Magnetic attraction buffering mechanism and testing device

Abstract

The utility model discloses a kind of magnetic attraction buffering mechanism and testing device, and magnetic attraction buffering mechanism includes: fixed seat;Sliding seat, with fixed seat sliding cooperation;Elastic member, be located in fixed seat, and be connected with sliding seat, to exert elastic force to sliding seat;Magnetic attraction assembly, including first magnet and second magnet, first magnet is located in fixed seat, second magnet is located in sliding seat, and it is opposite with first magnet, there is magnetic attraction between first magnet and second magnet, magnetic attraction can cooperate elastic force and buffer measured interface jointly.By first magnet and second magnet opposite and form magnetic attraction, magnetic attraction can provide sufficient resistance when measured interface inserts, to make up the shortage of initial elastic force, so that measured interface can be smoothly inserted test head, and subsequently along with the sliding of sliding seat, buffering force consisting of magnetic attraction and elastic force can always be in suitable interval, effectively reduce the risk of measured interface being hit.

Description

Technical Field

[0001] This utility model relates to the field of electronic testing technology, and in particular to a magnetic suction buffer mechanism and a testing device. Background Technology

[0002] The Vehicle Domain Controller (VDC) is a key component in modern automotive electronic architecture. It integrates and manages multiple electronic control units to improve the vehicle's intelligence and automation levels. After manufacturing, the VDC undergoes electronic testing. This involves inserting the interface under test (DUT) on the VDC into relevant testing equipment to verify its reliability. The DUT can be an I / O interface or similar; these interfaces, due to their numerous pins, require high levels of buffering.

[0003] In related technologies, to reduce the risk of damage to the interface under test (DUT) during testing, testing devices typically include a buffer mechanism to cushion the DUT. However, existing buffer mechanisms cannot provide adequate cushioning force. Excessive cushioning force can easily damage the DUT, while insufficient cushioning force can prevent the test head from being inserted, making testing difficult. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a magnetic buffer mechanism and a testing device, which can provide suitable buffering force, reduce the risk of damage to the interface under test, and enable the interface under test to be inserted into the test head for smooth testing.

[0005] In a first aspect, this utility model provides a magnetic suction buffer mechanism, which includes: a fixed base; a sliding base that slides with the fixed base and is used to install a test head for insertion into the interface to be tested; an elastic element disposed on the fixed base and connected to the sliding base to apply an elastic force to the sliding base; and a magnetic suction assembly including a first magnet and a second magnet, wherein the first magnet is disposed on the fixed base, the second magnet is disposed on the sliding base and opposite to the first magnet, and there is a magnetic attraction between the first magnet and the second magnet, the magnetic attraction being able to work in conjunction with the elastic force to buffer the interface to be tested.

[0006] The magnetic buffer mechanism provided in the first aspect of this utility model has at least the following beneficial effects: By setting up a sliding engagement between the sliding seat and the fixed seat, the sliding seat can drive the test head to slide relative to the fixed seat, providing a buffer stroke for the test head. At the same time, an elastic element is set on the fixed seat and connected to the sliding seat. The first magnet of the magnetic attraction assembly is set on the fixed seat, and the second magnet of the magnetic attraction assembly is set on the sliding seat. The first magnet and the second magnet are opposite each other and form a magnetic attraction force. The magnetic attraction force can provide sufficient resistance when the interface under test is inserted to compensate for the insufficient initial elastic force, so that the interface under test can be smoothly inserted into the test head. As the sliding seat slides, the distance between the first magnet and the second magnet increases, the magnetic attraction force decreases, the deformation of the elastic element increases, and the elastic force increases. This ensures that the buffer force composed of the magnetic attraction force and the elastic force can always be within a suitable range during the test, effectively reducing the risk of the interface under test being damaged.

[0007] In one embodiment of this implementation, the fixed seat includes a limiting block, which abuts against the side of the sliding seat opposite to the elastic member, and the first magnet is disposed on the limiting block.

[0008] In one embodiment of this implementation, the limiting block has a mounting hole, and the first magnet is mounted in the mounting hole.

[0009] In one embodiment of this implementation, the mounting hole has a first opening and a second opening disposed opposite to each other, the second opening being located on the side closer to the second magnet, a limiting protrusion is formed on the inner wall of the mounting hole, a limiting boss is formed on the outer periphery of the first magnet, the first magnet can extend into the mounting hole from the first opening, and the limiting boss abuts against the limiting boss.

[0010] In one embodiment of this implementation, the sliding seat has a mounting groove opposite to the mounting hole, and the second magnet is mounted in the mounting groove.

[0011] In one embodiment of this implementation, the fixed base includes a fixed block and a mounting block. The fixed block is slidably engaged with the sliding base, and one end is connected to the mounting block and the other end is connected to the limiting block. The elastic element is disposed between the mounting block and the sliding base.

[0012] In one embodiment of this implementation, the mounting block and the sliding seat are respectively provided with receiving grooves, and the elastic element is constructed as a spring, with both ends respectively accommodated in the corresponding receiving grooves.

[0013] In one embodiment of this implementation, one of the receiving slots is provided with a limiting rod, and a spring is sleeved on the limiting rod.

[0014] In one embodiment of this implementation, one of the fixed base and the sliding base is provided with a slide rail, and the other is provided with a slider that slides in cooperation with the slide rail.

[0015] In an embodiment of this embodiment, there are two sets of magnetic attraction assemblies, and projections of the two sets of magnetic attraction assemblies are located on two sides of a projection of the sliding rail on a plane perpendicular to an extending direction of the sliding rail.

[0016] In an embodiment of this embodiment, distances from projections of the two sets of magnetic attraction assemblies to a projection of the sliding rail are equal on a plane perpendicular to the extending direction of the sliding rail.

[0017] In an embodiment of this embodiment, when the sliding seat is at an initial position, a deformation amount of the elastic member is minimum, and a resultant force of the magnetic attraction force and the elastic force ranges from 40N to 50N; when the sliding seat is at an extreme position, the deformation amount of the elastic member is maximum, and the resultant force of the magnetic attraction force and the elastic force is less than 55N.

[0018] In an embodiment of this embodiment, a direction of the magnetic attraction force, a direction of the elastic force, and a sliding direction of the sliding seat relative to the fixed seat are pairwise parallel.

[0019] In an embodiment of this embodiment, the magnetic attraction buffer mechanism includes a protective cover disposed on the sliding seat and surrounding the elastic member. The protective cover is in a C-shape, which can prevent impurities such as dust from interfering with the elastic member, thereby protecting the elastic member and prolonging the service life of the elastic member.

[0020] In a second aspect, an embodiment of the present utility model provides a testing apparatus, which includes a testing head and the magnetic attraction buffer mechanism according to any embodiment of the first aspect. The testing head is mounted on the sliding seat of the magnetic attraction buffer mechanism and configured for an interface to be tested to insert thereinto.

[0021] The testing apparatus provided by the embodiment of the second aspect of the present utility model has at least the following beneficial effects: By adding the magnetic attraction buffer mechanism provided by the embodiment of the present utility model into the testing apparatus, reasonable buffering can be performed on the interface to be tested, the testing reliability is improved, and the risk of damage to the interface to be tested is reduced.

[0022] Additional aspects and advantages of the present utility model will be partially set forth in the following description, and will become apparent from the following description, or be learned through practice of the present utility model. Description of Drawings

[0023] The present utility model is further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 is a structural schematic diagram of the magnetic attraction buffer mechanism in an initial state according to an embodiment of the present utility model; Figure 2 is Figure 1 A schematic diagram of the magnetic buffer mechanism behind the hidden protective cover; Figure 3 yes Figure 2 A schematic diagram of the magnetic suction buffer mechanism in the test state; Figure 4 yes Figure 2 A schematic diagram of the magnetic suction buffer mechanism from another perspective; Figure 5 yes Figure 2 A schematic diagram of the structure of the fixed base and the first magnet in the magnetic suction buffer mechanism; Figure 6 yes Figure 5 A schematic diagram of the structure of the fixing base and the first magnet in the disassembled state; Figure 7 yes Figure 2 A schematic diagram of the structure of the sliding seat and the second magnet in the magnetic suction buffer mechanism; Figure 8 yes Figure 7 A schematic diagram of the sliding seat and the second magnet in their decomposed state.

[0024] Figure label: Magnetic buffer mechanism 100; Fixed base 10; limiting block 11; mounting hole 1101; limiting protrusion 1104; fixed block 12; mounting block 13; receiving groove 1301; limiting rod 1302; slide rail 14; Sliding seat 20; mounting slot 201; slider 21; connecting slot 202; Elastic element 30; First magnet 41; limiting boss 411; second magnet 42; Protective shield 50. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] In related technologies, buffer mechanisms use the elastic force generated by spring deformation to cushion the interface under test. When the interface under test is first inserted, the initial deformation of the spring is insufficient, resulting in too small an elastic force, making it difficult to insert the test head smoothly and hindering testing. If, to address the problem of insufficient resistance preventing insertion, the spring stiffness is increased or a larger initial deformation is set to enhance the elastic force, the interface under test can be inserted smoothly. However, during the buffering process, as the spring deformation increases, the elastic force surges, exceeding the limit that the interface under test can withstand, potentially damaging it. Conversely, if the spring stiffness is reduced or a smaller initial deformation is set to decrease the elastic force during testing, insufficient initial elastic force will result in difficulty inserting the interface under test. Therefore, existing buffer mechanisms struggle to simultaneously address both the insertion and damage issues of the interface under test.

[0031] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the magnetic suction buffer mechanism 100 in its initial state according to one embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the magnetic buffer mechanism 100 after the protective cover 50 is concealed; Figure 3 yes Figure 2is a schematic structural diagram of the magnetic suction buffer mechanism 100 in a test state. An embodiment of the present utility model provides a magnetic suction buffer mechanism 100. The magnetic suction buffer mechanism 100 comprises a fixed base 10, a sliding base 20, an elastic member 30 and a magnetic suction assembly. The sliding base 20 is in sliding fit with the fixed base 10 and is used for mounting a test head into which an interface to be tested is inserted. The elastic member 30 is disposed on the fixed base 10 and connected to the sliding base 20 to apply an elastic force to the sliding base 20. The magnetic suction assembly comprises a first magnet 41 and a second magnet 42. The first magnet 41 is disposed on the fixed base 10, the second magnet 42 is disposed on the sliding base 20 and opposite to the first magnet 41, and there is a magnetic attraction force between the first magnet 41 and the second magnet 42. The magnetic attraction force can cooperate with the elastic force to jointly buffer the interface to be tested.

[0032] Specifically, the sliding base 20 is provided with a connecting groove 202, and the connecting groove 202 is used for mounting the test head. One side of the test head is for insertion of the interface to be tested, and the other side of the test head is for connection with a signal cable, so that a test signal is sent to the interface to be tested through the test head, or a signal sent by the interface to be tested is received.

[0033] Specifically, the interface to be tested can be optionally an interface on equipment such as a vehicle-mounted domain controller and a server. In some embodiments, the interface to be tested is an I / O interface with a large number of pins, which has high requirements for buffering.

[0034] Specifically, the elastic member 30 can be optionally a device capable of elastic deformation such as a spring, a reed or a leaf spring. When the elastic member 30 is a spring, it can provide the elastic force required for buffering through compression, and can also provide the elastic force required for buffering through stretching.

[0035] Specifically, the first magnet 41 and the second magnet 42 can be optionally natural magnets such as magnetite.

[0036] Specifically, in order to achieve buffering, the direction of the magnetic attraction force and the direction of the elastic force are both opposite or substantially opposite to the insertion direction of the interface to be tested.

[0037] Specifically, the magnetic suction buffer mechanism 100 comprises a protective cover 50. The protective cover 50 is disposed on the sliding base 20 and arranged around the elastic member 30. The protective cover 50 is in a "匚"-shape, which can prevent impurities such as dust from interfering with the elastic member 30, thereby protecting the elastic member 30 and prolonging the service life of the elastic member 30.

[0038] By setting the sliding seat 20 to slide relative to the fixed seat 10, the sliding seat 20 can drive the test head to slide relative to the fixed seat 10, providing a buffer stroke for the test head. At the same time, an elastic element 30 is set on the fixed seat 10, and the elastic element 30 is connected to the sliding seat 20. The first magnet 41 of the magnetic attraction assembly is set on the fixed seat 10, and the second magnet 42 of the magnetic attraction assembly is set on the sliding seat 20. The first magnet 41 and the second magnet 42 are opposite each other and form a magnetic attraction force. The magnetic attraction force can provide sufficient resistance when the interface under test is inserted to compensate for the lack of initial elastic force, so that the interface under test can be smoothly inserted into the test head. As the sliding seat 20 slides, the distance between the first magnet 41 and the second magnet 42 increases, the magnetic attraction force decreases, the deformation of the elastic element 30 increases, and the elastic force increases. This ensures that the buffer force composed of magnetic attraction force and elastic force can always be in a suitable range during the test, effectively reducing the risk of the interface under test being damaged.

[0039] In one embodiment of this implementation, in order to enable the magnetic attraction force to better cooperate with the elastic force to achieve buffering and improve the buffering effect, the direction of the magnetic attraction force, the direction of the elastic force, and the direction of the sliding seat 20 relative to the fixed seat 10 are parallel to each other.

[0040] In one embodiment of this implementation, please refer to Figure 2 and Figure 3 The fixed base 10 includes a limiting block 11, which abuts against the side of the sliding base 20 opposite to the elastic member 30. A first magnet 41 is disposed on the limiting block 11. With this configuration, the sliding base 20 can be limited by the limiting block 11, and the sliding base 20 can be held in its initial position by the limiting block 11. At the same time, the first magnet 41 is mounted on the limiting block 11 to apply a buffered magnetic attraction force to the sliding base 20.

[0041] Specifically, the second magnet 42 is located on the side of the sliding seat 20 facing away from the elastic member 30 and is opposite to the first magnet 41.

[0042] In one embodiment of this implementation, please refer to Figure 5 and Figure 6 , Figure 5 yes Figure 2 A schematic diagram of the structure of the fixed base 10 and the first magnet 41 in the magnetic suction buffer mechanism 100; Figure 6 yes Figure 5 The diagram shows the structure of the fixing base 10 and the first magnet 41 in their disassembled state. In order to realize the installation of the first magnet 41 on the limiting block 11, the limiting block 11 is provided with a mounting hole 1101, and the first magnet 41 is installed in the mounting hole 1101.

[0043] In this embodiment, to reduce the installation difficulty of the first magnet 41, the mounting hole 1101 has a first opening and a second opening arranged opposite to each other. The second opening is located on the side closer to the second magnet 42. A limiting protrusion 1104 is formed on the inner wall of the mounting hole 1101, and a limiting boss 411 is formed on the outer periphery of the first magnet 41. The first magnet 41 can extend into the mounting hole 1101 through the first opening, and the limiting boss 411 abuts against the limiting boss 411. With this arrangement, the first magnet 41 can be held in the mounting hole 1101 by magnetic attraction, making installation easier and more convenient.

[0044] In this embodiment, please refer to Figure 7 and Figure 8 , Figure 7 yes Figure 2 A schematic diagram of the structure of the sliding seat 20 and the second magnet 42 in the magnetic suction buffer mechanism 100; Figure 8 yes Figure 7 The diagram shows the structure of the sliding seat 20 and the second magnet 42 in their disassembled state. To allow the second magnet 42 to be mounted on the sliding seat 20, the sliding seat 20 has a mounting groove 201 opposite to the mounting hole 1101, and the second magnet 42 is mounted in the mounting groove 201. Specifically, the mounting groove 201 is opposite to the second opening of the mounting hole 1101, so that the first magnet 41 and the second magnet 42 can be aligned.

[0045] Specifically, the second magnet 42 can be fixed in the mounting groove 201 by interference fit or by glue.

[0046] In one embodiment of this implementation, please refer to Figure 5 and Figure 6 The fixed base 10 includes a fixed block 12 and a mounting block 13. The fixed block 12 is slidably engaged with the sliding base 20, and one end is connected to the mounting block 13, while the other end is connected to the limiting block 11. The elastic element 30 is disposed between the mounting block 13 and the sliding base 20. This arrangement allows the magnetic attraction force and the elastic force to be directed to the same side, thus achieving a buffering effect.

[0047] Specifically, the sliding seat 20 is located between the mounting block 13 and the limiting block 11. Under the action of the elastic element 30, the sliding seat 20 can slide back to its initial point along the fixed seat 10 after the test. At this time, the sliding seat 20 abuts against the limiting block 11 and is in the initial position, at which point the deformation of the elastic element 30 is minimal. During the test, the interface under test will drive the sliding seat 20 to slide along the fixed block 12 toward the mounting block 13 and compress the elastic element 30. When the sliding seat 20 abuts against the mounting block 13, the sliding seat 20 is in its extreme position, at which point the deformation of the elastic element 30 is maximum.

[0048] Specifically, in order to provide sufficient buffer travel, when the slide seat 20 is in the initial position, the distance between the slide seat 20 and the mounting block 13 is greater than 19mm.

[0049] In one embodiment of this implementation, please refer to Figure 2 and Figure 4 , Figure 4 yes Figure 2 A schematic diagram of the magnetic suction buffer mechanism 100 from another perspective. In order to realize the installation of the elastic element 30 and provide a stable elastic force, the mounting block 13 and the sliding seat 20 are respectively provided with receiving grooves 1301. The elastic element 30 is constructed as a spring, and its two ends are respectively accommodated in the corresponding receiving grooves 1301.

[0050] In this embodiment, in order to further improve the stability of the elastic force, a limiting rod 1302 is provided in the receiving groove 1301 on the sliding seat 20, and the spring is sleeved on the limiting rod 1302 to limit the radial deformation of the spring.

[0051] In one embodiment of this implementation, please refer to Figure 4 In order to achieve relative sliding between the fixed seat 10 and the sliding seat 20, one of the fixed seat 10 and the sliding seat 20 is provided with a slide rail 14, and the other is provided with a slider 21 that slides with the slide rail 14.

[0052] Specifically, in this embodiment, the slide rail 14 is located on the top side of the fixed block 12, and the slider 21 is located on the bottom side of the sliding seat 20.

[0053] In one embodiment of this implementation, please refer to Figure 2 and Figure 3 The magnetic attraction components are arranged in two sets. On a plane perpendicular to the extension direction of the slide rail 14, the projections of the two sets of magnetic attraction components are located on both sides of the projection of the slide rail 14. With this arrangement, the magnetic attraction force provided by the two sets of magnetic attraction components can be adequately buffered, without generating torque on the sliding seat 20, thus avoiding affecting the sliding action of the sliding seat 20 and making the sliding seat 20 slide smoothly and without jamming relative to the fixed seat 10.

[0054] Specifically, on a plane perpendicular to the extension direction of the slide rail 14, the projections of the two sets of magnetic components are at the same distance from the projection of the slide rail 14, so as to further reduce the impact on the sliding action of the slide seat 20.

[0055] In one embodiment of this implementation, please refer to Figure 2 and Figure 3When the sliding seat 20 is in the initial position, the deformation of the elastic element 30 is minimal, and the resultant force of the magnetic attraction and elastic force ranges from 40N to 50N. When the sliding seat 20 is in the extreme position, the deformation of the elastic element 30 is maximum, and the resultant force of the magnetic attraction and elastic force is less than 55N. This design, on the one hand, provides greater resistance when the interface under test is inserted, facilitating smooth insertion of the test head; on the other hand, even when the interface under test is inserted to its deepest position, it will not experience resistance exceeding the limit, thereby reducing the risk of damage.

[0056] In this embodiment, both the first magnet 41 and the second magnet 42 are magnets, and the magnitude of the magnetic attraction force is adjusted by adjusting the parameters of the magnets.

[0057] This utility model provides a testing device; please refer to [link / reference]. Figures 1 to 3 The testing device includes a test head (not shown) and a magnetic buffer mechanism 100. The test head is mounted on a sliding seat 20 of the magnetic buffer mechanism 100 and is used for inserting the interface under test. Specifically, the testing device can be used to perform electrical tests on devices such as vehicle domain controllers and servers. By adding the magnetic buffer mechanism 100 provided in this embodiment to the testing device, the interface under test can be reasonably buffered, improving the reliability of the test and reducing the risk of damage to the interface under test.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A magnetic suction buffer mechanism, characterized in that, include: Fixed base; A sliding base, which slides in conjunction with the fixed base, is used to mount a test head for insertion into the interface under test; An elastic element is disposed on the fixed seat and connected to the sliding seat to apply an elastic force to the sliding seat; The magnetic attraction component includes a first magnet and a second magnet. The first magnet is disposed on the fixed base, and the second magnet is disposed on the sliding base and opposite to the first magnet. There is a magnetic attraction between the first magnet and the second magnet. The magnetic attraction can work in conjunction with the elastic force to buffer the interface under test.

2. The magnetic suction buffer mechanism according to claim 1, characterized in that, The fixed seat includes a limiting block, which abuts against the side of the sliding seat opposite to the elastic member, and the first magnet is disposed on the limiting block.

3. The magnetic suction buffer mechanism according to claim 2, characterized in that, The limiting block has a mounting hole, and the first magnet is installed in the mounting hole.

4. The magnetic suction buffer mechanism according to claim 2, characterized in that, The fixed base includes a fixed block and a mounting block. The fixed block is slidably engaged with the sliding base, and one end is connected to the mounting block and the other end is connected to the limiting block. The elastic element is disposed between the mounting block and the sliding base.

5. The magnetic suction buffer mechanism according to claim 4, characterized in that, The mounting block and the sliding seat are respectively provided with receiving grooves, and the elastic element is constructed as a spring, with both ends respectively housed in the corresponding receiving grooves.

6. The magnetic suction buffer mechanism according to claim 1, characterized in that, One of the fixed base and the sliding base is provided with a slide rail, and the other is provided with a slider that slides in cooperation with the slide rail.

7. The magnetic suction buffer mechanism according to claim 6, characterized in that, The number of magnetic assemblies is two sets, and the projections of the two sets of magnetic assemblies are located on both sides of the projection of the slide rail on a plane perpendicular to the extension direction of the slide rail.

8. The magnetic suction buffer mechanism according to claim 1, characterized in that, When the sliding seat is in the initial position, the deformation of the elastic element is minimal, and the resultant force of the magnetic attraction force and the elastic force ranges from 40N to 50N. When the sliding seat is in the extreme position, the deformation of the elastic element is maximal, and the resultant force of the magnetic attraction force and the elastic force is less than 55N.

9. The magnetic suction buffer mechanism according to claim 1, characterized in that, The directions of the magnetic attraction force, the elastic force, and the sliding direction of the sliding seat relative to the fixed seat are all parallel to each other.

10. A testing apparatus, characterized in that, It includes a test head and a magnetic suction buffer mechanism according to any one of claims 1 to 9, wherein the test head is mounted on a sliding seat of the magnetic suction buffer mechanism and is used for insertion of the interface to be tested.

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