Construction project concrete crack detection ruler

Abstract

A concrete crack detection ruler for construction engineering relates to the field of detection rulers and is used for solving the problem that a crack detection ruler cannot detect the depth of a crack. The construction project concrete crack detection ruler comprises a holding plate, a scale plate, a width detection assembly and a sliding plate. A sliding groove is formed in the plate face of one side of the holding plate, and scales are marked on the inner wall face of the sliding groove in the length direction of the holding plate. The scale plate is fixedly arranged at one end of the holding plate, scales are marked on the wall face of one side of the scale plate in the length direction of the scale plate, and the length direction of the scale plate is perpendicular to the length direction of the holding plate; the width detection assembly is arranged on the scale plate and is used for detecting the length and the width of the crack; the sliding plate is arranged in the sliding groove in a sliding mode, the sliding groove penetrates through the end of the side, close to the scale plate, of the holding plate, the sliding plate can slide in the length direction of the holding plate and can at least partially slide out of the holding plate, and the length of the sliding plate is smaller than that of the sliding groove.

Description

Technical Field

[0001] This application relates to the field of inspection rulers, and particularly to a concrete crack inspection ruler for construction projects. Background Art

[0002] A concrete crack ruler is a tool specifically used to measure the width and length of cracks in concrete structures. The detection of crack dimensions, the analysis of the number and location, helps to judge the damaged condition of the building, and these data can also be used to guide the subsequent work direction.

[0003] The depth data of cracks is important data for crack judgment. However, due to the complex crack structure and the lack of unified rules for the internal condition of cracks, the depth data is usually obtained through more precise ultrasonic testing or optical testing methods. However, the equipment for ultrasonic testing or optical testing is more complex and professional, and the detection difficulty is relatively high. For general cracks, the inspection ruler does not have the function of depth detection and cannot meet the depth detection requirements. Utility Model Content

[0004] This application provides a concrete crack inspection ruler for construction projects to solve the problem that the crack inspection ruler cannot detect the depth of cracks.

[0005] This application provides a concrete crack inspection ruler for construction projects, including a holding plate, a scale plate, a width detection component, and a sliding plate; a chute is opened on one side surface of the holding plate, and scales are marked on the inner wall surface of the chute along the length direction of the holding plate; the scale plate is fixedly arranged at one end of the holding plate, and scales are marked on one side wall surface of the scale plate along the length direction of the scale plate, and the length direction of the scale plate is perpendicular to the length direction of the holding plate; the width detection component is arranged on the scale plate and is used to detect the length and width of the crack; the sliding plate is slidably arranged in the chute, the chute penetrates through one end of the holding plate close to the scale plate, the sliding plate can slide along the length direction of the holding plate and can at least partially slide out of the holding plate, and the length of the sliding plate is less than the length of the chute.

[0006] In this application, the holding plate and the width detection component can meet the detection purposes of the width and length of cracks by a conventional crack detector, and realize the basic functions of crack detection; the sliding plate can slide along the opening direction of the chute and can extend into the crack. At this time, the head of the sliding plate can contact the structure at the deepest part of the crack, and the tail of the sliding plate is correspondingly marked on the scale on the holding plate, and the depth of the crack detected this time can be read through the scale.

[0007] This solution has a simple structure. While meeting the requirements of detecting the width and length of cracks with the crack detection ruler, it can also achieve the depth detection of conventional cracks through the crack detection ruler in this solution, making up for the problem that existing crack detection rulers cannot detect the depth of cracks. At the same time, the crack detection ruler in this solution can also conduct conventional detection of cracks, and the detection data can be used as a reference for whether to carry out more precise crack inspection work, facilitating the arrangement of subsequent crack inspection work and crack repair work.

[0008] In some embodiments of the present application, the holding plate further includes a limiting portion, which is arranged at the end of the sliding groove away from the scale plate, and one end of the sliding plate abuts against the limiting portion. The limiting portion can restrict the sliding plate located in the sliding groove to prevent the sliding plate from sliding out of the sliding groove, resulting in obstacles to the depth detection function.

[0009] In some embodiments of the present application, a first limiting protrusion is arranged on the sliding plate. The first limiting protrusion is arranged on the side of the sliding plate away from the scale plate and on the plate surface of the sliding plate away from the holding plate. The first limiting protrusion is arranged on the plate surface of the sliding plate, and the user can conveniently slide the sliding plate in and out by holding the first limiting protrusion, thus facilitating the depth detection work of cracks.

[0010] In some embodiments of the present application, the holding plate further includes two second limiting protrusions and a limiting column. The two second limiting protrusions are arranged on the holding plate, and the two second limiting protrusions are arranged on both sides of the sliding groove; the second limiting protrusion is arranged between the first limiting protrusion and the scale plate, and there is a gap between the second limiting protrusion and the first limiting protrusion along the length direction of the holding plate; the limiting column abuts between the first limiting protrusion and the two second limiting protrusions.

[0011] The second limiting protrusion and the first limiting protrusion can cooperate with the limiting column to fix the sliding plate. When detecting the crack width through the width detection component, the sliding plate can be fixed, and the inspection work of the width and length of the crack detection ruler can be ensured.

[0012] In some embodiments of the present application, arc-shaped grooves are arranged on both the first limiting protrusion and the two second limiting protrusions, and an arc surface is arranged on the outer ring wall of the limiting column. The outer ring wall of the limiting column abuts against the inner wall of the arc-shaped groove. The arc-shaped grooves and the arc surface on the outer ring wall of the limiting column can work together to make the limiting column have a more stable limiting effect.

[0013] In some embodiments of the present application, the construction engineering concrete crack detection ruler further includes an elastic layer, which is arranged at the end of the sliding plate that can slide out of the sliding groove. The elastic layer can facilitate the abutment between the sliding plate and the deepest part of the crack. When the sliding plate impacts the inner wall of the crack, it can be buffered by the elastic layer, thereby protecting the sliding plate and improving the service life of the sliding plate.

[0014] In some embodiments of the present application, at one end of the sliding plate that slides out of the sliding groove, along the direction in which the sliding plate slides out of the sliding groove, the cross-sectional area of the sliding plate gradually decreases; the elastic layer is arranged at the end of the sliding plate that slides out of the sliding groove. The gradually decreasing cross-section at the end of the sliding plate can reduce the volume of the end of the sliding plate, thereby facilitating the sliding plate to slide into a narrower gap.

[0015] In some embodiments of the present application, the construction engineering concrete crack detection ruler further includes an abutting portion, the abutting portion is arranged on the side of the scale plate away from the holding plate, and the abutting portion is used to abut against the wall surface of the crack to be measured. The abutting portion can abut against the wall where the crack to be detected is located, so that the depth detection of the crack is more stable.

[0016] In some embodiments of the present application, a sliding hole is arranged on the back surface of the scale plate, the sliding hole is communicated with the sliding groove, the sliding hole is opened along the sliding direction of the sliding plate, and the sliding plate is accommodated in the sliding hole. The sliding hole can prevent interference between the sliding plate and the scale plate when the sliding plate slides out, thereby making the sliding of the sliding plate smoother. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the technical solutions of the present utility model, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the present utility model, and do not constitute a limitation to the technical solutions of the present utility model.

[0018] Figure 1 It is a schematic diagram of a construction engineering concrete crack detection ruler provided by an embodiment of the present application.

[0019] Figure 2 It is a partial sectional schematic diagram of a construction engineering concrete crack detection ruler provided by an embodiment of the present application.

[0020] Reference numerals: 1 - holding plate; 11 - sliding groove; 12 - limiting portion; 13 - second limiting protrusion; 131 - arc-shaped groove; 2 - scale plate; 21 - abutting portion; 22 - sliding hole; 3 - width detection assembly; 4 - sliding plate; 41 - first limiting protrusion; 42 - elastic layer; 5 - limiting column; 51 - arc surface. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0022] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0023] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0024] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. Additionally, when describing pipelines, the terms "connected" and "connected to" used in the present application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0025] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly, using words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0026] A concrete crack gauge is a tool specifically used to measure the width and length of cracks in concrete structures. The detection of crack dimensions, the analysis of the quantity and location, helps to judge the damaged condition of the building, and these data can also be used to guide the subsequent work direction.

[0027] The depth data of cracks is important data for crack judgment. However, due to the complex crack structure and the lack of a unified pattern in the internal condition of cracks, the depth data is usually obtained through more precise ultrasonic detection or optical detection methods. However, the equipment for ultrasonic detection or optical detection is more complex and professional, and the detection difficulty is relatively large. For general cracks, the crack gauge does not have the function of depth detection and cannot meet the depth detection requirements.

[0028] For this reason, please refer to Figure 1 , the present application provides a construction engineering concrete crack gauge, which includes a holding plate 1, a scale plate 2, a width detection component 3, and a sliding plate 4.

[0029] Please refer toFigure 1 , on one side surface of the holding plate 1, a sliding groove 11 is formed, and scales are marked on the inner wall surface of the sliding groove 11 along the length direction of the holding plate 1. The holding plate 1 can be the holding part used for a conventional crack detection ruler, which can be a cylinder or a strip-shaped plate; the material of the holding plate 1 can be wood, plastic products or metal products; the scales can be printed scales or engraved scales.

[0030] Please refer to Figure 1 , the sliding groove 11 can be a conventional sunk groove, the opening direction of the sliding groove 11 can be the length direction of the holding plate 1, and at the same time, the sliding groove 11 can penetrate through both ends of the holding plate 1 or only penetrate through one end of the holding plate 1.

[0031] Please refer to Figure 1 , the scale plate 2 is fixedly arranged at one end of the holding plate 1, scales are marked on one side wall surface of the scale plate 2 along the length direction of the scale plate 2, and the length direction of the scale plate 2 is perpendicular to the length direction of the holding plate 1. The scale plate 2 can be a common scale plate 2 in the crack detection ruler, which can be plate-shaped; the material of the scale plate 2 can be the same as that of the holding plate 1, for example, it can be wood at the same time, or plastic products or metal products.

[0032] Please refer to Figure 1 , the holding plate 1 and the scale plate 2 can be snap-connected, or bonded, welded or integrally formed. The scale plate 2 can be arranged at one end of the holding plate 1. At this time, there can be partial overlap between the holding plate 1 and the scale plate 2 to make the connection between the holding plate 1 and the scale plate 2 more stable.

[0033] Please refer to Figure 1 , the width detection component 3 is arranged on the scale plate 2, and the width detection component 3 is used to detect the length and width of the crack. The width detection component 3 can be a conventional width detection component 3, as long as it can realize width detection. Specifically, the width detection component 3 can use a sliding width detection method or a laser detection method for width detection, and both can achieve the effect of width detection. The structure and method of width detection belong to the common functions and common structures of the crack detection ruler, and will not be elaborated here.

[0034] Please refer to Figure 1 , the sliding plate 4 is slidably arranged in the sliding groove 11. The sliding groove 11 penetrates through one end of the holding plate 1 close to the scale plate 2. The sliding plate 4 can slide along the length direction of the holding plate 1 and can at least partially slide out of the holding plate 1. The length of the sliding plate 4 is less than the length of the sliding groove 11. The sliding plate 4 can be made of the same material as the holding plate 1, for example, it can be wood, or plastic products or metal products; corresponding structures to the sliding groove 11 can be arranged on both sides of the sliding plate 4 so that the edges of the sliding plate 4 can extend into the sliding groove 11.

[0035] Please refer to Figure 1 , the sliding plate 4 and the chute 11 can be connected by a roller screw structure or slidably connected by a conventional chute 11 structure, both of which can achieve the effect of sliding connection. The length of the sliding plate 4 being less than the length of the chute 11 enables the sliding plate 4 to be completely received within the chute 11, thereby preventing the crack detection ruler from coming into contact with the sliding plate 4 during the regular crack length and width detection.

[0036] The holding plate 1 and the width detection component 3 in this application can meet the detection purposes of the width and length of cracks by a conventional crack detector, realizing the basic functions of crack detection; the sliding plate 4 can slide along the opening direction of the chute 11 and can extend into the crack. At this time, the head of the sliding plate 4 can contact the structure at the deepest part of the crack, and the tail of the sliding plate 4 corresponds to the scale marked on the holding plate 1, and the depth of the crack detected this time can be read through the scale.

[0037] The structure of this solution is simple. While meeting the detection of the width and length of cracks by the crack detection ruler, the depth of conventional cracks can also be detected by the crack detection ruler in this solution, making up for the problem that the existing crack detection ruler cannot detect the crack depth; at the same time, the crack detection ruler in this solution can also perform conventional detection on cracks, and the detection data can be used as a reference for whether to carry out more accurate crack inspection work, facilitating the arrangement of subsequent crack inspection work and crack repair work.

[0038] Please refer to Figure 1 , in some examples, when the chute 11 adopts a conventional chute 11, the cross-section of the chute 11 can be L-shaped or I-shaped, and the edge of the sliding plate 4 can correspond to the cross-section of the chute 11 to prevent the sliding plate 4 from separating from the chute 11 in other directions perpendicular to the sliding direction.

[0039] Please refer to Figure 1 , in some examples, the holding plate 1 further includes a limiting portion 12, the limiting portion 12 is provided at the end of the chute 11 away from the scale plate 2, and one end of the sliding plate 4 abuts against the limiting portion 12. The limiting portion 12 can limit the sliding plate 4 located within the chute 11 to prevent the sliding plate 4 from sliding out of the chute 11, resulting in an obstacle to the depth detection function.

[0040] Please refer to Figure 1 , in some examples, the limiting portion 12 can be a limiting protrusion, or a flexible layer or other structures, as long as the limiting portion 12 can abut against the sliding plate 4.

[0041] Alternatively, the limiting portion 12 can also be formed by the remaining part after the chute 11 is opened on the holding plate 1, and the sliding plate 4 is abutted by this part.

[0042] Please refer to Figure 1 , in some examples, a first limiting protrusion 41 is provided on the sliding plate 4. The first limiting protrusion 41 is arranged on the side of the sliding plate 4 away from the scale plate 2 and on the side surface of the sliding plate 4 away from the holding plate 1. The first limiting protrusion 41 is arranged on the plate surface of the sliding plate 4. The user can conveniently slide the sliding plate 4 in and out by holding the first limiting protrusion 41, thus facilitating the depth detection work of the crack.

[0043] Exemplarily, the first limiting protrusion 41 can be a grip. The first limiting protrusion 41 can be cylindrical, prismatic or U-shaped, and can all achieve its fixing effect.

[0044] In some examples, the first limiting protrusion 41 can be made of wood, plastic or metal. The first limiting protrusion 41 can be adhesively connected, snap-connected or thread-connected to the sliding plate 4.

[0045] Please refer to Figure 1 , in some examples, the holding plate 1 further includes a second limiting protrusion 13 and a limiting post 5. Two second limiting protrusions 13 are provided. The two second limiting protrusions 13 are arranged on the holding plate 1 and on both sides of the sliding groove 11. The second limiting protrusion 13 is arranged between the first limiting protrusion 41 and the scale plate 2. Along the length direction of the holding plate 1, there is a gap between the second limiting protrusion 13 and the first limiting protrusion 41. The limiting post 5 abuts between the first limiting protrusion 41 and the two second limiting protrusions 13.

[0046] The second limiting protrusion 13 and the first limiting protrusion 41 can cooperate with the limiting post 5 to fix the sliding plate 4. When detecting the crack width through the width detection component 3, the sliding plate 4 can be fixed, and the inspection work of the width and length of the crack detection ruler can be ensured.

[0047] Please refer to Figure 1 , in some examples, the second limiting protrusion 13 can be cylindrical, prismatic or other L-shaped platforms, so as to meet the limiting effect.

[0048] In some examples, along the sliding direction of the sliding plate 4, the positions of the two second limiting protrusions 13 can be flush, so as to facilitate the corresponding limiting effect.

[0049] At the same time, the limiting post 5 can be cylindrical, prismatic or other irregular columnar structures, as long as it can achieve the limiting effect.

[0050] Please refer to Figure 1, Exemplarily, the connection between the limiting post 5 and the first limiting protrusion 41 and the two second limiting protrusions 13 can be achieved by sliding along the axial direction of the limiting post 5, or it can also be set in other directions to achieve the limiting effect.

[0051] In some examples, the number of the second limiting protrusions 13 can be set to two, or can also be set to four or other numbers.

[0052] Please refer to Figure 2 , In some examples, arc-shaped grooves 131 are provided on both the first limiting protrusion 41 and the two second limiting protrusions 13, and an arc surface 51 is provided on the outer ring wall of the limiting post 5, and the outer ring wall of the limiting post 5 abuts against the inner wall of the arc-shaped groove 131. The arc-shaped groove 131 and the arc surface 51 on the outer ring wall of the limiting post 5 can act together to make the limiting post 5 have a more stable limiting effect.

[0053] Exemplarily, the arc-shaped groove 131 can be circular arc-shaped, or can also be other curved surfaces, as long as it can prevent the limiting post 5 from detaching from the first limiting protrusion 41 and the second limiting protrusion 13 along the direction away from the sliding plate 4, so that the limiting post 5 can provide a stable limiting effect.

[0054] Please return to refer to Figure 1 , In some examples, the construction engineering concrete crack detection ruler further includes an elastic layer 42, and the elastic layer 42 is arranged at the end of the sliding plate 4 that can slide out of the sliding groove 11. The elastic layer 42 can facilitate the abutment between the sliding plate 4 and the deepest part of the crack. When the sliding plate 4 impacts the inner wall of the crack, it can be buffered by the elastic layer 42, thereby protecting the sliding plate 4 and improving the service life of the sliding plate 4.

[0055] In some examples, the elastic layer 42 can be a foam layer, or can also be a rubber layer or a soft plastic layer. The elastic layer 42 can be adhesively bonded or snap-fitted with the sliding plate 4.

[0056] Please refer to Figure 1 , In some examples, at one end of the sliding plate 4 that slides out of the sliding groove 11, along the direction in which the sliding plate 4 slides out of the sliding groove 11, the cross-sectional area of the sliding plate 4 gradually decreases; the elastic layer 42 is arranged at the end of the sliding plate 4 that slides out of the sliding groove 11. The gradually decreasing cross-section of the end of the sliding plate 4 can reduce the volume of the end of the sliding plate 4, and further facilitate the sliding plate 4 to slide into a narrower gap.

[0057] In some examples, the end of the sliding plate 4 can be conical, and specifically it can be conical, prismatic or frustum-shaped.

[0058] Please refer to Figure 1, in some examples, the construction project concrete crack detection ruler further includes an abutting portion 21, the abutting portion 21 is disposed on a side of the scale plate 2 away from the holding plate 1, and the abutting portion 21 is used to abut against the wall surface of the crack to be measured. The abutting portion 21 can abut against the wall where the crack to be detected is located, so that the depth detection work of the crack is more stable.

[0059] Exemplarily, the abutting portion 21 can be a wear-resistant layer, such as formed by a frosted plate, a plastic plate or other plates. The bottom surface of the abutting portion 21 can be a flat surface, and at the same time, the abutting portion 21 and the scale plate 2 can be integrally formed, or can also be adhesively connected, welded, clamped or screwed.

[0060] Please refer to Figure 1 , in some examples, a sliding hole 22 is provided on the back surface of the scale plate 2. The sliding hole 22 communicates with the sliding groove 11, and the sliding hole 22 is opened along the sliding direction of the sliding plate 4. The sliding plate 4 is received in the sliding hole 22. The sliding hole 22 can prevent the sliding plate 4 from interfering with the scale plate 2 when sliding out, so that the sliding of the sliding plate 4 is smoother.

[0061] Please refer to Figure 1 , in some examples, the sliding hole 22 can be a square hole, or can also be a special-shaped hole, as long as it can realize the smooth sliding of the sliding plate 4.

[0062] In the description of this specification, specific features, structures, materials or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0063] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A construction engineering concrete crack detection ruler, characterized in that: include: A holding plate, one side of which is provided with a slide groove, and the inner wall of the slide groove is marked with scales along the length direction of the holding plate; A scale plate is fixedly arranged at one end of the holding plate, and a wall surface of one side of the scale plate is marked with scales along the length direction of the scale plate, and the length direction of the scale plate is perpendicular to the length direction of the holding plate; A width detection component is arranged on the scale plate, and the width detection component is used to detect the length and width of the crack; A sliding plate is slidably arranged in the sliding groove, the sliding groove passes through one end portion of the holding plate close to the scale plate, the sliding plate can slide along the length direction of the holding plate and can at least partially slide out of the holding plate, and the length of the sliding plate is less than the length of the sliding groove.

2. The construction engineering concrete crack detection ruler according to claim 1 is characterized in that: The holding plate further comprises a limiting portion, wherein the limiting portion is arranged at an end of the slide groove away from the scale plate, and one end of the sliding plate abuts against the limiting portion.

3. The construction engineering concrete crack detection ruler according to claim 1 is characterized in that: The sliding plate is provided with a first limiting protrusion, the first limiting protrusion is provided on a side of the sliding plate away from the scale plate, and the first limiting protrusion is provided on a side of the sliding plate away from the holding plate.

4. The construction engineering concrete crack detection ruler according to claim 3 is characterized in that: The holding plate further includes a second limiting protrusion and a limiting column, the second limiting protrusion is provided in two pieces, the two second limiting protrusions are provided on the holding plate, and the two second limiting protrusions are provided on both sides of the slide groove; The second limiting protrusion is arranged between the first limiting protrusion and the scale plate, and a gap is arranged between the second limiting protrusion and the first limiting protrusion along the length direction of the holding plate; The limiting column abuts between the first limiting protrusion and the two second limiting protrusions.

5. The construction engineering concrete crack detection ruler according to claim 4 is characterized in that: The first limiting protrusion and the two second limiting protrusions are both provided with an arc groove, the outer ring wall of the limiting column is provided with an arc surface, and the outer ring wall of the limiting column abuts against the inner wall of the arc groove.

6. The construction engineering concrete crack detection ruler according to any one of claims 1 to 5, characterized in that: The construction engineering concrete crack detection ruler further comprises an elastic layer, and the elastic layer is arranged at the end of the sliding plate that can slide out of the sliding groove.

7. The construction engineering concrete crack detection ruler according to claim 6, characterized in that: At one end of the sliding plate sliding out of the sliding groove, the cross-sectional area of ​​the sliding plate gradually decreases along the direction in which the sliding plate slides out of the sliding groove; The elastic layer is arranged at the end of the sliding plate sliding out of the sliding groove.

8. The construction engineering concrete crack detection ruler according to any one of claims 1 to 5, characterized in that: The construction engineering concrete crack detection ruler further comprises an abutment portion, which is arranged on a side of the scale plate away from the holding plate, and is used to abut against the wall surface of the crack to be measured.

9. The construction engineering concrete crack detection ruler according to claim 1, characterized in that: A sliding hole is arranged on the back of the scale plate, the sliding hole is communicated with the sliding groove, the sliding hole is opened along the sliding direction of the sliding plate, and the sliding plate is accommodated in the sliding hole.

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