CN220568928U - Telescopic magnetic measurement probe assembly and Tesla gauge with same - Google Patents

Abstract

The utility model relates to a telescopic magnetic measurement probe assembly and a tesla meter with the same, wherein the probe assembly comprises a probe shell, a moving assembly and a magnetic measurement probe; an opening is formed in one end of the probe shell, a guide rail is arranged on the front surface of the probe shell, a sliding groove is formed in the probe shell, and a rack locking part is arranged on the side wall of the sliding groove; the moving assembly comprises a sliding block, a pushing block and an elastic sheet, wherein the sliding block is connected with the magnetic measurement probe and is slidably arranged in the chute; the elastic sheet is arranged on the sliding block, two limiting parts are arranged on the elastic sheet corresponding to the rack locking parts, and the limiting parts can move along one direction of the rack locking parts and limit and lock in the opposite direction; the pushing block is movably arranged on the sliding block, the unlocking block is arranged on the pushing block, and when the pushing block moves along the guide rail, the unlocking block pushes the corresponding limiting part on the elastic sheet to move so as to release the limiting locking with the rack locking part and drive the sliding block to slide along the sliding groove, so that the probe extends out of or retracts into the opening of the probe shell.

Description

Telescopic magnetic measurement probe assembly and Tesla gauge with same

Technical Field

The utility model belongs to the technical field of magnetic parameter measurement, and particularly relates to a telescopic magnetic measurement probe assembly and a tesla meter with the same.

Background

In the current market, the measuring probe of the portable magnetic parameter measuring device such as a tesla meter (also called a gauss meter) basically has a pen-shaped form with a cap, and the probe belongs to a vulnerable part, so that certain requirements are required for the use and protection of the probe. For example, the digital display tesla meter disclosed in chinese patent publication No. CN212845872U uses a capped pen-shaped probe, and when the magnetic parameter measurement is performed by using such tesla meter, the pen cap (i.e., the probe sheath) needs to be removed before the digital display tesla meter can be used.

The portable magnetic parameter measuring equipment is operated by holding the probe by an operator in most measuring scenes, and the probe testing area stretches into a position point close to the position to be tested, and most of the testing area is narrow in space, so that the probe testing area is designed to be as small as possible so as to be convenient for measurement, the probe testing area is miniaturized to be convenient for testing, and meanwhile, the portable magnetic parameter measuring equipment is troublesome for protecting the probe testing area. When the probe is not used, the small probe test area is easily damaged by external force collision, so that a probe sheath similar to a pen cap is added to protect the probe test area in the market. In addition, the capped pencil probe thus designed has a disadvantage in that the cap is substantially, if not entirely, axially displaced from the probe, subject to frictional stresses on the probe test area, which increases wear on the probe test area and shortens the useful life of the probe. In addition, the probe body and the probe test area are overlapped in extension length, so that the whole length of the probe pen body is longer, the boundary area between the pen cap and the probe body is weaker in strength, and the probe is easily damaged due to improper operation due to the slender whole body.

Accordingly, there is a need in the art to equip portable magnetic parameter measurement devices with retractable magnetic measurement probe assemblies to overcome the above-described shortcomings.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a telescopic magnetic measurement probe assembly which not only ensures the test sensitivity and flexibility of the magnetic measurement probe, but also can improve the good protection of the magnetic measurement probe, and a tesla meter with the same.

The utility model provides a telescopic magnetic measurement probe assembly, which comprises a probe shell, a moving assembly and a magnetic measurement probe, wherein the probe shell is provided with a plurality of magnetic sensors;

an opening is formed in one end of the probe shell, a guide rail is arranged on the front surface of the probe shell, a chute parallel to the length direction of the guide rail is also formed in the probe shell, and a rack locking part is arranged on at least one side wall of the chute;

the moving assembly comprises a sliding block, a pushing block and an elastic sheet, wherein the sliding block is connected with the magnetic measurement probe and is slidably arranged in the chute;

the elastic sheet is arranged on the sliding block, two limiting parts are arranged on the elastic sheet corresponding to the rack locking parts of the sliding grooves, and each limiting part can longitudinally move along one direction of the rack locking part and is limited and locked in the opposite direction;

the pushing block is movably arranged on the sliding block, an unlocking block is arranged on one side of the limiting part of the elastic piece, and when the pushing block is moved along the guide rail, the unlocking block pushes the limiting part corresponding to the elastic piece to move so as to release the limiting locking with the rack locking part and drive the sliding block to slide along the sliding groove, so that the magnetic measurement probe extends out of or retracts into the opening of the probe shell.

Further, the elastic sheet comprises a base and wing parts symmetrically arranged at two ends of the base, and the end parts of the wing parts are bent towards the base to form limiting parts.

Still further, the pushing block comprises a top pushing button, a support column and a middle pushing table, one end of the support column is fixed on the top pushing button, the other end of the support column extends out from the middle pushing table and can be movably matched with the pushing block connecting structure on the sliding block, the middle pushing table is arranged in the middle of the support column, the unlocking block is arranged on the middle pushing table, and the support column part of the pushing block between the top pushing button and the middle pushing table can be guided through a guide rail, so that the pushing block can move on the sliding block.

Furthermore, the unlocking block is arranged on one side of the middle pushing table, which is away from the top pushing button, and the side surface of the unlocking block is abutted against the elastic sheet.

Still further still be provided with the spacing groove that is used for prescribing a limit to the side direction position of pushing block in the probe casing, guide rail, spacing groove and spout set gradually.

Still further, a level gauge is provided on the probe housing.

Still further, adjacent teeth on the rack lock portion are spaced apart by 2mm-3mm.

Still further, the maximum extended position of the retractable magnetic measurement probe assembly is 50mm.

Still further, a hall sensor is configured on the magnetic measurement probe of the retractable magnetic measurement probe assembly.

The utility model also provides a tesla meter, which comprises the telescopic magnetic measurement probe assembly and a test host, wherein the telescopic magnetic measurement probe assembly is connected with the test host through a wire.

The telescopic magnetic measurement probe assembly has the advantages that the magnetic measurement probe can be retracted to the probe shell when the magnetic measurement probe is not used, so that the magnetic measurement probe is physically protected, a conventional pen cap sheath is not needed, abrasion to a test area of the magnetic measurement probe when the magnetic measurement probe is taken off can be reduced, the magnetic measurement probe is extended out of the opening when the magnetic measurement probe is used, and the test sensitivity of the magnetic measurement probe is ensured.

The rack locking part, the limiting part on the elastic sheet and the unlocking block on the pushing block form a stable and reliable movement limiting structure, when the pushing block is not moved, the whole moving assembly and the magnetic measurement probe can be fixed at a proper position of the probe shell, and when the pushing block is moved, the limiting part in a limiting locking state in the required moving direction can be unlocked simultaneously, so that the whole moving assembly and the magnetic measurement probe can continuously move, on one hand, the stretching out or the retracting of the magnetic measurement probe can be adjusted, on the other hand, the stretching out distance of the magnetic measurement probe can be adjusted, the effect of adjusting the stretching out length of a testing area of the magnetic measurement probe according to testing requirements is realized, the testing flexibility is increased, when the stretching out distance of the magnetic measurement probe is shorter, the whole strength can be increased, and the damage probability of the magnetic measurement probe is reduced.

Drawings

FIG. 1 is a schematic diagram of the connection of a Tesla gauge according to the present utility model;

FIG. 2 is a schematic view of the structure of the retractable magnetic measurement probe assembly of the present utility model in an extended state;

FIG. 3 is a schematic view of the structure of the retractable magnetic measurement probe assembly of the present utility model in a fully retracted state;

FIG. 4 is a partial transverse cross-sectional view of a retractable magnetic measurement probe assembly of the present utility model (the left-right direction of the illustration being consistent with the left-right direction of FIGS. 2 and 3);

fig. 5 is an enlarged cross-sectional view of the pusher block of fig. 4 taken along the A-A direction.

In the figures, 1-the probe housing; 11-a guide rail; 12-sliding grooves; 13-a rack lock; 14-a limit groove; 15-opening; 2-a moving assembly; 21-a slider; 211-slotting; 22-pushing blocks; 221-top push button; 222-a pillar; 223—middle pushing table; 224-unlocking block; 225-limiting blocks; 23-shrapnel; 231-base; 232-wings; 233-a limiting part; 3-a magnetic measurement probe; 4-testing a host; 5-level gauge; 6-conducting wire.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; the device can be mechanically connected, electrically connected, physically connected or wirelessly connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

As shown in fig. 2-4, the utility model provides a telescopic magnetic measurement probe assembly, which comprises a probe shell 1, a moving assembly 2 and a magnetic measurement probe 3, wherein the probe shell 1 is used for providing a containing space for the magnetic measurement probe 3 so as to physically protect the magnetic measurement probe 3, one end of the probe shell 1 is provided with an opening 15, and the moving assembly 2 is connected with the magnetic measurement probe 3 so as to control the movement of the magnetic measurement probe 3. The magnetic measurement probe 3 is slidably disposed in the probe housing 1 via the moving assembly 2 such that the magnetic measurement probe 3 can be extended out of the opening 15 of the probe housing 1 (refer to fig. 2) or retracted into the probe housing 1 (refer to fig. 3).

The front of the probe shell 1 is provided with a guide rail 11, the guide rail 11 is arranged along the length direction of the probe shell 1, a chute 12 parallel to the length direction of the guide rail is also arranged in the probe shell 1, at least one side wall of the chute 12 is provided with a rack locking part 13, and the chute 12 is communicated with an opening 15. It should be noted that the rack locking portion 13 may be disposed on one side of the chute 12, or the rack locking portion 13 may be disposed on both sides of the chute 12, and the rack locking portion 13 is a tooth structure disposed along a length direction of a side wall of the chute 12.

The moving assembly 2 includes a slide block 21, a push block 22 and a spring piece 23, the slide block 21 is connected with the magnetic measurement probe 3 and slidably disposed in the slide groove 12, and the magnetic measurement probe 3 can be extended or retracted from the opening 15 of the probe housing 1. Preferably, the connection of the magnetic measurement probe 3 and the sliding block 21 is detachable, facilitating the disassembly and replacement of the magnetic measurement probe 3.

The spring piece 23 is mounted on the slider 21. Preferably, the elastic piece 23 is embedded in the sliding block 21 so that at least part of the structure of the elastic piece 23 can be elastically deformed. Two limiting parts 233 are arranged on the elastic sheet 23 corresponding to the rack locking parts 13 of the sliding grooves 12, and when no external force acts on the limiting parts 233, each limiting part 233 and the rack locking part 13 form a ratchet-like mechanism, so that each ratchet-like mechanism is allowed to move along one direction but is limited and locked along the other direction. Since the movable directions of the two ratchet-like mechanisms are opposite and the limiting directions are opposite, when no external force acts on the elastic sheet 23, the whole moving assembly 2 is in a locking state, and the sliding block 21 and the magnetic measuring probe 3 are locked in place in the sliding groove 12. Thus, the magnetic measurement probe 3 can stably maintain the detection state when the probe housing 1 is extended for detection, and the magnetic measurement probe 3 can maintain the protection state when the probe housing 1 is retracted for protection.

The push block 22 is movably arranged on the slide block 21, i.e. the push block 22 is movable relative to the slide block 21. The pushing block 22 is provided with unlocking blocks 224 on the side of the limiting portion 233 of the elastic sheet 23, and at least two unlocking blocks 233 are correspondingly provided because at least two limiting portions 233 are provided. When the pushing block 22 is moved, the unlocking block 224 pushes the corresponding limiting portion 233 of the elastic piece 23 to move to release the limiting locking with the rack locking portion 13, that is, when the pushing block 22 is moved, the unlocking block 224 pushes the limiting portion 233 corresponding to the limiting locking state to move, so that the limiting portion 233 is separated from the rack locking portion 13, and the limiting locking state is released, at this time, in the moving direction, one limiting portion 233 is in a movable state, and the other limiting portion 233 releases the limiting locking state, so that the moving assembly 2 can slide along the chute 12 in the moving direction, and then the magnetic measurement probe 3 is driven to move, so that the magnetic measurement probe 3 extends out of or retracts into the opening 15 of the probe housing 1.

The telescopic magnetic measurement probe assembly provided by the utility model can retract the magnetic measurement probe 3 to the probe shell 1 when the magnetic measurement probe 3 is not used, so that the magnetic measurement probe 3 is physically protected, a conventional pen cap sheath is not needed, the abrasion to a test area of the magnetic measurement probe 3 when the magnetic measurement probe 3 is taken off can be reduced, and the magnetic measurement probe 3 is extended out of the opening 15 when the magnetic measurement probe 3 is used, so that the test sensitivity of the magnetic measurement probe 3 is ensured.

The rack locking portion 13, the limiting portion 233 on the elastic sheet 23 and the unlocking block 224 on the pushing block 22 form a stable and reliable movement limiting structure, when the pushing block 22 is not moved, the whole moving assembly 2 and the magnetic measurement probe 3 can be fixed at a proper position of the probe shell 1, when the pushing block 22 is moved, the limiting portion 233 in a limiting locking state in a required moving direction can be unlocked, then the whole moving assembly 2 can drive the magnetic measurement probe 3 to continuously move along the sliding groove 12, on one hand, the stretching out or the retracting of the magnetic measurement probe 3 can be adjusted, on the other hand, the stretching out distance of the magnetic measurement probe 3 can be adjusted, the effect of adjusting the stretching out length of a testing area of the magnetic measurement probe 3 according to testing requirements is achieved, the testing flexibility is increased, when the stretching out distance of the magnetic measurement probe 3 is shorter, the whole strength can be increased, and the damage probability of the magnetic measurement probe 3 is reduced.

Referring to fig. 4, a rack locking portion 13 is disposed on a single side of the chute 12, two limiting portions 233 are disposed on the elastic sheet 23, and two unlocking blocks 224 are disposed on the pushing block 22 correspondingly. The left stopper 233 is elastically and smoothly passed through the rack lock 13 in a direction toward the left side of the rack lock 13, but the stopper 233 is engaged with the teeth of the rack lock 13 in a direction toward the right side of the rack lock 13, and thus the stopper is not movable. The limiting portion 233 on the right side is opposite to the movable direction and the limiting locking direction of the limiting portion 233 on the left side, and the principle of limiting locking is similar. When the pushing block 22 moves leftwards, since the pushing block 22 can move relative to the sliding block 21, the two unlocking blocks 224 move leftwards simultaneously, wherein the unlocking block 224 on the right side can apply force to push the limit part 233 on the right side to move, and at the moment, the limit part 233 on the right side is disengaged from the rack locking part 13, so that the sliding block 21 can smoothly move leftwards while the pushing block 22 is moved, and the magnetic measurement probe 3 is adjusted leftwards to a proper position; when the urging force is stopped from being applied to the urging block 22, the right stopper 233 resumes the restriction in the left direction, and the position restriction lock of the moving unit 2 is completed. When the pushing block 22 is moved rightward, the situation is just opposite to that when the pushing block 22 is moved leftward, the two unlocking blocks 224 move rightward simultaneously, wherein the left unlocking block 224 applies force to push the left limiting part 233 to move, and at the moment, the left limiting part 233 is disengaged from the rack locking part 13, so that the sliding block 21 can smoothly move rightward while the pushing block 22 is moved, and the magnetic measurement probe 3 can be adjusted to a proper position rightward.

It should be noted that the openings 15 of the magnetic measuring probe 3 and the probe housing 1 are not shown in fig. 4. In one embodiment, the opening 15 may be provided at the left end of the probe housing 1 as in fig. 2 and 3, the magnetic measurement probe 3 being fixedly connected to the left side of the slide block 21, moving the push block 22 to the left will extend the magnetic measurement probe 3 out of the opening 15, and moving the push block 22 to the right will retract the magnetic measurement probe 3 into the opening 15. In a further embodiment, the opening 15 may be provided at the right end of the probe housing 1, the magnetic measurement probe 3 being fixedly connected to the right side of the slider 21, moving the push block 22 to the left will retract the magnetic measurement probe 3 into the opening 15, and moving the push block 22 to the right will extend the magnetic measurement probe 3 out of the opening 15.

In one embodiment, the magnetic measurement probe 3 includes a circuit board firmly connected to the slider 21, and a hall sensor provided on the circuit board centrally on a surface of a tip of the circuit board protruding outward from a connection position of the slider 21.

In one embodiment, the elastic sheet 23 includes a base 231 and wing portions 232 symmetrically disposed at two ends of the base 231, and the end portions of the wing portions 232 are bent toward the base 231 to form a limiting portion 233, i.e. the limiting portion 233 has an angular structure, so that movement in one direction and limitation in the opposite other direction can be achieved by matching with the rack locking portion 13 on the chute 12.

The elastic piece 23 is installed on the sliding block 21, and the wing portion 232 of the elastic piece 23 is made of an elastic material, so that the wing portion 232 can elastically deform relative to the base portion 231 when being stressed and reset after the acting force disappears, the wing portion 232 is accommodated in the sliding groove 12, and the limiting portion 233 is conveniently meshed with the teeth of the rack locking portion 13. In a preferred embodiment, a clamping groove or a clamping block is provided on the sliding block 21, and the base 231 of the elastic piece 23 is clamped on the clamping groove or the clamping block, so as to realize the detachable installation of the sliding block 21 and the elastic piece 23.

In this embodiment, the elastic piece 23 is provided with two limiting portions 233. In the embodiment in which the rack locking portion 13 is provided on both sides of the chute 12, four sets of the wing portion 232 and the limit portion 233 are provided correspondingly.

In one embodiment, the included angle between the wing 232 and the base 231 is an acute angle, and one side of the unlocking block 224 is attached to the outer side of the wing 232.

In one embodiment, the slide block 21 is provided with a push block connection structure on the side facing the slide slot 12 for a movable fit with the push block 22.

Referring to fig. 5, the push block 22 includes a top push button 221, a support 222, and a middle push table 223, one end of the support 222 is fixed to the top push button 221, and the other end extends from the middle push table 223 and can be movably matched with a push block connection structure on the slide block 21, and a support portion of the push block 22 between the top push button 221 and the middle push table 223 can be guided by the guide rail 11, so that the push block 22 moves on the slide block 21 along the direction of the guide rail, and then the slide block 21 is driven to slide along the slide groove 12 by means of the elastic sheet 23 and the push block connection structure. In a preferred embodiment, the push block attachment structure is a slot 211, and the post 222 is slidably disposed in the slot 211 along the direction of movement of the slider 21. The middle pushing platform 223 is arranged in the middle of the support column 222, the unlocking block 224 is arranged on one side of the middle pushing platform 223, and a limiting block 225 can be arranged on the other side of the middle pushing platform 223 and used for limiting the base 231 of the elastic sheet 23 in cooperation with a clamping groove or a clamping block on the sliding block 21.

In one embodiment, the unlocking block 224 is disposed on a side of the middle pushing platform 223 away from the top pushing button 221, in this embodiment, the middle pushing platform 223 may be used to set the unlocking block 224 on one hand, and limit the elastic sheet 23 on the other hand, so as to avoid the elastic sheet 23 from moving, and improve the connection stability of the moving component.

In one embodiment, a limiting groove 14 for limiting the lateral position of the pushing block 22 is further arranged in the probe housing 1, and the guide rail 11, the limiting groove 14 and the sliding groove 12 are sequentially arranged.

In one embodiment, the probe housing 1 is provided with a level 5 for visually monitoring the flatness and straightness of the probe housing 1 and its guide rails 11.

In one embodiment, adjacent teeth on the rack lock 13 are 2mm-3mm apart. Preferably, the adjacent teeth on the rack locking part 13 are spaced by 2.4mm, so that the magnetic measurement probe 3 can be subjected to primary expansion and contraction adjustment of 2.4mm, and the high-precision expansion and contraction distance control of the magnetic measurement probe 3 is realized. In a preferred embodiment, the magnetic measuring probe 3 has a limit extension of 50mm, the external dimensions of the probe housing 1 are 22mm wide by 150mm long by 16mm thick, ensuring a compact and compact structure of the whole test magnetic measuring probe, and it should be noted that the above dimensions can be selected according to the specific circumstances.

Referring to fig. 1, the present utility model also provides a tesla meter comprising the retractable magnetic measurement probe assembly described above and a test host 4, wherein the retractable magnetic measurement probe assembly is connected to the test host 4 by a wire 6.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A telescopic magnetic measurement probe assembly, which is characterized by comprising a probe shell (1), a moving assembly (2) and a magnetic measurement probe (3);

an opening (15) is formed in one end of the probe shell (1), a guide rail (11) is arranged on the front surface of the probe shell (1), a sliding groove (12) parallel to the length direction of the guide rail (11) is further formed in the probe shell (1), and a rack locking part (13) is arranged on at least one side wall of the sliding groove (12);

the moving assembly (2) comprises a sliding block (21), a pushing block (22) and a spring piece (23), wherein the sliding block (21) is connected with the magnetic measurement probe (3) and is slidably arranged in the sliding groove (12);

the elastic piece (23) is arranged on the sliding block (21), two limiting parts (233) are arranged on the elastic piece (23) corresponding to the rack locking parts (13) of the sliding grooves (12), and each limiting part (233) can longitudinally move along one direction of the rack locking part (13) and is limited and locked in the opposite direction;

the pushing block (22) is movably arranged on the sliding block (21), the pushing block (22) is provided with an unlocking block (224) on one side of a limiting part (233) of the elastic sheet (23), when the pushing block (22) is moved along the guide rail (11), the unlocking block (224) pushes a corresponding limiting part (233) on the elastic sheet (23) to move so as to release the limiting locking with the rack locking part (13), and the sliding block (21) is driven to slide along the sliding groove (12), so that the magnetic measurement probe (3) stretches out or retracts into the opening (15) of the probe shell (1).

2. The retractable magnetic measurement probe assembly of claim 1, wherein the spring plate (23) includes a base (231) and wing portions (232) symmetrically disposed at both ends of the base (231), and the end portions of the wing portions (232) are bent toward the base (231) to form the limit portions (233).

3. The retractable magnetic measurement probe assembly of claim 1, wherein the pusher block (22) includes a top pusher button (221), a post (222), and an intermediate pusher table (223), one end of the post (222) is fixed to the top pusher button (221), the other end extends from the intermediate pusher table (223) and is movably engaged with a pusher block connection structure on the slider block (21), the intermediate pusher table (223) is disposed in a middle portion of the post (222), the unlocking block (224) is disposed on the intermediate pusher table (223), and a post portion of the pusher block (22) interposed between the top pusher button (221) and the intermediate pusher table (223) is guided by the guide rail (11) so that the pusher block (22) moves on the slider block (21).

4. A retractable magnetic measurement probe assembly according to claim 3, wherein the unlocking block (224) is arranged on a side of the middle push bench (223) facing away from the top push button (221), and a side of the unlocking block (224) abuts against the spring plate (23).

5. The retractable magnetic measurement probe assembly of claim 1, wherein a limit groove (14) for limiting the lateral position of the pushing block (22) is further arranged in the probe housing (1), and the guide rail (11), the limit groove (14) and the sliding groove (12) are sequentially arranged.

6. A retractable magnetic measurement probe assembly according to any of claims 1 to 5, wherein a level (5) is provided on the probe housing (1).

7. A retractable magnetic measurement probe assembly as claimed in any one of claims 1 to 5, wherein adjacent teeth on the rack lock (13) are spaced 2mm to 3mm apart.

8. A retractable magnetic measurement probe assembly as claimed in any one of claims 1 to 5, wherein the maximum extended position of the retractable magnetic measurement probe assembly is 50mm.

9. A retractable magnetic measurement probe assembly according to any of claims 1-5, wherein the magnetic measurement probe (3) of the retractable magnetic measurement probe assembly is provided with a hall sensor.

10. A tesla meter comprising a retractable magnetic measurement probe assembly according to any of claims 1-9 and a test host (4), the retractable magnetic measurement probe assembly being connected to the test host (4) by a wire (6).