CN2146897Y - Nearsight proof frame - Google Patents
Nearsight proof frame Download PDFInfo
- Publication number
- CN2146897Y CN2146897Y CN 93202850 CN93202850U CN2146897Y CN 2146897 Y CN2146897 Y CN 2146897Y CN 93202850 CN93202850 CN 93202850 CN 93202850 U CN93202850 U CN 93202850U CN 2146897 Y CN2146897 Y CN 2146897Y
- Authority
- CN
- China
- Prior art keywords
- slot
- support plate
- board
- utility
- riser
- 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 relates to a short sight proof frame which can be used as a drawing tool. The utility model adopts a vertical board and a support board with scale, wherein, the vertical board is an upright ruler, one end of the middle part of the vertical board is provided with a slot; the middle part of one side of the support board is provided with a slot, and the support board can adopt a protractor, or a set square, or a rectangular board. The vertical board and the support board which are combined together are placed on a desk, below the lower jaw of a student, so the distance of the eyes and books of the student can be kept at a certain distance all the time when the student reads books, achieving the effect of preventing from short sight.
Description
This utility model relates to a kind of myopia-preventing frame.
For the myopia-preventing frame of students in middle and primary schools' use, structure is comparatively simple at present, adopts frame plate to be supported under those who read and write's the chin, makes eyes and written maintaining a certain distance, and reach the effect of pre-myopia prevention, but its function is comparatively single.
Order of the present utility model is to provide a kind of myopia-preventing frame that drawing instrument uses that can be used as.
The purpose of this utility model is achieved in that adopting two has graduated riser and support plate, and riser is a rectangular slab, and one end middle part is provided with slot, and support plate is provided with slot in the middle part on one side, and riser and support plate can be plug-in.
Accompanying drawing 1 is this utility model riser sketch map.
Accompanying drawing 2,4,6 adopts protractor, set square and rectangular slab sketch map for this utility model support plate.
Accompanying drawing 3,5,7 is riser and support plate plug-in mounting sketch map.
Accompanying drawing 8 is provided with the groove sketch map for this utility model riser one end.
The length of this utility model riser 1 is the ruler of 18-28cm, and its other end is provided with a groove 5, and support plate 2 is a protractor, and slot 4 is located at the middle part of the semi-circle edge of protractor 2.
This utility model in use, with support plate 2(protractor, set square or rectangular slab) slot 4 upwards, stand up on the table, with support plate 1 is that the slot 3 of ruler is downward, plugs together promptly to be combined into, and places on the table, when seeing written word, it is placed on down chin down,, adds general human eye and 11 centimetres of following chin distances if ruler is high 22 centimetres, add up to about 33 centimetres, the student makes eyes and books keep certain distance (about 1 chi) when seeing written word all the time like this, thereby reaches the effect of pre-myopia prevention.
Claims (5)
1, a kind of myopia-preventing frame is characterized in that comprising having graduated riser 1 and support plate 2 that riser 1 is a rectangular slab, and one end middle part is provided with slot 3, and support plate 2 middle part on one side is provided with slot 4, and riser 1 and support plate 2 can be plug-in.
2, a kind of myopia-preventing frame according to claim 1 is characterized in that riser 1 is that length is the ruler of 18-28cm, and its other end is provided with a groove 5.
3, a kind of myopia-preventing frame according to claim 1 and 2 is characterized in that support plate 2 is protractor, and slot 4 is located at the middle part of the semi-circle edge of protractor 2.
4, a kind of myopia-preventing frame according to claim 1 and 2 is characterized in that support plate 2 is set square, and slot 4 is located on the pairing arm of angle of set square longest edge.
5, a kind of myopia-preventing frame according to claim 1 and 2 is characterized in that support plate 2 is rectangular slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93202850 CN2146897Y (en) | 1993-02-13 | 1993-02-13 | Nearsight proof frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93202850 CN2146897Y (en) | 1993-02-13 | 1993-02-13 | Nearsight proof frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2146897Y true CN2146897Y (en) | 1993-11-24 |
Family
ID=33786894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93202850 Expired - Fee Related CN2146897Y (en) | 1993-02-13 | 1993-02-13 | Nearsight proof frame |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2146897Y (en) |
-
1993
- 1993-02-13 CN CN 93202850 patent/CN2146897Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |