An SOP small outline package test socket with a quick fixing structure

Abstract

The present application discloses an SOP small outline pin package test socket with a quick fixing structure, belonging to the technical field of semiconductor packaging and testing equipment, including a test socket and a quick fixing structure. A placement groove is provided at the top of the test socket, and a plurality of pin grooves are provided on both sides of the placement groove; the quick fixing structures are symmetrically arranged on both sides of the test socket, including a rotating shaft that penetrates the test socket, and a pressing member is vertically connected to the surface opposite the pin groove. The test socket is provided with a sector-shaped rotating groove that cooperates with the pressing member. A clamping protrusion is also provided on the outer surface of the rotating shaft, and an annular groove is correspondingly provided on the test socket. One end of the annular groove is provided with a locking space that cooperates with the clamping protrusion. A torsion spring is fixedly sleeved on the rotating shaft. By rotating the rotating shaft, the torsion spring can be switched back and forth between the free state and the rotating state, so that the SOP pins can be quickly fixed by rotating the rotating shaft, and the stability of the fixation can be ensured through the self-locking effect.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor packaging and testing equipment, and particularly to an SOP small outline package test socket with a quick fixing structure. Background Art

[0002] SOP (Small Outine p Package9) small outline package refers to a surface mount package in which gull-wing (L-shaped) leads are led out from two sides of the package. SOP is the most widely used surface mount package. The typical pin pitch is 1.27 mm (50 mil), and others are 0.65 mm and 0.5 mm. The number of pins is mostly 8 - 32.

[0003] The patent with the publication number CN217112615U discloses an integrated circuit package testing device. As the previous generation of package testing and fixing structure, it mainly fixes the corresponding pins of the integrated circuit by the extrusion of a pressing plate and a conductive sheet, and does not require an additional limiting mechanism. Although the structure is relatively simple, there are still some problems. For example, there are many external devices (T-shaped plate and pressing plate), which occupy a large space. Secondly, the fixing stability of the pins is poor. Summary of the Invention

[0004] The embodiment of the present application provides an SOP small outline package test socket with a quick fixing structure, which is not only more compact in structure and occupies less space, but also can quickly fix the SOP pins and effectively ensure the pressing stability through a self-locking design.

[0005] The embodiment of the present application provides an SOP small outline package test socket with a quick fixing structure, including a test socket and a quick fixing structure. The test socket has opposite first and second ends along the length direction. A placement groove is provided at the top of the test socket, and a plurality of pin grooves are symmetrically arranged on both sides of the placement groove;

[0006] The quick fixing structures are symmetrically arranged on both sides of the test socket and include a rotating shaft. The rotating shaft extends along the length direction of the test socket and penetrates through the test socket. A pressing member is vertically connected to the surface of the rotating shaft opposite to the pin groove. The test socket is provided with a sector-shaped rotating groove that cooperates with the pressing member. A convex is provided on the outer surface of the rotating shaft near the second end. An annular groove that cooperates with the convex is provided in the test socket. A locking space that cooperates with the convex is provided at one end of the annular groove. A torsion spring is fixedly sleeved on the surface of the rotating shaft between two adjacent pin grooves. The torsion spring has a free state and a rotating state. The test socket is provided with a torsion space for the torsion spring to twist. By rotating the rotating shaft, the torsion spring can be switched back and forth between the free state and the rotating state;

[0007] When the torsion spring is in a free state, the torsion spring restricts the rotating shaft to urge the pressing member to be located within the test base, and the clamping protrusion is located at one end of the annular groove away from the locking space.

[0008] By rotating the rotating shaft in the positive direction, the torsion spring is gradually converted to a rotating state until the pressing member presses the SOP pins located in the pin slots, and the clamping protrusion moves along the annular groove and is self-locked within the locking space; by rotating the rotating shaft in the reverse direction, the clamping protrusion overcomes the locking force of the locking space and disengages from the locking space, and under the action of the torsion spring, the rotating shaft automatically resets and the torsion spring is converted to the free state.

[0009] In a possible implementation manner, the quick-fixing structure further includes a quick-pressing nut, the quick-pressing nut is sleeved on the rotating shaft in a threaded fit manner at the first end, the quick-pressing nut is partially located within the test base, and guiding protrusions are symmetrically arranged on the outer surface of the part located within the test base. A limiting groove matching with the guiding protrusions is arranged along the length direction within the test base, so that the quick-pressing nut can move in a directional manner along the length direction, and based on the threaded fit relationship and the matching relationship between the clamping protrusion and the annular groove, the rotating shaft can rotate in a directional manner, wherein the two end positions of the limiting groove respectively match with the two end positions of the annular groove and match with the positions of the free state and the rotating state of the torsion spring.

[0010] In a possible implementation manner, the quick-pressing nuts in the quick-fixing structures on both sides are vertically connected with a linkage rod, and a guiding groove matching with the linkage rod is arranged along the length direction within the test base.

[0011] In a possible implementation manner, the rotating shaft includes a rotating section and a quick-change section. The rotating section is in threaded fit with the quick-pressing nut, the quick-change section is sleeved on the other end of the rotating section in a threaded fit manner, and the thread rotation directions at both ends of the rotating section are opposite. The clamping protrusion is arranged on the surface of the quick-change section, and the quick-change section is installed at the second end of the test base through a bearing. The test base is provided with a moving channel communicating the annular groove to the second end for the clamping protrusion to move.

[0012] In a possible implementation manner, the SOP small-outline pin package test base with the quick-fixing structure further includes a limiting base. A U-shaped groove for limiting the test base is arranged at the top of the limiting base, and the first end is close to the opening of the U-shaped groove.

[0013] In one possible implementation, a semiconductor cooling plate is installed at the bottom of the placement slot, and the test seat and the limit seat are provided with a heat conduction channel connected up and down opposite to the semiconductor cooling plate, and a cooling fan is installed at the bottom of the limit seat to dissipate the heat in the heat conduction channel.

[0014] In one possible implementation, a locking slope structure is provided between the annular groove and the locking space, and an inclination angle of the locking slope structure relative to the bottom of the annular groove is smaller than an inclination angle of the locking slope structure relative to the bottom of the locking space, so that the locking protrusion can form self-locking when it moves to the locking space.

[0015] In a possible implementation, the clamping member includes a clamping rod and a clamping plate, the clamping rod is vertically connected to the rotating shaft, the clamping plate is located on the inner side of the clamping rod and is connected to the clamping rod through an adapter plate, and the plane where the bottom of the clamping plate is located and the plane where the bottom of the clamping rod is located have a predetermined angle, so that when the clamping plate horizontally clamps the SOP pin in the pin slot, the clamping rod tilts obliquely upward.

[0016] In a possible implementation, the SOP small outline pin package test seat with a quick fixing structure also includes a spare fixing structure, the spare fixing structure includes a spare pressure rod symmetrically arranged just above one or more of the fan-shaped rotation grooves on both sides of the test seat, a locking block is arranged at the lower part of the spare pressure rod, the test seat is provided with a spare channel connected to the fan-shaped rotation groove in the height direction, the spare pressure rod cooperates with the spare channel to press down the clamping rod, the side wall of the spare channel is provided with a spare guide groove cooperating with the locking block, and the lower part of the spare guide groove is provided with a second locking space perpendicular to the spare channel at a predetermined position, so that when the locking block rotates and moves into the second locking space through the spare guide groove, the clamping plate just presses the surface of the SOP pin in the pin groove;

[0017] A pressure sensor is installed on the bottom surface of the clamping plate, and an alarm signal light connected to the pressure sensor by an electrical signal is installed on the test seat.

[0018] In one possible implementation, a pressing cap is provided at the top end of the spare pressure rod, and the pressing cap protrudes circumferentially from the spare pressure rod. A spring is sleeved on the spare pressure rod, and both ends of the spring abut between the pressing cap and the top of the test seat. A protective cover is also provided on the top of the test seat to protect the spare fixed structure.

[0019] Beneficial effects: Compared with the prior art, the SOP small outline pin package test socket with a quick fixing structure provided by the present application only needs to rotate the rotating shaft, so that the clamping protrusion moves along the annular groove to the locking space, and then the SOP pins in the pin groove can be quickly pressed by the pressing member. The structure is more compact and occupies less space. At the same time, based on the cooperation of the clamping protrusion and the locking space, self-locking can be formed, so that the pressing member can stably maintain the state of pressing the SOP pins, and the pressing stability is good, which can ensure the packaging test quality. In addition, only by rotating the rotating shaft in the reverse direction can the reset be carried out, and the operation is simple. Third, when the pressing member is located in the test socket, the torsion spring remains in the free state, which can avoid the torsion spring being always in the twisted state when not working, and thus can effectively extend the service life of the torsion spring;

[0020] Among them, through the threaded cooperation of the quick-pressure nut and the rotating shaft, the quick-pressure nut can be directly pressed to realize the quick fixation of the SOP pins by the pressing member, and the operation is simpler. At the same time, the two end positions of the limiting groove are respectively matched with the two end positions of the annular groove, and are also matched with the positions of the torsion spring in the free state and the rotating state, so that the quick-pressure nut can be directly pressed to the bottom to realize the quick fixation of the SOP pins, which can play an anti-fooling role. Among them, the annular groove and the limiting groove can also limit the torsion spring in the reverse direction to avoid the torsion spring rotating excessively and affecting the service life of the torsion spring;

[0021] Among them, by setting the rotating shaft as a split-connected rotating section and a quick-replacement section, the quick-replacement section can be flexibly replaced when the wear degree of the clamping protrusion is large and the accuracy is reduced. Thus, the quick maintenance of the test socket can be realized, and the maintenance cost can be reduced;

[0022] Among them, through the spare fixing structure, secondary pressing operation can be carried out when the pressing of the pressing plate fails, so as to ensure the packaging test efficiency and quality of the SOP pins, and can also play a role in monitoring the accuracy of the clamping protrusion, so as to remind to replace the quick-replacement section in time.

[0023] These and other objects, features and advantages of the present invention are fully embodied through the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The exploded structural schematic diagram of the SOP small outline pin package test socket with a quick fixing structure according to the present application is shown.

[0025] Figure 2 The partial cross-sectional structural schematic diagram of the test socket in the present application is shown.

[0026] Figure 3 The present application is shown Figure 2 The enlarged structural schematic diagram of part A in the present application, where the dotted line part is the state schematic diagram when the pressing plate presses the SOP pins.

[0027] Figure 4The cross-sectional structural schematic diagram of the cooperation between the rotating shaft and the sealing seat in the present application is shown.

[0028] Figure 5 The cross-sectional structural schematic diagram of the cooperation between the clamping protrusion and the annular groove in the present application is shown.

[0029] Figure 6 The structural schematic diagram of the test seat at the standby channel in the present application is shown. Detailed implementation manners

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variants. The basic principles defined in the following description of the present invention can be applied to other implementation manners, variants, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present invention.

[0031] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, the above terms should not be construed as limiting the present invention.

[0032] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" should not be construed as limiting the quantity.

[0033] Reference Figures 1 to 5 , an SOP small outline pin package test seat with a quick fixing structure is provided in an embodiment of the present application, including a test seat 10 and a quick fixing structure. The test seat 10 has opposite first end 11 and second end 12 along the length direction. At the same time, a placement groove 101 is provided at the top of the test seat 10, and a plurality of pin grooves 102 are symmetrically arranged on both sides of the placement groove 101 for placing SOP pins, such as 14-pin or 16-pin.

[0034] The quick fixing structure is symmetrically arranged on both sides of the test base 10, and includes a rotating shaft 20. The rotating shaft 20 extends along the length direction of the test base 10 and penetrates through the test base 10. At the same time, a pressing member is vertically connected to the surface of the rotating shaft 20 opposite to the pin slot 102. The pressing member includes a pressing rod 21 and a pressing plate 22 connected to the outer end of the pressing rod 21. Correspondingly, the test base 10 is provided with a fan-shaped rotating slot 103 that cooperates with the pressing rod 21 and the pressing plate 22, so that when the rotating shaft 20 rotates, the pressing rod 21 and the pressing plate 22 can swing directionally around the rotating shaft 20 in the fan-shaped rotating slot 103. In addition, a convex 23 is provided on the outer surface of the rotating shaft 20 near the second end 12. Correspondingly, an annular groove 104 that cooperates with the convex 23 is provided in the test base 10, and a locking space 105 that cooperates with the convex 23 is provided at one end of the annular groove 104. When the rotating shaft 20 rotates, the convex 23 rotates synchronously, and when it moves along the annular groove 104 to the locking space 105, automatic locking of the convex 23 can be achieved to prevent the convex 23 from moving. A torsion spring is fixedly sleeved on the surface of the rotating shaft 20 between two adjacent pin slots 102. At the same time, the torsion spring has a free state and a rotating state. The test base 10 is provided with a torsion space for the torsion spring to twist. By rotating the rotating shaft 20, the torsion spring can be switched back and forth between the free state and the rotating state. To ensure the structural strength of the test base 10, both the torsion spring and the torsion space are located on the side of the rotating shaft 20 away from the pin slot 102. In addition, torsion springs can also be arranged on the unused part of the rotating shaft 20 to extend the torsional stability and service life of the rotating shaft 20;

[0035] When the torsion spring is in the free state, the torsion spring restricts the rotating shaft 20 to urge the pressing rod 21 and the pressing plate 22 to be located in the test base 10. At the same time, the convex 23 is located at one end of the annular groove 104 away from the locking space 105. At this time, the SOP pins to be tested can be placed in place normally. In addition, when the test base 10 is not working, the torsion spring is in the free state and there is no torsion, so there is no fatigue damage, which can greatly extend the service life of the torsion spring;

[0036] By rotating the rotating shaft 20 in the positive direction, the torsion spring is gradually converted to the rotating state (gradually generating elastic potential energy) until the pressing plate 22 horizontally presses the SOP pins located in the pin slot 102, and at the same time, the convex 23 gradually moves along the annular groove 104 until it is self-locked in the locking space 105. In this way, the self-locking formed by the cooperation of the convex 23 and the locking space 105 can ensure the stability of the pressing plate 22 pressing the SOP pins, so as to ensure the test quality;

[0037] By rotating the rotary shaft 20 in the reverse direction, the clamping projection 23 is disengaged from the locking space 105 by overcoming the locking force of the locking space 105. Under the action of the torsion spring, the rotary shaft 20 automatically resets to convert the torsion spring to the free state. At this time, the tested SOP pins can be taken out and new SOP pins to be tested can be placed in.

[0038] Therefore, for the SOP small outline pin package test socket with a quick-fixing structure provided by the present application, only by rotating the rotary shaft 20 can the pressing plate 22 quickly press and fix the SOP pins. At the same time, based on the locking relationship between the clamping projection 23 and the locking space 105, the stability of the pressing plate 22 pressing the SOP pins can be ensured, thereby ensuring the package test quality. Moreover, the overall structure is compact and occupies a small space. The hardness of the clamping projection 23 is moderate and has a certain amount of compressive deformation. It will not be unable to rotate into the locking space 105 due to being too hard, nor will it easily disengage from the locking space 105 due to being too soft. A rubber material with moderate softness can be selected.

[0039] In one embodiment, the quick fixing structure also includes a quick press nut 24. The quick press nut 24 is sleeved on the rotating shaft 20 in a threaded manner at the first end 11, and the quick press nut 24 is partially located in the test seat 10, and a guide protrusion 241 is symmetrically provided on the outer surface of the part located in the test seat 10. Correspondingly, a limit groove 106 matching the guide protrusion 241 is provided in the test seat 10 along the length direction, so that the quick press nut 24 can be directional moved along the length direction, and based on the threaded matching relationship and the matching relationship between the clamping protrusion 23 and the annular groove 104, the rotating shaft 20 can be directional rotated, that is, when the quick press nut 24 is pressed externally, based on the threaded matching relationship and the matching relationship between the clamping protrusion 23 and the annular groove 104, the rotating shaft 20 will be directional rotated, thereby realizing the rapid fixation of the SOP pin, and the operation is very convenient. In addition, the two end positions of the limiting groove 106 are respectively matched with the two end positions of the annular groove 104, and are matched with the positions of the torsion spring in the free state and the rotation state, that is, when the guide protrusion 241 is located at the outermost end of the limiting groove 106, the torsion spring is in a free state, and the clamping protrusion 23 is located at the end away from the locking space 105, and when the guide protrusion 241 is located at the innermost end of the limiting groove 106, the torsion spring is in a rotation state, that is, the state when the clamping plate 22 clamps the SOP pin, and the clamping protrusion 23 is located in the locking space 105 to form self-locking, thereby the two states of the torsion spring can be limited by the limiting groove 106 and the annular groove 104, so that the quick-pressing nut 24 can be directly pressed to the bottom to complete the quick fixation of the SOP pin and form self-locking, the fixing stability is good, and it has an anti-fool effect, and the operation is simple, wherein the rotating shaft 20 can be rotated in the opposite direction of the second end 12 to unlock the self-locking state of the clamping protrusion 23.

[0040] During the specific operation process, the quick-pressing nuts 24 on both sides can be pressed separately to achieve separate fixation of the SOP pins on both sides, but this is prone to cause the tilting phenomenon of the rear fixed pins, which is easy to affect the clamping efficiency and the clamping quality. In addition, they can also be pressed simultaneously to achieve simultaneous fixation of the SOP pins on both sides, which may require two hands to operate simultaneously. Therefore, preferably, the quick-pressing nuts 24 in the quick fixing structure on both sides are vertically connected with a linkage rod 25, and at the same time, a guide groove 107 matching the linkage rod 25 is provided in the test seat 10 along the length direction. Therefore, there is no need to focus on the pressing speed and pressing timing of each quick-pressing nut 24, and one hand can complete the simultaneous fixation of the SOP pins on both sides without causing the problem of tilting of the SOP pins on any side, thereby ensuring the efficiency and quality of the clamping plate 22 clamping the SOP pins.

[0041] Considering that the self-locking effect formed by the cooperation of the clamping protrusion 23 and the locking space 105 has a great influence on the quick and firm clamping of the SOP pins by the pressing plate 22, during frequent operation, the clamping protrusion 23 may be worn, which affects the self-locking effect. Therefore, the rotating shaft 20 includes a rotating section 211 and a quick-change section 212. The rotating section 211 is in threaded cooperation with the quick-pressing nut 24. At the same time, the quick-change section 212 is sleeved on the other end of the rotating section 211 in a threaded cooperation manner, and the thread rotation directions at both ends of the rotating section 211 are opposite, so that when the quick-pressing nut 24 is pressed to drive the rotation of the rotating section 211, the quick-change section 212 will not rotate, but will make the threaded cooperation relationship between the rotating section 211 and the quick-change section 212 more firm. Generally, before use, the rotating section 211 and the quick-change section 212 are firmly connected. Even if there is a relatively weak reverse rotation force, it will not affect the connection state between the two. The clamping protrusion 23 is arranged on the surface of the quick-change section 212. At the same time, the quick-change section 212 is installed at the second end 12 of the test seat 10 through a bearing, and the test seat 10 is provided with a moving channel 108 connecting the annular groove 104 to the second end 12 for the clamping protrusion 23 to move. Thus, when the profile accuracy of the clamping protrusion 23 decreases, a new quick-change section 212 with the clamping protrusion 23 can be flexibly replaced, which is convenient for maintenance and has a low cost.

[0042] In one embodiment, the SOP small-outline pin package test seat with a quick-fixing structure further includes a limit seat 30. The top of the limit seat 30 is provided with a U-shaped groove 301 for limiting the test seat 10. At the same time, the first end 11 is close to the opening of the U-shaped groove 301. Thus, when the quick-pressing nut 24 is pressed, the test seat 10 can be limited by the limit seat 30, and further, the movement of the test seat 10 can be avoided to achieve the quick fixing of the SOP pins by the pressing plate 22.

[0043] Further preferably, a semiconductor refrigeration sheet 13 is installed at the bottom of the placement groove 101. At the same time, the test seat 10 and the limit seat 30 are provided with a thermally conductive channel 302 that is vertically communicated at a position opposite to the semiconductor refrigeration sheet 13, and a cooling fan for dissipating the heat in the thermally conductive channel 302 is installed at the bottom of the limit seat 30. The semiconductor refrigeration sheet 13 can absorb the high temperature brought by the SOP pin test and release the absorbed high temperature into the thermally conductive channel 302, and finally dissipate it to the outside through the cooling fan, so as to provide a good temperature environment for the SOP pin package test. The thermally conductive channel 203 can buffer between the semiconductor refrigeration sheet 13 and the cooling fan to avoid the high temperature directly acting on the cooling fan. In addition, the thermally conductive channel 203 can also store a certain amount of high temperature, which can further improve the heat dissipation effect.

[0044] In one embodiment, a locking ramp structure 14 is provided between the annular groove 104 and the locking space 105 . The inclination angle of the locking slope structure 14 relative to the bottom of the annular groove 104 is smaller than the inclination angle of the locking slope structure 14 relative to the bottom of the locking space 105, so that the locking protrusion 23 can form self-locking when it moves to the locking space 105. That is to say, the locking protrusion 23 is more likely to pass through the annular groove 104 to cross the locking slope structure 14 and enter the locking space 105, but the locking protrusion 23 is not easy to cross the locking slope structure 14 from the locking space 105 and move into the annular groove 104. In the process of crossing the locking slope structure 14, it is compressed by the locking slope structure 14 and produces a slight deformation, and automatically elastically resets after entering the locking space 105, thereby forming self-locking and forcing the locking protrusion 23 to stay stably in the locking space, that is, the clamping plate 22 can firmly and stably clamp the SOP pin, unless an external force rotates the rotating shaft 20 in the opposite direction to unlock the locking force, that is, the end of the rotating shaft 20 close to the second end 12 is rotated in the opposite direction.

[0045] In one embodiment, the clamping plate 22 is located on the inner side of the clamping rod 21 and is connected to the clamping rod 21 through an adapter plate 26. At the same time, the plane where the bottom of the clamping plate 22 is located and the plane where the bottom of the clamping rod 21 is located have a predetermined angle, so that when the clamping plate 22 horizontally clamps the SOP pin in the pin slot 102, the clamping rod 21 is tilted upward. In this way, the clamping rod 21 can be prevented from touching the bottom of the pin slot 102 during the rotation process to affect the clamping effect of the clamping plate 22 on the SOP pin. On the other hand, the height difference brought by the adapter plate 26 can also reduce the torsional deformation of the torsion spring to a certain extent, and can also extend the service life of the torsion spring while ensuring that the clamping plate 22 clamps the SOP pin.

[0046] Since there are some vulnerable parts in this package test socket, and it is difficult to quickly detect when there are problems with the pressing quality, there is a problem of inaccurate package testing. Therefore, in one embodiment, the SOP small outline lead package test socket with a quick fixing structure further includes a spare fixing structure. The spare fixing structure includes one or more spare pressing rods 41 symmetrically arranged directly above the fan-shaped rotating grooves 103 on both sides of the test socket 10. That is, one spare pressing rod 41 can be symmetrically arranged on both sides of the test socket 10, or multiple spare pressing rods 41 can be symmetrically arranged, both of which can achieve the function of pressing down the pressing rod 21. The rotation and movement of any pressing rod 21 will drive the rotation of the rotating shaft 20, and ultimately the pressing plate 22 presses the SOP pins. Specifically, a locking block 42 is provided at the lower part of the spare pressing rod 41. The test socket 10 is provided with a spare channel 109 that communicates with the fan-shaped rotating groove 103 in the height direction, where the spare channel 109 cooperates with the spare pressing rod 41 and is directly opposite to the pressing rod 21 for pressing down the pressing rod 21 through the spare pressing rod 41. Combined with Figure 6 , a spare guiding groove 401 that cooperates with the locking block 42 is provided on the side wall of the spare channel 109. At the same time, a second locking space 402 perpendicular to the spare channel 109 is provided at a predetermined position in the lower part of the spare guiding groove 401, so that when the locking block 42 rotates and moves into the second locking space 402 through the spare guiding groove 401, the pressing plate 22 just presses on the surface of the SOP pins in the pin groove 102. That is, manually press down the spare pressing rod 41. When it cannot be pressed down anymore, directly rotate the spare pressing rod 41 to move the locking block 42 to the second locking space 402, and then firmly press the SOP pins through the pressing plate 22;

[0047] Correspondingly, a pressure sensor is installed on the bottom surface of the pressing plate 22 for generating an induction signal when pressing the SOP pins. At the same time, an alarm signal lamp 15 electrically connected to the pressure sensor is installed on the test socket 10. Thus, the pressing effect of the pressing plate 22 can be monitored through the cooperation of the pressure sensor and the alarm signal lamp 15. When the pressing plate 22 is not pressed down in place, the SOP pins can be pressed through the spare pressing rod 41, which can ensure the package testing quality and package testing efficiency. In this case, it is very likely that the self-locking fails due to the wear of the clamping protrusion 23. The profile accuracy of the clamping protrusion 23 can be checked to determine whether a new quick-change section 212 needs to be replaced.

[0048] Further preferably, a pressing cap 43 is provided at the top end of the spare pressing rod 41. The pressing cap 43 protrudes from the spare pressing rod 41 in the circumferential direction. At the same time, a spring 44 is sleeved on the spare pressing rod 41, and both ends of the spring 44 abut between the pressing cap 43 and the top of the test base 10. When the spare pressing rod 41 is not needed, the spare pressing rod 41 will not protrude into the sector-shaped rotating groove 103 to affect the operation of the pressing rod 21. At the same time, after the test is completed, when the locking block 42 is moved into the spare guiding groove 401, the spare pressing rod 41 can also quickly and automatically float upward under the rebounding action of the spring 44. A protective cover 16 is further provided on the top of the test base 10 to protect the spare fixing structure and also prevent accidental pressing on the spare pressing rod 41. When the spare fixing structure needs to be used, only the protective cover needs to be removed, and then the pressing cap 43 can be directly pressed.

[0049] Generally, the spare fixing structure is only used as a backup and has a low usage frequency.

[0050] It should be noted that the terms "first" and "second" in this application are only for descriptive purposes, do not represent any order, and cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0051] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and described in the embodiments. Without departing from the above principles, the embodiments of the present invention can have any deformation or modification.

Claims

1. An SOP small outline package test socket with a quick fixing structure, characterized in that, It includes a test socket and a quick-fixing structure. The test socket has opposite first and second ends along the length direction. A placement groove is provided at the top of the test socket, and a plurality of pin grooves are symmetrically arranged on both sides of the placement groove. The quick-fixing structures are symmetrically arranged on both sides of the test socket and include a rotating shaft. The rotating shaft extends along the length direction of the test socket and penetrates the test socket. A pressing member is vertically connected to the surface of the rotating shaft opposite to the pin groove. The test socket is provided with a sector-shaped rotating groove that cooperates with the pressing member. A convex is provided on the outer surface of the rotating shaft near the second end. An annular groove that cooperates with the convex is provided in the test socket. A locking space that cooperates with the convex is provided at one end of the annular groove. A torsion spring is fixedly sleeved on the surface of the rotating shaft between two adjacent pin grooves. The torsion spring has a free state and a rotating state. The test socket is provided with a torsion space for the torsion spring to twist. By rotating the rotating shaft, the torsion spring is switched back and forth between the free state and the rotating state. When the torsion spring is in the free state, the torsion spring urges the pressing member to be located within the test socket by restricting the rotating shaft, and the convex is located at one end of the annular groove away from the locking space. By rotating the rotating shaft in the positive direction, the torsion spring is gradually switched to the rotating state until the pressing member presses the SOP pins located in the pin grooves, and the convex moves along the annular groove and is self-locked in the locking space. By rotating the rotating shaft in the reverse direction, the convex overcomes the locking force of the locking space and disengages from the locking space. Under the action of the torsion spring, the rotating shaft automatically resets and the torsion spring is switched to the free state. The quick-fixing structure further includes a quick-pressing nut. The quick-pressing nut is sleeved on the rotating shaft at the first end in a threaded fit manner. The quick-pressing nut is partially located within the test socket, and guiding protrusions are symmetrically arranged on the outer surface of the part located within the test socket. A limiting groove that cooperates with the guiding protrusions is arranged along the length direction within the test socket, so that the quick-pressing nut can move in a fixed direction along the length direction. Based on the threaded fit relationship and the cooperation relationship between the convex and the annular groove, the rotating shaft can rotate in a fixed direction, where the two end positions of the limiting groove respectively cooperate with the two end positions of the annular groove and cooperate with the positions of the torsion spring in the free state and the rotating state. The rotating shaft includes a rotating section and a quick-changing section. The rotating section is in threaded fit with the quick-pressing nut. The quick-changing section is sleeved on the other end of the rotating section in a threaded fit manner, and the thread rotation directions at both ends of the rotating section are opposite. The convex is arranged on the surface of the quick-changing section. The quick-changing section is installed at the second end of the test socket through a bearing. The test socket is provided with a moving channel that communicates the annular groove to the second end for the convex to move.

2. The SOP small outline pin package test socket with a quick fixing structure according to claim 1, characterized in that, The quick compression nuts in the quick fixing structures on both sides are vertically connected with linkage rods, and a guide groove matching with the linkage rods is arranged in the test seat along the length direction.

3. The SOP small outline pin package test socket with a quick fixing structure as described in claim 1, characterized in that, It further includes a limit seat, and a U-shaped groove for limiting the test seat is arranged at the top of the limit seat, and the first end is close to the opening of the U-shaped groove.

4. The SOP small outline pin package test socket with a quick fixing structure as described in claim 3, characterized in that, A semiconductor refrigerating sheet is installed at the bottom of the placement groove, heat conduction channels communicating up and down are arranged at the positions of the test seat and the limit seat opposite to the semiconductor refrigerating sheet, and a cooling fan for dissipating the heat in the heat conduction channels is installed at the bottom of the limit seat.

5. The SOP small outline package test socket with a quick fixing structure according to claim 1, characterized in that, A locking slope structure is arranged between the annular groove and the locking space, and the inclination angle of the locking slope structure relative to the bottom of the annular groove is smaller than the inclination angle of the locking slope structure relative to the bottom of the locking space, so that the clamping convex can form self-locking when moving to the locking space.

6. The SOP small outline pin package test socket with a quick fixing structure according to claim 1, characterized in that The pressing member includes a pressing rod and a pressing plate. The pressing rod is vertically connected to the rotating shaft. The pressing plate is located inside the pressing rod and is connected to the pressing rod through an adapter plate. The plane where the bottom of the pressing plate is located and the plane where the bottom of the pressing rod is located have a predetermined included angle, so that when the pressing plate horizontally presses the SOP pins in the pin groove, the pressing rod inclines obliquely upward.

7. The SOP small outline pin package test socket with a quick fixing structure according to claim 6, characterized in that, It further includes a spare fixing structure. The spare fixing structure includes one or more spare pressing rods symmetrically arranged directly above the sector-shaped rotating grooves on both sides of the test seat. A locking block is arranged at the lower part of the spare pressing rod. The test seat is provided with a spare channel communicating with the sector-shaped rotating groove in the height direction. The spare pressing rod is matched with the spare channel for pressing down the pressing rod. A spare guide groove matched with the locking block is arranged on the side wall of the spare channel. A second locking space perpendicular to the spare channel is arranged at a predetermined position in the lower part of the spare guide groove, so that when the locking block rotates and moves into the second locking space through the spare guide groove, the pressing plate just presses on the surface of the SOP pins in the pin groove; A pressure sensor is installed on the bottom surface of the pressing plate, and an alarm signal lamp electrically connected to the pressure sensor is installed on the test seat.

8. The SOP small outline pin package test socket with a quick fixing structure according to claim 7, wherein, A pressing cap is arranged at the top end of the spare pressing rod. The pressing cap protrudes from the spare pressing rod in the circumferential direction. A spring is sleeved on the spare pressing rod. Both ends of the spring abut between the pressing cap and the top of the test seat. A protective cover is further arranged at the top of the test seat for protecting the spare fixing structure.

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