CN204375268U - Teaching appliance is understood in hyperbolic curve definition - Google Patents
Teaching appliance is understood in hyperbolic curve definition Download PDFInfo
- Publication number
- CN204375268U CN204375268U CN201520011668.6U CN201520011668U CN204375268U CN 204375268 U CN204375268 U CN 204375268U CN 201520011668 U CN201520011668 U CN 201520011668U CN 204375268 U CN204375268 U CN 204375268U
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- CN
- China
- Prior art keywords
- tape measure
- transverse slat
- chalk sleeve
- hyperbolic curve
- briquetting
- 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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- Instructional Devices (AREA)
Abstract
Teaching appliance is understood in hyperbolic curve definition, comprise transverse slat, the two ends of transverse slat are provided with the right flexible rule box of locking key and left flexible rule box respectively, and tape measure and the left flexible rule box tape measure of right flexible rule box are same tape measure, tape measure arranges chalk sleeve, chalk sleeve is offered three through holes, tape measure, through three through holes, chalk sleeve installs chalk, in chalk sleeve, briquetting is set, briquetting is positioned at the side of tape measure, and chalk sleeve arranged outside gland nut, tape measure is pressed to briquetting by gland nut.Transverse slat presses on blackboard by the utility model, and the two ends of transverse slat, as hyp focus, can adjust the length of tape measure, by gland nut and briquetting, tape measure is fixed, strain the tape measure through through hole, draw a hyperbolic curve on the top of transverse slat, so that student understands hyp general character.
Description
Technical field
The utility model belongs to math teaching aid field, and teaching appliance is understood in specifically a kind of hyperbolic curve definition.
Background technology
In high school mathematics teaching, " hyperbolic curve " is a chapter wherein.In these chapters and sections, first will say the definition of " hyperbolic curve ", then retell the character of " hyperbolic curve ".For the definition of " hyperbolic curve ", the track for equaling the point of fixed length in: plane to the difference of the distances of two fixed points can be said, be called hyperbolic curve.At present, teacher, when saying hyp definition, does not have special instrument, the understanding of inconvenient student.
Utility model content
The utility model provides the definition of a kind of hyperbolic curve to understand teaching appliance, in order to solve defect of the prior art.
The utility model is achieved by the following technical programs:
Teaching appliance is understood in hyperbolic curve definition, comprise transverse slat, the two ends of transverse slat are provided with the right flexible rule box of locking key and left flexible rule box respectively, and tape measure and the left flexible rule box tape measure of right flexible rule box are same tape measure, tape measure arranges chalk sleeve, chalk sleeve is offered three through holes, tape measure, through three through holes, chalk sleeve installs chalk, in chalk sleeve, briquetting is set, briquetting is positioned at the side of tape measure, and chalk sleeve arranged outside gland nut, tape measure is pressed to briquetting by gland nut.
Teaching appliance is understood in hyperbolic curve definition as above, described transverse slat comprises the shell that two ends arrange opening, in the middle part of shell, gear is installed, the rotating shaft of gear connects turn-button, the upper and lower of gear coordinates upper rack and lower tooth bar respectively, the end of upper rack connects left extension rod, and the end of lower tooth bar connects right extension rod, and left extension rod and right extension rod stretch out shell.
Teaching appliance is understood in hyperbolic curve definition as above, and described tape measure arranges scale.
Hyperbolic curve definition as above understands teaching appliance, mounting handle on described transverse slat.
The utility model has the advantages that: transverse slat presses on blackboard by the utility model, the two ends of transverse slat are as hyp focus, the length of tape measure can be adjusted, by gland nut and briquetting, tape measure is fixed, strain the tape measure through through hole, a hyperbolic curve is drawn, so that student understands hyp general character on the top of transverse slat.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model; Fig. 2 be along Fig. 1 A-A line analyse and observe structure for amplifying schematic diagram.
Reference numeral: right extension rod 6 upper rack 7 shell 8 of 1 left extension rod 2 times tooth bar 3 turn-button 4 gear 5 right flexible rule box 9 locking key 10 tape measure 11 chalk sleeve 12 through hole 13 chalk 14 handle 15 gland nut 16 briquetting about 17 flexible rule box.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Teaching appliance is understood in hyperbolic curve definition, as depicted in figs. 1 and 2, comprise transverse slat, the two ends of transverse slat are provided with right flexible rule box 8 and the left flexible rule box 17 of locking key 9 respectively, tape measure 10 and left flexible rule box 17 tape measure 10 of right flexible rule box 8 are same tape measure, tape measure 10 is arranged chalk sleeve 11, chalk sleeve 11 is offered three through holes 12, tape measure 10 is through three through holes 12, chalk sleeve 11 is installed chalk 13, arrange briquetting 16 in chalk sleeve 11, briquetting 16 is positioned at the side of tape measure 10, chalk sleeve 11 arranged outside gland nut 15, tape measure 10 is pressed to briquetting 16 by gland nut 15.According to hyperbolic curve definition, because summit is definite value to the absolute value of the range difference of hyperbolic curve bifocal, after the part doubling that tape measure 10 is drawn in by chalk sleeve 11, the end points after folding is placed in mid point.So pull chalk sleeve 11 behind the position determining the end points after rolling over, then chalk sleeve 11 remains constant to the absolute value of the range difference of left focus and right focus.
Specifically, the hyperbolic curve of the spacing of different focus is understood in order to strengthen student further, transverse slat described in the present embodiment comprises the shell 7 that two ends arrange opening, gear 4 is installed in the middle part of shell 7, the rotating shaft of gear 4 connects turn-button 3, and the upper and lower of gear 4 coordinates upper rack 6 and lower tooth bar 2 respectively, and the end of upper rack 6 connects left extension rod 1, the end of lower tooth bar 2 connects right extension rod 5, and left extension rod 1 and right extension rod 5 stretch out shell 7.Rotate turn-button 3 gear 4 and can make upper rack 6 and lower tooth bar 2 is synchronous stretches out to both sides or regain, thus left extension rod 1 and right extension rod 5 are stretched out to both sides or regains, thus adjust the distance between focus.
Concrete, the tape measure 10 described in the present embodiment arranges scale, the distance between hyperbolic distance 2 can be read.
Further, mounting handle 14 on the transverse slat described in the present embodiment.Handle 14 can conveniently be taken the utility model.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (4)
1. teaching appliance is understood in hyperbolic curve definition, it is characterized in that: comprise transverse slat, the two ends of transverse slat are provided with right flexible rule box (8) and the left flexible rule box (17) of locking key (9) respectively, the tape measure (10) of right flexible rule box (8) and left flexible rule box (17) tape measure (10) are same tape measure, tape measure (10) is arranged chalk sleeve (11), chalk sleeve (11) is offered three through holes (12), tape measure (10) is through three through holes (12), chalk sleeve (11) is installed chalk (13), briquetting (16) is set in chalk sleeve (11), briquetting (16) is positioned at the side of tape measure (10), chalk sleeve (11) arranged outside gland nut (15), tape measure (10) is pressed to briquetting (16) by gland nut (15).
2. teaching appliance is understood in hyperbolic curve definition according to claim 1, it is characterized in that: described transverse slat comprises the shell (7) that two ends arrange opening, gear (4) is installed at shell (7) middle part, the rotating shaft of gear (4) connects turn-button (3), the upper and lower of gear (4) coordinates upper rack (6) and lower tooth bar (2) respectively, the end of upper rack (6) connects left extension rod (1), the end of lower tooth bar (2) connects right extension rod (5), and left extension rod (1) and right extension rod (5) stretch out shell (7).
3. teaching appliance is understood in hyperbolic curve definition according to claim 1, it is characterized in that: described tape measure (10) arranges scale.
4. teaching appliance is understood in hyperbolic curve definition according to claim 1, it is characterized in that: mounting handle (14) on described transverse slat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520011668.6U CN204375268U (en) | 2015-01-08 | 2015-01-08 | Teaching appliance is understood in hyperbolic curve definition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520011668.6U CN204375268U (en) | 2015-01-08 | 2015-01-08 | Teaching appliance is understood in hyperbolic curve definition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204375268U true CN204375268U (en) | 2015-06-03 |
Family
ID=53331465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520011668.6U Expired - Fee Related CN204375268U (en) | 2015-01-08 | 2015-01-08 | Teaching appliance is understood in hyperbolic curve definition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204375268U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108248255A (en) * | 2018-01-29 | 2018-07-06 | 合肥托卡拉图科技有限公司 | One kind is used to precisely make hyp tool gauge |
-
2015
- 2015-01-08 CN CN201520011668.6U patent/CN204375268U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108248255A (en) * | 2018-01-29 | 2018-07-06 | 合肥托卡拉图科技有限公司 | One kind is used to precisely make hyp tool gauge |
| CN108248255B (en) * | 2018-01-29 | 2019-12-06 | 浙江苏明阀门有限公司 | tool gauge for accurately manufacturing hyperbola |
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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: 20150603 Termination date: 20160108 |