CN211903959U - Vernier caliper with set square - Google Patents
Vernier caliper with set square Download PDFInfo
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- CN211903959U CN211903959U CN202020928147.8U CN202020928147U CN211903959U CN 211903959 U CN211903959 U CN 211903959U CN 202020928147 U CN202020928147 U CN 202020928147U CN 211903959 U CN211903959 U CN 211903959U
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Abstract
The utility model discloses a set square slide caliper relates to measuring equipment technical field, and the main objective provides a set square slide caliper that can improve the measuring accuracy. The utility model discloses a main technical scheme does: a set square vernier caliper comprising: the set square comprises a set square body, a first right-angle side square and a second right-angle side square, wherein one end side of the first right-angle side square is provided with a first vernier; the first movable ruler comprises a sliding part, an extension ruler and a second vernier, the sliding part is sleeved on the first right-angle side ruler and is connected to the first right-angle side ruler in a sliding mode, one end of the sliding part is provided with a first side part and a second side part, one end of the extension ruler is fixedly connected to the first side part, the other end of the extension ruler extends towards the direction of the bevel side ruler, and one end of the second vernier is fixedly connected to the second side part; the second removes the chi, and the second removes the chi cover on the hypotenuse chi to sliding connection is in the hypotenuse chi the utility model discloses mainly used measures.
Description
Technical Field
The utility model relates to a measuring equipment technical field especially relates to a set square slide caliper.
Background
The vernier caliper is widely applied to the measurement field as an economical and practical measuring tool, and comprises a main ruler and a sliding vernier, wherein a spring piece is arranged between the vernier and a ruler body of the main ruler, the vernier is tightly close to the ruler body by utilizing the elasticity of the spring piece, and a fastening screw is arranged at the upper part of the vernier, so that the vernier can be fixed at any position on the ruler body. The ruler body and the vernier are provided with measuring claws, the width of the groove and the inner diameter of the pipe can be measured by utilizing the inner measuring claw, and the thickness of the part and the outer diameter of the pipe can be measured by utilizing the outer measuring claw.
The reading principle is that the difference of unit length of the main scale and the vernier is used for reading, the reading is equal to the reading of the main scale (whole millimeter reading) + n x (n is the alignment of the nth scale line of the vernier with the scale line of the main scale, and x is the accuracy of the vernier), x is equal to 1/m, and m is the graduation of the vernier, namely the full scale reading of the vernier. For example, a 10-division vernier caliper, with an actual length of 9mm, each case representing 0.9mm, is 0.1mm different from 1mm of the main scale, so the accuracy is 0.1mm, i.e. x ═ 0.1mm (1/10); considering from the alignment of the vernier scale 0 reticle and a certain reticle of the main scale, moving the vernier scale to the right, when the first reticle is aligned with the main scale reticle, the vernier scale moves to the right by 1 grid difference (0.1 mm), when the second reticle is aligned with the main scale reticle, the vernier scale moves to the right by 2 grid difference (0.1 x 2) mm (0.2 mm), and so on, when the nth reticle is aligned with the main scale reticle, the vernier scale moves to the right by n grid difference (0.1 x n) mm. Therefore, for a vernier caliper with 10 divisions, the reading resolution of the main scale is 0.1mm, and for other vernier calipers, if the measurement accuracy of the main scale is further improved, measurement needs to be performed by using more expensive measurement equipment.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a set square vernier caliper, which mainly aims to provide a set square vernier caliper capable of improving the measurement accuracy.
In order to achieve the above object, the utility model mainly provides the following technical scheme:
on the one hand, the embodiment of the utility model provides a set square slide caliper, include:
the set square comprises a set square body, a first square body and a second square body, wherein the set square body comprises a first right-angle side square, a second right-angle side square and a bevel side square, and a first vernier is arranged on one end side of the first right-angle side square;
the first movable ruler comprises a sliding part, an extension ruler and a second vernier, the sliding part is sleeved on the first right-angle side ruler and is connected to the first right-angle side ruler in a sliding mode, one end of the sliding part is provided with a first side part and a second side part, one end of the extension ruler is fixedly connected to the first side part, the other end of the extension ruler extends towards the direction of the oblique side ruler, and one end of the second vernier is fixedly connected to the second side part;
and the second movable ruler is sleeved on the bevel edge ruler and is connected to the bevel edge ruler in a sliding manner.
Furthermore, one side of the extension ruler is a first measuring edge, one side of the second vernier is a second measuring edge, and the first measuring edge and the second measuring edge are overlapped with each other.
Further, the bevel rule has a first empty slot, and the other end of the extension rule passes through the first empty slot.
Further, the extension ruler, the first vernier and the second vernier are located in the same plane.
Further, the extension ruler, the first vernier and the second vernier are perpendicular to the first right-angle side ruler respectively.
Further, the fixed part cover is in extend on the chi, the fixed part is close to one side of hypotenuse chi is first hypotenuse, the inclination of first hypotenuse with the inclination of hypotenuse chi is the same.
Further, a fixing knob including a first fixing knob and a second fixing knob is provided, the first fixing knob is provided on the sliding member, and the second fixing knob is provided on the second movable ruler.
Further, the fixing knob further comprises a third fixing knob, and the third fixing knob is arranged on the fixing part.
Compared with the prior art, the utility model discloses following technological effect has:
in the technical scheme provided by the embodiment of the utility model, the set square body comprises a first right-angle side square, a second right-angle side square and a bevel side square, and one end side of the first right-angle side square is provided with a first vernier; the first movable ruler comprises a sliding part, an extension ruler and a second vernier, the sliding part is sleeved on the first right-angle side ruler and is connected to the first right-angle side ruler in a sliding mode, one end of the sliding part is provided with a first side part and a second side part, one end of the extension ruler is fixedly connected to the first side part, the other end of the extension ruler extends towards the direction of the bevel side ruler, and one end of the second vernier is fixedly connected to the second side part; the second movable scale is sleeved on the inclined-edge scale and is connected to the inclined-edge scale in a sliding mode, and compared with the prior art, the second movable scale is read by using the difference of unit lengths of the main scale and the vernier scale, wherein the reading is equal to the reading of the main scale (the whole millimeter reading) + n x (n is the alignment of the nth scale line of the vernier scale and the scale line of the main scale, and x is the accuracy of the vernier scale), x is equal to 1/m, and m is the graduation of the vernier scale, namely the full scale reading of the vernier scale. For example, a 10-division vernier caliper, with an actual length of 9mm, each case representing 0.9mm, is 0.1mm different from 1mm of the main scale, so the accuracy is 0.1mm, i.e. x ═ 0.1mm (1/10); considering from the alignment of the vernier scale 0 reticle and a certain reticle of the main scale, moving the vernier scale to the right, when the first reticle is aligned with the main scale reticle, the vernier scale moves to the right by 1 grid difference (0.1 mm), when the second reticle is aligned with the main scale reticle, the vernier scale moves to the right by 2 grid difference (0.1 x 2) mm (0.2 mm), and so on, when the nth reticle is aligned with the main scale reticle, the vernier scale moves to the right by n grid difference (0.1 x n) mm. Therefore, for a vernier caliper with 10 divisions, the reading resolution of a main ruler is 0.1mm, other vernier calipers are the same, if the measurement accuracy of the vernier caliper is further improved, a measurement device with higher price is needed for measurement, in the technical scheme, a right triangle is enclosed by a set square body through a first square ruler, a second square ruler and a bevel ruler, scales are arranged on the bevel ruler, a first vernier is fixedly arranged on one end side of the first square ruler, then a sliding part is sleeved on the first square ruler and is connected with the first square ruler in a sliding manner, one end of the sliding part is provided with a first side part and a second side part, one end of an extension ruler is fixedly connected with the first side part, the other end of the extension ruler extends towards the direction of the bevel ruler, one end of a second vernier is fixedly connected with the second side part, and a second movable ruler is sleeved on the bevel ruler, and the slide member is fixed, so that the extension scale is fixed, at the moment, the scale on the extension scale is read, then an inverse trigonometric sine function value k of alpha is obtained according to the secant trigonometric function, and finally the length D1 of the measured object is calculated, namely the length of the measured object corresponding to the scale on the extension scale can be represented by the reading of the scale on the extension scale, so that the measurement accuracy of the length of the measured object obtained under the same reference condition is improved by (1/k) times, namely the measurement accuracy of the original vernier caliper is improved by (1/k) times on the basis of the accuracy of the original vernier caliper.
Drawings
Fig. 1 is a schematic structural view of a first set square vernier caliper according to an embodiment of the present invention;
fig. 2 is a left side view structural schematic diagram of a first set square vernier caliper according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a second set square vernier caliper according to an embodiment of the present invention;
fig. 4 is a schematic view of a second usage state structure of a set square vernier caliper according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 4, the embodiment of the present invention provides a set square vernier caliper, including:
the set square comprises a set square body, wherein the set square body comprises a first right-angle side square 11, a second right-angle side square 12 and a bevel side square 13, and a first vernier 14 is arranged on one end side of the first right-angle side square 11;
the first movable ruler comprises a sliding part 21, an extension ruler 22 and a second vernier 23, the sliding part 21 is sleeved on the first right-angle side ruler 11 and is connected to the first right-angle side ruler 11 in a sliding mode, one end of the sliding part 21 is provided with a first side part and a second side part, one end of the extension ruler 22 is fixedly connected to the first side part, the other end of the extension ruler extends towards the direction of the inclined side ruler 13, and one end of the second vernier 23 is fixedly connected to the second side part;
and the second moving ruler 3 is sleeved on the bevel edge ruler 13, and is connected with the bevel edge ruler 13 in a sliding mode.
In the technical scheme provided by the embodiment of the utility model, the set square body comprises a first right-angle square 11, a second right-angle square 12 and a bevel square 13, and one end side of the first right-angle square 11 is provided with a first vernier 14; the first movable ruler comprises a sliding part 21, an extension ruler 22 and a second vernier 23, the sliding part 21 is sleeved on the first right-angle ruler 11 and is connected to the first right-angle ruler 11 in a sliding mode, one end of the sliding part 21 is provided with a first side part and a second side part, one end of the extension ruler 22 is fixedly connected to the first side part, the other end of the extension ruler extends towards the direction of the inclined ruler 13, and one end of the second vernier 23 is fixedly connected to the second side part; the second movable scale 3 is fitted over the hypotenuse 13 and slidably connected to the hypotenuse 13, and compared to the prior art, the difference in unit length between the main scale and the vernier is used to read the readings, where the reading is the main scale reading (whole millimeter reading) + n × x (n is the alignment of the nth scale line of the vernier with the main scale line, and x is the accuracy of the vernier), x is 1/m, and m is the scale division of the vernier, i.e. the full scale reading of the vernier. For example, a 10-division vernier caliper, with an actual length of 9mm, each case representing 0.9mm, is 0.1mm different from 1mm of the main scale, so the accuracy is 0.1mm, i.e. x ═ 0.1mm (1/10); considering from the alignment of the vernier scale 0 reticle and a certain reticle of the main scale, moving the vernier scale to the right, when the first reticle is aligned with the main scale reticle, the vernier scale moves to the right by 1 grid difference (0.1 mm), when the second reticle is aligned with the main scale reticle, the vernier scale moves to the right by 2 grid difference (0.1 x 2) mm (0.2 mm), and so on, when the nth reticle is aligned with the main scale reticle, the vernier scale moves to the right by n grid difference (0.1 x n) mm. Therefore, for the vernier caliper with 10 divisions, the reading resolution of the main ruler is 0.1mm, and for the other vernier calipers, similarly, if the measurement accuracy of the vernier caliper is further improved, a more expensive measurement device is required to be used for measurement, in the technical scheme, the set square body forms a right triangle by the first square 11, the second square 12 and the bevel 13, and the bevel 13 is provided with scales, the first vernier 14 is fixedly arranged at one end side of the first square 11, then the sliding part 21 is sleeved on the first square 11 and is connected to the first square 11 in a sliding manner, one end of the sliding part 21 is provided with a first side part and a second side part, one end of the extension ruler 22 is fixedly connected to the first side part, the other end extends towards the bevel 13, one end of the second vernier 23 is fixedly connected to the second side part, the second movable scale 3 is sleeved on the hypotenuse 13 and is connected to the hypotenuse 13 in a sliding manner, when a measured object needs to be measured, the first vernier 14 and the second vernier 23 are clamped on the measured object, then the sliding component 21 is fixed, so that the extension scale 22 is fixed, at this time, the scale on the extension scale 22 is read, then an inverse trigonometric sine function value k of the angle alpha is obtained according to the secant trigonometric function, and finally the length D1 of the measured object is calculated, namely, the length of the measured object corresponding to the scale can be represented by the reading of the scale on the extension scale 22, so that the measurement accuracy of the length of the measured object obtained under the same reference condition is improved by (1/k) times, namely, (1/k) times is improved on the basis of the accuracy of the original vernier caliper.
The shape of the triangular rule body is a right triangle, the triangular rule body comprises a first right angle side rule 11, a second right angle side rule 12 and a hypotenuse rule 13, a first vernier 14 is arranged at one end side of the first right angle side rule 11 to establish a right triangle for an angle alpha, the length of the first right angle side rule 11 is D, the length of the second right angle side rule 12 is H, the length of the hypotenuse rule 13 is R, wherein R is the hypotenuse of angle alpha, H is an adjacent side of angle alpha, and D is an opposite side of angle alpha, scales are arranged on the hypotenuse rule 13, the first vernier 14 is fixed at one end side of the first right angle side rule 11, the first vernier 14 is perpendicular to the first right angle side rule 11, and the first vernier 14, the first right angle side rule 11, the second right angle side rule 12 and the hypotenuse rule 13 are of an integrated structure, so that the service life and the supporting strength of the triangular rule body can be improved; the first moving ruler can slide on the first right angle side ruler 11, the first moving ruler comprises a sliding part 21, an extension ruler 22 and a second vernier 23, the sliding part 21 is sleeved on the first right angle side ruler 11 and is connected with the first right angle side ruler 11 in a sliding mode, one end of the sliding part 21 is provided with a first side part and a second side part, one end of the extension ruler 22 is fixedly connected with the first side part, the other end of the extension ruler 22 extends towards the direction of the bevel side ruler 13, one end of the second vernier 23 is fixedly connected with the second side part, the second vernier 23 and the first vernier 14 are parallel to each other, therefore, the second vernier 23 is also perpendicular to the first right angle side ruler 11, meanwhile, the extension ruler 22 is an extension of the second vernier 23, therefore, the extension ruler 22 is also perpendicular to the first right angle side ruler 11, one side of the extension ruler 22 and one side of the second vernier 23 are positioned on the same straight line, the sliding part 21 is sleeved on the first right angle side ruler 11, can drive second vernier 23 and extension chi 22 simultaneously and remove along the extending direction of first right angle chi 11 for extension chi 22 forms alternately with hypotenuse 13 at the in-process that removes, thereby forms hypotenuse 13 and the reading R1 of second movable ruler 12, according to secant trigonometric function:
wherein r is the hypotenuse of < alpha >, h is the adjacent side of < alpha >, d is the opposite side of < alpha ",
therefore, the following steps are carried out:
when the minimum unit of measurement (resolution) is mm, which is generally 1mm for a common vernier caliper, when the measurement reading of the oblique side r is (m) mm, the length of the opposite side d corresponding to the oblique side r can be expressed as (n) mm, where the relationship between m and n satisfies the formula:
that is, the length of the opposite side D corresponding to the reading of the oblique side r can be represented by the reading of the oblique side r, so that the length D1 of the measured object is calculated by the following formula:
D1＝(R1/k)；
d1 is the length of the measured object, R1 is the readings on the hypotenuse 13 and the second movable scale 12, k is the inverse trigonometric sine function value of α, and finally the length D1 of the measured object is calculated, that is, the length of the measured object corresponding to the reading on the scale 22 can be represented by the reading on the scale on the extension scale, so that the measurement accuracy of the length of the measured object obtained under the same reference condition is improved by (1/k) times, that is, the measurement accuracy of the original vernier caliper is improved by (1/k) times on the basis of the accuracy of the original vernier caliper; the second movable ruler 3 is used for fixing the position of the extension ruler 22, the second movable ruler 3 is sleeved on the bevel edge ruler 13 and is connected to the bevel edge ruler 13 in a sliding mode, after the sliding part 21 is fixed, the position of the extension ruler 22 is kept fixed, at the moment, the second movable ruler 3 is released, the second movable ruler 3 is made to move towards the extension ruler 22 along the direction of the bevel edge ruler 13 until the second movable ruler 3 is attached to the extension ruler 22, then the second movable ruler 3 is fixed, the position between the extension ruler 22 and the second movable ruler 3 is relatively fixed, and therefore the technical effect of preventing the extension ruler 22 from moving is achieved.
It should be noted that the second moving rule 3 has the corresponding graduation m as the vernier of the conventional vernier caliper, and m is the graduation of the second moving rule, i.e. the full scale reading of the vernier, for example, a vernier caliper with 10 divisions, the actual length is 9mm, each case represents 0.9mm, and is different from 1mm of the main rule by 0.1mm, so the accuracy is 0.1mm, i.e. x (1/10) mm is 0.1 mm; considering from the alignment of the vernier scale 0 reticle and a certain reticle of the main scale, moving the vernier scale to the right, when the first reticle is aligned with the main scale reticle, the vernier scale moves to the right by 1 grid difference (0.1 mm), when the second reticle is aligned with the main scale reticle, the vernier scale moves to the right by 2 grid difference (0.1 x 2) mm (0.2 mm), and so on, when the nth reticle is aligned with the main scale reticle, the vernier scale moves to the right by n grid difference (0.1 x n) mm. Thus, for a 10-graduated caliper, the reading resolution of the main scale is 0.1mm, as is the case for other graduated calipers.
Furthermore, one side of the extension rule 22 is a first measuring edge 221, one side of the second cursor 23 is a second measuring edge 231, and the first measuring edge 221 and the second measuring edge 231 are overlapped with each other. In this embodiment, the first movable ruler is further defined, and the extension ruler 22 is an extension of the second cursor 23, so that one side of the second cursor 23 and one side of the extension ruler 22 are overlapped with each other, so that the first measuring edge 221 and the second measuring edge 231 are located in the same plane, and the length of the object to be measured between the first cursor 14 and the second cursor 23 can be accurately reflected on the bevel ruler 13; optionally, the extension rule 22, the first vernier 14 and the second vernier 23 are located in the same plane, which can further improve the accuracy of the triangular vernier caliper.
Further, as shown in fig. 2, the hypotenuse 13 has a first empty groove 131, and the other end of the extension rule 22 passes through the first empty groove 131. In this embodiment, hypotenuse chi 13 has further been injectd, sets up first dead slot 131 in the intermediate position of hypotenuse chi 13, and first dead slot 131 runs through the both sides of hypotenuse chi 13, and extension chi 22 can pass first dead slot 131, and the width of first dead slot 131 slightly is greater than the thickness of extension chi 22 for extension chi 22 can move in first dead slot 131, thereby improves the stability of extension chi 22, and, can conveniently read the scale on hypotenuse chi 13.
Further, as shown in fig. 3 and 4, a fixing part 4 is added, the fixing part 4 is sleeved on the extension ruler 22, one side of the fixing part 4 close to the bevel edge ruler 13 is a first bevel edge, and the inclination angle of the first bevel edge is the same as that of the bevel edge ruler 13. In this embodiment, a fixing component 4 is added, the fixing component 4 is used for further fixing the positions of the second movable ruler 3 and the extension ruler 22, after the second movable ruler 3 and the extension ruler 22 are attached to each other, the fixing component 4 is released, the fixing component 4 slides along the direction of the extension ruler 22 under the action of gravity until the fixing component is attached to the second movable ruler 3, and then the fixing component 4 is fixed, so that the relative positions of the extension ruler 22, the second movable ruler 3 and the fixing component 4 are kept unchanged, thereby facilitating reading by a person, and the second movable ruler 3 and the fixing component 4 slide under the action of gravity, so that the situation that the extension ruler 22 is deformed due to the action force exerted by the person is basically avoided, and therefore, the accuracy of measurement can be improved; optionally, a first magnetic component may be disposed on the first oblique edge of the fixing component 4, a second magnetic component may be disposed on one side of the second movable ruler 3 close to the first oblique edge, and when the fixing component 4 slides along the direction of the extension ruler 22 under the action of gravity, the first magnetic component and the second magnetic component are attached to each other, so as to achieve the technical effect of fixing the extension ruler 22.
Further, as shown in fig. 1 to 4, a fixing knob is added, the fixing knob includes a first fixing knob 51 and a second fixing knob 52, the first fixing knob 51 is disposed on the sliding member 21, and the second fixing knob 52 is disposed on the second moving ruler 3. In this embodiment, a fixing knob is added, the first fixing knob 51 functions to fix the sliding member 21, when the first cursor 14 and the second cursor 23 clamp the object to be measured, the position of the sliding member 21 is also kept fixed, and then the position of the sliding member 21 is fixed by the first fixing knob 51, the first fixing knob 51 includes a first screw fixed to the first rotating member at one end thereof, a first screw hole is provided at a side portion of the sliding member 21, the other end of the first screw is screwed into the first screw hole and abuts against the first square 11, thereby achieving the function of fixing the sliding member 21, the second fixing knob 52 is provided on the second moving rule 3, when the sliding member 21 is fixed, the position of the extending rule 22 is also kept fixed, at this time, the second moving rule 3 is released, so that the second moving rule 3 moves toward the extending rule 22 along the direction of the oblique side 13, until the second movable ruler 3 and the extension ruler 22 are attached to each other, the position of the second movable ruler 3 is fixed through a second fixing knob 52, the second fixing knob 52 comprises a second screw rod and a second rotating part, one end of the second screw rod is fixed on the second rotating part, a second threaded hole is formed in the side part of the second movable ruler 3, the other end of the second screw rod is screwed into the second threaded hole and abuts against the bevel ruler 13, and therefore the technical effect of fixing the second movable ruler 3 is achieved; optionally, the fixing knob further includes a third fixing knob, the third fixing knob is disposed on the fixing part 4, after the second movable ruler 3 is fixed in position, the fixing part 4 is released, the fixing part 4 is moved toward the second movable ruler 3 along the direction of the extension ruler 22 until the fixing part 4 and the second movable ruler 3 are attached to each other, then the fixing part 4 is fixed in position by the third fixing knob, the third fixing knob includes a third screw rod and a third rotating part, one end of the third screw rod is fixed on the third rotating part, a third threaded hole is disposed on a side of the fixing part 4, and the other end of the third screw rod is screwed into the third threaded hole and abuts against the extension ruler 22, so as to achieve the technical effect of fixing the fixing part 4.
For example: establishing a right triangle for an angle alpha, wherein the reading of the angle alpha is 30 degrees, the length of a first right-angle side ruler is D, the length of a second right-angle side ruler is H, and the length of a hypotenuse is R, wherein R is the hypotenuse of the angle alpha, H is the adjacent side of the angle alpha, and D is the opposite side of the angle alpha, and taking a vernier caliper with the graduation of 10 as an example, the minimum measurement unit of the hypotenuse is (0.1) mm; moving the first moving ruler to enable the first vernier and the second vernier to clamp the object to be measured and fix the first moving ruler; moving the second movable ruler to enable the second movable ruler and the extension ruler to be attached to each other, and reading the scales on the bevel edge ruler and the second movable ruler to obtain the R1 of (10.1) mm; calculating the length D1 of the measured object, and the formula is as follows:
D1＝(R1/k)；
d1 is calculated to be (10.05) mm;
it can be seen that the measurement accuracy of the triangular vernier caliper used in the present embodiment is (0.05) mm, and under the same reference condition, the measurement accuracy of the triangular vernier caliper used in the present embodiment is improved by 0.5 times.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A set square vernier caliper, comprising:
the set square comprises a set square body, a first square body and a second square body, wherein the set square body comprises a first right-angle side square, a second right-angle side square and a bevel side square, and a first vernier is arranged on one end side of the first right-angle side square;
the first movable ruler comprises a sliding part, an extension ruler and a second vernier, the sliding part is sleeved on the first right-angle side ruler and is connected to the first right-angle side ruler in a sliding mode, one end of the sliding part is provided with a first side part and a second side part, one end of the extension ruler is fixedly connected to the first side part, the other end of the extension ruler extends towards the direction of the oblique side ruler, and one end of the second vernier is fixedly connected to the second side part;
and the second movable ruler is sleeved on the bevel edge ruler and is connected to the bevel edge ruler in a sliding manner.
2. The square vernier caliper of claim 1,
one side of the extension ruler is a first measuring edge, one side of the second vernier is a second measuring edge, and the first measuring edge and the second measuring edge are overlapped with each other.
3. The square vernier caliper of claim 1,
the bevel edge ruler is provided with a first empty groove, and the other end of the extension ruler penetrates through the first empty groove.
4. The square vernier caliper of claim 2,
the extension ruler, the first vernier and the second vernier are located in the same plane.
5. The square vernier caliper of claim 2,
the extension ruler, the first vernier and the second vernier are perpendicular to the first right-angle side ruler respectively.
6. The square vernier caliper according to any one of claims 1 to 5, further comprising:
the fixing component is sleeved on the extension ruler, one side of the fixing component close to the bevel edge ruler is a first bevel edge, and the inclination angle of the first bevel edge is the same as that of the bevel edge ruler.
7. The square vernier caliper of claim 6, further comprising:
and the fixed knob comprises a first fixed knob and a second fixed knob, the first fixed knob is arranged on the sliding part, and the second fixed knob is arranged on the second movable ruler.
8. The square vernier caliper of claim 7,
the fixing knob further comprises a third fixing knob, and the third fixing knob is arranged on the fixing part.
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| CN202020928147.8U CN211903959U (en) | 2020-05-28 | 2020-05-28 | Vernier caliper with set square |
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| CN202020928147.8U CN211903959U (en) | 2020-05-28 | 2020-05-28 | Vernier caliper with set square |
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| CN211903959U true CN211903959U (en) | 2020-11-10 |
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