Fine adjustment mechanism and ultrasonic probe clamping tool

Abstract

The utility model relates to the technical field of clamps, in particular to a fine adjustment mechanism and an ultrasonic probe clamping tool, which comprise an adjusting assembly, a track, sliding frames arranged on two sides of the track, clamping pieces arranged on the inner sides of the sliding frames, telescopic pieces arranged on one sides of the sliding frames, adjusting pieces arranged on the inner sides of the telescopic pieces and walking pieces. And one side of the sliding frame is in sliding fit with the end part of the rail. The fine adjustment mechanism has the beneficial effects that the fine adjustment mechanism can perform infinitesimal displacement on the ultrasonic probe, firstly, the sliding frame and the track are fixed by utilizing the clamping tool, so that the clamping tool and the fine adjustment mechanism can move relatively, and further, the clamping tool can perform infinitesimal displacement on the track; after the sliding frame and the track are fixed, the clamping tool can be slightly displaced through the rotating rod of the walking piece, the screw pitch of the spiral piece and the inclination degree of the spiral face can be adjusted through the adjusting piece, and then the axial movement of the rotating rod is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a fine-tuning mechanism and an ultrasonic probe clamping tool. Background Art

[0002] At present, the application of ultrasonic inspection has become more and more extensive, and the demand for new ultrasonic probes is also increasing. The NB / T40713.3-2015 standard has clear provisions on the probe angle. It is required that the deviation between the sound beam angle measured by the oblique probe and the nominal value is ≤2°. In order to ensure that the probe used at the work site meets the requirements, it is necessary to measure the front angle and other values ​​of the newly purchased probe.

[0003] Conventional measurement of the angle of an ultrasonic oblique probe is usually performed by a single person, and the front angle of the ultrasonic probe is detected using a CSK-IA test block. The probe and the test block are coupled with a coupling agent to achieve sound beam incidence, and the coupling agent plays a role in coupling and lubrication. During the inspection, the inspector presses the probe on the surface of the test block with one hand, and uses a ruler tool or the like in the other hand to do the measurement work. The lubrication effect of the coupling agent often causes the probe to move, and the staff cannot accurately move the probe to approach the highest echo position during measurement, resulting in inaccurate measurements. Therefore, a clamping fixture is required to ensure that the probe does not move easily, and an adjustment device is also required to ensure that the staff can make slight displacements of the probe when using the fixture. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the technical problem in the above-mentioned prior art that during inspection, the inspector presses the probe on the surface of the test block with one hand, and uses a ruler tool or the like to do measurement work with the other hand, the probe often moves due to the lubricating effect of the coupling agent, and the staff cannot accurately move the probe to approach the highest echo position during measurement, which leads to inaccurate measurement, the present utility model is proposed.

[0006] The utility model aims to provide a fine-tuning mechanism, which aims to help workers to perform a micro-displacement on an ultrasonic probe when using a clamping tool.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a fine-tuning mechanism, which includes an adjustment component, including a track, a sliding frame arranged on both sides of the track, a clamping member arranged on the inner side of the sliding frame, a telescopic member arranged on one side of the sliding frame, an adjustment member and a walking member arranged on the inner side of the telescopic member, one side of the sliding frame and the end of the track are slidably matched; the clamping member includes a sliding rod, a clamping plate and a rubber sheet, the sliding rod passes through and is slidably arranged on the inner side of the sliding frame, the clamping plate is fixedly arranged at the end of the sliding rod, and the rubber sheet is fixedly arranged on the side of the clamping plate.

[0008] As a preferred solution of the fine-tuning mechanism of the utility model, the clamping member also includes a bending shell, a sliding column, a connecting rod and a screw, and the sliding rod is provided in a pair. The bending shell is fixedly arranged at the end of the sliding rod, the sliding column is slidably arranged on the inner side of the bending shell, and the connecting rod is fixedly arranged on the side of the sliding column.

[0009] As a preferred solution of the fine-tuning mechanism of the utility model, wherein: the screw is rotatably arranged on one side of the connecting rod, the top of the curved shell is slidably arranged on the inner top of the sliding frame, and the screw is threadedly connected to the inner side of the sliding frame.

[0010] As a preferred solution of the fine-tuning mechanism of the utility model, the telescopic part includes a limiting cylinder, a rubber pad, a spiral piece and a ball, the limiting cylinder is fixedly arranged on the side of the sliding frame through a bracket, the rubber pad is fixedly arranged on the inner side of the limiting cylinder, the end of the spiral piece abuts against the inner side of the limiting cylinder, and the ball is rolled on one side of the spiral piece through the bracket.

[0011] As a preferred solution of the fine-tuning mechanism of the utility model, wherein: the spiral piece is made of elastic metal material, and the side surface of the ball abuts against the inner side of the rubber pad.

[0012] As a preferred solution of the fine-tuning mechanism of the utility model, wherein: the adjusting part includes an internal threaded barrel, a sliding hole, a top plate and two screws, the internal threaded barrel is fixedly arranged on the inner end surface of the limiting barrel, the sliding hole is opened on the side surface of the internal threaded barrel, and the top plate is sleeved on the side surface of the internal threaded barrel and slidably arranged on the inner wall of the sliding hole.

[0013] As a preferred solution of the fine-tuning mechanism of the utility model, wherein: the second screw penetrates the end face of the limiting cylinder and is threadedly connected to the inner wall of the internal threaded cylinder, the end face of the second screw abuts against the top plate, and the top plate abuts against the end of the spiral sheet.

[0014] As a preferred solution of the fine-tuning mechanism of the utility model, the walking part includes a rotating rod and a clamping rod, the rotating rod passes through and is slidably arranged on the end surface of the limiting cylinder, the clamping rod is provided with a pair of and fixedly arranged on the side surfaces of the rotating rod, and the clamping rod is slidably arranged on different sides of the spiral sheet.

[0015] The beneficial effects of the fine-tuning mechanism of the utility model are as follows: when the ultrasonic probe needs to be slightly displaced, the fine-tuning mechanism can first fix the sliding frame and the track by clamping, so that the clamping tool and the fine-tuning mechanism can move relative to each other, and then the clamping tool can be slightly displaced on the track; after the sliding frame and the track are fixed, the clamping tool can be slightly displaced by the rotating rod of the walking part, and the pitch of the spiral sheet and the inclination of the spiral surface can be adjusted by the adjusting part, so as to adjust the axial movement of the rotating rod.

[0016] Another object of the utility model is to provide an ultrasonic probe clamping tool, the purpose of which is to clamp the ultrasonic probe to ensure that the ultrasonic probe does not undergo unnecessary displacement during measurement.

[0017] In order to solve the above technical problems, the utility model also provides the following technical solutions: an ultrasonic probe clamping tool, which includes a fine-tuning mechanism; and a clamping assembly, including an aluminum plate, an anti-slip rubber, a telescopic frame, a limit rod, a spring and a tape measure, the aluminum plate is provided with a pair and slidably arranged on the outside of the track, the anti-slip rubber is fixedly arranged on one side of the aluminum plate, the telescopic frame is fixedly arranged on the side of the aluminum plate, and the output end of the telescopic frame is rotatably arranged on the side of the rotating rod.

[0018] As a preferred solution of the ultrasonic probe clamping tooling of the utility model, wherein: the limit rod is fixedly arranged on the side of one aluminum plate and passes through another aluminum plate, the spring is fixedly arranged on the side of the aluminum plate, and the tape measure is fixedly arranged on the side of the aluminum plate.

[0019] The beneficial effects of the ultrasonic probe clamping tool of the utility model are as follows: the ultrasonic probe clamping tool can clamp the ultrasonic probe without hindering the probe from emitting ultrasonic waves, thereby facilitating the staff to move the probe when performing measurements, and a tape measure is provided on the side of the clamping tool, facilitating the staff to measure the distance of the probe on the test block. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a working schematic diagram of the clamping fixture and fine-tuning mechanism in the utility model.

[0022] Figure 2It is a schematic diagram of the overall structure of the clamping fixture and fine-tuning mechanism in the utility model.

[0023] Figure 3 It is a schematic diagram of the structure of the clamping mechanism in the utility model.

[0024] Figure 4 It is a schematic diagram of the curved shell structure in the utility model.

[0025] Figure 5 It is a schematic diagram of the telescopic member structure in the utility model.

[0026] Figure 6 It is a schematic diagram of the spiral sheet structure in the utility model.

[0027] Figure 7 It is a schematic diagram of the structure of the adjusting member in the utility model. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1, reference Figure 1-2 , which is the first embodiment of the utility model, and this embodiment provides a fine-tuning mechanism, including an adjustment component 100, including a track 101, a sliding frame 102 arranged on both sides of the track 101, a clamping member 103 arranged on the inner side of the sliding frame 102, a telescopic member 104 arranged on one side of the sliding frame 102, an adjustment member 105 and a walking member 106 arranged on the inner side of the telescopic member 104, and one side of the sliding frame 102 and the end of the track 101 are slidably matched.

[0032] Usage process: The adjustment component 100 is used to adjust the clamping tooling to a small displacement, wherein the track 101 is used to connect the clamping tooling. Since the clamping tooling itself needs to move to both sides of the test block S, the track 101 needs to be slidably connected to the sliding frame 102, and the clamping member 103 is used to clamp the sliding frame 102 and the track 101, so that the clamping tooling can move with the track 101 as a reference. The telescopic member 104, the adjustment member 105 and the walking member 106 cooperate with each other to realize the fine-tuning function of the adjustment component 100.

[0033] Example 2, reference Figure 3-4 , which is the second embodiment of the utility model. Different from the previous embodiment, the clamping member 103 includes a slide bar 103a, a clamping plate 103b and a rubber sheet 103c. The slide bar 103a penetrates and is slidably arranged on the inner side of the slide frame 102. The clamping plate 103b is fixedly arranged at the end of the slide bar 103a. The rubber sheet 103c is fixedly arranged on the side of the clamping plate 103b. The clamping member 103 also includes a curved shell 103d, a sliding column 103e, a connecting rod 103f and A screw rod 103g and a pair of slide rods 103a are provided, a bending shell 103d is fixedly provided at the end of the slide rod 103a, a sliding column 103e is slidingly provided on the inner side of the bending shell 103d, a connecting rod 103f is fixedly provided on the side of the sliding column 103e, a screw rod is rotationally provided on one side of the connecting rod 103f, a top of the bending shell 103d is slidingly provided on the inner top of the sliding frame 102, and a screw rod 103g is threadedly connected to the inner side of the sliding frame 102.

[0034] The main function of the clamping member 103 is to fix the track 101 and the sliding frame 102 when the clamping tool needs to be slightly displaced. This arrangement is to enable the clamping tool to move on the track 101, wherein the track 101 can make the movement of the clamping tool more stable, thereby facilitating the realization of fine-tuning.

[0035] Usage process: When the clamping piece 103 is not clamped, the connecting rod 103f is located at the upper part of the curved shell 103d. At this time, the mobile clamping tooling will drive the fine-tuning mechanism to move together. When clamping is needed, first rotate the screw rod 103g. After the screw rod 103g is rotated, the connecting rod 103f is driven downward by the action of the thread. At the same time, the sliding column 103e also slides on the inner side of the curved shell 103d, and forces the sliding rod 103a to slide toward the center of the sliding frame 102. As the sliding rod 103a moves, the clamping plate 103b moves to both sides of the test block S, and finally the sliding frame 102 is fixed on the test block S. When the clamping piece is clamped, the clamping tooling can slide back and forth on the track 101 or drive the track 101 to move left and right.

[0036] Example 3, reference Figure 2 to Figure 7, which is the third embodiment of the utility model. Different from the previous embodiment, the telescopic member 104 includes a limiting cylinder 104a, a rubber pad 104b, a spiral piece 104c and a ball 104d. The limiting cylinder 104a is fixedly arranged on the side of the sliding frame 102 through a bracket, the rubber pad 104b is fixedly arranged on the inner side of the limiting cylinder 104a, the end of the spiral piece 104c abuts against the inner side of the limiting cylinder 104a, and the ball 104d is rolled on one side of the spiral piece 104c through the bracket. The spiral piece 104c is made of elastic metal material, and the side of the ball 104d abuts against the inner side of the rubber pad 104b.

[0037] The adjusting member 105 includes an internal threaded cylinder 105a, a sliding hole 105b, a top plate 105c and a second screw 105d. The internal threaded cylinder 105a is fixedly arranged on the inner end surface of the limiting cylinder 104a, the sliding hole 105b is opened on the side surface of the internal threaded cylinder 105a, the top plate 105c is sleeved on the side surface of the internal threaded cylinder 105a and is slidably arranged on the inner wall of the sliding hole 105b, the second screw 105d penetrates the end surface of the limiting cylinder 104a and is threadedly connected to the inner wall of the internal threaded cylinder 105a, the end surface of the second screw 105d abuts against the top plate 105c, and the top plate 105c abuts against the end of the spiral piece 104c.

[0038] The screw rod 105d rotates to drive the top plate 105c to move. The top plate 105c moves to squeeze the spiral piece 104c. However, the radial diameter of the spiral piece 104c changes during the expansion and contraction process, and the rubber pad 104b can just adapt to the diameter change of the spiral piece 104c. In order to prevent the edge of the spiral piece 104c and the rubber pad 104b from being unable to move due to excessive friction, the edge of the spiral piece 104c does not directly contact the rubber pad 104b, but is instead connected to the rubber pad 104b through the ball bearing 104b. 4d, when the spiral piece 104c contracts and the radial diameter becomes larger, the ball 104d rolls on the side of the rubber pad 104b and keeps approaching the rubber pad 104b. In this process, the ball 104d not only enables the spiral piece 104c to move smoothly along the side wall of the rubber pad 104b, but also because the ball 104d is recessed in the rubber pad 104b, it fixes the spiral piece 104c after it is deformed, thereby preventing the spiral piece 104c from moving when the rotating rod 106a rotates.

[0039] The walking member 106 includes a rotating rod 106a and a clamping rod 106b. The rotating rod 106a penetrates and is slidably arranged on the end surface of the limiting cylinder 104a. The clamping rod 106b is provided with a pair of and fixedly arranged on the side of the rotating rod 106a. The clamping rod 106b is slidably arranged on different sides of the spiral piece 104c.

[0040] Usage process: This embodiment mainly introduces two functions. First, the walking member 106 is used to directly fine-tune the clamping tooling, and then the adjustment member 105 and the telescopic member 104 cooperate to adjust the stride of fine-tuning. For the former, since the clamping rod 106b and the spiral piece 104c are slidably matched, and the spiral piece 104c itself is fixed, when the rotating rod 106a rotates, the clamping rod 106b slides along the inclined surface of the spiral piece 104c, thereby driving the rotating rod 106a to move, and the rotating rod 106a and the clamping tooling are connected, which can drive the clamping tooling to move; for the latter, first rotate the screw rod 105 d. The thread of the screw rod 105d moves inside the internal threaded tube 105a and squeezes the push rod. After the push rod moves, it squeezes the spiral piece 104c. After the spiral piece 104c is squeezed, in addition to the reduction in the pitch, the inclination of its inclined surface also increases, which causes the axial displacement of the clamping rod 106b when sliding along the spiral piece 104c to also become smaller, further reducing the fine-tuning step, and finally achieving more precise displacement adjustment. After reversing the screw rod, the push rod no longer squeezes the spiral piece 104c, and the spiral piece 104c begins to reset due to the elastic force of the rubber pad 104b, thereby achieving adjustment of the fine-tuning step.

[0041] Example 4, reference Figure 5 to Figure 7 , which is the fourth embodiment of the utility model, and this embodiment further provides an ultrasonic probe clamping tool. It includes a fine-tuning mechanism; and a clamping assembly 200, including an aluminum plate 201, an anti-skid rubber 202, a telescopic frame 203, a limit rod 204, a spring 205 and a tape measure 206. The aluminum plate 201 is provided with a pair of and slidably arranged on the outside of the track 101, the anti-skid rubber 202 is fixedly arranged on one side of the aluminum plate 201, the telescopic frame 203 is fixedly arranged on the side of the aluminum plate 201, the output end of the telescopic frame 203 is rotatably arranged on the side of the rotating rod 106a, the limit rod 204 is fixedly arranged on the side of one aluminum plate 201 and penetrates the other aluminum plate 201, the spring 205 is fixedly arranged on the side of the aluminum plate 201, and the tape measure 206 is fixedly arranged on the side of the aluminum plate 201

[0042] Usage process: Place the ultrasonic probe T between the aluminum plates 201, and keep the edge of the probe T aligned with the side of the aluminum plate 201 where the tape measure 206 is installed to ensure the accuracy of the measurement. Then press the two aluminum plates 201 with your hands to bring the two aluminum plates 201 close to each other and clamp the probe T. Then start moving the probe T. When approaching the highest point of the echo, use the fine-tuning mechanism to fine-tune the clamping fixture. When adjusted to the highest point of the echo, use the tape measure 206 to measure the distance from the probe T to the arc edge of the test block S.

[0043] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0044] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0045] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A fine-tuning mechanism, characterized in that: include, The adjustment assembly (100) comprises a track (101), a sliding frame (102) arranged on both sides of the track (101), a clamping member (103) arranged inside the sliding frame (102), a telescopic member (104) arranged on one side of the sliding frame (102), an adjustment member (105) and a running member (106) arranged inside the telescopic member (104), wherein one side of the sliding frame (102) is slidably matched with an end of the track (101); The clamping member (103) comprises a sliding rod (103a), a clamping plate (103b) and a rubber sheet (103c); the sliding rod (103a) penetrates and is slidably arranged on the inner side of the sliding frame (102); the clamping plate (103b) is fixedly arranged at the end of the sliding rod (103a); and the rubber sheet (103c) is fixedly arranged on the side of the clamping plate (103b).

2. The fine adjustment mechanism according to claim 1, characterized in that: The clamping member (103) also includes a bending shell (103d), a sliding column (103e), a connecting rod (103f) and a screw rod (103g), wherein the sliding rod (103a) is provided with a pair, wherein the bending shell (103d) is fixedly arranged at the end of the sliding rod (103a), the sliding column (103e) is slidably arranged on the inner side of the bending shell (103d), and the connecting rod (103f) is fixedly arranged on the side of the sliding column (103e).

3. The fine adjustment mechanism according to claim 2, characterized in that: The screw rod is rotatably arranged on one side of the connecting rod (103f), the top of the curved shell (103d) is slidably arranged on the inner top of the sliding frame (102), and the screw rod 1 (103g) is threadedly connected to the inner side of the sliding frame (102).

4. The fine adjustment mechanism according to claim 3, characterized in that: The telescopic member (104) comprises a limiting cylinder (104a), a rubber pad (104b), a spiral piece (104c) and a ball (104d); the limiting cylinder (104a) is fixedly arranged on the side of the sliding frame (102) through a bracket, the rubber pad (104b) is fixedly arranged on the inner side of the limiting cylinder (104a), the end of the spiral piece (104c) abuts against the inner side of the limiting cylinder (104a), and the ball (104d) is rollingly arranged on one side of the spiral piece (104c) through the bracket.

5. The fine adjustment mechanism according to claim 4, characterized in that: The spiral piece (104c) is made of elastic metal material and abuts against the side of the ball (104d) and the inner side of the rubber pad (104b).

6. The fine adjustment mechanism according to claim 5, characterized in that: The adjusting member (105) comprises an internal threaded tube (105a), a sliding hole (105b), a top plate (105c) and a second screw rod (105d); the internal threaded tube (105a) is fixedly arranged on the inner end surface of the limiting tube (104a); the sliding hole (105b) is opened on the side of the internal threaded tube (105a); the top plate (105c) is sleeved on the side of the internal threaded tube (105a) and slidably arranged on the inner wall of the sliding hole (105b).

7. The fine adjustment mechanism according to claim 6, characterized in that: The second screw rod (105d) passes through the end face of the limiting cylinder (104a) and is threadedly connected to the inner wall of the internal thread cylinder (105a). The end face of the second screw rod (105d) abuts against the top plate (105c), and the top plate (105c) abuts against the end of the spiral sheet (104c).

8. The fine adjustment mechanism according to claim 7, characterized in that: The walking member (106) includes a rotating rod (106a) and a clamping rod (106b), wherein the rotating rod (106a) penetrates and is slidably arranged on the end surface of the limiting cylinder (104a), and the clamping rod (106b) is provided with a pair of and is fixedly arranged on the side of the rotating rod (106a), and the clamping rod (106b) is slidably arranged on different sides of the spiral sheet (104c).

9. An ultrasonic probe clamping tool, characterized in that: comprising the fine-tuning mechanism according to any one of claims 1 to 8; and The clamping assembly (200) comprises an aluminum plate (201), an anti-skid rubber (202), a telescopic frame (203), a limit rod (204), a spring (205) and a measuring tape (206), wherein the aluminum plate (201) is provided with a pair of and is slidably arranged on the outside of a track (101), the anti-skid rubber (202) is fixedly arranged on one side of the aluminum plate (201), the telescopic frame (203) is fixedly arranged on the side of the aluminum plate (201), and the output end of the telescopic frame (203) is rotatably arranged on the side of a rotating rod (106a).

10. The ultrasonic probe clamping tool as claimed in claim 9, characterized in that: The limiting rod (204) is fixedly arranged on the side of one aluminum plate (201) and penetrates the other aluminum plate (201), the spring (205) is fixedly arranged on the side of the aluminum plate (201), and the measuring tape (206) is fixedly arranged on the side of the aluminum plate (201).

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