CN108973444A - A kind of reciprocal suitching type is from erasing blackboard - Google Patents
A kind of reciprocal suitching type is from erasing blackboard Download PDFInfo
- Publication number
- CN108973444A CN108973444A CN201810908421.2A CN201810908421A CN108973444A CN 108973444 A CN108973444 A CN 108973444A CN 201810908421 A CN201810908421 A CN 201810908421A CN 108973444 A CN108973444 A CN 108973444A
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- CN
- China
- Prior art keywords
- blackboard
- annular
- shaft
- rotating shaft
- suspension
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
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- Drawing Aids And Blackboards (AREA)
Abstract
The present invention relates to a kind of reciprocal suitching types from erasing blackboard, including suspension and two pieces of blackboards, there are first rotating shaft and the second shaft arranged side by side up and down on blackboard, be respectively placed on suspension blackboard on both sides and with the matched two first annular slots of first rotating shaft, the both ends of first rotating shaft are respectively placed in two first annular slots；Be respectively placed on suspension blackboard on both sides and with matched two the second annular grooves of the second shaft, the both ends of the second shaft are respectively placed in two the second annular grooves；The lower part juxtaposition on the top of first annular slot and the second annular groove；The both ends of second shaft are respectively installed with the change being placed in the second annular groove, have on suspension and the matched annular recessing groove of change, two changes are respectively placed in the equal drawstring of two segment length at left and right sides of change and are connected, and drawstring is placed in annular recessing groove and in tension；Equipped with the blackboard eraser being placed on the left of blackboard on blackboard；There is magnet in the end of first rotating shaft, and the slot bottom of first annular slot is magnetic metal block.
Description
Technical field
The present invention relates to educational aid technical field, especially a kind of reciprocal suitching type is from erasing blackboard.
Background technique
Blackboard transmits carrier as the main information in teaching process, is still widely used at present by each educational institution,
Convenient and fast Reusability function meets the interactive teaching and learning of presentation or not timing at any time of the content of courses in daily teaching very much.But
It is that existing blackboard needs little by little to wipe using blackboard eraser after writing, and blackboard area is usually larger, and erase process is time-consuming
Arduously, frequent write can make academics and students consume excessive physical strength with erasing, and occupy the more classroom instruction time.
In addition, it is contemplated that some complex contents are imparted knowledge to students when such as high number, physics, also to retain one always in erase process
A little figures or formula, in order to do in imparting knowledge to students in next step explanation with reference to or take notes convenient for student, but a large amount of books can be occupied in this way
Space is write, erasing times are further increased；In order to solve this problem, some blackboards use two pieces of blackboard slide handovers
Structure allows and the content retained is needed to be shown on one piece of blackboard always for use as reference or taken down notes convenient for student, but still
It can not solve the problems, such as frequently to wipe and erase process is time-consuming and laborious, thus, on the basis of guaranteeing existing blackboard function, increase
Function is quickly and easily wiped, the waste of unnecessary physical strength and energy in teaching process can be greatly mitigated.
Summary of the invention
For above situation, to make up technical deficiency present in the prior art, the present invention provides a kind of reciprocal suitching type
From erasing blackboard, to solve the problems, such as that it is time-consuming and laborious in the reference displaying and erase process of the content of courses that existing blackboard is not easy to.
Its technical solution solved is: the blackboard of suspension and the setting of two pieces of longitudinal perpendiculars including longitudinal perpendicular setting, institute
Equipped with setting before and after axis and first rotating shaft arranged side by side up and down and the second shaft on the blackboard stated, the diameter of first rotating shaft is greater than the
The diameter of two shafts, the length of the length of first rotating shaft less than the second shaft；It is respectively placed on the suspension before and after blackboard
Two sides and with the matched two first annular slots of first rotating shaft, the both ends of first rotating shaft are respectively slidably placed in two the first rings
In shape slot, first rotating shaft is done along first annular slot and back-shaped reciprocatingly slide and blackboard is driven to move；Have on the suspension and sets respectively
In blackboard front and rear sides and with matched two the second annular grooves of the second shaft, the both ends of the second shaft are respectively slidably placed in
In two the second annular grooves, the second shaft is done along the second annular groove and back-shaped reciprocatingly slide and blackboard is driven to move；Described first
Annular groove and the second annular groove are smoothly connected by two arc grooves opposing upper and lower through two sections of vertically arranged straight troughs respectively to be constituted,
For the depth of first annular slot less than the depth of the second annular groove, the lower part of the top of first annular slot and the second annular groove intersects weight
It is folded；The both ends of second shaft are respectively installed with the change being placed in the second annular groove, have on suspension and match simultaneously with change
With the consistent annular recessing groove in the second annular groove path, it is equal that two changes are respectively placed in two segment length at left and right sides of change
Drawstring be connected, drawstring is placed in annular recessing groove and in tension；It is equipped with and is placed on the left of blackboard i.e. on the blackboard
The blackboard eraser of the longitudinal perpendicular setting of back side；The end insertion of the first rotating shaft is equipped with magnet, the slot bottom of first annular slot
Insertion is equipped at least one magnetic metal block.
Structure of the invention is ingenious, can not only realize the switching of the front and back, upper and lower position between two blackboards, can also be achieved two
Mutual erasing between person, the two is interrelated, supports one another, and saves manpower and time, effectively improves existing blackboard eraser
Except problem time-consuming and laborious in the process.
Detailed description of the invention
Fig. 1 is main view of the invention.
Fig. 2 is A-A cross-sectional view of the invention.
Fig. 3 is B-B cross-sectional view of the invention.
Fig. 4 is the enlarged drawing of C portion in Fig. 1 of the invention.
Fig. 5 is left view of the invention.
Fig. 6 is isometric cutaway view of the invention.
Fig. 7 is the enlarged drawing of the part D in Fig. 6 of the invention.
Fig. 8 is the enlarged drawing of the part E in Fig. 6 of the invention.
Fig. 9 is the main view of suspension in the present invention.
Figure 10 is the axonometric drawing of suspension in the present invention.
Specific embodiment
Below in conjunction with attached drawing, specific embodiments of the present invention will be described in further detail.
It is provided by Fig. 1 to Figure 10, the present invention includes the suspension 1 of longitudinal perpendicular setting and the blackboard of two pieces of longitudinal perpendiculars setting
2, equipped with setting before and after axis and first rotating shaft 3 arranged side by side up and down and the second shaft 4 on the blackboard 2, first rotating shaft 3 it is straight
Diameter is greater than the diameter of the second shaft 4, the length of the length of first rotating shaft 3 less than the second shaft 4；There is difference on the suspension 1
Be placed in 2 front and rear sides of blackboard and with 3 matched two first annular slots 5 of first rotating shaft, the both ends of first rotating shaft 3 are respectively slidably
Ground is placed in two first annular slots 5, and first rotating shaft 3 is done along first annular slot 5 and back-shaped reciprocatingly slide and blackboard 2 is driven to move；
Be respectively placed on the suspension 12 front and rear sides of blackboard and with matched two the second annular grooves 6 of the second shaft 4, second turn
The both ends of axis 4 are respectively slidably placed in two the second annular grooves 6, and the second shaft 4 does back-shaped reciprocal cunning along the second annular groove 6
It moves and blackboard 2 is driven to move；The first annular slot 5 and the second annular groove 6 is passed through by two arc grooves opposing upper and lower respectively
Two sections of vertically arranged straight troughs are smoothly connected composition, depth of the depth less than the second annular groove 6 of first annular slot 5, the first ring
The lower part juxtaposition on the top of shape slot 5 and the second annular groove 6；The both ends of second shaft 4, which are respectively installed with, is placed in
Change 7 in second ring slot 6, have on suspension 1 matched with change 7 and with the consistent annular recessing groove 8 in 6 path of the second annular groove,
The equal drawstring 9 of two segment length of two changes 7 through being respectively placed in 7 left and right sides of change is connected, and drawstring 9 is placed in annular resigning
It in slot 8 and is in tension, annular recessing groove 8 plays guidance supporting role to drawstring 9, another when any one blackboard 2 is mobile
A blackboard 2 also moves under the pulling of drawstring 9；Since the distance between axles d between two shafts is remained unchanged, so it is both real
Existing blackboard 2 remains that upright state realizes that two shafts are respectively in two annular grooves while continuous clockwise or counterclockwise again
Sliding, then:
A) it is d1=d2 that the vertical straight segment length of two annular grooves described in is necessarily equal, and the segment length is equal to first rotating shaft
3 and the second the sum of distance between axles d and the length d △ of the equitant vertical flat segments of two annular grooves between shaft 4, i.e. d1=d2=
D+d △ (△ >=0 d)；
B) it is w1=w2 that the left and right width of the center line of two annular grooves described in is necessarily equal.
Generate collision when two blackboards 2 are mobile simultaneously in order to prevent, the first rotating shaft 3 and 2 upper surface of blackboard away from
It is equitant no more than two annular grooves from the sum of d3 and the distance between the second shaft 4 and 2 lower end surface of blackboard d4 vertical straight
Length d △, that is, d3+d4≤d △ of section.
Blackboard eraser 10 equipped with the longitudinal perpendicular setting for being placed in i.e. back side on the left of blackboard 2 on the blackboard 2；Described first
The end insertion of shaft 3 is equipped with magnet 11, and the slot bottom insertion of first annular slot 5 is equipped at least one magnetic metal block 12,
When blackboard 2 be moved to magnet 11 it is corresponding with 12 position of magnetic metal block after, magnetic force gram between magnet 11 and magnetic metal block 12
Taking the gravity of blackboard 2, so that blackboard 2 is maintained at current location when not by external force motionless.
Preferably, horizontal equipped with the multiple levels being uniformly arranged for being placed in i.e. back side on the left of blackboard 2 on the blackboard 2
Connecting rod 13, the both ends of connecting rod 13 are hinged and connected with blackboard 2 and blackboard eraser 10 through axis in the front-back direction respectively, have on connecting rod 13 point
Be not placed in symmetrically arranged two reeds 14 in about 13 two sides of connecting rod, one end of reed 14 is connect with connecting rod 13, reed 14 it is another
One end contacts under the effect of its own elastic force with the extruding of blackboard 2, under the elastic force effect opposite each other of two reeds 14, connecting rod
13 keep horizontality constant.
Preferably, the through-hole 15 for having the left and right for being placed in any 13 lower section of connecting rod to run through blackboard 2 on the blackboard 2, black
There is the compression bar 16 horizontal across the level of through-hole 15 on plate 2, the middle part of compression bar 16 is with blackboard 2 through the hinged phase of axis in the front-back direction
Even, there is the sliding block 17 along the sliding of 13 own axes direction of connecting rod on any connecting rod 13 corresponding with compression bar 16, compression bar 16
One end is bent upwards to any 13 direction of connecting rod and is hinged and connected with sliding block 17 through axis in the front-back direction, compression bar 16
The other end has pressure handle 18, and when pulling pressure handle 18 rotates compression bar 16, compression bar 16 drives 13 turns of any connecting rod through sliding block 17
It is dynamic, and then drive multiple connecting rods 13 to rotate in same direction through blackboard eraser 10, while blackboard eraser 10 keeps current upright state and generates displacement making
The distance between blackboard eraser 10 and blackboard 2 become smaller.
Preferably, the blackboard 2 includes framework 19 and the cover board 20 that is overlying on 19 right side of framework, described first
Shaft 3 and the second shaft 4 are placed in framework 19, and the blackboard eraser 10 is placed in the left side of framework 19.
Preferably, the blackboard eraser 10 includes bottom plate 21 and the felt block 22 being overlying on 21 left side of bottom plate.
Two pieces of blackboards 2 are loaded on suspension 1 by the present invention in use, pressing above embodiment, what selection was write
One blackboard 2, is pulled downward on, since change 7 and two sections of drawstrings 9 link together the second shaft 4 on two blackboards 2
And the equal length of two sections of drawstrings 9, therefore, when any blackboard 2 moves, another blackboard 2 is inevitable to do contrary movement simultaneously,
Therefore any blackboard 2, when being pulled to the lower part of suspension 1, another blackboard 2 is moved to 1 top of suspension, uses two pieces of blackboards 2 simultaneously
In the different content of courses of displaying；And at least one corresponding magnet 11 of blackboard 2 is corresponding with magnetic metal block 12 and by it at this time
Absorption fixes the vertical position of the blackboard 2, therefore two pieces of blackboards 2 will not generate position movement after external force removal.
Since two annular grooves are closed loop configuration, therefore it is suitable simultaneously two pieces of blackboards 2 can be made to realize according to above-mentioned implementation method
Hour hands or continuous movement counterclockwise, therefore, when needing to wipe the content on one of blackboard 2, continuous moving
The blackboard 2 of needs erasing makes itself and another 2 conversion levels position of blackboard, when the blackboard 2 that needs are wiped is placed in another blackboard 2
After back side corresponds to the left side in attached drawing 1, move up and down another blackboard 2, blackboard eraser 10 corresponding to another blackboard 2 with need to wipe
The plate face of the blackboard 2 removed generates CONTACT WITH FRICTION and wipes the content on the blackboard 2 for needing to wipe；When needing to one of black
When content on plate 2 retain and carry out vertical position movement to the blackboard 2, before which is moved to another blackboard 2
Side corresponds to the right side in attached drawing 1, and the content on the blackboard 2 for needing to retain content will not be produced by moving another blackboard 2 at this time
It is raw to influence；Or pulling corresponding pressure handle 18 on another blackboard 2 rotates corresponding compression bar 16, compression bar 16 is through corresponding 17 band of sliding block
A corresponding connecting rod 13 rotation is moved, and then drives multiple connecting rods 13 to rotate in same direction through blackboard eraser 10, while blackboard eraser 10 keeps current
Upright state and generating displacement makes the distance between blackboard eraser 10 and another blackboard 2 become smaller, therefore, corresponding plate on another blackboard 2
It wipes and is separated between 10 and the blackboard 2 for needing to retain content, move up and down another blackboard 2 at this time, blackboard eraser 10 will not will need to retain
Content erasing on the blackboard 2 of content；Pressure handle 18 is unclamped after operation, connecting rod 13 resets under the elastic force effect of reed 14 to be made
Blackboard eraser 10 resets, in order to next erasing operation.
Since blackboard eraser 10 is different from existing blackboard eraser, may be implemented by the length setting to blackboard eraser 10 disposably will be black
The erasing completely of plate 2 is clean, and erase process is simple and quick, and need not consume many-body force；In addition, passing through the rotation control to connecting rod 13
The blackboard 2 in the left side that system can make the position for changing blackboard eraser 10 correspond to it i.e. in attached drawing 1 with rear side separates, and guarantee does not need to wipe
Except when the content on any blackboard 2 is retained.
It is to sum up not difficult to obtain, the rotation of connecting rod 13 is controlled using pressure handle 18, may be implemented to blackboard eraser 10 and blackboard
Between relative position generate change, and then selective erasing operation or content reservation operations according to actual needs, it is suitable for
Under a variety of actual use demands:
A) content on any blackboard 2 is quickly wiped；
B) retain the content on any blackboard 2 and the content on another blackboard 2 is quickly wiped；
C) retain simultaneously the content on two pieces of blackboards 2 and on demand transformation the two upper and lower position in order to on any blackboard 2
Appearance is modified at any time.
As it can be seen that two blackboards can be carried out front and back by the present invention, upper and lower position switches, and realize mutual wiping between the two
It removes, when being imparted knowledge to students using the present invention, the quick erasing to any blackboard can be not only realized by shirtsleeve operation, saves people
Power and time can also be achieved in the case where the content on any blackboard is not wiped free of, to another blackboard at any time carry out write or
Content modification effectively improves time-consuming and laborious during existing blackboard is wiped on the basis of retaining existing blackboard repertoire
Problem.
Claims (5)
1. a kind of reciprocal suitching type is from erasing blackboard, including suspension (1) and it is parallel to two pieces of blackboards (2) of suspension (1), feature
It is, is equipped on the blackboard (2) and is parallel to blackboard (2) horizontal length direction and is set side by side along blackboard (2) short transverse
First rotating shaft (3) and the second shaft (4), the diameter of first rotating shaft (3) is greater than the diameter of the second shaft (4), first rotating shaft (3)
Length less than the second shaft (4) length；It is respectively placed on the suspension (1) on the outside of (2) two horizontal ends of blackboard
And with first rotating shaft (3) matched two first annular slots (5), the both ends of first rotating shaft (3) be respectively placed in two it is first annular
In slot (5)；It is respectively placed on the suspension (1) on the outside of (2) two horizontal ends of blackboard and matched with the second shaft (4)
Two the second annular grooves (6), the both ends of the second shaft (4) are respectively placed in two the second annular grooves (6)；Described is first annular
The depth of slot (5) less than the second annular groove (6) depth, one of a part of first annular slot (5) and the second annular groove (6)
Divide juxtaposition；The both ends of second shaft (4) are respectively installed with the change (7) being placed in the second annular groove (6), suspension
(1) have on and be respectively placed in the two of change (7) axis two sides with change (7) matched annular recessing groove (8), two changes (7)
The equal drawstring of segment length (9) is connected, and drawstring (9) is placed in annular recessing groove (8) and in tension；The blackboard
(2) blackboard eraser (10) for being placed in blackboard (2) back side and being parallel to blackboard (2) is housed on；There is magnetic in the end of the first rotating shaft (3)
Iron (11), the slot bottom of first annular slot (5) have at least one magnetic metal block (12).
Switch 2. one kind according to claim 1 is reciprocal from erasing type blackboard, which is characterized in that be equipped with and set on blackboard (2)
In the multiple connecting rods (13) being uniformly arranged of blackboard (2) back side, the both ends of connecting rod (13) are cut with scissors with blackboard (2) and blackboard eraser (10) respectively
It connects connected, there is two rotating sides symmetrically arranged two relative to blackboard (2) for being respectively placed in connecting rod (13) on connecting rod (13)
One end of reed (14), reed (14) is connect with connecting rod (13), the other end of reed (14) under the effect of its own elastic force with it is black
Plate (2) squeezes contact.
3. a kind of reciprocal suitching type according to claim 2 is from erasing blackboard, which is characterized in that have on blackboard (2) vertical
Through-hole (15) through blackboard (2) has the compression bar (16) across through-hole (15), the middle part of compression bar (16) and blackboard on blackboard (2)
(2) axis for being parallel to the pivot center relative to blackboard (2) of connecting rod (13) is hinged and connected, on any connecting rod (13)
There is the sliding block (17) along the sliding of connecting rod (13) own axes direction, one end and sliding block (17) of compression bar (16) are through both perpendicular to even
The axis of bar (13) and compression bar (16) is hinged and connected, and the other end of compression bar (16) has pressure handle (18).
4. a kind of reciprocal suitching type according to claim 1 is from erasing blackboard, which is characterized in that blackboard (2) includes framework
(19) and it is overlying on the cover board (20) of framework (19) side, the first rotating shaft (3) and the second shaft (4) are placed in framework (19)
On, the blackboard eraser (10) is placed in the other side of framework (19).
5. a kind of reciprocal suitching type according to claim 1 is from erasing blackboard, which is characterized in that blackboard eraser (10) includes bottom plate
(21) and it is overlying on the felt block (22) of bottom plate (21) side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810908421.2A CN108973444A (en) | 2018-08-10 | 2018-08-10 | A kind of reciprocal suitching type is from erasing blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810908421.2A CN108973444A (en) | 2018-08-10 | 2018-08-10 | A kind of reciprocal suitching type is from erasing blackboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108973444A true CN108973444A (en) | 2018-12-11 |
Family
ID=64554281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810908421.2A Pending CN108973444A (en) | 2018-08-10 | 2018-08-10 | A kind of reciprocal suitching type is from erasing blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108973444A (en) |
Cited By (3)
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| CN110667285A (en) * | 2019-10-09 | 2020-01-10 | 高威震 | Note book |
| CN115489224A (en) * | 2022-09-30 | 2022-12-20 | 富阳学院 | Teaching aid |
| CN115731750A (en) * | 2022-11-21 | 2023-03-03 | 黑龙江工商学院 | English-Chinese translation contrast training device in college English teaching and use method thereof |
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| CN115731750A (en) * | 2022-11-21 | 2023-03-03 | 黑龙江工商学院 | English-Chinese translation contrast training device in college English teaching and use method thereof |
| CN115731750B (en) * | 2022-11-21 | 2023-05-23 | 黑龙江工商学院 | English-Chinese inter-translation comparison training device in college English teaching and application method thereof |
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Application publication date: 20181211 |