Connection pin having upper and lower sliding contact

Abstract

The integral connecting pin having a ring according to the present invention is an integral connecting pin manufactured by processing a metal plate and formed integrally, comprising: a first plunger (10) having a first contact portion (10b) formed on one side for contacting the outside; a first elastic portion (30) having a ring-shaped spring and one side connected to the other side of the first plunger (10); a second elastic portion (40) having a U-shaped spring and one side connected to the other side of the first elastic portion (30); and a base portion (50) connected to the other side of the second elastic portion (40).

Description

Technology Field

[0001] The present invention relates to an integrated connecting pin in which the upper and lower parts make sliding contact. Background Technology

[0002] In electronic devices and electrical systems, various types of connecting pins are used for electrical connections between different circuits or components. Mounted in sockets or similar devices, these connecting pins enable the attachment and detachment of components while withstanding mechanical shock and vibration, ensuring that electrical contact is maintained robustly.

[0003] Conventional connecting pins were primarily manufactured by assembling multiple components. The parts were fabricated separately and then completed through an assembly process. This multi-component structure involves a complex manufacturing process and requires significant assembly time; furthermore, the presence of contact resistance between components leads to a degradation in electrical performance.

[0004] In addition, many conventional connecting pins have a structure that separately includes a coil spring or the like to provide elastic restoring force. This increases the number of parts and the overall size, and poses a significant constraint in high-density mounting environments where a large number of connecting pins must be placed in a narrow space.

[0005] As such, there have been attempts to construct a single-piece connecting pin to overcome the disadvantages of multi-part connecting pins. However, while it is necessary to improve electrical conductivity and corrosion resistance by plating the surface of the connecting pin, conventional single-piece connecting pins have a problem in that there are structural parts that are difficult to plate.

[0006] In addition, conventional integrated connecting pins are equipped with a part that performs the function of a spring; however, due to the impedance of this spring-functioning part, there is a problem in that unwanted impedance is added to the electrical connection path of the connecting pin or the electrical impedance between the two ends is not small. The problem to be solved

[0007] The objective of the present invention is to provide an integrated pogo pin that is easy to plating.

[0008] Another objective of the present invention is to provide an integrated pogo pin that eliminates or significantly reduces the impedance addition of the spring function part. means of solving the problem

[0009] An integral connecting pin having a ring according to one aspect of the present invention is an integral connecting pin manufactured by processing a metal plate and formed integrally, comprising: a first plunger (10) having a first contact portion (10b) formed on one side for contacting the outside; a first elastic portion (30) having a ring-shaped spring and one side connected to the other side of the first plunger (10); a second elastic portion (40) having a U-shaped spring and one side connected to the other side of the first elastic portion (30); and a base portion (50) connected to the other side of the second elastic portion (40).

[0010] In the integrated connecting pin having the above-described ring, the first plunger (10) has a first bar-shaped portion (10a) between the first contact portion (10b) and the first elastic portion (30), and the base portion (50) has a second bar-shaped portion (50a) in a position facing the first bar-shaped portion (10a), and when the connecting pin is inserted into the socket, the first bar-shaped portion (10a) and the second bar-shaped portion (50a) can slide against each other while in contact.

[0011] In the integral connecting pin having the above-described ring, the socket is provided with a vertical groove (h1) into which the second elastic part (40) is inserted, and when the U-shaped spring of the second elastic part (40) is inserted into the vertical groove (h1), the angle of opening of the U-shaped spring is reduced, and the first bar-shaped part (10a) and the second bar-shaped part (50a) can be pressed together.

[0012] In the integral connecting pin having the above-described ring, the first plunger (10) and the first base part (50) are spaced apart when in a free state before being inserted into the socket, thereby facilitating plating.

[0013] In the integral connecting pin having the above-described ring, the distance and angle between the first bar-shaped part (10a) and the second bar-shaped part (50a) can be set so that during the process of insertion into the socket, the contact area between the first bar-shaped part (10a) and the second bar-shaped part (50a) is increased from the outside to the inside.

[0014] In the integral connecting pin having the above-described ring, when in a free state before being inserted into the socket, the angle (A1) formed by the outer side of the second bar-shaped part (50a) and the first bar-shaped part (10a) with respect to the center of rotation of the U-shaped spring may be smaller than the angle (A2) formed by the inner side of the second bar-shaped part (50a) and the first bar-shaped part (10a).

[0015] In the integrated connecting pin having the above-described ring, a second contact portion (20a) that contacts the outside is formed on one side, and a second plunger (20) that is connected to the base portion (50) on the other side may be further included.

[0016] In the integral connecting pin having the above-described ring, the first plunger (10), the first elastic part (30), and the second plunger (20) may be on the same axis when viewed from the front.

[0017] In the integrated connecting pin having the above-described ring, a latch (71) is further provided, which is connected to the side of the base part (50) and extends obliquely outwardly, and bends elastically toward the base part (50) when the connecting pin is inserted into the socket, and after the connecting pin is inserted into the socket, the free end of the latch (71) is caught on the first step (111) of the socket (100) to restrict movement in the first direction.

[0018] In the integral connecting pin having the above-described ring, a first stopper (73) protruding from the side of the connecting part (60) connecting the first elastic part (30) and the second elastic part (40) is further provided, or a second stopper (72) protruding from the side of the base part (50) is further provided, and after the connecting pin is inserted into the socket, the first stopper may catch on the second step (112) of the socket (100) or the second stopper may catch on the third step (113) of the socket (100) to restrict movement in the opposite direction of the first direction.

[0019] In the integral connecting pin having the above-described ring, the first stopper (73) and the second stopper (72) may be located further down than the bottom of the first elastic part (30). Effects of the invention

[0020] According to the integrated connecting pin with a ring of the present invention, since it is manufactured as a single unit by processing a metal plate, the manufacturing process is simple and productivity is improved, and assembly between parts is unnecessary, thereby reducing manufacturing costs.

[0021] According to the integrated connecting pin having a ring of the present invention, the first plunger and the base portion are spaced apart in the free state, so the plating solution can come into uniform contact with all surfaces, thereby facilitating the plating process and improving the plating quality.

[0022] According to the integrated connecting pin having a ring of the present invention, when inserted into a socket, the contact area between the first bar-shaped part and the second bar-shaped part is large. In addition, most of the electrical signal is transmitted between the first plunger, the base part, and the second plunger, and since the amount transmitted through the ring-shaped spring is extremely small, there is an effect of eliminating or significantly reducing the impedance addition of the spring function part.

[0023] According to the integrated connecting pin with a ring of the present invention, the ring-shaped spring provides excellent elastic restoring force and responds stably to external pressure, thereby improving electrical contact reliability.

[0024] According to the integrated connecting pin having a ring of the present invention, after insertion into the socket as a latch and stopper, it is prevented from coming off in both directions and the floating distance can be limited, and it has the effect of being able to be manufactured as a single-body socket. Brief explanation of the drawing

[0025] FIG. 1 is a perspective view of an integrated connecting pin according to one embodiment of the present invention. FIG. 2 is a perspective view of an integrated connecting pin in a different direction according to one embodiment of the present invention. FIG. 3 is a side view of an integrated connecting pin according to one embodiment of the present invention. FIG. 4 is a front view of an integrated connecting pin according to one embodiment of the present invention. FIG. 5 is a perspective view showing an integrated connecting pin according to one embodiment of the present invention mounted in a socket. FIG. 6 is a cross-sectional view of a socket cut vertically with an integrated connecting pin according to one embodiment of the present invention mounted on the socket. FIG. 7 is an integrated connecting pin according to an embodiment of the present invention, FIG. 7(a) is in a free state before mounting, FIG. 7(b) is in a state before external force is applied after mounting, and FIG. 7(c) is in a state pressed by external force after mounting. FIG. 8 is a perspective view illustrating the internal space of a socket according to one embodiment of the present invention. FIG. 9 is a top view illustrating the internal space of a socket according to one embodiment of the present invention. Specific details for implementing the invention

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. In describing the present invention, specific descriptions of related known functions or configurations are omitted if it is determined that such detailed descriptions may unnecessarily obscure the essence of the present invention.

[0027] FIG. 1 is a perspective view of an integrated connecting pin according to one embodiment of the present invention, FIG. 2 is a perspective view of an integrated connecting pin according to one embodiment of the present invention in a different direction, FIG. 3 is a side view of an integrated connecting pin according to one embodiment of the present invention, and FIG. 4 is a front view of an integrated connecting pin according to one embodiment of the present invention.

[0028] Referring to FIGS. 1 to 4, an integral connecting pin (1) having a ring according to one embodiment of the present invention comprises a first plunger (10), a second plunger (20), a first elastic part (30), a second elastic part (40), a base part (50), a connecting part (60), and a position limiting means (70: 71, 71, 73).

[0029] The integrated connecting pin (1) of the present invention is manufactured by processing a metal plate. As the metal plate, metal materials with excellent electrical conductivity and elasticity, such as copper, copper alloy, brass, phosphor bronze, beryllium copper, and stainless steel, may be used. The metal plate is processed by methods such as punching, bending, blanking, coining, notching, and plating. Since it is manufactured as an integrated unit, a separate parts assembly process is unnecessary, thereby improving productivity. The surface of the connecting pin is subjected to plating treatment to improve electrical conductivity and corrosion resistance. Gold (Au), silver (Ag), nickel (Ni), tin (Sn), etc., may be used as plating materials, and a multi-layer plating structure is also possible.

[0030] The first plunger (10) is located at the upper part of the integral connecting pin (1) in the drawing (hereinafter, based on the drawing, it may be referred to as the lower part, upper part, etc., and if the connecting pin is viewed upside down, this positional relationship may be reversed). The first plunger (10) includes a first contact part (10b) and a first bar-shaped part (10a). The first contact part (10b) is formed at one end of the first plunger (10) and provides an electrical connection (contact) by contacting an external electrical terminal or a pad of a circuit board. The first contact part (10b) can be formed in various shapes to suit the purpose of use. For example, it can have various shapes such as a pointed protrusion, a flat surface, a convex curved surface, multiple protrusions, or a crown shape. The first bar-shaped portion (10a) is located between the first contact portion (10b) and the first elastic portion (30) and has a structure that extends in a bar shape. The position and inclination of the first bar-shaped portion (10a) are designed considering the contact characteristics with the second bar-shaped portion (50a) to be described later.

[0031] In a free state before being inserted into a socket (wherein the socket includes not only a semiconductor package but also a body of any shape on which a connecting pin is mounted), the first plunger (10) and the base portion (50) are spaced apart, and thus the first bar-shaped portion (10a) and the second bar-shaped portion (50a) are also spaced apart. This spacing allows the plating solution to access all surfaces during the plating process, thereby improving the plating quality. The base portion (50) has an appropriate size and shape to be stably positioned inside the socket (100).

[0032] When the connecting pin is inserted into the socket (100; FIG. 6), the first bar-shaped portion (10a) of the first plunger (10) comes into contact with the second bar-shaped portion (50a) of the base portion (50). In particular, the first bar-shaped portion (10a) and the second bar-shaped portion (50a) are treated with plating so that electrical conductivity is maximized during sliding contact.

[0033] The second plunger (20) is located at the bottom of the integral connecting pin (1) and is connected to the base portion (50) to provide contact with another external electrical connection path on the opposite side of the first plunger (10). The second plunger (20) includes a second contact portion (20a). The second contact portion (20a) is formed at one end of the second plunger (20) and provides electrical connection (contact) by contacting an external electrical terminal or a pad of a circuit board. The shape of the second contact portion (20a) may be the same as or different from the first contact portion (10b), and depending on the application, it may have various shapes such as a pointed protrusion, a flat surface, a convex curved surface, multiple protrusions, or a crown shape.

[0034] The second plunger (20) is integrally connected to the base portion (50) and is positioned on the same axis as the first plunger (10) and the first elastic portion (30) when viewed from the front (hereinafter, the y-axis direction is referred to as the front and the x-axis direction as the side) (see FIG. 4). This structural arrangement improves pointing accuracy when the connecting pin is compressed by contact targets on both sides. In particular, in the present invention, the center of the first elastic portion (ring-shaped spring) (30) is also configured to coincide with the center of the first plunger and the second plunger when viewed from the front. The lengths of the first plunger and the second plunger are appropriately set according to the depth of the socket and the position of the external connection target. In this embodiment, the first plunger (10) and the second plunger (20) have a length that allows them to protrude outward through the upper and lower openings of the socket and come into contact with an external terminal or pad, etc.

[0035] The first elastic part (30) is connected to the other side of the first plunger (10) and has a ring-shaped spring. The first elastic part (30) provides an elastic restoring force to elastically support the first plunger (10) when it descends under external pressure, and to restore it to its original position when the pressure is removed. The first elastic part (30) provides an elastic restoring force when both ends of the external protrusion of the connecting pin (first contact part and second contact part) are compressed.

[0036] Ring springs are formed from metal strips that are circular or elliptical, or they may be slightly deformed. The elastic modulus is determined by the diameter, thickness, width, and material of the ring spring, and is designed according to the required contact pressure and stroke.

[0037] Since the ring-shaped spring of the first elastic part (30) is manufactured as an integral structure, there is no need to assemble a separate coil spring or leaf spring, so the structure is simple and highly reliable. The bottom of the first elastic part (30) serves as a positional reference for the first stopper (73) or the second stopper (72), and these stoppers are positioned further down than the bottom of the first elastic part (30) to provide an appropriate space for the first elastic part to operate when inserted into the socket.

[0038] The second elastic part (40) is connected to the other side of the first elastic part (30), and can be connected directly or, as in the embodiment, connected with a connecting part (60) interposed in the middle. The second elastic part (40) is equipped with a U-shaped spring. The U-shaped spring of the second elastic part (40) can also be described as having a "C" shape. In a free state before being inserted into the socket, both arms have a wider angle, but when inserted into the socket, the U-shaped spring is compressed by the vertical groove (h1; FIG. 6) of the socket, and the angle is reduced, and accordingly, the first bar-shaped part (10a) and the second bar-shaped part (50a) are pressed against each other.

[0039] The U-shaped spring of the second elastic part (40) allows for elastic angle adjustment between its two arms and is deformed during the insertion process into the socket. This allows for a change in the relative position between the first plunger (10) (and the first spring part) and the base part (50). In the free state, the angle of the U-shaped spring is large, and when inserted into the socket, the angle is reduced, allowing the first plunger (10) to come into contact with the base part (50). The U-shaped spring of the second elastic part (40) can be deformed into a "V" shape, an "Ω" shape, etc.

[0040] The base portion (50) is connected to the other side of the second elastic portion (40). The base portion (50) includes a second bar-shaped portion (50a) and provides a base (foundation) to which the second elastic portion (40), the position limiting means (70), and the second plunger (20) are connected. The second bar-shaped portion (50a) is formed at a position facing the first bar-shaped portion (10a) and has a structure that extends in a bar shape. The second bar-shaped portion (50a) contacts the first bar-shaped portion (10a) to form the shortest electrical path from the connecting pin. When the connecting pin (1) is inserted into the socket, the U-shaped spring of the second elastic portion (40) is compressed, and the first bar-shaped portion (10a) and the second bar-shaped portion (50a) come into contact. In this state, when external pressure is applied to the first plunger (10) (between the first plunger and the second plunger), mutual sliding occurs between the first bar-shaped part (10a) and the second bar-shaped part (50a) while maintaining contact. Sliding contact means that the contact area changes as the surfaces of the first bar-shaped part (10a) and the second bar-shaped part (50a) slide against each other. The base part, the latch, and the second plunger are on the same plane.

[0041] The connecting part (60) is a part that connects the first elastic part (30) and the second elastic part (40). The connecting part (60) is integrally formed from a metal plate and maintains a connection between the ring-shaped spring of the first elastic part (30) and the U-shaped spring of the second elastic part (40), and interconnects the first elastic part and the second elastic part so that they can be misaligned when viewed from the front.

[0042] A first stopper (73) may be formed protruding from the side of the connecting portion (60). The first stopper (73) has a structure that protrudes outward from the side of the connecting portion (60) and, after the connecting pin (1) is inserted into the socket (100), catches on the second step (112; see FIG. 8) of the socket (100) to restrict the connecting pin (1) from moving downward.

[0043] The position limiting means (70) is intended to stably limit the position of the connecting pin (1) after it is inserted into the socket (100) and to prevent the connecting pin from moving outward. The position limiting means (70) is configured to include a latch (71), a second stopper (72), and a first stopper (73).

[0044] One end of the latch (71) is connected to the side of the base part (50) and extends obliquely outward (upward direction). The latch (71) is formed by processing a metal plate-shaped material to form a slit between it and the base part (50), excluding the connection point with the base part (50), and then bending the free end laterally, and has elasticity.

[0045] When the connecting pin (1) is inserted into the socket (100), the latch (71) comes into contact with the inner wall of the socket (100) and bends elastically toward the base portion (50). As the connecting pin (1) is inserted, the free end of the latch (71) passes through the first step (111; see FIG. 8 and FIG. 9) of the socket (100) and then spreads outward again in the lateral direction due to elastic restoring force. Even if the connecting pin is subsequently moved upward, it catches on the first step (111). This locking structure restricts the connecting pin (1) from moving upward (hereinafter referred to as the 'first direction'). Since the free end of the latch (71) catches on the first step (111), the connecting pin (1) does not easily come out of the socket.

[0046] The second stopper (72) has a structure that protrudes from the side of the base part (50) opposite the latch. After the connecting pin (1) is inserted into the socket (100), the second stopper (72) catches on the third step (113) of the socket (100) to restrict movement in the downward direction (opposite direction of the first direction). The first stopper (73) protrudes from the side of the connecting part (60) and catches on the second step (112) of the socket (100) to restrict movement of the connecting pin (1). The first stopper (73) performs a function similar to that of the second stopper (72) and stably maintains the position of the connecting pin (1). The first stopper (73) and the second stopper (72) are located further below the bottom of the first elastic part (30). The purpose is to ensure that the elastic deformation of the first elastic part (30) is not interfered with, and that it can be caught on the step of the socket (100) at an appropriate position. The combination of the catch (71) and the stoppers (72, 73) stably restricts the position of the connecting pin (1) in both directions so that the connecting pin (1) does not detach from the socket (100).

[0047] FIG. 5 is a perspective view showing the state in which an integrated connecting pin according to an embodiment of the present invention is mounted in a socket, and FIG. 6 is a cross-sectional view of the socket cut vertically. FIG. 7 shows the operating state of an integrated connecting pin according to an embodiment of the present invention, where FIG. 7(a) is the free state before mounting, FIG. 7(b) is the state after mounting before an external force is applied, and FIG. 7(c) is the state after mounting when compressed by an external force. FIG. 8 is a perspective view showing the internal space in which a single connecting pin is mounted in the socket (100), and FIG. 9 is a perspective view seen from above.

[0048] In FIGS. 5 and 6, only three connecting pins are shown mounted on the socket, but in reality, hundreds to thousands of connecting pins can be mounted on the socket. Additionally, for ease of understanding, FIGS. 5 and 6 show, in the same drawing, the situation before the connecting pin (1) is mounted on the socket (100), the situation after the connecting pin (1) is mounted on the socket (100) but no external force is applied, and the situation after an external force is applied, respectively.

[0049] The socket (100) has an internal space into which a connecting pin (1) is inserted, and the internal space is configured to include a vertical groove (h1) into which a second elastic part is seated, a base groove (h3) into which the upper part of a base part is seated, and a spring groove (h2) that provides an operating space for the first elastic part. In addition, structures such as a first step (111), a second step (112), and a third step (113) are formed to provide a position limiting function in alignment with a position limiting means.

[0050] A vertical groove (h1) is formed on the inner wall of the socket (100) and provides a space into which a U-shaped spring of the second elastic part (40) is inserted. The width of the vertical groove (h1) is sufficient to allow the insertion of the U-shaped spring while also allowing both arms of the U-shaped spring to be compressed. When the connecting pin (1) is inserted into the socket (100), the U-shaped spring of the second elastic part (40) is inserted into the vertical groove (h1) and compressed by the inner wall surface of the vertical groove (h1). Accordingly, the spread angle of the U-shaped spring is reduced, and the first bar-shaped part (10a) and the second bar-shaped part (50a) are brought closer together and then pressed together. In the base groove (h3), a trench that holds the base part is formed extending vertically on the opposite side of the first step.

[0051] The first step (111) is a stepped structure formed on the inner wall of the socket (100) and provides a position where the free end of the latch (71) is engaged. The first step (111) serves to restrict the upward movement of the connecting pin (1).

[0052] The second step (112) provides a position where the first stopper (73) engages, and the third step (113) provides a position where the second stopper (72) engages. These steps restrict the connecting pin (1) from moving downward beyond a predetermined position.

[0053] Referring to FIG. 7, before the connecting pin (1) is inserted into the socket (100), the first plunger (10) and the base part (50) are separated while no external force is applied to the connecting pin, and the first bar-shaped part (10a) and the second bar-shaped part (50a) are also separated from each other. The ring-shaped spring of the first elastic part (30) and the U-shaped spring of the second elastic part (40) maintain a natural state without elastic deformation. In particular, plating is possible up to the part that will become the contact surface between the first bar-shaped part (10a) and the second bar-shaped part (50a).

[0054] Additionally, when viewed from the center of rotation of the U-shaped spring in the free state (the center of rotation where the two arms rotate relative to each other), the angle (A1) formed by the outer side of the second bar-shaped part (50a) and the first bar-shaped part (10a) (referring to the side closer to the first contact part, and from another perspective, the side further from the center of the connecting pin) is designed to be smaller than the angle (A2) formed by the inner side (see FIG. 3 and FIG. 7). Since the second bar-shaped part (50a) and the first bar-shaped part (10a) are straight as the word 'bar' implies, the angle between the second bar-shaped part (50a) and the first bar-shaped part (10a) eventually increases gradually as it goes inward. This angle setting ensures that during the process of insertion into the socket (100), the first bar-shaped part (10a) and the second bar-shaped part (50a) first make contact from the outside, and then the contact area gradually increases inward.

[0055] Also, even when the connecting pin is inserted, the connecting part (60) and the first elastic part (30) are not made to come into contact with the base part, so as not to interfere with the pressure welding between the second bar-shaped part (50a) and the first bar-shaped part (10a).

[0056] In FIG. 7(b), the connecting pin (1) is inserted into the socket (100) and the latch (71) and stoppers (72, 73) are positioned by the shoulder of the socket (100), but no external pressure is applied to the first plunger (10). The latch (71) is engaged with the first shoulder (111) to prevent the connecting pin (1) from coming out in an upward direction, and the first stopper (73) or the second stopper (72) is engaged with the second shoulder (112) or the third shoulder (113) to prevent the connecting pin (1) from coming out in a downward direction. In the space limited by the latch (71) and the first step (111), and the first stopper (73) / second stopper (72) and the second step (112) / third step (113), the connecting pin (1) becomes a floating state where slight movement is possible when it overcomes the frictional force caused by the elastic force of the second elastic part.

[0057] One of the important features of the present invention is that the contact area between the first bar-shaped part (10a) and the second bar-shaped part (50a) gradually increases from the outside to the inside during the process of insertion into the socket (100). This is achieved by appropriately setting the spacing distance and angle between the first bar-shaped part (10a) and the second bar-shaped part (50a). As previously described, the angle (A1) formed by the outside of the second bar-shaped part (50a) and the first bar-shaped part (10a) in the free state is smaller than the angle (A2) formed by the inside of the second bar-shaped part (50a) and the first bar-shaped part (10a).

[0058] When the connecting pin (1) begins to be inserted into the socket (100), the U-shaped spring is compressed by the vertical groove (h1), bringing the first bar-shaped part (10a) and the second bar-shaped part (50a) closer to each other. Due to the angle relationship, the outer part comes into contact first, and as insertion proceeds, the contact area expands inward.

[0059] When contact is made all the way to the inside, a wide contact area is formed overall, reducing contact resistance and increasing current capacity.

[0060] On the other hand, assuming contact starts from the inside, linear contact occurs only at the point where contact first occurred, making it difficult to expand into surface contact.

[0061] FIG. 7(c) shows a state in which an external force from an external device or component presses both ends of the connecting pin, causing compression. When the first plunger (10) moves downward, the ring-shaped spring of the first elastic part (30) undergoes elastic deformation, causing a deformation in which the radius of the ring-shaped spring increases. At the same time, sliding occurs between the first bar-shaped part (10a) and the second bar-shaped part (50a) while maintaining contact. During the sliding process, the contact area between the first bar-shaped part (10a) and the second bar-shaped part (50a) changes, but plays an important role in maintaining stable electrical contact.

[0062] Even during the compression and expansion process of the connecting pin due to external force, the contact between the first bar-shaped part (10a) and the second bar-shaped part (50a) is maintained, so a low-resistance electrical connection is maintained.

[0063] Furthermore, the integrated connecting pin with a ring according to the present invention has a structure that applies pressure in a downward direction by converting the vector direction of a portion of the vertical force pressing from above by 360 degrees. In addition, the integrated connecting pin with a ring according to the present invention has a mechanical characteristic that converts the vector direction of a portion of the vertical force pressing from above by 90 degrees to the direction of the upper wall of the base part and makes contact. When a situation arises such as when a semiconductor chip is mounted, the contact pressure between the base part and the first plunger is further increased.

[0064] The integrated connecting pin (1) of the present invention provides excellent electrical characteristics. First, the surface resistance is reduced because the plating process is performed uniformly. Since it has a spaced structure in the free state, the plating solution can access all surfaces, so the thickness and quality of the plating layer are uniform. Second, the contact resistance is reduced due to the large contact area between the first bar-shaped part (10a) and the second bar-shaped part (50a). Since contact resistance is inversely proportional to the contact area, a large contact area means low contact resistance.

[0065] Third, the first elastic part for providing elasticity has an impedance addition effect similar to a coil of approximately one turn, which is an unwanted impedance. Separately, direct electrical contact between the first bar-shaped part (10a) and the second bar-shaped part (50a) is ensured, thereby eliminating or significantly reducing the impedance addition effect caused by the first elastic part (ring-shaped spring). Since the contact area between the first bar-shaped part and the second bar-shaped part is large and most electrical signals are transmitted between the first plunger - base part - second plunger, and the signal (current) transmitted through the ring-shaped spring is extremely weak, there is an effect of excluding or significantly reducing the impedance addition of the spring function part.

[0066] Fourth, since the curvature of the ring-shaped spring that provides elasticity, or the part connected to the ring-shaped spring, is relatively large, stress concentration is small, so it is possible to manufacture an integrated pogo pin with good durability that can withstand repeated compression and elongation. Explanation of the symbols

[0067] 1: Integrated connecting pin 10: First plunger 10a: First bar-shaped part 10b: First contact part 20: Second plunger 20a: Second contact part 30: 1st elastic part 40: 2nd elastic part 50: Base part 50a: Second bar-shaped part 60: Connection part 70: Position limiting means 71: Latch 72: Second stopper 73: 1st Stopper 100: Socket 111: 1st step 112: 2nd step 113: 3rd step h1: Vertical groove

Claims

Claim 1 An integral connecting pin manufactured by processing a metal plate and formed integrally, comprising: a first plunger (10) having a first contact portion (10b) formed on one side for contacting the outside; a first elastic portion (30) having a ring-shaped spring and one side of which is connected to the other side of the first plunger (10); a second elastic portion (40) having a U-shaped spring; and a connecting portion (60) connecting the other side of the first elastic portion (30) and one side of the second elastic portion (40). It is configured to include a base part (50) connected to the other side of the second elastic part (40); and when viewed from the front, the connecting part (60) is interconnected to allow an offset position between the first elastic part (30) and the second elastic part (40); the first plunger (10) is provided with a bar-shaped first bar-shaped part (10a) between the first contact part (10b) and the first elastic part (30); the base part (50) is provided with a bar-shaped second bar-shaped part (50a) at a position facing the first bar-shaped part (10a); when a connecting pin is inserted into the socket, the first bar-shaped part (10a) and the second bar-shaped part (50a) are in contact and can slide against each other; and when in a free state before being inserted into the socket, when viewed with respect to the center of rotation of the U-shaped spring, the second An integrated connecting pin having a ring, characterized in that the angle (A1) formed by the outer side of the bar-shaped part (50a) and the first bar-shaped part (10a) is smaller than the angle (A2) formed by the inner side of the second bar-shaped part (50a) and the first bar-shaped part (10a). Claim 2 delete Claim 3 An integral connecting pin having a ring, wherein the socket is provided with a vertical groove (h1) into which the second elastic part (40) is inserted, and when the U-shaped spring of the second elastic part (40) is inserted into the vertical groove (h1), the spread angle of the U-shaped spring is reduced and the first bar-shaped part (10a) and the second bar-shaped part (50a) are pressed together. Claim 4 An integral connecting pin having a ring according to claim 3, wherein the first plunger (10) and the base part (50) are spaced apart when in a free state before being inserted into the socket, thereby facilitating plating. Claim 5 delete Claim 6 delete Claim 7 An integral connecting pin having a ring according to claim 1, further comprising a second contact portion (20a) formed on one side for contacting the outside and a second plunger (20) connected to the base portion (50) on the other side. Claim 8 In claim 7, the first plunger (10), the first elastic part (30), and the second plunger (20) are on the same axis when viewed from the front, forming an integral connecting pin having a ring. Claim 9 An integral connecting pin having a ring, wherein, in claim 1, one end is connected to the side of the base portion (50) and extends obliquely outward, and when a connecting pin is inserted into the socket, the latch (71) has elasticity and bends toward the base portion (50), and after the connecting pin is inserted into the socket, the free end of the latch (71) catches on the first step (111) of the socket to restrict movement in the first direction. Claim 10 An integral connecting pin having a ring according to claim 9, further comprising a first stopper (73) protruding from the side of the connecting portion (60) or a second stopper (72) protruding from the side of the base portion (50), wherein after the connecting pin is inserted into the socket, the first stopper catches on the second step (112) of the socket or the second stopper catches on the third step (113) of the socket to restrict movement in the opposite direction of the first direction. Claim 11 In claim 10, the first stopper (73) and the second stopper (72) are integral connecting pins having a ring located further below the bottom of the first elastic part (30).

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