Electronic component pin firmness detection device and detection method

Abstract

The invention provides an electronic component pin firmness detection device and detection method, and belongs to the technical field of firmness detection, the electronic component pin firmness detection device comprises a detection main body, a liquid nitrogen cylinder, a cold conduction rod group and a water dipping auxiliary rod; an accommodating cavity is formed in the detection main body; the liquid nitrogen cylinder is arranged at the upper part of the accommodating cavity and fixedly connected with the inner wall of the detection main body; the cold guide rod set is arranged in the containing cavity in the vertical direction. The upper end of the cold conduction rod group extends upwards into the liquid nitrogen cylinder, and the lower end extends downwards out of the detection main body; the water dipping auxiliary rod is fixed on the peripheral wall of the detection main body, and one end of the water dipping auxiliary rod extends downwards to be flush with the extension end of the cold conduction rod group; wherein the water dipping auxiliary rod is used for dripping a refrigerating fluid on a pin plating layer; and the cold conduction rod group is used for transmitting the cold quantity of the liquid nitrogen in the liquid nitrogen cylinder to the pin plating layer, so that the lower end of the cold conduction rod group and the pin plating layer are frozen through the refrigerating fluid. The electronic component pin firmness detection device and detection method provided by the invention can adapt to a small-area pin structure and a narrow space, and are good in operation convenience.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of firmness detection, and more particularly to an electronic component pin firmness detection device and method. BACKGROUND

[0002] In the field of semiconductor devices such as optical communication devices, wireless power devices, and microwave devices, ceramic tubes are often used as device packaging shells. To meet the functions of various devices, internal chips need to be interconnected with external user circuits through pins, and the reliability of the pins is crucial. The firmness of the pin surface coating is one of the important indicators of pin reliability.

[0003] In the prior art, to detect the reliability of the pins, a 3M adhesive tape can be used to paste and tear to judge, but this method is suitable for scenarios where the detected area has a certain area and the measured area is a flat structure. However, the sizes of various pins on complex structures are different, and most of the pins have small actual areas, so the adhesive tape pasting and tearing method cannot be used. SUMMARY

[0004] The purpose of the present application is to provide an electronic component pin firmness detection device and method, which aims to solve the technical problem of firmness detection of small footprint pin structures and pin structures in narrow spaces.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is: In a first aspect, an electronic component pin firmness detection device is provided, comprising: a detection main body, having an accommodation cavity inside; a liquid nitrogen cylinder arranged at the upper part of the accommodation cavity and fixedly connected with the inner wall of the detection main body; a cold guide rod group arranged in the accommodation cavity in a vertical direction, with the upper end of the cold guide rod group extending upward into the liquid nitrogen cylinder and the lower end extending downward out of the detection main body; and a water-dipping auxiliary rod fixed on the outer peripheral wall of the detection main body and extending downward to the same level as the extended end of the cold guide rod group at one end; wherein the water-dipping auxiliary rod is used to drip the frozen liquid onto the pin coating, and the cold guide rod group is used to transfer the coldness of the liquid nitrogen in the liquid nitrogen cylinder to the pin coating, so that the lower end of the cold guide rod group and the pin coating are frozen by the frozen liquid.

[0006] Compared with the prior art, the wet auxiliary rod can cover the pin plating layer with frozen liquid; the liquid nitrogen cylinder is filled with liquid nitrogen to provide frozen cold, and the cold is transmitted to the pin to be detected and the frozen liquid through the cold lead rod group, so that the frozen liquid fixes the extension end of the cold lead rod group and the pin plating layer, thereby facilitating the formation of a pulling force between the pin plating layer and the cold lead rod group when the detection main body is pulled, determining the firmness of the pin plating layer according to the loosening of the pin plating layer, and judging the reliability of the pin to be detected. The wet end of the wet auxiliary rod and the cold end of the cold lead rod group have small cross-sectional areas. Compared with the large-size structure of the adhesive tape bonding area, the wet auxiliary rod in the application can control the amount of frozen liquid dropped on the pin plating layer, and the cold end of the cold lead rod group can adjust the contact area between the cold lead rod group and the pin plating layer by reasonably configuring the cross-sectional area of the end face, thereby adapting to small-area and small-size pin structures and the detection of the firmness of the pin plating layer in a narrow space, and having a wide range of applications. In addition, in the application, the cold lead rod group and the pin plating layer are frozen by the cold of liquid nitrogen, which can resist the freezing effect of the frozen liquid by the pulling force, and thus the firmness of the pin plating layer can be obtained. The measurement process is simple, easy to operate, and convenient.

[0007] In combination with the first aspect, in a possible implementation manner, the cold lead rod group comprises: The first cold lead rod is fixed in the liquid nitrogen cylinder and penetrates into the containing cavity at one end; The second cold lead rod is coaxially arranged below the first cold lead rod; the second cold lead rod is slidingly connected in the containing cavity in a vertical direction; the second cold lead rod has a first state of sliding to the upper end and abutting against the first cold lead rod, and has a second state of sliding to the upper end and disconnecting from the first cold lead rod; When the second cold lead rod is in the first state, the liquid nitrogen in the liquid nitrogen cylinder is used to transmit cold to the second cold lead rod through the first cold lead rod, and the second cold lead rod is used to abut against the pin plating layer, so that the second cold lead rod freezes the lower end of the second cold lead rod and the pin plating layer through the frozen liquid.

[0008] The fixed first cold lead rod is provided to realize the output of the cold of liquid nitrogen, and the second cold lead rod is provided to realize the transmission of the cold from the first cold lead rod to the pin plating layer. Through the telescopic action of the second cold lead rod, the second cold lead rod can realize the first state of transmitting the cold with the first cold lead rod in the working state, and the second state of disconnecting from the first cold lead rod in the non-working state, so as to cut off the transmission of the cold.

[0009] In some embodiments, the electronic component pin firmness detection device further comprises: An adjusting rod set is arranged in the accommodating cavity, one end of the adjusting rod set is connected with the second cold conducting rod, and the other end of the adjusting rod set penetrates through the peripheral wall of the detection main body; A locking assembly is arranged between the detection main body and the extending end of the adjusting rod set; The adjusting rod set is used to slide up and down with the second cold conducting rod in the accommodating cavity, and the locking assembly is used to limit the position of the adjusting rod set when the second cold conducting rod slides to the first state or the second state.

[0010] The adjusting rod set is arranged to facilitate the up and down movement of the second cold conducting rod, thereby realizing the freedom of the up and down extension of the second cold conducting rod. The locking assembly is arranged to limit the position of the adjusting rod set after the second cold conducting rod is moved to the position, so as to avoid affecting the measurement accuracy due to the movement of the cold conducting rod set.

[0011] Illustratively, the adjusting rod set comprises: A connecting plate is fixed on the second cold conducting rod; An inner connecting rod is fixed at one end of the connecting plate; the other end of the inner connecting rod extends upward and penetrates through the peripheral wall of the detection main body horizontally, and is connected with the locking assembly; and A first elastic member is sleeved on the second cold conducting rod; one end of the first elastic member is fixed with the connecting plate, and the other end of the first elastic member extends downward and is fixed at the bottom of the accommodating cavity; When the extending end of the inner connecting rod is pushed up and down, the inner connecting rod drives the second cold conducting rod to slide up and down through the connecting plate; and the first elastic member is used to reset the second cold conducting rod from the second state to the first state.

[0012] The connecting plate is arranged to connect the second cold conducting rod with the inner connecting rod, so as to drive the second cold conducting rod to move up and down when the inner connecting rod is moved up and down; and the first elastic member is arranged to make the second cold conducting rod retract and switch from the second state to the first state, thereby realizing the reset of the second cold conducting rod.

[0013] In some embodiments, a sliding groove extending in the vertical direction is arranged on the detection main body; two first installation grooves are symmetrically arranged on the two side groove walls of the sliding groove; and the first installation grooves are arranged close to the lower end of the sliding groove; The locking assembly comprises: A button is slidingly arranged in the sliding groove and is connected with the extending end of the adjusting rod set; Two groups of push rods are arranged in one-to-one correspondence with the two groups of first installation grooves; one end of each push rod is connected in the corresponding first installation groove, and the other end of each push rod has the freedom of extension and retraction along the axial direction thereof; The two groups of push rods have a clamping state of clamping the button on both sides and a giving space state of moving away from the button.

[0014] The first installation groove is arranged at the lower end of the sliding groove, so that the push rod can clamp the outer peripheral wall of the button to achieve the clamping state and lock the button when the second cold guide rod is extended. Since the button is connected with the extension end of the adjusting rod group, the adjusting rod group can be locked by locking the button, thereby avoiding the movement of the second cold guide rod. When the second cold guide rod is finished, the push rod is in the giving space state to release the button, and the adjusting rod group drives the second cold guide rod to reset to the first state under the action of the first elastic member.

[0015] The two side walls of the sliding groove on both sides of the button are inclined surfaces. The button is slidingly connected to the extension end of the adjusting rod group in the direction of approaching or moving away from the groove bottom of the sliding groove. When the button approaches the bottom of the sliding groove, the two groups of push rods are in the giving space state. When the button moves away from the bottom of the sliding groove, the two groups of push rods are in the clamping state.

[0016] The inclined surfaces are arranged to move the button away from the push rod when the button slides in the direction of approaching the groove bottom of the sliding groove, so as to form the giving space state of the push rod and facilitate the up and down pushing of the button. After the button moves away from the groove bottom of the sliding groove, the button approaches the push rod to form the clamping state of the push rod clamped on both sides of the button, thereby achieving the locking of the button.

[0017] In some embodiments, the extension end of the adjusting rod group is provided with a second installation groove recessed into the adjusting rod group. The button is provided with an installation hole recessed into the button towards one side of the adjusting rod group, and a sliding column is arranged in the installation hole, and one end of the sliding column extends into the second installation groove. A second elastic member is connected between the sliding column and the groove bottom of the second installation groove. When the button is pressed, the button slides towards the bottom of the sliding groove, and the sliding column compresses the second elastic member to make the button separate from the push rod.

[0018] The sliding column slides in the corresponding second installation groove to make the sliding column drive the button to slide in the direction of approaching or moving away from the groove bottom of the sliding groove, thereby realizing the approaching or moving away of the button from the push rod. The second elastic member is arranged to press the button on the side close to the push rod, so that the push rod clamps the button to achieve the locking of the button.

[0019] With reference to the first aspect, in a possible implementation manner, the water-wetted auxiliary rod comprises: an outer connecting rod arranged in an L shape, one end of which is fixed on the outer peripheral wall of the detection main body, and the other end of which extends downward; a water-wetted needle fixed in the extended lower end of the outer connecting rod in the vertical direction, the lower end of the water-wetted needle being flush with the extended end of the cold lead set.

[0020] The outer connecting rod is arranged to connect the water-wetted needle to the outer peripheral wall of the detection main body, thereby fixing the water-wetted needle. The water-wetted needle is flush with the extended end of the cold lead set, thereby avoiding interference between the water-wetted needle and the pin when the water-wetted needle is too long, and avoiding affecting the water-wetting and dripping process of the refrigerant when the water-wetted needle is too short.

[0021] With reference to the first aspect, in a possible implementation manner, the liquid nitrogen cylinder comprises: a metal barrel, the top of which is open, the bottom of which extends downward into the containing cavity, and the inner wall of which is fixed to the inner wall of the containing cavity; the metal barrel is used to contain liquid nitrogen; wherein the upper end of the cold lead set is fixed in the metal barrel; a rubber plug, which is detachably connected to the top open side of the metal barrel; and a heat preservation layer, which is annularly sleeved and fixed on the outer peripheral wall of the metal barrel, and the outer peripheral wall of which is fixed to the inner wall of the containing cavity.

[0022] The rubber plug is arranged to facilitate the closing and opening of the top of the metal barrel, thereby achieving the addition and closing of the liquid nitrogen. The heat preservation layer is arranged to avoid the direct transmission of the cold energy of the liquid nitrogen to the detection main body, thereby affecting the operation process of the detection personnel.

[0023] In the second aspect, the embodiments of the present application further provide a detection method, which is detected by using the electronic component pin firmness detection device, and the detection method comprises the following steps: injecting liquid nitrogen into the liquid nitrogen cylinder to transmit the cold energy of the liquid nitrogen to the extended end of the cold lead set; making the lower end of the water-wetted auxiliary rod wet the refrigerant; moving the detection main body to make the lower end of the water-wetted auxiliary rod contact the pin to be detected, so as to transfer the refrigerant to the pin plating layer; placing the extended end of the cold lead set on the pin plating layer, so that the extended end of the cold lead set is frozen on the pin plating layer through the refrigerant; pulling the detection main body, if the pin plating layer is loose, the firmness of the pin to be detected does not meet the requirements; if the pin plating layer is not loose, the firmness of the pin to be detected meets the requirements.

[0024] The detection method provided by the application has all the beneficial effects of the electronic component pin firmness detection device, can adapt to small-area and small-size pin structures and narrow spaces, has a wide application range, and is simple to operate and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0026] Figure 1 A structural schematic diagram of the electronic component pin firmness detection device provided by the embodiments of the application is shown in the figure. Figure 2 A structural schematic diagram of the electronic component pin firmness detection device provided by the embodiments of the application is shown in the figure. Figure 1 A sectional structural schematic diagram of the electronic component pin firmness detection device provided by the embodiments of the application is shown in the figure. Figure 3 A structural schematic diagram of the electronic component pin firmness detection device provided by the embodiments of the application is shown in the figure. Figure 2 An enlarged structural schematic diagram of the locking assembly at B in the electronic component pin firmness detection device provided by the embodiments of the application is shown in the figure. Figure 1 ; Figure 4 An enlarged structural schematic diagram of the locking assembly at B in the electronic component pin firmness detection device provided by the embodiments of the application is shown in the figure. Figure 2 ; Figure 2 ; Figure 5 An enlarged structural schematic diagram of the locking assembly at B in the electronic component pin firmness detection device provided by the embodiments of the application is shown in the figure. Figure 2 . Figure 3

[0027] In the figure: 1, detection main body; 11, containing cavity; 12, sliding groove; 13, first installation groove; 2, liquid nitrogen cylinder; 21, metal barrel; 22, rubber plug; 23, heat preservation layer; 3, water dipping auxiliary rod; 31, outer connecting rod; 32, water dipping needle; 4, cold conducting rod group; 41, first cold conducting rod; 42, second cold conducting rod; 5, adjusting rod group; 51, connecting plate; 52, inner connecting rod; 521, second installation groove; 53, first elastic member; 6, locking assembly; 61, button; 611, installation hole; 612, sliding column; 613, second elastic member; 62, push rod; 63, limiting plate; 64, moving plate; 65, third elastic member; 66, guide block; 7, guide plate. DETAILED DESCRIPTION

[0028] ​To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] It should be noted that the vertical direction used in this application refers to the axial direction of the detection body 1, and the up-down direction also refers to the up-down direction of the detection body 1, i.e., the attached... Figure 1 The liquid nitrogen cylinder 2 of the detection body 1 is used to hold liquid nitrogen and is usually placed vertically. When the detection body 1 is tilted or placed horizontally, the end of the detection body 1 with the liquid nitrogen cylinder 2 is the upper end and the end of the cooling rod group 4 that extends out is the lower end.

[0032] Please refer to the following: Figures 1 to 5 This application describes the electronic component pin adhesion testing device and method. The electronic component pin adhesion testing device includes a testing body 1, a liquid nitrogen cylinder 2, a cooling rod assembly 4, and a water-soaked auxiliary rod 3. The testing body 1 has an internal receiving cavity 11. The liquid nitrogen cylinder 2 is located on the upper part of the receiving cavity 11 and is fixedly connected to the inner wall of the testing body 1. The cooling rod assembly 4 is vertically positioned within the receiving cavity 11. The upper end of the cooling rod assembly 4 extends upward into the liquid nitrogen cylinder 2, and the lower end extends downward out of the testing body 1. The water-soaked auxiliary rod 3 is fixed to the outer peripheral wall of the testing body 1, with one end extending downward to be flush with the extended end of the cooling rod assembly 4. The water-soaked auxiliary rod 3 is used to drip cooling liquid onto the pin plating. The cooling rod assembly 4 is used to transfer the cooling energy of the liquid nitrogen in the liquid nitrogen cylinder 2 to the pin plating, thereby freezing the lower end of the cooling rod assembly 4 to the pin plating through the cooling liquid.

[0033] It should be understood that the liquid nitrogen cylinder 2 is used to contain liquid nitrogen, and the cold lead group 4 is selected from a metal material with a high heat conduction rate, generally copper, and is used to transfer the cold energy in the liquid nitrogen. Specifically, the cold energy transfer path is liquid nitrogen, cold lead group 4, frozen liquid, and pin plating layer.

[0034] It should be understood that the surface of the to-be-detected pin is covered with a pin plating layer. In order to detect the firmness of the connection between the pin plating layer and the to-be-detected pin, the present application drips frozen liquid on the pin plating layer. When the cold lead group 4 passes through the frozen liquid and contacts the pin plating layer, the cold energy is transferred to the frozen liquid and the pin plating layer, and the frozen liquid freezes the pin plating layer and the extended end of the cold lead group 4 together.

[0035] Specifically, if the connection stability between the pin plating layer and the to-be-detected pin is good, or the connection firmness is good, the pin plating layer will not separate from the to-be-detected pin. Conversely, if the connection stability between the pin plating layer and the to-be-detected pin is poor, or the connection firmness is insufficient, the pin plating layer will partially or completely separate from the to-be-detected pin.

[0036] It should be noted that the cross-sectional area of the water-dipping end of the water-dipping auxiliary rod 3 and the cross-sectional area of the extended end of the cold lead group 4 can be selectively set according to actual needs. When facing small-area pins or narrow spaces in the present application, small cross-sectional area structures can be specifically set to meet the use requirements.

[0037] Optionally, a replaceable pen head is arranged at the extended end of the cold lead group 4. Specifically, a threaded hole is arranged at the extended end of the cold lead group 4. The pen head includes a first segment and a second segment connected in sequence. The first segment is provided in multiple forms with different pen end cross sections. The second segment is provided with external threads and is used to be connected in the threaded hole. The multiple first segments with different cross-sectional areas are used to adapt to pin plating layers with different cross-sectional sizes. In use, the pen head can be adaptively selected according to the size of the pin plating layer.

[0038] Specifically, after the water-dipping auxiliary rod 3 dips the frozen liquid, the water-dipping end of the water-dipping auxiliary rod 3 is brought into contact with the pin plating layer, so that the frozen liquid is transferred to the pin plating layer under the action of gravity and is dispersed on the surface of the pin plating layer. Specifically, the number of water-dipping drops and the number of times can be selectively set according to actual needs.

[0039] Preferably, the frozen liquid is selected from water. Under the action of the cold energy of the cold lead group 4, the water can freeze the extended end of the cold lead group 4 and the pin plating layer.

[0040] Further, a test head is arranged at the extended end of the cold lead group 4. Optionally, the end of the test head is planarized. The test head is also selected from a metal material with a high heat conduction rate, generally copper, to facilitate the transfer of cold energy.

[0041] Compared with the prior art, the water-wetted auxiliary rod 3 can cover the plating layer of the pin with the frozen liquid, the liquid nitrogen is filled in the liquid nitrogen cylinder 2 to provide frozen cold, and the cold is transmitted to the pin to be detected and the frozen liquid through the cold lead rod group 4, so that the extension end of the cold lead rod group 4 is fixed with the plating layer of the pin through the frozen liquid, thereby facilitating the formation of a pulling force between the plating layer of the pin and the cold lead rod group 4 when the detection main body 1 is pulled, and the firmness of the plating layer of the pin is determined according to the loosening condition of the plating layer of the pin, and the reliability of the pin to be detected is judged.

[0042] The water-wetted end of the water-wetted auxiliary rod 3 and the cold lead end of the cold lead rod group 4 have small cross-sectional areas, compared with the large-size structure of the adhesive bonding area, the water-wetted auxiliary rod 3 in the application can adjust the contact area between the cold lead rod group 4 and the plating layer of the pin by reasonably configuring the cross-sectional area of the end face, thereby adapting to the small-area and small-size pin structure and the detection of the firmness of the plating layer of the pin in a narrow space, and having a wide range of applications.

[0043] In addition, in the application, the cold lead rod group 4 and the plating layer of the pin are frozen through the cold of the liquid nitrogen, which can resist the freezing effect of the frozen liquid through the pulling force, and then the firmness of the plating layer of the pin is obtained, the measurement process is simple, and the operation is convenient and good in convenience.

[0044] Optionally, the cold lead rod group 4 is a third cold lead rod, one end of the third cold lead rod extends upward into the liquid nitrogen cylinder 2 and is fixed with the liquid nitrogen cylinder 2, and the other end extends downward out of the detection main body 1, for realizing the freezing of the frozen liquid, the plating layer of the pin and the extension end of the third cold lead rod.

[0045] Please refer to Figure 1 In some possible embodiments, the cold lead rod group 4 includes a first cold lead rod 41 and a second cold lead rod 42; the first cold lead rod 41 is fixed in the liquid nitrogen cylinder 2 and extends downward into the containing cavity 11 at one end; the second cold lead rod 42 is coaxially arranged below the first cold lead rod 41; the second cold lead rod 42 is slidingly connected in the containing cavity 11 in the vertical direction; the second cold lead rod 42 has a first state of sliding to the upper end and abutting against the first cold lead rod 41, and also has a second state of sliding to the upper end and being disconnected from the first cold lead rod 41; wherein when the second cold lead rod 42 is in the first state, the liquid nitrogen in the liquid nitrogen cylinder 2 is used to transmit the cold to the second cold lead rod 42 through the first cold lead rod 41, and the second cold lead rod 42 is used to abut against the plating layer of the pin, so that the second cold lead rod 42 freezes the lower end of the second cold lead rod 42 and the plating layer of the pin through the frozen liquid.

[0046] It should be noted that in the first state, the upper end of the second cold lead rod 42 abuts against the first cold lead rod 41; in the second state, the upper end of the second cold lead rod 42 is disconnected from the first cold lead rod 41.

[0047] It needs to be understood that when the second cold guide 42 is in the second state, since the upper end of the second cold guide 42 is disconnected from the first cold guide 41, the cold energy of the liquid nitrogen in the liquid nitrogen cylinder 2 cannot be transmitted to the second cold guide 42 through the first cold guide 41, and the temperature on the second cold guide 42 gradually rises at room temperature and recovers.

[0048] By setting the fixed first cold guide 41 for realizing the export of the cold energy of the liquid nitrogen, and by setting the second cold guide 42 for realizing the transmission of the cold energy from the first cold guide 41 to the pin plating layer, and by making the second cold guide 42 have the telescopic function, the second cold guide 42 can realize the first state of transmitting the cold energy with the first cold guide 41 when working, and the second state of being disconnected from the first cold guide 41 when not working, so as to cut off the transmission of the cold energy.

[0049] The second cold guide 42 can realize the switching between the first state and the second state when sliding up and down.

[0050] The first cold guide 41 and the second cold guide 42 are coaxially arranged, which can facilitate the abutment of the upper end of the second cold guide 42 with the lower end of the first cold guide 41 when the second cold guide 42 moves upward, and thus realize the transmission of the cold energy.

[0051] Optionally, the top of the second cold guide 42 can be provided with an annular insertion slot to facilitate the insertion of the first cold guide 41 and realize the transmission of the cold energy and improve the transmission speed of the cold energy.

[0052] Illustratively, the detection main body 1 is provided with a guide plate 7, and the guide plate 7 is provided with a guide hole suitable for the up-and-down sliding of the second cold guide 42.

[0053] Specifically, the guide plate 7 is provided with two groups, and the two groups of guide plates 7 are arranged in an up-and-down interval to realize the movement guidance of the second cold guide 42.

[0054] Please refer to Figure 1 and Figure 2 In some embodiments, the electronic component pin firmness detection device further comprises an adjusting rod group 5 and a locking assembly 6; the adjusting rod group 5 is arranged in the accommodating cavity 11 and connected with the second cold guide 42 at one end and penetrates out of the peripheral wall of the detection main body 1 at the other end; the locking assembly 6 is arranged between the detection main body 1 and the protruding end of the adjusting rod group 5; wherein the adjusting rod group 5 is used for sliding up and down in the accommodating cavity 11 with the second cold guide 42, and the locking assembly 6 is used for limiting the adjusting rod group 5 when the second cold guide 42 slides to the first state or the second state.

[0055] By setting the adjusting rod group 5, the up and down movement of the second cold guide rod 42 can be conveniently driven, and the freedom of the up and down extension of the second cold guide rod 42 is realized; by setting the locking assembly 6, the position of the adjusting rod group 5 can be limited after the second cold guide rod 42 is moved to the position, so as to avoid affecting the accuracy of measurement due to the movement of the cold guide rod group 4.

[0056] Optionally, the number of the adjusting rod group 5 and the locking rod group can be selectively set according to actual needs.

[0057] It should be understood that one end of the adjusting rod group 5 extends out of the circumferential wall of the detection main body 1, and the up and down movement of the adjusting rod group 5 can be conveniently realized by adjusting the extending end of the adjusting rod group 5, and the up and down movement of the second cold guide rod 42 is driven by the up and down movement of the adjusting rod group 5.

[0058] Specifically, a gap hole suitable for the adjusting rod group 5 to pass through is arranged on the detection main body 1, and preferably, the gap hole is a long hole extending along the axial direction of the detection main body 1; specifically, when the extending end of the adjusting rod group 5 is moved up and down, the extending end of the adjusting rod group 5 can slide up and down in the long hole.

[0059] It should be understood that since the guide plate 7 is arranged and the lower end of the second cold guide rod 42 extends out of the detection main body 1, the extension direction of the second cold guide rod 42 is along the axial direction, and the extending end of the adjusting rod group 5 also moves up and down in the long hole along the axial direction of the detection main body 1.

[0060] Specifically, in order to conveniently set the above-mentioned locking assembly 6, a boss can be arranged on the outer circumferential wall of the detection main body 1, and a long hole is arranged on the boss so as to extend the adjusting rod group 5; the locking assembly 6 is also arranged on the boss so as to lock or limit the extending end of the adjusting rod group 5.

[0061] Please refer to Figure 1 , for example, the adjusting rod group 5 includes a connecting plate 51, an inner connecting rod 52 and a first elastic member 53; the connecting plate 51 is fixed on the second cold guide rod 42; one end of the inner connecting rod 52 is fixed with the connecting plate 51; the other end of the inner connecting rod 52 extends upward and horizontally passes through the circumferential wall of the detection main body 1 and is connected with the locking assembly 6; the first elastic member 53 is sleeved on the second cold guide rod 42; one end of the first elastic member 53 is fixed with the connecting plate 51, and the other end extends downward and is fixed on the bottom of the accommodating cavity 11; wherein, when the extending end of the inner connecting rod 52 is pushed up and down, the inner connecting rod 52 drives the second cold guide rod 42 to slide up and down through the connecting plate 51; the first elastic member 53 is used for resetting the second cold guide rod 42 from the second state to the first state.

[0062] The second cold guide rod 42 is connected with the inner connecting rod 52 through the connecting plate 51, so that the second cold guide rod 42 moves up and down when the inner connecting rod 52 moves up and down. The second cold guide rod 42 is retracted and switched from the second state to the first state through the first elastic member 53, so that the second cold guide rod 42 is reset.

[0063] Specifically, the connecting plate 51 is a circular plate structure, and one end of the second cold guide rod 42 is arranged on the upper end of the connecting plate 51, and the other end passes through the connecting rod downward and extends out of the detection main body 1. Further, the connecting plate 51 is fixedly connected with the second cold guide rod 42.

[0064] Optionally, the connecting plate 51 is arranged between the two guide plates 7, and the two guide plates 7 are used to limit the position of the connecting plate 51 and limit the sliding distance of the second cold guide rod 42 during the up and down movement of the connecting plate 51 and the second cold guide rod 42.

[0065] Based on the positional relationship between the connecting plate 51 and the guide plate 7, the first elastic member 53 is arranged between the connecting plate 51 and the lower guide plate 7. Specifically, one end of the first elastic member 53 is fixed with the connecting plate 51, and the other end is fixed with the lower guide plate 7.

[0066] Specifically, the inner connecting rod 52 is in L shape, one side of the L-shaped inner connecting rod 52 is parallel to the second cold guide rod 42 and is fixed on the connecting plate 51, and the other side is perpendicular to the second cold guide rod 42 and horizontally passes through the side wall of the detection main body 1.

[0067] It should be understood that when the second cold guide rod 42 extends downward, that is, when the second cold guide rod 42 is in the second state, the first elastic member 53 is in a compressed state, and at this time the locking assembly 6 locks the extension end of the adjusting rod assembly 5. When the locking assembly 6 releases the extension end of the adjusting rod assembly 5, the first elastic member 53 is released, and the second cold guide rod 42 and the inner connecting rod 52 are moved upward through the connecting plate 51, so that the second cold guide rod 42 is reset to the first state.

[0068] Optionally, the locking assembly 6 uses a limiting bolt, and when the inner connecting rod 52 drives the second cold guide rod 42 to slide downward to the second state, one end of the limiting bolt passes through the boss and is screwed on the extension end of the inner connecting rod 52 to limit the inner connecting rod 52.

[0069] Optionally, the locking assembly 6 uses a limiting rod, and when the inner connecting rod 52 drives the second cold guide rod 42 to slide downward to the second state, one end of the limiting rod passes through the boss and the extension end of the inner connecting rod 52 in sequence to limit the inner connecting rod 52.

[0070] When the second cold guide rod 42 needs to be reset, the limiting bolt or the limiting rod can be taken out to release the limiting of the locking assembly 6.

[0071] Referring to Figure 3 and Figure 4 In some embodiments, the detection main body 1 is provided with a sliding groove 12 extending in the vertical direction; two first installation grooves 13 are symmetrically arranged on the two side groove walls of the sliding groove 12; and the first installation grooves 13 are arranged close to the lower end of the sliding groove 12; the locking assembly 6 includes a button 61 and two groups of push rods 62; the button 61 is slidingly arranged in the sliding groove 12 and is connected with the extension end of the adjusting rod group 5; the two groups of push rods 62 are arranged in one-to-one correspondence with the two groups of first installation grooves 13; one end of each push rod 62 is connected in the corresponding first installation groove 13, and the other end has the freedom of extension and retraction along the axial direction thereof; wherein, the two groups of push rods 62 have a clamping state of clamping on both sides of the button 61, and also have a giving state of moving away from the button 61.

[0072] Specifically, the groove bottom of the sliding groove 12 is provided with the above-mentioned long hole, and the extension end of the inner connecting rod 52 extends from the long hole. The sliding groove 12 is used to provide a sliding space for the up-and-down sliding of the button 61; and the first installation groove 13 is used to facilitate the arrangement of the above-mentioned push rod 62.

[0073] The first installation groove 13 is arranged at the lower end of the sliding groove 12, so that when the second cold lead rod 42 is extended, the push rod 62 can clamp the outer peripheral wall of the button 61 to achieve the clamping state, thereby achieving the locking of the button 61; since the button 61 is connected with the extension end of the adjusting rod group 5, the locking of the button 61 can achieve the locking of the adjusting rod group 5, avoiding the movement of the second cold lead rod 42. When the second cold lead rod 42 is finished working, the push rod 62 can be in the giving state to release the button 61, so that the adjusting rod group 5 drives the second cold lead rod 42 to reset to the first state under the action of the first elastic member 53.

[0074] Optionally, a clamping structure is formed between the two groups of push rods 62 and the outer peripheral wall of the button 61, when the extension end of the inner connecting rod 52 slides to the push rod 62, the end of the push rod 62 is clamped on the outer peripheral wall of the inner connecting rod 52 to achieve the clamping state; when the button 61 is pushed downward, the button 61 is separated from the two push rods 62, and the giving state is formed between the two push rods 62. Optionally, the push rod 62 is fixed in the above-mentioned first installation groove 13.

[0075] Optionally, referring to Figure 5 , the two groups of push rods 62 are selected to be electric telescopic rods, the electric telescopic rods are extended to abut against the outer side wall of the button 61, and the two groups of buttons 61 are simultaneously extended to clamp the button 61, so as to achieve the clamping state of the two groups of push rods 62; conversely, when the locking assembly 6 needs to be released, the two groups of electric telescopic rods can be simultaneously retracted to form the above-mentioned giving state.

[0076] Referring to Figure 3 and Figure 4For example, the two side walls of the sliding groove 12 are inclined surfaces, and the two inclined surfaces are closer to each other in a direction away from the bottom of the sliding groove 12. The button 61 is slidably connected to the extending end of the adjusting rod group 5 in a direction approaching or away from the bottom of the sliding groove 12. When the button 61 approaches the bottom of the sliding groove 12, the two groups of push rods 62 are in a disengaged state. When the button 61 is away from the bottom of the sliding groove 12, the two groups of push rods 62 are in a clamped state.

[0077] By setting the inclined surfaces, when the button 61 slides in a direction approaching the bottom of the sliding groove 12, the button 61 is away from the push rods 62, thereby forming a disengaged state of the push rods 62 to facilitate pushing the button 61 up and down. When the button 61 is away from the bottom of the sliding groove 12, the button 61 approaches the push rods 62, so that the push rods 62 are clamped on both sides of the button 61, forming a clamped state, thereby achieving the locking of the button 61.

[0078] It should be understood that the two inclined surfaces are closer to each other in a direction away from the bottom of the sliding groove 12, so the distance between the two inclined surfaces is not equal. When the button 61 slides in a direction perpendicular to the radial direction of the second cooling guide rod 42, since the side wall of the button 61 is an inclined surface, the button 61 will gradually disengage from the two push rods 62, or the button 61 will be clamped between the two push rods 62.

[0079] Please refer to Figure 3 or Figure 4 In some embodiments, the extending end of the adjusting rod group 5 is provided with a second installation groove 521 recessed into the adjusting rod group 5. The side of the button 61 facing the adjusting rod group 5 is provided with an installation hole 611 recessed into the button 61, and a slide column 612 is arranged in the installation hole 611, and one end of the slide column 612 extends into the second installation groove 521. A second elastic member 613 is connected between the slide column 612 and the bottom of the second installation groove 521. When the button 61 is pressed, the button 61 slides towards the bottom of the sliding groove 12, and the slide column 612 compresses the second elastic member 613, so that the button 61 disengages from the push rods 62.

[0080] By sliding the slide column 612 in the corresponding second installation groove 521, the slide column 612 drives the button 61 to slide in a direction approaching or away from the bottom of the sliding groove 12, thereby achieving the button 61 approaching or away from the push rods 62. By setting the second elastic member 613, the button 61 can be pressed against one side close to the push rods 62, so that the push rods 62 clamp the button 61, achieving the locking of the button 61.

[0081] When the button 61 is pressed, the pressing force makes the button 61 disengage from the push rods 62 on both sides, so that the push rods 62 on both sides can no longer clamp the button 61, and the button 61 slides to the bottom of the sliding groove 12 under the pressing force and gradually disengages from the push rods 62 on both sides, and the push rods 62 on both sides also change from the clamping state to the yielding state. Under the action of the first elastic member 53 and the pushing of the detection personnel, the button 61 slides upward on the sliding groove 12 to make the second cold guide rod 42 abut against the first cold guide rod 41, so as to realize the transfer of cold energy to the second cold guide rod 42.

[0082] When the second cold guide rod 42 completes the absorption of cold energy, the button 61 is pressed and pushed to slide downward until the second cold guide rod 42 extends out of the detection main body 1, the connecting plate 51 presses the first elastic member 53, and the button 61 slides downward to the locking assembly 6, the button 61 is released, the button 61 is reset under the action of the second elastic member 613, and the two inclined surface structures of the button 61 abut against or are clamped with the push rods 62 on the corresponding sides, the push rods 62 realize the clamping state, so as to realize the limiting of the button 61, and further realize the limiting of the second cold guide rod 42.

[0083] For example, the push rod 62 is fixed in the corresponding mounting groove and can be clamped with the push rod 62 after the button 61 is reset.

[0084] For example, the push rod 62 is an electric telescopic rod, which can push the two groups of push rods 62 to be opposite to each other after the button 61 is reset, so as to be clamped on the inclined surface structures on both sides or be clamped on the two side walls of the button 61, so as to realize the clamping state of the push rod 62.

[0085] For example, the first mounting groove 13 is provided with a limiting plate 63, a moving plate 64 and a third elastic member 65; the limiting plate 63 is arranged on the connecting side of the first mounting groove 13 and the sliding groove 12 and is fixedly connected with the groove wall of the first mounting groove 13; the moving plate 64 is parallel to the limiting plate 63 and is fixed on the push rod 62; one end of the third elastic member 65 is fixed on the moving plate 64 and the other end abuts against the bottom of the first mounting groove 13; wherein one end of the push rod 62 extends to the bottom of the second mounting groove 521 in sequence through the limiting plate 63, the moving plate 64 and the third elastic member 65; when the button 61 is released, the two groups of push rods 62 are pressed on the button 61 under the pressure action of the third elastic member 65 to form the clamping state; It should be understood that when the push rod 62 is in the clamping state, the third elastic member 65 is in the compressed state and can press the push rod 62 on the outer peripheral wall of the button 61; when the push rod 62 is in the yielding state, the button 61 has disengaged from the push rod 62, at this time the third elastic member 65 can move away from the groove bottom of the first mounting groove 13 and slide out the push rod 62 under the action of inertia, but since the limiting plate 63 is arranged in the first mounting groove 13, the moving plate 64 and the push rod 62 will not disengage from the first mounting groove 13.

[0086] In addition, a guide block 66 can be arranged at the end of the push rod 62 placed in the first mounting groove 13 to guide the movement of the push rod 62.

[0087] Alternatively, the locking assembly 6 can also be selected with other locking structures, such as the locking block of a retractable pen.

[0088] Please refer to Figure 1 In some possible embodiments, the water-wetting auxiliary rod 3 comprises an outer connecting rod 31 and a water-wetting needle 32. The outer connecting rod 31 is arranged in an L shape, one end of which is fixed to the outer peripheral wall of the detection main body 1, and the other end of which extends downward. The water-wetting needle 32 is fixed to the extended lower end of the outer connecting rod 31 in the vertical direction. The lower end of the water-wetting needle 32 is flush with the extended end of the cold-lead set 4.

[0089] By arranging the outer connecting rod 31, the water-wetting needle 32 is connected to the outer peripheral wall of the detection main body 1, thereby fixing the water-wetting needle 32. By arranging the water-wetting needle 32 flush with the extended end of the cold-lead set 4, interference between the water-wetting needle 32 and the pin when the water-wetting needle 32 extends too long can be avoided, and the process of water-wetting and dripping of the refrigerant can be affected when the water-wetting needle 32 extends too short.

[0090] The outer connecting rod 31 can be welded and fixed to the outer peripheral wall of the detection main body 1 to fix the water-wetting needle 32 to the detection main body 1, thereby avoiding the loss of the water-wetting auxiliary rod 3.

[0091] Alternatively, the water-wetting auxiliary rod 3 can be selected not to be fixed to the detection main body 1, but to be connected to the connecting lug or connecting hole on the detection main body 1 through a connecting line, so as to avoid loss.

[0092] Specifically, the outer connecting rod 31 is in an L shape, which facilitates the downward installation of the water-wetting needle 32. Specifically, the water-wetting needle 32 is fixed to the outer connecting rod 31 and extends downward in the vertical direction.

[0093] Alternatively, the outer connecting rod 31 parallel to one side of the second cold-lead 42 can be arranged in a telescopic structure to adjust the height of the water-wetting needle 32 up and down. Specifically, it can be a sleeve and screw structure, or a sliding rod assembly, or an electric telescopic rod structure, etc.

[0094] Alternatively, the water-wetting auxiliary rod 3 is fixedly connected to the detection main body 1, and at this time, the outer connecting rod 31 is fixedly connected between the detection main body 1.

[0095] Alternatively, the water-wetting auxiliary rod 3 can be rotatably connected to the detection main body 1, so as to rotate the water-wetting tip of the water-wetting auxiliary rod 3 upward in the non-working state to avoid accidental injury. Specifically, the outer connecting rod 31 is rotatably connected to the outer peripheral wall of the detection main body 1.

[0096] Please refer to Figure 1In some possible embodiments, the liquid nitrogen cylinder 2 comprises a metal barrel 21, a rubber plug 22 and a thermal insulation layer 23; the metal barrel 21 is open at the top and extends downward into the accommodating cavity 11 at the bottom, and is fixed with the inner wall of the accommodating cavity 11; the metal barrel 21 is used to contain liquid nitrogen; wherein the upper end of the cold lead group 4 is fixed in the metal barrel 21; the rubber plug 22 is detachably connected to the open top side of the metal barrel 21; the thermal insulation layer 23 is annularly sleeved and fixed on the outer peripheral wall of the metal barrel 21, and the outer peripheral wall of the thermal insulation layer 23 is fixed with the inner wall of the accommodating cavity 11.

[0097] By arranging the rubber plug 22, the top of the metal barrel 21 can be conveniently closed and opened to realize the addition of the liquid nitrogen; by arranging the thermal insulation layer 23, the cold energy of the liquid nitrogen can be avoided from being directly transmitted to the detection main body 1, thereby affecting the operation process of the detection personnel.

[0098] Specifically, the rubber plug 22 is clamped on the open top side of the metal barrel 21, or the rubber plug 22 is in interference fit with the opening of the top of the metal barrel 21, so as to close the top of the metal barrel 21.

[0099] Optionally, the thermal insulation layer 23 is made of a material with a low cold lead rate, so as to avoid the waste of cold energy in the metal barrel 21, and meanwhile avoid the over-freezing of the detection main body 1 to injure the detection personnel.

[0100] Based on the same inventive concept, the application also provides a detection method, which is detected by the electronic component pin firmness detection device, and comprises the following steps: first, injecting liquid nitrogen into the liquid nitrogen cylinder 2 to transmit the cold energy of the liquid nitrogen to the extending end of the cold lead group 4; second, dipping the lower end of the water-dipping auxiliary rod 3 in the frozen liquid; third, moving the detection main body 1 to make the lower end of the water-dipping auxiliary rod 3 contact with the pin to be detected, so as to transfer the frozen liquid to the pin plating layer; fourth, placing the extending end of the cold lead group 4 on the pin plating layer, so that the extending end of the cold lead group 4 is frozen on the pin plating layer through the frozen liquid; and fifth, pulling the detection main body 1, if the pin plating layer is loose, the firmness of the pin to be detected does not meet the requirements; if the pin plating layer is not loose, the firmness of the pin to be detected meets the requirements.

[0101] Specifically, when the cold guide rod set 4 comprises the first cold guide rod 41 and the second cold guide rod 42, the detection method comprises the following steps: injecting liquid nitrogen into the liquid nitrogen cylinder 2, and placing the second cold guide rod 42 in the first state; dipping the lower end of the water-dipping auxiliary rod 3 in the frozen liquid; moving the detection main body 1 to make the lower end of the water-dipping auxiliary rod 3 contact the pin plating layer, so that the frozen liquid is transferred to the pin plating layer; the second cold guide rod 42 remains in the first state, and the extending end of the second cold guide rod 42 is placed on the pin plating layer, so that the extending end of the second cold guide rod 42 is frozen on the pin plating layer through the frozen liquid; pulling the detection main body 1, if the plating layer on the to-be-detected pin is loose, the firmness of the pin plating layer does not meet the requirements; if the plating layer on the to-be-detected pin is not loose, the firmness of the pin plating layer meets the requirements.

[0102] In addition, after the detection is completed, the second cold guide rod 42 is switched from the first state to the second state, so that the temperature of the second cold guide rod 42 gradually recovers, the pin plating layer is unfrozen, and then the second cold guide rod 42 is separated from the pin plating layer.

[0103] Further, when the second cold guide rod 42 slides downward to the extending end of the detection main body 1 and is in the second state, the extending end of the adjusting rod set 5 is locked by the locking assembly 6 to limit the second cold guide rod 42.

[0104] Specifically, when the second cold guide rod 42 is in the second state, the button 61 is loosened, so that the button 61 is clamped or clamped between the two groups of push rods 62, avoiding the movement of the second cold guide rod 42, at this time, the two groups of push rods 62 are in the clamping state; when detection is needed, the button 61 can be pressed, so that the two groups of push rods 62 are in the yielding state, then the button 61 is pushed upward, and the second cold guide rod 42 and the connecting plate 51 are reset upward to the first state under the action of the first elastic member 53, so as to detect in the first state.

[0105] It should be noted that after the two groups of push rods 62 are in the yielding state, the button 61 needs to be pushed upward by a certain distance to avoid the button 61 being reset between the two groups of push rods 62 under the action of the second elastic member 613; or directly push the button 61 upward, so that the button 61 slides upward and the second cold guide rod 42 is reset to the first state.

[0106] The detection method provided by the application has all the beneficial effects of the electronic component pin firmness detection device, can adapt to small-area and small-size pin structures, and meet the needs of narrow space, and has wide application range.

[0107] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. An electronic component pin firmness testing apparatus, characterized by, The utility model relates to a kind of electronic component pin firmness detection device, including: Detection main body (1), internally provided with containing cavity (11); Liquid nitrogen cylinder (2), is located in the upper portion of the containing cavity (11), and is fixedly connected with the inner wall of the detection main body (1); Cold guide rod group (4), is located in the containing cavity (11) along vertical direction;The upper end of the cold guide rod group (4) is stretched into the liquid nitrogen cylinder (2) upward, and lower end is stretched out of the detection main body (1) downward;And Water-wetted auxiliary rod (3), is fixed on the outer circumferential wall of the detection main body (1), and one end extends downward to the extension end of the cold guide rod group (4); Wherein, the water-wetted auxiliary rod (3) is used to drop frozen liquid on pin plating layer;The cold guide rod group (4) is used to transmit the cold energy of liquid nitrogen in the liquid nitrogen cylinder (2) to the pin plating layer, to freeze the lower end of the cold guide rod group (4) and the pin plating layer by the frozen liquid.

2. The electronic component lead strength testing apparatus of claim 1, wherein The cold guide rod group (4) includes: First cold guide rod (41), is fixed in the liquid nitrogen cylinder (2), and one end penetrates into the containing cavity (11) downward; Second cold guide rod (42), coaxially arranged below the first cold guide rod (41);The second cold guide rod (42) is slidably connected in the containing cavity (11) along vertical direction;The second cold guide rod (42) has the first state of sliding to the upper end and abutting against the first cold guide rod (41), and also has the second state of sliding to the upper end and disconnecting with the first cold guide rod (41); Wherein, when the second cold guide rod (42) is in the first state, the liquid nitrogen in the liquid nitrogen cylinder (2) is used to transmit the cold energy to the second cold guide rod (42) through the first cold guide rod (41), and the second cold guide rod (42) is used to abut against the pin plating layer, so that the second cold guide rod (42) freezes the lower end of the second cold guide rod (42) and the pin plating layer through the frozen liquid.

3. The electronic component lead strength testing apparatus of claim 2, wherein The electronic component pin firmness detection device further includes: Adjusting rod group (5), is located in the containing cavity (11), one end is connected with the second cold guide rod (42), and the other end penetrates out of the circumferential wall of the detection main body (1); Locking assembly (6), is arranged between the detection main body (1) and the extension end of the adjusting rod group (5); Wherein, the adjusting rod group (5) is used to slide up and down in the containing cavity (11) with the second cold guide rod (42), and the locking assembly (6) is used to limit the adjusting rod group (5) when the second cold guide rod (42) slides to the first state or the second state.

4. The electronic component lead strength testing apparatus of claim 3, wherein The adjusting rod group (5) includes: Connecting plate (51), is fixed on the second cold guide rod (42); Inner connecting rod (52), one end is fixed with the connecting plate (51);The other end of the inner connecting rod (52) extends upward, and penetrates out of the circumferential wall of the detection main body (1) horizontally, and is connected with the locking assembly (6);And First elastic member (53), is sleeved on the second cold guide rod (42);One end of the first elastic member (53) is fixed with the connecting plate (51), and the other end extends downward and is fixed on the bottom of the containing cavity (11); Wherein, when the protruding end of the inner connecting rod (52) is pushed up and down, the inner connecting rod (52) drives the second cold guide rod (42) to slide up and down through the connecting plate (51); the first elastic member (53) is used for resetting the second cold guide rod (42) from the second state to the first state.

5. The electronic component lead strength testing apparatus of claim 3, wherein The detection main body (1) is provided with a sliding groove (12) extending in the vertical direction; two first installation grooves (13) are symmetrically arranged on the two side groove walls of the sliding groove (12); and the first installation groove (13) is arranged close to the lower end of the sliding groove (12); The locking assembly (6) comprises: A button (61) is slidingly arranged in the sliding groove (12) and connected with the protruding end of the adjusting rod group (5); Two groups of push rods (62) are arranged one by one corresponding to the two groups of first installation grooves (13); one end of each push rod (62) is connected in the corresponding first installation groove (13), and the other end has a freedom degree of extension along the axial direction thereof; Wherein, the two groups of push rods (62) have a clamping state of clamping on both sides of the button (61), and also have a giving space state of moving away from the button (61).

6. The electronic component lead robustness testing apparatus of claim 5, wherein The two side walls of the sliding groove (12) on both sides of the button (61) are both inclined surface structures, and the two inclined surface structures are closer to each other in the direction away from the bottom of the sliding groove (12); The button (61) is slidingly connected with the protruding end of the adjusting rod group (5) in the direction close to or away from the groove bottom of the sliding groove (12); When the button (61) is close to the bottom of the sliding groove (12), the two groups of push rods (62) are in the giving space state; when the button (61) is away from the bottom of the sliding groove (12), the two groups of push rods (62) are in the clamping state.

7. The electronic component lead robustness testing apparatus of claim 6, wherein the lead guide is a cylindrical rod having a diameter that is less than the diameter of the lead. The protruding end of the adjusting rod group (5) is provided with a second installation groove (521) recessed into the adjusting rod group (5); One side of the button (61) towards the adjusting rod group (5) is provided with a mounting hole (611) recessed into the button (61), and a sliding column (612) is arranged in the mounting hole (611), and one end of the sliding column (612) extends into the second installation groove (521); A second elastic member (613) is connected between the sliding column (612) and the groove bottom of the second installation groove (521); When the button (61) is pressed, the button (61) slides towards the bottom of the sliding groove (12), and the sliding column (612) compresses the second elastic member (613), so that the button (61) is separated from the push rod (62).

8. The electronic component lead robustness testing apparatus of claim 1, wherein The water-soaked auxiliary rod (3) comprises: An outer connecting rod (31) is arranged in an L shape, one end of which is fixed to the outer peripheral wall of the detection main body (1), and the other end extends downward; A water-soaked needle (32) is fixed to the lower end of the extension of the outer connecting rod (31) in the vertical direction; the lower end of the water-soaked needle (32) is flush with the protruding end of the cold guide rod group (4).

9. The electronic component lead robustness testing apparatus of claim 1, wherein The liquid nitrogen cylinder (2) comprises: A metal barrel (21) is open at the top and extends downward into the accommodating cavity (11) and is fixed to the inner wall of the accommodating cavity (11); the metal barrel (21) is used to contain liquid nitrogen; wherein the upper end of the cold conducting rod group (4) is fixed in the metal barrel (21); A rubber plug (22) is detachably connected to the open top side of the metal barrel (21); and A heat preservation layer (23) is annularly sleeved and fixed to the outer peripheral wall of the metal barrel (21), and the outer peripheral wall of the heat preservation layer (23) is fixed to the inner wall of the accommodating cavity (11).

10. A method of detection, characterized in that, The electronic component pin firmness detection device according to any one of claims 1-9 is used for detection, and the detection method comprises the following steps: Liquid nitrogen is injected into the liquid nitrogen cylinder (2) to transfer the coldness of the liquid nitrogen to the extending end of the cold conducting rod group (4); The lower end of the water-wetted auxiliary rod (3) is wetted with frozen liquid; The detection main body (1) is moved to make the lower end of the water-wetted auxiliary rod (3) contact the pin to be detected, so as to transfer the frozen liquid to the pin coating; The extending end of the cold conducting rod group (4) is placed on the pin coating, so that the extending end of the cold conducting rod group (4) is frozen on the pin coating through the frozen liquid; The detection main body (1) is pulled, if the pin coating is loose, then the firmness of the pin to be detected does not meet the requirements; if the pin coating is not moved, then the firmness of the pin to be detected meets the requirements.

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