Caliper gauge

Abstract

The utility model provides a caliper gauge, and relates to the technical field of measuring instruments. The caliper gauge comprises a caliper gauge body, a fixed measuring jaw connected with the caliper gauge body, a movable measuring jaw rotationally connected with the caliper gauge body, and a pressing lever comprising a pressing part, a rotating part and a protruding part. The rotating part is rotationally connected with the caliper gauge body, the rotating axis of the rotating part does not coincide with the rotating axis of the movable measuring jaw, the pressing part and the protruding part are connected with the rotating part, the protruding part abuts against the movable measuring jaw, and the protruding part is used for driving the movable measuring jaw to rotate relative to the caliper gauge body. According to the caliper gauge provided by the invention, the movable measuring jaw is driven to rotate by utilizing the lever principle, so that the variation amplitude of pressing force can be reduced, the pressing hand feeling is optimized, the movable measuring jaw and the fixed measuring jaw can be in smooth contact with the surface of an object to be measured, and the stability of a measured value is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring instruments, in particular to a snap gauge. BACKGROUND

[0002] The information disclosed in this Background section is only for the purpose of enhancing the understanding of the general background of the present disclosure and does not necessarily constitute an admission that the information forms part of the prior art.

[0003] The snap gauge is a commonly used measuring instrument for measuring the size of an object, which uses the distance between the claws to reflect the size of the object to be measured. In the existing snap gauge, the pressing piece is integrally formed with the movable measuring claw, and the change range of the pressing force is large when pressing, which causes the measuring claw to quickly contact the surface of the object to be measured during the measurement process, thereby affecting the stability of the measured value. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a snap gauge, which aims to solve the technical problem that the change range of the pressing force is large when the snap gauge is used, thereby affecting the stability of the measured value.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] The embodiment of the present application provides a snap gauge, which comprises:

[0007] a snap gauge body;

[0008] a fixed measuring claw connected with the snap gauge body;

[0009] a movable measuring claw rotationally connected with the snap gauge body;

[0010] a pressing lever comprising a pressing portion, a rotating portion and a protruding portion, the rotating portion is rotationally connected with the snap gauge body, the rotating axis of the rotating portion and the rotating axis of the movable measuring claw do not coincide, the pressing portion and the protruding portion are connected with the rotating portion, the protruding portion abuts against the movable measuring claw, and the protruding portion is used to drive the movable measuring claw to rotate relative to the snap gauge body.

[0011] In one of the embodiments, a part of the movable measuring claw is recessed to form a recessed portion in the direction close to the fixed measuring claw, and the protruding portion abuts against the recessed portion.

[0012] In one of the embodiments, the recessed portion is arranged close to the rotating axis of the movable measuring claw.

[0013] In one of the embodiments, the protruding portion is in line contact or surface contact with the recessed portion.

[0014] In one of the embodiments, the recess is an arc-shaped recess, and the protrusion is an arc-shaped protrusion.

[0015] In one of the embodiments, the fixed jaw includes a first jaw body and a first measuring head, a part of the first jaw body is connected with the caliper body, and the first measuring head is detachably connected with an end of the first jaw body away from the caliper body; the movable jaw includes a second jaw body and a second measuring head, a part of the second jaw body is rotationally connected with the caliper body and abuts against the protrusion, and the second measuring head is detachably connected with an end of the second jaw body away from the caliper body.

[0016] In one of the embodiments, the caliper is an external caliper, and the first measuring head and the second measuring head are arranged oppositely; or, the caliper is an internal caliper, and the first measuring head and the second measuring head are arranged oppositely.

[0017] In one of the embodiments, the pressing portion includes a first pressing segment and a second pressing segment, the second pressing segment is connected between the first pressing segment and the rotating portion, and an angle formed between a side of the first pressing segment away from the fixed jaw and a side of the second pressing segment away from the fixed jaw is α, which satisfies: 90° < α < 180°.

[0018] In one of the embodiments, the pressing portion, the rotating portion and the protrusion are integrally formed into the pressing lever.

[0019] In one of the embodiments, the caliper body defines a receiving space, the part of the fixed jaw connected with the caliper body is accommodated in the receiving space, the part of the movable jaw rotationally connected with the caliper body is accommodated in the receiving space, and the rotating portion is accommodated in the receiving space; the caliper body is provided with an avoiding opening in communication with the receiving space, and the pressing portion is arranged through the avoiding opening.

[0020] The application has the following beneficial effects:

[0021] The caliper provided by the application has the following advantages: the rotating portion of the pressing lever is rotationally connected with the caliper body, the rotating axis of the rotating portion and the rotating axis of the movable jaw do not coincide, and the protrusion of the pressing lever abuts against the movable jaw, so that the movable jaw is driven to rotate by the lever principle, which can reduce the variation range of the pressing force, optimize the pressing feeling, and make the movable jaw and the fixed jaw gently contact the surface of the object to be measured, thereby improving the stability of the measured value.

[0022] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are referred to. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0024] Figure 1 A perspective view of a caliper gauge in an embodiment of the present application is shown;

[0025] Figure 2 An enlarged view of region A in the embodiment of the present application is shown; Figure 1

[0026] Figure 3 Another perspective view of a caliper gauge in an embodiment of the present application is shown;

[0027] Figure 4 An enlarged view of region B in the embodiment of the present application is shown. Figure 3

[0028] Explanation of main element symbols:

[0029] 100-caliper gauge; 110-caliper gauge body; 111-accommodation space; 120-fixed measuring claw; 121-first claw body; 122-first measuring head; 130-movable measuring claw; 131-second claw body; 1311-recess; 132-second measuring head; 140-pressing lever; 141-pressing portion; 1411-first pressing section; 1412-second pressing section; 142-rotating portion; 143-protruding portion; 151-elastic member; 152-spherical lever; 153-moving fence base; 154-moving fence rod. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0031] ​​In the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, unless explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first feature and the second feature, or indirect contact between the first feature and the second feature through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or simply indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or simply indicate that the first feature is lower than the second feature in horizontal height.

[0033] In the description of the present application, the terms "first", "second", etc. are used to distinguish different objects and cannot be understood as indicating or implying a specific order or primary and secondary relationship, or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0034] In the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the description of the present application, the term "and / or" indicates that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / ", in general, indicates that the front and rear associated objects are in an "or" relationship.

[0036] In the description of the present application, "parallel" not only includes the case of absolute parallel, but also includes the case of approximate parallel which is generally recognized in engineering; at the same time, "perpendicular" not only includes the case of absolute perpendicular, but also includes the case of approximate perpendicular which is generally recognized in engineering. Exemplarily, the included angle between two directions is 80°-90°, and the two directions can be considered as perpendicular; the included angle between two directions is 0°-10°, and the two directions can be considered as parallel.

[0037] A snap gauge is a commonly used measuring instrument for measuring the size of an object, which uses the distance between the jaws to reflect the size of the object to be measured. In the existing snap gauge, the pressing part and the movable jaw are integrally formed, and the change range of the pressing force is large when pressing, which causes the jaw to quickly contact the surface of the object to be measured during the measurement, thereby affecting the stability of the measured value. In addition, the existing snap gauge also has the problems of high manufacturing cost and narrow application range.

[0038] In order to solve the above technical problems, the embodiments of the present application provide a snap gauge, which relates to the technical field of measuring instruments and is mainly used for measuring the size of an object to be measured.

[0039] As shown in Figures 1 to 3 , the snap gauge 100 provided by the present embodiment includes a snap gauge body 110, a fixed jaw 120, a movable jaw 130, and a pressing lever 140 (in order to facilitate the display of the internal structure, Figure 1 and Figure 3 only part of the structure of the snap gauge body 110 is shown in the drawings).

[0040] The fixed jaw 120 is connected with the snap gauge body 110; the movable jaw 130 is rotationally connected with the snap gauge body 110; the pressing lever 140 includes a pressing part 141, a rotating part 142, and a protruding part 143, the rotating part 142 is rotationally connected with the snap gauge body 110, the rotating axis of the rotating part 142 and the rotating axis of the movable jaw 130 do not coincide, the pressing part 141 and the protruding part 143 are connected with the rotating part 142, the protruding part 143 abuts against the movable jaw 130, and the protruding part 143 is used to drive the movable jaw 130 to rotate relative to the snap gauge body 110.

[0041] It should be noted that "the fixed jaw 120 is connected with the snap gauge body 110" can be understood as: the fixed jaw 120 cannot rotate relative to the snap gauge body 110, that is, the relative position of the fixed jaw 120 and the snap gauge body 110 remains unchanged. Exemplarily, the fixed jaw 120 can be screw-connected, clamped, welded, or connected with a quick-release part with the snap gauge body 110, which is not specifically limited here.

[0042] It should be noted that when the measuring personnel holds the caliper 100 and presses the pressing part 141, the pressing part 141 drives the rotating part 142 to rotate relative to the caliper body 110, so that the protruding part 143 drives the movable gage 130 to rotate relative to the caliper body 110 in a direction away from the fixed gage 120, so that a space for placing the object to be measured can be formed between the fixed gage 120 and the movable gage 130.

[0043] It can be understood that the caliper 100 provided by the embodiment realizes the rotation of the movable gage 130 by the lever principle through the arrangement of the pressing lever 140, the rotating part 142 of the pressing lever 140 is rotationally connected with the caliper body 110, the rotating axis of the rotating part 142 does not coincide with the rotating axis of the movable gage 130, and the protruding part 143 of the pressing lever 140 is in abutment with the movable gage 130, so that the variation range of the pressing force (for example, the variation range is reduced from 5N-10N to 6N-8N) can be reduced, the pressing feeling is optimized, the movable gage 130 and the fixed gage 120 can gently contact the surface of the object to be measured, and the stability of the measured value is improved.

[0044] As shown in Figure 1 and Figure 2 , in one embodiment, a part of the movable gage 130 is recessed to form a recessed part 1311 in a direction close to the fixed gage 120, and the protruding part 143 is in abutment with the recessed part 1311.

[0045] It can be understood that through the arrangement of the recessed part 1311, the variation range of the pressing force can be further reduced, the pressing feeling is optimized, and the movable gage 130 and the fixed gage 120 can more gently contact the surface of the object to be measured.

[0046] Further, the recessed part 1311 is arranged close to the rotating axis of the movable gage 130. In this way, the lever arm can be shortened, so that the variation range of the pressing force can be further reduced, and the pressing feeling is optimized.

[0047] Further, the protruding part 143 is in line contact or surface contact with the recessed part 1311.

[0048] It can be understood that compared with point contact, line contact and surface contact have higher stability, so that the protruding part 143 can more stably drive the movable gage 130 to rotate relative to the caliper body 110, and the stability of the measured value is improved.

[0049] As shown in Figure 2 and Figure 4 , further, the recessed part 1311 is an arc-shaped recessed part, and the protruding part 143 is an arc-shaped protruding part.

[0050] It can be understood that the arc-shaped protrusion 143 is in contact with the arc-shaped recess 1311, which can further improve the stability of the transmission process and improve the smoothness of the transmission process, thereby facilitating the improvement of the stability of the measured value of the snap gauge 100.

[0051] As shown in Figure 1 and Figure 3 In one embodiment, the fixed amount claw 120 includes a first claw body 121 and a first probe 122, a part of the first claw body 121 is connected with the snap gauge body 110, and the first probe 122 is detachably connected with the end of the first claw body 121 away from the snap gauge body 110, and the movable amount claw 130 includes a second claw body 131 and a second probe 132, a part of the second claw body 131 is rotatably connected with the snap gauge body 110 and abuts against the protrusion 143, and the second probe 132 is detachably connected with the end of the second claw body 131 away from the snap gauge body 110.

[0052] It should be noted that "a part of the second claw body 131 is rotatably connected with the snap gauge body 110 and abuts against the protrusion 143" means that a part of the second claw body 131 is rotatably connected with the snap gauge body 110, and the part of the second claw body 131 rotatably connected with the snap gauge body 110 abuts against the protrusion 143.

[0053] Exemplarily, the above-mentioned "detachable connection" can be screw connection, clamping, quick release connection, interference fit connection, etc., which is not specifically limited here.

[0054] It can be understood that since the first probe 122 is detachably connected with the end of the first claw body 121 away from the snap gauge body 110, and the second probe 132 is detachably connected with the end of the second claw body 131 away from the snap gauge body 110, it is convenient to replace the first probe 122 and the second probe 132 separately, so that high-hardness, high-wear-resistance and high-corrosion-resistance materials (such as tungsten carbide composite material, high-manganese alloy, etc.) can be selected for the first probe 122 and / or the second probe 132, without the need to replace the entire fixed amount claw 120 and / or the movable amount claw 130 with the above-mentioned high requirement materials, thereby reducing the manufacturing cost and process difficulty. At the same time, the design of detachable connection also facilitates the replacement of the first probe 122 and the second probe 132 for different purposes, so that the use range of the snap gauge 100 is wider.

[0055] Further, the snap gauge 100 is an external snap gauge, and the first probe 122 and the second probe 132 are arranged opposite to each other; or, the snap gauge 100 is an internal snap gauge, and the first probe 122 and the second probe 132 are arranged opposite to each other. In other words, the snap gauge 100 provided in the embodiment can be an external snap gauge or an internal snap gauge, that is, the above-mentioned lever design is not only applicable to the external snap gauge as shown in Figure 1 and Figure 3The displayed outer caliper makes the measured value of the outer caliper more stable, and is also applicable to the inner caliper, so that the measured value of the inner caliper is more stable, and the applicable scenarios of the lever design are not specifically limited here.

[0056] It should be noted that the significant feature of the outer caliper is that the first probe 122 and the second probe 132 are arranged opposite to each other, so as to measure the outer diameter, width or external size of the object to be measured. The significant feature of the inner caliper is that the first probe 122 and the second probe 132 are arranged opposite to each other, so as to measure the inner diameter, hole diameter or internal spacing of the object to be measured.

[0057] As shown in Figure 1 and Figure 2 In one embodiment, the pressing part 141 includes a first pressing section 1411 and a second pressing section 1412, the second pressing section 1412 is connected between the first pressing section 1411 and the rotating part 142, and the angle between the side of the first pressing section 1411 away from the fixed jaw 120 and the side of the second pressing section 1412 away from the fixed jaw 120 is α, which satisfies: 90°<α<180°.

[0058] It should be noted that "90°<α<180°" can be understood as: α can be selected as any value between 90° and 180° except 90° and 180°, for example, α can be selected as 91°, 92°, 95°, 98°, 100°, 101°, 104°, 110°, 120°, 134°, 150°, 153°, 160°, 161°, 162°, 165°, 168°, 170°, 171°, 178°, 179°, etc., and the value of α is not specifically limited here.

[0059] It can be understood that by limiting the angle α between the side of the first pressing section 1411 away from the fixed jaw 120 and the side of the second pressing section 1412 away from the fixed jaw 120 to be within the range of 90°-180° (not including 90° and 180°), the hand of the measurer can be limited to a certain extent from slipping off the pressing part 141 during pressing, which facilitates the pressing operation of the measurer and provides a better pressing feeling.

[0060] As shown in Figure 1 and Figure 2As shown in the figure, in one embodiment, the pressing part 141, the rotating part 142 and the protruding part 143 are integrally formed into the pressing lever 140. For example, the pressing part 141, the rotating part 142 and the protruding part 143 are integrally formed into the pressing lever 140 by using injection molding process, wire cutting process, punching process, which can increase the structural strength and stability of the pressing lever 140, and save the assembly process and the use of assembly parts, thereby reducing the manufacturing cost of the pressing lever 140.

[0061] In another embodiment, the pressing part 141, the rotating part 142 and the protruding part 143 can also be assembled into the pressing lever 140 by using parts. For example, the pressing part 141 and the rotating part 142, and the protruding part 143 and the rotating part 142 are assembled by using screws, buckles, pins and the like.

[0062] As shown in the figure, Figure 1 and Figure 3 In one embodiment, the caliper body 110 defines a receiving space 111, the part of the fixed measuring claw 120 connected with the caliper body 110 is received in the receiving space 111, the part of the movable measuring claw 130 rotationally connected with the caliper body 110 is received in the receiving space 111, the rotating part 142 is received in the receiving space 111, the caliper body 110 is provided with an avoiding opening in communication with the receiving space 111, and the pressing part 141 is arranged through the avoiding opening.

[0063] It should be noted that the caliper body 110 protects the movable measuring claw 130, the fixed measuring claw 120, the rotating part 142 and the protruding part 143 through the receiving space 111, and avoids the pressing part 141 through the avoiding opening, so as to facilitate the rotation of the pressing lever 140 relative to the caliper body 110.

[0064] It can be understood that the caliper 100 provided in the embodiment is arranged by using the pressing lever 140, the pressing part 141 of the pressing lever 140 is arranged through the avoiding opening, the rotating part 142 of the pressing lever 140 is rotationally connected with the caliper body 110, the rotating axis of the rotating part 142 and the rotating axis of the movable measuring claw 130 do not coincide, the protruding part 143 of the pressing lever 140 abuts against the movable measuring claw 130, thereby realizing the rotation of the movable measuring claw 130 by using the lever principle. This not only can improve the stability of the measured value, but also can reduce the rotation range of the parts in the receiving space 111, save and optimize the space, thereby facilitating the reduction of the opening range of the avoiding opening, and enabling the caliper body 110 to better protect the parts, thereby increasing the protection level of the caliper 100.

[0065] As shown in the figure, Figure 1 and Figure 3It is to be noted that the caliper 100 can further include a resilient member 151 (e.g., a resilient telescopic rod, a spring, a resilient sheet, etc.), a spherical lever 152, a movable rack seat 153, a movable rack rod 154, a movable rack scale, a fixed rack scale, and a display screen. The resilient member 151, the spherical lever 152, the movable rack seat 153, and the movable rack rod 154 are located in the accommodation space 111. The movable rack rod 154, the fixed rack scale, and the display screen are connected to the caliper body 110. The movable rack seat 153 is slidably sleeved on the movable rack rod 154. The movable rack scale is arranged on the movable rack seat 153 and abuts against the fixed rack scale. The rod body of the spherical lever 152 is connected to the end of the second jaw body 131 away from the second probe 132. The spherical head of the spherical lever 152 is connected to the movable rack seat 153 and used to drive the movable rack seat 153 to slide along the movable rack rod 154. One end of the resilient member 151 is connected to the caliper body 110. The other end of the resilient member 151 is rotatably connected to the rod body of the spherical lever 152. The resilient member 151 is used to drive the movable rack seat 153 to rotate and reset through the spherical lever 152, i.e., to drive the movable rack seat 130 to rotate relative to the caliper body 110 in the direction of approaching the fixed rack 120.

[0066] In summary, when the caliper 100 provided in the present embodiment is used, the measurement personnel hold the caliper body 110 and the pressing portion 141 with hands, press the pressing portion 141, drive the movable rack 130 to rotate relative to the caliper body 110 in the direction away from the fixed rack 120, place the object to be measured between the fixed rack 120 and the movable rack 130, and gradually release the pressing portion 141. Under the elastic force of the resilient member 151, the second probe 132 gradually approaches the first probe 122 until the two probes contact the surface of the object to be measured. At the same time, the spherical lever 152 rotates about the rotation axis of the movable rack 130, drives the movable rack seat 153 to slide along the movable rack rod 154, and makes the movable rack scale and the fixed rack scale keep relative parallel displacement (the movable rack scale moves and the fixed rack scale keeps still). The relative displacement is converted into a digital signal by the capacitive displacement principle and displayed on the display screen. The measurement value can be read through the display screen.

[0067] In the description of the present specification, the description of the terms "one embodiment", "some embodiments”, "an example”, "a specific example”, or "some examples” etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present specification and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0068] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A snap gauge characterized in that, The application relates to a caliper gauge, which comprises a caliper gauge body, a fixed measuring claw connected with the caliper gauge body, a movable measuring claw rotationally connected with the caliper gauge body, a pressing lever comprising a pressing part, a rotating part and a protruding part, the rotating part is rotationally connected with the caliper gauge body, the rotating axis of the rotating part and the rotating axis of the movable measuring claw do not coincide, the pressing part and the protruding part are connected with the rotating part, the protruding part is in abutment with the movable measuring claw, and the protruding part is used for driving the movable measuring claw to rotate relative to the caliper gauge body. Part of the movable measuring claw is recessed to form a recessed part in the direction close to the fixed measuring claw, and the protruding part is in abutment with the recessed part. The recessed part is arranged close to the rotating axis of the movable measuring claw. The protruding part is in linear contact or surface contact with the recessed part. The recessed part is an arc-shaped recessed part, and the protruding part is an arc-shaped protruding part.

2. The caliper of claim 1, wherein, The fixed measuring claw comprises a first claw body and a first measuring head, part of the first claw body is connected with the caliper gauge body, the first measuring head is detachably connected with one end of the first claw body away from the caliper gauge body, the movable measuring claw comprises a second claw body and a second measuring head, part of the second claw body is rotationally connected with the caliper gauge body and is in abutment with the protruding part, and the second measuring head is detachably connected with one end of the second claw body away from the caliper gauge body.

3. The caliper of claim 2, wherein, The caliper gauge is an external caliper gauge, and the first measuring head and the second measuring head are arranged opposite to each other; or the caliper gauge is an internal caliper gauge, and the first measuring head and the second measuring head are arranged opposite to each other.

4. The caliper of claim 2, wherein, The pressing part comprises a first pressing section and a second pressing section, the second pressing section is connected between the first pressing section and the rotating part, the angle between one side of the first pressing section away from the fixed measuring claw and one side of the second pressing section away from the fixed measuring claw is alpha, and 90 DEG < alpha < 180 DEG is met.

5. The caliper of claim 4, wherein, The pressing part, the rotating part and the protruding part are integrally formed to make the pressing lever.

6. The caliper of any one of claims 1 to 5, wherein, The caliper gauge body defines an accommodation space, the part of the fixed measuring claw connected with the caliper gauge body is accommodated in the accommodation space, the part of the movable measuring claw rotationally connected with the caliper gauge body is accommodated in the accommodation space, the rotating part is accommodated in the accommodation space, the caliper gauge body is provided with an avoiding opening in communication with the accommodation space, and the pressing part is arranged through the avoiding opening.

7. The caliper of claim 6, wherein, ​ 8. The caliper of any one of claims 1 to 5, wherein, ​ 9. The caliper of any one of claims 1 to 5, wherein, ​ 10. The caliper of any one of claims 1 to 5, wherein, ​

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