CN2620241Y - Vernier caliper for student - Google Patents

Abstract

The utility model discloses a vernier caliper designated for students in various middle school, secondary specialized school and secondary technical school to perform reading practice. The utility model is to convert 10 graduation vernier, 20 graduation vernier and 50 graudation vernier, and international unit and British unit of length on the positive and opposite side of the caliper. The key of the utility model is characterized in that: vernier steel rule at the positive side of the vernier caliper is made symmetrically up and down, the opposite side of the vernier steel rule is provided with a reading window at the middle. The publication of the utility model can make various students practice the application and reading of 10 graduation caliper with 0.1mm precision, 20 graduation caliper with 0.05mm precision, and 50 graduation caliper with 0.02mm. simultaneously the utility model can solve the problem that students in a lot of secondary technical schools often meet the trouble of conversion between the international unit and British unit of length.

Description

Student's vernier caliper

Affiliated technical field

The utility model discloses all kinds of middle schools of a kind of special confession, special secondary school, middle skill school student and carry out student's vernier caliper of reading exercise.

Background technology

As everyone knows, the vernier caliper that the present all kinds of student of secondary school practises using is the slide calliper rule that have only one 50 calibration vernier, and the student that clearly claims in physics teaching in secondary school outline and special secondary school, the middle skill syllabus grasps the correct use of the vernier caliper of 10 calibration, 20 calibration and 50 calibration, because school does not have 10 calibration and 20 calibration vernier calipers, teacher often draws many 10 calibration and 20 calibration vernier calipers on blackboard reading exercise allows the student practise the number reading method of slide calliper rule, the way of this empty talk is unfavorable for the real formation of student experimenting ability.In addition, the student of all kinds of skilled workers schools usually runs into the international unit of length and the problem of English unit's conversion trouble in practice, is easy to because the mistake on calculating causes producing underproof product.

Summary of the invention

Can not be used to practise 10 calibration simultaneously in order to overcome existing vernier caliper, the shortcoming of the reading of the vernier caliper of 20 calibration, and can not realize the international unit of length and the deficiency that English unit quick and precisely converts, the utility model provides a kind of multi-functional student special-purpose vernier caliper, it can make all kinds of middle schools, the student of special secondary school and middle skill school practises 10 calibration simultaneously on slide calliper rule, the use of 20 calibration and 50 calibration vernier calipers and reading, realized simultaneously accuracy be 1/32 inch mile and accuracy be 0.02 millimeter international unit between quick conversion.

The technical scheme that its technical matters that solves the utility model adopts is: the original additional steel disc in top is improved, it is extended slightly, make the size with below vernier steel disc symmetry, and engrave the vernier graduation line of 20 calibration in the above.Original master calibration chi is improved, make the master calibration chi that has only delegation originally become the master calibration chi of two row symmetries up and down.Improve at the back side to original mobile steelframe, a rectangular reading window cuts in central authorities at steelframe, noticing that the marginal portion will resemble is cut into domatic the positive vernier steel disc, so that whether more easily judge the groove of vernier scale aligns with the groove of main scale, engrave the vernier graduation line of 10 calibration above it, thereunder engrave the reading index arrow of English unit.The original main scale back side is improved, and the below engraves the main scale mark of international unit and English unit respectively thereon.

The beneficial effects of the utility model are, it makes the student of schools such as all kinds of middle schools, special secondary school, middle skill practise accuracy simultaneously on a rule is that 10 calibration slide calliper rule, the accuracy of 0.1mm is that the reading and the use of the 20 calibration slide calliper rule of 0.05mm and the 50 calibration slide calliper rule that accuracy is 0.02mm becomes possibility, and the student that its appearance also will solve all kinds of skilled workers schools usually runs into the convert problem of trouble of the international unit of length and English unit in practice.Because the fund input that realization of the present utility model needs seldom, and the demand market of all kinds of middle schools, special secondary school, middle skill school is very big, originally one can only work as a kind of ruler to ruler and uses, and present one can work as four kinds of rulers to ruler and use, price space is very big, therefore of the present utility modelly popularize one and make the investment of manufacturing enterprise obtain abundant economic interests surely, also one make the teaching of all kinds of middle schools, special secondary school, middle skill school receive the teaching efficiency of getting twice the result with half the effort surely simultaneously.

Description of drawings

Fig. 1 is a front of the present utility model schematic diagram.Fig. 2 is a back side of the present utility model schematic diagram.

Fig. 3 is a back side of the present utility model steelframe transformation map.

The vernier of 1.20 calibration among the figure, the vernier of 2.50 calibration, 3. positive international unit master calibration chi, the vernier of 4.10 calibration, 5. English unit's reading index, 6. back side international unit master calibration chi, 7. English unit's master calibration chi, 8. reading window.

Embodiment

Embodiment 1.The original additional steel disc in top is extended slightly, make size with below vernier steel disc symmetry, and engrave the vernier graduation line (1) of 20 calibration in the above, the zero graduation line of noting vernier aligns with the zero graduation line of main scale, the distance of each calibration is 0.095mm on the vernier, and the 20th reticule is just in time alignd with 19mm scale mark on the main scale.The top of existing vernier caliper front main scale is increased delegation's delegation scale mark (3) identical with below main scale scale mark, what obtain when using top vernier (1) reading like this is exactly the data of accuracy as 0.05mm, and what obtain when using following vernier (2) reading is exactly the data of accuracy as 0.02mm.

Whether improve slightly to mobile steelframe at the back side at vernier caliper, opens a window (8) in the middle of making, and notices that the marginal portion will resemble to be cut into domatic the positive vernier steel disc, align with the groove of main scale so that more easily judge the groove of vernier.The top of window engraves the vernier graduation line (4) of 10 calibration, the zero graduation line of vernier aligns with zero graduation line on the main scale, the distance of each calibration is 0.9mm on the vernier, the 10th reticule is just in time alignd with 9mm scale mark on the main scale, the below of window engraves the sign (5) of an arrow as the mile reading in the place of aliging with main scale zero graduation line, to engrave accuracy be 1mm in the top of steel ruler fixed part overleaf again, total length is the scale mark (6) of 125mm, overleaf the bottom of steel ruler fixed part to engrave accuracy be 1/32 inch, total length is 5 inches a main scale mark (7).Like this, obtain when utilizing vernier (4) reading be exactly accuracy be the data of 0.1mm, the accuracy that utilizes sign arrow (5) to read is that the international unit length that 1/32 inch length made in Great Britain and positive accuracy of reading with vernier (2) are 0.02 millimeter has realized quick conversion on the basis of degree of precision.

Embodiment 2.The vernier (1) positive among the embodiment 1 and the vernier (4) at the back side are exchanged.

Claims (3)

1, the student of all kinds of middle schools of a kind of special confession, special secondary school, middle skill school student's vernier caliper of carrying out the reading exercise, it is characterized in that: with the vernier (1) of 20 calibration, the vernier of 50 calibration (2), the vernier of 10 calibration (4), delegation's accuracy is that 1/32 inch, total length are English unit's scale mark (7) of 5 inches, the sign arrow (5) of English unit's reading, and the triplex row accuracy is that 1mm, total length are the tow sides that the main scale mark of 125mm combines in slide calliper rule.

2, student's vernier caliper according to claim 1 is characterized in that: the vernier steel ruler in vernier caliper front is symmetry up and down, and two row accuracy are that 1mm, total length are the main scale mark symmetry up and down of 125mm.

3, student's vernier caliper according to claim 1, it is characterized in that: a rectangular reading window cuts in the central authorities of mobile steelframe overleaf, window is cut into domatic up and down, engraves the vernier (4) of 10 calibration above it, thereunder engraves the sign arrow (5) of English unit's reading.