CN204172558U - A kind of dotted line boost line drawing tool - Google Patents
A kind of dotted line boost line drawing tool Download PDFInfo
- Publication number
- CN204172558U CN204172558U CN201420643745.5U CN201420643745U CN204172558U CN 204172558 U CN204172558 U CN 204172558U CN 201420643745 U CN201420643745 U CN 201420643745U CN 204172558 U CN204172558 U CN 204172558U
- Authority
- CN
- China
- Prior art keywords
- gear
- bar
- microswitch
- push
- wheel
- 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.)
- Expired - Fee Related
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a kind of dotted line boost line drawing tool, belong to several teaching apparatus.This instrument comprises straight-bar, the first gear, the second gear, microswitch, bush of chalk and power supply; Described straight-bar two ends are respectively equipped with a wheel, and the wheel shaft of one of them wheel drives the first pinion rotation; Described second gear and the first gear engage each other; Described second gear is provided with semicircle projection; The cambered surface of described semicircle projection acts on the button of microswitch; Described straight-bar is provided with push-pull electromagnet; Described bush of chalk is connected with the pull bar of push-pull electromagnet; Described push-pull electromagnet is connected with power supply by microswitch.The utility model is convenient to teacher on blackboard, is drawn out dotted line boost line attractive in appearance, is conducive to the effect improving classroom instruction.
Description
Technical field
The utility model relates to a kind of dotted line boost line drawing tool, belongs to several teaching apparatus.
Background technology
Boost line is the lines for analyzed pattern conventional in geometry, and in order to distinguish with the lines of former figure, the auxiliary dotted line that usually adopts is drawn.In several teaching process, teacher usually will draw dotted line boost line on blackboard, helps student and understands geometric figure, but, owing to lacking special drawing tool, the dotted line boost line that teacher draws out is often attractive in appearance not, and this just have impact on the effect of classroom instruction.
Utility model content
The utility model, for the problem in background technology, proposes a kind of dotted line boost line drawing tool.
The utility model, for overcoming the above problems, adopts following technical scheme:
A kind of dotted line boost line drawing tool, comprises straight-bar, the first gear, the second gear, microswitch, bush of chalk and power supply; Described straight-bar two ends are respectively equipped with a wheel, and the wheel shaft of one of them wheel drives the first pinion rotation; Described second gear and the first gear engage each other; Described second gear is provided with semicircle projection; The cambered surface of described semicircle projection acts on the button of microswitch; Described straight-bar is provided with push-pull electromagnet; Described bush of chalk is connected with the pull bar of push-pull electromagnet; Described push-pull electromagnet is connected with power supply by microswitch.
As scheme optimization, the utility model also comprises a handspike be connected with straight-bar.
Preferably, described power acquisition lithium battery.
Preferably, described wheel adopts directional wheel.
Technique effect:
1, the utility model is convenient to teacher on blackboard, is drawn out dotted line boost line attractive in appearance, is conducive to the effect improving classroom instruction.
2, a dotted line boost line can be drawn out by promotion instrument, easy to operate, quick, be adapted at each school and promote.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the state diagram of bush of chalk when being pushed out.
Label title in Fig. 1 ~ Fig. 2: 1, straight-bar; 2, wheel; 3, the first gear; 4, the second gear; 5, semicircle projection; 6, microswitch; 7, push-pull electromagnet; 8, bush of chalk; 9, power supply; 10, handspike; 11, chalk.
Detailed description of the invention
Below in conjunction with accompanying drawing, introduction is in further detail done to the technical solution of the utility model:
Structure of the present utility model as shown in Figure 1, comprises straight-bar 1, first gear 3, second gear 4, microswitch 6, bush of chalk 8 and power supply 9; Described straight-bar 1 two ends are respectively equipped with a wheel 2, and the wheel shaft of one of them wheel 2 drives the first gear 3 to rotate; Described second gear 4 and the first gear 3 engage each other; Described second gear 4 is provided with semicircle projection 5; The cambered surface of described semicircle projection 5 acts on the button of microswitch 6; Described straight-bar 1 is provided with push-pull electromagnet 7; Described bush of chalk 8 is connected with the pull bar of push-pull electromagnet 7; Described push-pull electromagnet 7 is connected with power supply 9 by microswitch 6.
The utility model also comprises a handspike 10 be connected with straight-bar 1, and teacher can promote instrument easily by handspike 10.
Described power supply 9 adopts lithium battery, powers for giving push-pull electromagnet 7.
Described wheel 2 adopts directional wheel, and teacher carries out in the process of line drawing at promotion instrument, and wheel 2 there will not be and turns to.
The wheel shaft of described second gear 4 is connected with the center of circle of semicircle projection 5, and semicircle projection 5 can be driven when the second gear 4 rotates to rotate; Described bush of chalk 8 is tubular structure, and its internal diameter is equal with the external diameter of chalk, for being fixed chalk.
Described push-pull electromagnet 7 adopts the KCT52/86 of the triumphant peaceful automatic control device factory in Nanjing.When push-pull electromagnet is energized, the pull bar of push-pull electromagnet can be retracted; When push-pull electromagnet power-off, the pull bar of push-pull electromagnet can stretch out.
Described microswitch 6 adopts the SS-5GL2 of Omron Corp.When the button of microswitch is depressed, the closing of contact of microswitch; When the button of microswitch is upspring, the contact of microswitch disconnects.
When drawing boost line, chalk 11 is first fixed on bush of chalk 8 by teacher, then chalk 11 is aimed at one end of boost line to be drawn, afterwards, teacher promotes instrument and moves ahead on blackboard, wheel 2 drives the first gear 3 to rotate when rotating, the second gear 4 engaged with the first gear 3 also starts to rotate, and drives semicircle projection 5 to rotate together simultaneously.When the cambered surface of semicircle projection 5 goes to away from microswitch 6 side, the cambered surface of semicircle projection 5 not with the button contacts of microswitch 6, the contact of microswitch 6 disconnects, now, push-pull electromagnet and power supply disconnect, bush of chalk 8 is released by the pull bar of push-pull electromagnet, thus chalk 11 is contacted with blackboard, can leave segment lines (as shown in Figure 2) in chalk advance process on blackboard; When the cambered surface of semicircle projection 5 goes to microswitch 6 side, the cambered surface of semicircle projection 5 is by the button down of microswitch 6, the closing of contact of microswitch 6, now, push-pull electromagnet and power supply are connected, bush of chalk 8 retracts by the pull bar of push-pull electromagnet, thus chalk 11 is not contacted with blackboard, can not leave a trace (as shown in Figure 1) in chalk advance process on blackboard.So, teacher only need promote instrument and move ahead on blackboard, chalk will automatically on blackboard compartment of terrain draw multiple segment lines, thus complete a dotted line boost line attractive in appearance.
Claims (4)
1. a dotted line boost line drawing tool, is characterized in that: comprise straight-bar (1), the first gear (3), the second gear (4), microswitch (6), bush of chalk (8) and power supply (9); Described straight-bar (1) two ends are respectively equipped with a wheel (2), and the wheel shaft of one of them wheel (2) drives the first gear (3) to rotate; Described second gear (4) and the first gear (3) engage each other; Described second gear (4) is provided with semicircle projection (5); The cambered surface of described semicircle projection (5) acts on the button of microswitch (6); Described straight-bar (1) is provided with push-pull electromagnet (7); Described bush of chalk (8) is connected with the pull bar of push-pull electromagnet (7); Described push-pull electromagnet (7) is connected with power supply (9) by microswitch (6).
2. a kind of dotted line boost line drawing tool according to claim 1, is characterized in that: also comprise a handspike (10) be connected with straight-bar (1).
3. a kind of dotted line boost line drawing tool according to claim 1, is characterized in that: described power supply (9) adopts lithium battery.
4. a kind of dotted line boost line drawing tool according to claim 1, is characterized in that: described wheel (2) adopts directional wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643745.5U CN204172558U (en) | 2014-11-03 | 2014-11-03 | A kind of dotted line boost line drawing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643745.5U CN204172558U (en) | 2014-11-03 | 2014-11-03 | A kind of dotted line boost line drawing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204172558U true CN204172558U (en) | 2015-02-25 |
Family
ID=52561394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420643745.5U Expired - Fee Related CN204172558U (en) | 2014-11-03 | 2014-11-03 | A kind of dotted line boost line drawing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204172558U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112428726A (en) * | 2020-11-27 | 2021-03-02 | 绥化学院 | Plotter for applied mathematics teaching |
-
2014
- 2014-11-03 CN CN201420643745.5U patent/CN204172558U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112428726A (en) * | 2020-11-27 | 2021-03-02 | 绥化学院 | Plotter for applied mathematics teaching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20151103 |
|
| EXPY | Termination of patent right or utility model |