CN221464511U

CN221464511U - Curve length measuring ruler

Info

Publication number: CN221464511U
Application number: CN202420069799.9U
Authority: CN
Inventors: 李豪; 刘永富
Original assignee: WUXI ELECTRICAL AND HIGHER VOCATIONAL SCHOOLS
Current assignee: WUXI ELECTRICAL AND HIGHER VOCATIONAL SCHOOLS
Priority date: 2024-01-11
Filing date: 2024-01-11
Publication date: 2024-08-02
Anticipated expiration: 2034-01-11

Abstract

The utility model provides a curve length measuring ruler, which aims to solve the problem that the curve length is inconvenient to measure in life or work. The utility model comprises a shell, and a measuring roller and a circle counting pointer which are respectively arranged at two ends of the inside of the shell, wherein a reduction ratio is configured between the measuring roller and the circle counting pointer through a gear set; the circumference of the measuring roller is taken as a measuring unit, the rim of the measuring roller is carved with scale marks, the measuring roller is attached to move on a curve during use, the length of the curve is fed back rapidly through the number of turns recorded by the pointer of the circle and the distance of the measuring roller moving on the last circle, the use is convenient, the design accords with ergonomics, and the appearance is concise and attractive.

Description

Curve length measuring ruler

Technical Field

The utility model relates to the technical field of instruments and meters, in particular to a curve length measuring ruler.

Background

In daily work and life, the condition that needs to measure the curve length is frequently met, such as clothing tailor, house decoration, sheet metal manufacturing, etc., the object to be measured or the surface to be measured sometimes have concave-convex of the curve, and the traditional measuring method is difficult to measure the curve rapidly and accurately. Therefore, there is a need for a portable and viable curve length measuring scale that can be used in a living, working setting.

Disclosure of utility model

Aiming at the defects in the prior art, the application provides the curve length measuring ruler which is designed to be in accordance with ergonomics, has a concise and attractive appearance, can quickly and accurately measure the length of a curve, and has a zeroing function.

The technical scheme adopted for solving the technical problems is as follows:

A curve length measurement chi, its characterized in that: the automatic measuring device comprises a shell, a driving gear is arranged inside one end of the shell, a measuring roller is arranged on the driving gear coaxially, the radius of the measuring roller extends from the coaxial position of the driving gear to the outside of the shell, a driven gear is also arranged inside the other end of the shell, a scale assembly for displaying a measuring result is arranged on the coaxial position of the driven gear, and the driving gear and the driven gear are in meshed transmission through a gear set.

Further, the casing is including the cavity that is used for holding internals and demountable installation in the bottom plate of cavity below, the one end shaping that the driving gear was kept away from to the cavity has the handle, the arc wall that is used for installing the measuring roller has been seted up to the one end that the cavity is close to the driving gear.

Further, a limit ball is arranged at the tail part of the grip.

Further, the driving gear, the driven gear and the gear set are all installed through a transmission shaft arranged on the bottom plate.

Further, the scale assembly comprises a circle counting pointer arranged on the driven gear coaxially and a dial plate which is embedded in the upper surface of the cavity and corresponds to the circle counting pointer.

Further, scale marks are engraved on the measuring roller, and a roller pointer is arranged in the horizontal center of the shell.

Further, the lap pointer is mounted on a transmission shaft of the driven gear through a buckle.

The beneficial effects of the utility model are as follows:

Compared with the prior art, the utility model provides a measuring ruler capable of rapidly measuring the curve length; the circumference of the measuring roller is taken as a measuring unit, the rim of the measuring roller is carved with scale marks, the measuring roller is attached to move on a curve during use, the length of the curve is fed back rapidly through the number of turns recorded by the pointer of the circle and the distance of the measuring roller moving on the last circle, the use is convenient, the design accords with ergonomics, and the appearance is concise and attractive.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a top view of the present utility model;

FIG. 4 is a schematic view of the buckle according to the present utility model;

FIG. 5 is a schematic illustration of a case of the present utility model for measuring curve readings.

Wherein: 1. a housing; 11. a cavity; 12. a bottom plate; 13. a grip; 14. an arc-shaped groove; 15. a limit ball; 16. a roller pointer; 2. a drive gear; 3. measuring a roller; 31. scale marks; 4. a driven gear; 5. a scale assembly; 51. a circle counting pointer; 52. a dial; 53. a buckle; 6. a gear set; 7. and a transmission shaft.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

The utility model provides a curve length measuring ruler, which aims to solve the problem that the curve length is inconvenient to measure in life or work.

Specifically, as shown in fig. 1 to 4, the utility model comprises a shell 1, wherein a driving gear 2 is arranged in one end of the shell 1, a measuring roller 3 is coaxially arranged on the driving gear 2, the radius of the measuring roller 3 extends from the coaxial position of the driving gear 2 to the outside of the shell 1, a driven gear 4 is also arranged in the other end of the shell 1, a scale assembly 5 for displaying the measurement result is arranged at the coaxial position of the driven gear 4, and the driving gear 2 and the driven gear 4 are in meshed transmission through a gear set 6. Through above-mentioned technical scheme, design a circumference and be 100 mm's measurement gyro wheel 3, through gear train 6 transmission, reduce the rotational speed of measurement gyro wheel 3 to 1/10, drive scale subassembly 5 through the gear after the speed reduction and rotate the record number of turns.

In particular, in the present embodiment, the roller diameter design selects a roller having a circumference of 100mm in consideration of ease of counting and appropriate overall size, a diameter of 100/pi≡ 31.83099, and takes phi= 31.83mm in consideration of processing of 3D printing and measurement allowance. Theoretically, the error per revolution is about 0.003mm, which is within the allowable range of the measurement error.

In particular, in the present embodiment, the rim portion of the measuring roller 3 is designed in a thinned form, thereby ensuring positioning accuracy when measuring a thin curve.

In some embodiments, the casing 1 comprises a cavity 11 for accommodating internal parts and a bottom plate 12 detachably arranged below the cavity 11, a handle 13 is formed at one end of the cavity 11 far away from the driving gear 2, an arc-shaped groove 14 for installing the measuring roller 3 is formed at one end of the cavity 11 near the driving gear 2, and a limit ball 15 is arranged at the tail part of the handle 13; through the technical scheme, the size of the shell 1 refers to the size of a common pen, and the limit ball 15 is added at the tail end of the grip 13, so that the grip 13 can flexibly turn when being held in the hand to conveniently measure curves.

Particularly, the design is conventionally carried out with right-handed practice, and the left side of gyro wheel measurement chi is convenient for observe and the number of degrees during the measurement, in order to be fit for the user of left-handed practice simultaneously, can also design mirror image structure's style.

In some embodiments, the driving gear 2, the driven gear 4, and the gear set 6 are all mounted by a drive shaft 7 disposed on a base plate 12.

The gear set 6 is used for enabling the measuring roller 3 to provide a reduction ratio relative to the driven gear 4, and in the embodiment, the gear transmission has the advantages of constant instantaneous transmission ratio, high transmission precision, high efficiency and the like; in order to achieve a compact structure as much as possible, it is preferable to use a gear set 6 with a module of 0.5 and to use a 3-stage reduction with a total gear ratio of 10. Specifically, the tooth number configuration table of the three-stage gear set 6 is as follows:

Tooth number configuration table for three stage gear set

	Level I	Grade II	Class III
				Gear teeth number	45	40	42
Gear teeth number	21	18	20

In some embodiments, the scale assembly 5 includes a turn indicator 51 mounted coaxially on the driven gear 4, and a dial 52 is mounted embedded in the cavity 11 corresponding to the position of the turn indicator 51.

By the technical proposal, the utility model has the advantages that,

Particularly, the zero setting function of the measuring roller 3 is also configured, a close-fitting buckle 53 with a notch is arranged on the transmission shaft 7 of the driven gear 4, and the circle counting pointer 51 can rotate along with the shaft due to the tight connection when the output shaft rotates normally; when zero adjustment is needed, the measuring roller 3 is fixed, the circle pointer 51 is stirred with force, and the circle pointer 51 can be independently rotated to any position, so that zero adjustment is fast achieved.

In some embodiments, the measuring roller 3 is engraved with graduation marks 31, and the horizontal center of the housing 1 is provided with a roller pointer 16. Through above-mentioned technical scheme, will measure the scale mark 31 on the wheel disc of gyro wheel 3 and extend to the rim, when making things convenient for the reading, can increase the frictional force of rim, skid when avoiding rolling measurement.

The working principle of the utility model is as follows:

Step 1, zeroing: the roller is rotated firstly, the 0 scale position of the roller pointer 16 is aligned with the scale mark 31 on the shell 1, then the roller is kept still, the circle pointer 51 is rotated, and the zero setting is realized by rotating to the 0 scale position.

Step 2, measuring: the 0 scale position of the roller is aligned with the starting point of the curve to be measured, then the roller is pressed, and the roller rolls to the ending position of the curve along the curve path.

Step 3, reading: after the measurement is finished, the scale position is reserved on the measuring ruler, the circumferential distance of the rotation of the roller can be read from the scales on the side surface of the roller, the scale unit on the measuring roller 3 is cm, each cell is 1mm, the length of each circle of rolling of the measuring roller 3 is 100mm (namely corresponding to the circumference of the measuring roller), and one cell is rotated corresponding to the circle pointer 51. Thus, when reading, the length of the curve = the number of turns of the circle pointer 51 =100+ the distance travelled by the measuring roller 3 beyond the 0 scale, as shown in fig. 5, the reading is 314cm.

The above description is intended to be illustrative of the utility model and not limiting, the scope of the utility model being defined by the appended claims, and any form of substitution or modification may be made within the scope of the utility model.

Claims

1. A curve length measurement chi, its characterized in that: including casing (1), the inside driving gear (2) that is provided with of one end of casing (1), driving gear (2) are coaxial to be provided with and measure gyro wheel (3), the radius of measuring gyro wheel (3) is from the coaxial department extension of driving gear (2) to casing (1) outside, the inside driven gear (4) that still is provided with of the other end of casing (1), driven gear (4) coaxial department is provided with scale subassembly (5) that show measuring result, through gear train (6) meshing transmission between driving gear (2) and driven gear (4).

2. A curve length measuring scale according to claim 1, wherein: the casing (1) is including being used for holding cavity (11) and the bottom plate (12) of demountable installation in cavity (11) below, the one end shaping that cavity (11) kept away from driving gear (2) has handle (13), arc wall (14) that are used for installing measuring roller (3) have been seted up to the one end that cavity (11) are close to driving gear (2).

3. A curved length measuring scale according to claim 2, wherein: the tail part of the handle (13) is provided with a limit ball (15).

4. A curved length measuring scale according to claim 2, wherein: the driving gear (2), the driven gear (4) and the gear set (6) are all installed through a transmission shaft (7) arranged on the bottom plate (12).

5. A curve length measuring scale according to claim 1, wherein: the scale assembly (5) comprises a circle counting pointer (51) which is arranged on the driven gear (4) in a coaxial mode, and a dial (52) which is embedded in the upper surface of the cavity (11) and corresponds to the circle counting pointer (51).

6. A curve length measuring scale according to claim 1, wherein: scale marks (31) are engraved on the measuring roller (3), and a roller pointer (16) is arranged at the horizontal center of the shell (1).

7. A curved length measuring scale according to claim 5, wherein: the circle counting pointer (51) is arranged on a transmission shaft (7) of the driven gear (4) through a buckle (53).