A current probe with a replaceable tip and a quick locking structure

Abstract

The present invention relates to the technical field of current probes, and discloses a current probe with a replaceable tip and a quick locking structure, including a needle rod sleeve; a tip rod, the tip rod is slidably connected to the inside of the needle rod sleeve through a tapered block sleeved on the outer surface of its circumference, and an installation component for connecting the needle rod sleeve is arranged on the outer surface of the tip rod. This current probe with a replaceable tip and a quick locking structure can effectively solve the problem in the prior art that the tip of the current probe is usually fixed to the probe body and cannot be disassembled. Once the integrated tip is worn or damaged, it is often necessary to replace the entire current probe, which not only wastes resources but also increases the use cost. In some large-scale electronic manufacturing production lines, frequent current testing operations accelerate the wear rate of the probe tip, and a large number of current probes discarded due to tip wear accumulate, resulting in high production costs.

Description

Technical Field

[0001] The present invention relates to the technical field of current probes, and particularly to a current probe with a replaceable tip and a quick locking structure. Background Art

[0002] A current probe is an electronic test instrument used to measure the current intensity in a circuit without interrupting the circuit continuity. It is widely used in fields such as electronic circuits, power systems, communication systems, industrial control, laboratory research, and electronic device testing. It can be used to monitor the current magnitude and waveform, conduct fault diagnosis, electromagnetic compatibility testing, etc.

[0003] The existing tips of current probes are usually fixed to the probe body and cannot be disassembled. Once the integrated tip is worn or damaged, it often requires replacing the entire current probe, which not only wastes resources but also increases the usage cost. In some large-scale electronic manufacturing production lines, frequent current testing operations accelerate the wear rate of the probe tips, and a large number of current probes discarded due to tip wear accumulate, resulting in high production costs. Summary of the Invention

[0004] Aiming at the above-mentioned drawbacks of the existing technology, the present invention provides a current probe with a replaceable tip and a quick locking structure, which can effectively solve the problems in the existing technology that the tip of the current probe is usually fixed to the probe body and cannot be disassembled. Once the integrated tip is worn or damaged, it often requires replacing the entire current probe, which not only wastes resources but also increases the usage cost. In some large-scale electronic manufacturing production lines, frequent current testing operations accelerate the wear rate of the probe tips, and a large number of current probes discarded due to tip wear accumulate, resulting in high production costs.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] The present invention provides a current probe with a replaceable tip and a quick locking structure, including:

[0007] A needle rod sleeve;

[0008] A tip rod, the tip rod is slidably connected to the inside of the needle rod sleeve through a tapered block sleeved on its circumferential outer surface, and an installation component for connecting the needle rod sleeve is arranged on the outer surface of the tip rod;

[0009] Among them, the installation component includes a connecting rod, the connecting rod is rotatably connected to the circumferential outer surface of the tip rod through a shaft rod arranged inside it, and a torsion spring connected to the inside of the connecting rod is sleeved on the circumferential outer surface of the shaft rod. A ratchet block is fixedly connected to the circumferential inner surface of the needle rod sleeve;

[0010] Among them, a guide member for installing the tip rod is provided at the bottom end of the needle rod sleeve, and a disassembling member for separating the tip rod is provided inside the needle rod sleeve.

[0011] Further, the guide member includes a magnetic block. The upper surface of the magnetic block is fixedly connected to the bottom end of the needle rod sleeve. The upper surface of the connecting rod is magnetically designed to be magnetically connected to the magnetic block. There are four connecting rods and they are circumferentially arrayed around the central axis of the tip rod.

[0012] Further, a vertical groove is opened inside the needle rod sleeve. The bottom of the vertical groove is designed in a flared shape. The vertical groove and the magnetic block are staggeredly distributed around the central axis of the tip rod, and the included angle between the magnetic block and the vertical groove is 45 degrees. A limiting block that fits against the inner wall of the vertical groove is fixedly connected to the circumferential outer surface of the tip rod. An annular groove is opened inside the needle rod sleeve, and the annular groove is communicated with the inside of the vertical groove.

[0013] Further, the needle rod sleeve is connected with an electric contact piece through a spring arranged at the top end of its inner wall. The lower surface of the electric contact piece is in contact with the top end of the tip rod.

[0014] Further, the disassembling member includes a baffle. A moving groove communicated with the inside of the annular groove is opened inside the needle rod sleeve. The outer surface of the baffle fits and slides on the inner wall of the moving groove. A tension spring connected to the outer surface of the baffle is arranged inside the moving groove.

[0015] Further, a receiving cavity for placing the connecting rod is opened on the circumferential outer surface of the tip rod. A limiting groove communicated with the inside of the receiving cavity is opened inside the tip rod. A limiting plate is slidably connected inside the limiting groove.

[0016] Further, an arc-shaped block is fixedly connected to the circumferential inner surface of the needle rod sleeve, and there are four arc-shaped blocks arranged around the central axis of the needle rod sleeve. A contact head is fixedly connected to the bottom end of the tip rod.

[0017] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0018] The present invention is provided with a needle bar sleeve and a needle tip bar, which are designed in a split form. When the contact head wears out or other types of contact heads need to be used, only the entire needle tip bar needs to be separated from the needle bar sleeve and replaced. This design allows only the needle tip bar to be replaced instead of the entire probe, which can save costs. Among them, during the installation of the needle tip bar, through the mutual attraction between the magnetic block and the connecting rod, the upper end of the needle tip bar can be accurately fitted with the lower surface of the needle bar sleeve. Since the magnetic blocks and the connecting rods are in one-to-one correspondence, the initial alignment of the central axis can be completed while the end faces of the needle bar sleeve and the needle tip bar are attracted. During installation, the connecting rod expands outward under the action of the torsion spring. Through the ratchet block fixedly connected inside the needle bar sleeve, it is very easy for the needle tip bar to be installed into the inside of the needle bar sleeve. However, when the connecting rod completely passes through the ratchet block, the needle tip bar can no longer be separated from the needle bar sleeve, and subsequent pressing, rotation, and flipping are required to separate the two. Users can quickly replace the needle tip bars with different characteristics to adapt to various complex test scenarios. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the structures of the needle bar sleeve and the needle tip bar of the embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the sectional structure of the needle bar sleeve of the embodiment of the present invention;

[0023] Figure 4 Exploded view of the needle bar sleeve and the needle tip bar of the embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the sectional structure of the needle tip bar of the embodiment of the present invention;

[0025] Figure 6 Perspective view of the needle bar sleeve of the embodiment of the present invention;

[0026] Figure 7 Another perspective sectional view of the needle bar sleeve of the embodiment of the present invention;

[0027] Figure 8 For the embodiment of the present invention Figure 7 Schematic diagram of the locally enlarged structure at A in

[0028] Figure 9 Schematic cross-sectional structure diagram of the connecting rod, electrical contact piece and conical block in the embodiment of the present invention;

[0029] Figure 10 In the embodiment of the present invention Figure 9 Schematic diagram of the enlarged structure of part B in the figure;

[0030] Figure 11 Schematic structure diagram of the tip rod, guide member and arc-shaped block in the embodiment of the present invention;

[0031] Figure 12 Schematic cross-sectional structure diagram of the arc-shaped block in the embodiment of the present invention.

[0032] The reference numerals in the figure respectively represent: 1, needle rod sleeve; 11, guide member; 111, magnetic block; 112, vertical groove; 113, limit block; 114, annular groove; 12, disassembly member; 121, baffle; 122, moving groove; 123, tension spring; 13, spring; 14, electrical contact piece; 15, arc-shaped block; 2, tip rod; 21, conical block; 22, mounting assembly; 221, connecting rod; 222, torsion spring; 223, ratchet block; 23, limit groove; 24, limit plate; 25, contact head. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0034] The present invention will be further described below with reference to the embodiments. Embodiment

[0035] Please refer to Figures 1 - 12 , the present invention provides a technical solution: a current probe with a replaceable tip and a quick locking structure, including:

[0036] Needle rod sleeve 1;

[0037] Tip rod 2, the tip rod 2 is slidably connected to the inside of the needle rod sleeve 1 through a conical block 21 sleeved on its outer circumferential surface, an installation assembly 22 for connecting the needle rod sleeve 1 is arranged on the outer surface of the tip rod 2, the conical block 21 is designed with a thinner upper part and a thicker lower part, and the diameter of its bottom end is the same as the diameter of the inner wall of the needle rod sleeve 1, which can ensure its stability when the two are fixedly installed and used, and avoid shaking during use;

[0038] Among them, the installation component 22 includes a connecting rod 221. The connecting rod 221 is rotationally connected to the circumferential outer surface of the needle tip rod 2 through a shaft rod arranged inside it, and a torsion spring 222 connected to the inside of the connecting rod 221 is sleeved on the circumferential outer surface of the shaft rod. A ratchet block 223 for fixing the connecting rod 221 is fixedly connected to the circumferential inner surface of the needle rod sleeve 1;

[0039] Among them, a guide member 11 for installing the needle tip rod 2 is provided at the bottom end of the needle rod sleeve 1, and a disassembling member 12 for separating the needle tip rod 2 is provided inside the needle rod sleeve 1.

[0040] The guide member 11 includes a magnetic block 111. The upper surface of the magnetic block 111 is fixedly connected to the bottom end of the needle rod sleeve 1. The upper surface of the connecting rod 221 is magnetically designed to be magnetically connected to the magnetic block 111. Four connecting rods 221 are provided and are circumferentially arrayed around the central axis of the needle tip rod 2.

[0041] A vertical groove 112 is opened inside the needle rod sleeve 1. The bottom of the vertical groove 112 is designed in a flared shape. The vertical groove 112 and the magnetic block 111 are staggered with respect to the central axis of the needle tip rod 2, and the included angle between the magnetic block 111 and the vertical groove 112 is 45 degrees. A limiting block 113 that fits against the inner wall of the vertical groove 112 is fixedly connected to the circumferential outer surface of the needle tip rod 2. The top end of the limiting block 113 is designed in a pointed shape. An annular groove 114 is opened inside the needle rod sleeve 1, and the annular groove 114 is communicated with the inside of the vertical groove 112.

[0042] The needle rod sleeve 1 is connected with an electric contact piece 14 through a spring 13 arranged at the top end of its inner wall. The lower surface of the electric contact piece 14 is in contact with the top end of the needle tip rod 2.

[0043] The disassembling member 12 includes a baffle plate 121. A moving groove 122 communicated with the inside of the annular groove 114 is opened inside the needle rod sleeve 1. The outer surface of the baffle plate 121 fits and slides on the inner wall of the moving groove 122. A tension spring 123 connected to the outer surface of the baffle plate 121 is arranged inside the moving groove 122. The baffle plate 121 is initially located on one side of the inner wall of the moving groove 122.

[0044] A receiving cavity for placing the connecting rod 221 is opened on the circumferential outer surface of the needle tip rod 2. Therefore, a limiting groove 23 communicated with the inside of the receiving cavity is opened inside the needle tip rod 2. A limiting plate 24 is slidably connected inside the limiting groove 23.

[0045] An arc-shaped block 15 is fixedly connected to the circumferential inner surface of the needle rod sleeve 1, and four arc-shaped blocks 15 are arranged with respect to the central axis of the needle rod sleeve 1. A ratchet groove is opened on one side of the arc-shaped block 15 close to the central axis of the needle rod sleeve 1, and a sound will be generated when the connecting rod 221 passes by. A contact head 25 is fixedly connected to the bottom end of the needle tip rod 2.

[0046] Process of installing the tip needle rod 2 inside the needle rod sleeve 1:

[0047] In the initial state, multiple tip needle rods 2 are neatly accommodated inside the outer box. Under the action of the internal torsion spring 222, the connecting rod 221 is in an unfolded state and is perpendicular to the tip needle rod 2. When a current probe is needed, confirm the required model and size of the tip needle rod 2 according to the label pasted on the box. Hold the needle rod sleeve 1 and move the lower end thereof closer to the upper side of the required tip needle rod 2. Since the upper surface of the connecting rod 221 is magnetically designed, when the needle rod sleeve 1 approaches, the magnetic block 111 below it magnetically connects with the connecting rod 221, and the entire tip needle rod 2 is instantly magnetically attracted to separate from the outer box. There are four connecting rods 221 and four magnetic blocks 111. The width of the magnetic block 111 is slightly larger than the width of the connecting rod 221, and they correspond to each other one by one. Each group of connecting rods 221 is located at the middle position of its corresponding magnetic block 111.

[0048] At this time, the entire tip needle rod 2 is adsorbed below the needle rod sleeve 1 through the connecting rod 221. Due to the one-to-one corresponding magnetic attraction, the tip needle rod 2 is at the middle position below the needle rod sleeve 1, and the central axis of the tip needle rod 2 is basically the same as that of the needle rod sleeve 1. The connecting rod 221 and the limiting block 113 are staggered on the outer circumferential surface of the tip needle rod 2, and the included angle between the connecting rod 221 and the limiting block 113 is 45 degrees. The magnetic block 111 and the vertical groove 112 are staggered with respect to the central axis in the radial direction of the needle rod sleeve 1, and the included angle between the magnetic block 111 and the vertical groove 112 is 45 degrees. Since the magnetic block 111 and the connecting rod 221 correspond to each other one by one, in this state, the radial directions where the vertical groove 112 and the limiting block 113 are located are the same.

[0049] In this state, the user moves the tip rod 2 into the inside of the needle rod sleeve 1 without the need to align the central axis again. The diameter of the inner circumferential wall at the bottom end of the needle rod sleeve 1 is larger than the circumferential diameter of the top end of the tip rod 2. The top end of the tip rod 2 smoothly penetrates into the inside of the needle rod sleeve 1. The limiting block 113 on the outer circumferential surface of the tip rod 2 corresponds to the vertical groove 112. The vertical groove 112 extends to the lower surface of the needle rod sleeve 1 and is designed in a flared shape. The width of the vertical groove 112 at the bottom of the needle rod sleeve 1 is larger, and it becomes narrower after extending upward for a short distance. The limiting block 113 also has a pointed design. The width of the limiting block 113 near the connecting rod 221 is narrower, and the width of the limiting block 113 near the tapered block 21 is wider. The special shape design of the limiting block 113 and the vertical groove 112 plays a role in guiding and limiting, and can smoothly move the tip rod 2 into the inside of the needle rod sleeve 1. It is ensured that under the action of the limiting block 113 and the vertical groove 112, the tip rod 2 is stably placed inside the needle rod sleeve 1, and is in stable contact with the object to be measured during the subsequent measurement process, which can limit and ensure that the tip of the current probe accurately contacts the target position of the object to be measured during the measurement process, avoiding inaccurate measurement points caused by the position deviation of the tip rod 2, thereby improving the accuracy and repeatability of the measurement.

[0050] When the limiting block 113 moves with the tip rod 2, it enters the inner wall of the vertical groove 112. Its tip enters from the flared opening at the bottom end of the vertical groove 112 until it moves to the height where the width of the vertical groove 112 resumes. The two sides of the limiting block 113 are in sliding contact with the inner wall of the vertical groove 112. In this state, the tip rod 2 as a whole cannot rotate and can only move axially. During the process of the tip rod 2 entering the inside of the needle rod sleeve 1, the connecting rod 221 moves together with the tip rod 2. When moving, it is blocked by the magnetic block 111 and rotates on the outer surface of the tip rod 2 under the action of the torsion spring 222. The outer end of the connecting rod 221 that is initially far from the outer surface of the tip rod 2 approaches the outer surface of the tip rod 2 at this time. The connecting rod 221 is in an inclined and contracted state. In this state, the circumferential diameter formed by the outer ends of the four connecting rods 221 is equal to the circumferential diameter of the inner wall of the needle rod sleeve 1.

[0051] As the needle tip rod 2 continues to drive the limit block 113, the connecting rod 221 and other components to move into the needle bar sleeve 1, the side of the connecting rod 221 away from the needle tip rod 2 fits with the inner surface of the needle bar sleeve 1 until the connecting rod 221 moves to the position of the ratchet block 223, when the side of the connecting rod 221 fits with the inclined surface of the ratchet block 223. Since the needle bar sleeve 1 is stationary, the needle tip rod 2 moves, and the ratchet block 223 and the connecting rod 221 connected thereto are in a relative motion state. The connecting rod 221 is moved toward the central axis of the needle tip rod 2 by the ratchet block 223, and the connecting rod 221 rotates under the action of the torsion spring 222, and is almost horizontal with the needle tip rod 2. At this time, the top of the needle tip rod 2 fits with the lower surface of the power strip 14. As the needle tip rod 2 continues to move, the connecting rod 221 completely passes through the position of the ratchet block 223, and the connecting rod 221 loses the obstruction of the ratchet block 223, and its side away from the needle tip rod 2 continues to fit with the circumferential inner surface of the needle rod sleeve 1.

[0052] During this process, the conical block 21 sleeved on the outer surface of the circumference of the needle tip rod 2 also enters the interior of the needle bar sleeve 1 simultaneously. The conical block 21 is designed to be thin at the top and thick at the bottom. The diameter of the top of the conical block 21 is the same as the diameter of the needle tip rod 2, and the diameter of the bottom of the conical block 21 is the same as the diameter of the needle bar sleeve 1. When the conical block 21 enters the interior of the needle bar sleeve 1, the correction action is completed, so that the axes of the needle bar sleeve 1 and the needle tip rod 2 are completely consistent, avoiding shaking due to incomplete fit of the needle tip rod 2 in the needle bar sleeve 1 during subsequent measurements. Stable contact can avoid measurement fluctuations caused by vibration.

[0053] When the outer end of the connecting rod 221 passes through the ratchet block 223 and disengages from it, the user can hear a clicking sound, which means that the needle tip rod 2 has been successfully installed inside the needle bar sleeve 1, and there is no need to continue moving the needle tip position. At this time, the spring 13 is in a slightly compressed state, which can make the top of the needle tip rod 2 always fit tightly with the lower surface of the power connection sheet 14, avoiding the problem of being unable to measure due to the gap. In this state, the radial direction of the needle tip rod 2 is limited by the limit block 113 and the vertical groove 112, and it cannot rotate. In the axial direction of the needle tip rod 2, the upper part is abutted by the spring 13 and the power connection sheet 14, and the lower connecting rod 221 is affected by the torsion spring 222 and expands outward, and is limited by the ratchet block 223 and cannot move downward. At this point, the needle tip rod 2 and the needle bar sleeve 1 are installed and can be used normally.

[0054] The process of removing the needle tip rod 2 from the inside of the needle rod sleeve 1:

[0055] When the contact head 25 is worn, or when other types of contact heads 25 need to be used, the tip rod 2 needs to be replaced. In the initial state, the baffle 121 is under the action of the tension spring 123 and is at the right end of the moving groove 122. In this state, the baffle 121 is on the right side of the vertical groove 112. Push the tip rod 2 upward. At this time, the tip rod 2 drives the electrical contact piece 14 to move upward. The spring 13 is in a tightly compressed state. The limiting block 113 on the outer surface of the tip rod 2 continues to slide along the inner wall of the vertical groove 112 until the limiting block 113 slides to the topmost position and enters the inner wall of the annular groove 114. There are four disassembly parts 12 arranged in a circumferential array with the central axis of the needle rod sleeve 1. Taking one group of disassembly parts 12 as an example, when the limiting block 113 moves to the topmost position of the vertical groove 112, since the baffle 121 is on the right side of the vertical groove 112, the limiting block 113 can smoothly enter the annular groove 114, and then rotate the entire tip rod 2 counterclockwise. During the upward movement of the connecting rod 221, the end of the connecting rod 221 away from the torsion spring 222 fits against the inner wall of the annular groove 114.

[0056] At this time, the limiting block 113 is affected by the annular groove 114, and the tip rod 2 cannot move radially. When the entire tip rod 2 rotates about 45 degrees, the outer side of the connecting rod 221 fits against the arc surface of the outer side of the arc surface block 15. Under the action of the arc surface block 15, the connecting rod 221 rotates around the shaft rod, and the side of the connecting rod 221 completely fits against the inner wall of the receiving cavity on the outer surface of the tip rod 2 and is in a vertical state. There is also a ratchet groove on the surface of the arc surface block 15 close to the central axis of the needle rod sleeve 1. When the connecting rod 221 passes by, a clicking sound will be emitted. At this time, invert the entire tip rod 2 and the needle rod sleeve 1 and turn it 180 degrees. At this time, the contact head 25 is at the topmost position.

[0057] Affected by gravity, the outer end of the limiting plate 24 in the limiting groove 23 extends into the accommodating cavity. The side of the limiting plate 24 close to the central axis of the tip rod 2 fits against the outer surface of the connecting rod 221, keeping the connecting rod 221 in a contracted state. At this time, continue to rotate the entire tip rod 2 in the original state. When the entire tip rod 2 is close to rotating 90 degrees, the side of the limiting block 113 in the forward rotation direction will fit against the baffle 121 in the next disassembly part 12. When the baffle 121 approaches the side of the corresponding vertical groove 112 of this disassembly part 12 in the rotation direction, the baffle 121 moves in the moving groove 122, and its maximum stroke is when the outer surface of the baffle 121 is coplanar with the inner wall of the vertical groove 112. During this process, the tension spring 123 undergoes elastic deformation and is stretched (the limiting block 113 is designed with a pointed head. When the tension spring 123 is used multiple times and its toughness becomes low and it undergoes fatigue and will not return to its initial position again, the pointed front end of the limiting block 113 first enters the annular groove 114 from the vertical groove 112 and squeezes the right side of the baffle 121 corresponding to this position. The limiting block 113 can smoothly enter the annular groove 114 to complete the quick disassembly work).

[0058] Since the inner part of the vertical groove 112 is connected to the inner part of the annular groove 114, after the limiting block 113 rotates, it is blocked by the baffle plate 121 and cannot move further. By pulling the needle tip rod 2 upward, the limiting block 113 enters the inner wall of the vertical groove 112 and fits with it. The baffle plate 121 inside the annular groove 114 is no longer affected by the limiting block 113 and quickly returns to its original state under the action of the tension spring 123. In this state, the whole needle tip rod 2 rotates 90 degrees, corresponding to the front and back of the initial position. At this time, the connecting rod 221 on the outer surface of the needle tip rod 2 still fits with the outer surface of the limiting plate 24 inside the accommodating cavity. During the upward movement of the needle tip rod 2, the connecting rod 221 passes through the ratchet block 223 without being affected and is in a contracted state. The whole needle tip is smoothly taken out from the inside of the needle rod sleeve 1. The spring 13 is arranged inside the needle rod sleeve 1, avoiding the loss of small parts during disassembly. The above installation process can be repeated. Take out a suitable needle tip rod 2 from the box body for reinstallation or storage.

[0059] In summary, the needle rod sleeve 1 and the needle tip rod 2 have the following advantages:

[0060] Advantage 1: The needle rod sleeve 1 and the needle tip rod 2 adopt a detachable design. When the contact head 25 part is worn, or when other types of contact heads 25 need to be used, only the whole needle tip rod 2 needs to be separated from the needle rod sleeve 1 and replaced. This design allows only the needle tip rod 2 to be replaced instead of the whole probe, which can save costs.

[0061] Advantage 2: Through the mutual cooperation of the guiding member 11 and the mounting assembly 22, the installation process of the needle tip rod 2 can be quickly completed. The user can quickly replace the needle tip rod 2 with different characteristics (such as different needle tip shapes, materials, lengths, etc.) to adapt to various complex test scenarios.

[0062] Advantage 3: Through the mutual cooperation among the arc-shaped block 15, the disassembly member 12, the mounting assembly 22 and the limiting plate 24, the disassembly process of the needle tip rod 2 can be quickly completed. The current probe that can quickly remove the needle tip rod 2 is more convenient to carry and store. When the probe needs to be moved or transported, the needle tip rod 2 can be disassembled and stored separately, avoiding the needle tip rod 2 being damaged by collision during transportation, and at the same time reducing the volume of the whole probe, which is convenient for storage and sorting.

[0063] Advantage 4: The entire installation and disassembly process does not require the use of additional tools. It only needs to be pressed and rotated by hand, and can be completed under the action of magnetic force and gravity. The installation and disassembly method without additional tools greatly improves the operation efficiency. The operator can quickly replace the tip rod 2 by hand, avoiding the cumbersome process of searching for the appropriate tool in the tool kit, installing and disassembling the tool, making the test process smoother, being able to complete multiple replacements of the tip rod 2 in a short time, significantly shortening the test preparation time and the overall test cycle, and improving the work efficiency.

[0064] Advantage 5: A magnetic block 111 is fixedly connected to the bottom end of the needle rod sleeve 1. The upper surface of the connecting rod 221 adopts a magnetic design that magnetically connects with the magnetic block 111. There are four magnetic blocks 111 and four connecting rods 221, and the magnetic blocks 111 and the connecting rods 221 correspond one by one. It can complete the preliminary alignment of the central axis while the two end faces of the needle rod sleeve 1 and the tip rod 2 are attracted. Through the magnetic connection between the magnetic block 111 and the connecting rod 221, the two can be aligned with each other before installation, greatly reducing the installation time and operation difficulty, and avoiding the need to carefully adjust the position in the traditional installation method and ensuring the alignment of the central axis through visual observation or complex mechanical auxiliary devices, which is often cumbersome and time-consuming.

[0065] Advantage 6: During use, in the axial direction, both sides of the limiting block 113 on the outer circumference of the tip rod 2 are in contact with the inner wall of the vertical groove 112 and cannot rotate horizontally; in the radial direction, the connecting rod 221 is in an unfolded state under the action of the torsion spring 222 and is blocked by the lower ratchet block 223, while the upper part is pressed by the spring 13 through the electrical connection piece 14. During normal use, even if the entire tip rod 2 is pressed to the deepest, it will not disassemble, ensuring that the measurement process will not be interrupted due to accidental disconnection. The stable connection can continuously obtain current data, ensuring the integrity and continuity of the data and improving the safety performance during use.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electric current probe with a replaceable tip and a quick locking structure, characterized in that, Comprising: Needle bar sleeve (1); Needle tip bar (2), the needle tip bar (2) is slidably connected to the inside of the needle bar sleeve (1) through a tapered block (21) sleeved on its circumferential outer surface, and an installation component (22) for connecting the needle bar sleeve (1) is arranged on the outer surface of the needle tip bar (2); Among them, the installation component (22) includes a connecting rod (221), the connecting rod (221) is rotationally connected to the circumferential outer surface of the needle tip bar (2) through a shaft rod arranged inside it, and a torsion spring (222) connected to the inside of the connecting rod (221) is sleeved on the circumferential outer surface of the shaft rod, and a ratchet block (223) is fixedly connected to the circumferential inner surface of the needle bar sleeve (1); Among them, a guiding member (11) for installing the needle tip bar (2) is arranged at the bottom end of the needle bar sleeve (1), and a disassembling member (12) for separating the needle tip bar (2) is arranged inside the needle bar sleeve (1); Among them, the guiding member (11) includes a magnetic block (111), the upper surface of the magnetic block (111) is fixedly connected to the bottom end of the needle bar sleeve (1), the upper surface of the connecting rod (221) is magnetically connected to the lower surface of the magnetic block (111), four connecting rods (221) are arranged and are circumferentially arrayed around the central axis of the needle tip bar (2), a vertical groove (112) is opened inside the needle bar sleeve (1), the bottom of the vertical groove (112) is designed in a flared shape, the vertical groove (112) and the magnetic block (111) are staggered with respect to the central axis of the needle tip bar (2), and the included angle between the magnetic block (111) and the vertical groove (112) is 45 degrees, a limiting block (113) fittingly attached to the inner wall of the vertical groove (112) is fixedly connected to the circumferential outer surface of the needle tip bar (2), and an annular groove (114) is opened inside the needle bar sleeve (1), and the annular groove (114) is communicated with the inside of the vertical groove (112).

2. The current probe with a replaceable tip and a quick locking structure according to claim 1, characterized in that: The needle bar sleeve (1) is connected with an electric contact piece (14) through a spring (13) arranged at the top end of its inner wall, and the lower surface of the electric contact piece (14) is in contact with the top end of the needle tip bar (2).

3. A current probe having a replaceable tip and a quick locking structure according to claim 1, characterized in that: The disassembling member (12) includes a baffle (121), a moving groove (122) communicated with the inside of the annular groove (114) is opened inside the needle bar sleeve (1), the outer surface of the baffle (121) fits and slides on the inner wall of the moving groove (122), and a tension spring (123) connected to the outer surface of the baffle (121) is arranged inside the moving groove (122).

4. The current probe with a replaceable tip and a quick locking structure according to claim 1, characterized in that: A receiving cavity for placing the connecting rod (221) is opened on the circumferential outer surface of the needle tip bar (2), a limiting groove (23) communicated with the inside of the receiving cavity is opened inside the needle tip bar (2), and a limiting plate (24) is slidably connected inside the limiting groove (23).

5. The current probe with a replaceable tip and a quick locking structure according to claim 1, characterized in that: An arc-shaped block (15) is fixedly connected to the circumferential inner surface of the needle bar sleeve (1), and four arc-shaped blocks (15) are arranged around the central axis of the needle bar sleeve (1), and a contact head (25) is fixedly connected to the bottom end of the needle tip bar (2).

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