CN109177605A - A kind of ruler used in mathematics teaching tool system - Google Patents

Abstract

The invention discloses a kind of ruler used in mathematics teaching to have system, including mounting seat, the back-end sealing of the mounting seat is connected with a supporting module, it states and is provided with an absorption module at the front end face of mounting seat, a piston head is combined in the absorption module, sealing is formed between the piston head and the absorption module inner wall, a piston rod is connected at the front end of the piston head, the piston rod connects pelmatozoa far from that one end of the piston head, the mounting seat is connected with angle scale by external screw thread, a rotary sleeve is provided on the pipe shaft of the absorption module, bearing is combined between the rotary sleeve and the absorption module, ruler item is provided at the outer wall of the rotary sleeve, the front end face of the ruler item is provided through groove body, deck is combined in the groove body, T-shaped card slot is provided on the left of the ruler item, Ruler is combined in the card slot；The present apparatus can be adsorbed on blackboard, and teacher is helped to draw the circular arc line of more standard.

Description

A kind of ruler used in mathematics teaching tool system

Technical field

The present invention relates to a kind of ruler used in mathematics teaching to have system.

Background technique

During mathematical education, it is often necessary to draw circular arc, the existing circular arc technique of painting is mainly the bikini technique of painting, to operation It is more demanding, and the camber line degree of the circular arc drawn is poor, more unsightly, partially has the teachers association of patients with OCD to repeat more Secondary picture circular arc line extends time in classroom, reduces efficiency of giving lessons, and the outside diameter of protractor is fixed, therefore can only be drawn Angle line, and circular arc line is not helped.

Based on the above issues, it is desirable to provide one kind can be adsorbed on blackboard, and teacher is helped to draw the circular arc of more standard The ruler used in mathematics teaching of line has system.

Summary of the invention

Technical problem to be solved by the invention is to provide one kind to be adsorbed on blackboard, helps teacher to draw and more marks The ruler used in mathematics teaching of quasi- circular arc line has system.

The present invention is achieved through the following technical solutions:

A kind of ruler used in mathematics teaching tool system, including mounting seat, the back-end sealing of the mounting seat are connected with one Hold mode block, the supporting module have pipe portion, and the outside of the mounting seat has external screw thread, the front end face of the mounting seat Place is provided with an absorption module, and the pipe portion cooperates the absorption module, a piston head, institute are combined in the absorption module It states and forms sealing between piston head and the absorption module inner wall, be connected with a piston rod at the front end of the piston head, it is described Piston rod connects pelmatozoa far from that one end of the piston head, and the mounting seat is connected with angle scale by external screw thread, institute The front end face for stating angle scale is provided with angle index, and a horizontal ruler, the absorption are embedded at the front end face of the angle module It is provided with a rotary sleeve on the pipe shaft of module, bearing, the rotary sleeve are combined between the rotary sleeve and the absorption module Outer wall at be provided with ruler item, the front end face of the ruler item is provided through groove body, and deck is combined in the groove body, described It is provided with a screw rod at the outer wall of deck, the sliding slot of the screw rod is provided through at the right positions of the ruler item, it is described That one end fits that screw rod passes through the sliding slot have nut, and T-shaped card slot is provided on the left of the ruler item, the card slot The ruler item is run through in upper end, and ruler is combined in the card slot, and the front end face of the ruler has ruler scale, the deck Outer wall at integrally formed with a cooperation ruler scale indicating module, the ruler item is close to the rotary sleeve position Place is provided with the peep hole for cooperating the angle index.

Preferably, the piston rod is cross star piston rod, and the piston rod is solid construction, and the piston rod is modeling Expect material.

Preferably, that one end that the piston rod extends to outside the absorption module is provided with a stop sleeve, described to stop Dynamic set cooperation, by the way that stop sleeve is arranged, is avoided due to produced in supporting module between the absorption module and the shank Negative pressure piston head adsorbed again go back, it is ensured that the present apparatus can be firmly adsorbed on blackboard.

Preferably, with the non-slip groove of an arc at the outer wall of the shank, drawing piston rod is convenient for by non-slip groove.

Preferably, it is combined with magnifying glass in the peep hole, is provided with identification strip at the shaft core position of the magnifying glass, Angle index can be amplified by magnifying glass, convenient for observation scale.

Present classroom teaching, chalk using fewer and fewer, the chalk dust that when chalk use generates can be to the pharynx of teacher Larynx and lung cause irreversible injury, therefore mostly carry out classroom instruction using the clipboard cooperation free ink pen of white, more defend It is raw, and the supporting module in the present apparatus can reliably be adsorbed for the smooth surface of clipboard, avoid falling, and be recycled Bearing supports that ruler item is rotated, and draws lines more smooth, resistance is smaller.

The beneficial effects of the present invention are: the position of deck is adjustable in the present apparatus, adjusted according to the diameter of the circular arc of required picture The position of deck is saved, after the completion of deck adjustment, the locking of deck is can be realized in hand nutting, preferable circular arc line is conveniently drawn, The angle of circular arc line can be controlled by angle index simultaneously, and setting-out more standard, the structure of the present apparatus is relatively simple, cost It is more cheap, operate more convenient, suitable popularization and use.

Specific embodiment

All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive Feature and/or step other than, can combine in any way.

Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics ?.

A kind of ruler used in mathematics teaching tool system, including mounting seat, the back-end sealing of the mounting seat are connected with one Hold mode block, the supporting module have pipe portion, and the outside of the mounting seat has external screw thread, the front end face of the mounting seat Place is provided with an absorption module, and the pipe portion cooperates the absorption module, a piston head, institute are combined in the absorption module It states and forms sealing between piston head and the absorption module inner wall, be connected with a piston rod at the front end of the piston head, it is described Piston rod connects pelmatozoa far from that one end of the piston head, and the mounting seat is connected with angle scale by external screw thread, institute The front end face for stating angle scale is provided with angle index, and a horizontal ruler, the absorption are embedded at the front end face of the angle module It is provided with a rotary sleeve on the pipe shaft of module, bearing, the rotary sleeve are combined between the rotary sleeve and the absorption module Outer wall at be provided with ruler item, the front end face of the ruler item is provided through groove body, and deck is combined in the groove body, described It is provided with a screw rod at the outer wall of deck, the sliding slot of the screw rod is provided through at the right positions of the ruler item, it is described That one end fits that screw rod passes through the sliding slot have nut, and T-shaped card slot is provided on the left of the ruler item, the card slot The ruler item is run through in upper end, and ruler is combined in the card slot, and the front end face of the ruler has ruler scale, the deck Outer wall at integrally formed with a cooperation ruler scale indicating module, the ruler item is close to the rotary sleeve position Place is provided with the peep hole for cooperating the angle index.

A preferred embodiment in the present invention, the piston rod are cross star piston rod, and the piston rod is solid Structure, the piston rod are plastic material.

A preferred embodiment in the present invention, the piston rod extend to the setting of that one end outside the absorption module Have a stop sleeve, the stop sleeve cooperation is between the absorption module and the shank, by the way that stop sleeve is arranged, avoid due to Piston head is adsorbed again and is gone back by generated negative pressure in supporting module, it is ensured that the present apparatus can be firmly adsorbed on blackboard.

A preferred embodiment in the present invention, with the non-slip groove of an arc at the outer wall of the shank, by anti-skidding Slot is convenient for drawing piston rod.

A preferred embodiment in the present invention is combined with magnifying glass, the axle center of the magnifying glass in the peep hole It is provided with identification strip at position, angle index can be amplified by magnifying glass, convenient for observation scale.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, of the invention Protection scope should be determined by the scope of protection defined in the claims.

Claims (5)

1. a kind of ruler used in mathematics teaching has system, it is characterised in that: including mounting seat, the back-end sealing of the mounting seat connects It is connected to a supporting module, the supporting module has pipe portion, and the outside of the mounting seat has external screw thread, the mounting seat Front end face at be provided with an absorption module, the pipe portion cooperates the absorption module, is combined with one in the absorption module Piston head forms sealing, it is living that one is connected at the front end of the piston head between the piston head and the absorption module inner wall Stopper rod, the piston rod connect pelmatozoa far from that one end of the piston head, and the mounting seat is connected with by external screw thread Angle scale, the front end face of the angle scale are provided with angle index, a horizontal ruler are embedded at the front end face of the angle module, It is provided with a rotary sleeve on the pipe shaft of the absorption module, bearing, institute are combined between the rotary sleeve and the absorption module It states and is provided with ruler item at the outer wall of rotary sleeve, the front end face of the ruler item is provided through groove body, is combined in the groove body Deck is provided with a screw rod at the outer wall of the deck, is provided through the screw rod at the right positions of the ruler item Sliding slot, that one end fits that the screw rod passes through the sliding slot have nut, are provided with T-shaped card slot on the left of the ruler item, The ruler item is run through in the upper end of the card slot, and ruler is combined in the card slot, and the front end face of the ruler is carved with ruler It spends, integrally formed with the indicating module of a cooperation ruler scale at the outer wall of the deck, the ruler item is close to institute State the peep hole for being provided at rotary sleeve position and cooperating the angle index.

2. ruler used in mathematics teaching according to claim 1 has system, it is characterised in that: the piston rod is living for cross star Stopper rod, the piston rod are solid construction, and the piston rod is plastic material.

3. ruler used in mathematics teaching according to claim 1 has system, it is characterised in that: the piston rod extends to the suction That one end for receiving module-external is provided with a stop sleeve, and the stop sleeve cooperation is between the absorption module and the shank.

4. ruler used in mathematics teaching according to claim 1 has system, it is characterised in that: have one at the outer wall of the shank The non-slip groove of arc.

5. ruler used in mathematics teaching according to claim 1 has system, it is characterised in that: be combined with and put in the peep hole Big mirror is provided with identification strip at the shaft core position of the magnifying glass.