CN210706628U

CN210706628U - Blackboard for Chinese teaching

Info

Publication number: CN210706628U
Application number: CN201921696394.3U
Authority: CN
Inventors: 郑超; 葛瑞影; 王磊; 兰昕; 吴丽华; 曾凡芹; 祝亚菲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-06-09
Anticipated expiration: 2029-10-11

Abstract

The utility model discloses a blackboard is used in chinese teaching relates to teaching aid technical field, including guide plate, framework, projection board down, go up guide plate, fly leaf, fixed plate, positive stop, backstop, transmission groove, transfer line, first helical gear, second helical gear, third helical gear, fourth helical gear, connecting rod, dead lever, long-pending powder groove and lower powder hole, its characterized in that: the fixing rod is fixedly arranged at the rear part in the frame body; has the advantages that: the projection screen is spliced by arranging the projection plates, and the projector can be blurred to image by turning over the projection plates, so that the classroom requirement can be met conveniently and quickly; the movable plate is arranged to slide on the lower guide plate, the powder accumulation groove is formed, and the chalk directly falls into the powder accumulation groove, so that the situation that the movable plate is affected by the chalk and is clamped is reduced; the rear surface of the projection board is arranged to be a cambered surface, so that the contact part between the projection boards is thinner, and the projection board is prevented from being blocked when rotating due to larger thickness; the front stop block and the rear stop block are arranged to stop the positions to quickly complete the positioning of the projection plate after the projection plate rotates.

Description

Blackboard for Chinese teaching

Technical Field

The utility model relates to a teaching aid technical field especially relates to a blackboard is used in chinese teaching.

Background

The blackboard is an essential device for teaching, multimedia teaching is gradually popularized along with the development of society, at present, various blackboards are available on the market, but they are single in structure, mostly simple projection screens and writing boards, but for the teaching of Chinese language, the contents required to be recited by students are more, the traditional projection screen has simple structure and only has the projection imaging function, but most of the time, teachers want to close the projection content, then ask students and open the showing content, but the traditional operation by closing the projector is troublesome, and the starting of the equipment consumes a certain time, which disturbs the teaching thought of teachers, therefore, teaching efficiency is influenced, and the lower parts of some blackboards are not provided with structures for discharging chalk powder, so that the sliding rail with the movable plate sliding can be blocked due to the fact that the powder cannot be discharged in time for a long time, and the service life of the blackboards is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a blackboard for Chinese teaching in order to solve the above problems.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a blackboard for chinese teaching, includes knob, lower guide plate, framework, projection board, goes up guide plate, fly leaf, fixed plate, positive stop, backstop, transmission groove, transfer line, first helical gear, second helical gear, third helical gear, fourth helical gear, connecting rod, dead lever, long-pending powder groove and lower powder hole, its characterized in that: the rear part fixed mounting has the dead lever in the framework, the dead lever right side is provided with the fixed plate, fixed plate fixed mounting is in the framework, the dead lever left side is provided with the projection screen, the projection screen is by a plurality of the projection board concatenation is constituteed, the equal level setting of projection board, projection board right-hand member passes through the bearing with the dead lever and is connected, projection board left end with the framework passes through the bearing and is connected, be provided with in the framework left side frame the driving groove, projection board left end extends to fixed mounting has the second helical gear in the driving groove, be provided with the transfer line in the driving groove, transfer line upper end and lower extreme are connected respectively on the framework through the bearing, fixed mounting has the first helical gear on the transfer line, first helical gear and the second helical gear mesh mutually, the lower part of the transmission rod is fixedly provided with the third bevel gear, the front side of the third bevel gear is provided with the fourth bevel gear, the fourth bevel gear is fixedly arranged on the connecting rod, the front end of the connecting rod extends out of the front surface of the frame body and is fixedly provided with the knob, the connecting rod is connected with the frame body through a bearing, the third bevel gear is meshed with the fourth bevel gear, the frame body is respectively and fixedly provided with the front stop block and the rear stop block corresponding to the projection plate, the front stop block is arranged above the front side of the projection plate, the rear stop block is arranged in the middle of the rear side of the projection plate, the movable plate is arranged in front of the frame body, the upper frame of the frame body is fixedly provided with the upper guide plate corresponding to the movable plate, the lower frame of the frame body is fixedly provided with the lower guide plate corresponding to the movable plate, and the frame body is clamped between the upper guide plate, the frame body is provided with the powder accumulating groove corresponding to the lower guide sheet, and the bottom surface of the right end of the powder accumulating groove is provided with the powder discharging hole.

Preferably: the number of the projection plates is 14.

Preferably: the rear surface of the projection plate is a cambered surface.

Preferably: balls are arranged between the upper guide sheet and the movable plate, and balls are arranged between the lower guide sheet and the movable plate.

Has the advantages that: the projection screen is spliced by arranging the projection plates, and the projector can be blurred to image by turning over the projection plates, so that the classroom requirement can be met conveniently and quickly; the movable plate is arranged to slide on the lower guide plate, the powder accumulation groove is formed, and the chalk directly falls into the powder accumulation groove, so that the situation that the movable plate is affected by the chalk and is clamped is reduced; the rear surface of the projection board is arranged to be a cambered surface, so that the contact part between the projection boards is thinner, and the projection board is prevented from being blocked when rotating due to larger thickness; the front stop block and the rear stop block are arranged to stop the positions to quickly complete the positioning of the projection plate after the projection plate rotates.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic view of a blackboard for Chinese teaching.

FIG. 2 is a front view of the blackboard for Chinese teaching.

Fig. 3 is a schematic structural diagram of a projection screen of a blackboard for Chinese teaching.

Fig. 4 is a sectional view of the blackboard for teaching Chinese according to the present invention from the direction of a-a.

Figure 5 is a B of blackboard enlargements for Chinese teaching.

Figure 6 is the utility model a C of blackboard for chinese teaching locates the enlarger.

Figure 7 is a D of blackboard for teaching chinese enlargements.

The reference numerals are explained below:

1. a knob; 2. a lower guide plate; 3. a frame body; 4. a projection board; 5. an upper guide plate; 6. a movable plate; 7. a fixing plate; 8. a front stop block; 9. a rear stop block; 10. a transmission groove; 11. a transmission rod; 12. a first helical gear; 13. a second helical gear; 14. a third bevel gear; 15. a fourth helical gear; 16. a connecting rod; 17. fixing the rod; 18. a powder accumulation groove; 19. and (6) powder discharging holes.

Detailed Description

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing and simplifying the description, but not for indicating or implying that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention, and further that the terms "first", "second", etc., are used only for descriptive purposes and are not to indicate or imply relative importance or imply the number of technical features being referred to, whereby the features defined as "first", "second", etc., may explicitly or implicitly include one or more such features, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or the two elements may be connected through an intermediate medium, and the specific meaning of the above terms in the present invention can be understood by those skilled in the art through specific situations.

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 to 7, a blackboard for Chinese teaching, which comprises a knob 1, a lower guide 2, a frame 3, a projection plate 4, an upper guide 5, a movable plate 6, a fixed plate 7, a front stop 8, a rear stop 9, a transmission groove 10, a transmission rod 11, a first helical gear 12, a second helical gear 13, a third helical gear 14, a fourth helical gear 15, a connecting rod 16, a fixed rod 17, a powder accumulation groove 18 and a powder discharge hole 19, and is characterized in that: a fixed rod 17 is fixedly arranged at the rear part in the frame body 3, the fixed rod 17 is used for fixing, a fixed plate 7 is arranged at the right side of the fixed rod 17, the fixed plate 7 is used for writing, the fixed plate 7 is fixedly arranged on the frame body 3, a projection screen is arranged at the left side of the fixed rod 17 and is used for projecting, the projection screen is formed by splicing a plurality of projection plates 4, the projection plates 4 are all horizontally arranged, the right end of the projection plate 4 is connected with the fixed rod 17 through a bearing, the left end of the projection plate 4 is connected with the frame body 3 through a bearing, a transmission groove 10 is arranged in the left frame of the frame body 3, the left end of the projection plate 4 extends into the transmission groove 10 and is fixedly provided with a second bevel gear 13, a transmission rod 11 is arranged in the transmission groove 10 and is used for transmission, the upper end and the lower end of the transmission rod 11 are respectively, the first helical gear 12 and the second helical gear 13 are used for transmission, the lower part of the transmission rod 11 is fixedly provided with a third helical gear 14, the front side of the third helical gear 14 is provided with a fourth helical gear 15, the fourth helical gear 15 is fixedly arranged on a connecting rod 16, the front end of the connecting rod 16 extends out of the front surface of the frame body 3 and is fixedly provided with a knob 1, the knob 1 is used for rotation, the connecting rod 16 is connected with the frame body 3 through a bearing, the third helical gear 14 is meshed with the fourth helical gear 15, the third helical gear 14 and the fourth helical gear 15 are used for transmission, the frame body 3 is respectively and fixedly provided with a front stop 8 and a rear stop 9 corresponding to the projection plate 4, the front stop 8 and the rear stop 9 are respectively used for stopping and positioning, the front stop 8 is arranged above the front side of the projection plate 4, the rear stop 9 is arranged in the middle of the rear side of the projection plate 4, the front part 6 is arranged in the frame body 3, the movable, the lower frame of the frame body 3 is fixedly provided with a lower guide vane 2 corresponding to the movable plate 6, the frame body 3 is clamped between the upper guide vane 5 and the lower guide vane 2 to slide, the upper guide vane 5 and the lower guide vane 2 are used as guide rails, the frame body 3 is provided with a powder accumulation groove 18 corresponding to the lower guide vane 2, the powder accumulation groove 18 is used for collecting powder, the bottom surface of the right end of the powder accumulation groove 18 is provided with a powder discharge hole 19, and the powder discharge hole 19 is used for discharging powder; the number of the projection plates 4 is 14, so that the imaging effect is disturbed; the rear surface of the projection plate 4 is a cambered surface, so that the projection plate 4 is prevented from being blocked when rotating; balls are arranged between the upper guide vane 5 and the movable plate 6, and balls are arranged between the lower guide vane 2 and the movable plate 6, so that the movable plate 6 slides more sensitively.

The working principle is as follows: when a teacher is in class and simply writes, the teacher can write on the movable plate 6 and the fixed plate 7, when a projector is required to show, the movable plate 6 is slid to the right side of the frame body 3, the rotary knob 1 and the fourth helical gear 15 rotate and are driven by the third helical gear 14 and the fourth helical gear 15, the transmission rod 11 rotates, the first helical gear 12 and the second helical gear 13 drive, the projection plate 4 rotates, the front stop block 8 blocks and positions, the front surface of the projection plate 4 is vertical, the projector can be opened to show teaching contents on the projection screen, writing is carried out on the movable plate 6, when the teacher needs to ask the teaching contents, the rotary knob 1 and the fourth helical gear 15 rotate and are driven by the third helical gear 14 and the fourth helical gear 15, the transmission rod 11 rotates, the first helical gear 12 and the second helical gear 13 drive, the projection plate 4 rotates, the rear stop block 9 blocks and positions, the front surface of the projection plate 4 is horizontal, the projection plate 4 cannot clearly image, the students can be asked questions, when the questions are asked, the knob 1 is rotated, the projection plate 4 is rotated, the front stop block 8 stops the positioning, and the front surface of the projection plate 4 is vertical, so that the teaching contents can be projected; in the process, chalk powder falls down into the powder accumulation groove 18, the powder in the powder accumulation groove 18 can be cleaned regularly, and the powder is discharged from the powder discharge hole 19.

Having shown and described the basic principles, essential features and advantages of the invention, it should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are merely illustrative, but rather are intended to cover various changes and modifications within the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a blackboard for chinese teaching, includes knob, lower guide plate, framework, projection board, goes up guide plate, fly leaf, fixed plate, positive stop, backstop, transmission groove, transfer line, first helical gear, second helical gear, third helical gear, fourth helical gear, connecting rod, dead lever, long-pending powder groove and lower powder hole, its characterized in that: the rear part fixed mounting has the dead lever in the framework, the dead lever right side is provided with the fixed plate, fixed plate fixed mounting is in the framework, the dead lever left side is provided with the projection screen, the projection screen is by a plurality of the projection board concatenation is constituteed, the equal level setting of projection board, projection board right-hand member passes through the bearing with the dead lever and is connected, projection board left end with the framework passes through the bearing and is connected, be provided with in the framework left side frame the driving groove, projection board left end extends to fixed mounting has the second helical gear in the driving groove, be provided with the transfer line in the driving groove, transfer line upper end and lower extreme are connected respectively on the framework through the bearing, fixed mounting has the first helical gear on the transfer line, first helical gear and the second helical gear mesh mutually, the lower part of the transmission rod is fixedly provided with the third bevel gear, the front side of the third bevel gear is provided with the fourth bevel gear, the fourth bevel gear is fixedly arranged on the connecting rod, the front end of the connecting rod extends out of the front surface of the frame body and is fixedly provided with the knob, the connecting rod is connected with the frame body through a bearing, the third bevel gear is meshed with the fourth bevel gear, the frame body is respectively and fixedly provided with the front stop block and the rear stop block corresponding to the projection plate, the front stop block is arranged above the front side of the projection plate, the rear stop block is arranged in the middle of the rear side of the projection plate, the movable plate is arranged in front of the frame body, the upper frame of the frame body is fixedly provided with the upper guide plate corresponding to the movable plate, the lower frame of the frame body is fixedly provided with the lower guide plate corresponding to the movable plate, and the frame body is clamped between the upper guide plate, the frame body is provided with the powder accumulating groove corresponding to the lower guide sheet, and the bottom surface of the right end of the powder accumulating groove is provided with the powder discharging hole.

2. The blackboard for teaching chinese language according to claim 1, wherein: the number of the projection plates is 14.

3. The blackboard for teaching chinese language according to claim 1, wherein: the rear surface of the projection plate is a cambered surface.

4. The blackboard for teaching chinese language according to claim 1, wherein: balls are arranged between the upper guide sheet and the movable plate, and balls are arranged between the lower guide sheet and the movable plate.