Polarity-convertible diode performance test fixture

Abstract

The utility model discloses a diode performance test tool capable of converting polarity. The polarity-convertible diode performance test fixture comprises a base and a rotating disc, the base is provided with an accommodating cavity for accommodating the rotating disc, the accommodating cavity is provided with a rotating shaft connected to the base, the rotating disc is connected to the rotating shaft so as to enable the rotating disc to rotate around the rotating shaft, and the rotating disc is provided with a mounting position for placing a diode. The base is provided with the containing cavity for containing the rotating disc, the containing cavity is provided with the rotating shaft connected to the base, the rotating disc is connected to the rotating shaft so that the rotating disc can rotate around the rotating shaft, and the rotating disc is provided with the installation position for containing the diode; the polarity of the diode can be converted without being taken out, the problem that the polarity of the diode is reversely placed and the diode needs to be taken out and placed in again is solved, time consumption is reduced, and testing efficiency and the error-tolerant rate are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diode performance test fixtures, in particular to a diode performance test fixture with convertible polarity. Background Art

[0002] Currently, in the operation of testing the performance of diodes, most of them are to judge the polarity of the diode by naked eyes and then put it into the test fixture for testing. However, it is inevitable to make mistakes when identifying and judging by naked eyes. When the polarity of the diode is placed reversely, it is necessary to take out the diode and put it in again, resulting in a long time consumption and low test efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a diode performance test fixture with convertible polarity.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The embodiment of the utility model provides a diode performance test fixture with convertible polarity, including: a base and a turntable. The base is provided with a receiving cavity for receiving the turntable. The receiving cavity is provided with a rotating shaft connected to the base. The turntable is connected to the rotating shaft so that the turntable rotates around the rotating shaft. The turntable is provided with a mounting position for placing a diode.

[0006] In a specific embodiment, an arc-shaped track is provided at the bottom of the turntable, and a stop projection is provided on one side of the receiving cavity. The arc-shaped track is slidably connected to the stop projection; when the turntable is in the initial position, one end of the arc-shaped track contacts the stop projection. Rotate the turntable until the other end of the arc-shaped track contacts the stop projection, and the turntable rotates 180 degrees to convert the polarity of the diode.

[0007] In a specific embodiment, a positioning component is further provided near the stop projection in the receiving cavity. First and second grooves corresponding to the positioning component are provided on both sides of the turntable; when the turntable is in the initial position, the first groove is connected to the positioning component, and when the turntable rotates 180 degrees, the second groove is connected to the positioning component.

[0008] In a specific embodiment, the positioning component includes a ball, a spring member and a screw member. The base is provided with a mounting hole communicating with the receiving cavity. The screw member is located at the bottom of the base and connected to the mounting hole. The spring member is installed in the mounting hole and one end abuts against the screw member. The ball abuts against the spring member and a part of the ball protrudes from the mounting hole. The ball cooperates with the first groove or the second groove.

[0009] In a specific embodiment, the stop projection and the in-place component are at the same horizontal position.

[0010] In a specific embodiment, the rotating shaft includes a gear end and a fixed end. The gear end is connected to the base, and the fixed end is connected to the turntable by screws.

[0011] In a specific embodiment, a damping washer is also sleeved on the fixed end, and an annular groove corresponding to the damping washer is provided at the bottom of the turntable.

[0012] In a specific embodiment, a handle is further provided on one side of the turntable located at the installation position.

[0013] In a specific embodiment, an upper cover is also movably connected to the base. The upper cover is provided with a hook member, and the base is provided with a lock assembly corresponding to the hook member. The lock assembly includes a lock key and a spring body. One end of the spring body is fixed to the base, and the other end abuts against the lock key. The lock key is slidably connected to the base. When the upper cover and the base are in a closed state, under the action of the spring body, the hook member is engaged with the lock key. When the lock key is pressed, the hook member is disengaged from the lock key.

[0014] In a specific embodiment, the upper cover is connected to the base through a connecting shaft. A torsion spring is sleeved on the connecting shaft. One end of the torsion spring is connected to the base, and the other end is connected to the upper cover. When the lock key is pressed, the hook member is disengaged from the lock key, and under the action of the torsion spring, the upper cover automatically opens.

[0015] The beneficial effects of the diode performance test fixture with convertible polarity of the present invention compared with the prior art are as follows: The base is provided with a receiving cavity for receiving the turntable. The receiving cavity is provided with a rotating shaft connected to the base, and the turntable is connected to the rotating shaft so that the turntable rotates around the rotating shaft. The turntable is provided with an installation position for placing the diode, enabling the diode to perform polarity conversion without being taken out, avoiding the problem of the diode being placed with the wrong polarity and needing to be taken out and put in again, reducing the time consumption, and effectively improving the test efficiency and error tolerance rate.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 Schematic diagram when the diode performance testing fixture with convertible polarity provided by the present utility model is in the closed state;

[0019] Figure 2 Cross-sectional schematic diagram of the diode performance testing fixture with convertible polarity provided by the present utility model;

[0020] Figure 3 Schematic diagram when the diode performance testing fixture with convertible polarity provided by the present utility model is in the open state;

[0021] Figure 4 Exploded schematic diagram of the diode performance testing with convertible polarity provided by the present utility model Figure 1 ;

[0022] Figure 5 Exploded schematic diagram of the diode performance testing with convertible polarity provided by the present utility model Figure 2 ;

[0023] Figure 6 Schematic diagram of the back of the turntable provided by the present utility model. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] In addition, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0028] In the present utility model, unless otherwise clearly defined and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first1 feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0030] In the description of this specification, the descriptions with reference to the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0031] See Figures 1 to 6In the specific embodiments shown, the present utility model discloses a diode performance test fixture with convertible polarity, comprising: a base 10 and a turntable 20. The base 10 is provided with a receiving cavity for receiving the turntable 20. The receiving cavity is provided with a rotating shaft 30 connected to the base 10. The turntable 20 is connected to the rotating shaft 30 so that the turntable 20 rotates around the rotating shaft 30. The turntable 20 is provided with a mounting position 21 for placing the diode.

[0032] Specifically, the diode is installed using a positioning member 80, and then the positioning member 80 is placed in the mounting position 21 to form a fixation, facilitating subsequent performance testing of the diode. This test fixture enables the diode to perform polarity conversion without being taken out, avoiding the problem of the diode's polarity being reversed and needing to be taken out and put in again, reducing the time consumption, and effectively improving the test efficiency and fault tolerance rate. In addition, this test fixture can also be applied to various application scenarios that require frequent switching of the diode's polarity, such as the fields of electronic component manufacturing, production, testing, and maintenance.

[0033] Preferably, the four corners of the mounting position 21 are provided with chamfers so that when the positioning member 80 is placed in the mounting position 21, it is not easy to shake and shift.

[0034] In an embodiment, as shown in Figures 3 to 6 shown, an arc-shaped track 22 is provided at the bottom of the turntable 20, and a stop projection 11 is provided on one side of the receiving cavity. The arc-shaped track 22 is slidably connected to the stop projection 11; when the turntable 20 is in the initial position, one end of the arc-shaped track 22 contacts the stop projection 11. When the turntable 20 is rotated until the other end of the arc-shaped track 22 contacts the stop projection 11, the turntable 20 rotates 180 degrees to convert the polarity of the diode.

[0035] Specifically, an arc-shaped track 22 is provided at the bottom of the turntable 20, and this track is slidably connected to the stop projection 11 on one side of the receiving cavity. This design ensures that the turntable 20 can rotate along a specific path (i.e., the path of the arc-shaped track 22) when rotating, and its rotation range is limited. The stop projection 11 serves as the starting and ending contact points at both ends of the arc-shaped track 22, playing a role in positioning and limiting the rotation range, that is, the rotation range of the turntable 20 is 180 degrees. In addition, when the turntable 20 is in the initial position, one end of the arc-shaped track 22 contacts the stop projection 11. As the turntable 20 rotates, the arc-shaped track 22 slides along the stop projection 11 until the other end contacts the stop projection 11. During this process, the rotation angle of the turntable 20 is precisely controlled to 180 degrees. This precise control is crucial for equipment or systems that require specific angle conversion or operation. In addition, during the rotation of the turntable 20, its movement is associated with the polarity conversion of the diode. When the turntable 20 rotates 180 degrees, the polarity conversion of the diode is completed.

[0036] In one embodiment, a positioning component 40 is further provided at a position of the accommodating cavity near the stopping protrusion 11. First grooves 23 and second grooves 24 corresponding to the positioning component 40 are provided on both sides of the turntable 20. When the turntable 20 is in the initial position, the first groove 23 is connected to the positioning component 40. When the turntable 20 rotates 180 degrees, the second groove 24 is connected to the positioning component 40.

[0037] Specifically, a positioning component 40 is provided at a position of the accommodating cavity near the stopping protrusion 11, and first grooves 23 and second grooves 24 corresponding to the positioning component 40 are provided on both sides of the turntable 20. This design ensures the precise positioning of the turntable 20 during rotation. When the turntable 20 is in the initial position, the first groove 23 is connected to the positioning component 40 to achieve the fixation of the initial position. When the turntable 20 rotates 180 degrees, the second groove 24 is connected to the positioning component 40 to achieve the fixation of the position after rotating 180 degrees. This design ensures the stability of the turntable 20 during the test and prevents test errors caused by inaccurate positions of the turntable 20. In addition, when the first groove 23 or the second groove 24 is connected to the positioning component 40, a sense of being in place will be generated. This sense of being in place may be transmitted to the operator through mechanical contact, sound, or touch, etc., enabling the operator to clearly know that the turntable 20 has reached the predetermined position, thereby improving the accuracy and convenience of the operation. In addition, since the turntable 20 can be accurately fixed and positioned at both the initial position and the 180-degree position, the test efficiency and repeatability can be greatly improved. The operator does not need to manually adjust the position of the turntable 20 before each test. Simply rotate the turntable 20 and wait for the sense of being in place, thus saving test time and improving the reliability of the test results. In addition, through precise positioning and fixation, this design also enhances the safety of the equipment. During the test, the turntable 20 will not easily move or shake due to external factors, thereby avoiding equipment damage or test accidents caused by inaccurate positions of the turntable 20.

[0038] In one embodiment, the positioning component 40 includes a ball 41, a spring member 42, and a screw member 43. The base 10 is provided with a mounting hole communicating with the accommodating cavity. The screw member 43 is located at the bottom of the base 10 and connected to the mounting hole. The spring member 42 is installed in the mounting hole and one end abuts against the screw member 43. The ball 41 abuts against the spring member 42 and a partial area of the ball 41 protrudes from the mounting hole. The ball 41 is engaged with the first groove 23 or the second groove 24.

[0039] Specifically, the in-place component 40 is composed of a ball 41, a spring member 42, and a screw member 43. This combined design allows the ball 41 to elastically expand and contract under the action of the spring member 42, while the screw member 43 provides a basis for installation and adjustment. Additionally, the base 10 is provided with mounting holes communicating with the receiving cavity. The screw member 43 is located at the bottom of the base 10 and connected to the mounting holes, which ensures the stable installation of the in-place component 40. The spring member 42 is installed in the mounting holes, with one end abutting against the screw member 43 and the other end abutting against the ball 41. This installation method enables a part of the ball 41 to protrude from the mounting holes when no external force is applied, facilitating the cooperation with the grooves on the turntable 20. Additionally, the two sides of the turntable 20 are provided with a first groove 23 and a second groove 24 corresponding to the in-place component 40. When the turntable 20 is in the initial position or rotated to the 180-degree position, the ball 41 will cooperate with the first groove 23 and the second groove 24 respectively. This cooperation relationship ensures the precise fixation of the turntable 20 at specific positions. Additionally, when the ball 41 cooperates with the first groove 23 or the second groove 24, due to the elastic force of the spring member 42, an obvious in-place feeling will be given to the operator. This in-place feeling can help the operator determine whether the turntable 20 has reached the predetermined position, improving the accuracy and convenience of the operation. Additionally, by adjusting the position of the screw member 43 in the mounting holes, the pre-tightening force of the spring member 42 can be changed, thereby adjusting the height of the ball 41 protruding from the mounting holes. This adjustment function enables the in-place component 40 to adapt to grooves of different sizes or shapes, improving its applicability and flexibility.

[0040] In one embodiment, the stop protrusion 11 and the in-place component 40 are in the same horizontal position.

[0041] Specifically, when the turntable 20 rotates to the initial position or the 180-degree position, the first groove 23 or the second groove 24 thereon will cooperate with the ball 41 of the in-place component 40 to achieve precise positioning. At the same time, the stop protrusion 11 will serve as an additional support and limit point, jointly ensuring the stability of the turntable 20 at specific positions with the in-place component 40. Additionally, due to the precise cooperation of the stop protrusion 11 and the in-place component 40 in the same horizontal position, the turntable 20 can accurately rotate to the predetermined position each time and stably connect with other parts of the test fixture, which greatly improves the repeatability and reliability of the test, making the test results more accurate and reliable.

[0042] In one embodiment, the rotating shaft 30 includes a gear end and a fixed end. The gear end is connected to the base 10, and the fixed end is connected to the turntable 20 by screws.

[0043] Specifically, a connection hole is provided at the center position of the base 10. An annular tooth is provided at the lower end of the connection hole. The rotating shaft 30 is installed in the connection hole, and the gear end forms an interference fit with the annular tooth and is riveted on the base 10 to form a fixed structure, enabling the rotating shaft 30 to rotate around the rotating shaft 30. In addition, the fixed end extends into the turntable 20 and is then limited by screw connection to prevent the turntable 20 from detaching from the rotating shaft 30, thereby enabling the turntable 20 to rotate back and forth by 180 degrees.

[0044] In one embodiment, a damping washer 50 is also sleeved on the fixed end, and an annular groove 25 corresponding to the damping washer 50 is provided at the bottom of the turntable 20.

[0045] Specifically, the material and design of the damping washer 50 endow it with certain damping characteristics, that is, it can resist motion or deformation and consume energy. When the turntable 20 rotates, the damping washer 50 will provide a certain degree of resistance, making the turntable 20 have a damping feeling during the rotation process. In addition, the existence of the damping feeling makes the rotation of the turntable 20 more stable, avoiding sudden acceleration or deceleration due to inertia. This stable rotation is crucial for tests or operations that require precise control, which can improve the accuracy and repeatability of operations. In addition, the damping effect of the damping washer 50 can also reduce the vibration and noise generated during the rotation of the turntable 20. In addition, the existence of the damping feeling can also bring a better operation experience to the operator. The operator can more intuitively feel the state and position of the rotation of the turntable 20, thereby more accurately controlling the operation of the turntable 20. This improvement in the operation experience can improve the work efficiency and job satisfaction of the operator. In addition, by selecting the appropriate material and design of the damping washer 50, the magnitude and characteristics of the damping feeling can be adjusted to meet different application requirements. For example: in occasions that require more precise control, a damping washer 50 with a stronger damping feeling can be selected, while in occasions that require rapid rotation, a damping washer 50 with a weaker damping feeling can be selected.

[0046] In one embodiment, a handle 26 is further provided on one side of the turntable 20 at the installation position 21.

[0047] Specifically, the handle 26 provides an intuitive and convenient control point for the operator. The operator can easily rotate the turntable 20 by holding the handle 26 without using additional tools or equipment, simplifying the operation process.

[0048] In one embodiment, the base 10 is also movably connected to an upper cover 60. The upper cover 60 is provided with a hook member 61, and the base 10 is provided with a lock assembly 70 corresponding to the hook member 61. The lock assembly 70 includes a lock key 71 and a spring body 72. One end of the spring body 72 is fixed to the base 10, and the other end abuts against the lock key 71. The lock key 71 is slidably connected to the base 10. When the upper cover 60 and the base 10 are in a closed state, under the action of the spring body 72, the hook member 61 is engaged with the lock key 71. When the lock key 71 is pressed, the hook member 61 is disengaged from the lock key 71.

[0049] Specifically, one end of the upper cover 60 is hinged to the base 10, and the other end is provided with a hook member 61. The base 10 is provided with an installation cavity corresponding to the position of the hook member 61. The spring body 72 is located in the installation cavity. The top of the installation cavity is also provided with a cover plate 73, and the cover plate 73 is provided with a notch to facilitate the hook member 61 to pass through. When the upper cover 60 and the base 10 are in a closed state, the hook member 61 is engaged with the lock key 71, and at this time the spring body 72 is in an extended state. When the lock key 71 is pressed, the lock key 71 moves towards the hinged end of the upper cover 60, and the hook member 61 is disengaged from the lock key 71, and the upper cover 60 can be opened. At this time, the spring body 72 is in a compressed state.

[0050] Among them, when the upper cover 60 and the base 10 are in a closed state, the hook member 61 is engaged with the lock key 71, realizing the tight fixation of the base 10 and the upper cover 60. This fixation method helps to protect the internal components and prevent them from being affected by the external environment, such as dust, moisture, etc. In addition, by pressing the lock key 71, the hook member 61 is disengaged from the lock key 71, so that the upper cover 60 can be easily opened. This design simplifies the operation process. The operator does not need to use additional tools and only needs to press gently to unlock and open the cover. In addition, the design of the lock assembly 70 ensures that the upper cover 60 will not be easily opened in the locked state, improving the safety.

[0051] In one embodiment, the upper cover 60 is connected to the base 10 through a connecting shaft, and a torsion spring 62 is sleeved on the connecting shaft. One end of the torsion spring 62 is connected to the base 10, and the other end is connected to the upper cover 60. When the lock key 71 is pressed, the hook member 61 is disengaged from the lock key 71, and under the action of the torsion spring 62, the upper cover 60 automatically opens.

[0052] Specifically, through the torsion spring 62 sleeved on the connecting shaft, when the locking key 71 is pressed to disengage the hook member 61 from the locking key 71, the torsion spring 62 will automatically push the upper cover 60 open by using the potential energy stored in it. This design provides a convenient automatic opening function, enabling the upper cover 60 to be fully opened without manual operation by the operator, thus improving the operation convenience. Additionally, the torsion spring 62 also plays a key role in keeping the upper cover 60 in the closed state. It can ensure the stability of the upper cover 60 when it is not unlocked and prevent it from being easily opened by generating a reverse torque. Moreover, the automatic opening function of the torsion spring 62 provides a smoother and more convenient operation experience for the operator. The operator only needs to simply press the locking key 71 to achieve the automatic opening of the upper cover 60 without additional operations, enhancing the operator's satisfaction.

[0053] In an embodiment, avoidance holes 63 corresponding to the handle 26 are provided on both sides of the upper cover 60. When the upper cover 60 and the base 10 are in the closed state, the handle 26 cooperates with the avoidance holes 63. By providing the avoidance holes 63 on the upper cover 60, the design of the entire device is more reasonable. This design not only considers the convenience of use for the operator but also takes into account the compactness and aesthetics of the device structure.

[0054] The above embodiments are the preferred implementation solutions of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A fixture for testing the performance of a diode with convertible polarity, characterized in that, Comprising: A base and a turntable. The base is provided with a receiving cavity for receiving the turntable. The receiving cavity is provided with a rotating shaft connected to the base, and the turntable is connected to the rotating shaft so that the turntable rotates around the rotating shaft. The turntable is provided with a mounting position for placing a diode.

2. The diode performance testing fixture with convertible polarity according to claim 1, wherein An arc-shaped track is provided at the bottom of the turntable, and a stop protrusion is provided on one side of the receiving cavity. The arc-shaped track is slidably connected to the stop protrusion; when the turntable is in the initial position, one end of the arc-shaped track contacts the stop protrusion. When the turntable is rotated until the other end of the arc-shaped track contacts the stop protrusion, the turntable rotates 180 degrees to change the polarity of the diode.

3. The diode performance test fixture with convertible polarity according to claim 2, characterized in that, An in-place component is further provided at a position of the receiving cavity near the stop protrusion. First and second grooves corresponding to the in-place component are provided on both sides of the turntable; when the turntable is in the initial position, the first groove is connected to the in-place component, and when the turntable rotates 180 degrees, the second groove is connected to the in-place component.

4. The diode performance test fixture with convertible polarity according to claim 3, characterized in that, The in-place component includes a ball, a spring member, and a screw member. The base is provided with a mounting hole communicating with the receiving cavity. The screw member is located at the bottom of the base and connected to the mounting hole. The spring member is installed in the mounting hole and one end abuts against the screw member. The ball abuts against the spring member and a part of the ball protrudes from the mounting hole. The ball is engaged with the first groove or the second groove.

5. The diode performance test fixture with convertible polarity according to claim 3, characterized in that, The stop protrusion and the in-place component are in the same horizontal position.

6. The diode performance test fixture with convertible polarity according to claim 1, characterized in that, The rotating shaft includes a gear end and a fixed end. The gear end is connected to the base, and the fixed end is connected to the turntable by screws.

7. The diode performance test fixture with convertible polarity according to claim 6, characterized in that, A damping washer is further sleeved on the fixed end, and an annular groove corresponding to the damping washer is provided at the bottom of the turntable.

8. The diode performance testing fixture with convertible polarity according to claim 1, characterized in that, A handle is further provided on one side of the turntable at the mounting position.

9. The diode performance test fixture with convertible polarity according to claim 1, characterized in that The base is also movably connected with an upper cover. The upper cover is provided with a hook member, and the base is provided with a lock assembly corresponding to the hook member. The lock assembly includes a lock key and a spring body. One end of the spring body is fixed to the base, and the other end abuts against the lock key. The lock key is slidably connected to the base; when the upper cover and the base are in a closed state, under the action of the spring body, the hook member is engaged with the lock key, and when the lock key is pressed, the hook member is disengaged from the lock key.

10. The diode performance test fixture with convertible polarity according to claim 9, characterized in that, The upper cover is connected to the base through a connecting shaft. A torsion spring is sleeved on the connecting shaft. One end of the torsion spring is connected to the base, and the other end is connected to the upper cover. When the lock key is pressed, the hook member is disengaged from the lock key, and under the action of the torsion spring, the upper cover automatically opens.

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