Automatic calibration device for original point of ejector pin of MIC test machine

Abstract

The utility model discloses an automatic calibration device for an original point of an ejector pin of an MIC test machine. The MIC test machine thimble original point automatic calibration device comprises a calibration shell, a detection circuit board and a pressure sensor, the calibration shell is provided with a containing space with an opening in one side, the containing space is used for containing an MIC test machine thimble, and a calibration face is formed on the side, opposite to the opening, of the calibration shell; the detection circuit board is fixed on the outer side of the calibration shell; and the pressure sensor is at least partially fixed on the calibration surface and is electrically connected with the detection circuit board. The automatic calibration device for the original point of the ejector pin of the MIC testing machine can realize automatic calibration of the original point position of the ejector pin, and compared with a manual confirmation calibration mode, the automatic calibration device for the original point of the ejector pin of the MIC testing machine can accurately calibrate the original point position of the ejector pin, can effectively avoid position deviation of materials sucked by the MIC testing machine, and improves the accuracy of calibration of the original point of the ejector pin of the MIC testing machine. Therefore, the phenomenon that the microphone sound hole or the MIC is buried and pressed to be broken is effectively avoided, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of semiconductor packaging testing, in particular to an automatic calibrating device for the origin of a pin of a MIC testing machine. Background Art

[0002] At present, the pin origin calibration of a microphone (MIC) tester is usually carried out by manual confirmation. This method has deviations and poor accuracy, and can easily cause the MIC tester to absorb material position deviations, resulting in the microphone sound hole or MIC buried resistor being broken, and poor product quality. Utility Model Content

[0003] The main purpose of the utility model is to provide an automatic calibration device for the ejector pin origin of a MIC tester, aiming to solve the technical problems of poor accuracy in the current manual confirmation of the ejector pin origin calibration, easy to cause the microphone sound hole or MIC buried resistance to break, and poor product quality.

[0004] To achieve the above-mentioned purpose, the automatic calibration device for the ejector pin origin of a MIC test machine proposed by the utility model comprises:

[0005] A calibration shell, wherein the calibration shell has a receiving space with an opening on one side for receiving a MIC test machine ejector pin, and a calibration surface is formed on a side of the calibration shell facing away from the opening;

[0006] a detection circuit board, the detection circuit board being fixed to the outside of the calibration shell; and

[0007] A pressure sensor is at least partially fixed on the calibration surface and electrically connected to the detection circuit board.

[0008] In some embodiments, the detection circuit board is provided with a first conductive connection portion, and the pressure sensor is provided with a second conductive connection portion at one end away from the calibration surface, and the second conductive connection portion abuts against and is electrically connected to the first conductive connection portion.

[0009] In some embodiments, the pressure sensor includes a first sensing segment and a second sensing segment that are bent and electrically conductive, the first sensing segment is at least partially fixed on the calibration surface, and the second conductive connection portion is disposed at an end of the second sensing segment away from the first sensing segment.

[0010] In some embodiments, the first sensing segment is in the shape of a plate, and the plate surface of the first sensing segment is adhered and fixed to the calibration surface; the first sensing segment includes a calibration portion and a connecting portion connected to each other, and one end of the connecting portion away from the calibration portion is connected to the second sensing segment, the outer contour of the calibration portion is an arc shape, and the outer contour of the connecting portion is a rectangular shape.

[0011] In some embodiments, the MIC tester pin origin automatic calibration device also includes a pressure plate, which is arranged on the side of the pressure sensor facing away from the calibration surface and fixedly connected to the calibration shell; the pressure plate is provided with a detection through hole passing through two opposite surfaces, and the detection through hole is connected to at least a portion of the surface of the pressure sensor.

[0012] In some embodiments, the MIC tester ejector pin origin automatic calibration device includes a protective cover, which is fixed to the outside of the calibration shell and forms a protective space with the calibration shell. The detection circuit board is located in the protective space.

[0013] In some embodiments, the protective cover includes a top plate, a first side plate and a second side plate, the top plate is fixed to the outside of the calibration shell, the first side plate is connected to the side wall of the top plate away from the calibration shell, the two adjacent side walls of the second side plate are respectively connected to the top plate and the first side plate, and the top plate, the first side plate, the second side plate and the calibration shell together enclose the protective space.

[0014] In some embodiments, the protective cover further includes a fixed ear plate, the fixed ear plate is bent and connected to a side of the top plate facing the calibration shell, and the fixed ear plate is fixed to an outer side of the calibration shell.

[0015] In some embodiments, the top plate, the first side plate and the second side plate are an integral structure.

[0016] In some embodiments, the protective cover is provided with a wire passing hole, and the wire passing hole is connected to the protective space.

[0017] The utility model provides an automatic calibration device for the origin of a MIC tester ejector pin, comprising a calibration shell, a detection circuit board and a pressure sensor. The calibration shell has an accommodating space with an opening on one side for accommodating the ejector pin of the MIC tester, and a calibration surface is formed on the side of the calibration shell facing away from the opening; the detection circuit board is fixed on the outer side of the calibration shell; the pressure sensor is at least partially fixed on the calibration surface and is electrically connected to the detection circuit board. With such a structural arrangement, when calibrating the ejector pin origin of a MIC test machine, the calibration shell in the automatic calibration device is placed on the ejector pin cap on which the ejector pin is installed, so that the length direction of the ejector pin is perpendicular to the calibration surface, and the product to be tested is placed on the surface of the pressure sensor facing away from the calibration surface. At the same time, the detection circuit board is electrically connected to a driving member that drives the material pickup nozzle and the ejector pin to move. First, the material pickup nozzle of the MIC test machine is calibrated, and the detection circuit board controls the material pickup nozzle to move toward the calibration surface. When the material pickup nozzle moves to contact the product to be tested, it continues to move and squeeze the product to be tested. At this time, the pressure sensor detects a first pressure signal and transmits the first pressure signal to the detection circuit board. A first preset pressure threshold is pre-stored in the detection circuit board. When the pressure value corresponding to the first pressure signal received by the detection circuit board is greater than the maximum pressure value of the first preset pressure threshold, the material pickup nozzle stops moving. Thereafter, the detection circuit board controls the material pickup nozzle to move in a direction away from the product to be tested. When the pressure value corresponding to the second pressure signal detected by the pressure sensor is less than the first preset pressure threshold When the minimum pressure value is reached, the detection circuit board controls the material picking suction nozzle to stop moving. At this time, the suction nozzle position is the position just in contact with the product, and the material picking suction nozzle position calibration is completed. Then, the ejector origin calibration is performed. The detection circuit board controls the ejector to move toward the calibration surface along its length direction. When the ejector penetrates the ejector cap and moves to contact the inner wall of the calibration shell opposite to the calibration surface, it continues to move toward the calibration surface and squeezes the inner wall of the calibration shell. At this time, the pressure sensor detects a third pressure signal and transmits the third pressure signal to the detection circuit board. The detection circuit board pre-stores a second preset pressure threshold. When the pressure value corresponding to the third pressure signal received by the detection circuit board is greater than the maximum pressure value of the second preset pressure threshold, the detection circuit board controls the ejector to stop moving. Thereafter, the detection circuit board controls the ejector to move in a direction away from the calibration surface. When the pressure value corresponding to the fourth pressure signal detected by the pressure sensor is less than the minimum pressure value of the second preset pressure threshold, the ejector stops moving. At this time, the position of the ejector is the ejector origin position. At this point, the ejector origin calibration is completed. The automatic calibrating device for the ejector pin origin of a MIC tester of the present invention can realize automatic calibration of the ejector pin origin position. Compared with the manual confirmation calibration method, the automatic calibrating device for the ejector pin origin of a MIC tester of the present invention can calibrate the ejector pin origin position more accurately, and can effectively avoid the position deviation of the material absorbed by the MIC tester, thereby effectively avoiding the phenomenon of microphone sound hole or MIC buried resistance being broken, which is beneficial to improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of an automatic calibrating device for the ejector pin origin of a MIC test machine of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the automatic calibrating device for the ejector pin origin of a MIC test machine of the utility model during use;

[0021] Figure 3 It is a schematic diagram of the structural decomposition of the automatic calibrating device for the ejector pin origin of the MIC test machine of the utility model during use;

[0022] Figure 4 It is a schematic diagram of the structural cross section of the automatic calibrating device for the ejector pin origin of a MIC test machine of the utility model during use;

[0023] Figure 5 It is a structural schematic diagram of another perspective of the pressure sensor in the automatic calibrating device for the ejector pin origin of a MIC test machine of the present utility model.

[0024] Description of Figure Numbers:

[0025] name Label name Label Automatic calibration device 100 Protective cover 50 Calibration shell 10 roof 51 Accommodation space 11 Make way for through holes 511 Calibration surface 12 Cable hole 512 Matching hole 13 First side panel 52 Detection circuit board 20 Second side panel 53 Fixed column 21 Fixed ear plate 54 Pressure Sensors 30 Second fixing hole 541 First sensing segment 31 Second fastener 542 Calibration Department 311 Products to be tested 200 Calibration boss 311a Thimble cap 300 Connection 312 Positioning slot 301 Second sensing segment 32 Mounting holes 302 Pressure plate 40 Annular groove 303 Detection of through holes 41 thimble 400 First fixing hole 42 Reclaiming nozzle 500 First fastener 43

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] In order to solve the technical problems of poor accuracy in the current manual confirmation of ejector pin origin calibration, easy breaking of microphone sound holes or MIC buried resistors, and poor product quality, the utility model provides an automatic ejector pin origin calibration device 100 for a MIC test machine.

[0032] like Figures 1 to 5 As shown, the MIC tester is first introduced. The MIC tester includes an ejector pin 400, an ejector cap 300 and a material suction nozzle 500. The ejector cap 300 is roughly cylindrical in structure, with one end open and a receiving space (not marked) formed inside. The receiving space is roughly cylindrical, and the other end is provided with an avoidance through hole (not marked) connected to the receiving space for the ejector pin 400 to pass through. A positioning groove 301 is provided at the bottom of the ejector cap 300 for positioning the assembly of the ejector cap 300. A mounting hole 302 connected to the receiving space is also provided near the bottom of the ejector cap 300. The mounting hole 302 is used to cooperate with a fastener to install and fix the ejector cap 300. The inner wall of the ejector cap 300 is provided with an annular groove 303 near the bottom, and the annular groove 303 is used to install a guide block (not shown). The guide block is provided with a through hole penetrating two opposite surfaces, and the through hole and the avoidance hole are arranged correspondingly. After assembly, the ejector 400 is sequentially inserted into the through hole and the avoidance hole. The guide block plays a guiding role in the assembly of the ejector 400, and avoids the movement of the ejector 400 from being offset and misaligned, thereby affecting the calibration accuracy. The specific structure of the MIC tester is not limited, and all are within the protection scope of the present utility model.

[0033] Please refer to Figures 1 to 4 In an embodiment of the utility model, a MIC tester ejector pin origin automatic calibration device 100 comprises a calibration shell 10, a detection circuit board 20 and a pressure sensor 30. The calibration shell 10 has a receiving space 11 with an opening on one side for receiving a MIC tester ejector pin 400. A calibration surface 12 is formed on the side of the calibration shell 10 facing away from the opening. The detection circuit board 20 is fixed to the outer side of the calibration shell 10. The pressure sensor 30 is at least partially fixed on the calibration surface 12 and is electrically connected to the detection circuit board 20.

[0034] Specifically, the calibration shell 10 is placed horizontally as an example for explanation. The calibration shell 10 is roughly cylindrical, with one end (i.e., the lower end) open, and a receiving space 11 is formed inside. The receiving space 11 is roughly cylindrical, and the receiving space 11 is used to place the ejector cap 300 with the ejector 400 installed. The other end surface (i.e., the upper end surface) of the calibration shell 10 forms a calibration surface 12. Of course, in some other embodiments, the shape of the calibration shell 10 can also be a cube or other reasonable shapes, which are not limited here. The material of the calibration shell 10 can be selected as a metal material, which has good structural strength and can help ensure the stability and reliability of the calibration process. The detection circuit board 20 is a PCB board, which has the functions of storage, data processing and control, that is, the detection circuit board 20 can store the first preset pressure threshold corresponding to the material pickup nozzle 500 and the second preset pressure threshold corresponding to the ejector pin 400. The first preset pressure threshold and the second pressure threshold are set by the user according to actual conditions. The detection circuit board 20 can convert the pressure signal detected by the pressure sensor 30 into a corresponding pressure value, and compare the pressure value with the corresponding preset pressure threshold. When in use, the detection circuit board 20 is electrically connected to a driving member (optionally a cylinder or a motor) that drives the material pickup nozzle 500 and the ejector pin 400 to move. The detection circuit board 20 can control the operation or stop of the driving member, thereby controlling the movement process of the material pickup nozzle 500 and the ejector pin 400. The detection circuit board 20 is fixed on the outside of the calibration shell 10. The detection circuit board 20 can be fixed on the outside of the calibration shell 10 near the bottom by a fixing column 21, that is, the detection circuit board 20 is provided with a first assembly hole, and the calibration shell 10 is correspondingly provided with a second assembly hole. The fixing column 21 is inserted into the first assembly hole and the second assembly hole to fix the detection circuit board 20 on the calibration shell 10. Such a setting is relatively simple to operate and relatively firm. At least part of the pressure sensor 30 is fixed on the calibration surface 12 for detecting the pressure signal. The fixing method can be selected by gluing, clamping or screw fixing. When calibrating the material suction nozzle 500, the side of the pressure sensor 30 facing away from the calibration surface 12 is used to detect the pressure signal of the material suction nozzle 500 squeezing the product 200 to be tested. When calibrating the ejector pin 400, the side of the pressure sensor 30 facing the calibration surface 12 is used to detect the pressure signal of the ejector pin 400 squeezing the inner wall of the calibration shell 10. It should be noted that when calibrating the material suction nozzle 500 and the calibration ejector pin 400, the product 200 to be tested can be placed on the pressure sensor 30 with its back facing the calibration surface 12. Of course, the product 200 to be tested can also be placed without being limited here. The shape of the pressure sensor 30 is not limited. One end of the pressure sensor 30 away from the calibration surface 12 is electrically connected to the detection circuit board 20. The electrical connection method can be achieved by connecting with a wire, or the two can be in contact and electrically conductive, all of which are within the protection scope of the present utility model.

[0035] When calibrating the ejector pin origin of the MIC tester, the calibration shell 10 in the automatic calibration device 100 is placed on the ejector cap 300 on which the ejector pin 400 is installed, that is, the ejector cap 300 is located in the accommodating cavity of the calibration shell 10, so that the length direction of the ejector pin 400 is perpendicular to the calibration surface 12, and the product 200 to be tested is placed on the surface (i.e., the upper surface) of the pressure sensor 30 facing away from the calibration surface 12. First, the material suction nozzle 500 of the MIC tester is calibrated, and the detection circuit board 20 controls the material suction nozzle 500 to move toward the calibration surface 12 (i.e., downward). When the material suction nozzle 500 moves to contact the product 200 to be tested, it continues to move and squeeze the product to be tested. 200, at this time, the pressure sensor 30 detects a first pressure signal and transmits the first pressure signal to the detection circuit board 20. A first preset pressure threshold is pre-stored in the detection circuit board 20. When the pressure value corresponding to the first pressure signal received by the detection circuit board 20 is greater than the maximum pressure value of the first preset pressure threshold, the detection circuit board 20 controls the material picking suction nozzle 500 to stop moving; then the detection circuit board 20 controls the material picking suction nozzle 500 to move away from the product to be tested 200 (i.e. upward). When the pressure value corresponding to the second pressure signal detected by the pressure sensor 30 is less than the minimum pressure value of the first preset pressure threshold, the detection circuit board 20 controls the material picking suction nozzle 500 to stop moving. The material suction nozzle 500 stops moving. At this time, the position of the material suction nozzle 500 is the position just in contact with the product to be tested 200, that is, the position where the pressure of the material suction nozzle 500 on the product to be tested 200 tends to zero. The position calibration of the material suction nozzle 500 is completed, and then the ejector origin calibration is performed. The detection circuit board 20 controls the ejector 400 to move toward the calibration surface 12 (i.e. upward) along its length direction. When the ejector 400 passes through the avoidance through hole on the top of the ejector cap 300 and moves to the inner wall of the calibration shell 10 opposite to the calibration surface 12, it continues to move toward the calibration surface 12 and squeezes the inner wall of the calibration shell 10. At this time, the pressure sensor 30 detects a third pressure signal and The third pressure signal is transmitted to the detection circuit board 20, and the second preset pressure threshold is pre-stored in the detection circuit board 20. When the pressure value corresponding to the third pressure signal received by the detection circuit board 20 is greater than the maximum pressure value of the second preset pressure threshold, the detection circuit board 20 controls the ejector pin 400 to stop moving; then the detection circuit board 20 controls the ejector pin 400 to move in a direction away from the calibration surface 12 (i.e., downward). When the pressure value corresponding to the fourth pressure signal detected by the pressure sensor 30 is less than the minimum pressure value of the second preset pressure threshold, the ejector pin 400 stops moving. At this time, the position of the ejector pin 400 is the ejector pin origin position, and the ejector pin origin calibration is now completed.

[0036] It should be noted that when calibrating the material taking suction nozzle 500 , it is not necessary to place the product 200 to be tested, and the calibration can be performed by directly pressing the material taking suction nozzle 500 against the calibration surface 12 .

[0037] Optionally, the movement of the material picking nozzle 500 and the movement of the ejector pin 400 can be achieved by motor drive, and the specific structural setting is not limited. During calibration, the motor is electrically connected to the detection circuit board 20, and the detection circuit board 20 can control the operation or stop of the motor, thereby controlling the start movement, movement direction, movement speed and stop movement of the material picking nozzle 500 and the ejector pin 400.

[0038] The MIC tester ejector pin origin automatic calibration device 100 of the present invention can realize automatic calibration of the ejector pin origin position. Compared with the manual confirmation calibration method, the MIC tester ejector pin origin automatic calibration device 100 of the present invention can calibrate the ejector pin origin position more accurately, which can effectively avoid the position deviation of the material absorbed by the MIC tester, thereby effectively avoiding the phenomenon of microphone sound hole or MIC buried resistance being broken, which is beneficial to improving product quality.

[0039] In an optional embodiment of the utility model, the detection circuit board 20 is provided with a first conductive connection part 312, and the end of the pressure sensor 30 away from the calibration surface 12 is provided with a second conductive connection part 312, and the second conductive connection part 312 abuts against the first conductive connection part 312 and is electrically conductive.

[0040] In this embodiment, the first conductive connection portion 312 and the second conductive connection can be selected as a wiring structure or a plug and socket structure, as long as the first conductive connection portion 312 and the second conductive connection are electrically conductive when they are abutted. This embodiment adopts contact electrical conduction, eliminating the connection wire, and the assembly is relatively simple and the connection is effective, while also enhancing the connection stability of the structure.

[0041] like Figures 1 to 5 As shown, in an optional embodiment of the utility model, the pressure sensor 30 includes a first sensing segment 31 and a second sensing segment 32 that are bent and electrically conductive, the first sensing segment 31 is at least partially fixed on the calibration surface 12, and the second conductive connection portion 312 is arranged at an end of the second sensing segment 32 away from the first sensing segment 31.

[0042] Specifically, the first sensing section 31 and the second sensing section 32 are both flat plates, and the plate surfaces are arranged perpendicularly to each other, roughly forming an L-shaped structure. The end of the first sensing section 31 away from the second sensing section 32 is fixed on the calibration surface 12, and the end of the second sensing section 32 away from the first sensing section 31 is provided with a second conductive connection portion 312, and the second conductive connection portion 312 abuts against and is electrically connected to the first conductive connection portion 312 on the detection circuit board 20. Such a structural design can ensure that the structural setting is relatively compact, and the automatic calibration device 100 occupies less space.

[0043] like Figure 5As shown, the first sensing segment 31 is plate-shaped, and the plate surface of the first sensing segment 31 is fixed to the calibration surface 12; the first sensing segment 31 includes a calibration portion 311 and a connecting portion 312 connected to each other, and one end of the connecting portion 312 away from the calibration portion 311 is connected to the second sensing segment 32, the outer contour of the calibration portion 311 is arc-shaped, and the outer contour of the connecting portion 312 is rectangular.

[0044] Specifically, the first sensing section 31 and the second sensing section 32 are both in the shape of a plate, and the plate surface of the first sensing section 31 is fitted and fixed to the calibration surface 12. In this way, the setting is relatively stable, which is conducive to ensuring the stability of the calibration process. The second sensing section 32 and the connecting portion 312 are both rectangular plates, and the calibration portion 311 is in the shape of an arc plate. During calibration, the product 200 to be tested is placed on the surface of the calibration portion 311 facing away from the calibration surface 12 to detect the pressure signal. Optionally, the calibration portion 311 is placed in the middle position of the calibration surface 12 so that the calibration portion 311 can more effectively and accurately detect the pressure signal when the ejector pin 400 squeezes the inner wall of the calibration shell 10.

[0045] It should be noted that the first sensing segment 31 and the second sensing segment 32 of the pressure sensor 30 are an integrated structure and are electrically conductive.

[0046] like Figures 1 to 4 As shown, in an optional embodiment of the utility model, the MIC test machine pin origin automatic calibration device 100 also includes a pressure plate 40, which is arranged on the side of the pressure sensor 30 facing away from the calibration surface 12 and is fixedly connected to the calibration shell 10; the pressure plate 40 is provided with a detection through hole 41 passing through two opposite surfaces, and the detection through hole 41 is connected to at least a portion of the surface of the pressure sensor 30.

[0047] In this embodiment, a pressure plate 40 is used to fix the pressure sensor 30, which is relatively simple to operate and relatively firmly fixed. Specifically, the pressure sensor 30 is an L-shaped plate, and the pressure plate 40 is a circular plate, whose size is adapted to the size of the calibration surface 12. The pressure plate 40 is fixed to the calibration surface 12 by a first fastener 43, that is, the pressure plate 40 is provided with a plurality of first fixing holes 42 spaced along the circumferential direction near the edge, and the calibration surface 12 is provided with a plurality of matching holes 13 correspondingly, and the first fastener 43 is provided in plurality, and each first fastener 43 is correspondingly inserted and fixed in the first fixing hole 42 and the matching hole 13 to fix the pressure plate 40 on the calibration surface 12. The first fastener 43 can be a screw. The detection through hole 41 is located in the middle of the pressure plate 40 and passes through two opposite surfaces of the pressure plate 40. The detection through hole 41 can be a circular hole, and its size is larger than the size of the product 200 to be tested. The detection through hole 41 is connected to the surface of the calibration part 311 of the pressure sensor 30. During calibration, the product 200 to be tested is placed in the detection through hole 41 and is located on the surface of the calibration part 311. The provision of the detection through hole 41 can also prevent the product 200 to be tested from moving during the calibration process and affecting the calibration accuracy.

[0048] Optionally, the calibration portion 311 is provided with a calibration boss 311a protruding toward the detection through hole 41. The calibration boss 311a is truncated, and its circumferential dimension matches the circumferential dimension of the detection through hole 41. Its thickness is smaller than the depth of the detection through hole 41, that is, the calibration boss 311a is located in the detection through hole 41. After the product 200 to be tested is placed, the product 200 to be tested is located on the calibration boss 311a in the detection through hole 41. The setting of the calibration boss 311a can more effectively detect the pressure signal when the material suction nozzle 500 squeezes the product 200 to be tested, which is conducive to improving the accuracy of the automatic calibration device 100.

[0049] like Figures 1 to 4 As shown, in an optional embodiment of the utility model, the MIC tester pin origin automatic calibration device 100 includes a protective cover 50, which is fixed to the outside of the calibration shell 10 and forms a protective space with the calibration shell 10, and the detection circuit board 20 is located in the protective space. In this embodiment, the setting of the protective cover 50 plays a role in protecting the detection circuit board 20 to ensure the stability and reliability of the calibration process. The specific structure and material setting of the protective cover 50 are not limited, as long as it can form a protective space for protecting the detection circuit board 20 with the calibration shell 10.

[0050] In a specific embodiment of the utility model, the protective cover 50 includes a top plate 51, a first side plate 52 and a second side plate 53. The top plate 51 is fixed to the outside of the calibration shell 10, the first side plate 52 is connected to the side wall of the top plate 51 away from the calibration shell 10, and the two adjacent side walls of the second side plate 53 are respectively connected to the top plate 51 and the first side plate 52. The top plate 51, the first side plate 52, the second side plate 53 and the calibration shell 10 together enclose a protective space.

[0051] Specifically, the top plate 51, the first side plate 52 and the second side plate 53 are all flat plates. The top plate 51 is horizontally arranged above the detection circuit board 20, one side wall of which is fixed to the outside of the calibration shell 10, and the other side wall is connected to the first side plate 52. The plate surface of the first side plate 52 is perpendicular to the plate surface of the top plate 51. The two adjacent side walls of the second side plate 53 are connected to the top plate 51 and the first side plate 52. The plate surfaces of the second side plate 53, the first side plate 52 and the top plate 51 are mutually perpendicular. In this way, the top plate 51, the first side plate 52, the second side plate 53 and the calibration shell 10 are enclosed together to form a protective space for protecting the detection circuit board 20. It should be noted that the size of the top plate 51, the first side plate 52 and the second side plate 53 is determined according to the size of the detection circuit board 20, as long as the detection circuit board 20 can be protected.

[0052] Furthermore, in a specific embodiment of the present invention, the protective cover 50 further includes a fixed ear plate 54 , which is bent and connected to a side of the top plate 51 facing the calibration shell 10 , and the fixed ear plate 54 is fixed to the outer side of the calibration shell 10 .

[0053] Specifically, the plate surface of the fixed ear plate 54 is perpendicular to the plate surface of the top plate 51, and the fixed ear plate 54 is fixed to the outside of the calibration shell 10 through the second fastener 542, that is, the fixed ear plate 54 is provided with a second fixing hole 541, and the calibration shell 10 is provided with a corresponding hole, and the second fastener 542 is inserted and fixed in the second fixing hole 541 and the corresponding hole to fix the fixed ear plate 54 to the outside of the calibration shell 10. The second fastener 542 can be a screw.

[0054] It should be noted that, since the fixed ear plate 54 is a plate-like structure, in order to ensure its better fixing firmness, an assembly portion (not marked) is formed on the outer side of the calibration shell 10. The assembly portion is planar and passes through the upper and lower ends of the calibration shell 10. The surface of the assembly portion is parallel to the plate surface of the fixed ear plate 54. In this way, the fixed ear plate 54 can be fitted and fixed to the assembly portion, the contact area is relatively large, and the fixation is relatively firm.

[0055] In an optional embodiment of the utility model, the top plate 51, the first side plate 52 and the second side plate 53 are an integrated structure. Optionally, the top plate 51, the first side plate 52, the second side plate 53 and the fixed ear plate 54 are an integrated structure. In this way, the structural connection of the protective cover 50 is relatively firm, and the protective effect on the detection circuit board 20 is better.

[0056] In an embodiment in which the pressure sensor 30 includes a first sensing segment 31 and a second sensing segment 32 that are bent and connected, a top plate 51 is provided with a clearance hole 511 for the first sensing segment 31 to pass through. After assembly, the first sensing segment 31 passes through the clearance hole 511, and a first conductive connecting portion 312 provided at the lower end of the first sensing segment 31 abuts against and is electrically connected to the second conductive connecting portion 312 on the detection circuit board 20. With such a setting, the structure is relatively compact, and the setting stability of the pressure sensor 30 can be further enhanced, which is beneficial to improving the calibration accuracy.

[0057] Furthermore, the protective cover 50 is also provided with a wire hole 512, and the wire hole 512 is connected to the protective space. Optionally, the wire hole 512 is provided on the top plate 51, and the wire hole 512 is used for passing the connecting wire on the detection circuit board 20, and the connecting wire can be a connecting wire connected to the driving member, or a connecting wire connected to the power supply.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An automatic calibrating device for the origin of a MIC tester pin, characterized in that: The MIC test machine ejector pin origin automatic calibration device comprises: A calibration shell, wherein the calibration shell has a receiving space with an opening on one side for receiving a MIC test machine ejector pin, and a calibration surface is formed on a side of the calibration shell facing away from the opening; a detection circuit board, the detection circuit board being fixed to the outside of the calibration shell; and A pressure sensor is at least partially fixed on the calibration surface and electrically connected to the detection circuit board.

2. The automatic calibrating device for the ejector pin origin of a MIC test machine according to claim 1, characterized in that: The detection circuit board is provided with a first conductive connection portion, and the pressure sensor is provided with a second conductive connection portion at one end away from the calibration surface, and the second conductive connection portion abuts against and is electrically connected to the first conductive connection portion.

3. The automatic calibrating device for the ejector pin origin of a MIC test machine according to claim 2, characterized in that: The pressure sensor comprises a first sensing segment and a second sensing segment which are connected in a folded manner and are electrically conductive. The first sensing segment is at least partially fixed on the calibration surface. The second conductive connection portion is disposed at an end of the second sensing segment away from the first sensing segment.

4. The automatic calibrating device for the ejector pin origin of a MIC test machine as claimed in claim 3, characterized in that: The first sensing section is in a plate shape, and the plate surface of the first sensing section is adhered and fixed to the calibration surface; The first sensing section includes a calibration section and a connecting section connected to each other. One end of the connecting section away from the calibration section is connected to the second sensing section. The outer contour of the calibration section is an arc shape, and the outer contour of the connecting section is a rectangular shape.

5. The automatic calibrating device for the ejector pin origin of a MIC test machine according to any one of claims 1 to 4, characterized in that: The MIC test machine ejector pin origin automatic calibration device further comprises a pressing plate, which is arranged on a side of the pressure sensor facing away from the calibration surface and is fixedly connected to the calibration shell; The pressure plate is provided with a detection through hole penetrating two opposite surfaces, and the detection through hole is connected to at least a part of the surface of the pressure sensor.

6. The automatic calibrating device for the origin of the ejector pin of a MIC test machine according to any one of claims 1 to 4, characterized in that: The MIC tester ejector pin origin automatic calibration device comprises a protective cover, which is fixed to the outside of the calibration shell and forms a protective space with the calibration shell. The detection circuit board is located in the protective space.

7. The automatic calibrating device for the ejector pin origin of a MIC test machine according to claim 6, characterized in that: The protective cover includes a top plate, a first side plate and a second side plate, the top plate is fixed to the outside of the calibration shell, the first side plate is connected to the side wall of the top plate away from the calibration shell, the two adjacent side walls of the second side plate are respectively connected to the top plate and the first side plate, and the top plate, the first side plate, the second side plate and the calibration shell together enclose the protective space.

8. The automatic calibrating device for the ejector pin origin of a MIC test machine according to claim 7, characterized in that: The protective cover also includes a fixed ear plate, which is bent and connected to a side of the top plate facing the calibration shell, and the fixed ear plate is fixed to the outer side of the calibration shell.

9. The automatic calibrating device for the ejector pin origin of a MIC test machine according to claim 7, characterized in that: The top plate, the first side plate and the second side plate are an integrated structure.

10. The automatic calibrating device for the ejector pin origin of a MIC test machine according to claim 6, characterized in that: The protective cover is provided with a wire passing hole, and the wire passing hole is connected to the protective space.

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