CN107839373A - Portable type draws circle chalk sleeve - Google Patents

Portable type draws circle chalk sleeve Download PDF

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Publication number
CN107839373A
CN107839373A CN201711111726.2A CN201711111726A CN107839373A CN 107839373 A CN107839373 A CN 107839373A CN 201711111726 A CN201711111726 A CN 201711111726A CN 107839373 A CN107839373 A CN 107839373A
Authority
CN
China
Prior art keywords
chalk
drawstring
sleeve
portable
portable type
Prior art date
Application number
CN201711111726.2A
Other languages
Chinese (zh)
Inventor
赵雅琴
Original Assignee
赵雅琴
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 赵雅琴 filed Critical 赵雅琴
Priority to CN201711111726.2A priority Critical patent/CN107839373A/en
Publication of CN107839373A publication Critical patent/CN107839373A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/016Holders for crayons or chalks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00Circular curve-drawing or like instruments

Abstract

The present invention provides a kind of portable type and draws circle chalk sleeve, including can be embedded in the pipe sleeve of chalk;The pipe sleeve connects one section of gripping cylinder to rear axle;The casing surface is formed with non-slip texture, or is coated with anti-slip rubber layer;In order to grip.The chalk sleeve not only can isolate hand with chalk, and be easy to draw circle.

Description

Portable type draws circle chalk sleeve
Technical field
The present invention relates to teaching field of stationery, more particularly, to a kind of chalk sleeve.
Background technology
During teachers ' teaching, chalk is basic writing or drawing instrument;During using chalk, in order to as far as possible Keep hand clean, at present with various forms of chalk sleeves, chalk can be filled in wherein;Enter running hand again after being affectedly bashful chalk sleeve Write, you can avoid hand from directly being contacted with chalk, so as to keep hand clean.However, although current chalk sleeve form is more, Fixed structure is substantially, in addition to making hand and chalk mutually isolated, not other functions.
On the other hand, during mathematical education, it usually needs drafting circle, current mode are on blackboard, or Freehand, or by compasses.And because the volume of compasses is larger, operate more troublesome, thus more teacher it is slack in Use;During free-hand circle, because chalk needs the locus on blackboard to need 360 ° of conversion, the nib of chalk was both cut To frictional force, also by radial frictional force so that whole drawing process needs certain force skill, and it is improper slightly to hold, just Circle will be made to produce local deformation, be finally difficult to draw regular circle.
The content of the invention
In view of the above-mentioned problems, it is an object of the invention to provide a kind of portable type to draw circle chalk sleeve, the chalk sleeve not only may be used Hand is isolated with chalk, and is easy to draw circle.
The technical solution adopted for the present invention to solve the technical problems is:The portable type, which draws circle chalk sleeve, includes that powder can be embedded in The pipe sleeve of pen;The pipe sleeve connects one section of gripping cylinder to rear axle.
Preferably, the casing surface is formed with non-slip texture, or it is coated with anti-slip rubber layer;In order to grip.
Preferably, the gripping cylinder has hollow cavity, it is internally connected with a drawstring, the freedom of the drawstring End is provided with fixed part of the pressable on blackboard;The outer end of the hollow cavity is provided with Elastic buckle mechanism, the Elastic buckle When unclamping, the drawstring can pull out from the hollow cavity for mechanism;During the Elastic buckle mechanism clamping, the drawing Rope is blocked and can not be pulled out by the Elastic buckle mechanism;Also, a Plane of rotation is additionally provided with gripping on the gripping cylinder The orthogonal back-up roller wheel of column axis;The supporting rollern can be supported on blackboard simultaneously with chalk nib.Further, The Elastic buckle mechanism includes the fixed plate with longitudinal hole, and the portable plate with longitudinal hole, and the one of the portable plate Side connects the press section for crossing out hollow cavity, and is horizontally arranged between the opposite side of portable plate and the inwall of hollow cavity Support spring;In its natural state, the fixed plate, the longitudinal hole on portable plate mutually stagger, to realize to the drawstring Clamping;And when the press section presses inward against suitable distance, the longitudinal hole in the fixed plate, portable plate is mutually just It is right so that the drawstring can fixed plate, portable plate longitudinal hole between move freely.
Preferably, the end for gripping cylinder is provided with one section of shaping deformation bar, the shaping deformation bar oneself Laser rays emitting head is provided with by end.
The beneficial effects of the present invention are:The portable type draws circle chalk sleeve in writing, can grip the pipe sleeve and carry out Writing;And when needing to draw circular, then the gripping cylinder is gripped, then projection of the chalk nib on blackboard is around predetermined circle During the heart is rotated by 360 °, the pipe sleeve and chalk will around it is described gripping cylinder axis continuously rotate, make chalk nib with It is between blackboard, be converted into rolling friction along the sliding friction for the circular tangential direction currently drawn so that chalk with it is black Frictional force between plate significantly reduces, and so as to reduce force difficulty, the probability of local deformation is reduced, in order to drawing rule Circle.
Brief description of the drawings
Fig. 1 is the schematic diagram of embodiment one that this portable type draws circle chalk sleeve.
Fig. 2 is the schematic diagram of embodiment two that this portable type draws circle chalk sleeve.
Fig. 3 is the schematic diagram of embodiment three that this portable type draws circle chalk sleeve.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples:
Embodiment one:
In the embodiment one shown in Fig. 1, the portable type draws the pipe sleeve 1 that circle chalk sleeve includes that chalk can be embedded in;The pipe sleeve 1 to Rear axle connects one section of gripping cylinder 2, so that pipe sleeve 1 and gripping cylinder 2 can rotate freely around their common axis.
In addition, the pipe sleeve 1 and gripping cylinder 2 surface are formed with non-slip texture, or anti-slip rubber layer is coated with, in order to hold Hold.
Above-mentioned portable type draws circle chalk sleeve in writing, can grip the pipe sleeve 1 and be write;And justify when needing to draw During shape, then the gripping cylinder 2, the then process that projection of the chalk nib 3 on blackboard is rotated by 360 ° around pre- centering are gripped In, the pipe sleeve 1 and chalk will continuously rotate around the axis of the gripping cylinder 2, make between chalk nib 3 and blackboard, edge The sliding friction for the circular tangential direction currently drawn is converted into rolling friction, so that the frictional force between chalk and blackboard Significantly reduce, so as to reduce force difficulty, the probability of local deformation is reduced, in order to the circle of drawing rule.
Embodiment two:
In the embodiment two shown in Fig. 2, unlike embodiment one, the gripping cylinder 2 has hollow cavity, inside it A drawstring 4 is connected with, the free end of the drawstring 4 is provided with fixed part 5 of the pressable on blackboard;Outside the hollow cavity End is provided with Elastic buckle mechanism, and when unclamping, the drawstring 4 can be pulled outwardly from the hollow cavity for the Elastic buckle mechanism Go out;During the Elastic buckle mechanism clamping, the drawstring 4 is blocked and can not be pulled out by the Elastic buckle mechanism;It is also, described to hold Hold and the Plane of rotation back-up roller wheel 21 orthogonal with gripping column axis, the back-up roller wheel 21 are additionally provided with cylinder 2;It is described Supporting rollern 21 can be supported on blackboard simultaneously with chalk nib 3.In the present embodiment two, the Elastic buckle mechanism includes Fixed plate 61 with longitudinal hole, and the portable plate 62 with longitudinal hole, the side connection of the portable plate 62 cross out The press section 621 of hollow cavity, and supporting spring is horizontally arranged between the opposite side of portable plate 62 and the inwall of hollow cavity 63;In its natural state, the fixed plate 61, the longitudinal hole on portable plate 62 mutually stagger, to realize to the drawstring 4 Clamping;And when the press section 621 presses inward against suitable distance, when reaching the location status shown in Fig. 2, the fixed plate 61st, the longitudinal hole on portable plate 62 is facing each other, so that the drawstring 4 can be in fixed plate 61, the longitudinal hole of portable plate 62 Between move freely.
According to embodiment two, when needing to draw circular, the drawstring 4 need to only be pulled out to rational length, and will The fixed part 5 of the end of drawstring 4 is pressed against predetermined circle centre position, then stretches drawstring 4, makes the back-up roller wheel 21 and chalk of chalk sleeve Nib 3 rolls a circle on blackboard simultaneously in the state of the tensioning of drawstring 4, you can obtains regular circle.Justify when not needing picture When, then drawstring 4 is hidden in the hollow cavity of gripping cylinder 2;Also, for the ease of reclaiming drawstring 4, drawstring 4 can be consolidated It is scheduled on the spring shaft in hollow cavity;It can be seen that when the chalk sleeve draws regular circular, it is extremely convenient.
Embodiment three:
For the embodiment three shown in Fig. 3, unlike embodiment one, the end for gripping cylinder 2 can provided with one section for it Plastic deformation bar 7, the free end of the shaping deformation bar 7 are provided with laser rays emitting head 8.
Embodiment three in use, if desired for regular circle is drawn, then can be pointed out first on blackboard with chalk One center of circle, then the chalk nib in the chalk sleeve is placed on predetermined circumference, adjusts the shaping deformation bar 7, make The laser facula that laser rays emitting head 8 is sent overlaps with the center of circle, then moves chalk sleeve and starts to draw circle, drew Cheng Zhong, as long as making the laser facula that laser rays emitting head 8 is sent be essentially coincided with the center of circle all the time, it is possible to draw regular The higher circle of degree.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and Within principle, any modification for being made, equivalent substitution, it should be included in the scope of the protection.

Claims (5)

1. a kind of portable type draws circle chalk sleeve, including can be embedded in the pipe sleeve of chalk(1);It is characterized in that:The pipe sleeve(1)Backward Axle connects one section of gripping cylinder(2).
2. portable type according to claim 1 draws circle chalk sleeve, it is characterised in that:The pipe sleeve(1)Surface is formed with anti-skidding Lines, or it is coated with anti-slip rubber layer.
3. portable type according to claim 1 draws circle chalk sleeve, it is characterised in that:The gripping cylinder(2)With hollow Inner chamber, it is internally connected with a drawstring(4), the drawstring(4)Free end be provided with fixed part of the pressable on blackboard (5);The outer end of the hollow cavity is provided with Elastic buckle mechanism, and the Elastic buckle mechanism is when unclamping, the drawstring(4)Can Pulled out from the hollow cavity;During the Elastic buckle mechanism clamping, the drawstring(4)By the Elastic buckle mechanism card It can not firmly pull out;Also, the gripping cylinder(2)On be additionally provided with a Plane of rotation with grip cylinder(2)Axis vertical take-off Back-up roller wheel(21), the supporting rollern(21)Can be with chalk nib(3)It is supported on simultaneously on blackboard.
4. portable type according to claim 3 draws circle chalk sleeve, it is characterised in that:It is vertical that the Elastic buckle mechanism includes band To the fixed plate of through hole(61), and the portable plate with longitudinal hole(62), the portable plate(62)Side connection laterally stretch Go out the press section of hollow cavity(621), and portable plate(62)Opposite side and hollow cavity inwall between be horizontally arranged with branch Hold spring(63);In its natural state, the fixed plate(61), portable plate(62)On longitudinal hole mutually stagger, with realize To the drawstring(4)Clamping;And work as the press section(5)When pressing inward against suitable distance, the fixed plate(61), portable plate (62)On longitudinal hole it is facing each other so that the drawstring(4)Can be in fixed plate(61), portable plate(62)Longitudinal hole between Move freely.
5. portable type according to claim 1 draws circle chalk sleeve, it is characterised in that:The gripping cylinder(2)End set There is one section of shaping deformation bar(7), the shaping deformation bar(7)Free end be provided with laser rays emitting head(8).
CN201711111726.2A 2017-11-13 2017-11-13 Portable type draws circle chalk sleeve CN107839373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711111726.2A CN107839373A (en) 2017-11-13 2017-11-13 Portable type draws circle chalk sleeve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711111726.2A CN107839373A (en) 2017-11-13 2017-11-13 Portable type draws circle chalk sleeve

Publications (1)

Publication Number Publication Date
CN107839373A true CN107839373A (en) 2018-03-27

Family

ID=61681645

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711111726.2A CN107839373A (en) 2017-11-13 2017-11-13 Portable type draws circle chalk sleeve

Country Status (1)

Country Link
CN (1) CN107839373A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002192886A (en) * 2000-12-26 2002-07-10 Forakkusu:Kk Digitizer pen
CN201140604Y (en) * 2007-12-14 2008-10-29 浙江工业大学 Modified chalk casing
CN201235670Y (en) * 2008-08-04 2009-05-13 哈布里哈克·依曼买提 Multifunctional chalk jacket
CN201693891U (en) * 2009-07-15 2011-01-05 李江 Blackboard writing device
CN103144470A (en) * 2013-03-05 2013-06-12 东华理工大学 Laser positioning compass
CN204567004U (en) * 2015-03-25 2015-08-19 贵州电子信息职业技术学院 A kind of portable environmental-protection Multifunctional chalk clamp
CN206049110U (en) * 2016-07-08 2017-03-29 梧州市工厂路小学 A kind of electronic device of tinting
CN206589501U (en) * 2017-02-15 2017-10-27 刘正强 A kind of lettering pen
CN206633660U (en) * 2016-09-09 2017-11-14 孙艳丽 A kind of single arm type laser positioning compass for math teaching

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002192886A (en) * 2000-12-26 2002-07-10 Forakkusu:Kk Digitizer pen
CN201140604Y (en) * 2007-12-14 2008-10-29 浙江工业大学 Modified chalk casing
CN201235670Y (en) * 2008-08-04 2009-05-13 哈布里哈克·依曼买提 Multifunctional chalk jacket
CN201693891U (en) * 2009-07-15 2011-01-05 李江 Blackboard writing device
CN103144470A (en) * 2013-03-05 2013-06-12 东华理工大学 Laser positioning compass
CN204567004U (en) * 2015-03-25 2015-08-19 贵州电子信息职业技术学院 A kind of portable environmental-protection Multifunctional chalk clamp
CN206049110U (en) * 2016-07-08 2017-03-29 梧州市工厂路小学 A kind of electronic device of tinting
CN206633660U (en) * 2016-09-09 2017-11-14 孙艳丽 A kind of single arm type laser positioning compass for math teaching
CN206589501U (en) * 2017-02-15 2017-10-27 刘正强 A kind of lettering pen

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