some embodiments, please combine Figure 5 , Figure 5 for Figure 2 The third section 170 includes a connecting portion 171 connected to the second section 150, and the diameter of the connecting portion 171 gradually decreases in the direction away from the first section 130. The third section 170 has a smaller diameter and can serve as a guide portion to enter the receiving groove before the second section 150 to ensure that the needle tube 100 can be smoothly aligned with the receiving groove, and the diameter of the connecting portion 171 gradually decreases in the direction away from the second section 150, so that in the process of inserting the needle tube 100 into the receiving groove, a smooth transition can be achieved between the third section 170 and the second section 150.

[0040] In some embodiments, please combine Figure 6 , Figure 6 for Figure 2 The third section 170 includes a tail end 173 away from the second section 150, and the diameter of the tail end 173 gradually decreases in the direction away from the first section 130. As the diameter of the tail end 173 gradually decreases, the tail end 173 will be easier to insert into the receiving groove, improving the insertion accuracy, thereby helping the needle tube 100 to enter the receiving groove more smoothly.

[0041] In some embodiments, the third section 170 includes a plug-in portion 175 connected between the connecting portion 171 and the tail end 173, and the diameter of the plug-in portion 175 is larger than the diameter of the tail end 173, and smaller than the diameter of the connecting portion 171. The third section 170 includes the connecting portion 171, the plug-in portion 175 and the tail end 173, each of which has a specific diameter size, and the diameter of the plug-in portion 175 is between the connecting portion 171 and the tail end 173, which helps to provide structural stability and ensure that the needle tube 100 remains stable during insertion and removal.

[0042] In some embodiments, the first section 130, the second section 150, and the third section 170 are flush with the inner wall 140 of the accommodating cavity 110. The flush design of the three sections of the inner wall of the needle tube 100 provides a smooth transition from the first section 130 to the third section 170, which can optimize the space utilization inside the needle tube 100, ensure that the elastic member 200 and the needle shaft assembly 300 have enough space to move, and can also reduce the resistance of the elastic member 200 and the needle shaft assembly 300 during movement, and also help reduce the complexity of the manufacturing process.

[0043] In some embodiments, the difference between the diameter of the first section 130 and the diameter of the second section 150 is greater than a preset threshold value, which can be set as needed, such as a preset threshold value of 0.25 mm, 0.3 mm, etc., so that the diameter change between the first section 130 and the second section 150 is more obvious, which helps to improve the accuracy and controllability of the processing process, and because the diameter difference is large, a specific jig plate can be used to fix and guide the needle tube 100 to ensure the correct direction of the needle tube 100 during the assembly process and reduce assembly errors. The larger diameter of the first section 130 allows the first section 130 to provide a larger surface area to withstand external forces, making the entire needle tube 100 less likely to deform when subjected to external forces, which helps to maintain the long-term performance and reliability of the ejector pin.

[0044] In some embodiments, the needle shaft assembly 300 includes a needle shaft 310 and a ball 330. The ball 330 is disposed in the accommodating cavity 110 and abuts against the elastic member 200. The needle shaft 310 abuts against the side of the ball 330 away from the elastic member 200 and is passed through the first opening 120. The ball 330 is disposed between the elastic member 200 and the needle shaft 310. As a rolling element, the ball 330 can significantly reduce the friction force of the needle shaft 310 when it moves under the action of the elastic member 200, reduce the wear and jamming caused by friction, and ensure the smooth movement of the needle shaft 310. Moreover, when the needle shaft 310 is subjected to external force, the ball 330 can help to more evenly transmit the force to the elastic member 200, thereby protecting the elastic member 200 and the needle shaft 310 from damage. In addition, the ball 330 can absorb the vibration caused by the movement of the needle shaft 310 to a certain extent, reducing the impact on other parts of the ejector pin 10.

[0045] In some embodiments, the first section 130 includes a first inner wall 131 and a second limiting portion 132 surrounding the needle shaft 310, and the first inner wall 131 is provided with a second limiting portion 132 protruding toward the needle shaft 310; the needle shaft 310 includes an internal section 311 and a movable section 312, the diameter of the internal section 311 is greater than the diameter of the movable section 312, the internal section 311 is arranged in the accommodating cavity 110, and the movable section 312 is passed through the first opening 120; when the needle shaft 310 extends out of the needle tube 100, the internal section 311 abuts against the second limiting portion 132, so that the internal section 311 is limited in the accommodating cavity 110. The needle shaft 310 includes two parts, the internal section 311 and the movable section 312, the first section 130 forms a first inner wall 131 around the needle shaft 310, and is provided with a second limiting portion 132 protruding. When the needle shaft 310 extends out of the needle tube 100, the second limiting portion 132 prevents the built-in section 311 from further moving, ensuring that the built-in section 311 will not escape from the needle tube 100 due to external force, thereby preventing the needle shaft 310 from over-stretching.

[0046] It is understandable that the second stopper 132 may need to be manufactured by riveting or other processes during the manufacturing process. The large diameter of the first section 130 can provide a larger surface area to withstand the riveting pressure. During the riveting process, the force can be more evenly distributed on the surface of the first section 130, thereby reducing stress concentration points and reducing the risk of deformation of the needle tube 100.

[0047] In some embodiments, the side of the needle shaft 310 away from the ball 330 may be an arc surface. When the conductive component abuts the arc surface, the arc surface design may help to fit the conductive component more closely, thereby reducing contact resistance and improving conductive efficiency. The conductive component may also be provided with an arc surface groove for abutting the arc surface to increase the contact area, thereby reducing stress concentration and improving the stability of the electrical connection.

[0048] The embodiment of the present application provides an electronic device, including a receiving member and an ejector pin 10. The receiving member is provided with a receiving groove, and the ejector pin 10 is the ejector pin 10 of any of the above embodiments, and the ejector pin 10 is interference-fitted with the receiving groove through a first limiting portion 151.

[0049] A receiving groove is provided on the receiving part of the electronic device for installing and fixing the ejector pin 10. By designing the diameter of the first limiting portion 151 to be slightly larger than the diameter of the receiving groove, the first limiting portion 151 and the receiving groove form an interference fit, thereby achieving tight fixation, maintaining the position of the ejector pin 10, and preventing displacement or falling off due to external force.

[0050] In some embodiments, the receiving member includes a groove side wall and a groove bottom wall forming the receiving groove, the groove side wall includes a first surface away from the groove bottom wall; the first section 130 includes a second surface 135 away from the third section 170, and the second surface 135 is flush with the first surface.

[0051] The receiving groove is used to place the ejector pin 10, ensuring that the entire needle tube 100 is stably fixed in the electronic device. The first surface of the groove side wall is the outermost portion of the groove side wall, and contacts the first section 130 of the ejector pin 10. The second surface 135 of the first section 130 is also the outermost portion of the first section 130, and contacts the first surface of the groove side wall of the receiving groove. The second surface 135 is flush with the first surface, so that the outer portion of the first section 130 of the ejector pin 10 is on the same plane as the outer portion of the groove side wall of the receiving groove. This flush fit helps ensure that the ejector pin is properly aligned in the receiving groove, provides stable support, and simplifies the assembly process because the ejector pin 10 can be more easily placed in the correct position, reducing performance issues caused by improper installation.

[0052] Exemplarily, the electronic device includes a first conductive component and a second conductive component, wherein the first conductive component includes a receiving member, and the receiving member of the first conductive component can completely receive the entire needle tube 100 of the ejector 10, and only a portion of the needle shaft assembly 300 protrudes from the receiving groove, effectively reducing the space required for the ejector 10, making the electronic device more compact, improving the space utilization efficiency of the electronic device, and providing additional protection for the ejector 10, reducing damage caused by impact or falling. When the second conductive component contacts and applies pressure to the needle shaft assembly 300, the needle shaft assembly 300 shrinks downward along the axial direction of the needle tube 100 under the action of elastic force, and the elastic force enables the needle shaft assembly 300 to be in close contact with the second conductive component, thereby ensuring the stability of the electrical connection between the first conductive component and the second conductive component, which is particularly important for portable electronic devices or electronic devices with limited space. For example, the electronic device may be an electronic cigarette, the first conductive component may be a cigarette rod of the electronic cigarette, the second conductive component may be a cigarette cartridge of the electronic cigarette, the cigarette rod may be provided with a receiving groove, the needle tube 100 of the ejector pin 10 is entirely disposed in the receiving groove and electrically connected to the cigarette rod, and only a portion of the needle shaft assembly 300 protrudes from the receiving groove. When in use, the user only needs to press down the cigarette cartridge so that the needle shaft assembly 300 contracts and abuts against the cigarette cartridge, and the cigarette cartridge is electrically connected to the needle shaft assembly 300, so that the cigarette rod and the cigarette cartridge can be stably electrically connected through the ejector pin 10, and the operation is simple.

[0053] Please refer to Figure 7 , Figure 7 Schematic diagram of the structure of the ejector in the related art. The needle tube 410 of the ejector 40 in the related art is also provided with a protrusion 420 around the first opening, which results in that when the ejector 40 is installed, the protrusion 420 of the ejector 40 and the needle shaft assembly 430 both protrude from the receiving groove of the receiving member. This design makes it possible for the needle shaft assembly 430 to be compressed into the protrusion 420 when the needle shaft assembly 430 is pressed down, but the existence of the protrusion 420 requires a space for the protrusion to be reserved between the cigarette rod and the cigarette cartridge, causing structural interference.

[0054] The ejector pin 10 of this embodiment avoids the need to set a protrusion at the first opening 120 by adopting a flat rivet structure (i.e., the second limiting portion 132). This flat rivet structure can effectively prevent the needle shaft assembly 300 from escaping from the needle tube 100. Since there is no need to set a protrusion at the first opening 120, the entire ejector pin 10 can only have the needle shaft assembly 300 protruding from the receiving groove, and the receiving groove can completely accommodate the entire needle tube 100 of the ejector pin 10. When pressed down, the needle shaft assembly 300 also shrinks into the needle tube 100. There is no need to reserve space for the protrusion between the cigarette rod and the cigarette cartridge, and no structural interference will be caused. The cigarette rod and the cigarette cartridge can be directly and tightly connected, thereby using the space more compactly and effectively shortening the connection space required for the cigarette rod and the cigarette cartridge. This embodiment solves the space occupation and structural interference problems in the related art by eliminating the protrusion and adopting a flat rivet structure, which helps to reduce the volume of the electronic cigarette.

[0055] The ejector pin and the electronic device provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. 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 methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A ejector pin, characterized in that: include: A needle tube, provided with a receiving cavity and a first opening which are communicated with each other; An elastic member, disposed in the accommodating cavity; a needle shaft assembly, at least partially disposed in the accommodating cavity, the needle shaft assembly being capable of moving along the axial direction of the needle tube, one end of the needle shaft assembly being in contact with the elastic member, and the other end of the needle shaft assembly being capable of extending from the first opening; Wherein, the needle tube includes a first section, a second section and a third section connected in sequence, the first section is provided with the first opening, the diameter of the first section is larger than the diameter of the second section, the diameter of the second section is larger than the diameter of the third section, and the second section is provided with a first limiting portion protruding from the outer wall of the accommodating cavity.

2. The ejector pin according to claim 1, characterized in that: The first limiting portion is arranged around the second section.

3. The ejector pin according to claim 1 or 2, characterized in that: The first limiting portion includes a top edge facing the first section, a bottom edge facing the third section, and an intermediate edge connected between the top edge and the bottom edge, the bottom edge is inclined relative to the outer wall of the second section, and the top edge is perpendicular to the outer wall of the second section.

4. The ejector pin according to claim 1, characterized in that: The third section includes a connecting portion connected to the second section, and a diameter of the connecting portion gradually decreases in a direction away from the first section.

5. The ejector pin according to claim 4, characterized in that: The third section includes a tail end portion away from the second section, and a diameter of the tail end portion gradually decreases in a direction away from the first section.

6. The ejector pin according to claim 1, characterized in that: The first section, the second section and the third section are flush with the inner wall of the accommodating cavity.

7. The ejector pin according to claim 1, characterized in that: The needle shaft assembly includes a needle shaft and a ball. The ball is arranged in the accommodating cavity and abuts against the elastic member. The needle shaft abuts against the side of the ball away from the elastic member and passes through the first opening.

8. The ejector pin according to claim 7, characterized in that: The first section includes a first inner wall surrounding the needle shaft and a second limiting portion, and the first inner wall is provided with the second limiting portion protruding toward the needle shaft; The needle shaft includes a built-in section and a movable section, the diameter of the built-in section is larger than the diameter of the movable section, the built-in section is arranged in the accommodating cavity, and the movable section is passed through the first opening; When the needle shaft extends out of the needle tube, the built-in section abuts against the second limiting portion, so that the built-in section is limited in the accommodating cavity.

9. An electronic device, characterized in that: include: A receiving member having a receiving groove; An ejector pin according to any one of claims 1 to 7, wherein the ejector pin is disposed in the receiving groove, and the ejector pin is interference-fitted with the receiving groove through the first limiting portion.

10. The electronic device according to claim 9, characterized in that: The receiving member comprises a groove side wall and a groove bottom wall forming the receiving groove, and the groove side wall comprises a first surface away from the groove bottom wall; The first segment includes a second surface distal from the third segment, the second surface being flush with the first surface.

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