CN207449469U - A kind of blackboard - Google Patents
A kind of blackboard Download PDFInfo
- Publication number
- CN207449469U CN207449469U CN201720444699.XU CN201720444699U CN207449469U CN 207449469 U CN207449469 U CN 207449469U CN 201720444699 U CN201720444699 U CN 201720444699U CN 207449469 U CN207449469 U CN 207449469U
- Authority
- CN
- China
- Prior art keywords
- plate body
- pinion gear
- pinion
- blackboard
- plate face
- 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
Links
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- Drawing Aids And Blackboards (AREA)
Abstract
The utility model discloses a kind of blackboards, including plate body, pinion gear is installed on the plate body, the axial direction of the pinion gear is mutually perpendicular to plate body, further include two racks being mutually parallel, two racks engage respectively with pinion gear, and rotation pinion can drive two racks to do linear movement round about, and the upper surface of each rack is connected to extension plate face.The utility model can make the space enlargement of blackboard, and the writing on the blackboard writing amount of teacher can increase, in addition, the position of extension plate face can change with the movement of pinion stand, to achieve the purpose that not block the writing on the blackboard on plate body, while teacher is facilitated to write, greatly facilitate teaching.
Description
Technical field
The utility model is related to instructional technology field more particularly to a kind of blackboards with extension plate face.
Background technology
Blackboard is not to refer in particular to the plate face of black, said in traditional sense it be one can be with the plane of repeated writing, plate face is hard
Firmly, it is chiefly used in imparting knowledge to students.Made of plank or ground glass etc., it can be write with the specific writing material such as chalk above.
Mostly black, blackish green, white or ecru.
Teachers association often writes writing on the blackboard in teaching process, but blackboard space is limited, when the content of writing on the blackboard is more
Time will be limited be subject to space-time, and the frequent blackboard wiping of teachers association was not only lost time, but also can influence capture of the student to information.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of blackboard, the defects of blackboard space can be overcome limited.
The utility model solves above-mentioned technical problem by following technological means：
A kind of blackboard including plate body, is equipped with pinion gear on the plate body, the axial direction of the pinion gear is mutually hung down with plate body
Directly, two racks being mutually parallel are further included, two racks engage respectively with pinion gear, and rotation pinion can drive two
Rack does linear movement round about, and the upper surface of each rack is connected to extension plate face.
What is reached has the technical effect that, the rotation of pinion gear, can drive and do linear movement with the intermeshing rack of pinion gear,
Due to being connected with extension plate face on rack, then the movement of extension plate face will be driven, in this way, can be with clipboard except on plate body
Book, writing on the blackboard, and mobile rack at any time can also be write in plate face by extending, and the writing on the blackboard not interfered on plate body is blocked.
Further, the pinion gear is mounted on by pinion stand on plate body, and the pinion gear can be rotated along pinion stand.
Further, the quantity of the pinion gear is no less than 2.It so can more increase the quantity of extension plate body, with
Increase writing on the blackboard writing space.
Further, the rack one side that is connected with extension plate face is provided with dovetail groove, and the extension plate face is connected with rack
One side is provided with sliding block, and the sliding block is slidably matched with dovetail groove grafting.Except that can also be moved with the position of mobile rack
Plate face and the relative position of rack are extended, can so prevent expansion board blocking in face of plate body.
Further, be provided with horizontal concrete chute and/or longitudinal chute on the plate body, the pinion stand with it is horizontal and/or vertical
It is slidably matched to sliding slot.Pinion stand can be moved along sliding slot, it is possible to the position of more flexible fixed extension plate face, it can be with
The extension in space is realized to greatest extent, and maximum fault information is once transferred to student to realize.
Further, it is connected with the slot for placing chalk below the extension plate face.No matter teacher station wherein can
Chalk, aspect teaching are taken everywhere.
The beneficial effects of the utility model：(1) by being provided with pinion gear, rack and extension plate face on plate body, make black
The space enlargement of plate, the writing on the blackboard writing amount of teacher can increase, with the amount of transmitted information for once giving student enough；(2) plate face is extended
Position can change with the movement of pinion stand, to achieve the purpose that not block the writing on the blackboard on plate body, while facilitate teacher
Writing, greatly facilitates teaching.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the top view of the utility model；
Fig. 3 is the usage state diagram of the utility model.
Specific embodiment
The utility model is described in detail below with reference to attached drawing：
As shown in Figs. 1-2：
A kind of blackboard including plate body 1, is equipped with 2 pinion gears 2 on the plate body 1, the pinion gear 2 passes through pinion stand
21 are mounted on plate body 1, and the pinion gear 2 can be rotated along pinion stand 21；The axial direction of the pinion gear 2 is mutually hung down with plate body 1
Directly, four racks being mutually parallel 3 are further included, rack 3 engages respectively with pinion gear 2 described in each two, and rotation pinion 2 can
Two racks 3 is driven to do linear movement round about, the upper surface of each rack 3 is connected to extension plate face 4, institute
It states the one side that is connected with extension plate face 4 of rack 3 and is provided with dovetail groove, the extension plate face 4 one side that is connected with rack 3 is provided with cunning
Block, the sliding block are slidably matched with dovetail groove grafting, and the lower section for stating extension plate face 4 is connected with the slot 41 for placing chalk.
As being further improved for scheme, horizontal concrete chute and/or longitudinal chute 11, the tooth are provided on the plate body 1
Wheel seat 21 is slidably matched with laterally and/or longitudinally sliding slot 11.
Above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although with reference to preferred embodiment pair
The utility model is described in detail, it will be understood by those of ordinary skill in the art that, it can be to the technology of the utility model
Scheme is modified or replaced equivalently, and without departing from the objective and scope of technical solutions of the utility model, should all be covered
Among the right of the utility model.Technology that the utility model is not described in detail, shape, construction part are known
Technology.
Claims (1)
1. a kind of blackboard, including plate body (1), it is characterised in that：Pinion gear (2), the pinion gear are installed on the plate body (1)
(2) axial direction is mutually perpendicular to plate body (1), further includes two racks being mutually parallel (3), two racks (3) respectively with
Pinion gear (2) engages, and rotation pinion (2) can drive two racks (3) to do linear movement round about, each rack
(3) upper surface is connected to extension plate face (4)；The pinion gear (2) is mounted on by pinion stand (21) on plate body (1),
The pinion gear (2) can rotate along pinion stand (21), and the quantity of the pinion gear (2) is no less than 2, the rack (3) with
Extension plate face (4) one side that is connected is provided with dovetail groove, and the extension plate face (4) one side that is connected with rack (3) is provided with sliding block, institute
It states sliding block to be slidably matched with dovetail groove grafting, horizontal concrete chute and/or longitudinal chute (11) is provided on the plate body (1), it is described
Pinion stand (21) is slidably matched with laterally and/or longitudinally sliding slot (11), and placement chalk is connected with below the extension plate face (4)
Slot (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720444699.XU CN207449469U (en) | 2017-04-25 | 2017-04-25 | A kind of blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720444699.XU CN207449469U (en) | 2017-04-25 | 2017-04-25 | A kind of blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207449469U true CN207449469U (en) | 2018-06-05 |
Family
ID=62247050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720444699.XU Expired - Fee Related CN207449469U (en) | 2017-04-25 | 2017-04-25 | A kind of blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207449469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654143A (en) * | 2019-11-07 | 2020-01-07 | 余桂东 | Modularization blackboard |
-
2017
- 2017-04-25 CN CN201720444699.XU patent/CN207449469U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654143A (en) * | 2019-11-07 | 2020-01-07 | 余桂东 | Modularization blackboard |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180605 Termination date: 20190425 |