CN2152681Y

CN2152681Y - Rotary blackboard

Info

Publication number: CN2152681Y
Application number: CN 93233421
Authority: CN
Inventors: 王石罗
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-09
Filing date: 1993-03-09
Publication date: 1994-01-12
Anticipated expiration: 2003-03-09

Abstract

The utility model relates to a rotary blackboard. Annular slab bands which are carriers for a board surface are used for writing and are tightened by two rollers. The two rollers are respectively installed on a base by two bearings, and any roller of the two rollers can be rotated by hand or electric force for making a writing board optionally moved. In order to prevent the annular slab bands from being concave downwards at the time of writing, supporting boards are installed on the opposite side of the board surface for effectively solving the problems of the existing blackboards used for teaching, such as small board surface, uncomfortable writing, influence on light of sight, etc.

Description

Rotary blackboard

The swinging blackboard belongs to culture and education apparatus field.

The existing blackboard that is used to impart knowledge to students is generally the wall of rectangular slab crosswise fixed in the place ahead, classroom, always is the important tool of impart knowledge.It has the place of several deficiencies: the one, and the space of a whole page is little, the content of courses in the time of generally can not holding a class; The 2nd, during the space of a whole page, will lift very highly by hand above writing blackboard for the person of giving lessons, and bend over again to go down on one's knees below writing the time, at this moment not only writes discomfort, and influence writing quality; The 3rd, the person of giving lessons can influence a part of participant's sight line when the space of a whole page is write below blackboard, and reduces teaching quality.

The purpose of this utility model is that a kind of swinging blackboard will be provided, it can solve effectively the space of a whole page that existing blackboard exists little, write discomfort, influence problem such as sight line.

The purpose of this utility model is achieved in that with annular strip as revolution blackboard space of a whole page carrier, the annular strip relies on and goes up cylinder (or upper belt-wheel, Hereinafter the same) and bottom roll (or following belt wheel, tensioning Hereinafter the same), upper and lower cylinder respectively is installed on the pedestal by two bearing blocks, be fixed on the wall in the place ahead, classroom (for more smooth wall by pedestal again, 4 bearing blocks can directly be fixed on the wall), preferably go up cylinder up in the time of fixedly, bottom roll below, also can make on the left side of upper and lower cylinder for special circumstances, one on the right.Not make power in order preventing from the space of a whole page, to write, to be added with the supporting plate (for more smooth wall, supporting plate can directly be fixed on the wall) that is fixed on the pedestal at the reverse side of the space of a whole page.

The swinging blackboard described in the utility model place different with existing blackboard mainly contains two aspects: the one, and swinging blackboard carrier annular strip is to use flexible material, as rubber, flexible plastic, various fabric or enclose one deck rubber, plastics or other is beneficial to the material of writing and makes on fabric; Or with the strip rigid material metallic plate of polylith, non-metal board is formed by connecting.And generally being focussing glass, plank, iron plate with rigid material such as bulk etc., makes in the space of a whole page carrier of existing blackboard.The 2nd, the space of a whole page of swinging blackboard is (revolution) that can move at any time, and the existing blackboard space of a whole page can not move at any time.Because swinging blackboard space of a whole page carrier is annular strip, it can walk around two cylinders, and by two cylinder tensionings, this is just the same with band conveyor, as long as make any one rotation among two cylinders, annular strip will be rotated, and drives another cylinder by the frictional force between band and the cylinder and rotates, thereby make annular strip do gyration, so just realized moving at any time of the space of a whole page.The mobile weak point that has overcome existing blackboard existence of the space of a whole page.Existing blackboard is not because of moving at any time, can conveniently write in order to look after the person of giving lessons, the participant helps study, general space of a whole page area can only be between 1～2.5 square metre, the swinging blackboard then can make the space of a whole page expand to more than 5 square metres, the lecture contents when being large enough to hold next class like this, and such benefit is: when the person of giving lessons finishes soon at a class, the participant that allows of system recalls the content that a class was learned from the beginning to the end, helps improving the quality of teaching.Because of the space of a whole page can move at any time, the person of giving lessons can write on a position that is suitable for most oneself writing all the time, thereby reaches best writing effect.The space of a whole page is mobile at any time simultaneously, and the time that makes the person of giving lessons oneself health block participant's sight line shortens greatly, thereby improves teaching quality.The form of rotary drum can have three kinds: a kind of is the handwheel that is rigidly connected with hand rotation and bottom roll; A kind of is by motor-driven; A kind of is directly to tear annular strip with hand.The third method, structure is the simplest, but also practical fully.If by the handwheel head roll space of a whole page is moved, handwheel generally is advisable to be installed on the bottom roll, and for convenience of the person of giving lessons who writes with left hand, bottom roll the right and left can be installed handwheel.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

According to the swinging blackboard that the utility model proposes its:

Fig. 1 is that the annular strip is to look schematic diagram with the swinging blackboard master that flexible material is made when being assembled into user mode;

Fig. 2 is that schematic diagram is looked on the right side of Fig. 1;

Fig. 3 looks schematic diagram with the annular strip master that the microscler rigid material of polylith is made;

Fig. 4 is that schematic diagram is looked on the right side of Fig. 3.

Describe in detail according to specific structural details and the working condition that the utility model proposes below in conjunction with institute's drawings attached.

Cylinder (6) or upper belt-wheel (22) and bottom roll (13) or upper belt-wheel (25) tensioning in space of a whole page carrier annular strip (1) dependence of swinging blackboard, last cylinder (6) or upper belt-wheel (22) are then by 2 bearing blocks (5), and bottom roll (13) or following belt wheel (25) then are installed on the pedestal (12) by 2 bearing blocks (17).In order to prevent from space of a whole page A, to write, do not make power, it is recessed to be that annular strip (1) is pressed the direction shown in the arrow (9), reverse side at the space of a whole page A of annular strip is added with the supporting plate (8) that is fixed on the pedestal (12), in order to wipe the written contents on the space of a whole page, blackboard brush (20) is equipped with in below at bottom roll (13) or following belt wheel (25), when needs are wiped content on the space of a whole page, only need press shown in the arrow (18), blackboard brush (20) is close to the space of a whole page, rotate handwheel (16), driving bottom roll (13) or following belt wheel (25) presses shown in arrow (14) or the arrow (15) and rotates, by the rotation of bottom roll (13) or following belt wheel (25), drive tensioning annular strip (1) is thereon pressed shown in arrow (7) or the arrow (10) and is moved, and the content on the space of a whole page is wiped.Content as on the need reservation space of a whole page then gets final product by making blackboard brush (20) leave the space of a whole page shown in the arrow (19).When giving lessons, should write having on one section space of a whole page A of supporting plate (8), certainly, supporting plate (8) should be installed in optimal writing position, when the content written on the space of a whole page A reached a certain amount of, the person of giving lessons can rotate handwheel (16) or starter motor (4) with hand, and space of a whole page A is moved on shown in the arrow (7), along with the timely of the space of a whole page moved, the participant can in time see content written like this.Because last cylinder (6) or upper belt-wheel (22) and bottom roll (13) or following belt wheel (25) are with annular strip (1) tensioning, effect by frictional force, press rotation shown in the arrow (3) by cylinder (6) in annular strip (1) drive of moving shown in the arrow (7), move thereby make annular strip (1) successfully finish ring-type, the whole space of a whole page all can be write.As recalling written contents at any time, as long as rotate handwheel (16), driving bottom roll (13) or following belt wheel (25) presses shown in the arrow (15) and rotates, space of a whole page A then moves down shown in arrow (10), last cylinder (6) is then pressed shown in the arrow (2) and is rotated, thereby reaches the purpose of looking back content that award the front at any time.Bearing block (5), (17) and supporting plate (8) are installed on the pedestal (12) by screw (11), are installed on the wall (21) in the place ahead, classroom again.Generally form for the annular strip (1) that polylith strip rigid material metallic plate, non-metal board are formed by connecting, be shaped on the rectangular plate (24) for the hole (26) of passing the endless belt by the rectangular plate of polylith (24) and endless belt (23).

Claims

1, the utility model is a kind of swinging blackboard, it is characterized in that: the space of a whole page carrier that is used to write is annular strip (1), it relies on goes up cylinder (6) [or upper belt-wheel (22)] and bottom roll (13) [or following belt wheel (25)] tensioning, last cylinder (6) [or upper belt-wheel (22)] is then by 2 bearing blocks (4), and bottom roll (13) [or following belt wheel (25)] then is installed on the pedestal (12) by 2 bearing blocks (17); Reverse side at the space of a whole page A of annular strip (1) is added with the supporting plate (8) that is fixed on the pedestal (12); In the below of bottom roll (13) blackboard brush (20) is housed.

2, swinging blackboard according to claim 1 is characterized in that annular strip (1) is to use flexible material: rubber, flexible plastic, various fabric, or on fabric, enclose the material that one deck rubber, plastics or other profits write and make; Also can be formed by connecting by endless belt (23) with polylith strip rigid material metallic plate or nonmetallic rectangular plate (24).

3, according to claim 1,2 described swinging blackboards, it is characterized in that: be shaped on the rectangular plate (24) for the hole (26) of passing endless belt (23).

4, swinging blackboard according to claim 1 is characterized in that: on bottom roll (13) or following belt wheel (25) handwheel (16) is installed.

5, swinging blackboard according to claim 1 is characterized in that: on last cylinder (6) or upper belt-wheel (22) motor (4) is installed.