CN209111821U - A kind of portable mathmatical ruler - Google Patents

Abstract

The utility model discloses a kind of portable mathmatical rulers, including fixed shell, the first rubber sleeve, the first graduated scale, fixator, the second graduated scale, the second rubber sleeve and chalk fixed block, the fixator includes upper fixed disk, first bearing, second bearing, lower fixed disk, limit spring and positive stop bead, it is fixedly installed with the first bearing and second bearing between fixed disk and lower fixed disk respectively, fixed disk lower end outer edge opens up that there are two symmetrical cylindrical shrinkage pools.Beneficial effect is: by setting master calibration ruler and secondary graduated scale, can satisfy the different demands of teacher, improves convenience；The first graduated scale and the second graduated scale are fixed by setting limit spring and positive stop bead, prevents from shaking, is conducive to teacher's drawing；By the way that laser lamp is arranged, blackboard is indicated convenient for teacher, is conducive to improve efficiency of giving lessons；The position that pilot pin is adjusted by setting pilot pin and regulation handle, prevents positioning needlestick injury people, is conducive to improve safety.

Description

A kind of portable mathmatical ruler

Technical field

The utility model relates to mathematics appliance fields, more particularly to a kind of portable mathmatical ruler.

Background technique

In mathematical education, teacher usually needs to draw the figures such as geometric figure and coordinate system, students is made to deepen the impression, It fully understands, therefore needs to prepare many different drawing tools, including ruler, set square, protractor and compasses when preparing lessons Equal tools, inconvenient to carry since drawing tool is more, teacher, which once forgets to carry certain drawing tool, will cause mapping to be difficult to It completes, delays the class period, or even upset the teaching programme of teacher, influence efficiency of giving lessons, teacher is that student refers to some at school When figure or knowledge point, before needing to return to blackboard, many inconvenience are brought to teacher.

Utility model content

The purpose of this utility model is that solve the above-mentioned problems and provides a kind of portable mathmatical ruler.

The utility model achieves the above object through the following technical schemes:

A kind of portable mathmatical ruler, including fixed shell, the first rubber sleeve, the first graduated scale, fixator, the second scale Ruler, the second rubber sleeve and chalk fixed block, the fixator include upper fixed disk, first bearing, second bearing, lower fixed disk, Limit spring and positive stop bead are fixedly installed with the first bearing and the second axis respectively between fixed disk and lower fixed disk It holds, fixed disk lower end outer edge is opened up there are two symmetrical cylindrical shrinkage pool, and cylinder shrinkage pool inside is solid Dingan County is equipped with the limit spring, and the limit spring lower end is welded with the positive stop bead, and fixed plate inlaid has laser Lamp is fixedly installed with button cell inside fixed disk, and the fixator two sides are respectively arranged with first graduated scale With the second graduated scale, the first bearing and second graduated scale are by being welded to connect, the second bearing and described first For graduated scale by being welded to connect, second graduated scale includes master calibration ruler, secondary graduated scale and flat thin magnet, in the master calibration ruler Portion is equipped with sliding slot, and the master calibration ruler internal slide is connected with the secondary graduated scale, and the master calibration ruler is inlayed with secondary graduated scale Embedded with mutually matched flat thin magnet, first graduated scale is identical as the second graduated scale structure, and second graduated scale is remote It is nested with second rubber sleeve from described fixator one end, second rubber sleeve is fixedly mounted far from described fixator one end There is the chalk fixed block, the chalk fixed block includes spring leaf and nut, and the spring leaf outside screw is connected with described Nut, first graduated scale are arranged with first rubber sleeve far from described fixator one end, and first rubber sleeve is separate The fixator side is fixedly installed with the fixed shell, and the fixed shell offers guide rail, the fixed enclosure interior Inner cavity is offered, the inner cavity is fixedly installed with reset spring close to first rubber sleeve side, and the reset spring is another End is welded with pilot pin, and perpendicular regulation handle is welded on the outside of the pilot pin, and the regulation handle passes through the guide rail Fixed hull outside is extended to, the master calibration ruler, the secondary graduated scale and upper fixed disk are equipped with graduation mark.

Preferably, master calibration ruler two sides are equipped with graduation mark, the scale of the master calibration ruler and the secondary graduated scale Line is length scale line, and the graduation mark of fixed disk is angle index line.

Preferably, first rubber sleeve and second rubber sleeve outer surface are equipped with anti-skid chequer.

Beneficial effect is: folding the first graduated scale and the second graduated scale by setting fixator, advantageously reduces occupancy Space, it is easy to carry；It by setting master calibration ruler and secondary graduated scale, can satisfy the different demands of teacher, improve convenience；It is logical It crosses setting limit spring and positive stop bead fixes the first graduated scale and the second graduated scale, prevent from shaking, guarantee stability, be conducive to teach Shi Huitu；By the way that laser lamp is arranged, blackboard is indicated convenient for teacher, is conducive to improve efficiency of giving lessons；By being arranged in upper fixed disk Angle index line improves convenience convenient for the angle and polygon of measurement angle and drafting different angle；By setting pilot pin and Regulation handle adjusts the position of pilot pin, prevents positioning needlestick injury people, is conducive to improve safety.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of structural schematic diagram of portable mathmatical ruler described in the utility model；

Fig. 2 is a kind of main view of portable mathmatical ruler described in the utility model；

Fig. 3 is a kind of structural schematic diagram of the second graduated scale of portable mathmatical ruler described in the utility model；

Fig. 4 is a kind of perspective view of the second graduated scale of portable mathmatical ruler described in the utility model；

Fig. 5 is a kind of Section A-A figure of portable mathmatical ruler described in the utility model；

Fig. 6 is a kind of structural schematic diagram of the fixator of portable mathmatical ruler described in the utility model；

Fig. 7 is a kind of local part drawing of portable mathmatical ruler described in the utility model；

The reference numerals are as follows:

1, fixed shell；101, regulation handle；102, reset spring；103, pilot pin；104, inner cavity；105, guide rail；2, First rubber sleeve；3, the first graduated scale；4, fixator；401, first bearing；402, second bearing；403, laser lamp；404, circle Cylindricality shrinkage pool；405, limit spring；406, positive stop bead；407, button cell；408, upper fixed disk；409 lower fixed disks；5, second Graduated scale；501, master calibration ruler；502, secondary graduated scale；503, sliding slot；504, flat thin magnet；505, groove；6, graduation mark；7, second Rubber sleeve；8, chalk fixed block；801, spring leaf；802, nut.

Specific embodiment

Below in conjunction with attached drawing, the technical solution of the utility model is further explained:

As shown in Fig. 1-Fig. 7, a kind of portable mathmatical ruler, including fixed shell 1, the first rubber sleeve 2, the first graduated scale 3, Fixator 4, the second graduated scale 5, the second rubber sleeve 7 and chalk fixed block 84, fixator 4 include upper fixed disk 408, first bearing 401, second bearing 402, lower fixed disk 409, limit spring 405 and positive stop bead 406, upper fixed disk 408 and lower fixed disk 409 it Between be fixedly installed with first bearing 401 and second bearing 402 respectively, first bearing 401 and second bearing 402 are for fixed rotation First graduated scale 3 and the second graduated scale 5, upper 408 lower end outer edge of fixed disk are opened up there are two symmetrical cylindrical shrinkage pool 404, limit spring 405 is fixedly installed with inside cylindrical shrinkage pool 404, and 405 lower end of limit spring is welded with positive stop bead 406, limit For fixing the first graduated scale 3 and the second graduated scale 5, upper fixed disk 408 is inlaid with laser lamp for position spring 405 and positive stop bead 406 403, laser lamp 403 is used to indicate blackboard, and button cell 407 is fixedly installed with inside upper fixed disk 408, and button cell 407 is used In providing electric energy, 4 two sides of fixator are respectively arranged with the first graduated scale 3 and the second graduated scale 5, the first graduated scale 3 and the second quarter Degree ruler 5 is for drawing, and by being welded to connect, second bearing 402 and the first graduated scale 3 are logical for first bearing 401 and the second graduated scale 5 Cross welded connecting, the second graduated scale 5 includes master calibration ruler 501, secondary graduated scale 502 and flat thin magnet 504, inside master calibration ruler 501 Equipped with sliding slot 503,501 internal slide of master calibration ruler is connected with secondary graduated scale 502, and secondary graduated scale 502 is used for adjustment length, main quarter Degree ruler 501 and secondary graduated scale 502 are inlaid with mutually matched flat thin magnet 504, and flat thin magnet 504 is for adsorbing fixation, the first quarter Degree ruler 3 is identical as 5 structure of the second graduated scale, and the second graduated scale 5 is nested with the second rubber sleeve 7, the second rubber far from 4 one end of fixator For gum cover 7 for fixing, the second rubber sleeve 7 is fixedly installed with chalk fixed block 84 far from 4 one end of fixator, and chalk fixed block 84 is used In installing fixed chalk, chalk fixed block 84 includes spring leaf 801 and nut 802, and nut 802 is used for adjustment spring piece 801, bullet 801 outside screw of reed is connected with nut 802, and the first graduated scale 3 is arranged with the first rubber sleeve 2 far from 4 one end of fixator, and first Rubber sleeve 2 is fixedly installed with fixed shell 1 far from 4 side of fixator, and fixed shell 1 offers guide rail 105, and guide rail 105 is used for Secured adjusted handle 101 is adjusted, offers inner cavity 104 inside fixed shell 1, inner cavity 104 is fixed close to 2 side of the first rubber sleeve Reset spring 102 is installed, 102 other end of reset spring is welded with pilot pin 103, is welded on the outside of pilot pin 103 perpendicular Regulation handle 101, regulation handle 101 passes through guide rail 105 and extends to outside fixed shell 1, master calibration ruler 501, secondary graduated scale 502 and upper fixed disk 408 be equipped with graduation mark 6,501 two sides of master calibration ruler are equipped with graduation mark 6, master calibration ruler 501 and secondary carve The graduation mark 6 for spending ruler 502 is length scale line 6, and the graduation mark 6 of upper fixed disk 408 is angle index line 6, the first rubber sleeve 2 with Second rubber sleeve, 7 outer surface is equipped with anti-skid chequer.

Working principle: in use, the first graduated scale 3 and the second graduated scale 5 are folded to 180 °, positive stop bead 406 and groove 505 match and fix the first graduated scale 3 and the second graduated scale 5, guarantee drawing stability, when length is inadequate, remove the first rubber Set 2 and the second rubber sleeve 7 pull out secondary graduated scale 502, meet different demands when drawing, and chalk is put into chalk and fixed by picture bowlder Block 8, rotating nuts 802 are fixed, and adjustment regulation handle 101 is mobile and stationary positioned needle 103, draw it is round, when needing When indicating the content on blackboard, the first graduated scale 3 and the second graduated scale 5 are folded to together, laser lamp 403 is opened and is referred to Show.

The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry It should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe this The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change And improvement, these various changes and improvements fall within the scope of the claimed invention.

Claims (3)

1. a kind of portable mathmatical ruler, it is characterised in that: including fixed shell (1), the first rubber sleeve (2), the first graduated scale (3), fixator (4), the second graduated scale (5), the second rubber sleeve (7) and chalk fixed block (84), the fixator (4) includes upper Fixed disk (408), first bearing (401), second bearing (402), lower fixed disk (409), limit spring (405) and positive stop bead (406), the first bearing (401) and are fixedly installed between fixed disk (408) and lower fixed disk (409) respectively Two bearings (402), fixed disk (408) lower end outer edge are opened up there are two symmetrical cylindrical shrinkage pool (404), institute It states and is fixedly installed with the limit spring (405) inside cylindrical shrinkage pool (404), limit spring (405) lower end is welded with The positive stop bead (406), fixed disk (408) are inlaid with laser lamp (403), fixed inside fixed disk (408) It is equipped with button cell (407), fixator (4) two sides are respectively arranged with first graduated scale (3) and the second graduated scale (5), the first bearing (401) and second graduated scale (5) be by being welded to connect, the second bearing (402) with it is described First graduated scale (3) by being welded to connect, second graduated scale (5) include master calibration ruler (501), secondary graduated scale (502) and Flat thin magnet (504), the master calibration ruler (501) is internal to be equipped with sliding slot (503), master calibration ruler (501) the internal slide connection There is the secondary graduated scale (502), the master calibration ruler (501) and secondary graduated scale (502) are inlaid with mutually matched flat thin magnet (504), first graduated scale (3) is identical as the second graduated scale (5) structure, and second graduated scale (5) is far from described Fixator (4) one end is nested with second rubber sleeve (7), and second rubber sleeve (7) is solid far from the fixator (4) one end Dingan County is equipped with the chalk fixed block (84), and the chalk fixed block (84) includes spring leaf (801) and nut (802), described Spring leaf (801) outside screw is connected with the nut (802), and first graduated scale (3) is far from the fixator (4) one end It is arranged with first rubber sleeve (2), first rubber sleeve (2) is fixedly installed with described far from the fixator (4) side Fixed shell (1), the fixed shell (1) offer guide rail (105), offer inner cavity inside the fixed shell (1) (104), the inner cavity (104) is fixedly installed with reset spring (102), the reset close to the first rubber sleeve (2) side Spring (102) other end is welded with pilot pin (103), is welded with perpendicular regulation handle on the outside of the pilot pin (103) (101), the regulation handle (101) passes through the guide rail (105) and extends to fixed shell (1) outside, the master calibration ruler (501), the secondary graduated scale (502) and upper fixed disk (408) are equipped with graduation mark (6).

2. a kind of portable mathmatical ruler according to claim 1, it is characterised in that: master calibration ruler (501) two sides are equal Equipped with graduation mark (6), the graduation mark (6) of the master calibration ruler (501) and the secondary graduated scale (502) is length scale line (6), The graduation mark (6) of fixed disk (408) is angle index line (6).

3. a kind of portable mathmatical ruler according to claim 1, it is characterised in that: first rubber sleeve (2) with it is described Second rubber sleeve (7) outer surface is equipped with anti-skid chequer.