CN104786696A - Multifunctional chalk protecting device - Google Patents
Multifunctional chalk protecting device Download PDFInfo
- Publication number
- CN104786696A CN104786696A CN201510175059.9A CN201510175059A CN104786696A CN 104786696 A CN104786696 A CN 104786696A CN 201510175059 A CN201510175059 A CN 201510175059A CN 104786696 A CN104786696 A CN 104786696A
- Authority
- CN
- China
- Prior art keywords
- chalk
- micromotor
- protective device
- multifunctional
- fixedly installed
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
- B43K23/016—Holders for crayons or chalks
Abstract
The invention discloses a multifunctional chalk protecting device. The multifunctional chalk protecting device at least comprises a rod-shaped shell capable of containing chalk, a clamping assembly clamping the chalk, and a driving device used for driving the chalk to move forwards in the axial direction when backward force is applied to the axial direction of the chalk. The clamping assembly and the driving device are arranged in the shell. When a teacher writes on a blackboard, the backward acting force is applied to the axial direction of the chalk. A pressure sensor detects the acting force applied to the chalk by the blackboard. The driving device is used for making the chalk clamped by the clamping assembly to be driven to stretch out in the axial direction, and therefore the chalk stretches out when consumed; when writing is not performed, the chalk does not automatically stretch out any more, it is guaranteed that the exposed segment of the chalk at the front end of the protecting device is at a proper length, the teacher can write conveniently, the chalk cannot be broken easily, waste of the chalk and waste of the time of the teacher are avoided, and the health of the teacher and students is guaranteed.
Description
Technical field
The present invention relates to a kind of teaching aid, more specifically to a kind of multifunctional chalk protective device.
Background technology
The main component of chalk is gypsum, at present, on most schools classroom, teacher is the writing on the blackboard of free-hand use chalk-writing, and the chemical composition of chalk is alkaline matter, teacher can cause skin of palm of hand angling in Long-Time Service contact, chap and refer to the symptoms such as distortion (spoon first), the chalk dust of full hand brings inconvenience also can to the action of teacher, such as go up and use handspring book class hour, drink water, chalk dust is easily made to cause indirect pollution, affect the health etc. of teacher, and, chalk is shaft-like, axially easily cause the fracture of the chalk when writing due to unbalance stress, while having a strong impact on teaching process, also larger impact is shone on the utilization ratio of chalk, although have now some to point other protective device, can ensure that the finger of teacher does not directly contact with chalk, the both hands of teacher are avoided not to be corroded, but chalk not frangibility and easy to use can not be avoided simultaneously, often need the extension elongation of manual adjustments chalk after use one section of chalk, have impact on the thinking of attending class of the progress of attending class and teacher.
Therefore, for above-mentioned problem, be necessary to provide a kind of multifunctional chalk protective device, can avoid chalk when writing, not while frangibility, ensures easy to use, exposes the length of protective device without the need to manual adjustments chalk, convenient when making to use.
Summary of the invention
The technical problem that the present invention mainly solves is: provide a kind of multifunctional chalk protective device, can avoid chalk when writing, not while frangibility, to ensure easy to use, expose the length of protective device without the need to manual adjustments chalk, convenient when making to use.
For solving the problems of the technologies described above; the present invention relates to a kind of multifunctional chalk protective device; at least comprise shaft-like housing, the clamping clamp assemblies of chalk, the chalk that can hold chalk axially stressed backward time for driving chalk axially proal drive unit, described clamp assemblies and drive unit are arranged in housing.
Further, described drive unit comprise can along chalk in axial sliding chalk pushing block, drive chalk pushing block micromotor, by the power transmission of micromotor to the transmission component of briquetting and the controller being used for driving micromotor, described pushing block is provided with pressure sensor, the output of described pressure sensor is connected with the input of described controller, and the output of described controller is connected with the control input end of micromotor.
Further, described transmission component is comprised and to coordinate with described chalk pushing block sidewall thread and the axial restraint power transmission shaft that is arranged at chalk pushing block and the helical pitch screw mandrel between housing, coordinated by belt wheel transmission with helical pitch screw mandrel, and the power output shaft of described micromotor is connected with transmission shaft driven by the inside engaged gear that is fixedly installed on power transmission shaft.
Further, also comprise and be provided with the resetting-mechanism that SR triggers micromotor startup, described resetting-mechanism also comprises tumbler gear, external gear pump and shift fork, described inside engaged gear is fixedly installed on power transmission shaft, described tumbler gear circumference is fixedly installed on the power output shaft of micromotor, and described shift fork makes tumbler gear engage with external gear pump or inside engaged gear for driving tumbler gear along the axial reciprocating slip of the power output shaft of micromotor.
Further, described shell inner surface is fixedly installed clutch shaft bearing seat, described clutch shaft bearing seat is fixedly installed clutch shaft bearing, the power output shaft of described micromotor is rotationally connected by clutch shaft bearing and clutch shaft bearing seat, be provided with the spring for tumbler gear being pressed on inside engaged gear between described clutch shaft bearing and tumbler gear, described spring overcoat is in the power output shaft of micromotor.
Further, the middle part of described power transmission shaft and afterbody are provided with the second bearing and the 3rd bearing, and described second bearing and the 3rd bearing are fixed by the corresponding bearing block being fixedly installed on inner walls.
Further, described helical pitch screw mandrel is two, and arranges along the radial symmetric of housing.
Further, the front end of described housing is hollow-cone mesa-shaped, described clamp assemblies comprises " 6 " shape flexure strip that front end is fixedly installed on inner walls forward position, and described flexure strip is four and arranges along inner walls circumference, and rear end and the described inner walls of described flexure strip are slidably connected; Be provided with between described housing and flexure strip for increasing the O type rubber washer of flexure strip to chalk chucking power.
Further, described inner walls axial restraint is provided with the slideway of two radial symmetric, and the cross section of described two slideways is arc and the stub end of chalk is snug fit between two slideways.
Further, described slideway jackshaft is to being provided with mounting groove, and described mounting groove internal fixtion is provided with the elastic threads of the variable diameter for extruding chalk sidewall.
The invention has the beneficial effects as follows: a kind of multifunctional chalk protective device disclosed by the invention, be a teacher when writing on blackboard, make the active force that the axis of chalk is subject to backward, pressure sensor detects the active force of blackboard suffered by chalk, and by drive unit, axial for the chalk clamped by clamp assemblies driving is stretched out, make chalk while consumption, also stretch out outward simultaneously, when not writing, chalk is auto-extending no longer, ensure that the chalk of protective device front end exposes the individual suitable length of Duan Yi, be convenient to teacher write and chalk not frangibility, avoid waste and teacher's waste of time of chalk, ensure the health of Faculty and Students.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of inner races of the present invention;
Fig. 3 is control circuit structural representation of the present invention.
Detailed description of the invention
Fig. 1 is structural representation of the present invention, Fig. 2 is the structural representation of inner races of the present invention, Fig. 3 is control circuit structural representation of the present invention, as shown in the figure, a kind of multifunctional chalk protective device in the present embodiment, at least comprise shaft-like housing 1, the clamping clamp assemblies of chalk, the chalk that can hold chalk axially stressed backward time for driving chalk axially proal drive unit, described clamp assemblies and drive unit are arranged in housing 1, certainly, described housing 1 side is provided with the handling opening 2 for putting into chalk, and described handling opening 2 is provided with slide or hinged door, and described protective device axially-aligned can place at least two chalks, front end represents chalk (or protective device) one end towards blackboard, be a teacher when writing on blackboard, make the active force that the axis of chalk is subject to backward, available pressure sensor 33 detects the active force of blackboard suffered by chalk, and by drive unit, axial for the chalk clamped by clamp assemblies driving is stretched out, make chalk while consumption, also stretch out outward simultaneously, when not writing, chalk is auto-extending no longer, ensure that the chalk of protective device front end exposes the individual suitable length of Duan Yi, be convenient to teacher write and chalk not frangibility, avoid waste and teacher's waste of time of chalk.
In the present embodiment, described drive unit comprise can along chalk in axial sliding chalk pushing block 31, drive chalk pushing block 31 micromotor 32, by the power transmission of micromotor 32 to the transmission component of briquetting and the controller being used for driving micromotor 32, described pushing block is provided with pressure sensor 33, the output of described pressure sensor 33 is connected with the input of described controller, and the output of described controller is connected with the control input end of micromotor 32; Described housing 1 tail end arranges the power supply that promising micromotor 32, controller and pressure sensor 33 provide electric energy; described chalk pushing block 31 is arranged at chalk rear end; the power of the pressure signal that controller can receive according to pressure sensor 33 judges the size of force value; and according to pressure is different, the rotating speed of adaptive control micromotor 32 exports; avoid owing to using the difference of dynamics to cause that chalk consumption degree is different and error that is that bring is excessive, ensure to make the chalk section exposing protective device to remain on the scope of a not frangibility.
In the present embodiment, described transmission component is comprised and to coordinate with described chalk pushing block 31 sidewall thread and the axial restraint power transmission shaft 35 that is arranged at helical pitch screw mandrel 34a between chalk pushing block 31 with housing 1, coordinated by belt wheel 6 transmission with helical pitch screw mandrel 34a, and the power output shaft of described micromotor 32 is fixedly installed on the inside engaged gear 36 of power transmission shaft 35 by one and power transmission shaft 35 is in transmission connection; It is inner that described micromotor 32 is fixedly installed housing 1, effectively gearratio can be regulated by inside engaged gear 36 and belt wheel 6, the rear and front end of described helical pitch screw mandrel 34a is provided with bearing and installs, chalk pushing block 31 is driven by helical pitch screw mandrel 34a, the good linearity that chalk pushing block 31 is moved and the thrust be subject to are large, ensure that chalk can be released smoothly and chalk is not fractureed.
In the present embodiment, also comprise and be provided with the resetting-mechanism that SR triggers micromotor 32 startup, described resetting-mechanism also comprises tumbler gear 37, external gear pump 38 and shift fork 39, described external gear pump 38 is fixedly installed on power transmission shaft 35, described tumbler gear 37 circumference is fixedly installed on the power output shaft of micromotor 32, and described shift fork 39 makes tumbler gear 37 engage with external gear pump 38 or inside engaged gear 36 for driving tumbler gear 37 along the axial reciprocating slip of the power output shaft of micromotor 32; Make power transmission shaft 35 can forward and backward by tumbler gear 37, ensure that pushing block can move forward or backward, and the gearratio of external gear pump 38 is rationally set, chalk pushing block 31 can be made to move backward fast, conveniently install chalk additional, described shift fork 39 is prior art, does not repeat them here.
In the present embodiment, described housing 1 inner surface is fixedly installed clutch shaft bearing seat, described clutch shaft bearing seat is fixedly installed clutch shaft bearing, the power output shaft of described micromotor 32 is rotationally connected by clutch shaft bearing and clutch shaft bearing seat, be provided with the spring 8 for tumbler gear 37 being pressed on inside engaged gear 36 between described clutch shaft bearing and tumbler gear 37, described spring 8 is coated at the power output shaft of micromotor 32; Described shift fork 39 end is provided with SR, the control output end of described SR is connected with described controller and is used for when button is pressed, start micromotor 32, SR is also fixedly connected with a wedge by a lever, as shown in Figure 1, utilize the inclined-plane of described wedge make tumbler gear 37 overcome spring elastic force and with external gear pump 38 engaged transmission, being provided with of spring is beneficial to tumbler gear 37 and is combined with inside engaged gear 36 or external gear pump 38 stable, ensures transmission efficiency.
In the present embodiment, the middle part of described power transmission shaft 35 and afterbody are provided with the second bearing and the 3rd bearing, and described second bearing and the 3rd bearing are fixed by the corresponding bearing block being fixedly installed on housing 1 inwall; By the setting of clutch shaft bearing and the 3rd bearing, effectively can ensure the parallel of the power output shaft of power transmission shaft 35 and micromotor 32, ensure transmission efficiency, when reducing not parallel, cause the impact of additional moment.
In the present embodiment, described helical pitch screw mandrel is two (34a and 34b), and arrange along the radial symmetric of housing 1, by the setting of two helical pitch screw mandrels, effectively can ensure the driving force of chalk pushing block 31, avoid the unbalance stress of chalk pushing block 31 simultaneously and cause bite, ensureing the smooth and easy slip of chalk pushing block 31.
In the present embodiment, the front end of described housing 1 is hollow-cone mesa-shaped, described clamp assemblies comprises " 6 " shape flexure strip 4 that front end is fixedly installed on housing 1 inwall forward position, described flexure strip 4 is four and arranges along housing 1 inwall circumference, and rear end and described housing 1 inwall of described flexure strip 4 are slidably connected; The O type rubber washer 5 for increasing flexure strip 4 pairs of chalk chucking powers is provided with between described housing 1 and flexure strip 4; Described flexure strip 4 can be elastic steel sheet, described " 6 " property flexure strip 4 is that the back segment of elastic steel sheet radially outward curls into housing 1, crimping segment and housing 1 inwall are slidably connected, by elasticity and the guide effect of flexure strip 4, and coordinate the collaborative of O type rubber washer 5, can by the chalk front end stable holding of different-diameter.
In the present embodiment, described housing 1 inwall axial restraint is provided with the slideway (6a and 6b) of two radial symmetric, the cross section of described two slideways is arc and the stub end of chalk is snug fit between two slideways, the gap for installing helical pitch screw mandrel is provided with between described two slip circumferences, described slideway the alignment that can ensure chalk and housing 1 is set, avoid chalk frangibility.
In the present embodiment, described slideway jackshaft is to being provided with mounting groove, described mounting groove internal fixtion is provided with the elastic threads (being respectively 7a and 7b) of the variable diameter for extruding chalk sidewall, fitted in the sidewall of chalk by radial deformation by elastic threads, the stability of further guarantee chalk entirety, avoids chalk axially loaded uneven and causes fracture.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. a multifunctional chalk protective device; it is characterized in that: at least comprise shaft-like housing, the clamping clamp assemblies of chalk, the chalk that can hold chalk axially stressed backward time for driving chalk axially proal drive unit, described clamp assemblies and drive unit are arranged in housing.
2. multifunctional chalk protective device according to claim 1; it is characterized in that: described drive unit comprise can along chalk in axial sliding chalk pushing block, drive chalk pushing block micromotor, by the power transmission of micromotor to the transmission component of briquetting and the controller being used for driving micromotor; described pushing block is provided with pressure sensor; the output of described pressure sensor is connected with the input of described controller, and the output of described controller is connected with the control input end of micromotor.
3. multifunctional chalk protective device according to claim 2; it is characterized in that: described transmission component is comprised and to coordinate with described chalk pushing block sidewall thread and the axial restraint power transmission shaft that is arranged at chalk pushing block and the helical pitch screw mandrel between housing, coordinated by belt wheel transmission with helical pitch screw mandrel, and the power output shaft of described micromotor is connected with transmission shaft driven by the inside engaged gear that is fixedly installed on power transmission shaft.
4. multifunctional chalk protective device according to claim 3; it is characterized in that: also comprise and be provided with the resetting-mechanism that SR triggers micromotor startup; described resetting-mechanism also comprises tumbler gear, external gear pump and shift fork; described inside engaged gear is fixedly installed on power transmission shaft; described tumbler gear circumference is fixedly installed on the power output shaft of micromotor, and described shift fork makes tumbler gear engage with external gear pump or inside engaged gear for driving tumbler gear along the axial reciprocating slip of the power output shaft of micromotor.
5. multifunctional chalk protective device according to claim 4; it is characterized in that: described shell inner surface is fixedly installed clutch shaft bearing seat; described clutch shaft bearing seat is fixedly installed clutch shaft bearing; the power output shaft of described micromotor is rotationally connected by clutch shaft bearing and clutch shaft bearing seat; be provided with the spring for tumbler gear being pressed on inside engaged gear between described clutch shaft bearing and tumbler gear, described spring overcoat is in the power output shaft of micromotor.
6. multifunctional chalk protective device according to claim 3; it is characterized in that: the middle part of described power transmission shaft and afterbody are provided with the second bearing and the 3rd bearing, described second bearing and the 3rd bearing are fixed by the corresponding bearing block being fixedly installed on inner walls.
7. multifunctional chalk protective device according to claim 3, is characterized in that: described helical pitch screw mandrel is two, and arranges along the radial symmetric of housing.
8. multifunctional chalk protective device according to claim 1, it is characterized in that: the front end of described housing is hollow-cone mesa-shaped, described clamp assemblies comprises " 6 " shape flexure strip that front end is fixedly installed on inner walls forward position, described flexure strip is four and arranges along inner walls circumference, and rear end and the described inner walls of described flexure strip are slidably connected; Be provided with between described housing and flexure strip for increasing the O type rubber washer of flexure strip to chalk chucking power.
9. multifunctional chalk protective device according to claim 8; it is characterized in that: described inner walls axial restraint is provided with the slideway of two radial symmetric, the cross section of described two slideways is arc and the stub end of chalk is snug fit between two slideways.
10. multifunctional chalk protective device according to claim 9, is characterized in that: described slideway jackshaft is to being provided with mounting groove, and described mounting groove internal fixtion is provided with the elastic threads of the variable diameter for extruding chalk sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510175059.9A CN104786696B (en) | 2015-04-14 | 2015-04-14 | Multifunctional chalk protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510175059.9A CN104786696B (en) | 2015-04-14 | 2015-04-14 | Multifunctional chalk protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104786696A true CN104786696A (en) | 2015-07-22 |
| CN104786696B CN104786696B (en) | 2016-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510175059.9A Active CN104786696B (en) | 2015-04-14 | 2015-04-14 | Multifunctional chalk protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104786696B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042722A (en) * | 2016-07-02 | 2016-10-26 | 深圳市中幼国际教育科技有限公司 | Portable chalk clamping device for teaching |
| CN108573817A (en) * | 2017-03-09 | 2018-09-25 | 香港中文大学 | Tri compound flexible electrode, flexible super capacitor and their preparation method and device |
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| CN201856495U (en) * | 2010-10-28 | 2011-06-08 | 汪靖席 | Chalk sleeve convenient in use |
| CN202151963U (en) * | 2011-08-04 | 2012-02-29 | 张晟廷 | Chalk sleeve |
| CN202986464U (en) * | 2012-12-26 | 2013-06-12 | 中国矿业大学 | Novel chalk sleeve |
| CN203496498U (en) * | 2013-10-12 | 2014-03-26 | 韩霞 | Improved chalk sleeve |
| CN203496497U (en) * | 2013-10-12 | 2014-03-26 | 殷允苏 | Automatic telescopic chalk sleeve |
| CN203511045U (en) * | 2013-10-30 | 2014-04-02 | 赵振蕾 | Chalk sleeve |
| CN203920109U (en) * | 2014-06-19 | 2014-11-05 | 何建慧 | A kind of clamper for chalk-writing |
| CN204526505U (en) * | 2015-04-14 | 2015-08-05 | 重庆交通大学 | Automatic chalk protective device |
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2015
- 2015-04-14 CN CN201510175059.9A patent/CN104786696B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201856495U (en) * | 2010-10-28 | 2011-06-08 | 汪靖席 | Chalk sleeve convenient in use |
| CN202151963U (en) * | 2011-08-04 | 2012-02-29 | 张晟廷 | Chalk sleeve |
| CN202986464U (en) * | 2012-12-26 | 2013-06-12 | 中国矿业大学 | Novel chalk sleeve |
| CN203496498U (en) * | 2013-10-12 | 2014-03-26 | 韩霞 | Improved chalk sleeve |
| CN203496497U (en) * | 2013-10-12 | 2014-03-26 | 殷允苏 | Automatic telescopic chalk sleeve |
| CN203511045U (en) * | 2013-10-30 | 2014-04-02 | 赵振蕾 | Chalk sleeve |
| CN203920109U (en) * | 2014-06-19 | 2014-11-05 | 何建慧 | A kind of clamper for chalk-writing |
| CN204526505U (en) * | 2015-04-14 | 2015-08-05 | 重庆交通大学 | Automatic chalk protective device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106042722A (en) * | 2016-07-02 | 2016-10-26 | 深圳市中幼国际教育科技有限公司 | Portable chalk clamping device for teaching |
| CN106042722B (en) * | 2016-07-02 | 2018-11-09 | 深圳市中幼国际教育科技有限公司 | A kind of Portable teaching chalk clamping device |
| CN108573817A (en) * | 2017-03-09 | 2018-09-25 | 香港中文大学 | Tri compound flexible electrode, flexible super capacitor and their preparation method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104786696B (en) | 2016-08-17 |
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